477 lines
18 KiB
C#
477 lines
18 KiB
C#
using System;
|
|
using System.IO;
|
|
using System.Collections.Generic;
|
|
using System.Text;
|
|
using OpenSim.Scripting.EmbeddedJVM.Types;
|
|
|
|
namespace OpenSim.Scripting.EmbeddedJVM
|
|
{
|
|
public class ClassRecord
|
|
{
|
|
private ushort _majorVersion;
|
|
private ushort _minorVersion;
|
|
private ushort _constantPoolCount;
|
|
private ushort _accessFlags;
|
|
private ushort _thisClass;
|
|
private ushort _supperClass;
|
|
private ushort _interfaceCount;
|
|
private ushort _fieldCount;
|
|
private ushort _methodCount;
|
|
private ushort _attributeCount;
|
|
private string _name;
|
|
public Dictionary<string, BaseType> StaticFields = new Dictionary<string, BaseType>();
|
|
public PoolClass mClass;
|
|
|
|
public List<PoolItem> _constantsPool = new List<PoolItem>();
|
|
private List<MethodInfo> _methodsList = new List<MethodInfo>();
|
|
private List<FieldInfo> _fieldList = new List<FieldInfo>();
|
|
|
|
public ClassRecord()
|
|
{
|
|
|
|
}
|
|
|
|
public ClassInstance CreateNewInstance()
|
|
{
|
|
return new ClassInstance();
|
|
}
|
|
|
|
public void LoadClassFromFile(string fileName)
|
|
{
|
|
Console.WriteLine("loading script " + fileName);
|
|
FileStream fs = File.OpenRead(fileName);
|
|
this.LoadClassFromBytes(ReadFully(fs));
|
|
fs.Close();
|
|
}
|
|
|
|
public void LoadClassFromBytes(byte[] data)
|
|
{
|
|
int i = 0;
|
|
i += 4;
|
|
_minorVersion = (ushort)((data[i++] << 8) + data[i++] );
|
|
_majorVersion = (ushort)((data[i++] << 8) + data[i++] );
|
|
_constantPoolCount = (ushort)((data[i++] << 8) + data[i++] );
|
|
// Console.WriteLine("there should be " + _constantPoolCount + " items in the pool");
|
|
for (int count = 0; count < _constantPoolCount -1 ; count++)
|
|
{
|
|
//read in the constant pool
|
|
byte pooltype = data[i++];
|
|
//Console.WriteLine("#" +count +": new constant type = " +pooltype);
|
|
//Console.WriteLine("start position is: " + i);
|
|
switch (pooltype)
|
|
{
|
|
case 1: //Utf8
|
|
ushort uLength = (ushort)((data[i++] << 8) + data[i++] );
|
|
|
|
// Console.WriteLine("new utf8 type, length is " + uLength);
|
|
PoolUtf8 utf8 = new PoolUtf8();
|
|
utf8.readValue(data, ref i, uLength);
|
|
this._constantsPool.Add(utf8);
|
|
break;
|
|
case 3: //Int
|
|
break;
|
|
case 7: //Class
|
|
PoolClass pClass = new PoolClass(this);
|
|
pClass.readValue(data, ref i);
|
|
this._constantsPool.Add(pClass);
|
|
break;
|
|
case 10: //Method
|
|
PoolMethodRef pMeth = new PoolMethodRef(this);
|
|
pMeth.readValue(data, ref i);
|
|
this._constantsPool.Add(pMeth);
|
|
break;
|
|
case 12: //NamedType
|
|
PoolNamedType pNamed = new PoolNamedType(this);
|
|
pNamed.readValue(data, ref i);
|
|
this._constantsPool.Add(pNamed);
|
|
break;
|
|
}
|
|
}
|
|
|
|
_accessFlags = (ushort)((data[i++] << 8) + data[i++] );
|
|
_thisClass = (ushort)((data[i++] << 8) + data[i++] );
|
|
_supperClass = (ushort)((data[i++] << 8) + data[i++] );
|
|
|
|
if (this._constantsPool[this._thisClass - 1] is PoolClass)
|
|
{
|
|
this.mClass = ((PoolClass)this._constantsPool[this._thisClass - 1]);
|
|
}
|
|
|
|
_interfaceCount = (ushort)((data[i++] << 8) + data[i++]);
|
|
//should now read in the info for each interface
|
|
_fieldCount = (ushort)((data[i++] << 8) + data[i++]);
|
|
//should now read in the info for each field
|
|
_methodCount = (ushort)((data[i++] << 8) + data[i++]);
|
|
for (int count = 0; count < _methodCount; count++)
|
|
{
|
|
MethodInfo methInf = new MethodInfo(this);
