398086 - Attempting to view documentation on www.cisco.com results in browser hang

Status: RESOLVED WORKSFORME

(Core :: JavaScript Engine, defect, P5)

Description

[Bill Gianopoulos [:WG9s]]

Attempting to view most documentation files on the www.cisco.com website results in the browser hanging for 10 full minutes, followed by the a script is not responding pop-up.

This regressed somewhere between 1.9a7 and a.9a8.

I will attempt to narrow this window.

Comment 1

[Bill Gianopoulos [:WG9s]]

This seems to be a regression from bug 392973 (verified by backout).

It would appear there is someting wrong with the JavaScript that is looping here, but letting it go for 10 minutes before the pop-up occurs seems a bit much.

Comment 2

[Brendan Eich [:brendan]]

Contact the site and point out the runaway recursion, if that's what is going on?

/be

Comment 3

[Bill Gianopoulos [:WG9s]]

I was planning on debugging the script further to see what is going on, but I kind of thought the script not responding pop-up should have come up way before 10 minutes.

Comment 4

[Igor Bukanov]

I think it is necessary to call the branch callback on inline calls in addition to to normal branches to allow stopping scripts before they consume 32M of the script stack space. But then better instruction counting from bug 364776 becomes important.

Comment 5

[Brian Crowder]

Not convinced this one of 364776 should block, but Igor (or Brendan?) should make the call.  I'm wildly guessing at P5 for both, if they do?

Comment 6

[Brian Crowder]

We need to investigate this more and figure out the branch-callback problem.  Morph this bug or WFM it and open another?

Comment 7

[Bill Gianopoulos [:WG9s]]

In any event, evidently Cisco figured out their issue and I can no longer duplicate this issue on their website.

Comment 8

[Brian Crowder]

Calling this one WFM, though I wholeheartedly approve of improving the branch-callback situation, as per bug 364776.