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66cae50b5c4c7ad7630d385effd0fa0c117171b9
[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
19 static int perf_session__open(struct perf_session *session)
20 {
21 struct perf_data_file *file = session->file;
22
23 if (perf_session__read_header(session) < 0) {
24 pr_err("incompatible file format (rerun with -v to learn more)");
25 return -1;
26 }
27
28 if (perf_data_file__is_pipe(file))
29 return 0;
30
31 if (!perf_evlist__valid_sample_type(session->evlist)) {
32 pr_err("non matching sample_type");
33 return -1;
34 }
35
36 if (!perf_evlist__valid_sample_id_all(session->evlist)) {
37 pr_err("non matching sample_id_all");
38 return -1;
39 }
40
41 if (!perf_evlist__valid_read_format(session->evlist)) {
42 pr_err("non matching read_format");
43 return -1;
44 }
45
46 return 0;
47 }
48
49 void perf_session__set_id_hdr_size(struct perf_session *session)
50 {
51 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
52
53 machines__set_id_hdr_size(&session->machines, id_hdr_size);
54 }
55
56 int perf_session__create_kernel_maps(struct perf_session *session)
57 {
58 int ret = machine__create_kernel_maps(&session->machines.host);
59
60 if (ret >= 0)
61 ret = machines__create_guest_kernel_maps(&session->machines);
62 return ret;
63 }
64
65 static void perf_session__destroy_kernel_maps(struct perf_session *session)
66 {
67 machines__destroy_kernel_maps(&session->machines);
68 }
69
70 static bool perf_session__has_comm_exec(struct perf_session *session)
71 {
72 struct perf_evsel *evsel;
73
74 evlist__for_each(session->evlist, evsel) {
75 if (evsel->attr.comm_exec)
76 return true;
77 }
78
79 return false;
80 }
81
82 static void perf_session__set_comm_exec(struct perf_session *session)
83 {
84 bool comm_exec = perf_session__has_comm_exec(session);
85
86 machines__set_comm_exec(&session->machines, comm_exec);
87 }
88
89 struct perf_session *perf_session__new(struct perf_data_file *file,
90 bool repipe, struct perf_tool *tool)
91 {
92 struct perf_session *session = zalloc(sizeof(*session));
93
94 if (!session)
95 goto out;
96
97 session->repipe = repipe;
98 ordered_events__init(&session->ordered_events);
99 machines__init(&session->machines);
100
101 if (file) {
102 if (perf_data_file__open(file))
103 goto out_delete;
104
105 session->file = file;
106
107 if (perf_data_file__is_read(file)) {
108 if (perf_session__open(session) < 0)
109 goto out_close;
110
111 perf_session__set_id_hdr_size(session);
112 perf_session__set_comm_exec(session);
113 }
114 }
115
116 if (!file || perf_data_file__is_write(file)) {
117 /*
118 * In O_RDONLY mode this will be performed when reading the
119 * kernel MMAP event, in perf_event__process_mmap().
120 */
121 if (perf_session__create_kernel_maps(session) < 0)
122 pr_warning("Cannot read kernel map\n");
123 }
124
125 if (tool && tool->ordering_requires_timestamps &&
126 tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) {
127 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
128 tool->ordered_events = false;
129 }
130
131 return session;
132
133 out_close:
134 perf_data_file__close(file);
135 out_delete:
136 perf_session__delete(session);
137 out:
138 return NULL;
139 }
140
141 static void perf_session__delete_dead_threads(struct perf_session *session)
142 {
143 machine__delete_dead_threads(&session->machines.host);
144 }
145
146 static void perf_session__delete_threads(struct perf_session *session)
147 {
148 machine__delete_threads(&session->machines.host);
149 }
150
151 static void perf_session_env__delete(struct perf_session_env *env)
152 {
153 zfree(&env->hostname);
154 zfree(&env->os_release);
155 zfree(&env->version);
156 zfree(&env->arch);
157 zfree(&env->cpu_desc);
158 zfree(&env->cpuid);
159
160 zfree(&env->cmdline);
161 zfree(&env->sibling_cores);
162 zfree(&env->sibling_threads);
163 zfree(&env->numa_nodes);
164 zfree(&env->pmu_mappings);
165 }
166
167 void perf_session__delete(struct perf_session *session)
168 {
169 perf_session__destroy_kernel_maps(session);
170 perf_session__delete_dead_threads(session);
171 perf_session__delete_threads(session);
172 perf_session_env__delete(&session->header.env);
173 machines__exit(&session->machines);
174 if (session->file)
175 perf_data_file__close(session->file);
176 free(session);
177 }
178
179 static int process_event_synth_tracing_data_stub(struct perf_tool *tool
180 __maybe_unused,
181 union perf_event *event
182 __maybe_unused,
183 struct perf_session *session
184 __maybe_unused)
185 {
186 dump_printf(": unhandled!\n");
187 return 0;
188 }
189
190 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
191 union perf_event *event __maybe_unused,
192 struct perf_evlist **pevlist
193 __maybe_unused)
194 {
195 dump_printf(": unhandled!\n");
196 return 0;
197 }
198
199 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
200 union perf_event *event __maybe_unused,
201 struct perf_sample *sample __maybe_unused,
202 struct perf_evsel *evsel __maybe_unused,
203 struct machine *machine __maybe_unused)
204 {
205 dump_printf(": unhandled!\n");
206 return 0;
207 }
208
209 static int process_event_stub(struct perf_tool *tool __maybe_unused,
210 union perf_event *event __maybe_unused,
211 struct perf_sample *sample __maybe_unused,
212 struct machine *machine __maybe_unused)
213 {
214 dump_printf(": unhandled!\n");
215 return 0;
216 }
217
218 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
219 union perf_event *event __maybe_unused,
220 struct perf_session *perf_session
221 __maybe_unused)
222 {
223 dump_printf(": unhandled!\n");
