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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / tools / perf / util / session.c
blobd0d7d25b23e3b049fc708132d7ff989117b71b9d
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->fork == NULL)
475 tool->fork = process_event_stub;
476 if (tool->exit == NULL)
477 tool->exit = process_event_stub;
478 if (tool->lost == NULL)
479 tool->lost = perf_event__process_lost;
480 if (tool->lost_samples == NULL)
481 tool->lost_samples = perf_event__process_lost_samples;
482 if (tool->aux == NULL)
483 tool->aux = perf_event__process_aux;
484 if (tool->itrace_start == NULL)
485 tool->itrace_start = perf_event__process_itrace_start;
486 if (tool->context_switch == NULL)
487 tool->context_switch = perf_event__process_switch;
488 if (tool->ksymbol == NULL)
489 tool->ksymbol = perf_event__process_ksymbol;
490 if (tool->bpf == NULL)
491 tool->bpf = perf_event__process_bpf;
492 if (tool->read == NULL)
493 tool->read = process_event_sample_stub;
494 if (tool->throttle == NULL)
495 tool->throttle = process_event_stub;
496 if (tool->unthrottle == NULL)
497 tool->unthrottle = process_event_stub;
498 if (tool->attr == NULL)
499 tool->attr = process_event_synth_attr_stub;
500 if (tool->event_update == NULL)
501 tool->event_update = process_event_synth_event_update_stub;
502 if (tool->tracing_data == NULL)
503 tool->tracing_data = process_event_synth_tracing_data_stub;
504 if (tool->build_id == NULL)
505 tool->build_id = process_event_op2_stub;
506 if (tool->finished_round == NULL) {
507 if (tool->ordered_events)
508 tool->finished_round = process_finished_round;
509 else
510 tool->finished_round = process_finished_round_stub;
511 }
512 if (tool->id_index == NULL)
513 tool->id_index = process_event_op2_stub;
514 if (tool->auxtrace_info == NULL)
515 tool->auxtrace_info = process_event_op2_stub;
516 if (tool->auxtrace == NULL)
517 tool->auxtrace = process_event_auxtrace_stub;
518 if (tool->auxtrace_error == NULL)
519 tool->auxtrace_error = process_event_op2_stub;
520 if (tool->thread_map == NULL)
521 tool->thread_map = process_event_thread_map_stub;
522 if (tool->cpu_map == NULL)
523 tool->cpu_map = process_event_cpu_map_stub;
524 if (tool->stat_config == NULL)
525 tool->stat_config = process_event_stat_config_stub;
526 if (tool->stat == NULL)
527 tool->stat = process_stat_stub;
528 if (tool->stat_round == NULL)
529 tool->stat_round = process_stat_round_stub;
530 if (tool->time_conv == NULL)
531 tool->time_conv = process_event_op2_stub;
532 if (tool->feature == NULL)
533 tool->feature = process_event_op2_stub;
534 if (tool->compressed == NULL)
535 tool->compressed = perf_session__process_compressed_event;
536 }
537
538 static void swap_sample_id_all(union perf_event *event, void *data)
539 {
540 void *end = (void *) event + event->header.size;
541 int size = end - data;
542
543 BUG_ON(size % sizeof(u64));
544 mem_bswap_64(data, size);
545 }
546
547 static void perf_event__all64_swap(union perf_event *event,
548 bool sample_id_all __maybe_unused)
549 {
550 struct perf_event_header *hdr = &event->header;
551 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
552 }
553
554 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
555 {
556 event->comm.pid = bswap_32(event->comm.pid);
557 event->comm.tid = bswap_32(event->comm.tid);
558
559 if (sample_id_all) {
560 void *data = &event->comm.comm;
561
562 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
563 swap_sample_id_all(event, data);
564 }
565 }
566
567 static void perf_event__mmap_swap(union perf_event *event,
568 bool sample_id_all)
569 {
570 event->mmap.pid = bswap_32(event->mmap.pid);
571 event->mmap.tid = bswap_32(event->mmap.tid);
572 event->mmap.start = bswap_64(event->mmap.start);
573 event->mmap.len = bswap_64(event->mmap.len);
574 event->mmap.pgoff = bswap_64(event->mmap.pgoff);
575
576 if (sample_id_all) {
577 void *data = &event->mmap.filename;
578
579 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
580 swap_sample_id_all(event, data);
581 }
582 }
583
584 static void perf_event__mmap2_swap(union perf_event *event,
585 bool sample_id_all)
586 {
587 event->mmap2.pid = bswap_32(event->mmap2.pid);
588 event->mmap2.tid = bswap_32(event->mmap2.tid);
589 event->mmap2.start = bswap_64(event->mmap2.start);
590 event->mmap2.len = bswap_64(event->mmap2.len);
591 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
592 event->mmap2.maj = bswap_32(event->mmap2.maj);
593 event->mmap2.min = bswap_32(event->mmap2.min);
594 event->mmap2.ino = bswap_64(event->mmap2.ino);
595
596 if (sample_id_all) {
597 void *data = &event->mmap2.filename;
598
599 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
600 swap_sample_id_all(event, data);
601 }
602 }
603 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
604 {
605 event->fork.pid = bswap_32(event->fork.pid);
606 event->fork.tid = bswap_32(event->fork.tid);
607 event->fork.ppid = bswap_32(event->fork.ppid);
608 event->fork.ptid = bswap_32(event->fork.ptid);
609 event->fork.time = bswap_64(event->fork.time);
610
611 if (sample_id_all)
612 swap_sample_id_all(event, &event->fork + 1);
613 }
614
615 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
616 {
617 event->read.pid = bswap_32(event->read.pid);
618 event->read.tid = bswap_32(event->read.tid);
619 event->read.value = bswap_64(event->read.value);
620 event->read.time_enabled = bswap_64(event->read.time_enabled);
621 event->read.time_running = bswap_64(event->read.time_running);
622 event->read.id = bswap_64(event->read.id);
623
624 if (sample_id_all)
625 swap_sample_id_all(event, &event->read + 1);
626 }
627
628 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
629 {
630 event->aux.aux_offset = bswap_64(event->aux.aux_offset);
631 event->aux.aux_size = bswap_64(event->aux.aux_size);
632 event->aux.flags = bswap_64(event->aux.flags);
633
634 if (sample_id_all)
635 swap_sample_id_all(event, &event->aux + 1);
636 }
637
638 static void perf_event__itrace_start_swap(union perf_event *event,
639 bool sample_id_all)
640 {
641 event->itrace_start.pid = bswap_32(event->itrace_start.pid);
642 event->itrace_start.tid = bswap_32(event->itrace_start.tid);
643
644 if (sample_id_all)
645 swap_sample_id_all(event, &event->itrace_start + 1);
646 }
647
648 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
649 {
650 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
651 event->context_switch.next_prev_pid =
652 bswap_32(event->context_switch.next_prev_pid);
653 event->context_switch.next_prev_tid =
654 bswap_32(event->context_switch.next_prev_tid);
655 }
656
657 if (sample_id_all)
658 swap_sample_id_all(event, &event->context_switch + 1);
659 }
660
661 static void perf_event__throttle_swap(union perf_event *event,
662 bool sample_id_all)
663 {
664 event->throttle.time = bswap_64(event->throttle.time);
665 event->throttle.id = bswap_64(event->throttle.id);
666 event->throttle.stream_id = bswap_64(event->throttle.stream_id);
667
668 if (sample_id_all)
669 swap_sample_id_all(event, &event->throttle + 1);
670 }
671
672 static void perf_event__namespaces_swap(union perf_event *event,
673 bool sample_id_all)
674 {
675 u64 i;
676
677 event->namespaces.pid = bswap_32(event->namespaces.pid);
678 event->namespaces.tid = bswap_32(event->namespaces.tid);
679 event->namespaces.nr_namespaces = bswap_64(event->namespaces.nr_namespaces);
680
681 for (i = 0; i < event->namespaces.nr_namespaces; i++) {
682 struct perf_ns_link_info *ns = &event->namespaces.link_info[i];
683
684 ns->dev = bswap_64(ns->dev);
685 ns->ino = bswap_64(ns->ino);
686 }
687
688 if (sample_id_all)
689 swap_sample_id_all(event, &event->namespaces.link_info[i]);
690 }
691
692 static u8 revbyte(u8 b)
693 {
694 int rev = (b >> 4) | ((b & 0xf) << 4);
695 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
696 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
697 return (u8) rev;
698 }
699
700 /*
701 * XXX this is hack in attempt to carry flags bitfield
702 * through endian village. ABI says:
703 *
704 * Bit-fields are allocated from right to left (least to most significant)
705 * on little-endian implementations and from left to right (most to least
706 * significant) on big-endian implementations.
