/// <summary>
/// Create a Dynamic Method Definition
/// </summary>
/// <param name="module">Target Module</param>
/// <param name="dynamicMethodObj">Dynamic Method / Delegate / DynamicResolver</param>
public DynamicMethodDefinition(ModuleDefinition module, object dynamicMethodObj) :
base(new MetadataToken(TableIndex.Method, 0))
{
dynamicMethodObj = DynamicMethodHelper.ResolveDynamicResolver(dynamicMethodObj);
var methodBase = FieldReader.ReadField <MethodBase>(dynamicMethodObj, "m_method");
Module = module;
Name = methodBase.Name;
Attributes = (MethodAttributes)methodBase.Attributes;
Signature = new ReferenceImporter(module).ImportMethodSignature(ResolveSig(methodBase, module));
CilMethodBody = CilMethodBody.FromDynamicMethod(this, dynamicMethodObj);
}
/// <summary>
/// Defines a new .NET module.
/// </summary>
/// <param name="name">The name of the module.</param>
/// <param name="corLib">The reference to the common object runtime (COR) library that this module will use.</param>
public ModuleDefinition(string name, AssemblyReference corLib)
: this(new MetadataToken(TableIndex.Module, 0))
{
Name = name;
var importer = new ReferenceImporter(this);
corLib = (AssemblyReference)importer.ImportScope(corLib);
CorLibTypeFactory = new CorLibTypeFactory(corLib);
AssemblyReferences.Add(corLib);
OriginalTargetRuntime = DetectTargetRuntime();
MetadataResolver = new DefaultMetadataResolver(CreateAssemblyResolver());
TopLevelTypes.Add(new TypeDefinition(null, "<Module>", 0));
}
private MethodSignature ResolveSig(MethodBase methodBase, ModuleDefinition module)
{
var imp = new ReferenceImporter(module);
var returnType = methodBase is MethodInfo info
? imp.ImportTypeSignature(info.ReturnType)
: module.CorLibTypeFactory.Void;
var parameters = methodBase.GetParameters();
var parameterTypes = new TypeSignature[parameters.Length];
for (int i = 0; i < parameterTypes.Length; i++)
{
parameterTypes[i] = imp.ImportTypeSignature(parameters[i].ParameterType);
}
return(new MethodSignature(
methodBase.IsStatic ? 0 : CallingConventionAttributes.HasThis,
returnType, parameterTypes));
}
private static void InterpretEHInfo(CilMethodBody methodBody, ReferenceImporter importer, object ehInfo)
{
for (int i = 0; i < FieldReader.ReadField <int>(ehInfo, "m_currentCatch"); i++)
{
// Get ExceptionHandlerInfo Field Values
var endFinally = FieldReader.ReadField <int>(ehInfo, "m_endFinally");
var instructions = methodBody.Instructions;
var endFinallyLabel = endFinally >= 0
? instructions.GetByOffset(endFinally)?.CreateLabel() ?? new CilOffsetLabel(endFinally)
: null;
int tryStart = FieldReader.ReadField <int>(ehInfo, "m_startAddr");
int tryEnd = FieldReader.ReadField <int>(ehInfo, "m_endAddr");
int handlerStart = FieldReader.ReadField <int[]>(ehInfo, "m_catchAddr")[i];
int handlerEnd = FieldReader.ReadField <int[]>(ehInfo, "m_catchEndAddr")[i];
var exceptionType = FieldReader.ReadField <Type[]>(ehInfo, "m_catchClass")[i];
var handlerType = (CilExceptionHandlerType)FieldReader.ReadField <int[]>(ehInfo, "m_type")[i];
var endTryLabel = instructions.GetByOffset(tryEnd)?.CreateLabel() ?? new CilOffsetLabel(tryEnd);
// Create the handler
var handler = new CilExceptionHandler
{
HandlerType = handlerType,
TryStart = instructions.GetLabel(tryStart),
TryEnd = handlerType == CilExceptionHandlerType.Finally ? endFinallyLabel : endTryLabel,
FilterStart = null,
HandlerStart = instructions.GetLabel(handlerStart),
HandlerEnd = instructions.GetLabel(handlerEnd),
ExceptionType = exceptionType != null?importer.ImportType(exceptionType) : null
};
methodBody.ExceptionHandlers.Add(handler);
}
}
public static object ResolveOperandReflection(ModuleReaderContext context, CilMethodBody methodBody, CilInstruction instruction,
ICilOperandResolver resolver, List <object> tokens, ReferenceImporter importer)
{
switch (instruction.OpCode.OperandType)
{
