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 process_finished_round(struct perf_tool *tool, 378 union perf_event *event, 379 struct ordered_events *oe); 380 381 static int skipn(int fd, off_t n) 382 { 383 char buf[4096]; 384 ssize_t ret; 385 386 while (n > 0) { 387 ret = read(fd, buf, min(n, (off_t)sizeof(buf))); 388 if (ret <= 0) 389 return ret; 390 n -= ret; 391 } 392 393 return 0; 394 } 395 396 static s64 process_event_auxtrace_stub(struct perf_session *session __maybe_unused, 397 union perf_event *event) 398 { 399 dump_printf(": unhandled!\n"); 400 if (perf_data__is_pipe(session->data)) 401 skipn(perf_data__fd(session->data), event->auxtrace.size); 402 return event->auxtrace.size; 403 } 404 405 static int process_event_op2_stub(struct perf_session *session __maybe_unused, 406 union perf_event *event __maybe_unused) 407 { 408 dump_printf(": unhandled!\n"); 409 return 0; 410 } 411 412 413 static 414 int process_event_thread_map_stub(struct perf_session *session __maybe_unused, 415 union perf_event *event __maybe_unused) 416 { 417 if (dump_trace) 418 perf_event__fprintf_thread_map(event, stdout); 419 420 dump_printf(": unhandled!\n"); 421 return 0; 422 } 423 424 static 425 int process_event_cpu_map_stub(struct perf_session *session __maybe_unused, 426 union perf_event *event __maybe_unused) 427 { 428 if (dump_trace) 429 perf_event__fprintf_cpu_map(event, stdout); 430 431 dump_printf(": unhandled!\n"); 432 return 0; 433 } 434 435 static 436 int process_event_stat_config_stub(struct perf_session *session __maybe_unused, 437 union perf_event *event __maybe_unused) 438 { 439 if (dump_trace) 440 perf_event__fprintf_stat_config(event, stdout); 441 442 dump_printf(": unhandled!\n"); 443 return 0; 444 } 445 446 static int process_stat_stub(struct perf_session *perf_session __maybe_unused, 447 union perf_event *event) 448 { 449 if (dump_trace) 450 perf_event__fprintf_stat(event, stdout); 451 452 dump_printf(": unhandled!\n"); 453 return 0; 454 } 455 456 static int process_stat_round_stub(struct perf_session *perf_session __maybe_unused, 457 union perf_event *event) 458 { 459 if (dump_trace) 460 perf_event__fprintf_stat_round(event, stdout); 461 462 dump_printf(": unhandled!\n"); 463 return 0; 464 } 465 466 static int process_event_time_conv_stub(struct perf_session *perf_session __maybe_unused, 467 union perf_event *event) 468 { 469 if (dump_trace) 470 perf_event__fprintf_time_conv(event, stdout); 471 472 dump_printf(": unhandled!\n"); 473 return 0; 474 } 475 476 static int perf_session__process_compressed_event_stub(struct perf_session *session __maybe_unused, 477 union perf_event *event __maybe_unused, 478 u64 file_offset __maybe_unused, 479 const char *file_path __maybe_unused) 480 { 481 dump_printf(": unhandled!\n"); 482 return 0; 483 } 484 485 void perf_tool__fill_defaults(struct perf_tool *tool) 486 { 487 if (tool->sample == NULL) 488 tool->sample = process_event_sample_stub; 489 if (tool->mmap == NULL) 490 tool->mmap = process_event_stub; 491 if (tool->mmap2 == NULL) 492 tool->mmap2 = process_event_stub; 493 if (tool->comm == NULL) 494 tool->comm = process_event_stub; 495 if (tool->namespaces == NULL) 496 tool->namespaces = process_event_stub; 497 if (tool->cgroup == NULL) 498 tool->cgroup = process_event_stub; 499 if (tool->fork == NULL) 500 tool->fork = process_event_stub; 501 if (tool->exit == NULL) 502 tool->exit = process_event_stub; 503 if (tool->lost == NULL) 504 tool->lost = perf_event__process_lost; 505 if (tool->lost_samples == NULL) 506 tool->lost_samples = perf_event__process_lost_samples; 507 if (tool->aux == NULL) 508 tool->aux = perf_event__process_aux; 509 if (tool->itrace_start == NULL) 510 tool->itrace_start = perf_event__process_itrace_start; 511 if (tool->context_switch == NULL) 512 tool->context_switch = perf_event__process_switch; 513 if (tool->ksymbol == NULL) 514 tool->ksymbol = perf_event__process_ksymbol; 515 if (tool->bpf == NULL) 516 tool->bpf = perf_event__process_bpf; 517 if (tool->text_poke == NULL) 518 tool->text_poke = perf_event__process_text_poke; 519 if (tool->aux_output_hw_id == NULL) 520 tool->aux_output_hw_id = perf_event__process_aux_output_hw_id; 521 if (tool->read == NULL) 522 tool->read = process_event_sample_stub; 523 if (tool->throttle == NULL) 524 tool->throttle = process_event_stub; 525 if (tool->unthrottle == NULL) 526 tool->unthrottle = process_event_stub; 527 if (tool->attr == NULL) 528 tool->attr = process_event_synth_attr_stub; 529 if (tool->event_update == NULL) 530 tool->event_update = process_event_synth_event_update_stub; 531 if (tool->tracing_data == NULL) 532 tool->tracing_data = process_event_synth_tracing_data_stub; 533 if (tool->build_id == NULL) 534 tool->build_id = process_event_op2_stub; 535 if (tool->finished_round == NULL) { 536 if (tool->ordered_events) 537 tool->finished_round = process_finished_round; 538 else 539 tool->finished_round = process_finished_round_stub; 540 } 541 if (tool->id_index == NULL) 542 tool->id_index = process_event_op2_stub; 543 if (tool->auxtrace_info == NULL) 544 tool->auxtrace_info = process_event_op2_stub; 545 if (tool->auxtrace == NULL) 546 tool->auxtrace = process_event_auxtrace_stub; 547 if (tool->auxtrace_error == NULL) 548 tool->auxtrace_error = process_event_op2_stub; 549 if (tool->thread_map == NULL) 550 tool->thread_map = process_event_thread_map_stub; 551 if (tool->cpu_map == NULL) 552 tool->cpu_map = process_event_cpu_map_stub; 553 if (tool->stat_config == NULL) 554 tool->stat_config = process_event_stat_config_stub; 555 if (tool->stat == NULL) 556 tool->stat = process_stat_stub; 557 if (tool->stat_round == NULL) 558 tool->stat_round = process_stat_round_stub; 559 if (tool->time_conv == NULL) 560 tool->time_conv = process_event_time_conv_stub; 561 if (tool->feature == NULL) 562 tool->feature = process_event_op2_stub; 563 if (tool->compressed == NULL) 564 tool->compressed = perf_session__process_compressed_event; 565 if (tool->finished_init == NULL) 566 tool->finished_init = process_event_op2_stub; 567 } 568 569 static void swap_sample_id_all(union perf_event *event, void *data) 570 { 571 void *end = (void *) event + event->header.size; 572 int size = end - data; 573 574 BUG_ON(size % sizeof(u64)); 575 mem_bswap_64(data, size); 576 } 577 578 static void perf_event__all64_swap(union perf_event *event, 579 bool sample_id_all __maybe_unused) 580 { 581 struct perf_event_header *hdr = &event->header; 582 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 583 } 584 585 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 586 { 587 event->comm.pid = bswap_32(event->comm.pid); 588 event->comm.tid = bswap_32(event->comm.tid); 589 590 if (sample_id_all) { 591 void *data = &event->comm.comm; 592 593 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 594 swap_sample_id_all(event, data); 595 } 596 } 597 598 static void perf_event__mmap_swap(union perf_event *event, 599 bool sample_id_all) 600 { 601 event->mmap.pid = bswap_32(event->mmap.pid); 602 event->mmap.tid = bswap_32(event->mmap.tid); 603 event->mmap.start = bswap_64(event->mmap.start); 604 event->mmap.len = bswap_64(event->mmap.len); 605 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 606 607 if (sample_id_all) { 608 void *data = &event->mmap.filename; 609 610 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 611 swap_sample_id_all(event, data); 612 } 613 } 614 615 static void perf_event__mmap2_swap(union perf_event *event, 616 bool sample_id_all) 617 { 618 event->mmap2.pid = bswap_32(event->mmap2.pid); 619 event->mmap2.tid = bswap_32(event->mmap2.tid); 620 event->mmap2.start = bswap_64(event->mmap2.start); 621 event->mmap2.len = bswap_64(event->mmap2.len); 622 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); 623 624 if (!(event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID)) { 625 event->mmap2.maj = bswap_32(event->mmap2.maj); 626 event->mmap2.min = bswap_32(event->mmap2.min); 627 event->mmap2.ino = bswap_64(event->mmap2.ino); 628 event->mmap2.ino_generation = bswap_64(event->mmap2.ino_generation); 629 } 630 631 if (sample_id_all) { 632 void *data = &event->mmap2.filename; 633 634 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 635 swap_sample_id_all(event, data); 636 } 637 } 638 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 639 { 640 event->fork.pid = bswap_32(event->fork.pid); 641 event->fork.tid = bswap_32(event->fork.tid); 642 event->fork.ppid = bswap_32(event->fork.ppid); 643 event->fork.ptid = bswap_32(event->fork.ptid); 644 event->fork.time = bswap_64(event->fork.time); 645 646 if (sample_id_all) 647 swap_sample_id_all(event, &event->fork + 1); 648 } 649 650 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 651 { 652 event->read.pid = bswap_32(event->read.pid); 653 event->read.tid = bswap_32(event->read.tid); 654 event->read.value = bswap_64(event->read.value); 655 event->read.time_enabled = bswap_64(event->read.time_enabled); 656 event->read.time_running = bswap_64(event->read.time_running); 657 event->read.id = bswap_64(event->read.id); 658 659 if (sample_id_all) 660 swap_sample_id_all(event, &event->read + 1); 661 } 662 663 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all) 