aboutsummaryrefslogtreecommitdiffstats
path: root/tools/perf/builtin-trace.c
diff options
context:
space:
mode:
Diffstat (limited to 'tools/perf/builtin-trace.c')
-rw-r--r--tools/perf/builtin-trace.c734
1 files changed, 0 insertions, 734 deletions
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
deleted file mode 100644
index 40a6a2992d15..000000000000
--- a/tools/perf/builtin-trace.c
+++ /dev/null
@@ -1,734 +0,0 @@
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/util.h"
14
15static char const *script_name;
16static char const *generate_script_lang;
17static bool debug_mode;
18static u64 last_timestamp;
19static u64 nr_unordered;
20
21static int default_start_script(const char *script __unused,
22 int argc __unused,
23 const char **argv __unused)
24{
25 return 0;
26}
27
28static int default_stop_script(void)
29{
30 return 0;
31}
32
33static int default_generate_script(const char *outfile __unused)
34{
35 return 0;
36}
37
38static struct scripting_ops default_scripting_ops = {
39 .start_script = default_start_script,
40 .stop_script = default_stop_script,
41 .process_event = print_event,
42 .generate_script = default_generate_script,
43};
44
45static struct scripting_ops *scripting_ops;
46
47static void setup_scripting(void)
48{
49 /* make sure PERF_EXEC_PATH is set for scripts */
50 perf_set_argv_exec_path(perf_exec_path());
51
52 setup_perl_scripting();
53 setup_python_scripting();
54
55 scripting_ops = &default_scripting_ops;
56}
57
58static int cleanup_scripting(void)
59{
60 pr_debug("\nperf trace script stopped\n");
61
62 return scripting_ops->stop_script();
63}
64
65static char const *input_name = "perf.data";
66
67static int process_sample_event(event_t *event, struct perf_session *session)
68{
69 struct sample_data data;
70 struct thread *thread;
71
72 memset(&data, 0, sizeof(data));
73 data.time = -1;
74 data.cpu = -1;
75 data.period = 1;
76
77 event__parse_sample(event, session->sample_type, &data);
78
79 dump_printf("(IP, %d): %d/%d: %#Lx period: %Ld\n", event->header.misc,
80 data.pid, data.tid, data.ip, data.period);
81
82 thread = perf_session__findnew(session, event->ip.pid);
83 if (thread == NULL) {
84 pr_debug("problem processing %d event, skipping it.\n",
85 event->header.type);
86 return -1;
87 }
88
89 if (session->sample_type & PERF_SAMPLE_RAW) {
90 if (debug_mode) {
91 if (data.time < last_timestamp) {
92 pr_err("Samples misordered, previous: %llu "
93 "this: %llu\n", last_timestamp,
94 data.time);
95 nr_unordered++;
96 }
97 last_timestamp = data.time;
98 return 0;
99 }
100 /*
101 * FIXME: better resolve from pid from the struct trace_entry
102 * field, although it should be the same than this perf
103 * event pid
104 */
105 scripting_ops->process_event(data.cpu, data.raw_data,
106 data.raw_size,
107 data.time, thread->comm);
108 }
109
110 session->hists.stats.total_period += data.period;
111 return 0;
112}
113
114static u64 nr_lost;
115
116static int process_lost_event(event_t *event, struct perf_session *session __used)
117{
118 nr_lost += event->lost.lost;
119
120 return 0;
121}
122
123static struct perf_event_ops event_ops = {
124 .sample = process_sample_event,
125 .comm = event__process_comm,
126 .attr = event__process_attr,
127 .event_type = event__process_event_type,
128 .tracing_data = event__process_tracing_data,
129 .build_id = event__process_build_id,
130 .lost = process_lost_event,
131 .ordered_samples = true,
132};
133
134extern volatile int session_done;
135
136static void sig_handler(int sig __unused)
137{
138 session_done = 1;
139}
140
141static int __cmd_trace(struct perf_session *session)
142{
143 int ret;
144
