1 //===-- ItaniumABILanguageRuntime.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 "ItaniumABILanguageRuntime.h" 10 11 #include "Plugins/TypeSystem/Clang/TypeSystemClang.h" 12 #include "lldb/Breakpoint/BreakpointLocation.h" 13 #include "lldb/Core/Mangled.h" 14 #include "lldb/Core/Module.h" 15 #include "lldb/Core/PluginManager.h" 16 #include "lldb/Core/ValueObject.h" 17 #include "lldb/Core/ValueObjectMemory.h" 18 #include "lldb/DataFormatters/FormattersHelpers.h" 19 #include "lldb/Expression/DiagnosticManager.h" 20 #include "lldb/Expression/FunctionCaller.h" 21 #include "lldb/Interpreter/CommandObject.h" 22 #include "lldb/Interpreter/CommandObjectMultiword.h" 23 #include "lldb/Interpreter/CommandReturnObject.h" 24 #include "lldb/Symbol/Symbol.h" 25 #include "lldb/Symbol/SymbolFile.h" 26 #include "lldb/Symbol/TypeList.h" 27 #include "lldb/Target/Process.h" 28 #include "lldb/Target/RegisterContext.h" 29 #include "lldb/Target/SectionLoadList.h" 30 #include "lldb/Target/StopInfo.h" 31 #include "lldb/Target/Target.h" 32 #include "lldb/Target/Thread.h" 33 #include "lldb/Utility/ConstString.h" 34 #include "lldb/Utility/LLDBLog.h" 35 #include "lldb/Utility/Log.h" 36 #include "lldb/Utility/Scalar.h" 37 #include "lldb/Utility/Status.h" 38 39 #include <vector> 40 41 using namespace lldb; 42 using namespace lldb_private; 43 44 LLDB_PLUGIN_DEFINE_ADV(ItaniumABILanguageRuntime, CXXItaniumABI) 45 46 static const char *vtable_demangled_prefix = "vtable for "; 47 48 char ItaniumABILanguageRuntime::ID = 0; 49 50 bool ItaniumABILanguageRuntime::CouldHaveDynamicValue(ValueObject &in_value) { 51 const bool check_cxx = true; 52 const bool check_objc = false; 53 return in_value.GetCompilerType().IsPossibleDynamicType(nullptr, check_cxx, 54 check_objc); 55 } 56 57 TypeAndOrName ItaniumABILanguageRuntime::GetTypeInfoFromVTableAddress( 58 ValueObject &in_value, lldb::addr_t original_ptr, 59 lldb::addr_t vtable_load_addr) { 60 if (m_process && vtable_load_addr != LLDB_INVALID_ADDRESS) { 61 // Find the symbol that contains the "vtable_load_addr" address 62 Address vtable_addr; 63 Target &target = m_process->GetTarget(); 64 if (!target.GetSectionLoadList().IsEmpty()) { 65 if (target.GetSectionLoadList().ResolveLoadAddress(vtable_load_addr, 66 vtable_addr)) { 67 // See if we have cached info for this type already 68 TypeAndOrName type_info = GetDynamicTypeInfo(vtable_addr); 69 if (type_info) 70 return type_info; 71 72 SymbolContext sc; 73 target.GetImages().ResolveSymbolContextForAddress( 74 vtable_addr, eSymbolContextSymbol, sc); 75 Symbol *symbol = sc.symbol; 76 if (symbol != nullptr) { 77 const char *name = 78 symbol->GetMangled().GetDemangledName().AsCString(); 79 if (name && strstr(name, vtable_demangled_prefix) == name) { 80 Log *log = GetLog(LLDBLog::Object); 81 LLDB_LOGF(log, 82 "0x%16.16" PRIx64 83 ": static-type = '%s' has vtable symbol '%s'\n", 84 original_ptr, in_value.GetTypeName().GetCString(), name); 85 // We are a C++ class, that's good. Get the class name and look it 86 // up: 87 const char *class_name = name + strlen(vtable_demangled_prefix); 88 // We know the class name is absolute, so tell FindTypes that by 89 // prefixing it with the root namespace: 90 std::string lookup_name("::"); 91 lookup_name.append(class_name); 92 93 type_info.SetName(class_name); 94 const bool exact_match = true; 95 TypeList class_types; 96 97 // First look in the module that the vtable symbol came from and 98 // look for a single exact match. 