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Merge tag 'powerpc-4.5-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
[mirror_ubuntu-zesty-kernel.git] / tools / perf / util / session.c
1 #include <linux/kernel.h>
2 #include <traceevent/event-parse.h>
3
4 #include <byteswap.h>
5 #include <unistd.h>
6 #include <sys/types.h>
7 #include <sys/mman.h>
8
9 #include "evlist.h"
10 #include "evsel.h"
11 #include "session.h"
12 #include "tool.h"
13 #include "sort.h"
14 #include "util.h"
15 #include "cpumap.h"
16 #include "perf_regs.h"
17 #include "asm/bug.h"
18 #include "auxtrace.h"
19 #include "thread-stack.h"
20 #include "stat.h"
21
22 static int perf_session__deliver_event(struct perf_session *session,
23 union perf_event *event,
24 struct perf_sample *sample,
25 struct perf_tool *tool,
26 u64 file_offset);
27
28 static int perf_session__open(struct perf_session *session)
29 {
30 struct perf_data_file *file = session->file;
31
32 if (perf_session__read_header(session) < 0) {
33 pr_err("incompatible file format (rerun with -v to learn more)\n");
34 return -1;
35 }
36
37 if (perf_data_file__is_pipe(file))
38 return 0;
39
40 if (perf_header__has_feat(&session->header, HEADER_STAT))
41 return 0;
42
43 if (!perf_evlist__valid_sample_type(session->evlist)) {
44 pr_err("non matching sample_type\n");
45 return -1;
46 }
47
48 if (!perf_evlist__valid_sample_id_all(session->evlist)) {
49 pr_err("non matching sample_id_all\n");
50 return -1;
51 }
52
53 if (!perf_evlist__valid_read_format(session->evlist)) {
54 pr_err("non matching read_format\n");
55 return -1;
56 }
57
58 return 0;
59 }
60
61 void perf_session__set_id_hdr_size(struct perf_session *session)
62 {
63 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
64
65 machines__set_id_hdr_size(&session->machines, id_hdr_size);
66 }
67
68 int perf_session__create_kernel_maps(struct perf_session *session)
69 {
70 int ret = machine__create_kernel_maps(&session->machines.host);
71
72 if (ret >= 0)
73 ret = machines__create_guest_kernel_maps(&session->machines);
74 return ret;
75 }
76
77 static void perf_session__destroy_kernel_maps(struct perf_session *session)
78 {
79 machines__destroy_kernel_maps(&session->machines);
80 }
81
82 static bool perf_session__has_comm_exec(struct perf_session *session)
83 {
84 struct perf_evsel *evsel;
85
86 evlist__for_each(session->evlist, evsel) {
87 if (evsel->attr.comm_exec)
88 return true;
89 }
90
91 return false;
92 }
93
94 static void perf_session__set_comm_exec(struct perf_session *session)
95 {
96 bool comm_exec = perf_session__has_comm_exec(session);
97
98 machines__set_comm_exec(&session->machines, comm_exec);
99 }
100
101 static int ordered_events__deliver_event(struct ordered_events *oe,
102 struct ordered_event *event)
103 {
104 struct perf_sample sample;
105 struct perf_session *session = container_of(oe, struct perf_session,
106 ordered_events);
107 int ret = perf_evlist__parse_sample(session->evlist, event->event, &sample);
108
109 if (ret) {
110 pr_err("Can't parse sample, err = %d\n", ret);
111 return ret;
112 }
113
114 return perf_session__deliver_event(session, event->event, &sample,
115 session->tool, event->file_offset);
116 }
117
118 struct perf_session *perf_session__new(struct perf_data_file *file,
119 bool repipe, struct perf_tool *tool)
120 {
121 struct perf_session *session = zalloc(sizeof(*session));
122
123 if (!session)
124 goto out;
125
126 session->repipe = repipe;
127 session->tool = tool;
128 INIT_LIST_HEAD(&session->auxtrace_index);
129 machines__init(&session->machines);
130 ordered_events__init(&session->ordered_events, ordered_events__deliver_event);
131
132 if (file) {
133 if (perf_data_file__open(file))
134 goto out_delete;
135
136 session->file = file;
137
138 if (perf_data_file__is_read(file)) {
139 if (perf_session__open(session) < 0)
140 goto out_close;
141
142 perf_session__set_id_hdr_size(session);
143 perf_session__set_comm_exec(session);
144 }
145 } else {
146 session->machines.host.env = &perf_env;
147 }
148
149 if (!file || perf_data_file__is_write(file)) {
150 /*
151 * In O_RDONLY mode this will be performed when reading the
152 * kernel MMAP event, in perf_event__process_mmap().
153 */
154 if (perf_session__create_kernel_maps(session) < 0)
155 pr_warning("Cannot read kernel map\n");
156 }
157
158 if (tool && tool->ordering_requires_timestamps &&
159 tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) {
160 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
161 tool->ordered_events = false;
162 }
163
164 return session;
165
166 out_close:
167 perf_data_file__close(file);
168 out_delete:
169 perf_session__delete(session);
170 out:
171 return NULL;
172 }
173
174 static void perf_session__delete_threads(struct perf_session *session)
175 {
176 machine__delete_threads(&session->machines.host);
177 }
178
179 void perf_session__delete(struct perf_session *session)
180 {
181 auxtrace__free(session);
182 auxtrace_index__free(&session->auxtrace_index);
183 perf_session__destroy_kernel_maps(session);
184 perf_session__delete_threads(session);
185 perf_env__exit(&session->header.env);
186 machines__exit(&session->machines);
187 if (session->file)
188 perf_data_file__close(session->file);
189 free(session);
190 }
191
192 static int process_event_synth_tracing_data_stub(struct perf_tool *tool
193 __maybe_unused,
194 union perf_event *event
195 __maybe_unused,
196 struct perf_session *session
197 __maybe_unused)
198 {
199 dump_printf(": unhandled!\n");
200 return 0;
201 }
202
203 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
204 union perf_event *event __maybe_unused,
205 struct perf_evlist **pevlist
206 __maybe_unused)
207 {
208 dump_printf(": unhandled!\n");
209 return 0;
210 }
211
212 static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused,
213 union perf_event *event __maybe_unused,
214 struct perf_evlist **pevlist
215 __maybe_unused)
216 {
217 if (dump_trace)
218 perf_event__fprintf_event_update(event, stdout);
219
220 dump_printf(": unhandled!\n");
221 return 0;
222 }
223
224 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
225 union perf_event *event __maybe_unused,
226 struct perf_sample *sample __maybe_unused,
227 struct perf_evsel *evsel __maybe_unused,
228 struct machine *machine __maybe_unused)
229 {
230 dump_printf(": unhandled!\n");
231 return 0;
232 }
233
234 static int process_event_stub(struct perf_tool *tool __maybe_unused,
235 union perf_event *event __maybe_unused,
236 struct perf_sample *sample __maybe_unused,
237 struct machine *machine __maybe_unused)
238 {
239 dump_printf(": unhandled!\n");
240 return 0;
241 }
242
243 static int process_build_id_stub(struct perf_tool *tool __maybe_unused,
244 union perf_event *event __maybe_unused,
245 struct perf_session *session __maybe_unused)
246 {
247 dump_printf(": unhandled!\n");
248 return 0;
249 }
250
251 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
252 union perf_event *event __maybe_unused,
253 struct ordered_events *oe __maybe_unused)
254 {
255 dump_printf(": unhandled!\n");
256 return 0;
257 }
258
259 static int process_finished_round(struct perf_tool *tool,
260 union perf_event *event,
261 struct ordered_events *oe);
262
263 static int process_id_index_stub(struct perf_tool *tool __maybe_unused,
264 union perf_event *event __maybe_unused,
265 struct perf_session *perf_session
266 __maybe_unused)
267 {
268 dump_printf(": unhandled!\n");
269 return 0;
270 }
271
