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16#include <inttypes.h>
17#include <sys/types.h>
18#include <sys/mman.h>
19#include <stdbool.h>
20#include <string.h>
21#include <limits.h>
22#include <errno.h>
23
24#include <linux/kernel.h>
25#include <linux/perf_event.h>
26#include <linux/types.h>
27#include <linux/bitops.h>
28#include <linux/log2.h>
29#include <linux/string.h>
30
31#include <sys/param.h>
32#include <stdlib.h>
33#include <stdio.h>
34#include <string.h>
35#include <limits.h>
36#include <errno.h>
37#include <linux/list.h>
38
39#include "../perf.h"
40#include "util.h"
41#include "evlist.h"
42#include "dso.h"
43#include "map.h"
44#include "pmu.h"
45#include "evsel.h"
46#include "cpumap.h"
47#include "thread_map.h"
48#include "asm/bug.h"
49#include "auxtrace.h"
50
51#include <linux/hash.h>
52
53#include "event.h"
54#include "session.h"
55#include "debug.h"
56#include <subcmd/parse-options.h>
57
58#include "intel-pt.h"
59#include "intel-bts.h"
60
61#include "sane_ctype.h"
62#include "symbol/kallsyms.h"
63
64int auxtrace_mmap__mmap(struct auxtrace_mmap *mm,
65 struct auxtrace_mmap_params *mp,
66 void *userpg, int fd)
67{
68 struct perf_event_mmap_page *pc = userpg;
69
70 WARN_ONCE(mm->base, "Uninitialized auxtrace_mmap\n");
71
72 mm->userpg = userpg;
73 mm->mask = mp->mask;
74 mm->len = mp->len;
75 mm->prev = 0;
76 mm->idx = mp->idx;
77 mm->tid = mp->tid;
78 mm->cpu = mp->cpu;
79
80 if (!mp->len) {
81 mm->base = NULL;
82 return 0;
83 }
84
85#if BITS_PER_LONG != 64 && !defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
86 pr_err("Cannot use AUX area tracing mmaps\n");
87 return -1;
88#endif
89
90 pc->aux_offset = mp->offset;
91 pc->aux_size = mp->len;
92
93 mm->base = mmap(NULL, mp->len, mp->prot, MAP_SHARED, fd, mp->offset);
94 if (mm->base == MAP_FAILED) {
95 pr_debug2("failed to mmap AUX area\n");
96 mm->base = NULL;
97 return -1;
98 }
99
100 return 0;
101}
102
103void auxtrace_mmap__munmap(struct auxtrace_mmap *mm)
104{
105 if (mm->base) {
106 munmap(mm->base, mm->len);
107 mm->base = NULL;
108 }
109}
110
111void auxtrace_mmap_params__init(struct auxtrace_mmap_params *mp,
112 off_t auxtrace_offset,
113 unsigned int auxtrace_pages,
114 bool auxtrace_overwrite)
115{
116 if (auxtrace_pages) {
117 mp->offset = auxtrace_offset;
118 mp->len = auxtrace_pages * (size_t)page_size;
119 mp->mask = is_power_of_2(mp->len) ? mp->len - 1 : 0;
120 mp->prot = PROT_READ | (auxtrace_overwrite ? 0 : PROT_WRITE);
121 pr_debug2("AUX area mmap length %zu\n", mp->len);
122 } else {
123 mp->len = 0;
124 }
125}
126
127void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp,
128 struct perf_evlist *evlist, int idx,
129 bool per_cpu)
130{
131 mp->idx = idx;
132
133 if (per_cpu) {
134 mp->cpu = evlist->cpus->map[idx];
135 if (evlist->threads)
136 mp->tid = thread_map__pid(evlist->threads, 0);
137 else
138 mp->tid = -1;
139 } else {
140 mp->cpu = -1;
141 mp->tid = thread_map__pid(evlist->threads, idx);
142 }
143}
144
145#define AUXTRACE_INIT_NR_QUEUES 32
146
147static struct auxtrace_queue *auxtrace_alloc_queue_array(unsigned int nr_queues)
148{
149 struct auxtrace_queue *queue_array;
150 unsigned int max_nr_queues, i;
151
152 max_nr_queues = UINT_MAX / sizeof(struct auxtrace_queue);
153 if (nr_queues > max_nr_queues)
154 return NULL;
155
156 queue_array = calloc(nr_queues, sizeof(struct auxtrace_queue));
157 if (!queue_array)
158 return NULL;
159
160 for (i = 0; i < nr_queues; i++) {
161 INIT_LIST_HEAD(&queue_array[i].head);
162 queue_array[i].priv = NULL;
163 }
164
165 return queue_array;
166}
167
168int auxtrace_queues__init(struct auxtrace_queues *queues)
169{
170 queues->nr_queues = AUXTRACE_INIT_NR_QUEUES;
171 queues->queue_array = auxtrace_alloc_queue_array(queues->nr_queues);
172 if (!queues->queue_array)
173 return -ENOMEM;
174 return 0;
175}
176
177static int auxtrace_queues__grow(struct auxtrace_queues *queues,
178 unsigned int new_nr_queues)
179{
180 unsigned int nr_queues = queues->nr_queues;
181 struct auxtrace_queue *queue_array;
182 unsigned int i;
183
184 if (!nr_queues)
185 nr_queues = AUXTRACE_INIT_NR_QUEUES;
186
187 while (nr_queues && nr_queues < new_nr_queues)
188 nr_queues <<= 1;
189
190 if (nr_queues < queues->nr_queues || nr_queues < new_nr_queues)
191 return -EINVAL;
192
193 queue_array = auxtrace_alloc_queue_array(nr_queues);
194 if (!queue_array)
195 return -ENOMEM;
196
197 for (i = 0; i < queues->nr_queues; i++) {
198 list_splice_tail(&queues->queue_array[i].head,
199 &queue_array[i].head);
200 queue_array[i].priv = queues->queue_array[i].priv;
201 }
202
203 queues->nr_queues = nr_queues;
204 queues->queue_array = queue_array;
205
206 return 0;
207}
208
209static void *auxtrace_copy_data(u64 size, struct perf_session *session)
210{
211 int fd = perf_data_file__fd(session->file);
212 void *p;
213 ssize_t ret;
214
215 if (size > SSIZE_MAX)
216 return NULL;
217
218 p = malloc(size);
219 if (!p)
220 return NULL;
221
222 ret = readn(fd, p, size);
223 if (ret != (ssize_t)size) {
224 free(p);
225 return NULL;
226 }
227
228 return p;
229}
230
231static int auxtrace_queues__add_buffer(struct auxtrace_queues *queues,
232 unsigned int idx,
233 struct auxtrace_buffer *buffer)
234{
235 struct auxtrace_queue *queue;
236 int err;
237
238 if (idx >= queues->nr_queues) {
239 err = auxtrace_queues__grow(queues, idx + 1);
240 if (err)
241 return err;
242 }
243
244 queue = &queues->queue_array[idx];
245
246 if (!queue->set) {
247 queue->set = true;
248 queue->tid = buffer->tid;
249 queue->cpu = buffer->cpu;
250 } else if (buffer->cpu != queue->cpu || buffer->tid != queue->tid) {
251 pr_err("auxtrace queue conflict: cpu %d, tid %d vs cpu %d, tid %d\n",
252 queue->cpu, queue->tid, buffer->cpu, buffer->tid);
253 return -EINVAL;
254 }
255
256 buffer->buffer_nr = queues->next_buffer_nr++;
257
258 list_add_tail(&buffer->list, &queue->head);
259
260 queues->new_data = true;
261 queues->populated = true;
262
263 return 0;
264}
265
266
267#define BUFFER_LIMIT_FOR_32_BIT (32 * 1024 * 1024)
268
269static int auxtrace_queues__split_buffer(struct auxtrace_queues *queues,
270 unsigned int idx,
271 struct auxtrace_buffer *buffer)
272{
273 u64 sz = buffer->size;
274 bool consecutive = false;
275 struct auxtrace_buffer *b;
276 int err;
277
278 while (sz > BUFFER_LIMIT_FOR_32_BIT) {
279 b = memdup(buffer, sizeof(struct auxtrace_buffer));
280 if (!b)
281 return -ENOMEM;
282 b->size = BUFFER_LIMIT_FOR_32_BIT;
283 b->consecutive = consecutive;
284 err = auxtrace_queues__add_buffer(queues, idx, b);