99 llvm::DenseSet<SymbolFile *> searched_symbol_files; 100 if (sc.module_sp) 101 sc.module_sp->FindTypes(ConstString(lookup_name), exact_match, 1, 102 searched_symbol_files, class_types); 103 104 // If we didn't find a symbol, then move on to the entire module 105 // list in the target and get as many unique matches as possible 106 if (class_types.Empty()) 107 target.GetImages().FindTypes(nullptr, ConstString(lookup_name), 108 exact_match, UINT32_MAX, 109 searched_symbol_files, class_types); 110 111 lldb::TypeSP type_sp; 112 if (class_types.Empty()) { 113 LLDB_LOGF(log, "0x%16.16" PRIx64 ": is not dynamic\n", 114 original_ptr); 115 return TypeAndOrName(); 116 } 117 if (class_types.GetSize() == 1) { 118 type_sp = class_types.GetTypeAtIndex(0); 119 if (type_sp) { 120 if (TypeSystemClang::IsCXXClassType( 121 type_sp->GetForwardCompilerType())) { 122 LLDB_LOGF( 123 log, 124 "0x%16.16" PRIx64 125 ": static-type = '%s' has dynamic type: uid={0x%" PRIx64 126 "}, type-name='%s'\n", 127 original_ptr, in_value.GetTypeName().AsCString(), 128 type_sp->GetID(), type_sp->GetName().GetCString()); 129 type_info.SetTypeSP(type_sp); 130 } 131 } 132 } else { 133 size_t i; 134 if (log) { 135 for (i = 0; i < class_types.GetSize(); i++) { 136 type_sp = class_types.GetTypeAtIndex(i); 137 if (type_sp) { 138 LLDB_LOGF( 139 log, 140 "0x%16.16" PRIx64 141 ": static-type = '%s' has multiple matching dynamic " 142 "types: uid={0x%" PRIx64 "}, type-name='%s'\n", 143 original_ptr, in_value.GetTypeName().AsCString(), 144 type_sp->GetID(), type_sp->GetName().GetCString()); 145 } 146 } 147 } 148 149 for (i = 0; i < class_types.GetSize(); i++) { 150 type_sp = class_types.GetTypeAtIndex(i); 151 if (type_sp) { 152 if (TypeSystemClang::IsCXXClassType( 153 type_sp->GetForwardCompilerType())) { 154 LLDB_LOGF( 155 log, 156 "0x%16.16" PRIx64 ": static-type = '%s' has multiple " 157 "matching dynamic types, picking " 158 "this one: uid={0x%" PRIx64 "}, type-name='%s'\n", 159 original_ptr, in_value.GetTypeName().AsCString(), 160 type_sp->GetID(), type_sp->GetName().GetCString()); 161 type_info.SetTypeSP(type_sp); 162 } 163 } 164 } 165 166 if (log) { 167 LLDB_LOGF(log, 168 "0x%16.16" PRIx64 169 ": static-type = '%s' has multiple matching dynamic " 170 "types, didn't find a C++ match\n", 171 original_ptr, in_value.GetTypeName().AsCString()); 172 } 173 } 174 if (type_info) 175 SetDynamicTypeInfo(vtable_addr, type_info); 176 return type_info; 177 } 178 } 179 } 180 } 181 } 182 return TypeAndOrName(); 183 } 184 185 bool ItaniumABILanguageRuntime::GetDynamicTypeAndAddress( 186 ValueObject &in_value, lldb::DynamicValueType use_dynamic, 187 TypeAndOrName &class_type_or_name, Address &dynamic_address, 188 Value::ValueType &value_type) { 189 // For Itanium, if the type has a vtable pointer in the object, it will be at 190 // offset 0 in the object. That will point to the "address point" within the 191 // vtable (not the beginning of the vtable.) We can then look up the symbol 192 // containing this "address point" and that symbol's name demangled will 193 // contain the full class name. The second pointer above the "address point" 194 // is the "offset_to_top". We'll use that to get the start of the value 195 // object which holds the dynamic type. 196 // 197 198 class_type_or_name.Clear(); 199 value_type = Value::ValueType::Scalar; 200 201 // Only a pointer or reference type can have a different dynamic and static 202 // type: 203 if (!CouldHaveDynamicValue(in_value)) 204 return false; 205 206 // First job, pull out the address at 0 offset from the object. 