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 <traceevent/event-parse.h> 8 #include <api/fs/fs.h> 9 10 #include <byteswap.h> 11 #include <unistd.h> 12 #include <sys/types.h> 13 #include <sys/mman.h> 14 #include <perf/cpumap.h> 15 16 #include "evlist.h" 17 #include "evsel.h" 18 #include "memswap.h" 19 #include "map.h" 20 #include "symbol.h" 21 #include "session.h" 22 #include "tool.h" 23 #include "sort.h" 24 #include "cpumap.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 "arch/common.h" 33 34 #ifdef HAVE_ZSTD_SUPPORT 35 static int perf_session__process_compressed_event(struct perf_session *session, 36 union perf_event *event, u64 file_offset) 37 { 38 void *src; 39 size_t decomp_size, src_size; 40 u64 decomp_last_rem = 0; 41 size_t mmap_len, decomp_len = session->header.env.comp_mmap_len; 42 struct decomp *decomp, *decomp_last = session->decomp_last; 43 44 if (decomp_last) { 45 decomp_last_rem = decomp_last->size - decomp_last->head; 46 decomp_len += decomp_last_rem; 47 } 48 49 mmap_len = sizeof(struct decomp) + decomp_len; 50 decomp = mmap(NULL, mmap_len, PROT_READ|PROT_WRITE, 51 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); 52 if (decomp == MAP_FAILED) { 53 pr_err("Couldn't allocate memory for decompression\n"); 54 return -1; 55 } 56 57 decomp->file_pos = file_offset; 58 decomp->mmap_len = mmap_len; 59 decomp->head = 0; 60 61 if (decomp_last_rem) { 62 memcpy(decomp->data, &(decomp_last->data[decomp_last->head]), decomp_last_rem); 63 decomp->size = decomp_last_rem; 64 } 65 66 src = (void *)event + sizeof(struct compressed_event); 67 src_size = event->pack.header.size - sizeof(struct compressed_event); 68 69 decomp_size = zstd_decompress_stream(&(session->zstd_data), src, src_size, 70 &(decomp->data[decomp_last_rem]), decomp_len - decomp_last_rem); 71 if (!decomp_size) { 72 munmap(decomp, mmap_len); 73 pr_err("Couldn't decompress data\n"); 74 return -1; 75 } 76 77 decomp->size += decomp_size; 78 79 if (session->decomp == NULL) { 80 session->decomp = decomp; 81 session->decomp_last = decomp; 82 } else { 83 session->decomp_last->next = decomp; 84 session->decomp_last = decomp; 85 } 86 87 pr_debug("decomp (B): %ld to %ld\n", src_size, decomp_size); 88 89 return 0; 90 } 91 #else /* !HAVE_ZSTD_SUPPORT */ 92 #define perf_session__process_compressed_event perf_session__process_compressed_event_stub 93 #endif 94 95 static int perf_session__deliver_event(struct perf_session *session, 96 union perf_event *event, 97 struct perf_tool *tool, 98 u64 file_offset); 99 100 static int perf_session__open(struct perf_session *session) 101 { 102 struct perf_data *data = session->data; 103 104 if (perf_session__read_header(session) < 0) { 105 pr_err("incompatible file format (rerun with -v to learn more)\n"); 106 return -1; 107 } 108 109 if (perf_data__is_pipe(data)) 110 return 0; 111 112 if (perf_header__has_feat(&session->header, HEADER_STAT)) 113 return 0; 114 115 if (!perf_evlist__valid_sample_type(session->evlist)) { 116 pr_err("non matching sample_type\n"); 117 return -1; 118 } 119 120 if (!perf_evlist__valid_sample_id_all(session->evlist)) { 121 pr_err("non matching sample_id_all\n"); 122 return -1; 123 } 124 125 if (!perf_evlist__valid_read_format(session->evlist)) { 126 pr_err("non matching read_format\n"); 127 return -1; 128 } 129 130 return 0; 131 } 132 133 void perf_session__set_id_hdr_size(struct perf_session *session) 134 { 135 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist); 136 137 machines__set_id_hdr_size(&session->machines, id_hdr_size); 138 } 139 140 int perf_session__create_kernel_maps(struct perf_session *session) 141 { 142 int ret = machine__create_kernel_maps(&session->machines.host); 143 144 if (ret >= 0) 145 ret = machines__create_guest_kernel_maps(&session->machines); 146 return ret; 147 } 148 149 static void perf_session__destroy_kernel_maps(struct perf_session *session) 150 { 151 machines__destroy_kernel_maps(&session->machines); 152 } 153 154 static bool perf_session__has_comm_exec(struct perf_session *session) 155 { 156 struct evsel *evsel; 157 158 evlist__for_each_entry(session->evlist, evsel) { 159 if (evsel->core.attr.comm_exec) 160 return true; 161 } 162 163 return false; 164 } 165 166 static void perf_session__set_comm_exec(struct perf_session *session) 167 { 168 bool comm_exec = perf_session__has_comm_exec(session); 169 170 machines__set_comm_exec(&session->machines, comm_exec); 171 } 172 173 static int ordered_events__deliver_event(struct ordered_events *oe, 174 struct ordered_event *event) 175 { 176 struct perf_session *session = container_of(oe, struct perf_session, 177 ordered_events); 178 179 return perf_session__deliver_event(session, event->event, 180 session->tool, event->file_offset); 181 } 182 183 struct perf_session *perf_session__new(struct perf_data *data, 184 bool repipe, struct perf_tool *tool) 185 { 186 struct perf_session *session = zalloc(sizeof(*session)); 187 188 if (!session) 189 goto out; 190 191 session->repipe = repipe; 192 session->tool = tool; 193 INIT_LIST_HEAD(&session->auxtrace_index); 194 machines__init(&session->machines); 195 ordered_events__init(&session->ordered_events, 196 ordered_events__deliver_event, NULL); 197 198 perf_env__init(&session->header.env); 199 if (data) { 200 if (perf_data__open(data)) 201 goto out_delete; 202 203 session->data = data; 204 205 if (perf_data__is_read(data)) { 206 if (perf_session__open(session) < 0) 207 goto out_delete; 208 209 /* 210 * set session attributes that are present in perf.data 211 * but not in pipe-mode. 212 */ 213 if (!data->is_pipe) { 214 perf_session__set_id_hdr_size(session); 215 perf_session__set_comm_exec(session); 216 } 217 218 perf_evlist__init_trace_event_sample_raw(session->evlist); 219 220 /* Open the directory data. */ 221 if (data->is_dir && perf_data__open_dir(data)) 222 goto out_delete; 223 } 224 } else { 225 session->machines.host.env = &perf_env; 226 } 227 228 session->machines.host.single_address_space = 229 perf_env__single_address_space(session->machines.host.env); 230 231 if (!data || perf_data__is_write(data)) { 232 /* 233 * In O_RDONLY mode this will be performed when reading the 234 * kernel MMAP event, in perf_event__process_mmap(). 235 */ 236 if (perf_session__create_kernel_maps(session) < 0) 237 pr_warning("Cannot read kernel map\n"); 238 } 239 240 /* 241 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is 242 * processed, so perf_evlist__sample_id_all is not meaningful here. 243 */ 244 if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps && 245 tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) { 246 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); 247 tool->ordered_events = false; 248 } 249 250 return session; 251 252 out_delete: 253 perf_session__delete(session); 254 out: 255 return NULL; 256 } 257 258 static void perf_session__delete_threads(struct perf_session *session) 259 { 260 machine__delete_threads(&session->machines.host); 261 } 262 263 static void perf_session__release_decomp_events(struct perf_session *session) 264 { 265 struct decomp *next, *decomp; 266 size_t mmap_len; 267 next = session->decomp; 268 do { 269 decomp = next; 270 if (decomp == NULL) 271 break; 272 next = decomp->next; 273 mmap_len = decomp->mmap_len; 274 munmap(decomp, mmap_len); 275 } while (1); 276 } 277 278 void perf_session__delete(struct perf_session *session) 279 { 280 if (session == NULL) 281 return; 282 auxtrace__free(session); 283 auxtrace_index__free(&session->auxtrace_index); 284 perf_session__destroy_kernel_maps(session); 285 perf_session__delete_threads(session); 286 perf_session__release_decomp_events(session); 287 perf_env__exit(&session->header.env); 288 machines__exit(&session->machines); 289 if (session->data) 290 perf_data__close(session->data); 291 free(session); 292 } 293 294 static int process_event_synth_tracing_data_stub(struct perf_session *session 295 __maybe_unused, 296 union perf_event *event 297 __maybe_unused) 298 { 299 dump_printf(": unhandled!\n"); 300 return 0; 301 } 302 303 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused, 304 union perf_event *event __maybe_unused, 305 struct evlist **pevlist 306 __maybe_unused) 307 { 308 dump_printf(": unhandled!\n"); 309 return 0; 310 } 311 312 static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused, 313 union perf_event *event __maybe_unused, 314 struct evlist **pevlist 315 __maybe_unused) 316 { 317 if (dump_trace) 318 perf_event__fprintf_event_update(event, stdout); 319 320 dump_printf(": unhandled!\n"); 321 return 0; 322 } 323 324 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused, 325 union perf_event *event __maybe_unused, 326 struct perf_sample *sample __maybe_unused, 327 struct evsel *evsel __maybe_unused, 328 struct machine *machine __maybe_unused) 329 { 330 dump_printf(": unhandled!\n"); 331 return 0; 332 } 333 334 static int process_event_stub(struct perf_tool *tool __maybe_unused, 335 union perf_event *event __maybe_unused, 336 struct perf_sample *sample __maybe_unused, 337 struct machine *machine __maybe_unused) 338 { 339 dump_printf(": unhandled!