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Merge tag 'staging-4.15-rc1' into v4l_for_linus
[mirror_ubuntu-bionic-kernel.git] / tools / perf / util / session.c
1 #include <errno.h>
2 #include <inttypes.h>
3 #include <linux/kernel.h>
4 #include <traceevent/event-parse.h>
5 #include <api/fs/fs.h>
6
7 #include <byteswap.h>
8 #include <unistd.h>
9 #include <sys/types.h>
10 #include <sys/mman.h>
11
12 #include "evlist.h"
13 #include "evsel.h"
14 #include "memswap.h"
15 #include "session.h"
16 #include "tool.h"
17 #include "sort.h"
18 #include "util.h"
19 #include "cpumap.h"
20 #include "perf_regs.h"
21 #include "asm/bug.h"
22 #include "auxtrace.h"
23 #include "thread.h"
24 #include "thread-stack.h"
25 #include "stat.h"
26
27 static int perf_session__deliver_event(struct perf_session *session,
28 union perf_event *event,
29 struct perf_sample *sample,
30 struct perf_tool *tool,
31 u64 file_offset);
32
33 static int perf_session__open(struct perf_session *session)
34 {
35 struct perf_data_file *file = session->file;
36
37 if (perf_session__read_header(session) < 0) {
38 pr_err("incompatible file format (rerun with -v to learn more)\n");
39 return -1;
40 }
41
42 if (perf_data_file__is_pipe(file))
43 return 0;
44
45 if (perf_header__has_feat(&session->header, HEADER_STAT))
46 return 0;
47
48 if (!perf_evlist__valid_sample_type(session->evlist)) {
49 pr_err("non matching sample_type\n");
50 return -1;
51 }
52
53 if (!perf_evlist__valid_sample_id_all(session->evlist)) {
54 pr_err("non matching sample_id_all\n");
55 return -1;
56 }
57
58 if (!perf_evlist__valid_read_format(session->evlist)) {
59 pr_err("non matching read_format\n");
60 return -1;
61 }
62
63 return 0;
64 }
65
66 void perf_session__set_id_hdr_size(struct perf_session *session)
67 {
68 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
69
70 machines__set_id_hdr_size(&session->machines, id_hdr_size);
71 }
72
73 int perf_session__create_kernel_maps(struct perf_session *session)
74 {
75 int ret = machine__create_kernel_maps(&session->machines.host);
76
77 if (ret >= 0)
78 ret = machines__create_guest_kernel_maps(&session->machines);
79 return ret;
80 }
81
82 static void perf_session__destroy_kernel_maps(struct perf_session *session)
83 {
84 machines__destroy_kernel_maps(&session->machines);
85 }
86
87 static bool perf_session__has_comm_exec(struct perf_session *session)
88 {
89 struct perf_evsel *evsel;
90
91 evlist__for_each_entry(session->evlist, evsel) {
92 if (evsel->attr.comm_exec)
93 return true;
94 }
95
96 return false;
97 }
98
99 static void perf_session__set_comm_exec(struct perf_session *session)
100 {
101 bool comm_exec = perf_session__has_comm_exec(session);
102
103 machines__set_comm_exec(&session->machines, comm_exec);
104 }
105
106 static int ordered_events__deliver_event(struct ordered_events *oe,
107 struct ordered_event *event)
108 {
109 struct perf_sample sample;
110 struct perf_session *session = container_of(oe, struct perf_session,
111 ordered_events);
112 int ret = perf_evlist__parse_sample(session->evlist, event->event, &sample);
113
114 if (ret) {
115 pr_err("Can't parse sample, err = %d\n", ret);
116 return ret;
117 }
118
119 return perf_session__deliver_event(session, event->event, &sample,
120 session->tool, event->file_offset);
121 }
122
123 struct perf_session *perf_session__new(struct perf_data_file *file,
124 bool repipe, struct perf_tool *tool)
125 {
126 struct perf_session *session = zalloc(sizeof(*session));
127
128 if (!session)
129 goto out;
130
131 session->repipe = repipe;
132 session->tool = tool;
133 INIT_LIST_HEAD(&session->auxtrace_index);
134 machines__init(&session->machines);
135 ordered_events__init(&session->ordered_events, ordered_events__deliver_event);
136
137 if (file) {
138 if (perf_data_file__open(file))
139 goto out_delete;
140
141 session->file = file;
142
143 if (perf_data_file__is_read(file)) {
144 if (perf_session__open(session) < 0)
145 goto out_close;
146
147 /*
148 * set session attributes that are present in perf.data
149 * but not in pipe-mode.
150 */
151 if (!file->is_pipe) {
152 perf_session__set_id_hdr_size(session);
153 perf_session__set_comm_exec(session);
154 }
155 }
156 } else {
157 session->machines.host.env = &perf_env;
158 }
159
160 if (!file || perf_data_file__is_write(file)) {
161 /*
162 * In O_RDONLY mode this will be performed when reading the
163 * kernel MMAP event, in perf_event__process_mmap().
164 */
165 if (perf_session__create_kernel_maps(session) < 0)
166 pr_warning("Cannot read kernel map\n");
167 }
168
169 /*
170 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is
171 * processed, so perf_evlist__sample_id_all is not meaningful here.
172 */
173 if ((!file || !file->is_pipe) && tool && tool->ordering_requires_timestamps &&
174 tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) {
175 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
176 tool->ordered_events = false;
177 }
178
179 return session;
180
181 out_close:
182 perf_data_file__close(file);
183 out_delete:
184 perf_session__delete(session);
185 out:
186 return NULL;
187 }
188
189 static void perf_session__delete_threads(struct perf_session *session)
190 {
191 machine__delete_threads(&session->machines.host);
192 }
193
194 void perf_session__delete(struct perf_session *session)
195 {
196 if (session == NULL)
197 return;
198 auxtrace__free(session);
199 auxtrace_index__free(&session->auxtrace_index);
200 perf_session__destroy_kernel_maps(session);
201 perf_session__delete_threads(session);
202 perf_env__exit(&session->header.env);
203 machines__exit(&session->machines);
204 if (session->file)
205 perf_data_file__close(session->file);
206 free(session);
207 }
208
209 static int process_event_synth_tracing_data_stub(struct perf_tool *tool
210 __maybe_unused,
211 union perf_event *event
212 __maybe_unused,
213 struct perf_session *session
214 __maybe_unused)
215 {
216 dump_printf(": unhandled!\n");
217 return 0;
218 }
219
220 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
221 union perf_event *event __maybe_unused,
222 struct perf_evlist **pevlist
223 __maybe_unused)
224 {
225 dump_printf(": unhandled!\n");
226 return 0;
227 }
228
229 static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused,
230 union perf_event *event __maybe_unused,
231 struct perf_evlist **pevlist
232 __maybe_unused)
233 {
234 if (dump_trace)
235 perf_event__fprintf_event_update(event, stdout);
236
237 dump_printf(": unhandled!\n");
238 return 0;
239 }
240
241 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
242 union perf_event *event __maybe_unused,
243 struct perf_sample *sample __maybe_unused,
244 struct perf_evsel *evsel __maybe_unused,
245 struct machine *machine __maybe_unused)
246 {
247 dump_printf(": unhandled!\n");
248 return 0;
249 }
250
251 static int process_event_stub(struct perf_tool *tool __maybe_unused,
252 union perf_event *event __maybe_unused,
253 struct perf_sample *sample __maybe_unused,
254 struct machine *machine __maybe_unused)
255 {
256 dump_printf(": unhandled!\n");
257 return 0;
258 }
259
260 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
261 union perf_event *event __maybe_unused,
262 struct ordered_events *oe __maybe_unused)
263 {
264 dump_printf(": unhandled!\n");
265 return 0;
266 }
267
268 static int process_finished_round(struct perf_tool *tool,
269 union perf_event *event,
270 struct ordered_events *oe);
271
272 static int skipn(int fd, off_t n)
273 {
274 char buf[4096];
275 ssize_t ret;
276
277 while (n > 0) {
278 ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
279 if (ret <= 0)
280 return ret;
281 n -= ret;
282 }
283
284 return 0;
285 }
286
287 static s64 process_event_auxtrace_stub(struct perf_tool *tool __maybe_unused,
288 union perf_event *event,
289 struct perf_session *session
290 __maybe_unused)
291 {
292 dump_printf(": unhandled!\n");
293 if (perf_data_file__is_pipe(session->file))
294 skipn(perf_data_file__fd(session->file), event->auxtrace.size);
295 return event->auxtrace.size;
296 }
297
298 static int process_event_op2_stub(struct perf_tool *tool __maybe_unused,
299 union perf_event *event __maybe_unused,
300 struct perf_session *session __maybe_unused)
301 {
302 dump_printf(": unhandled!\n");
303 return 0;
304 }
305
306
307 static
308 int process_event_thread_map_stub(struct perf_tool *tool __maybe_unused,
309 union perf_event *event __maybe_unused,
310 struct perf_session *session __maybe_unused)
311 {
312 if (dump_trace)
313 perf_event__fprintf_thread_map(event, stdout);
314
315 dump_printf(": unhandled!\n");
316 return 0;
317 }
318
319 static
320 int process_event_cpu_map_stub(struct perf_tool *tool __maybe_unused,
321 union perf_event *event __maybe_unused,
