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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 | /* * Copyright (c) 2017 Apple Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * "Portions Copyright (c) 1999 Apple Computer, Inc. All Rights * Reserved. This file contains Original Code and/or Modifications of * Original Code as defined in and that are subject to the Apple Public * Source License Version 1.0 (the 'License'). You may not use this file * except in compliance with the License. Please obtain a copy of the * License at http://www.apple.com/publicsource and read it before using * this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License." * * @APPLE_LICENSE_HEADER_END@ */ #include <map> #include <set> #include <memory> #include <string> #include <cstring> #include <array> #include <vector> #include <iomanip> #include <sstream> #include <iostream> #include <cinttypes> #include <dlfcn.h> #include <unistd.h> #include <stdint.h> #include <termios.h> #include <sys/ioctl.h> #include <libutil.h> #include <ktrace/session.h> #include <dispatch/dispatch.h> #include <System/sys/kdebug.h> #include "Tracing.h" #define DBG_FUNC_ALL (DBG_FUNC_START | DBG_FUNC_END) /* * MAXCOLS controls when extra data kicks in. * MAX_WIDE_MODE_COLS controls -w mode to get even wider data in path. */ #define MAXCOLS (132) #define MAXWIDTH (MAXCOLS + 64) unsigned int columns = 0; ktrace_session_t s; bool wideflag = false; bool RAW_flag = false; bool JSON_flag = false; bool JSON_Tracing_flag = false; dispatch_source_t sigwinch_source; static void exit_usage(void) { fprintf(stderr, "Usage: dyld_usage [-e] [-f mode] [-t seconds] [-R rawfile [-S start_time] [-E end_time]] [pid | cmd [pid | cmd] ...]\n"); fprintf(stderr, " -e exclude the specified list of pids from the sample\n"); fprintf(stderr, " and exclude dyld_usage by default\n"); fprintf(stderr, " -t specifies timeout in seconds (for use in automated tools)\n"); fprintf(stderr, " -R specifies a raw trace file to process\n"); fprintf(stderr, " pid selects process(s) to sample\n"); fprintf(stderr, " cmd selects process(s) matching command string to sample\n"); fprintf(stderr, "By default (no options) the following processes are excluded from the output:\n"); fprintf(stderr, "dyld_usage, Terminal, telnetd, sshd, rlogind, tcsh, csh, sh\n\n"); exit(1); } static void get_screenwidth(void) { struct winsize size; columns = MAXCOLS; if (isatty(STDOUT_FILENO)) { if (ioctl(1, TIOCGWINSZ, &size) != -1) { columns = size.ws_col; if (columns > MAXWIDTH) columns = MAXWIDTH; } } } std::map<uint64_t, uint64_t> gActiveStringIDs; std::map<uint64_t, std::string> gActiveStrings; const std::string& stringForID(uint64_t id) { static std::string emptyString = ""; auto i = gActiveStrings.find(id); if (i == gActiveStrings.end()) return emptyString; return i->second; } static uint64_t mach_to_nano(uint64_t mach) { uint64_t nanoseconds = 0; assert(ktrace_convert_timestamp_to_nanoseconds(s, mach, &nanoseconds) == 0); return nanoseconds; } static std::string safeStringFromCString(const char *str) { if (str) { return str; } return ""; } struct output_renderer { output_renderer(ktrace_session_t S, ktrace_event_t E) : _commandName(safeStringFromCString(ktrace_get_execname_for_thread(s, E->threadid))), _threadid((unsigned long)(E->threadid)), _pid(ktrace_get_pid_for_thread(s, E->threadid)) {} void recordEvent(ktrace_event_t event) { uint32_t code = event->debugid & KDBG_EVENTID_MASK; if (event->debugid & DBG_FUNC_START) { switch(code) { case DBG_DYLD_TIMING_DLOPEN: enqueueEvent<dlopen>(event, true); break; case DBG_DYLD_TIMING_DLOPEN_PREFLIGHT: enqueueEvent<dlopen_preflight>(event, true); break; case DBG_DYLD_TIMING_LAUNCH_EXECUTABLE: enqueueEvent<app_launch>(event, true); break; case