224 return 0;
225 }
226
227 static int process_finished_round(struct perf_tool *tool,
228 union perf_event *event,
229 struct perf_session *session);
230
231 void perf_tool__fill_defaults(struct perf_tool *tool)
232 {
233 if (tool->sample == NULL)
234 tool->sample = process_event_sample_stub;
235 if (tool->mmap == NULL)
236 tool->mmap = process_event_stub;
237 if (tool->mmap2 == NULL)
238 tool->mmap2 = process_event_stub;
239 if (tool->comm == NULL)
240 tool->comm = process_event_stub;
241 if (tool->fork == NULL)
242 tool->fork = process_event_stub;
243 if (tool->exit == NULL)
244 tool->exit = process_event_stub;
245 if (tool->lost == NULL)
246 tool->lost = perf_event__process_lost;
247 if (tool->read == NULL)
248 tool->read = process_event_sample_stub;
249 if (tool->throttle == NULL)
250 tool->throttle = process_event_stub;
251 if (tool->unthrottle == NULL)
252 tool->unthrottle = process_event_stub;
253 if (tool->attr == NULL)
254 tool->attr = process_event_synth_attr_stub;
255 if (tool->tracing_data == NULL)
256 tool->tracing_data = process_event_synth_tracing_data_stub;
257 if (tool->build_id == NULL)
258 tool->build_id = process_finished_round_stub;
259 if (tool->finished_round == NULL) {
260 if (tool->ordered_events)
261 tool->finished_round = process_finished_round;
262 else
263 tool->finished_round = process_finished_round_stub;
264 }
265 }
266
267 static void swap_sample_id_all(union perf_event *event, void *data)
268 {
269 void *end = (void *) event + event->header.size;
270 int size = end - data;
271
272 BUG_ON(size % sizeof(u64));
273 mem_bswap_64(data, size);
274 }
275
276 static void perf_event__all64_swap(union perf_event *event,
277 bool sample_id_all __maybe_unused)
278 {
279 struct perf_event_header *hdr = &event->header;
280 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
281 }
282
283 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
284 {
285 event->comm.pid = bswap_32(event->comm.pid);
286 event->comm.tid = bswap_32(event->comm.tid);
287
288 if (sample_id_all) {
289 void *data = &event->comm.comm;
290
291 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
292 swap_sample_id_all(event, data);
293 }
294 }
295
296 static void perf_event__mmap_swap(union perf_event *event,
297 bool sample_id_all)
298 {
299 event->mmap.pid = bswap_32(event->mmap.pid);
300 event->mmap.tid = bswap_32(event->mmap.tid);
301 event->mmap.start = bswap_64(event->mmap.start);
302 event->mmap.len = bswap_64(event->mmap.len);
303 event->mmap.pgoff = bswap_64(event->mmap.pgoff);
304
305 if (sample_id_all) {
306 void *data = &event->mmap.filename;
307
308 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
309 swap_sample_id_all(event, data);
310 }
311 }
312
313 static void perf_event__mmap2_swap(union perf_event *event,
314 bool sample_id_all)
315 {
316 event->mmap2.pid = bswap_32(event->mmap2.pid);
317 event->mmap2.tid = bswap_32(event->mmap2.tid);
318 event->mmap2.start = bswap_64(event->mmap2.start);
319 event->mmap2.len = bswap_64(event->mmap2.len);
320 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
321 event->mmap2.maj = bswap_32(event->mmap2.maj);
322 event->mmap2.min = bswap_32(event->mmap2.min);
323 event->mmap2.ino = bswap_64(event->mmap2.ino);
324
325 if (sample_id_all) {
326 void *data = &event->mmap2.filename;
327
328 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
329 swap_sample_id_all(event, data);
330 }
331 }
332 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
333 {
334 event->fork.pid = bswap_32(event->fork.pid);
335 event->fork.tid = bswap_32(event->fork.tid);
336 event->fork.ppid = bswap_32(event->fork.ppid);
337 event->fork.ptid = bswap_32(event->fork.ptid);
338 event->fork.time = bswap_64(event->fork.time);
339
340 if (sample_id_all)
341 swap_sample_id_all(event, &event->fork + 1);
342 }
343
344 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
345 {
346 event->read.pid = bswap_32(event->read.pid);
347 event->read.tid = bswap_32(event->read.tid);
348 event->read.value = bswap_64(event->read.value);
349 event->read.time_enabled = bswap_64(event->read.time_enabled);
350 event->read.time_running = bswap_64(event->read.time_running);
351 event->read.id = bswap_64(event->read.id);
352
353 if (sample_id_all)
354 swap_sample_id_all(event, &event->read + 1);
355 }
356
357 static void perf_event__throttle_swap(union perf_event *event,
358 bool sample_id_all)
359 {
360 event->throttle.time = bswap_64(event->throttle.time);
361 event->throttle.id = bswap_64(event->throttle.id);
362 event->throttle.stream_id = bswap_64(event->throttle.stream_id);
363
364 if (sample_id_all)
365 swap_sample_id_all(event, &event->throttle + 1);
366 }
367
368 static u8 revbyte(u8 b)
369 {
370 int rev = (b >> 4) | ((b & 0xf) << 4);
371 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
372 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
373 return (u8) rev;
374 }
375
376 /*
377 * XXX this is hack in attempt to carry flags bitfield
378 * throught endian village. ABI says:
379 *
380 * Bit-fields are allocated from right to left (least to most significant)
381 * on little-endian implementations and from left to right (most to least
382 * significant) on big-endian implementations.
383 *
384 * The above seems to be byte specific, so we need to reverse each
385 * byte of the bitfield. 'Internet' also says this might be implementation
386 * specific and we probably need proper fix and carry perf_event_attr
387 * bitfield flags in separate data file FEAT_ section. Thought this seems
388 * to work for now.
