1 #define _FILE_OFFSET_BITS 64 2 3 #include <linux/kernel.h> 4 5 #include <byteswap.h> 6 #include <unistd.h> 7 #include <sys/types.h> 8 #include <sys/mman.h> 9 10 #include "evlist.h" 11 #include "evsel.h" 12 #include "session.h" 13 #include "tool.h" 14 #include "sort.h" 15 #include "util.h" 16 #include "cpumap.h" 17 #include "event-parse.h" 18 #include "perf_regs.h" 19 #include "vdso.h" 20 21 static int perf_session__open(struct perf_session *self, bool force) 22 { 23 struct stat input_stat; 24 25 if (!strcmp(self->filename, "-")) { 26 self->fd_pipe = true; 27 self->fd = STDIN_FILENO; 28 29 if (perf_session__read_header(self, self->fd) < 0) 30 pr_err("incompatible file format (rerun with -v to learn more)"); 31 32 return 0; 33 } 34 35 self->fd = open(self->filename, O_RDONLY); 36 if (self->fd < 0) { 37 int err = errno; 38 39 pr_err("failed to open %s: %s", self->filename, strerror(err)); 40 if (err == ENOENT && !strcmp(self->filename, "perf.data")) 41 pr_err(" (try 'perf record' first)"); 42 pr_err("\n"); 43 return -errno; 44 } 45 46 if (fstat(self->fd, &input_stat) < 0) 47 goto out_close; 48 49 if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) { 50 pr_err("file %s not owned by current user or root\n", 51 self->filename); 52 goto out_close; 53 } 54 55 if (!input_stat.st_size) { 56 pr_info("zero-sized file (%s), nothing to do!\n", 57 self->filename); 58 goto out_close; 59 } 60 61 if (perf_session__read_header(self, self->fd) < 0) { 62 pr_err("incompatible file format (rerun with -v to learn more)"); 63 goto out_close; 64 } 65 66 if (!perf_evlist__valid_sample_type(self->evlist)) { 67 pr_err("non matching sample_type"); 68 goto out_close; 69 } 70 71 if (!perf_evlist__valid_sample_id_all(self->evlist)) { 72 pr_err("non matching sample_id_all"); 73 goto out_close; 74 } 75 76 self->size = input_stat.st_size; 77 return 0; 78 79 out_close: 80 close(self->fd); 81 self->fd = -1; 82 return -1; 83 } 84 85 void perf_session__set_id_hdr_size(struct perf_session *session) 86 { 87 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist); 88 89 session->host_machine.id_hdr_size = id_hdr_size; 90 machines__set_id_hdr_size(&session->machines, id_hdr_size); 91 } 92 93 int perf_session__create_kernel_maps(struct perf_session *self) 94 { 95 int ret = machine__create_kernel_maps(&self->host_machine); 96 97 if (ret >= 0) 98 ret = machines__create_guest_kernel_maps(&self->machines); 99 return ret; 100 } 101 102 static void perf_session__destroy_kernel_maps(struct perf_session *self) 103 { 104 machine__destroy_kernel_maps(&self->host_machine); 105 machines__destroy_guest_kernel_maps(&self->machines); 106 } 107 108 struct perf_session *perf_session__new(const char *filename, int mode, 109 bool force, bool repipe, 110 struct perf_tool *tool) 111 { 112 struct perf_session *self; 113 struct stat st; 114 size_t len; 115 116 if (!filename || !strlen(filename)) { 117 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode)) 118 filename = "-"; 119 else 120 filename = "perf.data"; 121 } 122 123 len = strlen(filename); 124 self = zalloc(sizeof(*self) + len); 125 126 if (self == NULL) 127 goto out; 128 129 memcpy(self->filename, filename, len); 130 self->machines = RB_ROOT; 131 self->repipe = repipe; 132 INIT_LIST_HEAD(&self->ordered_samples.samples); 133 INIT_LIST_HEAD(&self->ordered_samples.sample_cache); 134 INIT_LIST_HEAD(&self->ordered_samples.to_free); 135 machine__init(&self->host_machine, "", HOST_KERNEL_ID); 136 hists__init(&self->hists); 137 138 if (mode == O_RDONLY) { 139 if (perf_session__open(self, force) < 0) 140 goto out_delete; 141 perf_session__set_id_hdr_size(self); 142 } else if (mode == O_WRONLY) { 143 /* 144 * In O_RDONLY mode this will be performed when reading the 145 * kernel MMAP event, in perf_event__process_mmap(). 146 */ 147 if (perf_session__create_kernel_maps(self) < 0) 148 goto out_delete; 149 } 150 151 if (tool && tool->ordering_requires_timestamps && 152 tool->ordered_samples && !perf_evlist__sample_id_all(self->evlist)) { 153 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); 154 tool->ordered_samples = false; 155 } 156 157 out: 158 return self; 159 out_delete: 160 perf_session__delete(self); 161 return NULL; 162 } 163 164 static void perf_session__delete_dead_threads(struct perf_session *session) 165 { 166 machine__delete_dead_threads(&session->host_machine); 167 } 168 169 static void perf_session__delete_threads(struct perf_session *session) 170 { 171 machine__delete_threads(&session->host_machine); 172 } 173 174 static void perf_session_env__delete(struct perf_session_env *env) 175 { 176 free(env->hostname); 177 free(env->os_release); 178 free(env->version); 179 free(env->arch); 180 free(env->cpu_desc); 181 free(env->cpuid); 182 183 free(env->cmdline); 184 free(env->sibling_cores); 185 free(env->sibling_threads); 186 free(env->numa_nodes); 187 free(env->pmu_mappings); 188 } 189 190 void perf_session__delete(struct perf_session *self) 191 { 192 perf_session__destroy_kernel_maps(self); 193 perf_session__delete_dead_threads(self); 194 perf_session__delete_threads(self); 195 perf_session_env__delete(&self->header.env); 196 machine__exit(&self->host_machine); 197 close(self->fd); 198 free(self); 199 vdso__exit(); 200 } 201 202 static int process_event_synth_tracing_data_stub(union perf_event *event 203 __maybe_unused, 204 struct perf_session *session 205 __maybe_unused) 206 { 207 dump_printf(": unhandled!\n"); 208 return 0; 209 } 210 211 static int process_event_synth_attr_stub(union perf_event *event __maybe_unused, 212 struct perf_evlist **pevlist 213 __maybe_unused) 214 { 215 dump_printf(": unhandled!