1 // SPDX-License-Identifier: GPL-2.0 2 #include <errno.h> 3 #include <inttypes.h> 4 #include <linux/kernel.h> 5 #include <traceevent/event-parse.h> 6 #include <api/fs/fs.h> 7 8 #include <byteswap.h> 9 #include <unistd.h> 10 #include <sys/types.h> 11 #include <sys/mman.h> 12 13 #include "evlist.h" 14 #include "evsel.h" 15 #include "memswap.h" 16 #include "map.h" 17 #include "symbol.h" 18 #include "session.h" 19 #include "tool.h" 20 #include "sort.h" 21 #include "util.h" 22 #include "cpumap.h" 23 #include "perf_regs.h" 24 #include "asm/bug.h" 25 #include "auxtrace.h" 26 #include "thread.h" 27 #include "thread-stack.h" 28 #include "sample-raw.h" 29 #include "stat.h" 30 #include "arch/common.h" 31 32 static int perf_session__deliver_event(struct perf_session *session, 33 union perf_event *event, 34 struct perf_tool *tool, 35 u64 file_offset); 36 37 static int perf_session__open(struct perf_session *session) 38 { 39 struct perf_data *data = session->data; 40 41 if (perf_session__read_header(session) < 0) { 42 pr_err("incompatible file format (rerun with -v to learn more)\n"); 43 return -1; 44 } 45 46 if (perf_data__is_pipe(data)) 47 return 0; 48 49 if (perf_header__has_feat(&session->header, HEADER_STAT)) 50 return 0; 51 52 if (!perf_evlist__valid_sample_type(session->evlist)) { 53 pr_err("non matching sample_type\n"); 54 return -1; 55 } 56 57 if (!perf_evlist__valid_sample_id_all(session->evlist)) { 58 pr_err("non matching sample_id_all\n"); 59 return -1; 60 } 61 62 if (!perf_evlist__valid_read_format(session->evlist)) { 63 pr_err("non matching read_format\n"); 64 return -1; 65 } 66 67 return 0; 68 } 69 70 void perf_session__set_id_hdr_size(struct perf_session *session) 71 { 72 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist); 73 74 machines__set_id_hdr_size(&session->machines, id_hdr_size); 75 } 76 77 int perf_session__create_kernel_maps(struct perf_session *session) 78 { 79 int ret = machine__create_kernel_maps(&session->machines.host); 80 81 if (ret >= 0) 82 ret = machines__create_guest_kernel_maps(&session->machines); 83 return ret; 84 } 85 86 static void perf_session__destroy_kernel_maps(struct perf_session *session) 87 { 88 machines__destroy_kernel_maps(&session->machines); 89 } 90 91 static bool perf_session__has_comm_exec(struct perf_session *session) 92 { 93 struct perf_evsel *evsel; 94 95 evlist__for_each_entry(session->evlist, evsel) { 96 if (evsel->attr.comm_exec) 97 return true; 98 } 99 100 return false; 101 } 102 103 static void perf_session__set_comm_exec(struct perf_session *session) 104 { 105 bool comm_exec = perf_session__has_comm_exec(session); 106 107 machines__set_comm_exec(&session->machines, comm_exec); 108 } 109 110 static int ordered_events__deliver_event(struct ordered_events *oe, 111 struct ordered_event *event) 112 { 113 struct perf_session *session = container_of(oe, struct perf_session, 114 ordered_events); 115 116 return perf_session__deliver_event(session, event->event, 117 session->tool, event->file_offset); 118 } 119 120 struct perf_session *perf_session__new(struct perf_data *data, 121 bool repipe, struct perf_tool *tool) 122 { 123 struct perf_session *session = zalloc(sizeof(*session)); 124 125 if (!session) 126 goto out; 127 128 session->repipe = repipe; 129 session->tool = tool; 130 INIT_LIST_HEAD(&session->auxtrace_index); 131 machines__init(&session->machines); 132 ordered_events__init(&session->ordered_events, 133 ordered_events__deliver_event, NULL); 134 135 perf_env__init(&session->header.env); 136 if (data) { 137 if (perf_data__open(data)) 138 goto out_delete; 139 140 session->data = data; 141 142 if (perf_data__is_read(data)) { 143 if (perf_session__open(session) < 0) 144 goto out_delete; 145 146 /* 147 * set session attributes that are present in perf.data 148 * but not in pipe-mode. 149 */ 150 if (!data->is_pipe) { 151 perf_session__set_id_hdr_size(session); 152 perf_session__set_comm_exec(session); 153 } 154 155 perf_evlist__init_trace_event_sample_raw(session->evlist); 156 157 /* Open the directory data. */ 158 if (data->is_dir && perf_data__open_dir(data)) 159 goto out_delete; 160 } 161 } else { 162 session->machines.host.env = &perf_env; 163 } 164 165 session->machines.host.single_address_space = 166 perf_env__single_address_space(session->machines.host.env); 167 168 if (!data || perf_data__is_write(data)) { 169 /* 170 * In O_RDONLY mode this will be performed when reading the 171 * kernel MMAP event, in perf_event__process_mmap(). 172 */ 173 if (perf_session__create_kernel_maps(session) < 0) 174 pr_warning("Cannot read kernel map\n"); 175 } 176 177 /* 178 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is 179 * processed, so perf_evlist__sample_id_all is not meaningful here. 180 */ 181 if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps && 182 tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) { 183 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); 184 tool->ordered_events = false; 185 } 186 187 return session; 188 189 out_delete: 190 perf_session__delete(session); 191 out: 192 return NULL; 193 } 194 195 static void perf_session__delete_threads(struct perf_session *session) 196 { 197 machine__delete_threads(&session->machines.host); 198 } 199 200 void perf_session__delete(struct perf_session *session) 201 { 202 if (session == NULL) 203 return; 204 auxtrace__free(session); 205 auxtrace_index__free(&session->auxtrace_index); 206 perf_session__destroy_kernel_maps(session); 207 perf_session__delete_threads(session); 208 perf_env__exit(&session->header.env); 209 machines__exit(&session->machines); 210 if (session->data) 211 perf_data__close(session->data); 212 free(session); 213 } 214 215 static int process_event_synth_tracing_data_stub(struct perf_session *session 216 __maybe_unused, 217 union perf_event *event 218 __maybe_unused) 219 { 220 dump_printf(": unhandled!\n"); 221 return 0; 222 } 223 224 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused, 225 union perf_event *event __maybe_unused, 226 struct perf_evlist **pevlist 227 __maybe_unused) 228 { 229 dump_printf(": unhandled!\n"); 230 return 0; 231 } 232 233 static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused, 234 union perf_event *event __maybe_unused, 235 struct perf_evlist **pevlist 236 __maybe_unused) 237 { 238 if (dump_trace) 239 perf_event__fprintf_event_update(event, stdout); 240 241 dump_printf(": unhandled!\n"); 242 return 0; 243 } 244 245 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused, 246 union perf_event *event __maybe_unused, 247 struct perf_sample *sample __maybe_unused, 248 struct perf_evsel *evsel __maybe_unused, 249 struct machine *machine __maybe_unused) 250 { 251 dump_printf(": unhandled!\n"); 252 return 0; 253 } 254 255 static int process_event_stub(struct perf_tool *tool __maybe_unused, 256 union perf_event *event __maybe_unused, 257 struct perf_sample *sample __maybe_unused, 258 struct machine *machine __maybe_unused) 259 { 260 dump_printf(": unhandled!\n"); 261 return 0; 262 } 263 264 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused, 265 union perf_event *event __maybe_unused, 266 struct ordered_events *oe __maybe_unused) 267 { 268 dump_printf(": unhandled!\n"); 269 return 0; 270 } 271 272 static int process_finished_round(struct perf_tool *tool, 273 union perf_event *event, 274 struct ordered_events *oe); 275 276 static int skipn(int fd, off_t n) 277 { 278 char buf[4096]; 279 ssize_t ret; 280 281 while (n > 0) { 282 ret = read(fd, buf, min(n, (off_t)sizeof(buf))); 283 if (ret <= 0) 284 return ret; 285 n -= ret; 286 } 287 288 return 0; 289 } 290 291 static s64 process_event_auxtrace_stub(struct perf_session *session __maybe_unused, 292 union perf_event *event) 293 { 294 dump_printf(": unhandled!\n"); 295 if (perf_data__is_pipe(session->data)) 296 skipn(perf_data__fd(session->data), event->auxtrace.size); 297 return event->auxtrace.size; 298 } 299 300 static int process_event_op2_stub(struct perf_session *session __maybe_unused, 301 union perf_event *event __maybe_unused) 302 { 303 dump_printf(": unhandled!\n"); 304 return 0; 305 } 306 307 308 static 309 int process_event_thread_map_stub(struct perf_session *session __maybe_unused, 310 union perf_event *event __maybe_unused) 311 { 312 if (dump_trace) 313 perf_event__fprintf_thread_map(event, stdout); 314 315 dump_printf(": unhandled!\n"); 316 return 0; 317 } 318 319 static 320 int process_event_cpu_map_stub(struct perf_session *session __maybe_unused, 321 union perf_event *event __maybe_unused) 322 { 323 if (dump_trace) 324 perf_event__fprintf_cpu_map(event, stdout); 325 326 dump_printf(": unhandled!