1 #include <errno.h> 2 #include <inttypes.h> 3 #include <linux/kernel.h> 4 #include <traceevent/event-parse.h> 5 #include <api/fs/fs.h> 6 7 #include <byteswap.h> 8 #include <unistd.h> 9 #include <sys/types.h> 10 #include <sys/mman.h> 11 12 #include "evlist.h" 13 #include "evsel.h" 14 #include "memswap.h" 15 #include "session.h" 16 #include "tool.h" 17 #include "sort.h" 18 #include "util.h" 19 #include "cpumap.h" 20 #include "perf_regs.h" 21 #include "asm/bug.h" 22 #include "auxtrace.h" 23 #include "thread.h" 24 #include "thread-stack.h" 25 #include "stat.h" 26 27 static int perf_session__deliver_event(struct perf_session *session, 28 union perf_event *event, 29 struct perf_sample *sample, 30 struct perf_tool *tool, 31 u64 file_offset); 32 33 static int perf_session__open(struct perf_session *session) 34 { 35 struct perf_data_file *file = session->file; 36 37 if (perf_session__read_header(session) < 0) { 38 pr_err("incompatible file format (rerun with -v to learn more)\n"); 39 return -1; 40 } 41 42 if (perf_data_file__is_pipe(file)) 43 return 0; 44 45 if (perf_header__has_feat(&session->header, HEADER_STAT)) 46 return 0; 47 48 if (!perf_evlist__valid_sample_type(session->evlist)) { 49 pr_err("non matching sample_type\n"); 50 return -1; 51 } 52 53 if (!perf_evlist__valid_sample_id_all(session->evlist)) { 54 pr_err("non matching sample_id_all\n"); 55 return -1; 56 } 57 58 if (!perf_evlist__valid_read_format(session->evlist)) { 59 pr_err("non matching read_format\n"); 60 return -1; 61 } 62 63 return 0; 64 } 65 66 void perf_session__set_id_hdr_size(struct perf_session *session) 67 { 68 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist); 69 70 machines__set_id_hdr_size(&session->machines, id_hdr_size); 71 } 72 73 int perf_session__create_kernel_maps(struct perf_session *session) 74 { 75 int ret = machine__create_kernel_maps(&session->machines.host); 76 77 if (ret >= 0) 78 ret = machines__create_guest_kernel_maps(&session->machines); 79 return ret; 80 } 81 82 static void perf_session__destroy_kernel_maps(struct perf_session *session) 83 { 84 machines__destroy_kernel_maps(&session->machines); 85 } 86 87 static bool perf_session__has_comm_exec(struct perf_session *session) 88 { 89 struct perf_evsel *evsel; 90 91 evlist__for_each_entry(session->evlist, evsel) { 92 if (evsel->attr.comm_exec) 93 return true; 94 } 95 96 return false; 97 } 98 99 static void perf_session__set_comm_exec(struct perf_session *session) 100 { 101 bool comm_exec = perf_session__has_comm_exec(session); 102 103 machines__set_comm_exec(&session->machines, comm_exec); 104 } 105 106 static int ordered_events__deliver_event(struct ordered_events *oe, 107 struct ordered_event *event) 108 { 109 struct perf_sample sample; 110 struct perf_session *session = container_of(oe, struct perf_session, 111 ordered_events); 112 int ret = perf_evlist__parse_sample(session->evlist, event->event, &sample); 113 114 if (ret) { 115 pr_err("Can't parse sample, err = %d\n", ret); 116 return ret; 117 } 118 119 return perf_session__deliver_event(session, event->event, &sample, 120 session->tool, event->file_offset); 121 } 122 123 struct perf_session *perf_session__new(struct perf_data_file *file, 124 bool repipe, struct perf_tool *tool) 125 { 126 struct perf_session *session = zalloc(sizeof(*session)); 127 128 if (!session) 129 goto out; 130 131 session->repipe = repipe; 132 session->tool = tool; 133 INIT_LIST_HEAD(&session->auxtrace_index); 134 machines__init(&session->machines); 135 ordered_events__init(&session->ordered_events, ordered_events__deliver_event); 136 137 if (file) { 138 if (perf_data_file__open(file)) 139 goto out_delete; 140 141 session->file = file; 142 143 if (perf_data_file__is_read(file)) { 144 if (perf_session__open(session) < 0) 145 goto out_close; 146 147 /* 148 * set session attributes that are present in perf.data 149 * but not in pipe-mode. 150 */ 151 if (!file->is_pipe) { 152 perf_session__set_id_hdr_size(session); 153 perf_session__set_comm_exec(session); 154 } 155 } 156 } else { 157 session->machines.host.env = &perf_env; 158 } 159 160 if (!file || perf_data_file__is_write(file)) { 161 /* 162 * In O_RDONLY mode this will be performed when reading the 163 * kernel MMAP event, in perf_event__process_mmap(). 164 */ 165 if (perf_session__create_kernel_maps(session) < 0) 166 pr_warning("Cannot read kernel map\n"); 167 } 168 169 /* 170 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is 171 * processed, so perf_evlist__sample_id_all is not meaningful here. 172 */ 173 if ((!file || !file->is_pipe) && tool && tool->ordering_requires_timestamps && 174 tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) { 175 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); 176 tool->ordered_events = false; 177 } 178 179 return session; 180 181 out_close: 182 perf_data_file__close(file); 183 out_delete: 184 perf_session__delete(session); 185 out: 186 return NULL; 187 } 188 189 static void perf_session__delete_threads(struct perf_session *session) 190 { 191 machine__delete_threads(&session->machines.host); 192 } 193 194 void perf_session__delete(struct perf_session *session) 195 { 196 if (session == NULL) 197 return; 198 auxtrace__free(session); 199 auxtrace_index__free(&session->auxtrace_index); 200 perf_session__destroy_kernel_maps(session); 201 perf_session__delete_threads(session); 202 perf_env__exit(&session->header.env); 203 machines__exit(&session->machines); 204 if (session->file) 205 perf_data_file__close(session->file); 206 free(session); 207 } 208 209 static int process_event_synth_tracing_data_stub(struct perf_tool *tool 210 __maybe_unused, 211 union perf_event *event 212 __maybe_unused, 213 struct perf_session *session 214 __maybe_unused) 215 { 216 dump_printf(": unhandled!\n"); 217 return 0; 218 } 219 220 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused, 221 union perf_event *event __maybe_unused, 222 struct perf_evlist **pevlist 223 __maybe_unused) 224 { 225 dump_printf(": unhandled!\n"); 226 return 0; 227 } 228 229 static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused, 230 union perf_event *event __maybe_unused, 231 struct perf_evlist **pevlist 232 __maybe_unused) 233 { 234 if (dump_trace) 235 perf_event__fprintf_event_update(event, stdout); 236 237 dump_printf(": unhandled!\n"); 238 return 0; 239 } 240 241 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused, 242 union perf_event *event __maybe_unused, 243 struct perf_sample *sample __maybe_unused, 244 struct perf_evsel *evsel __maybe_unused, 245 struct machine *machine __maybe_unused) 246 { 247 dump_printf(": unhandled!\n"); 248 return 0; 249 } 250 251 static int process_event_stub(struct perf_tool *tool __maybe_unused, 252 union perf_event *event __maybe_unused, 253 struct perf_sample *sample __maybe_unused, 254 struct machine *machine __maybe_unused) 255 { 256 dump_printf(": unhandled!\n"); 257 return 0; 258 } 259 260 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused, 261 union perf_event *event __maybe_unused, 262 struct ordered_events *oe __maybe_unused) 263 { 264 dump_printf(": unhandled!\n"); 265 return 0; 266 } 267 268 static int process_finished_round(struct perf_tool *tool, 269 union perf_event *event, 270 struct ordered_events *oe); 271 272 static int skipn(int fd, off_t n) 273 { 274 char buf[4096]; 275 ssize_t ret; 276 277 while (n > 0) { 278 ret = read(fd, buf, min(n, (off_t)sizeof(buf))); 279 if (ret <= 0) 280 return ret; 281 n -= ret; 282 } 283 284 return 0; 285 } 286 287 static s64 process_event_auxtrace_stub(struct perf_tool *tool __maybe_unused, 288 union perf_event *event, 289 struct perf_session *session 290 __maybe_unused) 291 { 292 dump_printf(": unhandled!\n"); 293 if (perf_data_file__is_pipe(session->file)) 294 skipn(perf_data_file__fd(session->file), event->auxtrace.size); 295 return event->auxtrace.size; 296 } 297 298 static int process_event_op2_stub(struct perf_tool *tool __maybe_unused, 299 union perf_event *event __maybe_unused, 300 struct perf_session *session __maybe_unused) 301 { 302 dump_printf(": unhandled!