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ARM: dts: sun8i: Add dts file for the Orange Pi One SBC
[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 struct machine *machine;
1111
1112 if (perf_guest &&
1113 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1114 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1115 u32 pid;
1116
1117 if (event->header.type == PERF_RECORD_MMAP
1118 || event->header.type == PERF_RECORD_MMAP2)
1119 pid = event->mmap.pid;
1120 else
1121 pid = sample->pid;
1122
1123 machine = machines__find(machines, pid);
1124 if (!machine)
1125 machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID);
1126 return machine;
1127 }
1128
1129 return &machines->host;
1130 }
1131
1132 static int deliver_sample_value(struct perf_evlist *evlist,
1133 struct perf_tool *tool,
1134 union perf_event *event,
1135 struct perf_sample *sample,
1136 struct sample_read_value *v,
1137 struct machine *machine)
1138 {
1139 struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
1140
1141 if (sid) {
1142 sample->id = v->id;
1143 sample->period = v->value - sid->period;
1144 sid->period = v->value;
1145 }
1146
1147 if (!sid || sid->evsel == NULL) {
1148 ++evlist->stats.nr_unknown_id;
1149 return 0;
1150 }
1151
1152 return tool->sample(tool, event, sample, sid->evsel, machine);
1153 }
1154
1155 static int deliver_sample_group(struct perf_evlist *evlist,
1156 struct perf_tool *tool,
1157 union perf_event *event,
1158 struct perf_sample *sample,
1159 struct machine *machine)
1160 {
1161 int ret = -EINVAL;
1162 u64 i;
1163
1164 for (i = 0; i < sample->read.group.nr; i++) {
1165 ret = deliver_sample_value(evlist, tool, event, sample,
1166 &sample->read.group.values[i],
1167 machine);
1168 if (ret)
1169 break;
1170 }
1171
1172 return ret;
1173 }
1174
1175 static int
1176 perf_evlist__deliver_sample(struct perf_evlist *evlist,
1177 struct perf_tool *tool,
1178 union perf_event *event,
1179 struct perf_sample *sample,
1180 struct perf_evsel *evsel,
1181 struct machine *machine)
1182 {
1183 /* We know evsel != NULL. */
1184 u64 sample_type = evsel->attr.sample_type;
1185 u64 read_format = evsel->attr.read_format;
1186
1187 /* Standard sample delievery. */
1188 if (!(sample_type & PERF_SAMPLE_READ))
1189 return tool->sample(tool, event, sample, evsel, machine);
1190
1191 /* For PERF_SAMPLE_READ we have either single or group mode. */
1192 if (read_format & PERF_FORMAT_GROUP)
1193 return deliver_sample_group(evlist, tool, event, sample,
1194 machine);
1195 else
1196 return deliver_sample_value(evlist, tool, event, sample,
1197 &sample->read.one, machine);
1198 }
1199
1200 static int machines__deliver_event(struct machines *machines,
1201 struct perf_evlist *evlist,
1202 union perf_event *event,
1203 struct perf_sample *sample,
1204 struct perf_tool *tool, u64 file_offset)
1205 {
1206 struct perf_evsel *evsel;
1207 struct machine *machine;
1208
1209 dump_event(evlist, event, file_offset, sample);
1210
1211 evsel = perf_evlist__id2evsel(evlist, sample->id);
1212
1213 machine = machines__find_for_cpumode(machines, event, sample);
1214
1215 switch (event->header.type) {
1216 case PERF_RECORD_SAMPLE:
1217 if (evsel == NULL) {
1218 ++evlist->stats.nr_unknown_id;
1219 return 0;
1220 }
1221 dump_sample(evsel, event, sample);
1222 if (machine == NULL) {
1223 ++evlist->stats.nr_unprocessable_samples;
1224 return 0;
1225 }
1226 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1227 case PERF_RECORD_MMAP:
1228 return tool->mmap(tool, event, sample, machine);
1229 case PERF_RECORD_MMAP2:
1230 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1231 ++evlist->stats.nr_proc_map_timeout;
1232 return tool->mmap2(tool, event, sample, machine);
1233 case PERF_RECORD_COMM:
1234 return tool->comm(tool, event, sample, machine);
1235 case PERF_RECORD_FORK:
1236 return tool->fork(tool, event, sample, machine);
1237 case PERF_RECORD_EXIT:
1238 return tool->exit(tool, event, sample, machine);
1239 case PERF_RECORD_LOST:
1240 if (tool->lost == perf_event__process_lost)
1241 evlist->stats.total_lost += event->lost.lost;
