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 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 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__combined_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 struct perf_sample *sample) 845 { 846 const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 847 848 if (perf_guest && 849 ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 850 (cpumode == PERF_RECORD_MISC_GUEST_USER))) { 851 u32 pid; 852 853 if (event->header.type == PERF_RECORD_MMAP) 854 pid = event->mmap.pid; 855 else 856 pid = sample->pid; 857 858 return perf_session__findnew_machine(session, pid); 859 } 860 861 return &session->machines.host; 862 } 863 864 static int deliver_sample_value(struct perf_session *session, 865 struct perf_tool *tool, 866 union perf_event *event, 867 struct perf_sample *sample, 868 struct sample_read_value *v, 869 struct machine *machine) 870 { 871 struct perf_sample_id *sid; 872 873 sid = perf_evlist__id2sid(session->evlist, v->id); 874 if (sid) { 875 sample->id = v->id; 876 sample->period = v->value - sid->period; 877 sid->period = v->value; 878 } 879 880 if (!sid || sid->evsel == NULL) { 881 ++session->stats.nr_unknown_id; 882 return 0; 883 } 884 885 return tool->sample(tool, event, sample, sid->evsel, machine); 886 } 887 888 static int deliver_sample_group(struct perf_session *session, 889 struct perf_tool *tool, 890 union perf_event *event, 891 struct perf_sample *sample, 892 struct machine *machine) 893 { 894 int ret = -EINVAL; 895 u64 i; 896 897 for (i = 0; i < sample->read.group.nr; i++) { 898 ret = deliver_sample_value(session, tool, event, sample, 899 &sample->read.group.values[i], 900 machine); 901 if (ret) 902 break; 903 } 904 905 return ret; 906 } 907 908 static int 909 perf_session__deliver_sample(struct perf_session *session, 910 struct perf_tool *tool, 911 union perf_event *event, 912 struct perf_sample *sample, 913 struct perf_evsel *evsel, 914 struct machine *machine) 915 { 916 /* We know evsel != NULL. */ 917 u64 sample_type = evsel->attr.sample_type; 918 u64 read_format = evsel->attr.read_format; 919 920 /* Standard sample delievery. */ 921 if (!(sample_type & PERF_SAMPLE_READ)) 922 return tool->sample(tool, event, sample, evsel, machine); 923 924 /* For PERF_SAMPLE_READ we have either single or group mode. */ 925 if (read_format & PERF_FORMAT_GROUP) 926 return deliver_sample_group(session, tool, event, sample, 927 machine); 928 else 929 return deliver_sample_value(session, tool, event, sample, 930 &sample->read.one, machine); 931 } 932 933 static int perf_session_deliver_event(struct perf_session *session, 934 union perf_event *event, 935 struct perf_sample *sample, 936 struct perf_tool *tool, 937 u64 file_offset) 938 { 939 struct perf_evsel *evsel; 940 struct machine *machine; 941 942 dump_event(session, event, file_offset, sample); 943 944 evsel = perf_evlist__id2evsel(session->evlist, sample->id); 945 if (evsel != NULL && event->header.type != PERF_RECORD_SAMPLE) { 946 /* 947 * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here 948 * because the tools right now may apply filters, discarding 949 * some of the samples. For consistency, in the future we 950 * should have something like nr_filtered_samples and remove 951 * the sample->period from total_sample_period, etc, KISS for 952 * now tho. 953 * 954 * Also testing against NULL allows us to handle files without 955 * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the 956 * future probably it'll be a good idea to restrict event 957 * processing via perf_session to files with both set. 958 */ 959 hists__inc_nr_events(&evsel->hists, event->header.type); 960 } 961 962 machine = perf_session__find_machine_for_cpumode(session, event, 963 sample); 964 965 switch (event->header.type) { 966 case