| #define _FILE_OFFSET_BITS 64 |
| |
| #include <linux/kernel.h> |
| |
| #include <byteswap.h> |
| #include <unistd.h> |
| #include <sys/types.h> |
| |
| #include "session.h" |
| #include "sort.h" |
| #include "util.h" |
| |
| static int perf_session__open(struct perf_session *self, bool force) |
| { |
| struct stat input_stat; |
| |
| if (!strcmp(self->filename, "-")) { |
| self->fd_pipe = true; |
| self->fd = STDIN_FILENO; |
| |
| if (perf_header__read(self, self->fd) < 0) |
| pr_err("incompatible file format"); |
| |
| return 0; |
| } |
| |
| self->fd = open(self->filename, O_RDONLY); |
| if (self->fd < 0) { |
| pr_err("failed to open file: %s", self->filename); |
| if (!strcmp(self->filename, "perf.data")) |
| pr_err(" (try 'perf record' first)"); |
| pr_err("\n"); |
| return -errno; |
| } |
| |
| if (fstat(self->fd, &input_stat) < 0) |
| goto out_close; |
| |
| if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) { |
| pr_err("file %s not owned by current user or root\n", |
| self->filename); |
| goto out_close; |
| } |
| |
| if (!input_stat.st_size) { |
| pr_info("zero-sized file (%s), nothing to do!\n", |
| self->filename); |
| goto out_close; |
| } |
| |
| if (perf_header__read(self, self->fd) < 0) { |
| pr_err("incompatible file format"); |
| goto out_close; |
| } |
| |
| self->size = input_stat.st_size; |
| return 0; |
| |
| out_close: |
| close(self->fd); |
| self->fd = -1; |
| return -1; |
| } |
| |
| void perf_session__update_sample_type(struct perf_session *self) |
| { |
| self->sample_type = perf_header__sample_type(&self->header); |
| } |
| |
| int perf_session__create_kernel_maps(struct perf_session *self) |
| { |
| struct rb_root *machines = &self->machines; |
| int ret = machines__create_kernel_maps(machines, HOST_KERNEL_ID); |
| |
| if (ret >= 0) |
| ret = machines__create_guest_kernel_maps(machines); |
| return ret; |
| } |
| |
| struct perf_session *perf_session__new(const char *filename, int mode, bool force, bool repipe) |
| { |
| size_t len = filename ? strlen(filename) + 1 : 0; |
| struct perf_session *self = zalloc(sizeof(*self) + len); |
| |
| if (self == NULL) |
| goto out; |
| |
| if (perf_header__init(&self->header) < 0) |
| goto out_free; |
| |
| memcpy(self->filename, filename, len); |
| self->threads = RB_ROOT; |
| self->stats_by_id = RB_ROOT; |
| self->last_match = NULL; |
| self->mmap_window = 32; |
| self->cwd = NULL; |
| self->cwdlen = 0; |
| self->unknown_events = 0; |
| self->machines = RB_ROOT; |
| self->repipe = repipe; |
| INIT_LIST_HEAD(&self->ordered_samples.samples_head); |
| |
| if (mode == O_RDONLY) { |
| if (perf_session__open(self, force) < 0) |
| goto out_delete; |
| } else if (mode == O_WRONLY) { |
| /* |
| * In O_RDONLY mode this will be performed when reading the |
| * kernel MMAP event, in event__process_mmap(). |
| */ |
| if (perf_session__create_kernel_maps(self) < 0) |
| goto out_delete; |
| } |
| |
| perf_session__update_sample_type(self); |
| out: |
| return self; |
| out_free: |
| free(self); |
| return NULL; |
| out_delete: |
| perf_session__delete(self); |
| return NULL; |
| } |
| |
| void perf_session__delete(struct perf_session *self) |
| { |
| perf_header__exit(&self->header); |
| close(self->fd); |
| free(self->cwd); |
| free(self); |
| } |
| |
| static bool symbol__match_parent_regex(struct symbol *sym) |
| { |
| if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0)) |
| return 1; |
| |
| return 0; |
| } |
| |
| struct map_symbol *perf_session__resolve_callchain(struct perf_session *self, |
