1 // SPDX-License-Identifier: GPL-2.0 2 #include <errno.h> 3 #include <inttypes.h> 4 #include <linux/err.h> 5 #include <linux/kernel.h> 6 #include <linux/zalloc.h> 7 #include <api/fs/fs.h> 8 9 #include <byteswap.h> 10 #include <unistd.h> 11 #include <sys/types.h> 12 #include <sys/mman.h> 13 #include <perf/cpumap.h> 14 15 #include "map_symbol.h" 16 #include "branch.h" 17 #include "debug.h" 18 #include "evlist.h" 19 #include "evsel.h" 20 #include "memswap.h" 21 #include "map.h" 22 #include "symbol.h" 23 #include "session.h" 24 #include "tool.h" 25 #include "perf_regs.h" 26 #include "asm/bug.h" 27 #include "auxtrace.h" 28 #include "thread.h" 29 #include "thread-stack.h" 30 #include "sample-raw.h" 31 #include "stat.h" 32 #include "ui/progress.h" 33 #include "../perf.h" 34 #include "arch/common.h" 35 #include <internal/lib.h> 36 37 #ifdef HAVE_ZSTD_SUPPORT 38 static int perf_session__process_compressed_event(struct perf_session *session, 39 union perf_event *event, u64 file_offset) 40 { 41 void *src; 42 size_t decomp_size, src_size; 43 u64 decomp_last_rem = 0; 44 size_t mmap_len, decomp_len = session->header.env.comp_mmap_len; 45 struct decomp *decomp, *decomp_last = session->decomp_last; 46 47 if (decomp_last) { 48 decomp_last_rem = decomp_last->size - decomp_last->head; 49 decomp_len += decomp_last_rem; 50 } 51 52 mmap_len = sizeof(struct decomp) + decomp_len; 53 decomp = mmap(NULL, mmap_len, PROT_READ|PROT_WRITE, 54 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); 55 if (decomp == MAP_FAILED) { 56 pr_err("Couldn't allocate memory for decompression\n"); 57 return -1; 58 } 59 60 decomp->file_pos = file_offset; 61 decomp->mmap_len = mmap_len; 62 decomp->head = 0; 63 64 if (decomp_last_rem) { 65 memcpy(decomp->data, &(decomp_last->data[decomp_last->head]), decomp_last_rem); 66 decomp->size = decomp_last_rem; 67 } 68 69 src = (void *)event + sizeof(struct perf_record_compressed); 70 src_size = event->pack.header.size - sizeof(struct perf_record_compressed); 71 72 decomp_size = zstd_decompress_stream(&(session->zstd_data), src, src_size, 73 &(decomp->data[decomp_last_rem]), decomp_len - decomp_last_rem); 74 if (!decomp_size) { 75 munmap(decomp, mmap_len); 76 pr_err("Couldn't decompress data\n"); 77 return -1; 78 } 79 80 decomp->size += decomp_size; 81 82 if (session->decomp == NULL) { 83 session->decomp = decomp; 84 session->decomp_last = decomp; 85 } else { 86 session->decomp_last->next = decomp; 87 session->decomp_last = decomp; 88 } 89 90 pr_debug("decomp (B): %zd to %zd\n", src_size, decomp_size); 91 92 return 0; 93 } 94 #else /* !HAVE_ZSTD_SUPPORT */ 95 #define perf_session__process_compressed_event perf_session__process_compressed_event_stub 96 #endif 97 98 static int perf_session__deliver_event(struct perf_session *session, 99 union perf_event *event, 100 struct perf_tool *tool, 101 u64 file_offset); 102 103 static int perf_session__open(struct perf_session *session) 104 { 105 struct perf_data *data = session->data; 106 107 if (perf_session__read_header(session) < 0) { 108 pr_err("incompatible file format (rerun with -v to learn more)\n"); 109 return -1; 110 } 111 112 if (perf_data__is_pipe(data)) 113 return 0; 114 115 if (perf_header__has_feat(&session->header, HEADER_STAT)) 116 return 0; 117 118 if (!evlist__valid_sample_type(session->evlist)) { 119 pr_err("non matching sample_type\n"); 120 return -1; 121 } 122 123 if (!evlist__valid_sample_id_all(session->evlist)) { 124 pr_err("non matching sample_id_all\n"); 125 return -1; 126 } 127 128 if (!perf_evlist__valid_read_format(session->evlist)) { 129 pr_err("non matching read_format\n"); 130 return -1; 131 } 132 133 return 0; 134 } 135 136 void perf_session__set_id_hdr_size(struct perf_session *session) 137 { 138 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist); 139 140 machines__set_id_hdr_size(&session->machines, id_hdr_size); 141 } 142 143 int perf_session__create_kernel_maps(struct perf_session *session) 144 { 145 int ret = machine__create_kernel_maps(&session->machines.host); 146 147 if (ret >= 0) 148 ret = machines__create_guest_kernel_maps(&session->machines); 149 return ret; 150 } 151 152 static void perf_session__destroy_kernel_maps(struct perf_session *session) 153 { 154 machines__destroy_kernel_maps(&session->machines); 155 } 156 157 static bool perf_session__has_comm_exec(struct perf_session *session) 158 { 159 struct evsel *evsel; 160 161 evlist__for_each_entry(session->evlist, evsel) { 162 if (evsel->core.attr.comm_exec) 163 return true; 164 } 165 166 return false; 167 } 168 169 static void perf_session__set_comm_exec(struct perf_session *session) 170 { 171 bool comm_exec = perf_session__has_comm_exec(session); 172 173 machines__set_comm_exec(&session->machines, comm_exec); 174 } 175 176 static int ordered_events__deliver_event(struct ordered_events *oe, 177 struct ordered_event *event) 178 { 179 struct perf_session *session = container_of(oe, struct perf_session, 180 ordered_events); 181 182 return perf_session__deliver_event(session, event->event, 183 session->tool, event->file_offset); 184 } 185 186 struct perf_session *perf_session__new(struct perf_data *data, 187 bool repipe, struct perf_tool *tool) 188 { 189 int ret = -ENOMEM; 190 struct perf_session *session = zalloc(sizeof(*session)); 191 192 if (!session) 193 goto out; 194 195 session->repipe = repipe; 196 session->tool = tool; 197 INIT_LIST_HEAD(&session->auxtrace_index); 198 machines__init(&session->machines); 199 ordered_events__init(&session->ordered_events, 200 ordered_events__deliver_event, NULL); 201 202 perf_env__init(&session->header.env); 203 if (data) { 204 ret = perf_data__open(data); 205 if (ret < 0) 206 goto out_delete; 207 208 session->data = data; 209 210 if (perf_data__is_read(data)) { 211 ret = perf_session__open(session); 212 if (ret < 0) 213 goto out_delete; 214 215 /* 216 * set session attributes that are present in perf.data 217 * but not in pipe-mode. 218 */ 219 if (!data->is_pipe) { 220 perf_session__set_id_hdr_size(session); 221 perf_session__set_comm_exec(session); 222 } 223 224 perf_evlist__init_trace_event_sample_raw(session->evlist); 225 226 /* Open the directory data. */ 227 if (data->is_dir) { 228 ret = perf_data__open_dir(data); 229 if (ret) 230 goto out_delete; 231 } 232 233 if (!symbol_conf.kallsyms_name && 234 !symbol_conf.vmlinux_name) 235 symbol_conf.kallsyms_name = perf_data__kallsyms_name(data); 236 } 237 } else { 238 session->machines.host.env = &perf_env; 239 } 240 241 session->machines.host.single_address_space = 242 perf_env__single_address_space(session->machines.host.env); 243 244 if (!data || perf_data__is_write(data)) { 245 /* 246 * In O_RDONLY mode this will be performed when reading the 247 * kernel MMAP event, in perf_event__process_mmap(). 248 */ 249 if (perf_session__create_kernel_maps(session) < 0) 250 pr_warning("Cannot read kernel map\n"); 251 } 252 253 /* 254 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is 255 * processed, so evlist__sample_id_all is not meaningful here. 256 */ 257 if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps && 258 tool->ordered_events && !evlist__sample_id_all(session->evlist)) { 259 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); 260 tool->ordered_events = false; 261 } 262 263 return session; 264 265 out_delete: 266 perf_session__delete(session); 267 out: 268 return ERR_PTR(ret); 269 } 270 271 static void perf_session__delete_threads(struct perf_session *session) 272 { 273 machine__delete_threads(&session->machines.host); 274 } 275 276 static void perf_session__release_decomp_events(struct perf_session *session) 277 { 278 struct decomp *next, *decomp; 279 size_t mmap_len; 280 next = session->decomp; 281 do { 282 decomp = next; 283 if (decomp == NULL) 284 break; 285 next = decomp->next; 286 mmap_len = decomp->mmap_len; 287 munmap(decomp, mmap_len); 288 } while (1); 289 } 290 291 void perf_session__delete(struct perf_session *session) 292 { 293 if (session == NULL) 294 return; 295 auxtrace__free(session); 296 auxtrace_index__free(&session->auxtrace_index); 297 perf_session__destroy_kernel_maps(session); 298 perf_session__delete_threads(session); 299 perf_session__release_decomp_events(session); 300 perf_env__exit(&session->header.env); 301 machines__exit(&session->machines); 302 if (session->data) 303 perf_data__close(session->data); 304 free(session); 305 } 306 307 static int process_event_synth_tracing_data_stub(struct perf_session *session 308 __maybe_unused, 309 union perf_event *event 310 __maybe_unused) 311 { 312 dump_printf(": unhandled!\n"); 313 return 0; 314 } 315 316 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused, 317 union perf_event *event __maybe_unused, 318 struct evlist **pevlist 319 __maybe_unused) 320 { 321 dump_printf(": unhandled!\n"); 322 return 0; 323 } 324 325 static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused, 326 union perf_event *event __maybe_unused, 327 struct evlist **pevlist 328 __maybe_unused) 329 { 330 if (dump_trace) 331 perf_event__fprintf_event_update(event, stdout); 332 333 dump_printf(": unhandled!\n"); 334 return 0; 335 } 336 337 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused, 338 union perf_event *event __maybe_unused, 339 struct perf_sample *sample __maybe_unused, 340 struct evsel *evsel __maybe_unused, 341 struct machine *machine __maybe_unused) 342 { 343 dump_printf(": unhandled!