1 #include <linux/kernel.h> 2 #include <traceevent/event-parse.h> 3 #include <api/fs/fs.h> 4 5 #include <byteswap.h> 6 #include <unistd.h> 7 #include <sys/types.h> 8 #include <sys/mman.h> 9 10 #include "evlist.h" 11 #include "evsel.h" 12 #include "session.h" 13 #include "tool.h" 14 #include "sort.h" 15 #include "util.h" 16 #include "cpumap.h" 17 #include "perf_regs.h" 18 #include "asm/bug.h" 19 #include "auxtrace.h" 20 #include "thread-stack.h" 21 #include "stat.h" 22 23 static int perf_session__deliver_event(struct perf_session *session, 24 union perf_event *event, 25 struct perf_sample *sample, 26 struct perf_tool *tool, 27 u64 file_offset); 28 29 static int perf_session__open(struct perf_session *session) 30 { 31 struct perf_data_file *file = session->file; 32 33 if (perf_session__read_header(session) < 0) { 34 pr_err("incompatible file format (rerun with -v to learn more)\n"); 35 return -1; 36 } 37 38 if (perf_data_file__is_pipe(file)) 39 return 0; 40 41 if (perf_header__has_feat(&session->header, HEADER_STAT)) 42 return 0; 43 44 if (!perf_evlist__valid_sample_type(session->evlist)) { 45 pr_err("non matching sample_type\n"); 46 return -1; 47 } 48 49 if (!perf_evlist__valid_sample_id_all(session->evlist)) { 50 pr_err("non matching sample_id_all\n"); 51 return -1; 52 } 53 54 if (!perf_evlist__valid_read_format(session->evlist)) { 55 pr_err("non matching read_format\n"); 56 return -1; 57 } 58 59 return 0; 60 } 61 62 void perf_session__set_id_hdr_size(struct perf_session *session) 63 { 64 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist); 65 66 machines__set_id_hdr_size(&session->machines, id_hdr_size); 67 } 68 69 int perf_session__create_kernel_maps(struct perf_session *session) 70 { 71 int ret = machine__create_kernel_maps(&session->machines.host); 72 73 if (ret >= 0) 74 ret = machines__create_guest_kernel_maps(&session->machines); 75 return ret; 76 } 77 78 static void perf_session__destroy_kernel_maps(struct perf_session *session) 79 { 80 machines__destroy_kernel_maps(&session->machines); 81 } 82 83 static bool perf_session__has_comm_exec(struct perf_session *session) 84 { 85 struct perf_evsel *evsel; 86 87 evlist__for_each_entry(session->evlist, evsel) { 88 if (evsel->attr.comm_exec) 89 return true; 90 } 91 92 return false; 93 } 94 95 static void perf_session__set_comm_exec(struct perf_session *session) 96 { 97 bool comm_exec = perf_session__has_comm_exec(session); 98 99 machines__set_comm_exec(&session->machines, comm_exec); 100 } 101 102 static int ordered_events__deliver_event(struct ordered_events *oe, 103 struct ordered_event *event) 104 { 105 struct perf_sample sample; 106 struct perf_session *session = container_of(oe, struct perf_session, 107 ordered_events); 108 int ret = perf_evlist__parse_sample(session->evlist, event->event, &sample); 109 110 if (ret) { 111 pr_err("Can't parse sample, err = %d\n", ret); 112 return ret; 113 } 114 115 return perf_session__deliver_event(session, event->event, &sample, 116 session->tool, event->file_offset); 117 } 118 119 struct perf_session *perf_session__new(struct perf_data_file *file, 120 bool repipe, struct perf_tool *tool) 121 { 122 struct perf_session *session = zalloc(sizeof(*session)); 123 124 if (!session) 125 goto out; 126 127 session->repipe = repipe; 128 session->tool = tool; 129 INIT_LIST_HEAD(&session->auxtrace_index); 130 machines__init(&session->machines); 131 ordered_events__init(&session->ordered_events, ordered_events__deliver_event); 132 133 if (file) { 134 if (perf_data_file__open(file)) 135 goto out_delete; 136 137 session->file = file; 138 139 if (perf_data_file__is_read(file)) { 140 if (perf_session__open(session) < 0) 141 goto out_close; 142 143 /* 144 * set session attributes that are present in perf.data 145 * but not in pipe-mode. 146 */ 147 if (!file->is_pipe) { 148 perf_session__set_id_hdr_size(session); 149 perf_session__set_comm_exec(session); 150 } 151 } 152 } else { 153 session->machines.host.env = &perf_env; 154 } 155 156 if (!file || perf_data_file__is_write(file)) { 157 /* 158 * In O_RDONLY mode this will be performed when reading the 159 * kernel MMAP event, in perf_event__process_mmap(). 160 */ 161 if (perf_session__create_kernel_maps(session) < 0) 162 pr_warning("Cannot read kernel map\n"); 163 } 164 165 /* 166 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is 167 * processed, so perf_evlist__sample_id_all is not meaningful here. 168 */ 169 if ((!file || !file->is_pipe) && tool && tool->ordering_requires_timestamps && 170 tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) { 171 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); 172 tool->ordered_events = false; 173 } 174 175 return session; 176 177 out_close: 178 perf_data_file__close(file); 179 out_delete: 180 perf_session__delete(session); 181 out: 182 return NULL; 183 } 184 185 static void perf_session__delete_threads(struct perf_session *session) 186 { 187 machine__delete_threads(&session->machines.host); 188 } 189 190 void perf_session__delete(struct perf_session *session) 191 { 192 if (session == NULL) 193 return; 194 auxtrace__free(session); 195 auxtrace_index__free(&session->auxtrace_index); 196 perf_session__destroy_kernel_maps(session); 197 perf_session__delete_threads(session); 198 perf_env__exit(&session->header.env); 199 machines__exit(&session->machines); 200 if (session->file) 201 perf_data_file__close(session->file); 202 free(session); 203 } 204 205 static int process_event_synth_tracing_data_stub(struct perf_tool *tool 206 __maybe_unused, 207 union perf_event *event 208 __maybe_unused, 209 struct perf_session *session 210 __maybe_unused) 211 { 212 dump_printf(": unhandled!\n"); 213 return 0; 214 } 215 216 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused, 217 union perf_event *event __maybe_unused, 218 struct perf_evlist **pevlist 219 __maybe_unused) 220 { 221 dump_printf(": unhandled!\n"); 222 return 0; 223 } 224 225 static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused, 226 union perf_event *event __maybe_unused, 227 struct perf_evlist **pevlist 228 __maybe_unused) 229 { 230 if (dump_trace) 231 perf_event__fprintf_event_update(event, stdout); 232 233 dump_printf(": unhandled!\n"); 234 return 0; 235 } 236 237 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused, 238 union perf_event *event __maybe_unused, 239 struct perf_sample *sample __maybe_unused, 240 struct perf_evsel *evsel __maybe_unused, 241 struct machine *machine __maybe_unused) 242 { 243 dump_printf(": unhandled!\n"); 244 return 0; 245 } 246 247 static int process_event_stub(struct perf_tool *tool __maybe_unused, 248 union perf_event *event __maybe_unused, 249 struct perf_sample *sample __maybe_unused, 250 struct machine *machine __maybe_unused) 251 { 252 dump_printf(": unhandled!\n"); 253 return 0; 254 } 255 256 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused, 257 union perf_event *event __maybe_unused, 258 struct ordered_events *oe __maybe_unused) 259 { 260 dump_printf(": unhandled!\n"); 261 return 0; 262 } 263 264 static int process_finished_round(struct perf_tool *tool, 265 union perf_event *event, 266 struct ordered_events *oe); 267 268 static int skipn(int fd, off_t n) 269 { 270 char buf[4096]; 271 ssize_t ret; 272 273 while (n > 0) { 274 ret = read(fd, buf, min(n, (off_t)sizeof(buf))); 275 if (ret <= 0) 276 return ret; 277 n -= ret; 278 } 279 280 return 0; 281 } 282 283 static s64 process_event_auxtrace_stub(struct perf_tool *tool __maybe_unused, 284 union perf_event *event, 285 struct perf_session *session 286 __maybe_unused) 287 { 288 dump_printf(": unhandled!\n"); 289 if (perf_data_file__is_pipe(session->file)) 290 skipn(perf_data_file__fd(session->file), event->auxtrace.size); 291 return event->auxtrace.size; 292 } 293 294 static int process_event_op2_stub(struct perf_tool *tool __maybe_unused, 295 union perf_event *event __maybe_unused, 296 struct perf_session *session __maybe_unused) 297 { 298 dump_printf(": unhandled!\n"); 299 return 0; 300 } 301 302 303 static 304 int process_event_thread_map_stub(struct perf_tool *tool __maybe_unused, 305 union perf_event *event __maybe_unused, 306 struct perf_session *session __maybe_unused) 307 { 308 if (dump_trace) 309 perf_event__fprintf_thread_map(event, stdout); 310 311 dump_printf(": unhandled!