1//===-- AppleObjCRuntime.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 "AppleObjCRuntime.h" 10#include "AppleObjCRuntimeV1.h" 11#include "AppleObjCRuntimeV2.h" 12#include "AppleObjCTrampolineHandler.h" 13#include "Plugins/Language/ObjC/NSString.h" 14#include "Plugins/LanguageRuntime/CPlusPlus/CPPLanguageRuntime.h" 15#include "Plugins/Process/Utility/HistoryThread.h" 16#include "lldb/Breakpoint/BreakpointLocation.h" 17#include "lldb/Core/Module.h" 18#include "lldb/Core/ModuleList.h" 19#include "lldb/Core/PluginManager.h" 20#include "lldb/Core/Section.h" 21#include "lldb/Core/ValueObject.h" 22#include "lldb/Core/ValueObjectConstResult.h" 23#include "lldb/DataFormatters/FormattersHelpers.h" 24#include "lldb/Expression/DiagnosticManager.h" 25#include "lldb/Expression/FunctionCaller.h" 26#include "lldb/Symbol/ObjectFile.h" 27#include "lldb/Target/ExecutionContext.h" 28#include "lldb/Target/Process.h" 29#include "lldb/Target/RegisterContext.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#include "lldb/Utility/StreamString.h" 39#include "clang/AST/Type.h" 40 41#include "Plugins/TypeSystem/Clang/TypeSystemClang.h" 42 43#include <vector> 44 45using namespace lldb; 46using namespace lldb_private; 47 48LLDB_PLUGIN_DEFINE(AppleObjCRuntime) 49 50char AppleObjCRuntime::ID = 0; 51 52AppleObjCRuntime::~AppleObjCRuntime() = default; 53 54AppleObjCRuntime::AppleObjCRuntime(Process *process) 55 : ObjCLanguageRuntime(process), m_read_objc_library(false), 56 m_objc_trampoline_handler_up(), m_Foundation_major() { 57 ReadObjCLibraryIfNeeded(process->GetTarget().GetImages()); 58} 59 60void AppleObjCRuntime::Initialize() { 61 AppleObjCRuntimeV2::Initialize(); 62 AppleObjCRuntimeV1::Initialize(); 63} 64 65void AppleObjCRuntime::Terminate() { 66 AppleObjCRuntimeV2::Terminate(); 67 AppleObjCRuntimeV1::Terminate(); 68} 69 70bool AppleObjCRuntime::GetObjectDescription(Stream &str, ValueObject &valobj) { 71 CompilerType compiler_type(valobj.GetCompilerType()); 72 bool is_signed; 73 // ObjC objects can only be pointers (or numbers that actually represents 74 // pointers but haven't been typecast, because reasons..) 75 if (!compiler_type.IsIntegerType(is_signed) && !compiler_type.IsPointerType()) 76 return false; 77 78 // Make the argument list: we pass one arg, the address of our pointer, to 79 // the print function. 80 Value val; 81 82 if (!valobj.ResolveValue(val.GetScalar())) 83 return false; 84 85 // Value Objects may not have a process in their ExecutionContextRef. But we 86 // need to have one in the ref we pass down to eventually call description. 87 // Get it from the target if it isn't present. 88 ExecutionContext exe_ctx; 89 if (valobj.GetProcessSP()) { 90 exe_ctx = ExecutionContext(valobj.GetExecutionContextRef()); 91 } else { 92 exe_ctx.SetContext(valobj.GetTargetSP(), true); 93 if (!exe_ctx.HasProcessScope()) 94 return false; 95 } 96 return GetObjectDescription(str, val, exe_ctx.GetBestExecutionContextScope()); 97} 98bool AppleObjCRuntime::GetObjectDescription(Stream &strm, Value &value, 99 ExecutionContextScope *exe_scope) { 100 if (!m_read_objc_library) 101 return false; 102 103 ExecutionContext exe_ctx; 104 exe_scope->CalculateExecutionContext(exe_ctx); 105 Process *process = exe_ctx.GetProcessPtr(); 106 if (!process) 107 return false; 108 109 // We need other parts of the exe_ctx, but the processes have to match. 110 assert(m_process == process); 111 112 // Get the function address for the print function. 