lttng-gen-tp [--verbose] [--output=FILE.c]
[--output=FILE.h] [--output=FILE.o] TEMPLATE
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.
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 #.
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)
)
)
-o, --output=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
-h, --help
CC
CFLAGS
0
Non-zero
If you encounter any issue or usability problem, please report it on the LTTng bug tracker <https://bugs.lttng.org/projects/lttng-ust>.
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.
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>.
lttng-ust(3)