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__mmap2_swap(union perf_event *event, 355 bool sample_id_all) 356 { 357 event->mmap2.pid = bswap_32(event->mmap2.pid); 358 event->mmap2.tid = bswap_32(event->mmap2.tid); 359 event->mmap2.start = bswap_64(event->mmap2.start); 360 event->mmap2.len = bswap_64(event->mmap2.len); 361 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); 362 event->mmap2.maj = bswap_32(event->mmap2.maj); 363 event->mmap2.min = bswap_32(event->mmap2.min); 364 event->mmap2.ino = bswap_64(event->mmap2.ino); 365 366 if (sample_id_all) { 367 void *data = &event->mmap2.filename; 368 369 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 370 swap_sample_id_all(event, data); 371 } 372 } 373 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 374 { 375 event->fork.pid = bswap_32(event->fork.pid); 376 event->fork.tid = bswap_32(event->fork.tid); 377 event->fork.ppid = bswap_32(event->fork.ppid); 378 event->fork.ptid = bswap_32(event->fork.ptid); 379 event->fork.time = bswap_64(event->fork.time); 380 381 if (sample_id_all) 382 swap_sample_id_all(event, &event->fork + 1); 383 } 384 385 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 386 { 387 event->read.pid = bswap_32(event->read.pid); 388 event->read.tid = bswap_32(event->read.tid); 389 event->read.value = bswap_64(event->read.value); 390 event->read.time_enabled = bswap_64(event->read.time_enabled); 391 event->read.time_running = bswap_64(event->read.time_running); 392 event->read.id = bswap_64(event->read.id); 393 394 if (sample_id_all) 395 swap_sample_id_all(event, &event->read + 1); 396 } 397 398 static u8 revbyte(u8 b) 399 { 400 int rev = (b >> 4) | ((b & 0xf) << 4); 401 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 402 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 403 return (u8) rev; 404 } 405 406 /* 407 * XXX this is hack in attempt to carry flags bitfield 408 * throught endian village. ABI says: 409 * 410 * Bit-fields are allocated from right to left (least to most significant) 411 * on little-endian implementations and from left to right (most to least 412 * significant) on big-endian implementations. 413 * 414 * The above seems to be byte specific, so we need to reverse each 415 * byte of the bitfield. 'Internet' also says this might be implementation 416 * specific and we probably need proper fix and carry perf_event_attr 417 * bitfield flags in separate data file FEAT_ section. Thought this seems 418 * to work for now. 419 */ 420 static void swap_bitfield(u8 *p, unsigned len) 421 { 422 unsigned i; 423 424 for (i = 0; i < len; i++) { 425 *p = revbyte(*p); 426 p++; 427 } 428 } 429 430 /* exported for swapping attributes in file header */ 431 void perf_event__attr_swap(struct perf_event_attr *attr) 432 { 433 attr->type = bswap_32(attr->type); 434 attr->size = bswap_32(attr->size); 435 attr->config = bswap_64(attr->config); 436 attr->sample_period = bswap_64(attr->sample_period); 437 attr->sample_type = bswap_64(attr->sample_type); 438 attr->read_format = bswap_64(attr->read_format); 439 attr->wakeup_events = bswap_32(attr->wakeup_events); 440 attr->bp_type = bswap_32(attr->bp_type); 441 attr->bp_addr = bswap_64(attr->bp_addr); 442 attr->bp_len = bswap_64(attr->bp_len); 443 444 swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64)); 445 } 446 447 static void perf_event__hdr_attr_swap(union perf_event *event, 448 bool sample_id_all __maybe_unused) 449 { 450 size_t size; 451 452 perf_event__attr_swap(&event->attr.attr); 453 454 size = event->header.size; 455 size -= (void *)&event->attr.id - (void *)event; 456 mem_bswap_64(event->attr.id, size); 457 } 458 459 static void perf_event__event_type_swap(union perf_event *event, 460 bool sample_id_all __maybe_unused) 461 { 462 event->event_type.event_type.event_id = 463 bswap_64(event->event_type.event_type.event_id); 464 } 465 466 static void perf_event__tracing_data_swap(union perf_event *event, 467 bool sample_id_all __maybe_unused) 468 { 469 event->tracing_data.size = bswap_32(event->tracing_data.size); 470 } 471 472 typedef void (*perf_event__swap_op)(union perf_event *event, 473 bool sample_id_all); 474 475 static perf_event__swap_op perf_event__swap_ops[] = { 476 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 477 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap, 478 [PERF_RECORD_COMM] = perf_event__comm_swap, 479 [PERF_RECORD_FORK] = perf_event__task_swap, 480 [PERF_RECORD_EXIT] = perf_event__task_swap, 481 [PERF_RECORD_LOST] = perf_event__all64_swap, 482 [PERF_RECORD_READ] = perf_event__read_swap, 483 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 484 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 485 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 