1 // SPDX-License-Identifier: GPL-2.0 2 #include <errno.h> 3 #include <inttypes.h> 4 #include <linux/err.h> 5 #include <linux/kernel.h> 6 #include <linux/zalloc.h> 7 #include <api/fs/fs.h> 8 9 #include <byteswap.h> 10 #include <unistd.h> 11 #include <sys/types.h> 12 #include <sys/mman.h> 13 #include <perf/cpumap.h> 14 15 #include "map_symbol.h" 16 #include "branch.h" 17 #include "debug.h" 18 #include "evlist.h" 19 #include "evsel.h" 20 #include "memswap.h" 21 #include "map.h" 22 #include "symbol.h" 23 #include "session.h" 24 #include "tool.h" 25 #include "perf_regs.h" 26 #include "asm/bug.h" 27 #include "auxtrace.h" 28 #include "thread.h" 29 #include "thread-stack.h" 30 #include "sample-raw.h" 31 #include "stat.h" 32 #include "ui/progress.h" 33 #include "../perf.h" 34 #include "arch/common.h" 35 #include <internal/lib.h> 36 37 #ifdef HAVE_ZSTD_SUPPORT 38 static int perf_session__process_compressed_event(struct perf_session *session, 39 union perf_event *event, u64 file_offset) 40 { 41 void *src; 42 size_t decomp_size, src_size; 43 u64 decomp_last_rem = 0; 44 size_t mmap_len, decomp_len = session->header.env.comp_mmap_len; 45 struct decomp *decomp, *decomp_last = session->decomp_last; 46 47 if (decomp_last) { 48 decomp_last_rem = decomp_last->size - decomp_last->head; 49 decomp_len += decomp_last_rem; 50 } 51 52 mmap_len = sizeof(struct decomp) + decomp_len; 53 decomp = mmap(NULL, mmap_len, PROT_READ|PROT_WRITE, 54 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); 55 if (decomp == MAP_FAILED) { 56 pr_err("Couldn't allocate memory for decompression\n"); 57 return -1; 58 } 59 60 decomp->file_pos = file_offset; 61 decomp->mmap_len = mmap_len; 62 decomp->head = 0; 63 64 if (decomp_last_rem) { 65 memcpy(decomp->data, &(decomp_last->data[decomp_last->head]), decomp_last_rem); 66 decomp->size = decomp_last_rem; 67 } 68 69 src = (void *)event + sizeof(struct perf_record_compressed); 70 src_size = event->pack.header.size - sizeof(struct perf_record_compressed); 71 72 decomp_size = zstd_decompress_stream(&(session->zstd_data), src, src_size, 73 &(decomp->data[decomp_last_rem]), decomp_len - decomp_last_rem); 74 if (!decomp_size) { 75 munmap(decomp, mmap_len); 76 pr_err("Couldn't decompress data\n"); 77 return -1; 78 } 79 80 decomp->size += decomp_size; 81 82 if (session->decomp == NULL) { 83 session->decomp = decomp; 84 session->decomp_last = decomp; 85 } else { 86 session->decomp_last->next = decomp; 87 session->decomp_last = decomp; 88 } 89 90 pr_debug("decomp (B): %ld to %ld\n", src_size, decomp_size); 91 92 return 0; 93 } 94 #else /* !HAVE_ZSTD_SUPPORT */ 95 #define perf_session__process_compressed_event perf_session__process_compressed_event_stub 96 #endif 97 98 static int perf_session__deliver_event(struct perf_session *session, 99 union perf_event *event, 100 struct perf_tool *tool, 101 u64 file_offset); 102 103 static int perf_session__open(struct perf_session *session) 104 { 105 struct perf_data *data = session->data; 106 107 if (perf_session__read_header(session) < 0) { 108 pr_err("incompatible file format (rerun with -v to learn more)\n"); 109 return -1; 110 } 111 112 if (perf_data__is_pipe(data)) 113 return 0; 114 115 if (perf_header__has_feat(&session->header, HEADER_STAT)) 116 return 0; 117 118 if (!perf_evlist__valid_sample_type(session->evlist)) { 119 pr_err("non matching sample_type\n"); 120 return -1; 121 } 122 123 if (!perf_evlist__valid_sample_id_all(session->evlist)) { 124 pr_err("non matching sample_id_all\n"); 125 return -1; 126 } 127 128 if (!perf_evlist__valid_read_format(session->evlist)) { 129 pr_err("non matching read_format\n"); 130 return -1; 131 } 132 133 return 0; 134 } 135 136 void perf_session__set_id_hdr_size(struct perf_session *session) 137 { 138 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist); 139 140 machines__set_id_hdr_size(&session->machines, id_hdr_size); 141 } 142 143 int perf_session__create_kernel_maps(struct perf_session *session) 144 { 145 int ret = machine__create_kernel_maps(&session->machines.host); 146 147 if (ret >= 0) 148 ret = machines__create_guest_kernel_maps(&session->machines); 149 return ret; 150 } 151 152 static void perf_session__destroy_kernel_maps(struct perf_session *session) 153 { 154 machines__destroy_kernel_maps(&session->machines); 155 } 156 157 static bool perf_session__has_comm_exec(struct perf_session *session) 158 { 159 struct evsel *evsel; 160 161 evlist__for_each_entry(session->evlist, evsel) { 162 if (evsel->core.attr.comm_exec) 163 return true; 164 } 165 166 return false; 167 } 168 169 static void perf_session__set_comm_exec(struct perf_session *session) 170 { 171 bool comm_exec = perf_session__has_comm_exec(session); 172 173 machines__set_comm_exec(&session->machines, comm_exec); 174 } 175 176 static int ordered_events__deliver_event(struct ordered_events *oe, 177 struct ordered_event *event) 178 { 179 struct perf_session *session = container_of(oe, struct perf_session, 180 ordered_events); 181 182 return perf_session__deliver_event(session, event->event, 183 session->tool, event->file_offset); 184 } 185 186 struct perf_session *perf_session__new(struct perf_data *data, 187 bool repipe, struct perf_tool *tool) 188 { 189 int ret = -ENOMEM; 190 struct perf_session *session = zalloc(sizeof(*session)); 191 192 if (!session) 193 goto out; 194 195 session->repipe = repipe; 196 session->tool = tool; 197 INIT_LIST_HEAD(&session->auxtrace_index); 198 machines__init(&session->machines); 199 ordered_events__init(&session->ordered_events, 200 ordered_events__deliver_event, NULL); 201 202 perf_env__init(&session->header.env); 203 if (data) { 204 ret = perf_data__open(data); 205 if (ret < 0) 206 goto out_delete; 207 208 session->data = data; 209 210 if (perf_data__is_read(data)) { 211 ret = perf_session__open(session); 212 if (ret < 0) 213 goto out_delete; 214 215 /* 216 * set session attributes that are present in perf.data 217 * but not in pipe-mode. 218 */ 219 if (!data->is_pipe) { 220 perf_session__set_id_hdr_size(session); 221 perf_session__set_comm_exec(session); 222 } 223 224 perf_evlist__init_trace_event_sample_raw(session->evlist); 225 226 /* Open the directory data. */ 227 if (data->is_dir) { 228 ret = perf_data__open_dir(data); 229 if (ret) 230 goto out_delete; 231 } 232 233 if (!symbol_conf.kallsyms_name && 234 !symbol_conf.vmlinux_name) 235 symbol_conf.kallsyms_name = perf_data__kallsyms_name(data); 236 } 237 } else { 238 session->machines.host.env = &perf_env; 239 } 240 241 session->machines.host.single_address_space = 242 perf_env__single_address_space(session->machines.host.env); 243 244 if (!data || perf_data__is_write(data)) { 245 /* 246 * In O_RDONLY mode this will be performed when reading the 247 * kernel MMAP event, in perf_event__process_mmap(). 248 */ 249 if (perf_session__create_kernel_maps(session) < 0) 250 pr_warning("Cannot read kernel map\n"); 251 } 252 253 /* 254 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is 255 * processed, so perf_evlist__sample_id_all is not meaningful here. 256 */ 257 if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps && 258 tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) { 259 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); 260 tool->ordered_events = false; 261 } 262 263 return session; 264 265 out_delete: 266 perf_session__delete(session); 267 out: 268 return ERR_PTR(ret); 269 } 270 271 static void perf_session__delete_threads(struct perf_session *session) 272 { 273 machine__delete_threads(&session->machines.host); 274 } 275 276 static void perf_session__release_decomp_events(struct perf_session *session) 277 { 278 struct decomp *next, *decomp; 279 size_t mmap_len; 280 next = session->decomp; 281 do { 282 decomp = next; 283 if (decomp == NULL) 284 break; 285 next = decomp->next; 286 mmap_len = decomp->mmap_len; 287 munmap(decomp, mmap_len); 288 } while (1); 289 } 290 291 void perf_session__delete(struct perf_session *session) 292 { 293 if (session == NULL) 294 return; 295 auxtrace__free(session); 296 auxtrace_index__free(&session->auxtrace_index); 297 perf_session__destroy_kernel_maps(session); 298 perf_session__delete_threads(session); 299 perf_session__release_decomp_events(session); 300 perf_env__exit(&session->header.env); 301 machines__exit(&session->machines); 302 if (session->data) 303 perf_data__close(session->data); 304 free(session); 305 } 306 307 static int process_event_synth_tracing_data_stub(struct perf_session *session 308 __maybe_unused, 309 union perf_event *event 310 __maybe_unused) 311 { 312 dump_printf(": unhandled!\n"); 313 return 0; 314 } 315 316 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused, 317 union perf_event *event __maybe_unused, 318 struct evlist **pevlist 319 __maybe_unused) 320 { 321 dump_printf(": unhandled!\n"); 322 return 0; 323 } 324 325 static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused, 326 union perf_event *event __maybe_unused, 327 struct evlist **pevlist 328 __maybe_unused) 329 { 330 if (dump_trace) 331 perf_event__fprintf_event_update(event, stdout); 332 333 dump_printf(": unhandled!