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->fork == NULL) 378 tool->fork = process_event_stub; 379 if (tool->exit == NULL) 380 tool->exit = process_event_stub; 381 if (tool->lost == NULL) 382 tool->lost = perf_event__process_lost; 383 if (tool->lost_samples == NULL) 384 tool->lost_samples = perf_event__process_lost_samples; 385 if (tool->aux == NULL) 386 tool->aux = perf_event__process_aux; 387 if (tool->itrace_start == NULL) 388 tool->itrace_start = perf_event__process_itrace_start; 389 if (tool->context_switch == NULL) 390 tool->context_switch = perf_event__process_switch; 391 if (tool->read == NULL) 392 tool->read = process_event_sample_stub; 393 if (tool->throttle == NULL) 394 tool->throttle = process_event_stub; 395 if (tool->unthrottle == NULL) 396 tool->unthrottle = process_event_stub; 397 if (tool->attr == NULL) 398 tool->attr = process_event_synth_attr_stub; 399 if (tool->event_update == NULL) 400 tool->event_update = process_event_synth_event_update_stub; 401 if (tool->tracing_data == NULL) 402 tool->tracing_data = process_event_synth_tracing_data_stub; 403 if (tool->build_id == NULL) 404 tool->build_id = process_event_op2_stub; 405 if (tool->finished_round == NULL) { 406 if (tool->ordered_events) 407 tool->finished_round = process_finished_round; 408 else 409 tool->finished_round = process_finished_round_stub; 410 } 411 if (tool->id_index == NULL) 412 tool->id_index = process_event_op2_stub; 413 if (tool->auxtrace_info == NULL) 414 tool->auxtrace_info = process_event_op2_stub; 415 if (tool->auxtrace == NULL) 416 tool->auxtrace = process_event_auxtrace_stub; 417 if (tool->auxtrace_error == NULL) 418 tool->auxtrace_error = process_event_op2_stub; 419 if (tool->thread_map == NULL) 420 tool->thread_map = process_event_thread_map_stub; 421 if (tool->cpu_map == NULL) 422 tool->cpu_map = process_event_cpu_map_stub; 423 if (tool->stat_config == NULL) 424 tool->stat_config = process_event_stat_config_stub; 425 if (tool->stat == NULL) 426 tool->stat = process_stat_stub; 427 if (tool->stat_round == NULL) 428 tool->stat_round = process_stat_round_stub; 429 if (tool->time_conv == NULL) 430 tool->time_conv = process_event_op2_stub; 431 if (tool->feature == NULL) 432 tool->feature = process_event_op2_stub; 433 } 434 435 static void swap_sample_id_all(union perf_event *event, void *data) 436 { 437 void *end = (void *) event + event->header.size; 438 int size = end - data; 439 440 BUG_ON(size % sizeof(u64)); 441 mem_bswap_64(data, size); 442 } 443 444 static void perf_event__all64_swap(union perf_event *event, 445 bool sample_id_all __maybe_unused) 446 { 447 struct perf_event_header *hdr = &event->header; 448 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 449 } 450 451 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 452 { 453 event->comm.pid = bswap_32(event->comm.pid); 454 event->comm.tid = bswap_32(event->comm.tid); 455 456 if (sample_id_all) { 457 void *data = &event->comm.comm; 458 459 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 460 swap_sample_id_all(event, data); 461 } 462 } 463 464 static void perf_event__mmap_swap(union perf_event *event, 465 bool sample_id_all) 466 { 467 event->mmap.pid = bswap_32(event->mmap.pid); 468 event->mmap.tid = bswap_32(event->mmap.tid); 469 event->mmap.start = bswap_64(event->mmap.start); 470 event->mmap.len = bswap_64(event->mmap.len); 471 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 472 473 if (sample_id_all) { 474 void *data = &event->mmap.filename; 475 476 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 477 swap_sample_id_all(event, data); 478 } 479 } 480 481 static void perf_event__mmap2_swap(union perf_event *event, 482 bool sample_id_all) 483 { 484 event->mmap2.pid = bswap_32(event->mmap2.pid); 485 event->mmap2.tid = bswap_32(event->mmap2.tid); 486 event->mmap2.start = bswap_64(event->mmap2.start); 487 event->mmap2.len = bswap_64(event->mmap2.len); 488 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); 489 event->mmap2.maj = bswap_32(event->mmap2.maj); 490 event->mmap2.min = bswap_32(event->mmap2.min); 491 event->mmap2.ino = bswap_64(event->mmap2.ino); 492 493 if (sample_id_all) { 494 void *data = &event->mmap2.filename; 495 496 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 497 swap_sample_id_all(event, data); 498 } 499 } 500 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 501 { 502 event->fork.pid = bswap_32(event->fork.pid); 503 event->fork.tid = bswap_32(event->fork.tid); 504 event->fork.ppid = bswap_32(event->fork.ppid); 505 event->fork.ptid = bswap_32(event->fork.ptid); 506 event->fork.time = bswap_64(event->fork.time); 507 508 if (sample_id_all) 509 swap_sample_id_all(event, &event->fork + 1); 510 } 511 512 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 513 { 514 event->read.pid = bswap_32(event->read.pid); 515 event->read.tid = bswap_32(event->read.tid); 516 event->read.value = bswap_64(event->read.value); 517 event->read.time_enabled = bswap_64(event->read.time_enabled); 518 event->read.time_running = bswap_64(event->read.time_running); 519 event->read.id = bswap_64(event->read.id); 520 521 if (sample_id_all) 522 swap_sample_id_all(event, &event->read + 1); 523 } 524 525 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all) 526 { 527 event->aux.aux_offset = bswap_64(event->aux.aux_offset); 528 event->aux.aux_size = bswap_64(event->aux.aux_size); 529 event->aux.flags = bswap_64(event->aux.flags); 530 531 if (sample_id_all) 532 swap_sample_id_all(event, &event->aux + 1); 533 } 534 535 static void perf_event__itrace_start_swap(union perf_event *event, 536 bool sample_id_all) 537 { 538 event->itrace_start.pid = bswap_32(event->itrace_start.pid); 539 event->itrace_start.tid = bswap_32(event->itrace_start.tid); 540 541 if (sample_id_all) 542 swap_sample_id_all(event, &event->itrace_start + 1); 543 } 544 545 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all) 546 { 547 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) { 548 event->context_switch.next_prev_pid = 549 bswap_32(event->context_switch.next_prev_pid); 550 event->context_switch.next_prev_tid = 551 bswap_32(event->context_switch.next_prev_tid); 552 } 553 554 if (sample_id_all) 555 swap_sample_id_all(event, &event->context_switch + 1); 556 } 557 558 static void perf_event__throttle_swap(union perf_event *event, 559 bool sample_id_all) 560 { 561 event->throttle.time = bswap_64(event->throttle.time); 562 event->throttle.id = bswap_64(event->throttle.id); 563 event->throttle.stream_id = bswap_64(event->throttle.stream_id); 564 565 if (sample_id_all) 566 swap_sample_id_all(event, &event->throttle + 1); 567 } 568 569 static u8 revbyte(u8 b) 570 { 571 int rev = (b >> 4) | ((b & 0xf) << 4); 572 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 573 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 574 return (u8) rev; 575 } 576 577 /* 578 * XXX this is hack in attempt to carry flags bitfield 579 * through endian village. ABI says: 580 * 581 * Bit-fields are allocated from right to left (least to most significant) 582 * on little-endian implementations and from left to right (most to least 583 * significant) on big-endian implementations. 584 * 585 * The above seems to be byte specific, so we need to reverse each 586 * byte of the bitfield. 'Internet' also says this might be implementation 587 * specific and we probably need proper fix and carry perf_event_attr 588 * bitfield flags in separate data file FEAT_ section. Thought this seems 589 * to work for now. 590 */ 591 static void swap_bitfield(u8 *p, unsigned len) 592 { 593 unsigned i; 594 595 for (i = 0; i < len; i++) { 596 *p = revbyte(*p); 597 p++; 598 } 599 } 600 601 /* exported for swapping attributes in file header */ 602 void perf_event__attr_swap(struct perf_event_attr *attr) 603 { 604 attr->type = bswap_32(attr->type); 605 attr->size = bswap_32(attr->size); 606 607 #define bswap_safe(f, n) \ 608 (attr->size > (offsetof(struct perf_event_attr, f) + \ 609 sizeof(attr->f) * (n))) 610 #define bswap_field(f, sz) \ 611 do { \ 612 if (bswap_safe(f, 0)) \ 613 attr->f = bswap_##sz(attr->f); \ 614 } while(0) 615 #define bswap_field_16(f) bswap_field(f, 16) 616 #define bswap_field_32(f) bswap_field(f, 32) 617 #define bswap_field_64(f) bswap_field(f, 64) 618 619 bswap_field_64(config); 620 bswap_field_64(sample_period); 621 bswap_field_64(sample_type); 622 bswap_field_64(read_format); 623 bswap_field_32(wakeup_events); 624 bswap_field_32(bp_type); 625 bswap_field_64(bp_addr); 626 bswap_field_64(bp_len); 627 bswap_field_64(branch_sample_type); 628 bswap_field_64(sample_regs_user); 629 bswap_field_32(sample_stack_user); 630 bswap_field_32(aux_watermark); 631 bswap_field_16(sample_max_stack); 632 633 /* 634 * After read_format are bitfields. Check read_format because 635 * we are unable to use offsetof on bitfield. 636 */ 637 if (bswap_safe(read_format, 1)) 638 swap_bitfield((u8 *) (&attr->read_format + 1), 639 sizeof(u64)); 640 #undef bswap_field_64 641 #undef bswap_field_32 642 #undef bswap_field 643 #undef bswap_safe 644 } 645 646 static void perf_event__hdr_attr_swap(union perf_event *event, 647 bool sample_id_all __maybe_unused) 648 { 649 size_t size; 650 651 perf_event__attr_swap(&event->attr.attr); 652 653 size = event->header.size; 654 size -= (void *)&event->attr.id - (void *)event; 655 mem_bswap_64(event->attr.id, size); 656 } 657 658 static void perf_event__event_update_swap(union perf_event *event, 659 bool sample_id_all __maybe_unused) 660 { 661 event->event_update.type = bswap_64(event->event_update.type); 662 event->event_update.id = bswap_64(event->event_update.id); 663 } 664 665 static void perf_event__event_type_swap(union perf_event *event, 666 bool sample_id_all __maybe_unused) 667 { 668 event->event_type.event_type.event_id = 669 bswap_64(event->event_type.event_type.event_id); 670 } 671 672 static void perf_event__tracing_data_swap(union perf_event *event, 673 bool sample_id_all __maybe_unused) 674 { 675 event->tracing_data.size = bswap_32(event->tracing_data.size); 676 } 677 678 static void perf_event__auxtrace_info_swap(union perf_event *event, 679 bool sample_id_all __maybe_unused) 680 { 681 size_t size; 682 683 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type); 684 685 size = event->header.size; 686 size -= (void *)&event->auxtrace_info.priv - (void *)event; 687 mem_bswap_64(event->auxtrace_info.priv, size); 688 } 689 690 static void perf_event__auxtrace_swap(union perf_event *event, 691 bool sample_id_all __maybe_unused) 692 { 693 event->auxtrace.size = bswap_64(event->auxtrace.size); 694 event->auxtrace.offset = bswap_64(event->auxtrace.offset); 695 event->auxtrace.reference = bswap_64(event->auxtrace.reference); 696 event->auxtrace.idx = bswap_32(event->auxtrace.idx); 697 event->auxtrace.tid = bswap_32(event->auxtrace.tid); 698 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu); 699 } 700 701 static void perf_event__auxtrace_error_swap(union perf_event *event, 702 bool sample_id_all __maybe_unused) 703 { 704 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type); 705 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code); 706 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu); 707 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid); 708 