1 #include <linux/kernel.h> 2 #include <traceevent/event-parse.h> 3 4 #include <byteswap.h> 5 #include <unistd.h> 6 #include <sys/types.h> 7 #include <sys/mman.h> 8 9 #include "evlist.h" 10 #include "evsel.h" 11 #include "session.h" 12 #include "tool.h" 13 #include "sort.h" 14 #include "util.h" 15 #include "cpumap.h" 16 #include "perf_regs.h" 17 #include "vdso.h" 18 19 static int perf_session__open(struct perf_session *session) 20 { 21 struct perf_data_file *file = session->file; 22 23 if (perf_session__read_header(session) < 0) { 24 pr_err("incompatible file format (rerun with -v to learn more)"); 25 return -1; 26 } 27 28 if (perf_data_file__is_pipe(file)) 29 return 0; 30 31 if (!perf_evlist__valid_sample_type(session->evlist)) { 32 pr_err("non matching sample_type"); 33 return -1; 34 } 35 36 if (!perf_evlist__valid_sample_id_all(session->evlist)) { 37 pr_err("non matching sample_id_all"); 38 return -1; 39 } 40 41 if (!perf_evlist__valid_read_format(session->evlist)) { 42 pr_err("non matching read_format"); 43 return -1; 44 } 45 46 return 0; 47 } 48 49 void perf_session__set_id_hdr_size(struct perf_session *session) 50 { 51 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist); 52 53 machines__set_id_hdr_size(&session->machines, id_hdr_size); 54 } 55 56 int perf_session__create_kernel_maps(struct perf_session *session) 57 { 58 int ret = machine__create_kernel_maps(&session->machines.host); 59 60 if (ret >= 0) 61 ret = machines__create_guest_kernel_maps(&session->machines); 62 return ret; 63 } 64 65 static void perf_session__destroy_kernel_maps(struct perf_session *session) 66 { 67 machines__destroy_kernel_maps(&session->machines); 68 } 69 70 struct perf_session *perf_session__new(struct perf_data_file *file, 71 bool repipe, struct perf_tool *tool) 72 { 73 struct perf_session *session = zalloc(sizeof(*session)); 74 75 if (!session) 76 goto out; 77 78 session->repipe = repipe; 79 INIT_LIST_HEAD(&session->ordered_samples.samples); 80 INIT_LIST_HEAD(&session->ordered_samples.sample_cache); 81 INIT_LIST_HEAD(&session->ordered_samples.to_free); 82 machines__init(&session->machines); 83 84 if (file) { 85 if (perf_data_file__open(file)) 86 goto out_delete; 87 88 session->file = file; 89 90 if (perf_data_file__is_read(file)) { 91 if (perf_session__open(session) < 0) 92 goto out_close; 93 94 perf_session__set_id_hdr_size(session); 95 } 96 } 97 98 if (!file || perf_data_file__is_write(file)) { 99 /* 100 * In O_RDONLY mode this will be performed when reading the 101 * kernel MMAP event, in perf_event__process_mmap(). 102 */ 103 if (perf_session__create_kernel_maps(session) < 0) 104 goto out_delete; 105 } 106 107 if (tool && tool->ordering_requires_timestamps && 108 tool->ordered_samples && !perf_evlist__sample_id_all(session->evlist)) { 109 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); 110 tool->ordered_samples = false; 111 } 112 113 return session; 114 115 out_close: 116 perf_data_file__close(file); 117 out_delete: 118 perf_session__delete(session); 119 out: 120 return NULL; 121 } 122 123 static void perf_session__delete_dead_threads(struct perf_session *session) 124 { 125 machine__delete_dead_threads(&session->machines.host); 126 } 127 128 static void perf_session__delete_threads(struct perf_session *session) 129 { 130 machine__delete_threads(&session->machines.host); 131 } 132 133 static void perf_session_env__delete(struct perf_session_env *env) 134 { 135 free(env->hostname); 136 free(env->os_release); 137 free(env->version); 138 free(env->arch); 139 free(env->cpu_desc); 140 free(env->cpuid); 141 142 free(env->cmdline); 143 free(env->sibling_cores); 144 free(env->sibling_threads); 145 free(env->numa_nodes); 146 free(env->pmu_mappings); 147 } 148 149 void perf_session__delete(struct perf_session *session) 150 { 151 perf_session__destroy_kernel_maps(session); 152 perf_session__delete_dead_threads(session); 153 perf_session__delete_threads(session); 154 perf_session_env__delete(&session->header.env); 155 machines__exit(&session->machines); 156 if (session->file) 157 perf_data_file__close(session->file); 158 free(session); 159 vdso__exit(); 160 } 161 162 static int process_event_synth_tracing_data_stub(struct perf_tool *tool 163 __maybe_unused, 164 union perf_event *event 165 __maybe_unused, 166 struct perf_session *session 167 __maybe_unused) 168 { 169 dump_printf(": unhandled!\n"); 170 return 0; 171 } 172 173 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused, 174 union perf_event *event __maybe_unused, 175 struct perf_evlist **pevlist 176 __maybe_unused) 177 { 178 dump_printf(": unhandled!\n"); 179 return 0; 180 } 181 182 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused, 183 union perf_event *event __maybe_unused, 184 struct perf_sample *sample __maybe_unused, 185 struct perf_evsel *evsel __maybe_unused, 186 struct machine *machine __maybe_unused) 187 { 188 dump_printf(": unhandled!\n"); 189 return 0; 190 } 191 192 static int process_event_stub(struct perf_tool *tool __maybe_unused, 193 union perf_event *event __maybe_unused, 194 struct perf_sample *sample __maybe_unused, 195 struct machine *machine __maybe_unused) 196 { 197 dump_printf(": unhandled!\n"); 198 return 0; 199 } 200 201 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused, 202 union perf_event *event __maybe_unused, 203 struct perf_session *perf_session 204 __maybe_unused) 205 { 206 dump_printf(": unhandled!