848381 - Dozens of Flash processes spawned

Status: RESOLVED INCOMPLETE

(Core Graveyard :: Plug-ins, defect)

Description

[Vladan Djeric (:vladan)]

My Firefox was being very sluggish and I noticed that there were about 20 FlashPlayerPlugin_11_6_602_171.exe processes running and a single plugin-container.exe process. Firefox became responsive again after I terminated the Flash broker/sandboxed processes. However, as soon as I opened another YouTube page, dozens of Flash processes popped up in my Task Manager. Even restarting Firefox could not prevent this behavior from re-occuring.

I've seen this behavior on multiple occasions, but I can't reproduce this at will. This might be a Flash bug. 

- Win7 machine, Flash version 11.6.602.171
- about a dozen extensions installed, mostly privacy & anti-ad
- My dom.ipc.plugins.hangUITimeoutSecs = 1

Comment 1

[Vladan Djeric (:vladan)]

I can reproduce this in my current Firefox session. Benjamin, what info do you need me to grab?

Comment 2

[Georg Fritzsche [:gfritzsche]]

The Flash child processes get launched from NP_Initialize(). 
Could you check if this is hit repeatedly:
http://dxr.mozilla.org/mozilla-central/dom/plugins/ipc/PluginModuleChild.cpp#l1864

If yes, what is the browser-side call-stack:
http://dxr.mozilla.org/mozilla-central/dom/plugins/ipc/PluginModuleParent.cpp#l1197

Comment 3

[Benjamin Smedberg]

As far as I understand the bug report, the problem isn't that there are more plugin-containers; it's that there are lots of FlashPlayerPlugin processes. Although it would be good to make sure that we *aren't* launching and then immediately quitting lots of plugin-containers.

Comment 4

[Vladan Djeric (:vladan)]

I can't reproduce this anymore (with the same session), but I'll keep trying

Comment 5

[Benjamin Smedberg]

Resolving old bugs which are likely not relevant any more, since NPAPI plugins are deprecated.