2 * auxtrace.c: AUX area trace support
3 * Copyright (c) 2013-2015, Intel Corporation.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
17 #include <sys/types.h>
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>
31 #include <sys/param.h>
37 #include <linux/list.h>
47 #include "thread_map.h"
51 #include <linux/hash.h>
56 #include <subcmd/parse-options.h>
59 #include "intel-bts.h"
61 #include "sane_ctype.h"
62 #include "symbol/kallsyms.h"
64 int auxtrace_mmap__mmap(struct auxtrace_mmap *mm,
65 struct auxtrace_mmap_params *mp,
68 struct perf_event_mmap_page *pc = userpg;
70 WARN_ONCE(mm->base, "Uninitialized auxtrace_mmap\n");
85 #if BITS_PER_LONG != 64 && !defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
86 pr_err("Cannot use AUX area tracing mmaps\n");
90 pc->aux_offset = mp->offset;
91 pc->aux_size = mp->len;
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");
103 void auxtrace_mmap__munmap(struct auxtrace_mmap *mm)
106 munmap(mm->base, mm->len);
111 void auxtrace_mmap_params__init(struct auxtrace_mmap_params *mp,
112 off_t auxtrace_offset,
113 unsigned int auxtrace_pages,
114 bool auxtrace_overwrite)
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);
127 void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp,
128 struct perf_evlist *evlist, int idx,
134 mp->cpu = evlist->cpus->map[idx];
136 mp->tid = thread_map__pid(evlist->threads, 0);
141 mp->tid = thread_map__pid(evlist->threads, idx);
145 #define AUXTRACE_INIT_NR_QUEUES 32
147 static struct auxtrace_queue *auxtrace_alloc_queue_array(unsigned int nr_queues)
149 struct auxtrace_queue *queue_array;
150 unsigned int max_nr_queues, i;
152 max_nr_queues = UINT_MAX / sizeof(struct auxtrace_queue);
153 if (nr_queues > max_nr_queues)
156 queue_array = calloc(nr_queues, sizeof(struct auxtrace_queue));
160 for (i = 0; i < nr_queues; i++) {
161 INIT_LIST_HEAD(&queue_array[i].head);
162 queue_array[i].priv = NULL;
168 int auxtrace_queues__init(struct auxtrace_queues *queues)
170 queues->nr_queues = AUXTRACE_INIT_NR_QUEUES;
171 queues->queue_array = auxtrace_alloc_queue_array(queues->nr_queues);
172 if (!queues->queue_array)
177 static int auxtrace_queues__grow(struct auxtrace_queues *queues,
178 unsigned int new_nr_queues)
180 unsigned int nr_queues = queues->nr_queues;
181 struct auxtrace_queue *queue_array;
185 nr_queues = AUXTRACE_INIT_NR_QUEUES;
187 while (nr_queues && nr_queues < new_nr_queues)
190 if (nr_queues < queues->nr_queues || nr_queues < new_nr_queues)
193 queue_array = auxtrace_alloc_queue_array(nr_queues);
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;
203 queues->nr_queues = nr_queues;
204 queues->queue_array = queue_array;
209 static void *auxtrace_copy_data(u64 size, struct perf_session *session)
211 int fd = perf_data__fd(session->data);
215 if (size > SSIZE_MAX)
222 ret = readn(fd, p, size);
223 if (ret != (ssize_t)size) {
231 static int auxtrace_queues__add_buffer(struct auxtrace_queues *queues,
233 struct auxtrace_buffer *buffer)
235 struct auxtrace_queue *queue;
238 if (idx >= queues->nr_queues) {
239 err = auxtrace_queues__grow(queues, idx + 1);
244 queue = &queues->queue_array[idx];
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);
256 buffer->buffer_nr = queues->next_buffer_nr++;
258 list_add_tail(&buffer->list, &queue->head);
260 queues->new_data = true;
261 queues->populated = true;
266 /* Limit buffers to 32MiB on 32-bit */
267 #define BUFFER_LIMIT_FOR_32_BIT (32 * 1024 * 1024)
269 static int auxtrace_queues__split_buffer(struct auxtrace_queues *queues,
271 struct auxtrace_buffer *buffer)
273 u64 sz = buffer->size;
274 bool consecutive = false;
275 struct auxtrace_buffer *b;
278 while (sz > BUFFER_LIMIT_FOR_32_BIT) {
279 b = memdup(buffer, sizeof(struct auxtrace_buffer));
282 b->size = BUFFER_LIMIT_FOR_32_BIT;
283 b->consecutive = consecutive;
284 err = auxtrace_queues__add_buffer(queues, idx, b);
286 auxtrace_buffer__free(b);
289 buffer->data_offset += BUFFER_LIMIT_FOR_32_BIT;
290 sz -= BUFFER_LIMIT_FOR_32_BIT;
295 buffer->consecutive = consecutive;
300 static int auxtrace_queues__add_event_buffer(struct auxtrace_queues *queues,
301 struct perf_session *session,
303 struct auxtrace_buffer *buffer)
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__is_pipe(session->data)) {
309 buffer->data = auxtrace_copy_data(buffer->size, session);
312 buffer->data_needs_freeing = true;
313 } else if (BITS_PER_LONG == 32 &&
314 buffer->size > BUFFER_LIMIT_FOR_32_BIT) {
317 err = auxtrace_queues__split_buffer(queues, idx, buffer);
322 return auxtrace_queues__add_buffer(queues, idx, buffer);
