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7#include <inttypes.h>
8#include <sys/types.h>
9#include <sys/mman.h>
10#include <stdbool.h>
11#include <string.h>
12#include <limits.h>
13#include <errno.h>
14
15#include <linux/kernel.h>
16#include <linux/perf_event.h>
17#include <linux/types.h>
18#include <linux/bitops.h>
19#include <linux/log2.h>
20#include <linux/string.h>
21#include <linux/time64.h>
22
23#include <sys/param.h>
24#include <stdlib.h>
25#include <stdio.h>
26#include <linux/list.h>
27#include <linux/zalloc.h>
28
29#include "evlist.h"
30#include "dso.h"
31#include "map.h"
32#include "pmu.h"
33#include "evsel.h"
34#include "evsel_config.h"
35#include "symbol.h"
36#include "util/perf_api_probe.h"
37#include "util/synthetic-events.h"
38#include "thread_map.h"
39#include "asm/bug.h"
40#include "auxtrace.h"
41
42#include <linux/hash.h>
43
44#include "event.h"
45#include "record.h"
46#include "session.h"
47#include "debug.h"
48#include <subcmd/parse-options.h>
49
50#include "cs-etm.h"
51#include "intel-pt.h"
52#include "intel-bts.h"
53#include "arm-spe.h"
54#include "s390-cpumsf.h"
55#include "util/mmap.h"
56
57#include <linux/ctype.h>
58#include "symbol/kallsyms.h"
59#include <internal/lib.h>
60
61
62
63
64
65static int evlist__regroup(struct evlist *evlist, struct evsel *leader, struct evsel *last)
66{
67 struct evsel *evsel;
68 bool grp;
69
70 if (!evsel__is_group_leader(leader))
71 return -EINVAL;
72
73 grp = false;
74 evlist__for_each_entry(evlist, evsel) {
75 if (grp) {
76 if (!(evsel__leader(evsel) == leader ||
77 (evsel__leader(evsel) == evsel &&
78 evsel->core.nr_members <= 1)))
79 return -EINVAL;
80 } else if (evsel == leader) {
81 grp = true;
82 }
83 if (evsel == last)
84 break;
85 }
86
87 grp = false;
88 evlist__for_each_entry(evlist, evsel) {
89 if (grp) {
90 if (!evsel__has_leader(evsel, leader)) {
91 evsel__set_leader(evsel, leader);
92 if (leader->core.nr_members < 1)
93 leader->core.nr_members = 1;
94 leader->core.nr_members += 1;
95 }
96 } else if (evsel == leader) {
97 grp = true;
98 }
99 if (evsel == last)
100 break;
101 }
102
103 return 0;
104}
105
106static bool auxtrace__dont_decode(struct perf_session *session)
107{
108 return !session->itrace_synth_opts ||
109 session->itrace_synth_opts->dont_decode;
110}
111
112int auxtrace_mmap__mmap(struct auxtrace_mmap *mm,
113 struct auxtrace_mmap_params *mp,
114 void *userpg, int fd)
115{
116 struct perf_event_mmap_page *pc = userpg;
117
118 WARN_ONCE(mm->base, "Uninitialized auxtrace_mmap\n");
119
120 mm->userpg = userpg;
121 mm->mask = mp->mask;
122 mm->len = mp->len;
123 mm->prev = 0;
124 mm->idx = mp->idx;
125 mm->tid = mp->tid;
126 mm->cpu = mp->cpu;
127
128 if (!mp->len) {
129 mm->base = NULL;
130 return 0;
131 }
132
133#if BITS_PER_LONG != 64 && !defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
134 pr_err("Cannot use AUX area tracing mmaps\n");
135 return -1;
136#endif
137
138 pc->aux_offset = mp->offset;
139 pc->aux_size = mp->len;
140
141 mm->base = mmap(NULL, mp->len, mp->prot, MAP_SHARED, fd, mp->offset);
142 if (mm->base == MAP_FAILED) {
143 pr_debug2("failed to mmap AUX area\n");
144 mm->base = NULL;
145 return -1;
146 }
147
148 return 0;
149}
150
151void auxtrace_mmap__munmap(struct auxtrace_mmap *mm)
152{
153 if (mm->base) {
154 munmap(mm->base, mm->len);
155 mm->base = NULL;
156 }
157}
158
159void auxtrace_mmap_params__init(struct auxtrace_mmap_params *mp,
160 off_t auxtrace_offset,
161 unsigned int auxtrace_pages,
162 bool auxtrace_overwrite)
163{
164 if (auxtrace_pages) {
165 mp->offset = auxtrace_offset;
166 mp->len = auxtrace_pages * (size_t)page_size;
167 mp->mask = is_power_of_2(mp->len) ? mp->len - 1 : 0;
168 mp->prot = PROT_READ | (auxtrace_overwrite ? 0 : PROT_WRITE);
169 pr_debug2("AUX area mmap length %zu\n", mp->len);
170 } else {
171 mp->len = 0;
172 }
173}
174
175void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp,
176 struct evlist *evlist, int idx,
177 bool per_cpu)
178{
179 mp->idx = idx;
180
181 if (per_cpu) {
182 mp->cpu = evlist->core.cpus->map[idx];
183 if (evlist->core.threads)
184 mp->tid = perf_thread_map__pid(evlist->core.threads, 0);
185 else
186 mp->tid = -1;
187 } else {
188 mp->cpu = -1;
189 mp->tid = perf_thread_map__pid(evlist->core.threads, idx);
190 }
191}
192
193#define AUXTRACE_INIT_NR_QUEUES 32
194
195static struct auxtrace_queue *auxtrace_alloc_queue_array(unsigned int nr_queues)
196{
197 struct auxtrace_queue *queue_array;
198 unsigned int max_nr_queues, i;
199
200 max_nr_queues = UINT_MAX / sizeof(struct auxtrace_queue);
201 if (nr_queues > max_nr_queues)
202 return NULL;
203
204 queue_array = calloc(nr_queues, sizeof(struct auxtrace_queue));
205 if (!queue_array)
206 return NULL;
207
208 for (i = 0; i < nr_queues; i++) {
209 INIT_LIST_HEAD(&queue_array[i].head);
210 queue_array[i].priv = NULL;
211 }
212
213 return queue_array;
214}
215
216int auxtrace_queues__init(struct auxtrace_queues *queues)
217{
218 queues->nr_queues = AUXTRACE_INIT_NR_QUEUES;
219 queues->queue_array = auxtrace_alloc_queue_array(queues->nr_queues);
220 if (!queues->queue_array)
221 return -ENOMEM;
222 return 0;
223}
224
225static int auxtrace_queues__grow(struct auxtrace_queues *queues,
226 unsigned int new_nr_queues)
227{
228 unsigned int nr_queues = queues->nr_queues;
229 struct auxtrace_queue *queue_array;
230 unsigned int i;
231
232 if (!nr_queues)
233 nr_queues = AUXTRACE_INIT_NR_QUEUES;
234
235 while (nr_queues && nr_queues < new_nr_queues)
236 nr_queues <<= 1;
237
238 if (nr_queues < queues->nr_queues || nr_queues < new_nr_queues)
239 return -EINVAL;
240
241 queue_array = auxtrace_alloc_queue_array(nr_queues);
242 if (!queue_array)
243 return -ENOMEM;
244
245 for (i = 0; i < queues->nr_queues; i++) {
246 list_splice_tail(&queues->queue_array[i].head,
247 &queue_array[i].head);
248 queue_array[i].tid = queues->queue_array[i].tid;
249 queue_array[i].cpu = queues->queue_array[i].cpu;
250 queue_array[i].set = queues->queue_array[i].set;
251 queue_array[i].priv = queues->queue_array[i].priv;
252 }
253
254 queues->nr_queues = nr_queues;
255 queues->queue_array = queue_array;
256
257 return 0;
258}
259
260static void *auxtrace_copy_data(u64 size, struct perf_session *session)
261{
262 int fd = perf_data__fd(session->data);
263 void *p;
264 ssize_t ret;
265
266 if (size > SSIZE_MAX)
267 return NULL;
268
269 p = malloc(size);
270 if (!p)
271 return NULL;
272
273 ret = readn(fd, p, size);
274 if (ret != (ssize_t)size) {
275 free(p);
276 return NULL;
277 }
278
279 return p;
280}
281
282static int auxtrace_queues__queue_buffer(struct auxtrace_queues *queues,
283 unsigned int idx,
284 struct auxtrace_buffer *buffer)
285{
286 struct auxtrace_queue *queue;
287 int err;
288
289 if (idx >= queues->nr_queues) {
290 err = auxtrace_queues__grow(queues, idx + 1);
291 if (err)
292 return err;
293 }
294
295 queue = &queues->queue_array[idx];
296
297 if (!queue->set) {
298 queue->set = true;
299 queue->tid = buffer->tid;
300 queue->cpu = buffer->cpu;
301 }
302
303 buffer->buffer_nr = queues->next_buffer_nr++;
304
305 list_add_tail(&buffer->list, &queue->head);
306
307 queues->new_data = true;
308 queues->populated = true;
309
310 return 0;
311}
312
313
314#define BUFFER_LIMIT_FOR_32_BIT (32 * 1024 * 1024)
315
316static int auxtrace_queues__split_buffer(struct auxtrace_queues *queues,
317 unsigned int idx,
318 struct auxtrace_buffer *buffer)
319{
320 u64 sz = buffer->size;
321 bool consecutive = false;
322 struct auxtrace_buffer *b;
323 int err;
324
325 while (sz > BUFFER_LIMIT_FOR_32_BIT) {
326 b = memdup(buffer, sizeof(struct auxtrace_buffer));
327 if (!b)
328 return -ENOMEM;
329 b->size = BUFFER_LIMIT_FOR_32_BIT;
330 b->consecutive = consecutive;
331 err = auxtrace_queues__queue_buffer(queues, idx, b);
332 if (err) {
333 auxtrace_buffer__free(b);
334 return err;
335 }
336 buffer->data_offset += BUFFER_LIMIT_FOR_32_BIT;
337 sz -= BUFFER_LIMIT_FOR_32_BIT;
338 consecutive = true;
339 }
340
341 buffer->size = sz;
342 buffer->consecutive = consecutive;
343
344 return 0;
345}
346
347static bool filter_cpu(struct perf_session *session, int cpu)
348{
349 unsigned long *cpu_bitmap = session->itrace_synth_opts->cpu_bitmap;
350
351 return cpu_bitmap && cpu != -1 && !test_bit(cpu, cpu_bitmap);
352}
353
