DmdCustomAttributeData[] Read(SecurityAction action)
{
try {
if (reader.Position >= reader.Length)
{
return(Array.Empty <DmdCustomAttributeData>());
}
if (reader.ReadByte() == '.')
{
return(ReadBinaryFormat(action));
}
reader.Position--;
return(ReadXmlFormat(action));
}
catch (TypeNameParserException) {
}
catch (CABlobParserException) {
}
catch (ResolveException) {
}
catch (IOException) {
}
return(Array.Empty <DmdCustomAttributeData>());
}
public static (DmdType fieldType, DmdMethodSignature methodSignature, bool containedGenericParams) ReadMethodSignatureOrFieldType(DmdModule module, DmdDataStream reader, IList <DmdType> genericTypeArguments, IList <DmdType> genericMethodArguments, bool resolve)
{
try {
using (var sigReader = new DmdSignatureReader(module, reader, genericTypeArguments, genericMethodArguments, resolve)) {
var flags = (DmdSignatureCallingConvention)reader.ReadByte();
if ((flags & DmdSignatureCallingConvention.Mask) == DmdSignatureCallingConvention.Field)
{
var fieldType = sigReader.ReadType().type;
return(fieldType, null, sigReader.containedGenericParams);
}
else
{
sigReader.ReadMethodSignature(flags, out var genericParameterCount, out var returnType, out var parameterTypes, out var varArgsParameterTypes);
if ((flags & DmdSignatureCallingConvention.Mask) != DmdSignatureCallingConvention.Property)
{
var methodSignature = new DmdMethodSignature(flags, genericParameterCount, returnType, parameterTypes, varArgsParameterTypes);
return(null, methodSignature, sigReader.containedGenericParams);
}
}
}
}
catch (IOException) {
}
catch (OutOfMemoryException) {
}
return(module.AppDomain.System_Void, null, false);
}
bool ReadHeader(out int localSignatureMetadataToken, out int maxStackSize, out bool initLocals, out int codeSize, out bool hasExceptionHandlers)
{
byte b = reader.ReadByte();
switch (b & 7)
{
case 2:
case 6:
localSignatureMetadataToken = 0;
maxStackSize = 8;
initLocals = false;
codeSize = b >> 2;
hasExceptionHandlers = false;
return(true);
case 3:
uint flags = (ushort)((reader.ReadByte() << 8) | b);
int headerSize = (int)(flags >> 12);
initLocals = (flags & 0x10) != 0;
maxStackSize = reader.ReadUInt16();
codeSize = reader.ReadInt32();
localSignatureMetadataToken = reader.ReadInt32();
hasExceptionHandlers = (flags & 8) != 0;
reader.Position += -12 + headerSize * 4;
if (headerSize < 3)
{
hasExceptionHandlers = false;
}
return(true);
default:
localSignatureMetadataToken = 0;
maxStackSize = 0;
initLocals = false;
codeSize = 0;
hasExceptionHandlers = false;
return(false);
}
}
DmdMarshalType Read()
{
const int DEFAULT = 0;
try {
var nativeType = (UnmanagedType)reader.ReadByte();
UnmanagedType nt;
int size;
switch (nativeType)
{
case UnmanagedType.ByValTStr:
size = CanRead ? (int)reader.ReadCompressedUInt32() : DEFAULT;
return(DmdMarshalType.CreateFixedSysString(size));
case UnmanagedType.SafeArray:
var vt = CanRead ? (VarEnum)reader.ReadCompressedUInt32() : DEFAULT;
var udtName = CanRead ? ReadUTF8String() : null;
var udtRef = udtName == null ? null : DmdTypeNameParser.Parse(module, udtName, genericTypeArguments);
return(DmdMarshalType.CreateSafeArray(vt, udtRef));
case UnmanagedType.ByValArray:
size = CanRead ? (int)reader.ReadCompressedUInt32() : DEFAULT;
nt = CanRead ? (UnmanagedType)reader.ReadCompressedUInt32() : DEFAULT;
return(DmdMarshalType.CreateFixedArray(size, nt));
case UnmanagedType.LPArray:
nt = CanRead ? (UnmanagedType)reader.ReadCompressedUInt32() : DEFAULT;
int paramNum = CanRead ? (int)reader.ReadCompressedUInt32() : DEFAULT;
size = CanRead ? (int)reader.ReadCompressedUInt32() : DEFAULT;
bool hasFlags = CanRead;
int flags = hasFlags ? (int)reader.ReadCompressedUInt32() : DEFAULT;
const int ntaSizeParamIndexSpecified = 1;
if (hasFlags && (flags & ntaSizeParamIndexSpecified) == 0)
{
paramNum = 0;
}
return(DmdMarshalType.CreateArray(nt, (short)paramNum, size));