\n"); 327 return 0; 328 } 329 330 static 331 int process_event_stat_config_stub(struct perf_session *session __maybe_unused, 332 union perf_event *event __maybe_unused) 333 { 334 if (dump_trace) 335 perf_event__fprintf_stat_config(event, stdout); 336 337 dump_printf(": unhandled!\n"); 338 return 0; 339 } 340 341 static int process_stat_stub(struct perf_session *perf_session __maybe_unused, 342 union perf_event *event) 343 { 344 if (dump_trace) 345 perf_event__fprintf_stat(event, stdout); 346 347 dump_printf(": unhandled!\n"); 348 return 0; 349 } 350 351 static int process_stat_round_stub(struct perf_session *perf_session __maybe_unused, 352 union perf_event *event) 353 { 354 if (dump_trace) 355 perf_event__fprintf_stat_round(event, stdout); 356 357 dump_printf(": unhandled!\n"); 358 return 0; 359 } 360 361 static int perf_session__process_compressed_event_stub(struct perf_session *session __maybe_unused, 362 union perf_event *event __maybe_unused, 363 u64 file_offset __maybe_unused) 364 { 365 dump_printf(": unhandled!\n"); 366 return 0; 367 } 368 369 void perf_tool__fill_defaults(struct perf_tool *tool) 370 { 371 if (tool->sample == NULL) 372 tool->sample = process_event_sample_stub; 373 if (tool->mmap == NULL) 374 tool->mmap = process_event_stub; 375 if (tool->mmap2 == NULL) 376 tool->mmap2 = process_event_stub; 377 if (tool->comm == NULL) 378 tool->comm = process_event_stub; 379 if (tool->namespaces == NULL) 380 tool->namespaces = process_event_stub; 381 if (tool->fork == NULL) 382 tool->fork = process_event_stub; 383 if (tool->exit == NULL) 384 tool->exit = process_event_stub; 385 if (tool->lost == NULL) 386 tool->lost = perf_event__process_lost; 387 if (tool->lost_samples == NULL) 388 tool->lost_samples = perf_event__process_lost_samples; 389 if (tool->aux == NULL) 390 tool->aux = perf_event__process_aux; 391 if (tool->itrace_start == NULL) 392 tool->itrace_start = perf_event__process_itrace_start; 393 if (tool->context_switch == NULL) 394 tool->context_switch = perf_event__process_switch; 395 if (tool->ksymbol == NULL) 396 tool->ksymbol = perf_event__process_ksymbol; 397 if (tool->bpf_event == NULL) 398 tool->bpf_event = perf_event__process_bpf_event; 399 if (tool->read == NULL) 400 tool->read = process_event_sample_stub; 401 if (tool->throttle == NULL) 402 tool->throttle = process_event_stub; 403 if (tool->unthrottle == NULL) 404 tool->unthrottle = process_event_stub; 405 if (tool->attr == NULL) 406 tool->attr = process_event_synth_attr_stub; 407 if (tool->event_update == NULL) 408 tool->event_update = process_event_synth_event_update_stub; 409 if (tool->tracing_data == NULL) 410 tool->tracing_data = process_event_synth_tracing_data_stub; 411 if (tool->build_id == NULL) 412 tool->build_id = process_event_op2_stub; 413 if (tool->finished_round == NULL) { 414 if (tool->ordered_events) 415 tool->finished_round = process_finished_round; 416 else 417 tool->finished_round = process_finished_round_stub; 418 } 419 if (tool->id_index == NULL) 420 tool->id_index = process_event_op2_stub; 421 if (tool->auxtrace_info == NULL) 422 tool->auxtrace_info = process_event_op2_stub; 423 if (tool->auxtrace == NULL) 424 tool->auxtrace = process_event_auxtrace_stub; 425 if (tool->auxtrace_error == NULL) 426 tool->auxtrace_error = process_event_op2_stub; 427 if (tool->thread_map == NULL) 428 tool->thread_map = process_event_thread_map_stub; 429 if (tool->cpu_map == NULL) 430 tool->cpu_map = process_event_cpu_map_stub; 431 if (tool->stat_config == NULL) 432 tool->stat_config = process_event_stat_config_stub; 433 if (tool->stat == NULL) 434 tool->stat = process_stat_stub; 435 if (tool->stat_round == NULL) 436 tool->stat_round = process_stat_round_stub; 437 if (tool->time_conv == NULL) 438 tool->time_conv = process_event_op2_stub; 439 if (tool->feature == NULL) 440 tool->feature = process_event_op2_stub; 441 if (tool->compressed == NULL) 442 tool->compressed = perf_session__process_compressed_event_stub; 443 } 444 445 static void swap_sample_id_all(union perf_event *event, void *data) 446 { 447 void *end = (void *) event + event->header.size; 448 int size = end - data; 449 450 BUG_ON(size % sizeof(u64)); 451 mem_bswap_64(data, size); 452 } 453 454 static void perf_event__all64_swap(union perf_event *event, 455 bool sample_id_all __maybe_unused) 456 { 457 struct perf_event_header *hdr = &event->header; 458 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 459 } 460 461 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 462 { 463 event->comm.pid = bswap_32(event->comm.pid); 464 event->comm.tid = bswap_32(event->comm.tid); 465 466 if (sample_id_all) { 467 void *data = &event->comm.comm; 468 469 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 470 swap_sample_id_all(event, data); 471 } 472 } 473 474 static void perf_event__mmap_swap(union perf_event *event, 475 bool sample_id_all) 476 { 477 event->mmap.pid = bswap_32(event->mmap.pid); 478 event->mmap.tid = bswap_32(event->mmap.tid); 479 event->mmap.start = bswap_64(event->mmap.start); 480 event->mmap.len = bswap_64(event->mmap.len); 481 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 482 483 if (sample_id_all) { 484 void *data = &event->mmap.filename; 485 486 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 487 swap_sample_id_all(event, data); 488 } 489 } 490 491 static void perf_event__mmap2_swap(union perf_event *event, 492 bool sample_id_all) 493 { 494 event->mmap2.pid = bswap_32(event->mmap2.pid); 495 event->mmap2.tid = bswap_32(event->mmap2.tid); 496 event->mmap2.start = bswap_64(event->mmap2.start); 497 event->mmap2.len = bswap_64(event->mmap2.len); 498 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); 499 event->mmap2.maj = bswap_32(event->mmap2.maj); 500 event->mmap2.min = bswap_32(event->mmap2.min); 501 event->mmap2.ino = bswap_64(event->mmap2.ino); 502 503 if (sample_id_all) { 504 void *data = &event->mmap2.filename; 505 506 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 507 swap_sample_id_all(event, data); 508 } 509 } 510 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 511 { 512 event->fork.pid = bswap_32(event->fork.pid); 513 event->fork.tid = bswap_32(event->fork.tid); 514 event->fork.ppid = bswap_32(event->fork.ppid); 515 event->fork.ptid = bswap_32(event->fork.ptid); 516 event->fork.time = bswap_64(event->fork.time); 517 518 if (sample_id_all) 519 swap_sample_id_all(event, &event->fork + 1); 520 } 521 522 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 523 { 524 event->read.pid = bswap_32(event->read.pid); 525 event->read.tid = bswap_32(event->read.tid); 526 event->read.value = bswap_64(event->read.value); 527 event->read.time_enabled = bswap_64(event->read.time_enabled); 528 event->read.time_running = bswap_64(event->read.time_running); 529 event->read.id = bswap_64(event->read.id); 530 531 if (sample_id_all) 532 swap_sample_id_all(event, &event->read + 1); 533 } 534 535 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all) 536 { 537 event->aux.aux_offset = bswap_64(event->aux.aux_offset); 538 event->aux.aux_size = bswap_64(event->aux.aux_size); 539 event->aux.flags = bswap_64(event->aux.flags); 540 541 if (sample_id_all) 542 swap_sample_id_all(event, &event->aux + 1); 543 } 544 545 static void perf_event__itrace_start_swap(union perf_event *event, 546 bool sample_id_all) 547 { 548 event->itrace_start.pid = bswap_32(event->itrace_start.pid); 549 event->itrace_start.tid = bswap_32(event->itrace_start.tid); 550 551 if (sample_id_all) 552 swap_sample_id_all(event, &event->itrace_start + 1); 553 } 554 555 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all) 556 { 557 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) { 558 event->context_switch.next_prev_pid = 559 bswap_32(event->context_switch.next_prev_pid); 560 event->context_switch.next_prev_tid = 561 bswap_32(event->context_switch.next_prev_tid); 562 } 563 564 if (sample_id_all) 565 swap_sample_id_all(event, &event->context_switch + 1); 566 } 567 568 static void perf_event__throttle_swap(union perf_event *event, 569 bool sample_id_all) 570 { 571 event->throttle.time = bswap_64(event->throttle.time); 572 event->throttle.id = bswap_64(event->throttle.id); 573 event->throttle.stream_id = bswap_64(event->throttle.stream_id); 574 575 if (sample_id_all) 576 swap_sample_id_all(event, &event->throttle + 1); 577 } 578 579 static u8 revbyte(u8 b) 580 { 581 int rev = (b >> 4) | ((b & 0xf) << 4); 582 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 583 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 584 return (u8) rev; 585 } 586 587 /* 588 * XXX this is hack in attempt to carry flags bitfield 589 * through endian village. ABI says: 590 * 591 * Bit-fields are allocated from right to left (least to most significant) 592 * on little-endian implementations and from left to right (most to least 593 * significant) on big-endian implementations. 