354static int auxtrace_queues__add_buffer(struct auxtrace_queues *queues,
355 struct perf_session *session,
356 unsigned int idx,
357 struct auxtrace_buffer *buffer,
358 struct auxtrace_buffer **buffer_ptr)
359{
360 int err = -ENOMEM;
361
362 if (filter_cpu(session, buffer->cpu))
363 return 0;
364
365 buffer = memdup(buffer, sizeof(*buffer));
366 if (!buffer)
367 return -ENOMEM;
368
369 if (session->one_mmap) {
370 buffer->data = buffer->data_offset - session->one_mmap_offset +
371 session->one_mmap_addr;
372 } else if (perf_data__is_pipe(session->data)) {
373 buffer->data = auxtrace_copy_data(buffer->size, session);
374 if (!buffer->data)
375 goto out_free;
376 buffer->data_needs_freeing = true;
377 } else if (BITS_PER_LONG == 32 &&
378 buffer->size > BUFFER_LIMIT_FOR_32_BIT) {
379 err = auxtrace_queues__split_buffer(queues, idx, buffer);
380 if (err)
381 goto out_free;
382 }
383
384 err = auxtrace_queues__queue_buffer(queues, idx, buffer);
385 if (err)
386 goto out_free;
387
388
389 if (buffer_ptr)
390 *buffer_ptr = buffer;
391
392 return 0;
393
394out_free:
395 auxtrace_buffer__free(buffer);
396 return err;
397}
398
399int auxtrace_queues__add_event(struct auxtrace_queues *queues,
400 struct perf_session *session,
401 union perf_event *event, off_t data_offset,
402 struct auxtrace_buffer **buffer_ptr)
403{
404 struct auxtrace_buffer buffer = {
405 .pid = -1,
406 .tid = event->auxtrace.tid,
407 .cpu = event->auxtrace.cpu,
408 .data_offset = data_offset,
409 .offset = event->auxtrace.offset,
410 .reference = event->auxtrace.reference,
411 .size = event->auxtrace.size,
412 };
413 unsigned int idx = event->auxtrace.idx;
414
415 return auxtrace_queues__add_buffer(queues, session, idx, &buffer,
416 buffer_ptr);
417}
418
419static int auxtrace_queues__add_indexed_event(struct auxtrace_queues *queues,
420 struct perf_session *session,
421 off_t file_offset, size_t sz)
422{
423 union perf_event *event;
424 int err;
425 char buf[PERF_SAMPLE_MAX_SIZE];
426
427 err = perf_session__peek_event(session, file_offset, buf,
428 PERF_SAMPLE_MAX_SIZE, &event, NULL);
429 if (err)
430 return err;
431
432 if (event->header.type == PERF_RECORD_AUXTRACE) {
433 if (event->header.size < sizeof(struct perf_record_auxtrace) ||
434 event->header.size != sz) {
435 err = -EINVAL;
436 goto out;
437 }
438 file_offset += event->header.size;
439 err = auxtrace_queues__add_event(queues, session, event,
440 file_offset, NULL);
441 }
442out:
443 return err;
444}
445
446void auxtrace_queues__free(struct auxtrace_queues *queues)
447{
448 unsigned int i;
449
450 for (i = 0; i < queues->nr_queues; i++) {
451 while (!list_empty(&queues->queue_array[i].head)) {
452 struct auxtrace_buffer *buffer;
453
454 buffer = list_entry(queues->queue_array[i].head.next,
455 struct auxtrace_buffer, list);
456 list_del_init(&buffer->list);
457 auxtrace_buffer__free(buffer);
458 }
459 }
460
461 zfree(&queues->queue_array);
462 queues->nr_queues = 0;
463}
464
465static void auxtrace_heapify(struct auxtrace_heap_item *heap_array,
466 unsigned int pos, unsigned int queue_nr,
467 u64 ordinal)
468{
469 unsigned int parent;
470
471 while (pos) {
472 parent = (pos - 1) >> 1;
473 if (heap_array[parent].ordinal <= ordinal)
474 break;
475 heap_array[pos] = heap_array[parent];
476 pos = parent;
477 }
478 heap_array[pos].queue_nr = queue_nr;
479 heap_array[pos].ordinal = ordinal;
480}
481
482int auxtrace_heap__add(struct auxtrace_heap *heap, unsigned int queue_nr,
483 u64 ordinal)
484{
485 struct auxtrace_heap_item *heap_array;
486
487 if (queue_nr >= heap->heap_sz) {
488 unsigned int heap_sz = AUXTRACE_INIT_NR_QUEUES;
489
490 while (heap_sz <= queue_nr)
491 heap_sz <<= 1;
492 heap_array = realloc(heap->heap_array,
493 heap_sz * sizeof(struct auxtrace_heap_item));
494 if (!heap_array)
495 return -ENOMEM;
496 heap->heap_array = heap_array;
497 heap->heap_sz = heap_sz;
498 }
499
500 auxtrace_heapify(heap->heap_array, heap->heap_cnt++, queue_nr, ordinal);
501
502 return 0;
503}
504
505void auxtrace_heap__free(struct auxtrace_heap *heap)
506{
507 zfree(&heap->heap_array);
508 heap->heap_cnt = 0;
509 heap->heap_sz = 0;
510}
511
512void auxtrace_heap__pop(struct auxtrace_heap *heap)
513{
514 unsigned int pos, last, heap_cnt = heap->heap_cnt;
515 struct auxtrace_heap_item *heap_array;
516
517 if (!heap_cnt)
518 return;
519
520 heap->heap_cnt -= 1;
521
522 heap_array = heap->heap_array;
523
524 pos = 0;
525 while (1) {
526 unsigned int left, right;
527
528 left = (pos << 1) + 1;
529 if (left >= heap_cnt)
530 break;
531 right = left + 1;
532 if (right >= heap_cnt) {
533 heap_array[pos] = heap_array[left];
534 return;
535 }
536 if (heap_array[left].ordinal < heap_array[right].ordinal) {
537 heap_array[pos] = heap_array[left];
538 pos = left;
539 } else {
540 heap_array[pos] = heap_array[right];
541 pos = right;
542 }
543 }
544
545 last = heap_cnt - 1;
546 auxtrace_heapify(heap_array, pos, heap_array[last].queue_nr,
547 heap_array[last].ordinal);
548}
549
550size_t auxtrace_record__info_priv_size(struct auxtrace_record *itr,
551 struct evlist *evlist)
552{
553 if (itr)
554 return itr->info_priv_size(itr, evlist);
555 return 0;
556}
557
558static int auxtrace_not_supported(void)
559{
560 pr_err("AUX area tracing is not supported on this architecture\n");
561 return -EINVAL;
562}
563
564int auxtrace_record__info_fill(struct auxtrace_record *itr,
565 struct perf_session *session,
566 struct perf_record_auxtrace_info *auxtrace_info,
567 size_t priv_size)
568{
569 if (itr)
570 return itr->info_fill(itr, session, auxtrace_info, priv_size);
571 return auxtrace_not_supported();
572}
573
574void auxtrace_record__free(struct auxtrace_record *itr)
575{
576 if (itr)
577 itr->free(itr);
578}
579
580int auxtrace_record__snapshot_start(struct auxtrace_record *itr)
581{
582 if (itr && itr->snapshot_start)
583 return itr->snapshot_start(itr);
584 return 0;
585}
586
587int auxtrace_record__snapshot_finish(struct auxtrace_record *itr, bool on_exit)
588{
589 if (!on_exit && itr && itr->snapshot_finish)
590 return itr->snapshot_finish(itr);
591 return 0;
592}
593
594int auxtrace_record__find_snapshot(struct auxtrace_record *itr, int idx,
595 struct auxtrace_mmap *mm,
596 unsigned char *data, u64 *head, u64 *old)
597{
598 if (itr && itr->find_snapshot)
599 return itr->find_snapshot(itr, idx, mm, data, head, old);
600 return 0;
601}
602
603int auxtrace_record__options(struct auxtrace_record *itr,
604 struct evlist *evlist,
605 struct record_opts *opts)
606{
607 if (itr) {
608 itr->evlist = evlist;
609 return itr->recording_options(itr, evlist, opts);
610 }
611 return 0;
612}
613
614u64 auxtrace_record__reference(struct auxtrace_record *itr)
615{
616 if (itr)
617 return itr->reference(itr);
618 return 0;
619}
620
621int auxtrace_parse_snapshot_options(struct auxtrace_record *itr,
622 struct record_opts *opts, const char *str)
623{
624 if (!str)
625 return 0;
626
627
628 switch (*str) {
629 case 'e':
630 opts->auxtrace_snapshot_on_exit = true;
631 str++;
632 break;
633 default:
634 break;
635 }
636
637 if (itr && itr->parse_snapshot_options)
638 return itr->parse_snapshot_options(itr, opts, str);
639
640 pr_err("No AUX area tracing to snapshot\n");
641 return -EINVAL;
642}
643
644int auxtrace_record__read_finish(struct auxtrace_record *itr, int idx)
645{
646 struct evsel *evsel;
647
648 if (!itr->evlist || !itr->pmu)
649 return -EINVAL;
650
651 evlist__for_each_entry(itr->evlist, evsel) {
652 if (evsel->core.attr.type == itr->pmu->type) {
653 if (evsel->disabled)
654 return 0;
655 return evlist__enable_event_idx(itr->evlist, evsel, idx);
656 }
657 }
658 return -EINVAL;
659}
660
661
662
663
664
665
666#define MAX_AUX_SAMPLE_SIZE (60 * 1024)
667
668
669#define DEFAULT_AUX_SAMPLE_SIZE (4 * 1024)
670
671static int auxtrace_validate_aux_sample_size(struct evlist *evlist,
672 struct record_opts *opts)
673{
674 struct evsel *evsel;
675 bool has_aux_leader = false;
676 u32 sz;
677
678 evlist__for_each_entry(evlist, evsel) {
679 sz = evsel->core.attr.aux_sample_size;
680 if (evsel__is_group_leader(evsel)) {
681 has_aux_leader = evsel__is_aux_event(evsel);
682 if (sz) {
683 if (has_aux_leader)
684 pr_err("Cannot add AUX area sampling to an AUX area event\n");
685 else
686 pr_err("Cannot add AUX area sampling to a group leader\n");
687 return -EINVAL;
688 }
689 }