322 struct perf_session *session __maybe_unused)
323 {
324 if (dump_trace)
325 perf_event__fprintf_cpu_map(event, stdout);
326
327 dump_printf(": unhandled!\n");
328 return 0;
329 }
330
331 static
332 int process_event_stat_config_stub(struct perf_tool *tool __maybe_unused,
333 union perf_event *event __maybe_unused,
334 struct perf_session *session __maybe_unused)
335 {
336 if (dump_trace)
337 perf_event__fprintf_stat_config(event, stdout);
338
339 dump_printf(": unhandled!\n");
340 return 0;
341 }
342
343 static int process_stat_stub(struct perf_tool *tool __maybe_unused,
344 union perf_event *event __maybe_unused,
345 struct perf_session *perf_session
346 __maybe_unused)
347 {
348 if (dump_trace)
349 perf_event__fprintf_stat(event, stdout);
350
351 dump_printf(": unhandled!\n");
352 return 0;
353 }
354
355 static int process_stat_round_stub(struct perf_tool *tool __maybe_unused,
356 union perf_event *event __maybe_unused,
357 struct perf_session *perf_session
358 __maybe_unused)
359 {
360 if (dump_trace)
361 perf_event__fprintf_stat_round(event, stdout);
362
363 dump_printf(": unhandled!\n");
364 return 0;
365 }
366
367 void perf_tool__fill_defaults(struct perf_tool *tool)
368 {
369 if (tool->sample == NULL)
370 tool->sample = process_event_sample_stub;
371 if (tool->mmap == NULL)
372 tool->mmap = process_event_stub;
373 if (tool->mmap2 == NULL)
374 tool->mmap2 = process_event_stub;
375 if (tool->comm == NULL)
376 tool->comm = process_event_stub;
377 if (tool->namespaces == NULL)
378 tool->namespaces = process_event_stub;
379 if (tool->fork == NULL)
380 tool->fork = process_event_stub;
381 if (tool->exit == NULL)
382 tool->exit = process_event_stub;
383 if (tool->lost == NULL)
384 tool->lost = perf_event__process_lost;
385 if (tool->lost_samples == NULL)
386 tool->lost_samples = perf_event__process_lost_samples;
387 if (tool->aux == NULL)
388 tool->aux = perf_event__process_aux;
389 if (tool->itrace_start == NULL)
390 tool->itrace_start = perf_event__process_itrace_start;
391 if (tool->context_switch == NULL)
392 tool->context_switch = perf_event__process_switch;
393 if (tool->read == NULL)
394 tool->read = process_event_sample_stub;
395 if (tool->throttle == NULL)
396 tool->throttle = process_event_stub;
397 if (tool->unthrottle == NULL)
398 tool->unthrottle = process_event_stub;
399 if (tool->attr == NULL)
400 tool->attr = process_event_synth_attr_stub;
401 if (tool->event_update == NULL)
402 tool->event_update = process_event_synth_event_update_stub;
403 if (tool->tracing_data == NULL)
404 tool->tracing_data = process_event_synth_tracing_data_stub;
405 if (tool->build_id == NULL)
406 tool->build_id = process_event_op2_stub;
407 if (tool->finished_round == NULL) {
408 if (tool->ordered_events)
409 tool->finished_round = process_finished_round;
410 else
411 tool->finished_round = process_finished_round_stub;
412 }
413 if (tool->id_index == NULL)
414 tool->id_index = process_event_op2_stub;
415 if (tool->auxtrace_info == NULL)
416 tool->auxtrace_info = process_event_op2_stub;
417 if (tool->auxtrace == NULL)
418 tool->auxtrace = process_event_auxtrace_stub;
419 if (tool->auxtrace_error == NULL)
420 tool->auxtrace_error = process_event_op2_stub;
421 if (tool->thread_map == NULL)
422 tool->thread_map = process_event_thread_map_stub;
423 if (tool->cpu_map == NULL)
424 tool->cpu_map = process_event_cpu_map_stub;
425 if (tool->stat_config == NULL)
426 tool->stat_config = process_event_stat_config_stub;
427 if (tool->stat == NULL)
428 tool->stat = process_stat_stub;
429 if (tool->stat_round == NULL)
430 tool->stat_round = process_stat_round_stub;
431 if (tool->time_conv == NULL)
432 tool->time_conv = process_event_op2_stub;
433 if (tool->feature == NULL)
434 tool->feature = process_event_op2_stub;
435 }
436
437 static void swap_sample_id_all(union perf_event *event, void *data)
438 {
439 void *end = (void *) event + event->header.size;
440 int size = end - data;
441
442 BUG_ON(size % sizeof(u64));
443 mem_bswap_64(data, size);
444 }
445
446 static void perf_event__all64_swap(union perf_event *event,
447 bool sample_id_all __maybe_unused)
448 {
449 struct perf_event_header *hdr = &event->header;
450 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
451 }
452
453 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
454 {
455 event->comm.pid = bswap_32(event->comm.pid);
456 event->comm.tid = bswap_32(event->comm.tid);
457
458 if (sample_id_all) {
459 void *data = &event->comm.comm;
460
461 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
462 swap_sample_id_all(event, data);
463 }
464 }
465
466 static void perf_event__mmap_swap(union perf_event *event,
467 bool sample_id_all)
468 {
469 event->mmap.pid = bswap_32(event->mmap.pid);
470 event->mmap.tid = bswap_32(event->mmap.tid);
471 event->mmap.start = bswap_64(event->mmap.start);
472 event->mmap.len = bswap_64(event->mmap.len);
473 event->mmap.pgoff = bswap_64(event->mmap.pgoff);
474
475 if (sample_id_all) {
476 void *data = &event->mmap.filename;
477
478 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
479 swap_sample_id_all(event, data);
480 }
481 }
482
483 static void perf_event__mmap2_swap(union perf_event *event,
484 bool sample_id_all)
485 {
486 event->mmap2.pid = bswap_32(event->mmap2.pid);
487 event->mmap2.tid = bswap_32(event->mmap2.tid);
488 event->mmap2.start = bswap_64(event->mmap2.start);
489 event->mmap2.len = bswap_64(event->mmap2.len);
490 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
491 event->mmap2.maj = bswap_32(event->mmap2.maj);
492 event->mmap2.min = bswap_32(event->mmap2.min);
493 event->mmap2.ino = bswap_64(event->mmap2.ino);
494
495 if (sample_id_all) {
496 void *data = &event->mmap2.filename;
497
498 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
499 swap_sample_id_all(event, data);
500 }
501 }
502 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
503 {
504 event->fork.pid = bswap_32(event->fork.pid);
505 event->fork.tid = bswap_32(event->fork.tid);
506 event->fork.ppid = bswap_32(event->fork.ppid);
507 event->fork.ptid = bswap_32(event->fork.ptid);
508 event->fork.time = bswap_64(event->fork.time);
509
510 if (sample_id_all)
511 swap_sample_id_all(event, &event->fork + 1);
512 }
513
514 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
515 {
516 event->read.pid = bswap_32(event->read.pid);
517 event->read.tid = bswap_32(event->read.tid);
518 event->read.value = bswap_64(event->read.value);
519 event->read.time_enabled = bswap_64(event->read.time_enabled);
520 event->read.time_running = bswap_64(event->read.time_running);
521 event->read.id = bswap_64(event->read.id);
522
523 if (sample_id_all)
524 swap_sample_id_all(event, &event->read + 1);
525 }
526
527 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
528 {
529 event->aux.aux_offset = bswap_64(event->aux.aux_offset);
530 event->aux.aux_size = bswap_64(event->aux.aux_size);
531 event->aux.flags = bswap_64(event->aux.flags);
532
533 if (sample_id_all)
534 swap_sample_id_all(event, &event->aux + 1);
535 }
536
537 static void perf_event__itrace_start_swap(union perf_event *event,
538 bool sample_id_all)
539 {
540 event->itrace_start.pid = bswap_32(event->itrace_start.pid);
541 event->itrace_start.tid = bswap_32(event->itrace_start.tid);
542
543 if (sample_id_all)
544 swap_sample_id_all(event, &event->itrace_start + 1);
545 }
546
547 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
548 {
549 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
550 event->context_switch.next_prev_pid =
551 bswap_32(event->context_switch.next_prev_pid);
552 event->context_switch.next_prev_tid =
553 bswap_32(event->context_switch.next_prev_tid);
554 }
555
556 if (sample_id_all)
557 swap_sample_id_all(event, &event->context_switch + 1);
558 }
559
560 static void perf_event__throttle_swap(union perf_event *event,
561 bool sample_id_all)
562 {
563 event->throttle.time = bswap_64(event->throttle.time);
564 event->throttle.id = bswap_64(event->throttle.id);
565 event->throttle.stream_id = bswap_64(event->throttle.stream_id);
566
567 if (sample_id_all)
568 swap_sample_id_all(event, &event->throttle + 1);
569 }
570
571 static u8 revbyte(u8 b)
572 {
573 int rev = (b >> 4) | ((b & 0xf) << 4);
574 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
575 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
576 return (u8) rev;
577 }
578
579 /*
580 * XXX this is hack in attempt to carry flags bitfield
581 * through endian village. ABI says:
582 *
583 * Bit-fields are allocated from right to left (least to most significant)
584 * on little-endian implementations and from left to right (most to least
585 * significant) on big-endian implementations.
