1//===-- DynamicLoaderMacOSXDYLD.cpp ---------------------------------------===// 2// 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4// See https://llvm.org/LICENSE.txt for license information. 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6// 7//===----------------------------------------------------------------------===// 8 9#include "DynamicLoaderMacOSXDYLD.h" 10#include "DynamicLoaderDarwin.h" 11#include "DynamicLoaderMacOS.h" 12#include "Plugins/LanguageRuntime/ObjC/ObjCLanguageRuntime.h" 13#include "Plugins/TypeSystem/Clang/TypeSystemClang.h" 14#include "lldb/Breakpoint/StoppointCallbackContext.h" 15#include "lldb/Core/Debugger.h" 16#include "lldb/Core/Module.h" 17#include "lldb/Core/ModuleSpec.h" 18#include "lldb/Core/PluginManager.h" 19#include "lldb/Core/Section.h" 20#include "lldb/Symbol/Function.h" 21#include "lldb/Symbol/ObjectFile.h" 22#include "lldb/Target/ABI.h" 23#include "lldb/Target/RegisterContext.h" 24#include "lldb/Target/StackFrame.h" 25#include "lldb/Target/Target.h" 26#include "lldb/Target/Thread.h" 27#include "lldb/Target/ThreadPlanRunToAddress.h" 28#include "lldb/Utility/DataBuffer.h" 29#include "lldb/Utility/DataBufferHeap.h" 30#include "lldb/Utility/LLDBLog.h" 31#include "lldb/Utility/Log.h" 32#include "lldb/Utility/State.h" 33 34//#define ENABLE_DEBUG_PRINTF // COMMENT THIS LINE OUT PRIOR TO CHECKIN 35#ifdef ENABLE_DEBUG_PRINTF 36#include <cstdio> 37#define DEBUG_PRINTF(fmt, ...) printf(fmt, ##__VA_ARGS__) 38#else 39#define DEBUG_PRINTF(fmt, ...) 40#endif 41 42#ifndef __APPLE__ 43#include "Utility/UuidCompatibility.h" 44#else 45#include <uuid/uuid.h> 46#endif 47 48using namespace lldb; 49using namespace lldb_private; 50 51LLDB_PLUGIN_DEFINE(DynamicLoaderMacOSXDYLD) 52 53// Create an instance of this class. This function is filled into the plugin 54// info class that gets handed out by the plugin factory and allows the lldb to 55// instantiate an instance of this class. 56DynamicLoader *DynamicLoaderMacOSXDYLD::CreateInstance(Process *process, 57 bool force) { 58 bool create = force; 59 if (!create) { 60 create = true; 61 Module *exe_module = process->GetTarget().GetExecutableModulePointer(); 62 if (exe_module) { 63 ObjectFile *object_file = exe_module->GetObjectFile(); 64 if (object_file) { 65 create = (object_file->GetStrata() == ObjectFile::eStrataUser); 66 } 67 } 68 69 if (create) { 70 const llvm::Triple &triple_ref = 71 process->GetTarget().GetArchitecture().GetTriple(); 72 switch (triple_ref.getOS()) { 73 case llvm::Triple::Darwin: 74 case llvm::Triple::MacOSX: 75 case llvm::Triple::IOS: 76 case llvm::Triple::TvOS: 77 case llvm::Triple::WatchOS: 78 // NEED_BRIDGEOS_TRIPLE case llvm::Triple::BridgeOS: 79 create = triple_ref.getVendor() == llvm::Triple::Apple; 80 break; 81 default: 82 create = false; 83 break; 84 } 85 } 86 } 87 88 if (UseDYLDSPI(process)) { 89 create = false; 90 } 91 92 if (create) 93 return new DynamicLoaderMacOSXDYLD(process); 94 return nullptr; 95} 96 97// Constructor 98DynamicLoaderMacOSXDYLD::DynamicLoaderMacOSXDYLD(Process *process) 99 : DynamicLoaderDarwin(process), 100 m_dyld_all_image_infos_addr(LLDB_INVALID_ADDRESS), 101 m_dyld_all_image_infos(), m_dyld_all_image_infos_stop_id(UINT32_MAX), 102 m_break_id(LLDB_INVALID_BREAK_ID), m_mutex(), 103 m_process_image_addr_is_all_images_infos(false) {} 104 105// Destructor 106DynamicLoaderMacOSXDYLD::~DynamicLoaderMacOSXDYLD() { 107 if (LLDB_BREAK_ID_IS_VALID(m_break_id)) 108 m_process->GetTarget().RemoveBreakpointByID(m_break_id); 109} 110 111bool DynamicLoaderMacOSXDYLD::ProcessDidExec() { 112 std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); 113 bool did_exec = false; 114 if (m_process) { 115 // If we are stopped after an exec, we will have only one thread... 116 if (m_process->GetThreadList().GetSize() == 1) { 117 // We know if a process has exec'ed if our "m_dyld_all_image_infos_addr" 118 // value differs from the Process' image info address. When a process 119 // execs itself it might cause a change if ASLR is enabled. 120 const addr_t shlib_addr = m_process->GetImageInfoAddress(); 121 if (m_process_image_addr_is_all_images_infos && 122 shlib_addr != m_dyld_all_image_infos_addr) { 123 // The image info address from the process is the 124 // 'dyld_all_image_infos' address and it has changed. 125 did_exec = true; 126 } else if (!m_process_image_addr_is_all_images_infos && 127 shlib_addr == m_dyld.address) { 128 // The image info address from the process is the mach_header address 129 // for dyld and it has changed. 130 did_exec = true; 131 } else { 132 // ASLR might be disabled and dyld could have ended up in the same 133 // location. We should try and detect if we are stopped at 134 // '_dyld_start' 135 ThreadSP thread_sp(m_process->GetThreadList().GetThreadAtIndex(0)); 136 if (thread_sp) { 137 lldb::StackFrameSP frame_sp(thread_sp->GetStackFrameAtIndex(0)); 138 if (frame_sp) { 139 const Symbol *symbol = 140 frame_sp->GetSymbolContext(eSymbolContextSymbol).symbol; 141 if (symbol) { 142 if (symbol->GetName() == "_dyld_start") 143 did_exec = true; 144 } 145 } 146 } 147 } 148 149 if (did_exec) { 150 m_libpthread_module_wp.reset(); 151 m_pthread_getspecific_addr.Clear(); 152 } 153 } 154 } 155 return did_exec; 156} 157 158// Clear out the state of this class. 