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>
34 #include <linux/list.h>
44 #include "thread_map.h"
48 #include <linux/hash.h>
53 #include <subcmd/parse-options.h>
57 #include "intel-bts.h"
59 #include "s390-cpumsf.h"
61 #include "sane_ctype.h"
62 #include "symbol/kallsyms.h"
64 static bool auxtrace__dont_decode(struct perf_session *session)
66 return !session->itrace_synth_opts ||
67 session->itrace_synth_opts->dont_decode;
70 int auxtrace_mmap__mmap(struct auxtrace_mmap *mm,
71 struct auxtrace_mmap_params *mp,
74 struct perf_event_mmap_page *pc = userpg;
76 WARN_ONCE(mm->base, "Uninitialized auxtrace_mmap\n");
91 #if BITS_PER_LONG != 64 && !defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
92 pr_err("Cannot use AUX area tracing mmaps\n");
96 pc->aux_offset = mp->offset;
97 pc->aux_size = mp->len;
99 mm->base = mmap(NULL, mp->len, mp->prot, MAP_SHARED, fd, mp->offset);
100 if (mm->base == MAP_FAILED) {
101 pr_debug2("failed to mmap AUX area\n");
109 void auxtrace_mmap__munmap(struct auxtrace_mmap *mm)
112 munmap(mm->base, mm->len);
117 void auxtrace_mmap_params__init(struct auxtrace_mmap_params *mp,
118 off_t auxtrace_offset,
119 unsigned int auxtrace_pages,
120 bool auxtrace_overwrite)
122 if (auxtrace_pages) {
123 mp->offset = auxtrace_offset;
124 mp->len = auxtrace_pages * (size_t)page_size;
125 mp->mask = is_power_of_2(mp->len) ? mp->len - 1 : 0;
126 mp->prot = PROT_READ | (auxtrace_overwrite ? 0 : PROT_WRITE);
127 pr_debug2("AUX area mmap length %zu\n", mp->len);
133 void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp,
134 struct perf_evlist *evlist, int idx,
140 mp->cpu = evlist->cpus->map[idx];
142 mp->tid = thread_map__pid(evlist->threads, 0);
147 mp->tid = thread_map__pid(evlist->threads, idx);
151 #define AUXTRACE_INIT_NR_QUEUES 32
153 static struct auxtrace_queue *auxtrace_alloc_queue_array(unsigned int nr_queues)
155 struct auxtrace_queue *queue_array;
156 unsigned int max_nr_queues, i;
158 max_nr_queues = UINT_MAX / sizeof(struct auxtrace_queue);
159 if (nr_queues > max_nr_queues)
162 queue_array = calloc(nr_queues, sizeof(struct auxtrace_queue));
166 for (i = 0; i < nr_queues; i++) {
167 INIT_LIST_HEAD(&queue_array[i].head);
168 queue_array[i].priv = NULL;
174 int auxtrace_queues__init(struct auxtrace_queues *queues)
176 queues->nr_queues = AUXTRACE_INIT_NR_QUEUES;
177 queues->queue_array = auxtrace_alloc_queue_array(queues->nr_queues);
178 if (!queues->queue_array)
183 static int auxtrace_queues__grow(struct auxtrace_queues *queues,
184 unsigned int new_nr_queues)
186 unsigned int nr_queues = queues->nr_queues;
187 struct auxtrace_queue *queue_array;
191 nr_queues = AUXTRACE_INIT_NR_QUEUES;
193 while (nr_queues && nr_queues < new_nr_queues)
196 if (nr_queues < queues->nr_queues || nr_queues < new_nr_queues)
199 queue_array = auxtrace_alloc_queue_array(nr_queues);
203 for (i = 0; i < queues->nr_queues; i++) {
204 list_splice_tail(&queues->queue_array[i].head,
205 &queue_array[i].head);
206 queue_array[i].tid = queues->queue_array[i].tid;
207 queue_array[i].cpu = queues->queue_array[i].cpu;
208 queue_array[i].set = queues->queue_array[i].set;
209 queue_array[i].priv = queues->queue_array[i].priv;
212 queues->nr_queues = nr_queues;
213 queues->queue_array = queue_array;
218 static void *auxtrace_copy_data(u64 size, struct perf_session *session)
220 int fd = perf_data__fd(session->data);
224 if (size > SSIZE_MAX)
231 ret = readn(fd, p, size);
232 if (ret != (ssize_t)size) {
240 static int auxtrace_queues__queue_buffer(struct auxtrace_queues *queues,
242 struct auxtrace_buffer *buffer)
244 struct auxtrace_queue *queue;
247 if (idx >= queues->nr_queues) {
248 err = auxtrace_queues__grow(queues, idx + 1);
253 queue = &queues->queue_array[idx];
257 queue->tid = buffer->tid;
258 queue->cpu = buffer->cpu;
259 } else if (buffer->cpu != queue->cpu || buffer->tid != queue->tid) {
260 pr_err("auxtrace queue conflict: cpu %d, tid %d vs cpu %d, tid %d\n",
261 queue->cpu, queue->tid, buffer->cpu, buffer->tid);
265 buffer->buffer_nr = queues->next_buffer_nr++;
267 list_add_tail(&buffer->list, &queue->head);
269 queues->new_data = true;
270 queues->populated = true;
275 /* Limit buffers to 32MiB on 32-bit */
276 #define BUFFER_LIMIT_FOR_32_BIT (32 * 1024 * 1024)
278 static int auxtrace_queues__split_buffer(struct auxtrace_queues *queues,
280 struct auxtrace_buffer *buffer)
282 u64 sz = buffer->size;
283 bool consecutive = false;
284 struct auxtrace_buffer *b;
287 while (sz > BUFFER_LIMIT_FOR_32_BIT) {
288 b = memdup(buffer, sizeof(struct auxtrace_buffer));
291 b->size = BUFFER_LIMIT_FOR_32_BIT;
292 b->consecutive = consecutive;
293 err = auxtrace_queues__queue_buffer(queues, idx, b);
295 auxtrace_buffer__free(b);
298 buffer->data_offset += BUFFER_LIMIT_FOR_32_BIT;
299 sz -= BUFFER_LIMIT_FOR_32_BIT;
304 buffer->consecutive = consecutive;
