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->aux_output_hw_id == NULL) 513 tool->aux_output_hw_id = perf_event__process_aux_output_hw_id; 514 if (tool->read == NULL) 515 tool->read = process_event_sample_stub; 516 if (tool->throttle == NULL) 517 tool->throttle = process_event_stub; 518 if (tool->unthrottle == NULL) 519 tool->unthrottle = process_event_stub; 520 if (tool->attr == NULL) 521 tool->attr = process_event_synth_attr_stub; 522 if (tool->event_update == NULL) 523 tool->event_update = process_event_synth_event_update_stub; 524 if (tool->tracing_data == NULL) 525 tool->tracing_data = process_event_synth_tracing_data_stub; 526 if (tool->build_id == NULL) 527 tool->build_id = process_event_op2_stub; 528 if (tool->finished_round == NULL) { 529 if (tool->ordered_events) 530 tool->finished_round = process_finished_round; 531 else 532 tool->finished_round = process_finished_round_stub; 533 } 534 if (tool->id_index == NULL) 535 tool->id_index = process_event_op2_stub; 536 if (tool->auxtrace_info == NULL) 537 tool->auxtrace_info = process_event_op2_stub; 538 if (tool->auxtrace == NULL) 539 tool->auxtrace = process_event_auxtrace_stub; 540 if (tool->auxtrace_error == NULL) 541 tool->auxtrace_error = process_event_op2_stub; 542 if (tool->thread_map == NULL) 543 tool->thread_map = process_event_thread_map_stub; 544 if (tool->cpu_map == NULL) 545 tool->cpu_map = process_event_cpu_map_stub; 546 if (tool->stat_config == NULL) 547 tool->stat_config = process_event_stat_config_stub; 548 if (tool->stat == NULL) 549 tool->stat = process_stat_stub; 550 if (tool->stat_round == NULL) 551 tool->stat_round = process_stat_round_stub; 552 if (tool->time_conv == NULL) 553 tool->time_conv = process_event_time_conv_stub; 554 if (tool->feature == NULL) 555 tool->feature = process_event_op2_stub; 556 if (tool->compressed == NULL) 557 tool->compressed = perf_session__process_compressed_event; 558 } 559 560 static void swap_sample_id_all(union perf_event *event, void *data) 561 { 562 void *end = (void *) event + event->header.size; 563 int size = end - data; 564 565 BUG_ON(size % sizeof(u64)); 566 mem_bswap_64(data, size); 567 } 568 569 static void perf_event__all64_swap(union perf_event *event, 570 bool sample_id_all __maybe_unused) 571 { 572 struct perf_event_header *hdr = &event->header; 573 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 574 } 575 576 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 577 { 578 event->comm.pid = bswap_32(event->comm.pid); 579 event->comm.tid = bswap_32(event->comm.tid); 580 581 if (sample_id_all) { 582 void *data = &event->comm.comm; 583 584 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 585 swap_sample_id_all(event, data); 586 } 587 } 588 589 static void perf_event__mmap_swap(union perf_event *event, 590 bool sample_id_all) 591 { 592 event->mmap.pid = bswap_32(event->mmap.pid); 593 event->mmap.tid = bswap_32(event->mmap.tid); 594 event->mmap.start = bswap_64(event->mmap.start); 595 event->mmap.len = bswap_64(event->mmap.len); 596 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 597 598 if (sample_id_all) { 599 void *data = &event->mmap.filename; 600 601 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 602 swap_sample_id_all(event, data); 603 } 604 } 605 606 static void perf_event__mmap2_swap(union perf_event *event, 607 bool sample_id_all) 608 { 609 event->mmap2.pid = bswap_32(event->mmap2.pid); 610 event->mmap2.tid = bswap_32(event->mmap2.tid); 611 event->mmap2.start = bswap_64(event->mmap2.start); 612 event->mmap2.len = bswap_64(event->mmap2.len); 613 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); 614 615 if (!(event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID)) { 616 event->mmap2.maj = bswap_32(event->mmap2.maj); 617 event->mmap2.min = bswap_32(event->mmap2.min); 618 event->mmap2.ino = bswap_64(event->mmap2.ino); 619 event->mmap2.ino_generation = bswap_64(event->mmap2.ino_generation); 620 } 621 622 if (sample_id_all) { 623 void *data = &event->mmap2.filename; 624 625 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 626 swap_sample_id_all(event, data); 627 } 628 } 629 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 630 { 631 event->fork.pid = bswap_32(event->fork.pid); 632 event->fork.tid = bswap_32(event->fork.tid); 633 event->fork.ppid = bswap_32(event->fork.ppid); 634 event->fork.ptid = bswap_32(event->fork.ptid); 635 event->fork.time = bswap_64(event->fork.time); 636 637 if (sample_id_all) 638 swap_sample_id_all(event, &event->fork + 1); 639 } 640 641 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 642 { 643 event->read.pid = bswap_32(event->read.pid); 644 event->read.tid = bswap_32(event->read.tid); 645 event->read.value = bswap_64(event->read.value); 646 event->read.time_enabled = bswap_64(event->read.time_enabled); 647 event->read.time_running = bswap_64(event->read.time_running); 648 event->read.id = bswap_64(event->read.id); 649 650 if (sample_id_all) 651 swap_sample_id_all(event, &event->read + 1); 652 } 653 654 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all) 655 { 656 event->aux.aux_offset = bswap_64(event->aux.aux_offset); 657 event->aux.aux_size = bswap_64(event->aux.aux_size); 658 event->aux.flags = bswap_64(event->aux.flags); 659 660 if (sample_id_all) 661 swap_sample_id_all(event, &event->aux + 1); 662 } 663 664 static void perf_event__itrace_start_swap(union perf_event *event, 665 bool sample_id_all) 666 { 667 event->itrace_start.pid = bswap_32(event->itrace_start.pid); 668 event->itrace_start.tid = bswap_32(event->itrace_start.tid); 669 670 if (sample_id_all) 671 swap_sample_id_all(event, &event->itrace_start + 1); 672 } 673 674 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all) 675 { 676 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) { 677 event->context_switch.next_prev_pid = 678 bswap_32(event->context_switch.next_prev_pid); 679 event->context_switch.next_prev_tid = 680 bswap_32(event->context_switch.next_prev_tid); 681 } 682 683 if (sample_id_all) 684 swap_sample_id_all(event, &event->context_switch + 1); 685 } 686 687 static void perf_event__text_poke_swap(union perf_event *event, bool sample_id_all) 688 { 689 event->text_poke.addr = bswap_64(event->text_poke.addr); 690 event->text_poke.old_len = bswap_16(event->text_poke.old_len); 691 event->text_poke.new_len = bswap_16(event->text_poke.new_len); 692 693 if (sample_id_all) { 694 size_t len = sizeof(event->text_poke.old_len) + 695 sizeof(event->text_poke.new_len) + 696 event->text_poke.old_len + 697 event->text_poke.new_len; 698 void *data = &event->text_poke.old_len; 699 700 data += PERF_ALIGN(len, sizeof(u64)); 701 swap_sample_id_all(event, data); 702 } 703 } 704 705 static void perf_event__throttle_swap(union perf_event *event, 706 bool sample_id_all) 707 { 708 event->throttle.time = bswap_64(event->throttle.time); 709 event->throttle.id = bswap_64(event->throttle.id); 710 event->throttle.stream_id = bswap_64(event->throttle.stream_id); 711 712 if (sample_id_all) 713 swap_sample_id_all(event, &event->throttle + 1); 714 } 715 716 static void perf_event__namespaces_swap(union perf_event *event, 717 bool sample_id_all) 718 { 719 u64 i; 720 721 event->namespaces.pid = bswap_32(event->namespaces.pid); 722 event->namespaces.tid = bswap_32(event->namespaces.tid); 723 event->namespaces.nr_namespaces = bswap_64(event->namespaces.nr_namespaces); 724 725 for (i = 0; i < event->namespaces.nr_namespaces; i++) { 726 struct perf_ns_link_info *ns = &event->namespaces.link_info[i]; 727 728 ns->dev = bswap_64(ns->dev); 729 ns->ino = bswap_64(ns->ino); 730 } 731 732 if (sample_id_all) 733 swap_sample_id_all(event, &event->namespaces.link_info[i]); 734 } 735 736 static void perf_event__cgroup_swap(union perf_event *event, bool sample_id_all) 737 { 738 event->cgroup.id = bswap_64(event->cgroup.id); 739 740 if (sample_id_all) { 741 void *data = &event->cgroup.path; 742 743 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 744 swap_sample_id_all(event, data); 745 } 746 } 747 748 static u8 revbyte(u8 b) 749 { 750 int rev = (b >> 4) | ((b & 0xf) << 4); 751 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 752 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 753 return (u8) rev; 754 } 755 756 /* 757 * XXX this is hack in attempt to carry flags bitfield 758 * through endian village. ABI says: 759 * 760 * Bit-fields are allocated from right to left (least to most significant) 761 * on little-endian implementations and from left to right (most to least 762 * significant) on big-endian implementations. 