/// <summary>
/// Attempt a virtual dispatch on a given instanceType based on the method found via a metadata token
/// </summary>
private static bool TryDispatchMethodOnTarget_Inner(NativeFormatModuleInfo module, int metadataToken, RuntimeTypeHandle targetInstanceType, out IntPtr methodAddress)
{
#if SUPPORTS_NATIVE_METADATA_TYPE_LOADING
TypeSystemContext context = TypeSystemContextFactory.Create();
NativeFormatMetadataUnit metadataUnit = context.ResolveMetadataUnit(module);
MethodDesc targetMethod = metadataUnit.GetMethod(metadataToken.AsHandle(), null);
TypeDesc instanceType = context.ResolveRuntimeTypeHandle(targetInstanceType);
MethodDesc realTargetMethod = targetMethod;
// For non-interface methods we support the target method not being the exact target. (This allows
// a canonical method to be passed in and work for any generic type instantiation.)
if (!targetMethod.OwningType.IsInterface)
{
realTargetMethod = instanceType.FindMethodOnTypeWithMatchingTypicalMethod(targetMethod);
}
bool success = LazyVTableResolver.TryDispatchMethodOnTarget(instanceType, realTargetMethod, out methodAddress);
TypeSystemContextFactory.Recycle(context);
return(success);
#else
methodAddress = IntPtr.Zero;
return(false);
#endif
}
/// <summary>
/// Attempt to convert the dispatch cell to a metadata token to a more efficient vtable dispatch or interface/slot dispatch.
/// Failure to convert is not a correctness issue. We also support performing a dispatch based on metadata token alone.
/// </summary>
private static DispatchCellInfo ConvertDispatchCellInfo_Inner(NativeFormatModuleInfo module, DispatchCellInfo cellInfo)
{
Debug.Assert(cellInfo.CellType == DispatchCellType.MetadataToken);
TypeSystemContext context = TypeSystemContextFactory.Create();
MethodDesc targetMethod = context.ResolveMetadataUnit(module).GetMethod(cellInfo.MetadataToken.AsHandle(), null);
Debug.Assert(!targetMethod.HasInstantiation); // At this time we do not support generic virtuals through the dispatch mechanism
Debug.Assert(targetMethod.IsVirtual);
if (targetMethod.OwningType.IsInterface)
{
if (!LazyVTableResolver.TryGetInterfaceSlotNumberFromMethod(targetMethod, out cellInfo.InterfaceSlot))
{
// Unable to resolve interface method. Fail, by not mutating cellInfo
return cellInfo;
}
if (!targetMethod.OwningType.RetrieveRuntimeTypeHandleIfPossible())
{
new TypeBuilder().BuildType(targetMethod.OwningType);
}
cellInfo.CellType = DispatchCellType.InterfaceAndSlot;
cellInfo.InterfaceType = targetMethod.OwningType.RuntimeTypeHandle.ToIntPtr();
cellInfo.MetadataToken = 0;
}
else
{
// Virtual function case, attempt to resolve to a VTable slot offset.
// If the offset is less than 4096 update the cellInfo
#if DEBUG
// The path of resolving a metadata token at dispatch time is relatively rare in practice.
// Force it to occur in debug builds with much more regularity
if ((s_ConvertDispatchCellInfoCounter % 16) == 0)
{
s_ConvertDispatchCellInfoCounter++;
TypeSystemContextFactory.Recycle(context);
return cellInfo;
}
s_ConvertDispatchCellInfoCounter++;
#endif
int slotIndexOfMethod = LazyVTableResolver.VirtualMethodToSlotIndex(targetMethod);
int vtableOffset = -1;
if (slotIndexOfMethod >= 0)
vtableOffset = LazyVTableResolver.SlotIndexToEETypeVTableOffset(slotIndexOfMethod);
if ((vtableOffset < 4096) && (vtableOffset != -1))
{
cellInfo.CellType = DispatchCellType.VTableOffset;
cellInfo.VTableOffset = checked((uint)vtableOffset);
cellInfo.MetadataToken = 0;
}
// Otherwise, do nothing, and resolve with a metadata dispatch later
}
TypeSystemContextFactory.Recycle(context);
return cellInfo;
}
private bool ResolveInterfaceGenericVirtualMethodSlot(RuntimeTypeHandle targetTypeHandle, ref RuntimeTypeHandle declaringType, ref MethodNameAndSignature methodNameAndSignature)
{
if (IsPregeneratedOrTemplateRuntimeTypeHandle(targetTypeHandle))
{
// If the target type isn't dynamic, or at least is template type generated, the static lookup logic is what we want.
return(ResolveInterfaceGenericVirtualMethodSlot_Static(targetTypeHandle, ref declaringType, ref methodNameAndSignature));
}
else
{
#if SUPPORTS_NATIVE_METADATA_TYPE_LOADING
TypeSystemContext context = TypeSystemContextFactory.Create();
DefType targetType = (DefType)context.ResolveRuntimeTypeHandle(targetTypeHandle);
// Method being called...