\n"); 312 return 0; 313 } 314 315 static 316 int process_event_cpu_map_stub(struct perf_tool *tool __maybe_unused, 317 union perf_event *event __maybe_unused, 318 struct perf_session *session __maybe_unused) 319 { 320 if (dump_trace) 321 perf_event__fprintf_cpu_map(event, stdout); 322 323 dump_printf(": unhandled!\n"); 324 return 0; 325 } 326 327 static 328 int process_event_stat_config_stub(struct perf_tool *tool __maybe_unused, 329 union perf_event *event __maybe_unused, 330 struct perf_session *session __maybe_unused) 331 { 332 if (dump_trace) 333 perf_event__fprintf_stat_config(event, stdout); 334 335 dump_printf(": unhandled!\n"); 336 return 0; 337 } 338 339 static int process_stat_stub(struct perf_tool *tool __maybe_unused, 340 union perf_event *event __maybe_unused, 341 struct perf_session *perf_session 342 __maybe_unused) 343 { 344 if (dump_trace) 345 perf_event__fprintf_stat(event, stdout); 346 347 dump_printf(": unhandled!\n"); 348 return 0; 349 } 350 351 static int process_stat_round_stub(struct perf_tool *tool __maybe_unused, 352 union perf_event *event __maybe_unused, 353 struct perf_session *perf_session 354 __maybe_unused) 355 { 356 if (dump_trace) 357 perf_event__fprintf_stat_round(event, stdout); 358 359 dump_printf(": unhandled!\n"); 360 return 0; 361 } 362 363 void perf_tool__fill_defaults(struct perf_tool *tool) 364 { 365 if (tool->sample == NULL) 366 tool->sample = process_event_sample_stub; 367 if (tool->mmap == NULL) 368 tool->mmap = process_event_stub; 369 if (tool->mmap2 == NULL) 370 tool->mmap2 = process_event_stub; 371 if (tool->comm == NULL) 372 tool->comm = process_event_stub; 373 if (tool->fork == NULL) 374 tool->fork = process_event_stub; 375 if (tool->exit == NULL) 376 tool->exit = process_event_stub; 377 if (tool->lost == NULL) 378 tool->lost = perf_event__process_lost; 379 if (tool->lost_samples == NULL) 380 tool->lost_samples = perf_event__process_lost_samples; 381 if (tool->aux == NULL) 382 tool->aux = perf_event__process_aux; 383 if (tool->itrace_start == NULL) 384 tool->itrace_start = perf_event__process_itrace_start; 385 if (tool->context_switch == NULL) 386 tool->context_switch = perf_event__process_switch; 387 if (tool->read == NULL) 388 tool->read = process_event_sample_stub; 389 if (tool->throttle == NULL) 390 tool->throttle = process_event_stub; 391 if (tool->unthrottle == NULL) 392 tool->unthrottle = process_event_stub; 393 if (tool->attr == NULL) 394 tool->attr = process_event_synth_attr_stub; 395 if (tool->event_update == NULL) 396 tool->event_update = process_event_synth_event_update_stub; 397 if (tool->tracing_data == NULL) 398 tool->tracing_data = process_event_synth_tracing_data_stub; 399 if (tool->build_id == NULL) 400 tool->build_id = process_event_op2_stub; 401 if (tool->finished_round == NULL) { 402 if (tool->ordered_events) 403 tool->finished_round = process_finished_round; 404 else 405 tool->finished_round = process_finished_round_stub; 406 } 407 if (tool->id_index == NULL) 408 tool->id_index = process_event_op2_stub; 409 if (tool->auxtrace_info == NULL) 410 tool->auxtrace_info = process_event_op2_stub; 411 if (tool->auxtrace == NULL) 412 tool->auxtrace = process_event_auxtrace_stub; 413 if (tool->auxtrace_error == NULL) 414 tool->auxtrace_error = process_event_op2_stub; 415 if (tool->thread_map == NULL) 416 tool->thread_map = process_event_thread_map_stub; 417 if (tool->cpu_map == NULL) 418 tool->cpu_map = process_event_cpu_map_stub; 419 if (tool->stat_config == NULL) 420 tool->stat_config = process_event_stat_config_stub; 421 if (tool->stat == NULL) 422 tool->stat = process_stat_stub; 423 if (tool->stat_round == NULL) 424 tool->stat_round = process_stat_round_stub; 425 if (tool->time_conv == NULL) 426 tool->time_conv = process_event_op2_stub; 427 } 428 429 static void swap_sample_id_all(union perf_event *event, void *data) 430 { 431 void *end = (void *) event + event->header.size; 432 int size = end - data; 433 434 BUG_ON(size % sizeof(u64)); 435 mem_bswap_64(data, size); 436 } 437 438 static void perf_event__all64_swap(union perf_event *event, 439 bool sample_id_all __maybe_unused) 440 { 441 struct perf_event_header *hdr = &event->header; 442 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 443 } 444 445 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 446 { 447 event->comm.pid = bswap_32(event->comm.pid); 448 event->comm.tid = bswap_32(event->comm.tid); 449 450 if (sample_id_all) { 451 void *data = &event->comm.comm; 452 453 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 454 swap_sample_id_all(event, data); 455 } 456 } 457 458 static void perf_event__mmap_swap(union perf_event *event, 459 bool sample_id_all) 460 { 461 event->mmap.pid = bswap_32(event->mmap.pid); 462 event->mmap.tid = bswap_32(event->mmap.tid); 463 event->mmap.start = bswap_64(event->mmap.start); 464 event->mmap.len = bswap_64(event->mmap.len); 465 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 466 467 if (sample_id_all) { 468 void *data = &event->mmap.filename; 469 470 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 471 swap_sample_id_all(event, data); 472 } 473 } 474 475 static void perf_event__mmap2_swap(union perf_event *event, 476 bool sample_id_all) 477 { 478 event->mmap2.pid = bswap_32(event->mmap2.pid); 479 event->mmap2.tid = bswap_32(event->mmap2.tid); 480 event->mmap2.start = bswap_64(event->mmap2.start); 481 event->mmap2.len = bswap_64(event->mmap2.len); 482 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); 483 event->mmap2.maj = bswap_32(event->mmap2.maj); 484 event->mmap2.min = bswap_32(event->mmap2.min); 485 event->mmap2.ino = bswap_64(event->mmap2.ino); 486 487 if (sample_id_all) { 488 void *data = &event->mmap2.filename; 489 490 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 491 swap_sample_id_all(event, data); 492 } 493 } 494 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 495 { 496 event->fork.pid = bswap_32(event->fork.pid); 497 event->fork.tid = bswap_32(event->fork.tid); 498 event->fork.ppid = bswap_32(event->fork.ppid); 499 event->fork.ptid = bswap_32(event->fork.ptid); 500 event->fork.time = bswap_64(event->fork.time); 501 502 if (sample_id_all) 503 swap_sample_id_all(event, &event->fork + 1); 504 } 505 506 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 507 { 508 event->read.pid = bswap_32(event->read.pid); 509 event->read.tid = bswap_32(event->read.tid); 510 event->read.value = bswap_64(event->read.value); 511 event->read.time_enabled = bswap_64(event->read.time_enabled); 512 event->read.time_running = bswap_64(event->read.time_running); 513 event->read.id = bswap_64(event->read.id); 514 515 if (sample_id_all) 516 swap_sample_id_all(event, &event->read + 1); 517 } 518 519 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all) 520 { 521 event->aux.aux_offset = bswap_64(event->aux.aux_offset); 522 event->aux.aux_size = bswap_64(event->aux.aux_size); 523 event->aux.flags = bswap_64(event->aux.flags); 524 525 if (sample_id_all) 526 swap_sample_id_all(event, &event->aux + 1); 527 } 528 529 static void perf_event__itrace_start_swap(union perf_event *event, 530 bool sample_id_all) 531 { 532 event->itrace_start.pid = bswap_32(event->itrace_start.pid); 533 event->itrace_start.tid = bswap_32(event->itrace_start.tid); 534 535 if (sample_id_all) 536 swap_sample_id_all(event, &event->itrace_start + 1); 537 } 538 539 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all) 540 { 541 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) { 542 event->context_switch.next_prev_pid = 543 bswap_32(event->context_switch.next_prev_pid); 544 event->context_switch.next_prev_tid = 545 bswap_32(event->context_switch.next_prev_tid); 546 } 547 548 if (sample_id_all) 549 swap_sample_id_all(event, &event->context_switch + 1); 550 } 551 552 static void perf_event__throttle_swap(union perf_event *event, 553 bool sample_id_all) 554 { 555 event->throttle.time = bswap_64(event->throttle.time); 556 event->throttle.id = bswap_64(event->throttle.id); 557 event->throttle.stream_id = bswap_64(event->throttle.stream_id); 558 559 if (sample_id_all) 560 swap_sample_id_all(event, &event->throttle + 1); 561 } 562 563 static u8 revbyte(u8 b) 564 { 565 int rev = (b >> 4) | ((b & 0xf) << 4); 566 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 567 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 568 return (u8) rev; 569 } 570 571 /* 572 * XXX this is hack in attempt to carry flags bitfield 573 * through endian village. ABI says: 574 * 575 * Bit-fields are allocated from right to left (least to most significant) 576 * on little-endian implementations and from left to right (most to least 577 * significant) on big-endian implementations. 