113 const Address *function_address = GetPrintForDebuggerAddr(); 114 if (!function_address) 115 return false; 116 117 Target *target = exe_ctx.GetTargetPtr(); 118 CompilerType compiler_type = value.GetCompilerType(); 119 if (compiler_type) { 120 if (!TypeSystemClang::IsObjCObjectPointerType(compiler_type)) { 121 strm.Printf("Value doesn't point to an ObjC object.\n"); 122 return false; 123 } 124 } else { 125 // If it is not a pointer, see if we can make it into a pointer. 126 TypeSystemClangSP scratch_ts_sp = 127 ScratchTypeSystemClang::GetForTarget(*target); 128 if (!scratch_ts_sp) 129 return false; 130 131 CompilerType opaque_type = scratch_ts_sp->GetBasicType(eBasicTypeObjCID); 132 if (!opaque_type) 133 opaque_type = scratch_ts_sp->GetBasicType(eBasicTypeVoid).GetPointerType(); 134 // value.SetContext(Value::eContextTypeClangType, opaque_type_ptr); 135 value.SetCompilerType(opaque_type); 136 } 137 138 ValueList arg_value_list; 139 arg_value_list.PushValue(value); 140 141 // This is the return value: 142 TypeSystemClangSP scratch_ts_sp = 143 ScratchTypeSystemClang::GetForTarget(*target); 144 if (!scratch_ts_sp) 145 return false; 146 147 CompilerType return_compiler_type = scratch_ts_sp->GetCStringType(true); 148 Value ret; 149 // ret.SetContext(Value::eContextTypeClangType, return_compiler_type); 150 ret.SetCompilerType(return_compiler_type); 151 152 if (exe_ctx.GetFramePtr() == nullptr) { 153 Thread *thread = exe_ctx.GetThreadPtr(); 154 if (thread == nullptr) { 155 exe_ctx.SetThreadSP(process->GetThreadList().GetSelectedThread()); 156 thread = exe_ctx.GetThreadPtr(); 157 } 158 if (thread) { 159 exe_ctx.SetFrameSP(thread->GetSelectedFrame(DoNoSelectMostRelevantFrame)); 160 } 161 } 162 163 // Now we're ready to call the function: 164 165 DiagnosticManager diagnostics; 166 lldb::addr_t wrapper_struct_addr = LLDB_INVALID_ADDRESS; 167 168 if (!m_print_object_caller_up) { 169 Status error; 170 m_print_object_caller_up.reset( 171 exe_scope->CalculateTarget()->GetFunctionCallerForLanguage( 172 eLanguageTypeObjC, return_compiler_type, *function_address, 173 arg_value_list, "objc-object-description", error)); 174 if (error.Fail()) { 175 m_print_object_caller_up.reset(); 176 strm.Printf("Could not get function runner to call print for debugger " 177 "function: %s.", 178 error.AsCString()); 179 return false; 180 } 181 m_print_object_caller_up->InsertFunction(exe_ctx, wrapper_struct_addr, 182 diagnostics); 183 } else { 184 m_print_object_caller_up->WriteFunctionArguments( 185 exe_ctx, wrapper_struct_addr, arg_value_list, diagnostics); 186 } 187 188 EvaluateExpressionOptions options; 189 options.SetUnwindOnError(true); 190 options.SetTryAllThreads(true); 191 options.SetStopOthers(true); 192 options.SetIgnoreBreakpoints(true); 193 options.SetTimeout(process->GetUtilityExpressionTimeout()); 194 options.SetIsForUtilityExpr(true); 195 196 ExpressionResults results = m_print_object_caller_up->ExecuteFunction( 197 exe_ctx, &wrapper_struct_addr, options, diagnostics, ret); 198 if (results != eExpressionCompleted) { 199 strm.Printf("Error evaluating Print Object function: %d.\n", results); 200 return false; 201 } 202 203 addr_t result_ptr = ret.GetScalar().ULongLong(LLDB_INVALID_ADDRESS); 204 205 char buf[512]; 206 size_t cstr_len = 0; 207 size_t full_buffer_len = sizeof(buf) - 1; 208 size_t curr_len = full_buffer_len; 209 while (curr_len == full_buffer_len) { 210 Status error; 211 curr_len = process->ReadCStringFromMemory(result_ptr + cstr_len, buf, 212 sizeof(buf), error); 213 strm.Write(buf, curr_len); 214 cstr_len += curr_len; 215 } 216 return cstr_len > 0; 217} 218 219lldb::ModuleSP AppleObjCRuntime::GetObjCModule() { 220 