1 // SPDX-License-Identifier: GPL-2.0 2 #include <errno.h> 3 #include <inttypes.h> 4 #include <linux/kernel.h> 5 #include <traceevent/event-parse.h> 6 #include <api/fs/fs.h> 7 8 #include <byteswap.h> 9 #include <unistd.h> 10 #include <sys/types.h> 11 #include <sys/mman.h> 12 13 #include "evlist.h" 14 #include "evsel.h" 15 #include "memswap.h" 16 #include "session.h" 17 #include "tool.h" 18 #include "sort.h" 19 #include "util.h" 20 #include "cpumap.h" 21 #include "perf_regs.h" 22 #include "asm/bug.h" 23 #include "auxtrace.h" 24 #include "thread.h" 25 #include "thread-stack.h" 26 #include "stat.h" 27 28 static int perf_session__deliver_event(struct perf_session *session, 29 union perf_event *event, 30 struct perf_tool *tool, 31 u64 file_offset); 32 33 static int perf_session__open(struct perf_session *session) 34 { 35 struct perf_data *data = session->data; 36 37 if (perf_session__read_header(session) < 0) { 38 pr_err("incompatible file format (rerun with -v to learn more)\n"); 39 return -1; 40 } 41 42 if (perf_data__is_pipe(data)) 43 return 0; 44 45 if (perf_header__has_feat(&session->header, HEADER_STAT)) 46 return 0; 47 48 if (!perf_evlist__valid_sample_type(session->evlist)) { 49 pr_err("non matching sample_type\n"); 50 return -1; 51 } 52 53 if (!perf_evlist__valid_sample_id_all(session->evlist)) { 54 pr_err("non matching sample_id_all\n"); 55 return -1; 56 } 57 58 if (!perf_evlist__valid_read_format(session->evlist)) { 59 pr_err("non matching read_format\n"); 60 return -1; 61 } 62 63 return 0; 64 } 65 66 void perf_session__set_id_hdr_size(struct perf_session *session) 67 { 68 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist); 69 70 machines__set_id_hdr_size(&session->machines, id_hdr_size); 71 } 72 73 int perf_session__create_kernel_maps(struct perf_session *session) 74 { 75 int ret = machine__create_kernel_maps(&session->machines.host); 76 77 if (ret >= 0) 78 ret = machines__create_guest_kernel_maps(&session->machines); 79 return ret; 80 } 81 82 static void perf_session__destroy_kernel_maps(struct perf_session *session) 83 { 84 machines__destroy_kernel_maps(&session->machines); 85 } 86 87 static bool perf_session__has_comm_exec(struct perf_session *session) 88 { 89 struct perf_evsel *evsel; 90 91 evlist__for_each_entry(session->evlist, evsel) { 92 if (evsel->attr.comm_exec) 93 return true; 94 } 95 96 return false; 97 } 98 99 static void perf_session__set_comm_exec(struct perf_session *session) 100 { 101 bool comm_exec = perf_session__has_comm_exec(session); 102 103 machines__set_comm_exec(&session->machines, comm_exec); 104 } 105 106 static int ordered_events__deliver_event(struct ordered_events *oe, 107 struct ordered_event *event) 108 { 109 struct perf_session *session = container_of(oe, struct perf_session, 110 ordered_events); 111 112 return perf_session__deliver_event(session, event->event, 113 session->tool, event->file_offset); 114 } 115 116 struct perf_session *perf_session__new(struct perf_data *data, 117 bool repipe, struct perf_tool *tool) 118 { 119 struct perf_session *session = zalloc(sizeof(*session)); 120 121 if (!session) 122 goto out; 123 124 session->repipe = repipe; 125 session->tool = tool; 126 INIT_LIST_HEAD(&session->auxtrace_index); 127 machines__init(&session->machines); 128 ordered_events__init(&session->ordered_events, ordered_events__deliver_event); 129 130 if (data) { 131 if (perf_data__open(data)) 132 goto out_delete; 133 134 session->data = data; 135 136 if (perf_data__is_read(data)) { 137 if (perf_session__open(session) < 0) 138 goto out_close; 139 140 /* 141 * set session attributes that are present in perf.data 142 * but not in pipe-mode. 143 */ 144 if (!data->is_pipe) { 145 perf_session__set_id_hdr_size(session); 146 perf_session__set_comm_exec(session); 147 } 148 } 149 } else { 150 session->machines.host.env = &perf_env; 151 } 152 153 if (!data || perf_data__is_write(data)) { 154 /* 155 * In O_RDONLY mode this will be performed when reading the 156 * kernel MMAP event, in perf_event__process_mmap(). 157 */ 158 if (perf_session__create_kernel_maps(session) < 0) 159 pr_warning("Cannot read kernel map\n"); 160 } 161 162 /* 163 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is 164 * processed, so perf_evlist__sample_id_all is not meaningful here. 165 */ 166 if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps && 167 tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) { 168 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); 169 tool->ordered_events = false; 170 } 171 172 return session; 173 174 out_close: 175 perf_data__close(data); 176 out_delete: 177 perf_session__delete(session); 178 out: 179 return NULL; 180 } 181 182 static void perf_session__delete_threads(struct perf_session *session) 183 { 184 machine__delete_threads(&session->machines.host); 185 } 186 187 void perf_session__delete(struct perf_session *session) 188 { 189 if (session == NULL) 190 return; 191 auxtrace__free(session); 192 auxtrace_index__free(&session->auxtrace_index); 193 perf_session__destroy_kernel_maps(session); 194 perf_session__delete_threads(session); 195 perf_env__exit(&session->header.env); 196 machines__exit(&session->machines); 197 if (session->data) 198 perf_data__close(session->data); 199 free(session); 200 } 201 202 static int process_event_synth_tracing_data_stub(struct perf_tool *tool 203 __maybe_unused, 204 union perf_event *event 205 __maybe_unused, 206 struct perf_session *session 207 __maybe_unused) 208 { 209 dump_printf(": unhandled!