1 // SPDX-License-Identifier: GPL-2.0 2 #include <errno.h> 3 #include <signal.h> 4 #include <inttypes.h> 5 #include <linux/err.h> 6 #include <linux/kernel.h> 7 #include <linux/zalloc.h> 8 #include <api/fs/fs.h> 9 10 #include <byteswap.h> 11 #include <unistd.h> 12 #include <sys/types.h> 13 #include <sys/mman.h> 14 #include <perf/cpumap.h> 15 16 #include "map_symbol.h" 17 #include "branch.h" 18 #include "debug.h" 19 #include "env.h" 20 #include "evlist.h" 21 #include "evsel.h" 22 #include "memswap.h" 23 #include "map.h" 24 #include "symbol.h" 25 #include "session.h" 26 #include "tool.h" 27 #include "perf_regs.h" 28 #include "asm/bug.h" 29 #include "auxtrace.h" 30 #include "thread.h" 31 #include "thread-stack.h" 32 #include "sample-raw.h" 33 #include "stat.h" 34 #include "tsc.h" 35 #include "ui/progress.h" 36 #include "../perf.h" 37 #include "arch/common.h" 38 #include "units.h" 39 #include <internal/lib.h> 40 41 #ifdef HAVE_ZSTD_SUPPORT 42 static int perf_session__process_compressed_event(struct perf_session *session, 43 union perf_event *event, u64 file_offset, 44 const char *file_path) 45 { 46 void *src; 47 size_t decomp_size, src_size; 48 u64 decomp_last_rem = 0; 49 size_t mmap_len, decomp_len = session->header.env.comp_mmap_len; 50 struct decomp *decomp, *decomp_last = session->active_decomp->decomp_last; 51 52 if (decomp_last) { 53 decomp_last_rem = decomp_last->size - decomp_last->head; 54 decomp_len += decomp_last_rem; 55 } 56 57 mmap_len = sizeof(struct decomp) + decomp_len; 58 decomp = mmap(NULL, mmap_len, PROT_READ|PROT_WRITE, 59 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); 60 if (decomp == MAP_FAILED) { 61 pr_err("Couldn't allocate memory for decompression\n"); 62 return -1; 63 } 64 65 decomp->file_pos = file_offset; 66 decomp->file_path = file_path; 67 decomp->mmap_len = mmap_len; 68 decomp->head = 0; 69 70 if (decomp_last_rem) { 71 memcpy(decomp->data, &(decomp_last->data[decomp_last->head]), decomp_last_rem); 72 decomp->size = decomp_last_rem; 73 } 74 75 src = (void *)event + sizeof(struct perf_record_compressed); 76 src_size = event->pack.header.size - sizeof(struct perf_record_compressed); 77 78 decomp_size = zstd_decompress_stream(session->active_decomp->zstd_decomp, src, src_size, 79 &(decomp->data[decomp_last_rem]), decomp_len - decomp_last_rem); 80 if (!decomp_size) { 81 munmap(decomp, mmap_len); 82 pr_err("Couldn't decompress data\n"); 83 return -1; 84 } 85 86 decomp->size += decomp_size; 87 88 if (session->active_decomp->decomp == NULL) 89 session->active_decomp->decomp = decomp; 90 else 91 session->active_decomp->decomp_last->next = decomp; 92 93 session->active_decomp->decomp_last = decomp; 94 95 pr_debug("decomp (B): %zd to %zd\n", src_size, decomp_size); 96 97 return 0; 98 } 99 #else /* !HAVE_ZSTD_SUPPORT */ 100 #define perf_session__process_compressed_event perf_session__process_compressed_event_stub 101 #endif 102 103 static int perf_session__deliver_event(struct perf_session *session, 104 union perf_event *event, 105 struct perf_tool *tool, 106 u64 file_offset, 107 const char *file_path); 108 109 static int perf_session__open(struct perf_session *session, int repipe_fd) 110 { 111 struct perf_data *data = session->data; 112 113 if (perf_session__read_header(session, repipe_fd) < 0) { 114 pr_err("incompatible file format (rerun with -v to learn more)\n"); 115 return -1; 116 } 117 118 if (perf_data__is_pipe(data)) 119 return 0; 120 121 if (perf_header__has_feat(&session->header, HEADER_STAT)) 122 return 0; 123 124 if (!evlist__valid_sample_type(session->evlist)) { 125 pr_err("non matching sample_type\n"); 126 return -1; 127 } 128 129 if (!evlist__valid_sample_id_all(session->evlist)) { 130 pr_err("non matching sample_id_all\n"); 131 return -1; 132 } 133 134 if (!evlist__valid_read_format(session->evlist)) { 135 pr_err("non matching read_format\n"); 136 return -1; 137 } 138 139 return 0; 140 } 141 142 void perf_session__set_id_hdr_size(struct perf_session *session) 143 { 144 u16 id_hdr_size = evlist__id_hdr_size(session->evlist); 145 146 machines__set_id_hdr_size(&session->machines, id_hdr_size); 147 } 148 149 int perf_session__create_kernel_maps(struct perf_session *session) 150 { 151 int ret = machine__create_kernel_maps(&session->machines.host); 152 153 if (ret >= 0) 154 ret = machines__create_guest_kernel_maps(&session->machines); 155 return ret; 156 } 157 158 static void perf_session__destroy_kernel_maps(struct perf_session *session) 159 { 160 machines__destroy_kernel_maps(&session->machines); 161 } 162 163 static bool perf_session__has_comm_exec(struct perf_session *session) 164 { 165 struct evsel *evsel; 166 167 evlist__for_each_entry(session->evlist, evsel) { 168 if (evsel->core.attr.comm_exec) 169 return true; 170 } 171 172 return false; 173 } 174 175 static void perf_session__set_comm_exec(struct perf_session *session) 176 { 177 bool comm_exec = perf_session__has_comm_exec(session); 178 179 machines__set_comm_exec(&session->machines, comm_exec); 180 } 181 182 static int ordered_events__deliver_event(struct ordered_events *oe, 183 struct ordered_event *event) 184 { 185 struct perf_session *session = container_of(oe, struct perf_session, 186 ordered_events); 187 188 return perf_session__deliver_event(session, event->event, 189 session->tool, event->file_offset, 190 event->file_path); 191 } 192 193 struct perf_session *__perf_session__new(struct perf_data *data, 194 bool repipe, int repipe_fd, 195 struct perf_tool *tool) 196 { 197 int ret = -ENOMEM; 198 struct perf_session *session = zalloc(sizeof(*session)); 199 200 if (!session) 201 goto out; 202 203 session->repipe = repipe; 204 session->tool = tool; 205 session->decomp_data.zstd_decomp = &session->zstd_data; 206 session->active_decomp = &session->decomp_data; 207 INIT_LIST_HEAD(&session->auxtrace_index); 208 machines__init(&session->machines); 209 ordered_events__init(&session->ordered_events, 210 ordered_events__deliver_event, NULL); 211 212 perf_env__init(&session->header.env); 213 if (data) { 214 ret = perf_data__open(data); 215 if (ret < 0) 216 goto out_delete; 217 218 session->data = data; 219 220 if (perf_data__is_read(data)) { 221 ret = perf_session__open(session, repipe_fd); 222 if (ret < 0) 223 goto out_delete; 224 225 /* 226 * set session attributes that are present in perf.data 227 * but not in pipe-mode. 228 */ 229 if (!data->is_pipe) { 230 perf_session__set_id_hdr_size(session); 231 perf_session__set_comm_exec(session); 232 } 233 234 evlist__init_trace_event_sample_raw(session->evlist); 235 236 /* Open the directory data. */ 237 if (data->is_dir) { 238 ret = perf_data__open_dir(data); 239 if (ret) 240 goto out_delete; 241 } 242 243 if (!symbol_conf.kallsyms_name && 244 !symbol_conf.vmlinux_name) 245 symbol_conf.kallsyms_name = perf_data__kallsyms_name(data); 246 } 247 } else { 248 session->machines.host.env = &perf_env; 249 } 250 251 session->machines.host.single_address_space = 252 perf_env__single_address_space(session->machines.host.env); 253 254 if (!data || perf_data__is_write(data)) { 255 /* 256 * In O_RDONLY mode this will be performed when reading the 257 * kernel MMAP event, in perf_event__process_mmap(). 258 */ 259 if (perf_session__create_kernel_maps(session) < 0) 260 pr_warning("Cannot read kernel map\n"); 261 } 262 263 /* 264 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is 265 * processed, so evlist__sample_id_all is not meaningful here. 266 */ 267 if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps && 268 tool->ordered_events && !evlist__sample_id_all(session->evlist)) { 269 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); 270 tool->ordered_events = false; 271 } 272 273 return session; 274 275 out_delete: 276 perf_session__delete(session); 277 out: 278 return ERR_PTR(ret); 279 } 280 281 static void perf_session__delete_threads(struct perf_session *session) 282 { 283 machine__delete_threads(&session->machines.host); 284 } 285 286 static void perf_decomp__release_events(struct decomp *next) 287 { 288 struct decomp *decomp; 289 size_t mmap_len; 290 291 do { 292 decomp = next; 293 if (decomp == NULL) 294 break; 295 next = decomp->next; 296 mmap_len = decomp->mmap_len; 297 munmap(decomp, mmap_len); 298 } while (1); 299 } 300 301 void perf_session__delete(struct perf_session *session) 302 { 303 if (session == NULL) 304 return; 305 auxtrace__free(session); 306 auxtrace_index__free(&session->auxtrace_index); 307 perf_session__destroy_kernel_maps(session); 308 perf_session__delete_threads(session); 309 perf_decomp__release_events(session->decomp_data.decomp); 310 perf_env__exit(&session->header.env); 311 machines__exit(&session->machines); 312 if (session->data) { 313 if (perf_data__is_read(session->data)) 314 evlist__delete(session->evlist); 315 perf_data__close(session->data); 316 } 317 trace_event__cleanup(&session->tevent); 318 free(session); 319 } 320 321 static int process_event_synth_tracing_data_stub(struct perf_session *session 322 __maybe_unused, 323 union perf_event *event 324 __maybe_unused) 325 { 326 dump_printf(": unhandled!\n"); 327 return 0; 328 } 329 330 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused, 331 union perf_event *event __maybe_unused, 332 struct evlist **pevlist 333 __maybe_unused) 334 { 335 dump_printf(": unhandled!\n"); 336 return 0; 337 } 338 339 static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused, 340 union perf_event *event __maybe_unused, 341 struct evlist **pevlist 342 __maybe_unused) 343 { 344 if (dump_trace) 345 perf_event__fprintf_event_update(event, stdout); 346 347 dump_printf(": unhandled!\n"); 348 return 0; 349 } 350 351 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused, 352 union perf_event *event __maybe_unused, 353 struct perf_sample *sample __maybe_unused, 354 struct evsel *evsel __maybe_unused, 355 struct machine *machine __maybe_unused) 356 { 357 dump_printf(": unhandled!\n"); 358 return 0; 359 } 360 361 static int process_event_stub(struct perf_tool *tool __maybe_unused, 362 union perf_event *event __maybe_unused, 363 struct perf_sample *sample __maybe_unused, 364 struct machine *machine __maybe_unused) 365 { 366 dump_printf(": unhandled!\n"); 367 return 0; 368 } 369 370 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused, 371 union perf_event *event __maybe_unused, 372 struct ordered_events *oe __maybe_unused) 373 { 374 dump_printf(": unhandled!\n"); 375 return 0; 376 } 377 378 static int skipn(int fd, off_t n) 379 { 380 char buf[4096]; 381 ssize_t ret; 382 383 while (n > 0) { 384 ret = read(fd, buf, min(n, (off_t)sizeof(buf))); 385 if (ret <= 0) 386 return ret; 387 n -= ret; 388 } 389 390 return 0; 391 } 392 393 static s64 process_event_auxtrace_stub(struct perf_session *session __maybe_unused, 394 union perf_event *event) 395 { 396 dump_printf(": unhandled!