159void DynamicLoaderMacOSXDYLD::DoClear() { 160 std::lock_guard<std::recursive_mutex> guard(m_mutex); 161 162 if (LLDB_BREAK_ID_IS_VALID(m_break_id)) 163 m_process->GetTarget().RemoveBreakpointByID(m_break_id); 164 165 m_dyld_all_image_infos_addr = LLDB_INVALID_ADDRESS; 166 m_dyld_all_image_infos.Clear(); 167 m_break_id = LLDB_INVALID_BREAK_ID; 168} 169 170// Check if we have found DYLD yet 171bool DynamicLoaderMacOSXDYLD::DidSetNotificationBreakpoint() { 172 return LLDB_BREAK_ID_IS_VALID(m_break_id); 173} 174 175void DynamicLoaderMacOSXDYLD::ClearNotificationBreakpoint() { 176 if (LLDB_BREAK_ID_IS_VALID(m_break_id)) { 177 m_process->GetTarget().RemoveBreakpointByID(m_break_id); 178 } 179} 180 181// Try and figure out where dyld is by first asking the Process if it knows 182// (which currently calls down in the lldb::Process to get the DYLD info 183// (available on SnowLeopard only). If that fails, then check in the default 184// addresses. 185void DynamicLoaderMacOSXDYLD::DoInitialImageFetch() { 186 if (m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS) { 187 // Check the image info addr as it might point to the mach header for dyld, 188 // or it might point to the dyld_all_image_infos struct 189 const addr_t shlib_addr = m_process->GetImageInfoAddress(); 190 if (shlib_addr != LLDB_INVALID_ADDRESS) { 191 ByteOrder byte_order = 192 m_process->GetTarget().GetArchitecture().GetByteOrder(); 193 uint8_t buf[4]; 194 DataExtractor data(buf, sizeof(buf), byte_order, 4); 195 Status error; 196 if (m_process->ReadMemory(shlib_addr, buf, 4, error) == 4) { 197 lldb::offset_t offset = 0; 198 uint32_t magic = data.GetU32(&offset); 199 switch (magic) { 200 case llvm::MachO::MH_MAGIC: 201 case llvm::MachO::MH_MAGIC_64: 202 case llvm::MachO::MH_CIGAM: 203 case llvm::MachO::MH_CIGAM_64: 204 m_process_image_addr_is_all_images_infos = false; 205 ReadDYLDInfoFromMemoryAndSetNotificationCallback(shlib_addr); 206 return; 207 208 default: 209 break; 210 } 211 } 212 // Maybe it points to the all image infos? 213 m_dyld_all_image_infos_addr = shlib_addr; 214 m_process_image_addr_is_all_images_infos = true; 215 } 216 } 217 218 if (m_dyld_all_image_infos_addr != LLDB_INVALID_ADDRESS) { 219 if (ReadAllImageInfosStructure()) { 220 if (m_dyld_all_image_infos.dyldImageLoadAddress != LLDB_INVALID_ADDRESS) 221 ReadDYLDInfoFromMemoryAndSetNotificationCallback( 222 m_dyld_all_image_infos.dyldImageLoadAddress); 223 else 224 ReadDYLDInfoFromMemoryAndSetNotificationCallback( 225 m_dyld_all_image_infos_addr & 0xfffffffffff00000ull); 226 return; 227 } 228 } 229 230 // Check some default values 231 Module *executable = m_process->GetTarget().GetExecutableModulePointer(); 232 233 if (executable) { 234 const ArchSpec &exe_arch = executable->GetArchitecture(); 235 if (exe_arch.GetAddressByteSize() == 8) { 236 ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x7fff5fc00000ull); 237 } else if (exe_arch.GetMachine() == llvm::Triple::arm || 238 exe_arch.GetMachine() == llvm::Triple::thumb || 239 exe_arch.GetMachine() == llvm::Triple::aarch64 || 240 exe_arch.GetMachine() == llvm::Triple::aarch64_32) { 241 ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x2fe00000); 242 } else { 243 ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x8fe00000); 244 } 245 } 246} 247 248// Assume that dyld is in memory at ADDR and try to parse it's load commands 249bool DynamicLoaderMacOSXDYLD::ReadDYLDInfoFromMemoryAndSetNotificationCallback( 250 lldb::addr_t addr) { 251 std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); 252 DataExtractor data; // Load command data 253 static ConstString g_dyld_all_image_infos("dyld_all_image_infos"); 254 static ConstString g_new_dyld_all_image_infos("dyld4::dyld_all_image_infos"); 255 if (ReadMachHeader(addr, &m_dyld.header, &data)) { 256 if (m_dyld.header.filetype == llvm::MachO::MH_DYLINKER) { 257 m_dyld.address = addr; 258 ModuleSP dyld_module_sp; 259 if (ParseLoadCommands(data, m_dyld, &m_dyld.file_spec)) { 260 if (m_dyld.file_spec) { 261 UpdateDYLDImageInfoFromNewImageInfo(m_dyld); 262 } 263 } 264 dyld_module_sp = GetDYLDModule(); 265 266 Target &target = m_process->GetTarget(); 267 268 if (m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS && 269 dyld_module_sp.get()) { 270 const Symbol *symbol = dyld_module_sp->FindFirstSymbolWithNameAndType( 271 g_dyld_all_image_infos, eSymbolTypeData); 272 if (!symbol) { 273 symbol = dyld_module_sp->FindFirstSymbolWithNameAndType( 274 g_new_dyld_all_image_infos, eSymbolTypeData); 275 } 276 if (symbol) 277 m_dyld_all_image_infos_addr = symbol->GetLoadAddress(&target); 278 } 279 280 if (m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS) { 281 ConstString g_sect_name("__all_image_info"); 282 SectionSP dyld_aii_section_sp = 283 dyld_module_sp->GetSectionList()->FindSectionByName(g_sect_name); 284 if (dyld_aii_section_sp) { 285 Address dyld_aii_addr(dyld_aii_section_sp, 0); 286 m_dyld_all_image_infos_addr = dyld_aii_addr.GetLoadAddress(&target); 287 } 288 } 289 290 // Update all image infos 291 InitializeFromAllImageInfos(); 292 293 // If we didn't have an executable before, but now we do, then the dyld 294 // module shared pointer might be unique and we may need to add it again 295 // (since Target::SetExecutableModule() will clear the images). So append 296 // the dyld module back to the list if it is 297 /// unique! 298 if (dyld_module_sp) { 299 target.GetImages().AppendIfNeeded(dyld_module_sp); 300 301 // At this point we should have read in dyld's module, and so we should 302 // set breakpoints in it: 303 ModuleList modules; 304 modules.Append(dyld_module_sp); 305 target.ModulesDidLoad(modules); 306 SetDYLDModule(dyld_module_sp); 307 } 308 309 return true; 310 } 311 } 312 return false; 313} 314 315bool DynamicLoaderMacOSXDYLD::NeedToDoInitialImageFetch() { 316 return m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS; 317} 318 319// Static callback function that gets called when our DYLD notification 320// breakpoint gets hit. We update all of our image infos and then let our super 321// class DynamicLoader class decide if we should stop or not (based on global 322// preference). 