1 //===-- DWARFASTParserClang.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 <cstdlib> 10 11 #include "DWARFASTParserClang.h" 12 #include "DWARFDebugInfo.h" 13 #include "DWARFDeclContext.h" 14 #include "DWARFDefines.h" 15 #include "SymbolFileDWARF.h" 16 #include "SymbolFileDWARFDebugMap.h" 17 #include "SymbolFileDWARFDwo.h" 18 #include "UniqueDWARFASTType.h" 19 20 #include "Plugins/ExpressionParser/Clang/ClangASTImporter.h" 21 #include "Plugins/ExpressionParser/Clang/ClangASTMetadata.h" 22 #include "Plugins/ExpressionParser/Clang/ClangUtil.h" 23 #include "Plugins/Language/ObjC/ObjCLanguage.h" 24 #include "lldb/Core/Module.h" 25 #include "lldb/Core/Value.h" 26 #include "lldb/Host/Host.h" 27 #include "lldb/Symbol/CompileUnit.h" 28 #include "lldb/Symbol/Function.h" 29 #include "lldb/Symbol/ObjectFile.h" 30 #include "lldb/Symbol/SymbolFile.h" 31 #include "lldb/Symbol/TypeList.h" 32 #include "lldb/Symbol/TypeMap.h" 33 #include "lldb/Target/Language.h" 34 #include "lldb/Utility/LLDBAssert.h" 35 #include "lldb/Utility/Log.h" 36 #include "lldb/Utility/StreamString.h" 37 38 #include "llvm/Demangle/Demangle.h" 39 40 #include "clang/AST/CXXInheritance.h" 41 #include "clang/AST/DeclCXX.h" 42 #include "clang/AST/DeclObjC.h" 43 #include "clang/AST/DeclTemplate.h" 44 45 #include <map> 46 #include <memory> 47 #include <vector> 48 49 //#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN 50 51 #ifdef ENABLE_DEBUG_PRINTF 52 #include <cstdio> 53 #define DEBUG_PRINTF(fmt, ...) printf(fmt, __VA_ARGS__) 54 #else 55 #define DEBUG_PRINTF(fmt, ...) 56 #endif 57 58 using namespace lldb; 59 using namespace lldb_private; 60 DWARFASTParserClang::DWARFASTParserClang(TypeSystemClang &ast) 61 : m_ast(ast), m_die_to_decl_ctx(), m_decl_ctx_to_die() {} 62 63 DWARFASTParserClang::~DWARFASTParserClang() = default; 64 65 static AccessType DW_ACCESS_to_AccessType(uint32_t dwarf_accessibility) { 66 switch (dwarf_accessibility) { 67 case DW_ACCESS_public: 68 return eAccessPublic; 69 case DW_ACCESS_private: 70 return eAccessPrivate; 71 case DW_ACCESS_protected: 72 return eAccessProtected; 73 default: 74 break; 75 } 76 return eAccessNone; 77 } 78 79 static bool DeclKindIsCXXClass(clang::Decl::Kind decl_kind) { 80 switch (decl_kind) { 81 case clang::Decl::CXXRecord: 82 case clang::Decl::ClassTemplateSpecialization: 83 return true; 84 default: 85 break; 86 } 87 return false; 88 } 89 90 91 ClangASTImporter &DWARFASTParserClang::GetClangASTImporter() { 92 if (!m_clang_ast_importer_up) { 93 m_clang_ast_importer_up = std::make_unique<ClangASTImporter>(); 94 } 95 return *m_clang_ast_importer_up; 96 } 97 98 /// Detect a forward declaration that is nested in a DW_TAG_module. 99 static bool IsClangModuleFwdDecl(const DWARFDIE &Die) { 100 if (!Die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0)) 101 return false; 102 auto Parent = Die.GetParent(); 103 while (Parent.IsValid()) { 104 if (Parent.Tag() == DW_TAG_module) 105 return true; 106 Parent = Parent.GetParent(); 107 } 108 return false; 109 } 110 111 static DWARFDIE GetContainingClangModuleDIE(const DWARFDIE &die) { 112 if (die.IsValid()) { 113 DWARFDIE top_module_die; 114 // Now make sure this DIE is scoped in a DW_TAG_module tag and return true 115 // if so 116 for (DWARFDIE parent = die.GetParent(); parent.IsValid(); 117 parent = parent.GetParent()) { 118 const dw_tag_t tag = parent.Tag(); 119 if (tag == DW_TAG_module) 120 top_module_die = parent; 121 else if (tag == DW_TAG_compile_unit || tag == DW_TAG_partial_unit) 122 break; 123 } 124 125 return top_module_die; 126 } 127 return DWARFDIE(); 128 } 129 130 static lldb::ModuleSP GetContainingClangModule(const DWARFDIE &die) { 131 if (die.IsValid()) { 132 DWARFDIE clang_module_die = GetContainingClangModuleDIE(die); 133 134 if (clang_module_die) { 135 const char *module_name = clang_module_die.GetName(); 136 if (module_name) 137 return die.GetDWARF()->GetExternalModule( 138 lldb_private::ConstString(module_name)); 139 } 140 } 141 return lldb::ModuleSP(); 142 } 143 144 TypeSP DWARFASTParserClang::ParseTypeFromClangModule(const SymbolContext &sc, 145 const DWARFDIE &die, 146 Log *log) { 147 ModuleSP clang_module_sp = GetContainingClangModule(die); 148 if (!clang_module_sp) 149 return TypeSP(); 150 151 // If this type comes from a Clang module, recursively look in the 152 // DWARF section of the .pcm file in the module cache. Clang 153 // generates DWO skeleton units as breadcrumbs to find them. 154 llvm::SmallVector<CompilerContext, 4> decl_context; 155 die.GetDeclContext(decl_context); 156 TypeMap pcm_types; 157 158 // The type in the Clang module must have the same language as the current CU. 159 LanguageSet languages; 160 languages.Insert(SymbolFileDWARF::GetLanguageFamily(*die.GetCU())); 161 llvm::DenseSet<SymbolFile *> searched_symbol_files; 162 clang_module_sp->GetSymbolFile()->FindTypes(decl_context, languages, 163 searched_symbol_files, pcm_types); 164 if (pcm_types.Empty()) { 165 // Since this type is defined in one of the Clang modules imported 166 // by this symbol file, search all of them. Instead of calling 167 // sym_file->FindTypes(), which would return this again, go straight 168 // to the imported modules. 169 auto &sym_file = die.GetCU()->GetSymbolFileDWARF(); 170 171 // Well-formed clang modules never form cycles; guard against corrupted 172 // ones by inserting the current file. 173 searched_symbol_files.insert(&sym_file); 174 sym_file.ForEachExternalModule( 175 *sc.comp_unit, searched_symbol_files, [&](Module &module) { 176 module.GetSymbolFile()->FindTypes(decl_context, languages, 177 searched_symbol_files, pcm_types); 178 return pcm_types.GetSize(); 179 }); 180 } 181 182 if (!pcm_types.GetSize()) 183 return TypeSP(); 184 185 // We found a real definition for this type in the Clang module, so lets use 186 // it and cache the fact that we found a complete type for this die. 187 TypeSP pcm_type_sp = pcm_types.GetTypeAtIndex(0); 188 if (!pcm_type_sp) 189 return TypeSP(); 190 191 lldb_private::CompilerType pcm_type = pcm_type_sp->GetForwardCompilerType(); 192 lldb_private::CompilerType type = 193 GetClangASTImporter().CopyType(m_ast, pcm_type); 194 195 if (!type) 196 return TypeSP(); 197 198 // Under normal operation pcm_type is a shallow forward declaration 199 // that gets completed later. This is necessary to support cyclic 200 // data structures. If, however, pcm_type is already complete (for 201 // example, because it was loaded for a different target before), 202 // the definition needs to be imported right away, too. 203 // Type::ResolveClangType() effectively ignores the ResolveState 204 // inside type_sp and only looks at IsDefined(), so it never calls 205 // ClangASTImporter::ASTImporterDelegate::ImportDefinitionTo(), 206 // which does extra work for Objective-C classes. This would result 207 // in only the forward declaration to be visible. 208 if (pcm_type.IsDefined()) 209 GetClangASTImporter().RequireCompleteType(ClangUtil::GetQualType(type)); 210 211 SymbolFileDWARF *dwarf = die.GetDWARF(); 212 TypeSP type_sp(new Type(die.GetID(), dwarf, pcm_type_sp->GetName(), 213 pcm_type_sp->GetByteSize(nullptr), nullptr, 214 LLDB_INVALID_UID, Type::eEncodingInvalid, 215 &pcm_type_sp->GetDeclaration(), type, 216 Type::ResolveState::Forward, 217 TypePayloadClang(GetOwningClangModule(die)))); 218 219 dwarf->GetTypeList().Insert(type_sp); 220 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 221 clang::TagDecl *tag_decl = TypeSystemClang::GetAsTagDecl(type); 222 if (tag_decl) { 223 LinkDeclContextToDIE(tag_decl, die); 224 } else { 225 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE(die); 226 if (defn_decl_ctx) 227 LinkDeclContextToDIE(defn_decl_ctx, die); 228 } 229 230 return type_sp; 231 } 232 233 static void ForcefullyCompleteType(CompilerType type) { 234 bool started = TypeSystemClang::StartTagDeclarationDefinition(type); 235 lldbassert(started && "Unable to start a class type definition."); 236 TypeSystemClang::CompleteTagDeclarationDefinition(type); 237 const clang::TagDecl *td = ClangUtil::GetAsTagDecl(type); 238 auto &ts = llvm::cast<TypeSystemClang>(*type.GetTypeSystem()); 239 ts.GetMetadata(td)->SetIsForcefullyCompleted(); 240 } 241 242 /// Complete a type from debug info, or mark it as forcefully completed if 243 /// there is no definition of the type in the current Module. Call this function 244 /// in contexts where the usual C++ rules require a type to be complete (base 245 /// class, member, etc.). 246 static void RequireCompleteType(CompilerType type) { 247 // Technically, enums can be incomplete too, but we don't handle those as they 248 // are emitted even under -flimit-debug-info. 249 if (!TypeSystemClang::IsCXXClassType(type)) 250 return; 251 252 if (type.GetCompleteType()) 253 return; 254 255 // No complete definition in this module. Mark the class as complete to 256 // satisfy local ast invariants, but make a note of the fact that 257 // it is not _really_ complete so we can later search for a definition in a 258 // different module. 259 // Since we provide layout assistance, layouts of types containing this class 260 // will be correct even if we are not able to find the definition elsewhere. 261 ForcefullyCompleteType(type); 262 } 263 264 /// This function serves a similar purpose as RequireCompleteType above, but it 265 /// avoids completing the type if it is not immediately necessary. It only 266 /// ensures we _can_ complete the type later. 267 static void PrepareContextToReceiveMembers(TypeSystemClang &ast, 268 ClangASTImporter &ast_importer, 269 clang::DeclContext *decl_ctx, 270 DWARFDIE die, 271 const char *type_name_cstr) { 272 auto *tag_decl_ctx = clang::dyn_cast<clang::TagDecl>(decl_ctx); 273 if (!tag_decl_ctx) 274 return; // Non-tag context are always ready. 275 276 // We have already completed the type, or we have found its definition and are 277 // ready to complete it later (cf. ParseStructureLikeDIE). 278 if (tag_decl_ctx->isCompleteDefinition() || tag_decl_ctx->isBeingDefined()) 279 return; 280 281 // We reach this point of the tag was present in the debug info as a 282 // declaration only. If it was imported from another AST context (in the 283 // gmodules case), we can complete the type by doing a full import. 284 285 // If this type was not imported from an external AST, there's nothing to do. 286 CompilerType type = ast.GetTypeForDecl(tag_decl_ctx); 287 if (type && ast_importer.CanImport(type)) { 288 auto qual_type = ClangUtil::GetQualType(type); 289 if (ast_importer.RequireCompleteType(qual_type)) 290 return; 291 die.GetDWARF()->GetObjectFile()->GetModule()->ReportError( 292 "Unable to complete the Decl context for DIE '%s' at offset " 293 "0x%8.8x.\nPlease file a bug report.", 294 type_name_cstr ? type_name_cstr : "", die.GetOffset()); 295 } 296 297 // We don't have a type definition and/or the import failed. We must 298 // forcefully complete the type to avoid crashes. 299 ForcefullyCompleteType(type); 300 } 301 302 ParsedDWARFTypeAttributes::ParsedDWARFTypeAttributes(const DWARFDIE &die) { 303 DWARFAttributes attributes; 304 size_t num_attributes = die.GetAttributes(attributes); 305 for (size_t i = 0; i < num_attributes; ++i) { 306 dw_attr_t attr = attributes.AttributeAtIndex(i); 307 DWARFFormValue form_value; 308 if (!attributes.ExtractFormValueAtIndex(i, form_value)) 309 continue; 310 switch (attr) { 311 case DW_AT_abstract_origin: 312 abstract_origin = form_value; 313 break; 314 315 case DW_AT_accessibility: 316 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 317 break; 318 319 case DW_AT_artificial: 320 is_artificial = form_value.Boolean(); 321 break; 322 323 case DW_AT_bit_stride: 324 bit_stride = form_value.Unsigned(); 325 break; 326 327 case DW_AT_byte_size: 328 byte_size = form_value.Unsigned(); 329 break; 330 331 case DW_AT_byte_stride: 332 byte_stride = form_value.Unsigned(); 333 break; 334 335 case DW_AT_calling_convention: 336 calling_convention = form_value.Unsigned(); 337 break; 338 339 case DW_AT_containing_type: 340 containing_type = form_value; 341 break; 342 343 case DW_AT_decl_file: 344 // die.GetCU() can differ if DW_AT_specification uses DW_FORM_ref_addr. 345 decl.SetFile( 346 attributes.CompileUnitAtIndex(i)->GetFile(form_value.Unsigned())); 347 break; 348 case DW_AT_decl_line: 349 decl.SetLine(form_value.Unsigned()); 350 break; 351 case DW_AT_decl_column: 352 decl.SetColumn(form_value.Unsigned()); 353 break; 354 355 case DW_AT_declaration: 356 is_forward_declaration = form_value.Boolean(); 357 break; 358 359 case DW_AT_encoding: 360 encoding = form_value.Unsigned(); 361 break; 362 363 case DW_AT_enum_class: 364 is_scoped_enum = form_value.Boolean(); 365 break; 366 367 case DW_AT_explicit: 368 is_explicit = form_value.Boolean(); 369 break; 370 371 case DW_AT_external: 372 if (form_value.Unsigned()) 373 storage = clang::SC_Extern; 374 break; 375 376 case DW_AT_inline: 377 is_inline = form_value.Boolean(); 378 break; 379 380 case DW_AT_linkage_name: 381 case DW_AT_MIPS_linkage_name: 382 mangled_name = form_value.AsCString(); 383 break; 384 385 case DW_AT_name: 386 name.SetCString(form_value.AsCString()); 387 break; 388 389 case DW_AT_object_pointer: 390 object_pointer = form_value.Reference(); 391 break; 392 393 case DW_AT_signature: 394 signature = form_value; 395 break; 396 397 case DW_AT_specification: 398 specification = form_value; 399 break; 400 401 case DW_AT_type: 402 type = form_value; 403 break; 404 405 case DW_AT_virtuality: 406 is_virtual = form_value.Boolean(); 407 break; 408 409 case DW_AT_APPLE_objc_complete_type: 410 is_complete_objc_class = form_value.Signed(); 411 break; 412 413 case DW_AT_APPLE_objc_direct: 414 is_objc_direct_call = true; 415 break; 416 417 case DW_AT_APPLE_runtime_class: 418 class_language = (LanguageType)form_value.Signed(); 419 break; 420 421 case DW_AT_GNU_vector: 422 is_vector = form_value.Boolean(); 423 break; 424 case DW_AT_export_symbols: 425 exports_symbols = form_value.Boolean(); 426 break; 427 } 428 } 429 } 430 431 static std::string GetUnitName(const DWARFDIE &die) { 432 if (DWARFUnit *unit = die.GetCU()) 433 return unit->GetAbsolutePath().GetPath(); 434 return "<missing DWARF unit path>"; 435 } 436 437 TypeSP DWARFASTParserClang::ParseTypeFromDWARF(const SymbolContext &sc, 438 const DWARFDIE &die, 439 bool *type_is_new_ptr) { 440 if (type_is_new_ptr) 441 *type_is_new_ptr = false; 442 443 if (!die) 444 return nullptr; 445 446 Log *log(LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION | 447 DWARF_LOG_LOOKUPS)); 448 449 SymbolFileDWARF *dwarf = die.GetDWARF(); 450 if (log) { 451 DWARFDIE context_die; 452 clang::DeclContext *context = 453 GetClangDeclContextContainingDIE(die, &context_die); 454 455 dwarf->GetObjectFile()->GetModule()->LogMessage( 456 log, 457 "DWARFASTParserClang::ParseTypeFromDWARF " 458 "(die = 0x%8.8x, decl_ctx = %p (die 0x%8.8x)) %s name = '%s')", 459 die.GetOffset(), static_cast<void *>(context), context_die.GetOffset(), 460 die.GetTagAsCString(), die.GetName()); 461 } 462 463 Type *type_ptr = dwarf->GetDIEToType().lookup(die.GetDIE()); 464 if (type_ptr == DIE_IS_BEING_PARSED) 465 return nullptr; 466 if (type_ptr) 467 return type_ptr->shared_from_this(); 468 // Set a bit that lets us know that we are currently parsing this 469 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 470 471 ParsedDWARFTypeAttributes attrs(die); 472 473 if (DWARFDIE signature_die = attrs.signature.Reference()) { 474 if (TypeSP type_sp = 475 ParseTypeFromDWARF(sc, signature_die, type_is_new_ptr)) { 476 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 477 if (clang::DeclContext *decl_ctx = 478 GetCachedClangDeclContextForDIE(signature_die)) 479 LinkDeclContextToDIE(decl_ctx, die); 480 return type_sp; 481 } 482 return nullptr; 483 } 484 485 if (type_is_new_ptr) 486 *type_is_new_ptr = true; 487 488 const dw_tag_t tag = die.Tag(); 489 490 TypeSP type_sp; 491 492 switch (tag) { 493 case DW_TAG_typedef: 494 case DW_TAG_base_type: 495 case DW_TAG_pointer_type: 496 case DW_TAG_reference_type: 497 case DW_TAG_rvalue_reference_type: 498 case DW_TAG_const_type: 499 case DW_TAG_restrict_type: 500 case DW_TAG_volatile_type: 501 case DW_TAG_atomic_type: 502 case DW_TAG_unspecified_type: { 503 type_sp = ParseTypeModifier(sc, die, attrs); 504 break; 505 } 506 507 case DW_TAG_structure_type: 508 case DW_TAG_union_type: 509 case DW_TAG_class_type: { 510 type_sp = ParseStructureLikeDIE(sc, die, attrs); 511 break; 512 } 513 514 case DW_TAG_enumeration_type: { 515 type_sp = ParseEnum(sc, die, attrs); 516 break; 517 } 518 519 case DW_TAG_inlined_subroutine: 520 case DW_TAG_subprogram: 521 case DW_TAG_subroutine_type: { 522 type_sp = ParseSubroutine(die, attrs); 523 break; 524 } 525 case DW_TAG_array_type: { 526 type_sp = ParseArrayType(die, attrs); 527 break; 528 } 529 case DW_TAG_ptr_to_member_type: { 530 type_sp = ParsePointerToMemberType(die, attrs); 531 break; 532 } 533 default: 534 dwarf->GetObjectFile()->GetModule()->ReportError( 535 "{0x%8.8x}: unhandled type tag 0x%4.4x (%s), please file a bug and " 536 "attach the file at the start of this error message", 537 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 538 break; 539 } 540 541 // TODO: We should consider making the switch above exhaustive to simplify 542 // control flow in ParseTypeFromDWARF. Then, we could simply replace this 543 // return statement with a call to llvm_unreachable. 