285 if (err) {
286 auxtrace_buffer__free(b);
287 return err;
288 }
289 buffer->data_offset += BUFFER_LIMIT_FOR_32_BIT;
290 sz -= BUFFER_LIMIT_FOR_32_BIT;
291 consecutive = true;
292 }
293
294 buffer->size = sz;
295 buffer->consecutive = consecutive;
296
297 return 0;
298}
299
300static int auxtrace_queues__add_event_buffer(struct auxtrace_queues *queues,
301 struct perf_session *session,
302 unsigned int idx,
303 struct auxtrace_buffer *buffer)
304{
305 if (session->one_mmap) {
306 buffer->data = buffer->data_offset - session->one_mmap_offset +
307 session->one_mmap_addr;
308 } else if (perf_data_file__is_pipe(session->file)) {
309 buffer->data = auxtrace_copy_data(buffer->size, session);
310 if (!buffer->data)
311 return -ENOMEM;
312 buffer->data_needs_freeing = true;
313 } else if (BITS_PER_LONG == 32 &&
314 buffer->size > BUFFER_LIMIT_FOR_32_BIT) {
315 int err;
316
317 err = auxtrace_queues__split_buffer(queues, idx, buffer);
318 if (err)
319 return err;
320 }
321
322 return auxtrace_queues__add_buffer(queues, idx, buffer);
323}
324
325int auxtrace_queues__add_event(struct auxtrace_queues *queues,
326 struct perf_session *session,
327 union perf_event *event, off_t data_offset,
328 struct auxtrace_buffer **buffer_ptr)
329{
330 struct auxtrace_buffer *buffer;
331 unsigned int idx;
332 int err;
333
334 buffer = zalloc(sizeof(struct auxtrace_buffer));
335 if (!buffer)
336 return -ENOMEM;
337
338 buffer->pid = -1;
339 buffer->tid = event->auxtrace.tid;
340 buffer->cpu = event->auxtrace.cpu;
341 buffer->data_offset = data_offset;
342 buffer->offset = event->auxtrace.offset;
343 buffer->reference = event->auxtrace.reference;
344 buffer->size = event->auxtrace.size;
345 idx = event->auxtrace.idx;
346
347 err = auxtrace_queues__add_event_buffer(queues, session, idx, buffer);
348 if (err)
349 goto out_err;
350
351 if (buffer_ptr)
352 *buffer_ptr = buffer;
353
354 return 0;
355
356out_err:
357 auxtrace_buffer__free(buffer);
358 return err;
359}
360
361static int auxtrace_queues__add_indexed_event(struct auxtrace_queues *queues,
362 struct perf_session *session,
363 off_t file_offset, size_t sz)
364{
365 union perf_event *event;
366 int err;
367 char buf[PERF_SAMPLE_MAX_SIZE];
368
369 err = perf_session__peek_event(session, file_offset, buf,
370 PERF_SAMPLE_MAX_SIZE, &event, NULL);
371 if (err)
372 return err;
373
374 if (event->header.type == PERF_RECORD_AUXTRACE) {
375 if (event->header.size < sizeof(struct auxtrace_event) ||
376 event->header.size != sz) {
377 err = -EINVAL;
378 goto out;
379 }
380 file_offset += event->header.size;
381 err = auxtrace_queues__add_event(queues, session, event,
382 file_offset, NULL);
383 }
384out:
385 return err;
386}
387
388void auxtrace_queues__free(struct auxtrace_queues *queues)
389{
390 unsigned int i;
391
392 for (i = 0; i < queues->nr_queues; i++) {
393 while (!list_empty(&queues->queue_array[i].head)) {
394 struct auxtrace_buffer *buffer;
395
396 buffer = list_entry(queues->queue_array[i].head.next,
397 struct auxtrace_buffer, list);
398 list_del(&buffer->list);
399 auxtrace_buffer__free(buffer);
400 }
401 }
402
403 zfree(&queues->queue_array);
404 queues->nr_queues = 0;
405}
406
407static void auxtrace_heapify(struct auxtrace_heap_item *heap_array,
408 unsigned int pos, unsigned int queue_nr,
409 u64 ordinal)
410{
411 unsigned int parent;
412
413 while (pos) {
414 parent = (pos - 1) >> 1;
415 if (heap_array[parent].ordinal <= ordinal)
416 break;
417 heap_array[pos] = heap_array[parent];
418 pos = parent;
419 }
420 heap_array[pos].queue_nr = queue_nr;
421 heap_array[pos].ordinal = ordinal;
422}
423
424int auxtrace_heap__add(struct auxtrace_heap *heap, unsigned int queue_nr,
425 u64 ordinal)
426{
427 struct auxtrace_heap_item *heap_array;
428
429 if (queue_nr >= heap->heap_sz) {
430 unsigned int heap_sz = AUXTRACE_INIT_NR_QUEUES;
431
432 while (heap_sz <= queue_nr)
433 heap_sz <<= 1;
434 heap_array = realloc(heap->heap_array,
435 heap_sz * sizeof(struct auxtrace_heap_item));
436 if (!heap_array)
437 return -ENOMEM;
438 heap->heap_array = heap_array;
439 heap->heap_sz = heap_sz;
440 }
441
442 auxtrace_heapify(heap->heap_array, heap->heap_cnt++, queue_nr, ordinal);
443
444 return 0;
445}
446
447void auxtrace_heap__free(struct auxtrace_heap *heap)
448{
449 zfree(&heap->heap_array);
450 heap->heap_cnt = 0;
451 heap->heap_sz = 0;
452}
453
454void auxtrace_heap__pop(struct auxtrace_heap *heap)
455{
456 unsigned int pos, last, heap_cnt = heap->heap_cnt;
457 struct auxtrace_heap_item *heap_array;
458
459 if (!heap_cnt)
460 return;
461
462 heap->heap_cnt -= 1;
463
464 heap_array = heap->heap_array;
465
466 pos = 0;
467 while (1) {
468 unsigned int left, right;
469
470 left = (pos << 1) + 1;
471 if (left >= heap_cnt)
472 break;
473 right = left + 1;
474 if (right >= heap_cnt) {
475 heap_array[pos] = heap_array[left];
476 return;
477 }
478 if (heap_array[left].ordinal < heap_array[right].ordinal) {
479 heap_array[pos] = heap_array[left];
480 pos = left;
481 } else {
482 heap_array[pos] = heap_array[right];
483 pos = right;
484 }
485 }
486
487 last = heap_cnt - 1;
488 auxtrace_heapify(heap_array, pos, heap_array[last].queue_nr,
489 heap_array[last].ordinal);
490}
491
492size_t auxtrace_record__info_priv_size(struct auxtrace_record *itr,
493 struct perf_evlist *evlist)
494{
495 if (itr)
496 return itr->info_priv_size(itr, evlist);
497 return 0;
498}
499
500static int auxtrace_not_supported(void)
501{
502 pr_err("AUX area tracing is not supported on this architecture\n");
503 return -EINVAL;
504}
505
506int auxtrace_record__info_fill(struct auxtrace_record *itr,
507 struct perf_session *session,
508 struct auxtrace_info_event *auxtrace_info,
509 size_t priv_size)
510{
511 if (itr)
512 return itr->info_fill(itr, session, auxtrace_info, priv_size);
513 return auxtrace_not_supported();
514}
515
516void auxtrace_record__free(struct auxtrace_record *itr)
517{
518 if (itr)
519 itr->free(itr);
520}
521
522int auxtrace_record__snapshot_start(struct auxtrace_record *itr)
523{
524 if (itr && itr->snapshot_start)
525 return itr->snapshot_start(itr);
526 return 0;
527}
528
529int auxtrace_record__snapshot_finish(struct auxtrace_record *itr)
530{
531 if (itr && itr->snapshot_finish)
532 return itr->snapshot_finish(itr);
533 return 0;
534}
535
536int auxtrace_record__find_snapshot(struct auxtrace_record *itr, int idx,
537 struct auxtrace_mmap *mm,
538 unsigned char *data, u64 *head, u64 *old)
539{
540 if (itr && itr->find_snapshot)
