/// <summary>
/// Initialize the Reader and LoadContext fields of the native layout info
/// </summary>
/// <param name="type"></param>
/// <param name="nativeLayoutInfo"></param>
private static void FinishInitNativeLayoutInfo(TypeDesc type, ref NativeLayoutInfo nativeLayoutInfo)
{
var nativeLayoutInfoLoadContext = new NativeLayoutInfoLoadContext();
nativeLayoutInfoLoadContext._typeSystemContext = type.Context;
nativeLayoutInfoLoadContext._module = nativeLayoutInfo.Module;
if (type is DefType)
{
nativeLayoutInfoLoadContext._typeArgumentHandles = ((DefType)type).Instantiation;
}
else if (type is ArrayType)
{
nativeLayoutInfoLoadContext._typeArgumentHandles = new Instantiation(new TypeDesc[] { ((ArrayType)type).ElementType });
}
else
{
Debug.Assert(false);
}
nativeLayoutInfoLoadContext._methodArgumentHandles = new Instantiation(null);
nativeLayoutInfo.Reader = TypeLoaderEnvironment.Instance.GetNativeLayoutInfoReader(nativeLayoutInfo.Module.Handle);
nativeLayoutInfo.LoadContext = nativeLayoutInfoLoadContext;
}
//
// Returns the template type handle for a generic instantiation type
//
public static TypeDesc TryGetTypeTemplate(TypeDesc concreteType, ref NativeLayoutInfo nativeLayoutInfo)
{
#if GENERICS_FORCE_USG
return(TryGetUniversalTypeTemplate(concreteType, ref nativeLayoutInfo));
#else
// First, see if there is a specific canonical template
TypeDesc result = TryGetTypeTemplate_Internal(concreteType, CanonicalFormKind.Specific, out nativeLayoutInfo.Module, out nativeLayoutInfo.Offset);
// If not found, see if there's a universal canonical template
result ??= TryGetUniversalTypeTemplate(concreteType, ref nativeLayoutInfo);
return(result);
#endif
}
public NativeParser GetParserForUniversalNativeLayoutInfo(out NativeLayoutInfoLoadContext universalLayoutLoadContext, out NativeLayoutInfo universalLayoutInfo)
{
universalLayoutInfo = new NativeLayoutInfo();
universalLayoutLoadContext = null;
TypeDesc universalTemplate = TypeBeingBuilt.Context.TemplateLookup.TryGetUniversalTypeTemplate(TypeBeingBuilt, ref universalLayoutInfo);
if (universalTemplate == null)
{
return(new NativeParser());
}
FinishInitNativeLayoutInfo(TypeBeingBuilt, ref universalLayoutInfo);
universalLayoutLoadContext = universalLayoutInfo.LoadContext;
return(new NativeParser(universalLayoutInfo.Reader, universalLayoutInfo.Offset));
}
//
// Returns the template type handle for a generic instantation type
//
public TypeDesc TryGetTypeTemplate(TypeDesc concreteType, ref NativeLayoutInfo nativeLayoutInfo)
{
#if GENERICS_FORCE_USG
return TryGetUniversalTypeTemplate(concreteType, ref nativeLayoutInfo);
#else
// First, see if there is a specific canonical template
TypeDesc result = TryGetTypeTemplate_Internal(concreteType, CanonicalFormKind.Specific, out nativeLayoutInfo.Module, out nativeLayoutInfo.Token);
// If not found, see if there's a universal canonical template
if (result == null)
result = TryGetUniversalTypeTemplate(concreteType, ref nativeLayoutInfo);
return result;
#endif
}
public NativeParser GetParserForUniversalNativeLayoutInfo(out NativeLayoutInfoLoadContext universalLayoutLoadContext)
{
NativeLayoutInfo universalLayoutInfo = new NativeLayoutInfo();
universalLayoutLoadContext = null;
TypeDesc universalTemplate = TypeBeingBuilt.Context.TemplateLookup.TryGetUniversalTypeTemplate(TypeBeingBuilt, ref universalLayoutInfo);
if (universalTemplate == null)
return new NativeParser();
FinishInitNativeLayoutInfo(TypeBeingBuilt, ref universalLayoutInfo);
universalLayoutLoadContext = universalLayoutInfo.LoadContext;
return new NativeParser(universalLayoutInfo.Reader, universalLayoutInfo.Token);
}
/// <summary>
/// Initialize the Reader and LoadContext fields of the native layout info
/// </summary>
/// <param name="type"></param>
/// <param name="nativeLayoutInfo"></param>
private static void FinishInitNativeLayoutInfo(TypeDesc type, ref NativeLayoutInfo nativeLayoutInfo)
{
var nativeLayoutInfoLoadContext = new NativeLayoutInfoLoadContext();
nativeLayoutInfoLoadContext._typeSystemContext = type.Context;
nativeLayoutInfoLoadContext._moduleHandle = nativeLayoutInfo.Module;
if (type is DefType)
{
nativeLayoutInfoLoadContext._typeArgumentHandles = ((DefType)type).Instantiation;
}
else if (type is ArrayType)
{
nativeLayoutInfoLoadContext._typeArgumentHandles = new Instantiation(new TypeDesc[] { ((ArrayType)type).ElementType });
}
else
{
Debug.Assert(false);
}
nativeLayoutInfoLoadContext._methodArgumentHandles = new Instantiation(null);
nativeLayoutInfo.Reader = TypeLoaderEnvironment.Instance.GetNativeLayoutInfoReader(nativeLayoutInfo.Module);
nativeLayoutInfo.LoadContext = nativeLayoutInfoLoadContext;
}
public TypeDesc TryGetNonUniversalTypeTemplate(TypeDesc concreteType, ref NativeLayoutInfo nativeLayoutInfo)
{
return(TryGetTypeTemplate_Internal(concreteType, CanonicalFormKind.Specific, out nativeLayoutInfo.Module, out nativeLayoutInfo.Offset));
}
// This method computes the method pointer and dictionary pointer for a GVM.
