1 #include <linux/kernel.h> 2 #include <traceevent/event-parse.h> 3 4 #include <byteswap.h> 5 #include <unistd.h> 6 #include <sys/types.h> 7 #include <sys/mman.h> 8 9 #include "evlist.h" 10 #include "evsel.h" 11 #include "session.h" 12 #include "tool.h" 13 #include "sort.h" 14 #include "util.h" 15 #include "cpumap.h" 16 #include "perf_regs.h" 17 #include "asm/bug.h" 18 #include "auxtrace.h" 19 #include "thread-stack.h" 20 #include "stat.h" 21 22 static int perf_session__deliver_event(struct perf_session *session, 23 union perf_event *event, 24 struct perf_sample *sample, 25 struct perf_tool *tool, 26 u64 file_offset); 27 28 static int perf_session__open(struct perf_session *session) 29 { 30 struct perf_data_file *file = session->file; 31 32 if (perf_session__read_header(session) < 0) { 33 pr_err("incompatible file format (rerun with -v to learn more)\n"); 34 return -1; 35 } 36 37 if (perf_data_file__is_pipe(file)) 38 return 0; 39 40 if (perf_header__has_feat(&session->header, HEADER_STAT)) 41 return 0; 42 43 if (!perf_evlist__valid_sample_type(session->evlist)) { 44 pr_err("non matching sample_type\n"); 45 return -1; 46 } 47 48 if (!perf_evlist__valid_sample_id_all(session->evlist)) { 49 pr_err("non matching sample_id_all\n"); 50 return -1; 51 } 52 53 if (!perf_evlist__valid_read_format(session->evlist)) { 54 pr_err("non matching read_format\n"); 55 return -1; 56 } 57 58 return 0; 59 } 60 61 void perf_session__set_id_hdr_size(struct perf_session *session) 62 { 63 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist); 64 65 machines__set_id_hdr_size(&session->machines, id_hdr_size); 66 } 67 68 int perf_session__create_kernel_maps(struct perf_session *session) 69 { 70 int ret = machine__create_kernel_maps(&session->machines.host); 71 72 if (ret >= 0) 73 ret = machines__create_guest_kernel_maps(&session->machines); 74 return ret; 75 } 76 77 static void perf_session__destroy_kernel_maps(struct perf_session *session) 78 { 79 machines__destroy_kernel_maps(&session->machines); 80 } 81 82 static bool perf_session__has_comm_exec(struct perf_session *session) 83 { 84 struct perf_evsel *evsel; 85 86 evlist__for_each(session->evlist, evsel) { 87 if (evsel->attr.comm_exec) 88 return true; 89 } 90 91 return false; 92 } 93 94 static void perf_session__set_comm_exec(struct perf_session *session) 95 { 96 bool comm_exec = perf_session__has_comm_exec(session); 97 98 machines__set_comm_exec(&session->machines, comm_exec); 99 } 100 101 static int ordered_events__deliver_event(struct ordered_events *oe, 102 struct ordered_event *event) 103 { 104 struct perf_sample sample; 105 struct perf_session *session = container_of(oe, struct perf_session, 106 ordered_events); 107 int ret = perf_evlist__parse_sample(session->evlist, event->event, &sample); 108 109 if (ret) { 110 pr_err("Can't parse sample, err = %d\n", ret); 111 return ret; 112 } 113 114 return perf_session__deliver_event(session, event->event, &sample, 115 session->tool, event->file_offset); 116 } 117 118 struct perf_session *perf_session__new(struct perf_data_file *file, 119 bool repipe, struct perf_tool *tool) 120 { 121 struct perf_session *session = zalloc(sizeof(*session)); 122 123 if (!session) 124 goto out; 125 126 session->repipe = repipe; 127 session->tool = tool; 128 INIT_LIST_HEAD(&session->auxtrace_index); 129 machines__init(&session->machines); 130 ordered_events__init(&session->ordered_events, ordered_events__deliver_event); 131 132 if (file) { 133 if (perf_data_file__open(file)) 134 goto out_delete; 135 136 session->file = file; 137 138 if (perf_data_file__is_read(file)) { 139 if (perf_session__open(session) < 0) 140 goto out_close; 141 142 perf_session__set_id_hdr_size(session); 143 perf_session__set_comm_exec(session); 144 } 145 } else { 146 session->machines.host.env = &perf_env; 147 } 148 149 if (!file || perf_data_file__is_write(file)) { 150 /* 151 * In O_RDONLY mode this will be performed when reading the 152 * kernel MMAP event, in perf_event__process_mmap(). 153 */ 154 if (perf_session__create_kernel_maps(session) < 0) 155 pr_warning("Cannot read kernel map\n"); 156 } 157 158 if (tool && tool->ordering_requires_timestamps && 159 tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) { 160 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); 161 tool->ordered_events = false; 162 } 163 164 return session; 165 166 out_close: 167 perf_data_file__close(file); 168 out_delete: 169 perf_session__delete(session); 170 out: 171 return NULL; 172 } 173 174 static void perf_session__delete_threads(struct perf_session *session) 175 { 176 machine__delete_threads(&session->machines.host); 177 } 178 179 void perf_session__delete(struct perf_session *session) 180 { 181 auxtrace__free(session); 182 auxtrace_index__free(&session->auxtrace_index); 183 perf_session__destroy_kernel_maps(session); 184 perf_session__delete_threads(session); 185 perf_env__exit(&session->header.env); 186 machines__exit(&session->machines); 187 if (session->file) 188 perf_data_file__close(session->file); 189 free(session); 190 } 191 192 static int process_event_synth_tracing_data_stub(struct perf_tool *tool 193 __maybe_unused, 194 union perf_event *event 195 __maybe_unused, 196 struct perf_session *session 197 __maybe_unused) 198 { 199 dump_printf(": unhandled!\n"); 200 return 0; 201 } 202 203 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused, 204 union perf_event *event __maybe_unused, 205 struct perf_evlist **pevlist 206 __maybe_unused) 207 { 208 dump_printf(": unhandled!\n"); 209 return 0; 210 } 211 212 static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused, 213 union perf_event *event __maybe_unused, 214 struct perf_evlist **pevlist 215 __maybe_unused) 216 { 217 if (dump_trace) 218 perf_event__fprintf_event_update(event, stdout); 219 220 dump_printf(": unhandled!\n"); 221 return 0; 222 } 223 224 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused, 225 union perf_event *event __maybe_unused, 226 struct perf_sample *sample __maybe_unused, 227 struct perf_evsel *evsel __maybe_unused, 228 struct machine *machine __maybe_unused) 229 { 230 dump_printf(": unhandled!\n"); 231 return 0; 232 } 233 234 static int process_event_stub(struct perf_tool *tool __maybe_unused, 235 union perf_event *event __maybe_unused, 236 struct perf_sample *sample __maybe_unused, 237 struct machine *machine __maybe_unused) 238 { 239 dump_printf(": unhandled!\n"); 240 return 0; 241 } 242 243 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused, 244 union perf_event *event __maybe_unused, 245 struct ordered_events *oe __maybe_unused) 246 { 247 dump_printf(": unhandled!\n"); 248 return 0; 249 } 250 251 static int process_finished_round(struct perf_tool *tool, 252 union perf_event *event, 253 struct ordered_events *oe); 254 255 static int skipn(int fd, off_t n) 256 { 257 char buf[4096]; 258 ssize_t ret; 259 260 while (n > 0) { 261 ret = read(fd, buf, min(n, (off_t)sizeof(buf))); 262 if (ret <= 0) 263 return ret; 264 n -= ret; 265 } 266 267 return 0; 268 } 269 270 static s64 process_event_auxtrace_stub(struct perf_tool *tool __maybe_unused, 271 union perf_event *event, 272 struct perf_session *session 273 __maybe_unused) 274 { 275 dump_printf(": unhandled!\n"); 276 if (perf_data_file__is_pipe(session->file)) 277 skipn(perf_data_file__fd(session->file), event->auxtrace.size); 278 return event->auxtrace.size; 279 } 280 281 static int process_event_op2_stub(struct perf_tool *tool __maybe_unused, 282 union perf_event *event __maybe_unused, 283 struct perf_session *session __maybe_unused) 284 { 285 dump_printf(": unhandled!\n"); 286 return 0; 287 } 288 289 290 static 291 int process_event_thread_map_stub(struct perf_tool *tool __maybe_unused, 292 union perf_event *event __maybe_unused, 293 struct perf_session *session __maybe_unused) 294 { 295 if (dump_trace) 296 perf_event__fprintf_thread_map(event, stdout); 297 298 dump_printf(": unhandled!\n"); 299 return 0; 300 } 301 302 static 303 int process_event_cpu_map_stub(struct perf_tool *tool __maybe_unused, 304 union perf_event *event __maybe_unused, 305 struct perf_session *session __maybe_unused) 306 { 307 if (dump_trace) 308 perf_event__fprintf_cpu_map(event, stdout); 309 310 dump_printf(": unhandled!