1 //===-- DynamicLoaderMacOS.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 "lldb/Breakpoint/StoppointCallbackContext.h" 10 #include "lldb/Core/Debugger.h" 11 #include "lldb/Core/Module.h" 12 #include "lldb/Core/PluginManager.h" 13 #include "lldb/Core/Section.h" 14 #include "lldb/Symbol/ObjectFile.h" 15 #include "lldb/Symbol/SymbolVendor.h" 16 #include "lldb/Target/ABI.h" 17 #include "lldb/Target/SectionLoadList.h" 18 #include "lldb/Target/StackFrame.h" 19 #include "lldb/Target/Target.h" 20 #include "lldb/Target/Thread.h" 21 #include "lldb/Utility/LLDBLog.h" 22 #include "lldb/Utility/Log.h" 23 #include "lldb/Utility/State.h" 24 25 #include "DynamicLoaderDarwin.h" 26 #include "DynamicLoaderMacOS.h" 27 28 #include "Plugins/TypeSystem/Clang/TypeSystemClang.h" 29 30 using namespace lldb; 31 using namespace lldb_private; 32 33 // Create an instance of this class. This function is filled into the plugin 34 // info class that gets handed out by the plugin factory and allows the lldb to 35 // instantiate an instance of this class. 36 DynamicLoader *DynamicLoaderMacOS::CreateInstance(Process *process, 37 bool force) { 38 bool create = force; 39 if (!create) { 40 create = true; 41 Module *exe_module = process->GetTarget().GetExecutableModulePointer(); 42 if (exe_module) { 43 ObjectFile *object_file = exe_module->GetObjectFile(); 44 if (object_file) { 45 create = (object_file->GetStrata() == ObjectFile::eStrataUser); 46 } 47 } 48 49 if (create) { 50 const llvm::Triple &triple_ref = 51 process->GetTarget().GetArchitecture().GetTriple(); 52 switch (triple_ref.getOS()) { 53 case llvm::Triple::Darwin: 54 case llvm::Triple::MacOSX: 55 case llvm::Triple::IOS: 56 case llvm::Triple::TvOS: 57 case llvm::Triple::WatchOS: 58 // NEED_BRIDGEOS_TRIPLE case llvm::Triple::BridgeOS: 59 create = triple_ref.getVendor() == llvm::Triple::Apple; 60 break; 61 default: 62 create = false; 63 break; 64 } 65 } 66 } 67 68 if (!UseDYLDSPI(process)) { 69 create = false; 70 } 71 72 if (create) 73 return new DynamicLoaderMacOS(process); 74 return nullptr; 75 } 76 77 // Constructor 78 DynamicLoaderMacOS::DynamicLoaderMacOS(Process *process) 79 : DynamicLoaderDarwin(process), m_image_infos_stop_id(UINT32_MAX), 80 m_break_id(LLDB_INVALID_BREAK_ID), 81 m_dyld_handover_break_id(LLDB_INVALID_BREAK_ID), m_mutex(), 82 m_maybe_image_infos_address(LLDB_INVALID_ADDRESS), 83 m_libsystem_fully_initalized(false) {} 84 85 // Destructor 86 DynamicLoaderMacOS::~DynamicLoaderMacOS() { 87 if (LLDB_BREAK_ID_IS_VALID(m_break_id)) 88 m_process->GetTarget().RemoveBreakpointByID(m_break_id); 89 if (LLDB_BREAK_ID_IS_VALID(m_dyld_handover_break_id)) 90 m_process->GetTarget().RemoveBreakpointByID(m_dyld_handover_break_id); 91 } 92 93 bool DynamicLoaderMacOS::ProcessDidExec() { 94 std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); 95 bool did_exec = false; 96 if (m_process) { 97 // If we are stopped after an exec, we will have only one thread... 98 if (m_process->GetThreadList().GetSize() == 1) { 99 // Maybe we still have an image infos address around? If so see 100 // if that has changed, and if so we have exec'ed. 101 if (m_maybe_image_infos_address != LLDB_INVALID_ADDRESS) { 102 lldb::addr_t image_infos_address = m_process->GetImageInfoAddress(); 103 if (image_infos_address != m_maybe_image_infos_address) { 104 // We don't really have to reset this here, since we are going to 105 // call DoInitialImageFetch right away to handle the exec. But in 106 // case anybody looks at it in the meantime, it can't hurt. 107 m_maybe_image_infos_address = image_infos_address; 108 did_exec = true; 109 } 110 } 111 112 