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 #ifdef HAVE_LIBTRACEEVENT 318 trace_event__cleanup(&session->tevent); 319 #endif 320 free(session); 321 } 322 323 static int process_event_synth_tracing_data_stub(struct perf_session *session 324 __maybe_unused, 325 union perf_event *event 326 __maybe_unused) 327 { 328 dump_printf(": unhandled!\n"); 329 return 0; 330 } 331 332 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused, 333 union perf_event *event __maybe_unused, 334 struct evlist **pevlist 335 __maybe_unused) 336 { 337 dump_printf(": unhandled!\n"); 338 return 0; 339 } 340 341 static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused, 342 union perf_event *event __maybe_unused, 343 struct evlist **pevlist 344 __maybe_unused) 345 { 346 if (dump_trace) 347 perf_event__fprintf_event_update(event, stdout); 348 349 dump_printf(": unhandled!\n"); 350 return 0; 351 } 352 353 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused, 354 union perf_event *event __maybe_unused, 355 struct perf_sample *sample __maybe_unused, 356 struct evsel *evsel __maybe_unused, 357 struct machine *machine __maybe_unused) 358 { 359 dump_printf(": unhandled!\n"); 360 return 0; 361 } 362 363 static int process_event_stub(struct perf_tool *tool __maybe_unused, 364 union perf_event *event __maybe_unused, 365 struct perf_sample *sample __maybe_unused, 366 struct machine *machine __maybe_unused) 367 { 368 dump_printf(": unhandled!\n"); 369 return 0; 370 } 371 372 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused, 373 union perf_event *event __maybe_unused, 374 struct ordered_events *oe __maybe_unused) 375 { 376 dump_printf(": unhandled!\n"); 377 return 0; 378 } 379 380 static int skipn(int fd, off_t n) 381 { 382 char buf[4096]; 383 ssize_t ret; 384 385 while (n > 0) { 386 ret = read(fd, buf, min(n, (off_t)sizeof(buf))); 387 if (ret <= 0) 388 return ret; 389 n -= ret; 390 } 391 392 return 0; 393 } 394 395 static s64 process_event_auxtrace_stub(struct perf_session *session __maybe_unused, 396 union perf_event *event) 397 { 398 dump_printf(": unhandled!\n"); 399 if (perf_data__is_pipe(session->data)) 400 skipn(perf_data__fd(session->data), event->auxtrace.size); 401 return event->auxtrace.size; 402 } 403 404 static int process_event_op2_stub(struct perf_session *session __maybe_unused, 405 union perf_event *event __maybe_unused) 406 { 407 dump_printf(": unhandled!\n"); 408 return 0; 409 } 410 411 412 static 413 int process_event_thread_map_stub(struct perf_session *session __maybe_unused, 414 union perf_event *event __maybe_unused) 415 { 416 if (dump_trace) 417 perf_event__fprintf_thread_map(event, stdout); 418 419 dump_printf(": unhandled!\n"); 420 return 0; 421 } 422 423 static 424 int process_event_cpu_map_stub(struct perf_session *session __maybe_unused, 425 union perf_event *event __maybe_unused) 426 { 427 if (dump_trace) 428 perf_event__fprintf_cpu_map(event, stdout); 429 430 dump_printf(": unhandled!\n"); 431 return 0; 432 } 433 434 static 435 int process_event_stat_config_stub(struct perf_session *session __maybe_unused, 436 union perf_event *event __maybe_unused) 437 { 438 if (dump_trace) 439 perf_event__fprintf_stat_config(event, stdout); 440 441 dump_printf(": unhandled!\n"); 442 return 0; 443 } 444 445 static int process_stat_stub(struct perf_session *perf_session __maybe_unused, 446 union perf_event *event) 447 { 448 if (dump_trace) 449 perf_event__fprintf_stat(event, stdout); 450 451 dump_printf(": unhandled!\n"); 452 return 0; 453 } 454 455 static int process_stat_round_stub(struct perf_session *perf_session __maybe_unused, 456 union perf_event *event) 457 { 458 if (dump_trace) 459 perf_event__fprintf_stat_round(event, stdout); 460 461 dump_printf(": unhandled!\n"); 462 return 0; 463 } 464 465 static int process_event_time_conv_stub(struct perf_session *perf_session __maybe_unused, 466 union perf_event *event) 467 { 468 if (dump_trace) 469 perf_event__fprintf_time_conv(event, stdout); 470 471 dump_printf(": unhandled!\n"); 472 return 0; 473 } 474 475 static int perf_session__process_compressed_event_stub(struct perf_session *session __maybe_unused, 476 union perf_event *event __maybe_unused, 477 u64 file_offset __maybe_unused, 478 const char *file_path __maybe_unused) 479 { 480 dump_printf(": unhandled!\n"); 481 return 0; 482 } 483 484 void perf_tool__fill_defaults(struct perf_tool *tool) 485 { 486 if (tool->sample == NULL) 487 tool->sample = process_event_sample_stub; 488 if (tool->mmap == NULL) 489 tool->mmap = process_event_stub; 490 if (tool->mmap2 == NULL) 491 tool->mmap2 = process_event_stub; 492 if (tool->comm == NULL) 493 tool->comm = process_event_stub; 494 if (tool->namespaces == NULL) 495 tool->namespaces = process_event_stub; 496 if (tool->cgroup == NULL) 497 tool->cgroup = process_event_stub; 498 if (tool->fork == NULL) 499 tool->fork = process_event_stub; 500 if (tool->exit == NULL) 501 tool->exit = process_event_stub; 502 if (tool->lost == NULL) 503 tool->lost = perf_event__process_lost; 504 if (tool->lost_samples == NULL) 505 tool->lost_samples = perf_event__process_lost_samples; 506 if (tool->aux == NULL) 507 tool->aux = perf_event__process_aux; 508 if (tool->itrace_start == NULL) 509 tool->itrace_start = perf_event__process_itrace_start; 510 if (tool->context_switch == NULL) 511 tool->context_switch = perf_event__process_switch; 512 if (tool->ksymbol == NULL) 513 tool->ksymbol = perf_event__process_ksymbol; 514 if (tool->bpf == NULL) 515 tool->bpf = perf_event__process_bpf; 516 if (tool->text_poke == NULL) 517 tool->text_poke = perf_event__process_text_poke; 518 if (tool->aux_output_hw_id == NULL) 519 tool->aux_output_hw_id = perf_event__process_aux_output_hw_id; 520 if (tool->read == NULL) 521 tool->read = process_event_sample_stub; 522 if (tool->throttle == NULL) 523 tool->throttle = process_event_stub; 524 if (tool->unthrottle == NULL) 525 tool->unthrottle = process_event_stub; 526 if (tool->attr == NULL) 527 tool->attr = process_event_synth_attr_stub; 528 if (tool->event_update == NULL) 529 tool->event_update = process_event_synth_event_update_stub; 530 if (tool->tracing_data == NULL) 531 tool->tracing_data = process_event_synth_tracing_data_stub; 532 if (tool->build_id == NULL) 533 tool->build_id = process_event_op2_stub; 534 if (tool->finished_round == NULL) { 535 if (tool->ordered_events) 536 tool->finished_round = perf_event__process_finished_round; 537 else 538 tool->finished_round = process_finished_round_stub; 539 } 540 if (tool->id_index == NULL) 541 tool->id_index = process_event_op2_stub; 542 if (tool->auxtrace_info == NULL) 543 tool->auxtrace_info = process_event_op2_stub; 544 if (tool->auxtrace == NULL) 545 tool->auxtrace = process_event_auxtrace_stub; 546 if (tool->auxtrace_error == NULL) 547 tool->auxtrace_error = process_event_op2_stub; 548 if (tool->thread_map == NULL) 549 tool->thread_map = process_event_thread_map_stub; 550 if (tool->cpu_map == NULL) 551 tool->cpu_map = process_event_cpu_map_stub; 552 if (tool->stat_config == NULL) 553 tool->stat_config = process_event_stat_config_stub; 554 if (tool->stat == NULL) 555 tool->stat = process_stat_stub; 556 if (tool->stat_round == NULL) 557 tool->stat_round = process_stat_round_stub; 558 if (tool->time_conv == NULL) 559 tool->time_conv = process_event_time_conv_stub; 560 if (tool->feature == NULL) 561 tool->feature = process_event_op2_stub; 562 if (tool->compressed == NULL) 563 tool->compressed = perf_session__process_compressed_event; 564 if (tool->finished_init == NULL) 565 tool->finished_init = process_event_op2_stub; 566 } 567 568 static void swap_sample_id_all(union perf_event *event, void *data) 569 { 570 void *end = (void *) event + event->header.size; 571 int size = end - data; 572 573 BUG_ON(size % sizeof(u64)); 574 mem_bswap_64(data, size); 575 } 576 577 static void perf_event__all64_swap(union perf_event *event, 578 bool sample_id_all __maybe_unused) 579 { 580 struct perf_event_header *hdr = &event->header; 581 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 582 } 583 584 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 585 { 586 event->comm.pid = bswap_32(event->comm.pid); 587 event->comm.tid = bswap_32(event->comm.tid); 588 589 if (sample_id_all) { 590 void *data = &event->comm.comm; 591 592 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 593 swap_sample_id_all(event, data); 594 } 595 } 596 597 static void perf_event__mmap_swap(union perf_event *event, 598 bool sample_id_all) 599 { 600 event->mmap.pid = bswap_32(event->mmap.pid); 601 event->mmap.tid = bswap_32(event->mmap.tid); 602 event->mmap.start = bswap_64(event->mmap.start); 603 event->mmap.len = bswap_64(event->mmap.len); 604 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 605 606 if (sample_id_all) { 607 void *data = &event->mmap.filename; 608 609 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 610 swap_sample_id_all(event, data); 611 } 612 } 613 614 static void perf_event__mmap2_swap(union perf_event *event, 615 bool sample_id_all) 616 { 617 event->mmap2.pid = bswap_32(event->mmap2.pid); 618 event->mmap2.tid = bswap_32(event->mmap2.tid); 619 event->mmap2.start = bswap_64(event->mmap2.start); 620 event->mmap2.len = bswap_64(event->mmap2.len); 621 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); 622 623 if (!