\n"); 216 return 0; 217 } 218 219 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused, 220 union perf_event *event __maybe_unused, 221 struct perf_sample *sample __maybe_unused, 222 struct perf_evsel *evsel __maybe_unused, 223 struct machine *machine __maybe_unused) 224 { 225 dump_printf(": unhandled!\n"); 226 return 0; 227 } 228 229 static int process_event_stub(struct perf_tool *tool __maybe_unused, 230 union perf_event *event __maybe_unused, 231 struct perf_sample *sample __maybe_unused, 232 struct machine *machine __maybe_unused) 233 { 234 dump_printf(": unhandled!\n"); 235 return 0; 236 } 237 238 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused, 239 union perf_event *event __maybe_unused, 240 struct perf_session *perf_session 241 __maybe_unused) 242 { 243 dump_printf(": unhandled!\n"); 244 return 0; 245 } 246 247 static int process_event_type_stub(struct perf_tool *tool __maybe_unused, 248 union perf_event *event __maybe_unused) 249 { 250 dump_printf(": unhandled!\n"); 251 return 0; 252 } 253 254 static int process_finished_round(struct perf_tool *tool, 255 union perf_event *event, 256 struct perf_session *session); 257 258 static void perf_tool__fill_defaults(struct perf_tool *tool) 259 { 260 if (tool->sample == NULL) 261 tool->sample = process_event_sample_stub; 262 if (tool->mmap == NULL) 263 tool->mmap = process_event_stub; 264 if (tool->comm == NULL) 265 tool->comm = process_event_stub; 266 if (tool->fork == NULL) 267 tool->fork = process_event_stub; 268 if (tool->exit == NULL) 269 tool->exit = process_event_stub; 270 if (tool->lost == NULL) 271 tool->lost = perf_event__process_lost; 272 if (tool->read == NULL) 273 tool->read = process_event_sample_stub; 274 if (tool->throttle == NULL) 275 tool->throttle = process_event_stub; 276 if (tool->unthrottle == NULL) 277 tool->unthrottle = process_event_stub; 278 if (tool->attr == NULL) 279 tool->attr = process_event_synth_attr_stub; 280 if (tool->event_type == NULL) 281 tool->event_type = process_event_type_stub; 282 if (tool->tracing_data == NULL) 283 tool->tracing_data = process_event_synth_tracing_data_stub; 284 if (tool->build_id == NULL) 285 tool->build_id = process_finished_round_stub; 286 if (tool->finished_round == NULL) { 287 if (tool->ordered_samples) 288 tool->finished_round = process_finished_round; 289 else 290 tool->finished_round = process_finished_round_stub; 291 } 292 } 293 294 void mem_bswap_32(void *src, int byte_size) 295 { 296 u32 *m = src; 297 while (byte_size > 0) { 298 *m = bswap_32(*m); 299 byte_size -= sizeof(u32); 300 ++m; 301 } 302 } 303 304 void mem_bswap_64(void *src, int byte_size) 305 { 306 u64 *m = src; 307 308 while (byte_size > 0) { 309 *m = bswap_64(*m); 310 byte_size -= sizeof(u64); 311 ++m; 312 } 313 } 314 315 static void swap_sample_id_all(union perf_event *event, void *data) 316 { 317 void *end = (void *) event + event->header.size; 318 int size = end - data; 319 320 BUG_ON(size % sizeof(u64)); 321 mem_bswap_64(data, size); 322 } 323 324 static void perf_event__all64_swap(union perf_event *event, 325 bool sample_id_all __maybe_unused) 326 { 327 struct perf_event_header *hdr = &event->header; 328 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 329 } 330 331 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 332 { 333 event->comm.pid = bswap_32(event->comm.pid); 334 event->comm.tid = bswap_32(event->comm.tid); 335 336 if (sample_id_all) { 337 void *data = &event->comm.comm; 338 339 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 340 swap_sample_id_all(event, data); 341 } 342 } 343 344 static void perf_event__mmap_swap(union perf_event *event, 345 bool sample_id_all) 346 { 347 event->mmap.pid = bswap_32(event->mmap.pid); 348 event->mmap.tid = bswap_32(event->mmap.tid); 349 event->mmap.start = bswap_64(event->mmap.start); 350 event->mmap.len = bswap_64(event->mmap.len); 351 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 352 353 if (sample_id_all) { 354 void *data = &event->mmap.filename; 355 356 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 357 swap_sample_id_all(event, data); 358 } 359 } 360 361 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 362 { 363 event->fork.pid = bswap_32(event->fork.pid); 364 event->fork.tid = bswap_32(event->fork.tid); 365 event->fork.ppid = bswap_32(event->fork.ppid); 366 event->fork.ptid = bswap_32(event->fork.ptid); 367 event->fork.time = bswap_64(event->fork.time); 368 369 if (sample_id_all) 370 swap_sample_id_all(event, &event->fork + 1); 371 } 372 373 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 374 { 375 event->read.pid = bswap_32(event->read.pid); 376 event->read.tid = bswap_32(event->read.tid); 377 event->read.value = bswap_64(event->read.value); 378 event->read.time_enabled = bswap_64(event->read.time_enabled); 379 event->read.time_running = bswap_64(event->read.time_running); 380 event->read.id = bswap_64(event->read.id); 381 382 if (sample_id_all) 383 swap_sample_id_all(event, &event->read + 1); 384 } 385 386 static u8 revbyte(u8 b) 387 { 388 int rev = (b >> 4) | ((b & 0xf) << 4); 389 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 390 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 391 return (u8) rev; 392 } 393 394 /* 395 * XXX this is hack in attempt to carry flags bitfield 396 * throught endian village. ABI says: 397 * 398 * Bit-fields are allocated from right to left (least to most significant) 399 * on little-endian implementations and from left to right (most to least 400 * significant) on big-endian implementations. 