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid); 709 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip); 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 struct perf_sample *sample, u64 file_offset) 874 { 875 return ordered_events__queue(&s->ordered_events, event, sample, 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 1081 if (sample) 1082 perf_evlist__print_tstamp(evlist, event, sample); 1083 1084 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 1085 event->header.size, perf_event__name(event->header.type)); 1086 } 1087 1088 static void dump_sample(struct perf_evsel *evsel, union perf_event *event, 1089 struct perf_sample *sample) 1090 { 1091 u64 sample_type; 1092 1093 if (!dump_trace) 1094 return; 1095 1096 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 1097 event->header.misc, sample->pid, sample->tid, sample->ip, 1098 sample->period, sample->addr); 1099 1100 sample_type = evsel->attr.sample_type; 1101 1102 if (sample_type & PERF_SAMPLE_CALLCHAIN) 1103 callchain__printf(evsel, sample); 1104 1105 if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !perf_evsel__has_branch_callstack(evsel)) 1106 branch_stack__printf(sample); 1107 1108 if (sample_type & PERF_SAMPLE_REGS_USER) 1109 regs_user__printf(sample); 1110 1111 if (sample_type & PERF_SAMPLE_REGS_INTR) 1112 regs_intr__printf(sample); 1113 1114 if (sample_type & PERF_SAMPLE_STACK_USER) 1115 stack_user__printf(&sample->user_stack); 1116 1117 if (sample_type & PERF_SAMPLE_WEIGHT) 1118 printf("... weight: %" PRIu64 "\n", sample->weight); 1119 1120 if (sample_type & PERF_SAMPLE_DATA_SRC) 1121 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src); 1122 1123 if (sample_type & PERF_SAMPLE_TRANSACTION) 1124 printf("... transaction: %" PRIx64 "\n", sample->transaction); 1125 1126 if (sample_type & PERF_SAMPLE_READ) 1127 sample_read__printf(sample, evsel->attr.read_format); 1128 } 1129 1130 static void dump_read(struct perf_evsel *evsel, union perf_event *event) 1131 { 1132 struct read_event *read_event = &event->read; 1133 u64 read_format; 1134 1135 if (!dump_trace) 1136 return; 1137 1138 printf(": %d %d %s %" PRIu64 "\n", event->read.pid, event->read.tid, 1139 evsel ? perf_evsel__name(evsel) : "FAIL", 1140 event->read.value); 1141 1142 read_format = evsel->attr.read_format; 1143 1144 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1145 printf("... time enabled : %" PRIu64 "\n", read_event->time_enabled); 1146 1147 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1148 printf("... time running : %" PRIu64 "\n", read_event->time_running); 1149 1150 if (read_format & PERF_FORMAT_ID) 1151 printf("... id : %" PRIu64 "\n", read_event->id); 1152 } 1153 1154 static struct machine *machines__find_for_cpumode(struct machines *machines, 1155 union perf_event *event, 1156 struct perf_sample *sample) 1157 { 1158 struct machine *machine; 1159 1160 if (perf_guest && 1161 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 1162 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) { 1163 u32 pid; 1164 1165 if (event->header.type == PERF_RECORD_MMAP 1166 || event->header.type == PERF_RECORD_MMAP2) 1167 pid = event->mmap.pid; 1168 else 1169 pid = sample->pid; 1170 1171 machine = machines__find(machines, pid); 1172 if (!machine) 1173 machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID); 1174 return machine; 1175 } 1176 1177 return &machines->host; 1178 } 1179 1180 static int deliver_sample_value(struct perf_evlist *evlist, 1181 struct perf_tool *tool, 1182 union perf_event *event, 1183 struct perf_sample *sample, 1184 struct sample_read_value *v, 1185 struct machine *machine) 1186 { 1187 struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id); 1188 1189 if (sid) { 1190 sample->id = v->id; 1191 sample->period = v->value - sid->period; 1192 sid->period = v->value; 1193 } 1194 1195 if (!sid || sid->evsel == NULL) { 1196 ++evlist->stats.nr_unknown_id; 1197 return 0; 1198 } 1199 1200 return tool->sample(tool, event, sample, sid->evsel, machine); 1201 } 1202 1203 static int deliver_sample_group(struct perf_evlist *evlist, 1204 struct perf_tool *tool, 1205 union perf_event *event, 1206 struct perf_sample *sample, 1207 struct machine *machine) 1208 { 1209 int ret = -EINVAL; 1210 u64 i; 1211 1212 for (i = 0; i < sample->read.group.nr; i++) { 1213 ret = deliver_sample_value(evlist, tool, event, sample, 1214 &sample->read.group.values[i], 1215 machine); 1216 if (ret) 1217 break; 1218 } 1219 1220 return ret; 1221 } 1222 1223 static int 1224 perf_evlist__deliver_sample(struct perf_evlist *evlist, 1225 struct perf_tool *tool, 1226 union perf_event *event, 1227 struct perf_sample *sample, 1228 struct perf_evsel *evsel, 1229 struct machine *machine) 1230 { 1231 /* We know evsel != NULL. */ 1232 u64 sample_type = evsel->attr.sample_type; 1233 u64 read_format = evsel->attr.read_format; 1234 1235 /* Standard sample delivery. */ 1236 if (!