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