?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
pty: Repair TIOCGPTPEER
[cris-mirror.git] / tools / perf / util / session.c
blobd19c40a8104027117a2d30ad2a6aad6af8207025
1 #include <errno.h>
2 #include <inttypes.h>
3 #include <linux/kernel.h>
4 #include <traceevent/event-parse.h>
5 #include <api/fs/fs.h>
6
7 #include <byteswap.h>
8 #include <unistd.h>
9 #include <sys/types.h>
10 #include <sys/mman.h>
11
12 #include "evlist.h"
13 #include "evsel.h"
14 #include "memswap.h"
15 #include "session.h"
16 #include "tool.h"
17 #include "sort.h"
18 #include "util.h"
19 #include "cpumap.h"
20 #include "perf_regs.h"
21 #include "asm/bug.h"
22 #include "auxtrace.h"
23 #include "thread.h"
24 #include "thread-stack.h"
25 #include "stat.h"
26
27 static int perf_session__deliver_event(struct perf_session *session,
28 union perf_event *event,
29 struct perf_sample *sample,
30 struct perf_tool *tool,
31 u64 file_offset);
32
33 static int perf_session__open(struct perf_session *session)
34 {
35 struct perf_data_file *file = session->file;
36
37 if (perf_session__read_header(session) < 0) {
38 pr_err("incompatible file format (rerun with -v to learn more)\n");
39 return -1;
40 }
41
42 if (perf_data_file__is_pipe(file))
43 return 0;
44
45 if (perf_header__has_feat(&session->header, HEADER_STAT))
46 return 0;
47
48 if (!perf_evlist__valid_sample_type(session->evlist)) {
49 pr_err("non matching sample_type\n");
50 return -1;
51 }
52
53 if (!perf_evlist__valid_sample_id_all(session->evlist)) {
54 pr_err("non matching sample_id_all\n");
55 return -1;
56 }
57
58 if (!perf_evlist__valid_read_format(session->evlist)) {
59 pr_err("non matching read_format\n");
60 return -1;
61 }
62
63 return 0;
64 }
65
66 void perf_session__set_id_hdr_size(struct perf_session *session)
67 {
68 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
69
70 machines__set_id_hdr_size(&session->machines, id_hdr_size);
71 }
72
73 int perf_session__create_kernel_maps(struct perf_session *session)
74 {
75 int ret = machine__create_kernel_maps(&session->machines.host);
76
77 if (ret >= 0)
78 ret = machines__create_guest_kernel_maps(&session->machines);
79 return ret;
80 }
81
82 static void perf_session__destroy_kernel_maps(struct perf_session *session)
83 {
84 machines__destroy_kernel_maps(&session->machines);
85 }
86
87 static bool perf_session__has_comm_exec(struct perf_session *session)
88 {
89 struct perf_evsel *evsel;
90
91 evlist__for_each_entry(session->evlist, evsel) {
92 if (evsel->attr.comm_exec)
93 return true;
94 }
95
96 return false;
97 }
98
99 static void perf_session__set_comm_exec(struct perf_session *session)
100 {
101 bool comm_exec = perf_session__has_comm_exec(session);
102
103 machines__set_comm_exec(&session->machines, comm_exec);
104 }
105
106 static int ordered_events__deliver_event(struct ordered_events *oe,
107 struct ordered_event *event)
108 {
109 struct perf_sample sample;
110 struct perf_session *session = container_of(oe, struct perf_session,
111 ordered_events);
112 int ret = perf_evlist__parse_sample(session->evlist, event->event, &sample);
113
114 if (ret) {
115 pr_err("Can't parse sample, err = %d\n", ret);
116 return ret;
117 }
118
119 return perf_session__deliver_event(session, event->event, &sample,
120 session->tool, event->file_offset);
121 }
122
123 struct perf_session *perf_session__new(struct perf_data_file *file,
124 bool repipe, struct perf_tool *tool)
125 {
126 struct perf_session *session = zalloc(sizeof(*session));
127
128 if (!session)
129 goto out;
130
131 session->repipe = repipe;
132 session->tool = tool;
133 INIT_LIST_HEAD(&session->auxtrace_index);
134 machines__init(&session->machines);
135 ordered_events__init(&session->ordered_events, ordered_events__deliver_event);
136
137 if (file) {
138 if (perf_data_file__open(file))
139 goto out_delete;
140
141 session->file = file;
142
143 if (perf_data_file__is_read(file)) {
144 if (perf_session__open(session) < 0)
145 goto out_close;
146
147 /*
148 * set session attributes that are present in perf.data
149 * but not in pipe-mode.
150 */
151 if (!file->is_pipe) {
152 perf_session__set_id_hdr_size(session);
153 perf_session__set_comm_exec(session);
154 }
155 }
156 } else {
157 session->machines.host.env = &perf_env;
158 }
159
160 if (!file || perf_data_file__is_write(file)) {
161 /*
162 * In O_RDONLY mode this will be performed when reading the
163 * kernel MMAP event, in perf_event__process_mmap().
164 */
165 if (perf_session__create_kernel_maps(session) < 0)
166 pr_warning("Cannot read kernel map\n");
167 }
168
169 /*
170 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is
171 * processed, so perf_evlist__sample_id_all is not meaningful here.
172 */
173 if ((!file || !file->is_pipe) && tool && tool->ordering_requires_timestamps &&
174 tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) {
175 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
176 tool->ordered_events = false;
177 }
178
179 return session;
180
181 out_close:
182 perf_data_file__close(file);
183 out_delete:
184 perf_session__delete(session);
185 out:
186 return NULL;
187 }
188
189 static void perf_session__delete_threads(struct perf_session *session)
190 {
191 machine__delete_threads(&session->machines.host);
192 }
193
194 void perf_session__delete(struct perf_session *session)
195 {
196 if (session == NULL)
197 return;
198 auxtrace__free(session);
199 auxtrace_index__free(&session->auxtrace_index);
200 perf_session__destroy_kernel_maps(session);
201 perf_session__delete_threads(session);
202 perf_env__exit(&session->header.env);
203 machines__exit(&session->machines);
204 if (session->file)
205 perf_data_file__close(session->file);
206 free(session);
207 }
208
209 static int process_event_synth_tracing_data_stub(struct perf_tool *tool
210 __maybe_unused,
211 union perf_event *event
212 __maybe_unused,
213 struct perf_session *session
214 __maybe_unused)
215 {
216 dump_printf(": unhandled!\n");
217 return 0;
218 }
219
220 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
221 union perf_event *event __maybe_unused,
222 struct perf_evlist **pevlist
223 __maybe_unused)
224 {
225 dump_printf(": unhandled!\n");
226 return 0;
227 }
228
229 static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused,
230 union perf_event *event __maybe_unused,
231 struct perf_evlist **pevlist
232 __maybe_unused)
233 {
234 if (dump_trace)
235 perf_event__fprintf_event_update(event, stdout);
236
237 dump_printf(": unhandled!\n");
238 return 0;
239 }
240
241 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
242 union perf_event *event __maybe_unused,
243 struct perf_sample *sample __maybe_unused,
244 struct perf_evsel *evsel __maybe_unused,
245 struct machine *machine __maybe_unused)
246 {
247 dump_printf(": unhandled!\n");
248 return 0;
249 }
250
251 static int process_event_stub(struct perf_tool *tool __maybe_unused,
252 union perf_event *event __maybe_unused,
253 struct perf_sample *sample __maybe_unused,
254 struct machine *machine __maybe_unused)
255 {
256 dump_printf(": unhandled!\n");
257 return 0;
258 }
259
260 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
261 union perf_event *event __maybe_unused,
262 struct ordered_events *oe __maybe_unused)
263 {
264 dump_printf(": unhandled!\n");
265 return 0;
266 }
267
268 static int process_finished_round(struct perf_tool *tool,
269 union perf_event *event,
270 struct ordered_events *oe);
271
272 static int skipn(int fd, off_t n)
273 {
274 char buf[4096];
275 ssize_t ret;
276
277 while (n > 0) {
278 ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
279 if (ret <= 0)
280 return ret;
281 n -= ret;
282 }
283
284 return 0;
285 }
286
287 static s64 process_event_auxtrace_stub(struct perf_tool *tool __maybe_unused,
288 union perf_event *event,
289 struct perf_session *session
290 __maybe_unused)
291 {
292 dump_printf(": unhandled!\n");
293 if (perf_data_file__is_pipe(session->file))
294 skipn(perf_data_file__fd(session->file), event->auxtrace.size);
295 return event->auxtrace.size;
296 }
297
298 static int process_event_op2_stub(struct perf_tool *tool __maybe_unused,
299 union perf_event *event __maybe_unused,
300 struct perf_session *session __maybe_unused)
301 {
302 dump_printf(": unhandled!\n");
303 return 0;
304 }
305
306
307 static
308 int process_event_thread_map_stub(struct perf_tool *tool __maybe_unused,
309 union perf_event *event __maybe_unused,
310 struct perf_session *session __maybe_unused)
311 {
312 if (dump_trace)
313 perf_event__fprintf_thread_map(event, stdout);
314
315 dump_printf(": unhandled!\n");
316 return 0;
317 }
318
319 static