544 return UpdateSymbolContextScopeForType(sc, die, type_sp); 545 } 546 547 lldb::TypeSP 548 DWARFASTParserClang::ParseTypeModifier(const SymbolContext &sc, 549 const DWARFDIE &die, 550 ParsedDWARFTypeAttributes &attrs) { 551 Log *log(LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION | 552 DWARF_LOG_LOOKUPS)); 553 SymbolFileDWARF *dwarf = die.GetDWARF(); 554 const dw_tag_t tag = die.Tag(); 555 LanguageType cu_language = SymbolFileDWARF::GetLanguage(*die.GetCU()); 556 Type::ResolveState resolve_state = Type::ResolveState::Unresolved; 557 Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID; 558 TypeSP type_sp; 559 CompilerType clang_type; 560 561 if (tag == DW_TAG_typedef) { 562 // DeclContext will be populated when the clang type is materialized in 563 // Type::ResolveCompilerType. 564 PrepareContextToReceiveMembers( 565 m_ast, GetClangASTImporter(), 566 GetClangDeclContextContainingDIE(die, nullptr), die, 567 attrs.name.GetCString()); 568 569 if (attrs.type.IsValid()) { 570 // Try to parse a typedef from the (DWARF embedded in the) Clang 571 // module file first as modules can contain typedef'ed 572 // structures that have no names like: 573 // 574 // typedef struct { int a; } Foo; 575 // 576 // In this case we will have a structure with no name and a 577 // typedef named "Foo" that points to this unnamed 578 // structure. The name in the typedef is the only identifier for 579 // the struct, so always try to get typedefs from Clang modules 580 // if possible. 581 // 582 // The type_sp returned will be empty if the typedef doesn't 583 // exist in a module file, so it is cheap to call this function 584 // just to check. 585 // 586 // If we don't do this we end up creating a TypeSP that says 587 // this is a typedef to type 0x123 (the DW_AT_type value would 588 // be 0x123 in the DW_TAG_typedef), and this is the unnamed 589 // structure type. We will have a hard time tracking down an 590 // unnammed structure type in the module debug info, so we make 591 // sure we don't get into this situation by always resolving 592 // typedefs from the module. 593 const DWARFDIE encoding_die = attrs.type.Reference(); 594 595 // First make sure that the die that this is typedef'ed to _is_ 596 // just a declaration (DW_AT_declaration == 1), not a full 597 // definition since template types can't be represented in 598 // modules since only concrete instances of templates are ever 599 // emitted and modules won't contain those 600 if (encoding_die && 601 encoding_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 602 type_sp = ParseTypeFromClangModule(sc, die, log); 603 if (type_sp) 604 return type_sp; 605 } 606 } 607 } 608 609 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\") type => 0x%8.8lx\n", die.GetID(), 610 DW_TAG_value_to_name(tag), type_name_cstr, 611 encoding_uid.Reference()); 612 613 switch (tag) { 614 default: 615 break; 616 617 case DW_TAG_unspecified_type: 618 if (attrs.name == "nullptr_t" || attrs.name == "decltype(nullptr)") { 619 resolve_state = Type::ResolveState::Full; 620 clang_type = m_ast.GetBasicType(eBasicTypeNullPtr); 621 break; 622 } 623 // Fall through to base type below in case we can handle the type 624 // there... 625 LLVM_FALLTHROUGH; 626 627 case DW_TAG_base_type: 628 resolve_state = Type::ResolveState::Full; 629 clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize( 630 attrs.name.GetStringRef(), attrs.encoding, 631 attrs.byte_size.getValueOr(0) * 8); 632 break; 633 634 case DW_TAG_pointer_type: 635 encoding_data_type = Type::eEncodingIsPointerUID; 636 break; 637 case DW_TAG_reference_type: 638 encoding_data_type = Type::eEncodingIsLValueReferenceUID; 639 break; 640 case DW_TAG_rvalue_reference_type: 641 encoding_data_type = Type::eEncodingIsRValueReferenceUID; 642 break; 643 case DW_TAG_typedef: 644 encoding_data_type = Type::eEncodingIsTypedefUID; 645 break; 646 case DW_TAG_const_type: 647 encoding_data_type = Type::eEncodingIsConstUID; 648 break; 649 case DW_TAG_restrict_type: 650 encoding_data_type = Type::eEncodingIsRestrictUID; 651 break; 652 case DW_TAG_volatile_type: 653 encoding_data_type = Type::eEncodingIsVolatileUID; 654 break; 655 case DW_TAG_atomic_type: 656 encoding_data_type = Type::eEncodingIsAtomicUID; 657 break; 658 } 659 660 if (!clang_type && (encoding_data_type == Type::eEncodingIsPointerUID || 661 encoding_data_type == Type::eEncodingIsTypedefUID)) { 662 if (tag == DW_TAG_pointer_type) { 663 DWARFDIE target_die = die.GetReferencedDIE(DW_AT_type); 664 665 if (target_die.GetAttributeValueAsUnsigned(DW_AT_APPLE_block, 0)) { 666 // Blocks have a __FuncPtr inside them which is a pointer to a 667 // function of the proper type. 668 669 for (DWARFDIE child_die : target_die.children()) { 670 if (!strcmp(child_die.GetAttributeValueAsString(DW_AT_name, ""), 671 "__FuncPtr")) { 672 DWARFDIE function_pointer_type = 673 child_die.GetReferencedDIE(DW_AT_type); 674 675 if (function_pointer_type) { 676 DWARFDIE function_type = 677 function_pointer_type.GetReferencedDIE(DW_AT_type); 678 679 bool function_type_is_new_pointer; 680 TypeSP lldb_function_type_sp = ParseTypeFromDWARF( 681 sc, function_type, &function_type_is_new_pointer); 682 683 if (lldb_function_type_sp) { 684 clang_type = m_ast.CreateBlockPointerType( 685 lldb_function_type_sp->GetForwardCompilerType()); 686 encoding_data_type = Type::eEncodingIsUID; 687 attrs.type.Clear(); 688 resolve_state = Type::ResolveState::Full; 689 } 690 } 691 692 break; 693 } 694 } 695 } 696 } 697 698 if (cu_language == eLanguageTypeObjC || 699 cu_language == eLanguageTypeObjC_plus_plus) { 700 if (attrs.name) { 701 if (attrs.name == "id") { 702 if (log) 703 dwarf->GetObjectFile()->GetModule()->LogMessage( 704 log, 705 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 706 "is Objective-C 'id' built-in type.", 707 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 708 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 709 encoding_data_type = Type::eEncodingIsUID; 710 attrs.type.Clear(); 711 resolve_state = Type::ResolveState::Full; 712 } else if (attrs.name == "Class") { 713 if (log) 714 dwarf->GetObjectFile()->GetModule()->LogMessage( 715 log, 716 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 717 "is Objective-C 'Class' built-in type.", 718 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 719 clang_type = m_ast.GetBasicType(eBasicTypeObjCClass); 720 encoding_data_type = Type::eEncodingIsUID; 721 attrs.type.Clear(); 722 resolve_state = Type::ResolveState::Full; 723 } else if (attrs.name == "SEL") { 724 if (log) 725 dwarf->GetObjectFile()->GetModule()->LogMessage( 726 log, 727 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 728 "is Objective-C 'selector' built-in type.", 729 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 730 clang_type = m_ast.GetBasicType(eBasicTypeObjCSel); 731 encoding_data_type = Type::eEncodingIsUID; 732 attrs.type.Clear(); 733 resolve_state = Type::ResolveState::Full; 734 } 735 } else if (encoding_data_type == Type::eEncodingIsPointerUID && 736 attrs.type.IsValid()) { 737 // Clang sometimes erroneously emits id as objc_object*. In that 738 // case we fix up the type to "id". 739 740 const DWARFDIE encoding_die = attrs.type.Reference(); 741 742 if (encoding_die && encoding_die.Tag() == DW_TAG_structure_type) { 743 llvm::StringRef struct_name = encoding_die.GetName(); 744 if (struct_name == "objc_object") { 745 if (log) 746 dwarf->GetObjectFile()->GetModule()->LogMessage( 747 log, 748 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s " 749 "'%s' is 'objc_object*', which we overrode to " 750 "'id'.", 751 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 752 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 753 encoding_data_type = Type::eEncodingIsUID; 754 attrs.type.Clear(); 755 resolve_state = Type::ResolveState::Full; 756 } 757 } 758 } 759 } 760 } 761 762 type_sp = std::make_shared<Type>( 763 die.GetID(), dwarf, attrs.name, attrs.byte_size, nullptr, 764 dwarf->GetUID(attrs.type.Reference()), encoding_data_type, &attrs.decl, 765 clang_type, resolve_state, TypePayloadClang(GetOwningClangModule(die))); 766 767 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 768 return type_sp; 769 } 770 771 TypeSP DWARFASTParserClang::ParseEnum(const SymbolContext &sc, 772 const DWARFDIE &die, 773 ParsedDWARFTypeAttributes &attrs) { 774 Log *log(LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION | 775 DWARF_LOG_LOOKUPS)); 776 SymbolFileDWARF *dwarf = die.GetDWARF(); 777 const dw_tag_t tag = die.Tag(); 778 TypeSP type_sp; 779 780 if (attrs.is_forward_declaration) { 781 type_sp = ParseTypeFromClangModule(sc, die, log); 782 if (type_sp) 783 return type_sp; 784 785 DWARFDeclContext die_decl_ctx = SymbolFileDWARF::GetDWARFDeclContext(die); 786 787 type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx); 788 789 if (!type_sp) { 790 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 791 if (debug_map_symfile) { 792 // We weren't able to find a full declaration in this DWARF, 793 // see if we have a declaration anywhere else... 794 type_sp = debug_map_symfile->FindDefinitionTypeForDWARFDeclContext( 795 die_decl_ctx); 796 } 797 } 798 799 if (type_sp) { 800 if (log) { 801 dwarf->GetObjectFile()->GetModule()->LogMessage( 802 log, 803 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 804 "forward declaration, complete type is 0x%8.8" PRIx64, 805 static_cast<void *>(this), die.GetOffset(), 806 DW_TAG_value_to_name(tag), attrs.name.GetCString(), 807 type_sp->GetID()); 808 } 809 810 // We found a real definition for this type elsewhere so lets use 811 // it and cache the fact that we found a complete type for this 812 // die 813 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 814 clang::DeclContext *defn_decl_ctx = 815 GetCachedClangDeclContextForDIE(dwarf->GetDIE(type_sp->GetID())); 816 if (defn_decl_ctx) 817 LinkDeclContextToDIE(defn_decl_ctx, die); 818 return type_sp; 819 } 820 } 821 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 822 DW_TAG_value_to_name(tag), type_name_cstr); 823 824 CompilerType enumerator_clang_type; 825 CompilerType clang_type; 826 clang_type.SetCompilerType( 827 &m_ast, dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE())); 828 if (!clang_type) { 829 if (attrs.type.IsValid()) { 830 Type *enumerator_type = 831 dwarf->ResolveTypeUID(attrs.type.Reference(), true); 832 if (enumerator_type) 833 enumerator_clang_type = enumerator_type->GetFullCompilerType(); 834 } 835 836 if (!enumerator_clang_type) { 837 if (attrs.byte_size) { 838 enumerator_clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize( 839 "", DW_ATE_signed, *attrs.byte_size * 8); 840 } else { 841 enumerator_clang_type = m_ast.GetBasicType(eBasicTypeInt); 842 } 843 } 844 845 clang_type = m_ast.CreateEnumerationType( 846 attrs.name.GetStringRef(), 847 GetClangDeclContextContainingDIE(die, nullptr), 848 GetOwningClangModule(die), attrs.decl, enumerator_clang_type, 849 attrs.is_scoped_enum); 850 } else { 851 enumerator_clang_type = m_ast.GetEnumerationIntegerType(clang_type); 852 } 853 854 LinkDeclContextToDIE(TypeSystemClang::GetDeclContextForType(clang_type), die); 855 856 type_sp = std::make_shared<Type>( 857 die.GetID(), dwarf, attrs.name, attrs.byte_size, nullptr, 858 dwarf->GetUID(attrs.type.Reference()), Type::eEncodingIsUID, &attrs.decl, 859 clang_type, Type::ResolveState::Forward, 860 TypePayloadClang(GetOwningClangModule(die))); 861 862 if (TypeSystemClang::StartTagDeclarationDefinition(clang_type)) { 863 if (die.HasChildren()) { 864 bool is_signed = false; 865 enumerator_clang_type.IsIntegerType(is_signed); 866 ParseChildEnumerators(clang_type, is_signed, 867 type_sp->GetByteSize(nullptr).getValueOr(0), die); 868 } 869 TypeSystemClang::CompleteTagDeclarationDefinition(clang_type); 870 } else { 871 dwarf->GetObjectFile()->GetModule()->ReportError( 872 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 873 "definition.\nPlease file a bug and attach the file at the " 874 "start of this error message", 875 die.GetOffset(), attrs.name.GetCString()); 876 } 877 return type_sp; 878 } 879 880 static clang::CallingConv 881 ConvertDWARFCallingConventionToClang(const ParsedDWARFTypeAttributes &attrs) { 882 switch (attrs.calling_convention) { 883 case llvm::dwarf::DW_CC_normal: 884 return clang::CC_C; 885 case llvm::dwarf::DW_CC_BORLAND_stdcall: 886 return clang::CC_X86StdCall; 887 case llvm::dwarf::DW_CC_BORLAND_msfastcall: 888 return clang::CC_X86FastCall; 889 case llvm::dwarf::DW_CC_LLVM_vectorcall: 890 return clang::CC_X86VectorCall; 891 case llvm::dwarf::DW_CC_BORLAND_pascal: 892 return clang::CC_X86Pascal; 893 case llvm::dwarf::DW_CC_LLVM_Win64: 894 return clang::CC_Win64; 895 case llvm::dwarf::DW_CC_LLVM_X86_64SysV: 896 return clang::CC_X86_64SysV; 897 case llvm::dwarf::DW_CC_LLVM_X86RegCall: 898 return clang::CC_X86RegCall; 899 default: 900 break; 901 } 902 903 Log *log(LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION | 904 DWARF_LOG_LOOKUPS)); 905 LLDB_LOG(log, "Unsupported DW_AT_calling_convention value: {0}", 906 attrs.calling_convention); 907 // Use the default calling convention as a fallback. 908 return clang::CC_C; 909 } 910 911 TypeSP DWARFASTParserClang::ParseSubroutine(const DWARFDIE &die, 912 ParsedDWARFTypeAttributes &attrs) { 913 Log *log(LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION | 914 DWARF_LOG_LOOKUPS)); 915 916 SymbolFileDWARF *dwarf = die.GetDWARF(); 917 const dw_tag_t tag = die.Tag(); 918 919 bool is_variadic = false; 920 bool is_static = false; 921 bool has_template_params = false; 922 923 unsigned type_quals = 0; 924 925 std::string object_pointer_name; 926 if (attrs.object_pointer) { 927 const char *object_pointer_name_cstr = attrs.object_pointer.GetName(); 928 if (object_pointer_name_cstr) 929 object_pointer_name = object_pointer_name_cstr; 930 } 931 932 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 933 DW_TAG_value_to_name(tag), type_name_cstr); 934 935 CompilerType return_clang_type; 936 Type *func_type = NULL; 937 938 if (attrs.type.IsValid()) 939 func_type = dwarf->ResolveTypeUID(attrs.type.Reference(), true); 940 941 if (func_type) 942 return_clang_type = func_type->GetForwardCompilerType(); 943 else 944 return_clang_type = m_ast.GetBasicType(eBasicTypeVoid); 945 946 std::vector<CompilerType> function_param_types; 947 std::vector<clang::ParmVarDecl *> function_param_decls; 948 949 // Parse the function children for the parameters 950 951 DWARFDIE decl_ctx_die; 952 clang::DeclContext *containing_decl_ctx = 953 GetClangDeclContextContainingDIE(die, &decl_ctx_die); 954 const clang::Decl::Kind containing_decl_kind = 955 containing_decl_ctx->getDeclKind(); 956 957 bool is_cxx_method = DeclKindIsCXXClass(containing_decl_kind); 958 // Start off static. This will be set to false in 959 // ParseChildParameters(...) if we find a "this" parameters as the 960 // first parameter 961 if (is_cxx_method) { 962 is_static = true; 963 } 964 965 if (die.HasChildren()) { 966 bool skip_artificial = true; 967 ParseChildParameters(containing_decl_ctx, die, skip_artificial, is_static, 968 is_variadic, has_template_params, 969 function_param_types, function_param_decls, 970 type_quals); 971 } 972 973 bool ignore_containing_context = false; 974 // Check for templatized class member functions. If we had any 975 // DW_TAG_template_type_parameter or DW_TAG_template_value_parameter 976 // the DW_TAG_subprogram DIE, then we can't let this become a method in 977 // a class. Why? Because templatized functions are only emitted if one 978 // of the templatized methods is used in the current compile unit and 979 // we will end up with classes that may or may not include these member 980 // functions and this means one class won't match another class 981 // definition and it affects our ability to use a class in the clang 982 // expression parser. So for the greater good, we currently must not 983 // allow any template member functions in a class definition. 