1 //===-- ItaniumABILanguageRuntime.cpp --------------------------------------*- 2 //C++ -*-===// 3 // 4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5 // See https://llvm.org/LICENSE.txt for license information. 6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "ItaniumABILanguageRuntime.h" 11 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/ClangASTContext.h" 25 #include "lldb/Symbol/Symbol.h" 26 #include "lldb/Symbol/SymbolFile.h" 27 #include "lldb/Symbol/TypeList.h" 28 #include "lldb/Target/Process.h" 29 #include "lldb/Target/RegisterContext.h" 30 #include "lldb/Target/SectionLoadList.h" 31 #include "lldb/Target/StopInfo.h" 32 #include "lldb/Target/Target.h" 33 #include "lldb/Target/Thread.h" 34 #include "lldb/Utility/ConstString.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 static const char *vtable_demangled_prefix = "vtable for "; 45 46 bool ItaniumABILanguageRuntime::CouldHaveDynamicValue(ValueObject &in_value) { 47 const bool check_cxx = true; 48 const bool check_objc = false; 49 return in_value.GetCompilerType().IsPossibleDynamicType(NULL, check_cxx, 50 check_objc); 51 } 52 53 TypeAndOrName ItaniumABILanguageRuntime::GetTypeInfoFromVTableAddress( 54 ValueObject &in_value, lldb::addr_t original_ptr, 55 lldb::addr_t vtable_load_addr) { 56 if (m_process && vtable_load_addr != LLDB_INVALID_ADDRESS) { 57 // Find the symbol that contains the "vtable_load_addr" address 58 Address vtable_addr; 59 Target &target = m_process->GetTarget(); 60 if (!target.GetSectionLoadList().IsEmpty()) { 61 if (target.GetSectionLoadList().ResolveLoadAddress(vtable_load_addr, 62 vtable_addr)) { 63 // See if we have cached info for this type already 64 TypeAndOrName type_info = GetDynamicTypeInfo(vtable_addr); 65 if (type_info) 66 return type_info; 67 68 SymbolContext sc; 69 target.GetImages().ResolveSymbolContextForAddress( 70 vtable_addr, eSymbolContextSymbol, sc); 71 Symbol *symbol = sc.symbol; 72 if (symbol != NULL) { 73 const char *name = 74 symbol->GetMangled() 75 .GetDemangledName(lldb::eLanguageTypeC_plus_plus) 76 .AsCString(); 77 if (name && strstr(name, vtable_demangled_prefix) == name) { 78 Log *log( 79 lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_OBJECT)); 80 if (log) 81 log->Printf("0x%16.16" PRIx64 82 ": static-type = '%s' has vtable symbol '%s'\n", 83 original_ptr, in_value.GetTypeName().GetCString(), 84 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 uint32_t num_matches = 0; 98 // First look in the module that the vtable symbol came from and 99 // look for a single exact match. 100 llvm::DenseSet<SymbolFile *> searched_symbol_files; 101 if (sc.module_sp) { 102 num_matches = sc.module_sp->FindTypes( 103 ConstString(lookup_name), exact_match, 1, 104 searched_symbol_files, class_types); 105 } 106 107 // If we didn't find a symbol, then move on to the entire module 108 // list in the target and get as many unique matches as possible 109 if (num_matches == 0) { 110 num_matches = target.GetImages().FindTypes( 111 nullptr, ConstString(lookup_name), exact_match, UINT32_MAX, 112 searched_symbol_files, class_types); 113 } 114 115 lldb::TypeSP type_sp; 116 if (num_matches == 0) { 117 if (log) 118 log->Printf("0x%16.16" PRIx64 ": is not dynamic\n", 119 original_ptr); 120 return TypeAndOrName(); 121 } 122 if (num_matches == 1) { 123 type_sp = class_types.GetTypeAtIndex(0); 124 if (type_sp) { 125 if (ClangASTContext::IsCXXClassType( 126 type_sp->GetForwardCompilerType())) { 127 if (log) 128 log->Printf( 129 "0x%16.16" PRIx64 130 ": static-type = '%s' has dynamic type: uid={0x%" PRIx64 131 "}, type-name='%s'\n", 132 original_ptr, in_value.GetTypeName().AsCString(), 133 type_sp->GetID(), type_sp->GetName().GetCString()); 134 type_info.SetTypeSP(type_sp); 135 } 136 } 137 } else if (num_matches > 1) { 138 size_t i; 139 if (log) { 140 for (i = 0; i < num_matches; i++) { 141 type_sp = class_types.GetTypeAtIndex(i); 142 if (type_sp) { 143 if (log) 144 log->Printf( 145 "0x%16.16" PRIx64 146 ": static-type = '%s' has multiple matching dynamic " 147 "types: uid={0x%" PRIx64 "}, type-name='%s'\n", 148 original_ptr, in_value.GetTypeName().AsCString(), 149 type_sp->GetID(), type_sp->GetName().GetCString()); 150 } 151 } 152 } 153 154 for (i = 0; i < num_matches; i++) { 155 type_sp = class_types.GetTypeAtIndex(i); 156 if (type_sp) { 157 if (ClangASTContext::IsCXXClassType( 158 type_sp->GetForwardCompilerType())) { 159 if (log) 160 log->Printf( 161 "0x%16.16" PRIx64 ": static-type = '%s' has multiple " 162 "matching dynamic types, picking " 163 "this one: uid={0x%" PRIx64 164 "}, type-name='%s'\n", 165 original_ptr, in_value.GetTypeName().AsCString(), 166 type_sp->GetID(), type_sp->GetName().GetCString()); 167 type_info.SetTypeSP(type_sp); 168 } 169 } 170 } 171 172 if (log && i == num_matches) { 173 log->Printf( 174 "0x%16.16" PRIx64 175 ": static-type = '%s' has multiple matching dynamic " 176 "types, didn't find a C++ match\n", 177 original_ptr, in_value.GetTypeName().AsCString()); 178 } 179 } 180 if (type_info) 181 SetDynamicTypeInfo(vtable_addr, type_info); 182 return type_info; 183 } 184 } 185 } 186 } 187 } 188 return TypeAndOrName(); 189 } 190 191 bool ItaniumABILanguageRuntime::GetDynamicTypeAndAddress( 192 ValueObject &in_value, lldb::DynamicValueType use_dynamic, 193 TypeAndOrName &class_type_or_name, Address &dynamic_address, 194 Value::ValueType &value_type) { 195 // For Itanium, if the type has a vtable pointer in the object, it will be at 196 // offset 0 in the object. That will point to the "address point" within the 197 // vtable (not the beginning of the vtable.) We can then look up the symbol 198 // containing this "address point" and that symbol's name demangled will 199 // contain the full class name. The second pointer above the "address point" 200 // is the "offset_to_top". We'll use that to get the start of the value 201 // object which holds the dynamic type. 202 // 203 204 class_type_or_name.Clear(); 205 value_type = Value::ValueType::eValueTypeScalar; 206 207 // Only a pointer or reference type can have a different dynamic and static 208 // type: 209 if (!CouldHaveDynamicValue(in_value)) 210 return false; 211 212 // First job, pull out the address at 0 offset from the object. 213 AddressType address_type; 214 lldb::addr_t original_ptr = in_value.GetPointerValue(&address_type); 215 if (original_ptr == LLDB_INVALID_ADDRESS) 216 return false; 217 218 ExecutionContext exe_ctx(in_value.GetExecutionContextRef()); 219 220 Process *process = exe_ctx.GetProcessPtr(); 221 222 if (process == nullptr) 223 return false; 224 225 Status error; 226 const lldb::addr_t vtable_address_point = 227 process->ReadPointerFromMemory(original_ptr, error); 228 229 if (!error.Success() || vtable_address_point == LLDB_INVALID_ADDRESS) 230 return false; 231 232 class_type_or_name = GetTypeInfoFromVTableAddress(in_value, original_ptr, 233 vtable_address_point); 234 235 if (!class_type_or_name) 236 return false; 237 238 CompilerType type = class_type_or_name.GetCompilerType(); 239 // There can only be one type with a given name, so we've just found 240 // duplicate definitions, and this one will do as well as any other. We 241 // don't consider something to have a dynamic type if it is the same as 242 // the static type. So compare against the value we were handed. 