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 "llvm/Demangle/Demangle.h" 39 40 #include "clang/AST/CXXInheritance.h" 41 #include "clang/AST/DeclCXX.h" 42 #include "clang/AST/DeclObjC.h" 43 #include "clang/AST/DeclTemplate.h" 44 45 #include <map> 46 #include <memory> 47 #include <vector> 48 49 //#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN 50 51 #ifdef ENABLE_DEBUG_PRINTF 52 #include <stdio.h> 53 #define DEBUG_PRINTF(fmt, ...) printf(fmt, __VA_ARGS__) 54 #else 55 #define DEBUG_PRINTF(fmt, ...) 56 #endif 57 58 using namespace lldb; 59 using namespace lldb_private; 60 DWARFASTParserClang::DWARFASTParserClang(TypeSystemClang &ast) 61 : m_ast(ast), m_die_to_decl_ctx(), m_decl_ctx_to_die() {} 62 63 DWARFASTParserClang::~DWARFASTParserClang() {} 64 65 static AccessType DW_ACCESS_to_AccessType(uint32_t dwarf_accessibility) { 66 switch (dwarf_accessibility) { 67 case DW_ACCESS_public: 68 return eAccessPublic; 69 case DW_ACCESS_private: 70 return eAccessPrivate; 71 case DW_ACCESS_protected: 72 return eAccessProtected; 73 default: 74 break; 75 } 76 return eAccessNone; 77 } 78 79 static bool DeclKindIsCXXClass(clang::Decl::Kind decl_kind) { 80 switch (decl_kind) { 81 case clang::Decl::CXXRecord: 82 case clang::Decl::ClassTemplateSpecialization: 83 return true; 84 default: 85 break; 86 } 87 return false; 88 } 89 90 91 ClangASTImporter &DWARFASTParserClang::GetClangASTImporter() { 92 if (!m_clang_ast_importer_up) { 93 m_clang_ast_importer_up.reset(new ClangASTImporter); 94 } 95 return *m_clang_ast_importer_up; 96 } 97 98 /// Detect a forward declaration that is nested in a DW_TAG_module. 99 static bool IsClangModuleFwdDecl(const DWARFDIE &Die) { 100 if (!Die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0)) 101 return false; 102 auto Parent = Die.GetParent(); 103 while (Parent.IsValid()) { 104 if (Parent.Tag() == DW_TAG_module) 105 return true; 106 Parent = Parent.GetParent(); 107 } 108 return false; 109 } 110 111 static DWARFDIE GetContainingClangModuleDIE(const DWARFDIE &die) { 112 if (die.IsValid()) { 113 DWARFDIE top_module_die; 114 // Now make sure this DIE is scoped in a DW_TAG_module tag and return true 115 // if so 116 for (DWARFDIE parent = die.GetParent(); parent.IsValid(); 117 parent = parent.GetParent()) { 118 const dw_tag_t tag = parent.Tag(); 119 if (tag == DW_TAG_module) 120 top_module_die = parent; 121 else if (tag == DW_TAG_compile_unit || tag == DW_TAG_partial_unit) 122 break; 123 } 124 125 return top_module_die; 126 } 127 return DWARFDIE(); 128 } 129 130 static lldb::ModuleSP GetContainingClangModule(const DWARFDIE &die) { 131 if (die.IsValid()) { 132 DWARFDIE clang_module_die = GetContainingClangModuleDIE(die); 133 134 if (clang_module_die) { 135 const char *module_name = clang_module_die.GetName(); 136 if (module_name) 137 return die.GetDWARF()->GetExternalModule( 138 lldb_private::ConstString(module_name)); 139 } 140 } 141 return lldb::ModuleSP(); 142 } 143 144 TypeSP DWARFASTParserClang::ParseTypeFromClangModule(const SymbolContext &sc, 145 const DWARFDIE &die, 146 Log *log) { 147 ModuleSP clang_module_sp = GetContainingClangModule(die); 148 if (!clang_module_sp) 149 return TypeSP(); 150 151 // If this type comes from a Clang module, recursively look in the 152 // DWARF section of the .pcm file in the module cache. Clang 153 // generates DWO skeleton units as breadcrumbs to find them. 154 llvm::SmallVector<CompilerContext, 4> decl_context; 155 die.GetDeclContext(decl_context); 156 TypeMap pcm_types; 157 158 // The type in the Clang module must have the same language as the current CU. 159 LanguageSet languages; 160 languages.Insert(SymbolFileDWARF::GetLanguage(*die.GetCU())); 161 llvm::DenseSet<SymbolFile *> searched_symbol_files; 162 clang_module_sp->GetSymbolFile()->FindTypes(decl_context, languages, 163 searched_symbol_files, pcm_types); 164 if (pcm_types.Empty()) { 165 // Since this type is defined in one of the Clang modules imported 166 // by this symbol file, search all of them. Instead of calling 167 // sym_file->FindTypes(), which would return this again, go straight 168 // to the imported modules. 169 auto &sym_file = die.GetCU()->GetSymbolFileDWARF(); 170 171 // Well-formed clang modules never form cycles; guard against corrupted 172 // ones by inserting the current file. 173 searched_symbol_files.insert(&sym_file); 174 sym_file.ForEachExternalModule( 175 *sc.comp_unit, searched_symbol_files, [&](Module &module) { 176 module.GetSymbolFile()->FindTypes(decl_context, languages, 177 searched_symbol_files, pcm_types); 178 return pcm_types.GetSize(); 179 }); 180 } 181 182 if (!pcm_types.GetSize()) 183 return TypeSP(); 184 185 // We found a real definition for this type in the Clang module, so lets use 186 // it and cache the fact that we found a complete type for this die. 187 TypeSP pcm_type_sp = pcm_types.GetTypeAtIndex(0); 188 if (!pcm_type_sp) 189 return TypeSP(); 190 191 lldb_private::CompilerType pcm_type = pcm_type_sp->GetForwardCompilerType(); 192 lldb_private::CompilerType type = 193 GetClangASTImporter().CopyType(m_ast, pcm_type); 194 195 if (!type) 196 return TypeSP(); 197 198 // Under normal operation pcm_type is a shallow forward declaration 199 // that gets completed later. This is necessary to support cyclic 200 // data structures. If, however, pcm_type is already complete (for 201 // example, because it was loaded for a different target before), 202 // the definition needs to be imported right away, too. 203 // Type::ResolveClangType() effectively ignores the ResolveState 204 // inside type_sp and only looks at IsDefined(), so it never calls 205 // ClangASTImporter::ASTImporterDelegate::ImportDefinitionTo(), 206 // which does extra work for Objective-C classes. This would result 207 // in only the forward declaration to be visible. 208 if (pcm_type.IsDefined()) 209 GetClangASTImporter().RequireCompleteType(ClangUtil::GetQualType(type)); 210 211 SymbolFileDWARF *dwarf = die.GetDWARF(); 212 TypeSP type_sp(new Type( 213 die.GetID(), dwarf, pcm_type_sp->GetName(), pcm_type_sp->GetByteSize(), 214 nullptr, LLDB_INVALID_UID, Type::eEncodingInvalid, 215 &pcm_type_sp->GetDeclaration(), type, Type::ResolveState::Forward, 216 TypePayloadClang(GetOwningClangModule(die)))); 217 218 dwarf->GetTypeList().Insert(type_sp); 219 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 220 clang::TagDecl *tag_decl = TypeSystemClang::GetAsTagDecl(type); 221 if (tag_decl) { 222 LinkDeclContextToDIE(tag_decl, die); 223 } else { 224 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE(die); 225 if (defn_decl_ctx) 226 LinkDeclContextToDIE(defn_decl_ctx, die); 227 } 228 229 return type_sp; 230 } 231 232 static void CompleteExternalTagDeclType(TypeSystemClang &ast, 233 ClangASTImporter &ast_importer, 234 clang::DeclContext *decl_ctx, 235 DWARFDIE die, 236 const char *type_name_cstr) { 237 auto *tag_decl_ctx = clang::dyn_cast<clang::TagDecl>(decl_ctx); 238 if (!tag_decl_ctx) 239 return; 240 241 // If this type was not imported from an external AST, there's nothing to do. 242 CompilerType type = ast.GetTypeForDecl(tag_decl_ctx); 243 if (!type || !ast_importer.CanImport(type)) 244 return; 245 246 auto qual_type = ClangUtil::GetQualType(type); 247 if (!ast_importer.RequireCompleteType(qual_type)) { 248 die.GetDWARF()->GetObjectFile()->GetModule()->ReportError( 249 "Unable to complete the Decl context for DIE '%s' at offset " 250 "0x%8.8x.\nPlease file a bug report.", 251 type_name_cstr ? type_name_cstr : "", die.GetOffset()); 252 // We need to make the type look complete otherwise, we might crash in 253 // Clang when adding children. 254 if (TypeSystemClang::StartTagDeclarationDefinition(type)) 255 TypeSystemClang::CompleteTagDeclarationDefinition(type); 256 } 257 } 258 259 ParsedDWARFTypeAttributes::ParsedDWARFTypeAttributes(const DWARFDIE &die) { 260 DWARFAttributes attributes; 261 size_t num_attributes = die.GetAttributes(attributes); 262 for (size_t i = 0; i < num_attributes; ++i) { 263 dw_attr_t attr = attributes.AttributeAtIndex(i); 264 DWARFFormValue form_value; 265 if (!attributes.ExtractFormValueAtIndex(i, form_value)) 266 continue; 267 switch (attr) { 268 case DW_AT_abstract_origin: 269 abstract_origin = form_value; 270 break; 271 272 case DW_AT_accessibility: 273 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 274 break; 275 276 case DW_AT_artificial: 277 is_artificial = form_value.Boolean(); 278 break; 279 280 case DW_AT_bit_stride: 281 bit_stride = form_value.Unsigned(); 282 break; 283 284 case DW_AT_byte_size: 285 byte_size = form_value.Unsigned(); 286 break; 287 288 case DW_AT_byte_stride: 289 byte_stride = form_value.Unsigned(); 290 break; 291 292 case DW_AT_calling_convention: 293 calling_convention = form_value.Unsigned(); 294 break; 295 296 case DW_AT_containing_type: 297 containing_type = form_value; 298 break; 299 300 case DW_AT_decl_file: 301 decl.SetFile(die.GetCU()->GetFile(form_value.Unsigned())); 302 break; 303 case DW_AT_decl_line: 304 decl.SetLine(form_value.Unsigned()); 305 break; 306 case DW_AT_decl_column: 307 decl.SetColumn(form_value.Unsigned()); 308 break; 309 310 case DW_AT_declaration: 311 is_forward_declaration = form_value.Boolean(); 312 break; 313 314 case DW_AT_encoding: 315 encoding = form_value.Unsigned(); 316 break; 317 318 case DW_AT_enum_class: 319 is_scoped_enum = form_value.Boolean(); 320 break; 321 322 case DW_AT_explicit: 323 is_explicit = form_value.Boolean(); 324 break; 325 326 case DW_AT_external: 327 if (form_value.Unsigned()) 328 storage = clang::SC_Extern; 329 break; 330 331 case DW_AT_inline: 332 is_inline = form_value.Boolean(); 333 break; 334 335 case DW_AT_linkage_name: 336 case DW_AT_MIPS_linkage_name: 337 mangled_name = form_value.AsCString(); 338 break; 339 340 case DW_AT_name: 341 name.SetCString(form_value.AsCString()); 342 break; 343 344 case DW_AT_object_pointer: 345 object_pointer = form_value.Reference(); 346 break; 347 348 case DW_AT_signature: 349 signature = form_value; 350 break; 351 352 case DW_AT_specification: 353 specification = form_value; 354 break; 355 356 case DW_AT_type: 357 type = form_value; 358 break; 359 360 case DW_AT_virtuality: 361 is_virtual = form_value.Boolean(); 362 break; 363 364 case DW_AT_APPLE_objc_complete_type: 365 is_complete_objc_class = form_value.Signed(); 366 break; 367 368 case DW_AT_APPLE_objc_direct: 369 is_objc_direct_call = true; 370 break; 371 372 case DW_AT_APPLE_runtime_class: 373 class_language = (LanguageType)form_value.Signed(); 374 break; 375 376 case DW_AT_GNU_vector: 377 is_vector = form_value.Boolean(); 378 break; 379 case DW_AT_export_symbols: 380 exports_symbols = form_value.Boolean(); 381 break; 382 } 383 } 384 } 385 386 static std::string GetUnitName(const DWARFDIE &die) { 387 if (DWARFUnit *unit = die.GetCU()) 388 return unit->GetAbsolutePath().GetPath(); 389 return "<missing DWARF unit path>"; 390 } 391 392 TypeSP DWARFASTParserClang::ParseTypeFromDWARF(const SymbolContext &sc, 393 const DWARFDIE &die, 394 bool *type_is_new_ptr) { 395 if (type_is_new_ptr) 396 *type_is_new_ptr = false; 397 398 if (!die) 399 return nullptr; 400 401 Log *log(LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION | 402 DWARF_LOG_LOOKUPS)); 403 404 SymbolFileDWARF *dwarf = die.GetDWARF(); 405 if (log) { 406 DWARFDIE context_die; 407 clang::DeclContext *context = 408 GetClangDeclContextContainingDIE(die, &context_die); 409 410 dwarf->GetObjectFile()->GetModule()->LogMessage( 411 log, 412 "DWARFASTParserClang::ParseTypeFromDWARF " 413 "(die = 0x%8.8x, decl_ctx = %p (die 0x%8.8x)) %s name = '%s')", 414 die.GetOffset(), static_cast<void *>(context), context_die.GetOffset(), 415 die.GetTagAsCString(), die.GetName()); 416 } 417 418 Type *type_ptr = dwarf->GetDIEToType().lookup(die.GetDIE()); 419 if (type_ptr == DIE_IS_BEING_PARSED) 420 return nullptr; 421 if (type_ptr) 422 return type_ptr->shared_from_this(); 423 // Set a bit that lets us know that we are currently parsing this 424 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 425 426 ParsedDWARFTypeAttributes attrs(die); 427 428 if (DWARFDIE signature_die = attrs.signature.Reference()) { 429 if (TypeSP type_sp = 430 ParseTypeFromDWARF(sc, signature_die, type_is_new_ptr)) { 431 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 432 if (clang::DeclContext *decl_ctx = 433 GetCachedClangDeclContextForDIE(signature_die)) 434 LinkDeclContextToDIE(decl_ctx, die); 435 return type_sp; 436 } 437 return nullptr; 438 } 439 440 if (type_is_new_ptr) 441 *type_is_new_ptr = true; 442 443 const dw_tag_t tag = die.Tag(); 444 445 TypeSP type_sp; 446 447 switch (tag) { 448 case DW_TAG_typedef: 449 case DW_TAG_base_type: 450 case DW_TAG_pointer_type: 451 case DW_TAG_reference_type: 452 case DW_TAG_rvalue_reference_type: 453 case DW_TAG_const_type: 454 case DW_TAG_restrict_type: 455 case DW_TAG_volatile_type: 456 case DW_TAG_atomic_type: 457 case DW_TAG_unspecified_type: { 458 type_sp = ParseTypeModifier(sc, die, attrs); 459 break; 460 } 461 462 case DW_TAG_structure_type: 463 case DW_TAG_union_type: 464 case DW_TAG_class_type: { 465 type_sp = ParseStructureLikeDIE(sc, die, attrs); 466 break; 467 } 468 469 case DW_TAG_enumeration_type: { 470 type_sp = ParseEnum(sc, die, attrs); 471 break; 472 } 473 474 case DW_TAG_inlined_subroutine: 475 case DW_TAG_subprogram: 476 case DW_TAG_subroutine_type: { 477 type_sp = ParseSubroutine(die, attrs); 478 break; 479 } 480 case DW_TAG_array_type: { 481 type_sp = ParseArrayType(die, attrs); 482 break; 483 } 484 case DW_TAG_ptr_to_member_type: { 485 type_sp = ParsePointerToMemberType(die, attrs); 486 break; 487 } 488 default: 489 dwarf->GetObjectFile()->GetModule()->ReportError( 490 "{0x%8.8x}: unhandled type tag 0x%4.4x (%s), please file a bug and " 491 "attach the file at the start of this error message", 492 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 493 break; 494 } 495 496 // TODO: We should consider making the switch above exhaustive to simplify 497 // control flow in ParseTypeFromDWARF. Then, we could simply replace this 498 // return statement with a call to llvm_unreachable. 499 return UpdateSymbolContextScopeForType(sc, die, type_sp); 500 } 501 502 lldb::TypeSP 503 DWARFASTParserClang::ParseTypeModifier(const SymbolContext &sc, 504 const DWARFDIE &die, 505 ParsedDWARFTypeAttributes &attrs) { 506 Log *log(LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION | 507 DWARF_LOG_LOOKUPS)); 508 SymbolFileDWARF *dwarf = die.GetDWARF(); 509 const dw_tag_t tag = die.Tag(); 510 LanguageType cu_language = SymbolFileDWARF::GetLanguage(*die.GetCU()); 511 Type::ResolveState resolve_state = Type::ResolveState::Unresolved; 512 Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID; 513 TypeSP type_sp; 514 CompilerType clang_type; 515 516 if (tag == DW_TAG_typedef && attrs.type.IsValid()) { 517 // Try to parse a typedef from the (DWARF embedded in the) Clang 518 // module file first as modules can contain typedef'ed 519 // structures that have no names like: 520 // 521 // typedef struct { int a; } Foo; 522 // 523 // In this case we will have a structure with no name and a 524 // typedef named "Foo" that points to this unnamed 525 // structure. The name in the typedef is the only identifier for 526 // the struct, so always try to get typedefs from Clang modules 527 // if possible. 528 // 529 // The type_sp returned will be empty if the typedef doesn't 530 // exist in a module file, so it is cheap to call this function 531 // just to check. 532 // 533 // If we don't do this we end up creating a TypeSP that says 534 // this is a typedef to type 0x123 (the DW_AT_type value would 535 // be 0x123 in the DW_TAG_typedef), and this is the unnamed 536 // structure type. We will have a hard time tracking down an 537 // unnammed structure type in the module debug info, so we make 538 // sure we don't get into this situation by always resolving 539 // typedefs from the module. 540 const DWARFDIE encoding_die = attrs.type.Reference(); 541 542 // First make sure that the die that this is typedef'ed to _is_ 543 // just a declaration (DW_AT_declaration == 1), not a full 544 // definition since template types can't be represented in 545 // modules since only concrete instances of templates are ever 546 // emitted and modules won't contain those 547 if (encoding_die && 548 encoding_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 549 type_sp = ParseTypeFromClangModule(sc, die, log); 550 if (type_sp) 551 return type_sp; 552 } 553 } 554 555 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\") type => 0x%8.8lx\n", die.GetID(), 556 DW_TAG_value_to_name(tag), type_name_cstr, 557 encoding_uid.Reference()); 558 559 switch (tag) { 560 default: 561 break; 562 563 case DW_TAG_unspecified_type: 564 if (attrs.name == "nullptr_t" || attrs.name == "decltype(nullptr)") { 565 resolve_state = Type::ResolveState::Full; 566 clang_type = m_ast.GetBasicType(eBasicTypeNullPtr); 567 break; 568 } 569 // Fall through to base type below in case we can handle the type 570 // there... 