|
|
methInf.ReadData(data, ref i);
|
|
this._methodsList.Add(methInf);
|
|
}
|
|
}
|
|
|
|
public void AddMethodsToMemory(MethodMemory memory)
|
|
{
|
|
for (int count = 0; count < _methodCount; count++)
|
|
{
|
|
this._methodsList[count].AddMethodCode(memory);
|
|
}
|
|
}
|
|
|
|
public bool StartMethod(Thread thread, string methodName)
|
|
{
|
|
for (int count = 0; count < _methodCount; count++)
|
|
{
|
|
if (this._constantsPool[this._methodsList[count].NameIndex-1] is PoolUtf8)
|
|
{
|
|
if (((PoolUtf8)this._constantsPool[this._methodsList[count].NameIndex-1]).Value == methodName)
|
|
{
|
|
//Console.WriteLine("found method: " + ((PoolUtf8)this._constantsPool[this._methodsList[count].NameIndex - 1]).Value);
|
|
thread.SetPC(this._methodsList[count].CodePointer);
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
public void PrintToConsole()
|
|
{
|
|
Console.WriteLine("Class File:");
|
|
Console.WriteLine("Major version: " + _majorVersion);
|
|
Console.WriteLine("Minor version: " + _minorVersion);
|
|
Console.WriteLine("Pool size: " + _constantPoolCount);
|
|
|
|
for (int i = 0; i < _constantsPool.Count; i++)
|
|
{
|
|
this._constantsPool[i].Print();
|
|
}
|
|
|
|
Console.WriteLine("Access flags: " + _accessFlags);
|
|
Console.WriteLine("This class: " + _thisClass );
|
|
Console.WriteLine("Super class: " + _supperClass);
|
|
|
|
for (int count = 0; count < _methodCount; count++)
|
|
{
|
|
Console.WriteLine();
|
|
this._methodsList[count].Print();
|
|
}
|
|
|
|
Console.WriteLine("class name is " + this.mClass.Name.Value);
|
|
}
|
|
|
|
public static byte[] ReadFully(Stream stream)
|
|
{
|
|
byte[] buffer = new byte[1024];
|
|
using (MemoryStream ms = new MemoryStream())
|
|
{
|
|
while (true)
|
|
{
|
|
int read = stream.Read(buffer, 0, buffer.Length);
|
|
if (read <= 0)
|
|
return ms.ToArray();
|
|
ms.Write(buffer, 0, read);
|
|
}
|
|
}
|
|
}
|
|
|
|
#region nested classes
|
|
public class PoolItem
|
|
{
|
|
public virtual void Print()
|
|
{
|
|
|
|
}
|
|
}
|
|
|
|
public class PoolUtf8 : PoolItem
|
|
{
|
|
public string Value = "";
|
|
|
|
public void readValue(byte[] data,ref int pointer , int length)
|
|
{
|
|
for (int i = 0; i < length; i++)
|
|
{
|
|
int a =(int) data[pointer++];
|
|
if ((a & 0x80) == 0)
|
|
{
|
|
Value = Value + (char)a;
|
|
}
|
|
else if ((a & 0x20) == 0)
|
|
{
|
|
int b = (int) data[pointer++];
|
|
Value = Value + (char)(((a & 0x1f) << 6) + (b & 0x3f));
|
|
}
|
|
else
|
|
{
|
|
int b = (int)data[pointer++];
|
|
int c = (int)data[pointer++];
|
|
Value = Value + (char)(((a & 0xf) << 12) + ((b & 0x3f) << 6) + (c & 0x3f));
|
|
}
|
|
}
|
|
}
|
|
|
|
public override void Print()
|
|
{
|
|
Console.WriteLine("Utf8 type: " + Value);
|
|
}
|
|
}
|
|
|
|
private class PoolInt : PoolItem
|
|
{
|
|
|
|
}
|
|
|
|
public class PoolClass : PoolItem
|
|
{
|
|
//public string name = "";
|
|
public ushort namePointer = 0;
|
|
private ClassRecord parent;
|
|
public PoolUtf8 Name;
|
|
|
|
public PoolClass(ClassRecord paren)
|
|
{
|
|
parent = paren;
|
|
}
|
|
|
|
public void readValue(byte[] data, ref int pointer)
|
|
{
|
|
namePointer = (ushort)((data[pointer++] << 8) + data[pointer++] );
|
|
}
|
|
|
|
public override void Print()
|
|
{
|
|
this.Name = ((PoolUtf8)this.parent._constantsPool[namePointer - 1]);
|
|
Console.Write("Class type: " + namePointer);
|
|
Console.WriteLine(" // " + ((PoolUtf8)this.parent._constantsPool[namePointer - 1]).Value);
|
|
|
|
}
|
|
}
|
|
|
|
