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 (!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 = 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 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 typedef void (*perf_event__swap_op)(union perf_event *event, 949 bool sample_id_all); 950 951 static perf_event__swap_op perf_event__swap_ops[] = { 952 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 953 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap, 954 [PERF_RECORD_COMM] = perf_event__comm_swap, 955 [PERF_RECORD_FORK] = perf_event__task_swap, 956 [PERF_RECORD_EXIT] = perf_event__task_swap, 957 [PERF_RECORD_LOST] = perf_event__all64_swap, 958 [PERF_RECORD_READ] = perf_event__read_swap, 959 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap, 960 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap, 961 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 962 [PERF_RECORD_AUX] = perf_event__aux_swap, 963 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap, 964 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap, 965 [PERF_RECORD_SWITCH] = perf_event__switch_swap, 966 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap, 967 [PERF_RECORD_NAMESPACES] = perf_event__namespaces_swap, 968 [PERF_RECORD_CGROUP] = perf_event__cgroup_swap, 969 [PERF_RECORD_TEXT_POKE] = perf_event__text_poke_swap, 970 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 971 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 972 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 973 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 974 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap, 975 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap, 976 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap, 977 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap, 978 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap, 979 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap, 980 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap, 981 [PERF_RECORD_STAT] = perf_event__stat_swap, 982 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap, 983 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap, 984 [PERF_RECORD_TIME_CONV] = perf_event__all64_swap, 985 [PERF_RECORD_HEADER_MAX] = NULL, 986 }; 987 988 /* 989 * When perf record finishes a pass on every buffers, it records this pseudo 990 * event. 991 * We record the max timestamp t found in the pass n. 992 * Assuming these timestamps are monotonic across cpus, we know that if 993 * a buffer still has events with timestamps below t, they will be all 994 * available and then read in the pass n + 1. 995 * Hence when we start to read the pass n + 2, we can safely flush every 996 * events with timestamps below t. 997 * 998 * ============ PASS n ================= 999 * CPU 0 | CPU 1 1000 * | 1001 * cnt1 timestamps | cnt2 timestamps 1002 * 1 | 2 1003 * 2 | 3 1004 * - | 4 <--- max recorded 1005 * 1006 * ============ PASS n + 1 ============== 1007 * CPU 0 | CPU 1 1008 * | 1009 * cnt1 timestamps | cnt2 timestamps 1010 * 3 | 5 1011 * 4 | 6 1012 * 5 | 7 <---- max recorded 1013 * 1014 * Flush every events below timestamp 4 1015 * 1016 * ============ PASS n + 2 ============== 1017 * CPU 0 | CPU 1 1018 * | 1019 * cnt1 timestamps | cnt2 timestamps 1020 * 6 | 8 1021 * 7 | 9 1022 * - | 10 1023 * 1024 * Flush every events below timestamp 7 1025 * etc... 1026 */ 1027 static int process_finished_round(struct perf_tool *tool __maybe_unused, 1028 union perf_event *event __maybe_unused, 1029 struct ordered_events *oe) 1030 { 1031 if (dump_trace) 1032 fprintf(stdout, "\n"); 1033 return ordered_events__flush(oe, OE_FLUSH__ROUND); 1034 } 1035 1036 int perf_session__queue_event(struct perf_session *s, union perf_event *event, 1037 u64 timestamp, u64 file_offset) 1038 { 1039 return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset); 1040 } 1041 1042 static void callchain__lbr_callstack_printf(struct perf_sample *sample) 1043 { 1044 struct ip_callchain *callchain = sample->callchain; 1045 struct branch_stack *lbr_stack = sample->branch_stack; 1046 struct branch_entry *entries = perf_sample__branch_entries(sample); 1047 u64 kernel_callchain_nr = callchain->nr; 1048 unsigned int i; 1049 1050 for (i = 0; i < kernel_callchain_nr; i++) { 1051 if (callchain->ips[i] == PERF_CONTEXT_USER) 1052 break; 1053 } 1054 1055 if ((i != kernel_callchain_nr) && lbr_stack->nr) { 1056 u64 total_nr; 1057 /* 1058 * LBR callstack can only get user call chain, 1059 * i is kernel call chain number, 1060 * 1 is PERF_CONTEXT_USER. 1061 * 1062 * The user call chain is stored in LBR registers. 1063 * LBR are pair registers. The caller is stored 1064 * in "from" register, while the callee is stored 1065 * in "to" register. 1066 * For example, there is a call stack 1067 * "A"->"B"->"C"->"D". 1068 * The LBR registers will recorde like 1069 * "C"->"D", "B"->"C", "A"->"B". 1070 * So only the first "to" register and all "from" 1071 * registers are needed to construct the whole stack. 