Date: Sat, 10 Apr 2004 17:30:52 -0700 (PDT) From: Ted Unangst <tedu@stanford.edu> To: Brandon Erhart <berhart@ErhartGroup.COM> Cc: freebsd-hackers@freebsd.org Subject: Re: FreeBSD and Debugging? Message-ID: <Pine.GSO.4.44.0404101502460.5306-100000@elaine29.Stanford.EDU> In-Reply-To: <6.0.2.0.2.20040409230629.01cc1ec0@mx1.erhartgroup.com>
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On Fri, 9 Apr 2004, Brandon Erhart wrote: > Are there any debuggers out there for BSD that will detect the heap/stack > corruption!? [standard disclaimer and note about self-promotion goes here :)] valgrind and electric fence are very good suggestions. my own personal pet project was adding guard pages to the system malloc. then linking malloc.conf -> AFGJ or setenv MALLOC_OPTIONS and you can find bugs in all the software you run. it's less complete than a dedicated heap checker, but lightweight enough (well, 20% penalty may not be light for some) that i run with it full time. we've had a fairly significant amount of success with it finding bugs in software that just happened to work. http://www.zeitbombe.org/patches/malloc_guard.diff should apply pretty cleanly to freebsd's malloc.c --
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