tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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testBug999790.js (1793B)

      1 function CanBeConstructed(f) {
      2    var caught = false;
      3    try {
      4        new f;
      5    } catch (e) {
      6        caught = true;
      7    }
      8    return !caught;
      9 }
     10 
     11 function IsConstructedFunction(f) {
     12    return f.hasOwnProperty('length')
     13        && f.hasOwnProperty('name')
     14        && f.hasOwnProperty('prototype')
     15        && f.prototype.hasOwnProperty('constructor')
     16        && f.prototype.constructor === f;
     17 }
     18 
     19 function IsntConstructedFunction(f) {
     20    return !f.hasOwnProperty('length')
     21        && !f.hasOwnProperty('name')
     22        && !f.hasOwnProperty('prototype')
     23 }
     24 
     25 var m = function() {
     26    "use asm"
     27    function g(){}
     28    return g;
     29 };
     30 assertEq(CanBeConstructed(m), true, "asm.js modules can't be constructed");
     31 
     32 var objM = new m;
     33 assertEq(IsConstructedFunction(objM), true);
     34 
     35 var g = m();
     36 assertEq(CanBeConstructed(g), true, "asm.js functions can't be constructed");
     37 // g is a ctor returning an primitive value, thus an empty object
     38 assertEq(Object.getOwnPropertyNames(new g).length, 0);
     39 
     40 var n = function() {
     41    "use asm"
     42    function g(){return 42.0}
     43    function h(){return 42}
     44    return {
     45        g: g,
     46        h: h
     47    };
     48 };
     49 assertEq(CanBeConstructed(n), true, "asm.js modules can't be constructed");
     50 
     51 var objN = new n;
     52 // objN is an object with attributes g and h
     53 assertEq(IsntConstructedFunction(objN), true);
     54 assertEq(objN.hasOwnProperty('g'), true);
     55 assertEq(objN.hasOwnProperty('h'), true);
     56 
     57 assertEq(IsConstructedFunction(objN.g), true);
     58 assertEq(IsConstructedFunction(objN.h), true);
     59 
     60 var h = n().h;
     61 assertEq(CanBeConstructed(h), true, "asm.js functions can't be constructed");
     62 // h is a ctor returning an primitive value, thus an empty object
     63 assertEq(Object.getOwnPropertyNames(new h).length, 0);
     64 
     65 assertEq(typeof(function() {"use asm"; return {}}.prototype) !== 'undefined', true);