The Tor Browser: dom/workers/test/recursion

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /**

     2  * Any copyright is dedicated to the Public Domain.

     3  * http://creativecommons.org/publicdomain/zero/1.0/

     4  */

     6 // This function should never run on a too much recursion error.

     7 onerror = function(event) {

     8   postMessage(event.message);

     9 };

    11 // Pure JS recursion

    12 function recurse() {

    13   recurse();

    14 }

    16 // JS -> C++ -> JS -> C++ recursion

    17 function recurse2() {

    18   var xhr = new XMLHttpRequest();

    19   xhr.onreadystatechange = function() {

    20     xhr.open("GET", "nonexistent.file");

    21   }

    22   xhr.open("GET", "nonexistent.file");

    23 }

    25 var messageCount = 0;

    26 onmessage = function(event) {

    27   switch (++messageCount) {

    28     case 2:

    29       recurse2();

    31       // An exception thrown from an event handler like xhr.onreadystatechange

    32       // should not leave an exception pending in the code that generated the

    33       // event.

    34       postMessage("Done");

    35       return;

    37     case 1:

    38       recurse();

    39       throw "Exception should have prevented us from getting here!";

    41     default:

    42       throw "Weird number of messages: " + messageCount;

    43   }

    45   throw "Impossible to get here!";

    46 }

The Tor Browser / file revision