[Vm-dev] Crash on start-up.

[Eliot Miranda]

when you run it on linux under gdb what's teh stack trace for the seg fault?
On Wed, Mar 18, 2009 at 12:49 AM, Michael van der Gulik
<mikevdg at gmail.com>wrote:

>
>
> Hi VM guys.
>
> Does anybody have any insights into the following?:
>
> I get the following crash. I've tried this on a Windows VM of unknown
> version and a 3.9-alpha Linux VM with the same result:
>
> Segmentation fault
>
> -1528952856 [] in Semaphore>critical:
> -1528953680 BlockContext>ensure:
> -1528953772 Semaphore>critical:
> -1528953864 >clearExternalObjects
> -1528953956 SystemDictionary>clearExternalObjects
> -1529116848 SmalltalkImage>snapshot:andQuit:embedded:
> -1529116940 SmalltalkImage>snapshot:andQuit:
> -1529117032 TheWorldMenu>saveAndQuit
> -1529117216 TheWorldMenu>doMenuItem:with:
> -1529117308 [] in MenuItemMorph>invokeWithEvent:
> -1529117400 BlockContext>ensure:
> -1529117492 Cursor>showWhile:
> -1529117712 MenuItemMorph>invokeWithEvent:
> -1529117804 MenuItemMorph>mouseUp:
> -1529117896 MenuItemMorph>handleMouseUp:
> -1529118028 MouseButtonEvent>sentTo:
> -1529118120 Morph>handleEvent:
> -1529118212 MorphicEventDispatcher>dispatchDefault:with:
> -1529118304 MorphicEventDispatcher>dispatchEvent:with:
> -1529118396 Morph>processEvent:using:
> -1529118488 MorphicEventDispatcher>dispatchDefault:with:
> -1529118596 MorphicEventDispatcher>dispatchEvent:with:
> -1529118728 Morph>processEvent:using:
> -1529118820 Morph>processEvent:
> -1529118912 MenuMorph>handleFocusEvent:
> -1529119188 [] in HandMorph>sendFocusEvent:to:clear:
> -1529119096 [] in PasteUpMorph>becomeActiveDuring:
> -1529119280 BlockContext>on:do:
> -1529119372 PasteUpMorph>becomeActiveDuring:
> -1529119556 HandMorph>sendFocusEvent:to:clear:
> -1529119648 HandMorph>sendEvent:focus:clear:
> -1529119740 HandMorph>sendMouseEvent:
> -1529119884 HandMorph>handleEvent:
> -1529120168 HandMorph>processEvents
> -1529120076 [] in WorldState>doOneCycleNowFor:
> -1529120260 SequenceableCollection>do:
> -1529120352 WorldState>handsDo:
> -1529120444 WorldState>doOneCycleNowFor:
> -1529120536 WorldState>doOneCycleFor:
> -1529120628 PasteUpMorph>doOneCycle
> -1529214452 [] in >spawnNewProcess
> -1529214268 [] in BlockContext>newProcess
> Segmentation fault (core dumped)
>
> This happens on start-up. None of the VM flags I tried make a difference.
>
> I suspect this may have caused it:
>
> !EventSensor methodsFor: 'as yet unclassified' stamp: 'mvdg 3/17/2009
> 21:54' prior: 36505616!
> startUp
>  [
>   panicButtonPressed := false.
>
>   Smalltalk.Sensor shutDown.
>   inputSemaphore := Semaphore new.
>   Smalltalk.ExternalSemaphoreTable registerExternalObject: inputSemaphore.
>   self primSetInputSemaphore: inputSemaphore.
>
>   self enterEventLoop.
>  ] ensure: [
>   Smalltalk.Sensor startUp.
>   Smalltalk.Display restore.
>  ].! !
>
> This code worked fine until I saved, quit and tried to reopen the image.
>
> Note that this class is actually defined in my namespaces implementation -
> it does not exist in the SystemDictionary and has it's environment set to an
> instance of Namespace. It is my own implementation of EventSensor and I've
> added the primitive methods to it. I'm not sure if any of this matters.
>
> I'm going to put this image aside rather than try to fix the above and make
> a new image so I can continue my work. This problem will continue to exist,
> however, so if I have any breakthroughs as to what is happening, I'll post a
> reply.
>
> Gulik.
> --
> http://gulik.pbwiki.com/
>
>
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