diff options
Diffstat (limited to 'tools/perf/util/auxtrace.c')
| -rw-r--r-- | tools/perf/util/auxtrace.c | 2166 |
1 files changed, 2166 insertions, 0 deletions
diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c new file mode 100644 index 000000000..f7c4dcb9d --- /dev/null +++ b/tools/perf/util/auxtrace.c @@ -0,0 +1,2166 @@ +/* + * auxtrace.c: AUX area trace support + * Copyright (c) 2013-2015, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + */ + +#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 <sys/param.h> +#include <stdlib.h> +#include <stdio.h> +#include <linux/list.h> + +#include "../perf.h" +#include "util.h" +#include "evlist.h" +#include "dso.h" +#include "map.h" +#include "pmu.h" +#include "evsel.h" +#include "cpumap.h" +#include "thread_map.h" +#include "asm/bug.h" +#include "auxtrace.h" + +#include <linux/hash.h> + +#include "event.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 "sane_ctype.h" +#include "symbol/kallsyms.h" + +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 perf_evlist *evlist, int idx, + bool per_cpu) +{ + mp->idx = idx; + + if (per_cpu) { + mp->cpu = evlist->cpus->map[idx]; + if (evlist->threads) + mp->tid = thread_map__pid(evlist->threads, 0); + else + mp->tid = -1; + } else { + mp->cpu = -1; + mp->tid = thread_map__pid(evlist->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; + } + + 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 auxtrace_event) || + 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(&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 perf_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 auxtrace_info_event *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) +{ + if (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 perf_evlist *evlist, + struct record_opts *opts) +{ + if (itr) + 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; + + if (itr) + return itr->parse_snapshot_options(itr, opts, str); + + pr_err("No AUX area tracing to snapshot\n"); + return -EINVAL; +} + +struct auxtrace_record *__weak +auxtrace_record__init(struct perf_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(&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); + } +} + +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 auxtrace_error_event *auxtrace_error, int type, + int code, int cpu, pid_t pid, pid_t tid, u64 ip, + const char *msg) +{ + size_t size; + + memset(auxtrace_error, 0, sizeof(struct auxtrace_error_event)); + + 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->ip = ip; + 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 auxtrace_info_event) + priv_size); + if (!ev) + return -ENOMEM; + + ev->auxtrace_info.header.type = PERF_RECORD_AUXTRACE_INFO; + ev->auxtrace_info.header.size = sizeof(struct auxtrace_info_event) + + 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; +} + +int perf_event__process_auxtrace_info(struct perf_tool *tool __maybe_unused, + union perf_event *event, + struct perf_session *session) +{ + enum auxtrace_type type = event->auxtrace_info.type; + + if (dump_trace) + fprintf(stdout, " type: %u\n", type); + + switch (type) { + case PERF_AUXTRACE_INTEL_PT: + return intel_pt_process_auxtrace_info(event, session); + case PERF_AUXTRACE_INTEL_BTS: + return intel_bts_process_auxtrace_info(event, session); + case PERF_AUXTRACE_ARM_SPE: + return arm_spe_process_auxtrace_info(event, session); + case PERF_AUXTRACE_CS_ETM: + return cs_etm__process_auxtrace_info(event, session); + case PERF_AUXTRACE_S390_CPUMSF: + return s390_cpumsf_process_auxtrace_info(event, session); + case PERF_AUXTRACE_UNKNOWN: + default: + return -EINVAL; + } +} + +s64 perf_event__process_auxtrace(struct perf_tool *tool, + union perf_event *event, + struct perf_session *session) +{ + s64 err; + + if (dump_trace) + fprintf(stdout, " size: %#"PRIx64" offset: %#"PRIx64" ref: %#"PRIx64" 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, 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) +{ + synth_opts->instructions = true; + synth_opts->branches = true; + synth_opts->transactions = true; + synth_opts->ptwrites = true; + synth_opts->pwr_events = true; + synth_opts->errors = 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); + 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 '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': + 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': + 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 ' ': + 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 auxtrace_error_event *e = &event->auxtrace_error; + int ret; + + ret = fprintf(fp, " %s error type %u", + auxtrace_error_name(e->type), e->type); + ret += fprintf(fp, " cpu %d pid %d tid %d ip %#"PRIx64" code %u: %s\n", + e->cpu, e->pid, e->tid, e->ip, e->code, e->msg); + return ret; +} + +void perf_session__auxtrace_error_inc(struct perf_session *session, + union perf_event *event) +{ + struct auxtrace_error_event *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_tool *tool __maybe_unused, + union perf_event *event, + struct perf_session *session) +{ + if (auxtrace__dont_decode(session)) + return 0; + + perf_event__fprintf_auxtrace_error(event, stdout); + return 0; +} + +static int __auxtrace_mmap__read(struct auxtrace_mmap *mm, + struct auxtrace_record *itr, + struct perf_tool *tool, process_auxtrace_t fn, + bool snapshot, size_t snapshot_size) +{ + 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, &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 auxtrace_mmap *mm, struct auxtrace_record *itr, + struct perf_tool *tool, process_auxtrace_t fn) +{ + return __auxtrace_mmap__read(mm, itr, tool, fn, false, 0); +} + +int auxtrace_mmap__read_snapshot(struct auxtrace_mmap *mm, + struct auxtrace_record *itr, + struct perf_tool *tool, process_auxtrace_t fn, + size_t snapshot_size) +{ + return __auxtrace_mmap__read(mm, 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); + free(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; +} + +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) +{ + free(filt->str); + filt->action = NULL; + filt->sym_from = NULL; + filt->sym_to = NULL; + filt->filename = NULL; + filt->str = 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; + + map__load(map); + + 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) +{ + struct symbol *first_sym = dso__first_symbol(dso); + struct symbol *last_sym = dso__last_symbol(dso); + + if (!first_sym || !last_sym) { + pr_err("Failed to determine filter for %s\nNo symbols found.\n", + filt->filename); + return -EINVAL; + } + + filt->addr = first_sym->start; + filt->size = last_sym->end - first_sym->start; + + 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 perf_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 (perf_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 struct perf_pmu *perf_evsel__find_pmu(struct perf_evsel *evsel) +{ + struct perf_pmu *pmu = NULL; + + while ((pmu = perf_pmu__scan(pmu)) != NULL) { + if (pmu->type == evsel->attr.type) + break; + } + + return pmu; +} + +static int perf_evsel__nr_addr_filter(struct perf_evsel *evsel) +{ + struct perf_pmu *pmu = perf_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 perf_evlist *evlist) +{ + struct perf_evsel *evsel; + char *filter; + int err, max_nr; + + evlist__for_each_entry(evlist, evsel) { + filter = evsel->filter; + max_nr = perf_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; +} |