1 #define _FILE_OFFSET_BITS 64 2 3 #include <linux/kernel.h> 4 5 #include <byteswap.h> 6 #include <unistd.h> 7 #include <sys/types.h> 8 #include <sys/mman.h> 9 10 #include "evlist.h" 11 #include "evsel.h" 12 #include "session.h" 13 #include "tool.h" 14 #include "sort.h" 15 #include "util.h" 16 #include "cpumap.h" 17 #include "event-parse.h" 18 #include "perf_regs.h" 19 #include "vdso.h" 20 21 static int perf_session__open(struct perf_session *self, bool force) 22 { 23 struct stat input_stat; 24 25 if (!strcmp(self->filename, "-")) { 26 self->fd_pipe = true; 27 self->fd = STDIN_FILENO; 28 29 if (perf_session__read_header(self, self->fd) < 0) 30 pr_err("incompatible file format (rerun with -v to learn more)"); 31 32 return 0; 33 } 34 35 self->fd = open(self->filename, O_RDONLY); 36 if (self->fd < 0) { 37 int err = errno; 38 39 pr_err("failed to open %s: %s", self->filename, strerror(err)); 40 if (err == ENOENT && !strcmp(self->filename, "perf.data")) 41 pr_err(" (try 'perf record' first)"); 42 pr_err("\n"); 43 return -errno; 44 } 45 46 if (fstat(self->fd, &input_stat) < 0) 47 goto out_close; 48 49 if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) { 50 pr_err("file %s not owned by current user or root\n", 51 self->filename); 52 goto out_close; 53 } 54 55 if (!input_stat.st_size) { 56 pr_info("zero-sized file (%s), nothing to do!\n", 57 self->filename); 58 goto out_close; 59 } 60 61 if (perf_session__read_header(self, self->fd) < 0) { 62 pr_err("incompatible file format (rerun with -v to learn more)"); 63 goto out_close; 64 } 65 66 if (!perf_evlist__valid_sample_type(self->evlist)) { 67 pr_err("non matching sample_type"); 68 goto out_close; 69 } 70 71 if (!perf_evlist__valid_sample_id_all(self->evlist)) { 72 pr_err("non matching sample_id_all"); 73 goto out_close; 74 } 75 76 self->size = input_stat.st_size; 77 return 0; 78 79 out_close: 80 close(self->fd); 81 self->fd = -1; 82 return -1; 83 } 84 85 void perf_session__set_id_hdr_size(struct perf_session *session) 86 { 87 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist); 88 89 session->host_machine.id_hdr_size = id_hdr_size; 90 machines__set_id_hdr_size(&session->machines, id_hdr_size); 91 } 92 93 int perf_session__create_kernel_maps(struct perf_session *self) 94 { 95 int ret = machine__create_kernel_maps(&self->host_machine); 96 97 if (ret >= 0) 98 ret = machines__create_guest_kernel_maps(&self->machines); 99 return ret; 100 } 101 102 static void perf_session__destroy_kernel_maps(struct perf_session *self) 103 { 104 machine__destroy_kernel_maps(&self->host_machine); 105 machines__destroy_guest_kernel_maps(&self->machines); 106 } 107 108 struct perf_session *perf_session__new(const char *filename, int mode, 109 bool force, bool repipe, 110 struct perf_tool *tool) 111 { 112 struct perf_session *self; 113 struct stat st; 114 size_t len; 115 116 if (!filename || !strlen(filename)) { 117 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode)) 118 filename = "-"; 119 else 120 filename = "perf.data"; 121 } 122 123 len = strlen(filename); 124 self = zalloc(sizeof(*self) + len); 125 126 if (self == NULL) 127 goto out; 128 129 memcpy(self->filename, filename, len); 130 self->machines = RB_ROOT; 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 machine__init(&self->host_machine, "", HOST_KERNEL_ID); 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->host_machine); 166 } 167 168 static void perf_session__delete_threads(struct perf_session *session) 169 { 170 machine__delete_threads(&session->host_machine); 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 machine__exit(&self->host_machine); 196 close(self->fd); 197 free(self); 198 vdso__exit(); 199 } 200 201 static int process_event_synth_tracing_data_stub(union perf_event *event 202 __maybe_unused, 203 struct perf_session *session 204 __maybe_unused) 205 { 206 dump_printf(": unhandled!\n"); 207 return 0; 208 } 209 210 static int process_event_synth_attr_stub(union perf_event *event __maybe_unused, 211 struct perf_evlist **pevlist 212 __maybe_unused) 213 { 214 dump_printf(": unhandled!\n"); 215 return 0; 216 } 217 218 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused, 219 union perf_event *event __maybe_unused, 220 struct perf_sample *sample __maybe_unused, 221 struct perf_evsel *evsel __maybe_unused, 222 struct machine *machine __maybe_unused) 223 { 224 dump_printf(": unhandled!\n"); 225 return 0; 226 } 227 228 static int process_event_stub(struct perf_tool *tool __maybe_unused, 229 union perf_event *event __maybe_unused, 230 struct perf_sample *sample __maybe_unused, 231 struct machine *machine __maybe_unused) 232 { 233 dump_printf(": unhandled!\n"); 234 return 0; 235 } 236 237 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused, 238 union perf_event *event __maybe_unused, 239 struct perf_session *perf_session 240 __maybe_unused) 241 { 242 dump_printf(": unhandled!\n"); 243 return 0; 244 } 245 246 static int process_event_type_stub(struct perf_tool *tool __maybe_unused, 247 union perf_event *event __maybe_unused) 248 { 249 dump_printf(": unhandled!