1 //===-- DynamicLoaderMacOSXDYLD.cpp -----------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "lldb/Breakpoint/StoppointCallbackContext.h" 11 #include "lldb/Core/DataBuffer.h" 12 #include "lldb/Core/DataBufferHeap.h" 13 #include "lldb/Core/Debugger.h" 14 #include "lldb/Core/Log.h" 15 #include "lldb/Core/Module.h" 16 #include "lldb/Core/ModuleSpec.h" 17 #include "lldb/Core/PluginManager.h" 18 #include "lldb/Core/Section.h" 19 #include "lldb/Core/State.h" 20 #include "lldb/Symbol/ClangASTContext.h" 21 #include "lldb/Symbol/Function.h" 22 #include "lldb/Symbol/ObjectFile.h" 23 #include "lldb/Target/ObjCLanguageRuntime.h" 24 #include "lldb/Target/ABI.h" 25 #include "lldb/Target/RegisterContext.h" 26 #include "lldb/Target/Target.h" 27 #include "lldb/Target/Thread.h" 28 #include "lldb/Target/ThreadPlanRunToAddress.h" 29 #include "lldb/Target/StackFrame.h" 30 31 #include "DynamicLoaderMacOSXDYLD.h" 32 #include "DynamicLoaderDarwin.h" 33 34 //#define ENABLE_DEBUG_PRINTF // COMMENT THIS LINE OUT PRIOR TO CHECKIN 35 #ifdef ENABLE_DEBUG_PRINTF 36 #include <stdio.h> 37 #define DEBUG_PRINTF(fmt, ...) printf(fmt, ## __VA_ARGS__) 38 #else 39 #define DEBUG_PRINTF(fmt, ...) 40 #endif 41 42 #ifndef __APPLE__ 43 #include "Utility/UuidCompatibility.h" 44 #else 45 #include <uuid/uuid.h> 46 #endif 47 48 using namespace lldb; 49 using namespace lldb_private; 50 51 52 //---------------------------------------------------------------------- 53 // Create an instance of this class. This function is filled into 54 // the plugin info class that gets handed out by the plugin factory and 55 // allows the lldb to instantiate an instance of this class. 56 //---------------------------------------------------------------------- 57 DynamicLoader * 58 DynamicLoaderMacOSXDYLD::CreateInstance (Process* process, bool force) 59 { 60 bool create = force; 61 if (!create) 62 { 63 create = true; 64 Module* exe_module = process->GetTarget().GetExecutableModulePointer(); 65 if (exe_module) 66 { 67 ObjectFile *object_file = exe_module->GetObjectFile(); 68 if (object_file) 69 { 70 create = (object_file->GetStrata() == ObjectFile::eStrataUser); 71 } 72 } 73 74 if (create) 75 { 76 const llvm::Triple &triple_ref = process->GetTarget().GetArchitecture().GetTriple(); 77 switch (triple_ref.getOS()) 78 { 79 case llvm::Triple::Darwin: 80 case llvm::Triple::MacOSX: 81 case llvm::Triple::IOS: 82 case llvm::Triple::TvOS: 83 case llvm::Triple::WatchOS: 84 create = triple_ref.getVendor() == llvm::Triple::Apple; 85 break; 86 default: 87 create = false; 88 break; 89 } 90 } 91 } 92 93 if (create) 94 return new DynamicLoaderMacOSXDYLD (process); 95 return NULL; 96 } 97 98 //---------------------------------------------------------------------- 99 // Constructor 100 //---------------------------------------------------------------------- 101 DynamicLoaderMacOSXDYLD::DynamicLoaderMacOSXDYLD (Process* process) : 102 DynamicLoaderDarwin(process), 103 m_dyld_all_image_infos_addr(LLDB_INVALID_ADDRESS), 104 m_dyld_all_image_infos(), 105 m_dyld_all_image_infos_stop_id (UINT32_MAX), 106 m_break_id(LLDB_INVALID_BREAK_ID), 107 m_mutex(), 108 m_process_image_addr_is_all_images_infos (false) 109 { 110 } 111 112 //---------------------------------------------------------------------- 113 // Destructor 114 //---------------------------------------------------------------------- 115 DynamicLoaderMacOSXDYLD::~DynamicLoaderMacOSXDYLD() 116 { 117 if (LLDB_BREAK_ID_IS_VALID(m_break_id)) 118 m_process->GetTarget().RemoveBreakpointByID (m_break_id); 119 } 120 121 bool 122 DynamicLoaderMacOSXDYLD::ProcessDidExec () 123 { 124 std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); 125 bool did_exec = false; 126 if (m_process) 127 { 128 // If we are stopped after an exec, we will have only one thread... 129 if (m_process->GetThreadList().GetSize() == 1) 130 { 131 // We know if a process has exec'ed if our "m_dyld_all_image_infos_addr" 132 // value differs from the Process' image info address. When a process 133 // execs itself it might cause a change if ASLR is enabled. 134 const addr_t shlib_addr = m_process->GetImageInfoAddress (); 135 if (m_process_image_addr_is_all_images_infos == true && shlib_addr != m_dyld_all_image_infos_addr) 136 { 137 // The image info address from the process is the 'dyld_all_image_infos' 138 // address and it has changed. 139 did_exec = true; 140 } 141 else if (m_process_image_addr_is_all_images_infos == false && shlib_addr == m_dyld.address) 142 { 143 // The image info address from the process is the mach_header 144 // address for dyld and it has changed. 145 did_exec = true; 146 } 147 else 148 { 149 // ASLR might be disabled and dyld could have ended up in the same 150 // location. We should try and detect if we are stopped at '_dyld_start' 151 ThreadSP thread_sp(m_process->GetThreadList().GetThreadAtIndex(0)); 152 if (thread_sp) 153 { 154 lldb::StackFrameSP frame_sp(thread_sp->GetStackFrameAtIndex(0)); 155 if (frame_sp) 156 { 157 const Symbol *symbol = frame_sp->GetSymbolContext(eSymbolContextSymbol).symbol; 158 if (symbol) 159 { 160 if (symbol->GetName() == ConstString("_dyld_start")) 161 did_exec = true; 162 } 163 } 164 } 165 } 166 167 if (did_exec) 168 { 169 m_libpthread_module_wp.reset(); 170 m_pthread_getspecific_addr.Clear(); 171 } 172 } 173 } 174 return did_exec; 175 } 176 177 //---------------------------------------------------------------------- 178 // Clear out the state of this class. 