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