The Tor Browser: toolkit/modules/debug.js@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* vim:set ts=2 sw=2 sts=2 ci et: */

     2 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     4 /* This Source Code Form is subject to the terms of the Mozilla Public

     5  * License, v. 2.0. If a copy of the MPL was not distributed with this

     6  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     8 // This file contains functions that are useful for debugging purposes from

     9 // within JavaScript code.

    11 this.EXPORTED_SYMBOLS = ["NS_ASSERT"];

    13 var gTraceOnAssert = true;

    15 /**

    16  * This function provides a simple assertion function for JavaScript.

    17  * If the condition is true, this function will do nothing.  If the

    18  * condition is false, then the message will be printed to the console

    19  * and an alert will appear showing a stack trace, so that the (alpha

    20  * or nightly) user can file a bug containing it.  For future enhancements,

    21  * see bugs 330077 and 330078.

    22  *

    23  * To suppress the dialogs, you can run with the environment variable

    24  * XUL_ASSERT_PROMPT set to 0 (if unset, this defaults to 1).

    25  *

    26  * @param condition represents the condition that we're asserting to be

    27  *                  true when we call this function--should be

    28  *                  something that can be evaluated as a boolean.

    29  * @param message   a string to be displayed upon failure of the assertion

    30  */

    32 this.NS_ASSERT = function NS_ASSERT(condition, message) {

    33   if (condition)

    34     return;

    36   var releaseBuild = true;

    37   var defB = Components.classes["@mozilla.org/preferences-service;1"]

    38                        .getService(Components.interfaces.nsIPrefService)

    39                        .getDefaultBranch(null);

    40   try {

    41     switch (defB.getCharPref("app.update.channel")) {

    42       case "nightly":

    43       case "aurora":

    44       case "alpha":

    45       case "beta":

    46       case "default":

    47         releaseBuild = false;

    48     }

    49   } catch(ex) {}

    51   var caller = arguments.callee.caller;

    52   var assertionText = "ASSERT: " + message + "\n";

    54   // Report the error to the console

    55   Components.utils.reportError(assertionText);

    57   if (releaseBuild) {

    58     return;

    59   }

    61   // dump the stack to stdout too in non-release builds

    62   var stackText = "";

    63   if (gTraceOnAssert) {

    64     stackText = "Stack Trace: \n";

    65     var count = 0;

    66     while (caller) {

    67       stackText += count++ + ":" + caller.name + "(";

    68       for (var i = 0; i < caller.arguments.length; ++i) {

    69         var arg = caller.arguments[i];

    70         stackText += arg;

    71         if (i < caller.arguments.length - 1)

    72           stackText += ",";

    73       }

    74       stackText += ")\n";

    75       caller = caller.arguments.callee.caller;

    76     }

    77   }

    79   dump(assertionText + stackText);

    80 }

The Tor Browser / file revision