486 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 487 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 488 [PERF_RECORD_HEADER_MAX] = NULL, 489 }; 490 491 struct sample_queue { 492 u64 timestamp; 493 u64 file_offset; 494 union perf_event *event; 495 struct list_head list; 496 }; 497 498 static void perf_session_free_sample_buffers(struct perf_session *session) 499 { 500 struct ordered_samples *os = &session->ordered_samples; 501 502 while (!list_empty(&os->to_free)) { 503 struct sample_queue *sq; 504 505 sq = list_entry(os->to_free.next, struct sample_queue, list); 506 list_del(&sq->list); 507 free(sq); 508 } 509 } 510 511 static int perf_session_deliver_event(struct perf_session *session, 512 union perf_event *event, 513 struct perf_sample *sample, 514 struct perf_tool *tool, 515 u64 file_offset); 516 517 static int flush_sample_queue(struct perf_session *s, 518 struct perf_tool *tool) 519 { 520 struct ordered_samples *os = &s->ordered_samples; 521 struct list_head *head = &os->samples; 522 struct sample_queue *tmp, *iter; 523 struct perf_sample sample; 524 u64 limit = os->next_flush; 525 u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL; 526 unsigned idx = 0, progress_next = os->nr_samples / 16; 527 bool show_progress = limit == ULLONG_MAX; 528 int ret; 529 530 if (!tool->ordered_samples || !limit) 531 return 0; 532 533 list_for_each_entry_safe(iter, tmp, head, list) { 534 if (session_done()) 535 return 0; 536 537 if (iter->timestamp > limit) 538 break; 539 540 ret = perf_evlist__parse_sample(s->evlist, iter->event, &sample); 541 if (ret) 542 pr_err("Can't parse sample, err = %d\n", ret); 543 else { 544 ret = perf_session_deliver_event(s, iter->event, &sample, tool, 545 iter->file_offset); 546 if (ret) 547 return ret; 548 } 549 550 os->last_flush = iter->timestamp; 551 list_del(&iter->list); 552 list_add(&iter->list, &os->sample_cache); 553 if (show_progress && (++idx >= progress_next)) { 554 progress_next += os->nr_samples / 16; 555 ui_progress__update(idx, os->nr_samples, 556 "Processing time ordered events..."); 557 } 558 } 559 560 if (list_empty(head)) { 561 os->last_sample = NULL; 562 } else if (last_ts <= limit) { 563 os->last_sample = 564 list_entry(head->prev, struct sample_queue, list); 565 } 566 567 os->nr_samples = 0; 568 569 return 0; 570 } 571 572 /* 573 * When perf record finishes a pass on every buffers, it records this pseudo 574 * event. 575 * We record the max timestamp t found in the pass n. 576 * Assuming these timestamps are monotonic across cpus, we know that if 577 * a buffer still has events with timestamps below t, they will be all 578 * available and then read in the pass n + 1. 579 * Hence when we start to read the pass n + 2, we can safely flush every 580 * events with timestamps below t. 581 * 582 * ============ PASS n ================= 583 * CPU 0 | CPU 1 584 * | 585 * cnt1 timestamps | cnt2 timestamps 586 * 1 | 2 587 * 2 | 3 588 * - | 4 <--- max recorded 589 * 590 * ============ PASS n + 1 ============== 591 * CPU 0 | CPU 1 592 * | 593 * cnt1 timestamps | cnt2 timestamps 594 * 3 | 5 595 * 4 | 6 596 * 5 | 7 <---- max recorded 597 * 598 * Flush every events below timestamp 4 599 * 600 * ============ PASS n + 2 ============== 601 * CPU 0 | CPU 1 602 * | 603 * cnt1 timestamps | cnt2 timestamps 604 * 6 | 8 605 * 7 | 9 606 * - | 10 607 * 608 * Flush every events below timestamp 7 609 * etc... 610 */ 611 static int process_finished_round(struct perf_tool *tool, 612 union perf_event *event __maybe_unused, 613 struct perf_session *session) 614 { 615 int ret = flush_sample_queue(session, tool); 616 if (!ret) 617 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp; 618 619 return ret; 620 } 621 622 /* The queue is ordered by time */ 623 static void __queue_event(struct sample_queue *new, struct perf_session *s) 624 { 625 struct ordered_samples *os = &s->ordered_samples; 626 struct sample_queue *sample = os->last_sample; 627 u64 timestamp = new->timestamp; 628 struct list_head *p; 629 630 ++os->nr_samples; 631 os->last_sample = new; 632 633 if (!sample) { 634 list_add(&new->list, &os->samples); 635 os->max_timestamp = timestamp; 636 return; 637 } 638 639 /* 640 * last_sample might point to some random place in the list as it's 641 * the last queued event. We expect that the new event is close to 642 * this. 643 */ 644 if (sample->timestamp <= timestamp) { 645 while (sample->timestamp <= timestamp) { 646 p = sample->list.next; 647 if (p == &os->samples) { 648 list_add_tail(&new->list, &os->samples); 649 os->max_timestamp = timestamp; 650 return; 651 } 652 sample = list_entry(p, struct sample_queue, list); 653 } 654 list_add_tail(&new->list, &sample->list); 655 } else { 656 