DBG_DYLD_TIMING_DLSYM: enqueueEvent<dlsym>(event, true); break; case DBG_DYLD_TIMING_STATIC_INITIALIZER: enqueueEvent<static_init>(event, false); break; case DBG_DYLD_TIMING_MAP_IMAGE: enqueueEvent<map_image>(event, false); break; case DBG_DYLD_TIMING_APPLY_FIXUPS: enqueueEvent<apply_fixups>(event, false); break; case DBG_DYLD_TIMING_ATTACH_CODESIGNATURE: enqueueEvent<attach_signature>(event, false); break; case DBG_DYLD_TIMING_BUILD_CLOSURE: enqueueEvent<build_closure>(event, false); break; case DBG_DYLD_TIMING_DLADDR: enqueueEvent<dladdr>(event, true); break; case DBG_DYLD_TIMING_DLCLOSE: enqueueEvent<dlclose>(event, true); break; case DBG_DYLD_TIMING_FUNC_FOR_ADD_IMAGE: enqueueEvent<add_image_callback>(event, false); break; case DBG_DYLD_TIMING_FUNC_FOR_REMOVE_IMAGE: enqueueEvent<remove_image_callback>(event, false); break; case DBG_DYLD_TIMING_OBJC_INIT: enqueueEvent<objc_image_init>(event, false); break; case DBG_DYLD_TIMING_OBJC_MAP: enqueueEvent<objc_images_map>(event, false); break; } } else { switch(code) { case DBG_DYLD_TIMING_DLOPEN: dequeueEvent<dlopen>(event, [&](dlopen* endEvent){ endEvent->result = event->arg2; }); break; case DBG_DYLD_TIMING_DLOPEN_PREFLIGHT: dequeueEvent<dlopen_preflight>(event, [&](dlopen_preflight* endEvent){ endEvent->result = event->arg2; }); break; case DBG_DYLD_TIMING_LAUNCH_EXECUTABLE: dequeueEvent<app_launch>(event, [&](app_launch* endEvent){ endEvent->launchMode = event->arg4; }); break; case DBG_DYLD_TIMING_DLSYM: dequeueEvent<dlsym>(event, [&](dlsym* endEvent){ endEvent->result = event->arg2; }); break; case DBG_DYLD_TIMING_STATIC_INITIALIZER: dequeueEvent<static_init>(event, [&](static_init* endEvent){}); break; case DBG_DYLD_TIMING_MAP_IMAGE: dequeueEvent<map_image>(event, [&](map_image* endEvent){ endEvent->result = event->arg2; }); break; case DBG_DYLD_TIMING_APPLY_FIXUPS: dequeueEvent<apply_fixups>(event, [&](apply_fixups* endEvent){}); break; case DBG_DYLD_TIMING_ATTACH_CODESIGNATURE: dequeueEvent<attach_signature>(event, [&](attach_signature* endEvent){}); break; case DBG_DYLD_TIMING_BUILD_CLOSURE: dequeueEvent<build_closure>(event, [&](build_closure* endEvent){ endEvent->closureBuildState = event->arg2; }); break; case DBG_DYLD_TIMING_DLCLOSE: dequeueEvent<dlclose>(event, [&](dlclose* endEvent){ endEvent->result = (int)event->arg2; }); break; case DBG_DYLD_TIMING_DLADDR: dequeueEvent<dladdr>(event, [&](dladdr* endEvent){ endEvent->result = (int)event->arg2; endEvent->imageAddress = (int)event->arg3; endEvent->symbolAddress = (int)event->arg4; }); break; case DBG_DYLD_TIMING_FUNC_FOR_ADD_IMAGE: dequeueEvent<add_image_callback>(event, [&](add_image_callback* endEvent){}); break; case DBG_DYLD_TIMING_FUNC_FOR_REMOVE_IMAGE: dequeueEvent<remove_image_callback>(event, [&](remove_image_callback* endEvent){}); break; case DBG_DYLD_TIMING_OBJC_INIT: dequeueEvent<objc_image_init>(event, [&](objc_image_init* endEvent){}); break; case DBG_DYLD_TIMING_OBJC_MAP: dequeueEvent<objc_images_map>(event, [&](objc_images_map* endEvent){}); break; } } } bool empty() { return !_currentRootEvent && _eventStack.empty() && _rootEvents.empty(); } private: template<typename T> void enqueueEvent(ktrace_event_t event, bool rootEvent) { auto sharedEvent = std::make_shared<T>(event); if (!