309 static bool filter_cpu(struct perf_session *session, int cpu)
311 unsigned long *cpu_bitmap = session->itrace_synth_opts->cpu_bitmap;
313 return cpu_bitmap && cpu != -1 && !test_bit(cpu, cpu_bitmap);
316 static int auxtrace_queues__add_buffer(struct auxtrace_queues *queues,
317 struct perf_session *session,
319 struct auxtrace_buffer *buffer,
320 struct auxtrace_buffer **buffer_ptr)
324 if (filter_cpu(session, buffer->cpu))
327 buffer = memdup(buffer, sizeof(*buffer));
331 if (session->one_mmap) {
332 buffer->data = buffer->data_offset - session->one_mmap_offset +
333 session->one_mmap_addr;
334 } else if (perf_data__is_pipe(session->data)) {
335 buffer->data = auxtrace_copy_data(buffer->size, session);
338 buffer->data_needs_freeing = true;
339 } else if (BITS_PER_LONG == 32 &&
340 buffer->size > BUFFER_LIMIT_FOR_32_BIT) {
341 err = auxtrace_queues__split_buffer(queues, idx, buffer);
346 err = auxtrace_queues__queue_buffer(queues, idx, buffer);
350 /* FIXME: Doesn't work for split buffer */
352 *buffer_ptr = buffer;
357 auxtrace_buffer__free(buffer);
361 int auxtrace_queues__add_event(struct auxtrace_queues *queues,
362 struct perf_session *session,
363 union perf_event *event, off_t data_offset,
364 struct auxtrace_buffer **buffer_ptr)
366 struct auxtrace_buffer buffer = {
368 .tid = event->auxtrace.tid,
369 .cpu = event->auxtrace.cpu,
370 .data_offset = data_offset,
371 .offset = event->auxtrace.offset,
372 .reference = event->auxtrace.reference,
373 .size = event->auxtrace.size,
375 unsigned int idx = event->auxtrace.idx;
377 return auxtrace_queues__add_buffer(queues, session, idx, &buffer,
381 static int auxtrace_queues__add_indexed_event(struct auxtrace_queues *queues,
382 struct perf_session *session,
383 off_t file_offset, size_t sz)
385 union perf_event *event;
387 char buf[PERF_SAMPLE_MAX_SIZE];
389 err = perf_session__peek_event(session, file_offset, buf,
390 PERF_SAMPLE_MAX_SIZE, &event, NULL);
394 if (event->header.type == PERF_RECORD_AUXTRACE) {
395 if (event->header.size < sizeof(struct auxtrace_event) ||
396 event->header.size != sz) {
400 file_offset += event->header.size;
401 err = auxtrace_queues__add_event(queues, session, event,
408 void auxtrace_queues__free(struct auxtrace_queues *queues)
412 for (i = 0; i < queues->nr_queues; i++) {
413 while (!list_empty(&queues->queue_array[i].head)) {
414 struct auxtrace_buffer *buffer;
416 buffer = list_entry(queues->queue_array[i].head.next,
417 struct auxtrace_buffer, list);
418 list_del(&buffer->list);
419 auxtrace_buffer__free(buffer);
423 zfree(&queues->queue_array);
424 queues->nr_queues = 0;
427 static void auxtrace_heapify(struct auxtrace_heap_item *heap_array,
428 unsigned int pos, unsigned int queue_nr,
434 parent = (pos - 1) >> 1;
435 if (heap_array[parent].ordinal <= ordinal)
437 heap_array[pos] = heap_array[parent];
440 heap_array[pos].queue_nr = queue_nr;
441 heap_array[pos].ordinal = ordinal;
444 int auxtrace_heap__add(struct auxtrace_heap *heap, unsigned int queue_nr,
447 struct auxtrace_heap_item *heap_array;
449 if (queue_nr >= heap->heap_sz) {
450 unsigned int heap_sz = AUXTRACE_INIT_NR_QUEUES;
452 while (heap_sz <= queue_nr)
454 heap_array = realloc(heap->heap_array,
455 heap_sz * sizeof(struct auxtrace_heap_item));
458 heap->heap_array = heap_array;
459 heap->heap_sz = heap_sz;
462 auxtrace_heapify(heap->heap_array, heap->heap_cnt++, queue_nr, ordinal);
467 void auxtrace_heap__free(struct auxtrace_heap *heap)
469 zfree(&heap->heap_array);
474 void auxtrace_heap__pop(struct auxtrace_heap *heap)
476 unsigned int pos, last, heap_cnt = heap->heap_cnt;
477 struct auxtrace_heap_item *heap_array;
484 heap_array = heap->heap_array;
488 unsigned int left, right;
490 left = (pos << 1) + 1;
491 if (left >= heap_cnt)
494 if (right >= heap_cnt) {
495 heap_array[pos] = heap_array[left];
498 if (heap_array[left].ordinal < heap_array[right].ordinal) {
499 heap_array[pos] = heap_array[left];
502 heap_array[pos] = heap_array[right];
508 auxtrace_heapify(heap_array, pos, heap_array[last].queue_nr,
509 heap_array[last].ordinal);
512 size_t auxtrace_record__info_priv_size(struct auxtrace_record *itr,
513 struct perf_evlist *evlist)
516 return itr->info_priv_size(itr, evlist);
520 static int auxtrace_not_supported(void)
522 pr_err("AUX area tracing is not supported on this architecture\n");
526 int auxtrace_record__info_fill(struct auxtrace_record *itr,
527 struct perf_session *session,
528 struct auxtrace_info_event *auxtrace_info,
532 return itr->info_fill(itr, session, auxtrace_info, priv_size);
533 return auxtrace_not_supported();
536 void auxtrace_record__free(struct auxtrace_record *itr)
542 int auxtrace_record__snapshot_start(struct auxtrace_record *itr)
544 if (itr && itr->snapshot_start)
545 return itr->snapshot_start(itr);
549 int auxtrace_record__snapshot_finish(struct auxtrace_record *itr)
