| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * auxtrace.c: AUX area trace support |
| * Copyright (c) 2013-2015, Intel Corporation. |
| */ |
| |
| #include <inttypes.h> |
| #include <sys/types.h> |
| #include <sys/mman.h> |
| #include <stdbool.h> |
| #include <string.h> |
| #include <limits.h> |
| #include <errno.h> |
| |
| #include <linux/kernel.h> |
| #include <linux/perf_event.h> |
| #include <linux/types.h> |
| #include <linux/bitops.h> |
| #include <linux/log2.h> |
| #include <linux/string.h> |
| #include <linux/time64.h> |
| |
| #include <sys/param.h> |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <linux/list.h> |
| #include <linux/zalloc.h> |
| |
| #include "evlist.h" |
| #include "dso.h" |
| #include "map.h" |
| #include "pmu.h" |
| #include "evsel.h" |
| #include "evsel_config.h" |
| #include "symbol.h" |
| #include "util/perf_api_probe.h" |
| #include "util/synthetic-events.h" |
| #include "thread_map.h" |
| #include "asm/bug.h" |
| #include "auxtrace.h" |
| |
| #include <linux/hash.h> |
| |
| #include "event.h" |
| #include "record.h" |
| #include "session.h" |
| #include "debug.h" |
| #include <subcmd/parse-options.h> |
| |
| #include "cs-etm.h" |
| #include "intel-pt.h" |
| #include "intel-bts.h" |
| #include "arm-spe.h" |
| #include "s390-cpumsf.h" |
| #include "util/mmap.h" |
| |
| #include <linux/ctype.h> |
| #include "symbol/kallsyms.h" |
| #include <internal/lib.h> |
| |
| /* |
| * Make a group from 'leader' to 'last', requiring that the events were not |
| * already grouped to a different leader. |
| */ |
| static int perf_evlist__regroup(struct evlist *evlist, |
| struct evsel *leader, |
| struct evsel *last) |
| { |
| struct evsel *evsel; |
| bool grp; |
| |
| if (!evsel__is_group_leader(leader)) |
| return -EINVAL; |
| |
| grp = false; |
| evlist__for_each_entry(evlist, evsel) { |
| if (grp) { |
| if (!(evsel->leader == leader || |
| (evsel->leader == evsel && |
| evsel->core.nr_members <= 1))) |
| return -EINVAL; |
| } else if (evsel == leader) { |
| grp = true; |
| } |
| if (evsel == last) |
| break; |
| } |
| |
| grp = false; |
| evlist__for_each_entry(evlist, evsel) { |
| if (grp) { |
| if (evsel->leader != leader) { |
| evsel->leader = leader; |
| if (leader->core.nr_members < 1) |
| leader->core.nr_members = 1; |
| leader->core.nr_members += 1; |
| } |
| } else if (evsel == leader) { |
| grp = true; |
| } |
| if (evsel == last) |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static bool auxtrace__dont_decode(struct perf_session *session) |
| { |
| return !session->itrace_synth_opts || |
| session->itrace_synth_opts->dont_decode; |
| } |
| |
| int auxtrace_mmap__mmap(struct auxtrace_mmap *mm, |
| struct auxtrace_mmap_params *mp, |
| void *userpg, int fd) |
| { |
| struct perf_event_mmap_page *pc = userpg; |
| |
| WARN_ONCE(mm->base, "Uninitialized auxtrace_mmap\n"); |
| |
| mm->userpg = userpg; |
| mm->mask = mp->mask; |
| mm->len = mp->len; |
| mm->prev = 0; |
| mm->idx = mp->idx; |
| mm->tid = mp->tid; |
| mm->cpu = mp->cpu; |
| |
| if (!mp->len) { |
| mm->base = NULL; |
| return 0; |
| } |
| |
| #if BITS_PER_LONG != 64 && !defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT) |
| pr_err("Cannot use AUX area tracing mmaps\n"); |
| return -1; |
| #endif |
| |
| pc->aux_offset = mp->offset; |
| pc->aux_size = mp->len; |
| |
| mm->base = mmap(NULL, mp->len, mp->prot, MAP_SHARED, fd, mp->offset); |
| if (mm->base == MAP_FAILED) { |
| pr_debug2("failed to mmap AUX area\n"); |
| mm->base = NULL; |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| void auxtrace_mmap__munmap(struct auxtrace_mmap *mm) |
| { |
| if (mm->base) { |
| munmap(mm->base, mm->len); |
| mm->base = NULL; |
| } |
| } |
| |
| void auxtrace_mmap_params__init(struct auxtrace_mmap_params *mp, |
| off_t auxtrace_offset, |
| unsigned int auxtrace_pages, |
| bool auxtrace_overwrite) |
| { |
| if (auxtrace_pages) { |
| mp->offset = auxtrace_offset; |
| mp->len = auxtrace_pages * (size_t)page_size; |
| mp->mask = is_power_of_2(mp->len) ? mp->len - 1 : 0; |
| mp->prot = PROT_READ | (auxtrace_overwrite ? 0 : PROT_WRITE); |
| pr_debug2("AUX area mmap length %zu\n", mp->len); |
| } else { |
| mp->len = 0; |
| } |
| } |
| |
| void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp, |
| struct evlist *evlist, int idx, |
| bool per_cpu) |
| { |
| mp->idx = idx; |
| |
| if (per_cpu) { |
| mp->cpu = evlist->core.cpus->map[idx]; |
| if (evlist->core.threads) |
| mp->tid = perf_thread_map__pid(evlist->core.threads, 0); |
| else |
| mp->tid = -1; |
| } else { |
| mp->cpu = -1; |
| mp->tid = perf_thread_map__pid(evlist->core.threads, idx); |
| } |
| } |
| |
| #define AUXTRACE_INIT_NR_QUEUES 32 |
| |
| static struct auxtrace_queue *auxtrace_alloc_queue_array(unsigned int nr_queues) |
| { |
| struct auxtrace_queue *queue_array; |
| unsigned int max_nr_queues, i; |
| |
| max_nr_queues = UINT_MAX / sizeof(struct auxtrace_queue); |
| if (nr_queues > max_nr_queues) |
| return NULL; |
| |
| queue_array = calloc(nr_queues, sizeof(struct auxtrace_queue)); |
| if (!queue_array) |
| return NULL; |
| |
| for (i = 0; i < nr_queues; i++) { |
| INIT_LIST_HEAD(&queue_array[i].head); |
| queue_array[i].priv = NULL; |
| } |
| |
| return queue_array; |
| } |
| |
| int auxtrace_queues__init(struct auxtrace_queues *queues) |
| { |
| queues->nr_queues = AUXTRACE_INIT_NR_QUEUES; |
| queues->queue_array = auxtrace_alloc_queue_array(queues->nr_queues); |
| if (!queues->queue_array) |
| return -ENOMEM; |
| return 0; |
| } |
| |
| static int auxtrace_queues__grow(struct auxtrace_queues *queues, |
| unsigned int new_nr_queues) |
| { |
| unsigned int nr_queues = queues->nr_queues; |
| struct auxtrace_queue *queue_array; |
| unsigned int i; |
| |
| if (!nr_queues) |
| nr_queues = AUXTRACE_INIT_NR_QUEUES; |
| |
| while (nr_queues && nr_queues < new_nr_queues) |
| nr_queues <<= 1; |
| |
| if (nr_queues < queues->nr_queues || nr_queues < new_nr_queues) |
| return -EINVAL; |
| |
| queue_array = auxtrace_alloc_queue_array(nr_queues); |
| if (!queue_array) |
| return -ENOMEM; |
| |
| for (i = 0; i < queues->nr_queues; i++) { |
| list_splice_tail(&queues->queue_array[i].head, |
| &queue_array[i].head); |
| queue_array[i].tid = queues->queue_array[i].tid; |
| queue_array[i].cpu = queues->queue_array[i].cpu; |
| queue_array[i].set = queues->queue_array[i].set; |
| queue_array[i].priv = queues->queue_array[i].priv; |
| } |
| |
| queues->nr_queues = nr_queues; |
| queues->queue_array = queue_array; |
| |
| return 0; |
| } |
| |
| static void *auxtrace_copy_data(u64 size, struct perf_session *session) |
| { |
| int fd = perf_data__fd(session->data); |
| void *p; |
| ssize_t ret; |
| |
| if (size > SSIZE_MAX) |
| return NULL; |
| |
| p = malloc(size); |
| if (!p) |
| return NULL; |
| |
| ret = readn(fd, p, size); |
| if (ret != (ssize_t)size) { |
| free(p); |
| return NULL; |
| } |
| |
| return p; |
| } |
| |
| static int auxtrace_queues__queue_buffer(struct auxtrace_queues *queues, |
| unsigned int idx, |
| struct auxtrace_buffer *buffer) |
| { |
| struct auxtrace_queue *queue; |
| int err; |
| |
| if (idx >= queues->nr_queues) { |
| err = auxtrace_queues__grow(queues, idx + 1); |
| if (err) |
| return err; |
| } |
| |
| queue = &queues->queue_array[idx]; |
| |
| if (!queue->set) { |
| queue->set = true; |
| queue->tid = buffer->tid; |
| queue->cpu = buffer->cpu; |
| } else if (buffer->cpu != queue->cpu || buffer->tid != queue->tid) { |
| pr_err("auxtrace queue conflict: cpu %d, tid %d vs cpu %d, tid %d\n", |
| queue->cpu, queue->tid, buffer->cpu, buffer->tid); |
| return -EINVAL; |
| } |
| |
| buffer->buffer_nr = queues->next_buffer_nr++; |
| |
| list_add_tail(&buffer->list, &queue->head); |
| |
| queues->new_data = true; |
| queues->populated = true; |
| |
| return 0; |
| } |
| |
| /* Limit buffers to 32MiB on 32-bit */ |
| #define BUFFER_LIMIT_FOR_32_BIT (32 * 1024 * 1024) |
| |
| static int auxtrace_queues__split_buffer(struct auxtrace_queues *queues, |
| unsigned int idx, |
| struct auxtrace_buffer *buffer) |
| { |
| u64 sz = buffer->size; |
| bool consecutive = false; |
| struct auxtrace_buffer *b; |
| int err; |
| |
| while (sz > BUFFER_LIMIT_FOR_32_BIT) { |
