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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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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.*;
import sun.jvm.hotspot.utilities.Observable;
import sun.jvm.hotspot.utilities.Observer;

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.
/** 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 } }