xref: /openbmc/linux/tools/perf/builtin-script.c (revision 4800cd83)
1 #include "builtin.h"
2 
3 #include "perf.h"
4 #include "util/cache.h"
5 #include "util/debug.h"
6 #include "util/exec_cmd.h"
7 #include "util/header.h"
8 #include "util/parse-options.h"
9 #include "util/session.h"
10 #include "util/symbol.h"
11 #include "util/thread.h"
12 #include "util/trace-event.h"
13 #include "util/parse-options.h"
14 #include "util/util.h"
15 
16 static char const		*script_name;
17 static char const		*generate_script_lang;
18 static bool			debug_mode;
19 static u64			last_timestamp;
20 static u64			nr_unordered;
21 extern const struct option	record_options[];
22 
23 static int default_start_script(const char *script __unused,
24 				int argc __unused,
25 				const char **argv __unused)
26 {
27 	return 0;
28 }
29 
30 static int default_stop_script(void)
31 {
32 	return 0;
33 }
34 
35 static int default_generate_script(const char *outfile __unused)
36 {
37 	return 0;
38 }
39 
40 static struct scripting_ops default_scripting_ops = {
41 	.start_script		= default_start_script,
42 	.stop_script		= default_stop_script,
43 	.process_event		= print_event,
44 	.generate_script	= default_generate_script,
45 };
46 
47 static struct scripting_ops	*scripting_ops;
48 
49 static void setup_scripting(void)
50 {
51 	setup_perl_scripting();
52 	setup_python_scripting();
53 
54 	scripting_ops = &default_scripting_ops;
55 }
56 
57 static int cleanup_scripting(void)
58 {
59 	pr_debug("\nperf script stopped\n");
60 
61 	return scripting_ops->stop_script();
62 }
63 
64 static char const		*input_name = "perf.data";
65 
66 static int process_sample_event(event_t *event, struct sample_data *sample,
67 				struct perf_session *session)
68 {
69 	struct thread *thread = perf_session__findnew(session, event->ip.pid);
70 
71 	if (thread == NULL) {
72 		pr_debug("problem processing %d event, skipping it.\n",
73 			 event->header.type);
74 		return -1;
75 	}
76 
77 	if (session->sample_type & PERF_SAMPLE_RAW) {
78 		if (debug_mode) {
79 			if (sample->time < last_timestamp) {
80 				pr_err("Samples misordered, previous: %" PRIu64
81 					" this: %" PRIu64 "\n", last_timestamp,
82 					sample->time);
83 				nr_unordered++;
84 			}
85 			last_timestamp = sample->time;
86 			return 0;
87 		}
88 		/*
89 		 * FIXME: better resolve from pid from the struct trace_entry
90 		 * field, although it should be the same than this perf
91 		 * event pid
92 		 */
93 		scripting_ops->process_event(sample->cpu, sample->raw_data,
94 					     sample->raw_size,
95 					     sample->time, thread->comm);
96 	}
97 
98 	session->hists.stats.total_period += sample->period;
99 	return 0;
100 }
101 
102 static struct perf_event_ops event_ops = {
103 	.sample	= process_sample_event,
104 	.comm	= event__process_comm,
105 	.attr	= event__process_attr,
106 	.event_type = event__process_event_type,
107 	.tracing_data = event__process_tracing_data,
108 	.build_id = event__process_build_id,
109 	.ordering_requires_timestamps = true,
110 	.ordered_samples = true,
111 };
112 
113 extern volatile int session_done;
114 
115 static void sig_handler(int sig __unused)
116 {
117 	session_done = 1;
118 }
119 
120 static int __cmd_script(struct perf_session *session)
121 {
122 	int ret;
123 
124 	signal(SIGINT, sig_handler);
125 
126 	ret = perf_session__process_events(session, &event_ops);
127 
128 	if (debug_mode)
129 		pr_err("Misordered timestamps: %" PRIu64 "\n", nr_unordered);
130 
131 	return ret;
132 }
133 
134 struct script_spec {
135 	struct list_head	node;
136 	struct scripting_ops	*ops;
137 	char			spec[0];
138 };
139 
140 static LIST_HEAD(script_specs);
141 
142 static struct script_spec *script_spec__new(const char *spec,
143 					    struct scripting_ops *ops)
144 {
145 	struct script_spec *s = malloc(sizeof(*s) + strlen(spec) + 1);
