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Merge tag 'block-5.9-2020-08-14' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / tools / perf / util / session.c
blobffbc9d35a383f717d254c680aabe26ea4e7dc0fd
1 // SPDX-License-Identifier: GPL-2.0
2 #include <errno.h>
3 #include <inttypes.h>
4 #include <linux/err.h>
5 #include <linux/kernel.h>
6 #include <linux/zalloc.h>
7 #include <api/fs/fs.h>
8
9 #include <byteswap.h>
10 #include <unistd.h>
11 #include <sys/types.h>
12 #include <sys/mman.h>
13 #include <perf/cpumap.h>
14
15 #include "map_symbol.h"
16 #include "branch.h"
17 #include "debug.h"
18 #include "evlist.h"
19 #include "evsel.h"
20 #include "memswap.h"
21 #include "map.h"
22 #include "symbol.h"
23 #include "session.h"
24 #include "tool.h"
25 #include "perf_regs.h"
26 #include "asm/bug.h"
27 #include "auxtrace.h"
28 #include "thread.h"
29 #include "thread-stack.h"
30 #include "sample-raw.h"
31 #include "stat.h"
32 #include "ui/progress.h"
33 #include "../perf.h"
34 #include "arch/common.h"
35 #include <internal/lib.h>
36
37 #ifdef HAVE_ZSTD_SUPPORT
38 static int perf_session__process_compressed_event(struct perf_session *session,
39 union perf_event *event, u64 file_offset)
40 {
41 void *src;
42 size_t decomp_size, src_size;
43 u64 decomp_last_rem = 0;
44 size_t mmap_len, decomp_len = session->header.env.comp_mmap_len;
45 struct decomp *decomp, *decomp_last = session->decomp_last;
46
47 if (decomp_last) {
48 decomp_last_rem = decomp_last->size - decomp_last->head;
49 decomp_len += decomp_last_rem;
50 }
51
52 mmap_len = sizeof(struct decomp) + decomp_len;
53 decomp = mmap(NULL, mmap_len, PROT_READ|PROT_WRITE,
54 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
55 if (decomp == MAP_FAILED) {
56 pr_err("Couldn't allocate memory for decompression\n");
57 return -1;
58 }
59
60 decomp->file_pos = file_offset;
61 decomp->mmap_len = mmap_len;
62 decomp->head = 0;
63
64 if (decomp_last_rem) {
65 memcpy(decomp->data, &(decomp_last->data[decomp_last->head]), decomp_last_rem);
66 decomp->size = decomp_last_rem;
67 }
68
69 src = (void *)event + sizeof(struct perf_record_compressed);
70 src_size = event->pack.header.size - sizeof(struct perf_record_compressed);
71
72 decomp_size = zstd_decompress_stream(&(session->zstd_data), src, src_size,
73 &(decomp->data[decomp_last_rem]), decomp_len - decomp_last_rem);
74 if (!decomp_size) {
75 munmap(decomp, mmap_len);
76 pr_err("Couldn't decompress data\n");
77 return -1;
78 }
79
80 decomp->size += decomp_size;
81
82 if (session->decomp == NULL) {
83 session->decomp = decomp;
84 session->decomp_last = decomp;
85 } else {
86 session->decomp_last->next = decomp;
87 session->decomp_last = decomp;
88 }
89
90 pr_debug("decomp (B): %ld to %ld\n", src_size, decomp_size);
91
92 return 0;
93 }
94 #else /* !HAVE_ZSTD_SUPPORT */
95 #define perf_session__process_compressed_event perf_session__process_compressed_event_stub
96 #endif
97
98 static int perf_session__deliver_event(struct perf_session *session,
99 union perf_event *event,
100 struct perf_tool *tool,
101 u64 file_offset);
102
103 static int perf_session__open(struct perf_session *session)
104 {
105 struct perf_data *data = session->data;
106
107 if (perf_session__read_header(session) < 0) {
108 pr_err("incompatible file format (rerun with -v to learn more)\n");
109 return -1;
110 }
111
112 if (perf_data__is_pipe(data))
113 return 0;
114
115 if (perf_header__has_feat(&session->header, HEADER_STAT))
116 return 0;
117
118 if (!evlist__valid_sample_type(session->evlist)) {
119 pr_err("non matching sample_type\n");
120 return -1;
121 }
122
123 if (!evlist__valid_sample_id_all(session->evlist)) {
124 pr_err("non matching sample_id_all\n");
125 return -1;
126 }
127
128 if (!perf_evlist__valid_read_format(session->evlist)) {
129 pr_err("non matching read_format\n");
130 return -1;
131 }
132
133 return 0;
134 }
135
136 void perf_session__set_id_hdr_size(struct perf_session *session)
137 {
138 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
139
140 machines__set_id_hdr_size(&session->machines, id_hdr_size);
141 }
142
143 int perf_session__create_kernel_maps(struct perf_session *session)
144 {
145 int ret = machine__create_kernel_maps(&session->machines.host);
146
147 if (ret >= 0)
148 ret = machines__create_guest_kernel_maps(&session->machines);
149 return ret;
150 }
151
152 static void perf_session__destroy_kernel_maps(struct perf_session *session)
153 {
154 machines__destroy_kernel_maps(&session->machines);
155 }
156
157 static bool perf_session__has_comm_exec(struct perf_session *session)
158 {
159 struct evsel *evsel;
160
161 evlist__for_each_entry(session->evlist, evsel) {
162 if (evsel->core.attr.comm_exec)
163 return true;
164 }
165
166 return false;
167 }
168
169 static void perf_session__set_comm_exec(struct perf_session *session)
170 {
171 bool comm_exec = perf_session__has_comm_exec(session);
172
173 machines__set_comm_exec(&session->machines, comm_exec);
174 }
175
176 static int ordered_events__deliver_event(struct ordered_events *oe,
177 struct ordered_event *event)
178 {
179 struct perf_session *session = container_of(oe, struct perf_session,
180 ordered_events);
181
182 return perf_session__deliver_event(session, event->event,
183 session->tool, event->file_offset);
184 }
185
186 struct perf_session *perf_session__new(struct perf_data *data,
187 bool repipe, struct perf_tool *tool)
188 {
189 int ret = -ENOMEM;
190 struct perf_session *session = zalloc(sizeof(*session));
191
192 if (!session)
193 goto out;
194
195 session->repipe = repipe;
196 session->tool = tool;
197 INIT_LIST_HEAD(&session->auxtrace_index);
198 machines__init(&session->machines);
199 ordered_events__init(&session->ordered_events,
200 ordered_events__deliver_event, NULL);
201
202 perf_env__init(&session->header.env);
203 if (data) {
204 ret = perf_data__open(data);
205 if (ret < 0)
206 goto out_delete;
207
208 session->data = data;
209
210 if (perf_data__is_read(data)) {
211 ret = perf_session__open(session);
212 if (ret < 0)
213 goto out_delete;
214
215 /*
216 * set session attributes that are present in perf.data
217 * but not in pipe-mode.
218 */
219 if (!data->is_pipe) {
220 perf_session__set_id_hdr_size(session);
221 perf_session__set_comm_exec(session);
222 }
223
224 perf_evlist__init_trace_event_sample_raw(session->evlist);
225
226 /* Open the directory data. */
227 if (data->is_dir) {
228 ret = perf_data__open_dir(data);
229 if (ret)
230 goto out_delete;
231 }
232
233 if (!symbol_conf.kallsyms_name &&
234 !symbol_conf.vmlinux_name)
235 symbol_conf.kallsyms_name = perf_data__kallsyms_name(data);
236 }
237 } else {
238 session->machines.host.env = &perf_env;
239 }
240
241 session->machines.host.single_address_space =
242 perf_env__single_address_space(session->machines.host.env);
243
244 if (!data || perf_data__is_write(data)) {
245 /*
246 * In O_RDONLY mode this will be performed when reading the
247 * kernel MMAP event, in perf_event__process_mmap().
248 */
249 if (perf_session__create_kernel_maps(session) < 0)
250 pr_warning("Cannot read kernel map\n");
251 }
252
253 /*
254 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is
255 * processed, so evlist__sample_id_all is not meaningful here.