325 static bool filter_cpu(struct perf_session *session, int cpu)
327 unsigned long *cpu_bitmap = session->itrace_synth_opts->cpu_bitmap;
329 return cpu_bitmap && cpu != -1 && !test_bit(cpu, cpu_bitmap);
332 int auxtrace_queues__add_event(struct auxtrace_queues *queues,
333 struct perf_session *session,
334 union perf_event *event, off_t data_offset,
335 struct auxtrace_buffer **buffer_ptr)
337 struct auxtrace_buffer *buffer;
341 if (filter_cpu(session, event->auxtrace.cpu))
344 buffer = zalloc(sizeof(struct auxtrace_buffer));
349 buffer->tid = event->auxtrace.tid;
350 buffer->cpu = event->auxtrace.cpu;
351 buffer->data_offset = data_offset;
352 buffer->offset = event->auxtrace.offset;
353 buffer->reference = event->auxtrace.reference;
354 buffer->size = event->auxtrace.size;
355 idx = event->auxtrace.idx;
357 err = auxtrace_queues__add_event_buffer(queues, session, idx, buffer);
362 *buffer_ptr = buffer;
367 auxtrace_buffer__free(buffer);
371 static int auxtrace_queues__add_indexed_event(struct auxtrace_queues *queues,
372 struct perf_session *session,
373 off_t file_offset, size_t sz)
375 union perf_event *event;
377 char buf[PERF_SAMPLE_MAX_SIZE];
379 err = perf_session__peek_event(session, file_offset, buf,
380 PERF_SAMPLE_MAX_SIZE, &event, NULL);
384 if (event->header.type == PERF_RECORD_AUXTRACE) {
385 if (event->header.size < sizeof(struct auxtrace_event) ||
386 event->header.size != sz) {
390 file_offset += event->header.size;
391 err = auxtrace_queues__add_event(queues, session, event,
398 void auxtrace_queues__free(struct auxtrace_queues *queues)
402 for (i = 0; i < queues->nr_queues; i++) {
403 while (!list_empty(&queues->queue_array[i].head)) {
404 struct auxtrace_buffer *buffer;
406 buffer = list_entry(queues->queue_array[i].head.next,
407 struct auxtrace_buffer, list);
408 list_del(&buffer->list);
409 auxtrace_buffer__free(buffer);
413 zfree(&queues->queue_array);
414 queues->nr_queues = 0;
417 static void auxtrace_heapify(struct auxtrace_heap_item *heap_array,
418 unsigned int pos, unsigned int queue_nr,
424 parent = (pos - 1) >> 1;
425 if (heap_array[parent].ordinal <= ordinal)
427 heap_array[pos] = heap_array[parent];
430 heap_array[pos].queue_nr = queue_nr;
431 heap_array[pos].ordinal = ordinal;
434 int auxtrace_heap__add(struct auxtrace_heap *heap, unsigned int queue_nr,
437 struct auxtrace_heap_item *heap_array;
439 if (queue_nr >= heap->heap_sz) {
440 unsigned int heap_sz = AUXTRACE_INIT_NR_QUEUES;
442 while (heap_sz <= queue_nr)
444 heap_array = realloc(heap->heap_array,
445 heap_sz * sizeof(struct auxtrace_heap_item));
448 heap->heap_array = heap_array;
449 heap->heap_sz = heap_sz;
452 auxtrace_heapify(heap->heap_array, heap->heap_cnt++, queue_nr, ordinal);
457 void auxtrace_heap__free(struct auxtrace_heap *heap)
459 zfree(&heap->heap_array);
464 void auxtrace_heap__pop(struct auxtrace_heap *heap)
466 unsigned int pos, last, heap_cnt = heap->heap_cnt;
467 struct auxtrace_heap_item *heap_array;
474 heap_array = heap->heap_array;
478 unsigned int left, right;
480 left = (pos << 1) + 1;
481 if (left >= heap_cnt)
484 if (right >= heap_cnt) {
485 heap_array[pos] = heap_array[left];
488 if (heap_array[left].ordinal < heap_array[right].ordinal) {
489 heap_array[pos] = heap_array[left];
492 heap_array[pos] = heap_array[right];
498 auxtrace_heapify(heap_array, pos, heap_array[last].queue_nr,
499 heap_array[last].ordinal);
502 size_t auxtrace_record__info_priv_size(struct auxtrace_record *itr,
503 struct perf_evlist *evlist)
506 return itr->info_priv_size(itr, evlist);
510 static int auxtrace_not_supported(void)
512 pr_err("AUX area tracing is not supported on this architecture\n");
516 int auxtrace_record__info_fill(struct auxtrace_record *itr,
517 struct perf_session *session,
518 struct auxtrace_info_event *auxtrace_info,
522 return itr->info_fill(itr, session, auxtrace_info, priv_size);
523 return auxtrace_not_supported();
526 void auxtrace_record__free(struct auxtrace_record *itr)
532 int auxtrace_record__snapshot_start(struct auxtrace_record *itr)
534 if (itr && itr->snapshot_start)
535 return itr->snapshot_start(itr);
539 int auxtrace_record__snapshot_finish(struct auxtrace_record *itr)
541 if (itr && itr->snapshot_finish)
542 return itr->snapshot_finish(itr);
546 int auxtrace_record__find_snapshot(struct auxtrace_record *itr, int idx,
547 struct auxtrace_mmap *mm,
548 unsigned char *data, u64 *head, u64 *old)
550 if (itr && itr->find_snapshot)
551 return itr->find_snapshot(itr, idx, mm, data, head, old);
555 int auxtrace_record__options(struct auxtrace_record *itr,
556 struct perf_evlist *evlist,
