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x86/fpu/xstate: Restore supervisor states for signal return
[thirdparty/linux.git] / tools / perf / util / session.c
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 #include <linux/err.h>
37
38 #ifdef HAVE_ZSTD_SUPPORT
39 static int perf_session__process_compressed_event(struct perf_session *session,
40 union perf_event *event, u64 file_offset)
41 {
42 void *src;
43 size_t decomp_size, src_size;
44 u64 decomp_last_rem = 0;
45 size_t mmap_len, decomp_len = session->header.env.comp_mmap_len;
46 struct decomp *decomp, *decomp_last = session->decomp_last;
47
48 if (decomp_last) {
49 decomp_last_rem = decomp_last->size - decomp_last->head;
50 decomp_len += decomp_last_rem;
51 }
52
53 mmap_len = sizeof(struct decomp) + decomp_len;
54 decomp = mmap(NULL, mmap_len, PROT_READ|PROT_WRITE,
55 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
56 if (decomp == MAP_FAILED) {
57 pr_err("Couldn't allocate memory for decompression\n");
58 return -1;
59 }
60
61 decomp->file_pos = file_offset;
62 decomp->mmap_len = mmap_len;
63 decomp->head = 0;
64
65 if (decomp_last_rem) {
66 memcpy(decomp->data, &(decomp_last->data[decomp_last->head]), decomp_last_rem);
67 decomp->size = decomp_last_rem;
68 }
69
70 src = (void *)event + sizeof(struct perf_record_compressed);
71 src_size = event->pack.header.size - sizeof(struct perf_record_compressed);
72
73 decomp_size = zstd_decompress_stream(&(session->zstd_data), src, src_size,
74 &(decomp->data[decomp_last_rem]), decomp_len - decomp_last_rem);
75 if (!decomp_size) {
76 munmap(decomp, mmap_len);
77 pr_err("Couldn't decompress data\n");
78 return -1;
79 }
80
81 decomp->size += decomp_size;
82
83 if (session->decomp == NULL) {
84 session->decomp = decomp;
85 session->decomp_last = decomp;
86 } else {
87 session->decomp_last->next = decomp;
88 session->decomp_last = decomp;
89 }
90
91 pr_debug("decomp (B): %ld to %ld\n", src_size, decomp_size);
92
93 return 0;
94 }
95 #else /* !HAVE_ZSTD_SUPPORT */
96 #define perf_session__process_compressed_event perf_session__process_compressed_event_stub
97 #endif
98
99 static int perf_session__deliver_event(struct perf_session *session,
100 union perf_event *event,
101 struct perf_tool *tool,
102 u64 file_offset);
103
104 static int perf_session__open(struct perf_session *session)
105 {
106 struct perf_data *data = session->data;
107
108 if (perf_session__read_header(session) < 0) {
109 pr_err("incompatible file format (rerun with -v to learn more)\n");
110 return -1;
111 }
112
113 if (perf_data__is_pipe(data))
114 return 0;
115
116 if (perf_header__has_feat(&session->header, HEADER_STAT))
117 return 0;
118
119 if (!perf_evlist__valid_sample_type(session->evlist)) {
120 pr_err("non matching sample_type\n");
121 return -1;
122 }
123
124 if (!perf_evlist__valid_sample_id_all(session->evlist)) {
125 pr_err("non matching sample_id_all\n");
126 return -1;
127 }
128
129 if (!perf_evlist__valid_read_format(session->evlist)) {
130 pr_err("non matching read_format\n");
131 return -1;
132 }
133
134 return 0;
135 }
136
137 void perf_session__set_id_hdr_size(struct perf_session *session)
138 {
139 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
140
141 machines__set_id_hdr_size(&session->machines, id_hdr_size);
142 }
143
144 int perf_session__create_kernel_maps(struct perf_session *session)
145 {
146 int ret = machine__create_kernel_maps(&session->machines.host);
147
148 if (ret >= 0)
149 ret = machines__create_guest_kernel_maps(&session->machines);
150 return ret;
151 }
152
153 static void perf_session__destroy_kernel_maps(struct perf_session *session)
154 {
155 machines__destroy_kernel_maps(&session->machines);
156 }
157
158 static bool perf_session__has_comm_exec(struct perf_session *session)
159 {
160 struct evsel *evsel;
161
162 evlist__for_each_entry(session->evlist, evsel) {
163 if (evsel->core.attr.comm_exec)
164 return true;
165 }
166
167 return false;
168 }
169
170 static void perf_session__set_comm_exec(struct perf_session *session)
171 {
172 bool comm_exec = perf_session__has_comm_exec(session);
173
174 machines__set_comm_exec(&session->machines, comm_exec);
175 }
176
177 static int ordered_events__deliver_event(struct ordered_events *oe,
178 struct ordered_event *event)
179 {
180 struct perf_session *session = container_of(oe, struct perf_session,
181 ordered_events);
182
183 return perf_session__deliver_event(session, event->event,
184 session->tool, event->file_offset);
185 }
186
187 struct perf_session *perf_session__new(struct perf_data *data,
188 bool repipe, struct perf_tool *tool)
189 {
190 int ret = -ENOMEM;
191 struct perf_session *session = zalloc(sizeof(*session));
192
193 if (!session)
194 goto out;
195
196 session->repipe = repipe;
197 session->tool = tool;
198 INIT_LIST_HEAD(&session->auxtrace_index);
199 machines__init(&session->machines);
200 ordered_events__init(&session->ordered_events,
201 ordered_events__deliver_event, NULL);
202
203 perf_env__init(&session->header.env);
204 if (data) {
205 ret = perf_data__open(data);
206 if (ret < 0)
207 goto out_delete;
208
209 session->data = data;
210
211 if (perf_data__is_read(data)) {
212 ret = perf_session__open(session);
213 if (ret < 0)
214 goto out_delete;
215
216 /*
217 * set session attributes that are present in perf.data
218 * but not in pipe-mode.
219 */
220 if (!data->is_pipe) {
221 perf_session__set_id_hdr_size(session);
222 perf_session__set_comm_exec(session);
223 }
224
225 perf_evlist__init_trace_event_sample_raw(session->evlist);
226
227 /* Open the directory data. */
228 if (data->is_dir) {
229 ret = perf_data__open_dir(data);
230 if (ret)
231 goto out_delete;
232 }
233
234 if (!symbol_conf.kallsyms_name &&
235 !symbol_conf.vmlinux_name)
236 symbol_conf.kallsyms_name = perf_data__kallsyms_name(data);
237 }
238 } else {
239 session->machines.host.env = &perf_env;
240 }
241
242 session->machines.host.single_address_space =
243 perf_env__single_address_space(session->machines.host.env);
244
245 if (!data || perf_data__is_write(data)) {
246 /*
247 * In O_RDONLY mode this will be performed when reading the
248 * kernel MMAP event, in perf_event__process_mmap().
249 */
250 if (perf_session__create_kernel_maps(session) < 0)
251 pr_warning("Cannot read kernel map\n");
252 }
253
254 /*
255 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is
256 * processed, so perf_evlist__sample_id_all is not meaningful here.