690 if (sz > MAX_AUX_SAMPLE_SIZE) {
691 pr_err("AUX area sample size %u too big, max. %d\n",
692 sz, MAX_AUX_SAMPLE_SIZE);
693 return -EINVAL;
694 }
695 if (sz) {
696 if (!has_aux_leader) {
697 pr_err("Cannot add AUX area sampling because group leader is not an AUX area event\n");
698 return -EINVAL;
699 }
700 evsel__set_sample_bit(evsel, AUX);
701 opts->auxtrace_sample_mode = true;
702 } else {
703 evsel__reset_sample_bit(evsel, AUX);
704 }
705 }
706
707 if (!opts->auxtrace_sample_mode) {
708 pr_err("AUX area sampling requires an AUX area event group leader plus other events to which to add samples\n");
709 return -EINVAL;
710 }
711
712 if (!perf_can_aux_sample()) {
713 pr_err("AUX area sampling is not supported by kernel\n");
714 return -EINVAL;
715 }
716
717 return 0;
718}
719
720int auxtrace_parse_sample_options(struct auxtrace_record *itr,
721 struct evlist *evlist,
722 struct record_opts *opts, const char *str)
723{
724 struct evsel_config_term *term;
725 struct evsel *aux_evsel;
726 bool has_aux_sample_size = false;
727 bool has_aux_leader = false;
728 struct evsel *evsel;
729 char *endptr;
730 unsigned long sz;
731
732 if (!str)
733 goto no_opt;
734
735 if (!itr) {
736 pr_err("No AUX area event to sample\n");
737 return -EINVAL;
738 }
739
740 sz = strtoul(str, &endptr, 0);
741 if (*endptr || sz > UINT_MAX) {
742 pr_err("Bad AUX area sampling option: '%s'\n", str);
743 return -EINVAL;
744 }
745
746 if (!sz)
747 sz = itr->default_aux_sample_size;
748
749 if (!sz)
750 sz = DEFAULT_AUX_SAMPLE_SIZE;
751
752
753 evlist__for_each_entry(evlist, evsel) {
754 if (evsel__is_group_leader(evsel)) {
755 has_aux_leader = evsel__is_aux_event(evsel);
756 } else if (has_aux_leader) {
757 evsel->core.attr.aux_sample_size = sz;
758 }
759 }
760no_opt:
761 aux_evsel = NULL;
762
763 evlist__for_each_entry(evlist, evsel) {
764 if (evsel__is_aux_event(evsel))
765 aux_evsel = evsel;
766 term = evsel__get_config_term(evsel, AUX_SAMPLE_SIZE);
767 if (term) {
768 has_aux_sample_size = true;
769 evsel->core.attr.aux_sample_size = term->val.aux_sample_size;
770
771 if (aux_evsel && evsel->core.attr.aux_sample_size)
772 evlist__regroup(evlist, aux_evsel, evsel);
773 }
774 }
775
776 if (!str && !has_aux_sample_size)
777 return 0;
778
779 if (!itr) {
780 pr_err("No AUX area event to sample\n");
781 return -EINVAL;
782 }
783
784 return auxtrace_validate_aux_sample_size(evlist, opts);
785}
786
787void auxtrace_regroup_aux_output(struct evlist *evlist)
788{
789 struct evsel *evsel, *aux_evsel = NULL;
790 struct evsel_config_term *term;
791
792 evlist__for_each_entry(evlist, evsel) {
793 if (evsel__is_aux_event(evsel))
794 aux_evsel = evsel;
795 term = evsel__get_config_term(evsel, AUX_OUTPUT);
796
797 if (term && aux_evsel)
798 evlist__regroup(evlist, aux_evsel, evsel);
799 }
800}
801
802struct auxtrace_record *__weak
803auxtrace_record__init(struct evlist *evlist __maybe_unused, int *err)
804{
805 *err = 0;
806 return NULL;
807}
808
809static int auxtrace_index__alloc(struct list_head *head)
810{
811 struct auxtrace_index *auxtrace_index;
812
813 auxtrace_index = malloc(sizeof(struct auxtrace_index));
814 if (!auxtrace_index)
815 return -ENOMEM;
816
817 auxtrace_index->nr = 0;
818 INIT_LIST_HEAD(&auxtrace_index->list);
819
820 list_add_tail(&auxtrace_index->list, head);
821
822 return 0;
823}
824
825void auxtrace_index__free(struct list_head *head)
826{
827 struct auxtrace_index *auxtrace_index, *n;
828
829 list_for_each_entry_safe(auxtrace_index, n, head, list) {
830 list_del_init(&auxtrace_index->list);
831 free(auxtrace_index);
832 }
833}
834
835static struct auxtrace_index *auxtrace_index__last(struct list_head *head)
836{
837 struct auxtrace_index *auxtrace_index;
838 int err;
839
840 if (list_empty(head)) {
841 err = auxtrace_index__alloc(head);
842 if (err)
843 return NULL;
844 }
845
846 auxtrace_index = list_entry(head->prev, struct auxtrace_index, list);
847
848 if (auxtrace_index->nr >= PERF_AUXTRACE_INDEX_ENTRY_COUNT) {
849 err = auxtrace_index__alloc(head);
850 if (err)
851 return NULL;
852 auxtrace_index = list_entry(head->prev, struct auxtrace_index,
853 list);
854 }
855
856 return auxtrace_index;
857}
858
859int auxtrace_index__auxtrace_event(struct list_head *head,
860 union perf_event *event, off_t file_offset)
861{
862 struct auxtrace_index *auxtrace_index;
863 size_t nr;
864
865 auxtrace_index = auxtrace_index__last(head);
866 if (!auxtrace_index)
867 return -ENOMEM;
868
869 nr = auxtrace_index->nr;
870 auxtrace_index->entries[nr].file_offset = file_offset;
871 auxtrace_index->entries[nr].sz = event->header.size;
872 auxtrace_index->nr += 1;
873
874 return 0;
875}
876
877static int auxtrace_index__do_write(int fd,
878 struct auxtrace_index *auxtrace_index)
879{
880 struct auxtrace_index_entry ent;
881 size_t i;
882
883 for (i = 0; i < auxtrace_index->nr; i++) {
884 ent.file_offset = auxtrace_index->entries[i].file_offset;
885 ent.sz = auxtrace_index->entries[i].sz;
886 if (writen(fd, &ent, sizeof(ent)) != sizeof(ent))
887 return -errno;
888 }
889 return 0;
890}
891
892int auxtrace_index__write(int fd, struct list_head *head)
893{
894 struct auxtrace_index *auxtrace_index;
895 u64 total = 0;
896 int err;
897
898 list_for_each_entry(auxtrace_index, head, list)
899 total += auxtrace_index->nr;
900
901 if (writen(fd, &total, sizeof(total)) != sizeof(total))
902 return -errno;
903
904 list_for_each_entry(auxtrace_index, head, list) {
905 err = auxtrace_index__do_write(fd, auxtrace_index);
906 if (err)
907 return err;
908 }
909
910 return 0;
911}
912
913static int auxtrace_index__process_entry(int fd, struct list_head *head,
914 bool needs_swap)
915{
916 struct auxtrace_index *auxtrace_index;
917 struct auxtrace_index_entry ent;
918 size_t nr;
919
920 if (readn(fd, &ent, sizeof(ent)) != sizeof(ent))
921 return -1;
922
923 auxtrace_index = auxtrace_index__last(head);
924 if (!auxtrace_index)
925 return -1;
926
927 nr = auxtrace_index->nr;
928 if (needs_swap) {
929 auxtrace_index->entries[nr].file_offset =
930 bswap_64(ent.file_offset);
931 auxtrace_index->entries[nr].sz = bswap_64(ent.sz);
932 } else {
933 auxtrace_index->entries[nr].file_offset = ent.file_offset;
934 auxtrace_index->entries[nr].sz = ent.sz;
935 }
936
937 auxtrace_index->nr = nr + 1;
938
939 return 0;
940}
941
942int auxtrace_index__process(int fd, u64 size, struct perf_session *session,
943 bool needs_swap)
944{
945 struct list_head *head = &session->auxtrace_index;
946 u64 nr;
947
948 if (readn(fd, &nr, sizeof(u64)) != sizeof(u64))
949 return -1;
950
951 if (needs_swap)
952 nr = bswap_64(nr);
953
954 if (sizeof(u64) + nr * sizeof(struct auxtrace_index_entry) > size)
955 return -1;
956
957 while (nr--) {
958 int err;
959
960 err = auxtrace_index__process_entry(fd, head, needs_swap);
961 if (err)
962 return -1;
963 }
964
965 return 0;
966}
967
968static int auxtrace_queues__process_index_entry(struct auxtrace_queues *queues,
969 struct perf_session *session,
970 struct auxtrace_index_entry *ent)
971{
972 return auxtrace_queues__add_indexed_event(queues, session,
973 ent->file_offset, ent->sz);
974}
975
976int auxtrace_queues__process_index(struct auxtrace_queues *queues,
977 struct perf_session *session)
978{
979 struct auxtrace_index *auxtrace_index;
980 struct auxtrace_index_entry *ent;
981 size_t i;
982 int err;
983
984 if (auxtrace__dont_decode(session))
985 return 0;
986
987 list_for_each_entry(auxtrace_index, &session->auxtrace_index, list) {
988 for (i = 0; i < auxtrace_index->nr; i++) {
989 ent = &auxtrace_index->entries[i];
990 err = auxtrace_queues__process_index_entry(queues,
991 session,
992 ent);
993 if (err)
994 return err;
995 }
996 }
997 return 0;
998}
999
1000struct auxtrace_buffer *auxtrace_buffer__next(struct auxtrace_queue *queue,
1001 struct auxtrace_buffer *buffer)
1002{
1003 if (buffer) {
1004 if (list_is_last(&buffer->list, &queue->head))
1005 return NULL;
1006 return list_entry(buffer->list.next, struct auxtrace_buffer,
1007 list);
1008 } else {
1009 if (list_empty(&queue->head))
1010 return NULL;
1011 return list_entry(queue->head.next, struct auxtrace_buffer,
1012 list);
1013 }
1014}
1015
1016struct auxtrace_queue *auxtrace_queues__sample_queue(struct auxtrace_queues *queues,
1017 struct perf_sample *sample,
1018 struct perf_session *session)
1019{
1020 struct perf_sample_id *sid;