145 signal(SIGINT, sig_handler);
146
147 ret = perf_session__process_events(session, &event_ops);
148
149 if (debug_mode) {
150 pr_err("Misordered timestamps: %llu\n", nr_unordered);
151 pr_err("Lost events: %llu\n", nr_lost);
152 }
153
154 return ret;
155}
156
157struct script_spec {
158 struct list_head node;
159 struct scripting_ops *ops;
160 char spec[0];
161};
162
163LIST_HEAD(script_specs);
164
165static struct script_spec *script_spec__new(const char *spec,
166 struct scripting_ops *ops)
167{
168 struct script_spec *s = malloc(sizeof(*s) + strlen(spec) + 1);
169
170 if (s != NULL) {
171 strcpy(s->spec, spec);
172 s->ops = ops;
173 }
174
175 return s;
176}
177
178static void script_spec__delete(struct script_spec *s)
179{
180 free(s->spec);
181 free(s);
182}
183
184static void script_spec__add(struct script_spec *s)
185{
186 list_add_tail(&s->node, &script_specs);
187}
188
189static struct script_spec *script_spec__find(const char *spec)
190{
191 struct script_spec *s;
192
193 list_for_each_entry(s, &script_specs, node)
194 if (strcasecmp(s->spec, spec) == 0)
195 return s;
196 return NULL;
197}
198
199static struct script_spec *script_spec__findnew(const char *spec,
200 struct scripting_ops *ops)
201{
202 struct script_spec *s = script_spec__find(spec);
203
204 if (s)
205 return s;
206
207 s = script_spec__new(spec, ops);
208 if (!s)
209 goto out_delete_spec;
210
211 script_spec__add(s);
212
213 return s;
214
215out_delete_spec:
216 script_spec__delete(s);
217
218 return NULL;
219}
220
221int script_spec_register(const char *spec, struct scripting_ops *ops)
222{
223 struct script_spec *s;
224
225 s = script_spec__find(spec);
226 if (s)
227 return -1;
228
229 s = script_spec__findnew(spec, ops);
230 if (!s)
231 return -1;
232
233 return 0;
234}
235
236static struct scripting_ops *script_spec__lookup(const char *spec)
237{
238 struct script_spec *s = script_spec__find(spec);
239 if (!s)
240 return NULL;
241
242 return s->ops;
243}
244
245static void list_available_languages(void)
246{
247 struct script_spec *s;
248
249 fprintf(stderr, "\n");
250 fprintf(stderr, "Scripting language extensions (used in "
251 "perf trace -s [spec:]script.[spec]):\n\n");
252
253 list_for_each_entry(s, &script_specs, node)
254 fprintf(stderr, " %-42s [%s]\n", s->spec, s->ops->name);
255
256 fprintf(stderr, "\n");
257}
258
259static int parse_scriptname(const struct option *opt __used,
260 const char *str, int unset __used)
261{
262 char spec[PATH_MAX];
263 const char *script, *ext;
264 int len;
265
266 if (strcmp(str, "lang") == 0) {
267 list_available_languages();
268 exit(0);
269 }
270
271 script = strchr(str, ':');
272 if (script) {
273 len = script - str;
274 if (len >= PATH_MAX) {
275 fprintf(stderr, "invalid language specifier");
276 return -1;
277 }
278 strncpy(spec, str, len);
279 spec[len] = '\0';
280 scripting_ops = script_spec__lookup(spec);
281 if (!scripting_ops) {
282 fprintf(stderr, "invalid language specifier");
283 return -1;
284 }
285 script++;
286 } else {
287 script = str;
288 ext = strchr(script, '.');
289 if (!ext) {
290 fprintf(stderr, "invalid script extension");
291 return -1;
292 }
293 scripting_ops = script_spec__lookup(++ext);
294 if (!scripting_ops) {
295 fprintf(stderr, "invalid script extension");
296 return -1;
297 }
298 }
299
300 script_name = strdup(script);
301
302 return 0;
303}
304
305#define for_each_lang(scripts_dir, lang_dirent, lang_next) \
306 while (!readdir_r(scripts_dir, &lang_dirent, &lang_next) && \
307 lang_next) \
308 if (lang_dirent.d_type == DT_DIR && \
309 (strcmp(lang_dirent.d_name, ".")) && \
310 (strcmp(lang_dirent.d_name, "..")))
