757683 - Debugger.findScripts does not find all scripts

Status: RESOLVED DUPLICATE of bug 738480

(Core :: JavaScript Engine, defect)

Description

[Joshua Cranmer [:jcranmer]]

Simplified testcase (this needs two files):
--> test.js <--
Components.utils.import("resource:///modules/jsdebugger.jsm");
Components.utils.import("resource:///modules/Services.jsm");
Components.utils.import("file:///tmp/component.js");

addDebuggerToGlobal(this);
var Coverage = {};
(function(){
  let dump = Components.utils.getGlobalForObject(this).dump;
  let _debugger = null;
  let frames = [];
  this.captureFrames = function captureFrames(object) {
    _debugger = new Debugger(object);
    _debugger.onEnterFrame = onEnterFrame;
    _debugger.enabled = true;
  };
  function onEnterFrame(frame) {
    frame.onStep = function onStep() {
      dump("Do you see me?\n");
      frames.push(["line", this.script]);
    };
  }
  var Observer = {
    observe : function (subject, topic, data) {
      dump("Number of scripts: " + _debugger.findScripts().length + '\n');
      dump("Frames.length: " + frames.length + '\n');
    }
  };
  Services.obs.addObserver(Observer, "xpcom-will-shutdown", false);
}).apply(Coverage);
Coverage.captureFrames(Parser);
new Parser().aFunc();

--> component.js <-- (place in /tmp/component.js, or modify line 3 above)
function Parser() {}
Parser.prototype = {
  aFunc: function someFunction() { return this; }
};
var EXPORTED_SYMBOLS = ["Parser"];



Results:
jcranmer@xochiquetzal /tmp $ /src/build/trunk/mail/mozilla/dist/bin/run-mozilla.sh /src/build/trunk/mail/mozilla/dist/bin/xpcshell -f test.js 
Do you see me?
Do you see me?
Do you see me?
Number of scripts: 0
Frames.length: 3

(Bugzilla suggested bug 738480 as a possible duplicate, but I don't know enough to say if this is true or not).

Comment 1

[Jason Orendorff [:jorendorff]]

Reproduced. The behavior is really perplexing. findScripts just doesn't find anything no matter what I do.

Comment 2

[Jason Orendorff [:jorendorff]]

Oh, surely this is just a duplicate of bug 738480. That shouldn't be terribly hard to fix.

Comment 3

[Jason Orendorff [:jorendorff]]

Fix is up in bug 738480. Closing.