1021 unsigned int idx;
1022 u64 id;
1023
1024 id = sample->id;
1025 if (!id)
1026 return NULL;
1027
1028 sid = evlist__id2sid(session->evlist, id);
1029 if (!sid)
1030 return NULL;
1031
1032 idx = sid->idx;
1033
1034 if (idx >= queues->nr_queues)
1035 return NULL;
1036
1037 return &queues->queue_array[idx];
1038}
1039
1040int auxtrace_queues__add_sample(struct auxtrace_queues *queues,
1041 struct perf_session *session,
1042 struct perf_sample *sample, u64 data_offset,
1043 u64 reference)
1044{
1045 struct auxtrace_buffer buffer = {
1046 .pid = -1,
1047 .data_offset = data_offset,
1048 .reference = reference,
1049 .size = sample->aux_sample.size,
1050 };
1051 struct perf_sample_id *sid;
1052 u64 id = sample->id;
1053 unsigned int idx;
1054
1055 if (!id)
1056 return -EINVAL;
1057
1058 sid = evlist__id2sid(session->evlist, id);
1059 if (!sid)
1060 return -ENOENT;
1061
1062 idx = sid->idx;
1063 buffer.tid = sid->tid;
1064 buffer.cpu = sid->cpu;
1065
1066 return auxtrace_queues__add_buffer(queues, session, idx, &buffer, NULL);
1067}
1068
1069struct queue_data {
1070 bool samples;
1071 bool events;
1072};
1073
1074static int auxtrace_queue_data_cb(struct perf_session *session,
1075 union perf_event *event, u64 offset,
1076 void *data)
1077{
1078 struct queue_data *qd = data;
1079 struct perf_sample sample;
1080 int err;
1081
1082 if (qd->events && event->header.type == PERF_RECORD_AUXTRACE) {
1083 if (event->header.size < sizeof(struct perf_record_auxtrace))
1084 return -EINVAL;
1085 offset += event->header.size;
1086 return session->auxtrace->queue_data(session, NULL, event,
1087 offset);
1088 }
1089
1090 if (!qd->samples || event->header.type != PERF_RECORD_SAMPLE)
1091 return 0;
1092
1093 err = evlist__parse_sample(session->evlist, event, &sample);
1094 if (err)
1095 return err;
1096
1097 if (!sample.aux_sample.size)
1098 return 0;
1099
1100 offset += sample.aux_sample.data - (void *)event;
1101
1102 return session->auxtrace->queue_data(session, &sample, NULL, offset);
1103}
1104
1105int auxtrace_queue_data(struct perf_session *session, bool samples, bool events)
1106{
1107 struct queue_data qd = {
1108 .samples = samples,
1109 .events = events,
1110 };
1111
1112 if (auxtrace__dont_decode(session))
1113 return 0;
1114
1115 if (!session->auxtrace || !session->auxtrace->queue_data)
1116 return -EINVAL;
1117
1118 return perf_session__peek_events(session, session->header.data_offset,
1119 session->header.data_size,
1120 auxtrace_queue_data_cb, &qd);
1121}
1122
1123void *auxtrace_buffer__get_data_rw(struct auxtrace_buffer *buffer, int fd, bool rw)
1124{
1125 int prot = rw ? PROT_READ | PROT_WRITE : PROT_READ;
1126 size_t adj = buffer->data_offset & (page_size - 1);
1127 size_t size = buffer->size + adj;
1128 off_t file_offset = buffer->data_offset - adj;
1129 void *addr;
1130
1131 if (buffer->data)
1132 return buffer->data;
1133
1134 addr = mmap(NULL, size, prot, MAP_SHARED, fd, file_offset);
1135 if (addr == MAP_FAILED)
1136 return NULL;
1137
1138 buffer->mmap_addr = addr;
1139 buffer->mmap_size = size;
1140
1141 buffer->data = addr + adj;
1142
1143 return buffer->data;
1144}
1145
1146void auxtrace_buffer__put_data(struct auxtrace_buffer *buffer)
1147{
1148 if (!buffer->data || !buffer->mmap_addr)
1149 return;
1150 munmap(buffer->mmap_addr, buffer->mmap_size);
1151 buffer->mmap_addr = NULL;
1152 buffer->mmap_size = 0;
1153 buffer->data = NULL;
1154 buffer->use_data = NULL;
1155}
1156
1157void auxtrace_buffer__drop_data(struct auxtrace_buffer *buffer)
1158{
1159 auxtrace_buffer__put_data(buffer);
1160 if (buffer->data_needs_freeing) {
1161 buffer->data_needs_freeing = false;
1162 zfree(&buffer->data);
1163 buffer->use_data = NULL;
1164 buffer->size = 0;
1165 }
1166}
1167
1168void auxtrace_buffer__free(struct auxtrace_buffer *buffer)
1169{
1170 auxtrace_buffer__drop_data(buffer);
1171 free(buffer);
1172}
1173
1174void auxtrace_synth_error(struct perf_record_auxtrace_error *auxtrace_error, int type,
1175 int code, int cpu, pid_t pid, pid_t tid, u64 ip,
1176 const char *msg, u64 timestamp)
1177{
1178 size_t size;
1179
1180 memset(auxtrace_error, 0, sizeof(struct perf_record_auxtrace_error));
1181
1182 auxtrace_error->header.type = PERF_RECORD_AUXTRACE_ERROR;
1183 auxtrace_error->type = type;
1184 auxtrace_error->code = code;
1185 auxtrace_error->cpu = cpu;
1186 auxtrace_error->pid = pid;
1187 auxtrace_error->tid = tid;
1188 auxtrace_error->fmt = 1;
1189 auxtrace_error->ip = ip;
1190 auxtrace_error->time = timestamp;
1191 strlcpy(auxtrace_error->msg, msg, MAX_AUXTRACE_ERROR_MSG);
1192
1193 size = (void *)auxtrace_error->msg - (void *)auxtrace_error +
1194 strlen(auxtrace_error->msg) + 1;
1195 auxtrace_error->header.size = PERF_ALIGN(size, sizeof(u64));
1196}
1197
1198int perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr,
1199 struct perf_tool *tool,
1200 struct perf_session *session,
1201 perf_event__handler_t process)
1202{
1203 union perf_event *ev;
1204 size_t priv_size;
1205 int err;
1206
1207 pr_debug2("Synthesizing auxtrace information\n");
1208 priv_size = auxtrace_record__info_priv_size(itr, session->evlist);
1209 ev = zalloc(sizeof(struct perf_record_auxtrace_info) + priv_size);
1210 if (!ev)
1211 return -ENOMEM;
1212
1213 ev->auxtrace_info.header.type = PERF_RECORD_AUXTRACE_INFO;
1214 ev->auxtrace_info.header.size = sizeof(struct perf_record_auxtrace_info) +
1215 priv_size;
1216 err = auxtrace_record__info_fill(itr, session, &ev->auxtrace_info,
1217 priv_size);
1218 if (err)
1219 goto out_free;
1220
1221 err = process(tool, ev, NULL, NULL);
1222out_free:
1223 free(ev);
1224 return err;
1225}
1226
1227static void unleader_evsel(struct evlist *evlist, struct evsel *leader)
1228{
1229 struct evsel *new_leader = NULL;
1230 struct evsel *evsel;
1231
1232
1233 evlist__for_each_entry(evlist, evsel) {
1234 if (!evsel__has_leader(evsel, leader) || evsel == leader)
1235 continue;
1236 if (!new_leader)
1237 new_leader = evsel;
1238 evsel__set_leader(evsel, new_leader);
1239 }
1240
1241
1242 if (new_leader) {
1243 zfree(&new_leader->group_name);
1244 new_leader->group_name = leader->group_name;
1245 leader->group_name = NULL;
1246
1247 new_leader->core.nr_members = leader->core.nr_members - 1;
1248 leader->core.nr_members = 1;
1249 }
1250}
1251
1252static void unleader_auxtrace(struct perf_session *session)
1253{
1254 struct evsel *evsel;
1255
1256 evlist__for_each_entry(session->evlist, evsel) {
1257 if (auxtrace__evsel_is_auxtrace(session, evsel) &&
1258 evsel__is_group_leader(evsel)) {
1259 unleader_evsel(session->evlist, evsel);
1260 }
1261 }
1262}
1263
1264int perf_event__process_auxtrace_info(struct perf_session *session,
1265 union perf_event *event)
1266{
1267 enum auxtrace_type type = event->auxtrace_info.type;
1268 int err;
1269
1270 if (dump_trace)
1271 fprintf(stdout, " type: %u\n", type);
1272
1273 switch (type) {
1274 case PERF_AUXTRACE_INTEL_PT:
1275 err = intel_pt_process_auxtrace_info(event, session);
1276 break;
1277 case PERF_AUXTRACE_INTEL_BTS:
1278 err = intel_bts_process_auxtrace_info(event, session);
1279 break;
1280 case PERF_AUXTRACE_ARM_SPE:
1281 err = arm_spe_process_auxtrace_info(event, session);
1282 break;
1283 case PERF_AUXTRACE_CS_ETM:
1284 err = cs_etm__process_auxtrace_info(event, session);
1285 break;
1286 case PERF_AUXTRACE_S390_CPUMSF:
1287 err = s390_cpumsf_process_auxtrace_info(event, session);
1288 break;
1289 case PERF_AUXTRACE_UNKNOWN:
1290 default:
1291 return -EINVAL;
1292 }
1293
1294 if (err)
1295 return err;
1296
1297 unleader_auxtrace(session);
1298
1299 return 0;
1300}
1301
1302s64 perf_event__process_auxtrace(struct perf_session *session,
1303 union perf_event *event)
1304{
1305 s64 err;
1306
1307 if (dump_trace)
1308 fprintf(stdout, " size: %#"PRI_lx64" offset: %#"PRI_lx64" ref: %#"PRI_lx64" idx: %u tid: %d cpu: %d\n",
1309 event->auxtrace.size, event->auxtrace.offset,
1310 event->auxtrace.reference, event->auxtrace.idx,
1311 event->auxtrace.tid, event->auxtrace.cpu);
1312
1313 if (auxtrace__dont_decode(session))
1314 return event->auxtrace.size;
1315
1316 if (!session->auxtrace || event->header.type != PERF_RECORD_AUXTRACE)
1317 return -EINVAL;
1318
1319 err = session->auxtrace->process_auxtrace_event(session, event, session->tool);
1320 if (err < 0)
1321 return err;
1322
