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dvb_frontend: don't use-after-free the frontend struct
[mirror_ubuntu-bionic-kernel.git] / tools / perf / util / session.c
1 #include <errno.h>
2 #include <inttypes.h>
3 #include <linux/kernel.h>
4 #include <traceevent/event-parse.h>
5 #include <api/fs/fs.h>
6
7 #include <byteswap.h>
8 #include <unistd.h>
9 #include <sys/types.h>
10 #include <sys/mman.h>
11
12 #include "evlist.h"
13 #include "evsel.h"
14 #include "memswap.h"
15 #include "session.h"
16 #include "tool.h"
17 #include "sort.h"
18 #include "util.h"
19 #include "cpumap.h"
20 #include "perf_regs.h"
21 #include "asm/bug.h"
22 #include "auxtrace.h"
23 #include "thread.h"
24 #include "thread-stack.h"
25 #include "stat.h"
26
27 static int perf_session__deliver_event(struct perf_session *session,
28 union perf_event *event,
29 struct perf_sample *sample,
30 struct perf_tool *tool,
31 u64 file_offset);
32
33 static int perf_session__open(struct perf_session *session)
34 {
35 struct perf_data_file *file = session->file;
36
37 if (perf_session__read_header(session) < 0) {
38 pr_err("incompatible file format (rerun with -v to learn more)\n");
39 return -1;
40 }
41
42 if (perf_data_file__is_pipe(file))
43 return 0;
44
45 if (perf_header__has_feat(&session->header, HEADER_STAT))
46 return 0;
47
48 if (!perf_evlist__valid_sample_type(session->evlist)) {
49 pr_err("non matching sample_type\n");
50 return -1;
51 }
52
53 if (!perf_evlist__valid_sample_id_all(session->evlist)) {
54 pr_err("non matching sample_id_all\n");
55 return -1;
56 }
57
58 if (!perf_evlist__valid_read_format(session->evlist)) {
59 pr_err("non matching read_format\n");
60 return -1;
61 }
62
63 return 0;
64 }
65
66 void perf_session__set_id_hdr_size(struct perf_session *session)
67 {
68 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
69
70 machines__set_id_hdr_size(&session->machines, id_hdr_size);
71 }
72
73 int perf_session__create_kernel_maps(struct perf_session *session)
74 {
75 int ret = machine__create_kernel_maps(&session->machines.host);
76
77 if (ret >= 0)
78 ret = machines__create_guest_kernel_maps(&session->machines);
79 return ret;
80 }
81
82 static void perf_session__destroy_kernel_maps(struct perf_session *session)
83 {
84 machines__destroy_kernel_maps(&session->machines);
85 }
86
87 static bool perf_session__has_comm_exec(struct perf_session *session)
88 {
89 struct perf_evsel *evsel;
90
91 evlist__for_each_entry(session->evlist, evsel) {
92 if (evsel->attr.comm_exec)
93 return true;
94 }
95
96 return false;
97 }
98
99 static void perf_session__set_comm_exec(struct perf_session *session)
100 {
101 bool comm_exec = perf_session__has_comm_exec(session);
102
103 machines__set_comm_exec(&session->machines, comm_exec);
104 }
105
106 static int ordered_events__deliver_event(struct ordered_events *oe,
107 struct ordered_event *event)
108 {
109 struct perf_sample sample;
110 struct perf_session *session = container_of(oe, struct perf_session,
111 ordered_events);
112 int ret = perf_evlist__parse_sample(session->evlist, event->event, &sample);
113
114 if (ret) {
115 pr_err("Can't parse sample, err = %d\n", ret);
116 return ret;
117 }
118
119 return perf_session__deliver_event(session, event->event, &sample,
120 session->tool, event->file_offset);
121 }
122
123 struct perf_session *perf_session__new(struct perf_data_file *file,
124 bool repipe, struct perf_tool *tool)
125 {
126 struct perf_session *session = zalloc(sizeof(*session));
127
128 if (!session)
129 goto out;
130
131 session->repipe = repipe;
132 session->tool = tool;
133 INIT_LIST_HEAD(&session->auxtrace_index);
134 machines__init(&session->machines);
135 ordered_events__init(&session->ordered_events, ordered_events__deliver_event);
136
137 if (file) {
138 if (perf_data_file__open(file))
139 goto out_delete;
140
141 session->file = file;
142
143 if (perf_data_file__is_read(file)) {
144 if (perf_session__open(session) < 0)
145 goto out_close;
146
147 /*
148 * set session attributes that are present in perf.data
149 * but not in pipe-mode.
150 */
151 if (!file->is_pipe) {
152 perf_session__set_id_hdr_size(session);
153 perf_session__set_comm_exec(session);
154 }
155 }
156 } else {
157 session->machines.host.env = &perf_env;
158 }
159
160 if (!file || perf_data_file__is_write(file)) {
161 /*
162 * In O_RDONLY mode this will be performed when reading the
163 * kernel MMAP event, in perf_event__process_mmap().
164 */
165 if (perf_session__create_kernel_maps(session) < 0)
166 pr_warning("Cannot read kernel map\n");
167 }
168
169 /*
170 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is
171 * processed, so perf_evlist__sample_id_all is not meaningful here.
172 */
173 if ((!file || !file->is_pipe) && tool && tool->ordering_requires_timestamps &&
174 tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) {
175 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
176 tool->ordered_events = false;
177 }
178
179 return session;
180
181 out_close:
182 perf_data_file__close(file);
183 out_delete:
184 perf_session__delete(session);
185 out:
186 return NULL;
187 }
188
189 static void perf_session__delete_threads(struct perf_session *session)
190 {
191 machine__delete_threads(&session->machines.host);
192 }
193
194 void perf_session__delete(struct perf_session *session)
195 {
196 if (session == NULL)
197 return;
198 auxtrace__free(session);
199 auxtrace_index__free(&session->auxtrace_index);
200 perf_session__destroy_kernel_maps(session);
201 perf_session__delete_threads(session);
202 perf_env__exit(&session->header.env);
203 machines__exit(&session->machines);
204 if (session->file)
205 perf_data_file__close(session->file);
206 free(session);
207 }
208
209 static int process_event_synth_tracing_data_stub(struct perf_tool *tool
210 __maybe_unused,
211 union perf_event *event
212 __maybe_unused,
213 struct perf_session *session
214 __maybe_unused)
215 {
216 dump_printf(": unhandled!\n");
217 return 0;
218 }
219
220 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
221 union perf_event *event __maybe_unused,
222 struct perf_evlist **pevlist
223 __maybe_unused)
224 {
225 dump_printf(": unhandled!\n");
226 return 0;
227 }
228
229 static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused,
230 union perf_event *event __maybe_unused,
231 struct perf_evlist **pevlist
232 __maybe_unused)
233 {
234 if (dump_trace)
235 perf_event__fprintf_event_update(event, stdout);
236
237 dump_printf(": unhandled!\n");
238 return 0;
239 }
240
241 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
242 union perf_event *event __maybe_unused,
243 struct perf_sample *sample __maybe_unused,
244 struct perf_evsel *evsel __maybe_unused,
245 struct machine *machine __maybe_unused)
246 {
247 dump_printf(": unhandled!\n");
248 return 0;
249 }
250
251 static int process_event_stub(struct perf_tool *tool __maybe_unused,
252 union perf_event *event __maybe_unused,
253 struct perf_sample *sample __maybe_unused,
254 struct machine *machine __maybe_unused)
255 {
256 dump_printf(": unhandled!\n");
257 return 0;
258 }
259
260 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
261 union perf_event *event __maybe_unused,
262 struct ordered_events *oe __maybe_unused)
263 {
264 dump_printf(": unhandled!\n");
265 return 0;
266 }
267
268 static int process_finished_round(struct perf_tool *tool,
269 union perf_event *event,
270 struct ordered_events *oe);
271
272 static int skipn(int fd, off_t n)
273 {
274 char buf[4096];
275 ssize_t ret;
276
277 while (n > 0) {
278 ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
279 if (ret <= 0)
280 return ret;
281 n -= ret;
282 }
283
284 return 0;
285 }
286
287 static s64 process_event_auxtrace_stub(struct perf_tool *tool __maybe_unused,
288 union perf_event *event,
289 struct perf_session *session
290 __maybe_unused)
291 {
292 dump_printf(": unhandled!\n");
293 if (perf_data_file__is_pipe(session->file))
294 skipn(perf_data_file__fd(session->file), event->auxtrace.size);
295 return event->auxtrace.size;
296 }
297
298 static int process_event_op2_stub(struct perf_tool *tool __maybe_unused,
299 union perf_event *event __maybe_unused,
300 struct perf_session *session __maybe_unused)
301 {
302 dump_printf(": unhandled!\n");
303 return 0;
304 }
305
306
307 static
308 int process_event_thread_map_stub(struct perf_tool *tool __maybe_unused,
309 union perf_event *event __maybe_unused,
310 struct perf_session *session __maybe_unused)
311 {
312 if (dump_trace)
313 perf_event__fprintf_thread_map(event, stdout);
314
315 dump_printf(": unhandled!\n");
316 return 0;
317 }
318
319 static
320 int process_event_cpu_map_stub(struct perf_tool *tool __maybe_unused,
