1// SPDX-License-Identifier: GPL-2.0 2#include <errno.h> 3#include <inttypes.h> 4#include <linux/err.h> 5#include <linux/kernel.h> 6#include <linux/zalloc.h> 7#include <api/fs/fs.h> 8 9#include <byteswap.h> 10#include <unistd.h> 11#include <sys/types.h> 12#include <sys/mman.h> 13#include <perf/cpumap.h> 14 15#include "map_symbol.h" 16#include "branch.h" 17#include "debug.h" 18#include "evlist.h" 19#include "evsel.h" 20#include "memswap.h" 21#include "map.h" 22#include "symbol.h" 23#include "session.h" 24#include "tool.h" 25#include "perf_regs.h" 26#include "asm/bug.h" 27#include "auxtrace.h" 28#include "thread.h" 29#include "thread-stack.h" 30#include "sample-raw.h" 31#include "stat.h" 32#include "ui/progress.h" 33#include "../perf.h" 34#include "arch/common.h" 35#include <internal/lib.h> 36 37#ifdef HAVE_ZSTD_SUPPORT 38static int perf_session__process_compressed_event(struct perf_session *session, 39 union perf_event *event, u64 file_offset) 40{ 41 void *src; 42 size_t decomp_size, src_size; 43 u64 decomp_last_rem = 0; 44 size_t mmap_len, decomp_len = session->header.env.comp_mmap_len; 45 struct decomp *decomp, *decomp_last = session->decomp_last; 46 47 if (decomp_last) { 48 decomp_last_rem = decomp_last->size - decomp_last->head; 49 decomp_len += decomp_last_rem; 50 } 51 52 mmap_len = sizeof(struct decomp) + decomp_len; 53 decomp = mmap(NULL, mmap_len, PROT_READ|PROT_WRITE, 54 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); 55 if (decomp == MAP_FAILED) { 56 pr_err("Couldn't allocate memory for decompression\n"); 57 return -1; 58 } 59 60 decomp->file_pos = file_offset; 61 decomp->mmap_len = mmap_len; 62 decomp->head = 0; 63 64 if (decomp_last_rem) { 65 memcpy(decomp->data, &(decomp_last->data[decomp_last->head]), decomp_last_rem); 66 decomp->size = decomp_last_rem; 67 } 68 69 src = (void *)event + sizeof(struct perf_record_compressed); 70 src_size = event->pack.header.size - sizeof(struct perf_record_compressed); 71 72 decomp_size = zstd_decompress_stream(&(session->zstd_data), src, src_size, 73 &(decomp->data[decomp_last_rem]), decomp_len - decomp_last_rem); 74 if (!decomp_size) { 75 munmap(decomp, mmap_len); 76 pr_err("Couldn't decompress data\n"); 77 return -1; 78 } 79 80 decomp->size += decomp_size; 81 82 if (session->decomp == NULL) { 83 session->decomp = decomp; 84 session->decomp_last = decomp; 85 } else { 86 session->decomp_last->next = decomp; 87 session->decomp_last = decomp; 88 } 89 90 pr_debug("decomp (B): %zd to %zd\n", src_size, decomp_size); 91 92 return 0; 93} 94#else /* !HAVE_ZSTD_SUPPORT */ 95#define perf_session__process_compressed_event perf_session__process_compressed_event_stub 96#endif 97 98static int perf_session__deliver_event(struct perf_session *session, 99 union perf_event *event, 100 struct perf_tool *tool, 101 u64 file_offset); 102 103static int perf_session__open(struct perf_session *session) 104{ 105 struct perf_data *data = session->data; 106 107 if (perf_session__read_header(session) < 0) { 108 pr_err("incompatible file format (rerun with -v to learn more)\n"); 109 return -1; 110 } 111 112 if (perf_data__is_pipe(data)) 113 return 0; 114 115 if (perf_header__has_feat(&session->header, HEADER_STAT)) 116 return 0; 117 118 if (!evlist__valid_sample_type(session->evlist)) { 119 pr_err("non matching sample_type\n"); 120 return -1; 121 } 122 123 if (!evlist__valid_sample_id_all(session->evlist)) { 124 pr_err("non matching sample_id_all\n"); 125 return -1; 126 } 127 128 if (!perf_evlist__valid_read_format(session->evlist)) { 129 pr_err("non matching read_format\n"); 130 return -1; 131 } 132 133 return 0; 134} 135 136void perf_session__set_id_hdr_size(struct perf_session *session) 137{ 138 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist); 139 140 machines__set_id_hdr_size(&session->machines, id_hdr_size); 141} 142 143int perf_session__create_kernel_maps(struct perf_session *session) 144{ 145 int ret = machine__create_kernel_maps(&session->machines.host); 146 147 if (ret >= 0) 148 ret = machines__create_guest_kernel_maps(&session->machines); 149 return ret; 150} 151 152static void perf_session__destroy_kernel_maps(struct perf_session *session) 153{ 154 machines__destroy_kernel_maps(&session->machines); 155} 156 157static bool perf_session__has_comm_exec(struct perf_session *session) 158{ 159 struct evsel *evsel; 160 161 evlist__for_each_entry(session->evlist, evsel) { 162 if (evsel->core.attr.comm_exec) 163 return true; 164 } 165 166 return false; 167} 168 169static void perf_session__set_comm_exec(struct perf_session *session) 170{ 171 bool comm_exec = perf_session__has_comm_exec(session); 172 173 machines__set_comm_exec(&session->machines, comm_exec); 174} 175 176static int ordered_events__deliver_event(struct ordered_events *oe, 177 struct ordered_event *event) 178{ 179 struct perf_session *session = container_of(oe, struct perf_session, 180 ordered_events); 181 182 return perf_session__deliver_event(session, event->event, 183 session->tool, event->file_offset); 184} 185 186struct perf_session *perf_session__new(struct perf_data *data, 187 bool repipe, struct perf_tool *tool) 188{ 189 int ret = -ENOMEM; 190 struct perf_session *session = zalloc(sizeof(*session)); 191 192 if (!session) 193 goto out; 194 195 session->repipe = repipe; 196 session->tool = tool; 197 INIT_LIST_HEAD(&session->auxtrace_index); 198 machines__init(&session->machines); 199 ordered_events__init(&session->ordered_events, 200 ordered_events__deliver_event, NULL); 201 202 perf_env__init(&session->header.env); 203 if (data) { 204 ret = perf_data__open(data); 205 if (ret < 0) 206 goto out_delete; 207 208 session->data = data; 209 210 if (perf_data__is_read(data)) { 211 ret = perf_session__open(session); 212 if (ret < 0) 213 goto out_delete; 214 215 /* 216 * set session attributes that are present in perf.data 217 * but not in pipe-mode. 218 */ 219 if (!data->is_pipe) { 220 perf_session__set_id_hdr_size(session); 221 perf_session__set_comm_exec(session); 222 } 223 224 perf_evlist__init_trace_event_sample_raw(session->evlist); 225 226 /* Open the directory data. */ 227 if (data->is_dir) { 228 ret = perf_data__open_dir(data); 229 if (ret) 230 goto out_delete; 231 } 232 233 if (!symbol_conf.kallsyms_name && 234 !symbol_conf.vmlinux_name) 235 symbol_conf.kallsyms_name = perf_data__kallsyms_name(data); 236 } 237 } else { 238 session->machines.host.env = &perf_env; 239 } 240 241 session->machines.host.single_address_space = 242 perf_env__single_address_space(session->machines.host.env); 243 244 if (!data || perf_data__is_write(data)) { 245 /* 246 * In O_RDONLY mode this will be performed when reading the 247 * kernel MMAP event, in perf_event__process_mmap(). 248 */ 249 if (perf_session__create_kernel_maps(session) < 0) 250 pr_warning("Cannot read kernel map\n"); 251 } 252 253 /* 254 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is 255 * processed, so evlist__sample_id_all is not meaningful here. 256 */ 257 if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps && 258 tool->ordered_events && !evlist__sample_id_all(session->evlist)) { 259 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); 260 tool->ordered_events = false; 261 } 262 263 return session; 264 265 out_delete: 266 perf_session__delete(session); 267 out: 268 return ERR_PTR(ret); 269} 270 271static void perf_session__delete_threads(struct perf_session *session) 272{ 273 machine__delete_threads(&session->machines.host); 274} 275 276static void perf_session__release_decomp_events(struct perf_session *session) 277{ 278 struct decomp *next, *decomp; 279 size_t mmap_len; 280 next = session->decomp; 281 do { 282 decomp = next; 283 if (decomp == NULL) 284 break; 285 next = decomp->next; 286 mmap_len = decomp->mmap_len; 287 munmap(decomp, mmap_len); 288 } while (1); 289} 290 291void perf_session__delete(struct perf_session *session) 292{ 293 if (session == NULL) 294 return; 295 auxtrace__free(session); 296 auxtrace_index__free(&session->auxtrace_index); 297 perf_session__destroy_kernel_maps(session); 298 perf_session__delete_threads(session); 299 perf_session__release_decomp_events(session); 300 perf_env__exit(&session->header.env); 301 machines__exit(&session->machines); 302 if (session->data) 303 perf_data__close(session->data); 304 free(session); 305} 306 307static int process_event_synth_tracing_data_stub(struct perf_session *session 308 __maybe_unused, 309 union perf_event *event 310 __maybe_unused) 311{ 312 dump_printf(": unhandled!\n"); 313 return 0; 314} 315 316static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused, 317 union perf_event *event __maybe_unused, 318 struct evlist **pevlist 319 __maybe_unused) 320{ 321 dump_printf(": unhandled!\n"); 322 return 0; 323} 324 325static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused, 326 union perf_event *event __maybe_unused, 327 struct evlist **pevlist 328 __maybe_unused) 329{ 330 if (dump_trace) 331 perf_event__fprintf_event_update(event, stdout); 332 333 dump_printf(": unhandled!\n"); 334 return 0; 335} 336 337static int process_event_sample_stub(struct perf_tool *tool __maybe_unused, 338 union perf_event *event __maybe_unused, 339 struct perf_sample *sample __maybe_unused, 340 struct evsel *evsel __maybe_unused, 341 struct machine *machine __maybe_unused) 342{ 343 dump_printf(": unhandled!