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->mmap2 == NULL) 260 tool->mmap2 = process_event_stub; 261 if (tool->comm == NULL) 262 tool->comm = process_event_stub; 263 if (tool->fork == NULL) 264 tool->fork = process_event_stub; 265 if (tool->exit == NULL) 266 tool->exit = process_event_stub; 267 if (tool->lost == NULL) 268 tool->lost = perf_event__process_lost; 269 if (tool->read == NULL) 270 tool->read = process_event_sample_stub; 271 if (tool->throttle == NULL) 272 tool->throttle = process_event_stub; 273 if (tool->unthrottle == NULL) 274 tool->unthrottle = process_event_stub; 275 if (tool->attr == NULL) 276 tool->attr = process_event_synth_attr_stub; 277 if (tool->tracing_data == NULL) 278 tool->tracing_data = process_event_synth_tracing_data_stub; 279 if (tool->build_id == NULL) 280 tool->build_id = process_finished_round_stub; 281 if (tool->finished_round == NULL) { 282 if (tool->ordered_samples) 283 tool->finished_round = process_finished_round; 284 else 285 tool->finished_round = process_finished_round_stub; 286 } 287 } 288 289 void mem_bswap_32(void *src, int byte_size) 290 { 291 u32 *m = src; 292 while (byte_size > 0) { 293 *m = bswap_32(*m); 294 byte_size -= sizeof(u32); 295 ++m; 296 } 297 } 298 299 void mem_bswap_64(void *src, int byte_size) 300 { 301 u64 *m = src; 302 303 while (byte_size > 0) { 304 *m = bswap_64(*m); 305 byte_size -= sizeof(u64); 306 ++m; 307 } 308 } 309 310 static void swap_sample_id_all(union perf_event *event, void *data) 311 { 312 void *end = (void *) event + event->header.size; 313 int size = end - data; 314 315 BUG_ON(size % sizeof(u64)); 316 mem_bswap_64(data, size); 317 } 318 319 static void perf_event__all64_swap(union perf_event *event, 320 bool sample_id_all __maybe_unused) 321 { 322 struct perf_event_header *hdr = &event->header; 323 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 324 } 325 326 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 327 { 328 event->comm.pid = bswap_32(event->comm.pid); 329 event->comm.tid = bswap_32(event->comm.tid); 330 331 if (sample_id_all) { 332 void *data = &event->comm.comm; 333 334 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 335 swap_sample_id_all(event, data); 336 } 337 } 338 339 static void perf_event__mmap_swap(union perf_event *event, 340 bool sample_id_all) 341 { 342 event->mmap.pid = bswap_32(event->mmap.pid); 343 event->mmap.tid = bswap_32(event->mmap.tid); 344 event->mmap.start = bswap_64(event->mmap.start); 345 event->mmap.len = bswap_64(event->mmap.len); 346 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 347 348 if (sample_id_all) { 349 void *data = &event->mmap.filename; 350 351 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 352 swap_sample_id_all(event, data); 353 } 354 } 355 356 static void perf_event__mmap2_swap(union perf_event *event, 357 bool sample_id_all) 358 { 359 event->mmap2.pid = bswap_32(event->mmap2.pid); 360 event->mmap2.tid = bswap_32(event->mmap2.tid); 361 event->mmap2.start = bswap_64(event->mmap2.start); 362 event->mmap2.len = bswap_64(event->mmap2.len); 363 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); 364 event->mmap2.maj = bswap_32(event->mmap2.maj); 365 event->mmap2.min = bswap_32(event->mmap2.min); 366 event->mmap2.ino = bswap_64(event->mmap2.ino); 367 368 if (sample_id_all) { 369 void *data = &event->mmap2.filename; 370 371 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 372 swap_sample_id_all(event, data); 373 } 374 } 375 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 376 { 377 event->fork.pid = bswap_32(event->fork.pid); 378 event->fork.tid = bswap_32(event->fork.tid); 379 event->fork.ppid = bswap_32(event->fork.ppid); 380 event->fork.ptid = bswap_32(event->fork.ptid); 381 event->fork.time = bswap_64(event->fork.time); 382 383 if (sample_id_all) 384 swap_sample_id_all(event, &event->fork + 1); 385 } 386 387 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 388 { 389 event->read.pid = bswap_32(event->read.pid); 390 event->read.tid = bswap_32(event->read.tid); 391 event->read.value = bswap_64(event->read.value); 392 event->read.time_enabled = bswap_64(event->read.time_enabled); 393 event->read.time_running = bswap_64(event->read.time_running); 394 event->read.id = bswap_64(event->read.id); 395 396 if (sample_id_all) 397 swap_sample_id_all(event, &event->read + 1); 398 } 399 400 static u8 revbyte(u8 b) 401 { 402 int rev = (b >> 4) | ((b & 0xf) << 4); 403 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 404 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 405 return (u8) rev; 406 } 407 408 /* 409 * XXX this is hack in attempt to carry flags bitfield 410 * throught endian village. ABI says: 411 * 412 * Bit-fields are allocated from right to left (least to most significant) 413 * on little-endian implementations and from left to right (most to least 414 * significant) on big-endian implementations. 415 * 416 * The above seems to be byte specific, so we need to reverse each 417 * byte of the bitfield. 