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 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::aarch64) 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); 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 (void) count_v13; // Avoid warnings when assertions are off. 714 assert (sizeof (buf) >= count_v13); 715 716 Error error; 717 if (m_process->ReadMemory (m_dyld_all_image_infos_addr, buf, 4, error) == 4) 718 { 719 m_dyld_all_image_infos.version = data.GetU32(&offset); 720 // If anything in the high byte is set, we probably got the byte 721 // order incorrect (the process might not have it set correctly 722 // yet due to attaching to a program without a specified file). 723 if (m_dyld_all_image_infos.version & 0xff000000) 724 { 725 // We have guessed the wrong byte order. Swap it and try 726 // reading the version again. 727 if (byte_order == eByteOrderLittle) 728 byte_order = eByteOrderBig; 729 else 730 byte_order = eByteOrderLittle; 731 732 data.SetByteOrder (byte_order); 733 offset = 0; 734 m_dyld_all_image_infos.version = data.GetU32(&offset); 735 } 736 } 737 else 738 { 739 return false; 740 } 741 742 const size_t count = (m_dyld_all_image_infos.version >= 11) ? count_v11 : count_v2; 743 744 const size_t bytes_read = m_process->ReadMemory (m_dyld_all_image_infos_addr, buf, count, error); 745 if (bytes_read == count) 746 { 747 offset = 0; 748 m_dyld_all_image_infos.version = data.GetU32(&offset); 749 m_dyld_all_image_infos.dylib_info_count = data.GetU32(&offset); 750 m_dyld_all_image_infos.dylib_info_addr = data.GetPointer(&offset); 751 m_dyld_all_image_infos.notification = data.GetPointer(&offset); 752 m_dyld_all_image_infos.processDetachedFromSharedRegion = data.GetU8(&offset); 753 m_dyld_all_image_infos.libSystemInitialized = data.GetU8(&offset); 754 // Adjust for padding. 755 offset += addr_size - 2; 756 m_dyld_all_image_infos.dyldImageLoadAddress = data.GetPointer(&offset); 757 if (m_dyld_all_image_infos.version >= 11) 758 { 759 offset += addr_size * 8; 760 uint64_t dyld_all_image_infos_addr = data.GetPointer(&offset); 761 762 // When we started, we were given the actual address of the all_image_infos 763 // struct (probably via TASK_DYLD_INFO) in memory - this address is stored in 764 // m_dyld_all_image_infos_addr and is the most accurate address we have. 765 766 // We read the dyld_all_image_infos struct from memory; it contains its own address. 767 // If the address in the struct does not match the actual address, 768 // the dyld we're looking at has been loaded at a different location (slid) from 769 // where it intended to load. The addresses in the dyld_all_image_infos struct 770 // are the original, non-slid addresses, and need to be adjusted. Most importantly 771 // the address of dyld and the notification address need to be adjusted. 772 773 if (dyld_all_image_infos_addr != m_dyld_all_image_infos_addr) 774 { 775 uint64_t image_infos_offset = dyld_all_image_infos_addr - m_dyld_all_image_infos.dyldImageLoadAddress; 776 uint64_t notification_offset = m_dyld_all_image_infos.notification - m_dyld_all_image_infos.dyldImageLoadAddress; 777 m_dyld_all_image_infos.dyldImageLoadAddress = m_dyld_all_image_infos_addr - image_infos_offset; 778 m_dyld_all_image_infos.notification = m_dyld_all_image_infos.dyldImageLoadAddress + notification_offset; 779 } 780 } 781 m_dyld_all_image_infos_stop_id = m_process->GetStopID(); 782 return true; 783 } 784 } 785 return false; 786 } 787 788 789 bool 790 DynamicLoaderMacOSXDYLD::AddModulesUsingImageInfosAddress (lldb::addr_t image_infos_addr, uint32_t image_infos_count) 791 { 792 DYLDImageInfo::collection image_infos; 793 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); 794 if (log) 795 log->Printf ("Adding %d modules.\n", image_infos_count); 796 797 Mutex::Locker locker(m_mutex); 798 if (m_process->GetStopID() == m_dyld_image_infos_stop_id) 799 return true; 800 801 if (!ReadImageInfos (image_infos_addr, image_infos_count, image_infos)) 802 return false; 803 804 UpdateImageInfosHeaderAndLoadCommands (image_infos, image_infos_count, false); 805 bool return_value = AddModulesUsingImageInfos (image_infos); 806 m_dyld_image_infos_stop_id = m_process->GetStopID(); 807 return return_value; 808 } 809 810 // Adds the modules in image_infos to m_dyld_image_infos. 811 // NB don't call this passing in m_dyld_image_infos. 812 813 bool 814 DynamicLoaderMacOSXDYLD::AddModulesUsingImageInfos (DYLDImageInfo::collection &image_infos) 815 { 816 // Now add these images to the main list. 817 ModuleList loaded_module_list; 818 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); 819 Target &target = m_process->GetTarget(); 820 ModuleList& target_images = target.GetImages(); 821 822 for (uint32_t idx = 0; idx < image_infos.size(); ++idx) 823 { 824 if (log) 825 { 826 log->Printf ("Adding new image at address=0x%16.16" PRIx64 ".", image_infos[idx].address); 827 image_infos[idx].PutToLog (log); 828 } 829 830 m_dyld_image_infos.push_back(image_infos[idx]); 831 832 ModuleSP image_module_sp (FindTargetModuleForDYLDImageInfo (image_infos[idx], true, NULL)); 833 834 if (image_module_sp) 835 { 836 ObjectFile *objfile = image_module_sp->GetObjectFile (); 837 if (objfile) 838 { 839 SectionList *sections = objfile->GetSectionList(); 840 if (sections) 841 { 842 ConstString commpage_dbstr("__commpage"); 843 Section *commpage_section = sections->FindSectionByName(commpage_dbstr).get(); 844 if (commpage_section) 845 { 846 ModuleSpec module_spec (objfile->GetFileSpec(), image_infos[idx].GetArchitecture ()); 847 module_spec.GetObjectName() = commpage_dbstr; 848 ModuleSP commpage_image_module_sp(target_images.FindFirstModule (module_spec)); 849 if (!commpage_image_module_sp) 850 { 851 module_spec.SetObjectOffset (objfile->GetFileOffset() + commpage_section->GetFileOffset()); 852 commpage_image_module_sp = target.GetSharedModule (module_spec); 853 if (!commpage_image_module_sp || commpage_image_module_sp->GetObjectFile() == NULL) 854 { 855 commpage_image_module_sp = m_process->ReadModuleFromMemory (image_infos[idx].file_spec, 856 image_infos[idx].address); 857 // Always load a memory image right away in the target in case 858 // we end up trying to read the symbol table from memory... The 859 // __LINKEDIT will need to be mapped so we can figure out where 860 // the symbol table bits are... 861 bool changed = false; 862 UpdateImageLoadAddress (commpage_image_module_sp.get(), image_infos[idx]); 863 target.GetImages().Append(commpage_image_module_sp); 864 if (changed) 865 { 866 image_infos[idx].load_stop_id = m_process->GetStopID(); 867 loaded_module_list.AppendIfNeeded (commpage_image_module_sp); 868 } 869 } 870 } 871 } 872 } 873 } 874 875 // UpdateImageLoadAddress will return true if any segments 876 // change load address. We need to check this so we don't 877 // mention that all loaded shared libraries are newly loaded 878 // each time we hit out dyld breakpoint since dyld will list all 879 // shared libraries each time. 880 if (UpdateImageLoadAddress (image_module_sp.get(), image_infos[idx])) 881 { 882 target_images.AppendIfNeeded(image_module_sp); 883 loaded_module_list.AppendIfNeeded (image_module_sp); 884 } 885 } 886 } 887 888 if (loaded_module_list.GetSize() > 0) 889 { 890 // FIXME: This should really be in the Runtime handlers class, which should get 891 // called by the target's ModulesDidLoad, but we're doing it all locally for now 892 // to save time. 893 // Also, I'm assuming there can be only one libobjc dylib loaded... 894 895 ObjCLanguageRuntime *objc_runtime = m_process->GetObjCLanguageRuntime(true); 896 if (objc_runtime != NULL && !objc_runtime->HasReadObjCLibrary()) 897 { 898 size_t num_modules = loaded_module_list.GetSize(); 899 for (size_t i = 0; i < num_modules; i++) 900 { 901 if (objc_runtime->IsModuleObjCLibrary (loaded_module_list.GetModuleAtIndex (i))) 902 { 903 objc_runtime->ReadObjCLibrary (loaded_module_list.GetModuleAtIndex (i)); 904 break; 905 } 906 } 907 } 908 if (log) 909 loaded_module_list.LogUUIDAndPaths (log, "DynamicLoaderMacOSXDYLD::ModulesDidLoad"); 910 m_process->GetTarget().ModulesDidLoad (loaded_module_list); 911 } 912 return true; 913 } 914 915 bool 916 DynamicLoaderMacOSXDYLD::RemoveModulesUsingImageInfosAddress (lldb::addr_t image_infos_addr, uint32_t image_infos_count) 917 { 918 DYLDImageInfo::collection image_infos; 919 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); 920 921 Mutex::Locker locker(m_mutex); 922 if (m_process->GetStopID() == m_dyld_image_infos_stop_id) 923 return true; 924 925 // First read in the image_infos for the removed modules, and their headers & load commands. 926 if (!ReadImageInfos (image_infos_addr, image_infos_count, image_infos)) 927 { 928 if (log) 929 log->PutCString ("Failed reading image infos array."); 930 return false; 931 } 932 933 if (log) 934 log->Printf ("Removing %d modules.", image_infos_count); 935 936 ModuleList unloaded_module_list; 937 for (uint32_t idx = 0; idx < image_infos.size(); ++idx) 938 { 939 if (log) 940 { 941 log->Printf ("Removing module at address=0x%16.16" PRIx64 ".", image_infos[idx].address); 942 image_infos[idx].PutToLog (log); 943 } 944 945 // Remove this image_infos from the m_all_image_infos. We do the comparison by address 946 // rather than by file spec because we can have many modules with the same "file spec" in the 947 // case that they are modules loaded from memory. 948 // 949 // Also copy over the uuid from the old entry to the removed entry so we can 950 // use it to lookup the module in the module list. 951 952 DYLDImageInfo::collection::iterator pos, end = m_dyld_image_infos.end(); 953 for (pos = m_dyld_image_infos.begin(); pos != end; pos++) 954 { 955 if (image_infos[idx].address == (*pos).address) 956 { 957 image_infos[idx].uuid = (*pos).uuid; 958 959 // Add the module from this image_info to the "unloaded_module_list". We'll remove them all at 960 // one go later on. 961 962 ModuleSP unload_image_module_sp (FindTargetModuleForDYLDImageInfo (image_infos[idx], false, NULL)); 963 if (unload_image_module_sp.get()) 964 { 965 // When we unload, be sure to use the image info from the old list, 966 // since that has sections correctly filled in. 967 UnloadImageLoadAddress (unload_image_module_sp.get(), *pos); 968 unloaded_module_list.AppendIfNeeded (unload_image_module_sp); 969 } 970 else 971 { 972 if (log) 973 { 974 log->Printf ("Could not find module for unloading info entry:"); 975 image_infos[idx].PutToLog(log); 976 } 977 } 978 979 // Then remove it from the m_dyld_image_infos: 980 981 m_dyld_image_infos.erase(pos); 982 break; 983 } 984 } 985 986 if (pos == end) 987 { 988 if (log) 989 { 990 log->Printf ("Could not find image_info entry for unloading image:"); 991 image_infos[idx].PutToLog(log); 992 } 993 } 994 } 995 if (unloaded_module_list.GetSize() > 0) 996 { 997 if (log) 998 { 999 log->PutCString("Unloaded:"); 1000 unloaded_module_list.LogUUIDAndPaths (log, "DynamicLoaderMacOSXDYLD::ModulesDidUnload"); 1001 } 1002 m_process->GetTarget().GetImages().Remove (unloaded_module_list); 1003 } 1004 m_dyld_image_infos_stop_id = m_process->GetStopID(); 1005 return true; 1006 } 1007 1008 bool 1009 DynamicLoaderMacOSXDYLD::ReadImageInfos (lldb::addr_t image_infos_addr, 1010 uint32_t image_infos_count, 1011 DYLDImageInfo::collection &image_infos) 1012 { 1013 const ByteOrder endian = m_dyld.GetByteOrder(); 1014 const uint32_t addr_size = m_dyld.GetAddressByteSize(); 1015 1016 image_infos.resize(image_infos_count); 1017 const size_t count = image_infos.size() * 3 * addr_size; 1018 DataBufferHeap info_data(count, 0); 1019 Error error; 1020 const size_t bytes_read = m_process->ReadMemory (image_infos_addr, 1021 info_data.GetBytes(), 1022 info_data.GetByteSize(), 1023 error); 1024 if (bytes_read == count) 1025 { 1026 lldb::offset_t info_data_offset = 0; 1027 DataExtractor info_data_ref(info_data.GetBytes(), info_data.GetByteSize(), endian, addr_size); 1028 for (size_t i = 0; i < image_infos.size() && info_data_ref.ValidOffset(info_data_offset); i++) 1029 { 1030 image_infos[i].address = info_data_ref.GetPointer(&info_data_offset); 1031 lldb::addr_t path_addr = info_data_ref.GetPointer(&info_data_offset); 1032 image_infos[i].mod_date = info_data_ref.GetPointer(&info_data_offset); 1033 1034 char raw_path[PATH_MAX]; 1035 m_process->ReadCStringFromMemory (path_addr, raw_path, sizeof(raw_path), error); 1036 // don't resolve the path 1037 if (error.Success()) 1038 { 1039 const bool resolve_path = false; 1040 image_infos[i].file_spec.SetFile(raw_path, resolve_path); 1041 } 1042 } 1043 return true; 1044 } 1045 else 1046 { 1047 return false; 1048 } 1049 } 1050 1051 //---------------------------------------------------------------------- 1052 // If we have found where the "_dyld_all_image_infos" lives in memory, 1053 // read the current info from it, and then update all image load 1054 // addresses (or lack thereof). Only do this if this is the first time 1055 // we're reading the dyld infos. Return true if we actually read anything, 1056 // and false otherwise. 1057 //---------------------------------------------------------------------- 1058 bool 1059 DynamicLoaderMacOSXDYLD::InitializeFromAllImageInfos () 1060 { 1061 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); 1062 1063 Mutex::Locker locker(m_mutex); 1064 if (m_process->GetStopID() == m_dyld_image_infos_stop_id 1065 || m_dyld_image_infos.size() != 0) 1066 return false; 1067 1068 if (ReadAllImageInfosStructure ()) 1069 { 1070 // Nothing to load or unload? 1071 if (m_dyld_all_image_infos.dylib_info_count == 0) 1072 return true; 1073 1074 if (m_dyld_all_image_infos.dylib_info_addr == 0) 1075 { 1076 // DYLD is updating the images now. So we should say we have no images, and then we'll 1077 // figure it out when we hit the added breakpoint. 1078 return false; 1079 } 1080 else 1081 { 1082 if (!AddModulesUsingImageInfosAddress (m_dyld_all_image_infos.dylib_info_addr, 1083 m_dyld_all_image_infos.dylib_info_count)) 1084 { 1085 DEBUG_PRINTF("%s", "unable to read all data for all_dylib_infos."); 1086 m_dyld_image_infos.clear(); 1087 } 1088 } 1089 1090 // Now we have one more bit of business. If there is a library left in the images for our target that 1091 // doesn't have a load address, then it must be something that we were expecting to load (for instance we 1092 // read a load command for it) but it didn't in fact load - probably because DYLD_*_PATH pointed 1093 // to an equivalent version. We don't want it to stay in the target's module list or it will confuse 1094 // us, so unload it here. 1095 Target &target = m_process->GetTarget(); 1096 const ModuleList &target_modules = target.GetImages(); 1097 ModuleList not_loaded_modules; 1098 Mutex::Locker modules_locker(target_modules.GetMutex()); 1099 1100 size_t num_modules = target_modules.GetSize(); 1101 for (size_t i = 0; i < num_modules; i++) 1102 { 1103 ModuleSP module_sp = target_modules.GetModuleAtIndexUnlocked (i); 1104 if (!module_sp->IsLoadedInTarget (&target)) 1105 { 1106 if (log) 1107 { 1108 StreamString s; 1109 module_sp->GetDescription (&s); 1110 log->Printf ("Unloading pre-run module: %s.", s.GetData ()); 1111 } 1112 not_loaded_modules.Append (module_sp); 1113 } 1114 } 1115 1116 if (not_loaded_modules.GetSize() != 0) 1117 { 1118 target.GetImages().Remove(not_loaded_modules); 1119 } 1120 1121 return true; 1122 } 1123 else 1124 return false; 1125 } 1126 1127 //---------------------------------------------------------------------- 1128 // Read a mach_header at ADDR into HEADER, and also fill in the load 1129 // command data into LOAD_COMMAND_DATA if it is non-NULL. 1130 // 1131 // Returns true if we succeed, false if we fail for any reason. 