\n"); 311 return 0; 312 } 313 314 static 315 int process_event_stat_config_stub(struct perf_tool *tool __maybe_unused, 316 union perf_event *event __maybe_unused, 317 struct perf_session *session __maybe_unused) 318 { 319 if (dump_trace) 320 perf_event__fprintf_stat_config(event, stdout); 321 322 dump_printf(": unhandled!\n"); 323 return 0; 324 } 325 326 static int process_stat_stub(struct perf_tool *tool __maybe_unused, 327 union perf_event *event __maybe_unused, 328 struct perf_session *perf_session 329 __maybe_unused) 330 { 331 if (dump_trace) 332 perf_event__fprintf_stat(event, stdout); 333 334 dump_printf(": unhandled!\n"); 335 return 0; 336 } 337 338 static int process_stat_round_stub(struct perf_tool *tool __maybe_unused, 339 union perf_event *event __maybe_unused, 340 struct perf_session *perf_session 341 __maybe_unused) 342 { 343 if (dump_trace) 344 perf_event__fprintf_stat_round(event, stdout); 345 346 dump_printf(": unhandled!\n"); 347 return 0; 348 } 349 350 void perf_tool__fill_defaults(struct perf_tool *tool) 351 { 352 if (tool->sample == NULL) 353 tool->sample = process_event_sample_stub; 354 if (tool->mmap == NULL) 355 tool->mmap = process_event_stub; 356 if (tool->mmap2 == NULL) 357 tool->mmap2 = process_event_stub; 358 if (tool->comm == NULL) 359 tool->comm = process_event_stub; 360 if (tool->fork == NULL) 361 tool->fork = process_event_stub; 362 if (tool->exit == NULL) 363 tool->exit = process_event_stub; 364 if (tool->lost == NULL) 365 tool->lost = perf_event__process_lost; 366 if (tool->lost_samples == NULL) 367 tool->lost_samples = perf_event__process_lost_samples; 368 if (tool->aux == NULL) 369 tool->aux = perf_event__process_aux; 370 if (tool->itrace_start == NULL) 371 tool->itrace_start = perf_event__process_itrace_start; 372 if (tool->context_switch == NULL) 373 tool->context_switch = perf_event__process_switch; 374 if (tool->read == NULL) 375 tool->read = process_event_sample_stub; 376 if (tool->throttle == NULL) 377 tool->throttle = process_event_stub; 378 if (tool->unthrottle == NULL) 379 tool->unthrottle = process_event_stub; 380 if (tool->attr == NULL) 381 tool->attr = process_event_synth_attr_stub; 382 if (tool->event_update == NULL) 383 tool->event_update = process_event_synth_event_update_stub; 384 if (tool->tracing_data == NULL) 385 tool->tracing_data = process_event_synth_tracing_data_stub; 386 if (tool->build_id == NULL) 387 tool->build_id = process_event_op2_stub; 388 if (tool->finished_round == NULL) { 389 if (tool->ordered_events) 390 tool->finished_round = process_finished_round; 391 else 392 tool->finished_round = process_finished_round_stub; 393 } 394 if (tool->id_index == NULL) 395 tool->id_index = process_event_op2_stub; 396 if (tool->auxtrace_info == NULL) 397 tool->auxtrace_info = process_event_op2_stub; 398 if (tool->auxtrace == NULL) 399 tool->auxtrace = process_event_auxtrace_stub; 400 if (tool->auxtrace_error == NULL) 401 tool->auxtrace_error = process_event_op2_stub; 402 if (tool->thread_map == NULL) 403 tool->thread_map = process_event_thread_map_stub; 404 if (tool->cpu_map == NULL) 405 tool->cpu_map = process_event_cpu_map_stub; 406 if (tool->stat_config == NULL) 407 tool->stat_config = process_event_stat_config_stub; 408 if (tool->stat == NULL) 409 tool->stat = process_stat_stub; 410 if (tool->stat_round == NULL) 411 tool->stat_round = process_stat_round_stub; 412 } 413 414 static void swap_sample_id_all(union perf_event *event, void *data) 415 { 416 void *end = (void *) event + event->header.size; 417 int size = end - data; 418 419 BUG_ON(size % sizeof(u64)); 420 mem_bswap_64(data, size); 421 } 422 423 static void perf_event__all64_swap(union perf_event *event, 424 bool sample_id_all __maybe_unused) 425 { 426 struct perf_event_header *hdr = &event->header; 427 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 428 } 429 430 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 431 { 432 event->comm.pid = bswap_32(event->comm.pid); 433 event->comm.tid = bswap_32(event->comm.tid); 434 435 if (sample_id_all) { 436 void *data = &event->comm.comm; 437 438 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 439 swap_sample_id_all(event, data); 440 } 441 } 442 443 static void perf_event__mmap_swap(union perf_event *event, 444 bool sample_id_all) 445 { 446 event->mmap.pid = bswap_32(event->mmap.pid); 447 event->mmap.tid = bswap_32(event->mmap.tid); 448 event->mmap.start = bswap_64(event->mmap.start); 449 event->mmap.len = bswap_64(event->mmap.len); 450 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 451 452 if (sample_id_all) { 453 void *data = &event->mmap.filename; 454 455 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 456 swap_sample_id_all(event, data); 457 } 458 } 459 460 static void perf_event__mmap2_swap(union perf_event *event, 461 bool sample_id_all) 462 { 463 event->mmap2.pid = bswap_32(event->mmap2.pid); 464 event->mmap2.tid = bswap_32(event->mmap2.tid); 465 event->mmap2.start = bswap_64(event->mmap2.start); 466 event->mmap2.len = bswap_64(event->mmap2.len); 467 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); 468 event->mmap2.maj = bswap_32(event->mmap2.maj); 469 event->mmap2.min = bswap_32(event->mmap2.min); 470 event->mmap2.ino = bswap_64(event->mmap2.ino); 471 472 if (sample_id_all) { 473 void *data = &event->mmap2.filename; 474 475 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 476 swap_sample_id_all(event, data); 477 } 478 } 479 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 480 { 481 event->fork.pid = bswap_32(event->fork.pid); 482 event->fork.tid = bswap_32(event->fork.tid); 483 event->fork.ppid = bswap_32(event->fork.ppid); 484 event->fork.ptid = bswap_32(event->fork.ptid); 485 event->fork.time = bswap_64(event->fork.time); 486 487 if (sample_id_all) 488 swap_sample_id_all(event, &event->fork + 1); 489 } 490 491 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 492 { 493 event->read.pid = bswap_32(event->read.pid); 494 event->read.tid = bswap_32(event->read.tid); 495 event->read.value = bswap_64(event->read.value); 496 event->read.time_enabled = bswap_64(event->read.time_enabled); 497 event->read.time_running = bswap_64(event->read.time_running); 498 event->read.id = bswap_64(event->read.id); 499 500 if (sample_id_all) 501 swap_sample_id_all(event, &event->read + 1); 502 } 503 504 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all) 505 { 506 event->aux.aux_offset = bswap_64(event->aux.aux_offset); 507 event->aux.aux_size = bswap_64(event->aux.aux_size); 508 event->aux.flags = bswap_64(event->aux.flags); 509 510 if (sample_id_all) 511 swap_sample_id_all(event, &event->aux + 1); 512 } 513 514 static void perf_event__itrace_start_swap(union perf_event *event, 515 bool sample_id_all) 516 { 517 event->itrace_start.pid = bswap_32(event->itrace_start.pid); 518 event->itrace_start.tid = bswap_32(event->itrace_start.tid); 519 520 if (sample_id_all) 521 swap_sample_id_all(event, &event->itrace_start + 1); 522 } 523 524 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all) 525 { 526 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) { 527 event->context_switch.next_prev_pid = 528 bswap_32(event->context_switch.next_prev_pid); 529 event->context_switch.next_prev_tid = 530 bswap_32(event->context_switch.next_prev_tid); 531 } 532 533 if (sample_id_all) 534 swap_sample_id_all(event, &event->context_switch + 1); 535 } 536 537 static void perf_event__throttle_swap(union perf_event *event, 538 bool sample_id_all) 539 { 540 event->throttle.time = bswap_64(event->throttle.time); 541 event->throttle.id = bswap_64(event->throttle.id); 542 event->throttle.stream_id = bswap_64(event->throttle.stream_id); 543 544 if (sample_id_all) 545 swap_sample_id_all(event, &event->throttle + 1); 546 } 547 548 static u8 revbyte(u8 b) 549 { 550 int rev = (b >> 4) | ((b & 0xf) << 4); 551 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 552 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 553 return (u8) rev; 554 } 555 556 /* 557 * XXX this is hack in attempt to carry flags bitfield 558 * throught endian village. ABI says: 559 * 560 * Bit-fields are allocated from right to left (least to most significant) 561 * on little-endian implementations and from left to right (most to least 562 * significant) on big-endian implementations. 