207 AddressType address_type; 208 lldb::addr_t original_ptr = in_value.GetPointerValue(&address_type); 209 if (original_ptr == LLDB_INVALID_ADDRESS) 210 return false; 211 212 ExecutionContext exe_ctx(in_value.GetExecutionContextRef()); 213 214 Process *process = exe_ctx.GetProcessPtr(); 215 216 if (process == nullptr) 217 return false; 218 219 Status error; 220 const lldb::addr_t vtable_address_point = 221 process->ReadPointerFromMemory(original_ptr, error); 222 223 if (!error.Success() || vtable_address_point == LLDB_INVALID_ADDRESS) 224 return false; 225 226 class_type_or_name = GetTypeInfoFromVTableAddress(in_value, original_ptr, 227 vtable_address_point); 228 229 if (!class_type_or_name) 230 return false; 231 232 CompilerType type = class_type_or_name.GetCompilerType(); 233 // There can only be one type with a given name, so we've just found 234 // duplicate definitions, and this one will do as well as any other. We 235 // don't consider something to have a dynamic type if it is the same as 236 // the static type. So compare against the value we were handed. 237 if (!type) 238 return true; 239 240 if (TypeSystemClang::AreTypesSame(in_value.GetCompilerType(), type)) { 241 // The dynamic type we found was the same type, so we don't have a 242 // dynamic type here... 243 return false; 244 } 245 246 // The offset_to_top is two pointers above the vtable pointer. 247 const uint32_t addr_byte_size = process->GetAddressByteSize(); 248 const lldb::addr_t offset_to_top_location = 249 vtable_address_point - 2 * addr_byte_size; 250 // Watch for underflow, offset_to_top_location should be less than 251 // vtable_address_point 252 if (offset_to_top_location >= vtable_address_point) 253 return false; 254 const int64_t offset_to_top = process->ReadSignedIntegerFromMemory( 255 offset_to_top_location, addr_byte_size, INT64_MIN, error); 256 257 if (offset_to_top == INT64_MIN) 258 return false; 259 // So the dynamic type is a value that starts at offset_to_top above 260 // the original address. 261 lldb::addr_t dynamic_addr = original_ptr + offset_to_top; 262 if (!process->GetTarget().GetSectionLoadList().ResolveLoadAddress( 263 dynamic_addr, dynamic_address)) { 264 dynamic_address.SetRawAddress(dynamic_addr); 265 } 266 return true; 267 } 268 269 TypeAndOrName ItaniumABILanguageRuntime::FixUpDynamicType( 270 const TypeAndOrName &type_and_or_name, ValueObject &static_value) { 271 CompilerType static_type(static_value.GetCompilerType()); 272 Flags static_type_flags(static_type.GetTypeInfo()); 273 274 TypeAndOrName ret(type_and_or_name); 275 if (type_and_or_name.HasType()) { 276 // The type will always be the type of the dynamic object. If our parent's 277 // type was a pointer, then our type should be a pointer to the type of the 278 // dynamic object. If a reference, then the original type should be 279 // okay... 280 CompilerType orig_type = type_and_or_name.GetCompilerType(); 281 CompilerType corrected_type = orig_type; 282 if (static_type_flags.AllSet(eTypeIsPointer)) 283 corrected_type = orig_type.GetPointerType(); 284 else if (static_type_flags.AllSet(eTypeIsReference)) 285 corrected_type = orig_type.GetLValueReferenceType(); 286 ret.SetCompilerType(corrected_type); 287 } else { 288 // If we are here we need to adjust our dynamic type name to include the 289 // correct & or * symbol 290 std::string corrected_name(type_and_or_name.GetName().GetCString()); 291 if (static_type_flags.AllSet(eTypeIsPointer)) 292 corrected_name.append(" *"); 293 else if (static_type_flags.AllSet(eTypeIsReference)) 294 corrected_name.append(" &"); 295 // the parent type should be a correctly pointer'ed or referenc'ed type 296 ret.SetCompilerType(static_type); 297 ret.SetName(corrected_name.c_str()); 298 } 299 return ret; 300 } 301 302 // Static Functions 303 LanguageRuntime * 304 ItaniumABILanguageRuntime::CreateInstance(Process *process, 305 lldb::LanguageType language) { 306 // FIXME: We have to check the process and make sure