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