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) 20 { 21 if (self->fd_pipe) { 22 if (perf_session__read_header(self) < 0) 23 pr_err("incompatible file format (rerun with -v to learn more)"); 24 return 0; 25 } 26 27 if (perf_session__read_header(self) < 0) { 28 pr_err("incompatible file format (rerun with -v to learn more)"); 29 return -1; 30 } 31 32 if (!perf_evlist__valid_sample_type(self->evlist)) { 33 pr_err("non matching sample_type"); 34 return -1; 35 } 36 37 if (!perf_evlist__valid_sample_id_all(self->evlist)) { 38 pr_err("non matching sample_id_all"); 39 return -1; 40 } 41 42 if (!perf_evlist__valid_read_format(self->evlist)) { 43 pr_err("non matching read_format"); 44 return -1; 45 } 46 47 return 0; 48 } 49 50 void perf_session__set_id_hdr_size(struct perf_session *session) 51 { 52 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist); 53 54 machines__set_id_hdr_size(&session->machines, id_hdr_size); 55 } 56 57 int perf_session__create_kernel_maps(struct perf_session *self) 58 { 59 int ret = machine__create_kernel_maps(&self->machines.host); 60 61 if (ret >= 0) 62 ret = machines__create_guest_kernel_maps(&self->machines); 63 return ret; 64 } 65 66 static void perf_session__destroy_kernel_maps(struct perf_session *self) 67 { 68 machines__destroy_kernel_maps(&self->machines); 69 } 70 71 struct perf_session *perf_session__new(struct perf_data_file *file, 72 bool repipe, struct perf_tool *tool) 73 { 74 struct perf_session *self; 75 76 self = zalloc(sizeof(*self)); 77 if (!self) 78 goto out; 79 80 self->repipe = repipe; 81 INIT_LIST_HEAD(&self->ordered_samples.samples); 82 INIT_LIST_HEAD(&self->ordered_samples.sample_cache); 83 INIT_LIST_HEAD(&self->ordered_samples.to_free); 84 machines__init(&self->machines); 85 86 if (file) { 87 if (perf_data_file__open(file)) 88 goto out_delete; 89 90 self->fd = file->fd; 91 self->fd_pipe = file->is_pipe; 92 self->filename = file->path; 93 self->size = file->size; 94 95 if (perf_data_file__is_read(file)) { 96 if (perf_session__open(self) < 0) 97 goto out_close; 98 99 perf_session__set_id_hdr_size(self); 100 } 101 } 102 103 if (!file || perf_data_file__is_write(file)) { 104 /* 105 * In O_RDONLY mode this will be performed when reading the 106 * kernel MMAP event, in perf_event__process_mmap(). 107 */ 108 if (perf_session__create_kernel_maps(self) < 0) 109 goto out_delete; 110 } 111 112 if (tool && tool->ordering_requires_timestamps && 113 tool->ordered_samples && !perf_evlist__sample_id_all(self->evlist)) { 114 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); 115 tool->ordered_samples = false; 116 } 117 118 return self; 119 120 out_close: 121 perf_data_file__close(file); 122 out_delete: 123 perf_session__delete(self); 124 out: 125 return NULL; 126 } 127 128 static void perf_session__delete_dead_threads(struct perf_session *session) 129 { 130 machine__delete_dead_threads(&session->machines.host); 131 } 132 133 static void perf_session__delete_threads(struct perf_session *session) 134 { 135 machine__delete_threads(&session->machines.host); 136 } 137 138 static void perf_session_env__delete(struct perf_session_env *env) 139 { 140 free(env->hostname); 141 free(env->os_release); 142 free(env->version); 143 free(env->arch); 144 free(env->cpu_desc); 145 free(env->cpuid); 146 147 free(env->cmdline); 148 free(env->sibling_cores); 149 free(env->sibling_threads); 150 free(env->numa_nodes); 151 free(env->pmu_mappings); 152 } 153 154 void perf_session__delete(struct perf_session *self) 155 { 156 perf_session__destroy_kernel_maps(self); 157 perf_session__delete_dead_threads(self); 158 perf_session__delete_threads(self); 159 perf_session_env__delete(&self->header.env); 160 machines__exit(&self->machines); 161 close(self->fd); 162 free(self); 163 vdso__exit(); 164 } 165 166 static int process_event_synth_tracing_data_stub(struct perf_tool *tool 167 __maybe_unused, 168 union perf_event *event 169 __maybe_unused, 170 struct perf_session *session 171 __maybe_unused) 172 { 173 dump_printf(": unhandled!\n"); 174 return 0; 175 } 176 177 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused, 178 union perf_event *event __maybe_unused, 179 struct perf_evlist **pevlist 180 __maybe_unused) 181 { 182 dump_printf(": unhandled!\n"); 183 return 0; 184 } 185 186 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused, 187 union perf_event *event __maybe_unused, 188 struct perf_sample *sample __maybe_unused, 189 struct perf_evsel *evsel __maybe_unused, 190 struct machine *machine __maybe_unused) 191 { 192 dump_printf(": unhandled!\n"); 193 return 0; 194 } 195 196 static int process_event_stub(struct perf_tool *tool __maybe_unused, 197 union perf_event *event __maybe_unused, 198 struct perf_sample *sample __maybe_unused, 199 struct machine *machine __maybe_unused) 200 { 201 dump_printf(": unhandled!\n"); 202 return 0; 203 } 204 205 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused, 206 union perf_event *event __maybe_unused, 207 struct perf_session *perf_session 208 __maybe_unused) 209 { 210 dump_printf(": unhandled!