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 "tsc.h" 33 #include "ui/progress.h" 34 #include "../perf.h" 35 #include "arch/common.h" 36 #include "units.h" 37 #include <internal/lib.h> 38 39 #ifdef HAVE_ZSTD_SUPPORT 40 static int perf_session__process_compressed_event(struct perf_session *session, 41 union perf_event *event, u64 file_offset) 42 { 43 void *src; 44 size_t decomp_size, src_size; 45 u64 decomp_last_rem = 0; 46 size_t mmap_len, decomp_len = session->header.env.comp_mmap_len; 47 struct decomp *decomp, *decomp_last = session->decomp_last; 48 49 if (decomp_last) { 50 decomp_last_rem = decomp_last->size - decomp_last->head; 51 decomp_len += decomp_last_rem; 52 } 53 54 mmap_len = sizeof(struct decomp) + decomp_len; 55 decomp = mmap(NULL, mmap_len, PROT_READ|PROT_WRITE, 56 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); 57 if (decomp == MAP_FAILED) { 58 pr_err("Couldn't allocate memory for decompression\n"); 59 return -1; 60 } 61 62 decomp->file_pos = file_offset; 63 decomp->mmap_len = mmap_len; 64 decomp->head = 0; 65 66 if (decomp_last_rem) { 67 memcpy(decomp->data, &(decomp_last->data[decomp_last->head]), decomp_last_rem); 68 decomp->size = decomp_last_rem; 69 } 70 71 src = (void *)event + sizeof(struct perf_record_compressed); 72 src_size = event->pack.header.size - sizeof(struct perf_record_compressed); 73 74 decomp_size = zstd_decompress_stream(&(session->zstd_data), src, src_size, 75 &(decomp->data[decomp_last_rem]), decomp_len - decomp_last_rem); 76 if (!decomp_size) { 77 munmap(decomp, mmap_len); 78 pr_err("Couldn't decompress data\n"); 79 return -1; 80 } 81 82 decomp->size += decomp_size; 83 84 if (session->decomp == NULL) { 85 session->decomp = decomp; 86 session->decomp_last = decomp; 87 } else { 88 session->decomp_last->next = decomp; 89 session->decomp_last = decomp; 90 } 91 92 pr_debug("decomp (B): %zd to %zd\n", src_size, decomp_size); 93 94 return 0; 95 } 96 #else /* !HAVE_ZSTD_SUPPORT */ 97 #define perf_session__process_compressed_event perf_session__process_compressed_event_stub 98 #endif 99 100 static int perf_session__deliver_event(struct perf_session *session, 101 union perf_event *event, 102 struct perf_tool *tool, 103 u64 file_offset); 104 105 static int perf_session__open(struct perf_session *session, int repipe_fd) 106 { 107 struct perf_data *data = session->data; 108 109 if (perf_session__read_header(session, repipe_fd) < 0) { 110 pr_err("incompatible file format (rerun with -v to learn more)\n"); 111 return -1; 112 } 113 114 if (perf_data__is_pipe(data)) 115 return 0; 116 117 if (perf_header__has_feat(&session->header, HEADER_STAT)) 118 return 0; 119 120 if (!evlist__valid_sample_type(session->evlist)) { 121 pr_err("non matching sample_type\n"); 122 return -1; 123 } 124 125 if (!evlist__valid_sample_id_all(session->evlist)) { 126 pr_err("non matching sample_id_all\n"); 127 return -1; 128 } 129 130 if (!evlist__valid_read_format(session->evlist)) { 131 pr_err("non matching read_format\n"); 132 return -1; 133 } 134 135 return 0; 136 } 137 138 void perf_session__set_id_hdr_size(struct perf_session *session) 139 { 140 u16 id_hdr_size = evlist__id_hdr_size(session->evlist); 141 142 machines__set_id_hdr_size(&session->machines, id_hdr_size); 143 } 144 145 int perf_session__create_kernel_maps(struct perf_session *session) 146 { 147 int ret = machine__create_kernel_maps(&session->machines.host); 148 149 if (ret >= 0) 150 ret = machines__create_guest_kernel_maps(&session->machines); 151 return ret; 152 } 153 154 static void perf_session__destroy_kernel_maps(struct perf_session *session) 155 { 156 machines__destroy_kernel_maps(&session->machines); 157 } 158 159 static bool perf_session__has_comm_exec(struct perf_session *session) 160 { 161 struct evsel *evsel; 162 163 evlist__for_each_entry(session->evlist, evsel) { 164 if (evsel->core.attr.comm_exec) 165 return true; 166 } 167 168 return false; 169 } 170 171 static void perf_session__set_comm_exec(struct perf_session *session) 172 { 173 bool comm_exec = perf_session__has_comm_exec(session); 174 175 machines__set_comm_exec(&session->machines, comm_exec); 176 } 177 178 static int ordered_events__deliver_event(struct ordered_events *oe, 179 struct ordered_event *event) 180 { 181 struct perf_session *session = container_of(oe, struct perf_session, 182 ordered_events); 183 184 return perf_session__deliver_event(session, event->event, 185 session->tool, event->file_offset); 186 } 187 188 struct perf_session *__perf_session__new(struct perf_data *data, 189 bool repipe, int repipe_fd, 190 struct perf_tool *tool) 191 { 192 int ret = -ENOMEM; 193 struct perf_session *session = zalloc(sizeof(*session)); 194 195 if (!session) 196 goto out; 197 198 session->repipe = repipe; 199 session->tool = tool; 200 INIT_LIST_HEAD(&session->auxtrace_index); 201 machines__init(&session->machines); 202 ordered_events__init(&session->ordered_events, 203 ordered_events__deliver_event, NULL); 204 205 perf_env__init(&session->header.env); 206 if (data) { 207 ret = perf_data__open(data); 208 if (ret < 0) 209 goto out_delete; 210 211 session->data = data; 212 213 if (perf_data__is_read(data)) { 214 ret = perf_session__open(session, repipe_fd); 215 if (ret < 0) 216 goto out_delete; 217 218 /* 219 * set session attributes that are present in perf.data 220 * but not in pipe-mode. 221 */ 222 if (!data->is_pipe) { 223 perf_session__set_id_hdr_size(session); 224 perf_session__set_comm_exec(session); 225 } 226 227 evlist__init_trace_event_sample_raw(session->evlist); 228 229 /* Open the directory data. */ 230 if (data->is_dir) { 231 ret = perf_data__open_dir(data); 232 if (ret) 233 goto out_delete; 234 } 235 236 if (!symbol_conf.kallsyms_name && 237 !symbol_conf.vmlinux_name) 238 symbol_conf.kallsyms_name = perf_data__kallsyms_name(data); 239 } 240 } else { 241 session->machines.host.env = &perf_env; 242 } 243 244 session->machines.host.single_address_space = 245 perf_env__single_address_space(session->machines.host.env); 246 247 if (!data || perf_data__is_write(data)) { 248 /* 249 * In O_RDONLY mode this will be performed when reading the 250 * kernel MMAP event, in perf_event__process_mmap(). 251 */ 252 if (perf_session__create_kernel_maps(session) < 0) 253 pr_warning("Cannot read kernel map\n"); 254 } 255 256 /* 257 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is 258 * processed, so evlist__sample_id_all is not meaningful here. 259 */ 260 if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps && 261 tool->ordered_events && !evlist__sample_id_all(session->evlist)) { 262 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); 263 tool->ordered_events = false; 264 } 265 266 return session; 267 268 out_delete: 269 perf_session__delete(session); 270 out: 271 return ERR_PTR(ret); 272 } 273 274 static void perf_session__delete_threads(struct perf_session *session) 275 { 276 machine__delete_threads(&session->machines.host); 277 } 278 279 static void perf_session__release_decomp_events(struct perf_session *session) 280 { 281 struct decomp *next, *decomp; 282 size_t mmap_len; 283 next = session->decomp; 284 do { 285 decomp = next; 286 if (decomp == NULL) 287 break; 288 next = decomp->next; 289 mmap_len = decomp->mmap_len; 290 munmap(decomp, mmap_len); 291 } while (1); 292 } 293 294 void perf_session__delete(struct perf_session *session) 295 { 296 if (session == NULL) 297 return; 298 auxtrace__free(session); 299 auxtrace_index__free(&session->auxtrace_index); 300 perf_session__destroy_kernel_maps(session); 301 perf_session__delete_threads(session); 302 perf_session__release_decomp_events(session); 303 perf_env__exit(&session->header.env); 304 machines__exit(&session->machines); 305 if (session->data) { 306 if (perf_data__is_read(session->data)) 307 evlist__delete(session->evlist); 308 perf_data__close(session->data); 309 } 310 trace_event__cleanup(&session->tevent); 311 free(session); 312 } 313 314 static int process_event_synth_tracing_data_stub(struct perf_session *session 315 __maybe_unused, 316 union perf_event *event 317 __maybe_unused) 318 { 319 dump_printf(": unhandled!\n"); 320 return 0; 321 } 322 323 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused, 324 union perf_event *event __maybe_unused, 325 struct evlist **pevlist 326 __maybe_unused) 327 { 328 dump_printf(": unhandled!\n"); 329 return 0; 330 } 331 332 static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused, 333 union perf_event *event __maybe_unused, 334 struct evlist **pevlist 335 __maybe_unused) 336 { 337 if (dump_trace) 338 perf_event__fprintf_event_update(event, stdout); 339 340 dump_printf(": unhandled!\n"); 341 return 0; 342 } 343 344 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused, 345 union perf_event *event __maybe_unused, 346 struct perf_sample *sample __maybe_unused, 347 struct evsel *evsel __maybe_unused, 348 struct machine *machine __maybe_unused) 349 { 350 dump_printf(": unhandled!\n"); 351 return 0; 352 } 353 354 static int process_event_stub(struct perf_tool *tool __maybe_unused, 355 union perf_event *event __maybe_unused, 356 struct perf_sample *sample __maybe_unused, 357 struct machine *machine __maybe_unused) 358 { 359 dump_printf(": unhandled!\n"); 360 return 0; 361 } 362 363 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused, 364 union perf_event *event __maybe_unused, 365 struct ordered_events *oe __maybe_unused) 366 { 367 dump_printf(": unhandled!