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6672698: mangle_unused_area() should not remangle the entire heap at each collection

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Maintain a high water mark for the allocations in a space and mangle only up to that high water mark.

Reviewed-by: ysr, apetrusenko
This commit is contained in:
Jon Masamitsu 2008-07-09 15:08:55 -07:00
parent 0d9452401c
commit 18dbebd143
43 changed files with 1299 additions and 206 deletions
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6
hotspot/src/share/vm/utilities/globalDefinitions.hpp
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@ -97,8 +97,12 @@ const int SerializePageShiftCount = 3;
// object size.
class HeapWord {
friend class VMStructs;
private:
private:
char* i;
#ifdef ASSERT
public:
char* value() { return i; }
#endif
};
// HeapWordSize must be 2^LogHeapWordSize.