1323 return event->auxtrace.size;
1324}
1325
1326#define PERF_ITRACE_DEFAULT_PERIOD_TYPE PERF_ITRACE_PERIOD_NANOSECS
1327#define PERF_ITRACE_DEFAULT_PERIOD 100000
1328#define PERF_ITRACE_DEFAULT_CALLCHAIN_SZ 16
1329#define PERF_ITRACE_MAX_CALLCHAIN_SZ 1024
1330#define PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ 64
1331#define PERF_ITRACE_MAX_LAST_BRANCH_SZ 1024
1332
1333void itrace_synth_opts__set_default(struct itrace_synth_opts *synth_opts,
1334 bool no_sample)
1335{
1336 synth_opts->branches = true;
1337 synth_opts->transactions = true;
1338 synth_opts->ptwrites = true;
1339 synth_opts->pwr_events = true;
1340 synth_opts->other_events = true;
1341 synth_opts->errors = true;
1342 synth_opts->flc = true;
1343 synth_opts->llc = true;
1344 synth_opts->tlb = true;
1345 synth_opts->mem = true;
1346 synth_opts->remote_access = true;
1347
1348 if (no_sample) {
1349 synth_opts->period_type = PERF_ITRACE_PERIOD_INSTRUCTIONS;
1350 synth_opts->period = 1;
1351 synth_opts->calls = true;
1352 } else {
1353 synth_opts->instructions = true;
1354 synth_opts->period_type = PERF_ITRACE_DEFAULT_PERIOD_TYPE;
1355 synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD;
1356 }
1357 synth_opts->callchain_sz = PERF_ITRACE_DEFAULT_CALLCHAIN_SZ;
1358 synth_opts->last_branch_sz = PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ;
1359 synth_opts->initial_skip = 0;
1360}
1361
1362static int get_flag(const char **ptr, unsigned int *flags)
1363{
1364 while (1) {
1365 char c = **ptr;
1366
1367 if (c >= 'a' && c <= 'z') {
1368 *flags |= 1 << (c - 'a');
1369 ++*ptr;
1370 return 0;
1371 } else if (c == ' ') {
1372 ++*ptr;
1373 continue;
1374 } else {
1375 return -1;
1376 }
1377 }
1378}
1379
1380static int get_flags(const char **ptr, unsigned int *plus_flags, unsigned int *minus_flags)
1381{
1382 while (1) {
1383 switch (**ptr) {
1384 case '+':
1385 ++*ptr;
1386 if (get_flag(ptr, plus_flags))
1387 return -1;
1388 break;
1389 case '-':
1390 ++*ptr;
1391 if (get_flag(ptr, minus_flags))
1392 return -1;
1393 break;
1394 case ' ':
1395 ++*ptr;
1396 break;
1397 default:
1398 return 0;
1399 }
1400 }
1401}
1402
1403
1404
1405
1406
1407
1408int itrace_do_parse_synth_opts(struct itrace_synth_opts *synth_opts,
1409 const char *str, int unset)
1410{
1411 const char *p;
1412 char *endptr;
1413 bool period_type_set = false;
1414 bool period_set = false;
1415
1416 synth_opts->set = true;
1417
1418 if (unset) {
1419 synth_opts->dont_decode = true;
1420 return 0;
1421 }
1422
1423 if (!str) {
1424 itrace_synth_opts__set_default(synth_opts,
1425 synth_opts->default_no_sample);
1426 return 0;
1427 }
1428
1429 for (p = str; *p;) {
1430 switch (*p++) {
1431 case 'i':
1432 synth_opts->instructions = true;
1433 while (*p == ' ' || *p == ',')
1434 p += 1;
1435 if (isdigit(*p)) {
1436 synth_opts->period = strtoull(p, &endptr, 10);
1437 period_set = true;
1438 p = endptr;
1439 while (*p == ' ' || *p == ',')
1440 p += 1;
1441 switch (*p++) {
1442 case 'i':
1443 synth_opts->period_type =
1444 PERF_ITRACE_PERIOD_INSTRUCTIONS;
1445 period_type_set = true;
1446 break;
1447 case 't':
1448 synth_opts->period_type =
1449 PERF_ITRACE_PERIOD_TICKS;
1450 period_type_set = true;
1451 break;
1452 case 'm':
1453 synth_opts->period *= 1000;
1454
1455 case 'u':
1456 synth_opts->period *= 1000;
1457
1458 case 'n':
1459 if (*p++ != 's')
1460 goto out_err;
1461 synth_opts->period_type =
1462 PERF_ITRACE_PERIOD_NANOSECS;
1463 period_type_set = true;
1464 break;
1465 case '\0':
1466 goto out;
1467 default:
1468 goto out_err;
1469 }
1470 }
1471 break;
1472 case 'b':
1473 synth_opts->branches = true;
1474 break;
1475 case 'x':
1476 synth_opts->transactions = true;
1477 break;
1478 case 'w':
1479 synth_opts->ptwrites = true;
1480 break;
1481 case 'p':
1482 synth_opts->pwr_events = true;
1483 break;
1484 case 'o':
1485 synth_opts->other_events = true;
1486 break;
1487 case 'e':
1488 synth_opts->errors = true;
1489 if (get_flags(&p, &synth_opts->error_plus_flags,
1490 &synth_opts->error_minus_flags))
1491 goto out_err;
1492 break;
1493 case 'd':
1494 synth_opts->log = true;
1495 if (get_flags(&p, &synth_opts->log_plus_flags,
1496 &synth_opts->log_minus_flags))
1497 goto out_err;
1498 break;
1499 case 'c':
1500 synth_opts->branches = true;
1501 synth_opts->calls = true;
1502 break;
1503 case 'r':
1504 synth_opts->branches = true;
1505 synth_opts->returns = true;
1506 break;
1507 case 'G':
1508 case 'g':
1509 if (p[-1] == 'G')
1510 synth_opts->add_callchain = true;
1511 else
1512 synth_opts->callchain = true;
1513 synth_opts->callchain_sz =
1514 PERF_ITRACE_DEFAULT_CALLCHAIN_SZ;
1515 while (*p == ' ' || *p == ',')
1516 p += 1;
1517 if (isdigit(*p)) {
1518 unsigned int val;
1519
1520 val = strtoul(p, &endptr, 10);
1521 p = endptr;
1522 if (!val || val > PERF_ITRACE_MAX_CALLCHAIN_SZ)
1523 goto out_err;
1524 synth_opts->callchain_sz = val;
1525 }
1526 break;
1527 case 'L':
1528 case 'l':
1529 if (p[-1] == 'L')
1530 synth_opts->add_last_branch = true;
1531 else
1532 synth_opts->last_branch = true;
1533 synth_opts->last_branch_sz =
1534 PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ;
1535 while (*p == ' ' || *p == ',')
1536 p += 1;
1537 if (isdigit(*p)) {
1538 unsigned int val;
1539
1540 val = strtoul(p, &endptr, 10);
1541 p = endptr;
1542 if (!val ||
1543 val > PERF_ITRACE_MAX_LAST_BRANCH_SZ)
1544 goto out_err;
1545 synth_opts->last_branch_sz = val;
1546 }
1547 break;
1548 case 's':
1549 synth_opts->initial_skip = strtoul(p, &endptr, 10);
1550 if (p == endptr)
1551 goto out_err;
1552 p = endptr;
1553 break;
1554 case 'f':
1555 synth_opts->flc = true;
1556 break;
1557 case 'm':
1558 synth_opts->llc = true;
1559 break;
1560 case 't':
1561 synth_opts->tlb = true;
1562 break;
1563 case 'a':
1564 synth_opts->remote_access = true;
1565 break;
1566 case 'M':
1567 synth_opts->mem = true;
1568 break;
1569 case 'q':
1570 synth_opts->quick += 1;
1571 break;
1572 case 'Z':
1573 synth_opts->timeless_decoding = true;
1574 break;
1575 case ' ':
1576 case ',':
1577 break;
1578 default:
1579 goto out_err;
1580 }
1581 }
1582out:
1583 if (synth_opts->instructions) {
1584 if (!period_type_set)
1585 synth_opts->period_type =
1586 PERF_ITRACE_DEFAULT_PERIOD_TYPE;
1587 if (!period_set)
1588 synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD;
1589 }
1590
1591 return 0;
1592
1593out_err:
1594 pr_err("Bad Instruction Tracing options '%s'\n", str);
1595 return -EINVAL;
1596}
1597
1598int itrace_parse_synth_opts(const struct option *opt, const char *str, int unset)
1599{
1600 return itrace_do_parse_synth_opts(opt->value, str, unset);
1601}
1602
1603static const char * const auxtrace_error_type_name[] = {
1604 [PERF_AUXTRACE_ERROR_ITRACE] = "instruction trace",
1605};
1606
1607static const char *auxtrace_error_name(int type)
1608{
1609 const char *error_type_name = NULL;
1610
1611 if (type < PERF_AUXTRACE_ERROR_MAX)
1612 error_type_name = auxtrace_error_type_name[type];
1613 if (!error_type_name)
1614 error_type_name = "unknown AUX";
1615 return error_type_name;
1616}
1617
1618size_t perf_event__fprintf_auxtrace_error(union perf_event *event, FILE *fp)
1619{
1620 struct perf_record_auxtrace_error *e = &event->auxtrace_error;
1621 unsigned long long nsecs = e->time;
1622 const char *msg = e->msg;
1623 int ret;
1624
1625 ret = fprintf(fp, " %s error type %u",
1626 auxtrace_error_name(e->type), e->type);
1627
1628 if (e->fmt && nsecs) {
1629 unsigned long secs = nsecs / NSEC_PER_SEC;
1630
1631 nsecs -= secs * NSEC_PER_SEC;
1632 ret += fprintf(fp, " time %lu.%09llu", secs, nsecs);
1633 } else {
1634 ret += fprintf(fp, " time 0");
1635 }
1636
1637 if (!e->fmt)
1638 msg = (const char *)&e->time;
1639
1640 ret += fprintf(fp, " cpu %d pid %d tid %d ip %#"PRI_lx64" code %u: %s\n",
1641 e->cpu, e->pid, e->tid, e->ip, e->code, msg);
1642 return ret;
1643}
1644
1645void perf_session__auxtrace_error_inc(struct perf_session *session,
1646 union perf_event *event)
1647{
1648 struct perf_record_auxtrace_error *e = &event->auxtrace_error;
1649
1650 if (e->type < PERF_AUXTRACE_ERROR_MAX)
1651 session->evlist->stats.nr_auxtrace_errors[e->type] += 1;
1652}
1653
1654void events_stats__auxtrace_error_warn(const struct events_stats *stats)
1655{
1656 int i;
1657
1658 for (i = 0; i < PERF_AUXTRACE_ERROR_MAX; i++) {
1659 if (!stats->nr_auxtrace_errors[i])