\n"); 340 return 0; 341 } 342 343 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused, 344 union perf_event *event __maybe_unused, 345 struct ordered_events *oe __maybe_unused) 346 { 347 dump_printf(": unhandled!\n"); 348 return 0; 349 } 350 351 static int process_finished_round(struct perf_tool *tool, 352 union perf_event *event, 353 struct ordered_events *oe); 354 355 static int skipn(int fd, off_t n) 356 { 357 char buf[4096]; 358 ssize_t ret; 359 360 while (n > 0) { 361 ret = read(fd, buf, min(n, (off_t)sizeof(buf))); 362 if (ret <= 0) 363 return ret; 364 n -= ret; 365 } 366 367 return 0; 368 } 369 370 static s64 process_event_auxtrace_stub(struct perf_session *session __maybe_unused, 371 union perf_event *event) 372 { 373 dump_printf(": unhandled!\n"); 374 if (perf_data__is_pipe(session->data)) 375 skipn(perf_data__fd(session->data), event->auxtrace.size); 376 return event->auxtrace.size; 377 } 378 379 static int process_event_op2_stub(struct perf_session *session __maybe_unused, 380 union perf_event *event __maybe_unused) 381 { 382 dump_printf(": unhandled!\n"); 383 return 0; 384 } 385 386 387 static 388 int process_event_thread_map_stub(struct perf_session *session __maybe_unused, 389 union perf_event *event __maybe_unused) 390 { 391 if (dump_trace) 392 perf_event__fprintf_thread_map(event, stdout); 393 394 dump_printf(": unhandled!\n"); 395 return 0; 396 } 397 398 static 399 int process_event_cpu_map_stub(struct perf_session *session __maybe_unused, 400 union perf_event *event __maybe_unused) 401 { 402 if (dump_trace) 403 perf_event__fprintf_cpu_map(event, stdout); 404 405 dump_printf(": unhandled!\n"); 406 return 0; 407 } 408 409 static 410 int process_event_stat_config_stub(struct perf_session *session __maybe_unused, 411 union perf_event *event __maybe_unused) 412 { 413 if (dump_trace) 414 perf_event__fprintf_stat_config(event, stdout); 415 416 dump_printf(": unhandled!\n"); 417 return 0; 418 } 419 420 static int process_stat_stub(struct perf_session *perf_session __maybe_unused, 421 union perf_event *event) 422 { 423 if (dump_trace) 424 perf_event__fprintf_stat(event, stdout); 425 426 dump_printf(": unhandled!\n"); 427 return 0; 428 } 429 430 static int process_stat_round_stub(struct perf_session *perf_session __maybe_unused, 431 union perf_event *event) 432 { 433 if (dump_trace) 434 perf_event__fprintf_stat_round(event, stdout); 435 436 dump_printf(": unhandled!\n"); 437 return 0; 438 } 439 440 static int perf_session__process_compressed_event_stub(struct perf_session *session __maybe_unused, 441 union perf_event *event __maybe_unused, 442 u64 file_offset __maybe_unused) 443 { 444 dump_printf(": unhandled!\n"); 445 return 0; 446 } 447 448 void perf_tool__fill_defaults(struct perf_tool *tool) 449 { 450 if (tool->sample == NULL) 451 tool->sample = process_event_sample_stub; 452 if (tool->mmap == NULL) 453 tool->mmap = process_event_stub; 454 if (tool->mmap2 == NULL) 455 tool->mmap2 = process_event_stub; 456 if (tool->comm == NULL) 457 tool->comm = process_event_stub; 458 if (tool->namespaces == NULL) 459 tool->namespaces = process_event_stub; 460 if (tool->fork == NULL) 461 tool->fork = process_event_stub; 462 if (tool->exit == NULL) 463 tool->exit = process_event_stub; 464 if (tool->lost == NULL) 465 tool->lost = perf_event__process_lost; 466 if (tool->lost_samples == NULL) 467 tool->lost_samples = perf_event__process_lost_samples; 468 if (tool->aux == NULL) 469 tool->aux = perf_event__process_aux; 470 if (tool->itrace_start == NULL) 471 tool->itrace_start = perf_event__process_itrace_start; 472 if (tool->context_switch == NULL) 473 tool->context_switch = perf_event__process_switch; 474 if (tool->ksymbol == NULL) 475 tool->ksymbol = perf_event__process_ksymbol; 476 if (tool->bpf_event == NULL) 477 tool->bpf_event = perf_event__process_bpf_event; 478 if (tool->read == NULL) 479 tool->read = process_event_sample_stub; 480 if (tool->throttle == NULL) 481 tool->throttle = process_event_stub; 482 if (tool->unthrottle == NULL) 483 tool->unthrottle = process_event_stub; 484 if (tool->attr == NULL) 485 tool->attr = process_event_synth_attr_stub; 486 if (tool->event_update == NULL) 487 tool->event_update = process_event_synth_event_update_stub; 488 if (tool->tracing_data == NULL) 489 tool->tracing_data = process_event_synth_tracing_data_stub; 490 if (tool->build_id == NULL) 491 tool->build_id = process_event_op2_stub; 492 if (tool->finished_round == NULL) { 493 if (tool->ordered_events) 494 tool->finished_round = process_finished_round; 495 else 496 tool->finished_round = process_finished_round_stub; 497 } 498 if (tool->id_index == NULL) 499 tool->id_index = process_event_op2_stub; 500 if (tool->auxtrace_info == NULL) 501 tool->auxtrace_info = process_event_op2_stub; 502 if (tool->auxtrace == NULL) 503 tool->auxtrace = process_event_auxtrace_stub; 504 if (tool->auxtrace_error == NULL) 505 tool->auxtrace_error = process_event_op2_stub; 506 if (tool->thread_map == NULL) 507 tool->thread_map = process_event_thread_map_stub; 508 if (tool->cpu_map == NULL) 509 tool->cpu_map = process_event_cpu_map_stub; 510 if (tool->stat_config == NULL) 511 tool->stat_config = process_event_stat_config_stub; 512 if (tool->stat == NULL) 513 tool->stat = process_stat_stub; 514 if (tool->stat_round == NULL) 515 tool->stat_round = process_stat_round_stub; 516 if (tool->time_conv == NULL) 517 tool->time_conv = process_event_op2_stub; 518 if (tool->feature == NULL) 519 tool->feature = process_event_op2_stub; 520 if (tool->compressed == NULL) 521 tool->compressed = perf_session__process_compressed_event; 522 } 523 524 static void swap_sample_id_all(union perf_event *event, void *data) 525 { 526 void *end = (void *) event + event->header.size; 527 int size = end - data; 528 529 BUG_ON(size % sizeof(u64)); 530 mem_bswap_64(data, size); 531 } 532 533 static void perf_event__all64_swap(union perf_event *event, 534 bool sample_id_all __maybe_unused) 535 { 536 struct perf_event_header *hdr = &event->header; 537 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 538 } 539 540 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 541 { 542 event->comm.pid = bswap_32(event->comm.pid); 543 event->comm.tid = bswap_32(event->comm.tid); 544 545 if (sample_id_all) { 546 void *data = &event->comm.comm; 547 548 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 549 swap_sample_id_all(event, data); 550 } 551 } 552 553 static void perf_event__mmap_swap(union perf_event *event, 554 bool sample_id_all) 555 { 556 event->mmap.pid = bswap_32(event->mmap.pid); 557 event->mmap.tid = bswap_32(event->mmap.tid); 558 event->mmap.start = bswap_64(event->mmap.start); 559 event->mmap.len = bswap_64(event->mmap.len); 560 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 561 562 if (sample_id_all) { 563 void *data = &event->mmap.filename; 564 565 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 566 swap_sample_id_all(event, data); 567 } 568 } 569 570 static void perf_event__mmap2_swap(union perf_event *event, 571 bool sample_id_all) 572 { 573 event->mmap2.pid = bswap_32(event->mmap2.pid); 574 event->mmap2.tid = bswap_32(event->mmap2.tid); 575 event->mmap2.start = bswap_64(event->mmap2.start); 576 event->mmap2.len = bswap_64(event->mmap2.len); 577 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); 578 event->mmap2.maj = bswap_32(event->mmap2.maj); 579 event->mmap2.min = bswap_32(event->mmap2.min); 580 event->mmap2.ino = bswap_64(event->mmap2.ino); 581 582 if (sample_id_all) { 583 void *data = &event->mmap2.filename; 584 585 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 586 swap_sample_id_all(event, data); 587 } 588 } 589 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 590 { 591 event->fork.pid = bswap_32(event->fork.pid); 592 event->fork.tid = bswap_32(event->fork.tid); 593 event->fork.ppid = bswap_32(event->fork.ppid); 594 event->fork.ptid = bswap_32(event->fork.ptid); 595 event->fork.time = bswap_64(event->fork.time); 596 597 if (sample_id_all) 598 swap_sample_id_all(event, &event->fork + 1); 599 } 600 601 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 602 { 603 event->read.pid = bswap_32(event->read.pid); 604 event->read.tid = bswap_32(event->read.tid); 605 event->read.value = bswap_64(event->read.value); 606 event->read.time_enabled = bswap_64(event->read.time_enabled); 607 event->read.time_running = bswap_64(event->read.time_running); 608 event->read.id = bswap_64(event->read.id); 609 610 if (sample_id_all) 611 swap_sample_id_all(event, &event->read + 1); 612 } 613 614 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all) 615 { 616 event->aux.aux_offset = bswap_64(event->aux.aux_offset); 617 event->aux.aux_size = bswap_64(event->aux.aux_size); 618 event->aux.flags = bswap_64(event->aux.flags); 619 620 if (sample_id_all) 621 swap_sample_id_all(event, &event->aux + 1); 622 } 623 624 static void perf_event__itrace_start_swap(union perf_event *event, 625 bool sample_id_all) 626 { 627 event->itrace_start.pid = bswap_32(event->itrace_start.pid); 628 event->itrace_start.tid = bswap_32(event->itrace_start.tid); 629 630 if (sample_id_all) 631 swap_sample_id_all(event, &event->itrace_start + 1); 632 } 633 634 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all) 635 { 636 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) { 637 event->context_switch.next_prev_pid = 638 bswap_32(event->context_switch.next_prev_pid); 639 event->context_switch.next_prev_tid = 640 bswap_32(event->context_switch.next_prev_tid); 641 } 642 643 if (sample_id_all) 644 swap_sample_id_all(event, &event->context_switch + 1); 645 } 646 647 static void perf_event__throttle_swap(union perf_event *event, 648 bool sample_id_all) 649 { 650 event->throttle.time = bswap_64(event->throttle.time); 651 event->throttle.id = bswap_64(event->throttle.id); 652 event->throttle.stream_id = bswap_64(event->throttle.stream_id); 653 654 if (sample_id_all) 655 swap_sample_id_all(event, &event->throttle + 1); 656 } 657 658 static void perf_event__namespaces_swap(union perf_event *event, 659 bool sample_id_all) 660 { 661 u64 i; 662 663 event->namespaces.pid = bswap_32(event->namespaces.pid); 664 event->namespaces.tid = bswap_32(event->namespaces.tid); 665 event->namespaces.nr_namespaces = bswap_64(event->namespaces.nr_namespaces); 666 667 for (i = 0; i < event->namespaces.nr_namespaces; i++) { 668 struct perf_ns_link_info *ns = &event->namespaces.link_info[i]; 669 670 ns->dev = bswap_64(ns->dev); 671 ns->ino = bswap_64(ns->ino); 672 } 673 674 if (sample_id_all) 675 swap_sample_id_all(event, &event->namespaces.link_info[i]); 676 } 677 678 static u8 revbyte(u8 b) 679 { 680 int rev = (b >> 4) | ((b & 0xf) << 4); 681 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 682 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 683 return (u8) rev; 684 } 685 686 /* 687 * XXX this is hack in attempt to carry flags bitfield 688 * through endian village. ABI says: 689 * 690 * Bit-fields are allocated from right to left (least to most significant) 691 * on little-endian implementations and from left to right (most to least 692 * significant) on big-endian implementations. 693 * 694 * The above seems to be byte specific, so we need to reverse each 695 * byte of the bitfield. 'Internet' also says this might be implementation 696 * specific and we probably need proper fix and carry perf_event_attr 697 * bitfield flags in separate data file FEAT_ section. Thought this seems 698 * to work for now. 699 */ 700 static void swap_bitfield(u8 *p, unsigned len) 701 { 702 unsigned i; 703 704 for (i = 0; i < len; i++) { 705 *p = revbyte(*p); 706 p++; 707 } 708 } 709 710 /* exported for swapping attributes in file header */ 711 void perf_event__attr_swap(struct perf_event_attr *attr) 712 { 713 attr->type = bswap_32(attr->type); 714 attr->size = bswap_32(attr->size); 715 716 #define bswap_safe(f, n) \ 717 (attr->size > (offsetof(struct perf_event_attr, f) + \ 718 sizeof(attr->f) * (n))) 719 #define bswap_field(f, sz) \ 720 do { \ 721 if (bswap_safe(f, 0)) \ 722 attr->f = bswap_##sz(attr->f); \ 723 } while(0) 724 #define bswap_field_16(f) bswap_field(f, 16) 725 #define bswap_field_32(f) bswap_field(f, 32) 726 #define bswap_field_64(f) bswap_field(f, 64) 727 728 bswap_field_64(config); 729 bswap_field_64(sample_period); 730 bswap_field_64(sample_type); 731 bswap_field_64(read_format); 732 bswap_field_32(wakeup_events); 733 bswap_field_32(bp_type); 734 bswap_field_64(bp_addr); 735 bswap_field_64(bp_len); 736 bswap_field_64(branch_sample_type); 737 bswap_field_64(sample_regs_user); 738 bswap_field_32(sample_stack_user); 739 bswap_field_32(aux_watermark); 740 bswap_field_16(sample_max_stack); 741 742 /* 743 * After read_format are bitfields. Check read_format because 744 * we are unable to use offsetof on bitfield. 745 */ 746 if (bswap_safe(read_format, 1)) 747 swap_bitfield((u8 *) (&attr->read_format + 1), 748 sizeof(u64)); 749 #undef bswap_field_64 750 #undef bswap_field_32 751 #undef bswap_field 752 #undef bswap_safe 753 } 754 755 static void perf_event__hdr_attr_swap(union perf_event *event, 756 bool sample_id_all __maybe_unused) 757 { 758 size_t size; 759 760 perf_event__attr_swap(&event->attr.attr); 761 762 size = event->header.size; 763 size -= (void *)&event->attr.id - (void *)event; 764 mem_bswap_64(event->attr.id, size); 765 } 766 767 static void perf_event__event_update_swap(union perf_event *event, 768 bool sample_id_all __maybe_unused) 769 { 770 event->event_update.type = bswap_64(event->event_update.type); 771 event->event_update.id = bswap_64(event->event_update.id); 772 } 773 774 static void perf_event__event_type_swap(union perf_event *event, 775 bool sample_id_all __maybe_unused) 776 { 777 event->event_type.event_type.event_id = 778 bswap_64(event->event_type.event_type.event_id); 779 } 780 781 static void perf_event__tracing_data_swap(union perf_event *event, 782 bool sample_id_all __maybe_unused) 783 { 784 event->tracing_data.size = bswap_32(event->tracing_data.size); 785 } 786 787 static void perf_event__auxtrace_info_swap(union perf_event *event, 788 bool sample_id_all __maybe_unused) 789 { 790 size_t size; 791 792 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type); 793 794 size = event->header.size; 795 size -= (void *)&event->auxtrace_info.priv - (void *)event; 796 mem_bswap_64(event->auxtrace_info.priv, size); 797 } 798 799 static void perf_event__auxtrace_swap(union perf_event *event, 800 bool sample_id_all __maybe_unused) 801 { 802 event->auxtrace.size = bswap_64(event->auxtrace.size); 803 event->auxtrace.offset = bswap_64(event->auxtrace.offset); 804 event->auxtrace.reference = bswap_64(event->auxtrace.reference); 805 event->auxtrace.idx = bswap_32(event->auxtrace.idx); 806 event->auxtrace.tid = bswap_32(event->auxtrace.tid); 807 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu); 808 } 809 810 static void perf_event__auxtrace_error_swap(union perf_event *event, 811 bool sample_id_all __maybe_unused) 812 { 813 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type); 814 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code); 815 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu); 816 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid); 817 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid); 818 event->auxtrace_error.fmt = bswap_32(event->auxtrace_error.fmt); 819 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip); 820 if (event->auxtrace_error.fmt) 821 event->auxtrace_error.time = bswap_64(event->auxtrace_error.time); 822 } 823 824 static void perf_event__thread_map_swap(union perf_event *event, 825 bool sample_id_all __maybe_unused) 826 { 827 unsigned i; 828 829 event->thread_map.nr = bswap_64(event->thread_map.nr); 830 831 for (i = 0; i < event->thread_map.nr; i++) 832 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid); 833 } 834 835 static void perf_event__cpu_map_swap(union perf_event *event, 836 bool sample_id_all __maybe_unused) 837 { 838 struct cpu_map_data *data = &event->cpu_map.data; 839 struct cpu_map_entries *cpus; 840 struct cpu_map_mask *mask; 841 unsigned i; 842 843 data->type = bswap_64(data->type); 844 845 switch (data->type) { 846 case PERF_CPU_MAP__CPUS: 847 cpus = (struct cpu_map_entries *)data->data; 848 849 cpus->nr = bswap_16(cpus->nr); 850 851 for (i = 0; i < cpus->nr; i++) 852 cpus->cpu[i] = bswap_16(cpus->cpu[i]); 853 break; 854 case PERF_CPU_MAP__MASK: 855 mask = (struct cpu_map_mask *) data->data; 856 857 mask->nr = bswap_16(mask->nr); 858 mask->long_size = bswap_16(mask->long_size); 859 860 switch (mask->long_size) { 861 case 4: mem_bswap_32(&mask->mask, mask->nr); break; 862 case 8: mem_bswap_64(&mask->mask, mask->nr); break; 863 default: 864 pr_err("cpu_map swap: unsupported long size\n"); 865 } 866 default: 867 break; 868 } 869 } 870 871 static void perf_event__stat_config_swap(union perf_event *event, 872 bool sample_id_all __maybe_unused) 873 { 874 u64 size; 875 876 size = event->stat_config.nr * sizeof(event->stat_config.data[0]); 877 size += 1; /* nr item itself */ 878 mem_bswap_64(&event->stat_config.nr, size); 879 } 880 881 static void perf_event__stat_swap(union perf_event *event, 882 bool sample_id_all __maybe_unused) 883 { 884 event->stat.id = bswap_64(event->stat.id); 885 event->stat.thread = bswap_32(event->stat.thread); 886 event->stat.cpu = bswap_32(event->stat.cpu); 887 event->stat.val = bswap_64(event->stat.val); 888 event->stat.ena = bswap_64(event->stat.ena); 889 event->stat.run = bswap_64(event->stat.run); 890 } 891 892 static void perf_event__stat_round_swap(union perf_event *event, 893 bool sample_id_all __maybe_unused) 894 { 895 event->stat_round.type = bswap_64(event->stat_round.type); 896 event->stat_round.time = bswap_64(event->stat_round.time); 897 } 898 899 typedef void (*perf_event__swap_op)(union perf_event *event, 900 bool sample_id_all); 901 902 static perf_event__swap_op perf_event__swap_ops[] = { 903 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 904 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap, 905 [PERF_RECORD_COMM] = perf_event__comm_swap, 906 [PERF_RECORD_FORK] = perf_event__task_swap, 907 [PERF_RECORD_EXIT] = perf_event__task_swap, 908 [PERF_RECORD_LOST] = perf_event__all64_swap, 909 [PERF_RECORD_READ] = perf_event__read_swap, 910 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap, 911 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap, 912 