1132 //---------------------------------------------------------------------- 1133 bool 1134 DynamicLoaderMacOSXDYLD::ReadMachHeader (lldb::addr_t addr, llvm::MachO::mach_header *header, DataExtractor *load_command_data) 1135 { 1136 DataBufferHeap header_bytes(sizeof(llvm::MachO::mach_header), 0); 1137 Error error; 1138 size_t bytes_read = m_process->ReadMemory (addr, 1139 header_bytes.GetBytes(), 1140 header_bytes.GetByteSize(), 1141 error); 1142 if (bytes_read == sizeof(llvm::MachO::mach_header)) 1143 { 1144 lldb::offset_t offset = 0; 1145 ::memset (header, 0, sizeof(llvm::MachO::mach_header)); 1146 1147 // Get the magic byte unswapped so we can figure out what we are dealing with 1148 DataExtractor data(header_bytes.GetBytes(), header_bytes.GetByteSize(), lldb::endian::InlHostByteOrder(), 4); 1149 header->magic = data.GetU32(&offset); 1150 lldb::addr_t load_cmd_addr = addr; 1151 data.SetByteOrder(DynamicLoaderMacOSXDYLD::GetByteOrderFromMagic(header->magic)); 1152 switch (header->magic) 1153 { 1154 case llvm::MachO::MH_MAGIC: 1155 case llvm::MachO::MH_CIGAM: 1156 data.SetAddressByteSize(4); 1157 load_cmd_addr += sizeof(llvm::MachO::mach_header); 1158 break; 1159 1160 case llvm::MachO::MH_MAGIC_64: 1161 case llvm::MachO::MH_CIGAM_64: 1162 data.SetAddressByteSize(8); 1163 load_cmd_addr += sizeof(llvm::MachO::mach_header_64); 1164 break; 1165 1166 default: 1167 return false; 1168 } 1169 1170 // Read the rest of dyld's mach header 1171 if (data.GetU32(&offset, &header->cputype, (sizeof(llvm::MachO::mach_header)/sizeof(uint32_t)) - 1)) 1172 { 1173 if (load_command_data == NULL) 1174 return true; // We were able to read the mach_header and weren't asked to read the load command bytes 1175 1176 DataBufferSP load_cmd_data_sp(new DataBufferHeap(header->sizeofcmds, 0)); 1177 1178 size_t load_cmd_bytes_read = m_process->ReadMemory (load_cmd_addr, 1179 load_cmd_data_sp->GetBytes(), 1180 load_cmd_data_sp->GetByteSize(), 1181 error); 1182 1183 if (load_cmd_bytes_read == header->sizeofcmds) 1184 { 1185 // Set the load command data and also set the correct endian 1186 // swap settings and the correct address size 1187 load_command_data->SetData(load_cmd_data_sp, 0, header->sizeofcmds); 1188 load_command_data->SetByteOrder(data.GetByteOrder()); 1189 load_command_data->SetAddressByteSize(data.GetAddressByteSize()); 1190 return true; // We successfully read the mach_header and the load command data 1191 } 1192 1193 return false; // We weren't able to read the load command data 1194 } 1195 } 1196 return false; // We failed the read the mach_header 1197 } 1198 1199 1200 //---------------------------------------------------------------------- 1201 // Parse the load commands for an image 1202 //---------------------------------------------------------------------- 1203 uint32_t 1204 DynamicLoaderMacOSXDYLD::ParseLoadCommands (const DataExtractor& data, DYLDImageInfo& dylib_info, FileSpec *lc_id_dylinker) 1205 { 1206 lldb::offset_t offset = 0; 1207 uint32_t cmd_idx; 1208 Segment segment; 1209 dylib_info.Clear (true); 1210 1211 for (cmd_idx = 0; cmd_idx < dylib_info.header.ncmds; cmd_idx++) 1212 { 1213 // Clear out any load command specific data from DYLIB_INFO since 1214 // we are about to read it. 1215 1216 if (data.ValidOffsetForDataOfSize (offset, sizeof(llvm::MachO::load_command))) 1217 { 1218 llvm::MachO::load_command load_cmd; 1219 lldb::offset_t load_cmd_offset = offset; 1220 load_cmd.cmd = data.GetU32 (&offset); 1221 load_cmd.cmdsize = data.GetU32 (&offset); 1222 switch (load_cmd.cmd) 1223 { 1224 case llvm::MachO::LC_SEGMENT: 1225 { 1226 segment.name.SetTrimmedCStringWithLength ((const char *)data.GetData(&offset, 16), 16); 1227 // We are putting 4 uint32_t values 4 uint64_t values so 1228 // we have to use multiple 32 bit gets below. 1229 segment.vmaddr = data.GetU32 (&offset); 1230 segment.vmsize = data.GetU32 (&offset); 1231 segment.fileoff = data.GetU32 (&offset); 1232 segment.filesize = data.GetU32 (&offset); 1233 // Extract maxprot, initprot, nsects and flags all at once 1234 data.GetU32(&offset, &segment.maxprot, 4); 1235 dylib_info.segments.push_back (segment); 1236 } 1237 break; 1238 1239 case llvm::MachO::LC_SEGMENT_64: 1240 { 1241 segment.name.SetTrimmedCStringWithLength ((const char *)data.GetData(&offset, 16), 16); 1242 // Extract vmaddr, vmsize, fileoff, and filesize all at once 1243 data.GetU64(&offset, &segment.vmaddr, 4); 1244 // Extract maxprot, initprot, nsects and flags all at once 1245 data.GetU32(&offset, &segment.maxprot, 4); 1246 dylib_info.segments.push_back (segment); 1247 } 1248 break; 1249 1250 case llvm::MachO::LC_ID_DYLINKER: 1251 if (lc_id_dylinker) 1252 { 1253 const lldb::offset_t name_offset = load_cmd_offset + data.GetU32 (&offset); 1254 const char *path = data.PeekCStr (name_offset); 1255 lc_id_dylinker->SetFile (path, true); 1256 } 1257 break; 1258 1259 case llvm::MachO::LC_UUID: 1260 dylib_info.uuid.SetBytes(data.GetData (&offset, 16)); 1261 break; 1262 1263 default: 1264 break; 1265 } 1266 // Set offset to be the beginning of the next load command. 