Mercurial > hg > truffle
diff agent/src/share/classes/sun/jvm/hotspot/runtime/BasicObjectLock.java @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/share/classes/sun/jvm/hotspot/runtime/BasicObjectLock.java Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,67 @@ +/* + * Copyright 2001 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.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; } +}