320 int process_event_cpu_map_stub(struct perf_tool *tool __maybe_unused,
321 union perf_event *event __maybe_unused,
322 struct perf_session *session __maybe_unused)
323 {
324 if (dump_trace)
325 perf_event__fprintf_cpu_map(event, stdout);
326
327 dump_printf(": unhandled!\n");
328 return 0;
329 }
330
331 static
332 int process_event_stat_config_stub(struct perf_tool *tool __maybe_unused,
333 union perf_event *event __maybe_unused,
334 struct perf_session *session __maybe_unused)
335 {
336 if (dump_trace)
337 perf_event__fprintf_stat_config(event, stdout);
338
339 dump_printf(": unhandled!\n");
340 return 0;
341 }
342
343 static int process_stat_stub(struct perf_tool *tool __maybe_unused,
344 union perf_event *event __maybe_unused,
345 struct perf_session *perf_session
346 __maybe_unused)
347 {
348 if (dump_trace)
349 perf_event__fprintf_stat(event, stdout);
350
351 dump_printf(": unhandled!\n");
352 return 0;
353 }
354
355 static int process_stat_round_stub(struct perf_tool *tool __maybe_unused,
356 union perf_event *event __maybe_unused,
357 struct perf_session *perf_session
358 __maybe_unused)
359 {
360 if (dump_trace)
361 perf_event__fprintf_stat_round(event, stdout);
362
363 dump_printf(": unhandled!\n");
364 return 0;
365 }
366
367 void perf_tool__fill_defaults(struct perf_tool *tool)
368 {
369 if (tool->sample == NULL)
370 tool->sample = process_event_sample_stub;
371 if (tool->mmap == NULL)
372 tool->mmap = process_event_stub;
373 if (tool->mmap2 == NULL)
374 tool->mmap2 = process_event_stub;
375 if (tool->comm == NULL)
376 tool->comm = process_event_stub;
377 if (tool->fork == NULL)
378 tool->fork = process_event_stub;
379 if (tool->exit == NULL)
380 tool->exit = process_event_stub;
381 if (tool->lost == NULL)
382 tool->lost = perf_event__process_lost;
383 if (tool->lost_samples == NULL)
384 tool->lost_samples = perf_event__process_lost_samples;
385 if (tool->aux == NULL)
386 tool->aux = perf_event__process_aux;
387 if (tool->itrace_start == NULL)
388 tool->itrace_start = perf_event__process_itrace_start;
389 if (tool->context_switch == NULL)
390 tool->context_switch = perf_event__process_switch;
391 if (tool->read == NULL)
392 tool->read = process_event_sample_stub;
393 if (tool->throttle == NULL)
394 tool->throttle = process_event_stub;
395 if (tool->unthrottle == NULL)
396 tool->unthrottle = process_event_stub;
397 if (tool->attr == NULL)
398 tool->attr = process_event_synth_attr_stub;
399 if (tool->event_update == NULL)
400 tool->event_update = process_event_synth_event_update_stub;
401 if (tool->tracing_data == NULL)
402 tool->tracing_data = process_event_synth_tracing_data_stub;
403 if (tool->build_id == NULL)
404 tool->build_id = process_event_op2_stub;
405 if (tool->finished_round == NULL) {
406 if (tool->ordered_events)
407 tool->finished_round = process_finished_round;
408 else
409 tool->finished_round = process_finished_round_stub;
410 }
411 if (tool->id_index == NULL)
412 tool->id_index = process_event_op2_stub;
413 if (tool->auxtrace_info == NULL)
414 tool->auxtrace_info = process_event_op2_stub;
415 if (tool->auxtrace == NULL)
416 tool->auxtrace = process_event_auxtrace_stub;
417 if (tool->auxtrace_error == NULL)
418 tool->auxtrace_error = process_event_op2_stub;
419 if (tool->thread_map == NULL)
420 tool->thread_map = process_event_thread_map_stub;
421 if (tool->cpu_map == NULL)
422 tool->cpu_map = process_event_cpu_map_stub;
423 if (tool->stat_config == NULL)
424 tool->stat_config = process_event_stat_config_stub;
425 if (tool->stat == NULL)
426 tool->stat = process_stat_stub;
427 if (tool->stat_round == NULL)
428 tool->stat_round = process_stat_round_stub;
429 if (tool->time_conv == NULL)
430 tool->time_conv = process_event_op2_stub;
431 }
432
433 static void swap_sample_id_all(union perf_event *event, void *data)
434 {
435 void *end = (void *) event + event->header.size;
436 int size = end - data;
437
438 BUG_ON(size % sizeof(u64));
439 mem_bswap_64(data, size);
440 }
441
442 static void perf_event__all64_swap(union perf_event *event,
443 bool sample_id_all __maybe_unused)
444 {
445 struct perf_event_header *hdr = &event->header;
446 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
447 }
448
449 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
450 {
451 event->comm.pid = bswap_32(event->comm.pid);
452 event->comm.tid = bswap_32(event->comm.tid);
453
454 if (sample_id_all) {
455 void *data = &event->comm.comm;
456
457 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
458 swap_sample_id_all(event, data);
459 }
460 }
461
462 static void perf_event__mmap_swap(union perf_event *event,
463 bool sample_id_all)
464 {
465 event->mmap.pid = bswap_32(event->mmap.pid);
466 event->mmap.tid = bswap_32(event->mmap.tid);
467 event->mmap.start = bswap_64(event->mmap.start);
468 event->mmap.len = bswap_64(event->mmap.len);
469 event->mmap.pgoff = bswap_64(event->mmap.pgoff);
470
471 if (sample_id_all) {
472 void *data = &event->mmap.filename;
473
474 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
475 swap_sample_id_all(event, data);
476 }
477 }
478
479 static void perf_event__mmap2_swap(union perf_event *event,
480 bool sample_id_all)
481 {
482 event->mmap2.pid = bswap_32(event->mmap2.pid);
483 event->mmap2.tid = bswap_32(event->mmap2.tid);
484 event->mmap2.start = bswap_64(event->mmap2.start);
485 event->mmap2.len = bswap_64(event->mmap2.len);
486 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
487 event->mmap2.maj = bswap_32(event->mmap2.maj);
488 event->mmap2.min = bswap_32(event->mmap2.min);
489 event->mmap2.ino = bswap_64(event->mmap2.ino);
490
491 if (sample_id_all) {
492 void *data = &event->mmap2.filename;
493
494 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
495 swap_sample_id_all(event, data);
496 }
497 }
498 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
499 {
500 event->fork.pid = bswap_32(event->fork.pid);
501 event->fork.tid = bswap_32(event->fork.tid);
502 event->fork.ppid = bswap_32(event->fork.ppid);
503 event->fork.ptid = bswap_32(event->fork.ptid);
504 event->fork.time = bswap_64(event->fork.time);
505
506 if (sample_id_all)
507 swap_sample_id_all(event, &event->fork + 1);
508 }
509
510 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
511 {
512 event->read.pid = bswap_32(event->read.pid);
513 event->read.tid = bswap_32(event->read.tid);
514 event->read.value = bswap_64(event->read.value);
515 event->read.time_enabled = bswap_64(event->read.time_enabled);
516 event->read.time_running = bswap_64(event->read.time_running);
517 event->read.id = bswap_64(event->read.id);
518
519 if (sample_id_all)
520 swap_sample_id_all(event, &event->read + 1);
521 }
522
523 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
524 {
525 event->aux.aux_offset = bswap_64(event->aux.aux_offset);
526 event->aux.aux_size = bswap_64(event->aux.aux_size);
527 event->aux.flags = bswap_64(event->aux.flags);
528
529 if (sample_id_all)
530 swap_sample_id_all(event, &event->aux + 1);
531 }
532
533 static void perf_event__itrace_start_swap(union perf_event *event,
534 bool sample_id_all)
535 {
536 event->itrace_start.pid = bswap_32(event->itrace_start.pid);
537 event->itrace_start.tid = bswap_32(event->itrace_start.tid);
538
539 if (sample_id_all)
540 swap_sample_id_all(event, &event->itrace_start + 1);
541 }
542
543 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
544 {
545 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
546 event->context_switch.next_prev_pid =
547 bswap_32(event->context_switch.next_prev_pid);
548 event->context_switch.next_prev_tid =
549 bswap_32(event->context_switch.next_prev_tid);
550 }
551
552 if (sample_id_all)
553 swap_sample_id_all(event, &event->context_switch + 1);
554 }
555
556 static void perf_event__throttle_swap(union perf_event *event,
557 bool sample_id_all)
558 {
559 event->throttle.time = bswap_64(event->throttle.time);
560 event->throttle.id = bswap_64(event->throttle.id);
561 event->throttle.stream_id = bswap_64(event->throttle.stream_id);
562
563 if (sample_id_all)
564 swap_sample_id_all(event, &event->throttle + 1);
565 }
566
567 static u8 revbyte(u8 b)
568 {
569 int rev = (b >> 4) | ((b & 0xf) << 4);
570 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
571 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
572 return (u8) rev;
573 }
574
575 /*
576 * XXX this is hack in attempt to carry flags bitfield
577 * through endian village. ABI says:
578 *
579 * Bit-fields are allocated from right to left (least to most significant)
580 * on little-endian implementations and from left to right (most to least
581 * significant) on big-endian implementations.