\n"); 303 return 0; 304 } 305 306 307 static 308 int process_event_thread_map_stub(struct perf_tool *tool __maybe_unused, 309 union perf_event *event __maybe_unused, 310 struct perf_session *session __maybe_unused) 311 { 312 if (dump_trace) 313 perf_event__fprintf_thread_map(event, stdout); 314 315 dump_printf(": unhandled!\n"); 316 return 0; 317 } 318 319 static 320 int process_event_cpu_map_stub(struct perf_tool *tool __maybe_unused, 321 union perf_event *event __maybe_unused, 322 struct perf_session *session __maybe_unused) 323 { 324 if (dump_trace) 325 perf_event__fprintf_cpu_map(event, stdout); 326 327 dump_printf(": unhandled!\n"); 328 return 0; 329 } 330 331 static 332 int process_event_stat_config_stub(struct perf_tool *tool __maybe_unused, 333 union perf_event *event __maybe_unused, 334 struct perf_session *session __maybe_unused) 335 { 336 if (dump_trace) 337 perf_event__fprintf_stat_config(event, stdout); 338 339 dump_printf(": unhandled!\n"); 340 return 0; 341 } 342 343 static int process_stat_stub(struct perf_tool *tool __maybe_unused, 344 union perf_event *event __maybe_unused, 345 struct perf_session *perf_session 346 __maybe_unused) 347 { 348 if (dump_trace) 349 perf_event__fprintf_stat(event, stdout); 350 351 dump_printf(": unhandled!\n"); 352 return 0; 353 } 354 355 static int process_stat_round_stub(struct perf_tool *tool __maybe_unused, 356 union perf_event *event __maybe_unused, 357 struct perf_session *perf_session 358 __maybe_unused) 359 { 360 if (dump_trace) 361 perf_event__fprintf_stat_round(event, stdout); 362 363 dump_printf(": unhandled!\n"); 364 return 0; 365 } 366 367 void perf_tool__fill_defaults(struct perf_tool *tool) 368 { 369 if (tool->sample == NULL) 370 tool->sample = process_event_sample_stub; 371 if (tool->mmap == NULL) 372 tool->mmap = process_event_stub; 373 if (tool->mmap2 == NULL) 374 tool->mmap2 = process_event_stub; 375 if (tool->comm == NULL) 376 tool->comm = process_event_stub; 377 if (tool->fork == NULL) 378 tool->fork = process_event_stub; 379 if (tool->exit == NULL) 380 tool->exit = process_event_stub; 381 if (tool->lost == NULL) 382 tool->lost = perf_event__process_lost; 383 if (tool->lost_samples == NULL) 384 tool->lost_samples = perf_event__process_lost_samples; 385 if (tool->aux == NULL) 386 tool->aux = perf_event__process_aux; 387 if (tool->itrace_start == NULL) 388 tool->itrace_start = perf_event__process_itrace_start; 389 if (tool->context_switch == NULL) 390 tool->context_switch = perf_event__process_switch; 391 if (tool->read == NULL) 392 tool->read = process_event_sample_stub; 393 if (tool->throttle == NULL) 394 tool->throttle = process_event_stub; 395 if (tool->unthrottle == NULL) 396 tool->unthrottle = process_event_stub; 397 if (tool->attr == NULL) 398 tool->attr = process_event_synth_attr_stub; 399 if (tool->event_update == NULL) 400 tool->event_update = process_event_synth_event_update_stub; 401 if (tool->tracing_data == NULL) 402 tool->tracing_data = process_event_synth_tracing_data_stub; 403 if (tool->build_id == NULL) 404 tool->build_id = process_event_op2_stub; 405 if (tool->finished_round == NULL) { 406 if (tool->ordered_events) 407 tool->finished_round = process_finished_round; 408 else 409 tool->finished_round = process_finished_round_stub; 410 } 411 if (tool->id_index == NULL) 412 tool->id_index = process_event_op2_stub; 413 if (tool->auxtrace_info == NULL) 414 tool->auxtrace_info = process_event_op2_stub; 415 if (tool->auxtrace == NULL) 416 tool->auxtrace = process_event_auxtrace_stub; 417 if (tool->auxtrace_error == NULL) 418 tool->auxtrace_error = process_event_op2_stub; 419 if (tool->thread_map == NULL) 420 tool->thread_map = process_event_thread_map_stub; 421 if (tool->cpu_map == NULL) 422 tool->cpu_map = process_event_cpu_map_stub; 423 if (tool->stat_config == NULL) 424 tool->stat_config = process_event_stat_config_stub; 425 if (tool->stat == NULL) 426 tool->stat = process_stat_stub; 427 if (tool->stat_round == NULL) 428 tool->stat_round = process_stat_round_stub; 429 if (tool->time_conv == NULL) 430 tool->time_conv = process_event_op2_stub; 431 } 432 433 static void swap_sample_id_all(union perf_event *event, void *data) 434 { 435 void *end = (void *) event + event->header.size; 436 int size = end - data; 437 438 BUG_ON(size % sizeof(u64)); 439 mem_bswap_64(data, size); 440 } 441 442 static void perf_event__all64_swap(union perf_event *event, 443 bool sample_id_all __maybe_unused) 444 { 445 struct perf_event_header *hdr = &event->header; 446 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 447 } 448 449 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 450 { 451 event->comm.pid = bswap_32(event->comm.pid); 452 event->comm.tid = bswap_32(event->comm.tid); 453 454 if (sample_id_all) { 455 void *data = &event->comm.comm; 456 457 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 458 swap_sample_id_all(event, data); 459 } 460 } 461 462 static void perf_event__mmap_swap(union perf_event *event, 463 bool sample_id_all) 464 { 465 event->mmap.pid = bswap_32(event->mmap.pid); 466 event->mmap.tid = bswap_32(event->mmap.tid); 467 event->mmap.start = bswap_64(event->mmap.start); 468 event->mmap.len = bswap_64(event->mmap.len); 469 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 470 471 if (sample_id_all) { 472 void *data = &event->mmap.filename; 473 474 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 475 swap_sample_id_all(event, data); 476 } 477 } 478 479 static void perf_event__mmap2_swap(union perf_event *event, 480 bool sample_id_all) 481 { 482 event->mmap2.pid = bswap_32(event->mmap2.pid); 483 event->mmap2.tid = bswap_32(event->mmap2.tid); 484 event->mmap2.start = bswap_64(event->mmap2.start); 485 event->mmap2.len = bswap_64(event->mmap2.len); 486 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); 487 event->mmap2.maj = bswap_32(event->mmap2.maj); 488 event->mmap2.min = bswap_32(event->mmap2.min); 489 event->mmap2.ino = bswap_64(event->mmap2.ino); 490 491 if (sample_id_all) { 492 void *data = &event->mmap2.filename; 493 494 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 495 swap_sample_id_all(event, data); 496 } 497 } 498 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 499 { 500 event->fork.pid = bswap_32(event->fork.pid); 501 event->fork.tid = bswap_32(event->fork.tid); 502 event->fork.ppid = bswap_32(event->fork.ppid); 503 event->fork.ptid = bswap_32(event->fork.ptid); 504 event->fork.time = bswap_64(event->fork.time); 505 506 if (sample_id_all) 507 swap_sample_id_all(event, &event->fork + 1); 508 } 509 510 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 511 { 512 event->read.pid = bswap_32(event->read.pid); 513 event->read.tid = bswap_32(event->read.tid); 514 event->read.value = bswap_64(event->read.value); 515 event->read.time_enabled = bswap_64(event->read.time_enabled); 516 event->read.time_running = bswap_64(event->read.time_running); 517 event->read.id = bswap_64(event->read.id); 518 519 if (sample_id_all) 520 swap_sample_id_all(event, &event->read + 1); 521 } 522 523 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all) 524 { 525 event->aux.aux_offset = bswap_64(event->aux.aux_offset); 526 event->aux.aux_size = bswap_64(event->aux.aux_size); 527 event->aux.flags = bswap_64(event->aux.flags); 528 529 if (sample_id_all) 530 swap_sample_id_all(event, &event->aux + 1); 531 } 532 533 static void perf_event__itrace_start_swap(union perf_event *event, 534 bool sample_id_all) 535 { 536 event->itrace_start.pid = bswap_32(event->itrace_start.pid); 537 event->itrace_start.tid = bswap_32(event->itrace_start.tid); 538 539 if (sample_id_all) 540 swap_sample_id_all(event, &event->itrace_start + 1); 541 } 542 543 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all) 544 { 545 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) { 546 event->context_switch.next_prev_pid = 547 bswap_32(event->context_switch.next_prev_pid); 548 event->context_switch.next_prev_tid = 549 bswap_32(event->context_switch.next_prev_tid); 550 } 551 552 if (sample_id_all) 553 swap_sample_id_all(event, &event->context_switch + 1); 554 } 555 556 static void perf_event__throttle_swap(union perf_event *event, 557 bool sample_id_all) 558 { 559 event->throttle.time = bswap_64(event->throttle.time); 560 event->throttle.id = bswap_64(event->throttle.id); 561 event->throttle.stream_id = bswap_64(event->throttle.stream_id); 562 563 if (sample_id_all) 564 swap_sample_id_all(event, &event->throttle + 1); 565 } 566 567 static u8 revbyte(u8 b) 568 { 569 int rev = (b >> 4) | ((b & 0xf) << 4); 570 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 571 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 572 return (u8) rev; 573 } 574 575 /* 576 * XXX this is hack in attempt to carry flags bitfield 577 * through endian village. ABI says: 578 * 579 * Bit-fields are allocated from right to left (least to most significant) 580 * on little-endian implementations and from left to right (most to least 581 * significant) on big-endian implementations. 