256 */
257 if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps &&
258 tool->ordered_events && !evlist__sample_id_all(session->evlist)) {
259 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
260 tool->ordered_events = false;
261 }
262
263 return session;
264
265 out_delete:
266 perf_session__delete(session);
267 out:
268 return ERR_PTR(ret);
269 }
270
271 static void perf_session__delete_threads(struct perf_session *session)
272 {
273 machine__delete_threads(&session->machines.host);
274 }
275
276 static void perf_session__release_decomp_events(struct perf_session *session)
277 {
278 struct decomp *next, *decomp;
279 size_t mmap_len;
280 next = session->decomp;
281 do {
282 decomp = next;
283 if (decomp == NULL)
284 break;
285 next = decomp->next;
286 mmap_len = decomp->mmap_len;
287 munmap(decomp, mmap_len);
288 } while (1);
289 }
290
291 void perf_session__delete(struct perf_session *session)
292 {
293 if (session == NULL)
294 return;
295 auxtrace__free(session);
296 auxtrace_index__free(&session->auxtrace_index);
297 perf_session__destroy_kernel_maps(session);
298 perf_session__delete_threads(session);
299 perf_session__release_decomp_events(session);
300 perf_env__exit(&session->header.env);
301 machines__exit(&session->machines);
302 if (session->data)
303 perf_data__close(session->data);
304 free(session);
305 }
306
307 static int process_event_synth_tracing_data_stub(struct perf_session *session
308 __maybe_unused,
309 union perf_event *event
310 __maybe_unused)
311 {
312 dump_printf(": unhandled!\n");
313 return 0;
314 }
315
316 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
317 union perf_event *event __maybe_unused,
318 struct evlist **pevlist
319 __maybe_unused)
320 {
321 dump_printf(": unhandled!\n");
322 return 0;
323 }
324
325 static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused,
326 union perf_event *event __maybe_unused,
327 struct evlist **pevlist
328 __maybe_unused)
329 {
330 if (dump_trace)
331 perf_event__fprintf_event_update(event, stdout);
332
333 dump_printf(": unhandled!\n");
334 return 0;
335 }
336
337 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
338 union perf_event *event __maybe_unused,
339 struct perf_sample *sample __maybe_unused,
340 struct evsel *evsel __maybe_unused,
341 struct machine *machine __maybe_unused)
342 {
343 dump_printf(": unhandled!\n");
344 return 0;
345 }
346
347 static int process_event_stub(struct perf_tool *tool __maybe_unused,
348 union perf_event *event __maybe_unused,
349 struct perf_sample *sample __maybe_unused,
350 struct machine *machine __maybe_unused)
351 {
352 dump_printf(": unhandled!\n");
353 return 0;
354 }
355
356 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
357 union perf_event *event __maybe_unused,
358 struct ordered_events *oe __maybe_unused)
359 {
360 dump_printf(": unhandled!\n");
361 return 0;
362 }
363
364 static int process_finished_round(struct perf_tool *tool,
365 union perf_event *event,
366 struct ordered_events *oe);
367
368 static int skipn(int fd, off_t n)
369 {
370 char buf[4096];
371 ssize_t ret;
372
373 while (n > 0) {
374 ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
375 if (ret <= 0)
376 return ret;
377 n -= ret;
378 }
379
380 return 0;
381 }
382
383 static s64 process_event_auxtrace_stub(struct perf_session *session __maybe_unused,
384 union perf_event *event)
385 {
386 dump_printf(": unhandled!\n");
387 if (perf_data__is_pipe(session->data))
388 skipn(perf_data__fd(session->data), event->auxtrace.size);
389 return event->auxtrace.size;
390 }
391
392 static int process_event_op2_stub(struct perf_session *session __maybe_unused,
393 union perf_event *event __maybe_unused)
394 {
395 dump_printf(": unhandled!\n");
396 return 0;
397 }
398
399
400 static
401 int process_event_thread_map_stub(struct perf_session *session __maybe_unused,
402 union perf_event *event __maybe_unused)
403 {
404 if (dump_trace)
405 perf_event__fprintf_thread_map(event, stdout);
406
407 dump_printf(": unhandled!\n");
408 return 0;
409 }
410
411 static
412 int process_event_cpu_map_stub(struct perf_session *session __maybe_unused,
413 union perf_event *event __maybe_unused)
414 {
415 if (dump_trace)
416 perf_event__fprintf_cpu_map(event, stdout);
417
418 dump_printf(": unhandled!\n");
419 return 0;
420 }
421
422 static
423 int process_event_stat_config_stub(struct perf_session *session __maybe_unused,
424 union perf_event *event __maybe_unused)
425 {
426 if (dump_trace)
427 perf_event__fprintf_stat_config(event, stdout);
428
429 dump_printf(": unhandled!\n");
430 return 0;
431 }
432
433 static int process_stat_stub(struct perf_session *perf_session __maybe_unused,
434 union perf_event *event)
435 {
436 if (dump_trace)
437 perf_event__fprintf_stat(event, stdout);
438
439 dump_printf(": unhandled!\n");
440 return 0;
441 }
442
443 static int process_stat_round_stub(struct perf_session *perf_session __maybe_unused,
444 union perf_event *event)
445 {
446 if (dump_trace)
447 perf_event__fprintf_stat_round(event, stdout);
448
449 dump_printf(": unhandled!\n");
450 return 0;
451 }
452
453 static int perf_session__process_compressed_event_stub(struct perf_session *session __maybe_unused,
454 union perf_event *event __maybe_unused,
455 u64 file_offset __maybe_unused)
456 {
457 dump_printf(": unhandled!\n");
458 return 0;
459 }
460
461 void perf_tool__fill_defaults(struct perf_tool *tool)
462 {
463 if (tool->sample == NULL)
464 tool->sample = process_event_sample_stub;
465 if (tool->mmap == NULL)
466 tool->mmap = process_event_stub;
467 if (tool->mmap2 == NULL)
468 tool->mmap2 = process_event_stub;
469 if (tool->comm == NULL)
470 tool->comm = process_event_stub;
471 if (tool->namespaces == NULL)
472 tool->namespaces = process_event_stub;
473 if (tool->cgroup == NULL)
474 tool->cgroup = process_event_stub;
475 if (tool->fork == NULL)
476 tool->fork = process_event_stub;
477 if (tool->exit == NULL)
478 tool->exit = process_event_stub;
479 if (tool->lost == NULL)
480 tool->lost = perf_event__process_lost;
481 if (tool->lost_samples == NULL)
482 tool->lost_samples = perf_event__process_lost_samples;
483 if (tool->aux == NULL)
484 tool->aux = perf_event__process_aux;
485 if (tool->itrace_start == NULL)
486 tool->itrace_start = perf_event__process_itrace_start;
487 if (tool->context_switch == NULL)
488 tool->context_switch = perf_event__process_switch;
489 if (tool->ksymbol == NULL)
490 tool->ksymbol = perf_event__process_ksymbol;
491 if (tool->bpf == NULL)
492 tool->bpf = perf_event__process_bpf;
493 if (tool->text_poke == NULL)
494 tool->text_poke = perf_event__process_text_poke;
495 if (tool->read == NULL)
496 tool->read = process_event_sample_stub;
497 if (tool->throttle == NULL)
498 tool->throttle = process_event_stub;
499 if (tool->unthrottle == NULL)
500 tool->unthrottle = process_event_stub;
501 if (tool->attr == NULL)
502 tool->attr = process_event_synth_attr_stub;
503 if (tool->event_update == NULL)
504 tool->event_update = process_event_synth_event_update_stub;
505 if (tool->tracing_data == NULL)
506 tool->tracing_data = process_event_synth_tracing_data_stub;
507 if (tool->build_id == NULL)
508 tool->build_id = process_event_op2_stub;
509 if (tool->finished_round == NULL) {
510 if (tool->ordered_events)
511 tool->finished_round = process_finished_round;
512 else
513 tool->finished_round = process_finished_round_stub;
514 }
515 if (tool->id_index == NULL)
516 tool->id_index = process_event_op2_stub;
517 if (tool->auxtrace_info == NULL)
518 tool->auxtrace_info = process_event_op2_stub;
519 if (tool->auxtrace == NULL)
520 tool->auxtrace = process_event_auxtrace_stub;
521 if (tool->auxtrace_error == NULL)
522 tool->auxtrace_error = process_event_op2_stub;
523 if (tool->thread_map == NULL)
524 tool->thread_map = process_event_thread_map_stub;
525 if (tool->cpu_map == NULL)
526 tool->cpu_map = process_event_cpu_map_stub;
527 if (tool->stat_config == NULL)
528 tool->stat_config = process_event_stat_config_stub;
529 if (tool->stat == NULL)
530 tool->stat = process_stat_stub;
531 if (tool->stat_round == NULL)
532 tool->stat_round = process_stat_round_stub;
533 if (tool->time_conv == NULL)
534 tool->time_conv = process_event_op2_stub;
535 if (tool->feature == NULL)
536 tool->feature = process_event_op2_stub;
537 if (tool->compressed == NULL)
538 tool->compressed = perf_session__process_compressed_event;
539 }
540
541 static void swap_sample_id_all(union perf_event *event, void *data)
542 {
543 void *end = (void *) event + event->header.size;
544 int size = end - data;
545
546 BUG_ON(size % sizeof(u64));
547 mem_bswap_64(data, size);
548 }
549
550 static void perf_event__all64_swap(union perf_event *event,
551 bool sample_id_all __maybe_unused)
552 {
553 struct perf_event_header *hdr = &event->header;
554 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
555 }
556
557 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
558 {
559 event->comm.pid = bswap_32(event->comm.pid);
560 event->comm.tid = bswap_32(event->comm.tid);
561
562 if (sample_id_all) {
563 void *data = &event->comm.comm;
564
565 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
566 swap_sample_id_all(event, data);
567 }
568 }
569
570 static void perf_event__mmap_swap(union perf_event *event,
571 bool sample_id_all)
572 {
573 event->mmap.pid = bswap_32(event->mmap.pid);
574 event->mmap.tid = bswap_32(event->mmap.tid);
575 event->mmap.start = bswap_64(event->mmap.start);
576 event->mmap.len = bswap_64(event->mmap.len);
577 event->mmap.pgoff = bswap_64(event->mmap.pgoff);
578
579 if (sample_id_all) {
580 void *data = &event->mmap.filename;
581
582 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
583 swap_sample_id_all(event, data);
584 }
585 }
586
587 static void perf_event__mmap2_swap(union perf_event *event,
588 bool sample_id_all)
589 {
590 event->mmap2.pid = bswap_32(event->mmap2.pid);
591 event->mmap2.tid = bswap_32(event->mmap2.tid);
592 event->mmap2.start = bswap_64(event->mmap2.start);
593 event->mmap2.len = bswap_64(event->mmap2.len);
594 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
595 event->mmap2.maj = bswap_32(event->mmap2.maj);
596 event->mmap2.min = bswap_32(event->mmap2.min);
597 event->mmap2.ino = bswap_64(event->mmap2.ino);
598
599 if (sample_id_all) {
600 void *data = &event->mmap2.filename;
601
602 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
603 swap_sample_id_all(event, data);
604 }
605 }
606 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
607 {
608 event->fork.pid = bswap_32(event->fork.pid);
609 event->fork.tid = bswap_32(event->fork.tid);
610 event->fork.ppid = bswap_32(event->fork.ppid);
611 event->fork.ptid = bswap_32(event->fork.ptid);
612 event->fork.time = bswap_64(event->fork.time);
613
614 if (sample_id_all)
615 swap_sample_id_all(event, &event->fork + 1);
616 }
617
618 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
619 {
620 event->read.pid = bswap_32(event->read.pid);
621 event->read.tid = bswap_32(event->read.tid);
622 event->read.value = bswap_64(event->read.value);
623 event->read.time_enabled = bswap_64(event->read.time_enabled);
624 event->read.time_running = bswap_64(event->read.time_running);
625 event->read.id = bswap_64(event->read.id);
626
627 if (sample_id_all)
628 swap_sample_id_all(event, &event->read + 1);
629 }
630
631 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
632 {
633 event->aux.aux_offset = bswap_64(event->aux.aux_offset);
634 event->aux.aux_size = bswap_64(event->aux.aux_size);
635 event->aux.flags = bswap_64(event->aux.flags);
636
637 if (sample_id_all)
638 swap_sample_id_all(event, &event->aux + 1);
639 }
640
641 static void perf_event__itrace_start_swap(union perf_event *event,
642 bool sample_id_all)
643 {
644 event->itrace_start.pid = bswap_32(event->itrace_start.pid);
645 event->itrace_start.tid = bswap_32(event->itrace_start.tid);
646
647 if (sample_id_all)
648 swap_sample_id_all(event, &event->itrace_start + 1);
649 }
650
651 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
652 {
653 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
654 event->context_switch.next_prev_pid =
655 bswap_32(event->context_switch.next_prev_pid);
656 event->context_switch.next_prev_tid =
657 bswap_32(event->context_switch.next_prev_tid);
658 }
659
660 if (sample_id_all)
661 swap_sample_id_all(event, &event->context_switch + 1);
662 }
663
664 static void perf_event__text_poke_swap(union perf_event *event, bool sample_id_all)
665 {
666 event->text_poke.addr = bswap_64(event->text_poke.addr);
667 event->text_poke.old_len = bswap_16(event->text_poke.old_len);
668 event->text_poke.new_len = bswap_16(event->text_poke.new_len);
669
670 if (sample_id_all) {
671 size_t len = sizeof(event->text_poke.old_len) +
672 sizeof(event->text_poke.new_len) +
673 event->text_poke.old_len +
674 event->text_poke.new_len;
675 void *data = &event->text_poke.old_len;
676
677 data += PERF_ALIGN(len, sizeof(u64));
678 swap_sample_id_all(event, data);
679 }
680 }
681
682 static void perf_event__throttle_swap(union perf_event *event,
683 bool sample_id_all)
684 {
685 event->throttle.time = bswap_64(event->throttle.time);
686 event->throttle.id = bswap_64(event->throttle.id);
687 event->throttle.stream_id = bswap_64(event->throttle.stream_id);
688
689 if (sample_id_all)
690 swap_sample_id_all(event, &event->throttle + 1);
691 }
692
693 static void perf_event__namespaces_swap(union perf_event *event,
694 bool sample_id_all)
695 {
696 u64 i;
697
698 event->namespaces.pid = bswap_32(event->namespaces.pid);
699 event->namespaces.tid = bswap_32(event->namespaces.tid);
700 event->namespaces.nr_namespaces = bswap_64(event->namespaces.nr_namespaces);
701
702 for (i = 0; i < event->namespaces.nr_namespaces; i++) {
703 struct perf_ns_link_info *ns = &event->namespaces.link_info[i];
704
705 ns->dev = bswap_64(ns->dev);
706 ns->ino = bswap_64(ns->ino);
707 }
708
709 if (sample_id_all)
710 swap_sample_id_all(event, &event->namespaces.link_info[i]);
711 }
712
713 static u8 revbyte(u8 b)
714 {
715 int rev = (b >> 4) | ((b & 0xf) << 4);
716 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
717 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
718 return (u8) rev;
719 }
720
721 /*
722 * XXX this is hack in attempt to carry flags bitfield
723 * through endian village. ABI says:
724 *
725 * Bit-fields are allocated from right to left (least to most significant)
726 * on little-endian implementations and from left to right (most to least
727 * significant) on big-endian implementations.
