tracef - LTTng-UST printf(3)-like interface

LTTng-UST was originally written by Mathieu Desnoyers, with additional contributions from various other people. It is currently maintained by Mathieu Desnoyers <mailto:mathieu.desnoyers@efficios.com>.

If you encounter any issue or usability problem, please report it on the LTTng bug tracker <https://bugs.lttng.org/projects/lttng-ust>.

This macro is part of the LTTng-UST project. This macro is distributed under the GNU Lesser General Public License, version 2.1 <http://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html>. See the COPYING <https://github.com/lttng/lttng-ust/blob/v2.13/COPYING> file for more details.

The tracef() macro is part of version 0 of the LTTng-UST API (see the “Compatibility with previous APIs” section of lttng-ust(3)). Prefer using lttng_ust_tracef(3) which is part of version 1 of the API and has the lttng_ust_ namespace.

tracef - LTTng-UST printf(3)-like interface

• LTTng project website <http://lttng.org> • LTTng documentation <http://lttng.org/docs> • Git repositories <http://git.lttng.org> • GitHub organization <http://github.com/lttng> • Continuous integration <http://ci.lttng.org/> • Mailing list <http://lists.lttng.org> for support and development: lttng-dev@lists.lttng.org • IRC channel <irc://irc.oftc.net/lttng>: #lttng on irc.oftc.net

lttng_ust_tracef(3), lttng_ust_vtracef(3) LTTng 2.13.9 04/14/2025 TRACEF(3)

#include<lttng/tracef.h> #define tracef(fmt, ...) Link with -llttng-ust-llttng-ust-common.

Thanks to Ericsson for funding this work, providing real-life use cases, and testing. Special thanks to Michel Dagenais and the DORSAL laboratory <http://www.dorsal.polymtl.ca/> at École Polytechnique de Montréal for the LTTng journey.