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 11 #include "lldb/Breakpoint/StoppointCallbackContext.h" 12 #include "lldb/Core/DataBuffer.h" 13 #include "lldb/Core/DataBufferHeap.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/Function.h" 21 #include "lldb/Symbol/ObjectFile.h" 22 #include "lldb/Target/ObjCLanguageRuntime.h" 23 #include "lldb/Target/RegisterContext.h" 24 #include "lldb/Target/Target.h" 25 #include "lldb/Target/Thread.h" 26 #include "lldb/Target/ThreadPlanRunToAddress.h" 27 #include "lldb/Target/StackFrame.h" 28 29 #include "DynamicLoaderMacOSXDYLD.h" 30 31 //#define ENABLE_DEBUG_PRINTF // COMMENT THIS LINE OUT PRIOR TO CHECKIN 32 #ifdef ENABLE_DEBUG_PRINTF 33 #include <stdio.h> 34 #define DEBUG_PRINTF(fmt, ...) printf(fmt, ## __VA_ARGS__) 35 #else 36 #define DEBUG_PRINTF(fmt, ...) 37 #endif 38 39 #ifndef __APPLE__ 40 #include "Utility/UuidCompatibility.h" 41 #endif 42 43 using namespace lldb; 44 using namespace lldb_private; 45 46 /// FIXME - The ObjC Runtime trampoline handler doesn't really belong here. 47 /// I am putting it here so I can invoke it in the Trampoline code here, but 48 /// it should be moved to the ObjC Runtime support when it is set up. 49 50 51 DynamicLoaderMacOSXDYLD::DYLDImageInfo * 52 DynamicLoaderMacOSXDYLD::GetImageInfo (Module *module) 53 { 54 const UUID &module_uuid = module->GetUUID(); 55 DYLDImageInfo::collection::iterator pos, end = m_dyld_image_infos.end(); 56 57 // First try just by UUID as it is the safest. 58 if (module_uuid.IsValid()) 59 { 60 for (pos = m_dyld_image_infos.begin(); pos != end; ++pos) 61 { 62 if (pos->uuid == module_uuid) 63 return &(*pos); 64 } 65 66 if (m_dyld.uuid == module_uuid) 67 return &m_dyld; 68 } 69 70 // Next try by platform path only for things that don't have a valid UUID 71 // since if a file has a valid UUID in real life it should also in the 72 // dyld info. This is the next safest because the paths in the dyld info 73 // are platform paths, not local paths. For local debugging platform == local 74 // paths. 75 const FileSpec &platform_file_spec = module->GetPlatformFileSpec(); 76 for (pos = m_dyld_image_infos.begin(); pos != end; ++pos) 77 { 78 if (pos->file_spec == platform_file_spec && pos->uuid.IsValid() == false) 79 return &(*pos); 80 } 81 82 if (m_dyld.file_spec == platform_file_spec && m_dyld.uuid.IsValid() == false) 83 return &m_dyld; 84 85 return NULL; 86 } 87 88 //---------------------------------------------------------------------- 89 // Create an instance of this class. This function is filled into 90 // the plugin info class that gets handed out by the plugin factory and 91 // allows the lldb to instantiate an instance of this class. 92 //---------------------------------------------------------------------- 93 DynamicLoader * 94 DynamicLoaderMacOSXDYLD::CreateInstance (Process* process, bool force) 95 { 96 bool create = force; 97 if (!create) 98 { 99 create = true; 100 Module* exe_module = process->GetTarget().GetExecutableModulePointer(); 101 if (exe_module) 102 { 103 ObjectFile *object_file = exe_module->GetObjectFile(); 104 if (object_file) 105 { 106 create = (object_file->GetStrata() == ObjectFile::eStrataUser); 107 } 108 } 109 110 if (create) 111 { 112 const llvm::Triple &triple_ref = process->GetTarget().GetArchitecture().GetTriple(); 113 switch (triple_ref.getOS()) 114 { 115 case llvm::Triple::Darwin: 116 case llvm::Triple::MacOSX: 117 case llvm::Triple::IOS: 118 create = triple_ref.getVendor() == llvm::Triple::Apple; 119 break; 120 default: 121 create = false; 122 break; 123 } 124 } 125 } 126 127 if (create) 128 return new DynamicLoaderMacOSXDYLD (process); 129 return NULL; 130 } 131 132 //---------------------------------------------------------------------- 133 // Constructor 134 //---------------------------------------------------------------------- 135 DynamicLoaderMacOSXDYLD::DynamicLoaderMacOSXDYLD (Process* process) : 136 DynamicLoader(process), 137 m_dyld(), 138 m_dyld_module_wp(), 139 m_dyld_all_image_infos_addr(LLDB_INVALID_ADDRESS), 140 m_dyld_all_image_infos(), 141 m_dyld_all_image_infos_stop_id (UINT32_MAX), 142 m_break_id(LLDB_INVALID_BREAK_ID), 143 m_dyld_image_infos(), 144 m_dyld_image_infos_stop_id (UINT32_MAX), 145 m_mutex(Mutex::eMutexTypeRecursive), 146 m_process_image_addr_is_all_images_infos (false) 147 { 148 } 149 150 //---------------------------------------------------------------------- 151 // Destructor 152 //---------------------------------------------------------------------- 153 DynamicLoaderMacOSXDYLD::~DynamicLoaderMacOSXDYLD() 154 { 155 Clear(true); 156 } 157 158 //------------------------------------------------------------------ 159 /// Called after attaching a process. 160 /// 161 /// Allow DynamicLoader plug-ins to execute some code after 162 /// attaching to a process. 163 //------------------------------------------------------------------ 164 void 165 DynamicLoaderMacOSXDYLD::DidAttach () 166 { 167 PrivateInitialize(m_process); 168 LocateDYLD (); 169 SetNotificationBreakpoint (); 170 } 171 172 //------------------------------------------------------------------ 173 /// Called after attaching a process. 174 /// 175 /// Allow DynamicLoader plug-ins to execute some code after 176 /// attaching to a process. 177 //------------------------------------------------------------------ 178 void 179 DynamicLoaderMacOSXDYLD::DidLaunch () 180 { 181 PrivateInitialize(m_process); 182 LocateDYLD (); 183 SetNotificationBreakpoint (); 184 } 185 186 bool 187 DynamicLoaderMacOSXDYLD::ProcessDidExec () 188 { 189 if (m_process) 190 { 191 // If we are stopped after an exec, we will have only one thread... 192 if (m_process->GetThreadList().GetSize() == 1) 193 { 194 // We know if a process has exec'ed if our "m_dyld_all_image_infos_addr" 195 // value differs from the Process' image info address. When a process 196 // execs itself it might cause a change if ASLR is enabled. 197 const addr_t shlib_addr = m_process->GetImageInfoAddress (); 198 if (m_process_image_addr_is_all_images_infos == true && shlib_addr != m_dyld_all_image_infos_addr) 199 { 200 // The image info address from the process is the 'dyld_all_image_infos' 201 // address and it has changed. 202 return true; 203 } 204 205 if (m_process_image_addr_is_all_images_infos == false && shlib_addr == m_dyld.address) 206 { 207 // The image info address from the process is the mach_header 208 // address for dyld and it has changed. 209 return true; 210 } 211 212 // ASLR might be disabled and dyld could have ended up in the same 213 // location. We should try and detect if we are stopped at '_dyld_start' 214 ThreadSP thread_sp (m_process->GetThreadList().GetThreadAtIndex(0)); 215 if (thread_sp) 216 { 217 lldb::StackFrameSP frame_sp (thread_sp->GetStackFrameAtIndex(0)); 218 if (frame_sp) 219 { 220 const Symbol *symbol = frame_sp->GetSymbolContext(eSymbolContextSymbol).symbol; 221 if (symbol) 222 { 223 if (symbol->GetName() == ConstString("_dyld_start")) 224 return true; 225 } 226 } 227 } 228 } 229 } 230 return false; 231 } 232 233 234 235 //---------------------------------------------------------------------- 236 // Clear out the state of this class. 237 //---------------------------------------------------------------------- 238 void 239 DynamicLoaderMacOSXDYLD::Clear (bool clear_process) 240 { 241 Mutex::Locker locker(m_mutex); 242 243 if (m_process->IsAlive() && LLDB_BREAK_ID_IS_VALID(m_break_id)) 244 m_process->GetTarget().RemoveBreakpointByID (m_break_id); 245 246 if (clear_process) 247 m_process = NULL; 248 m_dyld.Clear(false); 249 m_dyld_all_image_infos_addr = LLDB_INVALID_ADDRESS; 250 m_dyld_all_image_infos.Clear(); 251 m_break_id = LLDB_INVALID_BREAK_ID; 252 m_dyld_image_infos.clear(); 253 } 254 255 //---------------------------------------------------------------------- 256 // Check if we have found DYLD yet 257 //---------------------------------------------------------------------- 258 bool 259 DynamicLoaderMacOSXDYLD::DidSetNotificationBreakpoint() const 260 { 261 return LLDB_BREAK_ID_IS_VALID (m_break_id); 262 } 263 264 //---------------------------------------------------------------------- 265 // Try and figure out where dyld is by first asking the Process 266 // if it knows (which currently calls down in the the lldb::Process 267 // to get the DYLD info (available on SnowLeopard only). If that fails, 268 // then check in the default addresses. 