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 "SymbolFileDWARFDwo.h" 17 #include "SymbolFileDWARFDebugMap.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 "clang/AST/CXXInheritance.h" 39 #include "clang/AST/DeclCXX.h" 40 #include "clang/AST/DeclObjC.h" 41 #include "clang/AST/DeclTemplate.h" 42 43 #include <map> 44 #include <memory> 45 #include <vector> 46 47 //#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN 48 49 #ifdef ENABLE_DEBUG_PRINTF 50 #include <stdio.h> 51 #define DEBUG_PRINTF(fmt, ...) printf(fmt, __VA_ARGS__) 52 #else 53 #define DEBUG_PRINTF(fmt, ...) 54 #endif 55 56 using namespace lldb; 57 using namespace lldb_private; 58 DWARFASTParserClang::DWARFASTParserClang(TypeSystemClang &ast) 59 : m_ast(ast), m_die_to_decl_ctx(), m_decl_ctx_to_die() {} 60 61 DWARFASTParserClang::~DWARFASTParserClang() {} 62 63 static AccessType DW_ACCESS_to_AccessType(uint32_t dwarf_accessibility) { 64 switch (dwarf_accessibility) { 65 case DW_ACCESS_public: 66 return eAccessPublic; 67 case DW_ACCESS_private: 68 return eAccessPrivate; 69 case DW_ACCESS_protected: 70 return eAccessProtected; 71 default: 72 break; 73 } 74 return eAccessNone; 75 } 76 77 static bool DeclKindIsCXXClass(clang::Decl::Kind decl_kind) { 78 switch (decl_kind) { 79 case clang::Decl::CXXRecord: 80 case clang::Decl::ClassTemplateSpecialization: 81 return true; 82 default: 83 break; 84 } 85 return false; 86 } 87 88 89 ClangASTImporter &DWARFASTParserClang::GetClangASTImporter() { 90 if (!m_clang_ast_importer_up) { 91 m_clang_ast_importer_up.reset(new ClangASTImporter); 92 } 93 return *m_clang_ast_importer_up; 94 } 95 96 /// Detect a forward declaration that is nested in a DW_TAG_module. 97 static bool IsClangModuleFwdDecl(const DWARFDIE &Die) { 98 if (!Die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0)) 99 return false; 100 auto Parent = Die.GetParent(); 101 while (Parent.IsValid()) { 102 if (Parent.Tag() == DW_TAG_module) 103 return true; 104 Parent = Parent.GetParent(); 105 } 106 return false; 107 } 108 109 static DWARFDIE GetContainingClangModuleDIE(const DWARFDIE &die) { 110 if (die.IsValid()) { 111 DWARFDIE top_module_die; 112 // Now make sure this DIE is scoped in a DW_TAG_module tag and return true 113 // if so 114 for (DWARFDIE parent = die.GetParent(); parent.IsValid(); 115 parent = parent.GetParent()) { 116 const dw_tag_t tag = parent.Tag(); 117 if (tag == DW_TAG_module) 118 top_module_die = parent; 119 else if (tag == DW_TAG_compile_unit || tag == DW_TAG_partial_unit) 120 break; 121 } 122 123 return top_module_die; 124 } 125 return DWARFDIE(); 126 } 127 128 static lldb::ModuleSP GetContainingClangModule(const DWARFDIE &die) { 129 if (die.IsValid()) { 130 DWARFDIE clang_module_die = GetContainingClangModuleDIE(die); 131 132 if (clang_module_die) { 133 const char *module_name = clang_module_die.GetName(); 134 if (module_name) 135 return die.GetDWARF()->GetExternalModule( 136 lldb_private::ConstString(module_name)); 137 } 138 } 139 return lldb::ModuleSP(); 140 } 141 142 TypeSP DWARFASTParserClang::ParseTypeFromClangModule(const SymbolContext &sc, 143 const DWARFDIE &die, 144 Log *log) { 145 ModuleSP clang_module_sp = GetContainingClangModule(die); 146 if (!clang_module_sp) 147 return TypeSP(); 148 149 // If this type comes from a Clang module, recursively look in the 150 // DWARF section of the .pcm file in the module cache. Clang 151 // generates DWO skeleton units as breadcrumbs to find them. 152 llvm::SmallVector<CompilerContext, 4> decl_context; 153 die.GetDeclContext(decl_context); 154 TypeMap pcm_types; 155 156 // The type in the Clang module must have the same language as the current CU. 157 LanguageSet languages; 158 languages.Insert(SymbolFileDWARF::GetLanguage(*die.GetCU())); 159 llvm::DenseSet<SymbolFile *> searched_symbol_files; 160 clang_module_sp->GetSymbolFile()->FindTypes(decl_context, languages, 161 searched_symbol_files, pcm_types); 162 if (pcm_types.Empty()) { 163 // Since this type is defined in one of the Clang modules imported 164 // by this symbol file, search all of them. Instead of calling 165 // sym_file->FindTypes(), which would return this again, go straight 166 // to the imported modules. 167 auto &sym_file = die.GetCU()->GetSymbolFileDWARF(); 168 169 // Well-formed clang modules never form cycles; guard against corrupted 170 // ones by inserting the current file. 171 searched_symbol_files.insert(&sym_file); 172 sym_file.ForEachExternalModule( 173 *sc.comp_unit, searched_symbol_files, [&](Module &module) { 174 module.GetSymbolFile()->FindTypes(decl_context, languages, 175 searched_symbol_files, pcm_types); 176 return pcm_types.GetSize(); 177 }); 178 } 179 180 if (!pcm_types.GetSize()) 181 return TypeSP(); 182 183 // We found a real definition for this type in the Clang module, so lets use 184 // it and cache the fact that we found a complete type for this die. 185 TypeSP pcm_type_sp = pcm_types.GetTypeAtIndex(0); 186 if (!pcm_type_sp) 187 return TypeSP(); 188 189 lldb_private::CompilerType pcm_type = pcm_type_sp->GetForwardCompilerType(); 190 lldb_private::CompilerType type = 191 GetClangASTImporter().CopyType(m_ast, pcm_type); 192 193 if (!type) 194 return TypeSP(); 195 196 // Under normal operation pcm_type is a shallow forward declaration 197 // that gets completed later. This is necessary to support cyclic 198 // data structures. If, however, pcm_type is already complete (for 199 // example, because it was loaded for a different target before), 200 // the definition needs to be imported right away, too. 201 // Type::ResolveClangType() effectively ignores the ResolveState 202 // inside type_sp and only looks at IsDefined(), so it never calls 203 // ClangASTImporter::ASTImporterDelegate::ImportDefinitionTo(), 204 // which does extra work for Objective-C classes. This would result 205 // in only the forward declaration to be visible. 206 if (pcm_type.IsDefined()) 207 GetClangASTImporter().RequireCompleteType(ClangUtil::GetQualType(type)); 208 209 SymbolFileDWARF *dwarf = die.GetDWARF(); 210 TypeSP type_sp(new Type( 211 die.GetID(), dwarf, pcm_type_sp->GetName(), pcm_type_sp->GetByteSize(), 212 nullptr, LLDB_INVALID_UID, Type::eEncodingInvalid, 213 &pcm_type_sp->GetDeclaration(), type, Type::ResolveState::Forward)); 214 215 dwarf->GetTypeList().Insert(type_sp); 216 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 217 clang::TagDecl *tag_decl = TypeSystemClang::GetAsTagDecl(type); 218 if (tag_decl) 219 LinkDeclContextToDIE(tag_decl, die); 220 else { 221 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE(die); 222 if (defn_decl_ctx) 223 LinkDeclContextToDIE(defn_decl_ctx, die); 224 } 225 226 return type_sp; 227 } 228 229 static void CompleteExternalTagDeclType(TypeSystemClang &ast, 230 ClangASTImporter &ast_importer, 231 clang::DeclContext *decl_ctx, 232 DWARFDIE die, 233 const char *type_name_cstr) { 234 auto *tag_decl_ctx = clang::dyn_cast<clang::TagDecl>(decl_ctx); 235 if (!tag_decl_ctx) 236 return; 237 238 // If this type was not imported from an external AST, there's nothing to do. 239 CompilerType type = ast.GetTypeForDecl(tag_decl_ctx); 240 if (!type || !ast_importer.CanImport(type)) 241 return; 242 243 auto qual_type = ClangUtil::GetQualType(type); 244 if (!ast_importer.RequireCompleteType(qual_type)) { 245 die.GetDWARF()->GetObjectFile()->GetModule()->ReportError( 246 "Unable to complete the Decl context for DIE '%s' at offset " 247 "0x%8.8x.\nPlease file a bug report.", 248 type_name_cstr ? type_name_cstr : "", die.GetOffset()); 249 // We need to make the type look complete otherwise, we might crash in 250 // Clang when adding children. 251 if (TypeSystemClang::StartTagDeclarationDefinition(type)) 252 TypeSystemClang::CompleteTagDeclarationDefinition(type); 253 } 254 } 255 256 ParsedDWARFTypeAttributes::ParsedDWARFTypeAttributes(const DWARFDIE &die) { 257 DWARFAttributes attributes; 258 size_t num_attributes = die.GetAttributes(attributes); 259 for (size_t i = 0; i < num_attributes; ++i) { 260 dw_attr_t attr = attributes.AttributeAtIndex(i); 261 DWARFFormValue form_value; 262 if (!attributes.ExtractFormValueAtIndex(i, form_value)) 263 continue; 264 switch (attr) { 265 case DW_AT_abstract_origin: 266 abstract_origin = form_value; 267 break; 268 269 case DW_AT_accessibility: 270 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 271 break; 272 273 case DW_AT_artificial: 274 is_artificial = form_value.Boolean(); 275 break; 276 277 case DW_AT_bit_stride: 278 bit_stride = form_value.Unsigned(); 279 break; 280 281 case DW_AT_byte_size: 282 byte_size = form_value.Unsigned(); 283 break; 284 285 case DW_AT_byte_stride: 286 byte_stride = form_value.Unsigned(); 287 break; 288 289 case DW_AT_calling_convention: 290 calling_convention = form_value.Unsigned(); 291 break; 292 293 case DW_AT_containing_type: 294 containing_type = form_value; 295 break; 296 297 case DW_AT_decl_file: 298 decl.SetFile(die.GetCU()->GetFile(form_value.Unsigned())); 299 break; 300 case DW_AT_decl_line: 301 decl.SetLine(form_value.Unsigned()); 302 break; 303 case DW_AT_decl_column: 304 decl.SetColumn(form_value.Unsigned()); 305 break; 306 307 case DW_AT_declaration: 308 is_forward_declaration = form_value.Boolean(); 309 break; 310 311 case DW_AT_encoding: 312 encoding = form_value.Unsigned(); 313 break; 314 315 case DW_AT_enum_class: 316 is_scoped_enum = form_value.Boolean(); 317 break; 318 319 case DW_AT_explicit: 320 is_explicit = form_value.Boolean(); 321 break; 322 323 case DW_AT_external: 324 if (form_value.Unsigned()) 325 storage = clang::SC_Extern; 326 break; 327 328 case DW_AT_inline: 329 is_inline = form_value.Boolean(); 330 break; 331 332 case DW_AT_linkage_name: 333 case DW_AT_MIPS_linkage_name: 334 mangled_name = form_value.AsCString(); 335 break; 336 337 case DW_AT_name: 338 name.SetCString(form_value.AsCString()); 339 break; 340 341 case DW_AT_object_pointer: 342 object_pointer = form_value.Reference(); 343 break; 344 345 case DW_AT_signature: 346 signature = form_value; 347 break; 348 349 case DW_AT_specification: 350 specification = form_value; 351 break; 352 353 case DW_AT_type: 354 type = form_value; 355 break; 356 357 case DW_AT_virtuality: 358 is_virtual = form_value.Boolean(); 359 break; 360 361 case DW_AT_APPLE_objc_complete_type: 362 is_complete_objc_class = form_value.Signed(); 363 break; 364 365 case DW_AT_APPLE_objc_direct: 366 is_objc_direct_call = true; 367 break; 368 369 case DW_AT_APPLE_runtime_class: 370 class_language = (LanguageType)form_value.Signed(); 371 break; 372 373 case DW_AT_GNU_vector: 374 is_vector = form_value.Boolean(); 375 break; 376 case DW_AT_export_symbols: 377 exports_symbols = form_value.Boolean(); 378 break; 379 } 380 } 381 } 382 383 static std::string GetUnitName(const DWARFDIE &die) { 384 if (DWARFUnit *unit = die.GetCU()) 385 return unit->GetAbsolutePath().GetPath(); 386 return "<missing DWARF unit path>"; 387 } 388 389 TypeSP DWARFASTParserClang::ParseTypeFromDWARF(const SymbolContext &sc, 390 const DWARFDIE &die, 391 bool *type_is_new_ptr) { 392 if (type_is_new_ptr) 393 *type_is_new_ptr = false; 394 395 if (!die) 396 return nullptr; 397 398 Log *log(LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION | 399 DWARF_LOG_LOOKUPS)); 400 401 SymbolFileDWARF *dwarf = die.GetDWARF(); 402 if (log) { 403 DWARFDIE context_die; 404 clang::DeclContext *context = 405 GetClangDeclContextContainingDIE(die, &context_die); 406 407 dwarf->GetObjectFile()->GetModule()->LogMessage( 408 log, 409 "DWARFASTParserClang::ParseTypeFromDWARF " 410 "(die = 0x%8.8x, decl_ctx = %p (die 0x%8.8x)) %s name = '%s')", 411 die.GetOffset(), static_cast<void *>(context), context_die.GetOffset(), 412 die.GetTagAsCString(), die.GetName()); 413 } 414 415 Type *type_ptr = dwarf->GetDIEToType().lookup(die.GetDIE()); 416 if (type_ptr == DIE_IS_BEING_PARSED) 417 return nullptr; 418 if (type_ptr) 419 return type_ptr->shared_from_this(); 420 // Set a bit that lets us know that we are currently parsing this 421 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 422 423 ParsedDWARFTypeAttributes attrs(die); 424 425 if (DWARFDIE signature_die = attrs.signature.Reference()) { 426 if (TypeSP type_sp = 427 ParseTypeFromDWARF(sc, signature_die, type_is_new_ptr)) { 428 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 429 if (clang::DeclContext *decl_ctx = 430 GetCachedClangDeclContextForDIE(signature_die)) 431 LinkDeclContextToDIE(decl_ctx, die); 432 return type_sp; 433 } 434 return nullptr; 435 } 436 437 if (type_is_new_ptr) 438 *type_is_new_ptr = true; 439 440 const dw_tag_t tag = die.Tag(); 441 442 TypeSP type_sp; 443 444 switch (tag) { 445 case DW_TAG_typedef: 446 case DW_TAG_base_type: 447 case DW_TAG_pointer_type: 448 case DW_TAG_reference_type: 449 case DW_TAG_rvalue_reference_type: 450 case DW_TAG_const_type: 451 case DW_TAG_restrict_type: 452 case DW_TAG_volatile_type: 453 case DW_TAG_atomic_type: 454 case DW_TAG_unspecified_type: { 455 type_sp = ParseTypeModifier(sc, die, attrs); 456 break; 457 } 458 459 case DW_TAG_structure_type: 460 case DW_TAG_union_type: 461 case DW_TAG_class_type: { 462 type_sp = ParseStructureLikeDIE(sc, die, attrs); 463 break; 464 } 465 466 case DW_TAG_enumeration_type: { 467 type_sp = ParseEnum(sc, die, attrs); 468 break; 469 } 470 471 case DW_TAG_inlined_subroutine: 472 case DW_TAG_subprogram: 473 case DW_TAG_subroutine_type: { 474 type_sp = ParseSubroutine(die, attrs); 475 break; 476 } 477 case DW_TAG_array_type: { 478 type_sp = ParseArrayType(die, attrs); 479 break; 480 } 481 case DW_TAG_ptr_to_member_type: { 482 type_sp = ParsePointerToMemberType(die, attrs); 483 break; 484 } 485 default: 486 dwarf->GetObjectFile()->GetModule()->ReportError( 487 "{0x%8.8x}: unhandled type tag 0x%4.4x (%s), please file a bug and " 488 "attach the file at the start of this error message", 489 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 490 break; 491 } 492 493 // TODO: We should consider making the switch above exhaustive to simplify 494 // control flow in ParseTypeFromDWARF. Then, we could simply replace this 495 // return statement with a call to llvm_unreachable. 496 return UpdateSymbolContextScopeForType(sc, die, type_sp); 497 } 498 499 lldb::TypeSP 500 DWARFASTParserClang::ParseTypeModifier(const SymbolContext &sc, 501 const DWARFDIE &die, 502 ParsedDWARFTypeAttributes &attrs) { 503 Log *log(LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION | 504 DWARF_LOG_LOOKUPS)); 505 SymbolFileDWARF *dwarf = die.GetDWARF(); 506 const dw_tag_t tag = die.Tag(); 507 LanguageType cu_language = SymbolFileDWARF::GetLanguage(*die.GetCU()); 508 Type::ResolveState resolve_state = Type::ResolveState::Unresolved; 509 Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID; 510 TypeSP type_sp; 511 CompilerType clang_type; 512 513 if (tag == DW_TAG_typedef && attrs.type.IsValid()) { 514 // Try to parse a typedef from the (DWARF embedded in the) Clang 515 // module file first as modules can contain typedef'ed 516 // structures that have no names like: 517 // 518 // typedef struct { int a; } Foo; 519 // 520 // In this case we will have a structure with no name and a 521 // typedef named "Foo" that points to this unnamed 522 // structure. The name in the typedef is the only identifier for 523 // the struct, so always try to get typedefs from Clang modules 524 // if possible. 525 // 526 // The type_sp returned will be empty if the typedef doesn't 527 // exist in a module file, so it is cheap to call this function 528 // just to check. 529 // 530 // If we don't do this we end up creating a TypeSP that says 531 // this is a typedef to type 0x123 (the DW_AT_type value would 532 // be 0x123 in the DW_TAG_typedef), and this is the unnamed 533 // structure type. We will have a hard time tracking down an 534 // unnammed structure type in the module debug info, so we make 535 // sure we don't get into this situation by always resolving 536 // typedefs from the module. 537 const DWARFDIE encoding_die = attrs.type.Reference(); 538 539 // First make sure that the die that this is typedef'ed to _is_ 540 // just a declaration (DW_AT_declaration == 1), not a full 541 // definition since template types can't be represented in 542 // modules since only concrete instances of templates are ever 543 // emitted and modules won't contain those 544 if (encoding_die && 545 encoding_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 546 type_sp = ParseTypeFromClangModule(sc, die, log); 547 if (type_sp) 548 return type_sp; 549 } 550 } 551 552 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\") type => 0x%8.8lx\n", die.GetID(), 553 DW_TAG_value_to_name(tag), type_name_cstr, 554 encoding_uid.Reference()); 555 556 switch (tag) { 557 default: 558 break; 559 560 case DW_TAG_unspecified_type: 561 if (attrs.name == "nullptr_t" || attrs.name == "decltype(nullptr)") { 562 resolve_state = Type::ResolveState::Full; 563 clang_type = m_ast.GetBasicType(eBasicTypeNullPtr); 564 break; 565 } 566 // Fall through to base type below in case we can handle the type 567 // there... 