'Internet' also says this might be implementation 418 * specific and we probably need proper fix and carry perf_event_attr 419 * bitfield flags in separate data file FEAT_ section. Thought this seems 420 * to work for now. 421 */ 422 static void swap_bitfield(u8 *p, unsigned len) 423 { 424 unsigned i; 425 426 for (i = 0; i < len; i++) { 427 *p = revbyte(*p); 428 p++; 429 } 430 } 431 432 /* exported for swapping attributes in file header */ 433 void perf_event__attr_swap(struct perf_event_attr *attr) 434 { 435 attr->type = bswap_32(attr->type); 436 attr->size = bswap_32(attr->size); 437 attr->config = bswap_64(attr->config); 438 attr->sample_period = bswap_64(attr->sample_period); 439 attr->sample_type = bswap_64(attr->sample_type); 440 attr->read_format = bswap_64(attr->read_format); 441 attr->wakeup_events = bswap_32(attr->wakeup_events); 442 attr->bp_type = bswap_32(attr->bp_type); 443 attr->bp_addr = bswap_64(attr->bp_addr); 444 attr->bp_len = bswap_64(attr->bp_len); 445 446 swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64)); 447 } 448 449 static void perf_event__hdr_attr_swap(union perf_event *event, 450 bool sample_id_all __maybe_unused) 451 { 452 size_t size; 453 454 perf_event__attr_swap(&event->attr.attr); 455 456 size = event->header.size; 457 size -= (void *)&event->attr.id - (void *)event; 458 mem_bswap_64(event->attr.id, size); 459 } 460 461 static void perf_event__event_type_swap(union perf_event *event, 462 bool sample_id_all __maybe_unused) 463 { 464 event->event_type.event_type.event_id = 465 bswap_64(event->event_type.event_type.event_id); 466 } 467 468 static void perf_event__tracing_data_swap(union perf_event *event, 469 bool sample_id_all __maybe_unused) 470 { 471 event->tracing_data.size = bswap_32(event->tracing_data.size); 472 } 473 474 typedef void (*perf_event__swap_op)(union perf_event *event, 475 bool sample_id_all); 476 477 static perf_event__swap_op perf_event__swap_ops[] = { 478 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 479 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap, 480 [PERF_RECORD_COMM] = perf_event__comm_swap, 481 [PERF_RECORD_FORK] = perf_event__task_swap, 482 [PERF_RECORD_EXIT] = perf_event__task_swap, 483 [PERF_RECORD_LOST] = perf_event__all64_swap, 484 [PERF_RECORD_READ] = perf_event__read_swap, 485 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 486 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 487 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 488 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 489 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 490 [PERF_RECORD_HEADER_MAX] = NULL, 491 }; 492 493 struct sample_queue { 494 u64 timestamp; 495 u64 file_offset; 496 union perf_event *event; 497 struct list_head list; 498 }; 499 500 static void perf_session_free_sample_buffers(struct perf_session *session) 501 { 502 struct ordered_samples *os = &session->ordered_samples; 503 504 while (!list_empty(&os->to_free)) { 505 struct sample_queue *sq; 506 507 sq = list_entry(os->to_free.next, struct sample_queue, list); 508 list_del(&sq->list); 509 free(sq); 510 } 511 } 512 513 static int perf_session_deliver_event(struct perf_session *session, 514 union perf_event *event, 515 struct perf_sample *sample, 516 struct perf_tool *tool, 517 u64 file_offset); 518 519 static int flush_sample_queue(struct perf_session *s, 520 struct perf_tool *tool) 521 { 522 struct ordered_samples *os = &s->ordered_samples; 523 struct list_head *head = &os->samples; 524 struct sample_queue *tmp, *iter; 525 struct perf_sample sample; 526 u64 limit = os->next_flush; 527 u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL; 528 unsigned idx = 0, progress_next = os->nr_samples / 16; 529 bool show_progress = limit == ULLONG_MAX; 530 int ret; 531 532 if (!tool->ordered_samples || !limit) 533 return 0; 534 535 list_for_each_entry_safe(iter, tmp, head, list) { 536 if (session_done()) 537 return 0; 538 539 if (iter->timestamp > limit) 540 break; 541 542 ret = perf_evlist__parse_sample(s->evlist, iter->event, &sample); 543 if (ret) 544 pr_err("Can't parse sample, err = %d\n", ret); 545 else { 546 ret = perf_session_deliver_event(s, iter->event, &sample, tool, 547 iter->file_offset); 548 if (ret) 549 return ret; 550 } 551 552 os->last_flush = iter->timestamp; 553 list_del(&iter->list); 554 list_add(&iter->list, &os->sample_cache); 555 if (show_progress && (++idx >= progress_next)) { 556 progress_next += os->nr_samples / 16; 557 ui_progress__update(idx, os->nr_samples, 558 "Processing time ordered events..."); 559 } 560 } 561 562 if (list_empty(head)) { 563 os->last_sample = NULL; 564 } else if (last_ts <= limit) { 565 os->last_sample = 566 list_entry(head->prev, struct sample_queue, list); 567 } 568 569 os->nr_samples = 0; 570 571 return 0; 572 } 573 574 /* 575 * When perf record finishes a pass on every buffers, it records this pseudo 576 * event. 577 * We record the max timestamp t found in the pass n. 578 * Assuming these timestamps are monotonic across cpus, we know that if 579 * a buffer still has events with timestamps below t, they will be all 580 * available and then read in the pass n + 1. 