| b = memdup(buffer, sizeof(struct auxtrace_buffer)); |
| if (!b) |
| return -ENOMEM; |
| b->size = BUFFER_LIMIT_FOR_32_BIT; |
| b->consecutive = consecutive; |
| err = auxtrace_queues__queue_buffer(queues, idx, b); |
| if (err) { |
| auxtrace_buffer__free(b); |
| return err; |
| } |
| buffer->data_offset += BUFFER_LIMIT_FOR_32_BIT; |
| sz -= BUFFER_LIMIT_FOR_32_BIT; |
| consecutive = true; |
| } |
| |
| buffer->size = sz; |
| buffer->consecutive = consecutive; |
| |
| return 0; |
| } |
| |
| static bool filter_cpu(struct perf_session *session, int cpu) |
| { |
| unsigned long *cpu_bitmap = session->itrace_synth_opts->cpu_bitmap; |
| |
| return cpu_bitmap && cpu != -1 && !test_bit(cpu, cpu_bitmap); |
| } |
| |
| static int auxtrace_queues__add_buffer(struct auxtrace_queues *queues, |
| struct perf_session *session, |
| unsigned int idx, |
| struct auxtrace_buffer *buffer, |
| struct auxtrace_buffer **buffer_ptr) |
| { |
| int err = -ENOMEM; |
| |
| if (filter_cpu(session, buffer->cpu)) |
| return 0; |
| |
| buffer = memdup(buffer, sizeof(*buffer)); |
| if (!buffer) |
| return -ENOMEM; |
| |
| if (session->one_mmap) { |
| buffer->data = buffer->data_offset - session->one_mmap_offset + |
| session->one_mmap_addr; |
| } else if (perf_data__is_pipe(session->data)) { |
| buffer->data = auxtrace_copy_data(buffer->size, session); |
| if (!buffer->data) |
| goto out_free; |
| buffer->data_needs_freeing = true; |
| } else if (BITS_PER_LONG == 32 && |
| buffer->size > BUFFER_LIMIT_FOR_32_BIT) { |
| err = auxtrace_queues__split_buffer(queues, idx, buffer); |
| if (err) |
| goto out_free; |
| } |
| |
| err = auxtrace_queues__queue_buffer(queues, idx, buffer); |
| if (err) |
| goto out_free; |
| |
| /* FIXME: Doesn't work for split buffer */ |
| if (buffer_ptr) |
| *buffer_ptr = buffer; |
| |
| return 0; |
| |
| out_free: |
| auxtrace_buffer__free(buffer); |
| return err; |
| } |
| |
| int auxtrace_queues__add_event(struct auxtrace_queues *queues, |
| struct perf_session *session, |
| union perf_event *event, off_t data_offset, |
| struct auxtrace_buffer **buffer_ptr) |
| { |
| struct auxtrace_buffer buffer = { |
| .pid = -1, |
| .tid = event->auxtrace.tid, |
| .cpu = event->auxtrace.cpu, |
| .data_offset = data_offset, |
| .offset = event->auxtrace.offset, |
| .reference = event->auxtrace.reference, |
| .size = event->auxtrace.size, |
| }; |
| unsigned int idx = event->auxtrace.idx; |
| |
| return auxtrace_queues__add_buffer(queues, session, idx, &buffer, |
| buffer_ptr); |
| } |
| |
| static int auxtrace_queues__add_indexed_event(struct auxtrace_queues *queues, |
| struct perf_session *session, |
| off_t file_offset, size_t sz) |
| { |
| union perf_event *event; |
| int err; |
| char buf[PERF_SAMPLE_MAX_SIZE]; |
| |
| err = perf_session__peek_event(session, file_offset, buf, |
| PERF_SAMPLE_MAX_SIZE, &event, NULL); |
| if (err) |
| return err; |
| |
| if (event->header.type == PERF_RECORD_AUXTRACE) { |
| if (event->header.size < sizeof(struct perf_record_auxtrace) || |
| event->header.size != sz) { |
| err = -EINVAL; |
| goto out; |
| } |
| file_offset += event->header.size; |
| err = auxtrace_queues__add_event(queues, session, event, |
| file_offset, NULL); |
| } |
| out: |
| return err; |
| } |
| |
| void auxtrace_queues__free(struct auxtrace_queues *queues) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < queues->nr_queues; i++) { |
| while (!list_empty(&queues->queue_array[i].head)) { |
| struct auxtrace_buffer *buffer; |
| |
| buffer = list_entry(queues->queue_array[i].head.next, |
| struct auxtrace_buffer, list); |
| list_del_init(&buffer->list); |
| auxtrace_buffer__free(buffer); |
| } |
| } |
| |
| zfree(&queues->queue_array); |
| queues->nr_queues = 0; |
| } |
| |
| static void auxtrace_heapify(struct auxtrace_heap_item *heap_array, |
| unsigned int pos, unsigned int queue_nr, |
| u64 ordinal) |
| { |
| unsigned int parent; |
| |
| while (pos) { |
| parent = (pos - 1) >> 1; |
| if (heap_array[parent].ordinal <= ordinal) |
| break; |
| heap_array[pos] = heap_array[parent]; |
| pos = parent; |
| } |
| heap_array[pos].queue_nr = queue_nr; |
| heap_array[pos].ordinal = ordinal; |
| } |
| |
| int auxtrace_heap__add(struct auxtrace_heap *heap, unsigned int queue_nr, |
| u64 ordinal) |
| { |
| struct auxtrace_heap_item *heap_array; |
| |
| if (queue_nr >= heap->heap_sz) { |
| unsigned int heap_sz = AUXTRACE_INIT_NR_QUEUES; |
| |
| while (heap_sz <= queue_nr) |
| heap_sz <<= 1; |
| heap_array = realloc(heap->heap_array, |
| heap_sz * sizeof(struct auxtrace_heap_item)); |
| if (!heap_array) |
| return -ENOMEM; |
| heap->heap_array = heap_array; |
| heap->heap_sz = heap_sz; |
| } |
| |
| auxtrace_heapify(heap->heap_array, heap->heap_cnt++, queue_nr, ordinal); |
| |
| return 0; |
| } |
| |
| void auxtrace_heap__free(struct auxtrace_heap *heap) |
| { |
| zfree(&heap->heap_array); |
| heap->heap_cnt = 0; |
| heap->heap_sz = 0; |
| } |
| |
| void auxtrace_heap__pop(struct auxtrace_heap *heap) |
| { |
| unsigned int pos, last, heap_cnt = heap->heap_cnt; |
| struct auxtrace_heap_item *heap_array; |
| |
| if (!heap_cnt) |
| return; |
| |
| heap->heap_cnt -= 1; |
| |
| heap_array = heap->heap_array; |
| |
| pos = 0; |
| while (1) { |
| unsigned int left, right; |
| |
| left = (pos << 1) + 1; |
| if (left >= heap_cnt) |
| break; |
| right = left + 1; |
| if (right >= heap_cnt) { |
| heap_array[pos] = heap_array[left]; |
| return; |
| } |
| if (heap_array[left].ordinal < heap_array[right].ordinal) { |
| heap_array[pos] = heap_array[left]; |
| pos = left; |
| } else { |
| heap_array[pos] = heap_array[right]; |
| pos = right; |
| } |
| } |
| |
| last = heap_cnt - 1; |
| auxtrace_heapify(heap_array, pos, heap_array[last].queue_nr, |
| heap_array[last].ordinal); |
| } |
| |
| size_t auxtrace_record__info_priv_size(struct auxtrace_record *itr, |
| struct evlist *evlist) |
| { |
| if (itr) |
| return itr->info_priv_size(itr, evlist); |
| return 0; |
| } |
| |
| static int auxtrace_not_supported(void) |
| { |
| pr_err("AUX area tracing is not supported on this architecture\n"); |
| return -EINVAL; |
| } |
| |
| int auxtrace_record__info_fill(struct auxtrace_record *itr, |
| struct perf_session *session, |
| struct perf_record_auxtrace_info *auxtrace_info, |
| size_t priv_size) |
| { |
| if (itr) |
| return itr->info_fill(itr, session, auxtrace_info, priv_size); |
| return auxtrace_not_supported(); |
| } |
| |
| void auxtrace_record__free(struct auxtrace_record *itr) |
| { |
| if (itr) |
| itr->free(itr); |
| } |
| |
| int auxtrace_record__snapshot_start(struct auxtrace_record *itr) |
| { |
| if (itr && itr->snapshot_start) |
| return itr->snapshot_start(itr); |
| return 0; |
| } |
| |
| int auxtrace_record__snapshot_finish(struct auxtrace_record *itr, bool on_exit) |
| { |
| if (!on_exit && itr && itr->snapshot_finish) |
| return itr->snapshot_finish(itr); |
| return 0; |
| } |
| |
| int auxtrace_record__find_snapshot(struct auxtrace_record *itr, int idx, |
| struct auxtrace_mmap *mm, |
| unsigned char *data, u64 *head, u64 *old) |
| { |
| if (itr && itr->find_snapshot) |
| return itr->find_snapshot(itr, idx, mm, data, head, old); |
| return 0; |
| } |
| |
| int auxtrace_record__options(struct auxtrace_record *itr, |
| struct evlist *evlist, |
| struct record_opts *opts) |
| { |
| if (itr) { |
| itr->evlist = evlist; |
| return itr->recording_options(itr, evlist, opts); |
| } |
| return 0; |
| } |
| |
| u64 auxtrace_record__reference(struct auxtrace_record *itr) |
| { |
| if (itr) |
| return itr->reference(itr); |
| return 0; |
| } |
| |
| int auxtrace_parse_snapshot_options(struct auxtrace_record *itr, |
| struct record_opts *opts, const char *str) |
| { |
| if (!str) |
| return 0; |
| |
| /* PMU-agnostic options */ |
| switch (*str) { |
| case 'e': |
| opts->auxtrace_snapshot_on_exit = true; |
| str++; |
| break; |
| default: |
| break; |
| } |
| |
| if (itr) |
| return itr->parse_snapshot_options(itr, opts, str); |
| |
| pr_err("No AUX area tracing to snapshot\n"); |
| return -EINVAL; |
| } |
| |
| int auxtrace_record__read_finish(struct auxtrace_record *itr, int idx) |
| { |
| struct evsel *evsel; |
| |
| if (!itr->evlist || !itr->pmu) |
| return -EINVAL; |
| |