\n"); 211 return 0; 212 } 213 214 static int process_finished_round(struct perf_tool *tool, 215 union perf_event *event, 216 struct perf_session *session); 217 218 void perf_tool__fill_defaults(struct perf_tool *tool) 219 { 220 if (tool->sample == NULL) 221 tool->sample = process_event_sample_stub; 222 if (tool->mmap == NULL) 223 tool->mmap = process_event_stub; 224 if (tool->mmap2 == NULL) 225 tool->mmap2 = process_event_stub; 226 if (tool->comm == NULL) 227 tool->comm = process_event_stub; 228 if (tool->fork == NULL) 229 tool->fork = process_event_stub; 230 if (tool->exit == NULL) 231 tool->exit = process_event_stub; 232 if (tool->lost == NULL) 233 tool->lost = perf_event__process_lost; 234 if (tool->read == NULL) 235 tool->read = process_event_sample_stub; 236 if (tool->throttle == NULL) 237 tool->throttle = process_event_stub; 238 if (tool->unthrottle == NULL) 239 tool->unthrottle = process_event_stub; 240 if (tool->attr == NULL) 241 tool->attr = process_event_synth_attr_stub; 242 if (tool->tracing_data == NULL) 243 tool->tracing_data = process_event_synth_tracing_data_stub; 244 if (tool->build_id == NULL) 245 tool->build_id = process_finished_round_stub; 246 if (tool->finished_round == NULL) { 247 if (tool->ordered_samples) 248 tool->finished_round = process_finished_round; 249 else 250 tool->finished_round = process_finished_round_stub; 251 } 252 } 253 254 void mem_bswap_32(void *src, int byte_size) 255 { 256 u32 *m = src; 257 while (byte_size > 0) { 258 *m = bswap_32(*m); 259 byte_size -= sizeof(u32); 260 ++m; 261 } 262 } 263 264 void mem_bswap_64(void *src, int byte_size) 265 { 266 u64 *m = src; 267 268 while (byte_size > 0) { 269 *m = bswap_64(*m); 270 byte_size -= sizeof(u64); 271 ++m; 272 } 273 } 274 275 static void swap_sample_id_all(union perf_event *event, void *data) 276 { 277 void *end = (void *) event + event->header.size; 278 int size = end - data; 279 280 BUG_ON(size % sizeof(u64)); 281 mem_bswap_64(data, size); 282 } 283 284 static void perf_event__all64_swap(union perf_event *event, 285 bool sample_id_all __maybe_unused) 286 { 287 struct perf_event_header *hdr = &event->header; 288 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 289 } 290 291 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 292 { 293 event->comm.pid = bswap_32(event->comm.pid); 294 event->comm.tid = bswap_32(event->comm.tid); 295 296 if (sample_id_all) { 297 void *data = &event->comm.comm; 298 299 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 300 swap_sample_id_all(event, data); 301 } 302 } 303 304 static void perf_event__mmap_swap(union perf_event *event, 305 bool sample_id_all) 306 { 307 event->mmap.pid = bswap_32(event->mmap.pid); 308 event->mmap.tid = bswap_32(event->mmap.tid); 309 event->mmap.start = bswap_64(event->mmap.start); 310 event->mmap.len = bswap_64(event->mmap.len); 311 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 312 313 if (sample_id_all) { 314 void *data = &event->mmap.filename; 315 316 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 317 swap_sample_id_all(event, data); 318 } 319 } 320 321 static void perf_event__mmap2_swap(union perf_event *event, 322 bool sample_id_all) 323 { 324 event->mmap2.pid = bswap_32(event->mmap2.pid); 325 event->mmap2.tid = bswap_32(event->mmap2.tid); 326 event->mmap2.start = bswap_64(event->mmap2.start); 327 event->mmap2.len = bswap_64(event->mmap2.len); 328 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); 329 event->mmap2.maj = bswap_32(event->mmap2.maj); 330 event->mmap2.min = bswap_32(event->mmap2.min); 331 event->mmap2.ino = bswap_64(event->mmap2.ino); 332 333 if (sample_id_all) { 334 void *data = &event->mmap2.filename; 335 336 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 337 swap_sample_id_all(event, data); 338 } 339 } 340 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 341 { 342 event->fork.pid = bswap_32(event->fork.pid); 343 event->fork.tid = bswap_32(event->fork.tid); 344 event->fork.ppid = bswap_32(event->fork.ppid); 345 event->fork.ptid = bswap_32(event->fork.ptid); 346 event->fork.time = bswap_64(event->fork.time); 347 348 if (sample_id_all) 349 swap_sample_id_all(event, &event->fork + 1); 350 } 351 352 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 353 { 354 event->read.pid = bswap_32(event->read.pid); 355 event->read.tid = bswap_32(event->read.tid); 356 event->read.value = bswap_64(event->read.value); 357 event->read.time_enabled = bswap_64(event->read.time_enabled); 358 event->read.time_running = bswap_64(event->read.time_running); 359 event->read.id = bswap_64(event->read.id); 360 361 if (sample_id_all) 362 swap_sample_id_all(event, &event->read + 1); 363 } 364 365 static void perf_event__throttle_swap(union perf_event *event, 366 bool sample_id_all) 367 { 368 event->throttle.time = bswap_64(event->throttle.time); 369 event->throttle.id = bswap_64(event->throttle.id); 370 event->throttle.stream_id = bswap_64(event->throttle.stream_id); 371 372 if (sample_id_all) 373 swap_sample_id_all(event, &event->throttle + 1); 374 } 375 376 static u8 revbyte(u8 b) 377 { 378 int rev = (b >> 4) | ((b & 0xf) << 4); 379 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 380 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 381 return (u8) rev; 382 } 383 384 /* 385 * XXX this is hack in attempt to carry flags bitfield 386 * throught endian village. ABI says: 387 * 388 * Bit-fields are allocated from right to left (least to most significant) 389 * on little-endian implementations and from left to right (most to least 390 * significant) on big-endian implementations. 391 * 392 * The above seems to be byte specific, so we need to reverse each 393 * byte of the bitfield. 'Internet' also says this might be implementation 394 * specific and we probably need proper fix and carry perf_event_attr 395 * bitfield flags in separate data file FEAT_ section. Thought this seems 396 * to work for now. 397 */ 398 static void swap_bitfield(u8 *p, unsigned len) 399 { 400 unsigned i; 401 402 for (i = 0; i < len; i++) { 403 *p = revbyte(*p); 404 p++; 405 } 406 } 407 408 /* exported for swapping attributes in file header */ 409 void perf_event__attr_swap(struct perf_event_attr *attr) 410 { 411 attr->type = bswap_32(attr->type); 412 attr->size = bswap_32(attr->size); 413 attr->config = bswap_64(attr->config); 414 attr->sample_period = bswap_64(attr->sample_period); 415 attr->sample_type = bswap_64(attr->sample_type); 416 attr->read_format = bswap_64(attr->read_format); 417 attr->wakeup_events = bswap_32(attr->wakeup_events); 418 attr->bp_type = bswap_32(attr->bp_type); 419 attr->bp_addr = bswap_64(attr->bp_addr); 420 attr->bp_len = bswap_64(attr->bp_len); 421 attr->branch_sample_type = bswap_64(attr->branch_sample_type); 422 attr->sample_regs_user = bswap_64(attr->sample_regs_user); 423 attr->sample_stack_user = bswap_32(attr->sample_stack_user); 424 425 swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64)); 426 } 427 428 static void perf_event__hdr_attr_swap(union perf_event *event, 429 bool sample_id_all __maybe_unused) 430 { 431 size_t size; 432 433 perf_event__attr_swap(&event->attr.attr); 434 435 size = event->header.size; 436 size -= (void *)&event->attr.id - (void *)event; 437 mem_bswap_64(event->attr.id, size); 438 } 439 440 static void perf_event__event_type_swap(union perf_event *event, 441 bool sample_id_all __maybe_unused) 442 { 443 event->event_type.event_type.event_id = 444 bswap_64(event->event_type.event_type.event_id); 445 } 446 447 static void perf_event__tracing_data_swap(union perf_event *event, 448 bool sample_id_all __maybe_unused) 449 { 450 event->tracing_data.size = bswap_32(event->tracing_data.size); 451 } 452 453 typedef void (*perf_event__swap_op)(union perf_event *event, 454 bool sample_id_all); 455 456 static perf_event__swap_op perf_event__swap_ops[] = { 457 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 458 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap, 459 [PERF_RECORD_COMM] = perf_event__comm_swap, 460 [PERF_RECORD_FORK] = perf_event__task_swap, 461 [PERF_RECORD_EXIT] = perf_event__task_swap, 462 [PERF_RECORD_LOST] = perf_event__all64_swap, 463 [PERF_RECORD_READ] = perf_event__read_swap, 464 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap, 465 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap, 466 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 467 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 468 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 469 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 470 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 471 [PERF_RECORD_HEADER_MAX] = NULL, 472 }; 473 474 struct sample_queue { 475 u64 timestamp; 476 u64 file_offset; 477 union perf_event *event; 478 struct list_head list; 479 }; 480 481 static void perf_session_free_sample_buffers(struct perf_session *session) 482 { 483 struct ordered_samples *os = &session->ordered_samples; 484 485 while (!list_empty(&os->to_free)) { 486 struct sample_queue *sq; 487 488 sq = list_entry(os->to_free.next, struct sample_queue, list); 489 list_del(&sq->list); 490 free(sq); 491 } 492 } 493 494 static int perf_session_deliver_event(struct perf_session *session, 495 union perf_event *event, 496 struct perf_sample *sample, 497 struct perf_tool *tool, 498 u64 file_offset); 499 500 static int flush_sample_queue(struct perf_session *s, 501 struct perf_tool *tool) 502 { 503 struct ordered_samples *os = &s->ordered_samples; 504 struct list_head *head = &os->samples; 505 struct sample_queue *tmp, *iter; 506 struct perf_sample sample; 507 u64 limit = os->next_flush; 508 u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL; 509 unsigned idx = 0, progress_next = os->nr_samples / 16; 510 bool show_progress = limit == ULLONG_MAX; 511 int ret; 512 513 if (!tool->ordered_samples || !limit) 514 return 0; 515 516 list_for_each_entry_safe(iter, tmp, head, list) { 517 if (session_done()) 518 return 0; 519 520 if (iter->timestamp > limit) 521 break; 522 523 ret = perf_evlist__parse_sample(s->evlist, iter->event, &sample); 524 if (ret) 525 pr_err("Can't parse sample, err = %d\n", ret); 526 else { 527 ret = perf_session_deliver_event(s, iter->event, &sample, tool, 528 iter->file_offset); 529 if (ret) 530 return ret; 531 } 532 533 os->last_flush = iter->timestamp; 534 list_del(&iter->list); 535 list_add(&iter->list, &os->sample_cache); 536 if (show_progress && (++idx >= progress_next)) { 537 progress_next += os->nr_samples / 16; 538 ui_progress__update(idx, os->nr_samples, 539 "Processing time ordered events..."); 540 } 541 } 542 543 if (list_empty(head)) { 544 os->last_sample = NULL; 545 } else if (last_ts <= limit) { 546 os->last_sample = 547 list_entry(head->prev, struct sample_queue, list); 548 } 549 550 os->nr_samples = 0; 551 552 return 0; 553 } 554 555 /* 556 * When perf record finishes a pass on every buffers, it records this pseudo 557 * event. 558 * We record the max timestamp t found in the pass n. 559 * Assuming these timestamps are monotonic across cpus, we know that if 560 * a buffer still has events with timestamps below t, they will be all 561 * available and then read in the pass n + 1. 562 * Hence when we start to read the pass n + 2, we can safely flush every 563 * events with timestamps below t. 564 * 565 * ============ PASS n ================= 566 * CPU 0 | CPU 1 567 * | 568 * cnt1 timestamps | cnt2 timestamps 569 * 1 | 2 570 * 2 | 3 571 * - | 4 <--- max recorded 572 * 573 * ============ PASS n + 1 ============== 574 * CPU 0 | CPU 1 575 * | 576 * cnt1 timestamps | cnt2 timestamps 577 * 3 | 5 578 * 4 | 6 579 * 5 | 7 <---- max recorded 580 * 581 * Flush every events below timestamp 4 582 * 583 * ============ PASS n + 2 ============== 584 * CPU 0 | CPU 1 585 * | 586 * cnt1 timestamps | cnt2 timestamps 587 * 6 | 8 588 * 7 | 9 589 * - | 10 590 * 591 * Flush every events below timestamp 7 592 * etc... 593 */ 594 static int process_finished_round(struct perf_tool *tool, 595 union perf_event *event __maybe_unused, 596 struct perf_session *session) 597 { 598 int ret = flush_sample_queue(session, tool); 599 if (!ret) 600 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp; 601 602 return ret; 603 } 604 605 /* The queue is ordered by time */ 606 static void __queue_event(struct sample_queue *new, struct perf_session *s) 607 { 608 struct ordered_samples *os = &s->ordered_samples; 609 struct sample_queue *sample = os->last_sample; 610 u64 timestamp = new->timestamp; 611 struct list_head *p; 612 613 ++os->nr_samples; 