\n"); 207 return 0; 208 } 209 210 static int process_finished_round(struct perf_tool *tool, 211 union perf_event *event, 212 struct perf_session *session); 213 214 void perf_tool__fill_defaults(struct perf_tool *tool) 215 { 216 if (tool->sample == NULL) 217 tool->sample = process_event_sample_stub; 218 if (tool->mmap == NULL) 219 tool->mmap = process_event_stub; 220 if (tool->mmap2 == NULL) 221 tool->mmap2 = process_event_stub; 222 if (tool->comm == NULL) 223 tool->comm = process_event_stub; 224 if (tool->fork == NULL) 225 tool->fork = process_event_stub; 226 if (tool->exit == NULL) 227 tool->exit = process_event_stub; 228 if (tool->lost == NULL) 229 tool->lost = perf_event__process_lost; 230 if (tool->read == NULL) 231 tool->read = process_event_sample_stub; 232 if (tool->throttle == NULL) 233 tool->throttle = process_event_stub; 234 if (tool->unthrottle == NULL) 235 tool->unthrottle = process_event_stub; 236 if (tool->attr == NULL) 237 tool->attr = process_event_synth_attr_stub; 238 if (tool->tracing_data == NULL) 239 tool->tracing_data = process_event_synth_tracing_data_stub; 240 if (tool->build_id == NULL) 241 tool->build_id = process_finished_round_stub; 242 if (tool->finished_round == NULL) { 243 if (tool->ordered_samples) 244 tool->finished_round = process_finished_round; 245 else 246 tool->finished_round = process_finished_round_stub; 247 } 248 } 249 250 void mem_bswap_32(void *src, int byte_size) 251 { 252 u32 *m = src; 253 while (byte_size > 0) { 254 *m = bswap_32(*m); 255 byte_size -= sizeof(u32); 256 ++m; 257 } 258 } 259 260 void mem_bswap_64(void *src, int byte_size) 261 { 262 u64 *m = src; 263 264 while (byte_size > 0) { 265 *m = bswap_64(*m); 266 byte_size -= sizeof(u64); 267 ++m; 268 } 269 } 270 271 static void swap_sample_id_all(union perf_event *event, void *data) 272 { 273 void *end = (void *) event + event->header.size; 274 int size = end - data; 275 276 BUG_ON(size % sizeof(u64)); 277 mem_bswap_64(data, size); 278 } 279 280 static void perf_event__all64_swap(union perf_event *event, 281 bool sample_id_all __maybe_unused) 282 { 283 struct perf_event_header *hdr = &event->header; 284 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 285 } 286 287 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 288 { 289 event->comm.pid = bswap_32(event->comm.pid); 290 event->comm.tid = bswap_32(event->comm.tid); 291 292 if (sample_id_all) { 293 void *data = &event->comm.comm; 294 295 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 296 swap_sample_id_all(event, data); 297 } 298 } 299 300 static void perf_event__mmap_swap(union perf_event *event, 301 bool sample_id_all) 302 { 303 event->mmap.pid = bswap_32(event->mmap.pid); 304 event->mmap.tid = bswap_32(event->mmap.tid); 305 event->mmap.start = bswap_64(event->mmap.start); 306 event->mmap.len = bswap_64(event->mmap.len); 307 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 308 309 if (sample_id_all) { 310 void *data = &event->mmap.filename; 311 312 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 313 swap_sample_id_all(event, data); 314 } 315 } 316 317 static void perf_event__mmap2_swap(union perf_event *event, 318 bool sample_id_all) 319 { 320 event->mmap2.pid = bswap_32(event->mmap2.pid); 321 event->mmap2.tid = bswap_32(event->mmap2.tid); 322 event->mmap2.start = bswap_64(event->mmap2.start); 323 event->mmap2.len = bswap_64(event->mmap2.len); 324 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); 325 event->mmap2.maj = bswap_32(event->mmap2.maj); 326 event->mmap2.min = bswap_32(event->mmap2.min); 327 event->mmap2.ino = bswap_64(event->mmap2.ino); 328 329 if (sample_id_all) { 330 void *data = &event->mmap2.filename; 331 332 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 333 swap_sample_id_all(event, data); 334 } 335 } 336 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 337 { 338 event->fork.pid = bswap_32(event->fork.pid); 339 event->fork.tid = bswap_32(event->fork.tid); 340 event->fork.ppid = bswap_32(event->fork.ppid); 341 event->fork.ptid = bswap_32(event->fork.ptid); 342 event->fork.time = bswap_64(event->fork.time); 343 344 if (sample_id_all) 345 swap_sample_id_all(event, &event->fork + 1); 346 } 347 348 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 349 { 350 event->read.pid = bswap_32(event->read.pid); 351 event->read.tid = bswap_32(event->read.tid); 352 event->read.value = bswap_64(event->read.value); 353 event->read.time_enabled = bswap_64(event->read.time_enabled); 354 event->read.time_running = bswap_64(event->read.time_running); 355 event->read.id = bswap_64(event->read.id); 356 357 if (sample_id_all) 358 swap_sample_id_all(event, &event->read + 1); 359 } 360 361 static void perf_event__throttle_swap(union perf_event *event, 362 bool sample_id_all) 363 { 364 event->throttle.time = bswap_64(event->throttle.time); 365 event->throttle.id = bswap_64(event->throttle.id); 366 event->throttle.stream_id = bswap_64(event->throttle.stream_id); 367 368 if (sample_id_all) 369 swap_sample_id_all(event, &event->throttle + 1); 370 } 371 372 static u8 revbyte(u8 b) 373 { 374 int rev = (b >> 4) | ((b & 0xf) << 4); 375 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 376 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 377 return (u8) rev; 378 } 379 380 /* 381 * XXX this is hack in attempt to carry flags bitfield 382 * throught endian village. ABI says: 383 * 384 * Bit-fields are allocated from right to left (least to most significant) 385 * on little-endian implementations and from left to right (most to least 386 * significant) on big-endian implementations. 387 * 388 * The above seems to be byte specific, so we need to reverse each 389 * byte of the bitfield. 