321 union perf_event *event __maybe_unused,
322 struct perf_session *session __maybe_unused)
323 {
324 if (dump_trace)
325 perf_event__fprintf_cpu_map(event, stdout);
326
327 dump_printf(": unhandled!\n");
328 return 0;
329 }
330
331 static
332 int process_event_stat_config_stub(struct perf_tool *tool __maybe_unused,
333 union perf_event *event __maybe_unused,
334 struct perf_session *session __maybe_unused)
335 {
336 if (dump_trace)
337 perf_event__fprintf_stat_config(event, stdout);
338
339 dump_printf(": unhandled!\n");
340 return 0;
341 }
342
343 static int process_stat_stub(struct perf_tool *tool __maybe_unused,
344 union perf_event *event __maybe_unused,
345 struct perf_session *perf_session
346 __maybe_unused)
347 {
348 if (dump_trace)
349 perf_event__fprintf_stat(event, stdout);
350
351 dump_printf(": unhandled!\n");
352 return 0;
353 }
354
355 static int process_stat_round_stub(struct perf_tool *tool __maybe_unused,
356 union perf_event *event __maybe_unused,
357 struct perf_session *perf_session
358 __maybe_unused)
359 {
360 if (dump_trace)
361 perf_event__fprintf_stat_round(event, stdout);
362
363 dump_printf(": unhandled!\n");
364 return 0;
365 }
366
367 void perf_tool__fill_defaults(struct perf_tool *tool)
368 {
369 if (tool->sample == NULL)
370 tool->sample = process_event_sample_stub;
371 if (tool->mmap == NULL)
372 tool->mmap = process_event_stub;
373 if (tool->mmap2 == NULL)
374 tool->mmap2 = process_event_stub;
375 if (tool->comm == NULL)
376 tool->comm = process_event_stub;
377 if (tool->fork == NULL)
378 tool->fork = process_event_stub;
379 if (tool->exit == NULL)
380 tool->exit = process_event_stub;
381 if (tool->lost == NULL)
382 tool->lost = perf_event__process_lost;
383 if (tool->lost_samples == NULL)
384 tool->lost_samples = perf_event__process_lost_samples;
385 if (tool->aux == NULL)
386 tool->aux = perf_event__process_aux;
387 if (tool->itrace_start == NULL)
388 tool->itrace_start = perf_event__process_itrace_start;
389 if (tool->context_switch == NULL)
390 tool->context_switch = perf_event__process_switch;
391 if (tool->read == NULL)
392 tool->read = process_event_sample_stub;
393 if (tool->throttle == NULL)
394 tool->throttle = process_event_stub;
395 if (tool->unthrottle == NULL)
396 tool->unthrottle = process_event_stub;
397 if (tool->attr == NULL)
398 tool->attr = process_event_synth_attr_stub;
399 if (tool->event_update == NULL)
400 tool->event_update = process_event_synth_event_update_stub;
401 if (tool->tracing_data == NULL)
402 tool->tracing_data = process_event_synth_tracing_data_stub;
403 if (tool->build_id == NULL)
404 tool->build_id = process_event_op2_stub;
405 if (tool->finished_round == NULL) {
406 if (tool->ordered_events)
407 tool->finished_round = process_finished_round;
408 else
409 tool->finished_round = process_finished_round_stub;
410 }
411 if (tool->id_index == NULL)
412 tool->id_index = process_event_op2_stub;
413 if (tool->auxtrace_info == NULL)
414 tool->auxtrace_info = process_event_op2_stub;
415 if (tool->auxtrace == NULL)
416 tool->auxtrace = process_event_auxtrace_stub;
417 if (tool->auxtrace_error == NULL)
418 tool->auxtrace_error = process_event_op2_stub;
419 if (tool->thread_map == NULL)
420 tool->thread_map = process_event_thread_map_stub;
421 if (tool->cpu_map == NULL)
422 tool->cpu_map = process_event_cpu_map_stub;
423 if (tool->stat_config == NULL)
424 tool->stat_config = process_event_stat_config_stub;
425 if (tool->stat == NULL)
426 tool->stat = process_stat_stub;
427 if (tool->stat_round == NULL)
428 tool->stat_round = process_stat_round_stub;
429 if (tool->time_conv == NULL)
430 tool->time_conv = process_event_op2_stub;
431 if (tool->feature == NULL)
432 tool->feature = process_event_op2_stub;
433 }
434
435 static void swap_sample_id_all(union perf_event *event, void *data)
436 {
437 void *end = (void *) event + event->header.size;
438 int size = end - data;
439
440 BUG_ON(size % sizeof(u64));
441 mem_bswap_64(data, size);
442 }
443
444 static void perf_event__all64_swap(union perf_event *event,
445 bool sample_id_all __maybe_unused)
446 {
447 struct perf_event_header *hdr = &event->header;
448 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
449 }
450
451 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
452 {
453 event->comm.pid = bswap_32(event->comm.pid);
454 event->comm.tid = bswap_32(event->comm.tid);
455
456 if (sample_id_all) {
457 void *data = &event->comm.comm;
458
459 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
460 swap_sample_id_all(event, data);
461 }
462 }
463
464 static void perf_event__mmap_swap(union perf_event *event,
465 bool sample_id_all)
466 {
467 event->mmap.pid = bswap_32(event->mmap.pid);
468 event->mmap.tid = bswap_32(event->mmap.tid);
469 event->mmap.start = bswap_64(event->mmap.start);
470 event->mmap.len = bswap_64(event->mmap.len);
471 event->mmap.pgoff = bswap_64(event->mmap.pgoff);
472
473 if (sample_id_all) {
474 void *data = &event->mmap.filename;
475
476 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
477 swap_sample_id_all(event, data);
478 }
479 }
480
481 static void perf_event__mmap2_swap(union perf_event *event,
482 bool sample_id_all)
483 {
484 event->mmap2.pid = bswap_32(event->mmap2.pid);
485 event->mmap2.tid = bswap_32(event->mmap2.tid);
486 event->mmap2.start = bswap_64(event->mmap2.start);
487 event->mmap2.len = bswap_64(event->mmap2.len);
488 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
489 event->mmap2.maj = bswap_32(event->mmap2.maj);
490 event->mmap2.min = bswap_32(event->mmap2.min);
491 event->mmap2.ino = bswap_64(event->mmap2.ino);
492
493 if (sample_id_all) {
494 void *data = &event->mmap2.filename;
495
496 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
497 swap_sample_id_all(event, data);
498 }
499 }
500 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
501 {
502 event->fork.pid = bswap_32(event->fork.pid);
503 event->fork.tid = bswap_32(event->fork.tid);
504 event->fork.ppid = bswap_32(event->fork.ppid);
505 event->fork.ptid = bswap_32(event->fork.ptid);
506 event->fork.time = bswap_64(event->fork.time);
507
508 if (sample_id_all)
509 swap_sample_id_all(event, &event->fork + 1);
510 }
511
512 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
513 {
514 event->read.pid = bswap_32(event->read.pid);
515 event->read.tid = bswap_32(event->read.tid);
516 event->read.value = bswap_64(event->read.value);
517 event->read.time_enabled = bswap_64(event->read.time_enabled);
518 event->read.time_running = bswap_64(event->read.time_running);
519 event->read.id = bswap_64(event->read.id);
520
521 if (sample_id_all)
522 swap_sample_id_all(event, &event->read + 1);
523 }
524
525 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
526 {
527 event->aux.aux_offset = bswap_64(event->aux.aux_offset);
528 event->aux.aux_size = bswap_64(event->aux.aux_size);
529 event->aux.flags = bswap_64(event->aux.flags);
530
531 if (sample_id_all)
532 swap_sample_id_all(event, &event->aux + 1);
533 }
534
535 static void perf_event__itrace_start_swap(union perf_event *event,
536 bool sample_id_all)
537 {
538 event->itrace_start.pid = bswap_32(event->itrace_start.pid);
539 event->itrace_start.tid = bswap_32(event->itrace_start.tid);
540
541 if (sample_id_all)
542 swap_sample_id_all(event, &event->itrace_start + 1);
543 }
544
545 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
546 {
547 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
548 event->context_switch.next_prev_pid =
549 bswap_32(event->context_switch.next_prev_pid);
550 event->context_switch.next_prev_tid =
551 bswap_32(event->context_switch.next_prev_tid);
552 }
553
554 if (sample_id_all)
555 swap_sample_id_all(event, &event->context_switch + 1);
556 }
557
558 static void perf_event__throttle_swap(union perf_event *event,
559 bool sample_id_all)
560 {
561 event->throttle.time = bswap_64(event->throttle.time);
562 event->throttle.id = bswap_64(event->throttle.id);
563 event->throttle.stream_id = bswap_64(event->throttle.stream_id);
564
565 if (sample_id_all)
566 swap_sample_id_all(event, &event->throttle + 1);
567 }
568
569 static u8 revbyte(u8 b)
570 {
571 int rev = (b >> 4) | ((b & 0xf) << 4);
572 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
573 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
574 return (u8) rev;
575 }
576
577 /*
578 * XXX this is hack in attempt to carry flags bitfield
579 * through endian village. ABI says:
580 *
581 * Bit-fields are allocated from right to left (least to most significant)
582 * on little-endian implementations and from left to right (most to least
583 * significant) on big-endian implementations.
