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; 873 874 if (perf_guest && 875 ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 876 (cpumode == PERF_RECORD_MISC_GUEST_USER))) { 877 u32 pid; 878 879 if (event->header.type == PERF_RECORD_MMAP 880 || event->header.type == PERF_RECORD_MMAP2) 881 pid = event->mmap.pid; 882 else 883 pid = sample->pid; 884 885 return perf_session__findnew_machine(session, pid); 886 } 887 888 return &session->machines.host; 889 } 890 891 static int deliver_sample_value(struct perf_session *session, 892 struct perf_tool *tool, 893 union perf_event *event, 894 struct perf_sample *sample, 895 struct sample_read_value *v, 896 struct machine *machine) 897 { 898 struct perf_sample_id *sid; 899 900 sid = perf_evlist__id2sid(session->evlist, v->id); 901 if (sid) { 902 sample->id = v->id; 903 sample->period = v->value - sid->period; 904 sid->period = v->value; 905 } 906 907 if (!sid || sid->evsel == NULL) { 908 ++session->stats.nr_unknown_id; 909 return 0; 910 } 911 912 return tool->sample(tool, event, sample, sid->evsel, machine); 913 } 914 915 static int deliver_sample_group(struct perf_session *session, 916 struct perf_tool *tool, 917 union perf_event *event, 918 struct perf_sample *sample, 919 struct machine *machine) 920 { 921 int ret = -EINVAL; 922 u64 i; 923 924 for (i = 0; i < sample->read.group.nr; i++) { 925 ret = deliver_sample_value(session, tool, event, sample, 926 &sample->read.group.values[i], 927 machine); 928 if (ret) 929 break; 930 } 931 932 return ret; 933 } 934 935 static int 936 perf_session__deliver_sample(struct perf_session *session, 937 struct perf_tool *tool, 938 union perf_event *event, 939 struct perf_sample *sample, 940 struct perf_evsel *evsel, 941 struct machine *machine) 942 { 943 /* We know evsel != NULL. */ 944 u64 sample_type = evsel->attr.sample_type; 945 u64 read_format = evsel->attr.read_format; 946 947 /* Standard sample delievery. */ 948 if (!(sample_type & PERF_SAMPLE_READ)) 949 return tool->sample(tool, event, sample, evsel, machine); 950 951 /* For PERF_SAMPLE_READ we have either single or group mode. */ 952 if (read_format & PERF_FORMAT_GROUP) 953 return deliver_sample_group(session, tool, event, sample, 954 machine); 955 else 956 return deliver_sample_value(session, tool, event, sample, 957 &sample->read.one, machine); 958 } 959 960 static int perf_session_deliver_event(struct perf_session *session, 961 union perf_event *event, 962 struct perf_sample *sample, 963 struct perf_tool *tool, 964 u64 file_offset) 965 { 966 struct perf_evsel *evsel; 967 struct machine *machine; 968 969 dump_event(session, event, file_offset, sample); 970 971 evsel = perf_evlist__id2evsel(session->evlist, sample->id); 972 if (evsel != NULL && event->header.type != PERF_RECORD_SAMPLE) { 973 /* 974 * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here 975 * because the tools right now may apply filters, discarding 976 * some of the samples. For consistency, in the future we 977 * should have something like nr_filtered_samples and remove 978 * the sample->period from total_sample_period, etc, KISS for 979 * now tho. 980 * 981 * Also testing against NULL allows us to handle files without 982 * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the 983 * future probably it'll be a good idea to restrict event 984 * processing via perf_session to files with both set. 985 */ 986 hists__inc_nr_events(&evsel->hists, event->header.type); 987 } 988 989 machine = perf_session__find_machine_for_cpumode(session, event, 990 sample); 991 992 switch (event->header.type) { 993 case PERF_RECORD_SAMPLE: 994 dump_sample(evsel, event, sample); 995 if (evsel == NULL) { 996 ++session->stats.nr_unknown_id; 