if (!did_exec) { 113 // See if we are stopped at '_dyld_start' 114 ThreadSP thread_sp(m_process->GetThreadList().GetThreadAtIndex(0)); 115 if (thread_sp) { 116 lldb::StackFrameSP frame_sp(thread_sp->GetStackFrameAtIndex(0)); 117 if (frame_sp) { 118 const Symbol *symbol = 119 frame_sp->GetSymbolContext(eSymbolContextSymbol).symbol; 120 if (symbol) { 121 if (symbol->GetName() == "_dyld_start") 122 did_exec = true; 123 } 124 } 125 } 126 } 127 } 128 } 129 130 if (did_exec) { 131 m_libpthread_module_wp.reset(); 132 m_pthread_getspecific_addr.Clear(); 133 m_libsystem_fully_initalized = false; 134 } 135 return did_exec; 136 } 137 138 // Clear out the state of this class. 139 void DynamicLoaderMacOS::DoClear() { 140 std::lock_guard<std::recursive_mutex> guard(m_mutex); 141 142 if (LLDB_BREAK_ID_IS_VALID(m_break_id)) 143 m_process->GetTarget().RemoveBreakpointByID(m_break_id); 144 if (LLDB_BREAK_ID_IS_VALID(m_dyld_handover_break_id)) 145 m_process->GetTarget().RemoveBreakpointByID(m_dyld_handover_break_id); 146 147 m_break_id = LLDB_INVALID_BREAK_ID; 148 m_dyld_handover_break_id = LLDB_INVALID_BREAK_ID; 149 m_libsystem_fully_initalized = false; 150 } 151 152 bool DynamicLoaderMacOS::IsFullyInitialized() { 153 if (m_libsystem_fully_initalized) 154 return true; 155 156 StructuredData::ObjectSP process_state_sp( 157 m_process->GetDynamicLoaderProcessState()); 158 if (!process_state_sp) 159 return true; 160 if (process_state_sp->GetAsDictionary()->HasKey("error")) 161 return true; 162 if (!process_state_sp->GetAsDictionary()->HasKey("process_state string")) 163 return true; 164 std::string proc_state = process_state_sp->GetAsDictionary() 165 ->GetValueForKey("process_state string") 166 ->GetAsString() 167 ->GetValue() 168 .str(); 169 if (proc_state == "dyld_process_state_not_started" || 170 proc_state == "dyld_process_state_dyld_initialized" || 171 proc_state == "dyld_process_state_terminated_before_inits") { 172 return false; 173 } 174 m_libsystem_fully_initalized = true; 175 return true; 176 } 177 178 // Check if we have found DYLD yet 179 bool DynamicLoaderMacOS::DidSetNotificationBreakpoint() { 180 return LLDB_BREAK_ID_IS_VALID(m_break_id); 181 } 182 183 void DynamicLoaderMacOS::ClearNotificationBreakpoint() { 184 if (LLDB_BREAK_ID_IS_VALID(m_break_id)) { 185 m_process->GetTarget().RemoveBreakpointByID(m_break_id); 186 m_break_id = LLDB_INVALID_BREAK_ID; 187 } 188 } 189 190 // Try and figure out where dyld is by first asking the Process if it knows 191 // (which currently calls down in the lldb::Process to get the DYLD info 192 // (available on SnowLeopard only). If that fails, then check in the default 193 // addresses. 194 void DynamicLoaderMacOS::DoInitialImageFetch() { 195 Log *log = GetLog(LLDBLog::DynamicLoader); 196 197 // Remove any binaries we pre-loaded in the Target before 198 // launching/attaching. If the same binaries are present in the process, 199 // we'll get them from the shared module cache, we won't need to re-load them 200 // from disk. 201 UnloadAllImages(); 202 203 StructuredData::ObjectSP all_image_info_json_sp( 204 m_process->GetLoadedDynamicLibrariesInfos()); 205 ImageInfo::collection image_infos; 206 if (all_image_info_json_sp.get() && 207 all_image_info_json_sp->GetAsDictionary() && 208 all_image_info_json_sp->GetAsDictionary()->HasKey("images") && 209 all_image_info_json_sp->GetAsDictionary() 210 ->GetValueForKey("images") 211 ->GetAsArray()) { 212 if (JSONImageInformationIntoImageInfo(all_image_info_json_sp, 213 image_infos)) { 214 LLDB_LOGF(log, "Initial module fetch: Adding %" PRId64 " modules.