557 struct record_opts *opts)
560 return itr->recording_options(itr, evlist, opts);
564 u64 auxtrace_record__reference(struct auxtrace_record *itr)
567 return itr->reference(itr);
571 int auxtrace_parse_snapshot_options(struct auxtrace_record *itr,
572 struct record_opts *opts, const char *str)
578 return itr->parse_snapshot_options(itr, opts, str);
580 pr_err("No AUX area tracing to snapshot\n");
584 struct auxtrace_record *__weak
585 auxtrace_record__init(struct perf_evlist *evlist __maybe_unused, int *err)
591 static int auxtrace_index__alloc(struct list_head *head)
593 struct auxtrace_index *auxtrace_index;
595 auxtrace_index = malloc(sizeof(struct auxtrace_index));
599 auxtrace_index->nr = 0;
600 INIT_LIST_HEAD(&auxtrace_index->list);
602 list_add_tail(&auxtrace_index->list, head);
607 void auxtrace_index__free(struct list_head *head)
609 struct auxtrace_index *auxtrace_index, *n;
611 list_for_each_entry_safe(auxtrace_index, n, head, list) {
612 list_del(&auxtrace_index->list);
613 free(auxtrace_index);
617 static struct auxtrace_index *auxtrace_index__last(struct list_head *head)
619 struct auxtrace_index *auxtrace_index;
622 if (list_empty(head)) {
623 err = auxtrace_index__alloc(head);
628 auxtrace_index = list_entry(head->prev, struct auxtrace_index, list);
630 if (auxtrace_index->nr >= PERF_AUXTRACE_INDEX_ENTRY_COUNT) {
631 err = auxtrace_index__alloc(head);
634 auxtrace_index = list_entry(head->prev, struct auxtrace_index,
638 return auxtrace_index;
641 int auxtrace_index__auxtrace_event(struct list_head *head,
642 union perf_event *event, off_t file_offset)
644 struct auxtrace_index *auxtrace_index;
647 auxtrace_index = auxtrace_index__last(head);
651 nr = auxtrace_index->nr;
652 auxtrace_index->entries[nr].file_offset = file_offset;
653 auxtrace_index->entries[nr].sz = event->header.size;
654 auxtrace_index->nr += 1;
659 static int auxtrace_index__do_write(int fd,
660 struct auxtrace_index *auxtrace_index)
662 struct auxtrace_index_entry ent;
665 for (i = 0; i < auxtrace_index->nr; i++) {
666 ent.file_offset = auxtrace_index->entries[i].file_offset;
667 ent.sz = auxtrace_index->entries[i].sz;
668 if (writen(fd, &ent, sizeof(ent)) != sizeof(ent))
674 int auxtrace_index__write(int fd, struct list_head *head)
676 struct auxtrace_index *auxtrace_index;
680 list_for_each_entry(auxtrace_index, head, list)
681 total += auxtrace_index->nr;
683 if (writen(fd, &total, sizeof(total)) != sizeof(total))
686 list_for_each_entry(auxtrace_index, head, list) {
687 err = auxtrace_index__do_write(fd, auxtrace_index);
695 static int auxtrace_index__process_entry(int fd, struct list_head *head,
698 struct auxtrace_index *auxtrace_index;
699 struct auxtrace_index_entry ent;
702 if (readn(fd, &ent, sizeof(ent)) != sizeof(ent))
705 auxtrace_index = auxtrace_index__last(head);
709 nr = auxtrace_index->nr;
711 auxtrace_index->entries[nr].file_offset =
712 bswap_64(ent.file_offset);
713 auxtrace_index->entries[nr].sz = bswap_64(ent.sz);
715 auxtrace_index->entries[nr].file_offset = ent.file_offset;
716 auxtrace_index->entries[nr].sz = ent.sz;
719 auxtrace_index->nr = nr + 1;
724 int auxtrace_index__process(int fd, u64 size, struct perf_session *session,
727 struct list_head *head = &session->auxtrace_index;
730 if (readn(fd, &nr, sizeof(u64)) != sizeof(u64))
736 if (sizeof(u64) + nr * sizeof(struct auxtrace_index_entry) > size)
742 err = auxtrace_index__process_entry(fd, head, needs_swap);
750 static int auxtrace_queues__process_index_entry(struct auxtrace_queues *queues,
751 struct perf_session *session,
752 struct auxtrace_index_entry *ent)
754 return auxtrace_queues__add_indexed_event(queues, session,
755 ent->file_offset, ent->sz);
758 int auxtrace_queues__process_index(struct auxtrace_queues *queues,
759 struct perf_session *session)
761 struct auxtrace_index *auxtrace_index;
762 struct auxtrace_index_entry *ent;
766 list_for_each_entry(auxtrace_index, &session->auxtrace_index, list) {
767 for (i = 0; i < auxtrace_index->nr; i++) {
768 ent = &auxtrace_index->entries[i];
769 err = auxtrace_queues__process_index_entry(queues,
779 struct auxtrace_buffer *auxtrace_buffer__next(struct auxtrace_queue *queue,
780 struct auxtrace_buffer *buffer)
783 if (list_is_last(&buffer->list, &queue->head))
785 return list_entry(buffer->list.next, struct auxtrace_buffer,
788 if (list_empty(&queue->head))
790 return list_entry(queue->head.next, struct auxtrace_buffer,
795 void *auxtrace_buffer__get_data(struct auxtrace_buffer *buffer, int fd)
797 size_t adj = buffer->data_offset & (page_size - 1);
798 size_t size = buffer->size + adj;