581 * Hence when we start to read the pass n + 2, we can safely flush every 582 * events with timestamps below t. 583 * 584 * ============ PASS n ================= 585 * CPU 0 | CPU 1 586 * | 587 * cnt1 timestamps | cnt2 timestamps 588 * 1 | 2 589 * 2 | 3 590 * - | 4 <--- max recorded 591 * 592 * ============ PASS n + 1 ============== 593 * CPU 0 | CPU 1 594 * | 595 * cnt1 timestamps | cnt2 timestamps 596 * 3 | 5 597 * 4 | 6 598 * 5 | 7 <---- max recorded 599 * 600 * Flush every events below timestamp 4 601 * 602 * ============ PASS n + 2 ============== 603 * CPU 0 | CPU 1 604 * | 605 * cnt1 timestamps | cnt2 timestamps 606 * 6 | 8 607 * 7 | 9 608 * - | 10 609 * 610 * Flush every events below timestamp 7 611 * etc... 612 */ 613 static int process_finished_round(struct perf_tool *tool, 614 union perf_event *event __maybe_unused, 615 struct perf_session *session) 616 { 617 int ret = flush_sample_queue(session, tool); 618 if (!ret) 619 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp; 620 621 return ret; 622 } 623 624 /* The queue is ordered by time */ 625 static void __queue_event(struct sample_queue *new, struct perf_session *s) 626 { 627 struct ordered_samples *os = &s->ordered_samples; 628 struct sample_queue *sample = os->last_sample; 629 u64 timestamp = new->timestamp; 630 struct list_head *p; 631 632 ++os->nr_samples; 633 os->last_sample = new; 634 635 if (!sample) { 636 list_add(&new->list, &os->samples); 637 os->max_timestamp = timestamp; 638 return; 639 } 640 641 /* 642 * last_sample might point to some random place in the list as it's 643 * the last queued event. We expect that the new event is close to 644 * this. 645 */ 646 if (sample->timestamp <= timestamp) { 647 while (sample->timestamp <= timestamp) { 648 p = sample->list.next; 649 if (p == &os->samples) { 650 list_add_tail(&new->list, &os->samples); 651 os->max_timestamp = timestamp; 652 return; 653 } 654 sample = list_entry(p, struct sample_queue, list); 655 } 656 list_add_tail(&new->list, &sample->list); 657 } else { 658 while (sample->timestamp > timestamp) { 659 p = sample->list.prev; 660 if (p == &os->samples) { 661 list_add(&new->list, &os->samples); 662 return; 663 } 664 sample = list_entry(p, struct sample_queue, list); 665 } 666 list_add(&new->list, &sample->list); 667 } 668 } 669 670 #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue)) 671 672 int perf_session_queue_event(struct perf_session *s, union perf_event *event, 673 struct perf_sample *sample, u64 file_offset) 674 { 675 struct ordered_samples *os = &s->ordered_samples; 676 struct list_head *sc = &os->sample_cache; 677 u64 timestamp = sample->time; 678 struct sample_queue *new; 679 680 if (!timestamp || timestamp == ~0ULL) 681 return -ETIME; 682 683 if (timestamp < s->ordered_samples.last_flush) { 684 printf("Warning: Timestamp below last timeslice flush\n"); 685 return -EINVAL; 686 } 687 688 if (!list_empty(sc)) { 689 new = list_entry(sc->next, struct sample_queue, list); 690 list_del(&new->list); 691 } else if (os->sample_buffer) { 692 new = os->sample_buffer + os->sample_buffer_idx; 693 if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER) 694 os->sample_buffer = NULL; 695 } else { 696 os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new)); 697 if (!os->sample_buffer) 698 return -ENOMEM; 699 list_add(&os->sample_buffer->list, &os->to_free); 700 os->sample_buffer_idx = 2; 701 new = os->sample_buffer + 1; 702 } 703 704 new->timestamp = timestamp; 705 new->file_offset = file_offset; 706 new->event = event; 707 708 __queue_event(new, s); 709 710 return 0; 711 } 712 713 static void callchain__printf(struct perf_sample *sample) 714 { 715 unsigned int i; 716 717 printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr); 718 719 for (i = 0; i < sample->callchain->nr; i++) 720 printf("..... %2d: %016" PRIx64 "\n", 721 i, sample->callchain->ips[i]); 722 } 723 724 static void branch_stack__printf(struct perf_sample *sample) 725 { 726 uint64_t i; 727 728 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr); 729 730 for (i = 0; i < sample->branch_stack->nr; i++) 731 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n", 732 i, sample->branch_stack->entries[i].from, 733 sample->branch_stack->entries[i].to); 734 } 735 736 static void regs_dump__printf(u64 mask, u64 *regs) 737 { 738 unsigned rid, i = 0; 739 740 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { 741 u64 val = regs[i++]; 742 743 printf(".... %-5s 0x%" PRIx64 "\n", 744 perf_reg_name(rid), val); 745 } 746 } 747 748 static void regs_user__printf(struct perf_sample *sample, u64 mask) 749 { 750 struct regs_dump *user_regs = &sample->user_regs; 751 752 if (user_regs->regs) { 753 printf("... user regs: mask 0x%" PRIx64 "\n", mask); 754 regs_dump__printf(mask, user_regs->regs); 755 } 756 } 757 758 static void stack_user__printf(struct stack_dump *dump) 759 { 760 printf("... ustack: size %" PRIu64 ", offset 0x%x\n", 761 dump->size, dump->offset); 762 } 763 764 static void perf_session__print_tstamp(struct perf_session *session, 765 union perf_event *event, 766 struct perf_sample *sample) 767 { 768 u64 