568 LLVM_FALLTHROUGH; 569 570 case DW_TAG_base_type: 571 resolve_state = Type::ResolveState::Full; 572 clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize( 573 attrs.name.GetStringRef(), attrs.encoding, 574 attrs.byte_size.getValueOr(0) * 8); 575 break; 576 577 case DW_TAG_pointer_type: 578 encoding_data_type = Type::eEncodingIsPointerUID; 579 break; 580 case DW_TAG_reference_type: 581 encoding_data_type = Type::eEncodingIsLValueReferenceUID; 582 break; 583 case DW_TAG_rvalue_reference_type: 584 encoding_data_type = Type::eEncodingIsRValueReferenceUID; 585 break; 586 case DW_TAG_typedef: 587 encoding_data_type = Type::eEncodingIsTypedefUID; 588 break; 589 case DW_TAG_const_type: 590 encoding_data_type = Type::eEncodingIsConstUID; 591 break; 592 case DW_TAG_restrict_type: 593 encoding_data_type = Type::eEncodingIsRestrictUID; 594 break; 595 case DW_TAG_volatile_type: 596 encoding_data_type = Type::eEncodingIsVolatileUID; 597 break; 598 case DW_TAG_atomic_type: 599 encoding_data_type = Type::eEncodingIsAtomicUID; 600 break; 601 } 602 603 if (!clang_type && (encoding_data_type == Type::eEncodingIsPointerUID || 604 encoding_data_type == Type::eEncodingIsTypedefUID)) { 605 if (tag == DW_TAG_pointer_type) { 606 DWARFDIE target_die = die.GetReferencedDIE(DW_AT_type); 607 608 if (target_die.GetAttributeValueAsUnsigned(DW_AT_APPLE_block, 0)) { 609 // Blocks have a __FuncPtr inside them which is a pointer to a 610 // function of the proper type. 611 612 for (DWARFDIE child_die = target_die.GetFirstChild(); 613 child_die.IsValid(); child_die = child_die.GetSibling()) { 614 if (!strcmp(child_die.GetAttributeValueAsString(DW_AT_name, ""), 615 "__FuncPtr")) { 616 DWARFDIE function_pointer_type = 617 child_die.GetReferencedDIE(DW_AT_type); 618 619 if (function_pointer_type) { 620 DWARFDIE function_type = 621 function_pointer_type.GetReferencedDIE(DW_AT_type); 622 623 bool function_type_is_new_pointer; 624 TypeSP lldb_function_type_sp = ParseTypeFromDWARF( 625 sc, function_type, &function_type_is_new_pointer); 626 627 if (lldb_function_type_sp) { 628 clang_type = m_ast.CreateBlockPointerType( 629 lldb_function_type_sp->GetForwardCompilerType()); 630 encoding_data_type = Type::eEncodingIsUID; 631 attrs.type.Clear(); 632 resolve_state = Type::ResolveState::Full; 633 } 634 } 635 636 break; 637 } 638 } 639 } 640 } 641 642 if (cu_language == eLanguageTypeObjC || 643 cu_language == eLanguageTypeObjC_plus_plus) { 644 if (attrs.name) { 645 if (attrs.name == "id") { 646 if (log) 647 dwarf->GetObjectFile()->GetModule()->LogMessage( 648 log, 649 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 650 "is Objective-C 'id' built-in type.", 651 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 652 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 653 encoding_data_type = Type::eEncodingIsUID; 654 attrs.type.Clear(); 655 resolve_state = Type::ResolveState::Full; 656 } else if (attrs.name == "Class") { 657 if (log) 658 dwarf->GetObjectFile()->GetModule()->LogMessage( 659 log, 660 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 661 "is Objective-C 'Class' built-in type.", 662 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 663 clang_type = m_ast.GetBasicType(eBasicTypeObjCClass); 664 encoding_data_type = Type::eEncodingIsUID; 665 attrs.type.Clear(); 666 resolve_state = Type::ResolveState::Full; 667 } else if (attrs.name == "SEL") { 668 if (log) 669 dwarf->GetObjectFile()->GetModule()->LogMessage( 670 log, 671 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 672 "is Objective-C 'selector' built-in type.", 673 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 674 clang_type = m_ast.GetBasicType(eBasicTypeObjCSel); 675 encoding_data_type = Type::eEncodingIsUID; 676 attrs.type.Clear(); 677 resolve_state = Type::ResolveState::Full; 678 } 679 } else if (encoding_data_type == Type::eEncodingIsPointerUID && 680 attrs.type.IsValid()) { 681 // Clang sometimes erroneously emits id as objc_object*. In that 682 // case we fix up the type to "id". 683 684 const DWARFDIE encoding_die = attrs.type.Reference(); 685 686 if (encoding_die && encoding_die.Tag() == DW_TAG_structure_type) { 687 llvm::StringRef struct_name = encoding_die.GetName(); 688 if (struct_name == "objc_object") { 689 if (log) 690 dwarf->GetObjectFile()->GetModule()->LogMessage( 691 log, 692 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s " 693 "'%s' is 'objc_object*', which we overrode to " 694 "'id'.", 695 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 696 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 697 encoding_data_type = Type::eEncodingIsUID; 698 attrs.type.Clear(); 699 resolve_state = Type::ResolveState::Full; 700 } 701 } 702 } 703 } 704 } 705 706 type_sp = std::make_shared<Type>( 707 die.GetID(), dwarf, attrs.name, attrs.byte_size, nullptr, 708 dwarf->GetUID(attrs.type.Reference()), encoding_data_type, &attrs.decl, 709 clang_type, resolve_state); 710 711 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 712 return type_sp; 713 } 714 715 TypeSP DWARFASTParserClang::ParseEnum(const SymbolContext &sc, 716 const DWARFDIE &die, 717 ParsedDWARFTypeAttributes &attrs) { 718 Log *log(LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION | 719 DWARF_LOG_LOOKUPS)); 720 SymbolFileDWARF *dwarf = die.GetDWARF(); 721 const dw_tag_t tag = die.Tag(); 722 TypeSP type_sp; 723 724 if (attrs.is_forward_declaration) { 725 type_sp = ParseTypeFromClangModule(sc, die, log); 726 if (type_sp) 727 return type_sp; 728 729 DWARFDeclContext die_decl_ctx = SymbolFileDWARF::GetDWARFDeclContext(die); 730 731 type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx); 732 733 if (!type_sp) { 734 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 735 if (debug_map_symfile) { 736 // We weren't able to find a full declaration in this DWARF, 737 // see if we have a declaration anywhere else... 738 type_sp = debug_map_symfile->FindDefinitionTypeForDWARFDeclContext( 739 die_decl_ctx); 740 } 741 } 742 743 if (type_sp) { 744 if (log) { 745 dwarf->GetObjectFile()->GetModule()->LogMessage( 746 log, 747 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 748 "forward declaration, complete type is 0x%8.8" PRIx64, 749 static_cast<void *>(this), die.GetOffset(), 750 DW_TAG_value_to_name(tag), attrs.name.GetCString(), 751 type_sp->GetID()); 752 } 753 754 // We found a real definition for this type elsewhere so lets use 755 // it and cache the fact that we found a complete type for this 756 // die 757 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 758 clang::DeclContext *defn_decl_ctx = 759 GetCachedClangDeclContextForDIE(dwarf->GetDIE(type_sp->GetID())); 760 if (defn_decl_ctx) 761 LinkDeclContextToDIE(defn_decl_ctx, die); 762 return type_sp; 763 } 764 } 765 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 766 DW_TAG_value_to_name(tag), type_name_cstr); 767 768 CompilerType enumerator_clang_type; 769 CompilerType clang_type; 770 clang_type.SetCompilerType( 771 &m_ast, dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE())); 772 if (!clang_type) { 773 if (attrs.type.IsValid()) { 774 Type *enumerator_type = 775 dwarf->ResolveTypeUID(attrs.type.Reference(), true); 776 if (enumerator_type) 777 enumerator_clang_type = enumerator_type->GetFullCompilerType(); 778 } 779 780 if (!enumerator_clang_type) { 781 if (attrs.byte_size) { 782 enumerator_clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize( 783 "", DW_ATE_signed, *attrs.byte_size * 8); 784 } else { 785 enumerator_clang_type = m_ast.GetBasicType(eBasicTypeInt); 786 } 787 } 788 789 clang_type = m_ast.CreateEnumerationType( 790 attrs.name.GetCString(), GetClangDeclContextContainingDIE(die, nullptr), 791 attrs.decl, enumerator_clang_type, attrs.is_scoped_enum); 792 } else { 793 enumerator_clang_type = m_ast.GetEnumerationIntegerType(clang_type); 794 } 795 796 LinkDeclContextToDIE(TypeSystemClang::GetDeclContextForType(clang_type), die); 797 798 type_sp = std::make_shared<Type>( 799 die.GetID(), dwarf, attrs.name, attrs.byte_size, nullptr, 800 dwarf->GetUID(attrs.type.Reference()), Type::eEncodingIsUID, &attrs.decl, 801 clang_type, Type::ResolveState::Forward); 802 803 if (TypeSystemClang::StartTagDeclarationDefinition(clang_type)) { 804 if (die.HasChildren()) { 805 bool is_signed = false; 806 enumerator_clang_type.IsIntegerType(is_signed); 807 ParseChildEnumerators(clang_type, is_signed, 808 type_sp->GetByteSize().getValueOr(0), die); 809 } 810 TypeSystemClang::CompleteTagDeclarationDefinition(clang_type); 811 } else { 812 dwarf->GetObjectFile()->GetModule()->ReportError( 813 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 814 "definition.\nPlease file a bug and attach the file at the " 815 "start of this error message", 816 die.GetOffset(), attrs.name.GetCString()); 817 } 818 return type_sp; 819 } 820 821 TypeSP DWARFASTParserClang::ParseSubroutine(const DWARFDIE &die, 822 ParsedDWARFTypeAttributes &attrs) { 823 Log *log(LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION | 824 DWARF_LOG_LOOKUPS)); 825 826 SymbolFileDWARF *dwarf = die.GetDWARF(); 827 const dw_tag_t tag = die.Tag(); 828 829 bool is_variadic = false; 830 bool is_static = false; 831 bool has_template_params = false; 832 833 unsigned type_quals = 0; 834 835 std::string object_pointer_name; 836 if (attrs.object_pointer) { 837 const char *object_pointer_name_cstr = attrs.object_pointer.GetName(); 838 if (object_pointer_name_cstr) 839 object_pointer_name = object_pointer_name_cstr; 840 } 841 842 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 843 DW_TAG_value_to_name(tag), type_name_cstr); 844 845 CompilerType return_clang_type; 846 Type *func_type = NULL; 847 848 if (attrs.type.IsValid()) 849 func_type = dwarf->ResolveTypeUID(attrs.type.Reference(), true); 850 851 if (func_type) 852 return_clang_type = func_type->GetForwardCompilerType(); 853 else 854 return_clang_type = m_ast.GetBasicType(eBasicTypeVoid); 855 856 std::vector<CompilerType> function_param_types; 857 std::vector<clang::ParmVarDecl *> function_param_decls; 858 859 // Parse the function children for the parameters 860 861 DWARFDIE decl_ctx_die; 862 clang::DeclContext *containing_decl_ctx = 863 GetClangDeclContextContainingDIE(die, &decl_ctx_die); 864 const clang::Decl::Kind containing_decl_kind = 865 containing_decl_ctx->getDeclKind(); 866 867 bool is_cxx_method = DeclKindIsCXXClass(containing_decl_kind); 868 // Start off static. This will be set to false in 869 // ParseChildParameters(...) if we find a "this" parameters as the 870 // first parameter 871 if (is_cxx_method) { 872 is_static = true; 873 } 874 875 if (die.HasChildren()) { 876 bool skip_artificial = true; 877 ParseChildParameters(containing_decl_ctx, die, skip_artificial, is_static, 878 is_variadic, has_template_params, 879 function_param_types, function_param_decls, 880 type_quals); 881 } 882 883 bool ignore_containing_context = false; 884 // Check for templatized class member functions. If we had any 885 // DW_TAG_template_type_parameter or DW_TAG_template_value_parameter 886 // the DW_TAG_subprogram DIE, then we can't let this become a method in 887 // a class. Why? Because templatized functions are only emitted if one 888 // of the templatized methods is used in the current compile unit and 889 // we will end up with classes that may or may not include these member 890 // functions and this means one class won't match another class 891 // definition and it affects our ability to use a class in the clang 892 // expression parser. So for the greater good, we currently must not 893 // allow any template member functions in a class definition. 894 if (is_cxx_method && has_template_params) { 895 ignore_containing_context = true; 896 is_cxx_method = false; 897 } 898 899 // clang_type will get the function prototype clang type after this 900 // call 901 CompilerType clang_type = m_ast.CreateFunctionType( 902 return_clang_type, function_param_types.data(), 903 function_param_types.size(), is_variadic, type_quals); 904 905 if (attrs.name) { 906 bool type_handled = false; 907 if (tag == DW_TAG_subprogram || tag == DW_TAG_inlined_subroutine) { 908 ObjCLanguage::MethodName objc_method(attrs.name.GetStringRef(), true); 909 if (objc_method.IsValid(true)) { 910 CompilerType class_opaque_type; 911 ConstString class_name(objc_method.GetClassName()); 912 if (class_name) { 913 TypeSP complete_objc_class_type_sp( 914 dwarf->FindCompleteObjCDefinitionTypeForDIE(DWARFDIE(), 915 class_name, false)); 916 917 if (complete_objc_class_type_sp) { 918 CompilerType type_clang_forward_type = 919 complete_objc_class_type_sp->GetForwardCompilerType(); 920 if (TypeSystemClang::IsObjCObjectOrInterfaceType( 921 type_clang_forward_type)) 922 class_opaque_type = type_clang_forward_type; 923 } 924 } 925 926 if (class_opaque_type) { 927 // If accessibility isn't set to anything valid, assume public 928 // for now... 929 if (attrs.accessibility == eAccessNone) 930 attrs.accessibility = eAccessPublic; 931 932 clang::ObjCMethodDecl *objc_method_decl = 933 m_ast.AddMethodToObjCObjectType( 934 class_opaque_type, attrs.name.GetCString(), clang_type, 935 attrs.accessibility, attrs.is_artificial, is_variadic, 936 attrs.is_objc_direct_call); 937 type_handled = objc_method_decl != NULL; 938 if (type_handled) { 939 LinkDeclContextToDIE(objc_method_decl, die); 940 m_ast.SetMetadataAsUserID(objc_method_decl, die.GetID()); 941 } else { 942 dwarf->GetObjectFile()->GetModule()->ReportError( 943 "{0x%8.8x}: invalid Objective-C method 0x%4.4x (%s), " 944 "please file a bug and attach the file at the start of " 945 "this error message", 946 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 947 } 948 } 949 } else if (is_cxx_method) { 950 // Look at the parent of this DIE and see if is is a class or 951 // struct and see if this is actually a C++ method 952 Type *class_type = dwarf->ResolveType(decl_ctx_die); 953 if (class_type) { 954 bool alternate_defn = false; 955 if (class_type->GetID() != decl_ctx_die.GetID() || 956 IsClangModuleFwdDecl(decl_ctx_die)) { 957 alternate_defn = true; 958 959 // We uniqued the parent class of this function to another 960 // class so we now need to associate all dies under 961 // "decl_ctx_die" to DIEs in the DIE for "class_type"... 962 DWARFDIE class_type_die = dwarf->GetDIE(class_type->GetID()); 963 964 if (class_type_die) { 965 std::vector<DWARFDIE> failures; 966 967 CopyUniqueClassMethodTypes(decl_ctx_die, class_type_die, 968 class_type, failures); 969 970 // FIXME do something with these failures that's 971 // smarter than just dropping them on the ground. 972 // Unfortunately classes don't like having stuff added 973 // to them after their definitions are complete... 974 975 Type *type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 976 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 977 return type_ptr->shared_from_this(); 978 } 979 } 980 } 981 982 if (attrs.specification.IsValid()) { 983 // We have a specification which we are going to base our 984 // function prototype off of, so we need this type to be 985 // completed so that the m_die_to_decl_ctx for the method in 986 // the specification has a valid clang decl context. 987 class_type->GetForwardCompilerType(); 988 // If we have a specification, then the function type should 989 // have been made with the specification and not with this 990 // die. 991 DWARFDIE spec_die = attrs.specification.Reference(); 992 clang::DeclContext *spec_clang_decl_ctx = 993 GetClangDeclContextForDIE(spec_die); 994 if (spec_clang_decl_ctx) { 995 LinkDeclContextToDIE(spec_clang_decl_ctx, die); 996 } else { 997 dwarf->GetObjectFile()->GetModule()->ReportWarning( 998 "0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8x" 999 ") has no decl\n", 1000 die.GetID(), spec_die.GetOffset()); 1001 } 1002 type_handled = true; 1003 } else if (attrs.abstract_origin.IsValid()) { 1004 // We have a specification which we are going to base our 1005 // function prototype off of, so we need this type to be 1006 // completed so that the m_die_to_decl_ctx for the method in 1007 // the abstract origin has a valid clang decl context. 