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perf tools: Add event_update user level event
[deliverable/linux.git] / tools / perf / util / session.c
... / ...
CommitLineData
1#include <linux/kernel.h>
2#include <traceevent/event-parse.h>
3
4#include <byteswap.h>
5#include <unistd.h>
6#include <sys/types.h>
7#include <sys/mman.h>
8
9#include "evlist.h"
10#include "evsel.h"
11#include "session.h"
12#include "tool.h"
13#include "sort.h"
14#include "util.h"
15#include "cpumap.h"
16#include "perf_regs.h"
17#include "asm/bug.h"
18#include "auxtrace.h"
19#include "thread-stack.h"
20
21static int perf_session__deliver_event(struct perf_session *session,
22 union perf_event *event,
23 struct perf_sample *sample,
24 struct perf_tool *tool,
25 u64 file_offset);
26
27static int perf_session__open(struct perf_session *session)
28{
29 struct perf_data_file *file = session->file;
30
31 if (perf_session__read_header(session) < 0) {
32 pr_err("incompatible file format (rerun with -v to learn more)\n");
33 return -1;
34 }
35
36 if (perf_data_file__is_pipe(file))
37 return 0;
38
39 if (!perf_evlist__valid_sample_type(session->evlist)) {
40 pr_err("non matching sample_type\n");
41 return -1;
42 }
43
44 if (!perf_evlist__valid_sample_id_all(session->evlist)) {
45 pr_err("non matching sample_id_all\n");
46 return -1;
47 }
48
49 if (!perf_evlist__valid_read_format(session->evlist)) {
50 pr_err("non matching read_format\n");
51 return -1;
52 }
53
54 return 0;
55}
56
57void perf_session__set_id_hdr_size(struct perf_session *session)
58{
59 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
60
61 machines__set_id_hdr_size(&session->machines, id_hdr_size);
62}
63
64int perf_session__create_kernel_maps(struct perf_session *session)
65{
66 int ret = machine__create_kernel_maps(&session->machines.host);
67
68 if (ret >= 0)
69 ret = machines__create_guest_kernel_maps(&session->machines);
70 return ret;
71}
72
73static void perf_session__destroy_kernel_maps(struct perf_session *session)
74{
75 machines__destroy_kernel_maps(&session->machines);
76}
77
78static bool perf_session__has_comm_exec(struct perf_session *session)
79{
80 struct perf_evsel *evsel;
81
82 evlist__for_each(session->evlist, evsel) {
83 if (evsel->attr.comm_exec)
84 return true;
85 }
86
87 return false;
88}
89
90static void perf_session__set_comm_exec(struct perf_session *session)
91{
92 bool comm_exec = perf_session__has_comm_exec(session);
93
94 machines__set_comm_exec(&session->machines, comm_exec);
95}
96
97static int ordered_events__deliver_event(struct ordered_events *oe,
98 struct ordered_event *event)
99{
100 struct perf_sample sample;
101 struct perf_session *session = container_of(oe, struct perf_session,
102 ordered_events);
103 int ret = perf_evlist__parse_sample(session->evlist, event->event, &sample);
104
105 if (ret) {
106 pr_err("Can't parse sample, err = %d\n", ret);
107 return ret;
108 }
109
110 return perf_session__deliver_event(session, event->event, &sample,
111 session->tool, event->file_offset);
112}
113
114struct perf_session *perf_session__new(struct perf_data_file *file,
115 bool repipe, struct perf_tool *tool)
116{
117 struct perf_session *session = zalloc(sizeof(*session));
118
119 if (!session)
120 goto out;
121
122 session->repipe = repipe;
123 session->tool = tool;
124 INIT_LIST_HEAD(&session->auxtrace_index);
125 machines__init(&session->machines);
126 ordered_events__init(&session->ordered_events, ordered_events__deliver_event);
127
128 if (file) {
129 if (perf_data_file__open(file))
130 goto out_delete;
131
132 session->file = file;
133
134 if (perf_data_file__is_read(file)) {
135 if (perf_session__open(session) < 0)
136 goto out_close;
137
138 perf_session__set_id_hdr_size(session);
139 perf_session__set_comm_exec(session);
140 }
141 } else {
142 session->machines.host.env = &perf_env;
143 }
144
145 if (!file || perf_data_file__is_write(file)) {
146 /*
147 * In O_RDONLY mode this will be performed when reading the
148 * kernel MMAP event, in perf_event__process_mmap().
149 */
150 if (perf_session__create_kernel_maps(session) < 0)
151 pr_warning("Cannot read kernel map\n");
152 }
153
154 if (tool && tool->ordering_requires_timestamps &&
155 tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) {
156 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
157 tool->ordered_events = false;
158 }
159
160 return session;
161
162 out_close:
163 perf_data_file__close(file);
164 out_delete:
165 perf_session__delete(session);
166 out:
167 return NULL;
168}
169
170static void perf_session__delete_threads(struct perf_session *session)
171{
172 machine__delete_threads(&session->machines.host);
173}
174
175void perf_session__delete(struct perf_session *session)
176{
177 auxtrace__free(session);
178 auxtrace_index__free(&session->auxtrace_index);
179 perf_session__destroy_kernel_maps(session);
180 perf_session__delete_threads(session);
181 perf_env__exit(&session->header.env);
182 machines__exit(&session->machines);
183 if (session->file)
184 perf_data_file__close(session->file);
185 free(session);
186}
187
188static int process_event_synth_tracing_data_stub(struct perf_tool *tool
189 __maybe_unused,
190 union perf_event *event
191 __maybe_unused,
192 struct perf_session *session
193 __maybe_unused)
194{
195 dump_printf(": unhandled!\n");
196 return 0;
197}
198
199static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
200 union perf_event *event __maybe_unused,
201 struct perf_evlist **pevlist
202 __maybe_unused)
203{
204 dump_printf(": unhandled!\n");
205 return 0;
206}
207
208static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused,
209 union perf_event *event __maybe_unused,
210 struct perf_evlist **pevlist
211 __maybe_unused)
212{
213 dump_printf(": unhandled!\n");
214 return 0;
215}
216
217static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
218 union perf_event *event __maybe_unused,
219 struct perf_sample *sample __maybe_unused,
220 struct perf_evsel *evsel __maybe_unused,
221 struct machine *machine __maybe_unused)
222{
223 dump_printf(": unhandled!\n");
224 return 0;
225}
226
227static int process_event_stub(struct perf_tool *tool __maybe_unused,
228 union perf_event *event __maybe_unused,
229 struct perf_sample *sample __maybe_unused,
230 struct machine *machine __maybe_unused)
231{
232 dump_printf(": unhandled!\n");
233 return 0;
234}
235
236static int process_build_id_stub(struct perf_tool *tool __maybe_unused,
237 union perf_event *event __maybe_unused,
238 struct perf_session *session __maybe_unused)
239{
240 dump_printf(": unhandled!\n");
241 return 0;
242}
243
244static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
245 union perf_event *event __maybe_unused,
246 struct ordered_events *oe __maybe_unused)
247{
248 dump_printf(": unhandled!\n");
249 return 0;
250}
251
252static int process_finished_round(struct perf_tool *tool,
253 union perf_event *event,
254 struct ordered_events *oe);
255
256static int process_id_index_stub(struct perf_tool *tool __maybe_unused,
257 union perf_event *event __maybe_unused,
258 struct perf_session *perf_session
259 __maybe_unused)
260{
261 dump_printf(": unhandled!\n");
262 return 0;
263}
264
265static int process_event_auxtrace_info_stub(struct perf_tool *tool __maybe_unused,
266 union perf_event *event __maybe_unused,
267 struct perf_session *session __maybe_unused)
268{
269 dump_printf(": unhandled!\n");
270 return 0;
271}
272
273static int skipn(int fd, off_t n)
274{
275 char buf[4096];
276 ssize_t ret;
277
278 while (n > 0) {
279 ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
280 if (ret <= 0)
281 return ret;
282 n -= ret;
283 }
284
285 return 0;
286}
287
288static s64 process_event_auxtrace_stub(struct perf_tool *tool __maybe_unused,
289 union perf_event *event,
290 struct perf_session *session
291 __maybe_unused)
292{
293 dump_printf(": unhandled!\n");
294 if (perf_data_file__is_pipe(session->file))
295 skipn(perf_data_file__fd(session->file), event->auxtrace.size);
296 return event->auxtrace.size;
297}
298
299static
300int process_event_auxtrace_error_stub(struct perf_tool *tool __maybe_unused,
301 union perf_event *event __maybe_unused,
302 struct perf_session *session __maybe_unused)
303{
304 dump_printf(": unhandled!\n");
305 return 0;
306}
307
308
309static
310int process_event_thread_map_stub(struct perf_tool *tool __maybe_unused,
311 union perf_event *event __maybe_unused,
312 struct perf_session *session __maybe_unused)
313{
314 dump_printf(": unhandled!\n");
315 return 0;
316}
317
318static
