public Entry(EEType eet)
{
etype = new EType(eet);
fields = new List <Field>();
changedFlag = false;
}
// cache must be a size which is a power of two.
internal static unsafe object CastableTargetLookup(CastableObjectCacheEntry[] cache, EEType* interfaceType)
{
uint cacheMask = (uint)cache.Length - 1;
uint bucket = interfaceType->HashCode & cacheMask;
uint curbucket = bucket;
// hash algorithm is open addressing with linear probing
while (curbucket < cache.Length)
{
if (cache[curbucket].Type == interfaceType)
return cache[curbucket].InstanceObjectForType;
if (cache[curbucket].Type == null)
return null;
curbucket++;
}
// Handle wrap-around case
curbucket = 0;
while (curbucket < bucket)
{
if (cache[curbucket].Type == interfaceType)
return cache[curbucket].InstanceObjectForType;
if (cache[curbucket].Type == null)
return null;
curbucket++;
}
return null;
}
private static IntPtr RhResolveDispatchWorker(object pObject, EEType* pInterfaceType, ushort slot)
{
// Type of object we're dispatching on.
EEType* pInstanceType = pObject.EEType;
// Type whose DispatchMap is used. Usually the same as the above but for types which implement ICastable
// we may repeat this process with an alternate type.
EEType* pResolvingInstanceType = pInstanceType;
IntPtr pTargetCode = DispatchResolve.FindInterfaceMethodImplementationTarget(pResolvingInstanceType,
pInterfaceType,
slot);
if (pTargetCode == IntPtr.Zero && pInstanceType->IsICastable)
{
// Dispatch not resolved through normal dispatch map, try using the ICastable
IntPtr pfnGetImplTypeMethod = pInstanceType->ICastableGetImplTypeMethod;
pResolvingInstanceType = (EEType*)CalliIntrinsics.Call<IntPtr>(pfnGetImplTypeMethod, pObject, new IntPtr(pInterfaceType));
pTargetCode = DispatchResolve.FindInterfaceMethodImplementationTarget(pResolvingInstanceType,
pInterfaceType,
slot);
}
return pTargetCode;
}
private void button2_Click_1(object sender, EventArgs e)
{
resetPanels();
EEType eet = (comboBoxEntrySelector.SelectedItem as EType).etype;
project.entries[(int)eet] = new Entry(eet);
//need to add the method to drop the flag "changed" in the corresponding entry
}
#pragma warning restore
public static IntPtr FindInterfaceMethodImplementationTarget(EEType* pTgtType,
EEType* pItfType,
ushort itfSlotNumber)
{
DynamicModule* dynamicModule = pTgtType->DynamicModule;
// Use the dynamic module resolver if it's present
if ((dynamicModule != null) && (dynamicModule->DynamicTypeSlotDispatchResolve != IntPtr.Zero))
{
return CalliIntrinsics.Call<IntPtr>(dynamicModule->DynamicTypeSlotDispatchResolve,
(IntPtr)pTgtType, (IntPtr)pItfType, itfSlotNumber);
}
// Start at the current type and work up the inheritance chain
EEType* pCur = pTgtType;
UInt32 iCurInheritanceChainDelta = 0;
if (pItfType->IsCloned)
pItfType = pItfType->CanonicalEEType;
while (pCur != null)
{
UInt16 implSlotNumber;
if (FindImplSlotForCurrentType(
pCur, pItfType, itfSlotNumber, &implSlotNumber))
{
IntPtr targetMethod;
if (implSlotNumber < pCur->NumVtableSlots)
{
// true virtual - need to get the slot from the target type in case it got overridden
targetMethod = pTgtType->GetVTableStartAddress()[implSlotNumber];
}
else
{
// sealed virtual - need to get the slot form the implementing type, because
// it's not present on the target type
targetMethod = pCur->GetSealedVirtualSlot((ushort)(implSlotNumber - pCur->NumVtableSlots));
}
return targetMethod;
}
if (pCur->IsArray)
pCur = pCur->GetArrayEEType();
else
pCur = pCur->NonArrayBaseType;
iCurInheritanceChainDelta++;
}
return IntPtr.Zero;
}
private static bool FindImplSlotForCurrentType(EEType* pTgtType,
EEType* pItfType,
UInt16 itfSlotNumber,
UInt16* pImplSlotNumber)
{
bool fRes = false;
// If making a call and doing virtual resolution don't look into the dispatch map,
// take the slot number directly.