551 if (itr && itr->snapshot_finish)
552 return itr->snapshot_finish(itr);
556 int auxtrace_record__find_snapshot(struct auxtrace_record *itr, int idx,
557 struct auxtrace_mmap *mm,
558 unsigned char *data, u64 *head, u64 *old)
560 if (itr && itr->find_snapshot)
561 return itr->find_snapshot(itr, idx, mm, data, head, old);
565 int auxtrace_record__options(struct auxtrace_record *itr,
566 struct perf_evlist *evlist,
567 struct record_opts *opts)
570 return itr->recording_options(itr, evlist, opts);
574 u64 auxtrace_record__reference(struct auxtrace_record *itr)
577 return itr->reference(itr);
581 int auxtrace_parse_snapshot_options(struct auxtrace_record *itr,
582 struct record_opts *opts, const char *str)
588 return itr->parse_snapshot_options(itr, opts, str);
590 pr_err("No AUX area tracing to snapshot\n");
594 struct auxtrace_record *__weak
595 auxtrace_record__init(struct perf_evlist *evlist __maybe_unused, int *err)
601 static int auxtrace_index__alloc(struct list_head *head)
603 struct auxtrace_index *auxtrace_index;
605 auxtrace_index = malloc(sizeof(struct auxtrace_index));
609 auxtrace_index->nr = 0;
610 INIT_LIST_HEAD(&auxtrace_index->list);
612 list_add_tail(&auxtrace_index->list, head);
617 void auxtrace_index__free(struct list_head *head)
619 struct auxtrace_index *auxtrace_index, *n;
621 list_for_each_entry_safe(auxtrace_index, n, head, list) {
622 list_del(&auxtrace_index->list);
623 free(auxtrace_index);
627 static struct auxtrace_index *auxtrace_index__last(struct list_head *head)
629 struct auxtrace_index *auxtrace_index;
632 if (list_empty(head)) {
633 err = auxtrace_index__alloc(head);
638 auxtrace_index = list_entry(head->prev, struct auxtrace_index, list);
640 if (auxtrace_index->nr >= PERF_AUXTRACE_INDEX_ENTRY_COUNT) {
641 err = auxtrace_index__alloc(head);
644 auxtrace_index = list_entry(head->prev, struct auxtrace_index,
648 return auxtrace_index;
651 int auxtrace_index__auxtrace_event(struct list_head *head,
652 union perf_event *event, off_t file_offset)
654 struct auxtrace_index *auxtrace_index;
657 auxtrace_index = auxtrace_index__last(head);
661 nr = auxtrace_index->nr;
662 auxtrace_index->entries[nr].file_offset = file_offset;
663 auxtrace_index->entries[nr].sz = event->header.size;
664 auxtrace_index->nr += 1;
669 static int auxtrace_index__do_write(int fd,
670 struct auxtrace_index *auxtrace_index)
672 struct auxtrace_index_entry ent;
675 for (i = 0; i < auxtrace_index->nr; i++) {
676 ent.file_offset = auxtrace_index->entries[i].file_offset;
677 ent.sz = auxtrace_index->entries[i].sz;
678 if (writen(fd, &ent, sizeof(ent)) != sizeof(ent))
684 int auxtrace_index__write(int fd, struct list_head *head)
686 struct auxtrace_index *auxtrace_index;
690 list_for_each_entry(auxtrace_index, head, list)
691 total += auxtrace_index->nr;
693 if (writen(fd, &total, sizeof(total)) != sizeof(total))
696 list_for_each_entry(auxtrace_index, head, list) {
697 err = auxtrace_index__do_write(fd, auxtrace_index);
705 static int auxtrace_index__process_entry(int fd, struct list_head *head,
708 struct auxtrace_index *auxtrace_index;
709 struct auxtrace_index_entry ent;
712 if (readn(fd, &ent, sizeof(ent)) != sizeof(ent))
715 auxtrace_index = auxtrace_index__last(head);
719 nr = auxtrace_index->nr;
721 auxtrace_index->entries[nr].file_offset =
722 bswap_64(ent.file_offset);
723 auxtrace_index->entries[nr].sz = bswap_64(ent.sz);
725 auxtrace_index->entries[nr].file_offset = ent.file_offset;
726 auxtrace_index->entries[nr].sz = ent.sz;
729 auxtrace_index->nr = nr + 1;
734 int auxtrace_index__process(int fd, u64 size, struct perf_session *session,
737 struct list_head *head = &session->auxtrace_index;
740 if (readn(fd, &nr, sizeof(u64)) != sizeof(u64))
746 if (sizeof(u64) + nr * sizeof(struct auxtrace_index_entry) > size)
752 err = auxtrace_index__process_entry(fd, head, needs_swap);
760 static int auxtrace_queues__process_index_entry(struct auxtrace_queues *queues,
761 struct perf_session *session,
762 struct auxtrace_index_entry *ent)
764 return auxtrace_queues__add_indexed_event(queues, session,
765 ent->file_offset, ent->sz);
768 int auxtrace_queues__process_index(struct auxtrace_queues *queues,
769 struct perf_session *session)
771 struct auxtrace_index *auxtrace_index;
772 struct auxtrace_index_entry *ent;
776 if (auxtrace__dont_decode(session))
779 list_for_each_entry(auxtrace_index, &session->auxtrace_index, list) {
780 for (i = 0; i < auxtrace_index->nr; i++) {
781 ent = &auxtrace_index->entries[i];
782 err = auxtrace_queues__process_index_entry(queues,
792 struct auxtrace_buffer *auxtrace_buffer__next(struct auxtrace_queue *queue,
793 struct auxtrace_buffer *buffer)
796 if (list_is_last(&buffer->list, &queue->head))
798 return list_entry(buffer->list.next, struct auxtrace_buffer,
801 if (list_empty(&queue->head))
803 return list_entry(queue->head.next, struct auxtrace_buffer,