319int process_event_cpu_map_stub(struct perf_tool *tool __maybe_unused,
320 union perf_event *event __maybe_unused,
321 struct perf_session *session __maybe_unused)
322{
323 dump_printf(": unhandled!\n");
324 return 0;
325}
326
327static
328int process_event_stat_config_stub(struct perf_tool *tool __maybe_unused,
329 union perf_event *event __maybe_unused,
330 struct perf_session *session __maybe_unused)
331{
332 dump_printf(": unhandled!\n");
333 return 0;
334}
335
336static int process_stat_stub(struct perf_tool *tool __maybe_unused,
337 union perf_event *event __maybe_unused,
338 struct perf_session *perf_session
339 __maybe_unused)
340{
341 dump_printf(": unhandled!\n");
342 return 0;
343}
344
345static int process_stat_round_stub(struct perf_tool *tool __maybe_unused,
346 union perf_event *event __maybe_unused,
347 struct perf_session *perf_session
348 __maybe_unused)
349{
350 dump_printf(": unhandled!\n");
351 return 0;
352}
353
354void perf_tool__fill_defaults(struct perf_tool *tool)
355{
356 if (tool->sample == NULL)
357 tool->sample = process_event_sample_stub;
358 if (tool->mmap == NULL)
359 tool->mmap = process_event_stub;
360 if (tool->mmap2 == NULL)
361 tool->mmap2 = process_event_stub;
362 if (tool->comm == NULL)
363 tool->comm = process_event_stub;
364 if (tool->fork == NULL)
365 tool->fork = process_event_stub;
366 if (tool->exit == NULL)
367 tool->exit = process_event_stub;
368 if (tool->lost == NULL)
369 tool->lost = perf_event__process_lost;
370 if (tool->lost_samples == NULL)
371 tool->lost_samples = perf_event__process_lost_samples;
372 if (tool->aux == NULL)
373 tool->aux = perf_event__process_aux;
374 if (tool->itrace_start == NULL)
375 tool->itrace_start = perf_event__process_itrace_start;
376 if (tool->context_switch == NULL)
377 tool->context_switch = perf_event__process_switch;
378 if (tool->read == NULL)
379 tool->read = process_event_sample_stub;
380 if (tool->throttle == NULL)
381 tool->throttle = process_event_stub;
382 if (tool->unthrottle == NULL)
383 tool->unthrottle = process_event_stub;
384 if (tool->attr == NULL)
385 tool->attr = process_event_synth_attr_stub;
386 if (tool->event_update == NULL)
387 tool->event_update = process_event_synth_event_update_stub;
388 if (tool->tracing_data == NULL)
389 tool->tracing_data = process_event_synth_tracing_data_stub;
390 if (tool->build_id == NULL)
391 tool->build_id = process_build_id_stub;
392 if (tool->finished_round == NULL) {
393 if (tool->ordered_events)
394 tool->finished_round = process_finished_round;
395 else
396 tool->finished_round = process_finished_round_stub;
397 }
398 if (tool->id_index == NULL)
399 tool->id_index = process_id_index_stub;
400 if (tool->auxtrace_info == NULL)
401 tool->auxtrace_info = process_event_auxtrace_info_stub;
402 if (tool->auxtrace == NULL)
403 tool->auxtrace = process_event_auxtrace_stub;
404 if (tool->auxtrace_error == NULL)
405 tool->auxtrace_error = process_event_auxtrace_error_stub;
406 if (tool->thread_map == NULL)
407 tool->thread_map = process_event_thread_map_stub;
408 if (tool->cpu_map == NULL)
409 tool->cpu_map = process_event_cpu_map_stub;
410 if (tool->stat_config == NULL)
411 tool->stat_config = process_event_stat_config_stub;
412 if (tool->stat == NULL)
413 tool->stat = process_stat_stub;
414 if (tool->stat_round == NULL)
415 tool->stat_round = process_stat_round_stub;
416}
417
418static void swap_sample_id_all(union perf_event *event, void *data)
419{
420 void *end = (void *) event + event->header.size;
421 int size = end - data;
422
423 BUG_ON(size % sizeof(u64));
424 mem_bswap_64(data, size);
425}
426
427static void perf_event__all64_swap(union perf_event *event,
428 bool sample_id_all __maybe_unused)
429{
430 struct perf_event_header *hdr = &event->header;
431 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
432}
433
434static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
435{
436 event->comm.pid = bswap_32(event->comm.pid);
437 event->comm.tid = bswap_32(event->comm.tid);
438
439 if (sample_id_all) {
440 void *data = &event->comm.comm;
441
442 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
443 swap_sample_id_all(event, data);
444 }
445}
446
447static void perf_event__mmap_swap(union perf_event *event,
448 bool sample_id_all)
449{
450 event->mmap.pid = bswap_32(event->mmap.pid);
451 event->mmap.tid = bswap_32(event->mmap.tid);
452 event->mmap.start = bswap_64(event->mmap.start);
453 event->mmap.len = bswap_64(event->mmap.len);
454 event->mmap.pgoff = bswap_64(event->mmap.pgoff);
455
456 if (sample_id_all) {
457 void *data = &event->mmap.filename;
458
459 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
460 swap_sample_id_all(event, data);
461 }
462}
463
464static void perf_event__mmap2_swap(union perf_event *event,
465 bool sample_id_all)
466{
467 event->mmap2.pid = bswap_32(event->mmap2.pid);
468 event->mmap2.tid = bswap_32(event->mmap2.tid);
469 event->mmap2.start = bswap_64(event->mmap2.start);
470 event->mmap2.len = bswap_64(event->mmap2.len);
471 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
472 event->mmap2.maj = bswap_32(event->mmap2.maj);
473 event->mmap2.min = bswap_32(event->mmap2.min);
474 event->mmap2.ino = bswap_64(event->mmap2.ino);
475
476 if (sample_id_all) {
477 void *data = &event->mmap2.filename;
478
479 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
480 swap_sample_id_all(event, data);
481 }
482}
483static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
484{
485 event->fork.pid = bswap_32(event->fork.pid);
486 event->fork.tid = bswap_32(event->fork.tid);
487 event->fork.ppid = bswap_32(event->fork.ppid);
488 event->fork.ptid = bswap_32(event->fork.ptid);
489 event->fork.time = bswap_64(event->fork.time);
490
491 if (sample_id_all)
492 swap_sample_id_all(event, &event->fork + 1);
493}
494
495static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
496{
497 event->read.pid = bswap_32(event->read.pid);
498 event->read.tid = bswap_32(event->read.tid);
499 event->read.value = bswap_64(event->read.value);
500 event->read.time_enabled = bswap_64(event->read.time_enabled);
501 event->read.time_running = bswap_64(event->read.time_running);
502 event->read.id = bswap_64(event->read.id);
503
504 if (sample_id_all)
505 swap_sample_id_all(event, &event->read + 1);
506}
507
508static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
509{
510 event->aux.aux_offset = bswap_64(event->aux.aux_offset);
511 event->aux.aux_size = bswap_64(event->aux.aux_size);
512 event->aux.flags = bswap_64(event->aux.flags);
513
514 if (sample_id_all)
515 swap_sample_id_all(event, &event->aux + 1);
516}
517
518static void perf_event__itrace_start_swap(union perf_event *event,
519 bool sample_id_all)
520{
521 event->itrace_start.pid = bswap_32(event->itrace_start.pid);
522 event->itrace_start.tid = bswap_32(event->itrace_start.tid);
523
524 if (sample_id_all)
525 swap_sample_id_all(event, &event->itrace_start + 1);
526}
527
528static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
529{
530 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
531 event->context_switch.next_prev_pid =
532 bswap_32(event->context_switch.next_prev_pid);
533 event->context_switch.next_prev_tid =
534 bswap_32(event->context_switch.next_prev_tid);
535 }
536
537 if (sample_id_all)
538 swap_sample_id_all(event, &event->context_switch + 1);
539}
540
541static void perf_event__throttle_swap(union perf_event *event,
542 bool sample_id_all)
543{
544 event->throttle.time = bswap_64(event->throttle.time);
545 event->throttle.id = bswap_64(event->throttle.id);
546 event->throttle.stream_id = bswap_64(event->throttle.stream_id);
547
548 if (sample_id_all)
549 swap_sample_id_all(event, &event->throttle + 1);
550}
551
552static u8 revbyte(u8 b)
553{
554 int rev = (b >> 4) | ((b & 0xf) << 4);
555 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
556 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
557 return (u8) rev;
558}
559
560/*
561 * XXX this is hack in attempt to carry flags bitfield
562 * throught endian village. ABI says:
563 *
564 * Bit-fields are allocated from right to left (least to most significant)
565 * on little-endian implementations and from left to right (most to least
566 * significant) on big-endian implementations.
567 *
568 * The above seems to be byte specific, so we need to reverse each
569 * byte of the bitfield. 'Internet' also says this might be implementation
570 * specific and we probably need proper fix and carry perf_event_attr
571 * bitfield flags in separate data file FEAT_ section. Thought this seems
572 * to work for now.