\n"); 334 return 0; 335 } 336 337 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused, 338 union perf_event *event __maybe_unused, 339 struct perf_sample *sample __maybe_unused, 340 struct evsel *evsel __maybe_unused, 341 struct machine *machine __maybe_unused) 342 { 343 dump_printf(": unhandled!\n"); 344 return 0; 345 } 346 347 static int process_event_stub(struct perf_tool *tool __maybe_unused, 348 union perf_event *event __maybe_unused, 349 struct perf_sample *sample __maybe_unused, 350 struct machine *machine __maybe_unused) 351 { 352 dump_printf(": unhandled!\n"); 353 return 0; 354 } 355 356 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused, 357 union perf_event *event __maybe_unused, 358 struct ordered_events *oe __maybe_unused) 359 { 360 dump_printf(": unhandled!\n"); 361 return 0; 362 } 363 364 static int process_finished_round(struct perf_tool *tool, 365 union perf_event *event, 366 struct ordered_events *oe); 367 368 static int skipn(int fd, off_t n) 369 { 370 char buf[4096]; 371 ssize_t ret; 372 373 while (n > 0) { 374 ret = read(fd, buf, min(n, (off_t)sizeof(buf))); 375 if (ret <= 0) 376 return ret; 377 n -= ret; 378 } 379 380 return 0; 381 } 382 383 static s64 process_event_auxtrace_stub(struct perf_session *session __maybe_unused, 384 union perf_event *event) 385 { 386 dump_printf(": unhandled!\n"); 387 if (perf_data__is_pipe(session->data)) 388 skipn(perf_data__fd(session->data), event->auxtrace.size); 389 return event->auxtrace.size; 390 } 391 392 static int process_event_op2_stub(struct perf_session *session __maybe_unused, 393 union perf_event *event __maybe_unused) 394 { 395 dump_printf(": unhandled!\n"); 396 return 0; 397 } 398 399 400 static 401 int process_event_thread_map_stub(struct perf_session *session __maybe_unused, 402 union perf_event *event __maybe_unused) 403 { 404 if (dump_trace) 405 perf_event__fprintf_thread_map(event, stdout); 406 407 dump_printf(": unhandled!\n"); 408 return 0; 409 } 410 411 static 412 int process_event_cpu_map_stub(struct perf_session *session __maybe_unused, 413 union perf_event *event __maybe_unused) 414 { 415 if (dump_trace) 416 perf_event__fprintf_cpu_map(event, stdout); 417 418 dump_printf(": unhandled!\n"); 419 return 0; 420 } 421 422 static 423 int process_event_stat_config_stub(struct perf_session *session __maybe_unused, 424 union perf_event *event __maybe_unused) 425 { 426 if (dump_trace) 427 perf_event__fprintf_stat_config(event, stdout); 428 429 dump_printf(": unhandled!\n"); 430 return 0; 431 } 432 433 static int process_stat_stub(struct perf_session *perf_session __maybe_unused, 434 union perf_event *event) 435 { 436 if (dump_trace) 437 perf_event__fprintf_stat(event, stdout); 438 439 dump_printf(": unhandled!\n"); 440 return 0; 441 } 442 443 static int process_stat_round_stub(struct perf_session *perf_session __maybe_unused, 444 union perf_event *event) 445 { 446 if (dump_trace) 447 perf_event__fprintf_stat_round(event, stdout); 448 449 dump_printf(": unhandled!\n"); 450 return 0; 451 } 452 453 static int perf_session__process_compressed_event_stub(struct perf_session *session __maybe_unused, 454 union perf_event *event __maybe_unused, 455 u64 file_offset __maybe_unused) 456 { 457 dump_printf(": unhandled!\n"); 458 return 0; 459 } 460 461 void perf_tool__fill_defaults(struct perf_tool *tool) 462 { 463 if (tool->sample == NULL) 464 tool->sample = process_event_sample_stub; 465 if (tool->mmap == NULL) 466 tool->mmap = process_event_stub; 467 if (tool->mmap2 == NULL) 468 tool->mmap2 = process_event_stub; 469 if (tool->comm == NULL) 470 tool->comm = process_event_stub; 471 if (tool->namespaces == NULL) 472 tool->namespaces = process_event_stub; 473 if (tool->cgroup == NULL) 474 tool->cgroup = process_event_stub; 475 if (tool->fork == NULL) 476 tool->fork = process_event_stub; 477 if (tool->exit == NULL) 478 tool->exit = process_event_stub; 479 if (tool->lost == NULL) 480 tool->lost = perf_event__process_lost; 481 if (tool->lost_samples == NULL) 482 tool->lost_samples = perf_event__process_lost_samples; 483 if (tool->aux == NULL) 484 tool->aux = perf_event__process_aux; 485 if (tool->itrace_start == NULL) 486 tool->itrace_start = perf_event__process_itrace_start; 487 if (tool->context_switch == NULL) 488 tool->context_switch = perf_event__process_switch; 489 if (tool->ksymbol == NULL) 490 tool->ksymbol = perf_event__process_ksymbol; 491 if (tool->bpf == NULL) 492 tool->bpf = perf_event__process_bpf; 493 if (tool->read == NULL) 494 tool->read = process_event_sample_stub; 495 if (tool->throttle == NULL) 496 tool->throttle = process_event_stub; 497 if (tool->unthrottle == NULL) 498 tool->unthrottle = process_event_stub; 499 if (tool->attr == NULL) 500 tool->attr = process_event_synth_attr_stub; 501 if (tool->event_update == NULL) 502 tool->event_update = process_event_synth_event_update_stub; 503 if (tool->tracing_data == NULL) 504 tool->tracing_data = process_event_synth_tracing_data_stub; 505 if (tool->build_id == NULL) 506 tool->build_id = process_event_op2_stub; 507 if (tool->finished_round == NULL) { 508 if (tool->ordered_events) 509 tool->finished_round = process_finished_round; 510 else 511 tool->finished_round = process_finished_round_stub; 512 } 513 if (tool->id_index == NULL) 514 tool->id_index = process_event_op2_stub; 515 if (tool->auxtrace_info == NULL) 516 tool->auxtrace_info = process_event_op2_stub; 517 if (tool->auxtrace == NULL) 518 tool->auxtrace = process_event_auxtrace_stub; 519 if (tool->auxtrace_error == NULL) 520 tool->auxtrace_error = process_event_op2_stub; 521 if (tool->thread_map == NULL) 522 tool->thread_map = process_event_thread_map_stub; 523 if (tool->cpu_map == NULL) 524 tool->cpu_map = process_event_cpu_map_stub; 525 if (tool->stat_config == NULL) 526 tool->stat_config = process_event_stat_config_stub; 527 if (tool->stat == NULL) 528 tool->stat = process_stat_stub; 529 if (tool->stat_round == NULL) 530 tool->stat_round = process_stat_round_stub; 531 if (tool->time_conv == NULL) 532 tool->time_conv = process_event_op2_stub; 533 if (tool->feature == NULL) 534 tool->feature = process_event_op2_stub; 535 if (tool->compressed == NULL) 536 tool->compressed = perf_session__process_compressed_event; 537 } 538 539 static void swap_sample_id_all(union perf_event *event, void *data) 540 { 541 void *end = (void *) event + event->header.size; 542 int size = end - data; 543 544 BUG_ON(size % sizeof(u64)); 545 mem_bswap_64(data, size); 546 } 547 548 static void perf_event__all64_swap(union perf_event *event, 549 bool sample_id_all __maybe_unused) 550 { 551 struct perf_event_header *hdr = &event->header; 552 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 553 } 554 555 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 556 { 557 event->comm.pid = bswap_32(event->comm.pid); 558 event->comm.tid = bswap_32(event->comm.tid); 559 560 if (sample_id_all) { 561 void *data = &event->comm.comm; 562 563 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 564 swap_sample_id_all(event, data); 565 } 566 } 567 568 static void perf_event__mmap_swap(union perf_event *event, 569 bool sample_id_all) 570 { 571 event->mmap.pid = bswap_32(event->mmap.pid); 572 event->mmap.tid = bswap_32(event->mmap.tid); 573 event->mmap.start = bswap_64(event->mmap.start); 574 event->mmap.len = bswap_64(event->mmap.len); 575 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 576 577 if (sample_id_all) { 578 void *data = &event->mmap.filename; 579 580 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 581 swap_sample_id_all(event, data); 582 } 583 } 584 585 static void perf_event__mmap2_swap(union perf_event *event, 586 bool sample_id_all) 587 { 588 event->mmap2.pid = bswap_32(event->mmap2.pid); 589 event->mmap2.tid = bswap_32(event->mmap2.tid); 590 event->mmap2.start = bswap_64(event->mmap2.start); 591 event->mmap2.len = bswap_64(event->mmap2.len); 592 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); 593 event->mmap2.maj = bswap_32(event->mmap2.maj); 594 event->mmap2.min = bswap_32(event->mmap2.min); 595 event->mmap2.ino = bswap_64(event->mmap2.ino); 596 597 if (sample_id_all) { 598 void *data = &event->mmap2.filename; 599 600 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 601 swap_sample_id_all(event, data); 602 } 603 } 604 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 605 { 606 event->fork.pid = bswap_32(event->fork.pid); 607 event->fork.tid = bswap_32(event->fork.tid); 608 event->fork.ppid = bswap_32(event->fork.ppid); 609 event->fork.ptid = bswap_32(event->fork.ptid); 610 event->fork.time = bswap_64(event->fork.time); 611 612 if (sample_id_all) 613 swap_sample_id_all(event, &event->fork + 1); 614 } 615 616 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 617 { 618 event->read.pid = bswap_32(event->read.pid); 619 event->read.tid = bswap_32(event->read.tid); 620 event->read.value = bswap_64(event->read.value); 621 event->read.time_enabled = bswap_64(event->read.time_enabled); 622 event->read.time_running = bswap_64(event->read.time_running); 623 event->read.id = bswap_64(event->read.id); 624 625 if (sample_id_all) 626 swap_sample_id_all(event, &event->read + 1); 627 } 628 629 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all) 630 { 631 event->aux.aux_offset = bswap_64(event->aux.aux_offset); 632 event->aux.aux_size = bswap_64(event->aux.aux_size); 