| struct thread *thread, |
| struct ip_callchain *chain, |
| struct symbol **parent) |
| { |
| u8 cpumode = PERF_RECORD_MISC_USER; |
| unsigned int i; |
| struct map_symbol *syms = calloc(chain->nr, sizeof(*syms)); |
| |
| if (!syms) |
| return NULL; |
| |
| for (i = 0; i < chain->nr; i++) { |
| u64 ip = chain->ips[i]; |
| struct addr_location al; |
| |
| if (ip >= PERF_CONTEXT_MAX) { |
| switch (ip) { |
| case PERF_CONTEXT_HV: |
| cpumode = PERF_RECORD_MISC_HYPERVISOR; break; |
| case PERF_CONTEXT_KERNEL: |
| cpumode = PERF_RECORD_MISC_KERNEL; break; |
| case PERF_CONTEXT_USER: |
| cpumode = PERF_RECORD_MISC_USER; break; |
| default: |
| break; |
| } |
| continue; |
| } |
| |
| al.filtered = false; |
| thread__find_addr_location(thread, self, cpumode, |
| MAP__FUNCTION, thread->pid, ip, &al, NULL); |
| if (al.sym != NULL) { |
| if (sort__has_parent && !*parent && |
| symbol__match_parent_regex(al.sym)) |
| *parent = al.sym; |
| if (!symbol_conf.use_callchain) |
| break; |
| syms[i].map = al.map; |
| syms[i].sym = al.sym; |
| } |
| } |
| |
| return syms; |
| } |
| |
| static int process_event_stub(event_t *event __used, |
| struct perf_session *session __used) |
| { |
| dump_printf(": unhandled!\n"); |
| return 0; |
| } |
| |
| static int process_finished_round_stub(event_t *event __used, |
| struct perf_session *session __used, |
| struct perf_event_ops *ops __used) |
| { |
| dump_printf(": unhandled!\n"); |
| return 0; |
| } |
| |
| static int process_finished_round(event_t *event, |
| struct perf_session *session, |
| struct perf_event_ops *ops); |
| |
| static void perf_event_ops__fill_defaults(struct perf_event_ops *handler) |
| { |
| if (handler->sample == NULL) |
| handler->sample = process_event_stub; |
| if (handler->mmap == NULL) |
| handler->mmap = process_event_stub; |
| if (handler->comm == NULL) |
| handler->comm = process_event_stub; |
| if (handler->fork == NULL) |
| handler->fork = process_event_stub; |
| if (handler->exit == NULL) |
| handler->exit = process_event_stub; |
| if (handler->lost == NULL) |
| handler->lost = process_event_stub; |
| if (handler->read == NULL) |
| handler->read = process_event_stub; |
| if (handler->throttle == NULL) |
| handler->throttle = process_event_stub; |
| if (handler->unthrottle == NULL) |
| handler->unthrottle = process_event_stub; |
| if (handler->attr == NULL) |
| handler->attr = process_event_stub; |
| if (handler->event_type == NULL) |
| handler->event_type = process_event_stub; |
| if (handler->tracing_data == NULL) |
| handler->tracing_data = process_event_stub; |
| if (handler->build_id == NULL) |
| handler->build_id = process_event_stub; |
| if (handler->finished_round == NULL) { |
| if (handler->ordered_samples) |
| handler->finished_round = process_finished_round; |
| else |
| handler->finished_round = process_finished_round_stub; |
| } |
| } |
| |
| static const char *event__name[] = { |
| [0] = "TOTAL", |
| [PERF_RECORD_MMAP] = "MMAP", |
| [PERF_RECORD_LOST] = "LOST", |
| [PERF_RECORD_COMM] = "COMM", |
| [PERF_RECORD_EXIT] = "EXIT", |
| [PERF_RECORD_THROTTLE] = "THROTTLE", |
| [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE", |
| [PERF_RECORD_FORK] = "FORK", |
| [PERF_RECORD_READ] = "READ", |
| [PERF_RECORD_SAMPLE] = "SAMPLE", |
| [PERF_RECORD_HEADER_ATTR] = "ATTR", |
| [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE", |
| [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA", |
| [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID", |