(event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID)) { 624 event->mmap2.maj = bswap_32(event->mmap2.maj); 625 event->mmap2.min = bswap_32(event->mmap2.min); 626 event->mmap2.ino = bswap_64(event->mmap2.ino); 627 event->mmap2.ino_generation = bswap_64(event->mmap2.ino_generation); 628 } 629 630 if (sample_id_all) { 631 void *data = &event->mmap2.filename; 632 633 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 634 swap_sample_id_all(event, data); 635 } 636 } 637 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 638 { 639 event->fork.pid = bswap_32(event->fork.pid); 640 event->fork.tid = bswap_32(event->fork.tid); 641 event->fork.ppid = bswap_32(event->fork.ppid); 642 event->fork.ptid = bswap_32(event->fork.ptid); 643 event->fork.time = bswap_64(event->fork.time); 644 645 if (sample_id_all) 646 swap_sample_id_all(event, &event->fork + 1); 647 } 648 649 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 650 { 651 event->read.pid = bswap_32(event->read.pid); 652 event->read.tid = bswap_32(event->read.tid); 653 event->read.value = bswap_64(event->read.value); 654 event->read.time_enabled = bswap_64(event->read.time_enabled); 655 event->read.time_running = bswap_64(event->read.time_running); 656 event->read.id = bswap_64(event->read.id); 657 658 if (sample_id_all) 659 swap_sample_id_all(event, &event->read + 1); 660 } 661 662 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all) 663 { 664 event->aux.aux_offset = bswap_64(event->aux.aux_offset); 665 event->aux.aux_size = bswap_64(event->aux.aux_size); 666 event->aux.flags = bswap_64(event->aux.flags); 667 668 if (sample_id_all) 669 swap_sample_id_all(event, &event->aux + 1); 670 } 671 672 static void perf_event__itrace_start_swap(union perf_event *event, 673 bool sample_id_all) 674 { 675 event->itrace_start.pid = bswap_32(event->itrace_start.pid); 676 event->itrace_start.tid = bswap_32(event->itrace_start.tid); 677 678 if (sample_id_all) 679 swap_sample_id_all(event, &event->itrace_start + 1); 680 } 681 682 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all) 683 { 684 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) { 685 event->context_switch.next_prev_pid = 686 bswap_32(event->context_switch.next_prev_pid); 687 event->context_switch.next_prev_tid = 688 bswap_32(event->context_switch.next_prev_tid); 689 } 690 691 if (sample_id_all) 692 swap_sample_id_all(event, &event->context_switch + 1); 693 } 694 695 static void perf_event__text_poke_swap(union perf_event *event, bool sample_id_all) 696 { 697 event->text_poke.addr = bswap_64(event->text_poke.addr); 698 event->text_poke.old_len = bswap_16(event->text_poke.old_len); 699 event->text_poke.new_len = bswap_16(event->text_poke.new_len); 700 701 if (sample_id_all) { 702 size_t len = sizeof(event->text_poke.old_len) + 703 sizeof(event->text_poke.new_len) + 704 event->text_poke.old_len + 705 event->text_poke.new_len; 706 void *data = &event->text_poke.old_len; 707 708 data += PERF_ALIGN(len, sizeof(u64)); 709 swap_sample_id_all(event, data); 710 } 711 } 712 713 static void perf_event__throttle_swap(union perf_event *event, 714 bool sample_id_all) 715 { 716 event->throttle.time = bswap_64(event->throttle.time); 717 event->throttle.id = bswap_64(event->throttle.id); 718 event->throttle.stream_id = bswap_64(event->throttle.stream_id); 719 720 if (sample_id_all) 721 swap_sample_id_all(event, &event->throttle + 1); 722 } 723 724 static void perf_event__namespaces_swap(union perf_event *event, 725 bool sample_id_all) 726 { 727 u64 i; 728 729 event->namespaces.pid = bswap_32(event->namespaces.pid); 730 event->namespaces.tid = bswap_32(event->namespaces.tid); 731 event->namespaces.nr_namespaces = bswap_64(event->namespaces.nr_namespaces); 732 733 for (i = 0; i < event->namespaces.nr_namespaces; i++) { 734 struct perf_ns_link_info *ns = &event->namespaces.link_info[i]; 735 736 ns->dev = bswap_64(ns->dev); 737 ns->ino = bswap_64(ns->ino); 738 } 739 740 if (sample_id_all) 741 swap_sample_id_all(event, &event->namespaces.link_info[i]); 742 } 743 744 static void perf_event__cgroup_swap(union perf_event *event, bool sample_id_all) 745 { 746 event->cgroup.id = bswap_64(event->cgroup.id); 747 748 if (sample_id_all) { 749 void *data = &event->cgroup.path; 750 751 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 752 swap_sample_id_all(event, data); 753 } 754 } 755 756 static u8 revbyte(u8 b) 757 { 758 int rev = (b >> 4) | ((b & 0xf) << 4); 759 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 760 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 761 return (u8) rev; 762 } 763 764 /* 765 * XXX this is hack in attempt to carry flags bitfield 766 * through endian village. ABI says: 767 * 768 * Bit-fields are allocated from right to left (least to most significant) 769 * on little-endian implementations and from left to right (most to least 770 * significant) on big-endian implementations. 771 * 772 * The above seems to be byte specific, so we need to reverse each 773 * byte of the bitfield. 'Internet' also says this might be implementation 774 * specific and we probably need proper fix and carry perf_event_attr 775 * bitfield flags in separate data file FEAT_ section. Thought this seems 776 * to work for now. 777 */ 778 static void swap_bitfield(u8 *p, unsigned len) 779 { 780 unsigned i; 781 782 for (i = 0; i < len; i++) { 783 *p = revbyte(*p); 784 p++; 785 } 786 } 787 788 /* exported for swapping attributes in file header */ 789 void perf_event__attr_swap(struct perf_event_attr *attr) 790 { 791 attr->type = bswap_32(attr->type); 792 attr->size = bswap_32(attr->size); 793 794 #define bswap_safe(f, n) \ 795 (attr->size > (offsetof(struct perf_event_attr, f) + \ 796 sizeof(attr->f) * (n))) 797 #define bswap_field(f, sz) \ 798 do { \ 799 if (bswap_safe(f, 0)) \ 800 attr->f = bswap_##sz(attr->f); \ 801 } while(0) 802 #define bswap_field_16(f) bswap_field(f, 16) 803 #define bswap_field_32(f) bswap_field(f, 32) 804 #define bswap_field_64(f) bswap_field(f, 64) 805 806 bswap_field_64(config); 807 bswap_field_64(sample_period); 808 bswap_field_64(sample_type); 809 bswap_field_64(read_format); 810 bswap_field_32(wakeup_events); 811 bswap_field_32(bp_type); 812 bswap_field_64(bp_addr); 813 bswap_field_64(bp_len); 814 bswap_field_64(branch_sample_type); 815 bswap_field_64(sample_regs_user); 816 bswap_field_32(sample_stack_user); 817 bswap_field_32(aux_watermark); 818 bswap_field_16(sample_max_stack); 819 bswap_field_32(aux_sample_size); 820 821 /* 822 * After read_format are bitfields. Check read_format because 823 * we are unable to use offsetof on bitfield. 824 */ 825 if (bswap_safe(read_format, 1)) 826 swap_bitfield((u8 *) (&attr->read_format + 1), 827 sizeof(u64)); 828 #undef bswap_field_64 829 #undef bswap_field_32 830 #undef bswap_field 831 #undef bswap_safe 832 } 833 834 static void perf_event__hdr_attr_swap(union perf_event *event, 835 bool sample_id_all __maybe_unused) 836 { 837 size_t size; 838 839 perf_event__attr_swap(&event->attr.attr); 840 841 size = event->header.size; 842 size -= (void *)&event->attr.id - (void *)event; 843 mem_bswap_64(event->attr.id, size); 844 } 845 846 static void perf_event__event_update_swap(union perf_event *event, 847 bool sample_id_all __maybe_unused) 848 { 849 event->event_update.type = bswap_64(event->event_update.type); 850 event->event_update.id = bswap_64(event->event_update.id); 851 } 852 853 static void perf_event__event_type_swap(union perf_event *event, 854 bool sample_id_all __maybe_unused) 855 { 856 event->event_type.event_type.event_id = 857 bswap_64(event->event_type.event_type.event_id); 858 } 859 860 static void perf_event__tracing_data_swap(union perf_event *event, 861 bool sample_id_all __maybe_unused) 862 { 863 event->tracing_data.size = bswap_32(event->tracing_data.size); 864 } 865 866 static void perf_event__auxtrace_info_swap(union perf_event *event, 867 bool sample_id_all __maybe_unused) 868 { 869 size_t size; 870 871 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type); 872 873 size = event->header.size; 874 size -= (void *)&event->auxtrace_info.priv - (void *)event; 875 mem_bswap_64(event->auxtrace_info.priv, size); 876 } 877 878 static void perf_event__auxtrace_swap(union perf_event *event, 879 bool sample_id_all __maybe_unused) 880 { 881 event->auxtrace.size = bswap_64(event->auxtrace.size); 882 event->auxtrace.offset = bswap_64(event->auxtrace.offset); 883 event->auxtrace.reference = bswap_64(event->auxtrace.reference); 884 event->auxtrace.idx = bswap_32(event->auxtrace.idx); 885 event->auxtrace.tid = bswap_32(event->auxtrace.tid); 886 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu); 887 } 888 889 static void perf_event__auxtrace_error_swap(union perf_event *event, 890 bool sample_id_all __maybe_unused) 891 { 892 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type); 893 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code); 894 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu); 895 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid); 896 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid); 897 event->auxtrace_error.fmt = bswap_32(event->auxtrace_error.fmt); 898 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip); 899 if (event->auxtrace_error.fmt) 900 event->auxtrace_error.time = bswap_64(event->auxtrace_error.time); 901 if (event->auxtrace_error.fmt >= 2) { 902 event->auxtrace_error.machine_pid = bswap_32(event->auxtrace_error.machine_pid); 903 event->auxtrace_error.vcpu = bswap_32(event->auxtrace_error.vcpu); 904 } 905 } 906 907 static void perf_event__thread_map_swap(union perf_event *event, 908 bool sample_id_all __maybe_unused) 909 { 910 unsigned i; 911 912 event->thread_map.nr = bswap_64(event->thread_map.nr); 913 914 for (i = 0; i < event->thread_map.nr; i++) 915 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid); 916 } 917 918 static void perf_event__cpu_map_swap(union perf_event *event, 919 bool sample_id_all __maybe_unused) 920 { 921 struct perf_record_cpu_map_data *data = &event->cpu_map.data; 922 923 data->type = bswap_16(data->type); 924 925 switch (data->type) { 926 case PERF_CPU_MAP__CPUS: 927 data->cpus_data.nr = bswap_16(data->cpus_data.nr); 928 929 for (unsigned i = 0; i < data->cpus_data.nr; i++) 930 data->cpus_data.cpu[i] = bswap_16(data->cpus_data.cpu[i]); 931 break; 932 case PERF_CPU_MAP__MASK: 933 data->mask32_data.long_size = bswap_16(data->mask32_data.long_size); 934 935 switch (data->mask32_data.long_size) { 936 case 4: 937 data->mask32_data.nr = bswap_16(data->mask32_data.nr); 938 for (unsigned i = 0; i < data->mask32_data.nr; i++) 939 data->mask32_data.mask[i] = bswap_32(data->mask32_data.mask[i]); 940 break; 941 case 8: 942 data->mask64_data.nr = bswap_16(data->mask64_data.nr); 943 for (unsigned i = 0; i < data->mask64_data.nr; i++) 944 data->mask64_data.mask[i] = bswap_64(data->mask64_data.mask[i]); 945 break; 946 default: 947 pr_err("cpu_map swap: unsupported long size\n"); 948 } 949 break; 950 case PERF_CPU_MAP__RANGE_CPUS: 951 data->range_cpu_data.start_cpu = bswap_16(data->range_cpu_data.start_cpu); 952 data->range_cpu_data.end_cpu = bswap_16(data->range_cpu_data.end_cpu); 953 break; 954 default: 955 break; 956 } 957 } 958 959 static void perf_event__stat_config_swap(union perf_event *event, 960 bool sample_id_all __maybe_unused) 961 { 962 u64 size; 963 964 size = bswap_64(event->stat_config.nr) * sizeof(event->stat_config.data[0]); 965 size += 1; /* nr item itself */ 966 mem_bswap_64(&event->stat_config.nr, size); 967 } 968 969 static void perf_event__stat_swap(union perf_event *event, 970 bool sample_id_all __maybe_unused) 971 { 972 event->stat.id = bswap_64(event->stat.id); 973 event->stat.thread = bswap_32(event->stat.thread); 974 event->stat.cpu = bswap_32(event->stat.cpu); 975 event->stat.val = bswap_64(event->stat.val); 976 event->stat.ena = bswap_64(event->stat.ena); 977 event->stat.run = bswap_64(event->stat.run); 978 } 979 980 static void perf_event__stat_round_swap(union perf_event *event, 981 bool sample_id_all __maybe_unused) 982 { 983 event->stat_round.type = bswap_64(event->stat_round.type); 984 event->stat_round.time = bswap_64(event->stat_round.time); 985 } 986 987 static void perf_event__time_conv_swap(union perf_event *event, 988 bool sample_id_all __maybe_unused) 989 { 990 event->time_conv.time_shift = bswap_64(event->time_conv.time_shift); 991 event->time_conv.time_mult = bswap_64(event->time_conv.time_mult); 992 event->time_conv.time_zero = bswap_64(event->time_conv.time_zero); 993 994 if (event_contains(event->time_conv, time_cycles)) { 995 event->time_conv.time_cycles = bswap_64(event->time_conv.time_cycles); 996 event->time_conv.time_mask = bswap_64(event->time_conv.time_mask); 997 } 998 } 999 1000 typedef void (*perf_event__swap_op)(union perf_event *event, 1001 bool sample_id_all); 1002 1003 static perf_event__swap_op perf_event__swap_ops[] = { 1004 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 1005 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap, 1006 [PERF_RECORD_COMM] = perf_event__comm_swap, 1007 [PERF_RECORD_FORK] = perf_event__task_swap, 1008 [PERF_RECORD_EXIT] = perf_event__task_swap, 1009 [PERF_RECORD_LOST] = perf_event__all64_swap, 1010 [PERF_RECORD_READ] = perf_event__read_swap, 1011 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap, 1012 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap, 1013 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 1014 [PERF_RECORD_AUX] = perf_event__aux_swap, 1015 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap, 1016 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap, 1017 [PERF_RECORD_SWITCH] = perf_event__switch_swap, 1018 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap, 1019 [PERF_RECORD_NAMESPACES] = perf_event__namespaces_swap, 1020 [PERF_RECORD_CGROUP] = perf_event__cgroup_swap, 1021 [PERF_RECORD_TEXT_POKE] = perf_event__text_poke_swap, 1022 [PERF_RECORD_AUX_OUTPUT_HW_ID] = perf_event__all64_swap, 1023 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 1024 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 1025 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 1026 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 1027 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap, 1028 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap, 1029 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap, 1030 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap, 1031 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap, 1032 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap, 1033 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap, 1034 [PERF_RECORD_STAT] = perf_event__stat_swap, 1035 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap, 1036 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap, 1037 [PERF_RECORD_TIME_CONV] = perf_event__time_conv_swap, 1038 [PERF_RECORD_HEADER_MAX] = NULL, 1039 }; 1040 1041 /* 1042 * When perf record finishes a pass on every buffers, it records this pseudo 1043 * event. 1044 * We record the max timestamp t found in the pass n. 1045 * Assuming these timestamps are monotonic across cpus, we know that if 1046 * a buffer still has events with timestamps below t, they will be all 1047 * available and then read in the pass n + 1. 1048 * Hence when we start to read the pass n + 2, we can safely flush every 1049 * events with timestamps below t. 1050 * 1051 * ============ PASS n ================= 1052 * CPU 0 | CPU 1 1053 * | 1054 * cnt1 timestamps | cnt2 timestamps 1055 * 1 | 2 1056 * 2 | 3 1057 * - | 4 <--- max recorded 1058 * 1059 * ============ PASS n + 1 ============== 1060 * CPU 0 | CPU 1 1061 * | 1062 * cnt1 timestamps | cnt2 timestamps 1063 * 3 | 5 1064 * 4 | 6 1065 * 5 | 7 <---- max recorded 1066 * 1067 * Flush every events below timestamp 4 1068 * 1069 * ============ PASS n + 2 ============== 1070 * CPU 0 | CPU 1 1071 * | 1072 * cnt1 timestamps | cnt2 timestamps 1073 * 6 | 8 1074 * 7 | 9 1075 * - | 10 1076 * 1077 * Flush every events below timestamp 7 1078 * etc... 1079 */ 1080 int perf_event__process_finished_round(struct perf_tool *tool __maybe_unused, 1081 union perf_event *event __maybe_unused, 1082 struct ordered_events *oe) 1083 { 1084 if (dump_trace) 1085 fprintf(stdout, "\n"); 1086 return ordered_events__flush(oe, OE_FLUSH__ROUND); 1087 } 1088 1089 int perf_session__queue_event(struct perf_session *s, union perf_event *event, 1090 u64 timestamp, u64 file_offset, const char *file_path) 1091 { 1092 return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset, file_path); 1093 } 1094 1095 static void callchain__lbr_callstack_printf(struct perf_sample *sample) 1096 { 1097 struct ip_callchain *callchain = sample->callchain; 1098 struct branch_stack *lbr_stack = sample->branch_stack; 1099 struct branch_entry *entries = perf_sample__branch_entries(sample); 1100 u64 kernel_callchain_nr = callchain->nr; 1101 unsigned int i; 1102 1103 for (i = 0; i < kernel_callchain_nr; i++) { 1104 if (callchain->ips[i] == PERF_CONTEXT_USER) 1105 break; 1106 } 1107 1108 if ((i != kernel_callchain_nr) && lbr_stack->nr) { 1109 u64 total_nr; 1110 /* 1111 * LBR callstack can only get user call chain, 1112 * i is kernel call chain number, 1113 * 1 is PERF_CONTEXT_USER. 1114 * 1115 * The user call chain is stored in LBR registers. 1116 * LBR are pair registers. The caller is stored 1117 * in "from" register, while the callee is stored 1118 * in "to" register. 1119 * For example, there is a call stack 1120 * "A"->"B"->"C"->"D". 1121 * The LBR registers will be recorded like 1122 * "C"->"D", "B"->"C", "A"->"B". 1123 * So only the first "to" register and all "from" 1124 * registers are needed to construct the whole stack. 1125 */ 1126 total_nr = i + 1 + lbr_stack->nr + 1; 1127 kernel_callchain_nr = i + 1; 1128 1129 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr); 1130 1131 for (i = 0; i < kernel_callchain_nr; i++) 1132 printf("..... %2d: %016" PRIx64 "\n", 1133 i, callchain->ips[i]); 1134 1135 printf("..... %2d: %016" PRIx64 "\n", 1136 (int)(kernel_callchain_nr), entries[0].to); 1137 for (i = 0; i < lbr_stack->nr; i++) 1138 printf("..... %2d: %016" PRIx64 "\n", 1139 (int)(i + kernel_callchain_nr + 1), entries[i].from); 1140 } 1141 } 1142 1143 static void callchain__printf(struct evsel *evsel, 1144 struct perf_sample *sample) 1145 { 1146 unsigned int i; 1147 struct ip_callchain *callchain = sample->callchain; 1148 1149 if (evsel__has_branch_callstack(evsel)) 1150 callchain__lbr_callstack_printf(sample); 1151 1152 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr); 1153 1154 for (i = 0; i < callchain->nr; i++) 1155 printf("..... %2d: %016" PRIx64 "\n", 1156 i, callchain->ips[i]); 1157 } 1158 1159 static void branch_stack__printf(struct perf_sample *sample, bool callstack) 1160 { 1161 struct branch_entry *entries = perf_sample__branch_entries(sample); 1162 uint64_t i; 1163 1164 if (!callstack) { 1165 printf("%s: nr:%" PRIu64 "\n", "... branch stack", sample->branch_stack->nr); 1166 } else { 1167 /* the reason of adding 1 to nr is because after expanding 1168 * branch stack it generates nr + 1 callstack records. e.g., 1169 * B()->C() 1170 * A()->B() 1171 * the final callstack should be: 1172 * C() 1173 * B() 1174 * A() 1175 */ 1176 printf("%s: nr:%" PRIu64 "\n", "... branch callstack", sample->branch_stack->nr+1); 1177 } 1178 1179 for (i = 0; i < sample->branch_stack->nr; i++) { 1180 struct branch_entry *e = &entries[i]; 1181 1182 if (!callstack) { 1183 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x %s %s\n", 1184 i, e->from, e->to, 1185 (unsigned short)e->flags.cycles, 1186 e->flags.mispred ? "M" : " ", 1187 e->flags.predicted ? "P" : " ", 1188 e->flags.abort ? "A" : " ", 1189 e->flags.in_tx ? "T" : " ", 1190 (unsigned)e->flags.reserved, 1191 get_branch_type(e), 1192 e->flags.spec ? branch_spec_desc(e->flags.spec) : ""); 1193 } else { 1194 if (i == 0) { 1195 printf("..... %2"PRIu64": %016" PRIx64 "\n" 1196 "..... %2"PRIu64": %016" PRIx64 "\n", 1197 i, e->to, i+1, e->from); 1198 } else { 1199 printf("..... %2"PRIu64": %016" PRIx64 "\n", i+1, e->from); 1200 } 1201 } 1202 } 1203 } 1204 1205 static void regs_dump__printf(u64 mask, u64 *regs, const char *arch) 1206 { 1207 unsigned rid, i = 0; 