707 *
708 * The above seems to be byte specific, so we need to reverse each
709 * byte of the bitfield. 'Internet' also says this might be implementation
710 * specific and we probably need proper fix and carry perf_event_attr
711 * bitfield flags in separate data file FEAT_ section. Thought this seems
712 * to work for now.
713 */
714 static void swap_bitfield(u8 *p, unsigned len)
715 {
716 unsigned i;
717
718 for (i = 0; i < len; i++) {
719 *p = revbyte(*p);
720 p++;
721 }
722 }
723
724 /* exported for swapping attributes in file header */
725 void perf_event__attr_swap(struct perf_event_attr *attr)
726 {
727 attr->type = bswap_32(attr->type);
728 attr->size = bswap_32(attr->size);
729
730 #define bswap_safe(f, n) \
731 (attr->size > (offsetof(struct perf_event_attr, f) + \
732 sizeof(attr->f) * (n)))
733 #define bswap_field(f, sz) \
734 do { \
735 if (bswap_safe(f, 0)) \
736 attr->f = bswap_##sz(attr->f); \
737 } while(0)
738 #define bswap_field_16(f) bswap_field(f, 16)
739 #define bswap_field_32(f) bswap_field(f, 32)
740 #define bswap_field_64(f) bswap_field(f, 64)
741
742 bswap_field_64(config);
743 bswap_field_64(sample_period);
744 bswap_field_64(sample_type);
745 bswap_field_64(read_format);
746 bswap_field_32(wakeup_events);
747 bswap_field_32(bp_type);
748 bswap_field_64(bp_addr);
749 bswap_field_64(bp_len);
750 bswap_field_64(branch_sample_type);
751 bswap_field_64(sample_regs_user);
752 bswap_field_32(sample_stack_user);
753 bswap_field_32(aux_watermark);
754 bswap_field_16(sample_max_stack);
755 bswap_field_32(aux_sample_size);
756
757 /*
758 * After read_format are bitfields. Check read_format because
759 * we are unable to use offsetof on bitfield.
760 */
761 if (bswap_safe(read_format, 1))
762 swap_bitfield((u8 *) (&attr->read_format + 1),
763 sizeof(u64));
764 #undef bswap_field_64
765 #undef bswap_field_32
766 #undef bswap_field
767 #undef bswap_safe
768 }
769
770 static void perf_event__hdr_attr_swap(union perf_event *event,
771 bool sample_id_all __maybe_unused)
772 {
773 size_t size;
774
775 perf_event__attr_swap(&event->attr.attr);
776
777 size = event->header.size;
778 size -= (void *)&event->attr.id - (void *)event;
779 mem_bswap_64(event->attr.id, size);
780 }
781
782 static void perf_event__event_update_swap(union perf_event *event,
783 bool sample_id_all __maybe_unused)
784 {
785 event->event_update.type = bswap_64(event->event_update.type);
786 event->event_update.id = bswap_64(event->event_update.id);
787 }
788
789 static void perf_event__event_type_swap(union perf_event *event,
790 bool sample_id_all __maybe_unused)
791 {
792 event->event_type.event_type.event_id =
793 bswap_64(event->event_type.event_type.event_id);
794 }
795
796 static void perf_event__tracing_data_swap(union perf_event *event,
797 bool sample_id_all __maybe_unused)
798 {
799 event->tracing_data.size = bswap_32(event->tracing_data.size);
800 }
801
802 static void perf_event__auxtrace_info_swap(union perf_event *event,
803 bool sample_id_all __maybe_unused)
804 {
805 size_t size;
806
807 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
808
809 size = event->header.size;
810 size -= (void *)&event->auxtrace_info.priv - (void *)event;
811 mem_bswap_64(event->auxtrace_info.priv, size);
812 }
813
814 static void perf_event__auxtrace_swap(union perf_event *event,
815 bool sample_id_all __maybe_unused)
816 {
817 event->auxtrace.size = bswap_64(event->auxtrace.size);
818 event->auxtrace.offset = bswap_64(event->auxtrace.offset);
819 event->auxtrace.reference = bswap_64(event->auxtrace.reference);
820 event->auxtrace.idx = bswap_32(event->auxtrace.idx);
821 event->auxtrace.tid = bswap_32(event->auxtrace.tid);
822 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu);
823 }
824
825 static void perf_event__auxtrace_error_swap(union perf_event *event,
826 bool sample_id_all __maybe_unused)
827 {
828 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
829 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
830 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu);
831 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid);
832 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid);
833 event->auxtrace_error.fmt = bswap_32(event->auxtrace_error.fmt);
834 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip);
835 if (event->auxtrace_error.fmt)
836 event->auxtrace_error.time = bswap_64(event->auxtrace_error.time);
837 }
838
839 static void perf_event__thread_map_swap(union perf_event *event,
840 bool sample_id_all __maybe_unused)
841 {
842 unsigned i;
843
844 event->thread_map.nr = bswap_64(event->thread_map.nr);
845
846 for (i = 0; i < event->thread_map.nr; i++)
847 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
848 }
849
850 static void perf_event__cpu_map_swap(union perf_event *event,
851 bool sample_id_all __maybe_unused)
852 {
853 struct perf_record_cpu_map_data *data = &event->cpu_map.data;
854 struct cpu_map_entries *cpus;
855 struct perf_record_record_cpu_map *mask;
856 unsigned i;
857
858 data->type = bswap_64(data->type);
859
860 switch (data->type) {
861 case PERF_CPU_MAP__CPUS:
862 cpus = (struct cpu_map_entries *)data->data;
863
864 cpus->nr = bswap_16(cpus->nr);
865
866 for (i = 0; i < cpus->nr; i++)
867 cpus->cpu[i] = bswap_16(cpus->cpu[i]);
868 break;
869 case PERF_CPU_MAP__MASK:
870 mask = (struct perf_record_record_cpu_map *)data->data;
871
872 mask->nr = bswap_16(mask->nr);
873 mask->long_size = bswap_16(mask->long_size);
874
875 switch (mask->long_size) {
876 case 4: mem_bswap_32(&mask->mask, mask->nr); break;
877 case 8: mem_bswap_64(&mask->mask, mask->nr); break;
878 default:
879 pr_err("cpu_map swap: unsupported long size\n");
880 }
881 default:
882 break;
883 }
884 }
885
886 static void perf_event__stat_config_swap(union perf_event *event,
887 bool sample_id_all __maybe_unused)
888 {
889 u64 size;
890
891 size = event->stat_config.nr * sizeof(event->stat_config.data[0]);
892 size += 1; /* nr item itself */
893 mem_bswap_64(&event->stat_config.nr, size);
894 }
895
896 static void perf_event__stat_swap(union perf_event *event,
897 bool sample_id_all __maybe_unused)
898 {
899 event->stat.id = bswap_64(event->stat.id);
900 event->stat.thread = bswap_32(event->stat.thread);
901 event->stat.cpu = bswap_32(event->stat.cpu);
902 event->stat.val = bswap_64(event->stat.val);
903 event->stat.ena = bswap_64(event->stat.ena);
904 event->stat.run = bswap_64(event->stat.run);
905 }
906
907 static void perf_event__stat_round_swap(union perf_event *event,
908 bool sample_id_all __maybe_unused)
909 {
910 event->stat_round.type = bswap_64(event->stat_round.type);
911 event->stat_round.time = bswap_64(event->stat_round.time);
912 }
913
914 typedef void (*perf_event__swap_op)(union perf_event *event,
915 bool sample_id_all);
916
917 static perf_event__swap_op perf_event__swap_ops[] = {
918 [PERF_RECORD_MMAP] = perf_event__mmap_swap,
919 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap,
920 [PERF_RECORD_COMM] = perf_event__comm_swap,
921 [PERF_RECORD_FORK] = perf_event__task_swap,
922 [PERF_RECORD_EXIT] = perf_event__task_swap,
923 [PERF_RECORD_LOST] = perf_event__all64_swap,
924 [PERF_RECORD_READ] = perf_event__read_swap,
925 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap,
926 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap,
927 [PERF_RECORD_SAMPLE] = perf_event__all64_swap,
928 [PERF_RECORD_AUX] = perf_event__aux_swap,
929 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap,
930 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap,
931 [PERF_RECORD_SWITCH] = perf_event__switch_swap,
932 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap,
933 [PERF_RECORD_NAMESPACES] = perf_event__namespaces_swap,
934 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
935 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
936 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
937 [PERF_RECORD_HEADER_BUILD_ID] = NULL,
938 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap,
939 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap,
940 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap,
941 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap,
942 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap,
943 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap,
944 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap,
945 [PERF_RECORD_STAT] = perf_event__stat_swap,
946 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap,
947 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap,
948 [PERF_RECORD_TIME_CONV] = perf_event__all64_swap,
949 [PERF_RECORD_HEADER_MAX] = NULL,
950 };
951
952 /*
953 * When perf record finishes a pass on every buffers, it records this pseudo
954 * event.