179 //---------------------------------------------------------------------- 180 void 181 DynamicLoaderMacOSXDYLD::DoClear () 182 { 183 std::lock_guard<std::recursive_mutex> guard(m_mutex); 184 185 if (LLDB_BREAK_ID_IS_VALID(m_break_id)) 186 m_process->GetTarget().RemoveBreakpointByID (m_break_id); 187 188 m_dyld_all_image_infos_addr = LLDB_INVALID_ADDRESS; 189 m_dyld_all_image_infos.Clear(); 190 m_break_id = LLDB_INVALID_BREAK_ID; 191 } 192 193 //---------------------------------------------------------------------- 194 // Check if we have found DYLD yet 195 //---------------------------------------------------------------------- 196 bool 197 DynamicLoaderMacOSXDYLD::DidSetNotificationBreakpoint() 198 { 199 return LLDB_BREAK_ID_IS_VALID (m_break_id); 200 } 201 202 void 203 DynamicLoaderMacOSXDYLD::ClearNotificationBreakpoint () 204 { 205 if (LLDB_BREAK_ID_IS_VALID (m_break_id)) 206 { 207 m_process->GetTarget().RemoveBreakpointByID (m_break_id); 208 } 209 } 210 211 //---------------------------------------------------------------------- 212 // Try and figure out where dyld is by first asking the Process 213 // if it knows (which currently calls down in the lldb::Process 214 // to get the DYLD info (available on SnowLeopard only). If that fails, 215 // then check in the default addresses. 216 //---------------------------------------------------------------------- 217 void 218 DynamicLoaderMacOSXDYLD::DoInitialImageFetch() 219 { 220 if (m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS) 221 { 222 // Check the image info addr as it might point to the 223 // mach header for dyld, or it might point to the 224 // dyld_all_image_infos struct 225 const addr_t shlib_addr = m_process->GetImageInfoAddress (); 226 if (shlib_addr != LLDB_INVALID_ADDRESS) 227 { 228 ByteOrder byte_order = m_process->GetTarget().GetArchitecture().GetByteOrder(); 229 uint8_t buf[4]; 230 DataExtractor data (buf, sizeof(buf), byte_order, 4); 231 Error error; 232 if (m_process->ReadMemory (shlib_addr, buf, 4, error) == 4) 233 { 234 lldb::offset_t offset = 0; 235 uint32_t magic = data.GetU32 (&offset); 236 switch (magic) 237 { 238 case llvm::MachO::MH_MAGIC: 239 case llvm::MachO::MH_MAGIC_64: 240 case llvm::MachO::MH_CIGAM: 241 case llvm::MachO::MH_CIGAM_64: 242 m_process_image_addr_is_all_images_infos = false; 243 ReadDYLDInfoFromMemoryAndSetNotificationCallback(shlib_addr); 244 return; 245 246 default: 247 break; 248 } 249 } 250 // Maybe it points to the all image infos? 251 m_dyld_all_image_infos_addr = shlib_addr; 252 m_process_image_addr_is_all_images_infos = true; 253 } 254 } 255 256 if (m_dyld_all_image_infos_addr != LLDB_INVALID_ADDRESS) 257 { 258 if (ReadAllImageInfosStructure ()) 259 { 260 if (m_dyld_all_image_infos.dyldImageLoadAddress != LLDB_INVALID_ADDRESS) 261 ReadDYLDInfoFromMemoryAndSetNotificationCallback (m_dyld_all_image_infos.dyldImageLoadAddress); 262 else 263 ReadDYLDInfoFromMemoryAndSetNotificationCallback (m_dyld_all_image_infos_addr & 0xfffffffffff00000ull); 264 return; 265 } 266 } 267 268 // Check some default values 269 Module *executable = m_process->GetTarget().GetExecutableModulePointer(); 270 271 if (executable) 272 { 273 const ArchSpec &exe_arch = executable->GetArchitecture(); 274 if (exe_arch.GetAddressByteSize() == 8) 275 { 276 ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x7fff5fc00000ull); 277 } 278 else if (exe_arch.GetMachine() == llvm::Triple::arm || exe_arch.GetMachine() == llvm::Triple::thumb || exe_arch.GetMachine() == llvm::Triple::aarch64) 279 { 280 ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x2fe00000); 281 } 282 else 283 { 284 ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x8fe00000); 285 } 286 } 287 return; 288 } 289 290 //---------------------------------------------------------------------- 291 // Assume that dyld is in memory at ADDR and try to parse it's load 292 // commands 293 //---------------------------------------------------------------------- 294 bool 295 DynamicLoaderMacOSXDYLD::ReadDYLDInfoFromMemoryAndSetNotificationCallback(lldb::addr_t addr) 296 { 297 std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); 298 DataExtractor data; // Load command data 299 if (ReadMachHeader (addr, &m_dyld.header, &data)) 300 { 301 if (m_dyld.header.filetype == llvm::MachO::MH_DYLINKER) 302 { 303 m_dyld.address = addr; 304 ModuleSP dyld_module_sp; 305 if (ParseLoadCommands (data, m_dyld, &m_dyld.file_spec)) 306 { 307 if (m_dyld.file_spec) 308 { 309 UpdateDYLDImageInfoFromNewImageInfo (m_dyld); 310 311 } 312 } 313 dyld_module_sp = GetDYLDModule(); 314 315 Target &target = m_process->GetTarget(); 316 317 if (m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS && dyld_module_sp.get()) 318 { 319 static ConstString g_dyld_all_image_infos ("dyld_all_image_infos"); 320 const Symbol *symbol = dyld_module_sp->FindFirstSymbolWithNameAndType (g_dyld_all_image_infos, eSymbolTypeData); 321 if (symbol) 322 m_dyld_all_image_infos_addr = symbol->GetLoadAddress(&target); 323 } 324 325 // Update all image infos 326 InitializeFromAllImageInfos (); 327 328 // If we didn't have an executable before, but now we do, then the 329 // dyld module shared pointer might be unique and we may need to add 330 // it again (since Target::SetExecutableModule() will clear the 331 // images). So append the dyld module back to the list if it is 332 /// unique! 