\n"); 368 return 0; 369 } 370 371 static int process_finished_round(struct perf_tool *tool, 372 union perf_event *event, 373 struct ordered_events *oe); 374 375 static int skipn(int fd, off_t n) 376 { 377 char buf[4096]; 378 ssize_t ret; 379 380 while (n > 0) { 381 ret = read(fd, buf, min(n, (off_t)sizeof(buf))); 382 if (ret <= 0) 383 return ret; 384 n -= ret; 385 } 386 387 return 0; 388 } 389 390 static s64 process_event_auxtrace_stub(struct perf_session *session __maybe_unused, 391 union perf_event *event) 392 { 393 dump_printf(": unhandled!\n"); 394 if (perf_data__is_pipe(session->data)) 395 skipn(perf_data__fd(session->data), event->auxtrace.size); 396 return event->auxtrace.size; 397 } 398 399 static int process_event_op2_stub(struct perf_session *session __maybe_unused, 400 union perf_event *event __maybe_unused) 401 { 402 dump_printf(": unhandled!\n"); 403 return 0; 404 } 405 406 407 static 408 int process_event_thread_map_stub(struct perf_session *session __maybe_unused, 409 union perf_event *event __maybe_unused) 410 { 411 if (dump_trace) 412 perf_event__fprintf_thread_map(event, stdout); 413 414 dump_printf(": unhandled!\n"); 415 return 0; 416 } 417 418 static 419 int process_event_cpu_map_stub(struct perf_session *session __maybe_unused, 420 union perf_event *event __maybe_unused) 421 { 422 if (dump_trace) 423 perf_event__fprintf_cpu_map(event, stdout); 424 425 dump_printf(": unhandled!\n"); 426 return 0; 427 } 428 429 static 430 int process_event_stat_config_stub(struct perf_session *session __maybe_unused, 431 union perf_event *event __maybe_unused) 432 { 433 if (dump_trace) 434 perf_event__fprintf_stat_config(event, stdout); 435 436 dump_printf(": unhandled!\n"); 437 return 0; 438 } 439 440 static int process_stat_stub(struct perf_session *perf_session __maybe_unused, 441 union perf_event *event) 442 { 443 if (dump_trace) 444 perf_event__fprintf_stat(event, stdout); 445 446 dump_printf(": unhandled!\n"); 447 return 0; 448 } 449 450 static int process_stat_round_stub(struct perf_session *perf_session __maybe_unused, 451 union perf_event *event) 452 { 453 if (dump_trace) 454 perf_event__fprintf_stat_round(event, stdout); 455 456 dump_printf(": unhandled!\n"); 457 return 0; 458 } 459 460 static int process_event_time_conv_stub(struct perf_session *perf_session __maybe_unused, 461 union perf_event *event) 462 { 463 if (dump_trace) 464 perf_event__fprintf_time_conv(event, stdout); 465 466 dump_printf(": unhandled!\n"); 467 return 0; 468 } 469 470 static int perf_session__process_compressed_event_stub(struct perf_session *session __maybe_unused, 471 union perf_event *event __maybe_unused, 472 u64 file_offset __maybe_unused) 473 { 474 dump_printf(": unhandled!\n"); 475 return 0; 476 } 477 478 void perf_tool__fill_defaults(struct perf_tool *tool) 479 { 480 if (tool->sample == NULL) 481 tool->sample = process_event_sample_stub; 482 if (tool->mmap == NULL) 483 tool->mmap = process_event_stub; 484 if (tool->mmap2 == NULL) 485 tool->mmap2 = process_event_stub; 486 if (tool->comm == NULL) 487 tool->comm = process_event_stub; 488 if (tool->namespaces == NULL) 489 tool->namespaces = process_event_stub; 490 if (tool->cgroup == NULL) 491 tool->cgroup = process_event_stub; 492 if (tool->fork == NULL) 493 tool->fork = process_event_stub; 494 if (tool->exit == NULL) 495 tool->exit = process_event_stub; 496 if (tool->lost == NULL) 497 tool->lost = perf_event__process_lost; 498 if (tool->lost_samples == NULL) 499 tool->lost_samples = perf_event__process_lost_samples; 500 if (tool->aux == NULL) 501 tool->aux = perf_event__process_aux; 502 if (tool->itrace_start == NULL) 503 tool->itrace_start = perf_event__process_itrace_start; 504 if (tool->context_switch == NULL) 505 tool->context_switch = perf_event__process_switch; 506 if (tool->ksymbol == NULL) 507 tool->ksymbol = perf_event__process_ksymbol; 508 if (tool->bpf == NULL) 509 tool->bpf = perf_event__process_bpf; 510 if (tool->text_poke == NULL) 511 tool->text_poke = perf_event__process_text_poke; 512 if (tool->read == NULL) 513 tool->read = process_event_sample_stub; 514 if (tool->throttle == NULL) 515 tool->throttle = process_event_stub; 516 if (tool->unthrottle == NULL) 517 tool->unthrottle = process_event_stub; 518 if (tool->attr == NULL) 519 tool->attr = process_event_synth_attr_stub; 520 if (tool->event_update == NULL) 521 tool->event_update = process_event_synth_event_update_stub; 522 if (tool->tracing_data == NULL) 523 tool->tracing_data = process_event_synth_tracing_data_stub; 524 if (tool->build_id == NULL) 525 tool->build_id = process_event_op2_stub; 526 if (tool->finished_round == NULL) { 527 if (tool->ordered_events) 528 tool->finished_round = process_finished_round; 529 else 530 tool->finished_round = process_finished_round_stub; 531 } 532 if (tool->id_index == NULL) 533 tool->id_index = process_event_op2_stub; 534 if (tool->auxtrace_info == NULL) 535 tool->auxtrace_info = process_event_op2_stub; 536 if (tool->auxtrace == NULL) 537 tool->auxtrace = process_event_auxtrace_stub; 538 if (tool->auxtrace_error == NULL) 539 tool->auxtrace_error = process_event_op2_stub; 540 if (tool->thread_map == NULL) 541 tool->thread_map = process_event_thread_map_stub; 542 if (tool->cpu_map == NULL) 543 tool->cpu_map = process_event_cpu_map_stub; 544 if (tool->stat_config == NULL) 545 tool->stat_config = process_event_stat_config_stub; 546 if (tool->stat == NULL) 547 tool->stat = process_stat_stub; 548 if (tool->stat_round == NULL) 549 tool->stat_round = process_stat_round_stub; 550 if (tool->time_conv == NULL) 551 tool->time_conv = process_event_time_conv_stub; 552 if (tool->feature == NULL) 553 tool->feature = process_event_op2_stub; 554 if (tool->compressed == NULL) 555 tool->compressed = perf_session__process_compressed_event; 556 } 557 558 static void swap_sample_id_all(union perf_event *event, void *data) 559 { 560 void *end = (void *) event + event->header.size; 561 int size = end - data; 562 563 BUG_ON(size % sizeof(u64)); 564 mem_bswap_64(data, size); 565 } 566 567 static void perf_event__all64_swap(union perf_event *event, 568 bool sample_id_all __maybe_unused) 569 { 570 struct perf_event_header *hdr = &event->header; 571 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 572 } 573 574 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 575 { 576 event->comm.pid = bswap_32(event->comm.pid); 577 event->comm.tid = bswap_32(event->comm.tid); 578 579 if (sample_id_all) { 580 void *data = &event->comm.comm; 581 582 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 583 swap_sample_id_all(event, data); 584 } 585 } 586 587 static void perf_event__mmap_swap(union perf_event *event, 588 bool sample_id_all) 589 { 590 event->mmap.pid = bswap_32(event->mmap.pid); 591 event->mmap.tid = bswap_32(event->mmap.tid); 592 event->mmap.start = bswap_64(event->mmap.start); 593 event->mmap.len = bswap_64(event->mmap.len); 594 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 595 596 if (sample_id_all) { 597 void *data = &event->mmap.filename; 598 599 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 600 swap_sample_id_all(event, data); 601 } 602 } 603 604 static void perf_event__mmap2_swap(union perf_event *event, 605 bool sample_id_all) 606 { 607 event->mmap2.pid = bswap_32(event->mmap2.pid); 608 event->mmap2.tid = bswap_32(event->mmap2.tid); 609 event->mmap2.start = bswap_64(event->mmap2.start); 610 event->mmap2.len = bswap_64(event->mmap2.len); 611 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); 612 613 if (!(event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID)) { 614 event->mmap2.maj = bswap_32(event->mmap2.maj); 615 event->mmap2.min = bswap_32(event->mmap2.min); 616 event->mmap2.ino = bswap_64(event->mmap2.ino); 617 event->mmap2.ino_generation = bswap_64(event->mmap2.ino_generation); 618 } 619 620 if (sample_id_all) { 621 void *data = &event->mmap2.filename; 622 623 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 624 swap_sample_id_all(event, data); 625 } 626 } 627 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 628 { 629 event->fork.pid = bswap_32(event->fork.pid); 630 event->fork.tid = bswap_32(event->fork.tid); 631 event->fork.ppid = bswap_32(event->fork.ppid); 632 event->fork.ptid = bswap_32(event->fork.ptid); 633 event->fork.time = bswap_64(event->fork.time); 634 635 if (sample_id_all) 636 swap_sample_id_all(event, &event->fork + 1); 637 } 638 639 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 640 { 641 event->read.pid = bswap_32(event->read.pid); 642 event->read.tid = bswap_32(event->read.tid); 643 event->read.value = bswap_64(event->read.value); 644 event->read.time_enabled = bswap_64(event->read.time_enabled); 645 event->read.time_running = bswap_64(event->read.time_running); 646 event->read.id = bswap_64(event->read.id); 647 648 if (sample_id_all) 649 swap_sample_id_all(event, &event->read + 1); 650 } 651 652 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all) 653 { 654 event->aux.aux_offset = bswap_64(event->aux.aux_offset); 655 event->aux.aux_size = bswap_64(event->aux.aux_size); 656 event->aux.flags = bswap_64(event->aux.flags); 657 658 if (sample_id_all) 659 swap_sample_id_all(event, &event->aux + 1); 660 } 661 662 static void perf_event__itrace_start_swap(union perf_event *event, 663 bool sample_id_all) 664 { 665 event->itrace_start.pid = bswap_32(event->itrace_start.pid); 666 event->itrace_start.tid = bswap_32(event->itrace_start.tid); 667 668 if (sample_id_all) 669 