\n"); 397 if (perf_data__is_pipe(session->data)) 398 skipn(perf_data__fd(session->data), event->auxtrace.size); 399 return event->auxtrace.size; 400 } 401 402 static int process_event_op2_stub(struct perf_session *session __maybe_unused, 403 union perf_event *event __maybe_unused) 404 { 405 dump_printf(": unhandled!\n"); 406 return 0; 407 } 408 409 410 static 411 int process_event_thread_map_stub(struct perf_session *session __maybe_unused, 412 union perf_event *event __maybe_unused) 413 { 414 if (dump_trace) 415 perf_event__fprintf_thread_map(event, stdout); 416 417 dump_printf(": unhandled!\n"); 418 return 0; 419 } 420 421 static 422 int process_event_cpu_map_stub(struct perf_session *session __maybe_unused, 423 union perf_event *event __maybe_unused) 424 { 425 if (dump_trace) 426 perf_event__fprintf_cpu_map(event, stdout); 427 428 dump_printf(": unhandled!\n"); 429 return 0; 430 } 431 432 static 433 int process_event_stat_config_stub(struct perf_session *session __maybe_unused, 434 union perf_event *event __maybe_unused) 435 { 436 if (dump_trace) 437 perf_event__fprintf_stat_config(event, stdout); 438 439 dump_printf(": unhandled!\n"); 440 return 0; 441 } 442 443 static int process_stat_stub(struct perf_session *perf_session __maybe_unused, 444 union perf_event *event) 445 { 446 if (dump_trace) 447 perf_event__fprintf_stat(event, stdout); 448 449 dump_printf(": unhandled!\n"); 450 return 0; 451 } 452 453 static int process_stat_round_stub(struct perf_session *perf_session __maybe_unused, 454 union perf_event *event) 455 { 456 if (dump_trace) 457 perf_event__fprintf_stat_round(event, stdout); 458 459 dump_printf(": unhandled!\n"); 460 return 0; 461 } 462 463 static int process_event_time_conv_stub(struct perf_session *perf_session __maybe_unused, 464 union perf_event *event) 465 { 466 if (dump_trace) 467 perf_event__fprintf_time_conv(event, stdout); 468 469 dump_printf(": unhandled!\n"); 470 return 0; 471 } 472 473 static int perf_session__process_compressed_event_stub(struct perf_session *session __maybe_unused, 474 union perf_event *event __maybe_unused, 475 u64 file_offset __maybe_unused, 476 const char *file_path __maybe_unused) 477 { 478 dump_printf(": unhandled!\n"); 479 return 0; 480 } 481 482 void perf_tool__fill_defaults(struct perf_tool *tool) 483 { 484 if (tool->sample == NULL) 485 tool->sample = process_event_sample_stub; 486 if (tool->mmap == NULL) 487 tool->mmap = process_event_stub; 488 if (tool->mmap2 == NULL) 489 tool->mmap2 = process_event_stub; 490 if (tool->comm == NULL) 491 tool->comm = process_event_stub; 492 if (tool->namespaces == NULL) 493 tool->namespaces = process_event_stub; 494 if (tool->cgroup == NULL) 495 tool->cgroup = process_event_stub; 496 if (tool->fork == NULL) 497 tool->fork = process_event_stub; 498 if (tool->exit == NULL) 499 tool->exit = process_event_stub; 500 if (tool->lost == NULL) 501 tool->lost = perf_event__process_lost; 502 if (tool->lost_samples == NULL) 503 tool->lost_samples = perf_event__process_lost_samples; 504 if (tool->aux == NULL) 505 tool->aux = perf_event__process_aux; 506 if (tool->itrace_start == NULL) 507 tool->itrace_start = perf_event__process_itrace_start; 508 if (tool->context_switch == NULL) 509 tool->context_switch = perf_event__process_switch; 510 if (tool->ksymbol == NULL) 511 tool->ksymbol = perf_event__process_ksymbol; 512 if (tool->bpf == NULL) 513 tool->bpf = perf_event__process_bpf; 514 if (tool->text_poke == NULL) 515 tool->text_poke = perf_event__process_text_poke; 516 if (tool->aux_output_hw_id == NULL) 517 tool->aux_output_hw_id = perf_event__process_aux_output_hw_id; 518 if (tool->read == NULL) 519 tool->read = process_event_sample_stub; 520 if (tool->throttle == NULL) 521 tool->throttle = process_event_stub; 522 if (tool->unthrottle == NULL) 523 tool->unthrottle = process_event_stub; 524 if (tool->attr == NULL) 525 tool->attr = process_event_synth_attr_stub; 526 if (tool->event_update == NULL) 527 tool->event_update = process_event_synth_event_update_stub; 528 if (tool->tracing_data == NULL) 529 tool->tracing_data = process_event_synth_tracing_data_stub; 530 if (tool->build_id == NULL) 531 tool->build_id = process_event_op2_stub; 532 if (tool->finished_round == NULL) { 533 if (tool->ordered_events) 534 tool->finished_round = perf_event__process_finished_round; 535 else 536 tool->finished_round = process_finished_round_stub; 537 } 538 if (tool->id_index == NULL) 539 tool->id_index = process_event_op2_stub; 540 if (tool->auxtrace_info == NULL) 541 tool->auxtrace_info = process_event_op2_stub; 542 if (tool->auxtrace == NULL) 543 tool->auxtrace = process_event_auxtrace_stub; 544 if (tool->auxtrace_error == NULL) 545 tool->auxtrace_error = process_event_op2_stub; 546 if (tool->thread_map == NULL) 547 tool->thread_map = process_event_thread_map_stub; 548 if (tool->cpu_map == NULL) 549 tool->cpu_map = process_event_cpu_map_stub; 550 if (tool->stat_config == NULL) 551 tool->stat_config = process_event_stat_config_stub; 552 if (tool->stat == NULL) 553 tool->stat = process_stat_stub; 554 if (tool->stat_round == NULL) 555 tool->stat_round = process_stat_round_stub; 556 if (tool->time_conv == NULL) 557 tool->time_conv = process_event_time_conv_stub; 558 if (tool->feature == NULL) 559 tool->feature = process_event_op2_stub; 560 if (tool->compressed == NULL) 561 tool->compressed = perf_session__process_compressed_event; 562 if (tool->finished_init == NULL) 563 tool->finished_init = process_event_op2_stub; 564 } 565 566 static void swap_sample_id_all(union perf_event *event, void *data) 567 { 568 void *end = (void *) event + event->header.size; 569 int size = end - data; 570 571 BUG_ON(size % sizeof(u64)); 572 mem_bswap_64(data, size); 573 } 574 575 static void perf_event__all64_swap(union perf_event *event, 576 bool sample_id_all __maybe_unused) 577 { 578 struct perf_event_header *hdr = &event->header; 579 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 580 } 581 582 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 583 { 584 event->comm.pid = bswap_32(event->comm.pid); 585 event->comm.tid = bswap_32(event->comm.tid); 586 587 if (sample_id_all) { 588 void *data = &event->comm.comm; 589 590 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 591 swap_sample_id_all(event, data); 592 } 593 } 594 595 static void perf_event__mmap_swap(union perf_event *event, 596 bool sample_id_all) 597 { 598 event->mmap.pid = bswap_32(event->mmap.pid); 599 event->mmap.tid = bswap_32(event->mmap.tid); 600 event->mmap.start = bswap_64(event->mmap.start); 601 event->mmap.len = bswap_64(event->mmap.len); 602 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 603 604 if (sample_id_all) { 605 void *data = &event->mmap.filename; 606 607 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 608 swap_sample_id_all(event, data); 609 } 610 } 611 612 static void perf_event__mmap2_swap(union perf_event *event, 613 bool sample_id_all) 614 { 615 event->mmap2.pid = bswap_32(event->mmap2.pid); 616 event->mmap2.tid = bswap_32(event->mmap2.tid); 617 event->mmap2.start = bswap_64(event->mmap2.start); 618 event->mmap2.len = bswap_64(event->mmap2.len); 619 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); 620 621 if (!(event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID)) { 622 event->mmap2.maj = bswap_32(event->mmap2.maj); 623 event->mmap2.min = bswap_32(event->mmap2.min); 624 event->mmap2.ino = bswap_64(event->mmap2.ino); 625 event->mmap2.ino_generation = bswap_64(event->mmap2.ino_generation); 626 } 627 628 if (sample_id_all) { 629 void *data = &event->mmap2.filename; 630 631 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 632 swap_sample_id_all(event, data); 633 } 634 } 635 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 636 { 637 event->fork.pid = bswap_32(event->fork.pid); 638 event->fork.tid = bswap_32(event->fork.tid); 639 event->fork.ppid = bswap_32(event->fork.ppid); 640 event->fork.ptid = bswap_32(event->fork.ptid); 641 event->fork.time = bswap_64(event->fork.time); 642 643 if (sample_id_all) 644 swap_sample_id_all(event, &event->fork + 1); 645 } 646 647 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 648 { 649 event->read.pid = bswap_32(event->read.pid); 650 event->read.tid = bswap_32(event->read.tid); 651 event->read.value = bswap_64(event->read.value); 652 event->read.time_enabled = bswap_64(event->read.time_enabled); 653 event->read.time_running = bswap_64(event->read.time_running); 654 event->read.id = bswap_64(event->read.id); 655 656 if (sample_id_all) 657 swap_sample_id_all(event, &event->read + 1); 658 } 659 660 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all) 661 { 662 event->aux.aux_offset = bswap_64(event->aux.aux_offset); 663 event->aux.aux_size = bswap_64(event->aux.aux_size); 664 event->aux.flags = bswap_64(event->aux.flags); 665 666 if (sample_id_all) 667 swap_sample_id_all(event, &event->aux + 1); 668 } 669 670 static void perf_event__itrace_start_swap(union perf_event *event, 671 bool sample_id_all) 672 { 673 event->itrace_start.pid = bswap_32(event->itrace_start.pid); 674 event->itrace_start.tid = bswap_32(event->itrace_start.tid); 675 676 if (sample_id_all) 677 swap_sample_id_all(event, &event->itrace_start + 1); 678 } 679 680 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all) 681 { 682 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) { 683 event->context_switch.next_prev_pid = 684 bswap_32(event->context_switch.next_prev_pid); 685 event->context_switch.next_prev_tid = 686 bswap_32(event->context_switch.next_prev_tid); 687 } 688 689 if (sample_id_all) 690 swap_sample_id_all(event, &event->context_switch + 1); 691 } 692 693 static void perf_event__text_poke_swap(union perf_event *event, bool sample_id_all) 694 { 695 event->text_poke.addr = bswap_64(event->text_poke.addr); 696 event->text_poke.old_len = bswap_16(event->text_poke.old_len); 697 event->text_poke.new_len = bswap_16(event->text_poke.new_len); 698 699 if (sample_id_all) { 700 size_t len = sizeof(event->text_poke.old_len) + 701 sizeof(event->text_poke.new_len) + 702 event->text_poke.old_len + 703 event->text_poke.new_len; 704 void *data = &event->text_poke.old_len; 705 706 data += PERF_ALIGN(len, sizeof(u64)); 707 swap_sample_id_all(event, data); 708 } 709 } 710 711 static void perf_event__throttle_swap(union perf_event *event, 712 bool sample_id_all) 713 { 714 event->throttle.time = bswap_64(event->throttle.time); 715 event->throttle.id = bswap_64(event->throttle.id); 716 event->throttle.stream_id = bswap_64(event->throttle.stream_id); 717 718 if (sample_id_all) 719 swap_sample_id_all(event, &event->throttle + 1); 720 } 721 722 static void perf_event__namespaces_swap(union perf_event *event, 723 bool sample_id_all) 724 { 725 u64 i; 726 727 event->namespaces.pid = bswap_32(event->namespaces.pid); 728 event->namespaces.tid = bswap_32(event->namespaces.tid); 729 event->namespaces.nr_namespaces = bswap_64(event->namespaces.nr_namespaces); 730 731 for (i = 0; i < event->namespaces.nr_namespaces; i++) { 732 struct perf_ns_link_info *ns = &event->namespaces.link_info[i]; 733 734 ns->dev = bswap_64(ns->dev); 735 ns->ino = bswap_64(ns->ino); 736 } 737 738 if (sample_id_all) 739 swap_sample_id_all(event, &event->namespaces.link_info[i]); 740 } 741 742 static void perf_event__cgroup_swap(union perf_event *event, bool sample_id_all) 743 { 744 event->cgroup.id = bswap_64(event->cgroup.id); 745 746 if (sample_id_all) { 747 void *data = &event->cgroup.path; 748 749 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 750 swap_sample_id_all(event, data); 751 } 752 } 753 754 static u8 revbyte(u8 b) 755 { 756 int rev = (b >> 4) | ((b & 0xf) << 4); 757 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 758 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 759 return (u8) rev; 760 } 761 762 /* 763 * XXX this is hack in attempt to carry flags bitfield 764 * through endian village. ABI says: 765 * 766 * Bit-fields are allocated from right to left (least to most significant) 767 * on little-endian implementations and from left to right (most to least 768 * significant) on big-endian implementations. 