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
 22struct scripting_context *scripting_context;
 23
 24void 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
 44static int flush_script_unsupported(void)
 45{
 46	return 0;
 47}
 48
 49static int stop_script_unsupported(void)
 50{
 51	return 0;
 52}
 53
 54static 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
 62static 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
 71static 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
 81static 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
 91struct 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
101static 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
115void setup_python_scripting(void)
116{
117	register_python_scripting(&python_scripting_unsupported_ops);
118}
119#else
120extern struct scripting_ops python_scripting_ops;
121
122void setup_python_scripting(void)
123{
124	register_python_scripting(&python_scripting_ops);
125}
126#endif
127
128#ifdef HAVE_LIBTRACEEVENT
129static 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
138static 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
148static 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
157struct 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
167static 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
181void setup_perl_scripting(void)
182{
183	register_perl_scripting(&perl_scripting_unsupported_ops);
184}
185#else
186extern struct scripting_ops perl_scripting_ops;
187
188void setup_perl_scripting(void)
189{
190	register_perl_scripting(&perl_scripting_ops);
191}
192#endif
193#endif