ModuleSP module_sp(m_objc_module_wp.lock()); 221 if (module_sp) 222 return module_sp; 223 224 Process *process = GetProcess(); 225 if (process) { 226 const ModuleList &modules = process->GetTarget().GetImages(); 227 for (uint32_t idx = 0; idx < modules.GetSize(); idx++) { 228 module_sp = modules.GetModuleAtIndex(idx); 229 if (AppleObjCRuntime::AppleIsModuleObjCLibrary(module_sp)) { 230 m_objc_module_wp = module_sp; 231 return module_sp; 232 } 233 } 234 } 235 return ModuleSP(); 236} 237 238Address *AppleObjCRuntime::GetPrintForDebuggerAddr() { 239 if (!m_PrintForDebugger_addr) { 240 const ModuleList &modules = m_process->GetTarget().GetImages(); 241 242 SymbolContextList contexts; 243 SymbolContext context; 244 245 modules.FindSymbolsWithNameAndType(ConstString("_NSPrintForDebugger"), 246 eSymbolTypeCode, contexts); 247 if (contexts.IsEmpty()) { 248 modules.FindSymbolsWithNameAndType(ConstString("_CFPrintForDebugger"), 249 eSymbolTypeCode, contexts); 250 if (contexts.IsEmpty()) 251 return nullptr; 252 } 253 254 contexts.GetContextAtIndex(0, context); 255 256 m_PrintForDebugger_addr = 257 std::make_unique<Address>(context.symbol->GetAddress()); 258 } 259 260 return m_PrintForDebugger_addr.get(); 261} 262 263bool AppleObjCRuntime::CouldHaveDynamicValue(ValueObject &in_value) { 264 return in_value.GetCompilerType().IsPossibleDynamicType( 265 nullptr, 266 false, // do not check C++ 267 true); // check ObjC 268} 269 270bool AppleObjCRuntime::GetDynamicTypeAndAddress( 271 ValueObject &in_value, lldb::DynamicValueType use_dynamic, 272 TypeAndOrName &class_type_or_name, Address &address, 273 Value::ValueType &value_type) { 274 return false; 275} 276 277TypeAndOrName 278AppleObjCRuntime::FixUpDynamicType(const TypeAndOrName &type_and_or_name, 279 ValueObject &static_value) { 280 CompilerType static_type(static_value.GetCompilerType()); 281 Flags static_type_flags(static_type.GetTypeInfo()); 282 283 TypeAndOrName ret(type_and_or_name); 284 if (type_and_or_name.HasType()) { 285 // The type will always be the type of the dynamic object. If our parent's 286 // type was a pointer, then our type should be a pointer to the type of the 287 // dynamic object. If a reference, then the original type should be 288 // okay... 289 CompilerType orig_type = type_and_or_name.GetCompilerType(); 290 CompilerType corrected_type = orig_type; 291 if (static_type_flags.AllSet(eTypeIsPointer)) 292 corrected_type = orig_type.GetPointerType(); 293 ret.SetCompilerType(corrected_type); 294 } else { 295 // If we are here we need to adjust our dynamic type name to include the 296 // correct & or * symbol 297 std::string corrected_name(type_and_or_name.GetName().GetCString()); 298 if (static_type_flags.AllSet(eTypeIsPointer)) 299 corrected_name.append(" *"); 300 // the parent type should be a correctly pointer'ed or referenc'ed type 301 ret.SetCompilerType(static_type); 302 ret.SetName(corrected_name.c_str()); 303 } 304 return ret; 305} 306 307bool AppleObjCRuntime::AppleIsModuleObjCLibrary(const ModuleSP &module_sp) { 308 if (module_sp) { 309 const FileSpec &module_file_spec = module_sp->GetFileSpec(); 310 static ConstString ObjCName("libobjc.A.dylib"); 311 312 if (module_file_spec) { 313 if (module_file_spec.GetFilename() == ObjCName) 314 return true; 315 } 316 } 317 return false; 318} 319 320// we use the version of Foundation to make assumptions about the ObjC runtime 321// on a target 322uint32_t AppleObjCRuntime::GetFoundationVersion() { 323 if (!m_Foundation_major) { 324 const ModuleList &modules = m_process->GetTarget().GetImages(); 325 for (uint32_t idx = 0; idx < modules.GetSize(); idx++) { 326 lldb::ModuleSP module_sp = modules.GetModuleAtIndex(idx); 327 if (!module_sp) 328 continue; 329 if (strcmp(module_sp->GetFileSpec().GetFilename().AsCString(""), 330 "Foundation") == 0) { 331 m_Foundation_major = module_sp->GetVersion().getMajor(); 332 return *m_Foundation_major; 333 } 334 } 335 return LLDB_INVALID_MODULE_VERSION; 336 } else 337 return *m_Foundation_major; 338} 339 340void AppleObjCRuntime::GetValuesForGlobalCFBooleans(lldb::addr_t &cf_true, 341 lldb::addr_t &cf_false) { 342 cf_true = cf_false = LLDB_INVALID_ADDRESS; 343} 344 345bool AppleObjCRuntime::IsModuleObjCLibrary(const ModuleSP &module_sp) { 346 return AppleIsModuleObjCLibrary(module_sp); 347} 348 349bool AppleObjCRuntime::ReadObjCLibrary(const ModuleSP &module_sp) { 350 // Maybe check here and if we have a handler already, and the UUID of this 351 // module is the same as the one in the current module, then we don't have to 352 // reread it? 353 m_objc_trampoline_handler_up = std::make_unique<AppleObjCTrampolineHandler>( 354 m_process->shared_from_this(), module_sp); 355 if (m_objc_trampoline_handler_up != nullptr) { 356 m_read_objc_library = true; 357 return true; 358 } else 359 return false; 360} 361 362ThreadPlanSP AppleObjCRuntime::GetStepThroughTrampolinePlan(Thread &thread, 363 bool stop_others) { 364 ThreadPlanSP thread_plan_sp; 365 if (m_objc_trampoline_handler_up) 366 thread_plan_sp = m_objc_trampoline_handler_up->GetStepThroughDispatchPlan( 367 thread, stop_others); 368 return thread_plan_sp; 369} 370 371// Static Functions 372ObjCLanguageRuntime::ObjCRuntimeVersions 373AppleObjCRuntime::GetObjCVersion(Process *process, ModuleSP &objc_module_sp) { 374 if (!process) 375 return ObjCRuntimeVersions::eObjC_VersionUnknown; 376 377 Target &target = process->GetTarget(); 378 if (target.GetArchitecture().GetTriple().getVendor() != 379 llvm::Triple::VendorType::Apple) 380 return ObjCRuntimeVersions::eObjC_VersionUnknown; 381 382 for (ModuleSP module_sp : target.GetImages().Modules()) { 383 // One tricky bit here is that we might get called as part of the initial 384 // module loading, but before all the pre-run libraries get winnowed from 385 // the module list. So there might actually be an old and incorrect ObjC 386 // library sitting around in the list, and we don't want to look at that. 387 // That's why we call IsLoadedInTarget. 388 389 if (AppleIsModuleObjCLibrary(module_sp) && 390 module_sp->IsLoadedInTarget(&target)) { 391 objc_module_sp = module_sp; 392 ObjectFile *ofile = module_sp->GetObjectFile(); 393 if (!ofile) 394 return ObjCRuntimeVersions::eObjC_VersionUnknown; 395 396 SectionList *sections = module_sp->GetSectionList(); 397 if (!sections) 398 return ObjCRuntimeVersions::eObjC_VersionUnknown; 399 SectionSP v1_telltale_section_sp = 400 sections->FindSectionByName(ConstString("__OBJC")); 401 if (v1_telltale_section_sp) { 402 return ObjCRuntimeVersions::eAppleObjC_V1; 403 } 404 return ObjCRuntimeVersions::eAppleObjC_V2; 405 } 406 } 407 408 return ObjCRuntimeVersions::eObjC_VersionUnknown; 409} 410 411void AppleObjCRuntime::SetExceptionBreakpoints() { 412 const bool catch_bp = false; 413 const bool throw_bp = true; 414 const bool is_internal = true; 415 416 if (!m_objc_exception_bp_sp) { 417 m_objc_exception_bp_sp = LanguageRuntime::CreateExceptionBreakpoint( 418 m_process->GetTarget(), GetLanguageType(), catch_bp, throw_bp, 419 is_internal); 420 if (m_objc_exception_bp_sp) 421 m_objc_exception_bp_sp->SetBreakpointKind("ObjC exception"); 422 } else 423 