401 * 402 * The above seems to be byte specific, so we need to reverse each 403 * byte of the bitfield. 'Internet' also says this might be implementation 404 * specific and we probably need proper fix and carry perf_event_attr 405 * bitfield flags in separate data file FEAT_ section. Thought this seems 406 * to work for now. 407 */ 408 static void swap_bitfield(u8 *p, unsigned len) 409 { 410 unsigned i; 411 412 for (i = 0; i < len; i++) { 413 *p = revbyte(*p); 414 p++; 415 } 416 } 417 418 /* exported for swapping attributes in file header */ 419 void perf_event__attr_swap(struct perf_event_attr *attr) 420 { 421 attr->type = bswap_32(attr->type); 422 attr->size = bswap_32(attr->size); 423 attr->config = bswap_64(attr->config); 424 attr->sample_period = bswap_64(attr->sample_period); 425 attr->sample_type = bswap_64(attr->sample_type); 426 attr->read_format = bswap_64(attr->read_format); 427 attr->wakeup_events = bswap_32(attr->wakeup_events); 428 attr->bp_type = bswap_32(attr->bp_type); 429 attr->bp_addr = bswap_64(attr->bp_addr); 430 attr->bp_len = bswap_64(attr->bp_len); 431 432 swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64)); 433 } 434 435 static void perf_event__hdr_attr_swap(union perf_event *event, 436 bool sample_id_all __maybe_unused) 437 { 438 size_t size; 439 440 perf_event__attr_swap(&event->attr.attr); 441 442 size = event->header.size; 443 size -= (void *)&event->attr.id - (void *)event; 444 mem_bswap_64(event->attr.id, size); 445 } 446 447 static void perf_event__event_type_swap(union perf_event *event, 448 bool sample_id_all __maybe_unused) 449 { 450 event->event_type.event_type.event_id = 451 bswap_64(event->event_type.event_type.event_id); 452 } 453 454 static void perf_event__tracing_data_swap(union perf_event *event, 455 bool sample_id_all __maybe_unused) 456 { 457 event->tracing_data.size = bswap_32(event->tracing_data.size); 458 } 459 460 typedef void (*perf_event__swap_op)(union perf_event *event, 461 bool sample_id_all); 462 463 static perf_event__swap_op perf_event__swap_ops[] = { 464 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 465 [PERF_RECORD_COMM] = perf_event__comm_swap, 466 [PERF_RECORD_FORK] = perf_event__task_swap, 467 [PERF_RECORD_EXIT] = perf_event__task_swap, 468 [PERF_RECORD_LOST] = perf_event__all64_swap, 469 [PERF_RECORD_READ] = perf_event__read_swap, 470 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 471 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 472 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 473 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 474 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 475 [PERF_RECORD_HEADER_MAX] = NULL, 476 }; 477 478 struct sample_queue { 479 u64 timestamp; 480 u64 file_offset; 481 union perf_event *event; 482 struct list_head list; 483 }; 484 485 static void perf_session_free_sample_buffers(struct perf_session *session) 486 { 487 struct ordered_samples *os = &session->ordered_samples; 488 489 while (!list_empty(&os->to_free)) { 490 struct sample_queue *sq; 491 492 sq = list_entry(os->to_free.next, struct sample_queue, list); 493 list_del(&sq->list); 494 free(sq); 495 } 496 } 497 498 static int perf_session_deliver_event(struct perf_session *session, 499 union perf_event *event, 500 struct perf_sample *sample, 501 struct perf_tool *tool, 502 u64 file_offset); 503 504 static int flush_sample_queue(struct perf_session *s, 505 struct perf_tool *tool) 506 { 507 struct ordered_samples *os = &s->ordered_samples; 508 struct list_head *head = &os->samples; 509 struct sample_queue *tmp, *iter; 510 struct perf_sample sample; 511 u64 limit = os->next_flush; 512 u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL; 513 unsigned idx = 0, progress_next = os->nr_samples / 16; 514 int ret; 515 516 if (!tool->ordered_samples || !limit) 517 return 0; 518 519 list_for_each_entry_safe(iter, tmp, head, list) { 520 if (iter->timestamp > limit) 521 break; 522 523 ret = perf_evlist__parse_sample(s->evlist, iter->event, &sample); 524 if (ret) 525 pr_err("Can't parse sample, err = %d\n", ret); 526 else { 527 ret = perf_session_deliver_event(s, iter->event, &sample, tool, 528 iter->file_offset); 529 if (ret) 530 return ret; 531 } 532 533 os->last_flush = iter->timestamp; 534 list_del(&iter->list); 535 list_add(&iter->list, &os->sample_cache); 536 if (++idx >= progress_next) { 537 progress_next += os->nr_samples / 16; 538 ui_progress__update(idx, os->nr_samples, 539 "Processing time ordered events..."); 540 } 541 } 542 543 if (list_empty(head)) { 544 os->last_sample = NULL; 545 } else if (last_ts <= limit) { 546 os->last_sample = 547 list_entry(head->prev, struct sample_queue, list); 548 } 549 550 os->nr_samples = 0; 551 552 return 0; 553 } 554 555 /* 556 * When perf record finishes a pass on every buffers, it records this pseudo 557 * event. 558 * We record the max timestamp t found in the pass n. 559 * Assuming these timestamps are monotonic across cpus, we know that if 560 * a buffer still has events with timestamps below t, they will be all 561 * available and then read in the pass n + 1. 