| evlist__for_each_entry(itr->evlist, evsel) { |
| if (evsel->core.attr.type == itr->pmu->type) { |
| if (evsel->disabled) |
| return 0; |
| return perf_evlist__enable_event_idx(itr->evlist, evsel, |
| idx); |
| } |
| } |
| return -EINVAL; |
| } |
| |
| /* |
| * Event record size is 16-bit which results in a maximum size of about 64KiB. |
| * Allow about 4KiB for the rest of the sample record, to give a maximum |
| * AUX area sample size of 60KiB. |
| */ |
| #define MAX_AUX_SAMPLE_SIZE (60 * 1024) |
| |
| /* Arbitrary default size if no other default provided */ |
| #define DEFAULT_AUX_SAMPLE_SIZE (4 * 1024) |
| |
| static int auxtrace_validate_aux_sample_size(struct evlist *evlist, |
| struct record_opts *opts) |
| { |
| struct evsel *evsel; |
| bool has_aux_leader = false; |
| u32 sz; |
| |
| evlist__for_each_entry(evlist, evsel) { |
| sz = evsel->core.attr.aux_sample_size; |
| if (evsel__is_group_leader(evsel)) { |
| has_aux_leader = evsel__is_aux_event(evsel); |
| if (sz) { |
| if (has_aux_leader) |
| pr_err("Cannot add AUX area sampling to an AUX area event\n"); |
| else |
| pr_err("Cannot add AUX area sampling to a group leader\n"); |
| return -EINVAL; |
| } |
| } |
| if (sz > MAX_AUX_SAMPLE_SIZE) { |
| pr_err("AUX area sample size %u too big, max. %d\n", |
| sz, MAX_AUX_SAMPLE_SIZE); |
| return -EINVAL; |
| } |
| if (sz) { |
| if (!has_aux_leader) { |
| pr_err("Cannot add AUX area sampling because group leader is not an AUX area event\n"); |
| return -EINVAL; |
| } |
| evsel__set_sample_bit(evsel, AUX); |
| opts->auxtrace_sample_mode = true; |
| } else { |
| evsel__reset_sample_bit(evsel, AUX); |
| } |
| } |
| |
| if (!opts->auxtrace_sample_mode) { |
| pr_err("AUX area sampling requires an AUX area event group leader plus other events to which to add samples\n"); |
| return -EINVAL; |
| } |
| |
| if (!perf_can_aux_sample()) { |
| pr_err("AUX area sampling is not supported by kernel\n"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| int auxtrace_parse_sample_options(struct auxtrace_record *itr, |
| struct evlist *evlist, |
| struct record_opts *opts, const char *str) |
| { |
| struct evsel_config_term *term; |
| struct evsel *aux_evsel; |
| bool has_aux_sample_size = false; |
| bool has_aux_leader = false; |
| struct evsel *evsel; |
| char *endptr; |
| unsigned long sz; |
| |
| if (!str) |
| goto no_opt; |
| |
| if (!itr) { |
| pr_err("No AUX area event to sample\n"); |
| return -EINVAL; |
| } |
| |
| sz = strtoul(str, &endptr, 0); |
| if (*endptr || sz > UINT_MAX) { |
| pr_err("Bad AUX area sampling option: '%s'\n", str); |
| return -EINVAL; |
| } |
| |
| if (!sz) |
| sz = itr->default_aux_sample_size; |
| |
| if (!sz) |
| sz = DEFAULT_AUX_SAMPLE_SIZE; |
| |
| /* Set aux_sample_size based on --aux-sample option */ |
| evlist__for_each_entry(evlist, evsel) { |
| if (evsel__is_group_leader(evsel)) { |
| has_aux_leader = evsel__is_aux_event(evsel); |
| } else if (has_aux_leader) { |
| evsel->core.attr.aux_sample_size = sz; |
| } |
| } |
| no_opt: |
| aux_evsel = NULL; |
| /* Override with aux_sample_size from config term */ |
| evlist__for_each_entry(evlist, evsel) { |
| if (evsel__is_aux_event(evsel)) |
| aux_evsel = evsel; |
| term = evsel__get_config_term(evsel, AUX_SAMPLE_SIZE); |
| if (term) { |
| has_aux_sample_size = true; |
| evsel->core.attr.aux_sample_size = term->val.aux_sample_size; |
| /* If possible, group with the AUX event */ |
| if (aux_evsel && evsel->core.attr.aux_sample_size) |
| perf_evlist__regroup(evlist, aux_evsel, evsel); |
| } |
| } |
| |
| if (!str && !has_aux_sample_size) |
| return 0; |
| |
| if (!itr) { |
| pr_err("No AUX area event to sample\n"); |
| return -EINVAL; |
| } |
| |
| return auxtrace_validate_aux_sample_size(evlist, opts); |
| } |
| |
| struct auxtrace_record *__weak |
| auxtrace_record__init(struct evlist *evlist __maybe_unused, int *err) |
| { |
| *err = 0; |
| return NULL; |
| } |
| |
| static int auxtrace_index__alloc(struct list_head *head) |
| { |
| struct auxtrace_index *auxtrace_index; |
| |
| auxtrace_index = malloc(sizeof(struct auxtrace_index)); |
| if (!auxtrace_index) |
| return -ENOMEM; |
| |
| auxtrace_index->nr = 0; |
| INIT_LIST_HEAD(&auxtrace_index->list); |
| |
| list_add_tail(&auxtrace_index->list, head); |
| |
| return 0; |
| } |
| |
| void auxtrace_index__free(struct list_head *head) |
| { |
| struct auxtrace_index *auxtrace_index, *n; |
| |
| list_for_each_entry_safe(auxtrace_index, n, head, list) { |
| list_del_init(&auxtrace_index->list); |
| free(auxtrace_index); |
| } |
| } |
| |
| static struct auxtrace_index *auxtrace_index__last(struct list_head *head) |
| { |
| struct auxtrace_index *auxtrace_index; |
| int err; |
| |
| if (list_empty(head)) { |
| err = auxtrace_index__alloc(head); |
| if (err) |
| return NULL; |
| } |
| |
| auxtrace_index = list_entry(head->prev, struct auxtrace_index, list); |
| |
| if (auxtrace_index->nr >= PERF_AUXTRACE_INDEX_ENTRY_COUNT) { |
| err = auxtrace_index__alloc(head); |
| if (err) |
| return NULL; |
| auxtrace_index = list_entry(head->prev, struct auxtrace_index, |
| list); |
| } |
| |
| return auxtrace_index; |
| } |
| |
| int auxtrace_index__auxtrace_event(struct list_head *head, |
| union perf_event *event, off_t file_offset) |
| { |
| struct auxtrace_index *auxtrace_index; |
| size_t nr; |
| |
| auxtrace_index = auxtrace_index__last(head); |
| if (!auxtrace_index) |
| return -ENOMEM; |
| |
| nr = auxtrace_index->nr; |
| auxtrace_index->entries[nr].file_offset = file_offset; |
| auxtrace_index->entries[nr].sz = event->header.size; |
| auxtrace_index->nr += 1; |
| |
| return 0; |
| } |
| |
| static int auxtrace_index__do_write(int fd, |
| struct auxtrace_index *auxtrace_index) |
| { |
| struct auxtrace_index_entry ent; |
| size_t i; |
| |
| for (i = 0; i < auxtrace_index->nr; i++) { |
| ent.file_offset = auxtrace_index->entries[i].file_offset; |
| ent.sz = auxtrace_index->entries[i].sz; |
| if (writen(fd, &ent, sizeof(ent)) != sizeof(ent)) |
| return -errno; |
| } |
| return 0; |
| } |
| |
| int auxtrace_index__write(int fd, struct list_head *head) |
| { |
| struct auxtrace_index *auxtrace_index; |
| u64 total = 0; |
| int err; |
| |
| list_for_each_entry(auxtrace_index, head, list) |
| total += auxtrace_index->nr; |
| |
| if (writen(fd, &total, sizeof(total)) != sizeof(total)) |
| return -errno; |
| |
| list_for_each_entry(auxtrace_index, head, list) { |
| err = auxtrace_index__do_write(fd, auxtrace_index); |
| if (err) |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| static int auxtrace_index__process_entry(int fd, struct list_head *head, |
| bool needs_swap) |
| { |
| struct auxtrace_index *auxtrace_index; |
| struct auxtrace_index_entry ent; |
| size_t nr; |
| |
| if (readn(fd, &ent, sizeof(ent)) != sizeof(ent)) |
| return -1; |
| |
| auxtrace_index = auxtrace_index__last(head); |
| if (!auxtrace_index) |
| return -1; |
| |
| nr = auxtrace_index->nr; |
| if (needs_swap) { |
| auxtrace_index->entries[nr].file_offset = |
| bswap_64(ent.file_offset); |
| auxtrace_index->entries[nr].sz = bswap_64(ent.sz); |
| } else { |
| auxtrace_index->entries[nr].file_offset = ent.file_offset; |
| auxtrace_index->entries[nr].sz = ent.sz; |
| } |
| |
| auxtrace_index->nr = nr + 1; |
| |
| return 0; |
| } |
| |
| int auxtrace_index__process(int fd, u64 size, struct perf_session *session, |
| bool needs_swap) |
| { |
| struct list_head *head = &session->auxtrace_index; |
| u64 nr; |
| |
| if (readn(fd, &nr, sizeof(u64)) != sizeof(u64)) |
| return -1; |
| |
| if (needs_swap) |
| nr = bswap_64(nr); |
| |
| if (sizeof(u64) + nr * sizeof(struct auxtrace_index_entry) > size) |
| return -1; |
| |
| while (nr--) { |
| int err; |
| |
| err = auxtrace_index__process_entry(fd, head, needs_swap); |
| if (err) |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| static int auxtrace_queues__process_index_entry(struct auxtrace_queues *queues, |
| struct perf_session *session, |
| struct auxtrace_index_entry *ent) |
| { |
| return auxtrace_queues__add_indexed_event(queues, session, |
| ent->file_offset, ent->sz); |
| } |
| |
| int auxtrace_queues__process_index(struct auxtrace_queues *queues, |
| struct perf_session *session) |
| { |
| struct auxtrace_index *auxtrace_index; |
