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