243 if (!type) 244 return true; 245 246 if (ClangASTContext::AreTypesSame(in_value.GetCompilerType(), type)) { 247 // The dynamic type we found was the same type, so we don't have a 248 // dynamic type here... 249 return false; 250 } 251 252 // The offset_to_top is two pointers above the vtable pointer. 253 const uint32_t addr_byte_size = process->GetAddressByteSize(); 254 const lldb::addr_t offset_to_top_location = 255 vtable_address_point - 2 * addr_byte_size; 256 // Watch for underflow, offset_to_top_location should be less than 257 // vtable_address_point 258 if (offset_to_top_location >= vtable_address_point) 259 return false; 260 const int64_t offset_to_top = process->ReadSignedIntegerFromMemory( 261 offset_to_top_location, addr_byte_size, INT64_MIN, error); 262 263 if (offset_to_top == INT64_MIN) 264 return false; 265 // So the dynamic type is a value that starts at offset_to_top above 266 // the original address. 267 lldb::addr_t dynamic_addr = original_ptr + offset_to_top; 268 if (!process->GetTarget().GetSectionLoadList().ResolveLoadAddress( 269 dynamic_addr, dynamic_address)) { 270 dynamic_address.SetRawAddress(dynamic_addr); 271 } 272 return true; 273 } 274 275 TypeAndOrName ItaniumABILanguageRuntime::FixUpDynamicType( 276 const TypeAndOrName &type_and_or_name, ValueObject &static_value) { 277 CompilerType static_type(static_value.GetCompilerType()); 278 Flags static_type_flags(static_type.GetTypeInfo()); 279 280 TypeAndOrName ret(type_and_or_name); 281 if (type_and_or_name.HasType()) { 282 // The type will always be the type of the dynamic object. If our parent's 283 // type was a pointer, then our type should be a pointer to the type of the 284 // dynamic object. If a reference, then the original type should be 285 // okay... 286 CompilerType orig_type = type_and_or_name.GetCompilerType(); 287 CompilerType corrected_type = orig_type; 288 if (static_type_flags.AllSet(eTypeIsPointer)) 289 corrected_type = orig_type.GetPointerType(); 290 else if (static_type_flags.AllSet(eTypeIsReference)) 291 corrected_type = orig_type.GetLValueReferenceType(); 292 ret.SetCompilerType(corrected_type); 293 } else { 294 // If we are here we need to adjust our dynamic type name to include the 295 // correct & or * symbol 296 std::string corrected_name(type_and_or_name.GetName().GetCString()); 297 if (static_type_flags.AllSet(eTypeIsPointer)) 298 corrected_name.append(" *"); 299 else if (static_type_flags.AllSet(eTypeIsReference)) 300 corrected_name.append(" &"); 301 // the parent type should be a correctly pointer'ed or referenc'ed type 302 ret.SetCompilerType(static_type); 303 ret.SetName(corrected_name.c_str()); 304 } 305 return ret; 306 } 307 308 bool ItaniumABILanguageRuntime::IsVTableName(const char *name) { 309 if (name == NULL) 310 return false; 311 312 // Can we maybe ask Clang about this? 313 return strstr(name, "_vptr$") == name; 314 } 315 316 // Static Functions 317 LanguageRuntime * 318 ItaniumABILanguageRuntime::CreateInstance(Process *process, 319 lldb::LanguageType language) { 320 // FIXME: We have to check the process and make sure we actually know that 321 // this process supports 322 // the Itanium ABI. 323 if (language == eLanguageTypeC_plus_plus || 324 language == eLanguageTypeC_plus_plus_03 || 325 language == eLanguageTypeC_plus_plus_11 || 326 language == eLanguageTypeC_plus_plus_14) 327 return new ItaniumABILanguageRuntime(process); 328 else 329 return NULL; 