Linux Perf
trace-event-scripting.c
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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 
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 
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 {
65 
66  return -1;
67 }
68 
70  __maybe_unused,
71  const char *outfile
72  __maybe_unused)
73 {
75 
76  return -1;
77 }
78 
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 
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 #ifndef HAVE_LIBPYTHON_SUPPORT
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 {
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 {
138 
139  return -1;
140 }
141 
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 
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 #ifndef HAVE_LIBPERL_SUPPORT
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
static int python_start_script_unsupported(const char *script __maybe_unused, int argc __maybe_unused, const char **argv __maybe_unused)
static int perl_start_script_unsupported(const char *script __maybe_unused, int argc __maybe_unused, const char **argv __maybe_unused)
struct scripting_context * scripting_context
static int stop_script_unsupported(void)
#define pr_err(fmt,...)
Definition: json.h:21
void setup_python_scripting(void)
static int flush_script_unsupported(void)
void * malloc(YYSIZE_T)
void setup_perl_scripting(void)
const char * name
Definition: trace-event.h:75
static int perl_generate_script_unsupported(struct pevent *pevent __maybe_unused, const char *outfile __maybe_unused)
static void print_perl_unsupported_msg(void)
#define event
static void register_perl_scripting(struct scripting_ops *scripting_ops)
static void print_python_unsupported_msg(void)
static void register_python_scripting(struct scripting_ops *scripting_ops)
static void process_event_unsupported(union perf_event *event __maybe_unused, struct perf_sample *sample __maybe_unused, struct perf_evsel *evsel __maybe_unused, struct addr_location *al __maybe_unused)
#define zfree(ptr)
Definition: util.h:25
struct pevent * pevent
Definition: trace-event.h:97
int script_spec_register(const char *spec, struct scripting_ops *ops)
struct scripting_ops perl_scripting_unsupported_ops
struct scripting_ops python_scripting_unsupported_ops
static int python_generate_script_unsupported(struct pevent *pevent __maybe_unused, const char *outfile __maybe_unused)