1 #include <errno.h> 2 #include <inttypes.h> 3 #include <linux/kernel.h> 4 #include <traceevent/event-parse.h> 5 #include <api/fs/fs.h> 6 7 #include <byteswap.h> 8 #include <unistd.h> 9 #include <sys/types.h> 10 #include <sys/mman.h> 11 12 #include "evlist.h" 13 #include "evsel.h" 14 #include "session.h" 15 #include "tool.h" 16 #include "sort.h" 17 #include "util.h" 18 #include "cpumap.h" 19 #include "perf_regs.h" 20 #include "asm/bug.h" 21 #include "auxtrace.h" 22 #include "thread-stack.h" 23 #include "stat.h" 24 25 static int perf_session__deliver_event(struct perf_session *session, 26 union perf_event *event, 27 struct perf_sample *sample, 28 struct perf_tool *tool, 29 u64 file_offset); 30 31 static int perf_session__open(struct perf_session *session) 32 { 33 struct perf_data_file *file = session->file; 34 35 if (perf_session__read_header(session) < 0) { 36 pr_err("incompatible file format (rerun with -v to learn more)\n"); 37 return -1; 38 } 39 40 if (perf_data_file__is_pipe(file)) 41 return 0; 42 43 if (perf_header__has_feat(&session->header, HEADER_STAT)) 44 return 0; 45 46 if (!perf_evlist__valid_sample_type(session->evlist)) { 47 pr_err("non matching sample_type\n"); 48 return -1; 49 } 50 51 if (!perf_evlist__valid_sample_id_all(session->evlist)) { 52 pr_err("non matching sample_id_all\n"); 53 return -1; 54 } 55 56 if (!perf_evlist__valid_read_format(session->evlist)) { 57 pr_err("non matching read_format\n"); 58 return -1; 59 } 60 61 return 0; 62 } 63 64 void perf_session__set_id_hdr_size(struct perf_session *session) 65 { 66 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist); 67 68 machines__set_id_hdr_size(&session->machines, id_hdr_size); 69 } 70 71 int perf_session__create_kernel_maps(struct perf_session *session) 72 { 73 int ret = machine__create_kernel_maps(&session->machines.host); 74 75 if (ret >= 0) 76 ret = machines__create_guest_kernel_maps(&session->machines); 77 return ret; 78 } 79 80 static void perf_session__destroy_kernel_maps(struct perf_session *session) 81 { 82 machines__destroy_kernel_maps(&session->machines); 83 } 84 85 static bool perf_session__has_comm_exec(struct perf_session *session) 86 { 87 struct perf_evsel *evsel; 88 89 evlist__for_each_entry(session->evlist, evsel) { 90 if (evsel->attr.comm_exec) 91 return true; 92 } 93 94 return false; 95 } 96 97 static void perf_session__set_comm_exec(struct perf_session *session) 98 { 99 bool comm_exec = perf_session__has_comm_exec(session); 100 101 machines__set_comm_exec(&session->machines, comm_exec); 102 } 103 104 static int ordered_events__deliver_event(struct ordered_events *oe, 105 struct ordered_event *event) 106 { 107 struct perf_sample sample; 108 struct perf_session *session = container_of(oe, struct perf_session, 109 ordered_events); 110 int ret = perf_evlist__parse_sample(session->evlist, event->event, &sample); 111 112 if (ret) { 113 pr_err("Can't parse sample, err = %d\n", ret); 114 return ret; 115 } 116 117 return perf_session__deliver_event(session, event->event, &sample, 118 session->tool, event->file_offset); 119 } 120 121 struct perf_session *perf_session__new(struct perf_data_file *file, 122 bool repipe, struct perf_tool *tool) 123 { 124 struct perf_session *session = zalloc(sizeof(*session)); 125 126 if (!session) 127 goto out; 128 129 session->repipe = repipe; 130 session->tool = tool; 131 INIT_LIST_HEAD(&session->auxtrace_index); 132 machines__init(&session->machines); 133 ordered_events__init(&session->ordered_events, ordered_events__deliver_event); 134 135 if (file) { 136 if (perf_data_file__open(file)) 137 goto out_delete; 138 139 session->file = file; 140 141 if (perf_data_file__is_read(file)) { 142 if (perf_session__open(session) < 0) 143 goto out_close; 144 145 /* 146 * set session attributes that are present in perf.data 147 * but not in pipe-mode. 148 */ 149 if (!file->is_pipe) { 150 perf_session__set_id_hdr_size(session); 151 perf_session__set_comm_exec(session); 152 } 153 } 154 } else { 155 session->machines.host.env = &perf_env; 156 } 157 158 if (!file || perf_data_file__is_write(file)) { 159 /* 160 * In O_RDONLY mode this will be performed when reading the 161 * kernel MMAP event, in perf_event__process_mmap(). 162 */ 163 if (perf_session__create_kernel_maps(session) < 0) 164 pr_warning("Cannot read kernel map\n"); 165 } 166 167 /* 168 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is 169 * processed, so perf_evlist__sample_id_all is not meaningful here. 170 */ 171 if ((!file || !file->is_pipe) && tool && tool->ordering_requires_timestamps && 172 tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) { 173 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); 174 tool->ordered_events = false; 175 } 176 177 return session; 178 179 out_close: 180 perf_data_file__close(file); 181 out_delete: 182 perf_session__delete(session); 183 out: 184 return NULL; 185 } 186 187 static void perf_session__delete_threads(struct perf_session *session) 188 { 189 machine__delete_threads(&session->machines.host); 190 } 191 192 void perf_session__delete(struct perf_session *session) 193 { 194 if (session == NULL) 195 return; 196 auxtrace__free(session); 197 auxtrace_index__free(&session->auxtrace_index); 198 perf_session__destroy_kernel_maps(session); 199 perf_session__delete_threads(session); 200 perf_env__exit(&session->header.env); 201 machines__exit(&session->machines); 202 if (session->file) 203 perf_data_file__close(session->file); 204 free(session); 205 } 206 207 static int process_event_synth_tracing_data_stub(struct perf_tool *tool 208 __maybe_unused, 209 union perf_event *event 210 __maybe_unused, 211 struct perf_session *session 212 __maybe_unused) 213 { 214 dump_printf(": unhandled!\n"); 215 return 0; 216 } 217 218 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused, 219 union perf_event *event __maybe_unused, 220 struct perf_evlist **pevlist 221 __maybe_unused) 222 { 223 dump_printf(": unhandled!\n"); 224 return 0; 225 } 226 227 static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused, 228 union perf_event *event __maybe_unused, 229 struct perf_evlist **pevlist 230 __maybe_unused) 231 { 232 if (dump_trace) 233 perf_event__fprintf_event_update(event, stdout); 234 235 dump_printf(": unhandled!\n"); 236 return 0; 237 } 238 239 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused, 240 union perf_event *event __maybe_unused, 241 struct perf_sample *sample __maybe_unused, 242 struct perf_evsel *evsel __maybe_unused, 243 struct machine *machine __maybe_unused) 244 { 245 dump_printf(": unhandled!\n"); 246 return 0; 247 } 248 249 static int process_event_stub(struct perf_tool *tool __maybe_unused, 250 union perf_event *event __maybe_unused, 251 struct perf_sample *sample __maybe_unused, 252 struct machine *machine __maybe_unused) 253 { 254 dump_printf(": unhandled!\n"); 255 return 0; 256 } 257 258 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused, 259 union perf_event *event __maybe_unused, 260 struct ordered_events *oe __maybe_unused) 261 { 262 dump_printf(": unhandled!\n"); 263 return 0; 264 } 265 266 static int process_finished_round(struct perf_tool *tool, 267 union perf_event *event, 268 struct ordered_events *oe); 269 270 static int skipn(int fd, off_t n) 271 { 272 char buf[4096]; 273 ssize_t ret; 274 275 while (n > 0) { 276 ret = read(fd, buf, min(n, (off_t)sizeof(buf))); 277 if (ret <= 0) 278 return ret; 279 n -= ret; 280 } 281 282 return 0; 283 } 284 285 static s64 process_event_auxtrace_stub(struct perf_tool *tool __maybe_unused, 286 union perf_event *event, 287 struct perf_session *session 288 __maybe_unused) 289 { 290 dump_printf(": unhandled!\n"); 291 if (perf_data_file__is_pipe(session->file)) 292 skipn(perf_data_file__fd(session->file), event->auxtrace.size); 293 return event->auxtrace.size; 294 } 295 296 static int process_event_op2_stub(struct perf_tool *tool __maybe_unused, 297 union perf_event *event __maybe_unused, 298 struct perf_session *session __maybe_unused) 299 { 300 dump_printf(": unhandled!\n"); 301 return 0; 302 } 303 304 305 static 306 int process_event_thread_map_stub(struct perf_tool *tool __maybe_unused, 307 union perf_event *event __maybe_unused, 308 struct perf_session *session __maybe_unused) 309 { 310 if (dump_trace) 311 perf_event__fprintf_thread_map(event, stdout); 312 313 dump_printf(": unhandled!