swap_sample_id_all(event, &event->itrace_start + 1); 670 } 671 672 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all) 673 { 674 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) { 675 event->context_switch.next_prev_pid = 676 bswap_32(event->context_switch.next_prev_pid); 677 event->context_switch.next_prev_tid = 678 bswap_32(event->context_switch.next_prev_tid); 679 } 680 681 if (sample_id_all) 682 swap_sample_id_all(event, &event->context_switch + 1); 683 } 684 685 static void perf_event__text_poke_swap(union perf_event *event, bool sample_id_all) 686 { 687 event->text_poke.addr = bswap_64(event->text_poke.addr); 688 event->text_poke.old_len = bswap_16(event->text_poke.old_len); 689 event->text_poke.new_len = bswap_16(event->text_poke.new_len); 690 691 if (sample_id_all) { 692 size_t len = sizeof(event->text_poke.old_len) + 693 sizeof(event->text_poke.new_len) + 694 event->text_poke.old_len + 695 event->text_poke.new_len; 696 void *data = &event->text_poke.old_len; 697 698 data += PERF_ALIGN(len, sizeof(u64)); 699 swap_sample_id_all(event, data); 700 } 701 } 702 703 static void perf_event__throttle_swap(union perf_event *event, 704 bool sample_id_all) 705 { 706 event->throttle.time = bswap_64(event->throttle.time); 707 event->throttle.id = bswap_64(event->throttle.id); 708 event->throttle.stream_id = bswap_64(event->throttle.stream_id); 709 710 if (sample_id_all) 711 swap_sample_id_all(event, &event->throttle + 1); 712 } 713 714 static void perf_event__namespaces_swap(union perf_event *event, 715 bool sample_id_all) 716 { 717 u64 i; 718 719 event->namespaces.pid = bswap_32(event->namespaces.pid); 720 event->namespaces.tid = bswap_32(event->namespaces.tid); 721 event->namespaces.nr_namespaces = bswap_64(event->namespaces.nr_namespaces); 722 723 for (i = 0; i < event->namespaces.nr_namespaces; i++) { 724 struct perf_ns_link_info *ns = &event->namespaces.link_info[i]; 725 726 ns->dev = bswap_64(ns->dev); 727 ns->ino = bswap_64(ns->ino); 728 } 729 730 if (sample_id_all) 731 swap_sample_id_all(event, &event->namespaces.link_info[i]); 732 } 733 734 static void perf_event__cgroup_swap(union perf_event *event, bool sample_id_all) 735 { 736 event->cgroup.id = bswap_64(event->cgroup.id); 737 738 if (sample_id_all) { 739 void *data = &event->cgroup.path; 740 741 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 742 swap_sample_id_all(event, data); 743 } 744 } 745 746 static u8 revbyte(u8 b) 747 { 748 int rev = (b >> 4) | ((b & 0xf) << 4); 749 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 750 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 751 return (u8) rev; 752 } 753 754 /* 755 * XXX this is hack in attempt to carry flags bitfield 756 * through endian village. ABI says: 757 * 758 * Bit-fields are allocated from right to left (least to most significant) 759 * on little-endian implementations and from left to right (most to least 760 * significant) on big-endian implementations. 761 * 762 * The above seems to be byte specific, so we need to reverse each 763 * byte of the bitfield. 'Internet' also says this might be implementation 764 * specific and we probably need proper fix and carry perf_event_attr 765 * bitfield flags in separate data file FEAT_ section. Thought this seems 766 * to work for now. 767 */ 768 static void swap_bitfield(u8 *p, unsigned len) 769 { 770 unsigned i; 771 772 for (i = 0; i < len; i++) { 773 *p = revbyte(*p); 774 p++; 775 } 776 } 777 778 /* exported for swapping attributes in file header */ 779 void perf_event__attr_swap(struct perf_event_attr *attr) 780 { 781 attr->type = bswap_32(attr->type); 782 attr->size = bswap_32(attr->size); 783 784 #define bswap_safe(f, n) \ 785 (attr->size > (offsetof(struct perf_event_attr, f) + \ 786 sizeof(attr->f) * (n))) 787 #define bswap_field(f, sz) \ 788 do { \ 789 if (bswap_safe(f, 0)) \ 790 attr->f = bswap_##sz(attr->f); \ 791 } while(0) 792 #define bswap_field_16(f) bswap_field(f, 16) 793 #define bswap_field_32(f) bswap_field(f, 32) 794 #define bswap_field_64(f) bswap_field(f, 64) 795 796 bswap_field_64(config); 797 bswap_field_64(sample_period); 798 bswap_field_64(sample_type); 799 bswap_field_64(read_format); 800 bswap_field_32(wakeup_events); 801 bswap_field_32(bp_type); 802 bswap_field_64(bp_addr); 803 bswap_field_64(bp_len); 804 bswap_field_64(branch_sample_type); 805 bswap_field_64(sample_regs_user); 806 bswap_field_32(sample_stack_user); 807 bswap_field_32(aux_watermark); 808 bswap_field_16(sample_max_stack); 809 bswap_field_32(aux_sample_size); 810 811 /* 812 * After read_format are bitfields. Check read_format because 813 * we are unable to use offsetof on bitfield. 814 */ 815 if (bswap_safe(read_format, 1)) 816 swap_bitfield((u8 *) (&attr->read_format + 1), 817 sizeof(u64)); 818 #undef bswap_field_64 819 #undef bswap_field_32 820 #undef bswap_field 821 #undef bswap_safe 822 } 823 824 static void perf_event__hdr_attr_swap(union perf_event *event, 825 bool sample_id_all __maybe_unused) 826 { 827 size_t size; 828 829 perf_event__attr_swap(&event->attr.attr); 830 831 size = event->header.size; 832 size -= (void *)&event->attr.id - (void *)event; 833 mem_bswap_64(event->attr.id, size); 834 } 835 836 static void perf_event__event_update_swap(union perf_event *event, 837 bool sample_id_all __maybe_unused) 838 { 839 event->event_update.type = bswap_64(event->event_update.type); 840 event->event_update.id = bswap_64(event->event_update.id); 841 } 842 843 static void perf_event__event_type_swap(union perf_event *event, 844 bool sample_id_all __maybe_unused) 845 { 846 event->event_type.event_type.event_id = 847 bswap_64(event->event_type.event_type.event_id); 848 } 849 850 static void perf_event__tracing_data_swap(union perf_event *event, 851 bool sample_id_all __maybe_unused) 852 { 853 event->tracing_data.size = bswap_32(event->tracing_data.size); 854 } 855 856 static void perf_event__auxtrace_info_swap(union perf_event *event, 857 bool sample_id_all __maybe_unused) 858 { 859 size_t size; 860 861 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type); 862 863 size = event->header.size; 864 size -= (void *)&event->auxtrace_info.priv - (void *)event; 865 mem_bswap_64(event->auxtrace_info.priv, size); 866 } 867 868 static void perf_event__auxtrace_swap(union perf_event *event, 869 bool sample_id_all __maybe_unused) 870 { 871 event->auxtrace.size = bswap_64(event->auxtrace.size); 872 event->auxtrace.offset = bswap_64(event->auxtrace.offset); 873 event->auxtrace.reference = bswap_64(event->auxtrace.reference); 874 event->auxtrace.idx = bswap_32(event->auxtrace.idx); 875 event->auxtrace.tid = bswap_32(event->auxtrace.tid); 876 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu); 877 } 878 879 static void perf_event__auxtrace_error_swap(union perf_event *event, 880 bool sample_id_all __maybe_unused) 881 { 882 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type); 883 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code); 884 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu); 885 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid); 886 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid); 887 event->auxtrace_error.fmt = bswap_32(event->auxtrace_error.fmt); 888 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip); 889 if (event->auxtrace_error.fmt) 890 event->auxtrace_error.time = bswap_64(event->auxtrace_error.time); 891 } 892 893 static void perf_event__thread_map_swap(union perf_event *event, 894 bool sample_id_all __maybe_unused) 895 { 896 unsigned i; 897 898 event->thread_map.nr = bswap_64(event->thread_map.nr); 899 900 for (i = 0; i < event->thread_map.nr; i++) 901 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid); 902 } 903 904 static void perf_event__cpu_map_swap(union perf_event *event, 905 bool sample_id_all __maybe_unused) 906 { 907 struct perf_record_cpu_map_data *data = &event->cpu_map.data; 908 struct cpu_map_entries *cpus; 909 struct perf_record_record_cpu_map *mask; 910 unsigned i; 911 912 data->type = bswap_16(data->type); 913 914 switch (data->type) { 915 case PERF_CPU_MAP__CPUS: 916 cpus = (struct cpu_map_entries *)data->data; 917 918 cpus->nr = bswap_16(cpus->nr); 919 920 for (i = 0; i < cpus->nr; i++) 921 cpus->cpu[i] = bswap_16(cpus->cpu[i]); 922 break; 923 case PERF_CPU_MAP__MASK: 924 mask = (struct perf_record_record_cpu_map *)data->data; 925 926 mask->nr = bswap_16(mask->nr); 927 mask->long_size = bswap_16(mask->long_size); 928 929 switch (mask->long_size) { 930 case 4: mem_bswap_32(&mask->mask, mask->nr); break; 931 case 8: mem_bswap_64(&mask->mask, mask->nr); break; 932 default: 933 pr_err("cpu_map swap: unsupported long size\n"); 934 } 935 default: 936 break; 937 } 938 } 939 940 static void perf_event__stat_config_swap(union perf_event *event, 941 bool sample_id_all __maybe_unused) 942 { 943 u64 size; 944 945 size = bswap_64(event->stat_config.nr) * sizeof(event->stat_config.data[0]); 946 size += 1; /* nr item itself */ 947 mem_bswap_64(&event->stat_config.nr, size); 948 } 949 950 static void perf_event__stat_swap(union perf_event *event, 951 bool sample_id_all __maybe_unused) 952 { 953 event->stat.id = bswap_64(event->stat.id); 954 event->stat.thread = bswap_32(event->stat.thread); 955 event->stat.cpu = bswap_32(event->stat.cpu); 956 event->stat.val = bswap_64(event->stat.val); 957 event->stat.ena = bswap_64(event->stat.ena); 958 event->stat.run = bswap_64(event->stat.run); 959 } 960 961 static