799 off_t file_offset = buffer->data_offset - adj;
805 addr = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, file_offset);
806 if (addr == MAP_FAILED)
809 buffer->mmap_addr = addr;
810 buffer->mmap_size = size;
812 buffer->data = addr + adj;
817 void auxtrace_buffer__put_data(struct auxtrace_buffer *buffer)
819 if (!buffer->data || !buffer->mmap_addr)
821 munmap(buffer->mmap_addr, buffer->mmap_size);
822 buffer->mmap_addr = NULL;
823 buffer->mmap_size = 0;
825 buffer->use_data = NULL;
828 void auxtrace_buffer__drop_data(struct auxtrace_buffer *buffer)
830 auxtrace_buffer__put_data(buffer);
831 if (buffer->data_needs_freeing) {
832 buffer->data_needs_freeing = false;
833 zfree(&buffer->data);
834 buffer->use_data = NULL;
839 void auxtrace_buffer__free(struct auxtrace_buffer *buffer)
841 auxtrace_buffer__drop_data(buffer);
845 void auxtrace_synth_error(struct auxtrace_error_event *auxtrace_error, int type,
846 int code, int cpu, pid_t pid, pid_t tid, u64 ip,
851 memset(auxtrace_error, 0, sizeof(struct auxtrace_error_event));
853 auxtrace_error->header.type = PERF_RECORD_AUXTRACE_ERROR;
854 auxtrace_error->type = type;
855 auxtrace_error->code = code;
856 auxtrace_error->cpu = cpu;
857 auxtrace_error->pid = pid;
858 auxtrace_error->tid = tid;
859 auxtrace_error->ip = ip;
860 strlcpy(auxtrace_error->msg, msg, MAX_AUXTRACE_ERROR_MSG);
862 size = (void *)auxtrace_error->msg - (void *)auxtrace_error +
863 strlen(auxtrace_error->msg) + 1;
864 auxtrace_error->header.size = PERF_ALIGN(size, sizeof(u64));
867 int perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr,
868 struct perf_tool *tool,
869 struct perf_session *session,
870 perf_event__handler_t process)
872 union perf_event *ev;
876 pr_debug2("Synthesizing auxtrace information\n");
877 priv_size = auxtrace_record__info_priv_size(itr, session->evlist);
878 ev = zalloc(sizeof(struct auxtrace_info_event) + priv_size);
882 ev->auxtrace_info.header.type = PERF_RECORD_AUXTRACE_INFO;
883 ev->auxtrace_info.header.size = sizeof(struct auxtrace_info_event) +
885 err = auxtrace_record__info_fill(itr, session, &ev->auxtrace_info,
890 err = process(tool, ev, NULL, NULL);
896 static bool auxtrace__dont_decode(struct perf_session *session)
898 return !session->itrace_synth_opts ||
899 session->itrace_synth_opts->dont_decode;
902 int perf_event__process_auxtrace_info(struct perf_tool *tool __maybe_unused,
903 union perf_event *event,
904 struct perf_session *session)
906 enum auxtrace_type type = event->auxtrace_info.type;
909 fprintf(stdout, " type: %u\n", type);
912 case PERF_AUXTRACE_INTEL_PT:
913 return intel_pt_process_auxtrace_info(event, session);
914 case PERF_AUXTRACE_INTEL_BTS:
915 return intel_bts_process_auxtrace_info(event, session);
916 case PERF_AUXTRACE_CS_ETM:
917 case PERF_AUXTRACE_UNKNOWN:
923 s64 perf_event__process_auxtrace(struct perf_tool *tool,
924 union perf_event *event,
925 struct perf_session *session)
930 fprintf(stdout, " size: %#"PRIx64" offset: %#"PRIx64" ref: %#"PRIx64" idx: %u tid: %d cpu: %d\n",
931 event->auxtrace.size, event->auxtrace.offset,
932 event->auxtrace.reference, event->auxtrace.idx,
933 event->auxtrace.tid, event->auxtrace.cpu);
935 if (auxtrace__dont_decode(session))
936 return event->auxtrace.size;
938 if (!session->auxtrace || event->header.type != PERF_RECORD_AUXTRACE)
941 err = session->auxtrace->process_auxtrace_event(session, event, tool);
945 return event->auxtrace.size;
948 #define PERF_ITRACE_DEFAULT_PERIOD_TYPE PERF_ITRACE_PERIOD_NANOSECS
949 #define PERF_ITRACE_DEFAULT_PERIOD 100000
950 #define PERF_ITRACE_DEFAULT_CALLCHAIN_SZ 16
951 #define PERF_ITRACE_MAX_CALLCHAIN_SZ 1024
952 #define PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ 64
953 #define PERF_ITRACE_MAX_LAST_BRANCH_SZ 1024
955 void itrace_synth_opts__set_default(struct itrace_synth_opts *synth_opts)
957 synth_opts->instructions = true;
958 synth_opts->branches = true;
959 synth_opts->transactions = true;
960 synth_opts->ptwrites = true;
961 synth_opts->pwr_events = true;
962 synth_opts->errors = true;
963 synth_opts->period_type = PERF_ITRACE_DEFAULT_PERIOD_TYPE;
964 synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD;
965 synth_opts->callchain_sz = PERF_ITRACE_DEFAULT_CALLCHAIN_SZ;
966 synth_opts->last_branch_sz = PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ;
967 synth_opts->initial_skip = 0;
971 * Please check tools/perf/Documentation/perf-script.txt for information
972 * about the options parsed here, which is introduced after this cset,
973 * when support in 'perf script' for these options is introduced.