272 static int process_event_auxtrace_info_stub(struct perf_tool *tool __maybe_unused,
273 union perf_event *event __maybe_unused,
274 struct perf_session *session __maybe_unused)
275 {
276 dump_printf(": unhandled!\n");
277 return 0;
278 }
279
280 static int skipn(int fd, off_t n)
281 {
282 char buf[4096];
283 ssize_t ret;
284
285 while (n > 0) {
286 ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
287 if (ret <= 0)
288 return ret;
289 n -= ret;
290 }
291
292 return 0;
293 }
294
295 static s64 process_event_auxtrace_stub(struct perf_tool *tool __maybe_unused,
296 union perf_event *event,
297 struct perf_session *session
298 __maybe_unused)
299 {
300 dump_printf(": unhandled!\n");
301 if (perf_data_file__is_pipe(session->file))
302 skipn(perf_data_file__fd(session->file), event->auxtrace.size);
303 return event->auxtrace.size;
304 }
305
306 static
307 int process_event_auxtrace_error_stub(struct perf_tool *tool __maybe_unused,
308 union perf_event *event __maybe_unused,
309 struct perf_session *session __maybe_unused)
310 {
311 dump_printf(": unhandled!\n");
312 return 0;
313 }
314
315
316 static
317 int process_event_thread_map_stub(struct perf_tool *tool __maybe_unused,
318 union perf_event *event __maybe_unused,
319 struct perf_session *session __maybe_unused)
320 {
321 if (dump_trace)
322 perf_event__fprintf_thread_map(event, stdout);
323
324 dump_printf(": unhandled!\n");
325 return 0;
326 }
327
328 static
329 int process_event_cpu_map_stub(struct perf_tool *tool __maybe_unused,
330 union perf_event *event __maybe_unused,
331 struct perf_session *session __maybe_unused)
332 {
333 if (dump_trace)
334 perf_event__fprintf_cpu_map(event, stdout);
335
336 dump_printf(": unhandled!\n");
337 return 0;
338 }
339
340 static
341 int process_event_stat_config_stub(struct perf_tool *tool __maybe_unused,
342 union perf_event *event __maybe_unused,
343 struct perf_session *session __maybe_unused)
344 {
345 if (dump_trace)
346 perf_event__fprintf_stat_config(event, stdout);
347
348 dump_printf(": unhandled!\n");
349 return 0;
350 }
351
352 static int process_stat_stub(struct perf_tool *tool __maybe_unused,
353 union perf_event *event __maybe_unused,
354 struct perf_session *perf_session
355 __maybe_unused)
356 {
357 if (dump_trace)
358 perf_event__fprintf_stat(event, stdout);
359
360 dump_printf(": unhandled!\n");
361 return 0;
362 }
363
364 static int process_stat_round_stub(struct perf_tool *tool __maybe_unused,
365 union perf_event *event __maybe_unused,
366 struct perf_session *perf_session
367 __maybe_unused)
368 {
369 if (dump_trace)
370 perf_event__fprintf_stat_round(event, stdout);
371
372 dump_printf(": unhandled!\n");
373 return 0;
374 }
375
376 void perf_tool__fill_defaults(struct perf_tool *tool)
377 {
378 if (tool->sample == NULL)
379 tool->sample = process_event_sample_stub;
380 if (tool->mmap == NULL)
381 tool->mmap = process_event_stub;
382 if (tool->mmap2 == NULL)
383 tool->mmap2 = process_event_stub;
384 if (tool->comm == NULL)
385 tool->comm = process_event_stub;
386 if (tool->fork == NULL)
387 tool->fork = process_event_stub;
388 if (tool->exit == NULL)
389 tool->exit = process_event_stub;
390 if (tool->lost == NULL)
391 tool->lost = perf_event__process_lost;
392 if (tool->lost_samples == NULL)
393 tool->lost_samples = perf_event__process_lost_samples;
394 if (tool->aux == NULL)
395 tool->aux = perf_event__process_aux;
396 if (tool->itrace_start == NULL)
397 tool->itrace_start = perf_event__process_itrace_start;
398 if (tool->context_switch == NULL)
399 tool->context_switch = perf_event__process_switch;
400 if (tool->read == NULL)
401 tool->read = process_event_sample_stub;
402 if (tool->throttle == NULL)
403 tool->throttle = process_event_stub;
404 if (tool->unthrottle == NULL)
405 tool->unthrottle = process_event_stub;
406 if (tool->attr == NULL)
407 tool->attr = process_event_synth_attr_stub;
408 if (tool->event_update == NULL)
409 tool->event_update = process_event_synth_event_update_stub;
410 if (tool->tracing_data == NULL)
411 tool->tracing_data = process_event_synth_tracing_data_stub;
412 if (tool->build_id == NULL)
413 tool->build_id = process_build_id_stub;
414 if (tool->finished_round == NULL) {
415 if (tool->ordered_events)
416 tool->finished_round = process_finished_round;
417 else
418 tool->finished_round = process_finished_round_stub;
419 }
420 if (tool->id_index == NULL)
421 tool->id_index = process_id_index_stub;
422 if (tool->auxtrace_info == NULL)
423 tool->auxtrace_info = process_event_auxtrace_info_stub;
424 if (tool->auxtrace == NULL)
425 tool->auxtrace = process_event_auxtrace_stub;
426 if (tool->auxtrace_error == NULL)
427 tool->auxtrace_error = process_event_auxtrace_error_stub;
428 if (tool->thread_map == NULL)
429 tool->thread_map = process_event_thread_map_stub;
430 if (tool->cpu_map == NULL)
431 tool->cpu_map = process_event_cpu_map_stub;
432 if (tool->stat_config == NULL)
433 tool->stat_config = process_event_stat_config_stub;
434 if (tool->stat == NULL)
435 tool->stat = process_stat_stub;
436 if (tool->stat_round == NULL)
437 tool->stat_round = process_stat_round_stub;
438 }
439
440 static void swap_sample_id_all(union perf_event *event, void *data)
441 {
442 void *end = (void *) event + event->header.size;
443 int size = end - data;
444
445 BUG_ON(size % sizeof(u64));
446 mem_bswap_64(data, size);
447 }
448
449 static void perf_event__all64_swap(union perf_event *event,
450 bool sample_id_all __maybe_unused)
451 {
452 struct perf_event_header *hdr = &event->header;
453 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
454 }
455
456 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
457 {
458 event->comm.pid = bswap_32(event->comm.pid);
459 event->comm.tid = bswap_32(event->comm.tid);
460
461 if (sample_id_all) {
462 void *data = &event->comm.comm;
463
464 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
465 swap_sample_id_all(event, data);
466 }
467 }
468
469 static void perf_event__mmap_swap(union perf_event *event,
470 bool sample_id_all)
471 {
472 event->mmap.pid = bswap_32(event->mmap.pid);
473 event->mmap.tid = bswap_32(event->mmap.tid);
474 event->mmap.start = bswap_64(event->mmap.start);
475 event->mmap.len = bswap_64(event->mmap.len);
476 event->mmap.pgoff = bswap_64(event->mmap.pgoff);
477
478 if (sample_id_all) {
479 void *data = &event->mmap.filename;
480
481 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
482 swap_sample_id_all(event, data);
483 }
484 }
485
486 static void perf_event__mmap2_swap(union perf_event *event,
487 bool sample_id_all)
488 {
489 event->mmap2.pid = bswap_32(event->mmap2.pid);
490 event->mmap2.tid = bswap_32(event->mmap2.tid);
491 event->mmap2.start = bswap_64(event->mmap2.start);
492 event->mmap2.len = bswap_64(event->mmap2.len);
493 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
494 event->mmap2.maj = bswap_32(event->mmap2.maj);
495 event->mmap2.min = bswap_32(event->mmap2.min);
496 event->mmap2.ino = bswap_64(event->mmap2.ino);
497
498 if (sample_id_all) {
499 void *data = &event->mmap2.filename;
500
501 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
502 swap_sample_id_all(event, data);
503 }
504 }
505 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
506 {
507 event->fork.pid = bswap_32(event->fork.pid);
508 event->fork.tid = bswap_32(event->fork.tid);
509 event->fork.ppid = bswap_32(event->fork.ppid);
510 event->fork.ptid = bswap_32(event->fork.ptid);
511 event->fork.time = bswap_64(event->fork.time);
