public bool TryLookupExactMethodPointerForComponents(RuntimeTypeHandle declaringType, MethodNameAndSignature nameAndSignature, RuntimeTypeHandle[] genericMethodArgumentHandles, out IntPtr result)
{
int lookupHashcode = declaringType.GetHashCode();
NativeHashtable hashtable;
ExternalReferencesTable externalReferencesLookup;
HandleBasedGenericMethodLookup lookupData = new HandleBasedGenericMethodLookup(declaringType, nameAndSignature, genericMethodArgumentHandles);
foreach (NativeFormatModuleInfo module in ModuleList.EnumerateModules())
{
if (!GetHashtableFromBlob(module, ReflectionMapBlob.ExactMethodInstantiationsHashtable, out hashtable, out externalReferencesLookup))
{
continue;
}
var enumerator = hashtable.Lookup(lookupHashcode);
NativeParser entryParser;
while (!(entryParser = enumerator.GetNext()).IsNull)
{
if (!lookupData.MatchParsedEntry(ref entryParser, ref externalReferencesLookup, module.Handle))
{
continue;
}
// We found a match
result = externalReferencesLookup.GetIntPtrFromIndex(entryParser.GetUnsigned());
return(true);
}
}
result = IntPtr.Zero;
return(false);
}
/// <summary>
/// Get the NativeLayout for a type from a ReadyToRun image.
/// </summary>
public static bool TryGetMetadataNativeLayout(TypeDesc concreteType, out NativeFormatModuleInfo nativeLayoutInfoModule, out uint nativeLayoutInfoToken)
{
nativeLayoutInfoModule = null;
nativeLayoutInfoToken = 0;
#if SUPPORTS_NATIVE_METADATA_TYPE_LOADING
var nativeMetadataType = concreteType.GetTypeDefinition() as TypeSystem.NativeFormat.NativeFormatType;
if (nativeMetadataType == null)
{
return(false);
}
var canonForm = concreteType.ConvertToCanonForm(CanonicalFormKind.Specific);
var hashCode = canonForm.GetHashCode();
#if SUPPORTS_R2R_LOADING
foreach (var moduleInfo in ModuleList.EnumerateModules())
{
if (moduleInfo.MetadataReader == null)
{
continue;
}
ExternalReferencesTable externalFixupsTable;
NativeHashtable typeTemplatesHashtable = LoadHashtable(moduleInfo.Handle, ReflectionMapBlob.MetadataBasedTypeTemplateMap, out externalFixupsTable);
if (typeTemplatesHashtable.IsNull)
{
continue;
}
var enumerator = typeTemplatesHashtable.Lookup(hashCode);
var nativeMetadataUnit = nativeMetadataType.Context.ResolveMetadataUnit(moduleInfo);
NativeParser entryParser;
while (!(entryParser = enumerator.GetNext()).IsNull)
{
var entryTypeHandle = entryParser.GetUnsigned().AsHandle();
TypeDesc typeDesc = nativeMetadataUnit.GetType(entryTypeHandle);
Debug.Assert(typeDesc != null);
if (typeDesc == canonForm)
{
TypeLoaderLogger.WriteLine("Found metadata template for type " + concreteType.ToString() + ": " + typeDesc.ToString());
nativeLayoutInfoToken = entryParser.GetUnsigned();
if (nativeLayoutInfoToken == BadTokenFixupValue)
{
throw new BadImageFormatException();
}
nativeLayoutInfoModule = moduleHandle;
return(true);
}
}
}
#endif
#endif
return(false);
}
private unsafe bool TryGetStaticGenericMethodComponents(IntPtr methodDictionary, out RuntimeTypeHandle declaringType, out MethodNameAndSignature methodNameAndSignature, out RuntimeTypeHandle[] genericMethodArgumentHandles)
{
// Generic method dictionaries have a header that has the hash code in it. Locate the header
IntPtr dictionaryHeader = IntPtr.Subtract(methodDictionary, IntPtr.Size);
int lookupHashcode = *(int *)dictionaryHeader;
ExternalReferencesTable externalReferencesLookup;
NativeHashtable genericMethodsHashtable;
foreach (NativeFormatModuleInfo module in ModuleList.EnumerateModules())
{
if (!GetHashtableFromBlob(module, ReflectionMapBlob.GenericMethodsHashtable, out genericMethodsHashtable, out externalReferencesLookup))
{
continue;
}
var enumerator = genericMethodsHashtable.Lookup(lookupHashcode);
NativeParser entryParser;
while (!(entryParser = enumerator.GetNext()).IsNull)
{
// Is this entry the dictionary we are looking for?