\n"); 314 return 0; 315 } 316 317 static 318 int process_event_cpu_map_stub(struct perf_tool *tool __maybe_unused, 319 union perf_event *event __maybe_unused, 320 struct perf_session *session __maybe_unused) 321 { 322 if (dump_trace) 323 perf_event__fprintf_cpu_map(event, stdout); 324 325 dump_printf(": unhandled!\n"); 326 return 0; 327 } 328 329 static 330 int process_event_stat_config_stub(struct perf_tool *tool __maybe_unused, 331 union perf_event *event __maybe_unused, 332 struct perf_session *session __maybe_unused) 333 { 334 if (dump_trace) 335 perf_event__fprintf_stat_config(event, stdout); 336 337 dump_printf(": unhandled!\n"); 338 return 0; 339 } 340 341 static int process_stat_stub(struct perf_tool *tool __maybe_unused, 342 union perf_event *event __maybe_unused, 343 struct perf_session *perf_session 344 __maybe_unused) 345 { 346 if (dump_trace) 347 perf_event__fprintf_stat(event, stdout); 348 349 dump_printf(": unhandled!\n"); 350 return 0; 351 } 352 353 static int process_stat_round_stub(struct perf_tool *tool __maybe_unused, 354 union perf_event *event __maybe_unused, 355 struct perf_session *perf_session 356 __maybe_unused) 357 { 358 if (dump_trace) 359 perf_event__fprintf_stat_round(event, stdout); 360 361 dump_printf(": unhandled!\n"); 362 return 0; 363 } 364 365 void perf_tool__fill_defaults(struct perf_tool *tool) 366 { 367 if (tool->sample == NULL) 368 tool->sample = process_event_sample_stub; 369 if (tool->mmap == NULL) 370 tool->mmap = process_event_stub; 371 if (tool->mmap2 == NULL) 372 tool->mmap2 = process_event_stub; 373 if (tool->comm == NULL) 374 tool->comm = process_event_stub; 375 if (tool->fork == NULL) 376 tool->fork = process_event_stub; 377 if (tool->exit == NULL) 378 tool->exit = process_event_stub; 379 if (tool->lost == NULL) 380 tool->lost = perf_event__process_lost; 381 if (tool->lost_samples == NULL) 382 tool->lost_samples = perf_event__process_lost_samples; 383 if (tool->aux == NULL) 384 tool->aux = perf_event__process_aux; 385 if (tool->itrace_start == NULL) 386 tool->itrace_start = perf_event__process_itrace_start; 387 if (tool->context_switch == NULL) 388 tool->context_switch = perf_event__process_switch; 389 if (tool->read == NULL) 390 tool->read = process_event_sample_stub; 391 if (tool->throttle == NULL) 392 tool->throttle = process_event_stub; 393 if (tool->unthrottle == NULL) 394 tool->unthrottle = process_event_stub; 395 if (tool->attr == NULL) 396 tool->attr = process_event_synth_attr_stub; 397 if (tool->event_update == NULL) 398 tool->event_update = process_event_synth_event_update_stub; 399 if (tool->tracing_data == NULL) 400 tool->tracing_data = process_event_synth_tracing_data_stub; 401 if (tool->build_id == NULL) 402 tool->build_id = process_event_op2_stub; 403 if (tool->finished_round == NULL) { 404 if (tool->ordered_events) 405 tool->finished_round = process_finished_round; 406 else 407 tool->finished_round = process_finished_round_stub; 408 } 409 if (tool->id_index == NULL) 410 tool->id_index = process_event_op2_stub; 411 if (tool->auxtrace_info == NULL) 412 tool->auxtrace_info = process_event_op2_stub; 413 if (tool->auxtrace == NULL) 414 tool->auxtrace = process_event_auxtrace_stub; 415 if (tool->auxtrace_error == NULL) 416 tool->auxtrace_error = process_event_op2_stub; 417 if (tool->thread_map == NULL) 418 tool->thread_map = process_event_thread_map_stub; 419 if (tool->cpu_map == NULL) 420 tool->cpu_map = process_event_cpu_map_stub; 421 if (tool->stat_config == NULL) 422 tool->stat_config = process_event_stat_config_stub; 423 if (tool->stat == NULL) 424 tool->stat = process_stat_stub; 425 if (tool->stat_round == NULL) 426 tool->stat_round = process_stat_round_stub; 427 if (tool->time_conv == NULL) 428 tool->time_conv = process_event_op2_stub; 429 } 430 431 static void swap_sample_id_all(union perf_event *event, void *data) 432 { 433 void *end = (void *) event + event->header.size; 434 int size = end - data; 435 436 BUG_ON(size % sizeof(u64)); 437 mem_bswap_64(data, size); 438 } 439 440 static void perf_event__all64_swap(union perf_event *event, 441 bool sample_id_all __maybe_unused) 442 { 443 struct perf_event_header *hdr = &event->header; 444 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 445 } 446 447 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 448 { 449 event->comm.pid = bswap_32(event->comm.pid); 450 event->comm.tid = bswap_32(event->comm.tid); 451 452 if (sample_id_all) { 453 void *data = &event->comm.comm; 454 455 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 456 swap_sample_id_all(event, data); 457 } 458 } 459 460 static void perf_event__mmap_swap(union perf_event *event, 461 bool sample_id_all) 462 { 463 event->mmap.pid = bswap_32(event->mmap.pid); 464 event->mmap.tid = bswap_32(event->mmap.tid); 465 event->mmap.start = bswap_64(event->mmap.start); 466 event->mmap.len = bswap_64(event->mmap.len); 467 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 468 469 if (sample_id_all) { 470 void *data = &event->mmap.filename; 471 472 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 473 swap_sample_id_all(event, data); 474 } 475 } 476 477 static void perf_event__mmap2_swap(union perf_event *event, 478 bool sample_id_all) 479 { 480 event->mmap2.pid = bswap_32(event->mmap2.pid); 481 event->mmap2.tid = bswap_32(event->mmap2.tid); 482 event->mmap2.start = bswap_64(event->mmap2.start); 483 event->mmap2.len = bswap_64(event->mmap2.len); 484 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); 485 event->mmap2.maj = bswap_32(event->mmap2.maj); 486 event->mmap2.min = bswap_32(event->mmap2.min); 487 event->mmap2.ino = bswap_64(event->mmap2.ino); 488 489 if (sample_id_all) { 490 void *data = &event->mmap2.filename; 491 492 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 493 swap_sample_id_all(event, data); 494 } 495 } 496 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 497 { 498 event->fork.pid = bswap_32(event->fork.pid); 499 event->fork.tid = bswap_32(event->fork.tid); 500 event->fork.ppid = bswap_32(event->fork.ppid); 501 event->fork.ptid = bswap_32(event->fork.ptid); 502 event->fork.time = bswap_64(event->fork.time); 503 504 if (sample_id_all) 505 swap_sample_id_all(event, &event->fork + 1); 506 } 507 508 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 509 { 510 event->read.pid = bswap_32(event->read.pid); 511 event->read.tid = bswap_32(event->read.tid); 512 event->read.value = bswap_64(event->read.value); 513 event->read.time_enabled = bswap_64(event->read.time_enabled); 514 event->read.time_running = bswap_64(event->read.time_running); 515 event->read.id = bswap_64(event->read.id); 516 517 if (sample_id_all) 518 swap_sample_id_all(event, &event->read + 1); 519 } 520 521 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all) 522 { 523 event->aux.aux_offset = bswap_64(event->aux.aux_offset); 524 event->aux.aux_size = bswap_64(event->aux.aux_size); 525 event->aux.flags = bswap_64(event->aux.flags); 526 527 if (sample_id_all) 528 swap_sample_id_all(event, &event->aux + 1); 529 } 530 531 static void perf_event__itrace_start_swap(union perf_event *event, 532 bool sample_id_all) 533 { 534 event->itrace_start.pid = bswap_32(event->itrace_start.pid); 535 event->itrace_start.tid = bswap_32(event->itrace_start.tid); 536 537 if (sample_id_all) 538 swap_sample_id_all(event, &event->itrace_start + 1); 539 } 540 541 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all) 542 { 543 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) { 544 event->context_switch.next_prev_pid = 545 bswap_32(event->context_switch.next_prev_pid); 546 event->context_switch.next_prev_tid = 547 bswap_32(event->context_switch.next_prev_tid); 548 } 549 550 if (sample_id_all) 551 swap_sample_id_all(event, &event->context_switch + 1); 552 } 553 554 static void perf_event__throttle_swap(union perf_event *event, 555 bool sample_id_all) 556 { 557 event->throttle.time = bswap_64(event->throttle.time); 558 event->throttle.id = bswap_64(event->throttle.id); 559 event->throttle.stream_id = bswap_64(event->throttle.stream_id); 560 561 if (sample_id_all) 562 swap_sample_id_all(event, &event->throttle + 1); 563 } 564 565 static u8 revbyte(u8 b) 566 { 567 int rev = (b >> 4) | ((b & 0xf) << 4); 568 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 569 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 570 return (u8) rev; 571 } 572 573 /* 574 * XXX this is hack in attempt to carry flags bitfield 575 * through endian village. ABI says: 576 * 577 * Bit-fields are allocated from right to left (least to most significant) 578 * on little-endian implementations and from left to right (most to least 579 * significant) on big-endian implementations. 