633 event->aux.flags = bswap_64(event->aux.flags); 634 635 if (sample_id_all) 636 swap_sample_id_all(event, &event->aux + 1); 637 } 638 639 static void perf_event__itrace_start_swap(union perf_event *event, 640 bool sample_id_all) 641 { 642 event->itrace_start.pid = bswap_32(event->itrace_start.pid); 643 event->itrace_start.tid = bswap_32(event->itrace_start.tid); 644 645 if (sample_id_all) 646 swap_sample_id_all(event, &event->itrace_start + 1); 647 } 648 649 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all) 650 { 651 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) { 652 event->context_switch.next_prev_pid = 653 bswap_32(event->context_switch.next_prev_pid); 654 event->context_switch.next_prev_tid = 655 bswap_32(event->context_switch.next_prev_tid); 656 } 657 658 if (sample_id_all) 659 swap_sample_id_all(event, &event->context_switch + 1); 660 } 661 662 static void perf_event__throttle_swap(union perf_event *event, 663 bool sample_id_all) 664 { 665 event->throttle.time = bswap_64(event->throttle.time); 666 event->throttle.id = bswap_64(event->throttle.id); 667 event->throttle.stream_id = bswap_64(event->throttle.stream_id); 668 669 if (sample_id_all) 670 swap_sample_id_all(event, &event->throttle + 1); 671 } 672 673 static void perf_event__namespaces_swap(union perf_event *event, 674 bool sample_id_all) 675 { 676 u64 i; 677 678 event->namespaces.pid = bswap_32(event->namespaces.pid); 679 event->namespaces.tid = bswap_32(event->namespaces.tid); 680 event->namespaces.nr_namespaces = bswap_64(event->namespaces.nr_namespaces); 681 682 for (i = 0; i < event->namespaces.nr_namespaces; i++) { 683 struct perf_ns_link_info *ns = &event->namespaces.link_info[i]; 684 685 ns->dev = bswap_64(ns->dev); 686 ns->ino = bswap_64(ns->ino); 687 } 688 689 if (sample_id_all) 690 swap_sample_id_all(event, &event->namespaces.link_info[i]); 691 } 692 693 static u8 revbyte(u8 b) 694 { 695 int rev = (b >> 4) | ((b & 0xf) << 4); 696 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 697 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 698 return (u8) rev; 699 } 700 701 /* 702 * XXX this is hack in attempt to carry flags bitfield 703 * through endian village. ABI says: 704 * 705 * Bit-fields are allocated from right to left (least to most significant) 706 * on little-endian implementations and from left to right (most to least 707 * significant) on big-endian implementations. 708 * 709 * The above seems to be byte specific, so we need to reverse each 710 * byte of the bitfield. 'Internet' also says this might be implementation 711 * specific and we probably need proper fix and carry perf_event_attr 712 * bitfield flags in separate data file FEAT_ section. Thought this seems 713 * to work for now. 714 */ 715 static void swap_bitfield(u8 *p, unsigned len) 716 { 717 unsigned i; 718 719 for (i = 0; i < len; i++) { 720 *p = revbyte(*p); 721 p++; 722 } 723 } 724 725 /* exported for swapping attributes in file header */ 726 void perf_event__attr_swap(struct perf_event_attr *attr) 727 { 728 attr->type = bswap_32(attr->type); 729 attr->size = bswap_32(attr->size); 730 731 #define bswap_safe(f, n) \ 732 (attr->size > (offsetof(struct perf_event_attr, f) + \ 733 sizeof(attr->f) * (n))) 734 #define bswap_field(f, sz) \ 735 do { \ 736 if (bswap_safe(f, 0)) \ 737 attr->f = bswap_##sz(attr->f); \ 738 } while(0) 739 #define bswap_field_16(f) bswap_field(f, 16) 740 #define bswap_field_32(f) bswap_field(f, 32) 741 #define bswap_field_64(f) bswap_field(f, 64) 742 743 bswap_field_64(config); 744 bswap_field_64(sample_period); 745 bswap_field_64(sample_type); 746 bswap_field_64(read_format); 747 bswap_field_32(wakeup_events); 748 bswap_field_32(bp_type); 749 bswap_field_64(bp_addr); 750 bswap_field_64(bp_len); 751 bswap_field_64(branch_sample_type); 752 bswap_field_64(sample_regs_user); 753 bswap_field_32(sample_stack_user); 754 bswap_field_32(aux_watermark); 755 bswap_field_16(sample_max_stack); 756 bswap_field_32(aux_sample_size); 757 758 /* 759 * After read_format are bitfields. Check read_format because 760 * we are unable to use offsetof on bitfield. 761 */ 762 if (bswap_safe(read_format, 1)) 763 swap_bitfield((u8 *) (&attr->read_format + 1), 764 sizeof(u64)); 765 #undef bswap_field_64 766 #undef bswap_field_32 767 #undef bswap_field 768 #undef bswap_safe 769 } 770 771 static void perf_event__hdr_attr_swap(union perf_event *event, 772 bool sample_id_all __maybe_unused) 773 { 774 size_t size; 775 776 perf_event__attr_swap(&event->attr.attr); 777 778 size = event->header.size; 779 size -= (void *)&event->attr.id - (void *)event; 780 mem_bswap_64(event->attr.id, size); 781 } 782 783 static void perf_event__event_update_swap(union perf_event *event, 784 bool sample_id_all __maybe_unused) 785 { 786 event->event_update.type = bswap_64(event->event_update.type); 787 event->event_update.id = bswap_64(event->event_update.id); 788 } 789 790 static void perf_event__event_type_swap(union perf_event *event, 791 bool sample_id_all __maybe_unused) 792 { 793 event->event_type.event_type.event_id = 794 bswap_64(event->event_type.event_type.event_id); 795 } 796 797 static void perf_event__tracing_data_swap(union perf_event *event, 798 bool sample_id_all __maybe_unused) 799 { 800 event->tracing_data.size = bswap_32(event->tracing_data.size); 801 } 802 803 static void perf_event__auxtrace_info_swap(union perf_event *event, 804 bool sample_id_all __maybe_unused) 805 { 806 size_t size; 807 808 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type); 809 810 size = event->header.size; 811 size -= (void *)&event->auxtrace_info.priv - (void *)event; 812 mem_bswap_64(event->auxtrace_info.priv, size); 813 } 814 815 static void perf_event__auxtrace_swap(union perf_event *event, 816 bool sample_id_all __maybe_unused) 817 { 818 event->auxtrace.size = bswap_64(event->auxtrace.size); 819 event->auxtrace.offset = bswap_64(event->auxtrace.offset); 820 event->auxtrace.reference = bswap_64(event->auxtrace.reference); 821 event->auxtrace.idx = bswap_32(event->auxtrace.idx); 822 event->auxtrace.tid = bswap_32(event->auxtrace.tid); 823 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu); 824 } 825 826 static void perf_event__auxtrace_error_swap(union perf_event *event, 827 bool sample_id_all __maybe_unused) 828 { 829 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type); 830 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code); 831 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu); 832 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid); 833 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid); 834 event->auxtrace_error.fmt = bswap_32(event->auxtrace_error.fmt); 835 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip); 836 if (event->auxtrace_error.fmt) 837 event->auxtrace_error.time = bswap_64(event->auxtrace_error.time); 838 } 839 840 static void perf_event__thread_map_swap(union perf_event *event, 841 bool sample_id_all __maybe_unused) 842 { 843 unsigned i; 844 845 event->thread_map.nr = bswap_64(event->thread_map.nr); 846 847 for (i = 0; i < event->thread_map.nr; i++) 848 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid); 849 } 850 851 static void perf_event__cpu_map_swap(union perf_event *event, 852 bool sample_id_all __maybe_unused) 853 { 854 struct perf_record_cpu_map_data *data = &event->cpu_map.data; 855 struct cpu_map_entries *cpus; 856 struct perf_record_record_cpu_map *mask; 857 unsigned i; 858 859 data->type = bswap_64(data->type); 860 861 switch (data->type) { 862 case PERF_CPU_MAP__CPUS: 863 cpus = (struct cpu_map_entries *)data->data; 864 865 cpus->nr = bswap_16(cpus->nr); 866 867 for (i = 0; i < cpus->nr; i++) 868 cpus->cpu[i] = bswap_16(cpus->cpu[i]); 869 break; 870 case PERF_CPU_MAP__MASK: 871 mask = (struct perf_record_record_cpu_map *)data->data; 872 873 mask->nr = bswap_16(mask->nr); 874 mask->long_size = bswap_16(mask->long_size); 875 876 switch (mask->long_size) { 877 case 4: mem_bswap_32(&mask->mask, mask->nr); break; 878 case 8: mem_bswap_64(&mask->mask, mask->nr); break; 879 default: 880 pr_err("cpu_map swap: unsupported long size\n"); 881 } 882 default: 883 break; 884 } 885 } 886 887 static void perf_event__stat_config_swap(union perf_event *event, 888 bool sample_id_all __maybe_unused) 889 { 890 u64 size; 891 892 size = event->stat_config.nr * sizeof(event->stat_config.data[0]); 893 size += 1; /* nr item itself */ 894 mem_bswap_64(&event->stat_config.nr, size); 895 } 896 897 static void perf_event__stat_swap(union perf_event *event, 898 bool sample_id_all __maybe_unused) 899 { 900 event->stat.id = bswap_64(event->stat.id); 901 event->stat.thread = bswap_32(event->stat.thread); 902 event->stat.cpu = bswap_32(event->stat.cpu); 903 event->stat.val = bswap_64(event->stat.val); 904 event->stat.ena = bswap_64(event->stat.ena); 905 event->stat.run = bswap_64(event->stat.run); 906 } 907 908 static void perf_event__stat_round_swap(union perf_event *event, 909 bool sample_id_all __maybe_unused) 910 { 911 event->stat_round.type = bswap_64(event->stat_round.type); 912 event->stat_round.time = bswap_64(event->stat_round.time); 913 } 914 915 typedef void (*perf_event__swap_op)(union perf_event *event, 916 bool