728 *
729 * The above seems to be byte specific, so we need to reverse each
730 * byte of the bitfield. 'Internet' also says this might be implementation
731 * specific and we probably need proper fix and carry perf_event_attr
732 * bitfield flags in separate data file FEAT_ section. Thought this seems
733 * to work for now.
734 */
735 static void swap_bitfield(u8 *p, unsigned len)
736 {
737 unsigned i;
738
739 for (i = 0; i < len; i++) {
740 *p = revbyte(*p);
741 p++;
742 }
743 }
744
745 /* exported for swapping attributes in file header */
746 void perf_event__attr_swap(struct perf_event_attr *attr)
747 {
748 attr->type = bswap_32(attr->type);
749 attr->size = bswap_32(attr->size);
750
751 #define bswap_safe(f, n) \
752 (attr->size > (offsetof(struct perf_event_attr, f) + \
753 sizeof(attr->f) * (n)))
754 #define bswap_field(f, sz) \
755 do { \
756 if (bswap_safe(f, 0)) \
757 attr->f = bswap_##sz(attr->f); \
758 } while(0)
759 #define bswap_field_16(f) bswap_field(f, 16)
760 #define bswap_field_32(f) bswap_field(f, 32)
761 #define bswap_field_64(f) bswap_field(f, 64)
762
763 bswap_field_64(config);
764 bswap_field_64(sample_period);
765 bswap_field_64(sample_type);
766 bswap_field_64(read_format);
767 bswap_field_32(wakeup_events);
768 bswap_field_32(bp_type);
769 bswap_field_64(bp_addr);
770 bswap_field_64(bp_len);
771 bswap_field_64(branch_sample_type);
772 bswap_field_64(sample_regs_user);
773 bswap_field_32(sample_stack_user);
774 bswap_field_32(aux_watermark);
775 bswap_field_16(sample_max_stack);
776 bswap_field_32(aux_sample_size);
777
778 /*
779 * After read_format are bitfields. Check read_format because
780 * we are unable to use offsetof on bitfield.
781 */
782 if (bswap_safe(read_format, 1))
783 swap_bitfield((u8 *) (&attr->read_format + 1),
784 sizeof(u64));
785 #undef bswap_field_64
786 #undef bswap_field_32
787 #undef bswap_field
788 #undef bswap_safe
789 }
790
791 static void perf_event__hdr_attr_swap(union perf_event *event,
792 bool sample_id_all __maybe_unused)
793 {
794 size_t size;
795
796 perf_event__attr_swap(&event->attr.attr);
797
798 size = event->header.size;
799 size -= (void *)&event->attr.id - (void *)event;
800 mem_bswap_64(event->attr.id, size);
801 }
802
803 static void perf_event__event_update_swap(union perf_event *event,
804 bool sample_id_all __maybe_unused)
805 {
806 event->event_update.type = bswap_64(event->event_update.type);
807 event->event_update.id = bswap_64(event->event_update.id);
808 }
809
810 static void perf_event__event_type_swap(union perf_event *event,
811 bool sample_id_all __maybe_unused)
812 {
813 event->event_type.event_type.event_id =
814 bswap_64(event->event_type.event_type.event_id);
815 }
816
817 static void perf_event__tracing_data_swap(union perf_event *event,
818 bool sample_id_all __maybe_unused)
819 {
820 event->tracing_data.size = bswap_32(event->tracing_data.size);
821 }
822
823 static void perf_event__auxtrace_info_swap(union perf_event *event,
824 bool sample_id_all __maybe_unused)
825 {
826 size_t size;
827
828 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
829
830 size = event->header.size;
831 size -= (void *)&event->auxtrace_info.priv - (void *)event;
832 mem_bswap_64(event->auxtrace_info.priv, size);
833 }
834
835 static void perf_event__auxtrace_swap(union perf_event *event,
836 bool sample_id_all __maybe_unused)
837 {
838 event->auxtrace.size = bswap_64(event->auxtrace.size);
839 event->auxtrace.offset = bswap_64(event->auxtrace.offset);
840 event->auxtrace.reference = bswap_64(event->auxtrace.reference);
841 event->auxtrace.idx = bswap_32(event->auxtrace.idx);
842 event->auxtrace.tid = bswap_32(event->auxtrace.tid);
843 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu);
844 }
845
846 static void perf_event__auxtrace_error_swap(union perf_event *event,
847 bool sample_id_all __maybe_unused)
848 {
849 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
850 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
851 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu);
852 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid);
853 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid);
854 event->auxtrace_error.fmt = bswap_32(event->auxtrace_error.fmt);
855 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip);
856 if (event->auxtrace_error.fmt)
857 event->auxtrace_error.time = bswap_64(event->auxtrace_error.time);
858 }
859
860 static void perf_event__thread_map_swap(union perf_event *event,
861 bool sample_id_all __maybe_unused)
862 {
863 unsigned i;
864
865 event->thread_map.nr = bswap_64(event->thread_map.nr);
866
867 for (i = 0; i < event->thread_map.nr; i++)
868 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
869 }
870
871 static void perf_event__cpu_map_swap(union perf_event *event,
872 bool sample_id_all __maybe_unused)
873 {
874 struct perf_record_cpu_map_data *data = &event->cpu_map.data;
875 struct cpu_map_entries *cpus;
876 struct perf_record_record_cpu_map *mask;
877 unsigned i;
878
879 data->type = bswap_64(data->type);
880
881 switch (data->type) {
882 case PERF_CPU_MAP__CPUS:
883 cpus = (struct cpu_map_entries *)data->data;
884
885 cpus->nr = bswap_16(cpus->nr);
886
887 for (i = 0; i < cpus->nr; i++)
888 cpus->cpu[i] = bswap_16(cpus->cpu[i]);
889 break;
890 case PERF_CPU_MAP__MASK:
891 mask = (struct perf_record_record_cpu_map *)data->data;
892
893 mask->nr = bswap_16(mask->nr);
894 mask->long_size = bswap_16(mask->long_size);
895
896 switch (mask->long_size) {
897 case 4: mem_bswap_32(&mask->mask, mask->nr); break;
898 case 8: mem_bswap_64(&mask->mask, mask->nr); break;
899 default:
900 pr_err("cpu_map swap: unsupported long size\n");
901 }
902 default:
903 break;
904 }
905 }
906
907 static void perf_event__stat_config_swap(union perf_event *event,
908 bool sample_id_all __maybe_unused)
909 {
910 u64 size;
911
912 size = event->stat_config.nr * sizeof(event->stat_config.data[0]);
913 size += 1; /* nr item itself */
914 mem_bswap_64(&event->stat_config.nr, size);
915 }
916
917 static void perf_event__stat_swap(union perf_event *event,
918 bool sample_id_all __maybe_unused)
919 {
920 event->stat.id = bswap_64(event->stat.id);
921 event->stat.thread = bswap_32(event->stat.thread);
922 event->stat.cpu = bswap_32(event->stat.cpu);
923 event->stat.val = bswap_64(event->stat.val);
924 event->stat.ena = bswap_64(event->stat.ena);
925 event->stat.run = bswap_64(event->stat.run);
926 }
927
928 static void perf_event__stat_round_swap(union perf_event *event,
929 bool sample_id_all __maybe_unused)
930 {
931 event->stat_round.type = bswap_64(event->stat_round.type);
932 event->stat_round.time = bswap_64(event->stat_round.time);
933 }
934
935 typedef void (*perf_event__swap_op)(union perf_event *event,
936 bool sample_id_all);
937
938 static perf_event__swap_op perf_event__swap_ops[] = {
939 [PERF_RECORD_MMAP] = perf_event__mmap_swap,
940 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap,
941 [PERF_RECORD_COMM] = perf_event__comm_swap,
942 [PERF_RECORD_FORK] = perf_event__task_swap,
943 [PERF_RECORD_EXIT] = perf_event__task_swap,
944 [PERF_RECORD_LOST] = perf_event__all64_swap,
945 [PERF_RECORD_READ] = perf_event__read_swap,
946 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap,
947 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap,
948 [PERF_RECORD_SAMPLE] = perf_event__all64_swap,
949 [PERF_RECORD_AUX] = perf_event__aux_swap,
950 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap,
951 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap,
952 [PERF_RECORD_SWITCH] = perf_event__switch_swap,
953 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap,
954 [PERF_RECORD_NAMESPACES] = perf_event__namespaces_swap,
955 [PERF_RECORD_TEXT_POKE] = perf_event__text_poke_swap,
956 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
957 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
958 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
959 [PERF_RECORD_HEADER_BUILD_ID] = NULL,
960 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap,
961 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap,
962 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap,
963 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap,
964 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap,
965 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap,
966 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap,
967 [PERF_RECORD_STAT] = perf_event__stat_swap,
968 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap,
969 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap,
970 [PERF_RECORD_TIME_CONV] = perf_event__all64_swap,
971 [PERF_RECORD_HEADER_MAX] = NULL,
972 };
973
974 /*
975 * When perf record finishes a pass on every buffers, it records this pseudo
976 * event.
