Linux kernel mirror (for testing)
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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * trace-event-scripting. Scripting engine common and initialization code.
4 *
5 * Copyright (C) 2009-2010 Tom Zanussi <tzanussi@gmail.com>
6 */
7
8#include <stdio.h>
9#include <stdlib.h>
10#include <string.h>
11#include <errno.h>
12
13#include "../perf.h"
14#include "debug.h"
15#include "trace-event.h"
16#include <linux/zalloc.h>
17
18struct scripting_context *scripting_context;
19
20static int flush_script_unsupported(void)
21{
22 return 0;
23}
24
25static int stop_script_unsupported(void)
26{
27 return 0;
28}
29
30static void process_event_unsupported(union perf_event *event __maybe_unused,
31 struct perf_sample *sample __maybe_unused,
32 struct perf_evsel *evsel __maybe_unused,
33 struct addr_location *al __maybe_unused)
34{
35}
36
37static void print_python_unsupported_msg(void)
38{
39 fprintf(stderr, "Python scripting not supported."
40 " Install libpython and rebuild perf to enable it.\n"
41 "For example:\n # apt-get install python-dev (ubuntu)"
42 "\n # yum install python-devel (Fedora)"
43 "\n etc.\n");
44}
45
46static int python_start_script_unsupported(const char *script __maybe_unused,
47 int argc __maybe_unused,
48 const char **argv __maybe_unused)
49{
50 print_python_unsupported_msg();
51
52 return -1;
53}
54
55static int python_generate_script_unsupported(struct tep_handle *pevent
56 __maybe_unused,
57 const char *outfile
58 __maybe_unused)
59{
60 print_python_unsupported_msg();
61
62 return -1;
63}
64
65struct scripting_ops python_scripting_unsupported_ops = {
66 .name = "Python",
67 .start_script = python_start_script_unsupported,
68 .flush_script = flush_script_unsupported,
69 .stop_script = stop_script_unsupported,
70 .process_event = process_event_unsupported,
71 .generate_script = python_generate_script_unsupported,
72};
73
74static void register_python_scripting(struct scripting_ops *scripting_ops)
75{
76 if (scripting_context == NULL)
77 scripting_context = malloc(sizeof(*scripting_context));
78
79 if (scripting_context == NULL ||
80 script_spec_register("Python", scripting_ops) ||
81 script_spec_register("py", scripting_ops)) {
82 pr_err("Error registering Python script extension: disabling it\n");
83 zfree(&scripting_context);
84 }
85}
86
87#ifndef HAVE_LIBPYTHON_SUPPORT
88void setup_python_scripting(void)
89{
90 register_python_scripting(&python_scripting_unsupported_ops);
91}
92#else
93extern struct scripting_ops python_scripting_ops;
94
95void setup_python_scripting(void)
96{
97 register_python_scripting(&python_scripting_ops);
98}
99#endif
100
101static void print_perl_unsupported_msg(void)
102{
103 fprintf(stderr, "Perl scripting not supported."
104 " Install libperl and rebuild perf to enable it.\n"
105 "For example:\n # apt-get install libperl-dev (ubuntu)"
106 "\n # yum install 'perl(ExtUtils::Embed)' (Fedora)"
107 "\n etc.\n");
108}
109
110static int perl_start_script_unsupported(const char *script __maybe_unused,
111 int argc __maybe_unused,
112 const char **argv __maybe_unused)
113{
114 print_perl_unsupported_msg();
115
116 return -1;
117}
118
119static int perl_generate_script_unsupported(struct tep_handle *pevent
120 __maybe_unused,
121 const char *outfile __maybe_unused)
122{
123 print_perl_unsupported_msg();
124
125 return -1;
126}
127
128struct scripting_ops perl_scripting_unsupported_ops = {
129 .name = "Perl",
130 .start_script = perl_start_script_unsupported,
131 .flush_script = flush_script_unsupported,
132 .stop_script = stop_script_unsupported,
133 .process_event = process_event_unsupported,
134 .generate_script = perl_generate_script_unsupported,
135};
136
137static void register_perl_scripting(struct scripting_ops *scripting_ops)
138{
139 if (scripting_context == NULL)
140 scripting_context = malloc(sizeof(*scripting_context));
141
142 if (scripting_context == NULL ||
143 script_spec_register("Perl", scripting_ops) ||
144 script_spec_register("pl", scripting_ops)) {
145 pr_err("Error registering Perl script extension: disabling it\n");
146 zfree(&scripting_context);
147 }
148}
149
150#ifndef HAVE_LIBPERL_SUPPORT
151void setup_perl_scripting(void)
152{
153 register_perl_scripting(&perl_scripting_unsupported_ops);
154}
155#else
156extern struct scripting_ops perl_scripting_ops;
157
158void setup_perl_scripting(void)
159{
160 register_perl_scripting(&perl_scripting_ops);
161}
162#endif