563 * 564 * The above seems to be byte specific, so we need to reverse each 565 * byte of the bitfield. 'Internet' also says this might be implementation 566 * specific and we probably need proper fix and carry perf_event_attr 567 * bitfield flags in separate data file FEAT_ section. Thought this seems 568 * to work for now. 569 */ 570 static void swap_bitfield(u8 *p, unsigned len) 571 { 572 unsigned i; 573 574 for (i = 0; i < len; i++) { 575 *p = revbyte(*p); 576 p++; 577 } 578 } 579 580 /* exported for swapping attributes in file header */ 581 void perf_event__attr_swap(struct perf_event_attr *attr) 582 { 583 attr->type = bswap_32(attr->type); 584 attr->size = bswap_32(attr->size); 585 586 #define bswap_safe(f, n) \ 587 (attr->size > (offsetof(struct perf_event_attr, f) + \ 588 sizeof(attr->f) * (n))) 589 #define bswap_field(f, sz) \ 590 do { \ 591 if (bswap_safe(f, 0)) \ 592 attr->f = bswap_##sz(attr->f); \ 593 } while(0) 594 #define bswap_field_32(f) bswap_field(f, 32) 595 #define bswap_field_64(f) bswap_field(f, 64) 596 597 bswap_field_64(config); 598 bswap_field_64(sample_period); 599 bswap_field_64(sample_type); 600 bswap_field_64(read_format); 601 bswap_field_32(wakeup_events); 602 bswap_field_32(bp_type); 603 bswap_field_64(bp_addr); 604 bswap_field_64(bp_len); 605 bswap_field_64(branch_sample_type); 606 bswap_field_64(sample_regs_user); 607 bswap_field_32(sample_stack_user); 608 bswap_field_32(aux_watermark); 609 610 /* 611 * After read_format are bitfields. Check read_format because 612 * we are unable to use offsetof on bitfield. 613 */ 614 if (bswap_safe(read_format, 1)) 615 swap_bitfield((u8 *) (&attr->read_format + 1), 616 sizeof(u64)); 617 #undef bswap_field_64 618 #undef bswap_field_32 619 #undef bswap_field 620 #undef bswap_safe 621 } 622 623 static void perf_event__hdr_attr_swap(union perf_event *event, 624 bool sample_id_all __maybe_unused) 625 { 626 size_t size; 627 628 perf_event__attr_swap(&event->attr.attr); 629 630 size = event->header.size; 631 size -= (void *)&event->attr.id - (void *)event; 632 mem_bswap_64(event->attr.id, size); 633 } 634 635 static void perf_event__event_update_swap(union perf_event *event, 636 bool sample_id_all __maybe_unused) 637 { 638 event->event_update.type = bswap_64(event->event_update.type); 639 event->event_update.id = bswap_64(event->event_update.id); 640 } 641 642 static void perf_event__event_type_swap(union perf_event *event, 643 bool sample_id_all __maybe_unused) 644 { 645 event->event_type.event_type.event_id = 646 bswap_64(event->event_type.event_type.event_id); 647 } 648 649 static void perf_event__tracing_data_swap(union perf_event *event, 650 bool sample_id_all __maybe_unused) 651 { 652 event->tracing_data.size = bswap_32(event->tracing_data.size); 653 } 654 655 static void perf_event__auxtrace_info_swap(union perf_event *event, 656 bool sample_id_all __maybe_unused) 657 { 658 size_t size; 659 660 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type); 661 662 size = event->header.size; 663 size -= (void *)&event->auxtrace_info.priv - (void *)event; 664 mem_bswap_64(event->auxtrace_info.priv, size); 665 } 666 667 static void perf_event__auxtrace_swap(union perf_event *event, 668 bool sample_id_all __maybe_unused) 669 { 670 event->auxtrace.size = bswap_64(event->auxtrace.size); 671 event->auxtrace.offset = bswap_64(event->auxtrace.offset); 672 event->auxtrace.reference = bswap_64(event->auxtrace.reference); 673 event->auxtrace.idx = bswap_32(event->auxtrace.idx); 674 event->auxtrace.tid = bswap_32(event->auxtrace.tid); 675 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu); 676 } 677 678 static void perf_event__auxtrace_error_swap(union perf_event *event, 679 bool sample_id_all __maybe_unused) 680 { 681 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type); 682 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code); 683 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu); 684 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid); 685 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid); 686 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip); 687 } 688 689 static void perf_event__thread_map_swap(union perf_event *event, 690 bool sample_id_all __maybe_unused) 691 { 692 unsigned i; 693 694 event->thread_map.nr = bswap_64(event->thread_map.nr); 695 696 for (i = 0; i < event->thread_map.nr; i++) 697 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid); 698 } 699 700 static void perf_event__cpu_map_swap(union perf_event *event, 701 bool sample_id_all __maybe_unused) 702 { 703 struct cpu_map_data *data = &event->cpu_map.data; 704 struct cpu_map_entries *cpus; 705 struct cpu_map_mask *mask; 706 unsigned i; 707 708 data->type = bswap_64(data->type); 709 710 switch (data->type) { 711 case PERF_CPU_MAP__CPUS: 712 cpus = (struct cpu_map_entries *)data->data; 713 714 cpus->nr = bswap_16(cpus->nr); 715 716 for (i = 0; i < cpus->nr; i++) 717 cpus->cpu[i] = bswap_16(cpus->cpu[i]); 718 break; 719 case PERF_CPU_MAP__MASK: 720 mask = (struct cpu_map_mask *) data->data; 721 722 mask->nr = bswap_16(mask->nr); 723 mask->long_size = bswap_16(mask->long_size); 724 725 switch (mask->long_size) { 726 case 4: mem_bswap_32(&mask->mask, mask->nr); break; 727 case 8: mem_bswap_64(&mask->mask, mask->nr); break; 728 default: 729 pr_err("cpu_map swap: unsupported long size\n"); 730 } 731 default: 732 break; 733 } 734 } 735 736 static void perf_event__stat_config_swap(union perf_event *event, 737 bool sample_id_all __maybe_unused) 738 { 739 u64 size; 740 741 size = event->stat_config.nr * sizeof(event->stat_config.data[0]); 742 size += 1; /* nr item itself */ 743 mem_bswap_64(&event->stat_config.nr, size); 744 } 745 746 static void perf_event__stat_swap(union perf_event *event, 747 bool sample_id_all __maybe_unused) 748 { 749 event->stat.id = bswap_64(event->stat.id); 750 event->stat.thread = bswap_32(event->stat.thread); 751 event->stat.cpu = bswap_32(event->stat.cpu); 752 event->stat.val = bswap_64(event->stat.val); 753 event->stat.ena = bswap_64(event->stat.ena); 754 event->stat.run = bswap_64(event->stat.run); 755 } 756 757 static void perf_event__stat_round_swap(union perf_event *event, 758 bool sample_id_all __maybe_unused) 759 { 760 event->stat_round.type = bswap_64(event->stat_round.type); 761 event->stat_round.time = bswap_64(event->stat_round.time); 762 } 763 764 typedef void (*perf_event__swap_op)(union perf_event *event, 765 bool sample_id_all); 766 767 static perf_event__swap_op perf_event__swap_ops[] = { 768 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 769 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap, 770 [PERF_RECORD_COMM] = perf_event__comm_swap, 771 [PERF_RECORD_FORK] = perf_event__task_swap, 772 [PERF_RECORD_EXIT] = perf_event__task_swap, 773 [PERF_RECORD_LOST] = perf_event__all64_swap, 774 [PERF_RECORD_READ] = perf_event__read_swap, 775 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap, 776 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap, 777 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 778 [PERF_RECORD_AUX] = perf_event__aux_swap, 779 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap, 780 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap, 781 [PERF_RECORD_SWITCH] = perf_event__switch_swap, 782 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap, 783 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 784 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 785 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 786 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 787 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap, 788 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap, 789 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap, 790 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap, 791 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap, 792 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap, 793 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap, 794 [PERF_RECORD_STAT] = perf_event__stat_swap, 795 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap, 796 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap, 797 [PERF_RECORD_HEADER_MAX] = NULL, 798 }; 799 800 /* 801 * When perf record finishes a pass on every buffers, it records this pseudo 802 * event. 