763 * 764 * The above seems to be byte specific, so we need to reverse each 765 * byte of the bitfield. 'Internet' also says this might be implementation 766 * specific and we probably need proper fix and carry perf_event_attr 767 * bitfield flags in separate data file FEAT_ section. Thought this seems 768 * to work for now. 769 */ 770 static void swap_bitfield(u8 *p, unsigned len) 771 { 772 unsigned i; 773 774 for (i = 0; i < len; i++) { 775 *p = revbyte(*p); 776 p++; 777 } 778 } 779 780 /* exported for swapping attributes in file header */ 781 void perf_event__attr_swap(struct perf_event_attr *attr) 782 { 783 attr->type = bswap_32(attr->type); 784 attr->size = bswap_32(attr->size); 785 786 #define bswap_safe(f, n) \ 787 (attr->size > (offsetof(struct perf_event_attr, f) + \ 788 sizeof(attr->f) * (n))) 789 #define bswap_field(f, sz) \ 790 do { \ 791 if (bswap_safe(f, 0)) \ 792 attr->f = bswap_##sz(attr->f); \ 793 } while(0) 794 #define bswap_field_16(f) bswap_field(f, 16) 795 #define bswap_field_32(f) bswap_field(f, 32) 796 #define bswap_field_64(f) bswap_field(f, 64) 797 798 bswap_field_64(config); 799 bswap_field_64(sample_period); 800 bswap_field_64(sample_type); 801 bswap_field_64(read_format); 802 bswap_field_32(wakeup_events); 803 bswap_field_32(bp_type); 804 bswap_field_64(bp_addr); 805 bswap_field_64(bp_len); 806 bswap_field_64(branch_sample_type); 807 bswap_field_64(sample_regs_user); 808 bswap_field_32(sample_stack_user); 809 bswap_field_32(aux_watermark); 810 bswap_field_16(sample_max_stack); 811 bswap_field_32(aux_sample_size); 812 813 /* 814 * After read_format are bitfields. Check read_format because 815 * we are unable to use offsetof on bitfield. 816 */ 817 if (bswap_safe(read_format, 1)) 818 swap_bitfield((u8 *) (&attr->read_format + 1), 819 sizeof(u64)); 820 #undef bswap_field_64 821 #undef bswap_field_32 822 #undef bswap_field 823 #undef bswap_safe 824 } 825 826 static void perf_event__hdr_attr_swap(union perf_event *event, 827 bool sample_id_all __maybe_unused) 828 { 829 size_t size; 830 831 perf_event__attr_swap(&event->attr.attr); 832 833 size = event->header.size; 834 size -= (void *)&event->attr.id - (void *)event; 835 mem_bswap_64(event->attr.id, size); 836 } 837 838 static void perf_event__event_update_swap(union perf_event *event, 839 bool sample_id_all __maybe_unused) 840 { 841 event->event_update.type = bswap_64(event->event_update.type); 842 event->event_update.id = bswap_64(event->event_update.id); 843 } 844 845 static void perf_event__event_type_swap(union perf_event *event, 846 bool sample_id_all __maybe_unused) 847 { 848 event->event_type.event_type.event_id = 849 bswap_64(event->event_type.event_type.event_id); 850 } 851 852 static void perf_event__tracing_data_swap(union perf_event *event, 853 bool sample_id_all __maybe_unused) 854 { 855 event->tracing_data.size = bswap_32(event->tracing_data.size); 856 } 857 858 static void perf_event__auxtrace_info_swap(union perf_event *event, 859 bool sample_id_all __maybe_unused) 860 { 861 size_t size; 862 863 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type); 864 865 size = event->header.size; 866 size -= (void *)&event->auxtrace_info.priv - (void *)event; 867 mem_bswap_64(event->auxtrace_info.priv, size); 868 } 869 870 static void perf_event__auxtrace_swap(union perf_event *event, 871 bool sample_id_all __maybe_unused) 872 { 873 event->auxtrace.size = bswap_64(event->auxtrace.size); 874 event->auxtrace.offset = bswap_64(event->auxtrace.offset); 875 event->auxtrace.reference = bswap_64(event->auxtrace.reference); 876 event->auxtrace.idx = bswap_32(event->auxtrace.idx); 877 event->auxtrace.tid = bswap_32(event->auxtrace.tid); 878 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu); 879 } 880 881 static void perf_event__auxtrace_error_swap(union perf_event *event, 882 bool sample_id_all __maybe_unused) 883 { 884 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type); 885 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code); 886 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu); 887 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid); 888 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid); 889 event->auxtrace_error.fmt = bswap_32(event->auxtrace_error.fmt); 890 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip); 891 if (event->auxtrace_error.fmt) 892 event->auxtrace_error.time = bswap_64(event->auxtrace_error.time); 893 } 894 895 static void perf_event__thread_map_swap(union perf_event *event, 896 bool sample_id_all __maybe_unused) 897 { 898 unsigned i; 899 900 event->thread_map.nr = bswap_64(event->thread_map.nr); 901 902 for (i = 0; i < event->thread_map.nr; i++) 903 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid); 904 } 905 906 static void perf_event__cpu_map_swap(union perf_event *event, 907 bool sample_id_all __maybe_unused) 908 { 909 struct perf_record_cpu_map_data *data = &event->cpu_map.data; 910 struct cpu_map_entries *cpus; 911 struct perf_record_record_cpu_map *mask; 912 unsigned i; 913 914 data->type = bswap_16(data->type); 915 916 switch (data->type) { 917 case PERF_CPU_MAP__CPUS: 918 cpus = (struct cpu_map_entries *)data->data; 919 920 cpus->nr = bswap_16(cpus->nr); 921 922 for (i = 0; i < cpus->nr; i++) 923 cpus->cpu[i] = bswap_16(cpus->cpu[i]); 924 break; 925 case PERF_CPU_MAP__MASK: 926 mask = (struct perf_record_record_cpu_map *)data->data; 927 928 mask->nr = bswap_16(mask->nr); 929 mask->long_size = bswap_16(mask->long_size); 930 931 switch (mask->long_size) { 932 case 4: mem_bswap_32(&mask->mask, mask->nr); break; 933 case 8: mem_bswap_64(&mask->mask, mask->nr); break; 934 default: 935 pr_err("cpu_map swap: unsupported long size\n"); 936 } 937 default: 938 break; 939 } 940 } 941 942 static void perf_event__stat_config_swap(union perf_event *event, 943 bool sample_id_all __maybe_unused) 944 { 945 u64 size; 946 947 size = bswap_64(event->stat_config.nr) * sizeof(event->stat_config.data[0]); 948 size += 1; /* nr item itself */ 949 mem_bswap_64(&event->stat_config.nr, size); 950 } 951 952 static void perf_event__stat_swap(union perf_event *event, 953 bool sample_id_all __maybe_unused) 954 { 955 event->stat.id = bswap_64(event->stat.id); 956 event->stat.thread = bswap_32(event->stat.thread); 957 event->stat.cpu = bswap_32(event->stat.cpu); 958 event->stat.val = bswap_64(event->stat.val); 959 event->stat.ena = bswap_64(event->stat.ena); 960 event->stat.run = bswap_64(event->stat.run); 961 } 962 963 static void perf_event__stat_round_swap(union perf_event *event, 964 bool sample_id_all __maybe_unused) 965 { 966 event->stat_round.type = bswap_64(event->stat_round.type); 967 event->stat_round.time = bswap_64(event->stat_round.time); 968 } 969 970 static void perf_event__time_conv_swap(union perf_event *event, 971 bool sample_id_all __maybe_unused) 972 { 973 event->time_conv.time_shift = bswap_64(event->time_conv.time_shift); 974 event->time_conv.time_mult = bswap_64(event->time_conv.time_mult); 975 event->time_conv.time_zero = bswap_64(event->time_conv.time_zero); 976 977 if (event_contains(event->time_conv, time_cycles)) { 978 event->time_conv.time_cycles = bswap_64(event->time_conv.time_cycles); 979 