/// <summary>
/// Reads a single exception handler from the given input stream.
/// </summary>
/// <param name="cilMethodBody">The method body that contains the exception handler.</param>
/// <param name="reader">The input stream to read from.</param>
/// <param name="fatFormat">A value indicating whether the fat format or the small format should be used.</param>
/// <returns>The exception handler.</returns>
public static ExceptionHandler FromReader(CilMethodBody cilMethodBody, IBinaryStreamReader reader, bool fatFormat)
{
var handlerType = (ExceptionHandlerType)(fatFormat ? reader.ReadUInt32() : reader.ReadUInt16());
int tryOffset = fatFormat ? reader.ReadInt32() : reader.ReadUInt16();
int tryLength = fatFormat ? reader.ReadInt32() : reader.ReadByte();
int handlerOffset = fatFormat ? reader.ReadInt32() : reader.ReadUInt16();
int handlerLength = fatFormat ? reader.ReadInt32() : reader.ReadByte();
uint classTokenOrFilterOffset = reader.ReadUInt32();
var handler = new ExceptionHandler(handlerType)
{
IsFat = fatFormat,
TryStart = cilMethodBody.Instructions.GetByOffset(tryOffset),
TryEnd = cilMethodBody.Instructions.GetByOffset(tryOffset + tryLength),
HandlerStart = cilMethodBody.Instructions.GetByOffset(handlerOffset),
HandlerEnd = cilMethodBody.Instructions.GetByOffset(handlerOffset + handlerLength),
};
switch (handler.HandlerType)
{
case ExceptionHandlerType.Exception:
handler.CatchType = (ITypeDefOrRef)((IOperandResolver)cilMethodBody).ResolveMember(
new MetadataToken(classTokenOrFilterOffset));
break;
case ExceptionHandlerType.Filter:
handler.FilterStart = cilMethodBody.Instructions.GetByOffset((int)classTokenOrFilterOffset);
break;
}
return(handler);
}
public static ExceptionHandler FromReader(MethodBody methodBody, IBinaryStreamReader reader, bool fatFormat)
{
var offset = reader.Position;
var handerType = fatFormat ? reader.ReadUInt32() : reader.ReadUInt16();
var tryOffset = fatFormat ? reader.ReadInt32() : reader.ReadUInt16();
var tryLength = fatFormat ? reader.ReadInt32() : reader.ReadByte();
var handlerOffset = fatFormat ? reader.ReadInt32() : reader.ReadUInt16();
var handlerLength = fatFormat ? reader.ReadInt32() : reader.ReadByte();
var classTokenOrFilterOffset = reader.ReadUInt32();
var handler = new ExceptionHandler((ExceptionHandlerType)handerType)
{
StartOffset = offset,
IsFat = fatFormat,
MethodBody = methodBody,
TryStart = methodBody.GetInstructionByOffset(tryOffset),
TryEnd = methodBody.GetInstructionByOffset(tryOffset + tryLength),
HandlerStart = methodBody.GetInstructionByOffset(handlerOffset),
HandlerEnd = methodBody.GetInstructionByOffset(handlerOffset + handlerLength),
};
switch (handler.HandlerType)
{
case ExceptionHandlerType.Exception:
handler.CatchType = (ITypeDefOrRef)((IOperandResolver)methodBody).ResolveMember(new MetadataToken(classTokenOrFilterOffset));
break;
case ExceptionHandlerType.Filter:
handler.FilterStart = methodBody.GetInstructionByOffset((int)classTokenOrFilterOffset);
break;
}
return(handler);
}
/// <summary>
/// Reads a single exception handler from the provided input stream.