\n"); 344 return 0; 345 } 346 347 static int process_event_stub(struct perf_tool *tool __maybe_unused, 348 union perf_event *event __maybe_unused, 349 struct perf_sample *sample __maybe_unused, 350 struct machine *machine __maybe_unused) 351 { 352 dump_printf(": unhandled!\n"); 353 return 0; 354 } 355 356 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused, 357 union perf_event *event __maybe_unused, 358 struct ordered_events *oe __maybe_unused) 359 { 360 dump_printf(": unhandled!\n"); 361 return 0; 362 } 363 364 static int process_finished_round(struct perf_tool *tool, 365 union perf_event *event, 366 struct ordered_events *oe); 367 368 static int skipn(int fd, off_t n) 369 { 370 char buf[4096]; 371 ssize_t ret; 372 373 while (n > 0) { 374 ret = read(fd, buf, min(n, (off_t)sizeof(buf))); 375 if (ret <= 0) 376 return ret; 377 n -= ret; 378 } 379 380 return 0; 381 } 382 383 static s64 process_event_auxtrace_stub(struct perf_session *session __maybe_unused, 384 union perf_event *event) 385 { 386 dump_printf(": unhandled!\n"); 387 if (perf_data__is_pipe(session->data)) 388 skipn(perf_data__fd(session->data), event->auxtrace.size); 389 return event->auxtrace.size; 390 } 391 392 static int process_event_op2_stub(struct perf_session *session __maybe_unused, 393 union perf_event *event __maybe_unused) 394 { 395 dump_printf(": unhandled!\n"); 396 return 0; 397 } 398 399 400 static 401 int process_event_thread_map_stub(struct perf_session *session __maybe_unused, 402 union perf_event *event __maybe_unused) 403 { 404 if (dump_trace) 405 perf_event__fprintf_thread_map(event, stdout); 406 407 dump_printf(": unhandled!\n"); 408 return 0; 409 } 410 411 static 412 int process_event_cpu_map_stub(struct perf_session *session __maybe_unused, 413 union perf_event *event __maybe_unused) 414 { 415 if (dump_trace) 416 perf_event__fprintf_cpu_map(event, stdout); 417 418 dump_printf(": unhandled!\n"); 419 return 0; 420 } 421 422 static 423 int process_event_stat_config_stub(struct perf_session *session __maybe_unused, 424 union perf_event *event __maybe_unused) 425 { 426 if (dump_trace) 427 perf_event__fprintf_stat_config(event, stdout); 428 429 dump_printf(": unhandled!\n"); 430 return 0; 431 } 432 433 static int process_stat_stub(struct perf_session *perf_session __maybe_unused, 434 union perf_event *event) 435 { 436 if (dump_trace) 437 perf_event__fprintf_stat(event, stdout); 438 439 dump_printf(": unhandled!\n"); 440 return 0; 441 } 442 443 static int process_stat_round_stub(struct perf_session *perf_session __maybe_unused, 444 union perf_event *event) 445 { 446 if (dump_trace) 447 perf_event__fprintf_stat_round(event, stdout); 448 449 dump_printf(": unhandled!\n"); 450 return 0; 451 } 452 453 static int perf_session__process_compressed_event_stub(struct perf_session *session __maybe_unused, 454 union perf_event *event __maybe_unused, 455 u64 file_offset __maybe_unused) 456 { 457 dump_printf(": unhandled!\n"); 458 return 0; 459 } 460 461 void perf_tool__fill_defaults(struct perf_tool *tool) 462 { 463 if (tool->sample == NULL) 464 tool->sample = process_event_sample_stub; 465 if (tool->mmap == NULL) 466 tool->mmap = process_event_stub; 467 if (tool->mmap2 == NULL) 468 tool->mmap2 = process_event_stub; 469 if (tool->comm == NULL) 470 tool->comm = process_event_stub; 471 if (tool->namespaces == NULL) 472 tool->namespaces = process_event_stub; 473 if (tool->cgroup == NULL) 474 tool->cgroup = process_event_stub; 475 if (tool->fork == NULL) 476 tool->fork = process_event_stub; 477 if (tool->exit == NULL) 478 tool->exit = process_event_stub; 479 if (tool->lost == NULL) 480 tool->lost = perf_event__process_lost; 481 if (tool->lost_samples == NULL) 482 tool->lost_samples = perf_event__process_lost_samples; 483 if (tool->aux == NULL) 484 tool->aux = perf_event__process_aux; 485 if (tool->itrace_start == NULL) 486 tool->itrace_start = perf_event__process_itrace_start; 487 if (tool->context_switch == NULL) 488 tool->context_switch = perf_event__process_switch; 489 if (tool->ksymbol == NULL) 490 tool->ksymbol = perf_event__process_ksymbol; 491 if (tool->bpf == NULL) 492 tool->bpf = perf_event__process_bpf; 493 if (tool->text_poke == NULL) 494 tool->text_poke = perf_event__process_text_poke; 495 if (tool->read == NULL) 496 tool->read = process_event_sample_stub; 497 if (tool->throttle == NULL) 498 tool->throttle = process_event_stub; 499 if (tool->unthrottle == NULL) 500 tool->unthrottle = process_event_stub; 501 if (tool->attr == NULL) 502 tool->attr = process_event_synth_attr_stub; 503 if (tool->event_update == NULL) 504 tool->event_update = process_event_synth_event_update_stub; 505 if (tool->tracing_data == NULL) 506 tool->tracing_data = process_event_synth_tracing_data_stub; 507 if (tool->build_id == NULL) 508 tool->build_id = process_event_op2_stub; 509 if (tool->finished_round == NULL) { 510 if (tool->ordered_events) 511 tool->finished_round = process_finished_round; 512 else 513 tool->finished_round = process_finished_round_stub; 514 } 515 if (tool->id_index == NULL) 516 tool->id_index = process_event_op2_stub; 517 if (tool->auxtrace_info == NULL) 518 tool->auxtrace_info = process_event_op2_stub; 519 if (tool->auxtrace == NULL) 520 tool->auxtrace = process_event_auxtrace_stub; 521 if (tool->auxtrace_error == NULL) 522 tool->auxtrace_error = process_event_op2_stub; 523 if (tool->thread_map == NULL) 524 tool->thread_map = process_event_thread_map_stub; 525 if (tool->cpu_map == NULL) 526 tool->cpu_map = process_event_cpu_map_stub; 527 if (tool->stat_config == NULL) 528 tool->stat_config = process_event_stat_config_stub; 529 if (tool->stat == NULL) 530 tool->stat = process_stat_stub; 531 if (tool->stat_round == NULL) 532 tool->stat_round = process_stat_round_stub; 533 if (tool->time_conv == NULL) 534 tool->time_conv = process_event_op2_stub; 535 if (tool->feature == NULL) 536 tool->feature = process_event_op2_stub; 537 if (tool->compressed == NULL) 538 tool->compressed = perf_session__process_compressed_event; 539 } 540 541 static void swap_sample_id_all(union perf_event *event, void *data) 542 { 543 void *end = (void *) event + event->header.size; 544 int size = end - data; 545 546 BUG_ON(size % sizeof(u64)); 547 mem_bswap_64(data, size); 548 } 549 550 static void perf_event__all64_swap(union perf_event *event, 551 bool sample_id_all __maybe_unused) 552 { 553 struct perf_event_header *hdr = &event->header; 554 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 555 } 556 557 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 558 { 559 event->comm.pid = bswap_32(event->comm.pid); 560 event->comm.tid = bswap_32(event->comm.tid); 561 562 if (sample_id_all) { 563 void *data = &event->comm.comm; 564 565 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 566 swap_sample_id_all(event, data); 567 } 568 } 569 570 static void perf_event__mmap_swap(union perf_event *event, 571 bool sample_id_all) 572 { 573 event->mmap.pid = bswap_32(event->mmap.pid); 574 event->mmap.tid = bswap_32(event->mmap.tid); 575 event->mmap.start = bswap_64(event->mmap.start); 576 event->mmap.len = bswap_64(event->mmap.len); 577 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 578 579 if (sample_id_all) { 580 void *data = &event->mmap.filename; 581 582 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 583 swap_sample_id_all(event, data); 584 } 585 } 586 587 static void perf_event__mmap2_swap(union perf_event *event, 588 bool sample_id_all) 589 { 590 event->mmap2.pid = bswap_32(event->mmap2.pid); 591 event->mmap2.tid = bswap_32(event->mmap2.tid); 592 event->mmap2.start = bswap_64(event->mmap2.start); 593 event->mmap2.len = bswap_64(event->mmap2.len); 594 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); 595 event->mmap2.maj = bswap_32(event->mmap2.maj); 596 event->mmap2.min = bswap_32(event->mmap2.min); 597 event->mmap2.ino = bswap_64(event->mmap2.ino); 598 599 if (sample_id_all) { 600 void *data = &event->mmap2.filename; 601 602 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 603 swap_sample_id_all(event, data); 604 } 605 } 606 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 607 { 608 event->fork.pid = bswap_32(event->fork.pid); 609 event->fork.tid = bswap_32(event->fork.tid); 610 event->fork.ppid = bswap_32(event->fork.ppid); 611 event->fork.ptid = bswap_32(event->fork.ptid); 612 event->fork.time = bswap_64(event->fork.time); 613 614 if (sample_id_all) 615 swap_sample_id_all(event, &event->fork + 1); 616 } 617 618 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 619 { 620 event->read.pid = bswap_32(event->read.pid); 621 event->read.tid = bswap_32(event->read.tid); 622 event->read.value = bswap_64(event->read.value); 623 event->read.time_enabled = bswap_64(event->read.time_enabled); 624 event->read.time_running = bswap_64(event->read.time_running); 625 event->read.id = bswap_64(event->read.id); 626 627 if (sample_id_all) 628 swap_sample_id_all(event, &event->read + 1); 629 } 630 631 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all) 632 { 633 event->aux.aux_offset = bswap_64(event->aux.aux_offset); 634 event->aux.aux_size = bswap_64(event->aux.aux_size); 635 event->aux.flags = bswap_64(event->aux.flags); 636 637 if (sample_id_all) 638 swap_sample_id_all(event, &event->aux + 