562 * Hence when we start to read the pass n + 2, we can safely flush every 563 * events with timestamps below t. 564 * 565 * ============ PASS n ================= 566 * CPU 0 | CPU 1 567 * | 568 * cnt1 timestamps | cnt2 timestamps 569 * 1 | 2 570 * 2 | 3 571 * - | 4 <--- max recorded 572 * 573 * ============ PASS n + 1 ============== 574 * CPU 0 | CPU 1 575 * | 576 * cnt1 timestamps | cnt2 timestamps 577 * 3 | 5 578 * 4 | 6 579 * 5 | 7 <---- max recorded 580 * 581 * Flush every events below timestamp 4 582 * 583 * ============ PASS n + 2 ============== 584 * CPU 0 | CPU 1 585 * | 586 * cnt1 timestamps | cnt2 timestamps 587 * 6 | 8 588 * 7 | 9 589 * - | 10 590 * 591 * Flush every events below timestamp 7 592 * etc... 593 */ 594 static int process_finished_round(struct perf_tool *tool, 595 union perf_event *event __maybe_unused, 596 struct perf_session *session) 597 { 598 int ret = flush_sample_queue(session, tool); 599 if (!ret) 600 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp; 601 602 return ret; 603 } 604 605 /* The queue is ordered by time */ 606 static void __queue_event(struct sample_queue *new, struct perf_session *s) 607 { 608 struct ordered_samples *os = &s->ordered_samples; 609 struct sample_queue *sample = os->last_sample; 610 u64 timestamp = new->timestamp; 611 struct list_head *p; 612 613 ++os->nr_samples; 614 os->last_sample = new; 615 616 if (!sample) { 617 list_add(&new->list, &os->samples); 618 os->max_timestamp = timestamp; 619 return; 620 } 621 622 /* 623 * last_sample might point to some random place in the list as it's 624 * the last queued event. We expect that the new event is close to 625 * this. 626 */ 627 if (sample->timestamp <= timestamp) { 628 while (sample->timestamp <= timestamp) { 629 p = sample->list.next; 630 if (p == &os->samples) { 631 list_add_tail(&new->list, &os->samples); 632 os->max_timestamp = timestamp; 633 return; 634 } 635 sample = list_entry(p, struct sample_queue, list); 636 } 637 list_add_tail(&new->list, &sample->list); 638 } else { 639 while (sample->timestamp > timestamp) { 640 p = sample->list.prev; 641 if (p == &os->samples) { 642 list_add(&new->list, &os->samples); 643 return; 644 } 645 sample = list_entry(p, struct sample_queue, list); 646 } 647 list_add(&new->list, &sample->list); 648 } 649 } 650 651 #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue)) 652 653 static int perf_session_queue_event(struct perf_session *s, union perf_event *event, 654 struct perf_sample *sample, u64 file_offset) 655 { 656 struct ordered_samples *os = &s->ordered_samples; 657 struct list_head *sc = &os->sample_cache; 658 u64 timestamp = sample->time; 659 struct sample_queue *new; 660 661 if (!timestamp || timestamp == ~0ULL) 662 return -ETIME; 663 664 if (timestamp < s->ordered_samples.last_flush) { 665 printf("Warning: Timestamp below last timeslice flush\n"); 666 return -EINVAL; 667 } 668 669 if (!list_empty(sc)) { 670 new = list_entry(sc->next, struct sample_queue, list); 671 list_del(&new->list); 672 } else if (os->sample_buffer) { 673 new = os->sample_buffer + os->sample_buffer_idx; 674 if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER) 675 os->sample_buffer = NULL; 676 } else { 677 os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new)); 678 if (!os->sample_buffer) 679 return -ENOMEM; 680 list_add(&os->sample_buffer->list, &os->to_free); 681 os->sample_buffer_idx = 2; 682 new = os->sample_buffer + 1; 683 } 684 685 new->timestamp = timestamp; 686 new->file_offset = file_offset; 687 new->event = event; 688 689 __queue_event(new, s); 690 691 return 0; 692 } 693 694 static void callchain__printf(struct perf_sample *sample) 695 { 696 unsigned int i; 697 698 printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr); 699 700 for (i = 0; i < sample->callchain->nr; i++) 701 printf("..... %2d: %016" PRIx64 "\n", 702 i, sample->callchain->ips[i]); 703 } 704 705 static void branch_stack__printf(struct perf_sample *sample) 706 { 707 uint64_t i; 708 709 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr); 710 711 for (i = 0; i < sample->branch_stack->nr; i++) 712 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n", 713 i, sample->branch_stack->entries[i].from, 714 sample->branch_stack->entries[i].to); 715 } 716 717 static void regs_dump__printf(u64 mask, u64 *regs) 718 { 719 unsigned rid, i = 0; 720 721 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { 722 u64 val = regs[i++]; 723 724 printf(".... %-5s 0x%" PRIx64 "\n", 725 perf_reg_name(rid), val); 726 } 727 } 728 729 static void regs_user__printf(struct perf_sample *sample, u64 mask) 730 { 731 struct regs_dump *user_regs = &sample->user_regs; 732 733 if (user_regs->regs) { 734 printf("... user regs: mask 0x%" PRIx64 "\n", mask); 735 regs_dump__printf(mask, user_regs->regs); 736 } 737 } 738 739 static void stack_user__printf(struct stack_dump *dump) 740 { 741 printf("... ustack: size %" PRIu64 ", offset 0x%x\n", 742 dump->size, dump->offset); 743 } 744 745 static void perf_session__print_tstamp(struct perf_session *session, 746 union perf_event *event, 747 struct perf_sample *sample) 748 { 749 u64 sample_type = perf_evlist__sample_type(session->evlist); 750 751 if (event->header.type != PERF_RECORD_SAMPLE && 752 !perf_evlist__sample_id_all(session->evlist)) { 753 fputs("-1 -1 ", stdout); 754 return; 755 } 756 757 if ((sample_type & PERF_SAMPLE_CPU)) 758 printf("%u ", sample->cpu); 759 760 if (sample_type & PERF_SAMPLE_TIME) 761 printf("%" PRIu64 " ", sample->time); 762 } 763 764 static void dump_event(struct perf_session *session, union perf_event *event, 765 u64 file_offset, struct perf_sample *sample) 766 { 767 if (!dump_trace) 768 return; 769 770 printf("\n%#" PRIx64 " [%#x]: event: %d\n", 771 file_offset, event->header.size, event->header.type); 772 773 trace_event(event); 774 775 if (sample) 776 perf_session__print_tstamp(session, event, sample); 777 778 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 779 