1072 */ 1073 total_nr = i + 1 + lbr_stack->nr + 1; 1074 kernel_callchain_nr = i + 1; 1075 1076 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr); 1077 1078 for (i = 0; i < kernel_callchain_nr; i++) 1079 printf("..... %2d: %016" PRIx64 "\n", 1080 i, callchain->ips[i]); 1081 1082 printf("..... %2d: %016" PRIx64 "\n", 1083 (int)(kernel_callchain_nr), entries[0].to); 1084 for (i = 0; i < lbr_stack->nr; i++) 1085 printf("..... %2d: %016" PRIx64 "\n", 1086 (int)(i + kernel_callchain_nr + 1), entries[i].from); 1087 } 1088 } 1089 1090 static void callchain__printf(struct evsel *evsel, 1091 struct perf_sample *sample) 1092 { 1093 unsigned int i; 1094 struct ip_callchain *callchain = sample->callchain; 1095 1096 if (evsel__has_branch_callstack(evsel)) 1097 callchain__lbr_callstack_printf(sample); 1098 1099 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr); 1100 1101 for (i = 0; i < callchain->nr; i++) 1102 printf("..... %2d: %016" PRIx64 "\n", 1103 i, callchain->ips[i]); 1104 } 1105 1106 static void branch_stack__printf(struct perf_sample *sample, bool callstack) 1107 { 1108 struct branch_entry *entries = perf_sample__branch_entries(sample); 1109 uint64_t i; 1110 1111 printf("%s: nr:%" PRIu64 "\n", 1112 !callstack ? "... branch stack" : "... branch callstack", 1113 sample->branch_stack->nr); 1114 1115 for (i = 0; i < sample->branch_stack->nr; i++) { 1116 struct branch_entry *e = &entries[i]; 1117 1118 if (!callstack) { 1119 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n", 1120 i, e->from, e->to, 1121 (unsigned short)e->flags.cycles, 1122 e->flags.mispred ? "M" : " ", 1123 e->flags.predicted ? "P" : " ", 1124 e->flags.abort ? "A" : " ", 1125 e->flags.in_tx ? "T" : " ", 1126 (unsigned)e->flags.reserved); 1127 } else { 1128 printf("..... %2"PRIu64": %016" PRIx64 "\n", 1129 i, i > 0 ? e->from : e->to); 1130 } 1131 } 1132 } 1133 1134 static void regs_dump__printf(u64 mask, u64 *regs) 1135 { 1136 unsigned rid, i = 0; 1137 1138 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { 1139 u64 val = regs[i++]; 1140 1141 printf(".... %-5s 0x%016" PRIx64 "\n", 1142 perf_reg_name(rid), val); 1143 } 1144 } 1145 1146 static const char *regs_abi[] = { 1147 [PERF_SAMPLE_REGS_ABI_NONE] = "none", 1148 [PERF_SAMPLE_REGS_ABI_32] = "32-bit", 1149 [PERF_SAMPLE_REGS_ABI_64] = "64-bit", 1150 }; 1151 1152 static inline const char *regs_dump_abi(struct regs_dump *d) 1153 { 1154 if (d->abi > PERF_SAMPLE_REGS_ABI_64) 1155 return "unknown"; 1156 1157 return regs_abi[d->abi]; 1158 } 1159 1160 static void regs__printf(const char *type, struct regs_dump *regs) 1161 { 1162 u64 mask = regs->mask; 1163 1164 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n", 1165 type, 1166 mask, 1167 regs_dump_abi(regs)); 1168 1169 regs_dump__printf(mask, regs->regs); 1170 } 1171 1172 static void regs_user__printf(struct perf_sample *sample) 1173 { 1174 struct regs_dump *user_regs = &sample->user_regs; 1175 1176 if (user_regs->regs) 1177 regs__printf("user", user_regs); 1178 } 1179 1180 static void regs_intr__printf(struct perf_sample *sample) 1181 { 1182 struct regs_dump *intr_regs = &sample->intr_regs; 1183 1184 if (intr_regs->regs) 1185 regs__printf("intr", intr_regs); 1186 } 1187 1188 static void stack_user__printf(struct stack_dump *dump) 1189 { 1190 printf("... ustack: size %" PRIu64 ", offset 0x%x\n", 1191 dump->size, dump->offset); 1192 } 1193 1194 static void evlist__print_tstamp(struct evlist *evlist, union perf_event *event, struct perf_sample *sample) 1195 { 1196 u64 sample_type = __evlist__combined_sample_type(evlist); 1197 1198 if (event->header.type != PERF_RECORD_SAMPLE && 1199 !evlist__sample_id_all(evlist)) { 1200 fputs("-1 -1 ", stdout); 1201 return; 1202 } 1203 1204 if ((sample_type & PERF_SAMPLE_CPU)) 1205 printf("%u ", sample->cpu); 1206 1207 if (sample_type & PERF_SAMPLE_TIME) 1208 printf("%" PRIu64 " ", sample->time); 1209 } 1210 1211 static void sample_read__printf(struct perf_sample *sample, u64 read_format) 1212 { 1213 printf("... sample_read:\n"); 1214 1215 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1216 printf("...... time enabled %016" PRIx64 "\n", 1217 sample->read.time_enabled); 1218 1219 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1220 printf("...... time running %016" PRIx64 "\n", 1221 sample->read.time_running); 1222 1223 if (read_format & PERF_FORMAT_GROUP) { 1224 u64 i; 1225 1226 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr); 1227 1228 for (i = 0; i < sample->read.group.nr; i++) { 1229 struct sample_read_value *value; 1230 1231 value = &sample->read.group.values[i]; 1232 printf("..... id %016" PRIx64 1233 ", value %016" PRIx64 "\n", 1234 value->id, value->value); 1235 } 1236 } else 1237 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n", 1238 sample->read.one.id, sample->read.one.value); 1239 } 1240 1241 static void dump_event(struct evlist *evlist, union perf_event *event, 1242 u64 file_offset, struct perf_sample *sample) 1243 { 1244 if (!dump_trace) 1245 return; 1246 1247 printf("\n%#" PRIx64 " [%#x]: event: %d\n", 1248 file_offset, event->header.size, event->header.type); 1249 1250 trace_event(event); 1251 if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw) 1252 evlist->trace_event_sample_raw(evlist, event, sample); 1253 1254 if (sample) 1255 evlist__print_tstamp(evlist, event, sample); 1256 1257 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 1258 event->header.size, perf_event__name(event->header.type)); 1259 } 1260 1261 static void dump_sample(struct evsel *evsel, union perf_event *event, 1262 struct perf_sample *sample) 1263 { 1264 u64 sample_type; 1265 1266 if (!dump_trace) 1267 return; 1268 1269 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 1270 event->header.misc, sample->pid, sample->tid, sample->ip, 1271 sample->period, sample->addr); 1272 1273 sample_type = evsel->core.attr.sample_type; 1274 1275 if (evsel__has_callchain(evsel)) 1276 callchain__printf(evsel, sample); 1277 1278 if (evsel__has_br_stack(evsel)) 1279 branch_stack__printf(sample, evsel__has_branch_callstack(evsel)); 1280 1281 if (sample_type & PERF_SAMPLE_REGS_USER) 1282 regs_user__printf(sample); 1283 1284 if (sample_type & PERF_SAMPLE_REGS_INTR) 1285 regs_intr__printf(sample); 1286 1287 if (sample_type & PERF_SAMPLE_STACK_USER) 1288 stack_user__printf(&sample->user_stack); 1289 1290 if (sample_type & PERF_SAMPLE_WEIGHT) 1291 printf("... weight: %" PRIu64 "\n", sample->weight); 1292 1293 if (sample_type & PERF_SAMPLE_DATA_SRC) 1294 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src); 1295 1296 if (sample_type & PERF_SAMPLE_PHYS_ADDR) 