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 "evlist.h" 16 #include "evsel.h" 17 #include "memswap.h" 18 #include "map.h" 19 #include "symbol.h" 20 #include "session.h" 21 #include "tool.h" 22 #include "sort.h" 23 #include "cpumap.h" 24 #include "perf_regs.h" 25 #include "asm/bug.h" 26 #include "auxtrace.h" 27 #include "thread.h" 28 #include "thread-stack.h" 29 #include "sample-raw.h" 30 #include "stat.h" 31 #include "util.h" 32 #include "../perf.h" 33 #include "arch/common.h" 34 35 #ifdef HAVE_ZSTD_SUPPORT 36 static int perf_session__process_compressed_event(struct perf_session *session, 37 union perf_event *event, u64 file_offset) 38 { 39 void *src; 40 size_t decomp_size, src_size; 41 u64 decomp_last_rem = 0; 42 size_t mmap_len, decomp_len = session->header.env.comp_mmap_len; 43 struct decomp *decomp, *decomp_last = session->decomp_last; 44 45 if (decomp_last) { 46 decomp_last_rem = decomp_last->size - decomp_last->head; 47 decomp_len += decomp_last_rem; 48 } 49 50 mmap_len = sizeof(struct decomp) + decomp_len; 51 decomp = mmap(NULL, mmap_len, PROT_READ|PROT_WRITE, 52 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); 53 if (decomp == MAP_FAILED) { 54 pr_err("Couldn't allocate memory for decompression\n"); 55 return -1; 56 } 57 58 decomp->file_pos = file_offset; 59 decomp->mmap_len = mmap_len; 60 decomp->head = 0; 61 62 if (decomp_last_rem) { 63 memcpy(decomp->data, &(decomp_last->data[decomp_last->head]), decomp_last_rem); 64 decomp->size = decomp_last_rem; 65 } 66 67 src = (void *)event + sizeof(struct perf_record_compressed); 68 src_size = event->pack.header.size - sizeof(struct perf_record_compressed); 69 70 decomp_size = zstd_decompress_stream(&(session->zstd_data), src, src_size, 71 &(decomp->data[decomp_last_rem]), decomp_len - decomp_last_rem); 72 if (!decomp_size) { 73 munmap(decomp, mmap_len); 74 pr_err("Couldn't decompress data\n"); 75 return -1; 76 } 77 78 decomp->size += decomp_size; 79 80 if (session->decomp == NULL) { 81 session->decomp = decomp; 82 session->decomp_last = decomp; 83 } else { 84 session->decomp_last->next = decomp; 85 session->decomp_last = decomp; 86 } 87 88 pr_debug("decomp (B): %ld to %ld\n", src_size, decomp_size); 89 90 return 0; 91 } 92 #else /* !HAVE_ZSTD_SUPPORT */ 93 #define perf_session__process_compressed_event perf_session__process_compressed_event_stub 94 #endif 95 96 static int perf_session__deliver_event(struct perf_session *session, 97 union perf_event *event, 98 struct perf_tool *tool, 99 u64 file_offset); 100 101 static int perf_session__open(struct perf_session *session) 102 { 103 struct perf_data *data = session->data; 104 105 if (perf_session__read_header(session) < 0) { 106 pr_err("incompatible file format (rerun with -v to learn more)\n"); 107 return -1; 108 } 109 110 if (perf_data__is_pipe(data)) 111 return 0; 112 113 if (perf_header__has_feat(&session->header, HEADER_STAT)) 114 return 0; 115 116 if (!perf_evlist__valid_sample_type(session->evlist)) { 117 pr_err("non matching sample_type\n"); 118 return -1; 119 } 120 121 if (!perf_evlist__valid_sample_id_all(session->evlist)) { 122 pr_err("non matching sample_id_all\n"); 123 return -1; 124 } 125 126 if (!perf_evlist__valid_read_format(session->evlist)) { 127 pr_err("non matching read_format\n"); 128 return -1; 129 } 130 131 return 0; 132 } 133 134 void perf_session__set_id_hdr_size(struct perf_session *session) 135 { 136 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist); 137 138 machines__set_id_hdr_size(&session->machines, id_hdr_size); 139 } 140 141 int perf_session__create_kernel_maps(struct perf_session *session) 142 { 143 int ret = machine__create_kernel_maps(&session->machines.host); 144 145 if (ret >= 0) 146 ret = machines__create_guest_kernel_maps(&session->machines); 147 return ret; 148 } 149 150 static void perf_session__destroy_kernel_maps(struct perf_session *session) 151 { 152 machines__destroy_kernel_maps(&session->machines); 153 } 154 155 static bool perf_session__has_comm_exec(struct perf_session *session) 156 { 157 struct evsel *evsel; 158 159 evlist__for_each_entry(session->evlist, evsel) { 160 if (evsel->core.attr.comm_exec) 161 return true; 162 } 163 164 return false; 165 } 166 167 static void perf_session__set_comm_exec(struct perf_session *session) 168 { 169 bool comm_exec = perf_session__has_comm_exec(session); 170 171 machines__set_comm_exec(&session->machines, comm_exec); 172 } 173 174 static int ordered_events__deliver_event(struct ordered_events *oe, 175 struct ordered_event *event) 176 { 177 struct perf_session *session = container_of(oe, struct perf_session, 178 ordered_events); 179 180 return perf_session__deliver_event(session, event->event, 181 session->tool, event->file_offset); 182 } 183 184 struct perf_session *perf_session__new(struct perf_data *data, 185 bool repipe, struct perf_tool *tool) 186 { 187 struct perf_session *session = zalloc(sizeof(*session)); 188 189 if (!session) 190 goto out; 191 192 session->repipe = repipe; 193 session->tool = tool; 194 INIT_LIST_HEAD(&session->auxtrace_index); 195 machines__init(&session->machines); 196 ordered_events__init(&session->ordered_events, 197 ordered_events__deliver_event, NULL); 198 199 perf_env__init(&session->header.env); 200 if (data) { 201 if (perf_data__open(data)) 202 goto out_delete; 203 204 session->data = data; 205 206 if (perf_data__is_read(data)) { 207 if (perf_session__open(session) < 0) 208 goto out_delete; 209 210 /* 211 * set session attributes that are present in perf.data 212 * but not in pipe-mode. 213 */ 214 if (!data->is_pipe) { 215 perf_session__set_id_hdr_size(session); 216 perf_session__set_comm_exec(session); 217 } 218 219 perf_evlist__init_trace_event_sample_raw(session->evlist); 220 221 /* Open the directory data. */ 222 if (data->is_dir && perf_data__open_dir(data)) 223 goto out_delete; 224 } 225 } else { 226 session->machines.host.env = &perf_env; 227 } 228 229 session->machines.host.single_address_space = 230 perf_env__single_address_space(session->machines.host.env); 231 232 if (!data || perf_data__is_write(data)) { 233 /* 234 * In O_RDONLY mode this will be performed when reading the 235 * kernel MMAP event, in perf_event__process_mmap(). 236 */ 237 if (perf_session__create_kernel_maps(session) < 0) 238 pr_warning("Cannot read kernel map\n"); 239 } 240 241 /* 242 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is 243 * processed, so perf_evlist__sample_id_all is not meaningful here. 244 */ 245 if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps && 246 tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) { 247 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); 248 tool->ordered_events = false; 249 } 250 251 return session; 252 253 out_delete: 254 perf_session__delete(session); 255 out: 256 return NULL; 257 } 258 259 static void perf_session__delete_threads(struct perf_session *session) 260 { 261 machine__delete_threads(&session->machines.host); 262 } 263 264 static void perf_session__release_decomp_events(struct perf_session *session) 265 { 266 struct decomp *next, *decomp; 267 size_t mmap_len; 268 next = session->decomp; 269 do { 270 decomp = next; 271 if (decomp == NULL) 272 break; 273 next = decomp->next; 274 mmap_len = decomp->mmap_len; 275 munmap(decomp, mmap_len); 276 } while (1); 277 } 278 279 void perf_session__delete(struct perf_session *session) 280 { 281 if (session == NULL) 282 return; 283 auxtrace__free(session); 284 auxtrace_index__free(&session->auxtrace_index); 285 perf_session__destroy_kernel_maps(session); 286 perf_session__delete_threads(session); 287 perf_session__release_decomp_events(session); 288 perf_env__exit(&session->header.env); 289 machines__exit(&session->machines); 290 if (session->data) 291 perf_data__close(session->data); 292 free(session); 293 } 294 295 static int process_event_synth_tracing_data_stub(struct perf_session *session 296 __maybe_unused, 297 union perf_event *event 298 __maybe_unused) 299 { 300 dump_printf(": unhandled!\n"); 301 return 0; 302 } 303 304 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused, 305 union perf_event *event __maybe_unused, 306 struct evlist **pevlist 307 __maybe_unused) 308 { 309 dump_printf(": unhandled!\n"); 310 return 0; 311 } 312 313 static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused, 314 union perf_event *event __maybe_unused, 315 struct evlist **pevlist 316 __maybe_unused) 317 { 318 if (dump_trace) 319 perf_event__fprintf_event_update(event, stdout); 320 321 dump_printf(": unhandled!\n"); 322 return 0; 323 } 324 325 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused, 326 union perf_event *event __maybe_unused, 327 struct perf_sample *sample __maybe_unused, 328 struct evsel *evsel __maybe_unused, 329 struct machine *machine __maybe_unused) 330 { 331 dump_printf(": unhandled!\n"); 332 return 0; 333 } 334 335 static int process_event_stub(struct perf_tool *tool __maybe_unused, 336 union perf_event *event __maybe_unused, 337 struct perf_sample *sample __maybe_unused, 338 struct machine *machine __maybe_unused) 339 { 340 dump_printf(": unhandled!\n"); 341 return 0; 342 } 343 344 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused, 345 union perf_event *event __maybe_unused, 346 struct ordered_events *oe __maybe_unused) 347 { 348 dump_printf(": unhandled!