1008 class_type->GetForwardCompilerType(); 1009 1010 DWARFDIE abs_die = attrs.abstract_origin.Reference(); 1011 clang::DeclContext *abs_clang_decl_ctx = 1012 GetClangDeclContextForDIE(abs_die); 1013 if (abs_clang_decl_ctx) { 1014 LinkDeclContextToDIE(abs_clang_decl_ctx, die); 1015 } else { 1016 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1017 "0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8x" 1018 ") has no decl\n", 1019 die.GetID(), abs_die.GetOffset()); 1020 } 1021 type_handled = true; 1022 } else { 1023 CompilerType class_opaque_type = 1024 class_type->GetForwardCompilerType(); 1025 if (TypeSystemClang::IsCXXClassType(class_opaque_type)) { 1026 if (class_opaque_type.IsBeingDefined() || alternate_defn) { 1027 if (!is_static && !die.HasChildren()) { 1028 // We have a C++ member function with no children (this 1029 // pointer!) and clang will get mad if we try and make 1030 // a function that isn't well formed in the DWARF, so 1031 // we will just skip it... 1032 type_handled = true; 1033 } else { 1034 bool add_method = true; 1035 if (alternate_defn) { 1036 // If an alternate definition for the class exists, 1037 // then add the method only if an equivalent is not 1038 // already present. 1039 clang::CXXRecordDecl *record_decl = 1040 m_ast.GetAsCXXRecordDecl( 1041 class_opaque_type.GetOpaqueQualType()); 1042 if (record_decl) { 1043 for (auto method_iter = record_decl->method_begin(); 1044 method_iter != record_decl->method_end(); 1045 method_iter++) { 1046 clang::CXXMethodDecl *method_decl = *method_iter; 1047 if (method_decl->getNameInfo().getAsString() == 1048 attrs.name.GetStringRef()) { 1049 if (method_decl->getType() == 1050 ClangUtil::GetQualType(clang_type)) { 1051 add_method = false; 1052 LinkDeclContextToDIE(method_decl, die); 1053 type_handled = true; 1054 1055 break; 1056 } 1057 } 1058 } 1059 } 1060 } 1061 1062 if (add_method) { 1063 llvm::PrettyStackTraceFormat stack_trace( 1064 "SymbolFileDWARF::ParseType() is adding a method " 1065 "%s to class %s in DIE 0x%8.8" PRIx64 " from %s", 1066 attrs.name.GetCString(), 1067 class_type->GetName().GetCString(), die.GetID(), 1068 dwarf->GetObjectFile() 1069 ->GetFileSpec() 1070 .GetPath() 1071 .c_str()); 1072 1073 const bool is_attr_used = false; 1074 // Neither GCC 4.2 nor clang++ currently set a valid 1075 // accessibility in the DWARF for C++ methods... 1076 // Default to public for now... 1077 if (attrs.accessibility == eAccessNone) 1078 attrs.accessibility = eAccessPublic; 1079 1080 clang::CXXMethodDecl *cxx_method_decl = 1081 m_ast.AddMethodToCXXRecordType( 1082 class_opaque_type.GetOpaqueQualType(), 1083 attrs.name.GetCString(), attrs.mangled_name, 1084 clang_type, attrs.accessibility, attrs.is_virtual, 1085 is_static, attrs.is_inline, attrs.is_explicit, 1086 is_attr_used, attrs.is_artificial); 1087 1088 type_handled = cxx_method_decl != NULL; 1089 // Artificial methods are always handled even when we 1090 // don't create a new declaration for them. 1091 type_handled |= attrs.is_artificial; 1092 1093 if (cxx_method_decl) { 1094 LinkDeclContextToDIE(cxx_method_decl, die); 1095 1096 ClangASTMetadata metadata; 1097 metadata.SetUserID(die.GetID()); 1098 1099 if (!object_pointer_name.empty()) { 1100 metadata.SetObjectPtrName( 1101 object_pointer_name.c_str()); 1102 LLDB_LOGF(log, 1103 "Setting object pointer name: %s on method " 1104 "object %p.\n", 1105 object_pointer_name.c_str(), 1106 static_cast<void *>(cxx_method_decl)); 1107 } 1108 m_ast.SetMetadata(cxx_method_decl, metadata); 1109 } else { 1110 ignore_containing_context = true; 1111 } 1112 } 1113 } 1114 } else { 1115 // We were asked to parse the type for a method in a 1116 // class, yet the class hasn't been asked to complete 1117 // itself through the clang::ExternalASTSource protocol, 1118 // so we need to just have the class complete itself and 1119 // do things the right way, then our 1120 // DIE should then have an entry in the 1121 // dwarf->GetDIEToType() map. First 1122 // we need to modify the dwarf->GetDIEToType() so it 1123 // doesn't think we are trying to parse this DIE 1124 // anymore... 1125 dwarf->GetDIEToType()[die.GetDIE()] = NULL; 1126 1127 // Now we get the full type to force our class type to 1128 // complete itself using the clang::ExternalASTSource 1129 // protocol which will parse all base classes and all 1130 // methods (including the method for this DIE). 1131 class_type->GetFullCompilerType(); 1132 1133 // The type for this DIE should have been filled in the 1134 // function call above 1135 Type *type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1136 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1137 return type_ptr->shared_from_this(); 1138 } 1139 1140 // FIXME This is fixing some even uglier behavior but we 1141 // really need to 1142 // uniq the methods of each class as well as the class 1143 // itself. <rdar://problem/11240464> 1144 type_handled = true; 1145 } 1146 } 1147 } 1148 } 1149 } 1150 } 1151 1152 if (!type_handled) { 1153 clang::FunctionDecl *function_decl = nullptr; 1154 clang::FunctionDecl *template_function_decl = nullptr; 1155 1156 if (attrs.abstract_origin.IsValid()) { 1157 DWARFDIE abs_die = attrs.abstract_origin.Reference(); 1158 1159 if (dwarf->ResolveType(abs_die)) { 1160 function_decl = llvm::dyn_cast_or_null<clang::FunctionDecl>( 1161 GetCachedClangDeclContextForDIE(abs_die)); 1162 1163 if (function_decl) { 1164 LinkDeclContextToDIE(function_decl, die); 1165 } 1166 } 1167 } 1168 1169 if (!function_decl) { 1170 // We just have a function that isn't part of a class 1171 function_decl = m_ast.CreateFunctionDeclaration( 1172 ignore_containing_context ? m_ast.GetTranslationUnitDecl() 1173 : containing_decl_ctx, 1174 attrs.name.GetCString(), clang_type, attrs.storage, 1175 attrs.is_inline); 1176 1177 if (has_template_params) { 1178 TypeSystemClang::TemplateParameterInfos template_param_infos; 1179 ParseTemplateParameterInfos(die, template_param_infos); 1180 template_function_decl = m_ast.CreateFunctionDeclaration( 1181 ignore_containing_context ? m_ast.GetTranslationUnitDecl() 1182 : containing_decl_ctx, 1183 attrs.name.GetCString(), clang_type, attrs.storage, 1184 attrs.is_inline); 1185 clang::FunctionTemplateDecl *func_template_decl = 1186 m_ast.CreateFunctionTemplateDecl( 1187 containing_decl_ctx, template_function_decl, 1188 attrs.name.GetCString(), template_param_infos); 1189 m_ast.CreateFunctionTemplateSpecializationInfo( 1190 function_decl, func_template_decl, template_param_infos); 1191 } 1192 1193 lldbassert(function_decl); 1194 1195 if (function_decl) { 1196 LinkDeclContextToDIE(function_decl, die); 1197 1198 if (!function_param_decls.empty()) { 1199 m_ast.SetFunctionParameters(function_decl, 1200 &function_param_decls.front(), 1201 function_param_decls.size()); 1202 if (template_function_decl) 1203 m_ast.SetFunctionParameters(template_function_decl, 1204 &function_param_decls.front(), 1205 function_param_decls.size()); 1206 } 1207 1208 ClangASTMetadata metadata; 1209 metadata.SetUserID(die.GetID()); 1210 1211 if (!object_pointer_name.empty()) { 1212 metadata.SetObjectPtrName(object_pointer_name.c_str()); 1213 LLDB_LOGF(log, 1214 "Setting object pointer name: %s on function " 1215 "object %p.", 1216 object_pointer_name.c_str(), 1217 static_cast<void *>(function_decl)); 1218 } 1219 m_ast.SetMetadata(function_decl, metadata); 1220 } 1221 } 1222 } 1223 } 1224 return std::make_shared<Type>( 1225 die.GetID(), dwarf, attrs.name, llvm::None, nullptr, LLDB_INVALID_UID, 1226 Type::eEncodingIsUID, &attrs.decl, clang_type, Type::ResolveState::Full); 1227 } 1228 1229 TypeSP DWARFASTParserClang::ParseArrayType(const DWARFDIE &die, 1230 ParsedDWARFTypeAttributes &attrs) { 1231 SymbolFileDWARF *dwarf = die.GetDWARF(); 1232 1233 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1234 DW_TAG_value_to_name(tag), type_name_cstr); 1235 1236 DWARFDIE type_die = attrs.type.Reference(); 1237 Type *element_type = dwarf->ResolveTypeUID(type_die, true); 1238 1239 if (!element_type) 1240 return nullptr; 1241 1242 llvm::Optional<SymbolFile::ArrayInfo> array_info = ParseChildArrayInfo(die); 1243 if (array_info) { 1244 attrs.byte_stride = array_info->byte_stride; 1245 attrs.bit_stride = array_info->bit_stride; 1246 } 1247 if (attrs.byte_stride == 0 && attrs.bit_stride == 0) 1248 attrs.byte_stride = element_type->GetByteSize().getValueOr(0); 1249 CompilerType array_element_type = element_type->GetForwardCompilerType(); 1250 1251 if (TypeSystemClang::IsCXXClassType(array_element_type) && 1252 !array_element_type.GetCompleteType()) { 1253 ModuleSP module_sp = die.GetModule(); 1254 if (module_sp) { 1255 if (die.GetCU()->GetProducer() == eProducerClang) 1256 module_sp->ReportError( 1257 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a " 1258 "class/union/struct element type DIE 0x%8.8x that is a " 1259 "forward declaration, not a complete definition.\nTry " 1260 "compiling the source file with -fstandalone-debug or " 1261 "disable -gmodules", 1262 die.GetOffset(), type_die.GetOffset()); 1263 else 1264 module_sp->ReportError( 1265 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a " 1266 "class/union/struct element type DIE 0x%8.8x that is a " 1267 "forward declaration, not a complete definition.\nPlease " 1268 "file a bug against the compiler and include the " 1269 "preprocessed output for %s", 1270 die.GetOffset(), type_die.GetOffset(), GetUnitName(die).c_str()); 1271 } 1272 1273 // We have no choice other than to pretend that the element class 1274 // type is complete. If we don't do this, clang will crash when 1275 // trying to layout the class. Since we provide layout 1276 // assistance, all ivars in this class and other classes will be 1277 // fine, this is the best we can do short of crashing. 1278 if (TypeSystemClang::StartTagDeclarationDefinition(array_element_type)) { 1279 TypeSystemClang::CompleteTagDeclarationDefinition(array_element_type); 1280 } else { 1281 module_sp->ReportError("DWARF DIE at 0x%8.8x was not able to " 1282 "start its definition.\nPlease file a " 1283 "bug and attach the file at the start " 1284 "of this error message", 1285 type_die.GetOffset()); 1286 } 1287 } 1288 1289 uint64_t array_element_bit_stride = 1290 attrs.byte_stride * 8 + attrs.bit_stride; 1291 CompilerType clang_type; 1292 if (array_info && array_info->element_orders.size() > 0) { 1293 uint64_t num_elements = 0; 1294 auto end = array_info->element_orders.rend(); 1295 for (auto pos = array_info->element_orders.rbegin(); pos != end; ++pos) { 1296 num_elements = *pos; 1297 clang_type = m_ast.CreateArrayType(array_element_type, num_elements, 1298 attrs.is_vector); 1299 array_element_type = clang_type; 1300 array_element_bit_stride = num_elements 1301 ? array_element_bit_stride * num_elements 1302 : array_element_bit_stride; 1303 } 1304 } else { 1305 clang_type = 1306 m_ast.CreateArrayType(array_element_type, 0, attrs.is_vector); 1307 } 1308 ConstString empty_name; 1309 TypeSP type_sp = std::make_shared<Type>( 1310 die.GetID(), dwarf, empty_name, array_element_bit_stride / 8, nullptr, 1311 dwarf->GetUID(type_die), Type::eEncodingIsUID, &attrs.decl, clang_type, 1312 Type::ResolveState::Full); 1313 type_sp->SetEncodingType(element_type); 1314 const clang::Type *type = ClangUtil::GetQualType(clang_type).getTypePtr(); 1315 m_ast.SetMetadataAsUserID(type, die.GetID()); 1316 return type_sp; 1317 } 1318 1319 TypeSP DWARFASTParserClang::ParsePointerToMemberType( 1320 const DWARFDIE &die, const ParsedDWARFTypeAttributes &attrs) { 1321 SymbolFileDWARF *dwarf = die.GetDWARF(); 1322 Type *pointee_type = dwarf->ResolveTypeUID(attrs.type.Reference(), true); 1323 Type *class_type = 1324 dwarf->ResolveTypeUID(attrs.containing_type.Reference(), true); 1325 1326 CompilerType pointee_clang_type = pointee_type->GetForwardCompilerType(); 1327 CompilerType class_clang_type = class_type->GetLayoutCompilerType(); 1328 1329 CompilerType clang_type = TypeSystemClang::CreateMemberPointerType( 1330 class_clang_type, pointee_clang_type); 1331 1332 if (llvm::Optional<uint64_t> clang_type_size = 1333 clang_type.GetByteSize(nullptr)) { 1334 return std::make_shared<Type>(die.GetID(), dwarf, attrs.name, 1335 *clang_type_size, nullptr, LLDB_INVALID_UID, 1336 Type::eEncodingIsUID, nullptr, clang_type, 1337 Type::ResolveState::Forward); 1338 } 1339 return nullptr; 1340 } 1341 1342 TypeSP DWARFASTParserClang::UpdateSymbolContextScopeForType( 1343 const SymbolContext &sc, const DWARFDIE &die, TypeSP type_sp) { 1344 if (!type_sp) 1345 return type_sp; 1346 1347 SymbolFileDWARF *dwarf = die.GetDWARF(); 1348 TypeList &type_list = dwarf->GetTypeList(); 1349 DWARFDIE sc_parent_die = SymbolFileDWARF::GetParentSymbolContextDIE(die); 1350 dw_tag_t sc_parent_tag = sc_parent_die.Tag(); 1351 1352 SymbolContextScope *symbol_context_scope = nullptr; 1353 if (sc_parent_tag == DW_TAG_compile_unit || 1354 sc_parent_tag == DW_TAG_partial_unit) { 1355 symbol_context_scope = sc.comp_unit; 1356 } else if (sc.function != nullptr && sc_parent_die) { 1357 symbol_context_scope = 1358 sc.function->GetBlock(true).FindBlockByID(sc_parent_die.GetID()); 1359 if (symbol_context_scope == nullptr) 1360 symbol_context_scope = sc.function; 1361 } else { 1362 symbol_context_scope = sc.module_sp.get(); 1363 } 1364 1365 if (symbol_context_scope != nullptr) 1366 type_sp->SetSymbolContextScope(symbol_context_scope); 1367 1368 // We are ready to put this type into the uniqued list up at the module 1369 // level. 1370 type_list.Insert(type_sp); 1371 1372 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1373 return type_sp; 1374 } 1375 1376 TypeSP 1377 DWARFASTParserClang::ParseStructureLikeDIE(const SymbolContext &sc, 1378 const DWARFDIE &die, 1379 ParsedDWARFTypeAttributes &attrs) { 1380 TypeSP type_sp; 1381 CompilerType clang_type; 1382 const dw_tag_t tag = die.Tag(); 1383 SymbolFileDWARF *dwarf = die.GetDWARF(); 1384 LanguageType cu_language = SymbolFileDWARF::GetLanguage(*die.GetCU()); 1385 Log *log = LogChannelDWARF::GetLogIfAll(DWARF_LOG_TYPE_COMPLETION | 1386 DWARF_LOG_LOOKUPS); 1387 1388 // UniqueDWARFASTType is large, so don't create a local variables on the 1389 // stack, put it on the heap. This function is often called recursively and 1390 // clang isn't good at sharing the stack space for variables in different 1391 // blocks. 1392 auto unique_ast_entry_up = std::make_unique<UniqueDWARFASTType>(); 1393 1394 ConstString unique_typename(attrs.name); 1395 Declaration unique_decl(attrs.decl); 1396 1397 if (attrs.name) { 1398 if (Language::LanguageIsCPlusPlus(cu_language)) { 1399 // For C++, we rely solely upon the one definition rule that says 1400 // only one thing can exist at a given decl context. We ignore the 1401 // file and line that things are declared on. 1402 std::string qualified_name; 1403 if (die.GetQualifiedName(qualified_name)) 1404 unique_typename = ConstString(qualified_name); 1405 unique_decl.Clear(); 1406 } 1407 1408 if (dwarf->GetUniqueDWARFASTTypeMap().Find( 1409 unique_typename, die, unique_decl, attrs.byte_size.getValueOr(-1), 1410 *unique_ast_entry_up)) { 1411 type_sp = unique_ast_entry_up->m_type_sp; 1412 if (type_sp) { 1413 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1414 LinkDeclContextToDIE( 1415 GetCachedClangDeclContextForDIE(unique_ast_entry_up->m_die), die); 1416 return type_sp; 1417 } 1418 } 1419 } 1420 1421 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1422 DW_TAG_value_to_name(tag), type_name_cstr); 1423 1424 int tag_decl_kind = -1; 1425 AccessType default_accessibility = eAccessNone; 1426 if (tag == DW_TAG_structure_type) { 1427 tag_decl_kind = clang::TTK_Struct; 1428 default_accessibility = eAccessPublic; 1429 } else if (tag == DW_TAG_union_type) { 1430 tag_decl_kind = clang::TTK_Union; 1431 default_accessibility = eAccessPublic; 1432 } else if (tag == DW_TAG_class_type) { 1433 tag_decl_kind = clang::TTK_Class; 1434 default_accessibility = eAccessPrivate; 1435 } 1436 1437 if (attrs.byte_size && *attrs.byte_size == 0 && attrs.name && 1438 !die.HasChildren() && cu_language == eLanguageTypeObjC) { 1439 // Work around an issue with clang at the moment where forward 1440 // declarations for objective C classes are emitted as: 1441 // DW_TAG_structure_type [2] 1442 // DW_AT_name( "ForwardObjcClass" ) 1443 // DW_AT_byte_size( 0x00 ) 1444 // DW_AT_decl_file( "..." ) 1445 // DW_AT_decl_line( 1 ) 1446 // 1447 // Note that there is no DW_AT_declaration and there are no children, 1448 // and the byte size is zero. 1449 attrs.is_forward_declaration = true; 1450 } 1451 1452 if (attrs.class_language == eLanguageTypeObjC || 1453 attrs.class_language == eLanguageTypeObjC_plus_plus) { 1454 if (!attrs.is_complete_objc_class && 1455 die.Supports_DW_AT_APPLE_objc_complete_type()) { 1456 // We have a valid eSymbolTypeObjCClass class symbol whose name 1457 // matches the current objective C class that we are trying to find 1458 // and this DIE isn't the complete definition (we checked 1459 // is_complete_objc_class above and know it is false), so the real 1460 // definition is in here somewhere 1461 type_sp = 1462 dwarf->FindCompleteObjCDefinitionTypeForDIE(die, attrs.name, true); 1463 1464 if (!type_sp) { 1465 SymbolFileDWARFDebugMap *debug_map_symfile = 1466 dwarf->GetDebugMapSymfile(); 1467 if (debug_map_symfile) { 1468 // We weren't able to find a full declaration in this DWARF, 1469 // see if we have a declaration anywhere else... 1470 type_sp = debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE( 1471 die, attrs.name, true); 1472 } 1473 } 1474 1475 if (type_sp) { 1476 if (log) { 1477 dwarf->GetObjectFile()->GetModule()->LogMessage( 1478 log, 1479 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is an " 1480 "incomplete objc type, complete type is 0x%8.8" PRIx64, 1481 static_cast<void *>(this), die.GetOffset(), 1482 DW_TAG_value_to_name(tag), attrs.name.GetCString(), 1483 type_sp->GetID()); 1484 } 1485 1486 // We found a real definition for this type elsewhere so lets use 1487 // it and cache the fact that we found a complete type for this 1488 // die 1489 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1490 return type_sp; 1491 } 1492 } 1493 } 1494 1495 if (attrs.is_forward_declaration) { 1496 // We have a forward declaration to a type and we need to try and 1497 // find a full declaration. We look in the current type index just in 1498 // case we have a forward declaration followed by an actual 1499 // declarations in the DWARF. If this fails, we need to look 1500 // elsewhere... 