\n"); 344 return 0; 345} 346 347static int process_event_stub(struct perf_tool *tool __maybe_unused, 348 union perf_event *event __maybe_unused, 349 struct perf_sample *sample __maybe_unused, 350 struct machine *machine __maybe_unused) 351{ 352 dump_printf(": unhandled!\n"); 353 return 0; 354} 355 356static int process_finished_round_stub(struct perf_tool *tool __maybe_unused, 357 union perf_event *event __maybe_unused, 358 struct ordered_events *oe __maybe_unused) 359{ 360 dump_printf(": unhandled!\n"); 361 return 0; 362} 363 364static int process_finished_round(struct perf_tool *tool, 365 union perf_event *event, 366 struct ordered_events *oe); 367 368static int skipn(int fd, off_t n) 369{ 370 char buf[4096]; 371 ssize_t ret; 372 373 while (n > 0) { 374 ret = read(fd, buf, min(n, (off_t)sizeof(buf))); 375 if (ret <= 0) 376 return ret; 377 n -= ret; 378 } 379 380 return 0; 381} 382 383static s64 process_event_auxtrace_stub(struct perf_session *session __maybe_unused, 384 union perf_event *event) 385{ 386 dump_printf(": unhandled!\n"); 387 if (perf_data__is_pipe(session->data)) 388 skipn(perf_data__fd(session->data), event->auxtrace.size); 389 return event->auxtrace.size; 390} 391 392static int process_event_op2_stub(struct perf_session *session __maybe_unused, 393 union perf_event *event __maybe_unused) 394{ 395 dump_printf(": unhandled!\n"); 396 return 0; 397} 398 399 400static 401int process_event_thread_map_stub(struct perf_session *session __maybe_unused, 402 union perf_event *event __maybe_unused) 403{ 404 if (dump_trace) 405 perf_event__fprintf_thread_map(event, stdout); 406 407 dump_printf(": unhandled!\n"); 408 return 0; 409} 410 411static 412int process_event_cpu_map_stub(struct perf_session *session __maybe_unused, 413 union perf_event *event __maybe_unused) 414{ 415 if (dump_trace) 416 perf_event__fprintf_cpu_map(event, stdout); 417 418 dump_printf(": unhandled!\n"); 419 return 0; 420} 421 422static 423int process_event_stat_config_stub(struct perf_session *session __maybe_unused, 424 union perf_event *event __maybe_unused) 425{ 426 if (dump_trace) 427 perf_event__fprintf_stat_config(event, stdout); 428 429 dump_printf(": unhandled!\n"); 430 return 0; 431} 432 433static int process_stat_stub(struct perf_session *perf_session __maybe_unused, 434 union perf_event *event) 435{ 436 if (dump_trace) 437 perf_event__fprintf_stat(event, stdout); 438 439 dump_printf(": unhandled!\n"); 440 return 0; 441} 442 443static int process_stat_round_stub(struct perf_session *perf_session __maybe_unused, 444 union perf_event *event) 445{ 446 if (dump_trace) 447 perf_event__fprintf_stat_round(event, stdout); 448 449 dump_printf(": unhandled!\n"); 450 return 0; 451} 452 453static int perf_session__process_compressed_event_stub(struct perf_session *session __maybe_unused, 454 union perf_event *event __maybe_unused, 455 u64 file_offset __maybe_unused) 456{ 457 dump_printf(": unhandled!\n"); 458 return 0; 459} 460 461void perf_tool__fill_defaults(struct perf_tool *tool) 462{ 463 if (tool->sample == NULL) 464 tool->sample = process_event_sample_stub; 465 if (tool->mmap == NULL) 466 tool->mmap = process_event_stub; 467 if (tool->mmap2 == NULL) 468 tool->mmap2 = process_event_stub; 469 if (tool->comm == NULL) 470 tool->comm = process_event_stub; 471 if (tool->namespaces == NULL) 472 tool->namespaces = process_event_stub; 473 if (tool->cgroup == NULL) 474 tool->cgroup = process_event_stub; 475 if (tool->fork == NULL) 476 tool->fork = process_event_stub; 477 if (tool->exit == NULL) 478 tool->exit = process_event_stub; 479 if (tool->lost == NULL) 480 tool->lost = perf_event__process_lost; 481 if (tool->lost_samples == NULL) 482 tool->lost_samples = perf_event__process_lost_samples; 483 if (tool->aux == NULL) 484 tool->aux = perf_event__process_aux; 485 if (tool->itrace_start == NULL) 486 tool->itrace_start = perf_event__process_itrace_start; 487 if (tool->context_switch == NULL) 488 tool->context_switch = perf_event__process_switch; 489 if (tool->ksymbol == NULL) 490 tool->ksymbol = perf_event__process_ksymbol; 491 if (tool->bpf == NULL) 492 tool->bpf = perf_event__process_bpf; 493 if (tool->text_poke == NULL) 494 tool->text_poke = perf_event__process_text_poke; 495 if (tool->read == NULL) 496 tool->read = process_event_sample_stub; 497 if (tool->throttle == NULL) 498 tool->throttle = process_event_stub; 499 if (tool->unthrottle == NULL) 500 tool->unthrottle = process_event_stub; 501 if (tool->attr == NULL) 502 tool->attr = process_event_synth_attr_stub; 503 if (tool->event_update == NULL) 504 tool->event_update = process_event_synth_event_update_stub; 505 if (tool->tracing_data == NULL) 506 tool->tracing_data = process_event_synth_tracing_data_stub; 507 if (tool->build_id == NULL) 508 tool->build_id = process_event_op2_stub; 509 if (tool->finished_round == NULL) { 510 if (tool->ordered_events) 511 tool->finished_round = process_finished_round; 512 else 513 tool->finished_round = process_finished_round_stub; 514 } 515 if (tool->id_index == NULL) 516 tool->id_index = process_event_op2_stub; 517 if (tool->auxtrace_info == NULL) 518 tool->auxtrace_info = process_event_op2_stub; 519 if (tool->auxtrace == NULL) 520 tool->auxtrace = process_event_auxtrace_stub; 521 if (tool->auxtrace_error == NULL) 522 tool->auxtrace_error = process_event_op2_stub; 523 if (tool->thread_map == NULL) 524 tool->thread_map = process_event_thread_map_stub; 525 if (tool->cpu_map == NULL) 526 tool->cpu_map = process_event_cpu_map_stub; 527 if (tool->stat_config == NULL) 528 tool->stat_config = process_event_stat_config_stub; 529 if (tool->stat == NULL) 530 tool->stat = process_stat_stub; 531 if (tool->stat_round == NULL) 532 tool->stat_round = process_stat_round_stub; 533 if (tool->time_conv == NULL) 534 tool->time_conv = process_event_op2_stub; 535 if (tool->feature == NULL) 536 tool->feature = process_event_op2_stub; 537 if (tool->compressed == NULL) 538 tool->compressed = perf_session__process_compressed_event; 539} 540 541static void swap_sample_id_all(union perf_event *event, void *data) 542{ 543 void *end = (void *) event + event->header.size; 544 int size = end - data; 545 546 BUG_ON(size % sizeof(u64)); 547 mem_bswap_64(data, size); 548} 549 550static void perf_event__all64_swap(union perf_event *event, 551 bool sample_id_all __maybe_unused) 552{ 553 struct perf_event_header *hdr = &event->header; 554 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 555} 556 557static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 558{ 559 event->comm.pid = bswap_32(event->comm.pid); 560 event->comm.tid = bswap_32(event->comm.tid); 561 562 if (sample_id_all) { 563 void *data = &event->comm.comm; 564 565 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 566 swap_sample_id_all(event, data); 567 } 568} 569 570static void perf_event__mmap_swap(union perf_event *event, 571 bool sample_id_all) 572{ 573 event->mmap.pid = bswap_32(event->mmap.pid); 574 event->mmap.tid = bswap_32(event->mmap.tid); 575 event->mmap.start = bswap_64(event->mmap.start); 576 event->mmap.len = bswap_64(event->mmap.len); 577 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 578 579 if (sample_id_all) { 580 void *data = &event->mmap.filename; 581 582 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 583 swap_sample_id_all(event, data); 584 } 585} 586 587static void perf_event__mmap2_swap(union perf_event *event, 588 bool sample_id_all) 589{ 590 event->mmap2.pid = bswap_32(event->mmap2.pid); 591 event->mmap2.tid = bswap_32(event->mmap2.tid); 592 event->mmap2.start = bswap_64(event->mmap2.start); 593 event->mmap2.len = bswap_64(event->mmap2.len); 594 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); 595 event->mmap2.maj = bswap_32(event->mmap2.maj); 596 event->mmap2.min = bswap_32(event->mmap2.min); 597 event->mmap2.ino = bswap_64(event->mmap2.ino); 598 event->mmap2.ino_generation = bswap_64(event->mmap2.ino_generation); 599 600 if (sample_id_all) { 601 void *data = &event->mmap2.filename; 602 603 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 604 swap_sample_id_all(event, data); 605 } 606} 607static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 608{ 609 event->fork.pid = bswap_32(event->fork.pid); 610 event->fork.tid = bswap_32(event->fork.tid); 611 event->fork.ppid = bswap_32(event->fork.ppid); 612 event->fork.ptid = bswap_32(event->fork.ptid); 613 event->fork.time = bswap_64(event->fork.time); 614 615 if (sample_id_all) 616 swap_sample_id_all(event, &event->fork + 1); 617} 618 619static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 620{ 621 event->read.pid = bswap_32(event->read.pid); 622 event->read.tid = bswap_32(event->read.tid); 623 event->read.value = bswap_64(event->read.value); 624 event->read.time_enabled = bswap_64(event->read.time_enabled); 625 event->read.time_running = bswap_64(event->read.time_running); 626 event->read.id = bswap_64(event->read.id); 627 628 if (sample_id_all) 629 swap_sample_id_all(event, &event->read + 1); 630} 631 632static void perf_event__aux_swap(union perf_event *event, bool sample_id_all) 633{ 634 event->aux.aux_offset = bswap_64(event->aux.aux_offset); 635 event->aux.aux_size = bswap_64(event->aux.aux_size); 636 event->aux.flags = bswap_64(event->aux.flags); 637 638 if (sample_id_all) 639 swap_sample_id_all(event, &event->aux + 1); 640} 641 642static void perf_event__itrace_start_swap(union perf_event *event, 643 bool sample_id_all) 644{ 645 event->itrace_start.pid = bswap_32(event->itrace_start.pid); 646 event->itrace_start.tid = bswap_32(event->itrace_start.tid); 647 648 if (sample_id_all) 649 swap_sample_id_all(event, &event->itrace_start + 1); 650} 651 652static void perf_event__switch_swap(union perf_event *event, bool sample_id_all) 653{ 654 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) { 655 event->context_switch.next_prev_pid = 656 bswap_32(event->context_switch.next_prev_pid); 657 event->context_switch.next_prev_tid = 658 bswap_32(event->context_switch.next_prev_tid); 659 } 660 661 if (sample_id_all) 662 swap_sample_id_all(event, &event->context_switch + 1); 663} 664 665static void perf_event__text_poke_swap(union perf_event *event, bool sample_id_all) 666{ 667 event->text_poke.addr = bswap_64(event->text_poke.addr); 668 event->text_poke.old_len = bswap_16(event->text_poke.old_len); 669 event->text_poke.new_len = bswap_16(event->text_poke.new_len); 670 671 if (sample_id_all) { 672 size_t len = sizeof(event->text_poke.old_len) + 673 sizeof(event->text_poke.new_len) + 674 event->text_poke.old_len + 675 event->text_poke.new_len; 676 void *data = &event->text_poke.old_len; 677 678 data += PERF_ALIGN(len, sizeof(u64)); 679 swap_sample_id_all(event, data); 680 } 681} 682 683static void perf_event__throttle_swap(union perf_event *event, 684 bool sample_id_all) 685{ 686 event->throttle.time = bswap_64(event->throttle.time); 687 event->throttle.id = bswap_64(event->throttle.id); 688 event->throttle.stream_id = bswap_64(event->throttle.stream_id); 689 690 if (sample_id_all) 691 swap_sample_id_all(event, &event->throttle + 1); 692} 693 694static void perf_event__namespaces_swap(union perf_event *event, 695 bool sample_id_all) 696{ 697 u64 i; 698 699 event->namespaces.pid = bswap_32(event->namespaces.pid); 700 event->namespaces.tid = bswap_32(event->namespaces.tid); 701 event->namespaces.nr_namespaces = bswap_64(event->namespaces.nr_namespaces); 702 703 for (i = 0; i < event->namespaces.nr_namespaces; i++) { 704 struct perf_ns_link_info *ns = &event->namespaces.link_info[i]; 705 706 ns->dev = bswap_64(ns->dev); 707 ns->ino = bswap_64(ns->ino); 708 } 709 710 if (sample_id_all) 711 swap_sample_id_all(event, &event->namespaces.link_info[i]); 712} 713 714static void perf_event__cgroup_swap(union perf_event *event, bool sample_id_all) 715{ 716 event->cgroup.id = bswap_64(event->cgroup.id); 717 718 if (sample_id_all) { 719 void *data = &event->cgroup.path; 720 721 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 722 swap_sample_id_all(event, data); 723 } 724} 725 726static u8 revbyte(u8 b) 727{ 728 int rev = (b >> 4) | ((b & 0xf) << 4); 729 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 730 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 731 return (u8) rev; 732} 733 734/* 735 * XXX this is hack in attempt to carry flags bitfield 736 * through endian village. ABI says: 737 * 738 * Bit-fields are allocated from right to left (least to most significant) 739 * on little-endian implementations and from left to right (most to least 740 * significant) on big-endian implementations. 741 * 742 * The above seems to be byte specific, so we need to reverse each 743 * byte of the bitfield. 'Internet' also says this might be implementation 744 * specific and we probably need proper fix and carry perf_event_attr 745 * bitfield flags in separate data file FEAT_ section. Thought this seems 746 * to work for now. 747 */ 748static void swap_bitfield(u8 *p, unsigned len) 749{ 750 unsigned i; 751 752 for (i = 0; i < len; i++) { 753 *p = revbyte(*p); 754 p++; 755 } 756} 757 758/* exported for swapping attributes in file header */ 759void perf_event__attr_swap(struct perf_event_attr *attr) 760{ 761 attr->type = bswap_32(attr->type); 762 attr->size = bswap_32(attr->size); 763 764#define bswap_safe(f, n) \ 765 (attr->size > (offsetof(struct perf_event_attr, f) + \ 766 sizeof(attr->f) * (n))) 767#define bswap_field(f, sz) \ 768do { \ 769 if (bswap_safe(f, 0)) \ 770 attr->f = bswap_##sz(attr->f); \ 771} while(0) 772#define bswap_field_16(f) bswap_field(f, 16) 773#define bswap_field_32(f) bswap_field(f, 32) 774#define bswap_field_64(f) bswap_field(f, 64) 775 776 bswap_field_64(config); 777 bswap_field_64(sample_period); 778 bswap_field_64(sample_type); 779 bswap_field_64(read_format); 780 bswap_field_32(wakeup_events); 781 bswap_field_32(bp_type); 782 bswap_field_64(bp_addr); 783 bswap_field_64(bp_len); 784 bswap_field_64(branch_sample_type); 785 bswap_field_64(sample_regs_user); 786 bswap_field_32(sample_stack_user); 787 bswap_field_32(aux_watermark); 788 bswap_field_16(sample_max_stack); 789 bswap_field_32(aux_sample_size); 790 791 /* 792 * After read_format are bitfields. Check read_format because 793 * we are unable to use offsetof on bitfield. 794 */ 795 if (bswap_safe(read_format, 1)) 796 swap_bitfield((u8 *) (&attr->read_format + 1), 797 sizeof(u64)); 798#undef bswap_field_64 799#undef bswap_field_32 800#undef bswap_field 801#undef bswap_safe 802} 803 804static void perf_event__hdr_attr_swap(union perf_event *event, 805 bool sample_id_all __maybe_unused) 806{ 807 size_t size; 808 809 perf_event__attr_swap(&event->attr.attr); 810 811 size = event->header.size; 812 size -= (void *)&event->attr.id - (void *)event; 813 mem_bswap_64(event->attr.id, size); 814} 815 816static void perf_event__event_update_swap(union perf_event *event, 817 bool sample_id_all __maybe_unused) 818{ 819 event->event_update.type = bswap_64(event->event_update.type); 820 event->event_update.id = bswap_64(event->event_update.id); 821} 822 823static void perf_event__event_type_swap(union perf_event *event, 824 bool sample_id_all __maybe_unused) 825{ 826 event->event_type.event_type.event_id = 827 bswap_64(event->event_type.event_type.event_id); 828} 829 830static void perf_event__tracing_data_swap(union perf_event *event, 831 bool sample_id_all __maybe_unused) 832{ 833 event->tracing_data.size = bswap_32(event->tracing_data.size); 834} 835 836static void perf_event__auxtrace_info_swap(union perf_event *event, 837 bool sample_id_all __maybe_unused) 838{ 839 size_t size; 840 841 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type); 842 843 size = event->header.size; 844 size -= (void *)&event->auxtrace_info.priv - (void *)event; 845 mem_bswap_64(event->auxtrace_info.priv, size); 846} 847 848static void perf_event__auxtrace_swap(union perf_event *event, 849 bool sample_id_all __maybe_unused) 850{ 851 event->auxtrace.size = bswap_64(event->auxtrace.size); 852 event->auxtrace.offset = bswap_64(event->auxtrace.offset); 853 event->auxtrace.reference = bswap_64(event->auxtrace.reference); 854 event->auxtrace.idx = bswap_32(event->auxtrace.idx); 855 event->auxtrace.tid = bswap_32(event->auxtrace.tid); 856 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu); 857} 858 859static void perf_event__auxtrace_error_swap(union perf_event *event, 860 bool sample_id_all __maybe_unused) 861{ 862 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type); 863 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code); 864 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu); 865 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid); 866 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid); 867 event->auxtrace_error.fmt = bswap_32(event->auxtrace_error.fmt); 868 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip); 869 if (event->auxtrace_error.fmt) 870 event->auxtrace_error.time = bswap_64(event->auxtrace_error.time); 871} 872 873static void perf_event__thread_map_swap(union perf_event *event, 874 bool sample_id_all __maybe_unused) 875{ 876 unsigned i; 877 878 event->thread_map.nr = bswap_64(event->thread_map.nr); 879 880 for (i = 0; i < event->thread_map.nr; i++) 881 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid); 882} 883 884static void perf_event__cpu_map_swap(union perf_event *event, 885 bool sample_id_all __maybe_unused) 886{ 887 struct perf_record_cpu_map_data *data = &event->cpu_map.data; 888 struct cpu_map_entries *cpus; 889 struct perf_record_record_cpu_map *mask; 890 unsigned i; 891 892 data->type = bswap_64(data->type); 893 894 switch (data->type) { 895 case PERF_CPU_MAP__CPUS: 896 cpus = (struct cpu_map_entries *)data->data; 897 898 cpus->nr = bswap_16(cpus->nr); 899 900 for (i = 0; i < cpus->nr; i++) 901 cpus->cpu[i] = bswap_16(cpus->cpu[i]); 902 break; 903 case PERF_CPU_MAP__MASK: 904 mask = (struct perf_record_record_cpu_map *)data->data; 905 906 mask->nr = bswap_16(mask->nr); 907 mask->long_size = bswap_16(mask->long_size); 908 909 switch (mask->long_size) { 910 case 4: mem_bswap_32(&mask->mask, mask->nr); break; 911 case 8: mem_bswap_64(&mask->mask, mask->nr); break; 912 default: 913 pr_err("cpu_map swap: unsupported long size\n"); 914 } 915 default: 916 break; 917 } 918} 919 920static void perf_event__stat_config_swap(union perf_event *event, 921 bool sample_id_all __maybe_unused) 922{ 923 u64 size; 924 925 size = event->stat_config.nr * sizeof(event->stat_config.data[0]); 926 size += 1; /* nr item itself */ 927 mem_bswap_64(&event->stat_config.nr, size); 928} 929 930static void perf_event__stat_swap(union perf_event *event, 931 bool sample_id_all __maybe_unused) 932{ 933 event->stat.id = bswap_64(event->stat.id); 934 event->stat.thread = bswap_32(event->stat.thread); 935 event->stat.cpu = bswap_32(event->stat.cpu); 936 event->stat.val = bswap_64(event->stat.val); 937 event->stat.ena = bswap_64(event->stat.ena); 938 event->stat.run = bswap_64(event->stat.run); 939} 940 941static void perf_event__stat_round_swap(union perf_event *event, 