1297 printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr); 1298 1299 if (sample_type & PERF_SAMPLE_TRANSACTION) 1300 printf("... transaction: %" PRIx64 "\n", sample->transaction); 1301 1302 if (sample_type & PERF_SAMPLE_READ) 1303 sample_read__printf(sample, evsel->core.attr.read_format); 1304 } 1305 1306 static void dump_read(struct evsel *evsel, union perf_event *event) 1307 { 1308 struct perf_record_read *read_event = &event->read; 1309 u64 read_format; 1310 1311 if (!dump_trace) 1312 return; 1313 1314 printf(": %d %d %s %" PRI_lu64 "\n", event->read.pid, event->read.tid, 1315 evsel__name(evsel), event->read.value); 1316 1317 if (!evsel) 1318 return; 1319 1320 read_format = evsel->core.attr.read_format; 1321 1322 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1323 printf("... time enabled : %" PRI_lu64 "\n", read_event->time_enabled); 1324 1325 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1326 printf("... time running : %" PRI_lu64 "\n", read_event->time_running); 1327 1328 if (read_format & PERF_FORMAT_ID) 1329 printf("... id : %" PRI_lu64 "\n", read_event->id); 1330 } 1331 1332 static struct machine *machines__find_for_cpumode(struct machines *machines, 1333 union perf_event *event, 1334 struct perf_sample *sample) 1335 { 1336 struct machine *machine; 1337 1338 if (perf_guest && 1339 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 1340 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) { 1341 u32 pid; 1342 1343 if (event->header.type == PERF_RECORD_MMAP 1344 || event->header.type == PERF_RECORD_MMAP2) 1345 pid = event->mmap.pid; 1346 else 1347 pid = sample->pid; 1348 1349 machine = machines__find(machines, pid); 1350 if (!machine) 1351 machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID); 1352 return machine; 1353 } 1354 1355 return &machines->host; 1356 } 1357 1358 static int deliver_sample_value(struct evlist *evlist, 1359 struct perf_tool *tool, 1360 union perf_event *event, 1361 struct perf_sample *sample, 1362 struct sample_read_value *v, 1363 struct machine *machine) 1364 { 1365 struct perf_sample_id *sid = evlist__id2sid(evlist, v->id); 1366 struct evsel *evsel; 1367 1368 if (sid) { 1369 sample->id = v->id; 1370 sample->period = v->value - sid->period; 1371 sid->period = v->value; 1372 } 1373 1374 if (!sid || sid->evsel == NULL) { 1375 ++evlist->stats.nr_unknown_id; 1376 return 0; 1377 } 1378 1379 /* 1380 * There's no reason to deliver sample 1381 * for zero period, bail out. 1382 */ 1383 if (!sample->period) 1384 return 0; 1385 1386 evsel = container_of(sid->evsel, struct evsel, core); 1387 return tool->sample(tool, event, sample, evsel, machine); 1388 } 1389 1390 static int deliver_sample_group(struct evlist *evlist, 1391 struct perf_tool *tool, 1392 union perf_event *event, 1393 struct perf_sample *sample, 1394 struct machine *machine) 1395 { 1396 int ret = -EINVAL; 1397 u64 i; 1398 1399 for (i = 0; i < sample->read.group.nr; i++) { 1400 ret = deliver_sample_value(evlist, tool, event, sample, 1401 &sample->read.group.values[i], 1402 machine); 1403 if (ret) 1404 break; 1405 } 1406 1407 return ret; 1408 } 1409 1410 static int evlist__deliver_sample(struct evlist *evlist, struct perf_tool *tool, 1411 union perf_event *event, struct perf_sample *sample, 1412 struct evsel *evsel, struct machine *machine) 1413 { 1414 /* We know evsel != NULL. */ 1415 u64 sample_type = evsel->core.attr.sample_type; 1416 u64 read_format = evsel->core.attr.read_format; 1417 1418 /* Standard sample delivery. */ 1419 if (!(sample_type & PERF_SAMPLE_READ)) 1420 return tool->sample(tool, event, sample, evsel, machine); 1421 1422 /* For PERF_SAMPLE_READ we have either single or group mode. */ 1423 if (read_format & PERF_FORMAT_GROUP) 1424 return deliver_sample_group(evlist, tool, event, sample, 1425 machine); 1426 else 1427 return deliver_sample_value(evlist, tool, event, sample, 1428 &sample->read.one, machine); 1429 } 1430 1431 static int machines__deliver_event(struct machines *machines, 1432 struct evlist *evlist, 1433 union perf_event *event, 1434 struct perf_sample *sample, 1435 struct perf_tool *tool, u64 file_offset) 1436 { 1437 struct evsel *evsel; 1438 struct machine *machine; 1439 1440 dump_event(evlist, event, file_offset, sample); 1441 1442 evsel = evlist__id2evsel(evlist, sample->id); 1443 1444 machine = machines__find_for_cpumode(machines, event, sample); 1445 1446 switch (event->header.type) { 1447 case PERF_RECORD_SAMPLE: 1448 if (evsel == NULL) { 1449 ++evlist->stats.nr_unknown_id; 1450 return 0; 1451 } 1452 dump_sample(evsel, event, sample); 1453 if (machine == NULL) { 1454 ++evlist->stats.nr_unprocessable_samples; 1455 return 0; 1456 } 1457 return evlist__deliver_sample(evlist, tool, event, sample, evsel, machine); 1458 case PERF_RECORD_MMAP: 1459 return tool->mmap(tool, event, sample, machine); 1460 case PERF_RECORD_MMAP2: 1461 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT) 1462 ++evlist->stats.nr_proc_map_timeout; 1463 return tool->mmap2(tool, event, sample, machine); 1464 case PERF_RECORD_COMM: 1465 return tool->comm(tool, event, sample, machine); 1466 case PERF_RECORD_NAMESPACES: 1467 return tool->namespaces(tool, event, sample, machine); 1468 case PERF_RECORD_CGROUP: 1469 return tool->cgroup(tool, event, sample, machine); 1470 case PERF_RECORD_FORK: 1471 return tool->fork(tool, event, sample, machine); 1472 case PERF_RECORD_EXIT: 1473 return tool->exit(tool, event, sample, machine); 1474 case PERF_RECORD_LOST: 1475 if (tool->lost == perf_event__process_lost) 1476 evlist->stats.total_lost += event->lost.lost; 1477 return tool->lost(tool, event, sample, machine); 1478 case PERF_RECORD_LOST_SAMPLES: 1479 if (tool->lost_samples == perf_event__process_lost_samples) 1480 evlist->stats.total_lost_samples += event->lost_samples.lost; 1481 return