1501 if (log) { 1502 dwarf->GetObjectFile()->GetModule()->LogMessage( 1503 log, 1504 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 1505 "forward declaration, trying to find complete type", 1506 static_cast<void *>(this), die.GetOffset(), DW_TAG_value_to_name(tag), 1507 attrs.name.GetCString()); 1508 } 1509 1510 // See if the type comes from a Clang module and if so, track down 1511 // that type. 1512 type_sp = ParseTypeFromClangModule(sc, die, log); 1513 if (type_sp) 1514 return type_sp; 1515 1516 DWARFDeclContext die_decl_ctx = SymbolFileDWARF::GetDWARFDeclContext(die); 1517 1518 // type_sp = FindDefinitionTypeForDIE (dwarf_cu, die, 1519 // type_name_const_str); 1520 type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx); 1521 1522 if (!type_sp) { 1523 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 1524 if (debug_map_symfile) { 1525 // We weren't able to find a full declaration in this DWARF, see 1526 // if we have a declaration anywhere else... 1527 type_sp = debug_map_symfile->FindDefinitionTypeForDWARFDeclContext( 1528 die_decl_ctx); 1529 } 1530 } 1531 1532 if (type_sp) { 1533 if (log) { 1534 dwarf->GetObjectFile()->GetModule()->LogMessage( 1535 log, 1536 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 1537 "forward declaration, complete type is 0x%8.8" PRIx64, 1538 static_cast<void *>(this), die.GetOffset(), 1539 DW_TAG_value_to_name(tag), attrs.name.GetCString(), 1540 type_sp->GetID()); 1541 } 1542 1543 // We found a real definition for this type elsewhere so lets use 1544 // it and cache the fact that we found a complete type for this die 1545 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1546 clang::DeclContext *defn_decl_ctx = 1547 GetCachedClangDeclContextForDIE(dwarf->GetDIE(type_sp->GetID())); 1548 if (defn_decl_ctx) 1549 LinkDeclContextToDIE(defn_decl_ctx, die); 1550 return type_sp; 1551 } 1552 } 1553 assert(tag_decl_kind != -1); 1554 bool clang_type_was_created = false; 1555 clang_type.SetCompilerType( 1556 &m_ast, dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE())); 1557 if (!clang_type) { 1558 clang::DeclContext *decl_ctx = 1559 GetClangDeclContextContainingDIE(die, nullptr); 1560 1561 // If your decl context is a record that was imported from another 1562 // AST context (in the gmodules case), we need to make sure the type 1563 // backing the Decl is complete before adding children to it. This is 1564 // not an issue in the non-gmodules case because the debug info will 1565 // always contain a full definition of parent types in that case. 1566 CompleteExternalTagDeclType(m_ast, GetClangASTImporter(), decl_ctx, die, 1567 attrs.name.GetCString()); 1568 1569 if (attrs.accessibility == eAccessNone && decl_ctx) { 1570 // Check the decl context that contains this class/struct/union. If 1571 // it is a class we must give it an accessibility. 1572 const clang::Decl::Kind containing_decl_kind = decl_ctx->getDeclKind(); 1573 if (DeclKindIsCXXClass(containing_decl_kind)) 1574 attrs.accessibility = default_accessibility; 1575 } 1576 1577 ClangASTMetadata metadata; 1578 metadata.SetUserID(die.GetID()); 1579 metadata.SetIsDynamicCXXType(dwarf->ClassOrStructIsVirtual(die)); 1580 1581 if (attrs.name.GetStringRef().contains('<')) { 1582 TypeSystemClang::TemplateParameterInfos template_param_infos; 1583 if (ParseTemplateParameterInfos(die, template_param_infos)) { 1584 clang::ClassTemplateDecl *class_template_decl = 1585 m_ast.ParseClassTemplateDecl(decl_ctx, attrs.accessibility, 1586 attrs.name.GetCString(), tag_decl_kind, 1587 template_param_infos); 1588 if (!class_template_decl) { 1589 if (log) { 1590 dwarf->GetObjectFile()->GetModule()->LogMessage( 1591 log, 1592 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" " 1593 "clang::ClassTemplateDecl failed to return a decl.", 1594 static_cast<void *>(this), die.GetOffset(), 1595 DW_TAG_value_to_name(tag), attrs.name.GetCString()); 1596 } 1597 return TypeSP(); 1598 } 1599 1600 clang::ClassTemplateSpecializationDecl *class_specialization_decl = 1601 m_ast.CreateClassTemplateSpecializationDecl( 1602 decl_ctx, class_template_decl, tag_decl_kind, 1603 template_param_infos); 1604 clang_type = m_ast.CreateClassTemplateSpecializationType( 1605 class_specialization_decl); 1606 clang_type_was_created = true; 1607 1608 m_ast.SetMetadata(class_template_decl, metadata); 1609 m_ast.SetMetadata(class_specialization_decl, metadata); 1610 } 1611 } 1612 1613 if (!clang_type_was_created) { 1614 clang_type_was_created = true; 1615 clang_type = m_ast.CreateRecordType( 1616 decl_ctx, attrs.accessibility, attrs.name.GetCString(), tag_decl_kind, 1617 attrs.class_language, &metadata, attrs.exports_symbols); 1618 } 1619 } 1620 1621 // Store a forward declaration to this class type in case any 1622 // parameters in any class methods need it for the clang types for 1623 // function prototypes. 1624 LinkDeclContextToDIE(m_ast.GetDeclContextForType(clang_type), die); 1625 type_sp = std::make_shared<Type>(die.GetID(), dwarf, attrs.name, 1626 attrs.byte_size, nullptr, LLDB_INVALID_UID, 1627 Type::eEncodingIsUID, &attrs.decl, 1628 clang_type, Type::ResolveState::Forward); 1629 1630 type_sp->SetIsCompleteObjCClass(attrs.is_complete_objc_class); 1631 1632 // Add our type to the unique type map so we don't end up creating many 1633 // copies of the same type over and over in the ASTContext for our 1634 // module 1635 unique_ast_entry_up->m_type_sp = type_sp; 1636 unique_ast_entry_up->m_die = die; 1637 unique_ast_entry_up->m_declaration = unique_decl; 1638 unique_ast_entry_up->m_byte_size = attrs.byte_size.getValueOr(0); 1639 dwarf->GetUniqueDWARFASTTypeMap().Insert(unique_typename, 1640 *unique_ast_entry_up); 1641 1642 if (attrs.is_forward_declaration && die.HasChildren()) { 1643 // Check to see if the DIE actually has a definition, some version of 1644 // GCC will 1645 // emit DIEs with DW_AT_declaration set to true, but yet still have 1646 // subprogram, members, or inheritance, so we can't trust it 1647 DWARFDIE child_die = die.GetFirstChild(); 1648 while (child_die) { 1649 switch (child_die.Tag()) { 1650 case DW_TAG_inheritance: 1651 case DW_TAG_subprogram: 1652 case DW_TAG_member: 1653 case DW_TAG_APPLE_property: 1654 case DW_TAG_class_type: 1655 case DW_TAG_structure_type: 1656 case DW_TAG_enumeration_type: 1657 case DW_TAG_typedef: 1658 case DW_TAG_union_type: 1659 child_die.Clear(); 1660 attrs.is_forward_declaration = false; 1661 break; 1662 default: 1663 child_die = child_die.GetSibling(); 1664 break; 1665 } 1666 } 1667 } 1668 1669 if (!attrs.is_forward_declaration) { 1670 // Always start the definition for a class type so that if the class 1671 // has child classes or types that require the class to be created 1672 // for use as their decl contexts the class will be ready to accept 1673 // these child definitions. 1674 if (!die.HasChildren()) { 1675 // No children for this struct/union/class, lets finish it 1676 if (TypeSystemClang::StartTagDeclarationDefinition(clang_type)) { 1677 TypeSystemClang::CompleteTagDeclarationDefinition(clang_type); 1678 } else { 1679 dwarf->GetObjectFile()->GetModule()->ReportError( 1680 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 1681 "definition.\nPlease file a bug and attach the file at the " 1682 "start of this error message", 1683 die.GetOffset(), attrs.name.GetCString()); 1684 } 1685 1686 if (tag == DW_TAG_structure_type) // this only applies in C 1687 { 1688 clang::RecordDecl *record_decl = 1689 TypeSystemClang::GetAsRecordDecl(clang_type); 1690 1691 if (record_decl) { 1692 GetClangASTImporter().SetRecordLayout( 1693 record_decl, ClangASTImporter::LayoutInfo()); 1694 } 1695 } 1696 } else if (clang_type_was_created) { 1697 // Start the definition if the class is not objective C since the 1698 // underlying decls respond to isCompleteDefinition(). Objective 1699 // C decls don't respond to isCompleteDefinition() so we can't 1700 // start the declaration definition right away. For C++ 1701 // class/union/structs we want to start the definition in case the 1702 // class is needed as the declaration context for a contained class 1703 // or type without the need to complete that type.. 1704 1705 if (attrs.class_language != eLanguageTypeObjC && 1706 attrs.class_language != eLanguageTypeObjC_plus_plus) 1707 TypeSystemClang::StartTagDeclarationDefinition(clang_type); 1708 1709 // Leave this as a forward declaration until we need to know the 1710 // details of the type. lldb_private::Type will automatically call 1711 // the SymbolFile virtual function 1712 // "SymbolFileDWARF::CompleteType(Type *)" When the definition 1713 // needs to be defined. 1714 assert(!dwarf->GetForwardDeclClangTypeToDie().count( 1715 ClangUtil::RemoveFastQualifiers(clang_type) 1716 .GetOpaqueQualType()) && 1717 "Type already in the forward declaration map!"); 1718 // Can't assume m_ast.GetSymbolFile() is actually a 1719 // SymbolFileDWARF, it can be a SymbolFileDWARFDebugMap for Apple 1720 // binaries. 1721 dwarf->GetForwardDeclDieToClangType()[die.GetDIE()] = 1722 clang_type.GetOpaqueQualType(); 1723 dwarf->GetForwardDeclClangTypeToDie().try_emplace( 1724 ClangUtil::RemoveFastQualifiers(clang_type).GetOpaqueQualType(), 1725 *die.GetDIERef()); 1726 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), true); 1727 } 1728 } 1729 1730 // If we made a clang type, set the trivial abi if applicable: We only 1731 // do this for pass by value - which implies the Trivial ABI. There 1732 // isn't a way to assert that something that would normally be pass by 1733 // value is pass by reference, so we ignore that attribute if set. 1734 if (attrs.calling_convention == llvm::dwarf::DW_CC_pass_by_value) { 1735 clang::CXXRecordDecl *record_decl = 1736 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 1737 if (record_decl && record_decl->getDefinition()) { 1738 record_decl->setHasTrivialSpecialMemberForCall(); 1739 } 1740 } 1741 1742 if (attrs.calling_convention == llvm::dwarf::DW_CC_pass_by_reference) { 1743 clang::CXXRecordDecl *record_decl = 1744 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 1745 if (record_decl) 1746 record_decl->setArgPassingRestrictions( 1747 clang::RecordDecl::APK_CannotPassInRegs); 1748 } 1749 return type_sp; 1750 } 1751 1752 // DWARF parsing functions 1753 1754 class DWARFASTParserClang::DelayedAddObjCClassProperty { 1755 public: 1756 DelayedAddObjCClassProperty( 1757 const CompilerType &class_opaque_type, const char *property_name, 1758 const CompilerType &property_opaque_type, // The property type is only 1759 // required if you don't have an 1760 // ivar decl 1761 clang::ObjCIvarDecl *ivar_decl, const char *property_setter_name, 1762 const char *property_getter_name, uint32_t property_attributes, 1763 const ClangASTMetadata *metadata) 1764 : m_class_opaque_type(class_opaque_type), m_property_name(property_name), 1765 m_property_opaque_type(property_opaque_type), m_ivar_decl(ivar_decl), 1766 m_property_setter_name(property_setter_name), 1767 m_property_getter_name(property_getter_name), 1768 m_property_attributes(property_attributes) { 1769 if (metadata != nullptr) { 1770 m_metadata_up.reset(new ClangASTMetadata()); 1771 *m_metadata_up = *metadata; 1772 } 1773 } 1774 1775 DelayedAddObjCClassProperty(const DelayedAddObjCClassProperty &rhs) { 1776 *this = rhs; 1777 } 1778 1779 DelayedAddObjCClassProperty & 1780 operator=(const DelayedAddObjCClassProperty &rhs) { 1781 m_class_opaque_type = rhs.m_class_opaque_type; 1782 m_property_name = rhs.m_property_name; 1783 m_property_opaque_type = rhs.m_property_opaque_type; 1784 m_ivar_decl = rhs.m_ivar_decl; 1785 m_property_setter_name = rhs.m_property_setter_name; 1786 m_property_getter_name = rhs.m_property_getter_name; 1787 m_property_attributes = rhs.m_property_attributes; 1788 1789 if (rhs.m_metadata_up) { 1790 m_metadata_up.reset(new ClangASTMetadata()); 1791 *m_metadata_up = *rhs.m_metadata_up; 1792 } 1793 return *this; 1794 } 1795 1796 bool Finalize() { 1797 return TypeSystemClang::AddObjCClassProperty( 1798 m_class_opaque_type, m_property_name, m_property_opaque_type, 1799 m_ivar_decl, m_property_setter_name, m_property_getter_name, 1800 m_property_attributes, m_metadata_up.get()); 1801 } 1802 1803 private: 1804 CompilerType m_class_opaque_type; 1805 const char *m_property_name; 1806 CompilerType m_property_opaque_type; 1807 clang::ObjCIvarDecl *m_ivar_decl; 1808 const char *m_property_setter_name; 1809 const char *m_property_getter_name; 1810 uint32_t m_property_attributes; 1811 std::unique_ptr<ClangASTMetadata> m_metadata_up; 1812 }; 1813 1814 bool DWARFASTParserClang::ParseTemplateDIE( 1815 const DWARFDIE &die, 1816 TypeSystemClang::TemplateParameterInfos &template_param_infos) { 1817 const dw_tag_t tag = die.Tag(); 1818 bool is_template_template_argument = false; 1819 1820 switch (tag) { 1821 case DW_TAG_GNU_template_parameter_pack: { 1822 template_param_infos.packed_args.reset( 1823 new TypeSystemClang::TemplateParameterInfos); 1824 for (DWARFDIE child_die = die.GetFirstChild(); child_die.IsValid(); 1825 child_die = child_die.GetSibling()) { 1826 if (!ParseTemplateDIE(child_die, *template_param_infos.packed_args)) 1827 return false; 1828 } 1829 if (const char *name = die.GetName()) { 1830 template_param_infos.pack_name = name; 1831 } 1832 return true; 1833 } 1834 case DW_TAG_GNU_template_template_param: 1835 is_template_template_argument = true; 1836 LLVM_FALLTHROUGH; 1837 case DW_TAG_template_type_parameter: 1838 case DW_TAG_template_value_parameter: { 1839 DWARFAttributes attributes; 1840 const size_t num_attributes = die.GetAttributes(attributes); 1841 const char *name = nullptr; 1842 const char *template_name = nullptr; 1843 CompilerType clang_type; 1844 uint64_t uval64 = 0; 1845 bool uval64_valid = false; 1846 if (num_attributes > 0) { 1847 DWARFFormValue form_value; 1848 for (size_t i = 0; i < num_attributes; ++i) { 1849 const dw_attr_t attr = attributes.AttributeAtIndex(i); 1850 1851 switch (attr) { 1852 case DW_AT_name: 1853 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1854 name = form_value.AsCString(); 1855 break; 1856 1857 case DW_AT_GNU_template_name: 1858 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1859 template_name = form_value.AsCString(); 1860 break; 1861 1862 case DW_AT_type: 1863 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1864 Type *lldb_type = die.ResolveTypeUID(form_value.Reference()); 1865 if (lldb_type) 1866 clang_type = lldb_type->GetForwardCompilerType(); 1867 } 1868 break; 1869 1870 case DW_AT_const_value: 1871 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1872 uval64_valid = true; 1873 uval64 = form_value.Unsigned(); 1874 } 1875 break; 1876 default: 