541 return itr->find_snapshot(itr, idx, mm, data, head, old);
542 return 0;
543}
544
545int auxtrace_record__options(struct auxtrace_record *itr,
546 struct perf_evlist *evlist,
547 struct record_opts *opts)
548{
549 if (itr)
550 return itr->recording_options(itr, evlist, opts);
551 return 0;
552}
553
554u64 auxtrace_record__reference(struct auxtrace_record *itr)
555{
556 if (itr)
557 return itr->reference(itr);
558 return 0;
559}
560
561int auxtrace_parse_snapshot_options(struct auxtrace_record *itr,
562 struct record_opts *opts, const char *str)
563{
564 if (!str)
565 return 0;
566
567 if (itr)
568 return itr->parse_snapshot_options(itr, opts, str);
569
570 pr_err("No AUX area tracing to snapshot\n");
571 return -EINVAL;
572}
573
574struct auxtrace_record *__weak
575auxtrace_record__init(struct perf_evlist *evlist __maybe_unused, int *err)
576{
577 *err = 0;
578 return NULL;
579}
580
581static int auxtrace_index__alloc(struct list_head *head)
582{
583 struct auxtrace_index *auxtrace_index;
584
585 auxtrace_index = malloc(sizeof(struct auxtrace_index));
586 if (!auxtrace_index)
587 return -ENOMEM;
588
589 auxtrace_index->nr = 0;
590 INIT_LIST_HEAD(&auxtrace_index->list);
591
592 list_add_tail(&auxtrace_index->list, head);
593
594 return 0;
595}
596
597void auxtrace_index__free(struct list_head *head)
598{
599 struct auxtrace_index *auxtrace_index, *n;
600
601 list_for_each_entry_safe(auxtrace_index, n, head, list) {
602 list_del(&auxtrace_index->list);
603 free(auxtrace_index);
604 }
605}
606
607static struct auxtrace_index *auxtrace_index__last(struct list_head *head)
608{
609 struct auxtrace_index *auxtrace_index;
610 int err;
611
612 if (list_empty(head)) {
613 err = auxtrace_index__alloc(head);
614 if (err)
615 return NULL;
616 }
617
618 auxtrace_index = list_entry(head->prev, struct auxtrace_index, list);
619
620 if (auxtrace_index->nr >= PERF_AUXTRACE_INDEX_ENTRY_COUNT) {
621 err = auxtrace_index__alloc(head);
622 if (err)
623 return NULL;
624 auxtrace_index = list_entry(head->prev, struct auxtrace_index,
625 list);
626 }
627
628 return auxtrace_index;
629}
630
631int auxtrace_index__auxtrace_event(struct list_head *head,
632 union perf_event *event, off_t file_offset)
633{
634 struct auxtrace_index *auxtrace_index;
635 size_t nr;
636
637 auxtrace_index = auxtrace_index__last(head);
638 if (!auxtrace_index)
639 return -ENOMEM;
640
641 nr = auxtrace_index->nr;
642 auxtrace_index->entries[nr].file_offset = file_offset;
643 auxtrace_index->entries[nr].sz = event->header.size;
644 auxtrace_index->nr += 1;
645
646 return 0;
647}
648
649static int auxtrace_index__do_write(int fd,
650 struct auxtrace_index *auxtrace_index)
651{
652 struct auxtrace_index_entry ent;
653 size_t i;
654
655 for (i = 0; i < auxtrace_index->nr; i++) {
656 ent.file_offset = auxtrace_index->entries[i].file_offset;
657 ent.sz = auxtrace_index->entries[i].sz;
658 if (writen(fd, &ent, sizeof(ent)) != sizeof(ent))
659 return -errno;
660 }
661 return 0;
662}
663
664int auxtrace_index__write(int fd, struct list_head *head)
665{
666 struct auxtrace_index *auxtrace_index;
667 u64 total = 0;
668 int err;
669
670 list_for_each_entry(auxtrace_index, head, list)
671 total += auxtrace_index->nr;
672
673 if (writen(fd, &total, sizeof(total)) != sizeof(total))
674 return -errno;
675
676 list_for_each_entry(auxtrace_index, head, list) {
677 err = auxtrace_index__do_write(fd, auxtrace_index);
678 if (err)
679 return err;
680 }
681
682 return 0;
683}
684
685static int auxtrace_index__process_entry(int fd, struct list_head *head,
686 bool needs_swap)
687{
688 struct auxtrace_index *auxtrace_index;
689 struct auxtrace_index_entry ent;
690 size_t nr;
691
692 if (readn(fd, &ent, sizeof(ent)) != sizeof(ent))
693 return -1;
694
695 auxtrace_index = auxtrace_index__last(head);
696 if (!auxtrace_index)
697 return -1;
698
699 nr = auxtrace_index->nr;
700 if (needs_swap) {
701 auxtrace_index->entries[nr].file_offset =
702 bswap_64(ent.file_offset);
703 auxtrace_index->entries[nr].sz = bswap_64(ent.sz);
704 } else {
705 auxtrace_index->entries[nr].file_offset = ent.file_offset;
706 auxtrace_index->entries[nr].sz = ent.sz;
707 }
708
709 auxtrace_index->nr = nr + 1;
710
711 return 0;
712}
713
714int auxtrace_index__process(int fd, u64 size, struct perf_session *session,
715 bool needs_swap)
716{
717 struct list_head *head = &session->auxtrace_index;
718 u64 nr;
719
720 if (readn(fd, &nr, sizeof(u64)) != sizeof(u64))
721 return -1;
722
723 if (needs_swap)
724 nr = bswap_64(nr);
725
726 if (sizeof(u64) + nr * sizeof(struct auxtrace_index_entry) > size)
727 return -1;
728
729 while (nr--) {
730 int err;
731
732 err = auxtrace_index__process_entry(fd, head, needs_swap);
733 if (err)
734 return -1;
735 }
736
737 return 0;
738}
739
740static int auxtrace_queues__process_index_entry(struct auxtrace_queues *queues,
741 struct perf_session *session,
742 struct auxtrace_index_entry *ent)
743{
744 return auxtrace_queues__add_indexed_event(queues, session,
745 ent->file_offset, ent->sz);
746}
747
748int auxtrace_queues__process_index(struct auxtrace_queues *queues,
749 struct perf_session *session)
750{
751 struct auxtrace_index *auxtrace_index;
752 struct auxtrace_index_entry *ent;
753 size_t i;
754 int err;
755
756 list_for_each_entry(auxtrace_index, &session->auxtrace_index, list) {
757 for (i = 0; i < auxtrace_index->nr; i++) {
758 ent = &auxtrace_index->entries[i];
759 err = auxtrace_queues__process_index_entry(queues,
760 session,
761 ent);
762 if (err)
763 return err;
764 }
765 }
766 return 0;
767}
768
769struct auxtrace_buffer *auxtrace_buffer__next(struct auxtrace_queue *queue,
770 struct auxtrace_buffer *buffer)
771{
772 if (buffer) {
773 if (list_is_last(&buffer->list, &queue->head))
774 return NULL;
775 return list_entry(buffer->list.next, struct auxtrace_buffer,
776 list);
777 } else {
778 if (list_empty(&queue->head))
779 return NULL;
780 return list_entry(queue->head.next, struct auxtrace_buffer,
781 list);
782 }
783}
784
785void *auxtrace_buffer__get_data(struct auxtrace_buffer *buffer, int fd)
786{
787 size_t adj = buffer->data_offset & (page_size - 1);
788 size_t size = buffer->size + adj;
789 off_t file_offset = buffer->data_offset - adj;
790 void *addr;
791
792 if (buffer->data)
793 return buffer->data;
794
795 addr = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, file_offset);
796 if (addr == MAP_FAILED)
797 return NULL;
798
799 buffer->mmap_addr = addr;
800 buffer->mmap_size = size;
801
802 buffer->data = addr + adj;
803
