public void convert(MethodDef cilMethod, CsvmMethodData csvmMethod)
{
var newInstructions = readInstructions(cilMethod, csvmMethod);
var newLocals = readLocals(cilMethod, csvmMethod);
var newExceptions = readExceptions(cilMethod, csvmMethod, newInstructions);
fixInstructionOperands(newInstructions);
fixLocals(newInstructions, cilMethod.Body.Variables);
fixArgs(newInstructions, cilMethod);
DotNetUtils.restoreBody(cilMethod, newInstructions, newExceptions);
if (!operandRestorer.restore(cilMethod))
Logger.w("Failed to restore one or more instruction operands in CSVM method {0:X8}", cilMethod.MDToken.ToInt32());
restoreConstrainedPrefix(cilMethod);
}
public List<CsvmMethodData> Read() {
int numMethods = reader.ReadInt32();
if (numMethods < 0)
throw new ApplicationException("Invalid number of methods");
var methods = new List<CsvmMethodData>(numMethods);
for (int i = 0; i < numMethods; i++) {
var csvmMethod = new CsvmMethodData();
csvmMethod.Guid = new Guid(reader.ReadBytes(16));
csvmMethod.Token = reader.ReadInt32();
csvmMethod.Locals = reader.ReadBytes(reader.ReadInt32());
csvmMethod.Instructions = reader.ReadBytes(reader.ReadInt32());
csvmMethod.Exceptions = reader.ReadBytes(reader.ReadInt32());
methods.Add(csvmMethod);
}
return methods;
}
public void Convert(MethodDef cilMethod, CsvmMethodData csvmMethod)
{
cilToVmIndex.Clear();
vmIndexToCil.Clear();
var newInstructions = ReadInstructions(cilMethod, csvmMethod);
var newLocals = ReadLocals(cilMethod, csvmMethod);
var newExceptions = ReadExceptions(cilMethod, csvmMethod);
FixInstructionOperands(newInstructions);
FixLocals(newInstructions, cilMethod.Body.Variables);
FixArgs(newInstructions, cilMethod);
DotNetUtils.RestoreBody(cilMethod, newInstructions, newExceptions);
if (!operandRestorer.Restore(cilMethod))
{
Logger.w("Failed to restore one or more instruction operands in CSVM method {0:X8}", cilMethod.MDToken.ToInt32());
}
RestoreConstrainedPrefix(cilMethod);
}
List <ExceptionHandler> ReadExceptions(MethodDef cilMethod, CsvmMethodData csvmMethod)
{
var reader = new BinaryReader(new MemoryStream(csvmMethod.Exceptions));
var ehs = new List <ExceptionHandler>();
if (reader.BaseStream.Length == 0)
{
return(ehs);
}
int numExceptions = reader.ReadInt32();
if (numExceptions < 0)
{
throw new ApplicationException("Invalid number of exception handlers");
}
var gpContext = GenericParamContext.Create(cilMethod);
for (int i = 0; i < numExceptions; i++)
{
var eh = new ExceptionHandler((ExceptionHandlerType)reader.ReadInt32());
eh.TryStart = GetInstruction(reader.ReadInt32());
eh.TryEnd = GetInstructionEnd(reader.ReadInt32());
eh.HandlerStart = GetInstruction(reader.ReadInt32());
eh.HandlerEnd = GetInstructionEnd(reader.ReadInt32());
if (eh.HandlerType == ExceptionHandlerType.Catch)
{
eh.CatchType = module.ResolveToken(reader.ReadUInt32(), gpContext) as ITypeDefOrRef;
}
else if (eh.HandlerType == ExceptionHandlerType.Filter)
{
eh.FilterStart = GetInstruction(reader.ReadInt32());
}
ehs.Add(eh);
}
return(ehs);
}
public List <CsvmMethodData> read()
{
int numMethods = reader.ReadInt32();
if (numMethods < 0)
{
throw new ApplicationException("Invalid number of methods");
}
var methods = new List <CsvmMethodData>(numMethods);
for (int i = 0; i < numMethods; i++)
{
var csvmMethod = new CsvmMethodData();
csvmMethod.Guid = new Guid(reader.ReadBytes(16));
csvmMethod.Token = reader.ReadInt32();
csvmMethod.Locals = reader.ReadBytes(reader.ReadInt32());
csvmMethod.Instructions = reader.ReadBytes(reader.ReadInt32());
csvmMethod.Exceptions = reader.ReadBytes(reader.ReadInt32());
methods.Add(csvmMethod);
}
return(methods);
}
protected abstract List <Instruction> ReadInstructions(MethodDef cilMethod, CsvmMethodData csvmMethod);
protected abstract List<Instruction> ReadInstructions(MethodDef cilMethod, CsvmMethodData csvmMethod);
List<Local> ReadLocals(MethodDef cilMethod, CsvmMethodData csvmMethod)
{
var locals = new List<Local>();
var reader = new BinaryReader(new MemoryStream(csvmMethod.Locals));
if (csvmMethod.Locals.Length == 0)
return locals;
// v6.0.0.5 sometimes duplicates the last two locals so only check for a negative value.
int numLocals = reader.ReadInt32();
if (numLocals < 0)
throw new ApplicationException("Invalid number of locals");
var gpContext = GenericParamContext.Create(cilMethod);
for (int i = 0; i < numLocals; i++)
locals.Add(new Local(ReadTypeRef(reader, gpContext)));
return locals;
}
List<ExceptionHandler> ReadExceptions(MethodDef cilMethod, CsvmMethodData csvmMethod)
{
var reader = new BinaryReader(new MemoryStream(csvmMethod.Exceptions));
var ehs = new List<ExceptionHandler>();
if (reader.BaseStream.Length == 0)
return ehs;
int numExceptions = reader.ReadInt32();
if (numExceptions < 0)
throw new ApplicationException("Invalid number of exception handlers");
var gpContext = GenericParamContext.Create(cilMethod);
for (int i = 0; i < numExceptions; i++) {
var eh = new ExceptionHandler((ExceptionHandlerType)reader.ReadInt32());
eh.TryStart = GetInstruction(reader.ReadInt32());
eh.TryEnd = GetInstructionEnd(reader.ReadInt32());
eh.HandlerStart = GetInstruction(reader.ReadInt32());
eh.HandlerEnd = GetInstructionEnd(reader.ReadInt32());
if (eh.HandlerType == ExceptionHandlerType.Catch)
eh.CatchType = module.ResolveToken(reader.ReadUInt32(), gpContext) as ITypeDefOrRef;
else if (eh.HandlerType == ExceptionHandlerType.Filter)
eh.FilterStart = GetInstruction(reader.ReadInt32());
ehs.Add(eh);
}
return ehs;
}
List<Instruction> readInstructions(MethodDef cilMethod, CsvmMethodData csvmMethod)
{
var reader = new BinaryReader(new MemoryStream(csvmMethod.Instructions));
var instrs = new List<Instruction>();
uint offset = 0;
while (reader.BaseStream.Position < reader.BaseStream.Length) {
int vmOpCode = reader.ReadUInt16();
var instr = opCodeDetector.Handlers[vmOpCode].Read(reader);
instr.Offset = offset;
offset += (uint)getInstructionSize(instr);
instrs.Add(instr);
}
return instrs;
}