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 913 [PERF_RECORD_AUX] = perf_event__aux_swap, 914 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap, 915 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap, 916 [PERF_RECORD_SWITCH] = perf_event__switch_swap, 917 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap, 918 [PERF_RECORD_NAMESPACES] = perf_event__namespaces_swap, 919 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 920 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 921 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 922 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 923 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap, 924 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap, 925 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap, 926 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap, 927 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap, 928 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap, 929 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap, 930 [PERF_RECORD_STAT] = perf_event__stat_swap, 931 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap, 932 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap, 933 [PERF_RECORD_TIME_CONV] = perf_event__all64_swap, 934 [PERF_RECORD_HEADER_MAX] = NULL, 935 }; 936 937 /* 938 * When perf record finishes a pass on every buffers, it records this pseudo 939 * event. 940 * We record the max timestamp t found in the pass n. 941 * Assuming these timestamps are monotonic across cpus, we know that if 942 * a buffer still has events with timestamps below t, they will be all 943 * available and then read in the pass n + 1. 944 * Hence when we start to read the pass n + 2, we can safely flush every 945 * events with timestamps below t. 946 * 947 * ============ PASS n ================= 948 * CPU 0 | CPU 1 949 * | 950 * cnt1 timestamps | cnt2 timestamps 951 * 1 | 2 952 * 2 | 3 953 * - | 4 <--- max recorded 954 * 955 * ============ PASS n + 1 ============== 956 * CPU 0 | CPU 1 957 * | 958 * cnt1 timestamps | cnt2 timestamps 959 * 3 | 5 960 * 4 | 6 961 * 5 | 7 <---- max recorded 962 * 963 * Flush every events below timestamp 4 964 * 965 * ============ PASS n + 2 ============== 966 * CPU 0 | CPU 1 967 * | 968 * cnt1 timestamps | cnt2 timestamps 969 * 6 | 8 970 * 7 | 9 971 * - | 10 972 * 973 * Flush every events below timestamp 7 974 * etc... 975 */ 976 static int process_finished_round(struct perf_tool *tool __maybe_unused, 977 union perf_event *event __maybe_unused, 978 struct ordered_events *oe) 979 { 980 if (dump_trace) 981 fprintf(stdout, "\n"); 982 return ordered_events__flush(oe, OE_FLUSH__ROUND); 983 } 984 985 int perf_session__queue_event(struct perf_session *s, union perf_event *event, 986 u64 timestamp, u64 file_offset) 987 { 988 return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset); 989 } 990 991 static void callchain__lbr_callstack_printf(struct perf_sample *sample) 992 { 993 struct ip_callchain *callchain = sample->callchain; 994 struct branch_stack *lbr_stack = sample->branch_stack; 995 u64 kernel_callchain_nr = callchain->nr; 996 unsigned int i; 997 998 for (i = 0; i < kernel_callchain_nr; i++) { 999 if (callchain->ips[i] == PERF_CONTEXT_USER) 1000 break; 1001 } 1002 1003 if ((i != kernel_callchain_nr) && lbr_stack->nr) { 1004 u64 total_nr; 1005 /* 1006 * LBR callstack can only get user call chain, 1007 * i is kernel call chain number, 1008 * 1 is PERF_CONTEXT_USER. 1009 * 1010 * The user call chain is stored in LBR registers. 1011 * LBR are pair registers. The caller is stored 1012 * in "from" register, while the callee is stored 1013 * in "to" register. 1014 * For example, there is a call stack 1015 * "A"->"B"->"C"->"D". 1016 * The LBR registers will recorde like 1017 * "C"->"D", "B"->"C", "A"->"B". 1018 * So only the first "to" register and all "from" 1019 * registers are needed to construct the whole stack. 1020 */ 1021 total_nr = i + 1 + lbr_stack->nr + 1; 1022 kernel_callchain_nr = i + 1; 1023 1024 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr); 1025 1026 for (i = 0; i < kernel_callchain_nr; i++) 1027 printf("..... %2d: %016" PRIx64 "\n", 1028 i, callchain->ips[i]); 1029 1030 printf("..... %2d: %016" PRIx64 "\n", 1031 (int)(kernel_callchain_nr), lbr_stack->entries[0].to); 1032 for (i = 0; i < lbr_stack->nr; i++) 1033 printf("..... %2d: %016" PRIx64 "\n", 1034 (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from); 1035 } 1036 } 1037 1038 static void callchain__printf(struct evsel *evsel, 1039 struct perf_sample *sample) 1040 { 1041 unsigned int i; 1042 struct ip_callchain *callchain = sample->callchain; 1043 1044 if (perf_evsel__has_branch_callstack(evsel)) 1045 callchain__lbr_callstack_printf(sample); 1046 1047 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr); 1048 1049 for (i = 0; i < callchain->nr; i++) 1050 printf("..... %2d: %016" PRIx64 "\n", 1051 i, callchain->ips[i]); 1052 } 1053 1054 static void branch_stack__printf(struct perf_sample *sample) 1055 { 1056 uint64_t i; 1057 1058 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr); 1059 1060 for (i = 0; i < sample->branch_stack->nr; i++) { 1061 struct branch_entry *e = &sample->branch_stack->entries[i]; 1062 1063 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n", 1064 i, e->from, e->to, 1065 (unsigned short)e->flags.cycles, 1066 e->flags.mispred ? "M" : " ", 1067 e->flags.predicted ? "P" : " ", 1068 e->flags.abort ? "A" : " ", 1069 e->flags.in_tx ? "T" : " ", 1070 (unsigned)e->flags.reserved); 1071 } 1072 } 1073 1074 static void regs_dump__printf(u64 mask, u64 *regs) 1075 { 1076 unsigned rid, i = 0; 1077 1078 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { 1079 u64 val = regs[i++]; 1080 1081 printf(".... %-5s 0x%" PRIx64 "\n", 1082 perf_reg_name(rid), val); 1083 } 1084 } 1085 1086 static const char *regs_abi[] = { 1087 [PERF_SAMPLE_REGS_ABI_NONE] = "none", 1088 [PERF_SAMPLE_REGS_ABI_32] = "32-bit", 1089 [PERF_SAMPLE_REGS_ABI_64] = "64-bit", 1090 }; 1091 1092 static inline const char *regs_dump_abi(struct regs_dump *d) 1093 { 1094 if (d->abi > PERF_SAMPLE_REGS_ABI_64) 1095 return "unknown"; 1096 1097 return regs_abi[d->abi]; 1098 } 1099 1100 static void regs__printf(const char *type, struct regs_dump *regs) 1101 { 1102 u64 mask = regs->mask; 1103 1104 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n", 1105 type, 1106 mask, 1107 regs_dump_abi(regs)); 1108 1109 regs_dump__printf(mask, regs->regs); 1110 } 1111 1112 static void regs_user__printf(struct perf_sample *sample) 1113 { 1114 struct regs_dump *user_regs = &sample->user_regs; 1115 1116 if (user_regs->regs) 1117 regs__printf("user", user_regs); 1118 } 1119 1120 static void regs_intr__printf(struct perf_sample *sample) 1121 { 1122 struct regs_dump *intr_regs = &sample->intr_regs; 1123 1124 if (intr_regs->regs) 1125 regs__printf("intr", intr_regs); 1126 } 1127 1128 static void stack_user__printf(struct stack_dump *dump) 1129 { 1130 printf("... ustack: size %" PRIu64 ", offset 0x%x\n", 1131 dump->size, dump->offset); 1132 } 1133 1134 static void perf_evlist__print_tstamp(struct evlist *evlist, 1135 union perf_event *event, 1136 struct perf_sample *sample) 1137 { 1138 u64 sample_type = __perf_evlist__combined_sample_type(evlist); 1139 1140 if (event->header.type != PERF_RECORD_SAMPLE && 1141 !perf_evlist__sample_id_all(evlist)) { 1142 fputs("-1 -1 ", stdout); 1143 return; 1144 } 1145 1146 if ((sample_type & PERF_SAMPLE_CPU)) 1147 printf("%u ", sample->cpu); 1148 1149 if (sample_type & PERF_SAMPLE_TIME) 1150 printf("%" PRIu64 " ", sample->time); 1151 } 1152 1153 static void sample_read__printf(struct perf_sample *sample, u64 read_format) 1154 { 1155 printf("... sample_read:\n"); 1156 1157 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1158 printf("...... time enabled %016" PRIx64 "\n", 1159 sample->read.time_enabled); 1160 1161 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1162 printf("...... time running %016" PRIx64 "\n", 1163 sample->read.time_running); 1164 1165 if (read_format & PERF_FORMAT_GROUP) { 1166 u64 i; 1167 1168 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr); 1169 1170 for (i = 0; i < sample->read.group.nr; i++) { 1171 struct sample_read_value *value; 1172 1173 value = &sample->read.group.values[i]; 1174 printf("..... id %016" PRIx64 1175 ", value %016" PRIx64 "\n", 1176 value->id, value->value); 1177 } 1178 } else 1179 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n", 1180 sample->read.one.id, sample->read.one.value); 1181 } 1182 1183 static void dump_event(struct evlist *evlist, union perf_event *event, 1184 u64 file_offset, struct perf_sample *sample) 1185 { 1186 if (!dump_trace) 1187 return; 1188 1189 printf("\n%#" PRIx64 " [%#x]: event: %d\n", 1190 file_offset, event->header.size, event->header.type); 1191 1192 trace_event(event); 1193 if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw) 1194 evlist->trace_event_sample_raw(evlist, event, sample); 1195 1196 if (sample) 1197 perf_evlist__print_tstamp(evlist, event, sample); 1198 1199 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 1200 event->header.size, perf_event__name(event->header.type)); 