\n"); 250 return 0; 251 } 252 253 static int process_finished_round(struct perf_tool *tool, 254 union perf_event *event, 255 struct perf_session *session); 256 257 static void perf_tool__fill_defaults(struct perf_tool *tool) 258 { 259 if (tool->sample == NULL) 260 tool->sample = process_event_sample_stub; 261 if (tool->mmap == NULL) 262 tool->mmap = process_event_stub; 263 if (tool->comm == NULL) 264 tool->comm = process_event_stub; 265 if (tool->fork == NULL) 266 tool->fork = process_event_stub; 267 if (tool->exit == NULL) 268 tool->exit = process_event_stub; 269 if (tool->lost == NULL) 270 tool->lost = perf_event__process_lost; 271 if (tool->read == NULL) 272 tool->read = process_event_sample_stub; 273 if (tool->throttle == NULL) 274 tool->throttle = process_event_stub; 275 if (tool->unthrottle == NULL) 276 tool->unthrottle = process_event_stub; 277 if (tool->attr == NULL) 278 tool->attr = process_event_synth_attr_stub; 279 if (tool->event_type == NULL) 280 tool->event_type = process_event_type_stub; 281 if (tool->tracing_data == NULL) 282 tool->tracing_data = process_event_synth_tracing_data_stub; 283 if (tool->build_id == NULL) 284 tool->build_id = process_finished_round_stub; 285 if (tool->finished_round == NULL) { 286 if (tool->ordered_samples) 287 tool->finished_round = process_finished_round; 288 else 289 tool->finished_round = process_finished_round_stub; 290 } 291 } 292 293 void mem_bswap_32(void *src, int byte_size) 294 { 295 u32 *m = src; 296 while (byte_size > 0) { 297 *m = bswap_32(*m); 298 byte_size -= sizeof(u32); 299 ++m; 300 } 301 } 302 303 void mem_bswap_64(void *src, int byte_size) 304 { 305 u64 *m = src; 306 307 while (byte_size > 0) { 308 *m = bswap_64(*m); 309 byte_size -= sizeof(u64); 310 ++m; 311 } 312 } 313 314 static void swap_sample_id_all(union perf_event *event, void *data) 315 { 316 void *end = (void *) event + event->header.size; 317 int size = end - data; 318 319 BUG_ON(size % sizeof(u64)); 320 mem_bswap_64(data, size); 321 } 322 323 static void perf_event__all64_swap(union perf_event *event, 324 bool sample_id_all __maybe_unused) 325 { 326 struct perf_event_header *hdr = &event->header; 327 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 328 } 329 330 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 331 { 332 event->comm.pid = bswap_32(event->comm.pid); 333 event->comm.tid = bswap_32(event->comm.tid); 334 335 if (sample_id_all) { 336 void *data = &event->comm.comm; 337 338 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 339 swap_sample_id_all(event, data); 340 } 341 } 342 343 static void perf_event__mmap_swap(union perf_event *event, 344 bool sample_id_all) 345 { 346 event->mmap.pid = bswap_32(event->mmap.pid); 347 event->mmap.tid = bswap_32(event->mmap.tid); 348 event->mmap.start = bswap_64(event->mmap.start); 349 event->mmap.len = bswap_64(event->mmap.len); 350 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 351 352 if (sample_id_all) { 353 void *data = &event->mmap.filename; 354 355 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 356 swap_sample_id_all(event, data); 357 } 358 } 359 360 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 361 { 362 event->fork.pid = bswap_32(event->fork.pid); 363 event->fork.tid = bswap_32(event->fork.tid); 364 event->fork.ppid = bswap_32(event->fork.ppid); 365 event->fork.ptid = bswap_32(event->fork.ptid); 366 event->fork.time = bswap_64(event->fork.time); 367 368 if (sample_id_all) 369 swap_sample_id_all(event, &event->fork + 1); 370 } 371 372 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 373 { 374 event->read.pid = bswap_32(event->read.pid); 375 event->read.tid = bswap_32(event->read.tid); 376 event->read.value = bswap_64(event->read.value); 377 event->read.time_enabled = bswap_64(event->read.time_enabled); 378 event->read.time_running = bswap_64(event->read.time_running); 379 event->read.id = bswap_64(event->read.id); 380 381 if (sample_id_all) 382 swap_sample_id_all(event, &event->read + 1); 383 } 384 385 static u8 revbyte(u8 b) 386 { 387 int rev = (b >> 4) | ((b & 0xf) << 4); 388 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 389 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 390 return (u8) rev; 391 } 392 393 /* 394 * XXX this is hack in attempt to carry flags bitfield 395 * throught endian village. ABI says: 396 * 397 * Bit-fields are allocated from right to left (least to most significant) 398 * on little-endian implementations and from left to right (most to least 399 * significant) on big-endian implementations. 400 * 401 * The above seems to be byte specific, so we need to reverse each 402 * byte of the bitfield. 'Internet' also says this might be implementation 403 * specific and we probably need proper fix and carry perf_event_attr 404 * bitfield flags in separate data file FEAT_ section. Thought this seems 405 * to work for now. 406 */ 407 static void swap_bitfield(u8 *p, unsigned len) 408 { 409 unsigned i; 410 411 for (i = 0; i < len; i++) { 412 *p = revbyte(*p); 413 p++; 414 } 415 } 416 417 /* exported for swapping attributes in file header */ 418 void perf_event__attr_swap(struct perf_event_attr *attr) 419 { 420 attr->type = bswap_32(attr->type); 421 attr->size = bswap_32(attr->size); 422 attr->config = bswap_64(attr->config); 423 attr->sample_period = bswap_64(attr->sample_period); 424 attr->sample_type = bswap_64(attr->sample_type); 425 attr->read_format = bswap_64(attr->read_format); 426 attr->wakeup_events = bswap_32(attr->wakeup_events); 427 attr->bp_type = bswap_32(attr->bp_type); 428 attr->bp_addr = bswap_64(attr->bp_addr); 429 attr->bp_len = bswap_64(attr->bp_len); 