942 bool sample_id_all __maybe_unused) 943{ 944 event->stat_round.type = bswap_64(event->stat_round.type); 945 event->stat_round.time = bswap_64(event->stat_round.time); 946} 947 948static void perf_event__time_conv_swap(union perf_event *event, 949 bool sample_id_all __maybe_unused) 950{ 951 event->time_conv.time_shift = bswap_64(event->time_conv.time_shift); 952 event->time_conv.time_mult = bswap_64(event->time_conv.time_mult); 953 event->time_conv.time_zero = bswap_64(event->time_conv.time_zero); 954 955 if (event_contains(event->time_conv, time_cycles)) { 956 event->time_conv.time_cycles = bswap_64(event->time_conv.time_cycles); 957 event->time_conv.time_mask = bswap_64(event->time_conv.time_mask); 958 } 959} 960 961typedef void (*perf_event__swap_op)(union perf_event *event, 962 bool sample_id_all); 963 964static perf_event__swap_op perf_event__swap_ops[] = { 965 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 966 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap, 967 [PERF_RECORD_COMM] = perf_event__comm_swap, 968 [PERF_RECORD_FORK] = perf_event__task_swap, 969 [PERF_RECORD_EXIT] = perf_event__task_swap, 970 [PERF_RECORD_LOST] = perf_event__all64_swap, 971 [PERF_RECORD_READ] = perf_event__read_swap, 972 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap, 973 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap, 974 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 975 [PERF_RECORD_AUX] = perf_event__aux_swap, 976 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap, 977 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap, 978 [PERF_RECORD_SWITCH] = perf_event__switch_swap, 979 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap, 980 [PERF_RECORD_NAMESPACES] = perf_event__namespaces_swap, 981 [PERF_RECORD_CGROUP] = perf_event__cgroup_swap, 982 [PERF_RECORD_TEXT_POKE] = perf_event__text_poke_swap, 983 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 984 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 985 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 986 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 987 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap, 988 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap, 989 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap, 990 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap, 991 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap, 992 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap, 993 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap, 994 [PERF_RECORD_STAT] = perf_event__stat_swap, 995 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap, 996 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap, 997 [PERF_RECORD_TIME_CONV] = perf_event__time_conv_swap, 998 [PERF_RECORD_HEADER_MAX] = NULL, 999}; 1000 1001/* 1002 * When perf record finishes a pass on every buffers, it records this pseudo 1003 * event. 1004 * We record the max timestamp t found in the pass n. 1005 * Assuming these timestamps are monotonic across cpus, we know that if 1006 * a buffer still has events with timestamps below t, they will be all 1007 * available and then read in the pass n + 1. 1008 * Hence when we start to read the pass n + 2, we can safely flush every 1009 * events with timestamps below t. 1010 * 1011 * ============ PASS n ================= 1012 * CPU 0 | CPU 1 1013 * | 1014 * cnt1 timestamps | cnt2 timestamps 1015 * 1 | 2 1016 * 2 | 3 1017 * - | 4 <--- max recorded 1018 * 1019 * ============ PASS n + 1 ============== 1020 * CPU 0 | CPU 1 1021 * | 1022 * cnt1 timestamps | cnt2 timestamps 1023 * 3 | 5 1024 * 4 | 6 1025 * 5 | 7 <---- max recorded 1026 * 1027 * Flush every events below timestamp 4 1028 * 1029 * ============ PASS n + 2 ============== 1030 * CPU 0 | CPU 1 1031 * | 1032 * cnt1 timestamps | cnt2 timestamps 1033 * 6 | 8 1034 * 7 | 9 1035 * - | 10 1036 * 1037 * Flush every events below timestamp 7 1038 * etc... 1039 */ 1040static int process_finished_round(struct perf_tool *tool __maybe_unused, 1041 union perf_event *event __maybe_unused, 1042 struct ordered_events *oe) 1043{ 1044 if (dump_trace) 1045 fprintf(stdout, "\n"); 1046 return ordered_events__flush(oe, OE_FLUSH__ROUND); 1047} 1048 1049int perf_session__queue_event(struct perf_session *s, union perf_event *event, 1050 u64 timestamp, u64 file_offset) 1051{ 1052 return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset); 1053} 1054 1055static void callchain__lbr_callstack_printf(struct perf_sample *sample) 1056{ 1057 struct ip_callchain *callchain = sample->callchain; 1058 struct branch_stack *lbr_stack = sample->branch_stack; 1059 struct branch_entry *entries = perf_sample__branch_entries(sample); 1060 u64 kernel_callchain_nr = callchain->nr; 1061 unsigned int i; 1062 1063 for (i = 0; i < kernel_callchain_nr; i++) { 1064 if (callchain->ips[i] == PERF_CONTEXT_USER) 1065 break; 1066 } 1067 1068 if ((i != kernel_callchain_nr) && lbr_stack->nr) { 1069 u64 total_nr; 1070 /* 1071 * LBR callstack can only get user call chain, 1072 * i is kernel call chain number, 1073 * 1 is PERF_CONTEXT_USER. 1074 * 1075 * The user call chain is stored in LBR registers. 1076 * LBR are pair registers. The caller is stored 1077 * in "from" register, while the callee is stored 1078 * in "to" register. 1079 * For example, there is a call stack 1080 * "A"->"B"->"C"->"D". 1081 * The LBR registers will recorde like 1082 * "C"->"D", "B"->"C", "A"->"B". 1083 * So only the first "to" register and all "from" 1084 * registers are needed to construct the whole stack. 1085 */ 1086 total_nr = i + 1 + lbr_stack->nr + 1; 1087 kernel_callchain_nr = i + 1; 1088 1089 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr); 1090 1091 for (i = 0; i < kernel_callchain_nr; i++) 1092 printf("..... %2d: %016" PRIx64 "\n", 1093 i, callchain->ips[i]); 1094 1095 printf("..... %2d: %016" PRIx64 "\n", 1096 (int)(kernel_callchain_nr), entries[0].to); 1097 for (i = 0; i < lbr_stack->nr; i++) 1098 printf("..... %2d: %016" PRIx64 "\n", 1099 (int)(i + kernel_callchain_nr + 1), entries[i].from); 1100 } 1101} 1102 1103static void callchain__printf(struct evsel *evsel, 1104 struct perf_sample *sample) 1105{ 1106 unsigned int i; 1107 struct ip_callchain *callchain = sample->callchain; 1108 1109 if (evsel__has_branch_callstack(evsel)) 1110 callchain__lbr_callstack_printf(sample); 1111 1112 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr); 1113 1114 for (i = 0; i < callchain->nr; i++) 1115 printf("..... %2d: %016" PRIx64 "\n", 1116 i, callchain->ips[i]); 1117} 1118 1119static void branch_stack__printf(struct perf_sample *sample, bool callstack) 1120{ 1121 struct branch_entry *entries = perf_sample__branch_entries(sample); 1122 uint64_t i; 1123 1124 printf("%s: nr:%" PRIu64 "\n", 1125 !callstack ? "... branch stack" : "... branch callstack", 1126 sample->branch_stack->nr); 1127 1128 for (i = 0; i < sample->branch_stack->nr; i++) { 1129 struct branch_entry *e = &entries[i]; 1130 1131 if (!callstack) { 1132 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n", 1133 i, e->from, e->to, 1134 (unsigned short)e->flags.cycles, 1135 e->flags.mispred ? "M" : " ", 1136 e->flags.predicted ? "P" : " ", 1137 e->flags.abort ? "A" : " ", 1138 e->flags.in_tx ? "T" : " ", 1139 (unsigned)e->flags.reserved); 1140 } else { 1141 printf("..... %2"PRIu64": %016" PRIx64 "\n", 1142 i, i > 0 ? e->from : e->to); 1143 } 1144 } 1145} 1146 1147static void regs_dump__printf(u64 mask, u64 *regs) 1148{ 1149 unsigned rid, i = 0; 1150 1151 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { 1152 u64 val = regs[i++]; 1153 1154 printf(".... %-5s 0x%016" PRIx64 "\n", 1155 perf_reg_name(rid), val); 1156 } 1157} 1158 1159static const char *regs_abi[] = { 1160 [PERF_SAMPLE_REGS_ABI_NONE] = "none", 1161 [PERF_SAMPLE_REGS_ABI_32] = "32-bit", 1162 [PERF_SAMPLE_REGS_ABI_64] = "64-bit", 1163}; 1164 1165static inline const char *regs_dump_abi(struct regs_dump *d) 1166{ 1167 if (d->abi > PERF_SAMPLE_REGS_ABI_64) 1168 return "unknown"; 1169 1170 return regs_abi[d->abi]; 1171} 1172 1173static void regs__printf(const char *type, struct regs_dump *regs) 1174{ 1175 u64 mask = regs->mask; 1176 1177 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n", 1178 type, 1179 mask, 1180 regs_dump_abi(regs)); 1181 1182 regs_dump__printf(mask, regs->regs); 1183} 1184 1185static void regs_user__printf(struct perf_sample *sample) 1186{ 1187 struct regs_dump *user_regs = &sample->user_regs; 1188 1189 if (user_regs->regs) 1190 regs__printf("user", user_regs); 1191} 1192 1193static void regs_intr__printf(struct perf_sample *sample) 1194{ 1195 struct regs_dump *intr_regs = &sample->intr_regs; 1196 1197 if (intr_regs->regs) 1198 regs__printf("intr", intr_regs); 1199} 1200 1201static void stack_user__printf(struct stack_dump *dump) 1202{ 1203 printf("... ustack: size %" PRIu64 ", offset 0x%x\n", 1204 dump->size, dump->offset); 1205} 1206 1207static void perf_evlist__print_tstamp(struct evlist *evlist, 1208 union perf_event *event, 1209 struct perf_sample *sample) 1210{ 1211 u64 sample_type = __evlist__combined_sample_type(evlist); 1212 1213 if (event->header.type != PERF_RECORD_SAMPLE && 1214 !evlist__sample_id_all(evlist)) { 1215 fputs("-1 -1 ", stdout); 1216 return; 1217 } 1218 1219 if ((sample_type & PERF_SAMPLE_CPU)) 1220 printf("%u ", sample->cpu); 1221 1222 if (sample_type & PERF_SAMPLE_TIME) 1223 printf("%" PRIu64 " ", sample->time); 1224} 1225 1226static void