event->header.size, perf_event__name(event->header.type)); 780 } 781 782 static void dump_sample(struct perf_evsel *evsel, union perf_event *event, 783 struct perf_sample *sample) 784 { 785 u64 sample_type; 786 787 if (!dump_trace) 788 return; 789 790 printf("(IP, %d): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 791 event->header.misc, sample->pid, sample->tid, sample->ip, 792 sample->period, sample->addr); 793 794 sample_type = evsel->attr.sample_type; 795 796 if (sample_type & PERF_SAMPLE_CALLCHAIN) 797 callchain__printf(sample); 798 799 if (sample_type & PERF_SAMPLE_BRANCH_STACK) 800 branch_stack__printf(sample); 801 802 if (sample_type & PERF_SAMPLE_REGS_USER) 803 regs_user__printf(sample, evsel->attr.sample_regs_user); 804 805 if (sample_type & PERF_SAMPLE_STACK_USER) 806 stack_user__printf(&sample->user_stack); 807 } 808 809 static struct machine * 810 perf_session__find_machine_for_cpumode(struct perf_session *session, 811 union perf_event *event) 812 { 813 const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 814 815 if (perf_guest && 816 ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 817 (cpumode == PERF_RECORD_MISC_GUEST_USER))) { 818 u32 pid; 819 820 if (event->header.type == PERF_RECORD_MMAP) 821 pid = event->mmap.pid; 822 else 823 pid = event->ip.pid; 824 825 return perf_session__findnew_machine(session, pid); 826 } 827 828 return perf_session__find_host_machine(session); 829 } 830 831 static int perf_session_deliver_event(struct perf_session *session, 832 union perf_event *event, 833 struct perf_sample *sample, 834 struct perf_tool *tool, 835 u64 file_offset) 836 { 837 struct perf_evsel *evsel; 838 struct machine *machine; 839 840 dump_event(session, event, file_offset, sample); 841 842 evsel = perf_evlist__id2evsel(session->evlist, sample->id); 843 if (evsel != NULL && event->header.type != PERF_RECORD_SAMPLE) { 844 /* 845 * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here 846 * because the tools right now may apply filters, discarding 847 * some of the samples. For consistency, in the future we 848 * should have something like nr_filtered_samples and remove 849 * the sample->period from total_sample_period, etc, KISS for 850 * now tho. 851 * 852 * Also testing against NULL allows us to handle files without 853 * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the 854 * future probably it'll be a good idea to restrict event 855 * processing via perf_session to files with both set. 856 */ 857 hists__inc_nr_events(&evsel->hists, event->header.type); 858 } 859 860 machine = perf_session__find_machine_for_cpumode(session, event); 861 862 switch (event->header.type) { 863 case PERF_RECORD_SAMPLE: 864 dump_sample(evsel, event, sample); 865 if (evsel == NULL) { 866 ++session->hists.stats.nr_unknown_id; 867 return 0; 868 } 869 if (machine == NULL) { 870 ++session->hists.stats.nr_unprocessable_samples; 871 return 0; 872 } 873 return tool->sample(tool, event, sample, evsel, machine); 874 case PERF_RECORD_MMAP: 875 return tool->mmap(tool, event, sample, machine); 876 case PERF_RECORD_COMM: 877 return tool->comm(tool, event, sample, machine); 878 case PERF_RECORD_FORK: 879 return tool->fork(tool, event, sample, machine); 880 case PERF_RECORD_EXIT: 881 return tool->exit(tool, event, sample, machine); 882 case PERF_RECORD_LOST: 883 if (tool->lost == perf_event__process_lost) 884 session->hists.stats.total_lost += event->lost.lost; 885 return tool->lost(tool, event, sample, machine); 886 case PERF_RECORD_READ: 887 return tool->read(tool, event, sample, evsel, machine); 888 case PERF_RECORD_THROTTLE: 889 return tool->throttle(tool, event, sample, machine); 890 case PERF_RECORD_UNTHROTTLE: 891 return tool->unthrottle(tool, event, sample, machine); 892 default: 893 ++session->hists.stats.nr_unknown_events; 894 return -1; 895 } 896 } 897 898 static int perf_session__preprocess_sample(struct perf_session *session, 899 union perf_event *event, struct perf_sample *sample) 900 { 901 if (event->header.type != PERF_RECORD_SAMPLE || 902 !(perf_evlist__sample_type(session->evlist) & PERF_SAMPLE_CALLCHAIN)) 903 return 0; 904 905 if (!ip_callchain__valid(sample->callchain, event)) { 906 pr_debug("call-chain problem with event, skipping it.\n"); 907 ++session->hists.stats.nr_invalid_chains; 908 session->hists.stats.total_invalid_chains += sample->period; 909 return -EINVAL; 910 } 911 return 0; 912 } 913 914 static int perf_session__process_user_event(struct perf_session *session, union perf_event *event, 915 struct perf_tool *tool, u64 file_offset) 916 { 917 int err; 918 919 dump_event(session, event, file_offset, NULL); 920 921 /* These events are processed right away */ 922 switch (event->header.type) { 923 case PERF_RECORD_HEADER_ATTR: 924 err = tool->attr(event, &session->evlist); 925 if (err == 0) 926 perf_session__set_id_hdr_size(session); 927 return err; 928 case PERF_RECORD_HEADER_EVENT_TYPE: 929 return tool->event_type(tool, event); 930 case PERF_RECORD_HEADER_TRACING_DATA: 931 /* setup for reading amidst mmap */ 932 lseek(session->fd, file_offset, SEEK_SET); 933 return tool->tracing_data(event, session); 934 case PERF_RECORD_HEADER_BUILD_ID: 935 return tool->build_id(tool, event, session); 936 case PERF_RECORD_FINISHED_ROUND: 937 return tool->finished_round(tool, event, session); 938 default: 939 return -EINVAL; 940 } 941 } 942 943 static void event_swap(union perf_event *event, bool sample_id_all) 944 { 945 perf_event__swap_op swap; 946 947 swap = perf_event__swap_ops[event->header.type]; 948 if (swap) 949 swap(event, sample_id_all); 