projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[deliverable/linux.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_finished_round_stub(struct perf_tool *tool __maybe_unused,
244 union perf_event *event __maybe_unused,
245 struct ordered_events *oe __maybe_unused)
246 {
247 dump_printf(": unhandled!\n");
248 return 0;
249 }
250
251 static int process_finished_round(struct perf_tool *tool,
252 union perf_event *event,
253 struct ordered_events *oe);
254
255 static int skipn(int fd, off_t n)
256 {
257 char buf[4096];
258 ssize_t ret;
259
260 while (n > 0) {
261 ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
262 if (ret <= 0)
263 return ret;
264 n -= ret;
265 }
266
267 return 0;
268 }
269
270 static s64 process_event_auxtrace_stub(struct perf_tool *tool __maybe_unused,
271 union perf_event *event,
272 struct perf_session *session
273 __maybe_unused)
274 {
275 dump_printf(": unhandled!\n");
276 if (perf_data_file__is_pipe(session->file))
277 skipn(perf_data_file__fd(session->file), event->auxtrace.size);
278 return event->auxtrace.size;
279 }
280
281 static int process_event_op2_stub(struct perf_tool *tool __maybe_unused,
282 union perf_event *event __maybe_unused,
283 struct perf_session *session __maybe_unused)
284 {
285 dump_printf(": unhandled!\n");
286 return 0;
287 }
288
289
290 static
291 int process_event_thread_map_stub(struct perf_tool *tool __maybe_unused,
292 union perf_event *event __maybe_unused,
293 struct perf_session *session __maybe_unused)
294 {
295 if (dump_trace)
296 perf_event__fprintf_thread_map(event, stdout);
297
298 dump_printf(": unhandled!\n");
299 return 0;
300 }
301
302 static
303 int process_event_cpu_map_stub(struct perf_tool *tool __maybe_unused,
304 union perf_event *event __maybe_unused,
305 struct perf_session *session __maybe_unused)
306 {
307 if (dump_trace)
308 perf_event__fprintf_cpu_map(event, stdout);
309
310 dump_printf(": unhandled!\n");
311 return 0;
312 }
313
314 static
315 int process_event_stat_config_stub(struct perf_tool *tool __maybe_unused,
316 union perf_event *event __maybe_unused,
317 struct perf_session *session __maybe_unused)
318 {
319 if (dump_trace)
320 perf_event__fprintf_stat_config(event, stdout);
321
322 dump_printf(": unhandled!\n");
323 return 0;
324 }
325
326 static int process_stat_stub(struct perf_tool *tool __maybe_unused,
327 union perf_event *event __maybe_unused,
328 struct perf_session *perf_session
329 __maybe_unused)
330 {
331 if (dump_trace)
332 perf_event__fprintf_stat(event, stdout);
333
334 dump_printf(": unhandled!\n");
335 return 0;
336 }
337
338 static int process_stat_round_stub(struct perf_tool *tool __maybe_unused,
339 union perf_event *event __maybe_unused,
340 struct perf_session *perf_session
341 __maybe_unused)
342 {
343 if (dump_trace)
344 perf_event__fprintf_stat_round(event, stdout);
345
346 dump_printf(": unhandled!\n");
347 return 0;
348 }
349
350 void perf_tool__fill_defaults(struct perf_tool *tool)
351 {
352 if (tool->sample == NULL)
353 tool->sample = process_event_sample_stub;
354 if (tool->mmap == NULL)
355 tool->mmap = process_event_stub;
356 if (tool->mmap2 == NULL)
357 tool->mmap2 = process_event_stub;
358 if (tool->comm == NULL)
359 tool->comm = process_event_stub;
360 if (tool->fork == NULL)
361 tool->fork = process_event_stub;
362 if (tool->exit == NULL)
363 tool->exit = process_event_stub;
364 if (tool->lost == NULL)
365 tool->lost = perf_event__process_lost;
366 if (tool->lost_samples == NULL)
367 tool->lost_samples = perf_event__process_lost_samples;
368 if (tool->aux == NULL)
369 tool->aux = perf_event__process_aux;
370 if (tool->itrace_start == NULL)
371 tool->itrace_start = perf_event__process_itrace_start;
372 if (tool->context_switch == NULL)
373 tool->context_switch = perf_event__process_switch;
374 if (tool->read == NULL)
375 tool->read = process_event_sample_stub;
376 if (tool->throttle == NULL)
377 tool->throttle = process_event_stub;
378 if (tool->unthrottle == NULL)
379 tool->unthrottle = process_event_stub;
380 if (tool->attr == NULL)
381 tool->attr = process_event_synth_attr_stub;
382 if (tool->event_update == NULL)
383 tool->event_update = process_event_synth_event_update_stub;
384 if (tool->tracing_data == NULL)
385 tool->tracing_data = process_event_synth_tracing_data_stub;
386 if (tool->build_id == NULL)
387 tool->build_id = process_event_op2_stub;
388 if (tool->finished_round == NULL) {
389 if (tool->ordered_events)
390 tool->finished_round = process_finished_round;
391 else
392 tool->finished_round = process_finished_round_stub;
393 }
394 if (tool->id_index == NULL)
395 tool->id_index = process_event_op2_stub;
396 if (tool->auxtrace_info == NULL)
397 tool->auxtrace_info = process_event_op2_stub;
398 if (tool->auxtrace == NULL)
399 tool->auxtrace = process_event_auxtrace_stub;
400 if (tool->auxtrace_error == NULL)
401 tool->auxtrace_error = process_event_op2_stub;
402 if (tool->thread_map == NULL)
403 tool->thread_map = process_event_thread_map_stub;
404 if (tool->cpu_map == NULL)
405 tool->cpu_map = process_event_cpu_map_stub;
406 if (tool->stat_config == NULL)
407 tool->stat_config = process_event_stat_config_stub;
408 if (tool->stat == NULL)
409 tool->stat = process_stat_stub;
410 if (tool->stat_round == NULL)
411 tool->stat_round = process_stat_round_stub;
412 }
413
414 static void swap_sample_id_all(union perf_event *event, void *data)
415 {
416 void *end = (void *) event + event->header.size;
417 int size = end - data;
418
419 BUG_ON(size % sizeof(u64));
420 mem_bswap_64(data, size);
421 }
422
423 static void perf_event__all64_swap(union perf_event *event,
424 bool sample_id_all __maybe_unused)
425 {
426 struct perf_event_header *hdr = &event->header;
427 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
428 }
429
430 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
431 {
432 event->comm.pid = bswap_32(event->comm.pid);
433 event->comm.tid = bswap_32(event->comm.tid);
434
435 if (sample_id_all) {
436 void *data = &event->comm.comm;
437
438 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
439 swap_sample_id_all(event, data);
440 }
441 }
442
443 static void perf_event__mmap_swap(union perf_event *event,
444 bool sample_id_all)
445 {
446 event->mmap.pid = bswap_32(event->mmap.pid);
447 event->mmap.tid = bswap_32(event->mmap.tid);
448 event->mmap.start = bswap_64(event->mmap.start);
449 event->mmap.len = bswap_64(event->mmap.len);
450 event->mmap.pgoff = bswap_64(event->mmap.pgoff);
451
452 if (sample_id_all) {
453 void *data = &event->mmap.filename;
454
455 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
456 swap_sample_id_all(event, data);
457 }
458 }
459
460 static void perf_event__mmap2_swap(union perf_event *event,
461 bool sample_id_all)
462 {
463 event->mmap2.pid = bswap_32(event->mmap2.pid);
464 event->mmap2.tid = bswap_32(event->mmap2.tid);
465 event->mmap2.start = bswap_64(event->mmap2.start);
466 event->mmap2.len = bswap_64(event->mmap2.len);
467 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