case CilOperandType.InlineBrTarget:
case CilOperandType.ShortInlineBrTarget:
return(methodBody.Instructions
.GetByOffset(((ICilLabel)instruction.Operand).Offset)
?.CreateLabel());
case CilOperandType.InlineField:
case CilOperandType.InlineMethod:
case CilOperandType.InlineSig:
case CilOperandType.InlineTok:
case CilOperandType.InlineType:
return(ReadToken(context, ((MetadataToken)instruction.Operand).ToUInt32(), tokens, importer));
case CilOperandType.InlineString:
return(ReadToken(context, ((MetadataToken)instruction.Operand).ToUInt32(), tokens, importer));
case CilOperandType.InlineSwitch:
var result = new List <ICilLabel>();
var labels = (IList <ICilLabel>)instruction.Operand;
for (int i = 0; i < labels.Count; i++)
{
var label = labels[i];
var target = methodBody.Instructions.GetByOffset(label.Offset);
result.Add(target != null
? new CilInstructionLabel(target)
: label);
}
return(result);
case CilOperandType.InlineVar:
case CilOperandType.ShortInlineVar:
return(resolver.ResolveLocalVariable(Convert.ToInt32(instruction.Operand)));
case CilOperandType.InlineArgument:
case CilOperandType.ShortInlineArgument:
return(resolver.ResolveParameter(Convert.ToInt32(instruction.Operand)));
case CilOperandType.InlineI:
case CilOperandType.InlineI8:
case CilOperandType.InlineNone:
case CilOperandType.InlineR:
case CilOperandType.ShortInlineI:
case CilOperandType.ShortInlineR:
return(instruction.Operand);
case CilOperandType.InlinePhi:
throw new NotSupportedException();
default:
throw new ArgumentOutOfRangeException();
}
}
public static void ReadReflectionExceptionHandlers(CilMethodBody methodBody,
IList <object> ehInfos, byte[] ehHeader, ReferenceImporter importer)
{
//Sample needed!
if (ehHeader != null && ehHeader.Length > 4)
{
throw new NotImplementedException("Exception handlers from ehHeader not supported yet.");
}
if (ehInfos != null && ehInfos.Count > 0)
{
foreach (var ehInfo in ehInfos)
{
InterpretEHInfo(methodBody, importer, ehInfo);
}
}
}
private static object ReadToken(ModuleReaderContext readerContext, MetadataToken token, IList <object> tokens, ReferenceImporter importer)
{
switch (token.Table)
{
case TableIndex.TypeDef:
var type = tokens[(int)token.Rid];
if (type is RuntimeTypeHandle runtimeTypeHandle)
{
return(importer.ImportType(Type.GetTypeFromHandle(runtimeTypeHandle)));
}
break;
case TableIndex.Field:
var field = tokens[(int)token.Rid];
if (field is null)
{
return(null);
}
if (field is RuntimeFieldHandle runtimeFieldHandle)
{
return(importer.ImportField(FieldInfo.GetFieldFromHandle(runtimeFieldHandle)));
}
if (field.GetType().FullName == "System.Reflection.Emit.GenericFieldInfo")
{
var result = FieldReader.TryReadField <RuntimeFieldHandle>(field, "m_field", out var mField);
var ctx = FieldReader.ReadField <RuntimeTypeHandle>(field, "m_context");
return(importer.ImportField(FieldInfo.GetFieldFromHandle(result
? mField
: FieldReader.ReadField <RuntimeFieldHandle>(field, "m_fieldHandle"), ctx)));
}
break;
case TableIndex.Method:
case TableIndex.MemberRef:
var obj = tokens[(int)token.Rid];
if (obj is RuntimeMethodHandle methodHandle)
{
return(importer.ImportMethod(MethodBase.GetMethodFromHandle(methodHandle)));
}
if (obj.GetType().FullName == "System.Reflection.Emit.GenericMethodInfo")
{
var context =
FieldReader.ReadField <RuntimeTypeHandle>(obj, "m_context");
var res = FieldReader.TryReadField <RuntimeMethodHandle>(obj, "m_method", out var m_method);
var m_handle = FieldReader.ReadField <RuntimeMethodHandle>(obj, "m_methodHandle");
var method = MethodBase.GetMethodFromHandle(
res
? m_method
: m_handle, context);
return(importer.ImportMethod(method));
}
if (obj.GetType().FullName == "System.Reflection.Emit.VarArgMethod")
{
return(importer.ImportMethod(FieldReader.ReadField <MethodInfo>(obj, "m_method")));
}
break;
case TableIndex.StandAloneSig:
return(CallingConventionSignature.FromReader(