389 */
390 static void swap_bitfield(u8 *p, unsigned len)
391 {
392 unsigned i;
393
394 for (i = 0; i < len; i++) {
395 *p = revbyte(*p);
396 p++;
397 }
398 }
399
400 /* exported for swapping attributes in file header */
401 void perf_event__attr_swap(struct perf_event_attr *attr)
402 {
403 attr->type = bswap_32(attr->type);
404 attr->size = bswap_32(attr->size);
405 attr->config = bswap_64(attr->config);
406 attr->sample_period = bswap_64(attr->sample_period);
407 attr->sample_type = bswap_64(attr->sample_type);
408 attr->read_format = bswap_64(attr->read_format);
409 attr->wakeup_events = bswap_32(attr->wakeup_events);
410 attr->bp_type = bswap_32(attr->bp_type);
411 attr->bp_addr = bswap_64(attr->bp_addr);
412 attr->bp_len = bswap_64(attr->bp_len);
413 attr->branch_sample_type = bswap_64(attr->branch_sample_type);
414 attr->sample_regs_user = bswap_64(attr->sample_regs_user);
415 attr->sample_stack_user = bswap_32(attr->sample_stack_user);
416
417 swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64));
418 }
419
420 static void perf_event__hdr_attr_swap(union perf_event *event,
421 bool sample_id_all __maybe_unused)
422 {
423 size_t size;
424
425 perf_event__attr_swap(&event->attr.attr);
426
427 size = event->header.size;
428 size -= (void *)&event->attr.id - (void *)event;
429 mem_bswap_64(event->attr.id, size);
430 }
431
432 static void perf_event__event_type_swap(union perf_event *event,
433 bool sample_id_all __maybe_unused)
434 {
435 event->event_type.event_type.event_id =
436 bswap_64(event->event_type.event_type.event_id);
437 }
438
439 static void perf_event__tracing_data_swap(union perf_event *event,
440 bool sample_id_all __maybe_unused)
441 {
442 event->tracing_data.size = bswap_32(event->tracing_data.size);
443 }
444
445 typedef void (*perf_event__swap_op)(union perf_event *event,
446 bool sample_id_all);
447
448 static perf_event__swap_op perf_event__swap_ops[] = {
449 [PERF_RECORD_MMAP] = perf_event__mmap_swap,
450 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap,
451 [PERF_RECORD_COMM] = perf_event__comm_swap,
452 [PERF_RECORD_FORK] = perf_event__task_swap,
453 [PERF_RECORD_EXIT] = perf_event__task_swap,
454 [PERF_RECORD_LOST] = perf_event__all64_swap,
455 [PERF_RECORD_READ] = perf_event__read_swap,
456 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap,
457 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap,
458 [PERF_RECORD_SAMPLE] = perf_event__all64_swap,
459 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
460 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
461 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
462 [PERF_RECORD_HEADER_BUILD_ID] = NULL,
463 [PERF_RECORD_HEADER_MAX] = NULL,
464 };
465
466 /*
467 * When perf record finishes a pass on every buffers, it records this pseudo
468 * event.
469 * We record the max timestamp t found in the pass n.
470 * Assuming these timestamps are monotonic across cpus, we know that if
471 * a buffer still has events with timestamps below t, they will be all
472 * available and then read in the pass n + 1.
473 * Hence when we start to read the pass n + 2, we can safely flush every
474 * events with timestamps below t.
475 *
476 * ============ PASS n =================
477 * CPU 0 | CPU 1
478 * |
479 * cnt1 timestamps | cnt2 timestamps
480 * 1 | 2
481 * 2 | 3
482 * - | 4 <--- max recorded
483 *
484 * ============ PASS n + 1 ==============
485 * CPU 0 | CPU 1
486 * |
487 * cnt1 timestamps | cnt2 timestamps
488 * 3 | 5
489 * 4 | 6
490 * 5 | 7 <---- max recorded
491 *
492 * Flush every events below timestamp 4
493 *
494 * ============ PASS n + 2 ==============
495 * CPU 0 | CPU 1
496 * |
497 * cnt1 timestamps | cnt2 timestamps
498 * 6 | 8
499 * 7 | 9
500 * - | 10
501 *
502 * Flush every events below timestamp 7
503 * etc...
504 */
505 static int process_finished_round(struct perf_tool *tool,
506 union perf_event *event __maybe_unused,
507 struct perf_session *session)
508 {
509 return ordered_events__flush(session, tool, OE_FLUSH__ROUND);
510 }
511
512 int perf_session_queue_event(struct perf_session *s, union perf_event *event,
513 struct perf_tool *tool, struct perf_sample *sample,
514 u64 file_offset)
515 {
516 struct ordered_events *oe = &s->ordered_events;
517 u64 timestamp = sample->time;
518 struct ordered_event *new;
519
520 if (!timestamp || timestamp == ~0ULL)
521 return -ETIME;
522
523 if (timestamp < oe->last_flush) {
524 WARN_ONCE(1, "Timestamp below last timeslice flush\n");
525
526 pr_oe_time(timestamp, "out of order event");
527 pr_oe_time(oe->last_flush, "last flush, last_flush_type %d\n",
528 oe->last_flush_type);
529
530 /* We could get out of order messages after forced flush. */
531 if (oe->last_flush_type != OE_FLUSH__HALF)
532 return -EINVAL;
533 }
534
535 new = ordered_events__new(oe, timestamp);
536 if (!new) {
537 ordered_events__flush(s, tool, OE_FLUSH__HALF);
538 new = ordered_events__new(oe, timestamp);
539 }
540
541 if (!new)
542 return -ENOMEM;
543
544 new->file_offset = file_offset;
545 new->event = event;
546 return 0;
547 }
548
549 static void callchain__printf(struct perf_sample *sample)
550 {
551 unsigned int i;
552
553 printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr);
554
555 for (i = 0; i < sample->callchain->nr; i++)
556 printf("..... %2d: %016" PRIx64 "\n",
557 i, sample->callchain->ips[i]);
558 }
559
560 static void branch_stack__printf(struct perf_sample *sample)
561 {
562 uint64_t i;
563
564 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
565
566 for (i = 0; i < sample->branch_stack->nr; i++)
567 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n",
568 i, sample->branch_stack->entries[i].from,
569 sample->branch_stack->entries[i].to);
570 }
571
572 static void regs_dump__printf(u64 mask, u64 *regs)
