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6700789: G1: Enable use of compressed oops with G1 heaps

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Modifications to G1 so as to allow the use of compressed oops.

Reviewed-by: apetrusenko, coleenp, jmasa, kvn, never, phh, tonyp
This commit is contained in:
Y. Srinivas Ramakrishna 2009-07-14 15:40:39 -07:00
parent 50d7db1805
commit 075c1335cb
58 changed files with 1233 additions and 1175 deletions
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15
hotspot/src/share/vm/memory/barrierSet.hpp
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@ -81,9 +81,13 @@ public:
// barrier types. Semantically, it should be thought of as a call to the
// virtual "_work" function below, which must implement the barrier.)
// First the pre-write versions...
inline void write_ref_field_pre(void* field, oop new_val);
template <class T> inline void write_ref_field_pre(T* field, oop new_val);
private:
// Keep this private so as to catch violations at build time.
virtual void write_ref_field_pre_work( void* field, oop new_val) { guarantee(false, "Not needed"); };
protected:
virtual void write_ref_field_pre_work(void* field, oop new_val) {};
virtual void write_ref_field_pre_work( oop* field, oop new_val) {};
virtual void write_ref_field_pre_work(narrowOop* field, oop new_val) {};
public:
// ...then the post-write version.
@ -117,12 +121,17 @@ public:
virtual void read_ref_array(MemRegion mr) = 0;
virtual void read_prim_array(MemRegion mr) = 0;
virtual void write_ref_array_pre(MemRegion mr) {}
virtual void write_ref_array_pre( oop* dst, int length) {}
virtual void write_ref_array_pre(narrowOop* dst, int length) {}
inline void write_ref_array(MemRegion mr);
// Static versions, suitable for calling from generated code.
static void static_write_ref_array_pre(HeapWord* start, size_t count);
static void static_write_ref_array_post(HeapWord* start, size_t count);
// Narrow oop versions of the above; count is # of array elements being written,
// starting with "start", which is HeapWord-aligned.
static void static_write_ref_array_pre_narrow(HeapWord* start, size_t count);
static void static_write_ref_array_post_narrow(HeapWord* start, size_t count);
protected:
virtual void write_ref_array_work(MemRegion mr) = 0;