257 */
258 if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps &&
259 tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) {
260 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
261 tool->ordered_events = false;
262 }
263
264 return session;
265
266 out_delete:
267 perf_session__delete(session);
268 out:
269 return ERR_PTR(ret);
270 }
271
272 static void perf_session__delete_threads(struct perf_session *session)
273 {
274 machine__delete_threads(&session->machines.host);
275 }
276
277 static void perf_session__release_decomp_events(struct perf_session *session)
278 {
279 struct decomp *next, *decomp;
280 size_t mmap_len;
281 next = session->decomp;
282 do {
283 decomp = next;
284 if (decomp == NULL)
285 break;
286 next = decomp->next;
287 mmap_len = decomp->mmap_len;
288 munmap(decomp, mmap_len);
289 } while (1);
290 }
291
292 void perf_session__delete(struct perf_session *session)
293 {
294 if (session == NULL)
295 return;
296 auxtrace__free(session);
297 auxtrace_index__free(&session->auxtrace_index);
298 perf_session__destroy_kernel_maps(session);
299 perf_session__delete_threads(session);
300 perf_session__release_decomp_events(session);
301 perf_env__exit(&session->header.env);
302 machines__exit(&session->machines);
303 if (session->data)
304 perf_data__close(session->data);
305 free(session);
306 }
307
308 static int process_event_synth_tracing_data_stub(struct perf_session *session
309 __maybe_unused,
310 union perf_event *event
311 __maybe_unused)
312 {
313 dump_printf(": unhandled!\n");
314 return 0;
315 }
316
317 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
318 union perf_event *event __maybe_unused,
319 struct evlist **pevlist
320 __maybe_unused)
321 {
322 dump_printf(": unhandled!\n");
323 return 0;
324 }
325
326 static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused,
327 union perf_event *event __maybe_unused,
328 struct evlist **pevlist
329 __maybe_unused)
330 {
331 if (dump_trace)
332 perf_event__fprintf_event_update(event, stdout);
333
334 dump_printf(": unhandled!\n");
335 return 0;
336 }
337
338 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
339 union perf_event *event __maybe_unused,
340 struct perf_sample *sample __maybe_unused,
341 struct evsel *evsel __maybe_unused,
342 struct machine *machine __maybe_unused)
343 {
344 dump_printf(": unhandled!\n");
345 return 0;
346 }
347
348 static int process_event_stub(struct perf_tool *tool __maybe_unused,
349 union perf_event *event __maybe_unused,
350 struct perf_sample *sample __maybe_unused,
351 struct machine *machine __maybe_unused)
352 {
353 dump_printf(": unhandled!\n");
354 return 0;
355 }
356
357 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
358 union perf_event *event __maybe_unused,
359 struct ordered_events *oe __maybe_unused)
360 {
361 dump_printf(": unhandled!\n");
362 return 0;
363 }
364
365 static int process_finished_round(struct perf_tool *tool,
366 union perf_event *event,
367 struct ordered_events *oe);
368
369 static int skipn(int fd, off_t n)
370 {
371 char buf[4096];
372 ssize_t ret;
373
374 while (n > 0) {
375 ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
376 if (ret <= 0)
377 return ret;
378 n -= ret;
379 }
380
381 return 0;
382 }
383
384 static s64 process_event_auxtrace_stub(struct perf_session *session __maybe_unused,
385 union perf_event *event)
386 {
387 dump_printf(": unhandled!\n");
388 if (perf_data__is_pipe(session->data))
389 skipn(perf_data__fd(session->data), event->auxtrace.size);
390 return event->auxtrace.size;
391 }
392
393 static int process_event_op2_stub(struct perf_session *session __maybe_unused,
394 union perf_event *event __maybe_unused)
395 {
396 dump_printf(": unhandled!\n");
397 return 0;
398 }
399
400
401 static
402 int process_event_thread_map_stub(struct perf_session *session __maybe_unused,
403 union perf_event *event __maybe_unused)
404 {
405 if (dump_trace)
406 perf_event__fprintf_thread_map(event, stdout);
407
408 dump_printf(": unhandled!\n");
409 return 0;
410 }
411
412 static
413 int process_event_cpu_map_stub(struct perf_session *session __maybe_unused,
414 union perf_event *event __maybe_unused)
415 {
416 if (dump_trace)
417 perf_event__fprintf_cpu_map(event, stdout);
418
419 dump_printf(": unhandled!\n");
420 return 0;
421 }
422
423 static
424 int process_event_stat_config_stub(struct perf_session *session __maybe_unused,
425 union perf_event *event __maybe_unused)
426 {
427 if (dump_trace)
428 perf_event__fprintf_stat_config(event, stdout);
429
430 dump_printf(": unhandled!\n");
431 return 0;
432 }
433
434 static int process_stat_stub(struct perf_session *perf_session __maybe_unused,
435 union perf_event *event)
436 {
437 if (dump_trace)
438 perf_event__fprintf_stat(event, stdout);
439
440 dump_printf(": unhandled!\n");
441 return 0;
442 }
443
444 static int process_stat_round_stub(struct perf_session *perf_session __maybe_unused,
445 union perf_event *event)
446 {
447 if (dump_trace)
448 perf_event__fprintf_stat_round(event, stdout);
449
450 dump_printf(": unhandled!\n");
451 return 0;
452 }
453
454 static int perf_session__process_compressed_event_stub(struct perf_session *session __maybe_unused,
455 union perf_event *event __maybe_unused,
456 u64 file_offset __maybe_unused)
457 {
458 dump_printf(": unhandled!\n");
459 return 0;
460 }
461
462 void perf_tool__fill_defaults(struct perf_tool *tool)
463 {
464 if (tool->sample == NULL)
465 tool->sample = process_event_sample_stub;
466 if (tool->mmap == NULL)
467 tool->mmap = process_event_stub;
468 if (tool->mmap2 == NULL)
469 tool->mmap2 = process_event_stub;
470 if (tool->comm == NULL)
471 tool->comm = process_event_stub;
472 if (tool->namespaces == NULL)
473 tool->namespaces = process_event_stub;
474 if (tool->cgroup == NULL)
475 tool->cgroup = process_event_stub;
476 if (tool->fork == NULL)
477 tool->fork = process_event_stub;
478 if (tool->exit == NULL)
479 tool->exit = process_event_stub;
480 if (tool->lost == NULL)
481 tool->lost = perf_event__process_lost;
482 if (tool->lost_samples == NULL)
483 tool->lost_samples = perf_event__process_lost_samples;
484 if (tool->aux == NULL)
485 tool->aux = perf_event__process_aux;
486 if (tool->itrace_start == NULL)
487 tool->itrace_start = perf_event__process_itrace_start;
488 if (tool->context_switch == NULL)
489 tool->context_switch = perf_event__process_switch;
490 if (tool->ksymbol == NULL)
491 tool->ksymbol = perf_event__process_ksymbol;
492 if (tool->bpf == NULL)
493 tool->bpf = perf_event__process_bpf;
494 if (tool->read == NULL)
495 tool->read = process_event_sample_stub;
496 if (tool->throttle == NULL)
497 tool->throttle = process_event_stub;
498 if (tool->unthrottle == NULL)
499 tool->unthrottle = process_event_stub;
500 if (tool->attr == NULL)
501 tool->attr = process_event_synth_attr_stub;
502 if (tool->event_update == NULL)
503 tool->event_update = process_event_synth_event_update_stub;
504 if (tool->tracing_data == NULL)
505 tool->tracing_data = process_event_synth_tracing_data_stub;
506 if (tool->build_id == NULL)
507 tool->build_id = process_event_op2_stub;
508 if (tool->finished_round == NULL) {
509 if (tool->ordered_events)
510 tool->finished_round = process_finished_round;
511 else
512 tool->finished_round = process_finished_round_stub;
513 }
514 if (tool->id_index == NULL)
515 tool->id_index = process_event_op2_stub;
516 if (tool->auxtrace_info == NULL)
517 tool->auxtrace_info = process_event_op2_stub;
518 if (tool->auxtrace == NULL)
519 tool->auxtrace = process_event_auxtrace_stub;
520 if (tool->auxtrace_error == NULL)
521 tool->auxtrace_error = process_event_op2_stub;
522 if (tool->thread_map == NULL)
523 tool->thread_map = process_event_thread_map_stub;
524 if (tool->cpu_map == NULL)
525 tool->cpu_map = process_event_cpu_map_stub;
526 if (tool->stat_config == NULL)
527 tool->stat_config = process_event_stat_config_stub;
528 if (tool->stat == NULL)
529 tool->stat = process_stat_stub;
530 if (tool->stat_round == NULL)
531 tool->stat_round = process_stat_round_stub;
532 if (tool->time_conv == NULL)
533 tool->time_conv = process_event_op2_stub;
534 if (tool->feature == NULL)
535 tool->feature = process_event_op2_stub;
536 if (tool->compressed == NULL)
537 tool->compressed = perf_session__process_compressed_event;
538 }
539
540 static void swap_sample_id_all(union perf_event *event, void *data)
541 {
542 void *end = (void *) event + event->header.size;
543 int size = end - data;
544
545 BUG_ON(size % sizeof(u64));
546 mem_bswap_64(data, size);
547 }
548
549 static void perf_event__all64_swap(union perf_event *event,
550 bool sample_id_all __maybe_unused)
551 {
552 struct perf_event_header *hdr = &event->header;
553 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
554 }
555
556 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
557 {
558 event->comm.pid = bswap_32(event->comm.pid);
559 event->comm.tid = bswap_32(event->comm.tid);
560
561 if (sample_id_all) {
562 void *data = &event->comm.comm;
563
564 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
565 swap_sample_id_all(event, data);
566 }
567 }
568
569 static void perf_event__mmap_swap(union perf_event *event,
570 bool sample_id_all)
571 {
572 event->mmap.pid = bswap_32(event->mmap.pid);
573 event->mmap.tid = bswap_32(event->mmap.tid);
574 event->mmap.start = bswap_64(event->mmap.start);
575 event->mmap.len = bswap_64(event->mmap.len);
576 event->mmap.pgoff = bswap_64(event->mmap.pgoff);
577
578 if (sample_id_all) {
579 void *data = &event->mmap.filename;
580
581 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
582 swap_sample_id_all(event, data);
583 }
584 }
585
586 static void perf_event__mmap2_swap(union perf_event *event,
587 bool sample_id_all)
588 {
589 event->mmap2.pid = bswap_32(event->mmap2.pid);
590 event->mmap2.tid = bswap_32(event->mmap2.tid);
591 event->mmap2.start = bswap_64(event->mmap2.start);
592 event->mmap2.len = bswap_64(event->mmap2.len);
593 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
594 event->mmap2.maj = bswap_32(event->mmap2.maj);
595 event->mmap2.min = bswap_32(event->mmap2.min);
596 event->mmap2.ino = bswap_64(event->mmap2.ino);
597
598 if (sample_id_all) {
599 void *data = &event->mmap2.filename;
600
601 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
602 swap_sample_id_all(event, data);
603 }
604 }
605 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
606 {
607 event->fork.pid = bswap_32(event->fork.pid);
608 event->fork.tid = bswap_32(event->fork.tid);
609 event->fork.ppid = bswap_32(event->fork.ppid);
610 event->fork.ptid = bswap_32(event->fork.ptid);
611 event->fork.time = bswap_64(event->fork.time);
612
613 if (sample_id_all)
614 swap_sample_id_all(event, &event->fork + 1);
615 }
616
617 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
618 {
619 event->read.pid = bswap_32(event->read.pid);
620 event->read.tid = bswap_32(event->read.tid);
621 event->read.value = bswap_64(event->read.value);
622 event->read.time_enabled = bswap_64(event->read.time_enabled);
623 event->read.time_running = bswap_64(event->read.time_running);
624 event->read.id = bswap_64(event->read.id);
625
626 if (sample_id_all)
627 swap_sample_id_all(event, &event->read + 1);
628 }
629
630 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
631 {
632 event->aux.aux_offset = bswap_64(event->aux.aux_offset);
633 event->aux.aux_size = bswap_64(event->aux.aux_size);
634 event->aux.flags = bswap_64(event->aux.flags);
635
636 if (sample_id_all)
637 swap_sample_id_all(event, &event->aux + 1);
638 }
639
640 static void perf_event__itrace_start_swap(union perf_event *event,
641 bool sample_id_all)
642 {
643 event->itrace_start.pid = bswap_32(event->itrace_start.pid);
644 event->itrace_start.tid = bswap_32(event->itrace_start.tid);
645
646 if (sample_id_all)
647 swap_sample_id_all(event, &event->itrace_start + 1);
648 }
649
650 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
651 {
652 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
653 event->context_switch.next_prev_pid =
654 bswap_32(event->context_switch.next_prev_pid);
655 event->context_switch.next_prev_tid =
656 bswap_32(event->context_switch.next_prev_tid);
657 }
658
659 if (sample_id_all)
660 swap_sample_id_all(event, &event->context_switch + 1);
661 }
662
663 static void perf_event__throttle_swap(union perf_event *event,
664 bool sample_id_all)
665 {
666 event->throttle.time = bswap_64(event->throttle.time);
667 event->throttle.id = bswap_64(event->throttle.id);
668 event->throttle.stream_id = bswap_64(event->throttle.stream_id);
669
670 if (sample_id_all)
671 swap_sample_id_all(event, &event->throttle + 1);
672 }
673
674 static void perf_event__namespaces_swap(union perf_event *event,
675 bool sample_id_all)
676 {
677 u64 i;
678
679 event->namespaces.pid = bswap_32(event->namespaces.pid);
680 event->namespaces.tid = bswap_32(event->namespaces.tid);
681 event->namespaces.nr_namespaces = bswap_64(event->namespaces.nr_namespaces);
682
683 for (i = 0; i < event->namespaces.nr_namespaces; i++) {
684 struct perf_ns_link_info *ns = &event->namespaces.link_info[i];
685
686 ns->dev = bswap_64(ns->dev);
687 ns->ino = bswap_64(ns->ino);
688 }
689
690 if (sample_id_all)
691 swap_sample_id_all(event, &event->namespaces.link_info[i]);
692 }
693
694 static u8 revbyte(u8 b)
695 {
696 int rev = (b >> 4) | ((b & 0xf) << 4);
697 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
698 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
699 return (u8) rev;
700 }
701
702 /*
703 * XXX this is hack in attempt to carry flags bitfield
704 * through endian village. ABI says:
705 *
706 * Bit-fields are allocated from right to left (least to most significant)
707 * on little-endian implementations and from left to right (most to least
708 * significant) on big-endian implementations.