584 *
585 * The above seems to be byte specific, so we need to reverse each
586 * byte of the bitfield. 'Internet' also says this might be implementation
587 * specific and we probably need proper fix and carry perf_event_attr
588 * bitfield flags in separate data file FEAT_ section. Thought this seems
589 * to work for now.
590 */
591 static void swap_bitfield(u8 *p, unsigned len)
592 {
593 unsigned i;
594
595 for (i = 0; i < len; i++) {
596 *p = revbyte(*p);
597 p++;
598 }
599 }
600
601 /* exported for swapping attributes in file header */
602 void perf_event__attr_swap(struct perf_event_attr *attr)
603 {
604 attr->type = bswap_32(attr->type);
605 attr->size = bswap_32(attr->size);
606
607 #define bswap_safe(f, n) \
608 (attr->size > (offsetof(struct perf_event_attr, f) + \
609 sizeof(attr->f) * (n)))
610 #define bswap_field(f, sz) \
611 do { \
612 if (bswap_safe(f, 0)) \
613 attr->f = bswap_##sz(attr->f); \
614 } while(0)
615 #define bswap_field_16(f) bswap_field(f, 16)
616 #define bswap_field_32(f) bswap_field(f, 32)
617 #define bswap_field_64(f) bswap_field(f, 64)
618
619 bswap_field_64(config);
620 bswap_field_64(sample_period);
621 bswap_field_64(sample_type);
622 bswap_field_64(read_format);
623 bswap_field_32(wakeup_events);
624 bswap_field_32(bp_type);
625 bswap_field_64(bp_addr);
626 bswap_field_64(bp_len);
627 bswap_field_64(branch_sample_type);
628 bswap_field_64(sample_regs_user);
629 bswap_field_32(sample_stack_user);
630 bswap_field_32(aux_watermark);
631 bswap_field_16(sample_max_stack);
632
633 /*
634 * After read_format are bitfields. Check read_format because
635 * we are unable to use offsetof on bitfield.
636 */
637 if (bswap_safe(read_format, 1))
638 swap_bitfield((u8 *) (&attr->read_format + 1),
639 sizeof(u64));
640 #undef bswap_field_64
641 #undef bswap_field_32
642 #undef bswap_field
643 #undef bswap_safe
644 }
645
646 static void perf_event__hdr_attr_swap(union perf_event *event,
647 bool sample_id_all __maybe_unused)
648 {
649 size_t size;
650
651 perf_event__attr_swap(&event->attr.attr);
652
653 size = event->header.size;
654 size -= (void *)&event->attr.id - (void *)event;
655 mem_bswap_64(event->attr.id, size);
656 }
657
658 static void perf_event__event_update_swap(union perf_event *event,
659 bool sample_id_all __maybe_unused)
660 {
661 event->event_update.type = bswap_64(event->event_update.type);
662 event->event_update.id = bswap_64(event->event_update.id);
663 }
664
665 static void perf_event__event_type_swap(union perf_event *event,
666 bool sample_id_all __maybe_unused)
667 {
668 event->event_type.event_type.event_id =
669 bswap_64(event->event_type.event_type.event_id);
670 }
671
672 static void perf_event__tracing_data_swap(union perf_event *event,
673 bool sample_id_all __maybe_unused)
674 {
675 event->tracing_data.size = bswap_32(event->tracing_data.size);
676 }
677
678 static void perf_event__auxtrace_info_swap(union perf_event *event,
679 bool sample_id_all __maybe_unused)
680 {
681 size_t size;
682
683 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
684
685 size = event->header.size;
686 size -= (void *)&event->auxtrace_info.priv - (void *)event;
687 mem_bswap_64(event->auxtrace_info.priv, size);
688 }
689
690 static void perf_event__auxtrace_swap(union perf_event *event,
691 bool sample_id_all __maybe_unused)
692 {
693 event->auxtrace.size = bswap_64(event->auxtrace.size);
694 event->auxtrace.offset = bswap_64(event->auxtrace.offset);
695 event->auxtrace.reference = bswap_64(event->auxtrace.reference);
696 event->auxtrace.idx = bswap_32(event->auxtrace.idx);
697 event->auxtrace.tid = bswap_32(event->auxtrace.tid);
698 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu);
699 }
700
701 static void perf_event__auxtrace_error_swap(union perf_event *event,
702 bool sample_id_all __maybe_unused)
703 {
704 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
705 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
706 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu);
707 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid);
708 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid);
709 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip);
710 }
711
712 static void perf_event__thread_map_swap(union perf_event *event,
713 bool sample_id_all __maybe_unused)
714 {
715 unsigned i;
716
717 event->thread_map.nr = bswap_64(event->thread_map.nr);
718
719 for (i = 0; i < event->thread_map.nr; i++)
720 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
721 }
722
723 static void perf_event__cpu_map_swap(union perf_event *event,
724 bool sample_id_all __maybe_unused)
725 {
726 struct cpu_map_data *data = &event->cpu_map.data;
727 struct cpu_map_entries *cpus;
728 struct cpu_map_mask *mask;
729 unsigned i;
730
731 data->type = bswap_64(data->type);
732
733 switch (data->type) {
734 case PERF_CPU_MAP__CPUS:
735 cpus = (struct cpu_map_entries *)data->data;
736
737 cpus->nr = bswap_16(cpus->nr);
738
739 for (i = 0; i < cpus->nr; i++)
740 cpus->cpu[i] = bswap_16(cpus->cpu[i]);
741 break;
742 case PERF_CPU_MAP__MASK:
743 mask = (struct cpu_map_mask *) data->data;
744
745 mask->nr = bswap_16(mask->nr);
746 mask->long_size = bswap_16(mask->long_size);
747
748 switch (mask->long_size) {
749 case 4: mem_bswap_32(&mask->mask, mask->nr); break;
750 case 8: mem_bswap_64(&mask->mask, mask->nr); break;
751 default:
752 pr_err("cpu_map swap: unsupported long size\n");
753 }
754 default:
755 break;
756 }
757 }
758
759 static void perf_event__stat_config_swap(union perf_event *event,
760 bool sample_id_all __maybe_unused)
761 {
762 u64 size;
763
764 size = event->stat_config.nr * sizeof(event->stat_config.data[0]);
765 size += 1; /* nr item itself */
766 mem_bswap_64(&event->stat_config.nr, size);
767 }
768
769 static void perf_event__stat_swap(union perf_event *event,
770 bool sample_id_all __maybe_unused)
771 {
772 event->stat.id = bswap_64(event->stat.id);
773 event->stat.thread = bswap_32(event->stat.thread);
774 event->stat.cpu = bswap_32(event->stat.cpu);
775 event->stat.val = bswap_64(event->stat.val);
776 event->stat.ena = bswap_64(event->stat.ena);
777 event->stat.run = bswap_64(event->stat.run);
778 }
779
780 static void perf_event__stat_round_swap(union perf_event *event,
781 bool sample_id_all __maybe_unused)
782 {
783 event->stat_round.type = bswap_64(event->stat_round.type);
784 event->stat_round.time = bswap_64(event->stat_round.time);
785 }
786
787 typedef void (*perf_event__swap_op)(union perf_event *event,
788 bool sample_id_all);
789
790 static perf_event__swap_op perf_event__swap_ops[] = {
791 [PERF_RECORD_MMAP] = perf_event__mmap_swap,
792 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap,
793 [PERF_RECORD_COMM] = perf_event__comm_swap,
794 [PERF_RECORD_FORK] = perf_event__task_swap,
795 [PERF_RECORD_EXIT] = perf_event__task_swap,
796 [PERF_RECORD_LOST] = perf_event__all64_swap,
797 [PERF_RECORD_READ] = perf_event__read_swap,
798 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap,
799 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap,
800 [PERF_RECORD_SAMPLE] = perf_event__all64_swap,
801 [PERF_RECORD_AUX] = perf_event__aux_swap,
802 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap,
803 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap,
804 [PERF_RECORD_SWITCH] = perf_event__switch_swap,
805 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap,
806 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
807 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
808 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
809 [PERF_RECORD_HEADER_BUILD_ID] = NULL,
810 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap,
811 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap,
812 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap,
813 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap,
814 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap,
815 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap,
816 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap,
817 [PERF_RECORD_STAT] = perf_event__stat_swap,
818 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap,
819 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap,
820 [PERF_RECORD_TIME_CONV] = perf_event__all64_swap,
821 [PERF_RECORD_HEADER_MAX] = NULL,
822 };
823
824 /*
825 * When perf record finishes a pass on every buffers, it records this pseudo
826 * event.
827 * We record the max timestamp t found in the pass n.
828 * Assuming these timestamps are monotonic across cpus, we know that if
829 * a buffer still has events with timestamps below t, they will be all
830 * available and then read in the pass n + 1.