1); 639 } 640 641 static void perf_event__itrace_start_swap(union perf_event *event, 642 bool sample_id_all) 643 { 644 event->itrace_start.pid = bswap_32(event->itrace_start.pid); 645 event->itrace_start.tid = bswap_32(event->itrace_start.tid); 646 647 if (sample_id_all) 648 swap_sample_id_all(event, &event->itrace_start + 1); 649 } 650 651 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all) 652 { 653 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) { 654 event->context_switch.next_prev_pid = 655 bswap_32(event->context_switch.next_prev_pid); 656 event->context_switch.next_prev_tid = 657 bswap_32(event->context_switch.next_prev_tid); 658 } 659 660 if (sample_id_all) 661 swap_sample_id_all(event, &event->context_switch + 1); 662 } 663 664 static void perf_event__text_poke_swap(union perf_event *event, bool sample_id_all) 665 { 666 event->text_poke.addr = bswap_64(event->text_poke.addr); 667 event->text_poke.old_len = bswap_16(event->text_poke.old_len); 668 event->text_poke.new_len = bswap_16(event->text_poke.new_len); 669 670 if (sample_id_all) { 671 size_t len = sizeof(event->text_poke.old_len) + 672 sizeof(event->text_poke.new_len) + 673 event->text_poke.old_len + 674 event->text_poke.new_len; 675 void *data = &event->text_poke.old_len; 676 677 data += PERF_ALIGN(len, sizeof(u64)); 678 swap_sample_id_all(event, data); 679 } 680 } 681 682 static void perf_event__throttle_swap(union perf_event *event, 683 bool sample_id_all) 684 { 685 event->throttle.time = bswap_64(event->throttle.time); 686 event->throttle.id = bswap_64(event->throttle.id); 687 event->throttle.stream_id = bswap_64(event->throttle.stream_id); 688 689 if (sample_id_all) 690 swap_sample_id_all(event, &event->throttle + 1); 691 } 692 693 static void perf_event__namespaces_swap(union perf_event *event, 694 bool sample_id_all) 695 { 696 u64 i; 697 698 event->namespaces.pid = bswap_32(event->namespaces.pid); 699 event->namespaces.tid = bswap_32(event->namespaces.tid); 700 event->namespaces.nr_namespaces = bswap_64(event->namespaces.nr_namespaces); 701 702 for (i = 0; i < event->namespaces.nr_namespaces; i++) { 703 struct perf_ns_link_info *ns = &event->namespaces.link_info[i]; 704 705 ns->dev = bswap_64(ns->dev); 706 ns->ino = bswap_64(ns->ino); 707 } 708 709 if (sample_id_all) 710 swap_sample_id_all(event, &event->namespaces.link_info[i]); 711 } 712 713 static u8 revbyte(u8 b) 714 { 715 int rev = (b >> 4) | ((b & 0xf) << 4); 716 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 717 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 718 return (u8) rev; 719 } 720 721 /* 722 * XXX this is hack in attempt to carry flags bitfield 723 * through endian village. ABI says: 724 * 725 * Bit-fields are allocated from right to left (least to most significant) 726 * on little-endian implementations and from left to right (most to least 727 * significant) on big-endian implementations. 728 * 729 * The above seems to be byte specific, so we need to reverse each 730 * byte of the bitfield. 'Internet' also says this might be implementation 731 * specific and we probably need proper fix and carry perf_event_attr 732 * bitfield flags in separate data file FEAT_ section. Thought this seems 733 * to work for now. 734 */ 735 static void swap_bitfield(u8 *p, unsigned len) 736 { 737 unsigned i; 738 739 for (i = 0; i < len; i++) { 740 *p = revbyte(*p); 741 p++; 742 } 743 } 744 745 /* exported for swapping attributes in file header */ 746 void perf_event__attr_swap(struct perf_event_attr *attr) 747 { 748 attr->type = bswap_32(attr->type); 749 attr->size = bswap_32(attr->size); 750 751 #define bswap_safe(f, n) \ 752 (attr->size > (offsetof(struct perf_event_attr, f) + \ 753 sizeof(attr->f) * (n))) 754 #define bswap_field(f, sz) \ 755 do { \ 756 if (bswap_safe(f, 0)) \ 757 attr->f = bswap_##sz(attr->f); \ 758 } while(0) 759 #define bswap_field_16(f) bswap_field(f, 16) 760 #define bswap_field_32(f) bswap_field(f, 32) 761 #define bswap_field_64(f) bswap_field(f, 64) 762 763 bswap_field_64(config); 764 bswap_field_64(sample_period); 765 bswap_field_64(sample_type); 766 bswap_field_64(read_format); 767 bswap_field_32(wakeup_events); 768 bswap_field_32(bp_type); 769 bswap_field_64(bp_addr); 770 bswap_field_64(bp_len); 771 bswap_field_64(branch_sample_type); 772 bswap_field_64(sample_regs_user); 773 bswap_field_32(sample_stack_user); 774 bswap_field_32(aux_watermark); 775 bswap_field_16(sample_max_stack); 776 bswap_field_32(aux_sample_size); 777 778 /* 779 * After read_format are bitfields. Check read_format because 780 * we are unable to use offsetof on bitfield. 781 */ 782 if (bswap_safe(read_format, 1)) 783 swap_bitfield((u8 *) (&attr->read_format + 1), 784 sizeof(u64)); 785 #undef bswap_field_64 786 #undef bswap_field_32 787 #undef bswap_field 788 #undef bswap_safe 789 } 790 791 static void perf_event__hdr_attr_swap(union perf_event *event, 792 bool sample_id_all __maybe_unused) 793 { 794 size_t size; 795 796 perf_event__attr_swap(&event->attr.attr); 797 798 size = event->header.size; 799 size -= (void *)&event->attr.id - (void *)event; 800 mem_bswap_64(event->attr.id, size); 801 } 802 803 static void perf_event__event_update_swap(union perf_event *event, 804 bool sample_id_all __maybe_unused) 805 { 806 event->event_update.type = bswap_64(event->event_update.type); 807 event->event_update.id = bswap_64(event->event_update.id); 808 } 809 810 static void perf_event__event_type_swap(union perf_event *event, 811 bool sample_id_all __maybe_unused) 812 { 813 event->event_type.event_type.event_id = 814 bswap_64(event->event_type.event_type.event_id); 815 } 816 817 static void perf_event__tracing_data_swap(union perf_event *event, 818 bool sample_id_all __maybe_unused) 819 { 820 event->tracing_data.size = bswap_32(event->tracing_data.size); 821 } 822 823 static void perf_event__auxtrace_info_swap(union perf_event *event, 824 bool sample_id_all __maybe_unused) 825 { 826 size_t size; 827 828 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type); 829 830 size = event->header.size; 831 size -= (void *)&event->auxtrace_info.priv - (void *)event; 832 mem_bswap_64(event->auxtrace_info.priv, size); 833 } 834 835 static void perf_event__auxtrace_swap(union perf_event *event, 836 bool sample_id_all __maybe_unused) 837 { 838 event->auxtrace.size = bswap_64(event->auxtrace.size); 839 event->auxtrace.offset = bswap_64(event->auxtrace.offset); 840 event->auxtrace.reference = bswap_64(event->auxtrace.reference); 841 event->auxtrace.idx = bswap_32(event->auxtrace.idx); 842 event->auxtrace.tid = bswap_32(event->auxtrace.tid); 843 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu); 844 } 845 846 static void perf_event__auxtrace_error_swap(union perf_event *event, 847 bool sample_id_all __maybe_unused) 848 { 849 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type); 850 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code); 851 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu); 852 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid); 853 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid); 854 event->auxtrace_error.fmt = bswap_32(event->auxtrace_error.fmt); 855 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip); 856 if (event->auxtrace_error.fmt) 857 event->auxtrace_error.time = bswap_64(event->auxtrace_error.time); 858 } 859 860 static void perf_event__thread_map_swap(union perf_event *event, 861 bool sample_id_all __maybe_unused) 862 { 863 unsigned i; 864 865 event->thread_map.nr = bswap_64(event->thread_map.nr); 866 867 for (i = 0; i < event->thread_map.nr; i++) 868 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid); 869 } 870 871 static void perf_event__cpu_map_swap(union perf_event *event, 872 bool sample_id_all __maybe_unused) 873 { 874 struct perf_record_cpu_map_data *data = &event->cpu_map.data; 875 struct cpu_map_entries *cpus; 876 struct perf_record_record_cpu_map *mask; 877 unsigned i; 878 879 data->type = bswap_64(data->type); 880 881 switch (data->type) { 882 case PERF_CPU_MAP__CPUS: 883 cpus = (struct cpu_map_entries *)data->data; 884 885 cpus->nr = bswap_16(cpus->nr); 886 887 for (i = 0; i < cpus->nr; i++) 888 cpus->cpu[i] = bswap_16(cpus->cpu[i]); 889 break; 890 case PERF_CPU_MAP__MASK: 891 mask = (struct perf_record_record_cpu_map *)data->data; 892 893 mask->nr = bswap_16(mask->nr); 894 mask->long_size = bswap_16(mask->long_size); 895 896 switch (mask->long_size) { 897 case 4: mem_bswap_32(&mask->mask, mask->nr); break; 898 case 8: mem_bswap_64(&mask->mask, mask->nr); break; 899 default: 900 pr_err("cpu_map swap: unsupported long size\n"); 901 } 902 default: 903 break; 904 } 905 } 906 907 static void perf_event__stat_config_swap(union perf_event *event, 908 bool sample_id_all __maybe_unused) 909 { 910 u64 size; 911 912 size = event->stat_config.nr * sizeof(event->stat_config.data[0]); 913 size += 1; /* nr item itself */ 914 mem_bswap_64(&event->stat_config.nr, size); 915 } 916 917 static void perf_event__stat_swap(union perf_event *event, 918 bool sample_id_all __maybe_unused) 919 { 920 event->stat.id = bswap_64(event->stat.id); 921 event->stat.thread = bswap_32(event->stat.thread); 922 event->stat.cpu = bswap_32(event->stat.cpu); 923 event->stat.val = bswap_64(event->stat.val); 924 event->stat.ena = bswap_64(event->stat.ena); 925 