sample_id_all); 917 918 static perf_event__swap_op perf_event__swap_ops[] = { 919 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 920 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap, 921 [PERF_RECORD_COMM] = perf_event__comm_swap, 922 [PERF_RECORD_FORK] = perf_event__task_swap, 923 [PERF_RECORD_EXIT] = perf_event__task_swap, 924 [PERF_RECORD_LOST] = perf_event__all64_swap, 925 [PERF_RECORD_READ] = perf_event__read_swap, 926 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap, 927 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap, 928 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 929 [PERF_RECORD_AUX] = perf_event__aux_swap, 930 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap, 931 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap, 932 [PERF_RECORD_SWITCH] = perf_event__switch_swap, 933 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap, 934 [PERF_RECORD_NAMESPACES] = perf_event__namespaces_swap, 935 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 936 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 937 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 938 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 939 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap, 940 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap, 941 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap, 942 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap, 943 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap, 944 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap, 945 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap, 946 [PERF_RECORD_STAT] = perf_event__stat_swap, 947 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap, 948 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap, 949 [PERF_RECORD_TIME_CONV] = perf_event__all64_swap, 950 [PERF_RECORD_HEADER_MAX] = NULL, 951 }; 952 953 /* 954 * When perf record finishes a pass on every buffers, it records this pseudo 955 * event. 956 * We record the max timestamp t found in the pass n. 957 * Assuming these timestamps are monotonic across cpus, we know that if 958 * a buffer still has events with timestamps below t, they will be all 959 * available and then read in the pass n + 1. 960 * Hence when we start to read the pass n + 2, we can safely flush every 961 * events with timestamps below t. 962 * 963 * ============ PASS n ================= 964 * CPU 0 | CPU 1 965 * | 966 * cnt1 timestamps | cnt2 timestamps 967 * 1 | 2 968 * 2 | 3 969 * - | 4 <--- max recorded 970 * 971 * ============ PASS n + 1 ============== 972 * CPU 0 | CPU 1 973 * | 974 * cnt1 timestamps | cnt2 timestamps 975 * 3 | 5 976 * 4 | 6 977 * 5 | 7 <---- max recorded 978 * 979 * Flush every events below timestamp 4 980 * 981 * ============ PASS n + 2 ============== 982 * CPU 0 | CPU 1 983 * | 984 * cnt1 timestamps | cnt2 timestamps 985 * 6 | 8 986 * 7 | 9 987 * - | 10 988 * 989 * Flush every events below timestamp 7 990 * etc... 991 */ 992 static int process_finished_round(struct perf_tool *tool __maybe_unused, 993 union perf_event *event __maybe_unused, 994 struct ordered_events *oe) 995 { 996 if (dump_trace) 997 fprintf(stdout, "\n"); 998 return ordered_events__flush(oe, OE_FLUSH__ROUND); 999 } 1000 1001 int perf_session__queue_event(struct perf_session *s, union perf_event *event, 1002 u64 timestamp, u64 file_offset) 1003 { 1004 return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset); 1005 } 1006 1007 static void callchain__lbr_callstack_printf(struct perf_sample *sample) 1008 { 1009 struct ip_callchain *callchain = sample->callchain; 1010 struct branch_stack *lbr_stack = sample->branch_stack; 1011 struct branch_entry *entries = perf_sample__branch_entries(sample); 1012 u64 kernel_callchain_nr = callchain->nr; 1013 unsigned int i; 1014 1015 for (i = 0; i < kernel_callchain_nr; i++) { 1016 if (callchain->ips[i] == PERF_CONTEXT_USER) 1017 break; 1018 } 1019 1020 if ((i != kernel_callchain_nr) && lbr_stack->nr) { 1021 u64 total_nr; 1022 /* 1023 * LBR callstack can only get user call chain, 1024 * i is kernel call chain number, 1025 * 1 is PERF_CONTEXT_USER. 1026 * 1027 * The user call chain is stored in LBR registers. 1028 * LBR are pair registers. The caller is stored 1029 * in "from" register, while the callee is stored 1030 * in "to" register. 1031 * For example, there is a call stack 1032 * "A"->"B"->"C"->"D". 1033 * The LBR registers will recorde like 1034 * "C"->"D", "B"->"C", "A"->"B". 1035 * So only the first "to" register and all "from" 1036 * registers are needed to construct the whole stack. 1037 */ 1038 total_nr = i + 1 + lbr_stack->nr + 1; 1039 kernel_callchain_nr = i + 1; 1040 1041 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr); 1042 1043 for (i = 0; i < kernel_callchain_nr; i++) 1044 printf("..... %2d: %016" PRIx64 "\n", 1045 i, callchain->ips[i]); 1046 1047 printf("..... %2d: %016" PRIx64 "\n", 1048 (int)(kernel_callchain_nr), entries[0].to); 1049 for (i = 0; i < lbr_stack->nr; i++) 1050 printf("..... %2d: %016" PRIx64 "\n", 1051 (int)(i + kernel_callchain_nr + 1), entries[i].from); 1052 } 1053 } 1054 1055 static void callchain__printf(struct evsel *evsel, 1056 struct perf_sample *sample) 1057 { 1058 unsigned int i; 1059 struct ip_callchain *callchain = sample->callchain; 1060 1061 if (evsel__has_branch_callstack(evsel)) 1062 callchain__lbr_callstack_printf(sample); 1063 1064 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr); 1065 1066 for (i = 0; i < callchain->nr; i++) 1067 printf("..... %2d: %016" PRIx64 "\n", 1068 i, callchain->ips[i]); 1069 } 1070 1071 static void branch_stack__printf(struct perf_sample *sample, bool callstack) 1072 { 1073 struct branch_entry *entries = perf_sample__branch_entries(sample); 1074 uint64_t i; 1075 1076 printf("%s: nr:%" PRIu64 "\n", 1077 !callstack ? "... branch stack" : "... branch callstack", 1078 sample->branch_stack->nr); 1079 1080 for (i = 0; i < sample->branch_stack->nr; i++) { 1081 struct branch_entry *e = &entries[i]; 1082 1083 if (!callstack) { 1084 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n", 1085 i, e->from, e->to, 1086 (unsigned short)e->flags.cycles, 1087 e->flags.mispred ? "M" : " ", 1088 e->flags.predicted ? "P" : " ", 1089 e->flags.abort ? "A" : " ", 1090 e->flags.in_tx ? "T" : " ", 1091 (unsigned)e->flags.reserved); 1092 } else { 1093 printf("..... %2"PRIu64": %016" PRIx64 "\n", 1094 i, i > 0 ? e->from : e->to); 1095 } 1096 } 1097 } 1098 1099 static void regs_dump__printf(u64 mask, u64 *regs) 1100 { 1101 unsigned rid, i = 0; 1102 1103 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { 1104 u64 val = regs[i++]; 1105 1106 printf(".... %-5s 0x%016" PRIx64 "\n", 1107 perf_reg_name(rid), val); 1108 } 1109 } 1110 1111 static const char *regs_abi[] = { 1112 [PERF_SAMPLE_REGS_ABI_NONE] = "none", 1113 [PERF_SAMPLE_REGS_ABI_32] = "32-bit", 1114 [PERF_SAMPLE_REGS_ABI_64] = "64-bit", 1115 }; 1116 1117 static inline const char *regs_dump_abi(struct regs_dump *d) 1118 { 1119 if (d->abi > PERF_SAMPLE_REGS_ABI_64) 1120 return "unknown"; 1121 1122 return regs_abi[d->abi]; 1123 } 1124 1125 static void regs__printf(const char *type, struct regs_dump *regs) 1126 { 1127 u64 mask = regs->mask; 1128 1129 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n", 1130 type, 1131 mask, 1132 regs_dump_abi(regs)); 1133 1134 regs_dump__printf(mask, regs->regs); 1135 } 1136 1137 static void regs_user__printf(struct perf_sample *sample) 1138 { 1139 struct regs_dump *user_regs = &sample->user_regs; 1140 1141 if (user_regs->regs) 1142 regs__printf("user", user_regs); 1143 } 1144 1145 static void regs_intr__printf(struct perf_sample *sample) 1146 { 1147 struct regs_dump *intr_regs = &sample->intr_regs; 1148 1149 if (intr_regs->regs) 1150 regs__printf("intr", intr_regs); 1151 } 1152 1153 static void stack_user__printf(struct stack_dump *dump) 1154 { 1155 printf("... ustack: size %" PRIu64 ", offset 0x%x\n", 1156 dump->size, dump->offset); 1157 } 1158 1159 static void perf_evlist__print_tstamp(struct evlist *evlist, 1160 union perf_event *event, 1161 struct perf_sample *sample) 1162 { 1163 u64 sample_type = __perf_evlist__combined_sample_type(evlist); 1164 1165 if (event->header.type != PERF_RECORD_SAMPLE && 1166 !perf_evlist__sample_id_all(evlist)) { 1167 fputs("-1 -1 ", stdout); 1168 return; 1169 } 1170 1171 if ((sample_type & PERF_SAMPLE_CPU)) 1172 printf("%u ", sample->cpu); 1173 1174 if (sample_type & PERF_SAMPLE_TIME) 1175 printf("%" PRIu64 " ", sample->time); 1176 } 1177 1178 static void sample_read__printf(struct perf_sample *sample, u64 read_format) 1179 { 1180 printf("... sample_read:\n"); 1181 1182 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1183 printf("...... time enabled %016" PRIx64 "\n", 1184 sample->read.time_enabled); 1185 1186 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1187 printf("...... time running %016" PRIx64 "\n", 1188 sample->read.time_running); 1189 1190 if (read_format & PERF_FORMAT_GROUP) { 1191 u64 i; 1192 1193 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr); 1194 1195 for (i = 0; i < sample->read.group.nr; i++) { 1196 struct sample_read_value *value; 1197 1198 value = &sample->read.group.values[i]; 1199 