709 *
710 * The above seems to be byte specific, so we need to reverse each
711 * byte of the bitfield. 'Internet' also says this might be implementation
712 * specific and we probably need proper fix and carry perf_event_attr
713 * bitfield flags in separate data file FEAT_ section. Thought this seems
714 * to work for now.
715 */
716 static void swap_bitfield(u8 *p, unsigned len)
717 {
718 unsigned i;
719
720 for (i = 0; i < len; i++) {
721 *p = revbyte(*p);
722 p++;
723 }
724 }
725
726 /* exported for swapping attributes in file header */
727 void perf_event__attr_swap(struct perf_event_attr *attr)
728 {
729 attr->type = bswap_32(attr->type);
730 attr->size = bswap_32(attr->size);
731
732 #define bswap_safe(f, n) \
733 (attr->size > (offsetof(struct perf_event_attr, f) + \
734 sizeof(attr->f) * (n)))
735 #define bswap_field(f, sz) \
736 do { \
737 if (bswap_safe(f, 0)) \
738 attr->f = bswap_##sz(attr->f); \
739 } while(0)
740 #define bswap_field_16(f) bswap_field(f, 16)
741 #define bswap_field_32(f) bswap_field(f, 32)
742 #define bswap_field_64(f) bswap_field(f, 64)
743
744 bswap_field_64(config);
745 bswap_field_64(sample_period);
746 bswap_field_64(sample_type);
747 bswap_field_64(read_format);
748 bswap_field_32(wakeup_events);
749 bswap_field_32(bp_type);
750 bswap_field_64(bp_addr);
751 bswap_field_64(bp_len);
752 bswap_field_64(branch_sample_type);
753 bswap_field_64(sample_regs_user);
754 bswap_field_32(sample_stack_user);
755 bswap_field_32(aux_watermark);
756 bswap_field_16(sample_max_stack);
757 bswap_field_32(aux_sample_size);
758
759 /*
760 * After read_format are bitfields. Check read_format because
761 * we are unable to use offsetof on bitfield.
762 */
763 if (bswap_safe(read_format, 1))
764 swap_bitfield((u8 *) (&attr->read_format + 1),
765 sizeof(u64));
766 #undef bswap_field_64
767 #undef bswap_field_32
768 #undef bswap_field
769 #undef bswap_safe
770 }
771
772 static void perf_event__hdr_attr_swap(union perf_event *event,
773 bool sample_id_all __maybe_unused)
774 {
775 size_t size;
776
777 perf_event__attr_swap(&event->attr.attr);
778
779 size = event->header.size;
780 size -= (void *)&event->attr.id - (void *)event;
781 mem_bswap_64(event->attr.id, size);
782 }
783
784 static void perf_event__event_update_swap(union perf_event *event,
785 bool sample_id_all __maybe_unused)
786 {
787 event->event_update.type = bswap_64(event->event_update.type);
788 event->event_update.id = bswap_64(event->event_update.id);
789 }
790
791 static void perf_event__event_type_swap(union perf_event *event,
792 bool sample_id_all __maybe_unused)
793 {
794 event->event_type.event_type.event_id =
795 bswap_64(event->event_type.event_type.event_id);
796 }
797
798 static void perf_event__tracing_data_swap(union perf_event *event,
799 bool sample_id_all __maybe_unused)
800 {
801 event->tracing_data.size = bswap_32(event->tracing_data.size);
802 }
803
804 static void perf_event__auxtrace_info_swap(union perf_event *event,
805 bool sample_id_all __maybe_unused)
806 {
807 size_t size;
808
809 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
810
811 size = event->header.size;
812 size -= (void *)&event->auxtrace_info.priv - (void *)event;
813 mem_bswap_64(event->auxtrace_info.priv, size);
814 }
815
816 static void perf_event__auxtrace_swap(union perf_event *event,
817 bool sample_id_all __maybe_unused)
818 {
819 event->auxtrace.size = bswap_64(event->auxtrace.size);
820 event->auxtrace.offset = bswap_64(event->auxtrace.offset);
821 event->auxtrace.reference = bswap_64(event->auxtrace.reference);
822 event->auxtrace.idx = bswap_32(event->auxtrace.idx);
823 event->auxtrace.tid = bswap_32(event->auxtrace.tid);
824 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu);
825 }
826
827 static void perf_event__auxtrace_error_swap(union perf_event *event,
828 bool sample_id_all __maybe_unused)
829 {
830 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
831 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
832 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu);
833 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid);
834 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid);
835 event->auxtrace_error.fmt = bswap_32(event->auxtrace_error.fmt);
836 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip);
837 if (event->auxtrace_error.fmt)
838 event->auxtrace_error.time = bswap_64(event->auxtrace_error.time);
839 }
840
841 static void perf_event__thread_map_swap(union perf_event *event,
842 bool sample_id_all __maybe_unused)
843 {
844 unsigned i;
845
846 event->thread_map.nr = bswap_64(event->thread_map.nr);
847
848 for (i = 0; i < event->thread_map.nr; i++)
849 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
850 }
851
852 static void perf_event__cpu_map_swap(union perf_event *event,
853 bool sample_id_all __maybe_unused)
854 {
855 struct perf_record_cpu_map_data *data = &event->cpu_map.data;
856 struct cpu_map_entries *cpus;
857 struct perf_record_record_cpu_map *mask;
858 unsigned i;
859
860 data->type = bswap_64(data->type);
861
862 switch (data->type) {
863 case PERF_CPU_MAP__CPUS:
864 cpus = (struct cpu_map_entries *)data->data;
865
866 cpus->nr = bswap_16(cpus->nr);
867
868 for (i = 0; i < cpus->nr; i++)
869 cpus->cpu[i] = bswap_16(cpus->cpu[i]);
870 break;
871 case PERF_CPU_MAP__MASK:
872 mask = (struct perf_record_record_cpu_map *)data->data;
873
874 mask->nr = bswap_16(mask->nr);
875 mask->long_size = bswap_16(mask->long_size);
876
877 switch (mask->long_size) {
878 case 4: mem_bswap_32(&mask->mask, mask->nr); break;
879 case 8: mem_bswap_64(&mask->mask, mask->nr); break;
880 default:
881 pr_err("cpu_map swap: unsupported long size\n");
882 }
883 default:
884 break;
885 }
886 }
887
888 static void perf_event__stat_config_swap(union perf_event *event,
889 bool sample_id_all __maybe_unused)
890 {
891 u64 size;
892
893 size = event->stat_config.nr * sizeof(event->stat_config.data[0]);
894 size += 1; /* nr item itself */
895 mem_bswap_64(&event->stat_config.nr, size);
896 }
897
898 static void perf_event__stat_swap(union perf_event *event,
899 bool sample_id_all __maybe_unused)
900 {
901 event->stat.id = bswap_64(event->stat.id);
902 event->stat.thread = bswap_32(event->stat.thread);
903 event->stat.cpu = bswap_32(event->stat.cpu);
904 event->stat.val = bswap_64(event->stat.val);
905 event->stat.ena = bswap_64(event->stat.ena);
906 event->stat.run = bswap_64(event->stat.run);
907 }
908
909 static void perf_event__stat_round_swap(union perf_event *event,
910 bool sample_id_all __maybe_unused)
911 {
912 event->stat_round.type = bswap_64(event->stat_round.type);
913 event->stat_round.time = bswap_64(event->stat_round.time);
914 }
915
916 typedef void (*perf_event__swap_op)(union perf_event *event,
917 bool sample_id_all);
918
919 static perf_event__swap_op perf_event__swap_ops[] = {
920 [PERF_RECORD_MMAP] = perf_event__mmap_swap,
921 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap,
922 [PERF_RECORD_COMM] = perf_event__comm_swap,
923 [PERF_RECORD_FORK] = perf_event__task_swap,
924 [PERF_RECORD_EXIT] = perf_event__task_swap,
925 [PERF_RECORD_LOST] = perf_event__all64_swap,
926 [PERF_RECORD_READ] = perf_event__read_swap,
927 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap,
928 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap,
929 [PERF_RECORD_SAMPLE] = perf_event__all64_swap,
930 [PERF_RECORD_AUX] = perf_event__aux_swap,
931 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap,
932 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap,
933 [PERF_RECORD_SWITCH] = perf_event__switch_swap,
934 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap,
935 [PERF_RECORD_NAMESPACES] = perf_event__namespaces_swap,
936 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
937 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
938 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
939 [PERF_RECORD_HEADER_BUILD_ID] = NULL,
940 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap,
941 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap,
942 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap,
943 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap,
944 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap,
945 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap,
946 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap,
947 [PERF_RECORD_STAT] = perf_event__stat_swap,
948 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap,
949 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap,
950 [PERF_RECORD_TIME_CONV] = perf_event__all64_swap,
951 [PERF_RECORD_HEADER_MAX] = NULL,
952 };
953
954 /*
955 * When perf record finishes a pass on every buffers, it records this pseudo
956 * event.