468 event->mmap2.maj = bswap_32(event->mmap2.maj);
469 event->mmap2.min = bswap_32(event->mmap2.min);
470 event->mmap2.ino = bswap_64(event->mmap2.ino);
471
472 if (sample_id_all) {
473 void *data = &event->mmap2.filename;
474
475 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
476 swap_sample_id_all(event, data);
477 }
478 }
479 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
480 {
481 event->fork.pid = bswap_32(event->fork.pid);
482 event->fork.tid = bswap_32(event->fork.tid);
483 event->fork.ppid = bswap_32(event->fork.ppid);
484 event->fork.ptid = bswap_32(event->fork.ptid);
485 event->fork.time = bswap_64(event->fork.time);
486
487 if (sample_id_all)
488 swap_sample_id_all(event, &event->fork + 1);
489 }
490
491 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
492 {
493 event->read.pid = bswap_32(event->read.pid);
494 event->read.tid = bswap_32(event->read.tid);
495 event->read.value = bswap_64(event->read.value);
496 event->read.time_enabled = bswap_64(event->read.time_enabled);
497 event->read.time_running = bswap_64(event->read.time_running);
498 event->read.id = bswap_64(event->read.id);
499
500 if (sample_id_all)
501 swap_sample_id_all(event, &event->read + 1);
502 }
503
504 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
505 {
506 event->aux.aux_offset = bswap_64(event->aux.aux_offset);
507 event->aux.aux_size = bswap_64(event->aux.aux_size);
508 event->aux.flags = bswap_64(event->aux.flags);
509
510 if (sample_id_all)
511 swap_sample_id_all(event, &event->aux + 1);
512 }
513
514 static void perf_event__itrace_start_swap(union perf_event *event,
515 bool sample_id_all)
516 {
517 event->itrace_start.pid = bswap_32(event->itrace_start.pid);
518 event->itrace_start.tid = bswap_32(event->itrace_start.tid);
519
520 if (sample_id_all)
521 swap_sample_id_all(event, &event->itrace_start + 1);
522 }
523
524 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
525 {
526 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
527 event->context_switch.next_prev_pid =
528 bswap_32(event->context_switch.next_prev_pid);
529 event->context_switch.next_prev_tid =
530 bswap_32(event->context_switch.next_prev_tid);
531 }
532
533 if (sample_id_all)
534 swap_sample_id_all(event, &event->context_switch + 1);
535 }
536
537 static void perf_event__throttle_swap(union perf_event *event,
538 bool sample_id_all)
539 {
540 event->throttle.time = bswap_64(event->throttle.time);
541 event->throttle.id = bswap_64(event->throttle.id);
542 event->throttle.stream_id = bswap_64(event->throttle.stream_id);
543
544 if (sample_id_all)
545 swap_sample_id_all(event, &event->throttle + 1);
546 }
547
548 static u8 revbyte(u8 b)
549 {
550 int rev = (b >> 4) | ((b & 0xf) << 4);
551 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
552 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
553 return (u8) rev;
554 }
555
556 /*
557 * XXX this is hack in attempt to carry flags bitfield
558 * throught endian village. ABI says:
559 *
560 * Bit-fields are allocated from right to left (least to most significant)
561 * on little-endian implementations and from left to right (most to least
562 * significant) on big-endian implementations.
563 *
564 * The above seems to be byte specific, so we need to reverse each
565 * byte of the bitfield. 'Internet' also says this might be implementation
566 * specific and we probably need proper fix and carry perf_event_attr
567 * bitfield flags in separate data file FEAT_ section. Thought this seems
568 * to work for now.
569 */
570 static void swap_bitfield(u8 *p, unsigned len)
571 {
572 unsigned i;
573
574 for (i = 0; i < len; i++) {
575 *p = revbyte(*p);
576 p++;
577 }
578 }
579
580 /* exported for swapping attributes in file header */
581 void perf_event__attr_swap(struct perf_event_attr *attr)
582 {
583 attr->type = bswap_32(attr->type);
584 attr->size = bswap_32(attr->size);
585
586 #define bswap_safe(f, n) \
587 (attr->size > (offsetof(struct perf_event_attr, f) + \
588 sizeof(attr->f) * (n)))
589 #define bswap_field(f, sz) \
590 do { \
591 if (bswap_safe(f, 0)) \
592 attr->f = bswap_##sz(attr->f); \
593 } while(0)
594 #define bswap_field_32(f) bswap_field(f, 32)
595 #define bswap_field_64(f) bswap_field(f, 64)
596
597 bswap_field_64(config);
598 bswap_field_64(sample_period);
599 bswap_field_64(sample_type);
600 bswap_field_64(read_format);
601 bswap_field_32(wakeup_events);
602 bswap_field_32(bp_type);
603 bswap_field_64(bp_addr);
604 bswap_field_64(bp_len);
605 bswap_field_64(branch_sample_type);
606 bswap_field_64(sample_regs_user);
607 bswap_field_32(sample_stack_user);
608 bswap_field_32(aux_watermark);
609
610 /*
611 * After read_format are bitfields. Check read_format because
612 * we are unable to use offsetof on bitfield.
613 */
614 if (bswap_safe(read_format, 1))
615 swap_bitfield((u8 *) (&attr->read_format + 1),
616 sizeof(u64));
617 #undef bswap_field_64
618 #undef bswap_field_32
619 #undef bswap_field
620 #undef bswap_safe
621 }
622
623 static void perf_event__hdr_attr_swap(union perf_event *event,
624 bool sample_id_all __maybe_unused)
625 {
626 size_t size;
627
628 perf_event__attr_swap(&event->attr.attr);
629
630 size = event->header.size;
631 size -= (void *)&event->attr.id - (void *)event;
632 mem_bswap_64(event->attr.id, size);
633 }
634
635 static void perf_event__event_update_swap(union perf_event *event,
636 bool sample_id_all __maybe_unused)
637 {
638 event->event_update.type = bswap_64(event->event_update.type);
639 event->event_update.id = bswap_64(event->event_update.id);
640 }
641
642 static void perf_event__event_type_swap(union perf_event *event,
643 bool sample_id_all __maybe_unused)
644 {
645 event->event_type.event_type.event_id =
646 bswap_64(event->event_type.event_type.event_id);
647 }
648
649 static void perf_event__tracing_data_swap(union perf_event *event,
650 bool sample_id_all __maybe_unused)
651 {
652 event->tracing_data.size = bswap_32(event->tracing_data.size);
653 }
654
655 static void perf_event__auxtrace_info_swap(union perf_event *event,
656 bool sample_id_all __maybe_unused)
657 {
658 size_t size;
659
660 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
661
662 size = event->header.size;
663 size -= (void *)&event->auxtrace_info.priv - (void *)event;
664 mem_bswap_64(event->auxtrace_info.priv, size);
665 }
666
667 static void perf_event__auxtrace_swap(union perf_event *event,
668 bool sample_id_all __maybe_unused)
669 {
670 event->auxtrace.size = bswap_64(event->auxtrace.size);
671 event->auxtrace.offset = bswap_64(event->auxtrace.offset);
672 event->auxtrace.reference = bswap_64(event->auxtrace.reference);
673 event->auxtrace.idx = bswap_32(event->auxtrace.idx);
674 event->auxtrace.tid = bswap_32(event->auxtrace.tid);
675 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu);
676 }
677
678 static void perf_event__auxtrace_error_swap(union perf_event *event,
679 bool sample_id_all __maybe_unused)
680 {
681 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