664 { 665 event->aux.aux_offset = bswap_64(event->aux.aux_offset); 666 event->aux.aux_size = bswap_64(event->aux.aux_size); 667 event->aux.flags = bswap_64(event->aux.flags); 668 669 if (sample_id_all) 670 swap_sample_id_all(event, &event->aux + 1); 671 } 672 673 static void perf_event__itrace_start_swap(union perf_event *event, 674 bool sample_id_all) 675 { 676 event->itrace_start.pid = bswap_32(event->itrace_start.pid); 677 event->itrace_start.tid = bswap_32(event->itrace_start.tid); 678 679 if (sample_id_all) 680 swap_sample_id_all(event, &event->itrace_start + 1); 681 } 682 683 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all) 684 { 685 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) { 686 event->context_switch.next_prev_pid = 687 bswap_32(event->context_switch.next_prev_pid); 688 event->context_switch.next_prev_tid = 689 bswap_32(event->context_switch.next_prev_tid); 690 } 691 692 if (sample_id_all) 693 swap_sample_id_all(event, &event->context_switch + 1); 694 } 695 696 static void perf_event__text_poke_swap(union perf_event *event, bool sample_id_all) 697 { 698 event->text_poke.addr = bswap_64(event->text_poke.addr); 699 event->text_poke.old_len = bswap_16(event->text_poke.old_len); 700 event->text_poke.new_len = bswap_16(event->text_poke.new_len); 701 702 if (sample_id_all) { 703 size_t len = sizeof(event->text_poke.old_len) + 704 sizeof(event->text_poke.new_len) + 705 event->text_poke.old_len + 706 event->text_poke.new_len; 707 void *data = &event->text_poke.old_len; 708 709 data += PERF_ALIGN(len, sizeof(u64)); 710 swap_sample_id_all(event, data); 711 } 712 } 713 714 static void perf_event__throttle_swap(union perf_event *event, 715 bool sample_id_all) 716 { 717 event->throttle.time = bswap_64(event->throttle.time); 718 event->throttle.id = bswap_64(event->throttle.id); 719 event->throttle.stream_id = bswap_64(event->throttle.stream_id); 720 721 if (sample_id_all) 722 swap_sample_id_all(event, &event->throttle + 1); 723 } 724 725 static void perf_event__namespaces_swap(union perf_event *event, 726 bool sample_id_all) 727 { 728 u64 i; 729 730 event->namespaces.pid = bswap_32(event->namespaces.pid); 731 event->namespaces.tid = bswap_32(event->namespaces.tid); 732 event->namespaces.nr_namespaces = bswap_64(event->namespaces.nr_namespaces); 733 734 for (i = 0; i < event->namespaces.nr_namespaces; i++) { 735 struct perf_ns_link_info *ns = &event->namespaces.link_info[i]; 736 737 ns->dev = bswap_64(ns->dev); 738 ns->ino = bswap_64(ns->ino); 739 } 740 741 if (sample_id_all) 742 swap_sample_id_all(event, &event->namespaces.link_info[i]); 743 } 744 745 static void perf_event__cgroup_swap(union perf_event *event, bool sample_id_all) 746 { 747 event->cgroup.id = bswap_64(event->cgroup.id); 748 749 if (sample_id_all) { 750 void *data = &event->cgroup.path; 751 752 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 753 swap_sample_id_all(event, data); 754 } 755 } 756 757 static u8 revbyte(u8 b) 758 { 759 int rev = (b >> 4) | ((b & 0xf) << 4); 760 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 761 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 762 return (u8) rev; 763 } 764 765 /* 766 * XXX this is hack in attempt to carry flags bitfield 767 * through endian village. ABI says: 768 * 769 * Bit-fields are allocated from right to left (least to most significant) 770 * on little-endian implementations and from left to right (most to least 771 * significant) on big-endian implementations. 772 * 773 * The above seems to be byte specific, so we need to reverse each 774 * byte of the bitfield. 'Internet' also says this might be implementation 775 * specific and we probably need proper fix and carry perf_event_attr 776 * bitfield flags in separate data file FEAT_ section. Thought this seems 777 * to work for now. 778 */ 779 static void swap_bitfield(u8 *p, unsigned len) 780 { 781 unsigned i; 782 783 for (i = 0; i < len; i++) { 784 *p = revbyte(*p); 785 p++; 786 } 787 } 788 789 /* exported for swapping attributes in file header */ 790 void perf_event__attr_swap(struct perf_event_attr *attr) 791 { 792 attr->type = bswap_32(attr->type); 793 attr->size = bswap_32(attr->size); 794 795 #define bswap_safe(f, n) \ 796 (attr->size > (offsetof(struct perf_event_attr, f) + \ 797 sizeof(attr->f) * (n))) 798 #define bswap_field(f, sz) \ 799 do { \ 800 if (bswap_safe(f, 0)) \ 801 attr->f = bswap_##sz(attr->f); \ 802 } while(0) 803 #define bswap_field_16(f) bswap_field(f, 16) 804 #define bswap_field_32(f) bswap_field(f, 32) 805 #define bswap_field_64(f) bswap_field(f, 64) 806 807 bswap_field_64(config); 808 bswap_field_64(sample_period); 809 bswap_field_64(sample_type); 810 bswap_field_64(read_format); 811 bswap_field_32(wakeup_events); 812 bswap_field_32(bp_type); 813 bswap_field_64(bp_addr); 814 bswap_field_64(bp_len); 815 bswap_field_64(branch_sample_type); 816 bswap_field_64(sample_regs_user); 817 bswap_field_32(sample_stack_user); 818 bswap_field_32(aux_watermark); 819 bswap_field_16(sample_max_stack); 820 bswap_field_32(aux_sample_size); 821 822 /* 823 * After read_format are bitfields. Check read_format because 824 * we are unable to use offsetof on bitfield. 825 */ 826 if (bswap_safe(read_format, 1)) 827 swap_bitfield((u8 *) (&attr->read_format + 1), 828 sizeof(u64)); 829 #undef bswap_field_64 830 #undef bswap_field_32 831 #undef bswap_field 832 #undef bswap_safe 833 } 834 835 static void perf_event__hdr_attr_swap(union perf_event *event, 836 bool sample_id_all __maybe_unused) 837 { 838 size_t size; 839 840 perf_event__attr_swap(&event->attr.attr); 841 842 size = event->header.size; 843 size -= (void *)&event->attr.id - (void *)event; 844 mem_bswap_64(event->attr.id, size); 845 } 846 847 static void perf_event__event_update_swap(union perf_event *event, 848 bool sample_id_all __maybe_unused) 849 { 850 event->event_update.type = bswap_64(event->event_update.type); 851 event->event_update.id = bswap_64(event->event_update.id); 852 } 853 854 static void perf_event__event_type_swap(union perf_event *event, 855 bool sample_id_all __maybe_unused) 856 { 857 event->event_type.event_type.event_id = 858 bswap_64(event->event_type.event_type.event_id); 859 } 860 861 static void perf_event__tracing_data_swap(union perf_event *event, 862 bool sample_id_all __maybe_unused) 863 { 864 event->tracing_data.size = bswap_32(event->tracing_data.size); 865 } 866 867 static void perf_event__auxtrace_info_swap(union perf_event *event, 868 bool sample_id_all __maybe_unused) 869 { 870 size_t size; 871 872 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type); 873 874 size = event->header.size; 875 size -= (void *)&event->auxtrace_info.priv - (void *)event; 876 mem_bswap_64(event->auxtrace_info.priv, size); 877 } 878 879 static void perf_event__auxtrace_swap(union perf_event *event, 880 bool sample_id_all __maybe_unused) 881 { 882 event->auxtrace.size = bswap_64(event->auxtrace.size); 883 event->auxtrace.offset = bswap_64(event->auxtrace.offset); 884 event->auxtrace.reference = bswap_64(event->auxtrace.reference); 885 event->auxtrace.idx = bswap_32(event->auxtrace.idx); 886 event->auxtrace.tid = bswap_32(event->auxtrace.tid); 887 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu); 888 } 889 890 static void perf_event__auxtrace_error_swap(union perf_event *event, 891 bool sample_id_all __maybe_unused) 892 { 893 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type); 894 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code); 895 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu); 896 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid); 897 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid); 898 event->auxtrace_error.fmt = bswap_32(event->auxtrace_error.fmt); 899 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip); 900 if (event->auxtrace_error.fmt) 901 event->auxtrace_error.time = bswap_64(event->auxtrace_error.time); 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 struct cpu_map_entries *cpus; 920 struct perf_record_record_cpu_map *mask; 921 unsigned i; 922 923 data->type = bswap_16(data->type); 924 925 switch (data->type) { 926 case PERF_CPU_MAP__CPUS: 927 cpus = (struct cpu_map_entries *)data->data; 928 929 cpus->nr = bswap_16(cpus->nr); 930 931 for (i = 0; i < cpus->nr; i++) 932 cpus->cpu[i] = bswap_16(cpus->cpu[i]); 933 break; 934 case PERF_CPU_MAP__MASK: 935 mask = (struct perf_record_record_cpu_map *)data->data; 936 937 mask->nr = bswap_16(mask->nr); 938 mask->long_size = bswap_16(mask->long_size); 939 940 switch (mask->long_size) { 941 case 4: mem_bswap_32(&mask->mask, mask->nr); break; 942 case 8: mem_bswap_64(&mask->mask, mask->nr); break; 943 default: 944 pr_err("cpu_map swap: unsupported long size\n"); 945 } 946 default: 947 break; 948 } 949 } 950 951 static void perf_event__stat_config_swap(union perf_event *event, 952 bool sample_id_all __maybe_unused) 953 { 954 u64 size; 955 956 size = bswap_64(event->stat_config.nr) * sizeof(event->stat_config.data[0]); 957 size += 1; /* nr item itself */ 958 mem_bswap_64(&event->stat_config.nr, size); 959 } 960 961 static void perf_event__stat_swap(union perf_event *event, 962 bool sample_id_all __maybe_unused) 963 { 964 event->stat.id = bswap_64(event->stat.id); 965 event->stat.thread = bswap_32(event->stat.thread); 966 event->stat.cpu = bswap_32(event->stat.cpu); 967 event->stat.val = bswap_64(event->stat.val); 968 event->stat.ena = bswap_64(event->stat.ena); 969 event->stat.run = bswap_64(event->stat.run); 970 } 971 972 static void perf_event__stat_round_swap(union perf_event *event, 973 bool sample_id_all __maybe_unused) 974 { 975 event->stat_round.type = bswap_64(event->stat_round.type); 976 event->stat_round.time = bswap_64(event->stat_round.time); 977 } 978 979 static void perf_event__time_conv_swap(union perf_event *event, 980 bool sample_id_all __maybe_unused) 981 { 982 event->time_conv.time_shift = bswap_64(event->time_conv.time_shift); 983 event->time_conv.time_mult = bswap_64(event->time_conv.time_mult); 984 event->time_conv.time_zero = bswap_64(event->time_conv.time_zero); 985 986 if (event_contains(event->time_conv, time_cycles)) { 987 event->time_conv.time_cycles = bswap_64(event->time_conv.time_cycles); 988 event->time_conv.time_mask = bswap_64(event->time_conv.time_mask); 989 } 990 } 991 992 typedef void (*perf_event__swap_op)(union perf_event *event, 993 bool sample_id_all); 994 995 static perf_event__swap_op perf_event__swap_ops[] = { 996 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 997 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap, 998 [PERF_RECORD_COMM] = perf_event__comm_swap, 999 [PERF_RECORD_FORK] = perf_event__task_swap, 1000 [PERF_RECORD_EXIT] = perf_event__task_swap, 1001 [PERF_RECORD_LOST] = perf_event__all64_swap, 1002 [PERF_RECORD_READ] = perf_event__read_swap, 1003 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap, 1004 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap, 1005 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 1006 [PERF_RECORD_AUX] = perf_event__aux_swap, 1007 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap, 1008 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap, 1009 [PERF_RECORD_SWITCH] = perf_event__switch_swap, 1010 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap, 1011 [PERF_RECORD_NAMESPACES] = perf_event__namespaces_swap, 1012 [PERF_RECORD_CGROUP] = perf_event__cgroup_swap, 1013 [PERF_RECORD_TEXT_POKE] = perf_event__text_poke_swap, 1014 [PERF_RECORD_AUX_OUTPUT_HW_ID] = perf_event__all64_swap, 1015 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 1016 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 1017 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 1018 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 1019 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap, 1020 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap, 1021 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap, 1022 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap, 1023 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap, 1024 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap, 1025 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap, 1026 [PERF_RECORD_STAT] = perf_event__stat_swap, 1027 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap, 1028 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap, 1029 [PERF_RECORD_TIME_CONV] = perf_event__time_conv_swap, 1030 [PERF_RECORD_HEADER_MAX] = NULL, 1031 }; 1032 1033 /* 1034 * When perf record finishes a pass on every buffers, it records this pseudo 1035 * event. 1036 * We record the max timestamp t found in the pass n. 1037 * Assuming these timestamps are monotonic across cpus, we know that if 1038 * a buffer still has events with timestamps below t, they will be all 1039 * available and then read in the pass n + 1. 1040 * Hence when we start to read the pass n + 2, we can safely flush every 1041 * events with timestamps below t. 1042 * 1043 * ============ PASS n ================= 1044 * CPU 0 | CPU 1 1045 * | 1046 * cnt1 timestamps | cnt2 timestamps 1047 * 1 | 2 1048 * 2 | 3 1049 * - | 4 <--- max recorded 1050 * 1051 * ============ PASS n + 1 ============== 1052 * CPU 0 | CPU 1 1053 * | 1054 * cnt1 timestamps | cnt2 timestamps 1055 * 3 | 5 1056 * 4 | 6 1057 * 5 | 7 <---- max recorded 1058 * 1059 * Flush every events below timestamp 4 1060 * 1061 * ============ PASS n + 2 ============== 1062 * CPU 0 | CPU 1 1063 * | 1064 * cnt1 timestamps | cnt2 timestamps 1065 * 6 | 8 1066 * 7 | 9 1067 * - | 10 1068 * 1069 * Flush every events below timestamp 7 1070 * etc... 1071 */ 1072 static int process_finished_round(struct perf_tool *tool __maybe_unused, 1073 union perf_event *event __maybe_unused, 1074 struct ordered_events *oe) 1075 { 1076 if (dump_trace) 1077 fprintf(stdout, "\n"); 1078 return ordered_events__flush(oe, OE_FLUSH__ROUND); 1079 } 1080 1081 int perf_session__queue_event(struct perf_session *s, union perf_event *event, 1082 u64 timestamp, u64 file_offset, const char *file_path) 1083 { 1084 return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset, file_path); 1085 } 1086 1087 static void callchain__lbr_callstack_printf(struct perf_sample *sample) 1088 { 1089 struct ip_callchain *callchain = sample->callchain; 1090 struct branch_stack *lbr_stack = sample->branch_stack; 1091 struct branch_entry *entries = perf_sample__branch_entries(sample); 1092 u64 kernel_callchain_nr = callchain->nr; 1093 unsigned int i; 1094 1095 for (i = 0; i < kernel_callchain_nr; i++) { 1096 if (callchain->ips[i] == PERF_CONTEXT_USER) 1097 break; 1098 } 1099 1100 if ((i != kernel_callchain_nr) && lbr_stack->nr) { 1101 u64 total_nr; 1102 /* 1103 * LBR callstack can only get user call chain, 1104 * i is kernel call chain number, 1105 * 1 is PERF_CONTEXT_USER. 1106 * 1107 * The user call chain is stored in LBR registers. 1108 * LBR are pair registers. The caller is stored 1109 * in "from" register, while the callee is stored 1110 * in "to" register. 1111 * For example, there is a call stack 1112 * "A"->"B"->"C"->"D". 1113 * The LBR registers will be recorded like 1114 * "C"->"D", "B"->"C", "A"->"B". 1115 * So only the first "to" register and all "from" 1116 * registers are needed to construct the whole stack. 1117 */ 1118 total_nr = i + 1 + lbr_stack->nr + 1; 1119 kernel_callchain_nr = i + 1; 1120 1121 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr); 1122 1123 for (i = 0; i < kernel_callchain_nr; i++) 1124 printf("..... %2d: %016" PRIx64 "\n", 1125 i, callchain->ips[i]); 1126 1127 printf("..... %2d: %016" PRIx64 "\n", 1128 (int)(kernel_callchain_nr), entries[0].to); 1129 for (i = 0; i < lbr_stack->nr; i++) 1130 printf("..... %2d: %016" PRIx64 "\n", 1131 (int)(i + kernel_callchain_nr + 1), entries[i].from); 1132 } 1133 } 1134 1135 static void callchain__printf(struct evsel *evsel, 1136 struct perf_sample *sample) 1137 { 1138 unsigned int i; 1139 struct ip_callchain *callchain = sample->callchain; 1140 1141 if (evsel__has_branch_callstack(evsel)) 1142 callchain__lbr_callstack_printf(sample); 1143 1144 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr); 1145 1146 for (i = 0; i < callchain->nr; i++) 1147 printf("..... %2d: %016" PRIx64 "\n", 1148 i, callchain->ips[i]); 1149 } 1150 1151 static void branch_stack__printf(struct perf_sample *sample, bool callstack) 1152 { 1153 struct branch_entry *entries = perf_sample__branch_entries(sample); 1154 uint64_t i; 1155 1156 if (!callstack) { 1157 printf("%s: nr:%" PRIu64 "\n", "... branch stack", sample->branch_stack->nr); 1158 } else { 1159 /* the reason of adding 1 to nr is because after expanding 1160 * branch stack it generates nr + 1 callstack records. e.g., 1161 * B()->C() 1162 * A()->B() 1163 * the final callstack should be: 1164 * C() 1165 * B() 1166 * A() 1167 */ 1168 printf("%s: nr:%" PRIu64 "\n", "... branch callstack", sample->branch_stack->nr+1); 1169 } 1170 1171 for (i = 0; i < sample->branch_stack->nr; i++) { 1172 struct branch_entry *e = &entries[i]; 1173 1174 if (!callstack) { 1175 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x %s\n", 1176 i, e->from, e->to, 1177 (unsigned short)e->flags.cycles, 1178 e->flags.mispred ? "M" : " ", 1179 e->flags.predicted ? "P" : " ", 1180 e->flags.abort ? "A" : " ", 1181 e->flags.in_tx ? "T" : " ", 1182 (unsigned)e->flags.reserved, 1183 e->flags.type ? branch_type_name(e->flags.type) : ""); 1184 } else { 1185 if (i == 0) { 1186 printf("..... %2"PRIu64": %016" PRIx64 "\n" 1187 "..... %2"PRIu64": %016" PRIx64 "\n", 1188 i, e->to, i+1, e->from); 1189 } else { 1190 printf("..... %2"PRIu64": %016" PRIx64 "\n", i+1, e->from); 1191 } 1192 } 1193 } 1194 } 1195 1196 static void regs_dump__printf(u64 mask, u64 *regs, const char *arch) 1197 { 1198 unsigned rid, i = 0; 1199 1200 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { 1201 u64 val = regs[i++]; 1202 1203 printf(".... %-5s 0x%016" PRIx64 "\n", 1204 perf_reg_name(rid, arch), val); 1205 } 1206 } 1207 1208 static const char *regs_abi[] = { 1209 [PERF_SAMPLE_REGS_ABI_NONE] = "none", 1210 [PERF_SAMPLE_REGS_ABI_32] = "32-bit", 1211 [PERF_SAMPLE_REGS_ABI_64] = "64-bit", 1212 }; 1213 1214 static inline const char *regs_dump_abi(struct regs_dump *d) 1215 { 1216 if (d->abi > PERF_SAMPLE_REGS_ABI_64) 1217 return "unknown"; 1218 1219 return regs_abi[d->abi]; 1220 } 1221 1222 static