582 *
583 * The above seems to be byte specific, so we need to reverse each
584 * byte of the bitfield. 'Internet' also says this might be implementation
585 * specific and we probably need proper fix and carry perf_event_attr
586 * bitfield flags in separate data file FEAT_ section. Thought this seems
587 * to work for now.
588 */
589 static void swap_bitfield(u8 *p, unsigned len)
590 {
591 unsigned i;
592
593 for (i = 0; i < len; i++) {
594 *p = revbyte(*p);
595 p++;
596 }
597 }
598
599 /* exported for swapping attributes in file header */
600 void perf_event__attr_swap(struct perf_event_attr *attr)
601 {
602 attr->type = bswap_32(attr->type);
603 attr->size = bswap_32(attr->size);
604
605 #define bswap_safe(f, n) \
606 (attr->size > (offsetof(struct perf_event_attr, f) + \
607 sizeof(attr->f) * (n)))
608 #define bswap_field(f, sz) \
609 do { \
610 if (bswap_safe(f, 0)) \
611 attr->f = bswap_##sz(attr->f); \
612 } while(0)
613 #define bswap_field_16(f) bswap_field(f, 16)
614 #define bswap_field_32(f) bswap_field(f, 32)
615 #define bswap_field_64(f) bswap_field(f, 64)
616
617 bswap_field_64(config);
618 bswap_field_64(sample_period);
619 bswap_field_64(sample_type);
620 bswap_field_64(read_format);
621 bswap_field_32(wakeup_events);
622 bswap_field_32(bp_type);
623 bswap_field_64(bp_addr);
624 bswap_field_64(bp_len);
625 bswap_field_64(branch_sample_type);
626 bswap_field_64(sample_regs_user);
627 bswap_field_32(sample_stack_user);
628 bswap_field_32(aux_watermark);
629 bswap_field_16(sample_max_stack);
630
631 /*
632 * After read_format are bitfields. Check read_format because
633 * we are unable to use offsetof on bitfield.
634 */
635 if (bswap_safe(read_format, 1))
636 swap_bitfield((u8 *) (&attr->read_format + 1),
637 sizeof(u64));
638 #undef bswap_field_64
639 #undef bswap_field_32
640 #undef bswap_field
641 #undef bswap_safe
642 }
643
644 static void perf_event__hdr_attr_swap(union perf_event *event,
645 bool sample_id_all __maybe_unused)
646 {
647 size_t size;
648
649 perf_event__attr_swap(&event->attr.attr);
650
651 size = event->header.size;
652 size -= (void *)&event->attr.id - (void *)event;
653 mem_bswap_64(event->attr.id, size);
654 }
655
656 static void perf_event__event_update_swap(union perf_event *event,
657 bool sample_id_all __maybe_unused)
658 {
659 event->event_update.type = bswap_64(event->event_update.type);
660 event->event_update.id = bswap_64(event->event_update.id);
661 }
662
663 static void perf_event__event_type_swap(union perf_event *event,
664 bool sample_id_all __maybe_unused)
665 {
666 event->event_type.event_type.event_id =
667 bswap_64(event->event_type.event_type.event_id);
668 }
669
670 static void perf_event__tracing_data_swap(union perf_event *event,
671 bool sample_id_all __maybe_unused)
672 {
673 event->tracing_data.size = bswap_32(event->tracing_data.size);
674 }
675
676 static void perf_event__auxtrace_info_swap(union perf_event *event,
677 bool sample_id_all __maybe_unused)
678 {
679 size_t size;
680
681 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
682
683 size = event->header.size;
684 size -= (void *)&event->auxtrace_info.priv - (void *)event;
685 mem_bswap_64(event->auxtrace_info.priv, size);
686 }
687
688 static void perf_event__auxtrace_swap(union perf_event *event,
689 bool sample_id_all __maybe_unused)
690 {
691 event->auxtrace.size = bswap_64(event->auxtrace.size);
692 event->auxtrace.offset = bswap_64(event->auxtrace.offset);
693 event->auxtrace.reference = bswap_64(event->auxtrace.reference);
694 event->auxtrace.idx = bswap_32(event->auxtrace.idx);
695 event->auxtrace.tid = bswap_32(event->auxtrace.tid);
696 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu);
697 }
698
699 static void perf_event__auxtrace_error_swap(union perf_event *event,
700 bool sample_id_all __maybe_unused)
701 {
702 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
703 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
704 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu);
705 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid);
706 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid);
707 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip);
708 }
709
710 static void perf_event__thread_map_swap(union perf_event *event,
711 bool sample_id_all __maybe_unused)
712 {
713 unsigned i;
714
715 event->thread_map.nr = bswap_64(event->thread_map.nr);
716
717 for (i = 0; i < event->thread_map.nr; i++)
718 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
719 }
720
721 static void perf_event__cpu_map_swap(union perf_event *event,
722 bool sample_id_all __maybe_unused)
723 {
724 struct cpu_map_data *data = &event->cpu_map.data;
725 struct cpu_map_entries *cpus;
726 struct cpu_map_mask *mask;
727 unsigned i;
728
729 data->type = bswap_64(data->type);
730
731 switch (data->type) {
732 case PERF_CPU_MAP__CPUS:
733 cpus = (struct cpu_map_entries *)data->data;
734
735 cpus->nr = bswap_16(cpus->nr);
736
737 for (i = 0; i < cpus->nr; i++)
738 cpus->cpu[i] = bswap_16(cpus->cpu[i]);
739 break;
740 case PERF_CPU_MAP__MASK:
741 mask = (struct cpu_map_mask *) data->data;
742
743 mask->nr = bswap_16(mask->nr);
744 mask->long_size = bswap_16(mask->long_size);
745
746 switch (mask->long_size) {
747 case 4: mem_bswap_32(&mask->mask, mask->nr); break;
748 case 8: mem_bswap_64(&mask->mask, mask->nr); break;
749 default:
750 pr_err("cpu_map swap: unsupported long size\n");
751 }
752 default:
753 break;
754 }
755 }
756
757 static void perf_event__stat_config_swap(union perf_event *event,
758 bool sample_id_all __maybe_unused)
759 {
760 u64 size;
761
762 size = event->stat_config.nr * sizeof(event->stat_config.data[0]);
763 size += 1; /* nr item itself */
764 mem_bswap_64(&event->stat_config.nr, size);
765 }
766
767 static void perf_event__stat_swap(union perf_event *event,
768 bool sample_id_all __maybe_unused)
769 {
770 event->stat.id = bswap_64(event->stat.id);
771 event->stat.thread = bswap_32(event->stat.thread);
772 event->stat.cpu = bswap_32(event->stat.cpu);
773 event->stat.val = bswap_64(event->stat.val);
774 event->stat.ena = bswap_64(event->stat.ena);
775 event->stat.run = bswap_64(event->stat.run);
776 }
777
778 static void perf_event__stat_round_swap(union perf_event *event,
779 bool sample_id_all __maybe_unused)
780 {
781 event->stat_round.type = bswap_64(event->stat_round.type);
782 event->stat_round.time = bswap_64(event->stat_round.time);
783 }
784
785 typedef void (*perf_event__swap_op)(union perf_event *event,
786 bool sample_id_all);
787
788 static perf_event__swap_op perf_event__swap_ops[] = {
789 [PERF_RECORD_MMAP] = perf_event__mmap_swap,
790 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap,
791 [PERF_RECORD_COMM] = perf_event__comm_swap,
792 [PERF_RECORD_FORK] = perf_event__task_swap,
793 [PERF_RECORD_EXIT] = perf_event__task_swap,
794 [PERF_RECORD_LOST] = perf_event__all64_swap,
795 [PERF_RECORD_READ] = perf_event__read_swap,
796 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap,
797 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap,
798 [PERF_RECORD_SAMPLE] = perf_event__all64_swap,
799 [PERF_RECORD_AUX] = perf_event__aux_swap,
800 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap,
801 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap,
802 [PERF_RECORD_SWITCH] = perf_event__switch_swap,
803 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap,
804 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
805 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
806 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
807 [PERF_RECORD_HEADER_BUILD_ID] = NULL,
808 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap,
809 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap,
810 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap,
811 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap,
812 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap,
813 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap,
814 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap,
815 [PERF_RECORD_STAT] = perf_event__stat_swap,
816 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap,
817 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap,
818 [PERF_RECORD_TIME_CONV] = perf_event__all64_swap,
819 [PERF_RECORD_HEADER_MAX] = NULL,
820 };
821
822 /*
823 * When perf record finishes a pass on every buffers, it records this pseudo
824 * event.
