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 "llvm/Support/MachO.h" 12 13 #include "lldb/Breakpoint/StoppointCallbackContext.h" 14 #include "lldb/Core/DataBuffer.h" 15 #include "lldb/Core/DataBufferHeap.h" 16 #include "lldb/Core/Log.h" 17 #include "lldb/Core/Module.h" 18 #include "lldb/Core/ModuleSpec.h" 19 #include "lldb/Core/PluginManager.h" 20 #include "lldb/Core/Section.h" 21 #include "lldb/Core/State.h" 22 #include "lldb/Symbol/Function.h" 23 #include "lldb/Symbol/ObjectFile.h" 24 #include "lldb/Target/ObjCLanguageRuntime.h" 25 #include "lldb/Target/RegisterContext.h" 26 #include "lldb/Target/Target.h" 27 #include "lldb/Target/Thread.h" 28 #include "lldb/Target/ThreadPlanRunToAddress.h" 29 #include "lldb/Target/StackFrame.h" 30 31 #include "DynamicLoaderMacOSXDYLD.h" 32 33 //#define ENABLE_DEBUG_PRINTF // COMMENT THIS LINE OUT PRIOR TO CHECKIN 34 #ifdef ENABLE_DEBUG_PRINTF 35 #include <stdio.h> 36 #define DEBUG_PRINTF(fmt, ...) printf(fmt, ## __VA_ARGS__) 37 #else 38 #define DEBUG_PRINTF(fmt, ...) 39 #endif 40 41 #ifndef __APPLE__ 42 #include "Utility/UuidCompatibility.h" 43 #endif 44 45 using namespace lldb; 46 using namespace lldb_private; 47 48 /// FIXME - The ObjC Runtime trampoline handler doesn't really belong here. 49 /// I am putting it here so I can invoke it in the Trampoline code here, but 50 /// it should be moved to the ObjC Runtime support when it is set up. 51 52 53 DynamicLoaderMacOSXDYLD::DYLDImageInfo * 54 DynamicLoaderMacOSXDYLD::GetImageInfo (Module *module) 55 { 56 const UUID &module_uuid = module->GetUUID(); 57 DYLDImageInfo::collection::iterator pos, end = m_dyld_image_infos.end(); 58 59 // First try just by UUID as it is the safest. 60 if (module_uuid.IsValid()) 61 { 62 for (pos = m_dyld_image_infos.begin(); pos != end; ++pos) 63 { 64 if (pos->uuid == module_uuid) 65 return &(*pos); 66 } 67 68 if (m_dyld.uuid == module_uuid) 69 return &m_dyld; 70 } 71 72 // Next try by platform path only for things that don't have a valid UUID 73 // since if a file has a valid UUID in real life it should also in the 74 // dyld info. This is the next safest because the paths in the dyld info 75 // are platform paths, not local paths. For local debugging platform == local 76 // paths. 77 const FileSpec &platform_file_spec = module->GetPlatformFileSpec(); 78 for (pos = m_dyld_image_infos.begin(); pos != end; ++pos) 79 { 80 if (pos->file_spec == platform_file_spec && pos->uuid.IsValid() == false) 81 return &(*pos); 82 } 83 84 if (m_dyld.file_spec == platform_file_spec && m_dyld.uuid.IsValid() == false) 85 return &m_dyld; 86 87 return NULL; 88 } 89 90 //---------------------------------------------------------------------- 91 // Create an instance of this class. This function is filled into 92 // the plugin info class that gets handed out by the plugin factory and 93 // allows the lldb to instantiate an instance of this class. 94 //---------------------------------------------------------------------- 95 DynamicLoader * 96 DynamicLoaderMacOSXDYLD::CreateInstance (Process* process, bool force) 97 { 98 bool create = force; 99 if (!create) 100 { 101 create = true; 102 Module* exe_module = process->GetTarget().GetExecutableModulePointer(); 103 if (exe_module) 104 { 105 ObjectFile *object_file = exe_module->GetObjectFile(); 106 if (object_file) 107 { 108 create = (object_file->GetStrata() == ObjectFile::eStrataUser); 109 } 110 } 111 112 if (create) 113 { 114 const llvm::Triple &triple_ref = process->GetTarget().GetArchitecture().GetTriple(); 115 switch (triple_ref.getOS()) 116 { 117 case llvm::Triple::Darwin: 118 case llvm::Triple::MacOSX: 119 case llvm::Triple::IOS: 120 create = triple_ref.getVendor() == llvm::Triple::Apple; 121 break; 122 default: 123 create = false; 124 break; 125 } 126 } 127 } 128 129 if (create) 130 return new DynamicLoaderMacOSXDYLD (process); 131 return NULL; 132 } 133 134 //---------------------------------------------------------------------- 135 // Constructor 136 //---------------------------------------------------------------------- 137 DynamicLoaderMacOSXDYLD::DynamicLoaderMacOSXDYLD (Process* process) : 138 DynamicLoader(process), 139 m_dyld(), 140 m_dyld_module_wp(), 141 m_dyld_all_image_infos_addr(LLDB_INVALID_ADDRESS), 142 m_dyld_all_image_infos(), 143 m_dyld_all_image_infos_stop_id (UINT32_MAX), 144 m_break_id(LLDB_INVALID_BREAK_ID), 145 m_dyld_image_infos(), 146 m_dyld_image_infos_stop_id (UINT32_MAX), 147 m_mutex(Mutex::eMutexTypeRecursive), 148 m_process_image_addr_is_all_images_infos (false) 149 { 150 } 151 152 //---------------------------------------------------------------------- 153 // Destructor 154 //---------------------------------------------------------------------- 155 DynamicLoaderMacOSXDYLD::~DynamicLoaderMacOSXDYLD() 156 { 157 Clear(true); 158 } 159 160 //------------------------------------------------------------------ 161 /// Called after attaching a process. 162 /// 163 /// Allow DynamicLoader plug-ins to execute some code after 164 /// attaching to a process. 165 //------------------------------------------------------------------ 166 void 167 DynamicLoaderMacOSXDYLD::DidAttach () 168 { 169 PrivateInitialize(m_process); 170 LocateDYLD (); 171 SetNotificationBreakpoint (); 172 } 173 174 //------------------------------------------------------------------ 175 /// Called after attaching a process. 176 /// 177 /// Allow DynamicLoader plug-ins to execute some code after 178 /// attaching to a process. 179 //------------------------------------------------------------------ 180 void 181 DynamicLoaderMacOSXDYLD::DidLaunch () 182 { 183 PrivateInitialize(m_process); 184 LocateDYLD (); 185 SetNotificationBreakpoint (); 186 } 187 188 bool 189 DynamicLoaderMacOSXDYLD::ProcessDidExec () 190 { 191 if (m_process) 192 { 193 // If we are stopped after an exec, we will have only one thread... 194 if (m_process->GetThreadList().GetSize() == 1) 195 { 196 // We know if a process has exec'ed if our "m_dyld_all_image_infos_addr" 197 // value differs from the Process' image info address. When a process 198 // execs itself it might cause a change if ASLR is enabled. 199 const addr_t shlib_addr = m_process->GetImageInfoAddress (); 200 if (m_process_image_addr_is_all_images_infos == true && shlib_addr != m_dyld_all_image_infos_addr) 201 { 202 // The image info address from the process is the 'dyld_all_image_infos' 203 // address and it has changed. 204 return true; 205 } 206 207 if (m_process_image_addr_is_all_images_infos == false && shlib_addr == m_dyld.address) 208 { 209 // The image info address from the process is the mach_header 210 // address for dyld and it has changed. 211 return true; 212 } 213 214 // ASLR might be disabled and dyld could have ended up in the same 215 // location. We should try and detect if we are stopped at '_dyld_start' 216 ThreadSP thread_sp (m_process->GetThreadList().GetThreadAtIndex(0)); 217 if (thread_sp) 218 { 219 lldb::StackFrameSP frame_sp (thread_sp->GetStackFrameAtIndex(0)); 220 if (frame_sp) 221 { 222 const Symbol *symbol = frame_sp->GetSymbolContext(eSymbolContextSymbol).symbol; 223 if (symbol) 224 { 225 if (symbol->GetName() == ConstString("_dyld_start")) 226 return true; 227 } 228 } 229 } 230 } 231 } 232 return false; 233 } 234 235 236 237 //---------------------------------------------------------------------- 238 // Clear out the state of this class. 239 //---------------------------------------------------------------------- 240 void 241 DynamicLoaderMacOSXDYLD::Clear (bool clear_process) 242 { 243 Mutex::Locker locker(m_mutex); 244 245 if (m_process->IsAlive() && LLDB_BREAK_ID_IS_VALID(m_break_id)) 246 m_process->GetTarget().RemoveBreakpointByID (m_break_id); 247 248 if (clear_process) 249 m_process = NULL; 250 m_dyld.Clear(false); 251 m_dyld_all_image_infos_addr = LLDB_INVALID_ADDRESS; 252 m_dyld_all_image_infos.Clear(); 253 m_break_id = LLDB_INVALID_BREAK_ID; 254 m_dyld_image_infos.clear(); 255 } 256 257 //---------------------------------------------------------------------- 258 // Check if we have found DYLD yet 259 //---------------------------------------------------------------------- 260 bool 261 DynamicLoaderMacOSXDYLD::DidSetNotificationBreakpoint() const 262 { 263 return LLDB_BREAK_ID_IS_VALID (m_break_id); 264 } 265 266 //---------------------------------------------------------------------- 267 // Try and figure out where dyld is by first asking the Process 268 // if it knows (which currently calls down in the the lldb::Process 269 // to get the DYLD info (available on SnowLeopard only). If that fails, 270 // then check in the default addresses. 