578 * 579 * The above seems to be byte specific, so we need to reverse each 580 * byte of the bitfield. 'Internet' also says this might be implementation 581 * specific and we probably need proper fix and carry perf_event_attr 582 * bitfield flags in separate data file FEAT_ section. Thought this seems 583 * to work for now. 584 */ 585 static void swap_bitfield(u8 *p, unsigned len) 586 { 587 unsigned i; 588 589 for (i = 0; i < len; i++) { 590 *p = revbyte(*p); 591 p++; 592 } 593 } 594 595 /* exported for swapping attributes in file header */ 596 void perf_event__attr_swap(struct perf_event_attr *attr) 597 { 598 attr->type = bswap_32(attr->type); 599 attr->size = bswap_32(attr->size); 600 601 #define bswap_safe(f, n) \ 602 (attr->size > (offsetof(struct perf_event_attr, f) + \ 603 sizeof(attr->f) * (n))) 604 #define bswap_field(f, sz) \ 605 do { \ 606 if (bswap_safe(f, 0)) \ 607 attr->f = bswap_##sz(attr->f); \ 608 } while(0) 609 #define bswap_field_16(f) bswap_field(f, 16) 610 #define bswap_field_32(f) bswap_field(f, 32) 611 #define bswap_field_64(f) bswap_field(f, 64) 612 613 bswap_field_64(config); 614 bswap_field_64(sample_period); 615 bswap_field_64(sample_type); 616 bswap_field_64(read_format); 617 bswap_field_32(wakeup_events); 618 bswap_field_32(bp_type); 619 bswap_field_64(bp_addr); 620 bswap_field_64(bp_len); 621 bswap_field_64(branch_sample_type); 622 bswap_field_64(sample_regs_user); 623 bswap_field_32(sample_stack_user); 624 bswap_field_32(aux_watermark); 625 bswap_field_16(sample_max_stack); 626 627 /* 628 * After read_format are bitfields. Check read_format because 629 * we are unable to use offsetof on bitfield. 630 */ 631 if (bswap_safe(read_format, 1)) 632 swap_bitfield((u8 *) (&attr->read_format + 1), 633 sizeof(u64)); 634 #undef bswap_field_64 635 #undef bswap_field_32 636 #undef bswap_field 637 #undef bswap_safe 638 } 639 640 static void perf_event__hdr_attr_swap(union perf_event *event, 641 bool sample_id_all __maybe_unused) 642 { 643 size_t size; 644 645 perf_event__attr_swap(&event->attr.attr); 646 647 size = event->header.size; 648 size -= (void *)&event->attr.id - (void *)event; 649 mem_bswap_64(event->attr.id, size); 650 } 651 652 static void perf_event__event_update_swap(union perf_event *event, 653 bool sample_id_all __maybe_unused) 654 { 655 event->event_update.type = bswap_64(event->event_update.type); 656 event->event_update.id = bswap_64(event->event_update.id); 657 } 658 659 static void perf_event__event_type_swap(union perf_event *event, 660 bool sample_id_all __maybe_unused) 661 { 662 event->event_type.event_type.event_id = 663 bswap_64(event->event_type.event_type.event_id); 664 } 665 666 static void perf_event__tracing_data_swap(union perf_event *event, 667 bool sample_id_all __maybe_unused) 668 { 669 event->tracing_data.size = bswap_32(event->tracing_data.size); 670 } 671 672 static void perf_event__auxtrace_info_swap(union perf_event *event, 673 bool sample_id_all __maybe_unused) 674 { 675 size_t size; 676 677 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type); 678 679 size = event->header.size; 680 size -= (void *)&event->auxtrace_info.priv - (void *)event; 681 mem_bswap_64(event->auxtrace_info.priv, size); 682 } 683 684 static void perf_event__auxtrace_swap(union perf_event *event, 685 bool sample_id_all __maybe_unused) 686 { 687 event->auxtrace.size = bswap_64(event->auxtrace.size); 688 event->auxtrace.offset = bswap_64(event->auxtrace.offset); 689 event->auxtrace.reference = bswap_64(event->auxtrace.reference); 690 event->auxtrace.idx = bswap_32(event->auxtrace.idx); 691 event->auxtrace.tid = bswap_32(event->auxtrace.tid); 692 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu); 693 } 694 695 static void perf_event__auxtrace_error_swap(union perf_event *event, 696 bool sample_id_all __maybe_unused) 697 { 698 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type); 699 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code); 700 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu); 701 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid); 702 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid); 703 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip); 704 } 705 706 static void perf_event__thread_map_swap(union perf_event *event, 707 bool sample_id_all __maybe_unused) 708 { 709 unsigned i; 710 711 event->thread_map.nr = bswap_64(event->thread_map.nr); 712 713 for (i = 0; i < event->thread_map.nr; i++) 714 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid); 715 } 716 717 static void perf_event__cpu_map_swap(union perf_event *event, 718 bool sample_id_all __maybe_unused) 719 { 720 struct cpu_map_data *data = &event->cpu_map.data; 721 struct cpu_map_entries *cpus; 722 struct cpu_map_mask *mask; 723 unsigned i; 724 725 data->type = bswap_64(data->type); 726 727 switch (data->type) { 728 case PERF_CPU_MAP__CPUS: 729 cpus = (struct cpu_map_entries *)data->data; 730 731 cpus->nr = bswap_16(cpus->nr); 732 733 for (i = 0; i < cpus->nr; i++) 734 cpus->cpu[i] = bswap_16(cpus->cpu[i]); 735 break; 736 case PERF_CPU_MAP__MASK: 737 mask = (struct cpu_map_mask *) data->data; 738 739 mask->nr = bswap_16(mask->nr); 740 mask->long_size = bswap_16(mask->long_size); 741 742 switch (mask->long_size) { 743 case 4: mem_bswap_32(&mask->mask, mask->nr); break; 744 case 8: mem_bswap_64(&mask->mask, mask->nr); break; 745 default: 746 pr_err("cpu_map swap: unsupported long size\n"); 747 } 748 default: 749 break; 750 } 751 } 752 753 static void perf_event__stat_config_swap(union perf_event *event, 754 bool sample_id_all __maybe_unused) 755 { 756 u64 size; 757 758 size = event->stat_config.nr * sizeof(event->stat_config.data[0]); 759 size += 1; /* nr item itself */ 760 mem_bswap_64(&event->stat_config.nr, size); 761 } 762 763 static void perf_event__stat_swap(union perf_event *event, 764 bool sample_id_all __maybe_unused) 765 { 766 event->stat.id = bswap_64(event->stat.id); 767 event->stat.thread = bswap_32(event->stat.thread); 768 event->stat.cpu = bswap_32(event->stat.cpu); 769 event->stat.val = bswap_64(event->stat.val); 770 event->stat.ena = bswap_64(event->stat.ena); 771 event->stat.run = bswap_64(event->stat.run); 772 } 773 774 static void perf_event__stat_round_swap(union perf_event *event, 775 bool sample_id_all __maybe_unused) 776 { 777 event->stat_round.type = bswap_64(event->stat_round.type); 778 event->stat_round.time = bswap_64(event->stat_round.time); 779 } 780 781 typedef void (*perf_event__swap_op)(union perf_event *event, 782 bool sample_id_all); 783 784 static perf_event__swap_op perf_event__swap_ops[] = { 785 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 786 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap, 787 [PERF_RECORD_COMM] = perf_event__comm_swap, 788 [PERF_RECORD_FORK] = perf_event__task_swap, 789 [PERF_RECORD_EXIT] = perf_event__task_swap, 790 [PERF_RECORD_LOST] = perf_event__all64_swap, 791 [PERF_RECORD_READ] = perf_event__read_swap, 792 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap, 793 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap, 794 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 795 [PERF_RECORD_AUX] = perf_event__aux_swap, 796 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap, 797 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap, 798 [PERF_RECORD_SWITCH] = perf_event__switch_swap, 799 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap, 800 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 801 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 802 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 803 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 804 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap, 805 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap, 806 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap, 807 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap, 808 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap, 809 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap, 810 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap, 811 [PERF_RECORD_STAT] = perf_event__stat_swap, 812 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap, 813 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap, 814 [PERF_RECORD_TIME_CONV] = perf_event__all64_swap, 815 [PERF_RECORD_HEADER_MAX] = NULL, 816 }; 817 818 /* 819 * When perf record finishes a pass on every buffers, it records this pseudo 820 * event. 