323bool DynamicLoaderMacOSXDYLD::NotifyBreakpointHit( 324 void *baton, StoppointCallbackContext *context, lldb::user_id_t break_id, 325 lldb::user_id_t break_loc_id) { 326 // Let the event know that the images have changed 327 // DYLD passes three arguments to the notification breakpoint. 328 // Arg1: enum dyld_image_mode mode - 0 = adding, 1 = removing Arg2: uint32_t 329 // infoCount - Number of shared libraries added Arg3: dyld_image_info 330 // info[] - Array of structs of the form: 331 // const struct mach_header 332 // *imageLoadAddress 333 // const char *imageFilePath 334 // uintptr_t imageFileModDate (a time_t) 335 336 DynamicLoaderMacOSXDYLD *dyld_instance = (DynamicLoaderMacOSXDYLD *)baton; 337 338 // First step is to see if we've already initialized the all image infos. If 339 // we haven't then this function will do so and return true. In the course 340 // of initializing the all_image_infos it will read the complete current 341 // state, so we don't need to figure out what has changed from the data 342 // passed in to us. 343 344 ExecutionContext exe_ctx(context->exe_ctx_ref); 345 Process *process = exe_ctx.GetProcessPtr(); 346 347 // This is a sanity check just in case this dyld_instance is an old dyld 348 // plugin's breakpoint still lying around. 349 if (process != dyld_instance->m_process) 350 return false; 351 352 if (dyld_instance->InitializeFromAllImageInfos()) 353 return dyld_instance->GetStopWhenImagesChange(); 354 355 const lldb::ABISP &abi = process->GetABI(); 356 if (abi) { 357 // Build up the value array to store the three arguments given above, then 358 // get the values from the ABI: 359 360 TypeSystemClangSP scratch_ts_sp = 361 ScratchTypeSystemClang::GetForTarget(process->GetTarget()); 362 if (!scratch_ts_sp) 363 return false; 364 365 ValueList argument_values; 366 Value input_value; 367 368 CompilerType clang_void_ptr_type = 369 scratch_ts_sp->GetBasicType(eBasicTypeVoid).GetPointerType(); 370 CompilerType clang_uint32_type = 371 scratch_ts_sp->GetBuiltinTypeForEncodingAndBitSize(lldb::eEncodingUint, 372 32); 373 input_value.SetValueType(Value::ValueType::Scalar); 374 input_value.SetCompilerType(clang_uint32_type); 375 // input_value.SetContext (Value::eContextTypeClangType, 376 // clang_uint32_type); 377 argument_values.PushValue(input_value); 378 argument_values.PushValue(input_value); 379 input_value.SetCompilerType(clang_void_ptr_type); 380 // input_value.SetContext (Value::eContextTypeClangType, 381 // clang_void_ptr_type); 382 argument_values.PushValue(input_value); 383 384 if (abi->GetArgumentValues(exe_ctx.GetThreadRef(), argument_values)) { 385 uint32_t dyld_mode = 386 argument_values.GetValueAtIndex(0)->GetScalar().UInt(-1); 387 if (dyld_mode != static_cast<uint32_t>(-1)) { 388 // Okay the mode was right, now get the number of elements, and the 389 // array of new elements... 390 uint32_t image_infos_count = 391 argument_values.GetValueAtIndex(1)->GetScalar().UInt(-1); 392 if (image_infos_count != static_cast<uint32_t>(-1)) { 393 // Got the number added, now go through the array of added elements, 394 // putting out the mach header address, and adding the image. Note, 395 // I'm not putting in logging here, since the AddModules & 396 // RemoveModules functions do all the logging internally. 397 398 lldb::addr_t image_infos_addr = 399 argument_values.GetValueAtIndex(2)->GetScalar().ULongLong(); 400 if (dyld_mode == 0) { 401 // This is add: 402 dyld_instance->AddModulesUsingImageInfosAddress(image_infos_addr, 403 image_infos_count); 404 } else { 405 // This is remove: 406 dyld_instance->RemoveModulesUsingImageInfosAddress( 407 image_infos_addr, image_infos_count); 408 } 409 } 410 } 411 } 412 } else { 413 Target &target = process->GetTarget(); 414 Debugger::ReportWarning( 415 "no ABI plugin located for triple " + 416 target.GetArchitecture().GetTriple().getTriple() + 417 ": shared libraries will not be registered", 418 target.GetDebugger().GetID()); 419 } 420 421 // Return true to stop the target, false to just let the target run 422 return dyld_instance->GetStopWhenImagesChange(); 423} 424 425bool DynamicLoaderMacOSXDYLD::ReadAllImageInfosStructure() { 426 std::lock_guard<std::recursive_mutex> guard(m_mutex); 427 428 // the all image infos is already valid for this process stop ID 429 if (m_process->GetStopID() == m_dyld_all_image_infos_stop_id) 430 return true; 431 432 m_dyld_all_image_infos.Clear(); 433 if (m_dyld_all_image_infos_addr != LLDB_INVALID_ADDRESS) { 434 ByteOrder byte_order = 435 m_process->GetTarget().GetArchitecture().GetByteOrder(); 436 uint32_t addr_size = 437 m_process->GetTarget().GetArchitecture().GetAddressByteSize(); 438 439 uint8_t buf[256]; 440 DataExtractor data(buf, sizeof(buf), byte_order, addr_size); 441 lldb::offset_t offset = 0; 442 443 const size_t count_v2 = sizeof(uint32_t) + // version 444 sizeof(uint32_t) + // infoArrayCount 445 addr_size + // infoArray 446 addr_size + // notification 447 addr_size + // processDetachedFromSharedRegion + 448 // libSystemInitialized + pad 449 addr_size; // dyldImageLoadAddress 450 const size_t count_v11 = count_v2 + addr_size + // jitInfo 451 addr_size + // dyldVersion 452 addr_size + // errorMessage 453 addr_size + // terminationFlags 