1208 1209 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { 1210 u64 val = regs[i++]; 1211 1212 printf(".... %-5s 0x%016" PRIx64 "\n", 1213 perf_reg_name(rid, arch), val); 1214 } 1215 } 1216 1217 static const char *regs_abi[] = { 1218 [PERF_SAMPLE_REGS_ABI_NONE] = "none", 1219 [PERF_SAMPLE_REGS_ABI_32] = "32-bit", 1220 [PERF_SAMPLE_REGS_ABI_64] = "64-bit", 1221 }; 1222 1223 static inline const char *regs_dump_abi(struct regs_dump *d) 1224 { 1225 if (d->abi > PERF_SAMPLE_REGS_ABI_64) 1226 return "unknown"; 1227 1228 return regs_abi[d->abi]; 1229 } 1230 1231 static void regs__printf(const char *type, struct regs_dump *regs, const char *arch) 1232 { 1233 u64 mask = regs->mask; 1234 1235 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n", 1236 type, 1237 mask, 1238 regs_dump_abi(regs)); 1239 1240 regs_dump__printf(mask, regs->regs, arch); 1241 } 1242 1243 static void regs_user__printf(struct perf_sample *sample, const char *arch) 1244 { 1245 struct regs_dump *user_regs = &sample->user_regs; 1246 1247 if (user_regs->regs) 1248 regs__printf("user", user_regs, arch); 1249 } 1250 1251 static void regs_intr__printf(struct perf_sample *sample, const char *arch) 1252 { 1253 struct regs_dump *intr_regs = &sample->intr_regs; 1254 1255 if (intr_regs->regs) 1256 regs__printf("intr", intr_regs, arch); 1257 } 1258 1259 static void stack_user__printf(struct stack_dump *dump) 1260 { 1261 printf("... ustack: size %" PRIu64 ", offset 0x%x\n", 1262 dump->size, dump->offset); 1263 } 1264 1265 static void evlist__print_tstamp(struct evlist *evlist, union perf_event *event, struct perf_sample *sample) 1266 { 1267 u64 sample_type = __evlist__combined_sample_type(evlist); 1268 1269 if (event->header.type != PERF_RECORD_SAMPLE && 1270 !evlist__sample_id_all(evlist)) { 1271 fputs("-1 -1 ", stdout); 1272 return; 1273 } 1274 1275 if ((sample_type & PERF_SAMPLE_CPU)) 1276 printf("%u ", sample->cpu); 1277 1278 if (sample_type & PERF_SAMPLE_TIME) 1279 printf("%" PRIu64 " ", sample->time); 1280 } 1281 1282 static void sample_read__printf(struct perf_sample *sample, u64 read_format) 1283 { 1284 printf("... sample_read:\n"); 1285 1286 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1287 printf("...... time enabled %016" PRIx64 "\n", 1288 sample->read.time_enabled); 1289 1290 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1291 printf("...... time running %016" PRIx64 "\n", 1292 sample->read.time_running); 1293 1294 if (read_format & PERF_FORMAT_GROUP) { 1295 struct sample_read_value *value = sample->read.group.values; 1296 1297 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr); 1298 1299 sample_read_group__for_each(value, sample->read.group.nr, read_format) { 1300 printf("..... id %016" PRIx64 1301 ", value %016" PRIx64, 1302 value->id, value->value); 1303 if (read_format & PERF_FORMAT_LOST) 1304 printf(", lost %" PRIu64, value->lost); 1305 printf("\n"); 1306 } 1307 } else { 1308 printf("..... id %016" PRIx64 ", value %016" PRIx64, 1309 sample->read.one.id, sample->read.one.value); 1310 if (read_format & PERF_FORMAT_LOST) 1311 printf(", lost %" PRIu64, sample->read.one.lost); 1312 printf("\n"); 1313 } 1314 } 1315 1316 static void dump_event(struct evlist *evlist, union perf_event *event, 1317 u64 file_offset, struct perf_sample *sample, 1318 const char *file_path) 1319 { 1320 if (!dump_trace) 1321 return; 1322 1323 printf("\n%#" PRIx64 "@%s [%#x]: event: %d\n", 1324 file_offset, file_path, event->header.size, event->header.type); 1325 1326 trace_event(event); 1327 if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw) 1328 evlist->trace_event_sample_raw(evlist, event, sample); 1329 1330 if (sample) 1331 evlist__print_tstamp(evlist, event, sample); 1332 1333 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 1334 event->header.size, perf_event__name(event->header.type)); 1335 } 1336 1337 char *get_page_size_name(u64 size, char *str) 1338 { 1339 if (!size || !unit_number__scnprintf(str, PAGE_SIZE_NAME_LEN, size)) 1340 snprintf(str, PAGE_SIZE_NAME_LEN, "%s", "N/A"); 1341 1342 return str; 1343 } 1344 1345 static void dump_sample(struct evsel *evsel, union perf_event *event, 1346 struct perf_sample *sample, const char *arch) 1347 { 1348 u64 sample_type; 1349 char str[PAGE_SIZE_NAME_LEN]; 1350 1351 if (!dump_trace) 1352 return; 1353 1354 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 1355 event->header.misc, sample->pid, sample->tid, sample->ip, 1356 sample->period, sample->addr); 1357 1358 sample_type = evsel->core.attr.sample_type; 1359 1360 if (evsel__has_callchain(evsel)) 1361 callchain__printf(evsel, sample); 1362 1363 if (evsel__has_br_stack(evsel)) 1364 branch_stack__printf(sample, evsel__has_branch_callstack(evsel)); 1365 1366 if (sample_type & PERF_SAMPLE_REGS_USER) 1367 regs_user__printf(sample, arch); 1368 1369 if (sample_type & PERF_SAMPLE_REGS_INTR) 1370 regs_intr__printf(sample, arch); 1371 1372 if (sample_type & PERF_SAMPLE_STACK_USER) 1373 stack_user__printf(&sample->user_stack); 1374 1375 if (sample_type & PERF_SAMPLE_WEIGHT_TYPE) { 1376 printf("... weight: %" PRIu64 "", sample->weight); 1377 if (sample_type & PERF_SAMPLE_WEIGHT_STRUCT) { 1378 printf(",0x%"PRIx16"", sample->ins_lat); 1379 printf(",0x%"PRIx16"", sample->p_stage_cyc); 1380 } 1381 printf("\n"); 1382 } 1383 1384 if (sample_type & PERF_SAMPLE_DATA_SRC) 1385 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src); 1386 1387 if (sample_type & PERF_SAMPLE_PHYS_ADDR) 1388 printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr); 1389 1390 if (sample_type & PERF_SAMPLE_DATA_PAGE_SIZE) 1391 printf(" .. data page size: %s\n", get_page_size_name(sample->data_page_size, str)); 1392 1393 if (sample_type & PERF_SAMPLE_CODE_PAGE_SIZE) 1394 printf(" .. code page size: %s\n", get_page_size_name(sample->code_page_size, str)); 1395 1396 if (sample_type & PERF_SAMPLE_TRANSACTION) 1397 printf("... transaction: %" PRIx64 "\n", sample->transaction); 1398 1399 if (sample_type & PERF_SAMPLE_READ) 1400 sample_read__printf(sample, evsel->core.attr.read_format); 1401 } 1402 1403 static void dump_read(struct evsel *evsel, union perf_event *event) 1404 { 1405 struct perf_record_read *read_event = &event->read; 1406 u64 read_format; 1407 1408 if (!dump_trace) 1409 return; 1410 1411 printf(": %d %d %s %" PRI_lu64 "\n", event->read.pid, event->read.tid, 1412 evsel__name(evsel), event->read.value); 1413 1414 if (!evsel) 1415 return; 1416 1417 read_format = evsel->core.attr.read_format; 1418 1419 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1420 printf("... time enabled : %" PRI_lu64 "\n", read_event->time_enabled); 1421 1422 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1423 printf("... time running : %" PRI_lu64 "\n", read_event->time_running); 1424 1425 if (read_format & PERF_FORMAT_ID) 1426 printf("... id : %" PRI_lu64 "\n", read_event->id); 1427 1428 if (read_format & PERF_FORMAT_LOST) 1429 printf("... lost : %" PRI_lu64 "\n", read_event->lost); 1430 } 1431 1432 static struct machine *machines__find_for_cpumode(struct machines *machines, 1433 union perf_event *event, 1434 struct perf_sample *sample) 1435 { 1436 if (perf_guest && 1437 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 1438 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) { 1439 u32 pid; 1440 1441 if (sample->machine_pid) 1442 pid = sample->machine_pid; 1443 else if (event->header.type == PERF_RECORD_MMAP 1444 || event->header.type == PERF_RECORD_MMAP2) 1445 pid = event->mmap.pid; 1446 else 1447 pid = sample->pid; 1448 1449 /* 1450 * Guest code machine is created as needed and does not use 1451 * DEFAULT_GUEST_KERNEL_ID. 1452 */ 1453 if (symbol_conf.guest_code) 1454 return machines__findnew(machines, pid); 1455 1456 return machines__find_guest(machines, pid); 1457 } 1458 1459 return &machines->host; 1460 } 1461 1462 static int deliver_sample_value(struct evlist *evlist, 1463 struct perf_tool *tool, 1464 union perf_event *event, 1465 struct perf_sample *sample, 1466 struct sample_read_value *v, 1467 struct machine *machine) 1468 { 1469 struct perf_sample_id *sid = evlist__id2sid(evlist, v->id); 1470 struct evsel *evsel; 1471 1472 if (sid) { 1473 sample->id = v->id; 1474 sample->period = v->value - sid->period; 1475 sid->period = v->value; 1476 } 1477 1478 if (!sid || sid->evsel == NULL) { 1479 ++evlist->stats.nr_unknown_id; 1480 return 0; 1481 } 1482 1483 /* 1484 * There's no reason to deliver sample 1485 * for zero period, bail out. 1486 */ 1487 if (!sample->period) 1488 return 0; 1489 1490 evsel = container_of(sid->evsel, struct evsel, core); 1491 return tool->sample(tool, event, sample, evsel, machine); 1492 } 1493 1494 static int deliver_sample_group(struct evlist *evlist, 1495 struct perf_tool *tool, 1496 union perf_event *event, 1497 struct perf_sample *sample, 1498 struct machine *machine, 1499 u64 read_format) 1500 { 1501 int ret = -EINVAL; 1502 struct sample_read_value *v = sample->read.group.values; 1503 1504 sample_read_group__for_each(v, sample->read.group.nr, read_format) { 1505 ret = deliver_sample_value(evlist, tool, event, sample, v, 1506 machine); 1507 if (ret) 1508 break; 1509 } 1510 1511 return ret; 1512 } 1513 1514 static int evlist__deliver_sample(struct evlist *evlist, struct perf_tool *tool, 1515 union perf_event *event, struct perf_sample *sample, 1516 struct evsel *evsel, struct machine *machine) 1517 { 1518 /* We know evsel != NULL. */ 1519 u64 sample_type = evsel->core.attr.sample_type; 1520 u64 read_format = evsel->core.attr.read_format; 1521 1522 /* Standard sample delivery. */ 1523 if (!