269 //---------------------------------------------------------------------- 270 bool 271 DynamicLoaderMacOSXDYLD::LocateDYLD() 272 { 273 if (m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS) 274 { 275 // Check the image info addr as it might point to the 276 // mach header for dyld, or it might point to the 277 // dyld_all_image_infos struct 278 const addr_t shlib_addr = m_process->GetImageInfoAddress (); 279 if (shlib_addr != LLDB_INVALID_ADDRESS) 280 { 281 ByteOrder byte_order = m_process->GetTarget().GetArchitecture().GetByteOrder(); 282 uint8_t buf[4]; 283 DataExtractor data (buf, sizeof(buf), byte_order, 4); 284 Error error; 285 if (m_process->ReadMemory (shlib_addr, buf, 4, error) == 4) 286 { 287 lldb::offset_t offset = 0; 288 uint32_t magic = data.GetU32 (&offset); 289 switch (magic) 290 { 291 case llvm::MachO::MH_MAGIC: 292 case llvm::MachO::MH_MAGIC_64: 293 case llvm::MachO::MH_CIGAM: 294 case llvm::MachO::MH_CIGAM_64: 295 m_process_image_addr_is_all_images_infos = false; 296 return ReadDYLDInfoFromMemoryAndSetNotificationCallback(shlib_addr); 297 298 default: 299 break; 300 } 301 } 302 // Maybe it points to the all image infos? 303 m_dyld_all_image_infos_addr = shlib_addr; 304 m_process_image_addr_is_all_images_infos = true; 305 } 306 } 307 308 if (m_dyld_all_image_infos_addr != LLDB_INVALID_ADDRESS) 309 { 310 if (ReadAllImageInfosStructure ()) 311 { 312 if (m_dyld_all_image_infos.dyldImageLoadAddress != LLDB_INVALID_ADDRESS) 313 return ReadDYLDInfoFromMemoryAndSetNotificationCallback (m_dyld_all_image_infos.dyldImageLoadAddress); 314 else 315 return ReadDYLDInfoFromMemoryAndSetNotificationCallback (m_dyld_all_image_infos_addr & 0xfffffffffff00000ull); 316 } 317 } 318 319 // Check some default values 320 Module *executable = m_process->GetTarget().GetExecutableModulePointer(); 321 322 if (executable) 323 { 324 const ArchSpec &exe_arch = executable->GetArchitecture(); 325 if (exe_arch.GetAddressByteSize() == 8) 326 { 327 return ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x7fff5fc00000ull); 328 } 329 else if (exe_arch.GetMachine() == llvm::Triple::arm || exe_arch.GetMachine() == llvm::Triple::thumb || exe_arch.GetMachine() == llvm::Triple::arm64) 330 { 331 return ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x2fe00000); 332 } 333 else 334 { 335 return ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x8fe00000); 336 } 337 } 338 return false; 339 } 340 341 ModuleSP 342 DynamicLoaderMacOSXDYLD::FindTargetModuleForDYLDImageInfo (DYLDImageInfo &image_info, bool can_create, bool *did_create_ptr) 343 { 344 if (did_create_ptr) 345 *did_create_ptr = false; 346 347 Target &target = m_process->GetTarget(); 348 const ModuleList &target_images = target.GetImages(); 349 ModuleSpec module_spec (image_info.file_spec, image_info.GetArchitecture ()); 350 module_spec.GetUUID() = image_info.uuid; 351 ModuleSP module_sp (target_images.FindFirstModule (module_spec)); 352 353 if (module_sp && !module_spec.GetUUID().IsValid() && !module_sp->GetUUID().IsValid()) 354 { 355 // No UUID, we must rely upon the cached module modification 356 // time and the modification time of the file on disk 357 if (module_sp->GetModificationTime() != module_sp->GetFileSpec().GetModificationTime()) 358 module_sp.reset(); 359 } 360 361 if (!module_sp) 362 { 363 if (can_create) 364 { 365 module_sp = target.GetSharedModule (module_spec); 366 if (!module_sp || module_sp->GetObjectFile() == NULL) 367 module_sp = m_process->ReadModuleFromMemory (image_info.file_spec, image_info.address); 368 369 if (did_create_ptr) 370 *did_create_ptr = (bool) module_sp; 371 } 372 } 373 return module_sp; 374 } 375 376 //---------------------------------------------------------------------- 377 // Assume that dyld is in memory at ADDR and try to parse it's load 378 // commands 379 //---------------------------------------------------------------------- 380 bool 381 DynamicLoaderMacOSXDYLD::ReadDYLDInfoFromMemoryAndSetNotificationCallback(lldb::addr_t addr) 382 { 383 DataExtractor data; // Load command data 384 if (ReadMachHeader (addr, &m_dyld.header, &data)) 385 { 386 if (m_dyld.header.filetype == llvm::MachO::MH_DYLINKER) 387 { 388 m_dyld.address = addr; 389 ModuleSP dyld_module_sp; 390 if (ParseLoadCommands (data, m_dyld, &m_dyld.file_spec)) 391 { 392 if (m_dyld.file_spec) 393 { 394 dyld_module_sp = FindTargetModuleForDYLDImageInfo (m_dyld, true, NULL); 395 396 if (dyld_module_sp) 397 UpdateImageLoadAddress (dyld_module_sp.get(), m_dyld); 398 } 399 } 400 401 Target &target = m_process->GetTarget(); 402 403 if (m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS && dyld_module_sp.get()) 404 { 405 static ConstString g_dyld_all_image_infos ("dyld_all_image_infos"); 406 const Symbol *symbol = dyld_module_sp->FindFirstSymbolWithNameAndType (g_dyld_all_image_infos, eSymbolTypeData); 407 if (symbol) 408 m_dyld_all_image_infos_addr = symbol->GetAddress().GetLoadAddress(&target); 409 } 410 411 // Update all image infos 412 InitializeFromAllImageInfos (); 413 414 // If we didn't have an executable before, but now we do, then the 415 // dyld module shared pointer might be unique and we may need to add 416 // it again (since Target::SetExecutableModule() will clear the 417 // images). So append the dyld module back to the list if it is 418 /// unique! 419 if (dyld_module_sp) 420 { 421 target.GetImages().AppendIfNeeded (dyld_module_sp); 422 423 // At this point we should have read in dyld's module, and so we should set breakpoints in it: 424 ModuleList modules; 425 modules.Append(dyld_module_sp); 426 target.ModulesDidLoad(modules); 427 m_dyld_module_wp = dyld_module_sp; 428 } 429 return true; 430 } 431 } 432 return false; 433 } 434 435 bool 436 DynamicLoaderMacOSXDYLD::NeedToLocateDYLD () const 437 { 438 return m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS; 439 } 440 441 //---------------------------------------------------------------------- 442 // Update the load addresses for all segments in MODULE using the 443 // updated INFO that is passed in. 444 //---------------------------------------------------------------------- 445 bool 446 DynamicLoaderMacOSXDYLD::UpdateImageLoadAddress (Module *module, DYLDImageInfo& info) 447 { 448 bool changed = false; 449 if (module) 450 { 451 ObjectFile *image_object_file = module->GetObjectFile(); 452 if (image_object_file) 453 { 454 SectionList *section_list = image_object_file->GetSectionList (); 455 if (section_list) 456 { 457 std::vector<uint32_t> inaccessible_segment_indexes; 458 // We now know the slide amount, so go through all sections 459 // and update the load addresses with the correct values. 460 const size_t num_segments = info.segments.size(); 461 for (size_t i=0; i<num_segments; ++i) 462 { 463 // Only load a segment if it has protections. Things like 464 // __PAGEZERO don't have any protections, and they shouldn't 465 // be slid 466 SectionSP section_sp(section_list->FindSectionByName(info.segments[i].name)); 467 468 if (info.segments[i].maxprot == 0) 469 { 470 inaccessible_segment_indexes.push_back(i); 471 } 472 else 473 { 474 const addr_t new_section_load_addr = info.segments[i].vmaddr + info.slide; 475 static ConstString g_section_name_LINKEDIT ("__LINKEDIT"); 476 477 if (section_sp) 478 { 479 // __LINKEDIT sections from files in the shared cache 480 // can overlap so check to see what the segment name is 481 // and pass "false" so we don't warn of overlapping 482 // "Section" objects, and "true" for all other sections. 483 const bool warn_multiple = section_sp->GetName() != g_section_name_LINKEDIT; 484 485 changed = m_process->GetTarget().SetSectionLoadAddress (section_sp, new_section_load_addr, warn_multiple); 486 } 487 else 488 { 489 Host::SystemLog (Host::eSystemLogWarning, 490 "warning: unable to find and load segment named '%s' at 0x%" PRIx64 " in '%s' in macosx dynamic loader plug-in.