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