[Vm-dev] CogVM crash when printing related to #cannotInterpret:

[Mariano Martinez Peck]

On Mon, Oct 3, 2011 at 10:13 PM, Eliot Miranda <eliot.miranda at gmail.com>wrote:

> Hi Mariano,
>
>     can you create an image that exhibits the crash from start-up?  If so,
> please email it to me and I'll fix this asap.
>
>
Eliot, by start-up you mean start-up list or I can just prepare the image
with a test you can run?
Thanks a lot!



>
> On Mon, Oct 3, 2011 at 2:35 AM, Mariano Martinez Peck <
> marianopeck at gmail.com> wrote:
>
>>
>> Hi Eliot. I am testing your very last VM r2496, CogMT in Mac OS 10.6.8. I
>> am using the trick of #cannotInterpret: and I discover a problem with it.
>> Basically, it is when doing something like this:
>>
>> MyProxy >> cannotInterpret: aMessage
>>
>> Error signal: 'ups...'.
>>
>> In this case, the debugger comes in but after one or 2 times I press in
>> the debugger line of #cannotInterpret: (to debug it), it crashes. As far as
>> I could see with gdb, the problem is in MethodContext >> #printDetails:
>> If I comment the contents of such method, I have no crash at all. I think
>> that in this scenario where I throw an arror inside #cannotInterpret can
>> reach a situation where you don't have temps or values or receiver or
>> something and that's why it crash.
>> Furthermore, previous VM version, do NOT have this problem.
>>
>> I will try to dig a little more, but if you give me a hint, I appreciate
>> it.
>>
>> Here is the bt and the stack:
>>
>> Program received signal EXC_BAD_ACCESS, Could not access memory.
>> Reason: KERN_PROTECTION_FAILURE at address: 0x00000026
>> 0x000d8356 in methodHasCogMethod ()
>> (gdb) bt
>> #0  0x000d8356 in methodHasCogMethod ()
>> #1  0x000c7899 in cogPICSelectornumArgsCase0MethodCase1MethodtagisMNUCase
>> ()
>> #2  0x000d6eea in ceSICMiss ()
>> #3  0x13ffc35c in ?? ()
>> #4  0x00107a05 in threadSchedulingLoop ()
>> #5  0x00108c38 in initStackPagesAndInterpret ()
>> #6  0x0005d964 in EventLoopEventHandler ()
>> #7  0x98c66c2f in DispatchEventToHandlers ()
>> #8  0x98c65ef6 in SendEventToEventTargetInternal ()
>> #9  0x98c65d55 in SendEventToEventTargetWithOptions ()
>> #10 0x98c9aa24 in ToolboxEventDispatcherHandler ()
>> #11 0x98c67080 in DispatchEventToHandlers ()
>> #12 0x98c65ef6 in SendEventToEventTargetInternal ()
>> #13 0x98c887f3 in SendEventToEventTarget ()
>> #14 0x98e11c17 in ToolboxEventDispatcher ()
>> #15 0x98e11d4f in RunApplicationEventLoop ()
>> #16 0x0005d18a in RunApplicationEventLoopWithSqueak ()
>> #17 0x0006ebf7 in main ()
>>
>>
>>
>> (gdb) call (int) printAllStacks()
>> Process 0x171793f8 priority 40
>> 0xbff69d64 M [] in MethodContext>printDetails: 387422092: a(n)
>> MethodContext
>> 0xbff69d80 M BlockClosure>on:do: 388720820: a(n) BlockClosure
>> 0xbff69da0 M BlockClosure>ifError: 388720820: a(n) BlockClosure
>> 0xbff69dc8 M MethodContext>printDetails: 387422092: a(n) MethodContext
>> 0xbff69df0 M MethodContext(ContextPart)>errorReportOn: 387418688: a(n)
>> MethodContext
>> 0xbff69e1c I [] in SmalltalkImage>logError:inContext: 340435416: a(n)
>> SmalltalkImage
>> 0xbff69e48 I [] in SmalltalkImage>logDuring: 340435416: a(n)
>> SmalltalkImage