803 * We record the max timestamp t found in the pass n. 804 * Assuming these timestamps are monotonic across cpus, we know that if 805 * a buffer still has events with timestamps below t, they will be all 806 * available and then read in the pass n + 1. 807 * Hence when we start to read the pass n + 2, we can safely flush every 808 * events with timestamps below t. 809 * 810 * ============ PASS n ================= 811 * CPU 0 | CPU 1 812 * | 813 * cnt1 timestamps | cnt2 timestamps 814 * 1 | 2 815 * 2 | 3 816 * - | 4 <--- max recorded 817 * 818 * ============ PASS n + 1 ============== 819 * CPU 0 | CPU 1 820 * | 821 * cnt1 timestamps | cnt2 timestamps 822 * 3 | 5 823 * 4 | 6 824 * 5 | 7 <---- max recorded 825 * 826 * Flush every events below timestamp 4 827 * 828 * ============ PASS n + 2 ============== 829 * CPU 0 | CPU 1 830 * | 831 * cnt1 timestamps | cnt2 timestamps 832 * 6 | 8 833 * 7 | 9 834 * - | 10 835 * 836 * Flush every events below timestamp 7 837 * etc... 838 */ 839 static int process_finished_round(struct perf_tool *tool __maybe_unused, 840 union perf_event *event __maybe_unused, 841 struct ordered_events *oe) 842 { 843 if (dump_trace) 844 fprintf(stdout, "\n"); 845 return ordered_events__flush(oe, OE_FLUSH__ROUND); 846 } 847 848 int perf_session__queue_event(struct perf_session *s, union perf_event *event, 849 struct perf_sample *sample, u64 file_offset) 850 { 851 return ordered_events__queue(&s->ordered_events, event, sample, file_offset); 852 } 853 854 static void callchain__lbr_callstack_printf(struct perf_sample *sample) 855 { 856 struct ip_callchain *callchain = sample->callchain; 857 struct branch_stack *lbr_stack = sample->branch_stack; 858 u64 kernel_callchain_nr = callchain->nr; 859 unsigned int i; 860 861 for (i = 0; i < kernel_callchain_nr; i++) { 862 if (callchain->ips[i] == PERF_CONTEXT_USER) 863 break; 864 } 865 866 if ((i != kernel_callchain_nr) && lbr_stack->nr) { 867 u64 total_nr; 868 /* 869 * LBR callstack can only get user call chain, 870 * i is kernel call chain number, 871 * 1 is PERF_CONTEXT_USER. 872 * 873 * The user call chain is stored in LBR registers. 874 * LBR are pair registers. The caller is stored 875 * in "from" register, while the callee is stored 876 * in "to" register. 877 * For example, there is a call stack 878 * "A"->"B"->"C"->"D". 879 * The LBR registers will recorde like 880 * "C"->"D", "B"->"C", "A"->"B". 881 * So only the first "to" register and all "from" 882 * registers are needed to construct the whole stack. 883 */ 884 total_nr = i + 1 + lbr_stack->nr + 1; 885 kernel_callchain_nr = i + 1; 886 887 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr); 888 889 for (i = 0; i < kernel_callchain_nr; i++) 890 printf("..... %2d: %016" PRIx64 "\n", 891 i, callchain->ips[i]); 892 893 printf("..... %2d: %016" PRIx64 "\n", 894 (int)(kernel_callchain_nr), lbr_stack->entries[0].to); 895 for (i = 0; i < lbr_stack->nr; i++) 896 printf("..... %2d: %016" PRIx64 "\n", 897 (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from); 898 } 899 } 900 901 static void callchain__printf(struct perf_evsel *evsel, 902 struct perf_sample *sample) 903 { 904 unsigned int i; 905 struct ip_callchain *callchain = sample->callchain; 906 907 if (has_branch_callstack(evsel)) 908 callchain__lbr_callstack_printf(sample); 909 910 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr); 911 912 for (i = 0; i < callchain->nr; i++) 913 printf("..... %2d: %016" PRIx64 "\n", 914 i, callchain->ips[i]); 915 } 916 917 static void branch_stack__printf(struct perf_sample *sample) 918 { 919 uint64_t i; 920 921 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr); 922 923 for (i = 0; i < sample->branch_stack->nr; i++) { 924 struct branch_entry *e = &sample->branch_stack->entries[i]; 925 926 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n", 927 i, e->from, e->to, 928 e->flags.cycles, 929 e->flags.mispred ? "M" : " ", 930 e->flags.predicted ? "P" : " ", 931 e->flags.abort ? "A" : " ", 932 e->flags.in_tx ? "T" : " ", 933 (unsigned)e->flags.reserved); 934 } 935 } 936 937 static void regs_dump__printf(u64 mask, u64 *regs) 938 { 939 unsigned rid, i = 0; 940 941 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { 942 u64 val = regs[i++]; 943 944 printf(".... %-5s 0x%" PRIx64 "\n", 945 perf_reg_name(rid), val); 946 } 947 } 948 949 static const char *regs_abi[] = { 950 [PERF_SAMPLE_REGS_ABI_NONE] = "none", 951 [PERF_SAMPLE_REGS_ABI_32] = "32-bit", 952 [PERF_SAMPLE_REGS_ABI_64] = "64-bit", 953 }; 954 955 static inline const char *regs_dump_abi(struct regs_dump *d) 956 { 957 if (d->abi > PERF_SAMPLE_REGS_ABI_64) 958 return "unknown"; 959 960 return regs_abi[d->abi]; 961 } 962 963 static void regs__printf(const char *type, struct regs_dump *regs) 964 { 965 u64 mask = regs->mask; 966 967 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n", 968 type, 969 mask, 970 regs_dump_abi(regs)); 971 972 regs_dump__printf(mask, regs->regs); 973 } 974 975 static void regs_user__printf(struct perf_sample *sample) 976 { 977 struct regs_dump *user_regs = &sample->user_regs; 978 979 if (user_regs->regs) 980 regs__printf("user", user_regs); 981 } 982 983 static void regs_intr__printf(struct perf_sample *sample) 984 { 985 struct regs_dump *intr_regs = &sample->intr_regs; 986 987 if (intr_regs->regs) 988 regs__printf("intr", intr_regs); 989 } 990 991 static void stack_user__printf(struct stack_dump *dump) 992 { 993 printf("... ustack: size %" PRIu64 ", offset 0x%x\n", 994 dump->size, dump->offset); 995 } 996 997 static void perf_evlist__print_tstamp(struct perf_evlist *evlist, 998 union perf_event *event, 999 struct perf_sample *sample) 1000 { 1001 u64 sample_type = __perf_evlist__combined_sample_type(evlist); 1002 1003 if (event->header.type != PERF_RECORD_SAMPLE && 1004 !perf_evlist__sample_id_all(evlist)) { 1005 fputs("-1 -1 ", stdout); 1006 return; 1007 } 1008 1009 if ((sample_type & PERF_SAMPLE_CPU)) 1010 printf("%u ", sample->cpu); 1011 1012 if (sample_type & PERF_SAMPLE_TIME) 1013 printf("%" PRIu64 " ", sample->time); 1014 } 1015 1016 static void sample_read__printf(struct perf_sample *sample, u64 read_format) 1017 { 1018 printf("... sample_read:\n"); 1019 1020 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1021 printf("...... time enabled %016" PRIx64 "\n", 1022 sample->read.time_enabled); 1023 1024 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1025 printf("...... time running %016" PRIx64 "\n", 1026 sample->read.time_running); 1027 1028 if (read_format & PERF_FORMAT_GROUP) { 1029 u64 i; 1030 1031 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr); 1032 1033 for (i = 0; i < sample->read.group.nr; i++) { 1034 struct sample_read_value *value; 1035 1036 value = &sample->read.group.values[i]; 1037 printf("..... id %016" PRIx64 1038 ", value %016" PRIx64 "\n", 1039 value->id, value->value); 1040 } 1041 } else 1042 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n", 1043 sample->read.one.id, sample->read.one.value); 1044 } 1045 1046 static void dump_event(struct perf_evlist *evlist, union perf_event *event, 1047 u64 file_offset, struct perf_sample *sample) 1048 { 1049 if (!dump_trace) 1050 return; 1051 1052 printf("\n%#" PRIx64 " [%#x]: event: %d\n", 1053 file_offset, event->header.size, event->header.type); 1054 1055 trace_event(event); 1056 1057 if (sample) 1058 perf_evlist__print_tstamp(evlist, event, sample); 1059 1060 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 1061 event->header.size, perf_event__name(event->header.type)); 1062 } 1063 1064 static void dump_sample(struct perf_evsel *evsel, union perf_event *event, 1065 struct perf_sample *sample) 1066 { 1067 u64 sample_type; 1068 1069 if (!dump_trace) 1070 return; 1071 1072 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 1073 event->header.misc, sample->pid, sample->tid, sample->ip, 1074 sample->period, sample->addr); 1075 1076 sample_type = evsel->attr.sample_type; 1077 1078 if (sample_type & PERF_SAMPLE_CALLCHAIN) 1079 callchain__printf(evsel, sample); 1080 1081 if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !has_branch_callstack(evsel)) 1082 branch_stack__printf(sample); 