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1// SPDX-License-Identifier: GPL-2.0
2#include <errno.h>
3#include <signal.h>
4#include <inttypes.h>
5#include <linux/err.h>
6#include <linux/kernel.h>
7#include <linux/zalloc.h>
8#include <api/fs/fs.h>
9
10#include <byteswap.h>
11#include <unistd.h>
12#include <sys/types.h>
13#include <sys/mman.h>
14#include <perf/cpumap.h>
15
16#include "map_symbol.h"
17#include "branch.h"
18#include "debug.h"
19#include "env.h"
20#include "evlist.h"
21#include "evsel.h"
22#include "memswap.h"
23#include "map.h"
24#include "symbol.h"
25#include "session.h"
26#include "tool.h"
27#include "perf_regs.h"
28#include "asm/bug.h"
29#include "auxtrace.h"
30#include "thread.h"
31#include "thread-stack.h"
32#include "sample-raw.h"
33#include "stat.h"
34#include "tsc.h"
35#include "ui/progress.h"
36#include "../perf.h"
37#include "arch/common.h"
38#include "units.h"
39#include <internal/lib.h>
40
41#ifdef HAVE_ZSTD_SUPPORT
42static int perf_session__process_compressed_event(struct perf_session *session,
43 union perf_event *event, u64 file_offset,
44 const char *file_path)
45{
46 void *src;
47 size_t decomp_size, src_size;
48 u64 decomp_last_rem = 0;
49 size_t mmap_len, decomp_len = session->header.env.comp_mmap_len;
50 struct decomp *decomp, *decomp_last = session->active_decomp->decomp_last;
51
52 if (decomp_last) {
53 decomp_last_rem = decomp_last->size - decomp_last->head;
54 decomp_len += decomp_last_rem;
55 }
56
57 mmap_len = sizeof(struct decomp) + decomp_len;
58 decomp = mmap(NULL, mmap_len, PROT_READ|PROT_WRITE,
59 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
60 if (decomp == MAP_FAILED) {
61 pr_err("Couldn't allocate memory for decompression\n");
62 return -1;
63 }
64
65 decomp->file_pos = file_offset;
66 decomp->file_path = file_path;
67 decomp->mmap_len = mmap_len;
68 decomp->head = 0;
69
70 if (decomp_last_rem) {
71 memcpy(decomp->data, &(decomp_last->data[decomp_last->head]), decomp_last_rem);
72 decomp->size = decomp_last_rem;
73 }
74
75 src = (void *)event + sizeof(struct perf_record_compressed);
76 src_size = event->pack.header.size - sizeof(struct perf_record_compressed);
77
78 decomp_size = zstd_decompress_stream(session->active_decomp->zstd_decomp, src, src_size,
79 &(decomp->data[decomp_last_rem]), decomp_len - decomp_last_rem);
80 if (!decomp_size) {
81 munmap(decomp, mmap_len);
82 pr_err("Couldn't decompress data\n");
83 return -1;
84 }
85
86 decomp->size += decomp_size;
87
88 if (session->active_decomp->decomp == NULL)
89 session->active_decomp->decomp = decomp;
90 else
91 session->active_decomp->decomp_last->next = decomp;
92
93 session->active_decomp->decomp_last = decomp;
94
95 pr_debug("decomp (B): %zd to %zd\n", src_size, decomp_size);
96
97 return 0;
98}
99#else /* !HAVE_ZSTD_SUPPORT */
100#define perf_session__process_compressed_event perf_session__process_compressed_event_stub
101#endif
102
103static int perf_session__deliver_event(struct perf_session *session,
104 union perf_event *event,
105 struct perf_tool *tool,
106 u64 file_offset,
107 const char *file_path);
108
109static int perf_session__open(struct perf_session *session, int repipe_fd)
110{
111 struct perf_data *data = session->data;
112
113 if (perf_session__read_header(session, repipe_fd) < 0) {
114 pr_err("incompatible file format (rerun with -v to learn more)\n");
115 return -1;
116 }
117
118 if (perf_data__is_pipe(data))
119 return 0;
120
121 if (perf_header__has_feat(&session->header, HEADER_STAT))
122 return 0;
123
124 if (!evlist__valid_sample_type(session->evlist)) {
125 pr_err("non matching sample_type\n");
126 return -1;
127 }
128
129 if (!evlist__valid_sample_id_all(session->evlist)) {
130 pr_err("non matching sample_id_all\n");
131 return -1;
132 }
133
134 if (!evlist__valid_read_format(session->evlist)) {
135 pr_err("non matching read_format\n");
136 return -1;
137 }
138
139 return 0;
140}
141
142void perf_session__set_id_hdr_size(struct perf_session *session)
143{
144 u16 id_hdr_size = evlist__id_hdr_size(session->evlist);
145
146 machines__set_id_hdr_size(&session->machines, id_hdr_size);
147}
148
149int perf_session__create_kernel_maps(struct perf_session *session)
150{
151 int ret = machine__create_kernel_maps(&session->machines.host);
152
153 if (ret >= 0)
154 ret = machines__create_guest_kernel_maps(&session->machines);
155 return ret;
156}
157
158static void perf_session__destroy_kernel_maps(struct perf_session *session)
159{
160 machines__destroy_kernel_maps(&session->machines);
161}
162
163static bool perf_session__has_comm_exec(struct perf_session *session)
164{
165 struct evsel *evsel;
166
167 evlist__for_each_entry(session->evlist, evsel) {
168 if (evsel->core.attr.comm_exec)
169 return true;
170 }
171
172 return false;
173}
174
175static void perf_session__set_comm_exec(struct perf_session *session)
176{
177 bool comm_exec = perf_session__has_comm_exec(session);
178
179 machines__set_comm_exec(&session->machines, comm_exec);
180}
181
182static int ordered_events__deliver_event(struct ordered_events *oe,
183 struct ordered_event *event)
184{
185 struct perf_session *session = container_of(oe, struct perf_session,
186 ordered_events);
187
188 return perf_session__deliver_event(session, event->event,
189 session->tool, event->file_offset,
190 event->file_path);
191}
192
193struct perf_session *__perf_session__new(struct perf_data *data,
194 bool repipe, int repipe_fd,
195 struct perf_tool *tool)
196{
197 int ret = -ENOMEM;
198 struct perf_session *session = zalloc(sizeof(*session));
199
200 if (!session)
201 goto out;
202
203 session->repipe = repipe;
204 session->tool = tool;
205 session->decomp_data.zstd_decomp = &session->zstd_data;
206 session->active_decomp = &session->decomp_data;
207 INIT_LIST_HEAD(&session->auxtrace_index);
208 machines__init(&session->machines);
209 ordered_events__init(&session->ordered_events,
210 ordered_events__deliver_event, NULL);
211
212 perf_env__init(&session->header.env);
213 if (data) {
214 ret = perf_data__open(data);
215 if (ret < 0)
216 goto out_delete;
217
218 session->data = data;
219
220 if (perf_data__is_read(data)) {
221 ret = perf_session__open(session, repipe_fd);
222 if (ret < 0)
223 goto out_delete;
224
225 /*
226 * set session attributes that are present in perf.data
227 * but not in pipe-mode.
228 */
229 if (!data->is_pipe) {
230 perf_session__set_id_hdr_size(session);
231 perf_session__set_comm_exec(session);
232 }
233
234 evlist__init_trace_event_sample_raw(session->evlist);
235
236 /* Open the directory data. */
237 if (data->is_dir) {
238 ret = perf_data__open_dir(data);
239 if (ret)
240 goto out_delete;
241 }
242
243 if (!symbol_conf.kallsyms_name &&
244 !symbol_conf.vmlinux_name)
245 symbol_conf.kallsyms_name = perf_data__kallsyms_name(data);
246 }
247 } else {
248 session->machines.host.env = &perf_env;
249 }
250
251 session->machines.host.single_address_space =
252 perf_env__single_address_space(session->machines.host.env);
253
254 if (!data || perf_data__is_write(data)) {
255 /*
256 * In O_RDONLY mode this will be performed when reading the
257 * kernel MMAP event, in perf_event__process_mmap().
258 */
259 if (perf_session__create_kernel_maps(session) < 0)
260 pr_warning("Cannot read kernel map\n");
261 }
262
263 /*
264 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is
265 * processed, so evlist__sample_id_all is not meaningful here.
266 */
267 if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps &&
268 tool->ordered_events && !evlist__sample_id_all(session->evlist)) {
269 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
270 tool->ordered_events = false;
271 }
272
273 return session;
274
275 out_delete:
276 perf_session__delete(session);
277 out:
278 return ERR_PTR(ret);
279}
280
281static void perf_session__delete_threads(struct perf_session *session)
282{
283 machine__delete_threads(&session->machines.host);
284}
285
286static void perf_decomp__release_events(struct decomp *next)
287{
288 struct decomp *decomp;
289 size_t mmap_len;
290
291 do {
292 decomp = next;
293 if (decomp == NULL)
294 break;
295 next = decomp->next;
296 mmap_len = decomp->mmap_len;
297 munmap(decomp, mmap_len);
298 } while (1);
299}
300
301void perf_session__delete(struct perf_session *session)
302{
303 if (session == NULL)
304 return;
305 auxtrace__free(session);
306 auxtrace_index__free(&session->auxtrace_index);
307 perf_session__destroy_kernel_maps(session);
308 perf_session__delete_threads(session);
309 perf_decomp__release_events(session->decomp_data.decomp);
310 perf_env__exit(&session->header.env);
311 machines__exit(&session->machines);
312 if (session->data) {
313 if (perf_data__is_read(session->data))
314 evlist__delete(session->evlist);
315 perf_data__close(session->data);
316 }
317#ifdef HAVE_LIBTRACEEVENT
318 trace_event__cleanup(&session->tevent);
319#endif
320 free(session);
321}
322
323static int process_event_synth_tracing_data_stub(struct perf_session *session
324 __maybe_unused,
325 union perf_event *event
326 __maybe_unused)
327{
328 dump_printf(": unhandled!\n");
329 return 0;
330}
331
332static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
333 union perf_event *event __maybe_unused,
334 struct evlist **pevlist
335 __maybe_unused)
336{
337 dump_printf(": unhandled!\n");
338 return 0;
339}
340
341static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused,
342 union perf_event *event __maybe_unused,
343 struct evlist **pevlist
344 __maybe_unused)
345{
346 if (dump_trace)
347 perf_event__fprintf_event_update(event, stdout);
348
349 dump_printf(": unhandled!\n");
350 return 0;
351}
352
353static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
354 union perf_event *event __maybe_unused,
355 struct perf_sample *sample __maybe_unused,
356 struct evsel *evsel __maybe_unused,
357 struct machine *machine __maybe_unused)
358{
359 dump_printf(": unhandled!\n");
360 return 0;
361}
362
363static int process_event_stub(struct perf_tool *tool __maybe_unused,
364 union perf_event *event __maybe_unused,
365 struct perf_sample *sample __maybe_unused,
366 struct machine *machine __maybe_unused)
367{
368 dump_printf(": unhandled!\n");
369 return 0;
370}
371
372static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
373 union perf_event *event __maybe_unused,
374 struct ordered_events *oe __maybe_unused)
375{
376 dump_printf(": unhandled!\n");
377 return 0;
378}
379
380static int skipn(int fd, off_t n)
381{
382 char buf[4096];
383 ssize_t ret;
384
385 while (n > 0) {
386 ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
387 if (ret <= 0)
388 return ret;
389 n -= ret;
390 }
391
392 return 0;
393}
394
395static s64 process_event_auxtrace_stub(struct perf_session *session __maybe_unused,
396 union perf_event *event)
397{
398 dump_printf(": unhandled!\n");
399 if (perf_data__is_pipe(session->data))
400 skipn(perf_data__fd(session->data), event->auxtrace.size);
401 return event->auxtrace.size;
402}
403
404static int process_event_op2_stub(struct perf_session *session __maybe_unused,
405 union perf_event *event __maybe_unused)
406{
407 dump_printf(": unhandled!\n");
408 return 0;
409}
410
411
412static
413int process_event_thread_map_stub(struct perf_session *session __maybe_unused,
414 union perf_event *event __maybe_unused)
415{
416 if (dump_trace)
417 perf_event__fprintf_thread_map(event, stdout);
418
419 dump_printf(": unhandled!\n");
420 return 0;
421}
422
423static
424int process_event_cpu_map_stub(struct perf_session *session __maybe_unused,
425 union perf_event *event __maybe_unused)
426{
427 if (dump_trace)
428 perf_event__fprintf_cpu_map(event, stdout);
429
430 dump_printf(": unhandled!\n");
431 return 0;
432}
433
434static
435int process_event_stat_config_stub(struct perf_session *session __maybe_unused,
436 union perf_event *event __maybe_unused)
437{
438 if (dump_trace)
439 perf_event__fprintf_stat_config(event, stdout);
440
441 dump_printf(": unhandled!\n");
442 return 0;
443}
444
445static int process_stat_stub(struct perf_session *perf_session __maybe_unused,
446 union perf_event *event)
447{
448 if (dump_trace)
449 perf_event__fprintf_stat(event, stdout);
450
451 dump_printf(": unhandled!\n");
452 return 0;
453}
454
455static int process_stat_round_stub(struct perf_session *perf_session __maybe_unused,
456 union perf_event *event)
457{
458 if (dump_trace)
459 perf_event__fprintf_stat_round(event, stdout);
460
461 dump_printf(": unhandled!\n");
462 return 0;
463}
464
465static int process_event_time_conv_stub(struct perf_session *perf_session __maybe_unused,
466 union perf_event *event)
467{
468 if (dump_trace)
469 perf_event__fprintf_time_conv(event, stdout);
470
471 dump_printf(": unhandled!\n");
472 return 0;
473}
474
475static int perf_session__process_compressed_event_stub(struct perf_session *session __maybe_unused,
476 union perf_event *event __maybe_unused,
477 u64 file_offset __maybe_unused,
478 const char *file_path __maybe_unused)
479{
480 dump_printf(": unhandled!\n");
481 return 0;
482}
483
484void perf_tool__fill_defaults(struct perf_tool *tool)
485{
486 if (tool->sample == NULL)
487 tool->sample = process_event_sample_stub;
488 if (tool->mmap == NULL)
489 tool->mmap = process_event_stub;
490 if (tool->mmap2 == NULL)
491 tool->mmap2 = process_event_stub;
492 if (tool->comm == NULL)
493 tool->comm = process_event_stub;
494 if (tool->namespaces == NULL)
495 tool->namespaces = process_event_stub;
496 if (tool->cgroup == NULL)
497 tool->cgroup = process_event_stub;
498 if (tool->fork == NULL)
499 tool->fork = process_event_stub;
500 if (tool->exit == NULL)
501 tool->exit = process_event_stub;
502 if (tool->lost == NULL)
503 tool->lost = perf_event__process_lost;
504 if (tool->lost_samples == NULL)
505 tool->lost_samples = perf_event__process_lost_samples;
506 if (tool->aux == NULL)
507 tool->aux = perf_event__process_aux;
508 if (tool->itrace_start == NULL)
509 tool->itrace_start = perf_event__process_itrace_start;
510 if (tool->context_switch == NULL)
511 tool->context_switch = perf_event__process_switch;
512 if (tool->ksymbol == NULL)
513 tool->ksymbol = perf_event__process_ksymbol;
514 if (tool->bpf == NULL)
515 tool->bpf = perf_event__process_bpf;
516 if (tool->text_poke == NULL)
517 tool->text_poke = perf_event__process_text_poke;
518 if (tool->aux_output_hw_id == NULL)
519 tool->aux_output_hw_id = perf_event__process_aux_output_hw_id;
520 if (tool->read == NULL)
521 tool->read = process_event_sample_stub;
522 if (tool->throttle == NULL)
523 tool->throttle = process_event_stub;
524 if (tool->unthrottle == NULL)
525 tool->unthrottle = process_event_stub;
526 if (tool->attr == NULL)
527 tool->attr = process_event_synth_attr_stub;
528 if (tool->event_update == NULL)
529 tool->event_update = process_event_synth_event_update_stub;
530 if (tool->tracing_data == NULL)
531 tool->tracing_data = process_event_synth_tracing_data_stub;
532 if (tool->build_id == NULL)
533 tool->build_id = process_event_op2_stub;
534 if (tool->finished_round == NULL) {
535 if (tool->ordered_events)
536 tool->finished_round = perf_event__process_finished_round;
537 else
538 tool->finished_round = process_finished_round_stub;
539 }
540 if (tool->id_index == NULL)
541 tool->id_index = process_event_op2_stub;
542 if (tool->auxtrace_info == NULL)
543 tool->auxtrace_info = process_event_op2_stub;
544 if (tool->auxtrace == NULL)
545 tool->auxtrace = process_event_auxtrace_stub;
546 if (tool->auxtrace_error == NULL)
547 tool->auxtrace_error = process_event_op2_stub;
548 if (tool->thread_map == NULL)
549 tool->thread_map = process_event_thread_map_stub;
550 if (tool->cpu_map == NULL)
551 tool->cpu_map = process_event_cpu_map_stub;
552 if (tool->stat_config == NULL)
553 tool->stat_config = process_event_stat_config_stub;
554 if (tool->stat == NULL)
555 tool->stat = process_stat_stub;
556 if (tool->stat_round == NULL)
557 tool->stat_round = process_stat_round_stub;
558 if (tool->time_conv == NULL)
559 tool->time_conv = process_event_time_conv_stub;
560 if (tool->feature == NULL)
561 tool->feature = process_event_op2_stub;
562 if (tool->compressed == NULL)
563 tool->compressed = perf_session__process_compressed_event;
564 if (tool->finished_init == NULL)
565 tool->finished_init = process_event_op2_stub;
566}
567
568static void swap_sample_id_all(union perf_event *event, void *data)
569{
570 void *end = (void *) event + event->header.size;
571 int size = end - data;
572
573 BUG_ON(size % sizeof(u64));
574 mem_bswap_64(data, size);
575}
576
577static void perf_event__all64_swap(union perf_event *event,
578 bool sample_id_all __maybe_unused)
579{
580 struct perf_event_header *hdr = &event->header;
581 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
582}
583
584static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
585{
586 event->comm.pid = bswap_32(event->comm.pid);
587 event->comm.tid = bswap_32(event->comm.tid);
588
589 if (sample_id_all) {
590 void *data = &event->comm.comm;
591
592 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
593 swap_sample_id_all(event, data);
594 }
595}
596
597static void perf_event__mmap_swap(union perf_event *event,
598 bool sample_id_all)
599{
600 event->mmap.pid = bswap_32(event->mmap.pid);
601 event->mmap.tid = bswap_32(event->mmap.tid);
602 event->mmap.start = bswap_64(event->mmap.start);
603 event->mmap.len = bswap_64(event->mmap.len);
604 event->mmap.pgoff = bswap_64(event->mmap.pgoff);
605
606 if (sample_id_all) {
607 void *data = &event->mmap.filename;
608
609 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
610 swap_sample_id_all(event, data);
611 }
612}
613
614static void perf_event__mmap2_swap(union perf_event *event,
615 bool sample_id_all)
616{
617 event->mmap2.pid = bswap_32(event->mmap2.pid);
618 event->mmap2.tid = bswap_32(event->mmap2.tid);
619 event->mmap2.start = bswap_64(event->mmap2.start);
620 event->mmap2.len = bswap_64(event->mmap2.len);
621 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
622
623 if (!(event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID)) {
624 event->mmap2.maj = bswap_32(event->mmap2.maj);
625 event->mmap2.min = bswap_32(event->mmap2.min);
626 event->mmap2.ino = bswap_64(event->mmap2.ino);
627 event->mmap2.ino_generation = bswap_64(event->mmap2.ino_generation);
628 }
629
630 if (sample_id_all) {
631 void *data = &event->mmap2.filename;
632
633 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
634 swap_sample_id_all(event, data);
635 }
636}
637static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
638{
639 event->fork.pid = bswap_32(event->fork.pid);
640 event->fork.tid = bswap_32(event->fork.tid);
641 event->fork.ppid = bswap_32(event->fork.ppid);
642 event->fork.ptid = bswap_32(event->fork.ptid);
643 event->fork.time = bswap_64(event->fork.time);
644
645 if (sample_id_all)
646 swap_sample_id_all(event, &event->fork + 1);
647}
648
649static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
650{
651 event->read.pid = bswap_32(event->read.pid);
652 event->read.tid = bswap_32(event->read.tid);
653 event->read.value = bswap_64(event->read.value);
654 event->read.time_enabled = bswap_64(event->read.time_enabled);
655 event->read.time_running = bswap_64(event->read.time_running);
656 event->read.id = bswap_64(event->read.id);
657
658 if (sample_id_all)
659 swap_sample_id_all(event, &event->read + 1);
660}
661
662static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
663{
664 event->aux.aux_offset = bswap_64(event->aux.aux_offset);
665 event->aux.aux_size = bswap_64(event->aux.aux_size);
666 event->aux.flags = bswap_64(event->aux.flags);
667
668 if (sample_id_all)
669 swap_sample_id_all(event, &event->aux + 1);
670}
671
672static void perf_event__itrace_start_swap(union perf_event *event,
673 bool sample_id_all)
674{
675 event->itrace_start.pid = bswap_32(event->itrace_start.pid);
676 event->itrace_start.tid = bswap_32(event->itrace_start.tid);
677
678 if (sample_id_all)
679 swap_sample_id_all(event, &event->itrace_start + 1);
680}
681
682static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
683{
684 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
685 event->context_switch.next_prev_pid =
686 bswap_32(event->context_switch.next_prev_pid);
687 event->context_switch.next_prev_tid =
688 bswap_32(event->context_switch.next_prev_tid);
689 }
690
691 if (sample_id_all)
692 swap_sample_id_all(event, &event->context_switch + 1);
693}
694
695static void perf_event__text_poke_swap(union perf_event *event, bool sample_id_all)
696{
697 event->text_poke.addr = bswap_64(event->text_poke.addr);
698 event->text_poke.old_len = bswap_16(event->text_poke.old_len);
699 event->text_poke.new_len = bswap_16(event->text_poke.new_len);
700
701 if (sample_id_all) {
702 size_t len = sizeof(event->text_poke.old_len) +
703 sizeof(event->text_poke.new_len) +
704 event->text_poke.old_len +
705 event->text_poke.new_len;
706 void *data = &event->text_poke.old_len;
707
708 data += PERF_ALIGN(len, sizeof(u64));
709 swap_sample_id_all(event, data);
710 }
711}
712
713static void perf_event__throttle_swap(union perf_event *event,
714 bool sample_id_all)
715{
716 event->throttle.time = bswap_64(event->throttle.time);
717 event->throttle.id = bswap_64(event->throttle.id);
718 event->throttle.stream_id = bswap_64(event->throttle.stream_id);
719
720 if (sample_id_all)
721 swap_sample_id_all(event, &event->throttle + 1);
722}
723
724static void perf_event__namespaces_swap(union perf_event *event,
725 bool sample_id_all)
726{
727 u64 i;
728
729 event->namespaces.pid = bswap_32(event->namespaces.pid);
730 event->namespaces.tid = bswap_32(event->namespaces.tid);
731 event->namespaces.nr_namespaces = bswap_64(event->namespaces.nr_namespaces);
732
733 for (i = 0; i < event->namespaces.nr_namespaces; i++) {
734 struct perf_ns_link_info *ns = &event->namespaces.link_info[i];
735
736 ns->dev = bswap_64(ns->dev);
737 ns->ino = bswap_64(ns->ino);
738 }
739
740 if (sample_id_all)
741 swap_sample_id_all(event, &event->namespaces.link_info[i]);
742}
743
744static void perf_event__cgroup_swap(union perf_event *event, bool sample_id_all)
745{
746 event->cgroup.id = bswap_64(event->cgroup.id);
747
748 if (sample_id_all) {
749 void *data = &event->cgroup.path;
750
751 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
752 swap_sample_id_all(event, data);
753 }
754}
755
756static u8 revbyte(u8 b)
757{
758 int rev = (b >> 4) | ((b & 0xf) << 4);
759 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
760 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
761 return (u8) rev;
762}
763
764/*
765 * XXX this is hack in attempt to carry flags bitfield
766 * through endian village. ABI says:
767 *
768 * Bit-fields are allocated from right to left (least to most significant)
769 * on little-endian implementations and from left to right (most to least
770 * significant) on big-endian implementations.