821 * We record the max timestamp t found in the pass n. 822 * Assuming these timestamps are monotonic across cpus, we know that if 823 * a buffer still has events with timestamps below t, they will be all 824 * available and then read in the pass n + 1. 825 * Hence when we start to read the pass n + 2, we can safely flush every 826 * events with timestamps below t. 827 * 828 * ============ PASS n ================= 829 * CPU 0 | CPU 1 830 * | 831 * cnt1 timestamps | cnt2 timestamps 832 * 1 | 2 833 * 2 | 3 834 * - | 4 <--- max recorded 835 * 836 * ============ PASS n + 1 ============== 837 * CPU 0 | CPU 1 838 * | 839 * cnt1 timestamps | cnt2 timestamps 840 * 3 | 5 841 * 4 | 6 842 * 5 | 7 <---- max recorded 843 * 844 * Flush every events below timestamp 4 845 * 846 * ============ PASS n + 2 ============== 847 * CPU 0 | CPU 1 848 * | 849 * cnt1 timestamps | cnt2 timestamps 850 * 6 | 8 851 * 7 | 9 852 * - | 10 853 * 854 * Flush every events below timestamp 7 855 * etc... 856 */ 857 static int process_finished_round(struct perf_tool *tool __maybe_unused, 858 union perf_event *event __maybe_unused, 859 struct ordered_events *oe) 860 { 861 if (dump_trace) 862 fprintf(stdout, "\n"); 863 return ordered_events__flush(oe, OE_FLUSH__ROUND); 864 } 865 866 int perf_session__queue_event(struct perf_session *s, union perf_event *event, 867 struct perf_sample *sample, u64 file_offset) 868 { 869 return ordered_events__queue(&s->ordered_events, event, sample, file_offset); 870 } 871 872 static void callchain__lbr_callstack_printf(struct perf_sample *sample) 873 { 874 struct ip_callchain *callchain = sample->callchain; 875 struct branch_stack *lbr_stack = sample->branch_stack; 876 u64 kernel_callchain_nr = callchain->nr; 877 unsigned int i; 878 879 for (i = 0; i < kernel_callchain_nr; i++) { 880 if (callchain->ips[i] == PERF_CONTEXT_USER) 881 break; 882 } 883 884 if ((i != kernel_callchain_nr) && lbr_stack->nr) { 885 u64 total_nr; 886 /* 887 * LBR callstack can only get user call chain, 888 * i is kernel call chain number, 889 * 1 is PERF_CONTEXT_USER. 890 * 891 * The user call chain is stored in LBR registers. 892 * LBR are pair registers. The caller is stored 893 * in "from" register, while the callee is stored 894 * in "to" register. 895 * For example, there is a call stack 896 * "A"->"B"->"C"->"D". 897 * The LBR registers will recorde like 898 * "C"->"D", "B"->"C", "A"->"B". 899 * So only the first "to" register and all "from" 900 * registers are needed to construct the whole stack. 901 */ 902 total_nr = i + 1 + lbr_stack->nr + 1; 903 kernel_callchain_nr = i + 1; 904 905 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr); 906 907 for (i = 0; i < kernel_callchain_nr; i++) 908 printf("..... %2d: %016" PRIx64 "\n", 909 i, callchain->ips[i]); 910 911 printf("..... %2d: %016" PRIx64 "\n", 912 (int)(kernel_callchain_nr), lbr_stack->entries[0].to); 913 for (i = 0; i < lbr_stack->nr; i++) 914 printf("..... %2d: %016" PRIx64 "\n", 915 (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from); 916 } 917 } 918 919 static void callchain__printf(struct perf_evsel *evsel, 920 struct perf_sample *sample) 921 { 922 unsigned int i; 923 struct ip_callchain *callchain = sample->callchain; 924 925 if (perf_evsel__has_branch_callstack(evsel)) 926 callchain__lbr_callstack_printf(sample); 927 928 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr); 929 930 for (i = 0; i < callchain->nr; i++) 931 printf("..... %2d: %016" PRIx64 "\n", 932 i, callchain->ips[i]); 933 } 934 935 static void branch_stack__printf(struct perf_sample *sample) 936 { 937 uint64_t i; 938 939 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr); 940 941 for (i = 0; i < sample->branch_stack->nr; i++) { 942 struct branch_entry *e = &sample->branch_stack->entries[i]; 943 944 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n", 945 i, e->from, e->to, 946 (unsigned short)e->flags.cycles, 947 e->flags.mispred ? "M" : " ", 948 e->flags.predicted ? "P" : " ", 949 e->flags.abort ? "A" : " ", 950 e->flags.in_tx ? "T" : " ", 951 (unsigned)e->flags.reserved); 952 } 953 } 954 955 static void regs_dump__printf(u64 mask, u64 *regs) 956 { 957 unsigned rid, i = 0; 958 959 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { 960 u64 val = regs[i++]; 961 962 printf(".... %-5s 0x%" PRIx64 "\n", 963 perf_reg_name(rid), val); 964 } 965 } 966 967 static const char *regs_abi[] = { 968 [PERF_SAMPLE_REGS_ABI_NONE] = "none", 969 [PERF_SAMPLE_REGS_ABI_32] = "32-bit", 970 [PERF_SAMPLE_REGS_ABI_64] = "64-bit", 971 }; 972 973 static inline const char *regs_dump_abi(struct regs_dump *d) 974 { 975 if (d->abi > PERF_SAMPLE_REGS_ABI_64) 976 return "unknown"; 977 978 return regs_abi[d->abi]; 979 } 980 981 static void regs__printf(const char *type, struct regs_dump *regs) 982 { 983 u64 mask = regs->mask; 984 985 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n", 986 type, 987 mask, 988 regs_dump_abi(regs)); 989 990 regs_dump__printf(mask, regs->regs); 991 } 992 993 static void regs_user__printf(struct perf_sample *sample) 994 { 995 struct regs_dump *user_regs = &sample->user_regs; 996 997 if (user_regs->regs) 998 regs__printf("user", user_regs); 999 } 1000 1001 static void regs_intr__printf(struct perf_sample *sample) 1002 { 1003 struct regs_dump *intr_regs = &sample->intr_regs; 1004 1005 if (intr_regs->regs) 1006 regs__printf("intr", intr_regs); 1007 } 1008 1009 static void stack_user__printf(struct stack_dump *dump) 1010 { 1011 printf("... ustack: size %" PRIu64 ", offset 0x%x\n", 1012 dump->size, dump->offset); 1013 } 1014 1015 static void perf_evlist__print_tstamp(struct perf_evlist *evlist, 1016 union perf_event *event, 1017 struct perf_sample *sample) 1018 { 1019 u64 sample_type = __perf_evlist__combined_sample_type(evlist); 1020 1021 if (event->header.type != PERF_RECORD_SAMPLE && 1022 !perf_evlist__sample_id_all(evlist)) { 1023 fputs("-1 -1 ", stdout); 1024 return; 1025 } 1026 1027 if ((sample_type & PERF_SAMPLE_CPU)) 1028 printf("%u ", sample->cpu); 1029 1030 if (sample_type & PERF_SAMPLE_TIME) 1031 printf("%" PRIu64 " ", sample->time); 1032 } 1033 1034 static void sample_read__printf(struct perf_sample *sample, u64 read_format) 1035 { 1036 printf("... sample_read:\n"); 1037 1038 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1039 printf("...... time enabled %016" PRIx64 "\n", 1040 sample->read.time_enabled); 1041 1042 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1043 printf("...... time running %016" PRIx64 "\n", 1044 sample->read.time_running); 1045 1046 if (read_format & PERF_FORMAT_GROUP) { 1047 u64 i; 1048 1049 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr); 1050 1051 for (i = 0; i < sample->read.group.nr; i++) { 1052 struct sample_read_value *value; 1053 1054 value = &sample->read.group.values[i]; 1055 printf("..... id %016" PRIx64 1056 ", value %016" PRIx64 "\n", 1057 value->id, value->value); 1058 } 1059 } else 1060 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n", 1061 sample->read.one.id, sample->read.one.value); 1062 } 1063 1064 static void dump_event(struct perf_evlist *evlist, union perf_event *event, 1065 u64 file_offset, struct perf_sample *sample) 1066 { 1067 if (!dump_trace) 1068 return; 1069 1070 printf("\n%#" PRIx64 " [%#x]: event: %d\n", 1071 