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