957 * We record the max timestamp t found in the pass n.
958 * Assuming these timestamps are monotonic across cpus, we know that if
959 * a buffer still has events with timestamps below t, they will be all
960 * available and then read in the pass n + 1.
961 * Hence when we start to read the pass n + 2, we can safely flush every
962 * events with timestamps below t.
963 *
964 * ============ PASS n =================
965 * CPU 0 | CPU 1
966 * |
967 * cnt1 timestamps | cnt2 timestamps
968 * 1 | 2
969 * 2 | 3
970 * - | 4 <--- max recorded
971 *
972 * ============ PASS n + 1 ==============
973 * CPU 0 | CPU 1
974 * |
975 * cnt1 timestamps | cnt2 timestamps
976 * 3 | 5
977 * 4 | 6
978 * 5 | 7 <---- max recorded
979 *
980 * Flush every events below timestamp 4
981 *
982 * ============ PASS n + 2 ==============
983 * CPU 0 | CPU 1
984 * |
985 * cnt1 timestamps | cnt2 timestamps
986 * 6 | 8
987 * 7 | 9
988 * - | 10
989 *
990 * Flush every events below timestamp 7
991 * etc...
992 */
993 static int process_finished_round(struct perf_tool *tool __maybe_unused,
994 union perf_event *event __maybe_unused,
995 struct ordered_events *oe)
996 {
997 if (dump_trace)
998 fprintf(stdout, "\n");
999 return ordered_events__flush(oe, OE_FLUSH__ROUND);
1000 }
1001
1002 int perf_session__queue_event(struct perf_session *s, union perf_event *event,
1003 u64 timestamp, u64 file_offset)
1004 {
1005 return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset);
1006 }
1007
1008 static void callchain__lbr_callstack_printf(struct perf_sample *sample)
1009 {
1010 struct ip_callchain *callchain = sample->callchain;
1011 struct branch_stack *lbr_stack = sample->branch_stack;
1012 struct branch_entry *entries = perf_sample__branch_entries(sample);
1013 u64 kernel_callchain_nr = callchain->nr;
1014 unsigned int i;
1015
1016 for (i = 0; i < kernel_callchain_nr; i++) {
1017 if (callchain->ips[i] == PERF_CONTEXT_USER)
1018 break;
1019 }
1020
1021 if ((i != kernel_callchain_nr) && lbr_stack->nr) {
1022 u64 total_nr;
1023 /*
1024 * LBR callstack can only get user call chain,
1025 * i is kernel call chain number,
1026 * 1 is PERF_CONTEXT_USER.
1027 *
1028 * The user call chain is stored in LBR registers.
1029 * LBR are pair registers. The caller is stored
1030 * in "from" register, while the callee is stored
1031 * in "to" register.
1032 * For example, there is a call stack
1033 * "A"->"B"->"C"->"D".
1034 * The LBR registers will recorde like
1035 * "C"->"D", "B"->"C", "A"->"B".
1036 * So only the first "to" register and all "from"
1037 * registers are needed to construct the whole stack.
1038 */
1039 total_nr = i + 1 + lbr_stack->nr + 1;
1040 kernel_callchain_nr = i + 1;
1041
1042 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
1043
1044 for (i = 0; i < kernel_callchain_nr; i++)
1045 printf("..... %2d: %016" PRIx64 "\n",
1046 i, callchain->ips[i]);
1047
1048 printf("..... %2d: %016" PRIx64 "\n",
1049 (int)(kernel_callchain_nr), entries[0].to);
1050 for (i = 0; i < lbr_stack->nr; i++)
1051 printf("..... %2d: %016" PRIx64 "\n",
1052 (int)(i + kernel_callchain_nr + 1), entries[i].from);
1053 }
1054 }
1055
1056 static void callchain__printf(struct evsel *evsel,
1057 struct perf_sample *sample)
1058 {
1059 unsigned int i;
1060 struct ip_callchain *callchain = sample->callchain;
1061
1062 if (perf_evsel__has_branch_callstack(evsel))
1063 callchain__lbr_callstack_printf(sample);
1064
1065 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
1066
1067 for (i = 0; i < callchain->nr; i++)
1068 printf("..... %2d: %016" PRIx64 "\n",
1069 i, callchain->ips[i]);
1070 }
1071
1072 static void branch_stack__printf(struct perf_sample *sample, bool callstack)
1073 {
1074 struct branch_entry *entries = perf_sample__branch_entries(sample);
1075 uint64_t i;
1076
1077 printf("%s: nr:%" PRIu64 "\n",
1078 !callstack ? "... branch stack" : "... branch callstack",
1079 sample->branch_stack->nr);
1080
1081 for (i = 0; i < sample->branch_stack->nr; i++) {
1082 struct branch_entry *e = &entries[i];
1083
1084 if (!callstack) {
1085 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n",
1086 i, e->from, e->to,
1087 (unsigned short)e->flags.cycles,
1088 e->flags.mispred ? "M" : " ",
1089 e->flags.predicted ? "P" : " ",
1090 e->flags.abort ? "A" : " ",
1091 e->flags.in_tx ? "T" : " ",
1092 (unsigned)e->flags.reserved);
1093 } else {
1094 printf("..... %2"PRIu64": %016" PRIx64 "\n",
1095 i, i > 0 ? e->from : e->to);
1096 }
1097 }
1098 }
1099
1100 static void regs_dump__printf(u64 mask, u64 *regs)
1101 {
1102 unsigned rid, i = 0;
1103
1104 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
1105 u64 val = regs[i++];
1106
1107 printf(".... %-5s 0x%" PRIx64 "\n",
1108 perf_reg_name(rid), val);
1109 }
1110 }
1111
1112 static const char *regs_abi[] = {
1113 [PERF_SAMPLE_REGS_ABI_NONE] = "none",
1114 [PERF_SAMPLE_REGS_ABI_32] = "32-bit",
1115 [PERF_SAMPLE_REGS_ABI_64] = "64-bit",
1116 };
1117
1118 static inline const char *regs_dump_abi(struct regs_dump *d)
1119 {
1120 if (d->abi > PERF_SAMPLE_REGS_ABI_64)
1121 return "unknown";
1122
1123 return regs_abi[d->abi];
1124 }
1125
1126 static void regs__printf(const char *type, struct regs_dump *regs)
1127 {
1128 u64 mask = regs->mask;
1129
1130 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
1131 type,
1132 mask,
1133 regs_dump_abi(regs));
1134
1135 regs_dump__printf(mask, regs->regs);
1136 }
1137
1138 static void regs_user__printf(struct perf_sample *sample)
1139 {
1140 struct regs_dump *user_regs = &sample->user_regs;
1141
1142 if (user_regs->regs)
1143 regs__printf("user", user_regs);
1144 }
1145
1146 static void regs_intr__printf(struct perf_sample *sample)
1147 {
1148 struct regs_dump *intr_regs = &sample->intr_regs;
1149
1150 if (intr_regs->regs)
1151 regs__printf("intr", intr_regs);
1152 }
1153
1154 static void stack_user__printf(struct stack_dump *dump)
1155 {
1156 printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
1157 dump->size, dump->offset);
1158 }
1159
1160 static void perf_evlist__print_tstamp(struct evlist *evlist,
1161 union perf_event *event,
1162 struct perf_sample *sample)
1163 {
1164 u64 sample_type = __perf_evlist__combined_sample_type(evlist);
1165
1166 if (event->header.type != PERF_RECORD_SAMPLE &&
1167 !perf_evlist__sample_id_all(evlist)) {
1168 fputs("-1 -1 ", stdout);
1169 return;
1170 }
1171
1172 if ((sample_type & PERF_SAMPLE_CPU))
1173 printf("%u ", sample->cpu);
1174
1175 if (sample_type & PERF_SAMPLE_TIME)
1176 printf("%" PRIu64 " ", sample->time);
1177 }
1178
1179 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
1180 {
1181 printf("... sample_read:\n");
1182
1183 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1184 printf("...... time enabled %016" PRIx64 "\n",
1185 sample->read.time_enabled);
1186
1187 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1188 printf("...... time running %016" PRIx64 "\n",
1189 sample->read.time_running);
1190
1191 if (read_format & PERF_FORMAT_GROUP) {
1192 u64 i;
1193
1194 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
1195
1196 for (i = 0; i < sample->read.group.nr; i++) {
1197 struct sample_read_value *value;
1198
1199 value = &sample->read.group.values[i];
1200 printf("..... id %016" PRIx64
1201 ", value %016" PRIx64 "\n",
1202 value->id, value->value);
1203 }
1204 } else
1205 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
1206 sample->read.one.id, sample->read.one.value);
1207 }
1208
1209 static void dump_event(struct evlist *evlist, union perf_event *event,
1210 u64 file_offset, struct perf_sample *sample)
1211 {
1212 if (!dump_trace)
1213 return;
1214
1215 printf("\n%#" PRIx64 " [%#x]: event: %d\n",
1216 file_offset, event->header.size, event->header.type);
1217
1218 trace_event(event);
1219 if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw)
1220 evlist->trace_event_sample_raw(evlist, event, sample);
1221
1222 if (sample)
1223 perf_evlist__print_tstamp(evlist, event, sample);
1224
1225 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
1226 event->header.size, perf_event__name(event->header.type));
1227 }
1228
1229 static void dump_sample(struct evsel *evsel, union perf_event *event,
1230 struct perf_sample *sample)
1231 {
1232 u64 sample_type;
1233
1234 if (!dump_trace)
1235 return;
1236
1237 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
1238 event->header.misc, sample->pid, sample->tid, sample->ip,
1239 sample->period, sample->addr);
1240
1241 sample_type = evsel->core.attr.sample_type;
1242
1243 if (evsel__has_callchain(evsel))
1244 callchain__printf(evsel, sample);
1245
1246 if (sample_type & PERF_SAMPLE_BRANCH_STACK)
1247 branch_stack__printf(sample, perf_evsel__has_branch_callstack(evsel));
1248
1249 if (sample_type & PERF_SAMPLE_REGS_USER)
1250 regs_user__printf(sample);
1251
1252 if (sample_type & PERF_SAMPLE_REGS_INTR)
1253 regs_intr__printf(sample);
1254
1255 if (sample_type & PERF_SAMPLE_STACK_USER)
1256 stack_user__printf(&sample->user_stack);
1257
1258 if (sample_type & PERF_SAMPLE_WEIGHT)
1259 printf("... weight: %" PRIu64 "\n", sample->weight);
