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