event->stat.run = bswap_64(event->stat.run); 926 } 927 928 static void perf_event__stat_round_swap(union perf_event *event, 929 bool sample_id_all __maybe_unused) 930 { 931 event->stat_round.type = bswap_64(event->stat_round.type); 932 event->stat_round.time = bswap_64(event->stat_round.time); 933 } 934 935 typedef void (*perf_event__swap_op)(union perf_event *event, 936 bool sample_id_all); 937 938 static perf_event__swap_op perf_event__swap_ops[] = { 939 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 940 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap, 941 [PERF_RECORD_COMM] = perf_event__comm_swap, 942 [PERF_RECORD_FORK] = perf_event__task_swap, 943 [PERF_RECORD_EXIT] = perf_event__task_swap, 944 [PERF_RECORD_LOST] = perf_event__all64_swap, 945 [PERF_RECORD_READ] = perf_event__read_swap, 946 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap, 947 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap, 948 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 949 [PERF_RECORD_AUX] = perf_event__aux_swap, 950 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap, 951 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap, 952 [PERF_RECORD_SWITCH] = perf_event__switch_swap, 953 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap, 954 [PERF_RECORD_NAMESPACES] = perf_event__namespaces_swap, 955 [PERF_RECORD_TEXT_POKE] = perf_event__text_poke_swap, 956 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 957 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 958 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 959 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 960 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap, 961 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap, 962 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap, 963 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap, 964 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap, 965 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap, 966 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap, 967 [PERF_RECORD_STAT] = perf_event__stat_swap, 968 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap, 969 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap, 970 [PERF_RECORD_TIME_CONV] = perf_event__all64_swap, 971 [PERF_RECORD_HEADER_MAX] = NULL, 972 }; 973 974 /* 975 * When perf record finishes a pass on every buffers, it records this pseudo 976 * event. 977 * We record the max timestamp t found in the pass n. 978 * Assuming these timestamps are monotonic across cpus, we know that if 979 * a buffer still has events with timestamps below t, they will be all 980 * available and then read in the pass n + 1. 981 * Hence when we start to read the pass n + 2, we can safely flush every 982 * events with timestamps below t. 983 * 984 * ============ PASS n ================= 985 * CPU 0 | CPU 1 986 * | 987 * cnt1 timestamps | cnt2 timestamps 988 * 1 | 2 989 * 2 | 3 990 * - | 4 <--- max recorded 991 * 992 * ============ PASS n + 1 ============== 993 * CPU 0 | CPU 1 994 * | 995 * cnt1 timestamps | cnt2 timestamps 996 * 3 | 5 997 * 4 | 6 998 * 5 | 7 <---- max recorded 999 * 1000 * Flush every events below timestamp 4 1001 * 1002 * ============ PASS n + 2 ============== 1003 * CPU 0 | CPU 1 1004 * | 1005 * cnt1 timestamps | cnt2 timestamps 1006 * 6 | 8 1007 * 7 | 9 1008 * - | 10 1009 * 1010 * Flush every events below timestamp 7 1011 * etc... 1012 */ 1013 static int process_finished_round(struct perf_tool *tool __maybe_unused, 1014 union perf_event *event __maybe_unused, 1015 struct ordered_events *oe) 1016 { 1017 if (dump_trace) 1018 fprintf(stdout, "\n"); 1019 return ordered_events__flush(oe, OE_FLUSH__ROUND); 1020 } 1021 1022 int perf_session__queue_event(struct perf_session *s, union perf_event *event, 1023 u64 timestamp, u64 file_offset) 1024 { 1025 return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset); 1026 } 1027 1028 static void callchain__lbr_callstack_printf(struct perf_sample *sample) 1029 { 1030 struct ip_callchain *callchain = sample->callchain; 1031 struct branch_stack *lbr_stack = sample->branch_stack; 1032 struct branch_entry *entries = perf_sample__branch_entries(sample); 1033 u64 kernel_callchain_nr = callchain->nr; 1034 unsigned int i; 1035 1036 for (i = 0; i < kernel_callchain_nr; i++) { 1037 if (callchain->ips[i] == PERF_CONTEXT_USER) 1038 break; 1039 } 1040 1041 if ((i != kernel_callchain_nr) && lbr_stack->nr) { 1042 u64 total_nr; 1043 /* 1044 * LBR callstack can only get user call chain, 1045 * i is kernel call chain number, 1046 * 1 is PERF_CONTEXT_USER. 1047 * 1048 * The user call chain is stored in LBR registers. 1049 * LBR are pair registers. The caller is stored 1050 * in "from" register, while the callee is stored 1051 * in "to" register. 1052 * For example, there is a call stack 1053 * "A"->"B"->"C"->"D". 1054 * The LBR registers will recorde like 1055 * "C"->"D", "B"->"C", "A"->"B". 1056 * So only the first "to" register and all "from" 1057 * registers are needed to construct the whole stack. 1058 */ 1059 total_nr = i + 1 + lbr_stack->nr + 1; 1060 kernel_callchain_nr = i + 1; 1061 1062 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr); 1063 1064 for (i = 0; i < kernel_callchain_nr; i++) 1065 printf("..... %2d: %016" PRIx64 "\n", 1066 i, callchain->ips[i]); 1067 1068 printf("..... %2d: %016" PRIx64 "\n", 1069 (int)(kernel_callchain_nr), entries[0].to); 1070 for (i = 0; i < lbr_stack->nr; i++) 1071 printf("..... %2d: %016" PRIx64 "\n", 1072 (int)(i + kernel_callchain_nr + 1), entries[i].from); 1073 } 1074 } 1075 1076 static void callchain__printf(struct evsel *evsel, 1077 struct perf_sample *sample) 1078 { 1079 unsigned int i; 1080 struct ip_callchain *callchain = sample->callchain; 1081 1082 if (evsel__has_branch_callstack(evsel)) 1083 callchain__lbr_callstack_printf(sample); 1084 1085 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr); 1086 1087 for (i = 0; i < callchain->nr; i++) 1088 printf("..... %2d: %016" PRIx64 "\n", 1089 i, callchain->ips[i]); 1090 } 1091 1092 static void branch_stack__printf(struct perf_sample *sample, bool callstack) 1093 { 1094 struct branch_entry *entries = perf_sample__branch_entries(sample); 1095 uint64_t i; 1096 1097 printf("%s: nr:%" PRIu64 "\n", 1098 !callstack ? "... branch stack" : "... branch callstack", 1099 sample->branch_stack->nr); 1100 1101 for (i = 0; i < sample->branch_stack->nr; i++) { 1102 struct branch_entry *e = &entries[i]; 1103 1104 if (!callstack) { 1105 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n", 1106 i, e->from, e->to, 1107 (unsigned short)e->flags.cycles, 1108 e->flags.mispred ? "M" : " ", 1109 e->flags.predicted ? "P" : " ", 1110 e->flags.abort ? "A" : " ", 1111 e->flags.in_tx ? "T" : " ", 1112 (unsigned)e->flags.reserved); 1113 } else { 1114 printf("..... %2"PRIu64": %016" PRIx64 "\n", 1115 i, i > 0 ? e->from : e->to); 1116 } 1117 } 1118 } 1119 1120 static void regs_dump__printf(u64 mask, u64 *regs) 1121 { 1122 unsigned rid, i = 0; 1123 1124 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { 1125 u64 val = regs[i++]; 1126 1127 printf(".... %-5s 0x%016" PRIx64 "\n", 1128 perf_reg_name(rid), val); 1129 } 1130 } 1131 1132 static const char *regs_abi[] = { 1133 [PERF_SAMPLE_REGS_ABI_NONE] = "none", 1134 [PERF_SAMPLE_REGS_ABI_32] = "32-bit", 1135 [PERF_SAMPLE_REGS_ABI_64] = "64-bit", 1136 }; 1137 1138 static inline const char *regs_dump_abi(struct regs_dump *d) 1139 { 1140 if (d->abi > PERF_SAMPLE_REGS_ABI_64) 1141 return "unknown"; 1142 1143 return regs_abi[d->abi]; 1144 } 1145 1146 static void regs__printf(const char *type, struct regs_dump *regs) 1147 { 1148 u64 mask = regs->mask; 1149 1150 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n", 1151 type, 1152 mask, 1153 regs_dump_abi(regs)); 1154 1155 regs_dump__printf(mask, regs->regs); 1156 } 1157 1158 static void regs_user__printf(struct perf_sample *sample) 1159 { 1160 struct regs_dump *user_regs = &sample->user_regs; 1161 1162 if (user_regs->regs) 1163 regs__printf("user", user_regs); 1164 } 1165 1166 static void regs_intr__printf(struct perf_sample *sample) 1167 { 1168 struct regs_dump *intr_regs = &sample->intr_regs; 1169 1170 if (intr_regs->regs) 1171 regs__printf("intr", intr_regs); 1172 } 1173 1174 static void stack_user__printf(struct stack_dump *dump) 1175 { 1176 printf("... ustack: size %" PRIu64 ", offset 0x%x\n", 1177 dump->size, dump->offset); 1178 } 1179 1180 static void perf_evlist__print_tstamp(struct evlist *evlist, 1181 union perf_event *event, 1182 struct perf_sample *sample) 1183 { 1184 u64 sample_type = __evlist__combined_sample_type(evlist); 1185 1186 if (event->header.type != PERF_RECORD_SAMPLE && 1187 !evlist__sample_id_all(evlist)) { 1188 fputs("-1 -1 ", stdout); 1189 return; 1190 } 1191 1192 if ((sample_type & PERF_SAMPLE_CPU)) 1193 printf("%u ", sample->cpu); 1194 1195 if (sample_type & PERF_SAMPLE_TIME) 1196 printf("%" PRIu64 " ", sample->time); 1197 } 1198 1199 static void sample_read__printf(struct perf_sample *sample, u64 read_format) 1200 { 1201 printf("... sample_read:\n"); 1202 1203 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1204 printf("...... time enabled %016" PRIx64 "\n", 1205 sample->read.time_enabled); 1206 1207 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1208 printf("...... time