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Last Comment Bug 716004 - Traverse nsXBLDocumentInfo less often
: Traverse nsXBLDocumentInfo less often
Product: Core
Classification: Components
Component: XBL (show other bugs)
: 12 Branch
: All All
: -- normal (vote)
: ---
Assigned To: Olli Pettay [:smaug]
: Andrew Overholt [:overholt]
Depends on:
Blocks: 716598
  Show dependency treegraph
Reported: 2012-01-06 12:13 PST by Olli Pettay [:smaug]
Modified: 2012-01-13 05:29 PST (History)
3 users (show)
See Also:
Crash Signature:
QA Whiteboard:
Iteration: ---
Points: ---
Has Regression Range: ---
Has STR: ---

patch (1.77 KB, patch)
2012-01-06 12:13 PST, Olli Pettay [:smaug]
continuation: review+
jst: review+
Details | Diff | Splinter Review

Description Olli Pettay [:smaug] 2012-01-06 12:13:17 PST
Created attachment 586508 [details] [diff] [review]

Keep similar behavior to rest of DOM to traverse script objects,
but don't traverse anything else.
If mDocument is in generation, so is then nsXBLDocumentInfo
(owned by xul cache).
Comment 1 Andrew McCreight [:mccr8] 2012-01-06 12:24:43 PST
Is there some specific reason you are concerned about moving around script traversal or are you just being safe?

The code looks fine to me, but I don't know anything about nsXBLDocumentInfo, so you should get somebody else to confirm that mDocument always holds the nsXBLDocumentInfo alive.
Comment 2 Andrew McCreight [:mccr8] 2012-01-06 15:01:17 PST
I talked to jst about this a little, and he said that these objects aren't guaranteed to be in the XUL cache.  Or rather, they are in the browser as is, but somebody could configure non-browser usage (or something like that?) so they wouldn't be.
Comment 3 Olli Pettay [:smaug] 2012-01-07 05:36:02 PST
The objects are in XUL cache if they are in CC generation. This relies on the behavior
Comment 4 Andrew McCreight [:mccr8] 2012-01-07 08:11:33 PST
Ah, yes, that makes sense.
Comment 5 Johnny Stenback (:jst, 2012-01-07 10:50:13 PST
Is that true even for non-chrome XBL documents? I.e. if a user explicitly enables remote XBL for a given site?
Comment 6 Olli Pettay [:smaug] 2012-01-07 11:00:20 PST
If those aren't in XUL cache, document's aren't marked to be in CC generation.
Comment 7 Olli Pettay [:smaug] 2012-01-07 11:01:15 PST
...see the patch for bug 713865.
Comment 8 Johnny Stenback (:jst, 2012-01-07 11:04:22 PST
Good point.
Comment 9 Olli Pettay [:smaug] 2012-01-13 05:29:41 PST

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