(sample_type & PERF_SAMPLE_READ)) 1524 return tool->sample(tool, event, sample, evsel, machine); 1525 1526 /* For PERF_SAMPLE_READ we have either single or group mode. */ 1527 if (read_format & PERF_FORMAT_GROUP) 1528 return deliver_sample_group(evlist, tool, event, sample, 1529 machine, read_format); 1530 else 1531 return deliver_sample_value(evlist, tool, event, sample, 1532 &sample->read.one, machine); 1533 } 1534 1535 static int machines__deliver_event(struct machines *machines, 1536 struct evlist *evlist, 1537 union perf_event *event, 1538 struct perf_sample *sample, 1539 struct perf_tool *tool, u64 file_offset, 1540 const char *file_path) 1541 { 1542 struct evsel *evsel; 1543 struct machine *machine; 1544 1545 dump_event(evlist, event, file_offset, sample, file_path); 1546 1547 evsel = evlist__id2evsel(evlist, sample->id); 1548 1549 machine = machines__find_for_cpumode(machines, event, sample); 1550 1551 switch (event->header.type) { 1552 case PERF_RECORD_SAMPLE: 1553 if (evsel == NULL) { 1554 ++evlist->stats.nr_unknown_id; 1555 return 0; 1556 } 1557 if (machine == NULL) { 1558 ++evlist->stats.nr_unprocessable_samples; 1559 dump_sample(evsel, event, sample, perf_env__arch(NULL)); 1560 return 0; 1561 } 1562 dump_sample(evsel, event, sample, perf_env__arch(machine->env)); 1563 return evlist__deliver_sample(evlist, tool, event, sample, evsel, machine); 1564 case PERF_RECORD_MMAP: 1565 return tool->mmap(tool, event, sample, machine); 1566 case PERF_RECORD_MMAP2: 1567 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT) 1568 ++evlist->stats.nr_proc_map_timeout; 1569 return tool->mmap2(tool, event, sample, machine); 1570 case PERF_RECORD_COMM: 1571 return tool->comm(tool, event, sample, machine); 1572 case PERF_RECORD_NAMESPACES: 1573 return tool->namespaces(tool, event, sample, machine); 1574 case PERF_RECORD_CGROUP: 1575 return tool->cgroup(tool, event, sample, machine); 1576 case PERF_RECORD_FORK: 1577 return tool->fork(tool, event, sample, machine); 1578 case PERF_RECORD_EXIT: 1579 return tool->exit(tool, event, sample, machine); 1580 case PERF_RECORD_LOST: 1581 if (tool->lost == perf_event__process_lost) 1582 evlist->stats.total_lost += event->lost.lost; 1583 return tool->lost(tool, event, sample, machine); 1584 case PERF_RECORD_LOST_SAMPLES: 1585 if (tool->lost_samples == perf_event__process_lost_samples) 1586 evlist->stats.total_lost_samples += event->lost_samples.lost; 1587 return tool->lost_samples(tool, event, sample, machine); 1588 case PERF_RECORD_READ: 1589 dump_read(evsel, event); 1590 return tool->read(tool, event, sample, evsel, machine); 1591 case PERF_RECORD_THROTTLE: 1592 return tool->throttle(tool, event, sample, machine); 1593 case PERF_RECORD_UNTHROTTLE: 1594 return tool->unthrottle(tool, event, sample, machine); 1595 case PERF_RECORD_AUX: 1596 if (tool->aux == perf_event__process_aux) { 1597 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) 1598 evlist->stats.total_aux_lost += 1; 1599 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL) 1600 evlist->stats.total_aux_partial += 1; 1601 if (event->aux.flags & PERF_AUX_FLAG_COLLISION) 1602 evlist->stats.total_aux_collision += 1; 1603 } 1604 return tool->aux(tool, event, sample, machine); 1605 case PERF_RECORD_ITRACE_START: 1606 return tool->itrace_start(tool, event, sample, machine); 1607 case PERF_RECORD_SWITCH: 1608 case PERF_RECORD_SWITCH_CPU_WIDE: 1609 return tool->context_switch(tool, event, sample, machine); 1610 case PERF_RECORD_KSYMBOL: 1611 return tool->ksymbol(tool, event, sample, machine); 1612 case PERF_RECORD_BPF_EVENT: 1613 return tool->bpf(tool, event, sample, machine); 1614 case PERF_RECORD_TEXT_POKE: 1615 return tool->text_poke(tool, event, sample, machine); 1616 case PERF_RECORD_AUX_OUTPUT_HW_ID: 1617 return tool->aux_output_hw_id(tool, event, sample, machine); 1618 default: 1619 ++evlist->stats.nr_unknown_events; 1620 return -1; 1621 } 1622 } 1623 1624 static int perf_session__deliver_event(struct perf_session *session, 1625 union perf_event *event, 1626 struct perf_tool *tool, 1627 u64 file_offset, 1628 const char *file_path) 1629 { 1630 struct perf_sample sample; 1631 int ret = evlist__parse_sample(session->evlist, event, &sample); 1632 1633 if (ret) { 1634 pr_err("Can't parse sample, err = %d\n", ret); 1635 return ret; 1636 } 1637 1638 ret = auxtrace__process_event(session, event, &sample, tool); 1639 if (ret < 0) 1640 return ret; 1641 if (ret > 0) 1642 return 0; 1643 1644 ret = machines__deliver_event(&session->machines, session->evlist, 1645 event, &sample, tool, file_offset, file_path); 1646 1647 if (dump_trace && sample.aux_sample.size) 1648 auxtrace__dump_auxtrace_sample(session, &sample); 1649 1650 return ret; 1651 } 1652 1653 static s64 perf_session__process_user_event(struct perf_session *session, 1654 union perf_event *event, 1655 u64 file_offset, 1656 const char *file_path) 1657 { 1658 struct ordered_events *oe = &session->ordered_events; 1659 struct perf_tool *tool = session->tool; 1660 struct perf_sample sample = { .time = 0, }; 1661 int fd = perf_data__fd(session->data); 1662 int err; 1663 1664 if (event->header.type != PERF_RECORD_COMPRESSED || 1665 tool->compressed == perf_session__process_compressed_event_stub) 1666 dump_event(session->evlist, event, file_offset, &sample, file_path); 1667 1668 /* These events are processed right away */ 1669 switch (event->header.type) { 1670 case PERF_RECORD_HEADER_ATTR: 1671 err = tool->attr(tool, event, &session->evlist); 1672 if (err == 0) { 1673 perf_session__set_id_hdr_size(session); 1674 perf_session__set_comm_exec(session); 1675 } 1676 return err; 1677 case PERF_RECORD_EVENT_UPDATE: 1678 return tool->event_update(tool, event, &session->evlist); 1679 case PERF_RECORD_HEADER_EVENT_TYPE: 1680 /* 1681 * Deprecated, but we need to handle it for sake 1682 * of old data files create in pipe mode. 1683 */ 1684 return 0; 1685 case PERF_RECORD_HEADER_TRACING_DATA: 1686 /* 1687 * Setup for reading amidst mmap, but only when we 1688 * are in 'file' mode. The 'pipe' fd is in proper 1689 * place already. 1690 */ 1691 if (!perf_data__is_pipe(session->data)) 1692 lseek(fd, file_offset, SEEK_SET); 1693 return tool->tracing_data(session, event); 1694 case PERF_RECORD_HEADER_BUILD_ID: 1695 return tool->build_id(session, event); 1696 case PERF_RECORD_FINISHED_ROUND: 1697 return tool->finished_round(tool, event, oe); 1698 case PERF_RECORD_ID_INDEX: 1699 return tool->id_index(session, event); 1700 case PERF_RECORD_AUXTRACE_INFO: 1701 return tool->auxtrace_info(session, event); 1702 case PERF_RECORD_AUXTRACE: 1703 /* 1704 * Setup for reading amidst mmap, but only when we 1705 * are in 'file' mode. The 'pipe' fd is in proper 1706 * place already. 1707 */ 1708 if (!perf_data__is_pipe(session->data)) 1709 lseek(fd, file_offset + event->header.size, SEEK_SET); 1710 return tool->auxtrace(session, event); 1711 case PERF_RECORD_AUXTRACE_ERROR: 1712 perf_session__auxtrace_error_inc(session, event); 1713 return tool->auxtrace_error(session, event); 1714 case PERF_RECORD_THREAD_MAP: 1715 return tool->thread_map(session, event); 1716 case PERF_RECORD_CPU_MAP: 1717 return tool->cpu_map(session, event); 1718 case PERF_RECORD_STAT_CONFIG: 1719 return tool->stat_config(session, event); 1720 case PERF_RECORD_STAT: 1721 return tool->stat(session, event); 1722 case PERF_RECORD_STAT_ROUND: 1723 return tool->stat_round(session, event); 1724 case PERF_RECORD_TIME_CONV: 1725 session->time_conv = event->time_conv; 1726 return tool->time_conv(session, event); 1727 case PERF_RECORD_HEADER_FEATURE: 1728 return tool->feature(session, event); 1729 case PERF_RECORD_COMPRESSED: 1730 err = tool->compressed(session, event, file_offset, file_path); 1731 if (err) 1732 dump_event(session->evlist, event, file_offset, &sample, file_path); 1733 return err; 1734 case PERF_RECORD_FINISHED_INIT: 1735 return tool->finished_init(session, event); 1736 default: 1737 return -EINVAL; 1738 } 1739 } 1740 1741 int perf_session__deliver_synth_event(struct perf_session *session, 1742 union perf_event *event, 1743 struct perf_sample *sample) 1744 { 1745 struct evlist *evlist = session->evlist; 1746 struct perf_tool *tool = session->tool; 1747 1748 events_stats__inc(&evlist->stats, event->header.type); 1749 1750 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1751 return perf_session__process_user_event(session, event, 0, NULL); 1752 1753 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0, NULL); 1754 } 1755 1756 static void event_swap(union perf_event *event, bool sample_id_all) 1757 { 1758 perf_event__swap_op swap; 1759 1760 swap = perf_event__swap_ops[event->header.type]; 1761 if (swap) 1762 swap(event, sample_id_all); 1763 } 1764 1765 int perf_session__peek_event(struct perf_session *session, off_t file_offset, 1766 void *buf, size_t buf_sz, 1767 union perf_event **event_ptr, 1768 struct perf_sample *sample) 1769 { 1770 union perf_event *event; 1771 size_t hdr_sz, rest; 1772 int fd; 1773 1774 if (session->one_mmap && !session->header.needs_swap) { 1775 event = file_offset - session->one_mmap_offset + 1776 session->one_mmap_addr; 1777 goto out_parse_sample; 1778 } 1779 1780 if (perf_data__is_pipe(session->data)) 1781 return -1; 1782 1783 fd = perf_data__fd(session->data); 1784 hdr_sz = sizeof(struct perf_event_header); 1785 1786 if (buf_sz < hdr_sz) 1787 return -1; 1788 1789 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 || 1790 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz) 1791 return -1; 1792 1793 event = (union perf_event *)buf; 1794 1795 if (session->header.needs_swap) 1796 perf_event_header__bswap(&event->header); 1797 1798 if (event->header.size < hdr_sz || event->header.size > buf_sz) 1799 return -1; 1800 1801 buf += hdr_sz; 1802 rest = event->header.size - hdr_sz; 1803 1804 if (readn(fd, buf, rest) != (ssize_t)rest) 1805 return -1; 1806 1807 if (session->header.needs_swap) 1808 event_swap(event, evlist__sample_id_all(session->evlist)); 1809 1810 out_parse_sample: 1811 1812 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START && 1813 evlist__parse_sample(session->evlist, event, sample)) 1814 return -1; 1815 1816 *event_ptr = event; 1817 1818 return 0; 1819 } 1820 1821 int perf_session__peek_events(struct perf_session *session, u64 offset, 1822 u64 size, peek_events_cb_t cb, void *data) 1823 { 1824 u64 max_offset = offset + size; 1825 char buf[PERF_SAMPLE_MAX_SIZE]; 1826 union perf_event *event; 1827 int err; 1828 1829 do { 1830 err = perf_session__peek_event(session, offset, buf, 1831 PERF_SAMPLE_MAX_SIZE, &event, 1832 NULL); 1833 if (err) 1834 return err; 1835 1836 err = cb(session, event, offset, data); 1837 if (err) 1838 return err; 1839 1840 offset += event->header.size; 1841 if (event->header.type == PERF_RECORD_AUXTRACE) 1842 offset += event->auxtrace.size; 1843 1844 } while (offset < max_offset); 1845 1846 return err; 1847 } 1848 1849 static s64 perf_session__process_event(struct perf_session *session, 1850 union perf_event *event, u64 file_offset, 1851 const char *file_path) 1852 { 1853 struct evlist *evlist = session->evlist; 1854 struct perf_tool *tool = session->tool; 1855 int ret; 1856 1857 if (session->header.needs_swap) 1858 event_swap(event, evlist__sample_id_all(evlist)); 1859 1860 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1861 return -EINVAL; 1862 1863 events_stats__inc(&evlist->stats, event->header.type); 1864 1865 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1866 return perf_session__process_user_event(session, event, file_offset, file_path); 1867 1868 if (tool->ordered_events) { 1869 u64 timestamp = -1ULL; 1870 1871 ret = evlist__parse_sample_timestamp(evlist, event, ×tamp); 1872 if (ret && ret != -1) 1873 return ret; 1874 1875 ret = perf_session__queue_event(session, event, timestamp, file_offset, file_path); 1876 if (ret != -ETIME) 1877 return ret; 1878 } 1879 1880 return perf_session__deliver_event(session, event, tool, file_offset, file_path); 1881 } 1882 1883 void perf_event_header__bswap(struct perf_event_header *hdr) 1884 { 1885 hdr->type = bswap_32(hdr->type); 1886 hdr->misc = bswap_16(hdr->misc); 1887 hdr->size = bswap_16(hdr->size); 1888 } 1889 1890 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1891 { 1892 return machine__findnew_thread(&session->machines.host, -1, pid); 1893 } 1894 1895 int perf_session__register_idle_thread(struct perf_session *session) 1896 { 1897 struct thread *thread = machine__idle_thread(&session->machines.host); 1898 1899 /* machine__idle_thread() got the thread, so put it */ 1900 thread__put(thread); 1901 return thread ? 0 : -1; 1902 } 1903 1904 static void 1905 perf_session__warn_order(const struct perf_session *session) 1906 { 1907 const struct ordered_events *oe = &session->ordered_events; 1908 struct evsel *evsel; 1909 bool should_warn = true; 1910 1911 evlist__for_each_entry(session->evlist, evsel) { 1912 if (evsel->core.attr.write_backward) 1913 should_warn = false; 1914 } 1915 1916 if (!should_warn) 1917 return; 1918 if (oe->nr_unordered_events != 0) 1919 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events); 1920 } 1921 1922 static void perf_session__warn_about_errors(const struct perf_session *session) 1923 { 1924 const struct events_stats *stats = &session->evlist->stats; 1925 1926 if (session->tool->lost == perf_event__process_lost && 1927 stats->nr_events[PERF_RECORD_LOST] != 0) { 1928 ui__warning("Processed %d events and lost %d chunks!\n\n" 1929 "Check IO/CPU overload!\n\n", 1930 stats->nr_events[0], 1931 stats->nr_events[PERF_RECORD_LOST]); 1932 } 1933 1934 if (session->tool->lost_samples == perf_event__process_lost_samples) { 1935 double drop_rate; 1936 1937 drop_rate = (double)stats->total_lost_samples / 1938 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples); 1939 if (drop_rate > 0.05) { 1940 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n", 1941 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples, 1942 drop_rate * 100.0); 1943 } 1944 } 1945 1946 if (session->tool->aux == perf_event__process_aux && 1947 stats->total_aux_lost != 0) { 1948 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n", 1949 stats->total_aux_lost, 1950 stats->nr_events[PERF_RECORD_AUX]); 1951 } 1952 1953 if (session->tool->aux == perf_event__process_aux && 1954 stats->total_aux_partial != 0) { 1955 bool vmm_exclusive = false; 1956 1957 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive", 1958 &vmm_exclusive); 1959 1960 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n" 1961 "Are you running a KVM guest in the background?%s\n\n", 1962 stats->total_aux_partial, 1963 stats->nr_events[PERF_RECORD_AUX], 1964 vmm_exclusive ? 1965 "\nReloading kvm_intel module with vmm_exclusive=0\n" 1966 "will reduce the gaps to only guest's timeslices." : 1967 ""); 1968 } 1969 1970 if (session->tool->aux == perf_event__process_aux && 1971 stats->total_aux_collision != 0) { 1972 ui__warning("AUX data detected collision %" PRIu64 " times out of %u!\n\n", 1973 stats->total_aux_collision, 1974 stats->nr_events[PERF_RECORD_AUX]); 1975 } 1976 1977 if (stats->nr_unknown_events != 0) { 1978 ui__warning("Found %u unknown events!\n\n" 1979 "Is this an older tool processing a perf.data " 1980 "file generated by a more recent tool?\n\n" 1981 "If that is not the case, consider " 1982 "reporting to linux-kernel@vger.kernel.org.\n\n", 1983 stats->nr_unknown_events); 1984 } 1985 1986 if (stats->nr_unknown_id != 0) { 1987 ui__warning("%u samples with id not present in the header\n", 1988 stats->nr_unknown_id); 1989 } 1990 1991 if (stats->nr_invalid_chains != 0) { 1992 ui__warning("Found invalid callchains!\n\n" 1993 "%u out of %u events were discarded for this reason.\n\n" 1994 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1995 stats->nr_invalid_chains, 1996 stats->nr_events[PERF_RECORD_SAMPLE]); 1997 } 1998 1999 if (stats->nr_unprocessable_samples != 0) { 2000 ui__warning("%u unprocessable samples recorded.\n" 2001 "Do you have a KVM guest running and not using 'perf kvm'?\n", 2002 stats->nr_unprocessable_samples); 2003 } 2004 2005 perf_session__warn_order(session); 2006 2007 events_stats__auxtrace_error_warn(stats); 2008 2009 if (stats->nr_proc_map_timeout != 0) { 2010 ui__warning("%d map information files for pre-existing threads were\n" 2011 "not processed, if there are samples for addresses they\n" 2012 "will not be resolved, you may find out which are these\n" 2013 "threads by running with -v and redirecting the output\n" 2014 "to a file.\n" 2015 "The time limit to process proc map is too short?\n" 2016 "Increase it by --proc-map-timeout\n", 2017 stats->nr_proc_map_timeout); 2018 } 2019 } 2020 2021 static int perf_session__flush_thread_stack(struct thread *thread, 2022 void *p __maybe_unused) 2023 { 2024 return thread_stack__flush(thread); 2025 } 2026 2027 static int perf_session__flush_thread_stacks(struct perf_session *session) 2028 { 2029 return machines__for_each_thread(&session->machines, 2030 perf_session__flush_thread_stack, 2031 NULL); 2032 } 2033 2034 volatile sig_atomic_t session_done; 2035 2036 static int __perf_session__process_decomp_events(struct perf_session *session); 2037 2038 static int __perf_session__process_pipe_events(struct perf_session *session) 2039 { 2040 struct ordered_events *oe = &session->ordered_events; 2041 struct perf_tool *tool = session->tool; 2042 union perf_event *event; 2043 uint32_t size, cur_size = 0; 2044 void *buf = NULL; 2045 s64 skip = 0; 2046 u64 head; 2047 ssize_t err; 2048 void *p; 2049 2050 perf_tool__fill_defaults(tool); 2051 2052 head = 0; 2053 cur_size = sizeof(union perf_event); 2054 2055 buf = malloc(cur_size); 2056 if (!buf) 2057 return -errno; 2058 ordered_events__set_copy_on_queue(oe, true); 2059 more: 2060 event = buf; 2061 err = perf_data__read(session->data, event, 2062 sizeof(struct perf_event_header)); 2063 if (err <= 0) { 2064 if (err == 0) 2065 goto done; 2066 2067 pr_err("failed to read event header\n"); 2068 goto out_err; 2069 } 2070 2071 if (session->header.needs_swap) 2072 perf_event_header__bswap(&event->header); 2073 2074 size = event->header.size; 2075 if (size < sizeof(struct perf_event_header)) { 2076 pr_err("bad event header size\n"); 2077 goto out_err; 2078 } 2079 2080 if (size > cur_size) { 2081 void *new = realloc(buf, size); 2082 if (!new) { 2083 pr_err("failed to allocate memory to read event\n"); 2084 goto out_err; 2085 } 2086 buf = new; 2087 cur_size = size; 2088 event = buf; 2089 } 2090 p = event; 2091 p += sizeof(struct perf_event_header); 2092 2093 if (size - sizeof(struct perf_event_header)) { 2094 err = perf_data__read(session->data, p, 2095 size - sizeof(struct perf_event_header)); 2096 if (err <= 0) { 2097 if (err == 0) { 2098 pr_err("unexpected end of event stream\n"); 2099 goto done; 2100 } 2101 2102 pr_err("failed to read event data\n"); 2103 goto out_err; 2104 } 2105 } 2106 2107 if ((skip = perf_session__process_event(session, event, head, "pipe")) < 0) { 2108 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 2109 head, event->header.size, event->header.type); 2110 err = -EINVAL; 2111 goto out_err; 2112 } 2113 2114 head += size; 2115 2116 if (skip > 0) 2117 head += skip; 2118 2119 err = __perf_session__process_decomp_events(session); 2120 if (err) 2121 goto out_err; 2122 2123 if (!session_done()) 2124 goto more; 2125 done: 2126 /* do the final flush for ordered samples */ 2127 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 2128 if (err) 2129 goto out_err; 2130 err = auxtrace__flush_events(session, tool); 2131 if (err) 2132 goto out_err; 2133 err = perf_session__flush_thread_stacks(session); 2134 out_err: 2135 free(buf); 2136 if (!tool->no_warn) 2137 perf_session__warn_about_errors(session); 2138 ordered_events__free(&session->ordered_events); 2139 auxtrace__free_events(session); 2140 return err; 2141 } 2142 2143 static union perf_event * 2144 prefetch_event(char *buf, u64 head, size_t mmap_size, 2145 bool needs_swap, union perf_event *error) 2146 { 2147 union perf_event *event; 2148 u16 event_size; 2149 2150 /* 2151 * Ensure we have enough space remaining to read 2152 * the size of the event in the headers. 