1242 return tool->lost(tool, event, sample, machine);
1243 case PERF_RECORD_LOST_SAMPLES:
1244 if (tool->lost_samples == perf_event__process_lost_samples)
1245 evlist->stats.total_lost_samples += event->lost_samples.lost;
1246 return tool->lost_samples(tool, event, sample, machine);
1247 case PERF_RECORD_READ:
1248 return tool->read(tool, event, sample, evsel, machine);
1249 case PERF_RECORD_THROTTLE:
1250 return tool->throttle(tool, event, sample, machine);
1251 case PERF_RECORD_UNTHROTTLE:
1252 return tool->unthrottle(tool, event, sample, machine);
1253 case PERF_RECORD_AUX:
1254 if (tool->aux == perf_event__process_aux &&
1255 (event->aux.flags & PERF_AUX_FLAG_TRUNCATED))
1256 evlist->stats.total_aux_lost += 1;
1257 return tool->aux(tool, event, sample, machine);
1258 case PERF_RECORD_ITRACE_START:
1259 return tool->itrace_start(tool, event, sample, machine);
1260 case PERF_RECORD_SWITCH:
1261 case PERF_RECORD_SWITCH_CPU_WIDE:
1262 return tool->context_switch(tool, event, sample, machine);
1263 default:
1264 ++evlist->stats.nr_unknown_events;
1265 return -1;
1266 }
1267 }
1268
1269 static int perf_session__deliver_event(struct perf_session *session,
1270 union perf_event *event,
1271 struct perf_sample *sample,
1272 struct perf_tool *tool,
1273 u64 file_offset)
1274 {
1275 int ret;
1276
1277 ret = auxtrace__process_event(session, event, sample, tool);
1278 if (ret < 0)
1279 return ret;
1280 if (ret > 0)
1281 return 0;
1282
1283 return machines__deliver_event(&session->machines, session->evlist,
1284 event, sample, tool, file_offset);
1285 }
1286
1287 static s64 perf_session__process_user_event(struct perf_session *session,
1288 union perf_event *event,
1289 u64 file_offset)
1290 {
1291 struct ordered_events *oe = &session->ordered_events;
1292 struct perf_tool *tool = session->tool;
1293 int fd = perf_data_file__fd(session->file);
1294 int err;
1295
1296 dump_event(session->evlist, event, file_offset, NULL);
1297
1298 /* These events are processed right away */
1299 switch (event->header.type) {
1300 case PERF_RECORD_HEADER_ATTR:
1301 err = tool->attr(tool, event, &session->evlist);
1302 if (err == 0) {
1303 perf_session__set_id_hdr_size(session);
1304 perf_session__set_comm_exec(session);
1305 }
1306 return err;
1307 case PERF_RECORD_EVENT_UPDATE:
1308 return tool->event_update(tool, event, &session->evlist);
1309 case PERF_RECORD_HEADER_EVENT_TYPE:
1310 /*
1311 * Depreceated, but we need to handle it for sake
1312 * of old data files create in pipe mode.
1313 */
1314 return 0;
1315 case PERF_RECORD_HEADER_TRACING_DATA:
1316 /* setup for reading amidst mmap */
1317 lseek(fd, file_offset, SEEK_SET);
1318 return tool->tracing_data(tool, event, session);
1319 case PERF_RECORD_HEADER_BUILD_ID:
1320 return tool->build_id(tool, event, session);
1321 case PERF_RECORD_FINISHED_ROUND:
1322 return tool->finished_round(tool, event, oe);
1323 case PERF_RECORD_ID_INDEX:
1324 return tool->id_index(tool, event, session);
1325 case PERF_RECORD_AUXTRACE_INFO:
1326 return tool->auxtrace_info(tool, event, session);
1327 case PERF_RECORD_AUXTRACE:
1328 /* setup for reading amidst mmap */
1329 lseek(fd, file_offset + event->header.size, SEEK_SET);
1330 return tool->auxtrace(tool, event, session);
1331 case PERF_RECORD_AUXTRACE_ERROR:
1332 perf_session__auxtrace_error_inc(session, event);
1333 return tool->auxtrace_error(tool, event, session);
1334 case PERF_RECORD_THREAD_MAP:
1335 return tool->thread_map(tool, event, session);
1336 case PERF_RECORD_CPU_MAP:
1337 return tool->cpu_map(tool, event, session);
1338 case PERF_RECORD_STAT_CONFIG:
1339 return tool->stat_config(tool, event, session);
1340 case PERF_RECORD_STAT:
1341 return tool->stat(tool, event, session);
1342 case PERF_RECORD_STAT_ROUND:
1343 return tool->stat_round(tool, event, session);
1344 default:
1345 return -EINVAL;
1346 }
1347 }
1348
1349 int perf_session__deliver_synth_event(struct perf_session *session,
1350 union perf_event *event,
1351 struct perf_sample *sample)
1352 {
1353 struct perf_evlist *evlist = session->evlist;