\n", 215 (uint64_t)image_infos.size()); 216 217 UpdateSpecialBinariesFromNewImageInfos(image_infos); 218 AddModulesUsingImageInfos(image_infos); 219 } 220 } 221 222 m_dyld_image_infos_stop_id = m_process->GetStopID(); 223 m_maybe_image_infos_address = m_process->GetImageInfoAddress(); 224 } 225 226 bool DynamicLoaderMacOS::NeedToDoInitialImageFetch() { return true; } 227 228 // Static callback function that gets called when our DYLD notification 229 // breakpoint gets hit. We update all of our image infos and then let our super 230 // class DynamicLoader class decide if we should stop or not (based on global 231 // preference). 232 bool DynamicLoaderMacOS::NotifyBreakpointHit(void *baton, 233 StoppointCallbackContext *context, 234 lldb::user_id_t break_id, 235 lldb::user_id_t break_loc_id) { 236 // Let the event know that the images have changed 237 // DYLD passes three arguments to the notification breakpoint. 238 // Arg1: enum dyld_notify_mode mode - 0 = adding, 1 = removing, 2 = remove 239 // all Arg2: unsigned long icount - Number of shared libraries 240 // added/removed Arg3: uint64_t mach_headers[] - Array of load addresses 241 // of binaries added/removed 242 243 DynamicLoaderMacOS *dyld_instance = (DynamicLoaderMacOS *)baton; 244 245 ExecutionContext exe_ctx(context->exe_ctx_ref); 246 Process *process = exe_ctx.GetProcessPtr(); 247 248 // This is a sanity check just in case this dyld_instance is an old dyld 249 // plugin's breakpoint still lying around. 250 if (process != dyld_instance->m_process) 251 return false; 252 253 if (dyld_instance->m_image_infos_stop_id != UINT32_MAX && 254 process->GetStopID() < dyld_instance->m_image_infos_stop_id) { 255 return false; 256 } 257 258 const lldb::ABISP &abi = process->GetABI(); 259 if (abi) { 260 // Build up the value array to store the three arguments given above, then 261 // get the values from the ABI: 262 263 TypeSystemClangSP scratch_ts_sp = 264 ScratchTypeSystemClang::GetForTarget(process->GetTarget()); 265 if (!scratch_ts_sp) 266 return false; 267 268 ValueList argument_values; 269 270 Value mode_value; // enum dyld_notify_mode { dyld_notify_adding=0, 271 // dyld_notify_removing=1, dyld_notify_remove_all=2 }; 272 Value count_value; // unsigned long count 273 Value headers_value; // uint64_t machHeaders[] (aka void*) 274 275 CompilerType clang_void_ptr_type = 276 scratch_ts_sp->GetBasicType(eBasicTypeVoid).GetPointerType(); 277 CompilerType clang_uint32_type = 278 scratch_ts_sp->GetBuiltinTypeForEncodingAndBitSize(lldb::eEncodingUint, 279 32); 280 CompilerType clang_uint64_type = 281 scratch_ts_sp->GetBuiltinTypeForEncodingAndBitSize(lldb::eEncodingUint, 282 32); 283 284 mode_value.SetValueType(Value::ValueType::Scalar); 285 mode_value.SetCompilerType(clang_uint32_type); 286 287 if (process->GetTarget().GetArchitecture().GetAddressByteSize() == 4) { 288 count_value.SetValueType(Value::ValueType::Scalar); 289 count_value.SetCompilerType(clang_uint32_type); 290 } else { 291 count_value.SetValueType(Value::ValueType::Scalar); 292 count_value.SetCompilerType(clang_uint64_type); 293 } 294 295 headers_value.SetValueType(Value::ValueType::Scalar); 296 headers_value.SetCompilerType(clang_void_ptr_type); 297 298 argument_values.PushValue(mode_value); 299 argument_values.PushValue(count_value); 300 argument_values.PushValue(headers_value); 301 302 if (abi->GetArgumentValues(exe_ctx.GetThreadRef(), argument_values)) { 303 uint32_t dyld_mode = 304 argument_values.GetValueAtIndex(0)->GetScalar().UInt(-1); 305 if (dyld_mode != static_cast<uint32_t>(-1)) { 306 // Okay the mode was right, now get the number of elements, and the 307 // array of new elements... 