\n"); 349 return 0; 350 } 351 352 static int process_finished_round(struct perf_tool *tool, 353 union perf_event *event, 354 struct ordered_events *oe); 355 356 static int skipn(int fd, off_t n) 357 { 358 char buf[4096]; 359 ssize_t ret; 360 361 while (n > 0) { 362 ret = read(fd, buf, min(n, (off_t)sizeof(buf))); 363 if (ret <= 0) 364 return ret; 365 n -= ret; 366 } 367 368 return 0; 369 } 370 371 static s64 process_event_auxtrace_stub(struct perf_session *session __maybe_unused, 372 union perf_event *event) 373 { 374 dump_printf(": unhandled!\n"); 375 if (perf_data__is_pipe(session->data)) 376 skipn(perf_data__fd(session->data), event->auxtrace.size); 377 return event->auxtrace.size; 378 } 379 380 static int process_event_op2_stub(struct perf_session *session __maybe_unused, 381 union perf_event *event __maybe_unused) 382 { 383 dump_printf(": unhandled!\n"); 384 return 0; 385 } 386 387 388 static 389 int process_event_thread_map_stub(struct perf_session *session __maybe_unused, 390 union perf_event *event __maybe_unused) 391 { 392 if (dump_trace) 393 perf_event__fprintf_thread_map(event, stdout); 394 395 dump_printf(": unhandled!\n"); 396 return 0; 397 } 398 399 static 400 int process_event_cpu_map_stub(struct perf_session *session __maybe_unused, 401 union perf_event *event __maybe_unused) 402 { 403 if (dump_trace) 404 perf_event__fprintf_cpu_map(event, stdout); 405 406 dump_printf(": unhandled!\n"); 407 return 0; 408 } 409 410 static 411 int process_event_stat_config_stub(struct perf_session *session __maybe_unused, 412 union perf_event *event __maybe_unused) 413 { 414 if (dump_trace) 415 perf_event__fprintf_stat_config(event, stdout); 416 417 dump_printf(": unhandled!\n"); 418 return 0; 419 } 420 421 static int process_stat_stub(struct perf_session *perf_session __maybe_unused, 422 union perf_event *event) 423 { 424 if (dump_trace) 425 perf_event__fprintf_stat(event, stdout); 426 427 dump_printf(": unhandled!\n"); 428 return 0; 429 } 430 431 static int process_stat_round_stub(struct perf_session *perf_session __maybe_unused, 432 union perf_event *event) 433 { 434 if (dump_trace) 435 perf_event__fprintf_stat_round(event, stdout); 436 437 dump_printf(": unhandled!\n"); 438 return 0; 439 } 440 441 static int perf_session__process_compressed_event_stub(struct perf_session *session __maybe_unused, 442 union perf_event *event __maybe_unused, 443 u64 file_offset __maybe_unused) 444 { 445 dump_printf(": unhandled!\n"); 446 return 0; 447 } 448 449 void perf_tool__fill_defaults(struct perf_tool *tool) 450 { 451 if (tool->sample == NULL) 452 tool->sample = process_event_sample_stub; 453 if (tool->mmap == NULL) 454 tool->mmap = process_event_stub; 455 if (tool->mmap2 == NULL) 456 tool->mmap2 = process_event_stub; 457 if (tool->comm == NULL) 458 tool->comm = process_event_stub; 459 if (tool->namespaces == NULL) 460 tool->namespaces = process_event_stub; 461 if (tool->fork == NULL) 462 tool->fork = process_event_stub; 463 if (tool->exit == NULL) 464 tool->exit = process_event_stub; 465 if (tool->lost == NULL) 466 tool->lost = perf_event__process_lost; 467 if (tool->lost_samples == NULL) 468 tool->lost_samples = perf_event__process_lost_samples; 469 if (tool->aux == NULL) 470 tool->aux = perf_event__process_aux; 471 if (tool->itrace_start == NULL) 472 tool->itrace_start = perf_event__process_itrace_start; 473 if (tool->context_switch == NULL) 474 tool->context_switch = perf_event__process_switch; 475 if (tool->ksymbol == NULL) 476 tool->ksymbol = perf_event__process_ksymbol; 477 if (tool->bpf == NULL) 478 tool->bpf = perf_event__process_bpf; 479 if (tool->read == NULL) 480 tool->read = process_event_sample_stub; 481 if (tool->throttle == NULL) 482 tool->throttle = process_event_stub; 483 if (tool->unthrottle == NULL) 484 tool->unthrottle = process_event_stub; 485 if (tool->attr == NULL) 486 tool->attr = process_event_synth_attr_stub; 487 if (tool->event_update == NULL) 488 tool->event_update = process_event_synth_event_update_stub; 489 if (tool->tracing_data == NULL) 490 tool->tracing_data = process_event_synth_tracing_data_stub; 491 if (tool->build_id == NULL) 492 tool->build_id = process_event_op2_stub; 493 if (tool->finished_round == NULL) { 494 if (tool->ordered_events) 495 tool->finished_round = process_finished_round; 496 else 497 tool->finished_round = process_finished_round_stub; 498 } 499 if (tool->id_index == NULL) 500 tool->id_index = process_event_op2_stub; 501 if (tool->auxtrace_info == NULL) 502 tool->auxtrace_info = process_event_op2_stub; 503 if (tool->auxtrace == NULL) 504 tool->auxtrace = process_event_auxtrace_stub; 505 if (tool->auxtrace_error == NULL) 506 tool->auxtrace_error = process_event_op2_stub; 507 if (tool->thread_map == NULL) 508 tool->thread_map = process_event_thread_map_stub; 509 if (tool->cpu_map == NULL) 510 tool->cpu_map = process_event_cpu_map_stub; 511 if (tool->stat_config == NULL) 512 tool->stat_config = process_event_stat_config_stub; 513 if (tool->stat == NULL) 514 tool->stat = process_stat_stub; 515 if (tool->stat_round == NULL) 516 tool->stat_round = process_stat_round_stub; 517 if (tool->time_conv == NULL) 518 tool->time_conv = process_event_op2_stub; 519 if (tool->feature == NULL) 520 tool->feature = process_event_op2_stub; 521 if (tool->compressed == NULL) 522 tool->compressed = perf_session__process_compressed_event; 523 } 524 525 static void swap_sample_id_all(union perf_event *event, void *data) 526 { 527 void *end = (void *) event + event->header.size; 528 int size = end - data; 529 530 BUG_ON(size % sizeof(u64)); 531 mem_bswap_64(data, size); 532 } 533 534 static void perf_event__all64_swap(union perf_event *event, 535 bool sample_id_all __maybe_unused) 536 { 537 struct perf_event_header *hdr = &event->header; 538 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 539 } 540 541 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 542 { 543 event->comm.pid = bswap_32(event->comm.pid); 544 event->comm.tid = bswap_32(event->comm.tid); 545 546 if (sample_id_all) { 547 void *data = &event->comm.comm; 548 549 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 550 swap_sample_id_all(event, data); 551 } 552 } 553 554 static void perf_event__mmap_swap(union perf_event *event, 555 bool sample_id_all) 556 { 557 event->mmap.pid = bswap_32(event->mmap.pid); 558 event->mmap.tid = bswap_32(event->mmap.tid); 559 event->mmap.start = bswap_64(event->mmap.start); 560 event->mmap.len = bswap_64(event->mmap.len); 561 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 562 563 if (sample_id_all) { 564 void *data = &event->mmap.filename; 565 566 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 567 swap_sample_id_all(event, data); 568 } 569 } 570 571 static void perf_event__mmap2_swap(union perf_event *event, 572 bool sample_id_all) 573 { 574 event->mmap2.pid = bswap_32(event->mmap2.pid); 575 event->mmap2.tid = bswap_32(event->mmap2.tid); 576 event->mmap2.start = bswap_64(event->mmap2.start); 577 event->mmap2.len = bswap_64(event->mmap2.len); 578 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); 579 event->mmap2.maj = bswap_32(event->mmap2.maj); 580 event->mmap2.min = bswap_32(event->mmap2.min); 581 event->mmap2.ino = bswap_64(event->mmap2.ino); 582 583 if (sample_id_all) { 584 void *data = &event->mmap2.filename; 585 586 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 587 swap_sample_id_all(event, data); 588 } 589 } 590 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 591 { 592 event->fork.pid = bswap_32(event->fork.pid); 593 event->fork.tid = bswap_32(event->fork.tid); 594 event->fork.ppid = bswap_32(event->fork.ppid); 595 event->fork.ptid = bswap_32(event->fork.ptid); 596 event->fork.time = bswap_64(event->fork.time); 597 598 if (sample_id_all) 599 swap_sample_id_all(event, &event->fork + 1); 600 } 601 602 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 603 { 604 event->read.pid = bswap_32(event->read.pid); 605 event->read.tid = bswap_32(event->read.tid); 606 event->read.value = bswap_64(event->read.value); 607 event->read.time_enabled = bswap_64(event->read.time_enabled); 608 event->read.time_running = bswap_64(event->read.time_running); 609 event->read.id = bswap_64(event->read.id); 610 611 if (sample_id_all) 612 swap_sample_id_all(event, &event->read + 1); 613 } 614 615 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all) 616 { 617 event->aux.aux_offset = bswap_64(event->aux.aux_offset); 618 event->aux.aux_size = bswap_64(event->aux.aux_size); 619 event->aux.flags = bswap_64(event->aux.flags); 620 621 if (sample_id_all) 622 swap_sample_id_all(event, &event->aux + 1); 623 } 624 625 static void perf_event__itrace_start_swap(union perf_event *event, 626 bool sample_id_all) 627 { 628 event->itrace_start.pid = bswap_32(event->itrace_start.pid); 629 event->itrace_start.tid = bswap_32(event->itrace_start.tid); 630 631 if (sample_id_all) 632 swap_sample_id_all(event, &event->itrace_start + 1); 633 } 634 635 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all) 636 { 637 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) { 638 event->context_switch.next_prev_pid = 639 