808 void *auxtrace_buffer__get_data(struct auxtrace_buffer *buffer, int fd)
810 size_t adj = buffer->data_offset & (page_size - 1);
811 size_t size = buffer->size + adj;
812 off_t file_offset = buffer->data_offset - adj;
818 addr = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, file_offset);
819 if (addr == MAP_FAILED)
822 buffer->mmap_addr = addr;
823 buffer->mmap_size = size;
825 buffer->data = addr + adj;
830 void auxtrace_buffer__put_data(struct auxtrace_buffer *buffer)
832 if (!buffer->data || !buffer->mmap_addr)
834 munmap(buffer->mmap_addr, buffer->mmap_size);
835 buffer->mmap_addr = NULL;
836 buffer->mmap_size = 0;
838 buffer->use_data = NULL;
841 void auxtrace_buffer__drop_data(struct auxtrace_buffer *buffer)
843 auxtrace_buffer__put_data(buffer);
844 if (buffer->data_needs_freeing) {
845 buffer->data_needs_freeing = false;
846 zfree(&buffer->data);
847 buffer->use_data = NULL;
852 void auxtrace_buffer__free(struct auxtrace_buffer *buffer)
854 auxtrace_buffer__drop_data(buffer);
858 void auxtrace_synth_error(struct auxtrace_error_event *auxtrace_error, int type,
859 int code, int cpu, pid_t pid, pid_t tid, u64 ip,
864 memset(auxtrace_error, 0, sizeof(struct auxtrace_error_event));
866 auxtrace_error->header.type = PERF_RECORD_AUXTRACE_ERROR;
867 auxtrace_error->type = type;
868 auxtrace_error->code = code;
869 auxtrace_error->cpu = cpu;
870 auxtrace_error->pid = pid;
871 auxtrace_error->tid = tid;
872 auxtrace_error->ip = ip;
873 strlcpy(auxtrace_error->msg, msg, MAX_AUXTRACE_ERROR_MSG);
875 size = (void *)auxtrace_error->msg - (void *)auxtrace_error +
876 strlen(auxtrace_error->msg) + 1;
877 auxtrace_error->header.size = PERF_ALIGN(size, sizeof(u64));
880 int perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr,
881 struct perf_tool *tool,
882 struct perf_session *session,
883 perf_event__handler_t process)
885 union perf_event *ev;
889 pr_debug2("Synthesizing auxtrace information\n");
890 priv_size = auxtrace_record__info_priv_size(itr, session->evlist);
891 ev = zalloc(sizeof(struct auxtrace_info_event) + priv_size);
895 ev->auxtrace_info.header.type = PERF_RECORD_AUXTRACE_INFO;
896 ev->auxtrace_info.header.size = sizeof(struct auxtrace_info_event) +
898 err = auxtrace_record__info_fill(itr, session, &ev->auxtrace_info,
903 err = process(tool, ev, NULL, NULL);
909 int perf_event__process_auxtrace_info(struct perf_tool *tool __maybe_unused,
910 union perf_event *event,
911 struct perf_session *session)
913 enum auxtrace_type type = event->auxtrace_info.type;
916 fprintf(stdout, " type: %u\n", type);
919 case PERF_AUXTRACE_INTEL_PT:
920 return intel_pt_process_auxtrace_info(event, session);
921 case PERF_AUXTRACE_INTEL_BTS:
922 return intel_bts_process_auxtrace_info(event, session);
923 case PERF_AUXTRACE_ARM_SPE:
924 return arm_spe_process_auxtrace_info(event, session);
925 case PERF_AUXTRACE_CS_ETM:
926 return cs_etm__process_auxtrace_info(event, session);
927 case PERF_AUXTRACE_S390_CPUMSF:
928 return s390_cpumsf_process_auxtrace_info(event, session);
929 case PERF_AUXTRACE_UNKNOWN:
935 s64 perf_event__process_auxtrace(struct perf_tool *tool,
936 union perf_event *event,
937 struct perf_session *session)
942 fprintf(stdout, " size: %#"PRIx64" offset: %#"PRIx64" ref: %#"PRIx64" idx: %u tid: %d cpu: %d\n",
943 event->auxtrace.size, event->auxtrace.offset,
944 event->auxtrace.reference, event->auxtrace.idx,
945 event->auxtrace.tid, event->auxtrace.cpu);
947 if (auxtrace__dont_decode(session))
948 return event->auxtrace.size;
950 if (!session->auxtrace || event->header.type != PERF_RECORD_AUXTRACE)
953 err = session->auxtrace->process_auxtrace_event(session, event, tool);
957 return event->auxtrace.size;
960 #define PERF_ITRACE_DEFAULT_PERIOD_TYPE PERF_ITRACE_PERIOD_NANOSECS
961 #define PERF_ITRACE_DEFAULT_PERIOD 100000
962 #define PERF_ITRACE_DEFAULT_CALLCHAIN_SZ 16
963 #define PERF_ITRACE_MAX_CALLCHAIN_SZ 1024
964 #define PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ 64
965 #define PERF_ITRACE_MAX_LAST_BRANCH_SZ 1024
967 void itrace_synth_opts__set_default(struct itrace_synth_opts *synth_opts)
969 synth_opts->instructions = true;
970 synth_opts->branches = true;
971 synth_opts->transactions = true;
972 synth_opts->ptwrites = true;
973 synth_opts->pwr_events = true;
974 synth_opts->errors = true;
975 synth_opts->period_type = PERF_ITRACE_DEFAULT_PERIOD_TYPE;
976 synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD;
977 synth_opts->callchain_sz = PERF_ITRACE_DEFAULT_CALLCHAIN_SZ;
978 synth_opts->last_branch_sz = PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ;
979 synth_opts->initial_skip = 0;
983 * Please check tools/perf/Documentation/perf-script.txt for information
984 * about the options parsed here, which is introduced after this cset,
985 * when support in 'perf script' for these options is introduced.
