1. 10 Oct, 2019 1 commit
    • Joyee Cheung's avatar
      [class] fix undefined private name access in computed property keys · 7fa12e2a
      Joyee Cheung authored
      This patch implements https://github.com/tc39/proposal-class-fields/pull/269
      and makes sure we always throw TypeError when there is invalid private
      name access in computed property keys.
      
      Before this patch, private name variables of private fields and methods
      are initialized together with computed property keys in the order they
      are declared. Accessing undefined private names in the computed property
      keys thus fail silently.
      
      After this patch, we initialize the private name variables of private
      fields before we initialize the computed property keys, so that invalid
      access to private fields in the computed keys can be checked in the IC.
      We now also initialize the brand early, so that invalid access to private
      methods or accessors in the computed keys throw TypeError during brand
      checks - and since these accesses are guarded by brand checks, we can
      create the private methods and accessors after the class is
      defined, and merge the home object setting with the creation
      of the closures.
      
      Bug: v8:8330, v8:9611
      Change-Id: I01363f7befac6cf9dd28ec229b99a99102bcf012
      Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1846571
      Commit-Queue: Joyee Cheung <joyee@igalia.com>
      Reviewed-by: 's avatarMythri Alle <mythria@chromium.org>
      Reviewed-by: 's avatarToon Verwaest <verwaest@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#64225}
      7fa12e2a
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