825 * We record the max timestamp t found in the pass n.
826 * Assuming these timestamps are monotonic across cpus, we know that if
827 * a buffer still has events with timestamps below t, they will be all
828 * available and then read in the pass n + 1.
829 * Hence when we start to read the pass n + 2, we can safely flush every
830 * events with timestamps below t.
831 *
832 * ============ PASS n =================
833 * CPU 0 | CPU 1
834 * |
835 * cnt1 timestamps | cnt2 timestamps
836 * 1 | 2
837 * 2 | 3
838 * - | 4 <--- max recorded
839 *
840 * ============ PASS n + 1 ==============
841 * CPU 0 | CPU 1
842 * |
843 * cnt1 timestamps | cnt2 timestamps
844 * 3 | 5
845 * 4 | 6
846 * 5 | 7 <---- max recorded
847 *
848 * Flush every events below timestamp 4
849 *
850 * ============ PASS n + 2 ==============
851 * CPU 0 | CPU 1
852 * |
853 * cnt1 timestamps | cnt2 timestamps
854 * 6 | 8
855 * 7 | 9
856 * - | 10
857 *
858 * Flush every events below timestamp 7
859 * etc...
860 */
861 static int process_finished_round(struct perf_tool *tool __maybe_unused,
862 union perf_event *event __maybe_unused,
863 struct ordered_events *oe)
864 {
865 if (dump_trace)
866 fprintf(stdout, "\n");
867 return ordered_events__flush(oe, OE_FLUSH__ROUND);
868 }
869
870 int perf_session__queue_event(struct perf_session *s, union perf_event *event,
871 struct perf_sample *sample, u64 file_offset)
872 {
873 return ordered_events__queue(&s->ordered_events, event, sample, file_offset);
874 }
875
876 static void callchain__lbr_callstack_printf(struct perf_sample *sample)
877 {
878 struct ip_callchain *callchain = sample->callchain;
879 struct branch_stack *lbr_stack = sample->branch_stack;
880 u64 kernel_callchain_nr = callchain->nr;
881 unsigned int i;
882
883 for (i = 0; i < kernel_callchain_nr; i++) {
884 if (callchain->ips[i] == PERF_CONTEXT_USER)
885 break;
886 }
887
888 if ((i != kernel_callchain_nr) && lbr_stack->nr) {
889 u64 total_nr;
890 /*
891 * LBR callstack can only get user call chain,
892 * i is kernel call chain number,
893 * 1 is PERF_CONTEXT_USER.
894 *
895 * The user call chain is stored in LBR registers.
896 * LBR are pair registers. The caller is stored
897 * in "from" register, while the callee is stored
898 * in "to" register.
899 * For example, there is a call stack
900 * "A"->"B"->"C"->"D".
901 * The LBR registers will recorde like
902 * "C"->"D", "B"->"C", "A"->"B".
903 * So only the first "to" register and all "from"
904 * registers are needed to construct the whole stack.
905 */
906 total_nr = i + 1 + lbr_stack->nr + 1;
907 kernel_callchain_nr = i + 1;
908
909 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
910
911 for (i = 0; i < kernel_callchain_nr; i++)
912 printf("..... %2d: %016" PRIx64 "\n",
913 i, callchain->ips[i]);
914
915 printf("..... %2d: %016" PRIx64 "\n",
916 (int)(kernel_callchain_nr), lbr_stack->entries[0].to);
917 for (i = 0; i < lbr_stack->nr; i++)
918 printf("..... %2d: %016" PRIx64 "\n",
919 (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from);
920 }
921 }
922
923 static void callchain__printf(struct perf_evsel *evsel,
924 struct perf_sample *sample)
925 {
926 unsigned int i;
927 struct ip_callchain *callchain = sample->callchain;
928
929 if (perf_evsel__has_branch_callstack(evsel))
930 callchain__lbr_callstack_printf(sample);
931
932 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
933
934 for (i = 0; i < callchain->nr; i++)
935 printf("..... %2d: %016" PRIx64 "\n",
936 i, callchain->ips[i]);
937 }
938
939 static void branch_stack__printf(struct perf_sample *sample)
940 {
941 uint64_t i;
942
943 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
944
945 for (i = 0; i < sample->branch_stack->nr; i++) {
946 struct branch_entry *e = &sample->branch_stack->entries[i];
947
948 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n",
949 i, e->from, e->to,
950 (unsigned short)e->flags.cycles,
951 e->flags.mispred ? "M" : " ",
952 e->flags.predicted ? "P" : " ",
953 e->flags.abort ? "A" : " ",
954 e->flags.in_tx ? "T" : " ",
955 (unsigned)e->flags.reserved);
956 }
957 }
958
959 static void regs_dump__printf(u64 mask, u64 *regs)
960 {
961 unsigned rid, i = 0;
962
963 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
964 u64 val = regs[i++];
965
966 printf(".... %-5s 0x%" PRIx64 "\n",
967 perf_reg_name(rid), val);
968 }
969 }
970
971 static const char *regs_abi[] = {
972 [PERF_SAMPLE_REGS_ABI_NONE] = "none",
973 [PERF_SAMPLE_REGS_ABI_32] = "32-bit",
974 [PERF_SAMPLE_REGS_ABI_64] = "64-bit",
975 };
976
977 static inline const char *regs_dump_abi(struct regs_dump *d)
978 {
979 if (d->abi > PERF_SAMPLE_REGS_ABI_64)
980 return "unknown";
981
982 return regs_abi[d->abi];
983 }
984
985 static void regs__printf(const char *type, struct regs_dump *regs)
986 {
987 u64 mask = regs->mask;
988
989 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
990 type,
991 mask,
992 regs_dump_abi(regs));
993
994 regs_dump__printf(mask, regs->regs);
995 }
996
997 static void regs_user__printf(struct perf_sample *sample)
998 {
999 struct regs_dump *user_regs = &sample->user_regs;
1000
1001 if (user_regs->regs)
1002 regs__printf("user", user_regs);
1003 }
1004
1005 static void regs_intr__printf(struct perf_sample *sample)
1006 {
1007 struct regs_dump *intr_regs = &sample->intr_regs;
1008
1009 if (intr_regs->regs)
1010 regs__printf("intr", intr_regs);
1011 }
1012
1013 static void stack_user__printf(struct stack_dump *dump)
1014 {
1015 printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
1016 dump->size, dump->offset);
1017 }
1018
1019 static void perf_evlist__print_tstamp(struct perf_evlist *evlist,
1020 union perf_event *event,
1021 struct perf_sample *sample)
1022 {
1023 u64 sample_type = __perf_evlist__combined_sample_type(evlist);
1024
1025 if (event->header.type != PERF_RECORD_SAMPLE &&
1026 !perf_evlist__sample_id_all(evlist)) {
1027 fputs("-1 -1 ", stdout);
1028 return;
1029 }
1030
1031 if ((sample_type & PERF_SAMPLE_CPU))
1032 printf("%u ", sample->cpu);
1033
1034 if (sample_type & PERF_SAMPLE_TIME)
1035 printf("%" PRIu64 " ", sample->time);
1036 }
1037
1038 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
1039 {
1040 printf("... sample_read:\n");
1041
1042 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1043 printf("...... time enabled %016" PRIx64 "\n",
1044 sample->read.time_enabled);
1045
1046 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1047 printf("...... time running %016" PRIx64 "\n",
1048 sample->read.time_running);
1049
1050 if (read_format & PERF_FORMAT_GROUP) {
1051 u64 i;
1052
1053 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
1054
1055 for (i = 0; i < sample->read.group.nr; i++) {
1056 struct sample_read_value *value;
1057
1058 value = &sample->read.group.values[i];
1059 printf("..... id %016" PRIx64
1060 ", value %016" PRIx64 "\n",
1061 value->id, value->value);
1062 }
1063 } else
1064 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
1065 sample->read.one.id, sample->read.one.value);
1066 }
1067
1068 static void dump_event(struct perf_evlist *evlist, union perf_event *event,
1069 u64 file_offset, struct perf_sample *sample)
1070 {
1071 if (!dump_trace)
1072 return;
1073
1074 printf("\n%#" PRIx64 " [%#x]: event: %d\n",
1075 file_offset, event->header.size, event->header.type);
1076
1077 trace_event(event);
1078
1079 if (sample)
1080 perf_evlist__print_tstamp(evlist, event, sample);
1081
1082 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
1083 event->header.size, perf_event__name(event->header.type));
1084 }
1085
1086 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
1087 struct perf_sample *sample)
1088 {
1089 u64 sample_type;
1090
1091 if (!dump_trace)
1092 return;
1093
1094 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
1095 event->header.misc, sample->pid, sample->tid, sample->ip,