333 if (dyld_module_sp) 334 { 335 target.GetImages().AppendIfNeeded (dyld_module_sp); 336 337 // At this point we should have read in dyld's module, and so we should set breakpoints in it: 338 ModuleList modules; 339 modules.Append(dyld_module_sp); 340 target.ModulesDidLoad(modules); 341 SetDYLDModule (dyld_module_sp); 342 } 343 return true; 344 } 345 } 346 return false; 347 } 348 349 bool 350 DynamicLoaderMacOSXDYLD::NeedToDoInitialImageFetch () 351 { 352 return m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS; 353 } 354 355 //---------------------------------------------------------------------- 356 // Static callback function that gets called when our DYLD notification 357 // breakpoint gets hit. We update all of our image infos and then 358 // let our super class DynamicLoader class decide if we should stop 359 // or not (based on global preference). 360 //---------------------------------------------------------------------- 361 bool 362 DynamicLoaderMacOSXDYLD::NotifyBreakpointHit (void *baton, 363 StoppointCallbackContext *context, 364 lldb::user_id_t break_id, 365 lldb::user_id_t break_loc_id) 366 { 367 // Let the event know that the images have changed 368 // DYLD passes three arguments to the notification breakpoint. 369 // Arg1: enum dyld_image_mode mode - 0 = adding, 1 = removing 370 // Arg2: uint32_t infoCount - Number of shared libraries added 371 // Arg3: dyld_image_info info[] - Array of structs of the form: 372 // const struct mach_header *imageLoadAddress 373 // const char *imageFilePath 374 // uintptr_t imageFileModDate (a time_t) 375 376 DynamicLoaderMacOSXDYLD* dyld_instance = (DynamicLoaderMacOSXDYLD*) baton; 377 378 // First step is to see if we've already initialized the all image infos. If we haven't then this function 379 // will do so and return true. In the course of initializing the all_image_infos it will read the complete 380 // current state, so we don't need to figure out what has changed from the data passed in to us. 381 382 ExecutionContext exe_ctx (context->exe_ctx_ref); 383 Process *process = exe_ctx.GetProcessPtr(); 384 385 // This is a sanity check just in case this dyld_instance is an old dyld plugin's breakpoint still lying around. 386 if (process != dyld_instance->m_process) 387 return false; 388 389 if (dyld_instance->InitializeFromAllImageInfos()) 390 return dyld_instance->GetStopWhenImagesChange(); 391 392 const lldb::ABISP &abi = process->GetABI(); 393 if (abi) 394 { 395 // Build up the value array to store the three arguments given above, then get the values from the ABI: 396 397 ClangASTContext *clang_ast_context = process->GetTarget().GetScratchClangASTContext(); 398 ValueList argument_values; 399 Value input_value; 400 401 CompilerType clang_void_ptr_type = clang_ast_context->GetBasicType(eBasicTypeVoid).GetPointerType(); 402 CompilerType clang_uint32_type = clang_ast_context->GetBuiltinTypeForEncodingAndBitSize(lldb::eEncodingUint, 32); 403 input_value.SetValueType (Value::eValueTypeScalar); 404 input_value.SetCompilerType (clang_uint32_type); 405 // input_value.SetContext (Value::eContextTypeClangType, clang_uint32_type); 406 argument_values.PushValue (input_value); 407 argument_values.PushValue (input_value); 408 input_value.SetCompilerType (clang_void_ptr_type); 409 // input_value.SetContext (Value::eContextTypeClangType, clang_void_ptr_type); 410 argument_values.PushValue (input_value); 411 412 if (abi->GetArgumentValues (exe_ctx.GetThreadRef(), argument_values)) 413 { 414 uint32_t dyld_mode = argument_values.GetValueAtIndex(0)->GetScalar().UInt (-1); 415 if (dyld_mode != static_cast<uint32_t>(-1)) 416 { 417 // Okay the mode was right, now get the number of elements, and the array of new elements... 418 uint32_t image_infos_count = argument_values.GetValueAtIndex(1)->GetScalar().UInt (-1); 419 if (image_infos_count != static_cast<uint32_t>(-1)) 420 { 421 // Got the number added, now go through the array of added elements, putting out the mach header 422 // address, and adding the image. 423 // Note, I'm not putting in logging here, since the AddModules & RemoveModules functions do 424 // all the logging internally. 425 426 lldb::addr_t image_infos_addr = argument_values.GetValueAtIndex(2)->GetScalar().ULongLong(); 427 if (dyld_mode == 0) 428 { 429 // This is add: 430 dyld_instance->AddModulesUsingImageInfosAddress (image_infos_addr, image_infos_count); 431 } 432 else 433 { 434 // This is remove: 435 dyld_instance->RemoveModulesUsingImageInfosAddress (image_infos_addr, image_infos_count); 436 } 437 438 } 439 } 440 } 441 } 442 else 443 { 444 process->GetTarget().GetDebugger().GetAsyncErrorStream()->Printf("No ABI plugin located for triple %s -- shared libraries will not be registered!\n", process->GetTarget().GetArchitecture().GetTriple().getTriple().c_str()); 445 } 446 447 // Return true to stop the target, false to just let the target run 448 return dyld_instance->GetStopWhenImagesChange(); 449 } 450 451 bool 452 DynamicLoaderMacOSXDYLD::ReadAllImageInfosStructure () 453 { 454 std::lock_guard<std::recursive_mutex> guard(m_mutex); 455 456 // the all image infos is already valid for this process stop ID 457 if (m_process->GetStopID() == m_dyld_all_image_infos_stop_id) 458 return true; 459 460 m_dyld_all_image_infos.Clear(); 461 if (m_dyld_all_image_infos_addr != LLDB_INVALID_ADDRESS) 462 { 463 ByteOrder byte_order = m_process->GetTarget().GetArchitecture().GetByteOrder(); 464 uint32_t addr_size = 4; 465 if (m_dyld_all_image_infos_addr > UINT32_MAX) 466 addr_size = 8; 467 468 uint8_t buf[256]; 469 DataExtractor