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 "unwind.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 /* 131 * On 64bit we can mmap the data file in one go. No need for tiny mmap 132 * slices. On 32bit we use 32MB. 133 */ 134 #if BITS_PER_LONG == 64 135 self->mmap_window = ULLONG_MAX; 136 #else 137 self->mmap_window = 32 * 1024 * 1024ULL; 138 #endif 139 self->machines = RB_ROOT; 140 self->repipe = repipe; 141 INIT_LIST_HEAD(&self->ordered_samples.samples); 142 INIT_LIST_HEAD(&self->ordered_samples.sample_cache); 143 INIT_LIST_HEAD(&self->ordered_samples.to_free); 144 machine__init(&self->host_machine, "", HOST_KERNEL_ID); 145 hists__init(&self->hists); 146 147 if (mode == O_RDONLY) { 148 if (perf_session__open(self, force) < 0) 149 goto out_delete; 150 perf_session__set_id_hdr_size(self); 151 } else if (mode == O_WRONLY) { 152 /* 153 * In O_RDONLY mode this will be performed when reading the 154 * kernel MMAP event, in perf_event__process_mmap(). 155 */ 156 if (perf_session__create_kernel_maps(self) < 0) 157 goto out_delete; 158 } 159 160 if (tool && tool->ordering_requires_timestamps && 161 tool->ordered_samples && !perf_evlist__sample_id_all(self->evlist)) { 162 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); 163 tool->ordered_samples = false; 164 } 165 166 out: 167 return self; 168 out_delete: 169 perf_session__delete(self); 170 return NULL; 171 } 172 173 static void machine__delete_dead_threads(struct machine *machine) 174 { 175 struct thread *n, *t; 176 177 list_for_each_entry_safe(t, n, &machine->dead_threads, node) { 178 list_del(&t->node); 179 thread__delete(t); 180 } 181 } 182 183 static void perf_session__delete_dead_threads(struct perf_session *session) 184 { 185 machine__delete_dead_threads(&session->host_machine); 186 } 187 188 static void machine__delete_threads(struct machine *self) 189 { 190 struct rb_node *nd = rb_first(&self->threads); 191 192 while (nd) { 193 struct thread *t = rb_entry(nd, struct thread, rb_node); 194 195 rb_erase(&t->rb_node, &self->threads); 196 nd = rb_next(nd); 197 thread__delete(t); 198 } 199 } 200 201 static void perf_session__delete_threads(struct perf_session *session) 202 { 203 machine__delete_threads(&session->host_machine); 204 } 205 206 void perf_session__delete(struct perf_session *self) 207 { 208 perf_session__destroy_kernel_maps(self); 209 perf_session__delete_dead_threads(self); 210 perf_session__delete_threads(self); 211 machine__exit(&self->host_machine); 212 close(self->fd); 213 free(self); 214 } 215 216 void machine__remove_thread(struct machine *self, struct thread *th) 217 { 218 self->last_match = NULL; 219 rb_erase(&th->rb_node, &self->threads); 220 /* 221 * We may have references to this thread, for instance in some hist_entry 222 * instances, so just move them to a separate list. 223 */ 224 list_add_tail(&th->node, &self->dead_threads); 225 } 226 227 static bool symbol__match_parent_regex(struct symbol *sym) 228 { 229 if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0)) 230 return 1; 231 232 return 0; 233 } 234 235 static const u8 cpumodes[] = { 236 PERF_RECORD_MISC_USER, 237 PERF_RECORD_MISC_KERNEL, 238 PERF_RECORD_MISC_GUEST_USER, 239 PERF_RECORD_MISC_GUEST_KERNEL 240 }; 241 #define NCPUMODES (sizeof(cpumodes)/sizeof(u8)) 242 243 static void ip__resolve_ams(struct machine *self, struct thread *thread, 244 struct addr_map_symbol *ams, 245 u64 ip) 246 { 247 struct addr_location al; 248 size_t i; 249 u8 m; 250 251 memset(&al, 0, sizeof(al)); 252 253 for (i = 0; i < NCPUMODES; i++) { 254 m = cpumodes[i]; 255 /* 256 * We cannot use the header.misc hint to determine whether a 257 * branch stack address is user, kernel, guest, hypervisor. 258 * Branches may straddle the kernel/user/hypervisor boundaries. 259 * Thus, we have to try consecutively until we find a match 260 * or else, the symbol is unknown 261 */ 262 thread__find_addr_location(thread, self, m, MAP__FUNCTION, 263 ip, &al, NULL); 264 if (al.sym) 265 goto found; 266 } 267 found: 268 ams->addr = ip; 269 ams->al_addr = al.addr; 270 ams->sym = al.sym; 271 ams->map = al.map; 272 } 273 274 struct branch_info *machine__resolve_bstack(struct machine *self, 275 struct thread *thr, 276 struct branch_stack *bs) 277 { 278 struct branch_info *bi; 279 unsigned int i; 280 281 bi = calloc(bs->nr, sizeof(struct branch_info)); 282 if (!bi) 283 return NULL; 284 285 for (i = 0; i < bs->nr; i++) { 286 ip__resolve_ams(self, thr, &bi[i].to, bs->entries[i].to); 287 ip__resolve_ams(self, thr, &bi[i].from, bs->entries[i].from); 288 bi[i].flags = bs->entries[i].flags; 289 } 290 return bi; 291 } 292 293 static int machine__resolve_callchain_sample(struct machine *machine, 294 struct thread *thread, 295 struct ip_callchain *chain, 296 struct symbol **parent) 297 298 { 299 u8 cpumode = PERF_RECORD_MISC_USER; 300 unsigned int i; 301 int err; 302 303 callchain_cursor_reset(&callchain_cursor); 304 305 if (chain->nr > PERF_MAX_STACK_DEPTH) { 306 pr_warning("corrupted callchain. skipping...\n"); 307 return 0; 308 } 309 310 for (i = 0; i < chain->nr; i++) { 311 u64 ip; 312 struct addr_location al; 313 314 if (callchain_param.order == ORDER_CALLEE) 315 ip = chain->ips[i]; 316 else 317 ip = chain->ips[chain->nr - i - 1]; 318 319 if (ip >= PERF_CONTEXT_MAX) { 320 switch (ip) { 321 case PERF_CONTEXT_HV: 322 cpumode = PERF_RECORD_MISC_HYPERVISOR; 323 break; 324 case PERF_CONTEXT_KERNEL: 325 cpumode = PERF_RECORD_MISC_KERNEL; 326 break; 327 case PERF_CONTEXT_USER: 328 cpumode = PERF_RECORD_MISC_USER; 329 break; 330 default: 331 pr_debug("invalid callchain context: " 332 "%"PRId64"\n", (s64) ip); 333 /* 334 * It seems the callchain is corrupted. 