void perf_event__stat_round_swap(union perf_event *event, 962 bool sample_id_all __maybe_unused) 963 { 964 event->stat_round.type = bswap_64(event->stat_round.type); 965 event->stat_round.time = bswap_64(event->stat_round.time); 966 } 967 968 static void perf_event__time_conv_swap(union perf_event *event, 969 bool sample_id_all __maybe_unused) 970 { 971 event->time_conv.time_shift = bswap_64(event->time_conv.time_shift); 972 event->time_conv.time_mult = bswap_64(event->time_conv.time_mult); 973 event->time_conv.time_zero = bswap_64(event->time_conv.time_zero); 974 975 if (event_contains(event->time_conv, time_cycles)) { 976 event->time_conv.time_cycles = bswap_64(event->time_conv.time_cycles); 977 event->time_conv.time_mask = bswap_64(event->time_conv.time_mask); 978 } 979 } 980 981 typedef void (*perf_event__swap_op)(union perf_event *event, 982 bool sample_id_all); 983 984 static perf_event__swap_op perf_event__swap_ops[] = { 985 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 986 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap, 987 [PERF_RECORD_COMM] = perf_event__comm_swap, 988 [PERF_RECORD_FORK] = perf_event__task_swap, 989 [PERF_RECORD_EXIT] = perf_event__task_swap, 990 [PERF_RECORD_LOST] = perf_event__all64_swap, 991 [PERF_RECORD_READ] = perf_event__read_swap, 992 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap, 993 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap, 994 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 995 [PERF_RECORD_AUX] = perf_event__aux_swap, 996 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap, 997 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap, 998 [PERF_RECORD_SWITCH] = perf_event__switch_swap, 999 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap, 1000 [PERF_RECORD_NAMESPACES] = perf_event__namespaces_swap, 1001 [PERF_RECORD_CGROUP] = perf_event__cgroup_swap, 1002 [PERF_RECORD_TEXT_POKE] = perf_event__text_poke_swap, 1003 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 1004 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 1005 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 1006 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 1007 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap, 1008 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap, 1009 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap, 1010 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap, 1011 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap, 1012 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap, 1013 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap, 1014 [PERF_RECORD_STAT] = perf_event__stat_swap, 1015 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap, 1016 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap, 1017 [PERF_RECORD_TIME_CONV] = perf_event__time_conv_swap, 1018 [PERF_RECORD_HEADER_MAX] = NULL, 1019 }; 1020 1021 /* 1022 * When perf record finishes a pass on every buffers, it records this pseudo 1023 * event. 1024 * We record the max timestamp t found in the pass n. 1025 * Assuming these timestamps are monotonic across cpus, we know that if 1026 * a buffer still has events with timestamps below t, they will be all 1027 * available and then read in the pass n + 1. 1028 * Hence when we start to read the pass n + 2, we can safely flush every 1029 * events with timestamps below t. 1030 * 1031 * ============ PASS n ================= 1032 * CPU 0 | CPU 1 1033 * | 1034 * cnt1 timestamps | cnt2 timestamps 1035 * 1 | 2 1036 * 2 | 3 1037 * - | 4 <--- max recorded 1038 * 1039 * ============ PASS n + 1 ============== 1040 * CPU 0 | CPU 1 1041 * | 1042 * cnt1 timestamps | cnt2 timestamps 1043 * 3 | 5 1044 * 4 | 6 1045 * 5 | 7 <---- max recorded 1046 * 1047 * Flush every events below timestamp 4 1048 * 1049 * ============ PASS n + 2 ============== 1050 * CPU 0 | CPU 1 1051 * | 1052 * cnt1 timestamps | cnt2 timestamps 1053 * 6 | 8 1054 * 7 | 9 1055 * - | 10 1056 * 1057 * Flush every events below timestamp 7 1058 * etc... 1059 */ 1060 static int process_finished_round(struct perf_tool *tool __maybe_unused, 1061 union perf_event *event __maybe_unused, 1062 struct ordered_events *oe) 1063 { 1064 if (dump_trace) 1065 fprintf(stdout, "\n"); 1066 return ordered_events__flush(oe, OE_FLUSH__ROUND); 1067 } 1068 1069 int perf_session__queue_event(struct perf_session *s, union perf_event *event, 1070 u64 timestamp, u64 file_offset) 1071 { 1072 return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset); 1073 } 1074 1075 static void callchain__lbr_callstack_printf(struct perf_sample *sample) 1076 { 1077 struct ip_callchain *callchain = sample->callchain; 1078 struct branch_stack *lbr_stack = sample->branch_stack; 1079 struct branch_entry *entries = perf_sample__branch_entries(sample); 1080 u64 kernel_callchain_nr = callchain->nr; 1081 unsigned int i; 1082 1083 for (i = 0; i < kernel_callchain_nr; i++) { 1084 if (callchain->ips[i] == PERF_CONTEXT_USER) 1085 break; 1086 } 1087 1088 if ((i != kernel_callchain_nr) && lbr_stack->nr) { 1089 u64 total_nr; 1090 /* 1091 * LBR callstack can only get user call chain, 1092 * i is kernel call chain number, 1093 * 1 is PERF_CONTEXT_USER. 1094 * 1095 * The user call chain is stored in LBR registers. 1096 * LBR are pair registers. The caller is stored 1097 * in "from" register, while the callee is stored 1098 * in "to" register. 1099 * For example, there is a call stack 1100 * "A"->"B"->"C"->"D". 1101 * The LBR registers will be recorded like 1102 * "C"->"D", "B"->"C", "A"->"B". 1103 * So only the first "to" register and all "from" 1104 * registers are needed to construct the whole stack. 1105 */ 1106 total_nr = i + 1 + lbr_stack->nr + 1; 1107 kernel_callchain_nr = i + 1; 1108 1109 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr); 1110 1111 for (i = 0; i < kernel_callchain_nr; i++) 1112 printf("..... %2d: %016" PRIx64 "\n", 1113 i, callchain->ips[i]); 1114 1115 printf("..... %2d: %016" PRIx64 "\n", 1116 (int)(kernel_callchain_nr), entries[0].to); 1117 for (i = 0; i < lbr_stack->nr; i++) 1118 printf("..... %2d: %016" PRIx64 "\n", 1119 (int)(i + kernel_callchain_nr + 1), entries[i].from); 1120 } 1121 } 1122 1123 static void callchain__printf(struct evsel *evsel, 1124 struct perf_sample *sample) 1125 { 1126 unsigned int i; 1127 struct ip_callchain *callchain = sample->callchain; 1128 1129 if (evsel__has_branch_callstack(evsel)) 1130 callchain__lbr_callstack_printf(sample); 1131 1132 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr); 1133 1134 for (i = 0; i < callchain->nr; i++) 1135 printf("..... %2d: %016" PRIx64 "\n", 1136 i, callchain->ips[i]); 1137 } 1138 1139 static void branch_stack__printf(struct perf_sample *sample, bool callstack) 1140 { 1141 struct branch_entry *entries = perf_sample__branch_entries(sample); 1142 uint64_t i; 1143 1144 printf("%s: nr:%" PRIu64 "\n", 1145 !callstack ? "... branch stack" : "... branch callstack", 1146 sample->branch_stack->nr); 1147 1148 for (i = 0; i < sample->branch_stack->nr; i++) { 1149 struct branch_entry *e = &entries[i]; 1150 1151 if (!callstack) { 1152 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n", 1153 i, e->from, e->to, 1154 (unsigned short)e->flags.cycles, 1155 e->flags.mispred ? "M" : " ", 1156 e->flags.predicted ? "P" : " ", 1157 e->flags.abort ? "A" : " ", 1158 e->flags.in_tx ? "T" : " ", 1159 (unsigned)e->flags.reserved); 1160 } else { 1161 printf("..... %2"PRIu64": %016" PRIx64 "\n", 1162 i, i > 0 ? e->from : e->to); 1163 } 1164 } 1165 } 1166 1167 static void regs_dump__printf(u64 mask, u64 *regs) 1168 { 1169 unsigned rid, i = 0; 1170 1171 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { 1172 u64 val = regs[i++]; 1173 1174 printf(".... %-5s 0x%016" PRIx64 "\n", 1175 perf_reg_name(rid), val); 1176 } 1177 } 1178 1179 static const char *regs_abi[] = { 1180 [PERF_SAMPLE_REGS_ABI_NONE] = "none", 1181 [PERF_SAMPLE_REGS_ABI_32] = "32-bit", 1182 [PERF_SAMPLE_REGS_ABI_64] = "64-bit", 1183 }; 1184 1185 static inline const char *regs_dump_abi(struct regs_dump *d) 1186 { 1187 if (d->abi > PERF_SAMPLE_REGS_ABI_64) 1188 return "unknown"; 1189 1190 return regs_abi[d->abi]; 1191 } 1192 1193 static void regs__printf(const char *type, struct regs_dump *regs) 1194 { 1195 u64 mask = regs->mask; 1196 1197 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n", 1198 type, 1199 mask, 1200 regs_dump_abi(regs)); 1201 1202 regs_dump__printf(mask, regs->regs); 1203 } 1204 1205 static void regs_user__printf(struct perf_sample *sample) 1206 { 1207 struct regs_dump *user_regs = &sample->user_regs; 1208 1209 if (user_regs->regs) 1210 regs__printf("user", user_regs); 1211 } 1212 1213 static void regs_intr__printf(struct perf_sample *sample) 1214 { 1215 struct regs_dump *intr_regs = &sample->intr_regs; 1216 1217 if (intr_regs->regs) 1218 regs__printf("intr", intr_regs); 1219 } 1220 1221 static void stack_user__printf(struct stack_dump *dump) 1222 { 1223 printf("... ustack: size %" PRIu64 ", offset 0x%x\n", 1224 dump->size, dump->offset); 1225 } 1226 1227 static void evlist__print_tstamp(struct evlist *evlist, union perf_event *event, struct perf_sample *sample) 1228 { 1229 u64 sample_type = __evlist__combined_sample_type(evlist); 1230 1231 if (event->header.type != PERF_RECORD_SAMPLE && 1232 !evlist__sample_id_all(evlist)) { 1233 fputs("-1 -1 ", stdout); 1234 return; 1235 } 1236 1237 if ((sample_type & PERF_SAMPLE_CPU)) 1238 printf("%u ", sample->cpu); 1239 