tool->lost_samples(tool, event, sample, machine); 1482 case PERF_RECORD_READ: 1483 dump_read(evsel, event); 1484 return tool->read(tool, event, sample, evsel, machine); 1485 case PERF_RECORD_THROTTLE: 1486 return tool->throttle(tool, event, sample, machine); 1487 case PERF_RECORD_UNTHROTTLE: 1488 return tool->unthrottle(tool, event, sample, machine); 1489 case PERF_RECORD_AUX: 1490 if (tool->aux == perf_event__process_aux) { 1491 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) 1492 evlist->stats.total_aux_lost += 1; 1493 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL) 1494 evlist->stats.total_aux_partial += 1; 1495 } 1496 return tool->aux(tool, event, sample, machine); 1497 case PERF_RECORD_ITRACE_START: 1498 return tool->itrace_start(tool, event, sample, machine); 1499 case PERF_RECORD_SWITCH: 1500 case PERF_RECORD_SWITCH_CPU_WIDE: 1501 return tool->context_switch(tool, event, sample, machine); 1502 case PERF_RECORD_KSYMBOL: 1503 return tool->ksymbol(tool, event, sample, machine); 1504 case PERF_RECORD_BPF_EVENT: 1505 return tool->bpf(tool, event, sample, machine); 1506 case PERF_RECORD_TEXT_POKE: 1507 return tool->text_poke(tool, event, sample, machine); 1508 default: 1509 ++evlist->stats.nr_unknown_events; 1510 return -1; 1511 } 1512 } 1513 1514 static int perf_session__deliver_event(struct perf_session *session, 1515 union perf_event *event, 1516 struct perf_tool *tool, 1517 u64 file_offset) 1518 { 1519 struct perf_sample sample; 1520 int ret = evlist__parse_sample(session->evlist, event, &sample); 1521 1522 if (ret) { 1523 pr_err("Can't parse sample, err = %d\n", ret); 1524 return ret; 1525 } 1526 1527 ret = auxtrace__process_event(session, event, &sample, tool); 1528 if (ret < 0) 1529 return ret; 1530 if (ret > 0) 1531 return 0; 1532 1533 ret = machines__deliver_event(&session->machines, session->evlist, 1534 event, &sample, tool, file_offset); 1535 1536 if (dump_trace && sample.aux_sample.size) 1537 auxtrace__dump_auxtrace_sample(session, &sample); 1538 1539 return ret; 1540 } 1541 1542 static s64 perf_session__process_user_event(struct perf_session *session, 1543 union perf_event *event, 1544 u64 file_offset) 1545 { 1546 struct ordered_events *oe = &session->ordered_events; 1547 struct perf_tool *tool = session->tool; 1548 struct perf_sample sample = { .time = 0, }; 1549 int fd = perf_data__fd(session->data); 1550 int err; 1551 1552 if (event->header.type != PERF_RECORD_COMPRESSED || 1553 tool->compressed == perf_session__process_compressed_event_stub) 1554 dump_event(session->evlist, event, file_offset, &sample); 1555 1556 /* These events are processed right away */ 1557 switch (event->header.type) { 1558 case PERF_RECORD_HEADER_ATTR: 1559 err = tool->attr(tool, event, &session->evlist); 1560 if (err == 0) { 1561 perf_session__set_id_hdr_size(session); 1562 perf_session__set_comm_exec(session); 1563 } 1564 return err; 1565 case PERF_RECORD_EVENT_UPDATE: 1566 return tool->event_update(tool, event, &session->evlist); 1567 case PERF_RECORD_HEADER_EVENT_TYPE: 1568 /* 1569 * Depreceated, but we need to handle it for sake 1570 * of old data files create in pipe mode. 1571 */ 1572 return 0; 1573 case PERF_RECORD_HEADER_TRACING_DATA: 1574 /* 1575 * Setup for reading amidst mmap, but only when we 1576 * are in 'file' mode. The 'pipe' fd is in proper 1577 * place already. 1578 */ 1579 if (!perf_data__is_pipe(session->data)) 1580 lseek(fd, file_offset, SEEK_SET); 1581 return tool->tracing_data(session, event); 1582 case PERF_RECORD_HEADER_BUILD_ID: 1583 return tool->build_id(session, event); 1584 case PERF_RECORD_FINISHED_ROUND: 1585 return tool->finished_round(tool, event, oe); 1586 case PERF_RECORD_ID_INDEX: 1587 return tool->id_index(session, event); 1588 case PERF_RECORD_AUXTRACE_INFO: 1589 return tool->auxtrace_info(session, event); 1590 case PERF_RECORD_AUXTRACE: 1591 /* setup for reading amidst mmap */ 1592 lseek(fd, file_offset + event->header.size, SEEK_SET); 1593 return tool->auxtrace(session, event); 1594 case PERF_RECORD_AUXTRACE_ERROR: 1595 perf_session__auxtrace_error_inc(session, event); 1596 return tool->auxtrace_error(session, event); 1597 case PERF_RECORD_THREAD_MAP: 1598 return tool->thread_map(session, event); 1599 case PERF_RECORD_CPU_MAP: 1600 return tool->cpu_map(session, event); 1601 case PERF_RECORD_STAT_CONFIG: 1602 return tool->stat_config(session, event); 1603 case PERF_RECORD_STAT: 1604 return tool->stat(session, event); 1605 case PERF_RECORD_STAT_ROUND: 1606 return tool->stat_round(session, event); 1607 case PERF_RECORD_TIME_CONV: 1608 session->time_conv = event->time_conv; 1609 return tool->time_conv(session, event); 1610 case PERF_RECORD_HEADER_FEATURE: 1611 return tool->feature(session, event); 1612 case PERF_RECORD_COMPRESSED: 1613 err = tool->compressed(session, event, file_offset); 1614 if (err) 1615 dump_event(session->evlist, event, file_offset, &sample); 1616 return err; 1617 default: 1618 return -EINVAL; 1619 } 1620 } 1621 1622 int perf_session__deliver_synth_event(struct perf_session *session, 1623 union perf_event *event, 1624 struct perf_sample *sample) 1625 { 1626 struct evlist *evlist = session->evlist; 1627 struct perf_tool *tool = session->tool; 1628 1629 events_stats__inc(&evlist->stats, event->header.type); 1630 1631 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1632 return perf_session__process_user_event(session, event, 0); 1633 1634 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0); 1635 } 1636 1637 static void event_swap(union perf_event *event, bool sample_id_all) 1638 { 1639 perf_event__swap_op swap; 1640 1641 swap = perf_event__swap_ops[event->header.type]; 1642 if (swap) 1643 swap(event, sample_id_all); 1644 } 1645 1646 int perf_session__peek_event(struct perf_session *session, off_t file_offset, 1647 void *buf, size_t