new BlobReadContext(readerContext),
new ByteArrayReader((byte[])tokens[(int)token.Rid])));
case (TableIndex)112:
return(tokens[(int)token.Rid] as string);
}
return(null);
}
public static object ResolveOperandReflection(this CilMethodBody methodBody, CilInstruction instruction,
ICilOperandResolver resolver, List <object> Tokens, ReferenceImporter Importer)
{
switch (instruction.OpCode.OperandType)
{
case CilOperandType.InlineBrTarget:
case CilOperandType.ShortInlineBrTarget:
return(new CilInstructionLabel(
methodBody.Instructions.GetByOffset(((ICilLabel)instruction.Operand).Offset)));
case CilOperandType.InlineField:
case CilOperandType.InlineMethod:
case CilOperandType.InlineSig:
case CilOperandType.InlineTok:
case CilOperandType.InlineType:
return(ReadToken(((MetadataToken)instruction.Operand).ToUInt32(), Tokens, Importer));
case CilOperandType.InlineString:
return(ReadToken(((MetadataToken)instruction.Operand).ToUInt32(), Tokens, Importer));
case CilOperandType.InlineSwitch:
var result = new List <ICilLabel>();
var labels = (IEnumerable <ICilLabel>)instruction.Operand;
foreach (var label in labels)
{
var target = methodBody.Instructions.GetByOffset(label.Offset);
result.Add(target == null ? label : new CilInstructionLabel(target));
}
return(result);
case CilOperandType.InlineVar:
case CilOperandType.ShortInlineVar:
return(resolver.ResolveLocalVariable(Convert.ToInt32(instruction.Operand)));
case CilOperandType.InlineArgument:
case CilOperandType.ShortInlineArgument:
return(resolver.ResolveParameter(Convert.ToInt32(instruction.Operand)));
case CilOperandType.InlineI:
case CilOperandType.InlineI8:
case CilOperandType.InlineNone:
case CilOperandType.InlineR:
case CilOperandType.ShortInlineI:
case CilOperandType.ShortInlineR:
return(instruction.Operand);
case CilOperandType.InlinePhi:
throw new NotSupportedException();
default:
throw new ArgumentOutOfRangeException();
}
}
public static void ReadReflectionExceptionHandlers(this CilMethodBody methodBody,
IList <object> ehInfos, byte[] ehHeader, ReferenceImporter importer)
{
if (ehHeader != null && ehHeader.Length > 4)
{
//Sample needed!
throw new NotImplementedException("Exception Handlers From ehHeader Not Supported Yet.");
}
if (ehInfos != null && ehInfos.Count > 0)
{
foreach (var ehInfo in ehInfos)
{
for (int i = 0; i < FieldReader.ReadField <int>(ehInfo, "m_currentCatch"); i++)
{
//Get ExceptionHandlerInfo Field Values
var endFinally = FieldReader.ReadField <int>(ehInfo, "m_endFinally");
var endFinallyLabel = endFinally < 0
? null
: methodBody.Instructions.GetByOffset(endFinally)?.CreateLabel() ??
new CilOffsetLabel(endFinally);
var endTry = FieldReader.ReadField <int>(ehInfo, "m_endAddr");
var endTryLabel = methodBody.Instructions.GetByOffset(endTry)?.CreateLabel() ??
new CilOffsetLabel(endTry);
var handlerEnd = FieldReader.ReadField <int[]>(ehInfo, "m_catchEndAddr")[i];
var exceptionType = FieldReader.ReadField <Type[]>(ehInfo, "m_catchClass")[i];
var handlerStart = FieldReader.ReadField <int[]>(ehInfo, "m_catchAddr")[i];
var tryStart = FieldReader.ReadField <int>(ehInfo, "m_startAddr");
var handlerType = (CilExceptionHandlerType)FieldReader.ReadField <int[]>(ehInfo, "m_type")[i];
//Create the handler
var handler = new CilExceptionHandler
{
HandlerType = handlerType,
TryStart = methodBody.Instructions.GetByOffset(tryStart)?.CreateLabel() ??
new CilOffsetLabel(tryStart),
TryEnd = handlerType == CilExceptionHandlerType.Finally ? endFinallyLabel : endTryLabel,
FilterStart = null,
HandlerStart = methodBody.Instructions.GetByOffset(handlerStart)?.CreateLabel() ??
new CilOffsetLabel(handlerStart),
HandlerEnd = methodBody.Instructions.GetByOffset(handlerEnd)?.CreateLabel() ??
new CilOffsetLabel(handlerEnd),
ExceptionType = exceptionType != null?importer.ImportType(exceptionType) : null
};
methodBody.ExceptionHandlers.Add(handler);
}
}
}
}