event->time_conv.time_mask = bswap_64(event->time_conv.time_mask); 980 } 981 } 982 983 typedef void (*perf_event__swap_op)(union perf_event *event, 984 bool sample_id_all); 985 986 static perf_event__swap_op perf_event__swap_ops[] = { 987 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 988 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap, 989 [PERF_RECORD_COMM] = perf_event__comm_swap, 990 [PERF_RECORD_FORK] = perf_event__task_swap, 991 [PERF_RECORD_EXIT] = perf_event__task_swap, 992 [PERF_RECORD_LOST] = perf_event__all64_swap, 993 [PERF_RECORD_READ] = perf_event__read_swap, 994 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap, 995 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap, 996 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 997 [PERF_RECORD_AUX] = perf_event__aux_swap, 998 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap, 999 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap, 1000 [PERF_RECORD_SWITCH] = perf_event__switch_swap, 1001 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap, 1002 [PERF_RECORD_NAMESPACES] = perf_event__namespaces_swap, 1003 [PERF_RECORD_CGROUP] = perf_event__cgroup_swap, 1004 [PERF_RECORD_TEXT_POKE] = perf_event__text_poke_swap, 1005 [PERF_RECORD_AUX_OUTPUT_HW_ID] = perf_event__all64_swap, 1006 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 1007 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 1008 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 1009 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 1010 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap, 1011 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap, 1012 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap, 1013 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap, 1014 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap, 1015 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap, 1016 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap, 1017 [PERF_RECORD_STAT] = perf_event__stat_swap, 1018 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap, 1019 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap, 1020 [PERF_RECORD_TIME_CONV] = perf_event__time_conv_swap, 1021 [PERF_RECORD_HEADER_MAX] = NULL, 1022 }; 1023 1024 /* 1025 * When perf record finishes a pass on every buffers, it records this pseudo 1026 * event. 1027 * We record the max timestamp t found in the pass n. 1028 * Assuming these timestamps are monotonic across cpus, we know that if 1029 * a buffer still has events with timestamps below t, they will be all 1030 * available and then read in the pass n + 1. 1031 * Hence when we start to read the pass n + 2, we can safely flush every 1032 * events with timestamps below t. 1033 * 1034 * ============ PASS n ================= 1035 * CPU 0 | CPU 1 1036 * | 1037 * cnt1 timestamps | cnt2 timestamps 1038 * 1 | 2 1039 * 2 | 3 1040 * - | 4 <--- max recorded 1041 * 1042 * ============ PASS n + 1 ============== 1043 * CPU 0 | CPU 1 1044 * | 1045 * cnt1 timestamps | cnt2 timestamps 1046 * 3 | 5 1047 * 4 | 6 1048 * 5 | 7 <---- max recorded 1049 * 1050 * Flush every events below timestamp 4 1051 * 1052 * ============ PASS n + 2 ============== 1053 * CPU 0 | CPU 1 1054 * | 1055 * cnt1 timestamps | cnt2 timestamps 1056 * 6 | 8 1057 * 7 | 9 1058 * - | 10 1059 * 1060 * Flush every events below timestamp 7 1061 * etc... 1062 */ 1063 static int process_finished_round(struct perf_tool *tool __maybe_unused, 1064 union perf_event *event __maybe_unused, 1065 struct ordered_events *oe) 1066 { 1067 if (dump_trace) 1068 fprintf(stdout, "\n"); 1069 return ordered_events__flush(oe, OE_FLUSH__ROUND); 1070 } 1071 1072 int perf_session__queue_event(struct perf_session *s, union perf_event *event, 1073 u64 timestamp, u64 file_offset) 1074 { 1075 return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset); 1076 } 1077 1078 static void callchain__lbr_callstack_printf(struct perf_sample *sample) 1079 { 1080 struct ip_callchain *callchain = sample->callchain; 1081 struct branch_stack *lbr_stack = sample->branch_stack; 1082 struct branch_entry *entries = perf_sample__branch_entries(sample); 1083 u64 kernel_callchain_nr = callchain->nr; 1084 unsigned int i; 1085 1086 for (i = 0; i < kernel_callchain_nr; i++) { 1087 if (callchain->ips[i] == PERF_CONTEXT_USER) 1088 break; 1089 } 1090 1091 if ((i != kernel_callchain_nr) && lbr_stack->nr) { 1092 u64 total_nr; 1093 /* 1094 * LBR callstack can only get user call chain, 1095 * i is kernel call chain number, 1096 * 1 is PERF_CONTEXT_USER. 1097 * 1098 * The user call chain is stored in LBR registers. 1099 * LBR are pair registers. The caller is stored 1100 * in "from" register, while the callee is stored 1101 * in "to" register. 1102 * For example, there is a call stack 1103 * "A"->"B"->"C"->"D". 1104 * The LBR registers will be recorded like 1105 * "C"->"D", "B"->"C", "A"->"B". 1106 * So only the first "to" register and all "from" 1107 * registers are needed to construct the whole stack. 1108 */ 1109 total_nr = i + 1 + lbr_stack->nr + 1; 1110 kernel_callchain_nr = i + 1; 1111 1112 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr); 1113 1114 for (i = 0; i < kernel_callchain_nr; i++) 1115 printf("..... %2d: %016" PRIx64 "\n", 1116 i, callchain->ips[i]); 1117 1118 printf("..... %2d: %016" PRIx64 "\n", 1119 (int)(kernel_callchain_nr), entries[0].to); 1120 for (i = 0; i < lbr_stack->nr; i++) 1121 printf("..... %2d: %016" PRIx64 "\n", 1122 (int)(i + kernel_callchain_nr + 1), entries[i].from); 1123 } 1124 } 1125 1126 static void callchain__printf(struct evsel *evsel, 1127 struct perf_sample *sample) 1128 { 1129 unsigned int i; 1130 struct ip_callchain *callchain = sample->callchain; 1131 1132 if (evsel__has_branch_callstack(evsel)) 1133 callchain__lbr_callstack_printf(sample); 1134 1135 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr); 1136 1137 for (i = 0; i < callchain->nr; i++) 1138 printf("..... %2d: %016" PRIx64 "\n", 1139 i, callchain->ips[i]); 1140 } 1141 1142 static void branch_stack__printf(struct perf_sample *sample, bool callstack) 1143 { 1144 struct branch_entry *entries = perf_sample__branch_entries(sample); 1145 uint64_t i; 1146 1147 printf("%s: nr:%" PRIu64 "\n", 1148 !callstack ? "... branch stack" : "... branch callstack", 1149 sample->branch_stack->nr); 1150 1151 for (i = 0; i < sample->branch_stack->nr; i++) { 1152 struct branch_entry *e = &entries[i]; 1153 1154 if (!callstack) { 1155 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n", 1156 i, e->from, e->to, 1157 (unsigned short)e->flags.cycles, 1158 e->flags.mispred ? "M" : " ", 1159 e->flags.predicted ? "P" : " ", 1160 e->flags.abort ? "A" : " ", 1161 e->flags.in_tx ? "T" : " ", 1162 (unsigned)e->flags.reserved); 1163 } else { 1164 printf("..... %2"PRIu64": %016" PRIx64 "\n", 1165 i, i > 0 ? e->from : e->to); 1166 } 1167 } 1168 } 1169 1170 static void regs_dump__printf(u64 mask, u64 *regs) 1171 { 1172 unsigned rid, i = 0; 1173 1174 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { 1175 u64 val = regs[i++]; 1176 1177 printf(".... %-5s 0x%016" PRIx64 "\n", 1178 perf_reg_name(rid), val); 1179 } 1180 } 1181 1182 static const char *regs_abi[] = { 1183 [PERF_SAMPLE_REGS_ABI_NONE] = "none", 1184 [PERF_SAMPLE_REGS_ABI_32] = "32-bit", 1185 [PERF_SAMPLE_REGS_ABI_64] = "64-bit", 1186 }; 1187 1188 static inline const char *regs_dump_abi(struct regs_dump *d) 1189 { 1190 if (d->abi > PERF_SAMPLE_REGS_ABI_64) 1191 return "unknown"; 1192 1193 return regs_abi[d->abi]; 1194 } 1195 1196 static void regs__printf(const char *type, struct regs_dump *regs) 1197 { 1198 u64 mask = regs->mask; 1199 1200 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n", 1201 type, 1202 mask, 1203 regs_dump_abi(regs)); 1204 1205 regs_dump__printf(mask, regs->regs); 1206 } 1207 1208 static void regs_user__printf(struct perf_sample *sample) 1209 { 1210 struct regs_dump *user_regs = &sample->user_regs; 1211 1212 if (user_regs->regs) 1213 regs__printf("user", user_regs); 1214 } 1215 1216 static void regs_intr__printf(struct perf_sample *sample) 1217 { 1218 struct regs_dump *intr_regs = &sample->intr_regs; 1219 1220 if (intr_regs->regs) 1221 regs__printf("intr", intr_regs); 1222 } 1223 1224 static void stack_user__printf(struct stack_dump *dump) 1225 { 1226 printf("... ustack: size %" PRIu64 ", offset 0x%x\n", 1227 dump->size, dump->offset); 1228 } 1229 1230 static void evlist__print_tstamp(struct evlist *evlist, union perf_event *event, struct perf_sample *sample) 1231 { 1232 u64 sample_type = __evlist__combined_sample_type(evlist); 1233 1234 if (event->header.type != PERF_RECORD_SAMPLE && 1235 !evlist__sample_id_all(evlist)) { 1236 fputs("-1 -1 ", stdout); 1237 return; 1238 } 1239 1240 if ((sample_type & PERF_SAMPLE_CPU)) 1241 printf("%u ", sample->cpu); 1242 1243 if (sample_type & PERF_SAMPLE_TIME) 1244 printf("%" PRIu64 " ", sample->time); 1245 } 1246 1247 static void sample_read__printf(struct perf_sample *sample, u64 read_format) 1248 { 1249 printf("... sample_read:\n"); 1250 1251 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1252 printf("...... time enabled %016" PRIx64 "\n", 1253 sample->read.time_enabled); 1254 1255 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1256 printf("...... time running %016" PRIx64 "\n", 1257 sample->read.time_running); 1258 1259 if (read_format & PERF_FORMAT_GROUP) { 1260 u64 i; 1261 1262 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr); 1263 1264 for (i = 0; i < sample->read.group.nr; i++) { 1265 struct sample_read_value *value; 1266 1267 value = &sample->read.group.values[i]; 1268 printf("..... id %016" PRIx64 1269 ", value %016" PRIx64 "\n", 1270 value->id, value->value); 1271 } 1272 } else 1273 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n", 1274 sample->read.one.id, sample->read.one.value); 1275 } 1276 1277 static void dump_event(struct evlist *evlist, union perf_event *event, 1278 u64 file_offset, struct perf_sample *sample) 1279 { 1280 if (!dump_trace) 1281 return; 1282 1283 printf("\n%#" PRIx64 " [%#x]: event: %d\n", 1284 file_offset, event->header.size, event->header.type); 1285 1286 trace_event(event); 1287 if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw) 1288 evlist->trace_event_sample_raw(evlist, event, sample); 1289 1290 if (sample) 1291 evlist__print_tstamp(evlist, event, sample); 1292 1293 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 1294 event->header.size, perf_event__name(event->header.type)); 1295 } 1296 1297 char *get_page_size_name(u64 size, char *str) 1298 { 1299 if (!size || !unit_number__scnprintf(str, PAGE_SIZE_NAME_LEN, size)) 1300 snprintf(str, PAGE_SIZE_NAME_LEN, "%s", "N/A"); 1301 1302 return str; 1303 } 1304 1305 static void dump_sample(struct evsel *evsel, union perf_event *event, 1306 struct perf_sample *sample) 1307 { 1308 u64 sample_type; 1309 char str[PAGE_SIZE_NAME_LEN]; 1310 1311 if (!dump_trace) 1312 return; 1313 1314 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 1315 event->header.misc, sample->pid, sample->tid, sample->ip, 1316 sample->period, sample->addr); 1317 1318 sample_type = evsel->core.attr.sample_type; 1319 1320 if (evsel__has_callchain(evsel)) 1321 callchain__printf(evsel, sample); 1322 1323 if (evsel__has_br_stack(evsel)) 1324 branch_stack__printf(sample, evsel__has_branch_callstack(evsel)); 1325 1326 if (sample_type & PERF_SAMPLE_REGS_USER) 1327 regs_user__printf(sample); 1328 1329 if (sample_type & PERF_SAMPLE_REGS_INTR) 1330 regs_intr__printf(sample); 1331 1332 if (sample_type & PERF_SAMPLE_STACK_USER) 1333 stack_user__printf(&sample->user_stack); 1334 1335 if (sample_type & PERF_SAMPLE_WEIGHT_TYPE) { 1336 printf("... weight: %" PRIu64 "", sample->weight); 1337 if (sample_type & PERF_SAMPLE_WEIGHT_STRUCT) { 1338 printf(",0x%"PRIx16"", sample->ins_lat); 1339 printf(",0x%"PRIx16"", sample->p_stage_cyc); 1340 } 1341 printf("\n"); 1342 } 1343 1344 if (sample_type & PERF_SAMPLE_DATA_SRC) 1345 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src); 1346 1347 if (sample_type & PERF_SAMPLE_PHYS_ADDR) 1348 printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr); 1349 1350 if (sample_type & PERF_SAMPLE_DATA_PAGE_SIZE) 1351 printf(" .. data page size: %s\n", get_page_size_name(sample->data_page_size, str)); 1352 1353 if (sample_type & PERF_SAMPLE_CODE_PAGE_SIZE) 1354 printf(" .. code page size: %s\n", get_page_size_name(sample->code_page_size, str)); 1355 1356 if (sample_type & PERF_SAMPLE_TRANSACTION) 1357 printf("... transaction: %" PRIx64 "\n", sample->transaction); 1358 1359 if (sample_type & PERF_SAMPLE_READ) 1360 sample_read__printf(sample, evsel->core.attr.read_format); 1361 } 1362 1363 static void dump_read(struct evsel *evsel, union perf_event *event) 1364 { 1365 struct perf_record_read *read_event = &event->read; 1366 u64 read_format; 1367 1368 if (!dump_trace) 1369 return; 1370 1371 printf(": %d %d %s %" PRI_lu64 "\n", event->read.pid, event->read.tid, 1372 evsel__name(evsel), event->read.value); 1373 1374 if (!evsel) 1375 return; 1376 1377 read_format = evsel->core.attr.read_format; 1378 1379 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1380 printf("... time enabled : %" PRI_lu64 "\n", read_event->time_enabled); 1381 1382 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1383 printf("... time running : %" PRI_lu64 "\n", read_event->time_running); 1384 1385 if (read_format & PERF_FORMAT_ID) 1386 printf("... id : %" PRI_lu64 "\n", read_event->id); 1387 } 1388 1389 static struct machine *machines__find_for_cpumode(struct machines *machines, 1390 union perf_event *event, 1391 struct perf_sample *sample) 1392 { 1393 if (perf_guest && 1394 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 1395 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) { 1396 u32 pid; 1397 1398 if (event->header.type == PERF_RECORD_MMAP 1399 || event->header.type == PERF_RECORD_MMAP2) 1400 pid = event->mmap.pid; 1401 else 1402 pid = sample->pid; 1403 1404 return machines__find_guest(machines, pid); 1405 } 1406 1407 return &machines->host; 1408 } 1409 1410 static int deliver_sample_value(struct evlist *evlist, 1411 struct perf_tool *tool, 1412 union perf_event *event, 1413 struct perf_sample *sample, 1414 struct sample_read_value *v, 1415 struct machine *machine) 1416 { 1417 struct perf_sample_id *sid = evlist__id2sid(evlist, v->id); 1418 struct evsel *evsel; 1419 1420 if (sid) { 1421 sample->id = v->id; 1422 sample->period = v->value - sid->period; 1423 sid->period = v->value; 1424 } 1425 1426 if (!sid || sid->evsel == NULL) { 1427 ++evlist->stats.nr_unknown_id; 1428 return 0; 1429 } 1430 1431 /* 1432 * There's no reason to deliver sample 1433 * for zero period, bail out. 1434 */ 1435 if (!sample->period) 1436 return 0; 1437 1438 evsel = container_of(sid->evsel, struct evsel, core); 1439 return tool->sample(tool, event, sample, evsel, machine); 1440 } 1441 1442 static int deliver_sample_group(struct evlist *evlist, 1443 struct perf_tool *tool, 1444 union perf_event *event, 1445 struct perf_sample *sample, 1446 struct machine *machine) 1447 { 1448 int ret = -EINVAL; 1449 u64 i; 1450 1451 for (i = 0; i < sample->read.group.nr; i++) { 1452 ret = deliver_sample_value(evlist, tool, event, sample, 1453 &sample->read.group.values[i], 1454 machine); 1455 if (ret) 1456 break; 1457 } 1458 1459 return ret; 1460 } 1461 1462 static int evlist__deliver_sample(struct evlist *evlist, struct perf_tool *tool, 1463 union perf_event *event, struct perf_sample *sample, 1464 struct evsel *evsel, struct machine *machine) 1465 { 1466 /* We know evsel != NULL. */ 1467 u64 sample_type = evsel->core.attr.sample_type; 1468 u64 read_format = evsel->core.attr.read_format; 1469 1470 /* Standard sample delivery. */ 1471 if (!