682 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
683 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu);
684 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid);
685 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid);
686 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip);
687 }
688
689 static void perf_event__thread_map_swap(union perf_event *event,
690 bool sample_id_all __maybe_unused)
691 {
692 unsigned i;
693
694 event->thread_map.nr = bswap_64(event->thread_map.nr);
695
696 for (i = 0; i < event->thread_map.nr; i++)
697 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
698 }
699
700 static void perf_event__cpu_map_swap(union perf_event *event,
701 bool sample_id_all __maybe_unused)
702 {
703 struct cpu_map_data *data = &event->cpu_map.data;
704 struct cpu_map_entries *cpus;
705 struct cpu_map_mask *mask;
706 unsigned i;
707
708 data->type = bswap_64(data->type);
709
710 switch (data->type) {
711 case PERF_CPU_MAP__CPUS:
712 cpus = (struct cpu_map_entries *)data->data;
713
714 cpus->nr = bswap_16(cpus->nr);
715
716 for (i = 0; i < cpus->nr; i++)
717 cpus->cpu[i] = bswap_16(cpus->cpu[i]);
718 break;
719 case PERF_CPU_MAP__MASK:
720 mask = (struct cpu_map_mask *) data->data;
721
722 mask->nr = bswap_16(mask->nr);
723 mask->long_size = bswap_16(mask->long_size);
724
725 switch (mask->long_size) {
726 case 4: mem_bswap_32(&mask->mask, mask->nr); break;
727 case 8: mem_bswap_64(&mask->mask, mask->nr); break;
728 default:
729 pr_err("cpu_map swap: unsupported long size\n");
730 }
731 default:
732 break;
733 }
734 }
735
736 static void perf_event__stat_config_swap(union perf_event *event,
737 bool sample_id_all __maybe_unused)
738 {
739 u64 size;
740
741 size = event->stat_config.nr * sizeof(event->stat_config.data[0]);
742 size += 1; /* nr item itself */
743 mem_bswap_64(&event->stat_config.nr, size);
744 }
745
746 static void perf_event__stat_swap(union perf_event *event,
747 bool sample_id_all __maybe_unused)
748 {
749 event->stat.id = bswap_64(event->stat.id);
750 event->stat.thread = bswap_32(event->stat.thread);
751 event->stat.cpu = bswap_32(event->stat.cpu);
752 event->stat.val = bswap_64(event->stat.val);
753 event->stat.ena = bswap_64(event->stat.ena);
754 event->stat.run = bswap_64(event->stat.run);
755 }
756
757 static void perf_event__stat_round_swap(union perf_event *event,
758 bool sample_id_all __maybe_unused)
759 {
760 event->stat_round.type = bswap_64(event->stat_round.type);
761 event->stat_round.time = bswap_64(event->stat_round.time);
762 }
763
764 typedef void (*perf_event__swap_op)(union perf_event *event,
765 bool sample_id_all);
766
767 static perf_event__swap_op perf_event__swap_ops[] = {
768 [PERF_RECORD_MMAP] = perf_event__mmap_swap,
769 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap,
770 [PERF_RECORD_COMM] = perf_event__comm_swap,
771 [PERF_RECORD_FORK] = perf_event__task_swap,
772 [PERF_RECORD_EXIT] = perf_event__task_swap,
773 [PERF_RECORD_LOST] = perf_event__all64_swap,
774 [PERF_RECORD_READ] = perf_event__read_swap,
775 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap,
776 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap,
777 [PERF_RECORD_SAMPLE] = perf_event__all64_swap,
778 [PERF_RECORD_AUX] = perf_event__aux_swap,
779 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap,
780 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap,
781 [PERF_RECORD_SWITCH] = perf_event__switch_swap,
782 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap,
783 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
784 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
785 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
786 [PERF_RECORD_HEADER_BUILD_ID] = NULL,
787 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap,
788 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap,
789 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap,
790 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap,
791 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap,
792 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap,
793 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap,
794 [PERF_RECORD_STAT] = perf_event__stat_swap,
795 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap,
796 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap,
797 [PERF_RECORD_HEADER_MAX] = NULL,
798 };
799
800 /*
801 * When perf record finishes a pass on every buffers, it records this pseudo
802 * event.
803 * We record the max timestamp t found in the pass n.
804 * Assuming these timestamps are monotonic across cpus, we know that if
805 * a buffer still has events with timestamps below t, they will be all
806 * available and then read in the pass n + 1.
807 * Hence when we start to read the pass n + 2, we can safely flush every
808 * events with timestamps below t.
809 *
810 * ============ PASS n =================
811 * CPU 0 | CPU 1
812 * |
813 * cnt1 timestamps | cnt2 timestamps
814 * 1 | 2
815 * 2 | 3
816 * - | 4 <--- max recorded
817 *
818 * ============ PASS n + 1 ==============
819 * CPU 0 | CPU 1
820 * |
821 * cnt1 timestamps | cnt2 timestamps
822 * 3 | 5
823 * 4 | 6
824 * 5 | 7 <---- max recorded
825 *
826 * Flush every events below timestamp 4
827 *
828 * ============ PASS n + 2 ==============
829 * CPU 0 | CPU 1
830 * |
831 * cnt1 timestamps | cnt2 timestamps
832 * 6 | 8
833 * 7 | 9
834 * - | 10
835 *
836 * Flush every events below timestamp 7
837 * etc...
838 */
839 static int process_finished_round(struct perf_tool *tool __maybe_unused,
840 union perf_event *event __maybe_unused,
841 struct ordered_events *oe)
842 {
843 if (dump_trace)
844 fprintf(stdout, "\n");
845 return ordered_events__flush(oe, OE_FLUSH__ROUND);
846 }
847
848 int perf_session__queue_event(struct perf_session *s, union perf_event *event,
849 struct perf_sample *sample, u64 file_offset)
850 {
851 return ordered_events__queue(&s->ordered_events, event, sample, file_offset);
852 }
853
854 static void callchain__lbr_callstack_printf(struct perf_sample *sample)
855 {
856 struct ip_callchain *callchain = sample->callchain;
857 struct branch_stack *lbr_stack = sample->branch_stack;
858 u64 kernel_callchain_nr = callchain->nr;
859 unsigned int i;
860
861 for (i = 0; i < kernel_callchain_nr; i++) {
862 if (callchain->ips[i] == PERF_CONTEXT_USER)
863 break;
864 }
865
866 if ((i != kernel_callchain_nr) && lbr_stack->nr) {
867 u64 total_nr;
868 /*
869 * LBR callstack can only get user call chain,
870 * i is kernel call chain number,
871 * 1 is PERF_CONTEXT_USER.
872 *
873 * The user call chain is stored in LBR registers.
874 * LBR are pair registers. The caller is stored
875 * in "from" register, while the callee is stored
876 * in "to" register.
877 * For example, there is a call stack
878 * "A"->"B"->"C"->"D".
879 * The LBR registers will recorde like
880 * "C"->"D", "B"->"C", "A"->"B".
881 * So only the first "to" register and all "from"
882 * registers are needed to construct the whole stack.
