public OopHandle getOopHandle(int x) { Address oopAddr = getOopHandleAddress(x); if (oopAddr != null) { return oopAddr.getOopHandleAt(0); } return null; }
public void visitAddress(Address addr) { Oop next = heap.newOop(addr.getOopHandleAt(0)); LivenessPathElement lp = new LivenessPathElement( null, new NamedFieldIdentifier(baseRootDescription + " @ " + addr)); rp.put(lp, next); markAndTraverse(next); }
/** Only returns addresses of valid OopHandles */ private Address getOopHandleAddress(int x) { if (Assert.ASSERTS_ENABLED) { Assert.that(x < top(), "out of bounds"); } Address oopAddr = addr.addOffsetTo(handlesField.getOffset() + x * VM.getVM().getOopSize()); OopHandle handle = oopAddr.getOopHandleAt(0); if (VM.getVM().getUniverse().isInReserved(handle) && !VM.getVM().getJNIHandles().isDeletedHandle(handle)) { /* the oop handle is valid only if it is not freed (i.e. reserved in heap) and is not a deleted oop */ return oopAddr; } else { return null; } }