1267 offset = load_cmd_offset + load_cmd.cmdsize; 1268 } 1269 } 1270 1271 // All sections listed in the dyld image info structure will all 1272 // either be fixed up already, or they will all be off by a single 1273 // slide amount that is determined by finding the first segment 1274 // that is at file offset zero which also has bytes (a file size 1275 // that is greater than zero) in the object file. 1276 1277 // Determine the slide amount (if any) 1278 const size_t num_sections = dylib_info.segments.size(); 1279 for (size_t i = 0; i < num_sections; ++i) 1280 { 1281 // Iterate through the object file sections to find the 1282 // first section that starts of file offset zero and that 1283 // has bytes in the file... 1284 if (dylib_info.segments[i].fileoff == 0 && dylib_info.segments[i].filesize > 0) 1285 { 1286 dylib_info.slide = dylib_info.address - dylib_info.segments[i].vmaddr; 1287 // We have found the slide amount, so we can exit 1288 // this for loop. 1289 break; 1290 } 1291 } 1292 return cmd_idx; 1293 } 1294 1295 //---------------------------------------------------------------------- 1296 // Read the mach_header and load commands for each image that the 1297 // _dyld_all_image_infos structure points to and cache the results. 1298 //---------------------------------------------------------------------- 1299 1300 void 1301 DynamicLoaderMacOSXDYLD::UpdateImageInfosHeaderAndLoadCommands(DYLDImageInfo::collection &image_infos, 1302 uint32_t infos_count, 1303 bool update_executable) 1304 { 1305 uint32_t exe_idx = UINT32_MAX; 1306 // Read any UUID values that we can get 1307 for (uint32_t i = 0; i < infos_count; i++) 1308 { 1309 if (!image_infos[i].UUIDValid()) 1310 { 1311 DataExtractor data; // Load command data 1312 if (!ReadMachHeader (image_infos[i].address, &image_infos[i].header, &data)) 1313 continue; 1314 1315 ParseLoadCommands (data, image_infos[i], NULL); 1316 1317 if (image_infos[i].header.filetype == llvm::MachO::MH_EXECUTE) 1318 exe_idx = i; 1319 1320 } 1321 } 1322 1323 Target &target = m_process->GetTarget(); 1324 1325 if (exe_idx < image_infos.size()) 1326 { 1327 const bool can_create = true; 1328 ModuleSP exe_module_sp (FindTargetModuleForDYLDImageInfo (image_infos[exe_idx], can_create, NULL)); 1329 1330 if (exe_module_sp) 1331 { 1332 UpdateImageLoadAddress (exe_module_sp.get(), image_infos[exe_idx]); 1333 1334 if (exe_module_sp.get() != target.GetExecutableModulePointer()) 1335 { 1336 // Don't load dependent images since we are in dyld where we will know 1337 // and find out about all images that are loaded. Also when setting the 1338 // executable module, it will clear the targets module list, and if we 1339 // have an in memory dyld module, it will get removed from the list 1340 // so we will need to add it back after setting the executable module, 1341 // so we first try and see if we already have a weak pointer to the 1342 // dyld module, make it into a shared pointer, then add the executable, 1343 // then re-add it back to make sure it is always in the list. 1344 ModuleSP dyld_module_sp(m_dyld_module_wp.lock()); 1345 1346 const bool get_dependent_images = false; 1347 m_process->GetTarget().SetExecutableModule (exe_module_sp, 1348 get_dependent_images); 1349 1350 if (dyld_module_sp) 1351 { 1352 if(target.GetImages().AppendIfNeeded (dyld_module_sp)) 1353 { 1354 // Also add it to the section list. 1355 UpdateImageLoadAddress(dyld_module_sp.get(), m_dyld); 1356 } 1357 } 1358 } 1359 } 1360 } 1361 } 1362 1363 //---------------------------------------------------------------------- 1364 // On Mac OS X libobjc (the Objective-C runtime) has several critical dispatch 1365 // functions written in hand-written assembly, and also have hand-written unwind 1366 // information in the eh_frame section. Normally we prefer analyzing the 1367 // assembly instructions of a currently executing frame to unwind from that frame -- 1368 // but on hand-written functions this profiling can fail. We should use the 1369 // eh_frame instructions for these functions all the time. 1370 // 1371 // As an aside, it would be better if the eh_frame entries had a flag (or were 1372 // extensible so they could have an Apple-specific flag) which indicates that 1373 // the instructions are asynchronous -- accurate at every instruction, instead 1374 // of our normal default assumption that they are not. 1375 //---------------------------------------------------------------------- 1376 1377 bool 1378 DynamicLoaderMacOSXDYLD::AlwaysRelyOnEHUnwindInfo (SymbolContext &sym_ctx) 1379 { 1380 ModuleSP module_sp; 1381 if (sym_ctx.symbol) 1382 { 1383 module_sp = sym_ctx.symbol->GetAddress().GetModule(); 1384 } 1385 if (module_sp.get() == NULL && sym_ctx.function) 1386 { 1387 module_sp = sym_ctx.function->GetAddressRange().GetBaseAddress().GetModule(); 1388 } 1389 if (module_sp.get() == NULL) 1390 return false; 1391 1392 ObjCLanguageRuntime *objc_runtime = m_process->GetObjCLanguageRuntime(); 1393 if (objc_runtime != NULL && objc_runtime->IsModuleObjCLibrary (module_sp)) 1394 { 1395 return true; 1396 } 1397 1398 return false; 1399 } 1400 1401 1402 1403 //---------------------------------------------------------------------- 1404 // Dump a Segment to the file handle provided. 