9e371965c0346517505ed059f9b9f0e5c1ebeb0c
[linux-2.6.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(int cpu __unused,
40                                       void *data __unused,
41                                       int size __unused,
42                                       unsigned long long nsecs __unused,
43                                       char *comm __unused)
44 {
45 }
46
47 static void print_perl_unsupported_msg(void)
48 {
49         fprintf(stderr, "Perl scripting not supported."
50                 "  Install libperl and rebuild perf to enable it.\n"
51                 "For example:\n  # apt-get install libperl-dev (ubuntu)"
52                 "\n  # yum install 'perl(ExtUtils::Embed)' (Fedora)"
53                 "\n  etc.\n");
54 }
55
56 static int perl_start_script_unsupported(const char *script __unused,
57                                          int argc __unused,
58                                          const char **argv __unused)
59 {
60         print_perl_unsupported_msg();
61
62         return -1;
63 }
64
65 static int perl_generate_script_unsupported(const char *outfile __unused)
66 {
67         print_perl_unsupported_msg();
68
69         return -1;
70 }
71
72 struct scripting_ops perl_scripting_unsupported_ops = {
73         .name = "Perl",
74         .start_script = perl_start_script_unsupported,
75         .stop_script = stop_script_unsupported,
76         .process_event = process_event_unsupported,
77         .generate_script = perl_generate_script_unsupported,
78 };
79
80 static void register_perl_scripting(struct scripting_ops *scripting_ops)
81 {
82         int err;
83         err = script_spec_register("Perl", scripting_ops);
84         if (err)
85                 die("error registering Perl script extension");
86
87         err = script_spec_register("pl", scripting_ops);
88         if (err)
89                 die("error registering pl script extension");
90
91         scripting_context = malloc(sizeof(struct scripting_context));
92 }
93
94 #ifdef NO_LIBPERL
95 void setup_perl_scripting(void)
96 {
97         register_perl_scripting(&perl_scripting_unsupported_ops);
98 }
99 #else
100 struct scripting_ops perl_scripting_ops;
101
102 void setup_perl_scripting(void)
103 {
104         register_perl_scripting(&perl_scripting_ops);
105 }
106 #endif