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Message-ID:	<3749A6A1.3D078A97@ece.gatech.edu>
Date:	Mon, 24 May 1999 15:21:05 -0400
From:	Charles Wilson <cwilson AT ece DOT gatech DOT edu>
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To:	earnie_boyd AT yahoo DOT com
CC:	cygwin AT sourceware DOT cygnus DOT com
Subject:	Re: gdb + cygwin
References:	<19990524175534 DOT 4577 DOT rocketmail AT web116 DOT yahoomail DOT com>

Earnie Boyd wrote:

> --- Charles Wilson <cwilson AT ece DOT gatech DOT edu> wrote:
> >
> > Okay, I tried this:
> >     gcc -Wall -c smain.c ===> no errors
> >     gcc -Wall -c gaaout.c ===> a few errors having to do with a return (no
> > args)
> > in a function that isn't supposed to return void. After I fixed 'em,
> >
> >     gcc -Wall -c gaaout.c ===> no errors
> >     gcc -o smain smain.o gaaout.o ===> no errors
> >
> > execute `smain' ==> core dump. sigh.
>
> How about referencing memory location zero due to a NULL pointer reference?
> This will always SIGSEGV.
>
> BTW, Mumit always suggests using Purify or ElectricFence to check the memory
> allocation.  I've often suggested using the -lmmalloc library.

Well, linking with electricfence on HP-UX showed no problems. Will electricfence
run in cygwin? (I would just try it and see, but perens.com seems to be down right
now, so I can't get the source code). Also, does efence check for NULL pointer
references in addition to memory allocation errors?

--Chuck



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