771 *
772 * The above seems to be byte specific, so we need to reverse each
773 * byte of the bitfield. 'Internet' also says this might be implementation
774 * specific and we probably need proper fix and carry perf_event_attr
775 * bitfield flags in separate data file FEAT_ section. Thought this seems
776 * to work for now.
777 */
778static void swap_bitfield(u8 *p, unsigned len)
779{
780 unsigned i;
781
782 for (i = 0; i < len; i++) {
783 *p = revbyte(*p);
784 p++;
785 }
786}
787
788/* exported for swapping attributes in file header */
789void perf_event__attr_swap(struct perf_event_attr *attr)
790{
791 attr->type = bswap_32(attr->type);
792 attr->size = bswap_32(attr->size);
793
794#define bswap_safe(f, n) \
795 (attr->size > (offsetof(struct perf_event_attr, f) + \
796 sizeof(attr->f) * (n)))
797#define bswap_field(f, sz) \
798do { \
799 if (bswap_safe(f, 0)) \
800 attr->f = bswap_##sz(attr->f); \
801} while(0)
802#define bswap_field_16(f) bswap_field(f, 16)
803#define bswap_field_32(f) bswap_field(f, 32)
804#define bswap_field_64(f) bswap_field(f, 64)
805
806 bswap_field_64(config);
807 bswap_field_64(sample_period);
808 bswap_field_64(sample_type);
809 bswap_field_64(read_format);
810 bswap_field_32(wakeup_events);
811 bswap_field_32(bp_type);
812 bswap_field_64(bp_addr);
813 bswap_field_64(bp_len);
814 bswap_field_64(branch_sample_type);
815 bswap_field_64(sample_regs_user);
816 bswap_field_32(sample_stack_user);
817 bswap_field_32(aux_watermark);
818 bswap_field_16(sample_max_stack);
819 bswap_field_32(aux_sample_size);
820
821 /*
822 * After read_format are bitfields. Check read_format because
823 * we are unable to use offsetof on bitfield.
824 */
825 if (bswap_safe(read_format, 1))
826 swap_bitfield((u8 *) (&attr->read_format + 1),
827 sizeof(u64));
828#undef bswap_field_64
829#undef bswap_field_32
830#undef bswap_field
831#undef bswap_safe
832}
833
834static void perf_event__hdr_attr_swap(union perf_event *event,
835 bool sample_id_all __maybe_unused)
836{
837 size_t size;
838
839 perf_event__attr_swap(&event->attr.attr);
840
841 size = event->header.size;
842 size -= (void *)&event->attr.id - (void *)event;
843 mem_bswap_64(event->attr.id, size);
844}
845
846static void perf_event__event_update_swap(union perf_event *event,
847 bool sample_id_all __maybe_unused)
848{
849 event->event_update.type = bswap_64(event->event_update.type);
850 event->event_update.id = bswap_64(event->event_update.id);
851}
852
853static void perf_event__event_type_swap(union perf_event *event,
854 bool sample_id_all __maybe_unused)
855{
856 event->event_type.event_type.event_id =
857 bswap_64(event->event_type.event_type.event_id);
858}
859
860static void perf_event__tracing_data_swap(union perf_event *event,
861 bool sample_id_all __maybe_unused)
862{
863 event->tracing_data.size = bswap_32(event->tracing_data.size);
864}
865
866static void perf_event__auxtrace_info_swap(union perf_event *event,
867 bool sample_id_all __maybe_unused)
868{
869 size_t size;
870
871 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
872
873 size = event->header.size;
874 size -= (void *)&event->auxtrace_info.priv - (void *)event;
875 mem_bswap_64(event->auxtrace_info.priv, size);
876}
877
878static void perf_event__auxtrace_swap(union perf_event *event,
879 bool sample_id_all __maybe_unused)
880{
881 event->auxtrace.size = bswap_64(event->auxtrace.size);
882 event->auxtrace.offset = bswap_64(event->auxtrace.offset);
883 event->auxtrace.reference = bswap_64(event->auxtrace.reference);
884 event->auxtrace.idx = bswap_32(event->auxtrace.idx);
885 event->auxtrace.tid = bswap_32(event->auxtrace.tid);
886 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu);
887}
888
889static void perf_event__auxtrace_error_swap(union perf_event *event,
890 bool sample_id_all __maybe_unused)
891{
892 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
893 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
894 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu);
895 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid);
896 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid);
897 event->auxtrace_error.fmt = bswap_32(event->auxtrace_error.fmt);
898 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip);
899 if (event->auxtrace_error.fmt)
900 event->auxtrace_error.time = bswap_64(event->auxtrace_error.time);
901 if (event->auxtrace_error.fmt >= 2) {
902 event->auxtrace_error.machine_pid = bswap_32(event->auxtrace_error.machine_pid);
903 event->auxtrace_error.vcpu = bswap_32(event->auxtrace_error.vcpu);
904 }
905}
906
907static void perf_event__thread_map_swap(union perf_event *event,
908 bool sample_id_all __maybe_unused)
909{
910 unsigned i;
911
912 event->thread_map.nr = bswap_64(event->thread_map.nr);
913
914 for (i = 0; i < event->thread_map.nr; i++)
915 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
916}
917
918static void perf_event__cpu_map_swap(union perf_event *event,
919 bool sample_id_all __maybe_unused)
920{
921 struct perf_record_cpu_map_data *data = &event->cpu_map.data;
922
923 data->type = bswap_16(data->type);
924
925 switch (data->type) {
926 case PERF_CPU_MAP__CPUS:
927 data->cpus_data.nr = bswap_16(data->cpus_data.nr);
928
929 for (unsigned i = 0; i < data->cpus_data.nr; i++)
930 data->cpus_data.cpu[i] = bswap_16(data->cpus_data.cpu[i]);
931 break;
932 case PERF_CPU_MAP__MASK:
933 data->mask32_data.long_size = bswap_16(data->mask32_data.long_size);
934
935 switch (data->mask32_data.long_size) {
936 case 4:
937 data->mask32_data.nr = bswap_16(data->mask32_data.nr);
938 for (unsigned i = 0; i < data->mask32_data.nr; i++)
939 data->mask32_data.mask[i] = bswap_32(data->mask32_data.mask[i]);
940 break;
941 case 8:
942 data->mask64_data.nr = bswap_16(data->mask64_data.nr);
943 for (unsigned i = 0; i < data->mask64_data.nr; i++)
944 data->mask64_data.mask[i] = bswap_64(data->mask64_data.mask[i]);
945 break;
946 default:
947 pr_err("cpu_map swap: unsupported long size\n");
948 }
949 break;
950 case PERF_CPU_MAP__RANGE_CPUS:
951 data->range_cpu_data.start_cpu = bswap_16(data->range_cpu_data.start_cpu);
952 data->range_cpu_data.end_cpu = bswap_16(data->range_cpu_data.end_cpu);
953 break;
954 default:
955 break;
956 }
957}
958
959static void perf_event__stat_config_swap(union perf_event *event,
960 bool sample_id_all __maybe_unused)
961{
962 u64 size;
963
964 size = bswap_64(event->stat_config.nr) * sizeof(event->stat_config.data[0]);
965 size += 1; /* nr item itself */
966 mem_bswap_64(&event->stat_config.nr, size);
967}
968
969static void perf_event__stat_swap(union perf_event *event,
970 bool sample_id_all __maybe_unused)
971{
972 event->stat.id = bswap_64(event->stat.id);
973 event->stat.thread = bswap_32(event->stat.thread);
974 event->stat.cpu = bswap_32(event->stat.cpu);
975 event->stat.val = bswap_64(event->stat.val);
976 event->stat.ena = bswap_64(event->stat.ena);
977 event->stat.run = bswap_64(event->stat.run);
978}
979
980static void perf_event__stat_round_swap(union perf_event *event,
981 bool sample_id_all __maybe_unused)
982{
983 event->stat_round.type = bswap_64(event->stat_round.type);
984 event->stat_round.time = bswap_64(event->stat_round.time);
985}
986
987static void perf_event__time_conv_swap(union perf_event *event,
988 bool sample_id_all __maybe_unused)
989{
990 event->time_conv.time_shift = bswap_64(event->time_conv.time_shift);
991 event->time_conv.time_mult = bswap_64(event->time_conv.time_mult);
992 event->time_conv.time_zero = bswap_64(event->time_conv.time_zero);
993
994 if (event_contains(event->time_conv, time_cycles)) {
995 event->time_conv.time_cycles = bswap_64(event->time_conv.time_cycles);
996 event->time_conv.time_mask = bswap_64(event->time_conv.time_mask);
997 }
998}
999
1000typedef void (*perf_event__swap_op)(union perf_event *event,
1001 bool sample_id_all);
1002
1003static perf_event__swap_op perf_event__swap_ops[] = {
1004 [PERF_RECORD_MMAP] = perf_event__mmap_swap,
1005 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap,
1006 [PERF_RECORD_COMM] = perf_event__comm_swap,
1007 [PERF_RECORD_FORK] = perf_event__task_swap,
1008 [PERF_RECORD_EXIT] = perf_event__task_swap,
1009 [PERF_RECORD_LOST] = perf_event__all64_swap,
1010 [PERF_RECORD_READ] = perf_event__read_swap,
1011 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap,
1012 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap,
1013 [PERF_RECORD_SAMPLE] = perf_event__all64_swap,
1014 [PERF_RECORD_AUX] = perf_event__aux_swap,
1015 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap,
1016 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap,
1017 [PERF_RECORD_SWITCH] = perf_event__switch_swap,
1018 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap,
1019 [PERF_RECORD_NAMESPACES] = perf_event__namespaces_swap,
1020 [PERF_RECORD_CGROUP] = perf_event__cgroup_swap,
1021 [PERF_RECORD_TEXT_POKE] = perf_event__text_poke_swap,
1022 [PERF_RECORD_AUX_OUTPUT_HW_ID] = perf_event__all64_swap,
1023 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
1024 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
1025 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
1026 [PERF_RECORD_HEADER_BUILD_ID] = NULL,
1027 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap,
1028 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap,
1029 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap,
1030 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap,
1031 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap,
1032 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap,
1033 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap,
1034 [PERF_RECORD_STAT] = perf_event__stat_swap,
1035 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap,
1036 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap,
1037 [PERF_RECORD_TIME_CONV] = perf_event__time_conv_swap,
1038 [PERF_RECORD_HEADER_MAX] = NULL,
1039};
1040
1041/*
1042 * When perf record finishes a pass on every buffers, it records this pseudo
1043 * event.
1044 * We record the max timestamp t found in the pass n.
1045 * Assuming these timestamps are monotonic across cpus, we know that if
1046 * a buffer still has events with timestamps below t, they will be all
1047 * available and then read in the pass n + 1.
1048 * Hence when we start to read the pass n + 2, we can safely flush every
1049 * events with timestamps below t.
1050 *
1051 * ============ PASS n =================
1052 * CPU 0 | CPU 1
1053 * |
1054 * cnt1 timestamps | cnt2 timestamps
1055 * 1 | 2
1056 * 2 | 3
1057 * - | 4 <--- max recorded
1058 *
1059 * ============ PASS n + 1 ==============
1060 * CPU 0 | CPU 1
1061 * |
1062 * cnt1 timestamps | cnt2 timestamps
1063 * 3 | 5
1064 * 4 | 6
1065 * 5 | 7 <---- max recorded
1066 *
1067 * Flush every events below timestamp 4
1068 *
1069 * ============ PASS n + 2 ==============
1070 * CPU 0 | CPU 1
1071 * |
1072 * cnt1 timestamps | cnt2 timestamps
1073 * 6 | 8
1074 * 7 | 9
1075 * - | 10
1076 *
1077 * Flush every events below timestamp 7
1078 * etc...
1079 */
1080int perf_event__process_finished_round(struct perf_tool *tool __maybe_unused,
1081 union perf_event *event __maybe_unused,
1082 struct ordered_events *oe)
1083{
1084 if (dump_trace)
1085 fprintf(stdout, "\n");
1086 return ordered_events__flush(oe, OE_FLUSH__ROUND);
1087}
1088
1089int perf_session__queue_event(struct perf_session *s, union perf_event *event,
1090 u64 timestamp, u64 file_offset, const char *file_path)
1091{
1092 return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset, file_path);
1093}
1094
1095static void callchain__lbr_callstack_printf(struct perf_sample *sample)
1096{
1097 struct ip_callchain *callchain = sample->callchain;
1098 struct branch_stack *lbr_stack = sample->branch_stack;
1099 struct branch_entry *entries = perf_sample__branch_entries(sample);
1100 u64 kernel_callchain_nr = callchain->nr;
1101 unsigned int i;
1102
1103 for (i = 0; i < kernel_callchain_nr; i++) {
1104 if (callchain->ips[i] == PERF_CONTEXT_USER)
1105 break;
1106 }
1107
1108 if ((i != kernel_callchain_nr) && lbr_stack->nr) {
1109 u64 total_nr;
1110 /*
1111 * LBR callstack can only get user call chain,
1112 * i is kernel call chain number,
1113 * 1 is PERF_CONTEXT_USER.
1114 *
1115 * The user call chain is stored in LBR registers.
1116 * LBR are pair registers. The caller is stored
1117 * in "from" register, while the callee is stored
1118 * in "to" register.
1119 * For example, there is a call stack
1120 * "A"->"B"->"C"->"D".
1121 * The LBR registers will be recorded like
1122 * "C"->"D", "B"->"C", "A"->"B".
1123 * So only the first "to" register and all "from"
1124 * registers are needed to construct the whole stack.
1125 */
1126 total_nr = i + 1 + lbr_stack->nr + 1;
1127 kernel_callchain_nr = i + 1;
1128
1129 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
1130
1131 for (i = 0; i < kernel_callchain_nr; i++)
1132 printf("..... %2d: %016" PRIx64 "\n",
1133 i, callchain->ips[i]);
1134
1135 printf("..... %2d: %016" PRIx64 "\n",
1136 (int)(kernel_callchain_nr), entries[0].to);
1137 for (i = 0; i < lbr_stack->nr; i++)
1138 printf("..... %2d: %016" PRIx64 "\n",
1139 (int)(i + kernel_callchain_nr + 1), entries[i].from);
1140 }
1141}
1142
1143static void callchain__printf(struct evsel *evsel,
1144 struct perf_sample *sample)
1145{
1146 unsigned int i;
1147 struct ip_callchain *callchain = sample->callchain;
1148
1149 if (evsel__has_branch_callstack(evsel))
1150 callchain__lbr_callstack_printf(sample);
1151
1152 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
1153
1154 for (i = 0; i < callchain->nr; i++)
1155 printf("..... %2d: %016" PRIx64 "\n",
1156 i, callchain->ips[i]);
1157}
1158
1159static void branch_stack__printf(struct perf_sample *sample, bool callstack)
1160{
1161 struct branch_entry *entries = perf_sample__branch_entries(sample);
1162 uint64_t i;
1163
1164 if (!callstack) {
1165 printf("%s: nr:%" PRIu64 "\n", "... branch stack", sample->branch_stack->nr);
1166 } else {
1167 /* the reason of adding 1 to nr is because after expanding
1168 * branch stack it generates nr + 1 callstack records. e.g.,
1169 * B()->C()
1170 * A()->B()
1171 * the final callstack should be:
1172 * C()
1173 * B()
1174 * A()
1175 */
1176 printf("%s: nr:%" PRIu64 "\n", "... branch callstack", sample->branch_stack->nr+1);
1177 }
1178
1179 for (i = 0; i < sample->branch_stack->nr; i++) {
1180 struct branch_entry *e = &entries[i];
1181
1182 if (!callstack) {
1183 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x %s\n",
1184 i, e->from, e->to,
1185 (unsigned short)e->flags.cycles,
1186 e->flags.mispred ? "M" : " ",
1187 e->flags.predicted ? "P" : " ",
1188 e->flags.abort ? "A" : " ",
1189 e->flags.in_tx ? "T" : " ",
1190 (unsigned)e->flags.reserved,
1191 get_branch_type(e));
1192 } else {
1193 if (i == 0) {
1194 printf("..... %2"PRIu64": %016" PRIx64 "\n"
1195 "..... %2"PRIu64": %016" PRIx64 "\n",
1196 i, e->to, i+1, e->from);
1197 } else {
1198 printf("..... %2"PRIu64": %016" PRIx64 "\n", i+1, e->from);
1199 }
1200 }
1201 }
1202}
1203
1204static void regs_dump__printf(u64 mask, u64 *regs, const char *arch)
1205{
1206 unsigned rid, i = 0;
1207
1208 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
1209 u64 val = regs[i++];
1210
1211 printf(".... %-5s 0x%016" PRIx64 "\n",
1212 perf_reg_name(rid, arch), val);
1213 }
1214}
1215
1216static const char *regs_abi[] = {
1217 [PERF_SAMPLE_REGS_ABI_NONE] = "none",
1218 [PERF_SAMPLE_REGS_ABI_32] = "32-bit",
1219 [PERF_SAMPLE_REGS_ABI_64] = "64-bit",
1220};
1221
1222static inline const char *regs_dump_abi(struct regs_dump *d)
1223{
1224 if (d->abi > PERF_SAMPLE_REGS_ABI_64)
1225 return "unknown";
1226
1227 return regs_abi[d->abi];
1228}
1229
1230static void regs__printf(const char *type, struct regs_dump *regs, const char *arch)
1231{
1232 u64 mask = regs->mask;
1233
1234 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
1235 type,
1236 mask,
1237 regs_dump_abi(regs));
1238
1239 regs_dump__printf(mask, regs->regs, arch);
1240}
1241
1242static void regs_user__printf(struct perf_sample *sample, const char *arch)
1243{
1244 struct regs_dump *user_regs = &sample->user_regs;
1245
1246 if (user_regs->regs)
1247 regs__printf("user", user_regs, arch);
1248}
1249
1250static void regs_intr__printf(struct perf_sample *sample, const char *arch)
1251{
1252 struct regs_dump *intr_regs = &sample->intr_regs;
1253
1254 if (intr_regs->regs)
1255 regs__printf("intr", intr_regs, arch);
1256}
1257
1258static void stack_user__printf(struct stack_dump *dump)
1259{
1260 printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
1261 dump->size, dump->offset);
1262}
1263
1264static void evlist__print_tstamp(struct evlist *evlist, union perf_event *event, struct perf_sample *sample)
1265{
1266 u64 sample_type = __evlist__combined_sample_type(evlist);
1267
1268 if (event->header.type != PERF_RECORD_SAMPLE &&
1269 !evlist__sample_id_all(evlist)) {
1270 fputs("-1 -1 ", stdout);
1271 return;
1272 }
1273
1274 if ((sample_type & PERF_SAMPLE_CPU))
1275 printf("%u ", sample->cpu);
1276
1277 if (sample_type & PERF_SAMPLE_TIME)
1278 printf("%" PRIu64 " ", sample->time);
1279}
1280
1281static void sample_read__printf(struct perf_sample *sample, u64 read_format)
1282{
1283 printf("... sample_read:\n");
1284
1285 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1286 printf("...... time enabled %016" PRIx64 "\n",
1287 sample->read.time_enabled);
1288
1289 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1290 printf("...... time running %016" PRIx64 "\n",
1291 sample->read.time_running);
1292
1293 if (read_format & PERF_FORMAT_GROUP) {
1294 struct sample_read_value *value = sample->read.group.values;
1295
1296 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
1297
1298 sample_read_group__for_each(value, sample->read.group.nr, read_format) {
1299 printf("..... id %016" PRIx64
1300 ", value %016" PRIx64,
1301 value->id, value->value);
1302 if (read_format & PERF_FORMAT_LOST)
1303 printf(", lost %" PRIu64, value->lost);
1304 printf("\n");
1305 }
1306 } else {
1307 printf("..... id %016" PRIx64 ", value %016" PRIx64,
1308 sample->read.one.id, sample->read.one.value);
1309 if (read_format & PERF_FORMAT_LOST)
1310 printf(", lost %" PRIu64, sample->read.one.lost);
1311 printf("\n");
1312 }
1313}
1314
1315static void dump_event(struct evlist *evlist, union perf_event *event,
1316 u64 file_offset, struct perf_sample *sample,
1317 const char *file_path)
1318{
1319 if (!dump_trace)
1320 return;
1321
1322 printf("\n%#" PRIx64 "@%s [%#x]: event: %d\n",
1323 file_offset, file_path, event->header.size, event->header.type);
1324
1325 trace_event(event);
1326 if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw)
1327 evlist->trace_event_sample_raw(evlist, event, sample);
1328
1329 if (sample)
1330 evlist__print_tstamp(evlist, event, sample);
1331
1332 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
1333 event->header.size, perf_event__name(event->header.type));
1334}
1335
1336char *get_page_size_name(u64 size, char *str)
1337{
1338 if (!size || !unit_number__scnprintf(str, PAGE_SIZE_NAME_LEN, size))
1339 snprintf(str, PAGE_SIZE_NAME_LEN, "%s", "N/A");
1340
1341 return str;
1342}
1343
1344static void dump_sample(struct evsel *evsel, union perf_event *event,
1345 struct perf_sample *sample, const char *arch)
1346{
1347 u64 sample_type;
1348 char str[PAGE_SIZE_NAME_LEN];
1349
1350 if (!dump_trace)
1351 return;
1352
1353 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
1354 event->header.misc, sample->pid, sample->tid, sample->ip,
1355 sample->period, sample->addr);
1356
1357 sample_type = evsel->core.attr.sample_type;
1358
1359 if (evsel__has_callchain(evsel))
1360 callchain__printf(evsel, sample);
1361
1362 if (evsel__has_br_stack(evsel))
1363 branch_stack__printf(sample, evsel__has_branch_callstack(evsel));
1364
1365 if (sample_type & PERF_SAMPLE_REGS_USER)
1366 regs_user__printf(sample, arch);
1367
1368 if (sample_type & PERF_SAMPLE_REGS_INTR)
1369 regs_intr__printf(sample, arch);
1370
1371 if (sample_type & PERF_SAMPLE_STACK_USER)
1372 stack_user__printf(&sample->user_stack);
1373
1374 if (sample_type & PERF_SAMPLE_WEIGHT_TYPE) {
1375 printf("... weight: %" PRIu64 "", sample->weight);
1376 if (sample_type & PERF_SAMPLE_WEIGHT_STRUCT) {
1377 printf(",0x%"PRIx16"", sample->ins_lat);
1378 printf(",0x%"PRIx16"", sample->p_stage_cyc);
1379 }
1380 printf("\n");
1381 }
1382
1383 if (sample_type & PERF_SAMPLE_DATA_SRC)
1384 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
1385
1386 if (sample_type & PERF_SAMPLE_PHYS_ADDR)
1387 printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr);
1388
1389 if (sample_type & PERF_SAMPLE_DATA_PAGE_SIZE)
1390 printf(" .. data page size: %s\n", get_page_size_name(sample->data_page_size, str));
1391
1392 if (sample_type & PERF_SAMPLE_CODE_PAGE_SIZE)
1393 printf(" .. code page size: %s\n", get_page_size_name(sample->code_page_size, str));
1394
1395 if (sample_type & PERF_SAMPLE_TRANSACTION)
1396 printf("... transaction: %" PRIx64 "\n", sample->transaction);
1397
1398 if (sample_type & PERF_SAMPLE_READ)
1399 sample_read__printf(sample, evsel->core.attr.read_format);
1400}
1401
1402static void dump_read(struct evsel *evsel, union perf_event *event)
1403{
1404 struct perf_record_read *read_event = &event->read;
1405 u64 read_format;
1406
1407 if (!dump_trace)
1408 return;
1409
1410 printf(": %d %d %s %" PRI_lu64 "\n", event->read.pid, event->read.tid,
1411 evsel__name(evsel), event->read.value);
1412
1413 if (!evsel)
1414 return;
1415
1416 read_format = evsel->core.attr.read_format;
1417
1418 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1419 printf("... time enabled : %" PRI_lu64 "\n", read_event->time_enabled);
1420
1421 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1422 printf("... time running : %" PRI_lu64 "\n", read_event->time_running);
1423
1424 if (read_format & PERF_FORMAT_ID)
1425 printf("... id : %" PRI_lu64 "\n", read_event->id);
1426
1427 if (read_format & PERF_FORMAT_LOST)
1428 printf("... lost : %" PRI_lu64 "\n", read_event->lost);
1429}
1430
1431static struct machine *machines__find_for_cpumode(struct machines *machines,
1432 union perf_event *event,
1433 struct perf_sample *sample)
1434{
1435 if (perf_guest &&
1436 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1437 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1438 u32 pid;
1439
1440 if (sample->machine_pid)
1441 pid = sample->machine_pid;
1442 else if (event->header.type == PERF_RECORD_MMAP
1443 || event->header.type == PERF_RECORD_MMAP2)
1444 pid = event->mmap.pid;
1445 else
1446 pid = sample->pid;
1447
1448 /*
1449 * Guest code machine is created as needed and does not use
1450 * DEFAULT_GUEST_KERNEL_ID.
