Message-Id: <4.1.19990602155545.00a21100@hal.nt.tuwien.ac.at>
X-Sender: tony AT hal DOT nt DOT tuwien DOT ac DOT at
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Date: Wed, 02 Jun 1999 16:23:12 +0200
To: djgpp AT delorie DOT com
From: Anton Helm <tony AT nt DOT tuwien DOT ac DOT at>
Subject: problems debugging segfault
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Reply-To: djgpp AT delorie DOT com

I'm still "remote debugging" one of my programs that crashes
on a PC some thousand km from here.

1) The program works fine when buildt with DJGPP v2.01
2) When buildt with v2.02 I get a seg-fault in
   malloc+349

I know this looks very much like a memory problem
(either allocated not enough memory somewhere or freed twice ...).

3) I used MSS v1.2 to build a testversion of the program.
   Setting the MSS options to "paranoid" (well, you know ...)
   I sent the program to the remote user and asked him to mail me the
   MSS logfile. The testversion of the program worked there without ANY
   problem. It produced a rather big logfile which I searched carefully.
   No warnings or errors in this file.

So I'm somewhat worried now ...

Any hints for further debugging would be helpful.
As the user on the other end of the net has no programming skills it is 
hopeless to ask him to run the program with gdb.
All I can do is sending him programs and ask "What's happening now?"

Tony


P.S.: The problem is not reproducable here, mostly because I don't have
the device available that the program exchanges data with across COM1.


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Dipl.-Ing. Anton HELM   *T*  mailto:tony AT nt DOT tuwien DOT ac DOT at
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