LTTNG-GEN-TP(1) LTTng Manual LTTNG-GEN-TP(1)
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>.
SEE ALSO
lttng-ust(3)
LTTng 2.13.5 09/30/2022 LTTNG-GEN-TP(1)
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