running %016" PRIx64 "\n", 1209 sample->read.time_running); 1210 1211 if (read_format & PERF_FORMAT_GROUP) { 1212 u64 i; 1213 1214 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr); 1215 1216 for (i = 0; i < sample->read.group.nr; i++) { 1217 struct sample_read_value *value; 1218 1219 value = &sample->read.group.values[i]; 1220 printf("..... id %016" PRIx64 1221 ", value %016" PRIx64 "\n", 1222 value->id, value->value); 1223 } 1224 } else 1225 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n", 1226 sample->read.one.id, sample->read.one.value); 1227 } 1228 1229 static void dump_event(struct evlist *evlist, union perf_event *event, 1230 u64 file_offset, struct perf_sample *sample) 1231 { 1232 if (!dump_trace) 1233 return; 1234 1235 printf("\n%#" PRIx64 " [%#x]: event: %d\n", 1236 file_offset, event->header.size, event->header.type); 1237 1238 trace_event(event); 1239 if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw) 1240 evlist->trace_event_sample_raw(evlist, event, sample); 1241 1242 if (sample) 1243 perf_evlist__print_tstamp(evlist, event, sample); 1244 1245 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 1246 event->header.size, perf_event__name(event->header.type)); 1247 } 1248 1249 static void dump_sample(struct evsel *evsel, union perf_event *event, 1250 struct perf_sample *sample) 1251 { 1252 u64 sample_type; 1253 1254 if (!dump_trace) 1255 return; 1256 1257 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 1258 event->header.misc, sample->pid, sample->tid, sample->ip, 1259 sample->period, sample->addr); 1260 1261 sample_type = evsel->core.attr.sample_type; 1262 1263 if (evsel__has_callchain(evsel)) 1264 callchain__printf(evsel, sample); 1265 1266 if (evsel__has_br_stack(evsel)) 1267 branch_stack__printf(sample, evsel__has_branch_callstack(evsel)); 1268 1269 if (sample_type & PERF_SAMPLE_REGS_USER) 1270 regs_user__printf(sample); 1271 1272 if (sample_type & PERF_SAMPLE_REGS_INTR) 1273 regs_intr__printf(sample); 1274 1275 if (sample_type & PERF_SAMPLE_STACK_USER) 1276 stack_user__printf(&sample->user_stack); 1277 1278 if (sample_type & PERF_SAMPLE_WEIGHT) 1279 printf("... weight: %" PRIu64 "\n", sample->weight); 1280 1281 if (sample_type & PERF_SAMPLE_DATA_SRC) 1282 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src); 1283 1284 if (sample_type & PERF_SAMPLE_PHYS_ADDR) 1285 printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr); 1286 1287 if (sample_type & PERF_SAMPLE_TRANSACTION) 1288 printf("... transaction: %" PRIx64 "\n", sample->transaction); 1289 1290 if (sample_type & PERF_SAMPLE_READ) 1291 sample_read__printf(sample, evsel->core.attr.read_format); 1292 } 1293 1294 static void dump_read(struct evsel *evsel, union perf_event *event) 1295 { 1296 struct perf_record_read *read_event = &event->read; 1297 u64 read_format; 1298 1299 if (!dump_trace) 1300 return; 1301 1302 printf(": %d %d %s %" PRI_lu64 "\n", event->read.pid, event->read.tid, 1303 evsel__name(evsel), event->read.value); 1304 1305 if (!evsel) 1306 return; 1307 1308 read_format = evsel->core.attr.read_format; 1309 1310 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1311 printf("... time enabled : %" PRI_lu64 "\n", read_event->time_enabled); 1312 1313 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1314 printf("... time running : %" PRI_lu64 "\n", read_event->time_running); 1315 1316 if (read_format & PERF_FORMAT_ID) 1317 printf("... id : %" PRI_lu64 "\n", read_event->id); 1318 } 1319 1320 static struct machine *machines__find_for_cpumode(struct machines *machines, 1321 union perf_event *event, 1322 struct perf_sample *sample) 1323 { 1324 struct machine *machine; 1325 1326 if (perf_guest && 1327 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 1328 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) { 1329 u32 pid; 1330 1331 if (event->header.type == PERF_RECORD_MMAP 1332 || event->header.type == PERF_RECORD_MMAP2) 1333 pid = event->mmap.pid; 1334 else 1335 pid = sample->pid; 1336 1337 machine = machines__find(machines, pid); 1338 if (!machine) 1339 machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID); 1340 return machine; 1341 } 1342 1343 return &machines->host; 1344 } 1345 1346 static int deliver_sample_value(struct evlist *evlist, 1347 struct perf_tool *tool, 1348 union perf_event *event, 1349 struct perf_sample *sample, 1350 struct sample_read_value *v, 1351 struct machine *machine) 1352 { 1353 struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id); 1354 struct evsel *evsel; 1355 1356 if (sid) { 1357 sample->id = v->id; 1358 sample->period = v->value - sid->period; 1359 sid->period = v->value; 1360 } 1361 1362 if (!sid || sid->evsel == NULL) { 1363 ++evlist->stats.nr_unknown_id; 1364 return 0; 1365 } 1366 1367 /* 1368 * There's no reason to deliver sample 1369 * for zero period, bail out. 1370 */ 1371 if (!sample->period) 1372 return 0; 1373 1374 evsel = container_of(sid->evsel, struct evsel, core); 1375 return tool->sample(tool, event, sample, evsel, machine); 1376 } 1377 1378 static int deliver_sample_group(struct evlist *evlist, 1379 struct perf_tool *tool, 1380 union perf_event *event, 1381 struct perf_sample *sample, 1382 struct machine *machine) 1383 { 1384 int ret = -EINVAL; 1385 u64 i; 1386 1387 for (i = 0; i < sample->read.group.nr; i++) { 1388 ret = deliver_sample_value(evlist, tool, event, sample, 1389 &sample->read.group.values[i], 1390 machine); 1391 if (ret) 1392 break; 1393 } 1394 1395 return ret; 1396 } 1397 1398 static int 1399 perf_evlist__deliver_sample(struct evlist *evlist, 1400 struct perf_tool *tool, 1401 union perf_event *event, 1402 struct perf_sample *sample, 1403 struct evsel *evsel, 1404 struct machine *machine) 1405 { 1406 /* We know evsel != NULL. */ 1407 u64 sample_type = evsel->core.attr.sample_type; 1408 u64 read_format = evsel->core.attr.read_format; 1409 1410 /* Standard sample delivery. */ 1411 if (!(sample_type & PERF_SAMPLE_READ)) 1412 return tool->sample(tool, event, sample, evsel, machine); 1413 1414 /* For PERF_SAMPLE_READ we have either single or group mode. */ 1415 if (read_format & PERF_FORMAT_GROUP) 1416 return deliver_sample_group(evlist, tool, event, sample, 1417 machine); 1418 else 1419 return deliver_sample_value(evlist, tool, event, sample, 1420 &sample->read.one, machine); 1421 } 1422 1423 static int machines__deliver_event(struct machines *machines, 1424 struct evlist *evlist, 1425 union perf_event *event, 1426 struct perf_sample *sample, 1427 struct perf_tool *tool, u64 file_offset) 1428 { 1429 struct evsel *evsel; 1430 struct machine *machine; 1431 1432 dump_event(evlist, event, file_offset, sample); 1433 1434 evsel = perf_evlist__id2evsel(evlist, sample->id); 1435 1436 machine = machines__find_for_cpumode(machines, event, sample); 1437 1438 switch (event->header.type) { 1439 case PERF_RECORD_SAMPLE: 1440 if (evsel == NULL) { 1441 ++evlist->stats.nr_unknown_id; 1442 return 0; 1443 } 1444 dump_sample(evsel, event, sample); 1445 if (machine == NULL) { 1446 ++evlist->stats.nr_unprocessable_samples; 1447 return 0; 1448 } 1449 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine); 1450 case PERF_RECORD_MMAP: 1451 return tool->mmap(tool, event, sample, machine); 1452 case PERF_RECORD_MMAP2: 1453 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT) 1454 ++evlist->stats.nr_proc_map_timeout; 1455 return tool->mmap2(tool, event, sample, machine); 1456 case PERF_RECORD_COMM: 1457 return tool->comm(tool, event, sample, machine); 1458 case PERF_RECORD_NAMESPACES: 1459 return tool->namespaces(tool, event, sample, machine); 1460 case PERF_RECORD_CGROUP: 1461 return tool->cgroup(tool, event, sample, machine); 1462 case PERF_RECORD_FORK: 1463 return tool->fork(tool, event, sample, machine); 1464 case PERF_RECORD_EXIT: 1465 return tool->exit(tool, event, sample, machine); 1466 case PERF_RECORD_LOST: 1467 if (tool->lost == perf_event__process_lost) 1468 evlist->stats.total_lost += event->lost.lost; 1469 return tool->lost(tool, event, sample, machine); 1470 case PERF_RECORD_LOST_SAMPLES: 1471 if (tool->lost_samples == perf_event__process_lost_samples) 1472 evlist->stats.total_lost_samples += event->lost_samples.lost; 1473 return tool->lost_samples(tool, event, sample, machine); 1474 case PERF_RECORD_READ: 1475 dump_read(evsel, event); 1476 return tool->read(tool, event, sample, evsel, machine); 1477 case PERF_RECORD_THROTTLE: 1478 return tool->throttle(tool, event, sample, machine); 1479 case PERF_RECORD_UNTHROTTLE: 1480 return tool->unthrottle(tool, event, sample, machine); 1481 case PERF_RECORD_AUX: 1482 if (tool->aux == perf_event__process_aux) { 1483 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) 1484 evlist->stats.total_aux_lost += 1; 1485 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL) 1486 evlist->stats.total_aux_partial += 1; 1487 } 1488 return tool->aux(tool, event, sample, machine); 1489 case PERF_RECORD_ITRACE_START: 1490 return tool->itrace_start(tool, event, sample, machine); 1491 case PERF_RECORD_SWITCH: 1492 case PERF_RECORD_SWITCH_CPU_WIDE: 1493 return tool->context_switch(tool, event, sample, machine); 1494 case PERF_RECORD_KSYMBOL: 1495 return tool->ksymbol(tool, event, sample, machine); 1496 case PERF_RECORD_BPF_EVENT: 1497 return tool->bpf(tool, event, sample, machine); 1498 case PERF_RECORD_TEXT_POKE: 1499 