984 if (is_cxx_method && has_template_params) { 985 ignore_containing_context = true; 986 is_cxx_method = false; 987 } 988 989 clang::CallingConv calling_convention = 990 ConvertDWARFCallingConventionToClang(attrs); 991 992 // clang_type will get the function prototype clang type after this 993 // call 994 CompilerType clang_type = m_ast.CreateFunctionType( 995 return_clang_type, function_param_types.data(), 996 function_param_types.size(), is_variadic, type_quals, calling_convention); 997 998 if (attrs.name) { 999 bool type_handled = false; 1000 if (tag == DW_TAG_subprogram || tag == DW_TAG_inlined_subroutine) { 1001 ObjCLanguage::MethodName objc_method(attrs.name.GetStringRef(), true); 1002 if (objc_method.IsValid(true)) { 1003 CompilerType class_opaque_type; 1004 ConstString class_name(objc_method.GetClassName()); 1005 if (class_name) { 1006 TypeSP complete_objc_class_type_sp( 1007 dwarf->FindCompleteObjCDefinitionTypeForDIE(DWARFDIE(), 1008 class_name, false)); 1009 1010 if (complete_objc_class_type_sp) { 1011 CompilerType type_clang_forward_type = 1012 complete_objc_class_type_sp->GetForwardCompilerType(); 1013 if (TypeSystemClang::IsObjCObjectOrInterfaceType( 1014 type_clang_forward_type)) 1015 class_opaque_type = type_clang_forward_type; 1016 } 1017 } 1018 1019 if (class_opaque_type) { 1020 // If accessibility isn't set to anything valid, assume public 1021 // for now... 1022 if (attrs.accessibility == eAccessNone) 1023 attrs.accessibility = eAccessPublic; 1024 1025 clang::ObjCMethodDecl *objc_method_decl = 1026 m_ast.AddMethodToObjCObjectType( 1027 class_opaque_type, attrs.name.GetCString(), clang_type, 1028 attrs.accessibility, attrs.is_artificial, is_variadic, 1029 attrs.is_objc_direct_call); 1030 type_handled = objc_method_decl != NULL; 1031 if (type_handled) { 1032 LinkDeclContextToDIE(objc_method_decl, die); 1033 m_ast.SetMetadataAsUserID(objc_method_decl, die.GetID()); 1034 } else { 1035 dwarf->GetObjectFile()->GetModule()->ReportError( 1036 "{0x%8.8x}: invalid Objective-C method 0x%4.4x (%s), " 1037 "please file a bug and attach the file at the start of " 1038 "this error message", 1039 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 1040 } 1041 } 1042 } else if (is_cxx_method) { 1043 // Look at the parent of this DIE and see if is is a class or 1044 // struct and see if this is actually a C++ method 1045 Type *class_type = dwarf->ResolveType(decl_ctx_die); 1046 if (class_type) { 1047 bool alternate_defn = false; 1048 if (class_type->GetID() != decl_ctx_die.GetID() || 1049 IsClangModuleFwdDecl(decl_ctx_die)) { 1050 alternate_defn = true; 1051 1052 // We uniqued the parent class of this function to another 1053 // class so we now need to associate all dies under 1054 // "decl_ctx_die" to DIEs in the DIE for "class_type"... 1055 DWARFDIE class_type_die = dwarf->GetDIE(class_type->GetID()); 1056 1057 if (class_type_die) { 1058 std::vector<DWARFDIE> failures; 1059 1060 CopyUniqueClassMethodTypes(decl_ctx_die, class_type_die, 1061 class_type, failures); 1062 1063 // FIXME do something with these failures that's 1064 // smarter than just dropping them on the ground. 1065 // Unfortunately classes don't like having stuff added 1066 // to them after their definitions are complete... 1067 1068 Type *type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1069 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1070 return type_ptr->shared_from_this(); 1071 } 1072 } 1073 } 1074 1075 if (attrs.specification.IsValid()) { 1076 // We have a specification which we are going to base our 1077 // function prototype off of, so we need this type to be 1078 // completed so that the m_die_to_decl_ctx for the method in 1079 // the specification has a valid clang decl context. 1080 class_type->GetForwardCompilerType(); 1081 // If we have a specification, then the function type should 1082 // have been made with the specification and not with this 1083 // die. 1084 DWARFDIE spec_die = attrs.specification.Reference(); 1085 clang::DeclContext *spec_clang_decl_ctx = 1086 GetClangDeclContextForDIE(spec_die); 1087 if (spec_clang_decl_ctx) { 1088 LinkDeclContextToDIE(spec_clang_decl_ctx, die); 1089 } else { 1090 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1091 "0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8x" 1092 ") has no decl\n", 1093 die.GetID(), spec_die.GetOffset()); 1094 } 1095 type_handled = true; 1096 } else if (attrs.abstract_origin.IsValid()) { 1097 // We have a specification which we are going to base our 1098 // function prototype off of, so we need this type to be 1099 // completed so that the m_die_to_decl_ctx for the method in 1100 // the abstract origin has a valid clang decl context. 1101 class_type->GetForwardCompilerType(); 1102 1103 DWARFDIE abs_die = attrs.abstract_origin.Reference(); 1104 clang::DeclContext *abs_clang_decl_ctx = 1105 GetClangDeclContextForDIE(abs_die); 1106 if (abs_clang_decl_ctx) { 1107 LinkDeclContextToDIE(abs_clang_decl_ctx, die); 1108 } else { 1109 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1110 "0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8x" 1111 ") has no decl\n", 1112 die.GetID(), abs_die.GetOffset()); 1113 } 1114 type_handled = true; 1115 } else { 1116 CompilerType class_opaque_type = 1117 class_type->GetForwardCompilerType(); 1118 if (TypeSystemClang::IsCXXClassType(class_opaque_type)) { 1119 if (class_opaque_type.IsBeingDefined() || alternate_defn) { 1120 if (!is_static && !die.HasChildren()) { 1121 // We have a C++ member function with no children (this 1122 // pointer!) and clang will get mad if we try and make 1123 // a function that isn't well formed in the DWARF, so 1124 // we will just skip it... 1125 type_handled = true; 1126 } else { 1127 bool add_method = true; 1128 if (alternate_defn) { 1129 // If an alternate definition for the class exists, 1130 // then add the method only if an equivalent is not 1131 // already present. 1132 clang::CXXRecordDecl *record_decl = 1133 m_ast.GetAsCXXRecordDecl( 1134 class_opaque_type.GetOpaqueQualType()); 1135 if (record_decl) { 1136 for (auto method_iter = record_decl->method_begin(); 1137 method_iter != record_decl->method_end(); 1138 method_iter++) { 1139 clang::CXXMethodDecl *method_decl = *method_iter; 1140 if (method_decl->getNameInfo().getAsString() == 1141 attrs.name.GetStringRef()) { 1142 if (method_decl->getType() == 1143 ClangUtil::GetQualType(clang_type)) { 1144 add_method = false; 1145 LinkDeclContextToDIE(method_decl, die); 1146 type_handled = true; 1147 1148 break; 1149 } 1150 } 1151 } 1152 } 1153 } 1154 1155 if (add_method) { 1156 llvm::PrettyStackTraceFormat stack_trace( 1157 "SymbolFileDWARF::ParseType() is adding a method " 1158 "%s to class %s in DIE 0x%8.8" PRIx64 " from %s", 1159 attrs.name.GetCString(), 1160 class_type->GetName().GetCString(), die.GetID(), 1161 dwarf->GetObjectFile() 1162 ->GetFileSpec() 1163 .GetPath() 1164 .c_str()); 1165 1166 const bool is_attr_used = false; 1167 // Neither GCC 4.2 nor clang++ currently set a valid 1168 // accessibility in the DWARF for C++ methods... 1169 // Default to public for now... 1170 if (attrs.accessibility == eAccessNone) 1171 attrs.accessibility = eAccessPublic; 1172 1173 clang::CXXMethodDecl *cxx_method_decl = 1174 m_ast.AddMethodToCXXRecordType( 1175 class_opaque_type.GetOpaqueQualType(), 1176 attrs.name.GetCString(), attrs.mangled_name, 1177 clang_type, attrs.accessibility, attrs.is_virtual, 1178 is_static, attrs.is_inline, attrs.is_explicit, 1179 is_attr_used, attrs.is_artificial); 1180 1181 type_handled = cxx_method_decl != NULL; 1182 // Artificial methods are always handled even when we 1183 // don't create a new declaration for them. 1184 type_handled |= attrs.is_artificial; 1185 1186 if (cxx_method_decl) { 1187 LinkDeclContextToDIE(cxx_method_decl, die); 1188 1189 ClangASTMetadata metadata; 1190 metadata.SetUserID(die.GetID()); 1191 1192 if (!object_pointer_name.empty()) { 1193 metadata.SetObjectPtrName( 1194 object_pointer_name.c_str()); 1195 LLDB_LOGF(log, 1196 "Setting object pointer name: %s on method " 1197 "object %p.\n", 1198 object_pointer_name.c_str(), 1199 static_cast<void *>(cxx_method_decl)); 1200 } 1201 m_ast.SetMetadata(cxx_method_decl, metadata); 1202 } else { 1203 ignore_containing_context = true; 1204 } 1205 } 1206 } 1207 } else { 1208 // We were asked to parse the type for a method in a 1209 // class, yet the class hasn't been asked to complete 1210 // itself through the clang::ExternalASTSource protocol, 1211 // so we need to just have the class complete itself and 1212 // do things the right way, then our 1213 // DIE should then have an entry in the 1214 // dwarf->GetDIEToType() map. First 1215 // we need to modify the dwarf->GetDIEToType() so it 1216 // doesn't think we are trying to parse this DIE 1217 // anymore... 1218 dwarf->GetDIEToType()[die.GetDIE()] = NULL; 1219 1220 // Now we get the full type to force our class type to 1221 // complete itself using the clang::ExternalASTSource 1222 // protocol which will parse all base classes and all 1223 // methods (including the method for this DIE). 1224 class_type->GetFullCompilerType(); 1225 1226 // The type for this DIE should have been filled in the 1227 // function call above 1228 Type *type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1229 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1230 return type_ptr->shared_from_this(); 1231 } 1232 1233 // FIXME This is fixing some even uglier behavior but we 1234 // really need to 1235 // uniq the methods of each class as well as the class 1236 // itself. <rdar://problem/11240464> 1237 type_handled = true; 1238 } 1239 } 1240 } 1241 } 1242 } 1243 } 1244 1245 if (!type_handled) { 1246 clang::FunctionDecl *function_decl = nullptr; 1247 clang::FunctionDecl *template_function_decl = nullptr; 1248 1249 if (attrs.abstract_origin.IsValid()) { 1250 DWARFDIE abs_die = attrs.abstract_origin.Reference(); 1251 1252 if (dwarf->ResolveType(abs_die)) { 1253 function_decl = llvm::dyn_cast_or_null<clang::FunctionDecl>( 1254 GetCachedClangDeclContextForDIE(abs_die)); 1255 1256 if (function_decl) { 1257 LinkDeclContextToDIE(function_decl, die); 1258 } 1259 } 1260 } 1261 1262 if (!function_decl) { 1263 char *name_buf = nullptr; 1264 llvm::StringRef name = attrs.name.GetStringRef(); 1265 1266 // We currently generate function templates with template parameters in 1267 // their name. In order to get closer to the AST that clang generates 1268 // we want to strip these from the name when creating the AST. 1269 if (attrs.mangled_name) { 1270 llvm::ItaniumPartialDemangler D; 1271 if (!D.partialDemangle(attrs.mangled_name)) { 1272 name_buf = D.getFunctionBaseName(nullptr, nullptr); 1273 name = name_buf; 1274 } 1275 } 1276 1277 // We just have a function that isn't part of a class 1278 function_decl = m_ast.CreateFunctionDeclaration( 1279 ignore_containing_context ? m_ast.GetTranslationUnitDecl() 1280 : containing_decl_ctx, 1281 GetOwningClangModule(die), name, clang_type, attrs.storage, 1282 attrs.is_inline); 1283 std::free(name_buf); 1284 1285 if (has_template_params) { 1286 TypeSystemClang::TemplateParameterInfos template_param_infos; 1287 ParseTemplateParameterInfos(die, template_param_infos); 1288 template_function_decl = m_ast.CreateFunctionDeclaration( 1289 ignore_containing_context ? m_ast.GetTranslationUnitDecl() 1290 : containing_decl_ctx, 1291 GetOwningClangModule(die), attrs.name.GetStringRef(), clang_type, 1292 attrs.storage, attrs.is_inline); 1293 clang::FunctionTemplateDecl *func_template_decl = 1294 m_ast.CreateFunctionTemplateDecl( 1295 containing_decl_ctx, GetOwningClangModule(die), 1296 template_function_decl, template_param_infos); 1297 m_ast.CreateFunctionTemplateSpecializationInfo( 1298 template_function_decl, func_template_decl, template_param_infos); 1299 } 1300 1301 lldbassert(function_decl); 1302 1303 if (function_decl) { 1304 LinkDeclContextToDIE(function_decl, die); 1305 1306 if (!function_param_decls.empty()) { 1307 m_ast.SetFunctionParameters(function_decl, function_param_decls); 1308 if (template_function_decl) 1309 m_ast.SetFunctionParameters(template_function_decl, 1310 function_param_decls); 1311 } 1312 1313 ClangASTMetadata metadata; 1314 metadata.SetUserID(die.GetID()); 1315 1316 if (!object_pointer_name.empty()) { 1317 metadata.SetObjectPtrName(object_pointer_name.c_str()); 1318 LLDB_LOGF(log, 1319 "Setting object pointer name: %s on function " 1320 "object %p.", 1321 object_pointer_name.c_str(), 1322 static_cast<void *>(function_decl)); 1323 } 1324 m_ast.SetMetadata(function_decl, metadata); 1325 } 1326 } 1327 } 1328 } 1329 return std::make_shared<Type>( 1330 die.GetID(), dwarf, attrs.name, llvm::None, nullptr, LLDB_INVALID_UID, 1331 Type::eEncodingIsUID, &attrs.decl, clang_type, Type::ResolveState::Full); 1332 } 1333 1334 TypeSP DWARFASTParserClang::ParseArrayType(const DWARFDIE &die, 1335 ParsedDWARFTypeAttributes &attrs) { 1336 SymbolFileDWARF *dwarf = die.GetDWARF(); 1337 1338 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1339 DW_TAG_value_to_name(tag), type_name_cstr); 1340 1341 DWARFDIE type_die = attrs.type.Reference(); 1342 Type *element_type = dwarf->ResolveTypeUID(type_die, true); 1343 1344 if (!element_type) 1345 return nullptr; 1346 1347 llvm::Optional<SymbolFile::ArrayInfo> array_info = ParseChildArrayInfo(die); 1348 if (array_info) { 1349 attrs.byte_stride = array_info->byte_stride; 1350 attrs.bit_stride = array_info->bit_stride; 1351 } 1352 if (attrs.byte_stride == 0 && attrs.bit_stride == 0) 1353 attrs.byte_stride = element_type->GetByteSize(nullptr).getValueOr(0); 1354 CompilerType array_element_type = element_type->GetForwardCompilerType(); 1355 RequireCompleteType(array_element_type); 1356 1357 uint64_t array_element_bit_stride = 1358 attrs.byte_stride * 8 + attrs.bit_stride; 1359 CompilerType clang_type; 1360 if (array_info && array_info->element_orders.size() > 0) { 1361 uint64_t num_elements = 0; 1362 auto end = array_info->element_orders.rend(); 1363 for (auto pos = array_info->element_orders.rbegin(); pos != end; ++pos) { 1364 num_elements = *pos; 1365 clang_type = m_ast.CreateArrayType(array_element_type, num_elements, 1366 attrs.is_vector); 1367 array_element_type = clang_type; 1368 array_element_bit_stride = num_elements 1369 ? array_element_bit_stride * num_elements 1370 : array_element_bit_stride; 1371 } 1372 } else { 1373 clang_type = 1374 m_ast.CreateArrayType(array_element_type, 0, attrs.is_vector); 1375 } 1376 ConstString empty_name; 1377 TypeSP type_sp = std::make_shared<Type>( 1378 die.GetID(), dwarf, empty_name, array_element_bit_stride / 8, nullptr, 1379 dwarf->GetUID(type_die), Type::eEncodingIsUID, &attrs.decl, clang_type, 1380 Type::ResolveState::Full); 1381 type_sp->SetEncodingType(element_type); 1382 const clang::Type *type = ClangUtil::GetQualType(clang_type).getTypePtr(); 1383 m_ast.SetMetadataAsUserID(type, die.GetID()); 1384 return type_sp; 1385 } 1386 1387 TypeSP DWARFASTParserClang::ParsePointerToMemberType( 1388 const DWARFDIE &die, const ParsedDWARFTypeAttributes &attrs) { 1389 SymbolFileDWARF *dwarf = die.GetDWARF(); 1390 Type *pointee_type = dwarf->ResolveTypeUID(attrs.type.Reference(), true); 1391 Type *class_type = 1392 dwarf->ResolveTypeUID(attrs.containing_type.Reference(), true); 1393 1394 CompilerType pointee_clang_type = pointee_type->GetForwardCompilerType(); 1395 CompilerType class_clang_type = class_type->GetForwardCompilerType(); 1396 1397 CompilerType clang_type = TypeSystemClang::CreateMemberPointerType( 1398 class_clang_type, pointee_clang_type); 1399 1400 if (llvm::Optional<uint64_t> clang_type_size = 1401 clang_type.GetByteSize(nullptr)) { 1402 return std::make_shared<Type>(die.GetID(), dwarf, attrs.name, 1403 *clang_type_size, nullptr, LLDB_INVALID_UID, 1404 Type::eEncodingIsUID, nullptr, clang_type, 1405 Type::ResolveState::Forward); 1406 } 1407 return nullptr; 1408 } 1409 1410 void DWARFASTParserClang::ParseInheritance( 1411 const DWARFDIE &die, const DWARFDIE &parent_die, 1412 const CompilerType class_clang_type, const AccessType default_accessibility, 1413 const lldb::ModuleSP &module_sp, 1414 std::vector<std::unique_ptr<clang::CXXBaseSpecifier>> &base_classes, 1415 ClangASTImporter::LayoutInfo &layout_info) { 1416 1417 TypeSystemClang *ast = 1418 llvm::dyn_cast_or_null<TypeSystemClang>(class_clang_type.GetTypeSystem()); 1419 if (ast == nullptr) 1420 return; 1421 1422 // TODO: implement DW_TAG_inheritance type parsing. 