454 addr_size + // coreSymbolicationShmPage 455 addr_size + // systemOrderFlag 456 addr_size + // uuidArrayCount 457 addr_size + // uuidArray 458 addr_size + // dyldAllImageInfosAddress 459 addr_size + // initialImageCount 460 addr_size + // errorKind 461 addr_size + // errorClientOfDylibPath 462 addr_size + // errorTargetDylibPath 463 addr_size; // errorSymbol 464 const size_t count_v13 = count_v11 + addr_size + // sharedCacheSlide 465 sizeof(uuid_t); // sharedCacheUUID 466 UNUSED_IF_ASSERT_DISABLED(count_v13); 467 assert(sizeof(buf) >= count_v13); 468 469 Status error; 470 if (m_process->ReadMemory(m_dyld_all_image_infos_addr, buf, 4, error) == 471 4) { 472 m_dyld_all_image_infos.version = data.GetU32(&offset); 473 // If anything in the high byte is set, we probably got the byte order 474 // incorrect (the process might not have it set correctly yet due to 475 // attaching to a program without a specified file). 476 if (m_dyld_all_image_infos.version & 0xff000000) { 477 // We have guessed the wrong byte order. Swap it and try reading the 478 // version again. 479 if (byte_order == eByteOrderLittle) 480 byte_order = eByteOrderBig; 481 else 482 byte_order = eByteOrderLittle; 483 484 data.SetByteOrder(byte_order); 485 offset = 0; 486 m_dyld_all_image_infos.version = data.GetU32(&offset); 487 } 488 } else { 489 return false; 490 } 491 492 const size_t count = 493 (m_dyld_all_image_infos.version >= 11) ? count_v11 : count_v2; 494 495 const size_t bytes_read = 496 m_process->ReadMemory(m_dyld_all_image_infos_addr, buf, count, error); 497 if (bytes_read == count) { 498 offset = 0; 499 m_dyld_all_image_infos.version = data.GetU32(&offset); 500 m_dyld_all_image_infos.dylib_info_count = data.GetU32(&offset); 501 m_dyld_all_image_infos.dylib_info_addr = data.GetAddress(&offset); 502 m_dyld_all_image_infos.notification = data.GetAddress(&offset); 503 m_dyld_all_image_infos.processDetachedFromSharedRegion = 504 data.GetU8(&offset); 505 m_dyld_all_image_infos.libSystemInitialized = data.GetU8(&offset); 506 // Adjust for padding. 507 offset += addr_size - 2; 508 m_dyld_all_image_infos.dyldImageLoadAddress = data.GetAddress(&offset); 509 if (m_dyld_all_image_infos.version >= 11) { 510 offset += addr_size * 8; 511 uint64_t dyld_all_image_infos_addr = data.GetAddress(&offset); 512 513 // When we started, we were given the actual address of the 514 // all_image_infos struct (probably via TASK_DYLD_INFO) in memory - 515 // this address is stored in m_dyld_all_image_infos_addr and is the 516 // most accurate address we have. 517 518 // We read the dyld_all_image_infos struct from memory; it contains its 519 // own address. If the address in the struct does not match the actual 520 // address, the dyld we're looking at has been loaded at a different 521 // location (slid) from where it intended to load. The addresses in 522 // the dyld_all_image_infos struct are the original, non-slid 523 // addresses, and need to be adjusted. Most importantly the address of 524 // dyld and the notification address need to be adjusted. 525 526 if (dyld_all_image_infos_addr != m_dyld_all_image_infos_addr) { 527 uint64_t image_infos_offset = 528 dyld_all_image_infos_addr - 529 m_dyld_all_image_infos.dyldImageLoadAddress; 530 uint64_t notification_offset = 531 m_dyld_all_image_infos.notification - 532 m_dyld_all_image_infos.dyldImageLoadAddress; 533 m_dyld_all_image_infos.dyldImageLoadAddress = 534 m_dyld_all_image_infos_addr - image_infos_offset; 535 m_dyld_all_image_infos.notification = 536 m_dyld_all_image_infos.dyldImageLoadAddress + notification_offset; 537 } 538 } 539 m_dyld_all_image_infos_stop_id = m_process->GetStopID(); 540 return true; 541 } 542 } 543 return false; 544} 545 546bool DynamicLoaderMacOSXDYLD::AddModulesUsingImageInfosAddress( 547 lldb::addr_t image_infos_addr, uint32_t image_infos_count) { 548 ImageInfo::collection image_infos; 549 Log *log = GetLog(LLDBLog::DynamicLoader); 550 LLDB_LOGF(log, "Adding %d modules.\n", image_infos_count); 551 552 std::lock_guard<std::recursive_mutex> guard(m_mutex); 553 std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); 554 if (m_process->GetStopID() == m_dyld_image_infos_stop_id) 555 return true; 556 557 StructuredData::ObjectSP image_infos_json_sp = 558 m_process->GetLoadedDynamicLibrariesInfos(image_infos_addr, 559 image_infos_count); 560 if (image_infos_json_sp.get() && image_infos_json_sp->GetAsDictionary() && 561 image_infos_json_sp->GetAsDictionary()->HasKey("images") && 562 image_infos_json_sp->GetAsDictionary() 563 ->GetValueForKey("images") 564 ->GetAsArray() && 565 image_infos_json_sp->GetAsDictionary() 566 ->GetValueForKey("images") 567 ->GetAsArray() 568 ->GetSize() == image_infos_count) { 569 bool return_value = false; 570 if (JSONImageInformationIntoImageInfo(image_infos_json_sp, image_infos)) { 571 UpdateSpecialBinariesFromNewImageInfos(image_infos); 572 return_value = AddModulesUsingImageInfos(image_infos); 573 } 574 m_dyld_image_infos_stop_id = m_process->GetStopID(); 575 return return_value; 576 } 577 578 if (!ReadImageInfos(image_infos_addr, image_infos_count, image_infos)) 579 return false; 580 581 UpdateImageInfosHeaderAndLoadCommands(image_infos, image_infos_count, false); 582 bool return_value = AddModulesUsingImageInfos(image_infos); 583 m_dyld_image_infos_stop_id = m_process->GetStopID(); 584 return return_value; 585} 586 587bool DynamicLoaderMacOSXDYLD::RemoveModulesUsingImageInfosAddress( 588 lldb::addr_t image_infos_addr, uint32_t image_infos_count) { 589 ImageInfo::collection image_infos; 590 Log *log = GetLog(LLDBLog::DynamicLoader); 591 592 std::lock_guard<std::recursive_mutex> guard(m_mutex); 593 std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); 594 if (m_process->GetStopID() == m_dyld_image_infos_stop_id) 595 return true; 596 597 // First read in the image_infos for the removed modules, and their headers & 598 // load commands. 