975 int itrace_parse_synth_opts(const struct option *opt, const char *str,
978 struct itrace_synth_opts *synth_opts = opt->value;
981 bool period_type_set = false;
982 bool period_set = false;
984 synth_opts->set = true;
987 synth_opts->dont_decode = true;
992 itrace_synth_opts__set_default(synth_opts);
999 synth_opts->instructions = true;
1000 while (*p == ' ' || *p == ',')
1003 synth_opts->period = strtoull(p, &endptr, 10);
1006 while (*p == ' ' || *p == ',')
1010 synth_opts->period_type =
1011 PERF_ITRACE_PERIOD_INSTRUCTIONS;
1012 period_type_set = true;
1015 synth_opts->period_type =
1016 PERF_ITRACE_PERIOD_TICKS;
1017 period_type_set = true;
1020 synth_opts->period *= 1000;
1023 synth_opts->period *= 1000;
1028 synth_opts->period_type =
1029 PERF_ITRACE_PERIOD_NANOSECS;
1030 period_type_set = true;
1040 synth_opts->branches = true;
1043 synth_opts->transactions = true;
1046 synth_opts->ptwrites = true;
1049 synth_opts->pwr_events = true;
1052 synth_opts->errors = true;
1055 synth_opts->log = true;
1058 synth_opts->branches = true;
1059 synth_opts->calls = true;
1062 synth_opts->branches = true;
1063 synth_opts->returns = true;
1066 synth_opts->callchain = true;
1067 synth_opts->callchain_sz =
1068 PERF_ITRACE_DEFAULT_CALLCHAIN_SZ;
1069 while (*p == ' ' || *p == ',')
1074 val = strtoul(p, &endptr, 10);
1076 if (!val || val > PERF_ITRACE_MAX_CALLCHAIN_SZ)
1078 synth_opts->callchain_sz = val;
1082 synth_opts->last_branch = true;
1083 synth_opts->last_branch_sz =
1084 PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ;
1085 while (*p == ' ' || *p == ',')
1090 val = strtoul(p, &endptr, 10);
1093 val > PERF_ITRACE_MAX_LAST_BRANCH_SZ)
1095 synth_opts->last_branch_sz = val;
1099 synth_opts->initial_skip = strtoul(p, &endptr, 10);
1112 if (synth_opts->instructions) {
1113 if (!period_type_set)
1114 synth_opts->period_type =
1115 PERF_ITRACE_DEFAULT_PERIOD_TYPE;
1117 synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD;
1123 pr_err("Bad Instruction Tracing options '%s'\n", str);
1127 static const char * const auxtrace_error_type_name[] = {
1128 [PERF_AUXTRACE_ERROR_ITRACE] = "instruction trace",
1131 static const char *auxtrace_error_name(int type)
1133 const char *error_type_name = NULL;
1135 if (type < PERF_AUXTRACE_ERROR_MAX)
1136 error_type_name = auxtrace_error_type_name[type];
1137 if (!error_type_name)
1138 error_type_name = "unknown AUX";
1139 return error_type_name;
1142 size_t perf_event__fprintf_auxtrace_error(union perf_event *event, FILE *fp)
1144 struct auxtrace_error_event *e = &event->auxtrace_error;
1147 ret = fprintf(fp, " %s error type %u",
1148 auxtrace_error_name(e->type), e->type);
1149 ret += fprintf(fp, " cpu %d pid %d tid %d ip %#"PRIx64" code %u: %s\n",
1150 e->cpu, e->pid, e->tid, e->ip, e->code, e->msg);
1154 void perf_session__auxtrace_error_inc(struct perf_session *session,
1155 union perf_event *event)
1157 struct auxtrace_error_event *e = &event->auxtrace_error;
1159 if (e->type < PERF_AUXTRACE_ERROR_MAX)
1160 session->evlist->stats.nr_auxtrace_errors[e->type] += 1;
1163 void events_stats__auxtrace_error_warn(const struct events_stats *stats)
1167 for (i = 0; i < PERF_AUXTRACE_ERROR_MAX; i++) {
1168 if (!stats->nr_auxtrace_errors[i])
1170 ui__warning("%u %s errors\n",
1171 stats->nr_auxtrace_errors[i],
1172 auxtrace_error_name(i));
1176 int perf_event__process_auxtrace_error(struct perf_tool *tool __maybe_unused,
1177 union perf_event *event,
1178 struct perf_session *session)
1180 if (auxtrace__dont_decode(session))
1183 perf_event__fprintf_auxtrace_error(event, stdout);
1187 static int __auxtrace_mmap__read(struct auxtrace_mmap *mm,
1188 struct auxtrace_record *itr,
1189 struct perf_tool *tool, process_auxtrace_t fn,
1190 bool snapshot, size_t snapshot_size)
1192 u64 head, old = mm->prev, offset, ref;
1193 unsigned char *data = mm->base;
1194 size_t size, head_off, old_off, len1, len2, padding;
1195 union perf_event ev;
1196 void *data1, *data2;
1199 head = auxtrace_mmap__read_snapshot_head(mm);
1200 if (auxtrace_record__find_snapshot(itr, mm->idx, mm, data,
1204 head = auxtrace_mmap__read_head(mm);
1210 pr_debug3("auxtrace idx %d old %#"PRIx64" head %#"PRIx64" diff %#"PRIx64"\n",
1211 mm->idx, old, head, head - old);
1214 head_off = head & mm->mask;
1215 old_off = old & mm->mask;
1217 head_off = head % mm->len;
1218 old_off = old % mm->len;
1221 if (head_off > old_off)
1222 size = head_off - old_off;
1224 size = mm->len - (old_off - head_off);
1226 if (snapshot && size > snapshot_size)
1227 size = snapshot_size;
1229 ref = auxtrace_record__reference(itr);
1231 if (head > old || size <= head || mm->mask) {
1232 offset = head - size;
1235 * When the buffer size is not a power of 2, 'head' wraps at the
1236 * highest multiple of the buffer size, so we have to subtract
1237 * the remainder here.
