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-rw-r--r--tools/perf/util/trace-event-scripting.c193
1 files changed, 193 insertions, 0 deletions
diff --git a/tools/perf/util/trace-event-scripting.c b/tools/perf/util/trace-event-scripting.c
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+++ b/tools/perf/util/trace-event-scripting.c
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * trace-event-scripting. Scripting engine common and initialization code.
+ *
+ * Copyright (C) 2009-2010 Tom Zanussi <tzanussi@gmail.com>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#ifdef HAVE_LIBTRACEEVENT
+#include <traceevent/event-parse.h>
+#endif
+
+#include "debug.h"
+#include "trace-event.h"
+#include "evsel.h"
+#include <linux/zalloc.h>
+#include "util/sample.h"
+
+struct scripting_context *scripting_context;
+
+void scripting_context__update(struct scripting_context *c,
+ union perf_event *event,
+ struct perf_sample *sample,
+ struct evsel *evsel,
+ struct addr_location *al,
+ struct addr_location *addr_al)
+{
+ c->event_data = sample->raw_data;
+ c->pevent = NULL;
+#ifdef HAVE_LIBTRACEEVENT
+ if (evsel->tp_format)
+ c->pevent = evsel->tp_format->tep;
+#endif
+ c->event = event;
+ c->sample = sample;
+ c->evsel = evsel;
+ c->al = al;
+ c->addr_al = addr_al;
+}
+
+static int flush_script_unsupported(void)
+{
+ return 0;
+}
+
+static int stop_script_unsupported(void)
+{
+ return 0;
+}
+
+static void process_event_unsupported(union perf_event *event __maybe_unused,
+ struct perf_sample *sample __maybe_unused,
+ struct evsel *evsel __maybe_unused,
+ struct addr_location *al __maybe_unused,
+ struct addr_location *addr_al __maybe_unused)
+{
+}
+
+static void print_python_unsupported_msg(void)
+{
+ fprintf(stderr, "Python scripting not supported."
+ " Install libpython and rebuild perf to enable it.\n"
+ "For example:\n # apt-get install python-dev (ubuntu)"
+ "\n # yum install python-devel (Fedora)"
+ "\n etc.\n");
+}
+
+static int python_start_script_unsupported(const char *script __maybe_unused,
+ int argc __maybe_unused,
+ const char **argv __maybe_unused,
+ struct perf_session *session __maybe_unused)
+{
+ print_python_unsupported_msg();
+
+ return -1;
+}
+
+static int python_generate_script_unsupported(struct tep_handle *pevent
+ __maybe_unused,
+ const char *outfile
+ __maybe_unused)
+{
+ print_python_unsupported_msg();
+
+ return -1;
+}
+
+struct scripting_ops python_scripting_unsupported_ops = {
+ .name = "Python",
+ .dirname = "python",
+ .start_script = python_start_script_unsupported,
+ .flush_script = flush_script_unsupported,
+ .stop_script = stop_script_unsupported,
+ .process_event = process_event_unsupported,
+ .generate_script = python_generate_script_unsupported,
+};
+
+static void register_python_scripting(struct scripting_ops *scripting_ops)
+{
+ if (scripting_context == NULL)
+ scripting_context = malloc(sizeof(*scripting_context));
+
+ if (scripting_context == NULL ||
+ script_spec_register("Python", scripting_ops) ||
+ script_spec_register("py", scripting_ops)) {
+ pr_err("Error registering Python script extension: disabling it\n");
+ zfree(&scripting_context);
+ }
+}
+
+#ifndef HAVE_LIBPYTHON_SUPPORT
+void setup_python_scripting(void)
+{
+ register_python_scripting(&python_scripting_unsupported_ops);
+}
+#else
+extern struct scripting_ops python_scripting_ops;
+
+void setup_python_scripting(void)
+{
+ register_python_scripting(&python_scripting_ops);
+}
+#endif
+
+#ifdef HAVE_LIBTRACEEVENT
+static void print_perl_unsupported_msg(void)
+{
+ fprintf(stderr, "Perl scripting not supported."
+ " Install libperl and rebuild perf to enable it.\n"
+ "For example:\n # apt-get install libperl-dev (ubuntu)"
+ "\n # yum install 'perl(ExtUtils::Embed)' (Fedora)"
+ "\n etc.\n");
+}
+
+static int perl_start_script_unsupported(const char *script __maybe_unused,
+ int argc __maybe_unused,
+ const char **argv __maybe_unused,
+ struct perf_session *session __maybe_unused)
+{
+ print_perl_unsupported_msg();
+
+ return -1;
+}
+
+static int perl_generate_script_unsupported(struct tep_handle *pevent
+ __maybe_unused,
+ const char *outfile __maybe_unused)
+{
+ print_perl_unsupported_msg();
+
+ return -1;
+}
+
+struct scripting_ops perl_scripting_unsupported_ops = {
+ .name = "Perl",
+ .dirname = "perl",
+ .start_script = perl_start_script_unsupported,
+ .flush_script = flush_script_unsupported,
+ .stop_script = stop_script_unsupported,
+ .process_event = process_event_unsupported,
+ .generate_script = perl_generate_script_unsupported,
+};
+
+static void register_perl_scripting(struct scripting_ops *scripting_ops)
+{
+ if (scripting_context == NULL)
+ scripting_context = malloc(sizeof(*scripting_context));
+
+ if (scripting_context == NULL ||
+ script_spec_register("Perl", scripting_ops) ||
+ script_spec_register("pl", scripting_ops)) {
+ pr_err("Error registering Perl script extension: disabling it\n");
+ zfree(&scripting_context);
+ }
+}
+
+#ifndef HAVE_LIBPERL_SUPPORT
+void setup_perl_scripting(void)
+{
+ register_perl_scripting(&perl_scripting_unsupported_ops);
+}
+#else
+extern struct scripting_ops perl_scripting_ops;
+
+void setup_perl_scripting(void)
+{
+ register_perl_scripting(&perl_scripting_ops);
+}
+#endif
+#endif