1451 */
1452 if (symbol_conf.guest_code)
1453 return machines__findnew(machines, pid);
1454
1455 return machines__find_guest(machines, pid);
1456 }
1457
1458 return &machines->host;
1459}
1460
1461static int deliver_sample_value(struct evlist *evlist,
1462 struct perf_tool *tool,
1463 union perf_event *event,
1464 struct perf_sample *sample,
1465 struct sample_read_value *v,
1466 struct machine *machine)
1467{
1468 struct perf_sample_id *sid = evlist__id2sid(evlist, v->id);
1469 struct evsel *evsel;
1470
1471 if (sid) {
1472 sample->id = v->id;
1473 sample->period = v->value - sid->period;
1474 sid->period = v->value;
1475 }
1476
1477 if (!sid || sid->evsel == NULL) {
1478 ++evlist->stats.nr_unknown_id;
1479 return 0;
1480 }
1481
1482 /*
1483 * There's no reason to deliver sample
1484 * for zero period, bail out.
1485 */
1486 if (!sample->period)
1487 return 0;
1488
1489 evsel = container_of(sid->evsel, struct evsel, core);
1490 return tool->sample(tool, event, sample, evsel, machine);
1491}
1492
1493static int deliver_sample_group(struct evlist *evlist,
1494 struct perf_tool *tool,
1495 union perf_event *event,
1496 struct perf_sample *sample,
1497 struct machine *machine,
1498 u64 read_format)
1499{
1500 int ret = -EINVAL;
1501 struct sample_read_value *v = sample->read.group.values;
1502
1503 sample_read_group__for_each(v, sample->read.group.nr, read_format) {
1504 ret = deliver_sample_value(evlist, tool, event, sample, v,
1505 machine);
1506 if (ret)
1507 break;
1508 }
1509
1510 return ret;
1511}
1512
1513static int evlist__deliver_sample(struct evlist *evlist, struct perf_tool *tool,
1514 union perf_event *event, struct perf_sample *sample,
1515 struct evsel *evsel, struct machine *machine)
1516{
1517 /* We know evsel != NULL. */
1518 u64 sample_type = evsel->core.attr.sample_type;
1519 u64 read_format = evsel->core.attr.read_format;
1520
1521 /* Standard sample delivery. */
1522 if (!(sample_type & PERF_SAMPLE_READ))
1523 return tool->sample(tool, event, sample, evsel, machine);
1524
1525 /* For PERF_SAMPLE_READ we have either single or group mode. */
1526 if (read_format & PERF_FORMAT_GROUP)
1527 return deliver_sample_group(evlist, tool, event, sample,
1528 machine, read_format);
1529 else
1530 return deliver_sample_value(evlist, tool, event, sample,
1531 &sample->read.one, machine);
1532}
1533
1534static int machines__deliver_event(struct machines *machines,
1535 struct evlist *evlist,
1536 union perf_event *event,
1537 struct perf_sample *sample,
1538 struct perf_tool *tool, u64 file_offset,
1539 const char *file_path)
1540{
1541 struct evsel *evsel;
1542 struct machine *machine;
1543
1544 dump_event(evlist, event, file_offset, sample, file_path);
1545
1546 evsel = evlist__id2evsel(evlist, sample->id);
1547
1548 machine = machines__find_for_cpumode(machines, event, sample);
1549
1550 switch (event->header.type) {
1551 case PERF_RECORD_SAMPLE:
1552 if (evsel == NULL) {
1553 ++evlist->stats.nr_unknown_id;
1554 return 0;
1555 }
1556 if (machine == NULL) {
1557 ++evlist->stats.nr_unprocessable_samples;
1558 dump_sample(evsel, event, sample, perf_env__arch(NULL));
1559 return 0;
1560 }
1561 dump_sample(evsel, event, sample, perf_env__arch(machine->env));
1562 return evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1563 case PERF_RECORD_MMAP:
1564 return tool->mmap(tool, event, sample, machine);
1565 case PERF_RECORD_MMAP2:
1566 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1567 ++evlist->stats.nr_proc_map_timeout;
1568 return tool->mmap2(tool, event, sample, machine);
1569 case PERF_RECORD_COMM:
1570 return tool->comm(tool, event, sample, machine);
1571 case PERF_RECORD_NAMESPACES:
1572 return tool->namespaces(tool, event, sample, machine);
1573 case PERF_RECORD_CGROUP:
1574 return tool->cgroup(tool, event, sample, machine);
1575 case PERF_RECORD_FORK:
1576 return tool->fork(tool, event, sample, machine);
1577 case PERF_RECORD_EXIT:
1578 return tool->exit(tool, event, sample, machine);
1579 case PERF_RECORD_LOST:
1580 if (tool->lost == perf_event__process_lost)
1581 evlist->stats.total_lost += event->lost.lost;
1582 return tool->lost(tool, event, sample, machine);
1583 case PERF_RECORD_LOST_SAMPLES:
1584 if (tool->lost_samples == perf_event__process_lost_samples)
1585 evlist->stats.total_lost_samples += event->lost_samples.lost;
1586 return tool->lost_samples(tool, event, sample, machine);
1587 case PERF_RECORD_READ:
1588 dump_read(evsel, event);
1589 return tool->read(tool, event, sample, evsel, machine);
1590 case PERF_RECORD_THROTTLE:
1591 return tool->throttle(tool, event, sample, machine);
1592 case PERF_RECORD_UNTHROTTLE:
1593 return tool->unthrottle(tool, event, sample, machine);
1594 case PERF_RECORD_AUX:
1595 if (tool->aux == perf_event__process_aux) {
1596 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED)
1597 evlist->stats.total_aux_lost += 1;
1598 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL)
1599 evlist->stats.total_aux_partial += 1;
1600 if (event->aux.flags & PERF_AUX_FLAG_COLLISION)
1601 evlist->stats.total_aux_collision += 1;
1602 }
1603 return tool->aux(tool, event, sample, machine);
1604 case PERF_RECORD_ITRACE_START:
1605 return tool->itrace_start(tool, event, sample, machine);
1606 case PERF_RECORD_SWITCH:
1607 case PERF_RECORD_SWITCH_CPU_WIDE:
1608 return tool->context_switch(tool, event, sample, machine);
1609 case PERF_RECORD_KSYMBOL:
1610 return tool->ksymbol(tool, event, sample, machine);
1611 case PERF_RECORD_BPF_EVENT:
1612 return tool->bpf(tool, event, sample, machine);
1613 case PERF_RECORD_TEXT_POKE:
1614 return tool->text_poke(tool, event, sample, machine);
1615 case PERF_RECORD_AUX_OUTPUT_HW_ID:
1616 return tool->aux_output_hw_id(tool, event, sample, machine);
1617 default:
1618 ++evlist->stats.nr_unknown_events;
1619 return -1;
1620 }
1621}
1622
1623static int perf_session__deliver_event(struct perf_session *session,
1624 union perf_event *event,
1625 struct perf_tool *tool,
1626 u64 file_offset,
1627 const char *file_path)
1628{
1629 struct perf_sample sample;
1630 int ret = evlist__parse_sample(session->evlist, event, &sample);
1631
1632 if (ret) {
1633 pr_err("Can't parse sample, err = %d\n", ret);
1634 return ret;
1635 }
1636
1637 ret = auxtrace__process_event(session, event, &sample, tool);
1638 if (ret < 0)
1639 return ret;
1640 if (ret > 0)
1641 return 0;
1642
1643 ret = machines__deliver_event(&session->machines, session->evlist,
1644 event, &sample, tool, file_offset, file_path);
1645
1646 if (dump_trace && sample.aux_sample.size)
1647 auxtrace__dump_auxtrace_sample(session, &sample);
1648
1649 return ret;
1650}
1651
1652static s64 perf_session__process_user_event(struct perf_session *session,
1653 union perf_event *event,
1654 u64 file_offset,
1655 const char *file_path)
1656{
1657 struct ordered_events *oe = &session->ordered_events;
1658 struct perf_tool *tool = session->tool;
1659 struct perf_sample sample = { .time = 0, };
1660 int fd = perf_data__fd(session->data);
1661 int err;
1662
1663 if (event->header.type != PERF_RECORD_COMPRESSED ||
1664 tool->compressed == perf_session__process_compressed_event_stub)
1665 dump_event(session->evlist, event, file_offset, &sample, file_path);
1666
1667 /* These events are processed right away */
1668 switch (event->header.type) {
1669 case PERF_RECORD_HEADER_ATTR:
1670 err = tool->attr(tool, event, &session->evlist);
1671 if (err == 0) {
1672 perf_session__set_id_hdr_size(session);
1673 perf_session__set_comm_exec(session);
1674 }
1675 return err;
1676 case PERF_RECORD_EVENT_UPDATE:
1677 return tool->event_update(tool, event, &session->evlist);
1678 case PERF_RECORD_HEADER_EVENT_TYPE:
1679 /*
1680 * Deprecated, but we need to handle it for sake
1681 * of old data files create in pipe mode.
1682 */
1683 return 0;
1684 case PERF_RECORD_HEADER_TRACING_DATA:
1685 /*
1686 * Setup for reading amidst mmap, but only when we
1687 * are in 'file' mode. The 'pipe' fd is in proper
1688 * place already.
1689 */
1690 if (!perf_data__is_pipe(session->data))
1691 lseek(fd, file_offset, SEEK_SET);
1692 return tool->tracing_data(session, event);
1693 case PERF_RECORD_HEADER_BUILD_ID:
1694 return tool->build_id(session, event);
1695 case PERF_RECORD_FINISHED_ROUND:
1696 return tool->finished_round(tool, event, oe);
1697 case PERF_RECORD_ID_INDEX:
1698 return tool->id_index(session, event);
1699 case PERF_RECORD_AUXTRACE_INFO:
1700 return tool->auxtrace_info(session, event);
1701 case PERF_RECORD_AUXTRACE:
1702 /* setup for reading amidst mmap */
1703 lseek(fd, file_offset + event->header.size, SEEK_SET);
1704 return tool->auxtrace(session, event);
1705 case PERF_RECORD_AUXTRACE_ERROR:
1706 perf_session__auxtrace_error_inc(session, event);
1707 return tool->auxtrace_error(session, event);
1708 case PERF_RECORD_THREAD_MAP:
1709 return tool->thread_map(session, event);
1710 case PERF_RECORD_CPU_MAP:
1711 return tool->cpu_map(session, event);
1712 case PERF_RECORD_STAT_CONFIG:
1713 return tool->stat_config(session, event);
1714 case PERF_RECORD_STAT:
1715 return tool->stat(session, event);
1716 case PERF_RECORD_STAT_ROUND:
1717 return tool->stat_round(session, event);
1718 case PERF_RECORD_TIME_CONV:
1719 session->time_conv = event->time_conv;
1720 return tool->time_conv(session, event);
1721 case PERF_RECORD_HEADER_FEATURE:
1722 return tool->feature(session, event);
1723 case PERF_RECORD_COMPRESSED:
1724 err = tool->compressed(session, event, file_offset, file_path);
1725 if (err)
1726 dump_event(session->evlist, event, file_offset, &sample, file_path);
1727 return err;
1728 case PERF_RECORD_FINISHED_INIT:
1729 return tool->finished_init(session, event);
1730 default:
1731 return -EINVAL;
1732 }
1733}
1734
1735int perf_session__deliver_synth_event(struct perf_session *session,
1736 union perf_event *event,
1737 struct perf_sample *sample)
1738{
1739 struct evlist *evlist = session->evlist;
1740 struct perf_tool *tool = session->tool;
1741
1742 events_stats__inc(&evlist->stats, event->header.type);
1743
1744 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1745 return perf_session__process_user_event(session, event, 0, NULL);
1746
1747 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0, NULL);
1748}
1749
1750static void event_swap(union perf_event *event, bool sample_id_all)
1751{
1752 perf_event__swap_op swap;
1753
1754 swap = perf_event__swap_ops[event->header.type];
1755 if (swap)
1756 swap(event, sample_id_all);
1757}
1758
1759int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1760 void *buf, size_t buf_sz,
1761 union perf_event **event_ptr,
1762 struct perf_sample *sample)
1763{
1764 union perf_event *event;
1765 size_t hdr_sz, rest;
1766 int fd;
1767
1768 if (session->one_mmap && !session->header.needs_swap) {
1769 event = file_offset - session->one_mmap_offset +
1770 session->one_mmap_addr;
1771 goto out_parse_sample;
1772 }
1773
1774 if (perf_data__is_pipe(session->data))
1775 return -1;
1776
1777 fd = perf_data__fd(session->data);
1778 hdr_sz = sizeof(struct perf_event_header);
1779
1780 if (buf_sz < hdr_sz)
1781 return -1;
1782
1783 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1784 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1785 return -1;
1786
1787 event = (union perf_event *)buf;
1788
1789 if (session->header.needs_swap)
1790 perf_event_header__bswap(&event->header);
1791
1792 if (event->header.size < hdr_sz || event->header.size > buf_sz)
1793 return -1;
1794
1795 buf += hdr_sz;
1796 rest = event->header.size - hdr_sz;
1797
1798 if (readn(fd, buf, rest) != (ssize_t)rest)
1799 return -1;
1800
1801 if (session->header.needs_swap)
1802 event_swap(event, evlist__sample_id_all(session->evlist));
1803
1804out_parse_sample:
1805
1806 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1807 evlist__parse_sample(session->evlist, event, sample))
1808 return -1;
1809
1810 *event_ptr = event;
1811
1812 return 0;
1813}
1814
1815int perf_session__peek_events(struct perf_session *session, u64 offset,
1816 u64 size, peek_events_cb_t cb, void *data)
1817{
1818 u64 max_offset = offset + size;
1819 char buf[PERF_SAMPLE_MAX_SIZE];
1820 union perf_event *event;
1821 int err;
1822
1823 do {
1824 err = perf_session__peek_event(session, offset, buf,
1825 PERF_SAMPLE_MAX_SIZE, &event,
1826 NULL);
1827 if (err)
1828 return err;
1829
1830 err = cb(session, event, offset, data);
1831 if (err)
1832 return err;
1833
1834 offset += event->header.size;
1835 if (event->header.type == PERF_RECORD_AUXTRACE)
1836 offset += event->auxtrace.size;
1837
1838 } while (offset < max_offset);
1839
1840 return err;
1841}
1842
1843static s64 perf_session__process_event(struct perf_session *session,
1844 union perf_event *event, u64 file_offset,
1845 const char *file_path)
1846{
1847 struct evlist *evlist = session->evlist;
1848 struct perf_tool *tool = session->tool;
1849 int ret;
1850
1851 if (session->header.needs_swap)
1852 event_swap(event, evlist__sample_id_all(evlist));
1853
1854 if (event->header.type >= PERF_RECORD_HEADER_MAX)
1855 return -EINVAL;
1856
1857 events_stats__inc(&evlist->stats, event->header.type);
1858
1859 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1860 return perf_session__process_user_event(session, event, file_offset, file_path);
1861
1862 if (tool->ordered_events) {
1863 u64 timestamp = -1ULL;
1864
1865 ret = evlist__parse_sample_timestamp(evlist, event, ×tamp);
1866 if (ret && ret != -1)
1867 return ret;
1868
1869 ret = perf_session__queue_event(session, event, timestamp, file_offset, file_path);
1870 if (ret != -ETIME)
1871 return ret;
1872 }
1873
1874 return perf_session__deliver_event(session, event, tool, file_offset, file_path);
1875}
1876
1877void perf_event_header__bswap(struct perf_event_header *hdr)
1878{
1879 hdr->type = bswap_32(hdr->type);
1880 hdr->misc = bswap_16(hdr->misc);
1881 hdr->size = bswap_16(hdr->size);
1882}
1883
1884struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1885{
1886 return machine__findnew_thread(&session->machines.host, -1, pid);
1887}
1888
1889int perf_session__register_idle_thread(struct perf_session *session)
1890{
1891 struct thread *thread = machine__idle_thread(&session->machines.host);
1892
1893 /* machine__idle_thread() got the thread, so put it */
1894 thread__put(thread);
1895 return thread ? 0 : -1;
1896}
1897
1898static void
1899perf_session__warn_order(const struct perf_session *session)
1900{
1901 const struct ordered_events *oe = &session->ordered_events;
1902 struct evsel *evsel;
1903 bool should_warn = true;
1904
1905 evlist__for_each_entry(session->evlist, evsel) {
1906 if (evsel->core.attr.write_backward)
1907 should_warn = false;
1908 }
1909
1910 if (!should_warn)
1911 return;
1912 if (oe->nr_unordered_events != 0)
1913 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1914}
1915
1916static void perf_session__warn_about_errors(const struct perf_session *session)
1917{
1918 const struct events_stats *stats = &session->evlist->stats;
1919
1920 if (session->tool->lost == perf_event__process_lost &&
1921 stats->nr_events[PERF_RECORD_LOST] != 0) {
1922 ui__warning("Processed %d events and lost %d chunks!\n\n"
1923 "Check IO/CPU overload!\n\n",
1924 stats->nr_events[0],
1925 stats->nr_events[PERF_RECORD_LOST]);
1926 }
1927
1928 if (session->tool->lost_samples == perf_event__process_lost_samples) {
1929 double drop_rate;
1930
1931 drop_rate = (double)stats->total_lost_samples /
1932 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1933 if (drop_rate > 0.05) {
1934 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n",
1935 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1936 drop_rate * 100.0);
1937 }
1938 }
1939
1940 if (session->tool->aux == perf_event__process_aux &&
1941 stats->total_aux_lost != 0) {
1942 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1943 stats->total_aux_lost,
1944 stats->nr_events[PERF_RECORD_AUX]);
1945 }
1946
1947 if (session->tool->aux == perf_event__process_aux &&
1948 stats->total_aux_partial != 0) {
1949 bool vmm_exclusive = false;
1950
1951 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive",
1952 &vmm_exclusive);
1953
1954 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n"
1955 "Are you running a KVM guest in the background?%s\n\n",
1956 stats->total_aux_partial,
1957 stats->nr_events[PERF_RECORD_AUX],
1958 vmm_exclusive ?