(sample_type & PERF_SAMPLE_READ)) 1472 return tool->sample(tool, event, sample, evsel, machine); 1473 1474 /* For PERF_SAMPLE_READ we have either single or group mode. */ 1475 if (read_format & PERF_FORMAT_GROUP) 1476 return deliver_sample_group(evlist, tool, event, sample, 1477 machine); 1478 else 1479 return deliver_sample_value(evlist, tool, event, sample, 1480 &sample->read.one, machine); 1481 } 1482 1483 static int machines__deliver_event(struct machines *machines, 1484 struct evlist *evlist, 1485 union perf_event *event, 1486 struct perf_sample *sample, 1487 struct perf_tool *tool, u64 file_offset) 1488 { 1489 struct evsel *evsel; 1490 struct machine *machine; 1491 1492 dump_event(evlist, event, file_offset, sample); 1493 1494 evsel = evlist__id2evsel(evlist, sample->id); 1495 1496 machine = machines__find_for_cpumode(machines, event, sample); 1497 1498 switch (event->header.type) { 1499 case PERF_RECORD_SAMPLE: 1500 if (evsel == NULL) { 1501 ++evlist->stats.nr_unknown_id; 1502 return 0; 1503 } 1504 dump_sample(evsel, event, sample); 1505 if (machine == NULL) { 1506 ++evlist->stats.nr_unprocessable_samples; 1507 return 0; 1508 } 1509 return evlist__deliver_sample(evlist, tool, event, sample, evsel, machine); 1510 case PERF_RECORD_MMAP: 1511 return tool->mmap(tool, event, sample, machine); 1512 case PERF_RECORD_MMAP2: 1513 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT) 1514 ++evlist->stats.nr_proc_map_timeout; 1515 return tool->mmap2(tool, event, sample, machine); 1516 case PERF_RECORD_COMM: 1517 return tool->comm(tool, event, sample, machine); 1518 case PERF_RECORD_NAMESPACES: 1519 return tool->namespaces(tool, event, sample, machine); 1520 case PERF_RECORD_CGROUP: 1521 return tool->cgroup(tool, event, sample, machine); 1522 case PERF_RECORD_FORK: 1523 return tool->fork(tool, event, sample, machine); 1524 case PERF_RECORD_EXIT: 1525 return tool->exit(tool, event, sample, machine); 1526 case PERF_RECORD_LOST: 1527 if (tool->lost == perf_event__process_lost) 1528 evlist->stats.total_lost += event->lost.lost; 1529 return tool->lost(tool, event, sample, machine); 1530 case PERF_RECORD_LOST_SAMPLES: 1531 if (tool->lost_samples == perf_event__process_lost_samples) 1532 evlist->stats.total_lost_samples += event->lost_samples.lost; 1533 return tool->lost_samples(tool, event, sample, machine); 1534 case PERF_RECORD_READ: 1535 dump_read(evsel, event); 1536 return tool->read(tool, event, sample, evsel, machine); 1537 case PERF_RECORD_THROTTLE: 1538 return tool->throttle(tool, event, sample, machine); 1539 case PERF_RECORD_UNTHROTTLE: 1540 return tool->unthrottle(tool, event, sample, machine); 1541 case PERF_RECORD_AUX: 1542 if (tool->aux == perf_event__process_aux) { 1543 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) 1544 evlist->stats.total_aux_lost += 1; 1545 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL) 1546 evlist->stats.total_aux_partial += 1; 1547 if (event->aux.flags & PERF_AUX_FLAG_COLLISION) 1548 evlist->stats.total_aux_collision += 1; 1549 } 1550 return tool->aux(tool, event, sample, machine); 1551 case PERF_RECORD_ITRACE_START: 1552 return tool->itrace_start(tool, event, sample, machine); 1553 case PERF_RECORD_SWITCH: 1554 case PERF_RECORD_SWITCH_CPU_WIDE: 1555 return tool->context_switch(tool, event, sample, machine); 1556 case PERF_RECORD_KSYMBOL: 1557 return tool->ksymbol(tool, event, sample, machine); 1558 case PERF_RECORD_BPF_EVENT: 1559 return tool->bpf(tool, event, sample, machine); 1560 case PERF_RECORD_TEXT_POKE: 1561 return tool->text_poke(tool, event, sample, machine); 1562 case PERF_RECORD_AUX_OUTPUT_HW_ID: 1563 return tool->aux_output_hw_id(tool, event, sample, machine); 1564 default: 1565 ++evlist->stats.nr_unknown_events; 1566 return -1; 1567 } 1568 } 1569 1570 static int perf_session__deliver_event(struct perf_session *session, 1571 union perf_event *event, 1572 struct perf_tool *tool, 1573 u64 file_offset) 1574 { 1575 struct perf_sample sample; 1576 int ret = evlist__parse_sample(session->evlist, event, &sample); 1577 1578 if (ret) { 1579 pr_err("Can't parse sample, err = %d\n", ret); 1580 return ret; 1581 } 1582 1583 ret = auxtrace__process_event(session, event, &sample, tool); 1584 if (ret < 0) 1585 return ret; 1586 if (ret > 0) 1587 return 0; 1588 1589 ret = machines__deliver_event(&session->machines, session->evlist, 1590 event, &sample, tool, file_offset); 1591 1592 if (dump_trace && sample.aux_sample.size) 1593 auxtrace__dump_auxtrace_sample(session, &sample); 1594 1595 return ret; 1596 } 1597 1598 static s64 perf_session__process_user_event(struct perf_session *session, 1599 union perf_event *event, 1600 u64 file_offset) 1601 { 1602 struct ordered_events *oe = &session->ordered_events; 1603 struct perf_tool *tool = session->tool; 1604 struct perf_sample sample = { .time = 0, }; 1605 int fd = perf_data__fd(session->data); 1606 int err; 1607 1608 if (event->header.type != PERF_RECORD_COMPRESSED || 1609 tool->compressed == perf_session__process_compressed_event_stub) 1610 dump_event(session->evlist, event, file_offset, &sample); 1611 1612 /* These events are processed right away */ 1613 switch (event->header.type) { 1614 case PERF_RECORD_HEADER_ATTR: 1615 err = tool->attr(tool, event, &session->evlist); 1616 if (err == 0) { 1617 perf_session__set_id_hdr_size(session); 1618 perf_session__set_comm_exec(session); 1619 } 1620 return err; 1621 case PERF_RECORD_EVENT_UPDATE: 1622 return tool->event_update(tool, event, &session->evlist); 1623 case PERF_RECORD_HEADER_EVENT_TYPE: 1624 /* 1625 * Deprecated, but we need to handle it for sake 1626 * of old data files create in pipe mode. 1627 */ 1628 return 0; 1629 case PERF_RECORD_HEADER_TRACING_DATA: 1630 /* 1631 * Setup for reading amidst mmap, but only when we 1632 * are in 'file' mode. The 'pipe' fd is in proper 1633 * place already. 1634 */ 1635 if (!perf_data__is_pipe(session->data)) 1636 lseek(fd, file_offset, SEEK_SET); 1637 return tool->tracing_data(session, event); 1638 case PERF_RECORD_HEADER_BUILD_ID: 1639 return tool->build_id(session, event); 1640 case PERF_RECORD_FINISHED_ROUND: 1641 return tool->finished_round(tool, event, oe); 1642 case PERF_RECORD_ID_INDEX: 1643 return tool->id_index(session, event); 1644 case PERF_RECORD_AUXTRACE_INFO: 1645 return tool->auxtrace_info(session, event); 1646 case PERF_RECORD_AUXTRACE: 1647 /* setup for reading amidst mmap */ 1648 lseek(fd, file_offset + event->header.size, SEEK_SET); 1649 return tool->auxtrace(session, event); 1650 case PERF_RECORD_AUXTRACE_ERROR: 1651 perf_session__auxtrace_error_inc(session, event); 1652 return tool->auxtrace_error(session, event); 1653 case PERF_RECORD_THREAD_MAP: 1654 return tool->thread_map(session, event); 1655 case PERF_RECORD_CPU_MAP: 1656 return tool->cpu_map(session, event); 1657 case PERF_RECORD_STAT_CONFIG: 1658 return tool->stat_config(session, event); 1659 case PERF_RECORD_STAT: 1660 return tool->stat(session, event); 1661 case PERF_RECORD_STAT_ROUND: 1662 return tool->stat_round(session, event); 1663 case PERF_RECORD_TIME_CONV: 1664 session->time_conv = event->time_conv; 1665 return tool->time_conv(session, event); 1666 case PERF_RECORD_HEADER_FEATURE: 1667 return tool->feature(session, event); 1668 case PERF_RECORD_COMPRESSED: 1669 err = tool->compressed(session, event, file_offset); 1670 if (err) 1671 dump_event(session->evlist, event, file_offset, &sample); 1672 return err; 1673 default: 1674 return -EINVAL; 1675 } 1676 } 1677 1678 int perf_session__deliver_synth_event(struct perf_session *session, 1679 union perf_event *event, 1680 struct perf_sample *sample) 1681 { 1682 struct evlist *evlist = session->evlist; 1683 struct perf_tool *tool = session->tool; 1684 1685 events_stats__inc(&evlist->stats, event->header.type); 1686 1687 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1688 return perf_session__process_user_event(session, event, 0); 1689 1690 