bswap_32(event->context_switch.next_prev_pid); 640 event->context_switch.next_prev_tid = 641 bswap_32(event->context_switch.next_prev_tid); 642 } 643 644 if (sample_id_all) 645 swap_sample_id_all(event, &event->context_switch + 1); 646 } 647 648 static void perf_event__throttle_swap(union perf_event *event, 649 bool sample_id_all) 650 { 651 event->throttle.time = bswap_64(event->throttle.time); 652 event->throttle.id = bswap_64(event->throttle.id); 653 event->throttle.stream_id = bswap_64(event->throttle.stream_id); 654 655 if (sample_id_all) 656 swap_sample_id_all(event, &event->throttle + 1); 657 } 658 659 static void perf_event__namespaces_swap(union perf_event *event, 660 bool sample_id_all) 661 { 662 u64 i; 663 664 event->namespaces.pid = bswap_32(event->namespaces.pid); 665 event->namespaces.tid = bswap_32(event->namespaces.tid); 666 event->namespaces.nr_namespaces = bswap_64(event->namespaces.nr_namespaces); 667 668 for (i = 0; i < event->namespaces.nr_namespaces; i++) { 669 struct perf_ns_link_info *ns = &event->namespaces.link_info[i]; 670 671 ns->dev = bswap_64(ns->dev); 672 ns->ino = bswap_64(ns->ino); 673 } 674 675 if (sample_id_all) 676 swap_sample_id_all(event, &event->namespaces.link_info[i]); 677 } 678 679 static u8 revbyte(u8 b) 680 { 681 int rev = (b >> 4) | ((b & 0xf) << 4); 682 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 683 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 684 return (u8) rev; 685 } 686 687 /* 688 * XXX this is hack in attempt to carry flags bitfield 689 * through endian village. ABI says: 690 * 691 * Bit-fields are allocated from right to left (least to most significant) 692 * on little-endian implementations and from left to right (most to least 693 * significant) on big-endian implementations. 694 * 695 * The above seems to be byte specific, so we need to reverse each 696 * byte of the bitfield. 'Internet' also says this might be implementation 697 * specific and we probably need proper fix and carry perf_event_attr 698 * bitfield flags in separate data file FEAT_ section. Thought this seems 699 * to work for now. 700 */ 701 static void swap_bitfield(u8 *p, unsigned len) 702 { 703 unsigned i; 704 705 for (i = 0; i < len; i++) { 706 *p = revbyte(*p); 707 p++; 708 } 709 } 710 711 /* exported for swapping attributes in file header */ 712 void perf_event__attr_swap(struct perf_event_attr *attr) 713 { 714 attr->type = bswap_32(attr->type); 715 attr->size = bswap_32(attr->size); 716 717 #define bswap_safe(f, n) \ 718 (attr->size > (offsetof(struct perf_event_attr, f) + \ 719 sizeof(attr->f) * (n))) 720 #define bswap_field(f, sz) \ 721 do { \ 722 if (bswap_safe(f, 0)) \ 723 attr->f = bswap_##sz(attr->f); \ 724 } while(0) 725 #define bswap_field_16(f) bswap_field(f, 16) 726 #define bswap_field_32(f) bswap_field(f, 32) 727 #define bswap_field_64(f) bswap_field(f, 64) 728 729 bswap_field_64(config); 730 bswap_field_64(sample_period); 731 bswap_field_64(sample_type); 732 bswap_field_64(read_format); 733 bswap_field_32(wakeup_events); 734 bswap_field_32(bp_type); 735 bswap_field_64(bp_addr); 736 bswap_field_64(bp_len); 737 bswap_field_64(branch_sample_type); 738 bswap_field_64(sample_regs_user); 739 bswap_field_32(sample_stack_user); 740 bswap_field_32(aux_watermark); 741 bswap_field_16(sample_max_stack); 742 743 /* 744 * After read_format are bitfields. Check read_format because 745 * we are unable to use offsetof on bitfield. 746 */ 747 if (bswap_safe(read_format, 1)) 748 swap_bitfield((u8 *) (&attr->read_format + 1), 749 sizeof(u64)); 750 #undef bswap_field_64 751 #undef bswap_field_32 752 #undef bswap_field 753 #undef bswap_safe 754 } 755 756 static void perf_event__hdr_attr_swap(union perf_event *event, 757 bool sample_id_all __maybe_unused) 758 { 759 size_t size; 760 761 perf_event__attr_swap(&event->attr.attr); 762 763 size = event->header.size; 764 size -= (void *)&event->attr.id - (void *)event; 765 mem_bswap_64(event->attr.id, size); 766 } 767 768 static void perf_event__event_update_swap(union perf_event *event, 769 bool sample_id_all __maybe_unused) 770 { 771 event->event_update.type = bswap_64(event->event_update.type); 772 event->event_update.id = bswap_64(event->event_update.id); 773 } 774 775 static void perf_event__event_type_swap(union perf_event *event, 776 bool sample_id_all __maybe_unused) 777 { 778 event->event_type.event_type.event_id = 779 bswap_64(event->event_type.event_type.event_id); 780 } 781 782 static void perf_event__tracing_data_swap(union perf_event *event, 783 bool sample_id_all __maybe_unused) 784 { 785 event->tracing_data.size = bswap_32(event->tracing_data.size); 786 } 787 788 static void perf_event__auxtrace_info_swap(union perf_event *event, 789 bool sample_id_all __maybe_unused) 790 { 791 size_t size; 792 793 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type); 794 795 size = event->header.size; 796 size -= (void *)&event->auxtrace_info.priv - (void *)event; 797 mem_bswap_64(event->auxtrace_info.priv, size); 798 } 799 800 static void perf_event__auxtrace_swap(union perf_event *event, 801 bool sample_id_all __maybe_unused) 802 { 803 event->auxtrace.size = bswap_64(event->auxtrace.size); 804 event->auxtrace.offset = bswap_64(event->auxtrace.offset); 805 event->auxtrace.reference = bswap_64(event->auxtrace.reference); 806 event->auxtrace.idx = bswap_32(event->auxtrace.idx); 807 event->auxtrace.tid = bswap_32(event->auxtrace.tid); 808 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu); 809 } 810 811 static void perf_event__auxtrace_error_swap(union perf_event *event, 812 bool sample_id_all __maybe_unused) 813 { 814 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type); 815 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code); 816 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu); 817 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid); 818 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid); 819 event->auxtrace_error.fmt = bswap_32(event->auxtrace_error.fmt); 820 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip); 821 if (event->auxtrace_error.fmt) 822 event->auxtrace_error.time = bswap_64(event->auxtrace_error.time); 823 } 824 825 static void perf_event__thread_map_swap(union perf_event *event, 826 bool sample_id_all __maybe_unused) 827 { 828 unsigned i; 829 830 event->thread_map.nr = bswap_64(event->thread_map.nr); 831 832 for (i = 0; i < event->thread_map.nr; i++) 833 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid); 834 } 835 836 static void perf_event__cpu_map_swap(union perf_event *event, 837 bool sample_id_all __maybe_unused) 838 { 839 struct perf_record_cpu_map_data *data = &event->cpu_map.data; 840 struct cpu_map_entries *cpus; 841 struct perf_record_record_cpu_map *mask; 842 unsigned i; 843 844 data->type = bswap_64(data->type); 845 846 switch (data->type) { 847 case PERF_CPU_MAP__CPUS: 848 cpus = (struct cpu_map_entries *)data->data; 849 850 cpus->nr = bswap_16(cpus->nr); 851 852 for (i = 0; i < cpus->nr; i++) 853 cpus->cpu[i] = bswap_16(cpus->cpu[i]); 854 break; 855 case PERF_CPU_MAP__MASK: 856 mask = (struct perf_record_record_cpu_map *)data->data; 857 858 mask->nr = bswap_16(mask->nr); 859 mask->long_size = bswap_16(mask->long_size); 860 861 switch (mask->long_size) { 862 case 4: mem_bswap_32(&mask->mask, mask->nr); break; 863 case 8: mem_bswap_64(&mask->mask, mask->nr); break; 864 default: 865 pr_err("cpu_map swap: unsupported long size\n"); 866 } 867 default: 868 break; 869 } 870 } 871 872 static void perf_event__stat_config_swap(union perf_event *event, 873 bool sample_id_all __maybe_unused) 874 { 875 u64 size; 876 877 size = event->stat_config.nr * sizeof(event->stat_config.data[0]); 878 size += 1; /* nr item itself */ 879 mem_bswap_64(&event->stat_config.nr, size); 880 } 881 882 static void perf_event__stat_swap(union perf_event *event, 883 bool sample_id_all __maybe_unused) 884 { 885 event->stat.id = bswap_64(event->stat.id); 886 event->stat.thread = bswap_32(event->stat.thread); 887 event->stat.cpu = bswap_32(event->stat.cpu); 888 event->stat.val = bswap_64(event->stat.val); 889 event->stat.ena = bswap_64(event->stat.ena); 890 event->stat.run = bswap_64(event->stat.run); 891 } 892 893 static void perf_event__stat_round_swap(union perf_event *event, 894 bool sample_id_all __maybe_unused) 895 { 896 event->stat_round.type = bswap_64(event->stat_round.type); 897 event->stat_round.time = bswap_64(event->stat_round.time); 898 } 899 900 typedef void (*perf_event__swap_op)(union perf_event *event, 901 bool sample_id_all); 902 903 static perf_event__swap_op perf_event__swap_ops[] = { 904 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 905 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap, 906 [PERF_RECORD_COMM] = perf_event__comm_swap, 907 [PERF_RECORD_FORK] = perf_event__task_swap, 908 [PERF_RECORD_EXIT] = perf_event__task_swap, 909 [PERF_RECORD_LOST] = perf_event__all64_swap, 910 [PERF_RECORD_READ] = perf_event__read_swap, 911 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap, 912 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap, 913 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 914 [PERF_RECORD_AUX] = perf_event__aux_swap, 915 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap, 916 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap, 917 [PERF_RECORD_SWITCH] = perf_event__switch_swap, 918 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap, 919 [PERF_RECORD_NAMESPACES] = perf_event__namespaces_swap, 920 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 921 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 922 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 923 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 924 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap, 925 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap, 926 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap, 927 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap, 928 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap, 929 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap, 930 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap, 931 [PERF_RECORD_STAT] = perf_event__stat_swap, 932 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap, 933 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap, 934 [PERF_RECORD_TIME_CONV] = perf_event__all64_swap, 935 [PERF_RECORD_HEADER_MAX] = NULL, 936 }; 937 938 /* 939 * When perf record finishes a pass on every buffers, it records this pseudo 940 * event. 