573 {
574 unsigned rid, i = 0;
575
576 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
577 u64 val = regs[i++];
578
579 printf(".... %-5s 0x%" PRIx64 "\n",
580 perf_reg_name(rid), val);
581 }
582 }
583
584 static void regs_user__printf(struct perf_sample *sample)
585 {
586 struct regs_dump *user_regs = &sample->user_regs;
587
588 if (user_regs->regs) {
589 u64 mask = user_regs->mask;
590 printf("... user regs: mask 0x%" PRIx64 "\n", mask);
591 regs_dump__printf(mask, user_regs->regs);
592 }
593 }
594
595 static void stack_user__printf(struct stack_dump *dump)
596 {
597 printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
598 dump->size, dump->offset);
599 }
600
601 static void perf_session__print_tstamp(struct perf_session *session,
602 union perf_event *event,
603 struct perf_sample *sample)
604 {
605 u64 sample_type = __perf_evlist__combined_sample_type(session->evlist);
606
607 if (event->header.type != PERF_RECORD_SAMPLE &&
608 !perf_evlist__sample_id_all(session->evlist)) {
609 fputs("-1 -1 ", stdout);
610 return;
611 }
612
613 if ((sample_type & PERF_SAMPLE_CPU))
614 printf("%u ", sample->cpu);
615
616 if (sample_type & PERF_SAMPLE_TIME)
617 printf("%" PRIu64 " ", sample->time);
618 }
619
620 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
621 {
622 printf("... sample_read:\n");
623
624 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
625 printf("...... time enabled %016" PRIx64 "\n",
626 sample->read.time_enabled);
627
628 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
629 printf("...... time running %016" PRIx64 "\n",
630 sample->read.time_running);
631
632 if (read_format & PERF_FORMAT_GROUP) {
633 u64 i;
634
635 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
636
637 for (i = 0; i < sample->read.group.nr; i++) {
638 struct sample_read_value *value;
639
640 value = &sample->read.group.values[i];
641 printf("..... id %016" PRIx64
642 ", value %016" PRIx64 "\n",
643 value->id, value->value);
644 }
645 } else
646 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
647 sample->read.one.id, sample->read.one.value);
648 }
649
650 static void dump_event(struct perf_session *session, union perf_event *event,
651 u64 file_offset, struct perf_sample *sample)
652 {
653 if (!dump_trace)
654 return;
655
656 printf("\n%#" PRIx64 " [%#x]: event: %d\n",
657 file_offset, event->header.size, event->header.type);
658
659 trace_event(event);
660
661 if (sample)
662 perf_session__print_tstamp(session, event, sample);
663
664 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
665 event->header.size, perf_event__name(event->header.type));
666 }
667
668 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
669 struct perf_sample *sample)
670 {
671 u64 sample_type;
672
673 if (!dump_trace)
674 return;
675
676 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
677 event->header.misc, sample->pid, sample->tid, sample->ip,
678 sample->period, sample->addr);
679
680 sample_type = evsel->attr.sample_type;
681
682 if (sample_type & PERF_SAMPLE_CALLCHAIN)
683 callchain__printf(sample);
684
685 if (sample_type & PERF_SAMPLE_BRANCH_STACK)
686 branch_stack__printf(sample);
687
688 if (sample_type & PERF_SAMPLE_REGS_USER)
689 regs_user__printf(sample);
690
691 if (sample_type & PERF_SAMPLE_STACK_USER)
692 stack_user__printf(&sample->user_stack);
693
694 if (sample_type & PERF_SAMPLE_WEIGHT)
695 printf("... weight: %" PRIu64 "\n", sample->weight);
696
697 if (sample_type & PERF_SAMPLE_DATA_SRC)
698 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
699
700 if (sample_type & PERF_SAMPLE_TRANSACTION)
701 printf("... transaction: %" PRIx64 "\n", sample->transaction);
702
703 if (sample_type & PERF_SAMPLE_READ)
704 sample_read__printf(sample, evsel->attr.read_format);
705 }
706
707 static struct machine *
708 perf_session__find_machine_for_cpumode(struct perf_session *session,
709 union perf_event *event,
710 struct perf_sample *sample)
711 {
712 const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
713 struct machine *machine;
714
715 if (perf_guest &&
716 ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
717 (cpumode == PERF_RECORD_MISC_GUEST_USER))) {
718 u32 pid;
719
720 if (event->header.type == PERF_RECORD_MMAP
721 || event->header.type == PERF_RECORD_MMAP2)
722 pid = event->mmap.pid;
723 else
724 pid = sample->pid;
725
726 machine = perf_session__find_machine(session, pid);
727 if (!machine)
728 machine = perf_session__findnew_machine(session,
729 DEFAULT_GUEST_KERNEL_ID);
730 return machine;
731 }
732
733 return &session->machines.host;
734 }
735
736 static int deliver_sample_value(struct perf_session *session,
737 struct perf_tool *tool,
738 union perf_event *event,
739 struct perf_sample *sample,
740 struct sample_read_value *v,
741 struct machine *machine)
742 {
743 struct perf_sample_id *sid;
744
745 sid = perf_evlist__id2sid(session->evlist, v->id);
746 if (sid) {
747 sample->id = v->id;
748 sample->period = v->value - sid->period;
749 sid->period = v->value;
750 }
751
752 if (!sid || sid->evsel == NULL) {
753 ++session->stats.nr_unknown_id;
754 return 0;
755 }
756
757 return tool->sample(tool, event, sample, sid->evsel, machine);
758 }
759
760 static int deliver_sample_group(struct perf_session *session,
761 struct perf_tool *tool,
762 union perf_event *event,
763 struct perf_sample *sample,
764 struct machine *machine)
765 {
766 int ret = -EINVAL;
767 u64 i;
768
769 for (i = 0; i < sample->read.group.nr; i++) {
770 ret = deliver_sample_value(session, tool, event, sample,
771 &sample->read.group.values[i],
772 machine);
773 if (ret)
774 break;
775 }
776
777 return ret;
778 }
779
780 static int
781 perf_session__deliver_sample(struct perf_session *session,
782 struct perf_tool *tool,
783 union perf_event *event,