sample_read__printf(struct perf_sample *sample, u64 read_format) 1227{ 1228 printf("... sample_read:\n"); 1229 1230 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1231 printf("...... time enabled %016" PRIx64 "\n", 1232 sample->read.time_enabled); 1233 1234 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1235 printf("...... time running %016" PRIx64 "\n", 1236 sample->read.time_running); 1237 1238 if (read_format & PERF_FORMAT_GROUP) { 1239 u64 i; 1240 1241 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr); 1242 1243 for (i = 0; i < sample->read.group.nr; i++) { 1244 struct sample_read_value *value; 1245 1246 value = &sample->read.group.values[i]; 1247 printf("..... id %016" PRIx64 1248 ", value %016" PRIx64 "\n", 1249 value->id, value->value); 1250 } 1251 } else 1252 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n", 1253 sample->read.one.id, sample->read.one.value); 1254} 1255 1256static void dump_event(struct evlist *evlist, union perf_event *event, 1257 u64 file_offset, struct perf_sample *sample) 1258{ 1259 if (!dump_trace) 1260 return; 1261 1262 printf("\n%#" PRIx64 " [%#x]: event: %d\n", 1263 file_offset, event->header.size, event->header.type); 1264 1265 trace_event(event); 1266 if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw) 1267 evlist->trace_event_sample_raw(evlist, event, sample); 1268 1269 if (sample) 1270 perf_evlist__print_tstamp(evlist, event, sample); 1271 1272 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 1273 event->header.size, perf_event__name(event->header.type)); 1274} 1275 1276static void dump_sample(struct evsel *evsel, union perf_event *event, 1277 struct perf_sample *sample) 1278{ 1279 u64 sample_type; 1280 1281 if (!dump_trace) 1282 return; 1283 1284 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 1285 event->header.misc, sample->pid, sample->tid, sample->ip, 1286 sample->period, sample->addr); 1287 1288 sample_type = evsel->core.attr.sample_type; 1289 1290 if (evsel__has_callchain(evsel)) 1291 callchain__printf(evsel, sample); 1292 1293 if (evsel__has_br_stack(evsel)) 1294 branch_stack__printf(sample, evsel__has_branch_callstack(evsel)); 1295 1296 if (sample_type & PERF_SAMPLE_REGS_USER) 1297 regs_user__printf(sample); 1298 1299 if (sample_type & PERF_SAMPLE_REGS_INTR) 1300 regs_intr__printf(sample); 1301 1302 if (sample_type & PERF_SAMPLE_STACK_USER) 1303 stack_user__printf(&sample->user_stack); 1304 1305 if (sample_type & PERF_SAMPLE_WEIGHT) 1306 printf("... weight: %" PRIu64 "\n", sample->weight); 1307 1308 if (sample_type & PERF_SAMPLE_DATA_SRC) 1309 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src); 1310 1311 if (sample_type & PERF_SAMPLE_PHYS_ADDR) 1312 printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr); 1313 1314 if (sample_type & PERF_SAMPLE_TRANSACTION) 1315 printf("... transaction: %" PRIx64 "\n", sample->transaction); 1316 1317 if (sample_type & PERF_SAMPLE_READ) 1318 sample_read__printf(sample, evsel->core.attr.read_format); 1319} 1320 1321static void dump_read(struct evsel *evsel, union perf_event *event) 1322{ 1323 struct perf_record_read *read_event = &event->read; 1324 u64 read_format; 1325 1326 if (!dump_trace) 1327 return; 1328 1329 printf(": %d %d %s %" PRI_lu64 "\n", event->read.pid, event->read.tid, 1330 evsel__name(evsel), event->read.value); 1331 1332 if (!evsel) 1333 return; 1334 1335 read_format = evsel->core.attr.read_format; 1336 1337 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1338 printf("... time enabled : %" PRI_lu64 "\n", read_event->time_enabled); 1339 1340 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1341 printf("... time running : %" PRI_lu64 "\n", read_event->time_running); 1342 1343 if (read_format & PERF_FORMAT_ID) 1344 printf("... id : %" PRI_lu64 "\n", read_event->id); 1345} 1346 1347static struct machine *machines__find_for_cpumode(struct machines *machines, 1348 union perf_event *event, 1349 struct perf_sample *sample) 1350{ 1351 struct machine *machine; 1352 1353 if (perf_guest && 1354 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 1355 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) { 1356 u32 pid; 1357 1358 if (event->header.type == PERF_RECORD_MMAP 1359 || event->header.type == PERF_RECORD_MMAP2) 1360 pid = event->mmap.pid; 1361 else 1362 pid = sample->pid; 1363 1364 machine = machines__find(machines, pid); 1365 if (!machine) 1366 machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID); 1367 return machine; 1368 } 1369 1370 return &machines->host; 1371} 1372 1373static int deliver_sample_value(struct evlist *evlist, 1374 struct perf_tool *tool, 1375 union perf_event *event, 1376 struct perf_sample *sample, 1377 struct sample_read_value *v, 1378 struct machine *machine) 1379{ 1380 struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id); 1381 struct evsel *evsel; 1382 1383 if (sid) { 1384 sample->id = v->id; 1385 sample->period = v->value - sid->period; 1386 sid->period = v->value; 1387 } 1388 1389 if (!sid || sid->evsel == NULL) { 1390 ++evlist->stats.nr_unknown_id; 1391 return 0; 1392 } 1393 1394 /* 1395 * There's no reason to deliver sample 1396 * for zero period, bail out. 1397 */ 1398 if (!sample->period) 1399 return 0; 1400 1401 evsel = container_of(sid->evsel, struct evsel, core); 1402 return tool->sample(tool, event, sample, evsel, machine); 1403} 1404 1405static int deliver_sample_group(struct evlist *evlist, 1406 struct perf_tool *tool, 1407 union perf_event *event, 1408 struct perf_sample *sample, 1409 struct machine *machine) 1410{ 1411 int ret = -EINVAL; 1412 u64 i; 1413 1414 for (i = 0; i < sample->read.group.nr; i++) { 1415 ret = deliver_sample_value(evlist, tool, event, sample, 1416 &sample->read.group.values[i], 1417 machine); 1418 if (ret) 1419 break; 1420 } 1421 1422 return ret; 1423} 1424 1425static int 1426 perf_evlist__deliver_sample(struct evlist *evlist, 1427 struct perf_tool *tool, 1428 union perf_event *event, 1429 struct perf_sample *sample, 1430 struct evsel *evsel, 1431 struct machine *machine) 1432{ 1433 /* We know evsel != NULL. */ 1434 u64 sample_type = evsel->core.attr.sample_type; 1435 u64 read_format = evsel->core.attr.read_format; 1436 1437 /* Standard sample delivery. */ 1438 if (!(sample_type & PERF_SAMPLE_READ)) 1439 return tool->sample(tool, event, sample, evsel, machine); 1440 1441 /* For PERF_SAMPLE_READ we have either single or group mode. */ 1442 if (read_format & PERF_FORMAT_GROUP) 1443 return deliver_sample_group(evlist, tool, event, sample, 1444 machine); 1445 else 1446 return deliver_sample_value(evlist, tool, event, sample, 1447 &sample->read.one, machine); 1448} 1449 1450static int machines__deliver_event(struct machines *machines, 1451 struct evlist *evlist, 1452 union perf_event *event, 1453 struct perf_sample *sample, 1454 struct perf_tool *tool, u64 file_offset) 1455{ 1456 struct evsel *evsel; 1457 struct machine *machine; 1458 1459 dump_event(evlist, event, file_offset, sample); 1460 1461 evsel = perf_evlist__id2evsel(evlist, sample->id); 1462 1463 machine = machines__find_for_cpumode(machines, event, sample); 1464 1465 switch (event->header.type) { 1466 case PERF_RECORD_SAMPLE: 1467 if (evsel == NULL) { 1468 ++evlist->stats.nr_unknown_id; 1469 return 0; 1470 } 1471 dump_sample(evsel, event, sample); 1472 if (machine == NULL) { 1473 ++evlist->stats.nr_unprocessable_samples; 1474 return 0; 1475 } 1476 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine); 1477 case PERF_RECORD_MMAP: 1478 return tool->mmap(tool, event, sample, machine); 1479 case PERF_RECORD_MMAP2: 1480 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT) 1481 ++evlist->stats.nr_proc_map_timeout; 1482 return tool->mmap2(tool, event, sample, machine); 1483 case PERF_RECORD_COMM: 1484 return tool->comm(tool, event, sample, machine); 1485 case PERF_RECORD_NAMESPACES: 1486 return tool->namespaces(tool, event, sample, machine); 1487 case PERF_RECORD_CGROUP: 1488 return tool->cgroup(tool, event, sample, machine); 1489 case PERF_RECORD_FORK: 1490 return tool->fork(tool, event, sample, machine); 1491 case PERF_RECORD_EXIT: 1492 return tool->exit(tool, event, sample, machine); 1493 case PERF_RECORD_LOST: 1494 if (tool->lost == perf_event__process_lost) 1495 evlist->stats.total_lost += event->lost.lost; 1496 return tool->lost(tool, event, sample, machine); 1497 case PERF_RECORD_LOST_SAMPLES: 1498 if (tool->lost_samples == perf_event__process_lost_samples) 1499 evlist->stats.total_lost_samples += event->lost_samples.lost; 1500 return tool->lost_samples(tool, event, sample, machine); 1501 case PERF_RECORD_READ: 1502 dump_read(evsel, event); 1503 return tool->read(tool, event, sample, evsel, machine); 1504 case PERF_RECORD_THROTTLE: 1505 return tool->throttle(tool, event, sample, machine); 1506 case PERF_RECORD_UNTHROTTLE: 1507 return tool->unthrottle(tool, event, sample, machine); 1508 case PERF_RECORD_AUX: 1509 if (tool->aux == perf_event__process_aux) { 1510 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) 1511 evlist->stats.total_aux_lost += 1; 1512 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL) 1513 evlist->stats.total_aux_partial += 1; 1514 } 1515 return tool->aux(tool, event, sample, machine); 1516 case PERF_RECORD_ITRACE_START: 1517 return tool->itrace_start(tool, event, sample, machine); 1518 case PERF_RECORD_SWITCH: 1519 case PERF_RECORD_SWITCH_CPU_WIDE: 1520 return tool->context_switch(tool, event, sample, machine); 1521 case PERF_RECORD_KSYMBOL: 