file_offset, event->header.size, event->header.type); 1072 1073 trace_event(event); 1074 1075 if (sample) 1076 perf_evlist__print_tstamp(evlist, event, sample); 1077 1078 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 1079 event->header.size, perf_event__name(event->header.type)); 1080 } 1081 1082 static void dump_sample(struct perf_evsel *evsel, union perf_event *event, 1083 struct perf_sample *sample) 1084 { 1085 u64 sample_type; 1086 1087 if (!dump_trace) 1088 return; 1089 1090 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 1091 event->header.misc, sample->pid, sample->tid, sample->ip, 1092 sample->period, sample->addr); 1093 1094 sample_type = evsel->attr.sample_type; 1095 1096 if (sample_type & PERF_SAMPLE_CALLCHAIN) 1097 callchain__printf(evsel, sample); 1098 1099 if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !perf_evsel__has_branch_callstack(evsel)) 1100 branch_stack__printf(sample); 1101 1102 if (sample_type & PERF_SAMPLE_REGS_USER) 1103 regs_user__printf(sample); 1104 1105 if (sample_type & PERF_SAMPLE_REGS_INTR) 1106 regs_intr__printf(sample); 1107 1108 if (sample_type & PERF_SAMPLE_STACK_USER) 1109 stack_user__printf(&sample->user_stack); 1110 1111 if (sample_type & PERF_SAMPLE_WEIGHT) 1112 printf("... weight: %" PRIu64 "\n", sample->weight); 1113 1114 if (sample_type & PERF_SAMPLE_DATA_SRC) 1115 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src); 1116 1117 if (sample_type & PERF_SAMPLE_TRANSACTION) 1118 printf("... transaction: %" PRIx64 "\n", sample->transaction); 1119 1120 if (sample_type & PERF_SAMPLE_READ) 1121 sample_read__printf(sample, evsel->attr.read_format); 1122 } 1123 1124 static struct machine *machines__find_for_cpumode(struct machines *machines, 1125 union perf_event *event, 1126 struct perf_sample *sample) 1127 { 1128 struct machine *machine; 1129 1130 if (perf_guest && 1131 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 1132 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) { 1133 u32 pid; 1134 1135 if (event->header.type == PERF_RECORD_MMAP 1136 || event->header.type == PERF_RECORD_MMAP2) 1137 pid = event->mmap.pid; 1138 else 1139 pid = sample->pid; 1140 1141 machine = machines__find(machines, pid); 1142 if (!machine) 1143 machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID); 1144 return machine; 1145 } 1146 1147 return &machines->host; 1148 } 1149 1150 static int deliver_sample_value(struct perf_evlist *evlist, 1151 struct perf_tool *tool, 1152 union perf_event *event, 1153 struct perf_sample *sample, 1154 struct sample_read_value *v, 1155 struct machine *machine) 1156 { 1157 struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id); 1158 1159 if (sid) { 1160 sample->id = v->id; 1161 sample->period = v->value - sid->period; 1162 sid->period = v->value; 1163 } 1164 1165 if (!sid || sid->evsel == NULL) { 1166 ++evlist->stats.nr_unknown_id; 1167 return 0; 1168 } 1169 1170 return tool->sample(tool, event, sample, sid->evsel, machine); 1171 } 1172 1173 static int deliver_sample_group(struct perf_evlist *evlist, 1174 struct perf_tool *tool, 1175 union perf_event *event, 1176 struct perf_sample *sample, 1177 struct machine *machine) 1178 { 1179 int ret = -EINVAL; 1180 u64 i; 1181 1182 for (i = 0; i < sample->read.group.nr; i++) { 1183 ret = deliver_sample_value(evlist, tool, event, sample, 1184 &sample->read.group.values[i], 1185 machine); 1186 if (ret) 1187 break; 1188 } 1189 1190 return ret; 1191 } 1192 1193 static int 1194 perf_evlist__deliver_sample(struct perf_evlist *evlist, 1195 struct perf_tool *tool, 1196 union perf_event *event, 1197 struct perf_sample *sample, 1198 struct perf_evsel *evsel, 1199 struct machine *machine) 1200 { 1201 /* We know evsel != NULL. */ 1202 u64 sample_type = evsel->attr.sample_type; 1203 u64 read_format = evsel->attr.read_format; 1204 1205 /* Standard sample delivery. */ 1206 if (!(sample_type & PERF_SAMPLE_READ)) 1207 return tool->sample(tool, event, sample, evsel, machine); 1208 1209 /* For PERF_SAMPLE_READ we have either single or group mode. */ 1210 if (read_format & PERF_FORMAT_GROUP) 1211 return deliver_sample_group(evlist, tool, event, sample, 1212 machine); 1213 else 1214 return deliver_sample_value(evlist, tool, event, sample, 1215 &sample->read.one, machine); 1216 } 1217 1218 static int machines__deliver_event(struct machines *machines, 1219 struct perf_evlist *evlist, 1220 union perf_event *event, 1221 struct perf_sample *sample, 1222 struct perf_tool *tool, u64 file_offset) 1223 { 1224 struct perf_evsel *evsel; 1225 struct machine *machine; 1226 1227 dump_event(evlist, event, file_offset, sample); 1228 1229 evsel = perf_evlist__id2evsel(evlist, sample->id); 1230 1231 machine = machines__find_for_cpumode(machines, event, sample); 1232 1233 switch (event->header.type) { 1234 case PERF_RECORD_SAMPLE: 1235 if (evsel == NULL) { 1236 ++evlist->stats.nr_unknown_id; 1237 return 0; 1238 } 1239 dump_sample(evsel, event, sample); 1240 if (machine == NULL) { 1241 ++evlist->stats.nr_unprocessable_samples; 1242 return 0; 1243 } 1244 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine); 1245 case PERF_RECORD_MMAP: 1246 return tool->mmap(tool, event, sample, machine); 1247 case PERF_RECORD_MMAP2: 1248 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT) 1249 ++evlist->stats.nr_proc_map_timeout; 1250 return tool->mmap2(tool, event, sample, machine); 1251 case PERF_RECORD_COMM: 1252 return tool->comm(tool, event, sample, machine); 1253 case PERF_RECORD_NAMESPACES: 1254 return tool->namespaces(tool, event, sample, machine); 1255 case PERF_RECORD_FORK: 1256 return tool->fork(tool, event, sample, machine); 1257 case PERF_RECORD_EXIT: 1258 return tool->exit(tool, event, sample, machine); 1259 case PERF_RECORD_LOST: 1260 if (tool->lost == perf_event__process_lost) 1261 evlist->stats.total_lost += event->lost.lost; 1262 return tool->lost(tool, event, sample, machine); 1263 case PERF_RECORD_LOST_SAMPLES: 1264 if (tool->lost_samples == perf_event__process_lost_samples) 1265 evlist->stats.total_lost_samples += event->lost_samples.lost; 1266 return tool->lost_samples(tool, event, sample, machine); 1267 case PERF_RECORD_READ: 1268 return tool->read(tool, event, sample, evsel, machine); 1269 case PERF_RECORD_THROTTLE: 1270 return tool->throttle(tool, event, sample, machine); 1271 case PERF_RECORD_UNTHROTTLE: 1272 return tool->unthrottle(tool, event, sample, machine); 1273 case PERF_RECORD_AUX: 1274 if (tool->aux == perf_event__process_aux) { 1275 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) 1276 evlist->stats.total_aux_lost += 1; 1277 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL) 1278 evlist->stats.total_aux_partial += 1; 1279 } 1280 return tool->aux(tool, event, sample, machine); 1281 case PERF_RECORD_ITRACE_START: 1282 return tool->itrace_start(tool, event, sample, machine); 1283 case PERF_RECORD_SWITCH: 1284 case PERF_RECORD_SWITCH_CPU_WIDE: 1285 return tool->context_switch(tool, event, sample, machine); 1286 default: 1287 ++evlist->stats.nr_unknown_events; 1288 return -1; 1289 } 1290 } 1291 1292 static int perf_session__deliver_event(struct perf_session *session, 1293 union perf_event *event, 1294 struct perf_sample *sample, 1295 struct perf_tool *tool, 1296 u64 file_offset) 1297 { 1298 int ret; 1299 1300 ret = auxtrace__process_event(session, event, sample, tool); 1301 if (ret < 0) 1302 return ret; 1303 if (ret > 0) 1304 return 0; 1305 1306 return machines__deliver_event(&session->machines, session->evlist, 1307 event, sample, tool, file_offset); 1308 } 1309 1310 static s64 perf_session__process_user_event(struct perf_session *session, 1311 union perf_event *event, 1312 u64 file_offset) 1313 { 1314 struct ordered_events *oe = &session->ordered_events; 1315 struct perf_tool *tool = session->tool; 1316 int fd = perf_data_file__fd(session->file); 1317 int err; 1318 1319 dump_event(session->evlist, event, file_offset, NULL); 1320 1321 /* These events are processed right away */ 1322 switch (event->header.type) { 1323 case PERF_RECORD_HEADER_ATTR: 1324 err = tool->attr(tool, event, &session->evlist); 1325 if (err == 0) { 1326 perf_session__set_id_hdr_size(session); 1327 perf_session__set_comm_exec(session); 