614 os->last_sample = new; 615 616 if (!sample) { 617 list_add(&new->list, &os->samples); 618 os->max_timestamp = timestamp; 619 return; 620 } 621 622 /* 623 * last_sample might point to some random place in the list as it's 624 * the last queued event. We expect that the new event is close to 625 * this. 626 */ 627 if (sample->timestamp <= timestamp) { 628 while (sample->timestamp <= timestamp) { 629 p = sample->list.next; 630 if (p == &os->samples) { 631 list_add_tail(&new->list, &os->samples); 632 os->max_timestamp = timestamp; 633 return; 634 } 635 sample = list_entry(p, struct sample_queue, list); 636 } 637 list_add_tail(&new->list, &sample->list); 638 } else { 639 while (sample->timestamp > timestamp) { 640 p = sample->list.prev; 641 if (p == &os->samples) { 642 list_add(&new->list, &os->samples); 643 return; 644 } 645 sample = list_entry(p, struct sample_queue, list); 646 } 647 list_add(&new->list, &sample->list); 648 } 649 } 650 651 #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue)) 652 653 int perf_session_queue_event(struct perf_session *s, union perf_event *event, 654 struct perf_sample *sample, u64 file_offset) 655 { 656 struct ordered_samples *os = &s->ordered_samples; 657 struct list_head *sc = &os->sample_cache; 658 u64 timestamp = sample->time; 659 struct sample_queue *new; 660 661 if (!timestamp || timestamp == ~0ULL) 662 return -ETIME; 663 664 if (timestamp < s->ordered_samples.last_flush) { 665 printf("Warning: Timestamp below last timeslice flush\n"); 666 return -EINVAL; 667 } 668 669 if (!list_empty(sc)) { 670 new = list_entry(sc->next, struct sample_queue, list); 671 list_del(&new->list); 672 } else if (os->sample_buffer) { 673 new = os->sample_buffer + os->sample_buffer_idx; 674 if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER) 675 os->sample_buffer = NULL; 676 } else { 677 os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new)); 678 if (!os->sample_buffer) 679 return -ENOMEM; 680 list_add(&os->sample_buffer->list, &os->to_free); 681 os->sample_buffer_idx = 2; 682 new = os->sample_buffer + 1; 683 } 684 685 new->timestamp = timestamp; 686 new->file_offset = file_offset; 687 new->event = event; 688 689 __queue_event(new, s); 690 691 return 0; 692 } 693 694 static void callchain__printf(struct perf_sample *sample) 695 { 696 unsigned int i; 697 698 printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr); 699 700 for (i = 0; i < sample->callchain->nr; i++) 701 printf("..... %2d: %016" PRIx64 "\n", 702 i, sample->callchain->ips[i]); 703 } 704 705 static void branch_stack__printf(struct perf_sample *sample) 706 { 707 uint64_t i; 708 709 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr); 710 711 for (i = 0; i < sample->branch_stack->nr; i++) 712 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n", 713 i, sample->branch_stack->entries[i].from, 714 sample->branch_stack->entries[i].to); 715 } 716 717 static void regs_dump__printf(u64 mask, u64 *regs) 718 { 719 unsigned rid, i = 0; 720 721 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { 722 u64 val = regs[i++]; 723 724 printf(".... %-5s 0x%" PRIx64 "\n", 725 perf_reg_name(rid), val); 726 } 727 } 728 729 static void regs_user__printf(struct perf_sample *sample, u64 mask) 730 { 731 struct regs_dump *user_regs = &sample->user_regs; 732 733 if (user_regs->regs) { 734 printf("... user regs: mask 0x%" PRIx64 "\n", mask); 735 regs_dump__printf(mask, user_regs->regs); 736 } 737 } 738 739 static void stack_user__printf(struct stack_dump *dump) 740 { 741 printf("... ustack: size %" PRIu64 ", offset 0x%x\n", 742 dump->size, dump->offset); 743 } 744 745 static void perf_session__print_tstamp(struct perf_session *session, 746 union perf_event *event, 747 struct perf_sample *sample) 748 { 749 u64 sample_type = __perf_evlist__combined_sample_type(session->evlist); 750 751 if (event->header.type != PERF_RECORD_SAMPLE && 752 !perf_evlist__sample_id_all(session->evlist)) { 753 fputs("-1 -1 ", stdout); 754 return; 755 } 756 757 if ((sample_type & PERF_SAMPLE_CPU)) 758 printf("%u ", sample->cpu); 759 760 if (sample_type & PERF_SAMPLE_TIME) 761 printf("%" PRIu64 " ", sample->time); 762 } 763 764 static void sample_read__printf(struct perf_sample *sample, u64 read_format) 765 { 766 printf("... sample_read:\n"); 767 768 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 769 printf("...... time enabled %016" PRIx64 "\n", 770 sample->read.time_enabled); 771 772 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 773 printf("...... time running %016" PRIx64 "\n", 774 sample->read.time_running); 775 776 if (read_format & PERF_FORMAT_GROUP) { 777 u64 i; 778 779 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr); 780 781 for (i = 0; i < sample->read.group.nr; i++) { 782 struct sample_read_value *value; 783 784 value = &sample->read.group.values[i]; 785 printf("..... id %016" PRIx64 786 ", value %016" PRIx64 "\n", 787 value->id, value->value); 788 } 789 } else 790 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n", 791 sample->read.one.id, sample->read.one.value); 792 } 793 794 static void dump_event(struct perf_session *session, union perf_event *event, 795 u64 file_offset, struct perf_sample *sample) 796 { 797 if (!dump_trace) 798 return; 799 800 printf("\n%#" PRIx64 " [%#x]: event: %d\n", 801 file_offset, event->header.size, event->header.type); 802 803 trace_event(event); 804 805 if (sample) 806 perf_session__print_tstamp(session, event, sample); 807 808 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 809 event->header.size, perf_event__name(event->header.type)); 810 } 811 812 static void dump_sample(struct perf_evsel *evsel, union perf_event *event, 813 struct perf_sample *sample) 814 { 815 u64 sample_type; 816 817 if (!dump_trace) 818 return; 819 820 printf("(IP, %d): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 821 