'Internet' also says this might be implementation 390 * specific and we probably need proper fix and carry perf_event_attr 391 * bitfield flags in separate data file FEAT_ section. Thought this seems 392 * to work for now. 393 */ 394 static void swap_bitfield(u8 *p, unsigned len) 395 { 396 unsigned i; 397 398 for (i = 0; i < len; i++) { 399 *p = revbyte(*p); 400 p++; 401 } 402 } 403 404 /* exported for swapping attributes in file header */ 405 void perf_event__attr_swap(struct perf_event_attr *attr) 406 { 407 attr->type = bswap_32(attr->type); 408 attr->size = bswap_32(attr->size); 409 attr->config = bswap_64(attr->config); 410 attr->sample_period = bswap_64(attr->sample_period); 411 attr->sample_type = bswap_64(attr->sample_type); 412 attr->read_format = bswap_64(attr->read_format); 413 attr->wakeup_events = bswap_32(attr->wakeup_events); 414 attr->bp_type = bswap_32(attr->bp_type); 415 attr->bp_addr = bswap_64(attr->bp_addr); 416 attr->bp_len = bswap_64(attr->bp_len); 417 attr->branch_sample_type = bswap_64(attr->branch_sample_type); 418 attr->sample_regs_user = bswap_64(attr->sample_regs_user); 419 attr->sample_stack_user = bswap_32(attr->sample_stack_user); 420 421 swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64)); 422 } 423 424 static void perf_event__hdr_attr_swap(union perf_event *event, 425 bool sample_id_all __maybe_unused) 426 { 427 size_t size; 428 429 perf_event__attr_swap(&event->attr.attr); 430 431 size = event->header.size; 432 size -= (void *)&event->attr.id - (void *)event; 433 mem_bswap_64(event->attr.id, size); 434 } 435 436 static void perf_event__event_type_swap(union perf_event *event, 437 bool sample_id_all __maybe_unused) 438 { 439 event->event_type.event_type.event_id = 440 bswap_64(event->event_type.event_type.event_id); 441 } 442 443 static void perf_event__tracing_data_swap(union perf_event *event, 444 bool sample_id_all __maybe_unused) 445 { 446 event->tracing_data.size = bswap_32(event->tracing_data.size); 447 } 448 449 typedef void (*perf_event__swap_op)(union perf_event *event, 450 bool sample_id_all); 451 452 static perf_event__swap_op perf_event__swap_ops[] = { 453 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 454 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap, 455 [PERF_RECORD_COMM] = perf_event__comm_swap, 456 [PERF_RECORD_FORK] = perf_event__task_swap, 457 [PERF_RECORD_EXIT] = perf_event__task_swap, 458 [PERF_RECORD_LOST] = perf_event__all64_swap, 459 [PERF_RECORD_READ] = perf_event__read_swap, 460 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap, 461 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap, 462 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 463 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 464 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 465 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 466 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 467 [PERF_RECORD_HEADER_MAX] = NULL, 468 }; 469 470 struct sample_queue { 471 u64 timestamp; 472 u64 file_offset; 473 union perf_event *event; 474 struct list_head list; 475 }; 476 477 static void perf_session_free_sample_buffers(struct perf_session *session) 478 { 479 struct ordered_samples *os = &session->ordered_samples; 480 481 while (!list_empty(&os->to_free)) { 482 struct sample_queue *sq; 483 484 sq = list_entry(os->to_free.next, struct sample_queue, list); 485 list_del(&sq->list); 486 free(sq); 487 } 488 } 489 490 static int perf_session_deliver_event(struct perf_session *session, 491 union perf_event *event, 492 struct perf_sample *sample, 493 struct perf_tool *tool, 494 u64 file_offset); 495 496 static int flush_sample_queue(struct perf_session *s, 497 struct perf_tool *tool) 498 { 499 struct ordered_samples *os = &s->ordered_samples; 500 struct list_head *head = &os->samples; 501 struct sample_queue *tmp, *iter; 502 struct perf_sample sample; 503 u64 limit = os->next_flush; 504 u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL; 505 bool show_progress = limit == ULLONG_MAX; 506 struct ui_progress prog; 507 int ret; 508 509 if (!tool->ordered_samples || !limit) 510 return 0; 511 512 if (show_progress) 513 ui_progress__init(&prog, os->nr_samples, "Processing time ordered events..."); 514 515 list_for_each_entry_safe(iter, tmp, head, list) { 516 if (session_done()) 517 return 0; 518 519 if (iter->timestamp > limit) 520 break; 521 522 ret = perf_evlist__parse_sample(s->evlist, iter->event, &sample); 523 if (ret) 524 pr_err("Can't parse sample, err = %d\n", ret); 525 else { 526 ret = perf_session_deliver_event(s, iter->event, &sample, tool, 527 iter->file_offset); 528 if (ret) 529 return ret; 530 } 531 532 os->last_flush = iter->timestamp; 533 list_del(&iter->list); 534 list_add(&iter->list, &os->sample_cache); 535 536 if (show_progress) 537 ui_progress__update(&prog, 1); 538 } 539 540 if (list_empty(head)) { 541 os->last_sample = NULL; 542 } else if (last_ts <= limit) { 543 os->last_sample = 544 list_entry(head->prev, struct sample_queue, list); 545 } 546 547 os->nr_samples = 0; 548 549 return 0; 550 } 551 552 /* 553 * When perf record finishes a pass on every buffers, it records this pseudo 554 * event. 555 * We record the max timestamp t found in the pass n. 556 * Assuming these timestamps are monotonic across cpus, we know that if 557 * a buffer still has events with timestamps below t, they will be all 558 * available and then read in the pass n + 1. 559 * Hence when we start to read the pass n + 2, we can safely flush every 560 * events with timestamps below t. 561 * 562 * ============ PASS n ================= 563 * CPU 0 | CPU 1 564 * | 565 * cnt1 timestamps | cnt2 timestamps 566 * 1 | 2 567 * 2 | 3 568 * - | 4 <--- max recorded 569 * 570 * ============ PASS n + 1 ============== 571 * CPU 0 | CPU 1 572 * | 573 * cnt1 timestamps | cnt2 timestamps 574 * 3 | 5 575 * 4 | 6 576 * 5 | 7 <---- max recorded 577 * 578 * Flush every events below timestamp 4 579 * 580 * ============ PASS n + 2 ============== 581 * CPU 0 | CPU 1 582 * | 583 * cnt1 timestamps | cnt2 timestamps 584 * 6 | 8 585 * 7 | 9 586 * - | 10 587 * 588 * Flush every events below timestamp 7 589 * etc... 590 */ 591 static int process_finished_round(struct perf_tool *tool, 592 union perf_event *event __maybe_unused, 593 struct perf_session *session) 594 { 595 int ret = flush_sample_queue(session, tool); 596 if (!ret) 597 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp; 598 599 return ret; 600 } 601 602 /* The queue is ordered by time */ 603 static void __queue_event(struct sample_queue *new, struct perf_session *s) 604 { 605 struct ordered_samples *os = &s->ordered_samples; 606 struct sample_queue *sample = os->last_sample; 607 u64 timestamp = new->timestamp; 608 struct list_head *p; 609 610 ++os->nr_samples; 611 os->last_sample = new; 612 613 if (!sample) { 614 list_add(&new->list, &os->samples); 615 os->max_timestamp = timestamp; 616 return; 617 } 618 619 /* 620 * last_sample might point to some random place in the list as it's 621 * the last queued event. We expect that the new event is close to 622 * this. 623 */ 624 if (sample->timestamp <= timestamp) { 625 while (sample->timestamp <= timestamp) { 626 p = sample->list.next; 627 if (p == &os->samples) { 628 list_add_tail(&new->list, &os->samples); 629 os->max_timestamp = timestamp; 630 return; 631 } 632 sample = list_entry(p, struct sample_queue, list); 633 } 634 list_add_tail(&new->list, &sample->list); 635 } else { 636 while (sample->timestamp > timestamp) { 637 p = sample->list.prev; 638 if (p == &os->samples) { 639 list_add(&new->list, &os->samples); 640 return; 641 } 642 sample = list_entry(p, struct sample_queue, list); 643 } 644 list_add(&new->list, &sample->list); 645 } 646 } 647 648 #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue)) 649 650 int perf_session_queue_event(struct perf_session *s, union perf_event *event, 651 struct perf_sample *sample, u64 file_offset) 652 { 653 struct ordered_samples *os = &s->ordered_samples; 654 struct list_head *sc = &os->sample_cache; 655 u64 timestamp = sample->time; 656 struct sample_queue *new; 657 658 if (!timestamp || timestamp == ~0ULL) 659 return -ETIME; 660 661 if (timestamp < s->ordered_samples.last_flush) { 662 printf("Warning: Timestamp below last timeslice flush\n"); 663 return -EINVAL; 664 } 665 666 if (!list_empty(sc)) { 667 new = list_entry(sc->next, struct sample_queue, list); 668 list_del(&new->list); 669 } else if (os->sample_buffer) { 670 new = os->sample_buffer + os->sample_buffer_idx; 671 if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER) 672 os->sample_buffer = NULL; 673 } else { 674 os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new)); 675 if (!os->sample_buffer) 676 return -ENOMEM; 677 list_add(&os->sample_buffer->list, &os->to_free); 678 os->sample_buffer_idx = 2; 679 new = os->sample_buffer + 1; 680 } 681 682 new->timestamp = timestamp; 683 new->file_offset = file_offset; 684 new->event = event; 685 686 __queue_event(new, s); 687 688 return 0; 689 } 690 691 static void callchain__printf(struct perf_sample *sample) 692 { 693 unsigned int i; 694 695 printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr); 696 697 for (i = 0; i < sample->callchain->nr; i++) 698 printf("..... %2d: %016" PRIx64 "\n", 699 i, sample->callchain->ips[i]); 700 } 701 702 static void branch_stack__printf(struct perf_sample *sample) 703 { 704 uint64_t i; 705 706 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr); 707 708 for (i = 0; i < sample->branch_stack->nr; i++) 709 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n", 710 i, sample->branch_stack->entries[i].from, 711 sample->branch_stack->entries[i].to); 712 } 713 714 static void regs_dump__printf(u64 mask, u64 *regs) 715 { 716 unsigned rid, i = 0; 717 718 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { 719 u64 val = regs[i++]; 720 721 printf(".... %-5s 0x%" PRIx64 "\n", 722 perf_reg_name(rid), val); 723 } 724 } 725 726 static void regs_user__printf(struct perf_sample *sample, u64 mask) 727 { 728 struct regs_dump *user_regs = &sample->user_regs; 729 730 if (user_regs->regs) { 731 printf("... user regs: mask 0x%" PRIx64 "\n", mask); 732 regs_dump__printf(mask, user_regs->regs); 733 } 734 } 735 736 static void stack_user__printf(struct stack_dump *dump) 737 { 738 printf("... ustack: size %" PRIu64 ", offset 0x%x\n", 739 dump->size, dump->offset); 740 } 741 742 static void perf_session__print_tstamp(struct perf_session *session, 743 union perf_event *event, 744 struct perf_sample *sample) 745 { 746 u64 sample_type = __perf_evlist__combined_sample_type(session->evlist); 747 748 if (event->header.type != PERF_RECORD_SAMPLE && 749 !perf_evlist__sample_id_all(session->evlist)) { 750 fputs("-1 -1 ", stdout); 751 return; 752 } 753 754 if ((sample_type & PERF_SAMPLE_CPU)) 755 printf("%u ", sample->cpu); 756 757 if (sample_type & PERF_SAMPLE_TIME) 758 printf("%" PRIu64 " ", sample->time); 759 } 760 761 static void sample_read__printf(struct perf_sample *sample, u64 read_format) 762 { 763 printf("... sample_read:\n"); 764 765 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 766 printf("...... time enabled %016" PRIx64 "\n", 767 sample->read.time_enabled); 768 769 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 770 printf("...... time running %016" PRIx64 "\n", 771 sample->read.time_running); 772 773 if (read_format & PERF_FORMAT_GROUP) { 774 u64 i; 775 776 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr); 777 778 for (i = 0; i < sample->read.group.nr; i++) { 779 struct sample_read_value *value; 780 781 value = &sample->read.group.values[i]; 782 printf("..... id %016" PRIx64 783 ", value %016" PRIx64 "\n", 784 value->id, value->value); 785 } 786 } else 787 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n", 788 sample->read.one.id, sample->read.one.value); 789 } 790 791 static void dump_event(struct perf_session *session, union perf_event *event, 792 u64 file_offset, struct perf_sample *sample) 793 { 794 if (!dump_trace) 795 return; 796 797 printf("\n%#" PRIx64 " [%#x]: event: %d\n", 798 file_offset, event->header.size, event->header.type); 799 800 trace_event(event); 801 802 if (sample) 803 perf_session__print_tstamp(session, event, sample); 804 805 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 806 event->header.size, perf_event__name(event->header.type)); 807 } 808 809 static void dump_sample(struct perf_evsel *evsel, union perf_event *event, 810 struct perf_sample *sample) 811 { 812 u64 sample_type; 813 814 if (!dump_trace) 815 return; 816 817 printf("(IP, %d): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 818 event->header.misc, sample->pid, sample->tid, sample->ip, 819 sample->period, sample->addr); 820 821 sample_type = evsel->attr.sample_type; 