| }; |
| |
| unsigned long event__total[PERF_RECORD_HEADER_MAX]; |
| |
| void event__print_totals(void) |
| { |
| int i; |
| for (i = 0; i < PERF_RECORD_HEADER_MAX; ++i) { |
| if (!event__name[i]) |
| continue; |
| pr_info("%10s events: %10ld\n", |
| event__name[i], event__total[i]); |
| } |
| } |
| |
| void mem_bswap_64(void *src, int byte_size) |
| { |
| u64 *m = src; |
| |
| while (byte_size > 0) { |
| *m = bswap_64(*m); |
| byte_size -= sizeof(u64); |
| ++m; |
| } |
| } |
| |
| static void event__all64_swap(event_t *self) |
| { |
| struct perf_event_header *hdr = &self->header; |
| mem_bswap_64(hdr + 1, self->header.size - sizeof(*hdr)); |
| } |
| |
| static void event__comm_swap(event_t *self) |
| { |
| self->comm.pid = bswap_32(self->comm.pid); |
| self->comm.tid = bswap_32(self->comm.tid); |
| } |
| |
| static void event__mmap_swap(event_t *self) |
| { |
| self->mmap.pid = bswap_32(self->mmap.pid); |
| self->mmap.tid = bswap_32(self->mmap.tid); |
| self->mmap.start = bswap_64(self->mmap.start); |
| self->mmap.len = bswap_64(self->mmap.len); |
| self->mmap.pgoff = bswap_64(self->mmap.pgoff); |
| } |
| |
| static void event__task_swap(event_t *self) |
| { |
| self->fork.pid = bswap_32(self->fork.pid); |
| self->fork.tid = bswap_32(self->fork.tid); |
| self->fork.ppid = bswap_32(self->fork.ppid); |
| self->fork.ptid = bswap_32(self->fork.ptid); |
| self->fork.time = bswap_64(self->fork.time); |
| } |
| |
| static void event__read_swap(event_t *self) |
| { |
| self->read.pid = bswap_32(self->read.pid); |
| self->read.tid = bswap_32(self->read.tid); |
| self->read.value = bswap_64(self->read.value); |
| self->read.time_enabled = bswap_64(self->read.time_enabled); |
| self->read.time_running = bswap_64(self->read.time_running); |
| self->read.id = bswap_64(self->read.id); |
| } |
| |
| static void event__attr_swap(event_t *self) |
| { |
| size_t size; |
| |
| self->attr.attr.type = bswap_32(self->attr.attr.type); |
| self->attr.attr.size = bswap_32(self->attr.attr.size); |
| self->attr.attr.config = bswap_64(self->attr.attr.config); |
| self->attr.attr.sample_period = bswap_64(self->attr.attr.sample_period); |
| self->attr.attr.sample_type = bswap_64(self->attr.attr.sample_type); |
| self->attr.attr.read_format = bswap_64(self->attr.attr.read_format); |
| self->attr.attr.wakeup_events = bswap_32(self->attr.attr.wakeup_events); |
| self->attr.attr.bp_type = bswap_32(self->attr.attr.bp_type); |
| self->attr.attr.bp_addr = bswap_64(self->attr.attr.bp_addr); |
| self->attr.attr.bp_len = bswap_64(self->attr.attr.bp_len); |
| |
| size = self->header.size; |
| size -= (void *)&self->attr.id - (void *)self; |
| mem_bswap_64(self->attr.id, size); |
| } |
| |
| static void event__event_type_swap(event_t *self) |
| { |
| self->event_type.event_type.event_id = |
| bswap_64(self->event_type.event_type.event_id); |
| } |
| |
| static void event__tracing_data_swap(event_t *self) |
| { |
| self->tracing_data.size = bswap_32(self->tracing_data.size); |
| } |
| |
| typedef void (*event__swap_op)(event_t *self); |
| |
| static event__swap_op event__swap_ops[] = { |
| [PERF_RECORD_MMAP] = event__mmap_swap, |
| [PERF_RECORD_COMM] = event__comm_swap, |
| [PERF_RECORD_FORK] = event__task_swap, |
| [PERF_RECORD_EXIT] = event__task_swap, |
| [PERF_RECORD_LOST] = event__all64_swap, |
| [PERF_RECORD_READ] = event__read_swap, |
| [PERF_RECORD_SAMPLE] = event__all64_swap, |
| [PERF_RECORD_HEADER_ATTR] = event__attr_swap, |
| [PERF_RECORD_HEADER_EVENT_TYPE] = event__event_type_swap, |