1240 if (sample_type & PERF_SAMPLE_TIME) 1241 printf("%" PRIu64 " ", sample->time); 1242 } 1243 1244 static void sample_read__printf(struct perf_sample *sample, u64 read_format) 1245 { 1246 printf("... sample_read:\n"); 1247 1248 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1249 printf("...... time enabled %016" PRIx64 "\n", 1250 sample->read.time_enabled); 1251 1252 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1253 printf("...... time running %016" PRIx64 "\n", 1254 sample->read.time_running); 1255 1256 if (read_format & PERF_FORMAT_GROUP) { 1257 u64 i; 1258 1259 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr); 1260 1261 for (i = 0; i < sample->read.group.nr; i++) { 1262 struct sample_read_value *value; 1263 1264 value = &sample->read.group.values[i]; 1265 printf("..... id %016" PRIx64 1266 ", value %016" PRIx64 "\n", 1267 value->id, value->value); 1268 } 1269 } else 1270 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n", 1271 sample->read.one.id, sample->read.one.value); 1272 } 1273 1274 static void dump_event(struct evlist *evlist, union perf_event *event, 1275 u64 file_offset, struct perf_sample *sample) 1276 { 1277 if (!dump_trace) 1278 return; 1279 1280 printf("\n%#" PRIx64 " [%#x]: event: %d\n", 1281 file_offset, event->header.size, event->header.type); 1282 1283 trace_event(event); 1284 if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw) 1285 evlist->trace_event_sample_raw(evlist, event, sample); 1286 1287 if (sample) 1288 evlist__print_tstamp(evlist, event, sample); 1289 1290 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 1291 event->header.size, perf_event__name(event->header.type)); 1292 } 1293 1294 char *get_page_size_name(u64 size, char *str) 1295 { 1296 if (!size || !unit_number__scnprintf(str, PAGE_SIZE_NAME_LEN, size)) 1297 snprintf(str, PAGE_SIZE_NAME_LEN, "%s", "N/A"); 1298 1299 return str; 1300 } 1301 1302 static void dump_sample(struct evsel *evsel, union perf_event *event, 1303 struct perf_sample *sample) 1304 { 1305 u64 sample_type; 1306 char str[PAGE_SIZE_NAME_LEN]; 1307 1308 if (!dump_trace) 1309 return; 1310 1311 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 1312 event->header.misc, sample->pid, sample->tid, sample->ip, 1313 sample->period, sample->addr); 1314 1315 sample_type = evsel->core.attr.sample_type; 1316 1317 if (evsel__has_callchain(evsel)) 1318 callchain__printf(evsel, sample); 1319 1320 if (evsel__has_br_stack(evsel)) 1321 branch_stack__printf(sample, evsel__has_branch_callstack(evsel)); 1322 1323 if (sample_type & PERF_SAMPLE_REGS_USER) 1324 regs_user__printf(sample); 1325 1326 if (sample_type & PERF_SAMPLE_REGS_INTR) 1327 regs_intr__printf(sample); 1328 1329 if (sample_type & PERF_SAMPLE_STACK_USER) 1330 stack_user__printf(&sample->user_stack); 1331 1332 if (sample_type & PERF_SAMPLE_WEIGHT_TYPE) { 1333 printf("... weight: %" PRIu64 "", sample->weight); 1334 if (sample_type & PERF_SAMPLE_WEIGHT_STRUCT) { 1335 printf(",0x%"PRIx16"", sample->ins_lat); 1336 printf(",0x%"PRIx16"", sample->p_stage_cyc); 1337 } 1338 printf("\n"); 1339 } 1340 1341 if (sample_type & PERF_SAMPLE_DATA_SRC) 1342 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src); 1343 1344 if (sample_type & PERF_SAMPLE_PHYS_ADDR) 1345 printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr); 1346 1347 if (sample_type & PERF_SAMPLE_DATA_PAGE_SIZE) 1348 printf(" .. data page size: %s\n", get_page_size_name(sample->data_page_size, str)); 1349 1350 if (sample_type & PERF_SAMPLE_CODE_PAGE_SIZE) 1351 printf(" .. code page size: %s\n", get_page_size_name(sample->code_page_size, str)); 1352 1353 if (sample_type & PERF_SAMPLE_TRANSACTION) 1354 printf("... transaction: %" PRIx64 "\n", sample->transaction); 1355 1356 if (sample_type & PERF_SAMPLE_READ) 1357 sample_read__printf(sample, evsel->core.attr.read_format); 1358 } 1359 1360 static void dump_read(struct evsel *evsel, union perf_event *event) 1361 { 1362 struct perf_record_read *read_event = &event->read; 1363 u64 read_format; 1364 1365 if (!dump_trace) 1366 return; 1367 1368 printf(": %d %d %s %" PRI_lu64 "\n", event->read.pid, event->read.tid, 1369 evsel__name(evsel), event->read.value); 1370 1371 if (!evsel) 1372 return; 1373 1374 read_format = evsel->core.attr.read_format; 1375 1376 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1377 printf("... time enabled : %" PRI_lu64 "\n", read_event->time_enabled); 1378 1379 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1380 printf("... time running : %" PRI_lu64 "\n", read_event->time_running); 1381 1382 if (read_format & PERF_FORMAT_ID) 1383 printf("... id : %" PRI_lu64 "\n", read_event->id); 1384 } 1385 1386 static struct machine *machines__find_for_cpumode(struct machines *machines, 1387 union perf_event *event, 1388 struct perf_sample *sample) 1389 { 1390 if (perf_guest && 1391 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 1392 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) { 1393 u32 pid; 1394 1395 if (event->header.type == PERF_RECORD_MMAP 1396 || event->header.type == PERF_RECORD_MMAP2) 1397 pid = event->mmap.pid; 1398 else 1399 pid = sample->pid; 1400 1401 return machines__find_guest(machines, pid); 1402 } 1403 1404 return &machines->host; 1405 } 1406 1407 static int deliver_sample_value(struct evlist *evlist, 1408 struct perf_tool *tool, 1409 union perf_event *event, 1410 struct perf_sample *sample, 1411 struct sample_read_value *v, 1412 struct machine *machine) 1413 { 1414 struct perf_sample_id *sid = evlist__id2sid(evlist, v->id); 1415 struct evsel *evsel; 1416 1417 if (sid) { 1418 sample->id = v->id; 1419 sample->period = v->value - sid->period; 1420 sid->period = v->value; 1421 } 1422 1423 if (!sid || sid->evsel == NULL) { 1424 ++evlist->stats.nr_unknown_id; 1425 return 0; 1426 } 1427 1428 /* 1429 * There's no reason to deliver sample 1430 * for zero period, bail out. 1431 */ 1432 if (!sample->period) 1433 return 0; 1434 1435 evsel = container_of(sid->evsel, struct evsel, core); 1436 return tool->sample(tool, event, sample, evsel, machine); 1437 } 1438 1439 static int deliver_sample_group(struct evlist *evlist, 1440 struct perf_tool *tool, 1441 union perf_event *event, 1442 struct perf_sample *sample, 1443 struct machine *machine) 1444 { 1445 int ret = -EINVAL; 1446 u64 i; 1447 1448 for (i = 0; i < sample->read.group.nr; i++) { 1449 ret = deliver_sample_value(evlist, tool, event, sample, 1450 &sample->read.group.values[i], 1451 machine); 1452 if (ret) 1453 break; 1454 } 1455 1456 return ret; 1457 } 1458 1459 static int evlist__deliver_sample(struct evlist *evlist, struct perf_tool *tool, 1460 union perf_event *event, struct perf_sample *sample, 1461 struct evsel *evsel, struct machine *machine) 1462 { 1463 /* We know evsel != NULL. */ 1464 u64 sample_type = evsel->core.attr.sample_type; 1465 u64 read_format = evsel->core.attr.read_format; 1466 1467 /* Standard sample delivery. */ 1468 if (!(sample_type & PERF_SAMPLE_READ)) 1469 return tool->sample(tool, event, sample, evsel, machine); 1470 1471 /* For PERF_SAMPLE_READ we have either single or group mode. */ 1472 if (read_format & PERF_FORMAT_GROUP) 1473 return deliver_sample_group(evlist, tool, event, sample, 1474 machine); 1475 else 1476 return deliver_sample_value(evlist, tool, event, sample, 1477 &sample->read.one, machine); 1478 } 1479 1480 static int machines__deliver_event(struct machines *machines, 1481 struct evlist *evlist, 1482 union perf_event *event, 1483 struct perf_sample *sample, 1484 struct perf_tool *tool, u64 file_offset) 1485 { 1486 struct evsel *evsel; 1487 struct machine *machine; 1488 1489 dump_event(evlist, event, file_offset, sample); 1490 1491 evsel = evlist__id2evsel(evlist, sample->id); 1492 1493 machine = machines__find_for_cpumode(machines, event, sample); 1494 1495 switch (event->header.type) { 1496 case PERF_RECORD_SAMPLE: 1497 if (evsel == NULL) { 1498 ++evlist->stats.nr_unknown_id; 1499 return 0; 1500 } 1501 dump_sample(evsel, event, sample); 1502 if (machine == NULL) { 1503 ++evlist->stats.nr_unprocessable_samples; 1504 return 0; 1505 } 1506 return evlist__deliver_sample(evlist, tool, event, sample, evsel, machine); 1507 case PERF_RECORD_MMAP: 1508 return tool->mmap(tool, event, sample, machine); 1509 case PERF_RECORD_MMAP2: 1510 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT) 1511 ++evlist->stats.nr_proc_map_timeout; 1512 return tool->mmap2(tool, event, sample, machine); 1513 case PERF_RECORD_COMM: 1514 return tool->comm(tool, event, sample, machine); 1515 case PERF_RECORD_NAMESPACES: 1516 return tool->namespaces(tool, event, sample, machine); 1517 case PERF_RECORD_CGROUP: 1518 return tool->cgroup(tool, event, sample, machine); 1519 case PERF_RECORD_FORK: 1520 return tool->fork(tool, event, sample, machine); 1521 case PERF_RECORD_EXIT: 1522 return tool->exit(tool, event, sample, machine); 1523 case PERF_RECORD_LOST: 1524 if (tool->lost == perf_event__process_lost) 1525 evlist->stats.total_lost += event->lost.lost; 1526 return tool->lost(tool, event, sample, machine); 1527 case PERF_RECORD_LOST_SAMPLES: 1528 if (tool->lost_samples == perf_event__process_lost_samples) 1529 evlist->stats.total_lost_samples += event->lost_samples.lost; 1530 return tool->lost_samples(tool, event, sample, machine); 1531 case PERF_RECORD_READ: 1532 dump_read(evsel, event); 1533 return tool->read(tool, event, sample, evsel, machine); 1534 case PERF_RECORD_THROTTLE: 1535 return