271 //---------------------------------------------------------------------- 272 bool 273 DynamicLoaderMacOSXDYLD::LocateDYLD() 274 { 275 if (m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS) 276 { 277 // Check the image info addr as it might point to the 278 // mach header for dyld, or it might point to the 279 // dyld_all_image_infos struct 280 const addr_t shlib_addr = m_process->GetImageInfoAddress (); 281 if (shlib_addr != LLDB_INVALID_ADDRESS) 282 { 283 ByteOrder byte_order = m_process->GetTarget().GetArchitecture().GetByteOrder(); 284 uint8_t buf[4]; 285 DataExtractor data (buf, sizeof(buf), byte_order, 4); 286 Error error; 287 if (m_process->ReadMemory (shlib_addr, buf, 4, error) == 4) 288 { 289 lldb::offset_t offset = 0; 290 uint32_t magic = data.GetU32 (&offset); 291 switch (magic) 292 { 293 case llvm::MachO::MH_MAGIC: 294 case llvm::MachO::MH_MAGIC_64: 295 case llvm::MachO::MH_CIGAM: 296 case llvm::MachO::MH_CIGAM_64: 297 m_process_image_addr_is_all_images_infos = false; 298 return ReadDYLDInfoFromMemoryAndSetNotificationCallback(shlib_addr); 299 300 default: 301 break; 302 } 303 } 304 // Maybe it points to the all image infos? 305 m_dyld_all_image_infos_addr = shlib_addr; 306 m_process_image_addr_is_all_images_infos = true; 307 } 308 } 309 310 if (m_dyld_all_image_infos_addr != LLDB_INVALID_ADDRESS) 311 { 312 if (ReadAllImageInfosStructure ()) 313 { 314 if (m_dyld_all_image_infos.dyldImageLoadAddress != LLDB_INVALID_ADDRESS) 315 return ReadDYLDInfoFromMemoryAndSetNotificationCallback (m_dyld_all_image_infos.dyldImageLoadAddress); 316 else 317 return ReadDYLDInfoFromMemoryAndSetNotificationCallback (m_dyld_all_image_infos_addr & 0xfffffffffff00000ull); 318 } 319 } 320 321 // Check some default values 322 Module *executable = m_process->GetTarget().GetExecutableModulePointer(); 323 324 if (executable) 325 { 326 const ArchSpec &exe_arch = executable->GetArchitecture(); 327 if (exe_arch.GetAddressByteSize() == 8) 328 { 329 return ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x7fff5fc00000ull); 330 } 331 else if (exe_arch.GetMachine() == llvm::Triple::arm || exe_arch.GetMachine() == llvm::Triple::thumb) 332 { 333 return ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x2fe00000); 334 } 335 else 336 { 337 return ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x8fe00000); 338 } 339 } 340 return false; 341 } 342 343 ModuleSP 344 DynamicLoaderMacOSXDYLD::FindTargetModuleForDYLDImageInfo (DYLDImageInfo &image_info, bool can_create, bool *did_create_ptr) 345 { 346 if (did_create_ptr) 347 *did_create_ptr = false; 348 349 Target &target = m_process->GetTarget(); 350 const ModuleList &target_images = target.GetImages(); 351 ModuleSpec module_spec (image_info.file_spec, image_info.GetArchitecture ()); 352 module_spec.GetUUID() = image_info.uuid; 353 ModuleSP module_sp (target_images.FindFirstModule (module_spec)); 354 355 if (module_sp && !module_spec.GetUUID().IsValid() && !module_sp->GetUUID().IsValid()) 356 { 357 // No UUID, we must rely upon the cached module modification 358 // time and the modification time of the file on disk 359 if (module_sp->GetModificationTime() != module_sp->GetFileSpec().GetModificationTime()) 360 module_sp.reset(); 361 } 362 363 if (!module_sp) 364 { 365 if (can_create) 366 { 367 module_sp = target.GetSharedModule (module_spec); 368 if (!module_sp || module_sp->GetObjectFile() == NULL) 369 module_sp = m_process->ReadModuleFromMemory (image_info.file_spec, image_info.address); 370 371 if (did_create_ptr) 372 *did_create_ptr = (bool) module_sp; 373 } 374 } 375 return module_sp; 376 } 377 378 //---------------------------------------------------------------------- 379 // Assume that dyld is in memory at ADDR and try to parse it's load 380 // commands 381 //---------------------------------------------------------------------- 382 bool 383 DynamicLoaderMacOSXDYLD::ReadDYLDInfoFromMemoryAndSetNotificationCallback(lldb::addr_t addr) 384 { 385 DataExtractor data; // Load command data 386 if (ReadMachHeader (addr, &m_dyld.header, &data)) 387 { 388 if (m_dyld.header.filetype == llvm::MachO::MH_DYLINKER) 389 { 390 m_dyld.address = addr; 391 ModuleSP dyld_module_sp; 392 if (ParseLoadCommands (data, m_dyld, &m_dyld.file_spec)) 393 { 394 if (m_dyld.file_spec) 395 { 396 dyld_module_sp = FindTargetModuleForDYLDImageInfo (m_dyld, true, NULL); 397 398 if (dyld_module_sp) 399 UpdateImageLoadAddress (dyld_module_sp.get(), m_dyld); 400 } 401 } 402 403 Target &target = m_process->GetTarget(); 404 405 if (m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS && dyld_module_sp.get()) 406 { 407 static ConstString g_dyld_all_image_infos ("dyld_all_image_infos"); 408 const Symbol *symbol = dyld_module_sp->FindFirstSymbolWithNameAndType (g_dyld_all_image_infos, eSymbolTypeData); 409 if (symbol) 410 m_dyld_all_image_infos_addr = symbol->GetAddress().GetLoadAddress(&target); 411 } 412 413 // Update all image infos 414 InitializeFromAllImageInfos (); 415 416 // If we didn't have an executable before, but now we do, then the 417 // dyld module shared pointer might be unique and we may need to add 418 // it again (since Target::SetExecutableModule() will clear the 419 // images). So append the dyld module back to the list if it is 420 /// unique! 421 if (dyld_module_sp) 422 { 423 target.GetImages().AppendIfNeeded (dyld_module_sp); 424 425 // At this point we should have read in dyld's module, and so we should set breakpoints in it: 426 ModuleList modules; 427 modules.Append(dyld_module_sp); 428 target.ModulesDidLoad(modules); 429 m_dyld_module_wp = dyld_module_sp; 430 } 431 return true; 432 } 433 } 434 return false; 435 } 436 437 bool 438 DynamicLoaderMacOSXDYLD::NeedToLocateDYLD () const 439 { 440 return m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS; 441 } 442 443 //---------------------------------------------------------------------- 444 // Update the load addresses for all segments in MODULE using the 445 // updated INFO that is passed in. 446 //---------------------------------------------------------------------- 447 bool 448 DynamicLoaderMacOSXDYLD::UpdateImageLoadAddress (Module *module, DYLDImageInfo& info) 449 { 450 bool changed = false; 451 if (module) 452 { 453 ObjectFile *image_object_file = module->GetObjectFile(); 454 if (image_object_file) 455 { 456 SectionList *section_list = image_object_file->GetSectionList (); 457 if (section_list) 458 { 459 std::vector<uint32_t> inaccessible_segment_indexes; 460 // We now know the slide amount, so go through all sections 461 // and update the load addresses with the correct values. 462 const size_t num_segments = info.segments.size(); 463 for (size_t i=0; i<num_segments; ++i) 464 { 465 // Only load a segment if it has protections. Things like 466 // __PAGEZERO don't have any protections, and they shouldn't 467 // be slid 468 SectionSP section_sp(section_list->FindSectionByName(info.segments[i].name)); 469 470 if (info.segments[i].maxprot == 0) 471 { 472 inaccessible_segment_indexes.push_back(i); 473 } 474 else 475 { 476 const addr_t new_section_load_addr = info.segments[i].vmaddr + info.slide; 477 static ConstString g_section_name_LINKEDIT ("__LINKEDIT"); 478 479 if (section_sp) 480 { 481 // __LINKEDIT sections from files in the shared cache 482 // can overlap so check to see what the segment name is 483 // and pass "false" so we don't warn of overlapping 484 // "Section" objects, and "true" for all other sections. 485 const bool warn_multiple = section_sp->GetName() != g_section_name_LINKEDIT; 486 487 changed = m_process->GetTarget().SetSectionLoadAddress (section_sp, new_section_load_addr, warn_multiple); 488 } 489 else 490 { 491 Host::SystemLog (Host::eSystemLogWarning, 492 "warning: unable to find and load segment named '%s' at 0x%" PRIx64 " in '%s' in macosx dynamic loader plug-in.