data (buf, sizeof(buf), byte_order, addr_size); 470 lldb::offset_t offset = 0; 471 472 const size_t count_v2 = sizeof (uint32_t) + // version 473 sizeof (uint32_t) + // infoArrayCount 474 addr_size + // infoArray 475 addr_size + // notification 476 addr_size + // processDetachedFromSharedRegion + libSystemInitialized + pad 477 addr_size; // dyldImageLoadAddress 478 const size_t count_v11 = count_v2 + 479 addr_size + // jitInfo 480 addr_size + // dyldVersion 481 addr_size + // errorMessage 482 addr_size + // terminationFlags 483 addr_size + // coreSymbolicationShmPage 484 addr_size + // systemOrderFlag 485 addr_size + // uuidArrayCount 486 addr_size + // uuidArray 487 addr_size + // dyldAllImageInfosAddress 488 addr_size + // initialImageCount 489 addr_size + // errorKind 490 addr_size + // errorClientOfDylibPath 491 addr_size + // errorTargetDylibPath 492 addr_size; // errorSymbol 493 const size_t count_v13 = count_v11 + 494 addr_size + // sharedCacheSlide 495 sizeof (uuid_t); // sharedCacheUUID 496 UNUSED_IF_ASSERT_DISABLED(count_v13); 497 assert (sizeof (buf) >= count_v13); 498 499 Error error; 500 if (m_process->ReadMemory (m_dyld_all_image_infos_addr, buf, 4, error) == 4) 501 { 502 m_dyld_all_image_infos.version = data.GetU32(&offset); 503 // If anything in the high byte is set, we probably got the byte 504 // order incorrect (the process might not have it set correctly 505 // yet due to attaching to a program without a specified file). 506 if (m_dyld_all_image_infos.version & 0xff000000) 507 { 508 // We have guessed the wrong byte order. Swap it and try 509 // reading the version again. 510 if (byte_order == eByteOrderLittle) 511 byte_order = eByteOrderBig; 512 else 513 byte_order = eByteOrderLittle; 514 515 data.SetByteOrder (byte_order); 516 offset = 0; 517 m_dyld_all_image_infos.version = data.GetU32(&offset); 518 } 519 } 520 else 521 { 522 return false; 523 } 524 525 const size_t count = (m_dyld_all_image_infos.version >= 11) ? count_v11 : count_v2; 526 527 const size_t bytes_read = m_process->ReadMemory (m_dyld_all_image_infos_addr, buf, count, error); 528 if (bytes_read == count) 529 { 530 offset = 0; 531 m_dyld_all_image_infos.version = data.GetU32(&offset); 532 m_dyld_all_image_infos.dylib_info_count = data.GetU32(&offset); 533 m_dyld_all_image_infos.dylib_info_addr = data.GetPointer(&offset); 534 m_dyld_all_image_infos.notification = data.GetPointer(&offset); 535 m_dyld_all_image_infos.processDetachedFromSharedRegion = data.GetU8(&offset); 536 m_dyld_all_image_infos.libSystemInitialized = data.GetU8(&offset); 537 // Adjust for padding. 538 offset += addr_size - 2; 539 m_dyld_all_image_infos.dyldImageLoadAddress = data.GetPointer(&offset); 540 if (m_dyld_all_image_infos.version >= 11) 541 { 542 offset += addr_size * 8; 543 uint64_t dyld_all_image_infos_addr = data.GetPointer(&offset); 544 545 // When we started, we were given the actual address of the all_image_infos 546 // struct (probably via TASK_DYLD_INFO) in memory - this address is stored in 547 // m_dyld_all_image_infos_addr and is the most accurate address we have. 548 549 // We read the dyld_all_image_infos struct from memory; it contains its own address. 550 // If the address in the struct does not match the actual address, 551 // the dyld we're looking at has been loaded at a different location (slid) from 552 // where it intended to load. The addresses in the dyld_all_image_infos struct 553 // are the original, non-slid addresses, and need to be adjusted. Most importantly 554 // the address of dyld and the notification address need to be adjusted. 555 556 if (dyld_all_image_infos_addr != m_dyld_all_image_infos_addr) 557 { 558 uint64_t image_infos_offset = dyld_all_image_infos_addr - m_dyld_all_image_infos.dyldImageLoadAddress; 559 uint64_t notification_offset = m_dyld_all_image_infos.notification - m_dyld_all_image_infos.dyldImageLoadAddress; 560 m_dyld_all_image_infos.dyldImageLoadAddress = m_dyld_all_image_infos_addr - image_infos_offset; 561 m_dyld_all_image_infos.notification = m_dyld_all_image_infos.dyldImageLoadAddress + notification_offset; 562 } 563 } 564 m_dyld_all_image_infos_stop_id = m_process->GetStopID(); 565 return true; 566 } 567 } 568 return false; 569 } 570 571 572 bool 573 DynamicLoaderMacOSXDYLD::AddModulesUsingImageInfosAddress (lldb::addr_t image_infos_addr, uint32_t image_infos_count) 574 { 575 ImageInfo::collection image_infos; 576 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); 577 if (log) 578 log->Printf ("Adding %d modules.\n", image_infos_count); 579 580 std::lock_guard<std::recursive_mutex> guard(m_mutex); 581 std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); 582 if (m_process->GetStopID() == m_dyld_image_infos_stop_id) 583 return true; 584 585 StructuredData::ObjectSP image_infos_json_sp = m_process->GetLoadedDynamicLibrariesInfos (image_infos_addr, image_infos_count); 586 if (image_infos_json_sp.get() 587 && image_infos_json_sp->GetAsDictionary() 588 && image_infos_json_sp->GetAsDictionary()->HasKey("images") 589 && image_infos_json_sp->GetAsDictionary()->GetValueForKey("images")->GetAsArray() 590 && image_infos_json_sp->GetAsDictionary()->GetValueForKey("images")->GetAsArray()->GetSize() == image_infos_count) 591 { 592 bool return_value = false; 593 if (JSONImageInformationIntoImageInfo (image_infos_json_sp, image_infos)) 594 { 595 AddExecutableModuleIfInImageInfos (image_infos); 596 return_value = AddModulesUsingImageInfos (image_infos); 