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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#include <traceevent/event-parse.h>
13
14#include "debug.h"
15#include "trace-event.h"
16#include "evsel.h"
17#include <linux/zalloc.h>
18#include "util/sample.h"
19
20struct scripting_context *scripting_context;
21
22void scripting_context__update(struct scripting_context *c,
23 union perf_event *event,
24 struct perf_sample *sample,
25 struct evsel *evsel,
26 struct addr_location *al,
27 struct addr_location *addr_al)
28{
29 c->event_data = sample->raw_data;
30 if (evsel->tp_format)
31 c->pevent = evsel->tp_format->tep;
32 else
33 c->pevent = NULL;
34 c->event = event;
35 c->sample = sample;
36 c->evsel = evsel;
37 c->al = al;
38 c->addr_al = addr_al;
39}
40
41static int flush_script_unsupported(void)
42{
43 return 0;
44}
45
46static int stop_script_unsupported(void)
47{
48 return 0;
49}
50
51static void process_event_unsupported(union perf_event *event __maybe_unused,
52 struct perf_sample *sample __maybe_unused,
53 struct evsel *evsel __maybe_unused,
54 struct addr_location *al __maybe_unused,
55 struct addr_location *addr_al __maybe_unused)
56{
57}
58
59static void print_python_unsupported_msg(void)
60{
61 fprintf(stderr, "Python scripting not supported."
62 " Install libpython and rebuild perf to enable it.\n"
63 "For example:\n # apt-get install python-dev (ubuntu)"
64 "\n # yum install python-devel (Fedora)"
65 "\n etc.\n");
66}
67
68static int python_start_script_unsupported(const char *script __maybe_unused,
69 int argc __maybe_unused,
70 const char **argv __maybe_unused,
71 struct perf_session *session __maybe_unused)
72{
73 print_python_unsupported_msg();
74
75 return -1;
76}
77
78static int python_generate_script_unsupported(struct tep_handle *pevent
79 __maybe_unused,
80 const char *outfile
81 __maybe_unused)
82{
83 print_python_unsupported_msg();
84
85 return -1;
86}
87
88struct scripting_ops python_scripting_unsupported_ops = {
89 .name = "Python",
90 .dirname = "python",
91 .start_script = python_start_script_unsupported,
92 .flush_script = flush_script_unsupported,
93 .stop_script = stop_script_unsupported,
94 .process_event = process_event_unsupported,
95 .generate_script = python_generate_script_unsupported,
96};
97
98static void register_python_scripting(struct scripting_ops *scripting_ops)
99{
100 if (scripting_context == NULL)
101 scripting_context = malloc(sizeof(*scripting_context));
102
103 if (scripting_context == NULL ||
104 script_spec_register("Python", scripting_ops) ||
105 script_spec_register("py", scripting_ops)) {
106 pr_err("Error registering Python script extension: disabling it\n");
107 zfree(&scripting_context);
108 }
109}
110
111#ifndef HAVE_LIBPYTHON_SUPPORT
112void setup_python_scripting(void)
113{
114 register_python_scripting(&python_scripting_unsupported_ops);
115}
116#else
117extern struct scripting_ops python_scripting_ops;
118
119void setup_python_scripting(void)
120{
121 register_python_scripting(&python_scripting_ops);
122}
123#endif
124
125static void print_perl_unsupported_msg(void)
126{
127 fprintf(stderr, "Perl scripting not supported."
128 " Install libperl and rebuild perf to enable it.\n"
129 "For example:\n # apt-get install libperl-dev (ubuntu)"
130 "\n # yum install 'perl(ExtUtils::Embed)' (Fedora)"
131 "\n etc.\n");
132}
133
134static int perl_start_script_unsupported(const char *script __maybe_unused,
135 int argc __maybe_unused,
136 const char **argv __maybe_unused,
137 struct perf_session *session __maybe_unused)
138{
139 print_perl_unsupported_msg();
140
141 return -1;
142}
143
144static int perl_generate_script_unsupported(struct tep_handle *pevent
145 __maybe_unused,
146 const char *outfile __maybe_unused)
147{
148 print_perl_unsupported_msg();
149
150 return -1;
151}
152
153struct scripting_ops perl_scripting_unsupported_ops = {
154 .name = "Perl",
155 .dirname = "perl",
156 .start_script = perl_start_script_unsupported,
157 .flush_script = flush_script_unsupported,
158 .stop_script = stop_script_unsupported,
159 .process_event = process_event_unsupported,
160 .generate_script = perl_generate_script_unsupported,
161};
162
163static void register_perl_scripting(struct scripting_ops *scripting_ops)
164{
165 if (scripting_context == NULL)
166 scripting_context = malloc(sizeof(*scripting_context));
167
168 if (scripting_context == NULL ||
169 script_spec_register("Perl", scripting_ops) ||
170 script_spec_register("pl", scripting_ops)) {
171 pr_err("Error registering Perl script extension: disabling it\n");
172 zfree(&scripting_context);
173 }
174}
175
176#ifndef HAVE_LIBPERL_SUPPORT
177void setup_perl_scripting(void)
178{
179 register_perl_scripting(&perl_scripting_unsupported_ops);
180}
181#else
182extern struct scripting_ops perl_scripting_ops;
183
184void setup_perl_scripting(void)
185{
186 register_perl_scripting(&perl_scripting_ops);
187}
188#endif