883 */
884 total_nr = i + 1 + lbr_stack->nr + 1;
885 kernel_callchain_nr = i + 1;
886
887 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
888
889 for (i = 0; i < kernel_callchain_nr; i++)
890 printf("..... %2d: %016" PRIx64 "\n",
891 i, callchain->ips[i]);
892
893 printf("..... %2d: %016" PRIx64 "\n",
894 (int)(kernel_callchain_nr), lbr_stack->entries[0].to);
895 for (i = 0; i < lbr_stack->nr; i++)
896 printf("..... %2d: %016" PRIx64 "\n",
897 (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from);
898 }
899 }
900
901 static void callchain__printf(struct perf_evsel *evsel,
902 struct perf_sample *sample)
903 {
904 unsigned int i;
905 struct ip_callchain *callchain = sample->callchain;
906
907 if (has_branch_callstack(evsel))
908 callchain__lbr_callstack_printf(sample);
909
910 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
911
912 for (i = 0; i < callchain->nr; i++)
913 printf("..... %2d: %016" PRIx64 "\n",
914 i, callchain->ips[i]);
915 }
916
917 static void branch_stack__printf(struct perf_sample *sample)
918 {
919 uint64_t i;
920
921 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
922
923 for (i = 0; i < sample->branch_stack->nr; i++) {
924 struct branch_entry *e = &sample->branch_stack->entries[i];
925
926 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n",
927 i, e->from, e->to,
928 e->flags.cycles,
929 e->flags.mispred ? "M" : " ",
930 e->flags.predicted ? "P" : " ",
931 e->flags.abort ? "A" : " ",
932 e->flags.in_tx ? "T" : " ",
933 (unsigned)e->flags.reserved);
934 }
935 }
936
937 static void regs_dump__printf(u64 mask, u64 *regs)
938 {
939 unsigned rid, i = 0;
940
941 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
942 u64 val = regs[i++];
943
944 printf(".... %-5s 0x%" PRIx64 "\n",
945 perf_reg_name(rid), val);
946 }
947 }
948
949 static const char *regs_abi[] = {
950 [PERF_SAMPLE_REGS_ABI_NONE] = "none",
951 [PERF_SAMPLE_REGS_ABI_32] = "32-bit",
952 [PERF_SAMPLE_REGS_ABI_64] = "64-bit",
953 };
954
955 static inline const char *regs_dump_abi(struct regs_dump *d)
956 {
957 if (d->abi > PERF_SAMPLE_REGS_ABI_64)
958 return "unknown";
959
960 return regs_abi[d->abi];
961 }
962
963 static void regs__printf(const char *type, struct regs_dump *regs)
964 {
965 u64 mask = regs->mask;
966
967 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
968 type,
969 mask,
970 regs_dump_abi(regs));
971
972 regs_dump__printf(mask, regs->regs);
973 }
974
975 static void regs_user__printf(struct perf_sample *sample)
976 {
977 struct regs_dump *user_regs = &sample->user_regs;
978
979 if (user_regs->regs)
980 regs__printf("user", user_regs);
981 }
982
983 static void regs_intr__printf(struct perf_sample *sample)
984 {
985 struct regs_dump *intr_regs = &sample->intr_regs;
986
987 if (intr_regs->regs)
988 regs__printf("intr", intr_regs);
989 }
990
991 static void stack_user__printf(struct stack_dump *dump)
992 {
993 printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
994 dump->size, dump->offset);
995 }
996
997 static void perf_evlist__print_tstamp(struct perf_evlist *evlist,
998 union perf_event *event,
999 struct perf_sample *sample)
1000 {
1001 u64 sample_type = __perf_evlist__combined_sample_type(evlist);
1002
1003 if (event->header.type != PERF_RECORD_SAMPLE &&
1004 !perf_evlist__sample_id_all(evlist)) {
1005 fputs("-1 -1 ", stdout);
1006 return;
1007 }
1008
1009 if ((sample_type & PERF_SAMPLE_CPU))
1010 printf("%u ", sample->cpu);
1011
1012 if (sample_type & PERF_SAMPLE_TIME)
1013 printf("%" PRIu64 " ", sample->time);
1014 }
1015
1016 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
1017 {
1018 printf("... sample_read:\n");
1019
1020 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1021 printf("...... time enabled %016" PRIx64 "\n",
1022 sample->read.time_enabled);
1023
1024 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1025 printf("...... time running %016" PRIx64 "\n",
1026 sample->read.time_running);
1027
1028 if (read_format & PERF_FORMAT_GROUP) {
1029 u64 i;
1030
1031 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
1032
1033 for (i = 0; i < sample->read.group.nr; i++) {
1034 struct sample_read_value *value;
1035
1036 value = &sample->read.group.values[i];
1037 printf("..... id %016" PRIx64
1038 ", value %016" PRIx64 "\n",
1039 value->id, value->value);
1040 }
1041 } else
1042 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
1043 sample->read.one.id, sample->read.one.value);
1044 }
1045
1046 static void dump_event(struct perf_evlist *evlist, union perf_event *event,
1047 u64 file_offset, struct perf_sample *sample)
1048 {
1049 if (!dump_trace)
1050 return;
1051
1052 printf("\n%#" PRIx64 " [%#x]: event: %d\n",
1053 file_offset, event->header.size, event->header.type);
1054
1055 trace_event(event);
1056
1057 if (sample)
1058 perf_evlist__print_tstamp(evlist, event, sample);
1059
1060 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
1061 event->header.size, perf_event__name(event->header.type));
1062 }
1063
1064 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
1065 struct perf_sample *sample)
1066 {
1067 u64 sample_type;
1068
1069 if (!dump_trace)
1070 return;
1071
1072 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
1073 event->header.misc, sample->pid, sample->tid, sample->ip,
1074 sample->period, sample->addr);
1075
1076 sample_type = evsel->attr.sample_type;
1077
1078 if (sample_type & PERF_SAMPLE_CALLCHAIN)
1079 callchain__printf(evsel, sample);
1080
1081 if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !has_branch_callstack(evsel))
1082 branch_stack__printf(sample);
1083
1084 if (sample_type & PERF_SAMPLE_REGS_USER)
1085 regs_user__printf(sample);
1086
1087 if (sample_type & PERF_SAMPLE_REGS_INTR)
1088 regs_intr__printf(sample);
1089
1090 if (sample_type & PERF_SAMPLE_STACK_USER)
1091 stack_user__printf(&sample->user_stack);
1092
1093 if (sample_type & PERF_SAMPLE_WEIGHT)
1094 printf("... weight: %" PRIu64 "\n", sample->weight);
1095
1096 if (sample_type & PERF_SAMPLE_DATA_SRC)
1097 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
1098
1099 if (sample_type & PERF_SAMPLE_TRANSACTION)
1100 printf("... transaction: %" PRIx64 "\n", sample->transaction);
1101
1102 if (sample_type & PERF_SAMPLE_READ)
1103 sample_read__printf(sample, evsel->attr.read_format);
1104 }
1105
1106 static struct machine *machines__find_for_cpumode(struct machines *machines,
1107 union perf_event *event,
1108 struct perf_sample *sample)
1109 {
1110 const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1111 struct machine *machine;
1112
1113 if (perf_guest &&
1114 ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1115 (cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1116 u32 pid;
1117
1118 if (event->header.type == PERF_RECORD_MMAP
1119 || event->header.type == PERF_RECORD_MMAP2)
1120 pid = event->mmap.pid;
1121 else
1122 pid = sample->pid;
1123
1124 machine = machines__find(machines, pid);
1125 if (!machine)
1126 machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID);
1127 return machine;
1128 }
1129
1130 return &machines->host;
1131 }
1132
1133 static int deliver_sample_value(struct perf_evlist *evlist,
1134 struct perf_tool *tool,
1135 union perf_event *event,
1136 struct perf_sample *sample,
1137 struct sample_read_value *v,
1138 struct machine *machine)
1139 {
1140 struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
1141
1142 if (sid) {
1143 sample->id = v->id;
1144 sample->period = v->value - sid->period;
1145 sid->period = v->value;
1146 }
1147
1148 if (!sid || sid->evsel == NULL) {
1149 ++evlist->stats.nr_unknown_id;
1150 return 0;
1151 }
1152
1153 return tool->sample(tool, event, sample, sid->evsel, machine);
1154 }
1155
1156 static int deliver_sample_group(struct perf_evlist *evlist,
1157 struct perf_tool *tool,
1158 union perf_event *event,
1159 struct perf_sample *sample,
1160 struct machine *machine)
1161 {
1162 int ret = -EINVAL;
1163 u64 i;
1164
1165 for (i = 0; i < sample->read.group.nr; i++) {
1166 ret = deliver_sample_value(evlist, tool, event, sample,
1167 &sample->read.group.values[i],
1168 machine);
1169 if (ret)
1170 break;
1171 }
1172