1354 struct perf_tool *tool = session->tool;
1355
1356 events_stats__inc(&evlist->stats, event->header.type);
1357
1358 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1359 return perf_session__process_user_event(session, event, 0);
1360
1361 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0);
1362 }
1363
1364 static void event_swap(union perf_event *event, bool sample_id_all)
1365 {
1366 perf_event__swap_op swap;
1367
1368 swap = perf_event__swap_ops[event->header.type];
1369 if (swap)
1370 swap(event, sample_id_all);
1371 }
1372
1373 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1374 void *buf, size_t buf_sz,
1375 union perf_event **event_ptr,
1376 struct perf_sample *sample)
1377 {
1378 union perf_event *event;
1379 size_t hdr_sz, rest;
1380 int fd;
1381
1382 if (session->one_mmap && !session->header.needs_swap) {
1383 event = file_offset - session->one_mmap_offset +
1384 session->one_mmap_addr;
1385 goto out_parse_sample;
1386 }
1387
1388 if (perf_data_file__is_pipe(session->file))
1389 return -1;
1390
1391 fd = perf_data_file__fd(session->file);
1392 hdr_sz = sizeof(struct perf_event_header);
1393
1394 if (buf_sz < hdr_sz)
1395 return -1;
1396
1397 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1398 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1399 return -1;
1400
1401 event = (union perf_event *)buf;
1402
1403 if (session->header.needs_swap)
1404 perf_event_header__bswap(&event->header);
1405
1406 if (event->header.size < hdr_sz || event->header.size > buf_sz)
1407 return -1;
1408
1409 rest = event->header.size - hdr_sz;
1410
1411 if (readn(fd, buf, rest) != (ssize_t)rest)
1412 return -1;
1413
1414 if (session->header.needs_swap)
1415 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1416
1417 out_parse_sample:
1418
1419 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1420 perf_evlist__parse_sample(session->evlist, event, sample))
1421 return -1;
1422
1423 *event_ptr = event;
1424
1425 return 0;
1426 }
1427
1428 static s64 perf_session__process_event(struct perf_session *session,
1429 union perf_event *event, u64 file_offset)
1430 {
1431 struct perf_evlist *evlist = session->evlist;
1432 struct perf_tool *tool = session->tool;
1433 struct perf_sample sample;
1434 int ret;
1435
1436 if (session->header.needs_swap)
1437 event_swap(event, perf_evlist__sample_id_all(evlist));
1438
1439 if (event->header.type >= PERF_RECORD_HEADER_MAX)
1440 return -EINVAL;
1441
1442 events_stats__inc(&evlist->stats, event->header.type);
1443
1444 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1445 return perf_session__process_user_event(session, event, file_offset);
1446
1447 /*
1448 * For all kernel events we get the sample data
1449 */
1450 ret = perf_evlist__parse_sample(evlist, event, &sample);
1451 if (ret)
1452 return ret;
1453
1454 if (tool->ordered_events) {
1455 ret = perf_session__queue_event(session, event, &sample, file_offset);
1456 if (ret != -ETIME)
1457 return ret;
1458 }
1459
1460 return perf_session__deliver_event(session, event, &sample, tool,
1461 file_offset);
1462 }
1463
1464 void perf_event_header__bswap(struct perf_event_header *hdr)
1465 {
1466 hdr->type = bswap_32(hdr->type);
1467 hdr->misc = bswap_16(hdr->misc);
1468 hdr->size = bswap_16(hdr->size);
1469 }
1470
1471 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1472 {
1473 return machine__findnew_thread(&session->machines.host, -1, pid);
1474 }
1475
1476 int perf_session__register_idle_thread(struct perf_session *session)
1477 {
1478 struct thread *thread;
1479 int err = 0;
1480
1481 thread = machine__findnew_thread(&session->machines.host, 0, 0);
1482 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1483 pr_err("problem inserting idle task.\n");
1484 err = -1;
1485 }
1486
1487 /* machine__findnew_thread() got the thread, so put it */
1488 thread__put(thread);
1489 return err;
1490 }
1491
1492 static void perf_session__warn_about_errors(const struct perf_session *session)
1493 {
1494 const struct events_stats *stats = &session->evlist->stats;
