doc/man/lttng-gen-tp.1.txt

   1 lttng-gen-tp(1)
   2 ===============
   3 :object-type: program
   4
   5
   6 NAME
   7 ----
   8 lttng-gen-tp - Generate LTTng-UST tracepoint provider code
   9
  10
  11 SYNOPSIS
  12 --------
  13 [verse]
  14 *lttng-gen-tp* [option:--verbose] [option:--output='FILE'.c]
  15              [option:--output='FILE'.h] [option:--output='FILE'.o] 'TEMPLATE'
  16
  17
  18 DESCRIPTION
  19 -----------
  20 The `lttng-gen-tp` tool simplifies the generation of LTTng-UST
  21 tracepoint provider files. It takes a simple template file, 'TEMPLATE',
  22 and generates the necessary C code to use the defined tracepoints in
  23 your application. See the <<template-file-format,Template file format>>
  24 section below for more information about the format of 'TEMPLATE'.
  25
  26 Currently, `lttng-gen-tp` can generate the `.h`, `.c`, and `.o` files
  27 associated with your tracepoint provider. The generated `.h` file can be
  28 included directly in your application. You can let `lttng-gen-tp`
  29 generate the `.o` file or compile the `.c` file yourself. See
  30 man:lttng-ust(3) for more information about compiling LTTng-UST
  31 tracepoint providers.
  32
  33 By default, `lttng-gen-tp` generates the `.h`, `.c`, and `.o` files,
  34 their basename being the basename of 'TEMPLATE'. You can generate one or
  35 more specific file types with the option:--output option, repeated if
  36 needed.
  37
  38
  39 [[template-file-format]]
  40 Template file format
  41 ~~~~~~~~~~~~~~~~~~~~
  42 The template file, which usually has the `.tp` extension, contains a
  43 list of `TRACEPOINT_EVENT()` definitions and other optional definition
  44 entries, like `TRACEPOINT_LOGLEVEL()`. See man:lttng-ust(3) for
  45 the complete list of available definitions.
  46
  47 The `TRACEPOINT_EVENT()` definitions are written as you would write them
  48 in an LTTng-UST template provider header file. C comments are supported
  49 (`/* */` and `//`), as well as lines starting with `#`.
  50
  51 NOTE: The provider name (the first argument of `TRACEPOINT_EVENT()`)
  52 must be the same in all the `TRACEPOINT_EVENT()` macros of 'TEMPLATE'.
  53
  54 Here's an example:
  55
  56 ---------------------------------------
  57 TRACEPOINT_EVENT(
  58     // Tracepoint provider name
  59     my_provider,
  60
  61     // Tracepoint/event name
  62     my_event,
  63
  64     // Tracepoint arguments (input)
  65     TP_ARGS(char *, text),
  66
  67     // Tracepoint/event fields (output)
  68     TP_FIELDS(
  69         ctf_string(message, text)
  70     )
  71 )
  72 ---------------------------------------
  73
  74
  75 OPTIONS
  76 -------
  77 option:-o, option:--output='FILE'::
  78     Do not generate default files: generate 'FILE'.
  79 +
  80 The extension of 'FILE' determines what is generated, amongst `.h`,
  81 `.c`, and `.o`. This option can be used more than one time to generate
  82 different file types.
  83
  84 option:-v, option:--verbose::
  85     Increase verbosity.
  86
  87 option:-h, option:--help::
  88     Show command help.
  89
  90
  91 ENVIRONMENT VARIABLES
  92 ---------------------
  93 `CC`::
  94     C compiler to use. Default: `cc`, then `gcc` if `cc` is not found.
  95     This option is only relevant when generating the `.o` file.
  96
  97 `CFLAGS`::
  98     Flags and options passed directly to the compiler (`$CC`).
  99     This option is only relevant when generating the `.o` file.
 100
 101
 102 EXIT STATUS
 103 -----------
 104 *0*::
 105     Success
 106
 107 *Non-zero*::
 108     Error
 109
 110
 111 include::common-footer.txt[]
 112
 113
 114 COPYRIGHTS
 115 ----------
 116 `lttng-gen-tp` is part of the LTTng-UST project.
 117
 118 `lttng-gen-tp` is distributed under the
 119 http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html[GNU General
 120 Public License, version 2]. See the
 121 https://github.com/lttng/lttng-ust/blob/v{lttng_version}/COPYING[`COPYING`] file
 122 for more details.
 123
 124
 125 AUTHOR
 126 ------
 127 `lttng-gen-tp` was originally written by
 128 mailto:yannick.brosseau@gmail.com[Yannick Brosseau]. It is currently
 129 maintained by mailto:mathieu.desnoyers@efficios.com[Mathieu Desnoyers].
 130
 131
 132 SEE ALSO
 133 --------
 134 man:lttng-ust(3)