146 
147 	if (s != NULL) {
148 		strcpy(s->spec, spec);
149 		s->ops = ops;
150 	}
151 
152 	return s;
153 }
154 
155 static void script_spec__delete(struct script_spec *s)
156 {
157 	free(s->spec);
158 	free(s);
159 }
160 
161 static void script_spec__add(struct script_spec *s)
162 {
163 	list_add_tail(&s->node, &script_specs);
164 }
165 
166 static struct script_spec *script_spec__find(const char *spec)
167 {
168 	struct script_spec *s;
169 
170 	list_for_each_entry(s, &script_specs, node)
171 		if (strcasecmp(s->spec, spec) == 0)
172 			return s;
173 	return NULL;
174 }
175 
176 static struct script_spec *script_spec__findnew(const char *spec,
177 						struct scripting_ops *ops)
178 {
179 	struct script_spec *s = script_spec__find(spec);
180 
181 	if (s)
182 		return s;
183 
184 	s = script_spec__new(spec, ops);
185 	if (!s)
186 		goto out_delete_spec;
187 
188 	script_spec__add(s);
189 
190 	return s;
191 
192 out_delete_spec:
193 	script_spec__delete(s);
194 
195 	return NULL;
196 }
197 
198 int script_spec_register(const char *spec, struct scripting_ops *ops)
199 {
200 	struct script_spec *s;
201 
202 	s = script_spec__find(spec);
203 	if (s)
204 		return -1;
205 
206 	s = script_spec__findnew(spec, ops);
207 	if (!s)
208 		return -1;
209 
210 	return 0;
211 }
212 
213 static struct scripting_ops *script_spec__lookup(const char *spec)
214 {
215 	struct script_spec *s = script_spec__find(spec);
216 	if (!s)
217 		return NULL;
218 
219 	return s->ops;
220 }
221 
222 static void list_available_languages(void)
223 {
224 	struct script_spec *s;
225 
226 	fprintf(stderr, "\n");
227 	fprintf(stderr, "Scripting language extensions (used in "
228 		"perf script -s [spec:]script.[spec]):\n\n");
229 
230 	list_for_each_entry(s, &script_specs, node)
231 		fprintf(stderr, "  %-42s [%s]\n", s->spec, s->ops->name);
232 
233 	fprintf(stderr, "\n");
234 }
235 
236 static int parse_scriptname(const struct option *opt __used,
237 			    const char *str, int unset __used)
238 {
239 	char spec[PATH_MAX];
240 	const char *script, *ext;
241 	int len;
242 
243 	if (strcmp(str, "lang") == 0) {
244 		list_available_languages();
245 		exit(0);
246 	}
247 
248 	script = strchr(str, ':');
249 	if (script) {
250 		len = script - str;
251 		if (len >= PATH_MAX) {
252 			fprintf(stderr, "invalid language specifier");
253 			return -1;
254 		}
255 		strncpy(spec, str, len);
256 		spec[len] = '\0';
257 		scripting_ops = script_spec__lookup(spec);
258 		if (!scripting_ops) {
259 			fprintf(stderr, "invalid language specifier");
260 			return -1;
261 		}
262 		script++;
263 	} else {
264 		script = str;
265 		ext = strrchr(script, '.');
266 		if (!ext) {
267 			fprintf(stderr, "invalid script extension");
268 			return -1;
269 		}
270 		scripting_ops = script_spec__lookup(++ext);
271 		if (!scripting_ops) {
272 			fprintf(stderr, "invalid script extension");
273 			return -1;
274 		}
275 	}
276 
277 	script_name = strdup(script);
278 
279 	return 0;
280 }
281 
282 /* Helper function for filesystems that return a dent->d_type DT_UNKNOWN */
283 static int is_directory(const char *base_path, const struct dirent *dent)
284 {
285 	char path[PATH_MAX];
286 	struct stat st;
287 
288 	sprintf(path, "%s/%s", base_path, dent->d_name);
289 	if (stat(path, &st))
290 		return 0;
291 
292 	return S_ISDIR(st.st_mode);
293 }
294 
295 #define for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next)\
296 	while (!readdir_r(scripts_dir, &lang_dirent, &lang_next) &&	\
297 	       lang_next)						\
298 		if ((lang_dirent.d_type == DT_DIR ||			\
299 		     (lang_dirent.d_type == DT_UNKNOWN &&		\
300 		      is_directory(scripts_path, &lang_dirent))) &&	\
301 		    (strcmp(lang_dirent.d_name, ".")) &&		\
302 		    (strcmp(lang_dirent.d_name, "..")))
