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