sample_type = __perf_evlist__combined_sample_type(session->evlist); 769 770 if (event->header.type != PERF_RECORD_SAMPLE && 771 !perf_evlist__sample_id_all(session->evlist)) { 772 fputs("-1 -1 ", stdout); 773 return; 774 } 775 776 if ((sample_type & PERF_SAMPLE_CPU)) 777 printf("%u ", sample->cpu); 778 779 if (sample_type & PERF_SAMPLE_TIME) 780 printf("%" PRIu64 " ", sample->time); 781 } 782 783 static void sample_read__printf(struct perf_sample *sample, u64 read_format) 784 { 785 printf("... sample_read:\n"); 786 787 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 788 printf("...... time enabled %016" PRIx64 "\n", 789 sample->read.time_enabled); 790 791 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 792 printf("...... time running %016" PRIx64 "\n", 793 sample->read.time_running); 794 795 if (read_format & PERF_FORMAT_GROUP) { 796 u64 i; 797 798 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr); 799 800 for (i = 0; i < sample->read.group.nr; i++) { 801 struct sample_read_value *value; 802 803 value = &sample->read.group.values[i]; 804 printf("..... id %016" PRIx64 805 ", value %016" PRIx64 "\n", 806 value->id, value->value); 807 } 808 } else 809 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n", 810 sample->read.one.id, sample->read.one.value); 811 } 812 813 static void dump_event(struct perf_session *session, union perf_event *event, 814 u64 file_offset, struct perf_sample *sample) 815 { 816 if (!dump_trace) 817 return; 818 819 printf("\n%#" PRIx64 " [%#x]: event: %d\n", 820 file_offset, event->header.size, event->header.type); 821 822 trace_event(event); 823 824 if (sample) 825 perf_session__print_tstamp(session, event, sample); 826 827 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 828 event->header.size, perf_event__name(event->header.type)); 829 } 830 831 static void dump_sample(struct perf_evsel *evsel, union perf_event *event, 832 struct perf_sample *sample) 833 { 834 u64 sample_type; 835 836 if (!dump_trace) 837 return; 838 839 printf("(IP, %d): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 840 event->header.misc, sample->pid, sample->tid, sample->ip, 841 sample->period, sample->addr); 842 843 sample_type = evsel->attr.sample_type; 844 845 if (sample_type & PERF_SAMPLE_CALLCHAIN) 846 callchain__printf(sample); 847 848 if (sample_type & PERF_SAMPLE_BRANCH_STACK) 849 branch_stack__printf(sample); 850 851 if (sample_type & PERF_SAMPLE_REGS_USER) 852 regs_user__printf(sample, evsel->attr.sample_regs_user); 853 854 if (sample_type & PERF_SAMPLE_STACK_USER) 855 stack_user__printf(&sample->user_stack); 856 857 if (sample_type & PERF_SAMPLE_WEIGHT) 858 printf("... weight: %" PRIu64 "\n", sample->weight); 859 860 if (sample_type & PERF_SAMPLE_DATA_SRC) 861 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src); 862 863 if (sample_type & PERF_SAMPLE_READ) 864 sample_read__printf(sample, evsel->attr.read_format); 865 } 866 867 static struct machine * 868 perf_session__find_machine_for_cpumode(struct perf_session *session, 869 union perf_event *event, 870 struct perf_sample *sample) 871 { 872 const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 873 struct machine *machine; 874 875 if (perf_guest && 876 ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 877 (cpumode == PERF_RECORD_MISC_GUEST_USER))) { 878 u32 pid; 879 880 if (event->header.type == PERF_RECORD_MMAP 881 || event->header.type == PERF_RECORD_MMAP2) 882 pid = event->mmap.pid; 883 else 884 pid = sample->pid; 885 886 machine = perf_session__find_machine(session, pid); 887 if (!machine) 888 machine = perf_session__findnew_machine(session, 889 DEFAULT_GUEST_KERNEL_ID); 890 return machine; 891 } 892 893 return &session->machines.host; 894 } 895 896 static int deliver_sample_value(struct perf_session *session, 897 struct perf_tool *tool, 898 union perf_event *event, 899 struct perf_sample *sample, 900 struct sample_read_value *v, 901 struct machine *machine) 902 { 903 struct perf_sample_id *sid; 904 905 sid = perf_evlist__id2sid(session->evlist, v->id); 906 if (sid) { 907 sample->id = v->id; 908 sample->period = v->value - sid->period; 909 sid->period = v->value; 910 } 911 912 if (!sid || sid->evsel == NULL) { 913 ++session->stats.nr_unknown_id; 914 return 0; 915 } 916 917 return tool->sample(tool, event, sample, sid->evsel, machine); 918 } 919 920 static int deliver_sample_group(struct perf_session *session, 921 struct perf_tool *tool, 922 union perf_event *event, 923 struct perf_sample *sample, 924 struct machine *machine) 925 { 926 int ret = -EINVAL; 927 u64 i; 928 929 for (i = 0; i < sample->read.group.nr; i++) { 930 ret = deliver_sample_value(session, tool, event, sample, 931 &sample->read.group.values[i], 932 machine); 933 if (ret) 934 break; 935 } 936 937 return ret; 938 } 939 940 static int 941 perf_session__deliver_sample(struct perf_session *session, 942 struct perf_tool *tool, 943 union perf_event *event, 944 struct perf_sample *sample, 945 struct perf_evsel *evsel, 946 struct machine *machine) 947 { 948 /* We know evsel != NULL. */ 949 u64 sample_type = evsel->attr.sample_type; 950 u64 read_format = evsel->attr.read_format; 951 952 /* Standard sample delievery. */ 953 if (!