769 * 770 * The above seems to be byte specific, so we need to reverse each 771 * byte of the bitfield. 'Internet' also says this might be implementation 772 * specific and we probably need proper fix and carry perf_event_attr 773 * bitfield flags in separate data file FEAT_ section. Thought this seems 774 * to work for now. 775 */ 776 static void swap_bitfield(u8 *p, unsigned len) 777 { 778 unsigned i; 779 780 for (i = 0; i < len; i++) { 781 *p = revbyte(*p); 782 p++; 783 } 784 } 785 786 /* exported for swapping attributes in file header */ 787 void perf_event__attr_swap(struct perf_event_attr *attr) 788 { 789 attr->type = bswap_32(attr->type); 790 attr->size = bswap_32(attr->size); 791 792 #define bswap_safe(f, n) \ 793 (attr->size > (offsetof(struct perf_event_attr, f) + \ 794 sizeof(attr->f) * (n))) 795 #define bswap_field(f, sz) \ 796 do { \ 797 if (bswap_safe(f, 0)) \ 798 attr->f = bswap_##sz(attr->f); \ 799 } while(0) 800 #define bswap_field_16(f) bswap_field(f, 16) 801 #define bswap_field_32(f) bswap_field(f, 32) 802 #define bswap_field_64(f) bswap_field(f, 64) 803 804 bswap_field_64(config); 805 bswap_field_64(sample_period); 806 bswap_field_64(sample_type); 807 bswap_field_64(read_format); 808 bswap_field_32(wakeup_events); 809 bswap_field_32(bp_type); 810 bswap_field_64(bp_addr); 811 bswap_field_64(bp_len); 812 bswap_field_64(branch_sample_type); 813 bswap_field_64(sample_regs_user); 814 bswap_field_32(sample_stack_user); 815 bswap_field_32(aux_watermark); 816 bswap_field_16(sample_max_stack); 817 bswap_field_32(aux_sample_size); 818 819 /* 820 * After read_format are bitfields. Check read_format because 821 * we are unable to use offsetof on bitfield. 822 */ 823 if (bswap_safe(read_format, 1)) 824 swap_bitfield((u8 *) (&attr->read_format + 1), 825 sizeof(u64)); 826 #undef bswap_field_64 827 #undef bswap_field_32 828 #undef bswap_field 829 #undef bswap_safe 830 } 831 832 static void perf_event__hdr_attr_swap(union perf_event *event, 833 bool sample_id_all __maybe_unused) 834 { 835 size_t size; 836 837 perf_event__attr_swap(&event->attr.attr); 838 839 size = event->header.size; 840 size -= (void *)&event->attr.id - (void *)event; 841 mem_bswap_64(event->attr.id, size); 842 } 843 844 static void perf_event__event_update_swap(union perf_event *event, 845 bool sample_id_all __maybe_unused) 846 { 847 event->event_update.type = bswap_64(event->event_update.type); 848 event->event_update.id = bswap_64(event->event_update.id); 849 } 850 851 static void perf_event__event_type_swap(union perf_event *event, 852 bool sample_id_all __maybe_unused) 853 { 854 event->event_type.event_type.event_id = 855 bswap_64(event->event_type.event_type.event_id); 856 } 857 858 static void perf_event__tracing_data_swap(union perf_event *event, 859 bool sample_id_all __maybe_unused) 860 { 861 event->tracing_data.size = bswap_32(event->tracing_data.size); 862 } 863 864 static void perf_event__auxtrace_info_swap(union perf_event *event, 865 bool sample_id_all __maybe_unused) 866 { 867 size_t size; 868 869 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type); 870 871 size = event->header.size; 872 size -= (void *)&event->auxtrace_info.priv - (void *)event; 873 mem_bswap_64(event->auxtrace_info.priv, size); 874 } 875 876 static void perf_event__auxtrace_swap(union perf_event *event, 877 bool sample_id_all __maybe_unused) 878 { 879 event->auxtrace.size = bswap_64(event->auxtrace.size); 880 event->auxtrace.offset = bswap_64(event->auxtrace.offset); 881 event->auxtrace.reference = bswap_64(event->auxtrace.reference); 882 event->auxtrace.idx = bswap_32(event->auxtrace.idx); 883 event->auxtrace.tid = bswap_32(event->auxtrace.tid); 884 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu); 885 } 886 887 static void perf_event__auxtrace_error_swap(union perf_event *event, 888 bool sample_id_all __maybe_unused) 889 { 890 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type); 891 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code); 892 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu); 893 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid); 894 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid); 895 event->auxtrace_error.fmt = bswap_32(event->auxtrace_error.fmt); 896 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip); 897 if (event->auxtrace_error.fmt) 898 event->auxtrace_error.time = bswap_64(event->auxtrace_error.time); 899 if (event->auxtrace_error.fmt >= 2) { 900 event->auxtrace_error.machine_pid = bswap_32(event->auxtrace_error.machine_pid); 901 event->auxtrace_error.vcpu = bswap_32(event->auxtrace_error.vcpu); 902 } 903 } 904 905 static void perf_event__thread_map_swap(union perf_event *event, 906 bool sample_id_all __maybe_unused) 907 { 908 unsigned i; 909 910 event->thread_map.nr = bswap_64(event->thread_map.nr); 911 912 for (i = 0; i < event->thread_map.nr; i++) 913 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid); 914 } 915 916 static void perf_event__cpu_map_swap(union perf_event *event, 917 bool sample_id_all __maybe_unused) 918 { 919 struct perf_record_cpu_map_data *data = &event->cpu_map.data; 920 921 data->type = bswap_16(data->type); 922 923 switch (data->type) { 924 case PERF_CPU_MAP__CPUS: 925 data->cpus_data.nr = bswap_16(data->cpus_data.nr); 926 927 for (unsigned i = 0; i < data->cpus_data.nr; i++) 928 data->cpus_data.cpu[i] = bswap_16(data->cpus_data.cpu[i]); 929 break; 930 case PERF_CPU_MAP__MASK: 931 data->mask32_data.long_size = bswap_16(data->mask32_data.long_size); 932 933 switch (data->mask32_data.long_size) { 934 case 4: 935 data->mask32_data.nr = bswap_16(data->mask32_data.nr); 936 for (unsigned i = 0; i < data->mask32_data.nr; i++) 937 data->mask32_data.mask[i] = bswap_32(data->mask32_data.mask[i]); 938 break; 939 case 8: 940 data->mask64_data.nr = bswap_16(data->mask64_data.nr); 941 for (unsigned i = 0; i < data->mask64_data.nr; i++) 942 data->mask64_data.mask[i] = bswap_64(data->mask64_data.mask[i]); 943 break; 944 default: 945 pr_err("cpu_map swap: unsupported long size\n"); 946 } 947 break; 948 case PERF_CPU_MAP__RANGE_CPUS: 949 data->range_cpu_data.start_cpu = bswap_16(data->range_cpu_data.start_cpu); 950 data->range_cpu_data.end_cpu = bswap_16(data->range_cpu_data.end_cpu); 951 break; 952 default: 953 break; 954 } 955 } 956 957 static void perf_event__stat_config_swap(union perf_event *event, 958 bool sample_id_all __maybe_unused) 959 { 960 u64 size; 961 962 size = bswap_64(event->stat_config.nr) * sizeof(event->stat_config.data[0]); 963 size += 1; /* nr item itself */ 964 mem_bswap_64(&event->stat_config.nr, size); 965 } 966 967 static void perf_event__stat_swap(union perf_event *event, 968 bool sample_id_all __maybe_unused) 969 { 970 event->stat.id = bswap_64(event->stat.id); 971 event->stat.thread = bswap_32(event->stat.thread); 972 event->stat.cpu = bswap_32(event->stat.cpu); 973 event->stat.val = bswap_64(event->stat.val); 974 event->stat.ena = bswap_64(event->stat.ena); 975 event->stat.run = bswap_64(event->stat.run); 976 } 977 978 static void perf_event__stat_round_swap(union perf_event *event, 979 bool sample_id_all __maybe_unused) 980 { 981 event->stat_round.type = bswap_64(event->stat_round.type); 982 event->stat_round.time = bswap_64(event->stat_round.time); 983 } 984 985 static void perf_event__time_conv_swap(union perf_event *event, 986 bool sample_id_all __maybe_unused) 987 { 988 event->time_conv.time_shift = bswap_64(event->time_conv.time_shift); 989 event->time_conv.time_mult = bswap_64(event->time_conv.time_mult); 990 event->time_conv.time_zero = bswap_64(event->time_conv.time_zero); 991 992 if (event_contains(event->time_conv, time_cycles)) { 993 event->time_conv.time_cycles = bswap_64(event->time_conv.time_cycles); 994 event->time_conv.time_mask = bswap_64(event->time_conv.time_mask); 995 } 996 } 997 998 typedef void (*perf_event__swap_op)(union perf_event *event, 999 bool sample_id_all); 1000 1001 static perf_event__swap_op perf_event__swap_ops[] = { 1002 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 1003 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap, 1004 [PERF_RECORD_COMM] = perf_event__comm_swap, 1005 [PERF_RECORD_FORK] = perf_event__task_swap, 1006 [PERF_RECORD_EXIT] = perf_event__task_swap, 1007 [PERF_RECORD_LOST] = perf_event__all64_swap, 1008 [PERF_RECORD_READ] = perf_event__read_swap, 1009 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap, 1010 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap, 1011 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 1012 [PERF_RECORD_AUX] = perf_event__aux_swap, 1013 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap, 1014 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap, 1015 [PERF_RECORD_SWITCH] = perf_event__switch_swap, 1016 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap, 1017 [PERF_RECORD_NAMESPACES] = perf_event__namespaces_swap, 1018 [PERF_RECORD_CGROUP] = perf_event__cgroup_swap, 1019 [PERF_RECORD_TEXT_POKE] = perf_event__text_poke_swap, 1020 [PERF_RECORD_AUX_OUTPUT_HW_ID] = perf_event__all64_swap, 1021 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 1022 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 1023 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 1024 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 1025 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap, 1026 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap, 1027 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap, 1028 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap, 1029 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap, 1030 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap, 1031 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap, 1032 [PERF_RECORD_STAT] = perf_event__stat_swap, 1033 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap, 1034 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap, 1035 [PERF_RECORD_TIME_CONV] = perf_event__time_conv_swap, 1036 [PERF_RECORD_HEADER_MAX] = NULL, 1037 }; 1038 1039 /* 1040 * When perf record finishes a pass on every buffers, it records this pseudo 1041 * event. 