Ubuntu Manpage: lttng-gen-tp - Generate LTTng-UST tracepoint provider code

Provided by: liblttng-ust-dev_2.13.1-1ubuntu1_amd64

NAME

       lttng-gen-tp - Generate LTTng-UST tracepoint provider code

SYNOPSIS

       lttng-gen-tp [--verbose] [--output=FILE.c]
                    [--output=FILE.h] [--output=FILE.o] TEMPLATE

DESCRIPTION

The lttng-gen-tp tool simplifies the generation of LTTng-UST tracepoint provider files. It takes a simple
template file, TEMPLATE, and generates the necessary C code to use the defined tracepoints in your
application. See the Template file format section below for more information about the format of
TEMPLATE.

Currently, lttng-gen-tp can generate the .h, .c, and .o files associated with your tracepoint provider.
The generated .h file can be included directly in your application. You can let lttng-gen-tp generate the
.o file or compile the .c file yourself. See lttng-ust(3) for more information about compiling LTTng-UST
tracepoint providers.

By default, lttng-gen-tp generates the .h, .c, and .o files, their basename being the basename of
TEMPLATE. You can generate one or more specific file types with the --output option, repeated if needed.

Template file format
The template file, which usually has the .tp extension, contains a list of LTTNG_UST_TRACEPOINT_EVENT()
definitions and other optional definition entries, like LTTNG_UST_TRACEPOINT_LOGLEVEL(). See lttng-ust(3)
for the complete list of available definitions.

The LTTNG_UST_TRACEPOINT_EVENT() definitions are written as you would write them in an LTTng-UST template
provider header file. C comments are supported (/* */ and //), as well as lines starting with #.

Note

The provider name (the first argument of LTTNG_UST_TRACEPOINT_EVENT()) must be the same in all the
LTTNG_UST_TRACEPOINT_EVENT() macros of TEMPLATE.

Here’s an example:

LTTNG_UST_TRACEPOINT_EVENT(
// Tracepoint provider name
my_provider,

// Tracepoint/event name
my_event,

// Tracepoint arguments (input)
LTTNG_UST_TP_ARGS(char *, text),

// Tracepoint/event fields (output)
LTTNG_UST_TP_FIELDS(
lttng_ust_field_string(message, text)
)
)

OPTIONS

       -o, --output=FILE
           Do not generate default files: generate FILE.

           The extension of FILE determines what is generated, amongst .h, .c, and .o. This option can be used
           more than one time to generate different file types.

       -v, --verbose
           Increase verbosity.

       -h, --help
           Show command help.

ENVIRONMENT VARIABLES

       CC
           C compiler to use. Default: cc, then gcc if cc is not found. This option is only relevant when
           generating the .o file.

       CFLAGS
           Flags and options passed directly to the compiler ($CC). This option is only relevant when generating
           the .o file.

EXIT STATUS

       0
           Success

       Non-zero
           Error

BUGS

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

RESOURCES

       •   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

COPYRIGHTS

       lttng-gen-tp is part of the LTTng-UST project.

       lttng-gen-tp is distributed under the GNU General Public License, version 2
       <http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html>. See the for more details.

AUTHOR

       lttng-gen-tp was originally written by Yannick Brosseau <mailto:yannick.brosseau@gmail.com>. It is
       currently maintained by Mathieu Desnoyers <mailto:mathieu.desnoyers@efficios.com>.