| [PERF_RECORD_HEADER_TRACING_DATA] = event__tracing_data_swap, |
| [PERF_RECORD_HEADER_BUILD_ID] = NULL, |
| [PERF_RECORD_HEADER_MAX] = NULL, |
| }; |
| |
| struct sample_queue { |
| u64 timestamp; |
| struct sample_event *event; |
| struct list_head list; |
| }; |
| |
| static void flush_sample_queue(struct perf_session *s, |
| struct perf_event_ops *ops) |
| { |
| struct list_head *head = &s->ordered_samples.samples_head; |
| u64 limit = s->ordered_samples.next_flush; |
| struct sample_queue *tmp, *iter; |
| |
| if (!ops->ordered_samples || !limit) |
| return; |
| |
| list_for_each_entry_safe(iter, tmp, head, list) { |
| if (iter->timestamp > limit) |
| return; |
| |
| if (iter == s->ordered_samples.last_inserted) |
| s->ordered_samples.last_inserted = NULL; |
| |
| ops->sample((event_t *)iter->event, s); |
| |
| s->ordered_samples.last_flush = iter->timestamp; |
| list_del(&iter->list); |
| free(iter->event); |
| free(iter); |
| } |
| } |
| |
| /* |
| * When perf record finishes a pass on every buffers, it records this pseudo |
| * event. |
| * We record the max timestamp t found in the pass n. |
| * Assuming these timestamps are monotonic across cpus, we know that if |
| * a buffer still has events with timestamps below t, they will be all |
| * available and then read in the pass n + 1. |
| * Hence when we start to read the pass n + 2, we can safely flush every |
| * events with timestamps below t. |
| * |
| * ============ PASS n ================= |
| * CPU 0 | CPU 1 |
| * | |
| * cnt1 timestamps | cnt2 timestamps |
| * 1 | 2 |
| * 2 | 3 |
| * - | 4 <--- max recorded |
| * |
| * ============ PASS n + 1 ============== |
| * CPU 0 | CPU 1 |
| * | |
| * cnt1 timestamps | cnt2 timestamps |
| * 3 | 5 |
| * 4 | 6 |
| * 5 | 7 <---- max recorded |
| * |
| * Flush every events below timestamp 4 |
| * |
| * ============ PASS n + 2 ============== |
| * CPU 0 | CPU 1 |
| * | |
| * cnt1 timestamps | cnt2 timestamps |
| * 6 | 8 |
| * 7 | 9 |
| * - | 10 |
| * |
| * Flush every events below timestamp 7 |
| * etc... |
| */ |
| static int process_finished_round(event_t *event __used, |
| struct perf_session *session, |
| struct perf_event_ops *ops) |
| { |
| flush_sample_queue(session, ops); |
| session->ordered_samples.next_flush = session->ordered_samples.max_timestamp; |
| |
| return 0; |
| } |
| |
| static void __queue_sample_end(struct sample_queue *new, struct list_head *head) |
| { |
| struct sample_queue *iter; |
| |
| list_for_each_entry_reverse(iter, head, list) { |
| if (iter->timestamp < new->timestamp) { |
| list_add(&new->list, &iter->list); |
| return; |
| } |
| } |
| |
| list_add(&new->list, head); |
| } |
| |
| static void __queue_sample_before(struct sample_queue *new, |
| struct sample_queue *iter, |
| struct list_head *head) |
| { |
| list_for_each_entry_continue_reverse(iter, head, list) { |
| if (iter->timestamp < new->timestamp) { |
| list_add(&new->list, &iter->list); |
| return; |
| } |
| } |
| |
| list_add(&new->list, head); |
| } |
| |
| static void __queue_sample_after(struct sample_queue *new, |
| struct sample_queue *iter, |
| struct list_head *head) |
| { |
| list_for_each_entry_continue(iter, head, list) { |
| if (iter->timestamp > new->timestamp) { |
| list_add_tail(&new->list, &iter->list); |
| return; |
| } |
| } |
| list_add_tail(&new->list, head); |
| } |
| |
| /* The queue is ordered by time */ |
| static void __queue_sample_event(struct sample_queue *new, |
| struct perf_session *s) |