597 } 598 m_dyld_image_infos_stop_id = m_process->GetStopID(); 599 return return_value; 600 } 601 602 if (!ReadImageInfos (image_infos_addr, image_infos_count, image_infos)) 603 return false; 604 605 UpdateImageInfosHeaderAndLoadCommands (image_infos, image_infos_count, false); 606 bool return_value = AddModulesUsingImageInfos (image_infos); 607 m_dyld_image_infos_stop_id = m_process->GetStopID(); 608 return return_value; 609 } 610 611 bool 612 DynamicLoaderMacOSXDYLD::RemoveModulesUsingImageInfosAddress (lldb::addr_t image_infos_addr, uint32_t image_infos_count) 613 { 614 ImageInfo::collection image_infos; 615 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); 616 617 std::lock_guard<std::recursive_mutex> guard(m_mutex); 618 std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); 619 if (m_process->GetStopID() == m_dyld_image_infos_stop_id) 620 return true; 621 622 // First read in the image_infos for the removed modules, and their headers & load commands. 623 if (!ReadImageInfos (image_infos_addr, image_infos_count, image_infos)) 624 { 625 if (log) 626 log->PutCString ("Failed reading image infos array."); 627 return false; 628 } 629 630 if (log) 631 log->Printf ("Removing %d modules.", image_infos_count); 632 633 ModuleList unloaded_module_list; 634 for (uint32_t idx = 0; idx < image_infos.size(); ++idx) 635 { 636 if (log) 637 { 638 log->Printf ("Removing module at address=0x%16.16" PRIx64 ".", image_infos[idx].address); 639 image_infos[idx].PutToLog (log); 640 } 641 642 // Remove this image_infos from the m_all_image_infos. We do the comparison by address 643 // rather than by file spec because we can have many modules with the same "file spec" in the 644 // case that they are modules loaded from memory. 645 // 646 // Also copy over the uuid from the old entry to the removed entry so we can 647 // use it to lookup the module in the module list. 648 649 ImageInfo::collection::iterator pos, end = m_dyld_image_infos.end(); 650 for (pos = m_dyld_image_infos.begin(); pos != end; pos++) 651 { 652 if (image_infos[idx].address == (*pos).address) 653 { 654 image_infos[idx].uuid = (*pos).uuid; 655 656 // Add the module from this image_info to the "unloaded_module_list". We'll remove them all at 657 // one go later on. 658 659 ModuleSP unload_image_module_sp (FindTargetModuleForImageInfo (image_infos[idx], false, NULL)); 660 if (unload_image_module_sp.get()) 661 { 662 // When we unload, be sure to use the image info from the old list, 663 // since that has sections correctly filled in. 664 UnloadModuleSections (unload_image_module_sp.get(), *pos); 665 unloaded_module_list.AppendIfNeeded (unload_image_module_sp); 666 } 667 else 668 { 669 if (log) 670 { 671 log->Printf ("Could not find module for unloading info entry:"); 672 image_infos[idx].PutToLog(log); 673 } 674 } 675 676 // Then remove it from the m_dyld_image_infos: 677 678 m_dyld_image_infos.erase(pos); 679 break; 680 } 681 } 682 683 if (pos == end) 684 { 685 if (log) 686 { 687 log->Printf ("Could not find image_info entry for unloading image:"); 688 image_infos[idx].PutToLog(log); 689 } 690 } 691 } 692 if (unloaded_module_list.GetSize() > 0) 693 { 694 if (log) 695 { 696 log->PutCString("Unloaded:"); 697 unloaded_module_list.LogUUIDAndPaths (log, "DynamicLoaderMacOSXDYLD::ModulesDidUnload"); 698 } 699 m_process->GetTarget().GetImages().Remove (unloaded_module_list); 700 } 701 m_dyld_image_infos_stop_id = m_process->GetStopID(); 702 return true; 703 } 704 705 bool 706 DynamicLoaderMacOSXDYLD::ReadImageInfos (lldb::addr_t image_infos_addr, 707 uint32_t image_infos_count, 708 ImageInfo::collection &image_infos) 709 { 710 std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); 711 const ByteOrder endian = GetByteOrderFromMagic (m_dyld.header.magic); 712 const uint32_t addr_size = m_dyld.GetAddressByteSize(); 713 714 image_infos.resize(image_infos_count); 715 const size_t count = image_infos.size() * 3 * addr_size; 716 DataBufferHeap info_data(count, 0); 717 Error error; 718 const size_t bytes_read = m_process->ReadMemory (image_infos_addr, 719 info_data.GetBytes(), 720 info_data.GetByteSize(), 721 error); 722 if (bytes_read == count) 723 { 724 lldb::offset_t info_data_offset = 0; 725 DataExtractor info_data_ref(info_data.GetBytes(), info_data.GetByteSize(), endian, addr_size); 726 for (size_t i = 0; i < image_infos.size() && info_data_ref.ValidOffset(info_data_offset); i++) 727 { 728 image_infos[i].address = info_data_ref.GetPointer(&info_data_offset); 729 lldb::addr_t path_addr = info_data_ref.GetPointer(&info_data_offset); 730 image_infos[i].mod_date = info_data_ref.GetPointer(&info_data_offset); 731 732 char raw_path[PATH_MAX]; 733 m_process->ReadCStringFromMemory (path_addr, raw_path, sizeof(raw_path), error); 734 // don't resolve the path 735 if (error.Success()) 736 { 737 const bool resolve_path = false; 738 image_infos[i].file_spec.SetFile(raw_path, resolve_path); 739 } 740 } 741 return true; 742 } 743 else 744 { 745 return false; 746 } 747 } 748 749 //---------------------------------------------------------------------- 750 // If we have found where the "_dyld_all_image_infos" lives in memory, 751 // read the current info from it, and then update all image load 752 // addresses (or lack thereof). Only do this if this is the first time 753 // we're reading the dyld infos. Return true if we actually read anything, 754 // and false otherwise. 