1877 break; 1878 } 1879 } 1880 1881 clang::ASTContext &ast = m_ast.getASTContext(); 1882 if (!clang_type) 1883 clang_type = m_ast.GetBasicType(eBasicTypeVoid); 1884 1885 if (!is_template_template_argument) { 1886 bool is_signed = false; 1887 if (name && name[0]) 1888 template_param_infos.names.push_back(name); 1889 else 1890 template_param_infos.names.push_back(NULL); 1891 1892 // Get the signed value for any integer or enumeration if available 1893 clang_type.IsIntegerOrEnumerationType(is_signed); 1894 1895 if (tag == DW_TAG_template_value_parameter && uval64_valid) { 1896 llvm::Optional<uint64_t> size = clang_type.GetBitSize(nullptr); 1897 if (!size) 1898 return false; 1899 llvm::APInt apint(*size, uval64, is_signed); 1900 template_param_infos.args.push_back( 1901 clang::TemplateArgument(ast, llvm::APSInt(apint, !is_signed), 1902 ClangUtil::GetQualType(clang_type))); 1903 } else { 1904 template_param_infos.args.push_back( 1905 clang::TemplateArgument(ClangUtil::GetQualType(clang_type))); 1906 } 1907 } else { 1908 auto *tplt_type = m_ast.CreateTemplateTemplateParmDecl(template_name); 1909 template_param_infos.names.push_back(name); 1910 template_param_infos.args.push_back( 1911 clang::TemplateArgument(clang::TemplateName(tplt_type))); 1912 } 1913 } 1914 } 1915 return true; 1916 1917 default: 1918 break; 1919 } 1920 return false; 1921 } 1922 1923 bool DWARFASTParserClang::ParseTemplateParameterInfos( 1924 const DWARFDIE &parent_die, 1925 TypeSystemClang::TemplateParameterInfos &template_param_infos) { 1926 1927 if (!parent_die) 1928 return false; 1929 1930 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 1931 die = die.GetSibling()) { 1932 const dw_tag_t tag = die.Tag(); 1933 1934 switch (tag) { 1935 case DW_TAG_template_type_parameter: 1936 case DW_TAG_template_value_parameter: 1937 case DW_TAG_GNU_template_parameter_pack: 1938 case DW_TAG_GNU_template_template_param: 1939 ParseTemplateDIE(die, template_param_infos); 1940 break; 1941 1942 default: 1943 break; 1944 } 1945 } 1946 if (template_param_infos.args.empty()) 1947 return false; 1948 return template_param_infos.args.size() == template_param_infos.names.size(); 1949 } 1950 1951 bool DWARFASTParserClang::CompleteRecordType(const DWARFDIE &die, 1952 lldb_private::Type *type, 1953 CompilerType &clang_type) { 1954 const dw_tag_t tag = die.Tag(); 1955 SymbolFileDWARF *dwarf = die.GetDWARF(); 1956 1957 ClangASTImporter::LayoutInfo layout_info; 1958 1959 if (die.HasChildren()) { 1960 LanguageType class_language = eLanguageTypeUnknown; 1961 if (TypeSystemClang::IsObjCObjectOrInterfaceType(clang_type)) { 1962 class_language = eLanguageTypeObjC; 1963 // For objective C we don't start the definition when the class is 1964 // created. 1965 TypeSystemClang::StartTagDeclarationDefinition(clang_type); 1966 } 1967 1968 int tag_decl_kind = -1; 1969 AccessType default_accessibility = eAccessNone; 1970 if (tag == DW_TAG_structure_type) { 1971 tag_decl_kind = clang::TTK_Struct; 1972 default_accessibility = eAccessPublic; 1973 } else if (tag == DW_TAG_union_type) { 1974 tag_decl_kind = clang::TTK_Union; 1975 default_accessibility = eAccessPublic; 1976 } else if (tag == DW_TAG_class_type) { 1977 tag_decl_kind = clang::TTK_Class; 1978 default_accessibility = eAccessPrivate; 1979 } 1980 1981 std::vector<std::unique_ptr<clang::CXXBaseSpecifier>> bases; 1982 std::vector<int> member_accessibilities; 1983 bool is_a_class = false; 1984 // Parse members and base classes first 1985 std::vector<DWARFDIE> member_function_dies; 1986 1987 DelayedPropertyList delayed_properties; 1988 ParseChildMembers(die, clang_type, class_language, bases, 1989 member_accessibilities, member_function_dies, 1990 delayed_properties, default_accessibility, is_a_class, 1991 layout_info); 1992 1993 // Now parse any methods if there were any... 1994 for (const DWARFDIE &die : member_function_dies) 1995 dwarf->ResolveType(die); 1996 1997 if (class_language == eLanguageTypeObjC) { 1998 ConstString class_name(clang_type.GetTypeName()); 1999 if (class_name) { 2000 DIEArray method_die_offsets; 2001 dwarf->GetObjCMethodDIEOffsets(class_name, method_die_offsets); 2002 2003 if (!method_die_offsets.empty()) { 2004 DWARFDebugInfo &debug_info = dwarf->DebugInfo(); 2005 2006 const size_t num_matches = method_die_offsets.size(); 2007 for (size_t i = 0; i < num_matches; ++i) { 2008 const DIERef &die_ref = method_die_offsets[i]; 2009 DWARFDIE method_die = debug_info.GetDIE(die_ref); 2010 2011 if (method_die) 2012 method_die.ResolveType(); 2013 } 2014 } 2015 2016 for (DelayedPropertyList::iterator pi = delayed_properties.begin(), 2017 pe = delayed_properties.end(); 2018 pi != pe; ++pi) 2019 pi->Finalize(); 2020 } 2021 } 2022 2023 // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we 2024 // need to tell the clang type it is actually a class. 2025 if (class_language != eLanguageTypeObjC) { 2026 if (is_a_class && tag_decl_kind != clang::TTK_Class) 2027 m_ast.SetTagTypeKind(ClangUtil::GetQualType(clang_type), 2028 clang::TTK_Class); 2029 } 2030 2031 // Since DW_TAG_structure_type gets used for both classes and 2032 // structures, we may need to set any DW_TAG_member fields to have a 2033 // "private" access if none was specified. When we parsed the child 2034 // members we tracked that actual accessibility value for each 2035 // DW_TAG_member in the "member_accessibilities" array. If the value 2036 // for the member is zero, then it was set to the 2037 // "default_accessibility" which for structs was "public". Below we 2038 // correct this by setting any fields to "private" that weren't 2039 // correctly set. 2040 if (is_a_class && !member_accessibilities.empty()) { 2041 // This is a class and all members that didn't have their access 2042 // specified are private. 2043 m_ast.SetDefaultAccessForRecordFields( 2044 m_ast.GetAsRecordDecl(clang_type), eAccessPrivate, 2045 &member_accessibilities.front(), member_accessibilities.size()); 2046 } 2047 2048 if (!bases.empty()) { 2049 // Make sure all base classes refer to complete types and not forward 2050 // declarations. If we don't do this, clang will crash with an 2051 // assertion in the call to clang_type.TransferBaseClasses() 2052 for (const auto &base_class : bases) { 2053 clang::TypeSourceInfo *type_source_info = 2054 base_class->getTypeSourceInfo(); 2055 if (type_source_info) { 2056 CompilerType base_class_type = 2057 m_ast.GetType(type_source_info->getType()); 2058 if (!base_class_type.GetCompleteType()) { 2059 auto module = dwarf->GetObjectFile()->GetModule(); 2060 module->ReportError(":: Class '%s' has a base class '%s' which " 2061 "does not have a complete definition.", 2062 die.GetName(), 2063 base_class_type.GetTypeName().GetCString()); 2064 if (die.GetCU()->GetProducer() == eProducerClang) 2065 module->ReportError(":: Try compiling the source file with " 2066 "-fstandalone-debug."); 2067 2068 // We have no choice other than to pretend that the base class 2069 // is complete. If we don't do this, clang will crash when we 2070 // call setBases() inside of 2071 // "clang_type.TransferBaseClasses()" below. Since we 2072 // provide layout assistance, all ivars in this class and other 2073 // classes will be fine, this is the best we can do short of 2074 // crashing. 2075 if (TypeSystemClang::StartTagDeclarationDefinition( 2076 base_class_type)) { 2077 TypeSystemClang::CompleteTagDeclarationDefinition( 2078 base_class_type); 2079 } 2080 } 2081 } 2082 } 2083 2084 m_ast.TransferBaseClasses(clang_type.GetOpaqueQualType(), 2085 std::move(bases)); 2086 } 2087 } 2088 2089 m_ast.AddMethodOverridesForCXXRecordType(clang_type.GetOpaqueQualType()); 2090 TypeSystemClang::BuildIndirectFields(clang_type); 2091 TypeSystemClang::CompleteTagDeclarationDefinition(clang_type); 2092 2093 if (!layout_info.field_offsets.empty() || !layout_info.base_offsets.empty() || 2094 !layout_info.vbase_offsets.empty()) { 2095 if (type) 2096 layout_info.bit_size = type->GetByteSize().getValueOr(0) * 8; 2097 if (layout_info.bit_size == 0) 2098 layout_info.bit_size = 2099 die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 0) * 8; 2100 2101 clang::CXXRecordDecl *record_decl = 2102 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 2103 if (record_decl) 2104 GetClangASTImporter().SetRecordLayout(record_decl, layout_info); 2105 } 2106 2107 return (bool)clang_type; 2108 } 2109 2110 bool DWARFASTParserClang::CompleteEnumType(const DWARFDIE &die, 2111 lldb_private::Type *type, 2112 CompilerType &clang_type) { 2113 if (TypeSystemClang::StartTagDeclarationDefinition(clang_type)) { 2114 if (die.HasChildren()) { 2115 bool is_signed = false; 2116 clang_type.IsIntegerType(is_signed); 2117 ParseChildEnumerators(clang_type, is_signed, 2118 type->GetByteSize().getValueOr(0), die); 2119 } 2120 TypeSystemClang::CompleteTagDeclarationDefinition(clang_type); 2121 } 2122 return (bool)clang_type; 2123 } 2124 2125 bool DWARFASTParserClang::CompleteTypeFromDWARF(const DWARFDIE &die, 2126 lldb_private::Type *type, 2127 CompilerType &clang_type) { 2128 SymbolFileDWARF *dwarf = die.GetDWARF(); 2129 2130 std::lock_guard<std::recursive_mutex> guard( 2131 dwarf->GetObjectFile()->GetModule()->GetMutex()); 2132 2133 // Disable external storage for this type so we don't get anymore 2134 // clang::ExternalASTSource queries for this type. 2135 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), false); 2136 2137 if (!die) 2138 return false; 2139 2140 const dw_tag_t tag = die.Tag(); 2141 2142 Log *log = 2143 nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION)); 2144 if (log) 2145 dwarf->GetObjectFile()->GetModule()->LogMessageVerboseBacktrace( 2146 log, "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...", 2147 die.GetID(), die.GetTagAsCString(), type->GetName().AsCString()); 2148 assert(clang_type); 2149 DWARFAttributes attributes; 2150 switch (tag) { 2151 case DW_TAG_structure_type: 2152 case DW_TAG_union_type: 2153 case DW_TAG_class_type: 2154 return CompleteRecordType(die, type, clang_type); 2155 case DW_TAG_enumeration_type: 2156 return CompleteEnumType(die, type, clang_type); 2157 default: 2158 assert(false && "not a forward clang type decl!"); 2159 break; 2160 } 2161 2162 return false; 2163 } 2164 2165 void DWARFASTParserClang::EnsureAllDIEsInDeclContextHaveBeenParsed( 2166 lldb_private::CompilerDeclContext decl_context) { 2167 auto opaque_decl_ctx = 2168 (clang::DeclContext *)decl_context.GetOpaqueDeclContext(); 2169 for (auto it = m_decl_ctx_to_die.find(opaque_decl_ctx); 2170 it != m_decl_ctx_to_die.end() && it->first == opaque_decl_ctx; 2171 it = m_decl_ctx_to_die.erase(it)) 2172 for (DWARFDIE decl = it->second.GetFirstChild(); decl; 2173 decl = decl.GetSibling()) 2174 GetClangDeclForDIE(decl); 2175 } 2176 2177 CompilerDecl DWARFASTParserClang::GetDeclForUIDFromDWARF(const DWARFDIE &die) { 2178 clang::Decl *clang_decl = GetClangDeclForDIE(die); 2179 if (clang_decl != nullptr) 2180 return m_ast.GetCompilerDecl(clang_decl); 2181 return CompilerDecl(); 2182 } 2183 2184 CompilerDeclContext 2185 DWARFASTParserClang::GetDeclContextForUIDFromDWARF(const DWARFDIE &die) { 2186 clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE(die); 2187 if (clang_decl_ctx) 2188 return m_ast.CreateDeclContext(clang_decl_ctx); 2189 return CompilerDeclContext(); 2190 } 2191 2192 CompilerDeclContext 2193 DWARFASTParserClang::GetDeclContextContainingUIDFromDWARF(const DWARFDIE &die) { 2194 clang::DeclContext *clang_decl_ctx = 2195 GetClangDeclContextContainingDIE(die, nullptr); 2196 if (clang_decl_ctx) 2197 return m_ast.CreateDeclContext(clang_decl_ctx); 2198 return CompilerDeclContext(); 2199 } 2200 2201 size_t DWARFASTParserClang::ParseChildEnumerators( 2202 lldb_private::CompilerType &clang_type, bool is_signed, 2203 uint32_t enumerator_byte_size, const DWARFDIE &parent_die) { 2204 if (!parent_die) 2205 return 0; 2206 2207 size_t enumerators_added = 0; 2208 2209 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2210 die = die.GetSibling()) { 2211 const dw_tag_t tag = die.Tag(); 2212 if (tag == DW_TAG_enumerator) { 2213 DWARFAttributes attributes; 2214 const size_t num_child_attributes = die.GetAttributes(attributes); 2215 if (num_child_attributes > 0) { 2216 const char *name = nullptr; 2217 bool got_value = false; 2218 int64_t enum_value = 0; 2219 Declaration decl; 2220 2221 uint32_t i; 2222 for (i = 0; i < num_child_attributes; ++i) { 2223 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2224 DWARFFormValue form_value; 2225 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2226 switch (attr) { 2227 case DW_AT_const_value: 2228 got_value = true; 2229 if (is_signed) 2230 enum_value = form_value.Signed(); 2231 else 2232 enum_value = form_value.Unsigned(); 2233 break; 2234 2235 case DW_AT_name: 2236 name = form_value.AsCString(); 2237 break; 2238 2239 case DW_AT_description: 2240 default: 2241 case DW_AT_decl_file: 2242 decl.SetFile(die.GetCU()->GetFile(form_value.Unsigned())); 2243 break; 2244 case DW_AT_decl_line: 2245 decl.SetLine(form_value.Unsigned()); 2246 break; 2247 case DW_AT_decl_column: 2248 decl.SetColumn(form_value.Unsigned()); 2249 break; 2250 case DW_AT_sibling: 2251 break; 2252 } 2253 } 2254 } 2255 2256 if (name && name[0] && got_value) { 2257 m_ast.AddEnumerationValueToEnumerationType( 2258 clang_type, decl, name, enum_value, enumerator_byte_size * 8); 2259 ++enumerators_added; 2260 } 2261 } 2262 } 2263 } 2264 return enumerators_added; 2265 } 2266 2267 Function *DWARFASTParserClang::ParseFunctionFromDWARF(CompileUnit &comp_unit, 2268 const DWARFDIE &die) { 2269 DWARFRangeList func_ranges; 2270 const char *name = nullptr; 2271 const char *mangled = nullptr; 2272 int decl_file = 0; 2273 int decl_line = 0; 2274 int decl_column = 0; 2275 int call_file = 0; 2276 int call_line = 0; 2277 int call_column = 0; 2278 DWARFExpression frame_base; 2279 2280 const dw_tag_t tag = die.Tag(); 2281 2282 if (tag != DW_TAG_subprogram) 2283 return nullptr; 2284 2285 if (die.GetDIENamesAndRanges(name, mangled, func_ranges, decl_file, decl_line, 2286 decl_column, call_file, call_line, call_column, 2287 &frame_base)) { 2288 2289 // Union of all ranges in the function DIE (if the function is 2290 // discontiguous) 2291 AddressRange func_range; 2292 lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase(0); 2293 lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd(0); 2294 if (lowest_func_addr != LLDB_INVALID_ADDRESS && 2295 lowest_func_addr <= highest_func_addr) { 2296 ModuleSP module_sp(die.GetModule()); 2297 func_range.GetBaseAddress().ResolveAddressUsingFileSections( 2298 lowest_func_addr, module_sp->GetSectionList()); 2299 if (func_range.GetBaseAddress().IsValid()) 2300 func_range.SetByteSize(highest_func_addr - lowest_func_addr); 2301 } 2302 2303 if (func_range.GetBaseAddress().IsValid()) { 2304 Mangled func_name; 2305 if (mangled) 2306 func_name.SetValue(ConstString(mangled), true); 2307 else if ((die.GetParent().Tag() == DW_TAG_compile_unit || 2308 die.GetParent().Tag() == DW_TAG_partial_unit) && 2309 Language::LanguageIsCPlusPlus( 2310 SymbolFileDWARF::GetLanguage(*die.GetCU())) && 2311 !Language::LanguageIsObjC( 2312 SymbolFileDWARF::GetLanguage(*die.GetCU())) && 2313 name && strcmp(name, "main") != 0) { 2314 // If the mangled name is not present in the DWARF, generate the 2315 // demangled name using the decl context. We skip if the function is 2316 // "main" as its name is never mangled. 