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