return tool->text_poke(tool, event, sample, machine); 1500 default: 1501 ++evlist->stats.nr_unknown_events; 1502 return -1; 1503 } 1504 } 1505 1506 static int perf_session__deliver_event(struct perf_session *session, 1507 union perf_event *event, 1508 struct perf_tool *tool, 1509 u64 file_offset) 1510 { 1511 struct perf_sample sample; 1512 int ret; 1513 1514 ret = perf_evlist__parse_sample(session->evlist, event, &sample); 1515 if (ret) { 1516 pr_err("Can't parse sample, err = %d\n", ret); 1517 return ret; 1518 } 1519 1520 ret = auxtrace__process_event(session, event, &sample, tool); 1521 if (ret < 0) 1522 return ret; 1523 if (ret > 0) 1524 return 0; 1525 1526 ret = machines__deliver_event(&session->machines, session->evlist, 1527 event, &sample, tool, file_offset); 1528 1529 if (dump_trace && sample.aux_sample.size) 1530 auxtrace__dump_auxtrace_sample(session, &sample); 1531 1532 return ret; 1533 } 1534 1535 static s64 perf_session__process_user_event(struct perf_session *session, 1536 union perf_event *event, 1537 u64 file_offset) 1538 { 1539 struct ordered_events *oe = &session->ordered_events; 1540 struct perf_tool *tool = session->tool; 1541 struct perf_sample sample = { .time = 0, }; 1542 int fd = perf_data__fd(session->data); 1543 int err; 1544 1545 if (event->header.type != PERF_RECORD_COMPRESSED || 1546 tool->compressed == perf_session__process_compressed_event_stub) 1547 dump_event(session->evlist, event, file_offset, &sample); 1548 1549 /* These events are processed right away */ 1550 switch (event->header.type) { 1551 case PERF_RECORD_HEADER_ATTR: 1552 err = tool->attr(tool, event, &session->evlist); 1553 if (err == 0) { 1554 perf_session__set_id_hdr_size(session); 1555 perf_session__set_comm_exec(session); 1556 } 1557 return err; 1558 case PERF_RECORD_EVENT_UPDATE: 1559 return tool->event_update(tool, event, &session->evlist); 1560 case PERF_RECORD_HEADER_EVENT_TYPE: 1561 /* 1562 * Depreceated, but we need to handle it for sake 1563 * of old data files create in pipe mode. 1564 */ 1565 return 0; 1566 case PERF_RECORD_HEADER_TRACING_DATA: 1567 /* 1568 * Setup for reading amidst mmap, but only when we 1569 * are in 'file' mode. The 'pipe' fd is in proper 1570 * place already. 1571 */ 1572 if (!perf_data__is_pipe(session->data)) 1573 lseek(fd, file_offset, SEEK_SET); 1574 return tool->tracing_data(session, event); 1575 case PERF_RECORD_HEADER_BUILD_ID: 1576 return tool->build_id(session, event); 1577 case PERF_RECORD_FINISHED_ROUND: 1578 return tool->finished_round(tool, event, oe); 1579 case PERF_RECORD_ID_INDEX: 1580 return tool->id_index(session, event); 1581 case PERF_RECORD_AUXTRACE_INFO: 1582 return tool->auxtrace_info(session, event); 1583 case PERF_RECORD_AUXTRACE: 1584 /* setup for reading amidst mmap */ 1585 lseek(fd, file_offset + event->header.size, SEEK_SET); 1586 return tool->auxtrace(session, event); 1587 case PERF_RECORD_AUXTRACE_ERROR: 1588 perf_session__auxtrace_error_inc(session, event); 1589 return tool->auxtrace_error(session, event); 1590 case PERF_RECORD_THREAD_MAP: 1591 return tool->thread_map(session, event); 1592 case PERF_RECORD_CPU_MAP: 1593 return tool->cpu_map(session, event); 1594 case PERF_RECORD_STAT_CONFIG: 1595 return tool->stat_config(session, event); 1596 case PERF_RECORD_STAT: 1597 return tool->stat(session, event); 1598 case PERF_RECORD_STAT_ROUND: 1599 return tool->stat_round(session, event); 1600 case PERF_RECORD_TIME_CONV: 1601 session->time_conv = event->time_conv; 1602 return tool->time_conv(session, event); 1603 case PERF_RECORD_HEADER_FEATURE: 1604 return tool->feature(session, event); 1605 case PERF_RECORD_COMPRESSED: 1606 err = tool->compressed(session, event, file_offset); 1607 if (err) 1608 dump_event(session->evlist, event, file_offset, &sample); 1609 return err; 1610 default: 1611 return -EINVAL; 1612 } 1613 } 1614 1615 int perf_session__deliver_synth_event(struct perf_session *session, 1616 union perf_event *event, 1617 struct perf_sample *sample) 1618 { 1619 struct evlist *evlist = session->evlist; 1620 struct perf_tool *tool = session->tool; 1621 1622 events_stats__inc(&evlist->stats, event->header.type); 1623 1624 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1625 return perf_session__process_user_event(session, event, 0); 1626 1627 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0); 1628 } 1629 1630 static void event_swap(union perf_event *event, bool sample_id_all) 1631 { 1632 perf_event__swap_op swap; 1633 1634 swap = perf_event__swap_ops[event->header.type]; 1635 if (swap) 1636 swap(event, sample_id_all); 1637 } 1638 1639 int perf_session__peek_event(struct perf_session *session, off_t file_offset, 1640 void *buf, size_t buf_sz, 1641 union perf_event **event_ptr, 1642 struct perf_sample *sample) 1643 { 1644 union perf_event *event; 1645 size_t hdr_sz, rest; 1646 int fd; 1647 1648 if (session->one_mmap && !session->header.needs_swap) { 1649 event = file_offset - session->one_mmap_offset + 1650 session->one_mmap_addr; 1651 goto out_parse_sample; 1652 } 1653 1654 if (perf_data__is_pipe(session->data)) 1655 return -1; 1656 1657 fd = perf_data__fd(session->data); 1658 hdr_sz = sizeof(struct perf_event_header); 1659 1660 if (buf_sz < hdr_sz) 1661 return -1; 1662 1663 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 || 1664 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz) 1665 return -1; 1666 1667 event = (union perf_event *)buf; 1668 1669 if (session->header.needs_swap) 1670 perf_event_header__bswap(&event->header); 1671 1672 if (event->header.size < hdr_sz || event->header.size > buf_sz) 1673 return -1; 1674 1675 rest = event->header.size - hdr_sz; 1676 1677 if (readn(fd, buf, rest) != (ssize_t)rest) 1678 return -1; 1679 1680 if (session->header.needs_swap) 1681 event_swap(event, evlist__sample_id_all(session->evlist)); 1682 1683 out_parse_sample: 1684 1685 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START && 1686 perf_evlist__parse_sample(session->evlist, event, sample)) 1687 return -1; 1688 1689 *event_ptr = event; 1690 1691 return 0; 1692 } 1693 1694 int perf_session__peek_events(struct perf_session *session, u64 offset, 1695 u64 size, peek_events_cb_t cb, void *data) 1696 { 1697 u64 max_offset = offset + size; 1698 char buf[PERF_SAMPLE_MAX_SIZE]; 1699 union perf_event *event; 1700 int err; 1701 1702 do { 1703 err = perf_session__peek_event(session, offset, buf, 1704 PERF_SAMPLE_MAX_SIZE, &event, 1705 NULL); 1706 if (err) 1707 return err; 1708 1709 err = cb(session, event, offset, data); 1710 if (err) 1711 return err; 1712 1713 offset += event->header.size; 1714 if (event->header.type == PERF_RECORD_AUXTRACE) 1715 offset += event->auxtrace.size; 1716 1717 } while (offset < max_offset); 1718 1719 return err; 1720 } 1721 1722 static s64 perf_session__process_event(struct perf_session *session, 1723 union perf_event *event, u64 file_offset) 1724 { 1725 struct evlist *evlist = session->evlist; 1726 struct perf_tool *tool = session->tool; 1727 int ret; 1728 1729 if (session->header.needs_swap) 1730 event_swap(event, evlist__sample_id_all(evlist)); 1731 1732 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1733 return -EINVAL; 1734 1735 events_stats__inc(&evlist->stats, event->header.type); 1736 1737 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1738 return perf_session__process_user_event(session, event, file_offset); 1739 1740 if (tool->ordered_events) { 1741 u64 timestamp = -1ULL; 1742 1743 ret = perf_evlist__parse_sample_timestamp(evlist, event, ×tamp); 1744 if (ret && ret != -1) 1745 return ret; 1746 1747 ret = perf_session__queue_event(session, event, timestamp, file_offset); 1748 if (ret != -ETIME) 1749 return ret; 1750 } 1751 1752 return perf_session__deliver_event(session, event, tool, file_offset); 1753 } 1754 1755 void perf_event_header__bswap(struct perf_event_header *hdr) 1756 { 1757 hdr->type = bswap_32(hdr->type); 1758 hdr->misc = bswap_16(hdr->misc); 1759 hdr->size = bswap_16(hdr->size); 1760 } 1761 1762 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1763 { 1764 return machine__findnew_thread(&session->machines.host, -1, pid); 1765 } 1766 1767 /* 1768 * Threads are identified by pid and tid, and the idle task has pid == tid == 0. 1769 * So here a single thread is created for that, but actually there is a separate 1770 * idle task per cpu, so there should be one 'struct thread' per cpu, but there 1771 * is only 1. That causes problems for some tools, requiring workarounds. For 1772 * example get_idle_thread() in builtin-sched.c, or thread_stack__per_cpu(). 1773 */ 1774 int perf_session__register_idle_thread(struct perf_session *session) 1775 { 1776 struct thread *thread; 1777 int err = 0; 1778 1779 thread = machine__findnew_thread(&session->machines.host, 0, 0); 1780 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) { 1781 pr_err("problem inserting idle task.\n"); 1782 err = -1; 1783 } 1784 1785 if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) { 1786 pr_err("problem inserting idle task.