public class PoolMethodRef : PoolItem
|
|
{
|
|
public ushort classPointer = 0;
|
|
public ushort nameTypePointer = 0;
|
|
public PoolNamedType mNameType;
|
|
public PoolClass mClass;
|
|
private ClassRecord parent;
|
|
|
|
public PoolMethodRef(ClassRecord paren)
|
|
{
|
|
parent = paren;
|
|
}
|
|
|
|
public void readValue(byte[] data, ref int pointer)
|
|
{
|
|
classPointer = (ushort)((data[pointer++] << 8) + data[pointer++]);
|
|
nameTypePointer = (ushort)((data[pointer++] << 8) + data[pointer++]);
|
|
}
|
|
|
|
public override void Print()
|
|
{
|
|
this.mNameType = ((PoolNamedType)this.parent._constantsPool[nameTypePointer - 1]);
|
|
this.mClass = ((PoolClass)this.parent._constantsPool[classPointer - 1]);
|
|
Console.WriteLine("MethodRef type: " + classPointer + " , " + nameTypePointer);
|
|
}
|
|
}
|
|
|
|
public class PoolNamedType : PoolItem
|
|
{
|
|
public ushort namePointer = 0;
|
|
public ushort typePointer = 0;
|
|
private ClassRecord parent;
|
|
public PoolUtf8 Name;
|
|
public PoolUtf8 Type;
|
|
|
|
public PoolNamedType(ClassRecord paren)
|
|
{
|
|
parent = paren;
|
|
}
|
|
|
|
public void readValue(byte[] data, ref int pointer)
|
|
{
|
|
namePointer = (ushort)((data[pointer++] << 8) + data[pointer++] );
|
|
typePointer = (ushort)((data[pointer++] << 8) + data[pointer++] );
|
|
}
|
|
|
|
public override void Print()
|
|
{
|
|
Name = ((PoolUtf8)this.parent._constantsPool[namePointer-1]);
|
|
Type = ((PoolUtf8)this.parent._constantsPool[typePointer-1]);
|
|
Console.Write("Named type: " + namePointer + " , " + typePointer );
|
|
Console.WriteLine(" // "+ ((PoolUtf8)this.parent._constantsPool[namePointer-1]).Value);
|
|
}
|
|
}
|
|
|
|
//***********************
|
|
public class MethodInfo
|
|
{
|
|
public ushort AccessFlags = 0;
|
|
public ushort NameIndex = 0;
|
|
public string Name = "";
|
|
public ushort DescriptorIndex = 0;
|
|
public ushort AttributeCount = 0;
|
|
public List<MethodAttribute> Attributes = new List<MethodAttribute>();
|
|
private ClassRecord parent;
|
|
public int CodePointer = 0;
|
|
|
|
public MethodInfo(ClassRecord paren)
|
|
{
|
|
parent = paren;
|
|
}
|
|
|
|
public void AddMethodCode(MethodMemory memory)
|
|
{
|
|
Array.Copy(this.Attributes[0].Code, 0, memory.MethodBuffer, memory.NextMethodPC, this.Attributes[0].Code.Length);
|
|
memory.Methodcount++;
|
|
this.CodePointer = memory.NextMethodPC;
|
|
memory.NextMethodPC += this.Attributes[0].Code.Length;
|
|
}
|
|
|
|
public void ReadData(byte[] data, ref int pointer)
|
|
{
|
|
AccessFlags = (ushort)((data[pointer++] << 8) + data[pointer++]);
|
|
NameIndex = (ushort)((data[pointer++] << 8) + data[pointer++]);
|
|
DescriptorIndex = (ushort)((data[pointer++] << 8) + data[pointer++]);
|
|
AttributeCount = (ushort)((data[pointer++] << 8) + data[pointer++]);
|
|
for(int i =0; i< AttributeCount; i++)
|
|
{
|
|
MethodAttribute attri = new MethodAttribute(this.parent);
|
|
attri.ReadData(data, ref pointer);
|
|
this.Attributes.Add(attri);
|
|
}
|
|
}
|
|
|
|
public void Print()
|
|
{
|
|
Console.WriteLine("Method Info Struct: ");
|
|
Console.WriteLine("AccessFlags: " + AccessFlags);
|
|
Console.WriteLine("NameIndex: " + NameIndex +" // "+ ((PoolUtf8)this.parent._constantsPool[NameIndex-1]).Value);
|
|
Console.WriteLine("DescriptorIndex: " + DescriptorIndex + " // "+ ((PoolUtf8)this.parent._constantsPool[DescriptorIndex-1]).Value);
|
|
Console.WriteLine("Attribute Count:" + AttributeCount);
|
|
for (int i = 0; i < AttributeCount; i++)
|
|
{
|
|