we actually know that 307 // this process supports 308 // the Itanium ABI. 309 if (language == eLanguageTypeC_plus_plus || 310 language == eLanguageTypeC_plus_plus_03 || 311 language == eLanguageTypeC_plus_plus_11 || 312 language == eLanguageTypeC_plus_plus_14) 313 return new ItaniumABILanguageRuntime(process); 314 else 315 return nullptr; 316 } 317 318 class CommandObjectMultiwordItaniumABI_Demangle : public CommandObjectParsed { 319 public: 320 CommandObjectMultiwordItaniumABI_Demangle(CommandInterpreter &interpreter) 321 : CommandObjectParsed( 322 interpreter, "demangle", "Demangle a C++ mangled name.", 323 "language cplusplus demangle [<mangled-name> ...]") { 324 CommandArgumentEntry arg; 325 CommandArgumentData index_arg; 326 327 // Define the first (and only) variant of this arg. 328 index_arg.arg_type = eArgTypeSymbol; 329 index_arg.arg_repetition = eArgRepeatPlus; 330 331 // There is only one variant this argument could be; put it into the 332 // argument entry. 333 arg.push_back(index_arg); 334 335 // Push the data for the first argument into the m_arguments vector. 336 m_arguments.push_back(arg); 337 } 338 339 ~CommandObjectMultiwordItaniumABI_Demangle() override = default; 340 341 protected: 342 bool DoExecute(Args &command, CommandReturnObject &result) override { 343 bool demangled_any = false; 344 bool error_any = false; 345 for (auto &entry : command.entries()) { 346 if (entry.ref().empty()) 347 continue; 348 349 // the actual Mangled class should be strict about this, but on the 350 // command line if you're copying mangled names out of 'nm' on Darwin, 351 // they will come out with an extra underscore - be willing to strip this 352 // on behalf of the user. This is the moral equivalent of the -_/-n 353 // options to c++filt 354 auto name = entry.ref(); 355 if (name.startswith("__Z")) 356 name = name.drop_front(); 357 358 Mangled mangled(name); 359 if (mangled.GuessLanguage() == lldb::eLanguageTypeC_plus_plus) { 360 ConstString demangled(mangled.GetDisplayDemangledName()); 361 demangled_any = true; 362 result.AppendMessageWithFormat("%s ---> %s\n", entry.c_str(), 363 demangled.GetCString()); 364 } else { 365 error_any = true; 366 result.AppendErrorWithFormat("%s is not a valid C++ mangled name\n", 367 entry.ref().str().c_str()); 368 } 369 } 370 371 result.SetStatus( 372 error_any ? lldb::eReturnStatusFailed 373 : (demangled_any ? lldb::eReturnStatusSuccessFinishResult 374 : lldb::eReturnStatusSuccessFinishNoResult)); 375 return result.Succeeded(); 376 } 377 }; 378 379 class CommandObjectMultiwordItaniumABI : public CommandObjectMultiword { 380 public: 381 CommandObjectMultiwordItaniumABI(CommandInterpreter &interpreter) 382 : CommandObjectMultiword( 383 interpreter, "cplusplus", 384 "Commands for operating on the C++ language runtime.", 385 "cplusplus <subcommand> [<subcommand-options>]") { 386 LoadSubCommand( 387 "demangle", 388 CommandObjectSP( 389 new CommandObjectMultiwordItaniumABI_Demangle(interpreter))); 390 } 391 392 ~CommandObjectMultiwordItaniumABI() override = default; 393 }; 394 395 void ItaniumABILanguageRuntime::Initialize() { 396 PluginManager::RegisterPlugin( 397 GetPluginNameStatic(), "Itanium ABI for the C++ language", CreateInstance, 398 [](CommandInterpreter &interpreter) -> lldb::CommandObjectSP { 399 return CommandObjectSP( 400 new CommandObjectMultiwordItaniumABI(interpreter)); 401 }); 402 } 403 404 void ItaniumABILanguageRuntime::Terminate() { 405 PluginManager::UnregisterPlugin(CreateInstance); 406 } 407 408 BreakpointResolverSP ItaniumABILanguageRuntime::CreateExceptionResolver( 409 const BreakpointSP &bkpt, bool catch_bp, bool throw_bp) { 410 return