From: "florianx" <florianx AT drdos DOT org>
Newsgroups: comp.os.msdos.djgpp
References: <Pine DOT SUN DOT 3 DOT 91 DOT 1010121111642 DOT 13920S-100000 AT is> <3a6ab865$0$25126 AT SSP1NO25 DOT highway DOT telekom DOT at> <94h659$gnf$1 AT nets3 DOT rz DOT RWTH-Aachen DOT DE>
Subject: Re: silly question: SIGSEGV
Date: Mon, 22 Jan 2001 21:03:21 +0100
Organization: Club Dr-DOS - www.drdos.org
X-Newsreader: Microsoft Outlook Express 4.71.1712.3
X-MimeOLE: Produced By Microsoft MimeOLE V4.71.1712.3
Lines: 56
Message-ID: <3a6c9209$0$12666@SSP1NO25.highway.telekom.at>
NNTP-Posting-Host: 212.183.88.185
X-Trace: newsreader01.vienna.highway.telekom.at 980193801 12666 212.183.88.185
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

>>   0xffd94c14 0xffd94c14   <------------- funtktion in the DLX program
>>   0x00003d23 _dispose+31, line 1476 of program.c
>
>This *may* be part of your problem. Note that dispose() is being
>called recursively, with only that slightly volatile 'DLX program' in
>between. Iff that routine uses any kind of non-volatile storage in a
>way DLX doesn't expect, this could get you in trouble.

The Program is a GUI, first it shut down all subviews, then the view, so it
must be recursively. :(

>
>> I used it, but they couldn't show me more infos, because of the DLXs
>> and because some *.c files are included into the main file program.c
>> via fe. #include"object.c".
>
>Two solutions to that:
>
>1) use -gstabs+ or -ggdb instead of -g in GCC

Thx. I will also try -ggdb

Does somebody know, what I can use for DLX instead of -gstabs+? It doesn't
go (DLX files cannot be loaded).

>
>2) Don't #include *.c files into one another. It's bad style, anyway.
>
>> Yes, I tried it. I think it tries to remove a memory block which wasn't
>> right allocated via malloc.
>
>Or which got its internal bookkeeping datastructures damaged. For this
>type of problem, YAMD would be my recommendation. If it's possible to
>run your app under YAMD, it'll find the bug much more quickly than you
>can do it yourself using code-snippeting. It'll crash your app exactly
>at the point where it tries overwrites crucial stuff.

Ok, that's a way? Do you have the link?

>
>> All free() commands where replaced by a macro like this:
>
>That macro does nothing useful on DJGPP. You might want to get rid of
>it.

I haven't written it. I think, Michal used it, because he want to implement
some features, but I don't know.

Thanks!! Bye, Florian
"Oisdaunn, passt's auf...und losst's eich nix gfoin!!"
-- Club Dr-DOS - the unofficial Lineo Dr-DOS page - http://www.drdos.org
-- http://www.seal.de.vu - SEAL The official FreeDOS GUI project
-- "I brauch kan Dokta...Mia hilft nur da Rock&Roll" - http://www.ostbahn.at