[squeak-dev] Re: lock up in screen drag

Eliot Miranda eliot.miranda at gmail.com
Tue Jul 19 16:02:39 UTC 2016

> On Jul 18, 2016, at 9:43 PM, marcel.taeumel <Marcel.Taeumel at hpi.de> wrote:
> Eliot Miranda-2 wrote
>> Hi ALl,
>>   I'm seeing a lock up that appears to be on window dragging.  This is on
>> Mac OS X with a new VM.  The symptom is that the screen goes blank.  I see
>> this process when sending SIGUSR1 to the process:
>> Process  0x4800ad0 priority 40
>> 0xbffac304 M [] in Delay>wait 0x4802858: a(n) Delay
>> 0xbffac324 M BlockClosure>ifCurtailed: 0x4a920e0: a(n) BlockClosure
>> 0xbffac340 M Delay>wait 0x4802858: a(n) Delay
>> 0xbffac36c M Rectangle>newRectFrom: 0x4803df0: a(n) Rectangle
>> 0xbffac39c I PluggableSystemWindow(SystemWindow)>doFastFrameDrag:
>> 0x4802740: a(n) PluggableSystemWindow
>> 0xbffac3b8 M PluggableSystemWindow(SystemWindow)>startDragFromLabel:
>> 0x4802740: a(n) PluggableSystemWindow
>> 0xbffac3d8 M EventHandler>send:to:withEvent:fromMorph: 0x4803f30: a(n)
>> EventHandler
>> 0xbffac408 I EventHandler>startDrag:fromMorph: 0x4803f30: a(n)
>> EventHandler
>> 0xbffac428 M StringMorph(Morph)>startDrag: 0x4801458: a(n) StringMorph
>> 0xbffac44c I MouseClickState>drag: 0x4803fc8: a(n) MouseClickState
>> 0xbffac474 M MouseClickState>handleEvent:from: 0x4803fc8: a(n)
>> MouseClickState
>> 0xbffac498 M HandMorph>handleEvent: 0x5cef1a0: a(n) HandMorph
>> 0xbffac4c4 M HandMorph>processEvents 0x5cef1a0: a(n) HandMorph
>> 0xbffac4e0 M [] in WorldState>doOneCycleNowFor: 0x5d1ba70: a(n) WorldState
>> 0xbffac504 M Array(SequenceableCollection)>do: 0x4e6fa10: a(n) Array
>> 0xbffac520 M WorldState>handsDo: 0x5d1ba70: a(n) WorldState
>> 0xbffac540 M WorldState>doOneCycleNowFor: 0x5d1ba70: a(n) WorldState
>> 0xbffac55c M WorldState>doOneCycleFor: 0x5d1ba70: a(n) WorldState
>> 0xbffac578 M PasteUpMorph>doOneCycle 0x52d8780: a(n) PasteUpMorph
>> 0xbffac590 M [] in MorphicProject>spawnNewProcess 0x604fe08: a(n)
>> MorphicProject
>> 0xbffac5b0 I [] in BlockClosure>newProcess 0x48040b8: a(n) BlockClosure
>> _,,,^..^,,,_
>> best, Eliot
> Hi Eliot,
> since you are calling Rectangle >>#newRectFrom:, I suppose you have "Fast
> Morphic Drag" enabled. There, you continuously call Form >>
> #border:width:rule:fillColor:.
> Hence, I think some latest changes in the VM's graphics backend for Mac OSX
> are buggy.

Then should we revert?  I lost a days work did to this.  Tobias?

> Btw: A while ago, Bert did observe that fast drag is faster in SqueakJS than
> it is in the Mac OSX build of the CogVM. :-D 

And this is a criticism of what?

> What's the current state of
> affairs?

That the Mac VM is now unstable, and as my main work platform that is very bad news.

> Best,
> Marcel
> --
> View this message in context: http://forum.world.st/lock-up-in-screen-drag-tp4907062p4907067.html
> Sent from the Squeak - Dev mailing list archive at Nabble.com.

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