1 .TH "LTTNG-UST-DL" "3" "December 19, 2013" "" ""
4 lttng-ust-dl \(em LTTng UST 2.x Dynamic Linker Tracing
7 Launch your application with:
9 \fBLD_PRELOAD=liblttng-ust-dl.so\fP appname
11 This LD_PRELOAD library causes all calls to dlopen and dlclose in the
12 application to be traced with LTTng. The following two events need to be
13 enabled: ust_baddr:push and ust_baddr:pop.
16 The events have the following detailed definitions:
19 This event is used to trace dlopen calls. The base address (where the dynamic
20 linker has placed the shared object) is recorded in the baddr-field. The path
21 to the shared object gets recorded in the sopath-field (as string). The file
22 size of the loaded object (in bytes) is recorded to the size-field and its time
23 of last modification (in seconds since Epoch) is recorded in the mtime-field.
25 This event is used to trace dlclose calls. The base address of the shared
26 object that got closed is recorded in the baddr-field.
30 lttng-ust(3), dlopen(3), lttng(1)
32 If you encounter any issues or usability problem, please report it on
33 our mailing list <lttng-dev@lists.lttng.org> to help improve this
36 liblttng-ust is distributed under the GNU Lesser General Public License
37 version 2.1. The headers are distributed under the MIT license.
39 See http://lttng.org for more information on the LTTng project.
41 Mailing list for support and development: <lttng-dev@lists.lttng.org>.
43 You can find us on IRC server irc.oftc.net (OFTC) in #lttng.
45 liblttng-ust was originally written by Mathieu Desnoyers, with additional
46 contributions from various other people. It is currently maintained by
47 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>.