\n"); 210 return 0; 211 } 212 213 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused, 214 union perf_event *event __maybe_unused, 215 struct perf_evlist **pevlist 216 __maybe_unused) 217 { 218 dump_printf(": unhandled!\n"); 219 return 0; 220 } 221 222 static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused, 223 union perf_event *event __maybe_unused, 224 struct perf_evlist **pevlist 225 __maybe_unused) 226 { 227 if (dump_trace) 228 perf_event__fprintf_event_update(event, stdout); 229 230 dump_printf(": unhandled!\n"); 231 return 0; 232 } 233 234 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused, 235 union perf_event *event __maybe_unused, 236 struct perf_sample *sample __maybe_unused, 237 struct perf_evsel *evsel __maybe_unused, 238 struct machine *machine __maybe_unused) 239 { 240 dump_printf(": unhandled!\n"); 241 return 0; 242 } 243 244 static int process_event_stub(struct perf_tool *tool __maybe_unused, 245 union perf_event *event __maybe_unused, 246 struct perf_sample *sample __maybe_unused, 247 struct machine *machine __maybe_unused) 248 { 249 dump_printf(": unhandled!\n"); 250 return 0; 251 } 252 253 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused, 254 union perf_event *event __maybe_unused, 255 struct ordered_events *oe __maybe_unused) 256 { 257 dump_printf(": unhandled!\n"); 258 return 0; 259 } 260 261 static int process_finished_round(struct perf_tool *tool, 262 union perf_event *event, 263 struct ordered_events *oe); 264 265 static int skipn(int fd, off_t n) 266 { 267 char buf[4096]; 268 ssize_t ret; 269 270 while (n > 0) { 271 ret = read(fd, buf, min(n, (off_t)sizeof(buf))); 272 if (ret <= 0) 273 return ret; 274 n -= ret; 275 } 276 277 return 0; 278 } 279 280 static s64 process_event_auxtrace_stub(struct perf_tool *tool __maybe_unused, 281 union perf_event *event, 282 struct perf_session *session 283 __maybe_unused) 284 { 285 dump_printf(": unhandled!\n"); 286 if (perf_data__is_pipe(session->data)) 287 skipn(perf_data__fd(session->data), event->auxtrace.size); 288 return event->auxtrace.size; 289 } 290 291 static int process_event_op2_stub(struct perf_tool *tool __maybe_unused, 292 union perf_event *event __maybe_unused, 293 struct perf_session *session __maybe_unused) 294 { 295 dump_printf(": unhandled!\n"); 296 return 0; 297 } 298 299 300 static 301 int process_event_thread_map_stub(struct perf_tool *tool __maybe_unused, 302 union perf_event *event __maybe_unused, 303 struct perf_session *session __maybe_unused) 304 { 305 if (dump_trace) 306 perf_event__fprintf_thread_map(event, stdout); 307 308 dump_printf(": unhandled!\n"); 309 return 0; 310 } 311 312 static 313 int process_event_cpu_map_stub(struct perf_tool *tool __maybe_unused, 314 union perf_event *event __maybe_unused, 315 struct perf_session *session __maybe_unused) 316 { 317 if (dump_trace) 318 perf_event__fprintf_cpu_map(event, stdout); 319 320 dump_printf(": unhandled!\n"); 321 return 0; 322 } 323 324 static 325 int process_event_stat_config_stub(struct perf_tool *tool __maybe_unused, 326 union perf_event *event __maybe_unused, 327 struct perf_session *session __maybe_unused) 328 { 329 if (dump_trace) 330 perf_event__fprintf_stat_config(event, stdout); 331 332 dump_printf(": unhandled!\n"); 333 return 0; 334 } 335 336 static int process_stat_stub(struct perf_tool *tool __maybe_unused, 337 union perf_event *event __maybe_unused, 338 struct perf_session *perf_session 339 __maybe_unused) 340 { 341 if (dump_trace) 342 perf_event__fprintf_stat(event, stdout); 343 344 dump_printf(": unhandled!\n"); 345 return 0; 346 } 347 348 static int process_stat_round_stub(struct perf_tool *tool __maybe_unused, 349 union perf_event *event __maybe_unused, 350 struct perf_session *perf_session 351 __maybe_unused) 352 { 353 if (dump_trace) 354 perf_event__fprintf_stat_round(event, stdout); 355 356 dump_printf(": unhandled!\n"); 357 return 0; 358 } 359 360 void perf_tool__fill_defaults(struct perf_tool *tool) 361 { 362 if (tool->sample == NULL) 363 tool->sample = process_event_sample_stub; 364 if (tool->mmap == NULL) 365 tool->mmap = process_event_stub; 366 if (tool->mmap2 == NULL) 367 tool->mmap2 = process_event_stub; 368 if (tool->comm == NULL) 369 tool->comm = process_event_stub; 370 if (tool->namespaces == NULL) 371 tool->namespaces = process_event_stub; 372 if (tool->fork == NULL) 373 tool->fork = process_event_stub; 374 if (tool->exit == NULL) 375 tool->exit = process_event_stub; 376 if (tool->lost == NULL) 377 tool->lost = perf_event__process_lost; 378 if (tool->lost_samples == NULL) 379 tool->lost_samples = perf_event__process_lost_samples; 380 if (tool->aux == NULL) 381 tool->aux = perf_event__process_aux; 382 if (tool->itrace_start == NULL) 383 tool->itrace_start = perf_event__process_itrace_start; 384 if (tool->context_switch == NULL) 385 tool->context_switch = perf_event__process_switch; 386 if (tool->read == NULL) 387 tool->read = process_event_sample_stub; 388 if (tool->throttle == NULL) 389 tool->throttle = process_event_stub; 390 if (tool->unthrottle == NULL) 391 tool->unthrottle = process_event_stub; 392 if (tool->attr == NULL) 393 tool->attr = process_event_synth_attr_stub; 394 if (tool->event_update == NULL) 395 tool->event_update = process_event_synth_event_update_stub; 396 if (tool->tracing_data == NULL) 397 tool->tracing_data = process_event_synth_tracing_data_stub; 398 if (tool->build_id == NULL) 399 tool->build_id = process_event_op2_stub; 400 if (tool->finished_round == NULL) { 401 if (tool->ordered_events) 402 tool->finished_round = process_finished_round; 403 else 404 tool->finished_round = process_finished_round_stub; 405 } 406 if (tool->id_index == NULL) 407 tool->id_index = process_event_op2_stub; 408 if (tool->auxtrace_info == NULL) 409 tool->auxtrace_info = process_event_op2_stub; 410 if (tool->auxtrace == NULL) 411 tool->auxtrace = process_event_auxtrace_stub; 412 if (tool->auxtrace_error == NULL) 413 tool->auxtrace_error = process_event_op2_stub; 414 if (tool->thread_map == NULL) 415 tool->thread_map = process_event_thread_map_stub; 416 if (tool->cpu_map == NULL) 417 tool->cpu_map = process_event_cpu_map_stub; 418 if (tool->stat_config == NULL) 419 tool->stat_config = process_event_stat_config_stub; 420 if (tool->stat == NULL) 421 tool->stat = process_stat_stub; 422 if (tool->stat_round == NULL) 423 tool->stat_round = process_stat_round_stub; 424 if (tool->time_conv == NULL) 425 tool->time_conv = process_event_op2_stub; 426 if (tool->feature == NULL) 427 tool->feature = 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 u64 timestamp, u64 file_offset) 869 { 870 return ordered_events__queue(&s->ordered_events, event, timestamp, 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_PHYS_ADDR) 1119 printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr); 1120 1121 if (sample_type & PERF_SAMPLE_TRANSACTION) 1122 printf("... transaction: %" PRIx64 "\n", sample->transaction); 1123 1124 if (sample_type & PERF_SAMPLE_READ) 1125 sample_read__printf(sample, evsel->attr.read_format); 1126 } 1127 1128 static void dump_read(struct perf_evsel *evsel, union perf_event *event) 1129 { 1130 struct read_event *read_event = &event->read; 1131 u64 read_format; 1132 1133 if (!dump_trace) 1134 return; 1135 1136 printf(": %d %d %s %" PRIu64 "\n", event->read.pid, event->read.tid, 1137 evsel ? perf_evsel__name(evsel) : "FAIL", 1138 event->read.value); 1139 1140 read_format = evsel->attr.read_format; 1141 1142 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1143 printf("... time enabled : %" PRIu64 "\n", read_event->time_enabled); 1144 1145 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1146 printf("... time running : %" PRIu64 "\n", read_event->time_running); 1147 1148 if (read_format & PERF_FORMAT_ID) 1149 printf("... id : %" PRIu64 "\n", read_event->id); 1150 } 1151 1152 static struct machine *machines__find_for_cpumode(struct machines *machines, 1153 union perf_event *event, 1154 struct perf_sample *sample) 1155 { 1156 struct machine *machine; 1157 1158 if (perf_guest && 1159 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 1160 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) { 1161 u32 pid; 1162 1163 if (event->header.type == PERF_RECORD_MMAP 1164 || event->header.type == PERF_RECORD_MMAP2) 1165 pid = event->mmap.pid; 1166 else 1167 pid = sample->pid; 1168 1169 machine = machines__find(machines, pid); 1170 if (!machine) 1171 machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID); 1172 return machine; 1173 } 1174 1175 return &machines->host; 1176 } 1177 1178 static int deliver_sample_value(struct perf_evlist *evlist, 1179 struct perf_tool *tool, 1180 union perf_event *event, 1181 struct perf_sample *sample, 1182 struct sample_read_value *v, 1183 struct machine *machine) 1184 { 1185 struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id); 1186 1187 if (sid) { 1188 sample->id = v->id; 1189 sample->period = v->value - sid->period; 1190 sid->period = v->value; 1191 } 1192 1193 if (!sid || sid->evsel == NULL) { 1194 ++evlist->stats.nr_unknown_id; 1195 return 0; 1196 } 1197 1198 return tool->sample(tool, event, sample, sid->evsel, machine); 1199 } 1200 1201 static int deliver_sample_group(struct perf_evlist *evlist, 1202 struct perf_tool *tool, 1203 union perf_event *event, 1204 struct perf_sample *sample, 1205 struct machine *machine) 1206 { 1207 int ret = -EINVAL; 1208 u64 i; 1209 1210 for (i = 0; i < sample->read.group.nr; i++) { 1211 ret = deliver_sample_value(evlist, tool, event, sample, 1212 &sample->read.group.values[i], 1213 machine); 1214 if (ret) 1215 break; 1216 } 1217 1218 return ret; 1219 } 1220 1221 static int 1222 perf_evlist__deliver_sample(struct perf_evlist *evlist, 1223 struct perf_tool *tool, 1224 union perf_event *event, 1225 struct perf_sample *sample, 1226 struct perf_evsel *evsel, 1227 struct machine *machine) 1228 { 1229 /* We know evsel != NULL. */ 1230 u64 sample_type = evsel->attr.sample_type; 1231 u64 read_format = evsel->attr.read_format; 1232 1233 /* Standard sample delivery. */ 1234 if (!(sample_type & PERF_SAMPLE_READ)) 1235 return tool->sample(tool, event, sample, evsel, machine); 1236 1237 /* For PERF_SAMPLE_READ we have either single or group mode. */ 1238 if (read_format & PERF_FORMAT_GROUP) 1239 return deliver_sample_group(evlist, tool, event, sample, 1240 machine); 1241 else 1242 return deliver_sample_value(evlist, tool, event, sample, 1243 &sample->read.one, machine); 1244 } 1245 1246 static int machines__deliver_event(struct machines *machines, 1247 struct perf_evlist *evlist, 1248 union perf_event *event, 1249 struct perf_sample *sample, 1250 struct perf_tool *tool, u64 file_offset) 1251 { 1252 struct perf_evsel *evsel; 1253 struct machine *machine; 1254 1255 dump_event(evlist, event, file_offset, sample); 1256 1257 evsel = perf_evlist__id2evsel(evlist, sample->id); 1258 1259 machine = machines__find_for_cpumode(machines, event, sample); 1260 1261 switch (event->header.type) { 1262 case PERF_RECORD_SAMPLE: 1263 if (evsel == NULL) { 1264 ++evlist->stats.nr_unknown_id; 1265 return 0; 1266 } 1267 dump_sample(evsel, event, sample); 1268 if (machine == NULL) { 1269 ++evlist->stats.nr_unprocessable_samples; 1270 return 0; 1271 } 1272 