| struct auxtrace_index_entry *ent; |
| size_t i; |
| int err; |
| |
| if (auxtrace__dont_decode(session)) |
| return 0; |
| |
| list_for_each_entry(auxtrace_index, &session->auxtrace_index, list) { |
| for (i = 0; i < auxtrace_index->nr; i++) { |
| ent = &auxtrace_index->entries[i]; |
| err = auxtrace_queues__process_index_entry(queues, |
| session, |
| ent); |
| if (err) |
| return err; |
| } |
| } |
| return 0; |
| } |
| |
| struct auxtrace_buffer *auxtrace_buffer__next(struct auxtrace_queue *queue, |
| struct auxtrace_buffer *buffer) |
| { |
| if (buffer) { |
| if (list_is_last(&buffer->list, &queue->head)) |
| return NULL; |
| return list_entry(buffer->list.next, struct auxtrace_buffer, |
| list); |
| } else { |
| if (list_empty(&queue->head)) |
| return NULL; |
| return list_entry(queue->head.next, struct auxtrace_buffer, |
| list); |
| } |
| } |
| |
| struct auxtrace_queue *auxtrace_queues__sample_queue(struct auxtrace_queues *queues, |
| struct perf_sample *sample, |
| struct perf_session *session) |
| { |
| struct perf_sample_id *sid; |
| unsigned int idx; |
| u64 id; |
| |
| id = sample->id; |
| if (!id) |
| return NULL; |
| |
| sid = perf_evlist__id2sid(session->evlist, id); |
| if (!sid) |
| return NULL; |
| |
| idx = sid->idx; |
| |
| if (idx >= queues->nr_queues) |
| return NULL; |
| |
| return &queues->queue_array[idx]; |
| } |
| |
| int auxtrace_queues__add_sample(struct auxtrace_queues *queues, |
| struct perf_session *session, |
| struct perf_sample *sample, u64 data_offset, |
| u64 reference) |
| { |
| struct auxtrace_buffer buffer = { |
| .pid = -1, |
| .data_offset = data_offset, |
| .reference = reference, |
| .size = sample->aux_sample.size, |
| }; |
| struct perf_sample_id *sid; |
| u64 id = sample->id; |
| unsigned int idx; |
| |
| if (!id) |
| return -EINVAL; |
| |
| sid = perf_evlist__id2sid(session->evlist, id); |
| if (!sid) |
| return -ENOENT; |
| |
| idx = sid->idx; |
| buffer.tid = sid->tid; |
| buffer.cpu = sid->cpu; |
| |
| return auxtrace_queues__add_buffer(queues, session, idx, &buffer, NULL); |
| } |
| |
| struct queue_data { |
| bool samples; |
| bool events; |
| }; |
| |
| static int auxtrace_queue_data_cb(struct perf_session *session, |
| union perf_event *event, u64 offset, |
| void *data) |
| { |
| struct queue_data *qd = data; |
| struct perf_sample sample; |
| int err; |
| |
| if (qd->events && event->header.type == PERF_RECORD_AUXTRACE) { |
| if (event->header.size < sizeof(struct perf_record_auxtrace)) |
| return -EINVAL; |
| offset += event->header.size; |
| return session->auxtrace->queue_data(session, NULL, event, |
| offset); |
| } |
| |
| if (!qd->samples || event->header.type != PERF_RECORD_SAMPLE) |
| return 0; |
| |
| err = perf_evlist__parse_sample(session->evlist, event, &sample); |
| if (err) |
| return err; |
| |
| if (!sample.aux_sample.size) |
| return 0; |
| |
| offset += sample.aux_sample.data - (void *)event; |
| |
| return session->auxtrace->queue_data(session, &sample, NULL, offset); |
| } |
| |
| int auxtrace_queue_data(struct perf_session *session, bool samples, bool events) |
| { |
| struct queue_data qd = { |
| .samples = samples, |
| .events = events, |
| }; |
| |
| if (auxtrace__dont_decode(session)) |
| return 0; |
| |
| if (!session->auxtrace || !session->auxtrace->queue_data) |
| return -EINVAL; |
| |
| return perf_session__peek_events(session, session->header.data_offset, |
| session->header.data_size, |
| auxtrace_queue_data_cb, &qd); |
| } |
| |
| void *auxtrace_buffer__get_data(struct auxtrace_buffer *buffer, int fd) |
| { |
| size_t adj = buffer->data_offset & (page_size - 1); |
| size_t size = buffer->size + adj; |
| off_t file_offset = buffer->data_offset - adj; |
| void *addr; |
| |
| if (buffer->data) |
| return buffer->data; |
| |
| addr = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, file_offset); |
| if (addr == MAP_FAILED) |
| return NULL; |
| |
| buffer->mmap_addr = addr; |
| buffer->mmap_size = size; |
| |
| buffer->data = addr + adj; |
| |
| return buffer->data; |
| } |
| |
| void auxtrace_buffer__put_data(struct auxtrace_buffer *buffer) |
| { |
| if (!buffer->data || !buffer->mmap_addr) |
| return; |
| munmap(buffer->mmap_addr, buffer->mmap_size); |
| buffer->mmap_addr = NULL; |
| buffer->mmap_size = 0; |
| buffer->data = NULL; |
| buffer->use_data = NULL; |
| } |
| |
| void auxtrace_buffer__drop_data(struct auxtrace_buffer *buffer) |
| { |
| auxtrace_buffer__put_data(buffer); |
| if (buffer->data_needs_freeing) { |
| buffer->data_needs_freeing = false; |
| zfree(&buffer->data); |
| buffer->use_data = NULL; |
| buffer->size = 0; |
| } |
| } |
| |
| void auxtrace_buffer__free(struct auxtrace_buffer *buffer) |
| { |
| auxtrace_buffer__drop_data(buffer); |
| free(buffer); |
| } |
| |
| void auxtrace_synth_error(struct perf_record_auxtrace_error *auxtrace_error, int type, |
| int code, int cpu, pid_t pid, pid_t tid, u64 ip, |
| const char *msg, u64 timestamp) |
| { |
| size_t size; |
| |
| memset(auxtrace_error, 0, sizeof(struct perf_record_auxtrace_error)); |
| |
| auxtrace_error->header.type = PERF_RECORD_AUXTRACE_ERROR; |
| auxtrace_error->type = type; |
| auxtrace_error->code = code; |
| auxtrace_error->cpu = cpu; |
| auxtrace_error->pid = pid; |
| auxtrace_error->tid = tid; |
| auxtrace_error->fmt = 1; |
| auxtrace_error->ip = ip; |
| auxtrace_error->time = timestamp; |
| strlcpy(auxtrace_error->msg, msg, MAX_AUXTRACE_ERROR_MSG); |
| |
| size = (void *)auxtrace_error->msg - (void *)auxtrace_error + |
| strlen(auxtrace_error->msg) + 1; |
| auxtrace_error->header.size = PERF_ALIGN(size, sizeof(u64)); |
| } |
| |
| int perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr, |
| struct perf_tool *tool, |
| struct perf_session *session, |
| perf_event__handler_t process) |
| { |
| union perf_event *ev; |
| size_t priv_size; |
| int err; |
| |
| pr_debug2("Synthesizing auxtrace information\n"); |
| priv_size = auxtrace_record__info_priv_size(itr, session->evlist); |
| ev = zalloc(sizeof(struct perf_record_auxtrace_info) + priv_size); |
| if (!ev) |
| return -ENOMEM; |
| |
| ev->auxtrace_info.header.type = PERF_RECORD_AUXTRACE_INFO; |
| ev->auxtrace_info.header.size = sizeof(struct perf_record_auxtrace_info) + |
| priv_size; |
| err = auxtrace_record__info_fill(itr, session, &ev->auxtrace_info, |
| priv_size); |
| if (err) |
| goto out_free; |
| |
| err = process(tool, ev, NULL, NULL); |
| out_free: |
| free(ev); |
| return err; |
| } |
| |
| static void unleader_evsel(struct evlist *evlist, struct evsel *leader) |
| { |
| struct evsel *new_leader = NULL; |
| struct evsel *evsel; |
| |
| /* Find new leader for the group */ |
| evlist__for_each_entry(evlist, evsel) { |
| if (evsel->leader != leader || evsel == leader) |
| continue; |
| if (!new_leader) |
| new_leader = evsel; |
| evsel->leader = new_leader; |
| } |
| |
| /* Update group information */ |
| if (new_leader) { |
| zfree(&new_leader->group_name); |
| new_leader->group_name = leader->group_name; |
| leader->group_name = NULL; |
| |
| new_leader->core.nr_members = leader->core.nr_members - 1; |
| leader->core.nr_members = 1; |
| } |
| } |
| |
| static void unleader_auxtrace(struct perf_session *session) |
| { |
| struct evsel *evsel; |
| |
| evlist__for_each_entry(session->evlist, evsel) { |
| if (auxtrace__evsel_is_auxtrace(session, evsel) && |
| evsel__is_group_leader(evsel)) { |
| unleader_evsel(session->evlist, evsel); |
| } |
| } |
| } |
| |
| int perf_event__process_auxtrace_info(struct perf_session *session, |
| union perf_event *event) |
| { |
| enum auxtrace_type type = event->auxtrace_info.type; |
| int err; |
| |
| if (dump_trace) |
| fprintf(stdout, " type: %u\n", type); |
| |
| switch (type) { |
| case PERF_AUXTRACE_INTEL_PT: |
| err = intel_pt_process_auxtrace_info(event, session); |
| break; |
| case PERF_AUXTRACE_INTEL_BTS: |
| err = intel_bts_process_auxtrace_info(event, session); |
| break; |
| case PERF_AUXTRACE_ARM_SPE: |
| err = arm_spe_process_auxtrace_info(event, session); |
| break; |
| case PERF_AUXTRACE_CS_ETM: |
| err = cs_etm__process_auxtrace_info(event, session); |
| break; |
| case PERF_AUXTRACE_S390_CPUMSF: |