while (sample->timestamp > timestamp) { 657 p = sample->list.prev; 658 if (p == &os->samples) { 659 list_add(&new->list, &os->samples); 660 return; 661 } 662 sample = list_entry(p, struct sample_queue, list); 663 } 664 list_add(&new->list, &sample->list); 665 } 666 } 667 668 #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue)) 669 670 int perf_session_queue_event(struct perf_session *s, union perf_event *event, 671 struct perf_sample *sample, u64 file_offset) 672 { 673 struct ordered_samples *os = &s->ordered_samples; 674 struct list_head *sc = &os->sample_cache; 675 u64 timestamp = sample->time; 676 struct sample_queue *new; 677 678 if (!timestamp || timestamp == ~0ULL) 679 return -ETIME; 680 681 if (timestamp < s->ordered_samples.last_flush) { 682 printf("Warning: Timestamp below last timeslice flush\n"); 683 return -EINVAL; 684 } 685 686 if (!list_empty(sc)) { 687 new = list_entry(sc->next, struct sample_queue, list); 688 list_del(&new->list); 689 } else if (os->sample_buffer) { 690 new = os->sample_buffer + os->sample_buffer_idx; 691 if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER) 692 os->sample_buffer = NULL; 693 } else { 694 os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new)); 695 if (!os->sample_buffer) 696 return -ENOMEM; 697 list_add(&os->sample_buffer->list, &os->to_free); 698 os->sample_buffer_idx = 2; 699 new = os->sample_buffer + 1; 700 } 701 702 new->timestamp = timestamp; 703 new->file_offset = file_offset; 704 new->event = event; 705 706 __queue_event(new, s); 707 708 return 0; 709 } 710 711 static void callchain__printf(struct perf_sample *sample) 712 { 713 unsigned int i; 714 715 printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr); 716 717 for (i = 0; i < sample->callchain->nr; i++) 718 printf("..... %2d: %016" PRIx64 "\n", 719 i, sample->callchain->ips[i]); 720 } 721 722 static void branch_stack__printf(struct perf_sample *sample) 723 { 724 uint64_t i; 725 726 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr); 727 728 for (i = 0; i < sample->branch_stack->nr; i++) 729 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n", 730 i, sample->branch_stack->entries[i].from, 731 sample->branch_stack->entries[i].to); 732 } 733 734 static void regs_dump__printf(u64 mask, u64 *regs) 735 { 736 unsigned rid, i = 0; 737 738 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { 739 u64 val = regs[i++]; 740 741 printf(".... %-5s 0x%" PRIx64 "\n", 742 perf_reg_name(rid), val); 743 } 744 } 745 746 static void regs_user__printf(struct perf_sample *sample, u64 mask) 747 { 748 struct regs_dump *user_regs = &sample->user_regs; 749 750 if (user_regs->regs) { 751 printf("... user regs: mask 0x%" PRIx64 "\n", mask); 752 regs_dump__printf(mask, user_regs->regs); 753 } 754 } 755 756 static void stack_user__printf(struct stack_dump *dump) 757 { 758 printf("... ustack: size %" PRIu64 ", offset 0x%x\n", 759 dump->size, dump->offset); 760 } 761 762 static void perf_session__print_tstamp(struct perf_session *session, 763 union perf_event *event, 764 struct perf_sample *sample) 765 { 766 u64 sample_type = __perf_evlist__combined_sample_type(session->evlist); 767 768 if (event->header.type != PERF_RECORD_SAMPLE && 769 !perf_evlist__sample_id_all(session->evlist)) { 770 fputs("-1 -1 ", stdout); 771 return; 772 } 773 774 if ((sample_type & PERF_SAMPLE_CPU)) 775 printf("%u ", sample->cpu); 776 777 if (sample_type & PERF_SAMPLE_TIME) 778 printf("%" PRIu64 " ", sample->time); 779 } 780 781 static void sample_read__printf(struct perf_sample *sample, u64 read_format) 782 { 783 printf("... sample_read:\n"); 784 785 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 786 printf("...... time enabled %016" PRIx64 "\n", 787 sample->read.time_enabled); 788 789 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 790 printf("...... time running %016" PRIx64 "\n", 791 sample->read.time_running); 792 793 if (read_format & PERF_FORMAT_GROUP) { 794 u64 i; 795 796 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr); 797 798 for (i = 0; i < sample->read.group.nr; i++) { 799 struct sample_read_value *value; 800 801 value = &sample->read.group.values[i]; 802 printf("..... id %016" PRIx64 803 ", value %016" PRIx64 "\n", 804 value->id, value->value); 805 } 806 } else 807 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n", 808 sample->read.one.id, sample->read.one.value); 809 } 810 811 static void dump_event(struct perf_session *session, union perf_event *event, 812 u64 file_offset, struct perf_sample *sample) 813 { 814 if (!dump_trace) 815 return; 816 817 printf("\n%#" PRIx64 " [%#x]: event: %d\n", 818 file_offset, event->header.size, event->header.type); 819 820 trace_event(event); 821 822 if (sample) 823 