335 * Discard all. 336 */ 337 callchain_cursor_reset(&callchain_cursor); 338 return 0; 339 } 340 continue; 341 } 342 343 al.filtered = false; 344 thread__find_addr_location(thread, machine, cpumode, 345 MAP__FUNCTION, ip, &al, NULL); 346 if (al.sym != NULL) { 347 if (sort__has_parent && !*parent && 348 symbol__match_parent_regex(al.sym)) 349 *parent = al.sym; 350 if (!symbol_conf.use_callchain) 351 break; 352 } 353 354 err = callchain_cursor_append(&callchain_cursor, 355 ip, al.map, al.sym); 356 if (err) 357 return err; 358 } 359 360 return 0; 361 } 362 363 static int unwind_entry(struct unwind_entry *entry, void *arg) 364 { 365 struct callchain_cursor *cursor = arg; 366 return callchain_cursor_append(cursor, entry->ip, 367 entry->map, entry->sym); 368 } 369 370 int machine__resolve_callchain(struct machine *machine, 371 struct perf_evsel *evsel, 372 struct thread *thread, 373 struct perf_sample *sample, 374 struct symbol **parent) 375 376 { 377 int ret; 378 379 callchain_cursor_reset(&callchain_cursor); 380 381 ret = machine__resolve_callchain_sample(machine, thread, 382 sample->callchain, parent); 383 if (ret) 384 return ret; 385 386 /* Can we do dwarf post unwind? */ 387 if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) && 388 (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER))) 389 return 0; 390 391 return unwind__get_entries(unwind_entry, &callchain_cursor, machine, 392 thread, evsel->attr.sample_regs_user, 393 sample); 394 395 } 396 397 static int process_event_synth_tracing_data_stub(union perf_event *event __used, 398 struct perf_session *session __used) 399 { 400 dump_printf(": unhandled!\n"); 401 return 0; 402 } 403 404 static int process_event_synth_attr_stub(union perf_event *event __used, 405 struct perf_evlist **pevlist __used) 406 { 407 dump_printf(": unhandled!\n"); 408 return 0; 409 } 410 411 static int process_event_sample_stub(struct perf_tool *tool __used, 412 union perf_event *event __used, 413 struct perf_sample *sample __used, 414 struct perf_evsel *evsel __used, 415 struct machine *machine __used) 416 { 417 dump_printf(": unhandled!\n"); 418 return 0; 419 } 420 421 static int process_event_stub(struct perf_tool *tool __used, 422 union perf_event *event __used, 423 struct perf_sample *sample __used, 424 struct machine *machine __used) 425 { 426 dump_printf(": unhandled!\n"); 427 return 0; 428 } 429 430 static int process_finished_round_stub(struct perf_tool *tool __used, 431 union perf_event *event __used, 432 struct perf_session *perf_session __used) 433 { 434 dump_printf(": unhandled!\n"); 435 return 0; 436 } 437 438 static int process_event_type_stub(struct perf_tool *tool __used, 439 union perf_event *event __used) 440 { 441 dump_printf(": unhandled!\n"); 442 return 0; 443 } 444 445 static int process_finished_round(struct perf_tool *tool, 446 union perf_event *event, 447 struct perf_session *session); 448 449 static void perf_tool__fill_defaults(struct perf_tool *tool) 450 { 451 if (tool->sample == NULL) 452 tool->sample = process_event_sample_stub; 453 if (tool->mmap == NULL) 454 tool->mmap = process_event_stub; 455 if (tool->comm == NULL) 456 tool->comm = process_event_stub; 457 if (tool->fork == NULL) 458 tool->fork = process_event_stub; 459 if (tool->exit == NULL) 460 tool->exit = process_event_stub; 461 if (tool->lost == NULL) 462 tool->lost = perf_event__process_lost; 463 if (tool->read == NULL) 464 tool->read = process_event_sample_stub; 465 if (tool->throttle == NULL) 466 tool->throttle = process_event_stub; 467 if (tool->unthrottle == NULL) 468 tool->unthrottle = process_event_stub; 469 if (tool->attr == NULL) 470 tool->attr = process_event_synth_attr_stub; 471 if (tool->event_type == NULL) 472 tool->event_type = process_event_type_stub; 473 if (tool->tracing_data == NULL) 474 tool->tracing_data = process_event_synth_tracing_data_stub; 475 if (tool->build_id == NULL) 476 tool->build_id = process_finished_round_stub; 477 if (tool->finished_round == NULL) { 478 if (tool->ordered_samples) 479 tool->finished_round = process_finished_round; 480 else 481 tool->finished_round = process_finished_round_stub; 482 } 483 } 484 485 void mem_bswap_32(void *src, int byte_size) 486 { 487 u32 *m = src; 488 while (byte_size > 0) { 489 *m = bswap_32(*m); 490 byte_size -= sizeof(u32); 491 ++m; 492 } 493 } 494 495 void mem_bswap_64(void *src, int byte_size) 496 { 497 u64 *m = src; 498 499 while (byte_size > 0) { 500 *m = bswap_64(*m); 501 byte_size -= sizeof(u64); 502 ++m; 503 } 504 } 505 506 static void swap_sample_id_all(union perf_event *event, void *data) 507 { 508 void *end = (void *) event + event->header.size; 509 int size = end - data; 510 511 BUG_ON(size % sizeof(u64)); 512 mem_bswap_64(data, size); 513 } 514 515 static void perf_event__all64_swap(union perf_event *event, 516 bool sample_id_all __used) 517 { 518 struct perf_event_header *hdr = &event->header; 519 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 520 } 521 522 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 523 { 524 event->comm.pid = bswap_32(event->comm.pid); 525 event->comm.tid = bswap_32(event->comm.tid); 526 527 if (sample_id_all) { 528 void *data = &event->comm.comm; 529 530 data += ALIGN(strlen(data) + 1, sizeof(u64)); 531 swap_sample_id_all(event, data); 532 } 533 } 534 535 static void perf_event__mmap_swap(union perf_event *event, 536 bool sample_id_all) 537 { 538 event->mmap.pid = bswap_32(event->mmap.pid); 539 event->mmap.tid = bswap_32(event->mmap.tid); 540 event->mmap.start = bswap_64(event->mmap.start); 541 event->mmap.len = bswap_64(event->mmap.len); 542 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 543 544 if (sample_id_all) { 545 void *data = &event->mmap.filename; 546 547 data += ALIGN(strlen(data) + 1, sizeof(u64)); 548 swap_sample_id_all(event, data); 549 } 550 } 551 552 