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