1423 DWARFAttributes attributes; 1424 const size_t num_attributes = die.GetAttributes(attributes); 1425 if (num_attributes == 0) 1426 return; 1427 1428 DWARFFormValue encoding_form; 1429 AccessType accessibility = default_accessibility; 1430 bool is_virtual = false; 1431 bool is_base_of_class = true; 1432 off_t member_byte_offset = 0; 1433 1434 for (uint32_t i = 0; i < num_attributes; ++i) { 1435 const dw_attr_t attr = attributes.AttributeAtIndex(i); 1436 DWARFFormValue form_value; 1437 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1438 switch (attr) { 1439 case DW_AT_type: 1440 encoding_form = form_value; 1441 break; 1442 case DW_AT_data_member_location: 1443 if (form_value.BlockData()) { 1444 Value initialValue(0); 1445 Value memberOffset(0); 1446 const DWARFDataExtractor &debug_info_data = die.GetData(); 1447 uint32_t block_length = form_value.Unsigned(); 1448 uint32_t block_offset = 1449 form_value.BlockData() - debug_info_data.GetDataStart(); 1450 if (DWARFExpression::Evaluate( 1451 nullptr, nullptr, module_sp, 1452 DataExtractor(debug_info_data, block_offset, block_length), 1453 die.GetCU(), eRegisterKindDWARF, &initialValue, nullptr, 1454 memberOffset, nullptr)) { 1455 member_byte_offset = memberOffset.ResolveValue(nullptr).UInt(); 1456 } 1457 } else { 1458 // With DWARF 3 and later, if the value is an integer constant, 1459 // this form value is the offset in bytes from the beginning of 1460 // the containing entity. 1461 member_byte_offset = form_value.Unsigned(); 1462 } 1463 break; 1464 1465 case DW_AT_accessibility: 1466 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 1467 break; 1468 1469 case DW_AT_virtuality: 1470 is_virtual = form_value.Boolean(); 1471 break; 1472 1473 default: 1474 break; 1475 } 1476 } 1477 } 1478 1479 Type *base_class_type = die.ResolveTypeUID(encoding_form.Reference()); 1480 if (base_class_type == nullptr) { 1481 module_sp->ReportError("0x%8.8x: DW_TAG_inheritance failed to " 1482 "resolve the base class at 0x%8.8x" 1483 " from enclosing type 0x%8.8x. \nPlease file " 1484 "a bug and attach the file at the start of " 1485 "this error message", 1486 die.GetOffset(), 1487 encoding_form.Reference().GetOffset(), 1488 parent_die.GetOffset()); 1489 return; 1490 } 1491 1492 CompilerType base_class_clang_type = base_class_type->GetFullCompilerType(); 1493 assert(base_class_clang_type); 1494 if (TypeSystemClang::IsObjCObjectOrInterfaceType(class_clang_type)) { 1495 ast->SetObjCSuperClass(class_clang_type, base_class_clang_type); 1496 return; 1497 } 1498 std::unique_ptr<clang::CXXBaseSpecifier> result = 1499 ast->CreateBaseClassSpecifier(base_class_clang_type.GetOpaqueQualType(), 1500 accessibility, is_virtual, 1501 is_base_of_class); 1502 if (!result) 1503 return; 1504 1505 base_classes.push_back(std::move(result)); 1506 1507 if (is_virtual) { 1508 // Do not specify any offset for virtual inheritance. The DWARF 1509 // produced by clang doesn't give us a constant offset, but gives 1510 // us a DWARF expressions that requires an actual object in memory. 1511 // the DW_AT_data_member_location for a virtual base class looks 1512 // like: 1513 // DW_AT_data_member_location( DW_OP_dup, DW_OP_deref, 1514 // DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref, 1515 // DW_OP_plus ) 1516 // Given this, there is really no valid response we can give to 1517 // clang for virtual base class offsets, and this should eventually 1518 // be removed from LayoutRecordType() in the external 1519 // AST source in clang. 1520 } else { 1521 layout_info.base_offsets.insert(std::make_pair( 1522 ast->GetAsCXXRecordDecl(base_class_clang_type.GetOpaqueQualType()), 1523 clang::CharUnits::fromQuantity(member_byte_offset))); 1524 } 1525 } 1526 1527 TypeSP DWARFASTParserClang::UpdateSymbolContextScopeForType( 1528 const SymbolContext &sc, const DWARFDIE &die, TypeSP type_sp) { 1529 if (!type_sp) 1530 return type_sp; 1531 1532 SymbolFileDWARF *dwarf = die.GetDWARF(); 1533 DWARFDIE sc_parent_die = SymbolFileDWARF::GetParentSymbolContextDIE(die); 1534 dw_tag_t sc_parent_tag = sc_parent_die.Tag(); 1535 1536 SymbolContextScope *symbol_context_scope = nullptr; 1537 if (sc_parent_tag == DW_TAG_compile_unit || 1538 sc_parent_tag == DW_TAG_partial_unit) { 1539 symbol_context_scope = sc.comp_unit; 1540 } else if (sc.function != nullptr && sc_parent_die) { 1541 symbol_context_scope = 1542 sc.function->GetBlock(true).FindBlockByID(sc_parent_die.GetID()); 1543 if (symbol_context_scope == nullptr) 1544 symbol_context_scope = sc.function; 1545 } else { 1546 symbol_context_scope = sc.module_sp.get(); 1547 } 1548 1549 if (symbol_context_scope != nullptr) 1550 type_sp->SetSymbolContextScope(symbol_context_scope); 1551 1552 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1553 return type_sp; 1554 } 1555 1556 TypeSP 1557 DWARFASTParserClang::ParseStructureLikeDIE(const SymbolContext &sc, 1558 const DWARFDIE &die, 1559 ParsedDWARFTypeAttributes &attrs) { 1560 TypeSP type_sp; 1561 CompilerType clang_type; 1562 const dw_tag_t tag = die.Tag(); 1563 SymbolFileDWARF *dwarf = die.GetDWARF(); 1564 LanguageType cu_language = SymbolFileDWARF::GetLanguage(*die.GetCU()); 1565 Log *log = LogChannelDWARF::GetLogIfAll(DWARF_LOG_TYPE_COMPLETION | 1566 DWARF_LOG_LOOKUPS); 1567 1568 // UniqueDWARFASTType is large, so don't create a local variables on the 1569 // stack, put it on the heap. This function is often called recursively and 1570 // clang isn't good at sharing the stack space for variables in different 1571 // blocks. 1572 auto unique_ast_entry_up = std::make_unique<UniqueDWARFASTType>(); 1573 1574 ConstString unique_typename(attrs.name); 1575 Declaration unique_decl(attrs.decl); 1576 1577 if (attrs.name) { 1578 if (Language::LanguageIsCPlusPlus(cu_language)) { 1579 // For C++, we rely solely upon the one definition rule that says 1580 // only one thing can exist at a given decl context. We ignore the 1581 // file and line that things are declared on. 1582 std::string qualified_name; 1583 if (die.GetQualifiedName(qualified_name)) 1584 unique_typename = ConstString(qualified_name); 1585 unique_decl.Clear(); 1586 } 1587 1588 if (dwarf->GetUniqueDWARFASTTypeMap().Find( 1589 unique_typename, die, unique_decl, attrs.byte_size.getValueOr(-1), 1590 *unique_ast_entry_up)) { 1591 type_sp = unique_ast_entry_up->m_type_sp; 1592 if (type_sp) { 1593 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1594 LinkDeclContextToDIE( 1595 GetCachedClangDeclContextForDIE(unique_ast_entry_up->m_die), die); 1596 return type_sp; 1597 } 1598 } 1599 } 1600 1601 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1602 DW_TAG_value_to_name(tag), type_name_cstr); 1603 1604 int tag_decl_kind = -1; 1605 AccessType default_accessibility = eAccessNone; 1606 if (tag == DW_TAG_structure_type) { 1607 tag_decl_kind = clang::TTK_Struct; 1608 default_accessibility = eAccessPublic; 1609 } else if (tag == DW_TAG_union_type) { 1610 tag_decl_kind = clang::TTK_Union; 1611 default_accessibility = eAccessPublic; 1612 } else if (tag == DW_TAG_class_type) { 1613 tag_decl_kind = clang::TTK_Class; 1614 default_accessibility = eAccessPrivate; 1615 } 1616 1617 if (attrs.byte_size && *attrs.byte_size == 0 && attrs.name && 1618 !die.HasChildren() && cu_language == eLanguageTypeObjC) { 1619 // Work around an issue with clang at the moment where forward 1620 // declarations for objective C classes are emitted as: 1621 // DW_TAG_structure_type [2] 1622 // DW_AT_name( "ForwardObjcClass" ) 1623 // DW_AT_byte_size( 0x00 ) 1624 // DW_AT_decl_file( "..." ) 1625 // DW_AT_decl_line( 1 ) 1626 // 1627 // Note that there is no DW_AT_declaration and there are no children, 1628 // and the byte size is zero. 1629 attrs.is_forward_declaration = true; 1630 } 1631 1632 if (attrs.class_language == eLanguageTypeObjC || 1633 attrs.class_language == eLanguageTypeObjC_plus_plus) { 1634 if (!attrs.is_complete_objc_class && 1635 die.Supports_DW_AT_APPLE_objc_complete_type()) { 1636 // We have a valid eSymbolTypeObjCClass class symbol whose name 1637 // matches the current objective C class that we are trying to find 1638 // and this DIE isn't the complete definition (we checked 1639 // is_complete_objc_class above and know it is false), so the real 1640 // definition is in here somewhere 1641 type_sp = 1642 dwarf->FindCompleteObjCDefinitionTypeForDIE(die, attrs.name, true); 1643 1644 if (!type_sp) { 1645 SymbolFileDWARFDebugMap *debug_map_symfile = 1646 dwarf->GetDebugMapSymfile(); 1647 if (debug_map_symfile) { 1648 // We weren't able to find a full declaration in this DWARF, 1649 // see if we have a declaration anywhere else... 1650 type_sp = debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE( 1651 die, attrs.name, true); 1652 } 1653 } 1654 1655 if (type_sp) { 1656 if (log) { 1657 dwarf->GetObjectFile()->GetModule()->LogMessage( 1658 log, 1659 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is an " 1660 "incomplete objc type, complete type is 0x%8.8" PRIx64, 1661 static_cast<void *>(this), die.GetOffset(), 1662 DW_TAG_value_to_name(tag), attrs.name.GetCString(), 1663 type_sp->GetID()); 1664 } 1665 1666 // We found a real definition for this type elsewhere so lets use 1667 // it and cache the fact that we found a complete type for this 1668 // die 1669 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1670 return type_sp; 1671 } 1672 } 1673 } 1674 1675 if (attrs.is_forward_declaration) { 1676 // We have a forward declaration to a type and we need to try and 1677 // find a full declaration. We look in the current type index just in 1678 // case we have a forward declaration followed by an actual 1679 // declarations in the DWARF. If this fails, we need to look 1680 // elsewhere... 1681 if (log) { 1682 dwarf->GetObjectFile()->GetModule()->LogMessage( 1683 log, 1684 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 1685 "forward declaration, trying to find complete type", 1686 static_cast<void *>(this), die.GetOffset(), DW_TAG_value_to_name(tag), 1687 attrs.name.GetCString()); 1688 } 1689 1690 // See if the type comes from a Clang module and if so, track down 1691 // that type. 1692 type_sp = ParseTypeFromClangModule(sc, die, log); 1693 if (type_sp) 1694 return type_sp; 1695 1696 DWARFDeclContext die_decl_ctx = SymbolFileDWARF::GetDWARFDeclContext(die); 1697 1698 // type_sp = FindDefinitionTypeForDIE (dwarf_cu, die, 1699 // type_name_const_str); 1700 type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx); 1701 1702 if (!type_sp) { 1703 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 1704 if (debug_map_symfile) { 1705 // We weren't able to find a full declaration in this DWARF, see 1706 // if we have a declaration anywhere else... 1707 type_sp = debug_map_symfile->FindDefinitionTypeForDWARFDeclContext( 1708 die_decl_ctx); 1709 } 1710 } 1711 1712 if (type_sp) { 1713 if (log) { 1714 dwarf->GetObjectFile()->GetModule()->LogMessage( 1715 log, 1716 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 1717 "forward declaration, complete type is 0x%8.8" PRIx64, 1718 static_cast<void *>(this), die.GetOffset(), 1719 DW_TAG_value_to_name(tag), attrs.name.GetCString(), 1720 type_sp->GetID()); 1721 } 1722 1723 // We found a real definition for this type elsewhere so lets use 1724 // it and cache the fact that we found a complete type for this die 1725 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1726 clang::DeclContext *defn_decl_ctx = 1727 GetCachedClangDeclContextForDIE(dwarf->GetDIE(type_sp->GetID())); 1728 if (defn_decl_ctx) 1729 LinkDeclContextToDIE(defn_decl_ctx, die); 1730 return type_sp; 1731 } 1732 } 1733 assert(tag_decl_kind != -1); 1734 (void)tag_decl_kind; 1735 bool clang_type_was_created = false; 1736 clang_type.SetCompilerType( 1737 &m_ast, dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE())); 1738 if (!clang_type) { 1739 clang::DeclContext *decl_ctx = 1740 GetClangDeclContextContainingDIE(die, nullptr); 1741 1742 PrepareContextToReceiveMembers(m_ast, GetClangASTImporter(), decl_ctx, die, 1743 attrs.name.GetCString()); 1744 1745 if (attrs.accessibility == eAccessNone && decl_ctx) { 1746 // Check the decl context that contains this class/struct/union. If 1747 // it is a class we must give it an accessibility. 1748 const clang::Decl::Kind containing_decl_kind = decl_ctx->getDeclKind(); 1749 if (DeclKindIsCXXClass(containing_decl_kind)) 1750 attrs.accessibility = default_accessibility; 1751 } 1752 1753 ClangASTMetadata metadata; 1754 metadata.SetUserID(die.GetID()); 1755 metadata.SetIsDynamicCXXType(dwarf->ClassOrStructIsVirtual(die)); 1756 1757 if (attrs.name.GetStringRef().contains('<')) { 1758 TypeSystemClang::TemplateParameterInfos template_param_infos; 1759 if (ParseTemplateParameterInfos(die, template_param_infos)) { 1760 clang::ClassTemplateDecl *class_template_decl = 1761 m_ast.ParseClassTemplateDecl( 1762 decl_ctx, GetOwningClangModule(die), attrs.accessibility, 1763 attrs.name.GetCString(), tag_decl_kind, template_param_infos); 1764 if (!class_template_decl) { 1765 if (log) { 1766 dwarf->GetObjectFile()->GetModule()->LogMessage( 1767 log, 1768 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" " 1769 "clang::ClassTemplateDecl failed to return a decl.", 1770 static_cast<void *>(this), die.GetOffset(), 1771 DW_TAG_value_to_name(tag), attrs.name.GetCString()); 1772 } 1773 return TypeSP(); 1774 } 1775 1776 clang::ClassTemplateSpecializationDecl *class_specialization_decl = 1777 m_ast.CreateClassTemplateSpecializationDecl( 1778 decl_ctx, GetOwningClangModule(die), class_template_decl, 1779 tag_decl_kind, template_param_infos); 1780 clang_type = m_ast.CreateClassTemplateSpecializationType( 1781 class_specialization_decl); 1782 clang_type_was_created = true; 1783 1784 m_ast.SetMetadata(class_template_decl, metadata); 1785 m_ast.SetMetadata(class_specialization_decl, metadata); 1786 } 1787 } 1788 1789 if (!clang_type_was_created) { 1790 clang_type_was_created = true; 1791 clang_type = m_ast.CreateRecordType( 1792 decl_ctx, GetOwningClangModule(die), attrs.accessibility, 1793 attrs.name.GetCString(), tag_decl_kind, attrs.class_language, 1794 &metadata, attrs.exports_symbols); 1795 } 1796 } 1797 1798 // Store a forward declaration to this class type in case any 1799 // parameters in any class methods need it for the clang types for 1800 // function prototypes. 1801 LinkDeclContextToDIE(m_ast.GetDeclContextForType(clang_type), die); 1802 type_sp = std::make_shared<Type>( 1803 die.GetID(), dwarf, attrs.name, attrs.byte_size, nullptr, 1804 LLDB_INVALID_UID, Type::eEncodingIsUID, &attrs.decl, clang_type, 1805 Type::ResolveState::Forward, 1806 TypePayloadClang(OptionalClangModuleID(), attrs.is_complete_objc_class)); 1807 1808 // Add our type to the unique type map so we don't end up creating many 1809 // copies of the same type over and over in the ASTContext for our 1810 // module 1811 unique_ast_entry_up->m_type_sp = type_sp; 1812 unique_ast_entry_up->m_die = die; 1813 unique_ast_entry_up->m_declaration = unique_decl; 1814 unique_ast_entry_up->m_byte_size = attrs.byte_size.getValueOr(0); 1815 dwarf->GetUniqueDWARFASTTypeMap().Insert(unique_typename, 1816 *unique_ast_entry_up); 1817 1818 if (!attrs.is_forward_declaration) { 1819 // Always start the definition for a class type so that if the class 1820 // has child classes or types that require the class to be created 1821 // for use as their decl contexts the class will be ready to accept 1822 // these child definitions. 1823 if (!die.HasChildren()) { 1824 // No children for this struct/union/class, lets finish it 1825 if (TypeSystemClang::StartTagDeclarationDefinition(clang_type)) { 1826 TypeSystemClang::CompleteTagDeclarationDefinition(clang_type); 1827 } else { 1828 dwarf->GetObjectFile()->GetModule()->ReportError( 1829 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 1830 "definition.\nPlease file a bug and attach the file at the " 1831 "start of this error message", 1832 die.GetOffset(), attrs.name.GetCString()); 1833 } 1834 1835 // If the byte size of the record is specified then overwrite the size 1836 // that would be computed by Clang. This is only needed as LLDB's 1837 // TypeSystemClang is always in C++ mode, but some compilers such as 1838 // GCC and Clang give empty structs a size of 0 in C mode (in contrast to 1839 // the size of 1 for empty structs that would be computed in C++ mode). 1840 if (attrs.byte_size) { 1841 clang::RecordDecl *record_decl = 1842 TypeSystemClang::GetAsRecordDecl(clang_type); 1843 if (record_decl) { 1844 ClangASTImporter::LayoutInfo layout; 1845 layout.bit_size = *attrs.byte_size * 8; 1846 GetClangASTImporter().SetRecordLayout(record_decl, layout); 1847 } 1848 } 1849 } else if (clang_type_was_created) { 1850 // Start the definition if the class is not objective C since the 1851 // underlying decls respond to isCompleteDefinition(). Objective 1852 // C decls don't respond to isCompleteDefinition() so we can't 1853 // start the declaration definition right away. For C++ 1854 // class/union/structs we want to start the definition in case the 1855 // class is needed as the declaration context for a contained class 1856 // or type without the need to complete that type.. 1857 1858 if (attrs.class_language != eLanguageTypeObjC && 1859 attrs.class_language != eLanguageTypeObjC_plus_plus) 1860 TypeSystemClang::StartTagDeclarationDefinition(clang_type); 1861 1862 // Leave this as a forward declaration until we need to know the 1863 // details of the type. lldb_private::Type will automatically call 1864 // the SymbolFile virtual function 1865 // "SymbolFileDWARF::CompleteType(Type *)" When the definition 1866 // needs to be defined. 