571 LLVM_FALLTHROUGH; 572 573 case DW_TAG_base_type: 574 resolve_state = Type::ResolveState::Full; 575 clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize( 576 attrs.name.GetStringRef(), attrs.encoding, 577 attrs.byte_size.getValueOr(0) * 8); 578 break; 579 580 case DW_TAG_pointer_type: 581 encoding_data_type = Type::eEncodingIsPointerUID; 582 break; 583 case DW_TAG_reference_type: 584 encoding_data_type = Type::eEncodingIsLValueReferenceUID; 585 break; 586 case DW_TAG_rvalue_reference_type: 587 encoding_data_type = Type::eEncodingIsRValueReferenceUID; 588 break; 589 case DW_TAG_typedef: 590 encoding_data_type = Type::eEncodingIsTypedefUID; 591 break; 592 case DW_TAG_const_type: 593 encoding_data_type = Type::eEncodingIsConstUID; 594 break; 595 case DW_TAG_restrict_type: 596 encoding_data_type = Type::eEncodingIsRestrictUID; 597 break; 598 case DW_TAG_volatile_type: 599 encoding_data_type = Type::eEncodingIsVolatileUID; 600 break; 601 case DW_TAG_atomic_type: 602 encoding_data_type = Type::eEncodingIsAtomicUID; 603 break; 604 } 605 606 if (!clang_type && (encoding_data_type == Type::eEncodingIsPointerUID || 607 encoding_data_type == Type::eEncodingIsTypedefUID)) { 608 if (tag == DW_TAG_pointer_type) { 609 DWARFDIE target_die = die.GetReferencedDIE(DW_AT_type); 610 611 if (target_die.GetAttributeValueAsUnsigned(DW_AT_APPLE_block, 0)) { 612 // Blocks have a __FuncPtr inside them which is a pointer to a 613 // function of the proper type. 614 615 for (DWARFDIE child_die = target_die.GetFirstChild(); 616 child_die.IsValid(); child_die = child_die.GetSibling()) { 617 if (!strcmp(child_die.GetAttributeValueAsString(DW_AT_name, ""), 618 "__FuncPtr")) { 619 DWARFDIE function_pointer_type = 620 child_die.GetReferencedDIE(DW_AT_type); 621 622 if (function_pointer_type) { 623 DWARFDIE function_type = 624 function_pointer_type.GetReferencedDIE(DW_AT_type); 625 626 bool function_type_is_new_pointer; 627 TypeSP lldb_function_type_sp = ParseTypeFromDWARF( 628 sc, function_type, &function_type_is_new_pointer); 629 630 if (lldb_function_type_sp) { 631 clang_type = m_ast.CreateBlockPointerType( 632 lldb_function_type_sp->GetForwardCompilerType()); 633 encoding_data_type = Type::eEncodingIsUID; 634 attrs.type.Clear(); 635 resolve_state = Type::ResolveState::Full; 636 } 637 } 638 639 break; 640 } 641 } 642 } 643 } 644 645 if (cu_language == eLanguageTypeObjC || 646 cu_language == eLanguageTypeObjC_plus_plus) { 647 if (attrs.name) { 648 if (attrs.name == "id") { 649 if (log) 650 dwarf->GetObjectFile()->GetModule()->LogMessage( 651 log, 652 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 653 "is Objective-C 'id' built-in type.", 654 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 655 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 656 encoding_data_type = Type::eEncodingIsUID; 657 attrs.type.Clear(); 658 resolve_state = Type::ResolveState::Full; 659 } else if (attrs.name == "Class") { 660 if (log) 661 dwarf->GetObjectFile()->GetModule()->LogMessage( 662 log, 663 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 664 "is Objective-C 'Class' built-in type.", 665 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 666 clang_type = m_ast.GetBasicType(eBasicTypeObjCClass); 667 encoding_data_type = Type::eEncodingIsUID; 668 attrs.type.Clear(); 669 resolve_state = Type::ResolveState::Full; 670 } else if (attrs.name == "SEL") { 671 if (log) 672 dwarf->GetObjectFile()->GetModule()->LogMessage( 673 log, 674 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 675 "is Objective-C 'selector' built-in type.", 676 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 677 clang_type = m_ast.GetBasicType(eBasicTypeObjCSel); 678 encoding_data_type = Type::eEncodingIsUID; 679 attrs.type.Clear(); 680 resolve_state = Type::ResolveState::Full; 681 } 682 } else if (encoding_data_type == Type::eEncodingIsPointerUID && 683 attrs.type.IsValid()) { 684 // Clang sometimes erroneously emits id as objc_object*. In that 685 // case we fix up the type to "id". 686 687 const DWARFDIE encoding_die = attrs.type.Reference(); 688 689 if (encoding_die && encoding_die.Tag() == DW_TAG_structure_type) { 690 llvm::StringRef struct_name = encoding_die.GetName(); 691 if (struct_name == "objc_object") { 692 if (log) 693 dwarf->GetObjectFile()->GetModule()->LogMessage( 694 log, 695 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s " 696 "'%s' is 'objc_object*', which we overrode to " 697 "'id'.", 698 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 699 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 700 encoding_data_type = Type::eEncodingIsUID; 701 attrs.type.Clear(); 702 resolve_state = Type::ResolveState::Full; 703 } 704 } 705 } 706 } 707 } 708 709 type_sp = std::make_shared<Type>( 710 die.GetID(), dwarf, attrs.name, attrs.byte_size, nullptr, 711 dwarf->GetUID(attrs.type.Reference()), encoding_data_type, &attrs.decl, 712 clang_type, resolve_state, TypePayloadClang(GetOwningClangModule(die))); 713 714 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 715 return type_sp; 716 } 717 718 TypeSP DWARFASTParserClang::ParseEnum(const SymbolContext &sc, 719 const DWARFDIE &die, 720 ParsedDWARFTypeAttributes &attrs) { 721 Log *log(LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION | 722 DWARF_LOG_LOOKUPS)); 723 SymbolFileDWARF *dwarf = die.GetDWARF(); 724 const dw_tag_t tag = die.Tag(); 725 TypeSP type_sp; 726 727 if (attrs.is_forward_declaration) { 728 type_sp = ParseTypeFromClangModule(sc, die, log); 729 if (type_sp) 730 return type_sp; 731 732 DWARFDeclContext die_decl_ctx = SymbolFileDWARF::GetDWARFDeclContext(die); 733 734 type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx); 735 736 if (!type_sp) { 737 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 738 if (debug_map_symfile) { 739 // We weren't able to find a full declaration in this DWARF, 740 // see if we have a declaration anywhere else... 741 type_sp = debug_map_symfile->FindDefinitionTypeForDWARFDeclContext( 742 die_decl_ctx); 743 } 744 } 745 746 if (type_sp) { 747 if (log) { 748 dwarf->GetObjectFile()->GetModule()->LogMessage( 749 log, 750 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 751 "forward declaration, complete type is 0x%8.8" PRIx64, 752 static_cast<void *>(this), die.GetOffset(), 753 DW_TAG_value_to_name(tag), attrs.name.GetCString(), 754 type_sp->GetID()); 755 } 756 757 // We found a real definition for this type elsewhere so lets use 758 // it and cache the fact that we found a complete type for this 759 // die 760 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 761 clang::DeclContext *defn_decl_ctx = 762 GetCachedClangDeclContextForDIE(dwarf->GetDIE(type_sp->GetID())); 763 if (defn_decl_ctx) 764 LinkDeclContextToDIE(defn_decl_ctx, die); 765 return type_sp; 766 } 767 } 768 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 769 DW_TAG_value_to_name(tag), type_name_cstr); 770 771 CompilerType enumerator_clang_type; 772 CompilerType clang_type; 773 clang_type.SetCompilerType( 774 &m_ast, dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE())); 775 if (!clang_type) { 776 if (attrs.type.IsValid()) { 777 Type *enumerator_type = 778 dwarf->ResolveTypeUID(attrs.type.Reference(), true); 779 if (enumerator_type) 780 enumerator_clang_type = enumerator_type->GetFullCompilerType(); 781 } 782 783 if (!enumerator_clang_type) { 784 if (attrs.byte_size) { 785 enumerator_clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize( 786 "", DW_ATE_signed, *attrs.byte_size * 8); 787 } else { 788 enumerator_clang_type = m_ast.GetBasicType(eBasicTypeInt); 789 } 790 } 791 792 clang_type = m_ast.CreateEnumerationType( 793 attrs.name.GetCString(), GetClangDeclContextContainingDIE(die, nullptr), 794 GetOwningClangModule(die), attrs.decl, enumerator_clang_type, 795 attrs.is_scoped_enum); 796 } else { 797 enumerator_clang_type = m_ast.GetEnumerationIntegerType(clang_type); 798 } 799 800 LinkDeclContextToDIE(TypeSystemClang::GetDeclContextForType(clang_type), die); 801 802 type_sp = std::make_shared<Type>( 803 die.GetID(), dwarf, attrs.name, attrs.byte_size, nullptr, 804 dwarf->GetUID(attrs.type.Reference()), Type::eEncodingIsUID, &attrs.decl, 805 clang_type, Type::ResolveState::Forward, 806 TypePayloadClang(GetOwningClangModule(die))); 807 808 if (TypeSystemClang::StartTagDeclarationDefinition(clang_type)) { 809 if (die.HasChildren()) { 810 bool is_signed = false; 811 enumerator_clang_type.IsIntegerType(is_signed); 812 ParseChildEnumerators(clang_type, is_signed, 813 type_sp->GetByteSize().getValueOr(0), die); 814 } 815 TypeSystemClang::CompleteTagDeclarationDefinition(clang_type); 816 } else { 817 dwarf->GetObjectFile()->GetModule()->ReportError( 818 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 819 "definition.\nPlease file a bug and attach the file at the " 820 "start of this error message", 821 die.GetOffset(), attrs.name.GetCString()); 822 } 823 return type_sp; 824 } 825 826 TypeSP DWARFASTParserClang::ParseSubroutine(const DWARFDIE &die, 827 ParsedDWARFTypeAttributes &attrs) { 828 Log *log(LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION | 829 DWARF_LOG_LOOKUPS)); 830 831 SymbolFileDWARF *dwarf = die.GetDWARF(); 832 const dw_tag_t tag = die.Tag(); 833 834 bool is_variadic = false; 835 bool is_static = false; 836 bool has_template_params = false; 837 838 unsigned type_quals = 0; 839 840 std::string object_pointer_name; 841 if (attrs.object_pointer) { 842 const char *object_pointer_name_cstr = attrs.object_pointer.GetName(); 843 if (object_pointer_name_cstr) 844 object_pointer_name = object_pointer_name_cstr; 845 } 846 847 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 848 DW_TAG_value_to_name(tag), type_name_cstr); 849 850 CompilerType return_clang_type; 851 Type *func_type = NULL; 852 853 if (attrs.type.IsValid()) 854 func_type = dwarf->ResolveTypeUID(attrs.type.Reference(), true); 855 856 if (func_type) 857 return_clang_type = func_type->GetForwardCompilerType(); 858 else 859 return_clang_type = m_ast.GetBasicType(eBasicTypeVoid); 860 861 std::vector<CompilerType> function_param_types; 862 std::vector<clang::ParmVarDecl *> function_param_decls; 863 864 // Parse the function children for the parameters 865 866 DWARFDIE decl_ctx_die; 867 clang::DeclContext *containing_decl_ctx = 868 GetClangDeclContextContainingDIE(die, &decl_ctx_die); 869 const clang::Decl::Kind containing_decl_kind = 870 containing_decl_ctx->getDeclKind(); 871 872 bool is_cxx_method = DeclKindIsCXXClass(containing_decl_kind); 873 // Start off static. This will be set to false in 874 // ParseChildParameters(...) if we find a "this" parameters as the 875 // first parameter 876 if (is_cxx_method) { 877 is_static = true; 878 } 879 880 if (die.HasChildren()) { 881 bool skip_artificial = true; 882 ParseChildParameters(containing_decl_ctx, die, skip_artificial, is_static, 883 is_variadic, has_template_params, 884 function_param_types, function_param_decls, 885 type_quals); 886 } 887 888 bool ignore_containing_context = false; 889 // Check for templatized class member functions. If we had any 890 // DW_TAG_template_type_parameter or DW_TAG_template_value_parameter 891 // the DW_TAG_subprogram DIE, then we can't let this become a method in 892 // a class. Why? Because templatized functions are only emitted if one 893 // of the templatized methods is used in the current compile unit and 894 // we will end up with classes that may or may not include these member 895 // functions and this means one class won't match another class 896 // definition and it affects our ability to use a class in the clang 897 // expression parser. So for the greater good, we currently must not 898 // allow any template member functions in a class definition. 899 if (is_cxx_method && has_template_params) { 900 ignore_containing_context = true; 901 is_cxx_method = false; 902 } 903 904 // clang_type will get the function prototype clang type after this 905 // call 906 CompilerType clang_type = m_ast.CreateFunctionType( 907 return_clang_type, function_param_types.data(), 908 function_param_types.size(), is_variadic, type_quals); 909 910 if (attrs.name) { 911 bool type_handled = false; 912 if (tag == DW_TAG_subprogram || tag == DW_TAG_inlined_subroutine) { 913 ObjCLanguage::MethodName objc_method(attrs.name.GetStringRef(), true); 914 if (objc_method.IsValid(true)) { 915 CompilerType class_opaque_type; 916 ConstString class_name(objc_method.GetClassName()); 917 if (class_name) { 918 TypeSP complete_objc_class_type_sp( 919 dwarf->FindCompleteObjCDefinitionTypeForDIE(DWARFDIE(), 920 class_name, false)); 921 922 if (complete_objc_class_type_sp) { 923 CompilerType type_clang_forward_type = 924 complete_objc_class_type_sp->GetForwardCompilerType(); 925 if (TypeSystemClang::IsObjCObjectOrInterfaceType( 926 type_clang_forward_type)) 927 class_opaque_type = type_clang_forward_type; 928 } 929 } 930 931 if (class_opaque_type) { 932 // If accessibility isn't set to anything valid, assume public 933 // for now... 934 if (attrs.accessibility == eAccessNone) 935 attrs.accessibility = eAccessPublic; 936 937 clang::ObjCMethodDecl *objc_method_decl = 938 m_ast.AddMethodToObjCObjectType( 939 class_opaque_type, attrs.name.GetCString(), clang_type, 940 attrs.accessibility, attrs.is_artificial, is_variadic, 941 attrs.is_objc_direct_call); 942 type_handled = objc_method_decl != NULL; 943 if (type_handled) { 944 LinkDeclContextToDIE(objc_method_decl, die); 945 m_ast.SetMetadataAsUserID(objc_method_decl, die.GetID()); 946 } else { 947 dwarf->GetObjectFile()->GetModule()->ReportError( 948 "{0x%8.8x}: invalid Objective-C method 0x%4.4x (%s), " 949 "please file a bug and attach the file at the start of " 950 "this error message", 951 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 952 } 953 } 954 } else if (is_cxx_method) { 955 // Look at the parent of this DIE and see if is is a class or 956 // struct and see if this is actually a C++ method 957 Type *class_type = dwarf->ResolveType(decl_ctx_die); 958 if (class_type) { 959 bool alternate_defn = false; 960 if (class_type->GetID() != decl_ctx_die.GetID() || 961 IsClangModuleFwdDecl(decl_ctx_die)) { 962 alternate_defn = true; 963 964 // We uniqued the parent class of this function to another 965 // class so we now need to associate all dies under 966 // "decl_ctx_die" to DIEs in the DIE for "class_type"... 967 DWARFDIE class_type_die = dwarf->GetDIE(class_type->GetID()); 968 969 if (class_type_die) { 970 std::vector<DWARFDIE> failures; 971 972 CopyUniqueClassMethodTypes(decl_ctx_die, class_type_die, 973 class_type, failures); 974 975 // FIXME do something with these failures that's 976 // smarter than just dropping them on the ground. 977 // Unfortunately classes don't like having stuff added 978 // to them after their definitions are complete... 979 980 Type *type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 981 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 982 return type_ptr->shared_from_this(); 983 } 984 } 985 } 986 987 if (attrs.specification.IsValid()) { 988 // We have a specification which we are going to base our 989 // function prototype off of, so we need this type to be 990 // completed so that the m_die_to_decl_ctx for the method in 991 // the specification has a valid clang decl context. 992 class_type->GetForwardCompilerType(); 993 // If we have a specification, then the function type should 994 // have been made with the specification and not with this 995 // die. 996 DWARFDIE spec_die = attrs.specification.Reference(); 997 clang::DeclContext *spec_clang_decl_ctx = 998 GetClangDeclContextForDIE(spec_die); 999 if (spec_clang_decl_ctx) { 1000 LinkDeclContextToDIE(spec_clang_decl_ctx, die); 1001 } else { 1002 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1003 "0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8x" 1004 ") has no decl\n", 1005 die.GetID(), spec_die.GetOffset()); 1006 } 1007 type_handled = true; 1008 } else if (attrs.abstract_origin.IsValid()) { 1009 // We have a specification which we are going to base our 1010 // function prototype off of, so we need this type to be 1011 // completed so that the m_die_to_decl_ctx for the method in 1012 // the abstract origin has a valid clang decl context. 