594 * 595 * The above seems to be byte specific, so we need to reverse each 596 * byte of the bitfield. 'Internet' also says this might be implementation 597 * specific and we probably need proper fix and carry perf_event_attr 598 * bitfield flags in separate data file FEAT_ section. Thought this seems 599 * to work for now. 600 */ 601 static void swap_bitfield(u8 *p, unsigned len) 602 { 603 unsigned i; 604 605 for (i = 0; i < len; i++) { 606 *p = revbyte(*p); 607 p++; 608 } 609 } 610 611 /* exported for swapping attributes in file header */ 612 void perf_event__attr_swap(struct perf_event_attr *attr) 613 { 614 attr->type = bswap_32(attr->type); 615 attr->size = bswap_32(attr->size); 616 617 #define bswap_safe(f, n) \ 618 (attr->size > (offsetof(struct perf_event_attr, f) + \ 619 sizeof(attr->f) * (n))) 620 #define bswap_field(f, sz) \ 621 do { \ 622 if (bswap_safe(f, 0)) \ 623 attr->f = bswap_##sz(attr->f); \ 624 } while(0) 625 #define bswap_field_16(f) bswap_field(f, 16) 626 #define bswap_field_32(f) bswap_field(f, 32) 627 #define bswap_field_64(f) bswap_field(f, 64) 628 629 bswap_field_64(config); 630 bswap_field_64(sample_period); 631 bswap_field_64(sample_type); 632 bswap_field_64(read_format); 633 bswap_field_32(wakeup_events); 634 bswap_field_32(bp_type); 635 bswap_field_64(bp_addr); 636 bswap_field_64(bp_len); 637 bswap_field_64(branch_sample_type); 638 bswap_field_64(sample_regs_user); 639 bswap_field_32(sample_stack_user); 640 bswap_field_32(aux_watermark); 641 bswap_field_16(sample_max_stack); 642 643 /* 644 * After read_format are bitfields. Check read_format because 645 * we are unable to use offsetof on bitfield. 646 */ 647 if (bswap_safe(read_format, 1)) 648 swap_bitfield((u8 *) (&attr->read_format + 1), 649 sizeof(u64)); 650 #undef bswap_field_64 651 #undef bswap_field_32 652 #undef bswap_field 653 #undef bswap_safe 654 } 655 656 static void perf_event__hdr_attr_swap(union perf_event *event, 657 bool sample_id_all __maybe_unused) 658 { 659 size_t size; 660 661 perf_event__attr_swap(&event->attr.attr); 662 663 size = event->header.size; 664 size -= (void *)&event->attr.id - (void *)event; 665 mem_bswap_64(event->attr.id, size); 666 } 667 668 static void perf_event__event_update_swap(union perf_event *event, 669 bool sample_id_all __maybe_unused) 670 { 671 event->event_update.type = bswap_64(event->event_update.type); 672 event->event_update.id = bswap_64(event->event_update.id); 673 } 674 675 static void perf_event__event_type_swap(union perf_event *event, 676 bool sample_id_all __maybe_unused) 677 { 678 event->event_type.event_type.event_id = 679 bswap_64(event->event_type.event_type.event_id); 680 } 681 682 static void perf_event__tracing_data_swap(union perf_event *event, 683 bool sample_id_all __maybe_unused) 684 { 685 event->tracing_data.size = bswap_32(event->tracing_data.size); 686 } 687 688 static void perf_event__auxtrace_info_swap(union perf_event *event, 689 bool sample_id_all __maybe_unused) 690 { 691 size_t size; 692 693 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type); 694 695 size = event->header.size; 696 size -= (void *)&event->auxtrace_info.priv - (void *)event; 697 mem_bswap_64(event->auxtrace_info.priv, size); 698 } 699 700 static void perf_event__auxtrace_swap(union perf_event *event, 701 bool sample_id_all __maybe_unused) 702 { 703 event->auxtrace.size = bswap_64(event->auxtrace.size); 704 event->auxtrace.offset = bswap_64(event->auxtrace.offset); 705 event->auxtrace.reference = bswap_64(event->auxtrace.reference); 706 event->auxtrace.idx = bswap_32(event->auxtrace.idx); 707 event->auxtrace.tid = bswap_32(event->auxtrace.tid); 708 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu); 709 } 710 711 static void perf_event__auxtrace_error_swap(union perf_event *event, 712 bool sample_id_all __maybe_unused) 713 { 714 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type); 715 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code); 716 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu); 717 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid); 718 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid); 719 event->auxtrace_error.fmt = bswap_32(event->auxtrace_error.fmt); 720 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip); 721 if (event->auxtrace_error.fmt) 722 event->auxtrace_error.time = bswap_64(event->auxtrace_error.time); 723 } 724 725 static void perf_event__thread_map_swap(union perf_event *event, 726 bool sample_id_all __maybe_unused) 727 { 728 unsigned i; 729 730 event->thread_map.nr = bswap_64(event->thread_map.nr); 731 732 for (i = 0; i < event->thread_map.nr; i++) 733 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid); 734 } 735 736 static void perf_event__cpu_map_swap(union perf_event *event, 737 bool sample_id_all __maybe_unused) 738 { 739 struct cpu_map_data *data = &event->cpu_map.data; 740 struct cpu_map_entries *cpus; 741 struct cpu_map_mask *mask; 742 unsigned i; 743 744 data->type = bswap_64(data->type); 745 746 switch (data->type) { 747 case PERF_CPU_MAP__CPUS: 748 cpus = (struct cpu_map_entries *)data->data; 749 750 cpus->nr = bswap_16(cpus->nr); 751 752 for (i = 0; i < cpus->nr; i++) 753 cpus->cpu[i] = bswap_16(cpus->cpu[i]); 754 break; 755 case PERF_CPU_MAP__MASK: 756 mask = (struct cpu_map_mask *) data->data; 757 758 mask->nr = bswap_16(mask->nr); 759 mask->long_size = bswap_16(mask->long_size); 760 761 switch (mask->long_size) { 762 case 4: mem_bswap_32(&mask->mask, mask->nr); break; 763 case 8: mem_bswap_64(&mask->mask, mask->nr); break; 764 default: 765 pr_err("cpu_map swap: unsupported long size\n"); 766 } 767 default: 768 break; 769 } 770 } 771 772 static void perf_event__stat_config_swap(union perf_event *event, 773 bool sample_id_all __maybe_unused) 774 { 775 u64 size; 776 777 size = event->stat_config.nr * sizeof(event->stat_config.data[0]); 778 size += 1; /* nr item itself */ 779 mem_bswap_64(&event->stat_config.nr, size); 780 } 781 782 static void perf_event__stat_swap(union perf_event *event, 783 bool sample_id_all __maybe_unused) 784 { 785 event->stat.id = bswap_64(event->stat.id); 786 event->stat.thread = bswap_32(event->stat.thread); 787 event->stat.cpu = bswap_32(event->stat.cpu); 788 event->stat.val = bswap_64(event->stat.val); 789 event->stat.ena = bswap_64(event->stat.ena); 790 event->stat.run = bswap_64(event->stat.run); 791 } 792 793 static void perf_event__stat_round_swap(union perf_event *event, 794 bool sample_id_all __maybe_unused) 795 { 796 event->stat_round.type = bswap_64(event->stat_round.type); 797 event->stat_round.time = bswap_64(event->stat_round.time); 798 } 799 800 typedef void (*perf_event__swap_op)(union perf_event *event, 801 bool sample_id_all); 802 803 static perf_event__swap_op perf_event__swap_ops[] = { 804 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 805 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap, 806 [PERF_RECORD_COMM] = perf_event__comm_swap, 807 [PERF_RECORD_FORK] = perf_event__task_swap, 808 [PERF_RECORD_EXIT] = perf_event__task_swap, 809 [PERF_RECORD_LOST] = perf_event__all64_swap, 810 [PERF_RECORD_READ] = perf_event__read_swap, 811 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap, 812 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap, 813 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 814 [PERF_RECORD_AUX] = perf_event__aux_swap, 815 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap, 816 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap, 817 [PERF_RECORD_SWITCH] = perf_event__switch_swap, 818 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap, 819 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 820 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 821 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 822 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 823 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap, 824 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap, 825 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap, 826 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap, 827 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap, 828 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap, 829 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap, 830 [PERF_RECORD_STAT] = perf_event__stat_swap, 831 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap, 832 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap, 833 [PERF_RECORD_TIME_CONV] = perf_event__all64_swap, 834 [PERF_RECORD_HEADER_MAX] = NULL, 835 }; 836 837 /* 838 * When perf record finishes a pass on every buffers, it records this pseudo 839 * event. 