987 int itrace_parse_synth_opts(const struct option *opt, const char *str,
990 struct itrace_synth_opts *synth_opts = opt->value;
993 bool period_type_set = false;
994 bool period_set = false;
996 synth_opts->set = true;
999 synth_opts->dont_decode = true;
1004 itrace_synth_opts__set_default(synth_opts);
1008 for (p = str; *p;) {
1011 synth_opts->instructions = true;
1012 while (*p == ' ' || *p == ',')
1015 synth_opts->period = strtoull(p, &endptr, 10);
1018 while (*p == ' ' || *p == ',')
1022 synth_opts->period_type =
1023 PERF_ITRACE_PERIOD_INSTRUCTIONS;
1024 period_type_set = true;
1027 synth_opts->period_type =
1028 PERF_ITRACE_PERIOD_TICKS;
1029 period_type_set = true;
1032 synth_opts->period *= 1000;
1035 synth_opts->period *= 1000;
1040 synth_opts->period_type =
1041 PERF_ITRACE_PERIOD_NANOSECS;
1042 period_type_set = true;
1052 synth_opts->branches = true;
1055 synth_opts->transactions = true;
1058 synth_opts->ptwrites = true;
1061 synth_opts->pwr_events = true;
1064 synth_opts->errors = true;
1067 synth_opts->log = true;
1070 synth_opts->branches = true;
1071 synth_opts->calls = true;
1074 synth_opts->branches = true;
1075 synth_opts->returns = true;
1078 synth_opts->callchain = true;
1079 synth_opts->callchain_sz =
1080 PERF_ITRACE_DEFAULT_CALLCHAIN_SZ;
1081 while (*p == ' ' || *p == ',')
1086 val = strtoul(p, &endptr, 10);
1088 if (!val || val > PERF_ITRACE_MAX_CALLCHAIN_SZ)
1090 synth_opts->callchain_sz = val;
1094 synth_opts->last_branch = true;
1095 synth_opts->last_branch_sz =
1096 PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ;
1097 while (*p == ' ' || *p == ',')
1102 val = strtoul(p, &endptr, 10);
1105 val > PERF_ITRACE_MAX_LAST_BRANCH_SZ)
1107 synth_opts->last_branch_sz = val;
1111 synth_opts->initial_skip = strtoul(p, &endptr, 10);
1124 if (synth_opts->instructions) {
1125 if (!period_type_set)
1126 synth_opts->period_type =
1127 PERF_ITRACE_DEFAULT_PERIOD_TYPE;
1129 synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD;
1135 pr_err("Bad Instruction Tracing options '%s'\n", str);
1139 static const char * const auxtrace_error_type_name[] = {
1140 [PERF_AUXTRACE_ERROR_ITRACE] = "instruction trace",
1143 static const char *auxtrace_error_name(int type)
1145 const char *error_type_name = NULL;
1147 if (type < PERF_AUXTRACE_ERROR_MAX)
1148 error_type_name = auxtrace_error_type_name[type];
1149 if (!error_type_name)
1150 error_type_name = "unknown AUX";
1151 return error_type_name;
1154 size_t perf_event__fprintf_auxtrace_error(union perf_event *event, FILE *fp)
1156 struct auxtrace_error_event *e = &event->auxtrace_error;
1159 ret = fprintf(fp, " %s error type %u",
1160 auxtrace_error_name(e->type), e->type);
1161 ret += fprintf(fp, " cpu %d pid %d tid %d ip %#"PRIx64" code %u: %s\n",
1162 e->cpu, e->pid, e->tid, e->ip, e->code, e->msg);
1166 void perf_session__auxtrace_error_inc(struct perf_session *session,
1167 union perf_event *event)
1169 struct auxtrace_error_event *e = &event->auxtrace_error;
1171 if (e->type < PERF_AUXTRACE_ERROR_MAX)
1172 session->evlist->stats.nr_auxtrace_errors[e->type] += 1;
1175 void events_stats__auxtrace_error_warn(const struct events_stats *stats)
1179 for (i = 0; i < PERF_AUXTRACE_ERROR_MAX; i++) {
1180 if (!stats->nr_auxtrace_errors[i])
1182 ui__warning("%u %s errors\n",
1183 stats->nr_auxtrace_errors[i],
1184 auxtrace_error_name(i));
1188 int perf_event__process_auxtrace_error(struct perf_tool *tool __maybe_unused,
1189 union perf_event *event,
1190 struct perf_session *session)
1192 if (auxtrace__dont_decode(session))
1195 perf_event__fprintf_auxtrace_error(event, stdout);
1199 static int __auxtrace_mmap__read(struct auxtrace_mmap *mm,
1200 struct auxtrace_record *itr,
1201 struct perf_tool *tool, process_auxtrace_t fn,
1202 bool snapshot, size_t snapshot_size)
1204 u64 head, old = mm->prev, offset, ref;
1205 unsigned char *data = mm->base;
1206 size_t size, head_off, old_off, len1, len2, padding;
1207 union perf_event ev;
1208 void *data1, *data2;
1211 head = auxtrace_mmap__read_snapshot_head(mm);
1212 if (auxtrace_record__find_snapshot(itr, mm->idx, mm, data,
1216 head = auxtrace_mmap__read_head(mm);
1222 pr_debug3("auxtrace idx %d old %#"PRIx64" head %#"PRIx64" diff %#"PRIx64"\n",
1223 mm->idx, old, head, head - old);
1226 head_off = head & mm->mask;
1227 old_off = old & mm->mask;
1229 head_off = head % mm->len;
1230 old_off = old % mm->len;
1233 if (head_off > old_off)
1234 size = head_off - old_off;
1236 size = mm->len - (old_off - head_off);
1238 if (snapshot && size > snapshot_size)
1239 size = snapshot_size;
1241 ref = auxtrace_record__reference(itr);
1243 if (head > old || size <= head || mm->mask) {
1244 offset = head - size;
1247 * When the buffer size is not a power of 2, 'head' wraps at the
1248 * highest multiple of the buffer size, so we have to subtract
1249 * the remainder here.