512
513 if (sample_id_all)
514 swap_sample_id_all(event, &event->fork + 1);
515 }
516
517 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
518 {
519 event->read.pid = bswap_32(event->read.pid);
520 event->read.tid = bswap_32(event->read.tid);
521 event->read.value = bswap_64(event->read.value);
522 event->read.time_enabled = bswap_64(event->read.time_enabled);
523 event->read.time_running = bswap_64(event->read.time_running);
524 event->read.id = bswap_64(event->read.id);
525
526 if (sample_id_all)
527 swap_sample_id_all(event, &event->read + 1);
528 }
529
530 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
531 {
532 event->aux.aux_offset = bswap_64(event->aux.aux_offset);
533 event->aux.aux_size = bswap_64(event->aux.aux_size);
534 event->aux.flags = bswap_64(event->aux.flags);
535
536 if (sample_id_all)
537 swap_sample_id_all(event, &event->aux + 1);
538 }
539
540 static void perf_event__itrace_start_swap(union perf_event *event,
541 bool sample_id_all)
542 {
543 event->itrace_start.pid = bswap_32(event->itrace_start.pid);
544 event->itrace_start.tid = bswap_32(event->itrace_start.tid);
545
546 if (sample_id_all)
547 swap_sample_id_all(event, &event->itrace_start + 1);
548 }
549
550 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
551 {
552 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
553 event->context_switch.next_prev_pid =
554 bswap_32(event->context_switch.next_prev_pid);
555 event->context_switch.next_prev_tid =
556 bswap_32(event->context_switch.next_prev_tid);
557 }
558
559 if (sample_id_all)
560 swap_sample_id_all(event, &event->context_switch + 1);
561 }
562
563 static void perf_event__throttle_swap(union perf_event *event,
564 bool sample_id_all)
565 {
566 event->throttle.time = bswap_64(event->throttle.time);
567 event->throttle.id = bswap_64(event->throttle.id);
568 event->throttle.stream_id = bswap_64(event->throttle.stream_id);
569
570 if (sample_id_all)
571 swap_sample_id_all(event, &event->throttle + 1);
572 }
573
574 static u8 revbyte(u8 b)
575 {
576 int rev = (b >> 4) | ((b & 0xf) << 4);
577 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
578 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
579 return (u8) rev;
580 }
581
582 /*
583 * XXX this is hack in attempt to carry flags bitfield
584 * throught endian village. ABI says:
585 *
586 * Bit-fields are allocated from right to left (least to most significant)
587 * on little-endian implementations and from left to right (most to least
588 * significant) on big-endian implementations.
589 *
590 * The above seems to be byte specific, so we need to reverse each
591 * byte of the bitfield. 'Internet' also says this might be implementation
592 * specific and we probably need proper fix and carry perf_event_attr
593 * bitfield flags in separate data file FEAT_ section. Thought this seems
594 * to work for now.
595 */
596 static void swap_bitfield(u8 *p, unsigned len)
597 {
598 unsigned i;
599
600 for (i = 0; i < len; i++) {
601 *p = revbyte(*p);
602 p++;
603 }
604 }
605
606 /* exported for swapping attributes in file header */
607 void perf_event__attr_swap(struct perf_event_attr *attr)
608 {
609 attr->type = bswap_32(attr->type);
610 attr->size = bswap_32(attr->size);
611
612 #define bswap_safe(f, n) \
613 (attr->size > (offsetof(struct perf_event_attr, f) + \
614 sizeof(attr->f) * (n)))
615 #define bswap_field(f, sz) \
616 do { \
617 if (bswap_safe(f, 0)) \
618 attr->f = bswap_##sz(attr->f); \
619 } while(0)
620 #define bswap_field_32(f) bswap_field(f, 32)
621 #define bswap_field_64(f) bswap_field(f, 64)
622
623 bswap_field_64(config);
624 bswap_field_64(sample_period);
625 bswap_field_64(sample_type);
626 bswap_field_64(read_format);
627 bswap_field_32(wakeup_events);
628 bswap_field_32(bp_type);
629 bswap_field_64(bp_addr);
630 bswap_field_64(bp_len);
631 bswap_field_64(branch_sample_type);
632 bswap_field_64(sample_regs_user);
633 bswap_field_32(sample_stack_user);
634 bswap_field_32(aux_watermark);
635
636 /*
637 * After read_format are bitfields. Check read_format because
638 * we are unable to use offsetof on bitfield.
639 */
640 if (bswap_safe(read_format, 1))
641 swap_bitfield((u8 *) (&attr->read_format + 1),
642 sizeof(u64));
643 #undef bswap_field_64
644 #undef bswap_field_32
645 #undef bswap_field
646 #undef bswap_safe
647 }
648
649 static void perf_event__hdr_attr_swap(union perf_event *event,
650 bool sample_id_all __maybe_unused)
651 {
652 size_t size;
653
654 perf_event__attr_swap(&event->attr.attr);
655
656 size = event->header.size;
657 size -= (void *)&event->attr.id - (void *)event;
658 mem_bswap_64(event->attr.id, size);
659 }
660
661 static void perf_event__event_update_swap(union perf_event *event,
662 bool sample_id_all __maybe_unused)
663 {
664 event->event_update.type = bswap_64(event->event_update.type);
665 event->event_update.id = bswap_64(event->event_update.id);
666 }
667
668 static void perf_event__event_type_swap(union perf_event *event,
669 bool sample_id_all __maybe_unused)
670 {
671 event->event_type.event_type.event_id =
672 bswap_64(event->event_type.event_type.event_id);
673 }
674
675 static void perf_event__tracing_data_swap(union perf_event *event,
676 bool sample_id_all __maybe_unused)
677 {
678 event->tracing_data.size = bswap_32(event->tracing_data.size);
679 }
680
681 static void perf_event__auxtrace_info_swap(union perf_event *event,
682 bool sample_id_all __maybe_unused)
683 {
684 size_t size;
685
686 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
687
688 size = event->header.size;
689 size -= (void *)&event->auxtrace_info.priv - (void *)event;
690 mem_bswap_64(event->auxtrace_info.priv, size);
691 }
692
693 static void perf_event__auxtrace_swap(union perf_event *event,
694 bool sample_id_all __maybe_unused)
695 {
696 event->auxtrace.size = bswap_64(event->auxtrace.size);
697 event->auxtrace.offset = bswap_64(event->auxtrace.offset);
698 event->auxtrace.reference = bswap_64(event->auxtrace.reference);
699 event->auxtrace.idx = bswap_32(event->auxtrace.idx);
700 event->auxtrace.tid = bswap_32(event->auxtrace.tid);
701 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu);
702 }
703
704 static void perf_event__auxtrace_error_swap(union perf_event *event,
705 bool sample_id_all __maybe_unused)
706 {
707 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
708 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
709 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu);
710 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid);
711 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid);
712 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip);
713 }
714
715 static void perf_event__thread_map_swap(union perf_event *event,
716 bool sample_id_all __maybe_unused)
717 {
718 unsigned i;
719
720 event->thread_map.nr = bswap_64(event->thread_map.nr);
721
722 for (i = 0; i < event->thread_map.nr; i++)
723 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
724 }
725
726 static void perf_event__cpu_map_swap(union perf_event *event,
727 bool sample_id_all __maybe_unused)
728 {
729 struct cpu_map_data *data = &event->cpu_map.data;
730 struct cpu_map_entries *cpus;
731 struct cpu_map_mask *mask;
732 unsigned i;
733
734 data->type = bswap_64(data->type);
735
736 switch (data->type) {
737 case PERF_CPU_MAP__CPUS:
738 cpus = (struct cpu_map_entries *)data->data;
739
740 cpus->nr = bswap_16(cpus->nr);
741