573 */
574static void swap_bitfield(u8 *p, unsigned len)
575{
576 unsigned i;
577
578 for (i = 0; i < len; i++) {
579 *p = revbyte(*p);
580 p++;
581 }
582}
583
584/* exported for swapping attributes in file header */
585void perf_event__attr_swap(struct perf_event_attr *attr)
586{
587 attr->type = bswap_32(attr->type);
588 attr->size = bswap_32(attr->size);
589
590#define bswap_safe(f, n) \
591 (attr->size > (offsetof(struct perf_event_attr, f) + \
592 sizeof(attr->f) * (n)))
593#define bswap_field(f, sz) \
594do { \
595 if (bswap_safe(f, 0)) \
596 attr->f = bswap_##sz(attr->f); \
597} while(0)
598#define bswap_field_32(f) bswap_field(f, 32)
599#define bswap_field_64(f) bswap_field(f, 64)
600
601 bswap_field_64(config);
602 bswap_field_64(sample_period);
603 bswap_field_64(sample_type);
604 bswap_field_64(read_format);
605 bswap_field_32(wakeup_events);
606 bswap_field_32(bp_type);
607 bswap_field_64(bp_addr);
608 bswap_field_64(bp_len);
609 bswap_field_64(branch_sample_type);
610 bswap_field_64(sample_regs_user);
611 bswap_field_32(sample_stack_user);
612 bswap_field_32(aux_watermark);
613
614 /*
615 * After read_format are bitfields. Check read_format because
616 * we are unable to use offsetof on bitfield.
617 */
618 if (bswap_safe(read_format, 1))
619 swap_bitfield((u8 *) (&attr->read_format + 1),
620 sizeof(u64));
621#undef bswap_field_64
622#undef bswap_field_32
623#undef bswap_field
624#undef bswap_safe
625}
626
627static void perf_event__hdr_attr_swap(union perf_event *event,
628 bool sample_id_all __maybe_unused)
629{
630 size_t size;
631
632 perf_event__attr_swap(&event->attr.attr);
633
634 size = event->header.size;
635 size -= (void *)&event->attr.id - (void *)event;
636 mem_bswap_64(event->attr.id, size);
637}
638
639static void perf_event__event_update_swap(union perf_event *event,
640 bool sample_id_all __maybe_unused)
641{
642 event->event_update.type = bswap_64(event->event_update.type);
643 event->event_update.id = bswap_64(event->event_update.id);
644}
645
646static void perf_event__event_type_swap(union perf_event *event,
647 bool sample_id_all __maybe_unused)
648{
649 event->event_type.event_type.event_id =
650 bswap_64(event->event_type.event_type.event_id);
651}
652
653static void perf_event__tracing_data_swap(union perf_event *event,
654 bool sample_id_all __maybe_unused)
655{
656 event->tracing_data.size = bswap_32(event->tracing_data.size);
657}
658
659static void perf_event__auxtrace_info_swap(union perf_event *event,
660 bool sample_id_all __maybe_unused)
661{
662 size_t size;
663
664 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
665
666 size = event->header.size;
667 size -= (void *)&event->auxtrace_info.priv - (void *)event;
668 mem_bswap_64(event->auxtrace_info.priv, size);
669}
670
671static void perf_event__auxtrace_swap(union perf_event *event,
672 bool sample_id_all __maybe_unused)
673{
674 event->auxtrace.size = bswap_64(event->auxtrace.size);
675 event->auxtrace.offset = bswap_64(event->auxtrace.offset);
676 event->auxtrace.reference = bswap_64(event->auxtrace.reference);
677 event->auxtrace.idx = bswap_32(event->auxtrace.idx);
678 event->auxtrace.tid = bswap_32(event->auxtrace.tid);
679 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu);
680}
681
682static void perf_event__auxtrace_error_swap(union perf_event *event,
683 bool sample_id_all __maybe_unused)
684{
685 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
686 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
687 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu);
688 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid);
689 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid);
690 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip);
691}
692
693static void perf_event__thread_map_swap(union perf_event *event,
694 bool sample_id_all __maybe_unused)
695{
696 unsigned i;
697
698 event->thread_map.nr = bswap_64(event->thread_map.nr);
699
700 for (i = 0; i < event->thread_map.nr; i++)
701 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
702}
703
704static void perf_event__cpu_map_swap(union perf_event *event,
705 bool sample_id_all __maybe_unused)
706{
707 struct cpu_map_data *data = &event->cpu_map.data;
708 struct cpu_map_entries *cpus;
709 struct cpu_map_mask *mask;
710 unsigned i;
711
712 data->type = bswap_64(data->type);
713
714 switch (data->type) {
715 case PERF_CPU_MAP__CPUS:
716 cpus = (struct cpu_map_entries *)data->data;
717
718 cpus->nr = bswap_16(cpus->nr);
719
720 for (i = 0; i < cpus->nr; i++)
721 cpus->cpu[i] = bswap_16(cpus->cpu[i]);
722 break;
723 case PERF_CPU_MAP__MASK:
724 mask = (struct cpu_map_mask *) data->data;
725
726 mask->nr = bswap_16(mask->nr);
727 mask->long_size = bswap_16(mask->long_size);
728
729 switch (mask->long_size) {
730 case 4: mem_bswap_32(&mask->mask, mask->nr); break;
731 case 8: mem_bswap_64(&mask->mask, mask->nr); break;
732 default:
733 pr_err("cpu_map swap: unsupported long size\n");
734 }
735 default:
736 break;
737 }
738}
739
740static void perf_event__stat_config_swap(union perf_event *event,
741 bool sample_id_all __maybe_unused)
742{
743 u64 size;
744
745 size = event->stat_config.nr * sizeof(event->stat_config.data[0]);
746 size += 1; /* nr item itself */
747 mem_bswap_64(&event->stat_config.nr, size);
748}
749
750static void perf_event__stat_swap(union perf_event *event,
751 bool sample_id_all __maybe_unused)
752{
753 event->stat.id = bswap_64(event->stat.id);
754 event->stat.thread = bswap_32(event->stat.thread);
755 event->stat.cpu = bswap_32(event->stat.cpu);
756 event->stat.val = bswap_64(event->stat.val);
757 event->stat.ena = bswap_64(event->stat.ena);
758 event->stat.run = bswap_64(event->stat.run);
759}
760
761static void perf_event__stat_round_swap(union perf_event *event,
762 bool sample_id_all __maybe_unused)
763{
764 event->stat_round.type = bswap_64(event->stat_round.type);
765 event->stat_round.time = bswap_64(event->stat_round.time);
766}
767
768typedef void (*perf_event__swap_op)(union perf_event *event,
769 bool sample_id_all);
770
771static perf_event__swap_op perf_event__swap_ops[] = {
772 [PERF_RECORD_MMAP] = perf_event__mmap_swap,
773 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap,
774 [PERF_RECORD_COMM] = perf_event__comm_swap,
775 [PERF_RECORD_FORK] = perf_event__task_swap,
776 [PERF_RECORD_EXIT] = perf_event__task_swap,
777 [PERF_RECORD_LOST] = perf_event__all64_swap,
778 [PERF_RECORD_READ] = perf_event__read_swap,
779 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap,
780 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap,
781 [PERF_RECORD_SAMPLE] = perf_event__all64_swap,
782 [PERF_RECORD_AUX] = perf_event__aux_swap,
783 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap,
784 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap,
785 [PERF_RECORD_SWITCH] = perf_event__switch_swap,
786 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap,
787 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
788 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
789 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
790 [PERF_RECORD_HEADER_BUILD_ID] = NULL,
791 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap,
792 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap,
793 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap,
794 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap,
795 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap,
796 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap,
797 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap,
798 [PERF_RECORD_STAT] = perf_event__stat_swap,
799 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap,
800 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap,
801 [PERF_RECORD_HEADER_MAX] = NULL,
802};
803
804/*
805 * When perf record finishes a pass on every buffers, it records this pseudo
806 * event.
807 * We record the max timestamp t found in the pass n.
808 * Assuming these timestamps are monotonic across cpus, we know that if
809 * a buffer still has events with timestamps below t, they will be all
810 * available and then read in the pass n + 1.
811 * Hence when we start to read the pass n + 2, we can safely flush every
812 * events with timestamps below t.
813 *
814 * ============ PASS n =================
815 * CPU 0 | CPU 1
816 * |
817 * cnt1 timestamps | cnt2 timestamps
818 * 1 | 2
819 * 2 | 3
820 * - | 4 <--- max recorded
821 *
822 * ============ PASS n + 1 ==============
823 * CPU 0 | CPU 1
824 * |
825 * cnt1 timestamps | cnt2 timestamps
826 * 3 | 5
827 * 4 | 6
828 * 5 | 7 <---- max recorded
829 *
830 * Flush every events below timestamp 4
831 *
832 * ============ PASS n + 2 ==============
833 * CPU 0 | CPU 1
834 * |
835 * cnt1 timestamps | cnt2 timestamps
836 * 6 | 8
837 * 7 | 9
838 * - | 10
839 *
840 * Flush every events below timestamp 7
841 * etc...