580 * 581 * The above seems to be byte specific, so we need to reverse each 582 * byte of the bitfield. 'Internet' also says this might be implementation 583 * specific and we probably need proper fix and carry perf_event_attr 584 * bitfield flags in separate data file FEAT_ section. Thought this seems 585 * to work for now. 586 */ 587 static void swap_bitfield(u8 *p, unsigned len) 588 { 589 unsigned i; 590 591 for (i = 0; i < len; i++) { 592 *p = revbyte(*p); 593 p++; 594 } 595 } 596 597 /* exported for swapping attributes in file header */ 598 void perf_event__attr_swap(struct perf_event_attr *attr) 599 { 600 attr->type = bswap_32(attr->type); 601 attr->size = bswap_32(attr->size); 602 603 #define bswap_safe(f, n) \ 604 (attr->size > (offsetof(struct perf_event_attr, f) + \ 605 sizeof(attr->f) * (n))) 606 #define bswap_field(f, sz) \ 607 do { \ 608 if (bswap_safe(f, 0)) \ 609 attr->f = bswap_##sz(attr->f); \ 610 } while(0) 611 #define bswap_field_16(f) bswap_field(f, 16) 612 #define bswap_field_32(f) bswap_field(f, 32) 613 #define bswap_field_64(f) bswap_field(f, 64) 614 615 bswap_field_64(config); 616 bswap_field_64(sample_period); 617 bswap_field_64(sample_type); 618 bswap_field_64(read_format); 619 bswap_field_32(wakeup_events); 620 bswap_field_32(bp_type); 621 bswap_field_64(bp_addr); 622 bswap_field_64(bp_len); 623 bswap_field_64(branch_sample_type); 624 bswap_field_64(sample_regs_user); 625 bswap_field_32(sample_stack_user); 626 bswap_field_32(aux_watermark); 627 bswap_field_16(sample_max_stack); 628 629 /* 630 * After read_format are bitfields. Check read_format because 631 * we are unable to use offsetof on bitfield. 632 */ 633 if (bswap_safe(read_format, 1)) 634 swap_bitfield((u8 *) (&attr->read_format + 1), 635 sizeof(u64)); 636 #undef bswap_field_64 637 #undef bswap_field_32 638 #undef bswap_field 639 #undef bswap_safe 640 } 641 642 static void perf_event__hdr_attr_swap(union perf_event *event, 643 bool sample_id_all __maybe_unused) 644 { 645 size_t size; 646 647 perf_event__attr_swap(&event->attr.attr); 648 649 size = event->header.size; 650 size -= (void *)&event->attr.id - (void *)event; 651 mem_bswap_64(event->attr.id, size); 652 } 653 654 static void perf_event__event_update_swap(union perf_event *event, 655 bool sample_id_all __maybe_unused) 656 { 657 event->event_update.type = bswap_64(event->event_update.type); 658 event->event_update.id = bswap_64(event->event_update.id); 659 } 660 661 static void perf_event__event_type_swap(union perf_event *event, 662 bool sample_id_all __maybe_unused) 663 { 664 event->event_type.event_type.event_id = 665 bswap_64(event->event_type.event_type.event_id); 666 } 667 668 static void perf_event__tracing_data_swap(union perf_event *event, 669 bool sample_id_all __maybe_unused) 670 { 671 event->tracing_data.size = bswap_32(event->tracing_data.size); 672 } 673 674 static void perf_event__auxtrace_info_swap(union perf_event *event, 675 bool sample_id_all __maybe_unused) 676 { 677 size_t size; 678 679 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type); 680 681 size = event->header.size; 682 size -= (void *)&event->auxtrace_info.priv - (void *)event; 683 mem_bswap_64(event->auxtrace_info.priv, size); 684 } 685 686 static void perf_event__auxtrace_swap(union perf_event *event, 687 bool sample_id_all __maybe_unused) 688 { 689 event->auxtrace.size = bswap_64(event->auxtrace.size); 690 event->auxtrace.offset = bswap_64(event->auxtrace.offset); 691 event->auxtrace.reference = bswap_64(event->auxtrace.reference); 692 event->auxtrace.idx = bswap_32(event->auxtrace.idx); 693 event->auxtrace.tid = bswap_32(event->auxtrace.tid); 694 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu); 695 } 696 697 static void perf_event__auxtrace_error_swap(union perf_event *event, 698 bool sample_id_all __maybe_unused) 699 { 700 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type); 701 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code); 702 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu); 703 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid); 704 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid); 705 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip); 706 } 707 708 static void perf_event__thread_map_swap(union perf_event *event, 709 bool sample_id_all __maybe_unused) 710 { 711 unsigned i; 712 713 event->thread_map.nr = bswap_64(event->thread_map.nr); 714 715 for (i = 0; i < event->thread_map.nr; i++) 716 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid); 717 } 718 719 static void perf_event__cpu_map_swap(union perf_event *event, 720 bool sample_id_all __maybe_unused) 721 { 722 struct cpu_map_data *data = &event->cpu_map.data; 723 struct cpu_map_entries *cpus; 724 struct cpu_map_mask *mask; 725 unsigned i; 726 727 data->type = bswap_64(data->type); 728 729 switch (data->type) { 730 case PERF_CPU_MAP__CPUS: 731 cpus = (struct cpu_map_entries *)data->data; 732 733 cpus->nr = bswap_16(cpus->nr); 734 735 for (i = 0; i < cpus->nr; i++) 736 cpus->cpu[i] = bswap_16(cpus->cpu[i]); 737 break; 738 case PERF_CPU_MAP__MASK: 739 mask = (struct cpu_map_mask *) data->data; 740 741 mask->nr = bswap_16(mask->nr); 742 mask->long_size = bswap_16(mask->long_size); 743 744 switch (mask->long_size) { 745 case 4: mem_bswap_32(&mask->mask, mask->nr); break; 746 case 8: mem_bswap_64(&mask->mask, mask->nr); break; 747 default: 748 pr_err("cpu_map swap: unsupported long size\n"); 749 } 750 default: 751 break; 752 } 753 } 754 755 static void perf_event__stat_config_swap(union perf_event *event, 756 bool sample_id_all __maybe_unused) 757 { 758 u64 size; 759 760 size = event->stat_config.nr * sizeof(event->stat_config.data[0]); 761 size += 1; /* nr item itself */ 762 mem_bswap_64(&event->stat_config.nr, size); 763 } 764 765 static void perf_event__stat_swap(union perf_event *event, 766 bool sample_id_all __maybe_unused) 767 { 768 event->stat.id = bswap_64(event->stat.id); 769 event->stat.thread = bswap_32(event->stat.thread); 770 event->stat.cpu = bswap_32(event->stat.cpu); 771 event->stat.val = bswap_64(event->stat.val); 772 event->stat.ena = bswap_64(event->stat.ena); 773 event->stat.run = bswap_64(event->stat.run); 774 } 775 776 static void perf_event__stat_round_swap(union perf_event *event, 777 bool sample_id_all __maybe_unused) 778 { 779 event->stat_round.type = bswap_64(event->stat_round.type); 780 event->stat_round.time = bswap_64(event->stat_round.time); 781 } 782 783 typedef void (*perf_event__swap_op)(union perf_event *event, 784 bool sample_id_all); 785 786 static perf_event__swap_op perf_event__swap_ops[] = { 787 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 788 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap, 789 [PERF_RECORD_COMM] = perf_event__comm_swap, 790 [PERF_RECORD_FORK] = perf_event__task_swap, 791 [PERF_RECORD_EXIT] = perf_event__task_swap, 792 [PERF_RECORD_LOST] = perf_event__all64_swap, 793 [PERF_RECORD_READ] = perf_event__read_swap, 794 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap, 795 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap, 796 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 797 [PERF_RECORD_AUX] = perf_event__aux_swap, 798 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap, 799 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap, 800 [PERF_RECORD_SWITCH] = perf_event__switch_swap, 801 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap, 802 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 803 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 804 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 805 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 806 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap, 807 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap, 808 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap, 809 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap, 810 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap, 811 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap, 812 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap, 813 [PERF_RECORD_STAT] = perf_event__stat_swap, 814 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap, 815 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap, 816 [PERF_RECORD_TIME_CONV] = perf_event__all64_swap, 817 [PERF_RECORD_HEADER_MAX] = NULL, 818 }; 819 820 /* 821 * When perf record finishes a pass on every buffers, it records this pseudo 822 * event. 