1013 class_type->GetForwardCompilerType(); 1014 1015 DWARFDIE abs_die = attrs.abstract_origin.Reference(); 1016 clang::DeclContext *abs_clang_decl_ctx = 1017 GetClangDeclContextForDIE(abs_die); 1018 if (abs_clang_decl_ctx) { 1019 LinkDeclContextToDIE(abs_clang_decl_ctx, die); 1020 } else { 1021 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1022 "0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8x" 1023 ") has no decl\n", 1024 die.GetID(), abs_die.GetOffset()); 1025 } 1026 type_handled = true; 1027 } else { 1028 CompilerType class_opaque_type = 1029 class_type->GetForwardCompilerType(); 1030 if (TypeSystemClang::IsCXXClassType(class_opaque_type)) { 1031 if (class_opaque_type.IsBeingDefined() || alternate_defn) { 1032 if (!is_static && !die.HasChildren()) { 1033 // We have a C++ member function with no children (this 1034 // pointer!) and clang will get mad if we try and make 1035 // a function that isn't well formed in the DWARF, so 1036 // we will just skip it... 1037 type_handled = true; 1038 } else { 1039 bool add_method = true; 1040 if (alternate_defn) { 1041 // If an alternate definition for the class exists, 1042 // then add the method only if an equivalent is not 1043 // already present. 1044 clang::CXXRecordDecl *record_decl = 1045 m_ast.GetAsCXXRecordDecl( 1046 class_opaque_type.GetOpaqueQualType()); 1047 if (record_decl) { 1048 for (auto method_iter = record_decl->method_begin(); 1049 method_iter != record_decl->method_end(); 1050 method_iter++) { 1051 clang::CXXMethodDecl *method_decl = *method_iter; 1052 if (method_decl->getNameInfo().getAsString() == 1053 attrs.name.GetStringRef()) { 1054 if (method_decl->getType() == 1055 ClangUtil::GetQualType(clang_type)) { 1056 add_method = false; 1057 LinkDeclContextToDIE(method_decl, die); 1058 type_handled = true; 1059 1060 break; 1061 } 1062 } 1063 } 1064 } 1065 } 1066 1067 if (add_method) { 1068 llvm::PrettyStackTraceFormat stack_trace( 1069 "SymbolFileDWARF::ParseType() is adding a method " 1070 "%s to class %s in DIE 0x%8.8" PRIx64 " from %s", 1071 attrs.name.GetCString(), 1072 class_type->GetName().GetCString(), die.GetID(), 1073 dwarf->GetObjectFile() 1074 ->GetFileSpec() 1075 .GetPath() 1076 .c_str()); 1077 1078 const bool is_attr_used = false; 1079 // Neither GCC 4.2 nor clang++ currently set a valid 1080 // accessibility in the DWARF for C++ methods... 1081 // Default to public for now... 1082 if (attrs.accessibility == eAccessNone) 1083 attrs.accessibility = eAccessPublic; 1084 1085 clang::CXXMethodDecl *cxx_method_decl = 1086 m_ast.AddMethodToCXXRecordType( 1087 class_opaque_type.GetOpaqueQualType(), 1088 attrs.name.GetCString(), attrs.mangled_name, 1089 clang_type, attrs.accessibility, attrs.is_virtual, 1090 is_static, attrs.is_inline, attrs.is_explicit, 1091 is_attr_used, attrs.is_artificial); 1092 1093 type_handled = cxx_method_decl != NULL; 1094 // Artificial methods are always handled even when we 1095 // don't create a new declaration for them. 1096 type_handled |= attrs.is_artificial; 1097 1098 if (cxx_method_decl) { 1099 LinkDeclContextToDIE(cxx_method_decl, die); 1100 1101 ClangASTMetadata metadata; 1102 metadata.SetUserID(die.GetID()); 1103 1104 if (!object_pointer_name.empty()) { 1105 metadata.SetObjectPtrName( 1106 object_pointer_name.c_str()); 1107 LLDB_LOGF(log, 1108 "Setting object pointer name: %s on method " 1109 "object %p.\n", 1110 object_pointer_name.c_str(), 1111 static_cast<void *>(cxx_method_decl)); 1112 } 1113 m_ast.SetMetadata(cxx_method_decl, metadata); 1114 } else { 1115 ignore_containing_context = true; 1116 } 1117 } 1118 } 1119 } else { 1120 // We were asked to parse the type for a method in a 1121 // class, yet the class hasn't been asked to complete 1122 // itself through the clang::ExternalASTSource protocol, 1123 // so we need to just have the class complete itself and 1124 // do things the right way, then our 1125 // DIE should then have an entry in the 1126 // dwarf->GetDIEToType() map. First 1127 // we need to modify the dwarf->GetDIEToType() so it 1128 // doesn't think we are trying to parse this DIE 1129 // anymore... 1130 dwarf->GetDIEToType()[die.GetDIE()] = NULL; 1131 1132 // Now we get the full type to force our class type to 1133 // complete itself using the clang::ExternalASTSource 1134 // protocol which will parse all base classes and all 1135 // methods (including the method for this DIE). 1136 class_type->GetFullCompilerType(); 1137 1138 // The type for this DIE should have been filled in the 1139 // function call above 1140 Type *type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1141 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1142 return type_ptr->shared_from_this(); 1143 } 1144 1145 // FIXME This is fixing some even uglier behavior but we 1146 // really need to 1147 // uniq the methods of each class as well as the class 1148 // itself. <rdar://problem/11240464> 1149 type_handled = true; 1150 } 1151 } 1152 } 1153 } 1154 } 1155 } 1156 1157 if (!type_handled) { 1158 clang::FunctionDecl *function_decl = nullptr; 1159 clang::FunctionDecl *template_function_decl = nullptr; 1160 1161 if (attrs.abstract_origin.IsValid()) { 1162 DWARFDIE abs_die = attrs.abstract_origin.Reference(); 1163 1164 if (dwarf->ResolveType(abs_die)) { 1165 function_decl = llvm::dyn_cast_or_null<clang::FunctionDecl>( 1166 GetCachedClangDeclContextForDIE(abs_die)); 1167 1168 if (function_decl) { 1169 LinkDeclContextToDIE(function_decl, die); 1170 } 1171 } 1172 } 1173 1174 if (!function_decl) { 1175 const char *name = attrs.name.GetCString(); 1176 1177 // We currently generate function templates with template parameters in 1178 // their name. In order to get closer to the AST that clang generates 1179 // we want to strip these from the name when creating the AST. 1180 if (attrs.mangled_name) { 1181 llvm::ItaniumPartialDemangler D; 1182 if (!D.partialDemangle(attrs.mangled_name)) 1183 name = D.getFunctionBaseName(nullptr, nullptr); 1184 } 1185 1186 // We just have a function that isn't part of a class 1187 function_decl = m_ast.CreateFunctionDeclaration( 1188 ignore_containing_context ? m_ast.GetTranslationUnitDecl() 1189 : containing_decl_ctx, 1190 GetOwningClangModule(die), name, clang_type, attrs.storage, 1191 attrs.is_inline); 1192 1193 if (has_template_params) { 1194 TypeSystemClang::TemplateParameterInfos template_param_infos; 1195 ParseTemplateParameterInfos(die, template_param_infos); 1196 template_function_decl = m_ast.CreateFunctionDeclaration( 1197 ignore_containing_context ? m_ast.GetTranslationUnitDecl() 1198 : containing_decl_ctx, 1199 GetOwningClangModule(die), attrs.name.GetCString(), clang_type, 1200 attrs.storage, attrs.is_inline); 1201 clang::FunctionTemplateDecl *func_template_decl = 1202 m_ast.CreateFunctionTemplateDecl( 1203 containing_decl_ctx, GetOwningClangModule(die), 1204 template_function_decl, name, template_param_infos); 1205 m_ast.CreateFunctionTemplateSpecializationInfo( 1206 template_function_decl, func_template_decl, template_param_infos); 1207 } 1208 1209 lldbassert(function_decl); 1210 1211 if (function_decl) { 1212 LinkDeclContextToDIE(function_decl, die); 1213 1214 if (!function_param_decls.empty()) { 1215 m_ast.SetFunctionParameters(function_decl, 1216 &function_param_decls.front(), 1217 function_param_decls.size()); 1218 if (template_function_decl) 1219 m_ast.SetFunctionParameters(template_function_decl, 1220 &function_param_decls.front(), 1221 function_param_decls.size()); 1222 } 1223 1224 ClangASTMetadata metadata; 1225 metadata.SetUserID(die.GetID()); 1226 1227 if (!object_pointer_name.empty()) { 1228 metadata.SetObjectPtrName(object_pointer_name.c_str()); 1229 LLDB_LOGF(log, 1230 "Setting object pointer name: %s on function " 1231 "object %p.", 1232 object_pointer_name.c_str(), 1233 static_cast<void *>(function_decl)); 1234 } 1235 m_ast.SetMetadata(function_decl, metadata); 1236 } 1237 } 1238 } 1239 } 1240 return std::make_shared<Type>( 1241 die.GetID(), dwarf, attrs.name, llvm::None, nullptr, LLDB_INVALID_UID, 1242 Type::eEncodingIsUID, &attrs.decl, clang_type, Type::ResolveState::Full); 1243 } 1244 1245 TypeSP DWARFASTParserClang::ParseArrayType(const DWARFDIE &die, 1246 ParsedDWARFTypeAttributes &attrs) { 1247 SymbolFileDWARF *dwarf = die.GetDWARF(); 1248 1249 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1250 DW_TAG_value_to_name(tag), type_name_cstr); 1251 1252 DWARFDIE type_die = attrs.type.Reference(); 1253 Type *element_type = dwarf->ResolveTypeUID(type_die, true); 1254 1255 if (!element_type) 1256 return nullptr; 1257 1258 llvm::Optional<SymbolFile::ArrayInfo> array_info = ParseChildArrayInfo(die); 1259 if (array_info) { 1260 attrs.byte_stride = array_info->byte_stride; 1261 attrs.bit_stride = array_info->bit_stride; 1262 } 1263 if (attrs.byte_stride == 0 && attrs.bit_stride == 0) 1264 attrs.byte_stride = element_type->GetByteSize().getValueOr(0); 1265 CompilerType array_element_type = element_type->GetForwardCompilerType(); 1266 1267 if (TypeSystemClang::IsCXXClassType(array_element_type) && 1268 !array_element_type.GetCompleteType()) { 1269 ModuleSP module_sp = die.GetModule(); 1270 if (module_sp) { 1271 if (die.GetCU()->GetProducer() == eProducerClang) 1272 module_sp->ReportError( 1273 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a " 1274 "class/union/struct element type DIE 0x%8.8x that is a " 1275 "forward declaration, not a complete definition.\nTry " 1276 "compiling the source file with -fstandalone-debug or " 1277 "disable -gmodules", 1278 die.GetOffset(), type_die.GetOffset()); 1279 else 1280 module_sp->ReportError( 1281 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a " 1282 "class/union/struct element type DIE 0x%8.8x that is a " 1283 "forward declaration, not a complete definition.\nPlease " 1284 "file a bug against the compiler and include the " 1285 "preprocessed output for %s", 1286 die.GetOffset(), type_die.GetOffset(), GetUnitName(die).c_str()); 1287 } 1288 1289 // We have no choice other than to pretend that the element class 1290 // type is complete. If we don't do this, clang will crash when 1291 // trying to layout the class. Since we provide layout 1292 // assistance, all ivars in this class and other classes will be 1293 // fine, this is the best we can do short of crashing. 1294 if (TypeSystemClang::StartTagDeclarationDefinition(array_element_type)) { 1295 TypeSystemClang::CompleteTagDeclarationDefinition(array_element_type); 1296 } else { 1297 module_sp->ReportError("DWARF DIE at 0x%8.8x was not able to " 1298 "start its definition.\nPlease file a " 1299 "bug and attach the file at the start " 1300 "of this error message", 1301 type_die.GetOffset()); 1302 } 1303 } 1304 1305 uint64_t array_element_bit_stride = 1306 attrs.byte_stride * 8 + attrs.bit_stride; 1307 CompilerType clang_type; 1308 if (array_info && array_info->element_orders.size() > 0) { 1309 uint64_t num_elements = 0; 1310 auto end = array_info->element_orders.rend(); 1311 for (auto pos = array_info->element_orders.rbegin(); pos != end; ++pos) { 1312 num_elements = *pos; 1313 clang_type = m_ast.CreateArrayType(array_element_type, num_elements, 1314 attrs.is_vector); 1315 array_element_type = clang_type; 1316 array_element_bit_stride = num_elements 1317 ? array_element_bit_stride * num_elements 1318 : array_element_bit_stride; 1319 } 1320 } else { 1321 clang_type = 1322 m_ast.CreateArrayType(array_element_type, 0, attrs.is_vector); 1323 } 1324 ConstString empty_name; 1325 TypeSP type_sp = std::make_shared<Type>( 1326 die.GetID(), dwarf, empty_name, array_element_bit_stride / 8, nullptr, 1327 dwarf->GetUID(type_die), Type::eEncodingIsUID, &attrs.decl, clang_type, 1328 Type::ResolveState::Full); 1329 type_sp->SetEncodingType(element_type); 1330 const clang::Type *type = ClangUtil::GetQualType(clang_type).getTypePtr(); 1331 m_ast.SetMetadataAsUserID(type, die.GetID()); 1332 return type_sp; 1333 } 1334 1335 TypeSP DWARFASTParserClang::ParsePointerToMemberType( 1336 const DWARFDIE &die, const ParsedDWARFTypeAttributes &attrs) { 1337 SymbolFileDWARF *dwarf = die.GetDWARF(); 1338 Type *pointee_type = dwarf->ResolveTypeUID(attrs.type.Reference(), true); 1339 Type *class_type = 1340 dwarf->ResolveTypeUID(attrs.containing_type.Reference(), true); 1341 1342 CompilerType pointee_clang_type = pointee_type->GetForwardCompilerType(); 1343 CompilerType class_clang_type = class_type->GetLayoutCompilerType(); 1344 1345 CompilerType clang_type = TypeSystemClang::CreateMemberPointerType( 1346 class_clang_type, pointee_clang_type); 1347 1348 if (llvm::Optional<uint64_t> clang_type_size = 1349 clang_type.GetByteSize(nullptr)) { 1350 return std::make_shared<Type>(die.GetID(), dwarf, attrs.name, 1351 *clang_type_size, nullptr, LLDB_INVALID_UID, 1352 Type::eEncodingIsUID, nullptr, clang_type, 1353 Type::ResolveState::Forward); 1354 } 1355 return nullptr; 1356 } 1357 1358 TypeSP DWARFASTParserClang::UpdateSymbolContextScopeForType( 1359 const SymbolContext &sc, const DWARFDIE &die, TypeSP type_sp) { 1360 if (!type_sp) 1361 return type_sp; 1362 1363 SymbolFileDWARF *dwarf = die.GetDWARF(); 1364 TypeList &type_list = dwarf->GetTypeList(); 1365 DWARFDIE sc_parent_die = SymbolFileDWARF::GetParentSymbolContextDIE(die); 1366 dw_tag_t sc_parent_tag = sc_parent_die.Tag(); 1367 1368 SymbolContextScope *symbol_context_scope = nullptr; 1369 if (sc_parent_tag == DW_TAG_compile_unit || 1370 sc_parent_tag == DW_TAG_partial_unit) { 1371 symbol_context_scope = sc.comp_unit; 1372 } else if (sc.function != nullptr && sc_parent_die) { 1373 symbol_context_scope = 1374 sc.function->GetBlock(true).FindBlockByID(sc_parent_die.GetID()); 1375 if (symbol_context_scope == nullptr) 1376 symbol_context_scope = sc.function; 1377 } else { 1378 symbol_context_scope = sc.module_sp.get(); 1379 } 1380 1381 if (symbol_context_scope != nullptr) 1382 type_sp->SetSymbolContextScope(symbol_context_scope); 1383 1384 // We are ready to put this type into the uniqued list up at the module 1385 // level. 1386 type_list.Insert(type_sp); 1387 1388 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1389 return type_sp; 1390 } 1391 1392 TypeSP 1393 DWARFASTParserClang::ParseStructureLikeDIE(const SymbolContext &sc, 1394 const DWARFDIE &die, 1395 ParsedDWARFTypeAttributes &attrs) { 1396 TypeSP type_sp; 1397 CompilerType clang_type; 1398 const dw_tag_t tag = die.Tag(); 1399 SymbolFileDWARF *dwarf = die.GetDWARF(); 1400 LanguageType cu_language = SymbolFileDWARF::GetLanguage(*die.GetCU()); 1401 Log *log = LogChannelDWARF::GetLogIfAll(DWARF_LOG_TYPE_COMPLETION | 1402 DWARF_LOG_LOOKUPS); 1403 1404 // UniqueDWARFASTType is large, so don't create a local variables on the 1405 // stack, put it on the heap. This function is often called recursively and 1406 // clang isn't good at sharing the stack space for variables in different 1407 // blocks. 1408 auto unique_ast_entry_up = std::make_unique<UniqueDWARFASTType>(); 1409 1410 ConstString unique_typename(attrs.name); 1411 Declaration unique_decl(attrs.decl); 1412 1413 if (attrs.name) { 1414 if (Language::LanguageIsCPlusPlus(cu_language)) { 1415 // For C++, we rely solely upon the one definition rule that says 1416 // only one thing can exist at a given decl context. We ignore the 1417 // file and line that things are declared on. 1418 std::string qualified_name; 1419 if (die.GetQualifiedName(qualified_name)) 1420 unique_typename = ConstString(qualified_name); 1421 unique_decl.Clear(); 1422 } 1423 1424 if (dwarf->GetUniqueDWARFASTTypeMap().Find( 1425 unique_typename, die, unique_decl, attrs.byte_size.getValueOr(-1), 1426 *unique_ast_entry_up)) { 1427 type_sp = unique_ast_entry_up->m_type_sp; 1428 if (type_sp) { 1429 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1430 LinkDeclContextToDIE( 1431 GetCachedClangDeclContextForDIE(unique_ast_entry_up->m_die), die); 1432 return type_sp; 1433 } 1434 } 1435 } 1436 1437 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1438 DW_TAG_value_to_name(tag), type_name_cstr); 1439 1440 int tag_decl_kind = -1; 1441 AccessType default_accessibility = eAccessNone; 1442 if (tag == DW_TAG_structure_type) { 1443 tag_decl_kind = clang::TTK_Struct; 1444 default_accessibility = eAccessPublic; 1445 } else if (tag == DW_TAG_union_type) { 1446 tag_decl_kind = clang::TTK_Union; 1447 default_accessibility = eAccessPublic; 1448 } else if (tag == DW_TAG_class_type) { 1449 tag_decl_kind = clang::TTK_Class; 1450 default_accessibility = eAccessPrivate; 1451 } 1452 1453 if (attrs.byte_size && *attrs.byte_size == 0 && attrs.name && 1454 !die.HasChildren() && cu_language == eLanguageTypeObjC) { 1455 // Work around an issue with clang at the moment where forward 1456 // declarations for objective C classes are emitted as: 1457 // DW_TAG_structure_type [2] 1458 // DW_AT_name( "ForwardObjcClass" ) 1459 // DW_AT_byte_size( 0x00 ) 1460 // DW_AT_decl_file( "..." ) 1461 // DW_AT_decl_line( 1 ) 1462 // 1463 // Note that there is no DW_AT_declaration and there are no children, 1464 // and the byte size is zero. 1465 attrs.is_forward_declaration = true; 1466 } 1467 1468 if (attrs.class_language == eLanguageTypeObjC || 1469 attrs.class_language == eLanguageTypeObjC_plus_plus) { 1470 if (!attrs.is_complete_objc_class && 1471 die.Supports_DW_AT_APPLE_objc_complete_type()) { 1472 // We have a valid eSymbolTypeObjCClass class symbol whose name 1473 // matches the current objective C class that we are trying to find 1474 // and this DIE isn't the complete definition (we checked 1475 // is_complete_objc_class above and know it is false), so the real 1476 // definition is in here somewhere 1477 type_sp = 1478 dwarf->FindCompleteObjCDefinitionTypeForDIE(die, attrs.name, true); 1479 1480 if (!type_sp) { 1481 SymbolFileDWARFDebugMap *debug_map_symfile = 1482 dwarf->GetDebugMapSymfile(); 1483 if (debug_map_symfile) { 1484 // We weren't able to find a full declaration in this DWARF, 1485 // see if we have a declaration anywhere else... 1486 type_sp = debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE( 1487 die, attrs.name, true); 1488 } 1489 } 1490 1491 if (type_sp) { 1492 if (log) { 1493 dwarf->GetObjectFile()->GetModule()->LogMessage( 1494 log, 1495 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is an " 1496 "incomplete objc type, complete type is 0x%8.8" PRIx64, 1497 static_cast<void *>(this), die.GetOffset(), 1498 DW_TAG_value_to_name(tag), attrs.name.GetCString(), 1499 type_sp->GetID()); 1500 } 1501 1502 // We found a real definition for this type elsewhere so lets use 1503 // it and cache the fact that we found a complete type for this 1504 // die 1505 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1506 return type_sp; 1507 } 1508 } 1509 } 1510 1511 if (attrs.is_forward_declaration) { 1512 // We have a forward declaration to a type and we need to try and 1513 // find a full declaration. We look in the current type index just in 1514 // case we have a forward declaration followed by an actual 1515 // declarations in the DWARF. If this fails, we need to look 1516 // elsewhere... 