1260
1261 if (sample_type & PERF_SAMPLE_DATA_SRC)
1262 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
1263
1264 if (sample_type & PERF_SAMPLE_PHYS_ADDR)
1265 printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr);
1266
1267 if (sample_type & PERF_SAMPLE_TRANSACTION)
1268 printf("... transaction: %" PRIx64 "\n", sample->transaction);
1269
1270 if (sample_type & PERF_SAMPLE_READ)
1271 sample_read__printf(sample, evsel->core.attr.read_format);
1272 }
1273
1274 static void dump_read(struct evsel *evsel, union perf_event *event)
1275 {
1276 struct perf_record_read *read_event = &event->read;
1277 u64 read_format;
1278
1279 if (!dump_trace)
1280 return;
1281
1282 printf(": %d %d %s %" PRI_lu64 "\n", event->read.pid, event->read.tid,
1283 perf_evsel__name(evsel),
1284 event->read.value);
1285
1286 if (!evsel)
1287 return;
1288
1289 read_format = evsel->core.attr.read_format;
1290
1291 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1292 printf("... time enabled : %" PRI_lu64 "\n", read_event->time_enabled);
1293
1294 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1295 printf("... time running : %" PRI_lu64 "\n", read_event->time_running);
1296
1297 if (read_format & PERF_FORMAT_ID)
1298 printf("... id : %" PRI_lu64 "\n", read_event->id);
1299 }
1300
1301 static struct machine *machines__find_for_cpumode(struct machines *machines,
1302 union perf_event *event,
1303 struct perf_sample *sample)
1304 {
1305 struct machine *machine;
1306
1307 if (perf_guest &&
1308 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1309 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1310 u32 pid;
1311
1312 if (event->header.type == PERF_RECORD_MMAP
1313 || event->header.type == PERF_RECORD_MMAP2)
1314 pid = event->mmap.pid;
1315 else
1316 pid = sample->pid;
1317
1318 machine = machines__find(machines, pid);
1319 if (!machine)
1320 machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID);
1321 return machine;
1322 }
1323
1324 return &machines->host;
1325 }
1326
1327 static int deliver_sample_value(struct evlist *evlist,
1328 struct perf_tool *tool,
1329 union perf_event *event,
1330 struct perf_sample *sample,
1331 struct sample_read_value *v,
1332 struct machine *machine)
1333 {
1334 struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
1335 struct evsel *evsel;
1336
1337 if (sid) {
1338 sample->id = v->id;
1339 sample->period = v->value - sid->period;
1340 sid->period = v->value;
1341 }
1342
1343 if (!sid || sid->evsel == NULL) {
1344 ++evlist->stats.nr_unknown_id;
1345 return 0;
1346 }
1347
1348 /*
1349 * There's no reason to deliver sample
1350 * for zero period, bail out.
1351 */
1352 if (!sample->period)
1353 return 0;
1354
1355 evsel = container_of(sid->evsel, struct evsel, core);
1356 return tool->sample(tool, event, sample, evsel, machine);
1357 }
1358
1359 static int deliver_sample_group(struct evlist *evlist,
1360 struct perf_tool *tool,
1361 union perf_event *event,
1362 struct perf_sample *sample,
1363 struct machine *machine)
1364 {
1365 int ret = -EINVAL;
1366 u64 i;
1367
1368 for (i = 0; i < sample->read.group.nr; i++) {
1369 ret = deliver_sample_value(evlist, tool, event, sample,
1370 &sample->read.group.values[i],
1371 machine);
1372 if (ret)
1373 break;
1374 }
1375
1376 return ret;
1377 }
1378
1379 static int
1380 perf_evlist__deliver_sample(struct evlist *evlist,
1381 struct perf_tool *tool,
1382 union perf_event *event,
1383 struct perf_sample *sample,
1384 struct evsel *evsel,
1385 struct machine *machine)
1386 {
1387 /* We know evsel != NULL. */
1388 u64 sample_type = evsel->core.attr.sample_type;
1389 u64 read_format = evsel->core.attr.read_format;
1390
1391 /* Standard sample delivery. */
1392 if (!(sample_type & PERF_SAMPLE_READ))
1393 return tool->sample(tool, event, sample, evsel, machine);
1394
1395 /* For PERF_SAMPLE_READ we have either single or group mode. */
1396 if (read_format & PERF_FORMAT_GROUP)
1397 return deliver_sample_group(evlist, tool, event, sample,
1398 machine);
1399 else
1400 return deliver_sample_value(evlist, tool, event, sample,
1401 &sample->read.one, machine);
1402 }
1403
1404 static int machines__deliver_event(struct machines *machines,
1405 struct evlist *evlist,
1406 union perf_event *event,
1407 struct perf_sample *sample,
1408 struct perf_tool *tool, u64 file_offset)
1409 {
1410 struct evsel *evsel;
1411 struct machine *machine;
1412
1413 dump_event(evlist, event, file_offset, sample);
1414
1415 evsel = perf_evlist__id2evsel(evlist, sample->id);
1416
1417 machine = machines__find_for_cpumode(machines, event, sample);
1418
1419 switch (event->header.type) {
1420 case PERF_RECORD_SAMPLE:
1421 if (evsel == NULL) {
1422 ++evlist->stats.nr_unknown_id;
1423 return 0;
1424 }
1425 dump_sample(evsel, event, sample);
1426 if (machine == NULL) {
1427 ++evlist->stats.nr_unprocessable_samples;
1428 return 0;
1429 }
1430 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1431 case PERF_RECORD_MMAP:
1432 return tool->mmap(tool, event, sample, machine);
1433 case PERF_RECORD_MMAP2:
1434 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1435 ++evlist->stats.nr_proc_map_timeout;
1436 return tool->mmap2(tool, event, sample, machine);
1437 case PERF_RECORD_COMM:
1438 return tool->comm(tool, event, sample, machine);
1439 case PERF_RECORD_NAMESPACES:
1440 return tool->namespaces(tool, event, sample, machine);
1441 case PERF_RECORD_CGROUP:
1442 return tool->cgroup(tool, event, sample, machine);
1443 case PERF_RECORD_FORK:
1444 return tool->fork(tool, event, sample, machine);
1445 case PERF_RECORD_EXIT:
1446 return tool->exit(tool, event, sample, machine);
1447 case PERF_RECORD_LOST:
1448 if (tool->lost == perf_event__process_lost)
1449 evlist->stats.total_lost += event->lost.lost;
1450 return tool->lost(tool, event, sample, machine);
1451 case PERF_RECORD_LOST_SAMPLES:
1452 if (tool->lost_samples == perf_event__process_lost_samples)
1453 evlist->stats.total_lost_samples += event->lost_samples.lost;
1454 return tool->lost_samples(tool, event, sample, machine);
1455 case PERF_RECORD_READ:
1456 dump_read(evsel, event);
1457 return tool->read(tool, event, sample, evsel, machine);
1458 case PERF_RECORD_THROTTLE:
1459 return tool->throttle(tool, event, sample, machine);
1460 case PERF_RECORD_UNTHROTTLE:
1461 return tool->unthrottle(tool, event, sample, machine);
1462 case PERF_RECORD_AUX:
1463 if (tool->aux == perf_event__process_aux) {
1464 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED)
1465 evlist->stats.total_aux_lost += 1;
1466 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL)
1467 evlist->stats.total_aux_partial += 1;
1468 }
1469 return tool->aux(tool, event, sample, machine);
1470 case PERF_RECORD_ITRACE_START:
1471 return tool->itrace_start(tool, event, sample, machine);
1472 case PERF_RECORD_SWITCH:
1473 case PERF_RECORD_SWITCH_CPU_WIDE:
1474 return tool->context_switch(tool, event, sample, machine);
1475 case PERF_RECORD_KSYMBOL:
1476 return tool->ksymbol(tool, event, sample, machine);
1477 case PERF_RECORD_BPF_EVENT:
1478 return tool->bpf(tool, event, sample, machine);
1479 default:
1480 ++evlist->stats.nr_unknown_events;
1481 return -1;
1482 }
1483 }
1484
1485 static int perf_session__deliver_event(struct perf_session *session,
1486 union perf_event *event,
1487 struct perf_tool *tool,
1488 u64 file_offset)
1489 {
1490 struct perf_sample sample;
1491 int ret;
1492
1493 ret = perf_evlist__parse_sample(session->evlist, event, &sample);
1494 if (ret) {
1495 pr_err("Can't parse sample, err = %d\n", ret);
1496 return ret;
1497 }
1498
1499 ret = auxtrace__process_event(session, event, &sample, tool);
1500 if (ret < 0)
1501 return ret;
1502 if (ret > 0)
1503 return 0;
1504
1505 ret = machines__deliver_event(&session->machines, session->evlist,
1506 event, &sample, tool, file_offset);
1507
1508 if (dump_trace && sample.aux_sample.size)
1509 auxtrace__dump_auxtrace_sample(session, &sample);
1510
1511 return ret;
1512 }
1513
1514 static s64 perf_session__process_user_event(struct perf_session *session,
1515 union perf_event *event,
1516 u64 file_offset)
1517 {
1518 struct ordered_events *oe = &session->ordered_events;
1519 struct perf_tool *tool = session->tool;
1520 struct perf_sample sample = { .time = 0, };
1521 int fd = perf_data__fd(session->data);
1522 int err;
1523
1524 if (event->header.type != PERF_RECORD_COMPRESSED ||
1525 tool->compressed == perf_session__process_compressed_event_stub)
1526 dump_event(session->evlist, event, file_offset, &sample);
1527
1528 /* These events are processed right away */
1529 switch (event->header.type) {
1530 case PERF_RECORD_HEADER_ATTR:
1531 err = tool->attr(tool, event, &session->evlist);
1532 if (err == 0) {
1533 perf_session__set_id_hdr_size(session);
1534 perf_session__set_comm_exec(session);
1535 }
1536 return err;
1537 case PERF_RECORD_EVENT_UPDATE:
1538 return tool->event_update(tool, event, &session->evlist);
1539 case PERF_RECORD_HEADER_EVENT_TYPE:
1540 /*
1541 * Depreceated, but we need to handle it for sake
1542 * of old data files create in pipe mode.