831 * Hence when we start to read the pass n + 2, we can safely flush every
832 * events with timestamps below t.
833 *
834 * ============ PASS n =================
835 * CPU 0 | CPU 1
836 * |
837 * cnt1 timestamps | cnt2 timestamps
838 * 1 | 2
839 * 2 | 3
840 * - | 4 <--- max recorded
841 *
842 * ============ PASS n + 1 ==============
843 * CPU 0 | CPU 1
844 * |
845 * cnt1 timestamps | cnt2 timestamps
846 * 3 | 5
847 * 4 | 6
848 * 5 | 7 <---- max recorded
849 *
850 * Flush every events below timestamp 4
851 *
852 * ============ PASS n + 2 ==============
853 * CPU 0 | CPU 1
854 * |
855 * cnt1 timestamps | cnt2 timestamps
856 * 6 | 8
857 * 7 | 9
858 * - | 10
859 *
860 * Flush every events below timestamp 7
861 * etc...
862 */
863 static int process_finished_round(struct perf_tool *tool __maybe_unused,
864 union perf_event *event __maybe_unused,
865 struct ordered_events *oe)
866 {
867 if (dump_trace)
868 fprintf(stdout, "\n");
869 return ordered_events__flush(oe, OE_FLUSH__ROUND);
870 }
871
872 int perf_session__queue_event(struct perf_session *s, union perf_event *event,
873 struct perf_sample *sample, u64 file_offset)
874 {
875 return ordered_events__queue(&s->ordered_events, event, sample, file_offset);
876 }
877
878 static void callchain__lbr_callstack_printf(struct perf_sample *sample)
879 {
880 struct ip_callchain *callchain = sample->callchain;
881 struct branch_stack *lbr_stack = sample->branch_stack;
882 u64 kernel_callchain_nr = callchain->nr;
883 unsigned int i;
884
885 for (i = 0; i < kernel_callchain_nr; i++) {
886 if (callchain->ips[i] == PERF_CONTEXT_USER)
887 break;
888 }
889
890 if ((i != kernel_callchain_nr) && lbr_stack->nr) {
891 u64 total_nr;
892 /*
893 * LBR callstack can only get user call chain,
894 * i is kernel call chain number,
895 * 1 is PERF_CONTEXT_USER.
896 *
897 * The user call chain is stored in LBR registers.
898 * LBR are pair registers. The caller is stored
899 * in "from" register, while the callee is stored
900 * in "to" register.
901 * For example, there is a call stack
902 * "A"->"B"->"C"->"D".
903 * The LBR registers will recorde like
904 * "C"->"D", "B"->"C", "A"->"B".
905 * So only the first "to" register and all "from"
906 * registers are needed to construct the whole stack.
907 */
908 total_nr = i + 1 + lbr_stack->nr + 1;
909 kernel_callchain_nr = i + 1;
910
911 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
912
913 for (i = 0; i < kernel_callchain_nr; i++)
914 printf("..... %2d: %016" PRIx64 "\n",
915 i, callchain->ips[i]);
916
917 printf("..... %2d: %016" PRIx64 "\n",
918 (int)(kernel_callchain_nr), lbr_stack->entries[0].to);
919 for (i = 0; i < lbr_stack->nr; i++)
920 printf("..... %2d: %016" PRIx64 "\n",
921 (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from);
922 }
923 }
924
925 static void callchain__printf(struct perf_evsel *evsel,
926 struct perf_sample *sample)
927 {
928 unsigned int i;
929 struct ip_callchain *callchain = sample->callchain;
930
931 if (perf_evsel__has_branch_callstack(evsel))
932 callchain__lbr_callstack_printf(sample);
933
934 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
935
936 for (i = 0; i < callchain->nr; i++)
937 printf("..... %2d: %016" PRIx64 "\n",
938 i, callchain->ips[i]);
939 }
940
941 static void branch_stack__printf(struct perf_sample *sample)
942 {
943 uint64_t i;
944
945 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
946
947 for (i = 0; i < sample->branch_stack->nr; i++) {
948 struct branch_entry *e = &sample->branch_stack->entries[i];
949
950 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n",
951 i, e->from, e->to,
952 (unsigned short)e->flags.cycles,
953 e->flags.mispred ? "M" : " ",
954 e->flags.predicted ? "P" : " ",
955 e->flags.abort ? "A" : " ",
956 e->flags.in_tx ? "T" : " ",
957 (unsigned)e->flags.reserved);
958 }
959 }
960
961 static void regs_dump__printf(u64 mask, u64 *regs)
962 {
963 unsigned rid, i = 0;
964
965 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
966 u64 val = regs[i++];
967
968 printf(".... %-5s 0x%" PRIx64 "\n",
969 perf_reg_name(rid), val);
970 }
971 }
972
973 static const char *regs_abi[] = {
974 [PERF_SAMPLE_REGS_ABI_NONE] = "none",
975 [PERF_SAMPLE_REGS_ABI_32] = "32-bit",
976 [PERF_SAMPLE_REGS_ABI_64] = "64-bit",
977 };
978
979 static inline const char *regs_dump_abi(struct regs_dump *d)
980 {
981 if (d->abi > PERF_SAMPLE_REGS_ABI_64)
982 return "unknown";
983
984 return regs_abi[d->abi];
985 }
986
987 static void regs__printf(const char *type, struct regs_dump *regs)
988 {
989 u64 mask = regs->mask;
990
991 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
992 type,
993 mask,
994 regs_dump_abi(regs));
995
996 regs_dump__printf(mask, regs->regs);
997 }
998
999 static void regs_user__printf(struct perf_sample *sample)
1000 {
1001 struct regs_dump *user_regs = &sample->user_regs;
1002
1003 if (user_regs->regs)
1004 regs__printf("user", user_regs);
1005 }
1006
1007 static void regs_intr__printf(struct perf_sample *sample)
1008 {
1009 struct regs_dump *intr_regs = &sample->intr_regs;
1010
1011 if (intr_regs->regs)
1012 regs__printf("intr", intr_regs);
1013 }
1014
1015 static void stack_user__printf(struct stack_dump *dump)
1016 {
1017 printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
1018 dump->size, dump->offset);
1019 }
1020
1021 static void perf_evlist__print_tstamp(struct perf_evlist *evlist,
1022 union perf_event *event,
1023 struct perf_sample *sample)
1024 {
1025 u64 sample_type = __perf_evlist__combined_sample_type(evlist);
1026
1027 if (event->header.type != PERF_RECORD_SAMPLE &&
1028 !perf_evlist__sample_id_all(evlist)) {
1029 fputs("-1 -1 ", stdout);
1030 return;
1031 }
1032
1033 if ((sample_type & PERF_SAMPLE_CPU))
1034 printf("%u ", sample->cpu);
1035
1036 if (sample_type & PERF_SAMPLE_TIME)
1037 printf("%" PRIu64 " ", sample->time);
1038 }
1039
1040 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
1041 {
1042 printf("... sample_read:\n");
1043
1044 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1045 printf("...... time enabled %016" PRIx64 "\n",
1046 sample->read.time_enabled);
1047
1048 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1049 printf("...... time running %016" PRIx64 "\n",
1050 sample->read.time_running);
1051
1052 if (read_format & PERF_FORMAT_GROUP) {
1053 u64 i;
1054
1055 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
1056
1057 for (i = 0; i < sample->read.group.nr; i++) {
1058 struct sample_read_value *value;
1059
1060 value = &sample->read.group.values[i];
1061 printf("..... id %016" PRIx64
1062 ", value %016" PRIx64 "\n",
1063 value->id, value->value);
1064 }
1065 } else
1066 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
1067 sample->read.one.id, sample->read.one.value);
1068 }
1069
1070 static void dump_event(struct perf_evlist *evlist, union perf_event *event,
1071 u64 file_offset, struct perf_sample *sample)
1072 {
1073 if (!dump_trace)
1074 return;
1075
1076 printf("\n%#" PRIx64 " [%#x]: event: %d\n",
1077 file_offset, event->header.size, event->header.type);
1078
1079 trace_event(event);
1080
1081 if (sample)
1082 perf_evlist__print_tstamp(evlist, event, sample);
1083
1084 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
1085 event->header.size, perf_event__name(event->header.type));
1086 }
1087
1088 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
1089 struct perf_sample *sample)
1090 {
1091 u64 sample_type;
1092
1093 if (!dump_trace)
1094 return;
1095
1096 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
1097 event->header.misc, sample->pid, sample->tid, sample->ip,
1098 sample->period, sample->addr);
1099
1100 sample_type = evsel->attr.sample_type;
1101
1102 if (sample_type & PERF_SAMPLE_CALLCHAIN)
1103 callchain__printf(evsel, sample);
1104
1105 if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !perf_evsel__has_branch_callstack(evsel))
1106 branch_stack__printf(sample);
1107
1108 if (sample_type & PERF_SAMPLE_REGS_USER)
1109 regs_user__printf(sample);
1110
1111 if (sample_type & PERF_SAMPLE_REGS_INTR)
1112 regs_intr__printf(sample);
1113
1114 if (sample_type & PERF_SAMPLE_STACK_USER)
1115 stack_user__printf(&sample->user_stack);
1116
