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