void regs__printf(const char *type, struct regs_dump *regs, const char *arch) 1223 { 1224 u64 mask = regs->mask; 1225 1226 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n", 1227 type, 1228 mask, 1229 regs_dump_abi(regs)); 1230 1231 regs_dump__printf(mask, regs->regs, arch); 1232 } 1233 1234 static void regs_user__printf(struct perf_sample *sample, const char *arch) 1235 { 1236 struct regs_dump *user_regs = &sample->user_regs; 1237 1238 if (user_regs->regs) 1239 regs__printf("user", user_regs, arch); 1240 } 1241 1242 static void regs_intr__printf(struct perf_sample *sample, const char *arch) 1243 { 1244 struct regs_dump *intr_regs = &sample->intr_regs; 1245 1246 if (intr_regs->regs) 1247 regs__printf("intr", intr_regs, arch); 1248 } 1249 1250 static void stack_user__printf(struct stack_dump *dump) 1251 { 1252 printf("... ustack: size %" PRIu64 ", offset 0x%x\n", 1253 dump->size, dump->offset); 1254 } 1255 1256 static void evlist__print_tstamp(struct evlist *evlist, union perf_event *event, struct perf_sample *sample) 1257 { 1258 u64 sample_type = __evlist__combined_sample_type(evlist); 1259 1260 if (event->header.type != PERF_RECORD_SAMPLE && 1261 !evlist__sample_id_all(evlist)) { 1262 fputs("-1 -1 ", stdout); 1263 return; 1264 } 1265 1266 if ((sample_type & PERF_SAMPLE_CPU)) 1267 printf("%u ", sample->cpu); 1268 1269 if (sample_type & PERF_SAMPLE_TIME) 1270 printf("%" PRIu64 " ", sample->time); 1271 } 1272 1273 static void sample_read__printf(struct perf_sample *sample, u64 read_format) 1274 { 1275 printf("... sample_read:\n"); 1276 1277 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1278 printf("...... time enabled %016" PRIx64 "\n", 1279 sample->read.time_enabled); 1280 1281 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1282 printf("...... time running %016" PRIx64 "\n", 1283 sample->read.time_running); 1284 1285 if (read_format & PERF_FORMAT_GROUP) { 1286 u64 i; 1287 1288 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr); 1289 1290 for (i = 0; i < sample->read.group.nr; i++) { 1291 struct sample_read_value *value; 1292 1293 value = &sample->read.group.values[i]; 1294 printf("..... id %016" PRIx64 1295 ", value %016" PRIx64 "\n", 1296 value->id, value->value); 1297 } 1298 } else 1299 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n", 1300 sample->read.one.id, sample->read.one.value); 1301 } 1302 1303 static void dump_event(struct evlist *evlist, union perf_event *event, 1304 u64 file_offset, struct perf_sample *sample, 1305 const char *file_path) 1306 { 1307 if (!dump_trace) 1308 return; 1309 1310 printf("\n%#" PRIx64 "@%s [%#x]: event: %d\n", 1311 file_offset, file_path, event->header.size, event->header.type); 1312 1313 trace_event(event); 1314 if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw) 1315 evlist->trace_event_sample_raw(evlist, event, sample); 1316 1317 if (sample) 1318 evlist__print_tstamp(evlist, event, sample); 1319 1320 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 1321 event->header.size, perf_event__name(event->header.type)); 1322 } 1323 1324 char *get_page_size_name(u64 size, char *str) 1325 { 1326 if (!size || !unit_number__scnprintf(str, PAGE_SIZE_NAME_LEN, size)) 1327 snprintf(str, PAGE_SIZE_NAME_LEN, "%s", "N/A"); 1328 1329 return str; 1330 } 1331 1332 static void dump_sample(struct evsel *evsel, union perf_event *event, 1333 struct perf_sample *sample, const char *arch) 1334 { 1335 u64 sample_type; 1336 char str[PAGE_SIZE_NAME_LEN]; 1337 1338 if (!dump_trace) 1339 return; 1340 1341 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 1342 event->header.misc, sample->pid, sample->tid, sample->ip, 1343 sample->period, sample->addr); 1344 1345 sample_type = evsel->core.attr.sample_type; 1346 1347 if (evsel__has_callchain(evsel)) 1348 callchain__printf(evsel, sample); 1349 1350 if (evsel__has_br_stack(evsel)) 1351 branch_stack__printf(sample, evsel__has_branch_callstack(evsel)); 1352 1353 if (sample_type & PERF_SAMPLE_REGS_USER) 1354 regs_user__printf(sample, arch); 1355 1356 if (sample_type & PERF_SAMPLE_REGS_INTR) 1357 regs_intr__printf(sample, arch); 1358 1359 if (sample_type & PERF_SAMPLE_STACK_USER) 1360 stack_user__printf(&sample->user_stack); 1361 1362 if (sample_type & PERF_SAMPLE_WEIGHT_TYPE) { 1363 printf("... weight: %" PRIu64 "", sample->weight); 1364 if (sample_type & PERF_SAMPLE_WEIGHT_STRUCT) { 1365 printf(",0x%"PRIx16"", sample->ins_lat); 1366 printf(",0x%"PRIx16"", sample->p_stage_cyc); 1367 } 1368 printf("\n"); 1369 } 1370 1371 if (sample_type & PERF_SAMPLE_DATA_SRC) 1372 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src); 1373 1374 if (sample_type & PERF_SAMPLE_PHYS_ADDR) 1375 printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr); 1376 1377 if (sample_type & PERF_SAMPLE_DATA_PAGE_SIZE) 1378 printf(" .. data page size: %s\n", get_page_size_name(sample->data_page_size, str)); 1379 1380 if (sample_type & PERF_SAMPLE_CODE_PAGE_SIZE) 1381 printf(" .. code page size: %s\n", get_page_size_name(sample->code_page_size, str)); 1382 1383 if (sample_type & PERF_SAMPLE_TRANSACTION) 1384 printf("... transaction: %" PRIx64 "\n", sample->transaction); 1385 1386 if (sample_type & PERF_SAMPLE_READ) 1387 sample_read__printf(sample, evsel->core.attr.read_format); 1388 } 1389 1390 static void dump_read(struct evsel *evsel, union perf_event *event) 1391 { 1392 struct perf_record_read *read_event = &event->read; 1393 u64 read_format; 1394 1395 if (!dump_trace) 1396 return; 1397 1398 printf(": %d %d %s %" PRI_lu64 "\n", event->read.pid, event->read.tid, 1399 evsel__name(evsel), event->read.value); 1400 1401 if (!evsel) 1402 return; 1403 1404 read_format = evsel->core.attr.read_format; 1405 1406 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1407 printf("... time enabled : %" PRI_lu64 "\n", read_event->time_enabled); 1408 1409 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1410 printf("... time running : %" PRI_lu64 "\n", read_event->time_running); 1411 1412 if (read_format & PERF_FORMAT_ID) 1413 printf("... id : %" PRI_lu64 "\n", read_event->id); 1414 } 1415 1416 static struct machine *machines__find_for_cpumode(struct machines *machines, 1417 union perf_event *event, 1418 struct perf_sample *sample) 1419 { 1420 if (perf_guest && 1421 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 1422 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) { 1423 u32 pid; 1424 1425 if (event->header.type == PERF_RECORD_MMAP 1426 || event->header.type == PERF_RECORD_MMAP2) 1427 pid = event->mmap.pid; 1428 else 1429 pid = sample->pid; 1430 1431 /* 1432 * Guest code machine is created as needed and does not use 1433 * DEFAULT_GUEST_KERNEL_ID. 1434 */ 1435 if (symbol_conf.guest_code) 1436 return machines__findnew(machines, pid); 1437 1438 return machines__find_guest(machines, pid); 1439 } 1440 1441 return &machines->host; 1442 } 1443 1444 static int deliver_sample_value(struct evlist *evlist, 1445 struct perf_tool *tool, 1446 union perf_event *event, 1447 struct perf_sample *sample, 1448 struct sample_read_value *v, 1449 struct machine *machine) 1450 { 1451 struct perf_sample_id *sid = evlist__id2sid(evlist, v->id); 1452 struct evsel *evsel; 1453 1454 if (sid) { 1455 sample->id = v->id; 1456 sample->period = v->value - sid->period; 1457 sid->period = v->value; 1458 } 1459 1460 if (!sid || sid->evsel == NULL) { 1461 ++evlist->stats.nr_unknown_id; 1462 return 0; 1463 } 1464 1465 /* 1466 * There's no reason to deliver sample 1467 * for zero period, bail out. 1468 */ 1469 if (!sample->period) 1470 return 0; 1471 1472 evsel = container_of(sid->evsel, struct evsel, core); 1473 return tool->sample(tool, event, sample, evsel, machine); 1474 } 1475 1476 static int deliver_sample_group(struct evlist *evlist, 1477 struct perf_tool *tool, 1478 union perf_event *event, 1479 struct perf_sample *sample, 1480 struct machine *machine) 1481 { 1482 int ret = -EINVAL; 1483 u64 i; 1484 1485 for (i = 0; i < sample->read.group.nr; i++) { 1486 ret = deliver_sample_value(evlist, tool, event, sample, 1487 &sample->read.group.values[i], 1488 machine); 1489 if (ret) 1490 break; 1491 } 1492 1493 return ret; 1494 } 1495 1496 static int evlist__deliver_sample(struct evlist *evlist, struct perf_tool *tool, 1497 union perf_event *event, struct perf_sample *sample, 1498 struct evsel *evsel, struct machine *machine) 1499 { 1500 /* We know evsel != NULL. */ 1501 u64 sample_type = evsel->core.attr.sample_type; 1502 u64 read_format = evsel->core.attr.read_format; 1503 1504 /* Standard sample delivery. */ 1505 if (!