2153 */ 2154 if (head + sizeof(event->header) > mmap_size) 2155 return NULL; 2156 2157 event = (union perf_event *)(buf + head); 2158 if (needs_swap) 2159 perf_event_header__bswap(&event->header); 2160 2161 event_size = event->header.size; 2162 if (head + event_size <= mmap_size) 2163 return event; 2164 2165 /* We're not fetching the event so swap back again */ 2166 if (needs_swap) 2167 perf_event_header__bswap(&event->header); 2168 2169 /* Check if the event fits into the next mmapped buf. */ 2170 if (event_size <= mmap_size - head % page_size) { 2171 /* Remap buf and fetch again. */ 2172 return NULL; 2173 } 2174 2175 /* Invalid input. Event size should never exceed mmap_size. */ 2176 pr_debug("%s: head=%#" PRIx64 " event->header.size=%#x, mmap_size=%#zx:" 2177 " fuzzed or compressed perf.data?\n", __func__, head, event_size, mmap_size); 2178 2179 return error; 2180 } 2181 2182 static union perf_event * 2183 fetch_mmaped_event(u64 head, size_t mmap_size, char *buf, bool needs_swap) 2184 { 2185 return prefetch_event(buf, head, mmap_size, needs_swap, ERR_PTR(-EINVAL)); 2186 } 2187 2188 static union perf_event * 2189 fetch_decomp_event(u64 head, size_t mmap_size, char *buf, bool needs_swap) 2190 { 2191 return prefetch_event(buf, head, mmap_size, needs_swap, NULL); 2192 } 2193 2194 static int __perf_session__process_decomp_events(struct perf_session *session) 2195 { 2196 s64 skip; 2197 u64 size; 2198 struct decomp *decomp = session->active_decomp->decomp_last; 2199 2200 if (!decomp) 2201 return 0; 2202 2203 while (decomp->head < decomp->size && !session_done()) { 2204 union perf_event *event = fetch_decomp_event(decomp->head, decomp->size, decomp->data, 2205 session->header.needs_swap); 2206 2207 if (!event) 2208 break; 2209 2210 size = event->header.size; 2211 2212 if (size < sizeof(struct perf_event_header) || 2213 (skip = perf_session__process_event(session, event, decomp->file_pos, 2214 decomp->file_path)) < 0) { 2215 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 2216 decomp->file_pos + decomp->head, event->header.size, event->header.type); 2217 return -EINVAL; 2218 } 2219 2220 if (skip) 2221 size += skip; 2222 2223 decomp->head += size; 2224 } 2225 2226 return 0; 2227 } 2228 2229 /* 2230 * On 64bit we can mmap the data file in one go. No need for tiny mmap 2231 * slices. On 32bit we use 32MB. 2232 */ 2233 #if BITS_PER_LONG == 64 2234 #define MMAP_SIZE ULLONG_MAX 2235 #define NUM_MMAPS 1 2236 #else 2237 #define MMAP_SIZE (32 * 1024 * 1024ULL) 2238 #define NUM_MMAPS 128 2239 #endif 2240 2241 struct reader; 2242 2243 typedef s64 (*reader_cb_t)(struct perf_session *session, 2244 union perf_event *event, 2245 u64 file_offset, 2246 const char *file_path); 2247 2248 struct reader { 2249 int fd; 2250 const char *path; 2251 u64 data_size; 2252 u64 data_offset; 2253 reader_cb_t process; 2254 bool in_place_update; 2255 char *mmaps[NUM_MMAPS]; 2256 size_t mmap_size; 2257 int mmap_idx; 2258 char *mmap_cur; 2259 u64 file_pos; 2260 u64 file_offset; 2261 u64 head; 2262 u64 size; 2263 bool done; 2264 struct zstd_data zstd_data; 2265 struct decomp_data decomp_data; 2266 }; 2267 2268 static int 2269 reader__init(struct reader *rd, bool *one_mmap) 2270 { 2271 u64 data_size = rd->data_size; 2272 char **mmaps = rd->mmaps; 2273 2274 rd->head = rd->data_offset; 2275 data_size += rd->data_offset; 2276 2277 rd->mmap_size = MMAP_SIZE; 2278 if (rd->mmap_size > data_size) { 2279 rd->mmap_size = data_size; 2280 if (one_mmap) 2281 *one_mmap = true; 2282 } 2283 2284 memset(mmaps, 0, sizeof(rd->mmaps)); 2285 2286 if (zstd_init(&rd->zstd_data, 0)) 2287 return -1; 2288 rd->decomp_data.zstd_decomp = &rd->zstd_data; 2289 2290 return 0; 2291 } 2292 2293 static void 2294 reader__release_decomp(struct reader *rd) 2295 { 2296 perf_decomp__release_events(rd->decomp_data.decomp); 2297 zstd_fini(&rd->zstd_data); 2298 } 2299 2300 static int 2301 reader__mmap(struct reader *rd, struct perf_session *session) 2302 { 2303 int mmap_prot, mmap_flags; 2304 char *buf, **mmaps = rd->mmaps; 2305 u64 page_offset; 2306 2307 mmap_prot = PROT_READ; 2308 mmap_flags = MAP_SHARED; 2309 2310 if (rd->in_place_update) { 2311 mmap_prot |= PROT_WRITE; 2312 } else if (session->header.needs_swap) { 2313 mmap_prot |= PROT_WRITE; 2314 mmap_flags = MAP_PRIVATE; 2315 } 2316 2317 if (mmaps[rd->mmap_idx]) { 2318 munmap(mmaps[rd->mmap_idx], rd->mmap_size); 2319 mmaps[rd->mmap_idx] = NULL; 2320 } 2321 2322 page_offset = page_size * (rd->head / page_size); 2323 rd->file_offset += page_offset; 2324 rd->head -= page_offset; 2325 2326 buf = mmap(NULL, rd->mmap_size, mmap_prot, mmap_flags, rd->fd, 2327 rd->file_offset); 2328 if (buf == MAP_FAILED) { 2329 pr_err("failed to mmap file\n"); 2330 return -errno; 2331 } 2332 mmaps[rd->mmap_idx] = rd->mmap_cur = buf; 2333 rd->mmap_idx = (rd->mmap_idx + 1) & (ARRAY_SIZE(rd->mmaps) - 1); 2334 rd->file_pos = rd->file_offset + rd->head; 2335 if (session->one_mmap) { 2336 session->one_mmap_addr = buf; 2337 session->one_mmap_offset = rd->file_offset; 2338 } 2339 2340 return 0; 2341 } 2342 2343 enum { 2344 READER_OK, 2345 READER_NODATA, 2346 }; 2347 2348 static int 2349 reader__read_event(struct reader *rd, struct perf_session *session, 2350 struct ui_progress *prog) 2351 { 2352 u64 size; 2353 int err = READER_OK; 2354 union perf_event *event; 2355 s64 skip; 2356 2357 event = fetch_mmaped_event(rd->head, rd->mmap_size, rd->mmap_cur, 2358 session->header.needs_swap); 2359 if (IS_ERR(event)) 2360 return PTR_ERR(event); 2361 2362 if (!event) 2363 return READER_NODATA; 2364 2365 size = event->header.size; 2366 2367 skip = -EINVAL; 2368 2369 if (size < sizeof(struct perf_event_header) || 2370 (skip = rd->process(session, event, rd->file_pos, rd->path)) < 0) { 2371 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n", 2372 rd->file_offset + rd->head, event->header.size, 2373 event->header.type, strerror(-skip)); 2374 err = skip; 2375 goto out; 2376 } 2377 2378 if (skip) 2379 size += skip; 2380 2381 rd->size += size; 2382 rd->head += size; 2383 rd->file_pos += size; 2384 2385 err = __perf_session__process_decomp_events(session); 2386 if (err) 2387 goto out; 2388 2389 ui_progress__update(prog, size); 2390 2391 out: 2392 return err; 2393 } 2394 2395 static inline bool 2396 reader__eof(struct reader *rd) 2397 { 2398 return (rd->file_pos >= rd->data_size + rd->data_offset); 2399 } 2400 2401 static int 2402 reader__process_events(struct reader *rd, struct perf_session *session, 2403 struct ui_progress *prog) 2404 { 2405 int err; 2406 2407 err = reader__init(rd, &session->one_mmap); 2408 if (err) 2409 goto out; 2410 2411 session->active_decomp = &rd->decomp_data; 2412 2413 remap: 2414 err = reader__mmap(rd, session); 2415 if (err) 2416 goto out; 2417 2418 more: 2419 err = reader__read_event(rd, session, prog); 2420 if (err < 0) 2421 goto out; 2422 else if (err == READER_NODATA) 2423 goto remap; 2424 2425 if (session_done()) 2426 goto out; 2427 2428 if (!reader__eof(rd)) 2429 goto more; 2430 2431 out: 2432 session->active_decomp = &session->decomp_data; 2433 return err; 2434 } 2435 2436 static s64 process_simple(struct perf_session *session, 2437 union perf_event *event, 2438 u64 file_offset, 2439 const char *file_path) 2440 { 2441 return perf_session__process_event(session, event, file_offset, file_path); 2442 } 2443 2444 static int __perf_session__process_events(struct perf_session *session) 2445 { 2446 struct reader rd = { 2447 .fd = perf_data__fd(session->data), 2448 .path = session->data->file.path, 2449 .data_size = session->header.data_size, 2450 .data_offset = session->header.data_offset, 2451 .process = process_simple, 2452 .in_place_update = session->data->in_place_update, 2453 }; 2454 struct ordered_events *oe = &session->ordered_events; 2455 struct perf_tool *tool = session->tool; 2456 struct ui_progress prog; 2457 int err; 2458 2459 perf_tool__fill_defaults(tool); 2460 2461 if (rd.data_size == 0) 2462 return -1; 2463 2464 ui_progress__init_size(&prog, rd.data_size, "Processing events..."); 2465 2466 err = reader__process_events(&rd, session, &prog); 2467 if (err) 2468 goto out_err; 2469 /* do the final flush for ordered samples */ 2470 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 2471 if (err) 2472 goto out_err; 2473 err = auxtrace__flush_events(session, tool); 2474 if (err) 2475 goto out_err; 2476 err = perf_session__flush_thread_stacks(session); 2477 out_err: 2478 ui_progress__finish(); 2479 if (!tool->no_warn) 2480 perf_session__warn_about_errors(session); 2481 /* 2482 * We may switching perf.data output, make ordered_events 2483 * reusable. 2484 */ 2485 ordered_events__reinit(&session->ordered_events); 2486 auxtrace__free_events(session); 2487 reader__release_decomp(&rd); 2488 session->one_mmap = false; 2489 return err; 2490 } 2491 2492 /* 2493 * Processing 2 MB of data from each reader in sequence, 2494 * because that's the way the ordered events sorting works 2495 * most efficiently. 2496 */ 2497 #define READER_MAX_SIZE (2 * 1024 * 1024) 2498 2499 /* 2500 * This function reads, merge and process directory data. 2501 * It assumens the version 1 of directory data, where each 2502 * data file holds per-cpu data, already sorted by kernel. 