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