On Tue, May 20, 2014 at 12:09 PM, Gerlando Falauto <[email protected]> wrote: > Hi, > > I played a bit more and came to the following conclusion: > > - if I compile the application statically (so the tracepoint calls as well > as their providers are linked with the main executable), tracepoints work > but tracef() doesn't >
You need to enable the DEBUG log level. See the USAGE WITH TRACEF section of the lttng-ust man page. Jérémie > - if I compile and link the tracepoints, as well as the tracepoint calls, > within a shared library, tracef() works but the tracepoint doesn't > > - if I change the above setting and recompile without cleaning first, I end > up with the following message: > > LTTng-UST: Error (-17) while registering tracepoint probe. Duplicate > registration of tracepoint probes having the same name is not allowed. > Aborted > > So this means I'm doing something wrong with linking and/or libraries. > As if I had the same symbol defined in two different places and one would > win over the other according to how I'm compiling. > Since I really have no clue how this whole machinery works, could someone > please shed some light on this topic? > > Thank you! > Gerlando > > On 05/16/2014 10:14 AM, Gerlando Falauto wrote: >> >> Hi, >> >> following up on my own mail: >> >> On 05/15/2014 07:39 PM, Gerlando Falauto wrote: >> [...] >> >>> If I put an additional tracef() call exactly where my tracepoint is >>> located, this gets traced without a problem. So the infrastructure >>> should be all working in my opinion. >> >> >> I repeated my test by compiling the same tracepoint provider directly on >> the target, and linking it to a no-brainer main(), whose body simply >> calls tracepoint() and tracef(). And I now get the opposite result! >> >> Now tracepoint() requests are perfectly recorded, whereas tracef() is >> nowhere to be seen. >> >> Any hints? >> Thank you! >> Gerlando > > > > _______________________________________________ > lttng-dev mailing list > [email protected] > http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev -- Jérémie Galarneau EfficiOS Inc. http://www.efficios.com _______________________________________________ lttng-dev mailing list [email protected] http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