842 */
843static int process_finished_round(struct perf_tool *tool __maybe_unused,
844 union perf_event *event __maybe_unused,
845 struct ordered_events *oe)
846{
847 if (dump_trace)
848 fprintf(stdout, "\n");
849 return ordered_events__flush(oe, OE_FLUSH__ROUND);
850}
851
852int perf_session__queue_event(struct perf_session *s, union perf_event *event,
853 struct perf_sample *sample, u64 file_offset)
854{
855 return ordered_events__queue(&s->ordered_events, event, sample, file_offset);
856}
857
858static void callchain__lbr_callstack_printf(struct perf_sample *sample)
859{
860 struct ip_callchain *callchain = sample->callchain;
861 struct branch_stack *lbr_stack = sample->branch_stack;
862 u64 kernel_callchain_nr = callchain->nr;
863 unsigned int i;
864
865 for (i = 0; i < kernel_callchain_nr; i++) {
866 if (callchain->ips[i] == PERF_CONTEXT_USER)
867 break;
868 }
869
870 if ((i != kernel_callchain_nr) && lbr_stack->nr) {
871 u64 total_nr;
872 /*
873 * LBR callstack can only get user call chain,
874 * i is kernel call chain number,
875 * 1 is PERF_CONTEXT_USER.
876 *
877 * The user call chain is stored in LBR registers.
878 * LBR are pair registers. The caller is stored
879 * in "from" register, while the callee is stored
880 * in "to" register.
881 * For example, there is a call stack
882 * "A"->"B"->"C"->"D".
883 * The LBR registers will recorde like
884 * "C"->"D", "B"->"C", "A"->"B".
885 * So only the first "to" register and all "from"
886 * registers are needed to construct the whole stack.
887 */
888 total_nr = i + 1 + lbr_stack->nr + 1;
889 kernel_callchain_nr = i + 1;
890
891 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
892
893 for (i = 0; i < kernel_callchain_nr; i++)
894 printf("..... %2d: %016" PRIx64 "\n",
895 i, callchain->ips[i]);
896
897 printf("..... %2d: %016" PRIx64 "\n",
898 (int)(kernel_callchain_nr), lbr_stack->entries[0].to);
899 for (i = 0; i < lbr_stack->nr; i++)
900 printf("..... %2d: %016" PRIx64 "\n",
901 (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from);
902 }
903}
904
905static void callchain__printf(struct perf_evsel *evsel,
906 struct perf_sample *sample)
907{
908 unsigned int i;
909 struct ip_callchain *callchain = sample->callchain;
910
911 if (has_branch_callstack(evsel))
912 callchain__lbr_callstack_printf(sample);
913
914 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
915
916 for (i = 0; i < callchain->nr; i++)
917 printf("..... %2d: %016" PRIx64 "\n",
918 i, callchain->ips[i]);
919}
920
921static void branch_stack__printf(struct perf_sample *sample)
922{
923 uint64_t i;
924
925 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
926
927 for (i = 0; i < sample->branch_stack->nr; i++) {
928 struct branch_entry *e = &sample->branch_stack->entries[i];
929
930 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n",
931 i, e->from, e->to,
932 e->flags.cycles,
933 e->flags.mispred ? "M" : " ",
934 e->flags.predicted ? "P" : " ",
935 e->flags.abort ? "A" : " ",
936 e->flags.in_tx ? "T" : " ",
937 (unsigned)e->flags.reserved);
938 }
939}
940
941static void regs_dump__printf(u64 mask, u64 *regs)
942{
943 unsigned rid, i = 0;
944
945 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
946 u64 val = regs[i++];
947
948 printf(".... %-5s 0x%" PRIx64 "\n",
949 perf_reg_name(rid), val);
950 }
951}
952
953static const char *regs_abi[] = {
954 [PERF_SAMPLE_REGS_ABI_NONE] = "none",
955 [PERF_SAMPLE_REGS_ABI_32] = "32-bit",
956 [PERF_SAMPLE_REGS_ABI_64] = "64-bit",
957};
958
959static inline const char *regs_dump_abi(struct regs_dump *d)
960{
961 if (d->abi > PERF_SAMPLE_REGS_ABI_64)
962 return "unknown";
963
964 return regs_abi[d->abi];
965}
966
967static void regs__printf(const char *type, struct regs_dump *regs)
968{
969 u64 mask = regs->mask;
970
971 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
972 type,
973 mask,
974 regs_dump_abi(regs));
975
976 regs_dump__printf(mask, regs->regs);
977}
978
979static void regs_user__printf(struct perf_sample *sample)
980{
981 struct regs_dump *user_regs = &sample->user_regs;
982
983 if (user_regs->regs)
984 regs__printf("user", user_regs);
985}
986
987static void regs_intr__printf(struct perf_sample *sample)
988{
989 struct regs_dump *intr_regs = &sample->intr_regs;
990
991 if (intr_regs->regs)
992 regs__printf("intr", intr_regs);
993}
994
995static void stack_user__printf(struct stack_dump *dump)
996{
997 printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
998 dump->size, dump->offset);
999}
1000
1001static void perf_evlist__print_tstamp(struct perf_evlist *evlist,
1002 union perf_event *event,
1003 struct perf_sample *sample)
1004{
1005 u64 sample_type = __perf_evlist__combined_sample_type(evlist);
1006
1007 if (event->header.type != PERF_RECORD_SAMPLE &&
1008 !perf_evlist__sample_id_all(evlist)) {
1009 fputs("-1 -1 ", stdout);
1010 return;
1011 }
1012
1013 if ((sample_type & PERF_SAMPLE_CPU))
1014 printf("%u ", sample->cpu);
1015
1016 if (sample_type & PERF_SAMPLE_TIME)
1017 printf("%" PRIu64 " ", sample->time);
1018}
1019
1020static void sample_read__printf(struct perf_sample *sample, u64 read_format)
1021{
1022 printf("... sample_read:\n");
1023
1024 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1025 printf("...... time enabled %016" PRIx64 "\n",
1026 sample->read.time_enabled);
1027
1028 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1029 printf("...... time running %016" PRIx64 "\n",
1030 sample->read.time_running);
1031
1032 if (read_format & PERF_FORMAT_GROUP) {
1033 u64 i;
1034
1035 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
1036
1037 for (i = 0; i < sample->read.group.nr; i++) {
1038 struct sample_read_value *value;
1039
1040 value = &sample->read.group.values[i];
1041 printf("..... id %016" PRIx64
1042 ", value %016" PRIx64 "\n",
1043 value->id, value->value);
1044 }
1045 } else
1046 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
1047 sample->read.one.id, sample->read.one.value);
1048}
1049
1050static void dump_event(struct perf_evlist *evlist, union perf_event *event,
1051 u64 file_offset, struct perf_sample *sample)
1052{
1053 if (!dump_trace)
1054 return;
1055
1056 printf("\n%#" PRIx64 " [%#x]: event: %d\n",
1057 file_offset, event->header.size, event->header.type);
1058
1059 trace_event(event);
1060
1061 if (sample)
1062 perf_evlist__print_tstamp(evlist, event, sample);
1063
1064 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
1065 event->header.size, perf_event__name(event->header.type));
1066}
1067
1068static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
1069 struct perf_sample *sample)
1070{
1071 u64 sample_type;
1072
1073 if (!dump_trace)
1074 return;
1075
1076 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
1077 event->header.misc, sample->pid, sample->tid, sample->ip,
1078 sample->period, sample->addr);
1079
1080 sample_type = evsel->attr.sample_type;
1081
1082 if (sample_type & PERF_SAMPLE_CALLCHAIN)
1083 callchain__printf(evsel, sample);
1084
1085 if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !has_branch_callstack(evsel))
1086 branch_stack__printf(sample);
1087
1088 if (sample_type & PERF_SAMPLE_REGS_USER)
1089 regs_user__printf(sample);
1090
1091 if (sample_type & PERF_SAMPLE_REGS_INTR)