977 * We record the max timestamp t found in the pass n.
978 * Assuming these timestamps are monotonic across cpus, we know that if
979 * a buffer still has events with timestamps below t, they will be all
980 * available and then read in the pass n + 1.
981 * Hence when we start to read the pass n + 2, we can safely flush every
982 * events with timestamps below t.
983 *
984 * ============ PASS n =================
985 * CPU 0 | CPU 1
986 * |
987 * cnt1 timestamps | cnt2 timestamps
988 * 1 | 2
989 * 2 | 3
990 * - | 4 <--- max recorded
991 *
992 * ============ PASS n + 1 ==============
993 * CPU 0 | CPU 1
994 * |
995 * cnt1 timestamps | cnt2 timestamps
996 * 3 | 5
997 * 4 | 6
998 * 5 | 7 <---- max recorded
999 *
1000 * Flush every events below timestamp 4
1001 *
1002 * ============ PASS n + 2 ==============
1003 * CPU 0 | CPU 1
1004 * |
1005 * cnt1 timestamps | cnt2 timestamps
1006 * 6 | 8
1007 * 7 | 9
1008 * - | 10
1009 *
1010 * Flush every events below timestamp 7
1011 * etc...
1012 */
1013 static int process_finished_round(struct perf_tool *tool __maybe_unused,
1014 union perf_event *event __maybe_unused,
1015 struct ordered_events *oe)
1016 {
1017 if (dump_trace)
1018 fprintf(stdout, "\n");
1019 return ordered_events__flush(oe, OE_FLUSH__ROUND);
1020 }
1021
1022 int perf_session__queue_event(struct perf_session *s, union perf_event *event,
1023 u64 timestamp, u64 file_offset)
1024 {
1025 return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset);
1026 }
1027
1028 static void callchain__lbr_callstack_printf(struct perf_sample *sample)
1029 {
1030 struct ip_callchain *callchain = sample->callchain;
1031 struct branch_stack *lbr_stack = sample->branch_stack;
1032 struct branch_entry *entries = perf_sample__branch_entries(sample);
1033 u64 kernel_callchain_nr = callchain->nr;
1034 unsigned int i;
1035
1036 for (i = 0; i < kernel_callchain_nr; i++) {
1037 if (callchain->ips[i] == PERF_CONTEXT_USER)
1038 break;
1039 }
1040
1041 if ((i != kernel_callchain_nr) && lbr_stack->nr) {
1042 u64 total_nr;
1043 /*
1044 * LBR callstack can only get user call chain,
1045 * i is kernel call chain number,
1046 * 1 is PERF_CONTEXT_USER.
1047 *
1048 * The user call chain is stored in LBR registers.
1049 * LBR are pair registers. The caller is stored
1050 * in "from" register, while the callee is stored
1051 * in "to" register.
1052 * For example, there is a call stack
1053 * "A"->"B"->"C"->"D".
1054 * The LBR registers will recorde like
1055 * "C"->"D", "B"->"C", "A"->"B".
1056 * So only the first "to" register and all "from"
1057 * registers are needed to construct the whole stack.
1058 */
1059 total_nr = i + 1 + lbr_stack->nr + 1;
1060 kernel_callchain_nr = i + 1;
1061
1062 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
1063
1064 for (i = 0; i < kernel_callchain_nr; i++)
1065 printf("..... %2d: %016" PRIx64 "\n",
1066 i, callchain->ips[i]);
1067
1068 printf("..... %2d: %016" PRIx64 "\n",
1069 (int)(kernel_callchain_nr), entries[0].to);
1070 for (i = 0; i < lbr_stack->nr; i++)
1071 printf("..... %2d: %016" PRIx64 "\n",
1072 (int)(i + kernel_callchain_nr + 1), entries[i].from);
1073 }
1074 }
1075
1076 static void callchain__printf(struct evsel *evsel,
1077 struct perf_sample *sample)
1078 {
1079 unsigned int i;
1080 struct ip_callchain *callchain = sample->callchain;
1081
1082 if (evsel__has_branch_callstack(evsel))
1083 callchain__lbr_callstack_printf(sample);
1084
1085 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
1086
1087 for (i = 0; i < callchain->nr; i++)
1088 printf("..... %2d: %016" PRIx64 "\n",
1089 i, callchain->ips[i]);
1090 }
1091
1092 static void branch_stack__printf(struct perf_sample *sample, bool callstack)
1093 {
1094 struct branch_entry *entries = perf_sample__branch_entries(sample);
1095 uint64_t i;
1096
1097 printf("%s: nr:%" PRIu64 "\n",
1098 !callstack ? "... branch stack" : "... branch callstack",
1099 sample->branch_stack->nr);
1100
1101 for (i = 0; i < sample->branch_stack->nr; i++) {
1102 struct branch_entry *e = &entries[i];
1103
1104 if (!callstack) {
1105 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n",
1106 i, e->from, e->to,
1107 (unsigned short)e->flags.cycles,
1108 e->flags.mispred ? "M" : " ",
1109 e->flags.predicted ? "P" : " ",
1110 e->flags.abort ? "A" : " ",
1111 e->flags.in_tx ? "T" : " ",
1112 (unsigned)e->flags.reserved);
1113 } else {
1114 printf("..... %2"PRIu64": %016" PRIx64 "\n",
1115 i, i > 0 ? e->from : e->to);
1116 }
1117 }
1118 }
1119
1120 static void regs_dump__printf(u64 mask, u64 *regs)
1121 {
1122 unsigned rid, i = 0;
1123
1124 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
1125 u64 val = regs[i++];
1126
1127 printf(".... %-5s 0x%016" PRIx64 "\n",
1128 perf_reg_name(rid), val);
1129 }
1130 }
1131
1132 static const char *regs_abi[] = {
1133 [PERF_SAMPLE_REGS_ABI_NONE] = "none",
1134 [PERF_SAMPLE_REGS_ABI_32] = "32-bit",
1135 [PERF_SAMPLE_REGS_ABI_64] = "64-bit",
1136 };
1137
1138 static inline const char *regs_dump_abi(struct regs_dump *d)
1139 {
1140 if (d->abi > PERF_SAMPLE_REGS_ABI_64)
1141 return "unknown";
1142
1143 return regs_abi[d->abi];
1144 }
1145
1146 static void regs__printf(const char *type, struct regs_dump *regs)
1147 {
1148 u64 mask = regs->mask;
1149
1150 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
1151 type,
1152 mask,
1153 regs_dump_abi(regs));
1154
1155 regs_dump__printf(mask, regs->regs);
1156 }
1157
1158 static void regs_user__printf(struct perf_sample *sample)
1159 {
1160 struct regs_dump *user_regs = &sample->user_regs;
1161
1162 if (user_regs->regs)
1163 regs__printf("user", user_regs);
1164 }
1165
1166 static void regs_intr__printf(struct perf_sample *sample)
1167 {
1168 struct regs_dump *intr_regs = &sample->intr_regs;
1169
1170 if (intr_regs->regs)
1171 regs__printf("intr", intr_regs);
1172 }
1173
1174 static void stack_user__printf(struct stack_dump *dump)
1175 {
1176 printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
1177 dump->size, dump->offset);
1178 }
1179
1180 static void perf_evlist__print_tstamp(struct evlist *evlist,
1181 union perf_event *event,
1182 struct perf_sample *sample)
1183 {
1184 u64 sample_type = __evlist__combined_sample_type(evlist);
1185
1186 if (event->header.type != PERF_RECORD_SAMPLE &&
1187 !evlist__sample_id_all(evlist)) {
1188 fputs("-1 -1 ", stdout);
1189 return;
1190 }
1191
1192 if ((sample_type & PERF_SAMPLE_CPU))
1193 printf("%u ", sample->cpu);
1194
1195 if (sample_type & PERF_SAMPLE_TIME)
1196 printf("%" PRIu64 " ", sample->time);
1197 }
1198
1199 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
1200 {
1201 printf("... sample_read:\n");
1202
1203 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1204 printf("...... time enabled %016" PRIx64 "\n",
1205 sample->read.time_enabled);
1206
1207 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1208 printf("...... time running %016" PRIx64 "\n",
1209 sample->read.time_running);
1210
1211 if (read_format & PERF_FORMAT_GROUP) {
1212 u64 i;
1213
1214 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
1215
1216 for (i = 0; i < sample->read.group.nr; i++) {
1217 struct sample_read_value *value;
1218
1219 value = &sample->read.group.values[i];
1220 printf("..... id %016" PRIx64
1221 ", value %016" PRIx64 "\n",
1222 value->id, value->value);
1223 }
1224 } else
1225 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
1226 sample->read.one.id, sample->read.one.value);
1227 }
1228
1229 static void dump_event(struct evlist *evlist, union perf_event *event,
1230 u64 file_offset, struct perf_sample *sample)
1231 {
1232 if (!dump_trace)
1233 return;
1234
1235 printf("\n%#" PRIx64 " [%#x]: event: %d\n",
1236 file_offset, event->header.size, event->header.type);
1237
1238 trace_event(event);
1239 if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw)
1240 evlist->trace_event_sample_raw(evlist, event, sample);
1241
1242 if (sample)
1243 perf_evlist__print_tstamp(evlist, event, sample);
1244
1245 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
1246 event->header.size, perf_event__name(event->header.type));
1247 }
1248
1249 static void dump_sample(struct evsel *evsel, union perf_event *event,
1250 struct perf_sample *sample)
1251 {
1252 u64 sample_type;
1253
1254 if (!dump_trace)
1255 return;
1256
1257 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
1258 event->header.misc, sample->pid, sample->tid, sample->ip,
1259 sample->period, sample->addr);
1260
1261 sample_type = evsel->core.attr.sample_type;
1262
1263 if (evsel__has_callchain(evsel))
1264 callchain__printf(evsel, sample);
1265
1266 if (evsel__has_br_stack(evsel))
1267 branch_stack__printf(sample, evsel__has_branch_callstack(evsel));
1268
1269 if (sample_type & PERF_SAMPLE_REGS_USER)
1270 regs_user__printf(sample);
1271
1272 if (sample_type & PERF_SAMPLE_REGS_INTR)
1273 regs_intr__printf(sample);
1274
1275 if (sample_type & PERF_SAMPLE_STACK_USER)
1276 stack_user__printf(&sample->user_stack);
1277
1278 if (sample_type & PERF_SAMPLE_WEIGHT)
1279 printf("... weight: %" PRIu64 "\n", sample->weight);
1280
1281 if (sample_type & PERF_SAMPLE_DATA_SRC)