>> 0xbff69e68 M BlockClosure>ensure: 388309644: a(n) BlockClosure
>> 0xbff69e90 I SmalltalkImage>logDuring: 340435416: a(n) SmalltalkImage
>> 0xbff69eb4 I SmalltalkImage>logError:inContext: 340435416: a(n)
>> SmalltalkImage
>> 0xbff69ef0 M [] in
>> MorphicUIManager>openDebuggerOn:context:label:contents:fullView: 338485116:
>> a(n) MorphicUIManager
>> 0xbff69f0c M BlockClosure>on:do: 387421948: a(n) BlockClosure
>> 0xbff69f44 M [] in
>> MorphicUIManager>openDebuggerOn:context:label:contents:fullView: 338485116:
>> a(n) MorphicUIManager
>> 0xbff69f64 M WorldState>runStepMethodsIn: 338433128: a(n) WorldState
>> 0xbff69f80 M PasteUpMorph>runStepMethods 338272244: a(n) PasteUpMorph
>> 0xbff69f98 M WorldState>doOneCycleNowFor: 338433128: a(n) WorldState
>> 0xbff69fb4 M WorldState>doOneCycleFor: 338433128: a(n) WorldState
>> 0xbff69fd0 M PasteUpMorph>doOneCycle 338272244: a(n) PasteUpMorph
>> 0xbff69ff0 I [] in Project class>spawnNewProcess 338672796: a(n) Project
>> class
>> 0xbff6a010 I [] in BlockClosure>newProcess 387420956: a(n) BlockClosure
>>
>> Process 0x1711e7fc priority 50
>> 0xbff5ffd0 M WeakArray class>finalizationProcess 337425280: a(n) WeakArray
>> class
>> 0xbff5fff0 I [] in WeakArray class>restartFinalizationProcess 337425280:
>> a(n) WeakArray class
>> 0xbff60010 I [] in BlockClosure>newProcess 387049248: a(n) BlockClosure
>>
>> Process 0x14a27698 priority 80
>> 0xbff60ff0 M Delay class>handleTimerEvent 337430620: a(n) Delay class
>> 0xbff61010 I Delay class>? 337430620: a(n) Delay class
>> 346191180 s [] in Delay class>?
>> 346191416 s [] in BlockClosure>?
>>
>> Process 0x15d37dd0 priority 40
>> 366182080 s [] in SHTextStylerST80(SHTextStyler)>styleInBackgroundProcess:
>> 366181744 s [] in BlockClosure>newProcess
>>
>> Process 0x166a5108 priority 60
>> 0xbff61fd0 I SmalltalkImage>lowSpaceWatcher 340435416: a(n) SmalltalkImage
>> 0xbff61ff0 I [] in SmalltalkImage>installLowSpaceWatcher 340435416: a(n)
>> SmalltalkImage
>> 0xbff62010 I [] in BlockClosure>newProcess 376066092: a(n) BlockClosure
>>
>> Process 0x1711c3d8 priority 60
>> 0xbff64f50 M [] in Delay>wait 387040292: a(n) Delay
>> 0xbff64f70 M BlockClosure>ifCurtailed: 387932080: a(n) BlockClosure
>> 0xbff64f8c M Delay>wait 387040292: a(n) Delay
>> 0xbff64fa4 M InputEventPollingFetcher>waitForInput 337872084: a(n)
>> InputEventPollingFetcher
>> 0xbff64fd0 I InputEventPollingFetcher(InputEventFetcher)>eventLoop
>> 337872084: a(n) InputEventPollingFetcher
>> 0xbff64ff0 I [] in
>> InputEventPollingFetcher(InputEventFetcher)>installEventLoop 337872084: a(n)
>> InputEventPollingFetcher
>> 0xbff65010 I [] in BlockClosure>newProcess 387039996: a(n) BlockClosure
>>
>> processes at priority 10
>> Process 0x166a52d4 priority 10
>> 0xbff63fd0 M ProcessorScheduler class>idleProcess 337424860: a(n)
>> ProcessorScheduler class
>> 0xbff63ff0 I [] in ProcessorScheduler class>startUp 337424860: a(n)
>> ProcessorScheduler class
>> 0xbff64010 I [] in BlockClosure>newProcess 376066552: a(n) BlockClosure
>> $1 = 0
>>
>>
>> Thanks in advance,
>>
>> --
>> Mariano
>> http://marianopeck.wordpress.com
>>
>>
>>
>
>
> --
> best,
> Eliot
>
>


-- 
Mariano
http://marianopeck.wordpress.com
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