1201 } 1202 1203 static void dump_sample(struct evsel *evsel, union perf_event *event, 1204 struct perf_sample *sample) 1205 { 1206 u64 sample_type; 1207 1208 if (!dump_trace) 1209 return; 1210 1211 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 1212 event->header.misc, sample->pid, sample->tid, sample->ip, 1213 sample->period, sample->addr); 1214 1215 sample_type = evsel->core.attr.sample_type; 1216 1217 if (evsel__has_callchain(evsel)) 1218 callchain__printf(evsel, sample); 1219 1220 if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !perf_evsel__has_branch_callstack(evsel)) 1221 branch_stack__printf(sample); 1222 1223 if (sample_type & PERF_SAMPLE_REGS_USER) 1224 regs_user__printf(sample); 1225 1226 if (sample_type & PERF_SAMPLE_REGS_INTR) 1227 regs_intr__printf(sample); 1228 1229 if (sample_type & PERF_SAMPLE_STACK_USER) 1230 stack_user__printf(&sample->user_stack); 1231 1232 if (sample_type & PERF_SAMPLE_WEIGHT) 1233 printf("... weight: %" PRIu64 "\n", sample->weight); 1234 1235 if (sample_type & PERF_SAMPLE_DATA_SRC) 1236 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src); 1237 1238 if (sample_type & PERF_SAMPLE_PHYS_ADDR) 1239 printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr); 1240 1241 if (sample_type & PERF_SAMPLE_TRANSACTION) 1242 printf("... transaction: %" PRIx64 "\n", sample->transaction); 1243 1244 if (sample_type & PERF_SAMPLE_READ) 1245 sample_read__printf(sample, evsel->core.attr.read_format); 1246 } 1247 1248 static void dump_read(struct evsel *evsel, union perf_event *event) 1249 { 1250 struct read_event *read_event = &event->read; 1251 u64 read_format; 1252 1253 if (!dump_trace) 1254 return; 1255 1256 printf(": %d %d %s %" PRIu64 "\n", event->read.pid, event->read.tid, 1257 perf_evsel__name(evsel), 1258 event->read.value); 1259 1260 if (!evsel) 1261 return; 1262 1263 read_format = evsel->core.attr.read_format; 1264 1265 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1266 printf("... time enabled : %" PRIu64 "\n", read_event->time_enabled); 1267 1268 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1269 printf("... time running : %" PRIu64 "\n", read_event->time_running); 1270 1271 if (read_format & PERF_FORMAT_ID) 1272 printf("... id : %" PRIu64 "\n", read_event->id); 1273 } 1274 1275 static struct machine *machines__find_for_cpumode(struct machines *machines, 1276 union perf_event *event, 1277 struct perf_sample *sample) 1278 { 1279 struct machine *machine; 1280 1281 if (perf_guest && 1282 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 1283 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) { 1284 u32 pid; 1285 1286 if (event->header.type == PERF_RECORD_MMAP 1287 || event->header.type == PERF_RECORD_MMAP2) 1288 pid = event->mmap.pid; 1289 else 1290 pid = sample->pid; 1291 1292 machine = machines__find(machines, pid); 1293 if (!machine) 1294 machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID); 1295 return machine; 1296 } 1297 1298 return &machines->host; 1299 } 1300 1301 static int deliver_sample_value(struct evlist *evlist, 1302 struct perf_tool *tool, 1303 union perf_event *event, 1304 struct perf_sample *sample, 1305 struct sample_read_value *v, 1306 struct machine *machine) 1307 { 1308 struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id); 1309 1310 if (sid) { 1311 sample->id = v->id; 1312 sample->period = v->value - sid->period; 1313 sid->period = v->value; 1314 } 1315 1316 if (!sid || sid->evsel == NULL) { 1317 ++evlist->stats.nr_unknown_id; 1318 return 0; 1319 } 1320 1321 /* 1322 * There's no reason to deliver sample 1323 * for zero period, bail out. 1324 */ 1325 if (!sample->period) 1326 return 0; 1327 1328 return tool->sample(tool, event, sample, sid->evsel, machine); 1329 } 1330 1331 static int deliver_sample_group(struct evlist *evlist, 1332 struct perf_tool *tool, 1333 union perf_event *event, 1334 struct perf_sample *sample, 1335 struct machine *machine) 1336 { 1337 int ret = -EINVAL; 1338 u64 i; 1339 1340 for (i = 0; i < sample->read.group.nr; i++) { 1341 ret = deliver_sample_value(evlist, tool, event, sample, 1342 &sample->read.group.values[i], 1343 machine); 1344 if (ret) 1345 break; 1346 } 1347 1348 return ret; 1349 } 1350 1351 static int 1352 perf_evlist__deliver_sample(struct evlist *evlist, 1353 struct perf_tool *tool, 1354 union perf_event *event, 1355 struct perf_sample *sample, 1356 struct evsel *evsel, 1357 struct machine *machine) 1358 { 1359 /* We know evsel != NULL. */ 1360 u64 sample_type = evsel->core.attr.sample_type; 1361 u64 read_format = evsel->core.attr.read_format; 1362 1363 /* Standard sample delivery. */ 1364 if (!(sample_type & PERF_SAMPLE_READ)) 1365 return tool->sample(tool, event, sample, evsel, machine); 1366 1367 /* For PERF_SAMPLE_READ we have either single or group mode. */ 1368 if (read_format & PERF_FORMAT_GROUP) 1369 return deliver_sample_group(evlist, tool, event, sample, 1370 machine); 1371 else 1372 return deliver_sample_value(evlist, tool, event, sample, 1373 &sample->read.one, machine); 1374 } 1375 1376 static int machines__deliver_event(struct machines *machines, 1377 struct evlist *evlist, 1378 union perf_event *event, 1379 struct perf_sample *sample, 1380 struct perf_tool *tool, u64 file_offset) 1381 { 1382 struct evsel *evsel; 1383 struct machine *machine; 1384 1385 dump_event(evlist, event, file_offset, sample); 1386 1387 evsel = perf_evlist__id2evsel(evlist, sample->id); 1388 1389 machine = machines__find_for_cpumode(machines, event, sample); 1390 1391 switch (event->header.type) { 1392 case PERF_RECORD_SAMPLE: 1393 if (evsel == NULL) { 1394 ++evlist->stats.nr_unknown_id; 1395 return 0; 1396 } 1397 dump_sample(evsel, event, sample); 1398 if (machine == NULL) { 1399 ++evlist->stats.nr_unprocessable_samples; 1400 return 0; 1401 } 1402 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine); 1403 case PERF_RECORD_MMAP: 1404 return tool->mmap(tool, event, sample, machine); 1405 case PERF_RECORD_MMAP2: 1406 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT) 1407 ++evlist->stats.nr_proc_map_timeout; 1408 return tool->mmap2(tool, event, sample, machine); 1409 case PERF_RECORD_COMM: 1410 return tool->comm(tool, event, sample, machine); 1411 case PERF_RECORD_NAMESPACES: 1412 return tool->namespaces(tool, event, sample, machine); 1413 case PERF_RECORD_FORK: 1414 return tool->fork(tool, event, sample, machine); 1415 case PERF_RECORD_EXIT: 1416 return tool->exit(tool, event, sample, machine); 1417 case PERF_RECORD_LOST: 1418 if (tool->lost == perf_event__process_lost) 1419 evlist->stats.total_lost += event->lost.lost; 1420 return tool->lost(tool, event, sample, machine); 1421 case PERF_RECORD_LOST_SAMPLES: 1422 if (tool->lost_samples == perf_event__process_lost_samples) 1423 evlist->stats.total_lost_samples += event->lost_samples.lost; 1424 return tool->lost_samples(tool, event, sample, machine); 1425 case PERF_RECORD_READ: 1426 dump_read(evsel, event); 1427 return tool->read(tool, event, sample, evsel, machine); 1428 case PERF_RECORD_THROTTLE: 1429 return tool->throttle(tool, event, sample, machine); 1430 case PERF_RECORD_UNTHROTTLE: 1431 return tool->unthrottle(tool, event, sample, machine); 1432 case PERF_RECORD_AUX: 1433 if (tool->aux == perf_event__process_aux) { 1434 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) 1435 evlist->stats.total_aux_lost += 1; 1436 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL) 1437 evlist->stats.total_aux_partial += 1; 1438 } 1439 return tool->aux(tool, event, sample, machine); 1440 case PERF_RECORD_ITRACE_START: 1441 return tool->itrace_start(tool, event, sample, machine); 1442 case PERF_RECORD_SWITCH: 1443 case PERF_RECORD_SWITCH_CPU_WIDE: 1444 return tool->context_switch(tool, event, sample, machine); 1445 case PERF_RECORD_KSYMBOL: 1446 return tool->ksymbol(tool, event, sample, machine); 1447 case PERF_RECORD_BPF_EVENT: 1448 return tool->bpf_event(tool, event, sample, machine); 1449 default: 1450 ++evlist->stats.nr_unknown_events; 1451 return -1; 1452 } 1453 } 1454 1455 static int perf_session__deliver_event(struct perf_session *session, 1456 union perf_event *event, 1457 struct perf_tool *tool, 1458 u64 file_offset) 1459 { 1460 struct perf_sample sample; 1461 int ret; 1462 1463 ret = perf_evlist__parse_sample(session->evlist, event, &sample); 1464 if (ret) { 1465 pr_err("Can't parse sample, err = %d\n", ret); 1466 return ret; 1467 } 1468 1469 ret = auxtrace__process_event(session, event, &sample, tool); 1470 if (ret < 0) 1471 return ret; 1472 if (ret > 0) 1473 return 0; 1474 1475 return machines__deliver_event(&session->machines, session->evlist, 1476 event, &sample, tool, file_offset); 1477 } 1478 1479 static s64 perf_session__process_user_event(struct perf_session *session, 1480 union perf_event *event, 1481 u64 file_offset) 1482 { 1483 struct ordered_events *oe = &session->ordered_events; 1484 struct perf_tool *tool = session->tool; 1485 struct perf_sample sample = { .time = 0, }; 1486 int fd = perf_data__fd(session->data); 1487 int err; 1488 1489 if (event->header.type != PERF_RECORD_COMPRESSED || 1490 tool->compressed == perf_session__process_compressed_event_stub) 1491 