--- old/agent/src/share/classes/sun/jvm/hotspot/code/RicochetBlob.java 2012-07-19 15:09:07.409502000 -0700 +++ /dev/null 2012-07-19 15:09:07.000000000 -0700 @@ -1,70 +0,0 @@ -/* - * Copyright (c) 2011, 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.code; - -import java.util.*; -import sun.jvm.hotspot.debugger.*; -import sun.jvm.hotspot.runtime.*; -import sun.jvm.hotspot.types.*; - -/** RicochetBlob (currently only used by Compiler 2) */ - -public class RicochetBlob extends SingletonBlob { - static { - VM.registerVMInitializedObserver(new Observer() { - public void update(Observable o, Object data) { - initialize(VM.getVM().getTypeDataBase()); - } - }); - } - - private static void initialize(TypeDataBase db) { - Type type = db.lookupType("RicochetBlob"); - - bounceOffsetField = type.getCIntegerField("_bounce_offset"); - exceptionOffsetField = type.getCIntegerField("_exception_offset"); - } - - private static CIntegerField bounceOffsetField; - private static CIntegerField exceptionOffsetField; - - public RicochetBlob(Address addr) { - super(addr); - } - - public boolean isRicochetBlob() { - return true; - } - - public Address bounceAddr() { - return codeBegin().addOffsetTo(bounceOffsetField.getValue(addr)); - } - - public boolean returnsToBounceAddr(Address pc) { - Address bouncePc = bounceAddr(); - return (pc.equals(bouncePc) || pc.addOffsetTo(Frame.pcReturnOffset()).equals(bouncePc)); - } - -}