941 * We record the max timestamp t found in the pass n. 942 * Assuming these timestamps are monotonic across cpus, we know that if 943 * a buffer still has events with timestamps below t, they will be all 944 * available and then read in the pass n + 1. 945 * Hence when we start to read the pass n + 2, we can safely flush every 946 * events with timestamps below t. 947 * 948 * ============ PASS n ================= 949 * CPU 0 | CPU 1 950 * | 951 * cnt1 timestamps | cnt2 timestamps 952 * 1 | 2 953 * 2 | 3 954 * - | 4 <--- max recorded 955 * 956 * ============ PASS n + 1 ============== 957 * CPU 0 | CPU 1 958 * | 959 * cnt1 timestamps | cnt2 timestamps 960 * 3 | 5 961 * 4 | 6 962 * 5 | 7 <---- max recorded 963 * 964 * Flush every events below timestamp 4 965 * 966 * ============ PASS n + 2 ============== 967 * CPU 0 | CPU 1 968 * | 969 * cnt1 timestamps | cnt2 timestamps 970 * 6 | 8 971 * 7 | 9 972 * - | 10 973 * 974 * Flush every events below timestamp 7 975 * etc... 976 */ 977 static int process_finished_round(struct perf_tool *tool __maybe_unused, 978 union perf_event *event __maybe_unused, 979 struct ordered_events *oe) 980 { 981 if (dump_trace) 982 fprintf(stdout, "\n"); 983 return ordered_events__flush(oe, OE_FLUSH__ROUND); 984 } 985 986 int perf_session__queue_event(struct perf_session *s, union perf_event *event, 987 u64 timestamp, u64 file_offset) 988 { 989 return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset); 990 } 991 992 static void callchain__lbr_callstack_printf(struct perf_sample *sample) 993 { 994 struct ip_callchain *callchain = sample->callchain; 995 struct branch_stack *lbr_stack = sample->branch_stack; 996 u64 kernel_callchain_nr = callchain->nr; 997 unsigned int i; 998 999 for (i = 0; i < kernel_callchain_nr; i++) { 1000 if (callchain->ips[i] == PERF_CONTEXT_USER) 1001 break; 1002 } 1003 1004 if ((i != kernel_callchain_nr) && lbr_stack->nr) { 1005 u64 total_nr; 1006 /* 1007 * LBR callstack can only get user call chain, 1008 * i is kernel call chain number, 1009 * 1 is PERF_CONTEXT_USER. 1010 * 1011 * The user call chain is stored in LBR registers. 1012 * LBR are pair registers. The caller is stored 1013 * in "from" register, while the callee is stored 1014 * in "to" register. 1015 * For example, there is a call stack 1016 * "A"->"B"->"C"->"D". 1017 * The LBR registers will recorde like 1018 * "C"->"D", "B"->"C", "A"->"B". 1019 * So only the first "to" register and all "from" 1020 * registers are needed to construct the whole stack. 1021 */ 1022 total_nr = i + 1 + lbr_stack->nr + 1; 1023 kernel_callchain_nr = i + 1; 1024 1025 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr); 1026 1027 for (i = 0; i < kernel_callchain_nr; i++) 1028 printf("..... %2d: %016" PRIx64 "\n", 1029 i, callchain->ips[i]); 1030 1031 printf("..... %2d: %016" PRIx64 "\n", 1032 (int)(kernel_callchain_nr), lbr_stack->entries[0].to); 1033 for (i = 0; i < lbr_stack->nr; i++) 1034 printf("..... %2d: %016" PRIx64 "\n", 1035 (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from); 1036 } 1037 } 1038 1039 static void callchain__printf(struct evsel *evsel, 1040 struct perf_sample *sample) 1041 { 1042 unsigned int i; 1043 struct ip_callchain *callchain = sample->callchain; 1044 1045 if (perf_evsel__has_branch_callstack(evsel)) 1046 callchain__lbr_callstack_printf(sample); 1047 1048 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr); 1049 1050 for (i = 0; i < callchain->nr; i++) 1051 printf("..... %2d: %016" PRIx64 "\n", 1052 i, callchain->ips[i]); 1053 } 1054 1055 static void branch_stack__printf(struct perf_sample *sample, bool callstack) 1056 { 1057 uint64_t i; 1058 1059 printf("%s: nr:%" PRIu64 "\n", 1060 !callstack ? "... branch stack" : "... branch callstack", 1061 sample->branch_stack->nr); 1062 1063 for (i = 0; i < sample->branch_stack->nr; i++) { 1064 struct branch_entry *e = &sample->branch_stack->entries[i]; 1065 1066 if (!callstack) { 1067 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n", 1068 i, e->from, e->to, 1069 (unsigned short)e->flags.cycles, 1070 e->flags.mispred ? "M" : " ", 1071 e->flags.predicted ? "P" : " ", 1072 e->flags.abort ? "A" : " ", 1073 e->flags.in_tx ? "T" : " ", 1074 (unsigned)e->flags.reserved); 1075 } else { 1076 printf("..... %2"PRIu64": %016" PRIx64 "\n", 1077 i, i > 0 ? e->from : e->to); 1078 } 1079 } 1080 } 1081 1082 static void regs_dump__printf(u64 mask, u64 *regs) 1083 { 1084 unsigned rid, i = 0; 1085 1086 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { 1087 u64 val = regs[i++]; 1088 1089 printf(".... %-5s 0x%" PRIx64 "\n", 1090 perf_reg_name(rid), val); 1091 } 1092 } 1093 1094 static const char *regs_abi[] = { 1095 [PERF_SAMPLE_REGS_ABI_NONE] = "none", 1096 [PERF_SAMPLE_REGS_ABI_32] = "32-bit", 1097 [PERF_SAMPLE_REGS_ABI_64] = "64-bit", 1098 }; 1099 1100 static inline const char *regs_dump_abi(struct regs_dump *d) 1101 { 1102 if (d->abi > PERF_SAMPLE_REGS_ABI_64) 1103 return "unknown"; 1104 1105 return regs_abi[d->abi]; 1106 } 1107 1108 static void regs__printf(const char *type, struct regs_dump *regs) 1109 { 1110 u64 mask = regs->mask; 1111 1112 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n", 1113 type, 1114 mask, 1115 regs_dump_abi(regs)); 1116 1117 regs_dump__printf(mask, regs->regs); 1118 } 1119 1120 static void regs_user__printf(struct perf_sample *sample) 1121 { 1122 struct regs_dump *user_regs = &sample->user_regs; 1123 1124 if (user_regs->regs) 1125 regs__printf("user", user_regs); 1126 } 1127 1128 static void regs_intr__printf(struct perf_sample *sample) 1129 { 1130 struct regs_dump *intr_regs = &sample->intr_regs; 1131 1132 if (intr_regs->regs) 1133 regs__printf("intr", intr_regs); 1134 } 1135 1136 static void stack_user__printf(struct stack_dump *dump) 1137 { 1138 printf("... ustack: size %" PRIu64 ", offset 0x%x\n", 1139 dump->size, dump->offset); 1140 } 1141 1142 static void perf_evlist__print_tstamp(struct evlist *evlist, 1143 union perf_event *event, 1144 struct perf_sample *sample) 1145 { 1146 u64 sample_type = __perf_evlist__combined_sample_type(evlist); 1147 1148 if (event->header.type != PERF_RECORD_SAMPLE && 1149 !perf_evlist__sample_id_all(evlist)) { 1150 fputs("-1 -1 ", stdout); 1151 return; 1152 } 1153 1154 if ((sample_type & PERF_SAMPLE_CPU)) 1155 printf("%u ", sample->cpu); 1156 1157 if (sample_type & PERF_SAMPLE_TIME) 1158 printf("%" PRIu64 " ", sample->time); 1159 } 1160 1161 static void sample_read__printf(struct perf_sample *sample, u64 read_format) 1162 { 1163 printf("... sample_read:\n"); 1164 1165 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1166 printf("...... time enabled %016" PRIx64 "\n", 1167 sample->read.time_enabled); 1168 1169 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1170 printf("...... time running %016" PRIx64 "\n", 1171 sample->read.time_running); 1172 1173 if (read_format & PERF_FORMAT_GROUP) { 1174 u64 i; 1175 1176 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr); 1177 1178 for (i = 0; i < sample->read.group.nr; i++) { 1179 struct sample_read_value *value; 1180 1181 value = &sample->read.group.values[i]; 1182 printf("..... id %016" PRIx64 1183 ", value %016" PRIx64 "\n", 1184 value->id, value->value); 1185 } 1186 } else 1187 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n", 1188 sample->read.one.id, sample->read.one.value); 1189 } 1190 1191 static void dump_event(struct evlist *evlist, union perf_event *event, 1192 u64 file_offset, struct perf_sample *sample) 1193 { 1194 if (!dump_trace) 1195 return; 1196 1197 printf("\n%#" PRIx64 " [%#x]: event: %d\n", 1198 file_offset, event->header.size, event->header.type); 1199 1200 trace_event(event); 1201 if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw) 1202 evlist->trace_event_sample_raw(evlist, event, sample); 1203 1204 if (sample) 1205 perf_evlist__print_tstamp(evlist, event, sample); 1206 1207 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 