1405 //---------------------------------------------------------------------- 1406 void 1407 DynamicLoaderMacOSXDYLD::Segment::PutToLog (Log *log, lldb::addr_t slide) const 1408 { 1409 if (log) 1410 { 1411 if (slide == 0) 1412 log->Printf ("\t\t%16s [0x%16.16" PRIx64 " - 0x%16.16" PRIx64 ")", 1413 name.AsCString(""), 1414 vmaddr + slide, 1415 vmaddr + slide + vmsize); 1416 else 1417 log->Printf ("\t\t%16s [0x%16.16" PRIx64 " - 0x%16.16" PRIx64 ") slide = 0x%" PRIx64, 1418 name.AsCString(""), 1419 vmaddr + slide, 1420 vmaddr + slide + vmsize, 1421 slide); 1422 } 1423 } 1424 1425 const DynamicLoaderMacOSXDYLD::Segment * 1426 DynamicLoaderMacOSXDYLD::DYLDImageInfo::FindSegment (const ConstString &name) const 1427 { 1428 const size_t num_segments = segments.size(); 1429 for (size_t i=0; i<num_segments; ++i) 1430 { 1431 if (segments[i].name == name) 1432 return &segments[i]; 1433 } 1434 return NULL; 1435 } 1436 1437 1438 //---------------------------------------------------------------------- 1439 // Dump an image info structure to the file handle provided. 1440 //---------------------------------------------------------------------- 1441 void 1442 DynamicLoaderMacOSXDYLD::DYLDImageInfo::PutToLog (Log *log) const 1443 { 1444 if (log == NULL) 1445 return; 1446 uint8_t *u = (uint8_t *)uuid.GetBytes(); 1447 1448 if (address == LLDB_INVALID_ADDRESS) 1449 { 1450 if (u) 1451 { 1452 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)", 1453 mod_date, 1454 u[ 0], u[ 1], u[ 2], u[ 3], 1455 u[ 4], u[ 5], u[ 6], u[ 7], 1456 u[ 8], u[ 9], u[10], u[11], 1457 u[12], u[13], u[14], u[15], 1458 file_spec.GetPath().c_str()); 1459 } 1460 else 1461 log->Printf("\t modtime=0x%8.8" PRIx64 " path='%s' (UNLOADED)", 1462 mod_date, 1463 file_spec.GetPath().c_str()); 1464 } 1465 else 1466 { 1467 if (u) 1468 { 1469 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'", 1470 address, 1471 mod_date, 1472 u[ 0], u[ 1], u[ 2], u[ 3], 1473 u[ 4], u[ 5], u[ 6], u[ 7], 1474 u[ 8], u[ 9], u[10], u[11], 1475 u[12], u[13], u[14], u[15], 1476 file_spec.GetPath().c_str()); 1477 } 1478 else 1479 { 1480 log->Printf("\taddress=0x%16.16" PRIx64 " modtime=0x%8.8" PRIx64 " path='%s'", 1481 address, 1482 mod_date, 1483 file_spec.GetPath().c_str()); 1484 1485 } 1486 for (uint32_t i=0; i<segments.size(); ++i) 1487 segments[i].PutToLog(log, slide); 1488 } 1489 } 1490 1491 //---------------------------------------------------------------------- 1492 // Dump the _dyld_all_image_infos members and all current image infos 1493 // that we have parsed to the file handle provided. 1494 //---------------------------------------------------------------------- 1495 void 1496 DynamicLoaderMacOSXDYLD::PutToLog(Log *log) const 1497 { 1498 if (log == NULL) 1499 return; 1500 1501 Mutex::Locker locker(m_mutex); 1502 log->Printf("dyld_all_image_infos = { version=%d, count=%d, addr=0x%8.8" PRIx64 ", notify=0x%8.8" PRIx64 " }", 1503 m_dyld_all_image_infos.version, 1504 m_dyld_all_image_infos.dylib_info_count, 1505 (uint64_t)m_dyld_all_image_infos.dylib_info_addr, 1506 (uint64_t)m_dyld_all_image_infos.notification); 1507 size_t i; 1508 const size_t count = m_dyld_image_infos.size(); 1509 if (count > 0) 1510 { 1511 log->PutCString("Loaded:"); 1512 for (i = 0; i<count; i++) 1513 m_dyld_image_infos[i].PutToLog(log); 1514 } 1515 } 1516 1517 void 1518 DynamicLoaderMacOSXDYLD::PrivateInitialize(Process *process) 1519 { 1520 DEBUG_PRINTF("DynamicLoaderMacOSXDYLD::%s() process state = %s\n", __FUNCTION__, StateAsCString(m_process->GetState())); 1521 Clear(true); 1522 m_process = process; 1523 m_process->GetTarget().ClearAllLoadedSections(); 1524 } 1525 1526 bool 1527 DynamicLoaderMacOSXDYLD::SetNotificationBreakpoint () 1528 { 1529 DEBUG_PRINTF("DynamicLoaderMacOSXDYLD::%s() process state = %s\n", __FUNCTION__, StateAsCString(m_process->GetState())); 1530 if (m_break_id == LLDB_INVALID_BREAK_ID) 1531 { 1532 if (m_dyld_all_image_infos.notification != LLDB_INVALID_ADDRESS) 1533 { 1534 Address so_addr; 1535 // Set the notification breakpoint and install a breakpoint 1536 // callback function that will get called each time the 1537 // breakpoint gets hit. We will use this to track when shared 1538 // libraries get loaded/unloaded. 1539 bool resolved = m_process->GetTarget().ResolveLoadAddress(m_dyld_all_image_infos.notification, so_addr); 1540 if (!resolved) 1541 { 1542 ModuleSP dyld_module_sp = m_dyld_module_wp.lock(); 1543 if (dyld_module_sp) 1544 { 1545 UpdateImageLoadAddress (dyld_module_sp.get(), m_dyld); 1546 resolved = m_process->GetTarget().ResolveLoadAddress(m_dyld_all_image_infos.notification, so_addr); 1547 } 1548 } 1549 1550 if (resolved) 1551 { 1552 Breakpoint *dyld_break = m_process->GetTarget().CreateBreakpoint (so_addr, true, false).get(); 1553 dyld_break->SetCallback (DynamicLoaderMacOSXDYLD::NotifyBreakpointHit, this, true); 1554 dyld_break->SetBreakpointKind ("shared-library-event"); 1555 m_break_id = dyld_break->GetID(); 1556 } 1557 } 1558 } 1559 return m_break_id != LLDB_INVALID_BREAK_ID; 1560 } 1561 1562 //---------------------------------------------------------------------- 1563 // Member function that gets called when the process state changes. 