dump_event(session->evlist, event, file_offset, &sample); 1492 1493 /* These events are processed right away */ 1494 switch (event->header.type) { 1495 case PERF_RECORD_HEADER_ATTR: 1496 err = tool->attr(tool, event, &session->evlist); 1497 if (err == 0) { 1498 perf_session__set_id_hdr_size(session); 1499 perf_session__set_comm_exec(session); 1500 } 1501 return err; 1502 case PERF_RECORD_EVENT_UPDATE: 1503 return tool->event_update(tool, event, &session->evlist); 1504 case PERF_RECORD_HEADER_EVENT_TYPE: 1505 /* 1506 * Depreceated, but we need to handle it for sake 1507 * of old data files create in pipe mode. 1508 */ 1509 return 0; 1510 case PERF_RECORD_HEADER_TRACING_DATA: 1511 /* setup for reading amidst mmap */ 1512 lseek(fd, file_offset, SEEK_SET); 1513 return tool->tracing_data(session, event); 1514 case PERF_RECORD_HEADER_BUILD_ID: 1515 return tool->build_id(session, event); 1516 case PERF_RECORD_FINISHED_ROUND: 1517 return tool->finished_round(tool, event, oe); 1518 case PERF_RECORD_ID_INDEX: 1519 return tool->id_index(session, event); 1520 case PERF_RECORD_AUXTRACE_INFO: 1521 return tool->auxtrace_info(session, event); 1522 case PERF_RECORD_AUXTRACE: 1523 /* setup for reading amidst mmap */ 1524 lseek(fd, file_offset + event->header.size, SEEK_SET); 1525 return tool->auxtrace(session, event); 1526 case PERF_RECORD_AUXTRACE_ERROR: 1527 perf_session__auxtrace_error_inc(session, event); 1528 return tool->auxtrace_error(session, event); 1529 case PERF_RECORD_THREAD_MAP: 1530 return tool->thread_map(session, event); 1531 case PERF_RECORD_CPU_MAP: 1532 return tool->cpu_map(session, event); 1533 case PERF_RECORD_STAT_CONFIG: 1534 return tool->stat_config(session, event); 1535 case PERF_RECORD_STAT: 1536 return tool->stat(session, event); 1537 case PERF_RECORD_STAT_ROUND: 1538 return tool->stat_round(session, event); 1539 case PERF_RECORD_TIME_CONV: 1540 session->time_conv = event->time_conv; 1541 return tool->time_conv(session, event); 1542 case PERF_RECORD_HEADER_FEATURE: 1543 return tool->feature(session, event); 1544 case PERF_RECORD_COMPRESSED: 1545 err = tool->compressed(session, event, file_offset); 1546 if (err) 1547 dump_event(session->evlist, event, file_offset, &sample); 1548 return err; 1549 default: 1550 return -EINVAL; 1551 } 1552 } 1553 1554 int perf_session__deliver_synth_event(struct perf_session *session, 1555 union perf_event *event, 1556 struct perf_sample *sample) 1557 { 1558 struct evlist *evlist = session->evlist; 1559 struct perf_tool *tool = session->tool; 1560 1561 events_stats__inc(&evlist->stats, event->header.type); 1562 1563 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1564 return perf_session__process_user_event(session, event, 0); 1565 1566 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0); 1567 } 1568 1569 static void event_swap(union perf_event *event, bool sample_id_all) 1570 { 1571 perf_event__swap_op swap; 1572 1573 swap = perf_event__swap_ops[event->header.type]; 1574 if (swap) 1575 swap(event, sample_id_all); 1576 } 1577 1578 int perf_session__peek_event(struct perf_session *session, off_t file_offset, 1579 void *buf, size_t buf_sz, 1580 union perf_event **event_ptr, 1581 struct perf_sample *sample) 1582 { 1583 union perf_event *event; 1584 size_t hdr_sz, rest; 1585 int fd; 1586 1587 if (session->one_mmap && !session->header.needs_swap) { 1588 event = file_offset - session->one_mmap_offset + 1589 session->one_mmap_addr; 1590 goto out_parse_sample; 1591 } 1592 1593 if (perf_data__is_pipe(session->data)) 1594 return -1; 1595 1596 fd = perf_data__fd(session->data); 1597 hdr_sz = sizeof(struct perf_event_header); 1598 1599 if (buf_sz < hdr_sz) 1600 return -1; 1601 1602 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 || 1603 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz) 1604 return -1; 1605 1606 event = (union perf_event *)buf; 1607 1608 if (session->header.needs_swap) 1609 perf_event_header__bswap(&event->header); 1610 1611 if (event->header.size < hdr_sz || event->header.size > buf_sz) 1612 return -1; 1613 1614 rest = event->header.size - hdr_sz; 1615 1616 if (readn(fd, buf, rest) != (ssize_t)rest) 1617 return -1; 1618 1619 if (session->header.needs_swap) 1620 event_swap(event, perf_evlist__sample_id_all(session->evlist)); 1621 1622 out_parse_sample: 1623 1624 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START && 1625 perf_evlist__parse_sample(session->evlist, event, sample)) 1626 return -1; 1627 1628 *event_ptr = event; 1629 1630 return 0; 1631 } 1632 1633 static s64 perf_session__process_event(struct perf_session *session, 1634 union perf_event *event, u64 file_offset) 1635 { 1636 struct evlist *evlist = session->evlist; 1637 struct perf_tool *tool = session->tool; 1638 int ret; 1639 1640 if (session->header.needs_swap) 1641 event_swap(event, perf_evlist__sample_id_all(evlist)); 1642 1643 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1644 return -EINVAL; 1645 1646 events_stats__inc(&evlist->stats, event->header.type); 1647 1648 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1649 return perf_session__process_user_event(session, event, file_offset); 1650 1651 if (tool->ordered_events) { 1652 u64 timestamp = -1ULL; 1653 1654 ret = perf_evlist__parse_sample_timestamp(evlist, event, ×tamp); 1655 if (ret && ret != -1) 1656 return ret; 1657 1658 ret = perf_session__queue_event(session, event, timestamp, file_offset); 1659 if (ret != -ETIME) 1660 return ret; 1661 } 1662 1663 return perf_session__deliver_event(session, event, tool, file_offset); 1664 } 1665 1666 void perf_event_header__bswap(struct perf_event_header *hdr) 1667 { 1668 hdr->type = bswap_32(hdr->type); 1669 hdr->misc = bswap_16(hdr->misc); 1670 hdr->size = bswap_16(hdr->size); 1671 } 1672 1673 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1674 { 1675 return machine__findnew_thread(&session->machines.host, -1, pid); 1676 } 1677 1678 /* 1679 * Threads are identified by pid and tid, and the idle task has pid == tid == 0. 1680 * So here a single thread is created for that, but actually there is a separate 1681 * idle task per cpu, so there should be one 'struct thread' per cpu, but there 1682 * is only 1. That causes problems for some tools, requiring workarounds. For 1683 * example get_idle_thread() in builtin-sched.c, or thread_stack__per_cpu(). 1684 */ 1685 int perf_session__register_idle_thread(struct perf_session *session) 1686 { 1687 struct thread *thread; 1688 int err = 0; 1689 1690 thread = machine__findnew_thread(&session->machines.host, 0, 0); 1691 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) { 1692 pr_err("problem inserting idle task.\n"); 1693 err = -1; 1694 } 1695 1696 if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) { 1697 pr_err("problem inserting idle task.\n"); 1698 err = -1; 1699 } 1700 1701 /* machine__findnew_thread() got the thread, so put it */ 1702 thread__put(thread); 1703 return err; 1704 } 1705 1706 static void 1707 perf_session__warn_order(const struct perf_session *session) 1708 { 1709 const struct ordered_events *oe = &session->ordered_events; 1710 struct evsel *evsel; 1711 bool should_warn = true; 1712 1713 evlist__for_each_entry(session->evlist, evsel) { 1714 if (evsel->core.attr.write_backward) 1715 should_warn = false; 1716 } 1717 1718 if (!should_warn) 1719 return; 1720 if (oe->nr_unordered_events != 0) 1721 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events); 1722 } 1723 1724 static void perf_session__warn_about_errors(const struct perf_session *session) 1725 { 1726 const struct events_stats *stats = &session->evlist->stats; 1727 1728 if (session->tool->lost == perf_event__process_lost && 1729 stats->nr_events[PERF_RECORD_LOST] != 0) { 1730 ui__warning("Processed %d events and lost %d chunks!\n\n" 1731 "Check IO/CPU overload!\n\n", 1732 stats->nr_events[0], 1733 stats->nr_events[PERF_RECORD_LOST]); 1734 } 1735 1736 if (session->tool->lost_samples == perf_event__process_lost_samples) { 1737 double drop_rate; 1738 1739 drop_rate = (double)stats->total_lost_samples / 1740 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples); 1741 if (drop_rate > 0.05) { 1742 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n", 1743 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples, 1744 drop_rate * 100.0); 1745 } 1746 } 1747 1748 if (session->tool->aux == perf_event__process_aux && 1749 stats->total_aux_lost != 0) { 1750 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n", 1751 stats->total_aux_lost, 1752 stats->nr_events[PERF_RECORD_AUX]); 1753 } 1754 1755 if (session->tool->aux == perf_event__process_aux && 1756 stats->total_aux_partial != 0) { 1757 bool vmm_exclusive = false; 1758 1759 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive", 1760 &vmm_exclusive); 1761 1762 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n" 1763 "Are you running a KVM guest in the background?%s\n\n", 1764 stats->total_aux_partial, 1765 stats->nr_events[PERF_RECORD_AUX], 1766 vmm_exclusive ? 1767 "\nReloading kvm_intel module with vmm_exclusive=0\n" 1768 "will reduce the gaps to only guest's timeslices." : 1769 ""); 1770 } 1771 1772 if (stats->nr_unknown_events != 0) { 1773 ui__warning("Found %u unknown events!