uint dictionaryIndex = entryParser.GetUnsigned();
IntPtr parsedMethodDictionary = externalReferencesLookup.GetIntPtrFromIndex(dictionaryIndex);
if (parsedMethodDictionary != methodDictionary)
{
continue;
}
// We have a match - fill in the results
declaringType = externalReferencesLookup.GetRuntimeTypeHandleFromIndex(entryParser.GetUnsigned());
// Hash table names / sigs are indirected through to the native layout info
if (!TypeLoaderEnvironment.Instance.TryGetMethodNameAndSignatureFromNativeLayoutOffset(module.Handle, entryParser.GetUnsigned(), out methodNameAndSignature))
{
continue;
}
uint arity = entryParser.GetSequenceCount();
genericMethodArgumentHandles = new RuntimeTypeHandle[arity];
for (int i = 0; i < arity; i++)
{
genericMethodArgumentHandles[i] = externalReferencesLookup.GetRuntimeTypeHandleFromIndex(entryParser.GetUnsigned());
}
return(true);
}
}
declaringType = default(RuntimeTypeHandle);
methodNameAndSignature = null;
genericMethodArgumentHandles = null;
return(false);
}
public bool CompareMethodSignatures(RuntimeSignature signature1, RuntimeSignature signature2)
{
if (signature1.IsNativeLayoutSignature && signature2.IsNativeLayoutSignature)
{
if (signature1.StructuralEquals(signature2))
{
return(true);
}
NativeFormatModuleInfo module1 = ModuleList.GetModuleInfoByHandle(new TypeManagerHandle(signature1.ModuleHandle));
NativeReader reader1 = GetNativeLayoutInfoReader(signature1);
NativeParser parser1 = new NativeParser(reader1, signature1.NativeLayoutOffset);
NativeFormatModuleInfo module2 = ModuleList.GetModuleInfoByHandle(new TypeManagerHandle(signature2.ModuleHandle));
NativeReader reader2 = GetNativeLayoutInfoReader(signature2);
NativeParser parser2 = new NativeParser(reader2, signature2.NativeLayoutOffset);
return(CompareMethodSigs(parser1, module1, parser2, module2));
}
else if (signature1.IsNativeLayoutSignature)
{
int token = signature2.Token;
MetadataReader metadataReader = ModuleList.Instance.GetMetadataReaderForModule(new TypeManagerHandle(signature2.ModuleHandle));
MethodSignatureComparer comparer = new MethodSignatureComparer(metadataReader, token.AsHandle().ToMethodHandle(metadataReader));
return(comparer.IsMatchingNativeLayoutMethodSignature(signature1));
}
else if (signature2.IsNativeLayoutSignature)
{
int token = signature1.Token;
MetadataReader metadataReader = ModuleList.Instance.GetMetadataReaderForModule(new TypeManagerHandle(signature1.ModuleHandle));
MethodSignatureComparer comparer = new MethodSignatureComparer(metadataReader, token.AsHandle().ToMethodHandle(metadataReader));
return(comparer.IsMatchingNativeLayoutMethodSignature(signature2));
}
else
{
// For now, RuntimeSignatures are only used to compare for method signature equality (along with their Name)
// So we can implement this with the simple equals check
if (signature1.Token != signature2.Token)
{
return(false);
}
if (signature1.ModuleHandle != signature2.ModuleHandle)
{
return(false);
}
return(true);
}
}
private static TypeDesc TryGetTypeTemplate_Internal(TypeDesc concreteType, CanonicalFormKind kind, out NativeFormatModuleInfo nativeLayoutInfoModule, out uint nativeLayoutInfoToken)
{
nativeLayoutInfoModule = null;
nativeLayoutInfoToken = 0;
var canonForm = concreteType.ConvertToCanonForm(kind);
var hashCode = canonForm.GetHashCode();
foreach (NativeFormatModuleInfo moduleInfo in ModuleList.EnumerateModules())
{
ExternalReferencesTable externalFixupsTable;
NativeHashtable typeTemplatesHashtable = LoadHashtable(moduleInfo, ReflectionMapBlob.TypeTemplateMap, out externalFixupsTable);
if (typeTemplatesHashtable.IsNull)
{
continue;
}
var enumerator = typeTemplatesHashtable.Lookup(hashCode);
NativeParser entryParser;
while (!(entryParser = enumerator.GetNext()).IsNull)
{
RuntimeTypeHandle candidateTemplateTypeHandle = externalFixupsTable.GetRuntimeTypeHandleFromIndex(entryParser.GetUnsigned());
TypeDesc candidateTemplate = concreteType.Context.ResolveRuntimeTypeHandle(candidateTemplateTypeHandle);
if (canonForm == candidateTemplate.ConvertToCanonForm(kind))
{
TypeLoaderLogger.WriteLine("Found template for type " + concreteType.ToString() + ": " + candidateTemplate.ToString());
nativeLayoutInfoToken = entryParser.GetUnsigned();
if (nativeLayoutInfoToken == BadTokenFixupValue)
{
// TODO: once multifile gets fixed up, make this throw a BadImageFormatException
TypeLoaderLogger.WriteLine("ERROR: template not fixed up, skipping");
continue;
}
Debug.Assert(
(kind != CanonicalFormKind.Universal) ||
(kind == CanonicalFormKind.Universal && candidateTemplate == candidateTemplate.ConvertToCanonForm(kind)));
nativeLayoutInfoModule = moduleInfo;
return(candidateTemplate);
}
}
}
TypeLoaderLogger.WriteLine("ERROR: Cannot find a suitable template for type " + concreteType.ToString());
return(null);
}
protected override NamedTypeLookupResult CreateValueFromKey(RuntimeTypeHandle key)
{
int hashCode = GetKeyHashCode(key);
// Iterate over all modules, starting with the module that defines the EEType
foreach (IntPtr moduleHandle in ModuleList.Enumerate(RuntimeAugments.GetModuleFromTypeHandle(key)))
{
NativeReader typeMapReader;
if (TryGetNativeReaderForBlob(moduleHandle, ReflectionMapBlob.TypeMap, out typeMapReader))
{
NativeParser typeMapParser = new NativeParser(typeMapReader, 0);
NativeHashtable typeHashtable = new NativeHashtable(typeMapParser);
ExternalReferencesTable externalReferences = default(ExternalReferencesTable);
externalReferences.InitializeCommonFixupsTable(moduleHandle);
var lookup = typeHashtable.Lookup(hashCode);
NativeParser entryParser;
while (!(entryParser = lookup.GetNext()).IsNull)
{
RuntimeTypeHandle foundType = externalReferences.GetRuntimeTypeHandleFromIndex(entryParser.GetUnsigned());
if (foundType.Equals(key))
{
Handle entryMetadataHandle = entryParser.GetUnsigned().AsHandle();
if (entryMetadataHandle.HandleType == HandleType.TypeDefinition)
{
MetadataReader metadataReader = ModuleList.Instance.GetMetadataReaderForModule(moduleHandle);
return(new NamedTypeLookupResult()
{
MetadataReader = metadataReader,
TypeDefinition = entryMetadataHandle.ToTypeDefinitionHandle(metadataReader),
RuntimeTypeHandle = key,
RuntimeTypeHandleHashcode = hashCode
});
}
}
}
}
}
return(new NamedTypeLookupResult()
{
RuntimeTypeHandle = key,
RuntimeTypeHandleHashcode = hashCode
});
}
/// <summary>
/// Locate the containing module for a given metadata reader. Assert when not found.
/// </summary>
/// <param name="reader">Metadata reader to look up</param>
/// <returns>Module handle of the module containing the given reader</returns>
public static EcmaModuleInfo GetModuleInfoForMetadataReader(this ModuleList moduleList, MetadataReader reader)
{
foreach (ModuleInfo moduleInfo in moduleList.GetLoadedModuleMapInternal().Modules)
{
EcmaModuleInfo ecmaModuleInfo = moduleInfo as EcmaModuleInfo;
if (ecmaModuleInfo == null)
{
continue;
}
if (ecmaModuleInfo.MetadataReader == reader)
{
return(ecmaModuleInfo);
}
}
// We should never have a reader that is not associated with a module (where does it come from?!)
