* Sébastien Barthélémy (barthel...@crans.org) wrote: > Hi Mathieu, > > thank you for you help, it is much appreciated. > > 2011/12/16 Mathieu Desnoyers <comp...@krystal.dyndns.org>: > > * Sébastien Barthélémy (barthel...@crans.org) wrote: > >> > >> using ust debug mode, I noticed this error message: > >> libust[30999/31001]: Error: futex: Bad address (in > >> wait_for_sessiond() at lttng-ust-comm.c:571) > > > > I changed this so it only shows up if "LTTNG_UST_DEBUG" env var is set > > I set that var. > > >> a shared library. I probably have missed some obvious step. > > > This diff to the makefile makes it work here (you forgot to add > > ust_motion.o to your .so). > > That was indeed an obvious step to miss! Indeed it fixes the example > here too, thank you. > > Alas, that does not solve my original problem: I'm trying to add > tracing to a bigger application, > for which tracing does not really work yet. > > The example I sent was just a attempt to reproduce my problems on a > simpler application. > I guess I was just too happy to reproduce it on such a simple program, that I > sent it to the ML without double checking. Sorry for that (and thank you > again). > > Back to my original problem now: the application I'd like to add > tracing to loads plugins > (dlopened shared libraries I guess). Tracepoints added to these > plugins are never logged > anywhere. However, traces added to the main executable show up in > babeltrace. I probably > have some link problem again, what do you think?
Please try to reproduce this problem in a simple application that uses dlopen to load libs. > > A better understanding of the way probes are enabled would probably > help me debug it. > Is it documented somewhere? Or could you point me to the right source file? liblttng-ust/tracepoint.c liblttng-ust/ltt-probe.c include/lttng/tracepoint.h include/lttng/ust-tracepoint-event.h would be a good start, Best regards, Mathieu > > Thank you again. > > Regards > -- Sebastian > > _______________________________________________ > lttng-dev mailing list > lttng-dev@lists.lttng.org > http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev > -- Mathieu Desnoyers Operating System Efficiency R&D Consultant EfficiOS Inc. http://www.efficios.com _______________________________________________ lttng-dev mailing list lttng-dev@lists.lttng.org http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
