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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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6
hotspot/src/share/vm/prims/unsafe.cpp
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@ -1048,7 +1048,11 @@ UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapObject(JNIEnv *env, jobject unsafe,
oop e = JNIHandles::resolve(e_h);
oop p = JNIHandles::resolve(obj);
HeapWord* addr = (HeapWord *)index_oop_from_field_offset_long(p, offset);
update_barrier_set_pre((void*)addr, e);
if (UseCompressedOops) {
update_barrier_set_pre((narrowOop*)addr, e);
} else {
update_barrier_set_pre((oop*)addr, e);
}
oop res = oopDesc::atomic_compare_exchange_oop(x, addr, e);
jboolean success = (res == e);
if (success)