(sample_type & PERF_SAMPLE_READ)) 1506 return tool->sample(tool, event, sample, evsel, machine); 1507 1508 /* For PERF_SAMPLE_READ we have either single or group mode. */ 1509 if (read_format & PERF_FORMAT_GROUP) 1510 return deliver_sample_group(evlist, tool, event, sample, 1511 machine); 1512 else 1513 return deliver_sample_value(evlist, tool, event, sample, 1514 &sample->read.one, machine); 1515 } 1516 1517 static int machines__deliver_event(struct machines *machines, 1518 struct evlist *evlist, 1519 union perf_event *event, 1520 struct perf_sample *sample, 1521 struct perf_tool *tool, u64 file_offset, 1522 const char *file_path) 1523 { 1524 struct evsel *evsel; 1525 struct machine *machine; 1526 1527 dump_event(evlist, event, file_offset, sample, file_path); 1528 1529 evsel = evlist__id2evsel(evlist, sample->id); 1530 1531 machine = machines__find_for_cpumode(machines, event, sample); 1532 1533 switch (event->header.type) { 1534 case PERF_RECORD_SAMPLE: 1535 if (evsel == NULL) { 1536 ++evlist->stats.nr_unknown_id; 1537 return 0; 1538 } 1539 if (machine == NULL) { 1540 ++evlist->stats.nr_unprocessable_samples; 1541 dump_sample(evsel, event, sample, perf_env__arch(NULL)); 1542 return 0; 1543 } 1544 dump_sample(evsel, event, sample, perf_env__arch(machine->env)); 1545 return evlist__deliver_sample(evlist, tool, event, sample, evsel, machine); 1546 case PERF_RECORD_MMAP: 1547 return tool->mmap(tool, event, sample, machine); 1548 case PERF_RECORD_MMAP2: 1549 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT) 1550 ++evlist->stats.nr_proc_map_timeout; 1551 return tool->mmap2(tool, event, sample, machine); 1552 case PERF_RECORD_COMM: 1553 return tool->comm(tool, event, sample, machine); 1554 case PERF_RECORD_NAMESPACES: 1555 return tool->namespaces(tool, event, sample, machine); 1556 case PERF_RECORD_CGROUP: 1557 return tool->cgroup(tool, event, sample, machine); 1558 case PERF_RECORD_FORK: 1559 return tool->fork(tool, event, sample, machine); 1560 case PERF_RECORD_EXIT: 1561 return tool->exit(tool, event, sample, machine); 1562 case PERF_RECORD_LOST: 1563 if (tool->lost == perf_event__process_lost) 1564 evlist->stats.total_lost += event->lost.lost; 1565 return tool->lost(tool, event, sample, machine); 1566 case PERF_RECORD_LOST_SAMPLES: 1567 if (tool->lost_samples == perf_event__process_lost_samples) 1568 evlist->stats.total_lost_samples += event->lost_samples.lost; 1569 return tool->lost_samples(tool, event, sample, machine); 1570 case PERF_RECORD_READ: 1571 dump_read(evsel, event); 1572 return tool->read(tool, event, sample, evsel, machine); 1573 case PERF_RECORD_THROTTLE: 1574 return tool->throttle(tool, event, sample, machine); 1575 case PERF_RECORD_UNTHROTTLE: 1576 return tool->unthrottle(tool, event, sample, machine); 1577 case PERF_RECORD_AUX: 1578 if (tool->aux == perf_event__process_aux) { 1579 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) 1580 evlist->stats.total_aux_lost += 1; 1581 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL) 1582 evlist->stats.total_aux_partial += 1; 1583 if (event->aux.flags & PERF_AUX_FLAG_COLLISION) 1584 evlist->stats.total_aux_collision += 1; 1585 } 1586 return tool->aux(tool, event, sample, machine); 1587 case PERF_RECORD_ITRACE_START: 1588 return tool->itrace_start(tool, event, sample, machine); 1589 case PERF_RECORD_SWITCH: 1590 case PERF_RECORD_SWITCH_CPU_WIDE: 1591 return tool->context_switch(tool, event, sample, machine); 1592 case PERF_RECORD_KSYMBOL: 1593 return tool->ksymbol(tool, event, sample, machine); 1594 case PERF_RECORD_BPF_EVENT: 1595 return tool->bpf(tool, event, sample, machine); 1596 case PERF_RECORD_TEXT_POKE: 1597 return tool->text_poke(tool, event, sample, machine); 1598 case PERF_RECORD_AUX_OUTPUT_HW_ID: 1599 return tool->aux_output_hw_id(tool, event, sample, machine); 1600 default: 1601 ++evlist->stats.nr_unknown_events; 1602 return -1; 1603 } 1604 } 1605 1606 static int perf_session__deliver_event(struct perf_session *session, 1607 union perf_event *event, 1608 struct perf_tool *tool, 1609 u64 file_offset, 1610 const char *file_path) 1611 { 1612 struct perf_sample sample; 1613 int ret = evlist__parse_sample(session->evlist, event, &sample); 1614 1615 if (ret) { 1616 pr_err("Can't parse sample, err = %d\n", ret); 1617 return ret; 1618 } 1619 1620 ret = auxtrace__process_event(session, event, &sample, tool); 1621 if (ret < 0) 1622 return ret; 1623 if (ret > 0) 1624 return 0; 1625 1626 ret = machines__deliver_event(&session->machines, session->evlist, 1627 event, &sample, tool, file_offset, file_path); 1628 1629 if (dump_trace && sample.aux_sample.size) 1630 auxtrace__dump_auxtrace_sample(session, &sample); 1631 1632 return ret; 1633 } 1634 1635 static s64 perf_session__process_user_event(struct perf_session *session, 1636 union perf_event *event, 1637 u64 file_offset, 1638 const char *file_path) 1639 { 1640 struct ordered_events *oe = &session->ordered_events; 1641 struct perf_tool *tool = session->tool; 1642 struct perf_sample sample = { .time = 0, }; 1643 int fd = perf_data__fd(session->data); 1644 int err; 1645 1646 if (event->header.type != PERF_RECORD_COMPRESSED || 1647 tool->compressed == perf_session__process_compressed_event_stub) 1648 dump_event(session->evlist, event, file_offset, &sample, file_path); 1649 1650 /* These events are processed right away */ 1651 switch (event->header.type) { 1652 case PERF_RECORD_HEADER_ATTR: 1653 err = tool->attr(tool, event, &session->evlist); 1654 if (err == 0) { 1655 perf_session__set_id_hdr_size(session); 1656 perf_session__set_comm_exec(session); 1657 } 1658 return err; 1659 case PERF_RECORD_EVENT_UPDATE: 1660 return tool->event_update(tool, event, &session->evlist); 1661 case PERF_RECORD_HEADER_EVENT_TYPE: 1662 /* 1663 * Deprecated, but we need to handle it for sake 1664 * of old data files create in pipe mode. 1665 */ 1666 return 0; 1667 case PERF_RECORD_HEADER_TRACING_DATA: 1668 /* 1669 * Setup for reading amidst mmap, but only when we 1670 * are in 'file' mode. The 'pipe' fd is in proper 1671 * place already. 1672 */ 1673 if (!perf_data__is_pipe(session->data)) 1674 lseek(fd, file_offset, SEEK_SET); 1675 return tool->tracing_data(session, event); 1676 case PERF_RECORD_HEADER_BUILD_ID: 1677 return tool->build_id(session, event); 1678 case PERF_RECORD_FINISHED_ROUND: 1679 return tool->finished_round(tool, event, oe); 1680 case PERF_RECORD_ID_INDEX: 1681 return tool->id_index(session, event); 1682 case PERF_RECORD_AUXTRACE_INFO: 1683 return tool->auxtrace_info(session, event); 1684 case PERF_RECORD_AUXTRACE: 1685 /* setup for reading amidst mmap */ 1686 lseek(fd, file_offset + event->header.size, SEEK_SET); 1687 return tool->auxtrace(session, event); 1688 case PERF_RECORD_AUXTRACE_ERROR: 1689 perf_session__auxtrace_error_inc(session, event); 1690 return tool->auxtrace_error(session, event); 1691 case PERF_RECORD_THREAD_MAP: 1692 return tool->thread_map(session, event); 1693 case PERF_RECORD_CPU_MAP: 1694 return tool->cpu_map(session, event); 1695 case PERF_RECORD_STAT_CONFIG: 1696 return tool->stat_config(session, event); 1697 case PERF_RECORD_STAT: 1698 return tool->stat(session, event); 1699 case PERF_RECORD_STAT_ROUND: 1700 return tool->stat_round(session, event); 1701 case PERF_RECORD_TIME_CONV: 1702 session->time_conv = event->time_conv; 1703 return tool->time_conv(session, event); 1704 case PERF_RECORD_HEADER_FEATURE: 1705 return tool->feature(session, event); 1706 case PERF_RECORD_COMPRESSED: 1707 err = tool->compressed(session, event, file_offset, file_path); 1708 if (err) 1709 dump_event(session->evlist, event, file_offset, &sample, file_path); 1710 return err; 1711 case PERF_RECORD_FINISHED_INIT: 1712 return tool->finished_init(session, event); 1713 default: 1714 return -EINVAL; 1715 } 1716 } 1717 1718 int perf_session__deliver_synth_event(struct perf_session *session, 1719 union perf_event *event, 1720 struct perf_sample *sample) 1721 { 1722 struct evlist *evlist = session->evlist; 1723 struct perf_tool *tool = session->tool; 1724 1725 events_stats__inc(&evlist->stats, event->header.type); 1726 1727 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1728 return perf_session__process_user_event(session, event, 0, NULL); 1729 1730 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0, NULL); 1731 } 1732 1733 static void event_swap(union perf_event *event, bool sample_id_all) 1734 { 1735 perf_event__swap_op swap; 1736 1737 swap = perf_event__swap_ops[event->header.type]; 1738 if (swap) 1739 swap(event, sample_id_all); 1740 } 1741 1742 int perf_session__peek_event(struct perf_session *session, off_t file_offset, 1743 void *buf, size_t buf_sz, 1744 union perf_event **event_ptr, 1745 struct perf_sample *sample) 1746 { 1747 union perf_event *event; 1748 size_t hdr_sz, rest; 1749 int fd; 1750 1751 if (session->one_mmap && !session->header.needs_swap) { 1752 event = file_offset - session->one_mmap_offset + 1753 session->one_mmap_addr; 1754 goto out_parse_sample; 1755 } 1756 1757 if (perf_data__is_pipe(session->data)) 1758 return -1; 1759 1760 fd = perf_data__fd(session->data); 1761 hdr_sz = sizeof(struct perf_event_header); 1762 1763 if (buf_sz < hdr_sz) 1764 return -1; 1765 1766 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 || 1767 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz) 1768 return -1; 1769 1770 event = (union perf_event *)buf; 1771 1772 if (session->header.needs_swap) 1773 perf_event_header__bswap(&event->header); 1774 1775 if (event->header.size < hdr_sz || event->header.size > buf_sz) 1776 return -1; 1777 1778 buf += hdr_sz; 1779 rest = event->header.size - hdr_sz; 1780 1781 if (readn(fd, buf, rest) != (ssize_t)rest) 1782 return -1; 1783 1784 if (session->header.needs_swap) 1785 event_swap(event, evlist__sample_id_all(session->evlist)); 1786 1787 out_parse_sample: 