I'm on Nightly with e10s off. Trying to play Candy Crush Saga (from Facebook), the app won't load, it gets stuck at 78% (when it probably do something different, like load something from elsewhere, I don't know).

I discovered that some plugin streams are being terminated prematurely when async init is on. The crux of the problem is that nsNPAPIPluginStreamListener::OnStartBinding is not always called when you would think it would be called by Necko; sometimes the underlying request has already completed. I've got a patch written that works for Candy Crush Saga but obviously I want to test it out a bit with other content.

Comment on attachment 8591871 [details] [diff] [review] Prevent premature stream termination Review of attachment 8591871 [details] [diff] [review]: ----------------------------------------------------------------- ::: dom/plugins/ipc/PluginAsyncSurrogate.cpp @@ +171,5 @@ > aFuncs->setvalue = &NPP_SetValue; > aFuncs->newstream = &NPP_NewStream; > aFuncs->setwindow = &NPP_SetWindow; > aFuncs->writeready = &NPP_WriteReady; > + aFuncs->write = &NPP_Write; This is set about 5 lines below to |&PluginModuleParent::NPP_Write| so this line doesn't appear to have any affect. Is that right?

Duh, that's silly of me. Fixed that. I also replaced the two bools that I added to the listener with an enum.

Comment on attachment 8592314 [details] [diff] [review] Prevent premature stream termination (r2) Approval Request Comment [Feature/regressing bug #]: async plugin init [User impact if declined]: Plugins don't start properly, particularly Candy Crush Saga or other big games. This patch should also improve stability, so there would be unfixed stability problems. [Describe test coverage new/current, TreeHerder]: Tested with local and nightly builds with asyncInit enabled. [Risks and why]: Low. Simple patch that makes the browser more conservative with respect to terminating plugin streams. [String/UUID change made/needed]: None

Florin, can your team test this fix on nightly before we uplift it? Aaron, what other games might be useful to test?

Tracking for 39+

(In reply to Liz Henry (:lizzard) from comment #8) > Aaron, what other games might be useful to test? Any game that is takes a while to start because it has a bunch of assets that need to be downloaded. FarmVille and other popular Facebook games are also good candidates.

Verified as fixed using the following environment: FF 40 Build Id: 20150416030209 OS: Win 7 x64

Comment on attachment 8592314 [details] [diff] [review] Prevent premature stream termination (r2) Approving for uplift to aurora.

Backed out for test_pluginstream_err.html crashes. https://hg.mozilla.org/releases/mozilla-aurora/rev/a1d5331b1823 https://treeherder.mozilla.org/logviewer.html#?job_id=772938&repo=mozilla-aurora

Ha! Looks like we hit bug 1155503.

u-a-f according to ASAN: https://treeherder.mozilla.org/logviewer.html#?job_id=773028&repo=mozilla-aurora

Relanded along with bug 1155503 uplift. https://hg.mozilla.org/releases/mozilla-aurora/rev/6b316eabf6e1

I verified this fix using: FF 39.0b2 Build Id: 20150601171003 OS: Win 7 x64, Mac Os X 10.9.5 and I've encountered an issue, candy crush saga is not completely loading when using a new profile, I've logged bug 1170486 for this issues.