printf("..... id %016" PRIx64 1200 ", value %016" PRIx64 "\n", 1201 value->id, value->value); 1202 } 1203 } else 1204 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n", 1205 sample->read.one.id, sample->read.one.value); 1206 } 1207 1208 static void dump_event(struct evlist *evlist, union perf_event *event, 1209 u64 file_offset, struct perf_sample *sample) 1210 { 1211 if (!dump_trace) 1212 return; 1213 1214 printf("\n%#" PRIx64 " [%#x]: event: %d\n", 1215 file_offset, event->header.size, event->header.type); 1216 1217 trace_event(event); 1218 if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw) 1219 evlist->trace_event_sample_raw(evlist, event, sample); 1220 1221 if (sample) 1222 perf_evlist__print_tstamp(evlist, event, sample); 1223 1224 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 1225 event->header.size, perf_event__name(event->header.type)); 1226 } 1227 1228 static void dump_sample(struct evsel *evsel, union perf_event *event, 1229 struct perf_sample *sample) 1230 { 1231 u64 sample_type; 1232 1233 if (!dump_trace) 1234 return; 1235 1236 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 1237 event->header.misc, sample->pid, sample->tid, sample->ip, 1238 sample->period, sample->addr); 1239 1240 sample_type = evsel->core.attr.sample_type; 1241 1242 if (evsel__has_callchain(evsel)) 1243 callchain__printf(evsel, sample); 1244 1245 if (evsel__has_br_stack(evsel)) 1246 branch_stack__printf(sample, evsel__has_branch_callstack(evsel)); 1247 1248 if (sample_type & PERF_SAMPLE_REGS_USER) 1249 regs_user__printf(sample); 1250 1251 if (sample_type & PERF_SAMPLE_REGS_INTR) 1252 regs_intr__printf(sample); 1253 1254 if (sample_type & PERF_SAMPLE_STACK_USER) 1255 stack_user__printf(&sample->user_stack); 1256 1257 if (sample_type & PERF_SAMPLE_WEIGHT) 1258 printf("... weight: %" PRIu64 "\n", sample->weight); 1259 1260 if (sample_type & PERF_SAMPLE_DATA_SRC) 1261 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src); 1262 1263 if (sample_type & PERF_SAMPLE_PHYS_ADDR) 1264 printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr); 1265 1266 if (sample_type & PERF_SAMPLE_TRANSACTION) 1267 printf("... transaction: %" PRIx64 "\n", sample->transaction); 1268 1269 if (sample_type & PERF_SAMPLE_READ) 1270 sample_read__printf(sample, evsel->core.attr.read_format); 1271 } 1272 1273 static void dump_read(struct evsel *evsel, union perf_event *event) 1274 { 1275 struct perf_record_read *read_event = &event->read; 1276 u64 read_format; 1277 1278 if (!dump_trace) 1279 return; 1280 1281 printf(": %d %d %s %" PRI_lu64 "\n", event->read.pid, event->read.tid, 1282 evsel__name(evsel), event->read.value); 1283 1284 if (!evsel) 1285 return; 1286 1287 read_format = evsel->core.attr.read_format; 1288 1289 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1290 printf("... time enabled : %" PRI_lu64 "\n", read_event->time_enabled); 1291 1292 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1293 printf("... time running : %" PRI_lu64 "\n", read_event->time_running); 1294 1295 if (read_format & PERF_FORMAT_ID) 1296 printf("... id : %" PRI_lu64 "\n", read_event->id); 1297 } 1298 1299 static struct machine *machines__find_for_cpumode(struct machines *machines, 1300 union perf_event *event, 1301 struct perf_sample *sample) 1302 { 1303 struct machine *machine; 1304 1305 if (perf_guest && 1306 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 1307 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) { 1308 u32 pid; 1309 1310 if (event->header.type == PERF_RECORD_MMAP 1311 || event->header.type == PERF_RECORD_MMAP2) 1312 pid = event->mmap.pid; 1313 else 1314 pid = sample->pid; 1315 1316 machine = machines__find(machines, pid); 1317 if (!machine) 1318 machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID); 1319 return machine; 1320 } 1321 1322 return &machines->host; 1323 } 1324 1325 static int deliver_sample_value(struct evlist *evlist, 1326 struct perf_tool *tool, 1327 union perf_event *event, 1328 struct perf_sample *sample, 1329 struct sample_read_value *v, 1330 struct machine *machine) 1331 { 1332 struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id); 1333 struct evsel *evsel; 1334 1335 if (sid) { 1336 sample->id = v->id; 1337 sample->period = v->value - sid->period; 1338 sid->period = v->value; 1339 } 1340 1341 if (!sid || sid->evsel == NULL) { 1342 ++evlist->stats.nr_unknown_id; 1343 return 0; 1344 } 1345 1346 /* 1347 * There's no reason to deliver sample 1348 * for zero period, bail out. 1349 */ 1350 if (!sample->period) 1351 return 0; 1352 1353 evsel = container_of(sid->evsel, struct evsel, core); 1354 return tool->sample(tool, event, sample, evsel, machine); 1355 } 1356 1357 static int deliver_sample_group(struct evlist *evlist, 1358 struct perf_tool *tool, 1359 union perf_event *event, 1360 struct perf_sample *sample, 1361 struct machine *machine) 1362 { 1363 int ret = -EINVAL; 1364 u64 i; 1365 1366 for (i = 0; i < sample->read.group.nr; i++) { 1367 ret = deliver_sample_value(evlist, tool, event, sample, 1368 &sample->read.group.values[i], 1369 machine); 1370 if (ret) 1371 break; 1372 } 1373 1374 return ret; 1375 } 1376 1377 static int 1378 perf_evlist__deliver_sample(struct evlist *evlist, 1379 struct perf_tool *tool, 1380 union perf_event *event, 1381 struct perf_sample *sample, 1382 struct evsel *evsel, 1383 struct machine *machine) 1384 { 1385 /* We know evsel != NULL. */ 1386 u64 sample_type = evsel->core.attr.sample_type; 1387 u64 read_format = evsel->core.attr.read_format; 1388 1389 /* Standard sample delivery. */ 1390 if (!(sample_type & PERF_SAMPLE_READ)) 1391 return tool->sample(tool, event, sample, evsel, machine); 1392 1393 /* For PERF_SAMPLE_READ we have either single or group mode. */ 1394 if (read_format & PERF_FORMAT_GROUP) 1395 return deliver_sample_group(evlist, tool, event, sample, 1396 machine); 1397 else 1398 return deliver_sample_value(evlist, tool, event, sample, 1399 &sample->read.one, machine); 1400 } 1401 1402 static int machines__deliver_event(struct machines *machines, 1403 struct evlist *evlist, 1404 union perf_event *event, 1405 struct perf_sample *sample, 1406 struct perf_tool *tool, u64 file_offset) 1407 { 1408 struct evsel *evsel; 1409 struct machine *machine; 1410 1411 dump_event(evlist, event, file_offset, sample); 1412 1413 evsel = perf_evlist__id2evsel(evlist, sample->id); 1414 1415 machine = machines__find_for_cpumode(machines, event, sample); 1416 1417 switch (event->header.type) { 1418 case PERF_RECORD_SAMPLE: 1419 if (evsel == NULL) { 1420 ++evlist->stats.nr_unknown_id; 1421 return 0; 1422 } 1423 dump_sample(evsel, event, sample); 1424 if (machine == NULL) { 1425 ++evlist->stats.nr_unprocessable_samples; 1426 return 0; 1427 } 1428 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine); 1429 case PERF_RECORD_MMAP: 1430 return tool->mmap(tool, event, sample, machine); 1431 case PERF_RECORD_MMAP2: 1432 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT) 1433 ++evlist->stats.nr_proc_map_timeout; 1434 return tool->mmap2(tool, event, sample, machine); 1435 case PERF_RECORD_COMM: 1436 return tool->comm(tool, event, sample, machine); 1437 case PERF_RECORD_NAMESPACES: 1438 return tool->namespaces(tool, event, sample, machine); 1439 case PERF_RECORD_CGROUP: 1440 return tool->cgroup(tool, event, sample, machine); 1441 case PERF_RECORD_FORK: 1442 return tool->fork(tool, event, sample, machine); 1443 case PERF_RECORD_EXIT: 1444 return tool->exit(tool, event, sample, machine); 1445 case PERF_RECORD_LOST: 1446 if (tool->lost == perf_event__process_lost) 1447 evlist->stats.total_lost += event->lost.lost; 1448 return tool->lost(tool, event, sample, machine); 1449 case PERF_RECORD_LOST_SAMPLES: 1450 if (tool->lost_samples == perf_event__process_lost_samples) 1451 evlist->stats.total_lost_samples += event->lost_samples.lost; 1452 return tool->lost_samples(tool, event, sample, machine); 1453 case PERF_RECORD_READ: 1454 dump_read(evsel, event); 1455 return tool->read(tool, event, sample, evsel, machine); 1456 case PERF_RECORD_THROTTLE: 1457 return tool->throttle(tool, event, sample, machine); 1458 case PERF_RECORD_UNTHROTTLE: 1459 return tool->unthrottle(tool, event, sample, machine); 1460 case PERF_RECORD_AUX: 1461 if (tool->aux == perf_event__process_aux) { 1462 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) 1463 evlist->stats.total_aux_lost += 1; 1464 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL) 1465 evlist->stats.total_aux_partial += 1; 1466 } 1467 return tool->aux(tool, event, sample, machine); 1468 case PERF_RECORD_ITRACE_START: 1469 return tool->itrace_start(tool, event, sample, machine); 1470 case PERF_RECORD_SWITCH: 1471 case PERF_RECORD_SWITCH_CPU_WIDE: 1472 return tool->context_switch(tool, event, sample, machine); 1473 case PERF_RECORD_KSYMBOL: 1474 return tool->ksymbol(tool, event, sample, machine); 1475 case PERF_RECORD_BPF_EVENT: 1476 return tool->bpf(tool, event, sample, machine); 1477 default: 1478 ++evlist->stats.nr_unknown_events; 1479 return -1; 1480 } 1481 } 1482 1483 static int perf_session__deliver_event(struct perf_session *session, 1484 union perf_event *event, 1485 struct perf_tool *tool, 1486 u64 file_offset) 1487 { 1488 struct perf_sample