/// </summary>
/// <param name="body">The method body containing the exception handler.</param>
/// <param name="reader">The input stream.</param>
/// <param name="isFat"><c>true</c> if the fat format should be used, <c>false</c> otherwise.</param>
/// <returns>The exception handler.</returns>
public static CilExceptionHandler FromReader(CilMethodBody body, IBinaryStreamReader reader, bool isFat)
{
CilExceptionHandlerType handlerType;
int tryStartOffset;
int tryEndOffset;
int handlerStartOffset;
int handlerEndOffset;
// Read raw structure.
if (isFat)
{
handlerType = (CilExceptionHandlerType)reader.ReadUInt32();
tryStartOffset = reader.ReadInt32();
tryEndOffset = tryStartOffset + reader.ReadInt32();
handlerStartOffset = reader.ReadInt32();
handlerEndOffset = handlerStartOffset + reader.ReadInt32();
}
else
{
handlerType = (CilExceptionHandlerType)reader.ReadUInt16();
tryStartOffset = reader.ReadUInt16();
tryEndOffset = tryStartOffset + reader.ReadByte();
handlerStartOffset = reader.ReadUInt16();
handlerEndOffset = handlerStartOffset + reader.ReadByte();
}
int exceptionTokenOrFilterStart = reader.ReadInt32();
// Create handler.
var handler = new CilExceptionHandler
{
HandlerType = handlerType,
TryStart = body.Instructions.GetByOffset(tryStartOffset)?.CreateLabel() ??
new CilOffsetLabel(tryStartOffset),
TryEnd = body.Instructions.GetByOffset(tryEndOffset)?.CreateLabel() ?? new CilOffsetLabel(tryEndOffset),
HandlerStart = body.Instructions.GetByOffset(handlerStartOffset)?.CreateLabel() ??
new CilOffsetLabel(handlerStartOffset),
HandlerEnd = body.Instructions.GetByOffset(handlerEndOffset)?.CreateLabel() ??
new CilOffsetLabel(handlerEndOffset),
};
// Interpret last field.
switch (handler.HandlerType)
{
case CilExceptionHandlerType.Exception when body.Owner.Module.TryLookupMember(exceptionTokenOrFilterStart, out var member):
handler.ExceptionType = member as ITypeDefOrRef;
break;
case CilExceptionHandlerType.Filter:
handler.FilterStart = body.Instructions.GetByOffset(exceptionTokenOrFilterStart)?.CreateLabel()
?? new CilOffsetLabel(exceptionTokenOrFilterStart);
break;;
}
return(handler);
}
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();
}
public new static CilRawFatMethodBody FromReader(IBinaryStreamReader reader)
{
var body = new CilRawFatMethodBody
{
_header = reader.ReadUInt16(),
MaxStack = reader.ReadUInt16()
};
int codeSize = reader.ReadInt32();
body.LocalVarSigToken = reader.ReadUInt32();
body.Code = reader.ReadBytes(codeSize);
if (body.HasSections)
{
reader.Align(4);
CilExtraSection section;
do
{
section = CilExtraSection.FromReader(reader);
body.ExtraSections.Add(section);
} while (section.HasMoreSections);
}
return(body);
}
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 object ReadSignedImmediateData(X86OperandSize size)
{
switch (size)
{
case X86OperandSize.Byte:
return(_reader.ReadSByte());
case X86OperandSize.Word:
return(_reader.ReadInt16());
case X86OperandSize.Dword:
return(_reader.ReadInt32());
case X86OperandSize.WordOrDword:
return(_reader.ReadInt32()); // TODO: use operand-size override opcode
// TODO: fword
}
throw new NotSupportedException();
}
/// <summary>
/// Reads a metadata directory from an input stream.
/// </summary>
/// <param name="context">The reader context.</param>
/// <param name="directoryReader">The input stream containing the metadata directory.</param>
/// <exception cref="ArgumentNullException">Occurs when any of the arguments are <c>null</c>.</exception>
/// <exception cref="NotSupportedException">Occurs when an unsupported metadata directory format was encountered.</exception>
/// <exception cref="BadImageFormatException">Occurs when the metadata directory header is invalid.</exception>
public SerializedMetadata(PEReaderContext context, IBinaryStreamReader directoryReader)
{
if (directoryReader == null)
{
throw new ArgumentNullException(nameof(directoryReader));
}
_context = context ?? throw new ArgumentNullException(nameof(context));
_streamContentsReader = directoryReader.Fork();
var signature = (MetadataSignature)directoryReader.ReadUInt32();
switch (signature)
{
case MetadataSignature.Bsjb:
// BSJB header is the default header.