perf_session__print_tstamp(session, event, sample); 824 825 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 826 event->header.size, perf_event__name(event->header.type)); 827 } 828 829 static void dump_sample(struct perf_evsel *evsel, union perf_event *event, 830 struct perf_sample *sample) 831 { 832 u64 sample_type; 833 834 if (!dump_trace) 835 return; 836 837 printf("(IP, %d): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 838 event->header.misc, sample->pid, sample->tid, sample->ip, 839 sample->period, sample->addr); 840 841 sample_type = evsel->attr.sample_type; 842 843 if (sample_type & PERF_SAMPLE_CALLCHAIN) 844 callchain__printf(sample); 845 846 if (sample_type & PERF_SAMPLE_BRANCH_STACK) 847 branch_stack__printf(sample); 848 849 if (sample_type & PERF_SAMPLE_REGS_USER) 850 regs_user__printf(sample, evsel->attr.sample_regs_user); 851 852 if (sample_type & PERF_SAMPLE_STACK_USER) 853 stack_user__printf(&sample->user_stack); 854 855 if (sample_type & PERF_SAMPLE_WEIGHT) 856 printf("... weight: %" PRIu64 "\n", sample->weight); 857 858 if (sample_type & PERF_SAMPLE_DATA_SRC) 859 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src); 860 861 if (sample_type & PERF_SAMPLE_READ) 862 sample_read__printf(sample, evsel->attr.read_format); 863 } 864 865 static struct machine * 866 perf_session__find_machine_for_cpumode(struct perf_session *session, 867 union perf_event *event, 868 struct perf_sample *sample) 869 { 870 const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 871 872 if (perf_guest && 873 ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 874 (cpumode == PERF_RECORD_MISC_GUEST_USER))) { 875 u32 pid; 876 877 if (event->header.type == PERF_RECORD_MMAP 878 || event->header.type == PERF_RECORD_MMAP2) 879 pid = event->mmap.pid; 880 else 881 pid = sample->pid; 882 883 return perf_session__findnew_machine(session, pid); 884 } 885 886 return &session->machines.host; 887 } 888 889 static int deliver_sample_value(struct perf_session *session, 890 struct perf_tool *tool, 891 union perf_event *event, 892 struct perf_sample *sample, 893 struct sample_read_value *v, 894 struct machine *machine) 895 { 896 struct perf_sample_id *sid; 897 898 sid = perf_evlist__id2sid(session->evlist, v->id); 899 if (sid) { 900 sample->id = v->id; 901 sample->period = v->value - sid->period; 902 sid->period = v->value; 903 } 904 905 if (!sid || sid->evsel == NULL) { 906 ++session->stats.nr_unknown_id; 907 return 0; 908 } 909 910 return tool->sample(tool, event, sample, sid->evsel, machine); 911 } 912 913 static int deliver_sample_group(struct perf_session *session, 914 struct perf_tool *tool, 915 union perf_event *event, 916 struct perf_sample *sample, 917 struct machine *machine) 918 { 919 int ret = -EINVAL; 920 u64 i; 921 922 for (i = 0; i < sample->read.group.nr; i++) { 923 ret = deliver_sample_value(session, tool, event, sample, 924 &sample->read.group.values[i], 925 machine); 926 if (ret) 927 break; 928 } 929 930 return ret; 931 } 932 933 static int 934 perf_session__deliver_sample(struct perf_session *session, 935 struct perf_tool *tool, 936 union perf_event *event, 937 struct perf_sample *sample, 938 struct perf_evsel *evsel, 939 struct machine *machine) 940 { 941 /* We know evsel != NULL. */ 942 u64 sample_type = evsel->attr.sample_type; 943 u64 read_format = evsel->attr.read_format; 944 945 /* Standard sample delievery. */ 946 if (!(sample_type & PERF_SAMPLE_READ)) 947 return tool->sample(tool, event, sample, evsel, machine); 948 949 /* For PERF_SAMPLE_READ we have either single or group mode. */ 950 if (read_format & PERF_FORMAT_GROUP) 951 return deliver_sample_group(session, tool, event, sample, 952 machine); 953 else 954 return deliver_sample_value(session, tool, event, sample, 955 &sample->read.one, machine); 956 } 957 958 static int perf_session_deliver_event(struct perf_session *session, 959 union perf_event *event, 960 struct perf_sample *sample, 961 struct perf_tool *tool, 962 u64 file_offset) 963 { 964 struct perf_evsel *evsel; 965 struct machine *machine; 966 967 dump_event(session, event, file_offset, sample); 968 969 evsel = perf_evlist__id2evsel(session->evlist, sample->id); 970 if (evsel != NULL && event->header.type != PERF_RECORD_SAMPLE) { 971 /* 972 * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here 973 * because the tools right now may apply filters, discarding 974 * some of the samples. For consistency, in the future we 975 * should have something like nr_filtered_samples and remove 976 * the sample->period from total_sample_period, etc, KISS for 977 * now tho. 978 * 979 * Also testing against NULL allows us to handle files without 980 * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the 981 * future