if (!pItfType->IsInterface)
{
*pImplSlotNumber = itfSlotNumber;
// Only notice matches if the target type and search types are the same
// This will make dispatch to sealed slots work correctly
return pTgtType == pItfType;
}
if (pTgtType->HasDispatchMap)
{
// For variant interface dispatch, the algorithm is to walk the parent hierarchy, and at each level
// attempt to dispatch exactly first, and then if that fails attempt to dispatch variantly. This can
// result in interesting behavior such as a derived type only overriding one particular instantiation
// and funneling all the dispatches to it, but its the algorithm.
bool fDoVariantLookup = false; // do not check variance for first scan of dispatch map
fRes = FindImplSlotInSimpleMap(
pTgtType, pItfType, itfSlotNumber, pImplSlotNumber, fDoVariantLookup);
if (!fRes)
{
fDoVariantLookup = true; // check variance for second scan of dispatch map
fRes = FindImplSlotInSimpleMap(
pTgtType, pItfType, itfSlotNumber, pImplSlotNumber, fDoVariantLookup);
}
}
return fRes;
}
internal extern static unsafe IntPtr RhpGetICastableIsInstanceOfInterfaceMethod(EEType* pEEType);
internal extern static unsafe byte RhpGetNullableEETypeValueOffset(EEType* pEEType);
internal unsafe extern static IntPtr RhpUpdateDispatchCellCache(IntPtr pCell, IntPtr pTargetCode, EEType* pInstanceType, ref DispatchCellInfo newCellInfo);
internal unsafe extern static IntPtr RhpGetSealedVirtualSlot(EEType* pEEType, ushort slot);
internal unsafe extern static bool RhpHasDispatchMap(EEType* pEETypen);
internal unsafe extern static void RhUnbox(object obj, ref byte data, EEType* pUnboxToEEType);
private static bool ShouldTypedClauseCatchThisException(object exception, EEType* pClauseType)
{
if (TypeCast.IsInstanceOfClass(exception, pClauseType) != null)
return true;
if (s_pLowLevelObjectType == null)
{
// TODO: Avoid allocating here as that may fail
s_pLowLevelObjectType = new System.Object().EEType;
}
// This allows the typical try { } catch { }--which expands to a typed catch of System.Object--to work on
// all objects when the clause is in the low level runtime code. This special case is needed because
// objects from foreign type systems are sometimes throw back up at runtime code and this is the only way
// to catch them outside of having a filter with no type check in it, which isn't currently possible to
// write in C#. See https://github.com/dotnet/roslyn/issues/4388
if (pClauseType->IsEquivalentTo(s_pLowLevelObjectType))
return true;
return false;
}
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);
}
}
}
}
unsafe static bool IsInstanceOfInterfaceViaICastable(object obj, EEType* pTargetType)
{
// Call the ICastable.IsInstanceOfInterface method directly rather than via an interface
// dispatch since we know the method address statically. We ignore any cast error exception
// object passed back on failure (result == false) since IsInstanceOfInterface never throws.
IntPtr pfnIsInstanceOfInterface = obj.EEType->ICastableIsInstanceOfInterfaceMethod;
Exception castError = null;
if (CalliIntrinsics.Call<bool>(pfnIsInstanceOfInterface, obj, pTargetType, out castError))
return true;
return false;
}
// Compare two types to see if they are compatible via generic variance.
static private unsafe bool TypesAreCompatibleViaGenericVariance(EEType* pSourceType, EEType* pTargetType)
{
EEType* pTargetGenericType = pTargetType->GenericDefinition;
EEType* pSourceGenericType = pSourceType->GenericDefinition;
// If the generic types aren't the same then the types aren't compatible.
if (pSourceGenericType == pTargetGenericType)
{
// Get generic instantiation metadata for both types.