1959 "\nReloading kvm_intel module with vmm_exclusive=0\n"
1960 "will reduce the gaps to only guest's timeslices." :
1961 "");
1962 }
1963
1964 if (session->tool->aux == perf_event__process_aux &&
1965 stats->total_aux_collision != 0) {
1966 ui__warning("AUX data detected collision %" PRIu64 " times out of %u!\n\n",
1967 stats->total_aux_collision,
1968 stats->nr_events[PERF_RECORD_AUX]);
1969 }
1970
1971 if (stats->nr_unknown_events != 0) {
1972 ui__warning("Found %u unknown events!\n\n"
1973 "Is this an older tool processing a perf.data "
1974 "file generated by a more recent tool?\n\n"
1975 "If that is not the case, consider "
1976 "reporting to linux-kernel@vger.kernel.org.\n\n",
1977 stats->nr_unknown_events);
1978 }
1979
1980 if (stats->nr_unknown_id != 0) {
1981 ui__warning("%u samples with id not present in the header\n",
1982 stats->nr_unknown_id);
1983 }
1984
1985 if (stats->nr_invalid_chains != 0) {
1986 ui__warning("Found invalid callchains!\n\n"
1987 "%u out of %u events were discarded for this reason.\n\n"
1988 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1989 stats->nr_invalid_chains,
1990 stats->nr_events[PERF_RECORD_SAMPLE]);
1991 }
1992
1993 if (stats->nr_unprocessable_samples != 0) {
1994 ui__warning("%u unprocessable samples recorded.\n"
1995 "Do you have a KVM guest running and not using 'perf kvm'?\n",
1996 stats->nr_unprocessable_samples);
1997 }
1998
1999 perf_session__warn_order(session);
2000
2001 events_stats__auxtrace_error_warn(stats);
2002
2003 if (stats->nr_proc_map_timeout != 0) {
2004 ui__warning("%d map information files for pre-existing threads were\n"
2005 "not processed, if there are samples for addresses they\n"
2006 "will not be resolved, you may find out which are these\n"
2007 "threads by running with -v and redirecting the output\n"
2008 "to a file.\n"
2009 "The time limit to process proc map is too short?\n"
2010 "Increase it by --proc-map-timeout\n",
2011 stats->nr_proc_map_timeout);
2012 }
2013}
2014
2015static int perf_session__flush_thread_stack(struct thread *thread,
2016 void *p __maybe_unused)
2017{
2018 return thread_stack__flush(thread);
2019}
2020
2021static int perf_session__flush_thread_stacks(struct perf_session *session)
2022{
2023 return machines__for_each_thread(&session->machines,
2024 perf_session__flush_thread_stack,
2025 NULL);
2026}
2027
2028volatile sig_atomic_t session_done;
2029
2030static int __perf_session__process_decomp_events(struct perf_session *session);
2031
2032static int __perf_session__process_pipe_events(struct perf_session *session)
2033{
2034 struct ordered_events *oe = &session->ordered_events;
2035 struct perf_tool *tool = session->tool;
2036 union perf_event *event;
2037 uint32_t size, cur_size = 0;
2038 void *buf = NULL;
2039 s64 skip = 0;
2040 u64 head;
2041 ssize_t err;
2042 void *p;
2043
2044 perf_tool__fill_defaults(tool);
2045
2046 head = 0;
2047 cur_size = sizeof(union perf_event);
2048
2049 buf = malloc(cur_size);
2050 if (!buf)
2051 return -errno;
2052 ordered_events__set_copy_on_queue(oe, true);
2053more:
2054 event = buf;
2055 err = perf_data__read(session->data, event,
2056 sizeof(struct perf_event_header));
2057 if (err <= 0) {
2058 if (err == 0)
2059 goto done;
2060
2061 pr_err("failed to read event header\n");
2062 goto out_err;
2063 }
2064
2065 if (session->header.needs_swap)
2066 perf_event_header__bswap(&event->header);
2067
2068 size = event->header.size;
2069 if (size < sizeof(struct perf_event_header)) {
2070 pr_err("bad event header size\n");
2071 goto out_err;
2072 }
2073
2074 if (size > cur_size) {
2075 void *new = realloc(buf, size);
2076 if (!new) {
2077 pr_err("failed to allocate memory to read event\n");
2078 goto out_err;
2079 }
2080 buf = new;
2081 cur_size = size;
2082 event = buf;
2083 }
2084 p = event;
2085 p += sizeof(struct perf_event_header);
2086
2087 if (size - sizeof(struct perf_event_header)) {
2088 err = perf_data__read(session->data, p,
2089 size - sizeof(struct perf_event_header));
2090 if (err <= 0) {
2091 if (err == 0) {
2092 pr_err("unexpected end of event stream\n");
2093 goto done;
2094 }
2095
2096 pr_err("failed to read event data\n");
2097 goto out_err;
2098 }
2099 }
2100
2101 if ((skip = perf_session__process_event(session, event, head, "pipe")) < 0) {
2102 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
2103 head, event->header.size, event->header.type);
2104 err = -EINVAL;
2105 goto out_err;
2106 }
2107
2108 head += size;
2109
2110 if (skip > 0)
2111 head += skip;
2112
2113 err = __perf_session__process_decomp_events(session);
2114 if (err)
2115 goto out_err;
2116
2117 if (!session_done())
2118 goto more;
2119done:
2120 /* do the final flush for ordered samples */
2121 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
2122 if (err)
2123 goto out_err;
2124 err = auxtrace__flush_events(session, tool);
2125 if (err)
2126 goto out_err;
2127 err = perf_session__flush_thread_stacks(session);
2128out_err:
2129 free(buf);
2130 if (!tool->no_warn)
2131 perf_session__warn_about_errors(session);
2132 ordered_events__free(&session->ordered_events);
2133 auxtrace__free_events(session);
2134 return err;
2135}
2136
2137static union perf_event *
2138prefetch_event(char *buf, u64 head, size_t mmap_size,
2139 bool needs_swap, union perf_event *error)
2140{
2141 union perf_event *event;
2142 u16 event_size;
2143
2144 /*
2145 * Ensure we have enough space remaining to read
2146 * the size of the event in the headers.
2147 */
2148 if (head + sizeof(event->header) > mmap_size)
2149 return NULL;
2150
2151 event = (union perf_event *)(buf + head);
2152 if (needs_swap)
2153 perf_event_header__bswap(&event->header);
2154
2155 event_size = event->header.size;
2156 if (head + event_size <= mmap_size)
2157 return event;
2158
2159 /* We're not fetching the event so swap back again */
2160 if (needs_swap)
2161 perf_event_header__bswap(&event->header);
2162
2163 /* Check if the event fits into the next mmapped buf. */
2164 if (event_size <= mmap_size - head % page_size) {
2165 /* Remap buf and fetch again. */
2166 return NULL;
2167 }
2168
2169 /* Invalid input. Event size should never exceed mmap_size. */
2170 pr_debug("%s: head=%#" PRIx64 " event->header.size=%#x, mmap_size=%#zx:"
2171 " fuzzed or compressed perf.data?\n", __func__, head, event_size, mmap_size);
2172
2173 return error;
2174}
2175
2176static union perf_event *
2177fetch_mmaped_event(u64 head, size_t mmap_size, char *buf, bool needs_swap)
2178{
2179 return prefetch_event(buf, head, mmap_size, needs_swap, ERR_PTR(-EINVAL));
2180}
2181
2182static union perf_event *
2183fetch_decomp_event(u64 head, size_t mmap_size, char *buf, bool needs_swap)
2184{
2185 return prefetch_event(buf, head, mmap_size, needs_swap, NULL);
2186}
2187
2188static int __perf_session__process_decomp_events(struct perf_session *session)
2189{
2190 s64 skip;
2191 u64 size;
2192 struct decomp *decomp = session->active_decomp->decomp_last;
2193
2194 if (!decomp)
2195 return 0;
2196
2197 while (decomp->head < decomp->size && !session_done()) {
2198 union perf_event *event = fetch_decomp_event(decomp->head, decomp->size, decomp->data,
2199 session->header.needs_swap);
2200
2201 if (!event)
2202 break;
2203
2204 size = event->header.size;
2205
2206 if (size < sizeof(struct perf_event_header) ||
2207 (skip = perf_session__process_event(session, event, decomp->file_pos,
2208 decomp->file_path)) < 0) {
2209 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
2210 decomp->file_pos + decomp->head, event->header.size, event->header.type);
2211 return -EINVAL;
2212 }
2213
2214 if (skip)
2215 size += skip;
2216
2217 decomp->head += size;
2218 }
2219
2220 return 0;
2221}
2222
2223/*
2224 * On 64bit we can mmap the data file in one go. No need for tiny mmap
2225 * slices. On 32bit we use 32MB.
2226 */
2227#if BITS_PER_LONG == 64
2228#define MMAP_SIZE ULLONG_MAX
2229#define NUM_MMAPS 1
2230#else
2231#define MMAP_SIZE (32 * 1024 * 1024ULL)
2232#define NUM_MMAPS 128
2233#endif
2234
2235struct reader;
2236
2237typedef s64 (*reader_cb_t)(struct perf_session *session,
2238 union perf_event *event,
2239 u64 file_offset,
2240 const char *file_path);
2241
2242struct reader {
2243 int fd;
2244 const char *path;
2245 u64 data_size;
2246 u64 data_offset;
2247 reader_cb_t process;
2248 bool in_place_update;
2249 char *mmaps[NUM_MMAPS];
2250 size_t mmap_size;
2251 int mmap_idx;
2252 char *mmap_cur;
2253 u64 file_pos;
2254 u64 file_offset;
2255 u64 head;
2256 u64 size;
2257 bool done;
2258 struct zstd_data zstd_data;
2259 struct decomp_data decomp_data;
2260};
2261
2262static int
2263reader__init(struct reader *rd, bool *one_mmap)
2264{
2265 u64 data_size = rd->data_size;
2266 char **mmaps = rd->mmaps;
2267
2268 rd->head = rd->data_offset;
2269 data_size += rd->data_offset;
2270
2271 rd->mmap_size = MMAP_SIZE;
2272 if (rd->mmap_size > data_size) {
2273 rd->mmap_size = data_size;
2274 if (one_mmap)
2275 *one_mmap = true;
2276 }
2277
2278 memset(mmaps, 0, sizeof(rd->mmaps));
2279
2280 if (zstd_init(&rd->zstd_data, 0))
2281 return -1;
2282 rd->decomp_data.zstd_decomp = &rd->zstd_data;
2283
2284 return 0;
2285}
2286
2287static void
2288reader__release_decomp(struct reader *rd)
2289{
2290 perf_decomp__release_events(rd->decomp_data.decomp);
2291 zstd_fini(&rd->zstd_data);
2292}
2293
2294static int
2295reader__mmap(struct reader *rd, struct perf_session *session)
2296{
2297 int mmap_prot, mmap_flags;
2298 char *buf, **mmaps = rd->mmaps;
2299 u64 page_offset;
2300
2301 mmap_prot = PROT_READ;
2302 mmap_flags = MAP_SHARED;
2303
2304 if (rd->in_place_update) {
2305 mmap_prot |= PROT_WRITE;
2306 } else if (session->header.needs_swap) {
2307 mmap_prot |= PROT_WRITE;
2308 mmap_flags = MAP_PRIVATE;
2309 }
2310
2311 if (mmaps[rd->mmap_idx]) {
2312 munmap(mmaps[rd->mmap_idx], rd->mmap_size);
2313 mmaps[rd->mmap_idx] = NULL;
2314 }
2315
2316 page_offset = page_size * (rd->head / page_size);
2317 rd->file_offset += page_offset;
2318 rd->head -= page_offset;
2319
2320 buf = mmap(NULL, rd->mmap_size, mmap_prot, mmap_flags, rd->fd,
2321 rd->file_offset);
2322 if (buf == MAP_FAILED) {
2323 pr_err("failed to mmap file\n");
2324 return -errno;
2325 }
2326 mmaps[rd->mmap_idx] = rd->mmap_cur = buf;
2327 rd->mmap_idx = (rd->mmap_idx + 1) & (ARRAY_SIZE(rd->mmaps) - 1);
2328 rd->file_pos = rd->file_offset + rd->head;
2329 if (session->one_mmap) {
2330 session->one_mmap_addr = buf;
2331 session->one_mmap_offset = rd->file_offset;
2332 }
2333
2334 return 0;
2335}
2336
2337enum {
2338 READER_OK,
2339 READER_NODATA,
2340};
2341
2342static int
2343reader__read_event(struct reader *rd, struct perf_session *session,
2344 struct ui_progress *prog)
2345{
2346 u64 size;
2347 int err = READER_OK;
2348 union perf_event *event;
2349 s64 skip;
2350
2351 event = fetch_mmaped_event(rd->head, rd->mmap_size, rd->mmap_cur,
2352 session->header.needs_swap);
2353 if (IS_ERR(event))
2354 return PTR_ERR(event);
2355
2356 if (!event)
2357 return READER_NODATA;
2358
2359 size = event->header.size;
2360
2361 skip = -EINVAL;
2362
2363 if (size < sizeof(struct perf_event_header) ||
2364 (skip = rd->process(session, event, rd->file_pos, rd->path)) < 0) {
2365 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n",
2366 rd->file_offset + rd->head, event->header.size,
2367 event->header.type, strerror(-skip));
2368 err = skip;
2369 goto out;
2370 }
2371
2372 if (skip)
2373 size += skip;
2374
2375 rd->size += size;
2376 rd->head += size;
2377 rd->file_pos += size;
2378
2379 err = __perf_session__process_decomp_events(session);
2380 if (err)
2381 goto out;
2382
2383 ui_progress__update(prog, size);
2384
2385out:
2386 return err;
2387}
2388
2389static inline bool
2390reader__eof(struct reader *rd)
2391{
2392 return (rd->file_pos >= rd->data_size + rd->data_offset);
2393}
2394
2395static int
2396reader__process_events(struct reader *rd, struct perf_session *session,
2397 struct ui_progress *prog)
2398{
2399 int err;
2400
2401 err = reader__init(rd, &session->one_mmap);
2402 if (err)
2403 goto out;
2404
2405 session->active_decomp = &rd->decomp_data;
2406
2407remap:
2408 err = reader__mmap(rd, session);
2409 if (err)
2410 goto out;
2411
2412more:
2413 err = reader__read_event(rd, session, prog);
2414 if (err < 0)
2415 goto out;
2416 else if (err == READER_NODATA)
2417 goto remap;
2418
2419 if (session_done())
2420 goto out;
2421
2422 if (!reader__eof(rd))
2423 goto more;
2424
2425out:
2426 session->active_decomp = &session->decomp_data;
2427 return err;
2428}
2429
2430static s64 process_simple(struct perf_session *session,
2431 union perf_event *event,
2432 u64 file_offset,
2433 const char *file_path)
2434{
2435 return perf_session__process_event(session, event, file_offset, file_path);
2436}
2437
2438static int __perf_session__process_events(struct perf_session *session)
2439{
2440 struct reader rd = {
2441 .fd = perf_data__fd(session->data),
2442 .path = session->data->file.path,
2443 .data_size = session->header.data_size,
2444 .data_offset = session->header.data_offset,
2445 .process = process_simple,
2446 .in_place_update = session->data->in_place_update,
2447 };
2448 struct ordered_events *oe = &session->ordered_events;
2449 struct perf_tool *tool = session->tool;
2450 struct ui_progress prog;
2451 int err;
2452
2453 perf_tool__fill_defaults(tool);
2454
2455 if (rd.data_size == 0)
2456 return -1;
2457
2458 ui_progress__init_size(&prog, rd.data_size, "Processing events...");
2459
2460 err = reader__process_events(&rd, session, &prog);
2461 if (err)
2462 goto out_err;
2463 /* do the final flush for ordered samples */
2464 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
2465 if (err)
2466 goto out_err;
2467 err = auxtrace__flush_events(session, tool);
2468 if (err)
2469 goto out_err;
2470 err = perf_session__flush_thread_stacks(session);
2471out_err:
2472 ui_progress__finish();
2473 if (!tool->no_warn)
2474 perf_session__warn_about_errors(session);
2475 /*
2476 * We may switching perf.data output, make ordered_events
2477 * reusable.
2478 */
2479 ordered_events__reinit(&session->ordered_events);
2480 auxtrace__free_events(session);
2481 reader__release_decomp(&rd);
2482 session->one_mmap = false;
2483 return err;
2484}
2485
2486/*
2487 * Processing 2 MB of data from each reader in sequence,
2488 * because that's the way the ordered events sorting works
2489 * most efficiently.
2490 */
2491#define READER_MAX_SIZE (2 * 1024 * 1024)
2492
2493/*
2494 * This function reads, merge and process directory data.
2495 * It assumens the version 1 of directory data, where each
2496 * data file holds per-cpu data, already sorted by kernel.
2497 */
2498static int __perf_session__process_dir_events(struct perf_session *session)
2499{
2500 struct perf_data *data = session->data;
2501 struct perf_tool *tool = session->tool;
2502 int i, ret, readers, nr_readers;
2503 struct ui_progress prog;
2504 u64 total_size = perf_data__size(session->data);
2505 struct reader *rd;
2506
2507 perf_tool__fill_defaults(tool);
2508
2509 ui_progress__init_size(&prog, total_size, "Sorting events...");
2510
2511 nr_readers = 1;
2512 for (i = 0; i < data->dir.nr; i++) {
2513 if (data->dir.files[i].size)
2514 nr_readers++;
2515 }
2516
2517 rd = zalloc(nr_readers * sizeof(struct reader));
2518 if (!rd)
2519 return -ENOMEM;
2520
2521 rd[0] = (struct reader) {
2522 .fd = perf_data__fd(session->data),
2523 .path = session->data->file.path,
2524 .data_size = session->header.data_size,
2525 .data_offset = session->header.data_offset,
2526 .process = process_simple,
2527 .in_place_update = session->data->in_place_update,
2528 };
2529 ret = reader__init(&rd[0], NULL);
2530 if (ret)
2531 goto out_err;
2532 ret = reader__mmap(&rd[0], session);
2533 if (ret)
2534 goto out_err;
2535 readers = 1;
2536
2537 for (i = 0; i < data->dir.nr; i++) {
2538 if (!data->dir.files[i].size)
2539 continue;
2540 rd[readers] = (struct reader) {
2541 .fd = data->dir.files[i].fd,
2542 .path = data->dir.files[i].path,
2543 .data_size = data->dir.files[i].size,
2544 .data_offset = 0,
2545 .process = process_simple,
2546 .in_place_update = session->data->in_place_update,
2547 };
2548 ret = reader__init(&rd[readers], NULL);
2549 if (ret)
2550 goto out_err;
2551 ret = reader__mmap(&rd[readers], session);
2552 if (ret)
2553 goto out_err;
2554 readers++;
2555 }
2556
2557 i = 0;
2558 while (readers) {
2559 if (session_done())
2560 break;
2561
2562 if (rd[i].done) {
2563 i = (i + 1) % nr_readers;
2564 continue;
2565 }
2566 if (reader__eof(&rd[i])) {
2567 rd[i].done = true;
2568 readers--;
2569 continue;
2570 }
2571
2572 session->active_decomp = &rd[i].decomp_data;
2573 ret = reader__read_event(&rd[i], session, &prog);
2574 if (ret < 0) {
2575 goto out_err;
2576 } else if (ret == READER_NODATA) {
2577 ret = reader__mmap(&rd[i], session);
2578 if (ret)
2579 goto out_err;
2580 }
2581
2582 if (rd[i].size >= READER_MAX_SIZE) {
2583 rd[i].size = 0;
2584 i = (i + 1) % nr_readers;
2585 }
2586 }
2587
2588 ret = ordered_events__flush(&session->ordered_events, OE_FLUSH__FINAL);
2589 if (ret)
2590 goto out_err;
2591
2592 ret = perf_session__flush_thread_stacks(session);
2593out_err:
2594 ui_progress__finish();
2595
2596 if (!tool->no_warn)
2597 perf_session__warn_about_errors(session);
2598
2599 /*
2600 * We may switching perf.data output, make ordered_events
2601 * reusable.
2602 */
2603 ordered_events__reinit(&session->ordered_events);
2604
2605 session->one_mmap = false;
2606
2607 session->active_decomp = &session->decomp_data;
2608 for (i = 0; i < nr_readers; i++)
2609 reader__release_decomp(&rd[i]);
2610 zfree(&rd);
2611
2612 return ret;
2613}
2614
2615int perf_session__process_events(struct perf_session *session)
2616{
2617 if (perf_session__register_idle_thread(session) < 0)
2618 return -ENOMEM;
2619
2620 if (perf_data__is_pipe(session->data))
2621 return __perf_session__process_pipe_events(session);
2622
2623 if (perf_data__is_dir(session->data) && session->data->dir.nr)
2624 return __perf_session__process_dir_events(session);
2625
2626 return __perf_session__process_events(session);
2627}
2628
2629bool perf_session__has_traces(struct perf_session *session, const char *msg)
2630{
2631 struct evsel *evsel;
2632
2633 evlist__for_each_entry(session->evlist, evsel) {
2634 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT)
2635 return true;
2636 }
2637
2638 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
2639 return false;
2640}
2641
2642int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr)
2643{
2644 char *bracket;
2645 struct ref_reloc_sym *ref;
2646 struct kmap *kmap;
2647
2648 ref = zalloc(sizeof(struct ref_reloc_sym));
2649 if (ref == NULL)
2650 return -ENOMEM;
2651
2652 ref->name = strdup(symbol_name);
2653 if (ref->name == NULL) {
2654 free(ref);
2655 return -ENOMEM;
2656 }
2657
2658 bracket = strchr(ref->name, ']');
2659 if (bracket)
2660 *bracket = '\0';
2661
2662 ref->addr = addr;
2663
2664 kmap = map__kmap(map);
2665 if (kmap)
2666 kmap->ref_reloc_sym = ref;
2667
2668 return 0;
2669}
2670
2671size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
2672{
2673 return machines__fprintf_dsos(&session->machines, fp);
2674}
2675
2676size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
2677 bool (skip)(struct dso *dso, int parm), int parm)
2678{
2679 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
2680}
2681
2682size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp,
2683 bool skip_empty)
2684{
2685 size_t ret;
2686 const char *msg = "";
2687
2688 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
2689 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
2690
2691 ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
2692
2693 ret += events_stats__fprintf(&session->evlist->stats, fp, skip_empty);
2694 return ret;
2695}
2696
2697size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
2698{
2699 /*
2700 * FIXME: Here we have to actually print all the machines in this
2701 * session, not just the host...