MethodDesc targetVirtualMethod = ResolveTypeHandleAndMethodNameAndSigToVirtualMethodDesc(context, declaringType, methodNameAndSignature);
if (targetVirtualMethod == null)
{
// If we can't find the method in the type system, it must only be present in the static environment. Search there instead.
TypeSystemContextFactory.Recycle(context);
return(ResolveInterfaceGenericVirtualMethodSlot_Static(targetTypeHandle, ref declaringType, ref methodNameAndSignature));
}
TypeDesc instanceDefTypeToExamine;
MethodDesc newlyFoundVirtualMethod = LazyVTableResolver.ResolveInterfaceMethodToVirtualMethod(targetType, out instanceDefTypeToExamine, targetVirtualMethod);
targetVirtualMethod = newlyFoundVirtualMethod;
// The pregenerated base type must be the one that implements the interface method
// Call into Redhawk to deal with this.
if ((newlyFoundVirtualMethod == null) && (instanceDefTypeToExamine != null))
{
TypeSystemContextFactory.Recycle(context);
// If we can't find the method in the type system, the overload must be defined in the static environment. Search there instead.
return(ResolveInterfaceGenericVirtualMethodSlot_Static(instanceDefTypeToExamine.GetRuntimeTypeHandle(), ref declaringType, ref methodNameAndSignature));
}
declaringType = targetVirtualMethod.OwningType.GetRuntimeTypeHandle();
methodNameAndSignature = targetVirtualMethod.NameAndSignature;
TypeSystemContextFactory.Recycle(context);
return(true);
#else
Environment.FailFast("GVM Resolution for non template or pregenerated type");
return(false);
#endif
}
}
/// <summary>
/// Resolve a dispatch on an interface EEType/slot index pair to a function pointer
/// </summary>
private bool TryResolveTypeSlotDispatch_Inner(IntPtr targetTypeAsIntPtr, IntPtr interfaceTypeAsIntPtr, ushort slot, out IntPtr methodAddress)
{
methodAddress = IntPtr.Zero;
#if SUPPORTS_NATIVE_METADATA_TYPE_LOADING
TypeSystemContext context = TypeSystemContextFactory.Create();
TypeDesc targetType;
TypeDesc interfaceType;
unsafe
{
targetType = context.ResolveRuntimeTypeHandle(((EEType *)targetTypeAsIntPtr.ToPointer())->ToRuntimeTypeHandle());
interfaceType = context.ResolveRuntimeTypeHandle(((EEType *)interfaceTypeAsIntPtr.ToPointer())->ToRuntimeTypeHandle());
}
if (!(interfaceType.GetTypeDefinition() is MetadataType))
{
// If the interface open type is not a metadata type, this must be an interface not known in the metadata world.
// Use the redhawk resolver for this directly.
TypeDesc pregeneratedType = LazyVTableResolver.GetMostDerivedPregeneratedOrTemplateLoadedType(targetType);
pregeneratedType.RetrieveRuntimeTypeHandleIfPossible();
interfaceType.RetrieveRuntimeTypeHandleIfPossible();
methodAddress = RuntimeAugments.ResolveDispatchOnType(pregeneratedType.RuntimeTypeHandle, interfaceType.RuntimeTypeHandle, slot);
}
else
{
MethodDesc interfaceMethod;
if (!LazyVTableResolver.TryGetMethodFromInterfaceSlot(interfaceType, slot, out interfaceMethod))
{
return(false);
}
if (!LazyVTableResolver.TryDispatchMethodOnTarget(targetType, interfaceMethod, out methodAddress))
{
return(false);
}
}
TypeSystemContextFactory.Recycle(context);
return(true);
#else
return(false);
#endif
}
/// <summary>
/// Try to resolve a virtual call to targetMethod to its implementation on instanceType.
/// </summary>
/// <param name="instanceType">non-interface type</param>
/// <param name="targetMethod">non-generic virtual or interface method</param>
/// <param name="methodAddress">function pointer resolved</param>
/// <returns>true if successful</returns>
public static bool TryDispatchMethodOnTarget(TypeDesc instanceType, MethodDesc targetMethod, out IntPtr methodAddress)
{
methodAddress = IntPtr.Zero;
if (targetMethod == null)
{
return(false);
}
if (IsPregeneratedOrTemplateTypeLoaded(instanceType))
{
if (targetMethod.OwningType.IsInterface)
{
ushort interfaceSlot;
if (!TryGetInterfaceSlotNumberFromMethod(targetMethod, out interfaceSlot))
{
return(false);
}
methodAddress = RuntimeAugments.ResolveDispatchOnType(instanceType.GetRuntimeTypeHandle(),
targetMethod.OwningType.GetRuntimeTypeHandle(),
interfaceSlot);
Debug.Assert(methodAddress != IntPtr.Zero); // TODO! This should happen for ICastable dispatch...