this.Attributes[i].Print();
|
|
}
|
|
}
|
|
|
|
public class MethodAttribute
|
|
{
|
|
public ushort NameIndex = 0;
|
|
public string Name = "";
|
|
public Int32 Length = 0;
|
|
//for now only support code attribute
|
|
public ushort MaxStack = 0;
|
|
public ushort MaxLocals = 0;
|
|
public Int32 CodeLength = 0;
|
|
public byte[] Code;
|
|
public ushort ExceptionTableLength = 0;
|
|
public ushort SubAttributeCount = 0;
|
|
public List<SubAttribute> SubAttributes = new List<SubAttribute>();
|
|
private ClassRecord parent;
|
|
|
|
public MethodAttribute(ClassRecord paren)
|
|
{
|
|
parent = paren;
|
|
}
|
|
|
|
public void ReadData(byte[] data, ref int pointer)
|
|
{
|
|
NameIndex = (ushort)((data[pointer++] << 8) + data[pointer++]);
|
|
Length = (Int32)((data[pointer++] << 24) + (data[pointer++] << 16) + (data[pointer++] << 8) + data[pointer++]);
|
|
MaxStack = (ushort)((data[pointer++] << 8) + data[pointer++]);
|
|
MaxLocals = (ushort)((data[pointer++] << 8) + data[pointer++]);
|
|
CodeLength = (Int32)((data[pointer++] << 24) + (data[pointer++] << 16) + (data[pointer++] << 8) + data[pointer++]);
|
|
Code = new byte[CodeLength];
|
|
for (int i = 0; i < CodeLength; i++)
|
|
{
|
|
Code[i] = data[pointer++];
|
|
}
|
|
ExceptionTableLength = (ushort)((data[pointer++] << 8) + data[pointer++]);
|
|
SubAttributeCount = (ushort)((data[pointer++] << 8) + data[pointer++]);
|
|
for (int i = 0; i < SubAttributeCount; i++)
|
|
{
|
|
SubAttribute subAttri = new SubAttribute(this.parent);
|
|
subAttri.ReadData(data, ref pointer);
|
|
this.SubAttributes.Add(subAttri);
|
|
}
|
|
}
|
|
|
|
public void Print()
|
|
{
|
|
Console.WriteLine("Method Attribute: ");
|
|
Console.WriteLine("Name Index: " + NameIndex + " // "+ ((PoolUtf8)this.parent._constantsPool[NameIndex-1]).Value);
|
|
Console.WriteLine("Length: " + Length);
|
|
Console.WriteLine("MaxStack: " + MaxStack);
|
|
Console.WriteLine("MaxLocals: " + MaxLocals);
|
|
Console.WriteLine("CodeLength: " + CodeLength);
|
|
for (int i = 0; i < Code.Length; i++)
|
|
{
|
|
Console.WriteLine("OpCode #" + i + " is: " + Code[i]);
|
|
}
|
|
Console.WriteLine("SubAttributes: " + SubAttributeCount);
|
|
for (int i = 0; i < SubAttributeCount; i++)
|
|
{
|
|
this.SubAttributes[i].Print();
|
|
}
|
|
}
|
|
|
|
public class SubAttribute
|
|
{
|
|
public ushort NameIndex = 0;
|
|
public string Name = "";
|
|
public Int32 Length = 0;
|
|
public byte[] Data;
|
|
private ClassRecord parent;
|
|
|
|
public SubAttribute(ClassRecord paren)
|
|
{
|
|
parent = paren;
|
|
}
|
|
|
|
public void ReadData(byte[] data, ref int pointer)
|
|
{
|
|
NameIndex = (ushort)((data[pointer++] << 8) + data[pointer++]);
|
|
Length = (Int32)((data[pointer++] << 24) + (data[pointer++] << 16) + (data[pointer++] << 8) + data[pointer++]);
|
|
Data = new byte[Length];
|
|
for (int i = 0; i < Length; i++)
|
|
{
|
|
Data[i] = data[pointer++];
|
|
}
|
|
}
|
|
|
|
public void Print()
|
|
{
|
|
Console.WriteLine("SubAttribute: NameIndex: " + NameIndex + " // " + ((PoolUtf8)this.parent._constantsPool[NameIndex - 1]).Value);
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
}
|
|
private class InterfaceInfo
|
|
{
|
|
public void ReadData(byte[] data, ref int i)
|
|
{
|
|
|
|
}
|
|
}
|
|
private class FieldInfo
|
|
{
|
|
public void ReadData(byte[] data, ref int i)
|
|
{
|
|
|
|
}
|
|
}
|
|
private class AttributeInfo
|
|
{
|
|
public void ReadData(byte[] data, ref int i)
|
|
{
|
|
|
|
}
|
|
}
|
|
#endregion
|
|
|
|
}
|
|
}
|