\n", 493 info.segments[i].name.AsCString("<invalid>"), 494 (uint64_t)new_section_load_addr, 495 image_object_file->GetFileSpec().GetPath().c_str()); 496 } 497 } 498 } 499 500 // If the loaded the file (it changed) and we have segments that 501 // are not readable or writeable, add them to the invalid memory 502 // region cache for the process. This will typically only be 503 // the __PAGEZERO segment in the main executable. We might be able 504 // to apply this more generally to more sections that have no 505 // protections in the future, but for now we are going to just 506 // do __PAGEZERO. 507 if (changed && !inaccessible_segment_indexes.empty()) 508 { 509 for (uint32_t i=0; i<inaccessible_segment_indexes.size(); ++i) 510 { 511 const uint32_t seg_idx = inaccessible_segment_indexes[i]; 512 SectionSP section_sp(section_list->FindSectionByName(info.segments[seg_idx].name)); 513 514 if (section_sp) 515 { 516 static ConstString g_pagezero_section_name("__PAGEZERO"); 517 if (g_pagezero_section_name == section_sp->GetName()) 518 { 519 // __PAGEZERO never slides... 520 const lldb::addr_t vmaddr = info.segments[seg_idx].vmaddr; 521 const lldb::addr_t vmsize = info.segments[seg_idx].vmsize; 522 Process::LoadRange pagezero_range (vmaddr, vmsize); 523 m_process->AddInvalidMemoryRegion(pagezero_range); 524 } 525 } 526 } 527 } 528 } 529 } 530 } 531 // We might have an in memory image that was loaded as soon as it was created 532 if (info.load_stop_id == m_process->GetStopID()) 533 changed = true; 534 else if (changed) 535 { 536 // Update the stop ID when this library was updated 537 info.load_stop_id = m_process->GetStopID(); 538 } 539 return changed; 540 } 541 542 //---------------------------------------------------------------------- 543 // Update the load addresses for all segments in MODULE using the 544 // updated INFO that is passed in. 545 //---------------------------------------------------------------------- 546 bool 547 DynamicLoaderMacOSXDYLD::UnloadImageLoadAddress (Module *module, DYLDImageInfo& info) 548 { 549 bool changed = false; 550 if (module) 551 { 552 ObjectFile *image_object_file = module->GetObjectFile(); 553 if (image_object_file) 554 { 555 SectionList *section_list = image_object_file->GetSectionList (); 556 if (section_list) 557 { 558 const size_t num_segments = info.segments.size(); 559 for (size_t i=0; i<num_segments; ++i) 560 { 561 SectionSP section_sp(section_list->FindSectionByName(info.segments[i].name)); 562 if (section_sp) 563 { 564 const addr_t old_section_load_addr = info.segments[i].vmaddr + info.slide; 565 if (m_process->GetTarget().SetSectionUnloaded (section_sp, old_section_load_addr)) 566 changed = true; 567 } 568 else 569 { 570 Host::SystemLog (Host::eSystemLogWarning, 571 "warning: unable to find and unload segment named '%s' in '%s' in macosx dynamic loader plug-in.\n", 572 info.segments[i].name.AsCString("<invalid>"), 573 image_object_file->GetFileSpec().GetPath().c_str()); 574 } 575 } 576 } 577 } 578 } 579 return changed; 580 } 581 582 583 //---------------------------------------------------------------------- 584 // Static callback function that gets called when our DYLD notification 585 // breakpoint gets hit. We update all of our image infos and then 586 // let our super class DynamicLoader class decide if we should stop 587 // or not (based on global preference). 588 //---------------------------------------------------------------------- 589 bool 590 DynamicLoaderMacOSXDYLD::NotifyBreakpointHit (void *baton, 591 StoppointCallbackContext *context, 592 lldb::user_id_t break_id, 593 lldb::user_id_t break_loc_id) 594 { 595 // Let the event know that the images have changed 596 // DYLD passes three arguments to the notification breakpoint. 597 // Arg1: enum dyld_image_mode mode - 0 = adding, 1 = removing 598 // Arg2: uint32_t infoCount - Number of shared libraries added 599 // Arg3: dyld_image_info info[] - Array of structs of the form: 600 // const struct mach_header *imageLoadAddress 601 // const char *imageFilePath 602 // uintptr_t imageFileModDate (a time_t) 603 604 DynamicLoaderMacOSXDYLD* dyld_instance = (DynamicLoaderMacOSXDYLD*) baton; 605 606 // First step is to see if we've already initialized the all image infos. If we haven't then this function 607 // will do so and return true. In the course of initializing the all_image_infos it will read the complete 608 // current state, so we don't need to figure out what has changed from the data passed in to us. 609 610 if (dyld_instance->InitializeFromAllImageInfos()) 611 return dyld_instance->GetStopWhenImagesChange(); 612 613 ExecutionContext exe_ctx (context->exe_ctx_ref); 614 Process *process = exe_ctx.GetProcessPtr(); 615 const lldb::ABISP &abi = process->GetABI(); 616 if (abi) 617 { 618 // Build up the value array to store the three arguments given above, then get the values from the ABI: 619 620 ClangASTContext *clang_ast_context = process->GetTarget().GetScratchClangASTContext(); 621 ValueList argument_values; 622 Value input_value; 623 624 ClangASTType clang_void_ptr_type = clang_ast_context->GetBasicType(eBasicTypeVoid).GetPointerType(); 625 ClangASTType clang_uint32_type = clang_ast_context->GetBuiltinTypeForEncodingAndBitSize(lldb::eEncodingUint, 32); 626 input_value.SetValueType (Value::eValueTypeScalar); 627 input_value.SetClangType (clang_uint32_type); 628 // input_value.SetContext (Value::eContextTypeClangType, clang_uint32_type); 629 argument_values.PushValue (input_value); 630 argument_values.PushValue (input_value); 631 input_value.SetClangType (clang_void_ptr_type); 632 // input_value.SetContext (Value::eContextTypeClangType, clang_void_ptr_type); 633 argument_values.PushValue (input_value); 634 635 if (abi->GetArgumentValues (exe_ctx.GetThreadRef(), argument_values)) 636 { 637 uint32_t dyld_mode = argument_values.GetValueAtIndex(0)->GetScalar().UInt (-1); 638 if (dyld_mode != -1) 639 { 640 // Okay the mode was right, now get the number of elements, and the array of new elements... 641 uint32_t image_infos_count = argument_values.GetValueAtIndex(1)->GetScalar().UInt (-1); 642 if (image_infos_count != -1) 643 { 644 // Got the number added, now go through the array of added elements, putting out the mach header 645 // address, and adding the image. 646 // Note, I'm not putting in logging here, since the AddModules & RemoveModules functions do 647 // all the logging internally. 648 649 lldb::addr_t image_infos_addr = argument_values.GetValueAtIndex(2)->GetScalar().ULongLong(); 650 if (dyld_mode == 0) 651 { 652 // This is add: 653 dyld_instance->AddModulesUsingImageInfosAddress (image_infos_addr, image_infos_count); 654 } 655 else 656 { 657 // This is remove: 658 dyld_instance->RemoveModulesUsingImageInfosAddress (image_infos_addr, image_infos_count); 659 } 660 661 } 662 } 663 } 664 } 665 666 // Return true to stop the target, false to just let the target run 667 return dyld_instance->GetStopWhenImagesChange(); 668 } 669 670 bool 671 DynamicLoaderMacOSXDYLD::ReadAllImageInfosStructure () 672 { 673 Mutex::Locker locker(m_mutex); 674 675 // the all image infos is already valid for this process stop ID 676 if (m_process->GetStopID() == m_dyld_all_image_infos_stop_id) 677 return true; 678 679 m_dyld_all_image_infos.Clear(); 680 if (m_dyld_all_image_infos_addr != LLDB_INVALID_ADDRESS) 681 { 682 ByteOrder byte_order = m_process->GetTarget().GetArchitecture().GetByteOrder(); 683 uint32_t addr_size = 4; 684 if (m_dyld_all_image_infos_addr > UINT32_MAX) 685 addr_size = 8; 686 687 uint8_t buf[256]; 688 DataExtractor data (buf, sizeof(buf), byte_order, addr_size); 689 lldb::offset_t offset = 0; 690 691 const size_t count_v2 = sizeof (uint32_t) + // version 692 sizeof (uint32_t) + // infoArrayCount 693 addr_size + // infoArray 694 addr_size + // notification 695 addr_size + // processDetachedFromSharedRegion + libSystemInitialized + pad 696 addr_size; // dyldImageLoadAddress 697 const size_t count_v11 = count_v2 + 698 addr_size + // jitInfo 699 addr_size + // dyldVersion 700 addr_size + // errorMessage 701 addr_size + // terminationFlags 702 addr_size + // coreSymbolicationShmPage 703 addr_size + // systemOrderFlag 704 addr_size + // uuidArrayCount 705 addr_size + // uuidArray 706 addr_size + // dyldAllImageInfosAddress 707 addr_size + // initialImageCount 708 addr_size + // errorKind 709 addr_size + // errorClientOfDylibPath 710 addr_size + // errorTargetDylibPath 711 addr_size; // errorSymbol 712 const size_t count_v13 = count_v11 + 713 addr_size + // sharedCacheSlide 714 sizeof (uuid_t); // sharedCacheUUID 715 assert (sizeof (buf) >= count_v13); 716 717 Error error; 718 if (m_process->ReadMemory (m_dyld_all_image_infos_addr, buf, 4, error) == 4) 719 { 720 m_dyld_all_image_infos.version = data.GetU32(&offset); 721 // If anything in the high byte is set, we probably got the byte 722 // order incorrect (the process might not have it set correctly 723 // yet due to attaching to a program without a specified file). 