742 for (i = 0; i < cpus->nr; i++)
743 cpus->cpu[i] = bswap_16(cpus->cpu[i]);
744 break;
745 case PERF_CPU_MAP__MASK:
746 mask = (struct cpu_map_mask *) data->data;
747
748 mask->nr = bswap_16(mask->nr);
749 mask->long_size = bswap_16(mask->long_size);
750
751 switch (mask->long_size) {
752 case 4: mem_bswap_32(&mask->mask, mask->nr); break;
753 case 8: mem_bswap_64(&mask->mask, mask->nr); break;
754 default:
755 pr_err("cpu_map swap: unsupported long size\n");
756 }
757 default:
758 break;
759 }
760 }
761
762 static void perf_event__stat_config_swap(union perf_event *event,
763 bool sample_id_all __maybe_unused)
764 {
765 u64 size;
766
767 size = event->stat_config.nr * sizeof(event->stat_config.data[0]);
768 size += 1; /* nr item itself */
769 mem_bswap_64(&event->stat_config.nr, size);
770 }
771
772 static void perf_event__stat_swap(union perf_event *event,
773 bool sample_id_all __maybe_unused)
774 {
775 event->stat.id = bswap_64(event->stat.id);
776 event->stat.thread = bswap_32(event->stat.thread);
777 event->stat.cpu = bswap_32(event->stat.cpu);
778 event->stat.val = bswap_64(event->stat.val);
779 event->stat.ena = bswap_64(event->stat.ena);
780 event->stat.run = bswap_64(event->stat.run);
781 }
782
783 static void perf_event__stat_round_swap(union perf_event *event,
784 bool sample_id_all __maybe_unused)
785 {
786 event->stat_round.type = bswap_64(event->stat_round.type);
787 event->stat_round.time = bswap_64(event->stat_round.time);
788 }
789
790 typedef void (*perf_event__swap_op)(union perf_event *event,
791 bool sample_id_all);
792
793 static perf_event__swap_op perf_event__swap_ops[] = {
794 [PERF_RECORD_MMAP] = perf_event__mmap_swap,
795 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap,
796 [PERF_RECORD_COMM] = perf_event__comm_swap,
797 [PERF_RECORD_FORK] = perf_event__task_swap,
798 [PERF_RECORD_EXIT] = perf_event__task_swap,
799 [PERF_RECORD_LOST] = perf_event__all64_swap,
800 [PERF_RECORD_READ] = perf_event__read_swap,
801 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap,
802 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap,
803 [PERF_RECORD_SAMPLE] = perf_event__all64_swap,
804 [PERF_RECORD_AUX] = perf_event__aux_swap,
805 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap,
806 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap,
807 [PERF_RECORD_SWITCH] = perf_event__switch_swap,
808 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap,
809 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
810 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
811 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
812 [PERF_RECORD_HEADER_BUILD_ID] = NULL,
813 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap,
814 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap,
815 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap,
816 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap,
817 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap,
818 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap,
819 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap,
820 [PERF_RECORD_STAT] = perf_event__stat_swap,
821 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap,
822 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_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 (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 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) && !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_TRANSACTION)
1126 printf("... transaction: %" PRIx64 "\n", sample->transaction);
1127
1128 if (sample_type & PERF_SAMPLE_READ)
1129 sample_read__printf(sample, evsel->attr.read_format);
1130 }
1131
1132 static struct machine *machines__find_for_cpumode(struct machines *machines,
1133 union perf_event *event,
1134 struct perf_sample *sample)
1135 {
1136 const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1137 struct machine *machine;
1138
1139 if (perf_guest &&
1140 ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1141 (cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1142 u32 pid;
1143
1144 if (event->header.type == PERF_RECORD_MMAP
1145 || event->header.type == PERF_RECORD_MMAP2)
1146 pid = event->mmap.pid;
1147 else
1148 pid = sample->pid;
1149
1150 machine = machines__find(machines, pid);
1151 if (!machine)
1152 machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID);
1153 return machine;
1154 }
1155
1156 return &machines->host;
1157 }
1158
1159 static int deliver_sample_value(struct perf_evlist *evlist,
1160 struct perf_tool *tool,
1161 union perf_event *event,
1162 struct perf_sample *sample,
1163 struct sample_read_value *v,
1164 struct machine *machine)
1165 {
1166 struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
1167
1168 if (sid) {
1169 sample->id = v->id;
1170 sample->period = v->value - sid->period;
1171 sid->period = v->value;
1172 }
1173
1174 if (!sid || sid->evsel == NULL) {
1175 ++evlist->stats.nr_unknown_id;
1176 return 0;
1177 }
1178
1179 return tool->sample(tool, event, sample, sid->evsel, machine);
1180 }
1181
1182 static int deliver_sample_group(struct perf_evlist *evlist,
1183 struct perf_tool *tool,
1184 union perf_event *event,
1185 struct perf_sample *sample,
1186 struct machine *machine)
1187 {
1188 int ret = -EINVAL;
1189 u64 i;
1190
1191 for (i = 0; i < sample->read.group.nr; i++) {
1192 ret = deliver_sample_value(evlist, tool, event, sample,
1193 &sample->read.group.values[i],
1194 machine);
1195 if (ret)
1196 break;
1197 }
1198
1199 return ret;
1200 }
1201
1202 static int
1203 perf_evlist__deliver_sample(struct perf_evlist *evlist,
1204 struct perf_tool *tool,
1205 union perf_event *event,
1206 struct perf_sample *sample,
1207 struct perf_evsel *evsel,
1208 struct machine *machine)
1209 {
1210 /* We know evsel != NULL. */
1211 u64 sample_type = evsel->attr.sample_type;
1212 u64 read_format = evsel->attr.read_format;
1213
1214 /* Standard sample delievery. */
1215 if (!(sample_type & PERF_SAMPLE_READ))
1216 return tool->sample(tool, event, sample, evsel, machine);
1217
1218 /* For PERF_SAMPLE_READ we have either single or group mode. */
1219 if (read_format & PERF_FORMAT_GROUP)
1220 return deliver_sample_group(evlist, tool, event, sample,
1221 machine);
1222 else
1223 return deliver_sample_value(evlist, tool, event, sample,
1224 &sample->read.one, machine);
1225 }
1226
1227 static int machines__deliver_event(struct machines *machines,
1228 struct perf_evlist *evlist,
1229 union perf_event *event,
1230 struct perf_sample *sample,
1231 struct perf_tool *tool, u64 file_offset)
1232 {
1233 struct perf_evsel *evsel;
1234 struct machine *machine;
1235
1236 dump_event(evlist, event, file_offset, sample);
1237
1238 evsel = perf_evlist__id2evsel(evlist, sample->id);
1239
1240 machine = machines__find_for_cpumode(machines, event, sample);
1241
1242 switch (event->header.type) {
1243 case PERF_RECORD_SAMPLE:
1244 if (evsel == NULL) {
1245 ++evlist->stats.nr_unknown_id;
1246 return 0;
1247 }
1248 dump_sample(evsel, event, sample);
1249 if (machine == NULL) {
1250 ++evlist->stats.nr_unprocessable_samples;
1251 return 0;
1252 }
1253 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1254 case PERF_RECORD_MMAP:
1255 return tool->mmap(tool, event, sample, machine);
1256 case PERF_RECORD_MMAP2:
1257 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1258 ++evlist->stats.nr_proc_map_timeout;
1259 return tool->mmap2(tool, event, sample, machine);
1260 case PERF_RECORD_COMM:
1261 return tool->comm(tool, event, sample, machine);
1262 case PERF_RECORD_FORK:
1263 return tool->fork(tool, event, sample, machine);
1264 case PERF_RECORD_EXIT:
1265 return tool->exit(tool, event, sample, machine);
1266 case PERF_RECORD_LOST:
1267 if (tool->lost == perf_event__process_lost)
1268 evlist->stats.total_lost += event->lost.lost;
1269 return tool->lost(tool, event, sample, machine);
1270 case PERF_RECORD_LOST_SAMPLES:
1271 if (tool->lost_samples == perf_event__process_lost_samples)
1272 evlist->stats.total_lost_samples += event->lost_samples.lost;
1273 return tool->lost_samples(tool, event, sample, machine);
1274 case PERF_RECORD_READ:
1275 return tool->read(tool, event, sample, evsel, machine);
1276 case PERF_RECORD_THROTTLE:
1277 return tool->throttle(tool, event, sample, machine);
1278 case PERF_RECORD_UNTHROTTLE:
1279 return tool->unthrottle(tool, event, sample, machine);
1280 case PERF_RECORD_AUX:
1281 if (tool->aux == perf_event__process_aux &&
1282 (event->aux.flags & PERF_AUX_FLAG_TRUNCATED))
1283 evlist->stats.total_aux_lost += 1;
1284 return tool->aux(tool, event, sample, machine);
1285 case PERF_RECORD_ITRACE_START:
1286 return tool->itrace_start(tool, event, sample, machine);
1287 case PERF_RECORD_SWITCH:
1288 case PERF_RECORD_SWITCH_CPU_WIDE:
1289 return tool->context_switch(tool, event, sample, machine);
1290 default:
1291 ++evlist->stats.nr_unknown_events;
1292 return -1;
1293 }
1294 }
1295
1296 static int perf_session__deliver_event(struct perf_session *session,
1297 union perf_event *event,
1298 struct perf_sample *sample,
1299 struct perf_tool *tool,
1300 u64 file_offset)
1301 {
1302 int ret;
1303
1304 ret = auxtrace__process_event(session, event, sample, tool);
1305 if (ret < 0)
1306 return ret;
1307 if (ret > 0)
1308 return 0;
1309
1310 return machines__deliver_event(&session->machines, session->evlist,
1311 event, sample, tool, file_offset);
1312 }
1313
1314 static s64 perf_session__process_user_event(struct perf_session *session,
1315 union perf_event *event,
1316 u64 file_offset)
1317 {
1318 struct ordered_events *oe = &session->ordered_events;
1319 struct perf_tool *tool = session->tool;
1320 int fd = perf_data_file__fd(session->file);
1321 int err;
1322
1323 dump_event(session->evlist, event, file_offset, NULL);
1324
1325 /* These events are processed right away */
1326 switch (event->header.type) {
1327 case PERF_RECORD_HEADER_ATTR:
1328 err = tool->attr(tool, event, &session->evlist);
1329 if (err == 0) {
1330 perf_session__set_id_hdr_size(session);
1331 perf_session__set_comm_exec(session);
1332 }
1333 return err;
1334 case PERF_RECORD_EVENT_UPDATE:
1335 return tool->event_update(tool, event, &session->evlist);
1336 case PERF_RECORD_HEADER_EVENT_TYPE:
1337 /*
1338 * Depreceated, but we need to handle it for sake
1339 * of old data files create in pipe mode.
1340 */
1341 return 0;
1342 case PERF_RECORD_HEADER_TRACING_DATA:
1343 /* setup for reading amidst mmap */
1344 lseek(fd, file_offset, SEEK_SET);
1345 return tool->tracing_data(tool, event, session);
1346 case PERF_RECORD_HEADER_BUILD_ID:
1347 return tool->build_id(tool, event, session);
1348 case PERF_RECORD_FINISHED_ROUND:
1349 return tool->finished_round(tool, event, oe);
1350 case PERF_RECORD_ID_INDEX:
1351 return tool->id_index(tool, event, session);
1352 case PERF_RECORD_AUXTRACE_INFO:
1353 return tool->auxtrace_info(tool, event, session);
1354 case PERF_RECORD_AUXTRACE:
1355 /* setup for reading amidst mmap */
1356 lseek(fd, file_offset + event->header.size, SEEK_SET);
1357 return tool->auxtrace(tool, event, session);
1358 case PERF_RECORD_AUXTRACE_ERROR:
1359 perf_session__auxtrace_error_inc(session, event);
1360 return tool->auxtrace_error(tool, event, session);
1361 case PERF_RECORD_THREAD_MAP:
1362 return tool->thread_map(tool, event, session);
1363 case PERF_RECORD_CPU_MAP:
1364 return tool->cpu_map(tool, event, session);
1365 case PERF_RECORD_STAT_CONFIG:
1366 return tool->stat_config(tool, event, session);
1367 case PERF_RECORD_STAT:
1368 return tool->stat(tool, event, session);
1369 case PERF_RECORD_STAT_ROUND:
1370 return tool->stat_round(tool, event, session);
1371 default:
1372 return -EINVAL;
1373 }
1374 }
1375
1376 int perf_session__deliver_synth_event(struct perf_session *session,
1377 union perf_event *event,
1378 struct perf_sample *sample)
1379 {
1380 struct perf_evlist *evlist = session->evlist;
1381 struct perf_tool *tool = session->tool;
1382
1383 events_stats__inc(&evlist->stats, event->header.type);
1384
1385 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1386 return perf_session__process_user_event(session, event, 0);
1387
1388 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0);
1389 }
1390
1391 static void event_swap(union perf_event *event, bool sample_id_all)
1392 {
1393 perf_event__swap_op swap;
1394
1395 swap = perf_event__swap_ops[event->header.type];
1396 if (swap)
1397 swap(event, sample_id_all);
1398 }
1399
1400 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1401 void *buf, size_t buf_sz,
1402 union perf_event **event_ptr,
1403 struct perf_sample *sample)
1404 {
1405 union perf_event *event;
1406 size_t hdr_sz, rest;
1407 int fd;
1408
1409 if (session->one_mmap && !session->header.needs_swap) {
1410 event = file_offset - session->one_mmap_offset +
1411 session->one_mmap_addr;
1412 goto out_parse_sample;
1413 }
1414
1415 if (perf_data_file__is_pipe(session->file))
1416 return -1;
1417
1418 fd = perf_data_file__fd(session->file);
1419 hdr_sz = sizeof(struct perf_event_header);
1420
1421 if (buf_sz < hdr_sz)
1422 return -1;
1423
1424 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1425 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1426 return -1;
1427
1428 event = (union perf_event *)buf;
1429
1430 if (session->header.needs_swap)
1431 perf_event_header__bswap(&event->header);
1432
1433 if (event->header.size < hdr_sz || event->header.size > buf_sz)
1434 return -1;
1435
1436 rest = event->header.size - hdr_sz;
1437
1438 if (readn(fd, buf, rest) != (ssize_t)rest)
1439 return -1;
1440
1441 if (session->header.needs_swap)
1442 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1443
1444 out_parse_sample:
1445
1446 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1447 perf_evlist__parse_sample(session->evlist, event, sample))
1448 return -1;
1449
1450 *event_ptr = event;
1451
1452 return 0;
1453 }
1454
1455 static s64 perf_session__process_event(struct perf_session *session,
1456 union perf_event *event, u64 file_offset)
1457 {
1458 struct perf_evlist *evlist = session->evlist;
1459 struct perf_tool *tool = session->tool;
1460 struct perf_sample sample;
1461 int ret;
1462
1463 if (session->header.needs_swap)
1464 event_swap(event, perf_evlist__sample_id_all(evlist));
1465
1466 if (event->header.type >= PERF_RECORD_HEADER_MAX)
1467 return -EINVAL;
1468
1469 events_stats__inc(&evlist->stats, event->header.type);
1470
1471 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1472 return perf_session__process_user_event(session, event, file_offset);
1473
1474 /*
1475 * For all kernel events we get the sample data
1476 */
1477 ret = perf_evlist__parse_sample(evlist, event, &sample);
1478 if (ret)
1479 return ret;
1480
1481 if (tool->ordered_events) {
1482 ret = perf_session__queue_event(session, event, &sample, file_offset);
1483 if (ret != -ETIME)
1484 return ret;
1485 }
1486
1487 return perf_session__deliver_event(session, event, &sample, tool,