PERF_RECORD_SAMPLE: 967 dump_sample(evsel, event, sample); 968 if (evsel == NULL) { 969 ++session->stats.nr_unknown_id; 970 return 0; 971 } 972 if (machine == NULL) { 973 ++session->stats.nr_unprocessable_samples; 974 return 0; 975 } 976 return perf_session__deliver_sample(session, tool, event, 977 sample, evsel, machine); 978 case PERF_RECORD_MMAP: 979 return tool->mmap(tool, event, sample, machine); 980 case PERF_RECORD_COMM: 981 return tool->comm(tool, event, sample, machine); 982 case PERF_RECORD_FORK: 983 return tool->fork(tool, event, sample, machine); 984 case PERF_RECORD_EXIT: 985 return tool->exit(tool, event, sample, machine); 986 case PERF_RECORD_LOST: 987 if (tool->lost == perf_event__process_lost) 988 session->stats.total_lost += event->lost.lost; 989 return tool->lost(tool, event, sample, machine); 990 case PERF_RECORD_READ: 991 return tool->read(tool, event, sample, evsel, machine); 992 case PERF_RECORD_THROTTLE: 993 return tool->throttle(tool, event, sample, machine); 994 case PERF_RECORD_UNTHROTTLE: 995 return tool->unthrottle(tool, event, sample, machine); 996 default: 997 ++session->stats.nr_unknown_events; 998 return -1; 999 } 1000 } 1001 1002 static int perf_session__process_user_event(struct perf_session *session, union perf_event *event, 1003 struct perf_tool *tool, u64 file_offset) 1004 { 1005 int err; 1006 1007 dump_event(session, event, file_offset, NULL); 1008 1009 /* These events are processed right away */ 1010 switch (event->header.type) { 1011 case PERF_RECORD_HEADER_ATTR: 1012 err = tool->attr(tool, event, &session->evlist); 1013 if (err == 0) 1014 perf_session__set_id_hdr_size(session); 1015 return err; 1016 case PERF_RECORD_HEADER_TRACING_DATA: 1017 /* setup for reading amidst mmap */ 1018 lseek(session->fd, file_offset, SEEK_SET); 1019 return tool->tracing_data(tool, event, session); 1020 case PERF_RECORD_HEADER_BUILD_ID: 1021 return tool->build_id(tool, event, session); 1022 case PERF_RECORD_FINISHED_ROUND: 1023 return tool->finished_round(tool, event, session); 1024 default: 1025 return -EINVAL; 1026 } 1027 } 1028 1029 static void event_swap(union perf_event *event, bool sample_id_all) 1030 { 1031 perf_event__swap_op swap; 1032 1033 swap = perf_event__swap_ops[event->header.type]; 1034 if (swap) 1035 swap(event, sample_id_all); 1036 } 1037 1038 static int perf_session__process_event(struct perf_session *session, 1039 union perf_event *event, 1040 struct perf_tool *tool, 1041 u64 file_offset) 1042 { 1043 struct perf_sample sample; 1044 int ret; 1045 1046 if (session->header.needs_swap) 1047 event_swap(event, perf_evlist__sample_id_all(session->evlist)); 1048 1049 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1050 return -EINVAL; 1051 1052 events_stats__inc(&session->stats, event->header.type); 1053 1054 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1055 return perf_session__process_user_event(session, event, tool, file_offset); 1056 1057 /* 1058 * For all kernel events we get the sample data 1059 */ 1060 ret = perf_evlist__parse_sample(session->evlist, event, &sample); 1061 if (ret) 1062 return ret; 1063 1064 if (tool->ordered_samples) { 1065 ret = perf_session_queue_event(session, event, &sample, 1066 file_offset); 1067 if (ret != -ETIME) 1068 return ret; 1069 } 1070 1071 return perf_session_deliver_event(session, event, &sample, tool, 1072 file_offset); 1073 } 1074 1075 void perf_event_header__bswap(struct perf_event_header *self) 1076 { 1077 self->type = bswap_32(self->type); 1078 self->misc = bswap_16(self->misc); 1079 self->size = bswap_16(self->size); 1080 } 1081 1082 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1083 { 1084 return machine__findnew_thread(&session->machines.host, 0, pid); 1085 } 1086 1087 static struct thread *perf_session__register_idle_thread(struct perf_session *self) 1088 { 1089 struct thread *thread = perf_session__findnew(self, 0); 1090 1091 if (thread == NULL || thread__set_comm(thread, "swapper")) { 1092 pr_err("problem inserting idle task.