582 * 583 * The above seems to be byte specific, so we need to reverse each 584 * byte of the bitfield. 'Internet' also says this might be implementation 585 * specific and we probably need proper fix and carry perf_event_attr 586 * bitfield flags in separate data file FEAT_ section. Thought this seems 587 * to work for now. 588 */ 589 static void swap_bitfield(u8 *p, unsigned len) 590 { 591 unsigned i; 592 593 for (i = 0; i < len; i++) { 594 *p = revbyte(*p); 595 p++; 596 } 597 } 598 599 /* exported for swapping attributes in file header */ 600 void perf_event__attr_swap(struct perf_event_attr *attr) 601 { 602 attr->type = bswap_32(attr->type); 603 attr->size = bswap_32(attr->size); 604 605 #define bswap_safe(f, n) \ 606 (attr->size > (offsetof(struct perf_event_attr, f) + \ 607 sizeof(attr->f) * (n))) 608 #define bswap_field(f, sz) \ 609 do { \ 610 if (bswap_safe(f, 0)) \ 611 attr->f = bswap_##sz(attr->f); \ 612 } while(0) 613 #define bswap_field_16(f) bswap_field(f, 16) 614 #define bswap_field_32(f) bswap_field(f, 32) 615 #define bswap_field_64(f) bswap_field(f, 64) 616 617 bswap_field_64(config); 618 bswap_field_64(sample_period); 619 bswap_field_64(sample_type); 620 bswap_field_64(read_format); 621 bswap_field_32(wakeup_events); 622 bswap_field_32(bp_type); 623 bswap_field_64(bp_addr); 624 bswap_field_64(bp_len); 625 bswap_field_64(branch_sample_type); 626 bswap_field_64(sample_regs_user); 627 bswap_field_32(sample_stack_user); 628 bswap_field_32(aux_watermark); 629 bswap_field_16(sample_max_stack); 630 631 /* 632 * After read_format are bitfields. Check read_format because 633 * we are unable to use offsetof on bitfield. 634 */ 635 if (bswap_safe(read_format, 1)) 636 swap_bitfield((u8 *) (&attr->read_format + 1), 637 sizeof(u64)); 638 #undef bswap_field_64 639 #undef bswap_field_32 640 #undef bswap_field 641 #undef bswap_safe 642 } 643 644 static void perf_event__hdr_attr_swap(union perf_event *event, 645 bool sample_id_all __maybe_unused) 646 { 647 size_t size; 648 649 perf_event__attr_swap(&event->attr.attr); 650 651 size = event->header.size; 652 size -= (void *)&event->attr.id - (void *)event; 653 mem_bswap_64(event->attr.id, size); 654 } 655 656 static void perf_event__event_update_swap(union perf_event *event, 657 bool sample_id_all __maybe_unused) 658 { 659 event->event_update.type = bswap_64(event->event_update.type); 660 event->event_update.id = bswap_64(event->event_update.id); 661 } 662 663 static void perf_event__event_type_swap(union perf_event *event, 664 bool sample_id_all __maybe_unused) 665 { 666 event->event_type.event_type.event_id = 667 bswap_64(event->event_type.event_type.event_id); 668 } 669 670 static void perf_event__tracing_data_swap(union perf_event *event, 671 bool sample_id_all __maybe_unused) 672 { 673 event->tracing_data.size = bswap_32(event->tracing_data.size); 674 } 675 676 static void perf_event__auxtrace_info_swap(union perf_event *event, 677 bool sample_id_all __maybe_unused) 678 { 679 size_t size; 680 681 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type); 682 683 size = event->header.size; 684 size -= (void *)&event->auxtrace_info.priv - (void *)event; 685 mem_bswap_64(event->auxtrace_info.priv, size); 686 } 687 688 static void perf_event__auxtrace_swap(union perf_event *event, 689 bool sample_id_all __maybe_unused) 690 { 691 event->auxtrace.size = bswap_64(event->auxtrace.size); 692 event->auxtrace.offset = bswap_64(event->auxtrace.offset); 693 event->auxtrace.reference = bswap_64(event->auxtrace.reference); 694 event->auxtrace.idx = bswap_32(event->auxtrace.idx); 695 event->auxtrace.tid = bswap_32(event->auxtrace.tid); 696 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu); 697 } 698 699 static void perf_event__auxtrace_error_swap(union perf_event *event, 700 bool sample_id_all __maybe_unused) 701 { 702 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type); 703 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code); 704 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu); 705 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid); 706 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid); 707 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip); 708 } 709 710 static void perf_event__thread_map_swap(union perf_event *event, 711 bool sample_id_all __maybe_unused) 712 { 713 unsigned i; 714 715 event->thread_map.nr = bswap_64(event->thread_map.nr); 716 717 for (i = 0; i < event->thread_map.nr; i++) 718 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid); 719 } 720 721 static void perf_event__cpu_map_swap(union perf_event *event, 722 bool sample_id_all __maybe_unused) 723 { 724 struct cpu_map_data *data = &event->cpu_map.data; 725 struct cpu_map_entries *cpus; 726 struct cpu_map_mask *mask; 727 unsigned i; 728 729 data->type = bswap_64(data->type); 730 731 switch (data->type) { 732 case PERF_CPU_MAP__CPUS: 733 cpus = (struct cpu_map_entries *)data->data; 734 735 cpus->nr = bswap_16(cpus->nr); 736 737 for (i = 0; i < cpus->nr; i++) 738 cpus->cpu[i] = bswap_16(cpus->cpu[i]); 739 break; 740 case PERF_CPU_MAP__MASK: 741 mask = (struct cpu_map_mask *) data->data; 742 743 mask->nr = bswap_16(mask->nr); 744 mask->long_size = bswap_16(mask->long_size); 745 746 switch (mask->long_size) { 747 case 4: mem_bswap_32(&mask->mask, mask->nr); break; 748 case 8: mem_bswap_64(&mask->mask, mask->nr); break; 749 default: 750 pr_err("cpu_map swap: unsupported long size\n"); 751 } 752 default: 753 break; 754 } 755 } 756 757 static void perf_event__stat_config_swap(union perf_event *event, 758 bool sample_id_all __maybe_unused) 759 { 760 u64 size; 761 762 size = event->stat_config.nr * sizeof(event->stat_config.data[0]); 763 size += 1; /* nr item itself */ 764 mem_bswap_64(&event->stat_config.nr, size); 765 } 766 767 static void perf_event__stat_swap(union perf_event *event, 768 bool sample_id_all __maybe_unused) 769 { 770 event->stat.id = bswap_64(event->stat.id); 771 event->stat.thread = bswap_32(event->stat.thread); 772 event->stat.cpu = bswap_32(event->stat.cpu); 773 event->stat.val = bswap_64(event->stat.val); 774 event->stat.ena = bswap_64(event->stat.ena); 775 event->stat.run = bswap_64(event->stat.run); 776 } 777 778 static void perf_event__stat_round_swap(union perf_event *event, 779 bool sample_id_all __maybe_unused) 780 { 781 event->stat_round.type = bswap_64(event->stat_round.type); 782 event->stat_round.time = bswap_64(event->stat_round.time); 783 } 784 785 typedef void (*perf_event__swap_op)(union perf_event *event, 786 bool sample_id_all); 787 788 static perf_event__swap_op perf_event__swap_ops[] = { 789 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 790 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap, 791 [PERF_RECORD_COMM] = perf_event__comm_swap, 792 [PERF_RECORD_FORK] = perf_event__task_swap, 793 [PERF_RECORD_EXIT] = perf_event__task_swap, 794 [PERF_RECORD_LOST] = perf_event__all64_swap, 795 [PERF_RECORD_READ] = perf_event__read_swap, 796 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap, 797 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap, 798 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 799 [PERF_RECORD_AUX] = perf_event__aux_swap, 800 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap, 801 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap, 802 [PERF_RECORD_SWITCH] = perf_event__switch_swap, 803 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap, 804 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 805 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 806 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 807 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 808 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap, 809 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap, 810 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap, 811 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap, 812 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap, 813 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap, 814 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap, 815 [PERF_RECORD_STAT] = perf_event__stat_swap, 816 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap, 817 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap, 818 [PERF_RECORD_TIME_CONV] = perf_event__all64_swap, 819 [PERF_RECORD_HEADER_MAX] = NULL, 820 }; 821 822 /* 823 * When perf record finishes a pass on every buffers, it records this pseudo 824 * event. 