src/share/vm/gc/shared/collectedHeap.hpp

rev 13297 : 8180932: Parallelize safepoint cleanup
Summary: Provide infrastructure to do safepoint cleanup tasks using parallel worker threads
Reviewed-by: dholmes, rehn, dcubed, thartmann
rev 13298 : 8184751: Provide thread pool for parallel safepoint cleanup

*** 100,109 ****
--- 100,111 ----
    // or INCLUDE_JVMCI is being used
    bool _defer_initial_card_mark;
  
    MemRegion _reserved;
  
+   WorkGang* _safepoint_workers;
+ 
   protected:
    BarrierSet* _barrier_set;
    bool _is_gc_active;
  
    // Used for filler objects (static, but initialized in ctor).
*** 610,620 ****
    // it for use during safepoint cleanup. This is only possible
    // if the GC can pause and resume concurrent work (e.g. G1
    // concurrent marking) for an intermittent non-GC safepoint.
    // If this method returns NULL, SafepointSynchronize will
    // perform cleanup tasks serially in the VMThread.
!   virtual WorkGang* get_safepoint_workers() { return NULL; }
  
    // Non product verification and debugging.
  #ifndef PRODUCT
    // Support for PromotionFailureALot.  Return true if it's time to cause a
    // promotion failure.  The no-argument version uses
--- 612,622 ----
    // it for use during safepoint cleanup. This is only possible
    // if the GC can pause and resume concurrent work (e.g. G1
    // concurrent marking) for an intermittent non-GC safepoint.
    // If this method returns NULL, SafepointSynchronize will
    // perform cleanup tasks serially in the VMThread.
!   virtual WorkGang* get_safepoint_workers() { return _safepoint_workers; }
  
    // Non product verification and debugging.
  #ifndef PRODUCT
    // Support for PromotionFailureALot.  Return true if it's time to cause a
    // promotion failure.  The no-argument version uses