event->header.misc, sample->pid, sample->tid, sample->ip, 822 sample->period, sample->addr); 823 824 sample_type = evsel->attr.sample_type; 825 826 if (sample_type & PERF_SAMPLE_CALLCHAIN) 827 callchain__printf(sample); 828 829 if (sample_type & PERF_SAMPLE_BRANCH_STACK) 830 branch_stack__printf(sample); 831 832 if (sample_type & PERF_SAMPLE_REGS_USER) 833 regs_user__printf(sample, evsel->attr.sample_regs_user); 834 835 if (sample_type & PERF_SAMPLE_STACK_USER) 836 stack_user__printf(&sample->user_stack); 837 838 if (sample_type & PERF_SAMPLE_WEIGHT) 839 printf("... weight: %" PRIu64 "\n", sample->weight); 840 841 if (sample_type & PERF_SAMPLE_DATA_SRC) 842 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src); 843 844 if (sample_type & PERF_SAMPLE_TRANSACTION) 845 printf("... transaction: %" PRIx64 "\n", sample->transaction); 846 847 if (sample_type & PERF_SAMPLE_READ) 848 sample_read__printf(sample, evsel->attr.read_format); 849 } 850 851 static struct machine * 852 perf_session__find_machine_for_cpumode(struct perf_session *session, 853 union perf_event *event, 854 struct perf_sample *sample) 855 { 856 const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 857 858 if (perf_guest && 859 ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 860 (cpumode == PERF_RECORD_MISC_GUEST_USER))) { 861 u32 pid; 862 863 if (event->header.type == PERF_RECORD_MMAP 864 || event->header.type == PERF_RECORD_MMAP2) 865 pid = event->mmap.pid; 866 else 867 pid = sample->pid; 868 869 return perf_session__findnew_machine(session, pid); 870 } 871 872 return &session->machines.host; 873 } 874 875 static int deliver_sample_value(struct perf_session *session, 876 struct perf_tool *tool, 877 union perf_event *event, 878 struct perf_sample *sample, 879 struct sample_read_value *v, 880 struct machine *machine) 881 { 882 struct perf_sample_id *sid; 883 884 sid = perf_evlist__id2sid(session->evlist, v->id); 885 if (sid) { 886 sample->id = v->id; 887 sample->period = v->value - sid->period; 888 sid->period = v->value; 889 } 890 891 if (!sid || sid->evsel == NULL) { 892 ++session->stats.nr_unknown_id; 893 return 0; 894 } 895 896 return tool->sample(tool, event, sample, sid->evsel, machine); 897 } 898 899 static int deliver_sample_group(struct perf_session *session, 900 struct perf_tool *tool, 901 union perf_event *event, 902 struct perf_sample *sample, 903 struct machine *machine) 904 { 905 int ret = -EINVAL; 906 u64 i; 907 908 for (i = 0; i < sample->read.group.nr; i++) { 909 ret = deliver_sample_value(session, tool, event, sample, 910 &sample->read.group.values[i], 911 machine); 912 if (ret) 913 break; 914 } 915 916 return ret; 917 } 918 919 static int 920 perf_session__deliver_sample(struct perf_session *session, 921 struct perf_tool *tool, 922 union perf_event *event, 923 struct perf_sample *sample, 924 struct perf_evsel *evsel, 925 struct machine *machine) 926 { 927 /* We know evsel != NULL. */ 928 u64 sample_type = evsel->attr.sample_type; 929 u64 read_format = evsel->attr.read_format; 930 931 /* Standard sample delievery. */ 932 if (!(sample_type & PERF_SAMPLE_READ)) 933 return tool->sample(tool, event, sample, evsel, machine); 934 935 /* For PERF_SAMPLE_READ we have either single or group mode. */ 936 if (read_format & PERF_FORMAT_GROUP) 937 return deliver_sample_group(session, tool, event, sample, 938 machine); 939 else 940 return deliver_sample_value(session, tool, event, sample, 941 &sample->read.one, machine); 942 } 943 944 static int perf_session_deliver_event(struct perf_session *session, 945 union perf_event *event, 946 struct perf_sample *sample, 947 struct perf_tool *tool, 948 u64 file_offset) 949 { 950 struct perf_evsel *evsel; 951 struct machine *machine; 952 953 dump_event(session, event, file_offset, sample); 954 955 evsel = perf_evlist__id2evsel(session->evlist, sample->id); 956 if (evsel != NULL && event->header.type != PERF_RECORD_SAMPLE) { 957 /* 958 * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here 959 * because the tools right now may apply filters, discarding 960 * some of the samples. For consistency, in the future we 961 * should have something like nr_filtered_samples and remove 962 * the sample->period from total_sample_period, etc, KISS for 963 * now tho. 964 * 965 * Also testing against NULL allows us to handle files without 966 * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the 967 * future probably it'll be a good idea to restrict event 968 * processing via perf_session to files with both set. 969 */ 970 hists__inc_nr_events(&evsel->hists, event->header.type); 971 } 972 973 machine = perf_session__find_machine_for_cpumode(session, event, 974 sample); 975 976 switch (event->header.type) { 977 case PERF_RECORD_SAMPLE: 978 dump_sample(evsel, event, sample); 979 if (evsel == NULL) { 980 ++session->stats.nr_unknown_id; 981 return 0; 982 } 983 if (machine == NULL) { 984 ++session->stats.nr_unprocessable_samples; 985 return 0; 986 } 987 return perf_session__deliver_sample(session, tool, event, 988 sample, evsel, machine); 989 case PERF_RECORD_MMAP: 990 return tool->mmap(tool, event, sample, machine); 991 case PERF_RECORD_MMAP2: 992 return tool->mmap2(tool, event, sample, machine); 993 case PERF_RECORD_COMM: 994 return tool->comm(tool, event, sample, machine); 995 case PERF_RECORD_FORK: 996 return tool->fork(tool, event, sample, machine); 997 case PERF_RECORD_EXIT: 998 return tool->exit(tool, event, sample, machine); 999 case PERF_RECORD_LOST: 1000 if (tool->lost == perf_event__process_lost) 1001 session->stats.total_lost += event->lost.lost; 1002 return tool->lost(tool, event, sample, machine); 1003 case PERF_RECORD_READ: 1004 return tool->read(tool, event, sample, evsel, machine); 1005 case PERF_RECORD_THROTTLE: 1006 return tool->throttle(tool, event, sample, machine); 1007 case PERF_RECORD_UNTHROTTLE: 1008 return