1488 file_offset);
1489 }
1490
1491 void perf_event_header__bswap(struct perf_event_header *hdr)
1492 {
1493 hdr->type = bswap_32(hdr->type);
1494 hdr->misc = bswap_16(hdr->misc);
1495 hdr->size = bswap_16(hdr->size);
1496 }
1497
1498 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1499 {
1500 return machine__findnew_thread(&session->machines.host, -1, pid);
1501 }
1502
1503 int perf_session__register_idle_thread(struct perf_session *session)
1504 {
1505 struct thread *thread;
1506 int err = 0;
1507
1508 thread = machine__findnew_thread(&session->machines.host, 0, 0);
1509 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1510 pr_err("problem inserting idle task.\n");
1511 err = -1;
1512 }
1513
1514 /* machine__findnew_thread() got the thread, so put it */
1515 thread__put(thread);
1516 return err;
1517 }
1518
1519 static void perf_session__warn_about_errors(const struct perf_session *session)
1520 {
1521 const struct events_stats *stats = &session->evlist->stats;
1522 const struct ordered_events *oe = &session->ordered_events;
1523
1524 if (session->tool->lost == perf_event__process_lost &&
1525 stats->nr_events[PERF_RECORD_LOST] != 0) {
1526 ui__warning("Processed %d events and lost %d chunks!\n\n"
1527 "Check IO/CPU overload!\n\n",
1528 stats->nr_events[0],
1529 stats->nr_events[PERF_RECORD_LOST]);
1530 }
1531
1532 if (session->tool->lost_samples == perf_event__process_lost_samples) {
1533 double drop_rate;
1534
1535 drop_rate = (double)stats->total_lost_samples /
1536 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1537 if (drop_rate > 0.05) {
1538 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%% samples!\n\n",
1539 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1540 drop_rate * 100.0);
1541 }
1542 }
1543
1544 if (session->tool->aux == perf_event__process_aux &&
1545 stats->total_aux_lost != 0) {
1546 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1547 stats->total_aux_lost,
1548 stats->nr_events[PERF_RECORD_AUX]);
1549 }
1550
1551 if (stats->nr_unknown_events != 0) {
1552 ui__warning("Found %u unknown events!\n\n"
1553 "Is this an older tool processing a perf.data "
1554 "file generated by a more recent tool?\n\n"
1555 "If that is not the case, consider "
1556 "reporting to linux-kernel@vger.kernel.org.\n\n",
1557 stats->nr_unknown_events);
1558 }
1559
1560 if (stats->nr_unknown_id != 0) {
1561 ui__warning("%u samples with id not present in the header\n",
1562 stats->nr_unknown_id);
1563 }
1564
1565 if (stats->nr_invalid_chains != 0) {
1566 ui__warning("Found invalid callchains!\n\n"
1567 "%u out of %u events were discarded for this reason.\n\n"
1568 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1569 stats->nr_invalid_chains,
1570 stats->nr_events[PERF_RECORD_SAMPLE]);
1571 }
1572
1573 if (stats->nr_unprocessable_samples != 0) {
1574 ui__warning("%u unprocessable samples recorded.\n"
1575 "Do you have a KVM guest running and not using 'perf kvm'?\n",
1576 stats->nr_unprocessable_samples);
1577 }
1578
1579 if (oe->nr_unordered_events != 0)
1580 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1581
1582 events_stats__auxtrace_error_warn(stats);
1583
1584 if (stats->nr_proc_map_timeout != 0) {
1585 ui__warning("%d map information files for pre-existing threads were\n"
1586 "not processed, if there are samples for addresses they\n"
1587 "will not be resolved, you may find out which are these\n"
1588 "threads by running with -v and redirecting the output\n"
1589 "to a file.\n"
1590 "The time limit to process proc map is too short?\n"
1591 "Increase it by --proc-map-timeout\n",
1592 stats->nr_proc_map_timeout);
1593 }
1594 }
1595
1596 static int perf_session__flush_thread_stack(struct thread *thread,
1597 void *p __maybe_unused)
1598 {
1599 return thread_stack__flush(thread);
1600 }
1601
1602 static int perf_session__flush_thread_stacks(struct perf_session *session)
1603 {
1604 return machines__for_each_thread(&session->machines,
1605 perf_session__flush_thread_stack,
1606 NULL);
1607 }
1608
1609 volatile int session_done;
1610
1611 static int __perf_session__process_pipe_events(struct perf_session *session)
1612 {
1613 struct ordered_events *oe = &session->ordered_events;
1614 struct perf_tool *tool = session->tool;
1615 int fd = perf_data_file__fd(session->file);
1616 union perf_event *event;
1617 uint32_t size, cur_size = 0;
1618 void *buf = NULL;
1619 s64 skip = 0;
1620 u64 head;
1621 ssize_t err;
1622 void *p;
1623
1624 perf_tool__fill_defaults(tool);
1625
1626 head = 0;
1627 cur_size = sizeof(union perf_event);
1628
1629 buf = malloc(cur_size);
1630 if (!buf)
1631 return -errno;
1632 more:
1633 event = buf;
1634 err = readn(fd, event, sizeof(struct perf_event_header));
1635 if (err <= 0) {
1636 if (err == 0)
1637 goto done;
1638
1639 pr_err("failed to read event header\n");
1640 goto out_err;
1641 }
1642
1643 if (session->header.needs_swap)
1644 perf_event_header__bswap(&event->header);
1645
1646 size = event->header.size;
1647 if (size < sizeof(struct perf_event_header)) {
1648 pr_err("bad event header size\n");
1649 goto out_err;
1650 }
1651
1652 if (size > cur_size) {
1653 void *new = realloc(buf, size);
1654 if (!new) {
1655 pr_err("failed to allocate memory to read event\n");
1656 goto out_err;
1657 }
1658 buf = new;
1659 cur_size = size;
1660 event = buf;
1661 }
1662 p = event;
1663 p += sizeof(struct perf_event_header);
1664
1665 if (size - sizeof(struct perf_event_header)) {
1666 err = readn(fd, p, size - sizeof(struct perf_event_header));
1667 if (err <= 0) {
1668 if (err == 0) {
1669 pr_err("unexpected end of event stream\n");
1670 goto done;
1671 }
1672
1673 pr_err("failed to read event data\n");
1674 goto out_err;
1675 }
1676 }
1677
1678 if ((skip = perf_session__process_event(session, event, head)) < 0) {
1679 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1680 head, event->header.size, event->header.type);
1681 err = -EINVAL;
1682 goto out_err;
1683 }
1684
1685 head += size;
1686
1687 if (skip > 0)
1688 head += skip;
1689
1690 if (!session_done())
1691 goto more;
1692 done:
1693 /* do the final flush for ordered samples */
1694 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1695 if (err)
1696 goto out_err;
1697 err = auxtrace__flush_events(session, tool);
1698 if (err)
1699 goto out_err;
1700 err = perf_session__flush_thread_stacks(session);
1701 out_err:
1702 free(buf);
1703 perf_session__warn_about_errors(session);
1704 ordered_events__free(&session->ordered_events);
1705 auxtrace__free_events(session);
1706 return err;
1707 }
1708
1709 static union perf_event *
1710 fetch_mmaped_event(struct perf_session *session,
1711 u64 head, size_t mmap_size, char *buf)
1712 {
1713 union perf_event *event;
1714
1715 /*
1716 * Ensure we have enough space remaining to read
1717 * the size of the event in the headers.
1718 */
1719 if (head + sizeof(event->header) > mmap_size)
1720 return NULL;
1721
1722 event = (union perf_event *)(buf + head);
1723
1724 if (session->header.needs_swap)
1725 perf_event_header__bswap(&event->header);
1726
1727 if (head + event->header.size > mmap_size) {
1728 /* We're not fetching the event so swap back again */
1729 if (session->header.needs_swap)
1730 perf_event_header__bswap(&event->header);
1731 return NULL;
1732 }
1733
1734 return event;
1735 }
1736
1737 /*
1738 * On 64bit we can mmap the data file in one go. No need for tiny mmap
1739 * slices. On 32bit we use 32MB.
