Mercurial > hg > graal-jvmci-8
diff src/share/vm/memory/barrierSet.hpp @ 845:df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
Summary: Modifications to G1 so as to allow the use of compressed oops.
Reviewed-by: apetrusenko, coleenp, jmasa, kvn, never, phh, tonyp
author | ysr |
---|---|
date | Tue, 14 Jul 2009 15:40:39 -0700 |
parents | 1ee8caae33af |
children | 6aa7255741f3 |
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--- a/src/share/vm/memory/barrierSet.hpp Fri Jul 10 16:01:20 2009 -0700 +++ b/src/share/vm/memory/barrierSet.hpp Tue Jul 14 15:40:39 2009 -0700 @@ -81,9 +81,13 @@ // 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 @@ 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;