840 * We record the max timestamp t found in the pass n. 841 * Assuming these timestamps are monotonic across cpus, we know that if 842 * a buffer still has events with timestamps below t, they will be all 843 * available and then read in the pass n + 1. 844 * Hence when we start to read the pass n + 2, we can safely flush every 845 * events with timestamps below t. 846 * 847 * ============ PASS n ================= 848 * CPU 0 | CPU 1 849 * | 850 * cnt1 timestamps | cnt2 timestamps 851 * 1 | 2 852 * 2 | 3 853 * - | 4 <--- max recorded 854 * 855 * ============ PASS n + 1 ============== 856 * CPU 0 | CPU 1 857 * | 858 * cnt1 timestamps | cnt2 timestamps 859 * 3 | 5 860 * 4 | 6 861 * 5 | 7 <---- max recorded 862 * 863 * Flush every events below timestamp 4 864 * 865 * ============ PASS n + 2 ============== 866 * CPU 0 | CPU 1 867 * | 868 * cnt1 timestamps | cnt2 timestamps 869 * 6 | 8 870 * 7 | 9 871 * - | 10 872 * 873 * Flush every events below timestamp 7 874 * etc... 875 */ 876 static int process_finished_round(struct perf_tool *tool __maybe_unused, 877 union perf_event *event __maybe_unused, 878 struct ordered_events *oe) 879 { 880 if (dump_trace) 881 fprintf(stdout, "\n"); 882 return ordered_events__flush(oe, OE_FLUSH__ROUND); 883 } 884 885 int perf_session__queue_event(struct perf_session *s, union perf_event *event, 886 u64 timestamp, u64 file_offset) 887 { 888 return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset); 889 } 890 891 static void callchain__lbr_callstack_printf(struct perf_sample *sample) 892 { 893 struct ip_callchain *callchain = sample->callchain; 894 struct branch_stack *lbr_stack = sample->branch_stack; 895 u64 kernel_callchain_nr = callchain->nr; 896 unsigned int i; 897 898 for (i = 0; i < kernel_callchain_nr; i++) { 899 if (callchain->ips[i] == PERF_CONTEXT_USER) 900 break; 901 } 902 903 if ((i != kernel_callchain_nr) && lbr_stack->nr) { 904 u64 total_nr; 905 /* 906 * LBR callstack can only get user call chain, 907 * i is kernel call chain number, 908 * 1 is PERF_CONTEXT_USER. 909 * 910 * The user call chain is stored in LBR registers. 911 * LBR are pair registers. The caller is stored 912 * in "from" register, while the callee is stored 913 * in "to" register. 914 * For example, there is a call stack 915 * "A"->"B"->"C"->"D". 916 * The LBR registers will recorde like 917 * "C"->"D", "B"->"C", "A"->"B". 918 * So only the first "to" register and all "from" 919 * registers are needed to construct the whole stack. 920 */ 921 total_nr = i + 1 + lbr_stack->nr + 1; 922 kernel_callchain_nr = i + 1; 923 924 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr); 925 926 for (i = 0; i < kernel_callchain_nr; i++) 927 printf("..... %2d: %016" PRIx64 "\n", 928 i, callchain->ips[i]); 929 930 printf("..... %2d: %016" PRIx64 "\n", 931 (int)(kernel_callchain_nr), lbr_stack->entries[0].to); 932 for (i = 0; i < lbr_stack->nr; i++) 933 printf("..... %2d: %016" PRIx64 "\n", 934 (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from); 935 } 936 } 937 938 static void callchain__printf(struct perf_evsel *evsel, 939 struct perf_sample *sample) 940 { 941 unsigned int i; 942 struct ip_callchain *callchain = sample->callchain; 943 944 if (perf_evsel__has_branch_callstack(evsel)) 945 callchain__lbr_callstack_printf(sample); 946 947 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr); 948 949 for (i = 0; i < callchain->nr; i++) 950 printf("..... %2d: %016" PRIx64 "\n", 951 i, callchain->ips[i]); 952 } 953 954 static void branch_stack__printf(struct perf_sample *sample) 955 { 956 uint64_t i; 957 958 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr); 959 960 for (i = 0; i < sample->branch_stack->nr; i++) { 961 struct branch_entry *e = &sample->branch_stack->entries[i]; 962 963 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n", 964 i, e->from, e->to, 965 (unsigned short)e->flags.cycles, 966 e->flags.mispred ? "M" : " ", 967 e->flags.predicted ? "P" : " ", 968 e->flags.abort ? "A" : " ", 969 e->flags.in_tx ? "T" : " ", 970 (unsigned)e->flags.reserved); 971 } 972 } 973 974 static void regs_dump__printf(u64 mask, u64 *regs) 975 { 976 unsigned rid, i = 0; 977 978 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { 979 u64 val = regs[i++]; 980 981 printf(".... %-5s 0x%" PRIx64 "\n", 982 perf_reg_name(rid), val); 983 } 984 } 985 986 static const char *regs_abi[] = { 987 [PERF_SAMPLE_REGS_ABI_NONE] = "none", 988 [PERF_SAMPLE_REGS_ABI_32] = "32-bit", 989 [PERF_SAMPLE_REGS_ABI_64] = "64-bit", 990 }; 991 992 static inline const char *regs_dump_abi(struct regs_dump *d) 993 { 994 if (d->abi > PERF_SAMPLE_REGS_ABI_64) 995 return "unknown"; 996 997 return regs_abi[d->abi]; 998 } 999 1000 static void regs__printf(const char *type, struct regs_dump *regs) 1001 { 1002 u64 mask = regs->mask; 1003 1004 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n", 1005 type, 1006 mask, 1007 regs_dump_abi(regs)); 1008 1009 regs_dump__printf(mask, regs->regs); 1010 } 1011 1012 static void regs_user__printf(struct perf_sample *sample) 1013 { 1014 struct regs_dump *user_regs = &sample->user_regs; 1015 1016 if (user_regs->regs) 1017 regs__printf("user", user_regs); 1018 } 1019 1020 static void regs_intr__printf(struct perf_sample *sample) 1021 { 1022 struct regs_dump *intr_regs = &sample->intr_regs; 1023 1024 if (intr_regs->regs) 1025 regs__printf("intr", intr_regs); 1026 } 1027 1028 static void stack_user__printf(struct stack_dump *dump) 1029 { 1030 printf("... ustack: size %" PRIu64 ", offset 0x%x\n", 1031 dump->size, dump->offset); 1032 } 1033 1034 static void perf_evlist__print_tstamp(struct perf_evlist *evlist, 1035 union perf_event *event, 1036 struct perf_sample *sample) 1037 { 1038 u64 sample_type = __perf_evlist__combined_sample_type(evlist); 1039 1040 if (event->header.type != PERF_RECORD_SAMPLE && 1041 !perf_evlist__sample_id_all(evlist)) { 1042 fputs("-1 -1 ", stdout); 1043 return; 1044 } 1045 1046 if ((sample_type & PERF_SAMPLE_CPU)) 1047 printf("%u ", sample->cpu); 1048 1049 if (sample_type & PERF_SAMPLE_TIME) 1050 printf("%" PRIu64 " ", sample->time); 1051 } 1052 1053 static void sample_read__printf(struct perf_sample *sample, u64 read_format) 1054 { 1055 printf("... sample_read:\n"); 1056 1057 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1058 printf("...... time enabled %016" PRIx64 "\n", 1059 sample->read.time_enabled); 1060 1061 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1062 printf("...... time running %016" PRIx64 "\n", 1063 sample->read.time_running); 1064 1065 if (read_format & PERF_FORMAT_GROUP) { 1066 u64 i; 1067 1068 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr); 1069 1070 for (i = 0; i < sample->read.group.nr; i++) { 1071 struct sample_read_value *value; 1072 1073 value = &sample->read.group.values[i]; 1074 printf("..... id %016" PRIx64 1075 ", value %016" PRIx64 "\n", 1076 value->id, value->value); 1077 } 1078 } else 1079 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n", 1080 sample->read.one.id, sample->read.one.value); 1081 } 1082 1083 static void dump_event(struct perf_evlist *evlist, union perf_event *event, 1084 u64 file_offset, struct perf_sample *sample) 1085 { 1086 if (!dump_trace) 1087 return; 1088 1089 printf("\n%#" PRIx64 " [%#x]: event: %d\n", 1090 file_offset, event->header.size, event->header.type); 1091 1092 trace_event(event); 1093 if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw) 1094 evlist->trace_event_sample_raw(evlist, event, sample); 1095 1096 if (sample) 1097 perf_evlist__print_tstamp(evlist, event, sample); 1098 1099 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 1100 event->header.size, perf_event__name(event->header.type)); 1101 } 1102 1103 static void dump_sample(struct perf_evsel *evsel, union perf_event *event, 1104 struct perf_sample *sample) 1105 { 1106 u64 sample_type; 1107 1108 if (!dump_trace) 1109 return; 1110 1111 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 1112 event->header.misc, sample->pid, sample->tid, sample->ip, 1113 sample->period, sample->addr); 1114 1115 sample_type = evsel->attr.sample_type; 1116 1117 if (evsel__has_callchain(evsel)) 1118 callchain__printf(evsel, sample); 1119 1120 if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !perf_evsel__has_branch_callstack(evsel)) 1121 branch_stack__printf(sample); 1122 1123 if (sample_type & PERF_SAMPLE_REGS_USER) 1124 regs_user__printf(sample); 