784 struct perf_sample *sample,
785 struct perf_evsel *evsel,
786 struct machine *machine)
787 {
788 /* We know evsel != NULL. */
789 u64 sample_type = evsel->attr.sample_type;
790 u64 read_format = evsel->attr.read_format;
791
792 /* Standard sample delievery. */
793 if (!(sample_type & PERF_SAMPLE_READ))
794 return tool->sample(tool, event, sample, evsel, machine);
795
796 /* For PERF_SAMPLE_READ we have either single or group mode. */
797 if (read_format & PERF_FORMAT_GROUP)
798 return deliver_sample_group(session, tool, event, sample,
799 machine);
800 else
801 return deliver_sample_value(session, tool, event, sample,
802 &sample->read.one, machine);
803 }
804
805 int perf_session__deliver_event(struct perf_session *session,
806 union perf_event *event,
807 struct perf_sample *sample,
808 struct perf_tool *tool, u64 file_offset)
809 {
810 struct perf_evsel *evsel;
811 struct machine *machine;
812
813 dump_event(session, event, file_offset, sample);
814
815 evsel = perf_evlist__id2evsel(session->evlist, sample->id);
816
817 machine = perf_session__find_machine_for_cpumode(session, event,
818 sample);
819
820 switch (event->header.type) {
821 case PERF_RECORD_SAMPLE:
822 dump_sample(evsel, event, sample);
823 if (evsel == NULL) {
824 ++session->stats.nr_unknown_id;
825 return 0;
826 }
827 if (machine == NULL) {
828 ++session->stats.nr_unprocessable_samples;
829 return 0;
830 }
831 return perf_session__deliver_sample(session, tool, event,
832 sample, evsel, machine);
833 case PERF_RECORD_MMAP:
834 return tool->mmap(tool, event, sample, machine);
835 case PERF_RECORD_MMAP2:
836 return tool->mmap2(tool, event, sample, machine);
837 case PERF_RECORD_COMM:
838 return tool->comm(tool, event, sample, machine);
839 case PERF_RECORD_FORK:
840 return tool->fork(tool, event, sample, machine);
841 case PERF_RECORD_EXIT:
842 return tool->exit(tool, event, sample, machine);
843 case PERF_RECORD_LOST:
844 if (tool->lost == perf_event__process_lost)
845 session->stats.total_lost += event->lost.lost;
846 return tool->lost(tool, event, sample, machine);
847 case PERF_RECORD_READ:
848 return tool->read(tool, event, sample, evsel, machine);
849 case PERF_RECORD_THROTTLE:
850 return tool->throttle(tool, event, sample, machine);
851 case PERF_RECORD_UNTHROTTLE:
852 return tool->unthrottle(tool, event, sample, machine);
853 default:
854 ++session->stats.nr_unknown_events;
855 return -1;
856 }
857 }
858
859 static s64 perf_session__process_user_event(struct perf_session *session,
860 union perf_event *event,
861 struct perf_tool *tool,
862 u64 file_offset)
863 {
864 int fd = perf_data_file__fd(session->file);
865 int err;
866
867 dump_event(session, event, file_offset, NULL);
868
869 /* These events are processed right away */
870 switch (event->header.type) {
871 case PERF_RECORD_HEADER_ATTR:
872 err = tool->attr(tool, event, &session->evlist);
873 if (err == 0) {
874 perf_session__set_id_hdr_size(session);
875 perf_session__set_comm_exec(session);
876 }
877 return err;
878 case PERF_RECORD_HEADER_EVENT_TYPE:
879 /*
880 * Depreceated, but we need to handle it for sake
881 * of old data files create in pipe mode.
882 */
883 return 0;
884 case PERF_RECORD_HEADER_TRACING_DATA:
885 /* setup for reading amidst mmap */
886 lseek(fd, file_offset, SEEK_SET);
887 return tool->tracing_data(tool, event, session);
888 case PERF_RECORD_HEADER_BUILD_ID:
889 return tool->build_id(tool, event, session);
890 case PERF_RECORD_FINISHED_ROUND:
891 return tool->finished_round(tool, event, session);
892 default:
893 return -EINVAL;
894 }
895 }
896
897 static void event_swap(union perf_event *event, bool sample_id_all)
898 {
899 perf_event__swap_op swap;
900
901 swap = perf_event__swap_ops[event->header.type];
902 if (swap)
903 swap(event, sample_id_all);
904 }
905
906 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
907 void *buf, size_t buf_sz,
908 union perf_event **event_ptr,
909 struct perf_sample *sample)
910 {
911 union perf_event *event;
912 size_t hdr_sz, rest;
913 int fd;
914
915 if (session->one_mmap && !session->header.needs_swap) {
916 event = file_offset - session->one_mmap_offset +
917 session->one_mmap_addr;
918 goto out_parse_sample;
919 }
920
921 if (perf_data_file__is_pipe(session->file))
922 return -1;
923
924 fd = perf_data_file__fd(session->file);
925 hdr_sz = sizeof(struct perf_event_header);
926
927 if (buf_sz < hdr_sz)
928 return -1;
929
930 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
931 readn(fd, &buf, hdr_sz) != (ssize_t)hdr_sz)
932 return -1;
933
934 event = (union perf_event *)buf;
935
936 if (session->header.needs_swap)
937 perf_event_header__bswap(&event->header);
938
939 if (event->header.size < hdr_sz)
940 return -1;
941
942 rest = event->header.size - hdr_sz;
943
944 if (readn(fd, &buf, rest) != (ssize_t)rest)
945 return -1;
946
947 if (session->header.needs_swap)
948 event_swap(event, perf_evlist__sample_id_all(session->evlist));
949
950 out_parse_sample:
951
952 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
953 perf_evlist__parse_sample(session->evlist, event, sample))
954 return -1;
955
956 *event_ptr = event;
957
958 return 0;
959 }
960
961 static s64 perf_session__process_event(struct perf_session *session,
962 union perf_event *event,
963 struct perf_tool *tool,
964 u64 file_offset)
965 {
966 struct perf_sample sample;
967 int ret;
968
969 if (session->header.needs_swap)
970 event_swap(event, perf_evlist__sample_id_all(session->evlist));
971
972 if (event->header.type >= PERF_RECORD_HEADER_MAX)
973 return -EINVAL;
974
975 events_stats__inc(&session->stats, event->header.type);
976
977 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
978 return perf_session__process_user_event(session, event, tool, file_offset);
979
980 /*