probably it'll be a good idea to restrict event 982 * processing via perf_session to files with both set. 983 */ 984 hists__inc_nr_events(&evsel->hists, event->header.type); 985 } 986 987 machine = perf_session__find_machine_for_cpumode(session, event, 988 sample); 989 990 switch (event->header.type) { 991 case PERF_RECORD_SAMPLE: 992 dump_sample(evsel, event, sample); 993 if (evsel == NULL) { 994 ++session->stats.nr_unknown_id; 995 return 0; 996 } 997 if (machine == NULL) { 998 ++session->stats.nr_unprocessable_samples; 999 return 0; 1000 } 1001 return perf_session__deliver_sample(session, tool, event, 1002 sample, evsel, machine); 1003 case PERF_RECORD_MMAP: 1004 return tool->mmap(tool, event, sample, machine); 1005 case PERF_RECORD_MMAP2: 1006 return tool->mmap2(tool, event, sample, machine); 1007 case PERF_RECORD_COMM: 1008 return tool->comm(tool, event, sample, machine); 1009 case PERF_RECORD_FORK: 1010 return tool->fork(tool, event, sample, machine); 1011 case PERF_RECORD_EXIT: 1012 return tool->exit(tool, event, sample, machine); 1013 case PERF_RECORD_LOST: 1014 if (tool->lost == perf_event__process_lost) 1015 session->stats.total_lost += event->lost.lost; 1016 return tool->lost(tool, event, sample, machine); 1017 case PERF_RECORD_READ: 1018 return tool->read(tool, event, sample, evsel, machine); 1019 case PERF_RECORD_THROTTLE: 1020 return tool->throttle(tool, event, sample, machine); 1021 case PERF_RECORD_UNTHROTTLE: 1022 return tool->unthrottle(tool, event, sample, machine); 1023 default: 1024 ++session->stats.nr_unknown_events; 1025 return -1; 1026 } 1027 } 1028 1029 static int perf_session__process_user_event(struct perf_session *session, union perf_event *event, 1030 struct perf_tool *tool, u64 file_offset) 1031 { 1032 int err; 1033 1034 dump_event(session, event, file_offset, NULL); 1035 1036 /* These events are processed right away */ 1037 switch (event->header.type) { 1038 case PERF_RECORD_HEADER_ATTR: 1039 err = tool->attr(tool, event, &session->evlist); 1040 if (err == 0) 1041 perf_session__set_id_hdr_size(session); 1042 return err; 1043 case PERF_RECORD_HEADER_TRACING_DATA: 1044 /* setup for reading amidst mmap */ 1045 lseek(session->fd, file_offset, SEEK_SET); 1046 return tool->tracing_data(tool, event, session); 1047 case PERF_RECORD_HEADER_BUILD_ID: 1048 return tool->build_id(tool, event, session); 1049 case PERF_RECORD_FINISHED_ROUND: 1050 return tool->finished_round(tool, event, session); 1051 default: 1052 return -EINVAL; 1053 } 1054 } 1055 1056 static void event_swap(union perf_event *event, bool sample_id_all) 1057 { 1058 perf_event__swap_op swap; 1059 1060 swap = perf_event__swap_ops[event->header.type]; 1061 if (swap) 1062 swap(event, sample_id_all); 1063 } 1064 1065 static int perf_session__process_event(struct perf_session *session, 1066 union perf_event *event, 1067 struct perf_tool *tool, 1068 u64 file_offset) 1069 { 1070 struct perf_sample sample; 1071 int ret; 1072 1073 if (session->header.needs_swap) 1074 event_swap(event, perf_evlist__sample_id_all(session->evlist)); 1075 1076 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1077 return -EINVAL; 1078 1079 events_stats__inc(&session->stats, event->header.type); 1080 1081 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1082 return perf_session__process_user_event(session, event, tool, file_offset); 1083 1084 /* 1085 * For all kernel events we get the sample data 1086 */ 1087 ret = perf_evlist__parse_sample(session->evlist, event, &sample); 1088 if (ret) 1089 return ret; 1090 1091 if (tool->ordered_samples) { 1092 ret = perf_session_queue_event(session, event, &sample, 1093 file_offset); 1094 if (ret != -ETIME) 1095 return ret; 1096 } 1097 1098 return perf_session_deliver_event(session, event, &sample, tool, 1099 file_offset); 1100 } 1101 1102 void perf_event_header__bswap(struct perf_event_header *self) 1103 { 1104 self->type = bswap_32(self->type); 1105 self->misc = bswap_16(self->misc); 1106 self->size = bswap_16(self->size); 1107 } 1108 1109 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1110 { 1111 return machine__findnew_thread(&session->machines.host, 0, pid); 1112 } 1113 1114 static struct thread *perf_session__register_idle_thread(struct perf_session *self) 1115 { 1116 struct thread *thread = perf_session__findnew(self, 0); 1117 1118 if (thread == NULL || thread__set_comm(thread, "swapper")) { 1119 pr_err("problem inserting idle task.\n"); 1120 thread = NULL; 1121 } 1122 1123 return thread; 1124 } 1125 1126 static void perf_session__warn_about_errors(const struct perf_session *session, 1127 const struct perf_tool *tool) 1128 { 1129 if (tool->lost == perf_event__process_lost && 1130 session->stats.nr_events[PERF_RECORD_LOST] != 0) { 1131 ui__warning("Processed %d events and lost %d chunks!