EETypeRef* pTargetInstantiation = pTargetType->GenericArguments;
int targetArity = (int)pTargetType->GenericArity;
GenericVariance* pTargetVarianceInfo = pTargetType->GenericVariance;
Debug.Assert(pTargetVarianceInfo != null, "did not expect empty variance info");
EETypeRef* pSourceInstantiation = pSourceType->GenericArguments;
int sourceArity = (int)pSourceType->GenericArity;
GenericVariance* pSourceVarianceInfo = pSourceType->GenericVariance;
Debug.Assert(pSourceVarianceInfo != null, "did not expect empty variance info");
// The types represent different instantiations of the same generic type. The
// arity of both had better be the same.
Debug.Assert(targetArity == sourceArity, "arity mismatch betweeen generic instantiations");
// Compare the instantiations to see if they're compatible taking variance into account.
if (TypeParametersAreCompatible(targetArity,
pSourceInstantiation,
pTargetInstantiation,
pTargetVarianceInfo,
false))
{
return true;
}
}
return false;
}
public EType()
{
etype = EEType.article;
}
internal unsafe extern static object RhpNewFastMisalign(EEType * pEEType);
public EType(EEType et)
{
etype = et;
}
internal unsafe extern static EEType* RhpGetArrayBaseType(EEType* pEEType);
/// <summary>
/// Return true if both types are good for simple casting: canonical, no related type via IAT, no generic variance
/// </summary>
internal static bool BothSimpleCasting(EEType* pThis, EEType* pOther)
{
return ((pThis->_usFlags | pOther->_usFlags) & (ushort)EETypeFlags.ComplexCastingMask) == (ushort)EETypeKind.CanonicalEEType;
}
internal unsafe extern static DispatchResolve.DispatchMap* RhpGetDispatchMap(EEType* pEEType);
internal bool IsEquivalentTo(EEType* pOtherEEType)
{
fixed (EEType* pThis = &this)
{
if (pThis == pOtherEEType)
return true;
EEType* pThisEEType = pThis;
if (pThisEEType->IsCloned)
pThisEEType = pThisEEType->CanonicalEEType;
if (pOtherEEType->IsCloned)
pOtherEEType = pOtherEEType->CanonicalEEType;
if (pThisEEType == pOtherEEType)
return true;
if (pThisEEType->IsParameterizedType && pOtherEEType->IsParameterizedType)
{
return pThisEEType->RelatedParameterType->IsEquivalentTo(pOtherEEType->RelatedParameterType) &&
pThisEEType->ParameterizedTypeShape == pOtherEEType->ParameterizedTypeShape;
}
}
return false;
}
internal unsafe extern static IntPtr RhpSearchDispatchCellCache(IntPtr pCell, EEType* pInstanceType);
// Returns true if the passed in EEType is the EEType for System.Object
// This is recognized by the fact that System.Object and interfaces are the only ones without a base type
internal static unsafe bool IsSystemObject(EEType* pEEType)
{
if (pEEType->IsArray)
return false;
return (pEEType->NonArrayBaseType == null) && !pEEType->IsInterface;
}
internal extern static unsafe UInt32 RhpGetEETypeRareFlags(EEType* pEEType);
// Returns true if the passed in EEType is the EEType for System.Array.
// The binder sets a special CorElementType for this well known type
internal static unsafe bool IsSystemArray(EEType* pEEType)
{
return (pEEType->CorElementType == CorElementType.ELEMENT_TYPE_ARRAY);
}
internal extern static unsafe EEType* RhpGetNullableEEType(EEType* pEEType);
internal void SetToCloneOf(EEType *pOrigType)
{
Debug.Assert((_usFlags & (ushort)EETypeFlags.EETypeKindMask) == 0, "should be a canonical type");
this._usFlags |= (ushort)EETypeKind.ClonedEEType;
this._relatedType._pCanonicalType = pOrigType;
}
internal extern static unsafe IntPtr RhpGetICastableGetImplTypeMethod(EEType* pEEType);
internal unsafe extern static object RhpNewFastAlign8(EEType * pEEType); // BEWARE: not for finalizable objects!
