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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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10
hotspot/src/share/vm/oops/oop.inline.hpp
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@ -148,12 +148,14 @@ inline bool oopDesc::is_null(narrowOop obj) { return obj == 0; }
inline narrowOop oopDesc::encode_heap_oop_not_null(oop v) {
assert(!is_null(v), "oop value can never be zero");
assert(Universe::heap()->is_in_reserved(v), "Address not in heap");
address base = Universe::narrow_oop_base();
int shift = Universe::narrow_oop_shift();
uint64_t pd = (uint64_t)(pointer_delta((void*)v, (void*)base, 1));
assert(OopEncodingHeapMax > pd, "change encoding max if new encoding");
uint64_t result = pd >> shift;
assert((result & CONST64(0xffffffff00000000)) == 0, "narrow oop overflow");
assert(decode_heap_oop(result) == v, "reversibility");
return (narrowOop)result;
}
@ -449,7 +451,7 @@ inline void update_barrier_set(void* p, oop v) {
oopDesc::bs()->write_ref_field(p, v);
}
inline void update_barrier_set_pre(void* p, oop v) {
template <class T> inline void update_barrier_set_pre(T* p, oop v) {
oopDesc::bs()->write_ref_field_pre(p, v);
}
@ -459,15 +461,15 @@ template <class T> inline void oop_store(T* p, oop v) {
} else {
update_barrier_set_pre(p, v);
oopDesc::encode_store_heap_oop(p, v);
update_barrier_set(p, v);
update_barrier_set((void*)p, v); // cast away type
}
}
template <class T> inline void oop_store(volatile T* p, oop v) {
update_barrier_set_pre((void*)p, v);
update_barrier_set_pre((T*)p, v); // cast away volatile
// Used by release_obj_field_put, so use release_store_ptr.
oopDesc::release_encode_store_heap_oop(p, v);
update_barrier_set((void*)p, v);
update_barrier_set((void*)p, v); // cast away type
}
template <class T> inline void oop_store_without_check(T* p, oop v) {