case UnmanagedType.CustomMarshaler:
var guid = ReadUTF8String();
var nativeTypeName = ReadUTF8String();
var custMarshalerName = ReadUTF8String();
var cmRef = DmdTypeNameParser.Parse(module, custMarshalerName, genericTypeArguments);
var cookie = ReadUTF8String();
return(DmdMarshalType.CreateCustomMarshaler(custMarshalerName, cmRef, cookie));
case UnmanagedType.IUnknown:
case UnmanagedType.IDispatch:
case UnmanagedType.Interface:
int iidParamIndex = CanRead ? (int)reader.ReadCompressedUInt32() : DEFAULT;
return(DmdMarshalType.CreateInterface(nativeType, iidParamIndex));
default:
return(DmdMarshalType.Create(nativeType));
}
}
catch (ArgumentException) {
}
catch (IOException) {
}
return(null);
}
object ReadValue(SerializationType etype, DmdType argType, out DmdType realArgType) {
if (!IncrementRecursionCounter())
throw new CABlobParserException("Stack overflow");
object result;
switch (etype) {
case SerializationType.Boolean:
realArgType = module.AppDomain.System_Boolean;
result = reader.ReadByte() != 0;
break;
case SerializationType.Char:
realArgType = module.AppDomain.System_Char;
result = (char)reader.ReadUInt16();
break;
case SerializationType.I1:
realArgType = module.AppDomain.System_SByte;
result = reader.ReadSByte();
break;
case SerializationType.U1:
realArgType = module.AppDomain.System_Byte;
result = reader.ReadByte();
break;
case SerializationType.I2:
realArgType = module.AppDomain.System_Int16;
result = reader.ReadInt16();
break;
case SerializationType.U2:
realArgType = module.AppDomain.System_UInt16;
result = reader.ReadUInt16();
break;
case SerializationType.I4:
realArgType = module.AppDomain.System_Int32;
result = reader.ReadInt32();
break;
case SerializationType.U4:
realArgType = module.AppDomain.System_UInt32;
result = reader.ReadUInt32();
break;
case SerializationType.I8:
realArgType = module.AppDomain.System_Int64;
result = reader.ReadInt64();
break;
case SerializationType.U8:
realArgType = module.AppDomain.System_UInt64;
result = reader.ReadUInt64();
break;
case SerializationType.R4:
realArgType = module.AppDomain.System_Single;
result = reader.ReadSingle();
break;
case SerializationType.R8:
realArgType = module.AppDomain.System_Double;
result = reader.ReadDouble();
break;
case SerializationType.String:
realArgType = module.AppDomain.System_String;
result = ReadUTF8String();
break;
// It's ET.ValueType if it's eg. a ctor enum arg type
case (SerializationType)DMD.ElementType.ValueType:
if ((object)argType == null)
throw new CABlobParserException("Invalid element type");
realArgType = argType;
result = ReadEnumValue(GetEnumUnderlyingType(argType));
break;
// It's ET.Object if it's a ctor object arg type
case (SerializationType)DMD.ElementType.Object:
case SerializationType.TaggedObject:
realArgType = ReadFieldOrPropType();
if (realArgType.IsSZArray)
result = ReadArrayArgument(realArgType);
else
result = ReadValue(ToSerializationType(realArgType), realArgType, out var tmpType);
break;
// It's ET.Class if it's eg. a ctor System.Type arg type
case (SerializationType)DMD.ElementType.Class:
if (argType == module.AppDomain.System_Type) {
result = ReadValue(SerializationType.Type, argType, out realArgType);
break;
}
else if (argType == module.AppDomain.System_String) {
result = ReadValue(SerializationType.String, argType, out realArgType);
break;
}
else if (argType == module.AppDomain.System_Object) {
result = ReadValue(SerializationType.TaggedObject, argType, out realArgType);
break;
}
// Assume it's an enum that couldn't be resolved
realArgType = argType;
result = ReadEnumValue(null);
break;
case SerializationType.Type:
realArgType = argType;
result = ReadType(true);
break;
case SerializationType.Enum:
realArgType = ReadType(false);
result = ReadEnumValue(GetEnumUnderlyingType(realArgType));
break;
default:
throw new CABlobParserException("Invalid element type");
}
DecrementRecursionCounter();
return result;
}