1522 return tool->ksymbol(tool, event, sample, machine); 1523 case PERF_RECORD_BPF_EVENT: 1524 return tool->bpf(tool, event, sample, machine); 1525 case PERF_RECORD_TEXT_POKE: 1526 return tool->text_poke(tool, event, sample, machine); 1527 default: 1528 ++evlist->stats.nr_unknown_events; 1529 return -1; 1530 } 1531} 1532 1533static int perf_session__deliver_event(struct perf_session *session, 1534 union perf_event *event, 1535 struct perf_tool *tool, 1536 u64 file_offset) 1537{ 1538 struct perf_sample sample; 1539 int ret; 1540 1541 ret = perf_evlist__parse_sample(session->evlist, event, &sample); 1542 if (ret) { 1543 pr_err("Can't parse sample, err = %d\n", ret); 1544 return ret; 1545 } 1546 1547 ret = auxtrace__process_event(session, event, &sample, tool); 1548 if (ret < 0) 1549 return ret; 1550 if (ret > 0) 1551 return 0; 1552 1553 ret = machines__deliver_event(&session->machines, session->evlist, 1554 event, &sample, tool, file_offset); 1555 1556 if (dump_trace && sample.aux_sample.size) 1557 auxtrace__dump_auxtrace_sample(session, &sample); 1558 1559 return ret; 1560} 1561 1562static s64 perf_session__process_user_event(struct perf_session *session, 1563 union perf_event *event, 1564 u64 file_offset) 1565{ 1566 struct ordered_events *oe = &session->ordered_events; 1567 struct perf_tool *tool = session->tool; 1568 struct perf_sample sample = { .time = 0, }; 1569 int fd = perf_data__fd(session->data); 1570 int err; 1571 1572 if (event->header.type != PERF_RECORD_COMPRESSED || 1573 tool->compressed == perf_session__process_compressed_event_stub) 1574 dump_event(session->evlist, event, file_offset, &sample); 1575 1576 /* These events are processed right away */ 1577 switch (event->header.type) { 1578 case PERF_RECORD_HEADER_ATTR: 1579 err = tool->attr(tool, event, &session->evlist); 1580 if (err == 0) { 1581 perf_session__set_id_hdr_size(session); 1582 perf_session__set_comm_exec(session); 1583 } 1584 return err; 1585 case PERF_RECORD_EVENT_UPDATE: 1586 return tool->event_update(tool, event, &session->evlist); 1587 case PERF_RECORD_HEADER_EVENT_TYPE: 1588 /* 1589 * Depreceated, but we need to handle it for sake 1590 * of old data files create in pipe mode. 1591 */ 1592 return 0; 1593 case PERF_RECORD_HEADER_TRACING_DATA: 1594 /* 1595 * Setup for reading amidst mmap, but only when we 1596 * are in 'file' mode. The 'pipe' fd is in proper 1597 * place already. 1598 */ 1599 if (!perf_data__is_pipe(session->data)) 1600 lseek(fd, file_offset, SEEK_SET); 1601 return tool->tracing_data(session, event); 1602 case PERF_RECORD_HEADER_BUILD_ID: 1603 return tool->build_id(session, event); 1604 case PERF_RECORD_FINISHED_ROUND: 1605 return tool->finished_round(tool, event, oe); 1606 case PERF_RECORD_ID_INDEX: 1607 return tool->id_index(session, event); 1608 case PERF_RECORD_AUXTRACE_INFO: 1609 return tool->auxtrace_info(session, event); 1610 case PERF_RECORD_AUXTRACE: 1611 /* setup for reading amidst mmap */ 1612 lseek(fd, file_offset + event->header.size, SEEK_SET); 1613 return tool->auxtrace(session, event); 1614 case PERF_RECORD_AUXTRACE_ERROR: 1615 perf_session__auxtrace_error_inc(session, event); 1616 return tool->auxtrace_error(session, event); 1617 case PERF_RECORD_THREAD_MAP: 1618 return tool->thread_map(session, event); 1619 case PERF_RECORD_CPU_MAP: 1620 return tool->cpu_map(session, event); 1621 case PERF_RECORD_STAT_CONFIG: 1622 return tool->stat_config(session, event); 1623 case PERF_RECORD_STAT: 1624 return tool->stat(session, event); 1625 case PERF_RECORD_STAT_ROUND: 1626 return tool->stat_round(session, event); 1627 case PERF_RECORD_TIME_CONV: 1628 session->time_conv = event->time_conv; 1629 return tool->time_conv(session, event); 1630 case PERF_RECORD_HEADER_FEATURE: 1631 return tool->feature(session, event); 1632 case PERF_RECORD_COMPRESSED: 1633 err = tool->compressed(session, event, file_offset); 1634 if (err) 1635 dump_event(session->evlist, event, file_offset, &sample); 1636 return err; 1637 default: 1638 return -EINVAL; 1639 } 1640} 1641 1642int perf_session__deliver_synth_event(struct perf_session *session, 1643 union perf_event *event, 1644 struct perf_sample *sample) 1645{ 1646 struct evlist *evlist = session->evlist; 1647 struct perf_tool *tool = session->tool; 1648 1649 events_stats__inc(&evlist->stats, event->header.type); 1650 1651 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1652 return perf_session__process_user_event(session, event, 0); 1653 1654 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0); 1655} 1656 1657static void event_swap(union perf_event *event, bool sample_id_all) 1658{ 1659 perf_event__swap_op swap; 1660 1661 swap = perf_event__swap_ops[event->header.type]; 1662 if (swap) 1663 swap(event, sample_id_all); 1664} 1665 1666int perf_session__peek_event(struct perf_session *session, off_t file_offset, 1667 void *buf, size_t buf_sz, 1668 union perf_event **event_ptr, 1669 struct perf_sample *sample) 1670{ 1671 union perf_event *event; 1672 size_t hdr_sz, rest; 1673 int fd; 1674 1675 if (session->one_mmap && !session->header.needs_swap) { 1676 event = file_offset - session->one_mmap_offset + 1677 session->one_mmap_addr; 1678 goto out_parse_sample; 1679 } 1680 1681 if (perf_data__is_pipe(session->data)) 1682 return -1; 1683 1684 fd = perf_data__fd(session->data); 1685 hdr_sz = sizeof(struct perf_event_header); 1686 1687 if (buf_sz < hdr_sz) 1688 return -1; 1689 1690 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 || 1691 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz) 1692 return -1; 1693 1694 event = (union perf_event *)buf; 1695 1696 if (session->header.needs_swap) 1697 perf_event_header__bswap(&event->header); 1698 1699 if (event->header.size < hdr_sz || event->header.size > buf_sz) 1700 return -1; 1701 1702 buf += hdr_sz; 1703 rest = event->header.size - hdr_sz; 1704 1705 if (readn(fd, buf, rest) != (ssize_t)rest) 1706 return -1; 1707 1708 if (session->header.needs_swap) 1709 event_swap(event, evlist__sample_id_all(session->evlist)); 1710 1711out_parse_sample: 1712 1713 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START && 1714 perf_evlist__parse_sample(session->evlist, event, sample)) 1715 return -1; 1716 1717 *event_ptr = event; 1718 1719 return 0; 1720} 1721 1722int perf_session__peek_events(struct perf_session *session, u64 offset, 1723 u64 size, peek_events_cb_t cb, void *data) 1724{ 1725 u64 max_offset = offset + size; 1726 char buf[PERF_SAMPLE_MAX_SIZE]; 1727 union perf_event *event; 1728 int err; 1729 1730 do { 1731 err = perf_session__peek_event(session, offset, buf, 1732 PERF_SAMPLE_MAX_SIZE, &event, 1733 NULL); 1734 if (err) 1735 return err; 1736 1737 err = cb(session, event, offset, data); 1738 if (err) 1739 return err; 1740 1741 offset += event->header.size; 1742 if (event->header.type == PERF_RECORD_AUXTRACE) 1743 offset += event->auxtrace.size; 1744 1745 } while (offset < max_offset); 1746 1747 return err; 1748} 1749 1750static s64 perf_session__process_event(struct perf_session *session, 1751 union perf_event *event, u64 file_offset) 1752{ 1753 struct evlist *evlist = session->evlist; 1754 struct perf_tool *tool = session->tool; 1755 int ret; 1756 1757 if (session->header.needs_swap) 1758 event_swap(event, evlist__sample_id_all(evlist)); 1759 1760 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1761 return -EINVAL; 1762 1763 events_stats__inc(&evlist->stats, event->header.type); 1764 1765 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1766 return perf_session__process_user_event(session, event, file_offset); 1767 1768 if (tool->ordered_events) { 1769 u64 timestamp = -1ULL; 1770 1771 ret = perf_evlist__parse_sample_timestamp(evlist, event, ×tamp); 1772 if (ret && ret != -1) 1773 return ret; 1774 1775 ret = perf_session__queue_event(session, event, timestamp, file_offset); 1776 if (ret != -ETIME) 1777 return ret; 1778 } 1779 1780 return perf_session__deliver_event(session, event, tool, file_offset); 1781} 1782 1783void perf_event_header__bswap(struct perf_event_header *hdr) 1784{ 1785 hdr->type = bswap_32(hdr->type); 1786 hdr->misc = bswap_16(hdr->misc); 1787 hdr->size = bswap_16(hdr->size); 1788} 1789 1790struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1791{ 1792 return machine__findnew_thread(&session->machines.host, -1, pid); 1793} 1794 1795/* 1796 * Threads are identified by pid and tid, and the idle task has pid == tid == 0. 1797 * So here a single thread is created for that, but actually there is a separate 1798 * idle task per cpu, so there should be one 'struct thread' per cpu, but there 1799 * is only 1. That causes problems for some tools, requiring workarounds. For 1800 * example get_idle_thread() in builtin-sched.c, or thread_stack__per_cpu(). 1801 */ 1802int perf_session__register_idle_thread(struct perf_session *session) 1803{ 1804 struct thread *thread; 1805 int err = 0; 1806 1807 thread = machine__findnew_thread(&session->machines.host, 0, 0); 1808 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) { 1809 pr_err("problem inserting idle task.\n"); 1810 err = -1; 1811 } 1812 1813 if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) { 1814 pr_err("problem inserting idle task.