1328 } 1329 return err; 1330 case PERF_RECORD_EVENT_UPDATE: 1331 return tool->event_update(tool, event, &session->evlist); 1332 case PERF_RECORD_HEADER_EVENT_TYPE: 1333 /* 1334 * Depreceated, but we need to handle it for sake 1335 * of old data files create in pipe mode. 1336 */ 1337 return 0; 1338 case PERF_RECORD_HEADER_TRACING_DATA: 1339 /* setup for reading amidst mmap */ 1340 lseek(fd, file_offset, SEEK_SET); 1341 return tool->tracing_data(tool, event, session); 1342 case PERF_RECORD_HEADER_BUILD_ID: 1343 return tool->build_id(tool, event, session); 1344 case PERF_RECORD_FINISHED_ROUND: 1345 return tool->finished_round(tool, event, oe); 1346 case PERF_RECORD_ID_INDEX: 1347 return tool->id_index(tool, event, session); 1348 case PERF_RECORD_AUXTRACE_INFO: 1349 return tool->auxtrace_info(tool, event, session); 1350 case PERF_RECORD_AUXTRACE: 1351 /* setup for reading amidst mmap */ 1352 lseek(fd, file_offset + event->header.size, SEEK_SET); 1353 return tool->auxtrace(tool, event, session); 1354 case PERF_RECORD_AUXTRACE_ERROR: 1355 perf_session__auxtrace_error_inc(session, event); 1356 return tool->auxtrace_error(tool, event, session); 1357 case PERF_RECORD_THREAD_MAP: 1358 return tool->thread_map(tool, event, session); 1359 case PERF_RECORD_CPU_MAP: 1360 return tool->cpu_map(tool, event, session); 1361 case PERF_RECORD_STAT_CONFIG: 1362 return tool->stat_config(tool, event, session); 1363 case PERF_RECORD_STAT: 1364 return tool->stat(tool, event, session); 1365 case PERF_RECORD_STAT_ROUND: 1366 return tool->stat_round(tool, event, session); 1367 case PERF_RECORD_TIME_CONV: 1368 session->time_conv = event->time_conv; 1369 return tool->time_conv(tool, event, session); 1370 default: 1371 return -EINVAL; 1372 } 1373 } 1374 1375 int perf_session__deliver_synth_event(struct perf_session *session, 1376 union perf_event *event, 1377 struct perf_sample *sample) 1378 { 1379 struct perf_evlist *evlist = session->evlist; 1380 struct perf_tool *tool = session->tool; 1381 1382 events_stats__inc(&evlist->stats, event->header.type); 1383 1384 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1385 return perf_session__process_user_event(session, event, 0); 1386 1387 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0); 1388 } 1389 1390 static void event_swap(union perf_event *event, bool sample_id_all) 1391 { 1392 perf_event__swap_op swap; 1393 1394 swap = perf_event__swap_ops[event->header.type]; 1395 if (swap) 1396 swap(event, sample_id_all); 1397 } 1398 1399 int perf_session__peek_event(struct perf_session *session, off_t file_offset, 1400 void *buf, size_t buf_sz, 1401 union perf_event **event_ptr, 1402 struct perf_sample *sample) 1403 { 1404 union perf_event *event; 1405 size_t hdr_sz, rest; 1406 int fd; 1407 1408 if (session->one_mmap && !session->header.needs_swap) { 1409 event = file_offset - session->one_mmap_offset + 1410 session->one_mmap_addr; 1411 goto out_parse_sample; 1412 } 1413 1414 if (perf_data_file__is_pipe(session->file)) 1415 return -1; 1416 1417 fd = perf_data_file__fd(session->file); 1418 hdr_sz = sizeof(struct perf_event_header); 1419 1420 if (buf_sz < hdr_sz) 1421 return -1; 1422 1423 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 || 1424 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz) 1425 return -1; 1426 1427 event = (union perf_event *)buf; 1428 1429 if (session->header.needs_swap) 1430 perf_event_header__bswap(&event->header); 1431 1432 if (event->header.size < hdr_sz || event->header.size > buf_sz) 1433 return -1; 1434 1435 rest = event->header.size - hdr_sz; 1436 1437 if (readn(fd, buf, rest) != (ssize_t)rest) 1438 return -1; 1439 1440 if (session->header.needs_swap) 1441 event_swap(event, perf_evlist__sample_id_all(session->evlist)); 1442 1443 out_parse_sample: 1444 1445 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START && 1446 perf_evlist__parse_sample(session->evlist, event, sample)) 1447 return -1; 1448 1449 *event_ptr = event; 1450 1451 return 0; 1452 } 1453 1454 static s64 perf_session__process_event(struct perf_session *session, 1455 union perf_event *event, u64 file_offset) 1456 { 1457 struct perf_evlist *evlist = session->evlist; 1458 struct perf_tool *tool = session->tool; 1459 struct perf_sample sample; 1460 int ret; 1461 1462 if (session->header.needs_swap) 1463 event_swap(event, perf_evlist__sample_id_all(evlist)); 1464 1465 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1466 return -EINVAL; 1467 1468 events_stats__inc(&evlist->stats, event->header.type); 1469 1470 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1471 return perf_session__process_user_event(session, event, file_offset); 1472 1473 /* 1474 * For all kernel events we get the sample data 1475 */ 1476 ret = perf_evlist__parse_sample(evlist, event, &sample); 1477 if (ret) 1478 return ret; 1479 1480 if (tool->ordered_events) { 1481 ret = perf_session__queue_event(session, event, &sample, file_offset); 1482 if (ret != -ETIME) 1483 return ret; 1484 } 1485 1486 return perf_session__deliver_event(session, event, &sample, tool, 1487 file_offset); 1488 } 1489 1490 void perf_event_header__bswap(struct perf_event_header *hdr) 1491 { 1492 hdr->type = bswap_32(hdr->type); 1493 hdr->misc = bswap_16(hdr->misc); 1494 hdr->size = bswap_16(hdr->size); 1495 } 1496 1497 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1498 { 1499 return machine__findnew_thread(&session->machines.host, -1, pid); 1500 } 1501 1502 int perf_session__register_idle_thread(struct perf_session *session) 1503 { 1504 struct thread *thread; 1505 int err = 0; 1506 1507 thread = machine__findnew_thread(&session->machines.host, 0, 0); 1508 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) { 1509 pr_err("problem inserting idle task.\n"); 1510 err = -1; 1511 } 1512 1513 if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) { 1514 pr_err("problem inserting idle task.\n"); 1515 err = -1; 1516 } 1517 1518 /* machine__findnew_thread() got the thread, so put it */ 1519 thread__put(thread); 1520 return err; 1521 } 1522 1523 static void 1524 perf_session__warn_order(const struct perf_session *session) 1525 { 1526 const struct ordered_events *oe = &session->ordered_events; 1527 struct perf_evsel *evsel; 1528 bool should_warn = true; 1529 1530 evlist__for_each_entry(session->evlist, evsel) { 1531 if (evsel->attr.write_backward) 1532 should_warn = false; 1533 } 1534 1535 if (!should_warn) 1536 return; 1537 if (oe->nr_unordered_events != 0) 1538 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events); 1539 } 1540 1541 static void perf_session__warn_about_errors(const struct perf_session *session) 1542 { 1543 const struct events_stats *stats = &session->evlist->stats; 1544 1545 if (session->tool->lost == perf_event__process_lost && 1546 stats->nr_events[PERF_RECORD_LOST] != 0) { 1547 ui__warning("Processed %d events and lost %d chunks!\n\n" 1548 "Check IO/CPU overload!\n\n", 1549 stats->nr_events[0], 1550 stats->nr_events[PERF_RECORD_LOST]); 1551 } 1552 1553 if (session->tool->lost_samples == perf_event__process_lost_samples) { 1554 double drop_rate; 1555 1556 drop_rate = (double)stats->total_lost_samples / 1557 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples); 1558 if (drop_rate > 0.05) { 1559 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%% samples!\n\n", 1560 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples, 1561 drop_rate * 100.0); 1562 } 1563 } 1564 1565 if (session->tool->aux == perf_event__process_aux && 1566 stats->total_aux_lost != 0) { 1567 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n", 1568 stats->total_aux_lost, 1569 stats->nr_events[PERF_RECORD_AUX]); 1570 } 1571 1572 if (session->tool->aux == perf_event__process_aux && 1573 stats->total_aux_partial != 0) { 1574 bool vmm_exclusive = false; 1575 1576 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive", 1577 &vmm_exclusive); 1578 1579 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n" 1580 "Are you running a KVM guest in the background?%s\n\n", 1581 stats->total_aux_partial, 1582 stats->nr_events[PERF_RECORD_AUX], 1583 vmm_exclusive ? 