955 * We record the max timestamp t found in the pass n.
956 * Assuming these timestamps are monotonic across cpus, we know that if
957 * a buffer still has events with timestamps below t, they will be all
958 * available and then read in the pass n + 1.
959 * Hence when we start to read the pass n + 2, we can safely flush every
960 * events with timestamps below t.
961 *
962 * ============ PASS n =================
963 * CPU 0 | CPU 1
964 * |
965 * cnt1 timestamps | cnt2 timestamps
966 * 1 | 2
967 * 2 | 3
968 * - | 4 <--- max recorded
969 *
970 * ============ PASS n + 1 ==============
971 * CPU 0 | CPU 1
972 * |
973 * cnt1 timestamps | cnt2 timestamps
974 * 3 | 5
975 * 4 | 6
976 * 5 | 7 <---- max recorded
977 *
978 * Flush every events below timestamp 4
979 *
980 * ============ PASS n + 2 ==============
981 * CPU 0 | CPU 1
982 * |
983 * cnt1 timestamps | cnt2 timestamps
984 * 6 | 8
985 * 7 | 9
986 * - | 10
987 *
988 * Flush every events below timestamp 7
989 * etc...
990 */
991 static int process_finished_round(struct perf_tool *tool __maybe_unused,
992 union perf_event *event __maybe_unused,
993 struct ordered_events *oe)
994 {
995 if (dump_trace)
996 fprintf(stdout, "\n");
997 return ordered_events__flush(oe, OE_FLUSH__ROUND);
998 }
999
1000 int perf_session__queue_event(struct perf_session *s, union perf_event *event,
1001 u64 timestamp, u64 file_offset)
1002 {
1003 return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset);
1004 }
1005
1006 static void callchain__lbr_callstack_printf(struct perf_sample *sample)
1007 {
1008 struct ip_callchain *callchain = sample->callchain;
1009 struct branch_stack *lbr_stack = sample->branch_stack;
1010 u64 kernel_callchain_nr = callchain->nr;
1011 unsigned int i;
1012
1013 for (i = 0; i < kernel_callchain_nr; i++) {
1014 if (callchain->ips[i] == PERF_CONTEXT_USER)
1015 break;
1016 }
1017
1018 if ((i != kernel_callchain_nr) && lbr_stack->nr) {
1019 u64 total_nr;
1020 /*
1021 * LBR callstack can only get user call chain,
1022 * i is kernel call chain number,
1023 * 1 is PERF_CONTEXT_USER.
1024 *
1025 * The user call chain is stored in LBR registers.
1026 * LBR are pair registers. The caller is stored
1027 * in "from" register, while the callee is stored
1028 * in "to" register.
1029 * For example, there is a call stack
1030 * "A"->"B"->"C"->"D".
1031 * The LBR registers will recorde like
1032 * "C"->"D", "B"->"C", "A"->"B".
1033 * So only the first "to" register and all "from"
1034 * registers are needed to construct the whole stack.
1035 */
1036 total_nr = i + 1 + lbr_stack->nr + 1;
1037 kernel_callchain_nr = i + 1;
1038
1039 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
1040
1041 for (i = 0; i < kernel_callchain_nr; i++)
1042 printf("..... %2d: %016" PRIx64 "\n",
1043 i, callchain->ips[i]);
1044
1045 printf("..... %2d: %016" PRIx64 "\n",
1046 (int)(kernel_callchain_nr), lbr_stack->entries[0].to);
1047 for (i = 0; i < lbr_stack->nr; i++)
1048 printf("..... %2d: %016" PRIx64 "\n",
1049 (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from);
1050 }
1051 }
1052
1053 static void callchain__printf(struct evsel *evsel,
1054 struct perf_sample *sample)
1055 {
1056 unsigned int i;
1057 struct ip_callchain *callchain = sample->callchain;
1058
1059 if (perf_evsel__has_branch_callstack(evsel))
1060 callchain__lbr_callstack_printf(sample);
1061
1062 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
1063
1064 for (i = 0; i < callchain->nr; i++)
1065 printf("..... %2d: %016" PRIx64 "\n",
1066 i, callchain->ips[i]);
1067 }
1068
1069 static void branch_stack__printf(struct perf_sample *sample, bool callstack)
1070 {
1071 uint64_t i;
1072
1073 printf("%s: nr:%" PRIu64 "\n",
1074 !callstack ? "... branch stack" : "... branch callstack",
1075 sample->branch_stack->nr);
1076
1077 for (i = 0; i < sample->branch_stack->nr; i++) {
1078 struct branch_entry *e = &sample->branch_stack->entries[i];
1079
1080 if (!callstack) {
1081 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n",
1082 i, e->from, e->to,
1083 (unsigned short)e->flags.cycles,
1084 e->flags.mispred ? "M" : " ",
1085 e->flags.predicted ? "P" : " ",
1086 e->flags.abort ? "A" : " ",
1087 e->flags.in_tx ? "T" : " ",
1088 (unsigned)e->flags.reserved);
1089 } else {
1090 printf("..... %2"PRIu64": %016" PRIx64 "\n",
1091 i, i > 0 ? e->from : e->to);
1092 }
1093 }
1094 }
1095
1096 static void regs_dump__printf(u64 mask, u64 *regs)
1097 {
1098 unsigned rid, i = 0;
1099
1100 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
1101 u64 val = regs[i++];
1102
1103 printf(".... %-5s 0x%" PRIx64 "\n",
1104 perf_reg_name(rid), val);
1105 }
1106 }
1107
1108 static const char *regs_abi[] = {
1109 [PERF_SAMPLE_REGS_ABI_NONE] = "none",
1110 [PERF_SAMPLE_REGS_ABI_32] = "32-bit",
1111 [PERF_SAMPLE_REGS_ABI_64] = "64-bit",
1112 };
1113
1114 static inline const char *regs_dump_abi(struct regs_dump *d)
1115 {
1116 if (d->abi > PERF_SAMPLE_REGS_ABI_64)
1117 return "unknown";
1118
1119 return regs_abi[d->abi];
1120 }
1121
1122 static void regs__printf(const char *type, struct regs_dump *regs)
1123 {
1124 u64 mask = regs->mask;
1125
1126 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
1127 type,
1128 mask,
1129 regs_dump_abi(regs));
1130
1131 regs_dump__printf(mask, regs->regs);
1132 }
1133
1134 static void regs_user__printf(struct perf_sample *sample)
1135 {
1136 struct regs_dump *user_regs = &sample->user_regs;
1137
1138 if (user_regs->regs)
1139 regs__printf("user", user_regs);
1140 }
1141
1142 static void regs_intr__printf(struct perf_sample *sample)
1143 {
1144 struct regs_dump *intr_regs = &sample->intr_regs;
1145
1146 if (intr_regs->regs)
1147 regs__printf("intr", intr_regs);
1148 }
1149
1150 static void stack_user__printf(struct stack_dump *dump)
1151 {
1152 printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
1153 dump->size, dump->offset);
1154 }
1155
1156 static void perf_evlist__print_tstamp(struct evlist *evlist,
1157 union perf_event *event,
1158 struct perf_sample *sample)
1159 {
1160 u64 sample_type = __perf_evlist__combined_sample_type(evlist);
1161
1162 if (event->header.type != PERF_RECORD_SAMPLE &&
1163 !perf_evlist__sample_id_all(evlist)) {
1164 fputs("-1 -1 ", stdout);
1165 return;
1166 }
1167
1168 if ((sample_type & PERF_SAMPLE_CPU))
1169 printf("%u ", sample->cpu);
1170
1171 if (sample_type & PERF_SAMPLE_TIME)
1172 printf("%" PRIu64 " ", sample->time);
1173 }
1174
1175 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
1176 {
1177 printf("... sample_read:\n");
1178
1179 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1180 printf("...... time enabled %016" PRIx64 "\n",
1181 sample->read.time_enabled);
1182
1183 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1184 printf("...... time running %016" PRIx64 "\n",