724 if (m_dyld_all_image_infos.version & 0xff000000) 725 { 726 // We have guessed the wrong byte order. Swap it and try 727 // reading the version again. 728 if (byte_order == eByteOrderLittle) 729 byte_order = eByteOrderBig; 730 else 731 byte_order = eByteOrderLittle; 732 733 data.SetByteOrder (byte_order); 734 offset = 0; 735 m_dyld_all_image_infos.version = data.GetU32(&offset); 736 } 737 } 738 else 739 { 740 return false; 741 } 742 743 const size_t count = (m_dyld_all_image_infos.version >= 11) ? count_v11 : count_v2; 744 745 const size_t bytes_read = m_process->ReadMemory (m_dyld_all_image_infos_addr, buf, count, error); 746 if (bytes_read == count) 747 { 748 offset = 0; 749 m_dyld_all_image_infos.version = data.GetU32(&offset); 750 m_dyld_all_image_infos.dylib_info_count = data.GetU32(&offset); 751 m_dyld_all_image_infos.dylib_info_addr = data.GetPointer(&offset); 752 m_dyld_all_image_infos.notification = data.GetPointer(&offset); 753 m_dyld_all_image_infos.processDetachedFromSharedRegion = data.GetU8(&offset); 754 m_dyld_all_image_infos.libSystemInitialized = data.GetU8(&offset); 755 // Adjust for padding. 756 offset += addr_size - 2; 757 m_dyld_all_image_infos.dyldImageLoadAddress = data.GetPointer(&offset); 758 if (m_dyld_all_image_infos.version >= 11) 759 { 760 offset += addr_size * 8; 761 uint64_t dyld_all_image_infos_addr = data.GetPointer(&offset); 762 763 // When we started, we were given the actual address of the all_image_infos 764 // struct (probably via TASK_DYLD_INFO) in memory - this address is stored in 765 // m_dyld_all_image_infos_addr and is the most accurate address we have. 766 767 // We read the dyld_all_image_infos struct from memory; it contains its own address. 768 // If the address in the struct does not match the actual address, 769 // the dyld we're looking at has been loaded at a different location (slid) from 770 // where it intended to load. The addresses in the dyld_all_image_infos struct 771 // are the original, non-slid addresses, and need to be adjusted. Most importantly 772 // the address of dyld and the notification address need to be adjusted. 773 774 if (dyld_all_image_infos_addr != m_dyld_all_image_infos_addr) 775 { 776 uint64_t image_infos_offset = dyld_all_image_infos_addr - m_dyld_all_image_infos.dyldImageLoadAddress; 777 uint64_t notification_offset = m_dyld_all_image_infos.notification - m_dyld_all_image_infos.dyldImageLoadAddress; 778 m_dyld_all_image_infos.dyldImageLoadAddress = m_dyld_all_image_infos_addr - image_infos_offset; 779 m_dyld_all_image_infos.notification = m_dyld_all_image_infos.dyldImageLoadAddress + notification_offset; 780 } 781 } 782 m_dyld_all_image_infos_stop_id = m_process->GetStopID(); 783 return true; 784 } 785 } 786 return false; 787 } 788 789 790 bool 791 DynamicLoaderMacOSXDYLD::AddModulesUsingImageInfosAddress (lldb::addr_t image_infos_addr, uint32_t image_infos_count) 792 { 793 DYLDImageInfo::collection image_infos; 794 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); 795 if (log) 796 log->Printf ("Adding %d modules.\n", image_infos_count); 797 798 Mutex::Locker locker(m_mutex); 799 if (m_process->GetStopID() == m_dyld_image_infos_stop_id) 800 return true; 801 802 if (!ReadImageInfos (image_infos_addr, image_infos_count, image_infos)) 803 return false; 804 805 UpdateImageInfosHeaderAndLoadCommands (image_infos, image_infos_count, false); 806 bool return_value = AddModulesUsingImageInfos (image_infos); 807 m_dyld_image_infos_stop_id = m_process->GetStopID(); 808 return return_value; 809 } 810 811 // Adds the modules in image_infos to m_dyld_image_infos. 812 // NB don't call this passing in m_dyld_image_infos. 813 814 bool 815 DynamicLoaderMacOSXDYLD::AddModulesUsingImageInfos (DYLDImageInfo::collection &image_infos) 816 { 817 // Now add these images to the main list. 818 ModuleList loaded_module_list; 819 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); 820 Target &target = m_process->GetTarget(); 821 ModuleList& target_images = target.GetImages(); 822 823 for (uint32_t idx = 0; idx < image_infos.size(); ++idx) 824 { 825 if (log) 826 { 827 log->Printf ("Adding new image at address=0x%16.16" PRIx64 ".", image_infos[idx].address); 828 image_infos[idx].PutToLog (log); 829 } 830 831 m_dyld_image_infos.push_back(image_infos[idx]); 832 833 ModuleSP image_module_sp (FindTargetModuleForDYLDImageInfo (image_infos[idx], true, NULL)); 834 835 if (image_module_sp) 836 { 837 if (image_infos[idx].header.filetype == llvm::MachO::MH_DYLINKER) 838 image_module_sp->SetIsDynamicLinkEditor (true); 839 840 ObjectFile *objfile = image_module_sp->GetObjectFile (); 841 if (objfile) 842 { 843 SectionList *sections = objfile->GetSectionList(); 844 if (sections) 845 { 846 ConstString commpage_dbstr("__commpage"); 847 Section *commpage_section = sections->FindSectionByName(commpage_dbstr).get(); 848 if (commpage_section) 849 { 850 ModuleSpec module_spec (objfile->GetFileSpec(), image_infos[idx].GetArchitecture ()); 851 module_spec.GetObjectName() = commpage_dbstr; 852 ModuleSP commpage_image_module_sp(target_images.FindFirstModule (module_spec)); 853 if (!commpage_image_module_sp) 854 { 855 module_spec.SetObjectOffset (objfile->GetFileOffset() + commpage_section->GetFileOffset()); 856 commpage_image_module_sp = target.GetSharedModule (module_spec); 857 if (!commpage_image_module_sp || commpage_image_module_sp->GetObjectFile() == NULL) 858 { 859 commpage_image_module_sp = m_process->ReadModuleFromMemory (image_infos[idx].file_spec, 860 image_infos[idx].address); 861 // Always load a memory image right away in the target in case 862 // we end up trying to read the symbol table from memory... The 863 // __LINKEDIT will need to be mapped so we can figure out where 864 // the symbol table bits are... 865 bool changed = false; 866 UpdateImageLoadAddress (commpage_image_module_sp.get(), image_infos[idx]); 867 target.GetImages().Append(commpage_image_module_sp); 868 if (changed) 869 { 870 image_infos[idx].load_stop_id = m_process->GetStopID(); 871 loaded_module_list.AppendIfNeeded (commpage_image_module_sp); 872 } 873 } 874 } 875 } 876 } 877 } 878 879 // UpdateImageLoadAddress will return true if any segments 880 // change load address. We need to check this so we don't 881 // mention that all loaded shared libraries are newly loaded 882 // each time we hit out dyld breakpoint since dyld will list all 883 // shared libraries each time. 884 if (UpdateImageLoadAddress (image_module_sp.get(), image_infos[idx])) 885 { 886 target_images.AppendIfNeeded(image_module_sp); 887 loaded_module_list.AppendIfNeeded (image_module_sp); 888 } 889 } 890 } 891 892 if (loaded_module_list.GetSize() > 0) 893 { 894 // FIXME: This should really be in the Runtime handlers class, which should get 895 // called by the target's ModulesDidLoad, but we're doing it all locally for now 896 // to save time. 897 // Also, I'm assuming there can be only one libobjc dylib loaded... 898 899 ObjCLanguageRuntime *objc_runtime = m_process->GetObjCLanguageRuntime(true); 900 if (objc_runtime != NULL && !objc_runtime->HasReadObjCLibrary()) 901 { 902 size_t num_modules = loaded_module_list.GetSize(); 903 for (size_t i = 0; i < num_modules; i++) 904 { 905 if (objc_runtime->IsModuleObjCLibrary (loaded_module_list.GetModuleAtIndex (i))) 906 { 907 objc_runtime->ReadObjCLibrary (loaded_module_list.GetModuleAtIndex (i)); 908 break; 909 } 910 } 911 } 912 if (log) 913 loaded_module_list.LogUUIDAndPaths (log, "DynamicLoaderMacOSXDYLD::ModulesDidLoad"); 914 m_process->GetTarget().ModulesDidLoad (loaded_module_list); 915 } 916 return true; 917 } 918 919 bool 920 DynamicLoaderMacOSXDYLD::RemoveModulesUsingImageInfosAddress (lldb::addr_t image_infos_addr, uint32_t image_infos_count) 921 { 922 DYLDImageInfo::collection image_infos; 923 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); 924 925 Mutex::Locker locker(m_mutex); 926 if (m_process->GetStopID() == m_dyld_image_infos_stop_id) 927 return true; 928 929 // First read in the image_infos for the removed modules, and their headers & load commands. 