825 * We record the max timestamp t found in the pass n. 826 * Assuming these timestamps are monotonic across cpus, we know that if 827 * a buffer still has events with timestamps below t, they will be all 828 * available and then read in the pass n + 1. 829 * Hence when we start to read the pass n + 2, we can safely flush every 830 * events with timestamps below t. 831 * 832 * ============ PASS n ================= 833 * CPU 0 | CPU 1 834 * | 835 * cnt1 timestamps | cnt2 timestamps 836 * 1 | 2 837 * 2 | 3 838 * - | 4 <--- max recorded 839 * 840 * ============ PASS n + 1 ============== 841 * CPU 0 | CPU 1 842 * | 843 * cnt1 timestamps | cnt2 timestamps 844 * 3 | 5 845 * 4 | 6 846 * 5 | 7 <---- max recorded 847 * 848 * Flush every events below timestamp 4 849 * 850 * ============ PASS n + 2 ============== 851 * CPU 0 | CPU 1 852 * | 853 * cnt1 timestamps | cnt2 timestamps 854 * 6 | 8 855 * 7 | 9 856 * - | 10 857 * 858 * Flush every events below timestamp 7 859 * etc... 860 */ 861 static int process_finished_round(struct perf_tool *tool __maybe_unused, 862 union perf_event *event __maybe_unused, 863 struct ordered_events *oe) 864 { 865 if (dump_trace) 866 fprintf(stdout, "\n"); 867 return ordered_events__flush(oe, OE_FLUSH__ROUND); 868 } 869 870 int perf_session__queue_event(struct perf_session *s, union perf_event *event, 871 struct perf_sample *sample, u64 file_offset) 872 { 873 return ordered_events__queue(&s->ordered_events, event, sample, file_offset); 874 } 875 876 static void callchain__lbr_callstack_printf(struct perf_sample *sample) 877 { 878 struct ip_callchain *callchain = sample->callchain; 879 struct branch_stack *lbr_stack = sample->branch_stack; 880 u64 kernel_callchain_nr = callchain->nr; 881 unsigned int i; 882 883 for (i = 0; i < kernel_callchain_nr; i++) { 884 if (callchain->ips[i] == PERF_CONTEXT_USER) 885 break; 886 } 887 888 if ((i != kernel_callchain_nr) && lbr_stack->nr) { 889 u64 total_nr; 890 /* 891 * LBR callstack can only get user call chain, 892 * i is kernel call chain number, 893 * 1 is PERF_CONTEXT_USER. 894 * 895 * The user call chain is stored in LBR registers. 896 * LBR are pair registers. The caller is stored 897 * in "from" register, while the callee is stored 898 * in "to" register. 899 * For example, there is a call stack 900 * "A"->"B"->"C"->"D". 901 * The LBR registers will recorde like 902 * "C"->"D", "B"->"C", "A"->"B". 903 * So only the first "to" register and all "from" 904 * registers are needed to construct the whole stack. 905 */ 906 total_nr = i + 1 + lbr_stack->nr + 1; 907 kernel_callchain_nr = i + 1; 908 909 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr); 910 911 for (i = 0; i < kernel_callchain_nr; i++) 912 printf("..... %2d: %016" PRIx64 "\n", 913 i, callchain->ips[i]); 914 915 printf("..... %2d: %016" PRIx64 "\n", 916 (int)(kernel_callchain_nr), lbr_stack->entries[0].to); 917 for (i = 0; i < lbr_stack->nr; i++) 918 printf("..... %2d: %016" PRIx64 "\n", 919 (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from); 920 } 921 } 922 923 static void callchain__printf(struct perf_evsel *evsel, 924 struct perf_sample *sample) 925 { 926 unsigned int i; 927 struct ip_callchain *callchain = sample->callchain; 928 929 if (perf_evsel__has_branch_callstack(evsel)) 930 callchain__lbr_callstack_printf(sample); 931 932 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr); 933 934 for (i = 0; i < callchain->nr; i++) 935 printf("..... %2d: %016" PRIx64 "\n", 936 i, callchain->ips[i]); 937 } 938 939 static void branch_stack__printf(struct perf_sample *sample) 940 { 941 uint64_t i; 942 943 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr); 944 945 for (i = 0; i < sample->branch_stack->nr; i++) { 946 struct branch_entry *e = &sample->branch_stack->entries[i]; 947 948 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n", 949 i, e->from, e->to, 950 (unsigned short)e->flags.cycles, 951 e->flags.mispred ? "M" : " ", 952 e->flags.predicted ? "P" : " ", 953 e->flags.abort ? "A" : " ", 954 e->flags.in_tx ? "T" : " ", 955 (unsigned)e->flags.reserved); 956 } 957 } 958 959 static void regs_dump__printf(u64 mask, u64 *regs) 960 { 961 unsigned rid, i = 0; 962 963 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { 964 u64 val = regs[i++]; 965 966 printf(".... %-5s 0x%" PRIx64 "\n", 967 perf_reg_name(rid), val); 968 } 969 } 970 971 static const char *regs_abi[] = { 972 [PERF_SAMPLE_REGS_ABI_NONE] = "none", 973 [PERF_SAMPLE_REGS_ABI_32] = "32-bit", 974 [PERF_SAMPLE_REGS_ABI_64] = "64-bit", 975 }; 976 977 static inline const char *regs_dump_abi(struct regs_dump *d) 978 { 979 if (d->abi > PERF_SAMPLE_REGS_ABI_64) 980 return "unknown"; 981 982 return regs_abi[d->abi]; 983 } 984 985 static void regs__printf(const char *type, struct regs_dump *regs) 986 { 987 u64 mask = regs->mask; 988 989 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n", 990 type, 991 mask, 992 regs_dump_abi(regs)); 993 994 regs_dump__printf(mask, regs->regs); 995 } 996 997 static void regs_user__printf(struct perf_sample *sample) 998 { 999 struct regs_dump *user_regs = &sample->user_regs; 1000 1001 if (user_regs->regs) 1002 regs__printf("user", user_regs); 1003 } 1004 1005 static void regs_intr__printf(struct perf_sample *sample) 1006 { 1007 struct regs_dump *intr_regs = &sample->intr_regs; 1008 1009 if (intr_regs->regs) 1010 regs__printf("intr", intr_regs); 1011 } 1012 1013 static void stack_user__printf(struct stack_dump *dump) 1014 { 1015 printf("... ustack: size %" PRIu64 ", offset 0x%x\n", 1016 dump->size, dump->offset); 1017 } 1018 1019 static void perf_evlist__print_tstamp(struct perf_evlist *evlist, 1020 union perf_event *event, 1021 struct perf_sample *sample) 1022 { 1023 u64 sample_type = __perf_evlist__combined_sample_type(evlist); 1024 1025 if (event->header.type != PERF_RECORD_SAMPLE && 1026 !perf_evlist__sample_id_all(evlist)) { 1027 fputs("-1 -1 ", stdout); 1028 return; 1029 } 1030 1031 if ((sample_type & PERF_SAMPLE_CPU)) 1032 printf("%u ", sample->cpu); 1033 1034 if (sample_type & PERF_SAMPLE_TIME) 1035 printf("%" PRIu64 " ", sample->time); 1036 } 1037 1038 static void sample_read__printf(struct perf_sample *sample, u64 read_format) 1039 { 1040 printf("... sample_read:\n"); 1041 1042 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1043 printf("...... time enabled %016" PRIx64 "\n", 1044 sample->read.time_enabled); 1045 1046 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1047 printf("...... time running %016" PRIx64 "\n", 1048 sample->read.time_running); 1049 1050 if (read_format & PERF_FORMAT_GROUP) { 1051 u64 i; 1052 1053 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr); 1054 1055 for (i = 0; i < sample->read.group.nr; i++) { 1056 struct sample_read_value *value; 1057 1058 value = &sample->read.group.values[i]; 1059 printf("..... id %016" PRIx64 1060 ", value %016" PRIx64 "\n", 1061 value->id, value->value); 1062 } 1063 } else 1064 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n", 1065 sample->read.one.id, sample->read.one.value); 1066 } 1067 1068 static void dump_event(struct perf_evlist *evlist, union perf_event *event, 1069 u64 file_offset, struct perf_sample *sample) 1070 { 1071 if (!dump_trace) 1072 return; 1073 1074 