1239 u64 rem = (0ULL - mm->len) % mm->len;
1241 offset = head - size - rem;
1244 if (size > head_off) {
1245 len1 = size - head_off;
1246 data1 = &data[mm->len - len1];
1251 data1 = &data[head_off - len1];
1256 if (itr->alignment) {
1257 unsigned int unwanted = len1 % itr->alignment;
1263 /* padding must be written by fn() e.g. record__process_auxtrace() */
1266 padding = 8 - padding;
1268 memset(&ev, 0, sizeof(ev));
1269 ev.auxtrace.header.type = PERF_RECORD_AUXTRACE;
1270 ev.auxtrace.header.size = sizeof(ev.auxtrace);
1271 ev.auxtrace.size = size + padding;
1272 ev.auxtrace.offset = offset;
1273 ev.auxtrace.reference = ref;
1274 ev.auxtrace.idx = mm->idx;
1275 ev.auxtrace.tid = mm->tid;
1276 ev.auxtrace.cpu = mm->cpu;
1278 if (fn(tool, &ev, data1, len1, data2, len2))
1284 auxtrace_mmap__write_tail(mm, head);
1285 if (itr->read_finish) {
1288 err = itr->read_finish(itr, mm->idx);
1297 int auxtrace_mmap__read(struct auxtrace_mmap *mm, struct auxtrace_record *itr,
1298 struct perf_tool *tool, process_auxtrace_t fn)
1300 return __auxtrace_mmap__read(mm, itr, tool, fn, false, 0);
1303 int auxtrace_mmap__read_snapshot(struct auxtrace_mmap *mm,
1304 struct auxtrace_record *itr,
1305 struct perf_tool *tool, process_auxtrace_t fn,
1306 size_t snapshot_size)
1308 return __auxtrace_mmap__read(mm, itr, tool, fn, true, snapshot_size);
1312 * struct auxtrace_cache - hash table to implement a cache
1313 * @hashtable: the hashtable
1314 * @sz: hashtable size (number of hlists)
1315 * @entry_size: size of an entry
1316 * @limit: limit the number of entries to this maximum, when reached the cache
1317 * is dropped and caching begins again with an empty cache
1318 * @cnt: current number of entries
1319 * @bits: hashtable size (@sz = 2^@bits)
1321 struct auxtrace_cache {
1322 struct hlist_head *hashtable;
1330 struct auxtrace_cache *auxtrace_cache__new(unsigned int bits, size_t entry_size,
1331 unsigned int limit_percent)
1333 struct auxtrace_cache *c;
1334 struct hlist_head *ht;
1337 c = zalloc(sizeof(struct auxtrace_cache));
1343 ht = calloc(sz, sizeof(struct hlist_head));
1347 for (i = 0; i < sz; i++)
1348 INIT_HLIST_HEAD(&ht[i]);
1352 c->entry_size = entry_size;
1353 c->limit = (c->sz * limit_percent) / 100;
1363 static void auxtrace_cache__drop(struct auxtrace_cache *c)
1365 struct auxtrace_cache_entry *entry;
1366 struct hlist_node *tmp;
1372 for (i = 0; i < c->sz; i++) {
1373 hlist_for_each_entry_safe(entry, tmp, &c->hashtable[i], hash) {
1374 hlist_del(&entry->hash);
1375 auxtrace_cache__free_entry(c, entry);
1382 void auxtrace_cache__free(struct auxtrace_cache *c)
1387 auxtrace_cache__drop(c);
1392 void *auxtrace_cache__alloc_entry(struct auxtrace_cache *c)
1394 return malloc(c->entry_size);
1397 void auxtrace_cache__free_entry(struct auxtrace_cache *c __maybe_unused,
1403 int auxtrace_cache__add(struct auxtrace_cache *c, u32 key,
1404 struct auxtrace_cache_entry *entry)
1406 if (c->limit && ++c->cnt > c->limit)
1407 auxtrace_cache__drop(c);
1410 hlist_add_head(&entry->hash, &c->hashtable[hash_32(key, c->bits)]);
1415 void *auxtrace_cache__lookup(struct auxtrace_cache *c, u32 key)
1417 struct auxtrace_cache_entry *entry;
1418 struct hlist_head *hlist;
1423 hlist = &c->hashtable[hash_32(key, c->bits)];
1424 hlist_for_each_entry(entry, hlist, hash) {
1425 if (entry->key == key)
1432 static void addr_filter__free_str(struct addr_filter *filt)
1435 filt->action = NULL;
1436 filt->sym_from = NULL;
1437 filt->sym_to = NULL;
1438 filt->filename = NULL;
1442 static struct addr_filter *addr_filter__new(void)
1444 struct addr_filter *filt = zalloc(sizeof(*filt));
1447 INIT_LIST_HEAD(&filt->list);
1452 static void addr_filter__free(struct addr_filter *filt)
1455 addr_filter__free_str(filt);
1459 static void addr_filters__add(struct addr_filters *filts,
1460 struct addr_filter *filt)
1462 list_add_tail(&filt->list, &filts->head);
1466 static void addr_filters__del(struct addr_filters *filts,
1467 struct addr_filter *filt)
1469 list_del_init(&filt->list);
1473 void addr_filters__init(struct addr_filters *filts)
1475 INIT_LIST_HEAD(&filts->head);
1479 void addr_filters__exit(struct addr_filters *filts)
1481 struct addr_filter *filt, *n;
1483 list_for_each_entry_safe(filt, n, &filts->head, list) {
1484 addr_filters__del(filts, filt);
1485 addr_filter__free(filt);
1489 static int parse_num_or_str(char **inp, u64 *num, const char **str,
1490 const char *str_delim)
1492 *inp += strspn(*inp, " ");
1494 if (isdigit(**inp)) {
1500 *num = strtoull(*inp, &endptr, 0);
1511 *inp += strspn(*inp, " ");
1513 n = strcspn(*inp, str_delim);
1525 static int parse_action(struct addr_filter *filt)
1527 if (!strcmp(filt->action, "filter")) {
1530 } else if (!strcmp(filt->action, "start")) {
1532 } else if (!strcmp(filt->action, "stop")) {
1533 filt->start = false;
1534 } else if (!strcmp(filt->action, "tracestop")) {
1535 filt->start = false;
1537 filt->action += 5; /* Change 'tracestop' to 'stop' */
1544 static int parse_sym_idx(char **inp, int *idx)
1548 *inp += strspn(*inp, " ");
