tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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proto-from-ctor-realm-sab.js (1275B)

      1 // |reftest| skip-if(!this.hasOwnProperty('SharedArrayBuffer')) -- SharedArrayBuffer is not enabled unconditionally
      2 // Copyright (C) 2016 the V8 project authors. All rights reserved.
      3 // Copyright (C) 2017 Mozilla Corporation. All rights reserved.
      4 // This code is governed by the BSD license found in the LICENSE file.
      5 /*---
      6 esid: sec-dataview-buffer-byteoffset-bytelength
      7 description: Default [[Prototype]] value derived from realm of the newTarget
      8 info: |
      9    [...]
     10    12. Let O be ? OrdinaryCreateFromConstructor(NewTarget,
     11        "%DataViewPrototype%", « [[DataView]], [[ViewedArrayBuffer]],
     12        [[ByteLength]], [[ByteOffset]] »).
     13    [...]
     14 
     15    9.1.14 GetPrototypeFromConstructor
     16 
     17    [...]
     18    3. Let proto be ? Get(constructor, "prototype").
     19    4. If Type(proto) is not Object, then
     20       a. Let realm be ? GetFunctionRealm(constructor).
     21       b. Let proto be realm's intrinsic object named intrinsicDefaultProto.
     22    [...]
     23 features: [cross-realm, Reflect, SharedArrayBuffer]
     24 ---*/
     25 
     26 var other = $262.createRealm().global;
     27 var C = new other.Function();
     28 C.prototype = null;
     29 var buffer = new SharedArrayBuffer(0);
     30 
     31 var o = Reflect.construct(DataView, [buffer, 0], C);
     32 
     33 assert.sameValue(Object.getPrototypeOf(o), other.DataView.prototype);
     34 
     35 reportCompare(0, 0);