DWT+OpenGL crashing on Vista
wbaxter at gmail.com
Sun Jan 18 14:17:16 PST 2009
Here's a modified version of one of the DWT opengl snippets that
reproduces the crash for me.
About 1 in 10-15 runs this will crash (seems to be inside the GL
driver) soon after startup with the error:
dwt.DWTException.DWTException: Failed to execute runnable
object.Exception: Access Violation
Can anyone else reproduce this (particularly Vista users)?
I'd be happy to send the exe to anyone who would like to try it off
list. But it's a 3MB exe (compresses to about .7 MB).
On Sun, Jan 18, 2009 at 11:35 PM, Sergey Kovrov
<kovrov+digitalmars at gmail.com> wrote:
> On 1/18/2009 5:51 AM, Bill Baxter wrote:
>> So far haven't been able to isolate it.
>> I updated another program that displays meshes with similar code and
>> it works fine.
>> So sounds like some kind of memory problem in my code to me too. Or
>> possibly passing a bad pointer to GL somewhere. I have glGetError's
>> sprinkled all over my code and get no errors from that. But GL
>> doesn't know if you pass it a bad pointer.
>> I remember one problem I had long ago when I called glGetIntegerv for
>> something, thinking it returned 1 value when it actually returned two.
>> Seems likely it could be something similar here.
> You could check if you have "wild" Client State somewhere ("wild" like in
> "wild pointers"). It is easy to forget to call glDisableClientState for some
> of GL_..._ARRAY capability when it no longer needed. And in such case error
> might manifest it self in an unusual way, just like in case of generic
> dangling pointers.
> -- serg.
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