330 } 331 332 class CommandObjectMultiwordItaniumABI_Demangle : public CommandObjectParsed { 333 public: 334 CommandObjectMultiwordItaniumABI_Demangle(CommandInterpreter &interpreter) 335 : CommandObjectParsed(interpreter, "demangle", 336 "Demangle a C++ mangled name.", 337 "language cplusplus demangle") { 338 CommandArgumentEntry arg; 339 CommandArgumentData index_arg; 340 341 // Define the first (and only) variant of this arg. 342 index_arg.arg_type = eArgTypeSymbol; 343 index_arg.arg_repetition = eArgRepeatPlus; 344 345 // There is only one variant this argument could be; put it into the 346 // argument entry. 347 arg.push_back(index_arg); 348 349 // Push the data for the first argument into the m_arguments vector. 350 m_arguments.push_back(arg); 351 } 352 353 ~CommandObjectMultiwordItaniumABI_Demangle() override = default; 354 355 protected: 356 bool DoExecute(Args &command, CommandReturnObject &result) override { 357 bool demangled_any = false; 358 bool error_any = false; 359 for (auto &entry : command.entries()) { 360 if (entry.ref.empty()) 361 continue; 362 363 // the actual Mangled class should be strict about this, but on the 364 // command line if you're copying mangled names out of 'nm' on Darwin, 365 // they will come out with an extra underscore - be willing to strip this 366 // on behalf of the user. This is the moral equivalent of the -_/-n 367 // options to c++filt 368 auto name = entry.ref; 369 if (name.startswith("__Z")) 370 name = name.drop_front(); 371 372 Mangled mangled(name, true); 373 if (mangled.GuessLanguage() == lldb::eLanguageTypeC_plus_plus) { 374 ConstString demangled( 375 mangled.GetDisplayDemangledName(lldb::eLanguageTypeC_plus_plus)); 376 demangled_any = true; 377 result.AppendMessageWithFormat("%s ---> %s\n", entry.ref.str().c_str(), 378 demangled.GetCString()); 379 } else { 380 error_any = true; 381 result.AppendErrorWithFormat("%s is not a valid C++ mangled name\n", 382 entry.ref.str().c_str()); 383 } 384 } 385 386 result.SetStatus( 387 error_any ? lldb::eReturnStatusFailed 388 : (demangled_any ? lldb::eReturnStatusSuccessFinishResult 389 : lldb::eReturnStatusSuccessFinishNoResult)); 390 return result.Succeeded(); 391 } 392 }; 393 394 class CommandObjectMultiwordItaniumABI : public CommandObjectMultiword { 395 public: 396 CommandObjectMultiwordItaniumABI(CommandInterpreter &interpreter) 397 : CommandObjectMultiword( 398 interpreter, "cplusplus", 399 "Commands for operating on the C++ language runtime.", 400 "cplusplus <subcommand> [<subcommand-options>]") { 401 LoadSubCommand( 402 "demangle", 403 CommandObjectSP( 404 new CommandObjectMultiwordItaniumABI_Demangle(interpreter))); 405 } 406 407 ~CommandObjectMultiwordItaniumABI() override = default; 408 }; 409 410 void ItaniumABILanguageRuntime::Initialize() { 411 PluginManager::RegisterPlugin( 412 GetPluginNameStatic(), "Itanium ABI for the C++ language", CreateInstance, 413 [](CommandInterpreter &interpreter) -> lldb::CommandObjectSP { 414 return CommandObjectSP( 415 new CommandObjectMultiwordItaniumABI(interpreter)); 416 }); 417 } 418 419 void ItaniumABILanguageRuntime::Terminate() { 420 PluginManager::UnregisterPlugin(CreateInstance); 421 } 422 423 lldb_private::ConstString ItaniumABILanguageRuntime::GetPluginNameStatic() { 424 static ConstString g_name("itanium"); 425 return g_name; 426 } 427 428 // PluginInterface protocol 429 lldb_private::ConstString ItaniumABILanguageRuntime::GetPluginName() { 430 return GetPluginNameStatic(); 431 } 432 433 uint32_t ItaniumABILanguageRuntime::GetPluginVersion() { return 1; } 434 435 