1251 u64 rem = (0ULL - mm->len) % mm->len;
1253 offset = head - size - rem;
1256 if (size > head_off) {
1257 len1 = size - head_off;
1258 data1 = &data[mm->len - len1];
1263 data1 = &data[head_off - len1];
1268 if (itr->alignment) {
1269 unsigned int unwanted = len1 % itr->alignment;
1275 /* padding must be written by fn() e.g. record__process_auxtrace() */
1278 padding = 8 - padding;
1280 memset(&ev, 0, sizeof(ev));
1281 ev.auxtrace.header.type = PERF_RECORD_AUXTRACE;
1282 ev.auxtrace.header.size = sizeof(ev.auxtrace);
1283 ev.auxtrace.size = size + padding;
1284 ev.auxtrace.offset = offset;
1285 ev.auxtrace.reference = ref;
1286 ev.auxtrace.idx = mm->idx;
1287 ev.auxtrace.tid = mm->tid;
1288 ev.auxtrace.cpu = mm->cpu;
1290 if (fn(tool, &ev, data1, len1, data2, len2))
1296 auxtrace_mmap__write_tail(mm, head);
1297 if (itr->read_finish) {
1300 err = itr->read_finish(itr, mm->idx);
1309 int auxtrace_mmap__read(struct auxtrace_mmap *mm, struct auxtrace_record *itr,
1310 struct perf_tool *tool, process_auxtrace_t fn)
1312 return __auxtrace_mmap__read(mm, itr, tool, fn, false, 0);
1315 int auxtrace_mmap__read_snapshot(struct auxtrace_mmap *mm,
1316 struct auxtrace_record *itr,
1317 struct perf_tool *tool, process_auxtrace_t fn,
1318 size_t snapshot_size)
1320 return __auxtrace_mmap__read(mm, itr, tool, fn, true, snapshot_size);
1324 * struct auxtrace_cache - hash table to implement a cache
1325 * @hashtable: the hashtable
1326 * @sz: hashtable size (number of hlists)
1327 * @entry_size: size of an entry
1328 * @limit: limit the number of entries to this maximum, when reached the cache
1329 * is dropped and caching begins again with an empty cache
1330 * @cnt: current number of entries
1331 * @bits: hashtable size (@sz = 2^@bits)
1333 struct auxtrace_cache {
1334 struct hlist_head *hashtable;
1342 struct auxtrace_cache *auxtrace_cache__new(unsigned int bits, size_t entry_size,
1343 unsigned int limit_percent)
1345 struct auxtrace_cache *c;
1346 struct hlist_head *ht;
1349 c = zalloc(sizeof(struct auxtrace_cache));
1355 ht = calloc(sz, sizeof(struct hlist_head));
1359 for (i = 0; i < sz; i++)
1360 INIT_HLIST_HEAD(&ht[i]);
1364 c->entry_size = entry_size;
1365 c->limit = (c->sz * limit_percent) / 100;
1375 static void auxtrace_cache__drop(struct auxtrace_cache *c)
1377 struct auxtrace_cache_entry *entry;
1378 struct hlist_node *tmp;
1384 for (i = 0; i < c->sz; i++) {
1385 hlist_for_each_entry_safe(entry, tmp, &c->hashtable[i], hash) {
1386 hlist_del(&entry->hash);
1387 auxtrace_cache__free_entry(c, entry);
1394 void auxtrace_cache__free(struct auxtrace_cache *c)
1399 auxtrace_cache__drop(c);
1404 void *auxtrace_cache__alloc_entry(struct auxtrace_cache *c)
1406 return malloc(c->entry_size);
1409 void auxtrace_cache__free_entry(struct auxtrace_cache *c __maybe_unused,
1415 int auxtrace_cache__add(struct auxtrace_cache *c, u32 key,
1416 struct auxtrace_cache_entry *entry)
1418 if (c->limit && ++c->cnt > c->limit)
1419 auxtrace_cache__drop(c);
1422 hlist_add_head(&entry->hash, &c->hashtable[hash_32(key, c->bits)]);
1427 void *auxtrace_cache__lookup(struct auxtrace_cache *c, u32 key)
1429 struct auxtrace_cache_entry *entry;
1430 struct hlist_head *hlist;
1435 hlist = &c->hashtable[hash_32(key, c->bits)];
1436 hlist_for_each_entry(entry, hlist, hash) {
1437 if (entry->key == key)
1444 static void addr_filter__free_str(struct addr_filter *filt)
1447 filt->action = NULL;
1448 filt->sym_from = NULL;
1449 filt->sym_to = NULL;
1450 filt->filename = NULL;
1454 static struct addr_filter *addr_filter__new(void)
1456 struct addr_filter *filt = zalloc(sizeof(*filt));
1459 INIT_LIST_HEAD(&filt->list);
1464 static void addr_filter__free(struct addr_filter *filt)
1467 addr_filter__free_str(filt);
1471 static void addr_filters__add(struct addr_filters *filts,
1472 struct addr_filter *filt)
1474 list_add_tail(&filt->list, &filts->head);
1478 static void addr_filters__del(struct addr_filters *filts,
1479 struct addr_filter *filt)
1481 list_del_init(&filt->list);
1485 void addr_filters__init(struct addr_filters *filts)
1487 INIT_LIST_HEAD(&filts->head);
1491 void addr_filters__exit(struct addr_filters *filts)
1493 struct addr_filter *filt, *n;
1495 list_for_each_entry_safe(filt, n, &filts->head, list) {
1496 addr_filters__del(filts, filt);
1497 addr_filter__free(filt);
1501 static int parse_num_or_str(char **inp, u64 *num, const char **str,
1502 const char *str_delim)
1504 *inp += strspn(*inp, " ");
1506 if (isdigit(**inp)) {
1512 *num = strtoull(*inp, &endptr, 0);
1523 *inp += strspn(*inp, " ");
1525 n = strcspn(*inp, str_delim);
1537 static int parse_action(struct addr_filter *filt)
1539 if (!strcmp(filt->action, "filter")) {
1542 } else if (!strcmp(filt->action, "start")) {
1544 } else if (!strcmp(filt->action, "stop")) {
1545 filt->start = false;
1546 } else if (!strcmp(filt->action, "tracestop")) {
1547 filt->start = false;
1549 filt->action += 5; /* Change 'tracestop' to 'stop' */
1556 static int parse_sym_idx(char **inp, int *idx)
