perf scripting: Avoid leaking the scripting_context variable
[pandora-kernel.git] / 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 <ctype.h>
26 #include <errno.h>
27
28 #include "../perf.h"
29 #include "util.h"
30 #include "trace-event.h"
31
32 struct scripting_context *scripting_context;
33
34 static int stop_script_unsupported(void)
35 {
36         return 0;
37 }
38
39 static void process_event_unsupported(union perf_event *event __unused,
40                                       struct perf_sample *sample __unused,
41                                       struct perf_evsel *evsel __unused,
42                                       struct perf_session *session __unused,
43                                       struct thread *thread __unused)
44 {
45 }
46
47 static void print_python_unsupported_msg(void)
48 {
49         fprintf(stderr, "Python scripting not supported."
50                 "  Install libpython and rebuild perf to enable it.\n"
51                 "For example:\n  # apt-get install python-dev (ubuntu)"
52                 "\n  # yum install python-devel (Fedora)"
53                 "\n  etc.\n");
54 }
55
56 static int python_start_script_unsupported(const char *script __unused,
57                                            int argc __unused,
58                                            const char **argv __unused)
59 {
60         print_python_unsupported_msg();
61
62         return -1;
63 }
64
65 static int python_generate_script_unsupported(const char *outfile __unused)
66 {
67         print_python_unsupported_msg();
68
69         return -1;
70 }
71
72 struct scripting_ops python_scripting_unsupported_ops = {
73         .name = "Python",
74         .start_script = python_start_script_unsupported,
75         .stop_script = stop_script_unsupported,
76         .process_event = process_event_unsupported,
77         .generate_script = python_generate_script_unsupported,
78 };
79
80 static void register_python_scripting(struct scripting_ops *scripting_ops)
81 {
82         int err;
83         err = script_spec_register("Python", scripting_ops);
84         if (err)
85                 die("error registering Python script extension");
86
87         err = script_spec_register("py", scripting_ops);
88         if (err)
89                 die("error registering py script extension");
90
91         if (scripting_context == NULL)
92                 scripting_context = malloc(sizeof(*scripting_context));
93 }
94
95 #ifdef NO_LIBPYTHON
96 void setup_python_scripting(void)
97 {
98         register_python_scripting(&python_scripting_unsupported_ops);
99 }
100 #else
101 extern struct scripting_ops python_scripting_ops;
102
103 void setup_python_scripting(void)
104 {
105         register_python_scripting(&python_scripting_ops);
106 }
107 #endif
108
109 static void print_perl_unsupported_msg(void)
110 {
111         fprintf(stderr, "Perl scripting not supported."
112                 "  Install libperl and rebuild perf to enable it.\n"
113                 "For example:\n  # apt-get install libperl-dev (ubuntu)"
114                 "\n  # yum install 'perl(ExtUtils::Embed)' (Fedora)"
115                 "\n  etc.\n");
116 }
117
118 static int perl_start_script_unsupported(const char *script __unused,
119                                          int argc __unused,
120                                          const char **argv __unused)
121 {
122         print_perl_unsupported_msg();
123
124         return -1;
125 }
126
127 static int perl_generate_script_unsupported(const char *outfile __unused)
128 {
129         print_perl_unsupported_msg();
130
131         return -1;
132 }
133
134 struct scripting_ops perl_scripting_unsupported_ops = {
135         .name = "Perl",
136         .start_script = perl_start_script_unsupported,
137         .stop_script = stop_script_unsupported,
138         .process_event = process_event_unsupported,
139         .generate_script = perl_generate_script_unsupported,
140 };
141
142 static void register_perl_scripting(struct scripting_ops *scripting_ops)
143 {
144         int err;
145         err = script_spec_register("Perl", scripting_ops);
146         if (err)
147                 die("error registering Perl script extension");
148
149         err = script_spec_register("pl", scripting_ops);
150         if (err)
151                 die("error registering pl script extension");
152
153         if (scripting_context == NULL)
154                 scripting_context = malloc(sizeof(*scripting_context));
155 }
156
157 #ifdef NO_LIBPERL
158 void setup_perl_scripting(void)
159 {
160         register_perl_scripting(&perl_scripting_unsupported_ops);
161 }
162 #else
163 extern struct scripting_ops perl_scripting_ops;
164
165 void setup_perl_scripting(void)
166 {
167         register_perl_scripting(&perl_scripting_ops);
168 }
169 #endif