1495 const struct ordered_events *oe = &session->ordered_events;
1496
1497 if (session->tool->lost == perf_event__process_lost &&
1498 stats->nr_events[PERF_RECORD_LOST] != 0) {
1499 ui__warning("Processed %d events and lost %d chunks!\n\n"
1500 "Check IO/CPU overload!\n\n",
1501 stats->nr_events[0],
1502 stats->nr_events[PERF_RECORD_LOST]);
1503 }
1504
1505 if (session->tool->lost_samples == perf_event__process_lost_samples) {
1506 double drop_rate;
1507
1508 drop_rate = (double)stats->total_lost_samples /
1509 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1510 if (drop_rate > 0.05) {
1511 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%% samples!\n\n",
1512 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1513 drop_rate * 100.0);
1514 }
1515 }
1516
1517 if (session->tool->aux == perf_event__process_aux &&
1518 stats->total_aux_lost != 0) {
1519 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1520 stats->total_aux_lost,
1521 stats->nr_events[PERF_RECORD_AUX]);
1522 }
1523
1524 if (stats->nr_unknown_events != 0) {
1525 ui__warning("Found %u unknown events!\n\n"
1526 "Is this an older tool processing a perf.data "
1527 "file generated by a more recent tool?\n\n"
1528 "If that is not the case, consider "
1529 "reporting to linux-kernel@vger.kernel.org.\n\n",
1530 stats->nr_unknown_events);
1531 }
1532
1533 if (stats->nr_unknown_id != 0) {
1534 ui__warning("%u samples with id not present in the header\n",
1535 stats->nr_unknown_id);
1536 }
1537
1538 if (stats->nr_invalid_chains != 0) {
1539 ui__warning("Found invalid callchains!\n\n"
1540 "%u out of %u events were discarded for this reason.\n\n"
1541 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1542 stats->nr_invalid_chains,
1543 stats->nr_events[PERF_RECORD_SAMPLE]);
1544 }
1545
1546 if (stats->nr_unprocessable_samples != 0) {
1547 ui__warning("%u unprocessable samples recorded.\n"
1548 "Do you have a KVM guest running and not using 'perf kvm'?\n",
1549 stats->nr_unprocessable_samples);
1550 }
1551
1552 if (oe->nr_unordered_events != 0)
1553 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1554
1555 events_stats__auxtrace_error_warn(stats);
1556
1557 if (stats->nr_proc_map_timeout != 0) {
1558 ui__warning("%d map information files for pre-existing threads were\n"
1559 "not processed, if there are samples for addresses they\n"
1560 "will not be resolved, you may find out which are these\n"
1561 "threads by running with -v and redirecting the output\n"
1562 "to a file.\n"
1563 "The time limit to process proc map is too short?\n"
1564 "Increase it by --proc-map-timeout\n",
1565 stats->nr_proc_map_timeout);
1566 }
1567 }
1568
1569 static int perf_session__flush_thread_stack(struct thread *thread,
1570 void *p __maybe_unused)
1571 {
1572 return thread_stack__flush(thread);
1573 }
1574
1575 static int perf_session__flush_thread_stacks(struct perf_session *session)
1576 {
1577 return machines__for_each_thread(&session->machines,
1578 perf_session__flush_thread_stack,
1579 NULL);
1580 }
1581
1582 volatile int session_done;
1583
1584 static int __perf_session__process_pipe_events(struct perf_session *session)
1585 {
1586 struct ordered_events *oe = &session->ordered_events;
1587 struct perf_tool *tool = session->tool;
1588 int fd = perf_data_file__fd(session->file);
1589 union perf_event *event;
1590 uint32_t size, cur_size = 0;
1591 void *buf = NULL;
1592 s64 skip = 0;
1593 u64 head;
1594 ssize_t err;
1595 void *p;
1596
1597 perf_tool__fill_defaults(tool);
1598
1599 head = 0;
1600 cur_size = sizeof(union perf_event);
1601
1602 buf = malloc(cur_size);
1603 if (!buf)
1604 return -errno;
1605 more:
1606 event = buf;
1607 err = readn(fd, event, sizeof(struct perf_event_header));
1608 if (err <= 0) {
1609 if (err == 0)
1610 goto done;
1611
1612 pr_err("failed to read event header\n");
1613 goto out_err;
1614 }
1615
1616 if (session->header.needs_swap)
1617 perf_event_header__bswap(&event->header);
1618
1619 size = event->header.size;
1620 if (size < sizeof(struct perf_event_header)) {
1621 pr_err("bad event header size\n");
1622 goto out_err;
1623 }