\n"); 1093 thread = NULL; 1094 } 1095 1096 return thread; 1097 } 1098 1099 static void perf_session__warn_about_errors(const struct perf_session *session, 1100 const struct perf_tool *tool) 1101 { 1102 if (tool->lost == perf_event__process_lost && 1103 session->stats.nr_events[PERF_RECORD_LOST] != 0) { 1104 ui__warning("Processed %d events and lost %d chunks!\n\n" 1105 "Check IO/CPU overload!\n\n", 1106 session->stats.nr_events[0], 1107 session->stats.nr_events[PERF_RECORD_LOST]); 1108 } 1109 1110 if (session->stats.nr_unknown_events != 0) { 1111 ui__warning("Found %u unknown events!\n\n" 1112 "Is this an older tool processing a perf.data " 1113 "file generated by a more recent tool?\n\n" 1114 "If that is not the case, consider " 1115 "reporting to linux-kernel@vger.kernel.org.\n\n", 1116 session->stats.nr_unknown_events); 1117 } 1118 1119 if (session->stats.nr_unknown_id != 0) { 1120 ui__warning("%u samples with id not present in the header\n", 1121 session->stats.nr_unknown_id); 1122 } 1123 1124 if (session->stats.nr_invalid_chains != 0) { 1125 ui__warning("Found invalid callchains!\n\n" 1126 "%u out of %u events were discarded for this reason.\n\n" 1127 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1128 session->stats.nr_invalid_chains, 1129 session->stats.nr_events[PERF_RECORD_SAMPLE]); 1130 } 1131 1132 if (session->stats.nr_unprocessable_samples != 0) { 1133 ui__warning("%u unprocessable samples recorded.\n" 1134 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1135 session->stats.nr_unprocessable_samples); 1136 } 1137 } 1138 1139 #define session_done() (*(volatile int *)(&session_done)) 1140 volatile int session_done; 1141 1142 static int __perf_session__process_pipe_events(struct perf_session *self, 1143 struct perf_tool *tool) 1144 { 1145 union perf_event *event; 1146 uint32_t size, cur_size = 0; 1147 void *buf = NULL; 1148 int skip = 0; 1149 u64 head; 1150 int err; 1151 void *p; 1152 1153 perf_tool__fill_defaults(tool); 1154 1155 head = 0; 1156 cur_size = sizeof(union perf_event); 1157 1158 buf = malloc(cur_size); 1159 if (!buf) 1160 return -errno; 1161 more: 1162 event = buf; 1163 err = readn(self->fd, event, sizeof(struct perf_event_header)); 1164 if (err <= 0) { 1165 if (err == 0) 1166 goto done; 1167 1168 pr_err("failed to read event header\n"); 1169 goto out_err; 1170 } 1171 1172 if (self->header.needs_swap) 1173 perf_event_header__bswap(&event->header); 1174 1175 size = event->header.size; 1176 if (size < sizeof(struct perf_event_header)) { 1177 pr_err("bad event header size\n"); 1178 goto out_err; 1179 } 1180 1181 if (size > cur_size) { 1182 void *new = realloc(buf, size); 1183 if (!new) { 1184 pr_err("failed to allocate memory to read event\n"); 1185 goto out_err; 1186 } 1187 buf = new; 1188 cur_size = size; 1189 event = buf; 1190 } 1191 p = event; 1192 p += sizeof(struct perf_event_header); 1193 1194 if (size - sizeof(struct perf_event_header)) { 1195 err = readn(self->fd, p, size - sizeof(struct perf_event_header)); 1196 if (err <= 0) { 1197 if (err == 0) { 1198 pr_err("unexpected end of event stream\n"); 1199 goto done; 1200 } 1201 1202 pr_err("failed to read event data\n"); 1203 goto out_err; 1204 } 1205 } 1206 1207 if ((skip = perf_session__process_event(self, event, tool, head)) < 0) { 1208 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1209 head, event->header.size, event->header.type); 1210 err = -EINVAL; 1211 goto out_err; 1212 } 1213 1214 head += size; 1215 1216 if (skip > 0) 1217 head += skip; 1218 1219 if (!session_done()) 1220 goto more; 1221 done: 1222 err = 0; 1223 out_err: 1224 free(buf); 1225 perf_session__warn_about_errors(self, tool); 1226 perf_session_free_sample_buffers(self); 1227 return err; 1228 } 1229 1230 static union perf_event * 1231 fetch_mmaped_event(struct perf_session *session, 1232 u64 head, size_t mmap_size, char *buf) 1233 { 1234 union perf_event *event; 1235 1236 /* 1237 * Ensure we have enough space remaining to read 1238 * the size of the event in the headers. 