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