#include "symbol.h" #include "util.h" #include "debug.h" #include "thread.h" #include "session.h" static int process_event_stub(event_t *event __used, struct perf_session *session __used) { dump_printf(": unhandled!\n"); return 0; } static void perf_event_ops__fill_defaults(struct perf_event_ops *handler) { if (!handler->process_sample_event) handler->process_sample_event = process_event_stub; if (!handler->process_mmap_event) handler->process_mmap_event = process_event_stub; if (!handler->process_comm_event) handler->process_comm_event = process_event_stub; if (!handler->process_fork_event) handler->process_fork_event = process_event_stub; if (!handler->process_exit_event) handler->process_exit_event = process_event_stub; if (!handler->process_lost_event) handler->process_lost_event = process_event_stub; if (!handler->process_read_event) handler->process_read_event = process_event_stub; if (!handler->process_throttle_event) handler->process_throttle_event = process_event_stub; if (!handler->process_unthrottle_event) handler->process_unthrottle_event = process_event_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", }; unsigned long event__total[PERF_RECORD_MAX]; void event__print_totals(void) { int i; for (i = 0; i < PERF_RECORD_MAX; ++i) pr_info("%10s events: %10ld\n", event__name[i], event__total[i]); } static int process_event(event_t *event, struct perf_session *session, struct perf_event_ops *ops, unsigned long offset, unsigned long head) { trace_event(event); if (event->header.type < PERF_RECORD_MAX) { dump_printf("%p [%p]: PERF_RECORD_%s", (void *)(offset + head), (void *)(long)(event->header.size), event__name[event->header.type]); ++event__total[0]; ++event__total[event->header.type]; } switch (event->header.type) { case PERF_RECORD_SAMPLE: return ops->process_sample_event(event, session); case PERF_RECORD_MMAP: return ops->process_mmap_event(event, session); case PERF_RECORD_COMM: return ops->process_comm_event(event, session); case PERF_RECORD_FORK: return ops->process_fork_event(event, session); case PERF_RECORD_EXIT: return ops->process_exit_event(event, session); case PERF_RECORD_LOST: return ops->process_lost_event(event, session); case PERF_RECORD_READ: return ops->process_read_event(event, session); case PERF_RECORD_THROTTLE: return ops->process_throttle_event(event, session); case PERF_RECORD_UNTHROTTLE: return ops->process_unthrottle_event(event, session); default: ops->total_unknown++; return -1; } } int perf_header__read_build_ids(int input, u64 offset, u64 size) { struct build_id_event bev; char filename[PATH_MAX]; u64 limit = offset + size; int err = -1; while (offset < limit) { struct dso *dso; ssize_t len; if (read(input, &bev, sizeof(bev)) != sizeof(bev)) goto out; len = bev.header.size - sizeof(bev); if (read(input, filename, len) != len) goto out; dso = dsos__findnew(filename); if (dso != NULL) dso__set_build_id(dso, &bev.build_id); offset += bev.header.size; } err = 0; out: return err; } static struct thread *perf_session__register_idle_thread(struct perf_session *self) { struct thread *thread = perf_session__findnew(self, 0); if (!thread || thread__set_comm(thread, "swapper")) { pr_err("problem inserting idle task.\n"); thread = NULL; } return thread; } int perf_session__process_events(struct perf_session *self, struct perf_event_ops *ops) { int err; unsigned long head, shift; unsigned long offset = 0; size_t page_size; u64 sample_type; event_t *event; uint32_t size; char *buf; if (perf_session__register_idle_thread(self) == NULL) return -ENOMEM; perf_event_ops__fill_defaults(ops); page_size = getpagesize(); head = self->header.data_offset; sample_type = perf_header__sample_type(&self->header); err = -EINVAL; if (ops->sample_type_check && ops->sample_type_check(sample_type, self) < 0) goto out_err; if (!ops->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); } shift = page_size * (head / page_size); offset += shift; head -= shift; remap: buf = mmap(NULL, page_size * self->mmap_window, PROT_READ, MAP_SHARED, 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); size = event->header.size; if (!size) 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%p [%p]: event: %d\n", (void *)(offset + head), (void *)(long)event->header.size, event->header.type); if (!size || process_event(event, self, ops, offset, head) < 0) { dump_printf("%p [%p]: skipping unknown header type: %d\n", (void *)(offset + head), (void *)(long)(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 >= self->header.data_offset + self->header.data_size) goto done; if (offset + head < self->size) goto more; done: err = 0; out_err: return err; }