1867 assert(!dwarf->GetForwardDeclClangTypeToDie().count( 1868 ClangUtil::RemoveFastQualifiers(clang_type) 1869 .GetOpaqueQualType()) && 1870 "Type already in the forward declaration map!"); 1871 // Can't assume m_ast.GetSymbolFile() is actually a 1872 // SymbolFileDWARF, it can be a SymbolFileDWARFDebugMap for Apple 1873 // binaries. 1874 dwarf->GetForwardDeclDieToClangType()[die.GetDIE()] = 1875 clang_type.GetOpaqueQualType(); 1876 dwarf->GetForwardDeclClangTypeToDie().try_emplace( 1877 ClangUtil::RemoveFastQualifiers(clang_type).GetOpaqueQualType(), 1878 *die.GetDIERef()); 1879 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), true); 1880 } 1881 } 1882 1883 // If we made a clang type, set the trivial abi if applicable: We only 1884 // do this for pass by value - which implies the Trivial ABI. There 1885 // isn't a way to assert that something that would normally be pass by 1886 // value is pass by reference, so we ignore that attribute if set. 1887 if (attrs.calling_convention == llvm::dwarf::DW_CC_pass_by_value) { 1888 clang::CXXRecordDecl *record_decl = 1889 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 1890 if (record_decl && record_decl->getDefinition()) { 1891 record_decl->setHasTrivialSpecialMemberForCall(); 1892 } 1893 } 1894 1895 if (attrs.calling_convention == llvm::dwarf::DW_CC_pass_by_reference) { 1896 clang::CXXRecordDecl *record_decl = 1897 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 1898 if (record_decl) 1899 record_decl->setArgPassingRestrictions( 1900 clang::RecordDecl::APK_CannotPassInRegs); 1901 } 1902 return type_sp; 1903 } 1904 1905 // DWARF parsing functions 1906 1907 class DWARFASTParserClang::DelayedAddObjCClassProperty { 1908 public: 1909 DelayedAddObjCClassProperty( 1910 const CompilerType &class_opaque_type, const char *property_name, 1911 const CompilerType &property_opaque_type, // The property type is only 1912 // required if you don't have an 1913 // ivar decl 1914 const char *property_setter_name, const char *property_getter_name, 1915 uint32_t property_attributes, const ClangASTMetadata *metadata) 1916 : m_class_opaque_type(class_opaque_type), m_property_name(property_name), 1917 m_property_opaque_type(property_opaque_type), 1918 m_property_setter_name(property_setter_name), 1919 m_property_getter_name(property_getter_name), 1920 m_property_attributes(property_attributes) { 1921 if (metadata != nullptr) { 1922 m_metadata_up = std::make_unique<ClangASTMetadata>(); 1923 *m_metadata_up = *metadata; 1924 } 1925 } 1926 1927 DelayedAddObjCClassProperty(const DelayedAddObjCClassProperty &rhs) { 1928 *this = rhs; 1929 } 1930 1931 DelayedAddObjCClassProperty & 1932 operator=(const DelayedAddObjCClassProperty &rhs) { 1933 m_class_opaque_type = rhs.m_class_opaque_type; 1934 m_property_name = rhs.m_property_name; 1935 m_property_opaque_type = rhs.m_property_opaque_type; 1936 m_property_setter_name = rhs.m_property_setter_name; 1937 m_property_getter_name = rhs.m_property_getter_name; 1938 m_property_attributes = rhs.m_property_attributes; 1939 1940 if (rhs.m_metadata_up) { 1941 m_metadata_up = std::make_unique<ClangASTMetadata>(); 1942 *m_metadata_up = *rhs.m_metadata_up; 1943 } 1944 return *this; 1945 } 1946 1947 bool Finalize() { 1948 return TypeSystemClang::AddObjCClassProperty( 1949 m_class_opaque_type, m_property_name, m_property_opaque_type, 1950 /*ivar_decl=*/nullptr, m_property_setter_name, m_property_getter_name, 1951 m_property_attributes, m_metadata_up.get()); 1952 } 1953 1954 private: 1955 CompilerType m_class_opaque_type; 1956 const char *m_property_name; 1957 CompilerType m_property_opaque_type; 1958 const char *m_property_setter_name; 1959 const char *m_property_getter_name; 1960 uint32_t m_property_attributes; 1961 std::unique_ptr<ClangASTMetadata> m_metadata_up; 1962 }; 1963 1964 bool DWARFASTParserClang::ParseTemplateDIE( 1965 const DWARFDIE &die, 1966 TypeSystemClang::TemplateParameterInfos &template_param_infos) { 1967 const dw_tag_t tag = die.Tag(); 1968 bool is_template_template_argument = false; 1969 1970 switch (tag) { 1971 case DW_TAG_GNU_template_parameter_pack: { 1972 template_param_infos.packed_args = 1973 std::make_unique<TypeSystemClang::TemplateParameterInfos>(); 1974 for (DWARFDIE child_die : die.children()) { 1975 if (!ParseTemplateDIE(child_die, *template_param_infos.packed_args)) 1976 return false; 1977 } 1978 if (const char *name = die.GetName()) { 1979 template_param_infos.pack_name = name; 1980 } 1981 return true; 1982 } 1983 case DW_TAG_GNU_template_template_param: 1984 is_template_template_argument = true; 1985 LLVM_FALLTHROUGH; 1986 case DW_TAG_template_type_parameter: 1987 case DW_TAG_template_value_parameter: { 1988 DWARFAttributes attributes; 1989 const size_t num_attributes = die.GetAttributes(attributes); 1990 const char *name = nullptr; 1991 const char *template_name = nullptr; 1992 CompilerType clang_type; 1993 uint64_t uval64 = 0; 1994 bool uval64_valid = false; 1995 if (num_attributes > 0) { 1996 DWARFFormValue form_value; 1997 for (size_t i = 0; i < num_attributes; ++i) { 1998 const dw_attr_t attr = attributes.AttributeAtIndex(i); 1999 2000 switch (attr) { 2001 case DW_AT_name: 2002 if (attributes.ExtractFormValueAtIndex(i, form_value)) 2003 name = form_value.AsCString(); 2004 break; 2005 2006 case DW_AT_GNU_template_name: 2007 if (attributes.ExtractFormValueAtIndex(i, form_value)) 2008 template_name = form_value.AsCString(); 2009 break; 2010 2011 case DW_AT_type: 2012 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2013 Type *lldb_type = die.ResolveTypeUID(form_value.Reference()); 2014 if (lldb_type) 2015 clang_type = lldb_type->GetForwardCompilerType(); 2016 } 2017 break; 2018 2019 case DW_AT_const_value: 2020 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2021 uval64_valid = true; 2022 uval64 = form_value.Unsigned(); 2023 } 2024 break; 2025 default: 2026 break; 2027 } 2028 } 2029 2030 clang::ASTContext &ast = m_ast.getASTContext(); 2031 if (!clang_type) 2032 clang_type = m_ast.GetBasicType(eBasicTypeVoid); 2033 2034 if (!is_template_template_argument) { 2035 bool is_signed = false; 2036 if (name && name[0]) 2037 template_param_infos.names.push_back(name); 2038 else 2039 template_param_infos.names.push_back(NULL); 2040 2041 // Get the signed value for any integer or enumeration if available 2042 clang_type.IsIntegerOrEnumerationType(is_signed); 2043 2044 if (tag == DW_TAG_template_value_parameter && uval64_valid) { 2045 llvm::Optional<uint64_t> size = clang_type.GetBitSize(nullptr); 2046 if (!size) 2047 return false; 2048 llvm::APInt apint(*size, uval64, is_signed); 2049 template_param_infos.args.push_back( 2050 clang::TemplateArgument(ast, llvm::APSInt(apint, !is_signed), 2051 ClangUtil::GetQualType(clang_type))); 2052 } else { 2053 template_param_infos.args.push_back( 2054 clang::TemplateArgument(ClangUtil::GetQualType(clang_type))); 2055 } 2056 } else { 2057 auto *tplt_type = m_ast.CreateTemplateTemplateParmDecl(template_name); 2058 template_param_infos.names.push_back(name); 2059 template_param_infos.args.push_back( 2060 clang::TemplateArgument(clang::TemplateName(tplt_type))); 2061 } 2062 } 2063 } 2064 return true; 2065 2066 default: 2067 break; 2068 } 2069 return false; 2070 } 2071 2072 bool DWARFASTParserClang::ParseTemplateParameterInfos( 2073 const DWARFDIE &parent_die, 2074 TypeSystemClang::TemplateParameterInfos &template_param_infos) { 2075 2076 if (!parent_die) 2077 return false; 2078 2079 for (DWARFDIE die : parent_die.children()) { 2080 const dw_tag_t tag = die.Tag(); 2081 2082 switch (tag) { 2083 case DW_TAG_template_type_parameter: 2084 case DW_TAG_template_value_parameter: 2085 case DW_TAG_GNU_template_parameter_pack: 2086 case DW_TAG_GNU_template_template_param: 2087 ParseTemplateDIE(die, template_param_infos); 2088 break; 2089 2090 default: 2091 break; 2092 } 2093 } 2094 return template_param_infos.args.size() == template_param_infos.names.size(); 2095 } 2096 2097 bool DWARFASTParserClang::CompleteRecordType(const DWARFDIE &die, 2098 lldb_private::Type *type, 2099 CompilerType &clang_type) { 2100 const dw_tag_t tag = die.Tag(); 2101 SymbolFileDWARF *dwarf = die.GetDWARF(); 2102 2103 ClangASTImporter::LayoutInfo layout_info; 2104 2105 if (die.HasChildren()) { 2106 const bool type_is_objc_object_or_interface = 2107 TypeSystemClang::IsObjCObjectOrInterfaceType(clang_type); 2108 if (type_is_objc_object_or_interface) { 2109 // For objective C we don't start the definition when the class is 2110 // created. 2111 TypeSystemClang::StartTagDeclarationDefinition(clang_type); 2112 } 2113 2114 AccessType default_accessibility = eAccessNone; 2115 if (tag == DW_TAG_structure_type) { 2116 default_accessibility = eAccessPublic; 2117 } else if (tag == DW_TAG_union_type) { 2118 default_accessibility = eAccessPublic; 2119 } else if (tag == DW_TAG_class_type) { 2120 default_accessibility = eAccessPrivate; 2121 } 2122 2123 std::vector<std::unique_ptr<clang::CXXBaseSpecifier>> bases; 2124 // Parse members and base classes first 2125 std::vector<DWARFDIE> member_function_dies; 2126 2127 DelayedPropertyList delayed_properties; 2128 ParseChildMembers(die, clang_type, bases, member_function_dies, 2129 delayed_properties, default_accessibility, layout_info); 2130 2131 // Now parse any methods if there were any... 2132 for (const DWARFDIE &die : member_function_dies) 2133 dwarf->ResolveType(die); 2134 2135 if (type_is_objc_object_or_interface) { 2136 ConstString class_name(clang_type.GetTypeName()); 2137 if (class_name) { 2138 dwarf->GetObjCMethods(class_name, [&](DWARFDIE method_die) { 2139 method_die.ResolveType(); 2140 return true; 2141 }); 2142 2143 for (DelayedAddObjCClassProperty &property : delayed_properties) 2144 property.Finalize(); 2145 } 2146 } 2147 2148 if (!bases.empty()) { 2149 // Make sure all base classes refer to complete types and not forward 2150 // declarations. If we don't do this, clang will crash with an 2151 // assertion in the call to clang_type.TransferBaseClasses() 2152 for (const auto &base_class : bases) { 2153 clang::TypeSourceInfo *type_source_info = 2154 base_class->getTypeSourceInfo(); 2155 if (type_source_info) 2156 RequireCompleteType(m_ast.GetType(type_source_info->getType())); 2157 } 2158 2159 m_ast.TransferBaseClasses(clang_type.GetOpaqueQualType(), 2160 std::move(bases)); 2161 } 2162 } 2163 2164 m_ast.AddMethodOverridesForCXXRecordType(clang_type.GetOpaqueQualType()); 2165 TypeSystemClang::BuildIndirectFields(clang_type); 2166 TypeSystemClang::CompleteTagDeclarationDefinition(clang_type); 2167 2168 if (!layout_info.field_offsets.empty() || !layout_info.base_offsets.empty() || 2169 !layout_info.vbase_offsets.empty()) { 2170 if (type) 2171 layout_info.bit_size = type->GetByteSize(nullptr).getValueOr(0) * 8; 2172 if (layout_info.bit_size == 0) 2173 layout_info.bit_size = 2174 die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 0) * 8; 2175 2176 clang::CXXRecordDecl *record_decl = 2177 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 2178 if (record_decl) 2179 GetClangASTImporter().SetRecordLayout(record_decl, layout_info); 2180 } 2181 2182 return (bool)clang_type; 2183 } 2184 2185 bool DWARFASTParserClang::CompleteEnumType(const DWARFDIE &die, 2186 lldb_private::Type *type, 2187 CompilerType &clang_type) { 2188 if (TypeSystemClang::StartTagDeclarationDefinition(clang_type)) { 2189 if (die.HasChildren()) { 2190 bool is_signed = false; 2191 clang_type.IsIntegerType(is_signed); 2192 ParseChildEnumerators(clang_type, is_signed, 2193 type->GetByteSize(nullptr).getValueOr(0), die); 2194 } 2195 TypeSystemClang::CompleteTagDeclarationDefinition(clang_type); 2196 } 2197 return (bool)clang_type; 2198 } 2199 2200 bool DWARFASTParserClang::CompleteTypeFromDWARF(const DWARFDIE &die, 2201 lldb_private::Type *type, 2202 CompilerType &clang_type) { 2203 SymbolFileDWARF *dwarf = die.GetDWARF(); 2204 2205 std::lock_guard<std::recursive_mutex> guard( 2206 dwarf->GetObjectFile()->GetModule()->GetMutex()); 2207 2208 // Disable external storage for this type so we don't get anymore 2209 // clang::ExternalASTSource queries for this type. 2210 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), false); 2211 2212 if (!die) 2213 return false; 2214 2215 const dw_tag_t tag = die.Tag(); 2216 2217 Log *log = 2218 nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION)); 2219 if (log) 2220 dwarf->GetObjectFile()->GetModule()->LogMessageVerboseBacktrace( 2221 log, "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...", 2222 die.GetID(), die.GetTagAsCString(), type->GetName().AsCString()); 2223 assert(clang_type); 2224 DWARFAttributes attributes; 2225 switch (tag) { 2226 case DW_TAG_structure_type: 2227 case DW_TAG_union_type: 2228 case DW_TAG_class_type: 2229 return CompleteRecordType(die, type, clang_type); 2230 case DW_TAG_enumeration_type: 2231 return CompleteEnumType(die, type, clang_type); 2232 default: 2233 assert(false && "not a forward clang type decl!"); 2234 break; 2235 } 2236 2237 return false; 2238 } 2239 2240 void DWARFASTParserClang::EnsureAllDIEsInDeclContextHaveBeenParsed( 2241 lldb_private::CompilerDeclContext decl_context) { 2242 auto opaque_decl_ctx = 2243 (clang::DeclContext *)decl_context.GetOpaqueDeclContext(); 2244 for (auto it = m_decl_ctx_to_die.find(opaque_decl_ctx); 2245 it != m_decl_ctx_to_die.end() && it->first == opaque_decl_ctx; 2246 it = m_decl_ctx_to_die.erase(it)) 2247 for (DWARFDIE decl : it->second.children()) 2248 GetClangDeclForDIE(decl); 2249 } 2250 2251 CompilerDecl DWARFASTParserClang::GetDeclForUIDFromDWARF(const DWARFDIE &die) { 2252 clang::Decl *clang_decl = GetClangDeclForDIE(die); 2253 if (clang_decl != nullptr) 2254 return m_ast.GetCompilerDecl(clang_decl); 2255 return CompilerDecl(); 2256 } 2257 2258 CompilerDeclContext 2259 DWARFASTParserClang::GetDeclContextForUIDFromDWARF(const DWARFDIE &die) { 2260 clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE(die); 2261 if (clang_decl_ctx) 2262 return m_ast.CreateDeclContext(clang_decl_ctx); 2263 return CompilerDeclContext(); 2264 } 2265 2266 CompilerDeclContext 2267 DWARFASTParserClang::GetDeclContextContainingUIDFromDWARF(const DWARFDIE &die) { 2268 clang::DeclContext *clang_decl_ctx = 2269 GetClangDeclContextContainingDIE(die, nullptr); 2270 if (clang_decl_ctx) 2271 return m_ast.CreateDeclContext(clang_decl_ctx); 2272 return CompilerDeclContext(); 2273 } 2274 2275 size_t DWARFASTParserClang::ParseChildEnumerators( 2276 lldb_private::CompilerType &clang_type, bool is_signed, 2277 uint32_t enumerator_byte_size, const DWARFDIE &parent_die) { 2278 if (!parent_die) 2279 return 0; 2280 2281 size_t enumerators_added = 0; 2282 2283 for (DWARFDIE die : parent_die.children()) { 2284 const dw_tag_t tag = die.Tag(); 2285 if (tag == DW_TAG_enumerator) { 2286 DWARFAttributes attributes; 2287 const size_t num_child_attributes = die.GetAttributes(attributes); 2288 if (num_child_attributes > 0) { 2289 const char *name = nullptr; 2290 bool got_value = false; 2291 int64_t enum_value = 0; 2292 Declaration decl; 2293 2294 uint32_t i; 2295 for (i = 0; i < num_child_attributes; ++i) { 2296 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2297 DWARFFormValue form_value; 2298 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2299 switch (attr) { 2300 case DW_AT_const_value: 2301 got_value = true; 2302 if (is_signed) 2303 enum_value = form_value.Signed(); 2304 else 2305 enum_value = form_value.Unsigned(); 2306 break; 2307 2308 case DW_AT_name: 2309 name = form_value.AsCString(); 2310 break; 2311 2312 case DW_AT_description: 2313 default: 2314 case DW_AT_decl_file: 2315 decl.SetFile(attributes.CompileUnitAtIndex(i)->GetFile( 2316 form_value.Unsigned())); 2317 break; 2318 case DW_AT_decl_line: 2319 decl.SetLine(form_value.Unsigned()); 2320 break; 2321 case DW_AT_decl_column: 2322 decl.SetColumn(form_value.Unsigned()); 2323 break; 2324 case DW_AT_sibling: 2325 break; 2326 } 2327 } 2328 } 2329 2330 if (name && name[0] && got_value) { 2331 m_ast.AddEnumerationValueToEnumerationType( 2332 clang_type, decl, name, enum_value, enumerator_byte_size * 8); 2333 ++enumerators_added; 2334 } 2335 } 2336 } 2337 } 2338 return enumerators_added; 2339 } 2340 2341 Function * 2342 DWARFASTParserClang::ParseFunctionFromDWARF(CompileUnit &comp_unit, 2343 const DWARFDIE &die, 2344 const AddressRange &func_range) { 2345 assert(func_range.GetBaseAddress().IsValid()); 2346 DWARFRangeList func_ranges; 2347 const char *name = nullptr; 2348 const char *mangled = nullptr; 2349 int decl_file = 0; 2350 int decl_line = 0; 2351 int decl_column = 0; 2352 int call_file = 0; 2353 int call_line = 0; 2354 int call_column = 0; 2355 DWARFExpression frame_base; 2356 2357 const dw_tag_t tag = die.Tag(); 2358 2359 if (tag != DW_TAG_subprogram) 2360 return nullptr; 2361 2362 if (die.GetDIENamesAndRanges(name, mangled, func_ranges, decl_file, decl_line, 2363 decl_column, call_file, call_line, call_column, 2364 &frame_base)) { 2365 Mangled func_name; 2366 if (mangled) 2367 func_name.SetValue(ConstString(mangled), true); 2368 else if ((die.GetParent().Tag() == DW_TAG_compile_unit || 2369 die.GetParent().Tag() == DW_TAG_partial_unit) && 2370 Language::LanguageIsCPlusPlus( 2371 SymbolFileDWARF::GetLanguage(*die.GetCU())) && 2372 !Language::LanguageIsObjC( 2373 SymbolFileDWARF::GetLanguage(*die.GetCU())) && 2374 name && strcmp(name, "main") != 0) { 2375 // If the mangled name is not present in the DWARF, generate the 2376 // demangled name using the decl context. We skip if the function is 2377 // "main" as its name is never mangled. 