tool->throttle(tool, event, sample, machine); 1536 case PERF_RECORD_UNTHROTTLE: 1537 return tool->unthrottle(tool, event, sample, machine); 1538 case PERF_RECORD_AUX: 1539 if (tool->aux == perf_event__process_aux) { 1540 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) 1541 evlist->stats.total_aux_lost += 1; 1542 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL) 1543 evlist->stats.total_aux_partial += 1; 1544 } 1545 return tool->aux(tool, event, sample, machine); 1546 case PERF_RECORD_ITRACE_START: 1547 return tool->itrace_start(tool, event, sample, machine); 1548 case PERF_RECORD_SWITCH: 1549 case PERF_RECORD_SWITCH_CPU_WIDE: 1550 return tool->context_switch(tool, event, sample, machine); 1551 case PERF_RECORD_KSYMBOL: 1552 return tool->ksymbol(tool, event, sample, machine); 1553 case PERF_RECORD_BPF_EVENT: 1554 return tool->bpf(tool, event, sample, machine); 1555 case PERF_RECORD_TEXT_POKE: 1556 return tool->text_poke(tool, event, sample, machine); 1557 default: 1558 ++evlist->stats.nr_unknown_events; 1559 return -1; 1560 } 1561 } 1562 1563 static int perf_session__deliver_event(struct perf_session *session, 1564 union perf_event *event, 1565 struct perf_tool *tool, 1566 u64 file_offset) 1567 { 1568 struct perf_sample sample; 1569 int ret = evlist__parse_sample(session->evlist, event, &sample); 1570 1571 if (ret) { 1572 pr_err("Can't parse sample, err = %d\n", ret); 1573 return ret; 1574 } 1575 1576 ret = auxtrace__process_event(session, event, &sample, tool); 1577 if (ret < 0) 1578 return ret; 1579 if (ret > 0) 1580 return 0; 1581 1582 ret = machines__deliver_event(&session->machines, session->evlist, 1583 event, &sample, tool, file_offset); 1584 1585 if (dump_trace && sample.aux_sample.size) 1586 auxtrace__dump_auxtrace_sample(session, &sample); 1587 1588 return ret; 1589 } 1590 1591 static s64 perf_session__process_user_event(struct perf_session *session, 1592 union perf_event *event, 1593 u64 file_offset) 1594 { 1595 struct ordered_events *oe = &session->ordered_events; 1596 struct perf_tool *tool = session->tool; 1597 struct perf_sample sample = { .time = 0, }; 1598 int fd = perf_data__fd(session->data); 1599 int err; 1600 1601 if (event->header.type != PERF_RECORD_COMPRESSED || 1602 tool->compressed == perf_session__process_compressed_event_stub) 1603 dump_event(session->evlist, event, file_offset, &sample); 1604 1605 /* These events are processed right away */ 1606 switch (event->header.type) { 1607 case PERF_RECORD_HEADER_ATTR: 1608 err = tool->attr(tool, event, &session->evlist); 1609 if (err == 0) { 1610 perf_session__set_id_hdr_size(session); 1611 perf_session__set_comm_exec(session); 1612 } 1613 return err; 1614 case PERF_RECORD_EVENT_UPDATE: 1615 return tool->event_update(tool, event, &session->evlist); 1616 case PERF_RECORD_HEADER_EVENT_TYPE: 1617 /* 1618 * Deprecated, but we need to handle it for sake 1619 * of old data files create in pipe mode. 1620 */ 1621 return 0; 1622 case PERF_RECORD_HEADER_TRACING_DATA: 1623 /* 1624 * Setup for reading amidst mmap, but only when we 1625 * are in 'file' mode. The 'pipe' fd is in proper 1626 * place already. 1627 */ 1628 if (!perf_data__is_pipe(session->data)) 1629 lseek(fd, file_offset, SEEK_SET); 1630 return tool->tracing_data(session, event); 1631 case PERF_RECORD_HEADER_BUILD_ID: 1632 return tool->build_id(session, event); 1633 case PERF_RECORD_FINISHED_ROUND: 1634 return tool->finished_round(tool, event, oe); 1635 case PERF_RECORD_ID_INDEX: 1636 return tool->id_index(session, event); 1637 case PERF_RECORD_AUXTRACE_INFO: 1638 return tool->auxtrace_info(session, event); 1639 case PERF_RECORD_AUXTRACE: 1640 /* setup for reading amidst mmap */ 1641 lseek(fd, file_offset + event->header.size, SEEK_SET); 1642 return tool->auxtrace(session, event); 1643 case PERF_RECORD_AUXTRACE_ERROR: 1644 perf_session__auxtrace_error_inc(session, event); 1645 return tool->auxtrace_error(session, event); 1646 case PERF_RECORD_THREAD_MAP: 1647 return tool->thread_map(session, event); 1648 case PERF_RECORD_CPU_MAP: 1649 return tool->cpu_map(session, event); 1650 case PERF_RECORD_STAT_CONFIG: 1651 return tool->stat_config(session, event); 1652 case PERF_RECORD_STAT: 1653 return tool->stat(session, event); 1654 case PERF_RECORD_STAT_ROUND: 1655 return tool->stat_round(session, event); 1656 case PERF_RECORD_TIME_CONV: 1657 session->time_conv = event->time_conv; 1658 return tool->time_conv(session, event); 1659 case PERF_RECORD_HEADER_FEATURE: 1660 return tool->feature(session, event); 1661 case PERF_RECORD_COMPRESSED: 1662 err = tool->compressed(session, event, file_offset); 1663 if (err) 1664 dump_event(session->evlist, event, file_offset, &sample); 1665 return err; 1666 default: 1667 return -EINVAL; 1668 } 1669 } 1670 1671 int perf_session__deliver_synth_event(struct perf_session *session, 1672 union perf_event *event, 1673 struct perf_sample *sample) 1674 { 1675 struct evlist *evlist = session->evlist; 1676 struct perf_tool *tool = session->tool; 1677 1678 events_stats__inc(&evlist->stats, event->header.type); 1679 1680 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1681 return perf_session__process_user_event(session, event, 0); 1682 1683 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0); 1684 } 1685 1686 static void event_swap(union perf_event *event, bool sample_id_all) 1687 { 1688 perf_event__swap_op swap; 1689 1690 swap = perf_event__swap_ops[event->header.type]; 1691 if (swap) 1692 swap(event, sample_id_all); 1693 } 1694 1695 int perf_session__peek_event(struct perf_session *session, off_t file_offset, 1696 void *buf, size_t buf_sz, 1697 union perf_event **event_ptr, 1698 struct perf_sample *sample) 1699 { 1700 union perf_event *event; 1701 size_t hdr_sz, rest; 1702 int fd; 1703 1704 if (session->one_mmap && !session->header.needs_swap) { 1705 event = file_offset - session->one_mmap_offset + 1706 session->one_mmap_addr; 1707 goto out_parse_sample; 1708 } 1709 1710 if (perf_data__is_pipe(session->data)) 1711 return -1; 1712 1713 fd = perf_data__fd(session->data); 1714 hdr_sz = sizeof(struct perf_event_header); 1715 1716 if (buf_sz < hdr_sz) 1717 return -1; 1718 1719 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 || 1720 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz) 1721 return -1; 1722 1723 event = (union perf_event *)buf; 1724 1725 if (session->header.needs_swap) 1726 perf_event_header__bswap(&event->header); 1727 1728 if (event->header.size < hdr_sz || event->header.size > buf_sz) 1729 return -1; 1730 1731 buf += hdr_sz; 1732 rest = event->header.size - hdr_sz; 1733 1734 if (readn(fd, buf, rest) != (ssize_t)rest) 1735 return -1; 1736 1737 if (session->header.needs_swap) 1738 event_swap(event, evlist__sample_id_all(session->evlist)); 1739 1740 out_parse_sample: 1741 1742 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START && 1743 evlist__parse_sample(session->evlist, event, sample)) 1744 return -1; 1745 1746 *event_ptr = event; 1747 1748 return 0; 1749 } 1750 1751 int perf_session__peek_events(struct perf_session *session, u64 offset, 1752 u64 size, peek_events_cb_t cb, void *data) 1753 { 1754 u64 max_offset = offset + size; 1755 char buf[PERF_SAMPLE_MAX_SIZE]; 1756 union perf_event *event; 1757 int err; 1758 1759 do { 1760 err = perf_session__peek_event(session, offset, buf, 1761 PERF_SAMPLE_MAX_SIZE, &event, 1762 NULL); 1763 if (err) 1764 return err; 1765 1766 err = cb(session, event, offset, data); 1767 if (err) 1768 return err; 1769 1770 offset += event->header.size; 1771 if (event->header.type == PERF_RECORD_AUXTRACE) 1772 offset += event->auxtrace.size; 1773 1774 } while (offset < max_offset); 1775 1776 return err; 1777 } 1778 1779 static s64 perf_session__process_event(struct perf_session *session, 1780 union perf_event *event, u64 file_offset) 1781 { 1782 struct evlist *evlist = session->evlist; 1783 struct perf_tool *tool = session->tool; 1784 int ret; 1785 1786 if (session->header.needs_swap) 1787 event_swap(event, evlist__sample_id_all(evlist)); 1788 1789 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1790 return -EINVAL; 1791 1792 events_stats__inc(&evlist->stats, event->header.type); 1793 1794 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1795 return perf_session__process_user_event(session, event, file_offset); 1796 1797 if (tool->ordered_events) { 1798 u64 timestamp = -1ULL; 1799 1800 ret = evlist__parse_sample_timestamp(evlist, event, ×tamp); 1801 if (ret && ret != -1) 1802 return ret; 1803 1804 ret = perf_session__queue_event(session, event, timestamp, file_offset); 1805 if (ret != -ETIME) 1806 return ret; 1807 } 1808 1809 return perf_session__deliver_event(session, event, tool, file_offset); 1810 } 1811 1812 void perf_event_header__bswap(struct perf_event_header *hdr) 1813 { 1814 hdr->type = bswap_32(hdr->type); 1815 hdr->misc = bswap_16(hdr->misc); 1816 hdr->size = bswap_16(hdr->size); 1817 } 1818 1819 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1820 { 1821 return machine__findnew_thread(&session->machines.host, -1, pid); 1822 } 1823 1824 int perf_session__register_idle_thread(struct perf_session *session) 1825 { 1826 struct thread *thread = machine__idle_thread(&session->machines.host); 1827 1828 /* machine__idle_thread() got the thread, so put it */ 1829 thread__put(thread); 1830 return thread ? 