311
312#define for_each_script(lang_dir, script_dirent, script_next) \
313 while (!readdir_r(lang_dir, &script_dirent, &script_next) && \
314 script_next) \
315 if (script_dirent.d_type != DT_DIR)
316
317
318#define RECORD_SUFFIX "-record"
319#define REPORT_SUFFIX "-report"
320
321struct script_desc {
322 struct list_head node;
323 char *name;
324 char *half_liner;
325 char *args;
326};
327
328LIST_HEAD(script_descs);
329
330static struct script_desc *script_desc__new(const char *name)
331{
332 struct script_desc *s = zalloc(sizeof(*s));
333
334 if (s != NULL)
335 s->name = strdup(name);
336
337 return s;
338}
339
340static void script_desc__delete(struct script_desc *s)
341{
342 free(s->name);
343 free(s);
344}
345
346static void script_desc__add(struct script_desc *s)
347{
348 list_add_tail(&s->node, &script_descs);
349}
350
351static struct script_desc *script_desc__find(const char *name)
352{
353 struct script_desc *s;
354
355 list_for_each_entry(s, &script_descs, node)
356 if (strcasecmp(s->name, name) == 0)
357 return s;
358 return NULL;
359}
360
361static struct script_desc *script_desc__findnew(const char *name)
362{
363 struct script_desc *s = script_desc__find(name);
364
365 if (s)
366 return s;
367
368 s = script_desc__new(name);
369 if (!s)
370 goto out_delete_desc;
371
372 script_desc__add(s);
373
374 return s;
375
376out_delete_desc:
377 script_desc__delete(s);
378
379 return NULL;
380}
381
382static char *ends_with(char *str, const char *suffix)
383{
384 size_t suffix_len = strlen(suffix);
385 char *p = str;
386
387 if (strlen(str) > suffix_len) {
388 p = str + strlen(str) - suffix_len;
389 if (!strncmp(p, suffix, suffix_len))
390 return p;
391 }
392
393 return NULL;
394}
395
396static char *ltrim(char *str)
397{
398 int len = strlen(str);
399
400 while (len && isspace(*str)) {
401 len--;
402 str++;
403 }
404
405 return str;
406}
407
408static int read_script_info(struct script_desc *desc, const char *filename)
409{
410 char line[BUFSIZ], *p;
411 FILE *fp;
412
413 fp = fopen(filename, "r");
414 if (!fp)
415 return -1;
416
417 while (fgets(line, sizeof(line), fp)) {
418 p = ltrim(line);
419 if (strlen(p) == 0)
420 continue;
421 if (*p != '#')
422 continue;
423 p++;
424 if (strlen(p) && *p == '!')
425 continue;
426
427 p = ltrim(p);
428 if (strlen(p) && p[strlen(p) - 1] == '\n')
429 p[strlen(p) - 1] = '\0';
430
431 if (!strncmp(p, "description:", strlen("description:"))) {
432 p += strlen("description:");
433 desc->half_liner = strdup(ltrim(p));
434 continue;
435 }
436
437 if (!strncmp(p, "args:", strlen("args:"))) {
438 p += strlen("args:");
439 desc->args = strdup(ltrim(p));
440 continue;
441 }
442 }
443
444 fclose(fp);
445
446 return 0;
447}
448
449static int list_available_scripts(const struct option *opt __used,
450 const char *s __used, int unset __used)
451{
452 struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
453 char scripts_path[MAXPATHLEN];
454 DIR *scripts_dir, *lang_dir;
455 char script_path[MAXPATHLEN];
456 char lang_path[MAXPATHLEN];
457 struct script_desc *desc;
458 char first_half[BUFSIZ];
459 char *script_root;
460 char *str;
461
462 snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
463
464 scripts_dir = opendir(scripts_path);
465 if (!scripts_dir)
466 return -1;
467
468 for_each_lang(scripts_dir, lang_dirent, lang_next) {
469 snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
470 lang_dirent.d_name);
471 lang_dir = opendir(lang_path);