2702 */
2703 return machine__fprintf(&session->machines.host, fp);
2704}
2705
2706struct evsel *perf_session__find_first_evtype(struct perf_session *session,
2707 unsigned int type)
2708{
2709 struct evsel *pos;
2710
2711 evlist__for_each_entry(session->evlist, pos) {
2712 if (pos->core.attr.type == type)
2713 return pos;
2714 }
2715 return NULL;
2716}
2717
2718int perf_session__cpu_bitmap(struct perf_session *session,
2719 const char *cpu_list, unsigned long *cpu_bitmap)
2720{
2721 int i, err = -1;
2722 struct perf_cpu_map *map;
2723 int nr_cpus = min(session->header.env.nr_cpus_avail, MAX_NR_CPUS);
2724
2725 for (i = 0; i < PERF_TYPE_MAX; ++i) {
2726 struct evsel *evsel;
2727
2728 evsel = perf_session__find_first_evtype(session, i);
2729 if (!evsel)
2730 continue;
2731
2732 if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CPU)) {
2733 pr_err("File does not contain CPU events. "
2734 "Remove -C option to proceed.\n");
2735 return -1;
2736 }
2737 }
2738
2739 map = perf_cpu_map__new(cpu_list);
2740 if (map == NULL) {
2741 pr_err("Invalid cpu_list\n");
2742 return -1;
2743 }
2744
2745 for (i = 0; i < perf_cpu_map__nr(map); i++) {
2746 struct perf_cpu cpu = perf_cpu_map__cpu(map, i);
2747
2748 if (cpu.cpu >= nr_cpus) {
2749 pr_err("Requested CPU %d too large. "
2750 "Consider raising MAX_NR_CPUS\n", cpu.cpu);
2751 goto out_delete_map;
2752 }
2753
2754 __set_bit(cpu.cpu, cpu_bitmap);
2755 }
2756
2757 err = 0;
2758
2759out_delete_map:
2760 perf_cpu_map__put(map);
2761 return err;
2762}
2763
2764void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
2765 bool full)
2766{
2767 if (session == NULL || fp == NULL)
2768 return;
2769
2770 fprintf(fp, "# ========\n");
2771 perf_header__fprintf_info(session, fp, full);
2772 fprintf(fp, "# ========\n#\n");
2773}
2774
2775static int perf_session__register_guest(struct perf_session *session, pid_t machine_pid)
2776{
2777 struct machine *machine = machines__findnew(&session->machines, machine_pid);
2778 struct thread *thread;
2779
2780 if (!machine)
2781 return -ENOMEM;
2782
2783 machine->single_address_space = session->machines.host.single_address_space;
2784
2785 thread = machine__idle_thread(machine);
2786 if (!thread)
2787 return -ENOMEM;
2788 thread__put(thread);
2789
2790 machine->kallsyms_filename = perf_data__guest_kallsyms_name(session->data, machine_pid);
2791
2792 return 0;
2793}
2794
2795static int perf_session__set_guest_cpu(struct perf_session *session, pid_t pid,
2796 pid_t tid, int guest_cpu)
2797{
2798 struct machine *machine = &session->machines.host;
2799 struct thread *thread = machine__findnew_thread(machine, pid, tid);
2800
2801 if (!thread)
2802 return -ENOMEM;
2803 thread->guest_cpu = guest_cpu;
2804 thread__put(thread);
2805
2806 return 0;
2807}
2808
2809int perf_event__process_id_index(struct perf_session *session,
2810 union perf_event *event)
2811{
2812 struct evlist *evlist = session->evlist;
2813 struct perf_record_id_index *ie = &event->id_index;
2814 size_t sz = ie->header.size - sizeof(*ie);
2815 size_t i, nr, max_nr;
2816 size_t e1_sz = sizeof(struct id_index_entry);
2817 size_t e2_sz = sizeof(struct id_index_entry_2);
2818 size_t etot_sz = e1_sz + e2_sz;
2819 struct id_index_entry_2 *e2;
2820 pid_t last_pid = 0;
2821
2822 max_nr = sz / e1_sz;
2823 nr = ie->nr;
2824 if (nr > max_nr) {
2825 printf("Too big: nr %zu max_nr %zu\n", nr, max_nr);
2826 return -EINVAL;
2827 }
2828
2829 if (sz >= nr * etot_sz) {
2830 max_nr = sz / etot_sz;
2831 if (nr > max_nr) {
2832 printf("Too big2: nr %zu max_nr %zu\n", nr, max_nr);
2833 return -EINVAL;
2834 }
2835 e2 = (void *)ie + sizeof(*ie) + nr * e1_sz;
2836 } else {
2837 e2 = NULL;
2838 }
2839
2840 if (dump_trace)
2841 fprintf(stdout, " nr: %zu\n", nr);
2842
2843 for (i = 0; i < nr; i++, (e2 ? e2++ : 0)) {
2844 struct id_index_entry *e = &ie->entries[i];
2845 struct perf_sample_id *sid;
2846 int ret;
2847
2848 if (dump_trace) {
2849 fprintf(stdout, " ... id: %"PRI_lu64, e->id);
2850 fprintf(stdout, " idx: %"PRI_lu64, e->idx);
2851 fprintf(stdout, " cpu: %"PRI_ld64, e->cpu);
2852 fprintf(stdout, " tid: %"PRI_ld64, e->tid);
2853 if (e2) {
2854 fprintf(stdout, " machine_pid: %"PRI_ld64, e2->machine_pid);
2855 fprintf(stdout, " vcpu: %"PRI_lu64"\n", e2->vcpu);
2856 } else {
2857 fprintf(stdout, "\n");
2858 }
2859 }
2860
2861 sid = evlist__id2sid(evlist, e->id);
2862 if (!sid)
2863 return -ENOENT;
2864
2865 sid->idx = e->idx;
2866 sid->cpu.cpu = e->cpu;
2867 sid->tid = e->tid;
2868
2869 if (!e2)
2870 continue;
2871
2872 sid->machine_pid = e2->machine_pid;
2873 sid->vcpu.cpu = e2->vcpu;
2874
2875 if (!sid->machine_pid)
2876 continue;
2877
2878 if (sid->machine_pid != last_pid) {
2879 ret = perf_session__register_guest(session, sid->machine_pid);
2880 if (ret)
2881 return ret;
2882 last_pid = sid->machine_pid;
2883 perf_guest = true;
2884 }
2885
2886 ret = perf_session__set_guest_cpu(session, sid->machine_pid, e->tid, e2->vcpu);
2887 if (ret)
2888 return ret;
2889 }
2890 return 0;
2891}
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 "tsc.h"
33#include "ui/progress.h"
34#include "../perf.h"
35#include "arch/common.h"
36#include "units.h"
37#include <internal/lib.h>
38
39#ifdef HAVE_ZSTD_SUPPORT
40static int perf_session__process_compressed_event(struct perf_session *session,
41 union perf_event *event, u64 file_offset)
42{
43 void *src;
44 size_t decomp_size, src_size;
45 u64 decomp_last_rem = 0;
46 size_t mmap_len, decomp_len = session->header.env.comp_mmap_len;
47 struct decomp *decomp, *decomp_last = session->decomp_last;
48
49 if (decomp_last) {
50 decomp_last_rem = decomp_last->size - decomp_last->head;
51 decomp_len += decomp_last_rem;
52 }
53
54 mmap_len = sizeof(struct decomp) + decomp_len;
55 decomp = mmap(NULL, mmap_len, PROT_READ|PROT_WRITE,
56 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
57 if (decomp == MAP_FAILED) {
58 pr_err("Couldn't allocate memory for decompression\n");
59 return -1;
60 }
61
62 decomp->file_pos = file_offset;
63 decomp->mmap_len = mmap_len;
64 decomp->head = 0;
65
66 if (decomp_last_rem) {
67 memcpy(decomp->data, &(decomp_last->data[decomp_last->head]), decomp_last_rem);
68 decomp->size = decomp_last_rem;
69 }
70
71 src = (void *)event + sizeof(struct perf_record_compressed);
72 src_size = event->pack.header.size - sizeof(struct perf_record_compressed);
73
74 decomp_size = zstd_decompress_stream(&(session->zstd_data), src, src_size,
75 &(decomp->data[decomp_last_rem]), decomp_len - decomp_last_rem);
76 if (!decomp_size) {
77 munmap(decomp, mmap_len);
78 pr_err("Couldn't decompress data\n");
79 return -1;
80 }
81
82 decomp->size += decomp_size;
83
84 if (session->decomp == NULL) {
85 session->decomp = decomp;
86 session->decomp_last = decomp;
87 } else {
88 session->decomp_last->next = decomp;
89 session->decomp_last = decomp;
90 }
91
92 pr_debug("decomp (B): %zd to %zd\n", src_size, decomp_size);
93
94 return 0;
95}
96#else /* !HAVE_ZSTD_SUPPORT */
97#define perf_session__process_compressed_event perf_session__process_compressed_event_stub
98#endif
99
100static int perf_session__deliver_event(struct perf_session *session,
101 union perf_event *event,
102 struct perf_tool *tool,
103 u64 file_offset);
104
105static int perf_session__open(struct perf_session *session)
106{
107 struct perf_data *data = session->data;
108
109 if (perf_session__read_header(session) < 0) {
110 pr_err("incompatible file format (rerun with -v to learn more)\n");
111 return -1;
112 }
113
114 if (perf_data__is_pipe(data))
115 return 0;
116
117 if (perf_header__has_feat(&session->header, HEADER_STAT))
118 return 0;
119
120 if (!evlist__valid_sample_type(session->evlist)) {
121 pr_err("non matching sample_type\n");
122 return -1;
123 }
124
125 if (!evlist__valid_sample_id_all(session->evlist)) {
126 pr_err("non matching sample_id_all\n");
127 return -1;
128 }
129
130 if (!evlist__valid_read_format(session->evlist)) {
131 pr_err("non matching read_format\n");
132 return -1;
133 }
134
135 return 0;
136}
137
138void perf_session__set_id_hdr_size(struct perf_session *session)
139{
140 u16 id_hdr_size = evlist__id_hdr_size(session->evlist);
141
142 machines__set_id_hdr_size(&session->machines, id_hdr_size);
143}
144
145int perf_session__create_kernel_maps(struct perf_session *session)
146{
147 int ret = machine__create_kernel_maps(&session->machines.host);
148
149 if (ret >= 0)
150 ret = machines__create_guest_kernel_maps(&session->machines);
151 return ret;
152}
153
154static void perf_session__destroy_kernel_maps(struct perf_session *session)
155{
156 machines__destroy_kernel_maps(&session->machines);
157}
158
159static bool perf_session__has_comm_exec(struct perf_session *session)
160{
161 struct evsel *evsel;
162
163 evlist__for_each_entry(session->evlist, evsel) {
164 if (evsel->core.attr.comm_exec)
165 return true;
166 }
167
168 return false;
169}
170
171static void perf_session__set_comm_exec(struct perf_session *session)
172{
173 bool comm_exec = perf_session__has_comm_exec(session);
174
175 machines__set_comm_exec(&session->machines, comm_exec);
176}
177
178static int ordered_events__deliver_event(struct ordered_events *oe,
179 struct ordered_event *event)
180{
181 struct perf_session *session = container_of(oe, struct perf_session,
182 ordered_events);
183
184 return perf_session__deliver_event(session, event->event,
185 session->tool, event->file_offset);
186}
187
188struct perf_session *perf_session__new(struct perf_data *data,
189 bool repipe, struct perf_tool *tool)
190{
191 int ret = -ENOMEM;
192 struct perf_session *session = zalloc(sizeof(*session));
193
194 if (!session)
195 goto out;
196
197 session->repipe = repipe;
198 session->tool = tool;
199 INIT_LIST_HEAD(&session->auxtrace_index);
200 machines__init(&session->machines);
201 ordered_events__init(&session->ordered_events,
202 ordered_events__deliver_event, NULL);
203
204 perf_env__init(&session->header.env);
205 if (data) {
206 ret = perf_data__open(data);
207 if (ret < 0)
208 goto out_delete;
209
210 session->data = data;
211
212 if (perf_data__is_read(data)) {
213 ret = perf_session__open(session);
214 if (ret < 0)
215 goto out_delete;
216
217 /*
218 * set session attributes that are present in perf.data
219 * but not in pipe-mode.
220 */
221 if (!data->is_pipe) {
222 perf_session__set_id_hdr_size(session);
223 perf_session__set_comm_exec(session);
224 }
225
226 evlist__init_trace_event_sample_raw(session->evlist);
227
228 /* Open the directory data. */
229 if (data->is_dir) {
230 ret = perf_data__open_dir(data);
231 if (ret)
232 goto out_delete;
233 }
234
235 if (!symbol_conf.kallsyms_name &&
236 !symbol_conf.vmlinux_name)
237 symbol_conf.kallsyms_name = perf_data__kallsyms_name(data);
238 }
239 } else {
240 session->machines.host.env = &perf_env;
241 }
242
243 session->machines.host.single_address_space =
244 perf_env__single_address_space(session->machines.host.env);
245
246 if (!data || perf_data__is_write(data)) {
247 /*
248 * In O_RDONLY mode this will be performed when reading the
249 * kernel MMAP event, in perf_event__process_mmap().
250 */
251 if (perf_session__create_kernel_maps(session) < 0)
252 pr_warning("Cannot read kernel map\n");
253 }
254
255 /*
256 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is
257 * processed, so evlist__sample_id_all is not meaningful here.
258 */
259 if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps &&
260 tool->ordered_events && !evlist__sample_id_all(session->evlist)) {
261 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
262 tool->ordered_events = false;
263 }
264
265 return session;
266
267 out_delete:
268 perf_session__delete(session);
269 out:
270 return ERR_PTR(ret);
271}
272
273static void perf_session__delete_threads(struct perf_session *session)
274{
275 machine__delete_threads(&session->machines.host);
276}
277
278static void perf_session__release_decomp_events(struct perf_session *session)
279{
280 struct decomp *next, *decomp;
281 size_t mmap_len;
282 next = session->decomp;
283 do {
284 decomp = next;
285 if (decomp == NULL)
286 break;
287 next = decomp->next;
288 mmap_len = decomp->mmap_len;
289 munmap(decomp, mmap_len);
290 } while (1);
291}
292
293void perf_session__delete(struct perf_session *session)
294{
295 if (session == NULL)
296 return;
297 auxtrace__free(session);
298 auxtrace_index__free(&session->auxtrace_index);
299 perf_session__destroy_kernel_maps(session);
300 perf_session__delete_threads(session);
301 perf_session__release_decomp_events(session);
302 perf_env__exit(&session->header.env);
303 machines__exit(&session->machines);
304 if (session->data) {
305 if (perf_data__is_read(session->data))
306 evlist__delete(session->evlist);
307 perf_data__close(session->data);
308 }
309 trace_event__cleanup(&session->tevent);
310 free(session);
311}
312
313static int process_event_synth_tracing_data_stub(struct perf_session *session
314 __maybe_unused,
315 union perf_event *event
316 __maybe_unused)
317{
318 dump_printf(": unhandled!\n");
319 return 0;
320}
321
322static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
323 union perf_event *event __maybe_unused,
324 struct evlist **pevlist
325 __maybe_unused)
326{
327 dump_printf(": unhandled!\n");
328 return 0;
329}
330
331static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused,
332 union perf_event *event __maybe_unused,
333 struct evlist **pevlist
334 __maybe_unused)
335{
336 if (dump_trace)
337 perf_event__fprintf_event_update(event, stdout);
338
339 dump_printf(": unhandled!\n");
340 return 0;
341}
342
343static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
344 union perf_event *event __maybe_unused,
345 struct perf_sample *sample __maybe_unused,
346 struct evsel *evsel __maybe_unused,
347 struct machine *machine __maybe_unused)
348{
349 dump_printf(": unhandled!\n");
350 return 0;
351}
352
353static int process_event_stub(struct perf_tool *tool __maybe_unused,
354 union perf_event *event __maybe_unused,
355 struct perf_sample *sample __maybe_unused,
356 struct machine *machine __maybe_unused)
357{
358 dump_printf(": unhandled!\n");
359 return 0;
360}
361
362static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
363 union perf_event *event __maybe_unused,
364 struct ordered_events *oe __maybe_unused)
365{
366 dump_printf(": unhandled!\n");
367 return 0;
368}
369
370static int process_finished_round(struct perf_tool *tool,
371 union perf_event *event,
372 struct ordered_events *oe);
373
374static int skipn(int fd, off_t n)
375{
376 char buf[4096];
377 ssize_t ret;
378
379 while (n > 0) {
380 ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
381 if (ret <= 0)
382 return ret;
383 n -= ret;
384 }
385
386 return 0;
387}
388
389static s64 process_event_auxtrace_stub(struct perf_session *session __maybe_unused,
390 union perf_event *event)
391{
392 dump_printf(": unhandled!\n");
393 if (perf_data__is_pipe(session->data))
394 skipn(perf_data__fd(session->data), event->auxtrace.size);
395 return event->auxtrace.size;
396}
397
398static int process_event_op2_stub(struct perf_session *session __maybe_unused,
399 union perf_event *event __maybe_unused)
400{
401 dump_printf(": unhandled!\n");
402 return 0;
403}
404
405
406static
407int process_event_thread_map_stub(struct perf_session *session __maybe_unused,
408 union perf_event *event __maybe_unused)
409{
410 if (dump_trace)
411 perf_event__fprintf_thread_map(event, stdout);
412
413 dump_printf(": unhandled!\n");
414 return 0;
415}
416
417static
418int process_event_cpu_map_stub(struct perf_session *session __maybe_unused,
419 union perf_event *event __maybe_unused)
420{
421 if (dump_trace)
422 perf_event__fprintf_cpu_map(event, stdout);
423
424 dump_printf(": unhandled!\n");
425 return 0;
426}
427
428static
429int process_event_stat_config_stub(struct perf_session *session __maybe_unused,
430 union perf_event *event __maybe_unused)
431{
432 if (dump_trace)
433 perf_event__fprintf_stat_config(event, stdout);
434
435 dump_printf(": unhandled!\n");
436 return 0;
437}
438
439static int process_stat_stub(struct perf_session *perf_session __maybe_unused,
440 union perf_event *event)
441{
442 if (dump_trace)
443 perf_event__fprintf_stat(event, stdout);
444
445 dump_printf(": unhandled!\n");
446 return 0;
447}
448
449static int process_stat_round_stub(struct perf_session *perf_session __maybe_unused,
450 union perf_event *event)
451{
452 if (dump_trace)
453 perf_event__fprintf_stat_round(event, stdout);
454
455 dump_printf(": unhandled!\n");
456 return 0;
457}
458
459static int process_event_time_conv_stub(struct perf_session *perf_session __maybe_unused,
460 union perf_event *event)
461{
462 if (dump_trace)
463 perf_event__fprintf_time_conv(event, stdout);
464
465 dump_printf(": unhandled!\n");
466 return 0;
467}
468
469static int perf_session__process_compressed_event_stub(struct perf_session *session __maybe_unused,
470 union perf_event *event __maybe_unused,
471 u64 file_offset __maybe_unused)
472{
473 dump_printf(": unhandled!\n");
474 return 0;
475}
476
477void perf_tool__fill_defaults(struct perf_tool *tool)
478{
479 if (tool->sample == NULL)
480 tool->sample = process_event_sample_stub;
481 if (tool->mmap == NULL)
482 tool->mmap = process_event_stub;
483 if (tool->mmap2 == NULL)
484 tool->mmap2 = process_event_stub;
485 if (tool->comm == NULL)
486 tool->comm = process_event_stub;
487 if (tool->namespaces == NULL)
488 tool->namespaces = process_event_stub;
489 if (tool->cgroup == NULL)
490 tool->cgroup = process_event_stub;
491 if (tool->fork == NULL)
492 tool->fork = process_event_stub;
493 if (tool->exit == NULL)
494 tool->exit = process_event_stub;
495 if (tool->lost == NULL)
496 tool->lost = perf_event__process_lost;
497 if (tool->lost_samples == NULL)
498 tool->lost_samples = perf_event__process_lost_samples;
499 if (tool->aux == NULL)
500 tool->aux = perf_event__process_aux;
501 if (tool->itrace_start == NULL)
502 tool->itrace_start = perf_event__process_itrace_start;
503 if (tool->context_switch == NULL)
504 tool->context_switch = perf_event__process_switch;
505 if (tool->ksymbol == NULL)
506 tool->ksymbol = perf_event__process_ksymbol;
507 if (tool->bpf == NULL)
508 tool->bpf = perf_event__process_bpf;
509 if (tool->text_poke == NULL)
510 tool->text_poke = perf_event__process_text_poke;
511 if (tool->read == NULL)
512 tool->read = process_event_sample_stub;
513 if (tool->throttle == NULL)
514 tool->throttle = process_event_stub;
515 if (tool->unthrottle == NULL)
516 tool->unthrottle = process_event_stub;
517 if (tool->attr == NULL)
518 tool->attr = process_event_synth_attr_stub;
519 if (tool->event_update == NULL)
520 tool->event_update = process_event_synth_event_update_stub;
521 if (tool->tracing_data == NULL)
522 tool->tracing_data = process_event_synth_tracing_data_stub;
523 if (tool->build_id == NULL)
524 tool->build_id = process_event_op2_stub;
525 if (tool->finished_round == NULL) {
526 if (tool->ordered_events)
527 tool->finished_round = process_finished_round;
528 else
529 tool->finished_round = process_finished_round_stub;
530 }
531 if (tool->id_index == NULL)
532 tool->id_index = process_event_op2_stub;
533 if (tool->auxtrace_info == NULL)
534 tool->auxtrace_info = process_event_op2_stub;
535 if (tool->auxtrace == NULL)
536 tool->auxtrace = process_event_auxtrace_stub;
537 if (tool->auxtrace_error == NULL)