1282 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
1283
1284 if (sample_type & PERF_SAMPLE_PHYS_ADDR)
1285 printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr);
1286
1287 if (sample_type & PERF_SAMPLE_TRANSACTION)
1288 printf("... transaction: %" PRIx64 "\n", sample->transaction);
1289
1290 if (sample_type & PERF_SAMPLE_READ)
1291 sample_read__printf(sample, evsel->core.attr.read_format);
1292 }
1293
1294 static void dump_read(struct evsel *evsel, union perf_event *event)
1295 {
1296 struct perf_record_read *read_event = &event->read;
1297 u64 read_format;
1298
1299 if (!dump_trace)
1300 return;
1301
1302 printf(": %d %d %s %" PRI_lu64 "\n", event->read.pid, event->read.tid,
1303 evsel__name(evsel), event->read.value);
1304
1305 if (!evsel)
1306 return;
1307
1308 read_format = evsel->core.attr.read_format;
1309
1310 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1311 printf("... time enabled : %" PRI_lu64 "\n", read_event->time_enabled);
1312
1313 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1314 printf("... time running : %" PRI_lu64 "\n", read_event->time_running);
1315
1316 if (read_format & PERF_FORMAT_ID)
1317 printf("... id : %" PRI_lu64 "\n", read_event->id);
1318 }
1319
1320 static struct machine *machines__find_for_cpumode(struct machines *machines,
1321 union perf_event *event,
1322 struct perf_sample *sample)
1323 {
1324 struct machine *machine;
1325
1326 if (perf_guest &&
1327 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1328 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1329 u32 pid;
1330
1331 if (event->header.type == PERF_RECORD_MMAP
1332 || event->header.type == PERF_RECORD_MMAP2)
1333 pid = event->mmap.pid;
1334 else
1335 pid = sample->pid;
1336
1337 machine = machines__find(machines, pid);
1338 if (!machine)
1339 machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID);
1340 return machine;
1341 }
1342
1343 return &machines->host;
1344 }
1345
1346 static int deliver_sample_value(struct evlist *evlist,
1347 struct perf_tool *tool,
1348 union perf_event *event,
1349 struct perf_sample *sample,
1350 struct sample_read_value *v,
1351 struct machine *machine)
1352 {
1353 struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
1354 struct evsel *evsel;
1355
1356 if (sid) {
1357 sample->id = v->id;
1358 sample->period = v->value - sid->period;
1359 sid->period = v->value;
1360 }
1361
1362 if (!sid || sid->evsel == NULL) {
1363 ++evlist->stats.nr_unknown_id;
1364 return 0;
1365 }
1366
1367 /*
1368 * There's no reason to deliver sample
1369 * for zero period, bail out.
1370 */
1371 if (!sample->period)
1372 return 0;
1373
1374 evsel = container_of(sid->evsel, struct evsel, core);
1375 return tool->sample(tool, event, sample, evsel, machine);
1376 }
1377
1378 static int deliver_sample_group(struct evlist *evlist,
1379 struct perf_tool *tool,
1380 union perf_event *event,
1381 struct perf_sample *sample,
1382 struct machine *machine)
1383 {
1384 int ret = -EINVAL;
1385 u64 i;
1386
1387 for (i = 0; i < sample->read.group.nr; i++) {
1388 ret = deliver_sample_value(evlist, tool, event, sample,
1389 &sample->read.group.values[i],
1390 machine);
1391 if (ret)
1392 break;
1393 }
1394
1395 return ret;
1396 }
1397
1398 static int
1399 perf_evlist__deliver_sample(struct evlist *evlist,
1400 struct perf_tool *tool,
1401 union perf_event *event,
1402 struct perf_sample *sample,
1403 struct evsel *evsel,
1404 struct machine *machine)
1405 {
1406 /* We know evsel != NULL. */
1407 u64 sample_type = evsel->core.attr.sample_type;
1408 u64 read_format = evsel->core.attr.read_format;
1409
1410 /* Standard sample delivery. */
1411 if (!(sample_type & PERF_SAMPLE_READ))
1412 return tool->sample(tool, event, sample, evsel, machine);
1413
1414 /* For PERF_SAMPLE_READ we have either single or group mode. */
1415 if (read_format & PERF_FORMAT_GROUP)
1416 return deliver_sample_group(evlist, tool, event, sample,
1417 machine);
1418 else
1419 return deliver_sample_value(evlist, tool, event, sample,
1420 &sample->read.one, machine);
1421 }
1422
1423 static int machines__deliver_event(struct machines *machines,
1424 struct evlist *evlist,
1425 union perf_event *event,
1426 struct perf_sample *sample,
1427 struct perf_tool *tool, u64 file_offset)
1428 {
1429 struct evsel *evsel;
1430 struct machine *machine;
1431
1432 dump_event(evlist, event, file_offset, sample);
1433
1434 evsel = perf_evlist__id2evsel(evlist, sample->id);
1435
1436 machine = machines__find_for_cpumode(machines, event, sample);
1437
1438 switch (event->header.type) {
1439 case PERF_RECORD_SAMPLE:
1440 if (evsel == NULL) {
1441 ++evlist->stats.nr_unknown_id;
1442 return 0;
1443 }
1444 dump_sample(evsel, event, sample);
1445 if (machine == NULL) {
1446 ++evlist->stats.nr_unprocessable_samples;
1447 return 0;
1448 }
1449 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1450 case PERF_RECORD_MMAP:
1451 return tool->mmap(tool, event, sample, machine);
1452 case PERF_RECORD_MMAP2:
1453 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1454 ++evlist->stats.nr_proc_map_timeout;
1455 return tool->mmap2(tool, event, sample, machine);
1456 case PERF_RECORD_COMM:
1457 return tool->comm(tool, event, sample, machine);
1458 case PERF_RECORD_NAMESPACES:
1459 return tool->namespaces(tool, event, sample, machine);
1460 case PERF_RECORD_CGROUP:
1461 return tool->cgroup(tool, event, sample, machine);
1462 case PERF_RECORD_FORK:
1463 return tool->fork(tool, event, sample, machine);
1464 case PERF_RECORD_EXIT:
1465 return tool->exit(tool, event, sample, machine);
1466 case PERF_RECORD_LOST:
1467 if (tool->lost == perf_event__process_lost)
1468 evlist->stats.total_lost += event->lost.lost;
1469 return tool->lost(tool, event, sample, machine);
1470 case PERF_RECORD_LOST_SAMPLES:
1471 if (tool->lost_samples == perf_event__process_lost_samples)
1472 evlist->stats.total_lost_samples += event->lost_samples.lost;
1473 return tool->lost_samples(tool, event, sample, machine);
1474 case PERF_RECORD_READ:
1475 dump_read(evsel, event);
1476 return tool->read(tool, event, sample, evsel, machine);
1477 case PERF_RECORD_THROTTLE:
1478 return tool->throttle(tool, event, sample, machine);
1479 case PERF_RECORD_UNTHROTTLE:
1480 return tool->unthrottle(tool, event, sample, machine);
1481 case PERF_RECORD_AUX:
1482 if (tool->aux == perf_event__process_aux) {
1483 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED)
1484 evlist->stats.total_aux_lost += 1;
1485 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL)
1486 evlist->stats.total_aux_partial += 1;
1487 }
1488 return tool->aux(tool, event, sample, machine);
1489 case PERF_RECORD_ITRACE_START:
1490 return tool->itrace_start(tool, event, sample, machine);
1491 case PERF_RECORD_SWITCH:
1492 case PERF_RECORD_SWITCH_CPU_WIDE:
1493 return tool->context_switch(tool, event, sample, machine);
1494 case PERF_RECORD_KSYMBOL:
1495 return tool->ksymbol(tool, event, sample, machine);
1496 case PERF_RECORD_BPF_EVENT:
1497 return tool->bpf(tool, event, sample, machine);
1498 case PERF_RECORD_TEXT_POKE:
1499 return tool->text_poke(tool, event, sample, machine);
1500 default:
1501 ++evlist->stats.nr_unknown_events;
1502 return -1;
1503 }
1504 }
1505
1506 static int perf_session__deliver_event(struct perf_session *session,
1507 union perf_event *event,
1508 struct perf_tool *tool,
1509 u64 file_offset)
1510 {
1511 struct perf_sample sample;
1512 int ret;
1513
1514 ret = perf_evlist__parse_sample(session->evlist, event, &sample);
1515 if (ret) {
1516 pr_err("Can't parse sample, err = %d\n", ret);
1517 return ret;
1518 }
1519
1520 ret = auxtrace__process_event(session, event, &sample, tool);
1521 if (ret < 0)
1522 return ret;
1523 if (ret > 0)
1524 return 0;
1525
1526 ret = machines__deliver_event(&session->machines, session->evlist,
1527 event, &sample, tool, file_offset);
1528
1529 if (dump_trace && sample.aux_sample.size)
1530 auxtrace__dump_auxtrace_sample(session, &sample);
1531
1532 return ret;
1533 }
1534
1535 static s64 perf_session__process_user_event(struct perf_session *session,
1536 union perf_event *event,
1537 u64 file_offset)
1538 {
1539 struct ordered_events *oe = &session->ordered_events;
1540 struct perf_tool *tool = session->tool;
1541 struct perf_sample sample = { .time = 0, };
1542 int fd = perf_data__fd(session->data);
1543 int err;
1544
1545 if (event->header.type != PERF_RECORD_COMPRESSED ||
1546 tool->compressed == perf_session__process_compressed_event_stub)
1547 dump_event(session->evlist, event, file_offset, &sample);
1548
1549 /* These events are processed right away */
1550 switch (event->header.type) {
1551 case PERF_RECORD_HEADER_ATTR:
1552 err = tool->attr(tool, event, &session->evlist);
1553 if (err == 0) {
1554 perf_session__set_id_hdr_size(session);
1555 perf_session__set_comm_exec(session);
1556 }
1557 return err;
1558 case PERF_RECORD_EVENT_UPDATE:
1559 return tool->event_update(tool, event, &session->evlist);
1560 case PERF_RECORD_HEADER_EVENT_TYPE:
1561 /*
1562 * Depreceated, but we need to handle it for sake
1563 * of old data files create in pipe mode.