303 
304 #define for_each_script(lang_path, lang_dir, script_dirent, script_next)\
305 	while (!readdir_r(lang_dir, &script_dirent, &script_next) &&	\
306 	       script_next)						\
307 		if (script_dirent.d_type != DT_DIR &&			\
308 		    (script_dirent.d_type != DT_UNKNOWN ||		\
309 		     !is_directory(lang_path, &script_dirent)))
310 
311 
312 #define RECORD_SUFFIX			"-record"
313 #define REPORT_SUFFIX			"-report"
314 
315 struct script_desc {
316 	struct list_head	node;
317 	char			*name;
318 	char			*half_liner;
319 	char			*args;
320 };
321 
322 static LIST_HEAD(script_descs);
323 
324 static struct script_desc *script_desc__new(const char *name)
325 {
326 	struct script_desc *s = zalloc(sizeof(*s));
327 
328 	if (s != NULL && name)
329 		s->name = strdup(name);
330 
331 	return s;
332 }
333 
334 static void script_desc__delete(struct script_desc *s)
335 {
336 	free(s->name);
337 	free(s->half_liner);
338 	free(s->args);
339 	free(s);
340 }
341 
342 static void script_desc__add(struct script_desc *s)
343 {
344 	list_add_tail(&s->node, &script_descs);
345 }
346 
347 static struct script_desc *script_desc__find(const char *name)
348 {
349 	struct script_desc *s;
350 
351 	list_for_each_entry(s, &script_descs, node)
352 		if (strcasecmp(s->name, name) == 0)
353 			return s;
354 	return NULL;
355 }
356 
357 static struct script_desc *script_desc__findnew(const char *name)
358 {
359 	struct script_desc *s = script_desc__find(name);
360 
361 	if (s)
362 		return s;
363 
364 	s = script_desc__new(name);
365 	if (!s)
366 		goto out_delete_desc;
367 
368 	script_desc__add(s);
369 
370 	return s;
371 
372 out_delete_desc:
373 	script_desc__delete(s);
374 
375 	return NULL;
376 }
377 
378 static const char *ends_with(const char *str, const char *suffix)
379 {
380 	size_t suffix_len = strlen(suffix);
381 	const char *p = str;
382 
383 	if (strlen(str) > suffix_len) {
384 		p = str + strlen(str) - suffix_len;
385 		if (!strncmp(p, suffix, suffix_len))
386 			return p;
387 	}
388 
389 	return NULL;
390 }
391 
392 static char *ltrim(char *str)
393 {
394 	int len = strlen(str);
395 
396 	while (len && isspace(*str)) {
397 		len--;
398 		str++;
399 	}
400 
401 	return str;
402 }
403 
404 static int read_script_info(struct script_desc *desc, const char *filename)
405 {
406 	char line[BUFSIZ], *p;
407 	FILE *fp;
408 
409 	fp = fopen(filename, "r");
410 	if (!fp)
411 		return -1;
412 
413 	while (fgets(line, sizeof(line), fp)) {
414 		p = ltrim(line);
415 		if (strlen(p) == 0)
416 			continue;
417 		if (*p != '#')
418 			continue;
419 		p++;
420 		if (strlen(p) && *p == '!')