buf_sz, 1648 union perf_event **event_ptr, 1649 struct perf_sample *sample) 1650 { 1651 union perf_event *event; 1652 size_t hdr_sz, rest; 1653 int fd; 1654 1655 if (session->one_mmap && !session->header.needs_swap) { 1656 event = file_offset - session->one_mmap_offset + 1657 session->one_mmap_addr; 1658 goto out_parse_sample; 1659 } 1660 1661 if (perf_data__is_pipe(session->data)) 1662 return -1; 1663 1664 fd = perf_data__fd(session->data); 1665 hdr_sz = sizeof(struct perf_event_header); 1666 1667 if (buf_sz < hdr_sz) 1668 return -1; 1669 1670 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 || 1671 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz) 1672 return -1; 1673 1674 event = (union perf_event *)buf; 1675 1676 if (session->header.needs_swap) 1677 perf_event_header__bswap(&event->header); 1678 1679 if (event->header.size < hdr_sz || event->header.size > buf_sz) 1680 return -1; 1681 1682 rest = event->header.size - hdr_sz; 1683 1684 if (readn(fd, buf, rest) != (ssize_t)rest) 1685 return -1; 1686 1687 if (session->header.needs_swap) 1688 event_swap(event, evlist__sample_id_all(session->evlist)); 1689 1690 out_parse_sample: 1691 1692 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START && 1693 evlist__parse_sample(session->evlist, event, sample)) 1694 return -1; 1695 1696 *event_ptr = event; 1697 1698 return 0; 1699 } 1700 1701 int perf_session__peek_events(struct perf_session *session, u64 offset, 1702 u64 size, peek_events_cb_t cb, void *data) 1703 { 1704 u64 max_offset = offset + size; 1705 char buf[PERF_SAMPLE_MAX_SIZE]; 1706 union perf_event *event; 1707 int err; 1708 1709 do { 1710 err = perf_session__peek_event(session, offset, buf, 1711 PERF_SAMPLE_MAX_SIZE, &event, 1712 NULL); 1713 if (err) 1714 return err; 1715 1716 err = cb(session, event, offset, data); 1717 if (err) 1718 return err; 1719 1720 offset += event->header.size; 1721 if (event->header.type == PERF_RECORD_AUXTRACE) 1722 offset += event->auxtrace.size; 1723 1724 } while (offset < max_offset); 1725 1726 return err; 1727 } 1728 1729 static s64 perf_session__process_event(struct perf_session *session, 1730 union perf_event *event, u64 file_offset) 1731 { 1732 struct evlist *evlist = session->evlist; 1733 struct perf_tool *tool = session->tool; 1734 int ret; 1735 1736 if (session->header.needs_swap) 1737 event_swap(event, evlist__sample_id_all(evlist)); 1738 1739 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1740 return -EINVAL; 1741 1742 events_stats__inc(&evlist->stats, event->header.type); 1743 1744 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1745 return perf_session__process_user_event(session, event, file_offset); 1746 1747 if (tool->ordered_events) { 1748 u64 timestamp = -1ULL; 1749 1750 ret = evlist__parse_sample_timestamp(evlist, event, ×tamp); 1751 if (ret && ret != -1) 1752 return ret; 1753 1754 ret = perf_session__queue_event(session, event, timestamp, file_offset); 1755 if (ret != -ETIME) 1756 return ret; 1757 } 1758 1759 return perf_session__deliver_event(session, event, tool, file_offset); 1760 } 1761 1762 void perf_event_header__bswap(struct perf_event_header *hdr) 1763 { 1764 hdr->type = bswap_32(hdr->type); 1765 hdr->misc = bswap_16(hdr->misc); 1766 hdr->size = bswap_16(hdr->size); 1767 } 1768 1769 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1770 { 1771 return machine__findnew_thread(&session->machines.host, -1, pid); 1772 } 1773 1774 /* 1775 * Threads are identified by pid and tid, and the idle task has pid == tid == 0. 1776 * So here a single thread is created for that, but actually there is a separate 1777 * idle task per cpu, so there should be one 'struct thread' per cpu, but there 1778 * is only 1. That causes problems for some tools, requiring workarounds. For 1779 * example get_idle_thread() in builtin-sched.c, or thread_stack__per_cpu(). 1780 */ 1781 int perf_session__register_idle_thread(struct perf_session *session) 1782 { 1783 struct thread *thread; 1784 int err = 0; 1785 1786 thread = machine__findnew_thread(&session->machines.host, 0, 0); 1787 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) { 1788 pr_err("problem inserting idle task.\n"); 1789 err = -1; 1790 } 1791 1792 if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) { 1793 pr_err("problem inserting idle task.\n"); 1794 err = -1; 1795 } 1796 1797 /* machine__findnew_thread() got the thread, so put it */ 1798 thread__put(thread); 1799 return err; 1800 } 1801 1802 static void 1803 perf_session__warn_order(const struct perf_session *session) 1804 { 1805 const struct ordered_events *oe = &session->ordered_events; 1806 struct evsel *evsel; 1807 bool should_warn = true; 1808 1809 evlist__for_each_entry(session->evlist, evsel) { 1810 if (evsel->core.attr.write_backward) 1811 should_warn = false; 1812 } 1813 1814 if (!should_warn) 1815 return; 1816 if (oe->nr_unordered_events != 0) 1817 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events); 1818 } 1819 1820 static void perf_session__warn_about_errors(const struct perf_session *session) 1821 { 1822 const struct events_stats *stats = &session->evlist->stats; 1823 1824 if (session->tool->lost == perf_event__process_lost && 1825 stats->nr_events[PERF_RECORD_LOST] != 0) { 1826 ui__warning("Processed %d events and lost %d chunks!\n\n" 1827 "Check IO/CPU overload!