1239 */ 1240 if (head + sizeof(event->header) > mmap_size) 1241 return NULL; 1242 1243 event = (union perf_event *)(buf + head); 1244 1245 if (session->header.needs_swap) 1246 perf_event_header__bswap(&event->header); 1247 1248 if (head + event->header.size > mmap_size) { 1249 /* We're not fetching the event so swap back again */ 1250 if (session->header.needs_swap) 1251 perf_event_header__bswap(&event->header); 1252 return NULL; 1253 } 1254 1255 return event; 1256 } 1257 1258 /* 1259 * On 64bit we can mmap the data file in one go. No need for tiny mmap 1260 * slices. On 32bit we use 32MB. 1261 */ 1262 #if BITS_PER_LONG == 64 1263 #define MMAP_SIZE ULLONG_MAX 1264 #define NUM_MMAPS 1 1265 #else 1266 #define MMAP_SIZE (32 * 1024 * 1024ULL) 1267 #define NUM_MMAPS 128 1268 #endif 1269 1270 int __perf_session__process_events(struct perf_session *session, 1271 u64 data_offset, u64 data_size, 1272 u64 file_size, struct perf_tool *tool) 1273 { 1274 u64 head, page_offset, file_offset, file_pos, progress_next; 1275 int err, mmap_prot, mmap_flags, map_idx = 0; 1276 size_t mmap_size; 1277 char *buf, *mmaps[NUM_MMAPS]; 1278 union perf_event *event; 1279 uint32_t size; 1280 1281 perf_tool__fill_defaults(tool); 1282 1283 page_offset = page_size * (data_offset / page_size); 1284 file_offset = page_offset; 1285 head = data_offset - page_offset; 1286 1287 if (data_offset + data_size < file_size) 1288 file_size = data_offset + data_size; 1289 1290 progress_next = file_size / 16; 1291 1292 mmap_size = MMAP_SIZE; 1293 if (mmap_size > file_size) 1294 mmap_size = file_size; 1295 1296 memset(mmaps, 0, sizeof(mmaps)); 1297 1298 mmap_prot = PROT_READ; 1299 mmap_flags = MAP_SHARED; 1300 1301 if (session->header.needs_swap) { 1302 mmap_prot |= PROT_WRITE; 1303 mmap_flags = MAP_PRIVATE; 1304 } 1305 remap: 1306 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, session->fd, 1307 file_offset); 1308 if (buf == MAP_FAILED) { 1309 pr_err("failed to mmap file\n"); 1310 err = -errno; 1311 goto out_err; 1312 } 1313 mmaps[map_idx] = buf; 1314 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 1315 file_pos = file_offset + head; 1316 1317 more: 1318 event = fetch_mmaped_event(session, head, mmap_size, buf); 1319 if (!event) { 1320 if (mmaps[map_idx]) { 1321 munmap(mmaps[map_idx], mmap_size); 1322 mmaps[map_idx] = NULL; 1323 } 1324 1325 page_offset = page_size * (head / page_size); 1326 file_offset += page_offset; 1327 head -= page_offset; 1328 goto remap; 1329 } 1330 1331 size = event->header.size; 1332 1333 if (size < sizeof(struct perf_event_header) || 1334 perf_session__process_event(session, event, tool, file_pos) < 0) { 1335 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1336 file_offset + head, event->header.size, 1337 event->header.type); 1338 err = -EINVAL; 1339 goto out_err; 1340 } 1341 1342 head += size; 1343 file_pos += size; 1344 1345 if (file_pos >= progress_next) { 1346 progress_next += file_size / 16; 1347 ui_progress__update(file_pos, file_size, 1348 "Processing events..."); 1349 } 1350 1351 if (file_pos < file_size) 1352 goto more; 1353 1354 err = 0; 1355 /* do the final flush for ordered samples */ 1356 session->ordered_samples.next_flush = ULLONG_MAX; 1357 err = flush_sample_queue(session, tool); 1358 out_err: 1359 ui_progress__finish(); 1360 perf_session__warn_about_errors(session, tool); 1361 perf_session_free_sample_buffers(session); 1362 return err; 