\n\n" 1132 "Check IO/CPU overload!\n\n", 1133 session->stats.nr_events[0], 1134 session->stats.nr_events[PERF_RECORD_LOST]); 1135 } 1136 1137 if (session->stats.nr_unknown_events != 0) { 1138 ui__warning("Found %u unknown events!\n\n" 1139 "Is this an older tool processing a perf.data " 1140 "file generated by a more recent tool?\n\n" 1141 "If that is not the case, consider " 1142 "reporting to linux-kernel@vger.kernel.org.\n\n", 1143 session->stats.nr_unknown_events); 1144 } 1145 1146 if (session->stats.nr_unknown_id != 0) { 1147 ui__warning("%u samples with id not present in the header\n", 1148 session->stats.nr_unknown_id); 1149 } 1150 1151 if (session->stats.nr_invalid_chains != 0) { 1152 ui__warning("Found invalid callchains!\n\n" 1153 "%u out of %u events were discarded for this reason.\n\n" 1154 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1155 session->stats.nr_invalid_chains, 1156 session->stats.nr_events[PERF_RECORD_SAMPLE]); 1157 } 1158 1159 if (session->stats.nr_unprocessable_samples != 0) { 1160 ui__warning("%u unprocessable samples recorded.\n" 1161 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1162 session->stats.nr_unprocessable_samples); 1163 } 1164 } 1165 1166 volatile int session_done; 1167 1168 static int __perf_session__process_pipe_events(struct perf_session *self, 1169 struct perf_tool *tool) 1170 { 1171 union perf_event *event; 1172 uint32_t size, cur_size = 0; 1173 void *buf = NULL; 1174 int skip = 0; 1175 u64 head; 1176 int err; 1177 void *p; 1178 1179 perf_tool__fill_defaults(tool); 1180 1181 head = 0; 1182 cur_size = sizeof(union perf_event); 1183 1184 buf = malloc(cur_size); 1185 if (!buf) 1186 return -errno; 1187 more: 1188 event = buf; 1189 err = readn(self->fd, event, sizeof(struct perf_event_header)); 1190 if (err <= 0) { 1191 if (err == 0) 1192 goto done; 1193 1194 pr_err("failed to read event header\n"); 1195 goto out_err; 1196 } 1197 1198 if (self->header.needs_swap) 1199 perf_event_header__bswap(&event->header); 1200 1201 size = event->header.size; 1202 if (size < sizeof(struct perf_event_header)) { 1203 pr_err("bad event header size\n"); 1204 goto out_err; 1205 } 1206 1207 if (size > cur_size) { 1208 void *new = realloc(buf, size); 1209 if (!new) { 1210 pr_err("failed to allocate memory to read event\n"); 1211 goto out_err; 1212 } 1213 buf = new; 1214 cur_size = size; 1215 event = buf; 1216 } 1217 p = event; 1218 p += sizeof(struct perf_event_header); 1219 1220 if (size - sizeof(struct perf_event_header)) { 1221 err = readn(self->fd, p, size - sizeof(struct perf_event_header)); 1222 if (err <= 0) { 1223 if (err == 0) { 1224 pr_err("unexpected end of event stream\n"); 1225 goto done; 1226 } 1227 1228 pr_err("failed to read event data\n"); 1229 goto out_err; 1230 } 1231 } 1232 1233 if ((skip = perf_session__process_event(self, event, tool, head)) < 0) { 1234 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1235 head, event->header.size, event->header.type); 1236 err = -EINVAL; 1237 goto out_err; 1238 } 1239 1240 head += size; 1241 1242 if (skip > 0) 1243 head += skip; 1244 1245 if (!session_done()) 1246 goto more; 1247 done: 1248 err = 0; 1249 out_err: 1250 free(buf); 1251 perf_session__warn_about_errors(self, tool); 1252 perf_session_free_sample_buffers(self); 1253 return err; 1254 } 1255 1256 static union perf_event * 1257 fetch_mmaped_event(struct perf_session *session, 1258 u64 head, size_t mmap_size, char *buf) 1259 { 1260 union perf_event *event; 1261 1262 /* 1263 * Ensure we have enough space remaining to read 1264 * the size of the event in the headers. 1265 */ 1266 if (head + sizeof(event->header) > mmap_size) 1267 return NULL; 1268 1269 event = (union perf_event *)(buf + head); 1270 1271 if (session->header.needs_swap) 1272 perf_event_header__bswap(&event->header); 1273 1274 if (head + event->header.size > mmap_size) { 1275 /* We're not fetching the event so swap back again */ 1276 if (session->header.needs_swap) 1277 perf_event_header__bswap(&event->header); 1278 return NULL; 1279 } 1280 1281 return event; 1282 } 1283 1284 /* 1285 * On 64bit we can mmap the data file in one go. No need for tiny mmap 1286 * slices. On 32bit we use 32MB. 1287 */ 1288 #if BITS_PER_LONG == 64 1289 #define MMAP_SIZE ULLONG_MAX 1290 #define NUM_MMAPS 1 1291 #else 1292 #define MMAP_SIZE (32 * 1024 * 1024ULL) 1293 #define NUM_MMAPS 128 1294 #endif 1295 1296 int __perf_session__process_events(struct perf_session *session, 1297 u64 data_offset, u64 data_size, 1298 u64 file_size, struct perf_tool *tool) 1299 { 1300 u64 head, page_offset, file_offset, file_pos, progress_next; 1301 int err, mmap_prot, mmap_flags, map_idx = 0; 