\n", 491 info.segments[i].name.AsCString("<invalid>"), 492 (uint64_t)new_section_load_addr, 493 image_object_file->GetFileSpec().GetPath().c_str()); 494 } 495 } 496 } 497 498 // If the loaded the file (it changed) and we have segments that 499 // are not readable or writeable, add them to the invalid memory 500 // region cache for the process. This will typically only be 501 // the __PAGEZERO segment in the main executable. We might be able 502 // to apply this more generally to more sections that have no 503 // protections in the future, but for now we are going to just 504 // do __PAGEZERO. 505 if (changed && !inaccessible_segment_indexes.empty()) 506 { 507 for (uint32_t i=0; i<inaccessible_segment_indexes.size(); ++i) 508 { 509 const uint32_t seg_idx = inaccessible_segment_indexes[i]; 510 SectionSP section_sp(section_list->FindSectionByName(info.segments[seg_idx].name)); 511 512 if (section_sp) 513 { 514 static ConstString g_pagezero_section_name("__PAGEZERO"); 515 if (g_pagezero_section_name == section_sp->GetName()) 516 { 517 // __PAGEZERO never slides... 518 const lldb::addr_t vmaddr = info.segments[seg_idx].vmaddr; 519 const lldb::addr_t vmsize = info.segments[seg_idx].vmsize; 520 Process::LoadRange pagezero_range (vmaddr, vmsize); 521 m_process->AddInvalidMemoryRegion(pagezero_range); 522 } 523 } 524 } 525 } 526 } 527 } 528 } 529 // We might have an in memory image that was loaded as soon as it was created 530 if (info.load_stop_id == m_process->GetStopID()) 531 changed = true; 532 else if (changed) 533 { 534 // Update the stop ID when this library was updated 535 info.load_stop_id = m_process->GetStopID(); 536 } 537 return changed; 538 } 539 540 //---------------------------------------------------------------------- 541 // Update the load addresses for all segments in MODULE using the 542 // updated INFO that is passed in. 543 //---------------------------------------------------------------------- 544 bool 545 DynamicLoaderMacOSXDYLD::UnloadImageLoadAddress (Module *module, DYLDImageInfo& info) 546 { 547 bool changed = false; 548 if (module) 549 { 550 ObjectFile *image_object_file = module->GetObjectFile(); 551 if (image_object_file) 552 { 553 SectionList *section_list = image_object_file->GetSectionList (); 554 if (section_list) 555 { 556 const size_t num_segments = info.segments.size(); 557 for (size_t i=0; i<num_segments; ++i) 558 { 559 SectionSP section_sp(section_list->FindSectionByName(info.segments[i].name)); 560 if (section_sp) 561 { 562 const addr_t old_section_load_addr = info.segments[i].vmaddr + info.slide; 563 if (m_process->GetTarget().SetSectionUnloaded (section_sp, old_section_load_addr)) 564 changed = true; 565 } 566 else 567 { 568 Host::SystemLog (Host::eSystemLogWarning, 569 "warning: unable to find and unload segment named '%s' in '%s' in macosx dynamic loader plug-in.\n", 570 info.segments[i].name.AsCString("<invalid>"), 571 image_object_file->GetFileSpec().GetPath().c_str()); 572 } 573 } 574 } 575 } 576 } 577 return changed; 578 } 579 580 581 //---------------------------------------------------------------------- 582 // Static callback function that gets called when our DYLD notification 583 // breakpoint gets hit. We update all of our image infos and then 584 // let our super class DynamicLoader class decide if we should stop 585 // or not (based on global preference). 586 //---------------------------------------------------------------------- 587 bool 588 DynamicLoaderMacOSXDYLD::NotifyBreakpointHit (void *baton, 589 StoppointCallbackContext *context, 590 lldb::user_id_t break_id, 591 lldb::user_id_t break_loc_id) 592 { 593 // Let the event know that the images have changed 594 // DYLD passes three arguments to the notification breakpoint. 595 // Arg1: enum dyld_image_mode mode - 0 = adding, 1 = removing 596 // Arg2: uint32_t infoCount - Number of shared libraries added 597 // Arg3: dyld_image_info info[] - Array of structs of the form: 598 // const struct mach_header *imageLoadAddress 599 // const char *imageFilePath 600 // uintptr_t imageFileModDate (a time_t) 601 602 DynamicLoaderMacOSXDYLD* dyld_instance = (DynamicLoaderMacOSXDYLD*) baton; 603 604 // First step is to see if we've already initialized the all image infos. If we haven't then this function 605 // will do so and return true. In the course of initializing the all_image_infos it will read the complete 606 // current state, so we don't need to figure out what has changed from the data passed in to us. 607 608 if (dyld_instance->InitializeFromAllImageInfos()) 609 return dyld_instance->GetStopWhenImagesChange(); 610 611 ExecutionContext exe_ctx (context->exe_ctx_ref); 612 Process *process = exe_ctx.GetProcessPtr(); 613 const lldb::ABISP &abi = process->GetABI(); 614 if (abi) 615 { 616 // Build up the value array to store the three arguments given above, then get the values from the ABI: 617 618 ClangASTContext *clang_ast_context = process->GetTarget().GetScratchClangASTContext(); 619 ValueList argument_values; 620 Value input_value; 621 622 ClangASTType clang_void_ptr_type = clang_ast_context->GetBasicType(eBasicTypeVoid).GetPointerType(); 623 ClangASTType clang_uint32_type = clang_ast_context->GetBuiltinTypeForEncodingAndBitSize(lldb::eEncodingUint, 32); 624 input_value.SetValueType (Value::eValueTypeScalar); 625 input_value.SetClangType (clang_uint32_type); 626 // input_value.SetContext (Value::eContextTypeClangType, clang_uint32_type); 627 argument_values.PushValue (input_value); 628 argument_values.PushValue (input_value); 629 input_value.SetClangType (clang_void_ptr_type); 630 // input_value.SetContext (Value::eContextTypeClangType, clang_void_ptr_type); 631 argument_values.PushValue (input_value); 632 633 if (abi->GetArgumentValues (exe_ctx.GetThreadRef(), argument_values)) 634 { 635 uint32_t dyld_mode = argument_values.GetValueAtIndex(0)->GetScalar().UInt (-1); 636 if (dyld_mode != static_cast<uint32_t>(-1)) 637 { 638 // Okay the mode was right, now get the number of elements, and the array of new elements... 639 uint32_t image_infos_count = argument_values.GetValueAtIndex(1)->GetScalar().UInt (-1); 640 if (image_infos_count != static_cast<uint32_t>(-1)) 641 { 642 // Got the number added, now go through the array of added elements, putting out the mach header 643 // address, and adding the image. 644 // Note, I'm not putting in logging here, since the AddModules & RemoveModules functions do 645 // all the logging internally. 646 647 lldb::addr_t image_infos_addr = argument_values.GetValueAtIndex(2)->GetScalar().ULongLong(); 648 if (dyld_mode == 0) 649 { 650 // This is add: 651 dyld_instance->AddModulesUsingImageInfosAddress (image_infos_addr, image_infos_count); 652 } 653 else 654 { 655 // This is remove: 656 dyld_instance->RemoveModulesUsingImageInfosAddress (image_infos_addr, image_infos_count); 657 } 658 659 } 660 } 661 } 662 } 663 664 // Return true to stop the target, false to just let the target run 665 return dyld_instance->GetStopWhenImagesChange(); 666 } 667 668 bool 669 DynamicLoaderMacOSXDYLD::ReadAllImageInfosStructure () 670 { 671 Mutex::Locker locker(m_mutex); 672 673 // the all image infos is already valid for this process stop ID 674 if (m_process->GetStopID() == m_dyld_all_image_infos_stop_id) 675 return true; 676 677 m_dyld_all_image_infos.Clear(); 678 if (m_dyld_all_image_infos_addr != LLDB_INVALID_ADDRESS) 679 { 680 ByteOrder byte_order = m_process->GetTarget().GetArchitecture().GetByteOrder(); 681 uint32_t addr_size = 4; 682 if (m_dyld_all_image_infos_addr > UINT32_MAX) 683 addr_size = 8; 684 685 uint8_t buf[256]; 686 DataExtractor data (buf, sizeof(buf), byte_order, addr_size); 687 lldb::offset_t offset = 0; 688 689 const size_t count_v2 = sizeof (uint32_t) + // version 690 sizeof (uint32_t) + // infoArrayCount 691 addr_size + // infoArray 692 addr_size + // notification 693 addr_size + // processDetachedFromSharedRegion + libSystemInitialized + pad 694 addr_size; // dyldImageLoadAddress 695 const size_t count_v11 = count_v2 + 696 addr_size + // jitInfo 697 addr_size + // dyldVersion 698 addr_size + // errorMessage 699 addr_size + // terminationFlags 700 addr_size + // coreSymbolicationShmPage 701 addr_size + // systemOrderFlag 702 addr_size + // uuidArrayCount 703 addr_size + // uuidArray 704 addr_size + // dyldAllImageInfosAddress 705 addr_size + // initialImageCount 706 addr_size + // errorKind 707 addr_size + // errorClientOfDylibPath 708 addr_size + // errorTargetDylibPath 709 addr_size; // errorSymbol 710 const size_t count_v13 = count_v11 + 711 addr_size + // sharedCacheSlide 712 sizeof (uuid_t); // sharedCacheUUID 713 assert (sizeof (buf) >= count_v13); 714 715 Error error; 716 if (m_process->ReadMemory (m_dyld_all_image_infos_addr, buf, 4, error) == 4) 717 { 718 m_dyld_all_image_infos.version = data.GetU32(&offset); 719 // If anything in the high byte is set, we probably got the byte 720 // order incorrect (the process might not have it set correctly 721 // yet due to attaching to a program without a specified file). 