1096 sample->period, sample->addr);
1097
1098 sample_type = evsel->attr.sample_type;
1099
1100 if (sample_type & PERF_SAMPLE_CALLCHAIN)
1101 callchain__printf(evsel, sample);
1102
1103 if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !perf_evsel__has_branch_callstack(evsel))
1104 branch_stack__printf(sample);
1105
1106 if (sample_type & PERF_SAMPLE_REGS_USER)
1107 regs_user__printf(sample);
1108
1109 if (sample_type & PERF_SAMPLE_REGS_INTR)
1110 regs_intr__printf(sample);
1111
1112 if (sample_type & PERF_SAMPLE_STACK_USER)
1113 stack_user__printf(&sample->user_stack);
1114
1115 if (sample_type & PERF_SAMPLE_WEIGHT)
1116 printf("... weight: %" PRIu64 "\n", sample->weight);
1117
1118 if (sample_type & PERF_SAMPLE_DATA_SRC)
1119 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
1120
1121 if (sample_type & PERF_SAMPLE_TRANSACTION)
1122 printf("... transaction: %" PRIx64 "\n", sample->transaction);
1123
1124 if (sample_type & PERF_SAMPLE_READ)
1125 sample_read__printf(sample, evsel->attr.read_format);
1126 }
1127
1128 static struct machine *machines__find_for_cpumode(struct machines *machines,
1129 union perf_event *event,
1130 struct perf_sample *sample)
1131 {
1132 struct machine *machine;
1133
1134 if (perf_guest &&
1135 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1136 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1137 u32 pid;
1138
1139 if (event->header.type == PERF_RECORD_MMAP
1140 || event->header.type == PERF_RECORD_MMAP2)
1141 pid = event->mmap.pid;
1142 else
1143 pid = sample->pid;
1144
1145 machine = machines__find(machines, pid);
1146 if (!machine)
1147 machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID);
1148 return machine;
1149 }
1150
1151 return &machines->host;
1152 }
1153
1154 static int deliver_sample_value(struct perf_evlist *evlist,
1155 struct perf_tool *tool,
1156 union perf_event *event,
1157 struct perf_sample *sample,
1158 struct sample_read_value *v,
1159 struct machine *machine)
1160 {
1161 struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
1162
1163 if (sid) {
1164 sample->id = v->id;
1165 sample->period = v->value - sid->period;
1166 sid->period = v->value;
1167 }
1168
1169 if (!sid || sid->evsel == NULL) {
1170 ++evlist->stats.nr_unknown_id;
1171 return 0;
1172 }
1173
1174 return tool->sample(tool, event, sample, sid->evsel, machine);
1175 }
1176
1177 static int deliver_sample_group(struct perf_evlist *evlist,
1178 struct perf_tool *tool,
1179 union perf_event *event,
1180 struct perf_sample *sample,
1181 struct machine *machine)
1182 {
1183 int ret = -EINVAL;
1184 u64 i;
1185
1186 for (i = 0; i < sample->read.group.nr; i++) {
1187 ret = deliver_sample_value(evlist, tool, event, sample,
1188 &sample->read.group.values[i],
1189 machine);
1190 if (ret)
1191 break;
1192 }
1193
1194 return ret;
1195 }
1196
1197 static int
1198 perf_evlist__deliver_sample(struct perf_evlist *evlist,
1199 struct perf_tool *tool,
1200 union perf_event *event,
1201 struct perf_sample *sample,
1202 struct perf_evsel *evsel,
1203 struct machine *machine)
1204 {
1205 /* We know evsel != NULL. */
1206 u64 sample_type = evsel->attr.sample_type;
1207 u64 read_format = evsel->attr.read_format;
1208
1209 /* Standard sample delivery. */
1210 if (!(sample_type & PERF_SAMPLE_READ))
1211 return tool->sample(tool, event, sample, evsel, machine);
1212
1213 /* For PERF_SAMPLE_READ we have either single or group mode. */
1214 if (read_format & PERF_FORMAT_GROUP)
1215 return deliver_sample_group(evlist, tool, event, sample,
1216 machine);
1217 else
1218 return deliver_sample_value(evlist, tool, event, sample,
1219 &sample->read.one, machine);
1220 }
1221
1222 static int machines__deliver_event(struct machines *machines,
1223 struct perf_evlist *evlist,
1224 union perf_event *event,
1225 struct perf_sample *sample,
1226 struct perf_tool *tool, u64 file_offset)
1227 {
1228 struct perf_evsel *evsel;
1229 struct machine *machine;
1230
1231 dump_event(evlist, event, file_offset, sample);
1232
1233 evsel = perf_evlist__id2evsel(evlist, sample->id);
1234
1235 machine = machines__find_for_cpumode(machines, event, sample);
1236
1237 switch (event->header.type) {
1238 case PERF_RECORD_SAMPLE:
1239 if (evsel == NULL) {
1240 ++evlist->stats.nr_unknown_id;
1241 return 0;
1242 }
1243 dump_sample(evsel, event, sample);
1244 if (machine == NULL) {
1245 ++evlist->stats.nr_unprocessable_samples;
1246 return 0;
1247 }
1248 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1249 case PERF_RECORD_MMAP:
1250 return tool->mmap(tool, event, sample, machine);
1251 case PERF_RECORD_MMAP2:
1252 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1253 ++evlist->stats.nr_proc_map_timeout;
1254 return tool->mmap2(tool, event, sample, machine);
1255 case PERF_RECORD_COMM:
1256 return tool->comm(tool, event, sample, machine);
1257 case PERF_RECORD_NAMESPACES:
1258 return tool->namespaces(tool, event, sample, machine);
1259 case PERF_RECORD_FORK:
1260 return tool->fork(tool, event, sample, machine);
1261 case PERF_RECORD_EXIT:
1262 return tool->exit(tool, event, sample, machine);
1263 case PERF_RECORD_LOST:
1264 if (tool->lost == perf_event__process_lost)
1265 evlist->stats.total_lost += event->lost.lost;
1266 return tool->lost(tool, event, sample, machine);
1267 case PERF_RECORD_LOST_SAMPLES:
1268 if (tool->lost_samples == perf_event__process_lost_samples)
1269 evlist->stats.total_lost_samples += event->lost_samples.lost;
1270 return tool->lost_samples(tool, event, sample, machine);
1271 case PERF_RECORD_READ:
1272 return tool->read(tool, event, sample, evsel, machine);
1273 case PERF_RECORD_THROTTLE:
1274 return tool->throttle(tool, event, sample, machine);
1275 case PERF_RECORD_UNTHROTTLE:
1276 return tool->unthrottle(tool, event, sample, machine);
1277 case PERF_RECORD_AUX:
1278 if (tool->aux == perf_event__process_aux) {
1279 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED)
1280 evlist->stats.total_aux_lost += 1;
1281 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL)
1282 evlist->stats.total_aux_partial += 1;
1283 }
1284 return tool->aux(tool, event, sample, machine);
1285 case PERF_RECORD_ITRACE_START:
1286 return tool->itrace_start(tool, event, sample, machine);
1287 case PERF_RECORD_SWITCH:
1288 case PERF_RECORD_SWITCH_CPU_WIDE:
1289 return tool->context_switch(tool, event, sample, machine);
1290 default:
1291 ++evlist->stats.nr_unknown_events;
1292 return -1;
1293 }
1294 }
1295
1296 static int perf_session__deliver_event(struct perf_session *session,
1297 union perf_event *event,
1298 struct perf_sample *sample,
1299 struct perf_tool *tool,
1300 u64 file_offset)
1301 {
1302 int ret;
1303
1304 ret = auxtrace__process_event(session, event, sample, tool);
1305 if (ret < 0)
1306 return ret;
1307 if (ret > 0)
1308 return 0;
1309
1310 return machines__deliver_event(&session->machines, session->evlist,
1311 event, sample, tool, file_offset);
1312 }
1313
1314 static s64 perf_session__process_user_event(struct perf_session *session,
1315 union perf_event *event,
1316 u64 file_offset)
1317 {
1318 struct ordered_events *oe = &session->ordered_events;
1319 struct perf_tool *tool = session->tool;
1320 int fd = perf_data_file__fd(session->file);
1321 int err;
1322
1323 dump_event(session->evlist, event, file_offset, NULL);
1324
1325 /* These events are processed right away */
1326 switch (event->header.type) {
1327 case PERF_RECORD_HEADER_ATTR:
1328 err = tool->attr(tool, event, &session->evlist);
1329 if (err == 0) {
1330 perf_session__set_id_hdr_size(session);
1331 perf_session__set_comm_exec(session);
1332 }
1333 return err;
1334 case PERF_RECORD_EVENT_UPDATE:
1335 return tool->event_update(tool, event, &session->evlist);
1336 case PERF_RECORD_HEADER_EVENT_TYPE:
1337 /*
1338 * Depreceated, but we need to handle it for sake
1339 * of old data files create in pipe mode.
