Re: Crash in an audio driver - can someone help point me in the right direction?
Re: Crash in an audio driver - can someone help point me in the right direction?
- Subject: Re: Crash in an audio driver - can someone help point me in the right direction?
- From: Jeff Moore <email@hidden>
- Date: Mon, 08 Dec 2008 14:36:10 -0800
Crashes like this usually mean that somebody is interacting with a
CFRunLoop in a way that isn't thread safe. The usual cause is somebody
adding/removing a CFRunLoopSource to a run loop while that run loop is
processing stuff. The easiest way to do it is to call
CFRunLoopAddSource/CFRunLoopRemoveSource from a different thread than
the one that owns the given run loop.
The bundle ID "com.apple.mio.DAL.VDC" is a QuickTime thing I think. So
you might want to post this question to one of the QT developer lists
to see if it rings any bells there. BTW, it would probably be helpful
to see the entire crash report to see what sort of funny business
might be going on in other threads.
FWIW, you shouldn't hesitate to file a bug with us about this while
you pursue your investigation: http://bugreporter.apple.com
On Dec 8, 2008, at 1:22 PM, Neil Clayton wrote:
We're seeing this crop up a number of times in some crash logs we're
receiving:
Thread 11 Crashed:
0 com.apple.CoreFoundation 0x9158b0e9 CFRunLoopRunSpecific +
1817
1 com.apple.CoreFoundation 0x9158bd54 CFRunLoopRun + 84
2 com.apple.mio.DAL.VDC 0x17c1f395
MIO::PTA::CFMachPortThread::Start(MIO::PTA::CFMachPortThread*) + 109
3 libSystem.B.dylib 0x956826f5 _pthread_start + 321
4 libSystem.B.dylib 0x956825b2 thread_start + 34
I'm almost certain that I'm asking this in the wrong place, so
please forgive me if this is the case.
Should I just file a bug with Apple, or is there something else I
could have our user do to get more information? (it's a 10.5.5
system).
I'd like to file a bug with as much info as possible and I thought
it might be a smart idea to ask people with more knowledge that I
about this particular issue before I prematurely submit a worthless
bug report. If I should ask elsewhere please let me know and sorry
to bother you.
--
Jeff Moore
Core Audio
Apple
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