\n"); 1787 err = -1; 1788 } 1789 1790 /* machine__findnew_thread() got the thread, so put it */ 1791 thread__put(thread); 1792 return err; 1793 } 1794 1795 static void 1796 perf_session__warn_order(const struct perf_session *session) 1797 { 1798 const struct ordered_events *oe = &session->ordered_events; 1799 struct evsel *evsel; 1800 bool should_warn = true; 1801 1802 evlist__for_each_entry(session->evlist, evsel) { 1803 if (evsel->core.attr.write_backward) 1804 should_warn = false; 1805 } 1806 1807 if (!should_warn) 1808 return; 1809 if (oe->nr_unordered_events != 0) 1810 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events); 1811 } 1812 1813 static void perf_session__warn_about_errors(const struct perf_session *session) 1814 { 1815 const struct events_stats *stats = &session->evlist->stats; 1816 1817 if (session->tool->lost == perf_event__process_lost && 1818 stats->nr_events[PERF_RECORD_LOST] != 0) { 1819 ui__warning("Processed %d events and lost %d chunks!\n\n" 1820 "Check IO/CPU overload!\n\n", 1821 stats->nr_events[0], 1822 stats->nr_events[PERF_RECORD_LOST]); 1823 } 1824 1825 if (session->tool->lost_samples == perf_event__process_lost_samples) { 1826 double drop_rate; 1827 1828 drop_rate = (double)stats->total_lost_samples / 1829 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples); 1830 if (drop_rate > 0.05) { 1831 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n", 1832 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples, 1833 drop_rate * 100.0); 1834 } 1835 } 1836 1837 if (session->tool->aux == perf_event__process_aux && 1838 stats->total_aux_lost != 0) { 1839 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n", 1840 stats->total_aux_lost, 1841 stats->nr_events[PERF_RECORD_AUX]); 1842 } 1843 1844 if (session->tool->aux == perf_event__process_aux && 1845 stats->total_aux_partial != 0) { 1846 bool vmm_exclusive = false; 1847 1848 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive", 1849 &vmm_exclusive); 1850 1851 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n" 1852 "Are you running a KVM guest in the background?%s\n\n", 1853 stats->total_aux_partial, 1854 stats->nr_events[PERF_RECORD_AUX], 1855 vmm_exclusive ? 1856 "\nReloading kvm_intel module with vmm_exclusive=0\n" 1857 "will reduce the gaps to only guest's timeslices." : 1858 ""); 1859 } 1860 1861 if (stats->nr_unknown_events != 0) { 1862 ui__warning("Found %u unknown events!\n\n" 1863 "Is this an older tool processing a perf.data " 1864 "file generated by a more recent tool?\n\n" 1865 "If that is not the case, consider " 1866 "reporting to linux-kernel@vger.kernel.org.\n\n", 1867 stats->nr_unknown_events); 1868 } 1869 1870 if (stats->nr_unknown_id != 0) { 1871 ui__warning("%u samples with id not present in the header\n", 1872 stats->nr_unknown_id); 1873 } 1874 1875 if (stats->nr_invalid_chains != 0) { 1876 ui__warning("Found invalid callchains!\n\n" 1877 "%u out of %u events were discarded for this reason.\n\n" 1878 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1879 stats->nr_invalid_chains, 1880 stats->nr_events[PERF_RECORD_SAMPLE]); 1881 } 1882 1883 if (stats->nr_unprocessable_samples != 0) { 1884 ui__warning("%u unprocessable samples recorded.\n" 1885 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1886 stats->nr_unprocessable_samples); 1887 } 1888 1889 perf_session__warn_order(session); 1890 1891 events_stats__auxtrace_error_warn(stats); 1892 1893 if (stats->nr_proc_map_timeout != 0) { 1894 ui__warning("%d map information files for pre-existing threads were\n" 1895 "not processed, if there are samples for addresses they\n" 1896 "will not be resolved, you may find out which are these\n" 1897 "threads by running with -v and redirecting the output\n" 1898 "to a file.\n" 1899 "The time limit to process proc map is too short?\n" 1900 "Increase it by --proc-map-timeout\n", 1901 stats->nr_proc_map_timeout); 1902 } 1903 } 1904 1905 static int perf_session__flush_thread_stack(struct thread *thread, 1906 void *p __maybe_unused) 1907 { 1908 return thread_stack__flush(thread); 1909 } 1910 1911 static int perf_session__flush_thread_stacks(struct perf_session *session) 1912 { 1913 return machines__for_each_thread(&session->machines, 1914 perf_session__flush_thread_stack, 1915 NULL); 1916 } 1917 1918 volatile int session_done; 1919 1920 static int __perf_session__process_decomp_events(struct perf_session *session); 1921 1922 static int __perf_session__process_pipe_events(struct perf_session *session) 1923 { 1924 struct ordered_events *oe = &session->ordered_events; 1925 struct perf_tool *tool = session->tool; 1926 int fd = perf_data__fd(session->data); 1927 union perf_event *event; 1928 uint32_t size, cur_size = 0; 1929 void *buf = NULL; 1930 s64 skip = 0; 1931 u64 head; 1932 ssize_t err; 1933 void *p; 1934 1935 perf_tool__fill_defaults(tool); 1936 1937 head = 0; 1938 cur_size = sizeof(union perf_event); 1939 1940 buf = malloc(cur_size); 1941 if (!buf) 1942 return -errno; 1943 ordered_events__set_copy_on_queue(oe, true); 1944 more: 1945 event = buf; 1946 err = readn(fd, event, sizeof(struct perf_event_header)); 1947 if (err <= 0) { 1948 if (err == 0) 1949 goto done; 1950 1951 pr_err("failed to read event header\n"); 1952 goto out_err; 1953 } 1954 1955 if (session->header.needs_swap) 1956 perf_event_header__bswap(&event->header); 1957 1958 size = event->header.size; 1959 if (size < sizeof(struct perf_event_header)) { 1960 pr_err("bad event header size\n"); 1961 goto out_err; 1962 } 1963 1964 if (size > cur_size) { 1965 void *new = realloc(buf, size); 1966 if (!new) { 1967 pr_err("failed to allocate memory to read event\n"); 1968 goto out_err; 1969 } 1970 buf = new; 1971 cur_size = size; 1972 event = buf; 1973 } 1974 p = event; 1975 p += sizeof(struct perf_event_header); 1976 1977 if (size - sizeof(struct perf_event_header)) { 1978 err = readn(fd, p, size - sizeof(struct perf_event_header)); 1979 if (err <= 0) { 1980 if (err == 0) { 1981 pr_err("unexpected end of event stream\n"); 1982 goto done; 1983 } 1984 1985 pr_err("failed to read event data\n"); 1986 goto out_err; 1987 } 1988 } 1989 1990 if ((skip = perf_session__process_event(session, event, head)) < 0) { 1991 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1992 head, event->header.size, event->header.type); 1993 err = -EINVAL; 1994 goto out_err; 1995 } 1996 1997 head += size; 1998 1999 if (skip > 0) 2000 head += skip; 2001 2002 err = __perf_session__process_decomp_events(session); 2003 if (err) 2004 goto out_err; 2005 2006 if (!session_done()) 2007 goto more; 2008 done: 2009 /* do the final flush for ordered samples */ 2010 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 2011 if (err) 2012 goto out_err; 2013 err = auxtrace__flush_events(session, tool); 2014 if (err) 2015 goto out_err; 2016 err = perf_session__flush_thread_stacks(session); 2017 out_err: 2018 free(buf); 2019 if (!tool->no_warn) 2020 perf_session__warn_about_errors(session); 2021 ordered_events__free(&session->ordered_events); 2022 auxtrace__free_events(session); 2023 return err; 2024 } 2025 2026 static union perf_event * 2027 prefetch_event(char *buf, u64 head, size_t mmap_size, 2028 bool needs_swap, union perf_event *error) 2029 { 2030 union perf_event *event; 2031 2032 /* 2033 * Ensure we have enough space remaining to read 2034 * the size of the event in the headers. 2035 */ 2036 if (head + sizeof(event->header) > mmap_size) 2037 return NULL; 2038 2039 event = (union perf_event *)(buf + head); 2040 if (needs_swap) 2041 perf_event_header__bswap(&event->header); 2042 2043 if (head + event->header.size <= mmap_size) 2044 return event; 2045 2046 /* We're not fetching the event so swap back again */ 2047 if (needs_swap) 2048 perf_event_header__bswap(&event->header); 2049 2050 pr_debug("%s: head=%#" PRIx64 " event->header_size=%#x, mmap_size=%#zx:" 2051 " fuzzed or compressed perf.data?\n",__func__, head, event->header.size, mmap_size); 2052 2053 return error; 2054 } 2055 2056 static union perf_event * 2057 fetch_mmaped_event(u64 head, size_t mmap_size, char *buf, bool needs_swap) 2058 { 2059 return prefetch_event(buf, head, mmap_size, needs_swap, ERR_PTR(-EINVAL)); 2060 } 2061 2062 static union perf_event * 2063 fetch_decomp_event(u64 head, size_t mmap_size, char *buf, bool needs_swap) 2064 { 2065 return prefetch_event(buf, head, mmap_size, needs_swap, NULL); 2066 } 2067 2068 static int __perf_session__process_decomp_events(struct perf_session *session) 2069 { 2070 s64 skip; 2071 u64 size, file_pos = 0; 2072 struct decomp *decomp = session->decomp_last; 2073 2074 if (!decomp) 2075 return 0; 2076 2077 while (decomp->head < decomp->size && !session_done()) { 2078 union perf_event *event = fetch_decomp_event(decomp->head, decomp->size, decomp->data, 2079 session->header.needs_swap); 2080 2081 if (!event) 2082 break; 2083 2084 size = event->header.size; 2085 2086 if (size < sizeof(struct perf_event_header) || 2087 (skip = perf_session__process_event(session, event, file_pos)) < 0) { 2088 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 2089 decomp->file_pos + decomp->head, event->header.size, event->header.type); 2090 return -EINVAL; 2091 } 2092 2093 if (skip) 2094 size += skip; 2095 2096 decomp->head += size; 2097 } 2098 2099 return 0; 2100 } 2101 2102 /* 2103 * On 64bit we can mmap the data file in one go. No need for tiny mmap 2104 * slices. On 32bit we use 32MB. 2105 */ 2106 #if BITS_PER_LONG == 64 2107 #define MMAP_SIZE ULLONG_MAX 2108 #define NUM_MMAPS 1 2109 #else 2110 #define MMAP_SIZE (32 * 1024 * 1024ULL) 2111 #define NUM_MMAPS 128 2112 #endif 2113 2114 struct reader; 2115 2116 typedef