790344 - "Error in worker: Exception: TypeError: url.startsWith is not a function" in Firefox < 17

Status: RESOLVED FIXED

(Core :: Gecko Profiler, defect)

Description

[Florian Quèze [:florian]]

I've profiled a performance issue in Thunderbird, unfortunately the uploaded profile cannot be displayed, instead I see a JS error:

Error in worker: Exception: TypeError: url.startsWith is not a function (http://people.mozilla.com/~bgirard/cleopatra/js/parserWorker.js:263) 

Locally the profiler works fine.

I could upload profiles successfully with almost the same version of the profiler on a Firefox nightly. For Thunderbird I applied the fix from bug 769483 because otherwise most of the time is spent throwing JS errors (I'm creating thousands of DOM documents with DOMParser.parseFromString in the code that I'm profiling).

Comment 1

[:ehsan akhgari]

So, should we just rebuild the add-on extension with a new add-on SDK to get this fix deployed?

Comment 2

[Markus Stange [:mstange]]

Isn't this a cleopatra bug, not one of the extension?
I introduced the url.startsWith line yesterday in https://github.com/bgirard/cleopatra/commit/9221eb539e7f7cc1605f7bd0962d4a1c4c80ad54
I think we only need to make parseResourceName null-safe and redeploy http://people.mozilla.com/~bgirard/cleopatra/ or am I missing anything?

Comment 3

[Markus Stange [:mstange]]

Oh, I think I know what I'm missing. Florian, which Firefox version did you use to view your profile? Because it works in my Firefox (Nightly). So I guess String.prototype.startsWith was only added recently?

Comment 4

[Florian Quèze [:florian]]

(In reply to Markus Stange from comment #3)
> Oh, I think I know what I'm missing. Florian, which Firefox version did you
> use to view your profile? Because it works in my Firefox (Nightly). So I
> guess String.prototype.startsWith was only added recently?

It works in my nightly (great!). I was using 15.0.

Comment 5

[Florian Quèze [:florian]]

(In reply to Ehsan Akhgari [:ehsan] from comment #1)
> So, should we just rebuild the add-on extension with a new add-on SDK to get
> this fix deployed?

I think this would be a good idea to avoid the issue I mentioned in bug 720261 comment 3, but it turns out this isn't directly related to the error I was reporting here, as using a Nightly to view the profile works.

Comment 6

[Markus Stange [:mstange]]

Opened a pull request: https://github.com/bgirard/cleopatra/pull/12

Comment 7

[Markus Stange [:mstange]]

And it's deployed.