722 if (m_dyld_all_image_infos.version & 0xff000000) 723 { 724 // We have guessed the wrong byte order. Swap it and try 725 // reading the version again. 726 if (byte_order == eByteOrderLittle) 727 byte_order = eByteOrderBig; 728 else 729 byte_order = eByteOrderLittle; 730 731 data.SetByteOrder (byte_order); 732 offset = 0; 733 m_dyld_all_image_infos.version = data.GetU32(&offset); 734 } 735 } 736 else 737 { 738 return false; 739 } 740 741 const size_t count = (m_dyld_all_image_infos.version >= 11) ? count_v11 : count_v2; 742 743 const size_t bytes_read = m_process->ReadMemory (m_dyld_all_image_infos_addr, buf, count, error); 744 if (bytes_read == count) 745 { 746 offset = 0; 747 m_dyld_all_image_infos.version = data.GetU32(&offset); 748 m_dyld_all_image_infos.dylib_info_count = data.GetU32(&offset); 749 m_dyld_all_image_infos.dylib_info_addr = data.GetPointer(&offset); 750 m_dyld_all_image_infos.notification = data.GetPointer(&offset); 751 m_dyld_all_image_infos.processDetachedFromSharedRegion = data.GetU8(&offset); 752 m_dyld_all_image_infos.libSystemInitialized = data.GetU8(&offset); 753 // Adjust for padding. 754 offset += addr_size - 2; 755 m_dyld_all_image_infos.dyldImageLoadAddress = data.GetPointer(&offset); 756 if (m_dyld_all_image_infos.version >= 11) 757 { 758 offset += addr_size * 8; 759 uint64_t dyld_all_image_infos_addr = data.GetPointer(&offset); 760 761 // When we started, we were given the actual address of the all_image_infos 762 // struct (probably via TASK_DYLD_INFO) in memory - this address is stored in 763 // m_dyld_all_image_infos_addr and is the most accurate address we have. 764 765 // We read the dyld_all_image_infos struct from memory; it contains its own address. 766 // If the address in the struct does not match the actual address, 767 // the dyld we're looking at has been loaded at a different location (slid) from 768 // where it intended to load. The addresses in the dyld_all_image_infos struct 769 // are the original, non-slid addresses, and need to be adjusted. Most importantly 770 // the address of dyld and the notification address need to be adjusted. 771 772 if (dyld_all_image_infos_addr != m_dyld_all_image_infos_addr) 773 { 774 uint64_t image_infos_offset = dyld_all_image_infos_addr - m_dyld_all_image_infos.dyldImageLoadAddress; 775 uint64_t notification_offset = m_dyld_all_image_infos.notification - m_dyld_all_image_infos.dyldImageLoadAddress; 776 m_dyld_all_image_infos.dyldImageLoadAddress = m_dyld_all_image_infos_addr - image_infos_offset; 777 m_dyld_all_image_infos.notification = m_dyld_all_image_infos.dyldImageLoadAddress + notification_offset; 778 } 779 } 780 m_dyld_all_image_infos_stop_id = m_process->GetStopID(); 781 return true; 782 } 783 } 784 return false; 785 } 786 787 788 bool 789 DynamicLoaderMacOSXDYLD::AddModulesUsingImageInfosAddress (lldb::addr_t image_infos_addr, uint32_t image_infos_count) 790 { 791 DYLDImageInfo::collection image_infos; 792 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); 793 if (log) 794 log->Printf ("Adding %d modules.\n", image_infos_count); 795 796 Mutex::Locker locker(m_mutex); 797 if (m_process->GetStopID() == m_dyld_image_infos_stop_id) 798 return true; 799 800 if (!ReadImageInfos (image_infos_addr, image_infos_count, image_infos)) 801 return false; 802 803 UpdateImageInfosHeaderAndLoadCommands (image_infos, image_infos_count, false); 804 bool return_value = AddModulesUsingImageInfos (image_infos); 805 m_dyld_image_infos_stop_id = m_process->GetStopID(); 806 return return_value; 807 } 808 809 // Adds the modules in image_infos to m_dyld_image_infos. 810 // NB don't call this passing in m_dyld_image_infos. 811 812 bool 813 DynamicLoaderMacOSXDYLD::AddModulesUsingImageInfos (DYLDImageInfo::collection &image_infos) 814 { 815 // Now add these images to the main list. 816 ModuleList loaded_module_list; 817 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); 818 Target &target = m_process->GetTarget(); 819 ModuleList& target_images = target.GetImages(); 820 821 for (uint32_t idx = 0; idx < image_infos.size(); ++idx) 822 { 823 if (log) 824 { 825 log->Printf ("Adding new image at address=0x%16.16" PRIx64 ".", image_infos[idx].address); 826 image_infos[idx].PutToLog (log); 827 } 828 829 m_dyld_image_infos.push_back(image_infos[idx]); 830 831 ModuleSP image_module_sp (FindTargetModuleForDYLDImageInfo (image_infos[idx], true, NULL)); 832 833 if (image_module_sp) 834 { 835 if (image_infos[idx].header.filetype == llvm::MachO::MH_DYLINKER) 836 image_module_sp->SetIsDynamicLinkEditor (true); 837 838 ObjectFile *objfile = image_module_sp->GetObjectFile (); 839 if (objfile) 840 { 841 SectionList *sections = objfile->GetSectionList(); 842 if (sections) 843 { 844 ConstString commpage_dbstr("__commpage"); 845 Section *commpage_section = sections->FindSectionByName(commpage_dbstr).get(); 846 if (commpage_section) 847 { 848 ModuleSpec module_spec (objfile->GetFileSpec(), image_infos[idx].GetArchitecture ()); 849 module_spec.GetObjectName() = commpage_dbstr; 850 ModuleSP commpage_image_module_sp(target_images.FindFirstModule (module_spec)); 851 if (!commpage_image_module_sp) 852 { 853 module_spec.SetObjectOffset (objfile->GetFileOffset() + commpage_section->GetFileOffset()); 854 commpage_image_module_sp = target.GetSharedModule (module_spec); 855 if (!commpage_image_module_sp || commpage_image_module_sp->GetObjectFile() == NULL) 856 { 857 commpage_image_module_sp = m_process->ReadModuleFromMemory (image_infos[idx].file_spec, 858 image_infos[idx].address); 859 // Always load a memory image right away in the target in case 860 // we end up trying to read the symbol table from memory... The 861 // __LINKEDIT will need to be mapped so we can figure out where 862 // the symbol table bits are... 863 bool changed = false; 864 UpdateImageLoadAddress (commpage_image_module_sp.get(), image_infos[idx]); 865 target.GetImages().Append(commpage_image_module_sp); 866 if (changed) 867 { 868 image_infos[idx].load_stop_id = m_process->GetStopID(); 869 loaded_module_list.AppendIfNeeded (commpage_image_module_sp); 870 } 871 } 872 } 873 } 874 } 875 } 876 877 // UpdateImageLoadAddress will return true if any segments 878 // change load address. We need to check this so we don't 879 // mention that all loaded shared libraries are newly loaded 880 // each time we hit out dyld breakpoint since dyld will list all 881 // shared libraries each time. 882 if (UpdateImageLoadAddress (image_module_sp.get(), image_infos[idx])) 883 { 884 target_images.AppendIfNeeded(image_module_sp); 885 loaded_module_list.AppendIfNeeded (image_module_sp); 886 } 887 } 888 } 889 890 if (loaded_module_list.GetSize() > 0) 891 { 892 // FIXME: This should really be in the Runtime handlers class, which should get 893 // called by the target's ModulesDidLoad, but we're doing it all locally for now 894 // to save time. 895 // Also, I'm assuming there can be only one libobjc dylib loaded... 896 897 ObjCLanguageRuntime *objc_runtime = m_process->GetObjCLanguageRuntime(true); 898 if (objc_runtime != NULL && !objc_runtime->HasReadObjCLibrary()) 899 { 900 size_t num_modules = loaded_module_list.GetSize(); 901 for (size_t i = 0; i < num_modules; i++) 902 { 903 if (objc_runtime->IsModuleObjCLibrary (loaded_module_list.GetModuleAtIndex (i))) 904 { 905 objc_runtime->ReadObjCLibrary (loaded_module_list.GetModuleAtIndex (i)); 906 break; 907 } 908 } 909 } 910 if (log) 911 loaded_module_list.LogUUIDAndPaths (log, "DynamicLoaderMacOSXDYLD::ModulesDidLoad"); 912 m_process->GetTarget().ModulesDidLoad (loaded_module_list); 913 } 914 return true; 915 } 916 917 bool 918 DynamicLoaderMacOSXDYLD::RemoveModulesUsingImageInfosAddress (lldb::addr_t image_infos_addr, uint32_t image_infos_count) 919 { 920 DYLDImageInfo::collection image_infos; 921 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); 922 923 Mutex::Locker locker(m_mutex); 924 if (m_process->GetStopID() == m_dyld_image_infos_stop_id) 925 return true; 926 927 // First read in the image_infos for the removed modules, and their headers & load commands. 