1564 //---------------------------------------------------------------------- 1565 void 1566 DynamicLoaderMacOSXDYLD::PrivateProcessStateChanged (Process *process, StateType state) 1567 { 1568 DEBUG_PRINTF("DynamicLoaderMacOSXDYLD::%s(%s)\n", __FUNCTION__, StateAsCString(state)); 1569 switch (state) 1570 { 1571 case eStateConnected: 1572 case eStateAttaching: 1573 case eStateLaunching: 1574 case eStateInvalid: 1575 case eStateUnloaded: 1576 case eStateExited: 1577 case eStateDetached: 1578 Clear(false); 1579 break; 1580 1581 case eStateStopped: 1582 // Keep trying find dyld and set our notification breakpoint each time 1583 // we stop until we succeed 1584 if (!DidSetNotificationBreakpoint () && m_process->IsAlive()) 1585 { 1586 if (NeedToLocateDYLD ()) 1587 LocateDYLD (); 1588 1589 SetNotificationBreakpoint (); 1590 } 1591 break; 1592 1593 case eStateRunning: 1594 case eStateStepping: 1595 case eStateCrashed: 1596 case eStateSuspended: 1597 break; 1598 } 1599 } 1600 1601 ThreadPlanSP 1602 DynamicLoaderMacOSXDYLD::GetStepThroughTrampolinePlan (Thread &thread, bool stop_others) 1603 { 1604 ThreadPlanSP thread_plan_sp; 1605 StackFrame *current_frame = thread.GetStackFrameAtIndex(0).get(); 1606 const SymbolContext ¤t_context = current_frame->GetSymbolContext(eSymbolContextSymbol); 1607 Symbol *current_symbol = current_context.symbol; 1608 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 1609 TargetSP target_sp (thread.CalculateTarget()); 1610 1611 if (current_symbol != NULL) 1612 { 1613 std::vector<Address> addresses; 1614 1615 if (current_symbol->IsTrampoline()) 1616 { 1617 const ConstString &trampoline_name = current_symbol->GetMangled().GetName(Mangled::ePreferMangled); 1618 1619 if (trampoline_name) 1620 { 1621 const ModuleList &images = target_sp->GetImages(); 1622 1623 SymbolContextList code_symbols; 1624 images.FindSymbolsWithNameAndType(trampoline_name, eSymbolTypeCode, code_symbols); 1625 size_t num_code_symbols = code_symbols.GetSize(); 1626 1627 if (num_code_symbols > 0) 1628 { 1629 for (uint32_t i = 0; i < num_code_symbols; i++) 1630 { 1631 SymbolContext context; 1632 AddressRange addr_range; 1633 if (code_symbols.GetContextAtIndex(i, context)) 1634 { 1635 context.GetAddressRange (eSymbolContextEverything, 0, false, addr_range); 1636 addresses.push_back(addr_range.GetBaseAddress()); 1637 if (log) 1638 { 1639 addr_t load_addr = addr_range.GetBaseAddress().GetLoadAddress(target_sp.get()); 1640 1641 log->Printf ("Found a trampoline target symbol at 0x%" PRIx64 ".", load_addr); 1642 } 1643 } 1644 } 1645 } 1646 1647 SymbolContextList reexported_symbols; 1648 images.FindSymbolsWithNameAndType(trampoline_name, eSymbolTypeReExported, reexported_symbols); 1649 size_t num_reexported_symbols = reexported_symbols.GetSize(); 1650 if (num_reexported_symbols > 0) 1651 { 1652 for (uint32_t i = 0; i < num_reexported_symbols; i++) 1653 { 1654 SymbolContext context; 1655 if (reexported_symbols.GetContextAtIndex(i, context)) 1656 { 1657 if (context.symbol) 1658 { 1659 Symbol *actual_symbol = context.symbol->ResolveReExportedSymbol(*target_sp.get()); 1660 if (actual_symbol) 1661 { 1662 if (actual_symbol->GetAddress().IsValid()) 1663 { 1664 addresses.push_back(actual_symbol->GetAddress()); 1665 if (log) 1666 { 1667 lldb::addr_t load_addr = actual_symbol->GetAddress().GetLoadAddress(target_sp.get()); 1668 log->Printf ("Found a re-exported symbol: %s at 0x%" PRIx64 ".", 1669 actual_symbol->GetName().GetCString(), load_addr); 1670 } 1671 } 1672 } 1673 } 1674 } 1675 } 1676 } 1677 1678 SymbolContextList indirect_symbols; 1679 images.FindSymbolsWithNameAndType(trampoline_name, eSymbolTypeResolver, indirect_symbols); 1680 size_t num_indirect_symbols = indirect_symbols.GetSize(); 1681 if (num_indirect_symbols > 0) 1682 { 1683 for (uint32_t i = 0; i < num_indirect_symbols; i++) 1684 { 1685 SymbolContext context; 1686 AddressRange addr_range; 1687 if (indirect_symbols.GetContextAtIndex(i, context)) 1688 { 1689 context.GetAddressRange (eSymbolContextEverything, 0, false, addr_range); 1690 addresses.push_back(addr_range.GetBaseAddress()); 1691 if (log) 1692 { 1693 addr_t load_addr = addr_range.GetBaseAddress().GetLoadAddress(target_sp.get()); 1694 1695 log->Printf ("Found an indirect target symbol at 0x%" PRIx64 ".", load_addr); 1696 } 1697 } 1698 } 1699 } 1700 } 1701 } 1702 else if (current_symbol->GetType() == eSymbolTypeReExported) 1703 { 1704 // I am not sure we could ever end up stopped AT a re-exported symbol. But just in case: 1705 1706 const Symbol *actual_symbol = current_symbol->ResolveReExportedSymbol(*(target_sp.get())); 1707 if (actual_symbol) 1708 { 1709 Address target_addr(actual_symbol->GetAddress()); 1710 if (target_addr.IsValid()) 1711 { 1712 if (log) 1713 log->Printf ("Found a re-exported symbol: %s pointing to: %s at 0x%" PRIx64 ".", 1714 current_symbol->GetName().GetCString(), 