(sample_type & PERF_SAMPLE_READ)) 954 return tool->sample(tool, event, sample, evsel, machine); 955 956 /* For PERF_SAMPLE_READ we have either single or group mode. */ 957 if (read_format & PERF_FORMAT_GROUP) 958 return deliver_sample_group(session, tool, event, sample, 959 machine); 960 else 961 return deliver_sample_value(session, tool, event, sample, 962 &sample->read.one, machine); 963 } 964 965 static int perf_session_deliver_event(struct perf_session *session, 966 union perf_event *event, 967 struct perf_sample *sample, 968 struct perf_tool *tool, 969 u64 file_offset) 970 { 971 struct perf_evsel *evsel; 972 struct machine *machine; 973 974 dump_event(session, event, file_offset, sample); 975 976 evsel = perf_evlist__id2evsel(session->evlist, sample->id); 977 if (evsel != NULL && event->header.type != PERF_RECORD_SAMPLE) { 978 /* 979 * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here 980 * because the tools right now may apply filters, discarding 981 * some of the samples. For consistency, in the future we 982 * should have something like nr_filtered_samples and remove 983 * the sample->period from total_sample_period, etc, KISS for 984 * now tho. 985 * 986 * Also testing against NULL allows us to handle files without 987 * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the 988 * future probably it'll be a good idea to restrict event 989 * processing via perf_session to files with both set. 990 */ 991 hists__inc_nr_events(&evsel->hists, event->header.type); 992 } 993 994 machine = perf_session__find_machine_for_cpumode(session, event, 995 sample); 996 997 switch (event->header.type) { 998 case PERF_RECORD_SAMPLE: 999 dump_sample(evsel, event, sample); 1000 if (evsel == NULL) { 1001 ++session->stats.nr_unknown_id; 1002 return 0; 1003 } 1004 if (machine == NULL) { 1005 ++session->stats.nr_unprocessable_samples; 1006 return 0; 1007 } 1008 return perf_session__deliver_sample(session, tool, event, 1009 sample, evsel, machine); 1010 case PERF_RECORD_MMAP: 1011 return tool->mmap(tool, event, sample, machine); 1012 case PERF_RECORD_MMAP2: 1013 return tool->mmap2(tool, event, sample, machine); 1014 case PERF_RECORD_COMM: 1015 return tool->comm(tool, event, sample, machine); 1016 case PERF_RECORD_FORK: 1017 return tool->fork(tool, event, sample, machine); 1018 case PERF_RECORD_EXIT: 1019 return tool->exit(tool, event, sample, machine); 1020 case PERF_RECORD_LOST: 1021 if (tool->lost == perf_event__process_lost) 1022 session->stats.total_lost += event->lost.lost; 1023 return tool->lost(tool, event, sample, machine); 1024 case PERF_RECORD_READ: 1025 return tool->read(tool, event, sample, evsel, machine); 1026 case PERF_RECORD_THROTTLE: 1027 return tool->throttle(tool, event, sample, machine); 1028 case PERF_RECORD_UNTHROTTLE: 1029 return tool->unthrottle(tool, event, sample, machine); 1030 default: 1031 ++session->stats.nr_unknown_events; 1032 return -1; 1033 } 1034 } 1035 1036 static int perf_session__process_user_event(struct perf_session *session, union perf_event *event, 1037 struct perf_tool *tool, u64 file_offset) 1038 { 1039 int err; 1040 1041 dump_event(session, event, file_offset, NULL); 1042 1043 /* These events are processed right away */ 1044 switch (event->header.type) { 1045 case PERF_RECORD_HEADER_ATTR: 1046 err = tool->attr(tool, event, &session->evlist); 1047 if (err == 0) 1048 perf_session__set_id_hdr_size(session); 1049 return err; 1050 case PERF_RECORD_HEADER_TRACING_DATA: 1051 /* setup for reading amidst mmap */ 1052 lseek(session->fd, file_offset, SEEK_SET); 1053 return tool->tracing_data(tool, event, session); 1054 case PERF_RECORD_HEADER_BUILD_ID: 1055 return tool->build_id(tool, event, session); 1056 case PERF_RECORD_FINISHED_ROUND: 1057 return tool->finished_round(tool, event, session); 1058 default: 1059 return -EINVAL; 1060 } 1061 } 1062 1063 static void event_swap(union perf_event *event, bool sample_id_all) 1064 { 1065 perf_event__swap_op swap; 1066 1067 swap = perf_event__swap_ops[event->header.type]; 1068 if (swap) 1069 swap(event, sample_id_all); 1070 } 1071 1072 static int perf_session__process_event(struct perf_session *session, 1073 union perf_event *event, 1074 struct perf_tool *tool, 1075 u64 file_offset) 1076 { 1077 struct perf_sample sample; 1078 int ret; 1079 1080 if (session->header.needs_swap) 1081 event_swap(event, perf_evlist__sample_id_all(session->evlist)); 1082 1083 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1084 return -EINVAL; 1085 1086 events_stats__inc(&session->stats, event->header.type); 1087 1088 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1089 return perf_session__process_user_event(session, event, tool, file_offset); 1090 1091 /* 1092 * For all kernel events we get the sample data 1093 */ 1094 ret = perf_evlist__parse_sample(session->evlist, event, &sample); 1095 if (ret) 1096 return ret; 1097 1098 if (tool->ordered_samples) { 1099 ret = perf_session_queue_event(session, event, &sample, 1100 file_offset); 1101 