1555 if (**inp == 'g' || **inp == 'G') {
1563 num = strtoul(*inp, &endptr, 0);
1566 if (endptr == *inp || num > INT_MAX)
1575 static int parse_addr_size(char **inp, u64 *num, const char **str, int *idx)
1577 int err = parse_num_or_str(inp, num, str, " ");
1580 err = parse_sym_idx(inp, idx);
1585 static int parse_one_filter(struct addr_filter *filt, const char **filter_inp)
1590 filt->str = fstr = strdup(*filter_inp);
1594 err = parse_num_or_str(&fstr, NULL, &filt->action, " ");
1598 err = parse_action(filt);
1602 err = parse_addr_size(&fstr, &filt->addr, &filt->sym_from,
1603 &filt->sym_from_idx);
1607 fstr += strspn(fstr, " ");
1611 err = parse_addr_size(&fstr, &filt->size, &filt->sym_to,
1618 fstr += strspn(fstr, " ");
1622 err = parse_num_or_str(&fstr, NULL, &filt->filename, " ,");
1627 fstr += strspn(fstr, " ,");
1629 *filter_inp += fstr - filt->str;
1634 addr_filter__free_str(filt);
1639 int addr_filters__parse_bare_filter(struct addr_filters *filts,
1642 struct addr_filter *filt;
1643 const char *fstr = filter;
1647 filt = addr_filter__new();
1648 err = parse_one_filter(filt, &fstr);
1650 addr_filter__free(filt);
1651 addr_filters__exit(filts);
1654 addr_filters__add(filts, filt);
1673 static bool kern_sym_match(struct sym_args *args, const char *name, char type)
1675 /* A function with the same name, and global or the n'th found or any */
1676 return symbol_type__is_a(type, MAP__FUNCTION) &&
1677 !strcmp(name, args->name) &&
1678 ((args->global && isupper(type)) ||
1679 (args->selected && ++(args->cnt) == args->idx) ||
1680 (!args->global && !args->selected));
1683 static int find_kern_sym_cb(void *arg, const char *name, char type, u64 start)
1685 struct sym_args *args = arg;
1687 if (args->started) {
1689 args->size = start - args->start;
1690 if (args->selected) {
1693 } else if (kern_sym_match(args, name, type)) {
1694 args->duplicate = true;
1697 } else if (kern_sym_match(args, name, type)) {
1698 args->started = true;
1699 args->start = start;
1705 static int print_kern_sym_cb(void *arg, const char *name, char type, u64 start)
1707 struct sym_args *args = arg;
1709 if (kern_sym_match(args, name, type)) {
1710 pr_err("#%d\t0x%"PRIx64"\t%c\t%s\n",
1711 ++args->cnt, start, type, name);
1713 } else if (args->near) {
1715 pr_err("\t\twhich is near\t\t%s\n", name);
1721 static int sym_not_found_error(const char *sym_name, int idx)
1724 pr_err("N'th occurrence (N=%d) of symbol '%s' not found.\n",
1727 pr_err("Global symbol '%s' not found.\n", sym_name);
1729 pr_err("Symbol '%s' not found.\n", sym_name);
1731 pr_err("Note that symbols must be functions.\n");
1736 static int find_kern_sym(const char *sym_name, u64 *start, u64 *size, int idx)
1738 struct sym_args args = {
1742 .selected = idx > 0,
1749 err = kallsyms__parse("/proc/kallsyms", &args, find_kern_sym_cb);
1751 pr_err("Failed to parse /proc/kallsyms\n");
1755 if (args.duplicate) {
1756 pr_err("Multiple kernel symbols with name '%s'\n", sym_name);
1758 kallsyms__parse("/proc/kallsyms", &args, print_kern_sym_cb);
1759 pr_err("Disambiguate symbol name by inserting #n after the name e.g. %s #2\n",
1761 pr_err("Or select a global symbol by inserting #0 or #g or #G\n");
1765 if (!args.started) {
1766 pr_err("Kernel symbol lookup: ");
1767 return sym_not_found_error(sym_name, idx);
1770 *start = args.start;
1776 static int find_entire_kern_cb(void *arg, const char *name __maybe_unused,
1777 char type, u64 start)
1779 struct sym_args *args = arg;
1781 if (!symbol_type__is_a(type, MAP__FUNCTION))
1784 if (!args->started) {
1785 args->started = true;
1786 args->start = start;
1788 /* Don't know exactly where the kernel ends, so we add a page */
1789 args->size = round_up(start, page_size) + page_size - args->start;
1794 static int addr_filter__entire_kernel(struct addr_filter *filt)
1796 struct sym_args args = { .started = false };
1799 err = kallsyms__parse("/proc/kallsyms", &args, find_entire_kern_cb);
1800 if (err < 0 || !args.started) {
1801 pr_err("Failed to parse /proc/kallsyms\n");
1805 filt->addr = args.start;
1806 filt->size = args.size;
1811 static int check_end_after_start(struct addr_filter *filt, u64 start, u64 size)
1813 if (start + size >= filt->addr)
1816 if (filt->sym_from) {
1817 pr_err("Symbol '%s' (0x%"PRIx64") comes before '%s' (0x%"PRIx64")\n",
1818 filt->sym_to, start, filt->sym_from, filt->addr);
1820 pr_err("Symbol '%s' (0x%"PRIx64") comes before address 0x%"PRIx64")\n",
1821 filt->sym_to, start, filt->addr);
1827 static int addr_filter__resolve_kernel_syms(struct addr_filter *filt)
1829 bool no_size = false;
1833 if (symbol_conf.kptr_restrict) {
1834 pr_err("Kernel addresses are restricted. Unable to resolve kernel symbols.\n");
1838 if (filt->sym_from && !strcmp(filt->sym_from, "*"))
1839 return addr_filter__entire_kernel(filt);
1841 if (filt->sym_from) {
1842 err = find_kern_sym(filt->sym_from, &start, &size,
1843 filt->sym_from_idx);
1847 if (filt->range && !filt->size && !filt->sym_to) {
1854 err = find_kern_sym(filt->sym_to, &start, &size,
