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 "debug.h"
  29 #include "util.h"
  30 #include "trace-event.h"
  31
  32 struct scripting_context *scripting_context;
  33
  34 static int flush_script_unsupported(void)
  35 {
  36         return 0;
  37 }
  38
  39 static int stop_script_unsupported(void)
  40 {
  41         return 0;
  42 }
  43
  44 static void process_event_unsupported(union perf_event *event __maybe_unused,
  45                                       struct perf_sample *sample __maybe_unused,
  46                                       struct perf_evsel *evsel __maybe_unused,
  47                                       struct addr_location *al __maybe_unused)
  48 {
  49 }
  50
  51 static void print_python_unsupported_msg(void)
  52 {
  53         fprintf(stderr, "Python scripting not supported."
  54                 "  Install libpython and rebuild perf to enable it.\n"
  55                 "For example:\n  # apt-get install python-dev (ubuntu)"
  56                 "\n  # yum install python-devel (Fedora)"
  57                 "\n  etc.\n");
  58 }
  59
  60 static int python_start_script_unsupported(const char *script __maybe_unused,
  61                                            int argc __maybe_unused,
  62                                            const char **argv __maybe_unused)
  63 {
  64         print_python_unsupported_msg();
  65
  66         return -1;
  67 }
  68
  69 static int python_generate_script_unsupported(struct pevent *pevent
  70                                               __maybe_unused,
  71                                               const char *outfile
  72                                               __maybe_unused)
  73 {
  74         print_python_unsupported_msg();
  75
  76         return -1;
  77 }
  78
  79 struct scripting_ops python_scripting_unsupported_ops = {
  80         .name = "Python",
  81         .start_script = python_start_script_unsupported,
  82         .flush_script = flush_script_unsupported,
  83         .stop_script = stop_script_unsupported,
  84         .process_event = process_event_unsupported,
  85         .generate_script = python_generate_script_unsupported,
  86 };
  87
  88 static void register_python_scripting(struct scripting_ops *scripting_ops)
  89 {
  90         if (scripting_context == NULL)
  91                 scripting_context = malloc(sizeof(*scripting_context));
  92
  93        if (scripting_context == NULL ||
  94            script_spec_register("Python", scripting_ops) ||
  95            script_spec_register("py", scripting_ops)) {
  96                 pr_err("Error registering Python script extension: disabling it\n");
  97                 zfree(&scripting_context);
  98         }
  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         if (scripting_context == NULL)
 154                 scripting_context = malloc(sizeof(*scripting_context));
 155
 156        if (scripting_context == NULL ||
 157            script_spec_register("Perl", scripting_ops) ||
 158            script_spec_register("pl", scripting_ops)) {
 159                 pr_err("Error registering Perl script extension: disabling it\n");
 160                 zfree(&scripting_context);
 161         }
 162 }
 163
 164 #ifdef NO_LIBPERL
 165 void setup_perl_scripting(void)
 166 {
 167         register_perl_scripting(&perl_scripting_unsupported_ops);
 168 }
 169 #else
 170 extern struct scripting_ops perl_scripting_ops;
 171
 172 void setup_perl_scripting(void)
 173 {
 174         register_perl_scripting(&perl_scripting_ops);
 175 }
 176 #endif