public unsafe static IntPtr TryGetStaticClassConstructionContext(RuntimeTypeHandle typeHandle)
{
if (RuntimeAugments.HasCctor(typeHandle))
{
if (RuntimeAugments.IsDynamicType(typeHandle))
{
// For dynamic types, its always possible to get the non-gc static data section directly.
byte *ptr = (byte *)*(IntPtr *)RuntimeAugments.GetNonGcStaticFieldData(typeHandle);
// what we have now is the base address of the non-gc statics of the type
// what we need is the cctor context, which is just before that
ptr = ptr - sizeof(System.Runtime.CompilerServices.StaticClassConstructionContext);
return((IntPtr)ptr);
}
else
{
// Non-dynamic types do not provide a way to directly get at the non-gc static region.
// Use the CctorContextMap instead.
var moduleHandle = RuntimeAugments.GetModuleFromTypeHandle(typeHandle);
Debug.Assert(moduleHandle != IntPtr.Zero);
NativeReader typeMapReader;
if (TryGetNativeReaderForBlob(moduleHandle, ReflectionMapBlob.CCtorContextMap, out typeMapReader))
{
NativeParser typeMapParser = new NativeParser(typeMapReader, 0);
NativeHashtable typeHashtable = new NativeHashtable(typeMapParser);
ExternalReferencesTable externalReferences = default(ExternalReferencesTable);
externalReferences.InitializeCommonFixupsTable(moduleHandle);
var lookup = typeHashtable.Lookup(typeHandle.GetHashCode());
NativeParser entryParser;
while (!(entryParser = lookup.GetNext()).IsNull)
{
RuntimeTypeHandle foundType = externalReferences.GetRuntimeTypeHandleFromIndex(entryParser.GetUnsigned());
if (foundType.Equals(typeHandle))
{
byte *pNonGcStaticBase = (byte *)externalReferences.GetIntPtrFromIndex(entryParser.GetUnsigned());
// cctor context is located before the non-GC static base
return((IntPtr)(pNonGcStaticBase - sizeof(System.Runtime.CompilerServices.StaticClassConstructionContext)));
}
}
}
}
}
return(IntPtr.Zero);
}