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine); 1273 case PERF_RECORD_MMAP: 1274 return tool->mmap(tool, event, sample, machine); 1275 case PERF_RECORD_MMAP2: 1276 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT) 1277 ++evlist->stats.nr_proc_map_timeout; 1278 return tool->mmap2(tool, event, sample, machine); 1279 case PERF_RECORD_COMM: 1280 return tool->comm(tool, event, sample, machine); 1281 case PERF_RECORD_NAMESPACES: 1282 return tool->namespaces(tool, event, sample, machine); 1283 case PERF_RECORD_FORK: 1284 return tool->fork(tool, event, sample, machine); 1285 case PERF_RECORD_EXIT: 1286 return tool->exit(tool, event, sample, machine); 1287 case PERF_RECORD_LOST: 1288 if (tool->lost == perf_event__process_lost) 1289 evlist->stats.total_lost += event->lost.lost; 1290 return tool->lost(tool, event, sample, machine); 1291 case PERF_RECORD_LOST_SAMPLES: 1292 if (tool->lost_samples == perf_event__process_lost_samples) 1293 evlist->stats.total_lost_samples += event->lost_samples.lost; 1294 return tool->lost_samples(tool, event, sample, machine); 1295 case PERF_RECORD_READ: 1296 dump_read(evsel, event); 1297 return tool->read(tool, event, sample, evsel, machine); 1298 case PERF_RECORD_THROTTLE: 1299 return tool->throttle(tool, event, sample, machine); 1300 case PERF_RECORD_UNTHROTTLE: 1301 return tool->unthrottle(tool, event, sample, machine); 1302 case PERF_RECORD_AUX: 1303 if (tool->aux == perf_event__process_aux) { 1304 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) 1305 evlist->stats.total_aux_lost += 1; 1306 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL) 1307 evlist->stats.total_aux_partial += 1; 1308 } 1309 return tool->aux(tool, event, sample, machine); 1310 case PERF_RECORD_ITRACE_START: 1311 return tool->itrace_start(tool, event, sample, machine); 1312 case PERF_RECORD_SWITCH: 1313 case PERF_RECORD_SWITCH_CPU_WIDE: 1314 return tool->context_switch(tool, event, sample, machine); 1315 default: 1316 ++evlist->stats.nr_unknown_events; 1317 return -1; 1318 } 1319 } 1320 1321 static int perf_session__deliver_event(struct perf_session *session, 1322 union perf_event *event, 1323 struct perf_tool *tool, 1324 u64 file_offset) 1325 { 1326 struct perf_sample sample; 1327 int ret; 1328 1329 ret = perf_evlist__parse_sample(session->evlist, event, &sample); 1330 if (ret) { 1331 pr_err("Can't parse sample, err = %d\n", ret); 1332 return ret; 1333 } 1334 1335 ret = auxtrace__process_event(session, event, &sample, tool); 1336 if (ret < 0) 1337 return ret; 1338 if (ret > 0) 1339 return 0; 1340 1341 return machines__deliver_event(&session->machines, session->evlist, 1342 event, &sample, tool, file_offset); 1343 } 1344 1345 static s64 perf_session__process_user_event(struct perf_session *session, 1346 union perf_event *event, 1347 u64 file_offset) 1348 { 1349 struct ordered_events *oe = &session->ordered_events; 1350 struct perf_tool *tool = session->tool; 1351 struct perf_sample sample = { .time = 0, }; 1352 int fd = perf_data__fd(session->data); 1353 int err; 1354 1355 dump_event(session->evlist, event, file_offset, &sample); 1356 1357 /* These events are processed right away */ 1358 switch (event->header.type) { 1359 case PERF_RECORD_HEADER_ATTR: 1360 err = tool->attr(tool, event, &session->evlist); 1361 if (err == 0) { 1362 perf_session__set_id_hdr_size(session); 1363 perf_session__set_comm_exec(session); 1364 } 1365 return err; 1366 case PERF_RECORD_EVENT_UPDATE: 1367 return tool->event_update(tool, event, &session->evlist); 1368 case PERF_RECORD_HEADER_EVENT_TYPE: 1369 /* 1370 * Depreceated, but we need to handle it for sake 1371 * of old data files create in pipe mode. 1372 */ 1373 return 0; 1374 case PERF_RECORD_HEADER_TRACING_DATA: 1375 /* setup for reading amidst mmap */ 1376 lseek(fd, file_offset, SEEK_SET); 1377 return tool->tracing_data(tool, event, session); 1378 case PERF_RECORD_HEADER_BUILD_ID: 1379 return tool->build_id(tool, event, session); 1380 case PERF_RECORD_FINISHED_ROUND: 1381 return tool->finished_round(tool, event, oe); 1382 case PERF_RECORD_ID_INDEX: 1383 return tool->id_index(tool, event, session); 1384 case PERF_RECORD_AUXTRACE_INFO: 1385 return tool->auxtrace_info(tool, event, session); 1386 case PERF_RECORD_AUXTRACE: 1387 /* setup for reading amidst mmap */ 1388 lseek(fd, file_offset + event->header.size, SEEK_SET); 1389 return tool->auxtrace(tool, event, session); 1390 case PERF_RECORD_AUXTRACE_ERROR: 1391 perf_session__auxtrace_error_inc(session, event); 1392 return tool->auxtrace_error(tool, event, session); 1393 case PERF_RECORD_THREAD_MAP: 1394 return tool->thread_map(tool, event, session); 1395 case PERF_RECORD_CPU_MAP: 1396 return tool->cpu_map(tool, event, session); 1397 case PERF_RECORD_STAT_CONFIG: 1398 return tool->stat_config(tool, event, session); 1399 case PERF_RECORD_STAT: 1400 return tool->stat(tool, event, session); 1401 case PERF_RECORD_STAT_ROUND: 1402 return tool->stat_round(tool, event, session); 1403 case PERF_RECORD_TIME_CONV: 1404 session->time_conv = event->time_conv; 1405 return tool->time_conv(tool, event, session); 1406 case PERF_RECORD_HEADER_FEATURE: 1407 return tool->feature(tool, event, session); 1408 default: 1409 return -EINVAL; 1410 } 1411 } 1412 1413 int perf_session__deliver_synth_event(struct perf_session *session, 1414 union perf_event *event, 1415 struct perf_sample *sample) 1416 { 1417 struct perf_evlist *evlist = session->evlist; 1418 struct perf_tool *tool = session->tool; 1419 1420 events_stats__inc(&evlist->stats, event->header.type); 1421 1422 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1423 