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6484982: G1: process references during evacuation pauses

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G1 now uses two reference processors - one is used by concurrent marking and the other is used by STW GCs (both full and incremental evacuation pauses). In an evacuation pause, the reference processor is embedded into the closures used to scan objects. Doing so causes causes reference objects to be 'discovered' by the reference processor. At the end of the evacuation pause, these discovered reference objects are processed - preserving (and copying) referent objects (and their reachable graphs) as appropriate.

Reviewed-by: ysr, jwilhelm, brutisso, stefank, tonyp
This commit is contained in:
John Cuthbertson 2011-09-22 10:57:37 -07:00
parent 70bb8e788e
commit 1b62d10b4b
20 changed files with 1448 additions and 632 deletions
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4
hotspot/src/share/vm/gc_implementation/g1/concurrentMark.hpp
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@ -366,8 +366,8 @@ class ConcurrentMark: public CHeapObj {
friend class CMConcurrentMarkingTask;
friend class G1ParNoteEndTask;
friend class CalcLiveObjectsClosure;
friend class G1RefProcTaskProxy;
friend class G1RefProcTaskExecutor;
friend class G1CMRefProcTaskProxy;
friend class G1CMRefProcTaskExecutor;
friend class G1CMParKeepAliveAndDrainClosure;
friend class G1CMParDrainMarkingStackClosure;