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 553 { 554 event->fork.pid = bswap_32(event->fork.pid); 555 event->fork.tid = bswap_32(event->fork.tid); 556 event->fork.ppid = bswap_32(event->fork.ppid); 557 event->fork.ptid = bswap_32(event->fork.ptid); 558 event->fork.time = bswap_64(event->fork.time); 559 560 if (sample_id_all) 561 swap_sample_id_all(event, &event->fork + 1); 562 } 563 564 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 565 { 566 event->read.pid = bswap_32(event->read.pid); 567 event->read.tid = bswap_32(event->read.tid); 568 event->read.value = bswap_64(event->read.value); 569 event->read.time_enabled = bswap_64(event->read.time_enabled); 570 event->read.time_running = bswap_64(event->read.time_running); 571 event->read.id = bswap_64(event->read.id); 572 573 if (sample_id_all) 574 swap_sample_id_all(event, &event->read + 1); 575 } 576 577 static u8 revbyte(u8 b) 578 { 579 int rev = (b >> 4) | ((b & 0xf) << 4); 580 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 581 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 582 return (u8) rev; 583 } 584 585 /* 586 * XXX this is hack in attempt to carry flags bitfield 587 * throught endian village. ABI says: 588 * 589 * Bit-fields are allocated from right to left (least to most significant) 590 * on little-endian implementations and from left to right (most to least 591 * significant) on big-endian implementations. 592 * 593 * The above seems to be byte specific, so we need to reverse each 594 * byte of the bitfield. 'Internet' also says this might be implementation 595 * specific and we probably need proper fix and carry perf_event_attr 596 * bitfield flags in separate data file FEAT_ section. Thought this seems 597 * to work for now. 598 */ 599 static void swap_bitfield(u8 *p, unsigned len) 600 { 601 unsigned i; 602 603 for (i = 0; i < len; i++) { 604 *p = revbyte(*p); 605 p++; 606 } 607 } 608 609 /* exported for swapping attributes in file header */ 610 void perf_event__attr_swap(struct perf_event_attr *attr) 611 { 612 attr->type = bswap_32(attr->type); 613 attr->size = bswap_32(attr->size); 614 attr->config = bswap_64(attr->config); 615 attr->sample_period = bswap_64(attr->sample_period); 616 attr->sample_type = bswap_64(attr->sample_type); 617 attr->read_format = bswap_64(attr->read_format); 618 attr->wakeup_events = bswap_32(attr->wakeup_events); 619 attr->bp_type = bswap_32(attr->bp_type); 620 attr->bp_addr = bswap_64(attr->bp_addr); 621 attr->bp_len = bswap_64(attr->bp_len); 622 623 swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64)); 624 } 625 626 static void perf_event__hdr_attr_swap(union perf_event *event, 627 bool sample_id_all __used) 628 { 629 size_t size; 630 631 perf_event__attr_swap(&event->attr.attr); 632 633 size = event->header.size; 634 size -= (void *)&event->attr.id - (void *)event; 635 mem_bswap_64(event->attr.id, size); 636 } 637 638 static void perf_event__event_type_swap(union perf_event *event, 639 bool sample_id_all __used) 640 { 641 event->event_type.event_type.event_id = 642 bswap_64(event->event_type.event_type.event_id); 643 } 644 645 static void perf_event__tracing_data_swap(union perf_event *event, 646 bool sample_id_all __used) 647 { 648 event->tracing_data.size = bswap_32(event->tracing_data.size); 649 } 650 651 typedef void (*perf_event__swap_op)(union perf_event *event, 652 bool sample_id_all); 653 654 static perf_event__swap_op perf_event__swap_ops[] = { 655 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 656 [PERF_RECORD_COMM] = perf_event__comm_swap, 657 [PERF_RECORD_FORK] = perf_event__task_swap, 658 [PERF_RECORD_EXIT] = perf_event__task_swap, 659 [PERF_RECORD_LOST] = perf_event__all64_swap, 660 [PERF_RECORD_READ] = perf_event__read_swap, 661 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 662 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 663 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 664 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 665 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 666 [PERF_RECORD_HEADER_MAX] = NULL, 667 }; 668 669 struct sample_queue { 670 u64 timestamp; 671 u64 file_offset; 672 union perf_event *event; 673 struct list_head list; 674 }; 675 676 static void perf_session_free_sample_buffers(struct perf_session *session) 677 { 678 struct ordered_samples *os = &session->ordered_samples; 679 680 while (!list_empty(&os->to_free)) { 681 struct sample_queue *sq; 682 683 sq = list_entry(os->to_free.next, struct sample_queue, list); 684 list_del(&sq->list); 685 free(sq); 686 } 687 } 688 689 static int perf_session_deliver_event(struct perf_session *session, 690 union perf_event *event, 691 struct perf_sample *sample, 692 struct perf_tool *tool, 693 u64 file_offset); 694 695 static void flush_sample_queue(struct perf_session *s, 696 struct perf_tool *tool) 697 { 698 struct ordered_samples *os = &s->ordered_samples; 699 struct list_head *head = &os->samples; 700 struct sample_queue *tmp, *iter; 701 struct perf_sample sample; 702 u64 limit = os->next_flush; 703 u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL; 704 unsigned idx = 0, progress_next = os->nr_samples / 16; 705 int ret; 706 707 if (!tool->ordered_samples || !limit) 708 return; 709 710 list_for_each_entry_safe(iter, tmp, head, list) { 711 if (iter->timestamp > limit) 712 break; 713 714 ret = perf_evlist__parse_sample(s->evlist, iter->event, &sample, 715 s->header.needs_swap); 716 if (ret) 717 pr_err("Can't parse sample, err = %d\n", ret); 718 else 719 perf_session_deliver_event(s, iter->event, &sample, tool, 720 iter->file_offset); 721 722 os->last_flush = iter->timestamp; 723 list_del(&iter->list); 724 list_add(&iter->list, &os->sample_cache); 725 if (++idx >= progress_next) { 726 progress_next += os->nr_samples / 16; 727 ui_progress__update(idx, os->nr_samples, 728 "Processing time ordered events..."); 729 } 730 } 731 732 if (list_empty(head)) { 733 os->last_sample = NULL; 734 } else if (last_ts <= limit) { 735 os->last_sample = 736 list_entry(head->prev, struct sample_queue, list); 737 } 738 739 os->nr_samples = 0; 740 } 741 742 /* 743 * When perf record finishes a pass on every buffers, it records this pseudo 744 * event. 