Re: [Opengc-devel] Debug-mode failure when built with VC7

[Damion S. <da...@op...>]

Thanks for catching this. I'll make the change in the repository.

Cheers,
-Damion-

On Apr 27, 2004, at 10:59 AM, Tim Crews wrote:

> Steve:
>
>    I already fixed the debug errors in my local checked-out copy by 
> changing three declarations of buffer[1] to buffer[2].  The
> resulting executable did run without run-time errors.  Just search for 
> "buffer[1]" in all files to find the three occurrences.
>
> Tim
>
> -----Original Message-----
> From: ope...@li...
> [mailto:ope...@li...]On Behalf Of Doyle,
> Steven
> Sent: Tuesday, April 27, 2004 7:52 AM
> To: 'ope...@li...'
> Subject: RE: [Opengc-devel] Debug-mode failure when built with VC7
>
>
> Tim,
>
> I didn't actually fix this, but why don't you try commenting out the
> construction of the speed tape in ogcBoeing777PFD.cpp then see if it 
> will
> run.
>
> Cheers
>
> steve
>
> -----Original Message-----
> From: Tim Crews [mailto:tim...@ge...]
> Sent: 27 April 2004 15:46
> To: ope...@li...
> Subject: RE: [Opengc-devel] Debug-mode failure when built with VC7
>
>
> Steve:
>
>     The source I am building is straight from CVS.
>
> Tim
>
> -----Original Message-----
> From: ope...@li...
> [mailto:ope...@li...]On Behalf Of Doyle,
> Steven
> Sent: Tuesday, April 27, 2004 12:02 AM
> To: 'ope...@li...'
> Subject: RE: [Opengc-devel] Debug-mode failure when built with VC7
>
>
> Hi,
>
> Yes I can also confirm this, I don't use the speed tape so it doesn't 
> affect
> me. I should of mentioned it before . Are what version of OGC are you 
> using
> ?
>
> Cheers
>
> Steve
>
> -----Original Message-----
> From: Tim Crews [mailto:tim...@ge...]
> Sent: 26 April 2004 18:30
> To: ope...@li...
> Subject: [Opengc-devel] Debug-mode failure when built with VC7
>
>
> Hello:
>
> I have been building the OpenGC code under Microsoft Visual Studio .NET
> (Version 7).  I am building the Debug target.  When I run it
> under the debugger, I get frequent run-time error checks saying that 
> the
> stack frame is corrupted around the variable "buffer".
>
> An example of this can be found in ogcBoeing777SpeedTape.cpp,
> ogcBoeing777SpeedTape::Render, which declares
>
> 	char buffer[1];
>
> and has many lines that look like this:
>
> 	sprintf( buffer, "%i", charSpd/100);
>
> Even when the result of (charSpd/100) is one digit, sprintf is
> null-terminating the string that it is writing to.  This is resulting
> in a desired write to &(Buffer[0]), but also an undesired write to
> &(Buffer[0])+1. I believe this is what the MSVC debugger is
> complaining about, since it puts guard data around each variable on the
> stack, and detects corruption of that guard data.
>
> To confirm this, and modified the declaration of Buffer to look like 
> this:
>
> 	char buffer[2];
>
> and modified the sprintf code to look like this:
>
>         buffer[1] = 255;
> 	sprintf( buffer, "%i", charSpd/100);
>
> After stepping over the sprintf, sure enough buffer[1] is zero.
>
> Tim Crews
> GECO, Inc
> Mesa, Arizona, USA
>
>
>
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---------
Damion Shelton
Carnegie Mellon University, Robotics Institute
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