2317 bool is_static = false; 2318 bool is_variadic = false; 2319 bool has_template_params = false; 2320 unsigned type_quals = 0; 2321 std::vector<CompilerType> param_types; 2322 std::vector<clang::ParmVarDecl *> param_decls; 2323 StreamString sstr; 2324 2325 DWARFDeclContext decl_ctx = SymbolFileDWARF::GetDWARFDeclContext(die); 2326 sstr << decl_ctx.GetQualifiedName(); 2327 2328 clang::DeclContext *containing_decl_ctx = 2329 GetClangDeclContextContainingDIE(die, nullptr); 2330 ParseChildParameters(containing_decl_ctx, die, true, is_static, 2331 is_variadic, has_template_params, param_types, 2332 param_decls, type_quals); 2333 sstr << "("; 2334 for (size_t i = 0; i < param_types.size(); i++) { 2335 if (i > 0) 2336 sstr << ", "; 2337 sstr << param_types[i].GetTypeName(); 2338 } 2339 if (is_variadic) 2340 sstr << ", ..."; 2341 sstr << ")"; 2342 if (type_quals & clang::Qualifiers::Const) 2343 sstr << " const"; 2344 2345 func_name.SetValue(ConstString(sstr.GetString()), false); 2346 } else 2347 func_name.SetValue(ConstString(name), false); 2348 2349 FunctionSP func_sp; 2350 std::unique_ptr<Declaration> decl_up; 2351 if (decl_file != 0 || decl_line != 0 || decl_column != 0) 2352 decl_up.reset(new Declaration(die.GetCU()->GetFile(decl_file), 2353 decl_line, decl_column)); 2354 2355 SymbolFileDWARF *dwarf = die.GetDWARF(); 2356 // Supply the type _only_ if it has already been parsed 2357 Type *func_type = dwarf->GetDIEToType().lookup(die.GetDIE()); 2358 2359 assert(func_type == nullptr || func_type != DIE_IS_BEING_PARSED); 2360 2361 if (dwarf->FixupAddress(func_range.GetBaseAddress())) { 2362 const user_id_t func_user_id = die.GetID(); 2363 func_sp = 2364 std::make_shared<Function>(&comp_unit, 2365 func_user_id, // UserID is the DIE offset 2366 func_user_id, func_name, func_type, 2367 func_range); // first address range 2368 2369 if (func_sp.get() != nullptr) { 2370 if (frame_base.IsValid()) 2371 func_sp->GetFrameBaseExpression() = frame_base; 2372 comp_unit.AddFunction(func_sp); 2373 return func_sp.get(); 2374 } 2375 } 2376 } 2377 } 2378 return nullptr; 2379 } 2380 2381 void DWARFASTParserClang::ParseSingleMember( 2382 const DWARFDIE &die, const DWARFDIE &parent_die, 2383 lldb_private::CompilerType &class_clang_type, 2384 const lldb::LanguageType class_language, 2385 std::vector<int> &member_accessibilities, 2386 lldb::AccessType &default_accessibility, 2387 DelayedPropertyList &delayed_properties, 2388 lldb_private::ClangASTImporter::LayoutInfo &layout_info, 2389 FieldInfo &last_field_info) { 2390 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule(); 2391 const dw_tag_t tag = die.Tag(); 2392 // Get the parent byte size so we can verify any members will fit 2393 const uint64_t parent_byte_size = 2394 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, UINT64_MAX); 2395 const uint64_t parent_bit_size = 2396 parent_byte_size == UINT64_MAX ? UINT64_MAX : parent_byte_size * 8; 2397 2398 DWARFAttributes attributes; 2399 const size_t num_attributes = die.GetAttributes(attributes); 2400 if (num_attributes > 0) { 2401 const char *name = nullptr; 2402 const char *prop_name = nullptr; 2403 const char *prop_getter_name = nullptr; 2404 const char *prop_setter_name = nullptr; 2405 uint32_t prop_attributes = 0; 2406 2407 bool is_artificial = false; 2408 DWARFFormValue encoding_form; 2409 AccessType accessibility = eAccessNone; 2410 uint32_t member_byte_offset = 2411 (parent_die.Tag() == DW_TAG_union_type) ? 0 : UINT32_MAX; 2412 llvm::Optional<uint64_t> byte_size; 2413 int64_t bit_offset = 0; 2414 uint64_t data_bit_offset = UINT64_MAX; 2415 size_t bit_size = 0; 2416 bool is_external = 2417 false; // On DW_TAG_members, this means the member is static 2418 uint32_t i; 2419 for (i = 0; i < num_attributes && !is_artificial; ++i) { 2420 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2421 DWARFFormValue form_value; 2422 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2423 // DW_AT_data_member_location indicates the byte offset of the 2424 // word from the base address of the structure. 2425 // 2426 // DW_AT_bit_offset indicates how many bits into the word 2427 // (according to the host endianness) the low-order bit of the 2428 // field starts. AT_bit_offset can be negative. 2429 // 2430 // DW_AT_bit_size indicates the size of the field in bits. 2431 switch (attr) { 2432 case DW_AT_name: 2433 name = form_value.AsCString(); 2434 break; 2435 case DW_AT_type: 2436 encoding_form = form_value; 2437 break; 2438 case DW_AT_bit_offset: 2439 bit_offset = form_value.Signed(); 2440 break; 2441 case DW_AT_bit_size: 2442 bit_size = form_value.Unsigned(); 2443 break; 2444 case DW_AT_byte_size: 2445 byte_size = form_value.Unsigned(); 2446 break; 2447 case DW_AT_data_bit_offset: 2448 data_bit_offset = form_value.Unsigned(); 2449 break; 2450 case DW_AT_data_member_location: 2451 if (form_value.BlockData()) { 2452 Value initialValue(0); 2453 Value memberOffset(0); 2454 const DWARFDataExtractor &debug_info_data = die.GetData(); 2455 uint32_t block_length = form_value.Unsigned(); 2456 uint32_t block_offset = 2457 form_value.BlockData() - debug_info_data.GetDataStart(); 2458 if (DWARFExpression::Evaluate( 2459 nullptr, // ExecutionContext * 2460 nullptr, // RegisterContext * 2461 module_sp, 2462 DataExtractor(debug_info_data, block_offset, block_length), 2463 die.GetCU(), eRegisterKindDWARF, &initialValue, nullptr, 2464 memberOffset, nullptr)) { 2465 member_byte_offset = memberOffset.ResolveValue(nullptr).UInt(); 2466 } 2467 } else { 2468 // With DWARF 3 and later, if the value is an integer constant, 2469 // this form value is the offset in bytes from the beginning of 2470 // the containing entity. 2471 member_byte_offset = form_value.Unsigned(); 2472 } 2473 break; 2474 2475 case DW_AT_accessibility: 2476 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 2477 break; 2478 case DW_AT_artificial: 2479 is_artificial = form_value.Boolean(); 2480 break; 2481 case DW_AT_APPLE_property_name: 2482 prop_name = form_value.AsCString(); 2483 break; 2484 case DW_AT_APPLE_property_getter: 2485 prop_getter_name = form_value.AsCString(); 2486 break; 2487 case DW_AT_APPLE_property_setter: 2488 prop_setter_name = form_value.AsCString(); 2489 break; 2490 case DW_AT_APPLE_property_attribute: 2491 prop_attributes = form_value.Unsigned(); 2492 break; 2493 case DW_AT_external: 2494 is_external = form_value.Boolean(); 2495 break; 2496 2497 default: 2498 case DW_AT_declaration: 2499 case DW_AT_description: 2500 case DW_AT_mutable: 2501 case DW_AT_visibility: 2502 case DW_AT_sibling: 2503 break; 2504 } 2505 } 2506 } 2507 2508 if (prop_name) { 2509 ConstString fixed_setter; 2510 2511 // Check if the property getter/setter were provided as full names. 2512 // We want basenames, so we extract them. 2513 2514 if (prop_getter_name && prop_getter_name[0] == '-') { 2515 ObjCLanguage::MethodName prop_getter_method(prop_getter_name, true); 2516 prop_getter_name = prop_getter_method.GetSelector().GetCString(); 2517 } 2518 2519 if (prop_setter_name && prop_setter_name[0] == '-') { 2520 ObjCLanguage::MethodName prop_setter_method(prop_setter_name, true); 2521 prop_setter_name = prop_setter_method.GetSelector().GetCString(); 2522 } 2523 2524 // If the names haven't been provided, they need to be filled in. 2525 2526 if (!prop_getter_name) { 2527 prop_getter_name = prop_name; 2528 } 2529 if (!prop_setter_name && prop_name[0] && 2530 !(prop_attributes & DW_APPLE_PROPERTY_readonly)) { 2531 StreamString ss; 2532 2533 ss.Printf("set%c%s:", toupper(prop_name[0]), &prop_name[1]); 2534 2535 fixed_setter.SetString(ss.GetString()); 2536 prop_setter_name = fixed_setter.GetCString(); 2537 } 2538 } 2539 2540 // Clang has a DWARF generation bug where sometimes it represents 2541 // fields that are references with bad byte size and bit size/offset 2542 // information such as: 2543 // 2544 // DW_AT_byte_size( 0x00 ) 2545 // DW_AT_bit_size( 0x40 ) 2546 // DW_AT_bit_offset( 0xffffffffffffffc0 ) 2547 // 2548 // So check the bit offset to make sure it is sane, and if the values 2549 // are not sane, remove them. If we don't do this then we will end up 2550 // with a crash if we try to use this type in an expression when clang 2551 // becomes unhappy with its recycled debug info. 2552 2553 if (byte_size.getValueOr(0) == 0 && bit_offset < 0) { 2554 bit_size = 0; 2555 bit_offset = 0; 2556 } 2557 2558 // FIXME: Make Clang ignore Objective-C accessibility for expressions 2559 if (class_language == eLanguageTypeObjC || 2560 class_language == eLanguageTypeObjC_plus_plus) 2561 accessibility = eAccessNone; 2562 2563 // Handle static members 2564 if (is_external && member_byte_offset == UINT32_MAX) { 2565 Type *var_type = die.ResolveTypeUID(encoding_form.Reference()); 2566 2567 if (var_type) { 2568 if (accessibility == eAccessNone) 2569 accessibility = eAccessPublic; 2570 TypeSystemClang::AddVariableToRecordType( 2571 class_clang_type, name, var_type->GetLayoutCompilerType(), 2572 accessibility); 2573 } 2574 return; 2575 } 2576 2577 if (!is_artificial) { 2578 Type *member_type = die.ResolveTypeUID(encoding_form.Reference()); 2579 2580 clang::FieldDecl *field_decl = nullptr; 2581 const uint64_t character_width = 8; 2582 const uint64_t word_width = 32; 2583 if (tag == DW_TAG_member) { 2584 if (member_type) { 2585 CompilerType member_clang_type = member_type->GetLayoutCompilerType(); 2586 2587 if (accessibility == eAccessNone) 2588 accessibility = default_accessibility; 2589 member_accessibilities.push_back(accessibility); 2590 2591 uint64_t field_bit_offset = 2592 (member_byte_offset == UINT32_MAX ? 0 : (member_byte_offset * 8)); 2593 2594 if (bit_size > 0) { 2595 FieldInfo this_field_info; 2596 this_field_info.bit_offset = field_bit_offset; 2597 this_field_info.bit_size = bit_size; 2598 2599 if (data_bit_offset != UINT64_MAX) { 2600 this_field_info.bit_offset = data_bit_offset; 2601 } else { 2602 if (!byte_size) 2603 byte_size = member_type->GetByteSize(); 2604 2605 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 2606 if (objfile->GetByteOrder() == eByteOrderLittle) { 2607 this_field_info.bit_offset += byte_size.getValueOr(0) * 8; 2608 this_field_info.bit_offset -= (bit_offset + bit_size); 2609 } else { 2610 this_field_info.bit_offset += bit_offset; 2611 } 2612 } 2613 2614 if ((this_field_info.bit_offset >= parent_bit_size) || 2615 (last_field_info.IsBitfield() && 2616 !last_field_info.NextBitfieldOffsetIsValid( 2617 this_field_info.bit_offset))) { 2618 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 2619 objfile->GetModule()->ReportWarning( 2620 "0x%8.8" PRIx64 ": %s bitfield named \"%s\" has invalid " 2621 "bit offset (0x%8.8" PRIx64 2622 ") member will be ignored. Please file a bug against the " 2623 "compiler and include the preprocessed output for %s\n", 2624 die.GetID(), DW_TAG_value_to_name(tag), name, 2625 this_field_info.bit_offset, GetUnitName(parent_die).c_str()); 2626 return; 2627 } 2628 2629 // Update the field bit offset we will report for layout 2630 field_bit_offset = this_field_info.bit_offset; 2631 2632 // Objective-C has invalid DW_AT_bit_offset values in older 2633 // versions of clang, so we have to be careful and only insert 2634 // unnamed bitfields if we have a new enough clang. 2635 bool detect_unnamed_bitfields = true; 2636 2637 if (class_language == eLanguageTypeObjC || 2638 class_language == eLanguageTypeObjC_plus_plus) 2639 detect_unnamed_bitfields = 2640 die.GetCU()->Supports_unnamed_objc_bitfields(); 2641 2642 if (detect_unnamed_bitfields) { 2643 clang::Optional<FieldInfo> unnamed_field_info; 2644 uint64_t last_field_end = 0; 2645 2646 last_field_end = 2647 last_field_info.bit_offset + last_field_info.bit_size; 2648 2649 if (!last_field_info.IsBitfield()) { 2650 // The last field was not a bit-field... 2651 // but if it did take up the entire word then we need to extend 2652 // last_field_end so the bit-field does not step into the last 2653 // fields padding. 2654 if (last_field_end != 0 && ((last_field_end % word_width) != 0)) 2655 last_field_end += word_width - (last_field_end % word_width); 2656 } 2657 2658 // If we have a gap between the last_field_end and the current 2659 // field we have an unnamed bit-field 2660 if (this_field_info.bit_offset != last_field_end && 2661 !(this_field_info.bit_offset < last_field_end)) { 2662 unnamed_field_info = FieldInfo{}; 2663 unnamed_field_info->bit_size = 2664 this_field_info.bit_offset - last_field_end; 2665 unnamed_field_info->bit_offset = last_field_end; 2666 } 2667 2668 if (unnamed_field_info) { 2669 clang::FieldDecl *unnamed_bitfield_decl = 2670 TypeSystemClang::AddFieldToRecordType( 2671 class_clang_type, llvm::StringRef(), 2672 m_ast.GetBuiltinTypeForEncodingAndBitSize(eEncodingSint, 2673 word_width), 2674 accessibility, unnamed_field_info->bit_size); 2675 2676 layout_info.field_offsets.insert(std::make_pair( 2677 unnamed_bitfield_decl, unnamed_field_info->bit_offset)); 2678 } 2679 } 2680 2681 last_field_info = this_field_info; 2682 last_field_info.SetIsBitfield(true); 2683 } else { 2684 last_field_info.bit_offset = field_bit_offset; 2685 2686 if (llvm::Optional<uint64_t> clang_type_size = 2687 member_clang_type.GetByteSize(nullptr)) { 2688 last_field_info.bit_size = *clang_type_size * character_width; 2689 } 2690 2691 last_field_info.SetIsBitfield(false); 2692 } 2693 2694 if (!member_clang_type.IsCompleteType()) 2695 member_clang_type.GetCompleteType(); 2696 2697 { 2698 // Older versions of clang emit array[0] and array[1] in the 2699 // same way (<rdar://problem/12566646>). If the current field 2700 // is at the end of the structure, then there is definitely no 2701 // room for extra elements and we override the type to 2702 // array[0]. 2703 2704 CompilerType member_array_element_type; 2705 uint64_t member_array_size; 2706 bool member_array_is_incomplete; 2707 2708 if (member_clang_type.IsArrayType(&member_array_element_type, 2709 &member_array_size, 2710 &member_array_is_incomplete) && 2711 !member_array_is_incomplete) { 2712 uint64_t parent_byte_size = 2713 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 2714 UINT64_MAX); 2715 2716 if (member_byte_offset >= parent_byte_size) { 2717 if (member_array_size != 1 && 2718 (member_array_size != 0 || 2719 member_byte_offset > parent_byte_size)) { 2720 module_sp->ReportError( 2721 "0x%8.8" PRIx64 2722 ": DW_TAG_member '%s' refers to type 0x%8.8x" 2723 " which extends beyond the bounds of 0x%8.8" PRIx64, 2724 die.GetID(), name, encoding_form.Reference().GetOffset(), 2725 parent_die.GetID()); 2726 } 2727 2728 member_clang_type = 2729 m_ast.CreateArrayType(member_array_element_type, 0, false); 2730 } 2731 } 2732 } 2733 2734 if (TypeSystemClang::IsCXXClassType(member_clang_type) && 2735 !member_clang_type.GetCompleteType()) { 2736 if (die.GetCU()->GetProducer() == eProducerClang) 2737 module_sp->ReportError( 2738 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 2739 "0x%8.8x (%s) whose type is a forward declaration, not a " 2740 "complete definition.\nTry compiling the source file " 2741 "with -fstandalone-debug", 2742 parent_die.GetOffset(), parent_die.GetName(), die.GetOffset(), 2743 name); 2744 else 2745 module_sp->ReportError( 2746 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 2747 "0x%8.8x (%s) whose type is a forward declaration, not a " 2748 "complete definition.\nPlease file a bug against the " 2749 "compiler and include the preprocessed output for %s", 2750 parent_die.GetOffset(), parent_die.GetName(), die.GetOffset(), 2751 name, GetUnitName(parent_die).c_str()); 2752 // We have no choice other than to pretend that the member 2753 // class is complete. If we don't do this, clang will crash 2754 // when trying to layout the class. Since we provide layout 2755 // assistance, all ivars in this class and other classes will 2756 // be fine, this is the best we can do short of crashing. 2757 if (TypeSystemClang::StartTagDeclarationDefinition( 2758 member_clang_type)) { 2759 TypeSystemClang::CompleteTagDeclarationDefinition( 2760 member_clang_type); 2761 } else { 2762 module_sp->ReportError( 2763 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 2764 "0x%8.8x (%s) whose type claims to be a C++ class but we " 2765 "were not able to start its definition.