1584 "\nReloading kvm_intel module with vmm_exclusive=0\n" 1585 "will reduce the gaps to only guest's timeslices." : 1586 ""); 1587 } 1588 1589 if (stats->nr_unknown_events != 0) { 1590 ui__warning("Found %u unknown events!\n\n" 1591 "Is this an older tool processing a perf.data " 1592 "file generated by a more recent tool?\n\n" 1593 "If that is not the case, consider " 1594 "reporting to linux-kernel@vger.kernel.org.\n\n", 1595 stats->nr_unknown_events); 1596 } 1597 1598 if (stats->nr_unknown_id != 0) { 1599 ui__warning("%u samples with id not present in the header\n", 1600 stats->nr_unknown_id); 1601 } 1602 1603 if (stats->nr_invalid_chains != 0) { 1604 ui__warning("Found invalid callchains!\n\n" 1605 "%u out of %u events were discarded for this reason.\n\n" 1606 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1607 stats->nr_invalid_chains, 1608 stats->nr_events[PERF_RECORD_SAMPLE]); 1609 } 1610 1611 if (stats->nr_unprocessable_samples != 0) { 1612 ui__warning("%u unprocessable samples recorded.\n" 1613 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1614 stats->nr_unprocessable_samples); 1615 } 1616 1617 perf_session__warn_order(session); 1618 1619 events_stats__auxtrace_error_warn(stats); 1620 1621 if (stats->nr_proc_map_timeout != 0) { 1622 ui__warning("%d map information files for pre-existing threads were\n" 1623 "not processed, if there are samples for addresses they\n" 1624 "will not be resolved, you may find out which are these\n" 1625 "threads by running with -v and redirecting the output\n" 1626 "to a file.\n" 1627 "The time limit to process proc map is too short?\n" 1628 "Increase it by --proc-map-timeout\n", 1629 stats->nr_proc_map_timeout); 1630 } 1631 } 1632 1633 static int perf_session__flush_thread_stack(struct thread *thread, 1634 void *p __maybe_unused) 1635 { 1636 return thread_stack__flush(thread); 1637 } 1638 1639 static int perf_session__flush_thread_stacks(struct perf_session *session) 1640 { 1641 return machines__for_each_thread(&session->machines, 1642 perf_session__flush_thread_stack, 1643 NULL); 1644 } 1645 1646 volatile int session_done; 1647 1648 static int __perf_session__process_pipe_events(struct perf_session *session) 1649 { 1650 struct ordered_events *oe = &session->ordered_events; 1651 struct perf_tool *tool = session->tool; 1652 int fd = perf_data_file__fd(session->file); 1653 union perf_event *event; 1654 uint32_t size, cur_size = 0; 1655 void *buf = NULL; 1656 s64 skip = 0; 1657 u64 head; 1658 ssize_t err; 1659 void *p; 1660 1661 perf_tool__fill_defaults(tool); 1662 1663 head = 0; 1664 cur_size = sizeof(union perf_event); 1665 1666 buf = malloc(cur_size); 1667 if (!buf) 1668 return -errno; 1669 ordered_events__set_copy_on_queue(oe, true); 1670 more: 1671 event = buf; 1672 err = readn(fd, event, sizeof(struct perf_event_header)); 1673 if (err <= 0) { 1674 if (err == 0) 1675 goto done; 1676 1677 pr_err("failed to read event header\n"); 1678 goto out_err; 1679 } 1680 1681 if (session->header.needs_swap) 1682 perf_event_header__bswap(&event->header); 1683 1684 size = event->header.size; 1685 if (size < sizeof(struct perf_event_header)) { 1686 pr_err("bad event header size\n"); 1687 goto out_err; 1688 } 1689 1690 if (size > cur_size) { 1691 void *new = realloc(buf, size); 1692 if (!new) { 1693 pr_err("failed to allocate memory to read event\n"); 1694 goto out_err; 1695 } 1696 buf = new; 1697 cur_size = size; 1698 event = buf; 1699 } 1700 p = event; 1701 p += sizeof(struct perf_event_header); 1702 1703 if (size - sizeof(struct perf_event_header)) { 1704 err = readn(fd, p, size - sizeof(struct perf_event_header)); 1705 if (err <= 0) { 1706 if (err == 0) { 1707 pr_err("unexpected end of event stream\n"); 1708 goto done; 1709 } 1710 1711 pr_err("failed to read event data\n"); 1712 goto out_err; 1713 } 1714 } 1715 1716 if ((skip = perf_session__process_event(session, event, head)) < 0) { 1717 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1718 head, event->header.size, event->header.type); 1719 err = -EINVAL; 1720 goto out_err; 1721 } 1722 1723 head += size; 1724 1725 if (skip > 0) 1726 head += skip; 1727 1728 if (!session_done()) 1729 goto more; 1730 done: 1731 /* do the final flush for ordered samples */ 1732 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 1733 if (err) 1734 goto out_err; 1735 err = auxtrace__flush_events(session, tool); 1736 if (err) 1737 goto out_err; 1738 err = perf_session__flush_thread_stacks(session); 1739 out_err: 1740 free(buf); 1741 perf_session__warn_about_errors(session); 1742 ordered_events__free(&session->ordered_events); 1743 auxtrace__free_events(session); 1744 return err; 1745 } 1746 1747 static union perf_event * 1748 fetch_mmaped_event(struct perf_session *session, 1749 u64 head, size_t mmap_size, char *buf) 1750 { 1751 union perf_event *event; 1752 1753 /* 1754 * Ensure we have enough space remaining to read 1755 * the size of the event in the headers. 1756 */ 1757 if (head + sizeof(event->header) > mmap_size) 1758 return NULL; 1759 1760 event = (union perf_event *)(buf + head); 1761 1762 if (session->header.needs_swap) 1763 perf_event_header__bswap(&event->header); 1764 1765 if (head + event->header.size > mmap_size) { 1766 /* We're not fetching the event so swap back again */ 1767 if (session->header.needs_swap) 1768 perf_event_header__bswap(&event->header); 1769 return NULL; 1770 } 1771 1772 return event; 1773 } 1774 1775 /* 1776 * On 64bit we can mmap the data file in one go. No need for tiny mmap 1777 * slices. On 32bit we use 32MB. 1778 */ 1779 #if BITS_PER_LONG == 64 1780 #define MMAP_SIZE ULLONG_MAX 1781 #define NUM_MMAPS 1 1782 #else 1783 #define MMAP_SIZE (32 * 1024 * 1024ULL) 1784 #define NUM_MMAPS 128 1785 #endif 1786 1787 static int __perf_session__process_events(struct perf_session *session, 1788 u64 data_offset, u64 data_size, 1789 u64 file_size) 1790 { 1791 struct ordered_events *oe = &session->ordered_events; 1792 struct perf_tool *tool = session->tool; 1793 int fd = perf_data_file__fd(session->file); 1794 u64 head, page_offset, file_offset, file_pos, size; 1795 int err, mmap_prot, mmap_flags, map_idx = 0; 1796 size_t mmap_size; 1797 char *buf, *mmaps[NUM_MMAPS]; 1798 union perf_event *event; 1799 struct ui_progress prog; 1800 s64 skip; 1801 1802 perf_tool__fill_defaults(tool); 1803 1804 page_offset = page_size * (data_offset / page_size); 1805 file_offset = page_offset; 1806 head = data_offset - page_offset; 1807 1808 if (data_size == 0) 1809 goto out; 1810 1811 if (data_offset + data_size < file_size) 1812 file_size = data_offset + data_size; 1813 1814 ui_progress__init(&prog, file_size, "Processing events..."); 1815 1816 mmap_size = MMAP_SIZE; 1817 if (mmap_size > file_size) { 1818 mmap_size = file_size; 1819 session->one_mmap = true; 1820 } 1821 1822 memset(mmaps, 0, sizeof(mmaps)); 1823 1824 mmap_prot = PROT_READ; 1825 mmap_flags = MAP_SHARED; 1826 1827 if (session->header.needs_swap) { 1828 mmap_prot |= PROT_WRITE; 1829 mmap_flags = MAP_PRIVATE; 1830 } 1831 remap: 1832 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd, 1833 file_offset); 1834 if (buf == MAP_FAILED) { 1835 pr_err("failed to mmap file\n"); 1836 err = -errno; 1837 goto out_err; 1838 } 1839 mmaps[map_idx] = buf; 1840 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 1841 file_pos = file_offset + head; 1842 if (session->one_mmap) { 1843 session->one_mmap_addr = buf; 1844 session->one_mmap_offset = file_offset; 1845 } 1846 1847 more: 1848 event = fetch_mmaped_event(session, head, mmap_size, buf); 1849 if (!event) { 1850 if (mmaps[map_idx]) { 1851 munmap(mmaps[map_idx], mmap_size); 1852 mmaps[map_idx] = NULL; 1853 } 1854 1855 page_offset = page_size * (head / page_size); 1856 file_offset += page_offset; 1857 head -= page_offset; 1858 goto remap; 1859 } 1860 1861 size = event->header.size; 1862 1863 if (size < sizeof(struct perf_event_header) || 1864 (skip = perf_session__process_event(session, event, file_pos)) < 0) { 1865 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1866 file_offset + head, event->header.size, 1867 event->header.type); 1868 err = -EINVAL; 1869 goto out_err; 1870 } 1871 1872 if (skip) 1873 size += skip; 1874 1875 head += size; 1876 file_pos += size; 1877 1878 ui_progress__update(&prog, size); 1879 1880 if (session_done()) 1881 goto out; 1882 1883 if (file_pos < file_size) 1884 goto more; 1885 1886 out: 1887 /* do the final flush for ordered samples */ 1888 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 1889 if (err) 1890 goto out_err; 1891 err = auxtrace__flush_events(session, tool); 1892 if (err) 1893 goto out_err; 1894 err = perf_session__flush_thread_stacks(session); 1895 out_err: 1896 ui_progress__finish(); 1897 perf_session__warn_about_errors(session); 1898 /* 1899 * We may switching perf.data output, make ordered_events 1900 * reusable. 