981 * For all kernel events we get the sample data
982 */
983 ret = perf_evlist__parse_sample(session->evlist, event, &sample);
984 if (ret)
985 return ret;
986
987 if (tool->ordered_events) {
988 ret = perf_session_queue_event(session, event, tool, &sample,
989 file_offset);
990 if (ret != -ETIME)
991 return ret;
992 }
993
994 return perf_session__deliver_event(session, event, &sample, tool,
995 file_offset);
996 }
997
998 void perf_event_header__bswap(struct perf_event_header *hdr)
999 {
1000 hdr->type = bswap_32(hdr->type);
1001 hdr->misc = bswap_16(hdr->misc);
1002 hdr->size = bswap_16(hdr->size);
1003 }
1004
1005 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1006 {
1007 return machine__findnew_thread(&session->machines.host, -1, pid);
1008 }
1009
1010 static struct thread *perf_session__register_idle_thread(struct perf_session *session)
1011 {
1012 struct thread *thread;
1013
1014 thread = machine__findnew_thread(&session->machines.host, 0, 0);
1015 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1016 pr_err("problem inserting idle task.\n");
1017 thread = NULL;
1018 }
1019
1020 return thread;
1021 }
1022
1023 static void perf_session__warn_about_errors(const struct perf_session *session,
1024 const struct perf_tool *tool)
1025 {
1026 if (tool->lost == perf_event__process_lost &&
1027 session->stats.nr_events[PERF_RECORD_LOST] != 0) {
1028 ui__warning("Processed %d events and lost %d chunks!\n\n"
1029 "Check IO/CPU overload!\n\n",
1030 session->stats.nr_events[0],
1031 session->stats.nr_events[PERF_RECORD_LOST]);
1032 }
1033
1034 if (session->stats.nr_unknown_events != 0) {
1035 ui__warning("Found %u unknown events!\n\n"
1036 "Is this an older tool processing a perf.data "
1037 "file generated by a more recent tool?\n\n"
1038 "If that is not the case, consider "
1039 "reporting to linux-kernel@vger.kernel.org.\n\n",
1040 session->stats.nr_unknown_events);
1041 }
1042
1043 if (session->stats.nr_unknown_id != 0) {
1044 ui__warning("%u samples with id not present in the header\n",
1045 session->stats.nr_unknown_id);
1046 }
1047
1048 if (session->stats.nr_invalid_chains != 0) {
1049 ui__warning("Found invalid callchains!\n\n"
1050 "%u out of %u events were discarded for this reason.\n\n"
1051 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1052 session->stats.nr_invalid_chains,
1053 session->stats.nr_events[PERF_RECORD_SAMPLE]);
1054 }
1055
1056 if (session->stats.nr_unprocessable_samples != 0) {
1057 ui__warning("%u unprocessable samples recorded.\n"
1058 "Do you have a KVM guest running and not using 'perf kvm'?\n",
1059 session->stats.nr_unprocessable_samples);
1060 }
1061 }
1062
1063 volatile int session_done;
1064
1065 static int __perf_session__process_pipe_events(struct perf_session *session,
1066 struct perf_tool *tool)
1067 {
1068 int fd = perf_data_file__fd(session->file);
1069 union perf_event *event;
1070 uint32_t size, cur_size = 0;
1071 void *buf = NULL;
1072 s64 skip = 0;
1073 u64 head;
1074 ssize_t err;
1075 void *p;
1076
1077 perf_tool__fill_defaults(tool);
1078
1079 head = 0;
1080 cur_size = sizeof(union perf_event);
1081
1082 buf = malloc(cur_size);
1083 if (!buf)
1084 return -errno;
1085 more:
1086 event = buf;
1087 err = readn(fd, event, sizeof(struct perf_event_header));
1088 if (err <= 0) {
1089 if (err == 0)
1090 goto done;
1091
1092 pr_err("failed to read event header\n");
1093 goto out_err;
1094 }
1095
1096 if (session->header.needs_swap)
1097 perf_event_header__bswap(&event->header);
1098
1099 size = event->header.size;
1100 if (size < sizeof(struct perf_event_header)) {
1101 pr_err("bad event header size\n");
1102 goto out_err;
1103 }
1104
1105 if (size > cur_size) {
1106 void *new = realloc(buf, size);
1107 if (!new) {
1108 pr_err("failed to allocate memory to read event\n");
1109 goto out_err;
1110 }
1111 buf = new;
1112 cur_size = size;
1113 event = buf;
1114 }
1115 p = event;
1116 p += sizeof(struct perf_event_header);
1117
1118 if (size - sizeof(struct perf_event_header)) {
1119 err = readn(fd, p, size - sizeof(struct perf_event_header));
1120 if (err <= 0) {
1121 if (err == 0) {
1122 pr_err("unexpected end of event stream\n");
1123 goto done;
1124 }
1125
1126 pr_err("failed to read event data\n");
1127 goto out_err;
1128 }
1129 }
1130
1131 if ((skip = perf_session__process_event(session, event, tool, head)) < 0) {
1132 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1133 head, event->header.size, event->header.type);
1134 err = -EINVAL;
1135 goto out_err;
1136 }
1137
1138 head += size;
1139
1140 if (skip > 0)
1141 head += skip;
1142
1143 if (!session_done())
1144 goto more;
1145 done:
1146 /* do the final flush for ordered samples */
1147 err = ordered_events__flush(session, tool, OE_FLUSH__FINAL);
1148 out_err:
1149 free(buf);
1150 perf_session__warn_about_errors(session, tool);
1151 ordered_events__free(&session->ordered_events);
1152 return err;
1153 }
1154
1155 static union perf_event *
1156 fetch_mmaped_event(struct perf_session *session,
1157 u64 head, size_t mmap_size, char *buf)
1158 {
1159 union perf_event *event;
1160
1161 /*
1162 * Ensure we have enough space remaining to read
1163 * the size of the event in the headers.
1164 */
1165 if (head + sizeof(event->header) > mmap_size)
1166 return NULL;
1167
1168 event = (union perf_event *)(buf + head);
1169
1170 if (session->header.needs_swap)
1171 perf_event_header__bswap(&event->header);
1172
1173 if (head + event->header.size > mmap_size) {
1174 /* We're not fetching the event so swap back again */
1175 if (session->header.needs_swap)
1176 perf_event_header__bswap(&event->header);
1177 return NULL;
1178 }
1179
1180 return event;
1181 }
1182
1183 /*
1184 * On 64bit we can mmap the data file in one go. No need for tiny mmap
1185 * slices. On 32bit we use 32MB.