308 uint32_t image_infos_count = 309 argument_values.GetValueAtIndex(1)->GetScalar().UInt(-1); 310 if (image_infos_count != static_cast<uint32_t>(-1)) { 311 addr_t header_array = 312 argument_values.GetValueAtIndex(2)->GetScalar().ULongLong(-1); 313 if (header_array != static_cast<uint64_t>(-1)) { 314 std::vector<addr_t> image_load_addresses; 315 for (uint64_t i = 0; i < image_infos_count; i++) { 316 Status error; 317 addr_t addr = process->ReadUnsignedIntegerFromMemory( 318 header_array + (8 * i), 8, LLDB_INVALID_ADDRESS, error); 319 if (addr != LLDB_INVALID_ADDRESS) { 320 image_load_addresses.push_back(addr); 321 } 322 } 323 if (dyld_mode == 0) { 324 // dyld_notify_adding 325 if (process->GetTarget().GetImages().GetSize() == 0) { 326 // When all images have been removed, we're doing the 327 // dyld handover from a launch-dyld to a shared-cache-dyld, 328 // and we've just hit our one-shot address breakpoint in 329 // the sc-dyld. Note that the image addresses passed to 330 // this function are inferior sizeof(void*) not uint64_t's 331 // like our normal notification, so don't even look at 332 // image_load_addresses. 333 334 dyld_instance->ClearDYLDHandoverBreakpoint(); 335 336 dyld_instance->DoInitialImageFetch(); 337 dyld_instance->SetNotificationBreakpoint(); 338 } else { 339 dyld_instance->AddBinaries(image_load_addresses); 340 } 341 } else if (dyld_mode == 1) { 342 // dyld_notify_removing 343 dyld_instance->UnloadImages(image_load_addresses); 344 } else if (dyld_mode == 2) { 345 // dyld_notify_remove_all 346 dyld_instance->UnloadAllImages(); 347 } else if (dyld_mode == 3 && image_infos_count == 1) { 348 // dyld_image_dyld_moved 349 350 dyld_instance->ClearNotificationBreakpoint(); 351 dyld_instance->UnloadAllImages(); 352 dyld_instance->ClearDYLDModule(); 353 process->GetTarget().GetImages().Clear(); 354 process->GetTarget().GetSectionLoadList().Clear(); 355 356 addr_t all_image_infos = process->GetImageInfoAddress(); 357 int addr_size = 358 process->GetTarget().GetArchitecture().GetAddressByteSize(); 359 addr_t notification_location = all_image_infos + 4 + // version 360 4 + // infoArrayCount 361 addr_size; // infoArray 362 Status error; 363 addr_t notification_addr = 364 process->ReadPointerFromMemory(notification_location, error); 365 if (ABISP abi_sp = process->GetABI()) 366 notification_addr = abi_sp->FixCodeAddress(notification_addr); 367 368 dyld_instance->SetDYLDHandoverBreakpoint(notification_addr); 369 } 370 } 371 } 372 } 373 } 374 } else { 375 Target &target = process->GetTarget(); 376 Debugger::ReportWarning( 377 "no ABI plugin located for triple " + 378 target.GetArchitecture().GetTriple().getTriple() + 379 ": shared libraries will not be registered", 380 target.GetDebugger().GetID()); 381 } 382 383 // Return true to stop the target, false to just let the target run 384 return dyld_instance->GetStopWhenImagesChange(); 385 } 386 387 void DynamicLoaderMacOS::AddBinaries( 388 const std::vector<lldb::addr_t> &load_addresses) { 389 Log *log = GetLog(LLDBLog::DynamicLoader); 390 ImageInfo::collection image_infos; 391 392 LLDB_LOGF(log, "Adding %" PRId64 " modules.", 393 (uint64_t)load_addresses.size()); 394 StructuredData::ObjectSP binaries_info_sp = 395 m_process->GetLoadedDynamicLibrariesInfos(load_addresses); 396 if (binaries_info_sp.get() && binaries_info_sp->GetAsDictionary() && 397 binaries_info_sp->GetAsDictionary()->HasKey("images") && 398 binaries_info_sp->GetAsDictionary() 399 ->GetValueForKey("images") 400 ->GetAsArray() && 401 binaries_info_sp->GetAsDictionary() 402 ->GetValueForKey("images") 403 ->GetAsArray() 404 ->GetSize() == load_addresses.size()) { 405 if (JSONImageInformationIntoImageInfo(binaries_info_sp, image_infos)) { 406 UpdateSpecialBinariesFromNewImageInfos(image_infos); 407 AddModulesUsingImageInfos(image_infos); 408 } 409 m_dyld_image_infos_stop_id = m_process->GetStopID(); 410 } 411 } 412 413 // Dump the _dyld_all_image_infos members and all current image infos that we 414 // have parsed to the file handle provided. 