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0); 1691 } 1692 1693 static void event_swap(union perf_event *event, bool sample_id_all) 1694 { 1695 perf_event__swap_op swap; 1696 1697 swap = perf_event__swap_ops[event->header.type]; 1698 if (swap) 1699 swap(event, sample_id_all); 1700 } 1701 1702 int perf_session__peek_event(struct perf_session *session, off_t file_offset, 1703 void *buf, size_t buf_sz, 1704 union perf_event **event_ptr, 1705 struct perf_sample *sample) 1706 { 1707 union perf_event *event; 1708 size_t hdr_sz, rest; 1709 int fd; 1710 1711 if (session->one_mmap && !session->header.needs_swap) { 1712 event = file_offset - session->one_mmap_offset + 1713 session->one_mmap_addr; 1714 goto out_parse_sample; 1715 } 1716 1717 if (perf_data__is_pipe(session->data)) 1718 return -1; 1719 1720 fd = perf_data__fd(session->data); 1721 hdr_sz = sizeof(struct perf_event_header); 1722 1723 if (buf_sz < hdr_sz) 1724 return -1; 1725 1726 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 || 1727 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz) 1728 return -1; 1729 1730 event = (union perf_event *)buf; 1731 1732 if (session->header.needs_swap) 1733 perf_event_header__bswap(&event->header); 1734 1735 if (event->header.size < hdr_sz || event->header.size > buf_sz) 1736 return -1; 1737 1738 buf += hdr_sz; 1739 rest = event->header.size - hdr_sz; 1740 1741 if (readn(fd, buf, rest) != (ssize_t)rest) 1742 return -1; 1743 1744 if (session->header.needs_swap) 1745 event_swap(event, evlist__sample_id_all(session->evlist)); 1746 1747 out_parse_sample: 1748 1749 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START && 1750 evlist__parse_sample(session->evlist, event, sample)) 1751 return -1; 1752 1753 *event_ptr = event; 1754 1755 return 0; 1756 } 1757 1758 int perf_session__peek_events(struct perf_session *session, u64 offset, 1759 u64 size, peek_events_cb_t cb, void *data) 1760 { 1761 u64 max_offset = offset + size; 1762 char buf[PERF_SAMPLE_MAX_SIZE]; 1763 union perf_event *event; 1764 int err; 1765 1766 do { 1767 err = perf_session__peek_event(session, offset, buf, 1768 PERF_SAMPLE_MAX_SIZE, &event, 1769 NULL); 1770 if (err) 1771 return err; 1772 1773 err = cb(session, event, offset, data); 1774 if (err) 1775 return err; 1776 1777 offset += event->header.size; 1778 if (event->header.type == PERF_RECORD_AUXTRACE) 1779 offset += event->auxtrace.size; 1780 1781 } while (offset < max_offset); 1782 1783 return err; 1784 } 1785 1786 static s64 perf_session__process_event(struct perf_session *session, 1787 union perf_event *event, u64 file_offset) 1788 { 1789 struct evlist *evlist = session->evlist; 1790 struct perf_tool *tool = session->tool; 1791 int ret; 1792 1793 if (session->header.needs_swap) 1794 event_swap(event, evlist__sample_id_all(evlist)); 1795 1796 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1797 return -EINVAL; 1798 1799 events_stats__inc(&evlist->stats, event->header.type); 1800 1801 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1802 return perf_session__process_user_event(session, event, file_offset); 1803 1804 if (tool->ordered_events) { 1805 u64 timestamp = -1ULL; 1806 1807 ret = evlist__parse_sample_timestamp(evlist, event, ×tamp); 1808 if (ret && ret != -1) 1809 return ret; 1810 1811 ret = perf_session__queue_event(session, event, timestamp, file_offset); 1812 if (ret != -ETIME) 1813 return ret; 1814 } 1815 1816 return perf_session__deliver_event(session, event, tool, file_offset); 1817 } 1818 1819 void perf_event_header__bswap(struct perf_event_header *hdr) 1820 { 1821 hdr->type = bswap_32(hdr->type); 1822 hdr->misc = bswap_16(hdr->misc); 1823 hdr->size = bswap_16(hdr->size); 1824 } 1825 1826 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1827 { 1828 return machine__findnew_thread(&session->machines.host, -1, pid); 1829 } 1830 1831 int perf_session__register_idle_thread(struct perf_session *session) 1832 { 1833 struct thread *thread = machine__idle_thread(&session->machines.host); 1834 1835 /* machine__idle_thread() got the thread, so put it */ 1836 thread__put(thread); 1837 return thread ? 0 : -1; 1838 } 1839 1840 static void 1841 perf_session__warn_order(const struct perf_session *session) 1842 { 1843 const struct ordered_events *oe = &session->ordered_events; 1844 struct evsel *evsel; 1845 bool should_warn = true; 1846 1847 evlist__for_each_entry(session->evlist, evsel) { 1848 if (evsel->core.attr.write_backward) 1849 should_warn = false; 1850 } 1851 1852 if (!should_warn) 1853 return; 1854 if (oe->nr_unordered_events != 0) 1855 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events); 1856 } 1857 1858 static void perf_session__warn_about_errors(const struct perf_session *session) 1859 { 1860 const struct events_stats *stats = &session->evlist->stats; 1861 1862 if (session->tool->lost == perf_event__process_lost && 1863 stats->nr_events[PERF_RECORD_LOST] != 0) { 1864 ui__warning("Processed %d events and lost %d chunks!\n\n" 1865 "Check IO/CPU overload!\n\n", 1866 stats->nr_events[0], 1867 stats->nr_events[PERF_RECORD_LOST]); 1868 } 1869 1870 if (session->tool->lost_samples == perf_event__process_lost_samples) { 1871 double drop_rate; 1872 1873 drop_rate = (double)stats->total_lost_samples / 1874 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples); 1875 if (drop_rate > 0.05) { 1876 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n", 1877 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples, 1878 drop_rate * 100.0); 1879 } 1880 } 1881 1882 if (session->tool->aux == perf_event__process_aux && 1883 stats->total_aux_lost != 0) { 1884 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n", 1885 stats->total_aux_lost, 1886 stats->nr_events[PERF_RECORD_AUX]); 1887 } 1888 1889 if (session->tool->aux == perf_event__process_aux && 1890 stats->total_aux_partial != 0) { 1891 bool vmm_exclusive = false; 1892 1893 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive", 1894 &vmm_exclusive); 1895 1896 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n" 1897 "Are you running a KVM guest in the background?%s\n\n", 1898 stats->total_aux_partial, 1899 stats->nr_events[PERF_RECORD_AUX], 1900 vmm_exclusive ? 1901 "\nReloading kvm_intel module with vmm_exclusive=0\n" 1902 "will reduce the gaps to only guest's timeslices." : 1903 ""); 1904 } 1905 1906 if (session->tool->aux == perf_event__process_aux && 1907 stats->total_aux_collision != 0) { 1908 ui__warning("AUX data detected collision %" PRIu64 " times out of %u!\n\n", 1909 stats->total_aux_collision, 1910 stats->nr_events[PERF_RECORD_AUX]); 1911 } 1912 1913 if (stats->nr_unknown_events != 0) { 1914 ui__warning("Found %u unknown events!\n\n" 1915 "Is this an older tool processing a perf.data " 1916 "file generated by a more recent tool?\n\n" 1917 "If that is not the case, consider " 1918 "reporting to linux-kernel@vger.kernel.org.\n\n", 1919 stats->nr_unknown_events); 1920 } 1921 1922 if (stats->nr_unknown_id != 0) { 1923 ui__warning("%u samples with id not present in the header\n", 1924 stats->nr_unknown_id); 1925 } 1926 1927 if (stats->nr_invalid_chains != 0) { 1928 ui__warning("Found invalid callchains!\n\n" 1929 "%u out of %u events were discarded for this reason.\n\n" 1930 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1931 stats->nr_invalid_chains, 1932 stats->nr_events[PERF_RECORD_SAMPLE]); 1933 } 1934 1935 if (stats->nr_unprocessable_samples != 0) { 1936 ui__warning("%u unprocessable samples recorded.\n" 1937 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1938 stats->nr_unprocessable_samples); 1939 } 1940 1941 perf_session__warn_order(session); 1942 1943 events_stats__auxtrace_error_warn(stats); 1944 1945 if (stats->nr_proc_map_timeout != 0) { 1946 ui__warning("%d map information files for pre-existing threads were\n" 1947 "not processed, if there are samples for addresses they\n" 1948 "will not be resolved, you may find out which are these\n" 1949 "threads by running with -v and redirecting the output\n" 1950 "to a file.