| { |
| struct sample_queue *last_inserted = s->ordered_samples.last_inserted; |
| struct list_head *head = &s->ordered_samples.samples_head; |
| |
| |
| if (!last_inserted) { |
| __queue_sample_end(new, head); |
| return; |
| } |
| |
| /* |
| * Most of the time the current event has a timestamp |
| * very close to the last event inserted, unless we just switched |
| * to another event buffer. Having a sorting based on a list and |
| * on the last inserted event that is close to the current one is |
| * probably more efficient than an rbtree based sorting. |
| */ |
| if (last_inserted->timestamp >= new->timestamp) |
| __queue_sample_before(new, last_inserted, head); |
| else |
| __queue_sample_after(new, last_inserted, head); |
| } |
| |
| static int queue_sample_event(event_t *event, struct sample_data *data, |
| struct perf_session *s) |
| { |
| u64 timestamp = data->time; |
| struct sample_queue *new; |
| |
| |
| if (timestamp < s->ordered_samples.last_flush) { |
| printf("Warning: Timestamp below last timeslice flush\n"); |
| return -EINVAL; |
| } |
| |
| new = malloc(sizeof(*new)); |
| if (!new) |
| return -ENOMEM; |
| |
| new->timestamp = timestamp; |
| |
| new->event = malloc(event->header.size); |
| if (!new->event) { |
| free(new); |
| return -ENOMEM; |
| } |
| |
| memcpy(new->event, event, event->header.size); |
| |
| __queue_sample_event(new, s); |
| s->ordered_samples.last_inserted = new; |
| |
| if (new->timestamp > s->ordered_samples.max_timestamp) |
| s->ordered_samples.max_timestamp = new->timestamp; |
| |
| return 0; |
| } |
| |
| static int perf_session__process_sample(event_t *event, struct perf_session *s, |
| struct perf_event_ops *ops) |
| { |
| struct sample_data data; |
| |
| if (!ops->ordered_samples) |
| return ops->sample(event, s); |
| |
| bzero(&data, sizeof(struct sample_data)); |
| event__parse_sample(event, s->sample_type, &data); |
| |
| queue_sample_event(event, &data, s); |
| |
| return 0; |
| } |
| |
| static int perf_session__process_event(struct perf_session *self, |
| event_t *event, |
| struct perf_event_ops *ops, |
| u64 offset, u64 head) |
| { |
| trace_event(event); |
| |
| if (event->header.type < PERF_RECORD_HEADER_MAX) { |
| dump_printf("%#Lx [%#x]: PERF_RECORD_%s", |
| offset + head, event->header.size, |
| event__name[event->header.type]); |
| ++event__total[0]; |
| ++event__total[event->header.type]; |
| } |
| |
| if (self->header.needs_swap && event__swap_ops[event->header.type]) |
| event__swap_ops[event->header.type](event); |
| |
| switch (event->header.type) { |
| case PERF_RECORD_SAMPLE: |
| return perf_session__process_sample(event, self, ops); |
| case PERF_RECORD_MMAP: |
| return ops->mmap(event, self); |
| case PERF_RECORD_COMM: |
| return ops->comm(event, self); |
| case PERF_RECORD_FORK: |
| return ops->fork(event, self); |
| case PERF_RECORD_EXIT: |
| return ops->exit(event, self); |
| case PERF_RECORD_LOST: |
| return ops->lost(event, self); |
| case PERF_RECORD_READ: |
| return ops->read(event, self); |
| case PERF_RECORD_THROTTLE: |
| return ops->throttle(event, self); |
| case PERF_RECORD_UNTHROTTLE: |
| return ops->unthrottle(event, self); |
| case PERF_RECORD_HEADER_ATTR: |
| return ops->attr(event, self); |
| case PERF_RECORD_HEADER_EVENT_TYPE: |
| return ops->event_type(event, self); |
| case PERF_RECORD_HEADER_TRACING_DATA: |
| /* setup for reading amidst mmap */ |
| lseek(self->fd, offset + head, SEEK_SET); |
| return ops->tracing_data(event, self); |