1740 */
1741 #if BITS_PER_LONG == 64
1742 #define MMAP_SIZE ULLONG_MAX
1743 #define NUM_MMAPS 1
1744 #else
1745 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1746 #define NUM_MMAPS 128
1747 #endif
1748
1749 static int __perf_session__process_events(struct perf_session *session,
1750 u64 data_offset, u64 data_size,
1751 u64 file_size)
1752 {
1753 struct ordered_events *oe = &session->ordered_events;
1754 struct perf_tool *tool = session->tool;
1755 int fd = perf_data_file__fd(session->file);
1756 u64 head, page_offset, file_offset, file_pos, size;
1757 int err, mmap_prot, mmap_flags, map_idx = 0;
1758 size_t mmap_size;
1759 char *buf, *mmaps[NUM_MMAPS];
1760 union perf_event *event;
1761 struct ui_progress prog;
1762 s64 skip;
1763
1764 perf_tool__fill_defaults(tool);
1765
1766 page_offset = page_size * (data_offset / page_size);
1767 file_offset = page_offset;
1768 head = data_offset - page_offset;
1769
1770 if (data_size == 0)
1771 goto out;
1772
1773 if (data_offset + data_size < file_size)
1774 file_size = data_offset + data_size;
1775
1776 ui_progress__init(&prog, file_size, "Processing events...");
1777
1778 mmap_size = MMAP_SIZE;
1779 if (mmap_size > file_size) {
1780 mmap_size = file_size;
1781 session->one_mmap = true;
1782 }
1783
1784 memset(mmaps, 0, sizeof(mmaps));
1785
1786 mmap_prot = PROT_READ;
1787 mmap_flags = MAP_SHARED;
1788
1789 if (session->header.needs_swap) {
1790 mmap_prot |= PROT_WRITE;
1791 mmap_flags = MAP_PRIVATE;
1792 }
1793 remap:
1794 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1795 file_offset);
1796 if (buf == MAP_FAILED) {
1797 pr_err("failed to mmap file\n");
1798 err = -errno;
1799 goto out_err;
1800 }
1801 mmaps[map_idx] = buf;
1802 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1803 file_pos = file_offset + head;
1804 if (session->one_mmap) {
1805 session->one_mmap_addr = buf;
1806 session->one_mmap_offset = file_offset;
1807 }
1808
1809 more:
1810 event = fetch_mmaped_event(session, head, mmap_size, buf);
1811 if (!event) {
1812 if (mmaps[map_idx]) {
1813 munmap(mmaps[map_idx], mmap_size);
1814 mmaps[map_idx] = NULL;
1815 }
1816
1817 page_offset = page_size * (head / page_size);
1818 file_offset += page_offset;
1819 head -= page_offset;
1820 goto remap;
1821 }
1822
1823 size = event->header.size;
1824
1825 if (size < sizeof(struct perf_event_header) ||
1826 (skip = perf_session__process_event(session, event, file_pos)) < 0) {
1827 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1828 file_offset + head, event->header.size,
1829 event->header.type);
1830 err = -EINVAL;
1831 goto out_err;
1832 }
1833
1834 if (skip)
1835 size += skip;
1836
1837 head += size;
1838 file_pos += size;
1839
1840 ui_progress__update(&prog, size);
1841
1842 if (session_done())
1843 goto out;
1844
1845 if (file_pos < file_size)
1846 goto more;
1847
1848 out:
1849 /* do the final flush for ordered samples */
1850 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1851 if (err)
1852 goto out_err;
1853 err = auxtrace__flush_events(session, tool);
1854 if (err)
1855 goto out_err;
1856 err = perf_session__flush_thread_stacks(session);
1857 out_err:
1858 ui_progress__finish();
1859 perf_session__warn_about_errors(session);
1860 ordered_events__free(&session->ordered_events);
1861 auxtrace__free_events(session);
1862 session->one_mmap = false;
1863 return err;
1864 }
1865
1866 int perf_session__process_events(struct perf_session *session)
1867 {
1868 u64 size = perf_data_file__size(session->file);
1869 int err;
1870
1871 if (perf_session__register_idle_thread(session) < 0)
1872 return -ENOMEM;
1873
1874 if (!perf_data_file__is_pipe(session->file))
1875 err = __perf_session__process_events(session,
1876 session->header.data_offset,
1877 session->header.data_size, size);
1878 else
1879 err = __perf_session__process_pipe_events(session);
1880
1881 return err;
1882 }
1883
1884 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1885 {
1886 struct perf_evsel *evsel;
1887
1888 evlist__for_each(session->evlist, evsel) {
1889 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1890 return true;
1891 }
1892
1893 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1894 return false;
1895 }
1896
1897 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1898 const char *symbol_name, u64 addr)
1899 {
1900 char *bracket;
1901 enum map_type i;
1902 struct ref_reloc_sym *ref;
1903
1904 ref = zalloc(sizeof(struct ref_reloc_sym));
1905 if (ref == NULL)
1906 return -ENOMEM;
1907
1908 ref->name = strdup(symbol_name);
1909 if (ref->name == NULL) {
1910 free(ref);
1911 return -ENOMEM;
1912 }
1913
1914 bracket = strchr(ref->name, ']');
1915 if (bracket)
1916 *bracket = '\0';
1917
1918 ref->addr = addr;
1919
1920 for (i = 0; i < MAP__NR_TYPES; ++i) {
1921 struct kmap *kmap = map__kmap(maps[i]);
1922
1923 if (!kmap)
1924 continue;
1925 kmap->ref_reloc_sym = ref;
1926 }
1927
1928 return 0;
1929 }
1930
1931 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
1932 {
1933 return machines__fprintf_dsos(&session->machines, fp);
1934 }
1935
1936 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
1937 bool (skip)(struct dso *dso, int parm), int parm)
1938 {
1939 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
1940 }
1941
1942 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1943 {
1944 size_t ret;
1945 const char *msg = "";
1946
1947 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
1948 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
1949
1950 ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
1951
1952 ret += events_stats__fprintf(&session->evlist->stats, fp);
1953 return ret;
1954 }
1955
1956 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1957 {
1958 /*
1959 * FIXME: Here we have to actually print all the machines in this
1960 * session, not just the host...