\n" 1951 "The time limit to process proc map is too short?\n" 1952 "Increase it by --proc-map-timeout\n", 1953 stats->nr_proc_map_timeout); 1954 } 1955 } 1956 1957 static int perf_session__flush_thread_stack(struct thread *thread, 1958 void *p __maybe_unused) 1959 { 1960 return thread_stack__flush(thread); 1961 } 1962 1963 static int perf_session__flush_thread_stacks(struct perf_session *session) 1964 { 1965 return machines__for_each_thread(&session->machines, 1966 perf_session__flush_thread_stack, 1967 NULL); 1968 } 1969 1970 volatile int session_done; 1971 1972 static int __perf_session__process_decomp_events(struct perf_session *session); 1973 1974 static int __perf_session__process_pipe_events(struct perf_session *session) 1975 { 1976 struct ordered_events *oe = &session->ordered_events; 1977 struct perf_tool *tool = session->tool; 1978 union perf_event *event; 1979 uint32_t size, cur_size = 0; 1980 void *buf = NULL; 1981 s64 skip = 0; 1982 u64 head; 1983 ssize_t err; 1984 void *p; 1985 1986 perf_tool__fill_defaults(tool); 1987 1988 head = 0; 1989 cur_size = sizeof(union perf_event); 1990 1991 buf = malloc(cur_size); 1992 if (!buf) 1993 return -errno; 1994 ordered_events__set_copy_on_queue(oe, true); 1995 more: 1996 event = buf; 1997 err = perf_data__read(session->data, event, 1998 sizeof(struct perf_event_header)); 1999 if (err <= 0) { 2000 if (err == 0) 2001 goto done; 2002 2003 pr_err("failed to read event header\n"); 2004 goto out_err; 2005 } 2006 2007 if (session->header.needs_swap) 2008 perf_event_header__bswap(&event->header); 2009 2010 size = event->header.size; 2011 if (size < sizeof(struct perf_event_header)) { 2012 pr_err("bad event header size\n"); 2013 goto out_err; 2014 } 2015 2016 if (size > cur_size) { 2017 void *new = realloc(buf, size); 2018 if (!new) { 2019 pr_err("failed to allocate memory to read event\n"); 2020 goto out_err; 2021 } 2022 buf = new; 2023 cur_size = size; 2024 event = buf; 2025 } 2026 p = event; 2027 p += sizeof(struct perf_event_header); 2028 2029 if (size - sizeof(struct perf_event_header)) { 2030 err = perf_data__read(session->data, p, 2031 size - sizeof(struct perf_event_header)); 2032 if (err <= 0) { 2033 if (err == 0) { 2034 pr_err("unexpected end of event stream\n"); 2035 goto done; 2036 } 2037 2038 pr_err("failed to read event data\n"); 2039 goto out_err; 2040 } 2041 } 2042 2043 if ((skip = perf_session__process_event(session, event, head)) < 0) { 2044 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 2045 head, event->header.size, event->header.type); 2046 err = -EINVAL; 2047 goto out_err; 2048 } 2049 2050 head += size; 2051 2052 if (skip > 0) 2053 head += skip; 2054 2055 err = __perf_session__process_decomp_events(session); 2056 if (err) 2057 goto out_err; 2058 2059 if (!session_done()) 2060 goto more; 2061 done: 2062 /* do the final flush for ordered samples */ 2063 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 2064 if (err) 2065 goto out_err; 2066 err = auxtrace__flush_events(session, tool); 2067 if (err) 2068 goto out_err; 2069 err = perf_session__flush_thread_stacks(session); 2070 out_err: 2071 free(buf); 2072 if (!tool->no_warn) 2073 perf_session__warn_about_errors(session); 2074 ordered_events__free(&session->ordered_events); 2075 auxtrace__free_events(session); 2076 return err; 2077 } 2078 2079 static union perf_event * 2080 prefetch_event(char *buf, u64 head, size_t mmap_size, 2081 bool needs_swap, union perf_event *error) 2082 { 2083 union perf_event *event; 2084 2085 /* 2086 * Ensure we have enough space remaining to read 2087 * the size of the event in the headers. 2088 */ 2089 if (head + sizeof(event->header) > mmap_size) 2090 return NULL; 2091 2092 event = (union perf_event *)(buf + head); 2093 if (needs_swap) 2094 perf_event_header__bswap(&event->header); 2095 2096 if (head + event->header.size <= mmap_size) 2097 return event; 2098 2099 /* We're not fetching the event so swap back again */ 2100 if (needs_swap) 2101 perf_event_header__bswap(&event->header); 2102 2103 pr_debug("%s: head=%#" PRIx64 " event->header_size=%#x, mmap_size=%#zx:" 2104 " fuzzed or compressed perf.data?\n",__func__, head, event->header.size, mmap_size); 2105 2106 return error; 2107 } 2108 2109 static union perf_event * 2110 fetch_mmaped_event(u64 head, size_t mmap_size, char *buf, bool needs_swap) 2111 { 2112 return prefetch_event(buf, head, mmap_size, needs_swap, ERR_PTR(-EINVAL)); 2113 } 2114 2115 static union perf_event * 2116 fetch_decomp_event(u64 head, size_t mmap_size, char *buf, bool needs_swap) 2117 { 2118 return prefetch_event(buf, head, mmap_size, needs_swap, NULL); 2119 } 2120 2121 static int __perf_session__process_decomp_events(struct perf_session *session) 2122 { 2123 s64 skip; 2124 u64 size, file_pos = 0; 2125 struct decomp *decomp = session->decomp_last; 2126 2127 if (!decomp) 2128 return 0; 2129 2130 while (decomp->head < decomp->size && !session_done()) { 2131 union perf_event *event = fetch_decomp_event(decomp->head, decomp->size, decomp->data, 2132 session->header.needs_swap); 2133 2134 if (!event) 2135 break; 2136 2137 size = event->header.size; 2138 2139 if (size < sizeof(struct perf_event_header) || 2140 (skip = perf_session__process_event(session, event, file_pos)) < 0) { 2141 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 2142 decomp->file_pos + decomp->head, event->header.size, event->header.type); 2143 return -EINVAL; 2144 } 2145 2146 if (skip) 2147 size += skip; 2148 2149 decomp->head += size; 2150 } 2151 2152 return 0; 2153 } 2154 2155 /* 2156 * On 64bit we can mmap the data file in one go. No need for tiny mmap 2157 * slices. On 32bit we use 32MB. 2158 */ 2159 #if BITS_PER_LONG == 64 2160 #define MMAP_SIZE ULLONG_MAX 2161 #define NUM_MMAPS 1 2162 #else 2163 #define MMAP_SIZE (32 * 1024 * 1024ULL) 2164 #define NUM_MMAPS 128 2165 #endif 2166 2167 struct reader; 2168 2169 typedef s64 (*reader_cb_t)(struct perf_session *session, 2170 union perf_event *event, 2171 u64 file_offset); 2172 2173 struct reader { 2174 int fd; 2175 u64 data_size; 2176 u64 data_offset; 2177 reader_cb_t process; 2178 bool in_place_update; 2179 char *mmaps[NUM_MMAPS]; 2180 size_t mmap_size; 2181 int mmap_idx; 2182 char *mmap_cur; 2183 u64 file_pos; 2184 u64 file_offset; 2185 u64 head; 2186 }; 2187 2188 static int 2189 reader__process_events(struct reader *rd, struct perf_session *session, 2190 struct ui_progress *prog) 2191 { 2192 u64 data_size = rd->data_size; 2193 u64 page_offset, size; 2194 int err = 0, mmap_prot, mmap_flags; 2195 char *buf, **mmaps = rd->mmaps; 2196 union perf_event *event; 2197 s64 skip; 2198 2199 page_offset = page_size * (rd->data_offset / page_size); 2200 rd->file_offset = page_offset; 2201 rd->head = rd->data_offset - page_offset; 2202 2203 ui_progress__init_size(prog, data_size, "Processing events..."); 2204 2205 data_size += rd->data_offset; 2206 2207 rd->mmap_size = MMAP_SIZE; 2208 if (rd->mmap_size > data_size) { 2209 rd->mmap_size = data_size; 2210 session->one_mmap = true; 2211 } 2212 2213 memset(mmaps, 0, sizeof(rd->mmaps)); 2214 2215 mmap_prot = PROT_READ; 2216 mmap_flags = MAP_SHARED; 2217 2218 if (rd->in_place_update) { 2219 mmap_prot |= PROT_WRITE; 2220 } else if (session->header.needs_swap) { 2221 mmap_prot |= PROT_WRITE; 2222 mmap_flags = MAP_PRIVATE; 2223 } 2224 remap: 2225 buf = mmap(NULL, rd->mmap_size, mmap_prot, mmap_flags, rd->fd, 2226 rd->file_offset); 2227 if (buf == MAP_FAILED) { 2228 pr_err("failed to mmap file\n"); 2229 err = -errno; 2230 goto out; 2231 } 2232 mmaps[rd->mmap_idx] = rd->mmap_cur = buf; 2233 rd->mmap_idx = (rd->mmap_idx + 1) & (ARRAY_SIZE(rd->mmaps) - 1); 2234 rd->file_pos = rd->file_offset + rd->head; 2235 if (session->one_mmap) { 2236 session->one_mmap_addr = buf; 