538 tool->auxtrace_error = process_event_op2_stub;
539 if (tool->thread_map == NULL)
540 tool->thread_map = process_event_thread_map_stub;
541 if (tool->cpu_map == NULL)
542 tool->cpu_map = process_event_cpu_map_stub;
543 if (tool->stat_config == NULL)
544 tool->stat_config = process_event_stat_config_stub;
545 if (tool->stat == NULL)
546 tool->stat = process_stat_stub;
547 if (tool->stat_round == NULL)
548 tool->stat_round = process_stat_round_stub;
549 if (tool->time_conv == NULL)
550 tool->time_conv = process_event_time_conv_stub;
551 if (tool->feature == NULL)
552 tool->feature = process_event_op2_stub;
553 if (tool->compressed == NULL)
554 tool->compressed = perf_session__process_compressed_event;
555}
556
557static void swap_sample_id_all(union perf_event *event, void *data)
558{
559 void *end = (void *) event + event->header.size;
560 int size = end - data;
561
562 BUG_ON(size % sizeof(u64));
563 mem_bswap_64(data, size);
564}
565
566static void perf_event__all64_swap(union perf_event *event,
567 bool sample_id_all __maybe_unused)
568{
569 struct perf_event_header *hdr = &event->header;
570 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
571}
572
573static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
574{
575 event->comm.pid = bswap_32(event->comm.pid);
576 event->comm.tid = bswap_32(event->comm.tid);
577
578 if (sample_id_all) {
579 void *data = &event->comm.comm;
580
581 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
582 swap_sample_id_all(event, data);
583 }
584}
585
586static void perf_event__mmap_swap(union perf_event *event,
587 bool sample_id_all)
588{
589 event->mmap.pid = bswap_32(event->mmap.pid);
590 event->mmap.tid = bswap_32(event->mmap.tid);
591 event->mmap.start = bswap_64(event->mmap.start);
592 event->mmap.len = bswap_64(event->mmap.len);
593 event->mmap.pgoff = bswap_64(event->mmap.pgoff);
594
595 if (sample_id_all) {
596 void *data = &event->mmap.filename;
597
598 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
599 swap_sample_id_all(event, data);
600 }
601}
602
603static void perf_event__mmap2_swap(union perf_event *event,
604 bool sample_id_all)
605{
606 event->mmap2.pid = bswap_32(event->mmap2.pid);
607 event->mmap2.tid = bswap_32(event->mmap2.tid);
608 event->mmap2.start = bswap_64(event->mmap2.start);
609 event->mmap2.len = bswap_64(event->mmap2.len);
610 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
611
612 if (!(event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID)) {
613 event->mmap2.maj = bswap_32(event->mmap2.maj);
614 event->mmap2.min = bswap_32(event->mmap2.min);
615 event->mmap2.ino = bswap_64(event->mmap2.ino);
616 event->mmap2.ino_generation = bswap_64(event->mmap2.ino_generation);
617 }
618
619 if (sample_id_all) {
620 void *data = &event->mmap2.filename;
621
622 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
623 swap_sample_id_all(event, data);
624 }
625}
626static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
627{
628 event->fork.pid = bswap_32(event->fork.pid);
629 event->fork.tid = bswap_32(event->fork.tid);
630 event->fork.ppid = bswap_32(event->fork.ppid);
631 event->fork.ptid = bswap_32(event->fork.ptid);
632 event->fork.time = bswap_64(event->fork.time);
633
634 if (sample_id_all)
635 swap_sample_id_all(event, &event->fork + 1);
636}
637
638static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
639{
640 event->read.pid = bswap_32(event->read.pid);
641 event->read.tid = bswap_32(event->read.tid);
642 event->read.value = bswap_64(event->read.value);
643 event->read.time_enabled = bswap_64(event->read.time_enabled);
644 event->read.time_running = bswap_64(event->read.time_running);
645 event->read.id = bswap_64(event->read.id);
646
647 if (sample_id_all)
648 swap_sample_id_all(event, &event->read + 1);
649}
650
651static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
652{
653 event->aux.aux_offset = bswap_64(event->aux.aux_offset);
654 event->aux.aux_size = bswap_64(event->aux.aux_size);
655 event->aux.flags = bswap_64(event->aux.flags);
656
657 if (sample_id_all)
658 swap_sample_id_all(event, &event->aux + 1);
659}
660
661static void perf_event__itrace_start_swap(union perf_event *event,
662 bool sample_id_all)
663{
664 event->itrace_start.pid = bswap_32(event->itrace_start.pid);
665 event->itrace_start.tid = bswap_32(event->itrace_start.tid);
666
667 if (sample_id_all)
668 swap_sample_id_all(event, &event->itrace_start + 1);
669}
670
671static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
672{
673 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
674 event->context_switch.next_prev_pid =
675 bswap_32(event->context_switch.next_prev_pid);
676 event->context_switch.next_prev_tid =
677 bswap_32(event->context_switch.next_prev_tid);
678 }
679
680 if (sample_id_all)
681 swap_sample_id_all(event, &event->context_switch + 1);
682}
683
684static void perf_event__text_poke_swap(union perf_event *event, bool sample_id_all)
685{
686 event->text_poke.addr = bswap_64(event->text_poke.addr);
687 event->text_poke.old_len = bswap_16(event->text_poke.old_len);
688 event->text_poke.new_len = bswap_16(event->text_poke.new_len);
689
690 if (sample_id_all) {
691 size_t len = sizeof(event->text_poke.old_len) +
692 sizeof(event->text_poke.new_len) +
693 event->text_poke.old_len +
694 event->text_poke.new_len;
695 void *data = &event->text_poke.old_len;
696
697 data += PERF_ALIGN(len, sizeof(u64));
698 swap_sample_id_all(event, data);
699 }
700}
701
702static void perf_event__throttle_swap(union perf_event *event,
703 bool sample_id_all)
704{
705 event->throttle.time = bswap_64(event->throttle.time);
706 event->throttle.id = bswap_64(event->throttle.id);
707 event->throttle.stream_id = bswap_64(event->throttle.stream_id);
708
709 if (sample_id_all)
710 swap_sample_id_all(event, &event->throttle + 1);
711}
712
713static void perf_event__namespaces_swap(union perf_event *event,
714 bool sample_id_all)
715{
716 u64 i;
717
718 event->namespaces.pid = bswap_32(event->namespaces.pid);
719 event->namespaces.tid = bswap_32(event->namespaces.tid);
720 event->namespaces.nr_namespaces = bswap_64(event->namespaces.nr_namespaces);
721
722 for (i = 0; i < event->namespaces.nr_namespaces; i++) {
723 struct perf_ns_link_info *ns = &event->namespaces.link_info[i];
724
725 ns->dev = bswap_64(ns->dev);
726 ns->ino = bswap_64(ns->ino);
727 }
728
729 if (sample_id_all)
730 swap_sample_id_all(event, &event->namespaces.link_info[i]);
731}
732
733static void perf_event__cgroup_swap(union perf_event *event, bool sample_id_all)
734{
735 event->cgroup.id = bswap_64(event->cgroup.id);
736
737 if (sample_id_all) {
738 void *data = &event->cgroup.path;
739
740 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
741 swap_sample_id_all(event, data);
742 }
743}
744
745static u8 revbyte(u8 b)
746{
747 int rev = (b >> 4) | ((b & 0xf) << 4);
748 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
749 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
750 return (u8) rev;
751}
752
753/*
754 * XXX this is hack in attempt to carry flags bitfield
755 * through endian village. ABI says:
756 *
757 * Bit-fields are allocated from right to left (least to most significant)
758 * on little-endian implementations and from left to right (most to least
759 * significant) on big-endian implementations.
760 *
761 * The above seems to be byte specific, so we need to reverse each
762 * byte of the bitfield. 'Internet' also says this might be implementation
763 * specific and we probably need proper fix and carry perf_event_attr
764 * bitfield flags in separate data file FEAT_ section. Thought this seems
765 * to work for now.
766 */
767static void swap_bitfield(u8 *p, unsigned len)
768{
769 unsigned i;
770
771 for (i = 0; i < len; i++) {
772 *p = revbyte(*p);
773 p++;
774 }
775}
776
777/* exported for swapping attributes in file header */
778void perf_event__attr_swap(struct perf_event_attr *attr)
779{
780 attr->type = bswap_32(attr->type);
781 attr->size = bswap_32(attr->size);
782
783#define bswap_safe(f, n) \
784 (attr->size > (offsetof(struct perf_event_attr, f) + \
785 sizeof(attr->f) * (n)))
786#define bswap_field(f, sz) \
787do { \
788 if (bswap_safe(f, 0)) \
789 attr->f = bswap_##sz(attr->f); \
790} while(0)
791#define bswap_field_16(f) bswap_field(f, 16)
792#define bswap_field_32(f) bswap_field(f, 32)
793#define bswap_field_64(f) bswap_field(f, 64)
794
795 bswap_field_64(config);
796 bswap_field_64(sample_period);
797 bswap_field_64(sample_type);
798 bswap_field_64(read_format);
799 bswap_field_32(wakeup_events);
800 bswap_field_32(bp_type);
801 bswap_field_64(bp_addr);
802 bswap_field_64(bp_len);
803 bswap_field_64(branch_sample_type);
804 bswap_field_64(sample_regs_user);
805 bswap_field_32(sample_stack_user);
806 bswap_field_32(aux_watermark);
807 bswap_field_16(sample_max_stack);
808 bswap_field_32(aux_sample_size);
809
810 /*
811 * After read_format are bitfields. Check read_format because
812 * we are unable to use offsetof on bitfield.
813 */
814 if (bswap_safe(read_format, 1))
815 swap_bitfield((u8 *) (&attr->read_format + 1),
816 sizeof(u64));
817#undef bswap_field_64
818#undef bswap_field_32
819#undef bswap_field
820#undef bswap_safe
821}
822
823static void perf_event__hdr_attr_swap(union perf_event *event,
824 bool sample_id_all __maybe_unused)
825{
826 size_t size;
827
828 perf_event__attr_swap(&event->attr.attr);
829
830 size = event->header.size;
831 size -= (void *)&event->attr.id - (void *)event;
832 mem_bswap_64(event->attr.id, size);
833}
834
835static void perf_event__event_update_swap(union perf_event *event,
836 bool sample_id_all __maybe_unused)
837{
838 event->event_update.type = bswap_64(event->event_update.type);
839 event->event_update.id = bswap_64(event->event_update.id);
840}
841
842static void perf_event__event_type_swap(union perf_event *event,
843 bool sample_id_all __maybe_unused)
844{
845 event->event_type.event_type.event_id =
846 bswap_64(event->event_type.event_type.event_id);
847}
848
849static void perf_event__tracing_data_swap(union perf_event *event,
850 bool sample_id_all __maybe_unused)
851{
852 event->tracing_data.size = bswap_32(event->tracing_data.size);
853}
854
855static void perf_event__auxtrace_info_swap(union perf_event *event,
856 bool sample_id_all __maybe_unused)
857{
858 size_t size;
859
860 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
861
862 size = event->header.size;
863 size -= (void *)&event->auxtrace_info.priv - (void *)event;
864 mem_bswap_64(event->auxtrace_info.priv, size);
865}
866
867static void perf_event__auxtrace_swap(union perf_event *event,
868 bool sample_id_all __maybe_unused)
869{
870 event->auxtrace.size = bswap_64(event->auxtrace.size);
871 event->auxtrace.offset = bswap_64(event->auxtrace.offset);
872 event->auxtrace.reference = bswap_64(event->auxtrace.reference);
873 event->auxtrace.idx = bswap_32(event->auxtrace.idx);
874 event->auxtrace.tid = bswap_32(event->auxtrace.tid);
875 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu);
876}
877
878static void perf_event__auxtrace_error_swap(union perf_event *event,
879 bool sample_id_all __maybe_unused)
880{
881 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
882 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
883 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu);
884 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid);
885 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid);
886 event->auxtrace_error.fmt = bswap_32(event->auxtrace_error.fmt);
887 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip);
888 if (event->auxtrace_error.fmt)
889 event->auxtrace_error.time = bswap_64(event->auxtrace_error.time);
890}
891
892static void perf_event__thread_map_swap(union perf_event *event,
893 bool sample_id_all __maybe_unused)
894{
895 unsigned i;
896
897 event->thread_map.nr = bswap_64(event->thread_map.nr);
898
899 for (i = 0; i < event->thread_map.nr; i++)
900 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
901}
902
903static void perf_event__cpu_map_swap(union perf_event *event,
904 bool sample_id_all __maybe_unused)
905{
906 struct perf_record_cpu_map_data *data = &event->cpu_map.data;
907 struct cpu_map_entries *cpus;
908 struct perf_record_record_cpu_map *mask;
909 unsigned i;
910
911 data->type = bswap_16(data->type);
912
913 switch (data->type) {
914 case PERF_CPU_MAP__CPUS:
915 cpus = (struct cpu_map_entries *)data->data;
916
917 cpus->nr = bswap_16(cpus->nr);
918
919 for (i = 0; i < cpus->nr; i++)
920 cpus->cpu[i] = bswap_16(cpus->cpu[i]);
921 break;
922 case PERF_CPU_MAP__MASK:
923 mask = (struct perf_record_record_cpu_map *)data->data;
924
925 mask->nr = bswap_16(mask->nr);
926 mask->long_size = bswap_16(mask->long_size);
927
928 switch (mask->long_size) {
929 case 4: mem_bswap_32(&mask->mask, mask->nr); break;
930 case 8: mem_bswap_64(&mask->mask, mask->nr); break;
931 default:
932 pr_err("cpu_map swap: unsupported long size\n");
933 }
934 default:
935 break;
936 }
937}
938
939static void perf_event__stat_config_swap(union perf_event *event,
940 bool sample_id_all __maybe_unused)
941{
942 u64 size;
943
944 size = bswap_64(event->stat_config.nr) * sizeof(event->stat_config.data[0]);
945 size += 1; /* nr item itself */
946 mem_bswap_64(&event->stat_config.nr, size);
947}
948
949static void perf_event__stat_swap(union perf_event *event,
950 bool sample_id_all __maybe_unused)
951{
952 event->stat.id = bswap_64(event->stat.id);
953 event->stat.thread = bswap_32(event->stat.thread);
954 event->stat.cpu = bswap_32(event->stat.cpu);
955 event->stat.val = bswap_64(event->stat.val);
956 event->stat.ena = bswap_64(event->stat.ena);
957 event->stat.run = bswap_64(event->stat.run);
958}
959
960static void perf_event__stat_round_swap(union perf_event *event,
961 bool sample_id_all __maybe_unused)
962{
963 event->stat_round.type = bswap_64(event->stat_round.type);
964 event->stat_round.time = bswap_64(event->stat_round.time);
965}
966
967static void perf_event__time_conv_swap(union perf_event *event,
968 bool sample_id_all __maybe_unused)
969{
970 event->time_conv.time_shift = bswap_64(event->time_conv.time_shift);
971 event->time_conv.time_mult = bswap_64(event->time_conv.time_mult);
972 event->time_conv.time_zero = bswap_64(event->time_conv.time_zero);
973
974 if (event_contains(event->time_conv, time_cycles)) {
975 event->time_conv.time_cycles = bswap_64(event->time_conv.time_cycles);
976 event->time_conv.time_mask = bswap_64(event->time_conv.time_mask);
977 }
978}
979
980typedef void (*perf_event__swap_op)(union perf_event *event,
981 bool sample_id_all);
982
983static perf_event__swap_op perf_event__swap_ops[] = {
984 [PERF_RECORD_MMAP] = perf_event__mmap_swap,
985 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap,
986 [PERF_RECORD_COMM] = perf_event__comm_swap,
987 [PERF_RECORD_FORK] = perf_event__task_swap,
988 [PERF_RECORD_EXIT] = perf_event__task_swap,
989 [PERF_RECORD_LOST] = perf_event__all64_swap,
990 [PERF_RECORD_READ] = perf_event__read_swap,
991 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap,
992 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap,
993 [PERF_RECORD_SAMPLE] = perf_event__all64_swap,
994 [PERF_RECORD_AUX] = perf_event__aux_swap,
995 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap,
996 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap,
997 [PERF_RECORD_SWITCH] = perf_event__switch_swap,
998 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap,
999 [PERF_RECORD_NAMESPACES] = perf_event__namespaces_swap,
1000 [PERF_RECORD_CGROUP] = perf_event__cgroup_swap,
1001 [PERF_RECORD_TEXT_POKE] = perf_event__text_poke_swap,
1002 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
1003 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
1004 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
1005 [PERF_RECORD_HEADER_BUILD_ID] = NULL,
1006 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap,
1007 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap,
1008 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap,
1009 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap,
1010 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap,
1011 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap,
1012 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap,
1013 [PERF_RECORD_STAT] = perf_event__stat_swap,
1014 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap,
1015 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap,
1016 [PERF_RECORD_TIME_CONV] = perf_event__time_conv_swap,
1017 [PERF_RECORD_HEADER_MAX] = NULL,
1018};
1019
1020/*
1021 * When perf record finishes a pass on every buffers, it records this pseudo
1022 * event.
1023 * We record the max timestamp t found in the pass n.
1024 * Assuming these timestamps are monotonic across cpus, we know that if
1025 * a buffer still has events with timestamps below t, they will be all
1026 * available and then read in the pass n + 1.
1027 * Hence when we start to read the pass n + 2, we can safely flush every
1028 * events with timestamps below t.
1029 *
1030 * ============ PASS n =================
1031 * CPU 0 | CPU 1
1032 * |
1033 * cnt1 timestamps | cnt2 timestamps
1034 * 1 | 2
1035 * 2 | 3
1036 * - | 4 <--- max recorded
1037 *
1038 * ============ PASS n + 1 ==============
1039 * CPU 0 | CPU 1
1040 * |
1041 * cnt1 timestamps | cnt2 timestamps
1042 * 3 | 5
1043 * 4 | 6
1044 * 5 | 7 <---- max recorded
1045 *
1046 * Flush every events below timestamp 4
1047 *
1048 * ============ PASS n + 2 ==============
1049 * CPU 0 | CPU 1
1050 * |
1051 * cnt1 timestamps | cnt2 timestamps
1052 * 6 | 8
1053 * 7 | 9
1054 * - | 10
1055 *
1056 * Flush every events below timestamp 7
1057 * etc...
1058 */
1059static int process_finished_round(struct perf_tool *tool __maybe_unused,
1060 union perf_event *event __maybe_unused,
1061 struct ordered_events *oe)
1062{
1063 if (dump_trace)
1064 fprintf(stdout, "\n");
1065 return ordered_events__flush(oe, OE_FLUSH__ROUND);
1066}
1067
1068int perf_session__queue_event(struct perf_session *s, union perf_event *event,
1069 u64 timestamp, u64 file_offset)
1070{
1071 return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset);
1072}
1073
1074static void callchain__lbr_callstack_printf(struct perf_sample *sample)
1075{
1076 struct ip_callchain *callchain = sample->callchain;
1077 struct branch_stack *lbr_stack = sample->branch_stack;
1078 struct branch_entry *entries = perf_sample__branch_entries(sample);
1079 u64 kernel_callchain_nr = callchain->nr;
1080 unsigned int i;
1081
1082 for (i = 0; i < kernel_callchain_nr; i++) {
1083 if (callchain->ips[i] == PERF_CONTEXT_USER)
1084 break;
1085 }
1086
1087 if ((i != kernel_callchain_nr) && lbr_stack->nr) {
1088 u64 total_nr;
1089 /*
1090 * LBR callstack can only get user call chain,
1091 * i is kernel call chain number,
1092 * 1 is PERF_CONTEXT_USER.
1093 *
1094 * The user call chain is stored in LBR registers.
1095 * LBR are pair registers. The caller is stored
1096 * in "from" register, while the callee is stored
1097 * in "to" register.
1098 * For example, there is a call stack
1099 * "A"->"B"->"C"->"D".
1100 * The LBR registers will be recorded like
1101 * "C"->"D", "B"->"C", "A"->"B".
1102 * So only the first "to" register and all "from"
1103 * registers are needed to construct the whole stack.
