Path: utzoo!attcan!uunet!virtech!cpcahil
From: cpcahil@virtech.uucp (Conor P. Cahill)
Newsgroups: comp.unix.sysv386
Subject: Re: malloc
Keywords: fails
Message-ID: <1990Dec12.021137.14876@virtech.uucp>
Date: 12 Dec 90 02:11:37 GMT
References: <537@comcon.UUCP>
Reply-To: cpcahil@virtech.UUCP (Conor P. Cahill)
Organization: Virtual Technologies Inc., Sterling VA
Lines: 33

In article <537@comcon.UUCP> tim@comcon.UUCP (Tim Brown) writes:
>Does anyone know why this code should core dump?

  [description of malloc related problem deleted]
>
>On my system, ISC2.2, it core dumps on the third time thru.  On an
>IBM6000, it works as expected.  I suspect a bug in ISC's malloc.  How
>are others doing this?  

I don't suspect a bug in malloc.  instead I expect the problem to be
in your code either with the malloc area that you are talking about, 
or with another area that is being overrun.

I have developed a debugging version of malloc (which was posted to c.s.u
back in may/june) that would probably solve this problem with just a recompile.

If you can't get the library from a nearby archive, send me email and I will
forward a copy to you.

>It core dumps at the malloc according to sdb.

This is probably due to the fact that some malloc memory has been overrun
thereby trashing the malloc chain.

>I know this is comp.lang.c stuff but it seems to possibly be isolated
>to ISC.

I doubt it is tied to ISC.

-- 
Conor P. Cahill            (703)430-9247        Virtual Technologies, Inc.,
uunet!virtech!cpcahil                           46030 Manekin Plaza, Suite 160
                                                Sterling, VA 22170