return(true);
}
else
{
unsafe
{
int vtableSlotIndex = LazyVTableResolver.VirtualMethodToSlotIndex(targetMethod);
EEType *eeType = instanceType.GetRuntimeTypeHandle().ToEETypePtr();
IntPtr *vtableStart = (IntPtr *)(((byte *)eeType) + sizeof(EEType));
methodAddress = vtableStart[vtableSlotIndex];
return(true);
}
}
}
MethodDesc targetVirtualMethod = targetMethod;
DefType instanceDefType = instanceType.GetClosestDefType();
// For interface resolution, its a two step process, first get the virtual slot
if (targetVirtualMethod.OwningType.IsInterface)
{
TypeDesc instanceDefTypeToExamine;
MethodDesc newlyFoundVirtualMethod = ResolveInterfaceMethodToVirtualMethod(instanceType, out instanceDefTypeToExamine, targetVirtualMethod);
targetVirtualMethod = newlyFoundVirtualMethod;
// The pregenerated type must be the one that implements the interface method
// Call into Redhawk to deal with this.
if ((newlyFoundVirtualMethod == null) && (instanceDefTypeToExamine != null))
{
ushort interfaceSlot;
if (!TryGetInterfaceSlotNumberFromMethod(targetMethod, out interfaceSlot))
{
return(false);
}
methodAddress = RuntimeAugments.ResolveDispatchOnType(instanceDefTypeToExamine.GetRuntimeTypeHandle(),
targetMethod.OwningType.GetRuntimeTypeHandle(),
interfaceSlot);
Debug.Assert(methodAddress != IntPtr.Zero); // TODO! This should happen for ICastable dispatch...
return(true);
}
}
// VirtualSlot can be null if the interface method isn't really implemented. This should never happen, but since our
// type loader doesn't check all interface overloads at load time, it could happen
if (targetVirtualMethod == null)
{
return(false);
}
// Resolve virtual method to exact method
MethodDesc dispatchMethod = instanceDefType.FindVirtualFunctionTargetMethodOnObjectType(targetVirtualMethod);
return(TryGetVTableCallableAddress(dispatchMethod, out methodAddress));
}
private ushort ComputeNumVTableSlots()
{
if (TypeBeingBuilt.RetrieveRuntimeTypeHandleIfPossible())
{
unsafe
{
return(TypeBeingBuilt.RuntimeTypeHandle.ToEETypePtr()->NumVtableSlots);
}
}
else
{
TypeDesc templateType = TypeBeingBuilt.ComputeTemplate(false);
if (templateType != null)
{
// Template type loader case
if (VTableSlotsMapping != null)
{
return(checked ((ushort)VTableSlotsMapping.NumSlotMappings));
}
else
{
// This should only happen for non-universal templates
Debug.Assert(TypeBeingBuilt.IsTemplateCanonical());
// Canonical template type loader case
unsafe
{
return(templateType.GetRuntimeTypeHandle().ToEETypePtr()->NumVtableSlots);
}
}
}
else if (TypeBeingBuilt.IsMdArray)
{
// MDArray types have the same vtable as the System.Array type they "derive" from.
unsafe
{
return(TypeBeingBuilt.BaseType.GetRuntimeTypeHandle().ToEETypePtr()->NumVtableSlots);
}
}
else
{
// Metadata based type loading.
// Generic Type Definitions have no actual vtable entries
if (TypeBeingBuilt.IsGenericDefinition)
{
return(0);
}
// We have at least as many slots as exist on the base type.
ushort numVTableSlots = 0;
checked
{
if (TypeBeingBuilt.BaseType != null)
{
numVTableSlots = TypeBeingBuilt.BaseType.GetOrCreateTypeBuilderState().NumVTableSlots;
}
else
{
// Generic interfaces have a dictionary slot
if (TypeBeingBuilt.IsInterface && TypeBeingBuilt.HasInstantiation)
{
numVTableSlots = 1;
}
}
// Interfaces have actual vtable slots
if (TypeBeingBuilt.IsInterface)
{
return(numVTableSlots);
}
foreach (MethodDesc method in TypeBeingBuilt.GetMethods())
{
#if SUPPORTS_NATIVE_METADATA_TYPE_LOADING
if (LazyVTableResolver.MethodDefinesVTableSlot(method))
{
numVTableSlots++;
}
#else
Environment.FailFast("metadata type loader required");
#endif
}
if (HasDictionarySlotInVTable)
{
numVTableSlots++;
}
}
return(numVTableSlots);
}
}
}
private static void CreateEETypeWorker(EEType *pTemplateEEType, UInt32 hashCodeOfNewType,
int arity, bool requireVtableSlotMapping, TypeBuilderState state)
{
bool successful = false;
IntPtr eeTypePtrPlusGCDesc = IntPtr.Zero;
IntPtr dynamicDispatchMapPtr = IntPtr.Zero;
DynamicModule *dynamicModulePtr = null;
try
{
Debug.Assert((pTemplateEEType != null) || (state.TypeBeingBuilt as MetadataType != null));
// In some situations involving arrays we can find as a template a dynamically generated type.
