• Joyee Cheung's avatar
    [ic] fix handling of existing properties in Define{Keyed|Named}OwnIC · 4ee68d81
    Joyee Cheung authored
    - When the property being defined with DefineKeyedOwnIC or
      DefineNamedOwnIC already exists, we should use the slow path to
      check if the operation is allowed in case the property is
      non-configurable or Object.preventExtensions() has been called on
      the property.
    - Since KeyedStoreIC:Store() reuses StoreIC::Store() when the key is a
      name, we should use Runtime::DefineObjectOwnProperty() for
      DefineKeyedOwnIC too.
    - When dealing with public fields, Runtime::DefineObjectOwnProperty()
      should use JSReceiver::CreateDataProperty() instead of
      Object::SetProperty() for the specified semantics. This patch also
      adds JSReceiver::AddPrivateField() for it and StoreIC::Store to
      define private fields without triggering traps or checking
      extensibility.
    - To emit a more specific error message when redefining properties
      on non-extensible objects, Object::AddDataProperty() now also takes
      a EnforceDefineSemantics enum to distinguish between set and define.
    - Drive-by: fix JSReceiver::CheckIfCanDefine() which should check for
      extensibility even if the configurability check passes.
    
    Bug: chromium:1259950, v8:9888
    Change-Id: Ib1bc851ffd4b9c3a0e98cac96dafe743c08ee37e
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3517934Reviewed-by: 's avatarShu-yu Guo <syg@chromium.org>
    Reviewed-by: 's avatarToon Verwaest <verwaest@chromium.org>
    Commit-Queue: Joyee Cheung <joyee@igalia.com>
    Cr-Commit-Position: refs/heads/main@{#79603}
    4ee68d81
objects.h 37.9 KB