Debug.Assert(false);
return(null);
}
internal unsafe bool TryGetStaticGenericTypeForComponents(GenericTypeLookupData lookupData, out RuntimeTypeHandle runtimeTypeHandle)
{
// Search the hashtable for a generic instantiation match
// TODO multi-file: consider whether we can limit the search somehow,
// i.e. not look at all the modules
runtimeTypeHandle = default(RuntimeTypeHandle);
NativeHashtable genericsHashtable;
ExternalReferencesTable externalReferencesLookup;
foreach (NativeFormatModuleInfo module in ModuleList.EnumerateModules())
{
if (!GetHashtableFromBlob(module, ReflectionMapBlob.GenericsHashtable, out genericsHashtable, out externalReferencesLookup))
{
continue;
}
int lookupHashcode = lookupData.LookupHashCode();
var enumerator = genericsHashtable.Lookup(lookupHashcode);
NativeParser entryParser;
while (!(entryParser = enumerator.GetNext()).IsNull)
{
RuntimeTypeHandle tentativeType = externalReferencesLookup.GetRuntimeTypeHandleFromIndex(entryParser.GetUnsigned());
if (!lookupData.MatchParsedEntry(tentativeType))
{
continue;
}
runtimeTypeHandle = tentativeType;
Debug.Assert(RuntimeAugments.IsGenericType(runtimeTypeHandle));
return(true);
}
}
return(false);
}
private static bool TryGetStaticGenericMethodDictionaryForComponents(GenericMethodLookupData lookupData, out IntPtr result)
{
// Search the hashtable for a generic instantiation match
ExternalReferencesTable externalReferencesLookup;
NativeHashtable genericMethodsHashtable;
foreach (NativeFormatModuleInfo module in ModuleList.EnumerateModules())
{
if (!GetHashtableFromBlob(module, ReflectionMapBlob.GenericMethodsHashtable, out genericMethodsHashtable, out externalReferencesLookup))
{
continue;
}
int lookupHashcode = lookupData.LookupHashCode();
var enumerator = genericMethodsHashtable.Lookup(lookupHashcode);
NativeParser entryParser;
while (!(entryParser = enumerator.GetNext()).IsNull)
{
uint dictionaryIndex = entryParser.GetUnsigned();
if (!lookupData.MatchParsedEntry(ref entryParser, ref externalReferencesLookup, module.Handle))
{
continue;
}
// Current entry matched all inputs, return success
result = externalReferencesLookup.GetIntPtrFromIndex(dictionaryIndex);
return(true);
}
}
result = IntPtr.Zero;
return(false);
}
/// <summary>
/// Try to look up field access info for given canon in metadata blobs for all available modules.
/// </summary>
/// <param name="metadataReader">Metadata reader for the declaring type</param>
/// <param name="declaringTypeHandle">Declaring type for the method</param>
/// <param name="fieldHandle">Field handle</param>
/// <param name="canonFormKind">Canonical form to use</param>
/// <param name="fieldAccessMetadata">Output - metadata information for field accessor construction</param>
/// <returns>true when found, false otherwise</returns>
private static unsafe bool TryGetFieldAccessMetadataFromFieldAccessMap(
MetadataReader metadataReader,
RuntimeTypeHandle declaringTypeHandle,
FieldHandle fieldHandle,
CanonicalFormKind canonFormKind,
ref FieldAccessMetadata fieldAccessMetadata)
{
CanonicallyEquivalentEntryLocator canonWrapper = new CanonicallyEquivalentEntryLocator(declaringTypeHandle, canonFormKind);
string fieldName = null;
RuntimeTypeHandle declaringTypeHandleDefinition = TypeLoaderEnvironment.GetTypeDefinition(declaringTypeHandle);
foreach (NativeFormatModuleInfo mappingTableModule in ModuleList.EnumerateModules(RuntimeAugments.GetModuleFromTypeHandle(declaringTypeHandle)))
{
NativeReader fieldMapReader;
if (!TryGetNativeReaderForBlob(mappingTableModule, ReflectionMapBlob.FieldAccessMap, out fieldMapReader))
{
continue;
}
NativeParser fieldMapParser = new NativeParser(fieldMapReader, 0);
NativeHashtable fieldHashtable = new NativeHashtable(fieldMapParser);
ExternalReferencesTable externalReferences = default(ExternalReferencesTable);
if (!externalReferences.InitializeCommonFixupsTable(mappingTableModule))
{
continue;
}
var lookup = fieldHashtable.Lookup(canonWrapper.LookupHashCode);
NativeParser entryParser;
while (!(entryParser = lookup.GetNext()).IsNull)
{
// Grammar of a hash table entry:
// Flags + DeclaringType + MdHandle or Name + Cookie or Ordinal or Offset
FieldTableFlags entryFlags = (FieldTableFlags)entryParser.GetUnsigned();
if ((canonFormKind == CanonicalFormKind.Universal) != ((entryFlags & FieldTableFlags.IsUniversalCanonicalEntry) != 0))
{
continue;
}
RuntimeTypeHandle entryDeclaringTypeHandle = externalReferences.GetRuntimeTypeHandleFromIndex(entryParser.GetUnsigned());
if (!entryDeclaringTypeHandle.Equals(declaringTypeHandle) &&
!canonWrapper.IsCanonicallyEquivalent(entryDeclaringTypeHandle))
{
continue;
}
if ((entryFlags & FieldTableFlags.HasMetadataHandle) != 0)
{
Handle entryFieldHandle = (((int)HandleType.Field << 24) | (int)entryParser.GetUnsigned()).AsHandle();
if (!fieldHandle.Equals(entryFieldHandle))
{
continue;
}
}
else
{
if (fieldName == null)
{
QTypeDefinition qTypeDefinition;
bool success = Instance.TryGetMetadataForNamedType(
declaringTypeHandleDefinition,
out qTypeDefinition);
