diff options
Diffstat (limited to 'chromium/v8/src/objects/transitions.h')
| -rw-r--r-- | chromium/v8/src/objects/transitions.h | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/chromium/v8/src/objects/transitions.h b/chromium/v8/src/objects/transitions.h index 66e80f1704b..f86cdb41edf 100644 --- a/chromium/v8/src/objects/transitions.h +++ b/chromium/v8/src/objects/transitions.h @@ -124,20 +124,19 @@ class V8_EXPORT_PRIVATE TransitionsAccessor { } // ===== PROTOTYPE TRANSITIONS ===== - // When you set the prototype of an object using the __proto__ accessor, or if - // an unrelated new.target is passed to a constructor you need a new map for - // the object (the prototype is stored in the map). In order not to multiply - // maps unnecessarily we store these as transitions in the original map. That - // way we can transition to the same map if the same prototype is set, rather - // than creating a new map every time. The transitions are in the form of a - // map where the keys are prototype objects and the values are the maps they - // transition to. PutPrototypeTransition can trigger GC. + // When you set the prototype of an object using the __proto__ accessor you + // need a new map for the object (the prototype is stored in the map). In + // order not to multiply maps unnecessarily we store these as transitions in + // the original map. That way we can transition to the same map if the same + // prototype is set, rather than creating a new map every time. The + // transitions are in the form of a map where the keys are prototype objects + // and the values are the maps they transition to. + // PutPrototypeTransition can trigger GC. static void PutPrototypeTransition(Isolate* isolate, Handle<Map>, Handle<Object> prototype, Handle<Map> target_map); static Handle<Map> GetPrototypeTransition(Isolate* isolate, Handle<Map> map, - Handle<Object> prototype, - bool new_target_is_base); + Handle<Object> prototype); // During the first-time Map::Update and Map::TryUpdate, the migration target // map could be cached in the raw_transitions slot of the old map that is |