(sample_type & PERF_SAMPLE_READ)) 1237 return tool->sample(tool, event, sample, evsel, machine); 1238 1239 /* For PERF_SAMPLE_READ we have either single or group mode. */ 1240 if (read_format & PERF_FORMAT_GROUP) 1241 return deliver_sample_group(evlist, tool, event, sample, 1242 machine); 1243 else 1244 return deliver_sample_value(evlist, tool, event, sample, 1245 &sample->read.one, machine); 1246 } 1247 1248 static int machines__deliver_event(struct machines *machines, 1249 struct perf_evlist *evlist, 1250 union perf_event *event, 1251 struct perf_sample *sample, 1252 struct perf_tool *tool, u64 file_offset) 1253 { 1254 struct perf_evsel *evsel; 1255 struct machine *machine; 1256 1257 dump_event(evlist, event, file_offset, sample); 1258 1259 evsel = perf_evlist__id2evsel(evlist, sample->id); 1260 1261 machine = machines__find_for_cpumode(machines, event, sample); 1262 1263 switch (event->header.type) { 1264 case PERF_RECORD_SAMPLE: 1265 if (evsel == NULL) { 1266 ++evlist->stats.nr_unknown_id; 1267 return 0; 1268 } 1269 dump_sample(evsel, event, sample); 1270 if (machine == NULL) { 1271 ++evlist->stats.nr_unprocessable_samples; 1272 return 0; 1273 } 1274 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine); 1275 case PERF_RECORD_MMAP: 1276 return tool->mmap(tool, event, sample, machine); 1277 case PERF_RECORD_MMAP2: 1278 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT) 1279 ++evlist->stats.nr_proc_map_timeout; 1280 return tool->mmap2(tool, event, sample, machine); 1281 case PERF_RECORD_COMM: 1282 return tool->comm(tool, event, sample, machine); 1283 case PERF_RECORD_NAMESPACES: 1284 return tool->namespaces(tool, event, sample, machine); 1285 case PERF_RECORD_FORK: 1286 return tool->fork(tool, event, sample, machine); 1287 case PERF_RECORD_EXIT: 1288 return tool->exit(tool, event, sample, machine); 1289 case PERF_RECORD_LOST: 1290 if (tool->lost == perf_event__process_lost) 1291 evlist->stats.total_lost += event->lost.lost; 1292 return tool->lost(tool, event, sample, machine); 1293 case PERF_RECORD_LOST_SAMPLES: 1294 if (tool->lost_samples == perf_event__process_lost_samples) 1295 evlist->stats.total_lost_samples += event->lost_samples.lost; 1296 return tool->lost_samples(tool, event, sample, machine); 1297 case PERF_RECORD_READ: 1298 dump_read(evsel, event); 1299 return tool->read(tool, event, sample, evsel, machine); 1300 case PERF_RECORD_THROTTLE: 1301 return tool->throttle(tool, event, sample, machine); 1302 case PERF_RECORD_UNTHROTTLE: 1303 return tool->unthrottle(tool, event, sample, machine); 1304 case PERF_RECORD_AUX: 1305 if (tool->aux == perf_event__process_aux) { 1306 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) 1307 evlist->stats.total_aux_lost += 1; 1308 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL) 1309 evlist->stats.total_aux_partial += 1; 1310 } 1311 return tool->aux(tool, event, sample, machine); 1312 case PERF_RECORD_ITRACE_START: 1313 return tool->itrace_start(tool, event, sample, machine); 1314 case PERF_RECORD_SWITCH: 1315 case PERF_RECORD_SWITCH_CPU_WIDE: 1316 return tool->context_switch(tool, event, sample, machine); 1317 default: 1318 ++evlist->stats.nr_unknown_events; 1319 return -1; 1320 } 1321 } 1322 1323 static int perf_session__deliver_event(struct perf_session *session, 1324 union perf_event *event, 1325 struct perf_sample *sample, 1326 struct perf_tool *tool, 1327 u64 file_offset) 1328 { 1329 int ret; 1330 1331 ret = auxtrace__process_event(session, event, sample, tool); 1332 if (ret < 0) 1333 return ret; 1334 if (ret > 0) 1335 return 0; 1336 1337 return machines__deliver_event(&session->machines, session->evlist, 1338 event, sample, tool, file_offset); 1339 } 1340 1341 static s64 perf_session__process_user_event(struct perf_session *session, 1342 union perf_event *event, 1343 u64 file_offset) 1344 { 1345 struct ordered_events *oe = &session->ordered_events; 1346 struct perf_tool *tool = session->tool; 1347 int fd = perf_data_file__fd(session->file); 1348 int err; 1349 1350 dump_event(session->evlist, event, file_offset, NULL); 1351 1352 /* These events are processed right away */ 1353 switch (event->header.type) { 1354 case PERF_RECORD_HEADER_ATTR: 1355 err = tool->attr(tool, event, &session->evlist); 1356 if (err == 0) { 1357 perf_session__set_id_hdr_size(session); 1358 perf_session__set_comm_exec(session); 1359 } 1360 return err; 1361 case PERF_RECORD_EVENT_UPDATE: 1362 return tool->event_update(tool, event, &session->evlist); 1363 case PERF_RECORD_HEADER_EVENT_TYPE: 1364 /* 1365 * Depreceated, but we need to handle it for sake 1366 * of old data files create in pipe mode. 1367 */ 1368 return 0; 1369 case PERF_RECORD_HEADER_TRACING_DATA: 1370 /* setup for reading amidst mmap */ 1371 lseek(fd, file_offset, SEEK_SET); 1372 return tool->tracing_data(tool, event, session); 1373 case PERF_RECORD_HEADER_BUILD_ID: 1374 return tool->build_id(tool, event, session); 1375 case PERF_RECORD_FINISHED_ROUND: 1376 return tool->finished_round(tool, event, oe); 1377 case PERF_RECORD_ID_INDEX: 1378 return tool->id_index(tool, event, session); 1379 case PERF_RECORD_AUXTRACE_INFO: 1380 return tool->auxtrace_info(tool, event, session); 1381 case PERF_RECORD_AUXTRACE: 1382 /* setup for reading amidst mmap */ 1383 lseek(fd, file_offset + event->header.size, SEEK_SET); 1384 return tool->auxtrace(tool, event, session); 1385 case PERF_RECORD_AUXTRACE_ERROR: 1386 perf_session__auxtrace_error_inc(session, event); 1387 return tool->auxtrace_error(tool, event, session); 1388 case PERF_RECORD_THREAD_MAP: 1389 return tool->thread_map(tool, event, session); 1390 case PERF_RECORD_CPU_MAP: 1391 return tool->cpu_map(tool, event, session); 1392 case PERF_RECORD_STAT_CONFIG: 1393 return tool->stat_config(tool, event, session); 1394 case PERF_RECORD_STAT: 1395 return tool->stat(tool, event, session); 1396 case PERF_RECORD_STAT_ROUND: 1397 return tool->stat_round(tool, event, session); 1398 case PERF_RECORD_TIME_CONV: 1399 session->time_conv = event->time_conv; 1400 return tool->time_conv(tool, event, session); 1401 case PERF_RECORD_HEADER_FEATURE: 1402 return tool->feature(tool, event, session); 1403 default: 1404 return -EINVAL; 1405 } 1406 } 1407 1408 int perf_session__deliver_synth_event(struct perf_session *session, 1409 union perf_event *event, 1410 struct perf_sample *sample) 1411 { 1412 struct perf_evlist *evlist = session->evlist; 