1363 } 1364 1365 int perf_session__process_events(struct perf_session *self, 1366 struct perf_tool *tool) 1367 { 1368 int err; 1369 1370 if (perf_session__register_idle_thread(self) == NULL) 1371 return -ENOMEM; 1372 1373 if (!self->fd_pipe) 1374 err = __perf_session__process_events(self, 1375 self->header.data_offset, 1376 self->header.data_size, 1377 self->size, tool); 1378 else 1379 err = __perf_session__process_pipe_events(self, tool); 1380 1381 return err; 1382 } 1383 1384 bool perf_session__has_traces(struct perf_session *session, const char *msg) 1385 { 1386 struct perf_evsel *evsel; 1387 1388 list_for_each_entry(evsel, &session->evlist->entries, node) { 1389 if (evsel->attr.type == PERF_TYPE_TRACEPOINT) 1390 return true; 1391 } 1392 1393 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 1394 return false; 1395 } 1396 1397 int maps__set_kallsyms_ref_reloc_sym(struct map **maps, 1398 const char *symbol_name, u64 addr) 1399 { 1400 char *bracket; 1401 enum map_type i; 1402 struct ref_reloc_sym *ref; 1403 1404 ref = zalloc(sizeof(struct ref_reloc_sym)); 1405 if (ref == NULL) 1406 return -ENOMEM; 1407 1408 ref->name = strdup(symbol_name); 1409 if (ref->name == NULL) { 1410 free(ref); 1411 return -ENOMEM; 1412 } 1413 1414 bracket = strchr(ref->name, ']'); 1415 if (bracket) 1416 *bracket = '\0'; 1417 1418 ref->addr = addr; 1419 1420 for (i = 0; i < MAP__NR_TYPES; ++i) { 1421 struct kmap *kmap = map__kmap(maps[i]); 1422 kmap->ref_reloc_sym = ref; 1423 } 1424 1425 return 0; 1426 } 1427 1428 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp) 1429 { 1430 return machines__fprintf_dsos(&self->machines, fp); 1431 } 1432 1433 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp, 1434 bool (skip)(struct dso *dso, int parm), int parm) 1435 { 1436 return machines__fprintf_dsos_buildid(&self->machines, fp, skip, parm); 1437 } 1438 1439 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 1440 { 1441 struct perf_evsel *pos; 1442 size_t ret = fprintf(fp, "Aggregated stats:\n"); 1443 1444 ret += events_stats__fprintf(&session->stats, fp); 1445 1446 list_for_each_entry(pos, &session->evlist->entries, node) { 1447 ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos)); 1448 ret += events_stats__fprintf(&pos->hists.stats, fp); 1449 } 1450 1451 return ret; 1452 } 1453 1454 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 1455 { 1456 /* 1457 * FIXME: Here we have to actually print all the machines in this 1458 * session, not just the host... 1459 */ 1460 return machine__fprintf(&session->machines.host, fp); 1461 } 1462 1463 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, 1464 unsigned int type) 1465 { 1466 struct perf_evsel *pos; 1467 1468 list_for_each_entry(pos, &session->evlist->entries, node) { 1469 if (pos->attr.type == type) 1470 return pos; 1471 } 1472 return NULL; 1473 } 1474 1475 void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event, 1476 struct perf_sample *sample, struct machine *machine, 1477 unsigned int print_opts, unsigned int stack_depth) 1478 { 1479 struct addr_location al; 1480 struct callchain_cursor_node *node; 1481 int print_ip = print_opts & PRINT_IP_OPT_IP; 1482 int print_sym = print_opts & PRINT_IP_OPT_SYM; 1483 int print_dso = print_opts & PRINT_IP_OPT_DSO; 1484 int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET; 1485 int print_oneline = print_opts & PRINT_IP_OPT_ONELINE; 1486 char s = print_oneline ? ' ' : '\t'; 1487 1488 if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) { 1489 error("problem processing %d event, skipping it.