// In that case, the correct template would be the template used to create the dynamic type in the first
// place.
if (pTemplateEEType != null && pTemplateEEType->IsDynamicType)
{
pTemplateEEType = pTemplateEEType->DynamicTemplateType;
}
ModuleInfo moduleInfo = TypeLoaderEnvironment.GetModuleInfoForType(state.TypeBeingBuilt);
dynamicModulePtr = moduleInfo.DynamicModulePtr;
Debug.Assert(dynamicModulePtr != null);
bool requiresDynamicDispatchMap = requireVtableSlotMapping && (pTemplateEEType != null) && pTemplateEEType->HasDispatchMap;
uint valueTypeFieldPaddingEncoded = 0;
int baseSize = 0;
bool isValueType;
bool hasFinalizer;
bool isNullable;
bool isArray;
bool isGeneric;
ushort componentSize = 0;
ushort flags;
ushort runtimeInterfacesLength = 0;
bool isGenericEETypeDef = false;
if (state.RuntimeInterfaces != null)
{
runtimeInterfacesLength = checked ((ushort)state.RuntimeInterfaces.Length);
}
if (pTemplateEEType != null)
{
valueTypeFieldPaddingEncoded = EEType.ComputeValueTypeFieldPaddingFieldValue(
pTemplateEEType->ValueTypeFieldPadding,
(uint)pTemplateEEType->FieldAlignmentRequirement);
baseSize = (int)pTemplateEEType->BaseSize;
isValueType = pTemplateEEType->IsValueType;
hasFinalizer = pTemplateEEType->IsFinalizable;
isNullable = pTemplateEEType->IsNullable;
componentSize = pTemplateEEType->ComponentSize;
flags = pTemplateEEType->Flags;
isArray = pTemplateEEType->IsArray;
isGeneric = pTemplateEEType->IsGeneric;
Debug.Assert(pTemplateEEType->NumInterfaces == runtimeInterfacesLength);
}
else if (state.TypeBeingBuilt.IsGenericDefinition)
{
flags = (ushort)EETypeKind.GenericTypeDefEEType;
isValueType = state.TypeBeingBuilt.IsValueType;
if (isValueType)
{
flags |= (ushort)EETypeFlags.ValueTypeFlag;
}
if (state.TypeBeingBuilt.IsInterface)
{
flags |= (ushort)EETypeFlags.IsInterfaceFlag;
}
hasFinalizer = false;
isArray = false;
isNullable = false;
isGeneric = false;
isGenericEETypeDef = true;
componentSize = checked ((ushort)state.TypeBeingBuilt.Instantiation.Length);
baseSize = 0;
}
else
{
isValueType = state.TypeBeingBuilt.IsValueType;
hasFinalizer = state.TypeBeingBuilt.HasFinalizer;
isNullable = state.TypeBeingBuilt.GetTypeDefinition().IsNullable;
flags = EETypeBuilderHelpers.ComputeFlags(state.TypeBeingBuilt);
isArray = false;
isGeneric = state.TypeBeingBuilt.HasInstantiation;
if (state.TypeBeingBuilt.HasVariance)
{
state.GenericVarianceFlags = new int[state.TypeBeingBuilt.Instantiation.Length];
int i = 0;
foreach (GenericParameterDesc gpd in state.TypeBeingBuilt.GetTypeDefinition().Instantiation)
{
state.GenericVarianceFlags[i] = (int)gpd.Variance;
i++;
}
Debug.Assert(i == state.GenericVarianceFlags.Length);
}
}
// TODO! Change to if template is Universal or non-Existent
if (state.TypeSize.HasValue)
{
baseSize = state.TypeSize.Value;
int baseSizeBeforeAlignment = baseSize;
baseSize = MemoryHelpers.AlignUp(baseSize, IntPtr.Size);
if (isValueType)
{
// Compute the valuetype padding size based on size before adding the object type pointer field to the size
uint cbValueTypeFieldPadding = (uint)(baseSize - baseSizeBeforeAlignment);
// Add Object type pointer field to base size
baseSize += IntPtr.Size;
valueTypeFieldPaddingEncoded = (uint)EEType.ComputeValueTypeFieldPaddingFieldValue(cbValueTypeFieldPadding, (uint)state.FieldAlignment.Value);
}
// Minimum base size is 3 pointers, and requires us to bump the size of an empty class type
if (baseSize <= IntPtr.Size)
{
// ValueTypes should already have had their size bumped up by the normal type layout process
Debug.Assert(!isValueType);
baseSize += IntPtr.Size;
}
// Add sync block skew
baseSize += IntPtr.Size;
// Minimum basesize is 3 pointers
Debug.Assert(baseSize >= (IntPtr.Size * 3));
}
// Optional fields encoding
int cbOptionalFieldsSize;
OptionalFieldsRuntimeBuilder optionalFields;
{
