Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/runtime/BasicObjectLock.java @ 7353:b5280041f59e
Experiment with soft alignment for branch targets.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sun, 13 Jan 2013 19:32:16 +0100 |
parents | c18cbe5936b8 |
children |
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/* * 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; } }