| err = s390_cpumsf_process_auxtrace_info(event, session); |
| break; |
| case PERF_AUXTRACE_UNKNOWN: |
| default: |
| return -EINVAL; |
| } |
| |
| if (err) |
| return err; |
| |
| unleader_auxtrace(session); |
| |
| return 0; |
| } |
| |
| s64 perf_event__process_auxtrace(struct perf_session *session, |
| union perf_event *event) |
| { |
| s64 err; |
| |
| if (dump_trace) |
| fprintf(stdout, " size: %#"PRI_lx64" offset: %#"PRI_lx64" ref: %#"PRI_lx64" idx: %u tid: %d cpu: %d\n", |
| event->auxtrace.size, event->auxtrace.offset, |
| event->auxtrace.reference, event->auxtrace.idx, |
| event->auxtrace.tid, event->auxtrace.cpu); |
| |
| if (auxtrace__dont_decode(session)) |
| return event->auxtrace.size; |
| |
| if (!session->auxtrace || event->header.type != PERF_RECORD_AUXTRACE) |
| return -EINVAL; |
| |
| err = session->auxtrace->process_auxtrace_event(session, event, session->tool); |
| if (err < 0) |
| return err; |
| |
| return event->auxtrace.size; |
| } |
| |
| #define PERF_ITRACE_DEFAULT_PERIOD_TYPE PERF_ITRACE_PERIOD_NANOSECS |
| #define PERF_ITRACE_DEFAULT_PERIOD 100000 |
| #define PERF_ITRACE_DEFAULT_CALLCHAIN_SZ 16 |
| #define PERF_ITRACE_MAX_CALLCHAIN_SZ 1024 |
| #define PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ 64 |
| #define PERF_ITRACE_MAX_LAST_BRANCH_SZ 1024 |
| |
| void itrace_synth_opts__set_default(struct itrace_synth_opts *synth_opts, |
| bool no_sample) |
| { |
| synth_opts->branches = true; |
| synth_opts->transactions = true; |
| synth_opts->ptwrites = true; |
| synth_opts->pwr_events = true; |
| synth_opts->other_events = true; |
| synth_opts->errors = true; |
| synth_opts->flc = true; |
| synth_opts->llc = true; |
| synth_opts->tlb = true; |
| synth_opts->remote_access = true; |
| |
| if (no_sample) { |
| synth_opts->period_type = PERF_ITRACE_PERIOD_INSTRUCTIONS; |
| synth_opts->period = 1; |
| synth_opts->calls = true; |
| } else { |
| synth_opts->instructions = true; |
| synth_opts->period_type = PERF_ITRACE_DEFAULT_PERIOD_TYPE; |
| synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD; |
| } |
| synth_opts->callchain_sz = PERF_ITRACE_DEFAULT_CALLCHAIN_SZ; |
| synth_opts->last_branch_sz = PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ; |
| synth_opts->initial_skip = 0; |
| } |
| |
| /* |
| * Please check tools/perf/Documentation/perf-script.txt for information |
| * about the options parsed here, which is introduced after this cset, |
| * when support in 'perf script' for these options is introduced. |
| */ |
| int itrace_parse_synth_opts(const struct option *opt, const char *str, |
| int unset) |
| { |
| struct itrace_synth_opts *synth_opts = opt->value; |
| const char *p; |
| char *endptr; |
| bool period_type_set = false; |
| bool period_set = false; |
| |
| synth_opts->set = true; |
| |
| if (unset) { |
| synth_opts->dont_decode = true; |
| return 0; |
| } |
| |
| if (!str) { |
| itrace_synth_opts__set_default(synth_opts, |
| synth_opts->default_no_sample); |
| return 0; |
| } |
| |
| for (p = str; *p;) { |
| switch (*p++) { |
| case 'i': |
| synth_opts->instructions = true; |
| while (*p == ' ' || *p == ',') |
| p += 1; |
| if (isdigit(*p)) { |
| synth_opts->period = strtoull(p, &endptr, 10); |
| period_set = true; |
| p = endptr; |
| while (*p == ' ' || *p == ',') |
| p += 1; |
| switch (*p++) { |
| case 'i': |
| synth_opts->period_type = |
| PERF_ITRACE_PERIOD_INSTRUCTIONS; |
| period_type_set = true; |
| break; |
| case 't': |
| synth_opts->period_type = |
| PERF_ITRACE_PERIOD_TICKS; |
| period_type_set = true; |
| break; |
| case 'm': |
| synth_opts->period *= 1000; |
| /* Fall through */ |
| case 'u': |
| synth_opts->period *= 1000; |
| /* Fall through */ |
| case 'n': |
| if (*p++ != 's') |
| goto out_err; |
| synth_opts->period_type = |
| PERF_ITRACE_PERIOD_NANOSECS; |
| period_type_set = true; |
| break; |
| case '\0': |
| goto out; |
| default: |
| goto out_err; |
| } |
| } |
| break; |
| case 'b': |
| synth_opts->branches = true; |
| break; |
| case 'x': |
| synth_opts->transactions = true; |
| break; |
| case 'w': |
| synth_opts->ptwrites = true; |
| break; |
| case 'p': |
| synth_opts->pwr_events = true; |
| break; |
| case 'o': |
| synth_opts->other_events = true; |
| break; |
| case 'e': |
| synth_opts->errors = true; |
| break; |
| case 'd': |
| synth_opts->log = true; |
| break; |
| case 'c': |
| synth_opts->branches = true; |
| synth_opts->calls = true; |
| break; |
| case 'r': |
| synth_opts->branches = true; |
| synth_opts->returns = true; |
| break; |
| case 'G': |
| case 'g': |
| if (p[-1] == 'G') |
| synth_opts->add_callchain = true; |
| else |
| synth_opts->callchain = true; |
| synth_opts->callchain_sz = |
| PERF_ITRACE_DEFAULT_CALLCHAIN_SZ; |
| while (*p == ' ' || *p == ',') |
| p += 1; |
| if (isdigit(*p)) { |
| unsigned int val; |
| |
| val = strtoul(p, &endptr, 10); |
| p = endptr; |
| if (!val || val > PERF_ITRACE_MAX_CALLCHAIN_SZ) |
| goto out_err; |
| synth_opts->callchain_sz = val; |
| } |
| break; |
| case 'L': |
| case 'l': |
| if (p[-1] == 'L') |
| synth_opts->add_last_branch = true; |
| else |
| synth_opts->last_branch = true; |
| synth_opts->last_branch_sz = |
| PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ; |
| while (*p == ' ' || *p == ',') |
| p += 1; |
| if (isdigit(*p)) { |
| unsigned int val; |
| |
| val = strtoul(p, &endptr, 10); |
| p = endptr; |
| if (!val || |
| val > PERF_ITRACE_MAX_LAST_BRANCH_SZ) |
| goto out_err; |
| synth_opts->last_branch_sz = val; |
| } |
| break; |
| case 's': |
| synth_opts->initial_skip = strtoul(p, &endptr, 10); |
| if (p == endptr) |
| goto out_err; |
| p = endptr; |
| break; |
| case 'f': |
| synth_opts->flc = true; |
| break; |
| case 'm': |
| synth_opts->llc = true; |
| break; |
| case 't': |
| synth_opts->tlb = true; |
| break; |
| case 'a': |
| synth_opts->remote_access = true; |
| break; |
| case ' ': |
| case ',': |
| break; |
| default: |
| goto out_err; |
| } |
| } |
| out: |
| if (synth_opts->instructions) { |
| if (!period_type_set) |
| synth_opts->period_type = |
| PERF_ITRACE_DEFAULT_PERIOD_TYPE; |
| if (!period_set) |
| synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD; |
| } |
| |
| return 0; |
| |
| out_err: |
| pr_err("Bad Instruction Tracing options '%s'\n", str); |
| return -EINVAL; |
| } |
| |
| static const char * const auxtrace_error_type_name[] = { |
| [PERF_AUXTRACE_ERROR_ITRACE] = "instruction trace", |
| }; |
| |
| static const char *auxtrace_error_name(int type) |
| { |
| const char *error_type_name = NULL; |
| |
| if (type < PERF_AUXTRACE_ERROR_MAX) |
| error_type_name = auxtrace_error_type_name[type]; |
| if (!error_type_name) |
| error_type_name = "unknown AUX"; |
| return error_type_name; |
| } |
| |
| size_t perf_event__fprintf_auxtrace_error(union perf_event *event, FILE *fp) |
| { |
| struct perf_record_auxtrace_error *e = &event->auxtrace_error; |
| unsigned long long nsecs = e->time; |
| const char *msg = e->msg; |
| int ret; |
| |
| ret = fprintf(fp, " %s error type %u", |
| auxtrace_error_name(e->type), e->type); |
| |
| if (e->fmt && nsecs) { |
| unsigned long secs = nsecs / NSEC_PER_SEC; |
| |
| nsecs -= secs * NSEC_PER_SEC; |
| ret += fprintf(fp, " time %lu.%09llu", secs, nsecs); |
| } else { |
| ret += fprintf(fp, " time 0"); |
| } |
| |
| if (!e->fmt) |
| msg = (const char *)&e->time; |
| |
| ret += fprintf(fp, " cpu %d pid %d tid %d ip %#"PRI_lx64" code %u: %s\n", |
| e->cpu, e->pid, e->tid, e->ip, e->code, msg); |
| return ret; |
| } |
| |
| void perf_session__auxtrace_error_inc(struct perf_session *session, |
| union perf_event *event) |
| { |
| struct perf_record_auxtrace_error *e = &event->auxtrace_error; |
| |
| if (e->type < PERF_AUXTRACE_ERROR_MAX) |
| session->evlist->stats.nr_auxtrace_errors[e->type] += 1; |
| } |
| |
| void events_stats__auxtrace_error_warn(const struct events_stats *stats) |
| { |
| int i; |
| |
| for (i = 0; i < PERF_AUXTRACE_ERROR_MAX; i++) { |
| if (!stats->nr_auxtrace_errors[i]) |
| continue; |
| ui__warning("%u %s errors\n", |
| stats->nr_auxtrace_errors[i], |
| auxtrace_error_name(i)); |
| } |
| } |
| |
| int perf_event__process_auxtrace_error(struct perf_session *session, |
| union perf_event *event) |
| { |
| if (auxtrace__dont_decode(session)) |