Debug.Assert(success);
MetadataReader nativeFormatMetadataReader = qTypeDefinition.NativeFormatReader;
fieldName = nativeFormatMetadataReader.GetString(fieldHandle.GetField(nativeFormatMetadataReader).Name);
}
string entryFieldName = entryParser.GetString();
if (fieldName != entryFieldName)
{
continue;
}
}
int fieldOffset;
IntPtr fieldAddressCookie = IntPtr.Zero;
if (canonFormKind == CanonicalFormKind.Universal)
{
if (!TypeLoaderEnvironment.Instance.TryGetFieldOffset(declaringTypeHandle, entryParser.GetUnsigned() /* field ordinal */, out fieldOffset))
{
Debug.Assert(false);
return(false);
}
}
else
{
if ((entryFlags & FieldTableFlags.FieldOffsetEncodedDirectly) != 0)
{
fieldOffset = (int)entryParser.GetUnsigned();
}
else
{
fieldOffset = 0;
fieldAddressCookie = externalReferences.GetAddressFromIndex(entryParser.GetUnsigned());
FieldTableFlags storageClass = entryFlags & FieldTableFlags.StorageClass;
if (storageClass == FieldTableFlags.GCStatic || storageClass == FieldTableFlags.ThreadStatic)
{
fieldOffset = (int)entryParser.GetUnsigned();
}
}
}
fieldAccessMetadata.MappingTableModule = mappingTableModule.Handle;
fieldAccessMetadata.Cookie = fieldAddressCookie;
fieldAccessMetadata.Flags = entryFlags;
fieldAccessMetadata.Offset = fieldOffset;
return(true);
}
}
return(false);
}
public TypeLoaderEnvironment()
{
ModuleList = new ModuleList();
}
private unsafe bool ResolveGenericVirtualMethodTarget_Static(RuntimeTypeHandle targetTypeHandle, RuntimeTypeHandle declaringType, RuntimeTypeHandle[] genericArguments, MethodNameAndSignature callingMethodNameAndSignature, out IntPtr methodPointer, out IntPtr dictionaryPointer)
{
methodPointer = dictionaryPointer = IntPtr.Zero;
// Get the open type definition of the containing type of the generic virtual method being resolved
RuntimeTypeHandle openCallingTypeHandle = GetTypeDefinition(declaringType);
// Get the open type definition of the current type of the object instance on which the GVM is being resolved
RuntimeTypeHandle openTargetTypeHandle = GetTypeDefinition(targetTypeHandle);
int hashCode = openCallingTypeHandle.GetHashCode();
hashCode = ((hashCode << 13) ^ hashCode) ^ openTargetTypeHandle.GetHashCode();
#if GVM_RESOLUTION_TRACE
Debug.WriteLine("GVM Target Resolution = " + GetTypeNameDebug(targetTypeHandle) + "." + callingMethodNameAndSignature.Name);
#endif
foreach (NativeFormatModuleInfo module in ModuleList.EnumerateModules(RuntimeAugments.GetModuleFromTypeHandle(openTargetTypeHandle)))
{
NativeReader gvmTableReader;
if (!TryGetNativeReaderForBlob(module, ReflectionMapBlob.GenericVirtualMethodTable, out gvmTableReader))
{
continue;
}
NativeReader nativeLayoutReader;
if (!TryGetNativeReaderForBlob(module, ReflectionMapBlob.NativeLayoutInfo, out nativeLayoutReader))
{
continue;
}
NativeParser gvmTableParser = new NativeParser(gvmTableReader, 0);
NativeHashtable gvmHashtable = new NativeHashtable(gvmTableParser);
ExternalReferencesTable extRefs = default(ExternalReferencesTable);
extRefs.InitializeCommonFixupsTable(module);
var lookup = gvmHashtable.Lookup(hashCode);
NativeParser entryParser;
while (!(entryParser = lookup.GetNext()).IsNull)
{
RuntimeTypeHandle parsedCallingTypeHandle = extRefs.GetRuntimeTypeHandleFromIndex(entryParser.GetUnsigned());
if (!parsedCallingTypeHandle.Equals(openCallingTypeHandle))
{
continue;
}
RuntimeTypeHandle parsedTargetTypeHandle = extRefs.GetRuntimeTypeHandleFromIndex(entryParser.GetUnsigned());
if (!parsedTargetTypeHandle.Equals(openTargetTypeHandle))
{
continue;
}
uint parsedCallingNameAndSigToken = entryParser.GetUnsigned();
MethodNameAndSignature parsedCallingNameAndSignature = GetMethodNameAndSignatureFromNativeReader(nativeLayoutReader, module.Handle, parsedCallingNameAndSigToken);
if (!parsedCallingNameAndSignature.Equals(callingMethodNameAndSignature))
{
continue;
}
uint parsedTargetMethodNameAndSigToken = entryParser.GetUnsigned();
MethodNameAndSignature targetMethodNameAndSignature = GetMethodNameAndSignatureFromNativeReader(nativeLayoutReader, module.Handle, parsedTargetMethodNameAndSigToken);
Debug.Assert(targetMethodNameAndSignature != null);
if (!TryGetGenericVirtualMethodPointer(targetTypeHandle, targetMethodNameAndSignature, genericArguments, out methodPointer, out dictionaryPointer))
{
var sb = new System.Text.StringBuilder();
sb.AppendLine("Generic virtual method pointer lookup failure.");
sb.AppendLine();
sb.AppendLine("Declaring type handle: " + declaringType.LowLevelToStringRawEETypeAddress());
sb.AppendLine("Target type handle: " + targetTypeHandle.LowLevelToStringRawEETypeAddress());
sb.AppendLine("Method name: " + targetMethodNameAndSignature.Name);
sb.AppendLine("Instantiation:");
for (int i = 0; i < genericArguments.Length; i++)
{
sb.AppendLine(" Argument " + i.LowLevelToString() + ": " + genericArguments[i].LowLevelToStringRawEETypeAddress());
}
Environment.FailFast(sb.ToString());
}
return(true);
}
}
return(false);
}
/// <summary>
/// Try to look up non-gc/gc static effective field bases for a non-generic non-dynamic type.