804 return buffer->data;
805}
806
807void auxtrace_buffer__put_data(struct auxtrace_buffer *buffer)
808{
809 if (!buffer->data || !buffer->mmap_addr)
810 return;
811 munmap(buffer->mmap_addr, buffer->mmap_size);
812 buffer->mmap_addr = NULL;
813 buffer->mmap_size = 0;
814 buffer->data = NULL;
815 buffer->use_data = NULL;
816}
817
818void auxtrace_buffer__drop_data(struct auxtrace_buffer *buffer)
819{
820 auxtrace_buffer__put_data(buffer);
821 if (buffer->data_needs_freeing) {
822 buffer->data_needs_freeing = false;
823 zfree(&buffer->data);
824 buffer->use_data = NULL;
825 buffer->size = 0;
826 }
827}
828
829void auxtrace_buffer__free(struct auxtrace_buffer *buffer)
830{
831 auxtrace_buffer__drop_data(buffer);
832 free(buffer);
833}
834
835void auxtrace_synth_error(struct auxtrace_error_event *auxtrace_error, int type,
836 int code, int cpu, pid_t pid, pid_t tid, u64 ip,
837 const char *msg)
838{
839 size_t size;
840
841 memset(auxtrace_error, 0, sizeof(struct auxtrace_error_event));
842
843 auxtrace_error->header.type = PERF_RECORD_AUXTRACE_ERROR;
844 auxtrace_error->type = type;
845 auxtrace_error->code = code;
846 auxtrace_error->cpu = cpu;
847 auxtrace_error->pid = pid;
848 auxtrace_error->tid = tid;
849 auxtrace_error->ip = ip;
850 strlcpy(auxtrace_error->msg, msg, MAX_AUXTRACE_ERROR_MSG);
851
852 size = (void *)auxtrace_error->msg - (void *)auxtrace_error +
853 strlen(auxtrace_error->msg) + 1;
854 auxtrace_error->header.size = PERF_ALIGN(size, sizeof(u64));
855}
856
857int perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr,
858 struct perf_tool *tool,
859 struct perf_session *session,
860 perf_event__handler_t process)
861{
862 union perf_event *ev;
863 size_t priv_size;
864 int err;
865
866 pr_debug2("Synthesizing auxtrace information\n");
867 priv_size = auxtrace_record__info_priv_size(itr, session->evlist);
868 ev = zalloc(sizeof(struct auxtrace_info_event) + priv_size);
869 if (!ev)
870 return -ENOMEM;
871
872 ev->auxtrace_info.header.type = PERF_RECORD_AUXTRACE_INFO;
873 ev->auxtrace_info.header.size = sizeof(struct auxtrace_info_event) +
874 priv_size;
875 err = auxtrace_record__info_fill(itr, session, &ev->auxtrace_info,
876 priv_size);
877 if (err)
878 goto out_free;
879
880 err = process(tool, ev, NULL, NULL);
881out_free:
882 free(ev);
883 return err;
884}
885
886static bool auxtrace__dont_decode(struct perf_session *session)
887{
888 return !session->itrace_synth_opts ||
889 session->itrace_synth_opts->dont_decode;
890}
891
892int perf_event__process_auxtrace_info(struct perf_tool *tool __maybe_unused,
893 union perf_event *event,
894 struct perf_session *session)
895{
896 enum auxtrace_type type = event->auxtrace_info.type;
897
898 if (dump_trace)
899 fprintf(stdout, " type: %u\n", type);
900
901 switch (type) {
902 case PERF_AUXTRACE_INTEL_PT:
903 return intel_pt_process_auxtrace_info(event, session);
904 case PERF_AUXTRACE_INTEL_BTS:
905 return intel_bts_process_auxtrace_info(event, session);
906 case PERF_AUXTRACE_CS_ETM:
907 case PERF_AUXTRACE_UNKNOWN:
908 default:
909 return -EINVAL;
910 }
911}
912
913s64 perf_event__process_auxtrace(struct perf_tool *tool,
914 union perf_event *event,
915 struct perf_session *session)
916{
917 s64 err;
918
919 if (dump_trace)
920 fprintf(stdout, " size: %#"PRIx64" offset: %#"PRIx64" ref: %#"PRIx64" idx: %u tid: %d cpu: %d\n",
921 event->auxtrace.size, event->auxtrace.offset,
922 event->auxtrace.reference, event->auxtrace.idx,
923 event->auxtrace.tid, event->auxtrace.cpu);
924
925 if (auxtrace__dont_decode(session))
926 return event->auxtrace.size;
927
928 if (!session->auxtrace || event->header.type != PERF_RECORD_AUXTRACE)
929 return -EINVAL;
930
931 err = session->auxtrace->process_auxtrace_event(session, event, tool);
932 if (err < 0)
933 return err;
934
935 return event->auxtrace.size;
936}
937
938#define PERF_ITRACE_DEFAULT_PERIOD_TYPE PERF_ITRACE_PERIOD_NANOSECS
939#define PERF_ITRACE_DEFAULT_PERIOD 100000
940#define PERF_ITRACE_DEFAULT_CALLCHAIN_SZ 16
941#define PERF_ITRACE_MAX_CALLCHAIN_SZ 1024
942#define PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ 64
943#define PERF_ITRACE_MAX_LAST_BRANCH_SZ 1024
944
945void itrace_synth_opts__set_default(struct itrace_synth_opts *synth_opts)
946{
947 synth_opts->instructions = true;
948 synth_opts->branches = true;
949 synth_opts->transactions = true;
950 synth_opts->errors = true;
951 synth_opts->period_type = PERF_ITRACE_DEFAULT_PERIOD_TYPE;
952 synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD;
953 synth_opts->callchain_sz = PERF_ITRACE_DEFAULT_CALLCHAIN_SZ;
954 synth_opts->last_branch_sz = PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ;
955 synth_opts->initial_skip = 0;
956}
957
958
959
960
961
962
963int itrace_parse_synth_opts(const struct option *opt, const char *str,
964 int unset)
965{
966 struct itrace_synth_opts *synth_opts = opt->value;
967 const char *p;
968 char *endptr;
969 bool period_type_set = false;
970 bool period_set = false;
971
972 synth_opts->set = true;
973
974 if (unset) {
975 synth_opts->dont_decode = true;
976 return 0;
977 }
978
979 if (!str) {
980 itrace_synth_opts__set_default(synth_opts);
981 return 0;
982 }
983
984 for (p = str; *p;) {
985 switch (*p++) {
986 case 'i':
987 synth_opts->instructions = true;
988 while (*p == ' ' || *p == ',')
989 p += 1;
990 if (isdigit(*p)) {
991 synth_opts->period = strtoull(p, &endptr, 10);
992 period_set = true;
993 p = endptr;
994 while (*p == ' ' || *p == ',')
995 p += 1;
996 switch (*p++) {
997 case 'i':
998 synth_opts->period_type =
999 PERF_ITRACE_PERIOD_INSTRUCTIONS;
1000 period_type_set = true;
1001 break;
1002 case 't':
1003 synth_opts->period_type =
1004 PERF_ITRACE_PERIOD_TICKS;
1005 period_type_set = true;
1006 break;
1007 case 'm':
1008 synth_opts->period *= 1000;
1009
1010 case 'u':
1011 synth_opts->period *= 1000;
1012
1013 case 'n':
1014 if (*p++ != 's')
1015 goto out_err;
1016 synth_opts->period_type =
1017 PERF_ITRACE_PERIOD_NANOSECS;
1018 period_type_set = true;
1019 break;
1020 case '\0':
1021 goto out;
1022 default:
1023 goto out_err;
1024 }
1025 }
1026 break;
1027 case 'b':
1028 synth_opts->branches = true;
1029 break;
1030 case 'x':
1031 synth_opts->transactions = true;
1032 break;
1033 case 'e':
1034 synth_opts->errors = true;
1035 break;
1036 case 'd':
1037 synth_opts->log = true;
1038 break;
1039 case 'c':
1040 synth_opts->branches = true;
1041 synth_opts->calls = true;
1042 break;
1043 case 'r':
1044 synth_opts->branches = true;