472 if (!lang_dir)
473 continue;
474
475 for_each_script(lang_dir, script_dirent, script_next) {
476 script_root = strdup(script_dirent.d_name);
477 str = ends_with(script_root, REPORT_SUFFIX);
478 if (str) {
479 *str = '\0';
480 desc = script_desc__findnew(script_root);
481 snprintf(script_path, MAXPATHLEN, "%s/%s",
482 lang_path, script_dirent.d_name);
483 read_script_info(desc, script_path);
484 }
485 free(script_root);
486 }
487 }
488
489 fprintf(stdout, "List of available trace scripts:\n");
490 list_for_each_entry(desc, &script_descs, node) {
491 sprintf(first_half, "%s %s", desc->name,
492 desc->args ? desc->args : "");
493 fprintf(stdout, " %-36s %s\n", first_half,
494 desc->half_liner ? desc->half_liner : "");
495 }
496
497 exit(0);
498}
499
500static char *get_script_path(const char *script_root, const char *suffix)
501{
502 struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
503 char scripts_path[MAXPATHLEN];
504 char script_path[MAXPATHLEN];
505 DIR *scripts_dir, *lang_dir;
506 char lang_path[MAXPATHLEN];
507 char *str, *__script_root;
508 char *path = NULL;
509
510 snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
511
512 scripts_dir = opendir(scripts_path);
513 if (!scripts_dir)
514 return NULL;
515
516 for_each_lang(scripts_dir, lang_dirent, lang_next) {
517 snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
518 lang_dirent.d_name);
519 lang_dir = opendir(lang_path);
520 if (!lang_dir)
521 continue;
522
523 for_each_script(lang_dir, script_dirent, script_next) {
524 __script_root = strdup(script_dirent.d_name);
525 str = ends_with(__script_root, suffix);
526 if (str) {
527 *str = '\0';
528 if (strcmp(__script_root, script_root))
529 continue;
530 snprintf(script_path, MAXPATHLEN, "%s/%s",
531 lang_path, script_dirent.d_name);
532 path = strdup(script_path);
533 free(__script_root);
534 break;
535 }
536 free(__script_root);
537 }
538 }
539
540 return path;
541}
542
543static const char * const trace_usage[] = {
544 "perf trace [<options>] <command>",
545 NULL
546};
547
548static const struct option options[] = {
549 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
550 "dump raw trace in ASCII"),
551 OPT_INCR('v', "verbose", &verbose,
552 "be more verbose (show symbol address, etc)"),
553 OPT_BOOLEAN('L', "Latency", &latency_format,
554 "show latency attributes (irqs/preemption disabled, etc)"),
555 OPT_CALLBACK_NOOPT('l', "list", NULL, NULL, "list available scripts",
556 list_available_scripts),
557 OPT_CALLBACK('s', "script", NULL, "name",
558 "script file name (lang:script name, script name, or *)",
559 parse_scriptname),
560 OPT_STRING('g', "gen-script", &generate_script_lang, "lang",
561 "generate perf-trace.xx script in specified language"),
562 OPT_STRING('i', "input", &input_name, "file",
563 "input file name"),
564 OPT_BOOLEAN('d', "debug-mode", &debug_mode,
565 "do various checks like samples ordering and lost events"),
566
567 OPT_END()
568};
569
570int cmd_trace(int argc, const char **argv, const char *prefix __used)
571{
572 struct perf_session *session;
573 const char *suffix = NULL;
574 const char **__argv;
575 char *script_path;
576 int i, err;
577
578 if (argc >= 2 && strncmp(argv[1], "rec", strlen("rec")) == 0) {
579 if (argc < 3) {
580 fprintf(stderr,
581 "Please specify a record script\n");
582 return -1;
583 }
584 suffix = RECORD_SUFFIX;
585 }
586
587 if (argc >= 2 && strncmp(argv[1], "rep", strlen("rep")) == 0) {