1173 return ret;
1174 }
1175
1176 static int
1177 perf_evlist__deliver_sample(struct perf_evlist *evlist,
1178 struct perf_tool *tool,
1179 union perf_event *event,
1180 struct perf_sample *sample,
1181 struct perf_evsel *evsel,
1182 struct machine *machine)
1183 {
1184 /* We know evsel != NULL. */
1185 u64 sample_type = evsel->attr.sample_type;
1186 u64 read_format = evsel->attr.read_format;
1187
1188 /* Standard sample delievery. */
1189 if (!(sample_type & PERF_SAMPLE_READ))
1190 return tool->sample(tool, event, sample, evsel, machine);
1191
1192 /* For PERF_SAMPLE_READ we have either single or group mode. */
1193 if (read_format & PERF_FORMAT_GROUP)
1194 return deliver_sample_group(evlist, tool, event, sample,
1195 machine);
1196 else
1197 return deliver_sample_value(evlist, tool, event, sample,
1198 &sample->read.one, machine);
1199 }
1200
1201 static int machines__deliver_event(struct machines *machines,
1202 struct perf_evlist *evlist,
1203 union perf_event *event,
1204 struct perf_sample *sample,
1205 struct perf_tool *tool, u64 file_offset)
1206 {
1207 struct perf_evsel *evsel;
1208 struct machine *machine;
1209
1210 dump_event(evlist, event, file_offset, sample);
1211
1212 evsel = perf_evlist__id2evsel(evlist, sample->id);
1213
1214 machine = machines__find_for_cpumode(machines, event, sample);
1215
1216 switch (event->header.type) {
1217 case PERF_RECORD_SAMPLE:
1218 if (evsel == NULL) {
1219 ++evlist->stats.nr_unknown_id;
1220 return 0;
1221 }
1222 dump_sample(evsel, event, sample);
1223 if (machine == NULL) {
1224 ++evlist->stats.nr_unprocessable_samples;
1225 return 0;
1226 }
1227 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1228 case PERF_RECORD_MMAP:
1229 return tool->mmap(tool, event, sample, machine);
1230 case PERF_RECORD_MMAP2:
1231 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1232 ++evlist->stats.nr_proc_map_timeout;
1233 return tool->mmap2(tool, event, sample, machine);
1234 case PERF_RECORD_COMM:
1235 return tool->comm(tool, event, sample, machine);
1236 case PERF_RECORD_FORK:
1237 return tool->fork(tool, event, sample, machine);
1238 case PERF_RECORD_EXIT:
1239 return tool->exit(tool, event, sample, machine);
1240 case PERF_RECORD_LOST:
1241 if (tool->lost == perf_event__process_lost)
1242 evlist->stats.total_lost += event->lost.lost;
1243 return tool->lost(tool, event, sample, machine);
1244 case PERF_RECORD_LOST_SAMPLES:
1245 if (tool->lost_samples == perf_event__process_lost_samples)
1246 evlist->stats.total_lost_samples += event->lost_samples.lost;
1247 return tool->lost_samples(tool, event, sample, machine);
1248 case PERF_RECORD_READ:
1249 return tool->read(tool, event, sample, evsel, machine);
1250 case PERF_RECORD_THROTTLE:
1251 return tool->throttle(tool, event, sample, machine);
1252 case PERF_RECORD_UNTHROTTLE:
1253 return tool->unthrottle(tool, event, sample, machine);
1254 case PERF_RECORD_AUX:
1255 if (tool->aux == perf_event__process_aux &&
1256 (event->aux.flags & PERF_AUX_FLAG_TRUNCATED))
1257 evlist->stats.total_aux_lost += 1;
1258 return tool->aux(tool, event, sample, machine);
1259 case PERF_RECORD_ITRACE_START:
1260 return tool->itrace_start(tool, event, sample, machine);
1261 case PERF_RECORD_SWITCH:
1262 case PERF_RECORD_SWITCH_CPU_WIDE:
1263 return tool->context_switch(tool, event, sample, machine);
1264 default:
1265 ++evlist->stats.nr_unknown_events;
1266 return -1;
1267 }
1268 }
1269
1270 static int perf_session__deliver_event(struct perf_session *session,
1271 union perf_event *event,
1272 struct perf_sample *sample,
1273 struct perf_tool *tool,
1274 u64 file_offset)
1275 {
1276 int ret;
1277
1278 ret = auxtrace__process_event(session, event, sample, tool);
1279 if (ret < 0)
1280 return ret;
1281 if (ret > 0)
1282 return 0;
1283
1284 return machines__deliver_event(&session->machines, session->evlist,
1285 event, sample, tool, file_offset);
1286 }
1287
1288 static s64 perf_session__process_user_event(struct perf_session *session,
1289 union perf_event *event,
1290 u64 file_offset)
1291 {
1292 struct ordered_events *oe = &session->ordered_events;
1293 struct perf_tool *tool = session->tool;
1294 int fd = perf_data_file__fd(session->file);
1295 int err;
1296
1297 dump_event(session->evlist, event, file_offset, NULL);
1298
1299 /* These events are processed right away */
1300 switch (event->header.type) {
1301 case PERF_RECORD_HEADER_ATTR:
1302 err = tool->attr(tool, event, &session->evlist);
1303 if (err == 0) {
1304 perf_session__set_id_hdr_size(session);
1305 perf_session__set_comm_exec(session);
1306 }
1307 return err;
1308 case PERF_RECORD_EVENT_UPDATE:
1309 return tool->event_update(tool, event, &session->evlist);
1310 case PERF_RECORD_HEADER_EVENT_TYPE:
1311 /*
1312 * Depreceated, but we need to handle it for sake
1313 * of old data files create in pipe mode.
1314 */
1315 return 0;
1316 case PERF_RECORD_HEADER_TRACING_DATA:
1317 /* setup for reading amidst mmap */
1318 lseek(fd, file_offset, SEEK_SET);
1319 return tool->tracing_data(tool, event, session);
1320 case PERF_RECORD_HEADER_BUILD_ID:
1321 return tool->build_id(tool, event, session);
1322 case PERF_RECORD_FINISHED_ROUND:
1323 return tool->finished_round(tool, event, oe);
1324 case PERF_RECORD_ID_INDEX:
1325 return tool->id_index(tool, event, session);
1326 case PERF_RECORD_AUXTRACE_INFO:
1327 return tool->auxtrace_info(tool, event, session);
1328 case PERF_RECORD_AUXTRACE:
1329 /* setup for reading amidst mmap */
1330 lseek(fd, file_offset + event->header.size, SEEK_SET);
1331 return tool->auxtrace(tool, event, session);
1332 case PERF_RECORD_AUXTRACE_ERROR:
1333 perf_session__auxtrace_error_inc(session, event);
1334 return tool->auxtrace_error(tool, event, session);
1335 case PERF_RECORD_THREAD_MAP:
1336 return tool->thread_map(tool, event, session);
1337 case PERF_RECORD_CPU_MAP:
1338 return tool->cpu_map(tool, event, session);
1339 case PERF_RECORD_STAT_CONFIG:
1340 return tool->stat_config(tool, event, session);
1341 case PERF_RECORD_STAT:
1342 return tool->stat(tool, event, session);
1343 case PERF_RECORD_STAT_ROUND:
1344 return tool->stat_round(tool, event, session);
1345 default:
1346 return -EINVAL;
1347 }
1348 }
1349
1350 int perf_session__deliver_synth_event(struct perf_session *session,
1351 union perf_event *event,
1352 struct perf_sample *sample)
1353 {
1354 struct perf_evlist *evlist = session->evlist;
1355 struct perf_tool *tool = session->tool;
1356
1357 events_stats__inc(&evlist->stats, event->header.type);
1358
1359 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1360 return perf_session__process_user_event(session, event, 0);
1361
1362 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0);
1363 }
1364
1365 static void event_swap(union perf_event *event, bool sample_id_all)
1366 {
1367 perf_event__swap_op swap;
1368
1369 swap = perf_event__swap_ops[event->header.type];
1370 if (swap)
1371 swap(event, sample_id_all);
1372 }
1373
1374 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1375 void *buf, size_t buf_sz,
1376 union perf_event **event_ptr,
1377 struct perf_sample *sample)
1378 {
1379 union perf_event *event;
1380 size_t hdr_sz, rest;
1381 int fd;
1382
1383 if (session->one_mmap && !session->header.needs_swap) {
1384 event = file_offset - session->one_mmap_offset +
1385 session->one_mmap_addr;
1386 goto out_parse_sample;
1387 }
1388
1389 if (perf_data_file__is_pipe(session->file))
1390 return -1;
1391
1392 fd = perf_data_file__fd(session->file);
1393 hdr_sz = sizeof(struct perf_event_header);
1394
1395 if (buf_sz < hdr_sz)
1396 return -1;
1397
1398 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1399 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1400 return -1;
1401
1402 event = (union perf_event *)buf;
1403
1404 if (session->header.needs_swap)
1405 perf_event_header__bswap(&event->header);
1406
1407 if (event->header.size < hdr_sz || event->header.size > buf_sz)
1408 return -1;
1409
1410 rest = event->header.size - hdr_sz;
1411
1412 if (readn(fd, buf, rest) != (ssize_t)rest)
1413 return -1;
1414
1415 if (session->header.needs_swap)
1416 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1417