1208 event->header.size, perf_event__name(event->header.type)); 1209 } 1210 1211 static void dump_sample(struct evsel *evsel, union perf_event *event, 1212 struct perf_sample *sample) 1213 { 1214 u64 sample_type; 1215 1216 if (!dump_trace) 1217 return; 1218 1219 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 1220 event->header.misc, sample->pid, sample->tid, sample->ip, 1221 sample->period, sample->addr); 1222 1223 sample_type = evsel->core.attr.sample_type; 1224 1225 if (evsel__has_callchain(evsel)) 1226 callchain__printf(evsel, sample); 1227 1228 if (sample_type & PERF_SAMPLE_BRANCH_STACK) 1229 branch_stack__printf(sample, perf_evsel__has_branch_callstack(evsel)); 1230 1231 if (sample_type & PERF_SAMPLE_REGS_USER) 1232 regs_user__printf(sample); 1233 1234 if (sample_type & PERF_SAMPLE_REGS_INTR) 1235 regs_intr__printf(sample); 1236 1237 if (sample_type & PERF_SAMPLE_STACK_USER) 1238 stack_user__printf(&sample->user_stack); 1239 1240 if (sample_type & PERF_SAMPLE_WEIGHT) 1241 printf("... weight: %" PRIu64 "\n", sample->weight); 1242 1243 if (sample_type & PERF_SAMPLE_DATA_SRC) 1244 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src); 1245 1246 if (sample_type & PERF_SAMPLE_PHYS_ADDR) 1247 printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr); 1248 1249 if (sample_type & PERF_SAMPLE_TRANSACTION) 1250 printf("... transaction: %" PRIx64 "\n", sample->transaction); 1251 1252 if (sample_type & PERF_SAMPLE_READ) 1253 sample_read__printf(sample, evsel->core.attr.read_format); 1254 } 1255 1256 static void dump_read(struct evsel *evsel, union perf_event *event) 1257 { 1258 struct perf_record_read *read_event = &event->read; 1259 u64 read_format; 1260 1261 if (!dump_trace) 1262 return; 1263 1264 printf(": %d %d %s %" PRI_lu64 "\n", event->read.pid, event->read.tid, 1265 perf_evsel__name(evsel), 1266 event->read.value); 1267 1268 if (!evsel) 1269 return; 1270 1271 read_format = evsel->core.attr.read_format; 1272 1273 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1274 printf("... time enabled : %" PRI_lu64 "\n", read_event->time_enabled); 1275 1276 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1277 printf("... time running : %" PRI_lu64 "\n", read_event->time_running); 1278 1279 if (read_format & PERF_FORMAT_ID) 1280 printf("... id : %" PRI_lu64 "\n", read_event->id); 1281 } 1282 1283 static struct machine *machines__find_for_cpumode(struct machines *machines, 1284 union perf_event *event, 1285 struct perf_sample *sample) 1286 { 1287 struct machine *machine; 1288 1289 if (perf_guest && 1290 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 1291 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) { 1292 u32 pid; 1293 1294 if (event->header.type == PERF_RECORD_MMAP 1295 || event->header.type == PERF_RECORD_MMAP2) 1296 pid = event->mmap.pid; 1297 else 1298 pid = sample->pid; 1299 1300 machine = machines__find(machines, pid); 1301 if (!machine) 1302 machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID); 1303 return machine; 1304 } 1305 1306 return &machines->host; 1307 } 1308 1309 static int deliver_sample_value(struct evlist *evlist, 1310 struct perf_tool *tool, 1311 union perf_event *event, 1312 struct perf_sample *sample, 1313 struct sample_read_value *v, 1314 struct machine *machine) 1315 { 1316 struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id); 1317 1318 if (sid) { 1319 sample->id = v->id; 1320 sample->period = v->value - sid->period; 1321 sid->period = v->value; 1322 } 1323 1324 if (!sid || sid->evsel == NULL) { 1325 ++evlist->stats.nr_unknown_id; 1326 return 0; 1327 } 1328 1329 /* 1330 * There's no reason to deliver sample 1331 * for zero period, bail out. 1332 */ 1333 if (!sample->period) 1334 return 0; 1335 1336 return tool->sample(tool, event, sample, sid->evsel, machine); 1337 } 1338 1339 static int deliver_sample_group(struct evlist *evlist, 1340 struct perf_tool *tool, 1341 union perf_event *event, 1342 struct perf_sample *sample, 1343 struct machine *machine) 1344 { 1345 int ret = -EINVAL; 1346 u64 i; 1347 1348 for (i = 0; i < sample->read.group.nr; i++) { 1349 ret = deliver_sample_value(evlist, tool, event, sample, 1350 &sample->read.group.values[i], 1351 machine); 1352 if (ret) 1353 break; 1354 } 1355 1356 return ret; 1357 } 1358 1359 static int 1360 perf_evlist__deliver_sample(struct evlist *evlist, 1361 struct perf_tool *tool, 1362 union perf_event *event, 1363 struct perf_sample *sample, 1364 struct evsel *evsel, 1365 struct machine *machine) 1366 { 1367 /* We know evsel != NULL. */ 1368 u64 sample_type = evsel->core.attr.sample_type; 1369 u64 read_format = evsel->core.attr.read_format; 1370 1371 /* Standard sample delivery. */ 1372 if (!(sample_type & PERF_SAMPLE_READ)) 1373 return tool->sample(tool, event, sample, evsel, machine); 1374 1375 /* For PERF_SAMPLE_READ we have either single or group mode. */ 1376 if (read_format & PERF_FORMAT_GROUP) 1377 return deliver_sample_group(evlist, tool, event, sample, 1378 machine); 1379 else 1380 return deliver_sample_value(evlist, tool, event, sample, 1381 &sample->read.one, machine); 1382 } 1383 1384 static int machines__deliver_event(struct machines *machines, 1385 struct evlist *evlist, 1386 union perf_event *event, 1387 struct perf_sample *sample, 1388 struct perf_tool *tool, u64 file_offset) 1389 { 1390 struct evsel *evsel; 1391 struct machine *machine; 1392 1393 dump_event(evlist, event, file_offset, sample); 1394 1395 evsel = perf_evlist__id2evsel(evlist, sample->id); 1396 1397 machine = machines__find_for_cpumode(machines, event, sample); 1398 1399 switch (event->header.type) { 1400 case PERF_RECORD_SAMPLE: 1401 if (evsel == NULL) { 1402 ++evlist->stats.nr_unknown_id; 1403 return 0; 1404 } 1405 dump_sample(evsel, event, sample); 1406 if (machine == NULL) { 1407 ++evlist->stats.nr_unprocessable_samples; 1408 return 0; 1409 } 1410 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine); 1411 case PERF_RECORD_MMAP: 1412 return tool->mmap(tool, event, sample, machine); 1413 case PERF_RECORD_MMAP2: 1414 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT) 1415 ++evlist->stats.nr_proc_map_timeout; 1416 return tool->mmap2(tool, event, sample, machine); 1417 case PERF_RECORD_COMM: 1418 return tool->comm(tool, event, sample, machine); 1419 case PERF_RECORD_NAMESPACES: 1420 return tool->namespaces(tool, event, sample, machine); 1421 case PERF_RECORD_FORK: 1422 return tool->fork(tool, event, sample, machine); 1423 case PERF_RECORD_EXIT: 1424 return tool->exit(tool, event, sample, machine); 1425 case PERF_RECORD_LOST: 1426 if (tool->lost == perf_event__process_lost) 1427 evlist->stats.total_lost += event->lost.lost; 1428 return tool->lost(tool, event, sample, machine); 1429 case PERF_RECORD_LOST_SAMPLES: 1430 if (tool->lost_samples == perf_event__process_lost_samples) 1431 evlist->stats.total_lost_samples += event->lost_samples.lost; 1432 return tool->lost_samples(tool, event, sample, machine); 1433 case PERF_RECORD_READ: 1434 dump_read(evsel, event); 1435 return tool->read(tool, event, sample, evsel, machine); 1436 case PERF_RECORD_THROTTLE: 1437 return tool->throttle(tool, event, sample, machine); 1438 case PERF_RECORD_UNTHROTTLE: 1439 return tool->unthrottle(tool, event, sample, machine); 1440 case PERF_RECORD_AUX: 1441 if (tool->aux == perf_event__process_aux) { 1442 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) 1443 evlist->stats.total_aux_lost += 1; 1444 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL) 1445 evlist->stats.total_aux_partial += 1; 1446 } 1447 return tool->aux(tool, event, sample, machine); 1448 case PERF_RECORD_ITRACE_START: 1449 return tool->itrace_start(tool, event, sample, machine); 1450 case PERF_RECORD_SWITCH: 1451 case PERF_RECORD_SWITCH_CPU_WIDE: 1452 return tool->context_switch(tool, event, sample, machine); 1453 case PERF_RECORD_KSYMBOL: 1454 return tool->ksymbol(tool, event, sample, machine); 1455 case PERF_RECORD_BPF_EVENT: 1456 return tool->bpf(tool, event, sample, machine); 1457 default: 1458 ++evlist->stats.nr_unknown_events; 1459 return -1; 1460 } 1461 } 1462 1463 static int perf_session__deliver_event(struct perf_session *session, 1464 union perf_event *event, 1465 struct perf_tool *tool, 1466 u64 file_offset) 1467 { 1468 struct perf_sample sample; 1469 int ret; 1470 1471 ret = perf_evlist__parse_sample(session->evlist, event, &sample); 1472 if (ret) { 1473 pr_err("Can't parse sample, err = %d\n", ret); 1474 return ret; 1475 } 1476 1477 ret = auxtrace__process_event(session, event, &sample, tool); 1478 if (ret < 0) 1479 return ret; 1480 if (ret > 0) 1481 return 0; 1482 1483 return machines__deliver_event(&session->machines, session->evlist, 1484 event, &sample, tool, file_offset); 1485 } 1486 1487 static s64 perf_session__process_user_event(struct perf_session *session, 1488 union perf_event *event, 1489 u64 file_offset) 1490 { 1491 struct ordered_events *oe = &session->ordered_events; 1492 struct perf_tool *tool = session->tool; 1493 struct perf_sample sample = { .time = 0, }; 1494 int fd = perf_data__fd(session->data); 1495 int err; 1496 1497 if (event->header.type != PERF_RECORD_COMPRESSED || 1498 tool->compressed == perf_session__process_compressed_event_stub) 1499 