1624
1625 if (size > cur_size) {
1626 void *new = realloc(buf, size);
1627 if (!new) {
1628 pr_err("failed to allocate memory to read event\n");
1629 goto out_err;
1630 }
1631 buf = new;
1632 cur_size = size;
1633 event = buf;
1634 }
1635 p = event;
1636 p += sizeof(struct perf_event_header);
1637
1638 if (size - sizeof(struct perf_event_header)) {
1639 err = readn(fd, p, size - sizeof(struct perf_event_header));
1640 if (err <= 0) {
1641 if (err == 0) {
1642 pr_err("unexpected end of event stream\n");
1643 goto done;
1644 }
1645
1646 pr_err("failed to read event data\n");
1647 goto out_err;
1648 }
1649 }
1650
1651 if ((skip = perf_session__process_event(session, event, head)) < 0) {
1652 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1653 head, event->header.size, event->header.type);
1654 err = -EINVAL;
1655 goto out_err;
1656 }
1657
1658 head += size;
1659
1660 if (skip > 0)
1661 head += skip;
1662
1663 if (!session_done())
1664 goto more;
1665 done:
1666 /* do the final flush for ordered samples */
1667 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1668 if (err)
1669 goto out_err;
1670 err = auxtrace__flush_events(session, tool);
1671 if (err)
1672 goto out_err;
1673 err = perf_session__flush_thread_stacks(session);
1674 out_err:
1675 free(buf);
1676 perf_session__warn_about_errors(session);
1677 ordered_events__free(&session->ordered_events);
1678 auxtrace__free_events(session);
1679 return err;
1680 }
1681
1682 static union perf_event *
1683 fetch_mmaped_event(struct perf_session *session,
1684 u64 head, size_t mmap_size, char *buf)
1685 {
1686 union perf_event *event;
1687
1688 /*
1689 * Ensure we have enough space remaining to read
1690 * the size of the event in the headers.
1691 */
1692 if (head + sizeof(event->header) > mmap_size)
1693 return NULL;
1694
1695 event = (union perf_event *)(buf + head);
1696
1697 if (session->header.needs_swap)
1698 perf_event_header__bswap(&event->header);
1699
1700 if (head + event->header.size > mmap_size) {
1701 /* We're not fetching the event so swap back again */
1702 if (session->header.needs_swap)
1703 perf_event_header__bswap(&event->header);
1704 return NULL;
1705 }
1706
1707 return event;
1708 }
1709
1710 /*
1711 * On 64bit we can mmap the data file in one go. No need for tiny mmap
1712 * slices. On 32bit we use 32MB.
1713 */
1714 #if BITS_PER_LONG == 64
1715 #define MMAP_SIZE ULLONG_MAX
1716 #define NUM_MMAPS 1
1717 #else
1718 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1719 #define NUM_MMAPS 128
1720 #endif
1721
1722 static int __perf_session__process_events(struct perf_session *session,
1723 u64 data_offset, u64 data_size,
1724 u64 file_size)
1725 {
1726 struct ordered_events *oe = &session->ordered_events;
1727 struct perf_tool *tool = session->tool;
1728 int fd = perf_data_file__fd(session->file);
1729 u64 head, page_offset, file_offset, file_pos, size;
1730 int err, mmap_prot, mmap_flags, map_idx = 0;
1731 size_t mmap_size;
1732 char *buf, *mmaps[NUM_MMAPS];
1733 union perf_event *event;
1734 struct ui_progress prog;
1735 s64 skip;
1736
1737 perf_tool__fill_defaults(tool);
1738
1739 page_offset = page_size * (data_offset / page_size);
1740 file_offset = page_offset;
1741 head = data_offset - page_offset;
1742
1743 if (data_size == 0)
1744 goto out;
1745
1746 if (data_offset + data_size < file_size)
1747 file_size = data_offset + data_size;
1748
1749 ui_progress__init(&prog, file_size, "Processing events...");
1750
1751 mmap_size = MMAP_SIZE;
1752 if (mmap_size > file_size) {
1753 mmap_size = file_size;
1754 session->one_mmap = true;
1755 }
1756
1757 memset(mmaps, 0, sizeof(mmaps));
1758
1759 mmap_prot = PROT_READ;
1760 mmap_flags = MAP_SHARED;
1761
1762 if (session->header.needs_swap) {
1763 mmap_prot |= PROT_WRITE;
1764 mmap_flags = MAP_PRIVATE;
1765 }
1766 remap:
1767 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1768 file_offset);
1769 if (buf == MAP_FAILED) {
1770 pr_err("failed to mmap file\n");
1771 err = -errno;
1772 goto out_err;
1773 }
1774 mmaps[map_idx] = buf;