1517 if (log) { 1518 dwarf->GetObjectFile()->GetModule()->LogMessage( 1519 log, 1520 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 1521 "forward declaration, trying to find complete type", 1522 static_cast<void *>(this), die.GetOffset(), DW_TAG_value_to_name(tag), 1523 attrs.name.GetCString()); 1524 } 1525 1526 // See if the type comes from a Clang module and if so, track down 1527 // that type. 1528 type_sp = ParseTypeFromClangModule(sc, die, log); 1529 if (type_sp) 1530 return type_sp; 1531 1532 DWARFDeclContext die_decl_ctx = SymbolFileDWARF::GetDWARFDeclContext(die); 1533 1534 // type_sp = FindDefinitionTypeForDIE (dwarf_cu, die, 1535 // type_name_const_str); 1536 type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx); 1537 1538 if (!type_sp) { 1539 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 1540 if (debug_map_symfile) { 1541 // We weren't able to find a full declaration in this DWARF, see 1542 // if we have a declaration anywhere else... 1543 type_sp = debug_map_symfile->FindDefinitionTypeForDWARFDeclContext( 1544 die_decl_ctx); 1545 } 1546 } 1547 1548 if (type_sp) { 1549 if (log) { 1550 dwarf->GetObjectFile()->GetModule()->LogMessage( 1551 log, 1552 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 1553 "forward declaration, complete type is 0x%8.8" PRIx64, 1554 static_cast<void *>(this), die.GetOffset(), 1555 DW_TAG_value_to_name(tag), attrs.name.GetCString(), 1556 type_sp->GetID()); 1557 } 1558 1559 // We found a real definition for this type elsewhere so lets use 1560 // it and cache the fact that we found a complete type for this die 1561 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1562 clang::DeclContext *defn_decl_ctx = 1563 GetCachedClangDeclContextForDIE(dwarf->GetDIE(type_sp->GetID())); 1564 if (defn_decl_ctx) 1565 LinkDeclContextToDIE(defn_decl_ctx, die); 1566 return type_sp; 1567 } 1568 } 1569 assert(tag_decl_kind != -1); 1570 bool clang_type_was_created = false; 1571 clang_type.SetCompilerType( 1572 &m_ast, dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE())); 1573 if (!clang_type) { 1574 clang::DeclContext *decl_ctx = 1575 GetClangDeclContextContainingDIE(die, nullptr); 1576 1577 // If your decl context is a record that was imported from another 1578 // AST context (in the gmodules case), we need to make sure the type 1579 // backing the Decl is complete before adding children to it. This is 1580 // not an issue in the non-gmodules case because the debug info will 1581 // always contain a full definition of parent types in that case. 1582 CompleteExternalTagDeclType(m_ast, GetClangASTImporter(), decl_ctx, die, 1583 attrs.name.GetCString()); 1584 1585 if (attrs.accessibility == eAccessNone && decl_ctx) { 1586 // Check the decl context that contains this class/struct/union. If 1587 // it is a class we must give it an accessibility. 1588 const clang::Decl::Kind containing_decl_kind = decl_ctx->getDeclKind(); 1589 if (DeclKindIsCXXClass(containing_decl_kind)) 1590 attrs.accessibility = default_accessibility; 1591 } 1592 1593 ClangASTMetadata metadata; 1594 metadata.SetUserID(die.GetID()); 1595 metadata.SetIsDynamicCXXType(dwarf->ClassOrStructIsVirtual(die)); 1596 1597 if (attrs.name.GetStringRef().contains('<')) { 1598 TypeSystemClang::TemplateParameterInfos template_param_infos; 1599 if (ParseTemplateParameterInfos(die, template_param_infos)) { 1600 clang::ClassTemplateDecl *class_template_decl = 1601 m_ast.ParseClassTemplateDecl( 1602 decl_ctx, GetOwningClangModule(die), attrs.accessibility, 1603 attrs.name.GetCString(), tag_decl_kind, template_param_infos); 1604 if (!class_template_decl) { 1605 if (log) { 1606 dwarf->GetObjectFile()->GetModule()->LogMessage( 1607 log, 1608 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" " 1609 "clang::ClassTemplateDecl failed to return a decl.", 1610 static_cast<void *>(this), die.GetOffset(), 1611 DW_TAG_value_to_name(tag), attrs.name.GetCString()); 1612 } 1613 return TypeSP(); 1614 } 1615 1616 clang::ClassTemplateSpecializationDecl *class_specialization_decl = 1617 m_ast.CreateClassTemplateSpecializationDecl( 1618 decl_ctx, GetOwningClangModule(die), class_template_decl, 1619 tag_decl_kind, template_param_infos); 1620 clang_type = m_ast.CreateClassTemplateSpecializationType( 1621 class_specialization_decl); 1622 clang_type_was_created = true; 1623 1624 m_ast.SetMetadata(class_template_decl, metadata); 1625 m_ast.SetMetadata(class_specialization_decl, metadata); 1626 } 1627 } 1628 1629 if (!clang_type_was_created) { 1630 clang_type_was_created = true; 1631 clang_type = m_ast.CreateRecordType( 1632 decl_ctx, GetOwningClangModule(die), attrs.accessibility, 1633 attrs.name.GetCString(), tag_decl_kind, attrs.class_language, 1634 &metadata, attrs.exports_symbols); 1635 } 1636 } 1637 1638 // Store a forward declaration to this class type in case any 1639 // parameters in any class methods need it for the clang types for 1640 // function prototypes. 1641 LinkDeclContextToDIE(m_ast.GetDeclContextForType(clang_type), die); 1642 type_sp = std::make_shared<Type>( 1643 die.GetID(), dwarf, attrs.name, attrs.byte_size, nullptr, 1644 LLDB_INVALID_UID, Type::eEncodingIsUID, &attrs.decl, clang_type, 1645 Type::ResolveState::Forward, 1646 TypePayloadClang(OptionalClangModuleID(), attrs.is_complete_objc_class)); 1647 1648 // Add our type to the unique type map so we don't end up creating many 1649 // copies of the same type over and over in the ASTContext for our 1650 // module 1651 unique_ast_entry_up->m_type_sp = type_sp; 1652 unique_ast_entry_up->m_die = die; 1653 unique_ast_entry_up->m_declaration = unique_decl; 1654 unique_ast_entry_up->m_byte_size = attrs.byte_size.getValueOr(0); 1655 dwarf->GetUniqueDWARFASTTypeMap().Insert(unique_typename, 1656 *unique_ast_entry_up); 1657 1658 if (attrs.is_forward_declaration && die.HasChildren()) { 1659 // Check to see if the DIE actually has a definition, some version of 1660 // GCC will 1661 // emit DIEs with DW_AT_declaration set to true, but yet still have 1662 // subprogram, members, or inheritance, so we can't trust it 1663 DWARFDIE child_die = die.GetFirstChild(); 1664 while (child_die) { 1665 switch (child_die.Tag()) { 1666 case DW_TAG_inheritance: 1667 case DW_TAG_subprogram: 1668 case DW_TAG_member: 1669 case DW_TAG_APPLE_property: 1670 case DW_TAG_class_type: 1671 case DW_TAG_structure_type: 1672 case DW_TAG_enumeration_type: 1673 case DW_TAG_typedef: 1674 case DW_TAG_union_type: 1675 child_die.Clear(); 1676 attrs.is_forward_declaration = false; 1677 break; 1678 default: 1679 child_die = child_die.GetSibling(); 1680 break; 1681 } 1682 } 1683 } 1684 1685 if (!attrs.is_forward_declaration) { 1686 // Always start the definition for a class type so that if the class 1687 // has child classes or types that require the class to be created 1688 // for use as their decl contexts the class will be ready to accept 1689 // these child definitions. 1690 if (!die.HasChildren()) { 1691 // No children for this struct/union/class, lets finish it 1692 if (TypeSystemClang::StartTagDeclarationDefinition(clang_type)) { 1693 TypeSystemClang::CompleteTagDeclarationDefinition(clang_type); 1694 } else { 1695 dwarf->GetObjectFile()->GetModule()->ReportError( 1696 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 1697 "definition.\nPlease file a bug and attach the file at the " 1698 "start of this error message", 1699 die.GetOffset(), attrs.name.GetCString()); 1700 } 1701 1702 if (tag == DW_TAG_structure_type) // this only applies in C 1703 { 1704 clang::RecordDecl *record_decl = 1705 TypeSystemClang::GetAsRecordDecl(clang_type); 1706 1707 if (record_decl) { 1708 GetClangASTImporter().SetRecordLayout( 1709 record_decl, ClangASTImporter::LayoutInfo()); 1710 } 1711 } 1712 } else if (clang_type_was_created) { 1713 // Start the definition if the class is not objective C since the 1714 // underlying decls respond to isCompleteDefinition(). Objective 1715 // C decls don't respond to isCompleteDefinition() so we can't 1716 // start the declaration definition right away. For C++ 1717 // class/union/structs we want to start the definition in case the 1718 // class is needed as the declaration context for a contained class 1719 // or type without the need to complete that type.. 1720 1721 if (attrs.class_language != eLanguageTypeObjC && 1722 attrs.class_language != eLanguageTypeObjC_plus_plus) 1723 TypeSystemClang::StartTagDeclarationDefinition(clang_type); 1724 1725 // Leave this as a forward declaration until we need to know the 1726 // details of the type. lldb_private::Type will automatically call 1727 // the SymbolFile virtual function 1728 // "SymbolFileDWARF::CompleteType(Type *)" When the definition 1729 // needs to be defined. 1730 assert(!dwarf->GetForwardDeclClangTypeToDie().count( 1731 ClangUtil::RemoveFastQualifiers(clang_type) 1732 .GetOpaqueQualType()) && 1733 "Type already in the forward declaration map!"); 1734 // Can't assume m_ast.GetSymbolFile() is actually a 1735 // SymbolFileDWARF, it can be a SymbolFileDWARFDebugMap for Apple 1736 // binaries. 1737 dwarf->GetForwardDeclDieToClangType()[die.GetDIE()] = 1738 clang_type.GetOpaqueQualType(); 1739 dwarf->GetForwardDeclClangTypeToDie().try_emplace( 1740 ClangUtil::RemoveFastQualifiers(clang_type).GetOpaqueQualType(), 1741 *die.GetDIERef()); 1742 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), true); 1743 } 1744 } 1745 1746 // If we made a clang type, set the trivial abi if applicable: We only 1747 // do this for pass by value - which implies the Trivial ABI. There 1748 // isn't a way to assert that something that would normally be pass by 1749 // value is pass by reference, so we ignore that attribute if set. 1750 if (attrs.calling_convention == llvm::dwarf::DW_CC_pass_by_value) { 1751 clang::CXXRecordDecl *record_decl = 1752 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 1753 if (record_decl && record_decl->getDefinition()) { 1754 record_decl->setHasTrivialSpecialMemberForCall(); 1755 } 1756 } 1757 1758 if (attrs.calling_convention == llvm::dwarf::DW_CC_pass_by_reference) { 1759 clang::CXXRecordDecl *record_decl = 1760 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 1761 if (record_decl) 1762 record_decl->setArgPassingRestrictions( 1763 clang::RecordDecl::APK_CannotPassInRegs); 1764 } 1765 return type_sp; 1766 } 1767 1768 // DWARF parsing functions 1769 1770 class DWARFASTParserClang::DelayedAddObjCClassProperty { 1771 public: 1772 DelayedAddObjCClassProperty( 1773 const CompilerType &class_opaque_type, const char *property_name, 1774 const CompilerType &property_opaque_type, // The property type is only 1775 // required if you don't have an 1776 // ivar decl 1777 clang::ObjCIvarDecl *ivar_decl, const char *property_setter_name, 1778 const char *property_getter_name, uint32_t property_attributes, 1779 const ClangASTMetadata *metadata) 1780 : m_class_opaque_type(class_opaque_type), m_property_name(property_name), 1781 m_property_opaque_type(property_opaque_type), m_ivar_decl(ivar_decl), 1782 m_property_setter_name(property_setter_name), 1783 m_property_getter_name(property_getter_name), 1784 m_property_attributes(property_attributes) { 1785 if (metadata != nullptr) { 1786 m_metadata_up.reset(new ClangASTMetadata()); 1787 *m_metadata_up = *metadata; 1788 } 1789 } 1790 1791 DelayedAddObjCClassProperty(const DelayedAddObjCClassProperty &rhs) { 1792 *this = rhs; 1793 } 1794 1795 DelayedAddObjCClassProperty & 1796 operator=(const DelayedAddObjCClassProperty &rhs) { 1797 m_class_opaque_type = rhs.m_class_opaque_type; 1798 m_property_name = rhs.m_property_name; 1799 m_property_opaque_type = rhs.m_property_opaque_type; 1800 m_ivar_decl = rhs.m_ivar_decl; 1801 m_property_setter_name = rhs.m_property_setter_name; 1802 m_property_getter_name = rhs.m_property_getter_name; 1803 m_property_attributes = rhs.m_property_attributes; 1804 1805 if (rhs.m_metadata_up) { 1806 m_metadata_up.reset(new ClangASTMetadata()); 1807 *m_metadata_up = *rhs.m_metadata_up; 1808 } 1809 return *this; 1810 } 1811 1812 bool Finalize() { 1813 return TypeSystemClang::AddObjCClassProperty( 1814 m_class_opaque_type, m_property_name, m_property_opaque_type, 1815 m_ivar_decl, m_property_setter_name, m_property_getter_name, 1816 m_property_attributes, m_metadata_up.get()); 1817 } 1818 1819 private: 1820 CompilerType m_class_opaque_type; 1821 const char *m_property_name; 1822 CompilerType m_property_opaque_type; 1823 clang::ObjCIvarDecl *m_ivar_decl; 1824 const char *m_property_setter_name; 1825 const char *m_property_getter_name; 1826 uint32_t m_property_attributes; 1827 std::unique_ptr<ClangASTMetadata> m_metadata_up; 1828 }; 1829 1830 bool DWARFASTParserClang::ParseTemplateDIE( 1831 const DWARFDIE &die, 1832 TypeSystemClang::TemplateParameterInfos &template_param_infos) { 1833 const dw_tag_t tag = die.Tag(); 1834 bool is_template_template_argument = false; 1835 1836 switch (tag) { 1837 case DW_TAG_GNU_template_parameter_pack: { 1838 template_param_infos.packed_args.reset( 1839 new TypeSystemClang::TemplateParameterInfos); 1840 for (DWARFDIE child_die = die.GetFirstChild(); child_die.IsValid(); 1841 child_die = child_die.GetSibling()) { 1842 if (!ParseTemplateDIE(child_die, *template_param_infos.packed_args)) 1843 return false; 1844 } 1845 if (const char *name = die.GetName()) { 1846 template_param_infos.pack_name = name; 1847 } 1848 return true; 1849 } 1850 case DW_TAG_GNU_template_template_param: 1851 is_template_template_argument = true; 1852 LLVM_FALLTHROUGH; 1853 case DW_TAG_template_type_parameter: 1854 case DW_TAG_template_value_parameter: { 1855 DWARFAttributes attributes; 1856 const size_t num_attributes = die.GetAttributes(attributes); 1857 const char *name = nullptr; 1858 const char *template_name = nullptr; 1859 CompilerType clang_type; 1860 uint64_t uval64 = 0; 1861 bool uval64_valid = false; 1862 if (num_attributes > 0) { 1863 DWARFFormValue form_value; 1864 for (size_t i = 0; i < num_attributes; ++i) { 1865 const dw_attr_t attr = attributes.AttributeAtIndex(i); 1866 1867 switch (attr) { 1868 case DW_AT_name: 1869 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1870 name = form_value.AsCString(); 1871 break; 1872 1873 case DW_AT_GNU_template_name: 1874 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1875 template_name = form_value.AsCString(); 1876 break; 1877 1878 case DW_AT_type: 1879 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1880 Type *lldb_type = die.ResolveTypeUID(form_value.Reference()); 1881 if (lldb_type) 1882 clang_type = lldb_type->GetForwardCompilerType(); 1883 } 1884 break; 1885 1886 case DW_AT_const_value: 1887 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1888 uval64_valid = true; 1889 uval64 = form_value.Unsigned(); 1890 } 1891 break; 1892 default: 1893 break; 1894 } 1895 } 1896 1897 clang::ASTContext &ast = m_ast.getASTContext(); 1898 if (!clang_type) 1899 clang_type = m_ast.GetBasicType(eBasicTypeVoid); 1900 1901 if (!is_template_template_argument) { 1902 bool is_signed = false; 1903 if (name && name[0]) 1904 template_param_infos.names.push_back(name); 1905 else 1906 template_param_infos.names.push_back(NULL); 1907 1908 // Get the signed value for any integer or enumeration if available 1909 clang_type.IsIntegerOrEnumerationType(is_signed); 1910 1911 if (tag == DW_TAG_template_value_parameter && uval64_valid) { 1912 llvm::Optional<uint64_t> size = clang_type.GetBitSize(nullptr); 1913 if (!size) 1914 return false; 1915 llvm::APInt apint(*size, uval64, is_signed); 1916 template_param_infos.args.push_back( 1917 clang::TemplateArgument(ast, llvm::APSInt(apint, !is_signed), 1918 ClangUtil::GetQualType(clang_type))); 1919 } else { 1920 template_param_infos.args.push_back( 1921 clang::TemplateArgument(ClangUtil::GetQualType(clang_type))); 1922 } 1923 } else { 1924 auto *tplt_type = m_ast.CreateTemplateTemplateParmDecl(template_name); 1925 template_param_infos.names.push_back(name); 1926 template_param_infos.args.push_back( 1927 clang::TemplateArgument(clang::TemplateName(tplt_type))); 1928 } 1929 } 1930 } 1931 return true; 1932 1933 default: 1934 break; 1935 } 1936 return false; 1937 } 1938 1939 bool DWARFASTParserClang::ParseTemplateParameterInfos( 1940 const DWARFDIE &parent_die, 1941 TypeSystemClang::TemplateParameterInfos &template_param_infos) { 1942 1943 if (!parent_die) 1944 return false; 1945 1946 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 1947 die = die.GetSibling()) { 1948 const dw_tag_t tag = die.Tag(); 1949 1950 switch (tag) { 1951 case DW_TAG_template_type_parameter: 1952 case DW_TAG_template_value_parameter: 1953 case DW_TAG_GNU_template_parameter_pack: 1954 case DW_TAG_GNU_template_template_param: 1955 ParseTemplateDIE(die, template_param_infos); 1956 break; 1957 1958 default: 1959 break; 1960 } 1961 } 1962 if (template_param_infos.args.empty()) 1963 return false; 1964 return template_param_infos.args.size() == template_param_infos.names.size(); 1965 } 1966 1967 bool DWARFASTParserClang::CompleteRecordType(const DWARFDIE &die, 1968 lldb_private::Type *type, 1969 CompilerType &clang_type) { 1970 const dw_tag_t tag = die.Tag(); 1971 SymbolFileDWARF *dwarf = die.GetDWARF(); 1972 1973 ClangASTImporter::LayoutInfo layout_info; 1974 1975 if (die.HasChildren()) { 1976 LanguageType class_language = eLanguageTypeUnknown; 1977 if (TypeSystemClang::IsObjCObjectOrInterfaceType(clang_type)) { 1978 class_language = eLanguageTypeObjC; 1979 // For objective C we don't start the definition when the class is 1980 // created. 