421 			continue;
422 
423 		p = ltrim(p);
424 		if (strlen(p) && p[strlen(p) - 1] == '\n')
425 			p[strlen(p) - 1] = '\0';
426 
427 		if (!strncmp(p, "description:", strlen("description:"))) {
428 			p += strlen("description:");
429 			desc->half_liner = strdup(ltrim(p));
430 			continue;
431 		}
432 
433 		if (!strncmp(p, "args:", strlen("args:"))) {
434 			p += strlen("args:");
435 			desc->args = strdup(ltrim(p));
436 			continue;
437 		}
438 	}
439 
440 	fclose(fp);
441 
442 	return 0;
443 }
444 
445 static int list_available_scripts(const struct option *opt __used,
446 				  const char *s __used, int unset __used)
447 {
448 	struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
449 	char scripts_path[MAXPATHLEN];
450 	DIR *scripts_dir, *lang_dir;
451 	char script_path[MAXPATHLEN];
452 	char lang_path[MAXPATHLEN];
453 	struct script_desc *desc;
454 	char first_half[BUFSIZ];
455 	char *script_root;
456 	char *str;
457 
458 	snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
459 
460 	scripts_dir = opendir(scripts_path);
461 	if (!scripts_dir)
462 		return -1;
463 
464 	for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
465 		snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
466 			 lang_dirent.d_name);
467 		lang_dir = opendir(lang_path);
468 		if (!lang_dir)
469 			continue;
470 
471 		for_each_script(lang_path, lang_dir, script_dirent, script_next) {
472 			script_root = strdup(script_dirent.d_name);
473 			str = (char *)ends_with(script_root, REPORT_SUFFIX);
474 			if (str) {
475 				*str = '\0';
476 				desc = script_desc__findnew(script_root);
477 				snprintf(script_path, MAXPATHLEN, "%s/%s",
478 					 lang_path, script_dirent.d_name);
479 				read_script_info(desc, script_path);
480 			}
481 			free(script_root);
482 		}
483 	}
484 
485 	fprintf(stdout, "List of available trace scripts:\n");
486 	list_for_each_entry(desc, &script_descs, node) {
487 		sprintf(first_half, "%s %s", desc->name,
488 			desc->args ? desc->args : "");
489 		fprintf(stdout, "  %-36s %s\n", first_half,
490 			desc->half_liner ? desc->half_liner : "");
491 	}
492 
493 	exit(0);
494 }
495 
496 static char *get_script_path(const char *script_root, const char *suffix)
497 {
498 	struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
499 	char scripts_path[MAXPATHLEN];
500 	char script_path[MAXPATHLEN];
501 	DIR *scripts_dir, *lang_dir;
502 	char lang_path[MAXPATHLEN];
503 	char *str, *__script_root;
504 	char *path = NULL;
505 
506 	snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
507 
508 	scripts_dir = opendir(scripts_path);
509 	if (!scripts_dir)
510 		return NULL;
511 
512 	for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
513 		snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
514 			 lang_dirent.d_name);
515 		lang_dir = opendir(lang_path);
516 		if (!lang_dir)
517 			continue;
518 
519 		for_each_script(lang_path, lang_dir, script_dirent, script_next) {
520 			__script_root = strdup(script_dirent.d_name);
521 			str = (char *)ends_with(__script_root, suffix);
522 			if (str) {
523 				*str = '\0';
524 				if (strcmp(__script_root, script_root))
525 					continue;
526 				snprintf(script_path, MAXPATHLEN, "%s/%s",
527 					 lang_path, script_dirent.d_name);
528 				path = strdup(script_path);
529 				free(__script_root);
530 				break;
531 			}
532 			free(__script_root);
533 		}
534 	}
535 
536 	return path;
537 }
538 
539 static bool is_top_script(const char *script_path)
540 {
541 	return ends_with(script_path, "top") == NULL ? false : true;
542 }
543 
544 static int has_required_arg(char *script_path)
545 {
546 	struct script_desc *desc;
547 	int n_args = 0;
548 	char *p;
549 
550 	desc = script_desc__new(NULL);
551 
552 	if (read_script_info(desc, script_path))
553 		goto out;
554 