_currentRootEvent) { if (!rootEvent) return; assert(_eventStack.empty()); _currentRootEvent = sharedEvent; } else { sharedEvent->setDepth(_eventStack.size()); _eventStack.back()->addChild(sharedEvent); } _eventStack.push_back(sharedEvent); } template<typename T> void dequeueEvent(ktrace_event_t event, std::function<void(T*)> lambda) { if (_eventStack.empty()) return; auto currentEvent = dynamic_cast<T*>(_eventStack.back().get()); currentEvent->setEndEvent(event); lambda(currentEvent); _eventStack.pop_back(); if (_currentRootEvent && _eventStack.empty()) { output(_currentRootEvent); _currentRootEvent = nullptr; } } struct event_pair { event_pair(ktrace_event_t E) : _startTime(E->timestamp), _walltime(E->walltime), _threadid((unsigned long)(E->threadid)), _depth(0), _eventCode(KDBG_EXTRACT_CODE(E->debugid)) {}; virtual ~event_pair(){} std::vector<std::shared_ptr<event_pair>>& children() { return _children; } void setDepth(uint64_t D) { _depth = D; } uint64_t depth() { return _depth; } struct timeval walltime() { return _walltime; }; uint64_t startTimestamp() { return _startTime; }; uint64_t endTimestamp() { return _endTime; } unsigned long threadid() { return _threadid; } void addChild(std::shared_ptr<event_pair> child) {_children.push_back(child);} void setEndEvent(ktrace_event_t E) { _endTime = E->timestamp; } uint16_t eventCode() const { return _eventCode; } private: std::vector<std::shared_ptr<event_pair>> _children; uint64_t _startTime; uint64_t _endTime; uint64_t _depth; unsigned long _threadid; uint16_t _eventCode; struct timeval _walltime; }; time_t _lastTimeWallSeconds = -1; std::string _timestampStr; std::string _commandName; pid_t _pid; unsigned long _threadid; std::string timestamp(std::shared_ptr<event_pair> event, bool extended) { std::ostringstream result; struct timeval now_walltime = event->walltime(); assert(now_walltime.tv_sec || now_walltime.tv_usec); /* try and reuse the timestamp string */ if (_lastTimeWallSeconds != now_walltime.tv_sec) { char timestamp[32]; (void)strftime(timestamp, sizeof (timestamp), "%H:%M:%S", localtime(&now_walltime.tv_sec)); _lastTimeWallSeconds = now_walltime.tv_sec; _timestampStr = timestamp; } result << _timestampStr; if (extended) { result << "." << std::setw(6) << std::setfill('0') << std::to_string(now_walltime.tv_usec); } return result.str(); } std::string process(std::shared_ptr<event_pair> event, bool extended) { if (extended) { std::ostringstream result; result << _commandName << "." << std::to_string(event->threadid()); return result.str(); } else { std::string result = _commandName; result.resize(12, ' '); return result; } } std::string duration(std::shared_ptr<event_pair> event) { std::ostringstream result; uint64_t usecs = (mach_to_nano(event->endTimestamp() - event->startTimestamp()) + (NSEC_PER_USEC - 1)) / NSEC_PER_USEC; uint64_t secs = usecs / USEC_PER_SEC; usecs -= secs * USEC_PER_SEC; result << secs << "." << std::setw(6) << std::setfill('0') << usecs; return result.str(); } public: void outputConsole(std::shared_ptr<event_pair> node, uint64_t width, std::ostringstream& sstr, uint64_t depth) { std::ostringstream line; bool extended = false; if (auto dlopenNode = dynamic_cast<dlopen *>(node.get())) { line << "dlopen(\"" << dlopenNode->path << "\", " << dlopenNode->flagString() << ") -> 0x" << dlopenNode->result; } else if (auto dlopenPreflightNode = dynamic_cast<dlopen_preflight *>(node.get())) { line << "dlopen_preflight(\"" << dlopenPreflightNode->path << ") -> 0x" << dlopenPreflightNode->result; } else if (auto dlsymNode = dynamic_cast<dlsym *>(node.get())) { line << "dlsym(0x" << std::hex << dlsymNode->handle << ", \"" << dlsymNode->symbol << "\") -> " << dlsymNode->result; } else if (auto mapImageNode = dynamic_cast<map_image *>(node.get())) { line << "map file \"" << mapImageNode->path << "\" -> 0x" << std::hex << mapImageNode->result; } else if (auto sigNode = dynamic_cast<attach_signature *>(node.get())) { line << "attach codesignature"; } else if (auto buildClosureNode = dynamic_cast<build_closure *>(node.get())) { line << "build closure -> " << buildClosureNode->buildStateString(); } else if (auto launchNode = dynamic_cast<app_launch *>(node.get())) { line << "app launch (dyld" << std::dec << launchNode->launchMode << ") -> 0x" << std::hex << launchNode->address; } else if (auto initNode = dynamic_cast<static_init *>(node.get())) { line << "run static initializer 0x" << std::hex << initNode->funcAddress; } else if (auto initNode = dynamic_cast<apply_fixups *>(node.get())) { line << "apply fixups"; } else if (auto dlcloseNode = dynamic_cast<dlclose *>(node.get())) { line << "dlclose(0x" << std::hex << dlcloseNode->handle << ") -> " << dlcloseNode->result; } else if (auto dladdrNode = dynamic_cast<dladdr *>(node.get())) { line << "dladdr(0x" << dladdrNode->address << ") -> image: 0x" << std::hex << dladdrNode->imageAddress; line << ", symbol: 0x" << dladdrNode->symbolAddress; } else if (auto addImageNode = dynamic_cast<add_image_callback *>(node.get())) { line << std::hex << "add image callback(0x" << addImageNode->funcAddress << ") for image 0x" << addImageNode->libraryAddress; } else if (auto removeImageNode = dynamic_cast<remove_image_callback *>(node.get())) { line << std::hex << "remove image callback(0x" << removeImageNode->funcAddress << ") for image 0x" << removeImageNode->libraryAddress; } else if (auto objcInitNode = dynamic_cast<objc_image_init *>(node.get())) { line << std::hex << "objC init image(0x" << objcInitNode->libraryAddress << ")"; } else if (auto objcMapNode = dynamic_cast<objc_images_map *>(node.get())) { line << std::hex << "objC map images callback"; } if (width > MAXCOLS) { extended = true; } std::string timestampStr = timestamp(node, extended); std::string lineStr = line.str(); std::string commandStr = process(node, extended); std::string durationStr = duration(node); size_t lineMax = (size_t)width - (timestampStr.length() + commandStr.length() + durationStr.length() + 2*(size_t)depth + 3); lineStr.resize(lineMax, ' '); sstr << timestampStr << " "; std::fill_n(std::ostream_iterator<char>(sstr), 2*depth, ' '); sstr << lineStr << " " << durationStr << " " << commandStr << std::endl; for (const auto& child : node->children()) { outputConsole(child, width, sstr, depth+1); } } void outputJSON(std::shared_ptr<event_pair> node, std::ostringstream& sstr) { if (auto dlopenNode = dynamic_cast<dlopen *>(node.get())) { sstr << std::hex; sstr << "{\"type\":\"dlopen\",\"path\":\"" << dlopenNode->path << "\",\"flags\":\"0x" << dlopenNode->flags << "\""; sstr << ",\"result\":\"" << dlopenNode->result << "\""; } else if (auto dlopenPreflightNode = dynamic_cast<dlopen_preflight *>(node.get())) { sstr << std::hex; sstr << "{\"type\":\"dlopen_preflight\",\"path\":\"" << dlopenPreflightNode->path << "\""; sstr << ",\"result\":\"" << dlopenPreflightNode->result << "\""; } else if (auto dlsymNode = dynamic_cast<dlsym *>(node.get())) { sstr << std::hex << "{\"type\":\"dlsym\",\"symbol\":\"" << dlsymNode->symbol << "\",\"handle\":\"0x"; sstr << dlsymNode->handle << "\",\"result\":\"0x" << dlsymNode->result << "\""; } else if (auto mapImageNode = dynamic_cast<map_image *>(node.get())) { sstr << std::hex; sstr << "{\"type\":\"map_image\",\"path\":\"" << mapImageNode->path << "\",\"result\":\"0x" << mapImageNode->result << "\""; } else if (auto sigNode = dynamic_cast<attach_signature *>(node.get())) { sstr << "{\"type\":\"attach_codesignature\""; } else if (auto buildClosureNode = dynamic_cast<build_closure *>(node.get())) { sstr << "{\"type\":\"build_closure\", \"state\":\"" << buildClosureNode->buildStateString() << "\""; } else if (auto launchNode = dynamic_cast<app_launch *>(node.get())) { sstr << std::hex; sstr << "{\"type\":\"app_launch\",\"address\":\"0x"; sstr << launchNode->address << "\",\"mode\":" << launchNode->launchMode << ""; } else if (auto initNode = dynamic_cast<static_init *>(node.get())) { sstr << std::hex; sstr << "{\"type\":\"static_init\",\"image_address\":\"0x" << initNode->libraryAddress; sstr << "\",\"function_address\":\"0x" << initNode->funcAddress << "\""; } else if (auto initNode = dynamic_cast<apply_fixups *>(node.get())) { sstr << "{\"type\":\"apply_fixups\""; } else if (auto dlcloseNode = dynamic_cast<dlclose *>(node.get())) { sstr << std::hex << "{\"type\":\"dlclose\",\"handle\":\"0x"; sstr << dlcloseNode->handle << "\",\"result\":\"0x" << dlcloseNode->result << "\""; } else if (auto dladdrNode = dynamic_cast<dladdr *>(node.get())) { sstr << std::hex << "{\"type\":\"dladdr\",\"address\":\"0x" << dladdrNode->address << "\",\"result\":\"0x"; sstr << dladdrNode->result << "\",\"symbol_address\":\"0x" << dladdrNode->symbolAddress; sstr << "\",\"image_address\":\"0x" << dladdrNode->imageAddress << "\""; } else { sstr << "{\"type\":\"unknown\""; } if (!node->children().empty()) { bool firstChild = true; sstr << ",\"children\":["; for (const auto& child : node->children()) { if (!firstChild) { sstr << ","; } firstChild = false; outputJSON(child, sstr); } sstr << "]"; } sstr << std::dec << ",\"start_nano\":\"" << mach_to_nano(node->startTimestamp()); sstr << "\",\"end_nano\":\"" << mach_to_nano(node->endTimestamp()) << "\"}"; } void outputTracingJSON(std::shared_ptr<event_pair> node, std::ostringstream& sstr) { auto emitEventInfo = [&](bool isStart) { if (auto dlopenNode = dynamic_cast<dlopen *>(node.get())) { sstr << "{\"name\": \"dlopen(" << dlopenNode->path << ")\", \"cat\": \"" << "dlopen" << "\""; } else if (auto dlopenPreflightNode = dynamic_cast<dlopen_preflight *>(node.get())) { sstr << "{\"name\": \"dlopen_preflight(" << dlopenPreflightNode->path << ")\", \"cat\": \"" << "dlopen_preflight" << "\""; } else if (auto dlsymNode = dynamic_cast<dlsym *>(node.get())) { sstr << "{\"name\": \"dlsym(" << dlsymNode->symbol << ")\", \"cat\": \"" << "dlsym" << "\""; } else if (auto mapImageNode = dynamic_cast<map_image *>(node.get())) { sstr << "{\"name\": \"map_image(" << mapImageNode->path << ")\", \"cat\": \"" << "map_image" << "\""; } else if (auto sigNode = dynamic_cast<attach_signature *>(node.get())) { sstr << "{\"name\": \"" << "attach_codesignature" << "\", \"cat\": \"" << "attach_codesignature" << "\""; } else if (auto buildClosureNode = dynamic_cast<build_closure *>(node.get())) { sstr << "{\"name\": \"" << "build_closure" << "\", \"cat\": \"" << "build_closure" << "\""; } else if (auto launchNode = dynamic_cast<app_launch *>(node.get())) { sstr << "{\"name\": \"" << "app_launch" << "\", \"cat\": \"" << "app_launch" << "\""; } else if (auto initNode = dynamic_cast<static_init *>(node.get())) { sstr << "{\"name\": \"" << "static_init" << "\", \"cat\": \"" << "static_init" << "\""; } else if (auto initNode = dynamic_cast<apply_fixups *>(node.get())) { sstr << "{\"name\": \"" << "apply_fixups" << "\", \"cat\": \"" << "apply_fixups" << "\""; } else if (auto dlcloseNode = dynamic_cast<dlclose *>(node.get())) { sstr << "{\"name\": \"" << "dlclose" << "\", \"cat\": \"" << "dlclose" << "\""; } else if (auto dladdrNode = dynamic_cast<dladdr *>(node.get())) { sstr << "{\"name\": \"" << "dladdr" << "\", \"cat\": \"" << "dladdr" << "\""; } else if (auto addImageNode = dynamic_cast<add_image_callback *>(node.get())) { sstr << "{\"name\": \"" << "add_image" << "\", \"cat\": \"" << "add_image" << "\""; } else if (auto removeImageNode = dynamic_cast<remove_image_callback *>(node.get())) { sstr << "{\"name\": \"" << "remove_image" << "\", \"cat\": \"" << "remove_image" << "\""; } else if (auto objcInitNode = dynamic_cast<objc_image_init *>(node.get())) { sstr << "{\"name\": \"" << "objc_init" << "\", \"cat\": \"" << "objc_init" << "\""; } else if (auto objcMapNode = dynamic_cast<objc_images_map *>(node.get())) { sstr << "{\"name\": \"" << "objc_map" << "\", \"cat\": \"" << "objc_map" << "\""; } else { sstr << "{\"name\": \"" << "unknown" << "\", \"cat\": \"" << node->eventCode() << "\""; } if (isStart) { sstr << ", \"ph\": \"B\", \"pid\": " << _pid << ", \"tid\": " << _threadid << ", \"ts\": " << mach_to_nano(node->startTimestamp()) << "},"; } else { sstr << ", \"ph\": \"E\", \"pid\": " << _pid << ", \"tid\": " << _threadid << ", \"ts\": " << mach_to_nano(node->endTimestamp()) << "}"; } }; emitEventInfo(true); emitEventInfo(false); if (!node->children().empty()) { for (const auto& child : node->children()) { sstr << ", "; outputTracingJSON(child, sstr); } } } const std::vector<std::shared_ptr<event_pair>>& rootEvents() const { return _rootEvents; } private: void output(std::shared_ptr<event_pair> root) { std::ostringstream ostream; if (JSON_flag) { ostream << "{\"command\":\"" << _commandName << "\",\"pid\":\"" << _pid << "\",\"thread\":\""; ostream << _threadid << "\", \"event\":"; outputJSON(root, ostream); ostream << "}" << std::endl; } else if (JSON_Tracing_flag) { _rootEvents.push_back(root); } else { outputConsole(root, columns, ostream, 0); } std::cout << ostream.str(); if (!RAW_flag) fflush(stdout); } struct dlopen : event_pair { dlopen(ktrace_event_t E) : event_pair(E), path(stringForID(E->arg2)), flags((int)E->arg3) {} std::string flagString() { std::vector<std::string> flagStrs; uint64_t flagCheck = 0; std::string flagString; if (flags & RTLD_LAZY) { flagStrs.push_back("RTLD_LAZY"); flagCheck |= RTLD_LAZY; } if (flags & RTLD_NOW) { flagStrs.push_back("RTLD_NOW"); flagCheck |= RTLD_NOW; } if (flags & RTLD_LOCAL) { flagStrs.push_back("RTLD_LOCAL"); flagCheck |= RTLD_LOCAL; } if (flags & RTLD_GLOBAL) { flagStrs.push_back("RTLD_GLOBAL"); flagCheck |= RTLD_GLOBAL; } if (flags & RTLD_NOLOAD) { flagStrs.push_back("RTLD_NOLOAD"); flagCheck |= RTLD_NOLOAD; } if (flags & RTLD_NODELETE) { flagStrs.push_back("RTLD_NODELETE"); flagCheck |= RTLD_NODELETE; } if (flags & RTLD_FIRST) { flagStrs.push_back("RTLD_FIRST"); flagCheck |= RTLD_FIRST; } if (flagCheck == flags) { for (auto& flagStr : flagStrs) { if (!flagString.empty()) { flagString += "|"; } flagString += flagStr; } } return flagString; } std::string path; int flags; uint64_t result; }; struct dlopen_preflight : event_pair { dlopen_preflight(ktrace_event_t E) : event_pair(E), path(stringForID(E->arg2)) {} std::string path; uint64_t result; }; struct dlsym : event_pair { dlsym(ktrace_event_t E) : event_pair(E), handle(E->arg2), symbol(stringForID(E->arg3)) {} std::string symbol; uint64_t handle; uint64_t result; }; struct dladdr : event_pair { dladdr(ktrace_event_t E) : event_pair(E), address(E->arg2), imageAddress(0), symbolAddress(0) {} uint64_t address; uint64_t imageAddress; uint64_t symbolAddress; int result; }; struct dlclose : event_pair { dlclose(ktrace_event_t E) : event_pair(E), handle(E->arg2) {} uint64_t handle; int result; }; struct app_launch : event_pair { app_launch(ktrace_event_t E) : event_pair(E), address(E->arg2) {} uint64_t address; uint64_t launchMode; std::vector<event_pair *> _children; }; struct static_init : event_pair { static_init(ktrace_event_t E) : event_pair(E), libraryAddress(E->arg2), funcAddress(E->arg3) {} uint64_t libraryAddress; uint64_t funcAddress; }; struct map_image : event_pair { map_image(ktrace_event_t E) : event_pair(E), path(stringForID(E->arg2)) {} std::string path; uint64_t result; }; struct apply_fixups : event_pair { apply_fixups(ktrace_event_t E) : event_pair(E) {} }; struct attach_signature : event_pair { attach_signature(ktrace_event_t E) : event_pair(E) {} }; struct build_closure : event_pair { build_closure(ktrace_event_t E) : event_pair(E), closureBuildState(0) {} uint64_t closureBuildState; std::string buildStateString() const { switch ((dyld3::DyldTimingBuildClosure)closureBuildState) { case dyld3::DyldTimingBuildClosure::ClosureBuildFailure: return "failed to build closure"; case dyld3::DyldTimingBuildClosure::LaunchClosure_Built: return "built launch closure"; case dyld3::DyldTimingBuildClosure::DlopenClosure_UsedSharedCacheDylib: return "used shared cache dylib closure"; case dyld3::DyldTimingBuildClosure::DlopenClosure_UsedSharedCacheOther: return "used shared cache dlopen closure"; case dyld3::DyldTimingBuildClosure::DlopenClosure_NoLoad: return "dlopen was no load"; case dyld3::DyldTimingBuildClosure::DlopenClosure_Built: return "built dlopen closure"; } }; }; struct add_image_callback : event_pair { add_image_callback(ktrace_event_t E) : event_pair(E), libraryAddress(E->arg2), funcAddress(E->arg3) {} uint64_t libraryAddress; uint64_t funcAddress; }; struct remove_image_callback : event_pair { remove_image_callback(ktrace_event_t E) : event_pair(E), libraryAddress(E->arg2), funcAddress(E->arg3) {} uint64_t libraryAddress; uint64_t funcAddress; }; struct objc_image_init : event_pair { objc_image_init(ktrace_event_t E) : event_pair(E), libraryAddress(E->arg2) {} uint64_t libraryAddress; }; struct objc_images_map : event_pair { objc_images_map(ktrace_event_t E) : event_pair(E) {} }; std::shared_ptr<event_pair> _currentRootEvent; std::vector<std::shared_ptr<event_pair>> _eventStack; std::vector<std::shared_ptr<event_pair>> _rootEvents; }; struct OutputManager { std::map<unsigned long, std::unique_ptr<output_renderer>> sOutputRenders; void flush() { if (JSON_Tracing_flag) { std::ostringstream ostream; ostream << "{\"displayTimeUnit\":\"ns\""; ostream << ", \"traceEvents\": ["; bool firstEvent = true; for (const auto& renderer : sOutputRenders) { for (const auto& root : renderer.second->rootEvents()) { if (firstEvent) firstEvent = false; else ostream << ", "; renderer.second->outputTracingJSON(root, ostream); } } ostream << "]"; ostream << "}" << std::endl; std::cout << ostream.str(); if (!RAW_flag) fflush(stdout); } } }; static OutputManager sOutputManager; void setup_ktrace_callbacks(void) { ktrace_events_single(s, TRACEDBG_CODE(DBG_TRACE_STRING, TRACE_STRING_GLOBAL), ^(ktrace_event_t event){ char argChars[33] = {0}; memset(&argChars[0], 0, 33); if ((event->debugid & DBG_FUNC_START) == DBG_FUNC_START) { uint64_t str_id = event->arg2; if (((event->debugid & DBG_FUNC_END) == DBG_FUNC_END) && str_id != 0) { auto i = gActiveStrings.find(str_id); if (i != gActiveStrings.end()) { gActiveStrings.erase(i); } } *((uint64_t*)&argChars[0]) = event->arg3; *((uint64_t*)&argChars[8]) = event->arg4; gActiveStringIDs.insert(std::make_pair(event->threadid, str_id)); gActiveStrings.insert(std::make_pair(str_id, argChars)); } else { // Not a start, so lets grab our data *((uint64_t*)&argChars[0]) = event->arg1; *((uint64_t*)&argChars[8]) = event->arg2; *((uint64_t*)&argChars[16]) = event->arg3; *((uint64_t*)&argChars[24]) = event->arg4; auto i = gActiveStringIDs.find(event->threadid); if (i != gActiveStringIDs.end()) { auto j = gActiveStrings.find(i->second); if (j != gActiveStrings.end()) { j->second += argChars; } } } if ((event->debugid & DBG_FUNC_END) == DBG_FUNC_END) { auto i = gActiveStringIDs.find(event->threadid); if (i != gActiveStringIDs.end()) { gActiveStringIDs.erase(i); } }; }); // Event though our events are paired, we process them individually so we can // render nested events ktrace_events_range(s, KDBG_EVENTID(DBG_DYLD, DBG_DYLD_INTERNAL_SUBCLASS, 0), KDBG_EVENTID(DBG_DYLD, DBG_DYLD_API_SUBCLASS+1, 0), ^(ktrace_event_t event){ if ((event->debugid & KDBG_FUNC_MASK) == 0) return; auto i = sOutputManager.sOutputRenders.find((size_t)(event->threadid)); if (i == sOutputManager.sOutputRenders.end()) { sOutputManager.sOutputRenders.emplace(std::make_pair(event->threadid, std::make_unique<output_renderer>(s, event))); i = sOutputManager.sOutputRenders.find((size_t)(event->threadid)); } i->second->recordEvent(event); if (i->second->empty()) { sOutputManager.sOutputRenders.erase(i); } }); } int main(int argc, char *argv[]) { char ch; int rv = 0; bool exclude_pids = false; uint64_t time_limit_ns = 0; get_screenwidth(); s = ktrace_session_create(); assert(s); while ((ch = getopt(argc, argv, "jJeR:t:")) != -1) { switch (ch) { case 'j': JSON_flag = true; break; case 'J': JSON_Tracing_flag = true; break; case 'e': exclude_pids = true; break; case 't': time_limit_ns = (uint64_t)(NSEC_PER_SEC * atof(optarg)); if (time_limit_ns == 0) { fprintf(stderr, "ERROR: could not set time limit to %s\n", optarg); exit(1); } break; case 'R': RAW_flag = true; rv = ktrace_set_file(s, optarg); if (rv) { fprintf(stderr, "ERROR: reading trace from '%s' failed (%s)\n", optarg, strerror(errno)); exit(1); } break; default: exit_usage(); } } argc -= optind; argv += optind; if (time_limit_ns > 0) { if (RAW_flag) { fprintf(stderr, "NOTE: time limit ignored when a raw file is specified\n"); } else { dispatch_after(dispatch_time(DISPATCH_TIME_NOW, time_limit_ns), dispatch_get_global_queue(QOS_CLASS_USER_INITIATED, 0), ^{ ktrace_end(s, 0); }); } } if (!RAW_flag) { if (geteuid() != 0) { fprintf(stderr, "'dyld_usage' must be run as root...\n"); exit(1); } /* * ktrace can't both *in*clude and *ex*clude pids, so: if we are * already excluding pids, or if we are not explicitly including * or excluding any pids, then exclude the defaults. * * if on the other hand we are explicitly including pids, we'll * filter the defaults out naturally. */ if (exclude_pids || argc == 0) { ktrace_exclude_process(s, "dyld_usage"); ktrace_exclude_process(s, "Terminal"); ktrace_exclude_process(s, "telnetd"); ktrace_exclude_process(s, "telnet"); ktrace_exclude_process(s, "sshd"); ktrace_exclude_process(s, "rlogind"); ktrace_exclude_process(s, "tcsh"); ktrace_exclude_process(s, "csh"); ktrace_exclude_process(s, "sh"); ktrace_exclude_process(s, "zsh"); #if TARGET_OS_EMBEDDED ktrace_exclude_process(s, "dropbear"); #endif /* TARGET_OS_EMBEDDED */ } } /* * Process the list of specified pids, and in/exclude them as * appropriate. */ while (argc > 0) { pid_t pid; char *name; char *endptr; name = argv[0]; pid = (pid_t)strtoul(name, &endptr, 10); if (*name != '\0' && *endptr == '\0') { if (exclude_pids) { rv = ktrace_exclude_pid(s, pid); } else { if (pid != 0) rv = ktrace_filter_pid(s, pid); } } else { if (exclude_pids) { rv = ktrace_exclude_process(s, name); } else { if (strcmp(name, "kernel_task")) rv = ktrace_filter_process(s, name); } } if (rv == EINVAL) { fprintf(stderr, "ERROR: cannot both include and exclude simultaneously\n"); exit(1); } else { assert(!rv); } argc--; argv++; } /* provides SIGINT, SIGHUP, SIGPIPE, SIGTERM handlers */ ktrace_set_signal_handler(s); ktrace_set_completion_handler(s, ^{ sOutputManager.flush(); exit(0); }); signal(SIGWINCH, SIG_IGN); sigwinch_source = dispatch_source_create(DISPATCH_SOURCE_TYPE_SIGNAL, SIGWINCH, 0, dispatch_get_main_queue()); dispatch_source_set_event_handler(sigwinch_source, ^{ get_screenwidth(); }); dispatch_activate(sigwinch_source); setup_ktrace_callbacks(); ktrace_set_dropped_events_handler(s, ^{ fprintf(stderr, "dyld_usage: buffer overrun, events generated too quickly\n"); /* clear any state that is now potentially invalid */ }); ktrace_set_execnames_enabled(s, KTRACE_FEATURE_LAZY); ktrace_set_vnode_paths_enabled(s, false); /* no need to symbolicate addresses */ ktrace_set_uuid_map_enabled(s, KTRACE_FEATURE_DISABLED); rv = ktrace_start(s, dispatch_get_main_queue()); if (rv) { perror("ktrace_start"); exit(1); } dispatch_main(); return 0; } |