586 *
587 * The above seems to be byte specific, so we need to reverse each
588 * byte of the bitfield. 'Internet' also says this might be implementation
589 * specific and we probably need proper fix and carry perf_event_attr
590 * bitfield flags in separate data file FEAT_ section. Thought this seems
591 * to work for now.
592 */
593 static void swap_bitfield(u8 *p, unsigned len)
594 {
595 unsigned i;
596
597 for (i = 0; i < len; i++) {
598 *p = revbyte(*p);
599 p++;
600 }
601 }
602
603 /* exported for swapping attributes in file header */
604 void perf_event__attr_swap(struct perf_event_attr *attr)
605 {
606 attr->type = bswap_32(attr->type);
607 attr->size = bswap_32(attr->size);
608
609 #define bswap_safe(f, n) \
610 (attr->size > (offsetof(struct perf_event_attr, f) + \
611 sizeof(attr->f) * (n)))
612 #define bswap_field(f, sz) \
613 do { \
614 if (bswap_safe(f, 0)) \
615 attr->f = bswap_##sz(attr->f); \
616 } while(0)
617 #define bswap_field_16(f) bswap_field(f, 16)
618 #define bswap_field_32(f) bswap_field(f, 32)
619 #define bswap_field_64(f) bswap_field(f, 64)
620
621 bswap_field_64(config);
622 bswap_field_64(sample_period);
623 bswap_field_64(sample_type);
624 bswap_field_64(read_format);
625 bswap_field_32(wakeup_events);
626 bswap_field_32(bp_type);
627 bswap_field_64(bp_addr);
628 bswap_field_64(bp_len);
629 bswap_field_64(branch_sample_type);
630 bswap_field_64(sample_regs_user);
631 bswap_field_32(sample_stack_user);
632 bswap_field_32(aux_watermark);
633 bswap_field_16(sample_max_stack);
634
635 /*
636 * After read_format are bitfields. Check read_format because
637 * we are unable to use offsetof on bitfield.
638 */
639 if (bswap_safe(read_format, 1))
640 swap_bitfield((u8 *) (&attr->read_format + 1),
641 sizeof(u64));
642 #undef bswap_field_64
643 #undef bswap_field_32
644 #undef bswap_field
645 #undef bswap_safe
646 }
647
648 static void perf_event__hdr_attr_swap(union perf_event *event,
649 bool sample_id_all __maybe_unused)
650 {
651 size_t size;
652
653 perf_event__attr_swap(&event->attr.attr);
654
655 size = event->header.size;
656 size -= (void *)&event->attr.id - (void *)event;
657 mem_bswap_64(event->attr.id, size);
658 }
659
660 static void perf_event__event_update_swap(union perf_event *event,
661 bool sample_id_all __maybe_unused)
662 {
663 event->event_update.type = bswap_64(event->event_update.type);
664 event->event_update.id = bswap_64(event->event_update.id);
665 }
666
667 static void perf_event__event_type_swap(union perf_event *event,
668 bool sample_id_all __maybe_unused)
669 {
670 event->event_type.event_type.event_id =
671 bswap_64(event->event_type.event_type.event_id);
672 }
673
674 static void perf_event__tracing_data_swap(union perf_event *event,
675 bool sample_id_all __maybe_unused)
676 {
677 event->tracing_data.size = bswap_32(event->tracing_data.size);
678 }
679
680 static void perf_event__auxtrace_info_swap(union perf_event *event,
681 bool sample_id_all __maybe_unused)
682 {
683 size_t size;
684
685 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
686
687 size = event->header.size;
688 size -= (void *)&event->auxtrace_info.priv - (void *)event;
689 mem_bswap_64(event->auxtrace_info.priv, size);
690 }
691
692 static void perf_event__auxtrace_swap(union perf_event *event,
693 bool sample_id_all __maybe_unused)
694 {
695 event->auxtrace.size = bswap_64(event->auxtrace.size);
696 event->auxtrace.offset = bswap_64(event->auxtrace.offset);
697 event->auxtrace.reference = bswap_64(event->auxtrace.reference);
698 event->auxtrace.idx = bswap_32(event->auxtrace.idx);
699 event->auxtrace.tid = bswap_32(event->auxtrace.tid);
700 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu);
701 }
702
703 static void perf_event__auxtrace_error_swap(union perf_event *event,
704 bool sample_id_all __maybe_unused)
705 {
706 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
707 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
708 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu);
709 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid);
710 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid);
711 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip);
712 }
713
714 static void perf_event__thread_map_swap(union perf_event *event,
715 bool sample_id_all __maybe_unused)
716 {
717 unsigned i;
718
719 event->thread_map.nr = bswap_64(event->thread_map.nr);
720
721 for (i = 0; i < event->thread_map.nr; i++)
722 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
723 }
724
725 static void perf_event__cpu_map_swap(union perf_event *event,
726 bool sample_id_all __maybe_unused)
727 {
728 struct cpu_map_data *data = &event->cpu_map.data;
729 struct cpu_map_entries *cpus;
730 struct cpu_map_mask *mask;
731 unsigned i;
732
733 data->type = bswap_64(data->type);
734
735 switch (data->type) {
736 case PERF_CPU_MAP__CPUS:
737 cpus = (struct cpu_map_entries *)data->data;
738
739 cpus->nr = bswap_16(cpus->nr);
740
741 for (i = 0; i < cpus->nr; i++)
742 cpus->cpu[i] = bswap_16(cpus->cpu[i]);
743 break;
744 case PERF_CPU_MAP__MASK:
745 mask = (struct cpu_map_mask *) data->data;
746
747 mask->nr = bswap_16(mask->nr);
748 mask->long_size = bswap_16(mask->long_size);
749
750 switch (mask->long_size) {
751 case 4: mem_bswap_32(&mask->mask, mask->nr); break;
752 case 8: mem_bswap_64(&mask->mask, mask->nr); break;
753 default:
754 pr_err("cpu_map swap: unsupported long size\n");
755 }
756 default:
757 break;
758 }
759 }
760
761 static void perf_event__stat_config_swap(union perf_event *event,
762 bool sample_id_all __maybe_unused)
763 {
764 u64 size;
765
766 size = event->stat_config.nr * sizeof(event->stat_config.data[0]);
767 size += 1; /* nr item itself */
768 mem_bswap_64(&event->stat_config.nr, size);
769 }
770
771 static void perf_event__stat_swap(union perf_event *event,
772 bool sample_id_all __maybe_unused)
773 {
774 event->stat.id = bswap_64(event->stat.id);
775 event->stat.thread = bswap_32(event->stat.thread);
776 event->stat.cpu = bswap_32(event->stat.cpu);
777 event->stat.val = bswap_64(event->stat.val);
778 event->stat.ena = bswap_64(event->stat.ena);
779 event->stat.run = bswap_64(event->stat.run);
780 }
781
782 static void perf_event__stat_round_swap(union perf_event *event,
783 bool sample_id_all __maybe_unused)
784 {
785 event->stat_round.type = bswap_64(event->stat_round.type);
786 event->stat_round.time = bswap_64(event->stat_round.time);
787 }
788
789 typedef void (*perf_event__swap_op)(union perf_event *event,
790 bool sample_id_all);
791
792 static perf_event__swap_op perf_event__swap_ops[] = {
793 [PERF_RECORD_MMAP] = perf_event__mmap_swap,
794 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap,
795 [PERF_RECORD_COMM] = perf_event__comm_swap,
796 [PERF_RECORD_FORK] = perf_event__task_swap,
797 [PERF_RECORD_EXIT] = perf_event__task_swap,
798 [PERF_RECORD_LOST] = perf_event__all64_swap,
799 [PERF_RECORD_READ] = perf_event__read_swap,
800 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap,
801 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap,
802 [PERF_RECORD_SAMPLE] = perf_event__all64_swap,
803 [PERF_RECORD_AUX] = perf_event__aux_swap,
804 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap,
805 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap,
806 [PERF_RECORD_SWITCH] = perf_event__switch_swap,
807 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap,
808 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
809 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
810 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
811 [PERF_RECORD_HEADER_BUILD_ID] = NULL,
812 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap,
813 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap,
814 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap,
815 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap,
816 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap,
817 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap,
818 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap,
819 [PERF_RECORD_STAT] = perf_event__stat_swap,
820 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap,
821 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap,
822 [PERF_RECORD_TIME_CONV] = perf_event__all64_swap,
823 [PERF_RECORD_HEADER_MAX] = NULL,
824 };
825
826 /*
827 * When perf record finishes a pass on every buffers, it records this pseudo
828 * event.
829 * We record the max timestamp t found in the pass n.