1660 continue;
1661 ui__warning("%u %s errors\n",
1662 stats->nr_auxtrace_errors[i],
1663 auxtrace_error_name(i));
1664 }
1665}
1666
1667int perf_event__process_auxtrace_error(struct perf_session *session,
1668 union perf_event *event)
1669{
1670 if (auxtrace__dont_decode(session))
1671 return 0;
1672
1673 perf_event__fprintf_auxtrace_error(event, stdout);
1674 return 0;
1675}
1676
1677static int __auxtrace_mmap__read(struct mmap *map,
1678 struct auxtrace_record *itr,
1679 struct perf_tool *tool, process_auxtrace_t fn,
1680 bool snapshot, size_t snapshot_size)
1681{
1682 struct auxtrace_mmap *mm = &map->auxtrace_mmap;
1683 u64 head, old = mm->prev, offset, ref;
1684 unsigned char *data = mm->base;
1685 size_t size, head_off, old_off, len1, len2, padding;
1686 union perf_event ev;
1687 void *data1, *data2;
1688
1689 if (snapshot) {
1690 head = auxtrace_mmap__read_snapshot_head(mm);
1691 if (auxtrace_record__find_snapshot(itr, mm->idx, mm, data,
1692 &head, &old))
1693 return -1;
1694 } else {
1695 head = auxtrace_mmap__read_head(mm);
1696 }
1697
1698 if (old == head)
1699 return 0;
1700
1701 pr_debug3("auxtrace idx %d old %#"PRIx64" head %#"PRIx64" diff %#"PRIx64"\n",
1702 mm->idx, old, head, head - old);
1703
1704 if (mm->mask) {
1705 head_off = head & mm->mask;
1706 old_off = old & mm->mask;
1707 } else {
1708 head_off = head % mm->len;
1709 old_off = old % mm->len;
1710 }
1711
1712 if (head_off > old_off)
1713 size = head_off - old_off;
1714 else
1715 size = mm->len - (old_off - head_off);
1716
1717 if (snapshot && size > snapshot_size)
1718 size = snapshot_size;
1719
1720 ref = auxtrace_record__reference(itr);
1721
1722 if (head > old || size <= head || mm->mask) {
1723 offset = head - size;
1724 } else {
1725
1726
1727
1728
1729
1730 u64 rem = (0ULL - mm->len) % mm->len;
1731
1732 offset = head - size - rem;
1733 }
1734
1735 if (size > head_off) {
1736 len1 = size - head_off;
1737 data1 = &data[mm->len - len1];
1738 len2 = head_off;
1739 data2 = &data[0];
1740 } else {
1741 len1 = size;
1742 data1 = &data[head_off - len1];
1743 len2 = 0;
1744 data2 = NULL;
1745 }
1746
1747 if (itr->alignment) {
1748 unsigned int unwanted = len1 % itr->alignment;
1749
1750 len1 -= unwanted;
1751 size -= unwanted;
1752 }
1753
1754
1755 padding = size & (PERF_AUXTRACE_RECORD_ALIGNMENT - 1);
1756 if (padding)
1757 padding = PERF_AUXTRACE_RECORD_ALIGNMENT - padding;
1758
1759 memset(&ev, 0, sizeof(ev));
1760 ev.auxtrace.header.type = PERF_RECORD_AUXTRACE;
1761 ev.auxtrace.header.size = sizeof(ev.auxtrace);
1762 ev.auxtrace.size = size + padding;
1763 ev.auxtrace.offset = offset;
1764 ev.auxtrace.reference = ref;
1765 ev.auxtrace.idx = mm->idx;
1766 ev.auxtrace.tid = mm->tid;
1767 ev.auxtrace.cpu = mm->cpu;
1768
1769 if (fn(tool, map, &ev, data1, len1, data2, len2))
1770 return -1;
1771
1772 mm->prev = head;
1773
1774 if (!snapshot) {
1775 auxtrace_mmap__write_tail(mm, head);
1776 if (itr->read_finish) {
1777 int err;
1778
1779 err = itr->read_finish(itr, mm->idx);
1780 if (err < 0)
1781 return err;
1782 }
1783 }
1784
1785 return 1;
1786}
1787
1788int auxtrace_mmap__read(struct mmap *map, struct auxtrace_record *itr,
1789 struct perf_tool *tool, process_auxtrace_t fn)
1790{
1791 return __auxtrace_mmap__read(map, itr, tool, fn, false, 0);
1792}
1793
1794int auxtrace_mmap__read_snapshot(struct mmap *map,
1795 struct auxtrace_record *itr,
1796 struct perf_tool *tool, process_auxtrace_t fn,
1797 size_t snapshot_size)
1798{
1799 return __auxtrace_mmap__read(map, itr, tool, fn, true, snapshot_size);
1800}
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812struct auxtrace_cache {
1813 struct hlist_head *hashtable;
1814 size_t sz;
1815 size_t entry_size;
1816 size_t limit;
1817 size_t cnt;
1818 unsigned int bits;
1819};
1820
1821struct auxtrace_cache *auxtrace_cache__new(unsigned int bits, size_t entry_size,
1822 unsigned int limit_percent)
1823{
1824 struct auxtrace_cache *c;
1825 struct hlist_head *ht;
1826 size_t sz, i;
1827
1828 c = zalloc(sizeof(struct auxtrace_cache));
1829 if (!c)
1830 return NULL;
1831
1832 sz = 1UL << bits;
1833
1834 ht = calloc(sz, sizeof(struct hlist_head));
1835 if (!ht)
1836 goto out_free;
1837
1838 for (i = 0; i < sz; i++)
1839 INIT_HLIST_HEAD(&ht[i]);
1840
1841 c->hashtable = ht;
1842 c->sz = sz;
1843 c->entry_size = entry_size;
1844 c->limit = (c->sz * limit_percent) / 100;
1845 c->bits = bits;
1846
1847 return c;
1848
1849out_free:
1850 free(c);
1851 return NULL;
1852}
1853
1854static void auxtrace_cache__drop(struct auxtrace_cache *c)
1855{
1856 struct auxtrace_cache_entry *entry;
1857 struct hlist_node *tmp;
1858 size_t i;
1859
1860 if (!c)
1861 return;
1862
1863 for (i = 0; i < c->sz; i++) {
1864 hlist_for_each_entry_safe(entry, tmp, &c->hashtable[i], hash) {
1865 hlist_del(&entry->hash);
1866 auxtrace_cache__free_entry(c, entry);
1867 }
1868 }
1869
1870 c->cnt = 0;
1871}
1872
1873void auxtrace_cache__free(struct auxtrace_cache *c)
1874{
1875 if (!c)
1876 return;
1877
1878 auxtrace_cache__drop(c);
1879 zfree(&c->hashtable);
1880 free(c);
1881}
1882
1883void *auxtrace_cache__alloc_entry(struct auxtrace_cache *c)
1884{
1885 return malloc(c->entry_size);
1886}
1887
1888void auxtrace_cache__free_entry(struct auxtrace_cache *c __maybe_unused,
1889 void *entry)
1890{
1891 free(entry);
1892}
1893
1894int auxtrace_cache__add(struct auxtrace_cache *c, u32 key,
1895 struct auxtrace_cache_entry *entry)
1896{
1897 if (c->limit && ++c->cnt > c->limit)
1898 auxtrace_cache__drop(c);
1899
1900 entry->key = key;
1901 hlist_add_head(&entry->hash, &c->hashtable[hash_32(key, c->bits)]);
1902
1903 return 0;
1904}
1905
1906static struct auxtrace_cache_entry *auxtrace_cache__rm(struct auxtrace_cache *c,
1907 u32 key)
1908{
1909 struct auxtrace_cache_entry *entry;
1910 struct hlist_head *hlist;
1911 struct hlist_node *n;
1912
1913 if (!c)
1914 return NULL;
1915
1916 hlist = &c->hashtable[hash_32(key, c->bits)];
1917 hlist_for_each_entry_safe(entry, n, hlist, hash) {
1918 if (entry->key == key) {
1919 hlist_del(&entry->hash);
1920 return entry;
1921 }
1922 }
1923
1924 return NULL;
1925}
1926
1927void auxtrace_cache__remove(struct auxtrace_cache *c, u32 key)
1928{
1929 struct auxtrace_cache_entry *entry = auxtrace_cache__rm(c, key);
1930
1931 auxtrace_cache__free_entry(c, entry);
1932}
1933
1934void *auxtrace_cache__lookup(struct auxtrace_cache *c, u32 key)
1935{
1936 struct auxtrace_cache_entry *entry;
1937 struct hlist_head *hlist;
1938
1939 if (!c)
1940 return NULL;
1941
1942 hlist = &c->hashtable[hash_32(key, c->bits)];
1943 hlist_for_each_entry(entry, hlist, hash) {
1944 if (entry->key == key)
1945 return entry;
1946 }
1947
1948 return NULL;
1949}
1950
1951static void addr_filter__free_str(struct addr_filter *filt)
1952{
1953 zfree(&filt->str);
1954 filt->action = NULL;
1955 filt->sym_from = NULL;
1956 filt->sym_to = NULL;
1957 filt->filename = NULL;
1958}
1959
1960static struct addr_filter *addr_filter__new(void)
1961{
1962 struct addr_filter *filt = zalloc(sizeof(*filt));
1963
1964 if (filt)
1965 INIT_LIST_HEAD(&filt->list);
1966
1967 return filt;
1968}
1969
1970static void addr_filter__free(struct addr_filter *filt)
1971{
1972 if (filt)
1973 addr_filter__free_str(filt);
1974 free(filt);
1975}
1976
1977static void addr_filters__add(struct addr_filters *filts,
1978 struct addr_filter *filt)
1979{
1980 list_add_tail(&filt->list, &filts->head);
1981 filts->cnt += 1;
1982}
1983
1984static void addr_filters__del(struct addr_filters *filts,
1985 struct addr_filter *filt)
1986{
1987 list_del_init(&filt->list);
1988 filts->cnt -= 1;
1989}
1990
1991void addr_filters__init(struct addr_filters *filts)
1992{
1993 INIT_LIST_HEAD(&filts->head);
1994 filts->cnt = 0;
1995}
1996
1997void addr_filters__exit(struct addr_filters *filts)
1998{
1999 struct addr_filter *filt, *n;
2000
2001 list_for_each_entry_safe(filt, n, &filts->head, list) {
2002 addr_filters__del(filts, filt);
2003 addr_filter__free(filt);
2004 }
2005}
2006
2007static int parse_num_or_str(char **inp, u64 *num, const char **str,
2008 const char *str_delim)
2009{
2010 *inp += strspn(*inp, " ");
2011
2012 if (isdigit(**inp)) {
2013 char *endptr;
2014
2015 if (!num)
2016 return -EINVAL;
2017 errno = 0;
2018 *num = strtoull(*inp, &endptr, 0);
2019 if (errno)
2020 return -errno;