430 431 swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64)); 432 } 433 434 static void perf_event__hdr_attr_swap(union perf_event *event, 435 bool sample_id_all __maybe_unused) 436 { 437 size_t size; 438 439 perf_event__attr_swap(&event->attr.attr); 440 441 size = event->header.size; 442 size -= (void *)&event->attr.id - (void *)event; 443 mem_bswap_64(event->attr.id, size); 444 } 445 446 static void perf_event__event_type_swap(union perf_event *event, 447 bool sample_id_all __maybe_unused) 448 { 449 event->event_type.event_type.event_id = 450 bswap_64(event->event_type.event_type.event_id); 451 } 452 453 static void perf_event__tracing_data_swap(union perf_event *event, 454 bool sample_id_all __maybe_unused) 455 { 456 event->tracing_data.size = bswap_32(event->tracing_data.size); 457 } 458 459 typedef void (*perf_event__swap_op)(union perf_event *event, 460 bool sample_id_all); 461 462 static perf_event__swap_op perf_event__swap_ops[] = { 463 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 464 [PERF_RECORD_COMM] = perf_event__comm_swap, 465 [PERF_RECORD_FORK] = perf_event__task_swap, 466 [PERF_RECORD_EXIT] = perf_event__task_swap, 467 [PERF_RECORD_LOST] = perf_event__all64_swap, 468 [PERF_RECORD_READ] = perf_event__read_swap, 469 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 470 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 471 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 472 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 473 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 474 [PERF_RECORD_HEADER_MAX] = NULL, 475 }; 476 477 struct sample_queue { 478 u64 timestamp; 479 u64 file_offset; 480 union perf_event *event; 481 struct list_head list; 482 }; 483 484 static void perf_session_free_sample_buffers(struct perf_session *session) 485 { 486 struct ordered_samples *os = &session->ordered_samples; 487 488 while (!list_empty(&os->to_free)) { 489 struct sample_queue *sq; 490 491 sq = list_entry(os->to_free.next, struct sample_queue, list); 492 list_del(&sq->list); 493 free(sq); 494 } 495 } 496 497 static int perf_session_deliver_event(struct perf_session *session, 498 union perf_event *event, 499 struct perf_sample *sample, 500 struct perf_tool *tool, 501 u64 file_offset); 502 503 static int flush_sample_queue(struct perf_session *s, 504 struct perf_tool *tool) 505 { 506 struct ordered_samples *os = &s->ordered_samples; 507 struct list_head *head = &os->samples; 508 struct sample_queue *tmp, *iter; 509 struct perf_sample sample; 510 u64 limit = os->next_flush; 511 u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL; 512 unsigned idx = 0, progress_next = os->nr_samples / 16; 513 int ret; 514 515 if (!tool->ordered_samples || !limit) 516 return 0; 517 518 list_for_each_entry_safe(iter, tmp, head, list) { 519 if (iter->timestamp > limit) 520 break; 521 522 ret = perf_evlist__parse_sample(s->evlist, iter->event, &sample); 523 if (ret) 524 pr_err("Can't parse sample, err = %d\n", ret); 525 else { 526 ret = perf_session_deliver_event(s, iter->event, &sample, tool, 527 iter->file_offset); 528 if (ret) 529 return ret; 530 } 531 532 os->last_flush = iter->timestamp; 533 list_del(&iter->list); 534 list_add(&iter->list, &os->sample_cache); 535 if (++idx >= progress_next) { 536 progress_next += os->nr_samples / 16; 537 ui_progress__update(idx, os->nr_samples, 538 "Processing time ordered events..."); 539 } 540 } 541 542 if (list_empty(head)) { 543 os->last_sample = NULL; 544 } else if (last_ts <= limit) { 545 os->last_sample = 546 list_entry(head->prev, struct sample_queue, list); 547 } 548 549 os->nr_samples = 0; 550 551 return 0; 552 } 553 554 /* 555 * When perf record finishes a pass on every buffers, it records this pseudo 556 * event. 557 * We record the max timestamp t found in the pass n. 558 * Assuming these timestamps are monotonic across cpus, we know that if 559 * a buffer still has events with timestamps below t, they will be all 560 * available and then read in the pass n + 1. 561 * Hence when we start to read the pass n + 2, we can safely flush every 562 * events with timestamps below t. 563 * 564 * ============ PASS n ================= 565 * CPU 0 | CPU 1 566 * | 567 * cnt1 timestamps | cnt2 timestamps 568 * 1 | 2 569 * 2 | 3 570 * - | 4 <--- max recorded 571 * 572 * ============ PASS n + 1 ============== 573 * CPU 0 | CPU 1 574 * | 575 * cnt1 timestamps | cnt2 timestamps 576 * 3 | 5 577 * 4 | 6 578 * 5 | 7 <---- max recorded 579 * 580 * Flush every events below timestamp 4 581 * 582 * ============ PASS n + 2 ============== 583 * CPU 0 | CPU 1 584 * | 585 * cnt1 timestamps | cnt2 timestamps 586 * 6 | 8 587 * 7 | 9 588 * - | 10 589 * 590 * Flush every events below timestamp 7 591 * etc... 592 */ 593 static int process_finished_round(struct perf_tool *tool, 594 union perf_event *event __maybe_unused, 595 struct perf_session *session) 596 { 597 int ret = flush_sample_queue(session, tool); 598 if (!ret) 599 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp; 600 601 return ret; 602 } 603 604 /* The queue is ordered by time */ 605 static void __queue_event(struct sample_queue *new, struct perf_session *s) 606 { 607 struct ordered_samples *os = &s->ordered_samples; 608 struct sample_queue *sample = os->last_sample; 609 u64 timestamp = new->timestamp; 610 struct list_head *p; 611 612 ++os->nr_samples; 613 os->last_sample = new; 614 615 if (!sample) { 616 list_add(&new->list, &os->samples); 617 os->max_timestamp = timestamp; 618 return; 619 } 620 621 /* 622 * last_sample might point to some random place in the list as it's 623 * the last queued event. We expect that the new event is close to 624 * this. 625 */ 626 if (sample->timestamp <= timestamp) { 627 while (sample->timestamp <= timestamp) { 628 p = sample->list.next; 629 if (p == &os->samples) { 630 list_add_tail(&new->list, &os->samples); 631 os->max_timestamp = timestamp; 632 return; 633 } 634 sample = list_entry(p, struct sample_queue, list); 635 } 636 list_add_tail(&new->list, &sample->list); 637 } else { 638 while (sample->timestamp > timestamp) { 639 p = sample->list.prev; 640 if (p == &os->samples) { 641 list_add(&new->list, &os->samples); 642 return; 643 } 644 sample = list_entry(p, struct sample_queue, list); 645 } 646 list_add(&new->list, &sample->list); 647 } 648 } 649 650 #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue)) 651 652 static int perf_session_queue_event(struct perf_session *s, union perf_event *event, 653 struct perf_sample *sample, u64 file_offset) 654 { 655 struct ordered_samples *os = &s->ordered_samples; 656 struct list_head *sc = &os->sample_cache; 657 u64 timestamp = sample->time; 658 struct sample_queue *new; 659 660 if (!timestamp || timestamp == ~0ULL) 661 return -ETIME; 662 663 if (timestamp < s->ordered_samples.last_flush) { 664 printf("Warning: Timestamp below last timeslice flush\n"); 665 return -EINVAL; 666 } 667 668 if (!list_empty(sc)) { 669 new = list_entry(sc->next, struct sample_queue, list); 670 list_del(&new->list); 671 } else if (os->sample_buffer) { 672 new = os->sample_buffer + os->sample_buffer_idx; 673 if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER) 674 os->sample_buffer = NULL; 675 } else { 676 os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new)); 677 if (!os->sample_buffer) 678 return -ENOMEM; 679 list_add(&os->sample_buffer->list, &os->to_free); 680 os->sample_buffer_idx = 2; 681 new = os->sample_buffer + 1; 682 } 683 684 new->timestamp = timestamp; 685 new->file_offset = file_offset; 686 new->event = event; 687 688 __queue_event(new, s); 689 690 return 0; 691 } 692 693 static void callchain__printf(struct perf_sample *sample) 694 { 695 unsigned int i; 696 697 printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr); 698 699 for (i = 0; i < sample->callchain->nr; i++) 700 printf("..... %2d: %016" PRIx64 "\n", 701 i, sample->callchain->ips[i]); 702 } 703 704 static void branch_stack__printf(struct perf_sample *sample) 705 { 706 uint64_t i; 707 708 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr); 709 710 for (i = 0; i < sample->branch_stack->nr; i++) 711 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n", 712 i, sample->branch_stack->entries[i].from, 713 sample->branch_stack->entries[i].to); 714 } 715 716 static void regs_dump__printf(u64 mask, u64 *regs) 717 { 718 unsigned rid, i = 0; 719 720 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { 721 u64 val = regs[i++]; 722 723 printf(".... %-5s 0x%" PRIx64 "\n", 724 perf_reg_name(rid), val); 725 } 726 } 727 728 static void regs_user__printf(struct perf_sample *sample, u64 mask) 729 { 730 struct regs_dump *user_regs = &sample->user_regs; 731 732 if (user_regs->regs) { 733 printf("... user regs: mask 0x%" PRIx64 "\n", mask); 734 regs_dump__printf(mask, user_regs->regs); 735 } 736 } 737 738 static void stack_user__printf(struct stack_dump *dump) 739 { 740 printf("... ustack: size %" PRIu64 ", offset 0x%x\n", 741 dump->size, dump->offset); 742 } 743 744 static void perf_session__print_tstamp(struct perf_session *session, 745 union perf_event *event, 746 struct perf_sample *sample) 747 { 748 u64 sample_type = perf_evlist__sample_type(session->evlist); 749 750 if (event->header.type != PERF_RECORD_SAMPLE && 751 !perf_evlist__sample_id_all(session->evlist)) { 752 fputs("-1 -1 ", stdout); 753 return; 754 } 755 756 if ((sample_type & PERF_SAMPLE_CPU)) 757 printf("%u ", sample->cpu); 758 759 if (sample_type & PERF_SAMPLE_TIME) 760 printf("%" PRIu64 " ", sample->time); 761 } 762 763 static void dump_event(struct perf_session *session, union perf_event *event, 764 u64 file_offset, struct perf_sample *sample) 765 { 766 if (!dump_trace) 767 return; 768 769 printf("\n%#" PRIx64 " [%#x]: event: %d\n", 770 file_offset, event->header.size, event->header.type); 771 772 trace_event(event); 773 774 if (sample) 775 perf_session__print_tstamp(session, event, sample); 776 777 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 778 event->header.size, perf_event__name(event->header.type)); 779 } 780 781 static void dump_sample(struct perf_evsel *evsel, union perf_event *event, 782 struct perf_sample *sample) 783 { 784 u64 sample_type; 785 786 if (!dump_trace) 787 return; 788 789 printf("(IP, %d): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 790 event->header.misc, sample->pid, sample->tid, sample->ip, 791 sample->period, sample->addr); 792 793 sample_type = evsel->attr.sample_type; 794 795 if (sample_type & PERF_SAMPLE_CALLCHAIN) 796 callchain__printf(sample); 797 798 if (sample_type & PERF_SAMPLE_BRANCH_STACK) 799 branch_stack__printf(sample); 800 801 if (sample_type & PERF_SAMPLE_REGS_USER) 802 regs_user__printf(sample, evsel->attr.sample_regs_user); 