1543 */
1544 return 0;
1545 case PERF_RECORD_HEADER_TRACING_DATA:
1546 /* setup for reading amidst mmap */
1547 lseek(fd, file_offset, SEEK_SET);
1548 return tool->tracing_data(session, event);
1549 case PERF_RECORD_HEADER_BUILD_ID:
1550 return tool->build_id(session, event);
1551 case PERF_RECORD_FINISHED_ROUND:
1552 return tool->finished_round(tool, event, oe);
1553 case PERF_RECORD_ID_INDEX:
1554 return tool->id_index(session, event);
1555 case PERF_RECORD_AUXTRACE_INFO:
1556 return tool->auxtrace_info(session, event);
1557 case PERF_RECORD_AUXTRACE:
1558 /* setup for reading amidst mmap */
1559 lseek(fd, file_offset + event->header.size, SEEK_SET);
1560 return tool->auxtrace(session, event);
1561 case PERF_RECORD_AUXTRACE_ERROR:
1562 perf_session__auxtrace_error_inc(session, event);
1563 return tool->auxtrace_error(session, event);
1564 case PERF_RECORD_THREAD_MAP:
1565 return tool->thread_map(session, event);
1566 case PERF_RECORD_CPU_MAP:
1567 return tool->cpu_map(session, event);
1568 case PERF_RECORD_STAT_CONFIG:
1569 return tool->stat_config(session, event);
1570 case PERF_RECORD_STAT:
1571 return tool->stat(session, event);
1572 case PERF_RECORD_STAT_ROUND:
1573 return tool->stat_round(session, event);
1574 case PERF_RECORD_TIME_CONV:
1575 session->time_conv = event->time_conv;
1576 return tool->time_conv(session, event);
1577 case PERF_RECORD_HEADER_FEATURE:
1578 return tool->feature(session, event);
1579 case PERF_RECORD_COMPRESSED:
1580 err = tool->compressed(session, event, file_offset);
1581 if (err)
1582 dump_event(session->evlist, event, file_offset, &sample);
1583 return err;
1584 default:
1585 return -EINVAL;
1586 }
1587 }
1588
1589 int perf_session__deliver_synth_event(struct perf_session *session,
1590 union perf_event *event,
1591 struct perf_sample *sample)
1592 {
1593 struct evlist *evlist = session->evlist;
1594 struct perf_tool *tool = session->tool;
1595
1596 events_stats__inc(&evlist->stats, event->header.type);
1597
1598 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1599 return perf_session__process_user_event(session, event, 0);
1600
1601 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0);
1602 }
1603
1604 static void event_swap(union perf_event *event, bool sample_id_all)
1605 {
1606 perf_event__swap_op swap;
1607
1608 swap = perf_event__swap_ops[event->header.type];
1609 if (swap)
1610 swap(event, sample_id_all);
1611 }
1612
1613 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1614 void *buf, size_t buf_sz,
1615 union perf_event **event_ptr,
1616 struct perf_sample *sample)
1617 {
1618 union perf_event *event;
1619 size_t hdr_sz, rest;
1620 int fd;
1621
1622 if (session->one_mmap && !session->header.needs_swap) {
1623 event = file_offset - session->one_mmap_offset +
1624 session->one_mmap_addr;
1625 goto out_parse_sample;
1626 }
1627
1628 if (perf_data__is_pipe(session->data))
1629 return -1;
1630
1631 fd = perf_data__fd(session->data);
1632 hdr_sz = sizeof(struct perf_event_header);
1633
1634 if (buf_sz < hdr_sz)
1635 return -1;
1636
1637 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1638 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1639 return -1;
1640
1641 event = (union perf_event *)buf;
1642
1643 if (session->header.needs_swap)
1644 perf_event_header__bswap(&event->header);
1645
1646 if (event->header.size < hdr_sz || event->header.size > buf_sz)
1647 return -1;
1648
1649 rest = event->header.size - hdr_sz;
1650
1651 if (readn(fd, buf, rest) != (ssize_t)rest)
1652 return -1;
1653
1654 if (session->header.needs_swap)
1655 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1656
1657 out_parse_sample:
1658
1659 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1660 perf_evlist__parse_sample(session->evlist, event, sample))
1661 return -1;
1662
1663 *event_ptr = event;
1664
1665 return 0;
1666 }
1667
1668 int perf_session__peek_events(struct perf_session *session, u64 offset,
1669 u64 size, peek_events_cb_t cb, void *data)
1670 {
1671 u64 max_offset = offset + size;
1672 char buf[PERF_SAMPLE_MAX_SIZE];
1673 union perf_event *event;
1674 int err;
1675
1676 do {
1677 err = perf_session__peek_event(session, offset, buf,
1678 PERF_SAMPLE_MAX_SIZE, &event,
1679 NULL);
1680 if (err)
1681 return err;
1682
1683 err = cb(session, event, offset, data);
1684 if (err)
1685 return err;
1686
1687 offset += event->header.size;
1688 if (event->header.type == PERF_RECORD_AUXTRACE)
1689 offset += event->auxtrace.size;
1690
1691 } while (offset < max_offset);
1692
1693 return err;
1694 }
1695
1696 static s64 perf_session__process_event(struct perf_session *session,
1697 union perf_event *event, u64 file_offset)
1698 {
1699 struct evlist *evlist = session->evlist;
1700 struct perf_tool *tool = session->tool;
1701 int ret;
1702
1703 if (session->header.needs_swap)
1704 event_swap(event, perf_evlist__sample_id_all(evlist));
1705
1706 if (event->header.type >= PERF_RECORD_HEADER_MAX)
1707 return -EINVAL;
1708
1709 events_stats__inc(&evlist->stats, event->header.type);
1710
1711 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1712 return perf_session__process_user_event(session, event, file_offset);
1713
1714 if (tool->ordered_events) {
1715 u64 timestamp = -1ULL;
1716
1717 ret = perf_evlist__parse_sample_timestamp(evlist, event, &timestamp);
1718 if (ret && ret != -1)
1719 return ret;
1720
1721 ret = perf_session__queue_event(session, event, timestamp, file_offset);
1722 if (ret != -ETIME)
1723 return ret;
1724 }
1725
1726 return perf_session__deliver_event(session, event, tool, file_offset);
1727 }
1728
1729 void perf_event_header__bswap(struct perf_event_header *hdr)
1730 {
1731 hdr->type = bswap_32(hdr->type);
1732 hdr->misc = bswap_16(hdr->misc);
1733 hdr->size = bswap_16(hdr->size);
1734 }
1735
1736 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1737 {
1738 return machine__findnew_thread(&session->machines.host, -1, pid);
1739 }
1740
1741 /*
1742 * Threads are identified by pid and tid, and the idle task has pid == tid == 0.
1743 * So here a single thread is created for that, but actually there is a separate
1744 * idle task per cpu, so there should be one 'struct thread' per cpu, but there
1745 * is only 1. That causes problems for some tools, requiring workarounds. For
1746 * example get_idle_thread() in builtin-sched.c, or thread_stack__per_cpu().
1747 */
1748 int perf_session__register_idle_thread(struct perf_session *session)
1749 {
1750 struct thread *thread;
1751 int err = 0;
1752
1753 thread = machine__findnew_thread(&session->machines.host, 0, 0);
1754 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1755 pr_err("problem inserting idle task.\n");
1756 err = -1;
1757 }
1758
1759 if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) {
1760 pr_err("problem inserting idle task.\n");
1761 err = -1;
1762 }
1763
1764 /* machine__findnew_thread() got the thread, so put it */
1765 thread__put(thread);
1766 return err;
1767 }
1768
1769 static void
1770 perf_session__warn_order(const struct perf_session *session)
1771 {
1772 const struct ordered_events *oe = &session->ordered_events;
1773 struct evsel *evsel;
1774 bool should_warn = true;
1775
1776 evlist__for_each_entry(session->evlist, evsel) {
1777 if (evsel->core.attr.write_backward)
1778 should_warn = false;
1779 }
1780
1781 if (!should_warn)
1782 return;
1783 if (oe->nr_unordered_events != 0)
1784 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1785 }
1786
1787 static void perf_session__warn_about_errors(const struct perf_session *session)
1788 {
1789 const struct events_stats *stats = &session->evlist->stats;
1790
1791 if (session->tool->lost == perf_event__process_lost &&
1792 stats->nr_events[PERF_RECORD_LOST] != 0) {
1793 ui__warning("Processed %d events and lost %d chunks!\n\n"
1794 "Check IO/CPU overload!\n\n",
1795 stats->nr_events[0],
1796 stats->nr_events[PERF_RECORD_LOST]);
1797 }
1798
1799 if (session->tool->lost_samples == perf_event__process_lost_samples) {
1800 double drop_rate;
1801
1802 drop_rate = (double)stats->total_lost_samples /
1803 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1804 if (drop_rate > 0.05) {
1805 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n",
1806 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1807 drop_rate * 100.0);
1808 }
1809 }
1810
1811 if (session->tool->aux == perf_event__process_aux &&
1812 stats->total_aux_lost != 0) {
1813 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1814 stats->total_aux_lost,
1815 stats->nr_events[PERF_RECORD_AUX]);
1816 }
1817
1818 if (session->tool->aux == perf_event__process_aux &&
1819 stats->total_aux_partial != 0) {
1820 bool vmm_exclusive = false;
1821
1822 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive",
1823 &vmm_exclusive);
1824
1825 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n"
1826 "Are you running a KVM guest in the background?%s\n\n",
1827 stats->total_aux_partial,
1828 stats->nr_events[PERF_RECORD_AUX],
1829 vmm_exclusive ?