1042 * We record the max timestamp t found in the pass n. 1043 * Assuming these timestamps are monotonic across cpus, we know that if 1044 * a buffer still has events with timestamps below t, they will be all 1045 * available and then read in the pass n + 1. 1046 * Hence when we start to read the pass n + 2, we can safely flush every 1047 * events with timestamps below t. 1048 * 1049 * ============ PASS n ================= 1050 * CPU 0 | CPU 1 1051 * | 1052 * cnt1 timestamps | cnt2 timestamps 1053 * 1 | 2 1054 * 2 | 3 1055 * - | 4 <--- max recorded 1056 * 1057 * ============ PASS n + 1 ============== 1058 * CPU 0 | CPU 1 1059 * | 1060 * cnt1 timestamps | cnt2 timestamps 1061 * 3 | 5 1062 * 4 | 6 1063 * 5 | 7 <---- max recorded 1064 * 1065 * Flush every events below timestamp 4 1066 * 1067 * ============ PASS n + 2 ============== 1068 * CPU 0 | CPU 1 1069 * | 1070 * cnt1 timestamps | cnt2 timestamps 1071 * 6 | 8 1072 * 7 | 9 1073 * - | 10 1074 * 1075 * Flush every events below timestamp 7 1076 * etc... 1077 */ 1078 int perf_event__process_finished_round(struct perf_tool *tool __maybe_unused, 1079 union perf_event *event __maybe_unused, 1080 struct ordered_events *oe) 1081 { 1082 if (dump_trace) 1083 fprintf(stdout, "\n"); 1084 return ordered_events__flush(oe, OE_FLUSH__ROUND); 1085 } 1086 1087 int perf_session__queue_event(struct perf_session *s, union perf_event *event, 1088 u64 timestamp, u64 file_offset, const char *file_path) 1089 { 1090 return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset, file_path); 1091 } 1092 1093 static void callchain__lbr_callstack_printf(struct perf_sample *sample) 1094 { 1095 struct ip_callchain *callchain = sample->callchain; 1096 struct branch_stack *lbr_stack = sample->branch_stack; 1097 struct branch_entry *entries = perf_sample__branch_entries(sample); 1098 u64 kernel_callchain_nr = callchain->nr; 1099 unsigned int i; 1100 1101 for (i = 0; i < kernel_callchain_nr; i++) { 1102 if (callchain->ips[i] == PERF_CONTEXT_USER) 1103 break; 1104 } 1105 1106 if ((i != kernel_callchain_nr) && lbr_stack->nr) { 1107 u64 total_nr; 1108 /* 1109 * LBR callstack can only get user call chain, 1110 * i is kernel call chain number, 1111 * 1 is PERF_CONTEXT_USER. 1112 * 1113 * The user call chain is stored in LBR registers. 1114 * LBR are pair registers. The caller is stored 1115 * in "from" register, while the callee is stored 1116 * in "to" register. 1117 * For example, there is a call stack 1118 * "A"->"B"->"C"->"D". 1119 * The LBR registers will be recorded like 1120 * "C"->"D", "B"->"C", "A"->"B". 1121 * So only the first "to" register and all "from" 1122 * registers are needed to construct the whole stack. 1123 */ 1124 total_nr = i + 1 + lbr_stack->nr + 1; 1125 kernel_callchain_nr = i + 1; 1126 1127 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr); 1128 1129 for (i = 0; i < kernel_callchain_nr; i++) 1130 printf("..... %2d: %016" PRIx64 "\n", 1131 i, callchain->ips[i]); 1132 1133 printf("..... %2d: %016" PRIx64 "\n", 1134 (int)(kernel_callchain_nr), entries[0].to); 1135 for (i = 0; i < lbr_stack->nr; i++) 1136 printf("..... %2d: %016" PRIx64 "\n", 1137 (int)(i + kernel_callchain_nr + 1), entries[i].from); 1138 } 1139 } 1140 1141 static void callchain__printf(struct evsel *evsel, 1142 struct perf_sample *sample) 1143 { 1144 unsigned int i; 1145 struct ip_callchain *callchain = sample->callchain; 1146 1147 if (evsel__has_branch_callstack(evsel)) 1148 callchain__lbr_callstack_printf(sample); 1149 1150 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr); 1151 1152 for (i = 0; i < callchain->nr; i++) 1153 printf("..... %2d: %016" PRIx64 "\n", 1154 i, callchain->ips[i]); 1155 } 1156 1157 static void branch_stack__printf(struct perf_sample *sample, bool callstack) 1158 { 1159 struct branch_entry *entries = perf_sample__branch_entries(sample); 1160 uint64_t i; 1161 1162 if (!callstack) { 1163 printf("%s: nr:%" PRIu64 "\n", "... branch stack", sample->branch_stack->nr); 1164 } else { 1165 /* the reason of adding 1 to nr is because after expanding 1166 * branch stack it generates nr + 1 callstack records. e.g., 1167 * B()->C() 1168 * A()->B() 1169 * the final callstack should be: 1170 * C() 1171 * B() 1172 * A() 1173 */ 1174 printf("%s: nr:%" PRIu64 "\n", "... branch callstack", sample->branch_stack->nr+1); 1175 } 1176 1177 for (i = 0; i < sample->branch_stack->nr; i++) { 1178 struct branch_entry *e = &entries[i]; 1179 1180 if (!callstack) { 1181 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x %s\n", 1182 i, e->from, e->to, 1183 (unsigned short)e->flags.cycles, 1184 e->flags.mispred ? "M" : " ", 1185 e->flags.predicted ? "P" : " ", 1186 e->flags.abort ? "A" : " ", 1187 e->flags.in_tx ? "T" : " ", 1188 (unsigned)e->flags.reserved, 1189 get_branch_type(e)); 1190 } else { 1191 if (i == 0) { 1192 printf("..... %2"PRIu64": %016" PRIx64 "\n" 1193 "..... %2"PRIu64": %016" PRIx64 "\n", 1194 i, e->to, i+1, e->from); 1195 } else { 1196 printf("..... %2"PRIu64": %016" PRIx64 "\n", i+1, e->from); 1197 } 1198 } 1199 } 1200 } 1201 1202 static void regs_dump__printf(u64 mask, u64 *regs, const char *arch) 1203 { 1204 unsigned rid, i = 0; 1205 1206 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { 1207 u64 val = regs[i++]; 1208 1209 printf(".... %-5s 0x%016" PRIx64 "\n", 1210 perf_reg_name(rid, arch), val); 1211 } 1212 } 1213 1214 static const char *regs_abi[] = { 1215 [PERF_SAMPLE_REGS_ABI_NONE] = "none", 1216 [PERF_SAMPLE_REGS_ABI_32] = "32-bit", 1217 [PERF_SAMPLE_REGS_ABI_64] = "64-bit", 1218 }; 1219 1220 static inline const char *regs_dump_abi(struct regs_dump *d) 1221 { 1222 if (d->abi > PERF_SAMPLE_REGS_ABI_64) 1223 return "unknown"; 1224 1225 return regs_abi[d->abi]; 1226 } 1227 1228 static void regs__printf(const char *type, struct regs_dump *regs, const char *arch) 1229 { 1230 u64 mask = regs->mask; 1231 1232 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n", 1233 type, 1234 mask, 1235 regs_dump_abi(regs)); 1236 1237 regs_dump__printf(mask, regs->regs, arch); 1238 } 1239 1240 static void regs_user__printf(struct perf_sample *sample, const char *arch) 1241 { 1242 struct regs_dump *user_regs = &sample->user_regs; 1243 1244 if (user_regs->regs) 1245 regs__printf("user", user_regs, arch); 1246 } 1247 1248 static void regs_intr__printf(struct perf_sample *sample, const char *arch) 1249 { 1250 struct regs_dump *intr_regs = &sample->intr_regs; 1251 1252 if (intr_regs->regs) 1253 regs__printf("intr", intr_regs, arch); 1254 } 1255 1256 static void stack_user__printf(struct stack_dump *dump) 1257 { 1258 printf("... ustack: size %" PRIu64 ", offset 0x%x\n", 1259 dump->size, dump->offset); 1260 } 1261 1262 static void evlist__print_tstamp(struct evlist *evlist, union perf_event *event, struct perf_sample *sample) 1263 { 1264 u64 sample_type = __evlist__combined_sample_type(evlist); 1265 1266 if (event->header.type != PERF_RECORD_SAMPLE && 1267 !evlist__sample_id_all(evlist)) { 1268 fputs("-1 -1 ", stdout); 1269 return; 1270 } 1271 1272 if ((sample_type & PERF_SAMPLE_CPU)) 1273 printf("%u ", sample->cpu); 1274 1275 if (sample_type & PERF_SAMPLE_TIME) 1276 printf("%" PRIu64 " ", sample->time); 1277 } 1278 1279 static void sample_read__printf(struct perf_sample *sample, u64 read_format) 1280 { 1281 printf("... sample_read:\n"); 1282 1283 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1284 printf("...... time enabled %016" PRIx64 "\n", 1285 sample->read.time_enabled); 1286 1287 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1288 printf("...... time running %016" PRIx64 "\n", 1289 sample->read.time_running); 1290 1291 if (read_format & PERF_FORMAT_GROUP) { 1292 struct sample_read_value *value = sample->read.group.values; 1293 1294 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr); 1295 1296 sample_read_group__for_each(value, sample->read.group.nr, read_format) { 1297 printf("..... id %016" PRIx64 1298 ", value %016" PRIx64, 1299 value->id, value->value); 1300 if (read_format & PERF_FORMAT_LOST) 1301 printf(", lost %" PRIu64, value->lost); 1302 printf("\n"); 1303 } 1304 } else { 1305 printf("..... id %016" PRIx64 ", value %016" PRIx64, 1306 sample->read.one.id, sample->read.one.value); 1307 if (read_format & PERF_FORMAT_LOST) 1308 printf(", lost %" PRIu64, sample->read.one.lost); 1309 printf("\n"); 1310 } 1311 } 1312 1313 static void dump_event(struct evlist *evlist, union perf_event *event, 1314 u64 file_offset, struct perf_sample *sample, 1315 const char *file_path) 1316 { 1317 if (!dump_trace) 1318 return; 1319 1320 printf("\n%#" PRIx64 "@%s [%#x]: event: %d\n", 1321 file_offset, file_path, event->header.size, event->header.type); 1322 1323 trace_event(event); 1324 if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw) 1325 evlist->trace_event_sample_raw(evlist, event, sample); 1326 1327 if (sample) 1328 evlist__print_tstamp(evlist, event, sample); 1329 1330 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 1331 event->header.size, perf_event__name(event->header.type)); 1332 } 1333 1334 char *get_page_size_name(u64 size, char *str) 1335 { 1336 if (!size || !unit_number__scnprintf(str, PAGE_SIZE_NAME_LEN, size)) 1337 snprintf(str, PAGE_SIZE_NAME_LEN, "%s", "N/A"); 1338 1339 return str; 1340 } 1341 1342 static void dump_sample(struct evsel *evsel, union perf_event *event, 1343 struct perf_sample *sample, const char *arch) 1344 { 1345 u64 sample_type; 1346 char str[PAGE_SIZE_NAME_LEN]; 1347 1348 if (!dump_trace) 1349 return; 1350 1351 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 1352 event->header.misc, sample->pid, sample->tid, sample->ip, 1353 sample->period, sample->addr); 1354 1355 sample_type = evsel->core.attr.sample_type; 1356 1357 if (evsel__has_callchain(evsel)) 1358 callchain__printf(evsel, sample); 1359 1360 if (evsel__has_br_stack(evsel)) 1361 branch_stack__printf(sample, evsel__has_branch_callstack(evsel)); 1362 1363 if (sample_type & PERF_SAMPLE_REGS_USER) 1364 regs_user__printf(sample, arch); 1365 1366 if (sample_type & PERF_SAMPLE_REGS_INTR) 1367 regs_intr__printf(sample, arch); 1368 1369 if (sample_type & PERF_SAMPLE_STACK_USER) 1370 stack_user__printf(&sample->user_stack); 1371 1372 if (sample_type & PERF_SAMPLE_WEIGHT_TYPE) { 1373 printf("... weight: %" PRIu64 "", sample->weight); 1374 if (sample_type & PERF_SAMPLE_WEIGHT_STRUCT) { 1375 printf(",0x%"PRIx16"", sample->ins_lat); 1376 printf(",0x%"PRIx16"", sample->p_stage_cyc); 1377 } 1378 printf("\n"); 1379 } 1380 1381 if (sample_type & PERF_SAMPLE_DATA_SRC) 1382 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src); 1383 1384 if (sample_type & PERF_SAMPLE_PHYS_ADDR) 