599 if (!ReadImageInfos(image_infos_addr, image_infos_count, image_infos)) { 600 if (log) 601 log->PutCString("Failed reading image infos array."); 602 return false; 603 } 604 605 LLDB_LOGF(log, "Removing %d modules.", image_infos_count); 606 607 ModuleList unloaded_module_list; 608 for (uint32_t idx = 0; idx < image_infos.size(); ++idx) { 609 if (log) { 610 LLDB_LOGF(log, "Removing module at address=0x%16.16" PRIx64 ".", 611 image_infos[idx].address); 612 image_infos[idx].PutToLog(log); 613 } 614 615 // Remove this image_infos from the m_all_image_infos. We do the 616 // comparison by address rather than by file spec because we can have many 617 // modules with the same "file spec" in the case that they are modules 618 // loaded from memory. 619 // 620 // Also copy over the uuid from the old entry to the removed entry so we 621 // can use it to lookup the module in the module list. 622 623 bool found = false; 624 625 for (ImageInfo::collection::iterator pos = m_dyld_image_infos.begin(); 626 pos != m_dyld_image_infos.end(); pos++) { 627 if (image_infos[idx].address == (*pos).address) { 628 image_infos[idx].uuid = (*pos).uuid; 629 630 // Add the module from this image_info to the "unloaded_module_list". 631 // We'll remove them all at one go later on. 632 633 ModuleSP unload_image_module_sp( 634 FindTargetModuleForImageInfo(image_infos[idx], false, nullptr)); 635 if (unload_image_module_sp.get()) { 636 // When we unload, be sure to use the image info from the old list, 637 // since that has sections correctly filled in. 638 UnloadModuleSections(unload_image_module_sp.get(), *pos); 639 unloaded_module_list.AppendIfNeeded(unload_image_module_sp); 640 } else { 641 if (log) { 642 LLDB_LOGF(log, "Could not find module for unloading info entry:"); 643 image_infos[idx].PutToLog(log); 644 } 645 } 646 647 // Then remove it from the m_dyld_image_infos: 648 649 m_dyld_image_infos.erase(pos); 650 found = true; 651 break; 652 } 653 } 654 655 if (!found) { 656 if (log) { 657 LLDB_LOGF(log, "Could not find image_info entry for unloading image:"); 658 image_infos[idx].PutToLog(log); 659 } 660 } 661 } 662 if (unloaded_module_list.GetSize() > 0) { 663 if (log) { 664 log->PutCString("Unloaded:"); 665 unloaded_module_list.LogUUIDAndPaths( 666 log, "DynamicLoaderMacOSXDYLD::ModulesDidUnload"); 667 } 668 m_process->GetTarget().GetImages().Remove(unloaded_module_list); 669 } 670 m_dyld_image_infos_stop_id = m_process->GetStopID(); 671 return true; 672} 673 674bool DynamicLoaderMacOSXDYLD::ReadImageInfos( 675 lldb::addr_t image_infos_addr, uint32_t image_infos_count, 676 ImageInfo::collection &image_infos) { 677 std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); 678 const ByteOrder endian = GetByteOrderFromMagic(m_dyld.header.magic); 679 const uint32_t addr_size = m_dyld.GetAddressByteSize(); 680 681 image_infos.resize(image_infos_count); 682 const size_t count = image_infos.size() * 3 * addr_size; 683 DataBufferHeap info_data(count, 0); 684 Status error; 685 const size_t bytes_read = m_process->ReadMemory( 686 image_infos_addr, info_data.GetBytes(), info_data.GetByteSize(), error); 687 if (bytes_read == count) { 688 lldb::offset_t info_data_offset = 0; 689 DataExtractor info_data_ref(info_data.GetBytes(), info_data.GetByteSize(), 690 endian, addr_size); 691 for (size_t i = 0; 692 i < image_infos.size() && info_data_ref.ValidOffset(info_data_offset); 693 i++) { 694 image_infos[i].address = info_data_ref.GetAddress(&info_data_offset); 695 lldb::addr_t path_addr = info_data_ref.GetAddress(&info_data_offset); 696 image_infos[i].mod_date = info_data_ref.GetAddress(&info_data_offset); 697 698 char raw_path[PATH_MAX]; 699 m_process->ReadCStringFromMemory(path_addr, raw_path, sizeof(raw_path), 700 error); 701 // don't resolve the path 702 if (error.Success()) { 703 image_infos[i].file_spec.SetFile(raw_path, FileSpec::Style::native); 704 } 705 } 706 return true; 707 } else { 708 return false; 709 } 710} 711 712// If we have found where the "_dyld_all_image_infos" lives in memory, read the 713// current info from it, and then update all image load addresses (or lack 714// thereof). Only do this if this is the first time we're reading the dyld 715// infos. Return true if we actually read anything, and false otherwise. 716bool DynamicLoaderMacOSXDYLD::InitializeFromAllImageInfos() { 717 Log *log = GetLog(LLDBLog::DynamicLoader); 718 719 std::lock_guard<std::recursive_mutex> guard(m_mutex); 720 std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); 721 if (m_process->GetStopID() == m_dyld_image_infos_stop_id || 722 m_dyld_image_infos.size() != 0) 723 return false; 724 725 if (ReadAllImageInfosStructure()) { 726 // Nothing to load or unload? 727 if (m_dyld_all_image_infos.dylib_info_count == 0) 728 return true; 729 730 if (m_dyld_all_image_infos.dylib_info_addr == 0) { 731 // DYLD is updating the images now. So we should say we have no images, 732 // and then we'll 733 // figure it out when we hit the added breakpoint. 