1560 *inp += strspn(*inp, " ");
1567 if (**inp == 'g' || **inp == 'G') {
1575 num = strtoul(*inp, &endptr, 0);
1578 if (endptr == *inp || num > INT_MAX)
1587 static int parse_addr_size(char **inp, u64 *num, const char **str, int *idx)
1589 int err = parse_num_or_str(inp, num, str, " ");
1592 err = parse_sym_idx(inp, idx);
1597 static int parse_one_filter(struct addr_filter *filt, const char **filter_inp)
1602 filt->str = fstr = strdup(*filter_inp);
1606 err = parse_num_or_str(&fstr, NULL, &filt->action, " ");
1610 err = parse_action(filt);
1614 err = parse_addr_size(&fstr, &filt->addr, &filt->sym_from,
1615 &filt->sym_from_idx);
1619 fstr += strspn(fstr, " ");
1623 err = parse_addr_size(&fstr, &filt->size, &filt->sym_to,
1630 fstr += strspn(fstr, " ");
1634 err = parse_num_or_str(&fstr, NULL, &filt->filename, " ,");
1639 fstr += strspn(fstr, " ,");
1641 *filter_inp += fstr - filt->str;
1646 addr_filter__free_str(filt);
1651 int addr_filters__parse_bare_filter(struct addr_filters *filts,
1654 struct addr_filter *filt;
1655 const char *fstr = filter;
1659 filt = addr_filter__new();
1660 err = parse_one_filter(filt, &fstr);
1662 addr_filter__free(filt);
1663 addr_filters__exit(filts);
1666 addr_filters__add(filts, filt);
1685 static bool kern_sym_match(struct sym_args *args, const char *name, char type)
1687 /* A function with the same name, and global or the n'th found or any */
1688 return kallsyms__is_function(type) &&
1689 !strcmp(name, args->name) &&
1690 ((args->global && isupper(type)) ||
1691 (args->selected && ++(args->cnt) == args->idx) ||
1692 (!args->global && !args->selected));
1695 static int find_kern_sym_cb(void *arg, const char *name, char type, u64 start)
1697 struct sym_args *args = arg;
1699 if (args->started) {
1701 args->size = start - args->start;
1702 if (args->selected) {
1705 } else if (kern_sym_match(args, name, type)) {
1706 args->duplicate = true;
1709 } else if (kern_sym_match(args, name, type)) {
1710 args->started = true;
1711 args->start = start;
1717 static int print_kern_sym_cb(void *arg, const char *name, char type, u64 start)
1719 struct sym_args *args = arg;
1721 if (kern_sym_match(args, name, type)) {
1722 pr_err("#%d\t0x%"PRIx64"\t%c\t%s\n",
1723 ++args->cnt, start, type, name);
1725 } else if (args->near) {
1727 pr_err("\t\twhich is near\t\t%s\n", name);
1733 static int sym_not_found_error(const char *sym_name, int idx)
1736 pr_err("N'th occurrence (N=%d) of symbol '%s' not found.\n",
1739 pr_err("Global symbol '%s' not found.\n", sym_name);
1741 pr_err("Symbol '%s' not found.\n", sym_name);
1743 pr_err("Note that symbols must be functions.\n");
1748 static int find_kern_sym(const char *sym_name, u64 *start, u64 *size, int idx)
1750 struct sym_args args = {
1754 .selected = idx > 0,
1761 err = kallsyms__parse("/proc/kallsyms", &args, find_kern_sym_cb);
1763 pr_err("Failed to parse /proc/kallsyms\n");
1767 if (args.duplicate) {
1768 pr_err("Multiple kernel symbols with name '%s'\n", sym_name);
1770 kallsyms__parse("/proc/kallsyms", &args, print_kern_sym_cb);
1771 pr_err("Disambiguate symbol name by inserting #n after the name e.g. %s #2\n",
1773 pr_err("Or select a global symbol by inserting #0 or #g or #G\n");
1777 if (!args.started) {
1778 pr_err("Kernel symbol lookup: ");
1779 return sym_not_found_error(sym_name, idx);
1782 *start = args.start;
1788 static int find_entire_kern_cb(void *arg, const char *name __maybe_unused,
1789 char type, u64 start)
1791 struct sym_args *args = arg;
1793 if (!kallsyms__is_function(type))
1796 if (!args->started) {
1797 args->started = true;
1798 args->start = start;
1800 /* Don't know exactly where the kernel ends, so we add a page */
1801 args->size = round_up(start, page_size) + page_size - args->start;
1806 static int addr_filter__entire_kernel(struct addr_filter *filt)
1808 struct sym_args args = { .started = false };
1811 err = kallsyms__parse("/proc/kallsyms", &args, find_entire_kern_cb);
1812 if (err < 0 || !args.started) {
1813 pr_err("Failed to parse /proc/kallsyms\n");
1817 filt->addr = args.start;
1818 filt->size = args.size;
1823 static int check_end_after_start(struct addr_filter *filt, u64 start, u64 size)
1825 if (start + size >= filt->addr)
1828 if (filt->sym_from) {
1829 pr_err("Symbol '%s' (0x%"PRIx64") comes before '%s' (0x%"PRIx64")\n",
1830 filt->sym_to, start, filt->sym_from, filt->addr);
1832 pr_err("Symbol '%s' (0x%"PRIx64") comes before address 0x%"PRIx64")\n",
1833 filt->sym_to, start, filt->addr);
1839 static int addr_filter__resolve_kernel_syms(struct addr_filter *filt)
1841 bool no_size = false;
1845 if (symbol_conf.kptr_restrict) {
1846 pr_err("Kernel addresses are restricted. Unable to resolve kernel symbols.\n");
1850 if (filt->sym_from && !strcmp(filt->sym_from, "*"))
1851 return addr_filter__entire_kernel(filt);
1853 if (filt->sym_from) {
1854 err = find_kern_sym(filt->sym_from, &start, &size,
1855 filt->sym_from_idx);
1859 if (filt->range && !filt->size && !filt->sym_to) {
1866 err = find_kern_sym(filt->sym_to, &start, &size,