555 	if (!desc->args)
556 		goto out;
557 
558 	for (p = desc->args; *p; p++)
559 		if (*p == '<')
560 			n_args++;
561 out:
562 	script_desc__delete(desc);
563 
564 	return n_args;
565 }
566 
567 static const char * const script_usage[] = {
568 	"perf script [<options>]",
569 	"perf script [<options>] record <script> [<record-options>] <command>",
570 	"perf script [<options>] report <script> [script-args]",
571 	"perf script [<options>] <script> [<record-options>] <command>",
572 	"perf script [<options>] <top-script> [script-args]",
573 	NULL
574 };
575 
576 static const struct option options[] = {
577 	OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
578 		    "dump raw trace in ASCII"),
579 	OPT_INCR('v', "verbose", &verbose,
580 		    "be more verbose (show symbol address, etc)"),
581 	OPT_BOOLEAN('L', "Latency", &latency_format,
582 		    "show latency attributes (irqs/preemption disabled, etc)"),
583 	OPT_CALLBACK_NOOPT('l', "list", NULL, NULL, "list available scripts",
584 			   list_available_scripts),
585 	OPT_CALLBACK('s', "script", NULL, "name",
586 		     "script file name (lang:script name, script name, or *)",
587 		     parse_scriptname),
588 	OPT_STRING('g', "gen-script", &generate_script_lang, "lang",
589 		   "generate perf-script.xx script in specified language"),
590 	OPT_STRING('i', "input", &input_name, "file",
591 		    "input file name"),
592 	OPT_BOOLEAN('d', "debug-mode", &debug_mode,
593 		   "do various checks like samples ordering and lost events"),
594 
595 	OPT_END()
596 };
597 
598 static bool have_cmd(int argc, const char **argv)
599 {
600 	char **__argv = malloc(sizeof(const char *) * argc);
601 
602 	if (!__argv)
603 		die("malloc");
604 	memcpy(__argv, argv, sizeof(const char *) * argc);
605 	argc = parse_options(argc, (const char **)__argv, record_options,
606 			     NULL, PARSE_OPT_STOP_AT_NON_OPTION);
607 	free(__argv);
608 
609 	return argc != 0;
610 }
611 
612 int cmd_script(int argc, const char **argv, const char *prefix __used)
613 {
614 	char *rec_script_path = NULL;
615 	char *rep_script_path = NULL;
616 	struct perf_session *session;
617 	char *script_path = NULL;
618 	const char **__argv;
619 	bool system_wide;
620 	int i, j, err;
621 
622 	setup_scripting();
623 
624 	argc = parse_options(argc, argv, options, script_usage,
625 			     PARSE_OPT_STOP_AT_NON_OPTION);
626 
627 	if (argc > 1 && !strncmp(argv[0], "rec", strlen("rec"))) {
628 		rec_script_path = get_script_path(argv[1], RECORD_SUFFIX);
629 		if (!rec_script_path)
630 			return cmd_record(argc, argv, NULL);
631 	}
632 
633 	if (argc > 1 && !strncmp(argv[0], "rep", strlen("rep"))) {
634 		rep_script_path = get_script_path(argv[1], REPORT_SUFFIX);
635 		if (!rep_script_path) {
636 			fprintf(stderr,
637 				"Please specify a valid report script"
638 				"(see 'perf script -l' for listing)\n");
639 			return -1;
640 		}
641 	}
642 
643 	/* make sure PERF_EXEC_PATH is set for scripts */
644 	perf_set_argv_exec_path(perf_exec_path());
645 
646 	if (argc && !script_name && !rec_script_path && !rep_script_path) {
647 		int live_pipe[2];
648 		int rep_args;
649 		pid_t pid;
650 
651 		rec_script_path = get_script_path(argv[0], RECORD_SUFFIX);
652 		rep_script_path = get_script_path(argv[0], REPORT_SUFFIX);
653 
654 		if (!rec_script_path && !rep_script_path) {
655 			fprintf(stderr, " Couldn't find script %s\n\n See perf"
656 				" script -l for available scripts.\n", argv[0]);
657 			usage_with_options(script_usage, options);
658 		}
659 
660 		if (is_top_script(argv[0])) {
661 			rep_args = argc - 1;
662 		} else {
663 			int rec_args;
664 
665 			rep_args = has_required_arg(rep_script_path);
666 			rec_args = (argc - 1) - rep_args;
667 			if (rec_args < 0) {
668 				fprintf(stderr, " %s script requires options."