printf("\n%#" PRIx64 " [%#x]: event: %d\n", 1075 file_offset, event->header.size, event->header.type); 1076 1077 trace_event(event); 1078 1079 if (sample) 1080 perf_evlist__print_tstamp(evlist, event, sample); 1081 1082 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 1083 event->header.size, perf_event__name(event->header.type)); 1084 } 1085 1086 static void dump_sample(struct perf_evsel *evsel, union perf_event *event, 1087 struct perf_sample *sample) 1088 { 1089 u64 sample_type; 1090 1091 if (!dump_trace) 1092 return; 1093 1094 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 1095 event->header.misc, sample->pid, sample->tid, sample->ip, 1096 sample->period, sample->addr); 1097 1098 sample_type = evsel->attr.sample_type; 1099 1100 if (sample_type & PERF_SAMPLE_CALLCHAIN) 1101 callchain__printf(evsel, sample); 1102 1103 if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !perf_evsel__has_branch_callstack(evsel)) 1104 branch_stack__printf(sample); 1105 1106 if (sample_type & PERF_SAMPLE_REGS_USER) 1107 regs_user__printf(sample); 1108 1109 if (sample_type & PERF_SAMPLE_REGS_INTR) 1110 regs_intr__printf(sample); 1111 1112 if (sample_type & PERF_SAMPLE_STACK_USER) 1113 stack_user__printf(&sample->user_stack); 1114 1115 if (sample_type & PERF_SAMPLE_WEIGHT) 1116 printf("... weight: %" PRIu64 "\n", sample->weight); 1117 1118 if (sample_type & PERF_SAMPLE_DATA_SRC) 1119 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src); 1120 1121 if (sample_type & PERF_SAMPLE_TRANSACTION) 1122 printf("... transaction: %" PRIx64 "\n", sample->transaction); 1123 1124 if (sample_type & PERF_SAMPLE_READ) 1125 sample_read__printf(sample, evsel->attr.read_format); 1126 } 1127 1128 static struct machine *machines__find_for_cpumode(struct machines *machines, 1129 union perf_event *event, 1130 struct perf_sample *sample) 1131 { 1132 struct machine *machine; 1133 1134 if (perf_guest && 1135 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 1136 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) { 1137 u32 pid; 1138 1139 if (event->header.type == PERF_RECORD_MMAP 1140 || event->header.type == PERF_RECORD_MMAP2) 1141 pid = event->mmap.pid; 1142 else 1143 pid = sample->pid; 1144 1145 machine = machines__find(machines, pid); 1146 if (!machine) 1147 machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID); 1148 return machine; 1149 } 1150 1151 return &machines->host; 1152 } 1153 1154 static int deliver_sample_value(struct perf_evlist *evlist, 1155 struct perf_tool *tool, 1156 union perf_event *event, 1157 struct perf_sample *sample, 1158 struct sample_read_value *v, 1159 struct machine *machine) 1160 { 1161 struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id); 1162 1163 if (sid) { 1164 sample->id = v->id; 1165 sample->period = v->value - sid->period; 1166 sid->period = v->value; 1167 } 1168 1169 if (!sid || sid->evsel == NULL) { 1170 ++evlist->stats.nr_unknown_id; 1171 return 0; 1172 } 1173 1174 return tool->sample(tool, event, sample, sid->evsel, machine); 1175 } 1176 1177 static int deliver_sample_group(struct perf_evlist *evlist, 1178 struct perf_tool *tool, 1179 union perf_event *event, 1180 struct perf_sample *sample, 1181 struct machine *machine) 1182 { 1183 int ret = -EINVAL; 1184 u64 i; 1185 1186 for (i = 0; i < sample->read.group.nr; i++) { 1187 ret = deliver_sample_value(evlist, tool, event, sample, 1188 &sample->read.group.values[i], 1189 machine); 1190 if (ret) 1191 break; 1192 } 1193 1194 return ret; 1195 } 1196 1197 static int 1198 perf_evlist__deliver_sample(struct perf_evlist *evlist, 1199 struct perf_tool *tool, 1200 union perf_event *event, 1201 struct perf_sample *sample, 1202 struct perf_evsel *evsel, 1203 struct machine *machine) 1204 { 1205 /* We know evsel != NULL. */ 1206 u64 sample_type = evsel->attr.sample_type; 1207 u64 read_format = evsel->attr.read_format; 1208 1209 /* Standard sample delivery. */ 1210 if (!(sample_type & PERF_SAMPLE_READ)) 1211 return tool->sample(tool, event, sample, evsel, machine); 1212 1213 /* For PERF_SAMPLE_READ we have either single or group mode. */ 1214 if (read_format & PERF_FORMAT_GROUP) 1215 return deliver_sample_group(evlist, tool, event, sample, 1216 machine); 1217 else 1218 return deliver_sample_value(evlist, tool, event, sample, 1219 &sample->read.one, machine); 1220 } 1221 1222 static int machines__deliver_event(struct machines *machines, 1223 struct perf_evlist *evlist, 1224 union perf_event *event, 1225 struct perf_sample *sample, 1226 struct perf_tool *tool, u64 file_offset) 1227 { 1228 struct perf_evsel *evsel; 1229 struct machine *machine; 1230 1231 dump_event(evlist, event, file_offset, sample); 1232 1233 evsel = perf_evlist__id2evsel(evlist, sample->id); 1234 1235 machine = machines__find_for_cpumode(machines, event, sample); 1236 1237 switch (event->header.type) { 1238 case PERF_RECORD_SAMPLE: 1239 if (evsel == NULL) { 1240 ++evlist->stats.nr_unknown_id; 1241 return 0; 1242 } 1243 dump_sample(evsel, event, sample); 1244 if (machine == NULL) { 1245 ++evlist->stats.nr_unprocessable_samples; 1246 return 0; 1247 } 1248 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine); 1249 case PERF_RECORD_MMAP: 1250 return tool->mmap(tool, event, sample, machine); 1251 case PERF_RECORD_MMAP2: 1252 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT) 1253 ++evlist->stats.nr_proc_map_timeout; 1254 return tool->mmap2(tool, event, sample, machine); 1255 case PERF_RECORD_COMM: 1256 return tool->comm(tool, event, sample, machine); 1257 case PERF_RECORD_NAMESPACES: 1258 return tool->namespaces(tool, event, sample, machine); 1259 case PERF_RECORD_FORK: 1260 return tool->fork(tool, event, sample, machine); 1261 case PERF_RECORD_EXIT: 1262 return tool->exit(tool, event, sample, machine); 1263 case PERF_RECORD_LOST: 1264 if (tool->lost == perf_event__process_lost) 1265 evlist->stats.total_lost += event->lost.lost; 1266 return tool->lost(tool, event, sample, machine); 1267 case PERF_RECORD_LOST_SAMPLES: 1268 if (tool->lost_samples == perf_event__process_lost_samples) 1269 evlist->stats.total_lost_samples += event->lost_samples.lost; 1270 return tool->lost_samples(tool, event, sample, machine); 1271 case PERF_RECORD_READ: 1272 return tool->read(tool, event, sample, evsel, machine); 1273 case PERF_RECORD_THROTTLE: 1274 return tool->throttle(tool, event, sample, machine); 1275 case PERF_RECORD_UNTHROTTLE: 1276 return tool->unthrottle(tool, event, sample, machine); 1277 case PERF_RECORD_AUX: 1278 if (tool->aux == perf_event__process_aux) { 1279 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) 1280 evlist->stats.total_aux_lost += 1; 1281 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL) 1282 evlist->stats.total_aux_partial += 1; 1283 } 1284 return tool->aux(tool, event, sample, machine); 1285 case PERF_RECORD_ITRACE_START: 1286 return tool->itrace_start(tool, event, sample, machine); 1287 case PERF_RECORD_SWITCH: 1288 case PERF_RECORD_SWITCH_CPU_WIDE: 1289 return tool->context_switch(tool, event, sample, machine); 1290 default: 1291 ++evlist->stats.nr_unknown_events; 1292 return -1; 1293 } 1294 } 1295 1296 static int perf_session__deliver_event(struct perf_session *session, 1297 union perf_event *event, 1298 struct perf_sample *sample, 1299 struct perf_tool *tool, 1300 u64 file_offset) 1301 { 1302 int ret; 1303 1304 ret = auxtrace__process_event(session, event, sample, tool); 1305 if (ret < 0) 1306 return ret; 1307 if (ret > 0) 1308 return 0; 1309 1310 return machines__deliver_event(&session->machines, session->evlist, 1311 event, sample, tool, file_offset); 1312 } 1313 1314 static s64 perf_session__process_user_event(struct perf_session *session, 1315 union perf_event *event, 1316 u64 file_offset) 1317 { 1318 struct ordered_events *oe = &session->ordered_events; 1319 struct perf_tool *tool = session->tool; 1320 int fd = perf_data_file__fd(session->file); 1321 int err; 1322 1323 dump_event(session->evlist, event, file_offset, NULL); 1324 1325 /* These events are processed right away */ 1326 switch (event->header.type) { 1327 case PERF_RECORD_HEADER_ATTR: 1328 err = tool->attr(tool, event, &session->evlist); 1329 if (err == 0) { 1330 perf_session__set_id_hdr_size(session); 