1083 1084 if (sample_type & PERF_SAMPLE_REGS_USER) 1085 regs_user__printf(sample); 1086 1087 if (sample_type & PERF_SAMPLE_REGS_INTR) 1088 regs_intr__printf(sample); 1089 1090 if (sample_type & PERF_SAMPLE_STACK_USER) 1091 stack_user__printf(&sample->user_stack); 1092 1093 if (sample_type & PERF_SAMPLE_WEIGHT) 1094 printf("... weight: %" PRIu64 "\n", sample->weight); 1095 1096 if (sample_type & PERF_SAMPLE_DATA_SRC) 1097 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src); 1098 1099 if (sample_type & PERF_SAMPLE_TRANSACTION) 1100 printf("... transaction: %" PRIx64 "\n", sample->transaction); 1101 1102 if (sample_type & PERF_SAMPLE_READ) 1103 sample_read__printf(sample, evsel->attr.read_format); 1104 } 1105 1106 static struct machine *machines__find_for_cpumode(struct machines *machines, 1107 union perf_event *event, 1108 struct perf_sample *sample) 1109 { 1110 const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 1111 struct machine *machine; 1112 1113 if (perf_guest && 1114 ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 1115 (cpumode == PERF_RECORD_MISC_GUEST_USER))) { 1116 u32 pid; 1117 1118 if (event->header.type == PERF_RECORD_MMAP 1119 || event->header.type == PERF_RECORD_MMAP2) 1120 pid = event->mmap.pid; 1121 else 1122 pid = sample->pid; 1123 1124 machine = machines__find(machines, pid); 1125 if (!machine) 1126 machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID); 1127 return machine; 1128 } 1129 1130 return &machines->host; 1131 } 1132 1133 static int deliver_sample_value(struct perf_evlist *evlist, 1134 struct perf_tool *tool, 1135 union perf_event *event, 1136 struct perf_sample *sample, 1137 struct sample_read_value *v, 1138 struct machine *machine) 1139 { 1140 struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id); 1141 1142 if (sid) { 1143 sample->id = v->id; 1144 sample->period = v->value - sid->period; 1145 sid->period = v->value; 1146 } 1147 1148 if (!sid || sid->evsel == NULL) { 1149 ++evlist->stats.nr_unknown_id; 1150 return 0; 1151 } 1152 1153 return tool->sample(tool, event, sample, sid->evsel, machine); 1154 } 1155 1156 static int deliver_sample_group(struct perf_evlist *evlist, 1157 struct perf_tool *tool, 1158 union perf_event *event, 1159 struct perf_sample *sample, 1160 struct machine *machine) 1161 { 1162 int ret = -EINVAL; 1163 u64 i; 1164 1165 for (i = 0; i < sample->read.group.nr; i++) { 1166 ret = deliver_sample_value(evlist, tool, event, sample, 1167 &sample->read.group.values[i], 1168 machine); 1169 if (ret) 1170 break; 1171 } 1172 1173 return ret; 1174 } 1175 1176 static int 1177 perf_evlist__deliver_sample(struct perf_evlist *evlist, 1178 struct perf_tool *tool, 1179 union perf_event *event, 1180 struct perf_sample *sample, 1181 struct perf_evsel *evsel, 1182 struct machine *machine) 1183 { 1184 /* We know evsel != NULL. */ 1185 u64 sample_type = evsel->attr.sample_type; 1186 u64 read_format = evsel->attr.read_format; 1187 1188 /* Standard sample delievery. */ 1189 if (!(sample_type & PERF_SAMPLE_READ)) 1190 return tool->sample(tool, event, sample, evsel, machine); 1191 1192 /* For PERF_SAMPLE_READ we have either single or group mode. */ 1193 if (read_format & PERF_FORMAT_GROUP) 1194 return deliver_sample_group(evlist, tool, event, sample, 1195 machine); 1196 else 1197 return deliver_sample_value(evlist, tool, event, sample, 1198 &sample->read.one, machine); 1199 } 1200 1201 static int machines__deliver_event(struct machines *machines, 1202 struct perf_evlist *evlist, 1203 union perf_event *event, 1204 struct perf_sample *sample, 1205 struct perf_tool *tool, u64 file_offset) 1206 { 1207 struct perf_evsel *evsel; 1208 struct machine *machine; 1209 1210 dump_event(evlist, event, file_offset, sample); 1211 1212 evsel = perf_evlist__id2evsel(evlist, sample->id); 1213 1214 machine = machines__find_for_cpumode(machines, event, sample); 1215 1216 switch (event->header.type) { 1217 case PERF_RECORD_SAMPLE: 1218 if (evsel == NULL) { 1219 ++evlist->stats.nr_unknown_id; 1220 return 0; 1221 } 1222 dump_sample(evsel, event, sample); 1223 if (machine == NULL) { 1224 ++evlist->stats.nr_unprocessable_samples; 1225 return 0; 1226 } 1227 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine); 1228 case PERF_RECORD_MMAP: 1229 return tool->mmap(tool, event, sample, machine); 1230 case PERF_RECORD_MMAP2: 1231 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT) 1232 ++evlist->stats.nr_proc_map_timeout; 1233 return tool->mmap2(tool, event, sample, machine); 1234 case PERF_RECORD_COMM: 1235 return tool->comm(tool, event, sample, machine); 1236 case PERF_RECORD_FORK: 1237 return tool->fork(tool, event, sample, machine); 1238 case PERF_RECORD_EXIT: 1239 return tool->exit(tool, event, sample, machine); 1240 case PERF_RECORD_LOST: 1241 if (tool->lost == perf_event__process_lost) 1242 evlist->stats.total_lost += event->lost.lost; 1243 return tool->lost(tool, event, sample, machine); 1244 case PERF_RECORD_LOST_SAMPLES: 1245 if (tool->lost_samples == perf_event__process_lost_samples) 1246 evlist->stats.total_lost_samples += event->lost_samples.lost; 1247 return tool->lost_samples(tool, event, sample, machine); 1248 case PERF_RECORD_READ: 1249 return tool->read(tool, event, sample, evsel, machine); 1250 case PERF_RECORD_THROTTLE: 1251 return tool->throttle(tool, event, sample, machine); 1252 case PERF_RECORD_UNTHROTTLE: 1253 return tool->unthrottle(tool, event, sample, machine); 1254 case PERF_RECORD_AUX: 1255 if (tool->aux == perf_event__process_aux && 1256 (event->aux.flags & PERF_AUX_FLAG_TRUNCATED)) 1257 evlist->stats.total_aux_lost += 1; 1258 return tool->aux(tool, event, sample, machine); 1259 case PERF_RECORD_ITRACE_START: 1260 return tool->itrace_start(tool, event, sample, machine); 1261 case PERF_RECORD_SWITCH: 1262 case PERF_RECORD_SWITCH_CPU_WIDE: 1263 return tool->context_switch(tool, event, sample, machine); 1264 default: 1265 ++evlist->stats.nr_unknown_events; 1266 return -1; 1267 } 1268 } 1269 1270 static int perf_session__deliver_event(struct perf_session *session, 1271 union perf_event *event, 1272 struct perf_sample *sample, 1273 struct perf_tool *tool, 1274 u64 file_offset) 1275 { 1276 int ret; 1277 1278 ret = auxtrace__process_event(session, event, sample, tool); 1279 if (ret < 0) 1280 return ret; 1281 if (ret > 0) 1282 return 0; 1283 1284 return machines__deliver_event(&session->machines, session->evlist, 1285 event, sample, tool, file_offset); 1286 } 1287 1288 static s64 perf_session__process_user_event(struct perf_session *session, 1289 union perf_event *event, 1290 u64 file_offset) 1291 { 1292 struct ordered_events *oe = &session->ordered_events; 1293 struct perf_tool *tool = session->tool; 1294 int fd = perf_data_file__fd(session->file); 1295 int err; 1296 1297 dump_event(session->evlist, event, file_offset, NULL); 1298 1299 /* These events are processed right away */ 1300 switch (event->header.type) { 1301 case PERF_RECORD_HEADER_ATTR: 1302 err = tool->attr(tool, event, &session->evlist); 1303 if (err == 0) { 1304 perf_session__set_id_hdr_size(session); 1305 perf_session__set_comm_exec(session); 1306 } 1307 return err; 1308 case PERF_RECORD_EVENT_UPDATE: 1309 return tool->event_update(tool, event, &session->evlist); 1310 case PERF_RECORD_HEADER_EVENT_TYPE: 1311 /* 1312 * Depreceated, but we need to handle it for sake 1313 * of old data files create in pipe mode. 1314 */ 1315 return 0; 1316 case PERF_RECORD_HEADER_TRACING_DATA: 1317 /* setup for reading amidst mmap */ 1318 lseek(fd, file_offset, SEEK_SET); 1319 return tool->tracing_data(tool, event, session); 1320 case PERF_RECORD_HEADER_BUILD_ID: 1321 return tool->build_id(tool, event, session); 1322 case PERF_RECORD_FINISHED_ROUND: 1323 return tool->finished_round(tool, event, oe); 1324 case PERF_RECORD_ID_INDEX: 1325 return tool->id_index(tool, event, session); 1326 case PERF_RECORD_AUXTRACE_INFO: 1327 return tool->auxtrace_info(tool, event, session); 1328 case PERF_RECORD_AUXTRACE: 1329 /* setup for reading amidst mmap */ 1330 lseek(fd, file_offset + event->header.size, SEEK_SET); 1331 return tool->auxtrace(tool, event, session); 1332 case PERF_RECORD_AUXTRACE_ERROR: 1333 perf_session__auxtrace_error_inc(session, event); 1334 return