/// </summary>
/// <param name="declaringTypeHandle">Declaring type for the method</param>
/// <param name="fieldAccessKind">type of static base to find</param>
/// <param name="staticsRegionAddress">Output - statics region address info</param>
/// <returns>true when found, false otherwise</returns>
private unsafe static bool TryGetStaticFieldBaseFromFieldAccessMap(
RuntimeTypeHandle declaringTypeHandle,
FieldAccessStaticDataKind fieldAccessKind,
out IntPtr staticsRegionAddress)
{
staticsRegionAddress = IntPtr.Zero;
byte *comparableStaticRegionAddress = null;
CanonicallyEquivalentEntryLocator canonWrapper = new CanonicallyEquivalentEntryLocator(declaringTypeHandle, CanonicalFormKind.Specific);
// This function only finds results for non-dynamic, non-generic types
if (RuntimeAugments.IsDynamicType(declaringTypeHandle) || RuntimeAugments.IsGenericType(declaringTypeHandle))
{
return(false);
}
foreach (IntPtr mappingTableModule in ModuleList.Enumerate(RuntimeAugments.GetModuleFromTypeHandle(declaringTypeHandle)))
{
NativeReader fieldMapReader;
if (!TryGetNativeReaderForBlob(mappingTableModule, ReflectionMapBlob.FieldAccessMap, out fieldMapReader))
{
continue;
}
NativeParser fieldMapParser = new NativeParser(fieldMapReader, 0);
NativeHashtable fieldHashtable = new NativeHashtable(fieldMapParser);
ExternalReferencesTable externalReferences = default(ExternalReferencesTable);
if (!externalReferences.InitializeCommonFixupsTable(mappingTableModule))
{
continue;
}
var lookup = fieldHashtable.Lookup(canonWrapper.LookupHashCode);
NativeParser entryParser;
while (!(entryParser = lookup.GetNext()).IsNull)
{
// Grammar of a hash table entry:
// Flags + DeclaringType + MdHandle or Name + Cookie or Ordinal or Offset
FieldTableFlags entryFlags = (FieldTableFlags)entryParser.GetUnsigned();
Debug.Assert(!entryFlags.HasFlag(FieldTableFlags.IsUniversalCanonicalEntry));
if (!entryFlags.HasFlag(FieldTableFlags.Static))
{
continue;
}
switch (fieldAccessKind)
{
case FieldAccessStaticDataKind.NonGC:
if (entryFlags.HasFlag(FieldTableFlags.IsGcSection))
{
continue;
}
if (entryFlags.HasFlag(FieldTableFlags.ThreadStatic))
{
continue;
}
break;
case FieldAccessStaticDataKind.GC:
if (!entryFlags.HasFlag(FieldTableFlags.IsGcSection))
{
continue;
}
if (entryFlags.HasFlag(FieldTableFlags.ThreadStatic))
{
continue;
}
break;
case FieldAccessStaticDataKind.TLS:
default:
// TODO! TLS statics
Environment.FailFast("TLS static field access not yet supported");
return(false);
}
RuntimeTypeHandle entryDeclaringTypeHandle = externalReferences.GetRuntimeTypeHandleFromIndex(entryParser.GetUnsigned());
if (!entryDeclaringTypeHandle.Equals(declaringTypeHandle))
{
continue;
}
if (entryFlags.HasFlag(FieldTableFlags.HasMetadataHandle))
{
// skip metadata handle
entryParser.GetUnsigned();
}
else
{
// skip field name
entryParser.SkipString();
}
int cookieOrOffsetOrOrdinal = (int)entryParser.GetUnsigned();
int fieldOffset = (int)externalReferences.GetRvaFromIndex((uint)cookieOrOffsetOrOrdinal);
IntPtr fieldAddress = RvaToNonGenericStaticFieldAddress(
mappingTableModule, fieldOffset);
if ((comparableStaticRegionAddress == null) || (comparableStaticRegionAddress > fieldAddress.ToPointer()))
{
comparableStaticRegionAddress = (byte *)fieldAddress.ToPointer();
}
}
// Static fields for a type can only be found in at most one module
if (comparableStaticRegionAddress != null)
{
break;
}
}
if (comparableStaticRegionAddress != null)
{
staticsRegionAddress = new IntPtr(comparableStaticRegionAddress);
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// Try to look up field acccess info for given canon in metadata blobs for all available modules.
/// </summary>
/// <param name="metadataReader">Metadata reader for the declaring type</param>
/// <param name="declaringTypeHandle">Declaring type for the method</param>
/// <param name="fieldHandle">Field handle</param>
/// <param name="canonFormKind">Canonical form to use</param>
/// <param name="fieldAccessMetadata">Output - metadata information for field accessor construction</param>
/// <returns>true when found, false otherwise</returns>
private static bool TryGetFieldAccessMetadataFromFieldAccessMap(
MetadataReader metadataReader,
RuntimeTypeHandle declaringTypeHandle,
FieldHandle fieldHandle,
CanonicalFormKind canonFormKind,
ref FieldAccessMetadata fieldAccessMetadata)
{
CanonicallyEquivalentEntryLocator canonWrapper = new CanonicallyEquivalentEntryLocator(declaringTypeHandle, canonFormKind);
IntPtr fieldHandleModule = ModuleList.Instance.GetModuleForMetadataReader(metadataReader);
bool isDynamicType = RuntimeAugments.IsDynamicType(declaringTypeHandle);
string fieldName = null;
RuntimeTypeHandle declaringTypeHandleDefinition = Instance.GetTypeDefinition(declaringTypeHandle);
foreach (IntPtr mappingTableModule in ModuleList.Enumerate(RuntimeAugments.GetModuleFromTypeHandle(declaringTypeHandle)))
{
NativeReader fieldMapReader;
if (!TryGetNativeReaderForBlob(mappingTableModule, ReflectionMapBlob.FieldAccessMap, out fieldMapReader))
{
continue;
}
NativeParser fieldMapParser = new NativeParser(fieldMapReader, 0);
NativeHashtable fieldHashtable = new NativeHashtable(fieldMapParser);
ExternalReferencesTable externalReferences = default(ExternalReferencesTable);
if (!externalReferences.InitializeCommonFixupsTable(mappingTableModule))
{
continue;
}
var lookup = fieldHashtable.Lookup(canonWrapper.LookupHashCode);
NativeParser entryParser;
while (!(entryParser = lookup.GetNext()).IsNull)
{
// Grammar of a hash table entry:
// Flags + DeclaringType + MdHandle or Name + Cookie or Ordinal or Offset
FieldTableFlags entryFlags = (FieldTableFlags)entryParser.GetUnsigned();
if ((canonFormKind == CanonicalFormKind.Universal) != entryFlags.HasFlag(FieldTableFlags.IsUniversalCanonicalEntry))
{
continue;
}
RuntimeTypeHandle entryDeclaringTypeHandle = externalReferences.GetRuntimeTypeHandleFromIndex(entryParser.GetUnsigned());
if (!entryDeclaringTypeHandle.Equals(declaringTypeHandle) &&
!canonWrapper.IsCanonicallyEquivalent(entryDeclaringTypeHandle))
{
continue;
}
if (entryFlags.HasFlag(FieldTableFlags.HasMetadataHandle))
{
Handle entryFieldHandle = (((int)HandleType.Field << 24) | (int)entryParser.GetUnsigned()).AsHandle();
if (!fieldHandle.Equals(entryFieldHandle))
{
continue;
}
}
else
{
if (fieldName == null)
{
MetadataReader mdReader;
TypeDefinitionHandle typeDefHandleUnused;
bool success = Instance.TryGetMetadataForNamedType(
declaringTypeHandleDefinition,
out mdReader,
out typeDefHandleUnused);
Debug.Assert(success);
fieldName = mdReader.GetString(fieldHandle.GetField(mdReader).Name);
}
string entryFieldName = entryParser.GetString();
if (fieldName != entryFieldName)
{
continue;
}
}
int cookieOrOffsetOrOrdinal = (int)entryParser.GetUnsigned();
int fieldOffset;
IntPtr fieldAddressCookie = IntPtr.Zero;
if (canonFormKind == CanonicalFormKind.Universal)
{
if (!TypeLoaderEnvironment.Instance.TryGetFieldOffset(declaringTypeHandle, (uint)cookieOrOffsetOrOrdinal, out fieldOffset))
{
Debug.Assert(false);
return(false);
}
}
else
{
#if CORERT
fieldOffset = cookieOrOffsetOrOrdinal;
#else
fieldOffset = (int)externalReferences.GetRvaFromIndex((uint)cookieOrOffsetOrOrdinal);
#endif
}
if ((entryFlags & FieldTableFlags.StorageClass) == FieldTableFlags.ThreadStatic)
{
if (canonFormKind != CanonicalFormKind.Universal)
{
fieldAddressCookie = RvaToNonGenericStaticFieldAddress(mappingTableModule, fieldOffset);
}
if (!entryDeclaringTypeHandle.Equals(declaringTypeHandle))
{
// In this case we didn't find an exact match, but we did find a canonically equivalent match
// We might be in the dynamic type case, or the canonically equivalent, but not the same case.