CreateExceptionResolver(bkpt, catch_bp, throw_bp, false); 411 } 412 413 BreakpointResolverSP ItaniumABILanguageRuntime::CreateExceptionResolver( 414 const BreakpointSP &bkpt, bool catch_bp, bool throw_bp, 415 bool for_expressions) { 416 // One complication here is that most users DON'T want to stop at 417 // __cxa_allocate_expression, but until we can do anything better with 418 // predicting unwinding the expression parser does. So we have two forms of 419 // the exception breakpoints, one for expressions that leaves out 420 // __cxa_allocate_exception, and one that includes it. The 421 // SetExceptionBreakpoints does the latter, the CreateExceptionBreakpoint in 422 // the runtime the former. 423 static const char *g_catch_name = "__cxa_begin_catch"; 424 static const char *g_throw_name1 = "__cxa_throw"; 425 static const char *g_throw_name2 = "__cxa_rethrow"; 426 static const char *g_exception_throw_name = "__cxa_allocate_exception"; 427 std::vector<const char *> exception_names; 428 exception_names.reserve(4); 429 if (catch_bp) 430 exception_names.push_back(g_catch_name); 431 432 if (throw_bp) { 433 exception_names.push_back(g_throw_name1); 434 exception_names.push_back(g_throw_name2); 435 } 436 437 if (for_expressions) 438 exception_names.push_back(g_exception_throw_name); 439 440 BreakpointResolverSP resolver_sp(new BreakpointResolverName( 441 bkpt, exception_names.data(), exception_names.size(), 442 eFunctionNameTypeBase, eLanguageTypeUnknown, 0, eLazyBoolNo)); 443 444 return resolver_sp; 445 } 446 447 lldb::SearchFilterSP ItaniumABILanguageRuntime::CreateExceptionSearchFilter() { 448 Target &target = m_process->GetTarget(); 449 450 FileSpecList filter_modules; 451 if (target.GetArchitecture().GetTriple().getVendor() == llvm::Triple::Apple) { 452 // Limit the number of modules that are searched for these breakpoints for 453 // Apple binaries. 454 filter_modules.EmplaceBack("libc++abi.dylib"); 455 filter_modules.EmplaceBack("libSystem.B.dylib"); 456 filter_modules.EmplaceBack("libc++abi.1.0.dylib"); 457 filter_modules.EmplaceBack("libc++abi.1.dylib"); 458 } 459 return target.GetSearchFilterForModuleList(&filter_modules); 460 } 461 462 lldb::BreakpointSP ItaniumABILanguageRuntime::CreateExceptionBreakpoint( 463 bool catch_bp, bool throw_bp, bool for_expressions, bool is_internal) { 464 Target &target = m_process->GetTarget(); 465 FileSpecList filter_modules; 466 BreakpointResolverSP exception_resolver_sp = 467 CreateExceptionResolver(nullptr, catch_bp, throw_bp, for_expressions); 468 SearchFilterSP filter_sp(CreateExceptionSearchFilter()); 469 const bool hardware = false; 470 const bool resolve_indirect_functions = false; 471 return target.CreateBreakpoint(filter_sp, exception_resolver_sp, is_internal, 472 hardware, resolve_indirect_functions); 473 } 474 475 void ItaniumABILanguageRuntime::SetExceptionBreakpoints() { 476 if (!m_process) 477 return; 478 479 const bool catch_bp = false; 480 const bool throw_bp = true; 481 const bool is_internal = true; 482 const bool for_expressions = true; 483 484 // For the exception breakpoints set by the Expression parser, we'll be a 485 // little more aggressive and stop at exception allocation as well. 486 487 if (m_cxx_exception_bp_sp) { 488 m_cxx_exception_bp_sp->SetEnabled(true); 489 } else { 490 m_cxx_exception_bp_sp = CreateExceptionBreakpoint( 491 catch_bp, throw_bp, for_expressions, is_internal); 492 if (m_cxx_exception_bp_sp) 493 m_cxx_exception_bp_sp->SetBreakpointKind("c++ exception"); 494 } 495 } 496 497 void ItaniumABILanguageRuntime::ClearExceptionBreakpoints() { 498 if (!m_process) 499 return; 500 501 if (m_cxx_exception_bp_sp) { 502 m_cxx_exception_bp_sp->SetEnabled(false); 