\n\n" 1774 "Is this an older tool processing a perf.data " 1775 "file generated by a more recent tool?\n\n" 1776 "If that is not the case, consider " 1777 "reporting to linux-kernel@vger.kernel.org.\n\n", 1778 stats->nr_unknown_events); 1779 } 1780 1781 if (stats->nr_unknown_id != 0) { 1782 ui__warning("%u samples with id not present in the header\n", 1783 stats->nr_unknown_id); 1784 } 1785 1786 if (stats->nr_invalid_chains != 0) { 1787 ui__warning("Found invalid callchains!\n\n" 1788 "%u out of %u events were discarded for this reason.\n\n" 1789 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1790 stats->nr_invalid_chains, 1791 stats->nr_events[PERF_RECORD_SAMPLE]); 1792 } 1793 1794 if (stats->nr_unprocessable_samples != 0) { 1795 ui__warning("%u unprocessable samples recorded.\n" 1796 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1797 stats->nr_unprocessable_samples); 1798 } 1799 1800 perf_session__warn_order(session); 1801 1802 events_stats__auxtrace_error_warn(stats); 1803 1804 if (stats->nr_proc_map_timeout != 0) { 1805 ui__warning("%d map information files for pre-existing threads were\n" 1806 "not processed, if there are samples for addresses they\n" 1807 "will not be resolved, you may find out which are these\n" 1808 "threads by running with -v and redirecting the output\n" 1809 "to a file.\n" 1810 "The time limit to process proc map is too short?\n" 1811 "Increase it by --proc-map-timeout\n", 1812 stats->nr_proc_map_timeout); 1813 } 1814 } 1815 1816 static int perf_session__flush_thread_stack(struct thread *thread, 1817 void *p __maybe_unused) 1818 { 1819 return thread_stack__flush(thread); 1820 } 1821 1822 static int perf_session__flush_thread_stacks(struct perf_session *session) 1823 { 1824 return machines__for_each_thread(&session->machines, 1825 perf_session__flush_thread_stack, 1826 NULL); 1827 } 1828 1829 volatile int session_done; 1830 1831 static int __perf_session__process_decomp_events(struct perf_session *session); 1832 1833 static int __perf_session__process_pipe_events(struct perf_session *session) 1834 { 1835 struct ordered_events *oe = &session->ordered_events; 1836 struct perf_tool *tool = session->tool; 1837 int fd = perf_data__fd(session->data); 1838 union perf_event *event; 1839 uint32_t size, cur_size = 0; 1840 void *buf = NULL; 1841 s64 skip = 0; 1842 u64 head; 1843 ssize_t err; 1844 void *p; 1845 1846 perf_tool__fill_defaults(tool); 1847 1848 head = 0; 1849 cur_size = sizeof(union perf_event); 1850 1851 buf = malloc(cur_size); 1852 if (!buf) 1853 return -errno; 1854 ordered_events__set_copy_on_queue(oe, true); 1855 more: 1856 event = buf; 1857 err = readn(fd, event, sizeof(struct perf_event_header)); 1858 if (err <= 0) { 1859 if (err == 0) 1860 goto done; 1861 1862 pr_err("failed to read event header\n"); 1863 goto out_err; 1864 } 1865 1866 if (session->header.needs_swap) 1867 perf_event_header__bswap(&event->header); 1868 1869 size = event->header.size; 1870 if (size < sizeof(struct perf_event_header)) { 1871 pr_err("bad event header size\n"); 1872 goto out_err; 1873 } 1874 1875 if (size > cur_size) { 1876 void *new = realloc(buf, size); 1877 if (!new) { 1878 pr_err("failed to allocate memory to read event\n"); 1879 goto out_err; 1880 } 1881 buf = new; 1882 cur_size = size; 1883 event = buf; 1884 } 1885 p = event; 1886 p += sizeof(struct perf_event_header); 1887 1888 if (size - sizeof(struct perf_event_header)) { 1889 err = readn(fd, p, size - sizeof(struct perf_event_header)); 1890 if (err <= 0) { 1891 if (err == 0) { 1892 pr_err("unexpected end of event stream\n"); 1893 goto done; 1894 } 1895 1896 pr_err("failed to read event data\n"); 1897 goto out_err; 1898 } 1899 } 1900 1901 if ((skip = perf_session__process_event(session, event, head)) < 0) { 1902 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1903 head, event->header.size, event->header.type); 1904 err = -EINVAL; 1905 goto out_err; 1906 } 1907 1908 head += size; 1909 1910 if (skip > 0) 1911 head += skip; 1912 1913 err = __perf_session__process_decomp_events(session); 1914 if (err) 1915 goto out_err; 1916 1917 if (!session_done()) 1918 goto more; 1919 done: 1920 /* do the final flush for ordered samples */ 1921 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 1922 if (err) 1923 goto out_err; 1924 err = auxtrace__flush_events(session, tool); 1925 if (err) 1926 goto out_err; 1927 err = perf_session__flush_thread_stacks(session); 1928 out_err: 1929 free(buf); 1930 if (!tool->no_warn) 1931 perf_session__warn_about_errors(session); 1932 ordered_events__free(&session->ordered_events); 1933 auxtrace__free_events(session); 1934 return err; 1935 } 1936 1937 static union perf_event * 1938 fetch_mmaped_event(struct perf_session *session, 1939 u64 head, size_t mmap_size, char *buf) 1940 { 1941 union perf_event *event; 1942 1943 /* 1944 * Ensure we have enough space remaining to read 1945 * the size of the event in the headers. 1946 */ 1947 if (head + sizeof(event->header) > mmap_size) 1948 return NULL; 1949 1950 event = (union perf_event *)(buf + head); 1951 1952 if (session->header.needs_swap) 1953 perf_event_header__bswap(&event->header); 1954 1955 if (head + event->header.size > mmap_size) { 1956 /* We're not fetching the event so swap back again */ 1957 if (session->header.needs_swap) 1958 perf_event_header__bswap(&event->header); 1959 pr_debug("%s: head=%#" PRIx64 " event->header_size=%#x, mmap_size=%#zx: fuzzed perf.data?\n", 1960 __func__, head, event->header.size, mmap_size); 1961 return ERR_PTR(-EINVAL); 1962 } 1963 1964 return event; 1965 } 1966 1967 static int __perf_session__process_decomp_events(struct perf_session *session) 1968 { 1969 s64 skip; 1970 u64 size, file_pos = 0; 1971 struct decomp *decomp = session->decomp_last; 1972 1973 if (!decomp) 1974 return 0; 1975 1976 while (decomp->head < decomp->size && !session_done()) { 1977 union perf_event *event = fetch_mmaped_event(session, decomp->head, decomp->size, decomp->data); 1978 1979 if (IS_ERR(event)) 1980 return PTR_ERR(event); 1981 1982 if (!event) 1983 break; 1984 1985 size = event->header.size; 1986 1987 if (size < sizeof(struct perf_event_header) || 1988 (skip = perf_session__process_event(session, event, file_pos)) < 0) { 1989 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1990 decomp->file_pos + decomp->head, event->header.size, event->header.type); 1991 return -EINVAL; 1992 } 1993 1994 if (skip) 1995 size += skip; 1996 1997 decomp->head += size; 1998 } 1999 2000 return 0; 2001 } 2002 2003 /* 2004 * On 64bit we can mmap the data file in one go. No need for tiny mmap 2005 * slices. On 32bit we use 32MB. 2006 */ 2007 #if BITS_PER_LONG == 64 2008 #define MMAP_SIZE ULLONG_MAX 2009 #define NUM_MMAPS 1 2010 #else 2011 #define MMAP_SIZE (32 * 1024 * 1024ULL) 2012 #define NUM_MMAPS 128 2013 #endif 2014 2015 struct reader; 2016 2017 typedef s64 (*reader_cb_t)(struct perf_session *session, 2018 union perf_event *event, 2019 u64 file_offset); 2020 2021 struct reader { 2022 int fd; 2023 u64 data_size; 2024 u64 data_offset; 2025 reader_cb_t process; 2026 }; 2027 2028 static int 2029 reader__process_events(struct reader *rd, struct perf_session *session, 2030 struct ui_progress *prog) 2031 { 2032 u64 data_size = rd->data_size; 2033 u64 head, page_offset, file_offset, file_pos, size; 2034 int err = 0, mmap_prot, mmap_flags, map_idx = 0; 2035 size_t mmap_size; 2036 char *buf, *mmaps[NUM_MMAPS]; 2037 union perf_event *event; 2038 s64 skip; 2039 2040 page_offset = page_size * (rd->data_offset / page_size); 2041 file_offset = page_offset; 2042 head = rd->data_offset - page_offset; 2043 2044 ui_progress__init_size(prog, data_size, "Processing events..."); 2045 2046 data_size += rd->data_offset; 2047 2048 mmap_size = MMAP_SIZE; 2049 if (mmap_size > data_size) { 2050 mmap_size = data_size; 2051 session->one_mmap = true; 2052 } 2053 2054 memset(mmaps, 0, sizeof(mmaps)); 2055 2056 mmap_prot = PROT_READ; 2057 mmap_flags = MAP_SHARED; 2058 2059 if (session->header.needs_swap) { 2060 mmap_prot |= PROT_WRITE; 2061 mmap_flags = MAP_PRIVATE; 2062 } 2063 remap: 2064 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, rd->fd, 2065 file_offset); 2066 if (buf == MAP_FAILED) { 2067 pr_err("failed to mmap file\n"); 2068 err = -errno; 2069 goto out; 2070 } 2071 mmaps[map_idx] = buf; 2072 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 2073 file_pos = file_offset + head; 2074 if (session->one_mmap) { 2075 session->one_mmap_addr = buf; 2076 session->one_mmap_offset = file_offset; 2077 } 2078 2079 more: 2080 event = fetch_mmaped_event(session, head, mmap_size, buf); 2081 if (IS_ERR(event)) 2082 return PTR_ERR(event); 2083 2084 if (!event) { 2085 if (mmaps[map_idx]) { 2086 munmap(mmaps[map_idx], mmap_size); 2087 mmaps[map_idx] = NULL; 2088 } 2089 2090 page_offset = page_size * (head / page_size); 2091 file_offset += page_offset; 2092 head -= page_offset; 2093 goto remap; 2094 } 2095 2096 size = event->header.size; 2097 2098 skip = -EINVAL; 2099 2100 if (size < sizeof(struct perf_event_header) || 2101 (skip = rd->process(session, event, file_pos)) < 0) { 2102 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n", 