1830 "\nReloading kvm_intel module with vmm_exclusive=0\n"
1831 "will reduce the gaps to only guest's timeslices." :
1832 "");
1833 }
1834
1835 if (stats->nr_unknown_events != 0) {
1836 ui__warning("Found %u unknown events!\n\n"
1837 "Is this an older tool processing a perf.data "
1838 "file generated by a more recent tool?\n\n"
1839 "If that is not the case, consider "
1840 "reporting to linux-kernel@vger.kernel.org.\n\n",
1841 stats->nr_unknown_events);
1842 }
1843
1844 if (stats->nr_unknown_id != 0) {
1845 ui__warning("%u samples with id not present in the header\n",
1846 stats->nr_unknown_id);
1847 }
1848
1849 if (stats->nr_invalid_chains != 0) {
1850 ui__warning("Found invalid callchains!\n\n"
1851 "%u out of %u events were discarded for this reason.\n\n"
1852 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1853 stats->nr_invalid_chains,
1854 stats->nr_events[PERF_RECORD_SAMPLE]);
1855 }
1856
1857 if (stats->nr_unprocessable_samples != 0) {
1858 ui__warning("%u unprocessable samples recorded.\n"
1859 "Do you have a KVM guest running and not using 'perf kvm'?\n",
1860 stats->nr_unprocessable_samples);
1861 }
1862
1863 perf_session__warn_order(session);
1864
1865 events_stats__auxtrace_error_warn(stats);
1866
1867 if (stats->nr_proc_map_timeout != 0) {
1868 ui__warning("%d map information files for pre-existing threads were\n"
1869 "not processed, if there are samples for addresses they\n"
1870 "will not be resolved, you may find out which are these\n"
1871 "threads by running with -v and redirecting the output\n"
1872 "to a file.\n"
1873 "The time limit to process proc map is too short?\n"
1874 "Increase it by --proc-map-timeout\n",
1875 stats->nr_proc_map_timeout);
1876 }
1877 }
1878
1879 static int perf_session__flush_thread_stack(struct thread *thread,
1880 void *p __maybe_unused)
1881 {
1882 return thread_stack__flush(thread);
1883 }
1884
1885 static int perf_session__flush_thread_stacks(struct perf_session *session)
1886 {
1887 return machines__for_each_thread(&session->machines,
1888 perf_session__flush_thread_stack,
1889 NULL);
1890 }
1891
1892 volatile int session_done;
1893
1894 static int __perf_session__process_decomp_events(struct perf_session *session);
1895
1896 static int __perf_session__process_pipe_events(struct perf_session *session)
1897 {
1898 struct ordered_events *oe = &session->ordered_events;
1899 struct perf_tool *tool = session->tool;
1900 int fd = perf_data__fd(session->data);
1901 union perf_event *event;
1902 uint32_t size, cur_size = 0;
1903 void *buf = NULL;
1904 s64 skip = 0;
1905 u64 head;
1906 ssize_t err;
1907 void *p;
1908
1909 perf_tool__fill_defaults(tool);
1910
1911 head = 0;
1912 cur_size = sizeof(union perf_event);
1913
1914 buf = malloc(cur_size);
1915 if (!buf)
1916 return -errno;
1917 ordered_events__set_copy_on_queue(oe, true);
1918 more:
1919 event = buf;
1920 err = readn(fd, event, sizeof(struct perf_event_header));
1921 if (err <= 0) {
1922 if (err == 0)
1923 goto done;
1924
1925 pr_err("failed to read event header\n");
1926 goto out_err;
1927 }
1928
1929 if (session->header.needs_swap)
1930 perf_event_header__bswap(&event->header);
1931
1932 size = event->header.size;
1933 if (size < sizeof(struct perf_event_header)) {
1934 pr_err("bad event header size\n");
1935 goto out_err;
1936 }
1937
1938 if (size > cur_size) {
1939 void *new = realloc(buf, size);
1940 if (!new) {
1941 pr_err("failed to allocate memory to read event\n");
1942 goto out_err;
1943 }
1944 buf = new;
1945 cur_size = size;
1946 event = buf;
1947 }
1948 p = event;
1949 p += sizeof(struct perf_event_header);
1950
1951 if (size - sizeof(struct perf_event_header)) {
1952 err = readn(fd, p, size - sizeof(struct perf_event_header));
1953 if (err <= 0) {
1954 if (err == 0) {
1955 pr_err("unexpected end of event stream\n");
1956 goto done;
1957 }
1958
1959 pr_err("failed to read event data\n");
1960 goto out_err;
1961 }
1962 }
1963
1964 if ((skip = perf_session__process_event(session, event, head)) < 0) {
1965 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1966 head, event->header.size, event->header.type);
1967 err = -EINVAL;
1968 goto out_err;
1969 }
1970
1971 head += size;
1972
1973 if (skip > 0)
1974 head += skip;
1975
1976 err = __perf_session__process_decomp_events(session);
1977 if (err)
1978 goto out_err;
1979
1980 if (!session_done())
1981 goto more;
1982 done:
1983 /* do the final flush for ordered samples */
1984 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1985 if (err)
1986 goto out_err;
1987 err = auxtrace__flush_events(session, tool);
1988 if (err)
1989 goto out_err;
1990 err = perf_session__flush_thread_stacks(session);
1991 out_err:
1992 free(buf);
1993 if (!tool->no_warn)
1994 perf_session__warn_about_errors(session);
1995 ordered_events__free(&session->ordered_events);
1996 auxtrace__free_events(session);
1997 return err;
1998 }
1999
2000 static union perf_event *
2001 prefetch_event(char *buf, u64 head, size_t mmap_size,
2002 bool needs_swap, union perf_event *error)
2003 {
2004 union perf_event *event;
2005
2006 /*
2007 * Ensure we have enough space remaining to read
2008 * the size of the event in the headers.
2009 */
2010 if (head + sizeof(event->header) > mmap_size)
2011 return NULL;
2012
2013 event = (union perf_event *)(buf + head);
2014 if (needs_swap)
2015 perf_event_header__bswap(&event->header);
2016
2017 if (head + event->header.size <= mmap_size)
2018 return event;
2019
2020 /* We're not fetching the event so swap back again */
2021 if (needs_swap)
2022 perf_event_header__bswap(&event->header);
2023
2024 pr_debug("%s: head=%#" PRIx64 " event->header_size=%#x, mmap_size=%#zx:"
2025 " fuzzed or compressed perf.data?\n",__func__, head, event->header.size, mmap_size);
2026
2027 return error;
2028 }
2029
2030 static union perf_event *
2031 fetch_mmaped_event(u64 head, size_t mmap_size, char *buf, bool needs_swap)
2032 {
2033 return prefetch_event(buf, head, mmap_size, needs_swap, ERR_PTR(-EINVAL));
2034 }
2035
2036 static union perf_event *
2037 fetch_decomp_event(u64 head, size_t mmap_size, char *buf, bool needs_swap)
2038 {
2039 return prefetch_event(buf, head, mmap_size, needs_swap, NULL);
2040 }
2041
2042 static int __perf_session__process_decomp_events(struct perf_session *session)
2043 {
2044 s64 skip;
2045 u64 size, file_pos = 0;
2046 struct decomp *decomp = session->decomp_last;
2047
2048 if (!decomp)
2049 return 0;
2050
2051 while (decomp->head < decomp->size && !session_done()) {
2052 union perf_event *event = fetch_decomp_event(decomp->head, decomp->size, decomp->data,
2053 session->header.needs_swap);
2054
2055 if (!event)
2056 break;
2057
2058 size = event->header.size;
2059
2060 if (size < sizeof(struct perf_event_header) ||
2061 (skip = perf_session__process_event(session, event, file_pos)) < 0) {
2062 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
2063 decomp->file_pos + decomp->head, event->header.size, event->header.type);
2064 return -EINVAL;
2065 }
2066
2067 if (skip)
2068 size += skip;
2069
2070 decomp->head += size;
2071 }
2072
2073 return 0;
2074 }
2075
2076 /*
2077 * On 64bit we can mmap the data file in one go. No need for tiny mmap
2078 * slices. On 32bit we use 32MB.