830 * Assuming these timestamps are monotonic across cpus, we know that if
831 * a buffer still has events with timestamps below t, they will be all
832 * available and then read in the pass n + 1.
833 * Hence when we start to read the pass n + 2, we can safely flush every
834 * events with timestamps below t.
835 *
836 * ============ PASS n =================
837 * CPU 0 | CPU 1
838 * |
839 * cnt1 timestamps | cnt2 timestamps
840 * 1 | 2
841 * 2 | 3
842 * - | 4 <--- max recorded
843 *
844 * ============ PASS n + 1 ==============
845 * CPU 0 | CPU 1
846 * |
847 * cnt1 timestamps | cnt2 timestamps
848 * 3 | 5
849 * 4 | 6
850 * 5 | 7 <---- max recorded
851 *
852 * Flush every events below timestamp 4
853 *
854 * ============ PASS n + 2 ==============
855 * CPU 0 | CPU 1
856 * |
857 * cnt1 timestamps | cnt2 timestamps
858 * 6 | 8
859 * 7 | 9
860 * - | 10
861 *
862 * Flush every events below timestamp 7
863 * etc...
864 */
865 static int process_finished_round(struct perf_tool *tool __maybe_unused,
866 union perf_event *event __maybe_unused,
867 struct ordered_events *oe)
868 {
869 if (dump_trace)
870 fprintf(stdout, "\n");
871 return ordered_events__flush(oe, OE_FLUSH__ROUND);
872 }
873
874 int perf_session__queue_event(struct perf_session *s, union perf_event *event,
875 struct perf_sample *sample, u64 file_offset)
876 {
877 return ordered_events__queue(&s->ordered_events, event, sample, file_offset);
878 }
879
880 static void callchain__lbr_callstack_printf(struct perf_sample *sample)
881 {
882 struct ip_callchain *callchain = sample->callchain;
883 struct branch_stack *lbr_stack = sample->branch_stack;
884 u64 kernel_callchain_nr = callchain->nr;
885 unsigned int i;
886
887 for (i = 0; i < kernel_callchain_nr; i++) {
888 if (callchain->ips[i] == PERF_CONTEXT_USER)
889 break;
890 }
891
892 if ((i != kernel_callchain_nr) && lbr_stack->nr) {
893 u64 total_nr;
894 /*
895 * LBR callstack can only get user call chain,
896 * i is kernel call chain number,
897 * 1 is PERF_CONTEXT_USER.
898 *
899 * The user call chain is stored in LBR registers.
900 * LBR are pair registers. The caller is stored
901 * in "from" register, while the callee is stored
902 * in "to" register.
903 * For example, there is a call stack
904 * "A"->"B"->"C"->"D".
905 * The LBR registers will recorde like
906 * "C"->"D", "B"->"C", "A"->"B".
907 * So only the first "to" register and all "from"
908 * registers are needed to construct the whole stack.
909 */
910 total_nr = i + 1 + lbr_stack->nr + 1;
911 kernel_callchain_nr = i + 1;
912
913 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
914
915 for (i = 0; i < kernel_callchain_nr; i++)
916 printf("..... %2d: %016" PRIx64 "\n",
917 i, callchain->ips[i]);
918
919 printf("..... %2d: %016" PRIx64 "\n",
920 (int)(kernel_callchain_nr), lbr_stack->entries[0].to);
921 for (i = 0; i < lbr_stack->nr; i++)
922 printf("..... %2d: %016" PRIx64 "\n",
923 (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from);
924 }
925 }
926
927 static void callchain__printf(struct perf_evsel *evsel,
928 struct perf_sample *sample)
929 {
930 unsigned int i;
931 struct ip_callchain *callchain = sample->callchain;
932
933 if (perf_evsel__has_branch_callstack(evsel))
934 callchain__lbr_callstack_printf(sample);
935
936 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
937
938 for (i = 0; i < callchain->nr; i++)
939 printf("..... %2d: %016" PRIx64 "\n",
940 i, callchain->ips[i]);
941 }
942
943 static void branch_stack__printf(struct perf_sample *sample)
944 {
945 uint64_t i;
946
947 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
948
949 for (i = 0; i < sample->branch_stack->nr; i++) {
950 struct branch_entry *e = &sample->branch_stack->entries[i];
951
952 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n",
953 i, e->from, e->to,
954 (unsigned short)e->flags.cycles,
955 e->flags.mispred ? "M" : " ",
956 e->flags.predicted ? "P" : " ",
957 e->flags.abort ? "A" : " ",
958 e->flags.in_tx ? "T" : " ",
959 (unsigned)e->flags.reserved);
960 }
961 }
962
963 static void regs_dump__printf(u64 mask, u64 *regs)
964 {
965 unsigned rid, i = 0;
966
967 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
968 u64 val = regs[i++];
969
970 printf(".... %-5s 0x%" PRIx64 "\n",
971 perf_reg_name(rid), val);
972 }
973 }
974
975 static const char *regs_abi[] = {
976 [PERF_SAMPLE_REGS_ABI_NONE] = "none",
977 [PERF_SAMPLE_REGS_ABI_32] = "32-bit",
978 [PERF_SAMPLE_REGS_ABI_64] = "64-bit",
979 };
980
981 static inline const char *regs_dump_abi(struct regs_dump *d)
982 {
983 if (d->abi > PERF_SAMPLE_REGS_ABI_64)
984 return "unknown";
985
986 return regs_abi[d->abi];
987 }
988
989 static void regs__printf(const char *type, struct regs_dump *regs)
990 {
991 u64 mask = regs->mask;
992
993 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
994 type,
995 mask,
996 regs_dump_abi(regs));
997
998 regs_dump__printf(mask, regs->regs);
999 }
1000
1001 static void regs_user__printf(struct perf_sample *sample)
1002 {
1003 struct regs_dump *user_regs = &sample->user_regs;
1004
1005 if (user_regs->regs)
1006 regs__printf("user", user_regs);
1007 }
1008
1009 static void regs_intr__printf(struct perf_sample *sample)
1010 {
1011 struct regs_dump *intr_regs = &sample->intr_regs;
1012
1013 if (intr_regs->regs)
1014 regs__printf("intr", intr_regs);
1015 }
1016
1017 static void stack_user__printf(struct stack_dump *dump)
1018 {
1019 printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
1020 dump->size, dump->offset);
1021 }
1022
1023 static void perf_evlist__print_tstamp(struct perf_evlist *evlist,
1024 union perf_event *event,
1025 struct perf_sample *sample)
1026 {
1027 u64 sample_type = __perf_evlist__combined_sample_type(evlist);
1028
1029 if (event->header.type != PERF_RECORD_SAMPLE &&
1030 !perf_evlist__sample_id_all(evlist)) {
1031 fputs("-1 -1 ", stdout);
1032 return;
1033 }
1034
1035 if ((sample_type & PERF_SAMPLE_CPU))
1036 printf("%u ", sample->cpu);
1037
1038 if (sample_type & PERF_SAMPLE_TIME)
1039 printf("%" PRIu64 " ", sample->time);
1040 }
1041
1042 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
1043 {
1044 printf("... sample_read:\n");
1045
1046 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1047 printf("...... time enabled %016" PRIx64 "\n",
1048 sample->read.time_enabled);
1049
1050 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1051 printf("...... time running %016" PRIx64 "\n",
1052 sample->read.time_running);
1053
1054 if (read_format & PERF_FORMAT_GROUP) {
1055 u64 i;
1056
1057 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
1058
1059 for (i = 0; i < sample->read.group.nr; i++) {
1060 struct sample_read_value *value;
1061
1062 value = &sample->read.group.values[i];
1063 printf("..... id %016" PRIx64
1064 ", value %016" PRIx64 "\n",
1065 value->id, value->value);
1066 }
1067 } else
1068 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
1069 sample->read.one.id, sample->read.one.value);
1070 }
1071
1072 static void dump_event(struct perf_evlist *evlist, union perf_event *event,
1073 u64 file_offset, struct perf_sample *sample)
1074 {
1075 if (!dump_trace)
1076 return;
1077
1078 printf("\n%#" PRIx64 " [%#x]: event: %d\n",
1079 file_offset, event->header.size, event->header.type);
1080
1081 trace_event(event);
1082
1083 if (sample)
1084 perf_evlist__print_tstamp(evlist, event, sample);
1085
1086 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
1087 event->header.size, perf_event__name(event->header.type));
1088 }
1089
1090 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
1091 struct perf_sample *sample)
1092 {
1093 u64 sample_type;
1094
1095 if (!dump_trace)
1096 return;
1097
1098 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
1099 event->header.misc, sample->pid, sample->tid, sample->ip,
1100 sample->period, sample->addr);
1101
1102 sample_type = evsel->attr.sample_type;
1103
1104 if (sample_type & PERF_SAMPLE_CALLCHAIN)
1105 callchain__printf(evsel, sample);
1106
1107 if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !perf_evsel__has_branch_callstack(evsel))
1108 branch_stack__printf(sample);
1109
1110 if (sample_type & PERF_SAMPLE_REGS_USER)
1111 regs_user__printf(sample);
1112
1113 if (sample_type & PERF_SAMPLE_REGS_INTR)
1114 regs_intr__printf(sample);
1115