\nPlease file a " 2766 "bug and attach the file at the start of this error " 2767 "message", 2768 parent_die.GetOffset(), parent_die.GetName(), die.GetOffset(), 2769 name); 2770 } 2771 } 2772 2773 field_decl = TypeSystemClang::AddFieldToRecordType( 2774 class_clang_type, name, member_clang_type, accessibility, 2775 bit_size); 2776 2777 m_ast.SetMetadataAsUserID(field_decl, die.GetID()); 2778 2779 layout_info.field_offsets.insert( 2780 std::make_pair(field_decl, field_bit_offset)); 2781 } else { 2782 if (name) 2783 module_sp->ReportError( 2784 "0x%8.8" PRIx64 ": DW_TAG_member '%s' refers to type 0x%8.8x" 2785 " which was unable to be parsed", 2786 die.GetID(), name, encoding_form.Reference().GetOffset()); 2787 else 2788 module_sp->ReportError( 2789 "0x%8.8" PRIx64 ": DW_TAG_member refers to type 0x%8.8x" 2790 " which was unable to be parsed", 2791 die.GetID(), encoding_form.Reference().GetOffset()); 2792 } 2793 } 2794 2795 if (prop_name != nullptr && member_type) { 2796 clang::ObjCIvarDecl *ivar_decl = nullptr; 2797 2798 if (field_decl) { 2799 ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl); 2800 assert(ivar_decl != nullptr); 2801 } 2802 2803 ClangASTMetadata metadata; 2804 metadata.SetUserID(die.GetID()); 2805 delayed_properties.push_back(DelayedAddObjCClassProperty( 2806 class_clang_type, prop_name, member_type->GetLayoutCompilerType(), 2807 ivar_decl, prop_setter_name, prop_getter_name, prop_attributes, 2808 &metadata)); 2809 2810 if (ivar_decl) 2811 m_ast.SetMetadataAsUserID(ivar_decl, die.GetID()); 2812 } 2813 } 2814 } 2815 } 2816 2817 bool DWARFASTParserClang::ParseChildMembers( 2818 const DWARFDIE &parent_die, CompilerType &class_clang_type, 2819 const LanguageType class_language, 2820 std::vector<std::unique_ptr<clang::CXXBaseSpecifier>> &base_classes, 2821 std::vector<int> &member_accessibilities, 2822 std::vector<DWARFDIE> &member_function_dies, 2823 DelayedPropertyList &delayed_properties, AccessType &default_accessibility, 2824 bool &is_a_class, ClangASTImporter::LayoutInfo &layout_info) { 2825 if (!parent_die) 2826 return false; 2827 2828 FieldInfo last_field_info; 2829 2830 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule(); 2831 TypeSystemClang *ast = 2832 llvm::dyn_cast_or_null<TypeSystemClang>(class_clang_type.GetTypeSystem()); 2833 if (ast == nullptr) 2834 return false; 2835 2836 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2837 die = die.GetSibling()) { 2838 dw_tag_t tag = die.Tag(); 2839 2840 switch (tag) { 2841 case DW_TAG_member: 2842 case DW_TAG_APPLE_property: 2843 ParseSingleMember(die, parent_die, class_clang_type, class_language, 2844 member_accessibilities, default_accessibility, 2845 delayed_properties, layout_info, last_field_info); 2846 break; 2847 2848 case DW_TAG_subprogram: 2849 // Let the type parsing code handle this one for us. 2850 member_function_dies.push_back(die); 2851 break; 2852 2853 case DW_TAG_inheritance: { 2854 is_a_class = true; 2855 if (default_accessibility == eAccessNone) 2856 default_accessibility = eAccessPrivate; 2857 // TODO: implement DW_TAG_inheritance type parsing 2858 DWARFAttributes attributes; 2859 const size_t num_attributes = die.GetAttributes(attributes); 2860 if (num_attributes > 0) { 2861 DWARFFormValue encoding_form; 2862 AccessType accessibility = default_accessibility; 2863 bool is_virtual = false; 2864 bool is_base_of_class = true; 2865 off_t member_byte_offset = 0; 2866 uint32_t i; 2867 for (i = 0; i < num_attributes; ++i) { 2868 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2869 DWARFFormValue form_value; 2870 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2871 switch (attr) { 2872 case DW_AT_type: 2873 encoding_form = form_value; 2874 break; 2875 case DW_AT_data_member_location: 2876 if (form_value.BlockData()) { 2877 Value initialValue(0); 2878 Value memberOffset(0); 2879 const DWARFDataExtractor &debug_info_data = die.GetData(); 2880 uint32_t block_length = form_value.Unsigned(); 2881 uint32_t block_offset = 2882 form_value.BlockData() - debug_info_data.GetDataStart(); 2883 if (DWARFExpression::Evaluate( 2884 nullptr, nullptr, module_sp, 2885 DataExtractor(debug_info_data, block_offset, 2886 block_length), 2887 die.GetCU(), eRegisterKindDWARF, &initialValue, nullptr, 2888 memberOffset, nullptr)) { 2889 member_byte_offset = 2890 memberOffset.ResolveValue(nullptr).UInt(); 2891 } 2892 } else { 2893 // With DWARF 3 and later, if the value is an integer constant, 2894 // this form value is the offset in bytes from the beginning of 2895 // the containing entity. 2896 member_byte_offset = form_value.Unsigned(); 2897 } 2898 break; 2899 2900 case DW_AT_accessibility: 2901 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 2902 break; 2903 2904 case DW_AT_virtuality: 2905 is_virtual = form_value.Boolean(); 2906 break; 2907 2908 case DW_AT_sibling: 2909 break; 2910 2911 default: 2912 break; 2913 } 2914 } 2915 } 2916 2917 Type *base_class_type = die.ResolveTypeUID(encoding_form.Reference()); 2918 if (base_class_type == nullptr) { 2919 module_sp->ReportError("0x%8.8x: DW_TAG_inheritance failed to " 2920 "resolve the base class at 0x%8.8x" 2921 " from enclosing type 0x%8.8x. \nPlease file " 2922 "a bug and attach the file at the start of " 2923 "this error message", 2924 die.GetOffset(), 2925 encoding_form.Reference().GetOffset(), 2926 parent_die.GetOffset()); 2927 break; 2928 } 2929 2930 CompilerType base_class_clang_type = 2931 base_class_type->GetFullCompilerType(); 2932 assert(base_class_clang_type); 2933 if (class_language == eLanguageTypeObjC) { 2934 ast->SetObjCSuperClass(class_clang_type, base_class_clang_type); 2935 } else { 2936 std::unique_ptr<clang::CXXBaseSpecifier> result = 2937 ast->CreateBaseClassSpecifier( 2938 base_class_clang_type.GetOpaqueQualType(), accessibility, 2939 is_virtual, is_base_of_class); 2940 if (!result) 2941 break; 2942 2943 base_classes.push_back(std::move(result)); 2944 2945 if (is_virtual) { 2946 // Do not specify any offset for virtual inheritance. The DWARF 2947 // produced by clang doesn't give us a constant offset, but gives 2948 // us a DWARF expressions that requires an actual object in memory. 2949 // the DW_AT_data_member_location for a virtual base class looks 2950 // like: 2951 // DW_AT_data_member_location( DW_OP_dup, DW_OP_deref, 2952 // DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref, 2953 // DW_OP_plus ) 2954 // Given this, there is really no valid response we can give to 2955 // clang for virtual base class offsets, and this should eventually 2956 // be removed from LayoutRecordType() in the external 2957 // AST source in clang. 2958 } else { 2959 layout_info.base_offsets.insert(std::make_pair( 2960 ast->GetAsCXXRecordDecl( 2961 base_class_clang_type.GetOpaqueQualType()), 2962 clang::CharUnits::fromQuantity(member_byte_offset))); 2963 } 2964 } 2965 } 2966 } break; 2967 2968 default: 2969 break; 2970 } 2971 } 2972 2973 return true; 2974 } 2975 2976 size_t DWARFASTParserClang::ParseChildParameters( 2977 clang::DeclContext *containing_decl_ctx, const DWARFDIE &parent_die, 2978 bool skip_artificial, bool &is_static, bool &is_variadic, 2979 bool &has_template_params, std::vector<CompilerType> &function_param_types, 2980 std::vector<clang::ParmVarDecl *> &function_param_decls, 2981 unsigned &type_quals) { 2982 if (!parent_die) 2983 return 0; 2984 2985 size_t arg_idx = 0; 2986 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2987 die = die.GetSibling()) { 2988 const dw_tag_t tag = die.Tag(); 2989 switch (tag) { 2990 case DW_TAG_formal_parameter: { 2991 DWARFAttributes attributes; 2992 const size_t num_attributes = die.GetAttributes(attributes); 2993 if (num_attributes > 0) { 2994 const char *name = nullptr; 2995 DWARFFormValue param_type_die_form; 2996 bool is_artificial = false; 2997 // one of None, Auto, Register, Extern, Static, PrivateExtern 2998 2999 clang::StorageClass storage = clang::SC_None; 3000 uint32_t i; 3001 for (i = 0; i < num_attributes; ++i) { 3002 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3003 DWARFFormValue form_value; 3004 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3005 switch (attr) { 3006 case DW_AT_name: 3007 name = form_value.AsCString(); 3008 break; 3009 case DW_AT_type: 3010 param_type_die_form = form_value; 3011 break; 3012 case DW_AT_artificial: 3013 is_artificial = form_value.Boolean(); 3014 break; 3015 case DW_AT_location: 3016 case DW_AT_const_value: 3017 case DW_AT_default_value: 3018 case DW_AT_description: 3019 case DW_AT_endianity: 3020 case DW_AT_is_optional: 3021 case DW_AT_segment: 3022 case DW_AT_variable_parameter: 3023 default: 3024 case DW_AT_abstract_origin: 3025 case DW_AT_sibling: 3026 break; 3027 } 3028 } 3029 } 3030 3031 bool skip = false; 3032 if (skip_artificial && is_artificial) { 3033 // In order to determine if a C++ member function is "const" we 3034 // have to look at the const-ness of "this"... 3035 if (arg_idx == 0 && 3036 DeclKindIsCXXClass(containing_decl_ctx->getDeclKind()) && 3037 // Often times compilers omit the "this" name for the 3038 // specification DIEs, so we can't rely upon the name being in 3039 // the formal parameter DIE... 3040 (name == nullptr || ::strcmp(name, "this") == 0)) { 3041 Type *this_type = 3042 die.ResolveTypeUID(param_type_die_form.Reference()); 3043 if (this_type) { 3044 uint32_t encoding_mask = this_type->GetEncodingMask(); 3045 if (encoding_mask & Type::eEncodingIsPointerUID) { 3046 is_static = false; 3047 3048 if (encoding_mask & (1u << Type::eEncodingIsConstUID)) 3049 type_quals |= clang::Qualifiers::Const; 3050 if (encoding_mask & (1u << Type::eEncodingIsVolatileUID)) 3051 type_quals |= clang::Qualifiers::Volatile; 3052 } 3053 } 3054 } 3055 skip = true; 3056 } 3057 3058 if (!skip) { 3059 Type *type = die.ResolveTypeUID(param_type_die_form.Reference()); 3060 if (type) { 3061 function_param_types.push_back(type->GetForwardCompilerType()); 3062 3063 clang::ParmVarDecl *param_var_decl = 3064 m_ast.CreateParameterDeclaration(containing_decl_ctx, name, 3065 type->GetForwardCompilerType(), 3066 storage); 3067 assert(param_var_decl); 3068 function_param_decls.push_back(param_var_decl); 3069 3070 m_ast.SetMetadataAsUserID(param_var_decl, die.GetID()); 3071 } 3072 } 3073 } 3074 arg_idx++; 3075 } break; 3076 3077 case DW_TAG_unspecified_parameters: 3078 is_variadic = true; 3079 break; 3080 3081 case DW_TAG_template_type_parameter: 3082 case DW_TAG_template_value_parameter: 3083 case DW_TAG_GNU_template_parameter_pack: 3084 // The one caller of this was never using the template_param_infos, and 3085 // the local variable was taking up a large amount of stack space in 3086 // SymbolFileDWARF::ParseType() so this was removed. If we ever need the 3087 // template params back, we can add them back. 3088 // ParseTemplateDIE (dwarf_cu, die, template_param_infos); 3089 has_template_params = true; 3090 break; 3091 3092 default: 3093 break; 3094 } 3095 } 3096 return arg_idx; 3097 } 3098 3099 llvm::Optional<SymbolFile::ArrayInfo> 3100 DWARFASTParser::ParseChildArrayInfo(const DWARFDIE &parent_die, 3101 const ExecutionContext *exe_ctx) { 3102 SymbolFile::ArrayInfo array_info; 3103 if (!parent_die) 3104 return llvm::None; 3105 3106 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 3107 die = die.GetSibling()) { 3108 const dw_tag_t tag = die.Tag(); 3109 switch (tag) { 3110 case DW_TAG_subrange_type: { 3111 DWARFAttributes attributes; 3112 const size_t num_child_attributes = die.GetAttributes(attributes); 3113 if (num_child_attributes > 0) { 3114 uint64_t num_elements = 0; 3115 uint64_t lower_bound = 0; 3116 uint64_t upper_bound = 0; 3117 bool upper_bound_valid = false; 3118 uint32_t i; 3119 for (i = 0; i < num_child_attributes; ++i) { 3120 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3121 DWARFFormValue form_value; 3122 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3123 switch (attr) { 3124 case DW_AT_name: 3125 break; 3126 3127 case DW_AT_count: 3128 if (DWARFDIE var_die = die.GetReferencedDIE(DW_AT_count)) { 3129 if (var_die.Tag() == DW_TAG_variable) 3130 if (exe_ctx) { 3131 if (auto frame = exe_ctx->GetFrameSP()) { 3132 Status error; 3133 lldb::VariableSP var_sp; 3134 auto valobj_sp = frame->GetValueForVariableExpressionPath( 3135 var_die.GetName(), eNoDynamicValues, 0, var_sp, 3136 error); 3137 if (valobj_sp) { 3138 num_elements = valobj_sp->GetValueAsUnsigned(0); 3139 break; 3140 } 3141 } 3142 } 3143 } else 3144 num_elements = form_value.Unsigned(); 3145 break; 3146 3147 case DW_AT_bit_stride: 3148 array_info.bit_stride = form_value.Unsigned(); 3149 break; 3150 3151 case DW_AT_byte_stride: 3152 array_info.byte_stride = form_value.Unsigned(); 3153 break; 3154 3155 case DW_AT_lower_bound: 3156 lower_bound = form_value.Unsigned(); 3157 break; 3158 3159 case DW_AT_upper_bound: 3160 upper_bound_valid = true; 3161 upper_bound = form_value.Unsigned(); 3162 break; 3163 3164 default: 3165 case DW_AT_abstract_origin: 3166 case DW_AT_accessibility: 3167 case DW_AT_allocated: 3168 case DW_AT_associated: 3169 case DW_AT_data_location: 3170 case DW_AT_declaration: 3171 case DW_AT_description: 3172 case DW_AT_sibling: 3173 case DW_AT_threads_scaled: 3174 case DW_AT_type: 3175 case DW_AT_visibility: 3176 break; 3177 } 3178 } 3179 } 3180 3181 if (num_elements == 0) { 3182 if (upper_bound_valid && upper_bound >= lower_bound) 3183 num_elements = upper_bound - lower_bound + 1; 3184 } 3185 3186 array_info.element_orders.push_back(num_elements); 3187 } 3188 } break; 3189 default: 3190 break; 3191 } 3192 } 3193 return array_info; 3194 } 3195 3196 Type *DWARFASTParserClang::GetTypeForDIE(const DWARFDIE &die) { 3197 if (die) { 3198 SymbolFileDWARF *dwarf = die.GetDWARF(); 3199 DWARFAttributes attributes; 3200 const size_t num_attributes = die.GetAttributes(attributes); 3201 if (num_attributes > 0) { 3202 DWARFFormValue type_die_form; 3203 for (size_t i = 0; i < num_attributes; ++i) { 3204 dw_attr_t attr = attributes.AttributeAtIndex(i); 3205 DWARFFormValue form_value; 3206 3207 if (attr == DW_AT_type && 3208 attributes.ExtractFormValueAtIndex(i, form_value)) 3209 return dwarf->ResolveTypeUID(form_value.Reference(), true); 3210 } 3211 } 3212 } 3213 3214 return nullptr; 3215 } 3216 3217 clang::Decl *DWARFASTParserClang::GetClangDeclForDIE(const DWARFDIE &die) { 3218 if (!die) 3219 return nullptr; 3220 3221 switch (die.Tag()) { 3222 case DW_TAG_variable: 3223 case DW_TAG_constant: 3224 case DW_TAG_formal_parameter: 3225 case DW_TAG_imported_declaration: 3226 case DW_TAG_imported_module: 3227 break; 3228 default: 3229 return nullptr; 3230 } 3231 3232 DIEToDeclMap::iterator cache_pos = m_die_to_decl.find(die.GetDIE()); 3233 if (cache_pos != m_die_to_decl.end()) 3234 return cache_pos->second; 3235 3236 if (DWARFDIE spec_die = die.GetReferencedDIE(DW_AT_specification)) { 3237 clang::Decl *decl = GetClangDeclForDIE(spec_die); 3238 m_die_to_decl[die.GetDIE()] = decl; 3239 m_decl_to_die[decl].insert(die.GetDIE()); 3240 return decl; 3241 } 3242 3243 if (DWARFDIE abstract_origin_die = 3244 die.GetReferencedDIE(DW_AT_abstract_origin)) { 3245 clang::Decl *decl = GetClangDeclForDIE(abstract_origin_die); 3246 m_die_to_decl[die.GetDIE()] = decl; 3247 m_decl_to_die[decl].insert(die.GetDIE()); 3248 return decl; 3249 } 3250 3251 clang::Decl *decl = nullptr; 3252 switch (die.Tag()) { 3253 case DW_TAG_variable: 3254 case DW_TAG_constant: 3255 case DW_TAG_formal_parameter: { 3256 SymbolFileDWARF *dwarf = die.GetDWARF(); 3257 Type *type = GetTypeForDIE(die); 3258 if (dwarf && type) { 3259 const char *name = die.GetName(); 3260 clang::DeclContext *decl_context = 3261 TypeSystemClang::DeclContextGetAsDeclContext( 3262 dwarf->GetDeclContextContainingUID(die.GetID())); 3263 decl = m_ast.CreateVariableDeclaration( 3264 decl_context, name, 3265 ClangUtil::GetQualType(type->GetForwardCompilerType())); 3266 } 3267 break; 3268 } 3269 case DW_TAG_imported_declaration: { 3270 SymbolFileDWARF *dwarf = die.GetDWARF(); 3271 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3272 if (imported_uid) { 3273 CompilerDecl imported_decl = SymbolFileDWARF::GetDecl(imported_uid); 3274 if (imported_decl) { 3275 clang::DeclContext *decl_context = 3276 TypeSystemClang::DeclContextGetAsDeclContext( 3277 dwarf->GetDeclContextContainingUID(die.GetID())); 3278 if (clang::NamedDecl *clang_imported_decl = 3279 llvm::dyn_cast<clang::NamedDecl>( 3280 (clang::Decl *)imported_decl.GetOpaqueDecl())) 3281 decl = 3282 m_ast.CreateUsingDeclaration(decl_context, clang_imported_decl); 3283 } 3284 } 3285 break; 3286 } 3287 case DW_TAG_imported_module: { 3288 SymbolFileDWARF *dwarf = die.GetDWARF(); 3289 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3290 3291 if (imported_uid) { 3292 CompilerDeclContext imported_decl_ctx = 3293 SymbolFileDWARF::GetDeclContext(imported_uid); 3294 if (imported_decl_ctx) { 3295 clang::DeclContext *decl_context = 3296 TypeSystemClang::DeclContextGetAsDeclContext( 3297 dwarf->GetDeclContextContainingUID(die.GetID())); 3298 if (clang::NamespaceDecl *ns_decl = 3299 TypeSystemClang::DeclContextGetAsNamespaceDecl( 3300 imported_decl_ctx)) 3301 decl = m_ast.CreateUsingDirectiveDeclaration(decl_context, ns_decl); 3302 } 3303 } 3304 break; 3305 } 3306 default: 3307 break; 3308 } 3309 3310 m_die_to_decl[die.GetDIE()] = decl; 3311 m_decl_to_die[decl].insert(die.GetDIE()); 3312 3313 return decl; 3314 } 3315 3316 clang::DeclContext * 3317 DWARFASTParserClang::GetClangDeclContextForDIE(const DWARFDIE &die) { 3318 if (die) { 3319 clang::DeclContext *decl_ctx = GetCachedClangDeclContextForDIE(die); 3320 if (decl_ctx) 3321 return decl_ctx; 3322 3323 bool try_parsing_type = true; 3324 switch (die.Tag()) { 3325 case DW_TAG_compile_unit: 3326 case DW_TAG_partial_unit: 3327 decl_ctx = m_ast.GetTranslationUnitDecl(); 3328 try_parsing_type = false; 3329 break; 3330 3331 case DW_TAG_namespace: 3332 decl_ctx = ResolveNamespaceDIE(die); 3333 try_parsing_type = false; 3334 break; 3335 3336 case DW_TAG_lexical_block: 3337 decl_ctx = GetDeclContextForBlock(die); 3338 try_parsing_type = false; 