| return 0; |
| |
| perf_event__fprintf_auxtrace_error(event, stdout); |
| return 0; |
| } |
| |
| static int __auxtrace_mmap__read(struct mmap *map, |
| struct auxtrace_record *itr, |
| struct perf_tool *tool, process_auxtrace_t fn, |
| bool snapshot, size_t snapshot_size) |
| { |
| struct auxtrace_mmap *mm = &map->auxtrace_mmap; |
| u64 head, old = mm->prev, offset, ref; |
| unsigned char *data = mm->base; |
| size_t size, head_off, old_off, len1, len2, padding; |
| union perf_event ev; |
| void *data1, *data2; |
| |
| if (snapshot) { |
| head = auxtrace_mmap__read_snapshot_head(mm); |
| if (auxtrace_record__find_snapshot(itr, mm->idx, mm, data, |
| &head, &old)) |
| return -1; |
| } else { |
| head = auxtrace_mmap__read_head(mm); |
| } |
| |
| if (old == head) |
| return 0; |
| |
| pr_debug3("auxtrace idx %d old %#"PRIx64" head %#"PRIx64" diff %#"PRIx64"\n", |
| mm->idx, old, head, head - old); |
| |
| if (mm->mask) { |
| head_off = head & mm->mask; |
| old_off = old & mm->mask; |
| } else { |
| head_off = head % mm->len; |
| old_off = old % mm->len; |
| } |
| |
| if (head_off > old_off) |
| size = head_off - old_off; |
| else |
| size = mm->len - (old_off - head_off); |
| |
| if (snapshot && size > snapshot_size) |
| size = snapshot_size; |
| |
| ref = auxtrace_record__reference(itr); |
| |
| if (head > old || size <= head || mm->mask) { |
| offset = head - size; |
| } else { |
| /* |
| * When the buffer size is not a power of 2, 'head' wraps at the |
| * highest multiple of the buffer size, so we have to subtract |
| * the remainder here. |
| */ |
| u64 rem = (0ULL - mm->len) % mm->len; |
| |
| offset = head - size - rem; |
| } |
| |
| if (size > head_off) { |
| len1 = size - head_off; |
| data1 = &data[mm->len - len1]; |
| len2 = head_off; |
| data2 = &data[0]; |
| } else { |
| len1 = size; |
| data1 = &data[head_off - len1]; |
| len2 = 0; |
| data2 = NULL; |
| } |
| |
| if (itr->alignment) { |
| unsigned int unwanted = len1 % itr->alignment; |
| |
| len1 -= unwanted; |
| size -= unwanted; |
| } |
| |
| /* padding must be written by fn() e.g. record__process_auxtrace() */ |
| padding = size & (PERF_AUXTRACE_RECORD_ALIGNMENT - 1); |
| if (padding) |
| padding = PERF_AUXTRACE_RECORD_ALIGNMENT - padding; |
| |
| memset(&ev, 0, sizeof(ev)); |
| ev.auxtrace.header.type = PERF_RECORD_AUXTRACE; |
| ev.auxtrace.header.size = sizeof(ev.auxtrace); |
| ev.auxtrace.size = size + padding; |
| ev.auxtrace.offset = offset; |
| ev.auxtrace.reference = ref; |
| ev.auxtrace.idx = mm->idx; |
| ev.auxtrace.tid = mm->tid; |
| ev.auxtrace.cpu = mm->cpu; |
| |
| if (fn(tool, map, &ev, data1, len1, data2, len2)) |
| return -1; |
| |
| mm->prev = head; |
| |
| if (!snapshot) { |
| auxtrace_mmap__write_tail(mm, head); |
| if (itr->read_finish) { |
| int err; |
| |
| err = itr->read_finish(itr, mm->idx); |
| if (err < 0) |
| return err; |
| } |
| } |
| |
| return 1; |
| } |
| |
| int auxtrace_mmap__read(struct mmap *map, struct auxtrace_record *itr, |
| struct perf_tool *tool, process_auxtrace_t fn) |
| { |
| return __auxtrace_mmap__read(map, itr, tool, fn, false, 0); |
| } |
| |
| int auxtrace_mmap__read_snapshot(struct mmap *map, |
| struct auxtrace_record *itr, |
| struct perf_tool *tool, process_auxtrace_t fn, |
| size_t snapshot_size) |
| { |
| return __auxtrace_mmap__read(map, itr, tool, fn, true, snapshot_size); |
| } |
| |
| /** |
| * struct auxtrace_cache - hash table to implement a cache |
| * @hashtable: the hashtable |
| * @sz: hashtable size (number of hlists) |
| * @entry_size: size of an entry |
| * @limit: limit the number of entries to this maximum, when reached the cache |
| * is dropped and caching begins again with an empty cache |
| * @cnt: current number of entries |
| * @bits: hashtable size (@sz = 2^@bits) |
| */ |
| struct auxtrace_cache { |
| struct hlist_head *hashtable; |
| size_t sz; |
| size_t entry_size; |
| size_t limit; |
| size_t cnt; |
| unsigned int bits; |
| }; |
| |
| struct auxtrace_cache *auxtrace_cache__new(unsigned int bits, size_t entry_size, |
| unsigned int limit_percent) |
| { |
| struct auxtrace_cache *c; |
| struct hlist_head *ht; |
| size_t sz, i; |
| |
| c = zalloc(sizeof(struct auxtrace_cache)); |
| if (!c) |
| return NULL; |
| |
| sz = 1UL << bits; |
| |
| ht = calloc(sz, sizeof(struct hlist_head)); |
| if (!ht) |
| goto out_free; |
| |
| for (i = 0; i < sz; i++) |
| INIT_HLIST_HEAD(&ht[i]); |
| |
| c->hashtable = ht; |
| c->sz = sz; |
| c->entry_size = entry_size; |
| c->limit = (c->sz * limit_percent) / 100; |
| c->bits = bits; |
| |
| return c; |
| |
| out_free: |
| free(c); |
| return NULL; |
| } |
| |
| static void auxtrace_cache__drop(struct auxtrace_cache *c) |
| { |
| struct auxtrace_cache_entry *entry; |
| struct hlist_node *tmp; |
| size_t i; |
| |
| if (!c) |
| return; |
| |
| for (i = 0; i < c->sz; i++) { |
| hlist_for_each_entry_safe(entry, tmp, &c->hashtable[i], hash) { |
| hlist_del(&entry->hash); |
| auxtrace_cache__free_entry(c, entry); |
| } |
| } |
| |
| c->cnt = 0; |
| } |
| |
| void auxtrace_cache__free(struct auxtrace_cache *c) |
| { |
| if (!c) |
| return; |
| |
| auxtrace_cache__drop(c); |
| zfree(&c->hashtable); |
| free(c); |
| } |
| |
| void *auxtrace_cache__alloc_entry(struct auxtrace_cache *c) |
| { |
| return malloc(c->entry_size); |
| } |
| |
| void auxtrace_cache__free_entry(struct auxtrace_cache *c __maybe_unused, |
| void *entry) |
| { |
| free(entry); |
| } |
| |
| int auxtrace_cache__add(struct auxtrace_cache *c, u32 key, |
| struct auxtrace_cache_entry *entry) |
| { |
| if (c->limit && ++c->cnt > c->limit) |
| auxtrace_cache__drop(c); |
| |
| entry->key = key; |
| hlist_add_head(&entry->hash, &c->hashtable[hash_32(key, c->bits)]); |
| |
| return 0; |
| } |
| |
| static struct auxtrace_cache_entry *auxtrace_cache__rm(struct auxtrace_cache *c, |
| u32 key) |
| { |
| struct auxtrace_cache_entry *entry; |
| struct hlist_head *hlist; |
| struct hlist_node *n; |
| |
| if (!c) |
| return NULL; |
| |
| hlist = &c->hashtable[hash_32(key, c->bits)]; |
| hlist_for_each_entry_safe(entry, n, hlist, hash) { |
| if (entry->key == key) { |
| hlist_del(&entry->hash); |
| return entry; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| void auxtrace_cache__remove(struct auxtrace_cache *c, u32 key) |
| { |
| struct auxtrace_cache_entry *entry = auxtrace_cache__rm(c, key); |
| |
| auxtrace_cache__free_entry(c, entry); |
| } |
| |
| void *auxtrace_cache__lookup(struct auxtrace_cache *c, u32 key) |
| { |
| struct auxtrace_cache_entry *entry; |
| struct hlist_head *hlist; |
| |
| if (!c) |
| return NULL; |
| |
| hlist = &c->hashtable[hash_32(key, c->bits)]; |
| hlist_for_each_entry(entry, hlist, hash) { |
| if (entry->key == key) |
| return entry; |
| } |
| |
| return NULL; |
| } |
| |
| static void addr_filter__free_str(struct addr_filter *filt) |
| { |
| zfree(&filt->str); |
| filt->action = NULL; |
| filt->sym_from = NULL; |
| filt->sym_to = NULL; |
| filt->filename = NULL; |
| } |
| |
| static struct addr_filter *addr_filter__new(void) |
| { |
| struct addr_filter *filt = zalloc(sizeof(*filt)); |
| |
| if (filt) |
| INIT_LIST_HEAD(&filt->list); |
| |
| return filt; |
| } |
| |
| static void addr_filter__free(struct addr_filter *filt) |
| { |
| if (filt) |
| addr_filter__free_str(filt); |
| free(filt); |
| } |
| |
| static void addr_filters__add(struct addr_filters *filts, |
| struct addr_filter *filt) |
| { |
| list_add_tail(&filt->list, &filts->head); |
| filts->cnt += 1; |
| } |
| |
| static void addr_filters__del(struct addr_filters *filts, |
| struct addr_filter *filt) |
| { |
| list_del_init(&filt->list); |
| filts->cnt -= 1; |
| } |
| |
| void addr_filters__init(struct addr_filters *filts) |
| { |
| INIT_LIST_HEAD(&filts->head); |
| filts->cnt = 0; |
| } |
| |
| void addr_filters__exit(struct addr_filters *filts) |
| { |
| struct addr_filter *filt, *n; |
| |
| list_for_each_entry_safe(filt, n, &filts->head, list) { |
| addr_filters__del(filts, filt); |
| addr_filter__free(filt); |
| } |
| } |
| |
| static int parse_num_or_str(char **inp, u64 *num, const char **str, |
| const char *str_delim) |
| { |
| *inp += strspn(*inp, " "); |
| |
| if (isdigit(**inp)) { |
| char *endptr; |