1185 sample->read.time_running);
1186
1187 if (read_format & PERF_FORMAT_GROUP) {
1188 u64 i;
1189
1190 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
1191
1192 for (i = 0; i < sample->read.group.nr; i++) {
1193 struct sample_read_value *value;
1194
1195 value = &sample->read.group.values[i];
1196 printf("..... id %016" PRIx64
1197 ", value %016" PRIx64 "\n",
1198 value->id, value->value);
1199 }
1200 } else
1201 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
1202 sample->read.one.id, sample->read.one.value);
1203 }
1204
1205 static void dump_event(struct evlist *evlist, union perf_event *event,
1206 u64 file_offset, struct perf_sample *sample)
1207 {
1208 if (!dump_trace)
1209 return;
1210
1211 printf("\n%#" PRIx64 " [%#x]: event: %d\n",
1212 file_offset, event->header.size, event->header.type);
1213
1214 trace_event(event);
1215 if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw)
1216 evlist->trace_event_sample_raw(evlist, event, sample);
1217
1218 if (sample)
1219 perf_evlist__print_tstamp(evlist, event, sample);
1220
1221 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
1222 event->header.size, perf_event__name(event->header.type));
1223 }
1224
1225 static void dump_sample(struct evsel *evsel, union perf_event *event,
1226 struct perf_sample *sample)
1227 {
1228 u64 sample_type;
1229
1230 if (!dump_trace)
1231 return;
1232
1233 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
1234 event->header.misc, sample->pid, sample->tid, sample->ip,
1235 sample->period, sample->addr);
1236
1237 sample_type = evsel->core.attr.sample_type;
1238
1239 if (evsel__has_callchain(evsel))
1240 callchain__printf(evsel, sample);
1241
1242 if (sample_type & PERF_SAMPLE_BRANCH_STACK)
1243 branch_stack__printf(sample, perf_evsel__has_branch_callstack(evsel));
1244
1245 if (sample_type & PERF_SAMPLE_REGS_USER)
1246 regs_user__printf(sample);
1247
1248 if (sample_type & PERF_SAMPLE_REGS_INTR)
1249 regs_intr__printf(sample);
1250
1251 if (sample_type & PERF_SAMPLE_STACK_USER)
1252 stack_user__printf(&sample->user_stack);
1253
1254 if (sample_type & PERF_SAMPLE_WEIGHT)
1255 printf("... weight: %" PRIu64 "\n", sample->weight);
1256
1257 if (sample_type & PERF_SAMPLE_DATA_SRC)
1258 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
1259
1260 if (sample_type & PERF_SAMPLE_PHYS_ADDR)
1261 printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr);
1262
1263 if (sample_type & PERF_SAMPLE_TRANSACTION)
1264 printf("... transaction: %" PRIx64 "\n", sample->transaction);
1265
1266 if (sample_type & PERF_SAMPLE_READ)
1267 sample_read__printf(sample, evsel->core.attr.read_format);
1268 }
1269
1270 static void dump_read(struct evsel *evsel, union perf_event *event)
1271 {
1272 struct perf_record_read *read_event = &event->read;
1273 u64 read_format;
1274
1275 if (!dump_trace)
1276 return;
1277
1278 printf(": %d %d %s %" PRI_lu64 "\n", event->read.pid, event->read.tid,
1279 perf_evsel__name(evsel),
1280 event->read.value);
1281
1282 if (!evsel)
1283 return;
1284
1285 read_format = evsel->core.attr.read_format;
1286
1287 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1288 printf("... time enabled : %" PRI_lu64 "\n", read_event->time_enabled);
1289
1290 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1291 printf("... time running : %" PRI_lu64 "\n", read_event->time_running);
1292
1293 if (read_format & PERF_FORMAT_ID)
1294 printf("... id : %" PRI_lu64 "\n", read_event->id);
1295 }
1296
1297 static struct machine *machines__find_for_cpumode(struct machines *machines,
1298 union perf_event *event,
1299 struct perf_sample *sample)
1300 {
1301 struct machine *machine;
1302
1303 if (perf_guest &&
1304 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1305 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1306 u32 pid;
1307
1308 if (event->header.type == PERF_RECORD_MMAP
1309 || event->header.type == PERF_RECORD_MMAP2)
1310 pid = event->mmap.pid;
1311 else
1312 pid = sample->pid;
1313
1314 machine = machines__find(machines, pid);
1315 if (!machine)
1316 machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID);
1317 return machine;
1318 }
1319
1320 return &machines->host;
1321 }
1322
1323 static int deliver_sample_value(struct evlist *evlist,
1324 struct perf_tool *tool,
1325 union perf_event *event,
1326 struct perf_sample *sample,
1327 struct sample_read_value *v,
1328 struct machine *machine)
1329 {
1330 struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
1331 struct evsel *evsel;
1332
1333 if (sid) {
1334 sample->id = v->id;
1335 sample->period = v->value - sid->period;
1336 sid->period = v->value;
1337 }
1338
1339 if (!sid || sid->evsel == NULL) {
1340 ++evlist->stats.nr_unknown_id;
1341 return 0;
1342 }
1343
1344 /*
1345 * There's no reason to deliver sample
1346 * for zero period, bail out.
1347 */
1348 if (!sample->period)
1349 return 0;
1350
1351 evsel = container_of(sid->evsel, struct evsel, core);
1352 return tool->sample(tool, event, sample, evsel, machine);
1353 }
1354
1355 static int deliver_sample_group(struct evlist *evlist,
1356 struct perf_tool *tool,
1357 union perf_event *event,
1358 struct perf_sample *sample,
1359 struct machine *machine)
1360 {
1361 int ret = -EINVAL;
1362 u64 i;
1363
1364 for (i = 0; i < sample->read.group.nr; i++) {
1365 ret = deliver_sample_value(evlist, tool, event, sample,
1366 &sample->read.group.values[i],
1367 machine);
1368 if (ret)
1369 break;
1370 }
1371
1372 return ret;
1373 }
1374
1375 static int
1376 perf_evlist__deliver_sample(struct evlist *evlist,
1377 struct perf_tool *tool,
1378 union perf_event *event,
1379 struct perf_sample *sample,
1380 struct evsel *evsel,
1381 struct machine *machine)
1382 {
1383 /* We know evsel != NULL. */
1384 u64 sample_type = evsel->core.attr.sample_type;
1385 u64 read_format = evsel->core.attr.read_format;
1386
1387 /* Standard sample delivery. */
1388 if (!(sample_type & PERF_SAMPLE_READ))
1389 return tool->sample(tool, event, sample, evsel, machine);
1390
1391 /* For PERF_SAMPLE_READ we have either single or group mode. */
1392 if (read_format & PERF_FORMAT_GROUP)
1393 return deliver_sample_group(evlist, tool, event, sample,
1394 machine);
1395 else
1396 return deliver_sample_value(evlist, tool, event, sample,
1397 &sample->read.one, machine);
1398 }
1399
1400 static int machines__deliver_event(struct machines *machines,
1401 struct evlist *evlist,
1402 union perf_event *event,
1403 struct perf_sample *sample,
1404 struct perf_tool *tool, u64 file_offset)
1405 {
1406 struct evsel *evsel;
1407 struct machine *machine;
1408
1409 dump_event(evlist, event, file_offset, sample);
1410
1411 evsel = perf_evlist__id2evsel(evlist, sample->id);