break;
case MetadataSignature.Moc:
_context.NotSupported("Old +MOC metadata header format is not supported.");
return;
default:
_context.BadImage($"Invalid metadata header ({(uint) signature:X8}).");
return;
}
MajorVersion = directoryReader.ReadUInt16();
MinorVersion = directoryReader.ReadUInt16();
Reserved = directoryReader.ReadUInt32();
int versionLength = directoryReader.ReadInt32();
if (!directoryReader.CanRead(versionLength))
{
_context.BadImage($"Invalid version length in metadata header ({versionLength.ToString()} characters).");
return;
}
var versionBytes = new byte[versionLength];
directoryReader.ReadBytes(versionBytes, 0, versionBytes.Length);
VersionString = Encoding.ASCII.GetString(versionBytes);
Flags = directoryReader.ReadUInt16();
_numberOfStreams = directoryReader.ReadInt16();
_streamEntriesReader = directoryReader.Fork();
}
/// <summary>
/// Reads a metadata directory from an input stream.
/// </summary>
/// <param name="reader">The input stream.</param>
/// <param name="metadataStreamReader"></param>
/// <exception cref="ArgumentNullException">Occurs when any of the arguments are <c>null</c>.</exception>
/// <exception cref="NotSupportedException">Occurs when an unsupported metadata directory format was encountered.</exception>
/// <exception cref="BadImageFormatException">Occurs when the metadata directory header is invalid.</exception>
public SerializedMetadata(IBinaryStreamReader reader, IMetadataStreamReader metadataStreamReader)
{
if (reader == null)
{
throw new ArgumentNullException(nameof(reader));
}
_metadataStreamReader = metadataStreamReader;
_streamContentsReader = reader.Fork();
var signature = (MetadataSignature)reader.ReadUInt32();
switch (signature)
{
case MetadataSignature.Bsjb:
// BSJB header is the default header.
break;
case MetadataSignature.Moc:
throw new NotSupportedException("Old +MOC metadata header format is not supported.");
default:
throw new BadImageFormatException($"Invalid metadata header ({(uint) signature:X8}).");
}
MajorVersion = reader.ReadUInt16();
MinorVersion = reader.ReadUInt16();
Reserved = reader.ReadUInt32();
int versionLength = reader.ReadInt32();
if (!reader.CanRead(versionLength))
{
throw new BadImageFormatException($"Invalid version length in metadata header ({versionLength} characters).");
}
var versionBytes = new byte[versionLength];
reader.ReadBytes(versionBytes, 0, versionBytes.Length);
VersionString = Encoding.ASCII.GetString(versionBytes);
Flags = reader.ReadUInt16();
_numberOfStreams = reader.ReadInt16();
_streamEntriesReader = reader.Fork();
}
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);
}
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);
}
public static ExceptionHandler FromReader(MethodBody methodBody, IBinaryStreamReader reader, bool fatFormat)
{
var offset = reader.Position;
var handerType = fatFormat ? reader.ReadUInt32() : reader.ReadUInt16();
var tryOffset = fatFormat ? reader.ReadInt32() : reader.ReadUInt16();
var tryLength = fatFormat ? reader.ReadInt32() : reader.ReadByte();
var handlerOffset = fatFormat ? reader.ReadInt32() : reader.ReadUInt16();
var handlerLength = fatFormat ? reader.ReadInt32() : reader.ReadByte();
var classTokenOrFilterOffset = reader.ReadUInt32();
var handler = new ExceptionHandler((ExceptionHandlerType)handerType)
{
StartOffset = offset,
IsFat = fatFormat,
TryStart = methodBody.GetInstructionByOffset(tryOffset),
TryEnd = methodBody.GetInstructionByOffset(tryOffset + tryLength),
HandlerStart = methodBody.GetInstructionByOffset(handlerOffset),
HandlerEnd = methodBody.GetInstructionByOffset(handlerOffset + handlerLength),
};
switch (handler.HandlerType)
{
case ExceptionHandlerType.Exception:
handler.CatchType = (ITypeDefOrRef)((IOperandResolver)methodBody).ResolveMember(new MetadataToken(classTokenOrFilterOffset));
break;
case ExceptionHandlerType.Filter:
handler.FilterStart = methodBody.GetInstructionByOffset((int)classTokenOrFilterOffset);
break;
}
return handler;
}
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);
}
}
/// <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}.");
}
}
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}.");
}
}
