lttng-gen-tp(1)

1LTTNG-GEN-TP(1)                  LTTng Manual                  LTTNG-GEN-TP(1)
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NAME

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

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

13       The lttng-gen-tp tool simplifies the generation of LTTng-UST tracepoint
14       provider files. It takes a simple template file, TEMPLATE, and
15       generates the necessary C code to use the defined tracepoints in your
16       application. See the Template file format section below for more
17       information about the format of TEMPLATE.
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19       Currently, lttng-gen-tp can generate the .h, .c, and .o files
20       associated with your tracepoint provider. The generated .h file can be
21       included directly in your application. You can let lttng-gen-tp
22       generate the .o file or compile the .c file yourself. See lttng-ust(3)
23       for more information about compiling LTTng-UST tracepoint providers.
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25       By default, lttng-gen-tp generates the .h, .c, and .o files, their
26       basename being the basename of TEMPLATE. You can generate one or more
27       specific file types with the --output option, repeated if needed.
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29   Template file format
30       The template file, which usually has the .tp extension, contains a list
31       of TRACEPOINT_EVENT() definitions and other optional definition
32       entries, like TRACEPOINT_LOGLEVEL(). See lttng-ust(3) for the complete
33       list of available definitions.
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35       The TRACEPOINT_EVENT() definitions are written as you would write them
36       in an LTTng-UST template provider header file. C comments are supported
37       (/* */ and //), as well as lines starting with #.
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39           Note
40           The provider name (the first argument of TRACEPOINT_EVENT()) must
41           be the same in all the TRACEPOINT_EVENT() macros of TEMPLATE.
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43       Here’s an example:
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45           TRACEPOINT_EVENT(
46               // Tracepoint provider name
47               my_provider,
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49               // Tracepoint/event name
50               my_event,
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52               // Tracepoint arguments (input)
53               TP_ARGS(char *, text),
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55               // Tracepoint/event fields (output)
56               TP_FIELDS(
57                   ctf_string(message, text)
58               )
59           )
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OPTIONS

62       -o, --output=FILE
63           Do not generate default files: generate FILE.
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65           The extension of FILE determines what is generated, amongst .h, .c,
66           and .o. This option can be used more than one time to generate
67           different file types.
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69       -v, --verbose
70           Increase verbosity.
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72       -h, --help
73           Show command help.
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ENVIRONMENT VARIABLES

76       CC
77           C compiler to use. Default: cc, then gcc if cc is not found. This
78           option is only relevant when generating the .o file.
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80       CFLAGS
81           Flags and options passed directly to the compiler ($CC). This
82           option is only relevant when generating the .o file.
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EXIT STATUS

85       0
86           Success
87
88       Non-zero
89           Error
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BUGS

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

96       ·   LTTng project website <http://lttng.org>
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98       ·   LTTng documentation <http://lttng.org/docs>
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100       ·   Git repositories <http://git.lttng.org>
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102       ·   GitHub organization <http://github.com/lttng>
103
104       ·   Continuous integration <http://ci.lttng.org/>
105
106       ·   Mailing list <http://lists.lttng.org> for support and development:
107           lttng-dev@lists.lttng.org
108
109       ·   IRC channel <irc://irc.oftc.net/lttng>: #lttng on irc.oftc.net
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COPYRIGHTS

112       lttng-gen-tp is part of the LTTng-UST project.
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114       lttng-gen-tp is distributed under the GNU General Public License,
115       version 2 <http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html>.
116       See the COPYING <https://github.com/lttng/lttng-
117       ust/blob/v2.12.0-rc3/COPYING> file for more details.
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AUTHOR

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