2079 */
2080 #if BITS_PER_LONG == 64
2081 #define MMAP_SIZE ULLONG_MAX
2082 #define NUM_MMAPS 1
2083 #else
2084 #define MMAP_SIZE (32 * 1024 * 1024ULL)
2085 #define NUM_MMAPS 128
2086 #endif
2087
2088 struct reader;
2089
2090 typedef s64 (*reader_cb_t)(struct perf_session *session,
2091 union perf_event *event,
2092 u64 file_offset);
2093
2094 struct reader {
2095 int fd;
2096 u64 data_size;
2097 u64 data_offset;
2098 reader_cb_t process;
2099 };
2100
2101 static int
2102 reader__process_events(struct reader *rd, struct perf_session *session,
2103 struct ui_progress *prog)
2104 {
2105 u64 data_size = rd->data_size;
2106 u64 head, page_offset, file_offset, file_pos, size;
2107 int err = 0, mmap_prot, mmap_flags, map_idx = 0;
2108 size_t mmap_size;
2109 char *buf, *mmaps[NUM_MMAPS];
2110 union perf_event *event;
2111 s64 skip;
2112
2113 page_offset = page_size * (rd->data_offset / page_size);
2114 file_offset = page_offset;
2115 head = rd->data_offset - page_offset;
2116
2117 ui_progress__init_size(prog, data_size, "Processing events...");
2118
2119 data_size += rd->data_offset;
2120
2121 mmap_size = MMAP_SIZE;
2122 if (mmap_size > data_size) {
2123 mmap_size = data_size;
2124 session->one_mmap = true;
2125 }
2126
2127 memset(mmaps, 0, sizeof(mmaps));
2128
2129 mmap_prot = PROT_READ;
2130 mmap_flags = MAP_SHARED;
2131
2132 if (session->header.needs_swap) {
2133 mmap_prot |= PROT_WRITE;
2134 mmap_flags = MAP_PRIVATE;
2135 }
2136 remap:
2137 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, rd->fd,
2138 file_offset);
2139 if (buf == MAP_FAILED) {
2140 pr_err("failed to mmap file\n");
2141 err = -errno;
2142 goto out;
2143 }
2144 mmaps[map_idx] = buf;
2145 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
2146 file_pos = file_offset + head;
2147 if (session->one_mmap) {
2148 session->one_mmap_addr = buf;
2149 session->one_mmap_offset = file_offset;
2150 }
2151
2152 more:
2153 event = fetch_mmaped_event(head, mmap_size, buf, session->header.needs_swap);
2154 if (IS_ERR(event))
2155 return PTR_ERR(event);
2156
2157 if (!event) {
2158 if (mmaps[map_idx]) {
2159 munmap(mmaps[map_idx], mmap_size);
2160 mmaps[map_idx] = NULL;
2161 }
2162
2163 page_offset = page_size * (head / page_size);
2164 file_offset += page_offset;
2165 head -= page_offset;
2166 goto remap;
2167 }
2168
2169 size = event->header.size;
2170
2171 skip = -EINVAL;
2172
2173 if (size < sizeof(struct perf_event_header) ||
2174 (skip = rd->process(session, event, file_pos)) < 0) {
2175 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n",
2176 file_offset + head, event->header.size,
2177 event->header.type, strerror(-skip));
2178 err = skip;
2179 goto out;
2180 }
2181
2182 if (skip)
2183 size += skip;
2184
2185 head += size;
2186 file_pos += size;
2187
2188 err = __perf_session__process_decomp_events(session);
2189 if (err)
2190 goto out;
2191
2192 ui_progress__update(prog, size);
2193
2194 if (session_done())
2195 goto out;
2196
2197 if (file_pos < data_size)
2198 goto more;
2199
2200 out:
2201 return err;
2202 }
2203
2204 static s64 process_simple(struct perf_session *session,
2205 union perf_event *event,
2206 u64 file_offset)
2207 {
2208 return perf_session__process_event(session, event, file_offset);
2209 }
2210
2211 static int __perf_session__process_events(struct perf_session *session)
2212 {
2213 struct reader rd = {
2214 .fd = perf_data__fd(session->data),
2215 .data_size = session->header.data_size,
2216 .data_offset = session->header.data_offset,
2217 .process = process_simple,
2218 };
2219 struct ordered_events *oe = &session->ordered_events;
2220 struct perf_tool *tool = session->tool;
2221 struct ui_progress prog;
2222 int err;
2223
2224 perf_tool__fill_defaults(tool);
2225
2226 if (rd.data_size == 0)
2227 return -1;
2228
2229 ui_progress__init_size(&prog, rd.data_size, "Processing events...");
2230
2231 err = reader__process_events(&rd, session, &prog);
2232 if (err)
2233 goto out_err;
2234 /* do the final flush for ordered samples */
2235 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
2236 if (err)
2237 goto out_err;
2238 err = auxtrace__flush_events(session, tool);
2239 if (err)
2240 goto out_err;
2241 err = perf_session__flush_thread_stacks(session);
2242 out_err:
2243 ui_progress__finish();
2244 if (!tool->no_warn)
2245 perf_session__warn_about_errors(session);
2246 /*
2247 * We may switching perf.data output, make ordered_events
2248 * reusable.
2249 */
2250 ordered_events__reinit(&session->ordered_events);
2251 auxtrace__free_events(session);
2252 session->one_mmap = false;
2253 return err;
2254 }
2255
2256 int perf_session__process_events(struct perf_session *session)
2257 {
2258 if (perf_session__register_idle_thread(session) < 0)
2259 return -ENOMEM;
2260
2261 if (perf_data__is_pipe(session->data))
2262 return __perf_session__process_pipe_events(session);
2263
2264 return __perf_session__process_events(session);
2265 }
2266
2267 bool perf_session__has_traces(struct perf_session *session, const char *msg)
2268 {
2269 struct evsel *evsel;
2270
2271 evlist__for_each_entry(session->evlist, evsel) {
2272 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT)
2273 return true;
2274 }
2275
2276 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
2277 return false;
2278 }
2279
2280 int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr)
2281 {
2282 char *bracket;
2283 struct ref_reloc_sym *ref;
2284 struct kmap *kmap;
2285
2286 ref = zalloc(sizeof(struct ref_reloc_sym));
2287 if (ref == NULL)
2288 return -ENOMEM;
2289
2290 ref->name = strdup(symbol_name);
2291 if (ref->name == NULL) {
2292 free(ref);
2293 return -ENOMEM;
2294 }
2295
2296 bracket = strchr(ref->name, ']');
2297 if (bracket)
2298 *bracket = '\0';
2299
2300 ref->addr = addr;
2301
2302 kmap = map__kmap(map);
2303 if (kmap)
2304 kmap->ref_reloc_sym = ref;
2305
2306 return 0;
2307 }
2308
2309 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
2310 {
2311 return machines__fprintf_dsos(&session->machines, fp);
2312 }
2313
2314 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
2315 bool (skip)(struct dso *dso, int parm), int parm)
2316 {
2317 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
2318 }
2319
2320 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
2321 {
2322 size_t ret;
2323 const char *msg = "";
2324
2325 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
2326 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
2327
2328 ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
2329
2330 ret += events_stats__fprintf(&session->evlist->stats, fp);
2331 return ret;
2332 }
2333
2334 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
2335 {
2336 /*
2337 * FIXME: Here we have to actually print all the machines in this
2338 * session, not just the host...
2339 */
2340 return machine__fprintf(&session->machines.host, fp);
2341 }
2342
2343 struct evsel *perf_session__find_first_evtype(struct perf_session *session,
2344 unsigned int type)
2345 {
2346 struct evsel *pos;
2347
2348 evlist__for_each_entry(session->evlist, pos) {
2349 if (pos->core.attr.type == type)
2350 return pos;
2351 }
2352 return NULL;
2353 }
2354
2355 int perf_session__cpu_bitmap(struct perf_session *session,
2356 const char *cpu_list, unsigned long *cpu_bitmap)
2357 {
2358 int i, err = -1;
2359 struct perf_cpu_map *map;
2360 int nr_cpus = min(session->header.env.nr_cpus_online, MAX_NR_CPUS);
2361
2362 for (i = 0; i < PERF_TYPE_MAX; ++i) {
2363 struct evsel *evsel;
2364
2365 evsel = perf_session__find_first_evtype(session, i);
2366 if (!evsel)
2367 continue;
2368
2369 if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CPU)) {
2370 pr_err("File does not contain CPU events. "
2371 "Remove -C option to proceed.\n");
2372 return -1;
2373 }
2374 }
2375
2376 map = perf_cpu_map__new(cpu_list);
2377 if (map == NULL) {
2378 pr_err("Invalid cpu_list\n");
2379 return -1;
2380 }
2381
2382 for (i = 0; i < map->nr; i++) {
2383 int cpu = map->map[i];
2384
2385 if (cpu >= nr_cpus) {
2386 pr_err("Requested CPU %d too large. "
2387 "Consider raising MAX_NR_CPUS\n", cpu);
2388 goto out_delete_map;
2389 }
2390
2391 set_bit(cpu, cpu_bitmap);
2392 }
2393
2394 err = 0;
2395
2396 out_delete_map:
2397 perf_cpu_map__put(map);
2398 return err;
2399 }
2400
2401 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
2402 bool full)
2403 {
2404 if (session == NULL || fp == NULL)
2405 return;
2406
2407 fprintf(fp, "# ========\n");
2408 perf_header__fprintf_info(session, fp, full);
2409 fprintf(fp, "# ========\n#\n");
2410 }
2411
2412 int perf_event__process_id_index(struct perf_session *session,
2413 union perf_event *event)
2414 {
2415 struct evlist *evlist = session->evlist;
2416 struct perf_record_id_index *ie = &event->id_index;
2417 size_t i, nr, max_nr;
2418
2419 max_nr = (ie->header.size - sizeof(struct perf_record_id_index)) /
2420 sizeof(struct id_index_entry);
2421 nr = ie->nr;
2422 if (nr > max_nr)
2423 return -EINVAL;
2424
2425 if (dump_trace)
2426 fprintf(stdout, " nr: %zu\n", nr);
2427
2428 for (i = 0; i < nr; i++) {
2429 struct id_index_entry *e = &ie->entries[i];
2430 struct perf_sample_id *sid;
2431
2432 if (dump_trace) {
2433 fprintf(stdout, " ... id: %"PRI_lu64, e->id);
2434 fprintf(stdout, " idx: %"PRI_lu64, e->idx);
2435 fprintf(stdout, " cpu: %"PRI_ld64, e->cpu);
2436 fprintf(stdout, " tid: %"PRI_ld64"\n", e->tid);
2437 }
2438
2439 sid = perf_evlist__id2sid(evlist, e->id);
2440 if (!sid)
2441 return -ENOENT;
2442 sid->idx = e->idx;
2443 sid->cpu = e->cpu;
2444 sid->tid = e->tid;
2445 }
2446 return 0;
2447 }
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