tool->auxtrace_error(tool, event, session); 1335 case PERF_RECORD_THREAD_MAP: 1336 return tool->thread_map(tool, event, session); 1337 case PERF_RECORD_CPU_MAP: 1338 return tool->cpu_map(tool, event, session); 1339 case PERF_RECORD_STAT_CONFIG: 1340 return tool->stat_config(tool, event, session); 1341 case PERF_RECORD_STAT: 1342 return tool->stat(tool, event, session); 1343 case PERF_RECORD_STAT_ROUND: 1344 return tool->stat_round(tool, event, session); 1345 default: 1346 return -EINVAL; 1347 } 1348 } 1349 1350 int perf_session__deliver_synth_event(struct perf_session *session, 1351 union perf_event *event, 1352 struct perf_sample *sample) 1353 { 1354 struct perf_evlist *evlist = session->evlist; 1355 struct perf_tool *tool = session->tool; 1356 1357 events_stats__inc(&evlist->stats, event->header.type); 1358 1359 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1360 return perf_session__process_user_event(session, event, 0); 1361 1362 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0); 1363 } 1364 1365 static void event_swap(union perf_event *event, bool sample_id_all) 1366 { 1367 perf_event__swap_op swap; 1368 1369 swap = perf_event__swap_ops[event->header.type]; 1370 if (swap) 1371 swap(event, sample_id_all); 1372 } 1373 1374 int perf_session__peek_event(struct perf_session *session, off_t file_offset, 1375 void *buf, size_t buf_sz, 1376 union perf_event **event_ptr, 1377 struct perf_sample *sample) 1378 { 1379 union perf_event *event; 1380 size_t hdr_sz, rest; 1381 int fd; 1382 1383 if (session->one_mmap && !session->header.needs_swap) { 1384 event = file_offset - session->one_mmap_offset + 1385 session->one_mmap_addr; 1386 goto out_parse_sample; 1387 } 1388 1389 if (perf_data_file__is_pipe(session->file)) 1390 return -1; 1391 1392 fd = perf_data_file__fd(session->file); 1393 hdr_sz = sizeof(struct perf_event_header); 1394 1395 if (buf_sz < hdr_sz) 1396 return -1; 1397 1398 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 || 1399 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz) 1400 return -1; 1401 1402 event = (union perf_event *)buf; 1403 1404 if (session->header.needs_swap) 1405 perf_event_header__bswap(&event->header); 1406 1407 if (event->header.size < hdr_sz || event->header.size > buf_sz) 1408 return -1; 1409 1410 rest = event->header.size - hdr_sz; 1411 1412 if (readn(fd, buf, rest) != (ssize_t)rest) 1413 return -1; 1414 1415 if (session->header.needs_swap) 1416 event_swap(event, perf_evlist__sample_id_all(session->evlist)); 1417 1418 out_parse_sample: 1419 1420 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START && 1421 perf_evlist__parse_sample(session->evlist, event, sample)) 1422 return -1; 1423 1424 *event_ptr = event; 1425 1426 return 0; 1427 } 1428 1429 static s64 perf_session__process_event(struct perf_session *session, 1430 union perf_event *event, u64 file_offset) 1431 { 1432 struct perf_evlist *evlist = session->evlist; 1433 struct perf_tool *tool = session->tool; 1434 struct perf_sample sample; 1435 int ret; 1436 1437 if (session->header.needs_swap) 1438 event_swap(event, perf_evlist__sample_id_all(evlist)); 1439 1440 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1441 return -EINVAL; 1442 1443 events_stats__inc(&evlist->stats, event->header.type); 1444 1445 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1446 return perf_session__process_user_event(session, event, file_offset); 1447 1448 /* 1449 * For all kernel events we get the sample data 1450 */ 1451 ret = perf_evlist__parse_sample(evlist, event, &sample); 1452 if (ret) 1453 return ret; 1454 1455 if (tool->ordered_events) { 1456 ret = perf_session__queue_event(session, event, &sample, file_offset); 1457 if (ret != -ETIME) 1458 return ret; 1459 } 1460 1461 return perf_session__deliver_event(session, event, &sample, tool, 1462 file_offset); 1463 } 1464 1465 void perf_event_header__bswap(struct perf_event_header *hdr) 1466 { 1467 hdr->type = bswap_32(hdr->type); 1468 hdr->misc = bswap_16(hdr->misc); 1469 hdr->size = bswap_16(hdr->size); 1470 } 1471 1472 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1473 { 1474 return machine__findnew_thread(&session->machines.host, -1, pid); 1475 } 1476 1477 int perf_session__register_idle_thread(struct perf_session *session) 1478 { 1479 struct thread *thread; 1480 int err = 0; 1481 1482 thread = machine__findnew_thread(&session->machines.host, 0, 0); 1483 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) { 1484 pr_err("problem inserting idle task.\n"); 1485 err = -1; 1486 } 1487 1488 /* machine__findnew_thread() got the thread, so put it */ 1489 thread__put(thread); 1490 return err; 1491 } 1492 1493 static void perf_session__warn_about_errors(const struct perf_session *session) 1494 { 1495 const struct events_stats *stats = &session->evlist->stats; 1496 const struct ordered_events *oe = &session->ordered_events; 1497 1498 if (session->tool->lost == perf_event__process_lost && 1499 stats->nr_events[PERF_RECORD_LOST] != 0) { 1500 ui__warning("Processed %d events and lost %d chunks!\n\n" 1501 "Check IO/CPU overload!\n\n", 1502 stats->nr_events[0], 1503 stats->nr_events[PERF_RECORD_LOST]); 1504 } 1505 1506 if (session->tool->lost_samples == perf_event__process_lost_samples) { 1507 double drop_rate; 1508 1509 drop_rate = (double)stats->total_lost_samples / 1510 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples); 1511 if (drop_rate > 0.05) { 1512 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%% samples!\n\n", 1513 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples, 1514 drop_rate * 100.0); 1515 } 1516 } 1517 1518 if (session->tool->aux == perf_event__process_aux && 1519 stats->total_aux_lost != 0) { 1520 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n", 1521 stats->total_aux_lost, 1522 stats->nr_events[PERF_RECORD_AUX]); 1523 } 1524 1525 if (stats->nr_unknown_events != 0) { 1526 ui__warning("Found %u unknown events!\n\n" 1527 "Is this an older tool processing a perf.data " 1528 "file generated by a more recent tool?\n\n" 1529 "If that is not the case, consider " 1530 "reporting to linux-kernel@vger.kernel.org.\n\n", 1531 stats->nr_unknown_events); 1532 } 1533 1534 if (stats->nr_unknown_id != 0) { 1535 ui__warning("%u samples with id not present in the header\n", 1536 stats->nr_unknown_id); 1537 } 1538 1539 if (stats->nr_invalid_chains != 0) { 1540 ui__warning("Found invalid callchains!\n\n" 1541 "%u out of %u events were discarded for this reason.\n\n" 1542 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1543 stats->nr_invalid_chains, 1544 stats->nr_events[PERF_RECORD_SAMPLE]); 1545 } 1546 1547 if (stats->nr_unprocessable_samples != 0) { 1548 ui__warning("%u unprocessable samples recorded.\n" 1549 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1550 stats->nr_unprocessable_samples); 1551 } 1552 1553 if (oe->nr_unordered_events != 0) 1554 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events); 1555 1556 events_stats__auxtrace_error_warn(stats); 1557 1558 if (stats->nr_proc_map_timeout != 0) { 1559 ui__warning("%d map information files for pre-existing threads were\n" 1560 "not processed, if there are samples for addresses they\n" 1561 "will not be resolved, you may find out which are these\n" 1562 "threads by running with -v and redirecting the output\n" 1563 "to a file.\n" 1564 "The time limit to process proc map is too short?