[haiku-bugs] [Haiku] #6738: app_server hangs?

#6738: app_server hangs?
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   Reporter:  kirilla             |       Owner:  axeld
       Type:  bug                 |      Status:  new
   Priority:  normal              |   Milestone:  R1
  Component:  Servers/app_server  |     Version:  R1/Development
   Keywords:                      |  Blocked By:
Has a Patch:  0                   |    Platform:  All
   Blocking:                      |
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 App_server hangs, from what I can tell, occasionally, in Haiku r37150.

 Mouse clicks stop doing anything meaningful. I can't raise or lower
 windows, can't shift focus to some other window or view. I -can- move the
 mouse around, on-screen, but after a while the pointer hangs too.

 Volountarily entering KDL to have a look-see, reveals that on my quad
 core, three idle threads are running, and there's a w:offscreen something
 thread running, which belongs to app_server. A backtrace hints at Painter,
 agg and a chain of 10-20 calls on a recursive bezier function.

 A locking issue in Painter, maybe? I think WebPositive is the app which
 triggers this. Will try to look out for a website that triggers it.

 Sadly I have no means to provide serial output or snapshots right now.

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Ticket URL: <http://dev.haiku-os.org/ticket/6738>
Haiku <http://dev.haiku-os.org>
Haiku - the operating system.

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