1116 if (sample_type & PERF_SAMPLE_STACK_USER)
1117 stack_user__printf(&sample->user_stack);
1118
1119 if (sample_type & PERF_SAMPLE_WEIGHT)
1120 printf("... weight: %" PRIu64 "\n", sample->weight);
1121
1122 if (sample_type & PERF_SAMPLE_DATA_SRC)
1123 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
1124
1125 if (sample_type & PERF_SAMPLE_PHYS_ADDR)
1126 printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr);
1127
1128 if (sample_type & PERF_SAMPLE_TRANSACTION)
1129 printf("... transaction: %" PRIx64 "\n", sample->transaction);
1130
1131 if (sample_type & PERF_SAMPLE_READ)
1132 sample_read__printf(sample, evsel->attr.read_format);
1133 }
1134
1135 static void dump_read(struct perf_evsel *evsel, union perf_event *event)
1136 {
1137 struct read_event *read_event = &event->read;
1138 u64 read_format;
1139
1140 if (!dump_trace)
1141 return;
1142
1143 printf(": %d %d %s %" PRIu64 "\n", event->read.pid, event->read.tid,
1144 evsel ? perf_evsel__name(evsel) : "FAIL",
1145 event->read.value);
1146
1147 read_format = evsel->attr.read_format;
1148
1149 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1150 printf("... time enabled : %" PRIu64 "\n", read_event->time_enabled);
1151
1152 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1153 printf("... time running : %" PRIu64 "\n", read_event->time_running);
1154
1155 if (read_format & PERF_FORMAT_ID)
1156 printf("... id : %" PRIu64 "\n", read_event->id);
1157 }
1158
1159 static struct machine *machines__find_for_cpumode(struct machines *machines,
1160 union perf_event *event,
1161 struct perf_sample *sample)
1162 {
1163 struct machine *machine;
1164
1165 if (perf_guest &&
1166 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1167 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1168 u32 pid;
1169
1170 if (event->header.type == PERF_RECORD_MMAP
1171 || event->header.type == PERF_RECORD_MMAP2)
1172 pid = event->mmap.pid;
1173 else
1174 pid = sample->pid;
1175
1176 machine = machines__find(machines, pid);
1177 if (!machine)
1178 machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID);
1179 return machine;
1180 }
1181
1182 return &machines->host;
1183 }
1184
1185 static int deliver_sample_value(struct perf_evlist *evlist,
1186 struct perf_tool *tool,
1187 union perf_event *event,
1188 struct perf_sample *sample,
1189 struct sample_read_value *v,
1190 struct machine *machine)
1191 {
1192 struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
1193
1194 if (sid) {
1195 sample->id = v->id;
1196 sample->period = v->value - sid->period;
1197 sid->period = v->value;
1198 }
1199
1200 if (!sid || sid->evsel == NULL) {
1201 ++evlist->stats.nr_unknown_id;
1202 return 0;
1203 }
1204
1205 return tool->sample(tool, event, sample, sid->evsel, machine);
1206 }
1207
1208 static int deliver_sample_group(struct perf_evlist *evlist,
1209 struct perf_tool *tool,
1210 union perf_event *event,
1211 struct perf_sample *sample,
1212 struct machine *machine)
1213 {
1214 int ret = -EINVAL;
1215 u64 i;
1216
1217 for (i = 0; i < sample->read.group.nr; i++) {
1218 ret = deliver_sample_value(evlist, tool, event, sample,
1219 &sample->read.group.values[i],
1220 machine);
1221 if (ret)
1222 break;
1223 }
1224
1225 return ret;
1226 }
1227
1228 static int
1229 perf_evlist__deliver_sample(struct perf_evlist *evlist,
1230 struct perf_tool *tool,
1231 union perf_event *event,
1232 struct perf_sample *sample,
1233 struct perf_evsel *evsel,
1234 struct machine *machine)
1235 {
1236 /* We know evsel != NULL. */
1237 u64 sample_type = evsel->attr.sample_type;
1238 u64 read_format = evsel->attr.read_format;
1239
1240 /* Standard sample delivery. */
1241 if (!(sample_type & PERF_SAMPLE_READ))
1242 return tool->sample(tool, event, sample, evsel, machine);
1243
1244 /* For PERF_SAMPLE_READ we have either single or group mode. */
1245 if (read_format & PERF_FORMAT_GROUP)
1246 return deliver_sample_group(evlist, tool, event, sample,
1247 machine);
1248 else
1249 return deliver_sample_value(evlist, tool, event, sample,
1250 &sample->read.one, machine);
1251 }
1252
1253 static int machines__deliver_event(struct machines *machines,
1254 struct perf_evlist *evlist,
1255 union perf_event *event,
1256 struct perf_sample *sample,
1257 struct perf_tool *tool, u64 file_offset)
1258 {
1259 struct perf_evsel *evsel;
1260 struct machine *machine;
1261
1262 dump_event(evlist, event, file_offset, sample);
1263
1264 evsel = perf_evlist__id2evsel(evlist, sample->id);
1265
1266 machine = machines__find_for_cpumode(machines, event, sample);
1267
1268 switch (event->header.type) {
1269 case PERF_RECORD_SAMPLE:
1270 if (evsel == NULL) {
1271 ++evlist->stats.nr_unknown_id;
1272 return 0;
1273 }
1274 dump_sample(evsel, event, sample);
1275 if (machine == NULL) {
1276 ++evlist->stats.nr_unprocessable_samples;
1277 return 0;
1278 }
1279 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1280 case PERF_RECORD_MMAP:
1281 return tool->mmap(tool, event, sample, machine);
1282 case PERF_RECORD_MMAP2:
1283 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1284 ++evlist->stats.nr_proc_map_timeout;
1285 return tool->mmap2(tool, event, sample, machine);
1286 case PERF_RECORD_COMM:
1287 return tool->comm(tool, event, sample, machine);
1288 case PERF_RECORD_NAMESPACES:
1289 return tool->namespaces(tool, event, sample, machine);
1290 case PERF_RECORD_FORK:
1291 return tool->fork(tool, event, sample, machine);
1292 case PERF_RECORD_EXIT:
1293 return tool->exit(tool, event, sample, machine);
1294 case PERF_RECORD_LOST:
1295 if (tool->lost == perf_event__process_lost)
1296 evlist->stats.total_lost += event->lost.lost;
1297 return tool->lost(tool, event, sample, machine);
1298 case PERF_RECORD_LOST_SAMPLES:
1299 if (tool->lost_samples == perf_event__process_lost_samples)
1300 evlist->stats.total_lost_samples += event->lost_samples.lost;
1301 return tool->lost_samples(tool, event, sample, machine);
1302 case PERF_RECORD_READ:
1303 dump_read(evsel, event);
1304 return tool->read(tool, event, sample, evsel, machine);
1305 case PERF_RECORD_THROTTLE:
1306 return tool->throttle(tool, event, sample, machine);
1307 case PERF_RECORD_UNTHROTTLE:
1308 return tool->unthrottle(tool, event, sample, machine);
1309 case PERF_RECORD_AUX:
1310 if (tool->aux == perf_event__process_aux) {
1311 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED)
1312 evlist->stats.total_aux_lost += 1;
1313 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL)
1314 evlist->stats.total_aux_partial += 1;
1315 }
1316 return tool->aux(tool, event, sample, machine);
1317 case PERF_RECORD_ITRACE_START:
1318 return tool->itrace_start(tool, event, sample, machine);
1319 case PERF_RECORD_SWITCH:
1320 case PERF_RECORD_SWITCH_CPU_WIDE:
1321 return tool->context_switch(tool, event, sample, machine);
1322 default:
1323 ++evlist->stats.nr_unknown_events;
1324 return -1;
1325 }
1326 }
1327
1328 static int perf_session__deliver_event(struct perf_session *session,
1329 union perf_event *event,
1330 struct perf_sample *sample,
1331 struct perf_tool *tool,
1332 u64 file_offset)
1333 {
1334 int ret;
1335
1336 ret = auxtrace__process_event(session, event, sample, tool);
1337 if (ret < 0)
1338 return ret;
1339 if (ret > 0)
1340 return 0;
1341
1342 return machines__deliver_event(&session->machines, session->evlist,
1343 event, sample, tool, file_offset);
1344 }
1345
1346 static s64 perf_session__process_user_event(struct perf_session *session,
1347 union perf_event *event,
1348 u64 file_offset)
1349 {
1350 struct ordered_events *oe = &session->ordered_events;
1351 struct perf_tool *tool = session->tool;
1352 int fd = perf_data_file__fd(session->file);
1353 int err;
1354
1355 dump_event(session->evlist, event, file_offset, NULL);
1356
1357 /* These events are processed right away */
1358 switch (event->header.type) {
1359 case PERF_RECORD_HEADER_ATTR:
1360 err = tool->attr(tool, event, &session->evlist);
1361 if (err == 0) {
1362 perf_session__set_id_hdr_size(session);
1363 perf_session__set_comm_exec(session);
1364 }
1365 return err;
1366 case PERF_RECORD_EVENT_UPDATE:
1367 return tool->event_update(tool, event, &session->evlist);
1368 case PERF_RECORD_HEADER_EVENT_TYPE:
1369 /*
1370 * Depreceated, but we need to handle it for sake
1371 * of old data files create in pipe mode.