997 return 0; 998 } 999 if (machine == NULL) { 1000 ++session->stats.nr_unprocessable_samples; 1001 return 0; 1002 } 1003 return perf_session__deliver_sample(session, tool, event, 1004 sample, evsel, machine); 1005 case PERF_RECORD_MMAP: 1006 return tool->mmap(tool, event, sample, machine); 1007 case PERF_RECORD_MMAP2: 1008 return tool->mmap2(tool, event, sample, machine); 1009 case PERF_RECORD_COMM: 1010 return tool->comm(tool, event, sample, machine); 1011 case PERF_RECORD_FORK: 1012 return tool->fork(tool, event, sample, machine); 1013 case PERF_RECORD_EXIT: 1014 return tool->exit(tool, event, sample, machine); 1015 case PERF_RECORD_LOST: 1016 if (tool->lost == perf_event__process_lost) 1017 session->stats.total_lost += event->lost.lost; 1018 return tool->lost(tool, event, sample, machine); 1019 case PERF_RECORD_READ: 1020 return tool->read(tool, event, sample, evsel, machine); 1021 case PERF_RECORD_THROTTLE: 1022 return tool->throttle(tool, event, sample, machine); 1023 case PERF_RECORD_UNTHROTTLE: 1024 return tool->unthrottle(tool, event, sample, machine); 1025 default: 1026 ++session->stats.nr_unknown_events; 1027 return -1; 1028 } 1029 } 1030 1031 static int perf_session__process_user_event(struct perf_session *session, union perf_event *event, 1032 struct perf_tool *tool, u64 file_offset) 1033 { 1034 int err; 1035 1036 dump_event(session, event, file_offset, NULL); 1037 1038 /* These events are processed right away */ 1039 switch (event->header.type) { 1040 case PERF_RECORD_HEADER_ATTR: 1041 err = tool->attr(tool, event, &session->evlist); 1042 if (err == 0) 1043 perf_session__set_id_hdr_size(session); 1044 return err; 1045 case PERF_RECORD_HEADER_TRACING_DATA: 1046 /* setup for reading amidst mmap */ 1047 lseek(session->fd, file_offset, SEEK_SET); 1048 return tool->tracing_data(tool, event, session); 1049 case PERF_RECORD_HEADER_BUILD_ID: 1050 return tool->build_id(tool, event, session); 1051 case PERF_RECORD_FINISHED_ROUND: 1052 return tool->finished_round(tool, event, session); 1053 default: 1054 return -EINVAL; 1055 } 1056 } 1057 1058 static void event_swap(union perf_event *event, bool sample_id_all) 1059 { 1060 perf_event__swap_op swap; 1061 1062 swap = perf_event__swap_ops[event->header.type]; 1063 if (swap) 1064 swap(event, sample_id_all); 1065 } 1066 1067 static int perf_session__process_event(struct perf_session *session, 1068 union perf_event *event, 1069 struct perf_tool *tool, 1070 u64 file_offset) 1071 { 1072 struct perf_sample sample; 1073 int ret; 1074 1075 if (session->header.needs_swap) 1076 event_swap(event, perf_evlist__sample_id_all(session->evlist)); 1077 1078 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1079 return -EINVAL; 1080 1081 events_stats__inc(&session->stats, event->header.type); 1082 1083 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1084 return perf_session__process_user_event(session, event, tool, file_offset); 1085 1086 /* 1087 * For all kernel events we get the sample data 1088 */ 1089 ret = perf_evlist__parse_sample(session->evlist, event, &sample); 1090 if (ret) 1091 return ret; 1092 1093 if (tool->ordered_samples) { 1094 ret = perf_session_queue_event(session, event, &sample, 1095 file_offset); 1096 if (ret != -ETIME) 1097 return ret; 1098 } 1099 1100 return perf_session_deliver_event(session, event, &sample, tool, 1101 file_offset); 1102 } 1103 1104 void perf_event_header__bswap(struct perf_event_header *self) 1105 { 1106 self->type = bswap_32(self->type); 1107 self->misc = bswap_16(self->misc); 1108 self->size = bswap_16(self->size); 1109 } 1110 1111 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1112 { 1113 return machine__findnew_thread(&session->machines.host, 0, pid); 1114 } 1115 1116 static struct thread *perf_session__register_idle_thread(struct perf_session *self) 1117 { 1118 struct thread *thread = perf_session__findnew(self, 0); 1119 1120 if (thread == NULL || thread__set_comm(thread, "swapper")) { 1121 pr_err("problem inserting idle task.