1340 */
1341 return 0;
1342 case PERF_RECORD_HEADER_TRACING_DATA:
1343 /* setup for reading amidst mmap */
1344 lseek(fd, file_offset, SEEK_SET);
1345 return tool->tracing_data(tool, event, session);
1346 case PERF_RECORD_HEADER_BUILD_ID:
1347 return tool->build_id(tool, event, session);
1348 case PERF_RECORD_FINISHED_ROUND:
1349 return tool->finished_round(tool, event, oe);
1350 case PERF_RECORD_ID_INDEX:
1351 return tool->id_index(tool, event, session);
1352 case PERF_RECORD_AUXTRACE_INFO:
1353 return tool->auxtrace_info(tool, event, session);
1354 case PERF_RECORD_AUXTRACE:
1355 /* setup for reading amidst mmap */
1356 lseek(fd, file_offset + event->header.size, SEEK_SET);
1357 return tool->auxtrace(tool, event, session);
1358 case PERF_RECORD_AUXTRACE_ERROR:
1359 perf_session__auxtrace_error_inc(session, event);
1360 return tool->auxtrace_error(tool, event, session);
1361 case PERF_RECORD_THREAD_MAP:
1362 return tool->thread_map(tool, event, session);
1363 case PERF_RECORD_CPU_MAP:
1364 return tool->cpu_map(tool, event, session);
1365 case PERF_RECORD_STAT_CONFIG:
1366 return tool->stat_config(tool, event, session);
1367 case PERF_RECORD_STAT:
1368 return tool->stat(tool, event, session);
1369 case PERF_RECORD_STAT_ROUND:
1370 return tool->stat_round(tool, event, session);
1371 case PERF_RECORD_TIME_CONV:
1372 session->time_conv = event->time_conv;
1373 return tool->time_conv(tool, event, session);
1374 default:
1375 return -EINVAL;
1376 }
1377 }
1378
1379 int perf_session__deliver_synth_event(struct perf_session *session,
1380 union perf_event *event,
1381 struct perf_sample *sample)
1382 {
1383 struct perf_evlist *evlist = session->evlist;
1384 struct perf_tool *tool = session->tool;
1385
1386 events_stats__inc(&evlist->stats, event->header.type);
1387
1388 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1389 return perf_session__process_user_event(session, event, 0);
1390
1391 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0);
1392 }
1393
1394 static void event_swap(union perf_event *event, bool sample_id_all)
1395 {
1396 perf_event__swap_op swap;
1397
1398 swap = perf_event__swap_ops[event->header.type];
1399 if (swap)
1400 swap(event, sample_id_all);
1401 }
1402
1403 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1404 void *buf, size_t buf_sz,
1405 union perf_event **event_ptr,
1406 struct perf_sample *sample)
1407 {
1408 union perf_event *event;
1409 size_t hdr_sz, rest;
1410 int fd;
1411
1412 if (session->one_mmap && !session->header.needs_swap) {
1413 event = file_offset - session->one_mmap_offset +
1414 session->one_mmap_addr;
1415 goto out_parse_sample;
1416 }
1417
1418 if (perf_data_file__is_pipe(session->file))
1419 return -1;
1420
1421 fd = perf_data_file__fd(session->file);
1422 hdr_sz = sizeof(struct perf_event_header);
1423
1424 if (buf_sz < hdr_sz)
1425 return -1;
1426
1427 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1428 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1429 return -1;
1430
1431 event = (union perf_event *)buf;
1432
1433 if (session->header.needs_swap)
1434 perf_event_header__bswap(&event->header);
1435
1436 if (event->header.size < hdr_sz || event->header.size > buf_sz)
1437 return -1;
1438
1439 rest = event->header.size - hdr_sz;
1440
1441 if (readn(fd, buf, rest) != (ssize_t)rest)
1442 return -1;
1443
1444 if (session->header.needs_swap)
1445 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1446
1447 out_parse_sample:
1448
1449 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1450 perf_evlist__parse_sample(session->evlist, event, sample))
1451 return -1;
1452
1453 *event_ptr = event;
1454
1455 return 0;
1456 }
1457
1458 static s64 perf_session__process_event(struct perf_session *session,
1459 union perf_event *event, u64 file_offset)
1460 {
1461 struct perf_evlist *evlist = session->evlist;
1462 struct perf_tool *tool = session->tool;
1463 struct perf_sample sample;
1464 int ret;
1465
1466 if (session->header.needs_swap)
1467 event_swap(event, perf_evlist__sample_id_all(evlist));
1468
1469 if (event->header.type >= PERF_RECORD_HEADER_MAX)
1470 return -EINVAL;
1471
1472 events_stats__inc(&evlist->stats, event->header.type);
1473
1474 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1475 return perf_session__process_user_event(session, event, file_offset);
1476
1477 /*
1478 * For all kernel events we get the sample data
1479 */
1480 ret = perf_evlist__parse_sample(evlist, event, &sample);
1481 if (ret)
1482 return ret;
1483
1484 if (tool->ordered_events) {
1485 ret = perf_session__queue_event(session, event, &sample, file_offset);
1486 if (ret != -ETIME)
1487 return ret;
1488 }
1489
1490 return perf_session__deliver_event(session, event, &sample, tool,
1491 file_offset);
1492 }
1493
1494 void perf_event_header__bswap(struct perf_event_header *hdr)
1495 {
1496 hdr->type = bswap_32(hdr->type);
1497 hdr->misc = bswap_16(hdr->misc);
1498 hdr->size = bswap_16(hdr->size);
1499 }
1500
1501 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1502 {
1503 return machine__findnew_thread(&session->machines.host, -1, pid);
1504 }
1505
1506 int perf_session__register_idle_thread(struct perf_session *session)
1507 {
1508 struct thread *thread;
1509 int err = 0;
1510
1511 thread = machine__findnew_thread(&session->machines.host, 0, 0);
1512 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1513 pr_err("problem inserting idle task.\n");
1514 err = -1;
1515 }
1516
1517 if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) {
1518 pr_err("problem inserting idle task.\n");
1519 err = -1;
1520 }
1521
1522 /* machine__findnew_thread() got the thread, so put it */
1523 thread__put(thread);
1524 return err;
1525 }
1526
1527 static void
1528 perf_session__warn_order(const struct perf_session *session)
1529 {
1530 const struct ordered_events *oe = &session->ordered_events;
1531 struct perf_evsel *evsel;
1532 bool should_warn = true;
1533
1534 evlist__for_each_entry(session->evlist, evsel) {
1535 if (evsel->attr.write_backward)
1536 should_warn = false;
1537 }
1538
1539 if (!should_warn)
1540 return;
1541 if (oe->nr_unordered_events != 0)
1542 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1543 }
1544
1545 static void perf_session__warn_about_errors(const struct perf_session *session)
1546 {
1547 const struct events_stats *stats = &session->evlist->stats;
1548
1549 if (session->tool->lost == perf_event__process_lost &&
1550 stats->nr_events[PERF_RECORD_LOST] != 0) {
1551 ui__warning("Processed %d events and lost %d chunks!\n\n"
1552 "Check IO/CPU overload!\n\n",
1553 stats->nr_events[0],
1554 stats->nr_events[PERF_RECORD_LOST]);
1555 }
1556
1557 if (session->tool->lost_samples == perf_event__process_lost_samples) {
1558 double drop_rate;
1559
1560 drop_rate = (double)stats->total_lost_samples /
1561 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1562 if (drop_rate > 0.05) {
1563 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%% samples!\n\n",
1564 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1565 drop_rate * 100.0);
1566 }
1567 }
1568
1569 if (session->tool->aux == perf_event__process_aux &&
1570 stats->total_aux_lost != 0) {
1571 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1572 stats->total_aux_lost,
1573 stats->nr_events[PERF_RECORD_AUX]);
1574 }
1575
1576 if (session->tool->aux == perf_event__process_aux &&
1577 stats->total_aux_partial != 0) {
1578 bool vmm_exclusive = false;
1579
1580 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive",
1581 &vmm_exclusive);
1582
1583 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n"
1584 "Are you running a KVM guest in the background?%s\n\n",
1585 stats->total_aux_partial,
1586 stats->nr_events[PERF_RECORD_AUX],
1587 vmm_exclusive ?