734 return false; 735 } else { 736 if (!AddModulesUsingImageInfosAddress( 737 m_dyld_all_image_infos.dylib_info_addr, 738 m_dyld_all_image_infos.dylib_info_count)) { 739 DEBUG_PRINTF("%s", "unable to read all data for all_dylib_infos."); 740 m_dyld_image_infos.clear(); 741 } 742 } 743 744 // Now we have one more bit of business. If there is a library left in the 745 // images for our target that doesn't have a load address, then it must be 746 // something that we were expecting to load (for instance we read a load 747 // command for it) but it didn't in fact load - probably because 748 // DYLD_*_PATH pointed to an equivalent version. We don't want it to stay 749 // in the target's module list or it will confuse us, so unload it here. 750 Target &target = m_process->GetTarget(); 751 ModuleList not_loaded_modules; 752 for (ModuleSP module_sp : target.GetImages().Modules()) { 753 if (!module_sp->IsLoadedInTarget(&target)) { 754 if (log) { 755 StreamString s; 756 module_sp->GetDescription(s.AsRawOstream()); 757 LLDB_LOGF(log, "Unloading pre-run module: %s.", s.GetData()); 758 } 759 not_loaded_modules.Append(module_sp); 760 } 761 } 762 763 if (not_loaded_modules.GetSize() != 0) { 764 target.GetImages().Remove(not_loaded_modules); 765 } 766 767 return true; 768 } else 769 return false; 770} 771 772// Read a mach_header at ADDR into HEADER, and also fill in the load command 773// data into LOAD_COMMAND_DATA if it is non-NULL. 774// 775// Returns true if we succeed, false if we fail for any reason. 776bool DynamicLoaderMacOSXDYLD::ReadMachHeader(lldb::addr_t addr, 777 llvm::MachO::mach_header *header, 778 DataExtractor *load_command_data) { 779 DataBufferHeap header_bytes(sizeof(llvm::MachO::mach_header), 0); 780 Status error; 781 size_t bytes_read = m_process->ReadMemory(addr, header_bytes.GetBytes(), 782 header_bytes.GetByteSize(), error); 783 if (bytes_read == sizeof(llvm::MachO::mach_header)) { 784 lldb::offset_t offset = 0; 785 ::memset(header, 0, sizeof(llvm::MachO::mach_header)); 786 787 // Get the magic byte unswapped so we can figure out what we are dealing 788 // with 789 DataExtractor data(header_bytes.GetBytes(), header_bytes.GetByteSize(), 790 endian::InlHostByteOrder(), 4); 791 header->magic = data.GetU32(&offset); 792 lldb::addr_t load_cmd_addr = addr; 793 data.SetByteOrder( 794 DynamicLoaderMacOSXDYLD::GetByteOrderFromMagic(header->magic)); 795 switch (header->magic) { 796 case llvm::MachO::MH_MAGIC: 797 case llvm::MachO::MH_CIGAM: 798 data.SetAddressByteSize(4); 799 load_cmd_addr += sizeof(llvm::MachO::mach_header); 800 break; 801 802 case llvm::MachO::MH_MAGIC_64: 803 case llvm::MachO::MH_CIGAM_64: 804 data.SetAddressByteSize(8); 805 load_cmd_addr += sizeof(llvm::MachO::mach_header_64); 806 break; 807 808 default: 809 return false; 810 } 811 812 // Read the rest of dyld's mach header 813 if (data.GetU32(&offset, &header->cputype, 814 (sizeof(llvm::MachO::mach_header) / sizeof(uint32_t)) - 815 1)) { 816 if (load_command_data == nullptr) 817 return true; // We were able to read the mach_header and weren't asked 818 // to read the load command bytes 819 820 WritableDataBufferSP load_cmd_data_sp( 821 new DataBufferHeap(header->sizeofcmds, 0)); 822 823 size_t load_cmd_bytes_read = 824 m_process->ReadMemory(load_cmd_addr, load_cmd_data_sp->GetBytes(), 825 load_cmd_data_sp->GetByteSize(), error); 826 827 if (load_cmd_bytes_read == header->sizeofcmds) { 828 // Set the load command data and also set the correct endian swap 829 // settings and the correct address size 830 load_command_data->SetData(load_cmd_data_sp, 0, header->sizeofcmds); 831 load_command_data->SetByteOrder(data.GetByteOrder()); 832 load_command_data->SetAddressByteSize(data.GetAddressByteSize()); 833 return true; // We successfully read the mach_header and the load 834 // command data 835 } 836 837 return false; // We weren't able to read the load command data 838 } 839 } 840 return false; // We failed the read the mach_header 841} 842 843// Parse the load commands for an image 844uint32_t DynamicLoaderMacOSXDYLD::ParseLoadCommands(const DataExtractor &data, 845 ImageInfo &dylib_info, 846 FileSpec *lc_id_dylinker) { 847 lldb::offset_t offset = 0; 848 uint32_t cmd_idx; 849 Segment segment; 850 dylib_info.Clear(true); 851 852 for (cmd_idx = 0; cmd_idx < dylib_info.header.ncmds; cmd_idx++) { 853 // Clear out any load command specific data from DYLIB_INFO since we are 854 // about to read it. 855 856 if (data.ValidOffsetForDataOfSize(offset, 857 sizeof(llvm::MachO::load_command))) { 858 llvm::MachO::load_command load_cmd; 859 lldb::offset_t load_cmd_offset = offset; 860 load_cmd.cmd = data.GetU32(&offset); 861 load_cmd.cmdsize = data.GetU32(&offset); 862 switch (load_cmd.cmd) { 863 case llvm::MachO::LC_SEGMENT: { 864 segment.name.SetTrimmedCStringWithLength( 865 (const char *)data.GetData(&offset, 16), 16); 866 // We are putting 4 uint32_t values 4 uint64_t values so we have to use 867 // multiple 32 bit gets below. 868 segment.vmaddr = data.GetU32(&offset); 869 segment.vmsize = data.GetU32(&offset); 870 segment.fileoff = data.GetU32(&offset); 871 segment.filesize = data.GetU32(&offset); 872 // Extract maxprot, initprot, nsects and flags all at once 873 data.GetU32(&offset, &segment.maxprot, 4); 874 dylib_info.segments.push_back(segment); 875 } break; 876 877 case llvm::MachO::LC_SEGMENT_64: { 878 segment.name.SetTrimmedCStringWithLength( 879 (const char *)data.GetData(&offset, 16), 16); 880 // Extract vmaddr, vmsize, fileoff, and filesize all at once 881 data.GetU64(&offset, &segment.vmaddr, 4); 882 // Extract maxprot, initprot, nsects and flags all at once 883 data.GetU32(&offset, &segment.maxprot, 4); 884 dylib_info.segments.push_back(segment); 885 } break; 886 887 case llvm::MachO::LC_ID_DYLINKER: 888 if (lc_id_dylinker) { 889 const lldb::offset_t name_offset = 890 load_cmd_offset + data.GetU32(&offset); 891 const char *path = data.PeekCStr(name_offset); 892 lc_id_dylinker->SetFile(path, FileSpec::Style::native); 893 FileSystem::Instance().Resolve(*lc_id_dylinker); 894 } 895 break; 896 897 case llvm::MachO::LC_UUID: 898 dylib_info.uuid = UUID(data.GetData(&offset, 16), 16); 899 break; 900 901 default: 902 break; 903 } 904 // Set offset to be the beginning of the next load command. 