1385 printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr); 1386 1387 if (sample_type & PERF_SAMPLE_DATA_PAGE_SIZE) 1388 printf(" .. data page size: %s\n", get_page_size_name(sample->data_page_size, str)); 1389 1390 if (sample_type & PERF_SAMPLE_CODE_PAGE_SIZE) 1391 printf(" .. code page size: %s\n", get_page_size_name(sample->code_page_size, str)); 1392 1393 if (sample_type & PERF_SAMPLE_TRANSACTION) 1394 printf("... transaction: %" PRIx64 "\n", sample->transaction); 1395 1396 if (sample_type & PERF_SAMPLE_READ) 1397 sample_read__printf(sample, evsel->core.attr.read_format); 1398 } 1399 1400 static void dump_read(struct evsel *evsel, union perf_event *event) 1401 { 1402 struct perf_record_read *read_event = &event->read; 1403 u64 read_format; 1404 1405 if (!dump_trace) 1406 return; 1407 1408 printf(": %d %d %s %" PRI_lu64 "\n", event->read.pid, event->read.tid, 1409 evsel__name(evsel), event->read.value); 1410 1411 if (!evsel) 1412 return; 1413 1414 read_format = evsel->core.attr.read_format; 1415 1416 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1417 printf("... time enabled : %" PRI_lu64 "\n", read_event->time_enabled); 1418 1419 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1420 printf("... time running : %" PRI_lu64 "\n", read_event->time_running); 1421 1422 if (read_format & PERF_FORMAT_ID) 1423 printf("... id : %" PRI_lu64 "\n", read_event->id); 1424 1425 if (read_format & PERF_FORMAT_LOST) 1426 printf("... lost : %" PRI_lu64 "\n", read_event->lost); 1427 } 1428 1429 static struct machine *machines__find_for_cpumode(struct machines *machines, 1430 union perf_event *event, 1431 struct perf_sample *sample) 1432 { 1433 if (perf_guest && 1434 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 1435 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) { 1436 u32 pid; 1437 1438 if (sample->machine_pid) 1439 pid = sample->machine_pid; 1440 else if (event->header.type == PERF_RECORD_MMAP 1441 || event->header.type == PERF_RECORD_MMAP2) 1442 pid = event->mmap.pid; 1443 else 1444 pid = sample->pid; 1445 1446 /* 1447 * Guest code machine is created as needed and does not use 1448 * DEFAULT_GUEST_KERNEL_ID. 1449 */ 1450 if (symbol_conf.guest_code) 1451 return machines__findnew(machines, pid); 1452 1453 return machines__find_guest(machines, pid); 1454 } 1455 1456 return &machines->host; 1457 } 1458 1459 static int deliver_sample_value(struct evlist *evlist, 1460 struct perf_tool *tool, 1461 union perf_event *event, 1462 struct perf_sample *sample, 1463 struct sample_read_value *v, 1464 struct machine *machine) 1465 { 1466 struct perf_sample_id *sid = evlist__id2sid(evlist, v->id); 1467 struct evsel *evsel; 1468 1469 if (sid) { 1470 sample->id = v->id; 1471 sample->period = v->value - sid->period; 1472 sid->period = v->value; 1473 } 1474 1475 if (!sid || sid->evsel == NULL) { 1476 ++evlist->stats.nr_unknown_id; 1477 return 0; 1478 } 1479 1480 /* 1481 * There's no reason to deliver sample 1482 * for zero period, bail out. 1483 */ 1484 if (!sample->period) 1485 return 0; 1486 1487 evsel = container_of(sid->evsel, struct evsel, core); 1488 return tool->sample(tool, event, sample, evsel, machine); 1489 } 1490 1491 static int deliver_sample_group(struct evlist *evlist, 1492 struct perf_tool *tool, 1493 union perf_event *event, 1494 struct perf_sample *sample, 1495 struct machine *machine, 1496 u64 read_format) 1497 { 1498 int ret = -EINVAL; 1499 struct sample_read_value *v = sample->read.group.values; 1500 1501 sample_read_group__for_each(v, sample->read.group.nr, read_format) { 1502 ret = deliver_sample_value(evlist, tool, event, sample, v, 1503 machine); 1504 if (ret) 1505 break; 1506 } 1507 1508 return ret; 1509 } 1510 1511 static int evlist__deliver_sample(struct evlist *evlist, struct perf_tool *tool, 1512 union perf_event *event, struct perf_sample *sample, 1513 struct evsel *evsel, struct machine *machine) 1514 { 1515 /* We know evsel != NULL. */ 1516 u64 sample_type = evsel->core.attr.sample_type; 1517 u64 read_format = evsel->core.attr.read_format; 1518 1519 /* Standard sample delivery. */ 1520 if (!(sample_type & PERF_SAMPLE_READ)) 1521 return tool->sample(tool, event, sample, evsel, machine); 1522 1523 /* For PERF_SAMPLE_READ we have either single or group mode. */ 1524 if (read_format & PERF_FORMAT_GROUP) 1525 return deliver_sample_group(evlist, tool, event, sample, 1526 machine, read_format); 1527 else 1528 return deliver_sample_value(evlist, tool, event, sample, 1529 &sample->read.one, machine); 1530 } 1531 1532 static int machines__deliver_event(struct machines *machines, 1533 struct evlist *evlist, 1534 union perf_event *event, 1535 struct perf_sample *sample, 1536 struct perf_tool *tool, u64 file_offset, 1537 const char *file_path) 1538 { 1539 struct evsel *evsel; 1540 struct machine *machine; 1541 1542 dump_event(evlist, event, file_offset, sample, file_path); 1543 1544 evsel = evlist__id2evsel(evlist, sample->id); 1545 1546 machine = machines__find_for_cpumode(machines, event, sample); 1547 1548 switch (event->header.type) { 1549 case PERF_RECORD_SAMPLE: 1550 if (evsel == NULL) { 1551 ++evlist->stats.nr_unknown_id; 1552 return 0; 1553 } 1554 if (machine == NULL) { 1555 ++evlist->stats.nr_unprocessable_samples; 1556 dump_sample(evsel, event, sample, perf_env__arch(NULL)); 1557 return 0; 1558 } 1559 dump_sample(evsel, event, sample, perf_env__arch(machine->env)); 1560 return evlist__deliver_sample(evlist, tool, event, sample, evsel, machine); 1561 case PERF_RECORD_MMAP: 1562 return tool->mmap(tool, event, sample, machine); 1563 case PERF_RECORD_MMAP2: 1564 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT) 1565 ++evlist->stats.nr_proc_map_timeout; 1566 return tool->mmap2(tool, event, sample, machine); 1567 case PERF_RECORD_COMM: 1568 return tool->comm(tool, event, sample, machine); 1569 case PERF_RECORD_NAMESPACES: 1570 return tool->namespaces(tool, event, sample, machine); 1571 case PERF_RECORD_CGROUP: 1572 return tool->cgroup(tool, event, sample, machine); 1573 case PERF_RECORD_FORK: 1574 return tool->fork(tool, event, sample, machine); 1575 case PERF_RECORD_EXIT: 1576 return tool->exit(tool, event, sample, machine); 1577 case PERF_RECORD_LOST: 1578 if (tool->lost == perf_event__process_lost) 1579 evlist->stats.total_lost += event->lost.lost; 1580 return tool->lost(tool, event, sample, machine); 1581 case PERF_RECORD_LOST_SAMPLES: 1582 if (tool->lost_samples == perf_event__process_lost_samples) 1583 evlist->stats.total_lost_samples += event->lost_samples.lost; 1584 return tool->lost_samples(tool, event, sample, machine); 1585 case PERF_RECORD_READ: 1586 dump_read(evsel, event); 1587 return tool->read(tool, event, sample, evsel, machine); 1588 case PERF_RECORD_THROTTLE: 1589 return tool->throttle(tool, event, sample, machine); 1590 case PERF_RECORD_UNTHROTTLE: 1591 return tool->unthrottle(tool, event, sample, machine); 1592 case PERF_RECORD_AUX: 1593 if (tool->aux == perf_event__process_aux) { 1594 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) 1595 evlist->stats.total_aux_lost += 1; 1596 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL) 1597 evlist->stats.total_aux_partial += 1; 1598 if (event->aux.flags & PERF_AUX_FLAG_COLLISION) 1599 evlist->stats.total_aux_collision += 1; 1600 } 1601 return tool->aux(tool, event, sample, machine); 1602 case PERF_RECORD_ITRACE_START: 1603 return tool->itrace_start(tool, event, sample, machine); 1604 case PERF_RECORD_SWITCH: 1605 case PERF_RECORD_SWITCH_CPU_WIDE: 1606 return tool->context_switch(tool, event, sample, machine); 1607 case PERF_RECORD_KSYMBOL: 1608 return tool->ksymbol(tool, event, sample, machine); 1609 case PERF_RECORD_BPF_EVENT: 1610 return tool->bpf(tool, event, sample, machine); 1611 case PERF_RECORD_TEXT_POKE: 1612 return tool->text_poke(tool, event, sample, machine); 1613 case PERF_RECORD_AUX_OUTPUT_HW_ID: 1614 return tool->aux_output_hw_id(tool, event, sample, machine); 1615 default: 1616 ++evlist->stats.nr_unknown_events; 1617 return -1; 1618 } 1619 } 1620 1621 static int perf_session__deliver_event(struct perf_session *session, 1622 union perf_event *event, 1623 struct perf_tool *tool, 1624 u64 file_offset, 1625 const char *file_path) 1626 { 1627 struct perf_sample sample; 1628 int ret = evlist__parse_sample(session->evlist, event, &sample); 1629 1630 if (ret) { 1631 pr_err("Can't parse sample, err = %d\n", ret); 1632 return ret; 1633 } 1634 1635 ret = auxtrace__process_event(session, event, &sample, tool); 1636 if (ret < 0) 1637 return ret; 1638 if (ret > 0) 1639 return 0; 1640 1641 ret = machines__deliver_event(&session->machines, session->evlist, 1642 event, &sample, tool, file_offset, file_path); 1643 1644 if (dump_trace && sample.aux_sample.size) 1645 auxtrace__dump_auxtrace_sample(session, &sample); 1646 1647 return ret; 1648 } 1649 1650 static s64 perf_session__process_user_event(struct perf_session *session, 1651 union perf_event *event, 1652 u64 file_offset, 1653 const char *file_path) 1654 { 1655 struct ordered_events *oe = &session->ordered_events; 1656 struct perf_tool *tool = session->tool; 1657 struct perf_sample sample = { .time = 0, }; 1658 int fd = perf_data__fd(session->data); 1659 int err; 1660 1661 if (event->header.type != PERF_RECORD_COMPRESSED || 1662 tool->compressed == perf_session__process_compressed_event_stub) 1663 dump_event(session->evlist, event, file_offset, &sample, file_path); 1664 1665 /* These events are processed right away */ 1666 switch (event->header.type) { 1667 case PERF_RECORD_HEADER_ATTR: 1668 err = tool->attr(tool, event, &session->evlist); 1669 if (err == 0) { 1670 perf_session__set_id_hdr_size(session); 1671 perf_session__set_comm_exec(session); 1672 } 1673 return err; 1674 case PERF_RECORD_EVENT_UPDATE: 1675 return tool->event_update(tool, event, &session->evlist); 1676 case PERF_RECORD_HEADER_EVENT_TYPE: 1677 /* 1678 * Deprecated, but we need to handle it for sake 1679 * of old data files create in pipe mode. 1680 */ 1681 return 0; 1682 case PERF_RECORD_HEADER_TRACING_DATA: 1683 /* 1684 * Setup for reading amidst mmap, but only when we 1685 * are in 'file' mode. The 'pipe' fd is in proper 1686 * place already. 