static internal unsafe bool ImplementsInterface(EEType* pObjType, EEType* pTargetType)
{
Debug.Assert(!pTargetType->IsParameterizedType, "did not expect paramterized type");
Debug.Assert(pTargetType->IsInterface, "IsInstanceOfInterface called with non-interface EEType");
// This can happen with generic interface types
// Debug.Assert(!pTargetType->IsCloned, "cloned interface types are disallowed");
// canonicalize target type
if (pTargetType->IsCloned)
pTargetType = pTargetType->CanonicalEEType;
int numInterfaces = pObjType->NumInterfaces;
EEInterfaceInfo* interfaceMap = pObjType->InterfaceMap;
for (int i = 0; i < numInterfaces; i++)
{
EEType* pInterfaceType = interfaceMap[i].InterfaceType;
// canonicalize the interface type
if (pInterfaceType->IsCloned)
pInterfaceType = pInterfaceType->CanonicalEEType;
if (pInterfaceType == pTargetType)
{
return true;
}
}
// We did not find the interface type in the list of supported interfaces. There's still one
// chance left: if the target interface is generic and one or more of its type parameters is co or
// contra variant then the object can still match if it implements a different instantiation of
// the interface with type compatible generic arguments.
//
// Interfaces which are only variant for arrays have the HasGenericVariance flag set even if they
// are not variant.
bool fArrayCovariance = pObjType->IsArray;
if (pTargetType->HasGenericVariance)
{
// Grab details about the instantiation of the target generic interface.
EEType* pTargetGenericType = pTargetType->GenericDefinition;
EETypeRef* pTargetInstantiation = pTargetType->GenericArguments;
int targetArity = (int)pTargetType->GenericArity;
GenericVariance* pTargetVarianceInfo = pTargetType->GenericVariance;
Debug.Assert(pTargetVarianceInfo != null, "did not expect empty variance info");
for (int i = 0; i < numInterfaces; i++)
{
EEType* pInterfaceType = interfaceMap[i].InterfaceType;
// We can ignore interfaces which are not also marked as having generic variance
// unless we're dealing with array covariance.
//
// Interfaces which are only variant for arrays have the HasGenericVariance flag set even if they
// are not variant.
if (pInterfaceType->HasGenericVariance)
{
EEType* pInterfaceGenericType = pInterfaceType->GenericDefinition;
// If the generic types aren't the same then the types aren't compatible.
if (pInterfaceGenericType != pTargetGenericType)
continue;
// Grab instantiation details for the candidate interface.
EETypeRef* pInterfaceInstantiation = pInterfaceType->GenericArguments;
int interfaceArity = (int)pInterfaceType->GenericArity;
GenericVariance* pInterfaceVarianceInfo = pInterfaceType->GenericVariance;
Debug.Assert(pInterfaceVarianceInfo != null, "did not expect empty variance info");
// The types represent different instantiations of the same generic type. The
// arity of both had better be the same.
Debug.Assert(targetArity == interfaceArity, "arity mismatch betweeen generic instantiations");
// Compare the instantiations to see if they're compatible taking variance into account.
if (TypeParametersAreCompatible(targetArity,
pInterfaceInstantiation,
pTargetInstantiation,
pTargetVarianceInfo,
fArrayCovariance))
return true;
}
}
}
return false;
}
internal unsafe extern static object RhpNewFinalizableAlign8(EEType* pEEType);
// Internally callable version of the export method above. Has two additional flags:
// fBoxedSource : assume the source type is boxed so that value types and enums are
// compatible with Object, ValueType and Enum (if applicable)
// fAllowSizeEquivalence : allow identically sized integral types and enums to be considered
// equivalent (currently used only for array element types)
static internal unsafe bool AreTypesAssignableInternal(EEType* pSourceType, EEType* pTargetType, AssignmentVariation variation)
{
bool fBoxedSource = ((variation & AssignmentVariation.BoxedSource) == AssignmentVariation.BoxedSource);
bool fAllowSizeEquivalence = ((variation & AssignmentVariation.AllowSizeEquivalence ) == AssignmentVariation.AllowSizeEquivalence);
//
// Are the types identical?