1045 synth_opts->returns = true;
1046 break;
1047 case 'g':
1048 synth_opts->callchain = true;
1049 synth_opts->callchain_sz =
1050 PERF_ITRACE_DEFAULT_CALLCHAIN_SZ;
1051 while (*p == ' ' || *p == ',')
1052 p += 1;
1053 if (isdigit(*p)) {
1054 unsigned int val;
1055
1056 val = strtoul(p, &endptr, 10);
1057 p = endptr;
1058 if (!val || val > PERF_ITRACE_MAX_CALLCHAIN_SZ)
1059 goto out_err;
1060 synth_opts->callchain_sz = val;
1061 }
1062 break;
1063 case 'l':
1064 synth_opts->last_branch = true;
1065 synth_opts->last_branch_sz =
1066 PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ;
1067 while (*p == ' ' || *p == ',')
1068 p += 1;
1069 if (isdigit(*p)) {
1070 unsigned int val;
1071
1072 val = strtoul(p, &endptr, 10);
1073 p = endptr;
1074 if (!val ||
1075 val > PERF_ITRACE_MAX_LAST_BRANCH_SZ)
1076 goto out_err;
1077 synth_opts->last_branch_sz = val;
1078 }
1079 break;
1080 case 's':
1081 synth_opts->initial_skip = strtoul(p, &endptr, 10);
1082 if (p == endptr)
1083 goto out_err;
1084 p = endptr;
1085 break;
1086 case ' ':
1087 case ',':
1088 break;
1089 default:
1090 goto out_err;
1091 }
1092 }
1093out:
1094 if (synth_opts->instructions) {
1095 if (!period_type_set)
1096 synth_opts->period_type =
1097 PERF_ITRACE_DEFAULT_PERIOD_TYPE;
1098 if (!period_set)
1099 synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD;
1100 }
1101
1102 return 0;
1103
1104out_err:
1105 pr_err("Bad Instruction Tracing options '%s'\n", str);
1106 return -EINVAL;
1107}
1108
1109static const char * const auxtrace_error_type_name[] = {
1110 [PERF_AUXTRACE_ERROR_ITRACE] = "instruction trace",
1111};
1112
1113static const char *auxtrace_error_name(int type)
1114{
1115 const char *error_type_name = NULL;
1116
1117 if (type < PERF_AUXTRACE_ERROR_MAX)
1118 error_type_name = auxtrace_error_type_name[type];
1119 if (!error_type_name)
1120 error_type_name = "unknown AUX";
1121 return error_type_name;
1122}
1123
1124size_t perf_event__fprintf_auxtrace_error(union perf_event *event, FILE *fp)
1125{
1126 struct auxtrace_error_event *e = &event->auxtrace_error;
1127 int ret;
1128
1129 ret = fprintf(fp, " %s error type %u",
1130 auxtrace_error_name(e->type), e->type);
1131 ret += fprintf(fp, " cpu %d pid %d tid %d ip %#"PRIx64" code %u: %s\n",
1132 e->cpu, e->pid, e->tid, e->ip, e->code, e->msg);
1133 return ret;
1134}
1135
1136void perf_session__auxtrace_error_inc(struct perf_session *session,
1137 union perf_event *event)
1138{
1139 struct auxtrace_error_event *e = &event->auxtrace_error;
1140
1141 if (e->type < PERF_AUXTRACE_ERROR_MAX)
1142 session->evlist->stats.nr_auxtrace_errors[e->type] += 1;
1143}
1144
1145void events_stats__auxtrace_error_warn(const struct events_stats *stats)
1146{
1147 int i;
1148
1149 for (i = 0; i < PERF_AUXTRACE_ERROR_MAX; i++) {
1150 if (!stats->nr_auxtrace_errors[i])
1151 continue;
1152 ui__warning("%u %s errors\n",
1153 stats->nr_auxtrace_errors[i],
1154 auxtrace_error_name(i));
1155 }
1156}
1157
1158int perf_event__process_auxtrace_error(struct perf_tool *tool __maybe_unused,
1159 union perf_event *event,
1160 struct perf_session *session)
1161{
1162 if (auxtrace__dont_decode(session))
1163 return 0;
1164
1165 perf_event__fprintf_auxtrace_error(event, stdout);
1166 return 0;
1167}
1168
1169static int __auxtrace_mmap__read(struct auxtrace_mmap *mm,
1170 struct auxtrace_record *itr,
1171 struct perf_tool *tool, process_auxtrace_t fn,
1172 bool snapshot, size_t snapshot_size)
1173{
1174 u64 head, old = mm->prev, offset, ref;
1175 unsigned char *data = mm->base;
1176 size_t size, head_off, old_off, len1, len2, padding;
1177 union perf_event ev;
1178 void *data1, *data2;
1179
1180 if (snapshot) {
1181 head = auxtrace_mmap__read_snapshot_head(mm);
1182 if (auxtrace_record__find_snapshot(itr, mm->idx, mm, data,
1183 &head, &old))
1184 return -1;
1185 } else {
1186 head = auxtrace_mmap__read_head(mm);
1187 }
1188
1189 if (old == head)
1190 return 0;
1191
1192 pr_debug3("auxtrace idx %d old %#"PRIx64" head %#"PRIx64" diff %#"PRIx64"\n",
1193 mm->idx, old, head, head - old);
1194
1195 if (mm->mask) {
1196 head_off = head & mm->mask;
1197 old_off = old & mm->mask;
1198 } else {
1199 head_off = head % mm->len;
1200 old_off = old % mm->len;
1201 }
1202
1203 if (head_off > old_off)
1204 size = head_off - old_off;
1205 else
1206 size = mm->len - (old_off - head_off);
1207
1208 if (snapshot && size > snapshot_size)
1209 size = snapshot_size;
1210
1211 ref = auxtrace_record__reference(itr);
1212
1213 if (head > old || size <= head || mm->mask) {
1214 offset = head - size;
1215 } else {
1216
1217
1218
1219
1220
1221 u64 rem = (0ULL - mm->len) % mm->len;
1222
1223 offset = head - size - rem;
1224 }
1225
1226 if (size > head_off) {
1227 len1 = size - head_off;
1228 data1 = &data[mm->len - len1];
1229 len2 = head_off;
1230 data2 = &data[0];
1231 } else {
1232 len1 = size;
1233 data1 = &data[head_off - len1];
1234 len2 = 0;
1235 data2 = NULL;
1236 }
1237
1238 if (itr->alignment) {
1239 unsigned int unwanted = len1 % itr->alignment;
1240
1241 len1 -= unwanted;
1242 size -= unwanted;
1243 }
1244
1245
1246 padding = size & 7;
1247 if (padding)
1248 padding = 8 - padding;
1249
1250 memset(&ev, 0, sizeof(ev));
1251 ev.auxtrace.header.type = PERF_RECORD_AUXTRACE;
1252 ev.auxtrace.header.size = sizeof(ev.auxtrace);
1253 ev.auxtrace.size = size + padding;
1254 ev.auxtrace.offset = offset;
1255 ev.auxtrace.reference = ref;
1256 ev.auxtrace.idx = mm->idx;
1257 ev.auxtrace.tid = mm->tid;
1258 ev.auxtrace.cpu = mm->cpu;
1259
1260 if (fn(tool, &ev, data1, len1, data2, len2))
1261 return -1;
1262
1263 mm->prev = head;
1264
1265 if (!snapshot) {
1266 auxtrace_mmap__write_tail(mm, head);
1267 if (itr->read_finish) {
1268 int err;
1269
1270 err = itr->read_finish(itr, mm->idx);
1271 if (err < 0)
1272 return err;
1273 }
1274 }
1275
1276 return 1;
1277}
1278
1279int auxtrace_mmap__read(struct auxtrace_mmap *mm, struct auxtrace_record *itr,
1280 struct perf_tool *tool, process_auxtrace_t fn)
1281{
1282 return __auxtrace_mmap__read(mm, itr, tool, fn, false, 0);
1283}
1284
1285int auxtrace_mmap__read_snapshot(struct auxtrace_mmap *mm,
1286 struct auxtrace_record *itr,
1287 struct perf_tool *tool, process_auxtrace_t fn,
1288 size_t snapshot_size)
1289{
1290 return __auxtrace_mmap__read(mm, itr, tool, fn, true, snapshot_size);
1291}
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303struct auxtrace_cache {
1304 struct hlist_head *hashtable;
1305 size_t sz;
1306 size_t entry_size;
1307 size_t limit;
1308 size_t cnt;