\n"); 1122 thread = NULL; 1123 } 1124 1125 return thread; 1126 } 1127 1128 static void perf_session__warn_about_errors(const struct perf_session *session, 1129 const struct perf_tool *tool) 1130 { 1131 if (tool->lost == perf_event__process_lost && 1132 session->stats.nr_events[PERF_RECORD_LOST] != 0) { 1133 ui__warning("Processed %d events and lost %d chunks!\n\n" 1134 "Check IO/CPU overload!\n\n", 1135 session->stats.nr_events[0], 1136 session->stats.nr_events[PERF_RECORD_LOST]); 1137 } 1138 1139 if (session->stats.nr_unknown_events != 0) { 1140 ui__warning("Found %u unknown events!\n\n" 1141 "Is this an older tool processing a perf.data " 1142 "file generated by a more recent tool?\n\n" 1143 "If that is not the case, consider " 1144 "reporting to linux-kernel (at) vger.kernel.org.\n\n", 1145 session->stats.nr_unknown_events); 1146 } 1147 1148 if (session->stats.nr_unknown_id != 0) { 1149 ui__warning("%u samples with id not present in the header\n", 1150 session->stats.nr_unknown_id); 1151 } 1152 1153 if (session->stats.nr_invalid_chains != 0) { 1154 ui__warning("Found invalid callchains!\n\n" 1155 "%u out of %u events were discarded for this reason.\n\n" 1156 "Consider reporting to linux-kernel (at) vger.kernel.org.\n\n", 1157 session->stats.nr_invalid_chains, 1158 session->stats.nr_events[PERF_RECORD_SAMPLE]); 1159 } 1160 1161 if (session->stats.nr_unprocessable_samples != 0) { 1162 ui__warning("%u unprocessable samples recorded.\n" 1163 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1164 session->stats.nr_unprocessable_samples); 1165 } 1166 } 1167 1168 volatile int session_done; 1169 1170 static int __perf_session__process_pipe_events(struct perf_session *self, 1171 struct perf_tool *tool) 1172 { 1173 union perf_event *event; 1174 uint32_t size, cur_size = 0; 1175 void *buf = NULL; 1176 int skip = 0; 1177 u64 head; 1178 int err; 1179 void *p; 1180 1181 perf_tool__fill_defaults(tool); 1182 1183 head = 0; 1184 cur_size = sizeof(union perf_event); 1185 1186 buf = malloc(cur_size); 1187 if (!buf) 1188 return -errno; 1189 more: 1190 event = buf; 1191 err = readn(self->fd, event, sizeof(struct perf_event_header)); 1192 if (err <= 0) { 1193 if (err == 0) 1194 goto done; 1195 1196 pr_err("failed to read event header\n"); 1197 goto out_err; 1198 } 1199 1200 if (self->header.needs_swap) 1201 perf_event_header__bswap(&event->header); 1202 1203 size = event->header.size; 1204 if (size < sizeof(struct perf_event_header)) { 1205 pr_err("bad event header size\n"); 1206 goto out_err; 1207 } 1208 1209 if (size > cur_size) { 1210 void *new = realloc(buf, size); 1211 if (!new) { 1212 pr_err("failed to allocate memory to read event\n"); 1213 goto out_err; 1214 } 1215 buf = new; 1216 cur_size = size; 1217 event = buf; 1218 } 1219 p = event; 1220 p += sizeof(struct perf_event_header); 1221 1222 if (size - sizeof(struct perf_event_header)) { 1223 err = readn(self->fd, p, size - sizeof(struct perf_event_header)); 1224 if (err <= 0) { 1225 if (err == 0) { 1226 pr_err("unexpected end of event stream\n"); 1227 goto done; 1228 } 1229 1230 pr_err("failed to read event data\n"); 1231 goto out_err; 1232 } 1233 } 1234 1235 if ((skip = perf_session__process_event(self, event, tool, head)) < 0) { 1236 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1237 head, event->header.size, event->header.type); 1238 err = -EINVAL; 1239 goto out_err; 1240 } 1241 