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1 | .TH "LTTNG-UST-DL" "3" "December 19, 2013" "" "" |
2 | ||
3 | .SH "NAME" | |
4 | lttng-ust-dl \(em LTTng UST 2.x Dynamic Linker Tracing | |
5 | ||
6 | .SH "SYNOPSIS" | |
7 | Launch your application with: | |
8 | .TP | |
9 | \fBLD_PRELOAD=liblttng-ust-dl.so\fP appname | |
10 | .PP | |
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. | |
14 | ||
15 | .SH "DESCRIPTION" | |
16 | The events have the following detailed definitions: | |
17 | .PP | |
18 | .IP "ust_baddr:push" | |
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. | |
24 | .IP "ust_baddr:pop" | |
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. | |
27 | .PP | |
28 | ||
29 | .SH "SEE ALSO" | |
30 | lttng-ust(3), dlopen(3), lttng(1) | |
31 | .SH "BUGS" | |
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 | |
34 | project. | |
35 | .SH "CREDITS" | |
36 | liblttng-ust is distributed under the GNU Lesser General Public License | |
37 | version 2.1. The headers are distributed under the MIT license. | |
38 | ||
39 | See http://lttng.org for more information on the LTTng project. | |
40 | ||
41 | Mailing list for support and development: <lttng-dev@lists.lttng.org>. | |
42 | ||
43 | You can find us on IRC server irc.oftc.net (OFTC) in #lttng. | |
44 | .SH "AUTHORS" | |
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>. |