930 if (!ReadImageInfos (image_infos_addr, image_infos_count, image_infos)) 931 { 932 if (log) 933 log->PutCString ("Failed reading image infos array."); 934 return false; 935 } 936 937 if (log) 938 log->Printf ("Removing %d modules.", image_infos_count); 939 940 ModuleList unloaded_module_list; 941 for (uint32_t idx = 0; idx < image_infos.size(); ++idx) 942 { 943 if (log) 944 { 945 log->Printf ("Removing module at address=0x%16.16" PRIx64 ".", image_infos[idx].address); 946 image_infos[idx].PutToLog (log); 947 } 948 949 // Remove this image_infos from the m_all_image_infos. We do the comparision by address 950 // rather than by file spec because we can have many modules with the same "file spec" in the 951 // case that they are modules loaded from memory. 952 // 953 // Also copy over the uuid from the old entry to the removed entry so we can 954 // use it to lookup the module in the module list. 955 956 DYLDImageInfo::collection::iterator pos, end = m_dyld_image_infos.end(); 957 for (pos = m_dyld_image_infos.begin(); pos != end; pos++) 958 { 959 if (image_infos[idx].address == (*pos).address) 960 { 961 image_infos[idx].uuid = (*pos).uuid; 962 963 // Add the module from this image_info to the "unloaded_module_list". We'll remove them all at 964 // one go later on. 965 966 ModuleSP unload_image_module_sp (FindTargetModuleForDYLDImageInfo (image_infos[idx], false, NULL)); 967 if (unload_image_module_sp.get()) 968 { 969 // When we unload, be sure to use the image info from the old list, 970 // since that has sections correctly filled in. 971 UnloadImageLoadAddress (unload_image_module_sp.get(), *pos); 972 unloaded_module_list.AppendIfNeeded (unload_image_module_sp); 973 } 974 else 975 { 976 if (log) 977 { 978 log->Printf ("Could not find module for unloading info entry:"); 979 image_infos[idx].PutToLog(log); 980 } 981 } 982 983 // Then remove it from the m_dyld_image_infos: 984 985 m_dyld_image_infos.erase(pos); 986 break; 987 } 988 } 989 990 if (pos == end) 991 { 992 if (log) 993 { 994 log->Printf ("Could not find image_info entry for unloading image:"); 995 image_infos[idx].PutToLog(log); 996 } 997 } 998 } 999 if (unloaded_module_list.GetSize() > 0) 1000 { 1001 if (log) 1002 { 1003 log->PutCString("Unloaded:"); 1004 unloaded_module_list.LogUUIDAndPaths (log, "DynamicLoaderMacOSXDYLD::ModulesDidUnload"); 1005 } 1006 m_process->GetTarget().GetImages().Remove (unloaded_module_list); 1007 } 1008 m_dyld_image_infos_stop_id = m_process->GetStopID(); 1009 return true; 1010 } 1011 1012 bool 1013 DynamicLoaderMacOSXDYLD::ReadImageInfos (lldb::addr_t image_infos_addr, 1014 uint32_t image_infos_count, 1015 DYLDImageInfo::collection &image_infos) 1016 { 1017 const ByteOrder endian = m_dyld.GetByteOrder(); 1018 const uint32_t addr_size = m_dyld.GetAddressByteSize(); 1019 1020 image_infos.resize(image_infos_count); 1021 const size_t count = image_infos.size() * 3 * addr_size; 1022 DataBufferHeap info_data(count, 0); 1023 Error error; 1024 const size_t bytes_read = m_process->ReadMemory (image_infos_addr, 1025 info_data.GetBytes(), 1026 info_data.GetByteSize(), 1027 error); 1028 if (bytes_read == count) 1029 { 1030 lldb::offset_t info_data_offset = 0; 1031 DataExtractor info_data_ref(info_data.GetBytes(), info_data.GetByteSize(), endian, addr_size); 1032 for (size_t i = 0; i < image_infos.size() && info_data_ref.ValidOffset(info_data_offset); i++) 1033 { 1034 image_infos[i].address = info_data_ref.GetPointer(&info_data_offset); 1035 lldb::addr_t path_addr = info_data_ref.GetPointer(&info_data_offset); 1036 image_infos[i].mod_date = info_data_ref.GetPointer(&info_data_offset); 1037 1038 char raw_path[PATH_MAX]; 1039 m_process->ReadCStringFromMemory (path_addr, raw_path, sizeof(raw_path), error); 1040 // don't resolve the path 1041 if (error.Success()) 1042 { 1043 const bool resolve_path = false; 1044 image_infos[i].file_spec.SetFile(raw_path, resolve_path); 1045 } 1046 } 1047 return true; 1048 } 1049 else 1050 { 1051 return false; 1052 } 1053 } 1054 1055 //---------------------------------------------------------------------- 1056 // If we have found where the "_dyld_all_image_infos" lives in memory, 1057 // read the current info from it, and then update all image load 1058 // addresses (or lack thereof). Only do this if this is the first time 1059 // we're reading the dyld infos. Return true if we actually read anything, 1060 // and false otherwise. 1061 //---------------------------------------------------------------------- 1062 bool 1063 DynamicLoaderMacOSXDYLD::InitializeFromAllImageInfos () 1064 { 1065 Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); 1066 1067 Mutex::Locker locker(m_mutex); 1068 if (m_process->GetStopID() == m_dyld_image_infos_stop_id 1069 || m_dyld_image_infos.size() != 0) 1070 return false; 1071 1072 if (ReadAllImageInfosStructure ()) 1073 { 1074 // Nothing to load or unload? 1075 if (m_dyld_all_image_infos.dylib_info_count == 0) 1076 return true; 1077 1078 if (m_dyld_all_image_infos.dylib_info_addr == 0) 1079 { 1080 // DYLD is updating the images now. So we should say we have no images, and then we'll 1081 // figure it out when we hit the added breakpoint. 1082 return false; 1083 } 1084 else 1085 { 1086 if (!AddModulesUsingImageInfosAddress (m_dyld_all_image_infos.dylib_info_addr, 1087 m_dyld_all_image_infos.dylib_info_count)) 1088 { 1089 DEBUG_PRINTF("%s", "unable to read all data for all_dylib_infos."); 1090 m_dyld_image_infos.clear(); 1091 } 1092 } 1093 1094 // Now we have one more bit of business. If there is a library left in the images for our target that 1095 // doesn't have a load address, then it must be something that we were expecting to load (for instance we 1096 // read a load command for it) but it didn't in fact load - probably because DYLD_*_PATH pointed 1097 // to an equivalent version. We don't want it to stay in the target's module list or it will confuse 1098 // us, so unload it here. 1099 Target &target = m_process->GetTarget(); 1100 const ModuleList &target_modules = target.GetImages(); 1101 ModuleList not_loaded_modules; 1102 Mutex::Locker modules_locker(target_modules.GetMutex()); 1103 1104 size_t num_modules = target_modules.GetSize(); 1105 for (size_t i = 0; i < num_modules; i++) 1106 { 1107 ModuleSP module_sp = target_modules.GetModuleAtIndexUnlocked (i); 1108 if (!module_sp->IsLoadedInTarget (&target)) 1109 { 1110 if (log) 1111 { 1112 StreamString s; 1113 module_sp->GetDescription (&s); 1114 log->Printf ("Unloading pre-run module: %s.", s.GetData ()); 1115 } 1116 not_loaded_modules.Append (module_sp); 1117 } 1118 } 1119 1120 if (not_loaded_modules.GetSize() != 0) 1121 { 1122 target.GetImages().Remove(not_loaded_modules); 1123 } 1124 1125 return true; 1126 } 1127 else 1128 return false; 1129 } 1130 1131 //---------------------------------------------------------------------- 1132 // Read a mach_header at ADDR into HEADER, and also fill in the load 1133 // command data into LOAD_COMMAND_DATA if it is non-NULL. 1134 // 1135 // Returns true if we succeed, false if we fail for any reason. 