2378 bool is_static = false; 2379 bool is_variadic = false; 2380 bool has_template_params = false; 2381 unsigned type_quals = 0; 2382 std::vector<CompilerType> param_types; 2383 std::vector<clang::ParmVarDecl *> param_decls; 2384 StreamString sstr; 2385 2386 DWARFDeclContext decl_ctx = SymbolFileDWARF::GetDWARFDeclContext(die); 2387 sstr << decl_ctx.GetQualifiedName(); 2388 2389 clang::DeclContext *containing_decl_ctx = 2390 GetClangDeclContextContainingDIE(die, nullptr); 2391 ParseChildParameters(containing_decl_ctx, die, true, is_static, 2392 is_variadic, has_template_params, param_types, 2393 param_decls, type_quals); 2394 sstr << "("; 2395 for (size_t i = 0; i < param_types.size(); i++) { 2396 if (i > 0) 2397 sstr << ", "; 2398 sstr << param_types[i].GetTypeName(); 2399 } 2400 if (is_variadic) 2401 sstr << ", ..."; 2402 sstr << ")"; 2403 if (type_quals & clang::Qualifiers::Const) 2404 sstr << " const"; 2405 2406 func_name.SetValue(ConstString(sstr.GetString()), false); 2407 } else 2408 func_name.SetValue(ConstString(name), false); 2409 2410 FunctionSP func_sp; 2411 std::unique_ptr<Declaration> decl_up; 2412 if (decl_file != 0 || decl_line != 0 || decl_column != 0) 2413 decl_up = std::make_unique<Declaration>(die.GetCU()->GetFile(decl_file), 2414 decl_line, decl_column); 2415 2416 SymbolFileDWARF *dwarf = die.GetDWARF(); 2417 // Supply the type _only_ if it has already been parsed 2418 Type *func_type = dwarf->GetDIEToType().lookup(die.GetDIE()); 2419 2420 assert(func_type == nullptr || func_type != DIE_IS_BEING_PARSED); 2421 2422 const user_id_t func_user_id = die.GetID(); 2423 func_sp = 2424 std::make_shared<Function>(&comp_unit, 2425 func_user_id, // UserID is the DIE offset 2426 func_user_id, func_name, func_type, 2427 func_range); // first address range 2428 2429 if (func_sp.get() != nullptr) { 2430 if (frame_base.IsValid()) 2431 func_sp->GetFrameBaseExpression() = frame_base; 2432 comp_unit.AddFunction(func_sp); 2433 return func_sp.get(); 2434 } 2435 } 2436 return nullptr; 2437 } 2438 2439 namespace { 2440 /// Parsed form of all attributes that are relevant for parsing type members. 2441 struct MemberAttributes { 2442 explicit MemberAttributes(const DWARFDIE &die, const DWARFDIE &parent_die, 2443 ModuleSP module_sp); 2444 const char *name = nullptr; 2445 /// Indicates how many bits into the word (according to the host endianness) 2446 /// the low-order bit of the field starts. Can be negative. 2447 int64_t bit_offset = 0; 2448 /// Indicates the size of the field in bits. 2449 size_t bit_size = 0; 2450 uint64_t data_bit_offset = UINT64_MAX; 2451 AccessType accessibility = eAccessNone; 2452 llvm::Optional<uint64_t> byte_size; 2453 DWARFFormValue encoding_form; 2454 /// Indicates the byte offset of the word from the base address of the 2455 /// structure. 2456 uint32_t member_byte_offset; 2457 bool is_artificial = false; 2458 /// On DW_TAG_members, this means the member is static. 2459 bool is_external = false; 2460 }; 2461 2462 /// Parsed form of all attributes that are relevant for parsing Objective-C 2463 /// properties. 2464 struct PropertyAttributes { 2465 explicit PropertyAttributes(const DWARFDIE &die); 2466 const char *prop_name = nullptr; 2467 const char *prop_getter_name = nullptr; 2468 const char *prop_setter_name = nullptr; 2469 /// \see clang::ObjCPropertyAttribute 2470 uint32_t prop_attributes = 0; 2471 }; 2472 } // namespace 2473 2474 MemberAttributes::MemberAttributes(const DWARFDIE &die, 2475 const DWARFDIE &parent_die, 2476 ModuleSP module_sp) { 2477 member_byte_offset = (parent_die.Tag() == DW_TAG_union_type) ? 0 : UINT32_MAX; 2478 2479 DWARFAttributes attributes; 2480 const size_t num_attributes = die.GetAttributes(attributes); 2481 for (std::size_t i = 0; i < num_attributes; ++i) { 2482 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2483 DWARFFormValue form_value; 2484 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2485 switch (attr) { 2486 case DW_AT_name: 2487 name = form_value.AsCString(); 2488 break; 2489 case DW_AT_type: 2490 encoding_form = form_value; 2491 break; 2492 case DW_AT_bit_offset: 2493 bit_offset = form_value.Signed(); 2494 break; 2495 case DW_AT_bit_size: 2496 bit_size = form_value.Unsigned(); 2497 break; 2498 case DW_AT_byte_size: 2499 byte_size = form_value.Unsigned(); 2500 break; 2501 case DW_AT_data_bit_offset: 2502 data_bit_offset = form_value.Unsigned(); 2503 break; 2504 case DW_AT_data_member_location: 2505 if (form_value.BlockData()) { 2506 Value initialValue(0); 2507 Value memberOffset(0); 2508 const DWARFDataExtractor &debug_info_data = die.GetData(); 2509 uint32_t block_length = form_value.Unsigned(); 2510 uint32_t block_offset = 2511 form_value.BlockData() - debug_info_data.GetDataStart(); 2512 if (DWARFExpression::Evaluate( 2513 nullptr, // ExecutionContext * 2514 nullptr, // RegisterContext * 2515 module_sp, 2516 DataExtractor(debug_info_data, block_offset, block_length), 2517 die.GetCU(), eRegisterKindDWARF, &initialValue, nullptr, 2518 memberOffset, nullptr)) { 2519 member_byte_offset = memberOffset.ResolveValue(nullptr).UInt(); 2520 } 2521 } else { 2522 // With DWARF 3 and later, if the value is an integer constant, 2523 // this form value is the offset in bytes from the beginning of 2524 // the containing entity. 2525 member_byte_offset = form_value.Unsigned(); 2526 } 2527 break; 2528 2529 case DW_AT_accessibility: 2530 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 2531 break; 2532 case DW_AT_artificial: 2533 is_artificial = form_value.Boolean(); 2534 break; 2535 case DW_AT_external: 2536 is_external = form_value.Boolean(); 2537 break; 2538 default: 2539 break; 2540 } 2541 } 2542 } 2543 2544 // Clang has a DWARF generation bug where sometimes it represents 2545 // fields that are references with bad byte size and bit size/offset 2546 // information such as: 2547 // 2548 // DW_AT_byte_size( 0x00 ) 2549 // DW_AT_bit_size( 0x40 ) 2550 // DW_AT_bit_offset( 0xffffffffffffffc0 ) 2551 // 2552 // So check the bit offset to make sure it is sane, and if the values 2553 // are not sane, remove them. If we don't do this then we will end up 2554 // with a crash if we try to use this type in an expression when clang 2555 // becomes unhappy with its recycled debug info. 2556 if (byte_size.getValueOr(0) == 0 && bit_offset < 0) { 2557 bit_size = 0; 2558 bit_offset = 0; 2559 } 2560 } 2561 2562 PropertyAttributes::PropertyAttributes(const DWARFDIE &die) { 2563 2564 DWARFAttributes attributes; 2565 const size_t num_attributes = die.GetAttributes(attributes); 2566 for (size_t i = 0; i < num_attributes; ++i) { 2567 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2568 DWARFFormValue form_value; 2569 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2570 switch (attr) { 2571 case DW_AT_APPLE_property_name: 2572 prop_name = form_value.AsCString(); 2573 break; 2574 case DW_AT_APPLE_property_getter: 2575 prop_getter_name = form_value.AsCString(); 2576 break; 2577 case DW_AT_APPLE_property_setter: 2578 prop_setter_name = form_value.AsCString(); 2579 break; 2580 case DW_AT_APPLE_property_attribute: 2581 prop_attributes = form_value.Unsigned(); 2582 break; 2583 default: 2584 break; 2585 } 2586 } 2587 } 2588 2589 if (!prop_name) 2590 return; 2591 ConstString fixed_setter; 2592 2593 // Check if the property getter/setter were provided as full names. 2594 // We want basenames, so we extract them. 2595 if (prop_getter_name && prop_getter_name[0] == '-') { 2596 ObjCLanguage::MethodName prop_getter_method(prop_getter_name, true); 2597 prop_getter_name = prop_getter_method.GetSelector().GetCString(); 2598 } 2599 2600 if (prop_setter_name && prop_setter_name[0] == '-') { 2601 ObjCLanguage::MethodName prop_setter_method(prop_setter_name, true); 2602 prop_setter_name = prop_setter_method.GetSelector().GetCString(); 2603 } 2604 2605 // If the names haven't been provided, they need to be filled in. 2606 if (!prop_getter_name) 2607 prop_getter_name = prop_name; 2608 if (!prop_setter_name && prop_name[0] && 2609 !(prop_attributes & DW_APPLE_PROPERTY_readonly)) { 2610 StreamString ss; 2611 2612 ss.Printf("set%c%s:", toupper(prop_name[0]), &prop_name[1]); 2613 2614 fixed_setter.SetString(ss.GetString()); 2615 prop_setter_name = fixed_setter.GetCString(); 2616 } 2617 } 2618 2619 void DWARFASTParserClang::ParseObjCProperty( 2620 const DWARFDIE &die, const DWARFDIE &parent_die, 2621 const lldb_private::CompilerType &class_clang_type, 2622 DelayedPropertyList &delayed_properties) { 2623 // This function can only parse DW_TAG_APPLE_property. 2624 assert(die.Tag() == DW_TAG_APPLE_property); 2625 2626 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule(); 2627 2628 const MemberAttributes attrs(die, parent_die, module_sp); 2629 const PropertyAttributes propAttrs(die); 2630 2631 if (!propAttrs.prop_name) { 2632 module_sp->ReportError( 2633 "0x%8.8" PRIx64 ": DW_TAG_APPLE_property has no name.", die.GetID()); 2634 return; 2635 } 2636 2637 Type *member_type = die.ResolveTypeUID(attrs.encoding_form.Reference()); 2638 if (!member_type) { 2639 module_sp->ReportError("0x%8.8" PRIx64 2640 ": DW_TAG_APPLE_property '%s' refers to type 0x%8.8x" 2641 " which was unable to be parsed", 2642 die.GetID(), propAttrs.prop_name, 2643 attrs.encoding_form.Reference().GetOffset()); 2644 return; 2645 } 2646 2647 ClangASTMetadata metadata; 2648 metadata.SetUserID(die.GetID()); 2649 delayed_properties.push_back(DelayedAddObjCClassProperty( 2650 class_clang_type, propAttrs.prop_name, 2651 member_type->GetLayoutCompilerType(), propAttrs.prop_setter_name, 2652 propAttrs.prop_getter_name, propAttrs.prop_attributes, &metadata)); 2653 } 2654 2655 void DWARFASTParserClang::ParseSingleMember( 2656 const DWARFDIE &die, const DWARFDIE &parent_die, 2657 const lldb_private::CompilerType &class_clang_type, 2658 lldb::AccessType default_accessibility, 2659 lldb_private::ClangASTImporter::LayoutInfo &layout_info, 2660 FieldInfo &last_field_info) { 2661 // This function can only parse DW_TAG_member. 2662 assert(die.Tag() == DW_TAG_member); 2663 2664 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule(); 2665 const dw_tag_t tag = die.Tag(); 2666 // Get the parent byte size so we can verify any members will fit 2667 const uint64_t parent_byte_size = 2668 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, UINT64_MAX); 2669 const uint64_t parent_bit_size = 2670 parent_byte_size == UINT64_MAX ? UINT64_MAX : parent_byte_size * 8; 2671 2672 // FIXME: Remove the workarounds below and make this const. 2673 MemberAttributes attrs(die, parent_die, module_sp); 2674 2675 const bool class_is_objc_object_or_interface = 2676 TypeSystemClang::IsObjCObjectOrInterfaceType(class_clang_type); 2677 2678 // FIXME: Make Clang ignore Objective-C accessibility for expressions 2679 if (class_is_objc_object_or_interface) 2680 attrs.accessibility = eAccessNone; 2681 2682 // Handle static members 2683 if (attrs.is_external && attrs.member_byte_offset == UINT32_MAX) { 2684 Type *var_type = die.ResolveTypeUID(attrs.encoding_form.Reference()); 2685 2686 if (var_type) { 2687 if (attrs.accessibility == eAccessNone) 2688 attrs.accessibility = eAccessPublic; 2689 TypeSystemClang::AddVariableToRecordType( 2690 class_clang_type, attrs.name, var_type->GetForwardCompilerType(), 2691 attrs.accessibility); 2692 } 2693 return; 2694 } 2695 2696 Type *member_type = die.ResolveTypeUID(attrs.encoding_form.Reference()); 2697 if (!member_type) { 2698 if (attrs.name) 2699 module_sp->ReportError( 2700 "0x%8.8" PRIx64 ": DW_TAG_member '%s' refers to type 0x%8.8x" 2701 " which was unable to be parsed", 2702 die.GetID(), attrs.name, attrs.encoding_form.Reference().GetOffset()); 2703 else 2704 module_sp->ReportError( 2705 "0x%8.8" PRIx64 ": DW_TAG_member refers to type 0x%8.8x" 2706 " which was unable to be parsed", 2707 die.GetID(), attrs.encoding_form.Reference().GetOffset()); 2708 return; 2709 } 2710 2711 const uint64_t character_width = 8; 2712 const uint64_t word_width = 32; 2713 CompilerType member_clang_type = member_type->GetLayoutCompilerType(); 2714 2715 if (attrs.accessibility == eAccessNone) 2716 attrs.accessibility = default_accessibility; 2717 2718 uint64_t field_bit_offset = (attrs.member_byte_offset == UINT32_MAX 2719 ? 0 2720 : (attrs.member_byte_offset * 8)); 2721 2722 if (attrs.bit_size > 0) { 2723 FieldInfo this_field_info; 2724 this_field_info.bit_offset = field_bit_offset; 2725 this_field_info.bit_size = attrs.bit_size; 2726 2727 if (attrs.data_bit_offset != UINT64_MAX) { 2728 this_field_info.bit_offset = attrs.data_bit_offset; 2729 } else { 2730 if (!attrs.byte_size) 2731 attrs.byte_size = member_type->GetByteSize(nullptr); 2732 2733 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 2734 if (objfile->GetByteOrder() == eByteOrderLittle) { 2735 this_field_info.bit_offset += attrs.byte_size.getValueOr(0) * 8; 2736 this_field_info.bit_offset -= (attrs.bit_offset + attrs.bit_size); 2737 } else { 2738 this_field_info.bit_offset += attrs.bit_offset; 2739 } 2740 } 2741 2742 // The ObjC runtime knows the byte offset but we still need to provide 2743 // the bit-offset in the layout. It just means something different then 2744 // what it does in C and C++. So we skip this check for ObjC types. 2745 // 2746 // We also skip this for fields of a union since they will all have a 2747 // zero offset. 2748 if (!TypeSystemClang::IsObjCObjectOrInterfaceType(class_clang_type) && 2749 !(parent_die.Tag() == DW_TAG_union_type && 2750 this_field_info.bit_offset == 0) && 2751 ((this_field_info.bit_offset >= parent_bit_size) || 2752 (last_field_info.IsBitfield() && 2753 !last_field_info.NextBitfieldOffsetIsValid( 2754 this_field_info.bit_offset)))) { 2755 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 2756 objfile->GetModule()->ReportWarning( 2757 "0x%8.8" PRIx64 ": %s bitfield named \"%s\" has invalid " 2758 "bit offset (0x%8.8" PRIx64 2759 ") member will be ignored. Please file a bug against the " 2760 "compiler and include the preprocessed output for %s\n", 2761 die.GetID(), DW_TAG_value_to_name(tag), attrs.name, 2762 this_field_info.bit_offset, GetUnitName(parent_die).c_str()); 2763 return; 2764 } 2765 2766 // Update the field bit offset we will report for layout 2767 field_bit_offset = this_field_info.bit_offset; 2768 2769 // Objective-C has invalid DW_AT_bit_offset values in older 2770 // versions of clang, so we have to be careful and only insert 2771 // unnamed bitfields if we have a new enough clang. 2772 bool detect_unnamed_bitfields = true; 2773 2774 if (class_is_objc_object_or_interface) 2775 detect_unnamed_bitfields = 2776 die.GetCU()->Supports_unnamed_objc_bitfields(); 2777 2778 if (detect_unnamed_bitfields) { 2779 llvm::Optional<FieldInfo> unnamed_field_info; 2780 uint64_t last_field_end = 0; 2781 2782 last_field_end = last_field_info.bit_offset + last_field_info.bit_size; 2783 2784 if (!last_field_info.IsBitfield()) { 2785 // The last field was not a bit-field... 2786 // but if it did take up the entire word then we need to extend 2787 // last_field_end so the bit-field does not step into the last 2788 // fields padding. 2789 if (last_field_end != 0 && ((last_field_end % word_width) != 0)) 2790 last_field_end += word_width - (last_field_end % word_width); 2791 } 2792 2793 // If we have a gap between the last_field_end and the current 2794 // field we have an unnamed bit-field. 2795 // If we have a base class, we assume there is no unnamed 2796 // bit-field if this is the first field since the gap can be 2797 // attributed to the members from the base class. This assumption 2798 // is not correct if the first field of the derived class is 2799 // indeed an unnamed bit-field. We currently do not have the 2800 // machinary to track the offset of the last field of classes we 2801 // have seen before, so we are not handling this case. 2802 if (this_field_info.bit_offset != last_field_end && 2803 this_field_info.bit_offset > last_field_end && 2804 !