803 804 if (sample_type & PERF_SAMPLE_STACK_USER) 805 stack_user__printf(&sample->user_stack); 806 } 807 808 static struct machine * 809 perf_session__find_machine_for_cpumode(struct perf_session *session, 810 union perf_event *event) 811 { 812 const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 813 814 if (perf_guest && 815 ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 816 (cpumode == PERF_RECORD_MISC_GUEST_USER))) { 817 u32 pid; 818 819 if (event->header.type == PERF_RECORD_MMAP) 820 pid = event->mmap.pid; 821 else 822 pid = event->ip.pid; 823 824 return perf_session__findnew_machine(session, pid); 825 } 826 827 return perf_session__find_host_machine(session); 828 } 829 830 static int perf_session_deliver_event(struct perf_session *session, 831 union perf_event *event, 832 struct perf_sample *sample, 833 struct perf_tool *tool, 834 u64 file_offset) 835 { 836 struct perf_evsel *evsel; 837 struct machine *machine; 838 839 dump_event(session, event, file_offset, sample); 840 841 evsel = perf_evlist__id2evsel(session->evlist, sample->id); 842 if (evsel != NULL && event->header.type != PERF_RECORD_SAMPLE) { 843 /* 844 * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here 845 * because the tools right now may apply filters, discarding 846 * some of the samples. For consistency, in the future we 847 * should have something like nr_filtered_samples and remove 848 * the sample->period from total_sample_period, etc, KISS for 849 * now tho. 850 * 851 * Also testing against NULL allows us to handle files without 852 * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the 853 * future probably it'll be a good idea to restrict event 854 * processing via perf_session to files with both set. 855 */ 856 hists__inc_nr_events(&evsel->hists, event->header.type); 857 } 858 859 machine = perf_session__find_machine_for_cpumode(session, event); 860 861 switch (event->header.type) { 862 case PERF_RECORD_SAMPLE: 863 dump_sample(evsel, event, sample); 864 if (evsel == NULL) { 865 ++session->stats.nr_unknown_id; 866 return 0; 867 } 868 if (machine == NULL) { 869 ++session->stats.nr_unprocessable_samples; 870 return 0; 871 } 872 return tool->sample(tool, event, sample, evsel, machine); 873 case PERF_RECORD_MMAP: 874 return tool->mmap(tool, event, sample, machine); 875 case PERF_RECORD_COMM: 876 return tool->comm(tool, event, sample, machine); 877 case PERF_RECORD_FORK: 878 return tool->fork(tool, event, sample, machine); 879 case PERF_RECORD_EXIT: 880 return tool->exit(tool, event, sample, machine); 881 case PERF_RECORD_LOST: 882 if (tool->lost == perf_event__process_lost) 883 session->stats.total_lost += event->lost.lost; 884 return tool->lost(tool, event, sample, machine); 885 case PERF_RECORD_READ: 886 return tool->read(tool, event, sample, evsel, machine); 887 case PERF_RECORD_THROTTLE: 888 return tool->throttle(tool, event, sample, machine); 889 case PERF_RECORD_UNTHROTTLE: 890 return tool->unthrottle(tool, event, sample, machine); 891 default: 892 ++session->stats.nr_unknown_events; 893 return -1; 894 } 895 } 896 897 static int perf_session__preprocess_sample(struct perf_session *session, 898 union perf_event *event, struct perf_sample *sample) 899 { 900 if (event->header.type != PERF_RECORD_SAMPLE || 901 !(perf_evlist__sample_type(session->evlist) & PERF_SAMPLE_CALLCHAIN)) 902 return 0; 903 904 if (!ip_callchain__valid(sample->callchain, event)) { 905 pr_debug("call-chain problem with event, skipping it.\n"); 906 ++session->stats.nr_invalid_chains; 907 session->stats.total_invalid_chains += sample->period; 908 return -EINVAL; 909 } 910 return 0; 911 } 912 913 static int perf_session__process_user_event(struct perf_session *session, union perf_event *event, 914 struct perf_tool *tool, u64 file_offset) 915 { 916 int err; 917 918 dump_event(session, event, file_offset, NULL); 919 920 /* These events are processed right away */ 921 switch (event->header.type) { 922 case PERF_RECORD_HEADER_ATTR: 923 err = tool->attr(event, &session->evlist); 924 if (err == 0) 925 perf_session__set_id_hdr_size(session); 926 return err; 927 case PERF_RECORD_HEADER_EVENT_TYPE: 928 return tool->event_type(tool, event); 929 case PERF_RECORD_HEADER_TRACING_DATA: 930 /* setup for reading amidst mmap */ 931 lseek(session->fd, file_offset, SEEK_SET); 932 return tool->tracing_data(event, session); 933 case PERF_RECORD_HEADER_BUILD_ID: 934 return tool->build_id(tool, event, session); 935 case PERF_RECORD_FINISHED_ROUND: 936 return tool->finished_round(tool, event, session); 937 default: 938 return -EINVAL; 939 } 940 } 941 942 static void event_swap(union perf_event *event, bool sample_id_all) 943 { 944 perf_event__swap_op swap; 945 946 swap = perf_event__swap_ops[event->header.type]; 947 if (swap) 948 swap(event, sample_id_all); 949 } 950 951 static int perf_session__process_event(struct perf_session *session, 952 union perf_event *event, 953 struct perf_tool *tool, 954 u64 file_offset) 955 { 956 struct perf_sample sample; 957 int ret; 958 959 if (session->header.needs_swap) 960 event_swap(event, perf_evlist__sample_id_all(session->evlist)); 961 962 if (event->header.type >= PERF_RECORD_HEADER_MAX) 963 return -EINVAL; 964 965 events_stats__inc(&session->stats, event->header.type); 966 967 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 968 return