1961 */
1962 return machine__fprintf(&session->machines.host, fp);
1963 }
1964
1965 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1966 unsigned int type)
1967 {
1968 struct perf_evsel *pos;
1969
1970 evlist__for_each(session->evlist, pos) {
1971 if (pos->attr.type == type)
1972 return pos;
1973 }
1974 return NULL;
1975 }
1976
1977 void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample,
1978 struct addr_location *al,
1979 unsigned int print_opts, unsigned int stack_depth)
1980 {
1981 struct callchain_cursor_node *node;
1982 int print_ip = print_opts & PRINT_IP_OPT_IP;
1983 int print_sym = print_opts & PRINT_IP_OPT_SYM;
1984 int print_dso = print_opts & PRINT_IP_OPT_DSO;
1985 int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET;
1986 int print_oneline = print_opts & PRINT_IP_OPT_ONELINE;
1987 int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE;
1988 char s = print_oneline ? ' ' : '\t';
1989
1990 if (symbol_conf.use_callchain && sample->callchain) {
1991 struct addr_location node_al;
1992
1993 if (thread__resolve_callchain(al->thread, evsel,
1994 sample, NULL, NULL,
1995 stack_depth) != 0) {
1996 if (verbose)
1997 error("Failed to resolve callchain. Skipping\n");
1998 return;
1999 }
2000 callchain_cursor_commit(&callchain_cursor);
2001
2002 if (print_symoffset)
2003 node_al = *al;
2004
2005 while (stack_depth) {
2006 u64 addr = 0;
2007
2008 node = callchain_cursor_current(&callchain_cursor);
2009 if (!node)
2010 break;
2011
2012 if (node->sym && node->sym->ignore)
2013 goto next;
2014
2015 if (print_ip)
2016 printf("%c%16" PRIx64, s, node->ip);
2017
2018 if (node->map)
2019 addr = node->map->map_ip(node->map, node->ip);
2020
2021 if (print_sym) {
2022 printf(" ");
2023 if (print_symoffset) {
2024 node_al.addr = addr;
2025 node_al.map = node->map;
2026 symbol__fprintf_symname_offs(node->sym, &node_al, stdout);
2027 } else
2028 symbol__fprintf_symname(node->sym, stdout);
2029 }
2030
2031 if (print_dso) {
2032 printf(" (");
2033 map__fprintf_dsoname(node->map, stdout);
2034 printf(")");
2035 }
2036
2037 if (print_srcline)
2038 map__fprintf_srcline(node->map, addr, "\n ",
2039 stdout);
2040
2041 if (!print_oneline)
2042 printf("\n");
2043
2044 stack_depth--;
2045 next:
2046 callchain_cursor_advance(&callchain_cursor);
2047 }
2048
2049 } else {
2050 if (al->sym && al->sym->ignore)
2051 return;
2052
2053 if (print_ip)
2054 printf("%16" PRIx64, sample->ip);
2055
2056 if (print_sym) {
2057 printf(" ");
2058 if (print_symoffset)
2059 symbol__fprintf_symname_offs(al->sym, al,
2060 stdout);
2061 else
2062 symbol__fprintf_symname(al->sym, stdout);
2063 }
2064
2065 if (print_dso) {
2066 printf(" (");
2067 map__fprintf_dsoname(al->map, stdout);
2068 printf(")");
2069 }
2070
2071 if (print_srcline)
2072 map__fprintf_srcline(al->map, al->addr, "\n ", stdout);
2073 }
2074 }
2075
2076 int perf_session__cpu_bitmap(struct perf_session *session,
2077 const char *cpu_list, unsigned long *cpu_bitmap)
2078 {
2079 int i, err = -1;
2080 struct cpu_map *map;
2081
2082 for (i = 0; i < PERF_TYPE_MAX; ++i) {
2083 struct perf_evsel *evsel;
2084
2085 evsel = perf_session__find_first_evtype(session, i);
2086 if (!evsel)
2087 continue;
2088
2089 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
2090 pr_err("File does not contain CPU events. "
2091 "Remove -c option to proceed.\n");
2092 return -1;
2093 }
2094 }
2095
2096 map = cpu_map__new(cpu_list);
2097 if (map == NULL) {
2098 pr_err("Invalid cpu_list\n");
2099 return -1;
2100 }
2101
2102 for (i = 0; i < map->nr; i++) {
2103 int cpu = map->map[i];
2104
2105 if (cpu >= MAX_NR_CPUS) {
2106 pr_err("Requested CPU %d too large. "
2107 "Consider raising MAX_NR_CPUS\n", cpu);
2108 goto out_delete_map;
2109 }
2110
2111 set_bit(cpu, cpu_bitmap);
2112 }
2113
2114 err = 0;
2115
2116 out_delete_map:
2117 cpu_map__put(map);
2118 return err;
2119 }
2120
2121 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
2122 bool full)
2123 {
2124 struct stat st;
2125 int fd, ret;
2126
2127 if (session == NULL || fp == NULL)
2128 return;
2129
2130 fd = perf_data_file__fd(session->file);
2131
2132 ret = fstat(fd, &st);
2133 if (ret == -1)
2134 return;
2135
2136 fprintf(fp, "# ========\n");
2137 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
2138 perf_header__fprintf_info(session, fp, full);
2139 fprintf(fp, "# ========\n#\n");
2140 }
2141
2142
2143 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
2144 const struct perf_evsel_str_handler *assocs,
2145 size_t nr_assocs)
2146 {
2147 struct perf_evsel *evsel;
2148 size_t i;
2149 int err;
2150
2151 for (i = 0; i < nr_assocs; i++) {
2152 /*
2153 * Adding a handler for an event not in the session,
2154 * just ignore it.
2155 */
2156 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
2157 if (evsel == NULL)
2158 continue;
2159
2160 err = -EEXIST;
2161 if (evsel->handler != NULL)
2162 goto out;
2163 evsel->handler = assocs[i].handler;
2164 }
2165
2166 err = 0;
2167 out:
2168 return err;
2169 }
2170
2171 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused,
2172 union perf_event *event,
2173 struct perf_session *session)
2174 {
2175 struct perf_evlist *evlist = session->evlist;
2176 struct id_index_event *ie = &event->id_index;
2177 size_t i, nr, max_nr;
2178
2179 max_nr = (ie->header.size - sizeof(struct id_index_event)) /
2180 sizeof(struct id_index_entry);
2181 nr = ie->nr;
2182 if (nr > max_nr)
2183 return -EINVAL;
2184
2185 if (dump_trace)
2186 fprintf(stdout, " nr: %zu\n", nr);
2187
2188 for (i = 0; i < nr; i++) {
2189 struct id_index_entry *e = &ie->entries[i];
2190 struct perf_sample_id *sid;
2191
2192 if (dump_trace) {
2193 fprintf(stdout, " ... id: %"PRIu64, e->id);
2194 fprintf(stdout, " idx: %"PRIu64, e->idx);
2195 fprintf(stdout, " cpu: %"PRId64, e->cpu);
2196 fprintf(stdout, " tid: %"PRId64"\n", e->tid);
2197 }
2198
2199 sid = perf_evlist__id2sid(evlist, e->id);
2200 if (!sid)
2201 return -ENOENT;
2202 sid->idx = e->idx;
2203 sid->cpu = e->cpu;
2204 sid->tid = e->tid;
2205 }
2206 return 0;
2207 }
2208
2209 int perf_event__synthesize_id_index(struct perf_tool *tool,
2210 perf_event__handler_t process,
2211 struct perf_evlist *evlist,
2212 struct machine *machine)
2213 {
2214 union perf_event *ev;
2215 struct perf_evsel *evsel;
2216 size_t nr = 0, i = 0, sz, max_nr, n;
2217 int err;
2218
2219 pr_debug2("Synthesizing id index\n");
2220
2221 max_nr = (UINT16_MAX - sizeof(struct id_index_event)) /
2222 sizeof(struct id_index_entry);
2223
2224 evlist__for_each(evlist, evsel)
2225 nr += evsel->ids;
2226
2227 n = nr > max_nr ? max_nr : nr;
2228 sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry);
2229 ev = zalloc(sz);
2230 if (!ev)
2231 return -ENOMEM;
2232
2233 ev->id_index.header.type = PERF_RECORD_ID_INDEX;
2234 ev->id_index.header.size = sz;
2235 ev->id_index.nr = n;
2236
2237 evlist__for_each(evlist, evsel) {
2238 u32 j;
2239
2240 for (j = 0; j < evsel->ids; j++) {
2241 struct id_index_entry *e;
2242 struct perf_sample_id *sid;
2243
2244 if (i >= n) {
2245 err = process(tool, ev, NULL, machine);
2246 if (err)
2247 goto out_err;
2248 nr -= n;
2249 i = 0;
2250 }
2251
2252 e = &ev->id_index.entries[i++];
2253
2254 e->id = evsel->id[j];
2255
2256 sid = perf_evlist__id2sid(evlist, e->id);
2257 if (!sid) {
2258 free(ev);
2259 return -ENOENT;
2260 }
2261
2262 e->idx = sid->idx;
2263 e->cpu = sid->cpu;
2264 e->tid = sid->tid;
2265 }
2266 }
2267
2268 sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry);
2269 ev->id_index.header.size = sz;
2270 ev->id_index.nr = nr;
2271
2272 err = process(tool, ev, NULL, machine);
2273 out_err:
2274 free(ev);
2275
2276 return err;
2277 }
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