745 * We record the max timestamp t found in the pass n. 746 * Assuming these timestamps are monotonic across cpus, we know that if 747 * a buffer still has events with timestamps below t, they will be all 748 * available and then read in the pass n + 1. 749 * Hence when we start to read the pass n + 2, we can safely flush every 750 * events with timestamps below t. 751 * 752 * ============ PASS n ================= 753 * CPU 0 | CPU 1 754 * | 755 * cnt1 timestamps | cnt2 timestamps 756 * 1 | 2 757 * 2 | 3 758 * - | 4 <--- max recorded 759 * 760 * ============ PASS n + 1 ============== 761 * CPU 0 | CPU 1 762 * | 763 * cnt1 timestamps | cnt2 timestamps 764 * 3 | 5 765 * 4 | 6 766 * 5 | 7 <---- max recorded 767 * 768 * Flush every events below timestamp 4 769 * 770 * ============ PASS n + 2 ============== 771 * CPU 0 | CPU 1 772 * | 773 * cnt1 timestamps | cnt2 timestamps 774 * 6 | 8 775 * 7 | 9 776 * - | 10 777 * 778 * Flush every events below timestamp 7 779 * etc... 780 */ 781 static int process_finished_round(struct perf_tool *tool, 782 union perf_event *event __used, 783 struct perf_session *session) 784 { 785 flush_sample_queue(session, tool); 786 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp; 787 788 return 0; 789 } 790 791 /* The queue is ordered by time */ 792 static void __queue_event(struct sample_queue *new, struct perf_session *s) 793 { 794 struct ordered_samples *os = &s->ordered_samples; 795 struct sample_queue *sample = os->last_sample; 796 u64 timestamp = new->timestamp; 797 struct list_head *p; 798 799 ++os->nr_samples; 800 os->last_sample = new; 801 802 if (!sample) { 803 list_add(&new->list, &os->samples); 804 os->max_timestamp = timestamp; 805 return; 806 } 807 808 /* 809 * last_sample might point to some random place in the list as it's 810 * the last queued event. We expect that the new event is close to 811 * this. 812 */ 813 if (sample->timestamp <= timestamp) { 814 while (sample->timestamp <= timestamp) { 815 p = sample->list.next; 816 if (p == &os->samples) { 817 list_add_tail(&new->list, &os->samples); 818 os->max_timestamp = timestamp; 819 return; 820 } 821 sample = list_entry(p, struct sample_queue, list); 822 } 823 list_add_tail(&new->list, &sample->list); 824 } else { 825 while (sample->timestamp > timestamp) { 826 p = sample->list.prev; 827 if (p == &os->samples) { 828 list_add(&new->list, &os->samples); 829 return; 830 } 831 sample = list_entry(p, struct sample_queue, list); 832 } 833 list_add(&new->list, &sample->list); 834 } 835 } 836 837 #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue)) 838 839 static int perf_session_queue_event(struct perf_session *s, union perf_event *event, 840 struct perf_sample *sample, u64 file_offset) 841 { 842 struct ordered_samples *os = &s->ordered_samples; 843 struct list_head *sc = &os->sample_cache; 844 u64 timestamp = sample->time; 845 struct sample_queue *new; 846 847 if (!timestamp || timestamp == ~0ULL) 848 return -ETIME; 849 850 if (timestamp < s->ordered_samples.last_flush) { 851 printf("Warning: Timestamp below last timeslice flush\n"); 852 return -EINVAL; 853 } 854 855 if (!list_empty(sc)) { 856 new = list_entry(sc->next, struct sample_queue, list); 857 list_del(&new->list); 858 } else if (os->sample_buffer) { 859 new = os->sample_buffer + os->sample_buffer_idx; 860 if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER) 861 os->sample_buffer = NULL; 862 } else { 863 os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new)); 864 if (!os->sample_buffer) 865 return -ENOMEM; 866 list_add(&os->sample_buffer->list, &os->to_free); 867 os->sample_buffer_idx = 2; 868 new = os->sample_buffer + 1; 869 } 870 871 new->timestamp = timestamp; 872 new->file_offset = file_offset; 873 new->event = event; 874 875 __queue_event(new, s); 876 877 return 0; 878 } 879 880 static void callchain__printf(struct perf_sample *sample) 881 { 882 unsigned int i; 883 884 printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr); 885 886 for (i = 0; i < sample->callchain->nr; i++) 887 printf("..... %2d: %016" PRIx64 "\n", 888 i, sample->callchain->ips[i]); 889 } 890 891 static void branch_stack__printf(struct perf_sample *sample) 892 { 893 uint64_t i; 894 895 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr); 896 897 for (i = 0; i < sample->branch_stack->nr; i++) 898 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n", 899 i, sample->branch_stack->entries[i].from, 900 sample->branch_stack->entries[i].to); 901 } 902 903 static void regs_dump__printf(u64 mask, u64 *regs) 904 { 905 unsigned rid, i = 0; 906 907 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { 908 u64 val = regs[i++]; 909 910 printf(".... %-5s 0x%" PRIx64 "\n", 911 perf_reg_name(rid), val); 912 } 913 } 914 915 static void regs_user__printf(struct perf_sample *sample, u64 mask) 916 { 917 struct regs_dump *user_regs = &sample->user_regs; 918 919 if (user_regs->regs) { 920 printf("... user regs: mask 0x%" PRIx64 "\n", mask); 921 regs_dump__printf(mask, user_regs->regs); 922 } 923 } 924 925 static void stack_user__printf(struct stack_dump *dump) 926 { 927 printf("... ustack: size %" PRIu64 ", offset 0x%x\n", 928 dump->size, dump->offset); 929 } 930 931 static void perf_session__print_tstamp(struct perf_session *session, 932 union perf_event *event, 933 