| case PERF_RECORD_HEADER_BUILD_ID: |
| return ops->build_id(event, self); |
| case PERF_RECORD_FINISHED_ROUND: |
| return ops->finished_round(event, self, ops); |
| default: |
| self->unknown_events++; |
| return -1; |
| } |
| } |
| |
| void perf_event_header__bswap(struct perf_event_header *self) |
| { |
| self->type = bswap_32(self->type); |
| self->misc = bswap_16(self->misc); |
| self->size = bswap_16(self->size); |
| } |
| |
| static struct thread *perf_session__register_idle_thread(struct perf_session *self) |
| { |
| struct thread *thread = perf_session__findnew(self, 0); |
| |
| if (thread == NULL || thread__set_comm(thread, "swapper")) { |
| pr_err("problem inserting idle task.\n"); |
| thread = NULL; |
| } |
| |
| return thread; |
| } |
| |
| int do_read(int fd, void *buf, size_t size) |
| { |
| void *buf_start = buf; |
| |
| while (size) { |
| int ret = read(fd, buf, size); |
| |
| if (ret <= 0) |
| return ret; |
| |
| size -= ret; |
| buf += ret; |
| } |
| |
| return buf - buf_start; |
| } |
| |
| #define session_done() (*(volatile int *)(&session_done)) |
| volatile int session_done; |
| |
| static int __perf_session__process_pipe_events(struct perf_session *self, |
| struct perf_event_ops *ops) |
| { |
| event_t event; |
| uint32_t size; |
| int skip = 0; |
| u64 head; |
| int err; |
| void *p; |
| |
| perf_event_ops__fill_defaults(ops); |
| |
| head = 0; |
| more: |
| err = do_read(self->fd, &event, sizeof(struct perf_event_header)); |
| if (err <= 0) { |
| if (err == 0) |
| goto done; |
| |
| pr_err("failed to read event header\n"); |
| goto out_err; |
| } |
| |
| if (self->header.needs_swap) |
| perf_event_header__bswap(&event.header); |
| |
| size = event.header.size; |
| if (size == 0) |
| size = 8; |
| |
| p = &event; |
| p += sizeof(struct perf_event_header); |
| |
| if (size - sizeof(struct perf_event_header)) { |
| err = do_read(self->fd, p, |
| size - sizeof(struct perf_event_header)); |
| if (err <= 0) { |
| if (err == 0) { |
| pr_err("unexpected end of event stream\n"); |
| goto done; |
| } |
| |
| pr_err("failed to read event data\n"); |
| goto out_err; |
| } |
| } |
| |
| if (size == 0 || |
| (skip = perf_session__process_event(self, &event, ops, |
| 0, head)) < 0) { |
| dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n", |
| head, event.header.size, event.header.type); |
| /* |
| * assume we lost track of the stream, check alignment, and |
| * increment a single u64 in the hope to catch on again 'soon'. |
| */ |
| if (unlikely(head & 7)) |
| head &= ~7ULL; |
| |
| size = 8; |
| } |
| |
| head += size; |
| |
| dump_printf("\n%#Lx [%#x]: event: %d\n", |
| head, event.header.size, event.header.type); |
| |
| if (skip > 0) |
| head += skip; |
| |
| if (!session_done()) |
| goto more; |
| done: |
| err = 0; |
| out_err: |
| return err; |
| } |
| |
| int __perf_session__process_events(struct perf_session *self, |
| u64 data_offset, u64 data_size, |
| u64 file_size, struct perf_event_ops *ops) |
| { |
| int err, mmap_prot, mmap_flags; |
| u64 head, shift; |
| u64 offset = 0; |
| size_t page_size; |
| event_t *event; |
| uint32_t size; |
| char *buf; |
| struct ui_progress *progress = ui_progress__new("Processing events...", |
| self->size); |
| if (progress == NULL) |
| return -1; |
| |
| perf_event_ops__fill_defaults(ops); |
| |
| page_size = sysconf(_SC_PAGESIZE); |
| |
| head = data_offset; |
| shift = page_size * (head / page_size); |
| offset += shift; |
| head -= shift; |
| |
| mmap_prot = PROT_READ; |
| mmap_flags = MAP_SHARED; |