503 } 504 } 505 506 bool ItaniumABILanguageRuntime::ExceptionBreakpointsAreSet() { 507 return m_cxx_exception_bp_sp && m_cxx_exception_bp_sp->IsEnabled(); 508 } 509 510 bool ItaniumABILanguageRuntime::ExceptionBreakpointsExplainStop( 511 lldb::StopInfoSP stop_reason) { 512 if (!m_process) 513 return false; 514 515 if (!stop_reason || stop_reason->GetStopReason() != eStopReasonBreakpoint) 516 return false; 517 518 uint64_t break_site_id = stop_reason->GetValue(); 519 return m_process->GetBreakpointSiteList().BreakpointSiteContainsBreakpoint( 520 break_site_id, m_cxx_exception_bp_sp->GetID()); 521 } 522 523 ValueObjectSP ItaniumABILanguageRuntime::GetExceptionObjectForThread( 524 ThreadSP thread_sp) { 525 if (!thread_sp->SafeToCallFunctions()) 526 return {}; 527 528 TypeSystemClangSP scratch_ts_sp = 529 ScratchTypeSystemClang::GetForTarget(m_process->GetTarget()); 530 if (!scratch_ts_sp) 531 return {}; 532 533 CompilerType voidstar = 534 scratch_ts_sp->GetBasicType(eBasicTypeVoid).GetPointerType(); 535 536 DiagnosticManager diagnostics; 537 ExecutionContext exe_ctx; 538 EvaluateExpressionOptions options; 539 540 options.SetUnwindOnError(true); 541 options.SetIgnoreBreakpoints(true); 542 options.SetStopOthers(true); 543 options.SetTimeout(m_process->GetUtilityExpressionTimeout()); 544 options.SetTryAllThreads(false); 545 thread_sp->CalculateExecutionContext(exe_ctx); 546 547 const ModuleList &modules = m_process->GetTarget().GetImages(); 548 SymbolContextList contexts; 549 SymbolContext context; 550 551 modules.FindSymbolsWithNameAndType( 552 ConstString("__cxa_current_exception_type"), eSymbolTypeCode, contexts); 553 contexts.GetContextAtIndex(0, context); 554 if (!context.symbol) { 555 return {}; 556 } 557 Address addr = context.symbol->GetAddress(); 558 559 Status error; 560 FunctionCaller *function_caller = 561 m_process->GetTarget().GetFunctionCallerForLanguage( 562 eLanguageTypeC, voidstar, addr, ValueList(), "caller", error); 563 564 ExpressionResults func_call_ret; 565 Value results; 566 func_call_ret = function_caller->ExecuteFunction(exe_ctx, nullptr, options, 567 diagnostics, results); 568 if (func_call_ret != eExpressionCompleted || !error.Success()) { 569 return ValueObjectSP(); 570 } 571 572 size_t ptr_size = m_process->GetAddressByteSize(); 573 addr_t result_ptr = results.GetScalar().ULongLong(LLDB_INVALID_ADDRESS); 574 addr_t exception_addr = 575 m_process->ReadPointerFromMemory(result_ptr - ptr_size, error); 576 577 if (!error.Success()) { 578 return ValueObjectSP(); 579 } 580 581 lldb_private::formatters::InferiorSizedWord exception_isw(exception_addr, 582 *m_process); 583 ValueObjectSP exception = ValueObject::CreateValueObjectFromData( 584 "exception", exception_isw.GetAsData(m_process->GetByteOrder()), exe_ctx, 585 voidstar); 586 ValueObjectSP dyn_exception 587 = exception->GetDynamicValue(eDynamicDontRunTarget); 588 // If we succeed in making a dynamic value, return that: 589 if (dyn_exception) 590 return dyn_exception; 591 592 return exception; 593 } 594 595 TypeAndOrName ItaniumABILanguageRuntime::GetDynamicTypeInfo( 596 const lldb_private::Address &vtable_addr) { 597 std::lock_guard<std::mutex> locker(m_dynamic_type_map_mutex); 598 DynamicTypeCache::const_iterator pos = m_dynamic_type_map.find(vtable_addr); 599 if (pos == m_dynamic_type_map.end()) 600 return TypeAndOrName(); 601 else 602 return pos->second; 603 } 604 605 void ItaniumABILanguageRuntime::SetDynamicTypeInfo( 606 const lldb_private::Address &vtable_addr, const TypeAndOrName &type_info) { 607 std::lock_guard<std::mutex> locker(m_dynamic_type_map_mutex); 608 m_dynamic_type_map[vtable_addr] = type_info; 609 } 610