2021 if (endptr == *inp)
2022 return -EINVAL;
2023 *inp = endptr;
2024 } else {
2025 size_t n;
2026
2027 if (!str)
2028 return -EINVAL;
2029 *inp += strspn(*inp, " ");
2030 *str = *inp;
2031 n = strcspn(*inp, str_delim);
2032 if (!n)
2033 return -EINVAL;
2034 *inp += n;
2035 if (**inp) {
2036 **inp = '\0';
2037 *inp += 1;
2038 }
2039 }
2040 return 0;
2041}
2042
2043static int parse_action(struct addr_filter *filt)
2044{
2045 if (!strcmp(filt->action, "filter")) {
2046 filt->start = true;
2047 filt->range = true;
2048 } else if (!strcmp(filt->action, "start")) {
2049 filt->start = true;
2050 } else if (!strcmp(filt->action, "stop")) {
2051 filt->start = false;
2052 } else if (!strcmp(filt->action, "tracestop")) {
2053 filt->start = false;
2054 filt->range = true;
2055 filt->action += 5;
2056 } else {
2057 return -EINVAL;
2058 }
2059 return 0;
2060}
2061
2062static int parse_sym_idx(char **inp, int *idx)
2063{
2064 *idx = -1;
2065
2066 *inp += strspn(*inp, " ");
2067
2068 if (**inp != '#')
2069 return 0;
2070
2071 *inp += 1;
2072
2073 if (**inp == 'g' || **inp == 'G') {
2074 *inp += 1;
2075 *idx = 0;
2076 } else {
2077 unsigned long num;
2078 char *endptr;
2079
2080 errno = 0;
2081 num = strtoul(*inp, &endptr, 0);
2082 if (errno)
2083 return -errno;
2084 if (endptr == *inp || num > INT_MAX)
2085 return -EINVAL;
2086 *inp = endptr;
2087 *idx = num;
2088 }
2089
2090 return 0;
2091}
2092
2093static int parse_addr_size(char **inp, u64 *num, const char **str, int *idx)
2094{
2095 int err = parse_num_or_str(inp, num, str, " ");
2096
2097 if (!err && *str)
2098 err = parse_sym_idx(inp, idx);
2099
2100 return err;
2101}
2102
2103static int parse_one_filter(struct addr_filter *filt, const char **filter_inp)
2104{
2105 char *fstr;
2106 int err;
2107
2108 filt->str = fstr = strdup(*filter_inp);
2109 if (!fstr)
2110 return -ENOMEM;
2111
2112 err = parse_num_or_str(&fstr, NULL, &filt->action, " ");
2113 if (err)
2114 goto out_err;
2115
2116 err = parse_action(filt);
2117 if (err)
2118 goto out_err;
2119
2120 err = parse_addr_size(&fstr, &filt->addr, &filt->sym_from,
2121 &filt->sym_from_idx);
2122 if (err)
2123 goto out_err;
2124
2125 fstr += strspn(fstr, " ");
2126
2127 if (*fstr == '/') {
2128 fstr += 1;
2129 err = parse_addr_size(&fstr, &filt->size, &filt->sym_to,
2130 &filt->sym_to_idx);
2131 if (err)
2132 goto out_err;
2133 filt->range = true;
2134 }
2135
2136 fstr += strspn(fstr, " ");
2137
2138 if (*fstr == '@') {
2139 fstr += 1;
2140 err = parse_num_or_str(&fstr, NULL, &filt->filename, " ,");
2141 if (err)
2142 goto out_err;
2143 }
2144
2145 fstr += strspn(fstr, " ,");
2146
2147 *filter_inp += fstr - filt->str;
2148
2149 return 0;
2150
2151out_err:
2152 addr_filter__free_str(filt);
2153
2154 return err;
2155}
2156
2157int addr_filters__parse_bare_filter(struct addr_filters *filts,
2158 const char *filter)
2159{
2160 struct addr_filter *filt;
2161 const char *fstr = filter;
2162 int err;
2163
2164 while (*fstr) {
2165 filt = addr_filter__new();
2166 err = parse_one_filter(filt, &fstr);
2167 if (err) {
2168 addr_filter__free(filt);
2169 addr_filters__exit(filts);
2170 return err;
2171 }
2172 addr_filters__add(filts, filt);
2173 }
2174
2175 return 0;
2176}
2177
2178struct sym_args {
2179 const char *name;
2180 u64 start;
2181 u64 size;
2182 int idx;
2183 int cnt;
2184 bool started;
2185 bool global;
2186 bool selected;
2187 bool duplicate;
2188 bool near;
2189};
2190
2191static bool kern_sym_match(struct sym_args *args, const char *name, char type)
2192{
2193
2194 return kallsyms__is_function(type) &&
2195 !strcmp(name, args->name) &&
2196 ((args->global && isupper(type)) ||
2197 (args->selected && ++(args->cnt) == args->idx) ||
2198 (!args->global && !args->selected));
2199}
2200
2201static int find_kern_sym_cb(void *arg, const char *name, char type, u64 start)
2202{
2203 struct sym_args *args = arg;
2204
2205 if (args->started) {
2206 if (!args->size)
2207 args->size = start - args->start;
2208 if (args->selected) {
2209 if (args->size)
2210 return 1;
2211 } else if (kern_sym_match(args, name, type)) {
2212 args->duplicate = true;
2213 return 1;
2214 }
2215 } else if (kern_sym_match(args, name, type)) {
2216 args->started = true;
2217 args->start = start;
2218 }
2219
2220 return 0;
2221}
2222
2223static int print_kern_sym_cb(void *arg, const char *name, char type, u64 start)
2224{
2225 struct sym_args *args = arg;
2226
2227 if (kern_sym_match(args, name, type)) {
2228 pr_err("#%d\t0x%"PRIx64"\t%c\t%s\n",
2229 ++args->cnt, start, type, name);
2230 args->near = true;
2231 } else if (args->near) {
2232 args->near = false;
2233 pr_err("\t\twhich is near\t\t%s\n", name);
2234 }
2235
2236 return 0;
2237}
2238
2239static int sym_not_found_error(const char *sym_name, int idx)
2240{
2241 if (idx > 0) {
2242 pr_err("N'th occurrence (N=%d) of symbol '%s' not found.\n",
2243 idx, sym_name);
2244 } else if (!idx) {
2245 pr_err("Global symbol '%s' not found.\n", sym_name);
2246 } else {
2247 pr_err("Symbol '%s' not found.\n", sym_name);
2248 }
2249 pr_err("Note that symbols must be functions.\n");
2250
2251 return -EINVAL;
2252}
2253
2254static int find_kern_sym(const char *sym_name, u64 *start, u64 *size, int idx)
2255{
2256 struct sym_args args = {
2257 .name = sym_name,
2258 .idx = idx,
2259 .global = !idx,
2260 .selected = idx > 0,
2261 };
2262 int err;
2263
2264 *start = 0;
2265 *size = 0;
2266
2267 err = kallsyms__parse("/proc/kallsyms", &args, find_kern_sym_cb);
2268 if (err < 0) {
2269 pr_err("Failed to parse /proc/kallsyms\n");
2270 return err;
2271 }
2272
2273 if (args.duplicate) {
2274 pr_err("Multiple kernel symbols with name '%s'\n", sym_name);
2275 args.cnt = 0;
2276 kallsyms__parse("/proc/kallsyms", &args, print_kern_sym_cb);
2277 pr_err("Disambiguate symbol name by inserting #n after the name e.g. %s #2\n",
2278 sym_name);
2279 pr_err("Or select a global symbol by inserting #0 or #g or #G\n");
2280 return -EINVAL;
2281 }
2282
2283 if (!args.started) {
2284 pr_err("Kernel symbol lookup: ");
2285 return sym_not_found_error(sym_name, idx);
2286 }
2287
2288 *start = args.start;
2289 *size = args.size;
2290
2291 return 0;
2292}
2293
2294static int find_entire_kern_cb(void *arg, const char *name __maybe_unused,
2295 char type, u64 start)
2296{
2297 struct sym_args *args = arg;
2298
2299 if (!kallsyms__is_function(type))
2300 return 0;
2301
2302 if (!args->started) {
2303 args->started = true;
2304 args->start = start;
2305 }
2306
2307 args->size = round_up(start, page_size) + page_size - args->start;
2308
2309 return 0;
2310}
2311
2312static int addr_filter__entire_kernel(struct addr_filter *filt)
2313{
2314 struct sym_args args = { .started = false };
2315 int err;
2316
2317 err = kallsyms__parse("/proc/kallsyms", &args, find_entire_kern_cb);
2318 if (err < 0 || !args.started) {
2319 pr_err("Failed to parse /proc/kallsyms\n");
2320 return err;
2321 }
2322
2323 filt->addr = args.start;
2324 filt->size = args.size;
2325
2326 return 0;
2327}
2328
2329static int check_end_after_start(struct addr_filter *filt, u64 start, u64 size)
2330{
2331 if (start + size >= filt->addr)
2332 return 0;
2333
2334 if (filt->sym_from) {
2335 pr_err("Symbol '%s' (0x%"PRIx64") comes before '%s' (0x%"PRIx64")\n",
2336 filt->sym_to, start, filt->sym_from, filt->addr);
2337 } else {
2338 pr_err("Symbol '%s' (0x%"PRIx64") comes before address 0x%"PRIx64")\n",
2339 filt->sym_to, start, filt->addr);
2340 }
2341
2342 return -EINVAL;
2343}
2344
2345static int addr_filter__resolve_kernel_syms(struct addr_filter *filt)
2346{
2347 bool no_size = false;
2348 u64 start, size;
2349 int err;
2350
2351 if (symbol_conf.kptr_restrict) {
2352 pr_err("Kernel addresses are restricted. Unable to resolve kernel symbols.\n");
2353 return -EINVAL;
2354 }
2355
2356 if (filt->sym_from && !strcmp(filt->sym_from, "*"))
2357 return addr_filter__entire_kernel(filt);
2358
2359 if (filt->sym_from) {
2360 err = find_kern_sym(filt->sym_from, &start, &size,
2361 filt->sym_from_idx);
2362 if (err)
2363 return err;
2364 filt->addr = start;
2365 if (filt->range && !filt->size && !filt->sym_to) {
2366 filt->size = size;
2367 no_size = !size;
2368 }
2369 }
2370
2371 if (filt->sym_to) {
2372 err = find_kern_sym(filt->sym_to, &start, &size,
2373 filt->sym_to_idx);
2374 if (err)
2375 return err;
2376
