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