1981 TypeSystemClang::StartTagDeclarationDefinition(clang_type); 1982 } 1983 1984 int tag_decl_kind = -1; 1985 AccessType default_accessibility = eAccessNone; 1986 if (tag == DW_TAG_structure_type) { 1987 tag_decl_kind = clang::TTK_Struct; 1988 default_accessibility = eAccessPublic; 1989 } else if (tag == DW_TAG_union_type) { 1990 tag_decl_kind = clang::TTK_Union; 1991 default_accessibility = eAccessPublic; 1992 } else if (tag == DW_TAG_class_type) { 1993 tag_decl_kind = clang::TTK_Class; 1994 default_accessibility = eAccessPrivate; 1995 } 1996 1997 std::vector<std::unique_ptr<clang::CXXBaseSpecifier>> bases; 1998 std::vector<int> member_accessibilities; 1999 bool is_a_class = false; 2000 // Parse members and base classes first 2001 std::vector<DWARFDIE> member_function_dies; 2002 2003 DelayedPropertyList delayed_properties; 2004 ParseChildMembers(die, clang_type, class_language, bases, 2005 member_accessibilities, member_function_dies, 2006 delayed_properties, default_accessibility, is_a_class, 2007 layout_info); 2008 2009 // Now parse any methods if there were any... 2010 for (const DWARFDIE &die : member_function_dies) 2011 dwarf->ResolveType(die); 2012 2013 if (class_language == eLanguageTypeObjC) { 2014 ConstString class_name(clang_type.GetTypeName()); 2015 if (class_name) { 2016 dwarf->GetObjCMethods(class_name, [&](DWARFDIE method_die) { 2017 method_die.ResolveType(); 2018 return true; 2019 }); 2020 2021 for (DelayedPropertyList::iterator pi = delayed_properties.begin(), 2022 pe = delayed_properties.end(); 2023 pi != pe; ++pi) 2024 pi->Finalize(); 2025 } 2026 } 2027 2028 // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we 2029 // need to tell the clang type it is actually a class. 2030 if (class_language != eLanguageTypeObjC) { 2031 if (is_a_class && tag_decl_kind != clang::TTK_Class) 2032 m_ast.SetTagTypeKind(ClangUtil::GetQualType(clang_type), 2033 clang::TTK_Class); 2034 } 2035 2036 // Since DW_TAG_structure_type gets used for both classes and 2037 // structures, we may need to set any DW_TAG_member fields to have a 2038 // "private" access if none was specified. When we parsed the child 2039 // members we tracked that actual accessibility value for each 2040 // DW_TAG_member in the "member_accessibilities" array. If the value 2041 // for the member is zero, then it was set to the 2042 // "default_accessibility" which for structs was "public". Below we 2043 // correct this by setting any fields to "private" that weren't 2044 // correctly set. 2045 if (is_a_class && !member_accessibilities.empty()) { 2046 // This is a class and all members that didn't have their access 2047 // specified are private. 2048 m_ast.SetDefaultAccessForRecordFields( 2049 m_ast.GetAsRecordDecl(clang_type), eAccessPrivate, 2050 &member_accessibilities.front(), member_accessibilities.size()); 2051 } 2052 2053 if (!bases.empty()) { 2054 // Make sure all base classes refer to complete types and not forward 2055 // declarations. If we don't do this, clang will crash with an 2056 // assertion in the call to clang_type.TransferBaseClasses() 2057 for (const auto &base_class : bases) { 2058 clang::TypeSourceInfo *type_source_info = 2059 base_class->getTypeSourceInfo(); 2060 if (type_source_info) { 2061 CompilerType base_class_type = 2062 m_ast.GetType(type_source_info->getType()); 2063 if (!base_class_type.GetCompleteType()) { 2064 auto module = dwarf->GetObjectFile()->GetModule(); 2065 module->ReportError(":: Class '%s' has a base class '%s' which " 2066 "does not have a complete definition.", 2067 die.GetName(), 2068 base_class_type.GetTypeName().GetCString()); 2069 if (die.GetCU()->GetProducer() == eProducerClang) 2070 module->ReportError(":: Try compiling the source file with " 2071 "-fstandalone-debug."); 2072 2073 // We have no choice other than to pretend that the base class 2074 // is complete. If we don't do this, clang will crash when we 2075 // call setBases() inside of 2076 // "clang_type.TransferBaseClasses()" below. Since we 2077 // provide layout assistance, all ivars in this class and other 2078 // classes will be fine, this is the best we can do short of 2079 // crashing. 2080 if (TypeSystemClang::StartTagDeclarationDefinition( 2081 base_class_type)) { 2082 TypeSystemClang::CompleteTagDeclarationDefinition( 2083 base_class_type); 2084 } 2085 } 2086 } 2087 } 2088 2089 m_ast.TransferBaseClasses(clang_type.GetOpaqueQualType(), 2090 std::move(bases)); 2091 } 2092 } 2093 2094 m_ast.AddMethodOverridesForCXXRecordType(clang_type.GetOpaqueQualType()); 2095 TypeSystemClang::BuildIndirectFields(clang_type); 2096 TypeSystemClang::CompleteTagDeclarationDefinition(clang_type); 2097 2098 if (!layout_info.field_offsets.empty() || !layout_info.base_offsets.empty() || 2099 !layout_info.vbase_offsets.empty()) { 2100 if (type) 2101 layout_info.bit_size = type->GetByteSize().getValueOr(0) * 8; 2102 if (layout_info.bit_size == 0) 2103 layout_info.bit_size = 2104 die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 0) * 8; 2105 2106 clang::CXXRecordDecl *record_decl = 2107 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 2108 if (record_decl) 2109 GetClangASTImporter().SetRecordLayout(record_decl, layout_info); 2110 } 2111 2112 return (bool)clang_type; 2113 } 2114 2115 bool DWARFASTParserClang::CompleteEnumType(const DWARFDIE &die, 2116 lldb_private::Type *type, 2117 CompilerType &clang_type) { 2118 if (TypeSystemClang::StartTagDeclarationDefinition(clang_type)) { 2119 if (die.HasChildren()) { 2120 bool is_signed = false; 2121 clang_type.IsIntegerType(is_signed); 2122 ParseChildEnumerators(clang_type, is_signed, 2123 type->GetByteSize().getValueOr(0), die); 2124 } 2125 TypeSystemClang::CompleteTagDeclarationDefinition(clang_type); 2126 } 2127 return (bool)clang_type; 2128 } 2129 2130 bool DWARFASTParserClang::CompleteTypeFromDWARF(const DWARFDIE &die, 2131 lldb_private::Type *type, 2132 CompilerType &clang_type) { 2133 SymbolFileDWARF *dwarf = die.GetDWARF(); 2134 2135 std::lock_guard<std::recursive_mutex> guard( 2136 dwarf->GetObjectFile()->GetModule()->GetMutex()); 2137 2138 // Disable external storage for this type so we don't get anymore 2139 // clang::ExternalASTSource queries for this type. 2140 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), false); 2141 2142 if (!die) 2143 return false; 2144 2145 const dw_tag_t tag = die.Tag(); 2146 2147 Log *log = 2148 nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION)); 2149 if (log) 2150 dwarf->GetObjectFile()->GetModule()->LogMessageVerboseBacktrace( 2151 log, "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...", 2152 die.GetID(), die.GetTagAsCString(), type->GetName().AsCString()); 2153 assert(clang_type); 2154 DWARFAttributes attributes; 2155 switch (tag) { 2156 case DW_TAG_structure_type: 2157 case DW_TAG_union_type: 2158 case DW_TAG_class_type: 2159 return CompleteRecordType(die, type, clang_type); 2160 case DW_TAG_enumeration_type: 2161 return CompleteEnumType(die, type, clang_type); 2162 default: 2163 assert(false && "not a forward clang type decl!"); 2164 break; 2165 } 2166 2167 return false; 2168 } 2169 2170 void DWARFASTParserClang::EnsureAllDIEsInDeclContextHaveBeenParsed( 2171 lldb_private::CompilerDeclContext decl_context) { 2172 auto opaque_decl_ctx = 2173 (clang::DeclContext *)decl_context.GetOpaqueDeclContext(); 2174 for (auto it = m_decl_ctx_to_die.find(opaque_decl_ctx); 2175 it != m_decl_ctx_to_die.end() && it->first == opaque_decl_ctx; 2176 it = m_decl_ctx_to_die.erase(it)) 2177 for (DWARFDIE decl = it->second.GetFirstChild(); decl; 2178 decl = decl.GetSibling()) 2179 GetClangDeclForDIE(decl); 2180 } 2181 2182 CompilerDecl DWARFASTParserClang::GetDeclForUIDFromDWARF(const DWARFDIE &die) { 2183 clang::Decl *clang_decl = GetClangDeclForDIE(die); 2184 if (clang_decl != nullptr) 2185 return m_ast.GetCompilerDecl(clang_decl); 2186 return CompilerDecl(); 2187 } 2188 2189 CompilerDeclContext 2190 DWARFASTParserClang::GetDeclContextForUIDFromDWARF(const DWARFDIE &die) { 2191 clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE(die); 2192 if (clang_decl_ctx) 2193 return m_ast.CreateDeclContext(clang_decl_ctx); 2194 return CompilerDeclContext(); 2195 } 2196 2197 CompilerDeclContext 2198 DWARFASTParserClang::GetDeclContextContainingUIDFromDWARF(const DWARFDIE &die) { 2199 clang::DeclContext *clang_decl_ctx = 2200 GetClangDeclContextContainingDIE(die, nullptr); 2201 if (clang_decl_ctx) 2202 return m_ast.CreateDeclContext(clang_decl_ctx); 2203 return CompilerDeclContext(); 2204 } 2205 2206 size_t DWARFASTParserClang::ParseChildEnumerators( 2207 lldb_private::CompilerType &clang_type, bool is_signed, 2208 uint32_t enumerator_byte_size, const DWARFDIE &parent_die) { 2209 if (!parent_die) 2210 return 0; 2211 2212 size_t enumerators_added = 0; 2213 2214 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2215 die = die.GetSibling()) { 2216 const dw_tag_t tag = die.Tag(); 2217 if (tag == DW_TAG_enumerator) { 2218 DWARFAttributes attributes; 2219 const size_t num_child_attributes = die.GetAttributes(attributes); 2220 if (num_child_attributes > 0) { 2221 const char *name = nullptr; 2222 bool got_value = false; 2223 int64_t enum_value = 0; 2224 Declaration decl; 2225 2226 uint32_t i; 2227 for (i = 0; i < num_child_attributes; ++i) { 2228 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2229 DWARFFormValue form_value; 2230 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2231 switch (attr) { 2232 case DW_AT_const_value: 2233 got_value = true; 2234 if (is_signed) 2235 enum_value = form_value.Signed(); 2236 else 2237 enum_value = form_value.Unsigned(); 2238 break; 2239 2240 case DW_AT_name: 2241 name = form_value.AsCString(); 2242 break; 2243 2244 case DW_AT_description: 2245 default: 2246 case DW_AT_decl_file: 2247 decl.SetFile(die.GetCU()->GetFile(form_value.Unsigned())); 2248 break; 2249 case DW_AT_decl_line: 2250 decl.SetLine(form_value.Unsigned()); 2251 break; 2252 case DW_AT_decl_column: 2253 decl.SetColumn(form_value.Unsigned()); 2254 break; 2255 case DW_AT_sibling: 2256 break; 2257 } 2258 } 2259 } 2260 2261 if (name && name[0] && got_value) { 2262 m_ast.AddEnumerationValueToEnumerationType( 2263 clang_type, decl, name, enum_value, enumerator_byte_size * 8); 2264 ++enumerators_added; 2265 } 2266 } 2267 } 2268 } 2269 return enumerators_added; 2270 } 2271 2272 Function *DWARFASTParserClang::ParseFunctionFromDWARF(CompileUnit &comp_unit, 2273 const DWARFDIE &die) { 2274 DWARFRangeList func_ranges; 2275 const char *name = nullptr; 2276 const char *mangled = nullptr; 2277 int decl_file = 0; 2278 int decl_line = 0; 2279 int decl_column = 0; 2280 int call_file = 0; 2281 int call_line = 0; 2282 int call_column = 0; 2283 DWARFExpression frame_base; 2284 2285 const dw_tag_t tag = die.Tag(); 2286 2287 if (tag != DW_TAG_subprogram) 2288 return nullptr; 2289 2290 if (die.GetDIENamesAndRanges(name, mangled, func_ranges, decl_file, decl_line, 2291 decl_column, call_file, call_line, call_column, 2292 &frame_base)) { 2293 2294 // Union of all ranges in the function DIE (if the function is 2295 // discontiguous) 2296 AddressRange func_range; 2297 lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase(0); 2298 lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd(0); 2299 if (lowest_func_addr != LLDB_INVALID_ADDRESS && 2300 lowest_func_addr <= highest_func_addr) { 2301 ModuleSP module_sp(die.GetModule()); 2302 func_range.GetBaseAddress().ResolveAddressUsingFileSections( 2303 lowest_func_addr, module_sp->GetSectionList()); 2304 if (func_range.GetBaseAddress().IsValid()) 2305 func_range.SetByteSize(highest_func_addr - lowest_func_addr); 2306 } 2307 2308 if (func_range.GetBaseAddress().IsValid()) { 2309 Mangled func_name; 2310 if (mangled) 2311 func_name.SetValue(ConstString(mangled), true); 2312 else if ((die.GetParent().Tag() == DW_TAG_compile_unit || 2313 die.GetParent().Tag() == DW_TAG_partial_unit) && 2314 Language::LanguageIsCPlusPlus( 2315 SymbolFileDWARF::GetLanguage(*die.GetCU())) && 2316 !Language::LanguageIsObjC( 2317 SymbolFileDWARF::GetLanguage(*die.GetCU())) && 2318 name && strcmp(name, "main") != 0) { 2319 // If the mangled name is not present in the DWARF, generate the 2320 // demangled name using the decl context. We skip if the function is 2321 // "main" as its name is never mangled. 2322 bool is_static = false; 2323 bool is_variadic = false; 2324 bool has_template_params = false; 2325 unsigned type_quals = 0; 2326 std::vector<CompilerType> param_types; 2327 std::vector<clang::ParmVarDecl *> param_decls; 2328 StreamString sstr; 2329 2330 DWARFDeclContext decl_ctx = SymbolFileDWARF::GetDWARFDeclContext(die); 2331 sstr << decl_ctx.GetQualifiedName(); 2332 2333 clang::DeclContext *containing_decl_ctx = 2334 GetClangDeclContextContainingDIE(die, nullptr); 2335 ParseChildParameters(containing_decl_ctx, die, true, is_static, 2336 is_variadic, has_template_params, param_types, 2337 param_decls, type_quals); 2338 sstr << "("; 2339 for (size_t i = 0; i < param_types.size(); i++) { 2340 if (i > 0) 2341 sstr << ", "; 2342 sstr << param_types[i].GetTypeName(); 2343 } 2344 if (is_variadic) 2345 sstr << ", ..."; 2346 sstr << ")"; 2347 if (type_quals & clang::Qualifiers::Const) 2348 sstr << " const"; 2349 2350 func_name.SetValue(ConstString(sstr.GetString()), false); 2351 } else 2352 func_name.SetValue(ConstString(name), false); 2353 2354 FunctionSP func_sp; 2355 std::unique_ptr<Declaration> decl_up; 2356 if (decl_file != 0 || decl_line != 0 || decl_column != 0) 2357 decl_up.reset(new Declaration(die.GetCU()->GetFile(decl_file), 2358 decl_line, decl_column)); 2359 2360 SymbolFileDWARF *dwarf = die.GetDWARF(); 2361 // Supply the type _only_ if it has already been parsed 2362 Type *func_type = dwarf->GetDIEToType().lookup(die.GetDIE()); 2363 2364 assert(func_type == nullptr || func_type != DIE_IS_BEING_PARSED); 2365 2366 if (dwarf->FixupAddress(func_range.GetBaseAddress())) { 2367 const user_id_t func_user_id = die.GetID(); 2368 func_sp = 2369 std::make_shared<Function>(&comp_unit, 2370 func_user_id, // UserID is the DIE offset 2371 func_user_id, func_name, func_type, 2372 func_range); // first address range 2373 2374 if (func_sp.get() != nullptr) { 2375 if (frame_base.IsValid()) 2376 func_sp->GetFrameBaseExpression() = frame_base; 2377 comp_unit.AddFunction(func_sp); 2378 return func_sp.get(); 2379 } 2380 } 2381 } 2382 } 2383 return nullptr; 2384 } 2385 2386 void DWARFASTParserClang::ParseSingleMember( 2387 const DWARFDIE &die, const DWARFDIE &parent_die, 2388 lldb_private::CompilerType &class_clang_type, 2389 const lldb::LanguageType class_language, 2390 std::vector<int> &member_accessibilities, 2391 lldb::AccessType &default_accessibility, 2392 DelayedPropertyList &delayed_properties, 2393 lldb_private::ClangASTImporter::LayoutInfo &layout_info, 2394 FieldInfo &last_field_info) { 2395 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule(); 2396 const dw_tag_t tag = die.Tag(); 2397 // Get the parent byte size so we can verify any members will fit 2398 const uint64_t parent_byte_size = 2399 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, UINT64_MAX); 2400 const uint64_t parent_bit_size = 2401 parent_byte_size == UINT64_MAX ? UINT64_MAX : parent_byte_size * 8; 2402 2403 DWARFAttributes attributes; 2404 const size_t num_attributes = die.GetAttributes(attributes); 2405 if (num_attributes > 0) { 2406 const char *name = nullptr; 2407 const char *prop_name = nullptr; 2408 const char *prop_getter_name = nullptr; 2409 const char *prop_setter_name = nullptr; 2410 uint32_t prop_attributes = 0; 2411 2412 bool is_artificial = false; 2413 DWARFFormValue encoding_form; 2414 AccessType accessibility = eAccessNone; 2415 uint32_t member_byte_offset = 2416 (parent_die.Tag() == DW_TAG_union_type) ? 