1372 */
1373 return 0;
1374 case PERF_RECORD_HEADER_TRACING_DATA:
1375 /* setup for reading amidst mmap */
1376 lseek(fd, file_offset, SEEK_SET);
1377 return tool->tracing_data(tool, event, session);
1378 case PERF_RECORD_HEADER_BUILD_ID:
1379 return tool->build_id(tool, event, session);
1380 case PERF_RECORD_FINISHED_ROUND:
1381 return tool->finished_round(tool, event, oe);
1382 case PERF_RECORD_ID_INDEX:
1383 return tool->id_index(tool, event, session);
1384 case PERF_RECORD_AUXTRACE_INFO:
1385 return tool->auxtrace_info(tool, event, session);
1386 case PERF_RECORD_AUXTRACE:
1387 /* setup for reading amidst mmap */
1388 lseek(fd, file_offset + event->header.size, SEEK_SET);
1389 return tool->auxtrace(tool, event, session);
1390 case PERF_RECORD_AUXTRACE_ERROR:
1391 perf_session__auxtrace_error_inc(session, event);
1392 return tool->auxtrace_error(tool, event, session);
1393 case PERF_RECORD_THREAD_MAP:
1394 return tool->thread_map(tool, event, session);
1395 case PERF_RECORD_CPU_MAP:
1396 return tool->cpu_map(tool, event, session);
1397 case PERF_RECORD_STAT_CONFIG:
1398 return tool->stat_config(tool, event, session);
1399 case PERF_RECORD_STAT:
1400 return tool->stat(tool, event, session);
1401 case PERF_RECORD_STAT_ROUND:
1402 return tool->stat_round(tool, event, session);
1403 case PERF_RECORD_TIME_CONV:
1404 session->time_conv = event->time_conv;
1405 return tool->time_conv(tool, event, session);
1406 case PERF_RECORD_HEADER_FEATURE:
1407 return tool->feature(tool, event, session);
1408 default:
1409 return -EINVAL;
1410 }
1411 }
1412
1413 int perf_session__deliver_synth_event(struct perf_session *session,
1414 union perf_event *event,
1415 struct perf_sample *sample)
1416 {
1417 struct perf_evlist *evlist = session->evlist;
1418 struct perf_tool *tool = session->tool;
1419
1420 events_stats__inc(&evlist->stats, event->header.type);
1421
1422 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1423 return perf_session__process_user_event(session, event, 0);
1424
1425 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0);
1426 }
1427
1428 static void event_swap(union perf_event *event, bool sample_id_all)
1429 {
1430 perf_event__swap_op swap;
1431
1432 swap = perf_event__swap_ops[event->header.type];
1433 if (swap)
1434 swap(event, sample_id_all);
1435 }
1436
1437 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1438 void *buf, size_t buf_sz,
1439 union perf_event **event_ptr,
1440 struct perf_sample *sample)
1441 {
1442 union perf_event *event;
1443 size_t hdr_sz, rest;
1444 int fd;
1445
1446 if (session->one_mmap && !session->header.needs_swap) {
1447 event = file_offset - session->one_mmap_offset +
1448 session->one_mmap_addr;
1449 goto out_parse_sample;
1450 }
1451
1452 if (perf_data_file__is_pipe(session->file))
1453 return -1;
1454
1455 fd = perf_data_file__fd(session->file);
1456 hdr_sz = sizeof(struct perf_event_header);
1457
1458 if (buf_sz < hdr_sz)
1459 return -1;
1460
1461 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1462 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1463 return -1;
1464
1465 event = (union perf_event *)buf;
1466
1467 if (session->header.needs_swap)
1468 perf_event_header__bswap(&event->header);
1469
1470 if (event->header.size < hdr_sz || event->header.size > buf_sz)
1471 return -1;
1472
1473 rest = event->header.size - hdr_sz;
1474
1475 if (readn(fd, buf, rest) != (ssize_t)rest)
1476 return -1;
1477
1478 if (session->header.needs_swap)
1479 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1480
1481 out_parse_sample:
1482
1483 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1484 perf_evlist__parse_sample(session->evlist, event, sample))
1485 return -1;
1486
1487 *event_ptr = event;
1488
1489 return 0;
1490 }
1491
1492 static s64 perf_session__process_event(struct perf_session *session,
1493 union perf_event *event, u64 file_offset)
1494 {
1495 struct perf_evlist *evlist = session->evlist;
1496 struct perf_tool *tool = session->tool;
1497 struct perf_sample sample;
1498 int ret;
1499
1500 if (session->header.needs_swap)
1501 event_swap(event, perf_evlist__sample_id_all(evlist));
1502
1503 if (event->header.type >= PERF_RECORD_HEADER_MAX)
1504 return -EINVAL;
1505
1506 events_stats__inc(&evlist->stats, event->header.type);
1507
1508 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1509 return perf_session__process_user_event(session, event, file_offset);
1510
1511 /*
1512 * For all kernel events we get the sample data
1513 */
1514 ret = perf_evlist__parse_sample(evlist, event, &sample);
1515 if (ret)
1516 return ret;
1517
1518 if (tool->ordered_events) {
1519 ret = perf_session__queue_event(session, event, &sample, file_offset);
1520 if (ret != -ETIME)
1521 return ret;
1522 }
1523
1524 return perf_session__deliver_event(session, event, &sample, tool,
1525 file_offset);
1526 }
1527
1528 void perf_event_header__bswap(struct perf_event_header *hdr)
1529 {
1530 hdr->type = bswap_32(hdr->type);
1531 hdr->misc = bswap_16(hdr->misc);
1532 hdr->size = bswap_16(hdr->size);
1533 }
1534
1535 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1536 {
1537 return machine__findnew_thread(&session->machines.host, -1, pid);
1538 }
1539
1540 int perf_session__register_idle_thread(struct perf_session *session)
1541 {
1542 struct thread *thread;
1543 int err = 0;
1544
1545 thread = machine__findnew_thread(&session->machines.host, 0, 0);
1546 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1547 pr_err("problem inserting idle task.\n");
1548 err = -1;
1549 }
1550
1551 if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) {
1552 pr_err("problem inserting idle task.\n");
1553 err = -1;
1554 }
1555
1556 /* machine__findnew_thread() got the thread, so put it */
1557 thread__put(thread);
1558 return err;
1559 }
1560
1561 static void
1562 perf_session__warn_order(const struct perf_session *session)
1563 {
1564 const struct ordered_events *oe = &session->ordered_events;
1565 struct perf_evsel *evsel;
1566 bool should_warn = true;
1567
1568 evlist__for_each_entry(session->evlist, evsel) {
1569 if (evsel->attr.write_backward)
1570 should_warn = false;
1571 }
1572
1573 if (!should_warn)
1574 return;
1575 if (oe->nr_unordered_events != 0)
1576 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1577 }
1578
1579 static void perf_session__warn_about_errors(const struct perf_session *session)
1580 {
1581 const struct events_stats *stats = &session->evlist->stats;
1582
1583 if (session->tool->lost == perf_event__process_lost &&
1584 stats->nr_events[PERF_RECORD_LOST] != 0) {
1585 ui__warning("Processed %d events and lost %d chunks!\n\n"
1586 "Check IO/CPU overload!\n\n",
1587 stats->nr_events[0],
1588 stats->nr_events[PERF_RECORD_LOST]);
1589 }
1590
1591 if (session->tool->lost_samples == perf_event__process_lost_samples) {
1592 double drop_rate;
1593
1594 drop_rate = (double)stats->total_lost_samples /
1595 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1596 if (drop_rate > 0.05) {
1597 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%% samples!\n\n",
1598 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1599 drop_rate * 100.0);
1600 }
1601 }
1602
1603 if (session->tool->aux == perf_event__process_aux &&
1604 stats->total_aux_lost != 0) {
1605 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1606 stats->total_aux_lost,
1607 stats->nr_events[PERF_RECORD_AUX]);
1608 }
1609
1610 if (session->tool->aux == perf_event__process_aux &&
1611 stats->total_aux_partial != 0) {
1612 bool vmm_exclusive = false;
1613
1614 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive",
1615 &vmm_exclusive);
1616
1617 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n"
1618 "Are you running a KVM guest in the background?%s\n\n",
1619 stats->total_aux_partial,
1620 stats->nr_events[PERF_RECORD_AUX],
1621 vmm_exclusive ?