950 } 951 952 static int perf_session__process_event(struct perf_session *session, 953 union perf_event *event, 954 struct perf_tool *tool, 955 u64 file_offset) 956 { 957 struct perf_sample sample; 958 int ret; 959 960 if (session->header.needs_swap) 961 event_swap(event, perf_evlist__sample_id_all(session->evlist)); 962 963 if (event->header.type >= PERF_RECORD_HEADER_MAX) 964 return -EINVAL; 965 966 hists__inc_nr_events(&session->hists, event->header.type); 967 968 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 969 return perf_session__process_user_event(session, event, tool, file_offset); 970 971 /* 972 * For all kernel events we get the sample data 973 */ 974 ret = perf_evlist__parse_sample(session->evlist, event, &sample); 975 if (ret) 976 return ret; 977 978 /* Preprocess sample records - precheck callchains */ 979 if (perf_session__preprocess_sample(session, event, &sample)) 980 return 0; 981 982 if (tool->ordered_samples) { 983 ret = perf_session_queue_event(session, event, &sample, 984 file_offset); 985 if (ret != -ETIME) 986 return ret; 987 } 988 989 return perf_session_deliver_event(session, event, &sample, tool, 990 file_offset); 991 } 992 993 void perf_event_header__bswap(struct perf_event_header *self) 994 { 995 self->type = bswap_32(self->type); 996 self->misc = bswap_16(self->misc); 997 self->size = bswap_16(self->size); 998 } 999 1000 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1001 { 1002 return machine__findnew_thread(&session->host_machine, pid); 1003 } 1004 1005 static struct thread *perf_session__register_idle_thread(struct perf_session *self) 1006 { 1007 struct thread *thread = perf_session__findnew(self, 0); 1008 1009 if (thread == NULL || thread__set_comm(thread, "swapper")) { 1010 pr_err("problem inserting idle task.\n"); 1011 thread = NULL; 1012 } 1013 1014 return thread; 1015 } 1016 1017 static void perf_session__warn_about_errors(const struct perf_session *session, 1018 const struct perf_tool *tool) 1019 { 1020 if (tool->lost == perf_event__process_lost && 1021 session->hists.stats.nr_events[PERF_RECORD_LOST] != 0) { 1022 ui__warning("Processed %d events and lost %d chunks!\n\n" 1023 "Check IO/CPU overload!\n\n", 1024 session->hists.stats.nr_events[0], 1025 session->hists.stats.nr_events[PERF_RECORD_LOST]); 1026 } 1027 1028 if (session->hists.stats.nr_unknown_events != 0) { 1029 ui__warning("Found %u unknown events!\n\n" 1030 "Is this an older tool processing a perf.data " 1031 "file generated by a more recent tool?\n\n" 1032 "If that is not the case, consider " 1033 "reporting to linux-kernel@vger.kernel.org.\n\n", 1034 session->hists.stats.nr_unknown_events); 1035 } 1036 1037 if (session->hists.stats.nr_unknown_id != 0) { 1038 ui__warning("%u samples with id not present in the header\n", 1039 session->hists.stats.nr_unknown_id); 1040 } 1041 1042 if (session->hists.stats.nr_invalid_chains != 0) { 1043 ui__warning("Found invalid callchains!\n\n" 1044 "%u out of %u events were discarded for this reason.\n\n" 1045 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1046 session->hists.stats.nr_invalid_chains, 1047 session->hists.stats.nr_events[PERF_RECORD_SAMPLE]); 1048 } 1049 1050 if (session->hists.stats.nr_unprocessable_samples != 0) { 1051 ui__warning("%u unprocessable samples recorded.\n" 1052 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1053 session->hists.stats.nr_unprocessable_samples); 1054 } 1055 } 1056 1057 #define session_done() (*(volatile int *)(&session_done)) 1058 volatile int session_done; 1059 1060 static int __perf_session__process_pipe_events(struct perf_session *self, 1061 struct perf_tool *tool) 1062 { 1063 union perf_event *event; 1064 uint32_t size, cur_size = 0; 1065 void *buf = NULL; 1066 int skip = 0; 1067 u64 head; 1068 int err; 1069 void *p; 1070 1071 perf_tool__fill_defaults(tool); 1072 1073 head = 0; 1074 cur_size = sizeof(union perf_event); 1075 1076 buf = malloc(cur_size); 1077 if (!buf) 1078 return -errno; 1079 more: 1080 event = buf; 1081 err = readn(self->fd, event, sizeof(struct perf_event_header)); 1082 if (err <= 0) { 1083 if (err == 0) 1084 goto done; 1085 1086 pr_err("failed to read event header\n"); 1087 goto out_err; 1088 } 1089 1090 if (self->header.needs_swap) 1091 perf_event_header__bswap(&event->header); 1092 1093 size = event->header.size; 1094 if (size == 0) 1095 size = 8; 1096 1097 if (size > cur_size) { 1098 void *new = realloc(buf, size); 1099 if (!new) { 1100 pr_err("failed to allocate memory to read event\n"); 1101 goto out_err; 1102 } 1103 buf = new; 1104 cur_size = size; 1105 event = buf; 1106 } 1107 p = event; 1108 p += sizeof(struct perf_event_header); 1109 1110 if (size - sizeof(struct perf_event_header)) { 1111 err = readn(self->fd, p, size - sizeof(struct perf_event_header)); 1112 if (err <= 0) { 1113 if (err == 0) { 1114 pr_err("unexpected end of event stream\n"); 1115 goto done; 1116 } 1117 1118 pr_err("failed to read event data\n"); 1119 goto out_err; 1120 } 1121 } 1122 1123 if ((skip = perf_session__process_event(self, event, tool, head)) < 0) { 1124 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1125 head, event->header.size, event->header.type); 1126 err = -EINVAL; 1127 goto out_err; 1128 } 1129 1130 head += size; 1131 1132 if (skip > 0) 1133 head += skip; 1134 1135 if (!session_done()) 1136 goto more; 1137 done: 1138 err = 0; 1139 out_err: 1140 free(buf); 1141 perf_session__warn_about_errors(self, tool); 1142 perf_session_free_sample_buffers(self); 1143 return err; 1144 } 1145 1146 static union perf_event * 1147 fetch_mmaped_event(struct perf_session *session, 1148 u64 head, size_t mmap_size, char *buf) 1149 { 1150 union perf_event *event; 1151 1152 /* 1153 * Ensure we have enough space remaining to read 1154 * the size of the event in the headers. 