1788 1789 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START && 1790 evlist__parse_sample(session->evlist, event, sample)) 1791 return -1; 1792 1793 *event_ptr = event; 1794 1795 return 0; 1796 } 1797 1798 int perf_session__peek_events(struct perf_session *session, u64 offset, 1799 u64 size, peek_events_cb_t cb, void *data) 1800 { 1801 u64 max_offset = offset + size; 1802 char buf[PERF_SAMPLE_MAX_SIZE]; 1803 union perf_event *event; 1804 int err; 1805 1806 do { 1807 err = perf_session__peek_event(session, offset, buf, 1808 PERF_SAMPLE_MAX_SIZE, &event, 1809 NULL); 1810 if (err) 1811 return err; 1812 1813 err = cb(session, event, offset, data); 1814 if (err) 1815 return err; 1816 1817 offset += event->header.size; 1818 if (event->header.type == PERF_RECORD_AUXTRACE) 1819 offset += event->auxtrace.size; 1820 1821 } while (offset < max_offset); 1822 1823 return err; 1824 } 1825 1826 static s64 perf_session__process_event(struct perf_session *session, 1827 union perf_event *event, u64 file_offset, 1828 const char *file_path) 1829 { 1830 struct evlist *evlist = session->evlist; 1831 struct perf_tool *tool = session->tool; 1832 int ret; 1833 1834 if (session->header.needs_swap) 1835 event_swap(event, evlist__sample_id_all(evlist)); 1836 1837 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1838 return -EINVAL; 1839 1840 events_stats__inc(&evlist->stats, event->header.type); 1841 1842 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1843 return perf_session__process_user_event(session, event, file_offset, file_path); 1844 1845 if (tool->ordered_events) { 1846 u64 timestamp = -1ULL; 1847 1848 ret = evlist__parse_sample_timestamp(evlist, event, ×tamp); 1849 if (ret && ret != -1) 1850 return ret; 1851 1852 ret = perf_session__queue_event(session, event, timestamp, file_offset, file_path); 1853 if (ret != -ETIME) 1854 return ret; 1855 } 1856 1857 return perf_session__deliver_event(session, event, tool, file_offset, file_path); 1858 } 1859 1860 void perf_event_header__bswap(struct perf_event_header *hdr) 1861 { 1862 hdr->type = bswap_32(hdr->type); 1863 hdr->misc = bswap_16(hdr->misc); 1864 hdr->size = bswap_16(hdr->size); 1865 } 1866 1867 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1868 { 1869 return machine__findnew_thread(&session->machines.host, -1, pid); 1870 } 1871 1872 int perf_session__register_idle_thread(struct perf_session *session) 1873 { 1874 struct thread *thread = machine__idle_thread(&session->machines.host); 1875 1876 /* machine__idle_thread() got the thread, so put it */ 1877 thread__put(thread); 1878 return thread ? 0 : -1; 1879 } 1880 1881 static void 1882 perf_session__warn_order(const struct perf_session *session) 1883 { 1884 const struct ordered_events *oe = &session->ordered_events; 1885 struct evsel *evsel; 1886 bool should_warn = true; 1887 1888 evlist__for_each_entry(session->evlist, evsel) { 1889 if (evsel->core.attr.write_backward) 1890 should_warn = false; 1891 } 1892 1893 if (!should_warn) 1894 return; 1895 if (oe->nr_unordered_events != 0) 1896 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events); 1897 } 1898 1899 static void perf_session__warn_about_errors(const struct perf_session *session) 1900 { 1901 const struct events_stats *stats = &session->evlist->stats; 1902 1903 if (session->tool->lost == perf_event__process_lost && 1904 stats->nr_events[PERF_RECORD_LOST] != 0) { 1905 ui__warning("Processed %d events and lost %d chunks!\n\n" 1906 "Check IO/CPU overload!\n\n", 1907 stats->nr_events[0], 1908 stats->nr_events[PERF_RECORD_LOST]); 1909 } 1910 1911 if (session->tool->lost_samples == perf_event__process_lost_samples) { 1912 double drop_rate; 1913 1914 drop_rate = (double)stats->total_lost_samples / 1915 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples); 1916 if (drop_rate > 0.05) { 1917 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n", 1918 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples, 1919 drop_rate * 100.0); 1920 } 1921 } 1922 1923 if (session->tool->aux == perf_event__process_aux && 1924 stats->total_aux_lost != 0) { 1925 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n", 1926 stats->total_aux_lost, 1927 stats->nr_events[PERF_RECORD_AUX]); 1928 } 1929 1930 if (session->tool->aux == perf_event__process_aux && 1931 stats->total_aux_partial != 0) { 1932 bool vmm_exclusive = false; 1933 1934 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive", 1935 &vmm_exclusive); 1936 1937 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n" 1938 "Are you running a KVM guest in the background?%s\n\n", 1939 stats->total_aux_partial, 1940 stats->nr_events[PERF_RECORD_AUX], 1941 vmm_exclusive ? 1942 "\nReloading kvm_intel module with vmm_exclusive=0\n" 1943 "will reduce the gaps to only guest's timeslices." : 1944 ""); 1945 } 1946 1947 if (session->tool->aux == perf_event__process_aux && 1948 stats->total_aux_collision != 0) { 1949 ui__warning("AUX data detected collision %" PRIu64 " times out of %u!\n\n", 1950 stats->total_aux_collision, 1951 stats->nr_events[PERF_RECORD_AUX]); 1952 } 1953 1954 if (stats->nr_unknown_events != 0) { 1955 ui__warning("Found %u unknown events!\n\n" 1956 "Is this an older tool processing a perf.data " 1957 "file generated by a more recent tool?\n\n" 1958 "If that is not the case, consider " 1959 "reporting to linux-kernel@vger.kernel.org.\n\n", 1960 stats->nr_unknown_events); 1961 } 1962 1963 if (stats->nr_unknown_id != 0) { 1964 ui__warning("%u samples with id not present in the header\n", 1965 stats->nr_unknown_id); 1966 } 1967 1968 if (stats->nr_invalid_chains != 0) { 1969 ui__warning("Found invalid callchains!\n\n" 1970 "%u out of %u events were discarded for this reason.\n\n" 1971 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1972 stats->nr_invalid_chains, 1973 stats->nr_events[PERF_RECORD_SAMPLE]); 1974 } 1975 1976 if (stats->nr_unprocessable_samples != 0) { 1977 ui__warning("%u unprocessable samples recorded.\n" 1978 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1979 stats->nr_unprocessable_samples); 1980 } 1981 1982 perf_session__warn_order(session); 1983 1984 events_stats__auxtrace_error_warn(stats); 1985 1986 if (stats->nr_proc_map_timeout != 0) { 1987 ui__warning("%d map information files for pre-existing threads were\n" 1988 "not processed, if there are samples for addresses they\n" 1989 "will not be resolved, you may find out which are these\n" 1990 "threads by running with -v and redirecting the output\n" 1991 "to a file.\n" 1992 "The time limit to process proc map is too short?\n" 1993 "Increase it by --proc-map-timeout\n", 1994 stats->nr_proc_map_timeout); 1995 } 1996 } 1997 1998 static int perf_session__flush_thread_stack(struct thread *thread, 1999 void *p __maybe_unused) 2000 { 2001 return thread_stack__flush(thread); 2002 } 2003 2004 static int perf_session__flush_thread_stacks(struct perf_session *session) 2005 { 2006 return machines__for_each_thread(&session->machines, 2007 perf_session__flush_thread_stack, 2008 NULL); 2009 } 2010 2011 volatile int session_done; 2012 2013 static int __perf_session__process_decomp_events(struct perf_session *session); 2014 2015 static int __perf_session__process_pipe_events(struct perf_session *session) 2016 { 2017 struct ordered_events *oe = &session->ordered_events; 2018 struct perf_tool *tool = session->tool; 2019 union perf_event *event; 2020 uint32_t size, cur_size = 0; 2021 void *buf = NULL; 2022 s64 skip = 0; 2023 u64 head; 2024 ssize_t err; 2025 void *p; 2026 2027 perf_tool__fill_defaults(tool); 2028 2029 head = 0; 2030 cur_size = sizeof(union perf_event); 2031 2032 buf = malloc(cur_size); 2033 if (!buf) 2034 return -errno; 2035 ordered_events__set_copy_on_queue(oe, true); 2036 more: 2037 event = buf; 2038 err = perf_data__read(session->data, event, 2039 sizeof(struct perf_event_header)); 2040 if (err <= 0) { 2041 if (err == 0) 2042 goto done; 2043 2044 pr_err("failed to read event header\n"); 2045 goto out_err; 2046 } 2047 2048 if (session->header.needs_swap) 2049 perf_event_header__bswap(&event->header); 2050 2051 size = event->header.size; 2052 if (size < sizeof(struct perf_event_header)) { 2053 pr_err("bad event header size\n"); 2054 goto out_err; 2055 } 2056 2057 if (size > cur_size) { 2058 void *new = realloc(buf, size); 2059 if (!new) { 2060 pr_err("failed to allocate memory to read event\n"); 2061 goto out_err; 2062 } 2063 buf = new; 2064 cur_size = size; 2065 event = buf; 2066 } 2067 p = event; 2068 p += sizeof(struct perf_event_header); 2069 2070 if (size - sizeof(struct perf_event_header)) { 2071 err = perf_data__read(session->data, p, 2072 size - sizeof(struct perf_event_header)); 2073 if (err <= 0) { 2074 if (err == 0) { 2075 pr_err("unexpected end of event stream\n"); 2076 goto done; 2077 } 2078 2079 pr_err("failed to read event data\n"); 2080 goto out_err; 2081 } 2082 } 2083 2084 if ((skip = perf_session__process_event(session, event, head, "pipe")) < 0) { 2085 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 2086 head, event->header.size, event->header.type); 2087 err = -EINVAL; 2088 goto out_err; 2089 } 2090 2091 head += size; 2092 2093 if (skip > 0) 2094 head += skip; 2095 2096 err = __perf_session__process_decomp_events(session); 2097 if (err) 2098 goto out_err; 2099 2100 if (!session_done()) 2101 goto more; 2102 done: 2103 /* do the final flush for ordered samples */ 2104 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 2105 if (err) 2106 goto out_err; 2107 err = auxtrace__flush_events(session, tool); 2108 if (err) 2109 goto out_err; 2110 err = perf_session__flush_thread_stacks(session); 2111 out_err: 2112 free(buf); 2113 if (!tool->no_warn) 2114 perf_session__warn_about_errors(session); 2115 ordered_events__free(&session->ordered_events); 2116 auxtrace__free_events(session); 2117 return err; 2118 } 2119 2120 static union perf_event * 2121 prefetch_event(char *buf, u64 head, size_t mmap_size, 2122 bool needs_swap, union perf_event *error) 2123 { 2124 union perf_event *event; 2125 u16 event_size; 2126 2127 /* 2128 * Ensure we have enough space remaining to read 2129 * the size of the event in the headers. 