890918 - javascript from choices.truste.com frequently hangs the browser

Status: RESOLVED WORKSFORME

(Core :: DOM: Core & HTML, defect)

Description

[Nathan Froyd [:froydnj]]

Attachment: various JS hang stacks

I've been experiencing frequent lockups of the browser recently and have traced it to some bad javascript from choices.truste.com.  The frustrating thing is that it doesn't happen all the time: I can hit a page that uses choices.truste.com, lockup, restart, and go to the same page and everything is OK.

The slow script dialogue does not trigger for these pages.  The C++ stacks seem to be all over the place.  Example JS stack:

(gdb) call DumpJSStack()
0 anonymous() ["http://choices.truste.com/ca?pid=valueclick01&aid=valueclick01&cid=1&c=1869811604_8_863463&w=300&h=250&plc=tr":12]
    this = IFRAME
1 anonymous() ["http://choices.truste.com/ca?aid=valueclick01&pid=valueclick01&cid=1&w=300&h=250&plc=tr&c=1869811604_8_863463&js=2":90]
    this = [object Object]
2 anonymous() ["http://choices.truste.com/ca?aid=valueclick01&pid=valueclick01&cid=1&w=300&h=250&plc=tr&c=1869811604_8_863463&js=2":79]
    this = [object Object]
3 anonymous() ["http://choices.truste.com/ca?aid=valueclick01&pid=valueclick01&cid=1&w=300&h=250&plc=tr&c=1869811604_8_863463&js=2":74]
    this = [object Object]
4 anonymous() ["http://choices.truste.com/ca?aid=valueclick01&pid=valueclick01&cid=1&w=300&h=250&plc=tr&c=1869811604_8_863463&js=2":105]
    this = [object Object]
5 anonymous() ["http://choices.truste.com/ca?aid=valueclick01&pid=valueclick01&cid=1&w=300&h=250&plc=tr&c=1869811604_8_863463&js=2":198]
    this = [object Object]
6 onerror() ["http://www.weather.com/weather/today/Indianapolis+IN+46205":1]
    this = [object HTMLImageElement]

I'll upload a file containing several stacks from different lockups.  These started happening somewhere during the 24 cycle, maybe late 23.  It's possible it's a JS engine issue, but there's been a lot of stuff happening in DOM, too, so filing here first.

Comment 1

[Ioana (away)]

Nathan, can you please give a link to the site you reproduce this issue with? A reduced test case would also be good.

Boris, how can qa help here? Please try to add your request when adding qawanted in the future, so we know what to work on.

Comment 2

[Boris Zbarsky [:bzbarsky]]

QA could help here by helping pin down steps to reproduce.

Comment 3

[Nathan Froyd [:froydnj]]

(In reply to Ioana Budnar, QA [:ioana] from comment #1)
> Nathan, can you please give a link to the site you reproduce this issue
> with? A reduced test case would also be good.

http://www.weather.com/weather/today/Indianapolis+IN+46205 is one that at least sometimes locks up.  Like I said in comment 0, it's not consistent; sometimes the visit results in spinning, sometimes not.

I can't provide any other websites at this time; http://www.truste.com/consumer-privacy/trusted-directory/ unfortunately doesn't directly provide a complete list of all the sites that use truste.com JS code.

I wound up blocking choices.truste.com because this bug was so aggravating.

Comment 4

[Ioana (away)]

Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Firefox/24.0

I opened http://www.weather.com/weather/today/Indianapolis+IN+46205 and other links from it in several tabs and played around with the content on them for quite a while, but I didn't even get a small hang.

Nathan, could you please give more details on how you managed to reproduce this?
* What add-ons have you got installed?
* What else is open in your other tabs? And how many tabs have you got open?
* What is your hardware configuration?
* Have you changed any preferences that might affect this?
* What were your steps the times you reproduced this hang?

Comment 5

[Nathan Froyd [:froydnj]]

(In reply to Ioana Budnar, QA [:ioana] from comment #4)
> Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Firefox/24.0
> 
> I opened http://www.weather.com/weather/today/Indianapolis+IN+46205 and
> other links from it in several tabs and played around with the content on
> them for quite a while, but I didn't even get a small hang.
> 
> Nathan, could you please give more details on how you managed to reproduce
> this?
> * What add-ons have you got installed?
> * What else is open in your other tabs? And how many tabs have you got open?
> * What is your hardware configuration?
> * Have you changed any preferences that might affect this?
> * What were your steps the times you reproduced this hang?

I haven't been able to reproduce this with a several-days long session, though it was hanging quite frequently before.  I guess we can call this fixed.