Re: gdb + cygwin

[Earnie Boyd <earnie_boyd@yahoo.com>]

--- Charles Wilson <cwilson@ece.gatech.edu> wrote:
> Earnie Boyd wrote:
> <snip>
> 
> > Hi Chuck,
> >
> > I've seen this when I have a pointer reference that isn't being referenced
> > correctly.  Perhaps a prototype is incorrect or not specified.  Perhaps you
> > have a pointer becoming an integer or an integer becoming a pointer, either
> way
> > you're in trouble.
> >
> > Use the -Wall switch on the compilation and don't ignore the warnings.  If
> it
> > has to do with a pointer, it's an ERROR not a WARNING.
> 
> 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.
===
"Earnie Boyd" <mailto:earnie_boyd@yahoo.com>
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