\n"); 1815 err = -1; 1816 } 1817 1818 /* machine__findnew_thread() got the thread, so put it */ 1819 thread__put(thread); 1820 return err; 1821} 1822 1823static void 1824perf_session__warn_order(const struct perf_session *session) 1825{ 1826 const struct ordered_events *oe = &session->ordered_events; 1827 struct evsel *evsel; 1828 bool should_warn = true; 1829 1830 evlist__for_each_entry(session->evlist, evsel) { 1831 if (evsel->core.attr.write_backward) 1832 should_warn = false; 1833 } 1834 1835 if (!should_warn) 1836 return; 1837 if (oe->nr_unordered_events != 0) 1838 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events); 1839} 1840 1841static void perf_session__warn_about_errors(const struct perf_session *session) 1842{ 1843 const struct events_stats *stats = &session->evlist->stats; 1844 1845 if (session->tool->lost == perf_event__process_lost && 1846 stats->nr_events[PERF_RECORD_LOST] != 0) { 1847 ui__warning("Processed %d events and lost %d chunks!\n\n" 1848 "Check IO/CPU overload!\n\n", 1849 stats->nr_events[0], 1850 stats->nr_events[PERF_RECORD_LOST]); 1851 } 1852 1853 if (session->tool->lost_samples == perf_event__process_lost_samples) { 1854 double drop_rate; 1855 1856 drop_rate = (double)stats->total_lost_samples / 1857 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples); 1858 if (drop_rate > 0.05) { 1859 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n", 1860 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples, 1861 drop_rate * 100.0); 1862 } 1863 } 1864 1865 if (session->tool->aux == perf_event__process_aux && 1866 stats->total_aux_lost != 0) { 1867 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n", 1868 stats->total_aux_lost, 1869 stats->nr_events[PERF_RECORD_AUX]); 1870 } 1871 1872 if (session->tool->aux == perf_event__process_aux && 1873 stats->total_aux_partial != 0) { 1874 bool vmm_exclusive = false; 1875 1876 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive", 1877 &vmm_exclusive); 1878 1879 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n" 1880 "Are you running a KVM guest in the background?%s\n\n", 1881 stats->total_aux_partial, 1882 stats->nr_events[PERF_RECORD_AUX], 1883 vmm_exclusive ? 1884 "\nReloading kvm_intel module with vmm_exclusive=0\n" 1885 "will reduce the gaps to only guest's timeslices." : 1886 ""); 1887 } 1888 1889 if (stats->nr_unknown_events != 0) { 1890 ui__warning("Found %u unknown events!\n\n" 1891 "Is this an older tool processing a perf.data " 1892 "file generated by a more recent tool?\n\n" 1893 "If that is not the case, consider " 1894 "reporting to linux-kernel@vger.kernel.org.\n\n", 1895 stats->nr_unknown_events); 1896 } 1897 1898 if (stats->nr_unknown_id != 0) { 1899 ui__warning("%u samples with id not present in the header\n", 1900 stats->nr_unknown_id); 1901 } 1902 1903 if (stats->nr_invalid_chains != 0) { 1904 ui__warning("Found invalid callchains!\n\n" 1905 "%u out of %u events were discarded for this reason.\n\n" 1906 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1907 stats->nr_invalid_chains, 1908 stats->nr_events[PERF_RECORD_SAMPLE]); 1909 } 1910 1911 if (stats->nr_unprocessable_samples != 0) { 1912 ui__warning("%u unprocessable samples recorded.\n" 1913 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1914 stats->nr_unprocessable_samples); 1915 } 1916 1917 perf_session__warn_order(session); 1918 1919 events_stats__auxtrace_error_warn(stats); 1920 1921 if (stats->nr_proc_map_timeout != 0) { 1922 ui__warning("%d map information files for pre-existing threads were\n" 1923 "not processed, if there are samples for addresses they\n" 1924 "will not be resolved, you may find out which are these\n" 1925 "threads by running with -v and redirecting the output\n" 1926 "to a file.\n" 1927 "The time limit to process proc map is too short?\n" 1928 "Increase it by --proc-map-timeout\n", 1929 stats->nr_proc_map_timeout); 1930 } 1931} 1932 1933static int perf_session__flush_thread_stack(struct thread *thread, 1934 void *p __maybe_unused) 1935{ 1936 return thread_stack__flush(thread); 1937} 1938 1939static int perf_session__flush_thread_stacks(struct perf_session *session) 1940{ 1941 return machines__for_each_thread(&session->machines, 1942 perf_session__flush_thread_stack, 1943 NULL); 1944} 1945 1946volatile int session_done; 1947 1948static int __perf_session__process_decomp_events(struct perf_session *session); 1949 1950static int __perf_session__process_pipe_events(struct perf_session *session) 1951{ 1952 struct ordered_events *oe = &session->ordered_events; 1953 struct perf_tool *tool = session->tool; 1954 int fd = perf_data__fd(session->data); 1955 union perf_event *event; 1956 uint32_t size, cur_size = 0; 1957 void *buf = NULL; 1958 s64 skip = 0; 1959 u64 head; 1960 ssize_t err; 1961 void *p; 1962 1963 perf_tool__fill_defaults(tool); 1964 1965 head = 0; 1966 cur_size = sizeof(union perf_event); 1967 1968 buf = malloc(cur_size); 1969 if (!buf) 1970 return -errno; 1971 ordered_events__set_copy_on_queue(oe, true); 1972more: 1973 event = buf; 1974 err = readn(fd, event, sizeof(struct perf_event_header)); 1975 if (err <= 0) { 1976 if (err == 0) 1977 goto done; 1978 1979 pr_err("failed to read event header\n"); 1980 goto out_err; 1981 } 1982 1983 if (session->header.needs_swap) 1984 perf_event_header__bswap(&event->header); 1985 1986 size = event->header.size; 1987 if (size < sizeof(struct perf_event_header)) { 1988 pr_err("bad event header size\n"); 1989 goto out_err; 1990 } 1991 1992 if (size > cur_size) { 1993 void *new = realloc(buf, size); 1994 if (!new) { 1995 pr_err("failed to allocate memory to read event\n"); 1996 goto out_err; 1997 } 1998 buf = new; 1999 cur_size = size; 2000 event = buf; 2001 } 2002 p = event; 2003 p += sizeof(struct perf_event_header); 2004 2005 if (size - sizeof(struct perf_event_header)) { 2006 err = readn(fd, p, size - sizeof(struct perf_event_header)); 2007 if (err <= 0) { 2008 if (err == 0) { 2009 pr_err("unexpected end of event stream\n"); 2010 goto done; 2011 } 2012 2013 pr_err("failed to read event data\n"); 2014 goto out_err; 2015 } 2016 } 2017 2018 if ((skip = perf_session__process_event(session, event, head)) < 0) { 2019 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 2020 head, event->header.size, event->header.type); 2021 err = -EINVAL; 2022 goto out_err; 2023 } 2024 2025 head += size; 2026 2027 if (skip > 0) 2028 head += skip; 2029 2030 err = __perf_session__process_decomp_events(session); 2031 if (err) 2032 goto out_err; 2033 2034 if (!session_done()) 2035 goto more; 2036done: 2037 /* do the final flush for ordered samples */ 2038 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 2039 if (err) 2040 goto out_err; 2041 err = auxtrace__flush_events(session, tool); 2042 if (err) 2043 goto out_err; 2044 err = perf_session__flush_thread_stacks(session); 2045out_err: 2046 free(buf); 2047 if (!tool->no_warn) 2048 perf_session__warn_about_errors(session); 2049 ordered_events__free(&session->ordered_events); 2050 auxtrace__free_events(session); 2051 return err; 2052} 2053 2054static union perf_event * 2055prefetch_event(char *buf, u64 head, size_t mmap_size, 2056 bool needs_swap, union perf_event *error) 2057{ 2058 union perf_event *event; 2059 u16 event_size; 2060 2061 /* 2062 * Ensure we have enough space remaining to read 2063 * the size of the event in the headers. 2064 */ 2065 if (head + sizeof(event->header) > mmap_size) 2066 return NULL; 2067 2068 event = (union perf_event *)(buf + head); 2069 if (needs_swap) 2070 perf_event_header__bswap(&event->header); 2071 2072 event_size = event->header.size; 2073 if (head + event_size <= mmap_size) 2074 return event; 2075 2076 /* We're not fetching the event so swap back again */ 2077 if (needs_swap) 2078 perf_event_header__bswap(&event->header); 2079 2080 /* Check if the event fits into the next mmapped buf. */ 2081 if (event_size <= mmap_size - head % page_size) { 2082 /* Remap buf and fetch again. */ 2083 return NULL; 2084 } 2085 2086 /* Invalid input. Event size should never exceed mmap_size. */ 2087 pr_debug("%s: head=%#" PRIx64 " event->header.size=%#x, mmap_size=%#zx:" 2088 " fuzzed or compressed perf.data?\n", __func__, head, event_size, mmap_size); 2089 2090 return error; 2091} 2092 2093static union perf_event * 2094fetch_mmaped_event(u64 head, size_t mmap_size, char *buf, bool needs_swap) 2095{ 2096 return prefetch_event(buf, head, mmap_size, needs_swap, ERR_PTR(-EINVAL)); 2097} 2098 2099static union perf_event * 2100fetch_decomp_event(u64 head, size_t mmap_size, char *buf, bool needs_swap) 2101{ 2102 return prefetch_event(buf, head, mmap_size, needs_swap, NULL); 2103} 2104 2105static int __perf_session__process_decomp_events(struct perf_session *session) 2106{ 2107 s64 skip; 2108 u64 size, file_pos = 0; 2109 struct decomp *decomp = session->decomp_last; 2110 2111 if (!decomp) 2112 return 0; 2113 2114 while (decomp->head < decomp->size && !session_done()) { 2115 union perf_event *event = fetch_decomp_event(decomp->head, decomp->size, decomp->data, 2116 session->header.needs_swap); 2117 2118 if (!event) 2119 break; 2120 2121 size = event->header.size; 2122 2123 if (size < sizeof(struct perf_event_header) || 2124 (skip = perf_session__process_event(session, event, file_pos)) < 0) { 2125 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 2126 decomp->file_pos + decomp->head, event->header.size, event->header.type); 2127 return -EINVAL; 2128 } 2129 2130 if (skip) 2131 size += skip; 2132 2133 decomp->head += size; 2134 } 2135 2136 return 0; 2137} 2138 2139/* 2140 * On 64bit we can mmap the data file in one go. No need for tiny mmap 2141 * slices. On 32bit we use 32MB. 2142 */ 2143#if BITS_PER_LONG == 64 2144#define MMAP_SIZE