1564 */
1565 return 0;
1566 case PERF_RECORD_HEADER_TRACING_DATA:
1567 /*
1568 * Setup for reading amidst mmap, but only when we
1569 * are in 'file' mode. The 'pipe' fd is in proper
1570 * place already.
1571 */
1572 if (!perf_data__is_pipe(session->data))
1573 lseek(fd, file_offset, SEEK_SET);
1574 return tool->tracing_data(session, event);
1575 case PERF_RECORD_HEADER_BUILD_ID:
1576 return tool->build_id(session, event);
1577 case PERF_RECORD_FINISHED_ROUND:
1578 return tool->finished_round(tool, event, oe);
1579 case PERF_RECORD_ID_INDEX:
1580 return tool->id_index(session, event);
1581 case PERF_RECORD_AUXTRACE_INFO:
1582 return tool->auxtrace_info(session, event);
1583 case PERF_RECORD_AUXTRACE:
1584 /* setup for reading amidst mmap */
1585 lseek(fd, file_offset + event->header.size, SEEK_SET);
1586 return tool->auxtrace(session, event);
1587 case PERF_RECORD_AUXTRACE_ERROR:
1588 perf_session__auxtrace_error_inc(session, event);
1589 return tool->auxtrace_error(session, event);
1590 case PERF_RECORD_THREAD_MAP:
1591 return tool->thread_map(session, event);
1592 case PERF_RECORD_CPU_MAP:
1593 return tool->cpu_map(session, event);
1594 case PERF_RECORD_STAT_CONFIG:
1595 return tool->stat_config(session, event);
1596 case PERF_RECORD_STAT:
1597 return tool->stat(session, event);
1598 case PERF_RECORD_STAT_ROUND:
1599 return tool->stat_round(session, event);
1600 case PERF_RECORD_TIME_CONV:
1601 session->time_conv = event->time_conv;
1602 return tool->time_conv(session, event);
1603 case PERF_RECORD_HEADER_FEATURE:
1604 return tool->feature(session, event);
1605 case PERF_RECORD_COMPRESSED:
1606 err = tool->compressed(session, event, file_offset);
1607 if (err)
1608 dump_event(session->evlist, event, file_offset, &sample);
1609 return err;
1610 default:
1611 return -EINVAL;
1612 }
1613 }
1614
1615 int perf_session__deliver_synth_event(struct perf_session *session,
1616 union perf_event *event,
1617 struct perf_sample *sample)
1618 {
1619 struct evlist *evlist = session->evlist;
1620 struct perf_tool *tool = session->tool;
1621
1622 events_stats__inc(&evlist->stats, event->header.type);
1623
1624 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1625 return perf_session__process_user_event(session, event, 0);
1626
1627 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0);
1628 }
1629
1630 static void event_swap(union perf_event *event, bool sample_id_all)
1631 {
1632 perf_event__swap_op swap;
1633
1634 swap = perf_event__swap_ops[event->header.type];
1635 if (swap)
1636 swap(event, sample_id_all);
1637 }
1638
1639 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1640 void *buf, size_t buf_sz,
1641 union perf_event **event_ptr,
1642 struct perf_sample *sample)
1643 {
1644 union perf_event *event;
1645 size_t hdr_sz, rest;
1646 int fd;
1647
1648 if (session->one_mmap && !session->header.needs_swap) {
1649 event = file_offset - session->one_mmap_offset +
1650 session->one_mmap_addr;
1651 goto out_parse_sample;
1652 }
1653
1654 if (perf_data__is_pipe(session->data))
1655 return -1;
1656
1657 fd = perf_data__fd(session->data);
1658 hdr_sz = sizeof(struct perf_event_header);
1659
1660 if (buf_sz < hdr_sz)
1661 return -1;
1662
1663 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1664 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1665 return -1;
1666
1667 event = (union perf_event *)buf;
1668
1669 if (session->header.needs_swap)
1670 perf_event_header__bswap(&event->header);
1671
1672 if (event->header.size < hdr_sz || event->header.size > buf_sz)
1673 return -1;
1674
1675 rest = event->header.size - hdr_sz;
1676
1677 if (readn(fd, buf, rest) != (ssize_t)rest)
1678 return -1;
1679
1680 if (session->header.needs_swap)
1681 event_swap(event, evlist__sample_id_all(session->evlist));
1682
1683 out_parse_sample:
1684
1685 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1686 perf_evlist__parse_sample(session->evlist, event, sample))
1687 return -1;
1688
1689 *event_ptr = event;
1690
1691 return 0;
1692 }
1693
1694 int perf_session__peek_events(struct perf_session *session, u64 offset,
1695 u64 size, peek_events_cb_t cb, void *data)
1696 {
1697 u64 max_offset = offset + size;
1698 char buf[PERF_SAMPLE_MAX_SIZE];
1699 union perf_event *event;
1700 int err;
1701
1702 do {
1703 err = perf_session__peek_event(session, offset, buf,
1704 PERF_SAMPLE_MAX_SIZE, &event,
1705 NULL);
1706 if (err)
1707 return err;
1708
1709 err = cb(session, event, offset, data);
1710 if (err)
1711 return err;
1712
1713 offset += event->header.size;
1714 if (event->header.type == PERF_RECORD_AUXTRACE)
1715 offset += event->auxtrace.size;
1716
1717 } while (offset < max_offset);
1718
1719 return err;
1720 }
1721
1722 static s64 perf_session__process_event(struct perf_session *session,
1723 union perf_event *event, u64 file_offset)
1724 {
1725 struct evlist *evlist = session->evlist;
1726 struct perf_tool *tool = session->tool;
1727 int ret;
1728
1729 if (session->header.needs_swap)
1730 event_swap(event, evlist__sample_id_all(evlist));
1731
1732 if (event->header.type >= PERF_RECORD_HEADER_MAX)
1733 return -EINVAL;
1734
1735 events_stats__inc(&evlist->stats, event->header.type);
1736
1737 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1738 return perf_session__process_user_event(session, event, file_offset);
1739
1740 if (tool->ordered_events) {
1741 u64 timestamp = -1ULL;
1742
1743 ret = perf_evlist__parse_sample_timestamp(evlist, event, &timestamp);
1744 if (ret && ret != -1)
1745 return ret;
1746
1747 ret = perf_session__queue_event(session, event, timestamp, file_offset);
1748 if (ret != -ETIME)
1749 return ret;
1750 }
1751
1752 return perf_session__deliver_event(session, event, tool, file_offset);
1753 }
1754
1755 void perf_event_header__bswap(struct perf_event_header *hdr)
1756 {
1757 hdr->type = bswap_32(hdr->type);
1758 hdr->misc = bswap_16(hdr->misc);
1759 hdr->size = bswap_16(hdr->size);
1760 }
1761
1762 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1763 {
1764 return machine__findnew_thread(&session->machines.host, -1, pid);
1765 }
1766
1767 /*
1768 * Threads are identified by pid and tid, and the idle task has pid == tid == 0.
1769 * So here a single thread is created for that, but actually there is a separate
1770 * idle task per cpu, so there should be one 'struct thread' per cpu, but there
1771 * is only 1. That causes problems for some tools, requiring workarounds. For
1772 * example get_idle_thread() in builtin-sched.c, or thread_stack__per_cpu().