1117 if (sample_type & PERF_SAMPLE_WEIGHT)
1118 printf("... weight: %" PRIu64 "\n", sample->weight);
1119
1120 if (sample_type & PERF_SAMPLE_DATA_SRC)
1121 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
1122
1123 if (sample_type & PERF_SAMPLE_PHYS_ADDR)
1124 printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr);
1125
1126 if (sample_type & PERF_SAMPLE_TRANSACTION)
1127 printf("... transaction: %" PRIx64 "\n", sample->transaction);
1128
1129 if (sample_type & PERF_SAMPLE_READ)
1130 sample_read__printf(sample, evsel->attr.read_format);
1131 }
1132
1133 static void dump_read(struct perf_evsel *evsel, union perf_event *event)
1134 {
1135 struct read_event *read_event = &event->read;
1136 u64 read_format;
1137
1138 if (!dump_trace)
1139 return;
1140
1141 printf(": %d %d %s %" PRIu64 "\n", event->read.pid, event->read.tid,
1142 evsel ? perf_evsel__name(evsel) : "FAIL",
1143 event->read.value);
1144
1145 read_format = evsel->attr.read_format;
1146
1147 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1148 printf("... time enabled : %" PRIu64 "\n", read_event->time_enabled);
1149
1150 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1151 printf("... time running : %" PRIu64 "\n", read_event->time_running);
1152
1153 if (read_format & PERF_FORMAT_ID)
1154 printf("... id : %" PRIu64 "\n", read_event->id);
1155 }
1156
1157 static struct machine *machines__find_for_cpumode(struct machines *machines,
1158 union perf_event *event,
1159 struct perf_sample *sample)
1160 {
1161 struct machine *machine;
1162
1163 if (perf_guest &&
1164 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1165 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1166 u32 pid;
1167
1168 if (event->header.type == PERF_RECORD_MMAP
1169 || event->header.type == PERF_RECORD_MMAP2)
1170 pid = event->mmap.pid;
1171 else
1172 pid = sample->pid;
1173
1174 machine = machines__find(machines, pid);
1175 if (!machine)
1176 machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID);
1177 return machine;
1178 }
1179
1180 return &machines->host;
1181 }
1182
1183 static int deliver_sample_value(struct perf_evlist *evlist,
1184 struct perf_tool *tool,
1185 union perf_event *event,
1186 struct perf_sample *sample,
1187 struct sample_read_value *v,
1188 struct machine *machine)
1189 {
1190 struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
1191
1192 if (sid) {
1193 sample->id = v->id;
1194 sample->period = v->value - sid->period;
1195 sid->period = v->value;
1196 }
1197
1198 if (!sid || sid->evsel == NULL) {
1199 ++evlist->stats.nr_unknown_id;
1200 return 0;
1201 }
1202
1203 return tool->sample(tool, event, sample, sid->evsel, machine);
1204 }
1205
1206 static int deliver_sample_group(struct perf_evlist *evlist,
1207 struct perf_tool *tool,
1208 union perf_event *event,
1209 struct perf_sample *sample,
1210 struct machine *machine)
1211 {
1212 int ret = -EINVAL;
1213 u64 i;
1214
1215 for (i = 0; i < sample->read.group.nr; i++) {
1216 ret = deliver_sample_value(evlist, tool, event, sample,
1217 &sample->read.group.values[i],
1218 machine);
1219 if (ret)
1220 break;
1221 }
1222
1223 return ret;
1224 }
1225
1226 static int
1227 perf_evlist__deliver_sample(struct perf_evlist *evlist,
1228 struct perf_tool *tool,
1229 union perf_event *event,
1230 struct perf_sample *sample,
1231 struct perf_evsel *evsel,
1232 struct machine *machine)
1233 {
1234 /* We know evsel != NULL. */
1235 u64 sample_type = evsel->attr.sample_type;
1236 u64 read_format = evsel->attr.read_format;
1237
1238 /* Standard sample delivery. */
1239 if (!(sample_type & PERF_SAMPLE_READ))
1240 return tool->sample(tool, event, sample, evsel, machine);
1241
1242 /* For PERF_SAMPLE_READ we have either single or group mode. */
1243 if (read_format & PERF_FORMAT_GROUP)
1244 return deliver_sample_group(evlist, tool, event, sample,
1245 machine);
1246 else
1247 return deliver_sample_value(evlist, tool, event, sample,
1248 &sample->read.one, machine);
1249 }
1250
1251 static int machines__deliver_event(struct machines *machines,
1252 struct perf_evlist *evlist,
1253 union perf_event *event,
1254 struct perf_sample *sample,
1255 struct perf_tool *tool, u64 file_offset)
1256 {
1257 struct perf_evsel *evsel;
1258 struct machine *machine;
1259
1260 dump_event(evlist, event, file_offset, sample);
1261
1262 evsel = perf_evlist__id2evsel(evlist, sample->id);
1263
1264 machine = machines__find_for_cpumode(machines, event, sample);
1265
1266 switch (event->header.type) {
1267 case PERF_RECORD_SAMPLE:
1268 if (evsel == NULL) {
1269 ++evlist->stats.nr_unknown_id;
1270 return 0;
1271 }
1272 dump_sample(evsel, event, sample);
1273 if (machine == NULL) {
1274 ++evlist->stats.nr_unprocessable_samples;
1275 return 0;
1276 }
1277 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1278 case PERF_RECORD_MMAP:
1279 return tool->mmap(tool, event, sample, machine);
1280 case PERF_RECORD_MMAP2:
1281 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1282 ++evlist->stats.nr_proc_map_timeout;
1283 return tool->mmap2(tool, event, sample, machine);
1284 case PERF_RECORD_COMM:
1285 return tool->comm(tool, event, sample, machine);
1286 case PERF_RECORD_NAMESPACES:
1287 return tool->namespaces(tool, event, sample, machine);
1288 case PERF_RECORD_FORK:
1289 return tool->fork(tool, event, sample, machine);
1290 case PERF_RECORD_EXIT:
1291 return tool->exit(tool, event, sample, machine);
1292 case PERF_RECORD_LOST:
1293 if (tool->lost == perf_event__process_lost)
1294 evlist->stats.total_lost += event->lost.lost;
1295 return tool->lost(tool, event, sample, machine);
1296 case PERF_RECORD_LOST_SAMPLES:
1297 if (tool->lost_samples == perf_event__process_lost_samples)
1298 evlist->stats.total_lost_samples += event->lost_samples.lost;
1299 return tool->lost_samples(tool, event, sample, machine);
1300 case PERF_RECORD_READ:
1301 dump_read(evsel, event);
1302 return tool->read(tool, event, sample, evsel, machine);
1303 case PERF_RECORD_THROTTLE:
1304 return tool->throttle(tool, event, sample, machine);
1305 case PERF_RECORD_UNTHROTTLE:
1306 return tool->unthrottle(tool, event, sample, machine);
1307 case PERF_RECORD_AUX:
1308 if (tool->aux == perf_event__process_aux) {
1309 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED)
1310 evlist->stats.total_aux_lost += 1;
1311 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL)
1312 evlist->stats.total_aux_partial += 1;
1313 }
1314 return tool->aux(tool, event, sample, machine);
1315 case PERF_RECORD_ITRACE_START:
1316 return tool->itrace_start(tool, event, sample, machine);
1317 case PERF_RECORD_SWITCH:
1318 case PERF_RECORD_SWITCH_CPU_WIDE:
1319 return tool->context_switch(tool, event, sample, machine);
1320 default:
1321 ++evlist->stats.nr_unknown_events;
1322 return -1;
1323 }
1324 }
1325
1326 static int perf_session__deliver_event(struct perf_session *session,
1327 union perf_event *event,
1328 struct perf_sample *sample,
1329 struct perf_tool *tool,
1330 u64 file_offset)
1331 {
1332 int ret;
1333
1334 ret = auxtrace__process_event(session, event, sample, tool);
1335 if (ret < 0)
1336 return ret;
1337 if (ret > 0)
1338 return 0;
1339
1340 return machines__deliver_event(&session->machines, session->evlist,
1341 event, sample, tool, file_offset);
1342 }
1343
1344 static s64 perf_session__process_user_event(struct perf_session *session,
1345 union perf_event *event,
1346 u64 file_offset)
1347 {
1348 struct ordered_events *oe = &session->ordered_events;
1349 struct perf_tool *tool = session->tool;
1350 int fd = perf_data_file__fd(session->file);
1351 int err;
1352
1353 dump_event(session->evlist, event, file_offset, NULL);
1354
1355 /* These events are processed right away */
1356 switch (event->header.type) {
1357 case PERF_RECORD_HEADER_ATTR:
1358 err = tool->attr(tool, event, &session->evlist);
1359 if (err == 0) {
1360 perf_session__set_id_hdr_size(session);
1361 perf_session__set_comm_exec(session);
1362 }
1363 return err;
1364 case PERF_RECORD_EVENT_UPDATE:
1365 return tool->event_update(tool, event, &session->evlist);
1366 case PERF_RECORD_HEADER_EVENT_TYPE:
1367 /*
1368 * Depreceated, but we need to handle it for sake
1369 * of old data files create in pipe mode.
