762 void print() const;
763 void print_on(outputStream* st) const;
764
765 // vo == UsePrevMarking -> use "prev" marking information,
766 // vo == UseNextMarking -> use "next" marking information
767 // vo == UseMarkWord -> use the mark word in the object header
768 //
769 // NOTE: Only the "prev" marking information is guaranteed to be
770 // consistent most of the time, so most calls to this should use
771 // vo == UsePrevMarking.
772 // Currently, there is only one case where this is called with
773 // vo == UseNextMarking, which is to verify the "next" marking
774 // information at the end of remark.
775 // Currently there is only one place where this is called with
776 // vo == UseMarkWord, which is to verify the marking during a
777 // full GC.
778 void verify(VerifyOption vo, bool *failures) const;
779
780 // Override; it uses the "prev" marking information
781 virtual void verify() const;
782 };
783
784 // HeapRegionClosure is used for iterating over regions.
785 // Terminates the iteration when the "doHeapRegion" method returns "true".
786 class HeapRegionClosure : public StackObj {
787 friend class HeapRegionManager;
788 friend class G1CollectedHeap;
789
790 bool _complete;
791 void incomplete() { _complete = false; }
792
793 public:
794 HeapRegionClosure(): _complete(true) {}
795
796 // Typically called on each region until it returns true.
797 virtual bool doHeapRegion(HeapRegion* r) = 0;
798
799 // True after iteration if the closure was applied to all heap regions
800 // and returned "false" in all cases.
801 bool complete() { return _complete; }
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762 void print() const;
763 void print_on(outputStream* st) const;
764
765 // vo == UsePrevMarking -> use "prev" marking information,
766 // vo == UseNextMarking -> use "next" marking information
767 // vo == UseMarkWord -> use the mark word in the object header
768 //
769 // NOTE: Only the "prev" marking information is guaranteed to be
770 // consistent most of the time, so most calls to this should use
771 // vo == UsePrevMarking.
772 // Currently, there is only one case where this is called with
773 // vo == UseNextMarking, which is to verify the "next" marking
774 // information at the end of remark.
775 // Currently there is only one place where this is called with
776 // vo == UseMarkWord, which is to verify the marking during a
777 // full GC.
778 void verify(VerifyOption vo, bool *failures) const;
779
780 // Override; it uses the "prev" marking information
781 virtual void verify() const;
782
783 void verify_rem_set(VerifyOption vo, bool *failures) const;
784 void verify_rem_set() const;
785 };
786
787 // HeapRegionClosure is used for iterating over regions.
788 // Terminates the iteration when the "doHeapRegion" method returns "true".
789 class HeapRegionClosure : public StackObj {
790 friend class HeapRegionManager;
791 friend class G1CollectedHeap;
792
793 bool _complete;
794 void incomplete() { _complete = false; }
795
796 public:
797 HeapRegionClosure(): _complete(true) {}
798
799 // Typically called on each region until it returns true.
800 virtual bool doHeapRegion(HeapRegion* r) = 0;
801
802 // True after iteration if the closure was applied to all heap regions
803 // and returned "false" in all cases.
804 bool complete() { return _complete; }
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