928 if (!ReadImageInfos (image_infos_addr, image_infos_count, image_infos)) 929 { 930 if (log) 931 log->PutCString ("Failed reading image infos array."); 932 return false; 933 } 934 935 if (log) 936 log->Printf ("Removing %d modules.", image_infos_count); 937 938 ModuleList unloaded_module_list; 939 for (uint32_t idx = 0; idx < image_infos.size(); ++idx) 940 { 941 if (log) 942 { 943 log->Printf ("Removing module at address=0x%16.16" PRIx64 ".", image_infos[idx].address); 944 image_infos[idx].PutToLog (log); 945 } 946 947 // Remove this image_infos from the m_all_image_infos. We do the comparision by address 948 // rather than by file spec because we can have many modules with the same "file spec" in the 949 // case that they are modules loaded from memory. 950 // 951 // Also copy over the uuid from the old entry to the removed entry so we can 952 // use it to lookup the module in the module list. 953 954 DYLDImageInfo::collection::iterator pos, end = m_dyld_image_infos.end(); 955 for (pos = m_dyld_image_infos.begin(); pos != end; pos++) 956 { 957 if (image_infos[idx].address == (*pos).address) 958 { 959 image_infos[idx].uuid = (*pos).uuid; 960 961 // Add the module from this image_info to the "unloaded_module_list". We'll remove them all at 962 // one go later on. 963 964 ModuleSP unload_image_module_sp (FindTargetModuleForDYLDImageInfo (image_infos[idx], false, NULL)); 965 if (unload_image_module_sp.get()) 966 { 967 // When we unload, be sure to use the image info from the old list, 968 // since that has sections correctly filled in. 969 UnloadImageLoadAddress (unload_image_module_sp.get(), *pos); 970 unloaded_module_list.AppendIfNeeded (unload_image_module_sp); 971 } 972 else 973 { 974 if (log) 975 { 976 log->Printf ("Could not find module for unloading info entry:"); 977 image_infos[idx].PutToLog(log); 978 } 979 } 980 981 // Then remove it from the m_dyld_image_infos: 982 983 m_dyld_image_infos.erase(pos); 984 break; 985 } 986 } 987 988 if (pos == end) 989 { 990 if (log) 991 { 992 log->Printf ("Could not find image_info entry for unloading image:"); 993 image_infos[idx].PutToLog(log); 994 } 995 } 996 } 997 if (unloaded_module_list.GetSize() > 0) 998 { 999 if (log) 1000 { 1001 log->PutCString("Unloaded:"); 1002 unloaded_module_list.LogUUIDAndPaths (log, "DynamicLoaderMacOSXDYLD::ModulesDidUnload"); 1003 } 1004 m_process->GetTarget().GetImages().Remove (unloaded_module_list); 1005 } 1006 m_dyld_image_infos_stop_id = m_process->GetStopID(); 1007 return true; 1008 } 1009 1010 bool 1011 DynamicLoaderMacOSXDYLD::ReadImageInfos (lldb::addr_t image_infos_addr, 1012 uint32_t image_infos_count, 1013 DYLDImageInfo::collection &image_infos) 1014 { 1015 const ByteOrder endian = m_dyld.GetByteOrder(); 1016 const uint32_t addr_size = m_dyld.GetAddressByteSize(); 1017 1018 image_infos.resize(image_infos_count); 1019 const size_t count = image_infos.size() * 3 * addr_size; 1020 DataBufferHeap info_data(count, 0); 1021 Error error; 1022 const size_t bytes_read = m_process->ReadMemory (image_infos_addr, 1023 info_data.GetBytes(), 1024 info_data.GetByteSize(), 1025 error); 1026 if (bytes_read == count) 1027 { 1028 lldb::offset_t info_data_offset = 0; 1029 DataExtractor info_data_ref(info_data.GetBytes(), info_data.GetByteSize(), endian, addr_size); 1030 for (size_t i = 0; i < image_infos.size() && info_data_ref.ValidOffset(info_data_offset); i++) 1031 { 1032 image_infos[i].address = info_data_ref.GetPointer(&info_data_offset); 1033 lldb::addr_t path_addr = info_data_ref.GetPointer(&info_data_offset); 1034 image_infos[i].mod_date = info_data_ref.GetPointer(&info_data_offset); 1035 1036 char raw_path[PATH_MAX]; 1037 m_process->ReadCStringFromMemory (path_addr, raw_path, sizeof(raw_path), error); 1038 // don't resolve the path 1039 if (error.Success()) 1040 { 1041 const bool resolve_path = false; 1042 image_infos[i].file_spec.SetFile(raw_path, resolve_path); 1043 } 1044 } 1045 return true; 1046 } 1047 else 1048 { 1049 return false; 1050 } 1051 } 1052 1053 //---------------------------------------------------------------------- 1054 // If we have found where the "_dyld_all_image_infos" lives in memory, 1055 // read the current info from it, and then update all image load 1056 // addresses (or lack thereof). Only do this if this is the first time 1057 // we're reading the dyld infos. Return true if we actually read anything, 1058 // and false otherwise. 1059 //---------------------------------------------------------------------- 1060 bool 1061 DynamicLoaderMacOSXDYLD::InitializeFromAllImageInfos () 1062 { 1063 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); 1064 1065 Mutex::Locker locker(m_mutex); 1066 if (m_process->GetStopID() == m_dyld_image_infos_stop_id 1067 || m_dyld_image_infos.size() != 0) 1068 return false; 1069 1070 if (ReadAllImageInfosStructure ()) 1071 { 1072 // Nothing to load or unload? 1073 if (m_dyld_all_image_infos.dylib_info_count == 0) 1074 return true; 1075 1076 if (m_dyld_all_image_infos.dylib_info_addr == 0) 1077 { 1078 // DYLD is updating the images now. So we should say we have no images, and then we'll 1079 // figure it out when we hit the added breakpoint. 1080 return false; 1081 } 1082 else 1083 { 1084 if (!AddModulesUsingImageInfosAddress (m_dyld_all_image_infos.dylib_info_addr, 1085 m_dyld_all_image_infos.dylib_info_count)) 1086 { 1087 DEBUG_PRINTF("%s", "unable to read all data for all_dylib_infos."); 1088 m_dyld_image_infos.clear(); 1089 } 1090 } 1091 1092 // Now we have one more bit of business. If there is a library left in the images for our target that 1093 // doesn't have a load address, then it must be something that we were expecting to load (for instance we 1094 // read a load command for it) but it didn't in fact load - probably because DYLD_*_PATH pointed 1095 // to an equivalent version. We don't want it to stay in the target's module list or it will confuse 1096 // us, so unload it here. 1097 Target &target = m_process->GetTarget(); 1098 const ModuleList &target_modules = target.GetImages(); 1099 ModuleList not_loaded_modules; 1100 Mutex::Locker modules_locker(target_modules.GetMutex()); 1101 1102 size_t num_modules = target_modules.GetSize(); 1103 for (size_t i = 0; i < num_modules; i++) 1104 { 1105 ModuleSP module_sp = target_modules.GetModuleAtIndexUnlocked (i); 1106 if (!module_sp->IsLoadedInTarget (&target)) 1107 { 1108 if (log) 1109 { 1110 StreamString s; 1111 module_sp->GetDescription (&s); 1112 log->Printf ("Unloading pre-run module: %s.", s.GetData ()); 1113 } 1114 not_loaded_modules.Append (module_sp); 1115 } 1116 } 1117 1118 if (not_loaded_modules.GetSize() != 0) 1119 { 1120 target.GetImages().Remove(not_loaded_modules); 1121 } 1122 1123 return true; 1124 } 1125 else 1126 return false; 1127 } 1128 1129 //---------------------------------------------------------------------- 1130 // Read a mach_header at ADDR into HEADER, and also fill in the load 1131 // command data into LOAD_COMMAND_DATA if it is non-NULL. 1132 // 1133 // Returns true if we succeed, false if we fail for any reason. 