823 * We record the max timestamp t found in the pass n. 824 * Assuming these timestamps are monotonic across cpus, we know that if 825 * a buffer still has events with timestamps below t, they will be all 826 * available and then read in the pass n + 1. 827 * Hence when we start to read the pass n + 2, we can safely flush every 828 * events with timestamps below t. 829 * 830 * ============ PASS n ================= 831 * CPU 0 | CPU 1 832 * | 833 * cnt1 timestamps | cnt2 timestamps 834 * 1 | 2 835 * 2 | 3 836 * - | 4 <--- max recorded 837 * 838 * ============ PASS n + 1 ============== 839 * CPU 0 | CPU 1 840 * | 841 * cnt1 timestamps | cnt2 timestamps 842 * 3 | 5 843 * 4 | 6 844 * 5 | 7 <---- max recorded 845 * 846 * Flush every events below timestamp 4 847 * 848 * ============ PASS n + 2 ============== 849 * CPU 0 | CPU 1 850 * | 851 * cnt1 timestamps | cnt2 timestamps 852 * 6 | 8 853 * 7 | 9 854 * - | 10 855 * 856 * Flush every events below timestamp 7 857 * etc... 858 */ 859 static int process_finished_round(struct perf_tool *tool __maybe_unused, 860 union perf_event *event __maybe_unused, 861 struct ordered_events *oe) 862 { 863 if (dump_trace) 864 fprintf(stdout, "\n"); 865 return ordered_events__flush(oe, OE_FLUSH__ROUND); 866 } 867 868 int perf_session__queue_event(struct perf_session *s, union perf_event *event, 869 struct perf_sample *sample, u64 file_offset) 870 { 871 return ordered_events__queue(&s->ordered_events, event, sample, file_offset); 872 } 873 874 static void callchain__lbr_callstack_printf(struct perf_sample *sample) 875 { 876 struct ip_callchain *callchain = sample->callchain; 877 struct branch_stack *lbr_stack = sample->branch_stack; 878 u64 kernel_callchain_nr = callchain->nr; 879 unsigned int i; 880 881 for (i = 0; i < kernel_callchain_nr; i++) { 882 if (callchain->ips[i] == PERF_CONTEXT_USER) 883 break; 884 } 885 886 if ((i != kernel_callchain_nr) && lbr_stack->nr) { 887 u64 total_nr; 888 /* 889 * LBR callstack can only get user call chain, 890 * i is kernel call chain number, 891 * 1 is PERF_CONTEXT_USER. 892 * 893 * The user call chain is stored in LBR registers. 894 * LBR are pair registers. The caller is stored 895 * in "from" register, while the callee is stored 896 * in "to" register. 897 * For example, there is a call stack 898 * "A"->"B"->"C"->"D". 899 * The LBR registers will recorde like 900 * "C"->"D", "B"->"C", "A"->"B". 901 * So only the first "to" register and all "from" 902 * registers are needed to construct the whole stack. 903 */ 904 total_nr = i + 1 + lbr_stack->nr + 1; 905 kernel_callchain_nr = i + 1; 906 907 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr); 908 909 for (i = 0; i < kernel_callchain_nr; i++) 910 printf("..... %2d: %016" PRIx64 "\n", 911 i, callchain->ips[i]); 912 913 printf("..... %2d: %016" PRIx64 "\n", 914 (int)(kernel_callchain_nr), lbr_stack->entries[0].to); 915 for (i = 0; i < lbr_stack->nr; i++) 916 printf("..... %2d: %016" PRIx64 "\n", 917 (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from); 918 } 919 } 920 921 static void callchain__printf(struct perf_evsel *evsel, 922 struct perf_sample *sample) 923 { 924 unsigned int i; 925 struct ip_callchain *callchain = sample->callchain; 926 927 if (perf_evsel__has_branch_callstack(evsel)) 928 callchain__lbr_callstack_printf(sample); 929 930 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr); 931 932 for (i = 0; i < callchain->nr; i++) 933 printf("..... %2d: %016" PRIx64 "\n", 934 i, callchain->ips[i]); 935 } 936 937 static void branch_stack__printf(struct perf_sample *sample) 938 { 939 uint64_t i; 940 941 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr); 942 943 for (i = 0; i < sample->branch_stack->nr; i++) { 944 struct branch_entry *e = &sample->branch_stack->entries[i]; 945 946 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n", 947 i, e->from, e->to, 948 (unsigned short)e->flags.cycles, 949 e->flags.mispred ? "M" : " ", 950 e->flags.predicted ? "P" : " ", 951 e->flags.abort ? "A" : " ", 952 e->flags.in_tx ? "T" : " ", 953 (unsigned)e->flags.reserved); 954 } 955 } 956 957 static void regs_dump__printf(u64 mask, u64 *regs) 958 { 959 unsigned rid, i = 0; 960 961 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { 962 u64 val = regs[i++]; 963 964 printf(".... %-5s 0x%" PRIx64 "\n", 965 perf_reg_name(rid), val); 966 } 967 } 968 969 static const char *regs_abi[] = { 970 [PERF_SAMPLE_REGS_ABI_NONE] = "none", 971 [PERF_SAMPLE_REGS_ABI_32] = "32-bit", 972 [PERF_SAMPLE_REGS_ABI_64] = "64-bit", 973 }; 974 975 static inline const char *regs_dump_abi(struct regs_dump *d) 976 { 977 if (d->abi > PERF_SAMPLE_REGS_ABI_64) 978 return "unknown"; 979 980 return regs_abi[d->abi]; 981 } 982 983 static void regs__printf(const char *type, struct regs_dump *regs) 984 { 985 u64 mask = regs->mask; 986 987 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n", 988 type, 989 mask, 990 regs_dump_abi(regs)); 991 992 regs_dump__printf(mask, regs->regs); 993 } 994 995 static void regs_user__printf(struct perf_sample *sample) 996 { 997 struct regs_dump *user_regs = &sample->user_regs; 998 999 if (user_regs->regs) 1000 regs__printf("user", user_regs); 1001 } 1002 1003 static void regs_intr__printf(struct perf_sample *sample) 1004 { 1005 struct regs_dump *intr_regs = &sample->intr_regs; 1006 1007 if (intr_regs->regs) 1008 regs__printf("intr", intr_regs); 1009 } 1010 1011 static void stack_user__printf(struct stack_dump *dump) 1012 { 1013 printf("... ustack: size %" PRIu64 ", offset 0x%x\n", 1014 dump->size, dump->offset); 1015 } 1016 1017 static void perf_evlist__print_tstamp(struct perf_evlist *evlist, 1018 union perf_event *event, 1019 struct perf_sample *sample) 1020 { 1021 u64 sample_type = __perf_evlist__combined_sample_type(evlist); 1022 1023 if (event->header.type != PERF_RECORD_SAMPLE && 1024 !perf_evlist__sample_id_all(evlist)) { 1025 fputs("-1 -1 ", stdout); 1026 return; 1027 } 1028 1029 if ((sample_type & PERF_SAMPLE_CPU)) 1030 printf("%u ", sample->cpu); 1031 1032 if (sample_type & PERF_SAMPLE_TIME) 1033 printf("%" PRIu64 " ", sample->time); 1034 } 1035 1036 static void sample_read__printf(struct perf_sample *sample, u64 read_format) 1037 { 1038 printf("... sample_read:\n"); 1039 1040 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1041 printf("...... time enabled %016" PRIx64 "\n", 1042 sample->read.time_enabled); 1043 1044 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1045 printf("...... time running %016" PRIx64 "\n", 1046 sample->read.time_running); 1047 1048 if (read_format & PERF_FORMAT_GROUP) { 1049 u64 i; 1050 1051 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr); 1052 1053 for (i = 0; i < sample->read.group.nr; i++) { 1054 struct sample_read_value *value; 1055 1056 value = &sample->read.group.values[i]; 1057 printf("..... id %016" PRIx64 1058 ", value %016" PRIx64 "\n", 1059 value->id, value->value); 1060 } 1061 } else 1062 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n", 1063 sample->read.one.id, sample->read.one.value); 1064 } 1065 1066 static void dump_event(struct perf_evlist *evlist, union perf_event *event, 1067 u64 file_offset, struct perf_sample *sample) 1068 { 1069 if (!dump_trace) 1070 return; 1071 1072 printf("\n%#" PRIx64 " [%#x]: event: %d\n", 1073 file_offset, event->header.size, event->header.type); 1074 1075 trace_event(event); 1076 1077 if (sample) 1078 perf_evlist__print_tstamp(evlist, event, sample); 1079 1080 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 1081 event->header.size, perf_event__name(event->header.type)); 1082 } 1083 1084 static void dump_sample(struct perf_evsel *evsel, union perf_event *event, 1085 struct perf_sample *sample) 1086 { 1087 u64 sample_type; 1088 1089 if (!dump_trace) 1090 return; 1091 1092 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 1093 event->header.misc, sample->pid, sample->tid, sample->ip, 1094 sample->period, sample->addr); 1095 1096 sample_type = evsel->attr.sample_type; 1097 1098 if (sample_type & PERF_SAMPLE_CALLCHAIN) 1099 callchain__printf(evsel, sample); 1100 1101 if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !perf_evsel__has_branch_callstack(evsel)) 1102 branch_stack__printf(sample); 1103 1104 if (sample_type & PERF_SAMPLE_REGS_USER) 1105 regs_user__printf(sample); 1106 1107 if (sample_type & PERF_SAMPLE_REGS_INTR) 1108 regs_intr__printf(sample); 1109 1110 if (sample_type & PERF_SAMPLE_STACK_USER) 1111 stack_user__printf(&sample->user_stack); 1112 1113 if (sample_type & PERF_SAMPLE_WEIGHT) 1114 printf("... weight: %" PRIu64 "\n", sample->weight); 1115 1116 if (sample_type & PERF_SAMPLE_DATA_SRC) 1117 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src); 1118 1119 if (sample_type & PERF_SAMPLE_TRANSACTION) 1120 printf("... transaction: %" PRIx64 "\n", sample->transaction); 1121 1122 if (sample_type & PERF_SAMPLE_READ) 1123 sample_read__printf(sample, evsel->attr.read_format); 1124 } 1125 1126 static struct machine *machines__find_for_cpumode(struct machines *machines, 1127 union perf_event *event, 1128 struct perf_sample *sample) 1129 { 1130 struct machine *machine; 1131 1132 if (perf_guest && 1133 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 1134 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) { 1135 u32 pid; 1136 1137 if (event->header.type == PERF_RECORD_MMAP 1138 || event->header.type == PERF_RECORD_MMAP2) 1139 pid = event->mmap.pid; 1140 else 1141 pid = sample->pid; 1142 1143 machine = machines__find(machines, pid); 1144 if (!machine) 1145 machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID); 1146 return machine; 1147 } 1148 1149 return &machines->host; 1150 } 1151 1152 static int deliver_sample_value(struct perf_evlist *evlist, 1153 struct perf_tool *tool, 1154 union perf_event *event, 1155 struct perf_sample *sample, 1156 struct sample_read_value *v, 1157 struct machine *machine) 1158 { 1159 struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id); 1160 1161 if (sid) { 1162 sample->id = v->id; 1163 sample->period = v->value - sid->period; 1164 sid->period = v->value; 1165 } 1166 1167 if (!sid || sid->evsel == NULL) { 1168 ++evlist->stats.nr_unknown_id; 1169 return 0; 1170 } 1171 1172 return tool->sample(tool, event, sample, sid->evsel, machine); 1173 } 1174 1175 static int deliver_sample_group(struct perf_evlist *evlist, 1176 struct perf_tool *tool, 1177 union perf_event *event, 1178 struct perf_sample *sample, 1179 struct machine *machine) 1180 { 1181 int ret = -EINVAL; 1182 u64 i; 1183 1184 for (i = 0; i < sample->read.group.nr; i++) { 1185 ret = deliver_sample_value(evlist, tool, event, sample, 1186 &sample->read.group.values[i], 1187 machine); 1188 if (ret) 1189 break; 1190 } 1191 1192 return ret; 1193 } 1194 1195 static int 1196 perf_evlist__deliver_sample(struct perf_evlist *evlist, 1197 struct perf_tool *tool, 1198 union perf_event *event, 1199 struct perf_sample *sample, 1200 struct perf_evsel *evsel, 1201 struct machine *machine) 1202 { 1203 /* We know evsel != NULL. */ 1204 u64 sample_type = evsel->attr.sample_type; 1205 u64 read_format = evsel->attr.read_format; 1206 1207 /* Standard sample delivery. */ 1208 if (!(sample_type & PERF_SAMPLE_READ)) 1209 return tool->sample(tool, event, sample, evsel, machine); 1210 1211 /* For PERF_SAMPLE_READ we have either single or group mode. */ 1212 if (read_format & PERF_FORMAT_GROUP) 1213 return deliver_sample_group(evlist, tool, event, sample, 1214 machine); 1215 else 1216 return deliver_sample_value(evlist, tool, event, sample, 1217 &sample->read.one, machine); 1218 } 1219 1220 static int machines__deliver_event(struct machines *machines, 1221 struct perf_evlist *evlist, 1222 union perf_event *event, 1223 struct perf_sample *sample, 1224 struct perf_tool *tool, u64 file_offset) 1225 { 1226 struct perf_evsel *evsel; 1227 struct machine *machine; 1228 1229 dump_event(evlist, event, file_offset, sample); 1230 1231 evsel = perf_evlist__id2evsel(evlist, sample->id); 1232 1233 machine = machines__find_for_cpumode(machines, event, sample); 1234 1235 switch (event->header.type) { 1236 case PERF_RECORD_SAMPLE: 1237 if (evsel == NULL) { 1238 ++evlist->stats.nr_unknown_id; 1239 return 0; 1240 } 1241 dump_sample(evsel, event, sample); 1242 if (machine == NULL) { 1243 ++evlist->stats.nr_unprocessable_samples; 1244 return 0; 1245 } 1246 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine); 1247 case PERF_RECORD_MMAP: 1248 return tool->mmap(tool, event, sample, machine); 1249 case PERF_RECORD_MMAP2: 1250 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT) 1251 ++evlist->stats.nr_proc_map_timeout; 1252 return tool->mmap2(tool, event, sample, machine); 1253 case PERF_RECORD_COMM: 1254 return tool->comm(tool, event, sample, machine); 1255 case PERF_RECORD_NAMESPACES: 1256 return tool->namespaces(tool, event, sample, machine); 1257 case PERF_RECORD_FORK: 1258 return tool->fork(tool, event, sample, machine); 1259 case PERF_RECORD_EXIT: 1260 return tool->exit(tool, event, sample, machine); 1261 case PERF_RECORD_LOST: 1262 if (tool->lost == perf_event__process_lost) 1263 evlist->stats.total_lost += event->lost.lost; 1264 return tool->lost(tool, event, sample, machine); 1265 case PERF_RECORD_LOST_SAMPLES: 1266 if (tool->lost_samples == perf_event__process_lost_samples) 1267 evlist->stats.total_lost_samples += event->lost_samples.lost; 1268 return tool->lost_samples(tool, event, sample, machine); 1269 case PERF_RECORD_READ: 1270 return tool->read(tool, event, sample, evsel, machine); 1271 case PERF_RECORD_THROTTLE: 1272 return tool->throttle(tool, event, sample, machine); 1273 case PERF_RECORD_UNTHROTTLE: 1274 return tool->unthrottle(tool, event, sample, machine); 1275 case PERF_RECORD_AUX: 1276 if (tool->aux == perf_event__process_aux) { 1277 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) 1278 evlist->stats.total_aux_lost += 1; 1279 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL) 1280 evlist->stats.total_aux_partial += 1; 1281 } 1282 return tool->aux(tool, event, sample, machine); 1283 case PERF_RECORD_ITRACE_START: 1284 return tool->itrace_start(tool, event, sample, machine); 1285 case PERF_RECORD_SWITCH: 1286 case PERF_RECORD_SWITCH_CPU_WIDE: 1287 return tool->context_switch(tool, event, sample, machine); 1288 default: 1289 ++evlist->stats.nr_unknown_events; 1290 return -1; 1291 } 1292 } 1293 1294 static int perf_session__deliver_event(struct perf_session *session, 1295 union perf_event *event, 1296 struct perf_sample *sample, 1297 struct perf_tool *tool, 1298 u64 file_offset) 1299 { 1300 int ret; 1301 1302 ret = auxtrace__process_event(session, event, sample, tool); 1303 if (ret < 0) 1304 return ret; 1305 if (ret > 0) 1306 return 0; 1307 1308 return machines__deliver_event(&session->machines, session->evlist, 1309 event, sample, tool, file_offset); 1310 } 1311 1312 static s64 perf_session__process_user_event(struct perf_session *session, 1313 union perf_event *event, 1314 u64 file_offset) 1315 { 1316 struct ordered_events *oe = &session->ordered_events; 1317 struct perf_tool *tool = session->tool; 1318 int fd = perf_data_file__fd(session->file); 1319 int err; 1320 1321 dump_event(session->evlist, event, file_offset, NULL); 1322 1323 /* These events are processed right away */ 1324 switch (event->header.type) { 1325 case PERF_RECORD_HEADER_ATTR: 1326 err = tool->attr(tool, event, &session->evlist); 1327 if (err == 0) { 1328 perf_session__set_id_hdr_size(session); 1329 