tool->unthrottle(tool, event, sample, machine); 1009 default: 1010 ++session->stats.nr_unknown_events; 1011 return -1; 1012 } 1013 } 1014 1015 static int perf_session__process_user_event(struct perf_session *session, union perf_event *event, 1016 struct perf_tool *tool, u64 file_offset) 1017 { 1018 int err; 1019 1020 dump_event(session, event, file_offset, NULL); 1021 1022 /* These events are processed right away */ 1023 switch (event->header.type) { 1024 case PERF_RECORD_HEADER_ATTR: 1025 err = tool->attr(tool, event, &session->evlist); 1026 if (err == 0) 1027 perf_session__set_id_hdr_size(session); 1028 return err; 1029 case PERF_RECORD_HEADER_TRACING_DATA: 1030 /* setup for reading amidst mmap */ 1031 lseek(session->fd, file_offset, SEEK_SET); 1032 return tool->tracing_data(tool, event, session); 1033 case PERF_RECORD_HEADER_BUILD_ID: 1034 return tool->build_id(tool, event, session); 1035 case PERF_RECORD_FINISHED_ROUND: 1036 return tool->finished_round(tool, event, session); 1037 default: 1038 return -EINVAL; 1039 } 1040 } 1041 1042 static void event_swap(union perf_event *event, bool sample_id_all) 1043 { 1044 perf_event__swap_op swap; 1045 1046 swap = perf_event__swap_ops[event->header.type]; 1047 if (swap) 1048 swap(event, sample_id_all); 1049 } 1050 1051 static int perf_session__process_event(struct perf_session *session, 1052 union perf_event *event, 1053 struct perf_tool *tool, 1054 u64 file_offset) 1055 { 1056 struct perf_sample sample; 1057 int ret; 1058 1059 if (session->header.needs_swap) 1060 event_swap(event, perf_evlist__sample_id_all(session->evlist)); 1061 1062 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1063 return -EINVAL; 1064 1065 events_stats__inc(&session->stats, event->header.type); 1066 1067 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1068 return perf_session__process_user_event(session, event, tool, file_offset); 1069 1070 /* 1071 * For all kernel events we get the sample data 1072 */ 1073 ret = perf_evlist__parse_sample(session->evlist, event, &sample); 1074 if (ret) 1075 return ret; 1076 1077 if (tool->ordered_samples) { 1078 ret = perf_session_queue_event(session, event, &sample, 1079 file_offset); 1080 if (ret != -ETIME) 1081 return ret; 1082 } 1083 1084 return perf_session_deliver_event(session, event, &sample, tool, 1085 file_offset); 1086 } 1087 1088 void perf_event_header__bswap(struct perf_event_header *self) 1089 { 1090 self->type = bswap_32(self->type); 1091 self->misc = bswap_16(self->misc); 1092 self->size = bswap_16(self->size); 1093 } 1094 1095 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1096 { 1097 return machine__findnew_thread(&session->machines.host, 0, pid); 1098 } 1099 1100 static struct thread *perf_session__register_idle_thread(struct perf_session *self) 1101 { 1102 struct thread *thread = perf_session__findnew(self, 0); 1103 1104 if (thread == NULL || thread__set_comm(thread, "swapper")) { 1105 pr_err("problem inserting idle task.\n"); 1106 thread = NULL; 1107 } 1108 1109 return thread; 1110 } 1111 1112 static void perf_session__warn_about_errors(const struct perf_session *session, 1113 const struct perf_tool *tool) 1114 { 1115 if (tool->lost == perf_event__process_lost && 1116 session->stats.nr_events[PERF_RECORD_LOST] != 0) { 1117 ui__warning("Processed %d events and lost %d chunks!\n\n" 1118 "Check IO/CPU overload!\n\n", 1119 session->stats.nr_events[0], 1120 session->stats.nr_events[PERF_RECORD_LOST]); 1121 } 1122 1123 if (session->stats.nr_unknown_events != 0) { 1124 ui__warning("Found %u unknown events!\n\n" 1125 "Is this an older tool processing a perf.data " 1126 "file generated by a more recent tool?\n\n" 1127 "If that is not the case, consider " 1128 "reporting to linux-kernel@vger.kernel.org.\n\n", 1129 session->stats.nr_unknown_events); 1130 } 1131 1132 if (session->stats.nr_unknown_id != 0) { 1133 ui__warning("%u samples with id not present in the header\n", 1134 session->stats.nr_unknown_id); 1135 } 1136 1137 if (session->stats.nr_invalid_chains != 0) { 1138 ui__warning("Found invalid callchains!\n\n" 1139 "%u out of %u events were discarded for this reason.\n\n" 1140 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1141 session->stats.nr_invalid_chains, 1142 session->stats.nr_events[PERF_RECORD_SAMPLE]); 1143 } 1144 1145 if (session->stats.nr_unprocessable_samples != 0) { 1146 ui__warning("%u unprocessable samples recorded.\n" 1147 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1148 session->stats.nr_unprocessable_samples); 1149 } 1150 } 1151 1152 volatile int session_done; 1153 1154 static int __perf_session__process_pipe_events(struct perf_session *self, 1155 struct perf_tool *tool) 1156 { 1157 union perf_event *event; 1158 uint32_t size, cur_size = 0; 1159 void *buf = NULL; 1160 int skip = 0; 1161 u64 head; 1162 int err; 1163 void *p; 1164 1165 perf_tool__fill_defaults(tool); 1166 1167 head = 0; 1168 cur_size = sizeof(union perf_event); 1169 1170 buf = malloc(cur_size); 1171 if (!buf) 1172 return -errno; 1173 more: 1174 event = buf; 1175 err = readn(self->fd, event, sizeof(struct perf_event_header)); 1176 if (err <= 0) { 1177 if (err == 0) 1178 goto done; 1179 1180 pr_err("failed to read event header\n"); 1181 goto out_err; 1182 } 1183 1184 if (self->header.needs_swap) 1185 perf_event_header__bswap(&event->header); 1186 1187 size = event->header.size; 1188 if (size < sizeof(struct perf_event_header)) { 1189 pr_err("bad event header size\n"); 1190 goto out_err; 1191 } 1192 1193 if (size > cur_size) { 1194 void *new = realloc(buf, size); 1195 if (!new) { 1196 pr_err("failed to allocate memory to read event\n"); 1197 goto out_err; 1198 } 1199 buf = new; 1200 cur_size = size; 1201 event = buf; 1202 } 1203 p = event; 1204 p += sizeof(struct perf_event_header); 1205 1206 if (size - sizeof(struct perf_event_header)) { 1207 err = readn(self->fd, p, size - sizeof(struct perf_event_header)); 1208 if (err <= 0) { 1209 if (err == 0) { 1210 pr_err("unexpected end of event stream\n"); 1211 goto done; 1212 } 1213 1214 pr_err("failed to read event data\n"); 1215 goto out_err; 1216 } 1217 } 1218 1219 if ((skip = perf_session__process_event(self, event, tool, head)) < 0) { 1220 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1221 head, event->header.size, event->header.type); 1222 err = -EINVAL; 1223 goto out_err; 1224 } 1225 1226 head += size; 1227 1228 if (skip > 0) 1229 head += skip; 1230 1231 if (!session_done()) 1232 goto more; 1233 done: 1234 /* do the final flush for ordered samples */ 1235 self->ordered_samples.next_flush = ULLONG_MAX; 1236 err = flush_sample_queue(self, tool); 1237 out_err: 1238 free(buf); 1239 perf_session__warn_about_errors(self, tool); 1240 perf_session_free_sample_buffers(self); 1241 return err; 1242 } 1243 1244 static union perf_event * 1245 fetch_mmaped_event(struct perf_session *session, 1246 u64 head, size_t mmap_size, char *buf) 1247 { 1248 union perf_event *event; 1249 1250 /* 1251 * Ensure we have enough space remaining to read 1252 * the size of the event in the headers. 1253 */ 1254 if (head + sizeof(event->header) > mmap_size) 1255 return NULL; 1256 1257 event = (union perf_event *)(buf + head); 1258 1259 if (session->header.needs_swap) 1260 perf_event_header__bswap(&event->header); 1261 1262 if (head + event->header.size > mmap_size) { 1263 /* We're not fetching the event so swap back again */ 1264 if (session->header.needs_swap) 1265 perf_event_header__bswap(&event->header); 1266 return NULL; 1267 } 1268 1269 return event; 1270 } 1271 1272 /* 1273 * On 64bit we can mmap the data file in one go. No need for tiny mmap 1274 * slices. On 32bit we use 32MB. 1275 */ 1276 #if BITS_PER_LONG == 64 1277 #define MMAP_SIZE ULLONG_MAX 1278 #define NUM_MMAPS 1 1279 #else 1280 #define MMAP_SIZE (32 * 1024 * 1024ULL) 1281 #define NUM_MMAPS 128 1282 #endif 1283 1284 int __perf_session__process_events(struct perf_session *session, 1285 u64 data_offset, u64 data_size, 1286 u64 file_size, struct perf_tool *tool) 1287 { 1288 u64 head, page_offset, file_offset, file_pos, progress_next; 1289 int err, mmap_prot, mmap_flags, map_idx = 0; 1290 size_t mmap_size; 1291 char *buf, *mmaps[NUM_MMAPS]; 1292 union perf_event *event; 1293 uint32_t size; 1294 1295 perf_tool__fill_defaults(tool); 1296 1297 page_offset = page_size * (data_offset / page_size); 1298 file_offset = page_offset; 1299 head = data_offset - page_offset; 1300 1301 if (data_size && (data_offset + data_size < file_size)) 1302 file_size = data_offset + data_size; 1303 1304 progress_next = file_size / 16; 1305 1306 mmap_size = MMAP_SIZE; 1307 if (mmap_size > file_size) 1308 mmap_size = file_size; 1309 1310 memset(mmaps, 0, sizeof(mmaps)); 1311 1312 mmap_prot = PROT_READ; 1313 mmap_flags = MAP_SHARED; 1314 1315 if (session->header.needs_swap) { 1316 mmap_prot |= PROT_WRITE; 1317 mmap_flags = MAP_PRIVATE; 1318 } 1319 remap: 1320 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, session->fd, 1321 file_offset); 1322 if (buf == MAP_FAILED) { 1323 pr_err("failed to mmap file\n"); 1324 err = -errno; 1325 goto out_err; 1326 } 1327 mmaps[map_idx] = buf; 1328 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 1329 file_pos = file_offset + head; 1330 1331 more: 1332 event = fetch_mmaped_event(session, head, mmap_size, buf); 1333 if (!event) { 1334 if (mmaps[map_idx]) { 1335 munmap(mmaps[map_idx], mmap_size); 1336 mmaps[map_idx] = NULL; 1337 } 1338 1339 page_offset = page_size * (head / page_size); 1340 file_offset += page_offset; 1341 head -= page_offset; 1342 goto remap; 1343 } 1344 1345 size = event->header.size; 1346 1347 if (size < sizeof(struct perf_event_header) || 1348 perf_session__process_event(session, event, tool, file_pos) < 0) { 1349 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1350 file_offset + head, event->header.size, 1351 event->header.type); 1352 err = -EINVAL; 1353 goto out_err; 1354 } 1355 1356 head += size; 1357 file_pos += size; 1358 1359 if (file_pos >= progress_next) { 1360 progress_next += file_size / 16; 1361 ui_progress__update(file_pos, file_size, 1362 "Processing events..."); 1363 } 1364 1365 if (session_done()) 1366 goto out; 1367 1368 if (file_pos < file_size) 1369 goto more; 1370 1371 out: 1372 /* do the final flush for ordered samples */ 1373 session->ordered_samples.next_flush = ULLONG_MAX; 1374 err = flush_sample_queue(session, tool); 1375 out_err: 1376 ui_progress__finish(); 1377 perf_session__warn_about_errors(session, tool); 1378 perf_session_free_sample_buffers(session); 1379 return err; 1380 } 1381 1382 int perf_session__process_events(struct perf_session *self, 1383 struct perf_tool *tool) 1384 { 1385 int err; 1386 1387 if (perf_session__register_idle_thread(self) == NULL) 1388 return -ENOMEM; 1389 1390 if (!self->fd_pipe) 1391 err = __perf_session__process_events(self, 1392 self->header.data_offset, 1393 self->header.data_size, 1394 self->size, tool); 1395 else 1396 err = __perf_session__process_pipe_events(self, tool); 1397 1398 return err; 1399 } 1400 1401 bool perf_session__has_traces(struct perf_session *session, const char *msg) 1402 { 1403 struct perf_evsel *evsel; 1404 1405 list_for_each_entry(evsel, &session->evlist->entries, node) { 1406 if (evsel->attr.type == PERF_TYPE_TRACEPOINT) 1407 return true; 1408 } 1409 1410 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 1411 return false; 1412 } 1413 1414 int maps__set_kallsyms_ref_reloc_sym(struct map **maps, 1415 const char *symbol_name, u64 addr) 1416 { 1417 char *bracket; 1418 enum map_type i; 1419 struct ref_reloc_sym *ref; 1420 1421 ref = zalloc(sizeof(struct ref_reloc_sym)); 1422 if (ref == NULL) 1423 return -ENOMEM; 1424 1425 ref->name = strdup(symbol_name); 1426 if (ref->name == NULL) { 1427 