protected override void OutputVirtualSlots(NodeFactory factory, ref ObjectDataBuilder objData, TypeDesc implType, TypeDesc declType)
{
declType = declType.GetClosestDefType();
var baseType = declType.BaseType;
if (baseType != null)
OutputVirtualSlots(factory, ref objData, implType, baseType);
// The generic dictionary pointer occupies the first slot of each type vtable slice
if (declType.HasGenericDictionarySlot())
{
objData.EmitPointerReloc(factory.TypeGenericDictionary(declType));
}
// Actual vtable slots follow
IReadOnlyList<MethodDesc> virtualSlots = factory.VTable(declType).Slots;
for (int i = 0; i < virtualSlots.Count; i++)
{
MethodDesc declMethod = virtualSlots[i];
MethodDesc implMethod = implType.GetClosestDefType().FindVirtualFunctionTargetMethodOnObjectType(declMethod);
if (declMethod.HasInstantiation)
{
// Generic virtual methods will "compile", but will fail to link. Check for it here.
throw new NotImplementedException("VTable for " + _type + " has generic virtual methods.");
}
if (!implMethod.IsAbstract)
{
MethodDesc canonImplMethod = implMethod.GetCanonMethodTarget(CanonicalFormKind.Specific);
objData.EmitPointerReloc(factory.MethodEntrypoint(canonImplMethod, implMethod.OwningType.IsValueType));
}
else
{
objData.EmitZeroPointer();
}
}
}
/// <summary>
/// Gets the vtable slot that holds the generic dictionary of this type.
/// </summary>
public static int GetGenericDictionarySlot(NodeFactory factory, TypeDesc type)
{
Debug.Assert(type.HasGenericDictionarySlot());
return GetNumberOfBaseSlots(factory, type);
}