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