\n\n", 1828 stats->nr_events[0], 1829 stats->nr_events[PERF_RECORD_LOST]); 1830 } 1831 1832 if (session->tool->lost_samples == perf_event__process_lost_samples) { 1833 double drop_rate; 1834 1835 drop_rate = (double)stats->total_lost_samples / 1836 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples); 1837 if (drop_rate > 0.05) { 1838 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n", 1839 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples, 1840 drop_rate * 100.0); 1841 } 1842 } 1843 1844 if (session->tool->aux == perf_event__process_aux && 1845 stats->total_aux_lost != 0) { 1846 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n", 1847 stats->total_aux_lost, 1848 stats->nr_events[PERF_RECORD_AUX]); 1849 } 1850 1851 if (session->tool->aux == perf_event__process_aux && 1852 stats->total_aux_partial != 0) { 1853 bool vmm_exclusive = false; 1854 1855 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive", 1856 &vmm_exclusive); 1857 1858 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n" 1859 "Are you running a KVM guest in the background?%s\n\n", 1860 stats->total_aux_partial, 1861 stats->nr_events[PERF_RECORD_AUX], 1862 vmm_exclusive ? 1863 "\nReloading kvm_intel module with vmm_exclusive=0\n" 1864 "will reduce the gaps to only guest's timeslices." : 1865 ""); 1866 } 1867 1868 if (stats->nr_unknown_events != 0) { 1869 ui__warning("Found %u unknown events!\n\n" 1870 "Is this an older tool processing a perf.data " 1871 "file generated by a more recent tool?\n\n" 1872 "If that is not the case, consider " 1873 "reporting to linux-kernel@vger.kernel.org.\n\n", 1874 stats->nr_unknown_events); 1875 } 1876 1877 if (stats->nr_unknown_id != 0) { 1878 ui__warning("%u samples with id not present in the header\n", 1879 stats->nr_unknown_id); 1880 } 1881 1882 if (stats->nr_invalid_chains != 0) { 1883 ui__warning("Found invalid callchains!\n\n" 1884 "%u out of %u events were discarded for this reason.\n\n" 1885 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1886 stats->nr_invalid_chains, 1887 stats->nr_events[PERF_RECORD_SAMPLE]); 1888 } 1889 1890 if (stats->nr_unprocessable_samples != 0) { 1891 ui__warning("%u unprocessable samples recorded.\n" 1892 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1893 stats->nr_unprocessable_samples); 1894 } 1895 1896 perf_session__warn_order(session); 1897 1898 events_stats__auxtrace_error_warn(stats); 1899 1900 if (stats->nr_proc_map_timeout != 0) { 1901 ui__warning("%d map information files for pre-existing threads were\n" 1902 "not processed, if there are samples for addresses they\n" 1903 "will not be resolved, you may find out which are these\n" 1904 "threads by running with -v and redirecting the output\n" 1905 "to a file.\n" 1906 "The time limit to process proc map is too short?\n" 1907 "Increase it by --proc-map-timeout\n", 1908 stats->nr_proc_map_timeout); 1909 } 1910 } 1911 1912 static int perf_session__flush_thread_stack(struct thread *thread, 1913 void *p __maybe_unused) 1914 { 1915 return thread_stack__flush(thread); 1916 } 1917 1918 static int perf_session__flush_thread_stacks(struct perf_session *session) 1919 { 1920 return machines__for_each_thread(&session->machines, 1921 perf_session__flush_thread_stack, 1922 NULL); 1923 } 1924 1925 volatile int session_done; 1926 1927 static int __perf_session__process_decomp_events(struct perf_session *session); 1928 1929 static int __perf_session__process_pipe_events(struct perf_session *session) 1930 { 1931 struct ordered_events *oe = &session->ordered_events; 1932 struct perf_tool *tool = session->tool; 1933 union perf_event *event; 1934 uint32_t size, cur_size = 0; 1935 void *buf = NULL; 1936 s64 skip = 0; 1937 u64 head; 1938 ssize_t err; 1939 void *p; 1940 1941 perf_tool__fill_defaults(tool); 1942 1943 head = 0; 1944 cur_size = sizeof(union perf_event); 1945 1946 buf = malloc(cur_size); 1947 if (!buf) 1948 return -errno; 1949 ordered_events__set_copy_on_queue(oe, true); 1950 more: 1951 event = buf; 1952 err = perf_data__read(session->data, event, 1953 sizeof(struct perf_event_header)); 1954 if (err <= 0) { 1955 if (err == 0) 1956 goto done; 1957 1958 pr_err("failed to read event header\n"); 1959 goto out_err; 1960 } 1961 1962 if (session->header.needs_swap) 1963 perf_event_header__bswap(&event->header); 1964 1965 size = event->header.size; 1966 if (size < sizeof(struct perf_event_header)) { 1967 pr_err("bad event header size\n"); 1968 goto out_err; 1969 } 1970 1971 if (size > cur_size) { 1972 void *new = realloc(buf, size); 1973 if (!new) { 1974 pr_err("failed to allocate memory to read event\n"); 1975 goto out_err; 1976 } 1977 buf = new; 1978 cur_size = size; 1979 event = buf; 1980 } 1981 p = event; 1982 p += sizeof(struct perf_event_header); 1983 1984 if (size - sizeof(struct perf_event_header)) { 1985 err = perf_data__read(session->data, p, 1986 size - sizeof(struct perf_event_header)); 1987 if (err <= 0) { 1988 if (err == 0) { 1989 pr_err("unexpected end of event stream\n"); 1990 goto done; 1991 } 1992 1993 pr_err("failed to read event data\n"); 1994 goto out_err; 1995 } 1996 } 1997 1998 if ((skip = perf_session__process_event(session, event, head)) < 0) { 1999 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 2000 head, event->header.size, event->header.type); 2001 err = -EINVAL; 2002 goto out_err; 2003 } 2004 2005 head += size; 2006 2007 if (skip > 0) 2008 head += skip; 2009 2010 err = __perf_session__process_decomp_events(session); 2011 if (err) 2012 goto out_err; 2013 2014 if (!session_done()) 2015 goto more; 2016 done: 2017 /* do the final flush for ordered samples */ 2018 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 2019 if (err) 2020 goto out_err; 2021 err = auxtrace__flush_events(session, tool); 2022 if (err) 2023 goto out_err; 2024 err = perf_session__flush_thread_stacks(session); 2025 out_err: 2026 free(buf); 2027 if (!tool->no_warn) 2028 perf_session__warn_about_errors(session); 2029 ordered_events__free(&session->ordered_events); 2030 auxtrace__free_events(session); 2031 return err; 2032 } 2033 2034 static union perf_event * 2035 prefetch_event(char *buf, u64 head, size_t mmap_size, 2036 bool needs_swap, union perf_event *error) 2037 { 2038 union perf_event *event; 2039 2040 /* 2041 * Ensure we have enough space remaining to read 2042 * the size of the event in the headers. 