1136 //---------------------------------------------------------------------- 1137 bool 1138 DynamicLoaderMacOSXDYLD::ReadMachHeader (lldb::addr_t addr, llvm::MachO::mach_header *header, DataExtractor *load_command_data) 1139 { 1140 DataBufferHeap header_bytes(sizeof(llvm::MachO::mach_header), 0); 1141 Error error; 1142 size_t bytes_read = m_process->ReadMemory (addr, 1143 header_bytes.GetBytes(), 1144 header_bytes.GetByteSize(), 1145 error); 1146 if (bytes_read == sizeof(llvm::MachO::mach_header)) 1147 { 1148 lldb::offset_t offset = 0; 1149 ::memset (header, 0, sizeof(llvm::MachO::mach_header)); 1150 1151 // Get the magic byte unswapped so we can figure out what we are dealing with 1152 DataExtractor data(header_bytes.GetBytes(), header_bytes.GetByteSize(), lldb::endian::InlHostByteOrder(), 4); 1153 header->magic = data.GetU32(&offset); 1154 lldb::addr_t load_cmd_addr = addr; 1155 data.SetByteOrder(DynamicLoaderMacOSXDYLD::GetByteOrderFromMagic(header->magic)); 1156 switch (header->magic) 1157 { 1158 case llvm::MachO::MH_MAGIC: 1159 case llvm::MachO::MH_CIGAM: 1160 data.SetAddressByteSize(4); 1161 load_cmd_addr += sizeof(llvm::MachO::mach_header); 1162 break; 1163 1164 case llvm::MachO::MH_MAGIC_64: 1165 case llvm::MachO::MH_CIGAM_64: 1166 data.SetAddressByteSize(8); 1167 load_cmd_addr += sizeof(llvm::MachO::mach_header_64); 1168 break; 1169 1170 default: 1171 return false; 1172 } 1173 1174 // Read the rest of dyld's mach header 1175 if (data.GetU32(&offset, &header->cputype, (sizeof(llvm::MachO::mach_header)/sizeof(uint32_t)) - 1)) 1176 { 1177 if (load_command_data == NULL) 1178 return true; // We were able to read the mach_header and weren't asked to read the load command bytes 1179 1180 DataBufferSP load_cmd_data_sp(new DataBufferHeap(header->sizeofcmds, 0)); 1181 1182 size_t load_cmd_bytes_read = m_process->ReadMemory (load_cmd_addr, 1183 load_cmd_data_sp->GetBytes(), 1184 load_cmd_data_sp->GetByteSize(), 1185 error); 1186 1187 if (load_cmd_bytes_read == header->sizeofcmds) 1188 { 1189 // Set the load command data and also set the correct endian 1190 // swap settings and the correct address size 1191 load_command_data->SetData(load_cmd_data_sp, 0, header->sizeofcmds); 1192 load_command_data->SetByteOrder(data.GetByteOrder()); 1193 load_command_data->SetAddressByteSize(data.GetAddressByteSize()); 1194 return true; // We successfully read the mach_header and the load command data 1195 } 1196 1197 return false; // We weren't able to read the load command data 1198 } 1199 } 1200 return false; // We failed the read the mach_header 1201 } 1202 1203 1204 //---------------------------------------------------------------------- 1205 // Parse the load commands for an image 1206 //---------------------------------------------------------------------- 1207 uint32_t 1208 DynamicLoaderMacOSXDYLD::ParseLoadCommands (const DataExtractor& data, DYLDImageInfo& dylib_info, FileSpec *lc_id_dylinker) 1209 { 1210 lldb::offset_t offset = 0; 1211 uint32_t cmd_idx; 1212 Segment segment; 1213 dylib_info.Clear (true); 1214 1215 for (cmd_idx = 0; cmd_idx < dylib_info.header.ncmds; cmd_idx++) 1216 { 1217 // Clear out any load command specific data from DYLIB_INFO since 1218 // we are about to read it. 1219 1220 if (data.ValidOffsetForDataOfSize (offset, sizeof(llvm::MachO::load_command))) 1221 { 1222 llvm::MachO::load_command load_cmd; 1223 lldb::offset_t load_cmd_offset = offset; 1224 load_cmd.cmd = data.GetU32 (&offset); 1225 load_cmd.cmdsize = data.GetU32 (&offset); 1226 switch (load_cmd.cmd) 1227 { 1228 case llvm::MachO::LC_SEGMENT: 1229 { 1230 segment.name.SetTrimmedCStringWithLength ((const char *)data.GetData(&offset, 16), 16); 1231 // We are putting 4 uint32_t values 4 uint64_t values so 1232 // we have to use multiple 32 bit gets below. 1233 segment.vmaddr = data.GetU32 (&offset); 1234 segment.vmsize = data.GetU32 (&offset); 1235 segment.fileoff = data.GetU32 (&offset); 1236 segment.filesize = data.GetU32 (&offset); 1237 // Extract maxprot, initprot, nsects and flags all at once 1238 data.GetU32(&offset, &segment.maxprot, 4); 1239 dylib_info.segments.push_back (segment); 1240 } 1241 break; 1242 1243 case llvm::MachO::LC_SEGMENT_64: 1244 { 1245 segment.name.SetTrimmedCStringWithLength ((const char *)data.GetData(&offset, 16), 16); 1246 // Extract vmaddr, vmsize, fileoff, and filesize all at once 1247 data.GetU64(&offset, &segment.vmaddr, 4); 1248 // Extract maxprot, initprot, nsects and flags all at once 1249 data.GetU32(&offset, &segment.maxprot, 4); 1250 dylib_info.segments.push_back (segment); 1251 } 1252 break; 1253 1254 case llvm::MachO::LC_ID_DYLINKER: 1255 if (lc_id_dylinker) 1256 { 1257 const lldb::offset_t name_offset = load_cmd_offset + data.GetU32 (&offset); 1258 const char *path = data.PeekCStr (name_offset); 1259 lc_id_dylinker->SetFile (path, true); 1260 } 1261 break; 1262 1263 case llvm::MachO::LC_UUID: 1264 dylib_info.uuid.SetBytes(data.GetData (&offset, 16)); 1265 break; 1266 1267 default: 1268 break; 1269 } 1270 // Set offset to be the beginning of the next load command. 1271 offset = load_cmd_offset + load_cmd.cmdsize; 1272 } 1273 } 1274 1275 // All sections listed in the dyld image info structure will all 1276 // either be fixed up already, or they will all be off by a single 1277 // slide amount that is determined by finding the first segment 1278 // that is at file offset zero which also has bytes (a file size 1279 // that is greater than zero) in the object file. 1280 1281 // Determine the slide amount (if any) 1282 const size_t num_sections = dylib_info.segments.size(); 1283 for (size_t i = 0; i < num_sections; ++i) 1284 { 1285 // Iterate through the object file sections to find the 1286 // first section that starts of file offset zero and that 1287 // has bytes in the file... 1288 if (dylib_info.segments[i].fileoff == 0 && dylib_info.segments[i].filesize > 0) 1289 { 1290 dylib_info.slide = dylib_info.address - dylib_info.segments[i].vmaddr; 1291 // We have found the slide amount, so we can exit 1292 // this for loop. 1293 break; 1294 } 1295 } 1296 return cmd_idx; 1297 } 1298 1299 //---------------------------------------------------------------------- 1300 // Read the mach_header and load commands for each image that the 1301 // _dyld_all_image_infos structure points to and cache the results. 1302 //---------------------------------------------------------------------- 1303 1304 void 1305 DynamicLoaderMacOSXDYLD::UpdateImageInfosHeaderAndLoadCommands(DYLDImageInfo::collection &image_infos, 1306 uint32_t infos_count, 1307 bool update_executable) 1308 { 1309 uint32_t exe_idx = UINT32_MAX; 1310 // Read any UUID values that we can get 1311 for (uint32_t i = 0; i < infos_count; i++) 1312 { 1313 if (!image_infos[i].UUIDValid()) 1314 { 1315 DataExtractor data; // Load command data 1316 if (!ReadMachHeader (image_infos[i].address, &image_infos[i].header, &data)) 1317 continue; 1318 1319 ParseLoadCommands (data, image_infos[i], NULL); 1320 1321 if (image_infos[i].header.filetype == llvm::MachO::MH_EXECUTE) 1322 exe_idx = i; 1323 1324 } 1325 } 1326 1327 Target &target = m_process->GetTarget(); 1328 1329 if (exe_idx < image_infos.size()) 1330 { 1331 const bool can_create = true; 1332 ModuleSP exe_module_sp (FindTargetModuleForDYLDImageInfo (image_infos[exe_idx], can_create, NULL)); 1333 1334 if (exe_module_sp) 1335 { 1336 UpdateImageLoadAddress (exe_module_sp.get(), image_infos[exe_idx]); 1337 1338 if (exe_module_sp.get() != target.GetExecutableModulePointer()) 1339 { 1340 // Don't load dependent images since we are in dyld where we will know 1341 // and find out about all images that are loaded. Also when setting the 1342 // executable module, it will clear the targets module list, and if we 1343 // have an in memory dyld module, it will get removed from the list 1344 // so we will need to add it back after setting the executable module, 1345 // so we first try and see if we already have a weak pointer to the 1346 // dyld module, make it into a shared pointer, then add the executable, 1347 // then re-add it back to make sure it is always in the list. 1348 ModuleSP dyld_module_sp(m_dyld_module_wp.lock()); 1349 1350 const bool get_dependent_images = false; 1351 m_process->GetTarget().SetExecutableModule (exe_module_sp, 1352 get_dependent_images); 1353 1354 if (dyld_module_sp) 1355 target.GetImages().AppendIfNeeded (dyld_module_sp); 1356 } 1357 } 1358 } 1359 } 1360 1361 //---------------------------------------------------------------------- 1362 // On Mac OS X libobjc (the Objective-C runtime) has several critical dispatch 1363 // functions written in hand-written assembly, and also have hand-written unwind 1364 // information in the eh_frame section. Normally we prefer analyzing the 1365 // assembly instructions of a curently executing frame to unwind from that frame -- 1366 // but on hand-written functions this profiling can