1331 perf_session__set_comm_exec(session); 1332 } 1333 return err; 1334 case PERF_RECORD_EVENT_UPDATE: 1335 return tool->event_update(tool, event, &session->evlist); 1336 case PERF_RECORD_HEADER_EVENT_TYPE: 1337 /* 1338 * Depreceated, but we need to handle it for sake 1339 * of old data files create in pipe mode. 1340 */ 1341 return 0; 1342 case PERF_RECORD_HEADER_TRACING_DATA: 1343 /* setup for reading amidst mmap */ 1344 lseek(fd, file_offset, SEEK_SET); 1345 return tool->tracing_data(tool, event, session); 1346 case PERF_RECORD_HEADER_BUILD_ID: 1347 return tool->build_id(tool, event, session); 1348 case PERF_RECORD_FINISHED_ROUND: 1349 return tool->finished_round(tool, event, oe); 1350 case PERF_RECORD_ID_INDEX: 1351 return tool->id_index(tool, event, session); 1352 case PERF_RECORD_AUXTRACE_INFO: 1353 return tool->auxtrace_info(tool, event, session); 1354 case PERF_RECORD_AUXTRACE: 1355 /* setup for reading amidst mmap */ 1356 lseek(fd, file_offset + event->header.size, SEEK_SET); 1357 return tool->auxtrace(tool, event, session); 1358 case PERF_RECORD_AUXTRACE_ERROR: 1359 perf_session__auxtrace_error_inc(session, event); 1360 return tool->auxtrace_error(tool, event, session); 1361 case PERF_RECORD_THREAD_MAP: 1362 return tool->thread_map(tool, event, session); 1363 case PERF_RECORD_CPU_MAP: 1364 return tool->cpu_map(tool, event, session); 1365 case PERF_RECORD_STAT_CONFIG: 1366 return tool->stat_config(tool, event, session); 1367 case PERF_RECORD_STAT: 1368 return tool->stat(tool, event, session); 1369 case PERF_RECORD_STAT_ROUND: 1370 return tool->stat_round(tool, event, session); 1371 case PERF_RECORD_TIME_CONV: 1372 session->time_conv = event->time_conv; 1373 return tool->time_conv(tool, event, session); 1374 default: 1375 return -EINVAL; 1376 } 1377 } 1378 1379 int perf_session__deliver_synth_event(struct perf_session *session, 1380 union perf_event *event, 1381 struct perf_sample *sample) 1382 { 1383 struct perf_evlist *evlist = session->evlist; 1384 struct perf_tool *tool = session->tool; 1385 1386 events_stats__inc(&evlist->stats, event->header.type); 1387 1388 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1389 return perf_session__process_user_event(session, event, 0); 1390 1391 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0); 1392 } 1393 1394 static void event_swap(union perf_event *event, bool sample_id_all) 1395 { 1396 perf_event__swap_op swap; 1397 1398 swap = perf_event__swap_ops[event->header.type]; 1399 if (swap) 1400 swap(event, sample_id_all); 1401 } 1402 1403 int perf_session__peek_event(struct perf_session *session, off_t file_offset, 1404 void *buf, size_t buf_sz, 1405 union perf_event **event_ptr, 1406 struct perf_sample *sample) 1407 { 1408 union perf_event *event; 1409 size_t hdr_sz, rest; 1410 int fd; 1411 1412 if (session->one_mmap && !session->header.needs_swap) { 1413 event = file_offset - session->one_mmap_offset + 1414 session->one_mmap_addr; 1415 goto out_parse_sample; 1416 } 1417 1418 if (perf_data_file__is_pipe(session->file)) 1419 return -1; 1420 1421 fd = perf_data_file__fd(session->file); 1422 hdr_sz = sizeof(struct perf_event_header); 1423 1424 if (buf_sz < hdr_sz) 1425 return -1; 1426 1427 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 || 1428 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz) 1429 return -1; 1430 1431 event = (union perf_event *)buf; 1432 1433 if (session->header.needs_swap) 1434 perf_event_header__bswap(&event->header); 1435 1436 if (event->header.size < hdr_sz || event->header.size > buf_sz) 1437 return -1; 1438 1439 rest = event->header.size - hdr_sz; 1440 1441 if (readn(fd, buf, rest) != (ssize_t)rest) 1442 return -1; 1443 1444 if (session->header.needs_swap) 1445 event_swap(event, perf_evlist__sample_id_all(session->evlist)); 1446 1447 out_parse_sample: 1448 1449 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START && 1450 perf_evlist__parse_sample(session->evlist, event, sample)) 1451 return -1; 1452 1453 *event_ptr = event; 1454 1455 return 0; 1456 } 1457 1458 static s64 perf_session__process_event(struct perf_session *session, 1459 union perf_event *event, u64 file_offset) 1460 { 1461 struct perf_evlist *evlist = session->evlist; 1462 struct perf_tool *tool = session->tool; 1463 struct perf_sample sample; 1464 int ret; 1465 1466 if (session->header.needs_swap) 1467 event_swap(event, perf_evlist__sample_id_all(evlist)); 1468 1469 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1470 return -EINVAL; 1471 1472 events_stats__inc(&evlist->stats, event->header.type); 1473 1474 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1475 return perf_session__process_user_event(session, event, file_offset); 1476 1477 /* 1478 * For all kernel events we get the sample data 1479 */ 1480 ret = perf_evlist__parse_sample(evlist, event, &sample); 1481 if (ret) 1482 return ret; 1483 1484 if (tool->ordered_events) { 1485 ret = perf_session__queue_event(session, event, &sample, file_offset); 1486 if (ret != -ETIME) 1487 return ret; 1488 } 1489 1490 return perf_session__deliver_event(session, event, &sample, tool, 1491 file_offset); 1492 } 1493 1494 void perf_event_header__bswap(struct perf_event_header *hdr) 1495 { 1496 hdr->type = bswap_32(hdr->type); 1497 hdr->misc = bswap_16(hdr->misc); 1498 hdr->size = bswap_16(hdr->size); 1499 } 1500 1501 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1502 { 1503 return machine__findnew_thread(&session->machines.host, -1, pid); 1504 } 1505 1506 int perf_session__register_idle_thread(struct perf_session *session) 1507 { 1508 struct thread *thread; 1509 int err = 0; 1510 1511 thread = machine__findnew_thread(&session->machines.host, 0, 0); 1512 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) { 1513 pr_err("problem inserting idle task.\n"); 1514 err = -1; 1515 } 1516 1517 if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) { 1518 pr_err("problem inserting idle task.\n"); 1519 err = -1; 1520 } 1521 1522 /* machine__findnew_thread() got the thread, so put it */ 1523 thread__put(thread); 1524 return err; 1525 } 1526 1527 static void 1528 perf_session__warn_order(const struct perf_session *session) 1529 { 1530 const struct ordered_events *oe = &session->ordered_events; 1531 struct perf_evsel *evsel; 1532 bool should_warn = true; 1533 1534 evlist__for_each_entry(session->evlist, evsel) { 1535 if (evsel->attr.write_backward) 1536 should_warn = false; 1537 } 1538 1539 if (!should_warn) 1540 return; 1541 if (oe->nr_unordered_events != 0) 1542 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events); 1543 } 1544 1545 static void perf_session__warn_about_errors(const struct perf_session *session) 1546 { 1547 const struct events_stats *stats = &session->evlist->stats; 1548 1549 if (session->tool->lost == perf_event__process_lost && 1550 stats->nr_events[PERF_RECORD_LOST] != 0) { 1551 ui__warning("Processed %d events and lost %d chunks!\n\n" 1552 "Check IO/CPU overload!\n\n", 1553 stats->nr_events[0], 1554 stats->nr_events[PERF_RECORD_LOST]); 1555 } 1556 1557 if (session->tool->lost_samples == perf_event__process_lost_samples) { 1558 double drop_rate; 1559 1560 drop_rate = (double)stats->total_lost_samples / 1561 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples); 1562 if (drop_rate > 0.05) { 1563 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%% samples!\n\n", 1564 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples, 1565 drop_rate * 100.0); 1566 } 1567 } 1568 1569 if (session->tool->aux == perf_event__process_aux && 1570 stats->total_aux_lost != 0) { 1571 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n", 1572 stats->total_aux_lost, 1573 stats->nr_events[PERF_RECORD_AUX]); 1574 } 1575 1576 if (session->tool->aux == perf_event__process_aux && 1577 stats->total_aux_partial != 0) { 1578 bool vmm_exclusive = false; 1579 1580 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive", 1581 &vmm_exclusive); 1582 1583 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n" 1584 "Are you running a KVM guest in the background?%s\n\n", 1585 stats->total_aux_partial, 1586 stats->nr_events[PERF_RECORD_AUX], 1587 vmm_exclusive ? 