return perf_session__process_user_event(session, event, 0); 1424 1425 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0); 1426 } 1427 1428 static void event_swap(union perf_event *event, bool sample_id_all) 1429 { 1430 perf_event__swap_op swap; 1431 1432 swap = perf_event__swap_ops[event->header.type]; 1433 if (swap) 1434 swap(event, sample_id_all); 1435 } 1436 1437 int perf_session__peek_event(struct perf_session *session, off_t file_offset, 1438 void *buf, size_t buf_sz, 1439 union perf_event **event_ptr, 1440 struct perf_sample *sample) 1441 { 1442 union perf_event *event; 1443 size_t hdr_sz, rest; 1444 int fd; 1445 1446 if (session->one_mmap && !session->header.needs_swap) { 1447 event = file_offset - session->one_mmap_offset + 1448 session->one_mmap_addr; 1449 goto out_parse_sample; 1450 } 1451 1452 if (perf_data__is_pipe(session->data)) 1453 return -1; 1454 1455 fd = perf_data__fd(session->data); 1456 hdr_sz = sizeof(struct perf_event_header); 1457 1458 if (buf_sz < hdr_sz) 1459 return -1; 1460 1461 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 || 1462 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz) 1463 return -1; 1464 1465 event = (union perf_event *)buf; 1466 1467 if (session->header.needs_swap) 1468 perf_event_header__bswap(&event->header); 1469 1470 if (event->header.size < hdr_sz || event->header.size > buf_sz) 1471 return -1; 1472 1473 rest = event->header.size - hdr_sz; 1474 1475 if (readn(fd, buf, rest) != (ssize_t)rest) 1476 return -1; 1477 1478 if (session->header.needs_swap) 1479 event_swap(event, perf_evlist__sample_id_all(session->evlist)); 1480 1481 out_parse_sample: 1482 1483 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START && 1484 perf_evlist__parse_sample(session->evlist, event, sample)) 1485 return -1; 1486 1487 *event_ptr = event; 1488 1489 return 0; 1490 } 1491 1492 static s64 perf_session__process_event(struct perf_session *session, 1493 union perf_event *event, u64 file_offset) 1494 { 1495 struct perf_evlist *evlist = session->evlist; 1496 struct perf_tool *tool = session->tool; 1497 int ret; 1498 1499 if (session->header.needs_swap) 1500 event_swap(event, perf_evlist__sample_id_all(evlist)); 1501 1502 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1503 return -EINVAL; 1504 1505 events_stats__inc(&evlist->stats, event->header.type); 1506 1507 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1508 return perf_session__process_user_event(session, event, file_offset); 1509 1510 if (tool->ordered_events) { 1511 u64 timestamp = -1ULL; 1512 1513 ret = perf_evlist__parse_sample_timestamp(evlist, event, ×tamp); 1514 if (ret && ret != -1) 1515 return ret; 1516 1517 ret = perf_session__queue_event(session, event, timestamp, file_offset); 1518 if (ret != -ETIME) 1519 return ret; 1520 } 1521 1522 return perf_session__deliver_event(session, event, tool, file_offset); 1523 } 1524 1525 void perf_event_header__bswap(struct perf_event_header *hdr) 1526 { 1527 hdr->type = bswap_32(hdr->type); 1528 hdr->misc = bswap_16(hdr->misc); 1529 hdr->size = bswap_16(hdr->size); 1530 } 1531 1532 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1533 { 1534 return machine__findnew_thread(&session->machines.host, -1, pid); 1535 } 1536 1537 int perf_session__register_idle_thread(struct perf_session *session) 1538 { 1539 struct thread *thread; 1540 int err = 0; 1541 1542 thread = machine__findnew_thread(&session->machines.host, 0, 0); 1543 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) { 1544 pr_err("problem inserting idle task.\n"); 1545 err = -1; 1546 } 1547 1548 if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) { 1549 pr_err("problem inserting idle task.\n"); 1550 err = -1; 1551 } 1552 1553 /* machine__findnew_thread() got the thread, so put it */ 1554 thread__put(thread); 1555 return err; 1556 } 1557 1558 static void 1559 perf_session__warn_order(const struct perf_session *session) 1560 { 1561 const struct ordered_events *oe = &session->ordered_events; 1562 struct perf_evsel *evsel; 1563 bool should_warn = true; 1564 1565 evlist__for_each_entry(session->evlist, evsel) { 1566 if (evsel->attr.write_backward) 1567 should_warn = false; 1568 } 1569 1570 if (!should_warn) 1571 return; 1572 if (oe->nr_unordered_events != 0) 1573 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events); 1574 } 1575 1576 static void perf_session__warn_about_errors(const struct perf_session *session) 1577 { 1578 const struct events_stats *stats = &session->evlist->stats; 1579 1580 if (session->tool->lost == perf_event__process_lost && 1581 stats->nr_events[PERF_RECORD_LOST] != 0) { 1582 ui__warning("Processed %d events and lost %d chunks!\n\n" 1583 "Check IO/CPU overload!\n\n", 1584 stats->nr_events[0], 1585 stats->nr_events[PERF_RECORD_LOST]); 1586 } 1587 1588 if (session->tool->lost_samples == perf_event__process_lost_samples) { 1589 double drop_rate; 1590 1591 drop_rate = (double)stats->total_lost_samples / 1592 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples); 1593 if (drop_rate > 0.05) { 1594 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n", 1595 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples, 1596 drop_rate * 100.0); 1597 } 1598 } 1599 1600 if (session->tool->aux == perf_event__process_aux && 1601 stats->total_aux_lost != 0) { 1602 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n", 1603 stats->total_aux_lost, 1604 stats->nr_events[PERF_RECORD_AUX]); 1605 } 1606 1607 if (session->tool->aux == perf_event__process_aux && 1608 stats->total_aux_partial != 0) { 1609 bool vmm_exclusive = false; 1610 1611 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive", 1612 &vmm_exclusive); 1613 1614 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n" 1615 "Are you running a KVM guest in the background?