/// <summary>
/// Read a method that describes the type system to metadata mappings.
/// </summary>
private void ReadMetadataMethod(MethodIL methodOfMappings, Dictionary <MetadataType, int> typeMappings, Dictionary <MethodDesc, int> methodMappings, Dictionary <FieldDesc, int> fieldMappings, HashSet <ModuleDesc> metadataModules)
{
ILStreamReader il = new ILStreamReader(methodOfMappings);
// structure is
// REPEAT N TIMES
// ldtoken type/method/field OR ldc.i4 0. If ldtoken instruction is replaced with a ldc.i4, skip this entry
// ldc.i4 metadata value
// pop
// pop
while (true)
{
if (il.TryReadRet()) // ret
{
break;
}
TypeSystemEntity tse;
if (il.TryReadLdtokenAsTypeSystemEntity(out tse))
{
int metadataTokenValue = il.ReadLdcI4();
il.ReadPop();
il.ReadPop();
if (tse is MetadataType)
{
MetadataType type = (MetadataType)tse;
metadataModules.Add(type.Module);
typeMappings.Add(type, metadataTokenValue);
}
else if (tse is MethodDesc)
{
MethodDesc method = (MethodDesc)tse;
// Finalizers are called via a field on the EEType. They should not be reflectable.
if (!method.IsFinalizer)
{
metadataModules.Add(((MetadataType)method.OwningType).Module);
methodMappings.Add(method, metadataTokenValue);
}
}
else if (tse is FieldDesc)
{
FieldDesc field = (FieldDesc)tse;
metadataModules.Add(((MetadataType)field.OwningType).Module);
fieldMappings.Add(field, metadataTokenValue);
}
}
else
{
int deadLdtokenSignifier = il.ReadLdcI4();
Debug.Assert(deadLdtokenSignifier == 0);
il.ReadLdcI4();
il.ReadPop();
il.ReadPop();
}
}
}
/// <summary>
/// Read a method that describes the type system to metadata mappings.
/// </summary>
private void ReadMetadataMethod(MethodIL methodOfMappings, out List <MetadataMapping <MetadataType> > typeMappings, out List <MetadataMapping <MethodDesc> > methodMappings, out List <MetadataMapping <FieldDesc> > fieldMappings, ref HashSet <ModuleDesc> metadataModules)
{
typeMappings = new List <MetadataMapping <MetadataType> >();
methodMappings = new List <MetadataMapping <MethodDesc> >();
fieldMappings = new List <MetadataMapping <FieldDesc> >();
ILStreamReader il = new ILStreamReader(methodOfMappings);
// structure is
// REPEAT N TIMES
// ldtoken type/method/field OR ldc.i4 0. If ldtoken instruction is replaced with a ldc.i4, skip this entry
// ldc.i4 metadata value
// pop
// pop
while (true)
{
if (il.TryReadRet()) // ret
{
break;
}
TypeSystemEntity tse;
if (il.TryReadLdtokenAsTypeSystemEntity(out tse))
{
int metadataTokenValue = il.ReadLdcI4();
il.ReadPop();
il.ReadPop();
if (tse is MetadataType)
{
MetadataType type = (MetadataType)tse;
metadataModules.Add(type.Module);
typeMappings.Add(new MetadataMapping <MetadataType>(type, metadataTokenValue));
}
else if (tse is MethodDesc)
{
MethodDesc method = (MethodDesc)tse;
metadataModules.Add(((MetadataType)method.OwningType).Module);
methodMappings.Add(new MetadataMapping <MethodDesc>(method, metadataTokenValue));
}
else if (tse is FieldDesc)
{
FieldDesc field = (FieldDesc)tse;
metadataModules.Add(((MetadataType)field.OwningType).Module);
fieldMappings.Add(new MetadataMapping <FieldDesc>(field, metadataTokenValue));
}
}
else
{
int deadLdtokenSignifier = il.ReadLdcI4();
Debug.Assert(deadLdtokenSignifier == 0);
il.ReadLdcI4();
il.ReadPop();
il.ReadPop();
}
}
}
private Dictionary <MethodDesc, MethodDesc> LoadDynamicInvokeStubs()
{
MetadataType typeWithMetadataMappings = (MetadataType)_metadataDescribingModule.GetTypeByCustomAttributeTypeName(MetadataMappingTypeName);
Dictionary <MethodDesc, MethodDesc> dynamicInvokeMapTable = new Dictionary <MethodDesc, MethodDesc>();
MethodDesc dynamicInvokeStubDescriptorMethod = typeWithMetadataMappings.GetMethod("DynamicInvokeStubs", null);
if (dynamicInvokeStubDescriptorMethod == null)
{
return(dynamicInvokeMapTable);
}
ILProvider ilProvider = new ILProvider(null);
ILStreamReader il = new ILStreamReader(ilProvider.GetMethodIL(dynamicInvokeStubDescriptorMethod));
// structure is
// REPEAT N TIMES
//ldtoken method
//ldtoken dynamicInvokeStubMethod
//pop
//pop
while (true)
{
if (il.TryReadRet()) // ret
{
break;
}
MethodDesc method = il.ReadLdtokenAsTypeSystemEntity() as MethodDesc;
MethodDesc dynamicMethodInvokeStub = il.ReadLdtokenAsTypeSystemEntity() as MethodDesc;
il.ReadPop();
il.ReadPop();
if ((method != null) && (dynamicMethodInvokeStub != null))
{
dynamicInvokeMapTable[method] = dynamicMethodInvokeStub;
}
else
{
throw new BadImageFormatException();
}
}
return(dynamicInvokeMapTable);
}
private void ReadRequiredTemplates(MethodIL methodIL, HashSet <TypeDesc> typeTemplates, HashSet <MethodDesc> methodTemplates, HashSet <FieldDesc> fieldTemplates)
{
ILStreamReader il = new ILStreamReader(methodIL);
if (!_typeSystemContext.SupportsUniversalCanon)
{
return;
}
//
// Types, methods and field tokens listed here are *open* generic definitions determined by the reducer as needing reflection.