2377 err = check_end_after_start(filt, start, size);
2378 if (err)
2379 return err;
2380 filt->size = start + size - filt->addr;
2381 no_size = !size;
2382 }
2383
2384
2385 if (no_size) {
2386 pr_err("Cannot determine size of symbol '%s'\n",
2387 filt->sym_to ? filt->sym_to : filt->sym_from);
2388 return -EINVAL;
2389 }
2390
2391 return 0;
2392}
2393
2394static struct dso *load_dso(const char *name)
2395{
2396 struct map *map;
2397 struct dso *dso;
2398
2399 map = dso__new_map(name);
2400 if (!map)
2401 return NULL;
2402
2403 if (map__load(map) < 0)
2404 pr_err("File '%s' not found or has no symbols.\n", name);
2405
2406 dso = dso__get(map->dso);
2407
2408 map__put(map);
2409
2410 return dso;
2411}
2412
2413static bool dso_sym_match(struct symbol *sym, const char *name, int *cnt,
2414 int idx)
2415{
2416
2417 return !arch__compare_symbol_names(name, sym->name) &&
2418 ((!idx && sym->binding == STB_GLOBAL) ||
2419 (idx > 0 && ++*cnt == idx) ||
2420 idx < 0);
2421}
2422
2423static void print_duplicate_syms(struct dso *dso, const char *sym_name)
2424{
2425 struct symbol *sym;
2426 bool near = false;
2427 int cnt = 0;
2428
2429 pr_err("Multiple symbols with name '%s'\n", sym_name);
2430
2431 sym = dso__first_symbol(dso);
2432 while (sym) {
2433 if (dso_sym_match(sym, sym_name, &cnt, -1)) {
2434 pr_err("#%d\t0x%"PRIx64"\t%c\t%s\n",
2435 ++cnt, sym->start,
2436 sym->binding == STB_GLOBAL ? 'g' :
2437 sym->binding == STB_LOCAL ? 'l' : 'w',
2438 sym->name);
2439 near = true;
2440 } else if (near) {
2441 near = false;
2442 pr_err("\t\twhich is near\t\t%s\n", sym->name);
2443 }
2444 sym = dso__next_symbol(sym);
2445 }
2446
2447 pr_err("Disambiguate symbol name by inserting #n after the name e.g. %s #2\n",
2448 sym_name);
2449 pr_err("Or select a global symbol by inserting #0 or #g or #G\n");
2450}
2451
2452static int find_dso_sym(struct dso *dso, const char *sym_name, u64 *start,
2453 u64 *size, int idx)
2454{
2455 struct symbol *sym;
2456 int cnt = 0;
2457
2458 *start = 0;
2459 *size = 0;
2460
2461 sym = dso__first_symbol(dso);
2462 while (sym) {
2463 if (*start) {
2464 if (!*size)
2465 *size = sym->start - *start;
2466 if (idx > 0) {
2467 if (*size)
2468 return 1;
2469 } else if (dso_sym_match(sym, sym_name, &cnt, idx)) {
2470 print_duplicate_syms(dso, sym_name);
2471 return -EINVAL;
2472 }
2473 } else if (dso_sym_match(sym, sym_name, &cnt, idx)) {
2474 *start = sym->start;
2475 *size = sym->end - sym->start;
2476 }
2477 sym = dso__next_symbol(sym);
2478 }
2479
2480 if (!*start)
2481 return sym_not_found_error(sym_name, idx);
2482
2483 return 0;
2484}
2485
2486static int addr_filter__entire_dso(struct addr_filter *filt, struct dso *dso)
2487{
2488 if (dso__data_file_size(dso, NULL)) {
2489 pr_err("Failed to determine filter for %s\nCannot determine file size.\n",
2490 filt->filename);
2491 return -EINVAL;
2492 }
2493
2494 filt->addr = 0;
2495 filt->size = dso->data.file_size;
2496
2497 return 0;
2498}
2499
2500static int addr_filter__resolve_syms(struct addr_filter *filt)
2501{
2502 u64 start, size;
2503 struct dso *dso;
2504 int err = 0;
2505
2506 if (!filt->sym_from && !filt->sym_to)
2507 return 0;
2508
2509 if (!filt->filename)
2510 return addr_filter__resolve_kernel_syms(filt);
2511
2512 dso = load_dso(filt->filename);
2513 if (!dso) {
2514 pr_err("Failed to load symbols from: %s\n", filt->filename);
2515 return -EINVAL;
2516 }
2517
2518 if (filt->sym_from && !strcmp(filt->sym_from, "*")) {
2519 err = addr_filter__entire_dso(filt, dso);
2520 goto put_dso;
2521 }
2522
2523 if (filt->sym_from) {
2524 err = find_dso_sym(dso, filt->sym_from, &start, &size,
2525 filt->sym_from_idx);
2526 if (err)
2527 goto put_dso;
2528 filt->addr = start;
2529 if (filt->range && !filt->size && !filt->sym_to)
2530 filt->size = size;
2531 }
2532
2533 if (filt->sym_to) {
2534 err = find_dso_sym(dso, filt->sym_to, &start, &size,
2535 filt->sym_to_idx);
2536 if (err)
2537 goto put_dso;
2538
2539 err = check_end_after_start(filt, start, size);
2540 if (err)
2541 return err;
2542
2543 filt->size = start + size - filt->addr;
2544 }
2545
2546put_dso:
2547 dso__put(dso);
2548
2549 return err;
2550}
2551
2552static char *addr_filter__to_str(struct addr_filter *filt)
2553{
2554 char filename_buf[PATH_MAX];
2555 const char *at = "";
2556 const char *fn = "";
2557 char *filter;
2558 int err;
2559
2560 if (filt->filename) {
2561 at = "@";
2562 fn = realpath(filt->filename, filename_buf);
2563 if (!fn)
2564 return NULL;
2565 }
2566
2567 if (filt->range) {
2568 err = asprintf(&filter, "%s 0x%"PRIx64"/0x%"PRIx64"%s%s",
2569 filt->action, filt->addr, filt->size, at, fn);
2570 } else {
2571 err = asprintf(&filter, "%s 0x%"PRIx64"%s%s",
2572 filt->action, filt->addr, at, fn);
2573 }
2574
2575 return err < 0 ? NULL : filter;
2576}
2577
2578static int parse_addr_filter(struct evsel *evsel, const char *filter,
2579 int max_nr)
2580{
2581 struct addr_filters filts;
2582 struct addr_filter *filt;
2583 int err;
2584
2585 addr_filters__init(&filts);
2586
2587 err = addr_filters__parse_bare_filter(&filts, filter);
2588 if (err)
2589 goto out_exit;
2590
2591 if (filts.cnt > max_nr) {
2592 pr_err("Error: number of address filters (%d) exceeds maximum (%d)\n",
2593 filts.cnt, max_nr);
2594 err = -EINVAL;
2595 goto out_exit;
2596 }
2597
2598 list_for_each_entry(filt, &filts.head, list) {
2599 char *new_filter;
2600
2601 err = addr_filter__resolve_syms(filt);
2602 if (err)
2603 goto out_exit;
2604
2605 new_filter = addr_filter__to_str(filt);
2606 if (!new_filter) {
2607 err = -ENOMEM;
2608 goto out_exit;
2609 }
2610
2611 if (evsel__append_addr_filter(evsel, new_filter)) {
2612 err = -ENOMEM;
2613 goto out_exit;
2614 }
2615 }
2616
2617out_exit:
2618 addr_filters__exit(&filts);
2619
2620 if (err) {
2621 pr_err("Failed to parse address filter: '%s'\n", filter);
2622 pr_err("Filter format is: filter|start|stop|tracestop <start symbol or address> [/ <end symbol or size>] [@<file name>]\n");
2623 pr_err("Where multiple filters are separated by space or comma.\n");
2624 }
2625
2626 return err;
2627}
2628
2629static int evsel__nr_addr_filter(struct evsel *evsel)
2630{
2631 struct perf_pmu *pmu = evsel__find_pmu(evsel);
2632 int nr_addr_filters = 0;
2633
2634 if (!pmu)
2635 return 0;
2636
2637 perf_pmu__scan_file(pmu, "nr_addr_filters", "%d", &nr_addr_filters);
2638
2639 return nr_addr_filters;
2640}
2641
2642int auxtrace_parse_filters(struct evlist *evlist)
2643{
2644 struct evsel *evsel;
2645 char *filter;
2646 int err, max_nr;
2647
2648 evlist__for_each_entry(evlist, evsel) {
2649 filter = evsel->filter;
2650 max_nr = evsel__nr_addr_filter(evsel);
2651 if (!filter || !max_nr)
2652 continue;
2653 evsel->filter = NULL;
2654 err = parse_addr_filter(evsel, filter, max_nr);
2655 free(filter);
2656 if (err)
2657 return err;
2658 pr_debug("Address filter: %s\n", evsel->filter);
2659 }
2660
2661 return 0;
2662}
2663
2664int auxtrace__process_event(struct perf_session *session, union perf_event *event,
2665 struct perf_sample *sample, struct perf_tool *tool)
2666{
2667 if (!session->auxtrace)
2668 return 0;
2669
2670 return session->auxtrace->process_event(session, event, sample, tool);
2671}
2672
2673void auxtrace__dump_auxtrace_sample(struct perf_session *session,
2674 struct perf_sample *sample)
2675{
2676 if (!session->auxtrace || !session->auxtrace->dump_auxtrace_sample ||
2677 auxtrace__dont_decode(session))
2678 return;
2679
2680 session->auxtrace->dump_auxtrace_sample(session, sample);
2681}
2682
2683int auxtrace__flush_events(struct perf_session *session, struct perf_tool *tool)
2684{
2685 if (!session->auxtrace)
2686 return 0;
2687
2688 return session->auxtrace->flush_events(session, tool);
2689}
2690
2691void auxtrace__free_events(struct perf_session *session)
2692{
2693 if (!session->auxtrace)
2694 return;
2695
2696 return session->auxtrace->free_events(session);
2697}
2698
2699void auxtrace__free(struct perf_session *session)
2700{
2701 if (!session->auxtrace)
2702 return;
2703
2704 return session->auxtrace->free(session);
2705}
2706
2707bool auxtrace__evsel_is_auxtrace(struct perf_session *session,
2708 struct evsel *evsel)
2709{
2710 if (!session->auxtrace || !session->auxtrace->evsel_is_auxtrace)
2711 return false;
2712
2713 return session->auxtrace->evsel_is_auxtrace(session, evsel);
2714}
2715