822 823 if (sample_type & PERF_SAMPLE_CALLCHAIN) 824 callchain__printf(sample); 825 826 if (sample_type & PERF_SAMPLE_BRANCH_STACK) 827 branch_stack__printf(sample); 828 829 if (sample_type & PERF_SAMPLE_REGS_USER) 830 regs_user__printf(sample, evsel->attr.sample_regs_user); 831 832 if (sample_type & PERF_SAMPLE_STACK_USER) 833 stack_user__printf(&sample->user_stack); 834 835 if (sample_type & PERF_SAMPLE_WEIGHT) 836 printf("... weight: %" PRIu64 "\n", sample->weight); 837 838 if (sample_type & PERF_SAMPLE_DATA_SRC) 839 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src); 840 841 if (sample_type & PERF_SAMPLE_TRANSACTION) 842 printf("... transaction: %" PRIx64 "\n", sample->transaction); 843 844 if (sample_type & PERF_SAMPLE_READ) 845 sample_read__printf(sample, evsel->attr.read_format); 846 } 847 848 static struct machine * 849 perf_session__find_machine_for_cpumode(struct perf_session *session, 850 union perf_event *event, 851 struct perf_sample *sample) 852 { 853 const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 854 855 if (perf_guest && 856 ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 857 (cpumode == PERF_RECORD_MISC_GUEST_USER))) { 858 u32 pid; 859 860 if (event->header.type == PERF_RECORD_MMAP 861 || event->header.type == PERF_RECORD_MMAP2) 862 pid = event->mmap.pid; 863 else 864 pid = sample->pid; 865 866 return perf_session__findnew_machine(session, pid); 867 } 868 869 return &session->machines.host; 870 } 871 872 static int deliver_sample_value(struct perf_session *session, 873 struct perf_tool *tool, 874 union perf_event *event, 875 struct perf_sample *sample, 876 struct sample_read_value *v, 877 struct machine *machine) 878 { 879 struct perf_sample_id *sid; 880 881 sid = perf_evlist__id2sid(session->evlist, v->id); 882 if (sid) { 883 sample->id = v->id; 884 sample->period = v->value - sid->period; 885 sid->period = v->value; 886 } 887 888 if (!sid || sid->evsel == NULL) { 889 ++session->stats.nr_unknown_id; 890 return 0; 891 } 892 893 return tool->sample(tool, event, sample, sid->evsel, machine); 894 } 895 896 static int deliver_sample_group(struct perf_session *session, 897 struct perf_tool *tool, 898 union perf_event *event, 899 struct perf_sample *sample, 900 struct machine *machine) 901 { 902 int ret = -EINVAL; 903 u64 i; 904 905 for (i = 0; i < sample->read.group.nr; i++) { 906 ret = deliver_sample_value(session, tool, event, sample, 907 &sample->read.group.values[i], 908 machine); 909 if (ret) 910 break; 911 } 912 913 return ret; 914 } 915 916 static int 917 perf_session__deliver_sample(struct perf_session *session, 918 struct perf_tool *tool, 919 union perf_event *event, 920 struct perf_sample *sample, 921 struct perf_evsel *evsel, 922 struct machine *machine) 923 { 924 /* We know evsel != NULL. */ 925 u64 sample_type = evsel->attr.sample_type; 926 u64 read_format = evsel->attr.read_format; 927 928 /* Standard sample delievery. */ 929 if (!(sample_type & PERF_SAMPLE_READ)) 930 return tool->sample(tool, event, sample, evsel, machine); 931 932 /* For PERF_SAMPLE_READ we have either single or group mode. */ 933 if (read_format & PERF_FORMAT_GROUP) 934 return deliver_sample_group(session, tool, event, sample, 935 machine); 936 else 937 return deliver_sample_value(session, tool, event, sample, 938 &sample->read.one, machine); 939 } 940 941 static int perf_session_deliver_event(struct perf_session *session, 942 union perf_event *event, 943 struct perf_sample *sample, 944 struct perf_tool *tool, 945 u64 file_offset) 946 { 947 struct perf_evsel *evsel; 948 struct machine *machine; 949 950 dump_event(session, event, file_offset, sample); 951 952 evsel = perf_evlist__id2evsel(session->evlist, sample->id); 953 if (evsel != NULL && event->header.type != PERF_RECORD_SAMPLE) { 954 /* 955 * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here 956 * because the tools right now may apply filters, discarding 957 * some of the samples. For consistency, in the future we 958 * should have something like nr_filtered_samples and remove 959 * the sample->period from total_sample_period, etc, KISS for 960 * now tho. 961 * 962 * Also testing against NULL allows us to handle files without 963 * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the 964 * future probably it'll be a good idea to restrict event 965 * processing via perf_session to files with both set. 966 */ 967 hists__inc_nr_events(&evsel->hists, event->header.type); 968 } 969 970 machine = perf_session__find_machine_for_cpumode(session, event, 971 sample); 972 973 switch (event->header.type) { 974 case PERF_RECORD_SAMPLE: 975 dump_sample(evsel, event, sample); 976 if (evsel == NULL) { 977 ++session->stats.nr_unknown_id; 978 return 0; 979 } 980 if (machine == NULL) { 981 ++session->stats.nr_unprocessable_samples; 982 return 0; 983 } 984 return perf_session__deliver_sample(session, tool, event, 985 sample, evsel, machine); 986 case PERF_RECORD_MMAP: 987 return tool->mmap(tool, event, sample, machine); 988 case PERF_RECORD_MMAP2: 989 return tool->mmap2(tool, event, sample, machine); 990 case PERF_RECORD_COMM: 991 return tool->comm(tool, event, sample, machine); 992 case PERF_RECORD_FORK: 993 return tool->fork(tool, event, sample, machine); 994 case PERF_RECORD_EXIT: 995 return tool->exit(tool, event, sample, machine); 996 case PERF_RECORD_LOST: 997 if (tool->lost == perf_event__process_lost) 998 session->stats.total_lost += event->lost.lost; 999 return tool->lost(tool, event, sample, machine); 1000 case PERF_RECORD_READ: 1001 return tool->read(tool, event, sample, evsel, machine); 1002 case PERF_RECORD_THROTTLE: 1003 return tool->throttle(tool, event, sample, machine); 1004 case PERF_RECORD_UNTHROTTLE: 1005 return tool->unthrottle(tool, event, sample, machine); 1006 default: 1007 ++session->stats.nr_unknown_events; 1008 return -1; 1009 } 1010 } 1011 1012 static int perf_session__process_user_event(struct perf_session *session, union perf_event *event, 