| |
| if (!num) |
| return -EINVAL; |
| errno = 0; |
| *num = strtoull(*inp, &endptr, 0); |
| if (errno) |
| return -errno; |
| if (endptr == *inp) |
| return -EINVAL; |
| *inp = endptr; |
| } else { |
| size_t n; |
| |
| if (!str) |
| return -EINVAL; |
| *inp += strspn(*inp, " "); |
| *str = *inp; |
| n = strcspn(*inp, str_delim); |
| if (!n) |
| return -EINVAL; |
| *inp += n; |
| if (**inp) { |
| **inp = '\0'; |
| *inp += 1; |
| } |
| } |
| return 0; |
| } |
| |
| static int parse_action(struct addr_filter *filt) |
| { |
| if (!strcmp(filt->action, "filter")) { |
| filt->start = true; |
| filt->range = true; |
| } else if (!strcmp(filt->action, "start")) { |
| filt->start = true; |
| } else if (!strcmp(filt->action, "stop")) { |
| filt->start = false; |
| } else if (!strcmp(filt->action, "tracestop")) { |
| filt->start = false; |
| filt->range = true; |
| filt->action += 5; /* Change 'tracestop' to 'stop' */ |
| } else { |
| return -EINVAL; |
| } |
| return 0; |
| } |
| |
| static int parse_sym_idx(char **inp, int *idx) |
| { |
| *idx = -1; |
| |
| *inp += strspn(*inp, " "); |
| |
| if (**inp != '#') |
| return 0; |
| |
| *inp += 1; |
| |
| if (**inp == 'g' || **inp == 'G') { |
| *inp += 1; |
| *idx = 0; |
| } else { |
| unsigned long num; |
| char *endptr; |
| |
| errno = 0; |
| num = strtoul(*inp, &endptr, 0); |
| if (errno) |
| return -errno; |
| if (endptr == *inp || num > INT_MAX) |
| return -EINVAL; |
| *inp = endptr; |
| *idx = num; |
| } |
| |
| return 0; |
| } |
| |
| static int parse_addr_size(char **inp, u64 *num, const char **str, int *idx) |
| { |
| int err = parse_num_or_str(inp, num, str, " "); |
| |
| if (!err && *str) |
| err = parse_sym_idx(inp, idx); |
| |
| return err; |
| } |
| |
| static int parse_one_filter(struct addr_filter *filt, const char **filter_inp) |
| { |
| char *fstr; |
| int err; |
| |
| filt->str = fstr = strdup(*filter_inp); |
| if (!fstr) |
| return -ENOMEM; |
| |
| err = parse_num_or_str(&fstr, NULL, &filt->action, " "); |
| if (err) |
| goto out_err; |
| |
| err = parse_action(filt); |
| if (err) |
| goto out_err; |
| |
| err = parse_addr_size(&fstr, &filt->addr, &filt->sym_from, |
| &filt->sym_from_idx); |
| if (err) |
| goto out_err; |
| |
| fstr += strspn(fstr, " "); |
| |
| if (*fstr == '/') { |
| fstr += 1; |
| err = parse_addr_size(&fstr, &filt->size, &filt->sym_to, |
| &filt->sym_to_idx); |
| if (err) |
| goto out_err; |
| filt->range = true; |
| } |
| |
| fstr += strspn(fstr, " "); |
| |
| if (*fstr == '@') { |
| fstr += 1; |
| err = parse_num_or_str(&fstr, NULL, &filt->filename, " ,"); |
| if (err) |
| goto out_err; |
| } |
| |
| fstr += strspn(fstr, " ,"); |
| |
| *filter_inp += fstr - filt->str; |
| |
| return 0; |
| |
| out_err: |
| addr_filter__free_str(filt); |
| |
| return err; |
| } |
| |
| int addr_filters__parse_bare_filter(struct addr_filters *filts, |
| const char *filter) |
| { |
| struct addr_filter *filt; |
| const char *fstr = filter; |
| int err; |
| |
| while (*fstr) { |
| filt = addr_filter__new(); |
| err = parse_one_filter(filt, &fstr); |
| if (err) { |
| addr_filter__free(filt); |
| addr_filters__exit(filts); |
| return err; |
| } |
| addr_filters__add(filts, filt); |
| } |
| |
| return 0; |
| } |
| |
| struct sym_args { |
| const char *name; |
| u64 start; |
| u64 size; |
| int idx; |
| int cnt; |
| bool started; |
| bool global; |
| bool selected; |
| bool duplicate; |
| bool near; |
| }; |
| |
| static bool kern_sym_match(struct sym_args *args, const char *name, char type) |
| { |
| /* A function with the same name, and global or the n'th found or any */ |
| return kallsyms__is_function(type) && |
| !strcmp(name, args->name) && |
| ((args->global && isupper(type)) || |
| (args->selected && ++(args->cnt) == args->idx) || |
| (!args->global && !args->selected)); |
| } |
| |
| static int find_kern_sym_cb(void *arg, const char *name, char type, u64 start) |
| { |
| struct sym_args *args = arg; |
| |
| if (args->started) { |
| if (!args->size) |
| args->size = start - args->start; |
| if (args->selected) { |
| if (args->size) |
| return 1; |
| } else if (kern_sym_match(args, name, type)) { |
| args->duplicate = true; |
| return 1; |
| } |
| } else if (kern_sym_match(args, name, type)) { |
| args->started = true; |
| args->start = start; |
| } |
| |
| return 0; |
| } |
| |
| static int print_kern_sym_cb(void *arg, const char *name, char type, u64 start) |
| { |
| struct sym_args *args = arg; |
| |
| if (kern_sym_match(args, name, type)) { |
| pr_err("#%d\t0x%"PRIx64"\t%c\t%s\n", |
| ++args->cnt, start, type, name); |
| args->near = true; |
| } else if (args->near) { |
| args->near = false; |
| pr_err("\t\twhich is near\t\t%s\n", name); |
| } |
| |
| return 0; |
| } |
| |
| static int sym_not_found_error(const char *sym_name, int idx) |
| { |
| if (idx > 0) { |
| pr_err("N'th occurrence (N=%d) of symbol '%s' not found.\n", |
| idx, sym_name); |
| } else if (!idx) { |
| pr_err("Global symbol '%s' not found.\n", sym_name); |
| } else { |
| pr_err("Symbol '%s' not found.\n", sym_name); |
| } |
| pr_err("Note that symbols must be functions.\n"); |
| |
| return -EINVAL; |
| } |
| |
| static int find_kern_sym(const char *sym_name, u64 *start, u64 *size, int idx) |
| { |
| struct sym_args args = { |
| .name = sym_name, |
| .idx = idx, |
| .global = !idx, |
| .selected = idx > 0, |
| }; |
| int err; |
| |
| *start = 0; |
| *size = 0; |
| |
| err = kallsyms__parse("/proc/kallsyms", &args, find_kern_sym_cb); |
| if (err < 0) { |
| pr_err("Failed to parse /proc/kallsyms\n"); |
| return err; |
| } |
| |
| if (args.duplicate) { |
| pr_err("Multiple kernel symbols with name '%s'\n", sym_name); |
| args.cnt = 0; |
| kallsyms__parse("/proc/kallsyms", &args, print_kern_sym_cb); |
| pr_err("Disambiguate symbol name by inserting #n after the name e.g. %s #2\n", |
| sym_name); |
| pr_err("Or select a global symbol by inserting #0 or #g or #G\n"); |
| return -EINVAL; |
| } |
| |
| if (!args.started) { |
| pr_err("Kernel symbol lookup: "); |
| return sym_not_found_error(sym_name, idx); |
| } |
| |
| *start = args.start; |
| *size = args.size; |
| |
| return 0; |
| } |
| |
| static int find_entire_kern_cb(void *arg, const char *name __maybe_unused, |
| char type, u64 start) |
| { |
| struct sym_args *args = arg; |
| |
| if (!kallsyms__is_function(type)) |
| return 0; |
| |
| if (!args->started) { |
| args->started = true; |
| args->start = start; |
| } |
| /* Don't know exactly where the kernel ends, so we add a page */ |
| args->size = round_up(start, page_size) + page_size - args->start; |
| |
| return 0; |
| } |
| |
| static int addr_filter__entire_kernel(struct addr_filter *filt) |
| { |
| struct sym_args args = { .started = false }; |
| int err; |
| |
| err = kallsyms__parse("/proc/kallsyms", &args, find_entire_kern_cb); |
| if (err < 0 || !args.started) { |
| pr_err("Failed to parse /proc/kallsyms\n"); |
| return err; |
| } |
| |
| filt->addr = args.start; |
| filt->size = args.size; |
| |
| return 0; |
| } |
| |
| static int check_end_after_start(struct addr_filter *filt, u64 start, u64 size) |
| { |
| if (start + size >= filt->addr) |
| return 0; |
| |
| if (filt->sym_from) { |
| pr_err("Symbol '%s' (0x%"PRIx64") comes before '%s' (0x%"PRIx64")\n", |
| filt->sym_to, start, filt->sym_from, filt->addr); |
| } else { |
| pr_err("Symbol '%s' (0x%"PRIx64") comes before address 0x%"PRIx64")\n", |
| filt->sym_to, start, filt->addr); |
| } |
| |
| return -EINVAL; |
| } |
| |
| static int addr_filter__resolve_kernel_syms(struct addr_filter *filt) |
| { |
| bool no_size = false; |
| u64 start, size; |
| int err; |
| |
| if (symbol_conf.kptr_restrict) { |
| pr_err("Kernel addresses are restricted. Unable to resolve kernel symbols.\n"); |
| return -EINVAL; |
| } |
| |
| if (filt->sym_from && !strcmp(filt->sym_from, "*")) |
| return addr_filter__entire_kernel(filt); |
| |
| if (filt->sym_from) { |
| err = find_kern_sym(filt->sym_from, &start, &size, |
| filt->sym_from_idx); |
| if (err) |
| return err; |
| filt->addr = start; |
| if (filt->range && !filt->size && !filt->sym_to) { |
| filt->size = size; |
| no_size = !size; |
| } |
| } |
| |
| if (filt->sym_to) { |
| err = find_kern_sym(filt->sym_to, &start, &size, |