1186 */
1187 #if BITS_PER_LONG == 64
1188 #define MMAP_SIZE ULLONG_MAX
1189 #define NUM_MMAPS 1
1190 #else
1191 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1192 #define NUM_MMAPS 128
1193 #endif
1194
1195 int __perf_session__process_events(struct perf_session *session,
1196 u64 data_offset, u64 data_size,
1197 u64 file_size, struct perf_tool *tool)
1198 {
1199 int fd = perf_data_file__fd(session->file);
1200 u64 head, page_offset, file_offset, file_pos, size;
1201 int err, mmap_prot, mmap_flags, map_idx = 0;
1202 size_t mmap_size;
1203 char *buf, *mmaps[NUM_MMAPS];
1204 union perf_event *event;
1205 struct ui_progress prog;
1206 s64 skip;
1207
1208 perf_tool__fill_defaults(tool);
1209
1210 page_offset = page_size * (data_offset / page_size);
1211 file_offset = page_offset;
1212 head = data_offset - page_offset;
1213
1214 if (data_size && (data_offset + data_size < file_size))
1215 file_size = data_offset + data_size;
1216
1217 ui_progress__init(&prog, file_size, "Processing events...");
1218
1219 mmap_size = MMAP_SIZE;
1220 if (mmap_size > file_size) {
1221 mmap_size = file_size;
1222 session->one_mmap = true;
1223 }
1224
1225 memset(mmaps, 0, sizeof(mmaps));
1226
1227 mmap_prot = PROT_READ;
1228 mmap_flags = MAP_SHARED;
1229
1230 if (session->header.needs_swap) {
1231 mmap_prot |= PROT_WRITE;
1232 mmap_flags = MAP_PRIVATE;
1233 }
1234 remap:
1235 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1236 file_offset);
1237 if (buf == MAP_FAILED) {
1238 pr_err("failed to mmap file\n");
1239 err = -errno;
1240 goto out_err;
1241 }
1242 mmaps[map_idx] = buf;
1243 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1244 file_pos = file_offset + head;
1245 if (session->one_mmap) {
1246 session->one_mmap_addr = buf;
1247 session->one_mmap_offset = file_offset;
1248 }
1249
1250 more:
1251 event = fetch_mmaped_event(session, head, mmap_size, buf);
1252 if (!event) {
1253 if (mmaps[map_idx]) {
1254 munmap(mmaps[map_idx], mmap_size);
1255 mmaps[map_idx] = NULL;
1256 }
1257
1258 page_offset = page_size * (head / page_size);
1259 file_offset += page_offset;
1260 head -= page_offset;
1261 goto remap;
1262 }
1263
1264 size = event->header.size;
1265
1266 if (size < sizeof(struct perf_event_header) ||
1267 (skip = perf_session__process_event(session, event, tool, file_pos))
1268 < 0) {
1269 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1270 file_offset + head, event->header.size,
1271 event->header.type);
1272 err = -EINVAL;
1273 goto out_err;
1274 }
1275
1276 if (skip)
1277 size += skip;
1278
1279 head += size;
1280 file_pos += size;
1281
1282 ui_progress__update(&prog, size);
1283
1284 if (session_done())
1285 goto out;
1286
1287 if (file_pos < file_size)
1288 goto more;
1289
1290 out:
1291 /* do the final flush for ordered samples */
1292 err = ordered_events__flush(session, tool, OE_FLUSH__FINAL);
1293 out_err:
1294 ui_progress__finish();
1295 perf_session__warn_about_errors(session, tool);
1296 ordered_events__free(&session->ordered_events);
1297 session->one_mmap = false;
1298 return err;
1299 }
1300
1301 int perf_session__process_events(struct perf_session *session,
1302 struct perf_tool *tool)
1303 {
1304 u64 size = perf_data_file__size(session->file);
1305 int err;
1306
1307 if (perf_session__register_idle_thread(session) == NULL)
1308 return -ENOMEM;
1309
1310 if (!perf_data_file__is_pipe(session->file))
1311 err = __perf_session__process_events(session,
1312 session->header.data_offset,
1313 session->header.data_size,
1314 size, tool);
1315 else
1316 err = __perf_session__process_pipe_events(session, tool);
1317
1318 return err;
1319 }
1320
1321 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1322 {
1323 struct perf_evsel *evsel;
1324
1325 evlist__for_each(session->evlist, evsel) {
1326 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1327 return true;
1328 }
1329
1330 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1331 return false;
1332 }
1333
1334 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1335 const char *symbol_name, u64 addr)
1336 {
1337 char *bracket;
1338 enum map_type i;
1339 struct ref_reloc_sym *ref;
1340
1341 ref = zalloc(sizeof(struct ref_reloc_sym));
1342 if (ref == NULL)
1343 return -ENOMEM;
1344
1345 ref->name = strdup(symbol_name);
1346 if (ref->name == NULL) {
1347 free(ref);
1348 return -ENOMEM;
1349 }
1350
1351 bracket = strchr(ref->name, ']');
1352 if (bracket)
1353 *bracket = '\0';
1354
1355 ref->addr = addr;
1356
1357 for (i = 0; i < MAP__NR_TYPES; ++i) {
1358 struct kmap *kmap = map__kmap(maps[i]);
1359 kmap->ref_reloc_sym = ref;
1360 }
1361
1362 return 0;
1363 }
1364
1365 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
1366 {
1367 return machines__fprintf_dsos(&session->machines, fp);
1368 }
1369
1370 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
1371 bool (skip)(struct dso *dso, int parm), int parm)
1372 {
1373 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
1374 }
1375
1376 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1377 {
1378 struct perf_evsel *pos;
1379 size_t ret = fprintf(fp, "Aggregated stats:\n");
1380
1381 ret += events_stats__fprintf(&session->stats, fp);
1382
1383 evlist__for_each(session->evlist, pos) {
1384 ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos));
1385 ret += events_stats__fprintf(&evsel__hists(pos)->stats, fp);
1386 }
1387
1388 return ret;
1389 }
1390
1391 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1392 {
1393 /*
1394 * FIXME: Here we have to actually print all the machines in this
1395 * session, not just the host...