1134 //---------------------------------------------------------------------- 1135 bool 1136 DynamicLoaderMacOSXDYLD::ReadMachHeader (lldb::addr_t addr, llvm::MachO::mach_header *header, DataExtractor *load_command_data) 1137 { 1138 DataBufferHeap header_bytes(sizeof(llvm::MachO::mach_header), 0); 1139 Error error; 1140 size_t bytes_read = m_process->ReadMemory (addr, 1141 header_bytes.GetBytes(), 1142 header_bytes.GetByteSize(), 1143 error); 1144 if (bytes_read == sizeof(llvm::MachO::mach_header)) 1145 { 1146 lldb::offset_t offset = 0; 1147 ::memset (header, 0, sizeof(llvm::MachO::mach_header)); 1148 1149 // Get the magic byte unswapped so we can figure out what we are dealing with 1150 DataExtractor data(header_bytes.GetBytes(), header_bytes.GetByteSize(), lldb::endian::InlHostByteOrder(), 4); 1151 header->magic = data.GetU32(&offset); 1152 lldb::addr_t load_cmd_addr = addr; 1153 data.SetByteOrder(DynamicLoaderMacOSXDYLD::GetByteOrderFromMagic(header->magic)); 1154 switch (header->magic) 1155 { 1156 case llvm::MachO::MH_MAGIC: 1157 case llvm::MachO::MH_CIGAM: 1158 data.SetAddressByteSize(4); 1159 load_cmd_addr += sizeof(llvm::MachO::mach_header); 1160 break; 1161 1162 case llvm::MachO::MH_MAGIC_64: 1163 case llvm::MachO::MH_CIGAM_64: 1164 data.SetAddressByteSize(8); 1165 load_cmd_addr += sizeof(llvm::MachO::mach_header_64); 1166 break; 1167 1168 default: 1169 return false; 1170 } 1171 1172 // Read the rest of dyld's mach header 1173 if (data.GetU32(&offset, &header->cputype, (sizeof(llvm::MachO::mach_header)/sizeof(uint32_t)) - 1)) 1174 { 1175 if (load_command_data == NULL) 1176 return true; // We were able to read the mach_header and weren't asked to read the load command bytes 1177 1178 DataBufferSP load_cmd_data_sp(new DataBufferHeap(header->sizeofcmds, 0)); 1179 1180 size_t load_cmd_bytes_read = m_process->ReadMemory (load_cmd_addr, 1181 load_cmd_data_sp->GetBytes(), 1182 load_cmd_data_sp->GetByteSize(), 1183 error); 1184 1185 if (load_cmd_bytes_read == header->sizeofcmds) 1186 { 1187 // Set the load command data and also set the correct endian 1188 // swap settings and the correct address size 1189 load_command_data->SetData(load_cmd_data_sp, 0, header->sizeofcmds); 1190 load_command_data->SetByteOrder(data.GetByteOrder()); 1191 load_command_data->SetAddressByteSize(data.GetAddressByteSize()); 1192 return true; // We successfully read the mach_header and the load command data 1193 } 1194 1195 return false; // We weren't able to read the load command data 1196 } 1197 } 1198 return false; // We failed the read the mach_header 1199 } 1200 1201 1202 //---------------------------------------------------------------------- 1203 // Parse the load commands for an image 1204 //---------------------------------------------------------------------- 1205 uint32_t 1206 DynamicLoaderMacOSXDYLD::ParseLoadCommands (const DataExtractor& data, DYLDImageInfo& dylib_info, FileSpec *lc_id_dylinker) 1207 { 1208 lldb::offset_t offset = 0; 1209 uint32_t cmd_idx; 1210 Segment segment; 1211 dylib_info.Clear (true); 1212 1213 for (cmd_idx = 0; cmd_idx < dylib_info.header.ncmds; cmd_idx++) 1214 { 1215 // Clear out any load command specific data from DYLIB_INFO since 1216 // we are about to read it. 1217 1218 if (data.ValidOffsetForDataOfSize (offset, sizeof(llvm::MachO::load_command))) 1219 { 1220 llvm::MachO::load_command load_cmd; 1221 lldb::offset_t load_cmd_offset = offset; 1222 load_cmd.cmd = data.GetU32 (&offset); 1223 load_cmd.cmdsize = data.GetU32 (&offset); 1224 switch (load_cmd.cmd) 1225 { 1226 case llvm::MachO::LC_SEGMENT: 1227 { 1228 segment.name.SetTrimmedCStringWithLength ((const char *)data.GetData(&offset, 16), 16); 1229 // We are putting 4 uint32_t values 4 uint64_t values so 1230 // we have to use multiple 32 bit gets below. 1231 segment.vmaddr = data.GetU32 (&offset); 1232 segment.vmsize = data.GetU32 (&offset); 1233 segment.fileoff = data.GetU32 (&offset); 1234 segment.filesize = data.GetU32 (&offset); 1235 // Extract maxprot, initprot, nsects and flags all at once 1236 data.GetU32(&offset, &segment.maxprot, 4); 1237 dylib_info.segments.push_back (segment); 1238 } 1239 break; 1240 1241 case llvm::MachO::LC_SEGMENT_64: 1242 { 1243 segment.name.SetTrimmedCStringWithLength ((const char *)data.GetData(&offset, 16), 16); 1244 // Extract vmaddr, vmsize, fileoff, and filesize all at once 1245 data.GetU64(&offset, &segment.vmaddr, 4); 1246 // Extract maxprot, initprot, nsects and flags all at once 1247 data.GetU32(&offset, &segment.maxprot, 4); 1248 dylib_info.segments.push_back (segment); 1249 } 1250 break; 1251 1252 case llvm::MachO::LC_ID_DYLINKER: 1253 if (lc_id_dylinker) 1254 { 1255 const lldb::offset_t name_offset = load_cmd_offset + data.GetU32 (&offset); 1256 const char *path = data.PeekCStr (name_offset); 1257 lc_id_dylinker->SetFile (path, true); 1258 } 1259 break; 1260 1261 case llvm::MachO::LC_UUID: 1262 dylib_info.uuid.SetBytes(data.GetData (&offset, 16)); 1263 break; 1264 1265 default: 1266 break; 1267 } 1268 // Set offset to be the beginning of the next load command. 1269 offset = load_cmd_offset + load_cmd.cmdsize; 1270 } 1271 } 1272 1273 // All sections listed in the dyld image info structure will all 1274 // either be fixed up already, or they will all be off by a single 1275 // slide amount that is determined by finding the first segment 1276 // that is at file offset zero which also has bytes (a file size 1277 // that is greater than zero) in the object file. 1278 1279 // Determine the slide amount (if any) 1280 const size_t num_sections = dylib_info.segments.size(); 1281 for (size_t i = 0; i < num_sections; ++i) 1282 { 1283 // Iterate through the object file sections to find the 1284 // first section that starts of file offset zero and that 1285 // has bytes in the file... 1286 if (dylib_info.segments[i].fileoff == 0 && dylib_info.segments[i].filesize > 0) 1287 { 1288 dylib_info.slide = dylib_info.address - dylib_info.segments[i].vmaddr; 1289 // We have found the slide amount, so we can exit 1290 // this for loop. 1291 break; 1292 } 1293 } 1294 return cmd_idx; 1295 } 1296 1297 //---------------------------------------------------------------------- 1298 // Read the mach_header and load commands for each image that the 1299 // _dyld_all_image_infos structure points to and cache the results. 1300 //---------------------------------------------------------------------- 1301 1302 void 1303 DynamicLoaderMacOSXDYLD::UpdateImageInfosHeaderAndLoadCommands(DYLDImageInfo::collection &image_infos, 1304 uint32_t infos_count, 1305 bool update_executable) 1306 { 1307 uint32_t exe_idx = UINT32_MAX; 1308 // Read any UUID values that we can get 1309 for (uint32_t i = 0; i < infos_count; i++) 1310 { 1311 if (!image_infos[i].UUIDValid()) 1312 { 1313 DataExtractor data; // Load command data 1314 if (!ReadMachHeader (image_infos[i].address, &image_infos[i].header, &data)) 1315 continue; 1316 1317 ParseLoadCommands (data, image_infos[i], NULL); 1318 1319 if (image_infos[i].header.filetype == llvm::MachO::MH_EXECUTE) 1320 exe_idx = i; 1321 1322 } 1323 } 1324 1325 Target &target = m_process->GetTarget(); 1326 1327 if (exe_idx < image_infos.size()) 1328 { 1329 const bool can_create = true; 1330 ModuleSP exe_module_sp (FindTargetModuleForDYLDImageInfo (image_infos[exe_idx], can_create, NULL)); 1331 1332 if (exe_module_sp) 1333 { 1334 UpdateImageLoadAddress (exe_module_sp.get(), image_infos[exe_idx]); 1335 1336 if (exe_module_sp.get() != target.GetExecutableModulePointer()) 1337 { 1338 // Don't load dependent images since we are in dyld where we will know 1339 // and find out about all images that are loaded. Also when setting the 1340 // executable module, it will clear the targets module list, and if we 1341 // have an in memory dyld module, it will get removed from the list 1342 // so we will need to add it back after setting the executable module, 1343 // so we first try and see if we already have a weak pointer to the 1344 // dyld module, make it into a shared pointer, then add the executable, 1345 // then re-add it back to make sure it is always in the list. 1346 ModuleSP dyld_module_sp(m_dyld_module_wp.lock()); 1347 1348 const bool get_dependent_images = false; 1349 m_process->GetTarget().SetExecutableModule (exe_module_sp, 1350 get_dependent_images); 1351 1352 if (dyld_module_sp) 1353 target.GetImages().AppendIfNeeded (dyld_module_sp); 1354 } 1355 } 1356 } 1357 } 1358 1359 //---------------------------------------------------------------------- 1360 // On Mac OS X libobjc (the Objective-C runtime) has several critical dispatch 1361 // functions written in hand-written assembly, and also have hand-written unwind 1362 // information in the eh_frame section. Normally we prefer analyzing the 1363 // assembly instructions of a curently executing frame to unwind from that frame -- 1364 // but on hand-written functions this profiling can fail. We should use the 1365 // eh_frame instructions for these functions all the time. 1366 // 1367 // As an aside, it would be better if the eh_frame entries had a flag (or were 1368 // extensible so they could have an Apple-specific flag) which indicates that 1369 // the instructions are asynchronous -- accurate at every instruction, instead 1370 // of our normal default assumption that they are not. 1371 //---------------------------------------------------------------------- 1372 1373 bool 1374 DynamicLoaderMacOSXDYLD::AlwaysRelyOnEHUnwindInfo (SymbolContext &sym_ctx) 1375 { 1376 ModuleSP module_sp; 1377 if (sym_ctx.symbol) 1378 { 1379 module_sp = sym_ctx.symbol->GetAddress().GetModule(); 1380 } 1381 if (module_sp.get() == NULL && sym_ctx.function) 1382 { 1383 module_sp = sym_ctx.function->GetAddressRange().GetBaseAddress().GetModule(); 1384 } 1385 if (module_sp.get() == NULL) 1386 return false; 1387 1388 ObjCLanguageRuntime *objc_runtime = m_process->GetObjCLanguageRuntime(); 1389 if (objc_runtime != NULL && objc_runtime->IsModuleObjCLibrary (module_sp)) 1390 { 1391 return true; 1392 } 1393 1394 return false; 1395 } 1396 1397 1398 1399 //---------------------------------------------------------------------- 1400 // Dump a Segment to the file handle provided. 