private static object ReadRawOperand(IBinaryStreamReader reader, CilOperandType cilOperandType)
{
switch (cilOperandType)
{
case CilOperandType.InlineNone:
return(null);
case CilOperandType.InlineArgument:
case CilOperandType.InlineVar:
return(reader.ReadUInt16());
case CilOperandType.InlineI:
case CilOperandType.InlineBrTarget:
return(reader.ReadInt32());
case CilOperandType.ShortInlineArgument:
case CilOperandType.ShortInlineVar:
return(reader.ReadByte());
case CilOperandType.ShortInlineBrTarget:
case CilOperandType.ShortInlineI:
return(reader.ReadSByte());
case CilOperandType.ShortInlineR:
return(reader.ReadSingle());
case CilOperandType.InlineR:
return(reader.ReadDouble());
case CilOperandType.InlineI8:
return(reader.ReadInt64());
case CilOperandType.InlineField:
case CilOperandType.InlineMethod:
case CilOperandType.InlineSig:
case CilOperandType.InlineTok:
case CilOperandType.InlineType:
case CilOperandType.InlineString:
return(new MetadataToken(reader.ReadUInt32()));
case CilOperandType.InlineSwitch:
var offsets = new int[reader.ReadUInt32()];
for (int i = 0; i < offsets.Length; i++)
{
offsets[i] = reader.ReadInt32();
}
return(offsets);
}
throw new NotSupportedException();
}
private static object ReadRawOperand(IBinaryStreamReader reader, MsilOperandType msilOperandType)
{
switch (msilOperandType)
{
case MsilOperandType.InlineNone:
return null;
case MsilOperandType.InlineArgument:
case MsilOperandType.InlineVar:
return reader.ReadUInt16();
case MsilOperandType.InlineI:
case MsilOperandType.InlineBrTarget:
return reader.ReadInt32();
case MsilOperandType.ShortInlineArgument:
case MsilOperandType.ShortInlineVar:
return reader.ReadByte();
case MsilOperandType.ShortInlineBrTarget:
case MsilOperandType.ShortInlineI:
return reader.ReadSByte();
case MsilOperandType.ShortInlineR:
return reader.ReadSingle();
case MsilOperandType.InlineR:
return reader.ReadDouble();
case MsilOperandType.InlineI8:
return reader.ReadInt64();
case MsilOperandType.InlineField :
case MsilOperandType.InlineMethod :
case MsilOperandType.InlineSig:
case MsilOperandType.InlineTok:
case MsilOperandType.InlineType:
case MsilOperandType.InlineString:
return new MetadataToken(reader.ReadUInt32());
case MsilOperandType.InlineSwitch:
var offsets = new int[reader.ReadUInt32()];
for (int i = 0; i < offsets.Length; i++)
offsets[i] = reader.ReadInt32();
return offsets;
}
throw new NotSupportedException();
}
private static object ReadElement(IBinaryStreamReader reader, ElementType elementType)
{
switch (elementType)
{
case ElementType.I1:
return(reader.ReadSByte());
case ElementType.I2:
return(reader.ReadInt16());
case ElementType.I4:
return(reader.ReadInt32());
case ElementType.I8:
return(reader.ReadInt64());
case ElementType.U1:
return(reader.ReadByte());
case ElementType.U2:
return(reader.ReadUInt16());
case ElementType.U4:
return(reader.ReadUInt32());
case ElementType.U8:
return(reader.ReadUInt64());
case ElementType.R4:
return(reader.ReadSingle());
case ElementType.R8:
return(reader.ReadDouble());
}
ThrowUnsupportedElementType(elementType);
return(null);
}
/// <summary>
/// Reads a type signature from a blob reader.