if (!RuntimeAugments.IsDynamicType(declaringTypeHandle))
{
int offsetToCreateCookieFor = fieldOffset;
// We're working with a statically generated type, but we didn't find an exact match in the tables
if (canonFormKind != CanonicalFormKind.Universal)
{
offsetToCreateCookieFor = checked ((int)TypeLoaderEnvironment.GetThreadStaticTypeOffsetFromThreadStaticCookie(fieldAddressCookie));
}
fieldAddressCookie = TypeLoaderEnvironment.Instance.TryGetThreadStaticFieldOffsetCookieForTypeAndFieldOffset(declaringTypeHandle, checked ((uint)offsetToCreateCookieFor));
}
}
}
fieldAccessMetadata.MappingTableModule = mappingTableModule;
fieldAccessMetadata.Cookie = fieldAddressCookie;
fieldAccessMetadata.Flags = entryFlags;
fieldAccessMetadata.Offset = fieldOffset;
return(true);
}
}
return(false);
}
public TypeLoaderEnvironment()
{
ModuleList = new ModuleList();
}
private static InstantiatedMethod TryGetGenericMethodTemplate_Internal(InstantiatedMethod concreteMethod, CanonicalFormKind kind, out NativeFormatModuleInfo nativeLayoutInfoModule, out uint nativeLayoutInfoToken)
{
nativeLayoutInfoModule = null;
nativeLayoutInfoToken = 0;
var canonForm = concreteMethod.GetCanonMethodTarget(kind);
var hashCode = canonForm.GetHashCode();
foreach (NativeFormatModuleInfo moduleInfo in ModuleList.EnumerateModules())
{
NativeReader nativeLayoutReader = TypeLoaderEnvironment.GetNativeLayoutInfoReader(moduleInfo.Handle);
if (nativeLayoutReader == null)
{
continue;
}
NativeHashtable genericMethodTemplatesHashtable = LoadHashtable(moduleInfo, ReflectionMapBlob.GenericMethodsTemplateMap, out _);
if (genericMethodTemplatesHashtable.IsNull)
{
continue;
}
var context = new NativeLayoutInfoLoadContext
{
_typeSystemContext = concreteMethod.Context,
_typeArgumentHandles = concreteMethod.OwningType.Instantiation,
_methodArgumentHandles = concreteMethod.Instantiation,
_module = moduleInfo
};
var enumerator = genericMethodTemplatesHashtable.Lookup(hashCode);
NativeParser entryParser;
while (!(entryParser = enumerator.GetNext()).IsNull)
{
var methodSignatureParser = new NativeParser(nativeLayoutReader, entryParser.GetUnsigned());
// Get the unified generic method holder and convert it to its canonical form
var candidateTemplate = (InstantiatedMethod)context.GetMethod(ref methodSignatureParser);
Debug.Assert(candidateTemplate.Instantiation.Length > 0);
if (canonForm == candidateTemplate.GetCanonMethodTarget(kind))
{
TypeLoaderLogger.WriteLine("Found template for generic method " + concreteMethod.ToString() + ": " + candidateTemplate.ToString());
nativeLayoutInfoModule = moduleInfo;
nativeLayoutInfoToken = entryParser.GetUnsigned();
if (nativeLayoutInfoToken == BadTokenFixupValue)
{
// TODO: once multifile gets fixed up, make this throw a BadImageFormatException
TypeLoaderLogger.WriteLine("ERROR: template not fixed up, skipping");
continue;
}
Debug.Assert(
(kind != CanonicalFormKind.Universal) ||
(kind == CanonicalFormKind.Universal && candidateTemplate == candidateTemplate.GetCanonMethodTarget(kind)));
return(candidateTemplate);
}
}
}
TypeLoaderLogger.WriteLine("ERROR: Cannot find a suitable template for generic method " + concreteMethod.ToString());
return(null);
}
/// <summary>
/// Try to look up non-gc/gc static effective field bases for a non-generic non-dynamic type.