1588 "\nReloading kvm_intel module with vmm_exclusive=0\n"
1589 "will reduce the gaps to only guest's timeslices." :
1590 "");
1591 }
1592
1593 if (stats->nr_unknown_events != 0) {
1594 ui__warning("Found %u unknown events!\n\n"
1595 "Is this an older tool processing a perf.data "
1596 "file generated by a more recent tool?\n\n"
1597 "If that is not the case, consider "
1598 "reporting to linux-kernel@vger.kernel.org.\n\n",
1599 stats->nr_unknown_events);
1600 }
1601
1602 if (stats->nr_unknown_id != 0) {
1603 ui__warning("%u samples with id not present in the header\n",
1604 stats->nr_unknown_id);
1605 }
1606
1607 if (stats->nr_invalid_chains != 0) {
1608 ui__warning("Found invalid callchains!\n\n"
1609 "%u out of %u events were discarded for this reason.\n\n"
1610 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1611 stats->nr_invalid_chains,
1612 stats->nr_events[PERF_RECORD_SAMPLE]);
1613 }
1614
1615 if (stats->nr_unprocessable_samples != 0) {
1616 ui__warning("%u unprocessable samples recorded.\n"
1617 "Do you have a KVM guest running and not using 'perf kvm'?\n",
1618 stats->nr_unprocessable_samples);
1619 }
1620
1621 perf_session__warn_order(session);
1622
1623 events_stats__auxtrace_error_warn(stats);
1624
1625 if (stats->nr_proc_map_timeout != 0) {
1626 ui__warning("%d map information files for pre-existing threads were\n"
1627 "not processed, if there are samples for addresses they\n"
1628 "will not be resolved, you may find out which are these\n"
1629 "threads by running with -v and redirecting the output\n"
1630 "to a file.\n"
1631 "The time limit to process proc map is too short?\n"
1632 "Increase it by --proc-map-timeout\n",
1633 stats->nr_proc_map_timeout);
1634 }
1635 }
1636
1637 static int perf_session__flush_thread_stack(struct thread *thread,
1638 void *p __maybe_unused)
1639 {
1640 return thread_stack__flush(thread);
1641 }
1642
1643 static int perf_session__flush_thread_stacks(struct perf_session *session)
1644 {
1645 return machines__for_each_thread(&session->machines,
1646 perf_session__flush_thread_stack,
1647 NULL);
1648 }
1649
1650 volatile int session_done;
1651
1652 static int __perf_session__process_pipe_events(struct perf_session *session)
1653 {
1654 struct ordered_events *oe = &session->ordered_events;
1655 struct perf_tool *tool = session->tool;
1656 int fd = perf_data_file__fd(session->file);
1657 union perf_event *event;
1658 uint32_t size, cur_size = 0;
1659 void *buf = NULL;
1660 s64 skip = 0;
1661 u64 head;
1662 ssize_t err;
1663 void *p;
1664
1665 perf_tool__fill_defaults(tool);
1666
1667 head = 0;
1668 cur_size = sizeof(union perf_event);
1669
1670 buf = malloc(cur_size);
1671 if (!buf)
1672 return -errno;
1673 ordered_events__set_copy_on_queue(oe, true);
1674 more:
1675 event = buf;
1676 err = readn(fd, event, sizeof(struct perf_event_header));
1677 if (err <= 0) {
1678 if (err == 0)
1679 goto done;
1680
1681 pr_err("failed to read event header\n");
1682 goto out_err;
1683 }
1684
1685 if (session->header.needs_swap)
1686 perf_event_header__bswap(&event->header);
1687
1688 size = event->header.size;
1689 if (size < sizeof(struct perf_event_header)) {
1690 pr_err("bad event header size\n");
1691 goto out_err;
1692 }
1693
1694 if (size > cur_size) {
1695 void *new = realloc(buf, size);
1696 if (!new) {
1697 pr_err("failed to allocate memory to read event\n");
1698 goto out_err;
1699 }
1700 buf = new;
1701 cur_size = size;
1702 event = buf;
1703 }
1704 p = event;
1705 p += sizeof(struct perf_event_header);
1706
1707 if (size - sizeof(struct perf_event_header)) {
1708 err = readn(fd, p, size - sizeof(struct perf_event_header));
1709 if (err <= 0) {
1710 if (err == 0) {
1711 pr_err("unexpected end of event stream\n");
1712 goto done;
1713 }
1714
1715 pr_err("failed to read event data\n");
1716 goto out_err;
1717 }
1718 }
1719
1720 if ((skip = perf_session__process_event(session, event, head)) < 0) {
1721 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1722 head, event->header.size, event->header.type);
1723 err = -EINVAL;
1724 goto out_err;
1725 }
1726
1727 head += size;
1728
1729 if (skip > 0)
1730 head += skip;
1731
1732 if (!session_done())
1733 goto more;
1734 done:
1735 /* do the final flush for ordered samples */
1736 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1737 if (err)
1738 goto out_err;
1739 err = auxtrace__flush_events(session, tool);
1740 if (err)
1741 goto out_err;
1742 err = perf_session__flush_thread_stacks(session);
1743 out_err:
1744 free(buf);
1745 perf_session__warn_about_errors(session);
1746 ordered_events__free(&session->ordered_events);
1747 auxtrace__free_events(session);
1748 return err;
1749 }
1750
1751 static union perf_event *
1752 fetch_mmaped_event(struct perf_session *session,
1753 u64 head, size_t mmap_size, char *buf)
1754 {
1755 union perf_event *event;
1756
1757 /*
1758 * Ensure we have enough space remaining to read
1759 * the size of the event in the headers.
1760 */
1761 if (head + sizeof(event->header) > mmap_size)
1762 return NULL;
1763
1764 event = (union perf_event *)(buf + head);
1765
1766 if (session->header.needs_swap)
1767 perf_event_header__bswap(&event->header);
1768
1769 if (head + event->header.size > mmap_size) {
1770 /* We're not fetching the event so swap back again */
1771 if (session->header.needs_swap)
1772 perf_event_header__bswap(&event->header);
1773 return NULL;
1774 }
1775
1776 return event;
1777 }
1778
1779 /*
1780 * On 64bit we can mmap the data file in one go. No need for tiny mmap
1781 * slices. On 32bit we use 32MB.
1782 */
1783 #if BITS_PER_LONG == 64
1784 #define MMAP_SIZE ULLONG_MAX
1785 #define NUM_MMAPS 1
1786 #else
1787 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1788 #define NUM_MMAPS 128
1789 #endif
1790
1791 static int __perf_session__process_events(struct perf_session *session,
1792 u64 data_offset, u64 data_size,
1793 u64 file_size)
1794 {
1795 struct ordered_events *oe = &session->ordered_events;
1796 struct perf_tool *tool = session->tool;
1797 int fd = perf_data_file__fd(session->file);
1798 u64 head, page_offset, file_offset, file_pos, size;
1799 int err, mmap_prot, mmap_flags, map_idx = 0;
1800 size_t mmap_size;
1801 char *buf, *mmaps[NUM_MMAPS];
1802 union perf_event *event;
1803 struct ui_progress prog;
1804 s64 skip;
1805
1806 perf_tool__fill_defaults(tool);
1807
1808 page_offset = page_size * (data_offset / page_size);
1809 file_offset = page_offset;
1810 head = data_offset - page_offset;
1811
1812 if (data_size == 0)
1813 goto out;
1814
1815 if (data_offset + data_size < file_size)
1816 file_size = data_offset + data_size;
1817
1818 ui_progress__init(&prog, file_size, "Processing events...");
1819
1820 mmap_size = MMAP_SIZE;
1821 if (mmap_size > file_size) {
1822 mmap_size = file_size;
1823 session->one_mmap = true;
1824 }
1825
1826 memset(mmaps, 0, sizeof(mmaps));
1827
1828 mmap_prot = PROT_READ;
1829 mmap_flags = MAP_SHARED;
1830
1831 if (session->header.needs_swap) {
1832 mmap_prot |= PROT_WRITE;
1833 mmap_flags = MAP_PRIVATE;
1834 }
1835 remap:
1836 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1837 file_offset);
1838 if (buf == MAP_FAILED) {
1839 pr_err("failed to mmap file\n");
1840 err = -errno;
1841 goto out_err;
1842 }
1843 mmaps[map_idx] = buf;
1844 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1845 file_pos = file_offset + head;
1846 if (session->one_mmap) {
1847 session->one_mmap_addr = buf;
1848 session->one_mmap_offset = file_offset;
1849 }
1850
1851 more:
1852 event = fetch_mmaped_event(session, head, mmap_size, buf);
1853 if (!event) {
1854 if (mmaps[map_idx]) {
1855 munmap(mmaps[map_idx], mmap_size);
1856 mmaps[map_idx] = NULL;
1857 }
1858
1859 page_offset = page_size * (head / page_size);
1860 file_offset += page_offset;
1861 head -= page_offset;
1862 goto remap;
1863 }
1864
1865 size = event->header.size;
1866
1867 if (size < sizeof(struct perf_event_header) ||
1868 (skip = perf_session__process_event(session, event, file_pos)) < 0) {
1869 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1870 file_offset + head, event->header.size,
1871 event->header.type);
1872 err = -EINVAL;
1873 goto out_err;
1874 }
1875
1876 if (skip)
1877 size += skip;
1878
1879 head += size;
1880 file_pos += size;
1881
1882 ui_progress__update(&prog, size);
1883
1884 if (session_done())
1885 goto out;
1886
1887 if (file_pos < file_size)
1888 goto more;
1889
1890 out:
1891 /* do the final flush for ordered samples */
1892 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1893 if (err)
1894 goto out_err;
1895 err = auxtrace__flush_events(session, tool);
1896 if (err)
1897 goto out_err;
1898 err = perf_session__flush_thread_stacks(session);
1899 out_err:
1900 ui_progress__finish();
1901 perf_session__warn_about_errors(session);
1902 /*
1903 * We may switching perf.data output, make ordered_events
1904 * reusable.