if (ret != -ETIME) 1102 return ret; 1103 } 1104 1105 return perf_session_deliver_event(session, event, &sample, tool, 1106 file_offset); 1107 } 1108 1109 void perf_event_header__bswap(struct perf_event_header *self) 1110 { 1111 self->type = bswap_32(self->type); 1112 self->misc = bswap_16(self->misc); 1113 self->size = bswap_16(self->size); 1114 } 1115 1116 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1117 { 1118 return machine__findnew_thread(&session->machines.host, 0, pid); 1119 } 1120 1121 static struct thread *perf_session__register_idle_thread(struct perf_session *self) 1122 { 1123 struct thread *thread = perf_session__findnew(self, 0); 1124 1125 if (thread == NULL || thread__set_comm(thread, "swapper")) { 1126 pr_err("problem inserting idle task.\n"); 1127 thread = NULL; 1128 } 1129 1130 return thread; 1131 } 1132 1133 static void perf_session__warn_about_errors(const struct perf_session *session, 1134 const struct perf_tool *tool) 1135 { 1136 if (tool->lost == perf_event__process_lost && 1137 session->stats.nr_events[PERF_RECORD_LOST] != 0) { 1138 ui__warning("Processed %d events and lost %d chunks!\n\n" 1139 "Check IO/CPU overload!\n\n", 1140 session->stats.nr_events[0], 1141 session->stats.nr_events[PERF_RECORD_LOST]); 1142 } 1143 1144 if (session->stats.nr_unknown_events != 0) { 1145 ui__warning("Found %u unknown events!\n\n" 1146 "Is this an older tool processing a perf.data " 1147 "file generated by a more recent tool?\n\n" 1148 "If that is not the case, consider " 1149 "reporting to linux-kernel (at) vger.kernel.org.\n\n", 1150 session->stats.nr_unknown_events); 1151 } 1152 1153 if (session->stats.nr_unknown_id != 0) { 1154 ui__warning("%u samples with id not present in the header\n", 1155 session->stats.nr_unknown_id); 1156 } 1157 1158 if (session->stats.nr_invalid_chains != 0) { 1159 ui__warning("Found invalid callchains!\n\n" 1160 "%u out of %u events were discarded for this reason.\n\n" 1161 "Consider reporting to linux-kernel (at) vger.kernel.org.\n\n", 1162 session->stats.nr_invalid_chains, 1163 session->stats.nr_events[PERF_RECORD_SAMPLE]); 1164 } 1165 1166 if (session->stats.nr_unprocessable_samples != 0) { 1167 ui__warning("%u unprocessable samples recorded.\n" 1168 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1169 session->stats.nr_unprocessable_samples); 1170 } 1171 } 1172 1173 volatile int session_done; 1174 1175 static int __perf_session__process_pipe_events(struct perf_session *self, 1176 struct perf_tool *tool) 1177 { 1178 union perf_event *event; 1179 uint32_t size, cur_size = 0; 1180 void *buf = NULL; 1181 int skip = 0; 1182 u64 head; 1183 int err; 1184 void *p; 1185 1186 perf_tool__fill_defaults(tool); 1187 1188 head = 0; 1189 cur_size = sizeof(union perf_event); 1190 1191 buf = malloc(cur_size); 1192 if (!buf) 1193 return -errno; 1194 more: 1195 event = buf; 1196 err = readn(self->fd, event, sizeof(struct perf_event_header)); 1197 if (err <= 0) { 1198 if (err == 0) 1199 goto done; 1200 1201 pr_err("failed to read event header\n"); 1202 goto out_err; 1203 } 1204 1205 if (self->header.needs_swap) 1206 perf_event_header__bswap(&event->header); 1207 1208 size = event->header.size; 1209 if (size < sizeof(struct perf_event_header)) { 1210 pr_err("bad event header size\n"); 1211 goto out_err; 1212 } 1213 1214 if (size > cur_size) { 1215 void *new = realloc(buf, size); 1216 if (!new) { 1217 pr_err("failed to allocate memory to read event\n"); 1218 goto out_err; 1219 } 1220 buf = new; 1221 cur_size = size; 1222 event = buf; 1223 } 1224 p = event; 1225 p += sizeof(struct perf_event_header); 1226 1227 if (size - sizeof(struct perf_event_header)) { 1228 err = readn(self->fd, p, size - sizeof(struct perf_event_header)); 1229 if (err <= 0) { 1230 if (err == 0) { 1231 pr_err("unexpected end of event stream\n"); 1232 goto done; 1233 } 1234 1235 pr_err("failed to read event data\n"); 1236 goto out_err; 1237 } 1238 } 1239 1240 if ((skip = perf_session__process_event(self, event, tool, head)) < 0) { 1241 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1242 head, event->header.size, event->header.type); 1243 err = -EINVAL; 1244 goto out_err; 1245 } 1246 1247 head += size; 1248 1249 if (skip > 0) 1250 head += skip; 1251 1252 if (!session_done()) 1253 goto more; 1254 done: 1255 err = 0; 1256 out_err: 1257 free(buf); 1258 perf_session__warn_about_errors(self, tool); 1259 perf_session_free_sample_buffers(self); 1260 return err; 1261 } 1262 1263 static union perf_event * 1264 fetch_mmaped_event(struct perf_session *session, 1265 u64 head, size_t mmap_size, char *buf) 1266 { 1267 union perf_event *event; 1268 1269 /* 1270 * Ensure we have enough space remaining to read 1271 * the size of the event in the headers. 