1588 "\nReloading kvm_intel module with vmm_exclusive=0\n" 1589 "will reduce the gaps to only guest's timeslices." : 1590 ""); 1591 } 1592 1593 if (stats->nr_unknown_events != 0) { 1594 ui__warning("Found %u unknown events!\n\n" 1595 "Is this an older tool processing a perf.data " 1596 "file generated by a more recent tool?\n\n" 1597 "If that is not the case, consider " 1598 "reporting to linux-kernel@vger.kernel.org.\n\n", 1599 stats->nr_unknown_events); 1600 } 1601 1602 if (stats->nr_unknown_id != 0) { 1603 ui__warning("%u samples with id not present in the header\n", 1604 stats->nr_unknown_id); 1605 } 1606 1607 if (stats->nr_invalid_chains != 0) { 1608 ui__warning("Found invalid callchains!\n\n" 1609 "%u out of %u events were discarded for this reason.\n\n" 1610 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1611 stats->nr_invalid_chains, 1612 stats->nr_events[PERF_RECORD_SAMPLE]); 1613 } 1614 1615 if (stats->nr_unprocessable_samples != 0) { 1616 ui__warning("%u unprocessable samples recorded.\n" 1617 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1618 stats->nr_unprocessable_samples); 1619 } 1620 1621 perf_session__warn_order(session); 1622 1623 events_stats__auxtrace_error_warn(stats); 1624 1625 if (stats->nr_proc_map_timeout != 0) { 1626 ui__warning("%d map information files for pre-existing threads were\n" 1627 "not processed, if there are samples for addresses they\n" 1628 "will not be resolved, you may find out which are these\n" 1629 "threads by running with -v and redirecting the output\n" 1630 "to a file.\n" 1631 "The time limit to process proc map is too short?\n" 1632 "Increase it by --proc-map-timeout\n", 1633 stats->nr_proc_map_timeout); 1634 } 1635 } 1636 1637 static int perf_session__flush_thread_stack(struct thread *thread, 1638 void *p __maybe_unused) 1639 { 1640 return thread_stack__flush(thread); 1641 } 1642 1643 static int perf_session__flush_thread_stacks(struct perf_session *session) 1644 { 1645 return machines__for_each_thread(&session->machines, 1646 perf_session__flush_thread_stack, 1647 NULL); 1648 } 1649 1650 volatile int session_done; 1651 1652 static int __perf_session__process_pipe_events(struct perf_session *session) 1653 { 1654 struct ordered_events *oe = &session->ordered_events; 1655 struct perf_tool *tool = session->tool; 1656 int fd = perf_data_file__fd(session->file); 1657 union perf_event *event; 1658 uint32_t size, cur_size = 0; 1659 void *buf = NULL; 1660 s64 skip = 0; 1661 u64 head; 1662 ssize_t err; 1663 void *p; 1664 1665 perf_tool__fill_defaults(tool); 1666 1667 head = 0; 1668 cur_size = sizeof(union perf_event); 1669 1670 buf = malloc(cur_size); 1671 if (!buf) 1672 return -errno; 1673 ordered_events__set_copy_on_queue(oe, true); 1674 more: 1675 event = buf; 1676 err = readn(fd, event, sizeof(struct perf_event_header)); 1677 if (err <= 0) { 1678 if (err == 0) 1679 goto done; 1680 1681 pr_err("failed to read event header\n"); 1682 goto out_err; 1683 } 1684 1685 if (session->header.needs_swap) 1686 perf_event_header__bswap(&event->header); 1687 1688 size = event->header.size; 1689 if (size < sizeof(struct perf_event_header)) { 1690 pr_err("bad event header size\n"); 1691 goto out_err; 1692 } 1693 1694 if (size > cur_size) { 1695 void *new = realloc(buf, size); 1696 if (!new) { 1697 pr_err("failed to allocate memory to read event\n"); 1698 goto out_err; 1699 } 1700 buf = new; 1701 cur_size = size; 1702 event = buf; 1703 } 1704 p = event; 1705 p += sizeof(struct perf_event_header); 1706 1707 if (size - sizeof(struct perf_event_header)) { 1708 err = readn(fd, p, size - sizeof(struct perf_event_header)); 1709 if (err <= 0) { 1710 if (err == 0) { 1711 pr_err("unexpected end of event stream\n"); 1712 goto done; 1713 } 1714 1715 pr_err("failed to read event data\n"); 1716 goto out_err; 1717 } 1718 } 1719 1720 if ((skip = perf_session__process_event(session, event, head)) < 0) { 1721 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1722 head, event->header.size, event->header.type); 1723 err = -EINVAL; 1724 goto out_err; 1725 } 1726 1727 head += size; 1728 1729 if (skip > 0) 1730 head += skip; 1731 1732 if (!session_done()) 1733 goto more; 1734 done: 1735 /* do the final flush for ordered samples */ 1736 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 1737 if (err) 1738 goto out_err; 1739 err = auxtrace__flush_events(session, tool); 1740 if (err) 1741 goto out_err; 1742 err = perf_session__flush_thread_stacks(session); 1743 out_err: 1744 free(buf); 1745 perf_session__warn_about_errors(session); 1746 ordered_events__free(&session->ordered_events); 1747 auxtrace__free_events(session); 1748 return err; 1749 } 1750 1751 static union perf_event * 1752 fetch_mmaped_event(struct perf_session *session, 1753 u64 head, size_t mmap_size, char *buf) 1754 { 1755 union perf_event *event; 1756 1757 /* 1758 * Ensure we have enough space remaining to read 1759 * the size of the event in the headers. 1760 */ 1761 if (head + sizeof(event->header) > mmap_size) 1762 return NULL; 1763 1764 event = (union perf_event *)(buf + head); 1765 1766 if (session->header.needs_swap) 1767 perf_event_header__bswap(&event->header); 1768 1769 if (head + event->header.size > mmap_size) { 1770 /* We're not fetching the event so swap back again */ 1771 if (session->header.needs_swap) 1772 perf_event_header__bswap(&event->header); 1773 return NULL; 1774 } 1775 1776 return event; 1777 } 1778 1779 /* 1780 * On 64bit we can mmap the data file in one go. No need for tiny mmap 1781 * slices. On 32bit we use 32MB. 1782 */ 1783 #if BITS_PER_LONG == 64 1784 #define MMAP_SIZE ULLONG_MAX 1785 #define NUM_MMAPS 1 1786 #else 1787 #define MMAP_SIZE (32 * 1024 * 1024ULL) 1788 #define NUM_MMAPS 128 1789 #endif 1790 1791 static int __perf_session__process_events(struct perf_session *session, 1792 u64 data_offset, u64 data_size, 1793 u64 file_size) 1794 { 1795 struct ordered_events *oe = &session->ordered_events; 1796 struct perf_tool *tool = session->tool; 1797 int fd = perf_data_file__fd(session->file); 1798 u64 head, page_offset, file_offset, file_pos, size; 1799 int err, mmap_prot, mmap_flags, map_idx = 0; 1800 size_t mmap_size; 1801 char *buf, *mmaps[NUM_MMAPS]; 1802 union perf_event *event; 1803 struct ui_progress prog; 1804 s64 skip; 1805 1806 perf_tool__fill_defaults(tool); 1807 1808 page_offset = page_size * (data_offset / page_size); 1809 file_offset = page_offset; 1810 head = data_offset - page_offset; 1811 1812 if (data_size == 0) 1813 goto out; 1814 1815 if (data_offset + data_size < file_size) 1816 file_size = data_offset + data_size; 1817 1818 ui_progress__init(&prog, file_size, "Processing events..."); 1819 1820 mmap_size = MMAP_SIZE; 1821 if (mmap_size > file_size) { 1822 mmap_size = file_size; 1823 session->one_mmap = true; 1824 } 1825 1826 memset(mmaps, 0, sizeof(mmaps)); 1827 1828 mmap_prot = PROT_READ; 1829 mmap_flags = MAP_SHARED; 1830 1831 if (session->header.needs_swap) { 1832 mmap_prot |= PROT_WRITE; 1833 mmap_flags = MAP_PRIVATE; 1834 } 1835 remap: 1836 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd, 1837 file_offset); 1838 if (buf == MAP_FAILED) { 1839 pr_err("failed to mmap file\n"); 1840 err = -errno; 1841 goto out_err; 1842 } 1843 mmaps[map_idx] = buf; 1844 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 1845 file_pos = file_offset + head; 1846 if (session->one_mmap) { 1847 session->one_mmap_addr = buf; 1848 session->one_mmap_offset = file_offset; 1849 } 1850 1851 more: 1852 event = fetch_mmaped_event(session, head, mmap_size, buf); 1853 if (!event) { 1854 if (mmaps[map_idx]) { 1855 munmap(mmaps[map_idx], mmap_size); 1856 mmaps[map_idx] = NULL; 1857 } 1858 1859 page_offset = page_size * (head / page_size); 1860 file_offset += page_offset; 1861 head -= page_offset; 1862 goto remap; 1863 } 1864 1865 size = event->header.size; 1866 1867 if (size < sizeof(struct perf_event_header) || 1868 (skip = perf_session__process_event(session, event, file_pos)) < 0) { 1869 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1870 file_offset + head, event->header.size, 1871 event->header.type); 1872 err = -EINVAL; 1873 goto out_err; 1874 } 1875 1876 if (skip) 1877 size += skip; 1878 1879 head += size; 1880 file_pos += size; 1881 1882 ui_progress__update(&prog, size); 1883 1884 if (session_done()) 1885 goto out; 1886 1887 if (file_pos < file_size) 1888 goto more; 1889 1890 out: 1891 /* do the final flush for ordered samples */ 1892 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 1893 if (err) 1894 goto out_err; 1895 err = auxtrace__flush_events(session, tool); 1896 if (err) 1897 goto out_err; 1898 err = perf_session__flush_thread_stacks(session); 1899 out_err: 1900 ui_progress__finish(); 1901 perf_session__warn_about_errors(session); 1902 /* 1903 * We may switching perf.data output, make ordered_events 1904 * reusable. 