perf_session__process_user_event(session, event, tool, file_offset); 969 970 /* 971 * For all kernel events we get the sample data 972 */ 973 ret = perf_evlist__parse_sample(session->evlist, event, &sample); 974 if (ret) 975 return ret; 976 977 /* Preprocess sample records - precheck callchains */ 978 if (perf_session__preprocess_sample(session, event, &sample)) 979 return 0; 980 981 if (tool->ordered_samples) { 982 ret = perf_session_queue_event(session, event, &sample, 983 file_offset); 984 if (ret != -ETIME) 985 return ret; 986 } 987 988 return perf_session_deliver_event(session, event, &sample, tool, 989 file_offset); 990 } 991 992 void perf_event_header__bswap(struct perf_event_header *self) 993 { 994 self->type = bswap_32(self->type); 995 self->misc = bswap_16(self->misc); 996 self->size = bswap_16(self->size); 997 } 998 999 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1000 { 1001 return machine__findnew_thread(&session->host_machine, pid); 1002 } 1003 1004 static struct thread *perf_session__register_idle_thread(struct perf_session *self) 1005 { 1006 struct thread *thread = perf_session__findnew(self, 0); 1007 1008 if (thread == NULL || thread__set_comm(thread, "swapper")) { 1009 pr_err("problem inserting idle task.\n"); 1010 thread = NULL; 1011 } 1012 1013 return thread; 1014 } 1015 1016 static void perf_session__warn_about_errors(const struct perf_session *session, 1017 const struct perf_tool *tool) 1018 { 1019 if (tool->lost == perf_event__process_lost && 1020 session->stats.nr_events[PERF_RECORD_LOST] != 0) { 1021 ui__warning("Processed %d events and lost %d chunks!\n\n" 1022 "Check IO/CPU overload!\n\n", 1023 session->stats.nr_events[0], 1024 session->stats.nr_events[PERF_RECORD_LOST]); 1025 } 1026 1027 if (session->stats.nr_unknown_events != 0) { 1028 ui__warning("Found %u unknown events!\n\n" 1029 "Is this an older tool processing a perf.data " 1030 "file generated by a more recent tool?\n\n" 1031 "If that is not the case, consider " 1032 "reporting to linux-kernel@vger.kernel.org.\n\n", 1033 session->stats.nr_unknown_events); 1034 } 1035 1036 if (session->stats.nr_unknown_id != 0) { 1037 ui__warning("%u samples with id not present in the header\n", 1038 session->stats.nr_unknown_id); 1039 } 1040 1041 if (session->stats.nr_invalid_chains != 0) { 1042 ui__warning("Found invalid callchains!\n\n" 1043 "%u out of %u events were discarded for this reason.\n\n" 1044 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1045 session->stats.nr_invalid_chains, 1046 session->stats.nr_events[PERF_RECORD_SAMPLE]); 1047 } 1048 1049 if (session->stats.nr_unprocessable_samples != 0) { 1050 ui__warning("%u unprocessable samples recorded.\n" 1051 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1052 session->stats.nr_unprocessable_samples); 1053 } 1054 } 1055 1056 #define session_done() (*(volatile int *)(&session_done)) 1057 volatile int session_done; 1058 1059 static int __perf_session__process_pipe_events(struct perf_session *self, 1060 struct perf_tool *tool) 1061 { 1062 union perf_event *event; 1063 uint32_t size, cur_size = 0; 1064 void *buf = NULL; 1065 int skip = 0; 1066 u64 head; 1067 int err; 1068 void *p; 1069 1070 perf_tool__fill_defaults(tool); 1071 1072 head = 0; 1073 cur_size = sizeof(union perf_event); 1074 1075 buf = malloc(cur_size); 1076 if (!buf) 1077 return -errno; 1078 more: 1079 event = buf; 1080 err = readn(self->fd, event, sizeof(struct perf_event_header)); 1081 if (err <= 0) { 1082 if (err == 0) 1083 goto done; 1084 1085 pr_err("failed to read event header\n"); 1086 goto out_err; 1087 } 1088 1089 if (self->header.needs_swap) 1090 perf_event_header__bswap(&event->header); 1091 1092 size = event->header.size; 1093 if (size == 0) 1094 size = 8; 1095 1096 if (size > cur_size) { 1097 void *new = realloc(buf, size); 1098 if (!new) { 1099 pr_err("failed to allocate memory to read event\n"); 1100 goto out_err; 1101 } 1102 buf = new; 1103 cur_size = size; 1104 event = buf; 1105 } 1106 p = event; 1107 p += sizeof(struct perf_event_header); 1108 1109 if (size - sizeof(struct perf_event_header)) { 1110 err = readn(self->fd, p, size - sizeof(struct perf_event_header)); 1111 if (err <= 0) { 1112 if (err == 0) { 1113 pr_err("unexpected end of event stream\n"); 1114 goto done; 1115 } 1116 1117 pr_err("failed to read event data\n"); 1118 goto out_err; 1119 } 1120 } 1121 1122 if ((skip = perf_session__process_event(self, event, tool, head)) < 0) { 1123 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1124 head, event->header.size, event->header.type); 1125 err = -EINVAL; 1126 goto out_err; 1127 } 1128 1129 head += size; 1130 1131 if (skip > 0) 1132 head += skip; 1133 1134 if (!session_done()) 1135 goto more; 1136 done: 1137 err = 0; 1138 out_err: 1139 free(buf); 1140 perf_session__warn_about_errors(self, tool); 1141 perf_session_free_sample_buffers(self); 1142 return err; 1143 } 1144 1145 static union perf_event * 1146 fetch_mmaped_event(struct perf_session *session, 1147 u64 head, size_t mmap_size, char *buf) 1148 { 1149 union perf_event *event; 1150 1151 /* 1152 * Ensure we have enough space remaining to read 1153 * the size of the event in the headers. 