| /* |
| * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| package sun.jvm.hotspot.runtime; |
| |
| import java.util.*; |
| |
| import sun.jvm.hotspot.debugger.*; |
| import sun.jvm.hotspot.types.*; |
| |
| public class BasicObjectLock extends VMObject { |
| static { |
| VM.registerVMInitializedObserver(new Observer() { |
| public void update(Observable o, Object data) { |
| initialize(VM.getVM().getTypeDataBase()); |
| } |
| }); |
| } |
| |
| private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { |
| Type type = db.lookupType("BasicObjectLock"); |
| lockField = type.getField("_lock"); |
| objField = type.getOopField("_obj"); |
| size = (int) type.getSize(); |
| } |
| |
| private static sun.jvm.hotspot.types.Field lockField; |
| private static sun.jvm.hotspot.types.OopField objField; |
| private static int size; |
| |
| public BasicObjectLock(Address addr) { |
| super(addr); |
| } |
| |
| public OopHandle obj() { return objField.getValue(addr); } |
| public BasicLock lock() { return new BasicLock(addr.addOffsetTo(lockField.getOffset())); } |
| |
| /** Note: Use frame::interpreter_frame_monitor_size() for the size |
| of BasicObjectLocks in interpreter activation frames since it |
| includes machine-specific padding. This routine returns a size |
| in BYTES in this system! */ |
| public static int size() { return size; } |
| |
| /** Helper routine for Frames (also probably needed for iteration) */ |
| public Address address() { return addr; } |
| } |