struct perf_sample *sample) 934 { 935 u64 sample_type = perf_evlist__sample_type(session->evlist); 936 937 if (event->header.type != PERF_RECORD_SAMPLE && 938 !perf_evlist__sample_id_all(session->evlist)) { 939 fputs("-1 -1 ", stdout); 940 return; 941 } 942 943 if ((sample_type & PERF_SAMPLE_CPU)) 944 printf("%u ", sample->cpu); 945 946 if (sample_type & PERF_SAMPLE_TIME) 947 printf("%" PRIu64 " ", sample->time); 948 } 949 950 static void dump_event(struct perf_session *session, union perf_event *event, 951 u64 file_offset, struct perf_sample *sample) 952 { 953 if (!dump_trace) 954 return; 955 956 printf("\n%#" PRIx64 " [%#x]: event: %d\n", 957 file_offset, event->header.size, event->header.type); 958 959 trace_event(event); 960 961 if (sample) 962 perf_session__print_tstamp(session, event, sample); 963 964 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 965 event->header.size, perf_event__name(event->header.type)); 966 } 967 968 static void dump_sample(struct perf_evsel *evsel, union perf_event *event, 969 struct perf_sample *sample) 970 { 971 u64 sample_type; 972 973 if (!dump_trace) 974 return; 975 976 printf("(IP, %d): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 977 event->header.misc, sample->pid, sample->tid, sample->ip, 978 sample->period, sample->addr); 979 980 sample_type = evsel->attr.sample_type; 981 982 if (sample_type & PERF_SAMPLE_CALLCHAIN) 983 callchain__printf(sample); 984 985 if (sample_type & PERF_SAMPLE_BRANCH_STACK) 986 branch_stack__printf(sample); 987 988 if (sample_type & PERF_SAMPLE_REGS_USER) 989 regs_user__printf(sample, evsel->attr.sample_regs_user); 990 991 if (sample_type & PERF_SAMPLE_STACK_USER) 992 stack_user__printf(&sample->user_stack); 993 } 994 995 static struct machine * 996 perf_session__find_machine_for_cpumode(struct perf_session *session, 997 union perf_event *event) 998 { 999 const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 1000 1001 if (perf_guest && 1002 ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 1003 (cpumode == PERF_RECORD_MISC_GUEST_USER))) { 1004 u32 pid; 1005 1006 if (event->header.type == PERF_RECORD_MMAP) 1007 pid = event->mmap.pid; 1008 else 1009 pid = event->ip.pid; 1010 1011 return perf_session__findnew_machine(session, pid); 1012 } 1013 1014 return perf_session__find_host_machine(session); 1015 } 1016 1017 static int perf_session_deliver_event(struct perf_session *session, 1018 union perf_event *event, 1019 struct perf_sample *sample, 1020 struct perf_tool *tool, 1021 u64 file_offset) 1022 { 1023 struct perf_evsel *evsel; 1024 struct machine *machine; 1025 1026 dump_event(session, event, file_offset, sample); 1027 1028 evsel = perf_evlist__id2evsel(session->evlist, sample->id); 1029 if (evsel != NULL && event->header.type != PERF_RECORD_SAMPLE) { 1030 /* 1031 * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here 1032 * because the tools right now may apply filters, discarding 1033 * some of the samples. For consistency, in the future we 1034 * should have something like nr_filtered_samples and remove 1035 * the sample->period from total_sample_period, etc, KISS for 1036 * now tho. 1037 * 1038 * Also testing against NULL allows us to handle files without 1039 * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the 1040 * future probably it'll be a good idea to restrict event 1041 * processing via perf_session to files with both set. 1042 */ 1043 hists__inc_nr_events(&evsel->hists, event->header.type); 1044 } 1045 1046 machine = perf_session__find_machine_for_cpumode(session, event); 1047 1048 switch (event->header.type) { 1049 case PERF_RECORD_SAMPLE: 1050 dump_sample(evsel, event, sample); 1051 if (evsel == NULL) { 1052 ++session->hists.stats.nr_unknown_id; 1053 return 0; 1054 } 1055 if (machine == NULL) { 1056 ++session->hists.stats.nr_unprocessable_samples; 1057 return 0; 1058 } 1059 return tool->sample(tool, event, sample, evsel, machine); 1060 case PERF_RECORD_MMAP: 1061 return tool->mmap(tool, event, sample, machine); 1062 case PERF_RECORD_COMM: 1063 return tool->comm(tool, event, sample, machine); 1064 case PERF_RECORD_FORK: 1065 return tool->fork(tool, event, sample, machine); 1066 case PERF_RECORD_EXIT: 1067 return tool->exit(tool, event, sample, machine); 1068 case PERF_RECORD_LOST: 1069 if (tool->lost == perf_event__process_lost) 1070 session->hists.stats.total_lost += event->lost.lost; 1071 return tool->lost(tool, event, sample, machine); 1072 case PERF_RECORD_READ: 1073 return tool->read(tool, event, sample, evsel, machine); 1074 case PERF_RECORD_THROTTLE: 1075 return tool->throttle(tool, event, sample, machine); 1076 case PERF_RECORD_UNTHROTTLE: 1077 return tool->unthrottle(tool, event, sample, machine); 1078 default: 1079 ++session->hists.stats.nr_unknown_events; 1080 return -1; 1081 } 1082 } 1083 1084 static int perf_session__preprocess_sample(struct perf_session *session, 1085 union perf_event *event, struct perf_sample *sample) 1086 { 1087 if (event->header.type != PERF_RECORD_SAMPLE || 1088 !(perf_evlist__sample_type(session->evlist) & PERF_SAMPLE_CALLCHAIN)) 1089 return 0; 1090 1091 if (!ip_callchain__valid(sample->callchain, event)) { 1092 pr_debug("call-chain problem with event, skipping it.