1413 struct perf_tool *tool = session->tool; 1414 1415 events_stats__inc(&evlist->stats, event->header.type); 1416 1417 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1418 return perf_session__process_user_event(session, event, 0); 1419 1420 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0); 1421 } 1422 1423 static void event_swap(union perf_event *event, bool sample_id_all) 1424 { 1425 perf_event__swap_op swap; 1426 1427 swap = perf_event__swap_ops[event->header.type]; 1428 if (swap) 1429 swap(event, sample_id_all); 1430 } 1431 1432 int perf_session__peek_event(struct perf_session *session, off_t file_offset, 1433 void *buf, size_t buf_sz, 1434 union perf_event **event_ptr, 1435 struct perf_sample *sample) 1436 { 1437 union perf_event *event; 1438 size_t hdr_sz, rest; 1439 int fd; 1440 1441 if (session->one_mmap && !session->header.needs_swap) { 1442 event = file_offset - session->one_mmap_offset + 1443 session->one_mmap_addr; 1444 goto out_parse_sample; 1445 } 1446 1447 if (perf_data_file__is_pipe(session->file)) 1448 return -1; 1449 1450 fd = perf_data_file__fd(session->file); 1451 hdr_sz = sizeof(struct perf_event_header); 1452 1453 if (buf_sz < hdr_sz) 1454 return -1; 1455 1456 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 || 1457 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz) 1458 return -1; 1459 1460 event = (union perf_event *)buf; 1461 1462 if (session->header.needs_swap) 1463 perf_event_header__bswap(&event->header); 1464 1465 if (event->header.size < hdr_sz || event->header.size > buf_sz) 1466 return -1; 1467 1468 rest = event->header.size - hdr_sz; 1469 1470 if (readn(fd, buf, rest) != (ssize_t)rest) 1471 return -1; 1472 1473 if (session->header.needs_swap) 1474 event_swap(event, perf_evlist__sample_id_all(session->evlist)); 1475 1476 out_parse_sample: 1477 1478 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START && 1479 perf_evlist__parse_sample(session->evlist, event, sample)) 1480 return -1; 1481 1482 *event_ptr = event; 1483 1484 return 0; 1485 } 1486 1487 static s64 perf_session__process_event(struct perf_session *session, 1488 union perf_event *event, u64 file_offset) 1489 { 1490 struct perf_evlist *evlist = session->evlist; 1491 struct perf_tool *tool = session->tool; 1492 struct perf_sample sample; 1493 int ret; 1494 1495 if (session->header.needs_swap) 1496 event_swap(event, perf_evlist__sample_id_all(evlist)); 1497 1498 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1499 return -EINVAL; 1500 1501 events_stats__inc(&evlist->stats, event->header.type); 1502 1503 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1504 return perf_session__process_user_event(session, event, file_offset); 1505 1506 /* 1507 * For all kernel events we get the sample data 1508 */ 1509 ret = perf_evlist__parse_sample(evlist, event, &sample); 1510 if (ret) 1511 return ret; 1512 1513 if (tool->ordered_events) { 1514 ret = perf_session__queue_event(session, event, &sample, file_offset); 1515 if (ret != -ETIME) 1516 return ret; 1517 } 1518 1519 return perf_session__deliver_event(session, event, &sample, tool, 1520 file_offset); 1521 } 1522 1523 void perf_event_header__bswap(struct perf_event_header *hdr) 1524 { 1525 hdr->type = bswap_32(hdr->type); 1526 hdr->misc = bswap_16(hdr->misc); 1527 hdr->size = bswap_16(hdr->size); 1528 } 1529 1530 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1531 { 1532 return machine__findnew_thread(&session->machines.host, -1, pid); 1533 } 1534 1535 int perf_session__register_idle_thread(struct perf_session *session) 1536 { 1537 struct thread *thread; 1538 int err = 0; 1539 1540 thread = machine__findnew_thread(&session->machines.host, 0, 0); 1541 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) { 1542 pr_err("problem inserting idle task.\n"); 1543 err = -1; 1544 } 1545 1546 if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) { 1547 pr_err("problem inserting idle task.\n"); 1548 err = -1; 1549 } 1550 1551 /* machine__findnew_thread() got the thread, so put it */ 1552 thread__put(thread); 1553 return err; 1554 } 1555 1556 static void 1557 perf_session__warn_order(const struct perf_session *session) 1558 { 1559 const struct ordered_events *oe = &session->ordered_events; 1560 struct perf_evsel *evsel; 1561 bool should_warn = true; 1562 1563 evlist__for_each_entry(session->evlist, evsel) { 1564 if (evsel->attr.write_backward) 1565 should_warn = false; 1566 } 1567 1568 if (!should_warn) 1569 return; 1570 if (oe->nr_unordered_events != 0) 1571 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events); 1572 } 1573 1574 static void perf_session__warn_about_errors(const struct perf_session *session) 1575 { 1576 const struct events_stats *stats = &session->evlist->stats; 1577 1578 if (session->tool->lost == perf_event__process_lost && 1579 stats->nr_events[PERF_RECORD_LOST] != 0) { 1580 ui__warning("Processed %d events and lost %d chunks!\n\n" 1581 "Check IO/CPU overload!\n\n", 1582 stats->nr_events[0], 1583 stats->nr_events[PERF_RECORD_LOST]); 1584 } 1585 1586 if (session->tool->lost_samples == perf_event__process_lost_samples) { 1587 double drop_rate; 1588 1589 drop_rate = (double)stats->total_lost_samples / 1590 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples); 1591 if (drop_rate > 0.05) { 1592 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%% samples!