1370 */
1371 return 0;
1372 case PERF_RECORD_HEADER_TRACING_DATA:
1373 /* setup for reading amidst mmap */
1374 lseek(fd, file_offset, SEEK_SET);
1375 return tool->tracing_data(tool, event, session);
1376 case PERF_RECORD_HEADER_BUILD_ID:
1377 return tool->build_id(tool, event, session);
1378 case PERF_RECORD_FINISHED_ROUND:
1379 return tool->finished_round(tool, event, oe);
1380 case PERF_RECORD_ID_INDEX:
1381 return tool->id_index(tool, event, session);
1382 case PERF_RECORD_AUXTRACE_INFO:
1383 return tool->auxtrace_info(tool, event, session);
1384 case PERF_RECORD_AUXTRACE:
1385 /* setup for reading amidst mmap */
1386 lseek(fd, file_offset + event->header.size, SEEK_SET);
1387 return tool->auxtrace(tool, event, session);
1388 case PERF_RECORD_AUXTRACE_ERROR:
1389 perf_session__auxtrace_error_inc(session, event);
1390 return tool->auxtrace_error(tool, event, session);
1391 case PERF_RECORD_THREAD_MAP:
1392 return tool->thread_map(tool, event, session);
1393 case PERF_RECORD_CPU_MAP:
1394 return tool->cpu_map(tool, event, session);
1395 case PERF_RECORD_STAT_CONFIG:
1396 return tool->stat_config(tool, event, session);
1397 case PERF_RECORD_STAT:
1398 return tool->stat(tool, event, session);
1399 case PERF_RECORD_STAT_ROUND:
1400 return tool->stat_round(tool, event, session);
1401 case PERF_RECORD_TIME_CONV:
1402 session->time_conv = event->time_conv;
1403 return tool->time_conv(tool, event, session);
1404 case PERF_RECORD_HEADER_FEATURE:
1405 return tool->feature(tool, event, session);
1406 default:
1407 return -EINVAL;
1408 }
1409 }
1410
1411 int perf_session__deliver_synth_event(struct perf_session *session,
1412 union perf_event *event,
1413 struct perf_sample *sample)
1414 {
1415 struct perf_evlist *evlist = session->evlist;
1416 struct perf_tool *tool = session->tool;
1417
1418 events_stats__inc(&evlist->stats, event->header.type);
1419
1420 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1421 return perf_session__process_user_event(session, event, 0);
1422
1423 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0);
1424 }
1425
1426 static void event_swap(union perf_event *event, bool sample_id_all)
1427 {
1428 perf_event__swap_op swap;
1429
1430 swap = perf_event__swap_ops[event->header.type];
1431 if (swap)
1432 swap(event, sample_id_all);
1433 }
1434
1435 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1436 void *buf, size_t buf_sz,
1437 union perf_event **event_ptr,
1438 struct perf_sample *sample)
1439 {
1440 union perf_event *event;
1441 size_t hdr_sz, rest;
1442 int fd;
1443
1444 if (session->one_mmap && !session->header.needs_swap) {
1445 event = file_offset - session->one_mmap_offset +
1446 session->one_mmap_addr;
1447 goto out_parse_sample;
1448 }
1449
1450 if (perf_data_file__is_pipe(session->file))
1451 return -1;
1452
1453 fd = perf_data_file__fd(session->file);
1454 hdr_sz = sizeof(struct perf_event_header);
1455
1456 if (buf_sz < hdr_sz)
1457 return -1;
1458
1459 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1460 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1461 return -1;
1462
1463 event = (union perf_event *)buf;
1464
1465 if (session->header.needs_swap)
1466 perf_event_header__bswap(&event->header);
1467
1468 if (event->header.size < hdr_sz || event->header.size > buf_sz)
1469 return -1;
1470
1471 rest = event->header.size - hdr_sz;
1472
1473 if (readn(fd, buf, rest) != (ssize_t)rest)
1474 return -1;
1475
1476 if (session->header.needs_swap)
1477 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1478
1479 out_parse_sample:
1480
1481 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1482 perf_evlist__parse_sample(session->evlist, event, sample))
1483 return -1;
1484
1485 *event_ptr = event;
1486
1487 return 0;
1488 }
1489
1490 static s64 perf_session__process_event(struct perf_session *session,
1491 union perf_event *event, u64 file_offset)
1492 {
1493 struct perf_evlist *evlist = session->evlist;
1494 struct perf_tool *tool = session->tool;
1495 struct perf_sample sample;
1496 int ret;
1497
1498 if (session->header.needs_swap)
1499 event_swap(event, perf_evlist__sample_id_all(evlist));
1500
1501 if (event->header.type >= PERF_RECORD_HEADER_MAX)
1502 return -EINVAL;
1503
1504 events_stats__inc(&evlist->stats, event->header.type);
1505
1506 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1507 return perf_session__process_user_event(session, event, file_offset);
1508
1509 /*
1510 * For all kernel events we get the sample data
1511 */
1512 ret = perf_evlist__parse_sample(evlist, event, &sample);
1513 if (ret)
1514 return ret;
1515
1516 if (tool->ordered_events) {
1517 ret = perf_session__queue_event(session, event, &sample, file_offset);
1518 if (ret != -ETIME)
1519 return ret;
1520 }
1521
1522 return perf_session__deliver_event(session, event, &sample, tool,
1523 file_offset);
1524 }
1525
1526 void perf_event_header__bswap(struct perf_event_header *hdr)
1527 {
1528 hdr->type = bswap_32(hdr->type);
1529 hdr->misc = bswap_16(hdr->misc);
1530 hdr->size = bswap_16(hdr->size);
1531 }
1532
1533 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1534 {
1535 return machine__findnew_thread(&session->machines.host, -1, pid);
1536 }
1537
1538 int perf_session__register_idle_thread(struct perf_session *session)
1539 {
1540 struct thread *thread;
1541 int err = 0;
1542
1543 thread = machine__findnew_thread(&session->machines.host, 0, 0);
1544 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1545 pr_err("problem inserting idle task.\n");
1546 err = -1;
1547 }
1548
1549 if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) {
1550 pr_err("problem inserting idle task.\n");
1551 err = -1;
1552 }
1553
1554 /* machine__findnew_thread() got the thread, so put it */
1555 thread__put(thread);
1556 return err;
1557 }
1558
1559 static void
1560 perf_session__warn_order(const struct perf_session *session)
1561 {
1562 const struct ordered_events *oe = &session->ordered_events;
1563 struct perf_evsel *evsel;
1564 bool should_warn = true;
1565
1566 evlist__for_each_entry(session->evlist, evsel) {
1567 if (evsel->attr.write_backward)
1568 should_warn = false;
1569 }
1570
1571 if (!should_warn)
1572 return;
1573 if (oe->nr_unordered_events != 0)
1574 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1575 }
1576
1577 static void perf_session__warn_about_errors(const struct perf_session *session)
1578 {
1579 const struct events_stats *stats = &session->evlist->stats;
1580
1581 if (session->tool->lost == perf_event__process_lost &&
1582 stats->nr_events[PERF_RECORD_LOST] != 0) {
1583 ui__warning("Processed %d events and lost %d chunks!\n\n"
1584 "Check IO/CPU overload!\n\n",
1585 stats->nr_events[0],
1586 stats->nr_events[PERF_RECORD_LOST]);
1587 }
1588
1589 if (session->tool->lost_samples == perf_event__process_lost_samples) {
1590 double drop_rate;
1591
1592 drop_rate = (double)stats->total_lost_samples /
1593 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1594 if (drop_rate > 0.05) {
1595 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%% samples!\n\n",
1596 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1597 drop_rate * 100.0);
1598 }
1599 }
1600
1601 if (session->tool->aux == perf_event__process_aux &&
1602 stats->total_aux_lost != 0) {
1603 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1604 stats->total_aux_lost,
1605 stats->nr_events[PERF_RECORD_AUX]);
1606 }
1607
1608 if (session->tool->aux == perf_event__process_aux &&
1609 stats->total_aux_partial != 0) {
1610 bool vmm_exclusive = false;
1611
1612 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive",
1613 &vmm_exclusive);
1614
1615 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n"
1616 "Are you running a KVM guest in the background?%s\n\n",
1617 stats->total_aux_partial,
1618 stats->nr_events[PERF_RECORD_AUX],
1619 vmm_exclusive ?