1773 */
1774 int perf_session__register_idle_thread(struct perf_session *session)
1775 {
1776 struct thread *thread;
1777 int err = 0;
1778
1779 thread = machine__findnew_thread(&session->machines.host, 0, 0);
1780 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1781 pr_err("problem inserting idle task.\n");
1782 err = -1;
1783 }
1784
1785 if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) {
1786 pr_err("problem inserting idle task.\n");
1787 err = -1;
1788 }
1789
1790 /* machine__findnew_thread() got the thread, so put it */
1791 thread__put(thread);
1792 return err;
1793 }
1794
1795 static void
1796 perf_session__warn_order(const struct perf_session *session)
1797 {
1798 const struct ordered_events *oe = &session->ordered_events;
1799 struct evsel *evsel;
1800 bool should_warn = true;
1801
1802 evlist__for_each_entry(session->evlist, evsel) {
1803 if (evsel->core.attr.write_backward)
1804 should_warn = false;
1805 }
1806
1807 if (!should_warn)
1808 return;
1809 if (oe->nr_unordered_events != 0)
1810 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1811 }
1812
1813 static void perf_session__warn_about_errors(const struct perf_session *session)
1814 {
1815 const struct events_stats *stats = &session->evlist->stats;
1816
1817 if (session->tool->lost == perf_event__process_lost &&
1818 stats->nr_events[PERF_RECORD_LOST] != 0) {
1819 ui__warning("Processed %d events and lost %d chunks!\n\n"
1820 "Check IO/CPU overload!\n\n",
1821 stats->nr_events[0],
1822 stats->nr_events[PERF_RECORD_LOST]);
1823 }
1824
1825 if (session->tool->lost_samples == perf_event__process_lost_samples) {
1826 double drop_rate;
1827
1828 drop_rate = (double)stats->total_lost_samples /
1829 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1830 if (drop_rate > 0.05) {
1831 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n",
1832 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1833 drop_rate * 100.0);
1834 }
1835 }
1836
1837 if (session->tool->aux == perf_event__process_aux &&
1838 stats->total_aux_lost != 0) {
1839 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1840 stats->total_aux_lost,
1841 stats->nr_events[PERF_RECORD_AUX]);
1842 }
1843
1844 if (session->tool->aux == perf_event__process_aux &&
1845 stats->total_aux_partial != 0) {
1846 bool vmm_exclusive = false;
1847
1848 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive",
1849 &vmm_exclusive);
1850
1851 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n"
1852 "Are you running a KVM guest in the background?%s\n\n",
1853 stats->total_aux_partial,
1854 stats->nr_events[PERF_RECORD_AUX],
1855 vmm_exclusive ?
1856 "\nReloading kvm_intel module with vmm_exclusive=0\n"
1857 "will reduce the gaps to only guest's timeslices." :
1858 "");
1859 }
1860
1861 if (stats->nr_unknown_events != 0) {
1862 ui__warning("Found %u unknown events!\n\n"
1863 "Is this an older tool processing a perf.data "
1864 "file generated by a more recent tool?\n\n"
1865 "If that is not the case, consider "
1866 "reporting to linux-kernel@vger.kernel.org.\n\n",
1867 stats->nr_unknown_events);
1868 }
1869
1870 if (stats->nr_unknown_id != 0) {
1871 ui__warning("%u samples with id not present in the header\n",
1872 stats->nr_unknown_id);
1873 }
1874
1875 if (stats->nr_invalid_chains != 0) {
1876 ui__warning("Found invalid callchains!\n\n"
1877 "%u out of %u events were discarded for this reason.\n\n"
1878 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1879 stats->nr_invalid_chains,
1880 stats->nr_events[PERF_RECORD_SAMPLE]);
1881 }
1882
1883 if (stats->nr_unprocessable_samples != 0) {
1884 ui__warning("%u unprocessable samples recorded.\n"
1885 "Do you have a KVM guest running and not using 'perf kvm'?\n",
1886 stats->nr_unprocessable_samples);
1887 }
1888
1889 perf_session__warn_order(session);
1890
1891 events_stats__auxtrace_error_warn(stats);
1892
1893 if (stats->nr_proc_map_timeout != 0) {
1894 ui__warning("%d map information files for pre-existing threads were\n"
1895 "not processed, if there are samples for addresses they\n"
1896 "will not be resolved, you may find out which are these\n"
1897 "threads by running with -v and redirecting the output\n"
1898 "to a file.\n"
1899 "The time limit to process proc map is too short?\n"
1900 "Increase it by --proc-map-timeout\n",
1901 stats->nr_proc_map_timeout);
1902 }
1903 }
1904
1905 static int perf_session__flush_thread_stack(struct thread *thread,
1906 void *p __maybe_unused)
1907 {
1908 return thread_stack__flush(thread);
1909 }
1910
1911 static int perf_session__flush_thread_stacks(struct perf_session *session)
1912 {
1913 return machines__for_each_thread(&session->machines,
1914 perf_session__flush_thread_stack,
1915 NULL);
1916 }
1917
1918 volatile int session_done;
1919
1920 static int __perf_session__process_decomp_events(struct perf_session *session);
1921
1922 static int __perf_session__process_pipe_events(struct perf_session *session)
1923 {
1924 struct ordered_events *oe = &session->ordered_events;
1925 struct perf_tool *tool = session->tool;
1926 int fd = perf_data__fd(session->data);
1927 union perf_event *event;
1928 uint32_t size, cur_size = 0;
1929 void *buf = NULL;
1930 s64 skip = 0;
1931 u64 head;
1932 ssize_t err;
1933 void *p;
1934
1935 perf_tool__fill_defaults(tool);
1936
1937 head = 0;
1938 cur_size = sizeof(union perf_event);
1939
1940 buf = malloc(cur_size);
1941 if (!buf)
1942 return -errno;
1943 ordered_events__set_copy_on_queue(oe, true);
1944 more:
1945 event = buf;
1946 err = readn(fd, event, sizeof(struct perf_event_header));
1947 if (err <= 0) {
1948 if (err == 0)
1949 goto done;
1950
1951 pr_err("failed to read event header\n");
1952 goto out_err;
1953 }
1954
1955 if (session->header.needs_swap)
1956 perf_event_header__bswap(&event->header);
1957
1958 size = event->header.size;
1959 if (size < sizeof(struct perf_event_header)) {
1960 pr_err("bad event header size\n");
1961 goto out_err;
1962 }
1963
1964 if (size > cur_size) {
1965 void *new = realloc(buf, size);
1966 if (!new) {
1967 pr_err("failed to allocate memory to read event\n");
1968 goto out_err;
1969 }
1970 buf = new;
1971 cur_size = size;
1972 event = buf;
1973 }
1974 p = event;
1975 p += sizeof(struct perf_event_header);
1976
1977 if (size - sizeof(struct perf_event_header)) {
1978 err = readn(fd, p, size - sizeof(struct perf_event_header));
1979 if (err <= 0) {
1980 if (err == 0) {
1981 pr_err("unexpected end of event stream\n");
1982 goto done;
1983 }
1984
1985 pr_err("failed to read event data\n");
1986 goto out_err;
1987 }
1988 }
1989
1990 if ((skip = perf_session__process_event(session, event, head)) < 0) {
1991 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1992 head, event->header.size, event->header.type);
1993 err = -EINVAL;
1994 goto out_err;
1995 }
1996
1997 head += size;
1998
1999 if (skip > 0)
2000 head += skip;
2001
2002 err = __perf_session__process_decomp_events(session);
2003 if (err)
2004 goto out_err;
2005
2006 if (!session_done())
2007 goto more;
2008 done:
2009 /* do the final flush for ordered samples */
2010 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
2011 if (err)
2012 goto out_err;
2013 err = auxtrace__flush_events(session, tool);
2014 if (err)
2015 goto out_err;
2016 err = perf_session__flush_thread_stacks(session);
2017 out_err:
2018 free(buf);
2019 if (!tool->no_warn)
2020 perf_session__warn_about_errors(session);
2021 ordered_events__free(&session->ordered_events);
2022 auxtrace__free_events(session);
2023 return err;
2024 }
2025
2026 static union perf_event *
2027 prefetch_event(char *buf, u64 head, size_t mmap_size,
2028 bool needs_swap, union perf_event *error)
2029 {
2030 union perf_event *event;
2031
2032 /*
2033 * Ensure we have enough space remaining to read
2034 * the size of the event in the headers.
2035 */
2036 if (head + sizeof(event->header) > mmap_size)
2037 return NULL;
2038
2039 event = (union perf_event *)(buf + head);
2040 if (needs_swap)
2041 perf_event_header__bswap(&event->header);
2042
2043 if (head + event->header.size <= mmap_size)
2044 return event;
2045
2046 /* We're not fetching the event so swap back again */
2047 if (needs_swap)
2048 perf_event_header__bswap(&event->header);
2049
2050 pr_debug("%s: head=%#" PRIx64 " event->header_size=%#x, mmap_size=%#zx:"
2051 " fuzzed or compressed perf.data?\n",__func__, head, event->header.size, mmap_size);
2052
2053 return error;
2054 }
2055
2056 static union perf_event *
2057 fetch_mmaped_event(u64 head, size_t mmap_size, char *buf, bool needs_swap)
2058 {
2059 return prefetch_event(buf, head, mmap_size, needs_swap, ERR_PTR(-EINVAL));
2060 }
2061
2062 static union perf_event *
2063 fetch_decomp_event(u64 head, size_t mmap_size, char *buf, bool needs_swap)
2064 {
2065 return prefetch_event(buf, head, mmap_size, needs_swap, NULL);
2066 }
2067
2068 static int __perf_session__process_decomp_events(struct perf_session *session)
2069 {
2070 s64 skip;
2071 u64 size, file_pos = 0;
2072 struct decomp *decomp = session->decomp_last;
2073
2074 if (!decomp)
2075 return 0;
2076
2077 while (decomp->head < decomp->size && !session_done()) {
2078 union perf_event *event = fetch_decomp_event(decomp->head, decomp->size, decomp->data,
2079 session->header.needs_swap);
2080
2081 if (!event)
2082 break;
2083
2084 size = event->header.size;
2085
2086 if (size < sizeof(struct perf_event_header) ||
2087 (skip = perf_session__process_event(session, event, file_pos)) < 0) {
2088 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
2089 decomp->file_pos + decomp->head, event->header.size, event->header.type);
2090 return -EINVAL;
2091 }
2092
2093 if (skip)
2094 size += skip;
2095
2096 decomp->head += size;
2097 }
2098
2099 return 0;
2100 }
2101
2102 /*
2103 * On 64bit we can mmap the data file in one go. No need for tiny mmap
2104 * slices. On 32bit we use 32MB.