// Type tokens listed are tokens of generic type definitions that will need reflection support.
// Method tokens listed are either tokens of generic method definitions, or non-generic methods on generic containing type definitions, and need reflection support.
// Field tokens listed are for fields on generic type definitions that will need reflection support
// The canonical form supported by the typesystem context will determine how to instantiate the types/methods/fields listed here, and templatize them for
// reflection support at runtime (templates used by the dynamic TypeLoader component of the runtime).
//
// structure is
// REPEAT N TIMES
//ldtoken type
//pop
while (true)
{
if (il.TryReadRet()) // ret
{
break;
}
TypeSystemEntity tse;
il.TryReadLdtokenAsTypeSystemEntity(out tse);
il.ReadPop();
if (tse == null)
{
throw new BadImageFormatException();
}
if (tse is MetadataType)
{
MetadataType type = (MetadataType)tse;
Debug.Assert(type.IsGenericDefinition && type.HasInstantiation);
type = _typeSystemContext.GetInstantiatedType(type, GetUniversalCanonicalInstantiation(type.Instantiation.Length));
typeTemplates.Add(type);
}
else if (tse is MethodDesc)
{
MethodDesc method = (MethodDesc)tse;
TypeDesc containingType = method.OwningType;
Debug.Assert(method.IsTypicalMethodDefinition);
Debug.Assert(method.HasInstantiation || method.OwningType.HasInstantiation);
if (containingType.HasInstantiation)
{
containingType = _typeSystemContext.GetInstantiatedType((MetadataType)containingType, GetUniversalCanonicalInstantiation(containingType.Instantiation.Length));
method = containingType.GetMethod(method.Name, method.GetTypicalMethodDefinition().Signature);
typeTemplates.Add(containingType);
}
if (method.HasInstantiation)
{
method = _typeSystemContext.GetInstantiatedMethod(method, GetUniversalCanonicalInstantiation(method.Instantiation.Length));
}
methodTemplates.Add(method);
}
else if (tse is FieldDesc)
{
FieldDesc field = (FieldDesc)tse;
TypeDesc containingType = field.OwningType;
Debug.Assert(containingType.HasInstantiation && containingType.IsGenericDefinition);
containingType = _typeSystemContext.GetInstantiatedType((MetadataType)containingType, GetUniversalCanonicalInstantiation(containingType.Instantiation.Length));
field = containingType.GetField(field.Name);
typeTemplates.Add(containingType);
fieldTemplates.Add(field);
}
}
}
private IEnumerable <TypeSystemEntity> ReadRequiredGenericsEntities(MethodIL method)
{
ILStreamReader il = new ILStreamReader(method);
// structure is
// REPEAT N TIMES
//ldtoken generic type/method/field
//pop
while (true)
{
if (il.TryReadRet()) // ret
{
yield break;
}
TypeSystemEntity tse;
il.TryReadLdtokenAsTypeSystemEntity(out tse);
il.ReadPop();
if (tse == null)
{
throw new BadImageFormatException();
}
if (tse is TypeDesc)
{
if (tse is DefType)
{
if (((TypeDesc)tse).Instantiation.CheckValidInstantiationArguments() && ((TypeDesc)tse).CheckConstraints())
{
yield return(tse);
}
}
else if (tse is ByRefType)
{
// Skip by ref types.
}
else
{
throw new BadImageFormatException();
}
}
else if (tse is FieldDesc)
{
TypeDesc owningType = ((FieldDesc)tse).OwningType;
if (owningType.Instantiation.CheckValidInstantiationArguments() && owningType.CheckConstraints())
{
yield return(tse);
}
}
else if (tse is MethodDesc)
{
MethodDesc genericMethod = (MethodDesc)tse;
if (genericMethod.Instantiation.CheckValidInstantiationArguments() &&
genericMethod.OwningType.Instantiation.CheckValidInstantiationArguments() &&
genericMethod.CheckConstraints())
{
// TODO: Detect large number of instantiations of the same method and collapse to using dynamic
// USG instantiations at runtime, to avoid infinite generic expansion and large compilation times.
yield return(tse);
}
}
}
}