perf_session__set_comm_exec(session); 1330 } 1331 return err; 1332 case PERF_RECORD_EVENT_UPDATE: 1333 return tool->event_update(tool, event, &session->evlist); 1334 case PERF_RECORD_HEADER_EVENT_TYPE: 1335 /* 1336 * Depreceated, but we need to handle it for sake 1337 * of old data files create in pipe mode. 1338 */ 1339 return 0; 1340 case PERF_RECORD_HEADER_TRACING_DATA: 1341 /* setup for reading amidst mmap */ 1342 lseek(fd, file_offset, SEEK_SET); 1343 return tool->tracing_data(tool, event, session); 1344 case PERF_RECORD_HEADER_BUILD_ID: 1345 return tool->build_id(tool, event, session); 1346 case PERF_RECORD_FINISHED_ROUND: 1347 return tool->finished_round(tool, event, oe); 1348 case PERF_RECORD_ID_INDEX: 1349 return tool->id_index(tool, event, session); 1350 case PERF_RECORD_AUXTRACE_INFO: 1351 return tool->auxtrace_info(tool, event, session); 1352 case PERF_RECORD_AUXTRACE: 1353 /* setup for reading amidst mmap */ 1354 lseek(fd, file_offset + event->header.size, SEEK_SET); 1355 return tool->auxtrace(tool, event, session); 1356 case PERF_RECORD_AUXTRACE_ERROR: 1357 perf_session__auxtrace_error_inc(session, event); 1358 return tool->auxtrace_error(tool, event, session); 1359 case PERF_RECORD_THREAD_MAP: 1360 return tool->thread_map(tool, event, session); 1361 case PERF_RECORD_CPU_MAP: 1362 return tool->cpu_map(tool, event, session); 1363 case PERF_RECORD_STAT_CONFIG: 1364 return tool->stat_config(tool, event, session); 1365 case PERF_RECORD_STAT: 1366 return tool->stat(tool, event, session); 1367 case PERF_RECORD_STAT_ROUND: 1368 return tool->stat_round(tool, event, session); 1369 case PERF_RECORD_TIME_CONV: 1370 session->time_conv = event->time_conv; 1371 return tool->time_conv(tool, event, session); 1372 default: 1373 return -EINVAL; 1374 } 1375 } 1376 1377 int perf_session__deliver_synth_event(struct perf_session *session, 1378 union perf_event *event, 1379 struct perf_sample *sample) 1380 { 1381 struct perf_evlist *evlist = session->evlist; 1382 struct perf_tool *tool = session->tool; 1383 1384 events_stats__inc(&evlist->stats, event->header.type); 1385 1386 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1387 return perf_session__process_user_event(session, event, 0); 1388 1389 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0); 1390 } 1391 1392 static void event_swap(union perf_event *event, bool sample_id_all) 1393 { 1394 perf_event__swap_op swap; 1395 1396 swap = perf_event__swap_ops[event->header.type]; 1397 if (swap) 1398 swap(event, sample_id_all); 1399 } 1400 1401 int perf_session__peek_event(struct perf_session *session, off_t file_offset, 1402 void *buf, size_t buf_sz, 1403 union perf_event **event_ptr, 1404 struct perf_sample *sample) 1405 { 1406 union perf_event *event; 1407 size_t hdr_sz, rest; 1408 int fd; 1409 1410 if (session->one_mmap && !session->header.needs_swap) { 1411 event = file_offset - session->one_mmap_offset + 1412 session->one_mmap_addr; 1413 goto out_parse_sample; 1414 } 1415 1416 if (perf_data_file__is_pipe(session->file)) 1417 return -1; 1418 1419 fd = perf_data_file__fd(session->file); 1420 hdr_sz = sizeof(struct perf_event_header); 1421 1422 if (buf_sz < hdr_sz) 1423 return -1; 1424 1425 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 || 1426 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz) 1427 return -1; 1428 1429 event = (union perf_event *)buf; 1430 1431 if (session->header.needs_swap) 1432 perf_event_header__bswap(&event->header); 1433 1434 if (event->header.size < hdr_sz || event->header.size > buf_sz) 1435 return -1; 1436 1437 rest = event->header.size - hdr_sz; 1438 1439 if (readn(fd, buf, rest) != (ssize_t)rest) 1440 return -1; 1441 1442 if (session->header.needs_swap) 1443 event_swap(event, perf_evlist__sample_id_all(session->evlist)); 1444 1445 out_parse_sample: 1446 1447 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START && 1448 perf_evlist__parse_sample(session->evlist, event, sample)) 1449 return -1; 1450 1451 *event_ptr = event; 1452 1453 return 0; 1454 } 1455 1456 static s64 perf_session__process_event(struct perf_session *session, 1457 union perf_event *event, u64 file_offset) 1458 { 1459 struct perf_evlist *evlist = session->evlist; 1460 struct perf_tool *tool = session->tool; 1461 struct perf_sample sample; 1462 int ret; 1463 1464 if (session->header.needs_swap) 1465 event_swap(event, perf_evlist__sample_id_all(evlist)); 1466 1467 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1468 return -EINVAL; 1469 1470 events_stats__inc(&evlist->stats, event->header.type); 1471 1472 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1473 return perf_session__process_user_event(session, event, file_offset); 1474 1475 /* 1476 * For all kernel events we get the sample data 1477 */ 1478 ret = perf_evlist__parse_sample(evlist, event, &sample); 1479 if (ret) 1480 return ret; 1481 1482 if (tool->ordered_events) { 1483 ret = perf_session__queue_event(session, event, &sample, file_offset); 1484 if (ret != -ETIME) 1485 return ret; 1486 } 1487 1488 return perf_session__deliver_event(session, event, &sample, tool, 1489 file_offset); 1490 } 1491 1492 void perf_event_header__bswap(struct perf_event_header *hdr) 1493 { 1494 hdr->type = bswap_32(hdr->type); 1495 hdr->misc = bswap_16(hdr->misc); 1496 hdr->size = bswap_16(hdr->size); 1497 } 1498 1499 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1500 { 1501 return machine__findnew_thread(&session->machines.host, -1, pid); 1502 } 1503 1504 int perf_session__register_idle_thread(struct perf_session *session) 1505 { 1506 struct thread *thread; 1507 int err = 0; 1508 1509 thread = machine__findnew_thread(&session->machines.host, 0, 0); 1510 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) { 1511 pr_err("problem inserting idle task.\n"); 1512 err = -1; 1513 } 1514 1515 if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) { 1516 pr_err("problem inserting idle task.\n"); 1517 err = -1; 1518 } 1519 1520 /* machine__findnew_thread() got the thread, so put it */ 1521 thread__put(thread); 1522 return err; 1523 } 1524 1525 static void 1526 perf_session__warn_order(const struct perf_session *session) 1527 { 1528 const struct ordered_events *oe = &session->ordered_events; 1529 struct perf_evsel *evsel; 1530 bool should_warn = true; 1531 1532 evlist__for_each_entry(session->evlist, evsel) { 1533 if (evsel->attr.write_backward) 1534 should_warn = false; 1535 } 1536 1537 if (!should_warn) 1538 return; 1539 if (oe->nr_unordered_events != 0) 1540 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events); 1541 } 1542 1543 static void perf_session__warn_about_errors(const struct perf_session *session) 1544 { 1545 const struct events_stats *stats = &session->evlist->stats; 1546 1547 if (session->tool->lost == perf_event__process_lost && 1548 stats->nr_events[PERF_RECORD_LOST] != 0) { 1549 ui__warning("Processed %d events and lost %d chunks!\n\n" 1550 "Check IO/CPU overload!\n\n", 1551 stats->nr_events[0], 1552 stats->nr_events[PERF_RECORD_LOST]); 1553 } 1554 1555 if (session->tool->lost_samples == perf_event__process_lost_samples) { 1556 double drop_rate; 1557 1558 drop_rate = (double)stats->total_lost_samples / 1559 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples); 1560 if (drop_rate > 0.05) { 1561 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%% samples!\n\n", 1562 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples, 1563 drop_rate * 100.0); 1564 } 1565 } 1566 1567 if (session->tool->aux == perf_event__process_aux && 1568 stats->total_aux_lost != 0) { 1569 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n", 1570 stats->total_aux_lost, 1571 stats->nr_events[PERF_RECORD_AUX]); 1572 } 1573 1574 if (session->tool->aux == perf_event__process_aux && 1575 stats->total_aux_partial != 0) { 1576 bool vmm_exclusive = false; 1577 1578 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive", 1579 &vmm_exclusive); 1580 1581 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n" 1582 "Are you running a KVM guest in the background?%s\n\n", 1583 stats->total_aux_partial, 1584 stats->nr_events[PERF_RECORD_AUX], 1585 vmm_exclusive ? 