(last_field_info.bit_offset == 0 && 2805 last_field_info.bit_size == 0 && 2806 layout_info.base_offsets.size() != 0)) { 2807 unnamed_field_info = FieldInfo{}; 2808 unnamed_field_info->bit_size = 2809 this_field_info.bit_offset - last_field_end; 2810 unnamed_field_info->bit_offset = last_field_end; 2811 } 2812 2813 if (unnamed_field_info) { 2814 clang::FieldDecl *unnamed_bitfield_decl = 2815 TypeSystemClang::AddFieldToRecordType( 2816 class_clang_type, llvm::StringRef(), 2817 m_ast.GetBuiltinTypeForEncodingAndBitSize(eEncodingSint, 2818 word_width), 2819 attrs.accessibility, unnamed_field_info->bit_size); 2820 2821 layout_info.field_offsets.insert(std::make_pair( 2822 unnamed_bitfield_decl, unnamed_field_info->bit_offset)); 2823 } 2824 } 2825 2826 last_field_info = this_field_info; 2827 last_field_info.SetIsBitfield(true); 2828 } else { 2829 last_field_info.bit_offset = field_bit_offset; 2830 2831 if (llvm::Optional<uint64_t> clang_type_size = 2832 member_type->GetByteSize(nullptr)) { 2833 last_field_info.bit_size = *clang_type_size * character_width; 2834 } 2835 2836 last_field_info.SetIsBitfield(false); 2837 } 2838 2839 // Don't turn artificial members such as vtable pointers into real FieldDecls 2840 // in our AST. Clang will re-create those articial members and they would 2841 // otherwise just overlap in the layout with the FieldDecls we add here. 2842 // This needs to be done after updating FieldInfo which keeps track of where 2843 // field start/end so we don't later try to fill the the space of this 2844 // artificial member with (unnamed bitfield) padding. 2845 // FIXME: This check should verify that this is indeed an artificial member 2846 // we are supposed to ignore. 2847 if (attrs.is_artificial) 2848 return; 2849 2850 if (!member_clang_type.IsCompleteType()) 2851 member_clang_type.GetCompleteType(); 2852 2853 { 2854 // Older versions of clang emit array[0] and array[1] in the 2855 // same way (<rdar://problem/12566646>). If the current field 2856 // is at the end of the structure, then there is definitely no 2857 // room for extra elements and we override the type to 2858 // array[0]. 2859 2860 CompilerType member_array_element_type; 2861 uint64_t member_array_size; 2862 bool member_array_is_incomplete; 2863 2864 if (member_clang_type.IsArrayType(&member_array_element_type, 2865 &member_array_size, 2866 &member_array_is_incomplete) && 2867 !member_array_is_incomplete) { 2868 uint64_t parent_byte_size = 2869 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, UINT64_MAX); 2870 2871 if (attrs.member_byte_offset >= parent_byte_size) { 2872 if (member_array_size != 1 && 2873 (member_array_size != 0 || 2874 attrs.member_byte_offset > parent_byte_size)) { 2875 module_sp->ReportError( 2876 "0x%8.8" PRIx64 ": DW_TAG_member '%s' refers to type 0x%8.8x" 2877 " which extends beyond the bounds of 0x%8.8" PRIx64, 2878 die.GetID(), attrs.name, 2879 attrs.encoding_form.Reference().GetOffset(), 2880 parent_die.GetID()); 2881 } 2882 2883 member_clang_type = 2884 m_ast.CreateArrayType(member_array_element_type, 0, false); 2885 } 2886 } 2887 } 2888 2889 RequireCompleteType(member_clang_type); 2890 2891 clang::FieldDecl *field_decl = TypeSystemClang::AddFieldToRecordType( 2892 class_clang_type, attrs.name, member_clang_type, attrs.accessibility, 2893 attrs.bit_size); 2894 2895 m_ast.SetMetadataAsUserID(field_decl, die.GetID()); 2896 2897 layout_info.field_offsets.insert( 2898 std::make_pair(field_decl, field_bit_offset)); 2899 } 2900 2901 bool DWARFASTParserClang::ParseChildMembers( 2902 const DWARFDIE &parent_die, CompilerType &class_clang_type, 2903 std::vector<std::unique_ptr<clang::CXXBaseSpecifier>> &base_classes, 2904 std::vector<DWARFDIE> &member_function_dies, 2905 DelayedPropertyList &delayed_properties, 2906 const AccessType default_accessibility, 2907 ClangASTImporter::LayoutInfo &layout_info) { 2908 if (!parent_die) 2909 return false; 2910 2911 FieldInfo last_field_info; 2912 2913 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule(); 2914 TypeSystemClang *ast = 2915 llvm::dyn_cast_or_null<TypeSystemClang>(class_clang_type.GetTypeSystem()); 2916 if (ast == nullptr) 2917 return false; 2918 2919 for (DWARFDIE die : parent_die.children()) { 2920 dw_tag_t tag = die.Tag(); 2921 2922 switch (tag) { 2923 case DW_TAG_APPLE_property: 2924 ParseObjCProperty(die, parent_die, class_clang_type, delayed_properties); 2925 break; 2926 2927 case DW_TAG_member: 2928 ParseSingleMember(die, parent_die, class_clang_type, 2929 default_accessibility, layout_info, last_field_info); 2930 break; 2931 2932 case DW_TAG_subprogram: 2933 // Let the type parsing code handle this one for us. 2934 member_function_dies.push_back(die); 2935 break; 2936 2937 case DW_TAG_inheritance: 2938 ParseInheritance(die, parent_die, class_clang_type, default_accessibility, 2939 module_sp, base_classes, layout_info); 2940 break; 2941 2942 default: 2943 break; 2944 } 2945 } 2946 2947 return true; 2948 } 2949 2950 size_t DWARFASTParserClang::ParseChildParameters( 2951 clang::DeclContext *containing_decl_ctx, const DWARFDIE &parent_die, 2952 bool skip_artificial, bool &is_static, bool &is_variadic, 2953 bool &has_template_params, std::vector<CompilerType> &function_param_types, 2954 std::vector<clang::ParmVarDecl *> &function_param_decls, 2955 unsigned &type_quals) { 2956 if (!parent_die) 2957 return 0; 2958 2959 size_t arg_idx = 0; 2960 for (DWARFDIE die : parent_die.children()) { 2961 const dw_tag_t tag = die.Tag(); 2962 switch (tag) { 2963 case DW_TAG_formal_parameter: { 2964 DWARFAttributes attributes; 2965 const size_t num_attributes = die.GetAttributes(attributes); 2966 if (num_attributes > 0) { 2967 const char *name = nullptr; 2968 DWARFFormValue param_type_die_form; 2969 bool is_artificial = false; 2970 // one of None, Auto, Register, Extern, Static, PrivateExtern 2971 2972 clang::StorageClass storage = clang::SC_None; 2973 uint32_t i; 2974 for (i = 0; i < num_attributes; ++i) { 2975 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2976 DWARFFormValue form_value; 2977 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2978 switch (attr) { 2979 case DW_AT_name: 2980 name = form_value.AsCString(); 2981 break; 2982 case DW_AT_type: 2983 param_type_die_form = form_value; 2984 break; 2985 case DW_AT_artificial: 2986 is_artificial = form_value.Boolean(); 2987 break; 2988 case DW_AT_location: 2989 case DW_AT_const_value: 2990 case DW_AT_default_value: 2991 case DW_AT_description: 2992 case DW_AT_endianity: 2993 case DW_AT_is_optional: 2994 case DW_AT_segment: 2995 case DW_AT_variable_parameter: 2996 default: 2997 case DW_AT_abstract_origin: 2998 case DW_AT_sibling: 2999 break; 3000 } 3001 } 3002 } 3003 3004 bool skip = false; 3005 if (skip_artificial && is_artificial) { 3006 // In order to determine if a C++ member function is "const" we 3007 // have to look at the const-ness of "this"... 3008 if (arg_idx == 0 && 3009 DeclKindIsCXXClass(containing_decl_ctx->getDeclKind()) && 3010 // Often times compilers omit the "this" name for the 3011 // specification DIEs, so we can't rely upon the name being in 3012 // the formal parameter DIE... 3013 (name == nullptr || ::strcmp(name, "this") == 0)) { 3014 Type *this_type = 3015 die.ResolveTypeUID(param_type_die_form.Reference()); 3016 if (this_type) { 3017 uint32_t encoding_mask = this_type->GetEncodingMask(); 3018 if (encoding_mask & Type::eEncodingIsPointerUID) { 3019 is_static = false; 3020 3021 if (encoding_mask & (1u << Type::eEncodingIsConstUID)) 3022 type_quals |= clang::Qualifiers::Const; 3023 if (encoding_mask & (1u << Type::eEncodingIsVolatileUID)) 3024 type_quals |= clang::Qualifiers::Volatile; 3025 } 3026 } 3027 } 3028 skip = true; 3029 } 3030 3031 if (!skip) { 3032 Type *type = die.ResolveTypeUID(param_type_die_form.Reference()); 3033 if (type) { 3034 function_param_types.push_back(type->GetForwardCompilerType()); 3035 3036 clang::ParmVarDecl *param_var_decl = 3037 m_ast.CreateParameterDeclaration( 3038 containing_decl_ctx, GetOwningClangModule(die), name, 3039 type->GetForwardCompilerType(), storage); 3040 assert(param_var_decl); 3041 function_param_decls.push_back(param_var_decl); 3042 3043 m_ast.SetMetadataAsUserID(param_var_decl, die.GetID()); 3044 } 3045 } 3046 } 3047 arg_idx++; 3048 } break; 3049 3050 case DW_TAG_unspecified_parameters: 3051 is_variadic = true; 3052 break; 3053 3054 case DW_TAG_template_type_parameter: 3055 case DW_TAG_template_value_parameter: 3056 case DW_TAG_GNU_template_parameter_pack: 3057 // The one caller of this was never using the template_param_infos, and 3058 // the local variable was taking up a large amount of stack space in 3059 // SymbolFileDWARF::ParseType() so this was removed. If we ever need the 3060 // template params back, we can add them back. 3061 // ParseTemplateDIE (dwarf_cu, die, template_param_infos); 3062 has_template_params = true; 3063 break; 3064 3065 default: 3066 break; 3067 } 3068 } 3069 return arg_idx; 3070 } 3071 3072 llvm::Optional<SymbolFile::ArrayInfo> 3073 DWARFASTParser::ParseChildArrayInfo(const DWARFDIE &parent_die, 3074 const ExecutionContext *exe_ctx) { 3075 SymbolFile::ArrayInfo array_info; 3076 if (!parent_die) 3077 return llvm::None; 3078 3079 for (DWARFDIE die : parent_die.children()) { 3080 const dw_tag_t tag = die.Tag(); 3081 if (tag != DW_TAG_subrange_type) 3082 continue; 3083 3084 DWARFAttributes attributes; 3085 const size_t num_child_attributes = die.GetAttributes(attributes); 3086 if (num_child_attributes > 0) { 3087 uint64_t num_elements = 0; 3088 uint64_t lower_bound = 0; 3089 uint64_t upper_bound = 0; 3090 bool upper_bound_valid = false; 3091 uint32_t i; 3092 for (i = 0; i < num_child_attributes; ++i) { 3093 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3094 DWARFFormValue form_value; 3095 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3096 switch (attr) { 3097 case DW_AT_name: 3098 break; 3099 3100 case DW_AT_count: 3101 if (DWARFDIE var_die = die.GetReferencedDIE(DW_AT_count)) { 3102 if (var_die.Tag() == DW_TAG_variable) 3103 if (exe_ctx) { 3104 if (auto frame = exe_ctx->GetFrameSP()) { 3105 Status error; 3106 lldb::VariableSP var_sp; 3107 auto valobj_sp = frame->GetValueForVariableExpressionPath( 3108 var_die.GetName(), eNoDynamicValues, 0, var_sp, 3109 error); 3110 if (valobj_sp) { 3111 num_elements = valobj_sp->GetValueAsUnsigned(0); 3112 break; 3113 } 3114 } 3115 } 3116 } else 3117 num_elements = form_value.Unsigned(); 3118 break; 3119 3120 case DW_AT_bit_stride: 3121 array_info.bit_stride = form_value.Unsigned(); 3122 break; 3123 3124 case DW_AT_byte_stride: 3125 array_info.byte_stride = form_value.Unsigned(); 3126 break; 3127 3128 case DW_AT_lower_bound: 3129 lower_bound = form_value.Unsigned(); 3130 break; 3131 3132 case DW_AT_upper_bound: 3133 upper_bound_valid = true; 3134 upper_bound = form_value.Unsigned(); 3135 break; 3136 3137 default: 3138 case DW_AT_abstract_origin: 3139 case DW_AT_accessibility: 3140 case DW_AT_allocated: 3141 case DW_AT_associated: 3142 case DW_AT_data_location: 3143 case DW_AT_declaration: 3144 case DW_AT_description: 3145 case DW_AT_sibling: 3146 case DW_AT_threads_scaled: 3147 case DW_AT_type: 3148 case DW_AT_visibility: 3149 break; 3150 } 3151 } 3152 } 3153 3154 if (num_elements == 0) { 3155 if (upper_bound_valid && upper_bound >= lower_bound) 3156 num_elements = upper_bound - lower_bound + 1; 3157 } 3158 3159 array_info.element_orders.push_back(num_elements); 3160 } 3161 } 3162 return array_info; 3163 } 3164 3165 Type *DWARFASTParserClang::GetTypeForDIE(const DWARFDIE &die) { 3166 if (die) { 3167 SymbolFileDWARF *dwarf = die.GetDWARF(); 3168 DWARFAttributes attributes; 3169 const size_t num_attributes = die.GetAttributes(attributes); 3170 if (num_attributes > 0) { 3171 DWARFFormValue type_die_form; 3172 for (size_t i = 0; i < num_attributes; ++i) { 3173 dw_attr_t attr = attributes.AttributeAtIndex(i); 3174 DWARFFormValue form_value; 3175 3176 if (attr == DW_AT_type && 3177 attributes.ExtractFormValueAtIndex(i, form_value)) 3178 return dwarf->ResolveTypeUID(form_value.Reference(), true); 3179 } 3180 } 3181 } 3182 3183 return nullptr; 3184 } 3185 3186 clang::Decl *DWARFASTParserClang::GetClangDeclForDIE(const DWARFDIE &die) { 3187 if (!die) 3188 return nullptr; 3189 3190 switch (die.Tag()) { 3191 case DW_TAG_variable: 3192 case DW_TAG_constant: 3193 case DW_TAG_formal_parameter: 3194 case DW_TAG_imported_declaration: 3195 case DW_TAG_imported_module: 3196 break; 3197 default: 3198 return nullptr; 3199 } 3200 3201 DIEToDeclMap::iterator cache_pos = m_die_to_decl.find(die.GetDIE()); 3202 if (cache_pos != m_die_to_decl.end()) 3203 return cache_pos->second; 3204 3205 if (DWARFDIE spec_die = die.GetReferencedDIE(DW_AT_specification)) { 3206 clang::Decl *decl = GetClangDeclForDIE(spec_die); 3207 m_die_to_decl[die.GetDIE()] = decl; 3208 return decl; 3209 } 3210 3211 if (DWARFDIE abstract_origin_die = 3212 die.GetReferencedDIE(DW_AT_abstract_origin)) { 3213 clang::Decl *decl = GetClangDeclForDIE(abstract_origin_die); 3214 m_die_to_decl[die.GetDIE()] = decl; 3215 return decl; 3216 } 3217 3218 clang::Decl *decl = nullptr; 3219 switch (die.Tag()) { 3220 case DW_TAG_variable: 3221 case DW_TAG_constant: 3222 case DW_TAG_formal_parameter: { 3223 SymbolFileDWARF *dwarf = die.GetDWARF(); 3224 Type *type = GetTypeForDIE(die); 3225 if (dwarf && type) { 3226 const char *name = die.GetName(); 3227 clang::DeclContext *decl_context = 3228 TypeSystemClang::DeclContextGetAsDeclContext( 3229 dwarf->GetDeclContextContainingUID(die.GetID())); 3230 decl = m_ast.CreateVariableDeclaration( 3231 decl_context, GetOwningClangModule(die), name, 3232 ClangUtil::GetQualType(type->GetForwardCompilerType())); 3233 } 3234 break; 3235 } 3236 case DW_TAG_imported_declaration: { 3237 SymbolFileDWARF *dwarf = die.GetDWARF(); 3238 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3239 if (imported_uid) { 3240 CompilerDecl imported_decl = SymbolFileDWARF::GetDecl(imported_uid); 3241 if (imported_decl) { 3242 clang::DeclContext *decl_context = 3243 TypeSystemClang::DeclContextGetAsDeclContext( 3244 dwarf->GetDeclContextContainingUID(die.GetID())); 3245 if (clang::NamedDecl *clang_imported_decl = 3246 llvm::dyn_cast<clang::NamedDecl>( 3247 (clang::Decl *)imported_decl.GetOpaqueDecl())) 3248 decl = m_ast.CreateUsingDeclaration( 3249 decl_context, OptionalClangModuleID(), clang_imported_decl); 3250 } 3251 } 3252 break; 3253 } 3254 case DW_TAG_imported_module: { 3255 SymbolFileDWARF *dwarf = die.GetDWARF(); 3256 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3257 3258 if (imported_uid) { 3259 CompilerDeclContext imported_decl_ctx = 3260 SymbolFileDWARF::GetDeclContext(imported_uid); 3261 if (imported_decl_ctx) { 3262 clang::DeclContext *decl_context = 3263 TypeSystemClang::DeclContextGetAsDeclContext( 3264 dwarf->GetDeclContextContainingUID(die.GetID())); 3265 if (clang::NamespaceDecl *ns_decl = 3266 TypeSystemClang::DeclContextGetAsNamespaceDecl( 3267 imported_decl_ctx)) 3268 decl = m_ast.CreateUsingDirectiveDeclaration( 3269 decl_context, OptionalClangModuleID(), ns_decl); 3270 } 3271 } 3272 break; 3273 } 3274 default: 3275 break; 3276 } 3277 3278 m_die_to_decl[die.GetDIE()] = decl; 3279 3280 return decl; 3281 } 3282 3283 clang::DeclContext * 3284 DWARFASTParserClang::GetClangDeclContextForDIE(const DWARFDIE &die) { 3285 if (die) { 3286 clang::DeclContext *decl_ctx = GetCachedClangDeclContextForDIE(die); 3287 if (decl_ctx) 3288 return decl_ctx; 3289 3290 bool try_parsing_type = true; 3291 switch (die.Tag()) { 3292 case DW_TAG_compile_unit: 3293 case DW_TAG_partial_unit: 3294 decl_ctx = m_ast.GetTranslationUnitDecl(); 3295 try_parsing_type = false; 3296 break; 3297 3298 case DW_TAG_namespace: 3299 decl_ctx = ResolveNamespaceDIE(die); 3300 try_parsing_type = false; 3301 break; 3302 3303 case DW_TAG_lexical_block: 3304 decl_ctx = GetDeclContextForBlock(die); 3305 try_parsing_type = false; 3306 break; 3307 3308 default: 3309 break; 3310 } 3311 3312 if (decl_ctx == nullptr && try_parsing_type) { 3313 Type *type = die.GetDWARF()->ResolveType(die); 3314 if (type) 3315 decl_ctx = GetCachedClangDeclContextForDIE(die); 3316 } 3317 3318 if (decl_ctx) { 3319 LinkDeclContextToDIE(decl_ctx, die); 3320 return decl_ctx; 3321 } 3322 } 3323 return nullptr; 3324 } 3325 3326 OptionalClangModuleID 3327 DWARFASTParserClang::GetOwningClangModule(const DWARFDIE &die) { 3328 if (!die.IsValid()) 3329 return {}; 3330 3331 for (DWARFDIE parent = die.GetParent(); parent.IsValid(); 3332 parent = parent.GetParent()) { 3333 const