m_objc_exception_bp_sp->SetEnabled(true); 424} 425 426void AppleObjCRuntime::ClearExceptionBreakpoints() { 427 if (!m_process) 428 return; 429 430 if (m_objc_exception_bp_sp.get()) { 431 m_objc_exception_bp_sp->SetEnabled(false); 432 } 433} 434 435bool AppleObjCRuntime::ExceptionBreakpointsAreSet() { 436 return m_objc_exception_bp_sp && m_objc_exception_bp_sp->IsEnabled(); 437} 438 439bool AppleObjCRuntime::ExceptionBreakpointsExplainStop( 440 lldb::StopInfoSP stop_reason) { 441 if (!m_process) 442 return false; 443 444 if (!stop_reason || stop_reason->GetStopReason() != eStopReasonBreakpoint) 445 return false; 446 447 uint64_t break_site_id = stop_reason->GetValue(); 448 return m_process->GetBreakpointSiteList().StopPointSiteContainsBreakpoint( 449 break_site_id, m_objc_exception_bp_sp->GetID()); 450} 451 452bool AppleObjCRuntime::CalculateHasNewLiteralsAndIndexing() { 453 if (!m_process) 454 return false; 455 456 Target &target(m_process->GetTarget()); 457 458 static ConstString s_method_signature( 459 "-[NSDictionary objectForKeyedSubscript:]"); 460 static ConstString s_arclite_method_signature( 461 "__arclite_objectForKeyedSubscript"); 462 463 SymbolContextList sc_list; 464 465 target.GetImages().FindSymbolsWithNameAndType(s_method_signature, 466 eSymbolTypeCode, sc_list); 467 if (sc_list.IsEmpty()) 468 target.GetImages().FindSymbolsWithNameAndType(s_arclite_method_signature, 469 eSymbolTypeCode, sc_list); 470 return !sc_list.IsEmpty(); 471} 472 473lldb::SearchFilterSP AppleObjCRuntime::CreateExceptionSearchFilter() { 474 Target &target = m_process->GetTarget(); 475 476 FileSpecList filter_modules; 477 if (target.GetArchitecture().GetTriple().getVendor() == llvm::Triple::Apple) { 478 filter_modules.Append(std::get<0>(GetExceptionThrowLocation())); 479 } 480 return target.GetSearchFilterForModuleList(&filter_modules); 481} 482 483ValueObjectSP AppleObjCRuntime::GetExceptionObjectForThread( 484 ThreadSP thread_sp) { 485 auto *cpp_runtime = m_process->GetLanguageRuntime(eLanguageTypeC_plus_plus); 486 if (!cpp_runtime) return ValueObjectSP(); 487 auto cpp_exception = cpp_runtime->GetExceptionObjectForThread(thread_sp); 488 if (!cpp_exception) return ValueObjectSP(); 489 490 auto descriptor = GetClassDescriptor(*cpp_exception); 491 if (!descriptor || !descriptor->IsValid()) return ValueObjectSP(); 492 493 while (descriptor) { 494 ConstString class_name(descriptor->GetClassName()); 495 if (class_name == "NSException") 496 return cpp_exception; 497 descriptor = descriptor->GetSuperclass(); 498 } 499 500 return ValueObjectSP(); 501} 502 503/// Utility method for error handling in GetBacktraceThreadFromException. 504/// \param msg The message to add to the log. 505/// \return An invalid ThreadSP to be returned from 506/// GetBacktraceThreadFromException. 507[[nodiscard]] 508static ThreadSP FailExceptionParsing(llvm::StringRef msg) { 509 Log *log = GetLog(LLDBLog::Language); 510 LLDB_LOG(log, "Failed getting backtrace from exception: {0}", msg); 511 return ThreadSP(); 512} 513 514ThreadSP AppleObjCRuntime::GetBacktraceThreadFromException( 515 lldb::ValueObjectSP exception_sp) { 516 ValueObjectSP reserved_dict = 517 exception_sp->GetChildMemberWithName("reserved"); 518 if (!reserved_dict) 519 return FailExceptionParsing("Failed to get 'reserved' member."); 520 521 reserved_dict = reserved_dict->GetSyntheticValue(); 522 if (!reserved_dict) 523 return FailExceptionParsing("Failed to get synthetic value."); 524 525 TypeSystemClangSP scratch_ts_sp = 526 ScratchTypeSystemClang::GetForTarget(*exception_sp->GetTargetSP()); 527 if (!scratch_ts_sp) 528 return FailExceptionParsing("Failed to get scratch AST."); 529 CompilerType objc_id = scratch_ts_sp->GetBasicType(lldb::eBasicTypeObjCID); 530 ValueObjectSP return_addresses; 531 532 auto objc_object_from_address = [&exception_sp, &objc_id](uint64_t addr, 533 const char *name) { 534 Value value(addr); 535 value.SetCompilerType(objc_id); 536 auto object = ValueObjectConstResult::Create( 537 exception_sp->GetTargetSP().get(), value, ConstString(name)); 538 object = object->GetDynamicValue(eDynamicDontRunTarget); 539 return object; 540 }; 541 542 for (size_t idx = 0; idx < reserved_dict->GetNumChildren(); idx++) { 543 ValueObjectSP dict_entry = reserved_dict->GetChildAtIndex(idx); 544 545 DataExtractor data; 546 data.SetAddressByteSize(dict_entry->GetProcessSP()->GetAddressByteSize()); 547 Status error; 548 dict_entry->GetData(data, error); 549 if (error.Fail()) return ThreadSP(); 550 551 lldb::offset_t data_offset = 0; 552 auto dict_entry_key = data.GetAddress(&data_offset); 553 auto dict_entry_value = data.GetAddress(&data_offset); 554 555 auto key_nsstring = objc_object_from_address(dict_entry_key, "key"); 556 StreamString key_summary; 557 if (lldb_private::formatters::NSStringSummaryProvider( 558 *key_nsstring, key_summary, TypeSummaryOptions()) && 559 !key_summary.Empty()) { 560 if (key_summary.GetString() == "\"callStackReturnAddresses\"") { 561 return_addresses = objc_object_from_address(dict_entry_value, 562 "callStackReturnAddresses"); 563 break; 564 } 565 } 566 } 567 568 if (!return_addresses) 569 return FailExceptionParsing("Failed to get return addresses."); 570 auto frames_value = return_addresses->GetChildMemberWithName("_frames"); 571 if (!frames_value) 572 return FailExceptionParsing("Failed to get frames_value."); 573 addr_t frames_addr = frames_value->GetValueAsUnsigned(0); 574 auto count_value = return_addresses->GetChildMemberWithName("_cnt"); 575 if (!count_value) 576 return FailExceptionParsing("Failed to get count_value."); 577 size_t count = count_value->GetValueAsUnsigned(0); 578 auto ignore_value = return_addresses->GetChildMemberWithName("_ignore"); 579 if (!ignore_value) 580 return FailExceptionParsing("Failed to get ignore_value."); 581 size_t ignore = ignore_value->GetValueAsUnsigned(0); 582 583 size_t ptr_size = m_process->GetAddressByteSize(); 584 std::vector<lldb::addr_t> pcs; 585 for (size_t idx = 0; idx < count; idx++) { 586 Status error; 587 addr_t pc = m_process->ReadPointerFromMemory( 588 frames_addr + (ignore + idx) * ptr_size, error); 589 pcs.push_back(pc); 590 } 591 592 if (pcs.empty()) 593 return FailExceptionParsing("Failed to get PC list."); 594 595 ThreadSP new_thread_sp(new HistoryThread(*m_process, 0, pcs)); 596 m_process->GetExtendedThreadList().AddThread(new_thread_sp); 597 return new_thread_sp; 598} 599 600std::tuple<FileSpec, ConstString> 601AppleObjCRuntime::GetExceptionThrowLocation() { 602 return std::make_tuple( 603 FileSpec("libobjc.A.dylib"), ConstString("objc_exception_throw")); 604} 605 606void AppleObjCRuntime::ReadObjCLibraryIfNeeded(const ModuleList &module_list) { 607 if (!HasReadObjCLibrary()) { 608 std::lock_guard<std::recursive_mutex> guard(module_list.GetMutex()); 609 610 size_t num_modules = module_list.GetSize(); 611 for (size_t i = 0; i < num_modules; i++) { 612 auto mod = module_list.GetModuleAtIndex(i); 613 if (IsModuleObjCLibrary(mod)) { 614 ReadObjCLibrary(mod); 615 break; 616 } 617 } 618 } 619} 620 621void AppleObjCRuntime::ModulesDidLoad(const ModuleList &module_list) { 622 ReadObjCLibraryIfNeeded(module_list); 623} 624