1155 */ 1156 if (head + sizeof(event->header) > mmap_size) 1157 return NULL; 1158 1159 event = (union perf_event *)(buf + head); 1160 1161 if (session->header.needs_swap) 1162 perf_event_header__bswap(&event->header); 1163 1164 if (head + event->header.size > mmap_size) 1165 return NULL; 1166 1167 return event; 1168 } 1169 1170 /* 1171 * On 64bit we can mmap the data file in one go. No need for tiny mmap 1172 * slices. On 32bit we use 32MB. 1173 */ 1174 #if BITS_PER_LONG == 64 1175 #define MMAP_SIZE ULLONG_MAX 1176 #define NUM_MMAPS 1 1177 #else 1178 #define MMAP_SIZE (32 * 1024 * 1024ULL) 1179 #define NUM_MMAPS 128 1180 #endif 1181 1182 int __perf_session__process_events(struct perf_session *session, 1183 u64 data_offset, u64 data_size, 1184 u64 file_size, struct perf_tool *tool) 1185 { 1186 u64 head, page_offset, file_offset, file_pos, progress_next; 1187 int err, mmap_prot, mmap_flags, map_idx = 0; 1188 size_t mmap_size; 1189 char *buf, *mmaps[NUM_MMAPS]; 1190 union perf_event *event; 1191 uint32_t size; 1192 1193 perf_tool__fill_defaults(tool); 1194 1195 page_offset = page_size * (data_offset / page_size); 1196 file_offset = page_offset; 1197 head = data_offset - page_offset; 1198 1199 if (data_offset + data_size < file_size) 1200 file_size = data_offset + data_size; 1201 1202 progress_next = file_size / 16; 1203 1204 mmap_size = MMAP_SIZE; 1205 if (mmap_size > file_size) 1206 mmap_size = file_size; 1207 1208 memset(mmaps, 0, sizeof(mmaps)); 1209 1210 mmap_prot = PROT_READ; 1211 mmap_flags = MAP_SHARED; 1212 1213 if (session->header.needs_swap) { 1214 mmap_prot |= PROT_WRITE; 1215 mmap_flags = MAP_PRIVATE; 1216 } 1217 remap: 1218 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, session->fd, 1219 file_offset); 1220 if (buf == MAP_FAILED) { 1221 pr_err("failed to mmap file\n"); 1222 err = -errno; 1223 goto out_err; 1224 } 1225 mmaps[map_idx] = buf; 1226 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 1227 file_pos = file_offset + head; 1228 1229 more: 1230 event = fetch_mmaped_event(session, head, mmap_size, buf); 1231 if (!event) { 1232 if (mmaps[map_idx]) { 1233 munmap(mmaps[map_idx], mmap_size); 1234 mmaps[map_idx] = NULL; 1235 } 1236 1237 page_offset = page_size * (head / page_size); 1238 file_offset += page_offset; 1239 head -= page_offset; 1240 goto remap; 1241 } 1242 1243 size = event->header.size; 1244 1245 if (size == 0 || 1246 perf_session__process_event(session, event, tool, file_pos) < 0) { 1247 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1248 file_offset + head, event->header.size, 1249 event->header.type); 1250 err = -EINVAL; 1251 goto out_err; 1252 } 1253 1254 head += size; 1255 file_pos += size; 1256 1257 if (file_pos >= progress_next) { 1258 progress_next += file_size / 16; 1259 ui_progress__update(file_pos, file_size, 1260 "Processing events..."); 1261 } 1262 1263 if (file_pos < file_size) 1264 goto more; 1265 1266 err = 0; 1267 /* do the final flush for ordered samples */ 1268 session->ordered_samples.next_flush = ULLONG_MAX; 1269 err = flush_sample_queue(session, tool); 1270 out_err: 1271 ui_progress__finish(); 1272 perf_session__warn_about_errors(session, tool); 1273 perf_session_free_sample_buffers(session); 1274 return err; 1275 } 1276 1277 int perf_session__process_events(struct perf_session *self, 1278 struct perf_tool *tool) 1279 { 1280 int err; 1281 1282 if (perf_session__register_idle_thread(self) == NULL) 1283 return -ENOMEM; 1284 1285 if (!self->fd_pipe) 1286 err = __perf_session__process_events(self, 1287 self->header.data_offset, 1288 self->header.data_size, 1289 self->size, tool); 1290 else 1291 err = __perf_session__process_pipe_events(self, tool); 1292 1293 return err; 1294 } 1295 1296 bool perf_session__has_traces(struct perf_session *session, const char *msg) 1297 { 1298 if (!(perf_evlist__sample_type(session->evlist) & PERF_SAMPLE_RAW)) { 1299 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 1300 return false; 1301 } 1302 1303 return true; 1304 } 1305 1306 int maps__set_kallsyms_ref_reloc_sym(struct map **maps, 1307 const char *symbol_name, u64 addr) 1308 { 1309 char *bracket; 1310 enum map_type i; 1311 struct ref_reloc_sym *ref; 1312 1313 ref = zalloc(sizeof(struct ref_reloc_sym)); 1314 if (ref == NULL) 1315 return -ENOMEM; 1316 1317 ref->name = strdup(symbol_name); 1318 if (ref->name == NULL) { 1319 free(ref); 1320 return -ENOMEM; 1321 } 1322 1323 bracket = strchr(ref->name, ']'); 1324 if (bracket) 1325 *bracket = '\0'; 1326 1327 ref->addr = addr; 1328 1329 for (i = 0; i < MAP__NR_TYPES; ++i) { 1330 struct kmap *kmap = map__kmap(maps[i]); 1331 kmap->ref_reloc_sym = ref; 1332 } 1333 1334 return 0; 1335 } 1336 1337 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp) 1338 { 1339 return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) + 1340 __dsos__fprintf(&self->host_machine.user_dsos, fp) + 1341 machines__fprintf_dsos(&self->machines, fp); 1342 } 1343 1344 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp, 1345 bool (skip)(struct dso *dso, int parm), int parm) 1346 { 1347 size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, skip, parm); 1348 return ret + machines__fprintf_dsos_buildid(&self->machines, fp, skip, parm); 1349 } 1350 1351 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 1352 { 1353 struct perf_evsel *pos; 1354 size_t ret = fprintf(fp, "Aggregated stats:\n"); 1355 1356 ret += events_stats__fprintf(&session->hists.stats, fp); 1357 1358 list_for_each_entry(pos, &session->evlist->entries, node) { 1359 ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos)); 1360 ret += events_stats__fprintf(&pos->hists.stats, fp); 1361 } 1362 1363 return ret; 1364 } 1365 1366 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 1367 { 1368 /* 1369 * FIXME: Here we have to actually print all the machines in this 1370 * session, not just the host... 1371 */ 1372 return machine__fprintf(&session->host_machine, fp); 1373 } 1374 1375 void perf_session__remove_thread(struct perf_session *session, 1376 struct thread *th) 1377 { 1378 /* 1379 * FIXME: This one makes no sense, we need to remove the thread from 1380 * the machine it belongs to, perf_session can have many machines, so 1381 * doing it always on ->host_machine is wrong. Fix when auditing all 1382 * the 'perf kvm' code. 1383 */ 1384 machine__remove_thread(&session->host_machine, th); 1385 } 1386 1387 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, 1388 unsigned int type) 1389 { 1390 struct perf_evsel *pos; 1391 1392 list_for_each_entry(pos, &session->evlist->entries, node) { 1393 if (pos->attr.type == type) 1394 return pos; 1395 } 1396 return NULL; 1397 } 1398 1399 void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event, 1400 struct perf_sample *sample, struct machine *machine, 1401 int print_sym, int print_dso, int print_symoffset) 1402 { 1403 struct addr_location al; 1404 struct callchain_cursor_node *node; 1405 1406 if (perf_event__preprocess_sample(event, machine, &al, sample, 1407 NULL) < 0) { 1408 error("problem processing %d event, skipping it.\n", 1409 event->header.type); 1410 return; 1411 } 1412 1413 if (symbol_conf.use_callchain && sample->callchain) { 1414 1415 1416 if (machine__resolve_callchain(machine, evsel, al.thread, 1417 sample, NULL) != 0) { 1418 if (verbose) 1419 error("Failed to resolve callchain. Skipping\n"); 1420 return; 1421 } 1422 callchain_cursor_commit(&callchain_cursor); 1423 1424 while (1) { 1425 node = callchain_cursor_current(&callchain_cursor); 1426 if (!node) 1427 break; 1428 1429 printf("\t%16" PRIx64, node->ip); 1430 if (print_sym) { 1431 printf(" "); 1432 symbol__fprintf_symname(node->sym, stdout); 1433 } 1434 if (print_dso) { 1435 printf(" ("); 1436 map__fprintf_dsoname(node->map, stdout); 1437 printf(")"); 1438 } 1439 printf("\n"); 1440 1441 callchain_cursor_advance(&callchain_cursor); 1442 } 1443 1444 } else { 1445 printf("%16" PRIx64, sample->ip); 1446 if (print_sym) { 1447 printf(" "); 1448 if (print_symoffset) 1449 symbol__fprintf_symname_offs(al.sym, &al, 1450 stdout); 1451 else 1452 symbol__fprintf_symname(al.sym, stdout); 1453 } 1454 1455 if (print_dso) { 1456 printf(" ("); 1457 map__fprintf_dsoname(al.map, stdout); 1458 printf(")"); 1459 } 1460 } 1461 } 1462 1463 int perf_session__cpu_bitmap(struct perf_session *session, 1464 const char *cpu_list, unsigned long *cpu_bitmap) 1465 { 1466 int i; 1467 struct cpu_map *map; 1468 1469 for (i = 0; i < PERF_TYPE_MAX; ++i) { 1470 struct perf_evsel *evsel; 1471 1472 evsel = perf_session__find_first_evtype(session, i); 1473 if (!evsel) 1474 continue; 1475 1476 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) { 1477 pr_err("File does not contain CPU events. " 1478 "Remove -c option to proceed.\n"); 1479 return -1; 1480 } 1481 } 1482 1483 map = cpu_map__new(cpu_list); 1484 if (map == NULL) { 1485 pr_err("Invalid cpu_list\n"); 1486 return -1; 1487 } 1488 1489 for (i = 0; i < map->nr; i++) { 1490 int cpu = map->map[i]; 1491 1492 if (cpu >= MAX_NR_CPUS) { 1493 pr_err("Requested CPU %d too large. " 1494 "Consider raising MAX_NR_CPUS\n", cpu); 1495 return -1; 1496 } 1497 1498 set_bit(cpu, cpu_bitmap); 1499 } 1500 1501 return 0; 1502 } 1503 1504 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 1505 bool full) 1506 { 1507 struct stat st; 1508 int ret; 1509 1510 if (session == NULL || fp == NULL) 1511 return; 1512 1513 ret = fstat(session->fd, &st); 1514 if (ret == -1) 1515 return; 1516 1517 fprintf(fp, "# ========\n"); 1518 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime)); 1519 perf_header__fprintf_info(session, fp, full); 1520 fprintf(fp, "# ========\n#\n"); 1521 } 1522 1523 1524 int __perf_session__set_tracepoints_handlers(struct perf_session *session, 1525 const struct perf_evsel_str_handler *assocs, 1526 size_t nr_assocs) 1527 { 1528 struct perf_evlist *evlist = session->evlist; 1529 struct event_format *format; 1530 struct perf_evsel *evsel; 1531 char *tracepoint, *name; 1532 size_t i; 1533 int err; 1534 1535 for (i = 0; i < nr_assocs; i++) { 1536 err = -ENOMEM; 1537 tracepoint = strdup(assocs[i].name); 1538 if (tracepoint == NULL) 1539 goto out; 1540 1541 err = -ENOENT; 1542 name = strchr(tracepoint, ':'); 1543 if (name == NULL) 1544 goto out_free; 1545 1546 *name++ = '\0'; 1547 format = pevent_find_event_by_name(session->pevent, 1548 tracepoint, name); 1549 if (format == NULL) { 1550 /* 1551 * Adding a handler for an event not in the session, 1552 * just ignore it. 1553 */ 1554 goto next; 1555 } 1556 1557 evsel = perf_evlist__find_tracepoint_by_id(evlist, format->id); 1558 if (evsel == NULL) 1559 goto next; 1560 1561 err = -EEXIST; 1562 if (evsel->handler.func != NULL) 1563 goto out_free; 1564 evsel->handler.func = assocs[i].handler; 1565 next: 1566 free(tracepoint); 1567 } 1568 1569 err = 0; 1570 out: 1571 return err; 1572 1573 out_free: 1574 free(tracepoint); 1575 goto out; 1576 } 1577