1092 regs_intr__printf(sample);
1093
1094 if (sample_type & PERF_SAMPLE_STACK_USER)
1095 stack_user__printf(&sample->user_stack);
1096
1097 if (sample_type & PERF_SAMPLE_WEIGHT)
1098 printf("... weight: %" PRIu64 "\n", sample->weight);
1099
1100 if (sample_type & PERF_SAMPLE_DATA_SRC)
1101 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
1102
1103 if (sample_type & PERF_SAMPLE_TRANSACTION)
1104 printf("... transaction: %" PRIx64 "\n", sample->transaction);
1105
1106 if (sample_type & PERF_SAMPLE_READ)
1107 sample_read__printf(sample, evsel->attr.read_format);
1108}
1109
1110static struct machine *machines__find_for_cpumode(struct machines *machines,
1111 union perf_event *event,
1112 struct perf_sample *sample)
1113{
1114 const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1115 struct machine *machine;
1116
1117 if (perf_guest &&
1118 ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1119 (cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1120 u32 pid;
1121
1122 if (event->header.type == PERF_RECORD_MMAP
1123 || event->header.type == PERF_RECORD_MMAP2)
1124 pid = event->mmap.pid;
1125 else
1126 pid = sample->pid;
1127
1128 machine = machines__find(machines, pid);
1129 if (!machine)
1130 machine = machines__find(machines, DEFAULT_GUEST_KERNEL_ID);
1131 return machine;
1132 }
1133
1134 return &machines->host;
1135}
1136
1137static int deliver_sample_value(struct perf_evlist *evlist,
1138 struct perf_tool *tool,
1139 union perf_event *event,
1140 struct perf_sample *sample,
1141 struct sample_read_value *v,
1142 struct machine *machine)
1143{
1144 struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
1145
1146 if (sid) {
1147 sample->id = v->id;
1148 sample->period = v->value - sid->period;
1149 sid->period = v->value;
1150 }
1151
1152 if (!sid || sid->evsel == NULL) {
1153 ++evlist->stats.nr_unknown_id;
1154 return 0;
1155 }
1156
1157 return tool->sample(tool, event, sample, sid->evsel, machine);
1158}
1159
1160static int deliver_sample_group(struct perf_evlist *evlist,
1161 struct perf_tool *tool,
1162 union perf_event *event,
1163 struct perf_sample *sample,
1164 struct machine *machine)
1165{
1166 int ret = -EINVAL;
1167 u64 i;
1168
1169 for (i = 0; i < sample->read.group.nr; i++) {
1170 ret = deliver_sample_value(evlist, tool, event, sample,
1171 &sample->read.group.values[i],
1172 machine);
1173 if (ret)
1174 break;
1175 }
1176
1177 return ret;
1178}
1179
1180static int
1181 perf_evlist__deliver_sample(struct perf_evlist *evlist,
1182 struct perf_tool *tool,
1183 union perf_event *event,
1184 struct perf_sample *sample,
1185 struct perf_evsel *evsel,
1186 struct machine *machine)
1187{
1188 /* We know evsel != NULL. */
1189 u64 sample_type = evsel->attr.sample_type;
1190 u64 read_format = evsel->attr.read_format;
1191
1192 /* Standard sample delievery. */
1193 if (!(sample_type & PERF_SAMPLE_READ))
1194 return tool->sample(tool, event, sample, evsel, machine);
1195
1196 /* For PERF_SAMPLE_READ we have either single or group mode. */
1197 if (read_format & PERF_FORMAT_GROUP)
1198 return deliver_sample_group(evlist, tool, event, sample,
1199 machine);
1200 else
1201 return deliver_sample_value(evlist, tool, event, sample,
1202 &sample->read.one, machine);
1203}
1204
1205static int machines__deliver_event(struct machines *machines,
1206 struct perf_evlist *evlist,
1207 union perf_event *event,
1208 struct perf_sample *sample,
1209 struct perf_tool *tool, u64 file_offset)
1210{
1211 struct perf_evsel *evsel;
1212 struct machine *machine;
1213
1214 dump_event(evlist, event, file_offset, sample);
1215
1216 evsel = perf_evlist__id2evsel(evlist, sample->id);
1217
1218 machine = machines__find_for_cpumode(machines, event, sample);
1219
1220 switch (event->header.type) {
1221 case PERF_RECORD_SAMPLE:
1222 if (evsel == NULL) {
1223 ++evlist->stats.nr_unknown_id;
1224 return 0;
1225 }
1226 dump_sample(evsel, event, sample);
1227 if (machine == NULL) {
1228 ++evlist->stats.nr_unprocessable_samples;
1229 return 0;
1230 }
1231 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1232 case PERF_RECORD_MMAP:
1233 return tool->mmap(tool, event, sample, machine);
1234 case PERF_RECORD_MMAP2:
1235 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1236 ++evlist->stats.nr_proc_map_timeout;
1237 return tool->mmap2(tool, event, sample, machine);
1238 case PERF_RECORD_COMM:
1239 return tool->comm(tool, event, sample, machine);
1240 case PERF_RECORD_FORK:
1241 return tool->fork(tool, event, sample, machine);
1242 case PERF_RECORD_EXIT:
1243 return tool->exit(tool, event, sample, machine);
1244 case PERF_RECORD_LOST:
1245 if (tool->lost == perf_event__process_lost)
1246 evlist->stats.total_lost += event->lost.lost;
1247 return tool->lost(tool, event, sample, machine);
1248 case PERF_RECORD_LOST_SAMPLES:
1249 if (tool->lost_samples == perf_event__process_lost_samples)
1250 evlist->stats.total_lost_samples += event->lost_samples.lost;
1251 return tool->lost_samples(tool, event, sample, machine);
1252 case PERF_RECORD_READ:
1253 return tool->read(tool, event, sample, evsel, machine);
1254 case PERF_RECORD_THROTTLE:
1255 return tool->throttle(tool, event, sample, machine);
1256 case PERF_RECORD_UNTHROTTLE:
1257 return tool->unthrottle(tool, event, sample, machine);
1258 case PERF_RECORD_AUX:
1259 if (tool->aux == perf_event__process_aux &&
1260 (event->aux.flags & PERF_AUX_FLAG_TRUNCATED))
1261 evlist->stats.total_aux_lost += 1;
1262 return tool->aux(tool, event, sample, machine);
1263 case PERF_RECORD_ITRACE_START:
1264 return tool->itrace_start(tool, event, sample, machine);
1265 case PERF_RECORD_SWITCH:
1266 case PERF_RECORD_SWITCH_CPU_WIDE:
1267 return tool->context_switch(tool, event, sample, machine);
1268 default:
1269 ++evlist->stats.nr_unknown_events;
1270 return -1;
1271 }
1272}
1273
1274static int perf_session__deliver_event(struct perf_session *session,
1275 union perf_event *event,
1276 struct perf_sample *sample,
1277 struct perf_tool *tool,
1278 u64 file_offset)
1279{
1280 int ret;
1281
1282 ret = auxtrace__process_event(session, event, sample, tool);
1283 if (ret < 0)
1284 return ret;
1285 if (ret > 0)
1286 return 0;
1287
1288 return machines__deliver_event(&session->machines, session->evlist,
1289 event, sample, tool, file_offset);
1290}
1291
1292static s64 perf_session__process_user_event(struct perf_session *session,
1293 union perf_event *event,
1294 u64 file_offset)
1295{
1296 struct ordered_events *oe = &session->ordered_events;
1297 struct perf_tool *tool = session->tool;
1298 int fd = perf_data_file__fd(session->file);
1299 int err;
1300
1301 dump_event(session->evlist, event, file_offset, NULL);
1302
1303 /* These events are processed right away */
1304 switch (event->header.type) {
1305 case PERF_RECORD_HEADER_ATTR:
1306 err = tool->attr(tool, event, &session->evlist);
1307 if (err == 0) {
1308 perf_session__set_id_hdr_size(session);
1309 perf_session__set_comm_exec(session);
1310 }
1311 return err;
1312 case PERF_RECORD_EVENT_UPDATE:
1313 return tool->event_update(tool, event, &session->evlist);
1314 case PERF_RECORD_HEADER_EVENT_TYPE:
1315 /*
1316 * Depreceated, but we need to handle it for sake
1317 * of old data files create in pipe mode.
