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