0 : -1; 1831 } 1832 1833 static void 1834 perf_session__warn_order(const struct perf_session *session) 1835 { 1836 const struct ordered_events *oe = &session->ordered_events; 1837 struct evsel *evsel; 1838 bool should_warn = true; 1839 1840 evlist__for_each_entry(session->evlist, evsel) { 1841 if (evsel->core.attr.write_backward) 1842 should_warn = false; 1843 } 1844 1845 if (!should_warn) 1846 return; 1847 if (oe->nr_unordered_events != 0) 1848 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events); 1849 } 1850 1851 static void perf_session__warn_about_errors(const struct perf_session *session) 1852 { 1853 const struct events_stats *stats = &session->evlist->stats; 1854 1855 if (session->tool->lost == perf_event__process_lost && 1856 stats->nr_events[PERF_RECORD_LOST] != 0) { 1857 ui__warning("Processed %d events and lost %d chunks!\n\n" 1858 "Check IO/CPU overload!\n\n", 1859 stats->nr_events[0], 1860 stats->nr_events[PERF_RECORD_LOST]); 1861 } 1862 1863 if (session->tool->lost_samples == perf_event__process_lost_samples) { 1864 double drop_rate; 1865 1866 drop_rate = (double)stats->total_lost_samples / 1867 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples); 1868 if (drop_rate > 0.05) { 1869 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n", 1870 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples, 1871 drop_rate * 100.0); 1872 } 1873 } 1874 1875 if (session->tool->aux == perf_event__process_aux && 1876 stats->total_aux_lost != 0) { 1877 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n", 1878 stats->total_aux_lost, 1879 stats->nr_events[PERF_RECORD_AUX]); 1880 } 1881 1882 if (session->tool->aux == perf_event__process_aux && 1883 stats->total_aux_partial != 0) { 1884 bool vmm_exclusive = false; 1885 1886 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive", 1887 &vmm_exclusive); 1888 1889 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n" 1890 "Are you running a KVM guest in the background?%s\n\n", 1891 stats->total_aux_partial, 1892 stats->nr_events[PERF_RECORD_AUX], 1893 vmm_exclusive ? 1894 "\nReloading kvm_intel module with vmm_exclusive=0\n" 1895 "will reduce the gaps to only guest's timeslices." : 1896 ""); 1897 } 1898 1899 if (stats->nr_unknown_events != 0) { 1900 ui__warning("Found %u unknown events!\n\n" 1901 "Is this an older tool processing a perf.data " 1902 "file generated by a more recent tool?\n\n" 1903 "If that is not the case, consider " 1904 "reporting to linux-kernel@vger.kernel.org.\n\n", 1905 stats->nr_unknown_events); 1906 } 1907 1908 if (stats->nr_unknown_id != 0) { 1909 ui__warning("%u samples with id not present in the header\n", 1910 stats->nr_unknown_id); 1911 } 1912 1913 if (stats->nr_invalid_chains != 0) { 1914 ui__warning("Found invalid callchains!\n\n" 1915 "%u out of %u events were discarded for this reason.\n\n" 1916 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1917 stats->nr_invalid_chains, 1918 stats->nr_events[PERF_RECORD_SAMPLE]); 1919 } 1920 1921 if (stats->nr_unprocessable_samples != 0) { 1922 ui__warning("%u unprocessable samples recorded.\n" 1923 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1924 stats->nr_unprocessable_samples); 1925 } 1926 1927 perf_session__warn_order(session); 1928 1929 events_stats__auxtrace_error_warn(stats); 1930 1931 if (stats->nr_proc_map_timeout != 0) { 1932 ui__warning("%d map information files for pre-existing threads were\n" 1933 "not processed, if there are samples for addresses they\n" 1934 "will not be resolved, you may find out which are these\n" 1935 "threads by running with -v and redirecting the output\n" 1936 "to a file.\n" 1937 "The time limit to process proc map is too short?\n" 1938 "Increase it by --proc-map-timeout\n", 1939 stats->nr_proc_map_timeout); 1940 } 1941 } 1942 1943 static int perf_session__flush_thread_stack(struct thread *thread, 1944 void *p __maybe_unused) 1945 { 1946 return thread_stack__flush(thread); 1947 } 1948 1949 static int perf_session__flush_thread_stacks(struct perf_session *session) 1950 { 1951 return machines__for_each_thread(&session->machines, 1952 perf_session__flush_thread_stack, 1953 NULL); 1954 } 1955 1956 volatile int session_done; 1957 1958 static int __perf_session__process_decomp_events(struct perf_session *session); 1959 1960 static int __perf_session__process_pipe_events(struct perf_session *session) 1961 { 1962 struct ordered_events *oe = &session->ordered_events; 1963 struct perf_tool *tool = session->tool; 1964 union perf_event *event; 1965 uint32_t size, cur_size = 0; 1966 void *buf = NULL; 1967 s64 skip = 0; 1968 u64 head; 1969 ssize_t err; 1970 void *p; 1971 1972 perf_tool__fill_defaults(tool); 1973 1974 head = 0; 1975 cur_size = sizeof(union perf_event); 1976 1977 buf = malloc(cur_size); 1978 if (!buf) 1979 return -errno; 1980 ordered_events__set_copy_on_queue(oe, true); 1981 more: 1982 event = buf; 1983 err = perf_data__read(session->data, event, 1984 sizeof(struct perf_event_header)); 1985 if (err <= 0) { 1986 if (err == 0) 1987 goto done; 1988 1989 pr_err("failed to read event header\n"); 1990 goto out_err; 1991 } 1992 1993 if (session->header.needs_swap) 1994 perf_event_header__bswap(&event->header); 1995 1996 size = event->header.size; 1997 if (size < sizeof(struct perf_event_header)) { 1998 pr_err("bad event header size\n"); 1999 goto out_err; 2000 } 2001 2002 if (size > cur_size) { 2003 void *new = realloc(buf, size); 2004 if (!new) { 2005 pr_err("failed to allocate memory to read event\n"); 2006 goto out_err; 2007 } 2008 buf = new; 2009 cur_size = size; 2010 event = buf; 2011 } 2012 p = event; 2013 p += sizeof(struct perf_event_header); 2014 2015 if (size - sizeof(struct perf_event_header)) { 2016 err = perf_data__read(session->data, p, 2017 size - sizeof(struct perf_event_header)); 2018 if (err <= 0) { 2019 if (err == 0) { 2020 pr_err("unexpected end of event stream\n"); 2021 goto done; 2022 } 2023 2024 pr_err("failed to read event data\n"); 2025 goto out_err; 2026 } 2027 } 2028 2029 if ((skip = perf_session__process_event(session, event, head)) < 0) { 2030 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 2031 head, event->header.size, event->header.type); 2032 err = -EINVAL; 2033 goto out_err; 2034 } 2035 2036 head += size; 2037 2038 if (skip > 0) 2039 head += skip; 2040 2041 err = __perf_session__process_decomp_events(session); 2042 if (err) 2043 goto out_err; 2044 2045 if (!session_done()) 2046 goto more; 2047 done: 2048 /* do the final flush for ordered samples */ 2049 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 2050 if (err) 2051 goto out_err; 2052 err = auxtrace__flush_events(session, tool); 2053 if (err) 2054 goto out_err; 2055 err = perf_session__flush_thread_stacks(session); 2056 out_err: 2057 free(buf); 2058 if (!tool->no_warn) 2059 perf_session__warn_about_errors(session); 2060 ordered_events__free(&session->ordered_events); 2061 auxtrace__free_events(session); 2062 return err; 2063 } 2064 2065 static union perf_event * 2066 prefetch_event(char *buf, u64 head, size_t mmap_size, 2067 bool needs_swap, union perf_event *error) 2068 { 2069 union perf_event *event; 2070 2071 /* 2072 * Ensure we have enough space remaining to read 2073 * the size of the event in the headers. 2074 */ 2075 if (head + sizeof(event->header) > mmap_size) 2076 return NULL; 2077 2078 event = (union perf_event *)(buf + head); 2079 if (needs_swap) 2080 perf_event_header__bswap(&event->header); 2081 2082 if (head + event->header.size <= mmap_size) 2083 return event; 2084 2085 /* We're not fetching the event so swap back again */ 2086 if (needs_swap) 2087 perf_event_header__bswap(&event->header); 2088 2089 pr_debug("%s: head=%#" PRIx64 " event->header_size=%#x, mmap_size=%#zx:" 2090 " fuzzed or compressed perf.data?\n",__func__, head, event->header.size, mmap_size); 2091 2092 return error; 2093 } 2094 2095 static union perf_event * 2096 fetch_mmaped_event(u64 head, size_t mmap_size, char *buf, bool needs_swap) 2097 { 2098 return prefetch_event(buf, head, mmap_size, needs_swap, ERR_PTR(-EINVAL)); 2099 } 2100 2101 static union perf_event * 2102 fetch_decomp_event(u64 head, size_t mmap_size, char *buf, bool needs_swap) 2103 { 2104 return prefetch_event(buf, head, mmap_size, needs_swap, NULL); 2105 } 2106 2107 static int __perf_session__process_decomp_events(struct perf_session *session) 2108 { 2109 s64 skip; 2110 u64 size, file_pos = 0; 2111 struct decomp *decomp = session->decomp_last; 2112 2113 if (!decomp) 2114 return 0; 2115 2116 while (decomp->head < decomp->size && !session_done()) { 2117 union perf_event *event = fetch_decomp_event(decomp->head, decomp->size, decomp->data, 2118 session->header.needs_swap); 2119 2120 if (!event) 2121 break; 2122 2123 size = event->header.size; 2124 2125 if (size < sizeof(struct perf_event_header) || 2126 (skip = perf_session__process_event(session, event, file_pos)) < 0) { 2127 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 2128 decomp->file_pos + decomp->head, event->header.size, event->header.type); 2129 return -EINVAL; 2130 } 2131 2132 if (skip) 2133 size += skip; 2134 2135 decomp->head += size; 2136 } 2137 2138 return 0; 2139 } 2140 2141 /* 2142 * On 64bit we can mmap the data file in one go. No need for tiny mmap 2143 * slices. On 32bit we use 32MB. 2144 */ 2145 #if BITS_PER_LONG == 64 2146 #define MMAP_SIZE ULLONG_MAX 2147 #define NUM_MMAPS 1 2148 #else 2149 #define MMAP_SIZE (32 * 1024 * 1024ULL) 2150 #define NUM_MMAPS 128 2151 #endif 2152 2153 struct reader; 2154 2155 typedef s64 (*reader_cb_t)(struct perf_session *session, 2156 union