// Inputs:
// - targetTypeHanlde: target type on which the GVM is implemented
// - nameAndSignature: name and signature of the GVM method
// - genericMethodArgumentHandles: GVM instantiation arguments
// Outputs:
// - methodPointer: pointer to the GVM's implementation
// - dictionaryPointer: (if applicable) pointer to the dictionary to be used with the GVM call
public bool TryGetGenericVirtualMethodPointer(RuntimeTypeHandle targetTypeHandle, MethodNameAndSignature nameAndSignature, RuntimeTypeHandle[] genericMethodArgumentHandles, out IntPtr methodPointer, out IntPtr dictionaryPointer)
{
methodPointer = dictionaryPointer = IntPtr.Zero;
TypeSystemContext context = TypeSystemContextFactory.Create();
DefType targetType = (DefType)context.ResolveRuntimeTypeHandle(targetTypeHandle);
Instantiation methodInstantiation = context.ResolveRuntimeTypeHandles(genericMethodArgumentHandles);
InstantiatedMethod method = (InstantiatedMethod)context.ResolveGenericMethodInstantiation(false, targetType, nameAndSignature, methodInstantiation, IntPtr.Zero, false);
if (!method.CanShareNormalGenericCode())
{
// First see if we can find an exact method implementation for the GVM (avoid using USG implementations if we can,
// because USG code is much slower).
if (TryLookupExactMethodPointerForComponents(targetTypeHandle, nameAndSignature, genericMethodArgumentHandles, out methodPointer))
{
Debug.Assert(methodPointer != IntPtr.Zero);
TypeSystemContextFactory.Recycle(context);
return(true);
}
}
// If we cannot find an exact method entry point, look for an equivalent template and compute the generic dictinoary
TemplateLocator templateLocator = new TemplateLocator();
NativeLayoutInfo nativeLayoutInfo = new NativeLayoutInfo();
InstantiatedMethod templateMethod = templateLocator.TryGetGenericMethodTemplate(method, out nativeLayoutInfo.Module, out nativeLayoutInfo.Token);
if (templateMethod == null)
{
return(false);
}
methodPointer = templateMethod.IsCanonicalMethod(CanonicalFormKind.Universal) ?
templateMethod.UsgFunctionPointer :
templateMethod.FunctionPointer;
if (!TryLookupGenericMethodDictionaryForComponents(targetTypeHandle, nameAndSignature, genericMethodArgumentHandles, out dictionaryPointer))
{
using (LockHolder.Hold(_typeLoaderLock))
{
// Now that we hold the lock, we may find that existing types can now find
// their associated RuntimeTypeHandle. Flush the type builder states as a way
// to force the reresolution of RuntimeTypeHandles which couldn't be found before.
context.FlushTypeBuilderStates();
if (!TypeBuilder.TryBuildGenericMethod(method, out dictionaryPointer))
{
return(false);
}
}
}
Debug.Assert(methodPointer != IntPtr.Zero && dictionaryPointer != IntPtr.Zero);
if (templateMethod.IsCanonicalMethod(CanonicalFormKind.Universal))
{
// Check if we need to wrap the method pointer into a calling convention converter thunk
if (!TypeLoaderEnvironment.Instance.MethodSignatureHasVarsNeedingCallingConventionConverter(context, nameAndSignature.Signature))
{
TypeSystemContextFactory.Recycle(context);
return(true);
}
RuntimeTypeHandle[] typeArgs = Array.Empty <RuntimeTypeHandle>();
if (RuntimeAugments.IsGenericType(targetTypeHandle))
{
RuntimeAugments.GetGenericInstantiation(targetTypeHandle, out typeArgs);
}
// Create a CallingConventionConverter to call the method correctly
IntPtr thunkPtr = CallConverterThunk.MakeThunk(
CallConverterThunk.ThunkKind.StandardToGenericInstantiating,
methodPointer,
nameAndSignature.Signature,
dictionaryPointer,
typeArgs,
genericMethodArgumentHandles);
Debug.Assert(thunkPtr != IntPtr.Zero);
methodPointer = thunkPtr;
// Set dictionaryPointer to null so we don't make a fat function pointer around the whole thing.
dictionaryPointer = IntPtr.Zero;
// TODO! add a new call converter thunk that will pass the instantiating arg through and use a fat function pointer.
// should allow us to make fewer thunks.
}
TypeSystemContextFactory.Recycle(context);
return(true);
}
public TypeDesc TryGetNonUniversalTypeTemplate(TypeDesc concreteType, ref NativeLayoutInfo nativeLayoutInfo)
{
return TryGetTypeTemplate_Internal(concreteType, CanonicalFormKind.Specific, out nativeLayoutInfo.Module, out nativeLayoutInfo.Token);
}
public TypeDesc TryGetUniversalTypeTemplate(TypeDesc concreteType, ref NativeLayoutInfo nativeLayoutInfo)
{
return(TryGetTypeTemplate_Internal(concreteType, CanonicalFormKind.Universal, out nativeLayoutInfo.Module, out nativeLayoutInfo.Token));
}