1125 1126 if (sample_type & PERF_SAMPLE_REGS_INTR) 1127 regs_intr__printf(sample); 1128 1129 if (sample_type & PERF_SAMPLE_STACK_USER) 1130 stack_user__printf(&sample->user_stack); 1131 1132 if (sample_type & PERF_SAMPLE_WEIGHT) 1133 printf("... weight: %" PRIu64 "\n", sample->weight); 1134 1135 if (sample_type & PERF_SAMPLE_DATA_SRC) 1136 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src); 1137 1138 if (sample_type & PERF_SAMPLE_PHYS_ADDR) 1139 printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr); 1140 1141 if (sample_type & PERF_SAMPLE_TRANSACTION) 1142 printf("... transaction: %" PRIx64 "\n", sample->transaction); 1143 1144 if (sample_type & PERF_SAMPLE_READ) 1145 sample_read__printf(sample, evsel->attr.read_format); 1146 } 1147 1148 static void dump_read(struct perf_evsel *evsel, union perf_event *event) 1149 { 1150 struct read_event *read_event = &event->read; 1151 u64 read_format; 1152 1153 if (!dump_trace) 1154 return; 1155 1156 printf(": %d %d %s %" PRIu64 "\n", event->read.pid, event->read.tid, 1157 evsel ? perf_evsel__name(evsel) : "FAIL", 1158 event->read.value); 1159 1160 read_format = evsel->attr.read_format; 1161 1162 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1163 printf("... time enabled : %" PRIu64 "\n", read_event->time_enabled); 1164 1165 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1166 printf("... time running : %" PRIu64 "\n", read_event->time_running); 1167 1168 if (read_format & PERF_FORMAT_ID) 1169 printf("... id : %" PRIu64 "\n", read_event->id); 1170 } 1171 1172 static struct machine *machines__find_for_cpumode(struct machines *machines, 1173 union perf_event *event, 1174 struct perf_sample *sample) 1175 { 1176 struct machine *machine; 1177 1178 if (perf_guest && 1179 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 1180 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) { 1181 u32 pid; 1182 1183 if (event->header.type == PERF_RECORD_MMAP 1184 || event->header.type == PERF_RECORD_MMAP2) 1185 pid = event->mmap.pid; 1186 else 1187 pid = sample->pid; 1188 1189 machine = machines__find(machines, pid); 1190 if (!machine) 1191 machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID); 1192 return machine; 1193 } 1194 1195 return &machines->host; 1196 } 1197 1198 static int deliver_sample_value(struct perf_evlist *evlist, 1199 struct perf_tool *tool, 1200 union perf_event *event, 1201 struct perf_sample *sample, 1202 struct sample_read_value *v, 1203 struct machine *machine) 1204 { 1205 struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id); 1206 1207 if (sid) { 1208 sample->id = v->id; 1209 sample->period = v->value - sid->period; 1210 sid->period = v->value; 1211 } 1212 1213 if (!sid || sid->evsel == NULL) { 1214 ++evlist->stats.nr_unknown_id; 1215 return 0; 1216 } 1217 1218 /* 1219 * There's no reason to deliver sample 1220 * for zero period, bail out. 1221 */ 1222 if (!sample->period) 1223 return 0; 1224 1225 return tool->sample(tool, event, sample, sid->evsel, machine); 1226 } 1227 1228 static int deliver_sample_group(struct perf_evlist *evlist, 1229 struct perf_tool *tool, 1230 union perf_event *event, 1231 struct perf_sample *sample, 1232 struct machine *machine) 1233 { 1234 int ret = -EINVAL; 1235 u64 i; 1236 1237 for (i = 0; i < sample->read.group.nr; i++) { 1238 ret = deliver_sample_value(evlist, tool, event, sample, 1239 &sample->read.group.values[i], 1240 machine); 1241 if (ret) 1242 break; 1243 } 1244 1245 return ret; 1246 } 1247 1248 static int 1249 perf_evlist__deliver_sample(struct perf_evlist *evlist, 1250 struct perf_tool *tool, 1251 union perf_event *event, 1252 struct perf_sample *sample, 1253 struct perf_evsel *evsel, 1254 struct machine *machine) 1255 { 1256 /* We know evsel != NULL. */ 1257 u64 sample_type = evsel->attr.sample_type; 1258 u64 read_format = evsel->attr.read_format; 1259 1260 /* Standard sample delivery. */ 1261 if (!(sample_type & PERF_SAMPLE_READ)) 1262 return tool->sample(tool, event, sample, evsel, machine); 1263 1264 /* For PERF_SAMPLE_READ we have either single or group mode. */ 1265 if (read_format & PERF_FORMAT_GROUP) 1266 return deliver_sample_group(evlist, tool, event, sample, 1267 machine); 1268 else 1269 return deliver_sample_value(evlist, tool, event, sample, 1270 &sample->read.one, machine); 1271 } 1272 1273 static int machines__deliver_event(struct machines *machines, 1274 struct perf_evlist *evlist, 1275 union perf_event *event, 1276 struct perf_sample *sample, 1277 struct perf_tool *tool, u64 file_offset) 1278 { 1279 struct perf_evsel *evsel; 1280 struct machine *machine; 1281 1282 dump_event(evlist, event, file_offset, sample); 1283 1284 evsel = perf_evlist__id2evsel(evlist, sample->id); 1285 1286 machine = machines__find_for_cpumode(machines, event, sample); 1287 1288 switch (event->header.type) { 1289 case PERF_RECORD_SAMPLE: 1290 if (evsel == NULL) { 1291 ++evlist->stats.nr_unknown_id; 1292 return 0; 1293 } 1294 dump_sample(evsel, event, sample); 1295 if (machine == NULL) { 1296 ++evlist->stats.nr_unprocessable_samples; 1297 return 0; 1298 } 1299 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine); 1300 case PERF_RECORD_MMAP: 1301 return tool->mmap(tool, event, sample, machine); 1302 case PERF_RECORD_MMAP2: 1303 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT) 1304 ++evlist->stats.nr_proc_map_timeout; 1305 return tool->mmap2(tool, event, sample, machine); 1306 case PERF_RECORD_COMM: 1307 return tool->comm(tool, event, sample, machine); 1308 case PERF_RECORD_NAMESPACES: 1309 return tool->namespaces(tool, event, sample, machine); 1310 case PERF_RECORD_FORK: 1311 return tool->fork(tool, event, sample, machine); 1312 case PERF_RECORD_EXIT: 1313 return tool->exit(tool, event, sample, machine); 1314 case PERF_RECORD_LOST: 1315 if (tool->lost == perf_event__process_lost) 1316 evlist->stats.total_lost += event->lost.lost; 1317 return tool->lost(tool, event, sample, machine); 1318 case PERF_RECORD_LOST_SAMPLES: 1319 if (tool->lost_samples == perf_event__process_lost_samples) 1320 evlist->stats.total_lost_samples += event->lost_samples.lost; 1321 return tool->lost_samples(tool, event, sample, machine); 1322 case PERF_RECORD_READ: 1323 dump_read(evsel, event); 1324 return tool->read(tool, event, sample, evsel, machine); 1325 case PERF_RECORD_THROTTLE: 1326 return tool->throttle(tool, event, sample, machine); 1327 case PERF_RECORD_UNTHROTTLE: 1328 return tool->unthrottle(tool, event, sample, machine); 1329 case PERF_RECORD_AUX: 1330 if (tool->aux == perf_event__process_aux) { 1331 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) 1332 evlist->stats.total_aux_lost += 1; 1333 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL) 1334 evlist->stats.total_aux_partial += 1; 1335 } 1336 return tool->aux(tool, event, sample, machine); 1337 case PERF_RECORD_ITRACE_START: 1338 return tool->itrace_start(tool, event, sample, machine); 1339 case PERF_RECORD_SWITCH: 1340 case PERF_RECORD_SWITCH_CPU_WIDE: 1341 return tool->context_switch(tool, event, sample, machine); 1342 case PERF_RECORD_KSYMBOL: 1343 return tool->ksymbol(tool, event, sample, machine); 1344 case PERF_RECORD_BPF_EVENT: 1345 return tool->bpf_event(tool, event, sample, machine); 1346 default: 1347 ++evlist->stats.nr_unknown_events; 1348 return -1; 1349 } 1350 } 1351 1352 static int perf_session__deliver_event(struct perf_session *session, 1353 union perf_event *event, 1354 struct perf_tool *tool, 1355 u64 file_offset) 1356 { 1357 struct perf_sample sample; 1358 int ret; 1359 1360 ret = perf_evlist__parse_sample(session->evlist, event, &sample); 1361 if (ret) { 1362 pr_err("Can't parse sample, err = %d\n", ret); 1363 return ret; 1364 } 1365 1366 ret = auxtrace__process_event(session, event, &sample, tool); 1367 if (ret < 0) 1368 return ret; 1369 if (ret > 0) 1370 return 0; 1371 1372 return machines__deliver_event(&session->machines, session->evlist, 1373 event, &sample, tool, file_offset); 1374 } 1375 1376 static s64 perf_session__process_user_event(struct perf_session *session, 1377 union perf_event *event, 1378 u64 file_offset) 1379 { 1380 struct ordered_events *oe = &session->ordered_events; 1381 struct perf_tool *tool = session->tool; 1382 struct perf_sample sample = { .time = 0, }; 1383 int fd = perf_data__fd(session->data); 1384 int err; 1385 1386 if (event->header.type != PERF_RECORD_COMPRESSED || 1387 tool->compressed == perf_session__process_compressed_event_stub) 1388 dump_event(session->evlist, event, file_offset, &sample); 1389 1390 /* These events are processed right away */ 1391 switch (event->header.type) { 1392 case PERF_RECORD_HEADER_ATTR: 1393 