1318 */
1319 return 0;
1320 case PERF_RECORD_HEADER_TRACING_DATA:
1321 /* setup for reading amidst mmap */
1322 lseek(fd, file_offset, SEEK_SET);
1323 return tool->tracing_data(tool, event, session);
1324 case PERF_RECORD_HEADER_BUILD_ID:
1325 return tool->build_id(tool, event, session);
1326 case PERF_RECORD_FINISHED_ROUND:
1327 return tool->finished_round(tool, event, oe);
1328 case PERF_RECORD_ID_INDEX:
1329 return tool->id_index(tool, event, session);
1330 case PERF_RECORD_AUXTRACE_INFO:
1331 return tool->auxtrace_info(tool, event, session);
1332 case PERF_RECORD_AUXTRACE:
1333 /* setup for reading amidst mmap */
1334 lseek(fd, file_offset + event->header.size, SEEK_SET);
1335 return tool->auxtrace(tool, event, session);
1336 case PERF_RECORD_AUXTRACE_ERROR:
1337 perf_session__auxtrace_error_inc(session, event);
1338 return tool->auxtrace_error(tool, event, session);
1339 case PERF_RECORD_THREAD_MAP:
1340 return tool->thread_map(tool, event, session);
1341 case PERF_RECORD_CPU_MAP:
1342 return tool->cpu_map(tool, event, session);
1343 case PERF_RECORD_STAT_CONFIG:
1344 return tool->stat_config(tool, event, session);
1345 case PERF_RECORD_STAT:
1346 return tool->stat(tool, event, session);
1347 case PERF_RECORD_STAT_ROUND:
1348 return tool->stat_round(tool, event, session);
1349 default:
1350 return -EINVAL;
1351 }
1352}
1353
1354int perf_session__deliver_synth_event(struct perf_session *session,
1355 union perf_event *event,
1356 struct perf_sample *sample)
1357{
1358 struct perf_evlist *evlist = session->evlist;
1359 struct perf_tool *tool = session->tool;
1360
1361 events_stats__inc(&evlist->stats, event->header.type);
1362
1363 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1364 return perf_session__process_user_event(session, event, 0);
1365
1366 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0);
1367}
1368
1369static void event_swap(union perf_event *event, bool sample_id_all)
1370{
1371 perf_event__swap_op swap;
1372
1373 swap = perf_event__swap_ops[event->header.type];
1374 if (swap)
1375 swap(event, sample_id_all);
1376}
1377
1378int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1379 void *buf, size_t buf_sz,
1380 union perf_event **event_ptr,
1381 struct perf_sample *sample)
1382{
1383 union perf_event *event;
1384 size_t hdr_sz, rest;
1385 int fd;
1386
1387 if (session->one_mmap && !session->header.needs_swap) {
1388 event = file_offset - session->one_mmap_offset +
1389 session->one_mmap_addr;
1390 goto out_parse_sample;
1391 }
1392
1393 if (perf_data_file__is_pipe(session->file))
1394 return -1;
1395
1396 fd = perf_data_file__fd(session->file);
1397 hdr_sz = sizeof(struct perf_event_header);
1398
1399 if (buf_sz < hdr_sz)
1400 return -1;
1401
1402 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1403 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1404 return -1;
1405
1406 event = (union perf_event *)buf;
1407
1408 if (session->header.needs_swap)
1409 perf_event_header__bswap(&event->header);
1410
1411 if (event->header.size < hdr_sz || event->header.size > buf_sz)
1412 return -1;
1413
1414 rest = event->header.size - hdr_sz;
1415
1416 if (readn(fd, buf, rest) != (ssize_t)rest)
1417 return -1;
1418
1419 if (session->header.needs_swap)
1420 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1421
1422out_parse_sample:
1423
1424 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1425 perf_evlist__parse_sample(session->evlist, event, sample))
1426 return -1;
1427
1428 *event_ptr = event;
1429
1430 return 0;
1431}
1432
1433static s64 perf_session__process_event(struct perf_session *session,
1434 union perf_event *event, u64 file_offset)
1435{
1436 struct perf_evlist *evlist = session->evlist;
1437 struct perf_tool *tool = session->tool;
1438 struct perf_sample sample;
1439 int ret;
1440
1441 if (session->header.needs_swap)
1442 event_swap(event, perf_evlist__sample_id_all(evlist));
1443
1444 if (event->header.type >= PERF_RECORD_HEADER_MAX)
1445 return -EINVAL;
1446
1447 events_stats__inc(&evlist->stats, event->header.type);
1448
1449 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1450 return perf_session__process_user_event(session, event, file_offset);
1451
1452 /*
1453 * For all kernel events we get the sample data
1454 */
1455 ret = perf_evlist__parse_sample(evlist, event, &sample);
1456 if (ret)
1457 return ret;
1458
1459 if (tool->ordered_events) {
1460 ret = perf_session__queue_event(session, event, &sample, file_offset);
1461 if (ret != -ETIME)
1462 return ret;
1463 }
1464
1465 return perf_session__deliver_event(session, event, &sample, tool,
1466 file_offset);
1467}
1468
1469void perf_event_header__bswap(struct perf_event_header *hdr)
1470{
1471 hdr->type = bswap_32(hdr->type);
1472 hdr->misc = bswap_16(hdr->misc);
1473 hdr->size = bswap_16(hdr->size);
1474}
1475
1476struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1477{
1478 return machine__findnew_thread(&session->machines.host, -1, pid);
1479}
1480
1481int perf_session__register_idle_thread(struct perf_session *session)
1482{
1483 struct thread *thread;
1484 int err = 0;
1485
1486 thread = machine__findnew_thread(&session->machines.host, 0, 0);
1487 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1488 pr_err("problem inserting idle task.\n");
1489 err = -1;
1490 }
1491
1492 /* machine__findnew_thread() got the thread, so put it */
1493 thread__put(thread);
1494 return err;
1495}
1496
1497static void perf_session__warn_about_errors(const struct perf_session *session)
1498{
1499 const struct events_stats *stats = &session->evlist->stats;
1500 const struct ordered_events *oe = &session->ordered_events;
1501
1502 if (session->tool->lost == perf_event__process_lost &&
1503 stats->nr_events[PERF_RECORD_LOST] != 0) {
1504 ui__warning("Processed %d events and lost %d chunks!\n\n"
1505 "Check IO/CPU overload!\n\n",
1506 stats->nr_events[0],
1507 stats->nr_events[PERF_RECORD_LOST]);
1508 }
1509
1510 if (session->tool->lost_samples == perf_event__process_lost_samples) {
1511 double drop_rate;
1512
1513 drop_rate = (double)stats->total_lost_samples /
1514 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1515 if (drop_rate > 0.05) {
1516 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%% samples!\n\n",
1517 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1518 drop_rate * 100.0);
1519 }
1520 }
1521
1522 if (session->tool->aux == perf_event__process_aux &&
1523 stats->total_aux_lost != 0) {
1524 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1525 stats->total_aux_lost,
1526 stats->nr_events[PERF_RECORD_AUX]);
1527 }
1528
1529 if (stats->nr_unknown_events != 0) {
1530 ui__warning("Found %u unknown events!\n\n"
1531 "Is this an older tool processing a perf.data "
1532 "file generated by a more recent tool?\n\n"
1533 "If that is not the case, consider "
1534 "reporting to linux-kernel@vger.kernel.org.\n\n",
1535 stats->nr_unknown_events);
1536 }
1537
1538 if (stats->nr_unknown_id != 0) {
1539 ui__warning("%u samples with id not present in the header\n",
1540 stats->nr_unknown_id);
1541 }
1542
1543 if (stats->nr_invalid_chains != 0) {
1544 ui__warning("Found invalid callchains!\n\n"
1545 "%u out of %u events were discarded for this reason.\n\n"
1546 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1547 stats->nr_invalid_chains,
1548 stats->nr_events[PERF_RECORD_SAMPLE]);
1549 }
1550
1551 if (stats->nr_unprocessable_samples != 0) {
1552 ui__warning("%u unprocessable samples recorded.\n"
1553 "Do you have a KVM guest running and not using 'perf kvm'?\n",
1554 stats->nr_unprocessable_samples);
1555 }
1556
1557 if (oe->nr_unordered_events != 0)
1558 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1559
1560 events_stats__auxtrace_error_warn(stats);
1561
1562 if (stats->nr_proc_map_timeout != 0) {
1563 ui__warning("%d map information files for pre-existing threads were\n"
1564 "not processed, if there are samples for addresses they\n"
1565 "will not be resolved, you may find out which are these\n"
1566 "threads by running with -v and redirecting the output\n"
1567 "to a file.\n"
1568 "The time limit to process proc map is too short?\n"
1569 "Increase it by --proc-map-timeout\n",
1570 stats->nr_proc_map_timeout);
1571 }
1572}
1573
1574static int perf_session__flush_thread_stack(struct thread *thread,
1575 void *p __maybe_unused)
1576{
1577 return thread_stack__flush(thread);
1578}
1579
1580static int perf_session__flush_thread_stacks(struct perf_session *session)
1581{
1582 return machines__for_each_thread(&session->machines,
1583 perf_session__flush_thread_stack,
1584 NULL);
1585}
1586
1587volatile int session_done;
1588
1589static int __perf_session__process_pipe_events(struct perf_session *session)
1590{
1591 struct ordered_events *oe = &session->ordered_events;
1592 struct perf_tool *tool = session->tool;
1593 int fd = perf_data_file__fd(session->file);
1594 union perf_event *event;
1595 uint32_t size, cur_size = 0;
1596 void *buf = NULL;
1597 s64 skip = 0;
1598 u64 head;
1599 ssize_t err;
1600 void *p;
1601
1602 perf_tool__fill_defaults(tool);
1603
1604 head = 0;
1605 cur_size = sizeof(union perf_event);
1606
1607 buf = malloc(cur_size);
1608 if (!buf)
1609 return -errno;
1610more:
1611 event = buf;
1612 err = readn(fd, event, sizeof(struct perf_event_header));
1613 if (err <= 0) {
1614 if (err == 0)
1615 goto done;
1616
1617 pr_err("failed to read event header\n");
1618 goto out_err;
1619 }
1620
1621 if (session->header.needs_swap)
1622 perf_event_header__bswap(&event->header);
1623
1624 size = event->header.size;
1625 if (size < sizeof(struct perf_event_header)) {
1626 pr_err("bad event header size\n");
1627 goto out_err;
1628 }
1629
1630 if (size > cur_size) {
1631 void *new = realloc(buf, size);
1632 if (!new) {
1633 pr_err("failed to allocate memory to read event\n");
1634 goto out_err;
1635 }
1636 buf = new;
1637 cur_size = size;
1638 event = buf;
1639 }
1640 p = event;
1641 p += sizeof(struct perf_event_header);
1642
1643 if (size - sizeof(struct perf_event_header)) {
1644 err = readn(fd, p, size - sizeof(struct perf_event_header));
1645 if (err <= 0) {
1646 if (err == 0) {
1647 pr_err("unexpected end of event stream\n");
1648 goto done;
1649 }
1650
1651 pr_err("failed to read event data\n");
1652 goto out_err;
1653 }
1654 }
1655
1656 if ((skip = perf_session__process_event(session, event, head)) < 0) {
1657 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1658 head, event->header.size, event->header.type);
1659 err = -EINVAL;
1660 goto out_err;
1661 }
1662
1663 head += size;
1664
1665 if (skip > 0)
1666 head += skip;
1667
1668 if (!session_done())
1669 goto more;
1670done:
1671 /* do the final flush for ordered samples */
1672 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1673 if (err)
1674 goto out_err;
1675 err = auxtrace__flush_events(session, tool);
1676 if (err)
1677 goto out_err;
1678 err = perf_session__flush_thread_stacks(session);
1679out_err:
1680 free(buf);
1681 perf_session__warn_about_errors(session);
1682 ordered_events__free(&session->ordered_events);
1683 auxtrace__free_events(session);
1684 return err;
1685}
1686
1687static union perf_event *
1688fetch_mmaped_event(struct perf_session *session,
1689 u64 head, size_t mmap_size, char *buf)
1690{
1691 union perf_event *event;
1692
1693 /*
1694 * Ensure we have enough space remaining to read
1695 * the size of the event in the headers.