2043 */ 2044 if (head + sizeof(event->header) > mmap_size) 2045 return NULL; 2046 2047 event = (union perf_event *)(buf + head); 2048 if (needs_swap) 2049 perf_event_header__bswap(&event->header); 2050 2051 if (head + event->header.size <= mmap_size) 2052 return event; 2053 2054 /* We're not fetching the event so swap back again */ 2055 if (needs_swap) 2056 perf_event_header__bswap(&event->header); 2057 2058 pr_debug("%s: head=%#" PRIx64 " event->header_size=%#x, mmap_size=%#zx:" 2059 " fuzzed or compressed perf.data?\n",__func__, head, event->header.size, mmap_size); 2060 2061 return error; 2062 } 2063 2064 static union perf_event * 2065 fetch_mmaped_event(u64 head, size_t mmap_size, char *buf, bool needs_swap) 2066 { 2067 return prefetch_event(buf, head, mmap_size, needs_swap, ERR_PTR(-EINVAL)); 2068 } 2069 2070 static union perf_event * 2071 fetch_decomp_event(u64 head, size_t mmap_size, char *buf, bool needs_swap) 2072 { 2073 return prefetch_event(buf, head, mmap_size, needs_swap, NULL); 2074 } 2075 2076 static int __perf_session__process_decomp_events(struct perf_session *session) 2077 { 2078 s64 skip; 2079 u64 size, file_pos = 0; 2080 struct decomp *decomp = session->decomp_last; 2081 2082 if (!decomp) 2083 return 0; 2084 2085 while (decomp->head < decomp->size && !session_done()) { 2086 union perf_event *event = fetch_decomp_event(decomp->head, decomp->size, decomp->data, 2087 session->header.needs_swap); 2088 2089 if (!event) 2090 break; 2091 2092 size = event->header.size; 2093 2094 if (size < sizeof(struct perf_event_header) || 2095 (skip = perf_session__process_event(session, event, file_pos)) < 0) { 2096 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 2097 decomp->file_pos + decomp->head, event->header.size, event->header.type); 2098 return -EINVAL; 2099 } 2100 2101 if (skip) 2102 size += skip; 2103 2104 decomp->head += size; 2105 } 2106 2107 return 0; 2108 } 2109 2110 /* 2111 * On 64bit we can mmap the data file in one go. No need for tiny mmap 2112 * slices. On 32bit we use 32MB. 2113 */ 2114 #if BITS_PER_LONG == 64 2115 #define MMAP_SIZE ULLONG_MAX 2116 #define NUM_MMAPS 1 2117 #else 2118 #define MMAP_SIZE (32 * 1024 * 1024ULL) 2119 #define NUM_MMAPS 128 2120 #endif 2121 2122 struct reader; 2123 2124 typedef s64 (*reader_cb_t)(struct perf_session *session, 2125 union perf_event *event, 2126 u64 file_offset); 2127 2128 struct reader { 2129 int fd; 2130 u64 data_size; 2131 u64 data_offset; 2132 reader_cb_t process; 2133 }; 2134 2135 static int 2136 reader__process_events(struct reader *rd, struct perf_session *session, 2137 struct ui_progress *prog) 2138 { 2139 u64 data_size = rd->data_size; 2140 u64 head, page_offset, file_offset, file_pos, size; 2141 int err = 0, mmap_prot, mmap_flags, map_idx = 0; 2142 size_t mmap_size; 2143 char *buf, *mmaps[NUM_MMAPS]; 2144 union perf_event *event; 2145 s64 skip; 2146 2147 page_offset = page_size * (rd->data_offset / page_size); 2148 file_offset = page_offset; 2149 head = rd->data_offset - page_offset; 2150 2151 ui_progress__init_size(prog, data_size, "Processing events..."); 2152 2153 data_size += rd->data_offset; 2154 2155 mmap_size = MMAP_SIZE; 2156 if (mmap_size > data_size) { 2157 mmap_size = data_size; 2158 session->one_mmap = true; 2159 } 2160 2161 memset(mmaps, 0, sizeof(mmaps)); 2162 2163 mmap_prot = PROT_READ; 2164 mmap_flags = MAP_SHARED; 2165 2166 if (session->header.needs_swap) { 2167 mmap_prot |= PROT_WRITE; 2168 mmap_flags = MAP_PRIVATE; 2169 } 2170 remap: 2171 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, rd->fd, 2172 file_offset); 2173 if (buf == MAP_FAILED) { 2174 pr_err("failed to mmap file\n"); 2175 err = -errno; 2176 goto out; 2177 } 2178 mmaps[map_idx] = buf; 2179 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 2180 file_pos = file_offset + head; 2181 if (session->one_mmap) { 2182 session->one_mmap_addr = buf; 2183 session->one_mmap_offset = file_offset; 2184 } 2185 2186 more: 2187 event = fetch_mmaped_event(head, mmap_size, buf, session->header.needs_swap); 2188 if (IS_ERR(event)) 2189 return PTR_ERR(event); 2190 2191 if (!event) { 2192 if (mmaps[map_idx]) { 2193 munmap(mmaps[map_idx], mmap_size); 2194 mmaps[map_idx] = NULL; 2195 } 2196 2197 page_offset = page_size * (head / page_size); 2198 file_offset += page_offset; 2199 head -= page_offset; 2200 goto remap; 2201 } 2202 2203 size = event->header.size; 2204 2205 skip = -EINVAL; 2206 2207 if (size < sizeof(struct perf_event_header) || 2208 (skip = rd->process(session, event, file_pos)) < 0) { 2209 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n", 2210 file_offset + head, event->header.size, 2211 event->header.type, strerror(-skip)); 2212 err = skip; 2213 goto out; 2214 } 2215 2216 if (skip) 2217 size += skip; 2218 2219 head += size; 2220 file_pos += size; 2221 2222 err = __perf_session__process_decomp_events(session); 2223 if (err) 2224 goto out; 2225 2226 ui_progress__update(prog, size); 2227 2228 if (session_done()) 2229 goto out; 2230 2231 if (file_pos < data_size) 2232 goto more; 2233 2234 out: 2235 return err; 2236 } 2237 2238 static s64 process_simple(struct perf_session *session, 2239 union perf_event *event, 2240 u64 file_offset) 2241 { 2242 return perf_session__process_event(session, event, file_offset); 2243 } 2244 2245 static int __perf_session__process_events(struct perf_session *session) 2246 { 2247 struct reader rd = { 2248 .fd = perf_data__fd(session->data), 2249 .data_size = session->header.data_size, 2250 .data_offset = session->header.data_offset, 2251 .process = process_simple, 2252 }; 2253 struct ordered_events *oe = &session->ordered_events; 2254 struct perf_tool *tool = session->tool; 2255 struct ui_progress prog; 2256 int err; 2257 2258 perf_tool__fill_defaults(tool); 2259 2260 if (rd.data_size == 0) 2261 return -1; 2262 2263 ui_progress__init_size(&prog, rd.data_size, "Processing events..."); 2264 2265 err = reader__process_events(&rd, session, &prog); 2266 if (err) 2267 goto out_err; 2268 /* do the final flush for ordered samples */ 2269 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 2270 if (err) 2271 goto out_err; 2272 err = auxtrace__flush_events(session, tool); 2273 if (err) 2274 goto out_err; 2275 err = perf_session__flush_thread_stacks(session); 2276 out_err: 2277 ui_progress__finish(); 2278 if (!tool->no_warn) 2279 perf_session__warn_about_errors(session); 2280 /* 2281 * We may switching perf.data output, make ordered_events 2282 * reusable. 