2105 */
2106 #if BITS_PER_LONG == 64
2107 #define MMAP_SIZE ULLONG_MAX
2108 #define NUM_MMAPS 1
2109 #else
2110 #define MMAP_SIZE (32 * 1024 * 1024ULL)
2111 #define NUM_MMAPS 128
2112 #endif
2113
2114 struct reader;
2115
2116 typedef s64 (*reader_cb_t)(struct perf_session *session,
2117 union perf_event *event,
2118 u64 file_offset);
2119
2120 struct reader {
2121 int fd;
2122 u64 data_size;
2123 u64 data_offset;
2124 reader_cb_t process;
2125 };
2126
2127 static int
2128 reader__process_events(struct reader *rd, struct perf_session *session,
2129 struct ui_progress *prog)
2130 {
2131 u64 data_size = rd->data_size;
2132 u64 head, page_offset, file_offset, file_pos, size;
2133 int err = 0, mmap_prot, mmap_flags, map_idx = 0;
2134 size_t mmap_size;
2135 char *buf, *mmaps[NUM_MMAPS];
2136 union perf_event *event;
2137 s64 skip;
2138
2139 page_offset = page_size * (rd->data_offset / page_size);
2140 file_offset = page_offset;
2141 head = rd->data_offset - page_offset;
2142
2143 ui_progress__init_size(prog, data_size, "Processing events...");
2144
2145 data_size += rd->data_offset;
2146
2147 mmap_size = MMAP_SIZE;
2148 if (mmap_size > data_size) {
2149 mmap_size = data_size;
2150 session->one_mmap = true;
2151 }
2152
2153 memset(mmaps, 0, sizeof(mmaps));
2154
2155 mmap_prot = PROT_READ;
2156 mmap_flags = MAP_SHARED;
2157
2158 if (session->header.needs_swap) {
2159 mmap_prot |= PROT_WRITE;
2160 mmap_flags = MAP_PRIVATE;
2161 }
2162 remap:
2163 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, rd->fd,
2164 file_offset);
2165 if (buf == MAP_FAILED) {
2166 pr_err("failed to mmap file\n");
2167 err = -errno;
2168 goto out;
2169 }
2170 mmaps[map_idx] = buf;
2171 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
2172 file_pos = file_offset + head;
2173 if (session->one_mmap) {
2174 session->one_mmap_addr = buf;
2175 session->one_mmap_offset = file_offset;
2176 }
2177
2178 more:
2179 event = fetch_mmaped_event(head, mmap_size, buf, session->header.needs_swap);
2180 if (IS_ERR(event))
2181 return PTR_ERR(event);
2182
2183 if (!event) {
2184 if (mmaps[map_idx]) {
2185 munmap(mmaps[map_idx], mmap_size);
2186 mmaps[map_idx] = NULL;
2187 }
2188
2189 page_offset = page_size * (head / page_size);
2190 file_offset += page_offset;
2191 head -= page_offset;
2192 goto remap;
2193 }
2194
2195 size = event->header.size;
2196
2197 skip = -EINVAL;
2198
2199 if (size < sizeof(struct perf_event_header) ||
2200 (skip = rd->process(session, event, file_pos)) < 0) {
2201 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n",
2202 file_offset + head, event->header.size,
2203 event->header.type, strerror(-skip));
2204 err = skip;
2205 goto out;
2206 }
2207
2208 if (skip)
2209 size += skip;
2210
2211 head += size;
2212 file_pos += size;
2213
2214 err = __perf_session__process_decomp_events(session);
2215 if (err)
2216 goto out;
2217
2218 ui_progress__update(prog, size);
2219
2220 if (session_done())
2221 goto out;
2222
2223 if (file_pos < data_size)
2224 goto more;
2225
2226 out:
2227 return err;
2228 }
2229
2230 static s64 process_simple(struct perf_session *session,
2231 union perf_event *event,
2232 u64 file_offset)
2233 {
2234 return perf_session__process_event(session, event, file_offset);
2235 }
2236
2237 static int __perf_session__process_events(struct perf_session *session)
2238 {
2239 struct reader rd = {
2240 .fd = perf_data__fd(session->data),
2241 .data_size = session->header.data_size,
2242 .data_offset = session->header.data_offset,
2243 .process = process_simple,
2244 };
2245 struct ordered_events *oe = &session->ordered_events;
2246 struct perf_tool *tool = session->tool;
2247 struct ui_progress prog;
2248 int err;
2249
2250 perf_tool__fill_defaults(tool);
2251
2252 if (rd.data_size == 0)
2253 return -1;
2254
2255 ui_progress__init_size(&prog, rd.data_size, "Processing events...");
2256
2257 err = reader__process_events(&rd, session, &prog);
2258 if (err)
2259 goto out_err;
2260 /* do the final flush for ordered samples */
2261 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
2262 if (err)
2263 goto out_err;
2264 err = auxtrace__flush_events(session, tool);
2265 if (err)
2266 goto out_err;
2267 err = perf_session__flush_thread_stacks(session);
2268 out_err:
2269 ui_progress__finish();
2270 if (!tool->no_warn)
2271 perf_session__warn_about_errors(session);
2272 /*
2273 * We may switching perf.data output, make ordered_events
2274 * reusable.
2275 */
2276 ordered_events__reinit(&session->ordered_events);
2277 auxtrace__free_events(session);
2278 session->one_mmap = false;
2279 return err;
2280 }
2281
2282 int perf_session__process_events(struct perf_session *session)
2283 {
2284 if (perf_session__register_idle_thread(session) < 0)
2285 return -ENOMEM;
2286
2287 if (perf_data__is_pipe(session->data))
2288 return __perf_session__process_pipe_events(session);
2289
2290 return __perf_session__process_events(session);
2291 }
2292
2293 bool perf_session__has_traces(struct perf_session *session, const char *msg)
2294 {
2295 struct evsel *evsel;
2296
2297 evlist__for_each_entry(session->evlist, evsel) {
2298 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT)
2299 return true;
2300 }
2301
2302 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
2303 return false;
2304 }
2305
2306 int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr)
2307 {
2308 char *bracket;
2309 struct ref_reloc_sym *ref;
2310 struct kmap *kmap;
2311
2312 ref = zalloc(sizeof(struct ref_reloc_sym));
2313 if (ref == NULL)
2314 return -ENOMEM;
2315
2316 ref->name = strdup(symbol_name);
2317 if (ref->name == NULL) {
2318 free(ref);
2319 return -ENOMEM;
2320 }
2321
2322 bracket = strchr(ref->name, ']');
2323 if (bracket)
2324 *bracket = '\0';
2325
2326 ref->addr = addr;
2327
2328 kmap = map__kmap(map);
2329 if (kmap)
2330 kmap->ref_reloc_sym = ref;
2331
2332 return 0;
2333 }
2334
2335 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
2336 {
2337 return machines__fprintf_dsos(&session->machines, fp);
2338 }
2339
2340 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
2341 bool (skip)(struct dso *dso, int parm), int parm)
2342 {
2343 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
2344 }
2345
2346 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
2347 {
2348 size_t ret;
2349 const char *msg = "";
2350
2351 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
2352 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
2353
2354 ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
2355
2356 ret += events_stats__fprintf(&session->evlist->stats, fp);
2357 return ret;
2358 }
2359
2360 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
2361 {
2362 /*
2363 * FIXME: Here we have to actually print all the machines in this
2364 * session, not just the host...
2365 */
2366 return machine__fprintf(&session->machines.host, fp);
2367 }
2368
2369 struct evsel *perf_session__find_first_evtype(struct perf_session *session,
2370 unsigned int type)
2371 {
2372 struct evsel *pos;
2373
2374 evlist__for_each_entry(session->evlist, pos) {
2375 if (pos->core.attr.type == type)
2376 return pos;
2377 }
2378 return NULL;
2379 }
2380
2381 int perf_session__cpu_bitmap(struct perf_session *session,
2382 const char *cpu_list, unsigned long *cpu_bitmap)
2383 {
2384 int i, err = -1;
2385 struct perf_cpu_map *map;
2386 int nr_cpus = min(session->header.env.nr_cpus_online, MAX_NR_CPUS);
2387
2388 for (i = 0; i < PERF_TYPE_MAX; ++i) {
2389 struct evsel *evsel;
2390
2391 evsel = perf_session__find_first_evtype(session, i);
2392 if (!evsel)
2393 continue;
2394
2395 if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CPU)) {
2396 pr_err("File does not contain CPU events. "
2397 "Remove -C option to proceed.\n");
2398 return -1;
2399 }
2400 }
2401
2402 map = perf_cpu_map__new(cpu_list);
2403 if (map == NULL) {
2404 pr_err("Invalid cpu_list\n");
2405 return -1;
2406 }
2407
2408 for (i = 0; i < map->nr; i++) {
2409 int cpu = map->map[i];
2410
2411 if (cpu >= nr_cpus) {
2412 pr_err("Requested CPU %d too large. "
2413 "Consider raising MAX_NR_CPUS\n", cpu);
2414 goto out_delete_map;
2415 }
2416
2417 set_bit(cpu, cpu_bitmap);
2418 }
2419
2420 err = 0;
2421
2422 out_delete_map:
2423 perf_cpu_map__put(map);
2424 return err;
2425 }
2426
2427 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
2428 bool full)
2429 {
2430 if (session == NULL || fp == NULL)
2431 return;
2432
2433 fprintf(fp, "# ========\n");
2434 perf_header__fprintf_info(session, fp, full);
2435 fprintf(fp, "# ========\n#\n");
2436 }
2437
2438 int perf_event__process_id_index(struct perf_session *session,
2439 union perf_event *event)
2440 {
2441 struct evlist *evlist = session->evlist;
2442 struct perf_record_id_index *ie = &event->id_index;
2443 size_t i, nr, max_nr;
2444
2445 max_nr = (ie->header.size - sizeof(struct perf_record_id_index)) /
2446 sizeof(struct id_index_entry);
2447 nr = ie->nr;
2448 if (nr > max_nr)
2449 return -EINVAL;
2450
2451 if (dump_trace)
2452 fprintf(stdout, " nr: %zu\n", nr);
2453
2454 for (i = 0; i < nr; i++) {
2455 struct id_index_entry *e = &ie->entries[i];
2456 struct perf_sample_id *sid;
2457
2458 if (dump_trace) {
2459 fprintf(stdout, " ... id: %"PRI_lu64, e->id);
2460 fprintf(stdout, " idx: %"PRI_lu64, e->idx);
2461 fprintf(stdout, " cpu: %"PRI_ld64, e->cpu);
2462 fprintf(stdout, " tid: %"PRI_ld64"\n", e->tid);
2463 }
2464
2465 sid = perf_evlist__id2sid(evlist, e->id);
2466 if (!sid)
2467 return -ENOENT;
2468 sid->idx = e->idx;
2469 sid->cpu = e->cpu;
2470 sid->tid = e->tid;
2471 }
2472 return 0;
2473 }
Linux with added FPC-III support