tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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revived-proxy.js (2108B)

      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 esid: sec-json.parse
      5 description: Behavior when revived value is a Proxy exotic object
      6 info: |
      7  [...]
      8  7. If IsCallable(reviver) is true, then
      9     a. Let root be ObjectCreate(%ObjectPrototype%).
     10     b. Let rootName be the empty String.
     11     c. Let status be CreateDataProperty(root, rootName, unfiltered).
     12     d. Assert: status is true.
     13     e. Return ? InternalizeJSONProperty(root, rootName).
     14 
     15  24.3.1.1 Runtime Semantics: InternalizeJSONProperty
     16 
     17  [...]
     18  2. If Type(val) is Object, then
     19     a. Let isArray be ? IsArray(val).
     20     b. If isArray is true, then
     21        [...]
     22     c. Else,
     23        [...]
     24 
     25  7.2.2 IsArray
     26 
     27  [...]
     28  3. If argument is a Proxy exotic object, then
     29     a. If the value of the [[ProxyHandler]] internal slot of argument is null,
     30        throw a TypeError exception.
     31     b. Let target be the value of the [[ProxyTarget]] internal slot of
     32        argument.
     33     c. Return ? IsArray(target).
     34 features: [Proxy]
     35 ---*/
     36 
     37 var objectProxy = new Proxy({
     38  length: 0,
     39  other: 0
     40 }, {});
     41 var arrayProxy = new Proxy([], {});
     42 var arrayProxyProxy = new Proxy(arrayProxy, {});
     43 var visitedOther, injectProxy;
     44 
     45 arrayProxy.other = 0;
     46 
     47 injectProxy = function(name, val) {
     48  if (name === 'other') {
     49    visitedOther = true;
     50  }
     51  this[1] = objectProxy;
     52  return val;
     53 };
     54 visitedOther = false;
     55 
     56 JSON.parse('[null, null]', injectProxy);
     57 
     58 assert.sameValue(visitedOther, true, 'proxy for ordinary object');
     59 
     60 injectProxy = function(name, val) {
     61  if (name === 'other') {
     62    visitedOther = true;
     63  }
     64  this[1] = arrayProxy;
     65  return val;
     66 };
     67 visitedOther = false;
     68 
     69 JSON.parse('[null, null]', injectProxy);
     70 
     71 assert.sameValue(visitedOther, false, 'proxy for array');
     72 
     73 injectProxy = function(name, val) {
     74  if (name === 'other') {
     75    visitedOther = true;
     76  }
     77  this[1] = arrayProxyProxy;
     78  return val;
     79 };
     80 visitedOther = false;
     81 
     82 JSON.parse('[null, null]', injectProxy);
     83 
     84 assert.sameValue(visitedOther, false, 'proxy for array proxy');
     85 
     86 reportCompare(0, 0);