1309 unsigned int bits;
1310};
1311
1312struct auxtrace_cache *auxtrace_cache__new(unsigned int bits, size_t entry_size,
1313 unsigned int limit_percent)
1314{
1315 struct auxtrace_cache *c;
1316 struct hlist_head *ht;
1317 size_t sz, i;
1318
1319 c = zalloc(sizeof(struct auxtrace_cache));
1320 if (!c)
1321 return NULL;
1322
1323 sz = 1UL << bits;
1324
1325 ht = calloc(sz, sizeof(struct hlist_head));
1326 if (!ht)
1327 goto out_free;
1328
1329 for (i = 0; i < sz; i++)
1330 INIT_HLIST_HEAD(&ht[i]);
1331
1332 c->hashtable = ht;
1333 c->sz = sz;
1334 c->entry_size = entry_size;
1335 c->limit = (c->sz * limit_percent) / 100;
1336 c->bits = bits;
1337
1338 return c;
1339
1340out_free:
1341 free(c);
1342 return NULL;
1343}
1344
1345static void auxtrace_cache__drop(struct auxtrace_cache *c)
1346{
1347 struct auxtrace_cache_entry *entry;
1348 struct hlist_node *tmp;
1349 size_t i;
1350
1351 if (!c)
1352 return;
1353
1354 for (i = 0; i < c->sz; i++) {
1355 hlist_for_each_entry_safe(entry, tmp, &c->hashtable[i], hash) {
1356 hlist_del(&entry->hash);
1357 auxtrace_cache__free_entry(c, entry);
1358 }
1359 }
1360
1361 c->cnt = 0;
1362}
1363
1364void auxtrace_cache__free(struct auxtrace_cache *c)
1365{
1366 if (!c)
1367 return;
1368
1369 auxtrace_cache__drop(c);
1370 free(c->hashtable);
1371 free(c);
1372}
1373
1374void *auxtrace_cache__alloc_entry(struct auxtrace_cache *c)
1375{
1376 return malloc(c->entry_size);
1377}
1378
1379void auxtrace_cache__free_entry(struct auxtrace_cache *c __maybe_unused,
1380 void *entry)
1381{
1382 free(entry);
1383}
1384
1385int auxtrace_cache__add(struct auxtrace_cache *c, u32 key,
1386 struct auxtrace_cache_entry *entry)
1387{
1388 if (c->limit && ++c->cnt > c->limit)
1389 auxtrace_cache__drop(c);
1390
1391 entry->key = key;
1392 hlist_add_head(&entry->hash, &c->hashtable[hash_32(key, c->bits)]);
1393
1394 return 0;
1395}
1396
1397void *auxtrace_cache__lookup(struct auxtrace_cache *c, u32 key)
1398{
1399 struct auxtrace_cache_entry *entry;
1400 struct hlist_head *hlist;
1401
1402 if (!c)
1403 return NULL;
1404
1405 hlist = &c->hashtable[hash_32(key, c->bits)];
1406 hlist_for_each_entry(entry, hlist, hash) {
1407 if (entry->key == key)
1408 return entry;
1409 }
1410
1411 return NULL;
1412}
1413
1414static void addr_filter__free_str(struct addr_filter *filt)
1415{
1416 free(filt->str);
1417 filt->action = NULL;
1418 filt->sym_from = NULL;
1419 filt->sym_to = NULL;
1420 filt->filename = NULL;
1421 filt->str = NULL;
1422}
1423
1424static struct addr_filter *addr_filter__new(void)
1425{
1426 struct addr_filter *filt = zalloc(sizeof(*filt));
1427
1428 if (filt)
1429 INIT_LIST_HEAD(&filt->list);
1430
1431 return filt;
1432}
1433
1434static void addr_filter__free(struct addr_filter *filt)
1435{
1436 if (filt)
1437 addr_filter__free_str(filt);
1438 free(filt);
1439}
1440
1441static void addr_filters__add(struct addr_filters *filts,
1442 struct addr_filter *filt)
1443{
1444 list_add_tail(&filt->list, &filts->head);
1445 filts->cnt += 1;
1446}
1447
1448static void addr_filters__del(struct addr_filters *filts,
1449 struct addr_filter *filt)
1450{
1451 list_del_init(&filt->list);
1452 filts->cnt -= 1;
1453}
1454
1455void addr_filters__init(struct addr_filters *filts)
1456{
1457 INIT_LIST_HEAD(&filts->head);
1458 filts->cnt = 0;
1459}
1460
1461void addr_filters__exit(struct addr_filters *filts)
1462{
1463 struct addr_filter *filt, *n;
1464
1465 list_for_each_entry_safe(filt, n, &filts->head, list) {
1466 addr_filters__del(filts, filt);
1467 addr_filter__free(filt);
1468 }
1469}
1470
1471static int parse_num_or_str(char **inp, u64 *num, const char **str,
1472 const char *str_delim)
1473{
1474 *inp += strspn(*inp, " ");
1475
1476 if (isdigit(**inp)) {
1477 char *endptr;
1478
1479 if (!num)
1480 return -EINVAL;
1481 errno = 0;
1482 *num = strtoull(*inp, &endptr, 0);
1483 if (errno)
1484 return -errno;
1485 if (endptr == *inp)
1486 return -EINVAL;
1487 *inp = endptr;
1488 } else {
1489 size_t n;
1490
1491 if (!str)
1492 return -EINVAL;
1493 *inp += strspn(*inp, " ");
1494 *str = *inp;
1495 n = strcspn(*inp, str_delim);
1496 if (!n)
1497 return -EINVAL;
1498 *inp += n;
1499 if (**inp) {
1500 **inp = '\0';
1501 *inp += 1;
1502 }
1503 }
1504 return 0;
1505}
1506
1507static int parse_action(struct addr_filter *filt)
1508{
1509 if (!strcmp(filt->action, "filter")) {
1510 filt->start = true;
1511 filt->range = true;
1512 } else if (!strcmp(filt->action, "start")) {
1513 filt->start = true;
1514 } else if (!strcmp(filt->action, "stop")) {
1515 filt->start = false;
1516 } else if (!strcmp(filt->action, "tracestop")) {
1517 filt->start = false;
1518 filt->range = true;
1519 filt->action += 5;
1520 } else {
1521 return -EINVAL;
1522 }
1523 return 0;
1524}
1525
1526static int parse_sym_idx(char **inp, int *idx)
1527{
1528 *idx = -1;
1529
1530 *inp += strspn(*inp, " ");
1531
1532 if (**inp != '#')
1533 return 0;
1534
1535 *inp += 1;
1536
1537 if (**inp == 'g' || **inp == 'G') {
1538 *inp += 1;
1539 *idx = 0;
1540 } else {
1541 unsigned long num;
1542 char *endptr;
1543
1544 errno = 0;
1545 num = strtoul(*inp, &endptr, 0);
1546 if (errno)
1547 return -errno;
1548 if (endptr == *inp || num > INT_MAX)
1549 return -EINVAL;
1550 *inp = endptr;
1551 *idx = num;
1552 }
1553
1554 return 0;
1555}
1556
1557static int parse_addr_size(char **inp, u64 *num, const char **str, int *idx)
1558{
1559 int err = parse_num_or_str(inp, num, str, " ");
1560
1561 if (!err && *str)
1562 err = parse_sym_idx(inp, idx);
1563
1564 return err;
1565}
1566
1567static int parse_one_filter(struct addr_filter *filt, const char **filter_inp)
1568{
1569 char *fstr;
1570 int err;
1571
1572 filt->str = fstr = strdup(*filter_inp);
1573 if (!fstr)
1574 return -ENOMEM;
1575
1576 err = parse_num_or_str(&fstr, NULL, &filt->action, " ");
1577 if (err)
1578 goto out_err;
1579
1580 err = parse_action(filt);
1581 if (err)
1582 goto out_err;
1583
1584 err = parse_addr_size(&fstr, &filt->addr, &filt->sym_from,
1585 &filt->sym_from_idx);
1586 if (err)
1587 goto out_err;
1588
1589 fstr += strspn(fstr, " ");
1590
1591 if (*fstr == '/') {
1592 fstr += 1;
1593 err = parse_addr_size(&fstr, &filt->size, &filt->sym_to,
1594 &filt->sym_to_idx);
1595 if (err)
1596 goto out_err;
1597 filt->range = true;
1598 }
1599
1600 fstr += strspn(fstr, " ");
1601
1602 if (*fstr == '@') {
1603 fstr += 1;
1604 err = parse_num_or_str(&fstr, NULL, &filt->filename, " ,");
1605 if (err)
1606 goto out_err;
1607 }
1608
1609 fstr += strspn(fstr, " ,");
1610