588 if (argc < 3) {
589 fprintf(stderr,
590 "Please specify a report script\n");
591 return -1;
592 }
593 suffix = REPORT_SUFFIX;
594 }
595
596 if (!suffix && argc >= 2 && strncmp(argv[1], "-", strlen("-")) != 0) {
597 char *record_script_path, *report_script_path;
598 int live_pipe[2];
599 pid_t pid;
600
601 record_script_path = get_script_path(argv[1], RECORD_SUFFIX);
602 if (!record_script_path) {
603 fprintf(stderr, "record script not found\n");
604 return -1;
605 }
606
607 report_script_path = get_script_path(argv[1], REPORT_SUFFIX);
608 if (!report_script_path) {
609 fprintf(stderr, "report script not found\n");
610 return -1;
611 }
612
613 if (pipe(live_pipe) < 0) {
614 perror("failed to create pipe");
615 exit(-1);
616 }
617
618 pid = fork();
619 if (pid < 0) {
620 perror("failed to fork");
621 exit(-1);
622 }
623
624 if (!pid) {
625 dup2(live_pipe[1], 1);
626 close(live_pipe[0]);
627
628 __argv = malloc(5 * sizeof(const char *));
629 __argv[0] = "/bin/sh";
630 __argv[1] = record_script_path;
631 __argv[2] = "-o";
632 __argv[3] = "-";
633 __argv[4] = NULL;
634
635 execvp("/bin/sh", (char **)__argv);
636 exit(-1);
637 }
638
639 dup2(live_pipe[0], 0);
640 close(live_pipe[1]);
641
642 __argv = malloc((argc + 3) * sizeof(const char *));
643 __argv[0] = "/bin/sh";
644 __argv[1] = report_script_path;
645 for (i = 2; i < argc; i++)
646 __argv[i] = argv[i];
647 __argv[i++] = "-i";
648 __argv[i++] = "-";
649 __argv[i++] = NULL;
650
651 execvp("/bin/sh", (char **)__argv);
652 exit(-1);
653 }
654
655 if (suffix) {
656 script_path = get_script_path(argv[2], suffix);
657 if (!script_path) {
658 fprintf(stderr, "script not found\n");
659 return -1;
660 }
661
662 __argv = malloc((argc + 1) * sizeof(const char *));
663 __argv[0] = "/bin/sh";
664 __argv[1] = script_path;
665 for (i = 3; i < argc; i++)
666 __argv[i - 1] = argv[i];
667 __argv[argc - 1] = NULL;
668
669 execvp("/bin/sh", (char **)__argv);
670 exit(-1);
671 }
672
673 setup_scripting();
674
675 argc = parse_options(argc, argv, options, trace_usage,
676 PARSE_OPT_STOP_AT_NON_OPTION);
677
678 if (symbol__init() < 0)
679 return -1;
680 if (!script_name)
681 setup_pager();
682
683 session = perf_session__new(input_name, O_RDONLY, 0, false);
684 if (session == NULL)
685 return -ENOMEM;
686
687 if (strcmp(input_name, "-") &&
688 !perf_session__has_traces(session, "record -R"))
689 return -EINVAL;
690
691 if (generate_script_lang) {
692 struct stat perf_stat;
693
694 int input = open(input_name, O_RDONLY);
695 if (input < 0) {
696 perror("failed to open file");
697 exit(-1);
698 }
699
700 err = fstat(input, &perf_stat);
701 if (err < 0) {
702 perror("failed to stat file");
703 exit(-1);
704 }
705
706 if (!perf_stat.st_size) {
707 fprintf(stderr, "zero-sized file, nothing to do!\n");
708 exit(0);
709 }
710
711 scripting_ops = script_spec__lookup(generate_script_lang);
712 if (!scripting_ops) {
713 fprintf(stderr, "invalid language specifier");
714 return -1;
715 }
716
717 err = scripting_ops->generate_script("perf-trace");
718 goto out;
719 }
720
721 if (script_name) {
722 err = scripting_ops->start_script(script_name, argc, argv);
723 if (err)
724 goto out;
725 pr_debug("perf trace started with script %s\n\n", script_name);
726 }
727
728 err = __cmd_trace(session);
729
730 perf_session__delete(session);
731 cleanup_scripting();
732out:
733 return err;
734}
generated by cgit v1.2.2 (git 2.25.0) at 2025-07-12 16:31:38 -0400