optionalFields = new OptionalFieldsRuntimeBuilder(pTemplateEEType != null ? pTemplateEEType->OptionalFieldsPtr : null);
UInt32 rareFlags = optionalFields.GetFieldValue(EETypeOptionalFieldTag.RareFlags, 0);
rareFlags |= (uint)EETypeRareFlags.IsDynamicTypeFlag; // Set the IsDynamicTypeFlag
rareFlags &= ~(uint)EETypeRareFlags.NullableTypeViaIATFlag; // Remove the NullableTypeViaIATFlag flag
rareFlags &= ~(uint)EETypeRareFlags.HasSealedVTableEntriesFlag; // Remove the HasSealedVTableEntriesFlag
// we'll set IsDynamicTypeWithSealedVTableEntriesFlag instead
// Set the IsDynamicTypeWithSealedVTableEntriesFlag if needed
if (state.NumSealedVTableEntries > 0)
{
rareFlags |= (uint)EETypeRareFlags.IsDynamicTypeWithSealedVTableEntriesFlag;
}
if (requiresDynamicDispatchMap)
{
rareFlags |= (uint)EETypeRareFlags.HasDynamicallyAllocatedDispatchMapFlag;
}
if (state.NonGcDataSize != 0)
{
rareFlags |= (uint)EETypeRareFlags.IsDynamicTypeWithNonGcStatics;
}
if (state.GcDataSize != 0)
{
rareFlags |= (uint)EETypeRareFlags.IsDynamicTypeWithGcStatics;
}
if (state.ThreadDataSize != 0)
{
rareFlags |= (uint)EETypeRareFlags.IsDynamicTypeWithThreadStatics;
}
#if ARM
if (state.FieldAlignment == 8)
{
rareFlags |= (uint)EETypeRareFlags.RequiresAlign8Flag;
}
else
{
rareFlags &= ~(uint)EETypeRareFlags.RequiresAlign8Flag;
}
if (state.IsHFA)
{
rareFlags |= (uint)EETypeRareFlags.IsHFAFlag;
}
else
{
rareFlags &= ~(uint)EETypeRareFlags.IsHFAFlag;
}
#endif
if (state.HasStaticConstructor)
{
rareFlags |= (uint)EETypeRareFlags.HasCctorFlag;
}
else
{
rareFlags &= ~(uint)EETypeRareFlags.HasCctorFlag;
}
rareFlags |= (uint)EETypeRareFlags.HasDynamicModuleFlag;
optionalFields.SetFieldValue(EETypeOptionalFieldTag.RareFlags, rareFlags);
// Dispatch map is fetched either from template type, or from the dynamically allocated DispatchMap field
optionalFields.ClearField(EETypeOptionalFieldTag.DispatchMap);
optionalFields.ClearField(EETypeOptionalFieldTag.ValueTypeFieldPadding);
if (valueTypeFieldPaddingEncoded != 0)
{
optionalFields.SetFieldValue(EETypeOptionalFieldTag.ValueTypeFieldPadding, valueTypeFieldPaddingEncoded);
}
// Compute size of optional fields encoding
cbOptionalFieldsSize = optionalFields.Encode();
Debug.Assert(cbOptionalFieldsSize > 0);
}
// Note: The number of vtable slots on the EEType to create is not necessary equal to the number of
// vtable slots on the template type for universal generics (see ComputeVTableLayout)
ushort numVtableSlots = state.NumVTableSlots;
// Compute the EEType size and allocate it
EEType *pEEType;
{
// In order to get the size of the EEType to allocate we need the following information
// 1) The number of VTable slots (from the TypeBuilderState)
// 2) The number of Interfaces (from the template)
// 3) Whether or not there is a finalizer (from the template)
// 4) Optional fields size
// 5) Whether or not the type is nullable (from the template)
// 6) Whether or not the type has sealed virtuals (from the TypeBuilderState)
int cbEEType = (int)EEType.GetSizeofEEType(
numVtableSlots,
runtimeInterfacesLength,
hasFinalizer,
true,
isNullable,
state.NumSealedVTableEntries > 0,
isGeneric,
state.NonGcDataSize != 0,
state.GcDataSize != 0,
state.ThreadDataSize != 0);
// Dynamic types have an extra pointer-sized field that contains a pointer to their template type
cbEEType += IntPtr.Size;
// Check if we need another pointer sized field for a dynamic DispatchMap
cbEEType += (requiresDynamicDispatchMap ? IntPtr.Size : 0);
// Add another pointer sized field for a DynamicModule
cbEEType += IntPtr.Size;
int cbGCDesc = GetInstanceGCDescSize(state, pTemplateEEType, isValueType, isArray);
int cbGCDescAligned = MemoryHelpers.AlignUp(cbGCDesc, IntPtr.Size);
// Allocate enough space for the EEType + gcDescSize
eeTypePtrPlusGCDesc = MemoryHelpers.AllocateMemory(cbGCDescAligned + cbEEType + cbOptionalFieldsSize);
// Get the EEType pointer, and the template EEType pointer