1586 "\nReloading kvm_intel module with vmm_exclusive=0\n" 1587 "will reduce the gaps to only guest's timeslices." : 1588 ""); 1589 } 1590 1591 if (stats->nr_unknown_events != 0) { 1592 ui__warning("Found %u unknown events!\n\n" 1593 "Is this an older tool processing a perf.data " 1594 "file generated by a more recent tool?\n\n" 1595 "If that is not the case, consider " 1596 "reporting to linux-kernel@vger.kernel.org.\n\n", 1597 stats->nr_unknown_events); 1598 } 1599 1600 if (stats->nr_unknown_id != 0) { 1601 ui__warning("%u samples with id not present in the header\n", 1602 stats->nr_unknown_id); 1603 } 1604 1605 if (stats->nr_invalid_chains != 0) { 1606 ui__warning("Found invalid callchains!\n\n" 1607 "%u out of %u events were discarded for this reason.\n\n" 1608 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1609 stats->nr_invalid_chains, 1610 stats->nr_events[PERF_RECORD_SAMPLE]); 1611 } 1612 1613 if (stats->nr_unprocessable_samples != 0) { 1614 ui__warning("%u unprocessable samples recorded.\n" 1615 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1616 stats->nr_unprocessable_samples); 1617 } 1618 1619 perf_session__warn_order(session); 1620 1621 events_stats__auxtrace_error_warn(stats); 1622 1623 if (stats->nr_proc_map_timeout != 0) { 1624 ui__warning("%d map information files for pre-existing threads were\n" 1625 "not processed, if there are samples for addresses they\n" 1626 "will not be resolved, you may find out which are these\n" 1627 "threads by running with -v and redirecting the output\n" 1628 "to a file.\n" 1629 "The time limit to process proc map is too short?\n" 1630 "Increase it by --proc-map-timeout\n", 1631 stats->nr_proc_map_timeout); 1632 } 1633 } 1634 1635 static int perf_session__flush_thread_stack(struct thread *thread, 1636 void *p __maybe_unused) 1637 { 1638 return thread_stack__flush(thread); 1639 } 1640 1641 static int perf_session__flush_thread_stacks(struct perf_session *session) 1642 { 1643 return machines__for_each_thread(&session->machines, 1644 perf_session__flush_thread_stack, 1645 NULL); 1646 } 1647 1648 volatile int session_done; 1649 1650 static int __perf_session__process_pipe_events(struct perf_session *session) 1651 { 1652 struct ordered_events *oe = &session->ordered_events; 1653 struct perf_tool *tool = session->tool; 1654 int fd = perf_data_file__fd(session->file); 1655 union perf_event *event; 1656 uint32_t size, cur_size = 0; 1657 void *buf = NULL; 1658 s64 skip = 0; 1659 u64 head; 1660 ssize_t err; 1661 void *p; 1662 1663 perf_tool__fill_defaults(tool); 1664 1665 head = 0; 1666 cur_size = sizeof(union perf_event); 1667 1668 buf = malloc(cur_size); 1669 if (!buf) 1670 return -errno; 1671 ordered_events__set_copy_on_queue(oe, true); 1672 more: 1673 event = buf; 1674 err = readn(fd, event, sizeof(struct perf_event_header)); 1675 if (err <= 0) { 1676 if (err == 0) 1677 goto done; 1678 1679 pr_err("failed to read event header\n"); 1680 goto out_err; 1681 } 1682 1683 if (session->header.needs_swap) 1684 perf_event_header__bswap(&event->header); 1685 1686 size = event->header.size; 1687 if (size < sizeof(struct perf_event_header)) { 1688 pr_err("bad event header size\n"); 1689 goto out_err; 1690 } 1691 1692 if (size > cur_size) { 1693 void *new = realloc(buf, size); 1694 if (!new) { 1695 pr_err("failed to allocate memory to read event\n"); 1696 goto out_err; 1697 } 1698 buf = new; 1699 cur_size = size; 1700 event = buf; 1701 } 1702 p = event; 1703 p += sizeof(struct perf_event_header); 1704 1705 if (size - sizeof(struct perf_event_header)) { 1706 err = readn(fd, p, size - sizeof(struct perf_event_header)); 1707 if (err <= 0) { 1708 if (err == 0) { 1709 pr_err("unexpected end of event stream\n"); 1710 goto done; 1711 } 1712 1713 pr_err("failed to read event data\n"); 1714 goto out_err; 1715 } 1716 } 1717 1718 if ((skip = perf_session__process_event(session, event, head)) < 0) { 1719 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1720 head, event->header.size, event->header.type); 1721 err = -EINVAL; 1722 goto out_err; 1723 } 1724 1725 head += size; 1726 1727 if (skip > 0) 1728 head += skip; 1729 1730 if (!session_done()) 1731 goto more; 1732 done: 1733 /* do the final flush for ordered samples */ 1734 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 1735 if (err) 1736 goto out_err; 1737 err = auxtrace__flush_events(session, tool); 1738 if (err) 1739 goto out_err; 1740 err = perf_session__flush_thread_stacks(session); 1741 out_err: 1742 free(buf); 1743 perf_session__warn_about_errors(session); 1744 ordered_events__free(&session->ordered_events); 1745 auxtrace__free_events(session); 1746 return err; 1747 } 1748 1749 static union perf_event * 1750 fetch_mmaped_event(struct perf_session *session, 1751 u64 head, size_t mmap_size, char *buf) 1752 { 1753 union perf_event *event; 1754 1755 /* 1756 * Ensure we have enough space remaining to read 1757 * the size of the event in the headers. 1758 */ 1759 if (head + sizeof(event->header) > mmap_size) 1760 return NULL; 1761 1762 event = (union perf_event *)(buf + head); 1763 1764 if (session->header.needs_swap) 1765 perf_event_header__bswap(&event->header); 1766 1767 if (head + event->header.size > mmap_size) { 1768 /* We're not fetching the event so swap back again */ 1769 if (session->header.needs_swap) 1770 perf_event_header__bswap(&event->header); 1771 return NULL; 1772 } 1773 1774 return event; 1775 } 1776 1777 /* 1778 * On 64bit we can mmap the data file in one go. No need for tiny mmap 1779 * slices. On 32bit we use 32MB. 1780 */ 1781 #if BITS_PER_LONG == 64 1782 #define MMAP_SIZE ULLONG_MAX 1783 #define NUM_MMAPS 1 1784 #else 1785 #define MMAP_SIZE (32 * 1024 * 1024ULL) 1786 #define NUM_MMAPS 128 1787 #endif 1788 1789 static int __perf_session__process_events(struct perf_session *session, 1790 u64 data_offset, u64 data_size, 1791 u64 file_size) 1792 { 1793 struct ordered_events *oe = &session->ordered_events; 1794 struct perf_tool *tool = session->tool; 1795 int fd = perf_data_file__fd(session->file); 1796 u64 head, page_offset, file_offset, file_pos, size; 1797 int err, mmap_prot, mmap_flags, map_idx = 0; 1798 size_t mmap_size; 1799 char *buf, *mmaps[NUM_MMAPS]; 1800 union perf_event *event; 1801 struct ui_progress prog; 1802 s64 skip; 1803 1804 perf_tool__fill_defaults(tool); 1805 1806 page_offset = page_size * (data_offset / page_size); 1807 file_offset = page_offset; 1808 head = data_offset - page_offset; 1809 1810 if (data_size == 0) 1811 goto out; 1812 1813 if (data_offset + data_size < file_size) 1814 file_size = data_offset + data_size; 1815 1816 ui_progress__init(&prog, file_size, "Processing events..."); 1817 1818 mmap_size = MMAP_SIZE; 1819 if (mmap_size > file_size) { 1820 mmap_size = file_size; 1821 session->one_mmap = true; 1822 } 1823 1824 memset(mmaps, 0, sizeof(mmaps)); 1825 1826 mmap_prot = PROT_READ; 1827 mmap_flags = MAP_SHARED; 1828 1829 if (session->header.needs_swap) { 1830 mmap_prot |= PROT_WRITE; 1831 mmap_flags = MAP_PRIVATE; 1832 } 1833 remap: 1834 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd, 1835 file_offset); 1836 if (buf == MAP_FAILED) { 1837 pr_err("failed to mmap file\n"); 1838 err = -errno; 1839 goto out_err; 1840 } 1841 mmaps[map_idx] = buf; 1842 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 1843 file_pos = file_offset + head; 1844 if (session->one_mmap) { 1845 session->one_mmap_addr = buf; 1846 session->one_mmap_offset = file_offset; 1847 } 1848 1849 more: 1850 event = fetch_mmaped_event(session, head, mmap_size, buf); 1851 if (!event) { 1852 if (mmaps[map_idx]) { 1853 munmap(mmaps[map_idx], mmap_size); 1854 mmaps[map_idx] = NULL; 1855 } 1856 1857 page_offset = page_size * (head / page_size); 1858 file_offset += page_offset; 1859 head -= page_offset; 1860 goto remap; 1861 } 1862 1863 size = event->header.size; 1864 1865 if (size < sizeof(struct perf_event_header) || 1866 (skip = perf_session__process_event(session, event, file_pos)) < 0) { 1867 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1868 file_offset + head, event->header.size, 1869 event->header.type); 1870 err = -EINVAL; 1871 goto out_err; 1872 } 1873 1874 if (skip) 1875 size += skip; 1876 1877 head += size; 1878 file_pos += size; 1879 1880 ui_progress__update(&prog, size); 1881 1882 if (session_done()) 1883 goto out; 1884 1885 if (file_pos < file_size) 1886 goto more; 1887 1888 out: 1889 /* do the final flush for ordered samples */ 1890 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 1891 if (err) 1892 goto out_err; 1893 err = auxtrace__flush_events(session, tool); 1894 if (err) 1895 goto out_err; 1896 err = perf_session__flush_thread_stacks(session); 1897 out_err: 1898 ui_progress__finish(); 1899 perf_session__warn_about_errors(session); 1900 /* 1901 * We may switching perf.data output, make ordered_events 1902 * reusable. 