1687 */ 1688 if (!perf_data__is_pipe(session->data)) 1689 lseek(fd, file_offset, SEEK_SET); 1690 return tool->tracing_data(session, event); 1691 case PERF_RECORD_HEADER_BUILD_ID: 1692 return tool->build_id(session, event); 1693 case PERF_RECORD_FINISHED_ROUND: 1694 return tool->finished_round(tool, event, oe); 1695 case PERF_RECORD_ID_INDEX: 1696 return tool->id_index(session, event); 1697 case PERF_RECORD_AUXTRACE_INFO: 1698 return tool->auxtrace_info(session, event); 1699 case PERF_RECORD_AUXTRACE: 1700 /* setup for reading amidst mmap */ 1701 lseek(fd, file_offset + event->header.size, SEEK_SET); 1702 return tool->auxtrace(session, event); 1703 case PERF_RECORD_AUXTRACE_ERROR: 1704 perf_session__auxtrace_error_inc(session, event); 1705 return tool->auxtrace_error(session, event); 1706 case PERF_RECORD_THREAD_MAP: 1707 return tool->thread_map(session, event); 1708 case PERF_RECORD_CPU_MAP: 1709 return tool->cpu_map(session, event); 1710 case PERF_RECORD_STAT_CONFIG: 1711 return tool->stat_config(session, event); 1712 case PERF_RECORD_STAT: 1713 return tool->stat(session, event); 1714 case PERF_RECORD_STAT_ROUND: 1715 return tool->stat_round(session, event); 1716 case PERF_RECORD_TIME_CONV: 1717 session->time_conv = event->time_conv; 1718 return tool->time_conv(session, event); 1719 case PERF_RECORD_HEADER_FEATURE: 1720 return tool->feature(session, event); 1721 case PERF_RECORD_COMPRESSED: 1722 err = tool->compressed(session, event, file_offset, file_path); 1723 if (err) 1724 dump_event(session->evlist, event, file_offset, &sample, file_path); 1725 return err; 1726 case PERF_RECORD_FINISHED_INIT: 1727 return tool->finished_init(session, event); 1728 default: 1729 return -EINVAL; 1730 } 1731 } 1732 1733 int perf_session__deliver_synth_event(struct perf_session *session, 1734 union perf_event *event, 1735 struct perf_sample *sample) 1736 { 1737 struct evlist *evlist = session->evlist; 1738 struct perf_tool *tool = session->tool; 1739 1740 events_stats__inc(&evlist->stats, event->header.type); 1741 1742 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1743 return perf_session__process_user_event(session, event, 0, NULL); 1744 1745 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0, NULL); 1746 } 1747 1748 static void event_swap(union perf_event *event, bool sample_id_all) 1749 { 1750 perf_event__swap_op swap; 1751 1752 swap = perf_event__swap_ops[event->header.type]; 1753 if (swap) 1754 swap(event, sample_id_all); 1755 } 1756 1757 int perf_session__peek_event(struct perf_session *session, off_t file_offset, 1758 void *buf, size_t buf_sz, 1759 union perf_event **event_ptr, 1760 struct perf_sample *sample) 1761 { 1762 union perf_event *event; 1763 size_t hdr_sz, rest; 1764 int fd; 1765 1766 if (session->one_mmap && !session->header.needs_swap) { 1767 event = file_offset - session->one_mmap_offset + 1768 session->one_mmap_addr; 1769 goto out_parse_sample; 1770 } 1771 1772 if (perf_data__is_pipe(session->data)) 1773 return -1; 1774 1775 fd = perf_data__fd(session->data); 1776 hdr_sz = sizeof(struct perf_event_header); 1777 1778 if (buf_sz < hdr_sz) 1779 return -1; 1780 1781 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 || 1782 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz) 1783 return -1; 1784 1785 event = (union perf_event *)buf; 1786 1787 if (session->header.needs_swap) 1788 perf_event_header__bswap(&event->header); 1789 1790 if (event->header.size < hdr_sz || event->header.size > buf_sz) 1791 return -1; 1792 1793 buf += hdr_sz; 1794 rest = event->header.size - hdr_sz; 1795 1796 if (readn(fd, buf, rest) != (ssize_t)rest) 1797 return -1; 1798 1799 if (session->header.needs_swap) 1800 event_swap(event, evlist__sample_id_all(session->evlist)); 1801 1802 out_parse_sample: 1803 1804 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START && 1805 evlist__parse_sample(session->evlist, event, sample)) 1806 return -1; 1807 1808 *event_ptr = event; 1809 1810 return 0; 1811 } 1812 1813 int perf_session__peek_events(struct perf_session *session, u64 offset, 1814 u64 size, peek_events_cb_t cb, void *data) 1815 { 1816 u64 max_offset = offset + size; 1817 char buf[PERF_SAMPLE_MAX_SIZE]; 1818 union perf_event *event; 1819 int err; 1820 1821 do { 1822 err = perf_session__peek_event(session, offset, buf, 1823 PERF_SAMPLE_MAX_SIZE, &event, 1824 NULL); 1825 if (err) 1826 return err; 1827 1828 err = cb(session, event, offset, data); 1829 if (err) 1830 return err; 1831 1832 offset += event->header.size; 1833 if (event->header.type == PERF_RECORD_AUXTRACE) 1834 offset += event->auxtrace.size; 1835 1836 } while (offset < max_offset); 1837 1838 return err; 1839 } 1840 1841 static s64 perf_session__process_event(struct perf_session *session, 1842 union perf_event *event, u64 file_offset, 1843 const char *file_path) 1844 { 1845 struct evlist *evlist = session->evlist; 1846 struct perf_tool *tool = session->tool; 1847 int ret; 1848 1849 if (session->header.needs_swap) 1850 event_swap(event, evlist__sample_id_all(evlist)); 1851 1852 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1853 return -EINVAL; 1854 1855 events_stats__inc(&evlist->stats, event->header.type); 1856 1857 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1858 return perf_session__process_user_event(session, event, file_offset, file_path); 1859 1860 if (tool->ordered_events) { 1861 u64 timestamp = -1ULL; 1862 1863 ret = evlist__parse_sample_timestamp(evlist, event, ×tamp); 1864 if (ret && ret != -1) 1865 return ret; 1866 1867 ret = perf_session__queue_event(session, event, timestamp, file_offset, file_path); 1868 if (ret != -ETIME) 1869 return ret; 1870 } 1871 1872 return perf_session__deliver_event(session, event, tool, file_offset, file_path); 1873 } 1874 1875 void perf_event_header__bswap(struct perf_event_header *hdr) 1876 { 1877 hdr->type = bswap_32(hdr->type); 1878 hdr->misc = bswap_16(hdr->misc); 1879 hdr->size = bswap_16(hdr->size); 1880 } 1881 1882 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1883 { 1884 return machine__findnew_thread(&session->machines.host, -1, pid); 1885 } 1886 1887 int perf_session__register_idle_thread(struct perf_session *session) 1888 { 1889 struct thread *thread = machine__idle_thread(&session->machines.host); 1890 1891 /* machine__idle_thread() got the thread, so put it */ 1892 thread__put(thread); 1893 return thread ? 0 : -1; 1894 } 1895 1896 static void 1897 perf_session__warn_order(const struct perf_session *session) 1898 { 1899 const struct ordered_events *oe = &session->ordered_events; 1900 struct evsel *evsel; 1901 bool should_warn = true; 1902 1903 evlist__for_each_entry(session->evlist, evsel) { 1904 if (evsel->core.attr.write_backward) 1905 should_warn = false; 1906 } 1907 1908 if (!should_warn) 1909 return; 1910 if (oe->nr_unordered_events != 0) 1911 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events); 1912 } 1913 1914 static void perf_session__warn_about_errors(const struct perf_session *session) 1915 { 1916 const struct events_stats *stats = &session->evlist->stats; 1917 1918 if (session->tool->lost == perf_event__process_lost && 1919 stats->nr_events[PERF_RECORD_LOST] != 0) { 1920 ui__warning("Processed %d events and lost %d chunks!\n\n" 1921 "Check IO/CPU overload!\n\n", 1922 stats->nr_events[0], 1923 stats->nr_events[PERF_RECORD_LOST]); 1924 } 1925 1926 if (session->tool->lost_samples == perf_event__process_lost_samples) { 1927 double drop_rate; 1928 1929 drop_rate = (double)stats->total_lost_samples / 1930 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples); 1931 if (drop_rate > 0.05) { 1932 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n", 1933 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples, 1934 drop_rate * 100.0); 1935 } 1936 } 1937 1938 if (session->tool->aux == perf_event__process_aux && 1939 stats->total_aux_lost != 0) { 1940 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n", 1941 stats->total_aux_lost, 1942 stats->nr_events[PERF_RECORD_AUX]); 1943 } 1944 1945 if (session->tool->aux == perf_event__process_aux && 1946 stats->total_aux_partial != 0) { 1947 bool vmm_exclusive = false; 1948 1949 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive", 1950 &vmm_exclusive); 1951 1952 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n" 1953 "Are you running a KVM guest in the background?%s\n\n", 1954 stats->total_aux_partial, 1955 stats->nr_events[PERF_RECORD_AUX], 1956 vmm_exclusive ? 1957 "\nReloading kvm_intel module with vmm_exclusive=0\n" 1958 "will reduce the gaps to only guest's timeslices." : 1959 ""); 1960 } 1961 1962 if (session->tool->aux == perf_event__process_aux && 1963 stats->total_aux_collision != 0) { 1964 ui__warning("AUX data detected collision %" PRIu64 " times out of %u!\n\n", 1965 stats->total_aux_collision, 1966 stats->nr_events[PERF_RECORD_AUX]); 1967 } 1968 1969 if (stats->nr_unknown_events != 0) { 1970 ui__warning("Found %u unknown events!\n\n" 1971 "Is this an older tool processing a perf.data " 1972 "file generated by a more recent tool?\n\n" 1973 "If that is not the case, consider " 1974 "reporting to linux-kernel@vger.kernel.org.\n\n", 1975 stats->nr_unknown_events); 1976 } 1977 1978 if (stats->nr_unknown_id != 0) { 1979 ui__warning("%u samples with id not present in the header\n", 1980 stats->nr_unknown_id); 1981 } 1982 1983 if (stats->nr_invalid_chains != 0) { 1984 ui__warning("Found invalid callchains!\n\n" 1985 "%u out of %u events were discarded for this reason.\n\n" 1986 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1987 stats->nr_invalid_chains, 1988 stats->nr_events[PERF_RECORD_SAMPLE]); 1989 } 1990 1991 if (stats->nr_unprocessable_samples != 0) { 1992 ui__warning("%u unprocessable samples recorded.\n" 1993 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1994 stats->nr_unprocessable_samples); 1995 } 1996 1997 perf_session__warn_order(session); 1998 1999 events_stats__auxtrace_error_warn(stats); 2000 2001 if (stats->nr_proc_map_timeout != 0) { 2002 ui__warning("%d map information files for pre-existing threads were\n" 2003 "not processed, if there are samples for addresses they\n" 2004 "will not be resolved, you may find out which are these\n" 2005 "threads by running with -v and redirecting the output\n" 2006 "to a file.\n" 2007 "The time limit to process proc map is too short?