1396 */
1397 return machine__fprintf(&session->machines.host, fp);
1398 }
1399
1400 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1401 unsigned int type)
1402 {
1403 struct perf_evsel *pos;
1404
1405 evlist__for_each(session->evlist, pos) {
1406 if (pos->attr.type == type)
1407 return pos;
1408 }
1409 return NULL;
1410 }
1411
1412 void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample,
1413 struct addr_location *al,
1414 unsigned int print_opts, unsigned int stack_depth)
1415 {
1416 struct callchain_cursor_node *node;
1417 int print_ip = print_opts & PRINT_IP_OPT_IP;
1418 int print_sym = print_opts & PRINT_IP_OPT_SYM;
1419 int print_dso = print_opts & PRINT_IP_OPT_DSO;
1420 int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET;
1421 int print_oneline = print_opts & PRINT_IP_OPT_ONELINE;
1422 int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE;
1423 char s = print_oneline ? ' ' : '\t';
1424
1425 if (symbol_conf.use_callchain && sample->callchain) {
1426 struct addr_location node_al;
1427
1428 if (machine__resolve_callchain(al->machine, evsel, al->thread,
1429 sample, NULL, NULL,
1430 PERF_MAX_STACK_DEPTH) != 0) {
1431 if (verbose)
1432 error("Failed to resolve callchain. Skipping\n");
1433 return;
1434 }
1435 callchain_cursor_commit(&callchain_cursor);
1436
1437 if (print_symoffset)
1438 node_al = *al;
1439
1440 while (stack_depth) {
1441 u64 addr = 0;
1442
1443 node = callchain_cursor_current(&callchain_cursor);
1444 if (!node)
1445 break;
1446
1447 if (node->sym && node->sym->ignore)
1448 goto next;
1449
1450 if (print_ip)
1451 printf("%c%16" PRIx64, s, node->ip);
1452
1453 if (node->map)
1454 addr = node->map->map_ip(node->map, node->ip);
1455
1456 if (print_sym) {
1457 printf(" ");
1458 if (print_symoffset) {
1459 node_al.addr = addr;
1460 node_al.map = node->map;
1461 symbol__fprintf_symname_offs(node->sym, &node_al, stdout);
1462 } else
1463 symbol__fprintf_symname(node->sym, stdout);
1464 }
1465
1466 if (print_dso) {
1467 printf(" (");
1468 map__fprintf_dsoname(node->map, stdout);
1469 printf(")");
1470 }
1471
1472 if (print_srcline)
1473 map__fprintf_srcline(node->map, addr, "\n ",
1474 stdout);
1475
1476 if (!print_oneline)
1477 printf("\n");
1478
1479 stack_depth--;
1480 next:
1481 callchain_cursor_advance(&callchain_cursor);
1482 }
1483
1484 } else {
1485 if (al->sym && al->sym->ignore)
1486 return;
1487
1488 if (print_ip)
1489 printf("%16" PRIx64, sample->ip);
1490
1491 if (print_sym) {
1492 printf(" ");
1493 if (print_symoffset)
1494 symbol__fprintf_symname_offs(al->sym, al,
1495 stdout);
1496 else
1497 symbol__fprintf_symname(al->sym, stdout);
1498 }
1499
1500 if (print_dso) {
1501 printf(" (");
1502 map__fprintf_dsoname(al->map, stdout);
1503 printf(")");
1504 }
1505
1506 if (print_srcline)
1507 map__fprintf_srcline(al->map, al->addr, "\n ", stdout);
1508 }
1509 }
1510
1511 int perf_session__cpu_bitmap(struct perf_session *session,
1512 const char *cpu_list, unsigned long *cpu_bitmap)
1513 {
1514 int i, err = -1;
1515 struct cpu_map *map;
1516
1517 for (i = 0; i < PERF_TYPE_MAX; ++i) {
1518 struct perf_evsel *evsel;
1519
1520 evsel = perf_session__find_first_evtype(session, i);
1521 if (!evsel)
1522 continue;
1523
1524 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
1525 pr_err("File does not contain CPU events. "
1526 "Remove -c option to proceed.\n");
1527 return -1;
1528 }
1529 }
1530
1531 map = cpu_map__new(cpu_list);
1532 if (map == NULL) {
1533 pr_err("Invalid cpu_list\n");
1534 return -1;
1535 }
1536
1537 for (i = 0; i < map->nr; i++) {
1538 int cpu = map->map[i];
1539
1540 if (cpu >= MAX_NR_CPUS) {
1541 pr_err("Requested CPU %d too large. "
1542 "Consider raising MAX_NR_CPUS\n", cpu);
1543 goto out_delete_map;
1544 }
1545
1546 set_bit(cpu, cpu_bitmap);
1547 }
1548
1549 err = 0;
1550
1551 out_delete_map:
1552 cpu_map__delete(map);
1553 return err;
1554 }
1555
1556 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
1557 bool full)
1558 {
1559 struct stat st;
1560 int fd, ret;
1561
1562 if (session == NULL || fp == NULL)
1563 return;
1564
1565 fd = perf_data_file__fd(session->file);
1566
1567 ret = fstat(fd, &st);
1568 if (ret == -1)
1569 return;
1570
1571 fprintf(fp, "# ========\n");
1572 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
1573 perf_header__fprintf_info(session, fp, full);
1574 fprintf(fp, "# ========\n#\n");
1575 }
1576
1577
1578 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
1579 const struct perf_evsel_str_handler *assocs,
1580 size_t nr_assocs)
1581 {
1582 struct perf_evsel *evsel;
1583 size_t i;
1584 int err;
1585
1586 for (i = 0; i < nr_assocs; i++) {
1587 /*
1588 * Adding a handler for an event not in the session,
1589 * just ignore it.
1590 */
1591 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
1592 if (evsel == NULL)
1593 continue;
1594
1595 err = -EEXIST;
1596 if (evsel->handler != NULL)
1597 goto out;
1598 evsel->handler = assocs[i].handler;
1599 }
1600
1601 err = 0;
1602 out:
1603 return err;
1604 }
Linux kernel - Deliverables
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