sample; 1489 int ret; 1490 1491 ret = perf_evlist__parse_sample(session->evlist, event, &sample); 1492 if (ret) { 1493 pr_err("Can't parse sample, err = %d\n", ret); 1494 return ret; 1495 } 1496 1497 ret = auxtrace__process_event(session, event, &sample, tool); 1498 if (ret < 0) 1499 return ret; 1500 if (ret > 0) 1501 return 0; 1502 1503 ret = machines__deliver_event(&session->machines, session->evlist, 1504 event, &sample, tool, file_offset); 1505 1506 if (dump_trace && sample.aux_sample.size) 1507 auxtrace__dump_auxtrace_sample(session, &sample); 1508 1509 return ret; 1510 } 1511 1512 static s64 perf_session__process_user_event(struct perf_session *session, 1513 union perf_event *event, 1514 u64 file_offset) 1515 { 1516 struct ordered_events *oe = &session->ordered_events; 1517 struct perf_tool *tool = session->tool; 1518 struct perf_sample sample = { .time = 0, }; 1519 int fd = perf_data__fd(session->data); 1520 int err; 1521 1522 if (event->header.type != PERF_RECORD_COMPRESSED || 1523 tool->compressed == perf_session__process_compressed_event_stub) 1524 dump_event(session->evlist, event, file_offset, &sample); 1525 1526 /* These events are processed right away */ 1527 switch (event->header.type) { 1528 case PERF_RECORD_HEADER_ATTR: 1529 err = tool->attr(tool, event, &session->evlist); 1530 if (err == 0) { 1531 perf_session__set_id_hdr_size(session); 1532 perf_session__set_comm_exec(session); 1533 } 1534 return err; 1535 case PERF_RECORD_EVENT_UPDATE: 1536 return tool->event_update(tool, event, &session->evlist); 1537 case PERF_RECORD_HEADER_EVENT_TYPE: 1538 /* 1539 * Depreceated, but we need to handle it for sake 1540 * of old data files create in pipe mode. 1541 */ 1542 return 0; 1543 case PERF_RECORD_HEADER_TRACING_DATA: 1544 /* 1545 * Setup for reading amidst mmap, but only when we 1546 * are in 'file' mode. The 'pipe' fd is in proper 1547 * place already. 1548 */ 1549 if (!perf_data__is_pipe(session->data)) 1550 lseek(fd, file_offset, SEEK_SET); 1551 return tool->tracing_data(session, event); 1552 case PERF_RECORD_HEADER_BUILD_ID: 1553 return tool->build_id(session, event); 1554 case PERF_RECORD_FINISHED_ROUND: 1555 return tool->finished_round(tool, event, oe); 1556 case PERF_RECORD_ID_INDEX: 1557 return tool->id_index(session, event); 1558 case PERF_RECORD_AUXTRACE_INFO: 1559 return tool->auxtrace_info(session, event); 1560 case PERF_RECORD_AUXTRACE: 1561 /* setup for reading amidst mmap */ 1562 lseek(fd, file_offset + event->header.size, SEEK_SET); 1563 return tool->auxtrace(session, event); 1564 case PERF_RECORD_AUXTRACE_ERROR: 1565 perf_session__auxtrace_error_inc(session, event); 1566 return tool->auxtrace_error(session, event); 1567 case PERF_RECORD_THREAD_MAP: 1568 return tool->thread_map(session, event); 1569 case PERF_RECORD_CPU_MAP: 1570 return tool->cpu_map(session, event); 1571 case PERF_RECORD_STAT_CONFIG: 1572 return tool->stat_config(session, event); 1573 case PERF_RECORD_STAT: 1574 return tool->stat(session, event); 1575 case PERF_RECORD_STAT_ROUND: 1576 return tool->stat_round(session, event); 1577 case PERF_RECORD_TIME_CONV: 1578 session->time_conv = event->time_conv; 1579 return tool->time_conv(session, event); 1580 case PERF_RECORD_HEADER_FEATURE: 1581 return tool->feature(session, event); 1582 case PERF_RECORD_COMPRESSED: 1583 err = tool->compressed(session, event, file_offset); 1584 if (err) 1585 dump_event(session->evlist, event, file_offset, &sample); 1586 return err; 1587 default: 1588 return -EINVAL; 1589 } 1590 } 1591 1592 int perf_session__deliver_synth_event(struct perf_session *session, 1593 union perf_event *event, 1594 struct perf_sample *sample) 1595 { 1596 struct evlist *evlist = session->evlist; 1597 struct perf_tool *tool = session->tool; 1598 1599 events_stats__inc(&evlist->stats, event->header.type); 1600 1601 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1602 return perf_session__process_user_event(session, event, 0); 1603 1604 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0); 1605 } 1606 1607 static void event_swap(union perf_event *event, bool sample_id_all) 1608 { 1609 perf_event__swap_op swap; 1610 1611 swap = perf_event__swap_ops[event->header.type]; 1612 if (swap) 1613 swap(event, sample_id_all); 1614 } 1615 1616 int perf_session__peek_event(struct perf_session *session, off_t file_offset, 1617 void *buf, size_t buf_sz, 1618 union perf_event **event_ptr, 1619 struct perf_sample *sample) 1620 { 1621 union perf_event *event; 1622 size_t hdr_sz, rest; 1623 int fd; 1624 1625 if (session->one_mmap && !session->header.needs_swap) { 1626 event = file_offset - session->one_mmap_offset + 1627 session->one_mmap_addr; 1628 goto out_parse_sample; 1629 } 1630 1631 if (perf_data__is_pipe(session->data)) 1632 return -1; 1633 1634 fd = perf_data__fd(session->data); 1635 hdr_sz = sizeof(struct perf_event_header); 1636 1637 if (buf_sz < hdr_sz) 1638 return -1; 1639 1640 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 || 1641 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz) 1642 return -1; 1643 1644 event = (union perf_event *)buf; 1645 1646 if (session->header.needs_swap) 1647 perf_event_header__bswap(&event->header); 1648 1649 if (event->header.size < hdr_sz || event->header.size > buf_sz) 1650 return -1; 1651 1652 rest = event->header.size - hdr_sz; 1653 1654 if (readn(fd, buf, rest) != (ssize_t)rest) 1655 return -1; 1656 1657 if (session->header.needs_swap) 1658 event_swap(event, perf_evlist__sample_id_all(session->evlist)); 1659 1660 out_parse_sample: 1661 1662 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START && 1663 perf_evlist__parse_sample(session->evlist, event, sample)) 1664 return -1; 1665 1666 *event_ptr = event; 1667 1668 return 0; 1669 } 1670 1671 int perf_session__peek_events(struct perf_session *session, u64 offset, 1672 u64 size, peek_events_cb_t cb, void *data) 1673 { 1674 u64 max_offset = offset + size; 1675 char buf[PERF_SAMPLE_MAX_SIZE]; 1676 union perf_event *event; 1677 int err; 1678 1679 do { 1680 err = perf_session__peek_event(session, offset, buf, 1681 PERF_SAMPLE_MAX_SIZE, &event, 1682 NULL); 1683 if (err) 1684 return err; 1685 1686 err = cb(session, event, offset, data); 1687 if (err) 1688 return err; 1689 1690 offset += event->header.size; 1691 if (event->header.type == PERF_RECORD_AUXTRACE) 1692 offset += event->auxtrace.size; 1693 1694 } while (offset < max_offset); 1695 1696 return err; 1697 } 1698 1699 static s64 perf_session__process_event(struct perf_session *session, 1700 union perf_event *event, u64 file_offset) 1701 { 1702 struct evlist *evlist = session->evlist; 1703 struct perf_tool *tool = session->tool; 1704 int ret; 1705 1706 if (session->header.needs_swap) 1707 event_swap(event, perf_evlist__sample_id_all(evlist)); 1708 1709 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1710 return -EINVAL; 1711 1712 events_stats__inc(&evlist->stats, event->header.type); 1713 1714 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1715 return perf_session__process_user_event(session, event, file_offset); 1716 1717 if (tool->ordered_events) { 1718 u64 timestamp = -1ULL; 1719 1720 ret = perf_evlist__parse_sample_timestamp(evlist, event, ×tamp); 1721 if (ret && ret != -1) 1722 return ret; 1723 1724 ret = perf_session__queue_event(session, event, timestamp, file_offset); 1725 if (ret != -ETIME) 1726 return ret; 1727 } 1728 1729 return perf_session__deliver_event(session, event, tool, file_offset); 1730 } 1731 1732 void perf_event_header__bswap(struct perf_event_header *hdr) 1733 { 1734 hdr->type = bswap_32(hdr->type); 1735 hdr->misc = bswap_16(hdr->misc); 1736 hdr->size = bswap_16(hdr->size); 1737 } 1738 1739 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1740 { 1741 return machine__findnew_thread(&session->machines.host, -1, pid); 1742 } 1743 1744 /* 1745 * Threads are identified by pid and tid, and the idle task has pid == tid == 0. 1746 * So here a single thread is created for that, but actually there is a separate 1747 * idle task per cpu, so there should be one 'struct thread' per cpu, but there 1748 * is only 1. That causes problems for some tools, requiring workarounds. For 1749 * example get_idle_thread() in builtin-sched.c, or thread_stack__per_cpu(). 1750 */ 1751 int perf_session__register_idle_thread(struct perf_session *session) 1752 { 1753 struct thread *thread; 1754 int err = 0; 1755 1756 thread = machine__findnew_thread(&session->machines.host, 0, 0); 1757 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) { 1758 pr_err("problem inserting idle task.\n"); 1759 err = -1; 1760 } 1761 1762 if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) { 1763 pr_err("problem inserting idle task.\n"); 1764 err = -1; 1765 } 1766 1767 /* machine__findnew_thread() got the thread, so put it */ 1768 thread__put(thread); 1769 return err; 1770 } 1771 1772 static void 1773 perf_session__warn_order(const struct perf_session *session) 1774 { 1775 const struct ordered_events *oe = &session->ordered_events; 1776 struct evsel *evsel; 1777 bool should_warn = true; 1778 1779 evlist__for_each_entry(session->evlist, evsel) { 1780 if (evsel->core.attr.write_backward) 1781 should_warn = false; 1782 } 1783 1784 if (!should_warn) 1785 return; 1786 if (oe->nr_unordered_events != 0) 1787 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events); 1788 } 1789 1790 static void perf_session__warn_about_errors(const struct perf_session *session) 1791 { 1792 const struct events_stats *stats = &session->evlist->stats; 1793 1794 if (session->tool->lost == perf_event__process_lost && 1795 stats->nr_events[PERF_RECORD_LOST] != 0) { 1796 ui__warning("Processed %d events and lost %d chunks!