pEEType = (EEType *)(eeTypePtrPlusGCDesc + cbGCDescAligned);
state.HalfBakedRuntimeTypeHandle = pEEType->ToRuntimeTypeHandle();
// Set basic EEType fields
pEEType->ComponentSize = componentSize;
pEEType->Flags = flags;
pEEType->BaseSize = (uint)baseSize;
pEEType->NumVtableSlots = numVtableSlots;
pEEType->NumInterfaces = runtimeInterfacesLength;
pEEType->HashCode = hashCodeOfNewType;
// Write the GCDesc
bool isSzArray = isArray ? state.ArrayRank < 1 : false;
int arrayRank = isArray ? state.ArrayRank.Value : 0;
CreateInstanceGCDesc(state, pTemplateEEType, pEEType, baseSize, cbGCDesc, isValueType, isArray, isSzArray, arrayRank);
Debug.Assert(pEEType->HasGCPointers == (cbGCDesc != 0));
#if GENERICS_FORCE_USG
if (state.NonUniversalTemplateType != null)
{
Debug.Assert(state.NonUniversalInstanceGCDescSize == cbGCDesc, "Non-universal instance GCDesc size not matching with universal GCDesc size!");
Debug.Assert(cbGCDesc == 0 || pEEType->HasGCPointers);
// The TestGCDescsForEquality helper will compare 2 GCDescs for equality, 4 bytes at a time (GCDesc contents treated as integers), and will read the
// GCDesc data in *reverse* order for instance GCDescs (subtracts 4 from the pointer values at each iteration).
// - For the first GCDesc, we use (pEEType - 4) to point to the first 4-byte integer directly preceeding the EEType
// - For the second GCDesc, given that the state.NonUniversalInstanceGCDesc already points to the first byte preceeding the template EEType, we
// subtract 3 to point to the first 4-byte integer directly preceeding the template EEtype
TestGCDescsForEquality(new IntPtr((byte *)pEEType - 4), state.NonUniversalInstanceGCDesc - 3, cbGCDesc, true);
}
#endif
// Copy the encoded optional fields buffer to the newly allocated memory, and update the OptionalFields field on the EEType
// It is important to set the optional fields first on the newly created EEType, because all other 'setters'
// will assert that the type is dynamic, just to make sure we are not making any changes to statically compiled types
pEEType->OptionalFieldsPtr = (byte *)pEEType + cbEEType;
optionalFields.WriteToEEType(pEEType, cbOptionalFieldsSize);
#if CORERT
pEEType->PointerToTypeManager = PermanentAllocatedMemoryBlobs.GetPointerToIntPtr(moduleInfo.Handle);
#endif
pEEType->DynamicModule = dynamicModulePtr;
// Copy VTable entries from template type
int numSlotsFilled = 0;
IntPtr *pVtable = (IntPtr *)((byte *)pEEType + sizeof(EEType));
if (pTemplateEEType != null)
{
IntPtr *pTemplateVtable = (IntPtr *)((byte *)pTemplateEEType + sizeof(EEType));
for (int i = 0; i < pTemplateEEType->NumVtableSlots; i++)
{
int vtableSlotInDynamicType = requireVtableSlotMapping ? state.VTableSlotsMapping.GetVTableSlotInTargetType(i) : i;
if (vtableSlotInDynamicType != -1)
{
Debug.Assert(vtableSlotInDynamicType < numVtableSlots);
IntPtr dictionaryPtrValue;
if (requireVtableSlotMapping && state.VTableSlotsMapping.IsDictionarySlot(i, out dictionaryPtrValue))
{
// This must be the dictionary pointer value of one of the base types of the
// current universal generic type being constructed.
pVtable[vtableSlotInDynamicType] = dictionaryPtrValue;
// Assert that the current template vtable slot is also a NULL value since all
// universal generic template types have NULL dictionary slot values in their vtables
Debug.Assert(pTemplateVtable[i] == IntPtr.Zero);
}
else
{
pVtable[vtableSlotInDynamicType] = pTemplateVtable[i];
}
numSlotsFilled++;
}
}
}
else if (isGenericEETypeDef)
{
// If creating a Generic Type Definition
Debug.Assert(pEEType->NumVtableSlots == 0);
}
else
{
#if SUPPORTS_NATIVE_METADATA_TYPE_LOADING
// Dynamically loaded type
// Fill the vtable with vtable resolution thunks in all slots except for
// the dictionary slots, which should be filled with dictionary pointers if those
// dictionaries are already published.