%s\n\n", 1616 stats->total_aux_partial, 1617 stats->nr_events[PERF_RECORD_AUX], 1618 vmm_exclusive ? 1619 "\nReloading kvm_intel module with vmm_exclusive=0\n" 1620 "will reduce the gaps to only guest's timeslices." : 1621 ""); 1622 } 1623 1624 if (stats->nr_unknown_events != 0) { 1625 ui__warning("Found %u unknown events!\n\n" 1626 "Is this an older tool processing a perf.data " 1627 "file generated by a more recent tool?\n\n" 1628 "If that is not the case, consider " 1629 "reporting to linux-kernel@vger.kernel.org.\n\n", 1630 stats->nr_unknown_events); 1631 } 1632 1633 if (stats->nr_unknown_id != 0) { 1634 ui__warning("%u samples with id not present in the header\n", 1635 stats->nr_unknown_id); 1636 } 1637 1638 if (stats->nr_invalid_chains != 0) { 1639 ui__warning("Found invalid callchains!\n\n" 1640 "%u out of %u events were discarded for this reason.\n\n" 1641 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1642 stats->nr_invalid_chains, 1643 stats->nr_events[PERF_RECORD_SAMPLE]); 1644 } 1645 1646 if (stats->nr_unprocessable_samples != 0) { 1647 ui__warning("%u unprocessable samples recorded.\n" 1648 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1649 stats->nr_unprocessable_samples); 1650 } 1651 1652 perf_session__warn_order(session); 1653 1654 events_stats__auxtrace_error_warn(stats); 1655 1656 if (stats->nr_proc_map_timeout != 0) { 1657 ui__warning("%d map information files for pre-existing threads were\n" 1658 "not processed, if there are samples for addresses they\n" 1659 "will not be resolved, you may find out which are these\n" 1660 "threads by running with -v and redirecting the output\n" 1661 "to a file.\n" 1662 "The time limit to process proc map is too short?\n" 1663 "Increase it by --proc-map-timeout\n", 1664 stats->nr_proc_map_timeout); 1665 } 1666 } 1667 1668 static int perf_session__flush_thread_stack(struct thread *thread, 1669 void *p __maybe_unused) 1670 { 1671 return thread_stack__flush(thread); 1672 } 1673 1674 static int perf_session__flush_thread_stacks(struct perf_session *session) 1675 { 1676 return machines__for_each_thread(&session->machines, 1677 perf_session__flush_thread_stack, 1678 NULL); 1679 } 1680 1681 volatile int session_done; 1682 1683 static int __perf_session__process_pipe_events(struct perf_session *session) 1684 { 1685 struct ordered_events *oe = &session->ordered_events; 1686 struct perf_tool *tool = session->tool; 1687 int fd = perf_data__fd(session->data); 1688 union perf_event *event; 1689 uint32_t size, cur_size = 0; 1690 void *buf = NULL; 1691 s64 skip = 0; 1692 u64 head; 1693 ssize_t err; 1694 void *p; 1695 1696 perf_tool__fill_defaults(tool); 1697 1698 head = 0; 1699 cur_size = sizeof(union perf_event); 1700 1701 buf = malloc(cur_size); 1702 if (!buf) 1703 return -errno; 1704 ordered_events__set_copy_on_queue(oe, true); 1705 more: 1706 event = buf; 1707 err = readn(fd, event, sizeof(struct perf_event_header)); 1708 if (err <= 0) { 1709 if (err == 0) 1710 goto done; 1711 1712 pr_err("failed to read event header\n"); 1713 goto out_err; 1714 } 1715 1716 if (session->header.needs_swap) 1717 perf_event_header__bswap(&event->header); 1718 1719 size = event->header.size; 1720 if (size < sizeof(struct perf_event_header)) { 1721 pr_err("bad event header size\n"); 1722 goto out_err; 1723 } 1724 1725 if (size > cur_size) { 1726 void *new = realloc(buf, size); 1727 if (!new) { 1728 pr_err("failed to allocate memory to read event\n"); 1729 goto out_err; 1730 } 1731 buf = new; 1732 cur_size = size; 1733 event = buf; 1734 } 1735 p = event; 1736 p += sizeof(struct perf_event_header); 1737 1738 if (size - sizeof(struct perf_event_header)) { 1739 err = readn(fd, p, size - sizeof(struct perf_event_header)); 1740 if (err <= 0) { 1741 if (err == 0) { 1742 pr_err("unexpected end of event stream\n"); 1743 goto done; 1744 } 1745 1746 pr_err("failed to read event data\n"); 1747 goto out_err; 1748 } 1749 } 1750 1751 if ((skip = perf_session__process_event(session, event, head)) < 0) { 1752 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1753 head, event->header.size, event->header.type); 1754 err = -EINVAL; 1755 goto out_err; 1756 } 1757 1758 head += size; 1759 1760 if (skip > 0) 1761 head += skip; 1762 1763 if (!session_done()) 1764 goto more; 1765 done: 1766 /* do the final flush for ordered samples */ 1767 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 1768 if (err) 1769 goto out_err; 1770 err = auxtrace__flush_events(session, tool); 1771 if (err) 1772 goto out_err; 1773 err = perf_session__flush_thread_stacks(session); 1774 out_err: 1775 free(buf); 1776 if (!tool->no_warn) 1777 perf_session__warn_about_errors(session); 1778 ordered_events__free(&session->ordered_events); 1779 auxtrace__free_events(session); 1780 return err; 1781 } 1782 1783 static union perf_event * 1784 fetch_mmaped_event(struct perf_session *session, 1785 u64 head, size_t mmap_size, char *buf) 1786 { 1787 union perf_event *event; 1788 1789 /* 1790 * Ensure we have enough space remaining to read 1791 * the size of the event in the headers. 