/// </summary>
/// <param name="declaringTypeHandle">Declaring type for the method</param>
/// <param name="fieldAccessKind">type of static base to find</param>
/// <param name="staticsRegionAddress">Output - statics region address info</param>
/// <returns>true when found, false otherwise</returns>
private static unsafe bool TryGetStaticFieldBaseFromFieldAccessMap(
RuntimeTypeHandle declaringTypeHandle,
FieldAccessStaticDataKind fieldAccessKind,
out IntPtr staticsRegionAddress)
{
staticsRegionAddress = IntPtr.Zero;
CanonicallyEquivalentEntryLocator canonWrapper = new CanonicallyEquivalentEntryLocator(declaringTypeHandle, CanonicalFormKind.Specific);
// This function only finds results for non-dynamic, non-generic types
if (RuntimeAugments.IsDynamicType(declaringTypeHandle) || RuntimeAugments.IsGenericType(declaringTypeHandle))
{
return(false);
}
foreach (NativeFormatModuleInfo mappingTableModule in ModuleList.EnumerateModules(RuntimeAugments.GetModuleFromTypeHandle(declaringTypeHandle)))
{
NativeReader fieldMapReader;
if (!TryGetNativeReaderForBlob(mappingTableModule, ReflectionMapBlob.FieldAccessMap, out fieldMapReader))
{
continue;
}
NativeParser fieldMapParser = new NativeParser(fieldMapReader, 0);
NativeHashtable fieldHashtable = new NativeHashtable(fieldMapParser);
ExternalReferencesTable externalReferences = default(ExternalReferencesTable);
if (!externalReferences.InitializeCommonFixupsTable(mappingTableModule))
{
continue;
}
var lookup = fieldHashtable.Lookup(canonWrapper.LookupHashCode);
NativeParser entryParser;
while (!(entryParser = lookup.GetNext()).IsNull)
{
// Grammar of a hash table entry:
// Flags + DeclaringType + MdHandle or Name + Cookie or Ordinal or Offset
FieldTableFlags entryFlags = (FieldTableFlags)entryParser.GetUnsigned();
FieldTableFlags storageClass = entryFlags & FieldTableFlags.StorageClass;
Debug.Assert((entryFlags & FieldTableFlags.IsUniversalCanonicalEntry) == 0);
if (storageClass == FieldTableFlags.Instance)
{
continue;
}
switch (fieldAccessKind)
{
case FieldAccessStaticDataKind.NonGC:
if (storageClass != FieldTableFlags.NonGCStatic)
{
continue;
}
break;
case FieldAccessStaticDataKind.GC:
if (storageClass != FieldTableFlags.GCStatic)
{
continue;
}
break;
case FieldAccessStaticDataKind.TLS:
if (storageClass != FieldTableFlags.ThreadStatic)
{
continue;
}
break;
default:
return(false);
}
RuntimeTypeHandle entryDeclaringTypeHandle = externalReferences.GetRuntimeTypeHandleFromIndex(entryParser.GetUnsigned());
if (!entryDeclaringTypeHandle.Equals(declaringTypeHandle))
{
continue;
}
if ((entryFlags & FieldTableFlags.HasMetadataHandle) != 0)
{
// skip metadata handle
entryParser.GetUnsigned();
}
else
{
// skip field name
entryParser.SkipString();
}
IntPtr fieldAddress = IntPtr.Zero;
if ((entryFlags & FieldTableFlags.FieldOffsetEncodedDirectly) == 0)
{
fieldAddress = externalReferences.GetAddressFromIndex(entryParser.GetUnsigned());
}
if (fieldAddress != IntPtr.Zero)
{
staticsRegionAddress = fieldAddress;
break;
}
}
// Static fields for a type can only be found in at most one module
if (staticsRegionAddress != IntPtr.Zero)
{
break;
}
}
return(staticsRegionAddress != IntPtr.Zero);
}
private unsafe bool ResolveGenericVirtualMethodTarget_Static(RuntimeTypeHandle targetTypeHandle, RuntimeTypeHandle declaringType, RuntimeTypeHandle[] genericArguments, MethodNameAndSignature callingMethodNameAndSignature, out IntPtr methodPointer, out IntPtr dictionaryPointer)
{
methodPointer = dictionaryPointer = IntPtr.Zero;
// Get the open type definition of the containing type of the generic virtual method being resolved
RuntimeTypeHandle openCallingTypeHandle = GetTypeDefinition(declaringType);
// Get the open type definition of the current type of the object instance on which the GVM is being resolved
RuntimeTypeHandle openTargetTypeHandle = GetTypeDefinition(targetTypeHandle);
int hashCode = openCallingTypeHandle.GetHashCode();
hashCode = ((hashCode << 13) ^ hashCode) ^ openTargetTypeHandle.GetHashCode();
#if REFLECTION_EXECUTION_TRACE
ReflectionExecutionLogger.WriteLine("GVM Target Resolution = " + GetTypeNameDebug(targetTypeHandle) + "." + callingMethodNameAndSignature.Name);
#endif
foreach (NativeFormatModuleInfo module in ModuleList.EnumerateModules(RuntimeAugments.GetModuleFromTypeHandle(openTargetTypeHandle)))
{
NativeReader gvmTableReader;
if (!TryGetNativeReaderForBlob(module, ReflectionMapBlob.GenericVirtualMethodTable, out gvmTableReader))
{
continue;
}
NativeReader nativeLayoutReader;
if (!TryGetNativeReaderForBlob(module, ReflectionMapBlob.NativeLayoutInfo, out nativeLayoutReader))
{
continue;
}
NativeParser gvmTableParser = new NativeParser(gvmTableReader, 0);
NativeHashtable gvmHashtable = new NativeHashtable(gvmTableParser);
ExternalReferencesTable extRefs = default(ExternalReferencesTable);
extRefs.InitializeCommonFixupsTable(module);
var lookup = gvmHashtable.Lookup(hashCode);
NativeParser entryParser;
while (!(entryParser = lookup.GetNext()).IsNull)
{
RuntimeTypeHandle parsedCallingTypeHandle = extRefs.GetRuntimeTypeHandleFromIndex(entryParser.GetUnsigned());
if (!parsedCallingTypeHandle.Equals(openCallingTypeHandle))
{
continue;
}
RuntimeTypeHandle parsedTargetTypeHandle = extRefs.GetRuntimeTypeHandleFromIndex(entryParser.GetUnsigned());
if (!parsedTargetTypeHandle.Equals(openTargetTypeHandle))
{
continue;
}
uint parsedCallingNameAndSigToken = extRefs.GetExternalNativeLayoutOffset(entryParser.GetUnsigned());
MethodNameAndSignature parsedCallingNameAndSignature = GetMethodNameAndSignatureFromNativeReader(nativeLayoutReader, module.Handle, parsedCallingNameAndSigToken);
if (!parsedCallingNameAndSignature.Equals(callingMethodNameAndSignature))