1412
1413 machine = machines__find_for_cpumode(machines, event, sample);
1414
1415 switch (event->header.type) {
1416 case PERF_RECORD_SAMPLE:
1417 if (evsel == NULL) {
1418 ++evlist->stats.nr_unknown_id;
1419 return 0;
1420 }
1421 dump_sample(evsel, event, sample);
1422 if (machine == NULL) {
1423 ++evlist->stats.nr_unprocessable_samples;
1424 return 0;
1425 }
1426 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1427 case PERF_RECORD_MMAP:
1428 return tool->mmap(tool, event, sample, machine);
1429 case PERF_RECORD_MMAP2:
1430 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1431 ++evlist->stats.nr_proc_map_timeout;
1432 return tool->mmap2(tool, event, sample, machine);
1433 case PERF_RECORD_COMM:
1434 return tool->comm(tool, event, sample, machine);
1435 case PERF_RECORD_NAMESPACES:
1436 return tool->namespaces(tool, event, sample, machine);
1437 case PERF_RECORD_FORK:
1438 return tool->fork(tool, event, sample, machine);
1439 case PERF_RECORD_EXIT:
1440 return tool->exit(tool, event, sample, machine);
1441 case PERF_RECORD_LOST:
1442 if (tool->lost == perf_event__process_lost)
1443 evlist->stats.total_lost += event->lost.lost;
1444 return tool->lost(tool, event, sample, machine);
1445 case PERF_RECORD_LOST_SAMPLES:
1446 if (tool->lost_samples == perf_event__process_lost_samples)
1447 evlist->stats.total_lost_samples += event->lost_samples.lost;
1448 return tool->lost_samples(tool, event, sample, machine);
1449 case PERF_RECORD_READ:
1450 dump_read(evsel, event);
1451 return tool->read(tool, event, sample, evsel, machine);
1452 case PERF_RECORD_THROTTLE:
1453 return tool->throttle(tool, event, sample, machine);
1454 case PERF_RECORD_UNTHROTTLE:
1455 return tool->unthrottle(tool, event, sample, machine);
1456 case PERF_RECORD_AUX:
1457 if (tool->aux == perf_event__process_aux) {
1458 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED)
1459 evlist->stats.total_aux_lost += 1;
1460 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL)
1461 evlist->stats.total_aux_partial += 1;
1462 }
1463 return tool->aux(tool, event, sample, machine);
1464 case PERF_RECORD_ITRACE_START:
1465 return tool->itrace_start(tool, event, sample, machine);
1466 case PERF_RECORD_SWITCH:
1467 case PERF_RECORD_SWITCH_CPU_WIDE:
1468 return tool->context_switch(tool, event, sample, machine);
1469 case PERF_RECORD_KSYMBOL:
1470 return tool->ksymbol(tool, event, sample, machine);
1471 case PERF_RECORD_BPF_EVENT:
1472 return tool->bpf(tool, event, sample, machine);
1473 default:
1474 ++evlist->stats.nr_unknown_events;
1475 return -1;
1476 }
1477 }
1478
1479 static int perf_session__deliver_event(struct perf_session *session,
1480 union perf_event *event,
1481 struct perf_tool *tool,
1482 u64 file_offset)
1483 {
1484 struct perf_sample sample;
1485 int ret;
1486
1487 ret = perf_evlist__parse_sample(session->evlist, event, &sample);
1488 if (ret) {
1489 pr_err("Can't parse sample, err = %d\n", ret);
1490 return ret;
1491 }
1492
1493 ret = auxtrace__process_event(session, event, &sample, tool);
1494 if (ret < 0)
1495 return ret;
1496 if (ret > 0)
1497 return 0;
1498
1499 ret = machines__deliver_event(&session->machines, session->evlist,
1500 event, &sample, tool, file_offset);
1501
1502 if (dump_trace && sample.aux_sample.size)
1503 auxtrace__dump_auxtrace_sample(session, &sample);
1504
1505 return ret;
1506 }
1507
1508 static s64 perf_session__process_user_event(struct perf_session *session,
1509 union perf_event *event,
1510 u64 file_offset)
1511 {
1512 struct ordered_events *oe = &session->ordered_events;
1513 struct perf_tool *tool = session->tool;
1514 struct perf_sample sample = { .time = 0, };
1515 int fd = perf_data__fd(session->data);
1516 int err;
1517
1518 if (event->header.type != PERF_RECORD_COMPRESSED ||
1519 tool->compressed == perf_session__process_compressed_event_stub)
1520 dump_event(session->evlist, event, file_offset, &sample);
1521
1522 /* These events are processed right away */
1523 switch (event->header.type) {
1524 case PERF_RECORD_HEADER_ATTR:
1525 err = tool->attr(tool, event, &session->evlist);
1526 if (err == 0) {
1527 perf_session__set_id_hdr_size(session);
1528 perf_session__set_comm_exec(session);
1529 }
1530 return err;
1531 case PERF_RECORD_EVENT_UPDATE:
1532 return tool->event_update(tool, event, &session->evlist);
1533 case PERF_RECORD_HEADER_EVENT_TYPE:
1534 /*
1535 * Depreceated, but we need to handle it for sake
1536 * of old data files create in pipe mode.
1537 */
1538 return 0;
1539 case PERF_RECORD_HEADER_TRACING_DATA:
1540 /* setup for reading amidst mmap */
1541 lseek(fd, file_offset, SEEK_SET);
1542 return tool->tracing_data(session, event);
1543 case PERF_RECORD_HEADER_BUILD_ID:
1544 return tool->build_id(session, event);
1545 case PERF_RECORD_FINISHED_ROUND:
1546 return tool->finished_round(tool, event, oe);
1547 case PERF_RECORD_ID_INDEX:
1548 return tool->id_index(session, event);
1549 case PERF_RECORD_AUXTRACE_INFO:
1550 return tool->auxtrace_info(session, event);
1551 case PERF_RECORD_AUXTRACE:
1552 /* setup for reading amidst mmap */
1553 lseek(fd, file_offset + event->header.size, SEEK_SET);
1554 return tool->auxtrace(session, event);
1555 case PERF_RECORD_AUXTRACE_ERROR:
1556 perf_session__auxtrace_error_inc(session, event);
1557 return tool->auxtrace_error(session, event);
1558 case PERF_RECORD_THREAD_MAP:
1559 return tool->thread_map(session, event);
1560 case PERF_RECORD_CPU_MAP:
1561 return tool->cpu_map(session, event);
1562 case PERF_RECORD_STAT_CONFIG:
1563 return tool->stat_config(session, event);
1564 case PERF_RECORD_STAT:
1565 return tool->stat(session, event);
1566 case PERF_RECORD_STAT_ROUND:
1567 return tool->stat_round(session, event);
1568 case PERF_RECORD_TIME_CONV:
1569 session->time_conv = event->time_conv;
1570 return tool->time_conv(session, event);
1571 case PERF_RECORD_HEADER_FEATURE:
1572 return tool->feature(session, event);
1573 case PERF_RECORD_COMPRESSED:
1574 err = tool->compressed(session, event, file_offset);
1575 if (err)
1576 dump_event(session->evlist, event, file_offset, &sample);
1577 return err;
1578 default:
1579 return -EINVAL;
1580 }
1581 }
1582
1583 int perf_session__deliver_synth_event(struct perf_session *session,
1584 union perf_event *event,
1585 struct perf_sample *sample)
1586 {
1587 struct evlist *evlist = session->evlist;
1588 struct perf_tool *tool = session->tool;
1589
1590 events_stats__inc(&evlist->stats, event->header.type);
1591
1592 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1593 return perf_session__process_user_event(session, event, 0);
1594
1595 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0);
1596 }
1597
1598 static void event_swap(union perf_event *event, bool sample_id_all)