0 : UINT32_MAX; 2417 llvm::Optional<uint64_t> byte_size; 2418 int64_t bit_offset = 0; 2419 uint64_t data_bit_offset = UINT64_MAX; 2420 size_t bit_size = 0; 2421 bool is_external = 2422 false; // On DW_TAG_members, this means the member is static 2423 uint32_t i; 2424 for (i = 0; i < num_attributes && !is_artificial; ++i) { 2425 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2426 DWARFFormValue form_value; 2427 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2428 // DW_AT_data_member_location indicates the byte offset of the 2429 // word from the base address of the structure. 2430 // 2431 // DW_AT_bit_offset indicates how many bits into the word 2432 // (according to the host endianness) the low-order bit of the 2433 // field starts. AT_bit_offset can be negative. 2434 // 2435 // DW_AT_bit_size indicates the size of the field in bits. 2436 switch (attr) { 2437 case DW_AT_name: 2438 name = form_value.AsCString(); 2439 break; 2440 case DW_AT_type: 2441 encoding_form = form_value; 2442 break; 2443 case DW_AT_bit_offset: 2444 bit_offset = form_value.Signed(); 2445 break; 2446 case DW_AT_bit_size: 2447 bit_size = form_value.Unsigned(); 2448 break; 2449 case DW_AT_byte_size: 2450 byte_size = form_value.Unsigned(); 2451 break; 2452 case DW_AT_data_bit_offset: 2453 data_bit_offset = form_value.Unsigned(); 2454 break; 2455 case DW_AT_data_member_location: 2456 if (form_value.BlockData()) { 2457 Value initialValue(0); 2458 Value memberOffset(0); 2459 const DWARFDataExtractor &debug_info_data = die.GetData(); 2460 uint32_t block_length = form_value.Unsigned(); 2461 uint32_t block_offset = 2462 form_value.BlockData() - debug_info_data.GetDataStart(); 2463 if (DWARFExpression::Evaluate( 2464 nullptr, // ExecutionContext * 2465 nullptr, // RegisterContext * 2466 module_sp, 2467 DataExtractor(debug_info_data, block_offset, block_length), 2468 die.GetCU(), eRegisterKindDWARF, &initialValue, nullptr, 2469 memberOffset, nullptr)) { 2470 member_byte_offset = memberOffset.ResolveValue(nullptr).UInt(); 2471 } 2472 } else { 2473 // With DWARF 3 and later, if the value is an integer constant, 2474 // this form value is the offset in bytes from the beginning of 2475 // the containing entity. 2476 member_byte_offset = form_value.Unsigned(); 2477 } 2478 break; 2479 2480 case DW_AT_accessibility: 2481 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 2482 break; 2483 case DW_AT_artificial: 2484 is_artificial = form_value.Boolean(); 2485 break; 2486 case DW_AT_APPLE_property_name: 2487 prop_name = form_value.AsCString(); 2488 break; 2489 case DW_AT_APPLE_property_getter: 2490 prop_getter_name = form_value.AsCString(); 2491 break; 2492 case DW_AT_APPLE_property_setter: 2493 prop_setter_name = form_value.AsCString(); 2494 break; 2495 case DW_AT_APPLE_property_attribute: 2496 prop_attributes = form_value.Unsigned(); 2497 break; 2498 case DW_AT_external: 2499 is_external = form_value.Boolean(); 2500 break; 2501 2502 default: 2503 case DW_AT_declaration: 2504 case DW_AT_description: 2505 case DW_AT_mutable: 2506 case DW_AT_visibility: 2507 case DW_AT_sibling: 2508 break; 2509 } 2510 } 2511 } 2512 2513 if (prop_name) { 2514 ConstString fixed_setter; 2515 2516 // Check if the property getter/setter were provided as full names. 2517 // We want basenames, so we extract them. 2518 2519 if (prop_getter_name && prop_getter_name[0] == '-') { 2520 ObjCLanguage::MethodName prop_getter_method(prop_getter_name, true); 2521 prop_getter_name = prop_getter_method.GetSelector().GetCString(); 2522 } 2523 2524 if (prop_setter_name && prop_setter_name[0] == '-') { 2525 ObjCLanguage::MethodName prop_setter_method(prop_setter_name, true); 2526 prop_setter_name = prop_setter_method.GetSelector().GetCString(); 2527 } 2528 2529 // If the names haven't been provided, they need to be filled in. 2530 2531 if (!prop_getter_name) { 2532 prop_getter_name = prop_name; 2533 } 2534 if (!prop_setter_name && prop_name[0] && 2535 !(prop_attributes & DW_APPLE_PROPERTY_readonly)) { 2536 StreamString ss; 2537 2538 ss.Printf("set%c%s:", toupper(prop_name[0]), &prop_name[1]); 2539 2540 fixed_setter.SetString(ss.GetString()); 2541 prop_setter_name = fixed_setter.GetCString(); 2542 } 2543 } 2544 2545 // Clang has a DWARF generation bug where sometimes it represents 2546 // fields that are references with bad byte size and bit size/offset 2547 // information such as: 2548 // 2549 // DW_AT_byte_size( 0x00 ) 2550 // DW_AT_bit_size( 0x40 ) 2551 // DW_AT_bit_offset( 0xffffffffffffffc0 ) 2552 // 2553 // So check the bit offset to make sure it is sane, and if the values 2554 // are not sane, remove them. If we don't do this then we will end up 2555 // with a crash if we try to use this type in an expression when clang 2556 // becomes unhappy with its recycled debug info. 2557 2558 if (byte_size.getValueOr(0) == 0 && bit_offset < 0) { 2559 bit_size = 0; 2560 bit_offset = 0; 2561 } 2562 2563 // FIXME: Make Clang ignore Objective-C accessibility for expressions 2564 if (class_language == eLanguageTypeObjC || 2565 class_language == eLanguageTypeObjC_plus_plus) 2566 accessibility = eAccessNone; 2567 2568 // Handle static members 2569 if (is_external && member_byte_offset == UINT32_MAX) { 2570 Type *var_type = die.ResolveTypeUID(encoding_form.Reference()); 2571 2572 if (var_type) { 2573 if (accessibility == eAccessNone) 2574 accessibility = eAccessPublic; 2575 TypeSystemClang::AddVariableToRecordType( 2576 class_clang_type, name, var_type->GetLayoutCompilerType(), 2577 accessibility); 2578 } 2579 return; 2580 } 2581 2582 if (!is_artificial) { 2583 Type *member_type = die.ResolveTypeUID(encoding_form.Reference()); 2584 2585 clang::FieldDecl *field_decl = nullptr; 2586 const uint64_t character_width = 8; 2587 const uint64_t word_width = 32; 2588 if (tag == DW_TAG_member) { 2589 if (member_type) { 2590 CompilerType member_clang_type = member_type->GetLayoutCompilerType(); 2591 2592 if (accessibility == eAccessNone) 2593 accessibility = default_accessibility; 2594 member_accessibilities.push_back(accessibility); 2595 2596 uint64_t field_bit_offset = 2597 (member_byte_offset == UINT32_MAX ? 0 : (member_byte_offset * 8)); 2598 2599 if (bit_size > 0) { 2600 FieldInfo this_field_info; 2601 this_field_info.bit_offset = field_bit_offset; 2602 this_field_info.bit_size = bit_size; 2603 2604 if (data_bit_offset != UINT64_MAX) { 2605 this_field_info.bit_offset = data_bit_offset; 2606 } else { 2607 if (!byte_size) 2608 byte_size = member_type->GetByteSize(); 2609 2610 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 2611 if (objfile->GetByteOrder() == eByteOrderLittle) { 2612 this_field_info.bit_offset += byte_size.getValueOr(0) * 8; 2613 this_field_info.bit_offset -= (bit_offset + bit_size); 2614 } else { 2615 this_field_info.bit_offset += bit_offset; 2616 } 2617 } 2618 2619 if ((this_field_info.bit_offset >= parent_bit_size) || 2620 (last_field_info.IsBitfield() && 2621 !last_field_info.NextBitfieldOffsetIsValid( 2622 this_field_info.bit_offset))) { 2623 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 2624 objfile->GetModule()->ReportWarning( 2625 "0x%8.8" PRIx64 ": %s bitfield named \"%s\" has invalid " 2626 "bit offset (0x%8.8" PRIx64 2627 ") member will be ignored. Please file a bug against the " 2628 "compiler and include the preprocessed output for %s\n", 2629 die.GetID(), DW_TAG_value_to_name(tag), name, 2630 this_field_info.bit_offset, GetUnitName(parent_die).c_str()); 2631 return; 2632 } 2633 2634 // Update the field bit offset we will report for layout 2635 field_bit_offset = this_field_info.bit_offset; 2636 2637 // Objective-C has invalid DW_AT_bit_offset values in older 2638 // versions of clang, so we have to be careful and only insert 2639 // unnamed bitfields if we have a new enough clang. 2640 bool detect_unnamed_bitfields = true; 2641 2642 if (class_language == eLanguageTypeObjC || 2643 class_language == eLanguageTypeObjC_plus_plus) 2644 detect_unnamed_bitfields = 2645 die.GetCU()->Supports_unnamed_objc_bitfields(); 2646 2647 if (detect_unnamed_bitfields) { 2648 clang::Optional<FieldInfo> unnamed_field_info; 2649 uint64_t last_field_end = 0; 2650 2651 last_field_end = 2652 last_field_info.bit_offset + last_field_info.bit_size; 2653 2654 if (!last_field_info.IsBitfield()) { 2655 // The last field was not a bit-field... 2656 // but if it did take up the entire word then we need to extend 2657 // last_field_end so the bit-field does not step into the last 2658 // fields padding. 2659 if (last_field_end != 0 && ((last_field_end % word_width) != 0)) 2660 last_field_end += word_width - (last_field_end % word_width); 2661 } 2662 2663 // If we have a gap between the last_field_end and the current 2664 // field we have an unnamed bit-field. 2665 // If we have a base class, we assume there is no unnamed 2666 // bit-field if this is the first field since the gap can be 2667 // attributed to the members from the base class. This assumption 2668 // is not correct if the first field of the derived class is 2669 // indeed an unnamed bit-field. We currently do not have the 2670 // machinary to track the offset of the last field of classes we 2671 // have seen before, so we are not handling this case. 2672 if (this_field_info.bit_offset != last_field_end && 2673 this_field_info.bit_offset > last_field_end && 2674 !(last_field_info.bit_offset == 0 && 2675 last_field_info.bit_size == 0 && 2676 layout_info.base_offsets.size() != 0)) { 2677 unnamed_field_info = FieldInfo{}; 2678 unnamed_field_info->bit_size = 2679 this_field_info.bit_offset - last_field_end; 2680 unnamed_field_info->bit_offset = last_field_end; 2681 } 2682 2683 if (unnamed_field_info) { 2684 clang::FieldDecl *unnamed_bitfield_decl = 2685 TypeSystemClang::AddFieldToRecordType( 2686 class_clang_type, llvm::StringRef(), 2687 m_ast.GetBuiltinTypeForEncodingAndBitSize(eEncodingSint, 2688 word_width), 2689 accessibility, unnamed_field_info->bit_size); 2690 2691 layout_info.field_offsets.insert(std::make_pair( 2692 unnamed_bitfield_decl, unnamed_field_info->bit_offset)); 2693 } 2694 } 2695 2696 last_field_info = this_field_info; 2697 last_field_info.SetIsBitfield(true); 2698 } else { 2699 last_field_info.bit_offset = field_bit_offset; 2700 2701 if (llvm::Optional<uint64_t> clang_type_size = 2702 member_clang_type.GetByteSize(nullptr)) { 2703 last_field_info.bit_size = *clang_type_size * character_width; 2704 } 2705 2706 last_field_info.SetIsBitfield(false); 2707 } 2708 2709 if (!member_clang_type.IsCompleteType()) 2710 member_clang_type.GetCompleteType(); 2711 2712 { 2713 // Older versions of clang emit array[0] and array[1] in the 2714 // same way (<rdar://problem/12566646>). If the current field 2715 // is at the end of the structure, then there is definitely no 2716 // room for extra elements and we override the type to 2717 // array[0]. 2718 2719 CompilerType member_array_element_type; 2720 uint64_t member_array_size; 2721 bool member_array_is_incomplete; 2722 2723 if (member_clang_type.IsArrayType(&member_array_element_type, 2724 &member_array_size, 2725 &member_array_is_incomplete) && 2726 !member_array_is_incomplete) { 2727 uint64_t parent_byte_size = 2728 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 2729 UINT64_MAX); 2730 2731 if (member_byte_offset >= parent_byte_size) { 2732 if (member_array_size != 1 && 2733 (member_array_size != 0 || 2734 member_byte_offset > parent_byte_size)) { 2735 module_sp->ReportError( 2736 "0x%8.8" PRIx64 2737 ": DW_TAG_member '%s' refers to type 0x%8.8x" 2738 " which extends beyond the bounds of 0x%8.8" PRIx64, 2739 die.GetID(), name, encoding_form.Reference().GetOffset(), 2740 parent_die.GetID()); 2741 } 2742 2743 member_clang_type = 2744 m_ast.CreateArrayType(member_array_element_type, 0, false); 2745 } 2746 } 2747 } 2748 2749 if (TypeSystemClang::IsCXXClassType(member_clang_type) && 2750 !member_clang_type.GetCompleteType()) { 2751 if (die.GetCU()->GetProducer() == eProducerClang) 2752 module_sp->ReportError( 2753 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 2754 "0x%8.8x (%s) whose type is a forward declaration, not a " 2755 "complete definition.\nTry compiling the source file " 2756 "with -fstandalone-debug", 2757 parent_die.GetOffset(), parent_die.GetName(), die.GetOffset(), 2758 name); 2759 else 2760 module_sp->ReportError( 2761 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 2762 "0x%8.8x (%s) whose type is a forward declaration, not a " 2763 "complete definition.\nPlease file a bug against the " 2764 "compiler and include the preprocessed output for %s", 2765 parent_die.GetOffset(), parent_die.GetName(), die.GetOffset(), 2766 name, GetUnitName(parent_die).c_str()); 2767 // We have no choice other than to pretend that the member 2768 // class is complete. If we don't do this, clang will crash 2769 // when trying to layout the class. Since we provide layout 2770 // assistance, all ivars in this class and other classes will 2771 // be fine, this is the best we can do short of crashing. 2772 if (TypeSystemClang::StartTagDeclarationDefinition( 2773 member_clang_type)) { 2774 TypeSystemClang::CompleteTagDeclarationDefinition( 2775 member_clang_type); 2776 } else { 2777 module_sp->ReportError( 2778 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 2779 "0x%8.8x (%s) whose type claims to be a C++ class but we " 2780 "were not able to start its definition.