905 offset = load_cmd_offset + load_cmd.cmdsize; 906 } 907 } 908 909 // All sections listed in the dyld image info structure will all either be 910 // fixed up already, or they will all be off by a single slide amount that is 911 // determined by finding the first segment that is at file offset zero which 912 // also has bytes (a file size that is greater than zero) in the object file. 913 914 // Determine the slide amount (if any) 915 const size_t num_sections = dylib_info.segments.size(); 916 for (size_t i = 0; i < num_sections; ++i) { 917 // Iterate through the object file sections to find the first section that 918 // starts of file offset zero and that has bytes in the file... 919 if ((dylib_info.segments[i].fileoff == 0 && 920 dylib_info.segments[i].filesize > 0) || 921 (dylib_info.segments[i].name == "__TEXT")) { 922 dylib_info.slide = dylib_info.address - dylib_info.segments[i].vmaddr; 923 // We have found the slide amount, so we can exit this for loop. 924 break; 925 } 926 } 927 return cmd_idx; 928} 929 930// Read the mach_header and load commands for each image that the 931// _dyld_all_image_infos structure points to and cache the results. 932 933void DynamicLoaderMacOSXDYLD::UpdateImageInfosHeaderAndLoadCommands( 934 ImageInfo::collection &image_infos, uint32_t infos_count, 935 bool update_executable) { 936 uint32_t exe_idx = UINT32_MAX; 937 // Read any UUID values that we can get 938 for (uint32_t i = 0; i < infos_count; i++) { 939 if (!image_infos[i].UUIDValid()) { 940 DataExtractor data; // Load command data 941 if (!ReadMachHeader(image_infos[i].address, &image_infos[i].header, 942 &data)) 943 continue; 944 945 ParseLoadCommands(data, image_infos[i], nullptr); 946 947 if (image_infos[i].header.filetype == llvm::MachO::MH_EXECUTE) 948 exe_idx = i; 949 } 950 } 951 952 Target &target = m_process->GetTarget(); 953 954 if (exe_idx < image_infos.size()) { 955 const bool can_create = true; 956 ModuleSP exe_module_sp(FindTargetModuleForImageInfo(image_infos[exe_idx], 957 can_create, nullptr)); 958 959 if (exe_module_sp) { 960 UpdateImageLoadAddress(exe_module_sp.get(), image_infos[exe_idx]); 961 962 if (exe_module_sp.get() != target.GetExecutableModulePointer()) { 963 // Don't load dependent images since we are in dyld where we will know 964 // and find out about all images that are loaded. Also when setting the 965 // executable module, it will clear the targets module list, and if we 966 // have an in memory dyld module, it will get removed from the list so 967 // we will need to add it back after setting the executable module, so 968 // we first try and see if we already have a weak pointer to the dyld 969 // module, make it into a shared pointer, then add the executable, then 970 // re-add it back to make sure it is always in the list. 971 ModuleSP dyld_module_sp(GetDYLDModule()); 972 973 m_process->GetTarget().SetExecutableModule(exe_module_sp, 974 eLoadDependentsNo); 975 976 if (dyld_module_sp) { 977 if (target.GetImages().AppendIfNeeded(dyld_module_sp)) { 978 std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); 979 980 // Also add it to the section list. 981 UpdateImageLoadAddress(dyld_module_sp.get(), m_dyld); 982 } 983 } 984 } 985 } 986 } 987} 988 989// Dump the _dyld_all_image_infos members and all current image infos that we 990// have parsed to the file handle provided. 991void DynamicLoaderMacOSXDYLD::PutToLog(Log *log) const { 992 if (log == nullptr) 993 return; 994 995 std::lock_guard<std::recursive_mutex> guard(m_mutex); 996 std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); 997 LLDB_LOGF(log, 998 "dyld_all_image_infos = { version=%d, count=%d, addr=0x%8.8" PRIx64 999 ", notify=0x%8.8" PRIx64 " }", 1000 m_dyld_all_image_infos.version, 1001 m_dyld_all_image_infos.dylib_info_count, 1002 (uint64_t)m_dyld_all_image_infos.dylib_info_addr, 1003 (uint64_t)m_dyld_all_image_infos.notification); 1004 size_t i; 1005 const size_t count = m_dyld_image_infos.size(); 1006 if (count > 0) { 1007 log->PutCString("Loaded:"); 1008 for (i = 0; i < count; i++) 1009 m_dyld_image_infos[i].PutToLog(log); 1010 } 1011} 1012 1013bool DynamicLoaderMacOSXDYLD::SetNotificationBreakpoint() { 1014 DEBUG_PRINTF("DynamicLoaderMacOSXDYLD::%s() process state = %s\n", 1015 __FUNCTION__, StateAsCString(m_process->GetState())); 1016 if (m_break_id == LLDB_INVALID_BREAK_ID) { 1017 if (m_dyld_all_image_infos.notification != LLDB_INVALID_ADDRESS) { 1018 Address so_addr; 1019 // Set the notification breakpoint and install a breakpoint callback 1020 // function that will get called each time the breakpoint gets hit. We 1021 // will use this to track when shared libraries get loaded/unloaded. 