dw_tag_t tag = parent.Tag(); 3334 if (tag == DW_TAG_module) { 3335 DWARFDIE module_die = parent; 3336 auto it = m_die_to_module.find(module_die.GetDIE()); 3337 if (it != m_die_to_module.end()) 3338 return it->second; 3339 const char *name = module_die.GetAttributeValueAsString(DW_AT_name, 0); 3340 if (!name) 3341 return {}; 3342 3343 OptionalClangModuleID id = 3344 m_ast.GetOrCreateClangModule(name, GetOwningClangModule(module_die)); 3345 m_die_to_module.insert({module_die.GetDIE(), id}); 3346 return id; 3347 } 3348 } 3349 return {}; 3350 } 3351 3352 static bool IsSubroutine(const DWARFDIE &die) { 3353 switch (die.Tag()) { 3354 case DW_TAG_subprogram: 3355 case DW_TAG_inlined_subroutine: 3356 return true; 3357 default: 3358 return false; 3359 } 3360 } 3361 3362 static DWARFDIE GetContainingFunctionWithAbstractOrigin(const DWARFDIE &die) { 3363 for (DWARFDIE candidate = die; candidate; candidate = candidate.GetParent()) { 3364 if (IsSubroutine(candidate)) { 3365 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3366 return candidate; 3367 } else { 3368 return DWARFDIE(); 3369 } 3370 } 3371 } 3372 assert(0 && "Shouldn't call GetContainingFunctionWithAbstractOrigin on " 3373 "something not in a function"); 3374 return DWARFDIE(); 3375 } 3376 3377 static DWARFDIE FindAnyChildWithAbstractOrigin(const DWARFDIE &context) { 3378 for (DWARFDIE candidate : context.children()) { 3379 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3380 return candidate; 3381 } 3382 } 3383 return DWARFDIE(); 3384 } 3385 3386 static DWARFDIE FindFirstChildWithAbstractOrigin(const DWARFDIE &block, 3387 const DWARFDIE &function) { 3388 assert(IsSubroutine(function)); 3389 for (DWARFDIE context = block; context != function.GetParent(); 3390 context = context.GetParent()) { 3391 assert(!IsSubroutine(context) || context == function); 3392 if (DWARFDIE child = FindAnyChildWithAbstractOrigin(context)) { 3393 return child; 3394 } 3395 } 3396 return DWARFDIE(); 3397 } 3398 3399 clang::DeclContext * 3400 DWARFASTParserClang::GetDeclContextForBlock(const DWARFDIE &die) { 3401 assert(die.Tag() == DW_TAG_lexical_block); 3402 DWARFDIE containing_function_with_abstract_origin = 3403 GetContainingFunctionWithAbstractOrigin(die); 3404 if (!containing_function_with_abstract_origin) { 3405 return (clang::DeclContext *)ResolveBlockDIE(die); 3406 } 3407 DWARFDIE child = FindFirstChildWithAbstractOrigin( 3408 die, containing_function_with_abstract_origin); 3409 CompilerDeclContext decl_context = 3410 GetDeclContextContainingUIDFromDWARF(child); 3411 return (clang::DeclContext *)decl_context.GetOpaqueDeclContext(); 3412 } 3413 3414 clang::BlockDecl *DWARFASTParserClang::ResolveBlockDIE(const DWARFDIE &die) { 3415 if (die && die.Tag() == DW_TAG_lexical_block) { 3416 clang::BlockDecl *decl = 3417 llvm::cast_or_null<clang::BlockDecl>(m_die_to_decl_ctx[die.GetDIE()]); 3418 3419 if (!decl) { 3420 DWARFDIE decl_context_die; 3421 clang::DeclContext *decl_context = 3422 GetClangDeclContextContainingDIE(die, &decl_context_die); 3423 decl = 3424 m_ast.CreateBlockDeclaration(decl_context, GetOwningClangModule(die)); 3425 3426 if (decl) 3427 LinkDeclContextToDIE((clang::DeclContext *)decl, die); 3428 } 3429 3430 return decl; 3431 } 3432 return nullptr; 3433 } 3434 3435 clang::NamespaceDecl * 3436 DWARFASTParserClang::ResolveNamespaceDIE(const DWARFDIE &die) { 3437 if (die && die.Tag() == DW_TAG_namespace) { 3438 // See if we already parsed this namespace DIE and associated it with a 3439 // uniqued namespace declaration 3440 clang::NamespaceDecl *namespace_decl = 3441 static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die.GetDIE()]); 3442 if (namespace_decl) 3443 return namespace_decl; 3444 else { 3445 const char *namespace_name = die.GetName(); 3446 clang::DeclContext *containing_decl_ctx = 3447 GetClangDeclContextContainingDIE(die, nullptr); 3448 bool is_inline = 3449 die.GetAttributeValueAsUnsigned(DW_AT_export_symbols, 0) != 0; 3450 3451 namespace_decl = m_ast.GetUniqueNamespaceDeclaration( 3452 namespace_name, containing_decl_ctx, GetOwningClangModule(die), 3453 is_inline); 3454 Log *log = 3455 nullptr; // (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 3456 if (log) { 3457 SymbolFileDWARF *dwarf = die.GetDWARF(); 3458 if (namespace_name) { 3459 dwarf->GetObjectFile()->GetModule()->LogMessage( 3460 log, 3461 "ASTContext => %p: 0x%8.8" PRIx64 3462 ": DW_TAG_namespace with DW_AT_name(\"%s\") => " 3463 "clang::NamespaceDecl *%p (original = %p)", 3464 static_cast<void *>(&m_ast.getASTContext()), die.GetID(), 3465 namespace_name, static_cast<void *>(namespace_decl), 3466 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3467 } else { 3468 dwarf->GetObjectFile()->GetModule()->LogMessage( 3469 log, 3470 "ASTContext => %p: 0x%8.8" PRIx64 3471 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p " 3472 "(original = %p)", 3473 static_cast<void *>(&m_ast.getASTContext()), die.GetID(), 3474 static_cast<void *>(namespace_decl), 3475 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3476 } 3477 } 3478 3479 if (namespace_decl) 3480 LinkDeclContextToDIE((clang::DeclContext *)namespace_decl, die); 3481 return namespace_decl; 3482 } 3483 } 3484 return nullptr; 3485 } 3486 3487 clang::DeclContext *DWARFASTParserClang::GetClangDeclContextContainingDIE( 3488 const DWARFDIE &die, DWARFDIE *decl_ctx_die_copy) { 3489 SymbolFileDWARF *dwarf = die.GetDWARF(); 3490 3491 DWARFDIE decl_ctx_die = dwarf->GetDeclContextDIEContainingDIE(die); 3492 3493 if (decl_ctx_die_copy) 3494 *decl_ctx_die_copy = decl_ctx_die; 3495 3496 if (decl_ctx_die) { 3497 clang::DeclContext *clang_decl_ctx = 3498 GetClangDeclContextForDIE(decl_ctx_die); 3499 if (clang_decl_ctx) 3500 return clang_decl_ctx; 3501 } 3502 return m_ast.GetTranslationUnitDecl(); 3503 } 3504 3505 clang::DeclContext * 3506 DWARFASTParserClang::GetCachedClangDeclContextForDIE(const DWARFDIE &die) { 3507 if (die) { 3508 DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find(die.GetDIE()); 3509 if (pos != m_die_to_decl_ctx.end()) 3510 return pos->second; 3511 } 3512 return nullptr; 3513 } 3514 3515 void DWARFASTParserClang::LinkDeclContextToDIE(clang::DeclContext *decl_ctx, 3516 const DWARFDIE &die) { 3517 m_die_to_decl_ctx[die.GetDIE()] = decl_ctx; 3518 // There can be many DIEs for a single decl context 3519 // m_decl_ctx_to_die[decl_ctx].insert(die.GetDIE()); 3520 m_decl_ctx_to_die.insert(std::make_pair(decl_ctx, die)); 3521 } 3522 3523 bool DWARFASTParserClang::CopyUniqueClassMethodTypes( 3524 const DWARFDIE &src_class_die, const DWARFDIE &dst_class_die, 3525 lldb_private::Type *class_type, std::vector<DWARFDIE> &failures) { 3526 if (!class_type || !src_class_die || !dst_class_die) 3527 return false; 3528 if (src_class_die.Tag() != dst_class_die.Tag()) 3529 return false; 3530 3531 // We need to complete the class type so we can get all of the method types 3532 // parsed so we can then unique those types to their equivalent counterparts 3533 // in "dst_cu" and "dst_class_die" 3534 class_type->GetFullCompilerType(); 3535 3536 DWARFDIE src_die; 3537 DWARFDIE dst_die; 3538 UniqueCStringMap<DWARFDIE> src_name_to_die; 3539 UniqueCStringMap<DWARFDIE> dst_name_to_die; 3540 UniqueCStringMap<DWARFDIE> src_name_to_die_artificial; 3541 UniqueCStringMap<DWARFDIE> dst_name_to_die_artificial; 3542 for (src_die = src_class_die.GetFirstChild(); src_die.IsValid(); 3543 src_die = src_die.GetSibling()) { 3544 if (src_die.Tag() == DW_TAG_subprogram) { 3545 // Make sure this is a declaration and not a concrete instance by looking 3546 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3547 // are placed inside the class definitions and shouldn't be included in 3548 // the list of things are are tracking here. 3549 if (src_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 3550 const char *src_name = src_die.GetMangledName(); 3551 if (src_name) { 3552 ConstString src_const_name(src_name); 3553 if (src_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3554 src_name_to_die_artificial.Append(src_const_name, src_die); 3555 else 3556 src_name_to_die.Append(src_const_name, src_die); 3557 } 3558 } 3559 } 3560 } 3561 for (dst_die = dst_class_die.GetFirstChild(); dst_die.IsValid(); 3562 dst_die = dst_die.GetSibling()) { 3563 if (dst_die.Tag() == DW_TAG_subprogram) { 3564 // Make sure this is a declaration and not a concrete instance by looking 3565 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3566 // are placed inside the class definitions and shouldn't be included in 3567 // the list of things are are tracking here. 3568 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 3569 const char *dst_name = dst_die.GetMangledName(); 3570 if (dst_name) { 3571 ConstString dst_const_name(dst_name); 3572 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3573 dst_name_to_die_artificial.Append(dst_const_name, dst_die); 3574 else 3575 dst_name_to_die.Append(dst_const_name, dst_die); 3576 } 3577 } 3578 } 3579 } 3580 const uint32_t src_size = src_name_to_die.GetSize(); 3581 const uint32_t dst_size = dst_name_to_die.GetSize(); 3582 Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | 3583 // DWARF_LOG_TYPE_COMPLETION)); 3584 3585 // Is everything kosher so we can go through the members at top speed? 3586 bool fast_path = true; 3587 3588 if (src_size != dst_size) { 3589 if (src_size != 0 && dst_size != 0) { 3590 LLDB_LOGF(log, 3591 "warning: trying to unique class DIE 0x%8.8x to 0x%8.8x, " 3592 "but they didn't have the same size (src=%d, dst=%d)", 3593 src_class_die.GetOffset(), dst_class_die.GetOffset(), src_size, 3594 dst_size); 3595 } 3596 3597 fast_path = false; 3598 } 3599 3600 uint32_t idx; 3601 3602 if (fast_path) { 3603 for (idx = 0; idx < src_size; ++idx) { 3604 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 3605 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3606 3607 if (src_die.Tag() != dst_die.Tag()) { 3608 LLDB_LOGF(log, 3609 "warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 3610 "but 0x%8.8x (%s) tags didn't match 0x%8.8x (%s)", 3611 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3612 src_die.GetOffset(), src_die.GetTagAsCString(), 3613 dst_die.GetOffset(), dst_die.GetTagAsCString()); 3614 fast_path = false; 3615 } 3616 3617 const char *src_name = src_die.GetMangledName(); 3618 const char *dst_name = dst_die.GetMangledName(); 3619 3620 // Make sure the names match 3621 if (src_name == dst_name || (strcmp(src_name, dst_name) == 0)) 3622 continue; 3623 3624 LLDB_LOGF(log, 3625 "warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 3626 "but 0x%8.8x (%s) names didn't match 0x%8.8x (%s)", 3627 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3628 src_die.GetOffset(), src_name, dst_die.GetOffset(), dst_name); 3629 3630 fast_path = false; 3631 } 3632 } 3633 3634 DWARFASTParserClang *src_dwarf_ast_parser = 3635 static_cast<DWARFASTParserClang *>( 3636 SymbolFileDWARF::GetDWARFParser(*src_die.GetCU())); 3637 DWARFASTParserClang *dst_dwarf_ast_parser = 3638 static_cast<DWARFASTParserClang *>( 3639 SymbolFileDWARF::GetDWARFParser(*dst_die.GetCU())); 3640 3641 // Now do the work of linking the DeclContexts and Types. 3642 if (fast_path) { 3643 // We can do this quickly. Just run across the tables index-for-index 3644 // since we know each node has matching names and tags. 3645 for (idx = 0; idx < src_size; ++idx) { 3646 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 3647 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3648 3649 clang::DeclContext *src_decl_ctx = 3650 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3651 if (src_decl_ctx) { 3652 LLDB_LOGF(log, "uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3653 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 3654 dst_die.GetOffset()); 3655 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 3656 } else { 3657 LLDB_LOGF(log, 3658 "warning: tried to unique decl context from 0x%8.8x for " 3659 "0x%8.8x, but none was found", 3660 src_die.GetOffset(), dst_die.GetOffset()); 3661 } 3662 3663 Type *src_child_type = 3664 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3665 if (src_child_type) { 3666 LLDB_LOGF(log, 3667 "uniquing type %p (uid=0x%" PRIx64 3668 ") from 0x%8.8x for 0x%8.8x", 3669 static_cast<void *>(src_child_type), src_child_type->GetID(), 3670 src_die.GetOffset(), dst_die.GetOffset()); 3671 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 3672 } else { 3673 LLDB_LOGF(log, 3674 "warning: tried to unique lldb_private::Type from " 3675 "0x%8.8x for 0x%8.8x, but none was found", 3676 src_die.GetOffset(), dst_die.GetOffset()); 3677 } 3678 } 3679 } else { 3680 // We must do this slowly. For each member of the destination, look up a 3681 // member in the source with the same name, check its tag, and unique them 3682 // if everything matches up. Report failures. 3683 3684 if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty()) { 3685 src_name_to_die.Sort(); 3686 3687 for (idx = 0; idx < dst_size; ++idx) { 3688 ConstString dst_name = dst_name_to_die.GetCStringAtIndex(idx); 3689 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3690 src_die = src_name_to_die.Find(dst_name, DWARFDIE()); 3691 3692 if (src_die && (src_die.Tag() == dst_die.Tag())) { 3693 clang::DeclContext *src_decl_ctx = 3694 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3695 if (src_decl_ctx) { 3696 LLDB_LOGF(log, "uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3697 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 3698 dst_die.GetOffset()); 3699 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 3700 } else { 3701 LLDB_LOGF(log, 3702 "warning: tried to unique decl context from 0x%8.8x " 3703 "for 0x%8.8x, but none was found", 3704 src_die.GetOffset(), dst_die.GetOffset()); 3705 } 3706 3707 Type *src_child_type = 3708 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3709 if (src_child_type) { 3710 LLDB_LOGF( 3711 log, 3712 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 3713 static_cast<void *>(src_child_type), src_child_type->GetID(), 3714 src_die.GetOffset(), dst_die.GetOffset()); 3715 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = 3716 src_child_type; 3717 } else { 3718 LLDB_LOGF(log, 3719 "warning: tried to unique lldb_private::Type from " 3720 "0x%8.8x for 0x%8.8x, but none was found", 3721 src_die.GetOffset(), dst_die.GetOffset()); 3722 } 3723 } else { 3724 LLDB_LOGF(log, "warning: couldn't find a match for 0x%8.8x", 3725 dst_die.GetOffset()); 3726 3727 failures.push_back(dst_die); 3728 } 3729 } 3730 } 3731 } 3732 3733 const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize(); 3734 const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize(); 3735 3736 if (src_size_artificial && dst_size_artificial) { 3737 dst_name_to_die_artificial.Sort(); 3738 3739 for (idx = 0; idx < src_size_artificial; ++idx) { 3740 ConstString src_name_artificial = 3741 src_name_to_die_artificial.GetCStringAtIndex(idx); 3742 src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 3743 dst_die = 3744 dst_name_to_die_artificial.Find(src_name_artificial, DWARFDIE()); 3745 3746 if (dst_die) { 3747 // Both classes have the artificial types, link them 3748 clang::DeclContext *src_decl_ctx = 3749 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3750 if (src_decl_ctx) { 3751 LLDB_LOGF(log, "uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3752 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 3753 dst_die.GetOffset()); 3754 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 3755 } else { 3756 LLDB_LOGF(log, 3757 "warning: tried to unique decl context from 0x%8.8x " 3758 "for 0x%8.8x, but none was found", 3759 src_die.GetOffset(), dst_die.GetOffset()); 3760 } 3761 3762 Type *src_child_type = 3763 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3764 if (src_child_type) { 3765 LLDB_LOGF( 3766 log, 3767 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 3768 static_cast<void *>(src_child_type), src_child_type->GetID(), 3769 src_die.GetOffset(), dst_die.GetOffset()); 3770 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 3771 } else { 3772 LLDB_LOGF(log, 3773 "warning: tried to unique lldb_private::Type from " 3774 "0x%8.8x for 0x%8.8x, but none was found", 3775 src_die.GetOffset(), dst_die.GetOffset()); 3776 } 3777 } 3778 } 3779 } 3780 3781 if (dst_size_artificial) { 3782 for (idx = 0; idx < dst_size_artificial; ++idx) { 3783 ConstString dst_name_artificial = 3784 dst_name_to_die_artificial.GetCStringAtIndex(idx); 3785 dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 3786 LLDB_LOGF(log, 3787 "warning: need to create artificial method for 0x%8.8x for " 3788 "method '%s'", 3789 dst_die.GetOffset(), dst_name_artificial.GetCString()); 3790 3791 failures.push_back(dst_die); 3792 } 3793 } 3794 3795 return !failures.empty(); 3796 } 3797