BreakpointResolverSP ItaniumABILanguageRuntime::CreateExceptionResolver( 436 Breakpoint *bkpt, bool catch_bp, bool throw_bp) { 437 return CreateExceptionResolver(bkpt, catch_bp, throw_bp, false); 438 } 439 440 BreakpointResolverSP ItaniumABILanguageRuntime::CreateExceptionResolver( 441 Breakpoint *bkpt, bool catch_bp, bool throw_bp, bool for_expressions) { 442 // One complication here is that most users DON'T want to stop at 443 // __cxa_allocate_expression, but until we can do anything better with 444 // predicting unwinding the expression parser does. So we have two forms of 445 // the exception breakpoints, one for expressions that leaves out 446 // __cxa_allocate_exception, and one that includes it. The 447 // SetExceptionBreakpoints does the latter, the CreateExceptionBreakpoint in 448 // the runtime the former. 449 static const char *g_catch_name = "__cxa_begin_catch"; 450 static const char *g_throw_name1 = "__cxa_throw"; 451 static const char *g_throw_name2 = "__cxa_rethrow"; 452 static const char *g_exception_throw_name = "__cxa_allocate_exception"; 453 std::vector<const char *> exception_names; 454 exception_names.reserve(4); 455 if (catch_bp) 456 exception_names.push_back(g_catch_name); 457 458 if (throw_bp) { 459 exception_names.push_back(g_throw_name1); 460 exception_names.push_back(g_throw_name2); 461 } 462 463 if (for_expressions) 464 exception_names.push_back(g_exception_throw_name); 465 466 BreakpointResolverSP resolver_sp(new BreakpointResolverName( 467 bkpt, exception_names.data(), exception_names.size(), 468 eFunctionNameTypeBase, eLanguageTypeUnknown, 0, eLazyBoolNo)); 469 470 return resolver_sp; 471 } 472 473 lldb::SearchFilterSP ItaniumABILanguageRuntime::CreateExceptionSearchFilter() { 474 Target &target = m_process->GetTarget(); 475 476 if (target.GetArchitecture().GetTriple().getVendor() == llvm::Triple::Apple) { 477 // Limit the number of modules that are searched for these breakpoints for 478 // Apple binaries. 479 FileSpecList filter_modules; 480 filter_modules.Append(FileSpec("libc++abi.dylib")); 481 filter_modules.Append(FileSpec("libSystem.B.dylib")); 482 return target.GetSearchFilterForModuleList(&filter_modules); 483 } else { 484 return LanguageRuntime::CreateExceptionSearchFilter(); 485 } 486 } 487 488 lldb::BreakpointSP ItaniumABILanguageRuntime::CreateExceptionBreakpoint( 489 bool catch_bp, bool throw_bp, bool for_expressions, bool is_internal) { 490 Target &target = m_process->GetTarget(); 491 FileSpecList filter_modules; 492 BreakpointResolverSP exception_resolver_sp = 493 CreateExceptionResolver(NULL, catch_bp, throw_bp, for_expressions); 494 SearchFilterSP filter_sp(CreateExceptionSearchFilter()); 495 const bool hardware = false; 496 const bool resolve_indirect_functions = false; 497 return target.CreateBreakpoint(filter_sp, exception_resolver_sp, is_internal, 498 hardware, resolve_indirect_functions); 499 } 500 501 void ItaniumABILanguageRuntime::SetExceptionBreakpoints() { 502 if (!m_process) 503 return; 504 505 const bool catch_bp = false; 506 const bool throw_bp = true; 507 const bool is_internal = true; 508 const bool for_expressions = true; 509 510 // For the exception breakpoints set by the Expression parser, we'll be a 511 // little more aggressive and stop at exception allocation as well. 512 513 if (m_cxx_exception_bp_sp) { 514 m_cxx_exception_bp_sp->SetEnabled(true); 515 } else { 516 m_cxx_exception_bp_sp = CreateExceptionBreakpoint( 517 catch_bp, throw_bp, for_expressions, is_internal); 518 if (m_cxx_exception_bp_sp) 519 m_cxx_exception_bp_sp->SetBreakpointKind("c++ exception"); 520 } 521 } 522 523 void ItaniumABILanguageRuntime::ClearExceptionBreakpoints() { 524 if (!m_process) 525 return; 526 527 if (m_cxx_exception_bp_sp) { 528 m_cxx_exception_bp_sp->SetEnabled(false); 529 } 530 } 531 532 bool ItaniumABILanguageRuntime::ExceptionBreakpointsAreSet() { 533 return m_cxx_exception_bp_sp && m_cxx_exception_bp_sp->IsEnabled(); 534 } 535 536 bool ItaniumABILanguageRuntime::ExceptionBreakpointsExplainStop( 537 lldb::StopInfoSP stop_reason) { 538 if (!m_process) 539 return false; 540 541 if (!stop_reason || stop_reason->GetStopReason() != eStopReasonBreakpoint) 542 return false; 543 544 uint64_t break_site_id = stop_reason->GetValue(); 545 return m_process->GetBreakpointSiteList().BreakpointSiteContainsBreakpoint( 546 break_site_id, m_cxx_exception_bp_sp->GetID()); 547 } 548 549 ValueObjectSP ItaniumABILanguageRuntime::GetExceptionObjectForThread( 550 ThreadSP thread_sp) { 551 if (!thread_sp->SafeToCallFunctions()) 552 return {}; 553 554 ClangASTContext *clang_ast_context = 555 m_process->GetTarget().GetScratchClangASTContext(); 556 CompilerType voidstar = 557 clang_ast_context->GetBasicType(eBasicTypeVoid).GetPointerType(); 558 559 DiagnosticManager diagnostics; 560 ExecutionContext exe_ctx; 561 EvaluateExpressionOptions options; 562 563 options.SetUnwindOnError(true); 564 options.SetIgnoreBreakpoints(true); 565 options.SetStopOthers(true); 566 options.SetTimeout(m_process->GetUtilityExpressionTimeout()); 567 options.SetTryAllThreads(false); 568 thread_sp->CalculateExecutionContext(exe_ctx); 569 570 const ModuleList &modules = m_process->GetTarget().GetImages(); 571 SymbolContextList contexts; 572 SymbolContext context; 573 574 modules.FindSymbolsWithNameAndType( 575 ConstString("__cxa_current_exception_type"), eSymbolTypeCode, contexts); 576 contexts.GetContextAtIndex(0, context); 577 Address addr = context.symbol->GetAddress(); 578 579 Status error; 580 FunctionCaller *function_caller = 581 m_process->GetTarget().GetFunctionCallerForLanguage( 582 eLanguageTypeC, voidstar, addr, ValueList(), "caller", error); 583 584 ExpressionResults func_call_ret; 585 Value results; 586 func_call_ret = function_caller->ExecuteFunction(exe_ctx, nullptr, options, 587 diagnostics, results); 588 if (func_call_ret != eExpressionCompleted || !error.Success()) { 589 return ValueObjectSP(); 590 } 591 592 size_t ptr_size = m_process->GetAddressByteSize(); 593 addr_t result_ptr = results.GetScalar().ULongLong(LLDB_INVALID_ADDRESS); 594 addr_t exception_addr = 595 m_process->ReadPointerFromMemory(result_ptr - ptr_size, error); 596 597 lldb_private::formatters::InferiorSizedWord exception_isw(exception_addr, 598 *m_process); 599 ValueObjectSP exception = ValueObject::CreateValueObjectFromData( 600 "exception", exception_isw.GetAsData(m_process->GetByteOrder()), exe_ctx, 601 voidstar); 602 exception = exception->GetDynamicValue(eDynamicDontRunTarget); 603 604 return exception; 605 } 606 607 TypeAndOrName ItaniumABILanguageRuntime::GetDynamicTypeInfo( 608 const lldb_private::Address &vtable_addr) { 609 std::lock_guard<std::mutex> locker(m_dynamic_type_map_mutex); 610 DynamicTypeCache::const_iterator pos = m_dynamic_type_map.find(vtable_addr); 611 if (pos == m_dynamic_type_map.end()) 612 return TypeAndOrName(); 613 else 614 return pos->second; 615 } 616 617 void ItaniumABILanguageRuntime::SetDynamicTypeInfo( 618 const lldb_private::Address &vtable_addr, const TypeAndOrName &type_info) { 619 std::lock_guard<std::mutex> locker(m_dynamic_type_map_mutex); 620 m_dynamic_type_map[vtable_addr] = type_info; 621 } 622