LTTng-UST, the Linux Trace Toolkit Next Generation Userspace Tracer, is
port of the low-overhead tracing capabilities of the LTTng kernel tracer
to user-space. The library "liblttng-ust" enables tracing of
applications and libraries.

Changelog:

2011-12-23 lttng-ust 1.9.4
* Split liblttng-ust into liblttng-ust and liblttng-ust-tracepoint libs
* Comment the union field (only used in call_rcu scheme)

Project website: http://lttng.org/lttng2.0
Download link: http://lttng.org/files/lttng-ust/
(please refer to the README file for installation instructions)