Howard Chu
Tue, 20 Feb 2007 20:04:20 -0800
Henry B. Hotz wrote:
On Feb 20, 2007, at 6:52 PM, Howard Chu wrote:valgrind is definitely cool, for Linux. There are other good malloc debuggers out there. FunctionCheck works on Linux and Solaris. http://www.highlandsun.com/hyc/#fncchkI have an app with a slow leak that uses it, but I can't be sure it doesn't have to do with funny linking conflicts or external issues. The leak goes away if I link against Sun Kerberos, but I'm not supposed to do that. ;-)Tried valgrind? That's how I found this leak in the first place.I used the Sun malloc debugger, libumem. The functionality appears fine, but I can't compare it to anything. It said unequivocally that I did not have a leak, but some unrelated Sun library did. Remove my code and the other library suddenly no longer has a leak.|-PBeen using the above mentioned fix, so not sure how much I care, but it might come back to haunt me.
Perhaps it was just unable to backtrack far enough in the call stack to identify the original caller. (Or more to the point, it was unable to make sense of the call stack at all, which happens a lot with optimized libraries.) I've only used libumem as a basic malloc replacement, never tried out any of its other features. It's a nice malloc library, to be sure, although the last time I checked it had some non-portable assumptions about word size. (I submitted a few patches to get it to run cleanly on AMD64.)
------This is definitely off-topic, but Sun's version of the Kerberos libraries is in /usr/lib/gss/gl/mech_krb5.so. It's originally based off of MIT 1.2.1, so if you compare the krb5.h definitions in 1.2.1 with what's in current OpenSolaris and there's no difference you're pretty safe assuming the definition is valid for Solaris 9 or 10 as well. (I hope Nico doesn't kill me for saying that. ;-)
Yeah, I've built code using MIT headers with the Sun libraries. I consider that a desperate measure, especially given the MIT code's lousy behavior in a threaded program.
That becomes moot in June when S10 u4 is released. It's supposed to open up the MIT API.
-- -- Howard Chu Chief Architect, Symas Corp. http://www.symas.com Director, Highland Sun http://highlandsun.com/hyc Chief Architect, OpenLDAP http://www.openldap.org/project/