1272 */ 1273 if (head + sizeof(event->header) > mmap_size) 1274 return NULL; 1275 1276 event = (union perf_event *)(buf + head); 1277 1278 if (session->header.needs_swap) 1279 perf_event_header__bswap(&event->header); 1280 1281 if (head + event->header.size > mmap_size) { 1282 /* We're not fetching the event so swap back again */ 1283 if (session->header.needs_swap) 1284 perf_event_header__bswap(&event->header); 1285 return NULL; 1286 } 1287 1288 return event; 1289 } 1290 1291 /* 1292 * On 64bit we can mmap the data file in one go. No need for tiny mmap 1293 * slices. On 32bit we use 32MB. 1294 */ 1295 #if BITS_PER_LONG == 64 1296 #define MMAP_SIZE ULLONG_MAX 1297 #define NUM_MMAPS 1 1298 #else 1299 #define MMAP_SIZE (32 * 1024 * 1024ULL) 1300 #define NUM_MMAPS 128 1301 #endif 1302 1303 int __perf_session__process_events(struct perf_session *session, 1304 u64 data_offset, u64 data_size, 1305 u64 file_size, struct perf_tool *tool) 1306 { 1307 u64 head, page_offset, file_offset, file_pos, progress_next; 1308 int err, mmap_prot, mmap_flags, map_idx = 0; 1309 size_t mmap_size; 1310 char *buf, *mmaps[NUM_MMAPS]; 1311 union perf_event *event; 1312 uint32_t size; 1313 1314 perf_tool__fill_defaults(tool); 1315 1316 page_offset = page_size * (data_offset / page_size); 1317 file_offset = page_offset; 1318 head = data_offset - page_offset; 1319 1320 if (data_size && (data_offset + data_size < file_size)) 1321 file_size = data_offset + data_size; 1322 1323 progress_next = file_size / 16; 1324 1325 mmap_size = MMAP_SIZE; 1326 if (mmap_size > file_size) 1327 mmap_size = file_size; 1328 1329 memset(mmaps, 0, sizeof(mmaps)); 1330 1331 mmap_prot = PROT_READ; 1332 mmap_flags = MAP_SHARED; 1333 1334 if (session->header.needs_swap) { 1335 mmap_prot |= PROT_WRITE; 1336 mmap_flags = MAP_PRIVATE; 1337 } 1338 remap: 1339 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, session->fd, 1340 file_offset); 1341 if (buf == MAP_FAILED) { 1342 pr_err("failed to mmap file\n"); 1343 err = -errno; 1344 goto out_err; 1345 } 1346 mmaps[map_idx] = buf; 1347 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 1348 file_pos = file_offset + head; 1349 1350 more: 1351 event = fetch_mmaped_event(session, head, mmap_size, buf); 1352 if (!event) { 1353 if (mmaps[map_idx]) { 1354 munmap(mmaps[map_idx], mmap_size); 1355 mmaps[map_idx] = NULL; 1356 } 1357 1358 page_offset = page_size * (head / page_size); 1359 file_offset += page_offset; 1360 head -= page_offset; 1361 goto remap; 1362 } 1363 1364 size = event->header.size; 1365 1366 if (size < sizeof(struct perf_event_header) || 1367 perf_session__process_event(session, event, tool, file_pos) < 0) { 1368 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1369 file_offset + head, event->header.size, 1370 event->header.type); 1371 err = -EINVAL; 1372 goto out_err; 1373 } 1374 1375 head += size; 1376 file_pos += size; 1377 1378 if (file_pos >= progress_next) { 1379 progress_next += file_size / 16; 1380 ui_progress__update(file_pos, file_size, 1381 "Processing events..."); 1382 } 1383 1384 err = 0; 1385 if (session_done()) 1386 goto out_err; 1387 1388 if (file_pos < file_size) 1389 goto more; 1390 1391 /* do the final flush for ordered samples */ 1392 session->ordered_samples.next_flush = ULLONG_MAX; 1393 err = flush_sample_queue(session, tool); 1394 out_err: 1395 ui_progress__finish(); 1396 perf_session__warn_about_errors(session, tool); 1397 perf_session_free_sample_buffers(session); 1398 return err; 1399 } 1400 1401 int perf_session__process_events(struct perf_session *self, 1402 struct perf_tool *tool) 1403 { 1404 int err; 1405 1406 if (perf_session__register_idle_thread(self) == NULL) 1407 return -ENOMEM; 1408 1409 if (!self->fd_pipe) 1410 err = __perf_session__process_events(self, 1411 self->header.data_offset, 1412 self->header.data_size, 1413 self->size, tool); 1414 else 1415 err = __perf_session__process_pipe_events(self, tool); 1416 1417 return err; 1418 } 1419 1420 bool perf_session__has_traces(struct perf_session *session, const char *msg) 1421 { 1422 struct perf_evsel *evsel; 1423 1424 list_for_each_entry(evsel, &session->evlist->entries, node) { 1425 if (evsel->attr.type == PERF_TYPE_TRACEPOINT) 1426 return true; 1427 } 1428 1429 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 1430 return false; 1431 } 1432 1433 int maps__set_kallsyms_ref_reloc_sym(struct map **maps, 1434 const char *symbol_name, u64 addr) 1435 { 1436 char *bracket; 1437 enum map_type i; 1438 struct ref_reloc_sym *ref; 1439 1440 ref = zalloc(sizeof(struct ref_reloc_sym)); 1441 if (ref == NULL) 1442 return -ENOMEM; 1443 1444 ref->name = strdup(symbol_name); 1445 if (ref->name == NULL) { 1446 free(ref); 1447 return -ENOMEM; 1448 } 1449 1450 bracket = strchr(ref->name, ']'); 1451 if (bracket) 1452 *bracket = '\0'; 1453 1454 ref->addr = addr; 1455 1456 for (i = 0; i < MAP__NR_TYPES; ++i) { 1457 struct kmap *kmap = map__kmap(maps[i]); 1458 kmap->ref_reloc_sym = ref; 1459 } 1460 1461 return 0; 1462 } 1463 1464 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp) 1465 { 1466 return machines__fprintf_dsos(&self->machines, fp); 1467 } 1468 1469 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp, 1470 bool (skip)(struct dso *dso, int parm), int parm) 1471 { 1472 return machines__fprintf_dsos_buildid(&self->machines, fp, skip, parm); 1473 } 1474 1475 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 1476 { 1477 struct perf_evsel *pos; 1478 