TypeDesc nextTypeToExamineForDictionarySlot = state.TypeBeingBuilt;
TypeDesc typeWithDictionary;
int nextDictionarySlot = GetMostDerivedDictionarySlot(ref nextTypeToExamineForDictionarySlot, out typeWithDictionary);
for (int iSlot = pEEType->NumVtableSlots - 1; iSlot >= 0; iSlot--)
{
bool isDictionary = iSlot == nextDictionarySlot;
if (!isDictionary)
{
pVtable[iSlot] = LazyVTableResolver.GetThunkForSlot(iSlot);
}
else
{
if (typeWithDictionary.RetrieveRuntimeTypeHandleIfPossible())
{
pVtable[iSlot] = typeWithDictionary.RuntimeTypeHandle.GetDictionary();
}
nextDictionarySlot = GetMostDerivedDictionarySlot(ref nextTypeToExamineForDictionarySlot, out typeWithDictionary);
}
numSlotsFilled++;
}
#else
Environment.FailFast("Template type loader is null, but metadata based type loader is not in use");
#endif
}
Debug.Assert(numSlotsFilled == numVtableSlots);
// Copy Pointer to finalizer method from the template type
if (hasFinalizer)
{
if (pTemplateEEType != null)
{
pEEType->FinalizerCode = pTemplateEEType->FinalizerCode;
}
else
{
#if SUPPORTS_NATIVE_METADATA_TYPE_LOADING
pEEType->FinalizerCode = LazyVTableResolver.GetFinalizerThunk();
#else
Environment.FailFast("Template type loader is null, but metadata based type loader is not in use");
#endif
}
}
}
// Copy the sealed vtable entries if they exist on the template type
if (state.NumSealedVTableEntries > 0)
{
state.HalfBakedSealedVTable = MemoryHelpers.AllocateMemory((int)state.NumSealedVTableEntries * IntPtr.Size);
UInt32 cbSealedVirtualSlotsTypeOffset = pEEType->GetFieldOffset(EETypeField.ETF_SealedVirtualSlots);
*((IntPtr *)((byte *)pEEType + cbSealedVirtualSlotsTypeOffset)) = state.HalfBakedSealedVTable;
for (UInt16 i = 0; i < state.NumSealedVTableEntries; i++)
{
IntPtr value = pTemplateEEType->GetSealedVirtualSlot(i);
pEEType->SetSealedVirtualSlot(value, i);
}
}
// Create a new DispatchMap for the type
if (requiresDynamicDispatchMap)
{
DispatchMap *pTemplateDispatchMap = (DispatchMap *)RuntimeAugments.GetDispatchMapForType(pTemplateEEType->ToRuntimeTypeHandle());
dynamicDispatchMapPtr = MemoryHelpers.AllocateMemory(pTemplateDispatchMap->Size);
UInt32 cbDynamicDispatchMapOffset = pEEType->GetFieldOffset(EETypeField.ETF_DynamicDispatchMap);
*((IntPtr *)((byte *)pEEType + cbDynamicDispatchMapOffset)) = dynamicDispatchMapPtr;
DispatchMap *pDynamicDispatchMap = (DispatchMap *)dynamicDispatchMapPtr;
pDynamicDispatchMap->NumEntries = pTemplateDispatchMap->NumEntries;
for (int i = 0; i < pTemplateDispatchMap->NumEntries; i++)
{
DispatchMap.DispatchMapEntry *pTemplateEntry = (*pTemplateDispatchMap)[i];
DispatchMap.DispatchMapEntry *pDynamicEntry = (*pDynamicDispatchMap)[i];
pDynamicEntry->_usInterfaceIndex = pTemplateEntry->_usInterfaceIndex;
pDynamicEntry->_usInterfaceMethodSlot = pTemplateEntry->_usInterfaceMethodSlot;
if (pTemplateEntry->_usImplMethodSlot < pTemplateEEType->NumVtableSlots)
{
pDynamicEntry->_usImplMethodSlot = (ushort)state.VTableSlotsMapping.GetVTableSlotInTargetType(pTemplateEntry->_usImplMethodSlot);
Debug.Assert(pDynamicEntry->_usImplMethodSlot < numVtableSlots);
}
else
{
// This is an entry in the sealed vtable. We need to adjust the slot number based on the number of vtable slots
// in the dynamic EEType
pDynamicEntry->_usImplMethodSlot = (ushort)(pTemplateEntry->_usImplMethodSlot - pTemplateEEType->NumVtableSlots + numVtableSlots);
Debug.Assert(state.NumSealedVTableEntries > 0 &&
pDynamicEntry->_usImplMethodSlot >= numVtableSlots &&
(pDynamicEntry->_usImplMethodSlot - numVtableSlots) < state.NumSealedVTableEntries);
}
}
}
if (pTemplateEEType != null)
{
pEEType->DynamicTemplateType = pTemplateEEType;
}
else
{
// Use object as the template type for non-template based EETypes. This will
// allow correct Module identification for types.