2103 file_offset + head, event->header.size, 2104 event->header.type, strerror(-skip)); 2105 err = skip; 2106 goto out; 2107 } 2108 2109 if (skip) 2110 size += skip; 2111 2112 head += size; 2113 file_pos += size; 2114 2115 err = __perf_session__process_decomp_events(session); 2116 if (err) 2117 goto out; 2118 2119 ui_progress__update(prog, size); 2120 2121 if (session_done()) 2122 goto out; 2123 2124 if (file_pos < data_size) 2125 goto more; 2126 2127 out: 2128 return err; 2129 } 2130 2131 static s64 process_simple(struct perf_session *session, 2132 union perf_event *event, 2133 u64 file_offset) 2134 { 2135 return perf_session__process_event(session, event, file_offset); 2136 } 2137 2138 static int __perf_session__process_events(struct perf_session *session) 2139 { 2140 struct reader rd = { 2141 .fd = perf_data__fd(session->data), 2142 .data_size = session->header.data_size, 2143 .data_offset = session->header.data_offset, 2144 .process = process_simple, 2145 }; 2146 struct ordered_events *oe = &session->ordered_events; 2147 struct perf_tool *tool = session->tool; 2148 struct ui_progress prog; 2149 int err; 2150 2151 perf_tool__fill_defaults(tool); 2152 2153 if (rd.data_size == 0) 2154 return -1; 2155 2156 ui_progress__init_size(&prog, rd.data_size, "Processing events..."); 2157 2158 err = reader__process_events(&rd, session, &prog); 2159 if (err) 2160 goto out_err; 2161 /* do the final flush for ordered samples */ 2162 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 2163 if (err) 2164 goto out_err; 2165 err = auxtrace__flush_events(session, tool); 2166 if (err) 2167 goto out_err; 2168 err = perf_session__flush_thread_stacks(session); 2169 out_err: 2170 ui_progress__finish(); 2171 if (!tool->no_warn) 2172 perf_session__warn_about_errors(session); 2173 /* 2174 * We may switching perf.data output, make ordered_events 2175 * reusable. 2176 */ 2177 ordered_events__reinit(&session->ordered_events); 2178 auxtrace__free_events(session); 2179 session->one_mmap = false; 2180 return err; 2181 } 2182 2183 int perf_session__process_events(struct perf_session *session) 2184 { 2185 if (perf_session__register_idle_thread(session) < 0) 2186 return -ENOMEM; 2187 2188 if (perf_data__is_pipe(session->data)) 2189 return __perf_session__process_pipe_events(session); 2190 2191 return __perf_session__process_events(session); 2192 } 2193 2194 bool perf_session__has_traces(struct perf_session *session, const char *msg) 2195 { 2196 struct evsel *evsel; 2197 2198 evlist__for_each_entry(session->evlist, evsel) { 2199 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) 2200 return true; 2201 } 2202 2203 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 2204 return false; 2205 } 2206 2207 int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr) 2208 { 2209 char *bracket; 2210 struct ref_reloc_sym *ref; 2211 struct kmap *kmap; 2212 2213 ref = zalloc(sizeof(struct ref_reloc_sym)); 2214 if (ref == NULL) 2215 return -ENOMEM; 2216 2217 ref->name = strdup(symbol_name); 2218 if (ref->name == NULL) { 2219 free(ref); 2220 return -ENOMEM; 2221 } 2222 2223 bracket = strchr(ref->name, ']'); 2224 if (bracket) 2225 *bracket = '\0'; 2226 2227 ref->addr = addr; 2228 2229 kmap = map__kmap(map); 2230 if (kmap) 2231 kmap->ref_reloc_sym = ref; 2232 2233 return 0; 2234 } 2235 2236 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp) 2237 { 2238 return machines__fprintf_dsos(&session->machines, fp); 2239 } 2240 2241 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp, 2242 bool (skip)(struct dso *dso, int parm), int parm) 2243 { 2244 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm); 2245 } 2246 2247 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 2248 { 2249 size_t ret; 2250 const char *msg = ""; 2251 2252 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE)) 2253 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)"; 2254 2255 ret = fprintf(fp, "\nAggregated stats:%s\n", msg); 2256 2257 ret += events_stats__fprintf(&session->evlist->stats, fp); 2258 return ret; 2259 } 2260 2261 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 2262 { 2263 /* 2264 * FIXME: Here we have to actually print all the machines in this 2265 * session, not just the host... 2266 */ 2267 return machine__fprintf(&session->machines.host, fp); 2268 } 2269 2270 struct evsel *perf_session__find_first_evtype(struct perf_session *session, 2271 unsigned int type) 2272 { 2273 struct evsel *pos; 2274 2275 evlist__for_each_entry(session->evlist, pos) { 2276 if (pos->core.attr.type == type) 2277 return pos; 2278 } 2279 return NULL; 2280 } 2281 2282 int perf_session__cpu_bitmap(struct perf_session *session, 2283 const char *cpu_list, unsigned long *cpu_bitmap) 2284 { 2285 int i, err = -1; 2286 struct perf_cpu_map *map; 2287 2288 for (i = 0; i < PERF_TYPE_MAX; ++i) { 2289 struct evsel *evsel; 2290 2291 evsel = perf_session__find_first_evtype(session, i); 2292 if (!evsel) 2293 continue; 2294 2295 if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CPU)) { 2296 pr_err("File does not contain CPU events. " 2297 "Remove -C option to proceed.\n"); 2298 return -1; 2299 } 2300 } 2301 2302 map = perf_cpu_map__new(cpu_list); 2303 if (map == NULL) { 2304 pr_err("Invalid cpu_list\n"); 2305 return -1; 2306 } 2307 2308 for (i = 0; i < map->nr; i++) { 2309 int cpu = map->map[i]; 2310 2311 if (cpu >= MAX_NR_CPUS) { 2312 pr_err("Requested CPU %d too large. " 2313 "Consider raising MAX_NR_CPUS\n", cpu); 2314 goto out_delete_map; 2315 } 2316 2317 set_bit(cpu, cpu_bitmap); 2318 } 2319 2320 err = 0; 2321 2322 out_delete_map: 2323 perf_cpu_map__put(map); 2324 return err; 2325 } 2326 2327 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 2328 bool full) 2329 { 2330 if (session == NULL || fp == NULL) 2331 return; 2332 2333 fprintf(fp, "# ========\n"); 2334 perf_header__fprintf_info(session, fp, full); 2335 fprintf(fp, "# ========\n#\n"); 2336 } 2337 2338 2339 int __perf_session__set_tracepoints_handlers(struct perf_session *session, 2340 const struct evsel_str_handler *assocs, 2341 size_t nr_assocs) 2342 { 2343 struct evsel *evsel; 2344 size_t i; 2345 int err; 2346 2347 for (i = 0; i < nr_assocs; i++) { 2348 /* 2349 * Adding a handler for an event not in the session, 2350 * just ignore it. 2351 */ 2352 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name); 2353 if (evsel == NULL) 2354 continue; 2355 2356 err = -EEXIST; 2357 if (evsel->handler != NULL) 2358 goto out; 2359 evsel->handler = assocs[i].handler; 2360 } 2361 2362 err = 0; 2363 out: 2364 return err; 2365 } 2366 2367 int perf_event__process_id_index(struct perf_session *session, 2368 union perf_event *event) 2369 { 2370 struct evlist *evlist = session->evlist; 2371 struct id_index_event *ie = &event->id_index; 2372 size_t i, nr, max_nr; 2373 2374 max_nr = (ie->header.size - sizeof(struct id_index_event)) / 2375 sizeof(struct id_index_entry); 2376 nr = ie->nr; 2377 if (nr > max_nr) 2378 return -EINVAL; 2379 2380 if (dump_trace) 2381 fprintf(stdout, " nr: %zu\n", nr); 2382 2383 for (i = 0; i < nr; i++) { 2384 struct id_index_entry *e = &ie->entries[i]; 2385 struct perf_sample_id *sid; 2386 2387 if (dump_trace) { 2388 fprintf(stdout, " ... id: %"PRIu64, e->id); 2389 fprintf(stdout, " idx: %"PRIu64, e->idx); 2390 fprintf(stdout, " cpu: %"PRId64, e->cpu); 2391 fprintf(stdout, " tid: %"PRId64"\n", e->tid); 2392 } 2393 2394 sid = perf_evlist__id2sid(evlist, e->id); 2395 if (!sid) 2396 return -ENOENT; 2397 sid->idx = e->idx; 2398 sid->cpu = e->cpu; 2399 sid->tid = e->tid; 2400 } 2401 return 0; 2402 } 2403 2404 int perf_event__synthesize_id_index(struct perf_tool *tool, 2405 perf_event__handler_t process, 2406 struct evlist *evlist, 2407 struct machine *machine) 2408 { 2409 union perf_event *ev; 2410 struct evsel *evsel; 2411 size_t nr = 0, i = 0, sz, max_nr, n; 2412 int err; 2413 2414 pr_debug2("Synthesizing id index\n"); 2415 2416 max_nr = (UINT16_MAX - sizeof(struct id_index_event)) / 2417 sizeof(struct id_index_entry); 2418 2419 evlist__for_each_entry(evlist, evsel) 2420 nr += evsel->ids; 2421 2422 n = nr > max_nr ? max_nr : nr; 2423 sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry); 2424 ev = zalloc(sz); 2425 if (!ev) 2426 return -ENOMEM; 2427 2428 ev->id_index.header.type = PERF_RECORD_ID_INDEX; 2429 ev->id_index.header.size = sz; 2430 ev->id_index.nr = n; 2431 2432 evlist__for_each_entry(evlist, evsel) { 2433 u32 j; 2434 2435 for (j = 0; j < evsel->ids; j++) { 2436 struct id_index_entry *e; 2437 struct perf_sample_id *sid; 2438 2439 if (i >= n) { 2440 err = process(tool, ev, NULL, machine); 2441 if (err) 2442 goto out_err; 2443 nr -= n; 2444 i = 0; 2445 } 2446 2447 e = &ev->id_index.entries[i++]; 2448 2449 e->id = evsel->id[j]; 2450 2451 sid = perf_evlist__id2sid(evlist, e->id); 2452 if (!sid) { 2453 free(ev); 2454 return -ENOENT; 2455 } 2456 2457 e->idx = sid->idx; 2458 e->cpu = sid->cpu; 2459 e->tid = sid->tid; 2460 } 2461 } 2462 2463 sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry); 2464 ev->id_index.header.size = sz; 2465 ev->id_index.nr = nr; 2466 2467 err = process(tool, ev, NULL, machine); 2468 out_err: 2469 free(ev); 2470 2471 return err; 2472 } 2473