2283 */ 2284 ordered_events__reinit(&session->ordered_events); 2285 auxtrace__free_events(session); 2286 session->one_mmap = false; 2287 return err; 2288 } 2289 2290 int perf_session__process_events(struct perf_session *session) 2291 { 2292 if (perf_session__register_idle_thread(session) < 0) 2293 return -ENOMEM; 2294 2295 if (perf_data__is_pipe(session->data)) 2296 return __perf_session__process_pipe_events(session); 2297 2298 return __perf_session__process_events(session); 2299 } 2300 2301 bool perf_session__has_traces(struct perf_session *session, const char *msg) 2302 { 2303 struct evsel *evsel; 2304 2305 evlist__for_each_entry(session->evlist, evsel) { 2306 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) 2307 return true; 2308 } 2309 2310 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 2311 return false; 2312 } 2313 2314 int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr) 2315 { 2316 char *bracket; 2317 struct ref_reloc_sym *ref; 2318 struct kmap *kmap; 2319 2320 ref = zalloc(sizeof(struct ref_reloc_sym)); 2321 if (ref == NULL) 2322 return -ENOMEM; 2323 2324 ref->name = strdup(symbol_name); 2325 if (ref->name == NULL) { 2326 free(ref); 2327 return -ENOMEM; 2328 } 2329 2330 bracket = strchr(ref->name, ']'); 2331 if (bracket) 2332 *bracket = '\0'; 2333 2334 ref->addr = addr; 2335 2336 kmap = map__kmap(map); 2337 if (kmap) 2338 kmap->ref_reloc_sym = ref; 2339 2340 return 0; 2341 } 2342 2343 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp) 2344 { 2345 return machines__fprintf_dsos(&session->machines, fp); 2346 } 2347 2348 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp, 2349 bool (skip)(struct dso *dso, int parm), int parm) 2350 { 2351 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm); 2352 } 2353 2354 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 2355 { 2356 size_t ret; 2357 const char *msg = ""; 2358 2359 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE)) 2360 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)"; 2361 2362 ret = fprintf(fp, "\nAggregated stats:%s\n", msg); 2363 2364 ret += events_stats__fprintf(&session->evlist->stats, fp); 2365 return ret; 2366 } 2367 2368 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 2369 { 2370 /* 2371 * FIXME: Here we have to actually print all the machines in this 2372 * session, not just the host... 2373 */ 2374 return machine__fprintf(&session->machines.host, fp); 2375 } 2376 2377 struct evsel *perf_session__find_first_evtype(struct perf_session *session, 2378 unsigned int type) 2379 { 2380 struct evsel *pos; 2381 2382 evlist__for_each_entry(session->evlist, pos) { 2383 if (pos->core.attr.type == type) 2384 return pos; 2385 } 2386 return NULL; 2387 } 2388 2389 int perf_session__cpu_bitmap(struct perf_session *session, 2390 const char *cpu_list, unsigned long *cpu_bitmap) 2391 { 2392 int i, err = -1; 2393 struct perf_cpu_map *map; 2394 int nr_cpus = min(session->header.env.nr_cpus_online, MAX_NR_CPUS); 2395 2396 for (i = 0; i < PERF_TYPE_MAX; ++i) { 2397 struct evsel *evsel; 2398 2399 evsel = perf_session__find_first_evtype(session, i); 2400 if (!evsel) 2401 continue; 2402 2403 if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CPU)) { 2404 pr_err("File does not contain CPU events. " 2405 "Remove -C option to proceed.\n"); 2406 return -1; 2407 } 2408 } 2409 2410 map = perf_cpu_map__new(cpu_list); 2411 if (map == NULL) { 2412 pr_err("Invalid cpu_list\n"); 2413 return -1; 2414 } 2415 2416 for (i = 0; i < map->nr; i++) { 2417 int cpu = map->map[i]; 2418 2419 if (cpu >= nr_cpus) { 2420 pr_err("Requested CPU %d too large. " 2421 "Consider raising MAX_NR_CPUS\n", cpu); 2422 goto out_delete_map; 2423 } 2424 2425 set_bit(cpu, cpu_bitmap); 2426 } 2427 2428 err = 0; 2429 2430 out_delete_map: 2431 perf_cpu_map__put(map); 2432 return err; 2433 } 2434 2435 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 2436 bool full) 2437 { 2438 if (session == NULL || fp == NULL) 2439 return; 2440 2441 fprintf(fp, "# ========\n"); 2442 perf_header__fprintf_info(session, fp, full); 2443 fprintf(fp, "# ========\n#\n"); 2444 } 2445 2446 int perf_event__process_id_index(struct perf_session *session, 2447 union perf_event *event) 2448 { 2449 struct evlist *evlist = session->evlist; 2450 struct perf_record_id_index *ie = &event->id_index; 2451 size_t i, nr, max_nr; 2452 2453 max_nr = (ie->header.size - sizeof(struct perf_record_id_index)) / 2454 sizeof(struct id_index_entry); 2455 nr = ie->nr; 2456 if (nr > max_nr) 2457 return -EINVAL; 2458 2459 if (dump_trace) 2460 fprintf(stdout, " nr: %zu\n", nr); 2461 2462 for (i = 0; i < nr; i++) { 2463 struct id_index_entry *e = &ie->entries[i]; 2464 struct perf_sample_id *sid; 2465 2466 if (dump_trace) { 2467 fprintf(stdout, " ... id: %"PRI_lu64, e->id); 2468 fprintf(stdout, " idx: %"PRI_lu64, e->idx); 2469 fprintf(stdout, " cpu: %"PRI_ld64, e->cpu); 2470 fprintf(stdout, " tid: %"PRI_ld64"\n", e->tid); 2471 } 2472 2473 sid = evlist__id2sid(evlist, e->id); 2474 if (!sid) 2475 return -ENOENT; 2476 sid->idx = e->idx; 2477 sid->cpu = e->cpu; 2478 sid->tid = e->tid; 2479 } 2480 return 0; 2481 } 2482