\n\n", 1593 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples, 1594 drop_rate * 100.0); 1595 } 1596 } 1597 1598 if (session->tool->aux == perf_event__process_aux && 1599 stats->total_aux_lost != 0) { 1600 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n", 1601 stats->total_aux_lost, 1602 stats->nr_events[PERF_RECORD_AUX]); 1603 } 1604 1605 if (session->tool->aux == perf_event__process_aux && 1606 stats->total_aux_partial != 0) { 1607 bool vmm_exclusive = false; 1608 1609 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive", 1610 &vmm_exclusive); 1611 1612 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n" 1613 "Are you running a KVM guest in the background?%s\n\n", 1614 stats->total_aux_partial, 1615 stats->nr_events[PERF_RECORD_AUX], 1616 vmm_exclusive ? 1617 "\nReloading kvm_intel module with vmm_exclusive=0\n" 1618 "will reduce the gaps to only guest's timeslices." : 1619 ""); 1620 } 1621 1622 if (stats->nr_unknown_events != 0) { 1623 ui__warning("Found %u unknown events!\n\n" 1624 "Is this an older tool processing a perf.data " 1625 "file generated by a more recent tool?\n\n" 1626 "If that is not the case, consider " 1627 "reporting to linux-kernel@vger.kernel.org.\n\n", 1628 stats->nr_unknown_events); 1629 } 1630 1631 if (stats->nr_unknown_id != 0) { 1632 ui__warning("%u samples with id not present in the header\n", 1633 stats->nr_unknown_id); 1634 } 1635 1636 if (stats->nr_invalid_chains != 0) { 1637 ui__warning("Found invalid callchains!\n\n" 1638 "%u out of %u events were discarded for this reason.\n\n" 1639 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1640 stats->nr_invalid_chains, 1641 stats->nr_events[PERF_RECORD_SAMPLE]); 1642 } 1643 1644 if (stats->nr_unprocessable_samples != 0) { 1645 ui__warning("%u unprocessable samples recorded.\n" 1646 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1647 stats->nr_unprocessable_samples); 1648 } 1649 1650 perf_session__warn_order(session); 1651 1652 events_stats__auxtrace_error_warn(stats); 1653 1654 if (stats->nr_proc_map_timeout != 0) { 1655 ui__warning("%d map information files for pre-existing threads were\n" 1656 "not processed, if there are samples for addresses they\n" 1657 "will not be resolved, you may find out which are these\n" 1658 "threads by running with -v and redirecting the output\n" 1659 "to a file.\n" 1660 "The time limit to process proc map is too short?\n" 1661 "Increase it by --proc-map-timeout\n", 1662 stats->nr_proc_map_timeout); 1663 } 1664 } 1665 1666 static int perf_session__flush_thread_stack(struct thread *thread, 1667 void *p __maybe_unused) 1668 { 1669 return thread_stack__flush(thread); 1670 } 1671 1672 static int perf_session__flush_thread_stacks(struct perf_session *session) 1673 { 1674 return machines__for_each_thread(&session->machines, 1675 perf_session__flush_thread_stack, 1676 NULL); 1677 } 1678 1679 volatile int session_done; 1680 1681 static int __perf_session__process_pipe_events(struct perf_session *session) 1682 { 1683 struct ordered_events *oe = &session->ordered_events; 1684 struct perf_tool *tool = session->tool; 1685 int fd = perf_data_file__fd(session->file); 1686 union perf_event *event; 1687 uint32_t size, cur_size = 0; 1688 void *buf = NULL; 1689 s64 skip = 0; 1690 u64 head; 1691 ssize_t err; 1692 void *p; 1693 1694 perf_tool__fill_defaults(tool); 1695 1696 head = 0; 1697 cur_size = sizeof(union perf_event); 1698 1699 buf = malloc(cur_size); 1700 if (!buf) 1701 return -errno; 1702 ordered_events__set_copy_on_queue(oe, true); 1703 more: 1704 event = buf; 1705 err = readn(fd, event, sizeof(struct perf_event_header)); 1706 if (err <= 0) { 1707 if (err == 0) 1708 goto done; 1709 1710 pr_err("failed to read event header\n"); 1711 goto out_err; 1712 } 1713 1714 if (session->header.needs_swap) 1715 perf_event_header__bswap(&event->header); 1716 1717 size = event->header.size; 1718 if (size < sizeof(struct perf_event_header)) { 1719 pr_err("bad event header size\n"); 1720 goto out_err; 1721 } 1722 1723 if (size > cur_size) { 1724 void *new = realloc(buf, size); 1725 if (!new) { 1726 pr_err("failed to allocate memory to read event\n"); 1727 goto out_err; 1728 } 1729 buf = new; 1730 cur_size = size; 1731 event = buf; 1732 } 1733 p = event; 1734 p += sizeof(struct perf_event_header); 1735 1736 if (size - sizeof(struct perf_event_header)) { 1737 err = readn(fd, p, size - sizeof(struct perf_event_header)); 1738 if (err <= 0) { 1739 if (err == 0) { 1740 pr_err("unexpected end of event stream\n"); 1741 goto done; 1742 } 1743 1744 pr_err("failed to read event data\n"); 1745 goto out_err; 1746 } 1747 } 1748 1749 if ((skip = perf_session__process_event(session, event, head)) < 0) { 1750 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1751 head, event->header.size, event->header.type); 1752 err = -EINVAL; 1753 goto out_err; 1754 } 1755 1756 head += size; 1757 1758 if (skip > 0) 1759 head += skip; 1760 1761 if (!session_done()) 1762 goto more; 1763 done: 1764 /* do the final flush for ordered samples */ 1765 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 1766 if (err) 1767 goto out_err; 1768 err = auxtrace__flush_events(session, tool); 1769 if (err) 1770 goto out_err; 1771 err = perf_session__flush_thread_stacks(session); 1772 out_err: 1773 free(buf); 1774 perf_session__warn_about_errors(session); 1775 ordered_events__free(&session->ordered_events); 1776 auxtrace__free_events(session); 1777 return err; 1778 } 1779 1780 static union perf_event * 1781 fetch_mmaped_event(struct perf_session *session, 1782 u64 head, size_t mmap_size, char *buf) 1783 { 1784 union perf_event *event; 1785 1786 /* 1787 * Ensure we have enough space remaining to read 1788 * the size of the event in the headers. 