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Re: Core Animation Deadlock

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Re: Core Animation Deadlock

Subject: Re: Core Animation Deadlock
From: John Stiles <email@hidden>
Date: Thu, 24 Apr 2008 19:30:20 -0700

You could also show any other thread stuck trying to lock a mutex? I assume there's another thread holding this lock or stuck trying to lock something else.

Colin Cornaby wrote:

Hi,
I'm currently trying to track down a deadlock. After adding a series of layers, CoreAnimation deadlocks here on the main thread:

#0 0x958af4ee in semaphore_wait_signal_trap #1 0x958b6fc5 in pthread_mutex_lock #2 0x909f8d72 in CAContextCommitTransaction #3 0x909f89bd in CATransactionCommit #4 0x90375351 in -[NSView(NSLayerKitGlue) _drawRectAsLayerTree:] #5 0x9010ab1e in -[NSView _drawRect:clip:] #6 0x901091ed in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:]

#7 0x90109c23 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:]

#8 0x90109c23 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:]

#9 0x90109c23 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:]

#10 0x90109c23 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:]

#11 0x90109c23 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:]

#12 0x9010870b in -[NSThemeFrame _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:]

#13 0x9010522f in -[NSView _displayRectIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:] #14 0x90045c87 in -[NSView displayIfNeeded] #15 0x90045835 in -[NSWindow displayIfNeeded] #16 0x90045658 in _handleWindowNeedsDisplay #17 0x910f89a2 in __CFRunLoopDoObservers #18 0x910f9d05 in CFRunLoopRunSpecific #19 0x910facf8 in CFRunLoopRunInMode #20 0x9159fda4 in RunCurrentEventLoopInMode #21 0x9159faf6 in ReceiveNextEventCommon #22 0x9159fa31 in BlockUntilNextEventMatchingListInMode #23 0x900434fd in _DPSNextEvent #24 0x90042db0 in -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] #25 0x9003bdeb in -[NSApplication run] #26 0x90009028 in NSApplicationMain #27 0x00007401 in main at main.m:13

There are a bunch of other threads, too many to reasonably list in a message to the list.

While I continue debugging and trying to track down what I'm doing that starts the deadlock, does anyone have any general ideas on where it would be best to look?
Thanks,
Colin
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