1905 */ 1906 ordered_events__reinit(&session->ordered_events); 1907 auxtrace__free_events(session); 1908 session->one_mmap = false; 1909 return err; 1910 } 1911 1912 int perf_session__process_events(struct perf_session *session) 1913 { 1914 u64 size = perf_data_file__size(session->file); 1915 int err; 1916 1917 if (perf_session__register_idle_thread(session) < 0) 1918 return -ENOMEM; 1919 1920 if (!perf_data_file__is_pipe(session->file)) 1921 err = __perf_session__process_events(session, 1922 session->header.data_offset, 1923 session->header.data_size, size); 1924 else 1925 err = __perf_session__process_pipe_events(session); 1926 1927 return err; 1928 } 1929 1930 bool perf_session__has_traces(struct perf_session *session, const char *msg) 1931 { 1932 struct perf_evsel *evsel; 1933 1934 evlist__for_each_entry(session->evlist, evsel) { 1935 if (evsel->attr.type == PERF_TYPE_TRACEPOINT) 1936 return true; 1937 } 1938 1939 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 1940 return false; 1941 } 1942 1943 int maps__set_kallsyms_ref_reloc_sym(struct map **maps, 1944 const char *symbol_name, u64 addr) 1945 { 1946 char *bracket; 1947 int i; 1948 struct ref_reloc_sym *ref; 1949 1950 ref = zalloc(sizeof(struct ref_reloc_sym)); 1951 if (ref == NULL) 1952 return -ENOMEM; 1953 1954 ref->name = strdup(symbol_name); 1955 if (ref->name == NULL) { 1956 free(ref); 1957 return -ENOMEM; 1958 } 1959 1960 bracket = strchr(ref->name, ']'); 1961 if (bracket) 1962 *bracket = '\0'; 1963 1964 ref->addr = addr; 1965 1966 for (i = 0; i < MAP__NR_TYPES; ++i) { 1967 struct kmap *kmap = map__kmap(maps[i]); 1968 1969 if (!kmap) 1970 continue; 1971 kmap->ref_reloc_sym = ref; 1972 } 1973 1974 return 0; 1975 } 1976 1977 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp) 1978 { 1979 return machines__fprintf_dsos(&session->machines, fp); 1980 } 1981 1982 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp, 1983 bool (skip)(struct dso *dso, int parm), int parm) 1984 { 1985 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm); 1986 } 1987 1988 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 1989 { 1990 size_t ret; 1991 const char *msg = ""; 1992 1993 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE)) 1994 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)"; 1995 1996 ret = fprintf(fp, "\nAggregated stats:%s\n", msg); 1997 1998 ret += events_stats__fprintf(&session->evlist->stats, fp); 1999 return ret; 2000 } 2001 2002 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 2003 { 2004 /* 2005 * FIXME: Here we have to actually print all the machines in this 2006 * session, not just the host... 2007 */ 2008 return machine__fprintf(&session->machines.host, fp); 2009 } 2010 2011 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, 2012 unsigned int type) 2013 { 2014 struct perf_evsel *pos; 2015 2016 evlist__for_each_entry(session->evlist, pos) { 2017 if (pos->attr.type == type) 2018 return pos; 2019 } 2020 return NULL; 2021 } 2022 2023 int perf_session__cpu_bitmap(struct perf_session *session, 2024 const char *cpu_list, unsigned long *cpu_bitmap) 2025 { 2026 int i, err = -1; 2027 struct cpu_map *map; 2028 2029 for (i = 0; i < PERF_TYPE_MAX; ++i) { 2030 struct perf_evsel *evsel; 2031 2032 evsel = perf_session__find_first_evtype(session, i); 2033 if (!evsel) 2034 continue; 2035 2036 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) { 2037 pr_err("File does not contain CPU events. " 2038 "Remove -C option to proceed.\n"); 2039 return -1; 2040 } 2041 } 2042 2043 map = cpu_map__new(cpu_list); 2044 if (map == NULL) { 2045 pr_err("Invalid cpu_list\n"); 2046 return -1; 2047 } 2048 2049 for (i = 0; i < map->nr; i++) { 2050 int cpu = map->map[i]; 2051 2052 if (cpu >= MAX_NR_CPUS) { 2053 pr_err("Requested CPU %d too large. " 2054 "Consider raising MAX_NR_CPUS\n", cpu); 2055 goto out_delete_map; 2056 } 2057 2058 set_bit(cpu, cpu_bitmap); 2059 } 2060 2061 err = 0; 2062 2063 out_delete_map: 2064 cpu_map__put(map); 2065 return err; 2066 } 2067 2068 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 2069 bool full) 2070 { 2071 if (session == NULL || fp == NULL) 2072 return; 2073 2074 fprintf(fp, "# ========\n"); 2075 perf_header__fprintf_info(session, fp, full); 2076 fprintf(fp, "# ========\n#\n"); 2077 } 2078 2079 2080 int __perf_session__set_tracepoints_handlers(struct perf_session *session, 2081 const struct perf_evsel_str_handler *assocs, 2082 size_t nr_assocs) 2083 { 2084 struct perf_evsel *evsel; 2085 size_t i; 2086 int err; 2087 2088 for (i = 0; i < nr_assocs; i++) { 2089 /* 2090 * Adding a handler for an event not in the session, 2091 * just ignore it. 2092 */ 2093 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name); 2094 if (evsel == NULL) 2095 continue; 2096 2097 err = -EEXIST; 2098 if (evsel->handler != NULL) 2099 goto out; 2100 evsel->handler = assocs[i].handler; 2101 } 2102 2103 err = 0; 2104 out: 2105 return err; 2106 } 2107 2108 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused, 2109 union perf_event *event, 2110 struct perf_session *session) 2111 { 2112 struct perf_evlist *evlist = session->evlist; 2113 struct id_index_event *ie = &event->id_index; 2114 size_t i, nr, max_nr; 2115 2116 max_nr = (ie->header.size - sizeof(struct id_index_event)) / 2117 sizeof(struct id_index_entry); 2118 nr = ie->nr; 2119 if (nr > max_nr) 2120 return -EINVAL; 2121 2122 if (dump_trace) 2123 fprintf(stdout, " nr: %zu\n", nr); 2124 2125 for (i = 0; i < nr; i++) { 2126 struct id_index_entry *e = &ie->entries[i]; 2127 struct perf_sample_id *sid; 2128 2129 if (dump_trace) { 2130 fprintf(stdout, " ... id: %"PRIu64, e->id); 2131 fprintf(stdout, " idx: %"PRIu64, e->idx); 2132 fprintf(stdout, " cpu: %"PRId64, e->cpu); 2133 fprintf(stdout, " tid: %"PRId64"\n", e->tid); 2134 } 2135 2136 sid = perf_evlist__id2sid(evlist, e->id); 2137 if (!sid) 2138 return -ENOENT; 2139 sid->idx = e->idx; 2140 sid->cpu = e->cpu; 2141 sid->tid = e->tid; 2142 } 2143 return 0; 2144 } 2145 2146 int perf_event__synthesize_id_index(struct perf_tool *tool, 2147 perf_event__handler_t process, 2148 struct perf_evlist *evlist, 2149 struct machine *machine) 2150 { 2151 union perf_event *ev; 2152 struct perf_evsel *evsel; 2153 size_t nr = 0, i = 0, sz, max_nr, n; 2154 int err; 2155 2156 pr_debug2("Synthesizing id index\n"); 2157 2158 max_nr = (UINT16_MAX - sizeof(struct id_index_event)) / 2159 sizeof(struct id_index_entry); 2160 2161 evlist__for_each_entry(evlist, evsel) 2162 nr += evsel->ids; 2163 2164 n = nr > max_nr ? max_nr : nr; 2165 sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry); 2166 ev = zalloc(sz); 2167 if (!ev) 2168 return -ENOMEM; 2169 2170 ev->id_index.header.type = PERF_RECORD_ID_INDEX; 2171 ev->id_index.header.size = sz; 2172 ev->id_index.nr = n; 2173 2174 evlist__for_each_entry(evlist, evsel) { 2175 u32 j; 2176 2177 for (j = 0; j < evsel->ids; j++) { 2178 struct id_index_entry *e; 2179 struct perf_sample_id *sid; 2180 2181 if (i >= n) { 2182 err = process(tool, ev, NULL, machine); 2183 if (err) 2184 goto out_err; 2185 nr -= n; 2186 i = 0; 2187 } 2188 2189 e = &ev->id_index.entries[i++]; 2190 2191 e->id = evsel->id[j]; 2192 2193 sid = perf_evlist__id2sid(evlist, e->id); 2194 if (!sid) { 2195 free(ev); 2196 return -ENOENT; 2197 } 2198 2199 e->idx = sid->idx; 2200 e->cpu = sid->cpu; 2201 e->tid = sid->tid; 2202 } 2203 } 2204 2205 sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry); 2206 ev->id_index.header.size = sz; 2207 ev->id_index.nr = nr; 2208 2209 err = process(tool, ev, NULL, machine); 2210 out_err: 2211 free(ev); 2212 2213 return err; 2214 } 2215