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