415 void DynamicLoaderMacOS::PutToLog(Log *log) const { 416 if (log == nullptr) 417 return; 418 } 419 420 bool DynamicLoaderMacOS::SetNotificationBreakpoint() { 421 if (m_break_id == LLDB_INVALID_BREAK_ID) { 422 ModuleSP dyld_sp(GetDYLDModule()); 423 if (dyld_sp) { 424 bool internal = true; 425 bool hardware = false; 426 LazyBool skip_prologue = eLazyBoolNo; 427 FileSpecList *source_files = nullptr; 428 FileSpecList dyld_filelist; 429 dyld_filelist.Append(dyld_sp->GetFileSpec()); 430 431 Breakpoint *breakpoint = 432 m_process->GetTarget() 433 .CreateBreakpoint(&dyld_filelist, source_files, 434 "_dyld_debugger_notification", 435 eFunctionNameTypeFull, eLanguageTypeC, 0, 436 skip_prologue, internal, hardware) 437 .get(); 438 breakpoint->SetCallback(DynamicLoaderMacOS::NotifyBreakpointHit, this, 439 true); 440 breakpoint->SetBreakpointKind("shared-library-event"); 441 m_break_id = breakpoint->GetID(); 442 } 443 } 444 return m_break_id != LLDB_INVALID_BREAK_ID; 445 } 446 447 bool DynamicLoaderMacOS::SetDYLDHandoverBreakpoint( 448 addr_t notification_address) { 449 if (m_dyld_handover_break_id == LLDB_INVALID_BREAK_ID) { 450 BreakpointSP dyld_handover_bp = m_process->GetTarget().CreateBreakpoint( 451 notification_address, true, false); 452 dyld_handover_bp->SetCallback(DynamicLoaderMacOS::NotifyBreakpointHit, this, 453 true); 454 dyld_handover_bp->SetOneShot(true); 455 m_dyld_handover_break_id = dyld_handover_bp->GetID(); 456 return true; 457 } 458 return false; 459 } 460 461 void DynamicLoaderMacOS::ClearDYLDHandoverBreakpoint() { 462 if (LLDB_BREAK_ID_IS_VALID(m_dyld_handover_break_id)) 463 m_process->GetTarget().RemoveBreakpointByID(m_dyld_handover_break_id); 464 m_dyld_handover_break_id = LLDB_INVALID_BREAK_ID; 465 } 466 467 addr_t 468 DynamicLoaderMacOS::GetDyldLockVariableAddressFromModule(Module *module) { 469 SymbolContext sc; 470 Target &target = m_process->GetTarget(); 471 if (Symtab *symtab = module->GetSymtab()) { 472 std::vector<uint32_t> match_indexes; 473 ConstString g_symbol_name("_dyld_global_lock_held"); 474 uint32_t num_matches = 0; 475 num_matches = 476 symtab->AppendSymbolIndexesWithName(g_symbol_name, match_indexes); 477 if (num_matches == 1) { 478 Symbol *symbol = symtab->SymbolAtIndex(match_indexes[0]); 479 if (symbol && 480 (symbol->ValueIsAddress() || symbol->GetAddressRef().IsValid())) { 481 return symbol->GetAddressRef().GetOpcodeLoadAddress(&target); 482 } 483 } 484 } 485 return LLDB_INVALID_ADDRESS; 486 } 487 488 // Look for this symbol: 489 // 490 // int __attribute__((visibility("hidden"))) _dyld_global_lock_held = 491 // 0; 492 // 493 // in libdyld.dylib. 494 Status DynamicLoaderMacOS::CanLoadImage() { 495 Status error; 496 addr_t symbol_address = LLDB_INVALID_ADDRESS; 497 ConstString g_libdyld_name("libdyld.dylib"); 498 Target &target = m_process->GetTarget(); 499 const ModuleList &target_modules = target.GetImages(); 500 std::lock_guard<std::recursive_mutex> guard(target_modules.GetMutex()); 501 502 // Find any modules named "libdyld.dylib" and look for the symbol there first 503 for (ModuleSP module_sp : target.GetImages().ModulesNoLocking()) { 504 if (module_sp) { 505 if (module_sp->GetFileSpec().GetFilename() == g_libdyld_name) { 506 symbol_address = GetDyldLockVariableAddressFromModule(module_sp.get()); 507 if (symbol_address != LLDB_INVALID_ADDRESS) 508 break; 509 } 510 } 511 } 512 513 // Search through all modules looking for the symbol in them 514 if (symbol_address == LLDB_INVALID_ADDRESS) { 515 for (ModuleSP module_sp : target.GetImages().Modules()) { 516 if (module_sp) { 517 addr_t symbol_address = 518 GetDyldLockVariableAddressFromModule(module_sp.get()); 519 if (symbol_address != LLDB_INVALID_ADDRESS) 520 break; 521 } 522 } 523 } 524 525 // Default assumption is that it is OK to load images. Only say that we 526 // cannot load images if we find the symbol in libdyld and it indicates that 527 // we cannot. 528 529 if (symbol_address != LLDB_INVALID_ADDRESS) { 530 { 531 int lock_held = 532 m_process->ReadUnsignedIntegerFromMemory(symbol_address, 4, 0, error); 533 if (lock_held != 0) { 534 error.SetErrorString("dyld lock held - unsafe to load images."); 535 } 536 } 537 } else { 538 // If we were unable to find _dyld_global_lock_held in any modules, or it 539 // is not loaded into memory yet, we may be at process startup (sitting at 540 // _dyld_start) - so we should not allow dlopen calls. But if we found more 541 // than one module then we are clearly past _dyld_start so in that case 542 // we'll default to "it's safe". 543 if (target.GetImages().GetSize() <= 1) 544 error.SetErrorString("could not find the dyld library or " 545 "the dyld lock symbol"); 546 } 547 return error; 548 } 549 550 bool DynamicLoaderMacOS::GetSharedCacheInformation( 551 lldb::addr_t &base_address, UUID &uuid, LazyBool &using_shared_cache, 552 LazyBool &private_shared_cache) { 553 base_address = LLDB_INVALID_ADDRESS; 554 uuid.Clear(); 555 using_shared_cache = eLazyBoolCalculate; 556 private_shared_cache = eLazyBoolCalculate; 557 558 if (m_process) { 559 StructuredData::ObjectSP info = m_process->GetSharedCacheInfo(); 560 StructuredData::Dictionary *info_dict = nullptr; 561 if (info.get() && info->GetAsDictionary()) { 562 info_dict = info->GetAsDictionary(); 563 } 564 565 // {"shared_cache_base_address":140735683125248,"shared_cache_uuid 566 // ":"DDB8D70C- 567 // C9A2-3561-B2C8-BE48A4F33F96","no_shared_cache":false,"shared_cache_private_cache":false} 568 569 if (info_dict && info_dict->HasKey("shared_cache_uuid") && 570 info_dict->HasKey("no_shared_cache") && 571 info_dict->HasKey("shared_cache_base_address")) { 572 base_address = info_dict->GetValueForKey("shared_cache_base_address") 573 ->GetIntegerValue(LLDB_INVALID_ADDRESS); 574 std::string uuid_str = std::string( 575 info_dict->GetValueForKey("shared_cache_uuid")->GetStringValue()); 576 if (!uuid_str.empty()) 577 uuid.SetFromStringRef(uuid_str); 578 if (!info_dict->GetValueForKey("no_shared_cache")->GetBooleanValue()) 579 using_shared_cache = eLazyBoolYes; 580 else 581 using_shared_cache = eLazyBoolNo; 582 if (info_dict->GetValueForKey("shared_cache_private_cache") 583 ->GetBooleanValue()) 584 private_shared_cache = eLazyBoolYes; 585 else 586 private_shared_cache = eLazyBoolNo; 587 588 return true; 589 } 590 } 591 return false; 592 } 593 594 void DynamicLoaderMacOS::Initialize() { 595 PluginManager::RegisterPlugin(GetPluginNameStatic(), 596 GetPluginDescriptionStatic(), CreateInstance); 597 } 598 599 void DynamicLoaderMacOS::Terminate() { 600 PluginManager::UnregisterPlugin(CreateInstance); 601 } 602 603 llvm::StringRef DynamicLoaderMacOS::GetPluginDescriptionStatic() { 604 return "Dynamic loader plug-in that watches for shared library loads/unloads " 605 "in MacOSX user processes."; 606 } 607