\nPlease file a " 2781 "bug and attach the file at the start of this error " 2782 "message", 2783 parent_die.GetOffset(), parent_die.GetName(), die.GetOffset(), 2784 name); 2785 } 2786 } 2787 2788 field_decl = TypeSystemClang::AddFieldToRecordType( 2789 class_clang_type, name, member_clang_type, accessibility, 2790 bit_size); 2791 2792 m_ast.SetMetadataAsUserID(field_decl, die.GetID()); 2793 2794 layout_info.field_offsets.insert( 2795 std::make_pair(field_decl, field_bit_offset)); 2796 } else { 2797 if (name) 2798 module_sp->ReportError( 2799 "0x%8.8" PRIx64 ": DW_TAG_member '%s' refers to type 0x%8.8x" 2800 " which was unable to be parsed", 2801 die.GetID(), name, encoding_form.Reference().GetOffset()); 2802 else 2803 module_sp->ReportError( 2804 "0x%8.8" PRIx64 ": DW_TAG_member refers to type 0x%8.8x" 2805 " which was unable to be parsed", 2806 die.GetID(), encoding_form.Reference().GetOffset()); 2807 } 2808 } 2809 2810 if (prop_name != nullptr && member_type) { 2811 clang::ObjCIvarDecl *ivar_decl = nullptr; 2812 2813 if (field_decl) { 2814 ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl); 2815 assert(ivar_decl != nullptr); 2816 } 2817 2818 ClangASTMetadata metadata; 2819 metadata.SetUserID(die.GetID()); 2820 delayed_properties.push_back(DelayedAddObjCClassProperty( 2821 class_clang_type, prop_name, member_type->GetLayoutCompilerType(), 2822 ivar_decl, prop_setter_name, prop_getter_name, prop_attributes, 2823 &metadata)); 2824 2825 if (ivar_decl) 2826 m_ast.SetMetadataAsUserID(ivar_decl, die.GetID()); 2827 } 2828 } 2829 } 2830 } 2831 2832 bool DWARFASTParserClang::ParseChildMembers( 2833 const DWARFDIE &parent_die, CompilerType &class_clang_type, 2834 const LanguageType class_language, 2835 std::vector<std::unique_ptr<clang::CXXBaseSpecifier>> &base_classes, 2836 std::vector<int> &member_accessibilities, 2837 std::vector<DWARFDIE> &member_function_dies, 2838 DelayedPropertyList &delayed_properties, AccessType &default_accessibility, 2839 bool &is_a_class, ClangASTImporter::LayoutInfo &layout_info) { 2840 if (!parent_die) 2841 return false; 2842 2843 FieldInfo last_field_info; 2844 2845 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule(); 2846 TypeSystemClang *ast = 2847 llvm::dyn_cast_or_null<TypeSystemClang>(class_clang_type.GetTypeSystem()); 2848 if (ast == nullptr) 2849 return false; 2850 2851 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2852 die = die.GetSibling()) { 2853 dw_tag_t tag = die.Tag(); 2854 2855 switch (tag) { 2856 case DW_TAG_member: 2857 case DW_TAG_APPLE_property: 2858 ParseSingleMember(die, parent_die, class_clang_type, class_language, 2859 member_accessibilities, default_accessibility, 2860 delayed_properties, layout_info, last_field_info); 2861 break; 2862 2863 case DW_TAG_subprogram: 2864 // Let the type parsing code handle this one for us. 2865 member_function_dies.push_back(die); 2866 break; 2867 2868 case DW_TAG_inheritance: { 2869 is_a_class = true; 2870 if (default_accessibility == eAccessNone) 2871 default_accessibility = eAccessPrivate; 2872 // TODO: implement DW_TAG_inheritance type parsing 2873 DWARFAttributes attributes; 2874 const size_t num_attributes = die.GetAttributes(attributes); 2875 if (num_attributes > 0) { 2876 DWARFFormValue encoding_form; 2877 AccessType accessibility = default_accessibility; 2878 bool is_virtual = false; 2879 bool is_base_of_class = true; 2880 off_t member_byte_offset = 0; 2881 uint32_t i; 2882 for (i = 0; i < num_attributes; ++i) { 2883 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2884 DWARFFormValue form_value; 2885 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2886 switch (attr) { 2887 case DW_AT_type: 2888 encoding_form = form_value; 2889 break; 2890 case DW_AT_data_member_location: 2891 if (form_value.BlockData()) { 2892 Value initialValue(0); 2893 Value memberOffset(0); 2894 const DWARFDataExtractor &debug_info_data = die.GetData(); 2895 uint32_t block_length = form_value.Unsigned(); 2896 uint32_t block_offset = 2897 form_value.BlockData() - debug_info_data.GetDataStart(); 2898 if (DWARFExpression::Evaluate( 2899 nullptr, nullptr, module_sp, 2900 DataExtractor(debug_info_data, block_offset, 2901 block_length), 2902 die.GetCU(), eRegisterKindDWARF, &initialValue, nullptr, 2903 memberOffset, nullptr)) { 2904 member_byte_offset = 2905 memberOffset.ResolveValue(nullptr).UInt(); 2906 } 2907 } else { 2908 // With DWARF 3 and later, if the value is an integer constant, 2909 // this form value is the offset in bytes from the beginning of 2910 // the containing entity. 2911 member_byte_offset = form_value.Unsigned(); 2912 } 2913 break; 2914 2915 case DW_AT_accessibility: 2916 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 2917 break; 2918 2919 case DW_AT_virtuality: 2920 is_virtual = form_value.Boolean(); 2921 break; 2922 2923 case DW_AT_sibling: 2924 break; 2925 2926 default: 2927 break; 2928 } 2929 } 2930 } 2931 2932 Type *base_class_type = die.ResolveTypeUID(encoding_form.Reference()); 2933 if (base_class_type == nullptr) { 2934 module_sp->ReportError("0x%8.8x: DW_TAG_inheritance failed to " 2935 "resolve the base class at 0x%8.8x" 2936 " from enclosing type 0x%8.8x. \nPlease file " 2937 "a bug and attach the file at the start of " 2938 "this error message", 2939 die.GetOffset(), 2940 encoding_form.Reference().GetOffset(), 2941 parent_die.GetOffset()); 2942 break; 2943 } 2944 2945 CompilerType base_class_clang_type = 2946 base_class_type->GetFullCompilerType(); 2947 assert(base_class_clang_type); 2948 if (class_language == eLanguageTypeObjC) { 2949 ast->SetObjCSuperClass(class_clang_type, base_class_clang_type); 2950 } else { 2951 std::unique_ptr<clang::CXXBaseSpecifier> result = 2952 ast->CreateBaseClassSpecifier( 2953 base_class_clang_type.GetOpaqueQualType(), accessibility, 2954 is_virtual, is_base_of_class); 2955 if (!result) 2956 break; 2957 2958 base_classes.push_back(std::move(result)); 2959 2960 if (is_virtual) { 2961 // Do not specify any offset for virtual inheritance. The DWARF 2962 // produced by clang doesn't give us a constant offset, but gives 2963 // us a DWARF expressions that requires an actual object in memory. 2964 // the DW_AT_data_member_location for a virtual base class looks 2965 // like: 2966 // DW_AT_data_member_location( DW_OP_dup, DW_OP_deref, 2967 // DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref, 2968 // DW_OP_plus ) 2969 // Given this, there is really no valid response we can give to 2970 // clang for virtual base class offsets, and this should eventually 2971 // be removed from LayoutRecordType() in the external 2972 // AST source in clang. 2973 } else { 2974 layout_info.base_offsets.insert(std::make_pair( 2975 ast->GetAsCXXRecordDecl( 2976 base_class_clang_type.GetOpaqueQualType()), 2977 clang::CharUnits::fromQuantity(member_byte_offset))); 2978 } 2979 } 2980 } 2981 } break; 2982 2983 default: 2984 break; 2985 } 2986 } 2987 2988 return true; 2989 } 2990 2991 size_t DWARFASTParserClang::ParseChildParameters( 2992 clang::DeclContext *containing_decl_ctx, const DWARFDIE &parent_die, 2993 bool skip_artificial, bool &is_static, bool &is_variadic, 2994 bool &has_template_params, std::vector<CompilerType> &function_param_types, 2995 std::vector<clang::ParmVarDecl *> &function_param_decls, 2996 unsigned &type_quals) { 2997 if (!parent_die) 2998 return 0; 2999 3000 size_t arg_idx = 0; 3001 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 3002 die = die.GetSibling()) { 3003 const dw_tag_t tag = die.Tag(); 3004 switch (tag) { 3005 case DW_TAG_formal_parameter: { 3006 DWARFAttributes attributes; 3007 const size_t num_attributes = die.GetAttributes(attributes); 3008 if (num_attributes > 0) { 3009 const char *name = nullptr; 3010 DWARFFormValue param_type_die_form; 3011 bool is_artificial = false; 3012 // one of None, Auto, Register, Extern, Static, PrivateExtern 3013 3014 clang::StorageClass storage = clang::SC_None; 3015 uint32_t i; 3016 for (i = 0; i < num_attributes; ++i) { 3017 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3018 DWARFFormValue form_value; 3019 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3020 switch (attr) { 3021 case DW_AT_name: 3022 name = form_value.AsCString(); 3023 break; 3024 case DW_AT_type: 3025 param_type_die_form = form_value; 3026 break; 3027 case DW_AT_artificial: 3028 is_artificial = form_value.Boolean(); 3029 break; 3030 case DW_AT_location: 3031 case DW_AT_const_value: 3032 case DW_AT_default_value: 3033 case DW_AT_description: 3034 case DW_AT_endianity: 3035 case DW_AT_is_optional: 3036 case DW_AT_segment: 3037 case DW_AT_variable_parameter: 3038 default: 3039 case DW_AT_abstract_origin: 3040 case DW_AT_sibling: 3041 break; 3042 } 3043 } 3044 } 3045 3046 bool skip = false; 3047 if (skip_artificial && is_artificial) { 3048 // In order to determine if a C++ member function is "const" we 3049 // have to look at the const-ness of "this"... 3050 if (arg_idx == 0 && 3051 DeclKindIsCXXClass(containing_decl_ctx->getDeclKind()) && 3052 // Often times compilers omit the "this" name for the 3053 // specification DIEs, so we can't rely upon the name being in 3054 // the formal parameter DIE... 3055 (name == nullptr || ::strcmp(name, "this") == 0)) { 3056 Type *this_type = 3057 die.ResolveTypeUID(param_type_die_form.Reference()); 3058 if (this_type) { 3059 uint32_t encoding_mask = this_type->GetEncodingMask(); 3060 if (encoding_mask & Type::eEncodingIsPointerUID) { 3061 is_static = false; 3062 3063 if (encoding_mask & (1u << Type::eEncodingIsConstUID)) 3064 type_quals |= clang::Qualifiers::Const; 3065 if (encoding_mask & (1u << Type::eEncodingIsVolatileUID)) 3066 type_quals |= clang::Qualifiers::Volatile; 3067 } 3068 } 3069 } 3070 skip = true; 3071 } 3072 3073 if (!skip) { 3074 Type *type = die.ResolveTypeUID(param_type_die_form.Reference()); 3075 if (type) { 3076 function_param_types.push_back(type->GetForwardCompilerType()); 3077 3078 clang::ParmVarDecl *param_var_decl = 3079 m_ast.CreateParameterDeclaration( 3080 containing_decl_ctx, GetOwningClangModule(die), name, 3081 type->GetForwardCompilerType(), storage); 3082 assert(param_var_decl); 3083 function_param_decls.push_back(param_var_decl); 3084 3085 m_ast.SetMetadataAsUserID(param_var_decl, die.GetID()); 3086 } 3087 } 3088 } 3089 arg_idx++; 3090 } break; 3091 3092 case DW_TAG_unspecified_parameters: 3093 is_variadic = true; 3094 break; 3095 3096 case DW_TAG_template_type_parameter: 3097 case DW_TAG_template_value_parameter: 3098 case DW_TAG_GNU_template_parameter_pack: 3099 // The one caller of this was never using the template_param_infos, and 3100 // the local variable was taking up a large amount of stack space in 3101 // SymbolFileDWARF::ParseType() so this was removed. If we ever need the 3102 // template params back, we can add them back. 3103 // ParseTemplateDIE (dwarf_cu, die, template_param_infos); 3104 has_template_params = true; 3105 break; 3106 3107 default: 3108 break; 3109 } 3110 } 3111 return arg_idx; 3112 } 3113 3114 llvm::Optional<SymbolFile::ArrayInfo> 3115 DWARFASTParser::ParseChildArrayInfo(const DWARFDIE &parent_die, 3116 const ExecutionContext *exe_ctx) { 3117 SymbolFile::ArrayInfo array_info; 3118 if (!parent_die) 3119 return llvm::None; 3120 3121 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 3122 die = die.GetSibling()) { 3123 const dw_tag_t tag = die.Tag(); 3124 switch (tag) { 3125 case DW_TAG_subrange_type: { 3126 DWARFAttributes attributes; 3127 const size_t num_child_attributes = die.GetAttributes(attributes); 3128 if (num_child_attributes > 0) { 3129 uint64_t num_elements = 0; 3130 uint64_t lower_bound = 0; 3131 uint64_t upper_bound = 0; 3132 bool upper_bound_valid = false; 3133 uint32_t i; 3134 for (i = 0; i < num_child_attributes; ++i) { 3135 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3136 DWARFFormValue form_value; 3137 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3138 switch (attr) { 3139 case DW_AT_name: 3140 break; 3141 3142 case DW_AT_count: 3143 if (DWARFDIE var_die = die.GetReferencedDIE(DW_AT_count)) { 3144 if (var_die.Tag() == DW_TAG_variable) 3145 if (exe_ctx) { 3146 if (auto frame = exe_ctx->GetFrameSP()) { 3147 Status error; 3148 lldb::VariableSP var_sp; 3149 auto valobj_sp = frame->GetValueForVariableExpressionPath( 3150 var_die.GetName(), eNoDynamicValues, 0, var_sp, 3151 error); 3152 if (valobj_sp) { 3153 num_elements = valobj_sp->GetValueAsUnsigned(0); 3154 break; 3155 } 3156 } 3157 } 3158 } else 3159 num_elements = form_value.Unsigned(); 3160 break; 3161 3162 case DW_AT_bit_stride: 3163 array_info.bit_stride = form_value.Unsigned(); 3164 break; 3165 3166 case DW_AT_byte_stride: 3167 array_info.byte_stride = form_value.Unsigned(); 3168 break; 3169 3170 case DW_AT_lower_bound: 3171 lower_bound = form_value.Unsigned(); 3172 break; 3173 3174 case DW_AT_upper_bound: 3175 upper_bound_valid = true; 3176 upper_bound = form_value.Unsigned(); 3177 break; 3178 3179 default: 3180 case DW_AT_abstract_origin: 3181 case DW_AT_accessibility: 3182 case DW_AT_allocated: 3183 case DW_AT_associated: 3184 case DW_AT_data_location: 3185 case DW_AT_declaration: 3186 case DW_AT_description: 3187 case DW_AT_sibling: 3188 case DW_AT_threads_scaled: 3189 case DW_AT_type: 3190 case DW_AT_visibility: 3191 break; 3192 } 3193 } 3194 } 3195 3196 if (num_elements == 0) { 3197 if (upper_bound_valid && upper_bound >= lower_bound) 3198 num_elements = upper_bound - lower_bound + 1; 3199 } 3200 3201 array_info.element_orders.push_back(num_elements); 3202 } 3203 } break; 3204 default: 3205 break; 3206 } 3207 } 3208 return array_info; 3209 } 3210 3211 Type *DWARFASTParserClang::GetTypeForDIE(const DWARFDIE &die) { 3212 if (die) { 3213 SymbolFileDWARF *dwarf = die.GetDWARF(); 3214 DWARFAttributes attributes; 3215 const size_t num_attributes = die.GetAttributes(attributes); 3216 if (num_attributes > 0) { 3217 DWARFFormValue type_die_form; 3218 for (size_t i = 0; i < num_attributes; ++i) { 3219 dw_attr_t attr = attributes.AttributeAtIndex(i); 3220 DWARFFormValue form_value; 3221 3222 if (attr == DW_AT_type && 3223 attributes.ExtractFormValueAtIndex(i, form_value)) 3224 return dwarf->ResolveTypeUID(form_value.Reference(), true); 3225 } 3226 } 3227 } 3228 3229 return nullptr; 3230 } 3231 3232 clang::Decl *DWARFASTParserClang::GetClangDeclForDIE(const DWARFDIE &die) { 3233 if (!die) 3234 return nullptr; 3235 3236 switch (die.Tag()) { 3237 case DW_TAG_variable: 3238 case DW_TAG_constant: 3239 case DW_TAG_formal_parameter: 3240 case DW_TAG_imported_declaration: 3241 case DW_TAG_imported_module: 3242 break; 3243 default: 3244 return nullptr; 3245 } 3246 3247 DIEToDeclMap::iterator cache_pos = m_die_to_decl.find(die.GetDIE()); 3248 if (cache_pos != m_die_to_decl.end()) 3249 return cache_pos->second; 3250 3251 if (DWARFDIE spec_die = die.GetReferencedDIE(DW_AT_specification)) { 3252 clang::Decl *decl = GetClangDeclForDIE(spec_die); 3253 m_die_to_decl[die.GetDIE()] = decl; 3254 m_decl_to_die[decl].insert(die.GetDIE()); 3255 return decl; 3256 } 3257 3258 if (DWARFDIE abstract_origin_die = 3259 die.GetReferencedDIE(DW_AT_abstract_origin)) { 3260 clang::Decl *decl = GetClangDeclForDIE(abstract_origin_die); 3261 m_die_to_decl[die.GetDIE()] = decl; 3262 m_decl_to_die[decl].insert(die.GetDIE()); 3263 return decl; 3264 } 3265 3266 clang::Decl *decl = nullptr; 3267 switch (die.Tag()) { 3268 case DW_TAG_variable: 3269 case DW_TAG_constant: 3270 case DW_TAG_formal_parameter: { 3271 SymbolFileDWARF *dwarf = die.GetDWARF(); 3272 Type *type = GetTypeForDIE(die); 3273 if (dwarf && type) { 3274 const char *name = die.GetName(); 3275 clang::DeclContext *decl_context = 3276 TypeSystemClang::DeclContextGetAsDeclContext( 3277 dwarf->GetDeclContextContainingUID(die.GetID())); 3278 decl = m_ast.CreateVariableDeclaration( 3279 decl_context, GetOwningClangModule(die), name, 3280 ClangUtil::GetQualType(type->GetForwardCompilerType())); 3281 } 3282 break; 3283 } 3284 case DW_TAG_imported_declaration: { 3285 SymbolFileDWARF *dwarf = die.GetDWARF(); 3286 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3287 if (imported_uid) { 3288 CompilerDecl imported_decl = SymbolFileDWARF::GetDecl(imported_uid); 3289 if (imported_decl) { 3290 clang::DeclContext *decl_context = 3291 TypeSystemClang::DeclContextGetAsDeclContext( 3292 dwarf->GetDeclContextContainingUID(die.GetID())); 3293 if (clang::NamedDecl *clang_imported_decl = 3294 llvm::dyn_cast<clang::NamedDecl>( 3295 (clang::Decl *)imported_decl.GetOpaqueDecl())) 3296 decl = m_ast.CreateUsingDeclaration( 3297 decl_context, OptionalClangModuleID(), clang_imported_decl); 3298 } 3299 } 3300 break; 3301 } 3302 case DW_TAG_imported_module: { 3303 SymbolFileDWARF *dwarf = die.GetDWARF(); 3304 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3305 3306 if (imported_uid) { 3307 CompilerDeclContext imported_decl_ctx = 3308 SymbolFileDWARF::GetDeclContext(imported_uid); 3309 if (imported_decl_ctx) { 3310 clang::DeclContext *decl_context = 3311 TypeSystemClang::DeclContextGetAsDeclContext( 3312 dwarf->GetDeclContextContainingUID(die.GetID())); 3313 if (clang::NamespaceDecl *ns_decl = 3314 TypeSystemClang::DeclContextGetAsNamespaceDecl( 3315 imported_decl_ctx)) 3316 decl = m_ast.CreateUsingDirectiveDeclaration( 3317 decl_context, OptionalClangModuleID(), ns_decl); 3318 } 3319 } 3320 break; 3321 } 3322 default: 3323 break; 3324 } 3325 3326 m_die_to_decl[die.GetDIE()] = decl; 3327 m_decl_to_die[decl].insert(die.GetDIE()); 3328 3329 return decl; 3330 } 3331 3332 clang::DeclContext * 3333 DWARFASTParserClang::GetClangDeclContextForDIE(const DWARFDIE &die) { 3334 if (die) { 3335 clang::DeclContext *decl_ctx = GetCachedClangDeclContextForDIE(die); 3336 if (decl_ctx) 3337 return decl_ctx; 3338 3339 bool try_parsing_type = true; 3340 switch (die.Tag()) { 3341 case DW_TAG_compile_unit: 3342 case DW_TAG_partial_unit: 3343 decl_ctx = m_ast.GetTranslationUnitDecl(); 3344 try_parsing_type = false; 3345 break; 3346 3347 case DW_TAG_namespace: 3348 decl_ctx = ResolveNamespaceDIE(die); 3349 try_parsing_type = false; 3350 break; 3351 3352 case DW_TAG_lexical_block: 3353 decl_ctx = GetDeclContextForBlock(die); 3354 try_parsing_type = false; 3355 break; 3356 3357 default: 3358 break; 3359 } 3360 3361 if (decl_ctx == nullptr && try_parsing_type) { 3362 Type *type = die.GetDWARF()->ResolveType(die); 3363 if (type) 3364 decl_ctx = GetCachedClangDeclContextForDIE(die); 3365 } 3366 3367 if (decl_ctx) { 3368 LinkDeclContextToDIE(decl_ctx, die); 3369 return decl_ctx; 3370 } 3371 } 3372 return nullptr; 3373 } 3374 3375 OptionalClangModuleID 3376 DWARFASTParserClang::GetOwningClangModule(const DWARFDIE &die) { 3377 if (!die.IsValid()) 3378 return {}; 3379 3380 for (DWARFDIE parent = die.GetParent(); parent.IsValid(); 3381 parent = parent.GetParent()) { 3382 const dw_tag_t tag = parent.Tag(); 3383 if (tag == DW_TAG_module) { 3384 DWARFDIE module_die = parent; 3385 auto it = m_die_to_module.find(module_die.GetDIE()); 3386 if (it != m_die_to_module.end()) 3387 return it->second; 3388 const char *name = module_die.GetAttributeValueAsString(DW_AT_name, 0); 3389 if (!name) 3390 return {}; 3391 3392 OptionalClangModuleID id = 3393 m_ast.GetOrCreateClangModule(name, GetOwningClangModule(module_die)); 3394 m_die_to_module.insert({module_die.GetDIE(), id}); 3395 return id; 3396 } 3397 } 3398 return {}; 3399 } 3400 3401 static bool IsSubroutine(const DWARFDIE &die) { 3402 switch (die.Tag()) { 3403 case DW_TAG_subprogram: 3404 case DW_TAG_inlined_subroutine: 3405 return true; 3406 default: 3407 return false; 3408 } 3409 } 3410 3411 static DWARFDIE GetContainingFunctionWithAbstractOrigin(const DWARFDIE &die) { 3412 for (DWARFDIE candidate = die; candidate; candidate = candidate.GetParent()) { 3413 if (IsSubroutine(candidate)) { 3414 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3415 return candidate; 3416 } else { 3417 return DWARFDIE(); 3418 } 3419 } 3420 } 3421 assert(0 && "Shouldn't call GetContainingFunctionWithAbstractOrigin on " 3422 "something not in a function"); 3423 return DWARFDIE(); 3424 } 3425 3426 static DWARFDIE FindAnyChildWithAbstractOrigin(const DWARFDIE &context) { 3427 for (DWARFDIE candidate = context.GetFirstChild(); candidate.IsValid(); 3428 candidate = candidate.GetSibling()) { 3429 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3430 return candidate; 3431 } 3432 } 3433 return DWARFDIE(); 3434 } 3435 3436 static DWARFDIE FindFirstChildWithAbstractOrigin(const DWARFDIE &block, 3437 const DWARFDIE &function) { 3438 assert(IsSubroutine(function)); 3439 for (DWARFDIE context = block; context != function.GetParent(); 3440 context = context.GetParent()) { 3441 assert(!IsSubroutine(context) || context == function); 3442 if (DWARFDIE child = FindAnyChildWithAbstractOrigin(context)) { 3443 return child; 3444 } 3445 } 3446 return DWARFDIE(); 3447 } 3448 3449 clang::DeclContext * 3450 DWARFASTParserClang::GetDeclContextForBlock(const DWARFDIE &die) { 3451 assert(die.Tag() == DW_TAG_lexical_block); 3452 DWARFDIE containing_function_with_abstract_origin = 3453 GetContainingFunctionWithAbstractOrigin(die); 3454 if (!containing_function_with_abstract_origin) { 3455 return (clang::DeclContext *)ResolveBlockDIE(die); 3456 } 3457 DWARFDIE child = FindFirstChildWithAbstractOrigin( 3458 die, containing_function_with_abstract_origin); 3459 CompilerDeclContext decl_context = 3460 GetDeclContextContainingUIDFromDWARF(child); 3461 return (clang::DeclContext *)decl_context.GetOpaqueDeclContext(); 3462 } 3463 3464 clang::BlockDecl *DWARFASTParserClang::ResolveBlockDIE(const DWARFDIE &die) { 3465 if (die && die.Tag() == DW_TAG_lexical_block) { 3466 clang::BlockDecl *decl = 3467 llvm::cast_or_null<clang::BlockDecl>(m_die_to_decl_ctx[die.GetDIE()]); 3468 3469 if (!decl) { 3470 DWARFDIE decl_context_die; 3471 clang::DeclContext *decl_context = 3472 GetClangDeclContextContainingDIE(die, &decl_context_die); 3473 decl = 3474 m_ast.CreateBlockDeclaration(decl_context, GetOwningClangModule(die)); 3475 3476 if (decl) 3477 LinkDeclContextToDIE((clang::DeclContext *)decl, die); 3478 } 3479 3480 return decl; 3481 } 3482 return nullptr; 3483 } 3484 3485 clang::NamespaceDecl * 3486 DWARFASTParserClang::ResolveNamespaceDIE(const DWARFDIE &die) { 3487 if (die && die.Tag() == DW_TAG_namespace) { 3488 // See if we already parsed this namespace DIE and associated it with a 3489 // uniqued namespace declaration 3490 clang::NamespaceDecl *namespace_decl = 3491 static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die.GetDIE()]); 3492 if (namespace_decl) 3493 return namespace_decl; 3494 else { 3495 const char *namespace_name = die.GetName(); 3496 clang::DeclContext *containing_decl_ctx = 3497 GetClangDeclContextContainingDIE(die, nullptr); 3498 bool is_inline = 3499 die.GetAttributeValueAsUnsigned(DW_AT_export_symbols, 0) != 0; 3500 3501 namespace_decl = m_ast.GetUniqueNamespaceDeclaration( 3502 namespace_name, containing_decl_ctx, GetOwningClangModule(die), 3503 is_inline); 3504 Log *log = 3505 nullptr; // (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 3506 if (log) { 3507 SymbolFileDWARF *dwarf = die.GetDWARF(); 3508 if (namespace_name) { 3509 dwarf->GetObjectFile()->GetModule()->LogMessage( 3510 log, 3511 "ASTContext => %p: 0x%8.8" PRIx64 3512 ": DW_TAG_namespace with DW_AT_name(\"%s\") => " 3513 "clang::NamespaceDecl *%p (original = %p)", 3514 static_cast<void *>(&m_ast.getASTContext()), die.GetID(), 3515 namespace_name, static_cast<void *>(namespace_decl), 3516 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3517 } else { 3518 dwarf->GetObjectFile()->GetModule()->LogMessage( 3519 log, 3520 "ASTContext => %p: 0x%8.8" PRIx64 3521 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p " 3522 "(original = %p)", 3523 static_cast<void *>(&m_ast.getASTContext()), die.GetID(), 3524 static_cast<void *>(namespace_decl), 3525 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3526 } 3527 } 3528 3529 if (namespace_decl) 3530 LinkDeclContextToDIE((clang::DeclContext *)namespace_decl, die); 3531 return namespace_decl; 3532 } 3533 } 3534 return nullptr; 3535 } 3536 3537 clang::DeclContext *DWARFASTParserClang::GetClangDeclContextContainingDIE( 3538 const DWARFDIE &die, DWARFDIE *decl_ctx_die_copy) { 3539 SymbolFileDWARF *dwarf = die.GetDWARF(); 3540 3541 DWARFDIE decl_ctx_die = dwarf->GetDeclContextDIEContainingDIE(die); 3542 3543 if (decl_ctx_die_copy) 3544 *decl_ctx_die_copy = decl_ctx_die; 3545 3546 if (decl_ctx_die) { 3547 clang::DeclContext *clang_decl_ctx = 3548 GetClangDeclContextForDIE(decl_ctx_die); 3549 if (clang_decl_ctx) 3550 return clang_decl_ctx; 3551 } 3552 return m_ast.GetTranslationUnitDecl(); 3553 } 3554 3555 clang::DeclContext * 3556 DWARFASTParserClang::GetCachedClangDeclContextForDIE(const DWARFDIE &die) { 3557 if (die) { 3558 DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find(die.GetDIE()); 3559 if (pos != m_die_to_decl_ctx.end()) 3560 return pos->second; 3561 } 3562 return nullptr; 3563 } 3564 3565 void DWARFASTParserClang::LinkDeclContextToDIE(clang::DeclContext *decl_ctx, 3566 const DWARFDIE &die) { 3567 m_die_to_decl_ctx[die.GetDIE()] = decl_ctx; 3568 // There can be many DIEs for a single decl context 3569 // m_decl_ctx_to_die[decl_ctx].insert(die.GetDIE()); 3570 m_decl_ctx_to_die.insert(std::make_pair(decl_ctx, die)); 3571 } 3572 3573 bool DWARFASTParserClang::CopyUniqueClassMethodTypes( 3574 const DWARFDIE &src_class_die, const DWARFDIE &dst_class_die, 3575 lldb_private::Type *class_type, std::vector<DWARFDIE> &failures) { 3576 if (!class_type || !src_class_die || !dst_class_die) 3577 return false; 3578 if (src_class_die.Tag() != dst_class_die.Tag()) 3579 return false; 3580 3581 // We need to complete the class type so we can get all of the method types 3582 // parsed so we can then unique those types to their equivalent counterparts 3583 // in "dst_cu" and "dst_class_die" 3584 class_type->GetFullCompilerType(); 3585 3586 DWARFDIE src_die; 3587 DWARFDIE dst_die; 3588 UniqueCStringMap<DWARFDIE> src_name_to_die; 3589 UniqueCStringMap<DWARFDIE> dst_name_to_die; 3590 UniqueCStringMap<DWARFDIE> src_name_to_die_artificial; 3591 UniqueCStringMap<DWARFDIE> dst_name_to_die_artificial; 3592 for (src_die = src_class_die.GetFirstChild(); src_die.IsValid(); 3593 src_die = src_die.GetSibling()) { 3594 if (src_die.Tag() == DW_TAG_subprogram) { 3595 // Make sure this is a declaration and not a concrete instance by looking 3596 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3597 // are placed inside the class definitions and shouldn't be included in 3598 // the list of things are are tracking here. 3599 if (src_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 3600 const char *src_name = src_die.GetMangledName(); 3601 if (src_name) { 3602 ConstString src_const_name(src_name); 3603 if (src_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3604 src_name_to_die_artificial.Append(src_const_name, src_die); 3605 else 3606 src_name_to_die.Append(src_const_name, src_die); 3607 } 3608 } 3609 } 3610 } 3611 for (dst_die = dst_class_die.GetFirstChild(); dst_die.IsValid(); 3612 dst_die = dst_die.GetSibling()) { 3613 if (dst_die.Tag() == DW_TAG_subprogram) { 3614 // Make sure this is a declaration and not a concrete instance by looking 3615 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3616 // are placed inside the class definitions and shouldn't be included in 3617 // the list of things are are tracking here. 3618 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 3619 const char *dst_name = dst_die.GetMangledName(); 3620 if (dst_name) { 3621 ConstString dst_const_name(dst_name); 3622 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3623 dst_name_to_die_artificial.Append(dst_const_name, dst_die); 3624 else 3625 dst_name_to_die.Append(dst_const_name, dst_die); 3626 } 3627 } 3628 } 3629 } 3630 const uint32_t src_size = src_name_to_die.GetSize(); 3631 const uint32_t dst_size = dst_name_to_die.GetSize(); 3632 Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | 3633 // DWARF_LOG_TYPE_COMPLETION)); 3634 3635 // Is everything kosher so we can go through the members at top speed? 3636 bool fast_path = true; 3637 3638 if (src_size != dst_size) { 3639 if (src_size != 0 && dst_size != 0) { 3640 LLDB_LOGF(log, 3641 "warning: trying to unique class DIE 0x%8.8x to 0x%8.8x, " 3642 "but they didn't have the same size (src=%d, dst=%d)", 3643 src_class_die.GetOffset(), dst_class_die.GetOffset(), src_size, 3644 dst_size); 3645 } 3646 3647 fast_path = false; 3648 } 3649 3650 uint32_t idx; 3651 3652 if (fast_path) { 3653 for (idx = 0; idx < src_size; ++idx) { 3654 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 3655 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3656 3657 if (src_die.Tag() != dst_die.Tag()) { 3658 LLDB_LOGF(log, 3659 "warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 3660 "but 0x%8.8x (%s) tags didn't match 0x%8.8x (%s)", 3661 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3662 src_die.GetOffset(), src_die.GetTagAsCString(), 3663 dst_die.GetOffset(), dst_die.GetTagAsCString()); 3664 fast_path = false; 3665 } 3666 3667 const char *src_name = src_die.GetMangledName(); 3668 const char *dst_name = dst_die.GetMangledName(); 3669 3670 // Make sure the names match 3671 if (src_name == dst_name || (strcmp(src_name, dst_name) == 0)) 3672 continue; 3673 3674 LLDB_LOGF(log, 3675 "warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 3676 "but 0x%8.8x (%s) names didn't match 0x%8.8x (%s)", 3677 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3678 src_die.GetOffset(), src_name, dst_die.GetOffset(), dst_name); 3679 3680 fast_path = false; 3681 } 3682 } 3683 3684 DWARFASTParserClang *src_dwarf_ast_parser = 3685 static_cast<DWARFASTParserClang *>( 3686 SymbolFileDWARF::GetDWARFParser(*src_die.GetCU())); 3687 DWARFASTParserClang *dst_dwarf_ast_parser = 3688 static_cast<DWARFASTParserClang *>( 3689 SymbolFileDWARF::GetDWARFParser(*dst_die.GetCU())); 3690 3691 // Now do the work of linking the DeclContexts and Types. 3692 if (fast_path) { 3693 // We can do this quickly. Just run across the tables index-for-index 3694 // since we know each node has matching names and tags. 3695 for (idx = 0; idx < src_size; ++idx) { 3696 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 3697 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3698 3699 clang::DeclContext *src_decl_ctx = 3700 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3701 if (src_decl_ctx) { 3702 LLDB_LOGF(log, "uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3703 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 3704 dst_die.GetOffset()); 3705 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 3706 } else { 3707 LLDB_LOGF(log, 3708 "warning: tried to unique decl context from 0x%8.8x for " 3709 "0x%8.8x, but none was found", 3710 src_die.GetOffset(), dst_die.GetOffset()); 3711 } 3712 3713 Type *src_child_type = 3714 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3715 if (src_child_type) { 3716 LLDB_LOGF(log, 3717 "uniquing type %p (uid=0x%" PRIx64 3718 ") from 0x%8.8x for 0x%8.8x", 3719 static_cast<void *>(src_child_type), src_child_type->GetID(), 3720 src_die.GetOffset(), dst_die.GetOffset()); 3721 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 3722 } else { 3723 LLDB_LOGF(log, 3724 "warning: tried to unique lldb_private::Type from " 3725 "0x%8.8x for 0x%8.8x, but none was found", 3726 src_die.GetOffset(), dst_die.GetOffset()); 3727 } 3728 } 3729 } else { 3730 // We must do this slowly. For each member of the destination, look up a 3731 // member in the source with the same name, check its tag, and unique them 3732 // if everything matches up. Report failures. 3733 3734 if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty()) { 3735 src_name_to_die.Sort(); 3736 3737 for (idx = 0; idx < dst_size; ++idx) { 3738 ConstString dst_name = dst_name_to_die.GetCStringAtIndex(idx); 3739 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3740 src_die = src_name_to_die.Find(dst_name, DWARFDIE()); 3741 3742 if (src_die && (src_die.Tag() == dst_die.Tag())) { 3743 clang::DeclContext *src_decl_ctx = 3744 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3745 if (src_decl_ctx) { 3746 LLDB_LOGF(log, "uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3747 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 3748 dst_die.GetOffset()); 3749 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 3750 } else { 3751 LLDB_LOGF(log, 3752 "warning: tried to unique decl context from 0x%8.8x " 3753 "for 0x%8.8x, but none was found", 3754 src_die.GetOffset(), dst_die.GetOffset()); 3755 } 3756 3757 Type *src_child_type = 3758 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3759 if (src_child_type) { 3760 LLDB_LOGF( 3761 log, 3762 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 3763 static_cast<void *>(src_child_type), src_child_type->GetID(), 3764 src_die.GetOffset(), dst_die.GetOffset()); 3765 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = 3766 src_child_type; 3767 } else { 3768 LLDB_LOGF(log, 3769 "warning: tried to unique lldb_private::Type from " 3770 "0x%8.8x for 0x%8.8x, but none was found", 3771 src_die.GetOffset(), dst_die.GetOffset()); 3772 } 3773 } else { 3774 LLDB_LOGF(log, "warning: couldn't find a match for 0x%8.8x", 3775 dst_die.GetOffset()); 3776 3777 failures.push_back(dst_die); 3778 } 3779 } 3780 } 3781 } 3782 3783 const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize(); 3784 const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize(); 3785 3786 if (src_size_artificial && dst_size_artificial) { 3787 dst_name_to_die_artificial.Sort(); 3788 3789 for (idx = 0; idx < src_size_artificial; ++idx) { 3790 ConstString src_name_artificial = 3791 src_name_to_die_artificial.GetCStringAtIndex(idx); 3792 src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 3793 dst_die = 3794 dst_name_to_die_artificial.Find(src_name_artificial, DWARFDIE()); 3795 3796 if (dst_die) { 3797 // Both classes have the artificial types, link them 3798 clang::DeclContext *src_decl_ctx = 3799 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3800 if (src_decl_ctx) { 3801 LLDB_LOGF(log, "uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3802 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 3803 dst_die.GetOffset()); 3804 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 3805 } else { 3806 LLDB_LOGF(log, 3807 "warning: tried to unique decl context from 0x%8.8x " 3808 "for 0x%8.8x, but none was found", 3809 src_die.GetOffset(), dst_die.GetOffset()); 3810 } 3811 3812 Type *src_child_type = 3813 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3814 if (src_child_type) { 3815 LLDB_LOGF( 3816 log, 3817 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 3818 static_cast<void *>(src_child_type), src_child_type->GetID(), 3819 src_die.GetOffset(), dst_die.GetOffset()); 3820 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 3821 } else { 3822 LLDB_LOGF(log, 3823 "warning: tried to unique lldb_private::Type from " 3824 "0x%8.8x for 0x%8.8x, but none was found", 3825 src_die.GetOffset(), dst_die.GetOffset()); 3826 } 3827 } 3828 } 3829 } 3830 3831 if (dst_size_artificial) { 3832 for (idx = 0; idx < dst_size_artificial; ++idx) { 3833 ConstString dst_name_artificial = 3834 dst_name_to_die_artificial.GetCStringAtIndex(idx); 3835 dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 3836 LLDB_LOGF(log, 3837 "warning: need to create artificial method for 0x%8.8x for " 3838 "method '%s'", 3839 dst_die.GetOffset(), dst_name_artificial.GetCString()); 3840 3841 failures.push_back(dst_die); 3842 } 3843 } 3844 3845 return !failures.empty(); 3846 } 3847