err = tool->attr(tool, event, &session->evlist); 1394 if (err == 0) { 1395 perf_session__set_id_hdr_size(session); 1396 perf_session__set_comm_exec(session); 1397 } 1398 return err; 1399 case PERF_RECORD_EVENT_UPDATE: 1400 return tool->event_update(tool, event, &session->evlist); 1401 case PERF_RECORD_HEADER_EVENT_TYPE: 1402 /* 1403 * Depreceated, but we need to handle it for sake 1404 * of old data files create in pipe mode. 1405 */ 1406 return 0; 1407 case PERF_RECORD_HEADER_TRACING_DATA: 1408 /* setup for reading amidst mmap */ 1409 lseek(fd, file_offset, SEEK_SET); 1410 return tool->tracing_data(session, event); 1411 case PERF_RECORD_HEADER_BUILD_ID: 1412 return tool->build_id(session, event); 1413 case PERF_RECORD_FINISHED_ROUND: 1414 return tool->finished_round(tool, event, oe); 1415 case PERF_RECORD_ID_INDEX: 1416 return tool->id_index(session, event); 1417 case PERF_RECORD_AUXTRACE_INFO: 1418 return tool->auxtrace_info(session, event); 1419 case PERF_RECORD_AUXTRACE: 1420 /* setup for reading amidst mmap */ 1421 lseek(fd, file_offset + event->header.size, SEEK_SET); 1422 return tool->auxtrace(session, event); 1423 case PERF_RECORD_AUXTRACE_ERROR: 1424 perf_session__auxtrace_error_inc(session, event); 1425 return tool->auxtrace_error(session, event); 1426 case PERF_RECORD_THREAD_MAP: 1427 return tool->thread_map(session, event); 1428 case PERF_RECORD_CPU_MAP: 1429 return tool->cpu_map(session, event); 1430 case PERF_RECORD_STAT_CONFIG: 1431 return tool->stat_config(session, event); 1432 case PERF_RECORD_STAT: 1433 return tool->stat(session, event); 1434 case PERF_RECORD_STAT_ROUND: 1435 return tool->stat_round(session, event); 1436 case PERF_RECORD_TIME_CONV: 1437 session->time_conv = event->time_conv; 1438 return tool->time_conv(session, event); 1439 case PERF_RECORD_HEADER_FEATURE: 1440 return tool->feature(session, event); 1441 case PERF_RECORD_COMPRESSED: 1442 err = tool->compressed(session, event, file_offset); 1443 if (err) 1444 dump_event(session->evlist, event, file_offset, &sample); 1445 return err; 1446 default: 1447 return -EINVAL; 1448 } 1449 } 1450 1451 int perf_session__deliver_synth_event(struct perf_session *session, 1452 union perf_event *event, 1453 struct perf_sample *sample) 1454 { 1455 struct perf_evlist *evlist = session->evlist; 1456 struct perf_tool *tool = session->tool; 1457 1458 events_stats__inc(&evlist->stats, event->header.type); 1459 1460 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1461 return perf_session__process_user_event(session, event, 0); 1462 1463 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0); 1464 } 1465 1466 static void event_swap(union perf_event *event, bool sample_id_all) 1467 { 1468 perf_event__swap_op swap; 1469 1470 swap = perf_event__swap_ops[event->header.type]; 1471 if (swap) 1472 swap(event, sample_id_all); 1473 } 1474 1475 int perf_session__peek_event(struct perf_session *session, off_t file_offset, 1476 void *buf, size_t buf_sz, 1477 union perf_event **event_ptr, 1478 struct perf_sample *sample) 1479 { 1480 union perf_event *event; 1481 size_t hdr_sz, rest; 1482 int fd; 1483 1484 if (session->one_mmap && !session->header.needs_swap) { 1485 event = file_offset - session->one_mmap_offset + 1486 session->one_mmap_addr; 1487 goto out_parse_sample; 1488 } 1489 1490 if (perf_data__is_pipe(session->data)) 1491 return -1; 1492 1493 fd = perf_data__fd(session->data); 1494 hdr_sz = sizeof(struct perf_event_header); 1495 1496 if (buf_sz < hdr_sz) 1497 return -1; 1498 1499 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 || 1500 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz) 1501 return -1; 1502 1503 event = (union perf_event *)buf; 1504 1505 if (session->header.needs_swap) 1506 perf_event_header__bswap(&event->header); 1507 1508 if (event->header.size < hdr_sz || event->header.size > buf_sz) 1509 return -1; 1510 1511 rest = event->header.size - hdr_sz; 1512 1513 if (readn(fd, buf, rest) != (ssize_t)rest) 1514 return -1; 1515 1516 if (session->header.needs_swap) 1517 event_swap(event, perf_evlist__sample_id_all(session->evlist)); 1518 1519 out_parse_sample: 1520 1521 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START && 1522 perf_evlist__parse_sample(session->evlist, event, sample)) 1523 return -1; 1524 1525 *event_ptr = event; 1526 1527 return 0; 1528 } 1529 1530 static s64 perf_session__process_event(struct perf_session *session, 1531 union perf_event *event, u64 file_offset) 1532 { 1533 struct perf_evlist *evlist = session->evlist; 1534 struct perf_tool *tool = session->tool; 1535 int ret; 1536 1537 if (session->header.needs_swap) 1538 event_swap(event, perf_evlist__sample_id_all(evlist)); 1539 1540 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1541 return -EINVAL; 1542 1543 events_stats__inc(&evlist->stats, event->header.type); 1544 1545 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1546 return perf_session__process_user_event(session, event, file_offset); 1547 1548 if (tool->ordered_events) { 1549 u64 timestamp = -1ULL; 1550 1551 ret = perf_evlist__parse_sample_timestamp(evlist, event, ×tamp); 1552 if (ret && ret != -1) 1553 return ret; 1554 1555 ret = perf_session__queue_event(session, event, timestamp, file_offset); 1556 if (ret != -ETIME) 1557 return ret; 1558 } 1559 1560 return perf_session__deliver_event(session, event, tool, file_offset); 1561 } 1562 1563 void perf_event_header__bswap(struct perf_event_header *hdr) 1564 { 1565 hdr->type = bswap_32(hdr->type); 1566 hdr->misc = bswap_16(hdr->misc); 1567 hdr->size = bswap_16(hdr->size); 1568 } 1569 1570 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1571 { 1572 return machine__findnew_thread(&session->machines.host, -1, pid); 1573 } 1574 1575 /* 1576 * Threads are identified by pid and tid, and the idle task has pid == tid == 0. 1577 * So here a single thread is created for that, but actually there is a separate 1578 * idle task per cpu, so there should be one 'struct thread' per cpu, but there 1579 * is only 1. That causes problems for some tools, requiring workarounds. For 1580 * example get_idle_thread() in builtin-sched.c, or thread_stack__per_cpu(). 1581 */ 1582 int perf_session__register_idle_thread(struct perf_session *session) 1583 { 1584 struct thread *thread; 1585 int err = 0; 1586 1587 thread = machine__findnew_thread(&session->machines.host, 0, 0); 1588 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) { 1589 pr_err("problem inserting idle task.\n"); 1590 err = -1; 1591 } 1592 1593 if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) { 1594 pr_err("problem inserting idle task.\n"); 1595 err = -1; 1596 } 1597 1598 /* machine__findnew_thread() got the thread, so put it */ 1599 thread__put(thread); 1600 return err; 1601 } 1602 1603 static void 1604 perf_session__warn_order(const struct perf_session *session) 1605 { 1606 const struct ordered_events *oe = &session->ordered_events; 1607 struct perf_evsel *evsel; 1608 bool should_warn = true; 1609 1610 evlist__for_each_entry(session->evlist, evsel) { 1611 if (evsel->attr.write_backward) 1612 should_warn = false; 1613 } 1614 1615 if (!should_warn) 1616 return; 1617 if (oe->nr_unordered_events != 0) 1618 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events); 1619 } 1620 1621 static void perf_session__warn_about_errors(const struct perf_session *session) 1622 { 1623 const struct events_stats *stats = &session->evlist->stats; 1624 1625 if (session->tool->lost == perf_event__process_lost && 1626 stats->nr_events[PERF_RECORD_LOST] != 0) { 1627 ui__warning("Processed %d events and lost %d chunks!\n\n" 1628 "Check IO/CPU overload!\n\n", 1629 stats->nr_events[0], 1630 stats->nr_events[PERF_RECORD_LOST]); 1631 } 1632 1633 if (session->tool->lost_samples == perf_event__process_lost_samples) { 1634 double drop_rate; 1635 1636 drop_rate = (double)stats->total_lost_samples / 1637 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples); 1638 if (drop_rate > 0.05) { 1639 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n", 1640 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples, 1641 drop_rate * 100.0); 1642 } 1643 } 1644 1645 if (session->tool->aux == perf_event__process_aux && 1646 stats->total_aux_lost != 0) { 1647 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n", 1648 stats->total_aux_lost, 1649 stats->nr_events[PERF_RECORD_AUX]); 1650 } 1651 1652 if (session->tool->aux == perf_event__process_aux && 1653 stats->total_aux_partial != 0) { 1654 bool vmm_exclusive = false; 1655 1656 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive", 1657 &vmm_exclusive); 1658 1659 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n" 1660 "Are you running a KVM guest in the background?