1013 struct perf_tool *tool, u64 file_offset) 1014 { 1015 int fd = perf_data_file__fd(session->file); 1016 int err; 1017 1018 dump_event(session, event, file_offset, NULL); 1019 1020 /* These events are processed right away */ 1021 switch (event->header.type) { 1022 case PERF_RECORD_HEADER_ATTR: 1023 err = tool->attr(tool, event, &session->evlist); 1024 if (err == 0) 1025 perf_session__set_id_hdr_size(session); 1026 return err; 1027 case PERF_RECORD_HEADER_TRACING_DATA: 1028 /* setup for reading amidst mmap */ 1029 lseek(fd, file_offset, SEEK_SET); 1030 return tool->tracing_data(tool, event, session); 1031 case PERF_RECORD_HEADER_BUILD_ID: 1032 return tool->build_id(tool, event, session); 1033 case PERF_RECORD_FINISHED_ROUND: 1034 return tool->finished_round(tool, event, session); 1035 default: 1036 return -EINVAL; 1037 } 1038 } 1039 1040 static void event_swap(union perf_event *event, bool sample_id_all) 1041 { 1042 perf_event__swap_op swap; 1043 1044 swap = perf_event__swap_ops[event->header.type]; 1045 if (swap) 1046 swap(event, sample_id_all); 1047 } 1048 1049 static int perf_session__process_event(struct perf_session *session, 1050 union perf_event *event, 1051 struct perf_tool *tool, 1052 u64 file_offset) 1053 { 1054 struct perf_sample sample; 1055 int ret; 1056 1057 if (session->header.needs_swap) 1058 event_swap(event, perf_evlist__sample_id_all(session->evlist)); 1059 1060 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1061 return -EINVAL; 1062 1063 events_stats__inc(&session->stats, event->header.type); 1064 1065 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1066 return perf_session__process_user_event(session, event, tool, file_offset); 1067 1068 /* 1069 * For all kernel events we get the sample data 1070 */ 1071 ret = perf_evlist__parse_sample(session->evlist, event, &sample); 1072 if (ret) 1073 return ret; 1074 1075 if (tool->ordered_samples) { 1076 ret = perf_session_queue_event(session, event, &sample, 1077 file_offset); 1078 if (ret != -ETIME) 1079 return ret; 1080 } 1081 1082 return perf_session_deliver_event(session, event, &sample, tool, 1083 file_offset); 1084 } 1085 1086 void perf_event_header__bswap(struct perf_event_header *hdr) 1087 { 1088 hdr->type = bswap_32(hdr->type); 1089 hdr->misc = bswap_16(hdr->misc); 1090 hdr->size = bswap_16(hdr->size); 1091 } 1092 1093 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1094 { 1095 return machine__findnew_thread(&session->machines.host, 0, pid); 1096 } 1097 1098 static struct thread *perf_session__register_idle_thread(struct perf_session *session) 1099 { 1100 struct thread *thread = perf_session__findnew(session, 0); 1101 1102 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) { 1103 pr_err("problem inserting idle task.\n"); 1104 thread = NULL; 1105 } 1106 1107 return thread; 1108 } 1109 1110 static void perf_session__warn_about_errors(const struct perf_session *session, 1111 const struct perf_tool *tool) 1112 { 1113 if (tool->lost == perf_event__process_lost && 1114 session->stats.nr_events[PERF_RECORD_LOST] != 0) { 1115 ui__warning("Processed %d events and lost %d chunks!\n\n" 1116 "Check IO/CPU overload!\n\n", 1117 session->stats.nr_events[0], 1118 session->stats.nr_events[PERF_RECORD_LOST]); 1119 } 1120 1121 if (session->stats.nr_unknown_events != 0) { 1122 ui__warning("Found %u unknown events!\n\n" 1123 "Is this an older tool processing a perf.data " 1124 "file generated by a more recent tool?\n\n" 1125 "If that is not the case, consider " 1126 "reporting to linux-kernel@vger.kernel.org.\n\n", 1127 session->stats.nr_unknown_events); 1128 } 1129 1130 if (session->stats.nr_unknown_id != 0) { 1131 ui__warning("%u samples with id not present in the header\n", 1132 session->stats.nr_unknown_id); 1133 } 1134 1135 if (session->stats.nr_invalid_chains != 0) { 1136 ui__warning("Found invalid callchains!\n\n" 1137 "%u out of %u events were discarded for this reason.\n\n" 1138 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1139 session->stats.nr_invalid_chains, 1140 session->stats.nr_events[PERF_RECORD_SAMPLE]); 1141 } 1142 1143 if (session->stats.nr_unprocessable_samples != 0) { 1144 ui__warning("%u unprocessable samples recorded.\n" 1145 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1146 session->stats.nr_unprocessable_samples); 1147 } 1148 } 1149 1150 volatile int session_done; 1151 1152 static int __perf_session__process_pipe_events(struct perf_session *session, 1153 struct perf_tool *tool) 1154 { 1155 int fd = perf_data_file__fd(session->file); 1156 union perf_event *event; 1157 uint32_t size, cur_size = 0; 1158 void *buf = NULL; 1159 int skip = 0; 1160 u64 head; 1161 ssize_t err; 1162 void *p; 1163 1164 perf_tool__fill_defaults(tool); 1165 1166 head = 0; 1167 cur_size = sizeof(union perf_event); 1168 1169 buf = malloc(cur_size); 1170 if (!buf) 1171 return -errno; 1172 more: 1173 event = buf; 1174 err = readn(fd, event, sizeof(struct perf_event_header)); 1175 if (err <= 0) { 1176 if (err == 0) 1177 goto done; 1178 1179 pr_err("failed to read event header\n"); 1180 goto out_err; 1181 } 1182 1183 if (session->header.needs_swap) 1184 perf_event_header__bswap(&event->header); 1185 1186 size = event->header.size; 1187 if (size < sizeof(struct perf_event_header)) { 1188 pr_err("bad event header size\n"); 1189 goto out_err; 1190 } 1191 1192 if (size > cur_size) { 1193 void *new = realloc(buf, size); 1194 if (!new) { 1195 pr_err("failed to allocate memory to read event\n"); 1196 goto out_err; 1197 } 1198 buf = new; 1199 cur_size = size; 1200 event = buf; 1201 } 1202 p = event; 1203 p += sizeof(struct perf_event_header); 1204 1205 if (size - sizeof(struct perf_event_header)) { 1206 err = readn(fd, p, size - sizeof(struct perf_event_header)); 1207 if (err <= 0) { 1208 if (err == 0) { 1209 pr_err("unexpected end of event stream\n"); 1210 goto done; 1211 } 1212 1213 pr_err("failed to read event data\n"); 1214 goto out_err; 1215 } 1216 } 1217 1218 if ((skip = perf_session__process_event(session, event, tool, head)) < 0) { 1219 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1220 head, event->header.size, event->header.type); 1221 err = -EINVAL; 1222 goto out_err; 1223 } 1224 1225 head += size; 1226 1227 if (skip > 0) 1228 head += skip; 1229 1230 if (!session_done()) 1231 goto more; 1232 done: 1233 /* do the final flush for ordered samples */ 1234 session->ordered_samples.next_flush = ULLONG_MAX; 1235 err = flush_sample_queue(session, tool); 1236 out_err: 1237 free(buf); 1238 perf_session__warn_about_errors(session, tool); 1239 perf_session_free_sample_buffers(session); 1240 return err; 1241 } 1242 1243 static union perf_event * 1244 fetch_mmaped_event(struct perf_session *session, 1245 u64 head, size_t mmap_size, char *buf) 1246 { 1247 union perf_event *event; 1248 1249 /* 1250 * Ensure we have enough space remaining to read 1251 * the size of the event in the headers. 1252 */ 1253 if (head + sizeof(event->header) > mmap_size) 1254 return NULL; 1255 1256 event = (union perf_event *)(buf + head); 1257 1258 if (session->header.needs_swap) 1259 perf_event_header__bswap(&event->header); 1260 1261 if (head + event->header.size > mmap_size) { 1262 /* We're not fetching the event so swap back again */ 1263 if (session->header.needs_swap) 1264 perf_event_header__bswap(&event->header); 1265 return NULL; 1266 } 1267 1268 return event; 1269 } 1270 1271 /* 1272 * On 64bit we can mmap the data file in one go. No need for tiny mmap 1273 * slices. On 32bit we use 32MB. 1274 */ 1275 #if BITS_PER_LONG == 64 1276 #define MMAP_SIZE ULLONG_MAX 1277 #define NUM_MMAPS 1 1278 #else 1279 #define MMAP_SIZE (32 * 1024 * 1024ULL) 1280 #define NUM_MMAPS 128 1281 #endif 1282 1283 int __perf_session__process_events(struct perf_session *session, 1284 u64 data_offset, u64 data_size, 1285 u64 file_size, struct perf_tool *tool) 1286 { 1287 int fd = perf_data_file__fd(session->file); 1288 u64 head, page_offset, file_offset, file_pos; 1289 int err, mmap_prot, mmap_flags, map_idx = 0; 1290 size_t mmap_size; 1291 char *buf, *mmaps[NUM_MMAPS]; 1292 union perf_event *event; 1293 uint32_t size; 1294 struct ui_progress prog; 1295 1296 perf_tool__fill_defaults(tool); 1297 1298 page_offset = page_size * (data_offset / page_size); 1299 file_offset = page_offset; 1300 head = data_offset - page_offset; 1301 1302 if (data_size && (data_offset + data_size < file_size)) 1303 file_size = data_offset + data_size; 1304 1305 ui_progress__init(&prog, file_size, "Processing events..."); 1306 1307 mmap_size = MMAP_SIZE; 1308 if (mmap_size > file_size) 1309 mmap_size = file_size; 1310 1311 memset(mmaps, 0, sizeof(mmaps)); 1312 1313 mmap_prot = PROT_READ; 1314 mmap_flags = MAP_SHARED; 1315 1316 if (session->header.needs_swap) { 1317 mmap_prot |= PROT_WRITE; 1318 mmap_flags = MAP_PRIVATE; 1319 } 1320 remap: 1321 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd, 1322 file_offset); 1323 if (buf == MAP_FAILED) { 1324 pr_err("failed to mmap file\n"); 1325 err = -errno; 1326 goto out_err; 1327 } 1328 mmaps[map_idx] = buf; 1329 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 1330 file_pos = file_offset + head; 1331 1332 more: 1333 event = fetch_mmaped_event(session, head, mmap_size, buf); 1334 if (!event) { 1335 if (mmaps[map_idx]) { 1336 munmap(mmaps[map_idx], mmap_size); 1337 mmaps[map_idx] = NULL; 1338 } 1339 1340 page_offset = page_size * (head / page_size); 1341 file_offset += page_offset; 1342 head -= page_offset; 1343 goto remap; 1344 } 1345 1346 size = event->header.size; 1347 1348 if (size < sizeof(struct perf_event_header) || 1349 perf_session__process_event(session, event, tool, file_pos) < 0) { 1350 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1351 file_offset + head, event->header.size, 1352 event->header.type); 1353 err = -EINVAL; 1354 goto out_err; 1355 } 1356 1357 head += size; 1358 file_pos += size; 1359 1360 ui_progress__update(&prog, size); 1361 1362 if (session_done()) 1363 goto out; 1364 1365 if (file_pos < file_size) 1366 goto more; 1367 1368 out: 1369 /* do the final flush for ordered samples */ 1370 session->ordered_samples.next_flush = ULLONG_MAX; 1371 err = flush_sample_queue(session, tool); 1372 out_err: 1373 ui_progress__finish(); 1374 perf_session__warn_about_errors(session, tool); 1375 perf_session_free_sample_buffers(session); 1376 return err; 1377 } 1378 1379 int perf_session__process_events(struct perf_session *session, 1380 struct perf_tool *tool) 1381 { 1382 u64 size = perf_data_file__size(session->file); 1383 int err; 1384 1385 if (perf_session__register_idle_thread(session) == NULL) 1386 return -ENOMEM; 1387 1388 if (!perf_data_file__is_pipe(session->file)) 1389 err = __perf_session__process_events(session, 1390 session->header.data_offset, 1391 session->header.data_size, 1392 size, tool); 1393 else 1394 err = __perf_session__process_pipe_events(session, tool); 1395 1396 return err; 1397 } 1398 1399 bool perf_session__has_traces(struct perf_session *session, const char *msg) 1400 { 1401 struct perf_evsel *evsel; 1402 1403 list_for_each_entry(evsel, &session->evlist->entries, node) { 1404 if (evsel->attr.type == PERF_TYPE_TRACEPOINT) 1405 return true; 1406 } 1407 1408 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 1409 return false; 1410 } 1411 1412 int maps__set_kallsyms_ref_reloc_sym(struct map **maps, 1413 const char *symbol_name, u64 addr) 1414 { 1415 char *bracket; 1416 enum map_type i; 1417 struct ref_reloc_sym *ref; 1418 1419 ref = zalloc(sizeof(struct ref_reloc_sym)); 1420 if (ref == NULL) 1421 return -ENOMEM; 1422 1423 ref->name = strdup(symbol_name); 1424 if (ref->name == NULL) { 1425 free(ref); 1426 return -ENOMEM; 1427 } 1428 1429 bracket = strchr(ref->name, ']'); 1430 if (bracket) 1431 *bracket = '\0'; 1432 1433 ref->addr = addr; 1434 1435 for (i = 0; i < MAP__NR_TYPES; ++i) { 1436 struct kmap *kmap = map__kmap(maps[i]); 1437 kmap->ref_reloc_sym = ref; 1438 } 1439 1440 return 