• caitp's avatar
    [promises] port NewPromiseCapability to TF · 4f95a1eb
    caitp authored
    - Adds CodeAssembler::ConstructJS() to simplify calling JS functions as
    constructors, used by NewPromiseCapability()
    - Defines PromiseCapability as a special JSObject subclass, with a
    non-exensible Map, and read-only non-configurable DataDescriptors which
    point to its in-object fields. This allows its fields to be used by JS
    builtins until there is no longer any need.
    
    Currently, the performance benefit comes from
    https://codereview.chromium.org/2567033003/, but does not appear to
    regress performance in any significant way.
    
    BUG=v8:5343
    TBR=ulan@chromium.org
    
    Review-Url: https://codereview.chromium.org/2567333002
    Cr-Commit-Position: refs/heads/master@{#42014}
    4f95a1eb
objects.h 439 KB