%s\n\n", 1661 stats->total_aux_partial, 1662 stats->nr_events[PERF_RECORD_AUX], 1663 vmm_exclusive ? 1664 "\nReloading kvm_intel module with vmm_exclusive=0\n" 1665 "will reduce the gaps to only guest's timeslices." : 1666 ""); 1667 } 1668 1669 if (stats->nr_unknown_events != 0) { 1670 ui__warning("Found %u unknown events!\n\n" 1671 "Is this an older tool processing a perf.data " 1672 "file generated by a more recent tool?\n\n" 1673 "If that is not the case, consider " 1674 "reporting to linux-kernel@vger.kernel.org.\n\n", 1675 stats->nr_unknown_events); 1676 } 1677 1678 if (stats->nr_unknown_id != 0) { 1679 ui__warning("%u samples with id not present in the header\n", 1680 stats->nr_unknown_id); 1681 } 1682 1683 if (stats->nr_invalid_chains != 0) { 1684 ui__warning("Found invalid callchains!\n\n" 1685 "%u out of %u events were discarded for this reason.\n\n" 1686 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1687 stats->nr_invalid_chains, 1688 stats->nr_events[PERF_RECORD_SAMPLE]); 1689 } 1690 1691 if (stats->nr_unprocessable_samples != 0) { 1692 ui__warning("%u unprocessable samples recorded.\n" 1693 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1694 stats->nr_unprocessable_samples); 1695 } 1696 1697 perf_session__warn_order(session); 1698 1699 events_stats__auxtrace_error_warn(stats); 1700 1701 if (stats->nr_proc_map_timeout != 0) { 1702 ui__warning("%d map information files for pre-existing threads were\n" 1703 "not processed, if there are samples for addresses they\n" 1704 "will not be resolved, you may find out which are these\n" 1705 "threads by running with -v and redirecting the output\n" 1706 "to a file.\n" 1707 "The time limit to process proc map is too short?\n" 1708 "Increase it by --proc-map-timeout\n", 1709 stats->nr_proc_map_timeout); 1710 } 1711 } 1712 1713 static int perf_session__flush_thread_stack(struct thread *thread, 1714 void *p __maybe_unused) 1715 { 1716 return thread_stack__flush(thread); 1717 } 1718 1719 static int perf_session__flush_thread_stacks(struct perf_session *session) 1720 { 1721 return machines__for_each_thread(&session->machines, 1722 perf_session__flush_thread_stack, 1723 NULL); 1724 } 1725 1726 volatile int session_done; 1727 1728 static int __perf_session__process_pipe_events(struct perf_session *session) 1729 { 1730 struct ordered_events *oe = &session->ordered_events; 1731 struct perf_tool *tool = session->tool; 1732 int fd = perf_data__fd(session->data); 1733 union perf_event *event; 1734 uint32_t size, cur_size = 0; 1735 void *buf = NULL; 1736 s64 skip = 0; 1737 u64 head; 1738 ssize_t err; 1739 void *p; 1740 1741 perf_tool__fill_defaults(tool); 1742 1743 head = 0; 1744 cur_size = sizeof(union perf_event); 1745 1746 buf = malloc(cur_size); 1747 if (!buf) 1748 return -errno; 1749 ordered_events__set_copy_on_queue(oe, true); 1750 more: 1751 event = buf; 1752 err = readn(fd, event, sizeof(struct perf_event_header)); 1753 if (err <= 0) { 1754 if (err == 0) 1755 goto done; 1756 1757 pr_err("failed to read event header\n"); 1758 goto out_err; 1759 } 1760 1761 if (session->header.needs_swap) 1762 perf_event_header__bswap(&event->header); 1763 1764 size = event->header.size; 1765 if (size < sizeof(struct perf_event_header)) { 1766 pr_err("bad event header size\n"); 1767 goto out_err; 1768 } 1769 1770 if (size > cur_size) { 1771 void *new = realloc(buf, size); 1772 if (!new) { 1773 pr_err("failed to allocate memory to read event\n"); 1774 goto out_err; 1775 } 1776 buf = new; 1777 cur_size = size; 1778 event = buf; 1779 } 1780 p = event; 1781 p += sizeof(struct perf_event_header); 1782 1783 if (size - sizeof(struct perf_event_header)) { 1784 err = readn(fd, p, size - sizeof(struct perf_event_header)); 1785 if (err <= 0) { 1786 if (err == 0) { 1787 pr_err("unexpected end of event stream\n"); 1788 goto done; 1789 } 1790 1791 pr_err("failed to read event data\n"); 1792 goto out_err; 1793 } 1794 } 1795 1796 if ((skip = perf_session__process_event(session, event, head)) < 0) { 1797 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1798 head, event->header.size, event->header.type); 1799 err = -EINVAL; 1800 goto out_err; 1801 } 1802 1803 head += size; 1804 1805 if (skip > 0) 1806 head += skip; 1807 1808 if (!session_done()) 1809 goto more; 1810 done: 1811 /* do the final flush for ordered samples */ 1812 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 1813 if (err) 1814 goto out_err; 1815 err = auxtrace__flush_events(session, tool); 1816 if (err) 1817 goto out_err; 1818 err = perf_session__flush_thread_stacks(session); 1819 out_err: 1820 free(buf); 1821 if (!tool->no_warn) 1822 perf_session__warn_about_errors(session); 1823 ordered_events__free(&session->ordered_events); 1824 auxtrace__free_events(session); 1825 return err; 1826 } 1827 1828 static union perf_event * 1829 fetch_mmaped_event(struct perf_session *session, 1830 u64 head, size_t mmap_size, char *buf) 1831 { 1832 union perf_event *event; 1833 1834 /* 1835 * Ensure we have enough space remaining to read 1836 * the size of the event in the headers. 1837 */ 1838 if (head + sizeof(event->header) > mmap_size) 1839 return NULL; 1840 1841 event = (union perf_event *)(buf + head); 1842 1843 if (session->header.needs_swap) 1844 perf_event_header__bswap(&event->header); 1845 1846 if (head + event->header.size > mmap_size) { 1847 /* We're not fetching the event so swap back again */ 1848 if (session->header.needs_swap) 1849 perf_event_header__bswap(&event->header); 1850 return NULL; 1851 } 1852 1853 return event; 1854 } 1855 1856 /* 1857 * On 64bit we can mmap the data file in one go. No need for tiny mmap 1858 * slices. On 32bit we use 32MB. 1859 */ 1860 #if BITS_PER_LONG == 64 1861 #define MMAP_SIZE ULLONG_MAX 1862 #define NUM_MMAPS 1 1863 #else 1864 #define MMAP_SIZE (32 * 1024 * 1024ULL) 1865 #define NUM_MMAPS 128 1866 #endif 1867 1868 struct reader; 1869 1870 typedef s64 (*reader_cb_t)(struct perf_session *session, 1871 union perf_event *event, 1872 u64 file_offset); 1873 1874 struct reader { 1875 int fd; 1876 u64 data_size; 1877 u64 data_offset; 1878 reader_cb_t process; 1879 }; 1880 1881 static int 1882 reader__process_events(struct reader *rd, struct perf_session *session, 1883 struct ui_progress *prog) 1884 { 1885 u64 data_size = rd->data_size; 1886 u64 head, page_offset, file_offset, file_pos, size; 1887 int err = 0, mmap_prot, mmap_flags, map_idx = 0; 1888 size_t mmap_size; 1889 char *buf, *mmaps[NUM_MMAPS]; 1890 union perf_event *event; 1891 s64 skip; 1892 1893 page_offset = page_size * (rd->data_offset / page_size); 1894 file_offset = page_offset; 1895 head = rd->data_offset - page_offset; 1896 1897 ui_progress__init_size(prog, data_size, "Processing events..."); 1898 1899 data_size += rd->data_offset; 1900 1901 mmap_size = MMAP_SIZE; 1902 if (mmap_size > data_size) { 1903 mmap_size = data_size; 1904 session->one_mmap = true; 1905 } 1906 1907 memset(mmaps, 0, sizeof(mmaps)); 1908 1909 mmap_prot = PROT_READ; 1910 mmap_flags = MAP_SHARED; 1911 1912 if (session->header.needs_swap) { 1913 mmap_prot |= PROT_WRITE; 1914 mmap_flags = MAP_PRIVATE; 1915 } 1916 remap: 1917 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, rd->fd, 1918 file_offset); 1919 if (buf == MAP_FAILED) { 1920 pr_err("failed to mmap file\n"); 1921 err = -errno; 1922 goto out; 1923 } 1924 mmaps[map_idx] = buf; 1925 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 1926 file_pos = file_offset + head; 1927 if (session->one_mmap) { 1928 session->one_mmap_addr = buf; 1929 session->one_mmap_offset = file_offset; 1930 } 1931 1932 more: 1933 event = fetch_mmaped_event(session, head, mmap_size, buf); 1934 if (!event) { 1935 if (mmaps[map_idx]) { 1936 munmap(mmaps[map_idx], mmap_size); 1937 mmaps[map_idx] = NULL; 1938 } 1939 1940 page_offset = page_size * (head / page_size); 1941 file_offset += page_offset; 1942 head -= page_offset; 1943 goto remap; 1944 } 1945 1946 size = event->header.size; 1947 1948 skip = -EINVAL; 1949 1950 if (size < sizeof(struct perf_event_header) || 1951 (skip = rd->process(session, event, file_pos)) < 0) { 1952 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n", 1953 file_offset + head, event->header.size, 1954 event->header.type, strerror(-skip)); 1955 err = skip; 1956 goto out; 1957 } 1958 1959 if (skip) 1960 size += skip; 1961 1962 head += size; 1963 file_pos += size; 1964 1965 ui_progress__update(prog, size); 1966 1967 if (session_done()) 1968 goto out; 1969 1970 if (file_pos < data_size) 1971 goto more; 1972 1973 out: 1974 return err; 1975 } 1976 1977 static s64 