1401 //---------------------------------------------------------------------- 1402 void 1403 DynamicLoaderMacOSXDYLD::Segment::PutToLog (Log *log, lldb::addr_t slide) const 1404 { 1405 if (log) 1406 { 1407 if (slide == 0) 1408 log->Printf ("\t\t%16s [0x%16.16" PRIx64 " - 0x%16.16" PRIx64 ")", 1409 name.AsCString(""), 1410 vmaddr + slide, 1411 vmaddr + slide + vmsize); 1412 else 1413 log->Printf ("\t\t%16s [0x%16.16" PRIx64 " - 0x%16.16" PRIx64 ") slide = 0x%" PRIx64, 1414 name.AsCString(""), 1415 vmaddr + slide, 1416 vmaddr + slide + vmsize, 1417 slide); 1418 } 1419 } 1420 1421 const DynamicLoaderMacOSXDYLD::Segment * 1422 DynamicLoaderMacOSXDYLD::DYLDImageInfo::FindSegment (const ConstString &name) const 1423 { 1424 const size_t num_segments = segments.size(); 1425 for (size_t i=0; i<num_segments; ++i) 1426 { 1427 if (segments[i].name == name) 1428 return &segments[i]; 1429 } 1430 return NULL; 1431 } 1432 1433 1434 //---------------------------------------------------------------------- 1435 // Dump an image info structure to the file handle provided. 1436 //---------------------------------------------------------------------- 1437 void 1438 DynamicLoaderMacOSXDYLD::DYLDImageInfo::PutToLog (Log *log) const 1439 { 1440 if (log == NULL) 1441 return; 1442 uint8_t *u = (uint8_t *)uuid.GetBytes(); 1443 1444 if (address == LLDB_INVALID_ADDRESS) 1445 { 1446 if (u) 1447 { 1448 log->Printf("\t modtime=0x%8.8" PRIx64 " uuid=%2.2X%2.2X%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X%2.2X%2.2X%2.2X%2.2X path='%s' (UNLOADED)", 1449 mod_date, 1450 u[ 0], u[ 1], u[ 2], u[ 3], 1451 u[ 4], u[ 5], u[ 6], u[ 7], 1452 u[ 8], u[ 9], u[10], u[11], 1453 u[12], u[13], u[14], u[15], 1454 file_spec.GetPath().c_str()); 1455 } 1456 else 1457 log->Printf("\t modtime=0x%8.8" PRIx64 " path='%s' (UNLOADED)", 1458 mod_date, 1459 file_spec.GetPath().c_str()); 1460 } 1461 else 1462 { 1463 if (u) 1464 { 1465 log->Printf("\taddress=0x%16.16" PRIx64 " modtime=0x%8.8" PRIx64 " uuid=%2.2X%2.2X%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X%2.2X%2.2X%2.2X%2.2X path='%s'", 1466 address, 1467 mod_date, 1468 u[ 0], u[ 1], u[ 2], u[ 3], 1469 u[ 4], u[ 5], u[ 6], u[ 7], 1470 u[ 8], u[ 9], u[10], u[11], 1471 u[12], u[13], u[14], u[15], 1472 file_spec.GetPath().c_str()); 1473 } 1474 else 1475 { 1476 log->Printf("\taddress=0x%16.16" PRIx64 " modtime=0x%8.8" PRIx64 " path='%s'", 1477 address, 1478 mod_date, 1479 file_spec.GetPath().c_str()); 1480 1481 } 1482 for (uint32_t i=0; i<segments.size(); ++i) 1483 segments[i].PutToLog(log, slide); 1484 } 1485 } 1486 1487 //---------------------------------------------------------------------- 1488 // Dump the _dyld_all_image_infos members and all current image infos 1489 // that we have parsed to the file handle provided. 1490 //---------------------------------------------------------------------- 1491 void 1492 DynamicLoaderMacOSXDYLD::PutToLog(Log *log) const 1493 { 1494 if (log == NULL) 1495 return; 1496 1497 Mutex::Locker locker(m_mutex); 1498 log->Printf("dyld_all_image_infos = { version=%d, count=%d, addr=0x%8.8" PRIx64 ", notify=0x%8.8" PRIx64 " }", 1499 m_dyld_all_image_infos.version, 1500 m_dyld_all_image_infos.dylib_info_count, 1501 (uint64_t)m_dyld_all_image_infos.dylib_info_addr, 1502 (uint64_t)m_dyld_all_image_infos.notification); 1503 size_t i; 1504 const size_t count = m_dyld_image_infos.size(); 1505 if (count > 0) 1506 { 1507 log->PutCString("Loaded:"); 1508 for (i = 0; i<count; i++) 1509 m_dyld_image_infos[i].PutToLog(log); 1510 } 1511 } 1512 1513 void 1514 DynamicLoaderMacOSXDYLD::PrivateInitialize(Process *process) 1515 { 1516 DEBUG_PRINTF("DynamicLoaderMacOSXDYLD::%s() process state = %s\n", __FUNCTION__, StateAsCString(m_process->GetState())); 1517 Clear(true); 1518 m_process = process; 1519 m_process->GetTarget().ClearAllLoadedSections(); 1520 } 1521 1522 bool 1523 DynamicLoaderMacOSXDYLD::SetNotificationBreakpoint () 1524 { 1525 DEBUG_PRINTF("DynamicLoaderMacOSXDYLD::%s() process state = %s\n", __FUNCTION__, StateAsCString(m_process->GetState())); 1526 if (m_break_id == LLDB_INVALID_BREAK_ID) 1527 { 1528 if (m_dyld_all_image_infos.notification != LLDB_INVALID_ADDRESS) 1529 { 1530 Address so_addr; 1531 // Set the notification breakpoint and install a breakpoint 1532 // callback function that will get called each time the 1533 // breakpoint gets hit. We will use this to track when shared 1534 // libraries get loaded/unloaded. 1535 bool resolved = m_process->GetTarget().ResolveLoadAddress(m_dyld_all_image_infos.notification, so_addr); 1536 if (!resolved) 1537 { 1538 ModuleSP dyld_module_sp = m_dyld_module_wp.lock(); 1539 if (dyld_module_sp) 1540 { 1541 UpdateImageLoadAddress (dyld_module_sp.get(), m_dyld); 1542 resolved = m_process->GetTarget().ResolveLoadAddress(m_dyld_all_image_infos.notification, so_addr); 1543 } 1544 } 1545 1546 if (resolved) 1547 { 1548 Breakpoint *dyld_break = m_process->GetTarget().CreateBreakpoint (so_addr, true, false).get(); 1549 dyld_break->SetCallback (DynamicLoaderMacOSXDYLD::NotifyBreakpointHit, this, true); 1550 dyld_break->SetBreakpointKind ("shared-library-event"); 1551 m_break_id = dyld_break->GetID(); 1552 } 1553 } 1554 } 1555 return m_break_id != LLDB_INVALID_BREAK_ID; 1556 } 1557 1558 //---------------------------------------------------------------------- 1559 // Member function that gets called when the process state changes. 1560 //---------------------------------------------------------------------- 1561 void 1562 DynamicLoaderMacOSXDYLD::PrivateProcessStateChanged (Process *process, StateType state) 1563 { 1564 DEBUG_PRINTF("DynamicLoaderMacOSXDYLD::%s(%s)\n", __FUNCTION__, StateAsCString(state)); 1565 switch (state) 1566 { 1567 case eStateConnected: 1568 case eStateAttaching: 1569 case eStateLaunching: 1570 case eStateInvalid: 1571 case eStateUnloaded: 1572 case eStateExited: 1573 case eStateDetached: 1574 Clear(false); 1575 break; 1576 1577 case eStateStopped: 1578 // Keep trying find dyld and set our notification breakpoint each time 1579 // we stop until we succeed 1580 if (!DidSetNotificationBreakpoint () && m_process->IsAlive()) 1581 { 1582 if (NeedToLocateDYLD ()) 1583 LocateDYLD (); 1584 1585 SetNotificationBreakpoint (); 1586 } 1587 break; 1588 1589 case eStateRunning: 1590 case eStateStepping: 1591 case eStateCrashed: 1592 case eStateSuspended: 1593 break; 1594 } 1595 } 1596 1597 ThreadPlanSP 1598 DynamicLoaderMacOSXDYLD::GetStepThroughTrampolinePlan (Thread &thread, bool stop_others) 1599 { 1600 ThreadPlanSP thread_plan_sp; 1601 StackFrame *current_frame = thread.GetStackFrameAtIndex(0).get(); 1602 const SymbolContext ¤t_context = current_frame->GetSymbolContext(eSymbolContextSymbol); 1603 Symbol *current_symbol = current_context.symbol; 1604 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 1605 TargetSP target_sp (thread.CalculateTarget()); 1606 1607 if (current_symbol != NULL) 1608 { 1609 std::vector<Address> addresses; 1610 1611 if (current_symbol->IsTrampoline()) 1612 { 1613 const ConstString &trampoline_name = current_symbol->GetMangled().GetName(Mangled::ePreferMangled); 1614 1615 if (trampoline_name) 1616 { 1617 const ModuleList &images = target_sp->GetImages(); 1618 1619 SymbolContextList code_symbols; 1620 images.FindSymbolsWithNameAndType(trampoline_name, eSymbolTypeCode, code_symbols); 1621 size_t num_code_symbols = code_symbols.GetSize(); 1622 1623 if (num_code_symbols > 0) 1624 { 1625 for (uint32_t i = 0; i < num_code_symbols; i++) 1626 { 1627 SymbolContext context; 1628 AddressRange addr_range; 1629 if (code_symbols.GetContextAtIndex(i, context)) 1630 { 1631 context.GetAddressRange (eSymbolContextEverything, 0, false, addr_range); 1632 addresses.push_back(addr_range.GetBaseAddress()); 1633 if (log) 1634 { 1635 addr_t load_addr = addr_range.GetBaseAddress().GetLoadAddress(target_sp.get()); 1636 1637 log->Printf ("Found a trampoline target symbol at 0x%" PRIx64 ".", load_addr); 1638 } 1639 } 1640 } 1641 } 1642 1643 SymbolContextList reexported_symbols; 1644 images.FindSymbolsWithNameAndType(trampoline_name, eSymbolTypeReExported, reexported_symbols); 1645 size_t num_reexported_symbols = reexported_symbols.GetSize(); 1646 if (num_reexported_symbols > 0) 1647 { 1648 for (uint32_t i = 0; i < num_reexported_symbols; i++) 1649 { 1650 SymbolContext context; 1651 if (reexported_symbols.GetContextAtIndex(i, context)) 1652 { 1653 if (context.symbol) 1654 { 1655 Symbol *actual_symbol = context.symbol->ResolveReExportedSymbol(*target_sp.get()); 1656 if (actual_symbol) 1657 { 1658 if (actual_symbol->GetAddress().IsValid()) 1659 { 1660 addresses.push_back(actual_symbol->GetAddress()); 1661 if (log) 1662 { 1663 lldb::addr_t load_addr = actual_symbol->GetAddress().GetLoadAddress(target_sp.get()); 1664 log->Printf ("Found a re-exported symbol: %s at 0x%" PRIx64 ".", 1665 actual_symbol->GetName().GetCString(), load_addr); 1666 } 1667 } 1668 } 1669 } 1670 } 1671 } 1672 } 1673 1674 SymbolContextList indirect_symbols; 1675 images.FindSymbolsWithNameAndType(trampoline_name, eSymbolTypeResolver, indirect_symbols); 1676 size_t num_indirect_symbols = indirect_symbols.GetSize(); 1677 if (num_indirect_symbols > 0) 1678 { 1679 for (uint32_t i = 0; i < num_indirect_symbols; i++) 1680 { 1681 SymbolContext context; 1682 AddressRange addr_range; 1683 if (indirect_symbols.GetContextAtIndex(i, context)) 1684 { 1685 context.GetAddressRange (eSymbolContextEverything, 0, false, addr_range); 1686 addresses.push_back(addr_range.GetBaseAddress()); 1687 if (log) 1688 { 1689 addr_t load_addr = addr_range.GetBaseAddress().GetLoadAddress(target_sp.get()); 1690 1691 log->Printf ("Found an indirect target symbol at 0x%" PRIx64 ".", load_addr); 1692 } 1693 } 1694 } 1695 } 1696 } 1697 } 1698 else if (current_symbol->GetType() == eSymbolTypeReExported) 1699 { 1700 // I am not sure we could ever end up stopped AT a re-exported symbol. But just in case: 1701 1702 const Symbol *actual_symbol = current_symbol->ResolveReExportedSymbol(*(target_sp.get())); 1703 if (actual_symbol) 1704 { 1705 Address target_addr(actual_symbol->GetAddress()); 1706 if (target_addr.IsValid()) 1707 { 1708 if (log) 1709 log->Printf ("Found a re-exported symbol: %s pointing to: %s at 0x%" PRIx64 ".", 1710 current_symbol->GetName().GetCString(), 1711 actual_symbol->GetName().GetCString(), 1712 target_addr.GetLoadAddress(target_sp.get())); 1713 addresses.push_back (target_addr.GetLoadAddress(target_sp.get())); 1714 1715 } 1716 } 1717 } 1718 1719 if (addresses.size() > 0) 1720 { 1721 // First check whether any of the addresses point to Indirect symbols, and if they do, resolve them: 1722 std::vector<lldb::addr_t> load_addrs; 1723 for (Address address : addresses) 1724 { 1725 Symbol *symbol = address.CalculateSymbolContextSymbol(); 1726 if (symbol && symbol->IsIndirect()) 1727 { 1728 Error error; 1729 addr_t resolved_addr = thread.GetProcess()->ResolveIndirectFunction(&symbol->GetAddress(), error); 1730 if (error.Success()) 1731 { 1732 load_addrs.push_back(resolved_addr); 1733 if (log) 1734 log->Printf("ResolveIndirectFunction found resolved target for %s at 0x%" PRIx64 ".", 1735 symbol->GetName().GetCString(), resolved_addr); 1736 } 1737 } 1738 else 1739 { 1740 load_addrs.push_back(address.GetLoadAddress(target_sp.get())); 1741 } 1742 1743 } 1744 thread_plan_sp.reset (new ThreadPlanRunToAddress (thread, load_addrs, stop_others)); 1745 } 1746 } 1747 else 1748 { 1749 if (log) 1750 log->Printf ("Could not find symbol for step through."); 1751 } 1752 1753 return thread_plan_sp; 1754 } 1755 1756 size_t 1757 DynamicLoaderMacOSXDYLD::FindEquivalentSymbols (lldb_private::Symbol *original_symbol, 1758 lldb_private::ModuleList &images, 1759 lldb_private::SymbolContextList &equivalent_symbols) 1760 { 1761 const ConstString &trampoline_name = original_symbol->GetMangled().GetName(Mangled::ePreferMangled); 1762 if (!trampoline_name) 1763 return 0; 1764 1765 size_t initial_size = equivalent_symbols.GetSize(); 1766 1767 static const char *resolver_name_regex = "(_gc|_non_gc|\\$[A-Za-z0-9\\$]+)$"; 1768 std::string equivalent_regex_buf("^"); 1769 equivalent_regex_buf.append (trampoline_name.GetCString()); 1770 equivalent_regex_buf.append (resolver_name_regex); 1771 1772 RegularExpression equivalent_name_regex (equivalent_regex_buf.c_str()); 1773 const bool append = true; 1774 images.FindSymbolsMatchingRegExAndType (equivalent_name_regex, eSymbolTypeCode, equivalent_symbols, append); 1775 1776 return equivalent_symbols.GetSize() - initial_size; 1777 } 1778 1779 Error 1780 DynamicLoaderMacOSXDYLD::CanLoadImage () 1781 { 1782 Error error; 1783 // In order for us to tell if we can load a shared library we verify that 1784 // the dylib_info_addr isn't zero (which means no shared libraries have 1785 // been set yet, or dyld is currently mucking with the shared library list). 1786 if (ReadAllImageInfosStructure ()) 1787 { 1788 // TODO: also check the _dyld_global_lock_held variable in libSystem.B.dylib? 1789 // TODO: check the malloc lock? 1790 // TODO: check the objective C lock? 1791 if (m_dyld_all_image_infos.dylib_info_addr != 0) 1792 return error; // Success 1793 } 1794 1795 error.SetErrorString("unsafe to load or unload shared libraries"); 1796 return error; 1797 } 1798 1799 void 1800 DynamicLoaderMacOSXDYLD::Initialize() 1801 { 1802 PluginManager::RegisterPlugin (GetPluginNameStatic(), 1803 GetPluginDescriptionStatic(), 1804 CreateInstance); 1805 } 1806 1807 void 1808 DynamicLoaderMacOSXDYLD::Terminate() 1809 { 1810 PluginManager::UnregisterPlugin (CreateInstance); 1811 } 1812 1813 1814 lldb_private::ConstString 1815 DynamicLoaderMacOSXDYLD::GetPluginNameStatic() 1816 { 1817 static ConstString g_name("macosx-dyld"); 1818 return g_name; 1819 } 1820 1821 const char * 1822 DynamicLoaderMacOSXDYLD::GetPluginDescriptionStatic() 1823 { 1824 return "Dynamic loader plug-in that watches for shared library loads/unloads in MacOSX user processes."; 1825 } 1826 1827 1828 //------------------------------------------------------------------ 1829 // PluginInterface protocol 1830 //------------------------------------------------------------------ 1831 lldb_private::ConstString 1832 DynamicLoaderMacOSXDYLD::GetPluginName() 1833 { 1834 return GetPluginNameStatic(); 1835 } 1836 1837 uint32_t 1838 DynamicLoaderMacOSXDYLD::GetPluginVersion() 1839 { 1840 return 1; 1841 } 1842 1843 uint32_t 1844 DynamicLoaderMacOSXDYLD::AddrByteSize() 1845 { 1846 switch (m_dyld.header.magic) 1847 { 1848 case llvm::MachO::MH_MAGIC: 1849 case llvm::MachO::MH_CIGAM: 1850 return 4; 1851 1852 case llvm::MachO::MH_MAGIC_64: 1853 case llvm::MachO::MH_CIGAM_64: 1854 return 8; 1855 1856 default: 1857 break; 1858 } 1859 return 0; 1860 } 1861 1862 lldb::ByteOrder 1863 DynamicLoaderMacOSXDYLD::GetByteOrderFromMagic (uint32_t magic) 1864 { 1865 switch (magic) 1866 { 1867 case llvm::MachO::MH_MAGIC: 1868 case llvm::MachO::MH_MAGIC_64: 1869 return lldb::endian::InlHostByteOrder(); 1870 1871 case llvm::MachO::MH_CIGAM: 1872 case llvm::MachO::MH_CIGAM_64: 1873 if (lldb::endian::InlHostByteOrder() == lldb::eByteOrderBig) 1874 return lldb::eByteOrderLittle; 1875 else 1876 return lldb::eByteOrderBig; 1877 1878 default: 1879 break; 1880 } 1881 return lldb::eByteOrderInvalid; 1882 } 1883 1884 lldb::ByteOrder 1885 DynamicLoaderMacOSXDYLD::DYLDImageInfo::GetByteOrder() 1886 { 1887 return DynamicLoaderMacOSXDYLD::GetByteOrderFromMagic(header.magic); 1888 } 1889 1890