1104 */
1105 total_nr = i + 1 + lbr_stack->nr + 1;
1106 kernel_callchain_nr = i + 1;
1107
1108 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
1109
1110 for (i = 0; i < kernel_callchain_nr; i++)
1111 printf("..... %2d: %016" PRIx64 "\n",
1112 i, callchain->ips[i]);
1113
1114 printf("..... %2d: %016" PRIx64 "\n",
1115 (int)(kernel_callchain_nr), entries[0].to);
1116 for (i = 0; i < lbr_stack->nr; i++)
1117 printf("..... %2d: %016" PRIx64 "\n",
1118 (int)(i + kernel_callchain_nr + 1), entries[i].from);
1119 }
1120}
1121
1122static void callchain__printf(struct evsel *evsel,
1123 struct perf_sample *sample)
1124{
1125 unsigned int i;
1126 struct ip_callchain *callchain = sample->callchain;
1127
1128 if (evsel__has_branch_callstack(evsel))
1129 callchain__lbr_callstack_printf(sample);
1130
1131 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
1132
1133 for (i = 0; i < callchain->nr; i++)
1134 printf("..... %2d: %016" PRIx64 "\n",
1135 i, callchain->ips[i]);
1136}
1137
1138static void branch_stack__printf(struct perf_sample *sample, bool callstack)
1139{
1140 struct branch_entry *entries = perf_sample__branch_entries(sample);
1141 uint64_t i;
1142
1143 printf("%s: nr:%" PRIu64 "\n",
1144 !callstack ? "... branch stack" : "... branch callstack",
1145 sample->branch_stack->nr);
1146
1147 for (i = 0; i < sample->branch_stack->nr; i++) {
1148 struct branch_entry *e = &entries[i];
1149
1150 if (!callstack) {
1151 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n",
1152 i, e->from, e->to,
1153 (unsigned short)e->flags.cycles,
1154 e->flags.mispred ? "M" : " ",
1155 e->flags.predicted ? "P" : " ",
1156 e->flags.abort ? "A" : " ",
1157 e->flags.in_tx ? "T" : " ",
1158 (unsigned)e->flags.reserved);
1159 } else {
1160 printf("..... %2"PRIu64": %016" PRIx64 "\n",
1161 i, i > 0 ? e->from : e->to);
1162 }
1163 }
1164}
1165
1166static void regs_dump__printf(u64 mask, u64 *regs)
1167{
1168 unsigned rid, i = 0;
1169
1170 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
1171 u64 val = regs[i++];
1172
1173 printf(".... %-5s 0x%016" PRIx64 "\n",
1174 perf_reg_name(rid), val);
1175 }
1176}
1177
1178static const char *regs_abi[] = {
1179 [PERF_SAMPLE_REGS_ABI_NONE] = "none",
1180 [PERF_SAMPLE_REGS_ABI_32] = "32-bit",
1181 [PERF_SAMPLE_REGS_ABI_64] = "64-bit",
1182};
1183
1184static inline const char *regs_dump_abi(struct regs_dump *d)
1185{
1186 if (d->abi > PERF_SAMPLE_REGS_ABI_64)
1187 return "unknown";
1188
1189 return regs_abi[d->abi];
1190}
1191
1192static void regs__printf(const char *type, struct regs_dump *regs)
1193{
1194 u64 mask = regs->mask;
1195
1196 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
1197 type,
1198 mask,
1199 regs_dump_abi(regs));
1200
1201 regs_dump__printf(mask, regs->regs);
1202}
1203
1204static void regs_user__printf(struct perf_sample *sample)
1205{
1206 struct regs_dump *user_regs = &sample->user_regs;
1207
1208 if (user_regs->regs)
1209 regs__printf("user", user_regs);
1210}
1211
1212static void regs_intr__printf(struct perf_sample *sample)
1213{
1214 struct regs_dump *intr_regs = &sample->intr_regs;
1215
1216 if (intr_regs->regs)
1217 regs__printf("intr", intr_regs);
1218}
1219
1220static void stack_user__printf(struct stack_dump *dump)
1221{
1222 printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
1223 dump->size, dump->offset);
1224}
1225
1226static void evlist__print_tstamp(struct evlist *evlist, union perf_event *event, struct perf_sample *sample)
1227{
1228 u64 sample_type = __evlist__combined_sample_type(evlist);
1229
1230 if (event->header.type != PERF_RECORD_SAMPLE &&
1231 !evlist__sample_id_all(evlist)) {
1232 fputs("-1 -1 ", stdout);
1233 return;
1234 }
1235
1236 if ((sample_type & PERF_SAMPLE_CPU))
1237 printf("%u ", sample->cpu);
1238
1239 if (sample_type & PERF_SAMPLE_TIME)
1240 printf("%" PRIu64 " ", sample->time);
1241}
1242
1243static void sample_read__printf(struct perf_sample *sample, u64 read_format)
1244{
1245 printf("... sample_read:\n");
1246
1247 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1248 printf("...... time enabled %016" PRIx64 "\n",
1249 sample->read.time_enabled);
1250
1251 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1252 printf("...... time running %016" PRIx64 "\n",
1253 sample->read.time_running);
1254
1255 if (read_format & PERF_FORMAT_GROUP) {
1256 u64 i;
1257
1258 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
1259
1260 for (i = 0; i < sample->read.group.nr; i++) {
1261 struct sample_read_value *value;
1262
1263 value = &sample->read.group.values[i];
1264 printf("..... id %016" PRIx64
1265 ", value %016" PRIx64 "\n",
1266 value->id, value->value);
1267 }
1268 } else
1269 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
1270 sample->read.one.id, sample->read.one.value);
1271}
1272
1273static void dump_event(struct evlist *evlist, union perf_event *event,
1274 u64 file_offset, struct perf_sample *sample)
1275{
1276 if (!dump_trace)
1277 return;
1278
1279 printf("\n%#" PRIx64 " [%#x]: event: %d\n",
1280 file_offset, event->header.size, event->header.type);
1281
1282 trace_event(event);
1283 if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw)
1284 evlist->trace_event_sample_raw(evlist, event, sample);
1285
1286 if (sample)
1287 evlist__print_tstamp(evlist, event, sample);
1288
1289 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
1290 event->header.size, perf_event__name(event->header.type));
1291}
1292
1293char *get_page_size_name(u64 size, char *str)
1294{
1295 if (!size || !unit_number__scnprintf(str, PAGE_SIZE_NAME_LEN, size))
1296 snprintf(str, PAGE_SIZE_NAME_LEN, "%s", "N/A");
1297
1298 return str;
1299}
1300
1301static void dump_sample(struct evsel *evsel, union perf_event *event,
1302 struct perf_sample *sample)
1303{
1304 u64 sample_type;
1305 char str[PAGE_SIZE_NAME_LEN];
1306
1307 if (!dump_trace)
1308 return;
1309
1310 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
1311 event->header.misc, sample->pid, sample->tid, sample->ip,
1312 sample->period, sample->addr);
1313
1314 sample_type = evsel->core.attr.sample_type;
1315
1316 if (evsel__has_callchain(evsel))
1317 callchain__printf(evsel, sample);
1318
1319 if (evsel__has_br_stack(evsel))
1320 branch_stack__printf(sample, evsel__has_branch_callstack(evsel));
1321
1322 if (sample_type & PERF_SAMPLE_REGS_USER)
1323 regs_user__printf(sample);
1324
1325 if (sample_type & PERF_SAMPLE_REGS_INTR)
1326 regs_intr__printf(sample);
1327
1328 if (sample_type & PERF_SAMPLE_STACK_USER)
1329 stack_user__printf(&sample->user_stack);
1330
1331 if (sample_type & PERF_SAMPLE_WEIGHT_TYPE) {
1332 printf("... weight: %" PRIu64 "", sample->weight);
1333 if (sample_type & PERF_SAMPLE_WEIGHT_STRUCT) {
1334 printf(",0x%"PRIx16"", sample->ins_lat);
1335 printf(",0x%"PRIx16"", sample->p_stage_cyc);
1336 }
1337 printf("\n");
1338 }
1339
1340 if (sample_type & PERF_SAMPLE_DATA_SRC)
1341 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
1342
1343 if (sample_type & PERF_SAMPLE_PHYS_ADDR)
1344 printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr);
1345
1346 if (sample_type & PERF_SAMPLE_DATA_PAGE_SIZE)
1347 printf(" .. data page size: %s\n", get_page_size_name(sample->data_page_size, str));
1348
1349 if (sample_type & PERF_SAMPLE_CODE_PAGE_SIZE)
1350 printf(" .. code page size: %s\n", get_page_size_name(sample->code_page_size, str));
1351
1352 if (sample_type & PERF_SAMPLE_TRANSACTION)
1353 printf("... transaction: %" PRIx64 "\n", sample->transaction);
1354
1355 if (sample_type & PERF_SAMPLE_READ)
1356 sample_read__printf(sample, evsel->core.attr.read_format);
1357}
1358
1359static void dump_read(struct evsel *evsel, union perf_event *event)
1360{
1361 struct perf_record_read *read_event = &event->read;
1362 u64 read_format;
1363
1364 if (!dump_trace)
1365 return;
1366
1367 printf(": %d %d %s %" PRI_lu64 "\n", event->read.pid, event->read.tid,
1368 evsel__name(evsel), event->read.value);
1369
1370 if (!evsel)
1371 return;
1372
1373 read_format = evsel->core.attr.read_format;
1374
1375 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1376 printf("... time enabled : %" PRI_lu64 "\n", read_event->time_enabled);
1377
1378 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1379 printf("... time running : %" PRI_lu64 "\n", read_event->time_running);
1380
1381 if (read_format & PERF_FORMAT_ID)
1382 printf("... id : %" PRI_lu64 "\n", read_event->id);
1383}
1384
1385static struct machine *machines__find_for_cpumode(struct machines *machines,
1386 union perf_event *event,
1387 struct perf_sample *sample)
1388{
1389 if (perf_guest &&
1390 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1391 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1392 u32 pid;
1393
1394 if (event->header.type == PERF_RECORD_MMAP
1395 || event->header.type == PERF_RECORD_MMAP2)
1396 pid = event->mmap.pid;
1397 else
1398 pid = sample->pid;
1399
1400 return machines__find_guest(machines, pid);
1401 }
1402
1403 return &machines->host;
1404}
1405
1406static int deliver_sample_value(struct evlist *evlist,
1407 struct perf_tool *tool,
1408 union perf_event *event,
1409 struct perf_sample *sample,
1410 struct sample_read_value *v,
1411 struct machine *machine)
1412{
1413 struct perf_sample_id *sid = evlist__id2sid(evlist, v->id);
1414 struct evsel *evsel;
1415
1416 if (sid) {
1417 sample->id = v->id;
1418 sample->period = v->value - sid->period;
1419 sid->period = v->value;
1420 }
1421
1422 if (!sid || sid->evsel == NULL) {
1423 ++evlist->stats.nr_unknown_id;
1424 return 0;
1425 }
1426
1427 /*
1428 * There's no reason to deliver sample
1429 * for zero period, bail out.
1430 */
1431 if (!sample->period)
1432 return 0;
1433
1434 evsel = container_of(sid->evsel, struct evsel, core);
1435 return tool->sample(tool, event, sample, evsel, machine);
1436}
1437
1438static int deliver_sample_group(struct evlist *evlist,
1439 struct perf_tool *tool,
1440 union perf_event *event,
1441 struct perf_sample *sample,
1442 struct machine *machine)
1443{
1444 int ret = -EINVAL;
1445 u64 i;
1446
1447 for (i = 0; i < sample->read.group.nr; i++) {
1448 ret = deliver_sample_value(evlist, tool, event, sample,
1449 &sample->read.group.values[i],
1450 machine);
1451 if (ret)
1452 break;
1453 }
1454
1455 return ret;
1456}
1457
1458static int evlist__deliver_sample(struct evlist *evlist, struct perf_tool *tool,
1459 union perf_event *event, struct perf_sample *sample,
1460 struct evsel *evsel, struct machine *machine)
1461{
1462 /* We know evsel != NULL. */
1463 u64 sample_type = evsel->core.attr.sample_type;
1464 u64 read_format = evsel->core.attr.read_format;
1465
1466 /* Standard sample delivery. */
1467 if (!(sample_type & PERF_SAMPLE_READ))
1468 return tool->sample(tool, event, sample, evsel, machine);
1469
1470 /* For PERF_SAMPLE_READ we have either single or group mode. */
1471 if (read_format & PERF_FORMAT_GROUP)
1472 return deliver_sample_group(evlist, tool, event, sample,
1473 machine);
1474 else
1475 return deliver_sample_value(evlist, tool, event, sample,
1476 &sample->read.one, machine);
1477}
1478
1479static int machines__deliver_event(struct machines *machines,
1480 struct evlist *evlist,
1481 union perf_event *event,
1482 struct perf_sample *sample,
1483 struct perf_tool *tool, u64 file_offset)
1484{
1485 struct evsel *evsel;
1486 struct machine *machine;
1487
1488 dump_event(evlist, event, file_offset, sample);
1489
1490 evsel = evlist__id2evsel(evlist, sample->id);
1491
1492 machine = machines__find_for_cpumode(machines, event, sample);
1493
1494 switch (event->header.type) {
1495 case PERF_RECORD_SAMPLE:
1496 if (evsel == NULL) {
1497 ++evlist->stats.nr_unknown_id;
1498 return 0;
1499 }
1500 dump_sample(evsel, event, sample);
1501 if (machine == NULL) {
1502 ++evlist->stats.nr_unprocessable_samples;
1503 return 0;
1504 }
1505 return evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1506 case PERF_RECORD_MMAP:
1507 return tool->mmap(tool, event, sample, machine);
1508 case PERF_RECORD_MMAP2:
1509 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1510 ++evlist->stats.nr_proc_map_timeout;
1511 return tool->mmap2(tool, event, sample, machine);
1512 case PERF_RECORD_COMM:
1513 return tool->comm(tool, event, sample, machine);
1514 case PERF_RECORD_NAMESPACES:
1515 return tool->namespaces(tool, event, sample, machine);
1516 case PERF_RECORD_CGROUP:
1517 return tool->cgroup(tool, event, sample, machine);
1518 case PERF_RECORD_FORK:
1519 return tool->fork(tool, event, sample, machine);
1520 case PERF_RECORD_EXIT:
1521 return tool->exit(tool, event, sample, machine);
1522 case PERF_RECORD_LOST:
1523 if (tool->lost == perf_event__process_lost)
1524 evlist->stats.total_lost += event->lost.lost;
1525 return tool->lost(tool, event, sample, machine);
1526 case PERF_RECORD_LOST_SAMPLES:
1527 if (tool->lost_samples == perf_event__process_lost_samples)
1528 evlist->stats.total_lost_samples += event->lost_samples.lost;
1529 return tool->lost_samples(tool, event, sample, machine);
1530 case PERF_RECORD_READ:
1531 dump_read(evsel, event);
1532 return tool->read(tool, event, sample, evsel, machine);
1533 case PERF_RECORD_THROTTLE:
1534 return tool->throttle(tool, event, sample, machine);
1535 case PERF_RECORD_UNTHROTTLE:
1536 return tool->unthrottle(tool, event, sample, machine);
1537 case PERF_RECORD_AUX:
1538 if (tool->aux == perf_event__process_aux) {
1539 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED)
1540 evlist->stats.total_aux_lost += 1;
1541 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL)
1542 evlist->stats.total_aux_partial += 1;
1543 }
1544 return tool->aux(tool, event, sample, machine);
1545 case PERF_RECORD_ITRACE_START:
1546 return tool->itrace_start(tool, event, sample, machine);
1547 case PERF_RECORD_SWITCH:
1548 case PERF_RECORD_SWITCH_CPU_WIDE:
1549 return tool->context_switch(tool, event, sample, machine);
1550 case PERF_RECORD_KSYMBOL:
1551 return tool->ksymbol(tool, event, sample, machine);
1552 case PERF_RECORD_BPF_EVENT:
1553 return tool->bpf(tool, event, sample, machine);
1554 case PERF_RECORD_TEXT_POKE:
1555 return tool->text_poke(tool, event, sample, machine);
1556 default:
1557 ++evlist->stats.nr_unknown_events;
1558 return -1;
1559 }
1560}
1561
1562static int perf_session__deliver_event(struct perf_session *session,
1563 union perf_event *event,
1564 struct perf_tool *tool,
1565 u64 file_offset)
1566{
1567 struct perf_sample sample;
1568 int ret = evlist__parse_sample(session->evlist, event, &sample);
1569
1570 if (ret) {
1571 pr_err("Can't parse sample, err = %d\n", ret);
1572 return ret;
1573 }
1574
1575 ret = auxtrace__process_event(session, event, &sample, tool);
1576 if (ret < 0)
1577 return ret;
1578 if (ret > 0)
1579 return 0;
1580
1581 ret = machines__deliver_event(&session->machines, session->evlist,
1582 event, &sample, tool, file_offset);
1583
1584 if (dump_trace && sample.aux_sample.size)
1585 auxtrace__dump_auxtrace_sample(session, &sample);
1586
1587 return ret;
1588}
1589
1590static s64 perf_session__process_user_event(struct perf_session *session,
1591 union perf_event *event,
1592 u64 file_offset)
1593{
1594 struct ordered_events *oe = &session->ordered_events;
1595 struct perf_tool *tool = session->tool;
1596 struct perf_sample sample = { .time = 0, };
1597 int fd = perf_data__fd(session->data);
1598 int err;
1599
1600 if (event->header.type != PERF_RECORD_COMPRESSED ||
1601 tool->compressed == perf_session__process_compressed_event_stub)
1602 dump_event(session->evlist, event, file_offset, &sample);
1603
1604 /* These events are processed right away */
1605 switch (event->header.type) {
1606 case PERF_RECORD_HEADER_ATTR:
1607 err = tool->attr(tool, event, &session->evlist);
1608 if (err == 0) {
1609 perf_session__set_id_hdr_size(session);
1610 perf_session__set_comm_exec(session);
1611 }
1612 return err;
1613 case PERF_RECORD_EVENT_UPDATE:
1614 return tool->event_update(tool, event, &session->evlist);
1615 case PERF_RECORD_HEADER_EVENT_TYPE:
1616 /*
1617 * Deprecated, but we need to handle it for sake
1618 * of old data files create in pipe mode.
1619 */
1620 return 0;
1621 case PERF_RECORD_HEADER_TRACING_DATA:
1622 /*
1623 * Setup for reading amidst mmap, but only when we
1624 * are in 'file' mode. The 'pipe' fd is in proper
1625 * place already.
1626 */
1627 if (!perf_data__is_pipe(session->data))
1628 lseek(fd, file_offset, SEEK_SET);
1629 return tool->tracing_data(session, event);
1630 case PERF_RECORD_HEADER_BUILD_ID:
1631 return tool->build_id(session, event);
1632 case PERF_RECORD_FINISHED_ROUND:
1633 return tool->finished_round(tool, event, oe);
1634 case PERF_RECORD_ID_INDEX:
1635 return tool->id_index(session, event);
1636 case PERF_RECORD_AUXTRACE_INFO:
1637 return tool->auxtrace_info(session, event);
1638 case PERF_RECORD_AUXTRACE:
1639 /* setup for reading amidst mmap */
1640 lseek(fd, file_offset + event->header.size, SEEK_SET);
1641 return tool->auxtrace(session, event);
1642 case PERF_RECORD_AUXTRACE_ERROR:
1643 perf_session__auxtrace_error_inc(session, event);
1644 return tool->auxtrace_error(session, event);
1645 case PERF_RECORD_THREAD_MAP:
1646 return tool->thread_map(session, event);
1647 case PERF_RECORD_CPU_MAP:
1648 return tool->cpu_map(session, event);
1649 case PERF_RECORD_STAT_CONFIG:
1650 return tool->stat_config(session, event);
1651 case PERF_RECORD_STAT:
1652 return tool->stat(session, event);
1653 case PERF_RECORD_STAT_ROUND:
1654 return tool->stat_round(session, event);
1655 case PERF_RECORD_TIME_CONV:
1656 session->time_conv = event->time_conv;
1657 return tool->time_conv(session, event);
1658 case PERF_RECORD_HEADER_FEATURE:
1659 return tool->feature(session, event);
1660 case PERF_RECORD_COMPRESSED:
1661 err = tool->compressed(session, event, file_offset);
1662 if (err)
1663 dump_event(session->evlist, event, file_offset, &sample);
1664 return err;
1665 default:
1666 return -EINVAL;
1667 }
1668}
1669
1670int perf_session__deliver_synth_event(struct perf_session *session,
1671 union perf_event *event,
1672 struct perf_sample *sample)
1673{
1674 struct evlist *evlist = session->evlist;
1675 struct perf_tool *tool = session->tool;
1676
1677 events_stats__inc(&evlist->stats, event->header.type);
1678
1679 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1680 return perf_session__process_user_event(session, event, 0);
1681
1682 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0);
1683}
1684
1685static void event_swap(union perf_event *event, bool sample_id_all)
1686{
1687 perf_event__swap_op swap;
1688
1689 swap = perf_event__swap_ops[event->header.type];
1690 if (swap)
1691 swap(event, sample_id_all);
1692}
1693
1694int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1695 void *buf, size_t buf_sz,
1696 union perf_event **event_ptr,
1697 struct perf_sample *sample)
1698{
1699 union perf_event *event;
1700 size_t hdr_sz, rest;
1701 int fd;
1702
1703 if (session->one_mmap && !session->header.needs_swap) {
1704 event = file_offset - session->one_mmap_offset +
1705 session->one_mmap_addr;
1706 goto out_parse_sample;
1707 }
1708
1709 if (perf_data__is_pipe(session->data))
1710 return -1;
1711
1712 fd = perf_data__fd(session->data);
1713 hdr_sz = sizeof(struct perf_event_header);
1714
1715 if (buf_sz < hdr_sz)
1716 return -1;
1717
1718 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1719 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1720 return -1;
1721
1722 event = (union perf_event *)buf;
1723
1724 if (session->header.needs_swap)
1725 perf_event_header__bswap(&event->header);
1726
1727 if (event->header.size < hdr_sz || event->header.size > buf_sz)
1728 return -1;
1729
1730 buf += hdr_sz;
1731 rest = event->header.size - hdr_sz;
1732
1733 if (readn(fd, buf, rest) != (ssize_t)rest)
1734 return -1;
1735
1736 if (session->header.needs_swap)
1737 event_swap(event, evlist__sample_id_all(session->evlist));
1738
1739out_parse_sample:
1740
1741 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1742 evlist__parse_sample(session->evlist, event, sample))
1743 return -1;
1744
1745 *event_ptr = event;
1746
1747 return 0;
1748}
1749
1750int perf_session__peek_events(struct perf_session *session, u64 offset,
1751 u64 size, peek_events_cb_t cb, void *data)
1752{
1753 u64 max_offset = offset + size;
1754 char buf[PERF_SAMPLE_MAX_SIZE];
1755 union perf_event *event;
1756 int err;
1757
1758 do {
1759 err = perf_session__peek_event(session, offset, buf,
1760 PERF_SAMPLE_MAX_SIZE, &event,
1761 NULL);
1762 if (err)
1763 return err;
1764
1765 err = cb(session, event, offset, data);
1766 if (err)
1767 return err;
1768
1769 offset += event->header.size;
1770 if (event->header.type == PERF_RECORD_AUXTRACE)
1771 offset += event->auxtrace.size;
1772
1773 } while (offset < max_offset);
1774
1775 return err;
1776}
1777
1778static s64 perf_session__process_event(struct perf_session *session,
1779 union perf_event *event, u64 file_offset)
1780{
1781 struct evlist *evlist = session->evlist;
1782 struct perf_tool *tool = session->tool;
1783 int ret;
1784
1785 if (session->header.needs_swap)
1786 event_swap(event, evlist__sample_id_all(evlist));
1787
1788 if (event->header.type >= PERF_RECORD_HEADER_MAX)
1789 return -EINVAL;
1790
1791 events_stats__inc(&evlist->stats, event->header.type);
1792
1793 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1794 return perf_session__process_user_event(session, event, file_offset);
1795
1796 if (tool->ordered_events) {
1797 u64 timestamp = -1ULL;
1798
1799 ret = evlist__parse_sample_timestamp(evlist, event, ×tamp);
1800 if (ret && ret != -1)
1801 return ret;
1802
1803 ret = perf_session__queue_event(session, event, timestamp, file_offset);
1804 if (ret != -ETIME)
1805 return ret;
1806 }
1807
1808 return perf_session__deliver_event(session, event, tool, file_offset);
1809}
1810
1811void perf_event_header__bswap(struct perf_event_header *hdr)
1812{
1813 hdr->type = bswap_32(hdr->type);
1814 hdr->misc = bswap_16(hdr->misc);
1815 hdr->size = bswap_16(hdr->size);
1816}
1817
1818struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1819{
1820 return machine__findnew_thread(&session->machines.host, -1, pid);
1821}
1822
1823int perf_session__register_idle_thread(struct perf_session *session)
1824{
1825 struct thread *thread = machine__idle_thread(&session->machines.host);
1826
1827 /* machine__idle_thread() got the thread, so put it */
1828 thread__put(thread);
1829 return thread ? 0 : -1;
1830}
1831
1832static void
1833perf_session__warn_order(const struct perf_session *session)
1834{
1835 const struct ordered_events *oe = &session->ordered_events;
1836 struct evsel *evsel;
1837 bool should_warn = true;
1838
1839 evlist__for_each_entry(session->evlist, evsel) {
1840 if (evsel->core.attr.write_backward)
1841 should_warn = false;
1842 }
1843
1844 if (!should_warn)
1845 return;
1846 if (oe->nr_unordered_events != 0)
1847 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1848}
1849
1850static void perf_session__warn_about_errors(const struct perf_session *session)
1851{
1852 const struct events_stats *stats = &session->evlist->stats;
1853
1854 if (session->tool->lost == perf_event__process_lost &&
1855 stats->nr_events[PERF_RECORD_LOST] != 0) {
1856 ui__warning("Processed %d events and lost %d chunks!\n\n"
1857 "Check IO/CPU overload!\n\n",
1858 stats->nr_events[0],
1859 stats->nr_events[PERF_RECORD_LOST]);
1860 }
1861
1862 if (session->tool->lost_samples == perf_event__process_lost_samples) {
1863 double drop_rate;
1864
1865 drop_rate = (double)stats->total_lost_samples /
1866 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1867 if (drop_rate > 0.05) {
1868 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n",
1869 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1870 drop_rate * 100.0);
1871 }
1872 }
1873
1874 if (session->tool->aux == perf_event__process_aux &&
1875 stats->total_aux_lost != 0) {
1876 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1877 stats->total_aux_lost,
1878 stats->nr_events[PERF_RECORD_AUX]);
1879 }
1880
1881 if (session->tool->aux == perf_event__process_aux &&
1882 stats->total_aux_partial != 0) {
1883 bool vmm_exclusive = false;
1884
1885 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive",
1886 &vmm_exclusive);
1887
1888 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n"
1889 "Are you running a KVM guest in the background?%s\n\n",
1890 stats->total_aux_partial,
1891 stats->nr_events[PERF_RECORD_AUX],
1892 vmm_exclusive ?