1792 */ 1793 if (head + sizeof(event->header) > mmap_size) 1794 return NULL; 1795 1796 event = (union perf_event *)(buf + head); 1797 1798 if (session->header.needs_swap) 1799 perf_event_header__bswap(&event->header); 1800 1801 if (head + event->header.size > mmap_size) { 1802 /* We're not fetching the event so swap back again */ 1803 if (session->header.needs_swap) 1804 perf_event_header__bswap(&event->header); 1805 return NULL; 1806 } 1807 1808 return event; 1809 } 1810 1811 /* 1812 * On 64bit we can mmap the data file in one go. No need for tiny mmap 1813 * slices. On 32bit we use 32MB. 1814 */ 1815 #if BITS_PER_LONG == 64 1816 #define MMAP_SIZE ULLONG_MAX 1817 #define NUM_MMAPS 1 1818 #else 1819 #define MMAP_SIZE (32 * 1024 * 1024ULL) 1820 #define NUM_MMAPS 128 1821 #endif 1822 1823 static int __perf_session__process_events(struct perf_session *session, 1824 u64 data_offset, u64 data_size, 1825 u64 file_size) 1826 { 1827 struct ordered_events *oe = &session->ordered_events; 1828 struct perf_tool *tool = session->tool; 1829 int fd = perf_data__fd(session->data); 1830 u64 head, page_offset, file_offset, file_pos, size; 1831 int err, mmap_prot, mmap_flags, map_idx = 0; 1832 size_t mmap_size; 1833 char *buf, *mmaps[NUM_MMAPS]; 1834 union perf_event *event; 1835 struct ui_progress prog; 1836 s64 skip; 1837 1838 perf_tool__fill_defaults(tool); 1839 1840 page_offset = page_size * (data_offset / page_size); 1841 file_offset = page_offset; 1842 head = data_offset - page_offset; 1843 1844 if (data_size == 0) 1845 goto out; 1846 1847 if (data_offset + data_size < file_size) 1848 file_size = data_offset + data_size; 1849 1850 ui_progress__init_size(&prog, file_size, "Processing events..."); 1851 1852 mmap_size = MMAP_SIZE; 1853 if (mmap_size > file_size) { 1854 mmap_size = file_size; 1855 session->one_mmap = true; 1856 } 1857 1858 memset(mmaps, 0, sizeof(mmaps)); 1859 1860 mmap_prot = PROT_READ; 1861 mmap_flags = MAP_SHARED; 1862 1863 if (session->header.needs_swap) { 1864 mmap_prot |= PROT_WRITE; 1865 mmap_flags = MAP_PRIVATE; 1866 } 1867 remap: 1868 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd, 1869 file_offset); 1870 if (buf == MAP_FAILED) { 1871 pr_err("failed to mmap file\n"); 1872 err = -errno; 1873 goto out_err; 1874 } 1875 mmaps[map_idx] = buf; 1876 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 1877 file_pos = file_offset + head; 1878 if (session->one_mmap) { 1879 session->one_mmap_addr = buf; 1880 session->one_mmap_offset = file_offset; 1881 } 1882 1883 more: 1884 event = fetch_mmaped_event(session, head, mmap_size, buf); 1885 if (!event) { 1886 if (mmaps[map_idx]) { 1887 munmap(mmaps[map_idx], mmap_size); 1888 mmaps[map_idx] = NULL; 1889 } 1890 1891 page_offset = page_size * (head / page_size); 1892 file_offset += page_offset; 1893 head -= page_offset; 1894 goto remap; 1895 } 1896 1897 size = event->header.size; 1898 1899 if (size < sizeof(struct perf_event_header) || 1900 (skip = perf_session__process_event(session, event, file_pos)) < 0) { 1901 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1902 file_offset + head, event->header.size, 1903 event->header.type); 1904 err = -EINVAL; 1905 goto out_err; 1906 } 1907 1908 if (skip) 1909 size += skip; 1910 1911 head += size; 1912 file_pos += size; 1913 1914 ui_progress__update(&prog, size); 1915 1916 if (session_done()) 1917 goto out; 1918 1919 if (file_pos < file_size) 1920 goto more; 1921 1922 out: 1923 /* do the final flush for ordered samples */ 1924 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 1925 if (err) 1926 goto out_err; 1927 err = auxtrace__flush_events(session, tool); 1928 if (err) 1929 goto out_err; 1930 err = perf_session__flush_thread_stacks(session); 1931 out_err: 1932 ui_progress__finish(); 1933 if (!tool->no_warn) 1934 perf_session__warn_about_errors(session); 1935 /* 1936 * We may switching perf.data output, make ordered_events 1937 * reusable. 1938 */ 1939 ordered_events__reinit(&session->ordered_events); 1940 auxtrace__free_events(session); 1941 session->one_mmap = false; 1942 return err; 1943 } 1944 1945 int perf_session__process_events(struct perf_session *session) 1946 { 1947 u64 size = perf_data__size(session->data); 1948 int err; 1949 1950 if (perf_session__register_idle_thread(session) < 0) 1951 return -ENOMEM; 1952 1953 if (!perf_data__is_pipe(session->data)) 1954 err = __perf_session__process_events(session, 1955 session->header.data_offset, 1956 session->header.data_size, size); 1957 else 1958 err = __perf_session__process_pipe_events(session); 1959 1960 return err; 1961 } 1962 1963 bool perf_session__has_traces(struct perf_session *session, const char *msg) 1964 { 1965 struct perf_evsel *evsel; 1966 1967 evlist__for_each_entry(session->evlist, evsel) { 1968 if (evsel->attr.type == PERF_TYPE_TRACEPOINT) 1969 return true; 1970 } 1971 1972 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 1973 return false; 1974 } 1975 1976 int maps__set_kallsyms_ref_reloc_sym(struct map **maps, 1977 const char *symbol_name, u64 addr) 1978 { 1979 char *bracket; 1980 int i; 1981 struct ref_reloc_sym *ref; 1982 1983 ref = zalloc(sizeof(struct ref_reloc_sym)); 1984 if (ref == NULL) 1985 return -ENOMEM; 1986 1987 ref->name = strdup(symbol_name); 1988 if (ref->name == NULL) { 1989 free(ref); 1990 return -ENOMEM; 1991 } 1992 1993 bracket = strchr(ref->name, ']'); 1994 if (bracket) 1995 *bracket = '\0'; 1996 1997 ref->addr = addr; 1998 1999 for (i = 0; i < MAP__NR_TYPES; ++i) { 2000 struct kmap *kmap = map__kmap(maps[i]); 2001 2002 if (!kmap) 2003 continue; 2004 kmap->ref_reloc_sym = ref; 2005 } 2006 2007 return 0; 2008 } 2009 2010 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp) 2011 { 2012 return machines__fprintf_dsos(&session->machines, fp); 2013 } 2014 2015 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp, 2016 bool (skip)(struct dso *dso, int parm), int parm) 2017 { 2018 