kernel/tools/perf/util/trace-event-scripting.c

   1 /*
   2  * trace-event-scripting.  Scripting engine common and initialization code.
   3  *
   4  * Copyright (C) 2009-2010 Tom Zanussi <tzanussi@gmail.com>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <errno.h>
  26
  27 #include "../perf.h"
  28 #include "util.h"
  29 #include "trace-event.h"
  30
  31 struct scripting_context *scripting_context;
  32
  33 static int flush_script_unsupported(void)
  34 {
  35         return 0;
  36 }
  37
  38 static int stop_script_unsupported(void)
  39 {
  40         return 0;
  41 }
  42
  43 static void process_event_unsupported(union perf_event *event __maybe_unused,
  44                                       struct perf_sample *sample __maybe_unused,
  45                                       struct perf_evsel *evsel __maybe_unused,
  46                                       struct addr_location *al __maybe_unused)
  47 {
  48 }
  49
  50 static void print_python_unsupported_msg(void)
  51 {
  52         fprintf(stderr, "Python scripting not supported."
  53                 "  Install libpython and rebuild perf to enable it.\n"
  54                 "For example:\n  # apt-get install python-dev (ubuntu)"
  55                 "\n  # yum install python-devel (Fedora)"
  56                 "\n  etc.\n");
  57 }
  58
  59 static int python_start_script_unsupported(const char *script __maybe_unused,
  60                                            int argc __maybe_unused,
  61                                            const char **argv __maybe_unused)
  62 {
  63         print_python_unsupported_msg();
  64
  65         return -1;
  66 }
  67
  68 static int python_generate_script_unsupported(struct pevent *pevent
  69                                               __maybe_unused,
  70                                               const char *outfile
  71                                               __maybe_unused)
  72 {
  73         print_python_unsupported_msg();
  74
  75         return -1;
  76 }
  77
  78 struct scripting_ops python_scripting_unsupported_ops = {
  79         .name = "Python",
  80         .start_script = python_start_script_unsupported,
  81         .flush_script = flush_script_unsupported,
  82         .stop_script = stop_script_unsupported,
  83         .process_event = process_event_unsupported,
  84         .generate_script = python_generate_script_unsupported,
  85 };
  86
  87 static void register_python_scripting(struct scripting_ops *scripting_ops)
  88 {
  89         int err;
  90         err = script_spec_register("Python", scripting_ops);
  91         if (err)
  92                 die("error registering Python script extension");
  93
  94         err = script_spec_register("py", scripting_ops);
  95         if (err)
  96                 die("error registering py script extension");
  97
  98         scripting_context = malloc(sizeof(struct scripting_context));
  99 }
 100
 101 #ifdef NO_LIBPYTHON
 102 void setup_python_scripting(void)
 103 {
 104         register_python_scripting(&python_scripting_unsupported_ops);
 105 }
 106 #else
 107 extern struct scripting_ops python_scripting_ops;
 108
 109 void setup_python_scripting(void)
 110 {
 111         register_python_scripting(&python_scripting_ops);
 112 }
 113 #endif
 114
 115 static void print_perl_unsupported_msg(void)
 116 {
 117         fprintf(stderr, "Perl scripting not supported."
 118                 "  Install libperl and rebuild perf to enable it.\n"
 119                 "For example:\n  # apt-get install libperl-dev (ubuntu)"
 120                 "\n  # yum install 'perl(ExtUtils::Embed)' (Fedora)"
 121                 "\n  etc.\n");
 122 }
 123
 124 static int perl_start_script_unsupported(const char *script __maybe_unused,
 125                                          int argc __maybe_unused,
 126                                          const char **argv __maybe_unused)
 127 {
 128         print_perl_unsupported_msg();
 129
 130         return -1;
 131 }
 132
 133 static int perl_generate_script_unsupported(struct pevent *pevent
 134                                             __maybe_unused,
 135                                             const char *outfile __maybe_unused)
 136 {
 137         print_perl_unsupported_msg();
 138
 139         return -1;
 140 }
 141
 142 struct scripting_ops perl_scripting_unsupported_ops = {
 143         .name = "Perl",
 144         .start_script = perl_start_script_unsupported,
 145         .flush_script = flush_script_unsupported,
 146         .stop_script = stop_script_unsupported,
 147         .process_event = process_event_unsupported,
 148         .generate_script = perl_generate_script_unsupported,
 149 };
 150
 151 static void register_perl_scripting(struct scripting_ops *scripting_ops)
 152 {
 153         int err;
 154         err = script_spec_register("Perl", scripting_ops);
 155         if (err)
 156                 die("error registering Perl script extension");
 157
 158         err = script_spec_register("pl", scripting_ops);
 159         if (err)
 160                 die("error registering pl script extension");
 161
 162         scripting_context = malloc(sizeof(struct scripting_context));
 163 }
 164
 165 #ifdef NO_LIBPERL
 166 void setup_perl_scripting(void)
 167 {
 168         register_perl_scripting(&perl_scripting_unsupported_ops);
 169 }
 170 #else
 171 extern struct scripting_ops perl_scripting_ops;
 172
 173 void setup_perl_scripting(void)
 174 {
 175         register_perl_scripting(&perl_scripting_ops);
 176 }
 177 #endif