1775 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1776 file_pos = file_offset + head;
1777 if (session->one_mmap) {
1778 session->one_mmap_addr = buf;
1779 session->one_mmap_offset = file_offset;
1780 }
1781
1782 more:
1783 event = fetch_mmaped_event(session, head, mmap_size, buf);
1784 if (!event) {
1785 if (mmaps[map_idx]) {
1786 munmap(mmaps[map_idx], mmap_size);
1787 mmaps[map_idx] = NULL;
1788 }
1789
1790 page_offset = page_size * (head / page_size);
1791 file_offset += page_offset;
1792 head -= page_offset;
1793 goto remap;
1794 }
1795
1796 size = event->header.size;
1797
1798 if (size < sizeof(struct perf_event_header) ||
1799 (skip = perf_session__process_event(session, event, file_pos)) < 0) {
1800 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1801 file_offset + head, event->header.size,
1802 event->header.type);
1803 err = -EINVAL;
1804 goto out_err;
1805 }
1806
1807 if (skip)
1808 size += skip;
1809
1810 head += size;
1811 file_pos += size;
1812
1813 ui_progress__update(&prog, size);
1814
1815 if (session_done())
1816 goto out;
1817
1818 if (file_pos < file_size)
1819 goto more;
1820
1821 out:
1822 /* do the final flush for ordered samples */
1823 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1824 if (err)
1825 goto out_err;
1826 err = auxtrace__flush_events(session, tool);
1827 if (err)
1828 goto out_err;
1829 err = perf_session__flush_thread_stacks(session);
1830 out_err:
1831 ui_progress__finish();
1832 perf_session__warn_about_errors(session);
1833 ordered_events__free(&session->ordered_events);
1834 auxtrace__free_events(session);
1835 session->one_mmap = false;
1836 return err;
1837 }
1838
1839 int perf_session__process_events(struct perf_session *session)
1840 {
1841 u64 size = perf_data_file__size(session->file);
1842 int err;
1843
1844 if (perf_session__register_idle_thread(session) < 0)
1845 return -ENOMEM;
1846
1847 if (!perf_data_file__is_pipe(session->file))
1848 err = __perf_session__process_events(session,
1849 session->header.data_offset,
1850 session->header.data_size, size);
1851 else
1852 err = __perf_session__process_pipe_events(session);
1853
1854 return err;
1855 }
1856
1857 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1858 {
1859 struct perf_evsel *evsel;
1860
1861 evlist__for_each(session->evlist, evsel) {
1862 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1863 return true;
1864 }
1865
1866 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1867 return false;
1868 }
1869
1870 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1871 const char *symbol_name, u64 addr)
1872 {
1873 char *bracket;
1874 enum map_type i;
1875 struct ref_reloc_sym *ref;
1876
1877 ref = zalloc(sizeof(struct ref_reloc_sym));
1878 if (ref == NULL)
1879 return -ENOMEM;
1880
1881 ref->name = strdup(symbol_name);
1882 if (ref->name == NULL) {
1883 free(ref);
1884 return -ENOMEM;
1885 }
1886
1887 bracket = strchr(ref->name, ']');
1888 if (bracket)
1889 *bracket = '\0';
1890
1891 ref->addr = addr;
1892
1893 for (i = 0; i < MAP__NR_TYPES; ++i) {
1894 struct kmap *kmap = map__kmap(maps[i]);
1895
1896 if (!kmap)
1897 continue;
1898 kmap->ref_reloc_sym = ref;
1899 }
1900
1901 return 0;
1902 }
1903
1904 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
1905 {
1906 return machines__fprintf_dsos(&session->machines, fp);
1907 }
1908
1909 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
1910 bool (skip)(struct dso *dso, int parm), int parm)
1911 {
1912 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
1913 }
1914
1915 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1916 {
1917 size_t ret;
1918 const char *msg = "";
1919
1920 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
1921 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
1922
1923 ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
1924
1925 ret += events_stats__fprintf(&session->evlist->stats, fp);
1926 return ret;
1927 }
1928
1929 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1930 {
1931 /*
1932 * FIXME: Here we have to actually print all the machines in this
1933 * session, not just the host...