1620 "\nReloading kvm_intel module with vmm_exclusive=0\n"
1621 "will reduce the gaps to only guest's timeslices." :
1622 "");
1623 }
1624
1625 if (stats->nr_unknown_events != 0) {
1626 ui__warning("Found %u unknown events!\n\n"
1627 "Is this an older tool processing a perf.data "
1628 "file generated by a more recent tool?\n\n"
1629 "If that is not the case, consider "
1630 "reporting to linux-kernel@vger.kernel.org.\n\n",
1631 stats->nr_unknown_events);
1632 }
1633
1634 if (stats->nr_unknown_id != 0) {
1635 ui__warning("%u samples with id not present in the header\n",
1636 stats->nr_unknown_id);
1637 }
1638
1639 if (stats->nr_invalid_chains != 0) {
1640 ui__warning("Found invalid callchains!\n\n"
1641 "%u out of %u events were discarded for this reason.\n\n"
1642 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1643 stats->nr_invalid_chains,
1644 stats->nr_events[PERF_RECORD_SAMPLE]);
1645 }
1646
1647 if (stats->nr_unprocessable_samples != 0) {
1648 ui__warning("%u unprocessable samples recorded.\n"
1649 "Do you have a KVM guest running and not using 'perf kvm'?\n",
1650 stats->nr_unprocessable_samples);
1651 }
1652
1653 perf_session__warn_order(session);
1654
1655 events_stats__auxtrace_error_warn(stats);
1656
1657 if (stats->nr_proc_map_timeout != 0) {
1658 ui__warning("%d map information files for pre-existing threads were\n"
1659 "not processed, if there are samples for addresses they\n"
1660 "will not be resolved, you may find out which are these\n"
1661 "threads by running with -v and redirecting the output\n"
1662 "to a file.\n"
1663 "The time limit to process proc map is too short?\n"
1664 "Increase it by --proc-map-timeout\n",
1665 stats->nr_proc_map_timeout);
1666 }
1667 }
1668
1669 static int perf_session__flush_thread_stack(struct thread *thread,
1670 void *p __maybe_unused)
1671 {
1672 return thread_stack__flush(thread);
1673 }
1674
1675 static int perf_session__flush_thread_stacks(struct perf_session *session)
1676 {
1677 return machines__for_each_thread(&session->machines,
1678 perf_session__flush_thread_stack,
1679 NULL);
1680 }
1681
1682 volatile int session_done;
1683
1684 static int __perf_session__process_pipe_events(struct perf_session *session)
1685 {
1686 struct ordered_events *oe = &session->ordered_events;
1687 struct perf_tool *tool = session->tool;
1688 int fd = perf_data_file__fd(session->file);
1689 union perf_event *event;
1690 uint32_t size, cur_size = 0;
1691 void *buf = NULL;
1692 s64 skip = 0;
1693 u64 head;
1694 ssize_t err;
1695 void *p;
1696
1697 perf_tool__fill_defaults(tool);
1698
1699 head = 0;
1700 cur_size = sizeof(union perf_event);
1701
1702 buf = malloc(cur_size);
1703 if (!buf)
1704 return -errno;
1705 ordered_events__set_copy_on_queue(oe, true);
1706 more:
1707 event = buf;
1708 err = readn(fd, event, sizeof(struct perf_event_header));
1709 if (err <= 0) {
1710 if (err == 0)
1711 goto done;
1712
1713 pr_err("failed to read event header\n");
1714 goto out_err;
1715 }
1716
1717 if (session->header.needs_swap)
1718 perf_event_header__bswap(&event->header);
1719
1720 size = event->header.size;
1721 if (size < sizeof(struct perf_event_header)) {
1722 pr_err("bad event header size\n");
1723 goto out_err;
1724 }
1725
1726 if (size > cur_size) {
1727 void *new = realloc(buf, size);
1728 if (!new) {
1729 pr_err("failed to allocate memory to read event\n");
1730 goto out_err;
1731 }
1732 buf = new;
1733 cur_size = size;
1734 event = buf;
1735 }
1736 p = event;
1737 p += sizeof(struct perf_event_header);
1738
1739 if (size - sizeof(struct perf_event_header)) {
1740 err = readn(fd, p, size - sizeof(struct perf_event_header));
1741 if (err <= 0) {
1742 if (err == 0) {
1743 pr_err("unexpected end of event stream\n");
1744 goto done;
1745 }
1746
1747 pr_err("failed to read event data\n");
1748 goto out_err;
1749 }
1750 }
1751
1752 if ((skip = perf_session__process_event(session, event, head)) < 0) {
1753 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1754 head, event->header.size, event->header.type);
1755 err = -EINVAL;
1756 goto out_err;
1757 }
1758
1759 head += size;
1760
1761 if (skip > 0)
1762 head += skip;
1763
1764 if (!session_done())
1765 goto more;
1766 done:
1767 /* do the final flush for ordered samples */
1768 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1769 if (err)
1770 goto out_err;
1771 err = auxtrace__flush_events(session, tool);
1772 if (err)
1773 goto out_err;
1774 err = perf_session__flush_thread_stacks(session);
1775 out_err:
1776 free(buf);
1777 perf_session__warn_about_errors(session);
1778 ordered_events__free(&session->ordered_events);
1779 auxtrace__free_events(session);
1780 return err;
1781 }
1782
1783 static union perf_event *
1784 fetch_mmaped_event(struct perf_session *session,
1785 u64 head, size_t mmap_size, char *buf)
1786 {
1787 union perf_event *event;
1788
1789 /*
1790 * Ensure we have enough space remaining to read
1791 * the size of the event in the headers.
1792 */
1793 if (head + sizeof(event->header) > mmap_size)
1794 return NULL;
1795
1796 event = (union perf_event *)(buf + head);
1797
1798 if (session->header.needs_swap)
1799 perf_event_header__bswap(&event->header);
1800
1801 if (head + event->header.size > mmap_size) {
1802 /* We're not fetching the event so swap back again */
1803 if (session->header.needs_swap)
1804 perf_event_header__bswap(&event->header);
1805 return NULL;
1806 }
1807
1808 return event;
1809 }
1810
1811 /*
1812 * On 64bit we can mmap the data file in one go. No need for tiny mmap
1813 * slices. On 32bit we use 32MB.
1814 */
1815 #if BITS_PER_LONG == 64
1816 #define MMAP_SIZE ULLONG_MAX
1817 #define NUM_MMAPS 1
1818 #else
1819 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1820 #define NUM_MMAPS 128
1821 #endif
1822
1823 static int __perf_session__process_events(struct perf_session *session,
1824 u64 data_offset, u64 data_size,
1825 u64 file_size)
1826 {
1827 struct ordered_events *oe = &session->ordered_events;
1828 struct perf_tool *tool = session->tool;
1829 int fd = perf_data_file__fd(session->file);
1830 u64 head, page_offset, file_offset, file_pos, size;
1831 int err, mmap_prot, mmap_flags, map_idx = 0;
1832 size_t mmap_size;
1833 char *buf, *mmaps[NUM_MMAPS];
1834 union perf_event *event;
1835 struct ui_progress prog;
1836 s64 skip;
1837
1838 perf_tool__fill_defaults(tool);
1839
1840 page_offset = page_size * (data_offset / page_size);
1841 file_offset = page_offset;
1842 head = data_offset - page_offset;
1843
1844 if (data_size == 0)
1845 goto out;
1846
1847 if (data_offset + data_size < file_size)
1848 file_size = data_offset + data_size;
1849
1850 ui_progress__init(&prog, file_size, "Processing events...");
1851
1852 mmap_size = MMAP_SIZE;
1853 if (mmap_size > file_size) {
1854 mmap_size = file_size;
1855 session->one_mmap = true;
1856 }
1857
1858 memset(mmaps, 0, sizeof(mmaps));
1859
1860 mmap_prot = PROT_READ;
1861 mmap_flags = MAP_SHARED;
1862
1863 if (session->header.needs_swap) {
1864 mmap_prot |= PROT_WRITE;
1865 mmap_flags = MAP_PRIVATE;
1866 }
1867 remap:
1868 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1869 file_offset);
1870 if (buf == MAP_FAILED) {
1871 pr_err("failed to mmap file\n");
1872 err = -errno;
1873 goto out_err;
1874 }
1875 mmaps[map_idx] = buf;
1876 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1877 file_pos = file_offset + head;
1878 if (session->one_mmap) {
1879 session->one_mmap_addr = buf;
1880 session->one_mmap_offset = file_offset;
1881 }
1882
1883 more:
1884 event = fetch_mmaped_event(session, head, mmap_size, buf);
1885 if (!event) {
1886 if (mmaps[map_idx]) {
1887 munmap(mmaps[map_idx], mmap_size);
1888 mmaps[map_idx] = NULL;
1889 }
1890
1891 page_offset = page_size * (head / page_size);
1892 file_offset += page_offset;
1893 head -= page_offset;
1894 goto remap;
1895 }
1896
1897 size = event->header.size;
1898
1899 if (size < sizeof(struct perf_event_header) ||
1900 (skip = perf_session__process_event(session, event, file_pos)) < 0) {
1901 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1902 file_offset + head, event->header.size,
1903 event->header.type);
1904 err = -EINVAL;
1905 goto out_err;
1906 }
1907
1908 if (skip)
1909 size += skip;
1910
1911 head += size;
1912 file_pos += size;
1913
1914 ui_progress__update(&prog, size);
1915
1916 if (session_done())
1917 goto out;
1918
1919 if (file_pos < file_size)
1920 goto more;
1921
1922 out:
1923 /* do the final flush for ordered samples */
1924 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1925 if (err)
1926 goto out_err;
1927 err = auxtrace__flush_events(session, tool);
1928 if (err)
1929 goto out_err;
1930 err = perf_session__flush_thread_stacks(session);
1931 out_err:
1932 ui_progress__finish();
1933 perf_session__warn_about_errors(session);
1934 /*
1935 * We may switching perf.data output, make ordered_events
1936 * reusable.
