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 #ifdef HAVE_LIBTRACEEVENT
13 #include <traceevent/event-parse.h>
14 #endif
15
16 #include "debug.h"
17 #include "trace-event.h"
18 #include "evsel.h"
19 #include <linux/zalloc.h>
20 #include "util/sample.h"
21
22 struct scripting_context *scripting_context;
23
24 void scripting_context__update(struct scripting_context *c,
25 union perf_event *event,
26 struct perf_sample *sample,
27 struct evsel *evsel,
28 struct addr_location *al,
29 struct addr_location *addr_al)
30 {
31 c->event_data = sample->raw_data;
32 c->pevent = NULL;
33 #ifdef HAVE_LIBTRACEEVENT
34 if (evsel->tp_format)
35 c->pevent = evsel->tp_format->tep;
36 #endif
37 c->event = event;
38 c->sample = sample;
39 c->evsel = evsel;
40 c->al = al;
41 c->addr_al = addr_al;
42 }
43
44 static int flush_script_unsupported(void)
45 {
46 return 0;
47 }
48
49 static int stop_script_unsupported(void)
50 {
51 return 0;
52 }
53
54 static void process_event_unsupported(union perf_event *event __maybe_unused,
55 struct perf_sample *sample __maybe_unused,
56 struct evsel *evsel __maybe_unused,
57 struct addr_location *al __maybe_unused,
58 struct addr_location *addr_al __maybe_unused)
59 {
60 }
61
62 static void print_python_unsupported_msg(void)
63 {
64 fprintf(stderr, "Python scripting not supported."
65 " Install libpython and rebuild perf to enable it.\n"
66 "For example:\n # apt-get install python-dev (ubuntu)"
67 "\n # yum install python-devel (Fedora)"
68 "\n etc.\n");
69 }
70
71 static int python_start_script_unsupported(const char *script __maybe_unused,
72 int argc __maybe_unused,
73 const char **argv __maybe_unused,
74 struct perf_session *session __maybe_unused)
75 {
76 print_python_unsupported_msg();
77
78 return -1;
79 }
80
81 static int python_generate_script_unsupported(struct tep_handle *pevent
82 __maybe_unused,
83 const char *outfile
84 __maybe_unused)
85 {
86 print_python_unsupported_msg();
87
88 return -1;
89 }
90
91 struct scripting_ops python_scripting_unsupported_ops = {
92 .name = "Python",
93 .dirname = "python",
94 .start_script = python_start_script_unsupported,
95 .flush_script = flush_script_unsupported,
96 .stop_script = stop_script_unsupported,
97 .process_event = process_event_unsupported,
98 .generate_script = python_generate_script_unsupported,
99 };
100
101 static void register_python_scripting(struct scripting_ops *scripting_ops)
102 {
103 if (scripting_context == NULL)
104 scripting_context = malloc(sizeof(*scripting_context));
105
106 if (scripting_context == NULL ||
107 script_spec_register("Python", scripting_ops) ||
108 script_spec_register("py", scripting_ops)) {
109 pr_err("Error registering Python script extension: disabling it\n");
110 zfree(&scripting_context);
111 }
112 }
113
114 #ifndef HAVE_LIBPYTHON_SUPPORT
115 void setup_python_scripting(void)
116 {
117 register_python_scripting(&python_scripting_unsupported_ops);
118 }
119 #else
120 extern struct scripting_ops python_scripting_ops;
121
122 void setup_python_scripting(void)
123 {
124 register_python_scripting(&python_scripting_ops);
125 }
126 #endif
127
128 #ifdef HAVE_LIBTRACEEVENT
129 static void print_perl_unsupported_msg(void)
130 {
131 fprintf(stderr, "Perl scripting not supported."
132 " Install libperl and rebuild perf to enable it.\n"
133 "For example:\n # apt-get install libperl-dev (ubuntu)"
134 "\n # yum install 'perl(ExtUtils::Embed)' (Fedora)"
135 "\n etc.\n");
136 }
137
138 static int perl_start_script_unsupported(const char *script __maybe_unused,
139 int argc __maybe_unused,
140 const char **argv __maybe_unused,
141 struct perf_session *session __maybe_unused)
142 {
143 print_perl_unsupported_msg();
144
145 return -1;
146 }
147
148 static int perl_generate_script_unsupported(struct tep_handle *pevent
149 __maybe_unused,
150 const char *outfile __maybe_unused)
151 {
152 print_perl_unsupported_msg();
153
154 return -1;
155 }
156
157 struct scripting_ops perl_scripting_unsupported_ops = {
158 .name = "Perl",
159 .dirname = "perl",
160 .start_script = perl_start_script_unsupported,
161 .flush_script = flush_script_unsupported,
162 .stop_script = stop_script_unsupported,
163 .process_event = process_event_unsupported,
164 .generate_script = perl_generate_script_unsupported,
165 };
166
167 static void register_perl_scripting(struct scripting_ops *scripting_ops)
168 {
169 if (scripting_context == NULL)
170 scripting_context = malloc(sizeof(*scripting_context));
171
172 if (scripting_context == NULL ||
173 script_spec_register("Perl", scripting_ops) ||
174 script_spec_register("pl", scripting_ops)) {
175 pr_err("Error registering Perl script extension: disabling it\n");
176 zfree(&scripting_context);
177 }
178 }
179
180 #ifndef HAVE_LIBPERL_SUPPORT
181 void setup_perl_scripting(void)
182 {
183 register_perl_scripting(&perl_scripting_unsupported_ops);
184 }
185 #else
186 extern struct scripting_ops perl_scripting_ops;
187
188 void setup_perl_scripting(void)
189 {
190 register_perl_scripting(&perl_scripting_ops);
191 }
192 #endif
193 #endif
194
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