1871 err = check_end_after_start(filt, start, size);
1874 filt->size = start + size - filt->addr;
1878 /* The very last symbol in kallsyms does not imply a particular size */
1880 pr_err("Cannot determine size of symbol '%s'\n",
1881 filt->sym_to ? filt->sym_to : filt->sym_from);
1888 static struct dso *load_dso(const char *name)
1893 map = dso__new_map(name);
1899 dso = dso__get(map->dso);
1906 static bool dso_sym_match(struct symbol *sym, const char *name, int *cnt,
1909 /* Same name, and global or the n'th found or any */
1910 return !arch__compare_symbol_names(name, sym->name) &&
1911 ((!idx && sym->binding == STB_GLOBAL) ||
1912 (idx > 0 && ++*cnt == idx) ||
1916 static void print_duplicate_syms(struct dso *dso, const char *sym_name)
1922 pr_err("Multiple symbols with name '%s'\n", sym_name);
1924 sym = dso__first_symbol(dso);
1926 if (dso_sym_match(sym, sym_name, &cnt, -1)) {
1927 pr_err("#%d\t0x%"PRIx64"\t%c\t%s\n",
1929 sym->binding == STB_GLOBAL ? 'g' :
1930 sym->binding == STB_LOCAL ? 'l' : 'w',
1935 pr_err("\t\twhich is near\t\t%s\n", sym->name);
1937 sym = dso__next_symbol(sym);
1940 pr_err("Disambiguate symbol name by inserting #n after the name e.g. %s #2\n",
1942 pr_err("Or select a global symbol by inserting #0 or #g or #G\n");
1945 static int find_dso_sym(struct dso *dso, const char *sym_name, u64 *start,
1954 sym = dso__first_symbol(dso);
1958 *size = sym->start - *start;
1962 } else if (dso_sym_match(sym, sym_name, &cnt, idx)) {
1963 print_duplicate_syms(dso, sym_name);
1966 } else if (dso_sym_match(sym, sym_name, &cnt, idx)) {
1967 *start = sym->start;
1968 *size = sym->end - sym->start;
1970 sym = dso__next_symbol(sym);
1974 return sym_not_found_error(sym_name, idx);
1979 static int addr_filter__entire_dso(struct addr_filter *filt, struct dso *dso)
1981 struct symbol *first_sym = dso__first_symbol(dso);
1982 struct symbol *last_sym = dso__last_symbol(dso);
1984 if (!first_sym || !last_sym) {
1985 pr_err("Failed to determine filter for %s\nNo symbols found.\n",
1990 filt->addr = first_sym->start;
1991 filt->size = last_sym->end - first_sym->start;
1996 static int addr_filter__resolve_syms(struct addr_filter *filt)
2002 if (!filt->sym_from && !filt->sym_to)
2005 if (!filt->filename)
2006 return addr_filter__resolve_kernel_syms(filt);
2008 dso = load_dso(filt->filename);
2010 pr_err("Failed to load symbols from: %s\n", filt->filename);
2014 if (filt->sym_from && !strcmp(filt->sym_from, "*")) {
2015 err = addr_filter__entire_dso(filt, dso);
2019 if (filt->sym_from) {
2020 err = find_dso_sym(dso, filt->sym_from, &start, &size,
2021 filt->sym_from_idx);
2025 if (filt->range && !filt->size && !filt->sym_to)
2030 err = find_dso_sym(dso, filt->sym_to, &start, &size,
2035 err = check_end_after_start(filt, start, size);
2039 filt->size = start + size - filt->addr;
2048 static char *addr_filter__to_str(struct addr_filter *filt)
2050 char filename_buf[PATH_MAX];
2051 const char *at = "";
2052 const char *fn = "";
2056 if (filt->filename) {
2058 fn = realpath(filt->filename, filename_buf);
2064 err = asprintf(&filter, "%s 0x%"PRIx64"/0x%"PRIx64"%s%s",
2065 filt->action, filt->addr, filt->size, at, fn);
2067 err = asprintf(&filter, "%s 0x%"PRIx64"%s%s",
2068 filt->action, filt->addr, at, fn);
2071 return err < 0 ? NULL : filter;
2074 static int parse_addr_filter(struct perf_evsel *evsel, const char *filter,
2077 struct addr_filters filts;
2078 struct addr_filter *filt;
2081 addr_filters__init(&filts);
2083 err = addr_filters__parse_bare_filter(&filts, filter);
2087 if (filts.cnt > max_nr) {
2088 pr_err("Error: number of address filters (%d) exceeds maximum (%d)\n",
2094 list_for_each_entry(filt, &filts.head, list) {
2097 err = addr_filter__resolve_syms(filt);
2101 new_filter = addr_filter__to_str(filt);
2107 if (perf_evsel__append_addr_filter(evsel, new_filter)) {
2114 addr_filters__exit(&filts);
2117 pr_err("Failed to parse address filter: '%s'\n", filter);
2118 pr_err("Filter format is: filter|start|stop|tracestop <start symbol or address> [/ <end symbol or size>] [@<file name>]\n");
2119 pr_err("Where multiple filters are separated by space or comma.\n");
2125 static struct perf_pmu *perf_evsel__find_pmu(struct perf_evsel *evsel)
2127 struct perf_pmu *pmu = NULL;
2129 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
2130 if (pmu->type == evsel->attr.type)
2137 static int perf_evsel__nr_addr_filter(struct perf_evsel *evsel)
2139 struct perf_pmu *pmu = perf_evsel__find_pmu(evsel);
2140 int nr_addr_filters = 0;
2145 perf_pmu__scan_file(pmu, "nr_addr_filters", "%d", &nr_addr_filters);
2147 return nr_addr_filters;
2150 int auxtrace_parse_filters(struct perf_evlist *evlist)
2152 struct perf_evsel *evsel;
2156 evlist__for_each_entry(evlist, evsel) {
2157 filter = evsel->filter;
2158 max_nr = perf_evsel__nr_addr_filter(evsel);
2159 if (!filter || !max_nr)
2161 evsel->filter = NULL;
2162 err = parse_addr_filter(evsel, filter, max_nr);
2166 pr_debug("Address filter: %s\n", evsel->filter);