\n"); 1093 ++session->hists.stats.nr_invalid_chains; 1094 session->hists.stats.total_invalid_chains += sample->period; 1095 return -EINVAL; 1096 } 1097 return 0; 1098 } 1099 1100 static int perf_session__process_user_event(struct perf_session *session, union perf_event *event, 1101 struct perf_tool *tool, u64 file_offset) 1102 { 1103 int err; 1104 1105 dump_event(session, event, file_offset, NULL); 1106 1107 /* These events are processed right away */ 1108 switch (event->header.type) { 1109 case PERF_RECORD_HEADER_ATTR: 1110 err = tool->attr(event, &session->evlist); 1111 if (err == 0) 1112 perf_session__set_id_hdr_size(session); 1113 return err; 1114 case PERF_RECORD_HEADER_EVENT_TYPE: 1115 return tool->event_type(tool, event); 1116 case PERF_RECORD_HEADER_TRACING_DATA: 1117 /* setup for reading amidst mmap */ 1118 lseek(session->fd, file_offset, SEEK_SET); 1119 return tool->tracing_data(event, session); 1120 case PERF_RECORD_HEADER_BUILD_ID: 1121 return tool->build_id(tool, event, session); 1122 case PERF_RECORD_FINISHED_ROUND: 1123 return tool->finished_round(tool, event, session); 1124 default: 1125 return -EINVAL; 1126 } 1127 } 1128 1129 static void event_swap(union perf_event *event, bool sample_id_all) 1130 { 1131 perf_event__swap_op swap; 1132 1133 swap = perf_event__swap_ops[event->header.type]; 1134 if (swap) 1135 swap(event, sample_id_all); 1136 } 1137 1138 static int perf_session__process_event(struct perf_session *session, 1139 union perf_event *event, 1140 struct perf_tool *tool, 1141 u64 file_offset) 1142 { 1143 struct perf_sample sample; 1144 int ret; 1145 1146 if (session->header.needs_swap) 1147 event_swap(event, perf_evlist__sample_id_all(session->evlist)); 1148 1149 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1150 return -EINVAL; 1151 1152 hists__inc_nr_events(&session->hists, event->header.type); 1153 1154 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1155 return perf_session__process_user_event(session, event, tool, file_offset); 1156 1157 /* 1158 * For all kernel events we get the sample data 1159 */ 1160 ret = perf_evlist__parse_sample(session->evlist, event, &sample, 1161 session->header.needs_swap); 1162 if (ret) 1163 return ret; 1164 1165 /* Preprocess sample records - precheck callchains */ 1166 if (perf_session__preprocess_sample(session, event, &sample)) 1167 return 0; 1168 1169 if (tool->ordered_samples) { 1170 ret = perf_session_queue_event(session, event, &sample, 1171 file_offset); 1172 if (ret != -ETIME) 1173 return ret; 1174 } 1175 1176 return perf_session_deliver_event(session, event, &sample, tool, 1177 file_offset); 1178 } 1179 1180 void perf_event_header__bswap(struct perf_event_header *self) 1181 { 1182 self->type = bswap_32(self->type); 1183 self->misc = bswap_16(self->misc); 1184 self->size = bswap_16(self->size); 1185 } 1186 1187 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1188 { 1189 return machine__findnew_thread(&session->host_machine, pid); 1190 } 1191 1192 static struct thread *perf_session__register_idle_thread(struct perf_session *self) 1193 { 1194 struct thread *thread = perf_session__findnew(self, 0); 1195 1196 if (thread == NULL || thread__set_comm(thread, "swapper")) { 1197 pr_err("problem inserting idle task.\n"); 1198 thread = NULL; 1199 } 1200 1201 return thread; 1202 } 1203 1204 static void perf_session__warn_about_errors(const struct perf_session *session, 1205 const struct perf_tool *tool) 1206 { 1207 if (tool->lost == perf_event__process_lost && 1208 session->hists.stats.nr_events[PERF_RECORD_LOST] != 0) { 1209 ui__warning("Processed %d events and lost %d chunks!\n\n" 1210 "Check IO/CPU overload!\n\n", 1211 session->hists.stats.nr_events[0], 1212 session->hists.stats.nr_events[PERF_RECORD_LOST]); 1213 } 1214 1215 if (session->hists.stats.nr_unknown_events != 0) { 1216 ui__warning("Found %u unknown events!\n\n" 1217 "Is this an older tool processing a perf.data " 1218 "file generated by a more recent tool?\n\n" 1219 "If that is not the case, consider " 1220 "reporting to linux-kernel@vger.kernel.org.\n\n", 1221 session->hists.stats.nr_unknown_events); 1222 } 1223 1224 if (session->hists.stats.nr_unknown_id != 0) { 1225 ui__warning("%u samples with id not present in the header\n", 1226 session->hists.stats.nr_unknown_id); 1227 } 1228 1229 if (session->hists.stats.nr_invalid_chains != 0) { 1230 ui__warning("Found invalid callchains!\n\n" 1231 "%u out of %u events were discarded for this reason.\n\n" 1232 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1233 session->hists.stats.nr_invalid_chains, 1234 session->hists.stats.nr_events[PERF_RECORD_SAMPLE]); 1235 } 1236 1237 if (session->hists.stats.nr_unprocessable_samples != 0) { 1238 ui__warning("%u unprocessable samples recorded.\n" 1239 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1240 session->hists.stats.nr_unprocessable_samples); 1241 } 1242 } 1243 1244 #define session_done() (*(volatile int *)(&session_done)) 1245 volatile int session_done; 1246 1247 static int __perf_session__process_pipe_events(struct perf_session *self, 1248 struct perf_tool *tool) 1249 { 1250 union perf_event *event; 1251 uint32_t size, cur_size = 0; 1252 void *buf = NULL; 1253 int skip = 0; 1254 u64 head; 1255 int err; 1256 void *p; 1257 1258 perf_tool__fill_defaults(tool); 1259 1260 head = 0; 1261 cur_size = sizeof(union perf_event); 1262 1263 buf = malloc(cur_size); 1264 if (!buf) 1265 return -errno; 1266 more: 1267 event = buf; 1268 err = readn(self->fd, event, sizeof(struct perf_event_header)); 1269 if (err <= 0) { 1270 if (err == 0) 1271 goto done; 1272 1273 pr_err("failed to read event header\n"); 1274 goto out_err; 1275 } 1276 1277 if (self->header.needs_swap) 1278 perf_event_header__bswap(&event->header); 1279 1280 size = event->header.size; 1281 if (size == 0) 1282 size = 8; 1283 1284 if (size > cur_size) { 1285 void *new = realloc(buf, size); 1286 if (!new) { 1287 pr_err("failed to allocate memory to read event\n"); 1288 goto out_err; 1289 } 1290 buf = new; 1291 cur_size = size; 1292 event = buf; 1293 } 1294 p = event; 1295 p += sizeof(struct perf_event_header); 1296 1297 if (size - sizeof(struct perf_event_header)) { 1298 err = readn(self->fd, p, size - sizeof(struct perf_event_header)); 1299 if (err <= 0) { 1300 if (err == 0) { 