1302 size_t mmap_size; 1303 char *buf, *mmaps[NUM_MMAPS]; 1304 union perf_event *event; 1305 uint32_t size; 1306 1307 perf_tool__fill_defaults(tool); 1308 1309 page_offset = page_size * (data_offset / page_size); 1310 file_offset = page_offset; 1311 head = data_offset - page_offset; 1312 1313 if (data_offset + data_size < file_size) 1314 file_size = data_offset + data_size; 1315 1316 progress_next = file_size / 16; 1317 1318 mmap_size = MMAP_SIZE; 1319 if (mmap_size > file_size) 1320 mmap_size = file_size; 1321 1322 memset(mmaps, 0, sizeof(mmaps)); 1323 1324 mmap_prot = PROT_READ; 1325 mmap_flags = MAP_SHARED; 1326 1327 if (session->header.needs_swap) { 1328 mmap_prot |= PROT_WRITE; 1329 mmap_flags = MAP_PRIVATE; 1330 } 1331 remap: 1332 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, session->fd, 1333 file_offset); 1334 if (buf == MAP_FAILED) { 1335 pr_err("failed to mmap file\n"); 1336 err = -errno; 1337 goto out_err; 1338 } 1339 mmaps[map_idx] = buf; 1340 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 1341 file_pos = file_offset + head; 1342 1343 more: 1344 event = fetch_mmaped_event(session, head, mmap_size, buf); 1345 if (!event) { 1346 if (mmaps[map_idx]) { 1347 munmap(mmaps[map_idx], mmap_size); 1348 mmaps[map_idx] = NULL; 1349 } 1350 1351 page_offset = page_size * (head / page_size); 1352 file_offset += page_offset; 1353 head -= page_offset; 1354 goto remap; 1355 } 1356 1357 size = event->header.size; 1358 1359 if (size < sizeof(struct perf_event_header) || 1360 perf_session__process_event(session, event, tool, file_pos) < 0) { 1361 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1362 file_offset + head, event->header.size, 1363 event->header.type); 1364 err = -EINVAL; 1365 goto out_err; 1366 } 1367 1368 head += size; 1369 file_pos += size; 1370 1371 if (file_pos >= progress_next) { 1372 progress_next += file_size / 16; 1373 ui_progress__update(file_pos, file_size, 1374 "Processing events..."); 1375 } 1376 1377 err = 0; 1378 if (session_done()) 1379 goto out_err; 1380 1381 if (file_pos < file_size) 1382 goto more; 1383 1384 /* do the final flush for ordered samples */ 1385 session->ordered_samples.next_flush = ULLONG_MAX; 1386 err = flush_sample_queue(session, tool); 1387 out_err: 1388 ui_progress__finish(); 1389 perf_session__warn_about_errors(session, tool); 1390 perf_session_free_sample_buffers(session); 1391 return err; 1392 } 1393 1394 int perf_session__process_events(struct perf_session *self, 1395 struct perf_tool *tool) 1396 { 1397 int err; 1398 1399 if (perf_session__register_idle_thread(self) == NULL) 1400 return -ENOMEM; 1401 1402 if (!self->fd_pipe) 1403 err = __perf_session__process_events(self, 1404 self->header.data_offset, 1405 self->header.data_size, 1406 self->size, tool); 1407 else 1408 err = __perf_session__process_pipe_events(self, tool); 1409 1410 return err; 1411 } 1412 1413 bool perf_session__has_traces(struct perf_session *session, const char *msg) 1414 { 1415 struct perf_evsel *evsel; 1416 1417 list_for_each_entry(evsel, &session->evlist->entries, node) { 1418 if (evsel->attr.type == PERF_TYPE_TRACEPOINT) 1419 return true; 1420 } 1421 1422 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 1423 return false; 1424 } 1425 1426 int maps__set_kallsyms_ref_reloc_sym(struct map **maps, 1427 const char *symbol_name, u64 addr) 1428 { 1429 char *bracket; 1430 enum map_type i; 1431 struct ref_reloc_sym *ref; 1432 1433 ref = zalloc(sizeof(struct ref_reloc_sym)); 1434 if (ref == NULL) 1435 return -ENOMEM; 1436 1437 ref->name = strdup(symbol_name); 1438 if (ref->name == NULL) { 1439 free(ref); 1440 return -ENOMEM; 1441 } 1442 1443 bracket = strchr(ref->name, ']'); 1444 if (bracket) 1445 *bracket = '\0'; 1446 1447 ref->addr = addr; 1448 1449 for (i = 0; i < MAP__NR_TYPES; ++i) { 1450 struct kmap *kmap = map__kmap(maps[i]); 1451 kmap->ref_reloc_sym = ref; 1452 } 1453 1454 return 0; 1455 } 1456 1457 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp) 1458 { 1459 return machines__fprintf_dsos(&self->machines, fp); 1460 } 1461 1462 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp, 1463 bool (skip)(struct dso *dso, int parm), int parm) 1464 { 1465 return machines__fprintf_dsos_buildid(&self->machines, fp, skip, parm); 1466 } 1467 1468 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 1469 { 1470 struct perf_evsel *pos; 1471 size_t ret = fprintf(fp, "Aggregated stats:\n"); 1472 1473 ret += events_stats__fprintf(&session->stats, fp); 1474 1475 list_for_each_entry(pos, &session->evlist->entries, node) { 1476 ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos)); 1477 ret += events_stats__fprintf(&pos->hists.stats, fp); 1478 } 1479 1480 return ret; 1481 } 1482 1483 