tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
Log | Files | Refs | README | LICENSE

detached-buffer.js (844B)

      1 // Copyright (C) 2016 the V8 project authors. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 
      4 /*---
      5 esid: sec-dataview-buffer-byteoffset-bytelength
      6 description: >
      7  Throws a TypeError if buffer is detached
      8 info: |
      9  24.2.2.1 DataView (buffer, byteOffset, byteLength )
     10 
     11  ...
     12  4. Let numberOffset be ? ToNumber(byteOffset).
     13  ...
     14  7. If IsDetachedBuffer(buffer) is true, throw a TypeError exception.
     15  ...
     16 includes: [detachArrayBuffer.js]
     17 ---*/
     18 
     19 var toNumberOffset = 0;
     20 var obj = {
     21  valueOf: function() {
     22    toNumberOffset += 1;
     23    return 0;
     24  }
     25 };
     26 
     27 var ab = new ArrayBuffer(42);
     28 $DETACHBUFFER(ab);
     29 
     30 assert.throws(TypeError, function() {
     31  new DataView(ab, obj);
     32 }, "throws if buffer is detached");
     33 
     34 assert.sameValue(toNumberOffset, 1, "ToNumber(byteOffset) runs before");
     35 
     36 reportCompare(0, 0);