0; 1441 } 1442 1443 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp) 1444 { 1445 return machines__fprintf_dsos(&session->machines, fp); 1446 } 1447 1448 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp, 1449 bool (skip)(struct dso *dso, int parm), int parm) 1450 { 1451 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm); 1452 } 1453 1454 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 1455 { 1456 struct perf_evsel *pos; 1457 size_t ret = fprintf(fp, "Aggregated stats:\n"); 1458 1459 ret += events_stats__fprintf(&session->stats, fp); 1460 1461 list_for_each_entry(pos, &session->evlist->entries, node) { 1462 ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos)); 1463 ret += events_stats__fprintf(&pos->hists.stats, fp); 1464 } 1465 1466 return ret; 1467 } 1468 1469 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 1470 { 1471 /* 1472 * FIXME: Here we have to actually print all the machines in this 1473 * session, not just the host... 1474 */ 1475 return machine__fprintf(&session->machines.host, fp); 1476 } 1477 1478 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, 1479 unsigned int type) 1480 { 1481 struct perf_evsel *pos; 1482 1483 list_for_each_entry(pos, &session->evlist->entries, node) { 1484 if (pos->attr.type == type) 1485 return pos; 1486 } 1487 return NULL; 1488 } 1489 1490 void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample, 1491 struct machine *machine, struct addr_location *al, 1492 unsigned int print_opts, unsigned int stack_depth) 1493 { 1494 struct callchain_cursor_node *node; 1495 int print_ip = print_opts & PRINT_IP_OPT_IP; 1496 int print_sym = print_opts & PRINT_IP_OPT_SYM; 1497 int print_dso = print_opts & PRINT_IP_OPT_DSO; 1498 int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET; 1499 int print_oneline = print_opts & PRINT_IP_OPT_ONELINE; 1500 int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE; 1501 char s = print_oneline ? ' ' : '\t'; 1502 1503 if (symbol_conf.use_callchain && sample->callchain) { 1504 struct addr_location node_al; 1505 1506 if (machine__resolve_callchain(machine, evsel, al->thread, 1507 sample, NULL, NULL, 1508 PERF_MAX_STACK_DEPTH) != 0) { 1509 if (verbose) 1510 error("Failed to resolve callchain. Skipping\n"); 1511 return; 1512 } 1513 callchain_cursor_commit(&callchain_cursor); 1514 1515 if (print_symoffset) 1516 node_al = *al; 1517 1518 while (stack_depth) { 1519 u64 addr = 0; 1520 1521 node = callchain_cursor_current(&callchain_cursor); 1522 if (!node) 1523 break; 1524 1525 if (node->sym && node->sym->ignore) 1526 goto next; 1527 1528 if (print_ip) 1529 printf("%c%16" PRIx64, s, node->ip); 1530 1531 if (node->map) 1532 addr = node->map->map_ip(node->map, node->ip); 1533 1534 if (print_sym) { 1535 printf(" "); 1536 if (print_symoffset) { 1537 node_al.addr = addr; 1538 node_al.map = node->map; 1539 symbol__fprintf_symname_offs(node->sym, &node_al, stdout); 1540 } else 1541 symbol__fprintf_symname(node->sym, stdout); 1542 } 1543 1544 if (print_dso) { 1545 printf(" ("); 1546 map__fprintf_dsoname(node->map, stdout); 1547 printf(")"); 1548 } 1549 1550 if (print_srcline) 1551 map__fprintf_srcline(node->map, addr, "\n ", 1552 stdout); 1553 1554 if (!print_oneline) 1555 printf("\n"); 1556 1557 stack_depth--; 1558 next: 1559 callchain_cursor_advance(&callchain_cursor); 1560 } 1561 1562 } else { 1563 if (al->sym && al->sym->ignore) 1564 return; 1565 1566 if (print_ip) 1567 printf("%16" PRIx64, sample->ip); 1568 1569 if (print_sym) { 1570 printf(" "); 1571 if (print_symoffset) 1572 symbol__fprintf_symname_offs(al->sym, al, 1573 stdout); 1574 else 1575 symbol__fprintf_symname(al->sym, stdout); 1576 } 1577 1578 if (print_dso) { 1579 printf(" ("); 1580 map__fprintf_dsoname(al->map, stdout); 1581 printf(")"); 1582 } 1583 1584 if (print_srcline) 1585 map__fprintf_srcline(al->map, al->addr, "\n ", stdout); 1586 } 1587 } 1588 1589 int perf_session__cpu_bitmap(struct perf_session *session, 1590 const char *cpu_list, unsigned long *cpu_bitmap) 1591 { 1592 int i; 1593 struct cpu_map *map; 1594 1595 for (i = 0; i < PERF_TYPE_MAX; ++i) { 1596 struct perf_evsel *evsel; 1597 1598 evsel = perf_session__find_first_evtype(session, i); 1599 if (!evsel) 1600 continue; 1601 1602 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) { 1603 pr_err("File does not contain CPU events. " 1604 "Remove -c option to proceed.\n"); 1605 return -1; 1606 } 1607 } 1608 1609 map = cpu_map__new(cpu_list); 1610 if (map == NULL) { 1611 pr_err("Invalid cpu_list\n"); 1612 return -1; 1613 } 1614 1615 for (i = 0; i < map->nr; i++) { 1616 int cpu = map->map[i]; 1617 1618 if (cpu >= MAX_NR_CPUS) { 1619 pr_err("Requested CPU %d too large. " 1620 "Consider raising MAX_NR_CPUS\n", cpu); 1621 return -1; 1622 } 1623 1624 set_bit(cpu, cpu_bitmap); 1625 } 1626 1627 return 0; 1628 } 1629 1630 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 1631 bool full) 1632 { 1633 int fd = perf_data_file__fd(session->file); 1634 struct stat st; 1635 int ret; 1636 1637 if (session == NULL || fp == NULL) 1638 return; 1639 1640 ret = fstat(fd, &st); 1641 if (ret == -1) 1642 return; 1643 1644 fprintf(fp, "# ========\n"); 1645 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime)); 1646 perf_header__fprintf_info(session, fp, full); 1647 fprintf(fp, "# ========\n#\n"); 1648 } 1649 1650 1651 int __perf_session__set_tracepoints_handlers(struct perf_session *session, 1652 const struct perf_evsel_str_handler *assocs, 1653 size_t nr_assocs) 1654 { 1655 struct perf_evsel *evsel; 1656 size_t i; 1657 int err; 1658 1659 for (i = 0; i < nr_assocs; i++) { 1660 /* 1661 * Adding a handler for an event not in the session, 1662 * just ignore it. 1663 */ 1664 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name); 1665 if (evsel == NULL) 1666 continue; 1667 1668 err = -EEXIST; 1669 if (evsel->handler != NULL) 1670 goto out; 1671 evsel->handler = assocs[i].handler; 1672 } 1673 1674 err = 0; 1675 out: 1676 return err; 1677 } 1678