ULLONG_MAX 2145#define NUM_MMAPS 1 2146#else 2147#define MMAP_SIZE (32 * 1024 * 1024ULL) 2148#define NUM_MMAPS 128 2149#endif 2150 2151struct reader; 2152 2153typedef s64 (*reader_cb_t)(struct perf_session *session, 2154 union perf_event *event, 2155 u64 file_offset); 2156 2157struct reader { 2158 int fd; 2159 u64 data_size; 2160 u64 data_offset; 2161 reader_cb_t process; 2162}; 2163 2164static int 2165reader__process_events(struct reader *rd, struct perf_session *session, 2166 struct ui_progress *prog) 2167{ 2168 u64 data_size = rd->data_size; 2169 u64 head, page_offset, file_offset, file_pos, size; 2170 int err = 0, mmap_prot, mmap_flags, map_idx = 0; 2171 size_t mmap_size; 2172 char *buf, *mmaps[NUM_MMAPS]; 2173 union perf_event *event; 2174 s64 skip; 2175 2176 page_offset = page_size * (rd->data_offset / page_size); 2177 file_offset = page_offset; 2178 head = rd->data_offset - page_offset; 2179 2180 ui_progress__init_size(prog, data_size, "Processing events..."); 2181 2182 data_size += rd->data_offset; 2183 2184 mmap_size = MMAP_SIZE; 2185 if (mmap_size > data_size) { 2186 mmap_size = data_size; 2187 session->one_mmap = true; 2188 } 2189 2190 memset(mmaps, 0, sizeof(mmaps)); 2191 2192 mmap_prot = PROT_READ; 2193 mmap_flags = MAP_SHARED; 2194 2195 if (session->header.needs_swap) { 2196 mmap_prot |= PROT_WRITE; 2197 mmap_flags = MAP_PRIVATE; 2198 } 2199remap: 2200 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, rd->fd, 2201 file_offset); 2202 if (buf == MAP_FAILED) { 2203 pr_err("failed to mmap file\n"); 2204 err = -errno; 2205 goto out; 2206 } 2207 mmaps[map_idx] = buf; 2208 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 2209 file_pos = file_offset + head; 2210 if (session->one_mmap) { 2211 session->one_mmap_addr = buf; 2212 session->one_mmap_offset = file_offset; 2213 } 2214 2215more: 2216 event = fetch_mmaped_event(head, mmap_size, buf, session->header.needs_swap); 2217 if (IS_ERR(event)) 2218 return PTR_ERR(event); 2219 2220 if (!event) { 2221 if (mmaps[map_idx]) { 2222 munmap(mmaps[map_idx], mmap_size); 2223 mmaps[map_idx] = NULL; 2224 } 2225 2226 page_offset = page_size * (head / page_size); 2227 file_offset += page_offset; 2228 head -= page_offset; 2229 goto remap; 2230 } 2231 2232 size = event->header.size; 2233 2234 skip = -EINVAL; 2235 2236 if (size < sizeof(struct perf_event_header) || 2237 (skip = rd->process(session, event, file_pos)) < 0) { 2238 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n", 2239 file_offset + head, event->header.size, 2240 event->header.type, strerror(-skip)); 2241 err = skip; 2242 goto out; 2243 } 2244 2245 if (skip) 2246 size += skip; 2247 2248 head += size; 2249 file_pos += size; 2250 2251 err = __perf_session__process_decomp_events(session); 2252 if (err) 2253 goto out; 2254 2255 ui_progress__update(prog, size); 2256 2257 if (session_done()) 2258 goto out; 2259 2260 if (file_pos < data_size) 2261 goto more; 2262 2263out: 2264 return err; 2265} 2266 2267static s64 process_simple(struct perf_session *session, 2268 union perf_event *event, 2269 u64 file_offset) 2270{ 2271 return perf_session__process_event(session, event, file_offset); 2272} 2273 2274static int __perf_session__process_events(struct perf_session *session) 2275{ 2276 struct reader rd = { 2277 .fd = perf_data__fd(session->data), 2278 .data_size = session->header.data_size, 2279 .data_offset = session->header.data_offset, 2280 .process = process_simple, 2281 }; 2282 struct ordered_events *oe = &session->ordered_events; 2283 struct perf_tool *tool = session->tool; 2284 struct ui_progress prog; 2285 int err; 2286 2287 perf_tool__fill_defaults(tool); 2288 2289 if (rd.data_size == 0) 2290 return -1; 2291 2292 ui_progress__init_size(&prog, rd.data_size, "Processing events..."); 2293 2294 err = reader__process_events(&rd, session, &prog); 2295 if (err) 2296 goto out_err; 2297 /* do the final flush for ordered samples */ 2298 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 2299 if (err) 2300 goto out_err; 2301 err = auxtrace__flush_events(session, tool); 2302 if (err) 2303 goto out_err; 2304 err = perf_session__flush_thread_stacks(session); 2305out_err: 2306 ui_progress__finish(); 2307 if (!tool->no_warn) 2308 perf_session__warn_about_errors(session); 2309 /* 2310 * We may switching perf.data output, make ordered_events 2311 * reusable. 2312 */ 2313 ordered_events__reinit(&session->ordered_events); 2314 auxtrace__free_events(session); 2315 session->one_mmap = false; 2316 return err; 2317} 2318 2319int perf_session__process_events(struct perf_session *session) 2320{ 2321 if (perf_session__register_idle_thread(session) < 0) 2322 return -ENOMEM; 2323 2324 if (perf_data__is_pipe(session->data)) 2325 return __perf_session__process_pipe_events(session); 2326 2327 return __perf_session__process_events(session); 2328} 2329 2330bool perf_session__has_traces(struct perf_session *session, const char *msg) 2331{ 2332 struct evsel *evsel; 2333 2334 evlist__for_each_entry(session->evlist, evsel) { 2335 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) 2336 return true; 2337 } 2338 2339 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 2340 return false; 2341} 2342 2343int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr) 2344{ 2345 char *bracket; 2346 struct ref_reloc_sym *ref; 2347 struct kmap *kmap; 2348 2349 ref = zalloc(sizeof(struct ref_reloc_sym)); 2350 if (ref == NULL) 2351 return -ENOMEM; 2352 2353 ref->name = strdup(symbol_name); 2354 if (ref->name == NULL) { 2355 free(ref); 2356 return -ENOMEM; 2357 } 2358 2359 bracket = strchr(ref->name, ']'); 2360 if (bracket) 2361 *bracket = '\0'; 2362 2363 ref->addr = addr; 2364 2365 kmap = map__kmap(map); 2366 if (kmap) 2367 kmap->ref_reloc_sym = ref; 2368 2369 return 0; 2370} 2371 2372size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp) 2373{ 2374 return machines__fprintf_dsos(&session->machines, fp); 2375} 2376 2377size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp, 2378 bool (skip)(struct dso *dso, int parm), int parm) 2379{ 2380 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm); 2381} 2382 2383size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 2384{ 2385 size_t ret; 2386 const char *msg = ""; 2387 2388 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE)) 2389 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)"; 2390 2391 ret = fprintf(fp, "\nAggregated stats:%s\n", msg); 2392 2393 ret += events_stats__fprintf(&session->evlist->stats, fp); 2394 return ret; 2395} 2396 2397size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 2398{ 2399 /* 2400 * FIXME: Here we have to actually print all the machines in this 2401 * session, not just the host... 2402 */ 2403 return machine__fprintf(&session->machines.host, fp); 2404} 2405 2406struct evsel *perf_session__find_first_evtype(struct perf_session *session, 2407 unsigned int type) 2408{ 2409 struct evsel *pos; 2410 2411 evlist__for_each_entry(session->evlist, pos) { 2412 if (pos->core.attr.type == type) 2413 return pos; 2414 } 2415 return NULL; 2416} 2417 2418int perf_session__cpu_bitmap(struct perf_session *session, 2419 const char *cpu_list, unsigned long *cpu_bitmap) 2420{ 2421 int i, err = -1; 2422 struct perf_cpu_map *map; 2423 int nr_cpus = min(session->header.env.nr_cpus_avail, MAX_NR_CPUS); 2424 2425 for (i = 0; i < PERF_TYPE_MAX; ++i) { 2426 struct evsel *evsel; 2427 2428 evsel = perf_session__find_first_evtype(session, i); 2429 if (!evsel) 2430 continue; 2431 2432 if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CPU)) { 2433 pr_err("File does not contain CPU events. " 2434 "Remove -C option to proceed.\n"); 2435 return -1; 2436 } 2437 } 2438 2439 map = perf_cpu_map__new(cpu_list); 2440 if (map == NULL) { 2441 pr_err("Invalid cpu_list\n"); 2442 return -1; 2443 } 2444 2445 for (i = 0; i < map->nr; i++) { 2446 int cpu = map->map[i]; 2447 2448 if (cpu >= nr_cpus) { 2449 pr_err("Requested CPU %d too large. " 2450 "Consider raising MAX_NR_CPUS\n", cpu); 2451 goto out_delete_map; 2452 } 2453 2454 set_bit(cpu, cpu_bitmap); 2455 } 2456 2457 err = 0; 2458 2459out_delete_map: 2460 perf_cpu_map__put(map); 2461 return err; 2462} 2463 2464void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 2465 bool full) 2466{ 2467 if (session == NULL || fp == NULL) 2468 return; 2469 2470 fprintf(fp, "# ========\n"); 2471 perf_header__fprintf_info(session, fp, full); 2472 fprintf(fp, "# ========\n#\n"); 2473} 2474 2475int perf_event__process_id_index(struct perf_session *session, 2476 union perf_event *event) 2477{ 2478 struct evlist *evlist = session->evlist; 2479 struct perf_record_id_index *ie = &event->id_index; 2480 size_t i, nr, max_nr; 2481 2482 max_nr = (ie->header.size - sizeof(struct perf_record_id_index)) / 2483 sizeof(struct id_index_entry); 2484 nr = ie->nr; 2485 if (nr > max_nr) 2486 return -EINVAL; 2487 2488 if (dump_trace) 2489 fprintf(stdout, " nr: %zu\n", nr); 2490 2491 for (i = 0; i < nr; i++) { 2492 struct id_index_entry *e = &ie->entries[i]; 2493 struct perf_sample_id *sid; 2494 2495 if (dump_trace) { 2496 fprintf(stdout, " ... id: %"PRI_lu64, e->id); 2497 fprintf(stdout, " idx: %"PRI_lu64, e->idx); 2498 fprintf(stdout, " cpu: %"PRI_ld64, e->cpu); 2499 fprintf(stdout, " tid: %"PRI_ld64"\n", e->tid); 2500 } 2501 2502 sid = perf_evlist__id2sid(evlist, e->id); 2503 if (!sid) 2504 return -ENOENT; 2505 sid->idx = e->idx; 2506 sid->cpu = e->cpu; 2507 sid->tid = e->tid; 2508 } 2509 return 0; 2510} 2511