1418 out_parse_sample:
1419
1420 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1421 perf_evlist__parse_sample(session->evlist, event, sample))
1422 return -1;
1423
1424 *event_ptr = event;
1425
1426 return 0;
1427 }
1428
1429 static s64 perf_session__process_event(struct perf_session *session,
1430 union perf_event *event, u64 file_offset)
1431 {
1432 struct perf_evlist *evlist = session->evlist;
1433 struct perf_tool *tool = session->tool;
1434 struct perf_sample sample;
1435 int ret;
1436
1437 if (session->header.needs_swap)
1438 event_swap(event, perf_evlist__sample_id_all(evlist));
1439
1440 if (event->header.type >= PERF_RECORD_HEADER_MAX)
1441 return -EINVAL;
1442
1443 events_stats__inc(&evlist->stats, event->header.type);
1444
1445 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1446 return perf_session__process_user_event(session, event, file_offset);
1447
1448 /*
1449 * For all kernel events we get the sample data
1450 */
1451 ret = perf_evlist__parse_sample(evlist, event, &sample);
1452 if (ret)
1453 return ret;
1454
1455 if (tool->ordered_events) {
1456 ret = perf_session__queue_event(session, event, &sample, file_offset);
1457 if (ret != -ETIME)
1458 return ret;
1459 }
1460
1461 return perf_session__deliver_event(session, event, &sample, tool,
1462 file_offset);
1463 }
1464
1465 void perf_event_header__bswap(struct perf_event_header *hdr)
1466 {
1467 hdr->type = bswap_32(hdr->type);
1468 hdr->misc = bswap_16(hdr->misc);
1469 hdr->size = bswap_16(hdr->size);
1470 }
1471
1472 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1473 {
1474 return machine__findnew_thread(&session->machines.host, -1, pid);
1475 }
1476
1477 int perf_session__register_idle_thread(struct perf_session *session)
1478 {
1479 struct thread *thread;
1480 int err = 0;
1481
1482 thread = machine__findnew_thread(&session->machines.host, 0, 0);
1483 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1484 pr_err("problem inserting idle task.\n");
1485 err = -1;
1486 }
1487
1488 /* machine__findnew_thread() got the thread, so put it */
1489 thread__put(thread);
1490 return err;
1491 }
1492
1493 static void perf_session__warn_about_errors(const struct perf_session *session)
1494 {
1495 const struct events_stats *stats = &session->evlist->stats;
1496 const struct ordered_events *oe = &session->ordered_events;
1497
1498 if (session->tool->lost == perf_event__process_lost &&
1499 stats->nr_events[PERF_RECORD_LOST] != 0) {
1500 ui__warning("Processed %d events and lost %d chunks!\n\n"
1501 "Check IO/CPU overload!\n\n",
1502 stats->nr_events[0],
1503 stats->nr_events[PERF_RECORD_LOST]);
1504 }
1505
1506 if (session->tool->lost_samples == perf_event__process_lost_samples) {
1507 double drop_rate;
1508
1509 drop_rate = (double)stats->total_lost_samples /
1510 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1511 if (drop_rate > 0.05) {
1512 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%% samples!\n\n",
1513 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1514 drop_rate * 100.0);
1515 }
1516 }
1517
1518 if (session->tool->aux == perf_event__process_aux &&
1519 stats->total_aux_lost != 0) {
1520 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1521 stats->total_aux_lost,
1522 stats->nr_events[PERF_RECORD_AUX]);
1523 }
1524
1525 if (stats->nr_unknown_events != 0) {
1526 ui__warning("Found %u unknown events!\n\n"
1527 "Is this an older tool processing a perf.data "
1528 "file generated by a more recent tool?\n\n"
1529 "If that is not the case, consider "
1530 "reporting to linux-kernel@vger.kernel.org.\n\n",
1531 stats->nr_unknown_events);
1532 }
1533
1534 if (stats->nr_unknown_id != 0) {
1535 ui__warning("%u samples with id not present in the header\n",
1536 stats->nr_unknown_id);
1537 }
1538
1539 if (stats->nr_invalid_chains != 0) {
1540 ui__warning("Found invalid callchains!\n\n"
1541 "%u out of %u events were discarded for this reason.\n\n"
1542 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1543 stats->nr_invalid_chains,
1544 stats->nr_events[PERF_RECORD_SAMPLE]);
1545 }
1546
1547 if (stats->nr_unprocessable_samples != 0) {
1548 ui__warning("%u unprocessable samples recorded.\n"
1549 "Do you have a KVM guest running and not using 'perf kvm'?\n",
1550 stats->nr_unprocessable_samples);
1551 }
1552
1553 if (oe->nr_unordered_events != 0)
1554 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1555
1556 events_stats__auxtrace_error_warn(stats);
1557
1558 if (stats->nr_proc_map_timeout != 0) {
1559 ui__warning("%d map information files for pre-existing threads were\n"
1560 "not processed, if there are samples for addresses they\n"
1561 "will not be resolved, you may find out which are these\n"
1562 "threads by running with -v and redirecting the output\n"
1563 "to a file.\n"
1564 "The time limit to process proc map is too short?\n"
1565 "Increase it by --proc-map-timeout\n",
1566 stats->nr_proc_map_timeout);
1567 }
1568 }
1569
1570 static int perf_session__flush_thread_stack(struct thread *thread,
1571 void *p __maybe_unused)
1572 {
1573 return thread_stack__flush(thread);
1574 }
1575
1576 static int perf_session__flush_thread_stacks(struct perf_session *session)
1577 {
1578 return machines__for_each_thread(&session->machines,
1579 perf_session__flush_thread_stack,
1580 NULL);
1581 }
1582
1583 volatile int session_done;
1584
1585 static int __perf_session__process_pipe_events(struct perf_session *session)
1586 {
1587 struct ordered_events *oe = &session->ordered_events;
1588 struct perf_tool *tool = session->tool;
1589 int fd = perf_data_file__fd(session->file);
1590 union perf_event *event;
1591 uint32_t size, cur_size = 0;
1592 void *buf = NULL;
1593 s64 skip = 0;
1594 u64 head;
1595 ssize_t err;
1596 void *p;
1597
1598 perf_tool__fill_defaults(tool);
1599
1600 head = 0;
1601 cur_size = sizeof(union perf_event);
1602
1603 buf = malloc(cur_size);
1604 if (!buf)
1605 return -errno;
1606 more:
1607 event = buf;
1608 err = readn(fd, event, sizeof(struct perf_event_header));
1609 if (err <= 0) {
1610 if (err == 0)
1611 goto done;
1612
1613 pr_err("failed to read event header\n");
1614 goto out_err;
1615 }
1616
1617 if (session->header.needs_swap)
1618 perf_event_header__bswap(&event->header);
1619
1620 size = event->header.size;
1621 if (size < sizeof(struct perf_event_header)) {
1622 pr_err("bad event header size\n");
1623 goto out_err;
1624 }
1625
1626 if (size > cur_size) {
1627 void *new = realloc(buf, size);
1628 if (!new) {
1629 pr_err("failed to allocate memory to read event\n");
1630 goto out_err;
1631 }
1632 buf = new;
1633 cur_size = size;
1634 event = buf;
1635 }
1636 p = event;
1637 p += sizeof(struct perf_event_header);
1638
1639 if (size - sizeof(struct perf_event_header)) {
1640 err = readn(fd, p, size - sizeof(struct perf_event_header));
1641 if (err <= 0) {
1642 if (err == 0) {
1643 pr_err("unexpected end of event stream\n");
1644 goto done;
1645 }
1646
1647 pr_err("failed to read event data\n");
1648 goto out_err;
1649 }
1650 }
1651
1652 if ((skip = perf_session__process_event(session, event, head)) < 0) {
1653 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1654 head, event->header.size, event->header.type);
1655 err = -EINVAL;
1656 goto out_err;
1657 }
1658
1659 head += size;
1660
1661 if (skip > 0)
1662 head += skip;
1663
1664 if (!session_done())
1665 goto more;
1666 done:
1667 /* do the final flush for ordered samples */
1668 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1669 if (err)
1670 goto out_err;
1671 err = auxtrace__flush_events(session, tool);
1672 if (err)
1673 goto out_err;
1674 err = perf_session__flush_thread_stacks(session);
1675 out_err:
1676 free(buf);
1677 perf_session__warn_about_errors(session);
1678 ordered_events__free(&session->ordered_events);
1679 auxtrace__free_events(session);
1680 return err;
1681 }
1682
1683 static union perf_event *
1684 fetch_mmaped_event(struct perf_session *session,
1685 u64 head, size_t mmap_size, char *buf)
1686 {
1687 union perf_event *event;
1688
1689 /*
1690 * Ensure we have enough space remaining to read
1691 * the size of the event in the headers.