s64 (*reader_cb_t)(struct perf_session *session, 2117 union perf_event *event, 2118 u64 file_offset); 2119 2120 struct reader { 2121 int fd; 2122 u64 data_size; 2123 u64 data_offset; 2124 reader_cb_t process; 2125 }; 2126 2127 static int 2128 reader__process_events(struct reader *rd, struct perf_session *session, 2129 struct ui_progress *prog) 2130 { 2131 u64 data_size = rd->data_size; 2132 u64 head, page_offset, file_offset, file_pos, size; 2133 int err = 0, mmap_prot, mmap_flags, map_idx = 0; 2134 size_t mmap_size; 2135 char *buf, *mmaps[NUM_MMAPS]; 2136 union perf_event *event; 2137 s64 skip; 2138 2139 page_offset = page_size * (rd->data_offset / page_size); 2140 file_offset = page_offset; 2141 head = rd->data_offset - page_offset; 2142 2143 ui_progress__init_size(prog, data_size, "Processing events..."); 2144 2145 data_size += rd->data_offset; 2146 2147 mmap_size = MMAP_SIZE; 2148 if (mmap_size > data_size) { 2149 mmap_size = data_size; 2150 session->one_mmap = true; 2151 } 2152 2153 memset(mmaps, 0, sizeof(mmaps)); 2154 2155 mmap_prot = PROT_READ; 2156 mmap_flags = MAP_SHARED; 2157 2158 if (session->header.needs_swap) { 2159 mmap_prot |= PROT_WRITE; 2160 mmap_flags = MAP_PRIVATE; 2161 } 2162 remap: 2163 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, rd->fd, 2164 file_offset); 2165 if (buf == MAP_FAILED) { 2166 pr_err("failed to mmap file\n"); 2167 err = -errno; 2168 goto out; 2169 } 2170 mmaps[map_idx] = buf; 2171 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 2172 file_pos = file_offset + head; 2173 if (session->one_mmap) { 2174 session->one_mmap_addr = buf; 2175 session->one_mmap_offset = file_offset; 2176 } 2177 2178 more: 2179 event = fetch_mmaped_event(head, mmap_size, buf, session->header.needs_swap); 2180 if (IS_ERR(event)) 2181 return PTR_ERR(event); 2182 2183 if (!event) { 2184 if (mmaps[map_idx]) { 2185 munmap(mmaps[map_idx], mmap_size); 2186 mmaps[map_idx] = NULL; 2187 } 2188 2189 page_offset = page_size * (head / page_size); 2190 file_offset += page_offset; 2191 head -= page_offset; 2192 goto remap; 2193 } 2194 2195 size = event->header.size; 2196 2197 skip = -EINVAL; 2198 2199 if (size < sizeof(struct perf_event_header) || 2200 (skip = rd->process(session, event, file_pos)) < 0) { 2201 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n", 2202 file_offset + head, event->header.size, 2203 event->header.type, strerror(-skip)); 2204 err = skip; 2205 goto out; 2206 } 2207 2208 if (skip) 2209 size += skip; 2210 2211 head += size; 2212 file_pos += size; 2213 2214 err = __perf_session__process_decomp_events(session); 2215 if (err) 2216 goto out; 2217 2218 ui_progress__update(prog, size); 2219 2220 if (session_done()) 2221 goto out; 2222 2223 if (file_pos < data_size) 2224 goto more; 2225 2226 out: 2227 return err; 2228 } 2229 2230 static s64 process_simple(struct perf_session *session, 2231 union perf_event *event, 2232 u64 file_offset) 2233 { 2234 return perf_session__process_event(session, event, file_offset); 2235 } 2236 2237 static int __perf_session__process_events(struct perf_session *session) 2238 { 2239 struct reader rd = { 2240 .fd = perf_data__fd(session->data), 2241 .data_size = session->header.data_size, 2242 .data_offset = session->header.data_offset, 2243 .process = process_simple, 2244 }; 2245 struct ordered_events *oe = &session->ordered_events; 2246 struct perf_tool *tool = session->tool; 2247 struct ui_progress prog; 2248 int err; 2249 2250 perf_tool__fill_defaults(tool); 2251 2252 if (rd.data_size == 0) 2253 return -1; 2254 2255 ui_progress__init_size(&prog, rd.data_size, "Processing events..."); 2256 2257 err = reader__process_events(&rd, session, &prog); 2258 if (err) 2259 goto out_err; 2260 /* do the final flush for ordered samples */ 2261 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 2262 if (err) 2263 goto out_err; 2264 err = auxtrace__flush_events(session, tool); 2265 if (err) 2266 goto out_err; 2267 err = perf_session__flush_thread_stacks(session); 2268 out_err: 2269 ui_progress__finish(); 2270 if (!tool->no_warn) 2271 perf_session__warn_about_errors(session); 2272 /* 2273 * We may switching perf.data output, make ordered_events 2274 * reusable. 2275 */ 2276 ordered_events__reinit(&session->ordered_events); 2277 auxtrace__free_events(session); 2278 session->one_mmap = false; 2279 return err; 2280 } 2281 2282 int perf_session__process_events(struct perf_session *session) 2283 { 2284 if (perf_session__register_idle_thread(session) < 0) 2285 return -ENOMEM; 2286 2287 if (perf_data__is_pipe(session->data)) 2288 return __perf_session__process_pipe_events(session); 2289 2290 return __perf_session__process_events(session); 2291 } 2292 2293 bool perf_session__has_traces(struct perf_session *session, const char *msg) 2294 { 2295 struct evsel *evsel; 2296 2297 evlist__for_each_entry(session->evlist, evsel) { 2298 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) 2299 return true; 2300 } 2301 2302 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 2303 return false; 2304 } 2305 2306 int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr) 2307 { 2308 char *bracket; 2309 struct ref_reloc_sym *ref; 2310 struct kmap *kmap; 2311 2312 ref = zalloc(sizeof(struct ref_reloc_sym)); 2313 if (ref == NULL) 2314 return -ENOMEM; 2315 2316 ref->name = strdup(symbol_name); 2317 if (ref->name == NULL) { 2318 free(ref); 2319 return -ENOMEM; 2320 } 2321 2322 bracket = strchr(ref->name, ']'); 2323 if (bracket) 2324 *bracket = '\0'; 2325 2326 ref->addr = addr; 2327 2328 kmap = map__kmap(map); 2329 if (kmap) 2330 kmap->ref_reloc_sym = ref; 2331 2332 return 0; 2333 } 2334 2335 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp) 2336 { 2337 return machines__fprintf_dsos(&session->machines, fp); 2338 } 2339 2340 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp, 2341 bool (skip)(struct dso *dso, int parm), int parm) 2342 { 2343 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm); 2344 } 2345 2346 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 2347 { 2348 size_t ret; 2349 const char *msg = ""; 2350 2351 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE)) 2352 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)"; 2353 2354 ret = fprintf(fp, "\nAggregated stats:%s\n", msg); 2355 2356 ret += events_stats__fprintf(&session->evlist->stats, fp); 2357 return ret; 2358 } 2359 2360 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 2361 { 2362 /* 2363 * FIXME: Here we have to actually print all the machines in this 2364 * session, not just the host... 2365 */ 2366 return machine__fprintf(&session->machines.host, fp); 2367 } 2368 2369 struct evsel *perf_session__find_first_evtype(struct perf_session *session, 2370 unsigned int type) 2371 { 2372 struct evsel *pos; 2373 2374 evlist__for_each_entry(session->evlist, pos) { 2375 if (pos->core.attr.type == type) 2376 return pos; 2377 } 2378 return NULL; 2379 } 2380 2381 int perf_session__cpu_bitmap(struct perf_session *session, 2382 const char *cpu_list, unsigned long *cpu_bitmap) 2383 { 2384 int i, err = -1; 2385 struct perf_cpu_map *map; 2386 int nr_cpus = min(session->header.env.nr_cpus_online, MAX_NR_CPUS); 2387 2388 for (i = 0; i < PERF_TYPE_MAX; ++i) { 2389 struct evsel *evsel; 2390 2391 evsel = perf_session__find_first_evtype(session, i); 2392 if (!evsel) 2393 continue; 2394 2395 if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CPU)) { 2396 pr_err("File does not contain CPU events. " 2397 "Remove -C option to proceed.\n"); 2398 return -1; 2399 } 2400 } 2401 2402 map = perf_cpu_map__new(cpu_list); 2403 if (map == NULL) { 2404 pr_err("Invalid cpu_list\n"); 2405 return -1; 2406 } 2407 2408 for (i = 0; i < map->nr; i++) { 2409 int cpu = map->map[i]; 2410 2411 if (cpu >= nr_cpus) { 2412 pr_err("Requested CPU %d too large. " 2413 "Consider raising MAX_NR_CPUS\n", cpu); 2414 goto out_delete_map; 2415 } 2416 2417 set_bit(cpu, cpu_bitmap); 2418 } 2419 2420 err = 0; 2421 2422 out_delete_map: 2423 perf_cpu_map__put(map); 2424 return err; 2425 } 2426 2427 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 2428 bool full) 2429 { 2430 if (session == NULL || fp == NULL) 2431 return; 2432 2433 fprintf(fp, "# ========\n"); 2434 perf_header__fprintf_info(session, fp, full); 2435 fprintf(fp, "# ========\n#\n"); 2436 } 2437 2438 int perf_event__process_id_index(struct perf_session *session, 2439 union perf_event *event) 2440 { 2441 struct evlist *evlist = session->evlist; 2442 struct perf_record_id_index *ie = &event->id_index; 2443 size_t i, nr, max_nr; 2444 2445 max_nr = (ie->header.size - sizeof(struct perf_record_id_index)) / 2446 sizeof(struct id_index_entry); 2447 nr = ie->nr; 2448 if (nr > max_nr) 2449 return -EINVAL; 2450 2451 if (dump_trace) 2452 fprintf(stdout, " nr: %zu\n", nr); 2453 2454 for (i = 0; i < nr; i++) { 2455 struct id_index_entry *e = &ie->entries[i]; 2456 struct perf_sample_id *sid; 2457 2458 if (dump_trace) { 2459 fprintf(stdout, " ... id: %"PRI_lu64, e->id); 2460 fprintf(stdout, " idx: %"PRI_lu64, e->idx); 2461 fprintf(stdout, " cpu: %"PRI_ld64, e->cpu); 2462 fprintf(stdout, " tid: %"PRI_ld64"\n", e->tid); 2463 } 2464 2465 sid = perf_evlist__id2sid(evlist, e->id); 2466 if (!sid) 2467 return -ENOENT; 2468 sid->idx = e->idx; 2469 sid->cpu = e->cpu; 2470 sid->tid = e->tid; 2471 } 2472 return 0; 2473 } 2474