\n" 1565 "Increase it by --proc-map-timeout\n", 1566 stats->nr_proc_map_timeout); 1567 } 1568 } 1569 1570 static int perf_session__flush_thread_stack(struct thread *thread, 1571 void *p __maybe_unused) 1572 { 1573 return thread_stack__flush(thread); 1574 } 1575 1576 static int perf_session__flush_thread_stacks(struct perf_session *session) 1577 { 1578 return machines__for_each_thread(&session->machines, 1579 perf_session__flush_thread_stack, 1580 NULL); 1581 } 1582 1583 volatile int session_done; 1584 1585 static int __perf_session__process_pipe_events(struct perf_session *session) 1586 { 1587 struct ordered_events *oe = &session->ordered_events; 1588 struct perf_tool *tool = session->tool; 1589 int fd = perf_data_file__fd(session->file); 1590 union perf_event *event; 1591 uint32_t size, cur_size = 0; 1592 void *buf = NULL; 1593 s64 skip = 0; 1594 u64 head; 1595 ssize_t err; 1596 void *p; 1597 1598 perf_tool__fill_defaults(tool); 1599 1600 head = 0; 1601 cur_size = sizeof(union perf_event); 1602 1603 buf = malloc(cur_size); 1604 if (!buf) 1605 return -errno; 1606 more: 1607 event = buf; 1608 err = readn(fd, event, sizeof(struct perf_event_header)); 1609 if (err <= 0) { 1610 if (err == 0) 1611 goto done; 1612 1613 pr_err("failed to read event header\n"); 1614 goto out_err; 1615 } 1616 1617 if (session->header.needs_swap) 1618 perf_event_header__bswap(&event->header); 1619 1620 size = event->header.size; 1621 if (size < sizeof(struct perf_event_header)) { 1622 pr_err("bad event header size\n"); 1623 goto out_err; 1624 } 1625 1626 if (size > cur_size) { 1627 void *new = realloc(buf, size); 1628 if (!new) { 1629 pr_err("failed to allocate memory to read event\n"); 1630 goto out_err; 1631 } 1632 buf = new; 1633 cur_size = size; 1634 event = buf; 1635 } 1636 p = event; 1637 p += sizeof(struct perf_event_header); 1638 1639 if (size - sizeof(struct perf_event_header)) { 1640 err = readn(fd, p, size - sizeof(struct perf_event_header)); 1641 if (err <= 0) { 1642 if (err == 0) { 1643 pr_err("unexpected end of event stream\n"); 1644 goto done; 1645 } 1646 1647 pr_err("failed to read event data\n"); 1648 goto out_err; 1649 } 1650 } 1651 1652 if ((skip = perf_session__process_event(session, event, head)) < 0) { 1653 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1654 head, event->header.size, event->header.type); 1655 err = -EINVAL; 1656 goto out_err; 1657 } 1658 1659 head += size; 1660 1661 if (skip > 0) 1662 head += skip; 1663 1664 if (!session_done()) 1665 goto more; 1666 done: 1667 /* do the final flush for ordered samples */ 1668 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 1669 if (err) 1670 goto out_err; 1671 err = auxtrace__flush_events(session, tool); 1672 if (err) 1673 goto out_err; 1674 err = perf_session__flush_thread_stacks(session); 1675 out_err: 1676 free(buf); 1677 perf_session__warn_about_errors(session); 1678 ordered_events__free(&session->ordered_events); 1679 auxtrace__free_events(session); 1680 return err; 1681 } 1682 1683 static union perf_event * 1684 fetch_mmaped_event(struct perf_session *session, 1685 u64 head, size_t mmap_size, char *buf) 1686 { 1687 union perf_event *event; 1688 1689 /* 1690 * Ensure we have enough space remaining to read 1691 * the size of the event in the headers. 1692 */ 1693 if (head + sizeof(event->header) > mmap_size) 1694 return NULL; 1695 1696 event = (union perf_event *)(buf + head); 1697 1698 if (session->header.needs_swap) 1699 perf_event_header__bswap(&event->header); 1700 1701 if (head + event->header.size > mmap_size) { 1702 /* We're not fetching the event so swap back again */ 1703 if (session->header.needs_swap) 1704 perf_event_header__bswap(&event->header); 1705 return NULL; 1706 } 1707 1708 return event; 1709 } 1710 1711 /* 1712 * On 64bit we can mmap the data file in one go. No need for tiny mmap 1713 * slices. On 32bit we use 32MB. 1714 */ 1715 #if BITS_PER_LONG == 64 1716 #define MMAP_SIZE ULLONG_MAX 1717 #define NUM_MMAPS 1 1718 #else 1719 #define MMAP_SIZE (32 * 1024 * 1024ULL) 1720 #define NUM_MMAPS 128 1721 #endif 1722 1723 static int __perf_session__process_events(struct perf_session *session, 1724 u64 data_offset, u64 data_size, 1725 u64 file_size) 1726 { 1727 struct ordered_events *oe = &session->ordered_events; 1728 struct perf_tool *tool = session->tool; 1729 int fd = perf_data_file__fd(session->file); 1730 u64 head, page_offset, file_offset, file_pos, size; 1731 int err, mmap_prot, mmap_flags, map_idx = 0; 1732 size_t mmap_size; 1733 char *buf, *mmaps[NUM_MMAPS]; 1734 union perf_event *event; 1735 struct ui_progress prog; 1736 s64 skip; 1737 1738 perf_tool__fill_defaults(tool); 1739 1740 page_offset = page_size * (data_offset / page_size); 1741 file_offset = page_offset; 1742 head = data_offset - page_offset; 1743 1744 if (data_size == 0) 1745 goto out; 1746 1747 if (data_offset + data_size < file_size) 1748 file_size = data_offset + data_size; 1749 1750 ui_progress__init(&prog, file_size, "Processing events..."); 1751 1752 mmap_size = MMAP_SIZE; 1753 if (mmap_size > file_size) { 1754 mmap_size = file_size; 1755 session->one_mmap = true; 1756 } 1757 1758 memset(mmaps, 0, sizeof(mmaps)); 1759 1760 mmap_prot = PROT_READ; 1761 mmap_flags = MAP_SHARED; 1762 1763 if (session->header.needs_swap) { 1764 mmap_prot |= PROT_WRITE; 1765 mmap_flags = MAP_PRIVATE; 1766 } 1767 remap: 1768 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd, 1769 file_offset); 1770 if (buf == MAP_FAILED) { 1771 pr_err("failed to mmap file\n"); 1772 err = -errno; 1773 goto out_err; 1774 } 1775 mmaps[map_idx] = buf; 1776 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 1777 file_pos = file_offset + head; 1778 if (session->one_mmap) { 1779 session->one_mmap_addr = buf; 1780 session->one_mmap_offset = file_offset; 1781 } 1782 1783 more: 1784 event = fetch_mmaped_event(session, head, mmap_size, buf); 1785 if (!event) { 1786 if (mmaps[map_idx]) { 1787 munmap(mmaps[map_idx], mmap_size); 1788 mmaps[map_idx] = NULL; 1789 } 1790 1791 page_offset = page_size * (head / page_size); 1792 file_offset += page_offset; 1793 head -= page_offset; 1794 goto remap; 1795 } 1796 1797 size = event->header.size; 1798 1799 if (size < sizeof(struct perf_event_header) || 1800 (skip = perf_session__process_event(session, event, file_pos)) < 0) { 1801 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1802 file_offset + head, event->header.size, 1803 event->header.type); 1804 err = -EINVAL; 1805 goto out_err; 1806 } 1807 1808 if (skip) 1809 size += skip; 1810 1811 head += size; 1812 file_pos += size; 1813 1814 ui_progress__update(&prog, size); 1815 1816 if (session_done()) 1817 goto out; 1818 1819 if (file_pos < file_size) 1820 goto more; 1821 1822 out: 1823 /* do the final flush for ordered samples */ 1824 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 1825 if (err) 1826 goto out_err; 1827 err = auxtrace__flush_events(session, tool); 1828 if (err) 1829 goto out_err; 1830 err = perf_session__flush_thread_stacks(session); 1831 out_err: 1832 ui_progress__finish(); 1833 perf_session__warn_about_errors(session); 1834 ordered_events__free(&session->ordered_events); 1835 auxtrace__free_events(session); 1836 session->one_mmap = false; 1837 return err; 1838 } 1839 1840 int perf_session__process_events(struct perf_session *session) 1841 { 1842 u64 size = perf_data_file__size(session->file); 1843 int err; 1844 1845 if (perf_session__register_idle_thread(session) < 0) 1846 return -ENOMEM; 1847 1848 if (!perf_data_file__is_pipe(session->file)) 1849 err = __perf_session__process_events(session, 1850 session->header.data_offset, 1851 session->header.data_size, size); 1852 else 1853 err = __perf_session__process_pipe_events(session); 1854 1855 return err; 1856 } 1857 1858 bool perf_session__has_traces(struct perf_session *session, const char *msg) 1859 { 1860 struct perf_evsel *evsel; 1861 1862 evlist__for_each(session->evlist, evsel) { 1863 if (evsel->attr.type == PERF_TYPE_TRACEPOINT) 1864 return true; 1865 } 1866 1867 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 1868 return false; 1869 } 1870 1871 int maps__set_kallsyms_ref_reloc_sym(struct map **maps, 1872 const char *symbol_name, u64 addr) 1873 { 1874 char *bracket; 1875 enum map_type i; 1876 struct ref_reloc_sym *ref; 1877 1878 ref = zalloc(sizeof(struct ref_reloc_sym)); 1879 if (ref == NULL) 1880 return -ENOMEM; 1881 1882 ref->name = strdup(symbol_name); 1883 if (ref->name == NULL) { 1884 free(ref); 1885 return -ENOMEM; 1886 } 1887 1888 bracket = strchr(ref->name, ']'); 1889 if (bracket) 1890 *bracket = '\0'; 1891 1892 ref->addr = addr; 1893 1894 for (i = 0; i < MAP__NR_TYPES; ++i) { 1895 struct kmap *kmap = map__kmap(maps[i]); 1896 1897 if (!kmap) 1898 continue; 1899 kmap->ref_reloc_sym = ref; 1900 } 1901 1902 return 0; 1903 } 1904 1905 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp) 1906 { 1907 return machines__fprintf_dsos(&session->machines, fp); 1908 } 1909 1910 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp, 1911 bool (skip)(struct dso *dso, int parm), int parm) 1912 { 1913 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm); 1914 } 1915 