perf_event *event, 2157 u64 file_offset); 2158 2159 struct reader { 2160 int fd; 2161 u64 data_size; 2162 u64 data_offset; 2163 reader_cb_t process; 2164 bool in_place_update; 2165 }; 2166 2167 static int 2168 reader__process_events(struct reader *rd, struct perf_session *session, 2169 struct ui_progress *prog) 2170 { 2171 u64 data_size = rd->data_size; 2172 u64 head, page_offset, file_offset, file_pos, size; 2173 int err = 0, mmap_prot, mmap_flags, map_idx = 0; 2174 size_t mmap_size; 2175 char *buf, *mmaps[NUM_MMAPS]; 2176 union perf_event *event; 2177 s64 skip; 2178 2179 page_offset = page_size * (rd->data_offset / page_size); 2180 file_offset = page_offset; 2181 head = rd->data_offset - page_offset; 2182 2183 ui_progress__init_size(prog, data_size, "Processing events..."); 2184 2185 data_size += rd->data_offset; 2186 2187 mmap_size = MMAP_SIZE; 2188 if (mmap_size > data_size) { 2189 mmap_size = data_size; 2190 session->one_mmap = true; 2191 } 2192 2193 memset(mmaps, 0, sizeof(mmaps)); 2194 2195 mmap_prot = PROT_READ; 2196 mmap_flags = MAP_SHARED; 2197 2198 if (rd->in_place_update) { 2199 mmap_prot |= PROT_WRITE; 2200 } else if (session->header.needs_swap) { 2201 mmap_prot |= PROT_WRITE; 2202 mmap_flags = MAP_PRIVATE; 2203 } 2204 remap: 2205 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, rd->fd, 2206 file_offset); 2207 if (buf == MAP_FAILED) { 2208 pr_err("failed to mmap file\n"); 2209 err = -errno; 2210 goto out; 2211 } 2212 mmaps[map_idx] = buf; 2213 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 2214 file_pos = file_offset + head; 2215 if (session->one_mmap) { 2216 session->one_mmap_addr = buf; 2217 session->one_mmap_offset = file_offset; 2218 } 2219 2220 more: 2221 event = fetch_mmaped_event(head, mmap_size, buf, session->header.needs_swap); 2222 if (IS_ERR(event)) 2223 return PTR_ERR(event); 2224 2225 if (!event) { 2226 if (mmaps[map_idx]) { 2227 munmap(mmaps[map_idx], mmap_size); 2228 mmaps[map_idx] = NULL; 2229 } 2230 2231 page_offset = page_size * (head / page_size); 2232 file_offset += page_offset; 2233 head -= page_offset; 2234 goto remap; 2235 } 2236 2237 size = event->header.size; 2238 2239 skip = -EINVAL; 2240 2241 if (size < sizeof(struct perf_event_header) || 2242 (skip = rd->process(session, event, file_pos)) < 0) { 2243 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n", 2244 file_offset + head, event->header.size, 2245 event->header.type, strerror(-skip)); 2246 err = skip; 2247 goto out; 2248 } 2249 2250 if (skip) 2251 size += skip; 2252 2253 head += size; 2254 file_pos += size; 2255 2256 err = __perf_session__process_decomp_events(session); 2257 if (err) 2258 goto out; 2259 2260 ui_progress__update(prog, size); 2261 2262 if (session_done()) 2263 goto out; 2264 2265 if (file_pos < data_size) 2266 goto more; 2267 2268 out: 2269 return err; 2270 } 2271 2272 static s64 process_simple(struct perf_session *session, 2273 union perf_event *event, 2274 u64 file_offset) 2275 { 2276 return perf_session__process_event(session, event, file_offset); 2277 } 2278 2279 static int __perf_session__process_events(struct perf_session *session) 2280 { 2281 struct reader rd = { 2282 .fd = perf_data__fd(session->data), 2283 .data_size = session->header.data_size, 2284 .data_offset = session->header.data_offset, 2285 .process = process_simple, 2286 .in_place_update = session->data->in_place_update, 2287 }; 2288 struct ordered_events *oe = &session->ordered_events; 2289 struct perf_tool *tool = session->tool; 2290 struct ui_progress prog; 2291 int err; 2292 2293 perf_tool__fill_defaults(tool); 2294 2295 if (rd.data_size == 0) 2296 return -1; 2297 2298 ui_progress__init_size(&prog, rd.data_size, "Processing events..."); 2299 2300 err = reader__process_events(&rd, session, &prog); 2301 if (err) 2302 goto out_err; 2303 /* do the final flush for ordered samples */ 2304 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 2305 if (err) 2306 goto out_err; 2307 err = auxtrace__flush_events(session, tool); 2308 if (err) 2309 goto out_err; 2310 err = perf_session__flush_thread_stacks(session); 2311 out_err: 2312 ui_progress__finish(); 2313 if (!tool->no_warn) 2314 perf_session__warn_about_errors(session); 2315 /* 2316 * We may switching perf.data output, make ordered_events 2317 * reusable. 2318 */ 2319 ordered_events__reinit(&session->ordered_events); 2320 auxtrace__free_events(session); 2321 session->one_mmap = false; 2322 return err; 2323 } 2324 2325 int perf_session__process_events(struct perf_session *session) 2326 { 2327 if (perf_session__register_idle_thread(session) < 0) 2328 return -ENOMEM; 2329 2330 if (perf_data__is_pipe(session->data)) 2331 return __perf_session__process_pipe_events(session); 2332 2333 return __perf_session__process_events(session); 2334 } 2335 2336 bool perf_session__has_traces(struct perf_session *session, const char *msg) 2337 { 2338 struct evsel *evsel; 2339 2340 evlist__for_each_entry(session->evlist, evsel) { 2341 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) 2342 return true; 2343 } 2344 2345 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 2346 return false; 2347 } 2348 2349 int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr) 2350 { 2351 char *bracket; 2352 struct ref_reloc_sym *ref; 2353 struct kmap *kmap; 2354 2355 ref = zalloc(sizeof(struct ref_reloc_sym)); 2356 if (ref == NULL) 2357 return -ENOMEM; 2358 2359 ref->name = strdup(symbol_name); 2360 if (ref->name == NULL) { 2361 free(ref); 2362 return -ENOMEM; 2363 } 2364 2365 bracket = strchr(ref->name, ']'); 2366 if (bracket) 2367 *bracket = '\0'; 2368 2369 ref->addr = addr; 2370 2371 kmap = map__kmap(map); 2372 if (kmap) 2373 kmap->ref_reloc_sym = ref; 2374 2375 return 0; 2376 } 2377 2378 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp) 2379 { 2380 return machines__fprintf_dsos(&session->machines, fp); 2381 } 2382 2383 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp, 2384 bool (skip)(struct dso *dso, int parm), int parm) 2385 { 2386 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm); 2387 } 2388 2389 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp, 2390 bool skip_empty) 2391 { 2392 size_t ret; 2393 const char *msg = ""; 2394 2395 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE)) 2396 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)"; 2397 2398 ret = fprintf(fp, "\nAggregated stats:%s\n", msg); 2399 2400 ret += events_stats__fprintf(&session->evlist->stats, fp, skip_empty); 2401 return ret; 2402 } 2403 2404 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 2405 { 2406 /* 2407 * FIXME: Here we have to actually print all the machines in this 2408 * session, not just the host... 2409 */ 2410 return machine__fprintf(&session->machines.host, fp); 2411 } 2412 2413 struct evsel *perf_session__find_first_evtype(struct perf_session *session, 2414 unsigned int type) 2415 { 2416 struct evsel *pos; 2417 2418 evlist__for_each_entry(session->evlist, pos) { 2419 if (pos->core.attr.type == type) 2420 return pos; 2421 } 2422 return NULL; 2423 } 2424 2425 int perf_session__cpu_bitmap(struct perf_session *session, 2426 const char *cpu_list, unsigned long *cpu_bitmap) 2427 { 2428 int i, err = -1; 2429 struct perf_cpu_map *map; 2430 int nr_cpus = min(session->header.env.nr_cpus_avail, MAX_NR_CPUS); 2431 2432 for (i = 0; i < PERF_TYPE_MAX; ++i) { 2433 struct evsel *evsel; 2434 2435 evsel = perf_session__find_first_evtype(session, i); 2436 if (!evsel) 2437 continue; 2438 2439 if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CPU)) { 2440 pr_err("File does not contain CPU events. " 2441 "Remove -C option to proceed.\n"); 2442 return -1; 2443 } 2444 } 2445 2446 map = perf_cpu_map__new(cpu_list); 2447 if (map == NULL) { 2448 pr_err("Invalid cpu_list\n"); 2449 return -1; 2450 } 2451 2452 for (i = 0; i < map->nr; i++) { 2453 int cpu = map->map[i]; 2454 2455 if (cpu >= nr_cpus) { 2456 pr_err("Requested CPU %d too large. " 2457 "Consider raising MAX_NR_CPUS\n", cpu); 2458 goto out_delete_map; 2459 } 2460 2461 set_bit(cpu, cpu_bitmap); 2462 } 2463 2464 err = 0; 2465 2466 out_delete_map: 2467 perf_cpu_map__put(map); 2468 return err; 2469 } 2470 2471 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 2472 bool full) 2473 { 2474 if (session == NULL || fp == NULL) 2475 return; 2476 2477 fprintf(fp, "# ========\n"); 2478 perf_header__fprintf_info(session, fp, full); 2479 fprintf(fp, "# ========\n#\n"); 2480 } 2481 2482 int perf_event__process_id_index(struct perf_session *session, 2483 union perf_event *event) 2484 { 2485 struct evlist *evlist = session->evlist; 2486 struct perf_record_id_index *ie = &event->id_index; 2487 size_t i, nr, max_nr; 2488 2489 max_nr = (ie->header.size - sizeof(struct perf_record_id_index)) / 2490 sizeof(struct id_index_entry); 2491 nr = ie->nr; 2492 if (nr > max_nr) 2493 return -EINVAL; 2494 2495 if (dump_trace) 2496 fprintf(stdout, " nr: %zu\n", nr); 2497 2498 for (i = 0; i < nr; i++) { 2499 struct id_index_entry *e = &ie->entries[i]; 2500 struct perf_sample_id *sid; 2501 2502 if (dump_trace) { 2503 fprintf(stdout, " ... id: %"PRI_lu64, e->id); 2504 fprintf(stdout, " idx: %"PRI_lu64, e->idx); 2505 fprintf(stdout, " cpu: %"PRI_ld64, e->cpu); 2506 fprintf(stdout, " tid: %"PRI_ld64"\n", e->tid); 2507 } 2508 2509 sid = evlist__id2sid(evlist, e->id); 2510 if (!sid) 2511 return -ENOENT; 2512 sid->idx = e->idx; 2513 sid->cpu = e->cpu; 2514 sid->tid = e->tid; 2515 } 2516 return 0; 2517 } 2518