1301 pr_err("unexpected end of event stream\n"); 1302 goto done; 1303 } 1304 1305 pr_err("failed to read event data\n"); 1306 goto out_err; 1307 } 1308 } 1309 1310 if ((skip = perf_session__process_event(self, event, tool, head)) < 0) { 1311 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1312 head, event->header.size, event->header.type); 1313 err = -EINVAL; 1314 goto out_err; 1315 } 1316 1317 head += size; 1318 1319 if (skip > 0) 1320 head += skip; 1321 1322 if (!session_done()) 1323 goto more; 1324 done: 1325 err = 0; 1326 out_err: 1327 free(buf); 1328 perf_session__warn_about_errors(self, tool); 1329 perf_session_free_sample_buffers(self); 1330 return err; 1331 } 1332 1333 static union perf_event * 1334 fetch_mmaped_event(struct perf_session *session, 1335 u64 head, size_t mmap_size, char *buf) 1336 { 1337 union perf_event *event; 1338 1339 /* 1340 * Ensure we have enough space remaining to read 1341 * the size of the event in the headers. 1342 */ 1343 if (head + sizeof(event->header) > mmap_size) 1344 return NULL; 1345 1346 event = (union perf_event *)(buf + head); 1347 1348 if (session->header.needs_swap) 1349 perf_event_header__bswap(&event->header); 1350 1351 if (head + event->header.size > mmap_size) 1352 return NULL; 1353 1354 return event; 1355 } 1356 1357 int __perf_session__process_events(struct perf_session *session, 1358 u64 data_offset, u64 data_size, 1359 u64 file_size, struct perf_tool *tool) 1360 { 1361 u64 head, page_offset, file_offset, file_pos, progress_next; 1362 int err, mmap_prot, mmap_flags, map_idx = 0; 1363 size_t page_size, mmap_size; 1364 char *buf, *mmaps[8]; 1365 union perf_event *event; 1366 uint32_t size; 1367 1368 perf_tool__fill_defaults(tool); 1369 1370 page_size = sysconf(_SC_PAGESIZE); 1371 1372 page_offset = page_size * (data_offset / page_size); 1373 file_offset = page_offset; 1374 head = data_offset - page_offset; 1375 1376 if (data_offset + data_size < file_size) 1377 file_size = data_offset + data_size; 1378 1379 progress_next = file_size / 16; 1380 1381 mmap_size = session->mmap_window; 1382 if (mmap_size > file_size) 1383 mmap_size = file_size; 1384 1385 memset(mmaps, 0, sizeof(mmaps)); 1386 1387 mmap_prot = PROT_READ; 1388 mmap_flags = MAP_SHARED; 1389 1390 if (session->header.needs_swap) { 1391 mmap_prot |= PROT_WRITE; 1392 mmap_flags = MAP_PRIVATE; 1393 } 1394 remap: 1395 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, session->fd, 1396 file_offset); 1397 if (buf == MAP_FAILED) { 1398 pr_err("failed to mmap file\n"); 1399 err = -errno; 1400 goto out_err; 1401 } 1402 mmaps[map_idx] = buf; 1403 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 1404 file_pos = file_offset + head; 1405 1406 more: 1407 event = fetch_mmaped_event(session, head, mmap_size, buf); 1408 if (!event) { 1409 if (mmaps[map_idx]) { 1410 munmap(mmaps[map_idx], mmap_size); 1411 mmaps[map_idx] = NULL; 1412 } 1413 1414 page_offset = page_size * (head / page_size); 1415 file_offset += page_offset; 1416 head -= page_offset; 1417 goto remap; 1418 } 1419 1420 size = event->header.size; 1421 1422 if (size == 0 || 1423 perf_session__process_event(session, event, tool, file_pos) < 0) { 1424 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1425 file_offset + head, event->header.size, 1426 event->header.type); 1427 err = -EINVAL; 1428 goto out_err; 1429 } 1430 1431 head += size; 1432 file_pos += size; 1433 1434 if (file_pos >= progress_next) { 1435 progress_next += file_size / 16; 1436 ui_progress__update(file_pos, file_size, 1437 "Processing events..."); 1438 } 1439 1440 if (file_pos < file_size) 1441 goto more; 1442 1443 err = 0; 1444 /* do the final flush for ordered samples */ 1445 session->ordered_samples.next_flush = ULLONG_MAX; 1446 flush_sample_queue(session, tool); 1447 out_err: 1448 perf_session__warn_about_errors(session, tool); 1449 perf_session_free_sample_buffers(session); 1450 return err; 1451 } 1452 1453 int perf_session__process_events(struct perf_session *self, 1454 struct perf_tool *tool) 1455 { 1456 int err; 1457 1458 if (perf_session__register_idle_thread(self) == NULL) 1459 return -ENOMEM; 1460 1461 if (!self->fd_pipe) 1462 err = __perf_session__process_events(self, 1463 self->header.data_offset, 1464 self->header.data_size, 1465 self->size, tool); 1466 else 1467 err = __perf_session__process_pipe_events(self, tool); 1468 1469 return err; 1470 } 1471 1472 bool perf_session__has_traces(struct perf_session *session, const char *msg) 1473 { 1474 if (!(perf_evlist__sample_type(session->evlist) & PERF_SAMPLE_RAW)) { 1475 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 1476 return false; 1477 } 1478 1479 return true; 1480 } 1481 1482 int maps__set_kallsyms_ref_reloc_sym(struct map **maps, 1483 const char *symbol_name, u64 addr) 1484 { 1485 char *bracket; 1486 enum map_type i; 1487 struct ref_reloc_sym *ref; 1488 1489 ref = zalloc(sizeof(struct ref_reloc_sym)); 1490 if (ref == NULL) 1491 return -ENOMEM; 1492 1493 ref->name = strdup(symbol_name); 1494 if (ref->name == NULL) { 1495 free(ref); 1496 return -ENOMEM; 1497 } 1498 1499 bracket = strchr(ref->name, ']'); 1500 if (bracket) 1501 *bracket = '\0'; 1502 1503 ref->addr = addr; 1504 1505 for (i = 0; i < MAP__NR_TYPES; ++i) { 1506 struct kmap *kmap = map__kmap(maps[i]); 1507 kmap->ref_reloc_sym = ref; 1508 } 1509 1510 return 0; 1511 } 1512 1513 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp) 1514 { 1515 return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) + 1516 __dsos__fprintf(&self->host_machine.user_dsos, fp) + 1517 machines__fprintf_dsos(&self->machines, fp); 1518 } 1519 1520 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp, 1521 bool with_hits) 1522 { 1523 size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, with_hits); 