755 //---------------------------------------------------------------------- 756 bool 757 DynamicLoaderMacOSXDYLD::InitializeFromAllImageInfos () 758 { 759 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); 760 761 std::lock_guard<std::recursive_mutex> guard(m_mutex); 762 std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); 763 if (m_process->GetStopID() == m_dyld_image_infos_stop_id 764 || m_dyld_image_infos.size() != 0) 765 return false; 766 767 if (ReadAllImageInfosStructure ()) 768 { 769 // Nothing to load or unload? 770 if (m_dyld_all_image_infos.dylib_info_count == 0) 771 return true; 772 773 if (m_dyld_all_image_infos.dylib_info_addr == 0) 774 { 775 // DYLD is updating the images now. So we should say we have no images, and then we'll 776 // figure it out when we hit the added breakpoint. 777 return false; 778 } 779 else 780 { 781 if (!AddModulesUsingImageInfosAddress (m_dyld_all_image_infos.dylib_info_addr, 782 m_dyld_all_image_infos.dylib_info_count)) 783 { 784 DEBUG_PRINTF("%s", "unable to read all data for all_dylib_infos."); 785 m_dyld_image_infos.clear(); 786 } 787 } 788 789 // Now we have one more bit of business. If there is a library left in the images for our target that 790 // doesn't have a load address, then it must be something that we were expecting to load (for instance we 791 // read a load command for it) but it didn't in fact load - probably because DYLD_*_PATH pointed 792 // to an equivalent version. We don't want it to stay in the target's module list or it will confuse 793 // us, so unload it here. 794 Target &target = m_process->GetTarget(); 795 const ModuleList &target_modules = target.GetImages(); 796 ModuleList not_loaded_modules; 797 std::lock_guard<std::recursive_mutex> guard(target_modules.GetMutex()); 798 799 size_t num_modules = target_modules.GetSize(); 800 for (size_t i = 0; i < num_modules; i++) 801 { 802 ModuleSP module_sp = target_modules.GetModuleAtIndexUnlocked (i); 803 if (!module_sp->IsLoadedInTarget (&target)) 804 { 805 if (log) 806 { 807 StreamString s; 808 module_sp->GetDescription (&s); 809 log->Printf ("Unloading pre-run module: %s.", s.GetData ()); 810 } 811 not_loaded_modules.Append (module_sp); 812 } 813 } 814 815 if (not_loaded_modules.GetSize() != 0) 816 { 817 target.GetImages().Remove(not_loaded_modules); 818 } 819 820 return true; 821 } 822 else 823 return false; 824 } 825 826 //---------------------------------------------------------------------- 827 // Read a mach_header at ADDR into HEADER, and also fill in the load 828 // command data into LOAD_COMMAND_DATA if it is non-NULL. 829 // 830 // Returns true if we succeed, false if we fail for any reason. 831 //---------------------------------------------------------------------- 832 bool 833 DynamicLoaderMacOSXDYLD::ReadMachHeader (lldb::addr_t addr, llvm::MachO::mach_header *header, DataExtractor *load_command_data) 834 { 835 DataBufferHeap header_bytes(sizeof(llvm::MachO::mach_header), 0); 836 Error error; 837 size_t bytes_read = m_process->ReadMemory (addr, 838 header_bytes.GetBytes(), 839 header_bytes.GetByteSize(), 840 error); 841 if (bytes_read == sizeof(llvm::MachO::mach_header)) 842 { 843 lldb::offset_t offset = 0; 844 ::memset (header, 0, sizeof(llvm::MachO::mach_header)); 845 846 // Get the magic byte unswapped so we can figure out what we are dealing with 847 DataExtractor data(header_bytes.GetBytes(), header_bytes.GetByteSize(), endian::InlHostByteOrder(), 4); 848 header->magic = data.GetU32(&offset); 849 lldb::addr_t load_cmd_addr = addr; 850 data.SetByteOrder(DynamicLoaderMacOSXDYLD::GetByteOrderFromMagic(header->magic)); 851 switch (header->magic) 852 { 853 case llvm::MachO::MH_MAGIC: 854 case llvm::MachO::MH_CIGAM: 855 data.SetAddressByteSize(4); 856 load_cmd_addr += sizeof(llvm::MachO::mach_header); 857 break; 858 859 case llvm::MachO::MH_MAGIC_64: 860 case llvm::MachO::MH_CIGAM_64: 861 data.SetAddressByteSize(8); 862 load_cmd_addr += sizeof(llvm::MachO::mach_header_64); 863 break; 864 865 default: 866 return false; 867 } 868 869 // Read the rest of dyld's mach header 870 if (data.GetU32(&offset, &header->cputype, (sizeof(llvm::MachO::mach_header)/sizeof(uint32_t)) - 1)) 871 { 872 if (load_command_data == NULL) 873 return true; // We were able to read the mach_header and weren't asked to read the load command bytes 874 875 DataBufferSP load_cmd_data_sp(new DataBufferHeap(header->sizeofcmds, 0)); 876 877 size_t load_cmd_bytes_read = m_process->ReadMemory (load_cmd_addr, 878 load_cmd_data_sp->GetBytes(), 879 load_cmd_data_sp->GetByteSize(), 880 error); 881 882 if (load_cmd_bytes_read == header->sizeofcmds) 883 { 884 // Set the load command data and also set the correct endian 885 // swap settings and the correct address size 886 load_command_data->SetData(load_cmd_data_sp, 0, header->sizeofcmds); 887 load_command_data->SetByteOrder(data.GetByteOrder()); 888 load_command_data->SetAddressByteSize(data.GetAddressByteSize()); 889 return true; // We successfully read the mach_header and the load command data 890 } 891 892 return false; // We weren't able to read the load command data 893 } 894 } 895 return false; // We failed the read the mach_header 896 } 897 898 899 //---------------------------------------------------------------------- 900 // Parse the load commands for an image 901 //---------------------------------------------------------------------- 902 uint32_t 903 DynamicLoaderMacOSXDYLD::ParseLoadCommands (const DataExtractor& data, ImageInfo& dylib_info, FileSpec *lc_id_dylinker) 