\n\n" 1797 "Check IO/CPU overload!\n\n", 1798 stats->nr_events[0], 1799 stats->nr_events[PERF_RECORD_LOST]); 1800 } 1801 1802 if (session->tool->lost_samples == perf_event__process_lost_samples) { 1803 double drop_rate; 1804 1805 drop_rate = (double)stats->total_lost_samples / 1806 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples); 1807 if (drop_rate > 0.05) { 1808 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n", 1809 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples, 1810 drop_rate * 100.0); 1811 } 1812 } 1813 1814 if (session->tool->aux == perf_event__process_aux && 1815 stats->total_aux_lost != 0) { 1816 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n", 1817 stats->total_aux_lost, 1818 stats->nr_events[PERF_RECORD_AUX]); 1819 } 1820 1821 if (session->tool->aux == perf_event__process_aux && 1822 stats->total_aux_partial != 0) { 1823 bool vmm_exclusive = false; 1824 1825 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive", 1826 &vmm_exclusive); 1827 1828 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n" 1829 "Are you running a KVM guest in the background?%s\n\n", 1830 stats->total_aux_partial, 1831 stats->nr_events[PERF_RECORD_AUX], 1832 vmm_exclusive ? 1833 "\nReloading kvm_intel module with vmm_exclusive=0\n" 1834 "will reduce the gaps to only guest's timeslices." : 1835 ""); 1836 } 1837 1838 if (stats->nr_unknown_events != 0) { 1839 ui__warning("Found %u unknown events!\n\n" 1840 "Is this an older tool processing a perf.data " 1841 "file generated by a more recent tool?\n\n" 1842 "If that is not the case, consider " 1843 "reporting to linux-kernel@vger.kernel.org.\n\n", 1844 stats->nr_unknown_events); 1845 } 1846 1847 if (stats->nr_unknown_id != 0) { 1848 ui__warning("%u samples with id not present in the header\n", 1849 stats->nr_unknown_id); 1850 } 1851 1852 if (stats->nr_invalid_chains != 0) { 1853 ui__warning("Found invalid callchains!\n\n" 1854 "%u out of %u events were discarded for this reason.\n\n" 1855 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1856 stats->nr_invalid_chains, 1857 stats->nr_events[PERF_RECORD_SAMPLE]); 1858 } 1859 1860 if (stats->nr_unprocessable_samples != 0) { 1861 ui__warning("%u unprocessable samples recorded.\n" 1862 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1863 stats->nr_unprocessable_samples); 1864 } 1865 1866 perf_session__warn_order(session); 1867 1868 events_stats__auxtrace_error_warn(stats); 1869 1870 if (stats->nr_proc_map_timeout != 0) { 1871 ui__warning("%d map information files for pre-existing threads were\n" 1872 "not processed, if there are samples for addresses they\n" 1873 "will not be resolved, you may find out which are these\n" 1874 "threads by running with -v and redirecting the output\n" 1875 "to a file.\n" 1876 "The time limit to process proc map is too short?\n" 1877 "Increase it by --proc-map-timeout\n", 1878 stats->nr_proc_map_timeout); 1879 } 1880 } 1881 1882 static int perf_session__flush_thread_stack(struct thread *thread, 1883 void *p __maybe_unused) 1884 { 1885 return thread_stack__flush(thread); 1886 } 1887 1888 static int perf_session__flush_thread_stacks(struct perf_session *session) 1889 { 1890 return machines__for_each_thread(&session->machines, 1891 perf_session__flush_thread_stack, 1892 NULL); 1893 } 1894 1895 volatile int session_done; 1896 1897 static int __perf_session__process_decomp_events(struct perf_session *session); 1898 1899 static int __perf_session__process_pipe_events(struct perf_session *session) 1900 { 1901 struct ordered_events *oe = &session->ordered_events; 1902 struct perf_tool *tool = session->tool; 1903 int fd = perf_data__fd(session->data); 1904 union perf_event *event; 1905 uint32_t size, cur_size = 0; 1906 void *buf = NULL; 1907 s64 skip = 0; 1908 u64 head; 1909 ssize_t err; 1910 void *p; 1911 1912 perf_tool__fill_defaults(tool); 1913 1914 head = 0; 1915 cur_size = sizeof(union perf_event); 1916 1917 buf = malloc(cur_size); 1918 if (!buf) 1919 return -errno; 1920 ordered_events__set_copy_on_queue(oe, true); 1921 more: 1922 event = buf; 1923 err = readn(fd, event, sizeof(struct perf_event_header)); 1924 if (err <= 0) { 1925 if (err == 0) 1926 goto done; 1927 1928 pr_err("failed to read event header\n"); 1929 goto out_err; 1930 } 1931 1932 if (session->header.needs_swap) 1933 perf_event_header__bswap(&event->header); 1934 1935 size = event->header.size; 1936 if (size < sizeof(struct perf_event_header)) { 1937 pr_err("bad event header size\n"); 1938 goto out_err; 1939 } 1940 1941 if (size > cur_size) { 1942 void *new = realloc(buf, size); 1943 if (!new) { 1944 pr_err("failed to allocate memory to read event\n"); 1945 goto out_err; 1946 } 1947 buf = new; 1948 cur_size = size; 1949 event = buf; 1950 } 1951 p = event; 1952 p += sizeof(struct perf_event_header); 1953 1954 if (size - sizeof(struct perf_event_header)) { 1955 err = readn(fd, p, size - sizeof(struct perf_event_header)); 1956 if (err <= 0) { 1957 if (err == 0) { 1958 pr_err("unexpected end of event stream\n"); 1959 goto done; 1960 } 1961 1962 pr_err("failed to read event data\n"); 1963 goto out_err; 1964 } 1965 } 1966 1967 if ((skip = perf_session__process_event(session, event, head)) < 0) { 1968 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1969 head, event->header.size, event->header.type); 1970 err = -EINVAL; 1971 goto out_err; 1972 } 1973 1974 head += size; 1975 1976 if (skip > 0) 1977 head += skip; 1978 1979 err = __perf_session__process_decomp_events(session); 1980 if (err) 1981 goto out_err; 1982 1983 if (!session_done()) 1984 goto more; 1985 done: 1986 /* do the final flush for ordered samples */ 1987 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 1988 if (err) 1989 goto out_err; 1990 err = auxtrace__flush_events(session, tool); 1991 if (err) 1992 goto out_err; 1993 err = perf_session__flush_thread_stacks(session); 1994 out_err: 1995 free(buf); 1996 if (!tool->no_warn) 1997 perf_session__warn_about_errors(session); 1998 ordered_events__free(&session->ordered_events); 1999 auxtrace__free_events(session); 2000 return err; 2001 } 2002 2003 static union perf_event * 2004 prefetch_event(char *buf, u64 head, size_t mmap_size, 2005 bool needs_swap, union perf_event *error) 2006 { 2007 union perf_event *event; 2008 2009 /* 2010 * Ensure we have enough space remaining to read 2011 * the size of the event in the headers. 2012 */ 2013 if (head + sizeof(event->header) > mmap_size) 2014 return NULL; 2015 2016 event = (union perf_event *)(buf + head); 2017 if (needs_swap) 2018 perf_event_header__bswap(&event->header); 2019 2020 if (head + event->header.size <= mmap_size) 2021 return event; 2022 2023 /* We're not fetching the event so swap back again */ 2024 if (needs_swap) 2025 perf_event_header__bswap(&event->header); 2026 2027 pr_debug("%s: head=%#" PRIx64 " event->header_size=%#x, mmap_size=%#zx:" 2028 " fuzzed or compressed perf.data?\n",__func__, head, event->header.size, mmap_size); 2029 2030 return error; 2031 } 2032 2033 static union perf_event * 2034 fetch_mmaped_event(u64 head, size_t mmap_size, char *buf, bool needs_swap) 2035 { 2036 return prefetch_event(buf, head, mmap_size, needs_swap, ERR_PTR(-EINVAL)); 2037 } 2038 2039 static union perf_event * 2040 fetch_decomp_event(u64 head, size_t mmap_size, char *buf, bool needs_swap) 2041 { 2042 return prefetch_event(buf, head, mmap_size, needs_swap, NULL); 2043 } 2044 2045 static int __perf_session__process_decomp_events(struct perf_session *session) 2046 { 2047 s64 skip; 2048 u64 size, file_pos = 0; 2049 struct decomp *decomp = session->decomp_last; 2050 2051 if (!decomp) 2052 return 0; 2053 2054 while (decomp->head < decomp->size && !session_done()) { 2055 union perf_event *event = fetch_decomp_event(decomp->head, decomp->size, decomp->data, 2056 session->header.needs_swap); 2057 2058 if (!event) 2059 break; 2060 2061 size = event->header.size; 2062 2063 if (size < sizeof(struct perf_event_header) || 2064 (skip = perf_session__process_event(session, event, file_pos)) < 0) { 2065 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 2066 decomp->file_pos + decomp->head, event->header.size, event->header.type); 2067 return -EINVAL; 2068 } 2069 2070 if (skip) 2071 size += skip; 2072 2073 decomp->head += size; 2074 } 2075 2076 return 0; 2077 } 2078 2079 /* 2080 * On 64bit we can mmap the data file in one go. No need for tiny mmap 2081 * slices. On 32bit we use 32MB. 2082 */ 2083 #if BITS_PER_LONG == 64 2084 #define MMAP_SIZE ULLONG_MAX 2085 #define NUM_MMAPS 1 2086 #else 2087 #define MMAP_SIZE (32 * 1024 * 1024ULL) 2088 #define NUM_MMAPS 128 2089 #endif 2090 2091 struct reader; 2092 2093 typedef s64 (*reader_cb_t)(struct perf_session *session, 2094 union perf_event *event, 2095 u64 file_offset); 