1154 */ 1155 if (head + sizeof(event->header) > mmap_size) 1156 return NULL; 1157 1158 event = (union perf_event *)(buf + head); 1159 1160 if (session->header.needs_swap) 1161 perf_event_header__bswap(&event->header); 1162 1163 if (head + event->header.size > mmap_size) 1164 return NULL; 1165 1166 return event; 1167 } 1168 1169 /* 1170 * On 64bit we can mmap the data file in one go. No need for tiny mmap 1171 * slices. On 32bit we use 32MB. 1172 */ 1173 #if BITS_PER_LONG == 64 1174 #define MMAP_SIZE ULLONG_MAX 1175 #define NUM_MMAPS 1 1176 #else 1177 #define MMAP_SIZE (32 * 1024 * 1024ULL) 1178 #define NUM_MMAPS 128 1179 #endif 1180 1181 int __perf_session__process_events(struct perf_session *session, 1182 u64 data_offset, u64 data_size, 1183 u64 file_size, struct perf_tool *tool) 1184 { 1185 u64 head, page_offset, file_offset, file_pos, progress_next; 1186 int err, mmap_prot, mmap_flags, map_idx = 0; 1187 size_t mmap_size; 1188 char *buf, *mmaps[NUM_MMAPS]; 1189 union perf_event *event; 1190 uint32_t size; 1191 1192 perf_tool__fill_defaults(tool); 1193 1194 page_offset = page_size * (data_offset / page_size); 1195 file_offset = page_offset; 1196 head = data_offset - page_offset; 1197 1198 if (data_offset + data_size < file_size) 1199 file_size = data_offset + data_size; 1200 1201 progress_next = file_size / 16; 1202 1203 mmap_size = MMAP_SIZE; 1204 if (mmap_size > file_size) 1205 mmap_size = file_size; 1206 1207 memset(mmaps, 0, sizeof(mmaps)); 1208 1209 mmap_prot = PROT_READ; 1210 mmap_flags = MAP_SHARED; 1211 1212 if (session->header.needs_swap) { 1213 mmap_prot |= PROT_WRITE; 1214 mmap_flags = MAP_PRIVATE; 1215 } 1216 remap: 1217 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, session->fd, 1218 file_offset); 1219 if (buf == MAP_FAILED) { 1220 pr_err("failed to mmap file\n"); 1221 err = -errno; 1222 goto out_err; 1223 } 1224 mmaps[map_idx] = buf; 1225 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 1226 file_pos = file_offset + head; 1227 1228 more: 1229 event = fetch_mmaped_event(session, head, mmap_size, buf); 1230 if (!event) { 1231 if (mmaps[map_idx]) { 1232 munmap(mmaps[map_idx], mmap_size); 1233 mmaps[map_idx] = NULL; 1234 } 1235 1236 page_offset = page_size * (head / page_size); 1237 file_offset += page_offset; 1238 head -= page_offset; 1239 goto remap; 1240 } 1241 1242 size = event->header.size; 1243 1244 if (size == 0 || 1245 perf_session__process_event(session, event, tool, file_pos) < 0) { 1246 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1247 file_offset + head, event->header.size, 1248 event->header.type); 1249 err = -EINVAL; 1250 goto out_err; 1251 } 1252 1253 head += size; 1254 file_pos += size; 1255 1256 if (file_pos >= progress_next) { 1257 progress_next += file_size / 16; 1258 ui_progress__update(file_pos, file_size, 1259 "Processing events..."); 1260 } 1261 1262 if (file_pos < file_size) 1263 goto more; 1264 1265 err = 0; 1266 /* do the final flush for ordered samples */ 1267 session->ordered_samples.next_flush = ULLONG_MAX; 1268 err = flush_sample_queue(session, tool); 1269 out_err: 1270 ui_progress__finish(); 1271 perf_session__warn_about_errors(session, tool); 1272 perf_session_free_sample_buffers(session); 1273 return err; 1274 } 1275 1276 int perf_session__process_events(struct perf_session *self, 1277 struct perf_tool *tool) 1278 { 1279 int err; 1280 1281 if (perf_session__register_idle_thread(self) == NULL) 1282 return -ENOMEM; 1283 1284 if (!self->fd_pipe) 1285 err = __perf_session__process_events(self, 1286 self->header.data_offset, 1287 self->header.data_size, 1288 self->size, tool); 1289 else 1290 err = __perf_session__process_pipe_events(self, tool); 1291 1292 return err; 1293 } 1294 1295 bool perf_session__has_traces(struct perf_session *session, const char *msg) 1296 { 1297 if (!(perf_evlist__sample_type(session->evlist) & PERF_SAMPLE_RAW)) { 1298 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 1299 return false; 1300 } 1301 1302 return true; 1303 } 1304 1305 int maps__set_kallsyms_ref_reloc_sym(struct map **maps, 1306 const char *symbol_name, u64 addr) 1307 { 1308 char *bracket; 1309 enum map_type i; 1310 struct ref_reloc_sym *ref; 1311 1312 ref = zalloc(sizeof(struct ref_reloc_sym)); 1313 if (ref == NULL) 1314 return -ENOMEM; 1315 1316 ref->name = strdup(symbol_name); 1317 if (ref->name == NULL) { 1318 free(ref); 1319 return -ENOMEM; 1320 } 1321 1322 bracket = strchr(ref->name, ']'); 1323 if (bracket) 1324 *bracket = '\0'; 1325 1326 ref->addr = addr; 1327 1328 for (i = 0; i < MAP__NR_TYPES; ++i) { 1329 struct kmap *kmap = map__kmap(maps[i]); 1330 kmap->ref_reloc_sym = ref; 1331 } 1332 1333 return 0; 1334 } 1335 1336 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp) 1337 { 1338 return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) + 1339 __dsos__fprintf(&self->host_machine.user_dsos, fp) + 1340 machines__fprintf_dsos(&self->machines, fp); 1341 } 1342 1343 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp, 1344 bool (skip)(struct dso *dso, int parm), int parm) 1345 { 1346 size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, skip, parm); 1347 return ret + machines__fprintf_dsos_buildid(&self->machines, fp, skip, parm); 1348 } 1349 1350 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 1351 { 1352 struct perf_evsel *pos; 1353 size_t ret = fprintf(fp, "Aggregated stats:\n"); 1354 1355 ret += events_stats__fprintf(&session->stats, fp); 1356 1357 list_for_each_entry(pos, &session->evlist->entries, node) { 1358 ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos)); 1359 ret += events_stats__fprintf(&pos->hists.stats, fp); 1360 } 1361 1362 return ret; 1363 } 1364 1365 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 1366 { 1367 /* 1368 * FIXME: Here we have to actually print all the machines in this 1369 * session, not just the host... 1370 */ 1371 return machine__fprintf(&session->host_machine, fp); 1372 } 1373 1374 void perf_session__remove_thread(struct perf_session *session, 1375 struct thread *th) 1376 { 1377 /* 1378 * FIXME: This one makes no sense, we need to remove the thread from 1379 * the machine it belongs to, perf_session can have many machines, so 1380 * doing it always on ->host_machine is wrong. Fix when auditing all 1381 * the 'perf kvm' code. 1382 */ 1383 machine__remove_thread(&session->host_machine, th); 1384 } 1385 1386 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, 1387 unsigned int type) 1388 { 1389 struct perf_evsel *pos; 1390 1391 list_for_each_entry(pos, &session->evlist->entries, node) { 1392 if (pos->attr.type == type) 1393 return pos; 1394 } 1395 return NULL; 1396 } 1397 1398 void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event, 1399 struct perf_sample *sample, struct machine *machine, 1400 int print_sym, int print_dso, int print_symoffset) 1401 { 1402 struct addr_location al; 1403 struct callchain_cursor_node *node; 1404 1405 if (perf_event__preprocess_sample(event, machine, &al, sample, 1406 NULL) < 0) { 1407 error("problem processing %d event, skipping it.\n", 1408 event->header.type); 1409 return; 1410 } 1411 1412 if (symbol_conf.use_callchain && sample->callchain) { 1413 1414 1415 if (machine__resolve_callchain(machine, evsel, al.thread, 1416 sample, NULL) != 0) { 1417 if (verbose) 1418 error("Failed to resolve callchain. Skipping\n"); 1419 return; 1420 } 1421 callchain_cursor_commit(&callchain_cursor); 1422 1423 while (1) { 1424 node = callchain_cursor_current(&callchain_cursor); 1425 if (!node) 1426 break; 1427 1428 printf("\t%16" PRIx64, node->ip); 1429 if (print_sym) { 1430 printf(" "); 1431 symbol__fprintf_symname(node->sym, stdout); 1432 } 1433 if (print_dso) { 1434 printf(" ("); 1435 map__fprintf_dsoname(node->map, stdout); 1436 printf(")"); 1437 } 1438 printf("\n"); 1439 1440 callchain_cursor_advance(&callchain_cursor); 1441 } 1442 1443 } else { 1444 printf("%16" PRIx64, sample->ip); 1445 if (print_sym) { 1446 printf(" "); 1447 if (print_symoffset) 1448 symbol__fprintf_symname_offs(al.sym, &al, 1449 stdout); 1450 else 1451 symbol__fprintf_symname(al.sym, stdout); 1452 } 1453 1454 if (print_dso) { 1455 printf(" ("); 1456 map__fprintf_dsoname(al.map, stdout); 1457 printf(")"); 1458 } 1459 } 1460 } 1461 1462 int perf_session__cpu_bitmap(struct perf_session *session, 1463 const char *cpu_list, unsigned long *cpu_bitmap) 1464 { 1465 int i; 1466 struct cpu_map *map; 1467 1468 for (i = 0; i < PERF_TYPE_MAX; ++i) { 1469 struct perf_evsel *evsel; 1470 1471 evsel = perf_session__find_first_evtype(session, i); 1472 if (!evsel) 1473 continue; 1474 1475 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) { 1476 pr_err("File does not contain CPU events. " 1477 "Remove -c option to proceed.\n"); 1478 return -1; 1479 } 1480 } 1481 1482 map = cpu_map__new(cpu_list); 1483 if (map == NULL) { 1484 pr_err("Invalid cpu_list\n"); 1485 return -1; 1486 } 1487 1488 for (i = 0; i < map->nr; i++) { 1489 int cpu = map->map[i]; 1490 1491 if (cpu >= MAX_NR_CPUS) { 1492 pr_err("Requested CPU %d too large. " 1493 "Consider raising MAX_NR_CPUS\n", cpu); 1494 return -1; 1495 } 1496 1497 set_bit(cpu, cpu_bitmap); 1498 } 1499 1500 return 0; 1501 } 1502 1503 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 1504 bool full) 1505 { 1506 struct stat st; 1507 int ret; 1508 1509 if (session == NULL || fp == NULL) 1510 return; 1511 1512 ret = fstat(session->fd, &st); 1513 if (ret == -1) 1514 return; 1515 1516 fprintf(fp, "# ========\n"); 1517 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime)); 1518 perf_header__fprintf_info(session, fp, full); 1519 fprintf(fp, "# ========\n#\n"); 1520 } 1521 1522 1523 int __perf_session__set_tracepoints_handlers(struct perf_session *session, 1524 const struct perf_evsel_str_handler *assocs, 1525 size_t nr_assocs) 1526 { 1527 struct perf_evlist *evlist = session->evlist; 1528 struct event_format *format; 1529 struct perf_evsel *evsel; 1530 char *tracepoint, *name; 1531 size_t i; 1532 int err; 1533 1534 for (i = 0; i < nr_assocs; i++) { 1535 err = -ENOMEM; 1536 tracepoint = strdup(assocs[i].name); 1537 if (tracepoint == NULL) 1538 goto out; 1539 1540 err = -ENOENT; 1541 name = strchr(tracepoint, ':'); 1542 if (name == NULL) 1543 goto out_free; 1544 1545 *name++ = '\0'; 1546 format = pevent_find_event_by_name(session->pevent, 1547 tracepoint, name); 1548 if (format == NULL) { 1549 /* 1550 * Adding a handler for an event not in the session, 1551 * just ignore it. 1552 */ 1553 goto next; 1554 } 1555 1556 evsel = perf_evlist__find_tracepoint_by_id(evlist, format->id); 1557 if (evsel == NULL) 1558 goto next; 1559 1560 err = -EEXIST; 1561 if (evsel->handler.func != NULL) 1562 goto out_free; 1563 evsel->handler.func = assocs[i].handler; 1564 next: 1565 free(tracepoint); 1566 } 1567 1568 err = 0; 1569 out: 1570 return err; 1571 1572 out_free: 1573 free(tracepoint); 1574 goto out; 1575 } 1576