2130 */ 2131 if (head + sizeof(event->header) > mmap_size) 2132 return NULL; 2133 2134 event = (union perf_event *)(buf + head); 2135 if (needs_swap) 2136 perf_event_header__bswap(&event->header); 2137 2138 event_size = event->header.size; 2139 if (head + event_size <= mmap_size) 2140 return event; 2141 2142 /* We're not fetching the event so swap back again */ 2143 if (needs_swap) 2144 perf_event_header__bswap(&event->header); 2145 2146 /* Check if the event fits into the next mmapped buf. */ 2147 if (event_size <= mmap_size - head % page_size) { 2148 /* Remap buf and fetch again. */ 2149 return NULL; 2150 } 2151 2152 /* Invalid input. Event size should never exceed mmap_size. */ 2153 pr_debug("%s: head=%#" PRIx64 " event->header.size=%#x, mmap_size=%#zx:" 2154 " fuzzed or compressed perf.data?\n", __func__, head, event_size, mmap_size); 2155 2156 return error; 2157 } 2158 2159 static union perf_event * 2160 fetch_mmaped_event(u64 head, size_t mmap_size, char *buf, bool needs_swap) 2161 { 2162 return prefetch_event(buf, head, mmap_size, needs_swap, ERR_PTR(-EINVAL)); 2163 } 2164 2165 static union perf_event * 2166 fetch_decomp_event(u64 head, size_t mmap_size, char *buf, bool needs_swap) 2167 { 2168 return prefetch_event(buf, head, mmap_size, needs_swap, NULL); 2169 } 2170 2171 static int __perf_session__process_decomp_events(struct perf_session *session) 2172 { 2173 s64 skip; 2174 u64 size; 2175 struct decomp *decomp = session->active_decomp->decomp_last; 2176 2177 if (!decomp) 2178 return 0; 2179 2180 while (decomp->head < decomp->size && !session_done()) { 2181 union perf_event *event = fetch_decomp_event(decomp->head, decomp->size, decomp->data, 2182 session->header.needs_swap); 2183 2184 if (!event) 2185 break; 2186 2187 size = event->header.size; 2188 2189 if (size < sizeof(struct perf_event_header) || 2190 (skip = perf_session__process_event(session, event, decomp->file_pos, 2191 decomp->file_path)) < 0) { 2192 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 2193 decomp->file_pos + decomp->head, event->header.size, event->header.type); 2194 return -EINVAL; 2195 } 2196 2197 if (skip) 2198 size += skip; 2199 2200 decomp->head += size; 2201 } 2202 2203 return 0; 2204 } 2205 2206 /* 2207 * On 64bit we can mmap the data file in one go. No need for tiny mmap 2208 * slices. On 32bit we use 32MB. 2209 */ 2210 #if BITS_PER_LONG == 64 2211 #define MMAP_SIZE ULLONG_MAX 2212 #define NUM_MMAPS 1 2213 #else 2214 #define MMAP_SIZE (32 * 1024 * 1024ULL) 2215 #define NUM_MMAPS 128 2216 #endif 2217 2218 struct reader; 2219 2220 typedef s64 (*reader_cb_t)(struct perf_session *session, 2221 union perf_event *event, 2222 u64 file_offset, 2223 const char *file_path); 2224 2225 struct reader { 2226 int fd; 2227 const char *path; 2228 u64 data_size; 2229 u64 data_offset; 2230 reader_cb_t process; 2231 bool in_place_update; 2232 char *mmaps[NUM_MMAPS]; 2233 size_t mmap_size; 2234 int mmap_idx; 2235 char *mmap_cur; 2236 u64 file_pos; 2237 u64 file_offset; 2238 u64 head; 2239 u64 size; 2240 bool done; 2241 struct zstd_data zstd_data; 2242 struct decomp_data decomp_data; 2243 }; 2244 2245 static int 2246 reader__init(struct reader *rd, bool *one_mmap) 2247 { 2248 u64 data_size = rd->data_size; 2249 char **mmaps = rd->mmaps; 2250 2251 rd->head = rd->data_offset; 2252 data_size += rd->data_offset; 2253 2254 rd->mmap_size = MMAP_SIZE; 2255 if (rd->mmap_size > data_size) { 2256 rd->mmap_size = data_size; 2257 if (one_mmap) 2258 *one_mmap = true; 2259 } 2260 2261 memset(mmaps, 0, sizeof(rd->mmaps)); 2262 2263 if (zstd_init(&rd->zstd_data, 0)) 2264 return -1; 2265 rd->decomp_data.zstd_decomp = &rd->zstd_data; 2266 2267 return 0; 2268 } 2269 2270 static void 2271 reader__release_decomp(struct reader *rd) 2272 { 2273 perf_decomp__release_events(rd->decomp_data.decomp); 2274 zstd_fini(&rd->zstd_data); 2275 } 2276 2277 static int 2278 reader__mmap(struct reader *rd, struct perf_session *session) 2279 { 2280 int mmap_prot, mmap_flags; 2281 char *buf, **mmaps = rd->mmaps; 2282 u64 page_offset; 2283 2284 mmap_prot = PROT_READ; 2285 mmap_flags = MAP_SHARED; 2286 2287 if (rd->in_place_update) { 2288 mmap_prot |= PROT_WRITE; 2289 } else if (session->header.needs_swap) { 2290 mmap_prot |= PROT_WRITE; 2291 mmap_flags = MAP_PRIVATE; 2292 } 2293 2294 if (mmaps[rd->mmap_idx]) { 2295 munmap(mmaps[rd->mmap_idx], rd->mmap_size); 2296 mmaps[rd->mmap_idx] = NULL; 2297 } 2298 2299 page_offset = page_size * (rd->head / page_size); 2300 rd->file_offset += page_offset; 2301 rd->head -= page_offset; 2302 2303 buf = mmap(NULL, rd->mmap_size, mmap_prot, mmap_flags, rd->fd, 2304 rd->file_offset); 2305 if (buf == MAP_FAILED) { 2306 pr_err("failed to mmap file\n"); 2307 return -errno; 2308 } 2309 mmaps[rd->mmap_idx] = rd->mmap_cur = buf; 2310 rd->mmap_idx = (rd->mmap_idx + 1) & (ARRAY_SIZE(rd->mmaps) - 1); 2311 rd->file_pos = rd->file_offset + rd->head; 2312 if (session->one_mmap) { 2313 session->one_mmap_addr = buf; 2314 session->one_mmap_offset = rd->file_offset; 2315 } 2316 2317 return 0; 2318 } 2319 2320 enum { 2321 READER_OK, 2322 READER_NODATA, 2323 }; 2324 2325 static int 2326 reader__read_event(struct reader *rd, struct perf_session *session, 2327 struct ui_progress *prog) 2328 { 2329 u64 size; 2330 int err = READER_OK; 2331 union perf_event *event; 2332 s64 skip; 2333 2334 event = fetch_mmaped_event(rd->head, rd->mmap_size, rd->mmap_cur, 2335 session->header.needs_swap); 2336 if (IS_ERR(event)) 2337 return PTR_ERR(event); 2338 2339 if (!event) 2340 return READER_NODATA; 2341 2342 size = event->header.size; 2343 2344 skip = -EINVAL; 2345 2346 if (size < sizeof(struct perf_event_header) || 2347 (skip = rd->process(session, event, rd->file_pos, rd->path)) < 0) { 2348 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n", 2349 rd->file_offset + rd->head, event->header.size, 2350 event->header.type, strerror(-skip)); 2351 err = skip; 2352 goto out; 2353 } 2354 2355 if (skip) 2356 size += skip; 2357 2358 rd->size += size; 2359 rd->head += size; 2360 rd->file_pos += size; 2361 2362 err = __perf_session__process_decomp_events(session); 2363 if (err) 2364 goto out; 2365 2366 ui_progress__update(prog, size); 2367 2368 out: 2369 return err; 2370 } 2371 2372 static inline bool 2373 reader__eof(struct reader *rd) 2374 { 2375 return (rd->file_pos >= rd->data_size + rd->data_offset); 2376 } 2377 2378 static int 2379 reader__process_events(struct reader *rd, struct perf_session *session, 2380 struct ui_progress *prog) 2381 { 2382 int err; 2383 2384 err = reader__init(rd, &session->one_mmap); 2385 if (err) 2386 goto out; 2387 2388 session->active_decomp = &rd->decomp_data; 2389 2390 remap: 2391 err = reader__mmap(rd, session); 2392 if (err) 2393 goto out; 2394 2395 more: 2396 err = reader__read_event(rd, session, prog); 2397 if (err < 0) 2398 goto out; 2399 else if (err == READER_NODATA) 2400 goto remap; 2401 2402 if (session_done()) 2403 goto out; 2404 2405 if (!reader__eof(rd)) 2406 goto more; 2407 2408 out: 2409 session->active_decomp = &session->decomp_data; 2410 return err; 2411 } 2412 2413 static s64 process_simple(struct perf_session *session, 2414 union perf_event *event, 2415 u64 file_offset, 2416 const char *file_path) 2417 { 2418 return perf_session__process_event(session, event, file_offset, file_path); 2419 } 2420 2421 static int __perf_session__process_events(struct perf_session *session) 2422 { 2423 struct reader rd = { 2424 .fd = perf_data__fd(session->data), 2425 .path = session->data->file.path, 2426 .data_size = session->header.data_size, 2427 .data_offset = session->header.data_offset, 2428 .process = process_simple, 2429 .in_place_update = session->data->in_place_update, 2430 }; 2431 struct ordered_events *oe = &session->ordered_events; 2432 struct perf_tool *tool = session->tool; 2433 struct ui_progress prog; 2434 int err; 2435 2436 perf_tool__fill_defaults(tool); 2437 2438 if (rd.data_size == 0) 2439 return -1; 2440 2441 ui_progress__init_size(&prog, rd.data_size, "Processing events..."); 2442 2443 err = reader__process_events(&rd, session, &prog); 2444 if (err) 2445 goto out_err; 2446 /* do the final flush for ordered samples */ 2447 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 2448 if (err) 2449 goto out_err; 2450 err = auxtrace__flush_events(session, tool); 2451 if (err) 2452 goto out_err; 2453 err = perf_session__flush_thread_stacks(session); 2454 out_err: 2455 ui_progress__finish(); 2456 if (!tool->no_warn) 2457 perf_session__warn_about_errors(session); 2458 /* 2459 * We may switching perf.data output, make ordered_events 2460 * reusable. 