fyi
Begin forwarded message:
From: David Röthlisberger squeak@c3com.ch Date: April 16, 2008 1:15:57 AM PDT (CA) To: johnmci@smalltalkconsulting.com Subject: Re: [squeak-dev] Image crashes just after start-up
Hi John,
Ok, so does this VM work with a base image, or it only a problem with your image?
The VM works well with a normal image, it's only a problem with this specific image. And even for that image it worked well for a couple of weeks. Then I implemented an application drawing a graph on a BalloonCanvas. Whenever I execute this application, the image crashes. Sometimes directly after starting the application, but in most cases I can use the app without problems, but when I then save the image after having executed one specific feature, it crashes on image start-up. I could track the error down to the method FormCanvas >> drawString:from:to:in:font: color:. Whenever this method gets executed with some specific parameters, then the crash will happen. It seems to me that the bounds parameter has corrupt data, eg. numbers not properly stored. But how this happens I don't know.
usually points to a problem with the VM crashing either because the image is corrupt or you have corrupted memory via an FFI call, or perhaps passing bad data to the sound system.
I don't use FFI, neither I pass data to the sound system, so probably this means that the image is corrupt. I guess that some objects get created that are corrupt. But why can this happen?
I also note you run Application Enhancer, perhaps turn that off and see if it changes anything?
ok, I turned it off, but this doesn't make a difference.
David
-- = = = ======================================================================== John M. McIntosh johnmci@smalltalkconsulting.com Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com = = = ========================================================================
One thing that comes to mind is that there have been BitBlt versions been flying around a while ago (distributed with the Freetype stuff). It would be worthwhile to remove *all* DLLs/SOs next to the Squeak VM to make sure none of these is accidentally picked up.
Cheers, - Andreas
John M McIntosh wrote:
fyi
Begin forwarded message:
From: David Röthlisberger squeak@c3com.ch Date: April 16, 2008 1:15:57 AM PDT (CA) To: johnmci@smalltalkconsulting.com Subject: Re: [squeak-dev] Image crashes just after start-up
Hi John,
Ok, so does this VM work with a base image, or it only a problem with your image?
The VM works well with a normal image, it's only a problem with this specific image. And even for that image it worked well for a couple of weeks. Then I implemented an application drawing a graph on a BalloonCanvas. Whenever I execute this application, the image crashes. Sometimes directly after starting the application, but in most cases I can use the app without problems, but when I then save the image after having executed one specific feature, it crashes on image start-up. I could track the error down to the method FormCanvas >> drawString:from:to:in:font: color:. Whenever this method gets executed with some specific parameters, then the crash will happen. It seems to me that the bounds parameter has corrupt data, eg. numbers not properly stored. But how this happens I don't know.
usually points to a problem with the VM crashing either because the image is corrupt or you have corrupted memory via an FFI call, or perhaps passing bad data to the sound system.
I don't use FFI, neither I pass data to the sound system, so probably this means that the image is corrupt. I guess that some objects get created that are corrupt. But why can this happen?
I also note you run Application Enhancer, perhaps turn that off and see if it changes anything?
ok, I turned it off, but this doesn't make a difference.
David
--
John M. McIntosh johnmci@smalltalkconsulting.com Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com ===========================================================================
For os-x this would be
BitBltPlugin.bundle
which is NOT distributed by default, and would be either in a Plugins folder by the app, or in the Resource folder within the *.app if the user stuck it in there, or perhaps the VM is coming from some third party.
On Apr 16, 2008, at 10:49 AM, Andreas Raab wrote:
One thing that comes to mind is that there have been BitBlt versions been flying around a while ago (distributed with the Freetype stuff). It would be worthwhile to remove *all* DLLs/SOs next to the Squeak VM to make sure none of these is accidentally picked up.
Cheers,
- Andreas
-- = = = ======================================================================== John M. McIntosh johnmci@smalltalkconsulting.com Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com = = = ========================================================================
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Andreas Raab -
John M McIntosh