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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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12
hotspot/src/share/vm/memory/genOopClosures.inline.hpp
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@ -40,18 +40,20 @@ inline void OopsInGenClosure::set_generation(Generation* gen) {
template <class T> inline void OopsInGenClosure::do_barrier(T* p) {
assert(generation()->is_in_reserved(p), "expected ref in generation");
assert(!oopDesc::is_null(*p), "expected non-null object");
oop obj = oopDesc::load_decode_heap_oop_not_null(p);
T heap_oop = oopDesc::load_heap_oop(p);
assert(!oopDesc::is_null(heap_oop), "expected non-null oop");
oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
// If p points to a younger generation, mark the card.
if ((HeapWord*)obj < _gen_boundary) {
_rs->inline_write_ref_field_gc(p, obj);
}
}
inline void OopsInGenClosure::par_do_barrier(oop* p) {
template <class T> inline void OopsInGenClosure::par_do_barrier(T* p) {
assert(generation()->is_in_reserved(p), "expected ref in generation");
oop obj = *p;
assert(obj != NULL, "expected non-null object");
T heap_oop = oopDesc::load_heap_oop(p);
assert(!oopDesc::is_null(heap_oop), "expected non-null oop");
oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
// If p points to a younger generation, mark the card.
if ((HeapWord*)obj < gen_boundary()) {
rs()->write_ref_field_gc_par(p, obj);