1715 actual_symbol->GetName().GetCString(), 1716 target_addr.GetLoadAddress(target_sp.get())); 1717 addresses.push_back (target_addr.GetLoadAddress(target_sp.get())); 1718 1719 } 1720 } 1721 } 1722 1723 if (addresses.size() > 0) 1724 { 1725 // First check whether any of the addresses point to Indirect symbols, and if they do, resolve them: 1726 std::vector<lldb::addr_t> load_addrs; 1727 for (Address address : addresses) 1728 { 1729 Symbol *symbol = address.CalculateSymbolContextSymbol(); 1730 if (symbol && symbol->IsIndirect()) 1731 { 1732 Error error; 1733 addr_t resolved_addr = thread.GetProcess()->ResolveIndirectFunction(&symbol->GetAddress(), error); 1734 if (error.Success()) 1735 { 1736 load_addrs.push_back(resolved_addr); 1737 if (log) 1738 log->Printf("ResolveIndirectFunction found resolved target for %s at 0x%" PRIx64 ".", 1739 symbol->GetName().GetCString(), resolved_addr); 1740 } 1741 } 1742 else 1743 { 1744 load_addrs.push_back(address.GetLoadAddress(target_sp.get())); 1745 } 1746 1747 } 1748 thread_plan_sp.reset (new ThreadPlanRunToAddress (thread, load_addrs, stop_others)); 1749 } 1750 } 1751 else 1752 { 1753 if (log) 1754 log->Printf ("Could not find symbol for step through."); 1755 } 1756 1757 return thread_plan_sp; 1758 } 1759 1760 size_t 1761 DynamicLoaderMacOSXDYLD::FindEquivalentSymbols (lldb_private::Symbol *original_symbol, 1762 lldb_private::ModuleList &images, 1763 lldb_private::SymbolContextList &equivalent_symbols) 1764 { 1765 const ConstString &trampoline_name = original_symbol->GetMangled().GetName(Mangled::ePreferMangled); 1766 if (!trampoline_name) 1767 return 0; 1768 1769 size_t initial_size = equivalent_symbols.GetSize(); 1770 1771 static const char *resolver_name_regex = "(_gc|_non_gc|\\$[A-Za-z0-9\\$]+)$"; 1772 std::string equivalent_regex_buf("^"); 1773 equivalent_regex_buf.append (trampoline_name.GetCString()); 1774 equivalent_regex_buf.append (resolver_name_regex); 1775 1776 RegularExpression equivalent_name_regex (equivalent_regex_buf.c_str()); 1777 const bool append = true; 1778 images.FindSymbolsMatchingRegExAndType (equivalent_name_regex, eSymbolTypeCode, equivalent_symbols, append); 1779 1780 return equivalent_symbols.GetSize() - initial_size; 1781 } 1782 1783 Error 1784 DynamicLoaderMacOSXDYLD::CanLoadImage () 1785 { 1786 Error error; 1787 // In order for us to tell if we can load a shared library we verify that 1788 // the dylib_info_addr isn't zero (which means no shared libraries have 1789 // been set yet, or dyld is currently mucking with the shared library list). 1790 if (ReadAllImageInfosStructure ()) 1791 { 1792 // TODO: also check the _dyld_global_lock_held variable in libSystem.B.dylib? 1793 // TODO: check the malloc lock? 1794 // TODO: check the objective C lock? 1795 if (m_dyld_all_image_infos.dylib_info_addr != 0) 1796 return error; // Success 1797 } 1798 1799 error.SetErrorString("unsafe to load or unload shared libraries"); 1800 return error; 1801 } 1802 1803 void 1804 DynamicLoaderMacOSXDYLD::Initialize() 1805 { 1806 PluginManager::RegisterPlugin (GetPluginNameStatic(), 1807 GetPluginDescriptionStatic(), 1808 CreateInstance); 1809 } 1810 1811 void 1812 DynamicLoaderMacOSXDYLD::Terminate() 1813 { 1814 PluginManager::UnregisterPlugin (CreateInstance); 1815 } 1816 1817 1818 lldb_private::ConstString 1819 DynamicLoaderMacOSXDYLD::GetPluginNameStatic() 1820 { 1821 static ConstString g_name("macosx-dyld"); 1822 return g_name; 1823 } 1824 1825 const char * 1826 DynamicLoaderMacOSXDYLD::GetPluginDescriptionStatic() 1827 { 1828 return "Dynamic loader plug-in that watches for shared library loads/unloads in MacOSX user processes."; 1829 } 1830 1831 1832 //------------------------------------------------------------------ 1833 // PluginInterface protocol 1834 //------------------------------------------------------------------ 1835 lldb_private::ConstString 1836 DynamicLoaderMacOSXDYLD::GetPluginName() 1837 { 1838 return GetPluginNameStatic(); 1839 } 1840 1841 uint32_t 1842 DynamicLoaderMacOSXDYLD::GetPluginVersion() 1843 { 1844 return 1; 1845 } 1846 1847 uint32_t 1848 DynamicLoaderMacOSXDYLD::AddrByteSize() 1849 { 1850 switch (m_dyld.header.magic) 1851 { 1852 case llvm::MachO::MH_MAGIC: 1853 case llvm::MachO::MH_CIGAM: 1854 return 4; 1855 1856 case llvm::MachO::MH_MAGIC_64: 1857 case llvm::MachO::MH_CIGAM_64: 1858 return 8; 1859 1860 default: 1861 break; 1862 } 1863 return 0; 1864 } 1865 1866 lldb::ByteOrder 1867 DynamicLoaderMacOSXDYLD::GetByteOrderFromMagic (uint32_t magic) 1868 { 1869 switch (magic) 1870 { 1871 case llvm::MachO::MH_MAGIC: 1872 case llvm::MachO::MH_MAGIC_64: 1873 return lldb::endian::InlHostByteOrder(); 1874 1875 case llvm::MachO::MH_CIGAM: 1876 case llvm::MachO::MH_CIGAM_64: 1877 if (lldb::endian::InlHostByteOrder() == lldb::eByteOrderBig) 1878 return lldb::eByteOrderLittle; 1879 else 1880 return lldb::eByteOrderBig; 1881 1882 default: 1883 break; 1884 } 1885 return lldb::eByteOrderInvalid; 1886 } 1887 1888 lldb::ByteOrder 1889 DynamicLoaderMacOSXDYLD::DYLDImageInfo::GetByteOrder() 1890 { 1891 return DynamicLoaderMacOSXDYLD::GetByteOrderFromMagic(header.magic); 1892 } 1893 1894