//
if (AreTypesEquivalentInternal(pSourceType, pTargetType))
return true;
//
// Handle cast to interface cases.
//
if (pTargetType->IsInterface)
{
// Value types can only be cast to interfaces if they're boxed.
if (!fBoxedSource && pSourceType->IsValueType)
return false;
if (ImplementsInterface(pSourceType, pTargetType))
return true;
// Are the types compatible due to generic variance?
if (pTargetType->HasGenericVariance && pSourceType->HasGenericVariance)
return TypesAreCompatibleViaGenericVariance(pSourceType, pTargetType);
return false;
}
if (pSourceType->IsInterface)
{
// The only non-interface type an interface can be cast to is Object.
return WellKnownEETypes.IsSystemObject(pTargetType);
}
//
// Handle cast to array or pointer cases.
//
if (pTargetType->IsParameterizedType)
{
if (pSourceType->IsParameterizedType
&& (pTargetType->ParameterizedTypeShape == pSourceType->ParameterizedTypeShape))
{
// Source type is also a parameterized type. Are the parameter types compatible?
if (pSourceType->RelatedParameterType->IsPointerType)
{
// If the parameter types are pointers, then only exact matches are correct.
// As we've already called AreTypesEquivalent at the start of this function,
// return false as the exact match case has already been handled.
// int** is not compatible with uint**, nor is int*[] oompatible with uint*[].
return false;
}
else
{
// Note that using AreTypesAssignableInternal with AssignmentVariation.AllowSizeEquivalence
// here handles array covariance as well as IFoo[] -> Foo[] etc. We are not using
// AssignmentVariation.BoxedSource because int[] is not assignable to object[].
return CastCache.AreTypesAssignableInternal(pSourceType->RelatedParameterType,
pTargetType->RelatedParameterType, AssignmentVariation.AllowSizeEquivalence);
}
}
// Can't cast a non-parameter type to a parameter type or a parameter type of different shape to a parameter type
return false;
}
if (pSourceType->IsArray)
{
// Target type is not an array. But we can still cast arrays to Object or System.Array.
return WellKnownEETypes.IsSystemObject(pTargetType) || WellKnownEETypes.IsSystemArray(pTargetType);
}
else if (pSourceType->IsParameterizedType)
{
return false;
}
//
// Handle cast to other (non-interface, non-array) cases.
//
if (pSourceType->IsValueType)
{
// Certain value types of the same size are treated as equivalent when the comparison is
// between array element types (indicated by fAllowSizeEquivalence). These are integer types
// of the same size (e.g. int and uint) and the base type of enums vs all integer types of the
// same size.
if (fAllowSizeEquivalence && pTargetType->IsValueType)
{
if (ArePrimitveTypesEquivalentSize(pSourceType, pTargetType))
return true;
// Non-identical value types aren't equivalent in any other case (since value types are
// sealed).
return false;
}
// If the source type is a value type but it's not boxed then we've run out of options: the types
// are not identical, the target type isn't an interface and we're not allowed to check whether
// the target type is a parent of this one since value types are sealed and thus the only matches
// would be against Object, ValueType or Enum, all of which are reference types and not compatible
// with non-boxed value types.
if (!fBoxedSource)
return false;
}
// Sub case of casting between two instantiations of the same delegate type where one or more of
// the type parameters have variance. Only interfaces and delegate types can have variance over
// their type parameters and we know that neither type is an interface due to checks above.
if (pTargetType->HasGenericVariance && pSourceType->HasGenericVariance)
{
// We've dealt with the identical case at the start of this method. And the regular path below
// will handle casting to Object, Delegate and MulticastDelegate. Since we don't support
// deriving from user delegate classes any further all we have to check here is that the
// uninstantiated generic delegate definitions are the same and the type parameters are
// compatible.
return TypesAreCompatibleViaGenericVariance(pSourceType, pTargetType);
}
// Is the source type derived from the target type?
if (IsDerived(pSourceType, pTargetType))
return true;
return false;
}
internal unsafe extern static object RhpNewArrayAlign8(EEType* pEEType, int length);