1916 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 1917 { 1918 size_t ret; 1919 const char *msg = ""; 1920 1921 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE)) 1922 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)"; 1923 1924 ret = fprintf(fp, "\nAggregated stats:%s\n", msg); 1925 1926 ret += events_stats__fprintf(&session->evlist->stats, fp); 1927 return ret; 1928 } 1929 1930 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 1931 { 1932 /* 1933 * FIXME: Here we have to actually print all the machines in this 1934 * session, not just the host... 1935 */ 1936 return machine__fprintf(&session->machines.host, fp); 1937 } 1938 1939 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, 1940 unsigned int type) 1941 { 1942 struct perf_evsel *pos; 1943 1944 evlist__for_each(session->evlist, pos) { 1945 if (pos->attr.type == type) 1946 return pos; 1947 } 1948 return NULL; 1949 } 1950 1951 void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample, 1952 struct addr_location *al, 1953 unsigned int print_opts, unsigned int stack_depth) 1954 { 1955 struct callchain_cursor_node *node; 1956 int print_ip = print_opts & PRINT_IP_OPT_IP; 1957 int print_sym = print_opts & PRINT_IP_OPT_SYM; 1958 int print_dso = print_opts & PRINT_IP_OPT_DSO; 1959 int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET; 1960 int print_oneline = print_opts & PRINT_IP_OPT_ONELINE; 1961 int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE; 1962 char s = print_oneline ? ' ' : '\t'; 1963 1964 if (symbol_conf.use_callchain && sample->callchain) { 1965 struct addr_location node_al; 1966 1967 if (thread__resolve_callchain(al->thread, evsel, 1968 sample, NULL, NULL, 1969 stack_depth) != 0) { 1970 if (verbose) 1971 error("Failed to resolve callchain. Skipping\n"); 1972 return; 1973 } 1974 callchain_cursor_commit(&callchain_cursor); 1975 1976 if (print_symoffset) 1977 node_al = *al; 1978 1979 while (stack_depth) { 1980 u64 addr = 0; 1981 1982 node = callchain_cursor_current(&callchain_cursor); 1983 if (!node) 1984 break; 1985 1986 if (node->sym && node->sym->ignore) 1987 goto next; 1988 1989 if (print_ip) 1990 printf("%c%16" PRIx64, s, node->ip); 1991 1992 if (node->map) 1993 addr = node->map->map_ip(node->map, node->ip); 1994 1995 if (print_sym) { 1996 printf(" "); 1997 if (print_symoffset) { 1998 node_al.addr = addr; 1999 node_al.map = node->map; 2000 symbol__fprintf_symname_offs(node->sym, &node_al, stdout); 2001 } else 2002 symbol__fprintf_symname(node->sym, stdout); 2003 } 2004 2005 if (print_dso) { 2006 printf(" ("); 2007 map__fprintf_dsoname(node->map, stdout); 2008 printf(")"); 2009 } 2010 2011 if (print_srcline) 2012 map__fprintf_srcline(node->map, addr, "\n ", 2013 stdout); 2014 2015 if (!print_oneline) 2016 printf("\n"); 2017 2018 stack_depth--; 2019 next: 2020 callchain_cursor_advance(&callchain_cursor); 2021 } 2022 2023 } else { 2024 if (al->sym && al->sym->ignore) 2025 return; 2026 2027 if (print_ip) 2028 printf("%16" PRIx64, sample->ip); 2029 2030 if (print_sym) { 2031 printf(" "); 2032 if (print_symoffset) 2033 symbol__fprintf_symname_offs(al->sym, al, 2034 stdout); 2035 else 2036 symbol__fprintf_symname(al->sym, stdout); 2037 } 2038 2039 if (print_dso) { 2040 printf(" ("); 2041 map__fprintf_dsoname(al->map, stdout); 2042 printf(")"); 2043 } 2044 2045 if (print_srcline) 2046 map__fprintf_srcline(al->map, al->addr, "\n ", stdout); 2047 } 2048 } 2049 2050 int perf_session__cpu_bitmap(struct perf_session *session, 2051 const char *cpu_list, unsigned long *cpu_bitmap) 2052 { 2053 int i, err = -1; 2054 struct cpu_map *map; 2055 2056 for (i = 0; i < PERF_TYPE_MAX; ++i) { 2057 struct perf_evsel *evsel; 2058 2059 evsel = perf_session__find_first_evtype(session, i); 2060 if (!evsel) 2061 continue; 2062 2063 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) { 2064 pr_err("File does not contain CPU events. " 2065 "Remove -c option to proceed.\n"); 2066 return -1; 2067 } 2068 } 2069 2070 map = cpu_map__new(cpu_list); 2071 if (map == NULL) { 2072 pr_err("Invalid cpu_list\n"); 2073 return -1; 2074 } 2075 2076 for (i = 0; i < map->nr; i++) { 2077 int cpu = map->map[i]; 2078 2079 if (cpu >= MAX_NR_CPUS) { 2080 pr_err("Requested CPU %d too large. " 2081 "Consider raising MAX_NR_CPUS\n", cpu); 2082 goto out_delete_map; 2083 } 2084 2085 set_bit(cpu, cpu_bitmap); 2086 } 2087 2088 err = 0; 2089 2090 out_delete_map: 2091 cpu_map__put(map); 2092 return err; 2093 } 2094 2095 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 2096 bool full) 2097 { 2098 struct stat st; 2099 int fd, ret; 2100 2101 if (session == NULL || fp == NULL) 2102 return; 2103 2104 fd = perf_data_file__fd(session->file); 2105 2106 ret = fstat(fd, &st); 2107 if (ret == -1) 2108 return; 2109 2110 fprintf(fp, "# ========\n"); 2111 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime)); 2112 perf_header__fprintf_info(session, fp, full); 2113 fprintf(fp, "# ========\n#\n"); 2114 } 2115 2116 2117 int __perf_session__set_tracepoints_handlers(struct perf_session *session, 2118 const struct perf_evsel_str_handler *assocs, 2119 size_t nr_assocs) 2120 { 2121 struct perf_evsel *evsel; 2122 size_t i; 2123 int err; 2124 2125 for (i = 0; i < nr_assocs; i++) { 2126 /* 2127 * Adding a handler for an event not in the session, 2128 * just ignore it. 2129 */ 2130 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name); 2131 if (evsel == NULL) 2132 continue; 2133 2134 err = -EEXIST; 2135 if (evsel->handler != NULL) 2136 goto out; 2137 evsel->handler = assocs[i].handler; 2138 } 2139 2140 err = 0; 2141 out: 2142 return err; 2143 } 2144 2145 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused, 2146 union perf_event *event, 2147 struct perf_session *session) 2148 { 2149 struct perf_evlist *evlist = session->evlist; 2150 struct id_index_event *ie = &event->id_index; 2151 size_t i, nr, max_nr; 2152 2153 max_nr = (ie->header.size - sizeof(struct id_index_event)) / 2154 sizeof(struct id_index_entry); 2155 nr = ie->nr; 2156 if (nr > max_nr) 2157 return -EINVAL; 2158 2159 if (dump_trace) 2160 fprintf(stdout, " nr: %zu\n", nr); 2161 2162 for (i = 0; i < nr; i++) { 2163 struct id_index_entry *e = &ie->entries[i]; 2164 struct perf_sample_id *sid; 2165 2166 if (dump_trace) { 2167 fprintf(stdout, " ... id: %"PRIu64, e->id); 2168 fprintf(stdout, " idx: %"PRIu64, e->idx); 2169 fprintf(stdout, " cpu: %"PRId64, e->cpu); 2170 fprintf(stdout, " tid: %"PRId64"\n", e->tid); 2171 } 2172 2173 sid = perf_evlist__id2sid(evlist, e->id); 2174 if (!sid) 2175 return -ENOENT; 2176 sid->idx = e->idx; 2177 sid->cpu = e->cpu; 2178 sid->tid = e->tid; 2179 } 2180 return 0; 2181 } 2182 2183 int perf_event__synthesize_id_index(struct perf_tool *tool, 2184 perf_event__handler_t process, 2185 struct perf_evlist *evlist, 2186 struct machine *machine) 2187 { 2188 union perf_event *ev; 2189 struct perf_evsel *evsel; 2190 size_t nr = 0, i = 0, sz, max_nr, n; 2191 int err; 2192 2193 pr_debug2("Synthesizing id index\n"); 2194 2195 max_nr = (UINT16_MAX - sizeof(struct id_index_event)) / 2196 sizeof(struct id_index_entry); 2197 2198 evlist__for_each(evlist, evsel) 2199 nr += evsel->ids; 2200 2201 n = nr > max_nr ? max_nr : nr; 2202 sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry); 2203 ev = zalloc(sz); 2204 if (!ev) 2205 return -ENOMEM; 2206 2207 ev->id_index.header.type = PERF_RECORD_ID_INDEX; 2208 ev->id_index.header.size = sz; 2209 ev->id_index.nr = n; 2210 2211 evlist__for_each(evlist, evsel) { 2212 u32 j; 2213 2214 for (j = 0; j < evsel->ids; j++) { 2215 struct id_index_entry *e; 2216 struct perf_sample_id *sid; 2217 2218 if (i >= n) { 2219 err = process(tool, ev, NULL, machine); 2220 if (err) 2221 goto out_err; 2222 nr -= n; 2223 i = 0; 2224 } 2225 2226 e = &ev->id_index.entries[i++]; 2227 2228 e->id = evsel->id[j]; 2229 2230 sid = perf_evlist__id2sid(evlist, e->id); 2231 if (!sid) { 2232 free(ev); 2233 return -ENOENT; 2234 } 2235 2236 e->idx = sid->idx; 2237 e->cpu = sid->cpu; 2238 e->tid = sid->tid; 2239 } 2240 } 2241 2242 sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry); 2243 ev->id_index.header.size = sz; 2244 ev->id_index.nr = nr; 2245 2246 err = process(tool, ev, NULL, machine); 2247 out_err: 2248 free(ev); 2249 2250 return err; 2251 } 2252