/// </summary>
/// <param name="module">The module containing the blob signature.</param>
/// <param name="reader">The blob signature reader.</param>
/// <param name="protection">The object responsible for detecting infinite recursion.</param>
/// <returns>The type signature.</returns>
/// <exception cref="ArgumentOutOfRangeException">Occurs when the blob reader points to an element type that is
/// invalid or unsupported.</exception>
public static TypeSignature FromReader(ModuleDefinition module, IBinaryStreamReader reader,
RecursionProtection protection)
{
var elementType = (ElementType)reader.ReadByte();
switch (elementType)
{
case ElementType.Void:
case ElementType.Boolean:
case ElementType.Char:
case ElementType.I1:
case ElementType.U1:
case ElementType.I2:
case ElementType.U2:
case ElementType.I4:
case ElementType.U4:
case ElementType.I8:
case ElementType.U8:
case ElementType.R4:
case ElementType.R8:
case ElementType.String:
case ElementType.I:
case ElementType.U:
case ElementType.TypedByRef:
case ElementType.Object:
return(module.CorLibTypeFactory.FromElementType(elementType));
case ElementType.ValueType:
return(new TypeDefOrRefSignature(ReadTypeDefOrRef(module, reader, protection, false), true));
case ElementType.Class:
return(new TypeDefOrRefSignature(ReadTypeDefOrRef(module, reader, protection, false), false));
case ElementType.Ptr:
return(new PointerTypeSignature(FromReader(module, reader, protection)));
case ElementType.ByRef:
return(new ByReferenceTypeSignature(FromReader(module, reader, protection)));
case ElementType.Var:
return(new GenericParameterSignature(module, GenericParameterType.Type,
(int)reader.ReadCompressedUInt32()));
case ElementType.MVar:
return(new GenericParameterSignature(module, GenericParameterType.Method,
(int)reader.ReadCompressedUInt32()));
case ElementType.Array:
return(ArrayTypeSignature.FromReader(module, reader, protection));
case ElementType.GenericInst:
return(GenericInstanceTypeSignature.FromReader(module, reader, protection));
case ElementType.FnPtr:
throw new NotImplementedException();
case ElementType.SzArray:
return(new SzArrayTypeSignature(FromReader(module, reader, protection)));
case ElementType.CModReqD:
return(new CustomModifierTypeSignature(
ReadTypeDefOrRef(module, reader, protection, true),
true,
FromReader(module, reader, protection)));
case ElementType.CModOpt:
return(new CustomModifierTypeSignature(
ReadTypeDefOrRef(module, reader, protection, true),
false,
FromReader(module, reader, protection)));
case ElementType.Sentinel:
return(new SentinelTypeSignature());
case ElementType.Pinned:
return(new PinnedTypeSignature(FromReader(module, reader, protection)));
case ElementType.Boxed:
return(new BoxedTypeSignature(FromReader(module, reader, protection)));
case ElementType.Internal:
IntPtr address = IntPtr.Size switch
{
4 => new IntPtr(reader.ReadInt32()),
_ => new IntPtr(reader.ReadInt64())
};
//Get Internal Method Through Reflection
var GetTypeFromHandleUnsafeReflection = typeof(Type)
.GetMethod("GetTypeFromHandleUnsafe", ((BindingFlags)(-1)), null, new[] { typeof(IntPtr) },
null);
//Invoke It To Get The Value
var Type = (Type)GetTypeFromHandleUnsafeReflection?.Invoke(null, new object[] { address });
//Import it
return(new TypeDefOrRefSignature(new ReferenceImporter(module).ImportType((Type))));
default:
throw new ArgumentOutOfRangeException($"Invalid or unsupported element type {elementType}.");
}
}
private static object ReadValue(MetadataHeader header, TypeSignature typeSignature, IBinaryStreamReader reader)
{
switch (typeSignature.ElementType)
{
case ElementType.Boolean:
return(reader.ReadByte() == 1);
case ElementType.Char:
return((char)reader.ReadUInt16());
case ElementType.R4:
return(reader.ReadSingle());
case ElementType.R8:
return(reader.ReadDouble());
case ElementType.I1:
return(reader.ReadSByte());
case ElementType.I2:
return(reader.ReadInt16());
case ElementType.I4:
return(reader.ReadInt32());
case ElementType.I8:
return(reader.ReadInt64());
case ElementType.U1:
return(reader.ReadByte());
case ElementType.U2:
return(reader.ReadUInt16());
case ElementType.U4:
return(reader.ReadUInt32());
case ElementType.U8:
return(reader.ReadUInt64());
case ElementType.String:
return(reader.ReadSerString());
case ElementType.Object:
case ElementType.Class:
case ElementType.Enum:
case ElementType.ValueType:
var enumTypeDef = header.MetadataResolver.ResolveType(typeSignature);
if (enumTypeDef == null)
{
throw new MemberResolutionException(typeSignature);
}
if (enumTypeDef.IsEnum)
{
return(ReadValue(header, enumTypeDef.GetEnumUnderlyingType(), reader));
}
break;
}
if (typeSignature.IsTypeOf("System", "Type"))
{
return(reader.ReadSerString());
}
throw new NotSupportedException("Unsupported element type " + typeSignature.ElementType);
}
private static object ReadValue(ModuleDefinition parentModule, TypeSignature valueType, IBinaryStreamReader reader)
{
switch (valueType.ElementType)
{
case ElementType.Boolean:
return(reader.ReadByte() == 1);
case ElementType.Char:
return((char)reader.ReadUInt16());
case ElementType.R4:
return(reader.ReadSingle());
case ElementType.R8:
return(reader.ReadDouble());
case ElementType.I1:
return(reader.ReadSByte());
case ElementType.I2:
return(reader.ReadInt16());
case ElementType.I4:
return(reader.ReadInt32());
case ElementType.I8:
return(reader.ReadInt64());
case ElementType.U1:
return(reader.ReadByte());
case ElementType.U2:
return(reader.ReadUInt16());
case ElementType.U4:
return(reader.ReadUInt32());
case ElementType.U8:
return(reader.ReadUInt64());
case ElementType.String:
return(reader.ReadSerString());
case ElementType.Object:
return(ReadValue(parentModule, TypeSignature.ReadFieldOrPropType(parentModule, reader), reader));
case ElementType.Class:
case ElementType.Enum:
case ElementType.ValueType:
var enumTypeDef = parentModule.MetadataResolver.ResolveType(valueType);
if (enumTypeDef != null && enumTypeDef.IsEnum)
{
return(ReadValue(parentModule, enumTypeDef.GetEnumUnderlyingType(), reader));
}
break;
}
if (valueType.IsTypeOf("System", "Type"))
{
return(TypeNameParser.Parse(parentModule, reader.ReadSerString()));
}
throw new NotSupportedException($"Unsupported element type {valueType.ElementType}.");
}
private static object ReadValue(MetadataHeader header, TypeSignature typeSignature, IBinaryStreamReader reader)
{
switch (typeSignature.ElementType)
{
case ElementType.Boolean:
return reader.ReadByte() == 1;
case ElementType.Char:
return (char)reader.ReadUInt16();
case ElementType.R4:
return reader.ReadSingle();
case ElementType.R8:
return reader.ReadDouble();
case ElementType.I1:
return reader.ReadSByte();
case ElementType.I2:
return reader.ReadInt16();
case ElementType.I4:
return reader.ReadInt32();
case ElementType.I8:
return reader.ReadInt64();
case ElementType.U1:
return reader.ReadByte();
case ElementType.U2:
return reader.ReadUInt16();
case ElementType.U4:
return reader.ReadUInt32();
case ElementType.U8:
return reader.ReadUInt64();
case ElementType.String:
return reader.ReadSerString();
case ElementType.Object:
return ReadValue(header, TypeSignature.ReadFieldOrPropType(header, reader), reader);
case ElementType.Class:
case ElementType.Enum:
case ElementType.ValueType:
var enumTypeDef = header.MetadataResolver.ResolveType(typeSignature);
if (enumTypeDef == null)
throw new MemberResolutionException(typeSignature);
if (enumTypeDef.IsEnum)
return ReadValue(header, enumTypeDef.GetEnumUnderlyingType(), reader);
break;
}
if (typeSignature.IsTypeOf("System", "Type"))
return TypeSignature.FromAssemblyQualifiedName(header, reader.ReadSerString());
throw new NotSupportedException("Unsupported element type " + typeSignature.ElementType);
}
private object ReadOperand(CilOperandType operandType)
{
switch (operandType)
{
case CilOperandType.InlineNone:
return(null);
case CilOperandType.ShortInlineI:
return(_reader.ReadSByte());
case CilOperandType.ShortInlineBrTarget:
return(new CilOffsetLabel(_reader.ReadSByte() + (int)(_reader.Offset - _reader.StartOffset)));
case CilOperandType.ShortInlineVar:
byte shortLocalIndex = _reader.ReadByte();