1934 */
1935 return machine__fprintf(&session->machines.host, fp);
1936 }
1937
1938 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1939 unsigned int type)
1940 {
1941 struct perf_evsel *pos;
1942
1943 evlist__for_each(session->evlist, pos) {
1944 if (pos->attr.type == type)
1945 return pos;
1946 }
1947 return NULL;
1948 }
1949
1950 void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample,
1951 struct addr_location *al,
1952 unsigned int print_opts, unsigned int stack_depth)
1953 {
1954 struct callchain_cursor_node *node;
1955 int print_ip = print_opts & PRINT_IP_OPT_IP;
1956 int print_sym = print_opts & PRINT_IP_OPT_SYM;
1957 int print_dso = print_opts & PRINT_IP_OPT_DSO;
1958 int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET;
1959 int print_oneline = print_opts & PRINT_IP_OPT_ONELINE;
1960 int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE;
1961 char s = print_oneline ? ' ' : '\t';
1962
1963 if (symbol_conf.use_callchain && sample->callchain) {
1964 struct addr_location node_al;
1965
1966 if (thread__resolve_callchain(al->thread, evsel,
1967 sample, NULL, NULL,
1968 stack_depth) != 0) {
1969 if (verbose)
1970 error("Failed to resolve callchain. Skipping\n");
1971 return;
1972 }
1973 callchain_cursor_commit(&callchain_cursor);
1974
1975 if (print_symoffset)
1976 node_al = *al;
1977
1978 while (stack_depth) {
1979 u64 addr = 0;
1980
1981 node = callchain_cursor_current(&callchain_cursor);
1982 if (!node)
1983 break;
1984
1985 if (node->sym && node->sym->ignore)
1986 goto next;
1987
1988 if (print_ip)
1989 printf("%c%16" PRIx64, s, node->ip);
1990
1991 if (node->map)
1992 addr = node->map->map_ip(node->map, node->ip);
1993
1994 if (print_sym) {
1995 printf(" ");
1996 if (print_symoffset) {
1997 node_al.addr = addr;
1998 node_al.map = node->map;
1999 symbol__fprintf_symname_offs(node->sym, &node_al, stdout);
2000 } else
2001 symbol__fprintf_symname(node->sym, stdout);
2002 }
2003
2004 if (print_dso) {
2005 printf(" (");
2006 map__fprintf_dsoname(node->map, stdout);
2007 printf(")");
2008 }
2009
2010 if (print_srcline)
2011 map__fprintf_srcline(node->map, addr, "\n ",
2012 stdout);
2013
2014 if (!print_oneline)
2015 printf("\n");
2016
2017 stack_depth--;
2018 next:
2019 callchain_cursor_advance(&callchain_cursor);
2020 }
2021
2022 } else {
2023 if (al->sym && al->sym->ignore)
2024 return;
2025
2026 if (print_ip)
2027 printf("%16" PRIx64, sample->ip);
2028
2029 if (print_sym) {
2030 printf(" ");
2031 if (print_symoffset)
2032 symbol__fprintf_symname_offs(al->sym, al,
2033 stdout);
2034 else
2035 symbol__fprintf_symname(al->sym, stdout);
2036 }
2037
2038 if (print_dso) {
2039 printf(" (");
2040 map__fprintf_dsoname(al->map, stdout);
2041 printf(")");
2042 }
2043
2044 if (print_srcline)
2045 map__fprintf_srcline(al->map, al->addr, "\n ", stdout);
2046 }
2047 }
2048
2049 int perf_session__cpu_bitmap(struct perf_session *session,
2050 const char *cpu_list, unsigned long *cpu_bitmap)
2051 {
2052 int i, err = -1;
2053 struct cpu_map *map;
2054
2055 for (i = 0; i < PERF_TYPE_MAX; ++i) {
2056 struct perf_evsel *evsel;
2057
2058 evsel = perf_session__find_first_evtype(session, i);
2059 if (!evsel)
2060 continue;
2061
2062 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
2063 pr_err("File does not contain CPU events. "
2064 "Remove -c option to proceed.\n");
2065 return -1;
2066 }
2067 }
2068
2069 map = cpu_map__new(cpu_list);
2070 if (map == NULL) {
2071 pr_err("Invalid cpu_list\n");
2072 return -1;
2073 }
2074
2075 for (i = 0; i < map->nr; i++) {
2076 int cpu = map->map[i];
2077
2078 if (cpu >= MAX_NR_CPUS) {
2079 pr_err("Requested CPU %d too large. "
2080 "Consider raising MAX_NR_CPUS\n", cpu);
2081 goto out_delete_map;
2082 }
2083
2084 set_bit(cpu, cpu_bitmap);
2085 }
2086
2087 err = 0;
2088
2089 out_delete_map:
2090 cpu_map__put(map);
2091 return err;
2092 }
2093
2094 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
2095 bool full)
2096 {
2097 struct stat st;
2098 int fd, ret;
2099
2100 if (session == NULL || fp == NULL)
2101 return;
2102
2103 fd = perf_data_file__fd(session->file);
2104
2105 ret = fstat(fd, &st);
2106 if (ret == -1)
2107 return;
2108
2109 fprintf(fp, "# ========\n");
2110 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
2111 perf_header__fprintf_info(session, fp, full);
2112 fprintf(fp, "# ========\n#\n");
2113 }
2114
2115
2116 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
2117 const struct perf_evsel_str_handler *assocs,
2118 size_t nr_assocs)
2119 {
2120 struct perf_evsel *evsel;
2121 size_t i;
2122 int err;
2123
2124 for (i = 0; i < nr_assocs; i++) {
2125 /*
2126 * Adding a handler for an event not in the session,
2127 * just ignore it.