dump_event(session->evlist, event, file_offset, &sample); 1500 1501 /* These events are processed right away */ 1502 switch (event->header.type) { 1503 case PERF_RECORD_HEADER_ATTR: 1504 err = tool->attr(tool, event, &session->evlist); 1505 if (err == 0) { 1506 perf_session__set_id_hdr_size(session); 1507 perf_session__set_comm_exec(session); 1508 } 1509 return err; 1510 case PERF_RECORD_EVENT_UPDATE: 1511 return tool->event_update(tool, event, &session->evlist); 1512 case PERF_RECORD_HEADER_EVENT_TYPE: 1513 /* 1514 * Depreceated, but we need to handle it for sake 1515 * of old data files create in pipe mode. 1516 */ 1517 return 0; 1518 case PERF_RECORD_HEADER_TRACING_DATA: 1519 /* setup for reading amidst mmap */ 1520 lseek(fd, file_offset, SEEK_SET); 1521 return tool->tracing_data(session, event); 1522 case PERF_RECORD_HEADER_BUILD_ID: 1523 return tool->build_id(session, event); 1524 case PERF_RECORD_FINISHED_ROUND: 1525 return tool->finished_round(tool, event, oe); 1526 case PERF_RECORD_ID_INDEX: 1527 return tool->id_index(session, event); 1528 case PERF_RECORD_AUXTRACE_INFO: 1529 return tool->auxtrace_info(session, event); 1530 case PERF_RECORD_AUXTRACE: 1531 /* setup for reading amidst mmap */ 1532 lseek(fd, file_offset + event->header.size, SEEK_SET); 1533 return tool->auxtrace(session, event); 1534 case PERF_RECORD_AUXTRACE_ERROR: 1535 perf_session__auxtrace_error_inc(session, event); 1536 return tool->auxtrace_error(session, event); 1537 case PERF_RECORD_THREAD_MAP: 1538 return tool->thread_map(session, event); 1539 case PERF_RECORD_CPU_MAP: 1540 return tool->cpu_map(session, event); 1541 case PERF_RECORD_STAT_CONFIG: 1542 return tool->stat_config(session, event); 1543 case PERF_RECORD_STAT: 1544 return tool->stat(session, event); 1545 case PERF_RECORD_STAT_ROUND: 1546 return tool->stat_round(session, event); 1547 case PERF_RECORD_TIME_CONV: 1548 session->time_conv = event->time_conv; 1549 return tool->time_conv(session, event); 1550 case PERF_RECORD_HEADER_FEATURE: 1551 return tool->feature(session, event); 1552 case PERF_RECORD_COMPRESSED: 1553 err = tool->compressed(session, event, file_offset); 1554 if (err) 1555 dump_event(session->evlist, event, file_offset, &sample); 1556 return err; 1557 default: 1558 return -EINVAL; 1559 } 1560 } 1561 1562 int perf_session__deliver_synth_event(struct perf_session *session, 1563 union perf_event *event, 1564 struct perf_sample *sample) 1565 { 1566 struct evlist *evlist = session->evlist; 1567 struct perf_tool *tool = session->tool; 1568 1569 events_stats__inc(&evlist->stats, event->header.type); 1570 1571 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1572 return perf_session__process_user_event(session, event, 0); 1573 1574 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0); 1575 } 1576 1577 static void event_swap(union perf_event *event, bool sample_id_all) 1578 { 1579 perf_event__swap_op swap; 1580 1581 swap = perf_event__swap_ops[event->header.type]; 1582 if (swap) 1583 swap(event, sample_id_all); 1584 } 1585 1586 int perf_session__peek_event(struct perf_session *session, off_t file_offset, 1587 void *buf, size_t buf_sz, 1588 union perf_event **event_ptr, 1589 struct perf_sample *sample) 1590 { 1591 union perf_event *event; 1592 size_t hdr_sz, rest; 1593 int fd; 1594 1595 if (session->one_mmap && !session->header.needs_swap) { 1596 event = file_offset - session->one_mmap_offset + 1597 session->one_mmap_addr; 1598 goto out_parse_sample; 1599 } 1600 1601 if (perf_data__is_pipe(session->data)) 1602 return -1; 1603 1604 fd = perf_data__fd(session->data); 1605 hdr_sz = sizeof(struct perf_event_header); 1606 1607 if (buf_sz < hdr_sz) 1608 return -1; 1609 1610 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 || 1611 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz) 1612 return -1; 1613 1614 event = (union perf_event *)buf; 1615 1616 if (session->header.needs_swap) 1617 perf_event_header__bswap(&event->header); 1618 1619 if (event->header.size < hdr_sz || event->header.size > buf_sz) 1620 return -1; 1621 1622 rest = event->header.size - hdr_sz; 1623 1624 if (readn(fd, buf, rest) != (ssize_t)rest) 1625 return -1; 1626 1627 if (session->header.needs_swap) 1628 event_swap(event, perf_evlist__sample_id_all(session->evlist)); 1629 1630 out_parse_sample: 1631 1632 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START && 1633 perf_evlist__parse_sample(session->evlist, event, sample)) 1634 return -1; 1635 1636 *event_ptr = event; 1637 1638 return 0; 1639 } 1640 1641 static s64 perf_session__process_event(struct perf_session *session, 1642 union perf_event *event, u64 file_offset) 1643 { 1644 struct evlist *evlist = session->evlist; 1645 struct perf_tool *tool = session->tool; 1646 int ret; 1647 1648 if (session->header.needs_swap) 1649 event_swap(event, perf_evlist__sample_id_all(evlist)); 1650 1651 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1652 return -EINVAL; 1653 1654 events_stats__inc(&evlist->stats, event->header.type); 1655 1656 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1657 return perf_session__process_user_event(session, event, file_offset); 1658 1659 if (tool->ordered_events) { 1660 u64 timestamp = -1ULL; 1661 1662 ret = perf_evlist__parse_sample_timestamp(evlist, event, ×tamp); 1663 if (ret && ret != -1) 1664 return ret; 1665 1666 ret = perf_session__queue_event(session, event, timestamp, file_offset); 1667 if (ret != -ETIME) 1668 return ret; 1669 } 1670 1671 return perf_session__deliver_event(session, event, tool, file_offset); 1672 } 1673 1674 void perf_event_header__bswap(struct perf_event_header *hdr) 1675 { 1676 hdr->type = bswap_32(hdr->type); 1677 hdr->misc = bswap_16(hdr->misc); 1678 hdr->size = bswap_16(hdr->size); 1679 } 1680 1681 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1682 { 1683 return machine__findnew_thread(&session->machines.host, -1, pid); 1684 } 1685 1686 /* 1687 * Threads are identified by pid and tid, and the idle task has pid == tid == 0. 1688 * So here a single thread is created for that, but actually there is a separate 1689 * idle task per cpu, so there should be one 'struct thread' per cpu, but there 1690 * is only 1. That causes problems for some tools, requiring workarounds. For 1691 * example get_idle_thread() in builtin-sched.c, or thread_stack__per_cpu(). 1692 */ 1693 int perf_session__register_idle_thread(struct perf_session *session) 1694 { 1695 struct thread *thread; 1696 int err = 0; 1697 1698 thread = machine__findnew_thread(&session->machines.host, 0, 0); 1699 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) { 1700 pr_err("problem inserting idle task.\n"); 1701 err = -1; 1702 } 1703 1704 if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) { 1705 pr_err("problem inserting idle task.\n"); 1706 err = -1; 1707 } 1708 1709 /* machine__findnew_thread() got the thread, so put it */ 1710 thread__put(thread); 1711 return err; 1712 } 1713 1714 static void 1715 perf_session__warn_order(const struct perf_session *session) 1716 { 1717 const struct ordered_events *oe = &session->ordered_events; 1718 struct evsel *evsel; 1719 bool should_warn = true; 1720 1721 evlist__for_each_entry(session->evlist, evsel) { 1722 if (evsel->core.attr.write_backward) 1723 should_warn = false; 1724 } 1725 1726 if (!should_warn) 1727 return; 1728 if (oe->nr_unordered_events != 0) 1729 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events); 1730 } 1731 1732 static void perf_session__warn_about_errors(const struct perf_session *session) 1733 { 1734 const struct events_stats *stats = &session->evlist->stats; 1735 1736 if (session->tool->lost == perf_event__process_lost && 1737 stats->nr_events[PERF_RECORD_LOST] != 0) { 1738 ui__warning("Processed %d events and lost %d chunks!\n\n" 1739 "Check IO/CPU overload!\n\n", 1740 stats->nr_events[0], 1741 stats->nr_events[PERF_RECORD_LOST]); 1742 } 1743 1744 if (session->tool->lost_samples == perf_event__process_lost_samples) { 1745 double drop_rate; 1746 1747 drop_rate = (double)stats->total_lost_samples / 1748 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples); 1749 if (drop_rate > 0.05) { 1750 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n", 1751 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples, 1752 drop_rate * 100.0); 1753 } 1754 } 1755 1756 if (session->tool->aux == perf_event__process_aux && 1757 stats->total_aux_lost != 0) { 1758 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n", 1759 stats->total_aux_lost, 1760 stats->nr_events[PERF_RECORD_AUX]); 1761 } 1762 1763 if (session->tool->aux == perf_event__process_aux && 1764 stats->total_aux_partial != 0) { 1765 bool vmm_exclusive = false; 1766 1767 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive", 1768 &vmm_exclusive); 1769 1770 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n" 1771 "Are you running a KVM guest in the background?%s\n\n", 1772 stats->total_aux_partial, 1773 stats->nr_events[PERF_RECORD_AUX], 1774 vmm_exclusive ? 1775 "\nReloading kvm_intel module with vmm_exclusive=0\n" 1776 "will reduce the gaps to only guest's timeslices." : 1777 ""); 1778 } 1779 1780 if (stats->nr_unknown_events != 0) { 1781 ui__warning("Found %u unknown events!