1611 *filter_inp += fstr - filt->str;
1612
1613 return 0;
1614
1615out_err:
1616 addr_filter__free_str(filt);
1617
1618 return err;
1619}
1620
1621int addr_filters__parse_bare_filter(struct addr_filters *filts,
1622 const char *filter)
1623{
1624 struct addr_filter *filt;
1625 const char *fstr = filter;
1626 int err;
1627
1628 while (*fstr) {
1629 filt = addr_filter__new();
1630 err = parse_one_filter(filt, &fstr);
1631 if (err) {
1632 addr_filter__free(filt);
1633 addr_filters__exit(filts);
1634 return err;
1635 }
1636 addr_filters__add(filts, filt);
1637 }
1638
1639 return 0;
1640}
1641
1642struct sym_args {
1643 const char *name;
1644 u64 start;
1645 u64 size;
1646 int idx;
1647 int cnt;
1648 bool started;
1649 bool global;
1650 bool selected;
1651 bool duplicate;
1652 bool near;
1653};
1654
1655static bool kern_sym_match(struct sym_args *args, const char *name, char type)
1656{
1657
1658 return symbol_type__is_a(type, MAP__FUNCTION) &&
1659 !strcmp(name, args->name) &&
1660 ((args->global && isupper(type)) ||
1661 (args->selected && ++(args->cnt) == args->idx) ||
1662 (!args->global && !args->selected));
1663}
1664
1665static int find_kern_sym_cb(void *arg, const char *name, char type, u64 start)
1666{
1667 struct sym_args *args = arg;
1668
1669 if (args->started) {
1670 if (!args->size)
1671 args->size = start - args->start;
1672 if (args->selected) {
1673 if (args->size)
1674 return 1;
1675 } else if (kern_sym_match(args, name, type)) {
1676 args->duplicate = true;
1677 return 1;
1678 }
1679 } else if (kern_sym_match(args, name, type)) {
1680 args->started = true;
1681 args->start = start;
1682 }
1683
1684 return 0;
1685}
1686
1687static int print_kern_sym_cb(void *arg, const char *name, char type, u64 start)
1688{
1689 struct sym_args *args = arg;
1690
1691 if (kern_sym_match(args, name, type)) {
1692 pr_err("#%d\t0x%"PRIx64"\t%c\t%s\n",
1693 ++args->cnt, start, type, name);
1694 args->near = true;
1695 } else if (args->near) {
1696 args->near = false;
1697 pr_err("\t\twhich is near\t\t%s\n", name);
1698 }
1699
1700 return 0;
1701}
1702
1703static int sym_not_found_error(const char *sym_name, int idx)
1704{
1705 if (idx > 0) {
1706 pr_err("N'th occurrence (N=%d) of symbol '%s' not found.\n",
1707 idx, sym_name);
1708 } else if (!idx) {
1709 pr_err("Global symbol '%s' not found.\n", sym_name);
1710 } else {
1711 pr_err("Symbol '%s' not found.\n", sym_name);
1712 }
1713 pr_err("Note that symbols must be functions.\n");
1714
1715 return -EINVAL;
1716}
1717
1718static int find_kern_sym(const char *sym_name, u64 *start, u64 *size, int idx)
1719{
1720 struct sym_args args = {
1721 .name = sym_name,
1722 .idx = idx,
1723 .global = !idx,
1724 .selected = idx > 0,
1725 };
1726 int err;
1727
1728 *start = 0;
1729 *size = 0;
1730
1731 err = kallsyms__parse("/proc/kallsyms", &args, find_kern_sym_cb);
1732 if (err < 0) {
1733 pr_err("Failed to parse /proc/kallsyms\n");
1734 return err;
1735 }
1736
1737 if (args.duplicate) {
1738 pr_err("Multiple kernel symbols with name '%s'\n", sym_name);
1739 args.cnt = 0;
1740 kallsyms__parse("/proc/kallsyms", &args, print_kern_sym_cb);
1741 pr_err("Disambiguate symbol name by inserting #n after the name e.g. %s #2\n",
1742 sym_name);
1743 pr_err("Or select a global symbol by inserting #0 or #g or #G\n");
1744 return -EINVAL;
1745 }
1746
1747 if (!args.started) {
1748 pr_err("Kernel symbol lookup: ");
1749 return sym_not_found_error(sym_name, idx);
1750 }
1751
1752 *start = args.start;
1753 *size = args.size;
1754
1755 return 0;
1756}
1757
1758static int find_entire_kern_cb(void *arg, const char *name __maybe_unused,
1759 char type, u64 start)
1760{
1761 struct sym_args *args = arg;
1762
1763 if (!symbol_type__is_a(type, MAP__FUNCTION))
1764 return 0;
1765
1766 if (!args->started) {
1767 args->started = true;
1768 args->start = start;
1769 }
1770
1771 args->size = round_up(start, page_size) + page_size - args->start;
1772
1773 return 0;
1774}
1775
1776static int addr_filter__entire_kernel(struct addr_filter *filt)
1777{
1778 struct sym_args args = { .started = false };
1779 int err;
1780
1781 err = kallsyms__parse("/proc/kallsyms", &args, find_entire_kern_cb);
1782 if (err < 0 || !args.started) {
1783 pr_err("Failed to parse /proc/kallsyms\n");
1784 return err;
1785 }
1786
1787 filt->addr = args.start;
1788 filt->size = args.size;
1789
1790 return 0;
1791}
1792
1793static int check_end_after_start(struct addr_filter *filt, u64 start, u64 size)
1794{
1795 if (start + size >= filt->addr)
1796 return 0;
1797
1798 if (filt->sym_from) {
1799 pr_err("Symbol '%s' (0x%"PRIx64") comes before '%s' (0x%"PRIx64")\n",
1800 filt->sym_to, start, filt->sym_from, filt->addr);
1801 } else {
1802 pr_err("Symbol '%s' (0x%"PRIx64") comes before address 0x%"PRIx64")\n",
1803 filt->sym_to, start, filt->addr);
1804 }
1805
1806 return -EINVAL;
1807}
1808
1809static int addr_filter__resolve_kernel_syms(struct addr_filter *filt)
1810{
1811 bool no_size = false;
1812 u64 start, size;
1813 int err;
1814
1815 if (symbol_conf.kptr_restrict) {
1816 pr_err("Kernel addresses are restricted. Unable to resolve kernel symbols.\n");
1817 return -EINVAL;
1818 }
1819
1820 if (filt->sym_from && !strcmp(filt->sym_from, "*"))
1821 return addr_filter__entire_kernel(filt);
1822
1823 if (filt->sym_from) {
1824 err = find_kern_sym(filt->sym_from, &start, &size,
1825 filt->sym_from_idx);
1826 if (err)
1827 return err;
1828 filt->addr = start;
1829 if (filt->range && !filt->size && !filt->sym_to) {
1830 filt->size = size;
1831 no_size = !size;
1832 }
1833 }
1834
1835 if (filt->sym_to) {
1836 err = find_kern_sym(filt->sym_to, &start, &size,
1837 filt->sym_to_idx);
1838 if (err)
1839 return err;
1840
1841 err = check_end_after_start(filt, start, size);
1842 if (err)
1843 return err;
1844 filt->size = start + size - filt->addr;
1845 no_size = !size;
1846 }
1847
1848
1849 if (no_size) {
1850 pr_err("Cannot determine size of symbol '%s'\n",
1851 filt->sym_to ? filt->sym_to : filt->sym_from);
1852 return -EINVAL;
1853 }
1854
1855 return 0;
1856}
1857
1858static struct dso *load_dso(const char *name)
1859{
1860 struct map *map;
1861 struct dso *dso;
1862
1863 map = dso__new_map(name);
1864 if (!map)
1865 return NULL;
1866
1867 map__load(map);
1868
1869 dso = dso__get(map->dso);
1870
1871 map__put(map);
1872
1873 return dso;
1874}
1875
1876static bool dso_sym_match(struct symbol *sym, const char *name, int *cnt,
1877 int idx)
1878{
1879
1880 return !arch__compare_symbol_names(name, sym->name) &&