return(_operandResolver?.ResolveLocalVariable(shortLocalIndex) ?? shortLocalIndex);
case CilOperandType.ShortInlineArgument:
byte shortArgIndex = _reader.ReadByte();
return(_operandResolver?.ResolveParameter(shortArgIndex) ?? shortArgIndex);
case CilOperandType.InlineVar:
ushort longLocalIndex = _reader.ReadUInt16();
return(_operandResolver?.ResolveLocalVariable(longLocalIndex) ?? longLocalIndex);
case CilOperandType.InlineArgument:
ushort longArgIndex = _reader.ReadUInt16();
return(_operandResolver?.ResolveParameter(longArgIndex) ?? longArgIndex);
case CilOperandType.InlineI:
return(_reader.ReadInt32());
case CilOperandType.InlineBrTarget:
return(new CilOffsetLabel(_reader.ReadInt32() + (int)(_reader.Offset - _reader.StartOffset)));
case CilOperandType.ShortInlineR:
return(_reader.ReadSingle());
case CilOperandType.InlineI8:
return(_reader.ReadInt64());
case CilOperandType.InlineR:
return(_reader.ReadDouble());
case CilOperandType.InlineString:
var stringToken = new MetadataToken(_reader.ReadUInt32());
return(_operandResolver?.ResolveString(stringToken) ?? stringToken);
case CilOperandType.InlineField:
case CilOperandType.InlineMethod:
case CilOperandType.InlineSig:
case CilOperandType.InlineTok:
case CilOperandType.InlineType:
var memberToken = new MetadataToken(_reader.ReadUInt32());
return(_operandResolver?.ResolveMember(memberToken) ?? memberToken);
case CilOperandType.InlinePhi:
throw new NotSupportedException();
case CilOperandType.InlineSwitch:
return(ReadSwitchTable());
default:
throw new ArgumentOutOfRangeException(nameof(operandType), operandType, null);
}
}
public void ReadValue(TypeSignature valueType)
{
if (valueType.IsTypeOf("System", "Type"))
{
Elements.Add(TypeNameParser.Parse(_parentModule, _reader.ReadSerString()));
return;
}
switch (valueType.ElementType)
{
case ElementType.Boolean:
Elements.Add(_reader.ReadByte() == 1);
break;
case ElementType.Char:
Elements.Add((char)_reader.ReadUInt16());
break;
case ElementType.R4:
Elements.Add(_reader.ReadSingle());
break;
case ElementType.R8:
Elements.Add(_reader.ReadDouble());
break;
case ElementType.I1:
Elements.Add(_reader.ReadSByte());
break;
case ElementType.I2:
Elements.Add(_reader.ReadInt16());
break;
case ElementType.I4:
Elements.Add(_reader.ReadInt32());
break;
case ElementType.I8:
Elements.Add(_reader.ReadInt64());
break;
case ElementType.U1:
Elements.Add(_reader.ReadByte());
break;
case ElementType.U2:
Elements.Add(_reader.ReadUInt16());
break;
case ElementType.U4:
Elements.Add(_reader.ReadUInt32());
break;
case ElementType.U8:
Elements.Add(_reader.ReadUInt64());
break;
case ElementType.String:
Elements.Add(_reader.ReadSerString());
break;
case ElementType.Object:
var reader = new CustomAttributeArgumentReader(_parentModule, _reader);
var type = TypeSignature.ReadFieldOrPropType(_parentModule, _reader);
reader.ReadValue(type);
Elements.Add(new BoxedArgument(type, type.ElementType == ElementType.SzArray
? reader.Elements.ToArray()
: reader.Elements[0]));
break;
case ElementType.SzArray:
var arrayElementType = ((SzArrayTypeSignature)valueType).BaseType;
uint elementCount = _reader.CanRead(sizeof(uint)) ? _reader.ReadUInt32() : uint.MaxValue;
IsNullArray = elementCount == uint.MaxValue;
if (!IsNullArray)
{
for (uint i = 0; i < elementCount; i++)
{
ReadValue(arrayElementType);
}
}
break;
case ElementType.Class:
case ElementType.Enum:
case ElementType.ValueType:
// Value is an enum, resolve it and get underlying type.
// If that fails, most enums are int32s, assume that is the case in an attempt to recover.
var enumTypeDef = _parentModule.MetadataResolver.ResolveType(valueType);
TypeSignature underlyingType;
if (enumTypeDef is null)
{
underlyingType = _parentModule.CorLibTypeFactory.Int32;
}
else if (enumTypeDef.IsEnum)
{
underlyingType = enumTypeDef.GetEnumUnderlyingType() ?? _parentModule.CorLibTypeFactory.Int32;
}
else
{
throw new NotSupportedException($"Type {valueType} is not an enum.");
}
ReadValue(underlyingType);
break;
default:
throw new NotSupportedException($"Unsupported element type {valueType.ElementType}.");
}
}