\n", 1490 event->header.type); 1491 return; 1492 } 1493 1494 if (symbol_conf.use_callchain && sample->callchain) { 1495 1496 if (machine__resolve_callchain(machine, evsel, al.thread, 1497 sample, NULL, NULL) != 0) { 1498 if (verbose) 1499 error("Failed to resolve callchain. Skipping\n"); 1500 return; 1501 } 1502 callchain_cursor_commit(&callchain_cursor); 1503 1504 while (stack_depth) { 1505 node = callchain_cursor_current(&callchain_cursor); 1506 if (!node) 1507 break; 1508 1509 if (print_ip) 1510 printf("%c%16" PRIx64, s, node->ip); 1511 1512 if (print_sym) { 1513 printf(" "); 1514 if (print_symoffset) { 1515 al.addr = node->ip; 1516 symbol__fprintf_symname_offs(node->sym, &al, stdout); 1517 } else 1518 symbol__fprintf_symname(node->sym, stdout); 1519 } 1520 1521 if (print_dso) { 1522 printf(" ("); 1523 map__fprintf_dsoname(node->map, stdout); 1524 printf(")"); 1525 } 1526 1527 if (!print_oneline) 1528 printf("\n"); 1529 1530 callchain_cursor_advance(&callchain_cursor); 1531 1532 stack_depth--; 1533 } 1534 1535 } else { 1536 if (print_ip) 1537 printf("%16" PRIx64, sample->ip); 1538 1539 if (print_sym) { 1540 printf(" "); 1541 if (print_symoffset) 1542 symbol__fprintf_symname_offs(al.sym, &al, 1543 stdout); 1544 else 1545 symbol__fprintf_symname(al.sym, stdout); 1546 } 1547 1548 if (print_dso) { 1549 printf(" ("); 1550 map__fprintf_dsoname(al.map, stdout); 1551 printf(")"); 1552 } 1553 } 1554 } 1555 1556 int perf_session__cpu_bitmap(struct perf_session *session, 1557 const char *cpu_list, unsigned long *cpu_bitmap) 1558 { 1559 int i; 1560 struct cpu_map *map; 1561 1562 for (i = 0; i < PERF_TYPE_MAX; ++i) { 1563 struct perf_evsel *evsel; 1564 1565 evsel = perf_session__find_first_evtype(session, i); 1566 if (!evsel) 1567 continue; 1568 1569 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) { 1570 pr_err("File does not contain CPU events. " 1571 "Remove -c option to proceed.\n"); 1572 return -1; 1573 } 1574 } 1575 1576 map = cpu_map__new(cpu_list); 1577 if (map == NULL) { 1578 pr_err("Invalid cpu_list\n"); 1579 return -1; 1580 } 1581 1582 for (i = 0; i < map->nr; i++) { 1583 int cpu = map->map[i]; 1584 1585 if (cpu >= MAX_NR_CPUS) { 1586 pr_err("Requested CPU %d too large. " 1587 "Consider raising MAX_NR_CPUS\n", cpu); 1588 return -1; 1589 } 1590 1591 set_bit(cpu, cpu_bitmap); 1592 } 1593 1594 return 0; 1595 } 1596 1597 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 1598 bool full) 1599 { 1600 struct stat st; 1601 int ret; 1602 1603 if (session == NULL || fp == NULL) 1604 return; 1605 1606 ret = fstat(session->fd, &st); 1607 if (ret == -1) 1608 return; 1609 1610 fprintf(fp, "# ========\n"); 1611 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime)); 1612 perf_header__fprintf_info(session, fp, full); 1613 fprintf(fp, "# ========\n#\n"); 1614 } 1615 1616 1617 int __perf_session__set_tracepoints_handlers(struct perf_session *session, 1618 const struct perf_evsel_str_handler *assocs, 1619 size_t nr_assocs) 1620 { 1621 struct perf_evlist *evlist = session->evlist; 1622 struct event_format *format; 1623 struct perf_evsel *evsel; 1624 char *tracepoint, *name; 1625 size_t i; 1626 int err; 1627 1628 for (i = 0; i < nr_assocs; i++) { 1629 err = -ENOMEM; 1630 tracepoint = strdup(assocs[i].name); 1631 if (tracepoint == NULL) 1632 goto out; 1633 1634 err = -ENOENT; 1635 name = strchr(tracepoint, ':'); 1636 if (name == NULL) 1637 goto out_free; 1638 1639 *name++ = '\0'; 1640 format = pevent_find_event_by_name(session->pevent, 1641 tracepoint, name); 1642 if (format == NULL) { 1643 /* 1644 * Adding a handler for an event not in the session, 1645 * just ignore it. 1646 */ 1647 goto next; 1648 } 1649 1650 evsel = perf_evlist__find_tracepoint_by_id(evlist, format->id); 1651 if (evsel == NULL) 1652 goto next; 1653 1654 err = -EEXIST; 1655 if (evsel->handler.func != NULL) 1656 goto out_free; 1657 evsel->handler.func = assocs[i].handler; 1658 next: 1659 free(tracepoint); 1660 } 1661 1662 err = 0; 1663 out: 1664 return err; 1665 1666 out_free: 1667 free(tracepoint); 1668 goto out; 1669 } 1670