1692 */
1693 if (head + sizeof(event->header) > mmap_size)
1694 return NULL;
1695
1696 event = (union perf_event *)(buf + head);
1697
1698 if (session->header.needs_swap)
1699 perf_event_header__bswap(&event->header);
1700
1701 if (head + event->header.size > mmap_size) {
1702 /* We're not fetching the event so swap back again */
1703 if (session->header.needs_swap)
1704 perf_event_header__bswap(&event->header);
1705 return NULL;
1706 }
1707
1708 return event;
1709 }
1710
1711 /*
1712 * On 64bit we can mmap the data file in one go. No need for tiny mmap
1713 * slices. On 32bit we use 32MB.
1714 */
1715 #if BITS_PER_LONG == 64
1716 #define MMAP_SIZE ULLONG_MAX
1717 #define NUM_MMAPS 1
1718 #else
1719 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1720 #define NUM_MMAPS 128
1721 #endif
1722
1723 static int __perf_session__process_events(struct perf_session *session,
1724 u64 data_offset, u64 data_size,
1725 u64 file_size)
1726 {
1727 struct ordered_events *oe = &session->ordered_events;
1728 struct perf_tool *tool = session->tool;
1729 int fd = perf_data_file__fd(session->file);
1730 u64 head, page_offset, file_offset, file_pos, size;
1731 int err, mmap_prot, mmap_flags, map_idx = 0;
1732 size_t mmap_size;
1733 char *buf, *mmaps[NUM_MMAPS];
1734 union perf_event *event;
1735 struct ui_progress prog;
1736 s64 skip;
1737
1738 perf_tool__fill_defaults(tool);
1739
1740 page_offset = page_size * (data_offset / page_size);
1741 file_offset = page_offset;
1742 head = data_offset - page_offset;
1743
1744 if (data_size == 0)
1745 goto out;
1746
1747 if (data_offset + data_size < file_size)
1748 file_size = data_offset + data_size;
1749
1750 ui_progress__init(&prog, file_size, "Processing events...");
1751
1752 mmap_size = MMAP_SIZE;
1753 if (mmap_size > file_size) {
1754 mmap_size = file_size;
1755 session->one_mmap = true;
1756 }
1757
1758 memset(mmaps, 0, sizeof(mmaps));
1759
1760 mmap_prot = PROT_READ;
1761 mmap_flags = MAP_SHARED;
1762
1763 if (session->header.needs_swap) {
1764 mmap_prot |= PROT_WRITE;
1765 mmap_flags = MAP_PRIVATE;
1766 }
1767 remap:
1768 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1769 file_offset);
1770 if (buf == MAP_FAILED) {
1771 pr_err("failed to mmap file\n");
1772 err = -errno;
1773 goto out_err;
1774 }
1775 mmaps[map_idx] = buf;
1776 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1777 file_pos = file_offset + head;
1778 if (session->one_mmap) {
1779 session->one_mmap_addr = buf;
1780 session->one_mmap_offset = file_offset;
1781 }
1782
1783 more:
1784 event = fetch_mmaped_event(session, head, mmap_size, buf);
1785 if (!event) {
1786 if (mmaps[map_idx]) {
1787 munmap(mmaps[map_idx], mmap_size);
1788 mmaps[map_idx] = NULL;
1789 }
1790
1791 page_offset = page_size * (head / page_size);
1792 file_offset += page_offset;
1793 head -= page_offset;
1794 goto remap;
1795 }
1796
1797 size = event->header.size;
1798
1799 if (size < sizeof(struct perf_event_header) ||
1800 (skip = perf_session__process_event(session, event, file_pos)) < 0) {
1801 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1802 file_offset + head, event->header.size,
1803 event->header.type);
1804 err = -EINVAL;
1805 goto out_err;
1806 }
1807
1808 if (skip)
1809 size += skip;
1810
1811 head += size;
1812 file_pos += size;
1813
1814 ui_progress__update(&prog, size);
1815
1816 if (session_done())
1817 goto out;
1818
1819 if (file_pos < file_size)
1820 goto more;
1821
1822 out:
1823 /* do the final flush for ordered samples */
1824 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1825 if (err)
1826 goto out_err;
1827 err = auxtrace__flush_events(session, tool);
1828 if (err)
1829 goto out_err;
1830 err = perf_session__flush_thread_stacks(session);
1831 out_err:
1832 ui_progress__finish();
1833 perf_session__warn_about_errors(session);
1834 ordered_events__free(&session->ordered_events);
1835 auxtrace__free_events(session);
1836 session->one_mmap = false;
1837 return err;
1838 }
1839
1840 int perf_session__process_events(struct perf_session *session)
1841 {
1842 u64 size = perf_data_file__size(session->file);
1843 int err;
1844
1845 if (perf_session__register_idle_thread(session) < 0)
1846 return -ENOMEM;
1847
1848 if (!perf_data_file__is_pipe(session->file))
1849 err = __perf_session__process_events(session,
1850 session->header.data_offset,
1851 session->header.data_size, size);
1852 else
1853 err = __perf_session__process_pipe_events(session);
1854
1855 return err;
1856 }
1857
1858 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1859 {
1860 struct perf_evsel *evsel;
1861
1862 evlist__for_each(session->evlist, evsel) {
1863 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1864 return true;
1865 }
1866
1867 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1868 return false;
1869 }
1870
1871 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1872 const char *symbol_name, u64 addr)
1873 {
1874 char *bracket;
1875 enum map_type i;
1876 struct ref_reloc_sym *ref;
1877
1878 ref = zalloc(sizeof(struct ref_reloc_sym));
1879 if (ref == NULL)
1880 return -ENOMEM;
1881
1882 ref->name = strdup(symbol_name);
1883 if (ref->name == NULL) {
1884 free(ref);
1885 return -ENOMEM;
1886 }
1887
1888 bracket = strchr(ref->name, ']');
1889 if (bracket)
1890 *bracket = '\0';
1891
1892 ref->addr = addr;
1893
1894 for (i = 0; i < MAP__NR_TYPES; ++i) {
1895 struct kmap *kmap = map__kmap(maps[i]);
1896
1897 if (!kmap)
1898 continue;
1899 kmap->ref_reloc_sym = ref;
1900 }
1901
1902 return 0;
1903 }
1904
1905 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
1906 {
1907 return machines__fprintf_dsos(&session->machines, fp);
1908 }
1909
1910 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
1911 bool (skip)(struct dso *dso, int parm), int parm)
1912 {
1913 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
1914 }
1915
1916 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1917 {
1918 size_t ret;
1919 const char *msg = "";
1920
1921 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
1922 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
1923
1924 ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
1925
1926 ret += events_stats__fprintf(&session->evlist->stats, fp);
1927 return ret;
1928 }
1929
1930 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1931 {
1932 /*
1933 * FIXME: Here we have to actually print all the machines in this
1934 * session, not just the host...
