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