process_simple(struct perf_session *session, 1978 union perf_event *event, 1979 u64 file_offset) 1980 { 1981 return perf_session__process_event(session, event, file_offset); 1982 } 1983 1984 static int __perf_session__process_events(struct perf_session *session) 1985 { 1986 struct reader rd = { 1987 .fd = perf_data__fd(session->data), 1988 .data_size = session->header.data_size, 1989 .data_offset = session->header.data_offset, 1990 .process = process_simple, 1991 }; 1992 struct ordered_events *oe = &session->ordered_events; 1993 struct perf_tool *tool = session->tool; 1994 struct ui_progress prog; 1995 int err; 1996 1997 perf_tool__fill_defaults(tool); 1998 1999 if (rd.data_size == 0) 2000 return -1; 2001 2002 ui_progress__init_size(&prog, rd.data_size, "Processing events..."); 2003 2004 err = reader__process_events(&rd, session, &prog); 2005 if (err) 2006 goto out_err; 2007 /* do the final flush for ordered samples */ 2008 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 2009 if (err) 2010 goto out_err; 2011 err = auxtrace__flush_events(session, tool); 2012 if (err) 2013 goto out_err; 2014 err = perf_session__flush_thread_stacks(session); 2015 out_err: 2016 ui_progress__finish(); 2017 if (!tool->no_warn) 2018 perf_session__warn_about_errors(session); 2019 /* 2020 * We may switching perf.data output, make ordered_events 2021 * reusable. 2022 */ 2023 ordered_events__reinit(&session->ordered_events); 2024 auxtrace__free_events(session); 2025 session->one_mmap = false; 2026 return err; 2027 } 2028 2029 int perf_session__process_events(struct perf_session *session) 2030 { 2031 if (perf_session__register_idle_thread(session) < 0) 2032 return -ENOMEM; 2033 2034 if (perf_data__is_pipe(session->data)) 2035 return __perf_session__process_pipe_events(session); 2036 2037 return __perf_session__process_events(session); 2038 } 2039 2040 bool perf_session__has_traces(struct perf_session *session, const char *msg) 2041 { 2042 struct perf_evsel *evsel; 2043 2044 evlist__for_each_entry(session->evlist, evsel) { 2045 if (evsel->attr.type == PERF_TYPE_TRACEPOINT) 2046 return true; 2047 } 2048 2049 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 2050 return false; 2051 } 2052 2053 int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr) 2054 { 2055 char *bracket; 2056 struct ref_reloc_sym *ref; 2057 struct kmap *kmap; 2058 2059 ref = zalloc(sizeof(struct ref_reloc_sym)); 2060 if (ref == NULL) 2061 return -ENOMEM; 2062 2063 ref->name = strdup(symbol_name); 2064 if (ref->name == NULL) { 2065 free(ref); 2066 return -ENOMEM; 2067 } 2068 2069 bracket = strchr(ref->name, ']'); 2070 if (bracket) 2071 *bracket = '\0'; 2072 2073 ref->addr = addr; 2074 2075 kmap = map__kmap(map); 2076 if (kmap) 2077 kmap->ref_reloc_sym = ref; 2078 2079 return 0; 2080 } 2081 2082 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp) 2083 { 2084 return machines__fprintf_dsos(&session->machines, fp); 2085 } 2086 2087 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp, 2088 bool (skip)(struct dso *dso, int parm), int parm) 2089 { 2090 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm); 2091 } 2092 2093 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 2094 { 2095 size_t ret; 2096 const char *msg = ""; 2097 2098 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE)) 2099 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)"; 2100 2101 ret = fprintf(fp, "\nAggregated stats:%s\n", msg); 2102 2103 ret += events_stats__fprintf(&session->evlist->stats, fp); 2104 return ret; 2105 } 2106 2107 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 2108 { 2109 /* 2110 * FIXME: Here we have to actually print all the machines in this 2111 * session, not just the host... 2112 */ 2113 return machine__fprintf(&session->machines.host, fp); 2114 } 2115 2116 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, 2117 unsigned int type) 2118 { 2119 struct perf_evsel *pos; 2120 2121 evlist__for_each_entry(session->evlist, pos) { 2122 if (pos->attr.type == type) 2123 return pos; 2124 } 2125 return NULL; 2126 } 2127 2128 int perf_session__cpu_bitmap(struct perf_session *session, 2129 const char *cpu_list, unsigned long *cpu_bitmap) 2130 { 2131 int i, err = -1; 2132 struct cpu_map *map; 2133 2134 for (i = 0; i < PERF_TYPE_MAX; ++i) { 2135 struct perf_evsel *evsel; 2136 2137 evsel = perf_session__find_first_evtype(session, i); 2138 if (!evsel) 2139 continue; 2140 2141 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) { 2142 pr_err("File does not contain CPU events. " 2143 "Remove -C option to proceed.\n"); 2144 return -1; 2145 } 2146 } 2147 2148 map = cpu_map__new(cpu_list); 2149 if (map == NULL) { 2150 pr_err("Invalid cpu_list\n"); 2151 return -1; 2152 } 2153 2154 for (i = 0; i < map->nr; i++) { 2155 int cpu = map->map[i]; 2156 2157 if (cpu >= MAX_NR_CPUS) { 2158 pr_err("Requested CPU %d too large. " 2159 "Consider raising MAX_NR_CPUS\n", cpu); 2160 goto out_delete_map; 2161 } 2162 2163 set_bit(cpu, cpu_bitmap); 2164 } 2165 2166 err = 0; 2167 2168 out_delete_map: 2169 cpu_map__put(map); 2170 return err; 2171 } 2172 2173 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 2174 bool full) 2175 { 2176 if (session == NULL || fp == NULL) 2177 return; 2178 2179 fprintf(fp, "# ========\n"); 2180 perf_header__fprintf_info(session, fp, full); 2181 fprintf(fp, "# ========\n#\n"); 2182 } 2183 2184 2185 int __perf_session__set_tracepoints_handlers(struct perf_session *session, 2186 const struct perf_evsel_str_handler *assocs, 2187 size_t nr_assocs) 2188 { 2189 struct perf_evsel *evsel; 2190 size_t i; 2191 int err; 2192 2193 for (i = 0; i < nr_assocs; i++) { 2194 /* 2195 * Adding a handler for an event not in the session, 2196 * just ignore it. 2197 */ 2198 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name); 2199 if (evsel == NULL) 2200 continue; 2201 2202 err = -EEXIST; 2203 if (evsel->handler != NULL) 2204 goto out; 2205 evsel->handler = assocs[i].handler; 2206 } 2207 2208 err = 0; 2209 out: 2210 return err; 2211 } 2212 2213 int perf_event__process_id_index(struct perf_session *session, 2214 union perf_event *event) 2215 { 2216 struct perf_evlist *evlist = session->evlist; 2217 struct id_index_event *ie = &event->id_index; 2218 size_t i, nr, max_nr; 2219 2220 max_nr = (ie->header.size - sizeof(struct id_index_event)) / 2221 sizeof(struct id_index_entry); 2222 nr = ie->nr; 2223 if (nr > max_nr) 2224 return -EINVAL; 2225 2226 if (dump_trace) 2227 fprintf(stdout, " nr: %zu\n", nr); 2228 2229 for (i = 0; i < nr; i++) { 2230 struct id_index_entry *e = &ie->entries[i]; 2231 struct perf_sample_id *sid; 2232 2233 if (dump_trace) { 2234 fprintf(stdout, " ... id: %"PRIu64, e->id); 2235 fprintf(stdout, " idx: %"PRIu64, e->idx); 2236 fprintf(stdout, " cpu: %"PRId64, e->cpu); 2237 fprintf(stdout, " tid: %"PRId64"\n", e->tid); 2238 } 2239 2240 sid = perf_evlist__id2sid(evlist, e->id); 2241 if (!sid) 2242 return -ENOENT; 2243 sid->idx = e->idx; 2244 sid->cpu = e->cpu; 2245 sid->tid = e->tid; 2246 } 2247 return 0; 2248 } 2249 2250 int perf_event__synthesize_id_index(struct perf_tool *tool, 2251 perf_event__handler_t process, 2252 struct perf_evlist *evlist, 2253 struct machine *machine) 2254 { 2255 union perf_event *ev; 2256 struct perf_evsel *evsel; 2257 size_t nr = 0, i = 0, sz, max_nr, n; 2258 int err; 2259 2260 pr_debug2("Synthesizing id index\n"); 2261 2262 max_nr = (UINT16_MAX - sizeof(struct id_index_event)) / 2263 sizeof(struct id_index_entry); 2264 2265 evlist__for_each_entry(evlist, evsel) 2266 nr += evsel->ids; 2267 2268 n = nr > max_nr ? max_nr : nr; 2269 sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry); 2270 ev = zalloc(sz); 2271 if (!ev) 2272 return -ENOMEM; 2273 2274 ev->id_index.header.type = PERF_RECORD_ID_INDEX; 2275 ev->id_index.header.size = sz; 2276 ev->id_index.nr = n; 2277 2278 evlist__for_each_entry(evlist, evsel) { 2279 u32 j; 2280 2281 for (j = 0; j < evsel->ids; j++) { 2282 struct id_index_entry *e; 2283 struct perf_sample_id *sid; 2284 2285 if (i >= n) { 2286 err = process(tool, ev, NULL, machine); 2287 if (err) 2288 goto out_err; 2289 nr -= n; 2290 i = 0; 2291 } 2292 2293 e = &ev->id_index.entries[i++]; 2294 2295 e->id = evsel->id[j]; 2296 2297 sid = perf_evlist__id2sid(evlist, e->id); 2298 if (!sid) { 2299 free(ev); 2300 return -ENOENT; 2301 } 2302 2303 e->idx = sid->idx; 2304 e->cpu = sid->cpu; 2305 e->tid = sid->tid; 2306 } 2307 } 2308 2309 sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry); 2310 ev->id_index.header.size = sz; 2311 ev->id_index.nr = nr; 2312 2313 err = process(tool, ev, NULL, machine); 2314 out_err: 2315 free(ev); 2316 2317 return err; 2318 } 2319