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