1859 err = check_end_after_start(filt, start, size);
1862 filt->size = start + size - filt->addr;
1866 /* The very last symbol in kallsyms does not imply a particular size */
1868 pr_err("Cannot determine size of symbol '%s'\n",
1869 filt->sym_to ? filt->sym_to : filt->sym_from);
1876 static struct dso *load_dso(const char *name)
1881 map = dso__new_map(name);
1887 dso = dso__get(map->dso);
1894 static bool dso_sym_match(struct symbol *sym, const char *name, int *cnt,
1897 /* Same name, and global or the n'th found or any */
1898 return !arch__compare_symbol_names(name, sym->name) &&
1899 ((!idx && sym->binding == STB_GLOBAL) ||
1900 (idx > 0 && ++*cnt == idx) ||
1904 static void print_duplicate_syms(struct dso *dso, const char *sym_name)
1910 pr_err("Multiple symbols with name '%s'\n", sym_name);
1912 sym = dso__first_symbol(dso, MAP__FUNCTION);
1914 if (dso_sym_match(sym, sym_name, &cnt, -1)) {
1915 pr_err("#%d\t0x%"PRIx64"\t%c\t%s\n",
1917 sym->binding == STB_GLOBAL ? 'g' :
1918 sym->binding == STB_LOCAL ? 'l' : 'w',
1923 pr_err("\t\twhich is near\t\t%s\n", sym->name);
1925 sym = dso__next_symbol(sym);
1928 pr_err("Disambiguate symbol name by inserting #n after the name e.g. %s #2\n",
1930 pr_err("Or select a global symbol by inserting #0 or #g or #G\n");
1933 static int find_dso_sym(struct dso *dso, const char *sym_name, u64 *start,
1942 sym = dso__first_symbol(dso, MAP__FUNCTION);
1946 *size = sym->start - *start;
1950 } else if (dso_sym_match(sym, sym_name, &cnt, idx)) {
1951 print_duplicate_syms(dso, sym_name);
1954 } else if (dso_sym_match(sym, sym_name, &cnt, idx)) {
1955 *start = sym->start;
1956 *size = sym->end - sym->start;
1958 sym = dso__next_symbol(sym);
1962 return sym_not_found_error(sym_name, idx);
1967 static int addr_filter__entire_dso(struct addr_filter *filt, struct dso *dso)
1969 struct symbol *first_sym = dso__first_symbol(dso, MAP__FUNCTION);
1970 struct symbol *last_sym = dso__last_symbol(dso, MAP__FUNCTION);
1972 if (!first_sym || !last_sym) {
1973 pr_err("Failed to determine filter for %s\nNo symbols found.\n",
1978 filt->addr = first_sym->start;
1979 filt->size = last_sym->end - first_sym->start;
1984 static int addr_filter__resolve_syms(struct addr_filter *filt)
1990 if (!filt->sym_from && !filt->sym_to)
1993 if (!filt->filename)
1994 return addr_filter__resolve_kernel_syms(filt);
1996 dso = load_dso(filt->filename);
1998 pr_err("Failed to load symbols from: %s\n", filt->filename);
2002 if (filt->sym_from && !strcmp(filt->sym_from, "*")) {
2003 err = addr_filter__entire_dso(filt, dso);
2007 if (filt->sym_from) {
2008 err = find_dso_sym(dso, filt->sym_from, &start, &size,
2009 filt->sym_from_idx);
2013 if (filt->range && !filt->size && !filt->sym_to)
2018 err = find_dso_sym(dso, filt->sym_to, &start, &size,
2023 err = check_end_after_start(filt, start, size);
2027 filt->size = start + size - filt->addr;
2036 static char *addr_filter__to_str(struct addr_filter *filt)
2038 char filename_buf[PATH_MAX];
2039 const char *at = "";
2040 const char *fn = "";
2044 if (filt->filename) {
2046 fn = realpath(filt->filename, filename_buf);
2052 err = asprintf(&filter, "%s 0x%"PRIx64"/0x%"PRIx64"%s%s",
2053 filt->action, filt->addr, filt->size, at, fn);
2055 err = asprintf(&filter, "%s 0x%"PRIx64"%s%s",
2056 filt->action, filt->addr, at, fn);
2059 return err < 0 ? NULL : filter;
2062 static int parse_addr_filter(struct perf_evsel *evsel, const char *filter,
2065 struct addr_filters filts;
2066 struct addr_filter *filt;
2069 addr_filters__init(&filts);
2071 err = addr_filters__parse_bare_filter(&filts, filter);
2075 if (filts.cnt > max_nr) {
2076 pr_err("Error: number of address filters (%d) exceeds maximum (%d)\n",
2082 list_for_each_entry(filt, &filts.head, list) {
2085 err = addr_filter__resolve_syms(filt);
2089 new_filter = addr_filter__to_str(filt);
2095 if (perf_evsel__append_addr_filter(evsel, new_filter)) {
2102 addr_filters__exit(&filts);
2105 pr_err("Failed to parse address filter: '%s'\n", filter);
2106 pr_err("Filter format is: filter|start|stop|tracestop <start symbol or address> [/ <end symbol or size>] [@<file name>]\n");
2107 pr_err("Where multiple filters are separated by space or comma.\n");
2113 static struct perf_pmu *perf_evsel__find_pmu(struct perf_evsel *evsel)
2115 struct perf_pmu *pmu = NULL;
2117 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
2118 if (pmu->type == evsel->attr.type)
2125 static int perf_evsel__nr_addr_filter(struct perf_evsel *evsel)
2127 struct perf_pmu *pmu = perf_evsel__find_pmu(evsel);
2128 int nr_addr_filters = 0;
2133 perf_pmu__scan_file(pmu, "nr_addr_filters", "%d", &nr_addr_filters);
2135 return nr_addr_filters;
2138 int auxtrace_parse_filters(struct perf_evlist *evlist)
2140 struct perf_evsel *evsel;
2144 evlist__for_each_entry(evlist, evsel) {
2145 filter = evsel->filter;
2146 max_nr = perf_evsel__nr_addr_filter(evsel);
2147 if (!filter || !max_nr)
2149 evsel->filter = NULL;
2150 err = parse_addr_filter(evsel, filter, max_nr);
2154 pr_debug("Address filter: %s\n", evsel->filter);