2503 */ 2504 static int __perf_session__process_dir_events(struct perf_session *session) 2505 { 2506 struct perf_data *data = session->data; 2507 struct perf_tool *tool = session->tool; 2508 int i, ret, readers, nr_readers; 2509 struct ui_progress prog; 2510 u64 total_size = perf_data__size(session->data); 2511 struct reader *rd; 2512 2513 perf_tool__fill_defaults(tool); 2514 2515 ui_progress__init_size(&prog, total_size, "Sorting events..."); 2516 2517 nr_readers = 1; 2518 for (i = 0; i < data->dir.nr; i++) { 2519 if (data->dir.files[i].size) 2520 nr_readers++; 2521 } 2522 2523 rd = zalloc(nr_readers * sizeof(struct reader)); 2524 if (!rd) 2525 return -ENOMEM; 2526 2527 rd[0] = (struct reader) { 2528 .fd = perf_data__fd(session->data), 2529 .path = session->data->file.path, 2530 .data_size = session->header.data_size, 2531 .data_offset = session->header.data_offset, 2532 .process = process_simple, 2533 .in_place_update = session->data->in_place_update, 2534 }; 2535 ret = reader__init(&rd[0], NULL); 2536 if (ret) 2537 goto out_err; 2538 ret = reader__mmap(&rd[0], session); 2539 if (ret) 2540 goto out_err; 2541 readers = 1; 2542 2543 for (i = 0; i < data->dir.nr; i++) { 2544 if (!data->dir.files[i].size) 2545 continue; 2546 rd[readers] = (struct reader) { 2547 .fd = data->dir.files[i].fd, 2548 .path = data->dir.files[i].path, 2549 .data_size = data->dir.files[i].size, 2550 .data_offset = 0, 2551 .process = process_simple, 2552 .in_place_update = session->data->in_place_update, 2553 }; 2554 ret = reader__init(&rd[readers], NULL); 2555 if (ret) 2556 goto out_err; 2557 ret = reader__mmap(&rd[readers], session); 2558 if (ret) 2559 goto out_err; 2560 readers++; 2561 } 2562 2563 i = 0; 2564 while (readers) { 2565 if (session_done()) 2566 break; 2567 2568 if (rd[i].done) { 2569 i = (i + 1) % nr_readers; 2570 continue; 2571 } 2572 if (reader__eof(&rd[i])) { 2573 rd[i].done = true; 2574 readers--; 2575 continue; 2576 } 2577 2578 session->active_decomp = &rd[i].decomp_data; 2579 ret = reader__read_event(&rd[i], session, &prog); 2580 if (ret < 0) { 2581 goto out_err; 2582 } else if (ret == READER_NODATA) { 2583 ret = reader__mmap(&rd[i], session); 2584 if (ret) 2585 goto out_err; 2586 } 2587 2588 if (rd[i].size >= READER_MAX_SIZE) { 2589 rd[i].size = 0; 2590 i = (i + 1) % nr_readers; 2591 } 2592 } 2593 2594 ret = ordered_events__flush(&session->ordered_events, OE_FLUSH__FINAL); 2595 if (ret) 2596 goto out_err; 2597 2598 ret = perf_session__flush_thread_stacks(session); 2599 out_err: 2600 ui_progress__finish(); 2601 2602 if (!tool->no_warn) 2603 perf_session__warn_about_errors(session); 2604 2605 /* 2606 * We may switching perf.data output, make ordered_events 2607 * reusable. 2608 */ 2609 ordered_events__reinit(&session->ordered_events); 2610 2611 session->one_mmap = false; 2612 2613 session->active_decomp = &session->decomp_data; 2614 for (i = 0; i < nr_readers; i++) 2615 reader__release_decomp(&rd[i]); 2616 zfree(&rd); 2617 2618 return ret; 2619 } 2620 2621 int perf_session__process_events(struct perf_session *session) 2622 { 2623 if (perf_session__register_idle_thread(session) < 0) 2624 return -ENOMEM; 2625 2626 if (perf_data__is_pipe(session->data)) 2627 return __perf_session__process_pipe_events(session); 2628 2629 if (perf_data__is_dir(session->data) && session->data->dir.nr) 2630 return __perf_session__process_dir_events(session); 2631 2632 return __perf_session__process_events(session); 2633 } 2634 2635 bool perf_session__has_traces(struct perf_session *session, const char *msg) 2636 { 2637 struct evsel *evsel; 2638 2639 evlist__for_each_entry(session->evlist, evsel) { 2640 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) 2641 return true; 2642 } 2643 2644 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 2645 return false; 2646 } 2647 2648 int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr) 2649 { 2650 char *bracket; 2651 struct ref_reloc_sym *ref; 2652 struct kmap *kmap; 2653 2654 ref = zalloc(sizeof(struct ref_reloc_sym)); 2655 if (ref == NULL) 2656 return -ENOMEM; 2657 2658 ref->name = strdup(symbol_name); 2659 if (ref->name == NULL) { 2660 free(ref); 2661 return -ENOMEM; 2662 } 2663 2664 bracket = strchr(ref->name, ']'); 2665 if (bracket) 2666 *bracket = '\0'; 2667 2668 ref->addr = addr; 2669 2670 kmap = map__kmap(map); 2671 if (kmap) 2672 kmap->ref_reloc_sym = ref; 2673 2674 return 0; 2675 } 2676 2677 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp) 2678 { 2679 return machines__fprintf_dsos(&session->machines, fp); 2680 } 2681 2682 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp, 2683 bool (skip)(struct dso *dso, int parm), int parm) 2684 { 2685 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm); 2686 } 2687 2688 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp, 2689 bool skip_empty) 2690 { 2691 size_t ret; 2692 const char *msg = ""; 2693 2694 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE)) 2695 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)"; 2696 2697 ret = fprintf(fp, "\nAggregated stats:%s\n", msg); 2698 2699 ret += events_stats__fprintf(&session->evlist->stats, fp, skip_empty); 2700 return ret; 2701 } 2702 2703 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 2704 { 2705 /* 2706 * FIXME: Here we have to actually print all the machines in this 2707 * session, not just the host... 2708 */ 2709 return machine__fprintf(&session->machines.host, fp); 2710 } 2711 2712 struct evsel *perf_session__find_first_evtype(struct perf_session *session, 2713 unsigned int type) 2714 { 2715 struct evsel *pos; 2716 2717 evlist__for_each_entry(session->evlist, pos) { 2718 if (pos->core.attr.type == type) 2719 return pos; 2720 } 2721 return NULL; 2722 } 2723 2724 int perf_session__cpu_bitmap(struct perf_session *session, 2725 const char *cpu_list, unsigned long *cpu_bitmap) 2726 { 2727 int i, err = -1; 2728 struct perf_cpu_map *map; 2729 int nr_cpus = min(session->header.env.nr_cpus_avail, MAX_NR_CPUS); 2730 2731 for (i = 0; i < PERF_TYPE_MAX; ++i) { 2732 struct evsel *evsel; 2733 2734 evsel = perf_session__find_first_evtype(session, i); 2735 if (!evsel) 2736 continue; 2737 2738 if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CPU)) { 2739 pr_err("File does not contain CPU events. " 2740 "Remove -C option to proceed.\n"); 2741 return -1; 2742 } 2743 } 2744 2745 map = perf_cpu_map__new(cpu_list); 2746 if (map == NULL) { 2747 pr_err("Invalid cpu_list\n"); 2748 return -1; 2749 } 2750 2751 for (i = 0; i < perf_cpu_map__nr(map); i++) { 2752 struct perf_cpu cpu = perf_cpu_map__cpu(map, i); 2753 2754 if (cpu.cpu >= nr_cpus) { 2755 pr_err("Requested CPU %d too large. " 2756 "Consider raising MAX_NR_CPUS\n", cpu.cpu); 2757 goto out_delete_map; 2758 } 2759 2760 __set_bit(cpu.cpu, cpu_bitmap); 2761 } 2762 2763 err = 0; 2764 2765 out_delete_map: 2766 perf_cpu_map__put(map); 2767 return err; 2768 } 2769 2770 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 2771 bool full) 2772 { 2773 if (session == NULL || fp == NULL) 2774 return; 2775 2776 fprintf(fp, "# ========\n"); 2777 perf_header__fprintf_info(session, fp, full); 2778 fprintf(fp, "# ========\n#\n"); 2779 } 2780 2781 static int perf_session__register_guest(struct perf_session *session, pid_t machine_pid) 2782 { 2783 struct machine *machine = machines__findnew(&session->machines, machine_pid); 2784 struct thread *thread; 2785 2786 if (!machine) 2787 return -ENOMEM; 2788 2789 machine->single_address_space = session->machines.host.single_address_space; 2790 2791 thread = machine__idle_thread(machine); 2792 if (!thread) 2793 return -ENOMEM; 2794 thread__put(thread); 2795 2796 machine->kallsyms_filename = perf_data__guest_kallsyms_name(session->data, machine_pid); 2797 2798 return 0; 2799 } 2800 2801 static int perf_session__set_guest_cpu(struct perf_session *session, pid_t pid, 2802 pid_t tid, int guest_cpu) 2803 { 2804 struct machine *machine = &session->machines.host; 2805 struct thread *thread = machine__findnew_thread(machine, pid, tid); 2806 2807 if (!thread) 2808 return -ENOMEM; 2809 thread->guest_cpu = guest_cpu; 2810 thread__put(thread); 2811 2812 return 0; 2813 } 2814 2815 int perf_event__process_id_index(struct perf_session *session, 2816 union perf_event *event) 2817 { 2818 struct evlist *evlist = session->evlist; 2819 struct perf_record_id_index *ie = &event->id_index; 2820 size_t sz = ie->header.size - sizeof(*ie); 2821 size_t i, nr, max_nr; 2822 size_t e1_sz = sizeof(struct id_index_entry); 2823 size_t e2_sz = sizeof(struct id_index_entry_2); 2824 size_t etot_sz = e1_sz + e2_sz; 2825 struct id_index_entry_2 *e2; 2826 pid_t last_pid = 0; 2827 2828 max_nr = sz / e1_sz; 2829 nr = ie->nr; 2830 if (nr > max_nr) { 2831 printf("Too big: nr %zu max_nr %zu\n", nr, max_nr); 2832 return -EINVAL; 2833 } 2834 2835 if (sz >= nr * etot_sz) { 2836 max_nr = sz / etot_sz; 2837 if (nr > max_nr) { 2838 printf("Too big2: nr %zu max_nr %zu\n", nr, max_nr); 2839 return -EINVAL; 2840 } 2841 e2 = (void *)ie + sizeof(*ie) + nr * e1_sz; 2842 } else { 2843 e2 = NULL; 2844 } 2845 2846 if (dump_trace) 2847 fprintf(stdout, " nr: %zu\n", nr); 2848 2849 for (i = 0; i < nr; i++, (e2 ? e2++ : 0)) { 2850 struct id_index_entry *e = &ie->entries[i]; 2851 struct perf_sample_id *sid; 2852 int ret; 2853 2854 if (dump_trace) { 2855 fprintf(stdout, " ... id: %"PRI_lu64, e->id); 2856 fprintf(stdout, " idx: %"PRI_lu64, e->idx); 2857 fprintf(stdout, " cpu: %"PRI_ld64, e->cpu); 2858 fprintf(stdout, " tid: %"PRI_ld64, e->tid); 2859 if (e2) { 2860 fprintf(stdout, " machine_pid: %"PRI_ld64, e2->machine_pid); 2861 fprintf(stdout, " vcpu: %"PRI_lu64"\n", e2->vcpu); 2862 } else { 2863 fprintf(stdout, "\n"); 2864 } 2865 } 2866 2867 sid = evlist__id2sid(evlist, e->id); 2868 if (!sid) 2869 return -ENOENT; 2870 2871 sid->idx = e->idx; 2872 sid->cpu.cpu = e->cpu; 2873 sid->tid = e->tid; 2874 2875 if (!e2) 2876 continue; 2877 2878 sid->machine_pid = e2->machine_pid; 2879 sid->vcpu.cpu = e2->vcpu; 2880 2881 if (!sid->machine_pid) 2882 continue; 2883 2884 if (sid->machine_pid != last_pid) { 2885 ret = perf_session__register_guest(session, sid->machine_pid); 2886 if (ret) 2887 return ret; 2888 last_pid = sid->machine_pid; 2889 perf_guest = true; 2890 } 2891 2892 ret = perf_session__set_guest_cpu(session, sid->machine_pid, e->tid, e2->vcpu); 2893 if (ret) 2894 return ret; 2895 } 2896 return 0; 2897 } 2898