1935 */
1936 return machine__fprintf(&session->machines.host, fp);
1937 }
1938
1939 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1940 unsigned int type)
1941 {
1942 struct perf_evsel *pos;
1943
1944 evlist__for_each(session->evlist, pos) {
1945 if (pos->attr.type == type)
1946 return pos;
1947 }
1948 return NULL;
1949 }
1950
1951 void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample,
1952 struct addr_location *al,
1953 unsigned int print_opts, unsigned int stack_depth)
1954 {
1955 struct callchain_cursor_node *node;
1956 int print_ip = print_opts & PRINT_IP_OPT_IP;
1957 int print_sym = print_opts & PRINT_IP_OPT_SYM;
1958 int print_dso = print_opts & PRINT_IP_OPT_DSO;
1959 int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET;
1960 int print_oneline = print_opts & PRINT_IP_OPT_ONELINE;
1961 int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE;
1962 char s = print_oneline ? ' ' : '\t';
1963
1964 if (symbol_conf.use_callchain && sample->callchain) {
1965 struct addr_location node_al;
1966
1967 if (thread__resolve_callchain(al->thread, evsel,
1968 sample, NULL, NULL,
1969 stack_depth) != 0) {
1970 if (verbose)
1971 error("Failed to resolve callchain. Skipping\n");
1972 return;
1973 }
1974 callchain_cursor_commit(&callchain_cursor);
1975
1976 if (print_symoffset)
1977 node_al = *al;
1978
1979 while (stack_depth) {
1980 u64 addr = 0;
1981
1982 node = callchain_cursor_current(&callchain_cursor);
1983 if (!node)
1984 break;
1985
1986 if (node->sym && node->sym->ignore)
1987 goto next;
1988
1989 if (print_ip)
1990 printf("%c%16" PRIx64, s, node->ip);
1991
1992 if (node->map)
1993 addr = node->map->map_ip(node->map, node->ip);
1994
1995 if (print_sym) {
1996 printf(" ");
1997 if (print_symoffset) {
1998 node_al.addr = addr;
1999 node_al.map = node->map;
2000 symbol__fprintf_symname_offs(node->sym, &node_al, stdout);
2001 } else
2002 symbol__fprintf_symname(node->sym, stdout);
2003 }
2004
2005 if (print_dso) {
2006 printf(" (");
2007 map__fprintf_dsoname(node->map, stdout);
2008 printf(")");
2009 }
2010
2011 if (print_srcline)
2012 map__fprintf_srcline(node->map, addr, "\n ",
2013 stdout);
2014
2015 if (!print_oneline)
2016 printf("\n");
2017
2018 stack_depth--;
2019 next:
2020 callchain_cursor_advance(&callchain_cursor);
2021 }
2022
2023 } else {
2024 if (al->sym && al->sym->ignore)
2025 return;
2026
2027 if (print_ip)
2028 printf("%16" PRIx64, sample->ip);
2029
2030 if (print_sym) {
2031 printf(" ");
2032 if (print_symoffset)
2033 symbol__fprintf_symname_offs(al->sym, al,
2034 stdout);
2035 else
2036 symbol__fprintf_symname(al->sym, stdout);
2037 }
2038
2039 if (print_dso) {
2040 printf(" (");
2041 map__fprintf_dsoname(al->map, stdout);
2042 printf(")");
2043 }
2044
2045 if (print_srcline)
2046 map__fprintf_srcline(al->map, al->addr, "\n ", stdout);
2047 }
2048 }
2049
2050 int perf_session__cpu_bitmap(struct perf_session *session,
2051 const char *cpu_list, unsigned long *cpu_bitmap)
2052 {
2053 int i, err = -1;
2054 struct cpu_map *map;
2055
2056 for (i = 0; i < PERF_TYPE_MAX; ++i) {
2057 struct perf_evsel *evsel;
2058
2059 evsel = perf_session__find_first_evtype(session, i);
2060 if (!evsel)
2061 continue;
2062
2063 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
2064 pr_err("File does not contain CPU events. "
2065 "Remove -c option to proceed.\n");
2066 return -1;
2067 }
2068 }
2069
2070 map = cpu_map__new(cpu_list);
2071 if (map == NULL) {
2072 pr_err("Invalid cpu_list\n");
2073 return -1;
2074 }
2075
2076 for (i = 0; i < map->nr; i++) {
2077 int cpu = map->map[i];
2078
2079 if (cpu >= MAX_NR_CPUS) {
2080 pr_err("Requested CPU %d too large. "
2081 "Consider raising MAX_NR_CPUS\n", cpu);
2082 goto out_delete_map;
2083 }
2084
2085 set_bit(cpu, cpu_bitmap);
2086 }
2087
2088 err = 0;
2089
2090 out_delete_map:
2091 cpu_map__put(map);
2092 return err;
2093 }
2094
2095 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
2096 bool full)
2097 {
2098 struct stat st;
2099 int fd, ret;
2100
2101 if (session == NULL || fp == NULL)
2102 return;
2103
2104 fd = perf_data_file__fd(session->file);
2105
2106 ret = fstat(fd, &st);
2107 if (ret == -1)
2108 return;
2109
2110 fprintf(fp, "# ========\n");
2111 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
2112 perf_header__fprintf_info(session, fp, full);
2113 fprintf(fp, "# ========\n#\n");
2114 }
2115
2116
2117 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
2118 const struct perf_evsel_str_handler *assocs,
2119 size_t nr_assocs)
2120 {
2121 struct perf_evsel *evsel;
2122 size_t i;
2123 int err;
2124
2125 for (i = 0; i < nr_assocs; i++) {
2126 /*
2127 * Adding a handler for an event not in the session,
2128 * just ignore it.
2129 */
2130 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
2131 if (evsel == NULL)
2132 continue;
2133
2134 err = -EEXIST;
2135 if (evsel->handler != NULL)
2136 goto out;
2137 evsel->handler = assocs[i].handler;
2138 }
2139
2140 err = 0;
2141 out:
2142 return err;
2143 }
2144
2145 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused,
2146 union perf_event *event,
2147 struct perf_session *session)
2148 {
2149 struct perf_evlist *evlist = session->evlist;
2150 struct id_index_event *ie = &event->id_index;
2151 size_t i, nr, max_nr;
2152
2153 max_nr = (ie->header.size - sizeof(struct id_index_event)) /
2154 sizeof(struct id_index_entry);
2155 nr = ie->nr;
2156 if (nr > max_nr)
2157 return -EINVAL;
2158
2159 if (dump_trace)
2160 fprintf(stdout, " nr: %zu\n", nr);
2161
2162 for (i = 0; i < nr; i++) {
2163 struct id_index_entry *e = &ie->entries[i];
2164 struct perf_sample_id *sid;
2165
2166 if (dump_trace) {
2167 fprintf(stdout, " ... id: %"PRIu64, e->id);
2168 fprintf(stdout, " idx: %"PRIu64, e->idx);
2169 fprintf(stdout, " cpu: %"PRId64, e->cpu);
2170 fprintf(stdout, " tid: %"PRId64"\n", e->tid);
2171 }
2172
2173 sid = perf_evlist__id2sid(evlist, e->id);
2174 if (!sid)
2175 return -ENOENT;
2176 sid->idx = e->idx;
2177 sid->cpu = e->cpu;
2178 sid->tid = e->tid;
2179 }
2180 return 0;
2181 }
2182
2183 int perf_event__synthesize_id_index(struct perf_tool *tool,
2184 perf_event__handler_t process,
2185 struct perf_evlist *evlist,
2186 struct machine *machine)
2187 {
2188 union perf_event *ev;
2189 struct perf_evsel *evsel;
2190 size_t nr = 0, i = 0, sz, max_nr, n;
2191 int err;
2192
2193 pr_debug2("Synthesizing id index\n");
2194
2195 max_nr = (UINT16_MAX - sizeof(struct id_index_event)) /
2196 sizeof(struct id_index_entry);
2197
2198 evlist__for_each(evlist, evsel)
2199 nr += evsel->ids;
2200
2201 n = nr > max_nr ? max_nr : nr;
2202 sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry);
2203 ev = zalloc(sz);
2204 if (!ev)
2205 return -ENOMEM;
2206
2207 ev->id_index.header.type = PERF_RECORD_ID_INDEX;
2208 ev->id_index.header.size = sz;
2209 ev->id_index.nr = n;
2210
2211 evlist__for_each(evlist, evsel) {
2212 u32 j;
2213
2214 for (j = 0; j < evsel->ids; j++) {
2215 struct id_index_entry *e;
2216 struct perf_sample_id *sid;
2217
2218 if (i >= n) {
2219 err = process(tool, ev, NULL, machine);
2220 if (err)
2221 goto out_err;
2222 nr -= n;
2223 i = 0;
2224 }
2225
2226 e = &ev->id_index.entries[i++];
2227
2228 e->id = evsel->id[j];
2229
2230 sid = perf_evlist__id2sid(evlist, e->id);
2231 if (!sid) {
2232 free(ev);
2233 return -ENOENT;
2234 }
2235
2236 e->idx = sid->idx;
2237 e->cpu = sid->cpu;
2238 e->tid = sid->tid;
2239 }
2240 }
2241
2242 sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry);
2243 ev->id_index.header.size = sz;
2244 ev->id_index.nr = nr;
2245
2246 err = process(tool, ev, NULL, machine);
2247 out_err:
2248 free(ev);
2249
2250 return err;
2251 }
Linux kernel - Deliverables
This page took 0.075615 seconds and 6 git commands to generate.