Re: Need advice on how to debug

On Thu, 22 Jan 2004, Robert Collins wrote:

> Not that I've used :[. There was a linux distro with stack-protection in
> gcc IIRC.

Found two..

  Immunix with the StackGuard extension
  <url:http://www.immunix.com/>

  Gento with the Stack Smashing Protector (similar to StackGuard)
  <url:http://www.gentoo.org/>
  <url:http://www.research.ibm.com/trl/projects/security/ssp/>

Currently setting up a Gentoo development environment to try out the ssp
extension.

> I asked a gcc hacker I know and was pointed at 'mudflap' as
> 'promising'.

Indeed, mudflap looks VERY interesting, but somewhat hard to find
documentation on it seems. Finally I found some good documentation on the
GCC Summit 2003 proceedings and from what it looks this is a GCC
extension no C/C++ developer should be without.

It seems the Fedora Core 2 will include a mudflap enabled GCC and there is
already prebuild packages available. More information shortly (installed
and Squid compile running..)

> Possibly valgrind or another profiler could give you some detail too.

have not suceeded in trapping the error with valgrind yet, but it may
simply be a matter of time.

I will defenitely try the ssp and mudflap approaches immediately (pending
installation first..).

Regards
Henrik
Received on Thu Jan 22 2004 - 04:47:01 MST