1242 head += size; 1243 1244 if (skip > 0) 1245 head += skip; 1246 1247 if (!session_done()) 1248 goto more; 1249 done: 1250 err = 0; 1251 out_err: 1252 free(buf); 1253 perf_session__warn_about_errors(self, tool); 1254 perf_session_free_sample_buffers(self); 1255 return err; 1256 } 1257 1258 static union perf_event * 1259 fetch_mmaped_event(struct perf_session *session, 1260 u64 head, size_t mmap_size, char *buf) 1261 { 1262 union perf_event *event; 1263 1264 /* 1265 * Ensure we have enough space remaining to read 1266 * the size of the event in the headers. 1267 */ 1268 if (head + sizeof(event->header) > mmap_size) 1269 return NULL; 1270 1271 event = (union perf_event *)(buf + head); 1272 1273 if (session->header.needs_swap) 1274 perf_event_header__bswap(&event->header); 1275 1276 if (head + event->header.size > mmap_size) { 1277 /* We're not fetching the event so swap back again */ 1278 if (session->header.needs_swap) 1279 perf_event_header__bswap(&event->header); 1280 return NULL; 1281 } 1282 1283 return event; 1284 } 1285 1286 /* 1287 * On 64bit we can mmap the data file in one go. No need for tiny mmap 1288 * slices. On 32bit we use 32MB. 1289 */ 1290 #if BITS_PER_LONG == 64 1291 #define MMAP_SIZE ULLONG_MAX 1292 #define NUM_MMAPS 1 1293 #else 1294 #define MMAP_SIZE (32 * 1024 * 1024ULL) 1295 #define NUM_MMAPS 128 1296 #endif 1297 1298 int __perf_session__process_events(struct perf_session *session, 1299 u64 data_offset, u64 data_size, 1300 u64 file_size, struct perf_tool *tool) 1301 { 1302 u64 head, page_offset, file_offset, file_pos, progress_next; 1303 int err, mmap_prot, mmap_flags, map_idx = 0; 1304 size_t mmap_size; 1305 char *buf, *mmaps[NUM_MMAPS]; 1306 union perf_event *event; 1307 uint32_t size; 1308 1309 perf_tool__fill_defaults(tool); 1310 1311 page_offset = page_size * (data_offset / page_size); 1312 file_offset = page_offset; 1313 head = data_offset - page_offset; 1314 1315 if (data_size && (data_offset + data_size < file_size)) 1316 file_size = data_offset + data_size; 1317 1318 progress_next = file_size / 16; 1319 1320 mmap_size = MMAP_SIZE; 1321 if (mmap_size > file_size) 1322 mmap_size = file_size; 1323 1324 memset(mmaps, 0, sizeof(mmaps)); 1325 1326 mmap_prot = PROT_READ; 1327 mmap_flags = MAP_SHARED; 1328 1329 if (session->header.needs_swap) { 1330 mmap_prot |= PROT_WRITE; 1331 mmap_flags = MAP_PRIVATE; 1332 } 1333 remap: 1334 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, session->fd, 1335 file_offset); 1336 if (buf == MAP_FAILED) { 1337 pr_err("failed to mmap file\n"); 1338 err = -errno; 1339 goto out_err; 1340 } 1341 mmaps[map_idx] = buf; 1342 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 1343 file_pos = file_offset + head; 1344 1345 more: 1346 event = fetch_mmaped_event(session, head, mmap_size, buf); 1347 if (!event) { 1348 if (mmaps[map_idx]) { 1349 munmap(mmaps[map_idx], mmap_size); 1350 mmaps[map_idx] = NULL; 1351 } 1352 1353 page_offset = page_size * (head / page_size); 1354 file_offset += page_offset; 1355 head -= page_offset; 1356 goto remap; 1357 } 1358 1359 size = event->header.size; 1360 1361 if (size < sizeof(struct perf_event_header) || 1362 perf_session__process_event(session, event, tool, file_pos) < 0) { 1363 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1364 file_offset + head, event->header.size, 1365 event->header.type); 1366 err = -EINVAL; 1367 goto out_err; 1368 } 1369 1370 head += size; 1371 file_pos += size; 1372 1373 if (file_pos >= progress_next) { 1374 progress_next += file_size / 16; 1375 ui_progress__update(file_pos, file_size, 1376 "Processing events..."); 1377 } 1378 1379 err = 0; 1380 if (session_done()) 1381 goto out_err; 1382 1383 if (file_pos < file_size) 1384 goto more; 1385 1386 /* do the final flush for ordered samples */ 1387 session->ordered_samples.next_flush = ULLONG_MAX; 1388 err = flush_sample_queue(session, tool); 1389 out_err: 1390 ui_progress__finish(); 1391 perf_session__warn_about_errors(session, tool); 1392 perf_session_free_sample_buffers(session); 1393 return err; 1394 } 1395 1396 int perf_session__process_events(struct perf_session *self, 1397 struct perf_tool *tool) 1398 { 1399 int err; 1400 1401 if (perf_session__register_idle_thread(self) == NULL) 1402 return -ENOMEM; 1403 1404 if (!self->fd_pipe) 1405 err = __perf_session__process_events(self, 1406 self->header.data_offset, 1407 self->header.data_size, 1408 self->size, tool); 1409 else 1410 err = __perf_session__process_pipe_events(self, tool); 1411 1412 return err; 1413 } 1414 1415 bool perf_session__has_traces(struct perf_session *session, const char *msg) 1416 { 1417 struct perf_evsel *evsel; 1418 1419 list_for_each_entry(evsel, &session->evlist->entries, node) { 1420 if (evsel->attr.type == PERF_TYPE_TRACEPOINT) 1421 return true; 1422 } 1423 1424 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 1425 return false; 1426 } 1427 1428 int maps__set_kallsyms_ref_reloc_sym(struct map **maps, 1429 const char *symbol_name, u64 addr) 1430 { 1431 char *bracket; 1432 enum map_type i; 1433 struct ref_reloc_sym *ref; 1434 1435 ref = zalloc(sizeof(struct ref_reloc_sym)); 1436 if (ref == NULL) 1437 return -ENOMEM; 1438 1439 ref->name = strdup(symbol_name); 1440 if (ref->name == NULL) { 1441 free(ref); 1442 return -ENOMEM; 1443 } 1444 1445 bracket = strchr(ref->name, ']'); 1446 if (bracket) 1447 *bracket = '\0'; 1448 1449 ref->addr = addr; 1450 1451 for (i = 0; i < MAP__NR_TYPES; ++i) { 1452 struct kmap *kmap = map__kmap(maps[i]); 1453 kmap->ref_reloc_sym = ref; 1454 } 1455 1456 return 0; 1457 } 1458 1459 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp) 1460 { 1461 return machines__fprintf_dsos(&self->machines, fp); 1462 } 1463 1464 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp, 1465 bool (skip)(struct dso *dso, int parm), int parm) 1466 { 1467 return machines__fprintf_dsos_buildid(&self->machines, fp, skip, parm); 1468 } 1469 1470 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 1471 { 1472 struct perf_evsel *pos; 1473 size_t ret = fprintf(fp, "Aggregated stats:\n"); 1474 1475 ret += events_stats__fprintf(&session->stats, fp); 1476 1477 list_for_each_entry(pos, &session->evlist->entries, node) { 1478 ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos)); 1479 ret += events_stats__fprintf(&pos->hists.stats, fp); 1480 } 1481 1482 return ret; 1483 } 1484 1485 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 1486 { 1487 /* 1488 * FIXME: Here we have to actually print all the machines in this 1489 * session, not just the host... 1490 */ 1491 return machine__fprintf(&session->machines.host, fp); 1492 } 1493 1494 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, 1495 unsigned int type) 1496 { 1497 struct perf_evsel *pos; 1498 1499 list_for_each_entry(pos, &session->evlist->entries, node) { 1500 if (pos->attr.type == type) 1501 return pos; 1502 } 1503 return NULL; 1504 } 1505 1506 void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event, 1507 struct perf_sample *sample, struct machine *machine, 1508 unsigned int print_opts, unsigned int stack_depth) 1509 { 1510 struct addr_location al; 1511 struct callchain_cursor_node *node; 1512 int print_ip = print_opts & PRINT_IP_OPT_IP; 1513 int print_sym = print_opts & PRINT_IP_OPT_SYM; 1514 int print_dso = print_opts & PRINT_IP_OPT_DSO; 1515 int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET; 1516 int print_oneline = print_opts & PRINT_IP_OPT_ONELINE; 1517 char s = print_oneline ? ' ' : '\t'; 1518 1519 if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) { 1520 error("problem processing %d event, skipping it.