1696 */
1697 if (head + sizeof(event->header) > mmap_size)
1698 return NULL;
1699
1700 event = (union perf_event *)(buf + head);
1701
1702 if (session->header.needs_swap)
1703 perf_event_header__bswap(&event->header);
1704
1705 if (head + event->header.size > mmap_size) {
1706 /* We're not fetching the event so swap back again */
1707 if (session->header.needs_swap)
1708 perf_event_header__bswap(&event->header);
1709 return NULL;
1710 }
1711
1712 return event;
1713}
1714
1715/*
1716 * On 64bit we can mmap the data file in one go. No need for tiny mmap
1717 * slices. On 32bit we use 32MB.
1718 */
1719#if BITS_PER_LONG == 64
1720#define MMAP_SIZE ULLONG_MAX
1721#define NUM_MMAPS 1
1722#else
1723#define MMAP_SIZE (32 * 1024 * 1024ULL)
1724#define NUM_MMAPS 128
1725#endif
1726
1727static int __perf_session__process_events(struct perf_session *session,
1728 u64 data_offset, u64 data_size,
1729 u64 file_size)
1730{
1731 struct ordered_events *oe = &session->ordered_events;
1732 struct perf_tool *tool = session->tool;
1733 int fd = perf_data_file__fd(session->file);
1734 u64 head, page_offset, file_offset, file_pos, size;
1735 int err, mmap_prot, mmap_flags, map_idx = 0;
1736 size_t mmap_size;
1737 char *buf, *mmaps[NUM_MMAPS];
1738 union perf_event *event;
1739 struct ui_progress prog;
1740 s64 skip;
1741
1742 perf_tool__fill_defaults(tool);
1743
1744 page_offset = page_size * (data_offset / page_size);
1745 file_offset = page_offset;
1746 head = data_offset - page_offset;
1747
1748 if (data_size == 0)
1749 goto out;
1750
1751 if (data_offset + data_size < file_size)
1752 file_size = data_offset + data_size;
1753
1754 ui_progress__init(&prog, file_size, "Processing events...");
1755
1756 mmap_size = MMAP_SIZE;
1757 if (mmap_size > file_size) {
1758 mmap_size = file_size;
1759 session->one_mmap = true;
1760 }
1761
1762 memset(mmaps, 0, sizeof(mmaps));
1763
1764 mmap_prot = PROT_READ;
1765 mmap_flags = MAP_SHARED;
1766
1767 if (session->header.needs_swap) {
1768 mmap_prot |= PROT_WRITE;
1769 mmap_flags = MAP_PRIVATE;
1770 }
1771remap:
1772 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1773 file_offset);
1774 if (buf == MAP_FAILED) {
1775 pr_err("failed to mmap file\n");
1776 err = -errno;
1777 goto out_err;
1778 }
1779 mmaps[map_idx] = buf;
1780 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1781 file_pos = file_offset + head;
1782 if (session->one_mmap) {
1783 session->one_mmap_addr = buf;
1784 session->one_mmap_offset = file_offset;
1785 }
1786
1787more:
1788 event = fetch_mmaped_event(session, head, mmap_size, buf);
1789 if (!event) {
1790 if (mmaps[map_idx]) {
1791 munmap(mmaps[map_idx], mmap_size);
1792 mmaps[map_idx] = NULL;
1793 }
1794
1795 page_offset = page_size * (head / page_size);
1796 file_offset += page_offset;
1797 head -= page_offset;
1798 goto remap;
1799 }
1800
1801 size = event->header.size;
1802
1803 if (size < sizeof(struct perf_event_header) ||
1804 (skip = perf_session__process_event(session, event, file_pos)) < 0) {
1805 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1806 file_offset + head, event->header.size,
1807 event->header.type);
1808 err = -EINVAL;
1809 goto out_err;
1810 }
1811
1812 if (skip)
1813 size += skip;
1814
1815 head += size;
1816 file_pos += size;
1817
1818 ui_progress__update(&prog, size);
1819
1820 if (session_done())
1821 goto out;
1822
1823 if (file_pos < file_size)
1824 goto more;
1825
1826out:
1827 /* do the final flush for ordered samples */
1828 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1829 if (err)
1830 goto out_err;
1831 err = auxtrace__flush_events(session, tool);
1832 if (err)
1833 goto out_err;
1834 err = perf_session__flush_thread_stacks(session);
1835out_err:
1836 ui_progress__finish();
1837 perf_session__warn_about_errors(session);
1838 ordered_events__free(&session->ordered_events);
1839 auxtrace__free_events(session);
1840 session->one_mmap = false;
1841 return err;
1842}
1843
1844int perf_session__process_events(struct perf_session *session)
1845{
1846 u64 size = perf_data_file__size(session->file);
1847 int err;
1848
1849 if (perf_session__register_idle_thread(session) < 0)
1850 return -ENOMEM;
1851
1852 if (!perf_data_file__is_pipe(session->file))
1853 err = __perf_session__process_events(session,
1854 session->header.data_offset,
1855 session->header.data_size, size);
1856 else
1857 err = __perf_session__process_pipe_events(session);
1858
1859 return err;
1860}
1861
1862bool perf_session__has_traces(struct perf_session *session, const char *msg)
1863{
1864 struct perf_evsel *evsel;
1865
1866 evlist__for_each(session->evlist, evsel) {
1867 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1868 return true;
1869 }
1870
1871 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1872 return false;
1873}
1874
1875int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1876 const char *symbol_name, u64 addr)
1877{
1878 char *bracket;
1879 enum map_type i;
1880 struct ref_reloc_sym *ref;
1881
1882 ref = zalloc(sizeof(struct ref_reloc_sym));
1883 if (ref == NULL)
1884 return -ENOMEM;
1885
1886 ref->name = strdup(symbol_name);
1887 if (ref->name == NULL) {
1888 free(ref);
1889 return -ENOMEM;
1890 }
1891
1892 bracket = strchr(ref->name, ']');
1893 if (bracket)
1894 *bracket = '\0';
1895
1896 ref->addr = addr;
1897
1898 for (i = 0; i < MAP__NR_TYPES; ++i) {
1899 struct kmap *kmap = map__kmap(maps[i]);
1900
1901 if (!kmap)
1902 continue;
1903 kmap->ref_reloc_sym = ref;
1904 }
1905
1906 return 0;
1907}
1908
1909size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
1910{
1911 return machines__fprintf_dsos(&session->machines, fp);
1912}
1913
1914size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
1915 bool (skip)(struct dso *dso, int parm), int parm)
1916{
1917 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
1918}
1919
1920size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1921{
1922 size_t ret;
1923 const char *msg = "";
1924
1925 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
1926 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
1927
1928 ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
1929
1930 ret += events_stats__fprintf(&session->evlist->stats, fp);
1931 return ret;
1932}
1933
1934size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1935{
1936 /*
1937 * FIXME: Here we have to actually print all the machines in this
1938 * session, not just the host...
