Re: DeviceIsDead
Re: DeviceIsDead
- Subject: Re: DeviceIsDead
- From: Lubor Prikryl <email@hidden>
- Date: Sun, 1 May 2005 21:20:51 +0200
Hello Jeff,
Thanks for your reply.
There is nothing special in other threads, CFRunLoopRun.
But I have advanced three calls deeper in the stack:
Thread 3 Crashed:
0 <<00000000>> 0x00000000 0 + 0
1 com.apple.audio.CoreAudio 0x90745970
HPDeviceSettings_SaveDeviceSettings(HPDevice const&, CACFDictionary&,
bool, HPDeviceSettings::ControlInfo const*, unsigned long) + 0x2c
2 com.apple.audio.CoreAudio 0x90745898
HPDeviceSettings::SaveToDictionary(HPDevice const&,
HPDeviceSettings::ControlInfo const*, unsigned long) + 0x70
3 com.apple.audio.CoreAudio 0x907456dc
HPDeviceSettings::SaveToPrefs(HPDevice const&,
HPDeviceSettings::ControlInfo const*, unsigned long) + 0x20
4 com.apple.audio.CoreAudio 0x90745530
IOAPlugIn::DeviceIsDead(IOADevice*) + 0x134
5 com.apple.audio.CoreAudio 0x9075aa04
IOADevice::IOServiceInterestCallback(void*, unsigned int, unsigned int,
void*) + 0x90
6 com.apple.framework.IOKit 0x905a2570
IODispatchCalloutFromCFMessage + 0x1a0
7 com.apple.CoreFoundation 0x901dd280 __CFMachPortPerform + 0xe0
8 com.apple.CoreFoundation 0x901d9a04 __CFRunLoopDoSource1 +
0xc8
9 com.apple.CoreFoundation 0x901c18d0 __CFRunLoopRun + 0x540
10 com.apple.CoreFoundation 0x901c5e6c CFRunLoopRunSpecific +
0x148
11 com.apple.audio.CoreAudio 0x90732f80
HALRunLoop::OwnThread(void*) + 0x104
12 com.apple.audio.CoreAudio 0x907391e0
CAPThread::Entry(CAPThread*) + 0x30
13 libSystem.B.dylib 0x90024910 _pthread_body + 0x28
Please, what is this saving of device settings?
Lubor
On 29.4.2005, at 22:57, Jeff Moore wrote:
That back trace indicates that the HAL is crashing when it is
receiving the notification from IOKit that the device has gone away.
Generally speaking, this sort of crash is an indication of some memory
corruption somewhere, but it's hard to say for sure.
Do you have any more context you can provide? What's going on in the
other threads? Have you tried running your app with GuardMalloc or
MallocDebug?
On Apr 29, 2005, at 1:23 PM, Lubor Prikryl wrote:
Hello,
I am solving an issue when my app is crashing after unplugging FW and
USB devices.
What I do obtaining a notification:
Remove all listening to device and stream notifications for this
device
Stop the device
Remove callback
After that, the application crashes as it seems that the CA thread
attempts to continue with the device
#0 0x907455dc in IOAPlugIn::DeviceIsDead(IOADevice*)
#1 0x9075aa04 in IOADevice::IOServiceInterestCallback(void*,
unsigned, unsigned, void*)
#2 0x905a2570 in IODispatchCalloutFromCFMessage
#3 0x901dd280 in __CFMachPortPerform
#4 0x901d9a04 in __CFRunLoopDoSource1
#5 0x901c18d0 in __CFRunLoopRun
#6 0x901c5e6c in CFRunLoopRunSpecific
#7 0x90732f80 in HALRunLoop::OwnThread(void*)
#8 0x907391e0 in CAPThread::Entry(CAPThread*)
#9 0x90024910 in _pthread_body
What else should I do after the device is disconnected to avoid it?
--
Jeff Moore
Core Audio
Apple
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