904 { 905 lldb::offset_t offset = 0; 906 uint32_t cmd_idx; 907 Segment segment; 908 dylib_info.Clear (true); 909 910 for (cmd_idx = 0; cmd_idx < dylib_info.header.ncmds; cmd_idx++) 911 { 912 // Clear out any load command specific data from DYLIB_INFO since 913 // we are about to read it. 914 915 if (data.ValidOffsetForDataOfSize (offset, sizeof(llvm::MachO::load_command))) 916 { 917 llvm::MachO::load_command load_cmd; 918 lldb::offset_t load_cmd_offset = offset; 919 load_cmd.cmd = data.GetU32 (&offset); 920 load_cmd.cmdsize = data.GetU32 (&offset); 921 switch (load_cmd.cmd) 922 { 923 case llvm::MachO::LC_SEGMENT: 924 { 925 segment.name.SetTrimmedCStringWithLength ((const char *)data.GetData(&offset, 16), 16); 926 // We are putting 4 uint32_t values 4 uint64_t values so 927 // we have to use multiple 32 bit gets below. 928 segment.vmaddr = data.GetU32 (&offset); 929 segment.vmsize = data.GetU32 (&offset); 930 segment.fileoff = data.GetU32 (&offset); 931 segment.filesize = data.GetU32 (&offset); 932 // Extract maxprot, initprot, nsects and flags all at once 933 data.GetU32(&offset, &segment.maxprot, 4); 934 dylib_info.segments.push_back (segment); 935 } 936 break; 937 938 case llvm::MachO::LC_SEGMENT_64: 939 { 940 segment.name.SetTrimmedCStringWithLength ((const char *)data.GetData(&offset, 16), 16); 941 // Extract vmaddr, vmsize, fileoff, and filesize all at once 942 data.GetU64(&offset, &segment.vmaddr, 4); 943 // Extract maxprot, initprot, nsects and flags all at once 944 data.GetU32(&offset, &segment.maxprot, 4); 945 dylib_info.segments.push_back (segment); 946 } 947 break; 948 949 case llvm::MachO::LC_ID_DYLINKER: 950 if (lc_id_dylinker) 951 { 952 const lldb::offset_t name_offset = load_cmd_offset + data.GetU32 (&offset); 953 const char *path = data.PeekCStr (name_offset); 954 lc_id_dylinker->SetFile (path, true); 955 } 956 break; 957 958 case llvm::MachO::LC_UUID: 959 dylib_info.uuid.SetBytes(data.GetData (&offset, 16)); 960 break; 961 962 default: 963 break; 964 } 965 // Set offset to be the beginning of the next load command. 966 offset = load_cmd_offset + load_cmd.cmdsize; 967 } 968 } 969 970 // All sections listed in the dyld image info structure will all 971 // either be fixed up already, or they will all be off by a single 972 // slide amount that is determined by finding the first segment 973 // that is at file offset zero which also has bytes (a file size 974 // that is greater than zero) in the object file. 975 976 // Determine the slide amount (if any) 977 const size_t num_sections = dylib_info.segments.size(); 978 for (size_t i = 0; i < num_sections; ++i) 979 { 980 // Iterate through the object file sections to find the 981 // first section that starts of file offset zero and that 982 // has bytes in the file... 983 if ((dylib_info.segments[i].fileoff == 0 && dylib_info.segments[i].filesize > 0) || (dylib_info.segments[i].name == ConstString("__TEXT"))) 984 { 985 dylib_info.slide = dylib_info.address - dylib_info.segments[i].vmaddr; 986 // We have found the slide amount, so we can exit 987 // this for loop. 988 break; 989 } 990 } 991 return cmd_idx; 992 } 993 994 //---------------------------------------------------------------------- 995 // Read the mach_header and load commands for each image that the 996 // _dyld_all_image_infos structure points to and cache the results. 997 //---------------------------------------------------------------------- 998 999 void 1000 DynamicLoaderMacOSXDYLD::UpdateImageInfosHeaderAndLoadCommands(ImageInfo::collection &image_infos, 1001 uint32_t infos_count, 1002 bool update_executable) 1003 { 1004 uint32_t exe_idx = UINT32_MAX; 1005 // Read any UUID values that we can get 1006 for (uint32_t i = 0; i < infos_count; i++) 1007 { 1008 if (!image_infos[i].UUIDValid()) 1009 { 1010 DataExtractor data; // Load command data 1011 if (!ReadMachHeader (image_infos[i].address, &image_infos[i].header, &data)) 1012 continue; 1013 1014 ParseLoadCommands (data, image_infos[i], NULL); 1015 1016 if (image_infos[i].header.filetype == llvm::MachO::MH_EXECUTE) 1017 exe_idx = i; 1018 1019 } 1020 } 1021 1022 Target &target = m_process->GetTarget(); 1023 1024 if (exe_idx < image_infos.size()) 1025 { 1026 const bool can_create = true; 1027 ModuleSP exe_module_sp (FindTargetModuleForImageInfo (image_infos[exe_idx], can_create, NULL)); 1028 1029 if (exe_module_sp) 1030 { 1031 UpdateImageLoadAddress (exe_module_sp.get(), image_infos[exe_idx]); 1032 1033 if (exe_module_sp.get() != target.GetExecutableModulePointer()) 1034 { 1035 // Don't load dependent images since we are in dyld where we will know 1036 // and find out about all images that are loaded. Also when setting the 1037 // executable module, it will clear the targets module list, and if we 1038 // have an in memory dyld module, it will get removed from the list 1039 // so we will need to add it back after setting the executable module, 1040 // so we first try and see if we already have a weak pointer to the 1041 // dyld module, make it into a shared pointer, then add the executable, 1042 // then re-add it back to make sure it is always in the list. 1043 ModuleSP dyld_module_sp(GetDYLDModule ()); 1044 1045 const bool get_dependent_images = false; 1046 m_process->GetTarget().SetExecutableModule (exe_module_sp, 1047 get_dependent_images); 1048 1049 if (dyld_module_sp) 1050 { 1051 if(target.GetImages().AppendIfNeeded (dyld_module_sp)) 1052 { 1053 std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); 1054 1055 // Also add it to the section list. 1056 UpdateImageLoadAddress(dyld_module_sp.get(), m_dyld); 1057 } 1058 } 1059 } 1060 } 1061 } 1062 } 1063 1064 1065 //---------------------------------------------------------------------- 1066 // Dump the _dyld_all_image_infos members and all current image infos 1067 // that we have parsed to the file handle provided. 