669 					"\n\n See perf script -l for available "
670 					"scripts and options.\n", argv[0]);
671 				usage_with_options(script_usage, options);
672 			}
673 		}
674 
675 		if (pipe(live_pipe) < 0) {
676 			perror("failed to create pipe");
677 			exit(-1);
678 		}
679 
680 		pid = fork();
681 		if (pid < 0) {
682 			perror("failed to fork");
683 			exit(-1);
684 		}
685 
686 		if (!pid) {
687 			system_wide = true;
688 			j = 0;
689 
690 			dup2(live_pipe[1], 1);
691 			close(live_pipe[0]);
692 
693 			if (!is_top_script(argv[0]))
694 				system_wide = !have_cmd(argc - rep_args,
695 							&argv[rep_args]);
696 
697 			__argv = malloc((argc + 6) * sizeof(const char *));
698 			if (!__argv)
699 				die("malloc");
700 
701 			__argv[j++] = "/bin/sh";
702 			__argv[j++] = rec_script_path;
703 			if (system_wide)
704 				__argv[j++] = "-a";
705 			__argv[j++] = "-q";
706 			__argv[j++] = "-o";
707 			__argv[j++] = "-";
708 			for (i = rep_args + 1; i < argc; i++)
709 				__argv[j++] = argv[i];
710 			__argv[j++] = NULL;
711 
712 			execvp("/bin/sh", (char **)__argv);
713 			free(__argv);
714 			exit(-1);
715 		}
716 
717 		dup2(live_pipe[0], 0);
718 		close(live_pipe[1]);
719 
720 		__argv = malloc((argc + 4) * sizeof(const char *));
721 		if (!__argv)
722 			die("malloc");
723 		j = 0;
724 		__argv[j++] = "/bin/sh";
725 		__argv[j++] = rep_script_path;
726 		for (i = 1; i < rep_args + 1; i++)
727 			__argv[j++] = argv[i];
728 		__argv[j++] = "-i";
729 		__argv[j++] = "-";
730 		__argv[j++] = NULL;
731 
732 		execvp("/bin/sh", (char **)__argv);
733 		free(__argv);
734 		exit(-1);
735 	}
736 
737 	if (rec_script_path)
738 		script_path = rec_script_path;
739 	if (rep_script_path)
740 		script_path = rep_script_path;
741 
742 	if (script_path) {
743 		system_wide = false;
744 		j = 0;
745 
746 		if (rec_script_path)
747 			system_wide = !have_cmd(argc - 1, &argv[1]);
748 
749 		__argv = malloc((argc + 2) * sizeof(const char *));
750 		if (!__argv)
751 			die("malloc");
752 		__argv[j++] = "/bin/sh";
753 		__argv[j++] = script_path;
754 		if (system_wide)
755 			__argv[j++] = "-a";
756 		for (i = 2; i < argc; i++)
757 			__argv[j++] = argv[i];
758 		__argv[j++] = NULL;
759 
760 		execvp("/bin/sh", (char **)__argv);
761 		free(__argv);
762 		exit(-1);
763 	}
764 
765 	if (symbol__init() < 0)
766 		return -1;
767 	if (!script_name)
768 		setup_pager();
769 
770 	session = perf_session__new(input_name, O_RDONLY, 0, false, &event_ops);
771 	if (session == NULL)
772 		return -ENOMEM;
773 
774 	if (strcmp(input_name, "-") &&
775 	    !perf_session__has_traces(session, "record -R"))
776 		return -EINVAL;
777 
778 	if (generate_script_lang) {
779 		struct stat perf_stat;
780 
781 		int input = open(input_name, O_RDONLY);
782 		if (input < 0) {
783 			perror("failed to open file");
784 			exit(-1);
785 		}
786 
787 		err = fstat(input, &perf_stat);
788 		if (err < 0) {
789 			perror("failed to stat file");
790 			exit(-1);
791 		}
792 
793 		if (!perf_stat.st_size) {
794 			fprintf(stderr, "zero-sized file, nothing to do!\n");
795 			exit(0);
796 		}
797 
798 		scripting_ops = script_spec__lookup(generate_script_lang);
799 		if (!scripting_ops) {
800 			fprintf(stderr, "invalid language specifier");
801 			return -1;
802 		}
803 
804 		err = scripting_ops->generate_script("perf-script");
805 		goto out;
806 	}
807 
808 	if (script_name) {
809 		err = scripting_ops->start_script(script_name, argc, argv);
810 		if (err)
811 			goto out;
812 		pr_debug("perf script started with script %s\n\n", script_name);
813 	}
814 
815 	err = __cmd_script(session);
816 
817 	perf_session__delete(session);
818 	cleanup_scripting();
819 out:
820 	return err;
821 }
822