3339 break; 3340 3341 default: 3342 break; 3343 } 3344 3345 if (decl_ctx == nullptr && try_parsing_type) { 3346 Type *type = die.GetDWARF()->ResolveType(die); 3347 if (type) 3348 decl_ctx = GetCachedClangDeclContextForDIE(die); 3349 } 3350 3351 if (decl_ctx) { 3352 LinkDeclContextToDIE(decl_ctx, die); 3353 return decl_ctx; 3354 } 3355 } 3356 return nullptr; 3357 } 3358 3359 static bool IsSubroutine(const DWARFDIE &die) { 3360 switch (die.Tag()) { 3361 case DW_TAG_subprogram: 3362 case DW_TAG_inlined_subroutine: 3363 return true; 3364 default: 3365 return false; 3366 } 3367 } 3368 3369 static DWARFDIE GetContainingFunctionWithAbstractOrigin(const DWARFDIE &die) { 3370 for (DWARFDIE candidate = die; candidate; candidate = candidate.GetParent()) { 3371 if (IsSubroutine(candidate)) { 3372 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3373 return candidate; 3374 } else { 3375 return DWARFDIE(); 3376 } 3377 } 3378 } 3379 assert(0 && "Shouldn't call GetContainingFunctionWithAbstractOrigin on " 3380 "something not in a function"); 3381 return DWARFDIE(); 3382 } 3383 3384 static DWARFDIE FindAnyChildWithAbstractOrigin(const DWARFDIE &context) { 3385 for (DWARFDIE candidate = context.GetFirstChild(); candidate.IsValid(); 3386 candidate = candidate.GetSibling()) { 3387 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3388 return candidate; 3389 } 3390 } 3391 return DWARFDIE(); 3392 } 3393 3394 static DWARFDIE FindFirstChildWithAbstractOrigin(const DWARFDIE &block, 3395 const DWARFDIE &function) { 3396 assert(IsSubroutine(function)); 3397 for (DWARFDIE context = block; context != function.GetParent(); 3398 context = context.GetParent()) { 3399 assert(!IsSubroutine(context) || context == function); 3400 if (DWARFDIE child = FindAnyChildWithAbstractOrigin(context)) { 3401 return child; 3402 } 3403 } 3404 return DWARFDIE(); 3405 } 3406 3407 clang::DeclContext * 3408 DWARFASTParserClang::GetDeclContextForBlock(const DWARFDIE &die) { 3409 assert(die.Tag() == DW_TAG_lexical_block); 3410 DWARFDIE containing_function_with_abstract_origin = 3411 GetContainingFunctionWithAbstractOrigin(die); 3412 if (!containing_function_with_abstract_origin) { 3413 return (clang::DeclContext *)ResolveBlockDIE(die); 3414 } 3415 DWARFDIE child = FindFirstChildWithAbstractOrigin( 3416 die, containing_function_with_abstract_origin); 3417 CompilerDeclContext decl_context = 3418 GetDeclContextContainingUIDFromDWARF(child); 3419 return (clang::DeclContext *)decl_context.GetOpaqueDeclContext(); 3420 } 3421 3422 clang::BlockDecl *DWARFASTParserClang::ResolveBlockDIE(const DWARFDIE &die) { 3423 if (die && die.Tag() == DW_TAG_lexical_block) { 3424 clang::BlockDecl *decl = 3425 llvm::cast_or_null<clang::BlockDecl>(m_die_to_decl_ctx[die.GetDIE()]); 3426 3427 if (!decl) { 3428 DWARFDIE decl_context_die; 3429 clang::DeclContext *decl_context = 3430 GetClangDeclContextContainingDIE(die, &decl_context_die); 3431 decl = m_ast.CreateBlockDeclaration(decl_context); 3432 3433 if (decl) 3434 LinkDeclContextToDIE((clang::DeclContext *)decl, die); 3435 } 3436 3437 return decl; 3438 } 3439 return nullptr; 3440 } 3441 3442 clang::NamespaceDecl * 3443 DWARFASTParserClang::ResolveNamespaceDIE(const DWARFDIE &die) { 3444 if (die && die.Tag() == DW_TAG_namespace) { 3445 // See if we already parsed this namespace DIE and associated it with a 3446 // uniqued namespace declaration 3447 clang::NamespaceDecl *namespace_decl = 3448 static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die.GetDIE()]); 3449 if (namespace_decl) 3450 return namespace_decl; 3451 else { 3452 const char *namespace_name = die.GetName(); 3453 clang::DeclContext *containing_decl_ctx = 3454 GetClangDeclContextContainingDIE(die, nullptr); 3455 bool is_inline = 3456 die.GetAttributeValueAsUnsigned(DW_AT_export_symbols, 0) != 0; 3457 3458 namespace_decl = m_ast.GetUniqueNamespaceDeclaration( 3459 namespace_name, containing_decl_ctx, is_inline); 3460 Log *log = 3461 nullptr; // (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 3462 if (log) { 3463 SymbolFileDWARF *dwarf = die.GetDWARF(); 3464 if (namespace_name) { 3465 dwarf->GetObjectFile()->GetModule()->LogMessage( 3466 log, 3467 "ASTContext => %p: 0x%8.8" PRIx64 3468 ": DW_TAG_namespace with DW_AT_name(\"%s\") => " 3469 "clang::NamespaceDecl *%p (original = %p)", 3470 static_cast<void *>(&m_ast.getASTContext()), die.GetID(), 3471 namespace_name, static_cast<void *>(namespace_decl), 3472 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3473 } else { 3474 dwarf->GetObjectFile()->GetModule()->LogMessage( 3475 log, 3476 "ASTContext => %p: 0x%8.8" PRIx64 3477 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p " 3478 "(original = %p)", 3479 static_cast<void *>(&m_ast.getASTContext()), die.GetID(), 3480 static_cast<void *>(namespace_decl), 3481 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3482 } 3483 } 3484 3485 if (namespace_decl) 3486 LinkDeclContextToDIE((clang::DeclContext *)namespace_decl, die); 3487 return namespace_decl; 3488 } 3489 } 3490 return nullptr; 3491 } 3492 3493 clang::DeclContext *DWARFASTParserClang::GetClangDeclContextContainingDIE( 3494 const DWARFDIE &die, DWARFDIE *decl_ctx_die_copy) { 3495 SymbolFileDWARF *dwarf = die.GetDWARF(); 3496 3497 DWARFDIE decl_ctx_die = dwarf->GetDeclContextDIEContainingDIE(die); 3498 3499 if (decl_ctx_die_copy) 3500 *decl_ctx_die_copy = decl_ctx_die; 3501 3502 if (decl_ctx_die) { 3503 clang::DeclContext *clang_decl_ctx = 3504 GetClangDeclContextForDIE(decl_ctx_die); 3505 if (clang_decl_ctx) 3506 return clang_decl_ctx; 3507 } 3508 return m_ast.GetTranslationUnitDecl(); 3509 } 3510 3511 clang::DeclContext * 3512 DWARFASTParserClang::GetCachedClangDeclContextForDIE(const DWARFDIE &die) { 3513 if (die) { 3514 DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find(die.GetDIE()); 3515 if (pos != m_die_to_decl_ctx.end()) 3516 return pos->second; 3517 } 3518 return nullptr; 3519 } 3520 3521 void DWARFASTParserClang::LinkDeclContextToDIE(clang::DeclContext *decl_ctx, 3522 const DWARFDIE &die) { 3523 m_die_to_decl_ctx[die.GetDIE()] = decl_ctx; 3524 // There can be many DIEs for a single decl context 3525 // m_decl_ctx_to_die[decl_ctx].insert(die.GetDIE()); 3526 m_decl_ctx_to_die.insert(std::make_pair(decl_ctx, die)); 3527 } 3528 3529 bool DWARFASTParserClang::CopyUniqueClassMethodTypes( 3530 const DWARFDIE &src_class_die, const DWARFDIE &dst_class_die, 3531 lldb_private::Type *class_type, std::vector<DWARFDIE> &failures) { 3532 if (!class_type || !src_class_die || !dst_class_die) 3533 return false; 3534 if (src_class_die.Tag() != dst_class_die.Tag()) 3535 return false; 3536 3537 // We need to complete the class type so we can get all of the method types 3538 // parsed so we can then unique those types to their equivalent counterparts 3539 // in "dst_cu" and "dst_class_die" 3540 class_type->GetFullCompilerType(); 3541 3542 DWARFDIE src_die; 3543 DWARFDIE dst_die; 3544 UniqueCStringMap<DWARFDIE> src_name_to_die; 3545 UniqueCStringMap<DWARFDIE> dst_name_to_die; 3546 UniqueCStringMap<DWARFDIE> src_name_to_die_artificial; 3547 UniqueCStringMap<DWARFDIE> dst_name_to_die_artificial; 3548 for (src_die = src_class_die.GetFirstChild(); src_die.IsValid(); 3549 src_die = src_die.GetSibling()) { 3550 if (src_die.Tag() == DW_TAG_subprogram) { 3551 // Make sure this is a declaration and not a concrete instance by looking 3552 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3553 // are placed inside the class definitions and shouldn't be included in 3554 // the list of things are are tracking here. 3555 if (src_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 3556 const char *src_name = src_die.GetMangledName(); 3557 if (src_name) { 3558 ConstString src_const_name(src_name); 3559 if (src_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3560 src_name_to_die_artificial.Append(src_const_name, src_die); 3561 else 3562 src_name_to_die.Append(src_const_name, src_die); 3563 } 3564 } 3565 } 3566 } 3567 for (dst_die = dst_class_die.GetFirstChild(); dst_die.IsValid(); 3568 dst_die = dst_die.GetSibling()) { 3569 if (dst_die.Tag() == DW_TAG_subprogram) { 3570 // Make sure this is a declaration and not a concrete instance by looking 3571 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3572 // are placed inside the class definitions and shouldn't be included in 3573 // the list of things are are tracking here. 3574 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 3575 const char *dst_name = dst_die.GetMangledName(); 3576 if (dst_name) { 3577 ConstString dst_const_name(dst_name); 3578 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3579 dst_name_to_die_artificial.Append(dst_const_name, dst_die); 3580 else 3581 dst_name_to_die.Append(dst_const_name, dst_die); 3582 } 3583 } 3584 } 3585 } 3586 const uint32_t src_size = src_name_to_die.GetSize(); 3587 const uint32_t dst_size = dst_name_to_die.GetSize(); 3588 Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | 3589 // DWARF_LOG_TYPE_COMPLETION)); 3590 3591 // Is everything kosher so we can go through the members at top speed? 3592 bool fast_path = true; 3593 3594 if (src_size != dst_size) { 3595 if (src_size != 0 && dst_size != 0) { 3596 LLDB_LOGF(log, 3597 "warning: trying to unique class DIE 0x%8.8x to 0x%8.8x, " 3598 "but they didn't have the same size (src=%d, dst=%d)", 3599 src_class_die.GetOffset(), dst_class_die.GetOffset(), src_size, 3600 dst_size); 3601 } 3602 3603 fast_path = false; 3604 } 3605 3606 uint32_t idx; 3607 3608 if (fast_path) { 3609 for (idx = 0; idx < src_size; ++idx) { 3610 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 3611 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3612 3613 if (src_die.Tag() != dst_die.Tag()) { 3614 LLDB_LOGF(log, 3615 "warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 3616 "but 0x%8.8x (%s) tags didn't match 0x%8.8x (%s)", 3617 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3618 src_die.GetOffset(), src_die.GetTagAsCString(), 3619 dst_die.GetOffset(), dst_die.GetTagAsCString()); 3620 fast_path = false; 3621 } 3622 3623 const char *src_name = src_die.GetMangledName(); 3624 const char *dst_name = dst_die.GetMangledName(); 3625 3626 // Make sure the names match 3627 if (src_name == dst_name || (strcmp(src_name, dst_name) == 0)) 3628 continue; 3629 3630 LLDB_LOGF(log, 3631 "warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 3632 "but 0x%8.8x (%s) names didn't match 0x%8.8x (%s)", 3633 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3634 src_die.GetOffset(), src_name, dst_die.GetOffset(), dst_name); 3635 3636 fast_path = false; 3637 } 3638 } 3639 3640 DWARFASTParserClang *src_dwarf_ast_parser = 3641 (DWARFASTParserClang *)SymbolFileDWARF::GetDWARFParser(*src_die.GetCU()); 3642 DWARFASTParserClang *dst_dwarf_ast_parser = 3643 (DWARFASTParserClang *)SymbolFileDWARF::GetDWARFParser(*dst_die.GetCU()); 3644 3645 // Now do the work of linking the DeclContexts and Types. 3646 if (fast_path) { 3647 // We can do this quickly. Just run across the tables index-for-index 3648 // since we know each node has matching names and tags. 3649 for (idx = 0; idx < src_size; ++idx) { 3650 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 3651 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3652 3653 clang::DeclContext *src_decl_ctx = 3654 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3655 if (src_decl_ctx) { 3656 LLDB_LOGF(log, "uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3657 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 3658 dst_die.GetOffset()); 3659 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 3660 } else { 3661 LLDB_LOGF(log, 3662 "warning: tried to unique decl context from 0x%8.8x for " 3663 "0x%8.8x, but none was found", 3664 src_die.GetOffset(), dst_die.GetOffset()); 3665 } 3666 3667 Type *src_child_type = 3668 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3669 if (src_child_type) { 3670 LLDB_LOGF(log, 3671 "uniquing type %p (uid=0x%" PRIx64 3672 ") from 0x%8.8x for 0x%8.8x", 3673 static_cast<void *>(src_child_type), src_child_type->GetID(), 3674 src_die.GetOffset(), dst_die.GetOffset()); 3675 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 3676 } else { 3677 LLDB_LOGF(log, 3678 "warning: tried to unique lldb_private::Type from " 3679 "0x%8.8x for 0x%8.8x, but none was found", 3680 src_die.GetOffset(), dst_die.GetOffset()); 3681 } 3682 } 3683 } else { 3684 // We must do this slowly. For each member of the destination, look up a 3685 // member in the source with the same name, check its tag, and unique them 3686 // if everything matches up. Report failures. 3687 3688 if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty()) { 3689 src_name_to_die.Sort(); 3690 3691 for (idx = 0; idx < dst_size; ++idx) { 3692 ConstString dst_name = dst_name_to_die.GetCStringAtIndex(idx); 3693 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3694 src_die = src_name_to_die.Find(dst_name, DWARFDIE()); 3695 3696 if (src_die && (src_die.Tag() == dst_die.Tag())) { 3697 clang::DeclContext *src_decl_ctx = 3698 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3699 if (src_decl_ctx) { 3700 LLDB_LOGF(log, "uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3701 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 3702 dst_die.GetOffset()); 3703 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 3704 } else { 3705 LLDB_LOGF(log, 3706 "warning: tried to unique decl context from 0x%8.8x " 3707 "for 0x%8.8x, but none was found", 3708 src_die.GetOffset(), dst_die.GetOffset()); 3709 } 3710 3711 Type *src_child_type = 3712 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3713 if (src_child_type) { 3714 LLDB_LOGF( 3715 log, 3716 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 3717 static_cast<void *>(src_child_type), src_child_type->GetID(), 3718 src_die.GetOffset(), dst_die.GetOffset()); 3719 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = 3720 src_child_type; 3721 } else { 3722 LLDB_LOGF(log, 3723 "warning: tried to unique lldb_private::Type from " 3724 "0x%8.8x for 0x%8.8x, but none was found", 3725 src_die.GetOffset(), dst_die.GetOffset()); 3726 } 3727 } else { 3728 LLDB_LOGF(log, "warning: couldn't find a match for 0x%8.8x", 3729 dst_die.GetOffset()); 3730 3731 failures.push_back(dst_die); 3732 } 3733 } 3734 } 3735 } 3736 3737 const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize(); 3738 const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize(); 3739 3740 if (src_size_artificial && dst_size_artificial) { 3741 dst_name_to_die_artificial.Sort(); 3742 3743 for (idx = 0; idx < src_size_artificial; ++idx) { 3744 ConstString src_name_artificial = 3745 src_name_to_die_artificial.GetCStringAtIndex(idx); 3746 src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 3747 dst_die = 3748 dst_name_to_die_artificial.Find(src_name_artificial, DWARFDIE()); 3749 3750 if (dst_die) { 3751 // Both classes have the artificial types, link them 3752 clang::DeclContext *src_decl_ctx = 3753 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3754 if (src_decl_ctx) { 3755 LLDB_LOGF(log, "uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3756 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 3757 dst_die.GetOffset()); 3758 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 3759 } else { 3760 LLDB_LOGF(log, 3761 "warning: tried to unique decl context from 0x%8.8x " 3762 "for 0x%8.8x, but none was found", 3763 src_die.GetOffset(), dst_die.GetOffset()); 3764 } 3765 3766 Type *src_child_type = 3767 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3768 if (src_child_type) { 3769 LLDB_LOGF( 3770 log, 3771 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 3772 static_cast<void *>(src_child_type), src_child_type->GetID(), 3773 src_die.GetOffset(), dst_die.GetOffset()); 3774 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 3775 } else { 3776 LLDB_LOGF(log, 3777 "warning: tried to unique lldb_private::Type from " 3778 "0x%8.8x for 0x%8.8x, but none was found", 3779 src_die.GetOffset(), dst_die.GetOffset()); 3780 } 3781 } 3782 } 3783 } 3784 3785 if (dst_size_artificial) { 3786 for (idx = 0; idx < dst_size_artificial; ++idx) { 3787 ConstString dst_name_artificial = 3788 dst_name_to_die_artificial.GetCStringAtIndex(idx); 3789 dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 3790 LLDB_LOGF(log, 3791 "warning: need to create artificial method for 0x%8.8x for " 3792 "method '%s'", 3793 dst_die.GetOffset(), dst_name_artificial.GetCString()); 3794 3795 failures.push_back(dst_die); 3796 } 3797 } 3798 3799 return !failures.empty(); 3800 } 3801