\n\n" 1782 "Is this an older tool processing a perf.data " 1783 "file generated by a more recent tool?\n\n" 1784 "If that is not the case, consider " 1785 "reporting to linux-kernel@vger.kernel.org.\n\n", 1786 stats->nr_unknown_events); 1787 } 1788 1789 if (stats->nr_unknown_id != 0) { 1790 ui__warning("%u samples with id not present in the header\n", 1791 stats->nr_unknown_id); 1792 } 1793 1794 if (stats->nr_invalid_chains != 0) { 1795 ui__warning("Found invalid callchains!\n\n" 1796 "%u out of %u events were discarded for this reason.\n\n" 1797 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1798 stats->nr_invalid_chains, 1799 stats->nr_events[PERF_RECORD_SAMPLE]); 1800 } 1801 1802 if (stats->nr_unprocessable_samples != 0) { 1803 ui__warning("%u unprocessable samples recorded.\n" 1804 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1805 stats->nr_unprocessable_samples); 1806 } 1807 1808 perf_session__warn_order(session); 1809 1810 events_stats__auxtrace_error_warn(stats); 1811 1812 if (stats->nr_proc_map_timeout != 0) { 1813 ui__warning("%d map information files for pre-existing threads were\n" 1814 "not processed, if there are samples for addresses they\n" 1815 "will not be resolved, you may find out which are these\n" 1816 "threads by running with -v and redirecting the output\n" 1817 "to a file.\n" 1818 "The time limit to process proc map is too short?\n" 1819 "Increase it by --proc-map-timeout\n", 1820 stats->nr_proc_map_timeout); 1821 } 1822 } 1823 1824 static int perf_session__flush_thread_stack(struct thread *thread, 1825 void *p __maybe_unused) 1826 { 1827 return thread_stack__flush(thread); 1828 } 1829 1830 static int perf_session__flush_thread_stacks(struct perf_session *session) 1831 { 1832 return machines__for_each_thread(&session->machines, 1833 perf_session__flush_thread_stack, 1834 NULL); 1835 } 1836 1837 volatile int session_done; 1838 1839 static int __perf_session__process_decomp_events(struct perf_session *session); 1840 1841 static int __perf_session__process_pipe_events(struct perf_session *session) 1842 { 1843 struct ordered_events *oe = &session->ordered_events; 1844 struct perf_tool *tool = session->tool; 1845 int fd = perf_data__fd(session->data); 1846 union perf_event *event; 1847 uint32_t size, cur_size = 0; 1848 void *buf = NULL; 1849 s64 skip = 0; 1850 u64 head; 1851 ssize_t err; 1852 void *p; 1853 1854 perf_tool__fill_defaults(tool); 1855 1856 head = 0; 1857 cur_size = sizeof(union perf_event); 1858 1859 buf = malloc(cur_size); 1860 if (!buf) 1861 return -errno; 1862 ordered_events__set_copy_on_queue(oe, true); 1863 more: 1864 event = buf; 1865 err = readn(fd, event, sizeof(struct perf_event_header)); 1866 if (err <= 0) { 1867 if (err == 0) 1868 goto done; 1869 1870 pr_err("failed to read event header\n"); 1871 goto out_err; 1872 } 1873 1874 if (session->header.needs_swap) 1875 perf_event_header__bswap(&event->header); 1876 1877 size = event->header.size; 1878 if (size < sizeof(struct perf_event_header)) { 1879 pr_err("bad event header size\n"); 1880 goto out_err; 1881 } 1882 1883 if (size > cur_size) { 1884 void *new = realloc(buf, size); 1885 if (!new) { 1886 pr_err("failed to allocate memory to read event\n"); 1887 goto out_err; 1888 } 1889 buf = new; 1890 cur_size = size; 1891 event = buf; 1892 } 1893 p = event; 1894 p += sizeof(struct perf_event_header); 1895 1896 if (size - sizeof(struct perf_event_header)) { 1897 err = readn(fd, p, size - sizeof(struct perf_event_header)); 1898 if (err <= 0) { 1899 if (err == 0) { 1900 pr_err("unexpected end of event stream\n"); 1901 goto done; 1902 } 1903 1904 pr_err("failed to read event data\n"); 1905 goto out_err; 1906 } 1907 } 1908 1909 if ((skip = perf_session__process_event(session, event, head)) < 0) { 1910 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1911 head, event->header.size, event->header.type); 1912 err = -EINVAL; 1913 goto out_err; 1914 } 1915 1916 head += size; 1917 1918 if (skip > 0) 1919 head += skip; 1920 1921 err = __perf_session__process_decomp_events(session); 1922 if (err) 1923 goto out_err; 1924 1925 if (!session_done()) 1926 goto more; 1927 done: 1928 /* do the final flush for ordered samples */ 1929 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 1930 if (err) 1931 goto out_err; 1932 err = auxtrace__flush_events(session, tool); 1933 if (err) 1934 goto out_err; 1935 err = perf_session__flush_thread_stacks(session); 1936 out_err: 1937 free(buf); 1938 if (!tool->no_warn) 1939 perf_session__warn_about_errors(session); 1940 ordered_events__free(&session->ordered_events); 1941 auxtrace__free_events(session); 1942 return err; 1943 } 1944 1945 static union perf_event * 1946 fetch_mmaped_event(struct perf_session *session, 1947 u64 head, size_t mmap_size, char *buf) 1948 { 1949 union perf_event *event; 1950 1951 /* 1952 * Ensure we have enough space remaining to read 1953 * the size of the event in the headers. 1954 */ 1955 if (head + sizeof(event->header) > mmap_size) 1956 return NULL; 1957 1958 event = (union perf_event *)(buf + head); 1959 1960 if (session->header.needs_swap) 1961 perf_event_header__bswap(&event->header); 1962 1963 if (head + event->header.size > mmap_size) { 1964 /* We're not fetching the event so swap back again */ 1965 if (session->header.needs_swap) 1966 perf_event_header__bswap(&event->header); 1967 pr_debug("%s: head=%#" PRIx64 " event->header_size=%#x, mmap_size=%#zx: fuzzed perf.data?\n", 1968 __func__, head, event->header.size, mmap_size); 1969 return ERR_PTR(-EINVAL); 1970 } 1971 1972 return event; 1973 } 1974 1975 static int __perf_session__process_decomp_events(struct perf_session *session) 1976 { 1977 s64 skip; 1978 u64 size, file_pos = 0; 1979 struct decomp *decomp = session->decomp_last; 1980 1981 if (!decomp) 1982 return 0; 1983 1984 while (decomp->head < decomp->size && !session_done()) { 1985 union perf_event *event = fetch_mmaped_event(session, decomp->head, decomp->size, decomp->data); 1986 1987 if (IS_ERR(event)) 1988 return PTR_ERR(event); 1989 1990 if (!event) 1991 break; 1992 1993 size = event->header.size; 1994 1995 if (size < sizeof(struct perf_event_header) || 1996 (skip = perf_session__process_event(session, event, file_pos)) < 0) { 1997 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1998 decomp->file_pos + decomp->head, event->header.size, event->header.type); 1999 return -EINVAL; 2000 } 2001 2002 if (skip) 2003 size += skip; 2004 2005 decomp->head += size; 2006 } 2007 2008 return 0; 2009 } 2010 2011 /* 2012 * On 64bit we can mmap the data file in one go. No need for tiny mmap 2013 * slices. On 32bit we use 32MB. 2014 */ 2015 #if BITS_PER_LONG == 64 2016 #define MMAP_SIZE ULLONG_MAX 2017 #define NUM_MMAPS 1 2018 #else 2019 #define MMAP_SIZE (32 * 1024 * 1024ULL) 2020 #define NUM_MMAPS 128 2021 #endif 2022 2023 struct reader; 2024 2025 typedef s64 (*reader_cb_t)(struct perf_session *session, 2026 union perf_event *event, 2027 u64 file_offset); 2028 2029 struct reader { 2030 int fd; 2031 u64 data_size; 2032 u64 data_offset; 2033 reader_cb_t process; 2034 }; 2035 2036 static int 2037 reader__process_events(struct reader *rd, struct perf_session *session, 2038 struct ui_progress *prog) 2039 { 2040 u64 data_size = rd->data_size; 2041 u64 head, page_offset, file_offset, file_pos, size; 2042 int err = 0, mmap_prot, mmap_flags, map_idx = 0; 2043 size_t mmap_size; 2044 char *buf, *mmaps[NUM_MMAPS]; 2045 union perf_event *event; 2046 s64 skip; 2047 2048 page_offset = page_size * (rd->data_offset / page_size); 2049 file_offset = page_offset; 2050 head = rd->data_offset - page_offset; 2051 2052 ui_progress__init_size(prog, data_size, "Processing events..."); 2053 2054 data_size += rd->data_offset; 2055 2056 mmap_size = MMAP_SIZE; 2057 if (mmap_size > data_size) { 2058 mmap_size = data_size; 2059 session->one_mmap = true; 2060 } 2061 2062 memset(mmaps, 0, sizeof(mmaps)); 2063 2064 mmap_prot = PROT_READ; 2065 mmap_flags = MAP_SHARED; 2066 2067 if (session->header.needs_swap) { 2068 mmap_prot |= PROT_WRITE; 2069 mmap_flags = MAP_PRIVATE; 2070 } 2071 remap: 2072 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, rd->fd, 2073 file_offset); 2074 if (buf == MAP_FAILED) { 2075 pr_err("failed to mmap file\n"); 2076 err = -errno; 2077 goto out; 2078 } 2079 mmaps[map_idx] = buf; 2080 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 2081 file_pos = file_offset + head; 2082 if (session->one_mmap) { 2083 session->one_mmap_addr = buf; 2084 session->one_mmap_offset = file_offset; 2085 } 2086 2087 more: 2088 event = fetch_mmaped_event(session, head, mmap_size, buf); 2089 if (IS_ERR(event)) 2090 return PTR_ERR(event); 2091 2092 if (!event) { 2093 if (mmaps[map_idx]) { 2094 munmap(mmaps[map_idx], mmap_size); 2095 mmaps[map_idx] = NULL; 2096 } 2097 2098 page_offset = page_size * (head / page_size); 2099 file_offset += page_offset; 2100 head -= page_offset; 2101 goto remap; 2102 } 2103 2104 size = event->header.size; 2105 2106 skip = -EINVAL; 2107 2108 if (size < sizeof(struct perf_event_header) || 2109 (skip = rd->process(session, event, file_pos)) < 0) { 2110 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n", 2111 file_offset + head, event->header.size, 2112 event->header.type, strerror(-skip)); 