1903 */ 1904 ordered_events__reinit(&session->ordered_events); 1905 auxtrace__free_events(session); 1906 session->one_mmap = false; 1907 return err; 1908 } 1909 1910 int perf_session__process_events(struct perf_session *session) 1911 { 1912 u64 size = perf_data_file__size(session->file); 1913 int err; 1914 1915 if (perf_session__register_idle_thread(session) < 0) 1916 return -ENOMEM; 1917 1918 if (!perf_data_file__is_pipe(session->file)) 1919 err = __perf_session__process_events(session, 1920 session->header.data_offset, 1921 session->header.data_size, size); 1922 else 1923 err = __perf_session__process_pipe_events(session); 1924 1925 return err; 1926 } 1927 1928 bool perf_session__has_traces(struct perf_session *session, const char *msg) 1929 { 1930 struct perf_evsel *evsel; 1931 1932 evlist__for_each_entry(session->evlist, evsel) { 1933 if (evsel->attr.type == PERF_TYPE_TRACEPOINT) 1934 return true; 1935 } 1936 1937 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 1938 return false; 1939 } 1940 1941 int maps__set_kallsyms_ref_reloc_sym(struct map **maps, 1942 const char *symbol_name, u64 addr) 1943 { 1944 char *bracket; 1945 int i; 1946 struct ref_reloc_sym *ref; 1947 1948 ref = zalloc(sizeof(struct ref_reloc_sym)); 1949 if (ref == NULL) 1950 return -ENOMEM; 1951 1952 ref->name = strdup(symbol_name); 1953 if (ref->name == NULL) { 1954 free(ref); 1955 return -ENOMEM; 1956 } 1957 1958 bracket = strchr(ref->name, ']'); 1959 if (bracket) 1960 *bracket = '\0'; 1961 1962 ref->addr = addr; 1963 1964 for (i = 0; i < MAP__NR_TYPES; ++i) { 1965 struct kmap *kmap = map__kmap(maps[i]); 1966 1967 if (!kmap) 1968 continue; 1969 kmap->ref_reloc_sym = ref; 1970 } 1971 1972 return 0; 1973 } 1974 1975 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp) 1976 { 1977 return machines__fprintf_dsos(&session->machines, fp); 1978 } 1979 1980 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp, 1981 bool (skip)(struct dso *dso, int parm), int parm) 1982 { 1983 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm); 1984 } 1985 1986 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 1987 { 1988 size_t ret; 1989 const char *msg = ""; 1990 1991 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE)) 1992 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)"; 1993 1994 ret = fprintf(fp, "\nAggregated stats:%s\n", msg); 1995 1996 ret += events_stats__fprintf(&session->evlist->stats, fp); 1997 return ret; 1998 } 1999 2000 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 2001 { 2002 /* 2003 * FIXME: Here we have to actually print all the machines in this 2004 * session, not just the host... 2005 */ 2006 return machine__fprintf(&session->machines.host, fp); 2007 } 2008 2009 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, 2010 unsigned int type) 2011 { 2012 struct perf_evsel *pos; 2013 2014 evlist__for_each_entry(session->evlist, pos) { 2015 if (pos->attr.type == type) 2016 return pos; 2017 } 2018 return NULL; 2019 } 2020 2021 int perf_session__cpu_bitmap(struct perf_session *session, 2022 const char *cpu_list, unsigned long *cpu_bitmap) 2023 { 2024 int i, err = -1; 2025 struct cpu_map *map; 2026 2027 for (i = 0; i < PERF_TYPE_MAX; ++i) { 2028 struct perf_evsel *evsel; 2029 2030 evsel = perf_session__find_first_evtype(session, i); 2031 if (!evsel) 2032 continue; 2033 2034 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) { 2035 pr_err("File does not contain CPU events. " 2036 "Remove -c option to proceed.\n"); 2037 return -1; 2038 } 2039 } 2040 2041 map = cpu_map__new(cpu_list); 2042 if (map == NULL) { 2043 pr_err("Invalid cpu_list\n"); 2044 return -1; 2045 } 2046 2047 for (i = 0; i < map->nr; i++) { 2048 int cpu = map->map[i]; 2049 2050 if (cpu >= MAX_NR_CPUS) { 2051 pr_err("Requested CPU %d too large. " 2052 "Consider raising MAX_NR_CPUS\n", cpu); 2053 goto out_delete_map; 2054 } 2055 2056 set_bit(cpu, cpu_bitmap); 2057 } 2058 2059 err = 0; 2060 2061 out_delete_map: 2062 cpu_map__put(map); 2063 return err; 2064 } 2065 2066 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 2067 bool full) 2068 { 2069 if (session == NULL || fp == NULL) 2070 return; 2071 2072 fprintf(fp, "# ========\n"); 2073 perf_header__fprintf_info(session, fp, full); 2074 fprintf(fp, "# ========\n#\n"); 2075 } 2076 2077 2078 int __perf_session__set_tracepoints_handlers(struct perf_session *session, 2079 const struct perf_evsel_str_handler *assocs, 2080 size_t nr_assocs) 2081 { 2082 struct perf_evsel *evsel; 2083 size_t i; 2084 int err; 2085 2086 for (i = 0; i < nr_assocs; i++) { 2087 /* 2088 * Adding a handler for an event not in the session, 2089 * just ignore it. 2090 */ 2091 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name); 2092 if (evsel == NULL) 2093 continue; 2094 2095 err = -EEXIST; 2096 if (evsel->handler != NULL) 2097 goto out; 2098 evsel->handler = assocs[i].handler; 2099 } 2100 2101 err = 0; 2102 out: 2103 return err; 2104 } 2105 2106 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused, 2107 union perf_event *event, 2108 struct perf_session *session) 2109 { 2110 struct perf_evlist *evlist = session->evlist; 2111 struct id_index_event *ie = &event->id_index; 2112 size_t i, nr, max_nr; 2113 2114 max_nr = (ie->header.size - sizeof(struct id_index_event)) / 2115 sizeof(struct id_index_entry); 2116 nr = ie->nr; 2117 if (nr > max_nr) 2118 return -EINVAL; 2119 2120 if (dump_trace) 2121 fprintf(stdout, " nr: %zu\n", nr); 2122 2123 for (i = 0; i < nr; i++) { 2124 struct id_index_entry *e = &ie->entries[i]; 2125 struct perf_sample_id *sid; 2126 2127 if (dump_trace) { 2128 fprintf(stdout, " ... id: %"PRIu64, e->id); 2129 fprintf(stdout, " idx: %"PRIu64, e->idx); 2130 fprintf(stdout, " cpu: %"PRId64, e->cpu); 2131 fprintf(stdout, " tid: %"PRId64"\n", e->tid); 2132 } 2133 2134 sid = perf_evlist__id2sid(evlist, e->id); 2135 if (!sid) 2136 return -ENOENT; 2137 sid->idx = e->idx; 2138 sid->cpu = e->cpu; 2139 sid->tid = e->tid; 2140 } 2141 return 0; 2142 } 2143 2144 int perf_event__synthesize_id_index(struct perf_tool *tool, 2145 perf_event__handler_t process, 2146 struct perf_evlist *evlist, 2147 struct machine *machine) 2148 { 2149 union perf_event *ev; 2150 struct perf_evsel *evsel; 2151 size_t nr = 0, i = 0, sz, max_nr, n; 2152 int err; 2153 2154 pr_debug2("Synthesizing id index\n"); 2155 2156 max_nr = (UINT16_MAX - sizeof(struct id_index_event)) / 2157 sizeof(struct id_index_entry); 2158 2159 evlist__for_each_entry(evlist, evsel) 2160 nr += evsel->ids; 2161 2162 n = nr > max_nr ? max_nr : nr; 2163 sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry); 2164 ev = zalloc(sz); 2165 if (!ev) 2166 return -ENOMEM; 2167 2168 ev->id_index.header.type = PERF_RECORD_ID_INDEX; 2169 ev->id_index.header.size = sz; 2170 ev->id_index.nr = n; 2171 2172 evlist__for_each_entry(evlist, evsel) { 2173 u32 j; 2174 2175 for (j = 0; j < evsel->ids; j++) { 2176 struct id_index_entry *e; 2177 struct perf_sample_id *sid; 2178 2179 if (i >= n) { 2180 err = process(tool, ev, NULL, machine); 2181 if (err) 2182 goto out_err; 2183 nr -= n; 2184 i = 0; 2185 } 2186 2187 e = &ev->id_index.entries[i++]; 2188 2189 e->id = evsel->id[j]; 2190 2191 sid = perf_evlist__id2sid(evlist, e->id); 2192 if (!sid) { 2193 free(ev); 2194 return -ENOENT; 2195 } 2196 2197 e->idx = sid->idx; 2198 e->cpu = sid->cpu; 2199 e->tid = sid->tid; 2200 } 2201 } 2202 2203 sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry); 2204 ev->id_index.header.size = sz; 2205 ev->id_index.nr = nr; 2206 2207 err = process(tool, ev, NULL, machine); 2208 out_err: 2209 free(ev); 2210 2211 return err; 2212 } 2213