1599 {
1600 perf_event__swap_op swap;
1601
1602 swap = perf_event__swap_ops[event->header.type];
1603 if (swap)
1604 swap(event, sample_id_all);
1605 }
1606
1607 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1608 void *buf, size_t buf_sz,
1609 union perf_event **event_ptr,
1610 struct perf_sample *sample)
1611 {
1612 union perf_event *event;
1613 size_t hdr_sz, rest;
1614 int fd;
1615
1616 if (session->one_mmap && !session->header.needs_swap) {
1617 event = file_offset - session->one_mmap_offset +
1618 session->one_mmap_addr;
1619 goto out_parse_sample;
1620 }
1621
1622 if (perf_data__is_pipe(session->data))
1623 return -1;
1624
1625 fd = perf_data__fd(session->data);
1626 hdr_sz = sizeof(struct perf_event_header);
1627
1628 if (buf_sz < hdr_sz)
1629 return -1;
1630
1631 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1632 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1633 return -1;
1634
1635 event = (union perf_event *)buf;
1636
1637 if (session->header.needs_swap)
1638 perf_event_header__bswap(&event->header);
1639
1640 if (event->header.size < hdr_sz || event->header.size > buf_sz)
1641 return -1;
1642
1643 rest = event->header.size - hdr_sz;
1644
1645 if (readn(fd, buf, rest) != (ssize_t)rest)
1646 return -1;
1647
1648 if (session->header.needs_swap)
1649 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1650
1651 out_parse_sample:
1652
1653 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1654 perf_evlist__parse_sample(session->evlist, event, sample))
1655 return -1;
1656
1657 *event_ptr = event;
1658
1659 return 0;
1660 }
1661
1662 int perf_session__peek_events(struct perf_session *session, u64 offset,
1663 u64 size, peek_events_cb_t cb, void *data)
1664 {
1665 u64 max_offset = offset + size;
1666 char buf[PERF_SAMPLE_MAX_SIZE];
1667 union perf_event *event;
1668 int err;
1669
1670 do {
1671 err = perf_session__peek_event(session, offset, buf,
1672 PERF_SAMPLE_MAX_SIZE, &event,
1673 NULL);
1674 if (err)
1675 return err;
1676
1677 err = cb(session, event, offset, data);
1678 if (err)
1679 return err;
1680
1681 offset += event->header.size;
1682 if (event->header.type == PERF_RECORD_AUXTRACE)
1683 offset += event->auxtrace.size;
1684
1685 } while (offset < max_offset);
1686
1687 return err;
1688 }
1689
1690 static s64 perf_session__process_event(struct perf_session *session,
1691 union perf_event *event, u64 file_offset)
1692 {
1693 struct evlist *evlist = session->evlist;
1694 struct perf_tool *tool = session->tool;
1695 int ret;
1696
1697 if (session->header.needs_swap)
1698 event_swap(event, perf_evlist__sample_id_all(evlist));
1699
1700 if (event->header.type >= PERF_RECORD_HEADER_MAX)
1701 return -EINVAL;
1702
1703 events_stats__inc(&evlist->stats, event->header.type);
1704
1705 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1706 return perf_session__process_user_event(session, event, file_offset);
1707
1708 if (tool->ordered_events) {
1709 u64 timestamp = -1ULL;
1710
1711 ret = perf_evlist__parse_sample_timestamp(evlist, event, &timestamp);
1712 if (ret && ret != -1)
1713 return ret;
1714
1715 ret = perf_session__queue_event(session, event, timestamp, file_offset);
1716 if (ret != -ETIME)
1717 return ret;
1718 }
1719
1720 return perf_session__deliver_event(session, event, tool, file_offset);
1721 }
1722
1723 void perf_event_header__bswap(struct perf_event_header *hdr)
1724 {
1725 hdr->type = bswap_32(hdr->type);
1726 hdr->misc = bswap_16(hdr->misc);
1727 hdr->size = bswap_16(hdr->size);
1728 }
1729
1730 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1731 {
1732 return machine__findnew_thread(&session->machines.host, -1, pid);
1733 }
1734
1735 /*
1736 * Threads are identified by pid and tid, and the idle task has pid == tid == 0.
1737 * So here a single thread is created for that, but actually there is a separate
1738 * idle task per cpu, so there should be one 'struct thread' per cpu, but there
1739 * is only 1. That causes problems for some tools, requiring workarounds. For
1740 * example get_idle_thread() in builtin-sched.c, or thread_stack__per_cpu().
1741 */
1742 int perf_session__register_idle_thread(struct perf_session *session)
1743 {
1744 struct thread *thread;
1745 int err = 0;
1746
1747 thread = machine__findnew_thread(&session->machines.host, 0, 0);
1748 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1749 pr_err("problem inserting idle task.\n");
1750 err = -1;
1751 }
1752
1753 if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) {
1754 pr_err("problem inserting idle task.\n");
1755 err = -1;
1756 }
1757
1758 /* machine__findnew_thread() got the thread, so put it */
1759 thread__put(thread);
1760 return err;
1761 }
1762
1763 static void
1764 perf_session__warn_order(const struct perf_session *session)
1765 {
1766 const struct ordered_events *oe = &session->ordered_events;
1767 struct evsel *evsel;
1768 bool should_warn = true;
1769
1770 evlist__for_each_entry(session->evlist, evsel) {
1771 if (evsel->core.attr.write_backward)
1772 should_warn = false;
1773 }
1774
1775 if (!should_warn)
1776 return;
1777 if (oe->nr_unordered_events != 0)
1778 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1779 }
1780
1781 static void perf_session__warn_about_errors(const struct perf_session *session)
1782 {
1783 const struct events_stats *stats = &session->evlist->stats;
1784
1785 if (session->tool->lost == perf_event__process_lost &&
1786 stats->nr_events[PERF_RECORD_LOST] != 0) {
1787 ui__warning("Processed %d events and lost %d chunks!\n\n"
1788 "Check IO/CPU overload!\n\n",
1789 stats->nr_events[0],
1790 stats->nr_events[PERF_RECORD_LOST]);
1791 }
1792
1793 if (session->tool->lost_samples == perf_event__process_lost_samples) {
1794 double drop_rate;
1795
1796 drop_rate = (double)stats->total_lost_samples /
1797 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1798 if (drop_rate > 0.05) {
1799 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n",
1800 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1801 drop_rate * 100.0);
1802 }
1803 }
1804
1805 if (session->tool->aux == perf_event__process_aux &&
1806 stats->total_aux_lost != 0) {
1807 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1808 stats->total_aux_lost,
1809 stats->nr_events[PERF_RECORD_AUX]);
1810 }
1811
1812 if (session->tool->aux == perf_event__process_aux &&
1813 stats->total_aux_partial != 0) {
1814 bool vmm_exclusive = false;
1815
1816 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive",
1817 &vmm_exclusive);
1818
1819 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n"
1820 "Are you running a KVM guest in the background?%s\n\n",
1821 stats->total_aux_partial,
1822 stats->nr_events[PERF_RECORD_AUX],
1823 vmm_exclusive ?