2237 session->one_mmap_offset = rd->file_offset; 2238 } 2239 2240 more: 2241 event = fetch_mmaped_event(rd->head, rd->mmap_size, rd->mmap_cur, 2242 session->header.needs_swap); 2243 if (IS_ERR(event)) 2244 return PTR_ERR(event); 2245 2246 if (!event) { 2247 if (mmaps[rd->mmap_idx]) { 2248 munmap(mmaps[rd->mmap_idx], rd->mmap_size); 2249 mmaps[rd->mmap_idx] = NULL; 2250 } 2251 2252 page_offset = page_size * (rd->head / page_size); 2253 rd->file_offset += page_offset; 2254 rd->head -= page_offset; 2255 goto remap; 2256 } 2257 2258 size = event->header.size; 2259 2260 skip = -EINVAL; 2261 2262 if (size < sizeof(struct perf_event_header) || 2263 (skip = rd->process(session, event, rd->file_pos)) < 0) { 2264 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n", 2265 rd->file_offset + rd->head, event->header.size, 2266 event->header.type, strerror(-skip)); 2267 err = skip; 2268 goto out; 2269 } 2270 2271 if (skip) 2272 size += skip; 2273 2274 rd->head += size; 2275 rd->file_pos += size; 2276 2277 err = __perf_session__process_decomp_events(session); 2278 if (err) 2279 goto out; 2280 2281 ui_progress__update(prog, size); 2282 2283 if (session_done()) 2284 goto out; 2285 2286 if (rd->file_pos < data_size) 2287 goto more; 2288 2289 out: 2290 return err; 2291 } 2292 2293 static s64 process_simple(struct perf_session *session, 2294 union perf_event *event, 2295 u64 file_offset) 2296 { 2297 return perf_session__process_event(session, event, file_offset); 2298 } 2299 2300 static int __perf_session__process_events(struct perf_session *session) 2301 { 2302 struct reader rd = { 2303 .fd = perf_data__fd(session->data), 2304 .data_size = session->header.data_size, 2305 .data_offset = session->header.data_offset, 2306 .process = process_simple, 2307 .in_place_update = session->data->in_place_update, 2308 }; 2309 struct ordered_events *oe = &session->ordered_events; 2310 struct perf_tool *tool = session->tool; 2311 struct ui_progress prog; 2312 int err; 2313 2314 perf_tool__fill_defaults(tool); 2315 2316 if (rd.data_size == 0) 2317 return -1; 2318 2319 ui_progress__init_size(&prog, rd.data_size, "Processing events..."); 2320 2321 err = reader__process_events(&rd, session, &prog); 2322 if (err) 2323 goto out_err; 2324 /* do the final flush for ordered samples */ 2325 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 2326 if (err) 2327 goto out_err; 2328 err = auxtrace__flush_events(session, tool); 2329 if (err) 2330 goto out_err; 2331 err = perf_session__flush_thread_stacks(session); 2332 out_err: 2333 ui_progress__finish(); 2334 if (!tool->no_warn) 2335 perf_session__warn_about_errors(session); 2336 /* 2337 * We may switching perf.data output, make ordered_events 2338 * reusable. 2339 */ 2340 ordered_events__reinit(&session->ordered_events); 2341 auxtrace__free_events(session); 2342 session->one_mmap = false; 2343 return err; 2344 } 2345 2346 int perf_session__process_events(struct perf_session *session) 2347 { 2348 if (perf_session__register_idle_thread(session) < 0) 2349 return -ENOMEM; 2350 2351 if (perf_data__is_pipe(session->data)) 2352 return __perf_session__process_pipe_events(session); 2353 2354 return __perf_session__process_events(session); 2355 } 2356 2357 bool perf_session__has_traces(struct perf_session *session, const char *msg) 2358 { 2359 struct evsel *evsel; 2360 2361 evlist__for_each_entry(session->evlist, evsel) { 2362 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) 2363 return true; 2364 } 2365 2366 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 2367 return false; 2368 } 2369 2370 int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr) 2371 { 2372 char *bracket; 2373 struct ref_reloc_sym *ref; 2374 struct kmap *kmap; 2375 2376 ref = zalloc(sizeof(struct ref_reloc_sym)); 2377 if (ref == NULL) 2378 return -ENOMEM; 2379 2380 ref->name = strdup(symbol_name); 2381 if (ref->name == NULL) { 2382 free(ref); 2383 return -ENOMEM; 2384 } 2385 2386 bracket = strchr(ref->name, ']'); 2387 if (bracket) 2388 *bracket = '\0'; 2389 2390 ref->addr = addr; 2391 2392 kmap = map__kmap(map); 2393 if (kmap) 2394 kmap->ref_reloc_sym = ref; 2395 2396 return 0; 2397 } 2398 2399 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp) 2400 { 2401 return machines__fprintf_dsos(&session->machines, fp); 2402 } 2403 2404 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp, 2405 bool (skip)(struct dso *dso, int parm), int parm) 2406 { 2407 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm); 2408 } 2409 2410 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp, 2411 bool skip_empty) 2412 { 2413 size_t ret; 2414 const char *msg = ""; 2415 2416 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE)) 2417 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)"; 2418 2419 ret = fprintf(fp, "\nAggregated stats:%s\n", msg); 2420 2421 ret += events_stats__fprintf(&session->evlist->stats, fp, skip_empty); 2422 return ret; 2423 } 2424 2425 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 2426 { 2427 /* 2428 * FIXME: Here we have to actually print all the machines in this 2429 * session, not just the host... 2430 */ 2431 return machine__fprintf(&session->machines.host, fp); 2432 } 2433 2434 struct evsel *perf_session__find_first_evtype(struct perf_session *session, 2435 unsigned int type) 2436 { 2437 struct evsel *pos; 2438 2439 evlist__for_each_entry(session->evlist, pos) { 2440 if (pos->core.attr.type == type) 2441 return pos; 2442 } 2443 return NULL; 2444 } 2445 2446 int perf_session__cpu_bitmap(struct perf_session *session, 2447 const char *cpu_list, unsigned long *cpu_bitmap) 2448 { 2449 int i, err = -1; 2450 struct perf_cpu_map *map; 2451 int nr_cpus = min(session->header.env.nr_cpus_avail, MAX_NR_CPUS); 2452 2453 for (i = 0; i < PERF_TYPE_MAX; ++i) { 2454 struct evsel *evsel; 2455 2456 evsel = perf_session__find_first_evtype(session, i); 2457 if (!evsel) 2458 continue; 2459 2460 if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CPU)) { 2461 pr_err("File does not contain CPU events. " 2462 "Remove -C option to proceed.\n"); 2463 return -1; 2464 } 2465 } 2466 2467 map = perf_cpu_map__new(cpu_list); 2468 if (map == NULL) { 2469 pr_err("Invalid cpu_list\n"); 2470 return -1; 2471 } 2472 2473 for (i = 0; i < map->nr; i++) { 2474 int cpu = map->map[i]; 2475 2476 if (cpu >= nr_cpus) { 2477 pr_err("Requested CPU %d too large. " 2478 "Consider raising MAX_NR_CPUS\n", cpu); 2479 goto out_delete_map; 2480 } 2481 2482 set_bit(cpu, cpu_bitmap); 2483 } 2484 2485 err = 0; 2486 2487 out_delete_map: 2488 perf_cpu_map__put(map); 2489 return err; 2490 } 2491 2492 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 2493 bool full) 2494 { 2495 if (session == NULL || fp == NULL) 2496 return; 2497 2498 fprintf(fp, "# ========\n"); 2499 perf_header__fprintf_info(session, fp, full); 2500 fprintf(fp, "# ========\n#\n"); 2501 } 2502 2503 int perf_event__process_id_index(struct perf_session *session, 2504 union perf_event *event) 2505 { 2506 struct evlist *evlist = session->evlist; 2507 struct perf_record_id_index *ie = &event->id_index; 2508 size_t i, nr, max_nr; 2509 2510 max_nr = (ie->header.size - sizeof(struct perf_record_id_index)) / 2511 sizeof(struct id_index_entry); 2512 nr = ie->nr; 2513 if (nr > max_nr) 2514 return -EINVAL; 2515 2516 if (dump_trace) 2517 fprintf(stdout, " nr: %zu\n", nr); 2518 2519 for (i = 0; i < nr; i++) { 2520 struct id_index_entry *e = &ie->entries[i]; 2521 struct perf_sample_id *sid; 2522 2523 if (dump_trace) { 2524 fprintf(stdout, " ... id: %"PRI_lu64, e->id); 2525 fprintf(stdout, " idx: %"PRI_lu64, e->idx); 2526 fprintf(stdout, " cpu: %"PRI_ld64, e->cpu); 2527 fprintf(stdout, " tid: %"PRI_ld64"\n", e->tid); 2528 } 2529 2530 sid = evlist__id2sid(evlist, e->id); 2531 if (!sid) 2532 return -ENOENT; 2533 sid->idx = e->idx; 2534 sid->cpu = e->cpu; 2535 sid->tid = e->tid; 2536 } 2537 return 0; 2538 } 2539