\n", 1521 event->header.type); 1522 return; 1523 } 1524 1525 if (symbol_conf.use_callchain && sample->callchain) { 1526 1527 if (machine__resolve_callchain(machine, evsel, al.thread, 1528 sample, NULL, NULL) != 0) { 1529 if (verbose) 1530 error("Failed to resolve callchain. Skipping\n"); 1531 return; 1532 } 1533 callchain_cursor_commit(&callchain_cursor); 1534 1535 while (stack_depth) { 1536 node = callchain_cursor_current(&callchain_cursor); 1537 if (!node) 1538 break; 1539 1540 if (print_ip) 1541 printf("%c%16" PRIx64, s, node->ip); 1542 1543 if (print_sym) { 1544 printf(" "); 1545 if (print_symoffset) { 1546 al.addr = node->ip; 1547 al.map = node->map; 1548 symbol__fprintf_symname_offs(node->sym, &al, stdout); 1549 } else 1550 symbol__fprintf_symname(node->sym, stdout); 1551 } 1552 1553 if (print_dso) { 1554 printf(" ("); 1555 map__fprintf_dsoname(node->map, stdout); 1556 printf(")"); 1557 } 1558 1559 if (!print_oneline) 1560 printf("\n"); 1561 1562 callchain_cursor_advance(&callchain_cursor); 1563 1564 stack_depth--; 1565 } 1566 1567 } else { 1568 if (print_ip) 1569 printf("%16" PRIx64, sample->ip); 1570 1571 if (print_sym) { 1572 printf(" "); 1573 if (print_symoffset) 1574 symbol__fprintf_symname_offs(al.sym, &al, 1575 stdout); 1576 else 1577 symbol__fprintf_symname(al.sym, stdout); 1578 } 1579 1580 if (print_dso) { 1581 printf(" ("); 1582 map__fprintf_dsoname(al.map, stdout); 1583 printf(")"); 1584 } 1585 } 1586 } 1587 1588 int perf_session__cpu_bitmap(struct perf_session *session, 1589 const char *cpu_list, unsigned long *cpu_bitmap) 1590 { 1591 int i; 1592 struct cpu_map *map; 1593 1594 for (i = 0; i < PERF_TYPE_MAX; ++i) { 1595 struct perf_evsel *evsel; 1596 1597 evsel = perf_session__find_first_evtype(session, i); 1598 if (!evsel) 1599 continue; 1600 1601 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) { 1602 pr_err("File does not contain CPU events. " 1603 "Remove -c option to proceed.\n"); 1604 return -1; 1605 } 1606 } 1607 1608 map = cpu_map__new(cpu_list); 1609 if (map == NULL) { 1610 pr_err("Invalid cpu_list\n"); 1611 return -1; 1612 } 1613 1614 for (i = 0; i < map->nr; i++) { 1615 int cpu = map->map[i]; 1616 1617 if (cpu >= MAX_NR_CPUS) { 1618 pr_err("Requested CPU %d too large. " 1619 "Consider raising MAX_NR_CPUS\n", cpu); 1620 return -1; 1621 } 1622 1623 set_bit(cpu, cpu_bitmap); 1624 } 1625 1626 return 0; 1627 } 1628 1629 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 1630 bool full) 1631 { 1632 struct stat st; 1633 int ret; 1634 1635 if (session == NULL || fp == NULL) 1636 return; 1637 1638 ret = fstat(session->fd, &st); 1639 if (ret == -1) 1640 return; 1641 1642 fprintf(fp, "# ========\n"); 1643 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime)); 1644 perf_header__fprintf_info(session, fp, full); 1645 fprintf(fp, "# ========\n#\n"); 1646 } 1647 1648 1649 int __perf_session__set_tracepoints_handlers(struct perf_session *session, 1650 const struct perf_evsel_str_handler *assocs, 1651 size_t nr_assocs) 1652 { 1653 struct perf_evsel *evsel; 1654 size_t i; 1655 int err; 1656 1657 for (i = 0; i < nr_assocs; i++) { 1658 /* 1659 * Adding a handler for an event not in the session, 1660 * just ignore it. 1661 */ 1662 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name); 1663 if (evsel == NULL) 1664 continue; 1665 1666 err = -EEXIST; 1667 if (evsel->handler.func != NULL) 1668 goto out; 1669 evsel->handler.func = assocs[i].handler; 1670 } 1671 1672 err = 0; 1673 out: 1674 return err; 1675 } 1676