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 1484 { 1485 /* 1486 * FIXME: Here we have to actually print all the machines in this 1487 * session, not just the host... 1488 */ 1489 return machine__fprintf(&session->machines.host, fp); 1490 } 1491 1492 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, 1493 unsigned int type) 1494 { 1495 struct perf_evsel *pos; 1496 1497 list_for_each_entry(pos, &session->evlist->entries, node) { 1498 if (pos->attr.type == type) 1499 return pos; 1500 } 1501 return NULL; 1502 } 1503 1504 void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event, 1505 struct perf_sample *sample, struct machine *machine, 1506 unsigned int print_opts, unsigned int stack_depth) 1507 { 1508 struct addr_location al; 1509 struct callchain_cursor_node *node; 1510 int print_ip = print_opts & PRINT_IP_OPT_IP; 1511 int print_sym = print_opts & PRINT_IP_OPT_SYM; 1512 int print_dso = print_opts & PRINT_IP_OPT_DSO; 1513 int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET; 1514 int print_oneline = print_opts & PRINT_IP_OPT_ONELINE; 1515 char s = print_oneline ? ' ' : '\t'; 1516 1517 if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) { 1518 error("problem processing %d event, skipping it.\n", 1519 event->header.type); 1520 return; 1521 } 1522 1523 if (symbol_conf.use_callchain && sample->callchain) { 1524 1525 if (machine__resolve_callchain(machine, evsel, al.thread, 1526 sample, NULL, NULL) != 0) { 1527 if (verbose) 1528 error("Failed to resolve callchain. Skipping\n"); 1529 return; 1530 } 1531 callchain_cursor_commit(&callchain_cursor); 1532 1533 while (stack_depth) { 1534 node = callchain_cursor_current(&callchain_cursor); 1535 if (!node) 1536 break; 1537 1538 if (print_ip) 1539 printf("%c%16" PRIx64, s, node->ip); 1540 1541 if (print_sym) { 1542 printf(" "); 1543 if (print_symoffset) { 1544 al.addr = node->ip; 1545 al.map = node->map; 1546 symbol__fprintf_symname_offs(node->sym, &al, stdout); 1547 } else 1548 symbol__fprintf_symname(node->sym, stdout); 1549 } 1550 1551 if (print_dso) { 1552 printf(" ("); 1553 map__fprintf_dsoname(node->map, stdout); 1554 printf(")"); 1555 } 1556 1557 if (!print_oneline) 1558 printf("\n"); 1559 1560 callchain_cursor_advance(&callchain_cursor); 1561 1562 stack_depth--; 1563 } 1564 1565 } else { 1566 if (print_ip) 1567 printf("%16" PRIx64, sample->ip); 1568 1569 if (print_sym) { 1570 printf(" "); 1571 if (print_symoffset) 1572 symbol__fprintf_symname_offs(al.sym, &al, 1573 stdout); 1574 else 1575 symbol__fprintf_symname(al.sym, stdout); 1576 } 1577 1578 if (print_dso) { 1579 printf(" ("); 1580 map__fprintf_dsoname(al.map, stdout); 1581 printf(")"); 1582 } 1583 } 1584 } 1585 1586 int perf_session__cpu_bitmap(struct perf_session *session, 1587 const char *cpu_list, unsigned long *cpu_bitmap) 1588 { 1589 int i; 1590 struct cpu_map *map; 1591 1592 for (i = 0; i < PERF_TYPE_MAX; ++i) { 1593 struct perf_evsel *evsel; 1594 1595 evsel = perf_session__find_first_evtype(session, i); 1596 if (!evsel) 1597 continue; 1598 1599 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) { 1600 pr_err("File does not contain CPU events. " 1601 "Remove -c option to proceed.\n"); 1602 return -1; 1603 } 1604 } 1605 1606 map = cpu_map__new(cpu_list); 1607 if (map == NULL) { 1608 pr_err("Invalid cpu_list\n"); 1609 return -1; 1610 } 1611 1612 for (i = 0; i < map->nr; i++) { 1613 int cpu = map->map[i]; 1614 1615 if (cpu >= MAX_NR_CPUS) { 1616 pr_err("Requested CPU %d too large. " 1617 "Consider raising MAX_NR_CPUS\n", cpu); 1618 return -1; 1619 } 1620 1621 set_bit(cpu, cpu_bitmap); 1622 } 1623 1624 return 0; 1625 } 1626 1627 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 1628 bool full) 1629 { 1630 struct stat st; 1631 int ret; 1632 1633 if (session == NULL || fp == NULL) 1634 return; 1635 1636 ret = fstat(session->fd, &st); 1637 if (ret == -1) 1638 return; 1639 1640 fprintf(fp, "# ========\n"); 1641 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime)); 1642 perf_header__fprintf_info(session, fp, full); 1643 fprintf(fp, "# ========\n#\n"); 1644 } 1645 1646 1647 int __perf_session__set_tracepoints_handlers(struct perf_session *session, 1648 const struct perf_evsel_str_handler *assocs, 1649 size_t nr_assocs) 1650 { 1651 struct perf_evsel *evsel; 1652 size_t i; 1653 int err; 1654 1655 for (i = 0; i < nr_assocs; i++) { 1656 /* 1657 * Adding a handler for an event not in the session, 1658 * just ignore it. 1659 */ 1660 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name); 1661 if (evsel == NULL) 1662 continue; 1663 1664 err = -EEXIST; 1665 if (evsel->handler.func != NULL) 1666 goto out; 1667 evsel->handler.func = assocs[i].handler; 1668 } 1669 1670 err = 0; 1671 out: 1672 return err; 1673 } 1674