1524 return ret + machines__fprintf_dsos_buildid(&self->machines, fp, with_hits); 1525 } 1526 1527 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 1528 { 1529 struct perf_evsel *pos; 1530 size_t ret = fprintf(fp, "Aggregated stats:\n"); 1531 1532 ret += hists__fprintf_nr_events(&session->hists, fp); 1533 1534 list_for_each_entry(pos, &session->evlist->entries, node) { 1535 ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos)); 1536 ret += hists__fprintf_nr_events(&pos->hists, fp); 1537 } 1538 1539 return ret; 1540 } 1541 1542 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 1543 { 1544 /* 1545 * FIXME: Here we have to actually print all the machines in this 1546 * session, not just the host... 1547 */ 1548 return machine__fprintf(&session->host_machine, fp); 1549 } 1550 1551 void perf_session__remove_thread(struct perf_session *session, 1552 struct thread *th) 1553 { 1554 /* 1555 * FIXME: This one makes no sense, we need to remove the thread from 1556 * the machine it belongs to, perf_session can have many machines, so 1557 * doing it always on ->host_machine is wrong. Fix when auditing all 1558 * the 'perf kvm' code. 1559 */ 1560 machine__remove_thread(&session->host_machine, th); 1561 } 1562 1563 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, 1564 unsigned int type) 1565 { 1566 struct perf_evsel *pos; 1567 1568 list_for_each_entry(pos, &session->evlist->entries, node) { 1569 if (pos->attr.type == type) 1570 return pos; 1571 } 1572 return NULL; 1573 } 1574 1575 void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event, 1576 struct perf_sample *sample, struct machine *machine, 1577 int print_sym, int print_dso, int print_symoffset) 1578 { 1579 struct addr_location al; 1580 struct callchain_cursor_node *node; 1581 1582 if (perf_event__preprocess_sample(event, machine, &al, sample, 1583 NULL) < 0) { 1584 error("problem processing %d event, skipping it.\n", 1585 event->header.type); 1586 return; 1587 } 1588 1589 if (symbol_conf.use_callchain && sample->callchain) { 1590 1591 1592 if (machine__resolve_callchain(machine, evsel, al.thread, 1593 sample, NULL) != 0) { 1594 if (verbose) 1595 error("Failed to resolve callchain. Skipping\n"); 1596 return; 1597 } 1598 callchain_cursor_commit(&callchain_cursor); 1599 1600 while (1) { 1601 node = callchain_cursor_current(&callchain_cursor); 1602 if (!node) 1603 break; 1604 1605 printf("\t%16" PRIx64, node->ip); 1606 if (print_sym) { 1607 printf(" "); 1608 symbol__fprintf_symname(node->sym, stdout); 1609 } 1610 if (print_dso) { 1611 printf(" ("); 1612 map__fprintf_dsoname(node->map, stdout); 1613 printf(")"); 1614 } 1615 printf("\n"); 1616 1617 callchain_cursor_advance(&callchain_cursor); 1618 } 1619 1620 } else { 1621 printf("%16" PRIx64, sample->ip); 1622 if (print_sym) { 1623 printf(" "); 1624 if (print_symoffset) 1625 symbol__fprintf_symname_offs(al.sym, &al, 1626 stdout); 1627 else 1628 symbol__fprintf_symname(al.sym, stdout); 1629 } 1630 1631 if (print_dso) { 1632 printf(" ("); 1633 map__fprintf_dsoname(al.map, stdout); 1634 printf(")"); 1635 } 1636 } 1637 } 1638 1639 int perf_session__cpu_bitmap(struct perf_session *session, 1640 const char *cpu_list, unsigned long *cpu_bitmap) 1641 { 1642 int i; 1643 struct cpu_map *map; 1644 1645 for (i = 0; i < PERF_TYPE_MAX; ++i) { 1646 struct perf_evsel *evsel; 1647 1648 evsel = perf_session__find_first_evtype(session, i); 1649 if (!evsel) 1650 continue; 1651 1652 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) { 1653 pr_err("File does not contain CPU events. " 1654 "Remove -c option to proceed.\n"); 1655 return -1; 1656 } 1657 } 1658 1659 map = cpu_map__new(cpu_list); 1660 if (map == NULL) { 1661 pr_err("Invalid cpu_list\n"); 1662 return -1; 1663 } 1664 1665 for (i = 0; i < map->nr; i++) { 1666 int cpu = map->map[i]; 1667 1668 if (cpu >= MAX_NR_CPUS) { 1669 pr_err("Requested CPU %d too large. " 1670 "Consider raising MAX_NR_CPUS\n", cpu); 1671 return -1; 1672 } 1673 1674 set_bit(cpu, cpu_bitmap); 1675 } 1676 1677 return 0; 1678 } 1679 1680 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 1681 bool full) 1682 { 1683 struct stat st; 1684 int ret; 1685 1686 if (session == NULL || fp == NULL) 1687 return; 1688 1689 ret = fstat(session->fd, &st); 1690 if (ret == -1) 1691 return; 1692 1693 fprintf(fp, "# ========\n"); 1694 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime)); 1695 perf_header__fprintf_info(session, fp, full); 1696 fprintf(fp, "# ========\n#\n"); 1697 } 1698 1699 1700 int __perf_session__set_tracepoints_handlers(struct perf_session *session, 1701 const struct perf_evsel_str_handler *assocs, 1702 size_t nr_assocs) 1703 { 1704 struct perf_evlist *evlist = session->evlist; 1705 struct event_format *format; 1706 struct perf_evsel *evsel; 1707 char *tracepoint, *name; 1708 size_t i; 1709 int err; 1710 1711 for (i = 0; i < nr_assocs; i++) { 1712 err = -ENOMEM; 1713 tracepoint = strdup(assocs[i].name); 1714 if (tracepoint == NULL) 1715 goto out; 1716 1717 err = -ENOENT; 1718 name = strchr(tracepoint, ':'); 1719 if (name == NULL) 1720 goto out_free; 1721 1722 *name++ = '\0'; 1723 format = pevent_find_event_by_name(session->pevent, 1724 tracepoint, name); 1725 if (format == NULL) { 1726 /* 1727 * Adding a handler for an event not in the session, 1728 * just ignore it. 1729 */ 1730 goto next; 1731 } 1732 1733 evsel = perf_evlist__find_tracepoint_by_id(evlist, format->id); 1734 if (evsel == NULL) 1735 goto next; 1736 1737 err = -EEXIST; 1738 if (evsel->handler.func != NULL) 1739 goto out_free; 1740 evsel->handler.func = assocs[i].handler; 1741 next: 1742 free(tracepoint); 1743 } 1744 1745 err = 0; 1746 out: 1747 return err; 1748 1749 out_free: 1750 free(tracepoint); 1751 goto out; 1752 } 1753