| |
| if (self->header.needs_swap) { |
| mmap_prot |= PROT_WRITE; |
| mmap_flags = MAP_PRIVATE; |
| } |
| remap: |
| buf = mmap(NULL, page_size * self->mmap_window, mmap_prot, |
| mmap_flags, self->fd, offset); |
| if (buf == MAP_FAILED) { |
| pr_err("failed to mmap file\n"); |
| err = -errno; |
| goto out_err; |
| } |
| |
| more: |
| event = (event_t *)(buf + head); |
| ui_progress__update(progress, offset); |
| |
| if (self->header.needs_swap) |
| perf_event_header__bswap(&event->header); |
| size = event->header.size; |
| if (size == 0) |
| size = 8; |
| |
| if (head + event->header.size >= page_size * self->mmap_window) { |
| int munmap_ret; |
| |
| shift = page_size * (head / page_size); |
| |
| munmap_ret = munmap(buf, page_size * self->mmap_window); |
| assert(munmap_ret == 0); |
| |
| offset += shift; |
| head -= shift; |
| goto remap; |
| } |
| |
| size = event->header.size; |
| |
| dump_printf("\n%#Lx [%#x]: event: %d\n", |
| offset + head, event->header.size, event->header.type); |
| |
| if (size == 0 || |
| perf_session__process_event(self, event, ops, offset, head) < 0) { |
| dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n", |
| offset + head, event->header.size, |
| event->header.type); |
| /* |
| * assume we lost track of the stream, check alignment, and |
| * increment a single u64 in the hope to catch on again 'soon'. |
| */ |
| if (unlikely(head & 7)) |
| head &= ~7ULL; |
| |
| size = 8; |
| } |
| |
| head += size; |
| |
| if (offset + head >= data_offset + data_size) |
| goto done; |
| |
| if (offset + head < file_size) |
| goto more; |
| done: |
| err = 0; |
| /* do the final flush for ordered samples */ |
| self->ordered_samples.next_flush = ULLONG_MAX; |
| flush_sample_queue(self, ops); |
| out_err: |
| ui_progress__delete(progress); |
| return err; |
| } |
| |
| int perf_session__process_events(struct perf_session *self, |
| struct perf_event_ops *ops) |
| { |
| int err; |
| |
| if (perf_session__register_idle_thread(self) == NULL) |
| return -ENOMEM; |
| |
| if (!symbol_conf.full_paths) { |
| char bf[PATH_MAX]; |
| |
| if (getcwd(bf, sizeof(bf)) == NULL) { |
| err = -errno; |
| out_getcwd_err: |
| pr_err("failed to get the current directory\n"); |
| goto out_err; |
| } |
| self->cwd = strdup(bf); |
| if (self->cwd == NULL) { |
| err = -ENOMEM; |
| goto out_getcwd_err; |
| } |
| self->cwdlen = strlen(self->cwd); |
| } |
| |
| if (!self->fd_pipe) |
| err = __perf_session__process_events(self, |
| self->header.data_offset, |
| self->header.data_size, |
| self->size, ops); |
| else |
| err = __perf_session__process_pipe_events(self, ops); |
| out_err: |
| return err; |
| } |
| |
| bool perf_session__has_traces(struct perf_session *self, const char *msg) |
| { |
| if (!(self->sample_type & PERF_SAMPLE_RAW)) { |
| pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| int perf_session__set_kallsyms_ref_reloc_sym(struct map **maps, |
| const char *symbol_name, |
| u64 addr) |
| { |
| char *bracket; |
| enum map_type i; |
| struct ref_reloc_sym *ref; |
| |
| ref = zalloc(sizeof(struct ref_reloc_sym)); |
| if (ref == NULL) |
| return -ENOMEM; |
| |
| ref->name = strdup(symbol_name); |
| if (ref->name == NULL) { |
| free(ref); |
| return -ENOMEM; |
| } |
| |
| bracket = strchr(ref->name, ']'); |
| if (bracket) |
| *bracket = '\0'; |
| |
| ref->addr = addr; |
| |
| for (i = 0; i < MAP__NR_TYPES; ++i) { |
| struct kmap *kmap = map__kmap(maps[i]); |
| kmap->ref_reloc_sym = ref; |
| } |
| |
| return 0; |
| } |