free(ref); 1428 return -ENOMEM; 1429 } 1430 1431 bracket = strchr(ref->name, ']'); 1432 if (bracket) 1433 *bracket = '\0'; 1434 1435 ref->addr = addr; 1436 1437 for (i = 0; i < MAP__NR_TYPES; ++i) { 1438 struct kmap *kmap = map__kmap(maps[i]); 1439 kmap->ref_reloc_sym = ref; 1440 } 1441 1442 return 0; 1443 } 1444 1445 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp) 1446 { 1447 return machines__fprintf_dsos(&self->machines, fp); 1448 } 1449 1450 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp, 1451 bool (skip)(struct dso *dso, int parm), int parm) 1452 { 1453 return machines__fprintf_dsos_buildid(&self->machines, fp, skip, parm); 1454 } 1455 1456 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 1457 { 1458 struct perf_evsel *pos; 1459 size_t ret = fprintf(fp, "Aggregated stats:\n"); 1460 1461 ret += events_stats__fprintf(&session->stats, fp); 1462 1463 list_for_each_entry(pos, &session->evlist->entries, node) { 1464 ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos)); 1465 ret += events_stats__fprintf(&pos->hists.stats, fp); 1466 } 1467 1468 return ret; 1469 } 1470 1471 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 1472 { 1473 /* 1474 * FIXME: Here we have to actually print all the machines in this 1475 * session, not just the host... 1476 */ 1477 return machine__fprintf(&session->machines.host, fp); 1478 } 1479 1480 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, 1481 unsigned int type) 1482 { 1483 struct perf_evsel *pos; 1484 1485 list_for_each_entry(pos, &session->evlist->entries, node) { 1486 if (pos->attr.type == type) 1487 return pos; 1488 } 1489 return NULL; 1490 } 1491 1492 void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event, 1493 struct perf_sample *sample, struct machine *machine, 1494 unsigned int print_opts, unsigned int stack_depth) 1495 { 1496 struct addr_location al; 1497 struct callchain_cursor_node *node; 1498 int print_ip = print_opts & PRINT_IP_OPT_IP; 1499 int print_sym = print_opts & PRINT_IP_OPT_SYM; 1500 int print_dso = print_opts & PRINT_IP_OPT_DSO; 1501 int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET; 1502 int print_oneline = print_opts & PRINT_IP_OPT_ONELINE; 1503 char s = print_oneline ? ' ' : '\t'; 1504 1505 if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) { 1506 error("problem processing %d event, skipping it.\n", 1507 event->header.type); 1508 return; 1509 } 1510 1511 if (symbol_conf.use_callchain && sample->callchain) { 1512 1513 if (machine__resolve_callchain(machine, evsel, al.thread, 1514 sample, NULL, NULL) != 0) { 1515 if (verbose) 1516 error("Failed to resolve callchain. Skipping\n"); 1517 return; 1518 } 1519 callchain_cursor_commit(&callchain_cursor); 1520 1521 while (stack_depth) { 1522 node = callchain_cursor_current(&callchain_cursor); 1523 if (!node) 1524 break; 1525 1526 if (print_ip) 1527 printf("%c%16" PRIx64, s, node->ip); 1528 1529 if (print_sym) { 1530 printf(" "); 1531 if (print_symoffset) { 1532 al.addr = node->ip; 1533 al.map = node->map; 1534 symbol__fprintf_symname_offs(node->sym, &al, stdout); 1535 } else 1536 symbol__fprintf_symname(node->sym, stdout); 1537 } 1538 1539 if (print_dso) { 1540 printf(" ("); 1541 map__fprintf_dsoname(node->map, stdout); 1542 printf(")"); 1543 } 1544 1545 if (!print_oneline) 1546 printf("\n"); 1547 1548 callchain_cursor_advance(&callchain_cursor); 1549 1550 stack_depth--; 1551 } 1552 1553 } else { 1554 if (print_ip) 1555 printf("%16" PRIx64, sample->ip); 1556 1557 if (print_sym) { 1558 printf(" "); 1559 if (print_symoffset) 1560 symbol__fprintf_symname_offs(al.sym, &al, 1561 stdout); 1562 else 1563 symbol__fprintf_symname(al.sym, stdout); 1564 } 1565 1566 if (print_dso) { 1567 printf(" ("); 1568 map__fprintf_dsoname(al.map, stdout); 1569 printf(")"); 1570 } 1571 } 1572 } 1573 1574 int perf_session__cpu_bitmap(struct perf_session *session, 1575 const char *cpu_list, unsigned long *cpu_bitmap) 1576 { 1577 int i; 1578 struct cpu_map *map; 1579 1580 for (i = 0; i < PERF_TYPE_MAX; ++i) { 1581 struct perf_evsel *evsel; 1582 1583 evsel = perf_session__find_first_evtype(session, i); 1584 if (!evsel) 1585 continue; 1586 1587 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) { 1588 pr_err("File does not contain CPU events. " 1589 "Remove -c option to proceed.\n"); 1590 return -1; 1591 } 1592 } 1593 1594 map = cpu_map__new(cpu_list); 1595 if (map == NULL) { 1596 pr_err("Invalid cpu_list\n"); 1597 return -1; 1598 } 1599 1600 for (i = 0; i < map->nr; i++) { 1601 int cpu = map->map[i]; 1602 1603 if (cpu >= MAX_NR_CPUS) { 1604 pr_err("Requested CPU %d too large. " 1605 "Consider raising MAX_NR_CPUS\n", cpu); 1606 return -1; 1607 } 1608 1609 set_bit(cpu, cpu_bitmap); 1610 } 1611 1612 return 0; 1613 } 1614 1615 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 1616 bool full) 1617 { 1618 struct stat st; 1619 int ret; 1620 1621 if (session == NULL || fp == NULL) 1622 return; 1623 1624 ret = fstat(session->fd, &st); 1625 if (ret == -1) 1626 return; 1627 1628 fprintf(fp, "# ========\n"); 1629 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime)); 1630 perf_header__fprintf_info(session, fp, full); 1631 fprintf(fp, "# ========\n#\n"); 1632 } 1633 1634 1635 int __perf_session__set_tracepoints_handlers(struct perf_session *session, 1636 const struct perf_evsel_str_handler *assocs, 1637 size_t nr_assocs) 1638 { 1639 struct perf_evsel *evsel; 1640 size_t i; 1641 int err; 1642 1643 for (i = 0; i < nr_assocs; i++) { 1644 /* 1645 * Adding a handler for an event not in the session, 1646 * just ignore it. 1647 */ 1648 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name); 1649 if (evsel == NULL) 1650 continue; 1651 1652 err = -EEXIST; 1653 if (evsel->handler.func != NULL) 1654 goto out; 1655 evsel->handler.func = assocs[i].handler; 1656 } 1657 1658 err = 0; 1659 out: 1660 return err; 1661 } 1662