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm); 2019 } 2020 2021 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 2022 { 2023 size_t ret; 2024 const char *msg = ""; 2025 2026 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE)) 2027 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)"; 2028 2029 ret = fprintf(fp, "\nAggregated stats:%s\n", msg); 2030 2031 ret += events_stats__fprintf(&session->evlist->stats, fp); 2032 return ret; 2033 } 2034 2035 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 2036 { 2037 /* 2038 * FIXME: Here we have to actually print all the machines in this 2039 * session, not just the host... 2040 */ 2041 return machine__fprintf(&session->machines.host, fp); 2042 } 2043 2044 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, 2045 unsigned int type) 2046 { 2047 struct perf_evsel *pos; 2048 2049 evlist__for_each_entry(session->evlist, pos) { 2050 if (pos->attr.type == type) 2051 return pos; 2052 } 2053 return NULL; 2054 } 2055 2056 int perf_session__cpu_bitmap(struct perf_session *session, 2057 const char *cpu_list, unsigned long *cpu_bitmap) 2058 { 2059 int i, err = -1; 2060 struct cpu_map *map; 2061 2062 for (i = 0; i < PERF_TYPE_MAX; ++i) { 2063 struct perf_evsel *evsel; 2064 2065 evsel = perf_session__find_first_evtype(session, i); 2066 if (!evsel) 2067 continue; 2068 2069 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) { 2070 pr_err("File does not contain CPU events. " 2071 "Remove -C option to proceed.\n"); 2072 return -1; 2073 } 2074 } 2075 2076 map = cpu_map__new(cpu_list); 2077 if (map == NULL) { 2078 pr_err("Invalid cpu_list\n"); 2079 return -1; 2080 } 2081 2082 for (i = 0; i < map->nr; i++) { 2083 int cpu = map->map[i]; 2084 2085 if (cpu >= MAX_NR_CPUS) { 2086 pr_err("Requested CPU %d too large. " 2087 "Consider raising MAX_NR_CPUS\n", cpu); 2088 goto out_delete_map; 2089 } 2090 2091 set_bit(cpu, cpu_bitmap); 2092 } 2093 2094 err = 0; 2095 2096 out_delete_map: 2097 cpu_map__put(map); 2098 return err; 2099 } 2100 2101 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 2102 bool full) 2103 { 2104 if (session == NULL || fp == NULL) 2105 return; 2106 2107 fprintf(fp, "# ========\n"); 2108 perf_header__fprintf_info(session, fp, full); 2109 fprintf(fp, "# ========\n#\n"); 2110 } 2111 2112 2113 int __perf_session__set_tracepoints_handlers(struct perf_session *session, 2114 const struct perf_evsel_str_handler *assocs, 2115 size_t nr_assocs) 2116 { 2117 struct perf_evsel *evsel; 2118 size_t i; 2119 int err; 2120 2121 for (i = 0; i < nr_assocs; i++) { 2122 /* 2123 * Adding a handler for an event not in the session, 2124 * just ignore it. 2125 */ 2126 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name); 2127 if (evsel == NULL) 2128 continue; 2129 2130 err = -EEXIST; 2131 if (evsel->handler != NULL) 2132 goto out; 2133 evsel->handler = assocs[i].handler; 2134 } 2135 2136 err = 0; 2137 out: 2138 return err; 2139 } 2140 2141 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused, 2142 union perf_event *event, 2143 struct perf_session *session) 2144 { 2145 struct perf_evlist *evlist = session->evlist; 2146 struct id_index_event *ie = &event->id_index; 2147 size_t i, nr, max_nr; 2148 2149 max_nr = (ie->header.size - sizeof(struct id_index_event)) / 2150 sizeof(struct id_index_entry); 2151 nr = ie->nr; 2152 if (nr > max_nr) 2153 return -EINVAL; 2154 2155 if (dump_trace) 2156 fprintf(stdout, " nr: %zu\n", nr); 2157 2158 for (i = 0; i < nr; i++) { 2159 struct id_index_entry *e = &ie->entries[i]; 2160 struct perf_sample_id *sid; 2161 2162 if (dump_trace) { 2163 fprintf(stdout, " ... id: %"PRIu64, e->id); 2164 fprintf(stdout, " idx: %"PRIu64, e->idx); 2165 fprintf(stdout, " cpu: %"PRId64, e->cpu); 2166 fprintf(stdout, " tid: %"PRId64"\n", e->tid); 2167 } 2168 2169 sid = perf_evlist__id2sid(evlist, e->id); 2170 if (!sid) 2171 return -ENOENT; 2172 sid->idx = e->idx; 2173 sid->cpu = e->cpu; 2174 sid->tid = e->tid; 2175 } 2176 return 0; 2177 } 2178 2179 int perf_event__synthesize_id_index(struct perf_tool *tool, 2180 perf_event__handler_t process, 2181 struct perf_evlist *evlist, 2182 struct machine *machine) 2183 { 2184 union perf_event *ev; 2185 struct perf_evsel *evsel; 2186 size_t nr = 0, i = 0, sz, max_nr, n; 2187 int err; 2188 2189 pr_debug2("Synthesizing id index\n"); 2190 2191 max_nr = (UINT16_MAX - sizeof(struct id_index_event)) / 2192 sizeof(struct id_index_entry); 2193 2194 evlist__for_each_entry(evlist, evsel) 2195 nr += evsel->ids; 2196 2197 n = nr > max_nr ? max_nr : nr; 2198 sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry); 2199 ev = zalloc(sz); 2200 if (!ev) 2201 return -ENOMEM; 2202 2203 ev->id_index.header.type = PERF_RECORD_ID_INDEX; 2204 ev->id_index.header.size = sz; 2205 ev->id_index.nr = n; 2206 2207 evlist__for_each_entry(evlist, evsel) { 2208 u32 j; 2209 2210 for (j = 0; j < evsel->ids; j++) { 2211 struct id_index_entry *e; 2212 struct perf_sample_id *sid; 2213 2214 if (i >= n) { 2215 err = process(tool, ev, NULL, machine); 2216 if (err) 2217 goto out_err; 2218 nr -= n; 2219 i = 0; 2220 } 2221 2222 e = &ev->id_index.entries[i++]; 2223 2224 e->id = evsel->id[j]; 2225 2226 sid = perf_evlist__id2sid(evlist, e->id); 2227 if (!sid) { 2228 free(ev); 2229 return -ENOENT; 2230 } 2231 2232 e->idx = sid->idx; 2233 e->cpu = sid->cpu; 2234 e->tid = sid->tid; 2235 } 2236 } 2237 2238 sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry); 2239 ev->id_index.header.size = sz; 2240 ev->id_index.nr = nr; 2241 2242 err = process(tool, ev, NULL, machine); 2243 out_err: 2244 free(ev); 2245 2246 return err; 2247 } 2248