fail. We should use the 1367 // eh_frame instructions for these functions all the time. 1368 // 1369 // As an aside, it would be better if the eh_frame entries had a flag (or were 1370 // extensible so they could have an Apple-specific flag) which indicates that 1371 // the instructions are asynchronous -- accurate at every instruction, instead 1372 // of our normal default assumption that they are not. 1373 //---------------------------------------------------------------------- 1374 1375 bool 1376 DynamicLoaderMacOSXDYLD::AlwaysRelyOnEHUnwindInfo (SymbolContext &sym_ctx) 1377 { 1378 ModuleSP module_sp; 1379 if (sym_ctx.symbol) 1380 { 1381 module_sp = sym_ctx.symbol->GetAddress().GetModule(); 1382 } 1383 if (module_sp.get() == NULL && sym_ctx.function) 1384 { 1385 module_sp = sym_ctx.function->GetAddressRange().GetBaseAddress().GetModule(); 1386 } 1387 if (module_sp.get() == NULL) 1388 return false; 1389 1390 ObjCLanguageRuntime *objc_runtime = m_process->GetObjCLanguageRuntime(); 1391 if (objc_runtime != NULL && objc_runtime->IsModuleObjCLibrary (module_sp)) 1392 { 1393 return true; 1394 } 1395 1396 return false; 1397 } 1398 1399 1400 1401 //---------------------------------------------------------------------- 1402 // Dump a Segment to the file handle provided. 1403 //---------------------------------------------------------------------- 1404 void 1405 DynamicLoaderMacOSXDYLD::Segment::PutToLog (Log *log, lldb::addr_t slide) const 1406 { 1407 if (log) 1408 { 1409 if (slide == 0) 1410 log->Printf ("\t\t%16s [0x%16.16" PRIx64 " - 0x%16.16" PRIx64 ")", 1411 name.AsCString(""), 1412 vmaddr + slide, 1413 vmaddr + slide + vmsize); 1414 else 1415 log->Printf ("\t\t%16s [0x%16.16" PRIx64 " - 0x%16.16" PRIx64 ") slide = 0x%" PRIx64, 1416 name.AsCString(""), 1417 vmaddr + slide, 1418 vmaddr + slide + vmsize, 1419 slide); 1420 } 1421 } 1422 1423 const DynamicLoaderMacOSXDYLD::Segment * 1424 DynamicLoaderMacOSXDYLD::DYLDImageInfo::FindSegment (const ConstString &name) const 1425 { 1426 const size_t num_segments = segments.size(); 1427 for (size_t i=0; i<num_segments; ++i) 1428 { 1429 if (segments[i].name == name) 1430 return &segments[i]; 1431 } 1432 return NULL; 1433 } 1434 1435 1436 //---------------------------------------------------------------------- 1437 // Dump an image info structure to the file handle provided. 1438 //---------------------------------------------------------------------- 1439 void 1440 DynamicLoaderMacOSXDYLD::DYLDImageInfo::PutToLog (Log *log) const 1441 { 1442 if (log == NULL) 1443 return; 1444 uint8_t *u = (uint8_t *)uuid.GetBytes(); 1445 1446 if (address == LLDB_INVALID_ADDRESS) 1447 { 1448 if (u) 1449 { 1450 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)", 1451 mod_date, 1452 u[ 0], u[ 1], u[ 2], u[ 3], 1453 u[ 4], u[ 5], u[ 6], u[ 7], 1454 u[ 8], u[ 9], u[10], u[11], 1455 u[12], u[13], u[14], u[15], 1456 file_spec.GetPath().c_str()); 1457 } 1458 else 1459 log->Printf("\t modtime=0x%8.8" PRIx64 " path='%s' (UNLOADED)", 1460 mod_date, 1461 file_spec.GetPath().c_str()); 1462 } 1463 else 1464 { 1465 if (u) 1466 { 1467 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'", 1468 address, 1469 mod_date, 1470 u[ 0], u[ 1], u[ 2], u[ 3], 1471 u[ 4], u[ 5], u[ 6], u[ 7], 1472 u[ 8], u[ 9], u[10], u[11], 1473 u[12], u[13], u[14], u[15], 1474 file_spec.GetPath().c_str()); 1475 } 1476 else 1477 { 1478 log->Printf("\taddress=0x%16.16" PRIx64 " modtime=0x%8.8" PRIx64 " path='%s'", 1479 address, 1480 mod_date, 1481 file_spec.GetPath().c_str()); 1482 1483 } 1484 for (uint32_t i=0; i<segments.size(); ++i) 1485 segments[i].PutToLog(log, slide); 1486 } 1487 } 1488 1489 //---------------------------------------------------------------------- 1490 // Dump the _dyld_all_image_infos members and all current image infos 1491 // that we have parsed to the file handle provided. 1492 //---------------------------------------------------------------------- 1493 void 1494 DynamicLoaderMacOSXDYLD::PutToLog(Log *log) const 1495 { 1496 if (log == NULL) 1497 return; 1498 1499 Mutex::Locker locker(m_mutex); 1500 log->Printf("dyld_all_image_infos = { version=%d, count=%d, addr=0x%8.8" PRIx64 ", notify=0x%8.8" PRIx64 " }", 1501 m_dyld_all_image_infos.version, 1502 m_dyld_all_image_infos.dylib_info_count, 1503 (uint64_t)m_dyld_all_image_infos.dylib_info_addr, 1504 (uint64_t)m_dyld_all_image_infos.notification); 1505 size_t i; 1506 const size_t count = m_dyld_image_infos.size(); 1507 if (count > 0) 1508 { 1509 log->PutCString("Loaded:"); 1510 for (i = 0; i<count; i++) 1511 m_dyld_image_infos[i].PutToLog(log); 1512 } 1513 } 1514 1515 void 1516 DynamicLoaderMacOSXDYLD::PrivateInitialize(Process *process) 1517 { 1518 DEBUG_PRINTF("DynamicLoaderMacOSXDYLD::%s() process state = %s\n", __FUNCTION__, StateAsCString(m_process->GetState())); 1519 Clear(true); 1520 m_process = process; 1521 m_process->GetTarget().ClearAllLoadedSections(); 1522 } 1523 1524 bool 1525 DynamicLoaderMacOSXDYLD::SetNotificationBreakpoint () 1526 { 1527 DEBUG_PRINTF("DynamicLoaderMacOSXDYLD::%s() process state = %s\n", __FUNCTION__, StateAsCString(m_process->GetState())); 1528 if (m_break_id == LLDB_INVALID_BREAK_ID) 1529 { 1530 if (m_dyld_all_image_infos.notification != LLDB_INVALID_ADDRESS) 1531 { 1532 Address so_addr; 1533 // Set the notification breakpoint and install a breakpoint 1534 // callback function that will get called each time the 1535 // breakpoint gets hit. We will use this to track when shared 1536 // libraries get loaded/unloaded. 1537 bool resolved = m_process->GetTarget().ResolveLoadAddress(m_dyld_all_image_infos.notification, so_addr); 1538 if (!resolved) 1539 { 1540 ModuleSP dyld_module_sp = m_dyld_module_wp.lock(); 1541 if (dyld_module_sp) 1542 { 1543 UpdateImageLoadAddress (dyld_module_sp.get(), m_dyld); 1544 resolved = m_process->GetTarget().ResolveLoadAddress(m_dyld_all_image_infos.notification, so_addr); 1545 } 1546 } 1547 1548 if (resolved) 1549 { 1550 Breakpoint *dyld_break = m_process->GetTarget().CreateBreakpoint (so_addr, true, false).get(); 1551 dyld_break->SetCallback (DynamicLoaderMacOSXDYLD::NotifyBreakpointHit, this, true); 1552 dyld_break->SetBreakpointKind ("shared-library-event"); 1553 m_break_id = dyld_break->GetID(); 1554 } 1555 } 1556 } 1557 return m_break_id != LLDB_INVALID_BREAK_ID; 1558 } 1559 1560 //---------------------------------------------------------------------- 1561 // Member function that gets called when the process state changes. 1562 //---------------------------------------------------------------------- 1563 void 1564 DynamicLoaderMacOSXDYLD::PrivateProcessStateChanged (Process *process, StateType state) 1565 { 1566 DEBUG_PRINTF("DynamicLoaderMacOSXDYLD::%s(%s)\n", __FUNCTION__, StateAsCString(state)); 1567 switch (state) 1568 { 1569 case eStateConnected: 1570 case eStateAttaching: 1571 case eStateLaunching: 1572 case eStateInvalid: 1573 case eStateUnloaded: 1574 case eStateExited: 1575 case eStateDetached: 1576 Clear(false); 1577 break; 1578 1579 case eStateStopped: 1580 // Keep trying find dyld and set our notification breakpoint each time 1581 // we stop until we succeed 1582 if (!DidSetNotificationBreakpoint () && m_process->IsAlive()) 1583 { 1584 if (NeedToLocateDYLD ()) 1585 LocateDYLD (); 1586 1587 SetNotificationBreakpoint (); 1588 } 1589 break; 1590 1591 case eStateRunning: 1592 case eStateStepping: 1593 case eStateCrashed: 1594 case eStateSuspended: 1595 break; 1596 } 1597 } 1598 1599 ThreadPlanSP 1600 DynamicLoaderMacOSXDYLD::GetStepThroughTrampolinePlan (Thread &thread, bool stop_others) 1601 { 1602 ThreadPlanSP thread_plan_sp; 1603 StackFrame *current_frame = thread.GetStackFrameAtIndex(0).get(); 1604 const SymbolContext ¤t_context = current_frame->GetSymbolContext(eSymbolContextSymbol); 1605 Symbol *current_symbol = current_context.symbol; 1606 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 1607 TargetSP target_sp (thread.CalculateTarget()); 1608 1609 if (current_symbol != NULL) 1610 { 1611 std::vector<Address> addresses; 1612 1613 if (current_symbol->IsTrampoline()) 1614 { 1615 const ConstString &trampoline_name = current_symbol->GetMangled().GetName(Mangled::ePreferMangled); 1616 1617 if (trampoline_name) 1618 { 1619 const ModuleList &images = target_sp->GetImages(); 1620 1621 SymbolContextList code_symbols; 1622 images.FindSymbolsWithNameAndType(trampoline_name, eSymbolTypeCode, code_symbols); 1623 size_t num_code_symbols = code_symbols.GetSize(); 1624 1625 if (num_code_symbols > 0) 1626 { 1627 for (uint32_t i = 0; i < num_code_symbols; i++) 1628 { 1629 SymbolContext context; 1630 AddressRange addr_range; 1631 if (code_symbols.GetContextAtIndex(i, context)) 1632 { 1633 context.GetAddressRange (eSymbolContextEverything, 0, false, addr_range); 1634 addresses.push_back(addr_range.GetBaseAddress()); 1635 if (log) 1636 { 1637 addr_t load_addr = addr_range.GetBaseAddress().GetLoadAddress(target_sp.get()); 1638 1639 log->Printf ("Found a trampoline target symbol at 0x%" PRIx64 ".", load_addr); 1640 } 1641 } 1642 } 1643 } 1644 1645 SymbolContextList reexported_symbols; 1646 images.FindSymbolsWithNameAndType(trampoline_name, eSymbolTypeReExported, reexported_symbols); 1647 size_t num_reexported_symbols = reexported_symbols.GetSize(); 1648 if (num_reexported_symbols > 0) 1649 { 1650 for (uint32_t i = 0; i < num_reexported_symbols; i++) 1651 { 1652 SymbolContext context; 1653 if (reexported_symbols.GetContextAtIndex(i, context)) 1654 { 1655 if (context.symbol) 1656 { 1657 Symbol *actual_symbol = context.symbol->ResolveReExportedSymbol(*target_sp.get()); 1658 if (actual_symbol) 1659 { 1660 if (actual_symbol->GetAddress().IsValid()) 1661 { 1662 addresses.push_back(actual_symbol->GetAddress()); 1663 if (log) 1664 { 1665 lldb::addr_t load_addr = actual_symbol->GetAddress().GetLoadAddress(target_sp.get()); 1666 log->Printf ("Found a re-exported symbol: %s at 0x%" PRIx64 ".", 1667 actual_symbol->GetName().GetCString(), load_addr); 1668 } 1669 } 1670 } 1671 } 1672 } 1673 } 1674 } 1675 1676 SymbolContextList indirect_symbols; 1677 images.FindSymbolsWithNameAndType(trampoline_name, eSymbolTypeResolver, indirect_symbols); 1678 size_t num_indirect_symbols = indirect_symbols.GetSize(); 1679 if (num_indirect_symbols > 0) 1680 { 1681 for (uint32_t i = 0; i < num_indirect_symbols; i++) 1682 { 1683 SymbolContext context; 1684 AddressRange addr_range; 1685 if (indirect_symbols.GetContextAtIndex(i, context)) 1686 { 1687 context.GetAddressRange (eSymbolContextEverything, 0, false, addr_range); 1688 addresses.push_back(addr_range.GetBaseAddress()); 1689 if (log) 1690 { 1691 addr_t load_addr = addr_range.GetBaseAddress().GetLoadAddress(target_sp.get()); 1692 1693 log->Printf ("Found an indirect target symbol at 0x%" PRIx64 ".", load_addr); 1694 } 1695 } 1696 } 1697 } 1698 } 1699 } 1700 else if (current_symbol->GetType() == eSymbolTypeReExported) 1701 { 1702 // I am not sure we could ever end up stopped AT a re-exported symbol. But just in case: 1703 1704 const Symbol *actual_symbol = current_symbol->ResolveReExportedSymbol(*(target_sp.get())); 1705 if (actual_symbol) 1706 { 1707 Address target_addr(actual_symbol->GetAddress()); 1708 if (target_addr.IsValid()) 1709 { 1710 if (log) 1711 log->Printf ("Found a re-exported symbol: %s pointing to: %s at 0x%" PRIx64 ".", 1712 current_symbol->GetName().GetCString(), 1713 actual_symbol->GetName().GetCString(), 1714 target_addr.GetLoadAddress(target_sp.get())); 1715 addresses.push_back (target_addr.GetLoadAddress(target_sp.get())); 1716 1717 } 1718 } 1719 } 1720 1721 if (addresses.size() > 0) 1722 { 1723 // First check whether any of the addresses point to Indirect symbols, and if they do, resolve them: 1724 std::vector<lldb::addr_t> load_addrs; 1725 for (Address address : addresses) 1726 { 1727 Symbol *symbol = address.CalculateSymbolContextSymbol(); 1728 if (symbol && symbol->IsIndirect()) 1729 { 1730 Error error; 1731 addr_t resolved_addr = thread.GetProcess()->ResolveIndirectFunction(&symbol->GetAddress(), error); 1732 if (error.Success()) 1733 { 1734 load_addrs.push_back(resolved_addr); 1735 if (log) 1736 log->Printf("ResolveIndirectFunction found resolved target for %s at 0x%" PRIx64 ".", 1737 symbol->GetName().GetCString(), resolved_addr); 1738 } 1739 } 1740 else 1741 { 1742 load_addrs.push_back(address.GetLoadAddress(target_sp.get())); 1743 } 1744 1745 } 1746 thread_plan_sp.reset (new ThreadPlanRunToAddress (thread, load_addrs, stop_others)); 1747 } 1748 } 1749 else 1750 { 1751 if (log) 1752 log->Printf ("Could not find symbol for step through."); 1753 } 1754 1755 return thread_plan_sp; 1756 } 1757 1758 size_t 1759 DynamicLoaderMacOSXDYLD::FindEquivalentSymbols (lldb_private::Symbol *original_symbol, 1760 lldb_private::ModuleList &images, 1761 lldb_private::SymbolContextList &equivalent_symbols) 1762 { 1763 const ConstString &trampoline_name = original_symbol->GetMangled().GetName(Mangled::ePreferMangled); 1764 if (!trampoline_name) 1765 return 0; 1766 1767 size_t initial_size = equivalent_symbols.GetSize(); 1768 1769 static const char *resolver_name_regex = "(_gc|_non_gc|\\$[A-Za-z0-9\\$]+)$"; 1770 std::string equivalent_regex_buf("^"); 1771 equivalent_regex_buf.append (trampoline_name.GetCString()); 1772 equivalent_regex_buf.append (resolver_name_regex); 1773 1774 RegularExpression equivalent_name_regex (equivalent_regex_buf.c_str()); 1775 const bool append = true; 1776 images.FindSymbolsMatchingRegExAndType (equivalent_name_regex, eSymbolTypeCode, equivalent_symbols, append); 1777 1778 return equivalent_symbols.GetSize() - initial_size; 1779 } 1780 1781 Error 1782 DynamicLoaderMacOSXDYLD::CanLoadImage () 1783 { 1784 Error error; 1785 // In order for us to tell if we can load a shared library we verify that 1786 // the dylib_info_addr isn't zero (which means no shared libraries have 1787 // been set yet, or dyld is currently mucking with the shared library list). 1788 if (ReadAllImageInfosStructure ()) 1789 { 1790 // TODO: also check the _dyld_global_lock_held variable in libSystem.B.dylib? 1791 // TODO: check the malloc lock? 1792 // TODO: check the objective C lock? 1793 if (m_dyld_all_image_infos.dylib_info_addr != 0) 1794 return error; // Success 1795 } 1796 1797 error.SetErrorString("unsafe to load or unload shared libraries"); 1798 return error; 1799 } 1800 1801 void 1802 DynamicLoaderMacOSXDYLD::Initialize() 1803 { 1804 PluginManager::RegisterPlugin (GetPluginNameStatic(), 1805 GetPluginDescriptionStatic(), 1806 CreateInstance); 1807 } 1808 1809 void 1810 DynamicLoaderMacOSXDYLD::Terminate() 1811 { 1812 PluginManager::UnregisterPlugin (CreateInstance); 1813 } 1814 1815 1816 lldb_private::ConstString 1817 DynamicLoaderMacOSXDYLD::GetPluginNameStatic() 1818 { 1819 static ConstString g_name("macosx-dyld"); 1820 return g_name; 1821 } 1822 1823 const char * 1824 DynamicLoaderMacOSXDYLD::GetPluginDescriptionStatic() 1825 { 1826 return "Dynamic loader plug-in that watches for shared library loads/unloads in MacOSX user processes."; 1827 } 1828 1829 1830 //------------------------------------------------------------------ 1831 // PluginInterface protocol 1832 //------------------------------------------------------------------ 1833 lldb_private::ConstString 1834 DynamicLoaderMacOSXDYLD::GetPluginName() 1835 { 1836 return GetPluginNameStatic(); 1837 } 1838 1839 uint32_t 1840 DynamicLoaderMacOSXDYLD::GetPluginVersion() 1841 { 1842 return 1; 1843 } 1844 1845 uint32_t 1846 DynamicLoaderMacOSXDYLD::AddrByteSize() 1847 { 1848 switch (m_dyld.header.magic) 1849 { 1850 case llvm::MachO::MH_MAGIC: 1851 case llvm::MachO::MH_CIGAM: 1852 return 4; 1853 1854 case llvm::MachO::MH_MAGIC_64: 1855 case llvm::MachO::MH_CIGAM_64: 1856 return 8; 1857 1858 default: 1859 break; 1860 } 1861 return 0; 1862 } 1863 1864 lldb::ByteOrder 1865 DynamicLoaderMacOSXDYLD::GetByteOrderFromMagic (uint32_t magic) 1866 { 1867 switch (magic) 1868 { 1869 case llvm::MachO::MH_MAGIC: 1870 case llvm::MachO::MH_MAGIC_64: 1871 return lldb::endian::InlHostByteOrder(); 1872 1873 case llvm::MachO::MH_CIGAM: 1874 case llvm::MachO::MH_CIGAM_64: 1875 if (lldb::endian::InlHostByteOrder() == lldb::eByteOrderBig) 1876 return lldb::eByteOrderLittle; 1877 else 1878 return lldb::eByteOrderBig; 1879 1880 default: 1881 break; 1882 } 1883 return lldb::eByteOrderInvalid; 1884 } 1885 1886 lldb::ByteOrder 1887 DynamicLoaderMacOSXDYLD::DYLDImageInfo::GetByteOrder() 1888 { 1889 return DynamicLoaderMacOSXDYLD::GetByteOrderFromMagic(header.magic); 1890 } 1891 1892