2461 */ 2462 ordered_events__reinit(&session->ordered_events); 2463 auxtrace__free_events(session); 2464 reader__release_decomp(&rd); 2465 session->one_mmap = false; 2466 return err; 2467 } 2468 2469 /* 2470 * Processing 2 MB of data from each reader in sequence, 2471 * because that's the way the ordered events sorting works 2472 * most efficiently. 2473 */ 2474 #define READER_MAX_SIZE (2 * 1024 * 1024) 2475 2476 /* 2477 * This function reads, merge and process directory data. 2478 * It assumens the version 1 of directory data, where each 2479 * data file holds per-cpu data, already sorted by kernel. 2480 */ 2481 static int __perf_session__process_dir_events(struct perf_session *session) 2482 { 2483 struct perf_data *data = session->data; 2484 struct perf_tool *tool = session->tool; 2485 int i, ret, readers, nr_readers; 2486 struct ui_progress prog; 2487 u64 total_size = perf_data__size(session->data); 2488 struct reader *rd; 2489 2490 perf_tool__fill_defaults(tool); 2491 2492 ui_progress__init_size(&prog, total_size, "Sorting events..."); 2493 2494 nr_readers = 1; 2495 for (i = 0; i < data->dir.nr; i++) { 2496 if (data->dir.files[i].size) 2497 nr_readers++; 2498 } 2499 2500 rd = zalloc(nr_readers * sizeof(struct reader)); 2501 if (!rd) 2502 return -ENOMEM; 2503 2504 rd[0] = (struct reader) { 2505 .fd = perf_data__fd(session->data), 2506 .path = session->data->file.path, 2507 .data_size = session->header.data_size, 2508 .data_offset = session->header.data_offset, 2509 .process = process_simple, 2510 .in_place_update = session->data->in_place_update, 2511 }; 2512 ret = reader__init(&rd[0], NULL); 2513 if (ret) 2514 goto out_err; 2515 ret = reader__mmap(&rd[0], session); 2516 if (ret) 2517 goto out_err; 2518 readers = 1; 2519 2520 for (i = 0; i < data->dir.nr; i++) { 2521 if (!data->dir.files[i].size) 2522 continue; 2523 rd[readers] = (struct reader) { 2524 .fd = data->dir.files[i].fd, 2525 .path = data->dir.files[i].path, 2526 .data_size = data->dir.files[i].size, 2527 .data_offset = 0, 2528 .process = process_simple, 2529 .in_place_update = session->data->in_place_update, 2530 }; 2531 ret = reader__init(&rd[readers], NULL); 2532 if (ret) 2533 goto out_err; 2534 ret = reader__mmap(&rd[readers], session); 2535 if (ret) 2536 goto out_err; 2537 readers++; 2538 } 2539 2540 i = 0; 2541 while (readers) { 2542 if (session_done()) 2543 break; 2544 2545 if (rd[i].done) { 2546 i = (i + 1) % nr_readers; 2547 continue; 2548 } 2549 if (reader__eof(&rd[i])) { 2550 rd[i].done = true; 2551 readers--; 2552 continue; 2553 } 2554 2555 session->active_decomp = &rd[i].decomp_data; 2556 ret = reader__read_event(&rd[i], session, &prog); 2557 if (ret < 0) { 2558 goto out_err; 2559 } else if (ret == READER_NODATA) { 2560 ret = reader__mmap(&rd[i], session); 2561 if (ret) 2562 goto out_err; 2563 } 2564 2565 if (rd[i].size >= READER_MAX_SIZE) { 2566 rd[i].size = 0; 2567 i = (i + 1) % nr_readers; 2568 } 2569 } 2570 2571 ret = ordered_events__flush(&session->ordered_events, OE_FLUSH__FINAL); 2572 if (ret) 2573 goto out_err; 2574 2575 ret = perf_session__flush_thread_stacks(session); 2576 out_err: 2577 ui_progress__finish(); 2578 2579 if (!tool->no_warn) 2580 perf_session__warn_about_errors(session); 2581 2582 /* 2583 * We may switching perf.data output, make ordered_events 2584 * reusable. 2585 */ 2586 ordered_events__reinit(&session->ordered_events); 2587 2588 session->one_mmap = false; 2589 2590 session->active_decomp = &session->decomp_data; 2591 for (i = 0; i < nr_readers; i++) 2592 reader__release_decomp(&rd[i]); 2593 zfree(&rd); 2594 2595 return ret; 2596 } 2597 2598 int perf_session__process_events(struct perf_session *session) 2599 { 2600 if (perf_session__register_idle_thread(session) < 0) 2601 return -ENOMEM; 2602 2603 if (perf_data__is_pipe(session->data)) 2604 return __perf_session__process_pipe_events(session); 2605 2606 if (perf_data__is_dir(session->data) && session->data->dir.nr) 2607 return __perf_session__process_dir_events(session); 2608 2609 return __perf_session__process_events(session); 2610 } 2611 2612 bool perf_session__has_traces(struct perf_session *session, const char *msg) 2613 { 2614 struct evsel *evsel; 2615 2616 evlist__for_each_entry(session->evlist, evsel) { 2617 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) 2618 return true; 2619 } 2620 2621 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 2622 return false; 2623 } 2624 2625 int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr) 2626 { 2627 char *bracket; 2628 struct ref_reloc_sym *ref; 2629 struct kmap *kmap; 2630 2631 ref = zalloc(sizeof(struct ref_reloc_sym)); 2632 if (ref == NULL) 2633 return -ENOMEM; 2634 2635 ref->name = strdup(symbol_name); 2636 if (ref->name == NULL) { 2637 free(ref); 2638 return -ENOMEM; 2639 } 2640 2641 bracket = strchr(ref->name, ']'); 2642 if (bracket) 2643 *bracket = '\0'; 2644 2645 ref->addr = addr; 2646 2647 kmap = map__kmap(map); 2648 if (kmap) 2649 kmap->ref_reloc_sym = ref; 2650 2651 return 0; 2652 } 2653 2654 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp) 2655 { 2656 return machines__fprintf_dsos(&session->machines, fp); 2657 } 2658 2659 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp, 2660 bool (skip)(struct dso *dso, int parm), int parm) 2661 { 2662 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm); 2663 } 2664 2665 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp, 2666 bool skip_empty) 2667 { 2668 size_t ret; 2669 const char *msg = ""; 2670 2671 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE)) 2672 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)"; 2673 2674 ret = fprintf(fp, "\nAggregated stats:%s\n", msg); 2675 2676 ret += events_stats__fprintf(&session->evlist->stats, fp, skip_empty); 2677 return ret; 2678 } 2679 2680 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 2681 { 2682 /* 2683 * FIXME: Here we have to actually print all the machines in this 2684 * session, not just the host... 2685 */ 2686 return machine__fprintf(&session->machines.host, fp); 2687 } 2688 2689 struct evsel *perf_session__find_first_evtype(struct perf_session *session, 2690 unsigned int type) 2691 { 2692 struct evsel *pos; 2693 2694 evlist__for_each_entry(session->evlist, pos) { 2695 if (pos->core.attr.type == type) 2696 return pos; 2697 } 2698 return NULL; 2699 } 2700 2701 int perf_session__cpu_bitmap(struct perf_session *session, 2702 const char *cpu_list, unsigned long *cpu_bitmap) 2703 { 2704 int i, err = -1; 2705 struct perf_cpu_map *map; 2706 int nr_cpus = min(session->header.env.nr_cpus_avail, MAX_NR_CPUS); 2707 2708 for (i = 0; i < PERF_TYPE_MAX; ++i) { 2709 struct evsel *evsel; 2710 2711 evsel = perf_session__find_first_evtype(session, i); 2712 if (!evsel) 2713 continue; 2714 2715 if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CPU)) { 2716 pr_err("File does not contain CPU events. " 2717 "Remove -C option to proceed.\n"); 2718 return -1; 2719 } 2720 } 2721 2722 map = perf_cpu_map__new(cpu_list); 2723 if (map == NULL) { 2724 pr_err("Invalid cpu_list\n"); 2725 return -1; 2726 } 2727 2728 for (i = 0; i < perf_cpu_map__nr(map); i++) { 2729 struct perf_cpu cpu = perf_cpu_map__cpu(map, i); 2730 2731 if (cpu.cpu >= nr_cpus) { 2732 pr_err("Requested CPU %d too large. " 2733 "Consider raising MAX_NR_CPUS\n", cpu.cpu); 2734 goto out_delete_map; 2735 } 2736 2737 set_bit(cpu.cpu, cpu_bitmap); 2738 } 2739 2740 err = 0; 2741 2742 out_delete_map: 2743 perf_cpu_map__put(map); 2744 return err; 2745 } 2746 2747 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 2748 bool full) 2749 { 2750 if (session == NULL || fp == NULL) 2751 return; 2752 2753 fprintf(fp, "# ========\n"); 2754 perf_header__fprintf_info(session, fp, full); 2755 fprintf(fp, "# ========\n#\n"); 2756 } 2757 2758 int perf_event__process_id_index(struct perf_session *session, 2759 union perf_event *event) 2760 { 2761 struct evlist *evlist = session->evlist; 2762 struct perf_record_id_index *ie = &event->id_index; 2763 size_t i, nr, max_nr; 2764 2765 max_nr = (ie->header.size - sizeof(struct perf_record_id_index)) / 2766 sizeof(struct id_index_entry); 2767 nr = ie->nr; 2768 if (nr > max_nr) 2769 return -EINVAL; 2770 2771 if (dump_trace) 2772 fprintf(stdout, " nr: %zu\n", nr); 2773 2774 for (i = 0; i < nr; i++) { 2775 struct id_index_entry *e = &ie->entries[i]; 2776 struct perf_sample_id *sid; 2777 2778 if (dump_trace) { 2779 fprintf(stdout, " ... id: %"PRI_lu64, e->id); 2780 fprintf(stdout, " idx: %"PRI_lu64, e->idx); 2781 fprintf(stdout, " cpu: %"PRI_ld64, e->cpu); 2782 fprintf(stdout, " tid: %"PRI_ld64"\n", e->tid); 2783 } 2784 2785 sid = evlist__id2sid(evlist, e->id); 2786 if (!sid) 2787 return -ENOENT; 2788 sid->idx = e->idx; 2789 sid->cpu.cpu = e->cpu; 2790 sid->tid = e->tid; 2791 } 2792 return 0; 2793 } 2794