1824 "\nReloading kvm_intel module with vmm_exclusive=0\n"
1825 "will reduce the gaps to only guest's timeslices." :
1826 "");
1827 }
1828
1829 if (stats->nr_unknown_events != 0) {
1830 ui__warning("Found %u unknown events!\n\n"
1831 "Is this an older tool processing a perf.data "
1832 "file generated by a more recent tool?\n\n"
1833 "If that is not the case, consider "
1834 "reporting to linux-kernel@vger.kernel.org.\n\n",
1835 stats->nr_unknown_events);
1836 }
1837
1838 if (stats->nr_unknown_id != 0) {
1839 ui__warning("%u samples with id not present in the header\n",
1840 stats->nr_unknown_id);
1841 }
1842
1843 if (stats->nr_invalid_chains != 0) {
1844 ui__warning("Found invalid callchains!\n\n"
1845 "%u out of %u events were discarded for this reason.\n\n"
1846 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1847 stats->nr_invalid_chains,
1848 stats->nr_events[PERF_RECORD_SAMPLE]);
1849 }
1850
1851 if (stats->nr_unprocessable_samples != 0) {
1852 ui__warning("%u unprocessable samples recorded.\n"
1853 "Do you have a KVM guest running and not using 'perf kvm'?\n",
1854 stats->nr_unprocessable_samples);
1855 }
1856
1857 perf_session__warn_order(session);
1858
1859 events_stats__auxtrace_error_warn(stats);
1860
1861 if (stats->nr_proc_map_timeout != 0) {
1862 ui__warning("%d map information files for pre-existing threads were\n"
1863 "not processed, if there are samples for addresses they\n"
1864 "will not be resolved, you may find out which are these\n"
1865 "threads by running with -v and redirecting the output\n"
1866 "to a file.\n"
1867 "The time limit to process proc map is too short?\n"
1868 "Increase it by --proc-map-timeout\n",
1869 stats->nr_proc_map_timeout);
1870 }
1871 }
1872
1873 static int perf_session__flush_thread_stack(struct thread *thread,
1874 void *p __maybe_unused)
1875 {
1876 return thread_stack__flush(thread);
1877 }
1878
1879 static int perf_session__flush_thread_stacks(struct perf_session *session)
1880 {
1881 return machines__for_each_thread(&session->machines,
1882 perf_session__flush_thread_stack,
1883 NULL);
1884 }
1885
1886 volatile int session_done;
1887
1888 static int __perf_session__process_decomp_events(struct perf_session *session);
1889
1890 static int __perf_session__process_pipe_events(struct perf_session *session)
1891 {
1892 struct ordered_events *oe = &session->ordered_events;
1893 struct perf_tool *tool = session->tool;
1894 int fd = perf_data__fd(session->data);
1895 union perf_event *event;
1896 uint32_t size, cur_size = 0;
1897 void *buf = NULL;
1898 s64 skip = 0;
1899 u64 head;
1900 ssize_t err;
1901 void *p;
1902
1903 perf_tool__fill_defaults(tool);
1904
1905 head = 0;
1906 cur_size = sizeof(union perf_event);
1907
1908 buf = malloc(cur_size);
1909 if (!buf)
1910 return -errno;
1911 ordered_events__set_copy_on_queue(oe, true);
1912 more:
1913 event = buf;
1914 err = readn(fd, event, sizeof(struct perf_event_header));
1915 if (err <= 0) {
1916 if (err == 0)
1917 goto done;
1918
1919 pr_err("failed to read event header\n");
1920 goto out_err;
1921 }
1922
1923 if (session->header.needs_swap)
1924 perf_event_header__bswap(&event->header);
1925
1926 size = event->header.size;
1927 if (size < sizeof(struct perf_event_header)) {
1928 pr_err("bad event header size\n");
1929 goto out_err;
1930 }
1931
1932 if (size > cur_size) {
1933 void *new = realloc(buf, size);
1934 if (!new) {
1935 pr_err("failed to allocate memory to read event\n");
1936 goto out_err;
1937 }
1938 buf = new;
1939 cur_size = size;
1940 event = buf;
1941 }
1942 p = event;
1943 p += sizeof(struct perf_event_header);
1944
1945 if (size - sizeof(struct perf_event_header)) {
1946 err = readn(fd, p, size - sizeof(struct perf_event_header));
1947 if (err <= 0) {
1948 if (err == 0) {
1949 pr_err("unexpected end of event stream\n");
1950 goto done;
1951 }
1952
1953 pr_err("failed to read event data\n");
1954 goto out_err;
1955 }
1956 }
1957
1958 if ((skip = perf_session__process_event(session, event, head)) < 0) {
1959 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1960 head, event->header.size, event->header.type);
1961 err = -EINVAL;
1962 goto out_err;
1963 }
1964
1965 head += size;
1966
1967 if (skip > 0)
1968 head += skip;
1969
1970 err = __perf_session__process_decomp_events(session);
1971 if (err)
1972 goto out_err;
1973
1974 if (!session_done())
1975 goto more;
1976 done:
1977 /* do the final flush for ordered samples */
1978 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1979 if (err)
1980 goto out_err;
1981 err = auxtrace__flush_events(session, tool);
1982 if (err)
1983 goto out_err;
1984 err = perf_session__flush_thread_stacks(session);
1985 out_err:
1986 free(buf);
1987 if (!tool->no_warn)
1988 perf_session__warn_about_errors(session);
1989 ordered_events__free(&session->ordered_events);
1990 auxtrace__free_events(session);
1991 return err;
1992 }
1993
1994 static union perf_event *
1995 prefetch_event(char *buf, u64 head, size_t mmap_size,
1996 bool needs_swap, union perf_event *error)
1997 {
1998 union perf_event *event;
1999
2000 /*
2001 * Ensure we have enough space remaining to read
2002 * the size of the event in the headers.
2003 */
2004 if (head + sizeof(event->header) > mmap_size)
2005 return NULL;
2006
2007 event = (union perf_event *)(buf + head);
2008 if (needs_swap)
2009 perf_event_header__bswap(&event->header);
2010
2011 if (head + event->header.size <= mmap_size)
2012 return event;
2013
2014 /* We're not fetching the event so swap back again */
2015 if (needs_swap)
2016 perf_event_header__bswap(&event->header);
2017
2018 pr_debug("%s: head=%#" PRIx64 " event->header_size=%#x, mmap_size=%#zx:"
2019 " fuzzed or compressed perf.data?\n",__func__, head, event->header.size, mmap_size);
2020
2021 return error;
2022 }
2023
2024 static union perf_event *
2025 fetch_mmaped_event(u64 head, size_t mmap_size, char *buf, bool needs_swap)
2026 {
2027 return prefetch_event(buf, head, mmap_size, needs_swap, ERR_PTR(-EINVAL));
2028 }
2029
2030 static union perf_event *
2031 fetch_decomp_event(u64 head, size_t mmap_size, char *buf, bool needs_swap)
2032 {
2033 return prefetch_event(buf, head, mmap_size, needs_swap, NULL);
2034 }
2035
2036 static int __perf_session__process_decomp_events(struct perf_session *session)
2037 {
2038 s64 skip;
2039 u64 size, file_pos = 0;
2040 struct decomp *decomp = session->decomp_last;
2041
2042 if (!decomp)
2043 return 0;
2044
2045 while (decomp->head < decomp->size && !session_done()) {
2046 union perf_event *event = fetch_decomp_event(decomp->head, decomp->size, decomp->data,
2047 session->header.needs_swap);
2048
2049 if (!event)
2050 break;
2051
2052 size = event->header.size;
2053
2054 if (size < sizeof(struct perf_event_header) ||
2055 (skip = perf_session__process_event(session, event, file_pos)) < 0) {
2056 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
2057 decomp->file_pos + decomp->head, event->header.size, event->header.type);
2058 return -EINVAL;
2059 }
2060
2061 if (skip)
2062 size += skip;
2063
2064 decomp->head += size;
2065 }
2066
2067 return 0;
2068 }
2069
2070 /*
2071 * On 64bit we can mmap the data file in one go. No need for tiny mmap
2072 * slices. On 32bit we use 32MB.
2073 */
2074 #if BITS_PER_LONG == 64
2075 #define MMAP_SIZE ULLONG_MAX
2076 #define NUM_MMAPS 1
2077 #else
2078 #define MMAP_SIZE (32 * 1024 * 1024ULL)
2079 #define NUM_MMAPS 128
2080 #endif
2081
2082 struct reader;
2083
2084 typedef s64 (*reader_cb_t)(struct perf_session *session,
2085 union perf_event *event,
2086 u64 file_offset);
2087
2088 struct reader {
2089 int fd;
2090 u64 data_size;
2091 u64 data_offset;
2092 reader_cb_t process;
2093 };
2094
2095 static int
2096 reader__process_events(struct reader *rd, struct perf_session *session,
2097 struct ui_progress *prog)
2098 {
2099 u64 data_size = rd->data_size;
2100 u64 head, page_offset, file_offset, file_pos, size;
2101 int err = 0, mmap_prot, mmap_flags, map_idx = 0;
2102 size_t mmap_size;
2103 char *buf, *mmaps[NUM_MMAPS];
2104 union perf_event *event;
2105 s64 skip;
2106
2107 page_offset = page_size * (rd->data_offset / page_size);
2108 file_offset = page_offset;
2109 head = rd->data_offset - page_offset;
2110
2111 ui_progress__init_size(prog, data_size, "Processing events...");
2112
2113 data_size += rd->data_offset;
2114
2115 mmap_size = MMAP_SIZE;
2116 if (mmap_size > data_size) {
2117 mmap_size = data_size;
