[lttng-dev] UST tracepoints, same provider, different files

[Mathieu Desnoyers]

yes, please open a bug on bugs.lttng.org

* Simon Marchi (simon.marchi at polymtl.ca) wrote:
> Ok.
> 
> When trying to instrument a bigger application (memcached) with the
> same pattern, I witnessed a different behavior. No crash on assert,
> but only one tracepoint would get correctly registered at the
> application startup (as I mentionned on IRC this weekend). So the
> behavior when doing this seems undefined. Maybe this restriction
> should be documented ? It seemed natural to me at first to put each
> tracepoint in its own .tp file.
> 
> On 29 April 2013 12:25, Mathieu Desnoyers
> <mathieu.desnoyers at efficios.com> wrote:
> > You should not create two compilation units with the same provider name
> > in your application. This assertion is there to check just that.
> >
> > * Simon Marchi (simon.marchi at polymtl.ca) wrote:
> >> Hello !
> >>
> >> I am trying to add two tracepoints to a simple test application. If I
> >> put both tracepoints in different compilation units (two .c files),
> >> UST crashes when the application starts with the following message:
> >>
> >> test: /usr/local/include/lttng/ust-tracepoint-event.h:685:
> >> __lttng_events_init__my_project: Assertion `!ret' failed.
> >>
> >> I made an example [1] so you can simply run "make && ./test". I am
> >> using the latest git versions, on Ubuntu 13.04 x86_64.
> >>
> >> Thanks !
> >>
> >> Simon
> >>
> >> [1] http://git.dorsal.polymtl.ca/~smarchi?p=ust-test.git;a=summary
> >>
> >> _______________________________________________
> >> lttng-dev mailing list
> >> lttng-dev at lists.lttng.org
> >> http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
> >
> > --
> > Mathieu Desnoyers
> > EfficiOS Inc.
> > http://www.efficios.com
> >
> > _______________________________________________
> > lttng-dev mailing list
> > lttng-dev at lists.lttng.org
> > http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev

-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com