1068 //---------------------------------------------------------------------- 1069 void 1070 DynamicLoaderMacOSXDYLD::PutToLog(Log *log) const 1071 { 1072 if (log == NULL) 1073 return; 1074 1075 std::lock_guard<std::recursive_mutex> guard(m_mutex); 1076 std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); 1077 log->Printf("dyld_all_image_infos = { version=%d, count=%d, addr=0x%8.8" PRIx64 ", notify=0x%8.8" PRIx64 " }", 1078 m_dyld_all_image_infos.version, 1079 m_dyld_all_image_infos.dylib_info_count, 1080 (uint64_t)m_dyld_all_image_infos.dylib_info_addr, 1081 (uint64_t)m_dyld_all_image_infos.notification); 1082 size_t i; 1083 const size_t count = m_dyld_image_infos.size(); 1084 if (count > 0) 1085 { 1086 log->PutCString("Loaded:"); 1087 for (i = 0; i<count; i++) 1088 m_dyld_image_infos[i].PutToLog(log); 1089 } 1090 } 1091 1092 bool 1093 DynamicLoaderMacOSXDYLD::SetNotificationBreakpoint () 1094 { 1095 DEBUG_PRINTF("DynamicLoaderMacOSXDYLD::%s() process state = %s\n", __FUNCTION__, StateAsCString(m_process->GetState())); 1096 if (m_break_id == LLDB_INVALID_BREAK_ID) 1097 { 1098 if (m_dyld_all_image_infos.notification != LLDB_INVALID_ADDRESS) 1099 { 1100 Address so_addr; 1101 // Set the notification breakpoint and install a breakpoint 1102 // callback function that will get called each time the 1103 // breakpoint gets hit. We will use this to track when shared 1104 // libraries get loaded/unloaded. 1105 bool resolved = m_process->GetTarget().ResolveLoadAddress(m_dyld_all_image_infos.notification, so_addr); 1106 if (!resolved) 1107 { 1108 ModuleSP dyld_module_sp = m_dyld_module_wp.lock(); 1109 if (dyld_module_sp) 1110 { 1111 std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); 1112 1113 UpdateImageLoadAddress (dyld_module_sp.get(), m_dyld); 1114 resolved = m_process->GetTarget().ResolveLoadAddress(m_dyld_all_image_infos.notification, so_addr); 1115 } 1116 } 1117 1118 if (resolved) 1119 { 1120 Breakpoint *dyld_break = m_process->GetTarget().CreateBreakpoint (so_addr, true, false).get(); 1121 dyld_break->SetCallback (DynamicLoaderMacOSXDYLD::NotifyBreakpointHit, this, true); 1122 dyld_break->SetBreakpointKind ("shared-library-event"); 1123 m_break_id = dyld_break->GetID(); 1124 } 1125 } 1126 } 1127 return m_break_id != LLDB_INVALID_BREAK_ID; 1128 } 1129 1130 Error 1131 DynamicLoaderMacOSXDYLD::CanLoadImage () 1132 { 1133 Error error; 1134 // In order for us to tell if we can load a shared library we verify that 1135 // the dylib_info_addr isn't zero (which means no shared libraries have 1136 // been set yet, or dyld is currently mucking with the shared library list). 1137 if (ReadAllImageInfosStructure ()) 1138 { 1139 // TODO: also check the _dyld_global_lock_held variable in libSystem.B.dylib? 1140 // TODO: check the malloc lock? 1141 // TODO: check the objective C lock? 1142 if (m_dyld_all_image_infos.dylib_info_addr != 0) 1143 return error; // Success 1144 } 1145 1146 error.SetErrorString("unsafe to load or unload shared libraries"); 1147 return error; 1148 } 1149 1150 void 1151 DynamicLoaderMacOSXDYLD::Initialize() 1152 { 1153 PluginManager::RegisterPlugin (GetPluginNameStatic(), 1154 GetPluginDescriptionStatic(), 1155 CreateInstance); 1156 } 1157 1158 void 1159 DynamicLoaderMacOSXDYLD::Terminate() 1160 { 1161 PluginManager::UnregisterPlugin (CreateInstance); 1162 } 1163 1164 1165 lldb_private::ConstString 1166 DynamicLoaderMacOSXDYLD::GetPluginNameStatic() 1167 { 1168 static ConstString g_name("macosx-dyld"); 1169 return g_name; 1170 } 1171 1172 const char * 1173 DynamicLoaderMacOSXDYLD::GetPluginDescriptionStatic() 1174 { 1175 return "Dynamic loader plug-in that watches for shared library loads/unloads in MacOSX user processes."; 1176 } 1177 1178 1179 //------------------------------------------------------------------ 1180 // PluginInterface protocol 1181 //------------------------------------------------------------------ 1182 lldb_private::ConstString 1183 DynamicLoaderMacOSXDYLD::GetPluginName() 1184 { 1185 return GetPluginNameStatic(); 1186 } 1187 1188 uint32_t 1189 DynamicLoaderMacOSXDYLD::GetPluginVersion() 1190 { 1191 return 1; 1192 } 1193 1194 uint32_t 1195 DynamicLoaderMacOSXDYLD::AddrByteSize() 1196 { 1197 std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); 1198 1199 switch (m_dyld.header.magic) 1200 { 1201 case llvm::MachO::MH_MAGIC: 1202 case llvm::MachO::MH_CIGAM: 1203 return 4; 1204 1205 case llvm::MachO::MH_MAGIC_64: 1206 case llvm::MachO::MH_CIGAM_64: 1207 return 8; 1208 1209 default: 1210 break; 1211 } 1212 return 0; 1213 } 1214 1215 lldb::ByteOrder 1216 DynamicLoaderMacOSXDYLD::GetByteOrderFromMagic(uint32_t magic) 1217 { 1218 switch (magic) 1219 { 1220 case llvm::MachO::MH_MAGIC: 1221 case llvm::MachO::MH_MAGIC_64: 1222 return endian::InlHostByteOrder(); 1223 1224 case llvm::MachO::MH_CIGAM: 1225 case llvm::MachO::MH_CIGAM_64: 1226 if (endian::InlHostByteOrder() == lldb::eByteOrderBig) 1227 return lldb::eByteOrderLittle; 1228 else 1229 return lldb::eByteOrderBig; 1230 1231 default: 1232 break; 1233 } 1234 return lldb::eByteOrderInvalid; 1235 } 1236