1789 */ 1790 if (head + sizeof(event->header) > mmap_size) 1791 return NULL; 1792 1793 event = (union perf_event *)(buf + head); 1794 1795 if (session->header.needs_swap) 1796 perf_event_header__bswap(&event->header); 1797 1798 if (head + event->header.size > mmap_size) { 1799 /* We're not fetching the event so swap back again */ 1800 if (session->header.needs_swap) 1801 perf_event_header__bswap(&event->header); 1802 return NULL; 1803 } 1804 1805 return event; 1806 } 1807 1808 /* 1809 * On 64bit we can mmap the data file in one go. No need for tiny mmap 1810 * slices. On 32bit we use 32MB. 1811 */ 1812 #if BITS_PER_LONG == 64 1813 #define MMAP_SIZE ULLONG_MAX 1814 #define NUM_MMAPS 1 1815 #else 1816 #define MMAP_SIZE (32 * 1024 * 1024ULL) 1817 #define NUM_MMAPS 128 1818 #endif 1819 1820 static int __perf_session__process_events(struct perf_session *session, 1821 u64 data_offset, u64 data_size, 1822 u64 file_size) 1823 { 1824 struct ordered_events *oe = &session->ordered_events; 1825 struct perf_tool *tool = session->tool; 1826 int fd = perf_data_file__fd(session->file); 1827 u64 head, page_offset, file_offset, file_pos, size; 1828 int err, mmap_prot, mmap_flags, map_idx = 0; 1829 size_t mmap_size; 1830 char *buf, *mmaps[NUM_MMAPS]; 1831 union perf_event *event; 1832 struct ui_progress prog; 1833 s64 skip; 1834 1835 perf_tool__fill_defaults(tool); 1836 1837 page_offset = page_size * (data_offset / page_size); 1838 file_offset = page_offset; 1839 head = data_offset - page_offset; 1840 1841 if (data_size == 0) 1842 goto out; 1843 1844 if (data_offset + data_size < file_size) 1845 file_size = data_offset + data_size; 1846 1847 ui_progress__init(&prog, file_size, "Processing events..."); 1848 1849 mmap_size = MMAP_SIZE; 1850 if (mmap_size > file_size) { 1851 mmap_size = file_size; 1852 session->one_mmap = true; 1853 } 1854 1855 memset(mmaps, 0, sizeof(mmaps)); 1856 1857 mmap_prot = PROT_READ; 1858 mmap_flags = MAP_SHARED; 1859 1860 if (session->header.needs_swap) { 1861 mmap_prot |= PROT_WRITE; 1862 mmap_flags = MAP_PRIVATE; 1863 } 1864 remap: 1865 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd, 1866 file_offset); 1867 if (buf == MAP_FAILED) { 1868 pr_err("failed to mmap file\n"); 1869 err = -errno; 1870 goto out_err; 1871 } 1872 mmaps[map_idx] = buf; 1873 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 1874 file_pos = file_offset + head; 1875 if (session->one_mmap) { 1876 session->one_mmap_addr = buf; 1877 session->one_mmap_offset = file_offset; 1878 } 1879 1880 more: 1881 event = fetch_mmaped_event(session, head, mmap_size, buf); 1882 if (!event) { 1883 if (mmaps[map_idx]) { 1884 munmap(mmaps[map_idx], mmap_size); 1885 mmaps[map_idx] = NULL; 1886 } 1887 1888 page_offset = page_size * (head / page_size); 1889 file_offset += page_offset; 1890 head -= page_offset; 1891 goto remap; 1892 } 1893 1894 size = event->header.size; 1895 1896 if (size < sizeof(struct perf_event_header) || 1897 (skip = perf_session__process_event(session, event, file_pos)) < 0) { 1898 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1899 file_offset + head, event->header.size, 1900 event->header.type); 1901 err = -EINVAL; 1902 goto out_err; 1903 } 1904 1905 if (skip) 1906 size += skip; 1907 1908 head += size; 1909 file_pos += size; 1910 1911 ui_progress__update(&prog, size); 1912 1913 if (session_done()) 1914 goto out; 1915 1916 if (file_pos < file_size) 1917 goto more; 1918 1919 out: 1920 /* do the final flush for ordered samples */ 1921 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 1922 if (err) 1923 goto out_err; 1924 err = auxtrace__flush_events(session, tool); 1925 if (err) 1926 goto out_err; 1927 err = perf_session__flush_thread_stacks(session); 1928 out_err: 1929 ui_progress__finish(); 1930 perf_session__warn_about_errors(session); 1931 /* 1932 * We may switching perf.data output, make ordered_events 1933 * reusable. 1934 */ 1935 ordered_events__reinit(&session->ordered_events); 1936 auxtrace__free_events(session); 1937 session->one_mmap = false; 1938 return err; 1939 } 1940 1941 int perf_session__process_events(struct perf_session *session) 1942 { 1943 u64 size = perf_data_file__size(session->file); 1944 int err; 1945 1946 if (perf_session__register_idle_thread(session) < 0) 1947 return -ENOMEM; 1948 1949 if (!perf_data_file__is_pipe(session->file)) 1950 err = __perf_session__process_events(session, 1951 session->header.data_offset, 1952 session->header.data_size, size); 1953 else 1954 err = __perf_session__process_pipe_events(session); 1955 1956 return err; 1957 } 1958 1959 bool perf_session__has_traces(struct perf_session *session, const char *msg) 1960 { 1961 struct perf_evsel *evsel; 1962 1963 evlist__for_each_entry(session->evlist, evsel) { 1964 if (evsel->attr.type == PERF_TYPE_TRACEPOINT) 1965 return true; 1966 } 1967 1968 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 1969 return false; 1970 } 1971 1972 int maps__set_kallsyms_ref_reloc_sym(struct map **maps, 1973 const char *symbol_name, u64 addr) 1974 { 1975 char *bracket; 1976 int i; 1977 struct ref_reloc_sym *ref; 1978 1979 ref = zalloc(sizeof(struct ref_reloc_sym)); 1980 if (ref == NULL) 1981 return -ENOMEM; 1982 1983 ref->name = strdup(symbol_name); 1984 if (ref->name == NULL) { 1985 free(ref); 1986 return -ENOMEM; 1987 } 1988 1989 bracket = strchr(ref->name, ']'); 1990 if (bracket) 1991 *bracket = '\0'; 1992 1993 ref->addr = addr; 1994 1995 for (i = 0; i < MAP__NR_TYPES; ++i) { 1996 struct kmap *kmap = map__kmap(maps[i]); 1997 1998 if (!kmap) 1999 continue; 2000 kmap->ref_reloc_sym = ref; 2001 } 2002 2003 return 0; 2004 } 2005 2006 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp) 2007 { 2008 return machines__fprintf_dsos(&session->machines, fp); 2009 } 2010 2011 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp, 2012 bool (skip)(struct dso *dso, int parm), int parm) 2013 { 2014 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm); 2015 } 2016 2017 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 2018 { 2019 size_t ret; 2020 const char *msg = ""; 2021 2022 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE)) 2023 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)"; 2024 2025 ret = fprintf(fp, "\nAggregated stats:%s\n", msg); 2026 2027 ret += events_stats__fprintf(&session->evlist->stats, fp); 2028 return ret; 2029 } 2030 2031 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 2032 { 2033 /* 2034 * FIXME: Here we have to actually print all the machines in this 2035 * session, not just the host... 2036 */ 2037 return machine__fprintf(&session->machines.host, fp); 2038 } 2039 2040 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, 2041 unsigned int type) 2042 { 2043 struct perf_evsel *pos; 2044 2045 evlist__for_each_entry(session->evlist, pos) { 2046 if (pos->attr.type == type) 2047 return pos; 2048 } 2049 return NULL; 2050 } 2051 2052 int perf_session__cpu_bitmap(struct perf_session *session, 2053 const char *cpu_list, unsigned long *cpu_bitmap) 2054 { 2055 int i, err = -1; 2056 struct cpu_map *map; 2057 2058 for (i = 0; i < PERF_TYPE_MAX; ++i) { 2059 struct perf_evsel *evsel; 2060 2061 evsel = perf_session__find_first_evtype(session, i); 2062 if (!evsel) 2063 continue; 2064 2065 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) { 2066 pr_err("File does not contain CPU events. " 2067 "Remove -C option to proceed.\n"); 2068 return -1; 2069 } 2070 } 2071 2072 map = cpu_map__new(cpu_list); 2073 if (map == NULL) { 2074 pr_err("Invalid cpu_list\n"); 2075 return -1; 2076 } 2077 2078 for (i = 0; i < map->nr; i++) { 2079 int cpu = map->map[i]; 2080 2081 if (cpu >= MAX_NR_CPUS) { 2082 pr_err("Requested CPU %d too large. " 2083 "Consider raising MAX_NR_CPUS\n", cpu); 2084 goto out_delete_map; 2085 } 2086 2087 set_bit(cpu, cpu_bitmap); 2088 } 2089 2090 err = 0; 2091 2092 out_delete_map: 2093 cpu_map__put(map); 2094 return err; 2095 } 2096 2097 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 2098 bool full) 2099 { 2100 if (session == NULL || fp == NULL) 2101 return; 2102 2103 fprintf(fp, "# ========\n"); 2104 perf_header__fprintf_info(session, fp, full); 2105 fprintf(fp, "# ========\n#\n"); 2106 } 2107 2108 2109 int __perf_session__set_tracepoints_handlers(struct perf_session *session, 2110 const struct perf_evsel_str_handler *assocs, 2111 size_t nr_assocs) 2112 { 2113 struct perf_evsel *evsel; 2114 size_t i; 2115 int err; 2116 2117 for (i = 0; i < nr_assocs; i++) { 2118 /* 2119 * Adding a handler for an event not in the session, 2120 * just ignore it. 2121 */ 2122 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name); 2123 if (evsel == NULL) 2124 continue; 2125 2126 err = -EEXIST; 2127 if (evsel->handler != NULL) 2128 goto out; 2129 evsel->handler = assocs[i].handler; 2130 } 2131 2132 err = 0; 2133 out: 2134 return err; 2135 } 2136 2137 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused, 2138 union perf_event *event, 2139 struct perf_session *session) 2140 { 2141 struct perf_evlist *evlist = session->evlist; 2142 struct id_index_event *ie = &event->id_index; 2143 size_t i, nr, max_nr; 2144 2145 max_nr = (ie->header.size - sizeof(struct id_index_event)) / 2146 sizeof(struct id_index_entry); 2147 nr = ie->nr; 2148 if (nr > max_nr) 2149 return -EINVAL; 2150 2151 if (dump_trace) 2152 fprintf(stdout, " nr: %zu\n", nr); 2153 2154 for (i = 0; i < nr; i++) { 2155 struct id_index_entry *e = &ie->entries[i]; 2156 struct perf_sample_id *sid; 2157 2158 if (dump_trace) { 2159 fprintf(stdout, " ... id: %"PRIu64, e->id); 2160 fprintf(stdout, " idx: %"PRIu64, e->idx); 2161 fprintf(stdout, " cpu: %"PRId64, e->cpu); 2162 fprintf(stdout, " tid: %"PRId64"\n", e->tid); 2163 } 2164 2165 sid = perf_evlist__id2sid(evlist, e->id); 2166 if (!sid) 2167 return -ENOENT; 2168 sid->idx = e->idx; 2169 sid->cpu = e->cpu; 2170 sid->tid = e->tid; 2171 } 2172 return 0; 2173 } 2174 2175 int perf_event__synthesize_id_index(struct perf_tool *tool, 2176 perf_event__handler_t process, 2177 struct perf_evlist *evlist, 2178 struct machine *machine) 2179 { 2180 union perf_event *ev; 2181 struct perf_evsel *evsel; 2182 size_t nr = 0, i = 0, sz, max_nr, n; 2183 int err; 2184 2185 pr_debug2("Synthesizing id index\n"); 2186 2187 max_nr = (UINT16_MAX - sizeof(struct id_index_event)) / 2188 sizeof(struct id_index_entry); 2189 2190 evlist__for_each_entry(evlist, evsel) 2191 nr += evsel->ids; 2192 2193 n = nr > max_nr ? max_nr : nr; 2194 sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry); 2195 ev = zalloc(sz); 2196 if (!ev) 2197 return -ENOMEM; 2198 2199 ev->id_index.header.type = PERF_RECORD_ID_INDEX; 2200 ev->id_index.header.size = sz; 2201 ev->id_index.nr = n; 2202 2203 evlist__for_each_entry(evlist, evsel) { 2204 u32 j; 2205 2206 for (j = 0; j < evsel->ids; j++) { 2207 struct id_index_entry *e; 2208 struct perf_sample_id *sid; 2209 2210 if (i >= n) { 2211 err = process(tool, ev, NULL, machine); 2212 if (err) 2213 goto out_err; 2214 nr -= n; 2215 i = 0; 2216 } 2217 2218 e = &ev->id_index.entries[i++]; 2219 2220 e->id = evsel->id[j]; 2221 2222 sid = perf_evlist__id2sid(evlist, e->id); 2223 if (!sid) { 2224 free(ev); 2225 return -ENOENT; 2226 } 2227 2228 e->idx = sid->idx; 2229 e->cpu = sid->cpu; 2230 e->tid = sid->tid; 2231 } 2232 } 2233 2234 sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry); 2235 ev->id_index.header.size = sz; 2236 ev->id_index.nr = nr; 2237 2238 err = process(tool, ev, NULL, machine); 2239 out_err: 2240 free(ev); 2241 2242 return err; 2243 } 2244