\n" 2008 "Increase it by --proc-map-timeout\n", 2009 stats->nr_proc_map_timeout); 2010 } 2011 } 2012 2013 static int perf_session__flush_thread_stack(struct thread *thread, 2014 void *p __maybe_unused) 2015 { 2016 return thread_stack__flush(thread); 2017 } 2018 2019 static int perf_session__flush_thread_stacks(struct perf_session *session) 2020 { 2021 return machines__for_each_thread(&session->machines, 2022 perf_session__flush_thread_stack, 2023 NULL); 2024 } 2025 2026 volatile sig_atomic_t session_done; 2027 2028 static int __perf_session__process_decomp_events(struct perf_session *session); 2029 2030 static int __perf_session__process_pipe_events(struct perf_session *session) 2031 { 2032 struct ordered_events *oe = &session->ordered_events; 2033 struct perf_tool *tool = session->tool; 2034 union perf_event *event; 2035 uint32_t size, cur_size = 0; 2036 void *buf = NULL; 2037 s64 skip = 0; 2038 u64 head; 2039 ssize_t err; 2040 void *p; 2041 2042 perf_tool__fill_defaults(tool); 2043 2044 head = 0; 2045 cur_size = sizeof(union perf_event); 2046 2047 buf = malloc(cur_size); 2048 if (!buf) 2049 return -errno; 2050 ordered_events__set_copy_on_queue(oe, true); 2051 more: 2052 event = buf; 2053 err = perf_data__read(session->data, event, 2054 sizeof(struct perf_event_header)); 2055 if (err <= 0) { 2056 if (err == 0) 2057 goto done; 2058 2059 pr_err("failed to read event header\n"); 2060 goto out_err; 2061 } 2062 2063 if (session->header.needs_swap) 2064 perf_event_header__bswap(&event->header); 2065 2066 size = event->header.size; 2067 if (size < sizeof(struct perf_event_header)) { 2068 pr_err("bad event header size\n"); 2069 goto out_err; 2070 } 2071 2072 if (size > cur_size) { 2073 void *new = realloc(buf, size); 2074 if (!new) { 2075 pr_err("failed to allocate memory to read event\n"); 2076 goto out_err; 2077 } 2078 buf = new; 2079 cur_size = size; 2080 event = buf; 2081 } 2082 p = event; 2083 p += sizeof(struct perf_event_header); 2084 2085 if (size - sizeof(struct perf_event_header)) { 2086 err = perf_data__read(session->data, p, 2087 size - sizeof(struct perf_event_header)); 2088 if (err <= 0) { 2089 if (err == 0) { 2090 pr_err("unexpected end of event stream\n"); 2091 goto done; 2092 } 2093 2094 pr_err("failed to read event data\n"); 2095 goto out_err; 2096 } 2097 } 2098 2099 if ((skip = perf_session__process_event(session, event, head, "pipe")) < 0) { 2100 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 2101 head, event->header.size, event->header.type); 2102 err = -EINVAL; 2103 goto out_err; 2104 } 2105 2106 head += size; 2107 2108 if (skip > 0) 2109 head += skip; 2110 2111 err = __perf_session__process_decomp_events(session); 2112 if (err) 2113 goto out_err; 2114 2115 if (!session_done()) 2116 goto more; 2117 done: 2118 /* do the final flush for ordered samples */ 2119 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 2120 if (err) 2121 goto out_err; 2122 err = auxtrace__flush_events(session, tool); 2123 if (err) 2124 goto out_err; 2125 err = perf_session__flush_thread_stacks(session); 2126 out_err: 2127 free(buf); 2128 if (!tool->no_warn) 2129 perf_session__warn_about_errors(session); 2130 ordered_events__free(&session->ordered_events); 2131 auxtrace__free_events(session); 2132 return err; 2133 } 2134 2135 static union perf_event * 2136 prefetch_event(char *buf, u64 head, size_t mmap_size, 2137 bool needs_swap, union perf_event *error) 2138 { 2139 union perf_event *event; 2140 u16 event_size; 2141 2142 /* 2143 * Ensure we have enough space remaining to read 2144 * the size of the event in the headers. 2145 */ 2146 if (head + sizeof(event->header) > mmap_size) 2147 return NULL; 2148 2149 event = (union perf_event *)(buf + head); 2150 if (needs_swap) 2151 perf_event_header__bswap(&event->header); 2152 2153 event_size = event->header.size; 2154 if (head + event_size <= mmap_size) 2155 return event; 2156 2157 /* We're not fetching the event so swap back again */ 2158 if (needs_swap) 2159 perf_event_header__bswap(&event->header); 2160 2161 /* Check if the event fits into the next mmapped buf. */ 2162 if (event_size <= mmap_size - head % page_size) { 2163 /* Remap buf and fetch again. */ 2164 return NULL; 2165 } 2166 2167 /* Invalid input. Event size should never exceed mmap_size. */ 2168 pr_debug("%s: head=%#" PRIx64 " event->header.size=%#x, mmap_size=%#zx:" 2169 " fuzzed or compressed perf.data?\n", __func__, head, event_size, mmap_size); 2170 2171 return error; 2172 } 2173 2174 static union perf_event * 2175 fetch_mmaped_event(u64 head, size_t mmap_size, char *buf, bool needs_swap) 2176 { 2177 return prefetch_event(buf, head, mmap_size, needs_swap, ERR_PTR(-EINVAL)); 2178 } 2179 2180 static union perf_event * 2181 fetch_decomp_event(u64 head, size_t mmap_size, char *buf, bool needs_swap) 2182 { 2183 return prefetch_event(buf, head, mmap_size, needs_swap, NULL); 2184 } 2185 2186 static int __perf_session__process_decomp_events(struct perf_session *session) 2187 { 2188 s64 skip; 2189 u64 size; 2190 struct decomp *decomp = session->active_decomp->decomp_last; 2191 2192 if (!decomp) 2193 return 0; 2194 2195 while (decomp->head < decomp->size && !session_done()) { 2196 union perf_event *event = fetch_decomp_event(decomp->head, decomp->size, decomp->data, 2197 session->header.needs_swap); 2198 2199 if (!event) 2200 break; 2201 2202 size = event->header.size; 2203 2204 if (size < sizeof(struct perf_event_header) || 2205 (skip = perf_session__process_event(session, event, decomp->file_pos, 2206 decomp->file_path)) < 0) { 2207 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 2208 decomp->file_pos + decomp->head, event->header.size, event->header.type); 2209 return -EINVAL; 2210 } 2211 2212 if (skip) 2213 size += skip; 2214 2215 decomp->head += size; 2216 } 2217 2218 return 0; 2219 } 2220 2221 /* 2222 * On 64bit we can mmap the data file in one go. No need for tiny mmap 2223 * slices. On 32bit we use 32MB. 2224 */ 2225 #if BITS_PER_LONG == 64 2226 #define MMAP_SIZE ULLONG_MAX 2227 #define NUM_MMAPS 1 2228 #else 2229 #define MMAP_SIZE (32 * 1024 * 1024ULL) 2230 #define NUM_MMAPS 128 2231 #endif 2232 2233 struct reader; 2234 2235 typedef s64 (*reader_cb_t)(struct perf_session *session, 2236 union perf_event *event, 2237 u64 file_offset, 2238 const char *file_path); 2239 2240 struct reader { 2241 int fd; 2242 const char *path; 2243 u64 data_size; 2244 u64 data_offset; 2245 reader_cb_t process; 2246 bool in_place_update; 2247 char *mmaps[NUM_MMAPS]; 2248 size_t mmap_size; 2249 int mmap_idx; 2250 char *mmap_cur; 2251 u64 file_pos; 2252 u64 file_offset; 2253 u64 head; 2254 u64 size; 2255 bool done; 2256 struct zstd_data zstd_data; 2257 struct decomp_data decomp_data; 2258 }; 2259 2260 static int 2261 reader__init(struct reader *rd, bool *one_mmap) 2262 { 2263 u64 data_size = rd->data_size; 2264 char **mmaps = rd->mmaps; 2265 2266 rd->head = rd->data_offset; 2267 data_size += rd->data_offset; 2268 2269 rd->mmap_size = MMAP_SIZE; 2270 if (rd->mmap_size > data_size) { 2271 rd->mmap_size = data_size; 2272 if (one_mmap) 2273 *one_mmap = true; 2274 } 2275 2276 memset(mmaps, 0, sizeof(rd->mmaps)); 2277 2278 if (zstd_init(&rd->zstd_data, 0)) 2279 return -1; 2280 rd->decomp_data.zstd_decomp = &rd->zstd_data; 2281 2282 return 0; 2283 } 2284 2285 static void 2286 reader__release_decomp(struct reader *rd) 2287 { 2288 perf_decomp__release_events(rd->decomp_data.decomp); 2289 zstd_fini(&rd->zstd_data); 2290 } 2291 2292 static int 2293 reader__mmap(struct reader *rd, struct perf_session *session) 2294 { 2295 int mmap_prot, mmap_flags; 2296 char *buf, **mmaps = rd->mmaps; 2297 u64 page_offset; 2298 2299 mmap_prot = PROT_READ; 2300 mmap_flags = MAP_SHARED; 2301 2302 if (rd->in_place_update) { 2303 mmap_prot |= PROT_WRITE; 2304 } else if (session->header.needs_swap) { 2305 mmap_prot |= PROT_WRITE; 2306 mmap_flags = MAP_PRIVATE; 2307 } 2308 2309 if (mmaps[rd->mmap_idx]) { 2310 munmap(mmaps[rd->mmap_idx], rd->mmap_size); 2311 mmaps[rd->mmap_idx] = NULL; 2312 } 2313 2314 page_offset = page_size * (rd->head / page_size); 2315 rd->file_offset += page_offset; 2316 rd->head -= page_offset; 2317 2318 buf = mmap(NULL, rd->mmap_size, mmap_prot, mmap_flags, rd->fd, 2319 rd->file_offset); 2320 if (buf == MAP_FAILED) { 2321 pr_err("failed to mmap file\n"); 2322 return -errno; 2323 } 2324 mmaps[rd->mmap_idx] = rd->mmap_cur = buf; 2325 rd->mmap_idx = (rd->mmap_idx + 1) & (ARRAY_SIZE(rd->mmaps) - 1); 2326 rd->file_pos = rd->file_offset + rd->head; 2327 if (session->one_mmap) { 2328 session->one_mmap_addr = buf; 2329 session->one_mmap_offset = rd->file_offset; 2330 } 2331 2332 return 0; 2333 } 2334 2335 enum { 2336 READER_OK, 2337 READER_NODATA, 2338 }; 2339 2340 static int 2341 reader__read_event(struct reader *rd, struct perf_session *session, 2342 struct ui_progress *prog) 2343 { 2344 u64 size; 2345 int err = READER_OK; 2346 union perf_event *event; 2347 s64 skip; 2348 2349 event = fetch_mmaped_event(rd->head, rd->mmap_size, rd->mmap_cur, 2350 session->header.needs_swap); 2351 if (IS_ERR(event)) 2352 return PTR_ERR(event); 2353 2354 if (!event) 2355 return READER_NODATA; 2356 2357 size = event->header.size; 2358 2359 skip = -EINVAL; 2360 2361 if (size < sizeof(struct perf_event_header) || 2362 (skip = rd->process(session, event, rd->file_pos, rd->path)) < 0) { 2363 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n", 2364 rd->file_offset + rd->head, event->header.size, 2365 event->header.type, strerror(-skip)); 2366 err = skip; 2367 goto out; 2368 } 2369 2370 if (skip) 2371 size += skip; 2372 2373 rd->size += size; 2374 rd->head += size; 2375 rd->file_pos += size; 2376 2377 err = __perf_session__process_decomp_events(session); 2378 if (err) 2379 goto out; 2380 2381 ui_progress__update(prog, size); 2382 2383 out: 2384 return err; 2385 } 2386 2387 static inline bool 2388 reader__eof(struct reader *rd) 2389 { 2390 return (rd->file_pos >= rd->data_size + rd->data_offset); 2391 } 2392 2393 static int 2394 reader__process_events(struct reader *rd, struct perf_session *session, 2395 struct ui_progress *prog) 2396 { 2397 int err; 2398 2399 err = reader__init(rd, &session->one_mmap); 2400 if (err) 2401 goto out; 2402 2403 session->active_decomp = &rd->decomp_data; 2404 2405 remap: 2406 err = reader__mmap(rd, session); 2407 if (err) 2408 goto out; 2409 2410 more: 2411 err = reader__read_event(rd, session, prog); 2412 if (err < 0) 2413 goto out; 2414 else if (err == READER_NODATA) 2415 goto remap; 2416 2417 if (session_done()) 2418 goto out; 2419 2420 if (!reader__eof(rd)) 2421 goto more; 2422 2423 out: 2424 session->active_decomp = &session->decomp_data; 2425 return err; 2426 } 2427 2428 static s64 process_simple(struct perf_session *session, 2429 union perf_event *event, 2430 u64 file_offset, 2431 const char *file_path) 2432 { 2433 return perf_session__process_event(session, event, file_offset, file_path); 2434 } 2435 2436 static int __perf_session__process_events(struct perf_session *session) 2437 { 2438 struct reader rd = { 2439 .fd = perf_data__fd(session->data), 2440 .path = session->data->file.path, 2441 .data_size = session->header.data_size, 2442 .data_offset = session->header.data_offset, 2443 .process = process_simple, 2444 .in_place_update = session->data->in_place_update, 2445 }; 2446 struct ordered_events *oe = &session->ordered_events; 2447 struct perf_tool *tool = session->tool; 2448 struct ui_progress prog; 2449 int err; 2450 2451 perf_tool__fill_defaults(tool); 2452 2453 if (rd.data_size == 0) 2454 return -1; 2455 2456 ui_progress__init_size(&prog, rd.data_size, "Processing events..."); 2457 2458 err = reader__process_events(&rd, session, &prog); 2459 if (err) 2460 goto out_err; 2461 /* do the final flush for ordered samples */ 2462 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 2463 if (err) 2464 goto out_err; 2465 err = auxtrace__flush_events(session, tool); 2466 if (err) 2467 goto out_err; 2468 err = perf_session__flush_thread_stacks(session); 2469 out_err: 2470 ui_progress__finish(); 2471 if (!tool->no_warn) 2472 perf_session__warn_about_errors(session); 2473 /* 2474 * We may switching perf.data output, make ordered_events 2475 * reusable. 