size_t ret = fprintf(fp, "Aggregated stats:\n"); 1479 1480 ret += events_stats__fprintf(&session->stats, fp); 1481 1482 list_for_each_entry(pos, &session->evlist->entries, node) { 1483 ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos)); 1484 ret += events_stats__fprintf(&pos->hists.stats, fp); 1485 } 1486 1487 return ret; 1488 } 1489 1490 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 1491 { 1492 /* 1493 * FIXME: Here we have to actually print all the machines in this 1494 * session, not just the host... 1495 */ 1496 return machine__fprintf(&session->machines.host, fp); 1497 } 1498 1499 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, 1500 unsigned int type) 1501 { 1502 struct perf_evsel *pos; 1503 1504 list_for_each_entry(pos, &session->evlist->entries, node) { 1505 if (pos->attr.type == type) 1506 return pos; 1507 } 1508 return NULL; 1509 } 1510 1511 void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event, 1512 struct perf_sample *sample, struct machine *machine, 1513 unsigned int print_opts, unsigned int stack_depth) 1514 { 1515 struct addr_location al; 1516 struct callchain_cursor_node *node; 1517 int print_ip = print_opts & PRINT_IP_OPT_IP; 1518 int print_sym = print_opts & PRINT_IP_OPT_SYM; 1519 int print_dso = print_opts & PRINT_IP_OPT_DSO; 1520 int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET; 1521 int print_oneline = print_opts & PRINT_IP_OPT_ONELINE; 1522 char s = print_oneline ? ' ' : '\t'; 1523 1524 if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) { 1525 error("problem processing %d event, skipping it.\n", 1526 event->header.type); 1527 return; 1528 } 1529 1530 if (symbol_conf.use_callchain && sample->callchain) { 1531 1532 if (machine__resolve_callchain(machine, evsel, al.thread, 1533 sample, NULL, NULL) != 0) { 1534 if (verbose) 1535 error("Failed to resolve callchain. Skipping\n"); 1536 return; 1537 } 1538 callchain_cursor_commit(&callchain_cursor); 1539 1540 while (stack_depth) { 1541 node = callchain_cursor_current(&callchain_cursor); 1542 if (!node) 1543 break; 1544 1545 if (print_ip) 1546 printf("%c%16" PRIx64, s, node->ip); 1547 1548 if (print_sym) { 1549 printf(" "); 1550 if (print_symoffset) { 1551 al.addr = node->ip; 1552 al.map = node->map; 1553 symbol__fprintf_symname_offs(node->sym, &al, stdout); 1554 } else 1555 symbol__fprintf_symname(node->sym, stdout); 1556 } 1557 1558 if (print_dso) { 1559 printf(" ("); 1560 map__fprintf_dsoname(node->map, stdout); 1561 printf(")"); 1562 } 1563 1564 if (!print_oneline) 1565 printf("\n"); 1566 1567 callchain_cursor_advance(&callchain_cursor); 1568 1569 stack_depth--; 1570 } 1571 1572 } else { 1573 if (print_ip) 1574 printf("%16" PRIx64, sample->ip); 1575 1576 if (print_sym) { 1577 printf(" "); 1578 if (print_symoffset) 1579 symbol__fprintf_symname_offs(al.sym, &al, 1580 stdout); 1581 else 1582 symbol__fprintf_symname(al.sym, stdout); 1583 } 1584 1585 if (print_dso) { 1586 printf(" ("); 1587 map__fprintf_dsoname(al.map, stdout); 1588 printf(")"); 1589 } 1590 } 1591 } 1592 1593 int perf_session__cpu_bitmap(struct perf_session *session, 1594 const char *cpu_list, unsigned long *cpu_bitmap) 1595 { 1596 int i; 1597 struct cpu_map *map; 1598 1599 for (i = 0; i < PERF_TYPE_MAX; ++i) { 1600 struct perf_evsel *evsel; 1601 1602 evsel = perf_session__find_first_evtype(session, i); 1603 if (!evsel) 1604 continue; 1605 1606 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) { 1607 pr_err("File does not contain CPU events. " 1608 "Remove -c option to proceed.\n"); 1609 return -1; 1610 } 1611 } 1612 1613 map = cpu_map__new(cpu_list); 1614 if (map == NULL) { 1615 pr_err("Invalid cpu_list\n"); 1616 return -1; 1617 } 1618 1619 for (i = 0; i < map->nr; i++) { 1620 int cpu = map->map[i]; 1621 1622 if (cpu >= MAX_NR_CPUS) { 1623 pr_err("Requested CPU %d too large. " 1624 "Consider raising MAX_NR_CPUS\n", cpu); 1625 return -1; 1626 } 1627 1628 set_bit(cpu, cpu_bitmap); 1629 } 1630 1631 return 0; 1632 } 1633 1634 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 1635 bool full) 1636 { 1637 struct stat st; 1638 int ret; 1639 1640 if (session == NULL || fp == NULL) 1641 return; 1642 1643 ret = fstat(session->fd, &st); 1644 if (ret == -1) 1645 return; 1646 1647 fprintf(fp, "# ========\n"); 1648 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime)); 1649 perf_header__fprintf_info(session, fp, full); 1650 fprintf(fp, "# ========\n#\n"); 1651 } 1652 1653 1654 int __perf_session__set_tracepoints_handlers(struct perf_session *session, 1655 const struct perf_evsel_str_handler *assocs, 1656 size_t nr_assocs) 1657 { 1658 struct perf_evsel *evsel; 1659 size_t i; 1660 int err; 1661 1662 for (i = 0; i < nr_assocs; i++) { 1663 /* 1664 * Adding a handler for an event not in the session, 1665 * just ignore it. 1666 */ 1667 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name); 1668 if (evsel == NULL) 1669 continue; 1670 1671 err = -EEXIST; 1672 if (evsel->handler.func != NULL) 1673 goto out; 1674 evsel->handler.func = assocs[i].handler; 1675 } 1676 1677 err = 0; 1678 out: 1679 return err; 1680 } 1681