{
continue;
}
uint parsedTargetMethodNameAndSigToken = extRefs.GetExternalNativeLayoutOffset(entryParser.GetUnsigned());
MethodNameAndSignature targetMethodNameAndSignature = GetMethodNameAndSignatureFromNativeReader(nativeLayoutReader, module.Handle, parsedTargetMethodNameAndSigToken);
Debug.Assert(targetMethodNameAndSignature != null);
if (!TryGetGenericVirtualMethodPointer(targetTypeHandle, targetMethodNameAndSignature, genericArguments, out methodPointer, out dictionaryPointer))
{
Environment.FailFast("GVM method pointer lookup failure");
}
return(true);
}
}
return(false);
}
private bool ResolveInterfaceGenericVirtualMethodSlot_Static(RuntimeTypeHandle targetTypeHandle, ref RuntimeTypeHandle declaringType, ref MethodNameAndSignature methodNameAndSignature)
{
// Get the open type definition of the containing type of the generic virtual method being resolved
RuntimeTypeHandle openCallingTypeHandle = GetTypeDefinition(declaringType);
// Get the open type definition of the current type of the object instance on which the GVM is being resolved
RuntimeTypeHandle openTargetTypeHandle;
RuntimeTypeHandle[] targetTypeInstantiation;
openTargetTypeHandle = GetOpenTypeDefinition(targetTypeHandle, out targetTypeInstantiation);
#if REFLECTION_EXECUTION_TRACE
ReflectionExecutionLogger.WriteLine("INTERFACE GVM call = " + GetTypeNameDebug(declaringType) + "." + methodNameAndSignature.Name);
#endif
foreach (NativeFormatModuleInfo module in ModuleList.EnumerateModules(RuntimeAugments.GetModuleFromTypeHandle(openTargetTypeHandle)))
{
NativeReader gvmTableReader;
if (!TryGetNativeReaderForBlob(module, ReflectionMapBlob.InterfaceGenericVirtualMethodTable, out gvmTableReader))
{
continue;
}
NativeReader nativeLayoutReader;
if (!TryGetNativeReaderForBlob(module, ReflectionMapBlob.NativeLayoutInfo, out nativeLayoutReader))
{
continue;
}
NativeParser gvmTableParser = new NativeParser(gvmTableReader, 0);
NativeHashtable gvmHashtable = new NativeHashtable(gvmTableParser);
ExternalReferencesTable extRefs = default(ExternalReferencesTable);
extRefs.InitializeCommonFixupsTable(module);
var lookup = gvmHashtable.Lookup(openCallingTypeHandle.GetHashCode());
NativeParser entryParser;
while (!(entryParser = lookup.GetNext()).IsNull)
{
RuntimeTypeHandle interfaceTypeHandle = extRefs.GetRuntimeTypeHandleFromIndex(entryParser.GetUnsigned());
if (!openCallingTypeHandle.Equals(interfaceTypeHandle))
{
continue;
}
uint nameAndSigToken = extRefs.GetExternalNativeLayoutOffset(entryParser.GetUnsigned());
MethodNameAndSignature interfaceMethodNameAndSignature = GetMethodNameAndSignatureFromNativeReader(nativeLayoutReader, module.Handle, nameAndSigToken);
if (!interfaceMethodNameAndSignature.Equals(methodNameAndSignature))
{
continue;
}
// For each of the possible GVM slot targets for the current interface call, we will do the following:
//
// Step 1: Scan the types that currently provide implementations for the current GVM slot target, and look
// for ones that match the target object's type.
//
// Step 2: For each type that we find in step #1, get a list of all the interfaces that the current GVM target
// provides an implementation for
//
// Step 3: For each interface in the list in step #2, parse the signature of that interface, do the generic argument
// substitution (in case of a generic interface), and check if this interface signature is assignable from the
// calling interface signature (from the name and sig input). if there is an exact match based on
// interface type, then we've found the right slot. Otherwise, re-scan the entry again and see if some interface
// type is compatible with the initial slots interface by means of variance.
// This is done by calling the TypeLoaderEnvironment helper function.
//
// Example:
// public interface IFoo<out T, out U>
// {
// string M1<V>();
// }
// public class Foo1<T, U> : IFoo<T, U>, IFoo<Kvp<T, string>, U>
// {
// string IFoo<T, U>.M1<V>() { ... }
// public virtual string M1<V>() { ... }
// }
// public class Foo2<T, U> : Foo1<object, U>, IFoo<U, T>
// {
// string IFoo<U, T>.M1<V>() { ... }
// }
//
// GVM Table layout for IFoo<T, U>.M1<V>:
// {
// InterfaceTypeHandle = IFoo<T, U>
// InterfaceMethodNameAndSignature = { "M1", SigOf(string M1) }
// GVMTargetSlots[] =
// {
// {
// TargetMethodNameAndSignature = { "M1", SigOf(M1) }
// TargetTypeHandle = Foo1<T, U>
// ImplementingTypes[] = {
// ImplementingTypeHandle = Foo1<T, U>
// ImplementedInterfacesSignatures[] = { SigOf(IFoo<!0, !1>) }
// }
// },
//
// {
// TargetMethodNameAndSignature = { "M1", SigOf(M1) }
// TargetTypeHandle = Foo1<T, U>
// ImplementingTypes[] = {
// ImplementingTypeHandle = Foo1<T, U>
// ImplementedInterfacesSignatures[] = { SigOf(IFoo<Kvp<!0, string>, !1>) }
// }
// },
//
// {
// TargetMethodNameAndSignature = { "M1", SigOf(M1) }
// TargetTypeHandle = Foo2<T, U>
// ImplementingTypes = {
// ImplementingTypeHandle = Foo2<T, U>
// ImplementedInterfacesSignatures[] = { SigOf(IFoo<!1, !0>) }
// }
// },
// }
// }
//
uint currentOffset = entryParser.Offset;
// Non-variant dispatch of a variant generic interface generic virtual method.
if (FindMatchingInterfaceSlot(module, nativeLayoutReader, ref entryParser, ref extRefs, ref declaringType, ref methodNameAndSignature, openTargetTypeHandle, targetTypeInstantiation, false))
{
return(true);
}
entryParser.Offset = currentOffset;
// Variant dispatch of a variant generic interface generic virtual method.
if (FindMatchingInterfaceSlot(module, nativeLayoutReader, ref entryParser, ref extRefs, ref declaringType, ref methodNameAndSignature, openTargetTypeHandle, targetTypeInstantiation, true))
{
return(true);
}
}
}
return(false);
}