2476 */ 2477 ordered_events__reinit(&session->ordered_events); 2478 auxtrace__free_events(session); 2479 reader__release_decomp(&rd); 2480 session->one_mmap = false; 2481 return err; 2482 } 2483 2484 /* 2485 * Processing 2 MB of data from each reader in sequence, 2486 * because that's the way the ordered events sorting works 2487 * most efficiently. 2488 */ 2489 #define READER_MAX_SIZE (2 * 1024 * 1024) 2490 2491 /* 2492 * This function reads, merge and process directory data. 2493 * It assumens the version 1 of directory data, where each 2494 * data file holds per-cpu data, already sorted by kernel. 2495 */ 2496 static int __perf_session__process_dir_events(struct perf_session *session) 2497 { 2498 struct perf_data *data = session->data; 2499 struct perf_tool *tool = session->tool; 2500 int i, ret, readers, nr_readers; 2501 struct ui_progress prog; 2502 u64 total_size = perf_data__size(session->data); 2503 struct reader *rd; 2504 2505 perf_tool__fill_defaults(tool); 2506 2507 ui_progress__init_size(&prog, total_size, "Sorting events..."); 2508 2509 nr_readers = 1; 2510 for (i = 0; i < data->dir.nr; i++) { 2511 if (data->dir.files[i].size) 2512 nr_readers++; 2513 } 2514 2515 rd = zalloc(nr_readers * sizeof(struct reader)); 2516 if (!rd) 2517 return -ENOMEM; 2518 2519 rd[0] = (struct reader) { 2520 .fd = perf_data__fd(session->data), 2521 .path = session->data->file.path, 2522 .data_size = session->header.data_size, 2523 .data_offset = session->header.data_offset, 2524 .process = process_simple, 2525 .in_place_update = session->data->in_place_update, 2526 }; 2527 ret = reader__init(&rd[0], NULL); 2528 if (ret) 2529 goto out_err; 2530 ret = reader__mmap(&rd[0], session); 2531 if (ret) 2532 goto out_err; 2533 readers = 1; 2534 2535 for (i = 0; i < data->dir.nr; i++) { 2536 if (!data->dir.files[i].size) 2537 continue; 2538 rd[readers] = (struct reader) { 2539 .fd = data->dir.files[i].fd, 2540 .path = data->dir.files[i].path, 2541 .data_size = data->dir.files[i].size, 2542 .data_offset = 0, 2543 .process = process_simple, 2544 .in_place_update = session->data->in_place_update, 2545 }; 2546 ret = reader__init(&rd[readers], NULL); 2547 if (ret) 2548 goto out_err; 2549 ret = reader__mmap(&rd[readers], session); 2550 if (ret) 2551 goto out_err; 2552 readers++; 2553 } 2554 2555 i = 0; 2556 while (readers) { 2557 if (session_done()) 2558 break; 2559 2560 if (rd[i].done) { 2561 i = (i + 1) % nr_readers; 2562 continue; 2563 } 2564 if (reader__eof(&rd[i])) { 2565 rd[i].done = true; 2566 readers--; 2567 continue; 2568 } 2569 2570 session->active_decomp = &rd[i].decomp_data; 2571 ret = reader__read_event(&rd[i], session, &prog); 2572 if (ret < 0) { 2573 goto out_err; 2574 } else if (ret == READER_NODATA) { 2575 ret = reader__mmap(&rd[i], session); 2576 if (ret) 2577 goto out_err; 2578 } 2579 2580 if (rd[i].size >= READER_MAX_SIZE) { 2581 rd[i].size = 0; 2582 i = (i + 1) % nr_readers; 2583 } 2584 } 2585 2586 ret = ordered_events__flush(&session->ordered_events, OE_FLUSH__FINAL); 2587 if (ret) 2588 goto out_err; 2589 2590 ret = perf_session__flush_thread_stacks(session); 2591 out_err: 2592 ui_progress__finish(); 2593 2594 if (!tool->no_warn) 2595 perf_session__warn_about_errors(session); 2596 2597 /* 2598 * We may switching perf.data output, make ordered_events 2599 * reusable. 2600 */ 2601 ordered_events__reinit(&session->ordered_events); 2602 2603 session->one_mmap = false; 2604 2605 session->active_decomp = &session->decomp_data; 2606 for (i = 0; i < nr_readers; i++) 2607 reader__release_decomp(&rd[i]); 2608 zfree(&rd); 2609 2610 return ret; 2611 } 2612 2613 int perf_session__process_events(struct perf_session *session) 2614 { 2615 if (perf_session__register_idle_thread(session) < 0) 2616 return -ENOMEM; 2617 2618 if (perf_data__is_pipe(session->data)) 2619 return __perf_session__process_pipe_events(session); 2620 2621 if (perf_data__is_dir(session->data) && session->data->dir.nr) 2622 return __perf_session__process_dir_events(session); 2623 2624 return __perf_session__process_events(session); 2625 } 2626 2627 bool perf_session__has_traces(struct perf_session *session, const char *msg) 2628 { 2629 struct evsel *evsel; 2630 2631 evlist__for_each_entry(session->evlist, evsel) { 2632 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) 2633 return true; 2634 } 2635 2636 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 2637 return false; 2638 } 2639 2640 int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr) 2641 { 2642 char *bracket; 2643 struct ref_reloc_sym *ref; 2644 struct kmap *kmap; 2645 2646 ref = zalloc(sizeof(struct ref_reloc_sym)); 2647 if (ref == NULL) 2648 return -ENOMEM; 2649 2650 ref->name = strdup(symbol_name); 2651 if (ref->name == NULL) { 2652 free(ref); 2653 return -ENOMEM; 2654 } 2655 2656 bracket = strchr(ref->name, ']'); 2657 if (bracket) 2658 *bracket = '\0'; 2659 2660 ref->addr = addr; 2661 2662 kmap = map__kmap(map); 2663 if (kmap) 2664 kmap->ref_reloc_sym = ref; 2665 2666 return 0; 2667 } 2668 2669 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp) 2670 { 2671 return machines__fprintf_dsos(&session->machines, fp); 2672 } 2673 2674 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp, 2675 bool (skip)(struct dso *dso, int parm), int parm) 2676 { 2677 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm); 2678 } 2679 2680 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp, 2681 bool skip_empty) 2682 { 2683 size_t ret; 2684 const char *msg = ""; 2685 2686 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE)) 2687 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)"; 2688 2689 ret = fprintf(fp, "\nAggregated stats:%s\n", msg); 2690 2691 ret += events_stats__fprintf(&session->evlist->stats, fp, skip_empty); 2692 return ret; 2693 } 2694 2695 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 2696 { 2697 /* 2698 * FIXME: Here we have to actually print all the machines in this 2699 * session, not just the host... 2700 */ 2701 return machine__fprintf(&session->machines.host, fp); 2702 } 2703 2704 struct evsel *perf_session__find_first_evtype(struct perf_session *session, 2705 unsigned int type) 2706 { 2707 struct evsel *pos; 2708 2709 evlist__for_each_entry(session->evlist, pos) { 2710 if (pos->core.attr.type == type) 2711 return pos; 2712 } 2713 return NULL; 2714 } 2715 2716 int perf_session__cpu_bitmap(struct perf_session *session, 2717 const char *cpu_list, unsigned long *cpu_bitmap) 2718 { 2719 int i, err = -1; 2720 struct perf_cpu_map *map; 2721 int nr_cpus = min(session->header.env.nr_cpus_avail, MAX_NR_CPUS); 2722 2723 for (i = 0; i < PERF_TYPE_MAX; ++i) { 2724 struct evsel *evsel; 2725 2726 evsel = perf_session__find_first_evtype(session, i); 2727 if (!evsel) 2728 continue; 2729 2730 if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CPU)) { 2731 pr_err("File does not contain CPU events. " 2732 "Remove -C option to proceed.\n"); 2733 return -1; 2734 } 2735 } 2736 2737 map = perf_cpu_map__new(cpu_list); 2738 if (map == NULL) { 2739 pr_err("Invalid cpu_list\n"); 2740 return -1; 2741 } 2742 2743 for (i = 0; i < perf_cpu_map__nr(map); i++) { 2744 struct perf_cpu cpu = perf_cpu_map__cpu(map, i); 2745 2746 if (cpu.cpu >= nr_cpus) { 2747 pr_err("Requested CPU %d too large. " 2748 "Consider raising MAX_NR_CPUS\n", cpu.cpu); 2749 goto out_delete_map; 2750 } 2751 2752 set_bit(cpu.cpu, cpu_bitmap); 2753 } 2754 2755 err = 0; 2756 2757 out_delete_map: 2758 perf_cpu_map__put(map); 2759 return err; 2760 } 2761 2762 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 2763 bool full) 2764 { 2765 if (session == NULL || fp == NULL) 2766 return; 2767 2768 fprintf(fp, "# ========\n"); 2769 perf_header__fprintf_info(session, fp, full); 2770 fprintf(fp, "# ========\n#\n"); 2771 } 2772 2773 static int perf_session__register_guest(struct perf_session *session, pid_t machine_pid) 2774 { 2775 struct machine *machine = machines__findnew(&session->machines, machine_pid); 2776 struct thread *thread; 2777 2778 if (!machine) 2779 return -ENOMEM; 2780 2781 machine->single_address_space = session->machines.host.single_address_space; 2782 2783 thread = machine__idle_thread(machine); 2784 if (!thread) 2785 return -ENOMEM; 2786 thread__put(thread); 2787 2788 machine->kallsyms_filename = perf_data__guest_kallsyms_name(session->data, machine_pid); 2789 2790 return 0; 2791 } 2792 2793 static int perf_session__set_guest_cpu(struct perf_session *session, pid_t pid, 2794 pid_t tid, int guest_cpu) 2795 { 2796 struct machine *machine = &session->machines.host; 2797 struct thread *thread = machine__findnew_thread(machine, pid, tid); 2798 2799 if (!thread) 2800 return -ENOMEM; 2801 thread->guest_cpu = guest_cpu; 2802 thread__put(thread); 2803 2804 return 0; 2805 } 2806 2807 int perf_event__process_id_index(struct perf_session *session, 2808 union perf_event *event) 2809 { 2810 struct evlist *evlist = session->evlist; 2811 struct perf_record_id_index *ie = &event->id_index; 2812 size_t sz = ie->header.size - sizeof(*ie); 2813 size_t i, nr, max_nr; 2814 size_t e1_sz = sizeof(struct id_index_entry); 2815 size_t e2_sz = sizeof(struct id_index_entry_2); 2816 size_t etot_sz = e1_sz + e2_sz; 2817 struct id_index_entry_2 *e2; 2818 pid_t last_pid = 0; 2819 2820 max_nr = sz / e1_sz; 2821 nr = ie->nr; 2822 if (nr > max_nr) { 2823 printf("Too big: nr %zu max_nr %zu\n", nr, max_nr); 2824 return -EINVAL; 2825 } 2826 2827 if (sz >= nr * etot_sz) { 2828 max_nr = sz / etot_sz; 2829 if (nr > max_nr) { 2830 printf("Too big2: nr %zu max_nr %zu\n", nr, max_nr); 2831 return -EINVAL; 2832 } 2833 e2 = (void *)ie + sizeof(*ie) + nr * e1_sz; 2834 } else { 2835 e2 = NULL; 2836 } 2837 2838 if (dump_trace) 2839 fprintf(stdout, " nr: %zu\n", nr); 2840 2841 for (i = 0; i < nr; i++, (e2 ? e2++ : 0)) { 2842 struct id_index_entry *e = &ie->entries[i]; 2843 struct perf_sample_id *sid; 2844 int ret; 2845 2846 if (dump_trace) { 2847 fprintf(stdout, " ... id: %"PRI_lu64, e->id); 2848 fprintf(stdout, " idx: %"PRI_lu64, e->idx); 2849 fprintf(stdout, " cpu: %"PRI_ld64, e->cpu); 2850 fprintf(stdout, " tid: %"PRI_ld64, e->tid); 2851 if (e2) { 2852 fprintf(stdout, " machine_pid: %"PRI_ld64, e2->machine_pid); 2853 fprintf(stdout, " vcpu: %"PRI_lu64"\n", e2->vcpu); 2854 } else { 2855 fprintf(stdout, "\n"); 2856 } 2857 } 2858 2859 sid = evlist__id2sid(evlist, e->id); 2860 if (!sid) 2861 return -ENOENT; 2862 2863 sid->idx = e->idx; 2864 sid->cpu.cpu = e->cpu; 2865 sid->tid = e->tid; 2866 2867 if (!e2) 2868 continue; 2869 2870 sid->machine_pid = e2->machine_pid; 2871 sid->vcpu.cpu = e2->vcpu; 2872 2873 if (!sid->machine_pid) 2874 continue; 2875 2876 if (sid->machine_pid != last_pid) { 2877 ret = perf_session__register_guest(session, sid->machine_pid); 2878 if (ret) 2879 return ret; 2880 last_pid = sid->machine_pid; 2881 perf_guest = true; 2882 } 2883 2884 ret = perf_session__set_guest_cpu(session, sid->machine_pid, e->tid, e2->vcpu); 2885 if (ret) 2886 return ret; 2887 } 2888 return 0; 2889 } 2890