1901 */ 1902 ordered_events__reinit(&session->ordered_events); 1903 auxtrace__free_events(session); 1904 session->one_mmap = false; 1905 return err; 1906 } 1907 1908 int perf_session__process_events(struct perf_session *session) 1909 { 1910 u64 size = perf_data_file__size(session->file); 1911 int err; 1912 1913 if (perf_session__register_idle_thread(session) < 0) 1914 return -ENOMEM; 1915 1916 if (!perf_data_file__is_pipe(session->file)) 1917 err = __perf_session__process_events(session, 1918 session->header.data_offset, 1919 session->header.data_size, size); 1920 else 1921 err = __perf_session__process_pipe_events(session); 1922 1923 return err; 1924 } 1925 1926 bool perf_session__has_traces(struct perf_session *session, const char *msg) 1927 { 1928 struct perf_evsel *evsel; 1929 1930 evlist__for_each_entry(session->evlist, evsel) { 1931 if (evsel->attr.type == PERF_TYPE_TRACEPOINT) 1932 return true; 1933 } 1934 1935 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 1936 return false; 1937 } 1938 1939 int maps__set_kallsyms_ref_reloc_sym(struct map **maps, 1940 const char *symbol_name, u64 addr) 1941 { 1942 char *bracket; 1943 int i; 1944 struct ref_reloc_sym *ref; 1945 1946 ref = zalloc(sizeof(struct ref_reloc_sym)); 1947 if (ref == NULL) 1948 return -ENOMEM; 1949 1950 ref->name = strdup(symbol_name); 1951 if (ref->name == NULL) { 1952 free(ref); 1953 return -ENOMEM; 1954 } 1955 1956 bracket = strchr(ref->name, ']'); 1957 if (bracket) 1958 *bracket = '\0'; 1959 1960 ref->addr = addr; 1961 1962 for (i = 0; i < MAP__NR_TYPES; ++i) { 1963 struct kmap *kmap = map__kmap(maps[i]); 1964 1965 if (!kmap) 1966 continue; 1967 kmap->ref_reloc_sym = ref; 1968 } 1969 1970 return 0; 1971 } 1972 1973 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp) 1974 { 1975 return machines__fprintf_dsos(&session->machines, fp); 1976 } 1977 1978 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp, 1979 bool (skip)(struct dso *dso, int parm), int parm) 1980 { 1981 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm); 1982 } 1983 1984 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 1985 { 1986 size_t ret; 1987 const char *msg = ""; 1988 1989 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE)) 1990 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)"; 1991 1992 ret = fprintf(fp, "\nAggregated stats:%s\n", msg); 1993 1994 ret += events_stats__fprintf(&session->evlist->stats, fp); 1995 return ret; 1996 } 1997 1998 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 1999 { 2000 /* 2001 * FIXME: Here we have to actually print all the machines in this 2002 * session, not just the host... 2003 */ 2004 return machine__fprintf(&session->machines.host, fp); 2005 } 2006 2007 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, 2008 unsigned int type) 2009 { 2010 struct perf_evsel *pos; 2011 2012 evlist__for_each_entry(session->evlist, pos) { 2013 if (pos->attr.type == type) 2014 return pos; 2015 } 2016 return NULL; 2017 } 2018 2019 int perf_session__cpu_bitmap(struct perf_session *session, 2020 const char *cpu_list, unsigned long *cpu_bitmap) 2021 { 2022 int i, err = -1; 2023 struct cpu_map *map; 2024 2025 for (i = 0; i < PERF_TYPE_MAX; ++i) { 2026 struct perf_evsel *evsel; 2027 2028 evsel = perf_session__find_first_evtype(session, i); 2029 if (!evsel) 2030 continue; 2031 2032 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) { 2033 pr_err("File does not contain CPU events. " 2034 "Remove -c option to proceed.\n"); 2035 return -1; 2036 } 2037 } 2038 2039 map = cpu_map__new(cpu_list); 2040 if (map == NULL) { 2041 pr_err("Invalid cpu_list\n"); 2042 return -1; 2043 } 2044 2045 for (i = 0; i < map->nr; i++) { 2046 int cpu = map->map[i]; 2047 2048 if (cpu >= MAX_NR_CPUS) { 2049 pr_err("Requested CPU %d too large. " 2050 "Consider raising MAX_NR_CPUS\n", cpu); 2051 goto out_delete_map; 2052 } 2053 2054 set_bit(cpu, cpu_bitmap); 2055 } 2056 2057 err = 0; 2058 2059 out_delete_map: 2060 cpu_map__put(map); 2061 return err; 2062 } 2063 2064 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 2065 bool full) 2066 { 2067 if (session == NULL || fp == NULL) 2068 return; 2069 2070 fprintf(fp, "# ========\n"); 2071 perf_header__fprintf_info(session, fp, full); 2072 fprintf(fp, "# ========\n#\n"); 2073 } 2074 2075 2076 int __perf_session__set_tracepoints_handlers(struct perf_session *session, 2077 const struct perf_evsel_str_handler *assocs, 2078 size_t nr_assocs) 2079 { 2080 struct perf_evsel *evsel; 2081 size_t i; 2082 int err; 2083 2084 for (i = 0; i < nr_assocs; i++) { 2085 /* 2086 * Adding a handler for an event not in the session, 2087 * just ignore it. 2088 */ 2089 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name); 2090 if (evsel == NULL) 2091 continue; 2092 2093 err = -EEXIST; 2094 if (evsel->handler != NULL) 2095 goto out; 2096 evsel->handler = assocs[i].handler; 2097 } 2098 2099 err = 0; 2100 out: 2101 return err; 2102 } 2103 2104 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused, 2105 union perf_event *event, 2106 struct perf_session *session) 2107 { 2108 struct perf_evlist *evlist = session->evlist; 2109 struct id_index_event *ie = &event->id_index; 2110 size_t i, nr, max_nr; 2111 2112 max_nr = (ie->header.size - sizeof(struct id_index_event)) / 2113 sizeof(struct id_index_entry); 2114 nr = ie->nr; 2115 if (nr > max_nr) 2116 return -EINVAL; 2117 2118 if (dump_trace) 2119 fprintf(stdout, " nr: %zu\n", nr); 2120 2121 for (i = 0; i < nr; i++) { 2122 struct id_index_entry *e = &ie->entries[i]; 2123 struct perf_sample_id *sid; 2124 2125 if (dump_trace) { 2126 fprintf(stdout, " ... id: %"PRIu64, e->id); 2127 fprintf(stdout, " idx: %"PRIu64, e->idx); 2128 fprintf(stdout, " cpu: %"PRId64, e->cpu); 2129 fprintf(stdout, " tid: %"PRId64"\n", e->tid); 2130 } 2131 2132 sid = perf_evlist__id2sid(evlist, e->id); 2133 if (!sid) 2134 return -ENOENT; 2135 sid->idx = e->idx; 2136 sid->cpu = e->cpu; 2137 sid->tid = e->tid; 2138 } 2139 return 0; 2140 } 2141 2142 int perf_event__synthesize_id_index(struct perf_tool *tool, 2143 perf_event__handler_t process, 2144 struct perf_evlist *evlist, 2145 struct machine *machine) 2146 { 2147 union perf_event *ev; 2148 struct perf_evsel *evsel; 2149 size_t nr = 0, i = 0, sz, max_nr, n; 2150 int err; 2151 2152 pr_debug2("Synthesizing id index\n"); 2153 2154 max_nr = (UINT16_MAX - sizeof(struct id_index_event)) / 2155 sizeof(struct id_index_entry); 2156 2157 evlist__for_each_entry(evlist, evsel) 2158 nr += evsel->ids; 2159 2160 n = nr > max_nr ? max_nr : nr; 2161 sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry); 2162 ev = zalloc(sz); 2163 if (!ev) 2164 return -ENOMEM; 2165 2166 ev->id_index.header.type = PERF_RECORD_ID_INDEX; 2167 ev->id_index.header.size = sz; 2168 ev->id_index.nr = n; 2169 2170 evlist__for_each_entry(evlist, evsel) { 2171 u32 j; 2172 2173 for (j = 0; j < evsel->ids; j++) { 2174 struct id_index_entry *e; 2175 struct perf_sample_id *sid; 2176 2177 if (i >= n) { 2178 err = process(tool, ev, NULL, machine); 2179 if (err) 2180 goto out_err; 2181 nr -= n; 2182 i = 0; 2183 } 2184 2185 e = &ev->id_index.entries[i++]; 2186 2187 e->id = evsel->id[j]; 2188 2189 sid = perf_evlist__id2sid(evlist, e->id); 2190 if (!sid) { 2191 free(ev); 2192 return -ENOENT; 2193 } 2194 2195 e->idx = sid->idx; 2196 e->cpu = sid->cpu; 2197 e->tid = sid->tid; 2198 } 2199 } 2200 2201 sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry); 2202 ev->id_index.header.size = sz; 2203 ev->id_index.nr = nr; 2204 2205 err = process(tool, ev, NULL, machine); 2206 out_err: 2207 free(ev); 2208 2209 return err; 2210 } 2211