1939 */
1940 return machine__fprintf(&session->machines.host, fp);
1941}
1942
1943struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1944 unsigned int type)
1945{
1946 struct perf_evsel *pos;
1947
1948 evlist__for_each(session->evlist, pos) {
1949 if (pos->attr.type == type)
1950 return pos;
1951 }
1952 return NULL;
1953}
1954
1955void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample,
1956 struct addr_location *al,
1957 unsigned int print_opts, unsigned int stack_depth)
1958{
1959 struct callchain_cursor_node *node;
1960 int print_ip = print_opts & PRINT_IP_OPT_IP;
1961 int print_sym = print_opts & PRINT_IP_OPT_SYM;
1962 int print_dso = print_opts & PRINT_IP_OPT_DSO;
1963 int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET;
1964 int print_oneline = print_opts & PRINT_IP_OPT_ONELINE;
1965 int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE;
1966 char s = print_oneline ? ' ' : '\t';
1967
1968 if (symbol_conf.use_callchain && sample->callchain) {
1969 struct addr_location node_al;
1970
1971 if (thread__resolve_callchain(al->thread, evsel,
1972 sample, NULL, NULL,
1973 stack_depth) != 0) {
1974 if (verbose)
1975 error("Failed to resolve callchain. Skipping\n");
1976 return;
1977 }
1978 callchain_cursor_commit(&callchain_cursor);
1979
1980 if (print_symoffset)
1981 node_al = *al;
1982
1983 while (stack_depth) {
1984 u64 addr = 0;
1985
1986 node = callchain_cursor_current(&callchain_cursor);
1987 if (!node)
1988 break;
1989
1990 if (node->sym && node->sym->ignore)
1991 goto next;
1992
1993 if (print_ip)
1994 printf("%c%16" PRIx64, s, node->ip);
1995
1996 if (node->map)
1997 addr = node->map->map_ip(node->map, node->ip);
1998
1999 if (print_sym) {
2000 printf(" ");
2001 if (print_symoffset) {
2002 node_al.addr = addr;
2003 node_al.map = node->map;
2004 symbol__fprintf_symname_offs(node->sym, &node_al, stdout);
2005 } else
2006 symbol__fprintf_symname(node->sym, stdout);
2007 }
2008
2009 if (print_dso) {
2010 printf(" (");
2011 map__fprintf_dsoname(node->map, stdout);
2012 printf(")");
2013 }
2014
2015 if (print_srcline)
2016 map__fprintf_srcline(node->map, addr, "\n ",
2017 stdout);
2018
2019 if (!print_oneline)
2020 printf("\n");
2021
2022 stack_depth--;
2023next:
2024 callchain_cursor_advance(&callchain_cursor);
2025 }
2026
2027 } else {
2028 if (al->sym && al->sym->ignore)
2029 return;
2030
2031 if (print_ip)
2032 printf("%16" PRIx64, sample->ip);
2033
2034 if (print_sym) {
2035 printf(" ");
2036 if (print_symoffset)
2037 symbol__fprintf_symname_offs(al->sym, al,
2038 stdout);
2039 else
2040 symbol__fprintf_symname(al->sym, stdout);
2041 }
2042
2043 if (print_dso) {
2044 printf(" (");
2045 map__fprintf_dsoname(al->map, stdout);
2046 printf(")");
2047 }
2048
2049 if (print_srcline)
2050 map__fprintf_srcline(al->map, al->addr, "\n ", stdout);
2051 }
2052}
2053
2054int perf_session__cpu_bitmap(struct perf_session *session,
2055 const char *cpu_list, unsigned long *cpu_bitmap)
2056{
2057 int i, err = -1;
2058 struct cpu_map *map;
2059
2060 for (i = 0; i < PERF_TYPE_MAX; ++i) {
2061 struct perf_evsel *evsel;
2062
2063 evsel = perf_session__find_first_evtype(session, i);
2064 if (!evsel)
2065 continue;
2066
2067 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
2068 pr_err("File does not contain CPU events. "
2069 "Remove -c option to proceed.\n");
2070 return -1;
2071 }
2072 }
2073
2074 map = cpu_map__new(cpu_list);
2075 if (map == NULL) {
2076 pr_err("Invalid cpu_list\n");
2077 return -1;
2078 }
2079
2080 for (i = 0; i < map->nr; i++) {
2081 int cpu = map->map[i];
2082
2083 if (cpu >= MAX_NR_CPUS) {
2084 pr_err("Requested CPU %d too large. "
2085 "Consider raising MAX_NR_CPUS\n", cpu);
2086 goto out_delete_map;
2087 }
2088
2089 set_bit(cpu, cpu_bitmap);
2090 }
2091
2092 err = 0;
2093
2094out_delete_map:
2095 cpu_map__put(map);
2096 return err;
2097}
2098
2099void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
2100 bool full)
2101{
2102 struct stat st;
2103 int fd, ret;
2104
2105 if (session == NULL || fp == NULL)
2106 return;
2107
2108 fd = perf_data_file__fd(session->file);
2109
2110 ret = fstat(fd, &st);
2111 if (ret == -1)
2112 return;
2113
2114 fprintf(fp, "# ========\n");
2115 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
2116 perf_header__fprintf_info(session, fp, full);
2117 fprintf(fp, "# ========\n#\n");
2118}
2119
2120
2121int __perf_session__set_tracepoints_handlers(struct perf_session *session,
2122 const struct perf_evsel_str_handler *assocs,
2123 size_t nr_assocs)
2124{
2125 struct perf_evsel *evsel;
2126 size_t i;
2127 int err;
2128
2129 for (i = 0; i < nr_assocs; i++) {
2130 /*
2131 * Adding a handler for an event not in the session,
2132 * just ignore it.
2133 */
2134 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
2135 if (evsel == NULL)
2136 continue;
2137
2138 err = -EEXIST;
2139 if (evsel->handler != NULL)
2140 goto out;
2141 evsel->handler = assocs[i].handler;
2142 }
2143
2144 err = 0;
2145out:
2146 return err;
2147}
2148
2149int perf_event__process_id_index(struct perf_tool *tool __maybe_unused,
2150 union perf_event *event,
2151 struct perf_session *session)
2152{
2153 struct perf_evlist *evlist = session->evlist;
2154 struct id_index_event *ie = &event->id_index;
2155 size_t i, nr, max_nr;
2156
2157 max_nr = (ie->header.size - sizeof(struct id_index_event)) /
2158 sizeof(struct id_index_entry);
2159 nr = ie->nr;
2160 if (nr > max_nr)
2161 return -EINVAL;
2162
2163 if (dump_trace)
2164 fprintf(stdout, " nr: %zu\n", nr);
2165
2166 for (i = 0; i < nr; i++) {
2167 struct id_index_entry *e = &ie->entries[i];
2168 struct perf_sample_id *sid;
2169
2170 if (dump_trace) {
2171 fprintf(stdout, " ... id: %"PRIu64, e->id);
2172 fprintf(stdout, " idx: %"PRIu64, e->idx);
2173 fprintf(stdout, " cpu: %"PRId64, e->cpu);
2174 fprintf(stdout, " tid: %"PRId64"\n", e->tid);
2175 }
2176
2177 sid = perf_evlist__id2sid(evlist, e->id);
2178 if (!sid)
2179 return -ENOENT;
2180 sid->idx = e->idx;
2181 sid->cpu = e->cpu;
2182 sid->tid = e->tid;
2183 }
2184 return 0;
2185}
2186
2187int perf_event__synthesize_id_index(struct perf_tool *tool,
2188 perf_event__handler_t process,
2189 struct perf_evlist *evlist,
2190 struct machine *machine)
2191{
2192 union perf_event *ev;
2193 struct perf_evsel *evsel;
2194 size_t nr = 0, i = 0, sz, max_nr, n;
2195 int err;
2196
2197 pr_debug2("Synthesizing id index\n");
2198
2199 max_nr = (UINT16_MAX - sizeof(struct id_index_event)) /
2200 sizeof(struct id_index_entry);
2201
2202 evlist__for_each(evlist, evsel)
2203 nr += evsel->ids;
2204
2205 n = nr > max_nr ? max_nr : nr;
2206 sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry);
2207 ev = zalloc(sz);
2208 if (!ev)
2209 return -ENOMEM;
2210
2211 ev->id_index.header.type = PERF_RECORD_ID_INDEX;
2212 ev->id_index.header.size = sz;
2213 ev->id_index.nr = n;
2214
2215 evlist__for_each(evlist, evsel) {
2216 u32 j;
2217
2218 for (j = 0; j < evsel->ids; j++) {
2219 struct id_index_entry *e;
2220 struct perf_sample_id *sid;
2221
2222 if (i >= n) {
2223 err = process(tool, ev, NULL, machine);
2224 if (err)
2225 goto out_err;
2226 nr -= n;
2227 i = 0;
2228 }
2229
2230 e = &ev->id_index.entries[i++];
2231
2232 e->id = evsel->id[j];
2233
2234 sid = perf_evlist__id2sid(evlist, e->id);
2235 if (!sid) {
2236 free(ev);
2237 return -ENOENT;
2238 }
2239
2240 e->idx = sid->idx;
2241 e->cpu = sid->cpu;
2242 e->tid = sid->tid;
2243 }
2244 }
2245
2246 sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry);
2247 ev->id_index.header.size = sz;
2248 ev->id_index.nr = nr;
2249
2250 err = process(tool, ev, NULL, machine);
2251out_err:
2252 free(ev);
2253
2254 return err;
2255}
Linux kernel - Deliverables
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