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