| filt->sym_to_idx); |
| if (err) |
| return err; |
| |
| err = check_end_after_start(filt, start, size); |
| if (err) |
| return err; |
| filt->size = start + size - filt->addr; |
| no_size = !size; |
| } |
| |
| /* The very last symbol in kallsyms does not imply a particular size */ |
| if (no_size) { |
| pr_err("Cannot determine size of symbol '%s'\n", |
| filt->sym_to ? filt->sym_to : filt->sym_from); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static struct dso *load_dso(const char *name) |
| { |
| struct map *map; |
| struct dso *dso; |
| |
| map = dso__new_map(name); |
| if (!map) |
| return NULL; |
| |
| if (map__load(map) < 0) |
| pr_err("File '%s' not found or has no symbols.\n", name); |
| |
| dso = dso__get(map->dso); |
| |
| map__put(map); |
| |
| return dso; |
| } |
| |
| static bool dso_sym_match(struct symbol *sym, const char *name, int *cnt, |
| int idx) |
| { |
| /* Same name, and global or the n'th found or any */ |
| return !arch__compare_symbol_names(name, sym->name) && |
| ((!idx && sym->binding == STB_GLOBAL) || |
| (idx > 0 && ++*cnt == idx) || |
| idx < 0); |
| } |
| |
| static void print_duplicate_syms(struct dso *dso, const char *sym_name) |
| { |
| struct symbol *sym; |
| bool near = false; |
| int cnt = 0; |
| |
| pr_err("Multiple symbols with name '%s'\n", sym_name); |
| |
| sym = dso__first_symbol(dso); |
| while (sym) { |
| if (dso_sym_match(sym, sym_name, &cnt, -1)) { |
| pr_err("#%d\t0x%"PRIx64"\t%c\t%s\n", |
| ++cnt, sym->start, |
| sym->binding == STB_GLOBAL ? 'g' : |
| sym->binding == STB_LOCAL ? 'l' : 'w', |
| sym->name); |
| near = true; |
| } else if (near) { |
| near = false; |
| pr_err("\t\twhich is near\t\t%s\n", sym->name); |
| } |
| sym = dso__next_symbol(sym); |
| } |
| |
| pr_err("Disambiguate symbol name by inserting #n after the name e.g. %s #2\n", |
| sym_name); |
| pr_err("Or select a global symbol by inserting #0 or #g or #G\n"); |
| } |
| |
| static int find_dso_sym(struct dso *dso, const char *sym_name, u64 *start, |
| u64 *size, int idx) |
| { |
| struct symbol *sym; |
| int cnt = 0; |
| |
| *start = 0; |
| *size = 0; |
| |
| sym = dso__first_symbol(dso); |
| while (sym) { |
| if (*start) { |
| if (!*size) |
| *size = sym->start - *start; |
| if (idx > 0) { |
| if (*size) |
| return 1; |
| } else if (dso_sym_match(sym, sym_name, &cnt, idx)) { |
| print_duplicate_syms(dso, sym_name); |
| return -EINVAL; |
| } |
| } else if (dso_sym_match(sym, sym_name, &cnt, idx)) { |
| *start = sym->start; |
| *size = sym->end - sym->start; |
| } |
| sym = dso__next_symbol(sym); |
| } |
| |
| if (!*start) |
| return sym_not_found_error(sym_name, idx); |
| |
| return 0; |
| } |
| |
| static int addr_filter__entire_dso(struct addr_filter *filt, struct dso *dso) |
| { |
| if (dso__data_file_size(dso, NULL)) { |
| pr_err("Failed to determine filter for %s\nCannot determine file size.\n", |
| filt->filename); |
| return -EINVAL; |
| } |
| |
| filt->addr = 0; |
| filt->size = dso->data.file_size; |
| |
| return 0; |
| } |
| |
| static int addr_filter__resolve_syms(struct addr_filter *filt) |
| { |
| u64 start, size; |
| struct dso *dso; |
| int err = 0; |
| |
| if (!filt->sym_from && !filt->sym_to) |
| return 0; |
| |
| if (!filt->filename) |
| return addr_filter__resolve_kernel_syms(filt); |
| |
| dso = load_dso(filt->filename); |
| if (!dso) { |
| pr_err("Failed to load symbols from: %s\n", filt->filename); |
| return -EINVAL; |
| } |
| |
| if (filt->sym_from && !strcmp(filt->sym_from, "*")) { |
| err = addr_filter__entire_dso(filt, dso); |
| goto put_dso; |
| } |
| |
| if (filt->sym_from) { |
| err = find_dso_sym(dso, filt->sym_from, &start, &size, |
| filt->sym_from_idx); |
| if (err) |
| goto put_dso; |
| filt->addr = start; |
| if (filt->range && !filt->size && !filt->sym_to) |
| filt->size = size; |
| } |
| |
| if (filt->sym_to) { |
| err = find_dso_sym(dso, filt->sym_to, &start, &size, |
| filt->sym_to_idx); |
| if (err) |
| goto put_dso; |
| |
| err = check_end_after_start(filt, start, size); |
| if (err) |
| return err; |
| |
| filt->size = start + size - filt->addr; |
| } |
| |
| put_dso: |
| dso__put(dso); |
| |
| return err; |
| } |
| |
| static char *addr_filter__to_str(struct addr_filter *filt) |
| { |
| char filename_buf[PATH_MAX]; |
| const char *at = ""; |
| const char *fn = ""; |
| char *filter; |
| int err; |
| |
| if (filt->filename) { |
| at = "@"; |
| fn = realpath(filt->filename, filename_buf); |
| if (!fn) |
| return NULL; |
| } |
| |
| if (filt->range) { |
| err = asprintf(&filter, "%s 0x%"PRIx64"/0x%"PRIx64"%s%s", |
| filt->action, filt->addr, filt->size, at, fn); |
| } else { |
| err = asprintf(&filter, "%s 0x%"PRIx64"%s%s", |
| filt->action, filt->addr, at, fn); |
| } |
| |
| return err < 0 ? NULL : filter; |
| } |
| |
| static int parse_addr_filter(struct evsel *evsel, const char *filter, |
| int max_nr) |
| { |
| struct addr_filters filts; |
| struct addr_filter *filt; |
| int err; |
| |
| addr_filters__init(&filts); |
| |
| err = addr_filters__parse_bare_filter(&filts, filter); |
| if (err) |
| goto out_exit; |
| |
| if (filts.cnt > max_nr) { |
| pr_err("Error: number of address filters (%d) exceeds maximum (%d)\n", |
| filts.cnt, max_nr); |
| err = -EINVAL; |
| goto out_exit; |
| } |
| |
| list_for_each_entry(filt, &filts.head, list) { |
| char *new_filter; |
| |
| err = addr_filter__resolve_syms(filt); |
| if (err) |
| goto out_exit; |
| |
| new_filter = addr_filter__to_str(filt); |
| if (!new_filter) { |
| err = -ENOMEM; |
| goto out_exit; |
| } |
| |
| if (evsel__append_addr_filter(evsel, new_filter)) { |
| err = -ENOMEM; |
| goto out_exit; |
| } |
| } |
| |
| out_exit: |
| addr_filters__exit(&filts); |
| |
| if (err) { |
| pr_err("Failed to parse address filter: '%s'\n", filter); |
| pr_err("Filter format is: filter|start|stop|tracestop <start symbol or address> [/ <end symbol or size>] [@<file name>]\n"); |
| pr_err("Where multiple filters are separated by space or comma.\n"); |
| } |
| |
| return err; |
| } |
| |
| static int evsel__nr_addr_filter(struct evsel *evsel) |
| { |
| struct perf_pmu *pmu = evsel__find_pmu(evsel); |
| int nr_addr_filters = 0; |
| |
| if (!pmu) |
| return 0; |
| |
| perf_pmu__scan_file(pmu, "nr_addr_filters", "%d", &nr_addr_filters); |
| |
| return nr_addr_filters; |
| } |
| |
| int auxtrace_parse_filters(struct evlist *evlist) |
| { |
| struct evsel *evsel; |
| char *filter; |
| int err, max_nr; |
| |
| evlist__for_each_entry(evlist, evsel) { |
| filter = evsel->filter; |
| max_nr = evsel__nr_addr_filter(evsel); |
| if (!filter || !max_nr) |
| continue; |
| evsel->filter = NULL; |
| err = parse_addr_filter(evsel, filter, max_nr); |
| free(filter); |
| if (err) |
| return err; |
| pr_debug("Address filter: %s\n", evsel->filter); |
| } |
| |
| return 0; |
| } |
| |
| int auxtrace__process_event(struct perf_session *session, union perf_event *event, |
| struct perf_sample *sample, struct perf_tool *tool) |
| { |
| if (!session->auxtrace) |
| return 0; |
| |
| return session->auxtrace->process_event(session, event, sample, tool); |
| } |
| |
| void auxtrace__dump_auxtrace_sample(struct perf_session *session, |
| struct perf_sample *sample) |
| { |
| if (!session->auxtrace || !session->auxtrace->dump_auxtrace_sample || |
| auxtrace__dont_decode(session)) |
| return; |
| |
| session->auxtrace->dump_auxtrace_sample(session, sample); |
| } |
| |
| int auxtrace__flush_events(struct perf_session *session, struct perf_tool *tool) |
| { |
| if (!session->auxtrace) |
| return 0; |
| |
| return session->auxtrace->flush_events(session, tool); |
| } |
| |
| void auxtrace__free_events(struct perf_session *session) |
| { |
| if (!session->auxtrace) |
| return; |
| |
| return session->auxtrace->free_events(session); |
| } |
| |
| void auxtrace__free(struct perf_session *session) |
| { |
| if (!session->auxtrace) |
| return; |
| |
| return session->auxtrace->free(session); |
| } |
| |
| bool auxtrace__evsel_is_auxtrace(struct perf_session *session, |
| struct evsel *evsel) |
| { |
| if (!session->auxtrace || !session->auxtrace->evsel_is_auxtrace) |
| return false; |
| |
| return session->auxtrace->evsel_is_auxtrace(session, evsel); |
| } |