1022 bool resolved = m_process->GetTarget().ResolveLoadAddress( 1023 m_dyld_all_image_infos.notification, so_addr); 1024 if (!resolved) { 1025 ModuleSP dyld_module_sp = GetDYLDModule(); 1026 if (dyld_module_sp) { 1027 std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); 1028 1029 UpdateImageLoadAddress(dyld_module_sp.get(), m_dyld); 1030 resolved = m_process->GetTarget().ResolveLoadAddress( 1031 m_dyld_all_image_infos.notification, so_addr); 1032 } 1033 } 1034 1035 if (resolved) { 1036 Breakpoint *dyld_break = 1037 m_process->GetTarget().CreateBreakpoint(so_addr, true, false).get(); 1038 dyld_break->SetCallback(DynamicLoaderMacOSXDYLD::NotifyBreakpointHit, 1039 this, true); 1040 dyld_break->SetBreakpointKind("shared-library-event"); 1041 m_break_id = dyld_break->GetID(); 1042 } 1043 } 1044 } 1045 return m_break_id != LLDB_INVALID_BREAK_ID; 1046} 1047 1048Status DynamicLoaderMacOSXDYLD::CanLoadImage() { 1049 Status error; 1050 // In order for us to tell if we can load a shared library we verify that the 1051 // dylib_info_addr isn't zero (which means no shared libraries have been set 1052 // yet, or dyld is currently mucking with the shared library list). 1053 if (ReadAllImageInfosStructure()) { 1054 // TODO: also check the _dyld_global_lock_held variable in 1055 // libSystem.B.dylib? 1056 // TODO: check the malloc lock? 1057 // TODO: check the objective C lock? 1058 if (m_dyld_all_image_infos.dylib_info_addr != 0) 1059 return error; // Success 1060 } 1061 1062 error.SetErrorString("unsafe to load or unload shared libraries"); 1063 return error; 1064} 1065 1066bool DynamicLoaderMacOSXDYLD::GetSharedCacheInformation( 1067 lldb::addr_t &base_address, UUID &uuid, LazyBool &using_shared_cache, 1068 LazyBool &private_shared_cache) { 1069 base_address = LLDB_INVALID_ADDRESS; 1070 uuid.Clear(); 1071 using_shared_cache = eLazyBoolCalculate; 1072 private_shared_cache = eLazyBoolCalculate; 1073 1074 if (m_process) { 1075 addr_t all_image_infos = m_process->GetImageInfoAddress(); 1076 1077 // The address returned by GetImageInfoAddress may be the address of dyld 1078 // (don't want) or it may be the address of the dyld_all_image_infos 1079 // structure (want). The first four bytes will be either the version field 1080 // (all_image_infos) or a Mach-O file magic constant. Version 13 and higher 1081 // of dyld_all_image_infos is required to get the sharedCacheUUID field. 1082 1083 Status err; 1084 uint32_t version_or_magic = 1085 m_process->ReadUnsignedIntegerFromMemory(all_image_infos, 4, -1, err); 1086 if (version_or_magic != static_cast<uint32_t>(-1) && 1087 version_or_magic != llvm::MachO::MH_MAGIC && 1088 version_or_magic != llvm::MachO::MH_CIGAM && 1089 version_or_magic != llvm::MachO::MH_MAGIC_64 && 1090 version_or_magic != llvm::MachO::MH_CIGAM_64 && 1091 version_or_magic >= 13) { 1092 addr_t sharedCacheUUID_address = LLDB_INVALID_ADDRESS; 1093 int wordsize = m_process->GetAddressByteSize(); 1094 if (wordsize == 8) { 1095 sharedCacheUUID_address = 1096 all_image_infos + 160; // sharedCacheUUID <mach-o/dyld_images.h> 1097 } 1098 if (wordsize == 4) { 1099 sharedCacheUUID_address = 1100 all_image_infos + 84; // sharedCacheUUID <mach-o/dyld_images.h> 1101 } 1102 if (sharedCacheUUID_address != LLDB_INVALID_ADDRESS) { 1103 uuid_t shared_cache_uuid; 1104 if (m_process->ReadMemory(sharedCacheUUID_address, shared_cache_uuid, 1105 sizeof(uuid_t), err) == sizeof(uuid_t)) { 1106 uuid = UUID(shared_cache_uuid, 16); 1107 if (uuid.IsValid()) { 1108 using_shared_cache = eLazyBoolYes; 1109 } 1110 } 1111 1112 if (version_or_magic >= 15) { 1113 // The sharedCacheBaseAddress field is the next one in the 1114 // dyld_all_image_infos struct. 1115 addr_t sharedCacheBaseAddr_address = sharedCacheUUID_address + 16; 1116 Status error; 1117 base_address = m_process->ReadUnsignedIntegerFromMemory( 1118 sharedCacheBaseAddr_address, wordsize, LLDB_INVALID_ADDRESS, 1119 error); 1120 if (error.Fail()) 1121 base_address = LLDB_INVALID_ADDRESS; 1122 } 1123 1124 return true; 1125 } 1126 1127 // 1128 // add 1129 // NB: sharedCacheBaseAddress is the next field in dyld_all_image_infos 1130 // after 1131 // sharedCacheUUID -- that is, 16 bytes after it, if we wanted to fetch 1132 // it. 1133 } 1134 } 1135 return false; 1136} 1137 1138bool DynamicLoaderMacOSXDYLD::IsFullyInitialized() { 1139 if (ReadAllImageInfosStructure()) 1140 return m_dyld_all_image_infos.libSystemInitialized; 1141 return false; 1142} 1143 1144void DynamicLoaderMacOSXDYLD::Initialize() { 1145 PluginManager::RegisterPlugin(GetPluginNameStatic(), 1146 GetPluginDescriptionStatic(), CreateInstance); 1147 DynamicLoaderMacOS::Initialize(); 1148} 1149 1150void DynamicLoaderMacOSXDYLD::Terminate() { 1151 DynamicLoaderMacOS::Terminate(); 1152 PluginManager::UnregisterPlugin(CreateInstance); 1153} 1154 1155llvm::StringRef DynamicLoaderMacOSXDYLD::GetPluginDescriptionStatic() { 1156 return "Dynamic loader plug-in that watches for shared library loads/unloads " 1157 "in MacOSX user processes."; 1158} 1159 1160uint32_t DynamicLoaderMacOSXDYLD::AddrByteSize() { 1161 std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); 1162 1163 switch (m_dyld.header.magic) { 1164 case llvm::MachO::MH_MAGIC: 1165 case llvm::MachO::MH_CIGAM: 1166 return 4; 1167 1168 case llvm::MachO::MH_MAGIC_64: 1169 case llvm::MachO::MH_CIGAM_64: 1170 return 8; 1171 1172 default: 1173 break; 1174 } 1175 return 0; 1176} 1177 1178lldb::ByteOrder DynamicLoaderMacOSXDYLD::GetByteOrderFromMagic(uint32_t magic) { 1179 switch (magic) { 1180 case llvm::MachO::MH_MAGIC: 1181 case llvm::MachO::MH_MAGIC_64: 1182 return endian::InlHostByteOrder(); 1183 1184 case llvm::MachO::MH_CIGAM: 1185 case llvm::MachO::MH_CIGAM_64: 1186 if (endian::InlHostByteOrder() == lldb::eByteOrderBig) 1187 return lldb::eByteOrderLittle; 1188 else 1189 return lldb::eByteOrderBig; 1190 1191 default: 1192 break; 1193 } 1194 return lldb::eByteOrderInvalid; 1195} 1196