Re: QEmu Script Error Checking

[Jack Mitchell <ml@communistcode.co.uk>]

On 12/10/2011 18:52, Zhang, Jessica wrote:
> Hi Jack,
>
> When and how did you trigger the error.  It looks more like a CDT issue than a Yocto issue, but can you tell us more what exactly you were doing with Yocto plug-in while this crash happened?  So you mean when you click on the debug, it caused qemu crashes? Or the qemu crashed 1st. then you got the eclipse error msg.
>
> Thanks,
> Jessica
>
> -----Original Message-----
> From: yocto-bounces@yoctoproject.org [mailto:yocto-bounces@yoctoproject.org] On Behalf Of Jack Mitchell
> Sent: Wednesday, October 12, 2011 3:12 AM
> To: yocto@yoctoproject.org
> Subject: Re: [yocto] QEmu Script Error Checking
>
> On 11/10/2011 19:02, Scott Garman wrote:
>> On 10/11/2011 08:41 AM, Jack Mitchell wrote:
>>> I have run into the following issue where the tap device is in use due
>>> to the QEmu machine unexpectedly crashing. The error I recieve is here:
>>>
>>> http://i.imgur.com/5t9U1.png (appologies for the screenshot but it
>>> wouldn't let me copy the text)
>>>
>>> Is there any leaway for more robust error checking or a way to forcibly
>>> destroy the tap node to allow a new one to be created?
>> Hi Jack,
>>
>> Since qemu is being run from a parent shell script (runqemu), if qemu
>> were to crash, I would think the parent shell script would continue on
>> and destroy the tap device normally. Might you be killing the runqemu
>> process instead of qemu itself?
>>
>> I'm not sure if there is a way we could reliably force a cleanup of
>> tap devices when runqemu starts, because we need to support the case
>> where multiple instances of qemu sessions are running simultaneously
>> (each with their own tap device). Off the top of my head I think this
>> would make the state of tap devices non-deterministic.
>>
>> Furthermore, we support a mode where an administrator can set up one
>> or more tap devices, allowing the runqemu user to not need sudo
>> privileges. So checking for the case where a tap device exists but no
>> qemu process is running wouldn't work.
>>
>> Scott
>>
> Ok, thank you for the information Scott. I think I found the issue today
> which is causing the QEmu script to terminate pre-maturely.
>
> I am using the eclipse-poky master branch as my eclipse plugin and it
> threw an error today when I tried to debug - which coincided with the
> QEmu and terminal window terminating. The errror I recieved was:
>
> !SESSION 2011-10-12 09:22:49.135
> -----------------------------------------------
> eclipse.buildId=I20110613-1736
> java.version=1.6.0_22
> java.vendor=Sun Microsystems Inc.
> BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_GB
> Framework arguments:  -product org.eclipse.sdk.ide
> Command-line arguments:  -product org.eclipse.sdk.ide -data
> /home/developer/jackdaw/../runtime-EclipseApplication -dev
> file:/home/developer/jackdaw/.metadata/.plugins/org.eclipse.pde.core/Eclipse
> Application/dev.properties -os linux -ws gtk -arch x86_64 -consoleLog
>
> !ENTRY org.eclipse.cdt.debug.mi.core 4 42 2011-10-12 09:24:47.192
> !MESSAGE Internal Error
> !STACK 0
> org.eclipse.cdt.debug.mi.core.cdi.MI2CDIException: Inferior terminated[]
>       at
> org.eclipse.cdt.debug.mi.core.cdi.SharedLibraryManager.getMIShareds(SharedLibraryManager.java:123)
>       at
> org.eclipse.cdt.debug.mi.core.cdi.SharedLibraryManager.updateState(SharedLibraryManager.java:188)
>       at
> org.eclipse.cdt.debug.mi.core.cdi.SharedLibraryManager.update(SharedLibraryManager.java:136)
>       at
> org.eclipse.cdt.debug.mi.core.cdi.EventManager.processSuspendedEvent(EventManager.java:326)
>       at
> org.eclipse.cdt.debug.mi.core.cdi.EventManager.update(EventManager.java:100)
>       at java.util.Observable.notifyObservers(Observable.java:159)
>       at
> org.eclipse.cdt.debug.mi.core.MISession.notifyObservers(MISession.java:791)
>       at org.eclipse.cdt.debug.mi.core.EventThread.run(EventThread.java:46)
>
> Which looks like a CDT bug or the interfacing with CDT. I could file a
> bug report if you think it is related to the poky-eclipse plugin?
>
> Cheers,
> Jack.
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> yocto@yoctoproject.org
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Jessica,

I have attached another error log which seems to be more verbose when I 
had this issue earlier today. Some of the errors seem to propogate from 
my code but there are also some CDT errors in there. The log is located 
here: http://pastebin.com/JHuE838B

Regards,
Jack