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