blob: 96f65a053ee6a1454242e911a9c42ebc9b7411ab [file] [log] [blame]
// Copyright 2019 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
bitfield struct PrototypeInfoFlags extends uint31 {
should_be_fast: bool: 1 bit;
extern class PrototypeInfo extends Struct {
// [module_namespace]: A backpointer to JSModuleNamespace from its
// PrototypeInfo (or undefined). This field is only used for JSModuleNamespace
// maps. TODO(jkummerow): Figure out if there's a way to store the namespace
// pointer elsewhere to save memory.
module_namespace: JSModuleNamespace|Undefined;
// [prototype_users]: WeakArrayList containing weak references to maps using
// this prototype, or Smi(0) if uninitialized.
prototype_users: WeakArrayList|Zero;
prototype_chain_enum_cache: FixedArray|Zero|Undefined;
// [registry_slot]: Slot in prototype's user registry where this user
// is stored. Returns UNREGISTERED if this prototype has not been registered.
registry_slot: Smi;
// [object_create_map]: A field caching the map for Object.create(prototype).
object_create_map: Weak<Map>|Undefined;
bit_field: SmiTagged<PrototypeInfoFlags>;