1622 "\nReloading kvm_intel module with vmm_exclusive=0\n"
1623 "will reduce the gaps to only guest's timeslices." :
1624 "");
1625 }
1626
1627 if (stats->nr_unknown_events != 0) {
1628 ui__warning("Found %u unknown events!\n\n"
1629 "Is this an older tool processing a perf.data "
1630 "file generated by a more recent tool?\n\n"
1631 "If that is not the case, consider "
1632 "reporting to linux-kernel@vger.kernel.org.\n\n",
1633 stats->nr_unknown_events);
1634 }
1635
1636 if (stats->nr_unknown_id != 0) {
1637 ui__warning("%u samples with id not present in the header\n",
1638 stats->nr_unknown_id);
1639 }
1640
1641 if (stats->nr_invalid_chains != 0) {
1642 ui__warning("Found invalid callchains!\n\n"
1643 "%u out of %u events were discarded for this reason.\n\n"
1644 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1645 stats->nr_invalid_chains,
1646 stats->nr_events[PERF_RECORD_SAMPLE]);
1647 }
1648
1649 if (stats->nr_unprocessable_samples != 0) {
1650 ui__warning("%u unprocessable samples recorded.\n"
1651 "Do you have a KVM guest running and not using 'perf kvm'?\n",
1652 stats->nr_unprocessable_samples);
1653 }
1654
1655 perf_session__warn_order(session);
1656
1657 events_stats__auxtrace_error_warn(stats);
1658
1659 if (stats->nr_proc_map_timeout != 0) {
1660 ui__warning("%d map information files for pre-existing threads were\n"
1661 "not processed, if there are samples for addresses they\n"
1662 "will not be resolved, you may find out which are these\n"
1663 "threads by running with -v and redirecting the output\n"
1664 "to a file.\n"
1665 "The time limit to process proc map is too short?\n"
1666 "Increase it by --proc-map-timeout\n",
1667 stats->nr_proc_map_timeout);
1668 }
1669 }
1670
1671 static int perf_session__flush_thread_stack(struct thread *thread,
1672 void *p __maybe_unused)
1673 {
1674 return thread_stack__flush(thread);
1675 }
1676
1677 static int perf_session__flush_thread_stacks(struct perf_session *session)
1678 {
1679 return machines__for_each_thread(&session->machines,
1680 perf_session__flush_thread_stack,
1681 NULL);
1682 }
1683
1684 volatile int session_done;
1685
1686 static int __perf_session__process_pipe_events(struct perf_session *session)
1687 {
1688 struct ordered_events *oe = &session->ordered_events;
1689 struct perf_tool *tool = session->tool;
1690 int fd = perf_data_file__fd(session->file);
1691 union perf_event *event;
1692 uint32_t size, cur_size = 0;
1693 void *buf = NULL;
1694 s64 skip = 0;
1695 u64 head;
1696 ssize_t err;
1697 void *p;
1698
1699 perf_tool__fill_defaults(tool);
1700
1701 head = 0;
1702 cur_size = sizeof(union perf_event);
1703
1704 buf = malloc(cur_size);
1705 if (!buf)
1706 return -errno;
1707 ordered_events__set_copy_on_queue(oe, true);
1708 more:
1709 event = buf;
1710 err = readn(fd, event, sizeof(struct perf_event_header));
1711 if (err <= 0) {
1712 if (err == 0)
1713 goto done;
1714
1715 pr_err("failed to read event header\n");
1716 goto out_err;
1717 }
1718
1719 if (session->header.needs_swap)
1720 perf_event_header__bswap(&event->header);
1721
1722 size = event->header.size;
1723 if (size < sizeof(struct perf_event_header)) {
1724 pr_err("bad event header size\n");
1725 goto out_err;
1726 }
1727
1728 if (size > cur_size) {
1729 void *new = realloc(buf, size);
1730 if (!new) {
1731 pr_err("failed to allocate memory to read event\n");
1732 goto out_err;
1733 }
1734 buf = new;
1735 cur_size = size;
1736 event = buf;
1737 }
1738 p = event;
1739 p += sizeof(struct perf_event_header);
1740
1741 if (size - sizeof(struct perf_event_header)) {
1742 err = readn(fd, p, size - sizeof(struct perf_event_header));
1743 if (err <= 0) {
1744 if (err == 0) {
1745 pr_err("unexpected end of event stream\n");
1746 goto done;
1747 }
1748
1749 pr_err("failed to read event data\n");
1750 goto out_err;
1751 }
1752 }
1753
1754 if ((skip = perf_session__process_event(session, event, head)) < 0) {
1755 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1756 head, event->header.size, event->header.type);
1757 err = -EINVAL;
1758 goto out_err;
1759 }
1760
1761 head += size;
1762
1763 if (skip > 0)
1764 head += skip;
1765
1766 if (!session_done())
1767 goto more;
1768 done:
1769 /* do the final flush for ordered samples */
1770 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1771 if (err)
1772 goto out_err;
1773 err = auxtrace__flush_events(session, tool);
1774 if (err)
1775 goto out_err;
1776 err = perf_session__flush_thread_stacks(session);
1777 out_err:
1778 free(buf);
1779 perf_session__warn_about_errors(session);
1780 ordered_events__free(&session->ordered_events);
1781 auxtrace__free_events(session);
1782 return err;
1783 }
1784
1785 static union perf_event *
1786 fetch_mmaped_event(struct perf_session *session,
1787 u64 head, size_t mmap_size, char *buf)
1788 {
1789 union perf_event *event;
1790
1791 /*
1792 * Ensure we have enough space remaining to read
1793 * the size of the event in the headers.
1794 */
1795 if (head + sizeof(event->header) > mmap_size)
1796 return NULL;
1797
1798 event = (union perf_event *)(buf + head);
1799
1800 if (session->header.needs_swap)
1801 perf_event_header__bswap(&event->header);
1802
1803 if (head + event->header.size > mmap_size) {
1804 /* We're not fetching the event so swap back again */
1805 if (session->header.needs_swap)
1806 perf_event_header__bswap(&event->header);
1807 return NULL;
1808 }
1809
1810 return event;
1811 }
1812
1813 /*
1814 * On 64bit we can mmap the data file in one go. No need for tiny mmap
1815 * slices. On 32bit we use 32MB.
1816 */
1817 #if BITS_PER_LONG == 64
1818 #define MMAP_SIZE ULLONG_MAX
1819 #define NUM_MMAPS 1
1820 #else
1821 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1822 #define NUM_MMAPS 128
1823 #endif
1824
1825 static int __perf_session__process_events(struct perf_session *session,
1826 u64 data_offset, u64 data_size,
1827 u64 file_size)
1828 {
1829 struct ordered_events *oe = &session->ordered_events;
1830 struct perf_tool *tool = session->tool;
1831 int fd = perf_data_file__fd(session->file);
1832 u64 head, page_offset, file_offset, file_pos, size;
1833 int err, mmap_prot, mmap_flags, map_idx = 0;
1834 size_t mmap_size;
1835 char *buf, *mmaps[NUM_MMAPS];
1836 union perf_event *event;
1837 struct ui_progress prog;
1838 s64 skip;
1839
1840 perf_tool__fill_defaults(tool);
1841
1842 page_offset = page_size * (data_offset / page_size);
1843 file_offset = page_offset;
1844 head = data_offset - page_offset;
1845
1846 if (data_size == 0)
1847 goto out;
1848
1849 if (data_offset + data_size < file_size)
1850 file_size = data_offset + data_size;
1851
1852 ui_progress__init(&prog, file_size, "Processing events...");
1853
1854 mmap_size = MMAP_SIZE;
1855 if (mmap_size > file_size) {
1856 mmap_size = file_size;
1857 session->one_mmap = true;
1858 }
1859
1860 memset(mmaps, 0, sizeof(mmaps));
1861
1862 mmap_prot = PROT_READ;
1863 mmap_flags = MAP_SHARED;
1864
1865 if (session->header.needs_swap) {
1866 mmap_prot |= PROT_WRITE;
1867 mmap_flags = MAP_PRIVATE;
1868 }
1869 remap:
1870 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1871 file_offset);
1872 if (buf == MAP_FAILED) {
1873 pr_err("failed to mmap file\n");
1874 err = -errno;
1875 goto out_err;
1876 }
1877 mmaps[map_idx] = buf;
1878 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1879 file_pos = file_offset + head;
1880 if (session->one_mmap) {
1881 session->one_mmap_addr = buf;
1882 session->one_mmap_offset = file_offset;
1883 }
1884
1885 more:
1886 event = fetch_mmaped_event(session, head, mmap_size, buf);
1887 if (!event) {
1888 if (mmaps[map_idx]) {
1889 munmap(mmaps[map_idx], mmap_size);
1890 mmaps[map_idx] = NULL;
1891 }
1892
1893 page_offset = page_size * (head / page_size);
1894 file_offset += page_offset;
1895 head -= page_offset;
1896 goto remap;
1897 }
1898
1899 size = event->header.size;
1900
1901 if (size < sizeof(struct perf_event_header) ||
1902 (skip = perf_session__process_event(session, event, file_pos)) < 0) {
1903 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1904 file_offset + head, event->header.size,
1905 event->header.type);
1906 err = -EINVAL;
1907 goto out_err;
1908 }
1909
1910 if (skip)
1911 size += skip;
1912
1913 head += size;
1914 file_pos += size;
1915
1916 ui_progress__update(&prog, size);
1917
1918 if (session_done())
1919 goto out;
1920
1921 if (file_pos < file_size)
1922 goto more;
1923
1924 out:
1925 /* do the final flush for ordered samples */
1926 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1927 if (err)
1928 goto out_err;
1929 err = auxtrace__flush_events(session, tool);
1930 if (err)
1931 goto out_err;
1932 err = perf_session__flush_thread_stacks(session);
1933 out_err:
1934 ui_progress__finish();
1935 perf_session__warn_about_errors(session);
1936 /*
1937 * We may switching perf.data output, make ordered_events
1938 * reusable.
