| /* |
| * Copyright (c) 2000, 2004, 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.interpreter; |
| |
| import java.io.*; |
| import java.util.*; |
| |
| import sun.jvm.hotspot.code.*; |
| import sun.jvm.hotspot.debugger.*; |
| import sun.jvm.hotspot.runtime.*; |
| import sun.jvm.hotspot.types.*; |
| import sun.jvm.hotspot.utilities.*; |
| |
| /** An InterpreterCodelet is a piece of interpreter code. All |
| interpreter code is generated into little codelets which contain |
| extra information for debugging and printing purposes. */ |
| |
| public class InterpreterCodelet extends Stub { |
| private static long instanceSize; |
| private static CIntegerField sizeField; // the size in bytes |
| private static AddressField descriptionField; // a description of the codelet, for debugging & printing |
| private static CIntegerField bytecodeField; // associated bytecode if any |
| |
| static { |
| VM.registerVMInitializedObserver(new Observer() { |
| public void update(Observable o, Object data) { |
| initialize(VM.getVM().getTypeDataBase()); |
| } |
| }); |
| } |
| |
| private static synchronized void initialize(TypeDataBase db) { |
| Type type = db.lookupType("InterpreterCodelet"); |
| |
| sizeField = type.getCIntegerField("_size"); |
| descriptionField = type.getAddressField("_description"); |
| bytecodeField = type.getCIntegerField("_bytecode"); |
| |
| instanceSize = type.getSize(); |
| } |
| |
| public InterpreterCodelet(Address addr) { |
| super(addr); |
| } |
| |
| public long getSize() { |
| return sizeField.getValue(addr); |
| } |
| |
| public Address codeBegin() { |
| return addr.addOffsetTo(instanceSize); |
| } |
| |
| public Address codeEnd() { |
| return addr.addOffsetTo(getSize()); |
| } |
| |
| public long codeSize() { |
| return codeEnd().minus(codeBegin()); |
| } |
| |
| public String getDescription() { |
| return CStringUtilities.getString(descriptionField.getValue(addr)); |
| } |
| |
| public void verify() { |
| } |
| |
| public void printOn(PrintStream tty) { |
| String desc = getDescription(); |
| if (desc != null) { |
| tty.print(desc); |
| } |
| // FIXME: add printing of bytecode |
| tty.println(" [" + codeBegin() + ", " + codeEnd() + ") " + |
| codeSize() + " bytes "); |
| // FIXME: add disassembly |
| } |
| } |