110 lines
2.9 KiB
JavaScript
110 lines
2.9 KiB
JavaScript
/* -*- Mode: Javascript -*-
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* -*- coding: UTF-8 -*-
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* Copyright (C) 2011 by Artur Ventura
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*
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* File: cpu.js
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* Time-stamp: Fri Jul 15 02:46:27 2011
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*
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* Author: Artur Ventura
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*
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*/
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#import "opcodes.js"
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#define JVM_THROWS_NEW(exception) throw "VER: throws new exception"
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#ifdef DEBUG_INTRP
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#define LOG_INTRP(x) LOG(x)
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#else
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#define LOG_INTRP(x)
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#endif
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#define DEFOP(opcode) case opcode: LOG_INTRP("opcode pc: " + pc);
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#define ENDDEF break;
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function canonicalName(ref){
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return ref.str.replace(/\//g,".")
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}
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var JVM = function(params,args){
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this.nativeMappingTable = {}
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this.params = params;
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this.args = args;
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this.method_area = {};
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this.level = 0;
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this.classpath = params.classes_to_load;
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this.classForName = function (name){
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if (!name) { PANIC("undefined className")}
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var superClass, loaded_class = this.method_area[name];
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if (!loaded_class){
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loaded_class = LoadClassFile(name, this);
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this.method_area[name] = loaded_class;
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this.verifyAndLoadClass(loaded_class);
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LOG("[Loaded " + name + "]");
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}
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return loaded_class;
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}
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this.verifyAndLoadClass = function(loaded_class){
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var superClass;
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if(loaded_class.super_class){
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// if super_class not java.lang.Object
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superClass = canonicalName(loaded_class.super_class.name_ref);
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loaded_class.super_class_ref = this.classForName(superClass);
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}
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// this doesn't seem right. doing this will cause the entire JRE to be loaded
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// as soon as you start JVM.
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/*
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var that = this;
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loaded_class.constantPool.each(function(constant){
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if (constant.name_ref.str.charAt(0) == "[") {
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return;
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}
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that.verifyAndLoadClass(canonicalName(constant.name_ref));
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}, CONSTANT_Class);*/
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};
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this.run = function (){
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this.java_lang_object = this.classForName("java.lang.Object");
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this.java_lang_cloneable = this.classForName("java.lang.Cloneable");
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this.java_io_serializable = this.classForName("java.io.Serializable");
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this.mainClass = this.args[0];
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this.classForName(this.mainClass).makeInstance();
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};
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};
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var JVMThread = function(){
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this.pc = null;
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this.stack = [];
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}
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var JVMFrame = function(){
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this.local_variables = [];
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this.operand_stack = [];
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}
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function JVMPanic(message){
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this.toString = function(){
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return "JVMPanic: " + message
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}
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};
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#define PANIC(msg) throw new JVMPanic(msg)
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function interpret(frame){
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var operand_stack = frame.operand_stack;
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var local_variables = frame.local_variables;
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var code = 0; //resolve code from method;
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switch(opcode){
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#include "intrp.js"
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}
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} |