1937 */
1938 ordered_events__reinit(&session->ordered_events);
1939 auxtrace__free_events(session);
1940 session->one_mmap = false;
1941 return err;
1942 }
1943
1944 int perf_session__process_events(struct perf_session *session)
1945 {
1946 u64 size = perf_data_file__size(session->file);
1947 int err;
1948
1949 if (perf_session__register_idle_thread(session) < 0)
1950 return -ENOMEM;
1951
1952 if (!perf_data_file__is_pipe(session->file))
1953 err = __perf_session__process_events(session,
1954 session->header.data_offset,
1955 session->header.data_size, size);
1956 else
1957 err = __perf_session__process_pipe_events(session);
1958
1959 return err;
1960 }
1961
1962 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1963 {
1964 struct perf_evsel *evsel;
1965
1966 evlist__for_each_entry(session->evlist, evsel) {
1967 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1968 return true;
1969 }
1970
1971 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1972 return false;
1973 }
1974
1975 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1976 const char *symbol_name, u64 addr)
1977 {
1978 char *bracket;
1979 int i;
1980 struct ref_reloc_sym *ref;
1981
1982 ref = zalloc(sizeof(struct ref_reloc_sym));
1983 if (ref == NULL)
1984 return -ENOMEM;
1985
1986 ref->name = strdup(symbol_name);
1987 if (ref->name == NULL) {
1988 free(ref);
1989 return -ENOMEM;
1990 }
1991
1992 bracket = strchr(ref->name, ']');
1993 if (bracket)
1994 *bracket = '\0';
1995
1996 ref->addr = addr;
1997
1998 for (i = 0; i < MAP__NR_TYPES; ++i) {
1999 struct kmap *kmap = map__kmap(maps[i]);
2000
2001 if (!kmap)
2002 continue;
2003 kmap->ref_reloc_sym = ref;
2004 }
2005
2006 return 0;
2007 }
2008
2009 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
2010 {
2011 return machines__fprintf_dsos(&session->machines, fp);
2012 }
2013
2014 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
2015 bool (skip)(struct dso *dso, int parm), int parm)
2016 {
2017 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
2018 }
2019
2020 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
2021 {
2022 size_t ret;
2023 const char *msg = "";
2024
2025 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
2026 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
2027
2028 ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
2029
2030 ret += events_stats__fprintf(&session->evlist->stats, fp);
2031 return ret;
2032 }
2033
2034 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
2035 {
2036 /*
2037 * FIXME: Here we have to actually print all the machines in this
2038 * session, not just the host...
2039 */
2040 return machine__fprintf(&session->machines.host, fp);
2041 }
2042
2043 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
2044 unsigned int type)
2045 {
2046 struct perf_evsel *pos;
2047
2048 evlist__for_each_entry(session->evlist, pos) {
2049 if (pos->attr.type == type)
2050 return pos;
2051 }
2052 return NULL;
2053 }
2054
2055 int perf_session__cpu_bitmap(struct perf_session *session,
2056 const char *cpu_list, unsigned long *cpu_bitmap)
2057 {
2058 int i, err = -1;
2059 struct cpu_map *map;
2060
2061 for (i = 0; i < PERF_TYPE_MAX; ++i) {
2062 struct perf_evsel *evsel;
2063
2064 evsel = perf_session__find_first_evtype(session, i);
2065 if (!evsel)
2066 continue;
2067
2068 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
2069 pr_err("File does not contain CPU events. "
2070 "Remove -C option to proceed.\n");
2071 return -1;
2072 }
2073 }
2074
2075 map = cpu_map__new(cpu_list);
2076 if (map == NULL) {
2077 pr_err("Invalid cpu_list\n");
2078 return -1;
2079 }
2080
2081 for (i = 0; i < map->nr; i++) {
2082 int cpu = map->map[i];
2083
2084 if (cpu >= MAX_NR_CPUS) {
2085 pr_err("Requested CPU %d too large. "
2086 "Consider raising MAX_NR_CPUS\n", cpu);
2087 goto out_delete_map;
2088 }
2089
2090 set_bit(cpu, cpu_bitmap);
2091 }
2092
2093 err = 0;
2094
2095 out_delete_map:
2096 cpu_map__put(map);
2097 return err;
2098 }
2099
2100 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
2101 bool full)
2102 {
2103 if (session == NULL || fp == NULL)
2104 return;
2105
2106 fprintf(fp, "# ========\n");
2107 perf_header__fprintf_info(session, fp, full);
2108 fprintf(fp, "# ========\n#\n");
2109 }
2110
2111
2112 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
2113 const struct perf_evsel_str_handler *assocs,
2114 size_t nr_assocs)
2115 {
2116 struct perf_evsel *evsel;
2117 size_t i;
2118 int err;
2119
2120 for (i = 0; i < nr_assocs; i++) {
2121 /*
2122 * Adding a handler for an event not in the session,
2123 * just ignore it.
2124 */
2125 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
2126 if (evsel == NULL)
2127 continue;
2128
2129 err = -EEXIST;
2130 if (evsel->handler != NULL)
2131 goto out;
2132 evsel->handler = assocs[i].handler;
2133 }
2134
2135 err = 0;
2136 out:
2137 return err;
2138 }
2139
2140 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused,
2141 union perf_event *event,
2142 struct perf_session *session)
2143 {
2144 struct perf_evlist *evlist = session->evlist;
2145 struct id_index_event *ie = &event->id_index;
2146 size_t i, nr, max_nr;
2147
2148 max_nr = (ie->header.size - sizeof(struct id_index_event)) /
2149 sizeof(struct id_index_entry);
2150 nr = ie->nr;
2151 if (nr > max_nr)
2152 return -EINVAL;
2153
2154 if (dump_trace)
2155 fprintf(stdout, " nr: %zu\n", nr);
2156
2157 for (i = 0; i < nr; i++) {
2158 struct id_index_entry *e = &ie->entries[i];
2159 struct perf_sample_id *sid;
2160
2161 if (dump_trace) {
2162 fprintf(stdout, " ... id: %"PRIu64, e->id);
2163 fprintf(stdout, " idx: %"PRIu64, e->idx);
2164 fprintf(stdout, " cpu: %"PRId64, e->cpu);
2165 fprintf(stdout, " tid: %"PRId64"\n", e->tid);
2166 }
2167
2168 sid = perf_evlist__id2sid(evlist, e->id);
2169 if (!sid)
2170 return -ENOENT;
2171 sid->idx = e->idx;
2172 sid->cpu = e->cpu;
2173 sid->tid = e->tid;
2174 }
2175 return 0;
2176 }
2177
2178 int perf_event__synthesize_id_index(struct perf_tool *tool,
2179 perf_event__handler_t process,
2180 struct perf_evlist *evlist,
2181 struct machine *machine)
2182 {
2183 union perf_event *ev;
2184 struct perf_evsel *evsel;
2185 size_t nr = 0, i = 0, sz, max_nr, n;
2186 int err;
2187
2188 pr_debug2("Synthesizing id index\n");
2189
2190 max_nr = (UINT16_MAX - sizeof(struct id_index_event)) /
2191 sizeof(struct id_index_entry);
2192
2193 evlist__for_each_entry(evlist, evsel)
2194 nr += evsel->ids;
2195
2196 n = nr > max_nr ? max_nr : nr;
2197 sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry);
2198 ev = zalloc(sz);
2199 if (!ev)
2200 return -ENOMEM;
2201
2202 ev->id_index.header.type = PERF_RECORD_ID_INDEX;
2203 ev->id_index.header.size = sz;
2204 ev->id_index.nr = n;
2205
2206 evlist__for_each_entry(evlist, evsel) {
2207 u32 j;
2208
2209 for (j = 0; j < evsel->ids; j++) {
2210 struct id_index_entry *e;
2211 struct perf_sample_id *sid;
2212
2213 if (i >= n) {
2214 err = process(tool, ev, NULL, machine);
2215 if (err)
2216 goto out_err;
2217 nr -= n;
2218 i = 0;
2219 }
2220
2221 e = &ev->id_index.entries[i++];
2222
2223 e->id = evsel->id[j];
2224
2225 sid = perf_evlist__id2sid(evlist, e->id);
2226 if (!sid) {
2227 free(ev);
2228 return -ENOENT;
2229 }
2230
2231 e->idx = sid->idx;
2232 e->cpu = sid->cpu;
2233 e->tid = sid->tid;
2234 }
2235 }
2236
2237 sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry);
2238 ev->id_index.header.size = sz;
2239 ev->id_index.nr = nr;
2240
2241 err = process(tool, ev, NULL, machine);
2242 out_err:
2243 free(ev);
2244
2245 return err;
2246 }
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