734 void print() const;
735 void print_on(outputStream* st) const;
736
737 // vo == UsePrevMarking -> use "prev" marking information,
738 // vo == UseNextMarking -> use "next" marking information
739 // vo == UseMarkWord -> use the mark word in the object header
740 //
741 // NOTE: Only the "prev" marking information is guaranteed to be
742 // consistent most of the time, so most calls to this should use
743 // vo == UsePrevMarking.
744 // Currently, there is only one case where this is called with
745 // vo == UseNextMarking, which is to verify the "next" marking
746 // information at the end of remark.
747 // Currently there is only one place where this is called with
748 // vo == UseMarkWord, which is to verify the marking during a
749 // full GC.
750 void verify(VerifyOption vo, bool *failures) const;
751
752 // Override; it uses the "prev" marking information
753 virtual void verify() const;
754 };
755
756 // HeapRegionClosure is used for iterating over regions.
757 // Terminates the iteration when the "doHeapRegion" method returns "true".
758 class HeapRegionClosure : public StackObj {
759 friend class HeapRegionManager;
760 friend class G1CollectedHeap;
761
762 bool _complete;
763 void incomplete() { _complete = false; }
764
765 public:
766 HeapRegionClosure(): _complete(true) {}
767
768 // Typically called on each region until it returns true.
769 virtual bool doHeapRegion(HeapRegion* r) = 0;
770
771 // True after iteration if the closure was applied to all heap regions
772 // and returned "false" in all cases.
773 bool complete() { return _complete; }
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734 void print() const;
735 void print_on(outputStream* st) const;
736
737 // vo == UsePrevMarking -> use "prev" marking information,
738 // vo == UseNextMarking -> use "next" marking information
739 // vo == UseMarkWord -> use the mark word in the object header
740 //
741 // NOTE: Only the "prev" marking information is guaranteed to be
742 // consistent most of the time, so most calls to this should use
743 // vo == UsePrevMarking.
744 // Currently, there is only one case where this is called with
745 // vo == UseNextMarking, which is to verify the "next" marking
746 // information at the end of remark.
747 // Currently there is only one place where this is called with
748 // vo == UseMarkWord, which is to verify the marking during a
749 // full GC.
750 void verify(VerifyOption vo, bool *failures) const;
751
752 // Override; it uses the "prev" marking information
753 virtual void verify() const;
754
755 void verifyRSet(VerifyOption vo, bool *failures) const;
756 };
757
758 // HeapRegionClosure is used for iterating over regions.
759 // Terminates the iteration when the "doHeapRegion" method returns "true".
760 class HeapRegionClosure : public StackObj {
761 friend class HeapRegionManager;
762 friend class G1CollectedHeap;
763
764 bool _complete;
765 void incomplete() { _complete = false; }
766
767 public:
768 HeapRegionClosure(): _complete(true) {}
769
770 // Typically called on each region until it returns true.
771 virtual bool doHeapRegion(HeapRegion* r) = 0;
772
773 // True after iteration if the closure was applied to all heap regions
774 // and returned "false" in all cases.
775 bool complete() { return _complete; }
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