2113 err = skip; 2114 goto out; 2115 } 2116 2117 if (skip) 2118 size += skip; 2119 2120 head += size; 2121 file_pos += size; 2122 2123 err = __perf_session__process_decomp_events(session); 2124 if (err) 2125 goto out; 2126 2127 ui_progress__update(prog, size); 2128 2129 if (session_done()) 2130 goto out; 2131 2132 if (file_pos < data_size) 2133 goto more; 2134 2135 out: 2136 return err; 2137 } 2138 2139 static s64 process_simple(struct perf_session *session, 2140 union perf_event *event, 2141 u64 file_offset) 2142 { 2143 return perf_session__process_event(session, event, file_offset); 2144 } 2145 2146 static int __perf_session__process_events(struct perf_session *session) 2147 { 2148 struct reader rd = { 2149 .fd = perf_data__fd(session->data), 2150 .data_size = session->header.data_size, 2151 .data_offset = session->header.data_offset, 2152 .process = process_simple, 2153 }; 2154 struct ordered_events *oe = &session->ordered_events; 2155 struct perf_tool *tool = session->tool; 2156 struct ui_progress prog; 2157 int err; 2158 2159 perf_tool__fill_defaults(tool); 2160 2161 if (rd.data_size == 0) 2162 return -1; 2163 2164 ui_progress__init_size(&prog, rd.data_size, "Processing events..."); 2165 2166 err = reader__process_events(&rd, session, &prog); 2167 if (err) 2168 goto out_err; 2169 /* do the final flush for ordered samples */ 2170 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 2171 if (err) 2172 goto out_err; 2173 err = auxtrace__flush_events(session, tool); 2174 if (err) 2175 goto out_err; 2176 err = perf_session__flush_thread_stacks(session); 2177 out_err: 2178 ui_progress__finish(); 2179 if (!tool->no_warn) 2180 perf_session__warn_about_errors(session); 2181 /* 2182 * We may switching perf.data output, make ordered_events 2183 * reusable. 2184 */ 2185 ordered_events__reinit(&session->ordered_events); 2186 auxtrace__free_events(session); 2187 session->one_mmap = false; 2188 return err; 2189 } 2190 2191 int perf_session__process_events(struct perf_session *session) 2192 { 2193 if (perf_session__register_idle_thread(session) < 0) 2194 return -ENOMEM; 2195 2196 if (perf_data__is_pipe(session->data)) 2197 return __perf_session__process_pipe_events(session); 2198 2199 return __perf_session__process_events(session); 2200 } 2201 2202 bool perf_session__has_traces(struct perf_session *session, const char *msg) 2203 { 2204 struct evsel *evsel; 2205 2206 evlist__for_each_entry(session->evlist, evsel) { 2207 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) 2208 return true; 2209 } 2210 2211 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 2212 return false; 2213 } 2214 2215 int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr) 2216 { 2217 char *bracket; 2218 struct ref_reloc_sym *ref; 2219 struct kmap *kmap; 2220 2221 ref = zalloc(sizeof(struct ref_reloc_sym)); 2222 if (ref == NULL) 2223 return -ENOMEM; 2224 2225 ref->name = strdup(symbol_name); 2226 if (ref->name == NULL) { 2227 free(ref); 2228 return -ENOMEM; 2229 } 2230 2231 bracket = strchr(ref->name, ']'); 2232 if (bracket) 2233 *bracket = '\0'; 2234 2235 ref->addr = addr; 2236 2237 kmap = map__kmap(map); 2238 if (kmap) 2239 kmap->ref_reloc_sym = ref; 2240 2241 return 0; 2242 } 2243 2244 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp) 2245 { 2246 return machines__fprintf_dsos(&session->machines, fp); 2247 } 2248 2249 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp, 2250 bool (skip)(struct dso *dso, int parm), int parm) 2251 { 2252 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm); 2253 } 2254 2255 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 2256 { 2257 size_t ret; 2258 const char *msg = ""; 2259 2260 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE)) 2261 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)"; 2262 2263 ret = fprintf(fp, "\nAggregated stats:%s\n", msg); 2264 2265 ret += events_stats__fprintf(&session->evlist->stats, fp); 2266 return ret; 2267 } 2268 2269 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 2270 { 2271 /* 2272 * FIXME: Here we have to actually print all the machines in this 2273 * session, not just the host... 2274 */ 2275 return machine__fprintf(&session->machines.host, fp); 2276 } 2277 2278 struct evsel *perf_session__find_first_evtype(struct perf_session *session, 2279 unsigned int type) 2280 { 2281 struct evsel *pos; 2282 2283 evlist__for_each_entry(session->evlist, pos) { 2284 if (pos->core.attr.type == type) 2285 return pos; 2286 } 2287 return NULL; 2288 } 2289 2290 int perf_session__cpu_bitmap(struct perf_session *session, 2291 const char *cpu_list, unsigned long *cpu_bitmap) 2292 { 2293 int i, err = -1; 2294 struct perf_cpu_map *map; 2295 int nr_cpus = min(session->header.env.nr_cpus_online, MAX_NR_CPUS); 2296 2297 for (i = 0; i < PERF_TYPE_MAX; ++i) { 2298 struct evsel *evsel; 2299 2300 evsel = perf_session__find_first_evtype(session, i); 2301 if (!evsel) 2302 continue; 2303 2304 if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CPU)) { 2305 pr_err("File does not contain CPU events. " 2306 "Remove -C option to proceed.\n"); 2307 return -1; 2308 } 2309 } 2310 2311 map = perf_cpu_map__new(cpu_list); 2312 if (map == NULL) { 2313 pr_err("Invalid cpu_list\n"); 2314 return -1; 2315 } 2316 2317 for (i = 0; i < map->nr; i++) { 2318 int cpu = map->map[i]; 2319 2320 if (cpu >= nr_cpus) { 2321 pr_err("Requested CPU %d too large. " 2322 "Consider raising MAX_NR_CPUS\n", cpu); 2323 goto out_delete_map; 2324 } 2325 2326 set_bit(cpu, cpu_bitmap); 2327 } 2328 2329 err = 0; 2330 2331 out_delete_map: 2332 perf_cpu_map__put(map); 2333 return err; 2334 } 2335 2336 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 2337 bool full) 2338 { 2339 if (session == NULL || fp == NULL) 2340 return; 2341 2342 fprintf(fp, "# ========\n"); 2343 perf_header__fprintf_info(session, fp, full); 2344 fprintf(fp, "# ========\n#\n"); 2345 } 2346 2347 2348 int __perf_session__set_tracepoints_handlers(struct perf_session *session, 2349 const struct evsel_str_handler *assocs, 2350 size_t nr_assocs) 2351 { 2352 struct evsel *evsel; 2353 size_t i; 2354 int err; 2355 2356 for (i = 0; i < nr_assocs; i++) { 2357 /* 2358 * Adding a handler for an event not in the session, 2359 * just ignore it. 2360 */ 2361 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name); 2362 if (evsel == NULL) 2363 continue; 2364 2365 err = -EEXIST; 2366 if (evsel->handler != NULL) 2367 goto out; 2368 evsel->handler = assocs[i].handler; 2369 } 2370 2371 err = 0; 2372 out: 2373 return err; 2374 } 2375 2376 int perf_event__process_id_index(struct perf_session *session, 2377 union perf_event *event) 2378 { 2379 struct evlist *evlist = session->evlist; 2380 struct perf_record_id_index *ie = &event->id_index; 2381 size_t i, nr, max_nr; 2382 2383 max_nr = (ie->header.size - sizeof(struct perf_record_id_index)) / 2384 sizeof(struct id_index_entry); 2385 nr = ie->nr; 2386 if (nr > max_nr) 2387 return -EINVAL; 2388 2389 if (dump_trace) 2390 fprintf(stdout, " nr: %zu\n", nr); 2391 2392 for (i = 0; i < nr; i++) { 2393 struct id_index_entry *e = &ie->entries[i]; 2394 struct perf_sample_id *sid; 2395 2396 if (dump_trace) { 2397 fprintf(stdout, " ... id: %"PRI_lu64, e->id); 2398 fprintf(stdout, " idx: %"PRI_lu64, e->idx); 2399 fprintf(stdout, " cpu: %"PRI_ld64, e->cpu); 2400 fprintf(stdout, " tid: %"PRI_ld64"\n", e->tid); 2401 } 2402 2403 sid = perf_evlist__id2sid(evlist, e->id); 2404 if (!sid) 2405 return -ENOENT; 2406 sid->idx = e->idx; 2407 sid->cpu = e->cpu; 2408 sid->tid = e->tid; 2409 } 2410 return 0; 2411 } 2412 2413 int perf_event__synthesize_id_index(struct perf_tool *tool, 2414 perf_event__handler_t process, 2415 struct evlist *evlist, 2416 struct machine *machine) 2417 { 2418 union perf_event *ev; 2419 struct evsel *evsel; 2420 size_t nr = 0, i = 0, sz, max_nr, n; 2421 int err; 2422 2423 pr_debug2("Synthesizing id index\n"); 2424 2425 max_nr = (UINT16_MAX - sizeof(struct perf_record_id_index)) / 2426 sizeof(struct id_index_entry); 2427 2428 evlist__for_each_entry(evlist, evsel) 2429 nr += evsel->ids; 2430 2431 n = nr > max_nr ? max_nr : nr; 2432 sz = sizeof(struct perf_record_id_index) + n * sizeof(struct id_index_entry); 2433 ev = zalloc(sz); 2434 if (!ev) 2435 return -ENOMEM; 2436 2437 ev->id_index.header.type = PERF_RECORD_ID_INDEX; 2438 ev->id_index.header.size = sz; 2439 ev->id_index.nr = n; 2440 2441 evlist__for_each_entry(evlist, evsel) { 2442 u32 j; 2443 2444 for (j = 0; j < evsel->ids; j++) { 2445 struct id_index_entry *e; 2446 struct perf_sample_id *sid; 2447 2448 if (i >= n) { 2449 err = process(tool, ev, NULL, machine); 2450 if (err) 2451 goto out_err; 2452 nr -= n; 2453 i = 0; 2454 } 2455 2456 e = &ev->id_index.entries[i++]; 2457 2458 e->id = evsel->id[j]; 2459 2460 sid = perf_evlist__id2sid(evlist, e->id); 2461 if (!sid) { 2462 free(ev); 2463 return -ENOENT; 2464 } 2465 2466 e->idx = sid->idx; 2467 e->cpu = sid->cpu; 2468 e->tid = sid->tid; 2469 } 2470 } 2471 2472 sz = sizeof(struct perf_record_id_index) + nr * sizeof(struct id_index_entry); 2473 ev->id_index.header.size = sz; 2474 ev->id_index.nr = nr; 2475 2476 err = process(tool, ev, NULL, machine); 2477 out_err: 2478 free(ev); 2479 2480 return err; 2481 } 2482