From:	"A. Sinan Unur" <asu1 AT c-o-r-n-e-l-l DOT edu>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: problem with malloc and free
Date:	14 Dec 2002 22:15:24 GMT
Organization:	Cornell University
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"Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il> wrote in news:3277-
Sun15Dec2002000831+0200-eliz AT is DOT elta DOT co DOT il:

>> From: "Lars O. Hansen" <lars DOT o DOT hansen AT gmx DOT de>
>> Newsgroups: comp.os.msdos.djgpp
>> Date: Sat, 14 Dec 2002 16:30:55 +0100
>> >
>> > Call frame traceback EIPs:
>> >   0x00003825 _free+77
>> >   0x000018bb _freeall+99
>> >   0x0000353f _exit+31
>> >   0x0000171f _main+31
>> >   0x00003138 ___crt1_startup+176
>> 
>> also as you can see in the traceback in Re to Richard, it crashed in
>> the first free. So free is somehow the problem.
> 
> Crashes inside `free' or `malloc' usually mean that your program
> overwrites buffers allocated with `malloc' and thus destroys hidden
> data about the heap stored by `malloc' at both ends of the buffer it
> allocates.
> 
> So you need to look for such bugs in your program.

in fact, they are pretty easy to locate. see my earlier response to the 
OP.

-- 
A. Sinan Unur
asu1 AT c-o-r-n-e-l-l DOT edu
Remove dashes for address
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