2128 */
2129 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
2130 if (evsel == NULL)
2131 continue;
2132
2133 err = -EEXIST;
2134 if (evsel->handler != NULL)
2135 goto out;
2136 evsel->handler = assocs[i].handler;
2137 }
2138
2139 err = 0;
2140 out:
2141 return err;
2142 }
2143
2144 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused,
2145 union perf_event *event,
2146 struct perf_session *session)
2147 {
2148 struct perf_evlist *evlist = session->evlist;
2149 struct id_index_event *ie = &event->id_index;
2150 size_t i, nr, max_nr;
2151
2152 max_nr = (ie->header.size - sizeof(struct id_index_event)) /
2153 sizeof(struct id_index_entry);
2154 nr = ie->nr;
2155 if (nr > max_nr)
2156 return -EINVAL;
2157
2158 if (dump_trace)
2159 fprintf(stdout, " nr: %zu\n", nr);
2160
2161 for (i = 0; i < nr; i++) {
2162 struct id_index_entry *e = &ie->entries[i];
2163 struct perf_sample_id *sid;
2164
2165 if (dump_trace) {
2166 fprintf(stdout, " ... id: %"PRIu64, e->id);
2167 fprintf(stdout, " idx: %"PRIu64, e->idx);
2168 fprintf(stdout, " cpu: %"PRId64, e->cpu);
2169 fprintf(stdout, " tid: %"PRId64"\n", e->tid);
2170 }
2171
2172 sid = perf_evlist__id2sid(evlist, e->id);
2173 if (!sid)
2174 return -ENOENT;
2175 sid->idx = e->idx;
2176 sid->cpu = e->cpu;
2177 sid->tid = e->tid;
2178 }
2179 return 0;
2180 }
2181
2182 int perf_event__synthesize_id_index(struct perf_tool *tool,
2183 perf_event__handler_t process,
2184 struct perf_evlist *evlist,
2185 struct machine *machine)
2186 {
2187 union perf_event *ev;
2188 struct perf_evsel *evsel;
2189 size_t nr = 0, i = 0, sz, max_nr, n;
2190 int err;
2191
2192 pr_debug2("Synthesizing id index\n");
2193
2194 max_nr = (UINT16_MAX - sizeof(struct id_index_event)) /
2195 sizeof(struct id_index_entry);
2196
2197 evlist__for_each(evlist, evsel)
2198 nr += evsel->ids;
2199
2200 n = nr > max_nr ? max_nr : nr;
2201 sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry);
2202 ev = zalloc(sz);
2203 if (!ev)
2204 return -ENOMEM;
2205
2206 ev->id_index.header.type = PERF_RECORD_ID_INDEX;
2207 ev->id_index.header.size = sz;
2208 ev->id_index.nr = n;
2209
2210 evlist__for_each(evlist, evsel) {
2211 u32 j;
2212
2213 for (j = 0; j < evsel->ids; j++) {
2214 struct id_index_entry *e;
2215 struct perf_sample_id *sid;
2216
2217 if (i >= n) {
2218 err = process(tool, ev, NULL, machine);
2219 if (err)
2220 goto out_err;
2221 nr -= n;
2222 i = 0;
2223 }
2224
2225 e = &ev->id_index.entries[i++];
2226
2227 e->id = evsel->id[j];
2228
2229 sid = perf_evlist__id2sid(evlist, e->id);
2230 if (!sid) {
2231 free(ev);
2232 return -ENOENT;
2233 }
2234
2235 e->idx = sid->idx;
2236 e->cpu = sid->cpu;
2237 e->tid = sid->tid;
2238 }
2239 }
2240
2241 sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry);
2242 ev->id_index.header.size = sz;
2243 ev->id_index.nr = nr;
2244
2245 err = process(tool, ev, NULL, machine);
2246 out_err:
2247 free(ev);
2248
2249 return err;
2250 }
Linux kernel - Deliverables
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