2096 2097 struct reader { 2098 int fd; 2099 u64 data_size; 2100 u64 data_offset; 2101 reader_cb_t process; 2102 }; 2103 2104 static int 2105 reader__process_events(struct reader *rd, struct perf_session *session, 2106 struct ui_progress *prog) 2107 { 2108 u64 data_size = rd->data_size; 2109 u64 head, page_offset, file_offset, file_pos, size; 2110 int err = 0, mmap_prot, mmap_flags, map_idx = 0; 2111 size_t mmap_size; 2112 char *buf, *mmaps[NUM_MMAPS]; 2113 union perf_event *event; 2114 s64 skip; 2115 2116 page_offset = page_size * (rd->data_offset / page_size); 2117 file_offset = page_offset; 2118 head = rd->data_offset - page_offset; 2119 2120 ui_progress__init_size(prog, data_size, "Processing events..."); 2121 2122 data_size += rd->data_offset; 2123 2124 mmap_size = MMAP_SIZE; 2125 if (mmap_size > data_size) { 2126 mmap_size = data_size; 2127 session->one_mmap = true; 2128 } 2129 2130 memset(mmaps, 0, sizeof(mmaps)); 2131 2132 mmap_prot = PROT_READ; 2133 mmap_flags = MAP_SHARED; 2134 2135 if (session->header.needs_swap) { 2136 mmap_prot |= PROT_WRITE; 2137 mmap_flags = MAP_PRIVATE; 2138 } 2139 remap: 2140 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, rd->fd, 2141 file_offset); 2142 if (buf == MAP_FAILED) { 2143 pr_err("failed to mmap file\n"); 2144 err = -errno; 2145 goto out; 2146 } 2147 mmaps[map_idx] = buf; 2148 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 2149 file_pos = file_offset + head; 2150 if (session->one_mmap) { 2151 session->one_mmap_addr = buf; 2152 session->one_mmap_offset = file_offset; 2153 } 2154 2155 more: 2156 event = fetch_mmaped_event(head, mmap_size, buf, session->header.needs_swap); 2157 if (IS_ERR(event)) 2158 return PTR_ERR(event); 2159 2160 if (!event) { 2161 if (mmaps[map_idx]) { 2162 munmap(mmaps[map_idx], mmap_size); 2163 mmaps[map_idx] = NULL; 2164 } 2165 2166 page_offset = page_size * (head / page_size); 2167 file_offset += page_offset; 2168 head -= page_offset; 2169 goto remap; 2170 } 2171 2172 size = event->header.size; 2173 2174 skip = -EINVAL; 2175 2176 if (size < sizeof(struct perf_event_header) || 2177 (skip = rd->process(session, event, file_pos)) < 0) { 2178 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n", 2179 file_offset + head, event->header.size, 2180 event->header.type, strerror(-skip)); 2181 err = skip; 2182 goto out; 2183 } 2184 2185 if (skip) 2186 size += skip; 2187 2188 head += size; 2189 file_pos += size; 2190 2191 err = __perf_session__process_decomp_events(session); 2192 if (err) 2193 goto out; 2194 2195 ui_progress__update(prog, size); 2196 2197 if (session_done()) 2198 goto out; 2199 2200 if (file_pos < data_size) 2201 goto more; 2202 2203 out: 2204 return err; 2205 } 2206 2207 static s64 process_simple(struct perf_session *session, 2208 union perf_event *event, 2209 u64 file_offset) 2210 { 2211 return perf_session__process_event(session, event, file_offset); 2212 } 2213 2214 static int __perf_session__process_events(struct perf_session *session) 2215 { 2216 struct reader rd = { 2217 .fd = perf_data__fd(session->data), 2218 .data_size = session->header.data_size, 2219 .data_offset = session->header.data_offset, 2220 .process = process_simple, 2221 }; 2222 struct ordered_events *oe = &session->ordered_events; 2223 struct perf_tool *tool = session->tool; 2224 struct ui_progress prog; 2225 int err; 2226 2227 perf_tool__fill_defaults(tool); 2228 2229 if (rd.data_size == 0) 2230 return -1; 2231 2232 ui_progress__init_size(&prog, rd.data_size, "Processing events..."); 2233 2234 err = reader__process_events(&rd, session, &prog); 2235 if (err) 2236 goto out_err; 2237 /* do the final flush for ordered samples */ 2238 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 2239 if (err) 2240 goto out_err; 2241 err = auxtrace__flush_events(session, tool); 2242 if (err) 2243 goto out_err; 2244 err = perf_session__flush_thread_stacks(session); 2245 out_err: 2246 ui_progress__finish(); 2247 if (!tool->no_warn) 2248 perf_session__warn_about_errors(session); 2249 /* 2250 * We may switching perf.data output, make ordered_events 2251 * reusable. 2252 */ 2253 ordered_events__reinit(&session->ordered_events); 2254 auxtrace__free_events(session); 2255 session->one_mmap = false; 2256 return err; 2257 } 2258 2259 int perf_session__process_events(struct perf_session *session) 2260 { 2261 if (perf_session__register_idle_thread(session) < 0) 2262 return -ENOMEM; 2263 2264 if (perf_data__is_pipe(session->data)) 2265 return __perf_session__process_pipe_events(session); 2266 2267 return __perf_session__process_events(session); 2268 } 2269 2270 bool perf_session__has_traces(struct perf_session *session, const char *msg) 2271 { 2272 struct evsel *evsel; 2273 2274 evlist__for_each_entry(session->evlist, evsel) { 2275 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) 2276 return true; 2277 } 2278 2279 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 2280 return false; 2281 } 2282 2283 int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr) 2284 { 2285 char *bracket; 2286 struct ref_reloc_sym *ref; 2287 struct kmap *kmap; 2288 2289 ref = zalloc(sizeof(struct ref_reloc_sym)); 2290 if (ref == NULL) 2291 return -ENOMEM; 2292 2293 ref->name = strdup(symbol_name); 2294 if (ref->name == NULL) { 2295 free(ref); 2296 return -ENOMEM; 2297 } 2298 2299 bracket = strchr(ref->name, ']'); 2300 if (bracket) 2301 *bracket = '\0'; 2302 2303 ref->addr = addr; 2304 2305 kmap = map__kmap(map); 2306 if (kmap) 2307 kmap->ref_reloc_sym = ref; 2308 2309 return 0; 2310 } 2311 2312 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp) 2313 { 2314 return machines__fprintf_dsos(&session->machines, fp); 2315 } 2316 2317 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp, 2318 bool (skip)(struct dso *dso, int parm), int parm) 2319 { 2320 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm); 2321 } 2322 2323 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 2324 { 2325 size_t ret; 2326 const char *msg = ""; 2327 2328 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE)) 2329 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)"; 2330 2331 ret = fprintf(fp, "\nAggregated stats:%s\n", msg); 2332 2333 ret += events_stats__fprintf(&session->evlist->stats, fp); 2334 return ret; 2335 } 2336 2337 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 2338 { 2339 /* 2340 * FIXME: Here we have to actually print all the machines in this 2341 * session, not just the host... 2342 */ 2343 return machine__fprintf(&session->machines.host, fp); 2344 } 2345 2346 struct evsel *perf_session__find_first_evtype(struct perf_session *session, 2347 unsigned int type) 2348 { 2349 struct evsel *pos; 2350 2351 evlist__for_each_entry(session->evlist, pos) { 2352 if (pos->core.attr.type == type) 2353 return pos; 2354 } 2355 return NULL; 2356 } 2357 2358 int perf_session__cpu_bitmap(struct perf_session *session, 2359 const char *cpu_list, unsigned long *cpu_bitmap) 2360 { 2361 int i, err = -1; 2362 struct perf_cpu_map *map; 2363 int nr_cpus = min(session->header.env.nr_cpus_online, MAX_NR_CPUS); 2364 2365 for (i = 0; i < PERF_TYPE_MAX; ++i) { 2366 struct evsel *evsel; 2367 2368 evsel = perf_session__find_first_evtype(session, i); 2369 if (!evsel) 2370 continue; 2371 2372 if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CPU)) { 2373 pr_err("File does not contain CPU events. " 2374 "Remove -C option to proceed.\n"); 2375 return -1; 2376 } 2377 } 2378 2379 map = perf_cpu_map__new(cpu_list); 2380 if (map == NULL) { 2381 pr_err("Invalid cpu_list\n"); 2382 return -1; 2383 } 2384 2385 for (i = 0; i < map->nr; i++) { 2386 int cpu = map->map[i]; 2387 2388 if (cpu >= nr_cpus) { 2389 pr_err("Requested CPU %d too large. " 2390 "Consider raising MAX_NR_CPUS\n", cpu); 2391 goto out_delete_map; 2392 } 2393 2394 set_bit(cpu, cpu_bitmap); 2395 } 2396 2397 err = 0; 2398 2399 out_delete_map: 2400 perf_cpu_map__put(map); 2401 return err; 2402 } 2403 2404 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 2405 bool full) 2406 { 2407 if (session == NULL || fp == NULL) 2408 return; 2409 2410 fprintf(fp, "# ========\n"); 2411 perf_header__fprintf_info(session, fp, full); 2412 fprintf(fp, "# ========\n#\n"); 2413 } 2414 2415 int perf_event__process_id_index(struct perf_session *session, 2416 union perf_event *event) 2417 { 2418 struct evlist *evlist = session->evlist; 2419 struct perf_record_id_index *ie = &event->id_index; 2420 size_t i, nr, max_nr; 2421 2422 max_nr = (ie->header.size - sizeof(struct perf_record_id_index)) / 2423 sizeof(struct id_index_entry); 2424 nr = ie->nr; 2425 if (nr > max_nr) 2426 return -EINVAL; 2427 2428 if (dump_trace) 2429 fprintf(stdout, " nr: %zu\n", nr); 2430 2431 for (i = 0; i < nr; i++) { 2432 struct id_index_entry *e = &ie->entries[i]; 2433 struct perf_sample_id *sid; 2434 2435 if (dump_trace) { 2436 fprintf(stdout, " ... id: %"PRI_lu64, e->id); 2437 fprintf(stdout, " idx: %"PRI_lu64, e->idx); 2438 fprintf(stdout, " cpu: %"PRI_ld64, e->cpu); 2439 fprintf(stdout, " tid: %"PRI_ld64"\n", e->tid); 2440 } 2441 2442 sid = perf_evlist__id2sid(evlist, e->id); 2443 if (!sid) 2444 return -ENOENT; 2445 sid->idx = e->idx; 2446 sid->cpu = e->cpu; 2447 sid->tid = e->tid; 2448 } 2449 return 0; 2450 } 2451