| /* |
| * Copyright (c) 2006, 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.*; |
| import sun.jvm.hotspot.utilities.*; |
| |
| public class VMRegImpl { |
| |
| private static VMReg stack0; |
| private static int stack0Val; |
| private static Address stack0Addr; |
| private static AddressField regNameField; |
| |
| 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("VMRegImpl"); |
| AddressField stack0Field = type.getAddressField("stack0"); |
| stack0Addr = stack0Field.getValue(); |
| stack0Val = (int) stack0Addr.hashCode(); |
| stack0 = new VMReg(stack0Val); |
| regNameField = type.getAddressField("regName[0]"); |
| } |
| |
| public static VMReg getStack0() { |
| return stack0; |
| } |
| |
| public static String getRegisterName(int index) { |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(index >= 0 && index < stack0Val, "invalid index : " + index); |
| } |
| Address regName = regNameField.getStaticFieldAddress(); |
| long addrSize = VM.getVM().getAddressSize(); |
| return CStringUtilities.getString(regName.getAddressAt(index * addrSize)); |
| } |
| } |