1905 */
1906 ordered_events__reinit(&session->ordered_events);
1907 auxtrace__free_events(session);
1908 session->one_mmap = false;
1909 return err;
1910 }
1911
1912 int perf_session__process_events(struct perf_session *session)
1913 {
1914 u64 size = perf_data_file__size(session->file);
1915 int err;
1916
1917 if (perf_session__register_idle_thread(session) < 0)
1918 return -ENOMEM;
1919
1920 if (!perf_data_file__is_pipe(session->file))
1921 err = __perf_session__process_events(session,
1922 session->header.data_offset,
1923 session->header.data_size, size);
1924 else
1925 err = __perf_session__process_pipe_events(session);
1926
1927 return err;
1928 }
1929
1930 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1931 {
1932 struct perf_evsel *evsel;
1933
1934 evlist__for_each_entry(session->evlist, evsel) {
1935 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1936 return true;
1937 }
1938
1939 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1940 return false;
1941 }
1942
1943 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1944 const char *symbol_name, u64 addr)
1945 {
1946 char *bracket;
1947 int i;
1948 struct ref_reloc_sym *ref;
1949
1950 ref = zalloc(sizeof(struct ref_reloc_sym));
1951 if (ref == NULL)
1952 return -ENOMEM;
1953
1954 ref->name = strdup(symbol_name);
1955 if (ref->name == NULL) {
1956 free(ref);
1957 return -ENOMEM;
1958 }
1959
1960 bracket = strchr(ref->name, ']');
1961 if (bracket)
1962 *bracket = '\0';
1963
1964 ref->addr = addr;
1965
1966 for (i = 0; i < MAP__NR_TYPES; ++i) {
1967 struct kmap *kmap = map__kmap(maps[i]);
1968
1969 if (!kmap)
1970 continue;
1971 kmap->ref_reloc_sym = ref;
1972 }
1973
1974 return 0;
1975 }
1976
1977 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
1978 {
1979 return machines__fprintf_dsos(&session->machines, fp);
1980 }
1981
1982 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
1983 bool (skip)(struct dso *dso, int parm), int parm)
1984 {
1985 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
1986 }
1987
1988 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1989 {
1990 size_t ret;
1991 const char *msg = "";
1992
1993 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
1994 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
1995
1996 ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
1997
1998 ret += events_stats__fprintf(&session->evlist->stats, fp);
1999 return ret;
2000 }
2001
2002 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
2003 {
2004 /*
2005 * FIXME: Here we have to actually print all the machines in this
2006 * session, not just the host...
2007 */
2008 return machine__fprintf(&session->machines.host, fp);
2009 }
2010
2011 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
2012 unsigned int type)
2013 {
2014 struct perf_evsel *pos;
2015
2016 evlist__for_each_entry(session->evlist, pos) {
2017 if (pos->attr.type == type)
2018 return pos;
2019 }
2020 return NULL;
2021 }
2022
2023 int perf_session__cpu_bitmap(struct perf_session *session,
2024 const char *cpu_list, unsigned long *cpu_bitmap)
2025 {
2026 int i, err = -1;
2027 struct cpu_map *map;
2028
2029 for (i = 0; i < PERF_TYPE_MAX; ++i) {
2030 struct perf_evsel *evsel;
2031
2032 evsel = perf_session__find_first_evtype(session, i);
2033 if (!evsel)
2034 continue;
2035
2036 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
2037 pr_err("File does not contain CPU events. "
2038 "Remove -C option to proceed.\n");
2039 return -1;
2040 }
2041 }
2042
2043 map = cpu_map__new(cpu_list);
2044 if (map == NULL) {
2045 pr_err("Invalid cpu_list\n");
2046 return -1;
2047 }
2048
2049 for (i = 0; i < map->nr; i++) {
2050 int cpu = map->map[i];
2051
2052 if (cpu >= MAX_NR_CPUS) {
2053 pr_err("Requested CPU %d too large. "
2054 "Consider raising MAX_NR_CPUS\n", cpu);
2055 goto out_delete_map;
2056 }
2057
2058 set_bit(cpu, cpu_bitmap);
2059 }
2060
2061 err = 0;
2062
2063 out_delete_map:
2064 cpu_map__put(map);
2065 return err;
2066 }
2067
2068 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
2069 bool full)
2070 {
2071 if (session == NULL || fp == NULL)
2072 return;
2073
2074 fprintf(fp, "# ========\n");
2075 perf_header__fprintf_info(session, fp, full);
2076 fprintf(fp, "# ========\n#\n");
2077 }
2078
2079
2080 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
2081 const struct perf_evsel_str_handler *assocs,
2082 size_t nr_assocs)
2083 {
2084 struct perf_evsel *evsel;
2085 size_t i;
2086 int err;
2087
2088 for (i = 0; i < nr_assocs; i++) {
2089 /*
2090 * Adding a handler for an event not in the session,
2091 * just ignore it.
2092 */
2093 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
2094 if (evsel == NULL)
2095 continue;
2096
2097 err = -EEXIST;
2098 if (evsel->handler != NULL)
2099 goto out;
2100 evsel->handler = assocs[i].handler;
2101 }
2102
2103 err = 0;
2104 out:
2105 return err;
2106 }
2107
2108 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused,
2109 union perf_event *event,
2110 struct perf_session *session)
2111 {
2112 struct perf_evlist *evlist = session->evlist;
2113 struct id_index_event *ie = &event->id_index;
2114 size_t i, nr, max_nr;
2115
2116 max_nr = (ie->header.size - sizeof(struct id_index_event)) /
2117 sizeof(struct id_index_entry);
2118 nr = ie->nr;
2119 if (nr > max_nr)
2120 return -EINVAL;
2121
2122 if (dump_trace)
2123 fprintf(stdout, " nr: %zu\n", nr);
2124
2125 for (i = 0; i < nr; i++) {
2126 struct id_index_entry *e = &ie->entries[i];
2127 struct perf_sample_id *sid;
2128
2129 if (dump_trace) {
2130 fprintf(stdout, " ... id: %"PRIu64, e->id);
2131 fprintf(stdout, " idx: %"PRIu64, e->idx);
2132 fprintf(stdout, " cpu: %"PRId64, e->cpu);
2133 fprintf(stdout, " tid: %"PRId64"\n", e->tid);
2134 }
2135
2136 sid = perf_evlist__id2sid(evlist, e->id);
2137 if (!sid)
2138 return -ENOENT;
2139 sid->idx = e->idx;
2140 sid->cpu = e->cpu;
2141 sid->tid = e->tid;
2142 }
2143 return 0;
2144 }
2145
2146 int perf_event__synthesize_id_index(struct perf_tool *tool,
2147 perf_event__handler_t process,
2148 struct perf_evlist *evlist,
2149 struct machine *machine)
2150 {
2151 union perf_event *ev;
2152 struct perf_evsel *evsel;
2153 size_t nr = 0, i = 0, sz, max_nr, n;
2154 int err;
2155
2156 pr_debug2("Synthesizing id index\n");
2157
2158 max_nr = (UINT16_MAX - sizeof(struct id_index_event)) /
2159 sizeof(struct id_index_entry);
2160
2161 evlist__for_each_entry(evlist, evsel)
2162 nr += evsel->ids;
2163
2164 n = nr > max_nr ? max_nr : nr;
2165 sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry);
2166 ev = zalloc(sz);
2167 if (!ev)
2168 return -ENOMEM;
2169
2170 ev->id_index.header.type = PERF_RECORD_ID_INDEX;
2171 ev->id_index.header.size = sz;
2172 ev->id_index.nr = n;
2173
2174 evlist__for_each_entry(evlist, evsel) {
2175 u32 j;
2176
2177 for (j = 0; j < evsel->ids; j++) {
2178 struct id_index_entry *e;
2179 struct perf_sample_id *sid;
2180
2181 if (i >= n) {
2182 err = process(tool, ev, NULL, machine);
2183 if (err)
2184 goto out_err;
2185 nr -= n;
2186 i = 0;
2187 }
2188
2189 e = &ev->id_index.entries[i++];
2190
2191 e->id = evsel->id[j];
2192
2193 sid = perf_evlist__id2sid(evlist, e->id);
2194 if (!sid) {
2195 free(ev);
2196 return -ENOENT;
2197 }
2198
2199 e->idx = sid->idx;
2200 e->cpu = sid->cpu;
2201 e->tid = sid->tid;
2202 }
2203 }
2204
2205 sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry);
2206 ev->id_index.header.size = sz;
2207 ev->id_index.nr = nr;
2208
2209 err = process(tool, ev, NULL, machine);
2210 out_err:
2211 free(ev);
2212
2213 return err;
2214 }
CRIS linux kernel tree