2118 session->one_mmap = true;
2119 }
2120
2121 memset(mmaps, 0, sizeof(mmaps));
2122
2123 mmap_prot = PROT_READ;
2124 mmap_flags = MAP_SHARED;
2125
2126 if (session->header.needs_swap) {
2127 mmap_prot |= PROT_WRITE;
2128 mmap_flags = MAP_PRIVATE;
2129 }
2130 remap:
2131 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, rd->fd,
2132 file_offset);
2133 if (buf == MAP_FAILED) {
2134 pr_err("failed to mmap file\n");
2135 err = -errno;
2136 goto out;
2137 }
2138 mmaps[map_idx] = buf;
2139 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
2140 file_pos = file_offset + head;
2141 if (session->one_mmap) {
2142 session->one_mmap_addr = buf;
2143 session->one_mmap_offset = file_offset;
2144 }
2145
2146 more:
2147 event = fetch_mmaped_event(head, mmap_size, buf, session->header.needs_swap);
2148 if (IS_ERR(event))
2149 return PTR_ERR(event);
2150
2151 if (!event) {
2152 if (mmaps[map_idx]) {
2153 munmap(mmaps[map_idx], mmap_size);
2154 mmaps[map_idx] = NULL;
2155 }
2156
2157 page_offset = page_size * (head / page_size);
2158 file_offset += page_offset;
2159 head -= page_offset;
2160 goto remap;
2161 }
2162
2163 size = event->header.size;
2164
2165 skip = -EINVAL;
2166
2167 if (size < sizeof(struct perf_event_header) ||
2168 (skip = rd->process(session, event, file_pos)) < 0) {
2169 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n",
2170 file_offset + head, event->header.size,
2171 event->header.type, strerror(-skip));
2172 err = skip;
2173 goto out;
2174 }
2175
2176 if (skip)
2177 size += skip;
2178
2179 head += size;
2180 file_pos += size;
2181
2182 err = __perf_session__process_decomp_events(session);
2183 if (err)
2184 goto out;
2185
2186 ui_progress__update(prog, size);
2187
2188 if (session_done())
2189 goto out;
2190
2191 if (file_pos < data_size)
2192 goto more;
2193
2194 out:
2195 return err;
2196 }
2197
2198 static s64 process_simple(struct perf_session *session,
2199 union perf_event *event,
2200 u64 file_offset)
2201 {
2202 return perf_session__process_event(session, event, file_offset);
2203 }
2204
2205 static int __perf_session__process_events(struct perf_session *session)
2206 {
2207 struct reader rd = {
2208 .fd = perf_data__fd(session->data),
2209 .data_size = session->header.data_size,
2210 .data_offset = session->header.data_offset,
2211 .process = process_simple,
2212 };
2213 struct ordered_events *oe = &session->ordered_events;
2214 struct perf_tool *tool = session->tool;
2215 struct ui_progress prog;
2216 int err;
2217
2218 perf_tool__fill_defaults(tool);
2219
2220 if (rd.data_size == 0)
2221 return -1;
2222
2223 ui_progress__init_size(&prog, rd.data_size, "Processing events...");
2224
2225 err = reader__process_events(&rd, session, &prog);
2226 if (err)
2227 goto out_err;
2228 /* do the final flush for ordered samples */
2229 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
2230 if (err)
2231 goto out_err;
2232 err = auxtrace__flush_events(session, tool);
2233 if (err)
2234 goto out_err;
2235 err = perf_session__flush_thread_stacks(session);
2236 out_err:
2237 ui_progress__finish();
2238 if (!tool->no_warn)
2239 perf_session__warn_about_errors(session);
2240 /*
2241 * We may switching perf.data output, make ordered_events
2242 * reusable.
2243 */
2244 ordered_events__reinit(&session->ordered_events);
2245 auxtrace__free_events(session);
2246 session->one_mmap = false;
2247 return err;
2248 }
2249
2250 int perf_session__process_events(struct perf_session *session)
2251 {
2252 if (perf_session__register_idle_thread(session) < 0)
2253 return -ENOMEM;
2254
2255 if (perf_data__is_pipe(session->data))
2256 return __perf_session__process_pipe_events(session);
2257
2258 return __perf_session__process_events(session);
2259 }
2260
2261 bool perf_session__has_traces(struct perf_session *session, const char *msg)
2262 {
2263 struct evsel *evsel;
2264
2265 evlist__for_each_entry(session->evlist, evsel) {
2266 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT)
2267 return true;
2268 }
2269
2270 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
2271 return false;
2272 }
2273
2274 int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr)
2275 {
2276 char *bracket;
2277 struct ref_reloc_sym *ref;
2278 struct kmap *kmap;
2279
2280 ref = zalloc(sizeof(struct ref_reloc_sym));
2281 if (ref == NULL)
2282 return -ENOMEM;
2283
2284 ref->name = strdup(symbol_name);
2285 if (ref->name == NULL) {
2286 free(ref);
2287 return -ENOMEM;
2288 }
2289
2290 bracket = strchr(ref->name, ']');
2291 if (bracket)
2292 *bracket = '\0';
2293
2294 ref->addr = addr;
2295
2296 kmap = map__kmap(map);
2297 if (kmap)
2298 kmap->ref_reloc_sym = ref;
2299
2300 return 0;
2301 }
2302
2303 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
2304 {
2305 return machines__fprintf_dsos(&session->machines, fp);
2306 }
2307
2308 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
2309 bool (skip)(struct dso *dso, int parm), int parm)
2310 {
2311 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
2312 }
2313
2314 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
2315 {
2316 size_t ret;
2317 const char *msg = "";
2318
2319 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
2320 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
2321
2322 ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
2323
2324 ret += events_stats__fprintf(&session->evlist->stats, fp);
2325 return ret;
2326 }
2327
2328 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
2329 {
2330 /*
2331 * FIXME: Here we have to actually print all the machines in this
2332 * session, not just the host...
2333 */
2334 return machine__fprintf(&session->machines.host, fp);
2335 }
2336
2337 struct evsel *perf_session__find_first_evtype(struct perf_session *session,
2338 unsigned int type)
2339 {
2340 struct evsel *pos;
2341
2342 evlist__for_each_entry(session->evlist, pos) {
2343 if (pos->core.attr.type == type)
2344 return pos;
2345 }
2346 return NULL;
2347 }
2348
2349 int perf_session__cpu_bitmap(struct perf_session *session,
2350 const char *cpu_list, unsigned long *cpu_bitmap)
2351 {
2352 int i, err = -1;
2353 struct perf_cpu_map *map;
2354 int nr_cpus = min(session->header.env.nr_cpus_online, MAX_NR_CPUS);
2355
2356 for (i = 0; i < PERF_TYPE_MAX; ++i) {
2357 struct evsel *evsel;
2358
2359 evsel = perf_session__find_first_evtype(session, i);
2360 if (!evsel)
2361 continue;
2362
2363 if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CPU)) {
2364 pr_err("File does not contain CPU events. "
2365 "Remove -C option to proceed.\n");
2366 return -1;
2367 }
2368 }
2369
2370 map = perf_cpu_map__new(cpu_list);
2371 if (map == NULL) {
2372 pr_err("Invalid cpu_list\n");
2373 return -1;
2374 }
2375
2376 for (i = 0; i < map->nr; i++) {
2377 int cpu = map->map[i];
2378
2379 if (cpu >= nr_cpus) {
2380 pr_err("Requested CPU %d too large. "
2381 "Consider raising MAX_NR_CPUS\n", cpu);
2382 goto out_delete_map;
2383 }
2384
2385 set_bit(cpu, cpu_bitmap);
2386 }
2387
2388 err = 0;
2389
2390 out_delete_map:
2391 perf_cpu_map__put(map);
2392 return err;
2393 }
2394
2395 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
2396 bool full)
2397 {
2398 if (session == NULL || fp == NULL)
2399 return;
2400
2401 fprintf(fp, "# ========\n");
2402 perf_header__fprintf_info(session, fp, full);
2403 fprintf(fp, "# ========\n#\n");
2404 }
2405
2406 int perf_event__process_id_index(struct perf_session *session,
2407 union perf_event *event)
2408 {
2409 struct evlist *evlist = session->evlist;
2410 struct perf_record_id_index *ie = &event->id_index;
2411 size_t i, nr, max_nr;
2412
2413 max_nr = (ie->header.size - sizeof(struct perf_record_id_index)) /
2414 sizeof(struct id_index_entry);
2415 nr = ie->nr;
2416 if (nr > max_nr)
2417 return -EINVAL;
2418
2419 if (dump_trace)
2420 fprintf(stdout, " nr: %zu\n", nr);
2421
2422 for (i = 0; i < nr; i++) {
2423 struct id_index_entry *e = &ie->entries[i];
2424 struct perf_sample_id *sid;
2425
2426 if (dump_trace) {
2427 fprintf(stdout, " ... id: %"PRI_lu64, e->id);
2428 fprintf(stdout, " idx: %"PRI_lu64, e->idx);
2429 fprintf(stdout, " cpu: %"PRI_ld64, e->cpu);
2430 fprintf(stdout, " tid: %"PRI_ld64"\n", e->tid);
2431 }
2432
2433 sid = perf_evlist__id2sid(evlist, e->id);
2434 if (!sid)
2435 return -ENOENT;
2436 sid->idx = e->idx;
2437 sid->cpu = e->cpu;
2438 sid->tid = e->tid;
2439 }
2440 return 0;
2441 }
Linux with added FPC-III support