if (state.TypeBeingBuilt.HasVariance)
{
// TODO! We need to have a variant EEType here if the type has variance, as the
// CreateGenericInstanceDescForType requires it. However, this is a ridiculous api surface
// When we remove GenericInstanceDescs from the product, get rid of this weird special
// case
pEEType->DynamicTemplateType = typeof(IEnumerable <int>).TypeHandle.ToEETypePtr();
}
else
{
pEEType->DynamicTemplateType = typeof(object).TypeHandle.ToEETypePtr();
}
}
int nonGCStaticDataOffset = 0;
if (!isArray && !isGenericEETypeDef)
{
nonGCStaticDataOffset = state.HasStaticConstructor ? -TypeBuilder.ClassConstructorOffset : 0;
// create GC desc
if (state.GcDataSize != 0 && state.GcStaticDesc == IntPtr.Zero)
{
int cbStaticGCDesc;
state.GcStaticDesc = CreateStaticGCDesc(state.StaticGCLayout, out state.AllocatedStaticGCDesc, out cbStaticGCDesc);
#if GENERICS_FORCE_USG
TestGCDescsForEquality(state.GcStaticDesc, state.NonUniversalStaticGCDesc, cbStaticGCDesc, false);
#endif
}
if (state.ThreadDataSize != 0 && state.ThreadStaticDesc == IntPtr.Zero)
{
int cbThreadStaticGCDesc;
state.ThreadStaticDesc = CreateStaticGCDesc(state.ThreadStaticGCLayout, out state.AllocatedThreadStaticGCDesc, out cbThreadStaticGCDesc);
#if GENERICS_FORCE_USG
TestGCDescsForEquality(state.ThreadStaticDesc, state.NonUniversalThreadStaticGCDesc, cbThreadStaticGCDesc, false);
#endif
}
// If we have a class constructor, our NonGcDataSize MUST be non-zero
Debug.Assert(!state.HasStaticConstructor || (state.NonGcDataSize != 0));
}
if (isGeneric)
{
if (!RuntimeAugments.CreateGenericInstanceDescForType(*(RuntimeTypeHandle *)&pEEType, arity, state.NonGcDataSize, nonGCStaticDataOffset,
state.GcDataSize, (int)state.ThreadStaticOffset, state.GcStaticDesc, state.ThreadStaticDesc, state.GenericVarianceFlags))
{
throw new OutOfMemoryException();
}
}
else
{
Debug.Assert(arity == 0 || isGenericEETypeDef);
// We don't need to report the non-gc and gc static data regions and allocate them for non-generics,
// as we currently place these fields directly into the image
if (!isGenericEETypeDef && state.ThreadDataSize != 0)
{
// Types with thread static fields ALWAYS get a GID. The GID is used to perform GC
// and lifetime management of the thread static data. However, these GIDs are only used for that
// so the specified GcDataSize, etc are 0
if (!RuntimeAugments.CreateGenericInstanceDescForType(*(RuntimeTypeHandle *)&pEEType, 0, 0, 0, 0, (int)state.ThreadStaticOffset, IntPtr.Zero, state.ThreadStaticDesc, null))
{
throw new OutOfMemoryException();
}
}
}
if (state.Dictionary != null)
{
state.HalfBakedDictionary = state.Dictionary.Allocate();
}
Debug.Assert(!state.HalfBakedRuntimeTypeHandle.IsNull());
Debug.Assert((state.NumSealedVTableEntries == 0 && state.HalfBakedSealedVTable == IntPtr.Zero) || (state.NumSealedVTableEntries > 0 && state.HalfBakedSealedVTable != IntPtr.Zero));
Debug.Assert((state.Dictionary == null && state.HalfBakedDictionary == IntPtr.Zero) || (state.Dictionary != null && state.HalfBakedDictionary != IntPtr.Zero));
successful = true;
}
finally
{
if (!successful)
{
if (eeTypePtrPlusGCDesc != IntPtr.Zero)
{
MemoryHelpers.FreeMemory(eeTypePtrPlusGCDesc);
}
if (dynamicDispatchMapPtr != IntPtr.Zero)
{
MemoryHelpers.FreeMemory(dynamicDispatchMapPtr);
}
if (state.HalfBakedSealedVTable != IntPtr.Zero)
{
MemoryHelpers.FreeMemory(state.HalfBakedSealedVTable);
}
if (state.HalfBakedDictionary != IntPtr.Zero)
{
MemoryHelpers.FreeMemory(state.HalfBakedDictionary);
}
if (state.AllocatedStaticGCDesc)
{
MemoryHelpers.FreeMemory(state.GcStaticDesc);
}
if (state.AllocatedThreadStaticGCDesc)
{
MemoryHelpers.FreeMemory(state.ThreadStaticDesc);
}
}
}
}