1939 */
1940 ordered_events__reinit(&session->ordered_events);
1941 auxtrace__free_events(session);
1942 session->one_mmap = false;
1943 return err;
1944 }
1945
1946 int perf_session__process_events(struct perf_session *session)
1947 {
1948 u64 size = perf_data_file__size(session->file);
1949 int err;
1950
1951 if (perf_session__register_idle_thread(session) < 0)
1952 return -ENOMEM;
1953
1954 if (!perf_data_file__is_pipe(session->file))
1955 err = __perf_session__process_events(session,
1956 session->header.data_offset,
1957 session->header.data_size, size);
1958 else
1959 err = __perf_session__process_pipe_events(session);
1960
1961 return err;
1962 }
1963
1964 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1965 {
1966 struct perf_evsel *evsel;
1967
1968 evlist__for_each_entry(session->evlist, evsel) {
1969 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1970 return true;
1971 }
1972
1973 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1974 return false;
1975 }
1976
1977 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1978 const char *symbol_name, u64 addr)
1979 {
1980 char *bracket;
1981 int i;
1982 struct ref_reloc_sym *ref;
1983
1984 ref = zalloc(sizeof(struct ref_reloc_sym));
1985 if (ref == NULL)
1986 return -ENOMEM;
1987
1988 ref->name = strdup(symbol_name);
1989 if (ref->name == NULL) {
1990 free(ref);
1991 return -ENOMEM;
1992 }
1993
1994 bracket = strchr(ref->name, ']');
1995 if (bracket)
1996 *bracket = '\0';
1997
1998 ref->addr = addr;
1999
2000 for (i = 0; i < MAP__NR_TYPES; ++i) {
2001 struct kmap *kmap = map__kmap(maps[i]);
2002
2003 if (!kmap)
2004 continue;
2005 kmap->ref_reloc_sym = ref;
2006 }
2007
2008 return 0;
2009 }
2010
2011 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
2012 {
2013 return machines__fprintf_dsos(&session->machines, fp);
2014 }
2015
2016 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
2017 bool (skip)(struct dso *dso, int parm), int parm)
2018 {
2019 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
2020 }
2021
2022 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
2023 {
2024 size_t ret;
2025 const char *msg = "";
2026
2027 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
2028 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
2029
2030 ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
2031
2032 ret += events_stats__fprintf(&session->evlist->stats, fp);
2033 return ret;
2034 }
2035
2036 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
2037 {
2038 /*
2039 * FIXME: Here we have to actually print all the machines in this
2040 * session, not just the host...
2041 */
2042 return machine__fprintf(&session->machines.host, fp);
2043 }
2044
2045 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
2046 unsigned int type)
2047 {
2048 struct perf_evsel *pos;
2049
2050 evlist__for_each_entry(session->evlist, pos) {
2051 if (pos->attr.type == type)
2052 return pos;
2053 }
2054 return NULL;
2055 }
2056
2057 int perf_session__cpu_bitmap(struct perf_session *session,
2058 const char *cpu_list, unsigned long *cpu_bitmap)
2059 {
2060 int i, err = -1;
2061 struct cpu_map *map;
2062
2063 for (i = 0; i < PERF_TYPE_MAX; ++i) {
2064 struct perf_evsel *evsel;
2065
2066 evsel = perf_session__find_first_evtype(session, i);
2067 if (!evsel)
2068 continue;
2069
2070 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
2071 pr_err("File does not contain CPU events. "
2072 "Remove -C option to proceed.\n");
2073 return -1;
2074 }
2075 }
2076
2077 map = cpu_map__new(cpu_list);
2078 if (map == NULL) {
2079 pr_err("Invalid cpu_list\n");
2080 return -1;
2081 }
2082
2083 for (i = 0; i < map->nr; i++) {
2084 int cpu = map->map[i];
2085
2086 if (cpu >= MAX_NR_CPUS) {
2087 pr_err("Requested CPU %d too large. "
2088 "Consider raising MAX_NR_CPUS\n", cpu);
2089 goto out_delete_map;
2090 }
2091
2092 set_bit(cpu, cpu_bitmap);
2093 }
2094
2095 err = 0;
2096
2097 out_delete_map:
2098 cpu_map__put(map);
2099 return err;
2100 }
2101
2102 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
2103 bool full)
2104 {
2105 if (session == NULL || fp == NULL)
2106 return;
2107
2108 fprintf(fp, "# ========\n");
2109 perf_header__fprintf_info(session, fp, full);
2110 fprintf(fp, "# ========\n#\n");
2111 }
2112
2113
2114 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
2115 const struct perf_evsel_str_handler *assocs,
2116 size_t nr_assocs)
2117 {
2118 struct perf_evsel *evsel;
2119 size_t i;
2120 int err;
2121
2122 for (i = 0; i < nr_assocs; i++) {
2123 /*
2124 * Adding a handler for an event not in the session,
2125 * just ignore it.
2126 */
2127 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
2128 if (evsel == NULL)
2129 continue;
2130
2131 err = -EEXIST;
2132 if (evsel->handler != NULL)
2133 goto out;
2134 evsel->handler = assocs[i].handler;
2135 }
2136
2137 err = 0;
2138 out:
2139 return err;
2140 }
2141
2142 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused,
2143 union perf_event *event,
2144 struct perf_session *session)
2145 {
2146 struct perf_evlist *evlist = session->evlist;
2147 struct id_index_event *ie = &event->id_index;
2148 size_t i, nr, max_nr;
2149
2150 max_nr = (ie->header.size - sizeof(struct id_index_event)) /
2151 sizeof(struct id_index_entry);
2152 nr = ie->nr;
2153 if (nr > max_nr)
2154 return -EINVAL;
2155
2156 if (dump_trace)
2157 fprintf(stdout, " nr: %zu\n", nr);
2158
2159 for (i = 0; i < nr; i++) {
2160 struct id_index_entry *e = &ie->entries[i];
2161 struct perf_sample_id *sid;
2162
2163 if (dump_trace) {
2164 fprintf(stdout, " ... id: %"PRIu64, e->id);
2165 fprintf(stdout, " idx: %"PRIu64, e->idx);
2166 fprintf(stdout, " cpu: %"PRId64, e->cpu);
2167 fprintf(stdout, " tid: %"PRId64"\n", e->tid);
2168 }
2169
2170 sid = perf_evlist__id2sid(evlist, e->id);
2171 if (!sid)
2172 return -ENOENT;
2173 sid->idx = e->idx;
2174 sid->cpu = e->cpu;
2175 sid->tid = e->tid;
2176 }
2177 return 0;
2178 }
2179
2180 int perf_event__synthesize_id_index(struct perf_tool *tool,
2181 perf_event__handler_t process,
2182 struct perf_evlist *evlist,
2183 struct machine *machine)
2184 {
2185 union perf_event *ev;
2186 struct perf_evsel *evsel;
2187 size_t nr = 0, i = 0, sz, max_nr, n;
2188 int err;
2189
2190 pr_debug2("Synthesizing id index\n");
2191
2192 max_nr = (UINT16_MAX - sizeof(struct id_index_event)) /
2193 sizeof(struct id_index_entry);
2194
2195 evlist__for_each_entry(evlist, evsel)
2196 nr += evsel->ids;
2197
2198 n = nr > max_nr ? max_nr : nr;
2199 sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry);
2200 ev = zalloc(sz);
2201 if (!ev)
2202 return -ENOMEM;
2203
2204 ev->id_index.header.type = PERF_RECORD_ID_INDEX;
2205 ev->id_index.header.size = sz;
2206 ev->id_index.nr = n;
2207
2208 evlist__for_each_entry(evlist, evsel) {
2209 u32 j;
2210
2211 for (j = 0; j < evsel->ids; j++) {
2212 struct id_index_entry *e;
2213 struct perf_sample_id *sid;
2214
2215 if (i >= n) {
2216 err = process(tool, ev, NULL, machine);
2217 if (err)
2218 goto out_err;
2219 nr -= n;
2220 i = 0;
2221 }
2222
2223 e = &ev->id_index.entries[i++];
2224
2225 e->id = evsel->id[j];
2226
2227 sid = perf_evlist__id2sid(evlist, e->id);
2228 if (!sid) {
2229 free(ev);
2230 return -ENOENT;
2231 }
2232
2233 e->idx = sid->idx;
2234 e->cpu = sid->cpu;
2235 e->tid = sid->tid;
2236 }
2237 }
2238
2239 sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry);
2240 ev->id_index.header.size = sz;
2241 ev->id_index.nr = nr;
2242
2243 err = process(tool, ev, NULL, machine);
2244 out_err:
2245 free(ev);
2246
2247 return err;
2248 }
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