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