1893 "\nReloading kvm_intel module with vmm_exclusive=0\n"
1894 "will reduce the gaps to only guest's timeslices." :
1895 "");
1896 }
1897
1898 if (stats->nr_unknown_events != 0) {
1899 ui__warning("Found %u unknown events!\n\n"
1900 "Is this an older tool processing a perf.data "
1901 "file generated by a more recent tool?\n\n"
1902 "If that is not the case, consider "
1903 "reporting to linux-kernel@vger.kernel.org.\n\n",
1904 stats->nr_unknown_events);
1905 }
1906
1907 if (stats->nr_unknown_id != 0) {
1908 ui__warning("%u samples with id not present in the header\n",
1909 stats->nr_unknown_id);
1910 }
1911
1912 if (stats->nr_invalid_chains != 0) {
1913 ui__warning("Found invalid callchains!\n\n"
1914 "%u out of %u events were discarded for this reason.\n\n"
1915 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1916 stats->nr_invalid_chains,
1917 stats->nr_events[PERF_RECORD_SAMPLE]);
1918 }
1919
1920 if (stats->nr_unprocessable_samples != 0) {
1921 ui__warning("%u unprocessable samples recorded.\n"
1922 "Do you have a KVM guest running and not using 'perf kvm'?\n",
1923 stats->nr_unprocessable_samples);
1924 }
1925
1926 perf_session__warn_order(session);
1927
1928 events_stats__auxtrace_error_warn(stats);
1929
1930 if (stats->nr_proc_map_timeout != 0) {
1931 ui__warning("%d map information files for pre-existing threads were\n"
1932 "not processed, if there are samples for addresses they\n"
1933 "will not be resolved, you may find out which are these\n"
1934 "threads by running with -v and redirecting the output\n"
1935 "to a file.\n"
1936 "The time limit to process proc map is too short?\n"
1937 "Increase it by --proc-map-timeout\n",
1938 stats->nr_proc_map_timeout);
1939 }
1940}
1941
1942static int perf_session__flush_thread_stack(struct thread *thread,
1943 void *p __maybe_unused)
1944{
1945 return thread_stack__flush(thread);
1946}
1947
1948static int perf_session__flush_thread_stacks(struct perf_session *session)
1949{
1950 return machines__for_each_thread(&session->machines,
1951 perf_session__flush_thread_stack,
1952 NULL);
1953}
1954
1955volatile int session_done;
1956
1957static int __perf_session__process_decomp_events(struct perf_session *session);
1958
1959static int __perf_session__process_pipe_events(struct perf_session *session)
1960{
1961 struct ordered_events *oe = &session->ordered_events;
1962 struct perf_tool *tool = session->tool;
1963 union perf_event *event;
1964 uint32_t size, cur_size = 0;
1965 void *buf = NULL;
1966 s64 skip = 0;
1967 u64 head;
1968 ssize_t err;
1969 void *p;
1970
1971 perf_tool__fill_defaults(tool);
1972
1973 head = 0;
1974 cur_size = sizeof(union perf_event);
1975
1976 buf = malloc(cur_size);
1977 if (!buf)
1978 return -errno;
1979 ordered_events__set_copy_on_queue(oe, true);
1980more:
1981 event = buf;
1982 err = perf_data__read(session->data, event,
1983 sizeof(struct perf_event_header));
1984 if (err <= 0) {
1985 if (err == 0)
1986 goto done;
1987
1988 pr_err("failed to read event header\n");
1989 goto out_err;
1990 }
1991
1992 if (session->header.needs_swap)
1993 perf_event_header__bswap(&event->header);
1994
1995 size = event->header.size;
1996 if (size < sizeof(struct perf_event_header)) {
1997 pr_err("bad event header size\n");
1998 goto out_err;
1999 }
2000
2001 if (size > cur_size) {
2002 void *new = realloc(buf, size);
2003 if (!new) {
2004 pr_err("failed to allocate memory to read event\n");
2005 goto out_err;
2006 }
2007 buf = new;
2008 cur_size = size;
2009 event = buf;
2010 }
2011 p = event;
2012 p += sizeof(struct perf_event_header);
2013
2014 if (size - sizeof(struct perf_event_header)) {
2015 err = perf_data__read(session->data, p,
2016 size - sizeof(struct perf_event_header));
2017 if (err <= 0) {
2018 if (err == 0) {
2019 pr_err("unexpected end of event stream\n");
2020 goto done;
2021 }
2022
2023 pr_err("failed to read event data\n");
2024 goto out_err;
2025 }
2026 }
2027
2028 if ((skip = perf_session__process_event(session, event, head)) < 0) {
2029 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
2030 head, event->header.size, event->header.type);
2031 err = -EINVAL;
2032 goto out_err;
2033 }
2034
2035 head += size;
2036
2037 if (skip > 0)
2038 head += skip;
2039
2040 err = __perf_session__process_decomp_events(session);
2041 if (err)
2042 goto out_err;
2043
2044 if (!session_done())
2045 goto more;
2046done:
2047 /* do the final flush for ordered samples */
2048 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
2049 if (err)
2050 goto out_err;
2051 err = auxtrace__flush_events(session, tool);
2052 if (err)
2053 goto out_err;
2054 err = perf_session__flush_thread_stacks(session);
2055out_err:
2056 free(buf);
2057 if (!tool->no_warn)
2058 perf_session__warn_about_errors(session);
2059 ordered_events__free(&session->ordered_events);
2060 auxtrace__free_events(session);
2061 return err;
2062}
2063
2064static union perf_event *
2065prefetch_event(char *buf, u64 head, size_t mmap_size,
2066 bool needs_swap, union perf_event *error)
2067{
2068 union perf_event *event;
2069
2070 /*
2071 * Ensure we have enough space remaining to read
2072 * the size of the event in the headers.
2073 */
2074 if (head + sizeof(event->header) > mmap_size)
2075 return NULL;
2076
2077 event = (union perf_event *)(buf + head);
2078 if (needs_swap)
2079 perf_event_header__bswap(&event->header);
2080
2081 if (head + event->header.size <= mmap_size)
2082 return event;
2083
2084 /* We're not fetching the event so swap back again */
2085 if (needs_swap)
2086 perf_event_header__bswap(&event->header);
2087
2088 pr_debug("%s: head=%#" PRIx64 " event->header_size=%#x, mmap_size=%#zx:"
2089 " fuzzed or compressed perf.data?\n",__func__, head, event->header.size, mmap_size);
2090
2091 return error;
2092}
2093
2094static union perf_event *
2095fetch_mmaped_event(u64 head, size_t mmap_size, char *buf, bool needs_swap)
2096{
2097 return prefetch_event(buf, head, mmap_size, needs_swap, ERR_PTR(-EINVAL));
2098}
2099
2100static union perf_event *
2101fetch_decomp_event(u64 head, size_t mmap_size, char *buf, bool needs_swap)
2102{
2103 return prefetch_event(buf, head, mmap_size, needs_swap, NULL);
2104}
2105
2106static int __perf_session__process_decomp_events(struct perf_session *session)
2107{
2108 s64 skip;
2109 u64 size, file_pos = 0;
2110 struct decomp *decomp = session->decomp_last;
2111
2112 if (!decomp)
2113 return 0;
2114
2115 while (decomp->head < decomp->size && !session_done()) {
2116 union perf_event *event = fetch_decomp_event(decomp->head, decomp->size, decomp->data,
2117 session->header.needs_swap);
2118
2119 if (!event)
2120 break;
2121
2122 size = event->header.size;
2123
2124 if (size < sizeof(struct perf_event_header) ||
2125 (skip = perf_session__process_event(session, event, file_pos)) < 0) {
2126 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
2127 decomp->file_pos + decomp->head, event->header.size, event->header.type);
2128 return -EINVAL;
2129 }
2130
2131 if (skip)
2132 size += skip;
2133
2134 decomp->head += size;
2135 }
2136
2137 return 0;
2138}
2139
2140/*
2141 * On 64bit we can mmap the data file in one go. No need for tiny mmap
2142 * slices. On 32bit we use 32MB.
2143 */
2144#if BITS_PER_LONG == 64
2145#define MMAP_SIZE ULLONG_MAX
2146#define NUM_MMAPS 1
2147#else
2148#define MMAP_SIZE (32 * 1024 * 1024ULL)
2149#define NUM_MMAPS 128
2150#endif
2151
2152struct reader;
2153
2154typedef s64 (*reader_cb_t)(struct perf_session *session,
2155 union perf_event *event,
2156 u64 file_offset);
2157
2158struct reader {
2159 int fd;
2160 u64 data_size;
2161 u64 data_offset;
2162 reader_cb_t process;
2163 bool in_place_update;
2164};
2165
2166static int
2167reader__process_events(struct reader *rd, struct perf_session *session,
2168 struct ui_progress *prog)
2169{
2170 u64 data_size = rd->data_size;
2171 u64 head, page_offset, file_offset, file_pos, size;
2172 int err = 0, mmap_prot, mmap_flags, map_idx = 0;
2173 size_t mmap_size;
2174 char *buf, *mmaps[NUM_MMAPS];
2175 union perf_event *event;
2176 s64 skip;
2177
2178 page_offset = page_size * (rd->data_offset / page_size);
2179 file_offset = page_offset;
2180 head = rd->data_offset - page_offset;
2181
2182 ui_progress__init_size(prog, data_size, "Processing events...");
2183
2184 data_size += rd->data_offset;
2185
2186 mmap_size = MMAP_SIZE;
2187 if (mmap_size > data_size) {
2188 mmap_size = data_size;
2189 session->one_mmap = true;
2190 }
2191
2192 memset(mmaps, 0, sizeof(mmaps));
2193
2194 mmap_prot = PROT_READ;
2195 mmap_flags = MAP_SHARED;
2196
2197 if (rd->in_place_update) {
2198 mmap_prot |= PROT_WRITE;
2199 } else if (session->header.needs_swap) {
2200 mmap_prot |= PROT_WRITE;
2201 mmap_flags = MAP_PRIVATE;
2202 }
2203remap:
2204 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, rd->fd,
2205 file_offset);
2206 if (buf == MAP_FAILED) {
2207 pr_err("failed to mmap file\n");
2208 err = -errno;
2209 goto out;
2210 }
2211 mmaps[map_idx] = buf;
2212 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
2213 file_pos = file_offset + head;
2214 if (session->one_mmap) {
2215 session->one_mmap_addr = buf;
2216 session->one_mmap_offset = file_offset;
2217 }
2218
2219more:
2220 event = fetch_mmaped_event(head, mmap_size, buf, session->header.needs_swap);
2221 if (IS_ERR(event))
2222 return PTR_ERR(event);
2223
2224 if (!event) {
2225 if (mmaps[map_idx]) {
2226 munmap(mmaps[map_idx], mmap_size);
2227 mmaps[map_idx] = NULL;
2228 }
2229
2230 page_offset = page_size * (head / page_size);
2231 file_offset += page_offset;
2232 head -= page_offset;
2233 goto remap;
2234 }
2235
2236 size = event->header.size;
2237
2238 skip = -EINVAL;
2239
2240 if (size < sizeof(struct perf_event_header) ||
2241 (skip = rd->process(session, event, file_pos)) < 0) {
2242 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n",
2243 file_offset + head, event->header.size,
2244 event->header.type, strerror(-skip));
2245 err = skip;
2246 goto out;
2247 }
2248
2249 if (skip)
2250 size += skip;
2251
2252 head += size;
2253 file_pos += size;
2254
2255 err = __perf_session__process_decomp_events(session);
2256 if (err)
2257 goto out;
2258
2259 ui_progress__update(prog, size);
2260
2261 if (session_done())
2262 goto out;
2263
2264 if (file_pos < data_size)
2265 goto more;
2266
2267out:
2268 return err;
2269}
2270
2271static s64 process_simple(struct perf_session *session,
2272 union perf_event *event,
2273 u64 file_offset)
2274{
2275 return perf_session__process_event(session, event, file_offset);
2276}
2277
2278static int __perf_session__process_events(struct perf_session *session)
2279{
2280 struct reader rd = {
2281 .fd = perf_data__fd(session->data),
2282 .data_size = session->header.data_size,
2283 .data_offset = session->header.data_offset,
2284 .process = process_simple,
2285 .in_place_update = session->data->in_place_update,
2286 };
2287 struct ordered_events *oe = &session->ordered_events;
2288 struct perf_tool *tool = session->tool;
2289 struct ui_progress prog;
2290 int err;
2291
2292 perf_tool__fill_defaults(tool);
2293
2294 if (rd.data_size == 0)
2295 return -1;
2296
2297 ui_progress__init_size(&prog, rd.data_size, "Processing events...");
2298
2299 err = reader__process_events(&rd, session, &prog);
2300 if (err)
2301 goto out_err;
2302 /* do the final flush for ordered samples */
2303 err = ordered_events__flush(oe, OE_FLUSH__FINAL);
2304 if (err)
2305 goto out_err;
2306 err = auxtrace__flush_events(session, tool);
2307 if (err)
2308 goto out_err;
2309 err = perf_session__flush_thread_stacks(session);
2310out_err:
2311 ui_progress__finish();
2312 if (!tool->no_warn)
2313 perf_session__warn_about_errors(session);
2314 /*
2315 * We may switching perf.data output, make ordered_events
2316 * reusable.
2317 */
2318 ordered_events__reinit(&session->ordered_events);
2319 auxtrace__free_events(session);
2320 session->one_mmap = false;
2321 return err;
2322}
2323
2324int perf_session__process_events(struct perf_session *session)
2325{
2326 if (perf_session__register_idle_thread(session) < 0)
2327 return -ENOMEM;
2328
2329 if (perf_data__is_pipe(session->data))
2330 return __perf_session__process_pipe_events(session);
2331
2332 return __perf_session__process_events(session);
2333}
2334
2335bool perf_session__has_traces(struct perf_session *session, const char *msg)
2336{
2337 struct evsel *evsel;
2338
2339 evlist__for_each_entry(session->evlist, evsel) {
2340 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT)
2341 return true;
2342 }
2343
2344 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
2345 return false;
2346}
2347
2348int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr)
2349{
2350 char *bracket;
2351 struct ref_reloc_sym *ref;
2352 struct kmap *kmap;
2353
2354 ref = zalloc(sizeof(struct ref_reloc_sym));
2355 if (ref == NULL)
2356 return -ENOMEM;
2357
2358 ref->name = strdup(symbol_name);
2359 if (ref->name == NULL) {
2360 free(ref);
2361 return -ENOMEM;
2362 }
2363
2364 bracket = strchr(ref->name, ']');
2365 if (bracket)
2366 *bracket = '\0';
2367
2368 ref->addr = addr;
2369
2370 kmap = map__kmap(map);
2371 if (kmap)
2372 kmap->ref_reloc_sym = ref;
2373
2374 return 0;
2375}
2376
2377size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
2378{
2379 return machines__fprintf_dsos(&session->machines, fp);
2380}
2381
2382size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
2383 bool (skip)(struct dso *dso, int parm), int parm)
2384{
2385 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
2386}
2387
2388size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp,
2389 bool skip_empty)
2390{
2391 size_t ret;
2392 const char *msg = "";
2393
2394 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
2395 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
2396
2397 ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
2398
2399 ret += events_stats__fprintf(&session->evlist->stats, fp, skip_empty);
2400 return ret;
2401}
2402
2403size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
2404{
2405 /*
2406 * FIXME: Here we have to actually print all the machines in this
2407 * session, not just the host...
2408 */
2409 return machine__fprintf(&session->machines.host, fp);
2410}
2411
2412struct evsel *perf_session__find_first_evtype(struct perf_session *session,
2413 unsigned int type)
2414{
2415 struct evsel *pos;
2416
2417 evlist__for_each_entry(session->evlist, pos) {
2418 if (pos->core.attr.type == type)
2419 return pos;
2420 }
2421 return NULL;
2422}
2423
2424int perf_session__cpu_bitmap(struct perf_session *session,
2425 const char *cpu_list, unsigned long *cpu_bitmap)
2426{
2427 int i, err = -1;
2428 struct perf_cpu_map *map;
2429 int nr_cpus = min(session->header.env.nr_cpus_avail, MAX_NR_CPUS);
2430
2431 for (i = 0; i < PERF_TYPE_MAX; ++i) {
2432 struct evsel *evsel;
2433
2434 evsel = perf_session__find_first_evtype(session, i);
2435 if (!evsel)
2436 continue;
2437
2438 if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CPU)) {
2439 pr_err("File does not contain CPU events. "
2440 "Remove -C option to proceed.\n");
2441 return -1;
2442 }
2443 }
2444
2445 map = perf_cpu_map__new(cpu_list);
2446 if (map == NULL) {
2447 pr_err("Invalid cpu_list\n");
2448 return -1;
2449 }
2450
2451 for (i = 0; i < map->nr; i++) {
2452 int cpu = map->map[i];
2453
2454 if (cpu >= nr_cpus) {
2455 pr_err("Requested CPU %d too large. "
2456 "Consider raising MAX_NR_CPUS\n", cpu);
2457 goto out_delete_map;
2458 }
2459
2460 set_bit(cpu, cpu_bitmap);
2461 }
2462
2463 err = 0;
2464
2465out_delete_map:
2466 perf_cpu_map__put(map);
2467 return err;
2468}
2469
2470void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
2471 bool full)
2472{
2473 if (session == NULL || fp == NULL)
2474 return;
2475
2476 fprintf(fp, "# ========\n");
2477 perf_header__fprintf_info(session, fp, full);
2478 fprintf(fp, "# ========\n#\n");
2479}
2480
2481int perf_event__process_id_index(struct perf_session *session,
2482 union perf_event *event)
2483{
2484 struct evlist *evlist = session->evlist;
2485 struct perf_record_id_index *ie = &event->id_index;
2486 size_t i, nr, max_nr;
2487
2488 max_nr = (ie->header.size - sizeof(struct perf_record_id_index)) /
2489 sizeof(struct id_index_entry);
2490 nr = ie->nr;
2491 if (nr > max_nr)
2492 return -EINVAL;
2493
2494 if (dump_trace)
2495 fprintf(stdout, " nr: %zu\n", nr);
2496
2497 for (i = 0; i < nr; i++) {
2498 struct id_index_entry *e = &ie->entries[i];
2499 struct perf_sample_id *sid;
2500
2501 if (dump_trace) {
2502 fprintf(stdout, " ... id: %"PRI_lu64, e->id);
2503 fprintf(stdout, " idx: %"PRI_lu64, e->idx);
2504 fprintf(stdout, " cpu: %"PRI_ld64, e->cpu);
2505 fprintf(stdout, " tid: %"PRI_ld64"\n", e->tid);
2506 }
2507
2508 sid = evlist__id2sid(evlist, e->id);
2509 if (!sid)
2510 return -ENOENT;
2511 sid->idx = e->idx;
2512 sid->cpu = e->cpu;
2513 sid->tid = e->tid;
2514 }
2515 return 0;
2516}