1881 ((!idx && sym->binding == STB_GLOBAL) ||
1882 (idx > 0 && ++*cnt == idx) ||
1883 idx < 0);
1884}
1885
1886static void print_duplicate_syms(struct dso *dso, const char *sym_name)
1887{
1888 struct symbol *sym;
1889 bool near = false;
1890 int cnt = 0;
1891
1892 pr_err("Multiple symbols with name '%s'\n", sym_name);
1893
1894 sym = dso__first_symbol(dso, MAP__FUNCTION);
1895 while (sym) {
1896 if (dso_sym_match(sym, sym_name, &cnt, -1)) {
1897 pr_err("#%d\t0x%"PRIx64"\t%c\t%s\n",
1898 ++cnt, sym->start,
1899 sym->binding == STB_GLOBAL ? 'g' :
1900 sym->binding == STB_LOCAL ? 'l' : 'w',
1901 sym->name);
1902 near = true;
1903 } else if (near) {
1904 near = false;
1905 pr_err("\t\twhich is near\t\t%s\n", sym->name);
1906 }
1907 sym = dso__next_symbol(sym);
1908 }
1909
1910 pr_err("Disambiguate symbol name by inserting #n after the name e.g. %s #2\n",
1911 sym_name);
1912 pr_err("Or select a global symbol by inserting #0 or #g or #G\n");
1913}
1914
1915static int find_dso_sym(struct dso *dso, const char *sym_name, u64 *start,
1916 u64 *size, int idx)
1917{
1918 struct symbol *sym;
1919 int cnt = 0;
1920
1921 *start = 0;
1922 *size = 0;
1923
1924 sym = dso__first_symbol(dso, MAP__FUNCTION);
1925 while (sym) {
1926 if (*start) {
1927 if (!*size)
1928 *size = sym->start - *start;
1929 if (idx > 0) {
1930 if (*size)
1931 return 1;
1932 } else if (dso_sym_match(sym, sym_name, &cnt, idx)) {
1933 print_duplicate_syms(dso, sym_name);
1934 return -EINVAL;
1935 }
1936 } else if (dso_sym_match(sym, sym_name, &cnt, idx)) {
1937 *start = sym->start;
1938 *size = sym->end - sym->start;
1939 }
1940 sym = dso__next_symbol(sym);
1941 }
1942
1943 if (!*start)
1944 return sym_not_found_error(sym_name, idx);
1945
1946 return 0;
1947}
1948
1949static int addr_filter__entire_dso(struct addr_filter *filt, struct dso *dso)
1950{
1951 struct symbol *first_sym = dso__first_symbol(dso, MAP__FUNCTION);
1952 struct symbol *last_sym = dso__last_symbol(dso, MAP__FUNCTION);
1953
1954 if (!first_sym || !last_sym) {
1955 pr_err("Failed to determine filter for %s\nNo symbols found.\n",
1956 filt->filename);
1957 return -EINVAL;
1958 }
1959
1960 filt->addr = first_sym->start;
1961 filt->size = last_sym->end - first_sym->start;
1962
1963 return 0;
1964}
1965
1966static int addr_filter__resolve_syms(struct addr_filter *filt)
1967{
1968 u64 start, size;
1969 struct dso *dso;
1970 int err = 0;
1971
1972 if (!filt->sym_from && !filt->sym_to)
1973 return 0;
1974
1975 if (!filt->filename)
1976 return addr_filter__resolve_kernel_syms(filt);
1977
1978 dso = load_dso(filt->filename);
1979 if (!dso) {
1980 pr_err("Failed to load symbols from: %s\n", filt->filename);
1981 return -EINVAL;
1982 }
1983
1984 if (filt->sym_from && !strcmp(filt->sym_from, "*")) {
1985 err = addr_filter__entire_dso(filt, dso);
1986 goto put_dso;
1987 }
1988
1989 if (filt->sym_from) {
1990 err = find_dso_sym(dso, filt->sym_from, &start, &size,
1991 filt->sym_from_idx);
1992 if (err)
1993 goto put_dso;
1994 filt->addr = start;
1995 if (filt->range && !filt->size && !filt->sym_to)
1996 filt->size = size;
1997 }
1998
1999 if (filt->sym_to) {
2000 err = find_dso_sym(dso, filt->sym_to, &start, &size,
2001 filt->sym_to_idx);
2002 if (err)
2003 goto put_dso;
2004
2005 err = check_end_after_start(filt, start, size);
2006 if (err)
2007 return err;
2008
2009 filt->size = start + size - filt->addr;
2010 }
2011
2012put_dso:
2013 dso__put(dso);
2014
2015 return err;
2016}
2017
2018static char *addr_filter__to_str(struct addr_filter *filt)
2019{
2020 char filename_buf[PATH_MAX];
2021 const char *at = "";
2022 const char *fn = "";
2023 char *filter;
2024 int err;
2025
2026 if (filt->filename) {
2027 at = "@";
2028 fn = realpath(filt->filename, filename_buf);
2029 if (!fn)
2030 return NULL;
2031 }
2032
2033 if (filt->range) {
2034 err = asprintf(&filter, "%s 0x%"PRIx64"/0x%"PRIx64"%s%s",
2035 filt->action, filt->addr, filt->size, at, fn);
2036 } else {
2037 err = asprintf(&filter, "%s 0x%"PRIx64"%s%s",
2038 filt->action, filt->addr, at, fn);
2039 }
2040
2041 return err < 0 ? NULL : filter;
2042}
2043
2044static int parse_addr_filter(struct perf_evsel *evsel, const char *filter,
2045 int max_nr)
2046{
2047 struct addr_filters filts;
2048 struct addr_filter *filt;
2049 int err;
2050
2051 addr_filters__init(&filts);
2052
2053 err = addr_filters__parse_bare_filter(&filts, filter);
2054 if (err)
2055 goto out_exit;
2056
2057 if (filts.cnt > max_nr) {
2058 pr_err("Error: number of address filters (%d) exceeds maximum (%d)\n",
2059 filts.cnt, max_nr);
2060 err = -EINVAL;
2061 goto out_exit;
2062 }
2063
2064 list_for_each_entry(filt, &filts.head, list) {
2065 char *new_filter;
2066
2067 err = addr_filter__resolve_syms(filt);
2068 if (err)
2069 goto out_exit;
2070
2071 new_filter = addr_filter__to_str(filt);
2072 if (!new_filter) {
2073 err = -ENOMEM;
2074 goto out_exit;
2075 }
2076
2077 if (perf_evsel__append_addr_filter(evsel, new_filter)) {
2078 err = -ENOMEM;
2079 goto out_exit;
2080 }
2081 }
2082
2083out_exit:
2084 addr_filters__exit(&filts);
2085
2086 if (err) {
2087 pr_err("Failed to parse address filter: '%s'\n", filter);
2088 pr_err("Filter format is: filter|start|stop|tracestop <start symbol or address> [/ <end symbol or size>] [@<file name>]\n");
2089 pr_err("Where multiple filters are separated by space or comma.\n");
2090 }
2091
2092 return err;
2093}
2094
2095static struct perf_pmu *perf_evsel__find_pmu(struct perf_evsel *evsel)
2096{
2097 struct perf_pmu *pmu = NULL;
2098
2099 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
2100 if (pmu->type == evsel->attr.type)
2101 break;
2102 }
2103
2104 return pmu;
2105}
2106
2107static int perf_evsel__nr_addr_filter(struct perf_evsel *evsel)
2108{
2109 struct perf_pmu *pmu = perf_evsel__find_pmu(evsel);
2110 int nr_addr_filters = 0;
2111
2112 if (!pmu)
2113 return 0;
2114
2115 perf_pmu__scan_file(pmu, "nr_addr_filters", "%d", &nr_addr_filters);
2116
2117 return nr_addr_filters;
2118}
2119
2120int auxtrace_parse_filters(struct perf_evlist *evlist)
2121{
2122 struct perf_evsel *evsel;
2123 char *filter;
2124 int err, max_nr;
2125
2126 evlist__for_each_entry(evlist, evsel) {
2127 filter = evsel->filter;
2128 max_nr = perf_evsel__nr_addr_filter(evsel);
2129 if (!filter || !max_nr)
2130 continue;
2131 evsel->filter = NULL;
2132 err = parse_addr_filter(evsel, filter, max_nr);
2133 free(filter);
2134 if (err)
2135 return err;
2136 pr_debug("Address filter: %s\n", evsel->filter);
2137 }
2138
2139 return 0;
2140}
2141
