1 //===-- DWARFASTParserClang.cpp -------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include <stdlib.h> 10 11 #include "DWARFASTParserClang.h" 12 #include "DWARFDebugInfo.h" 13 #include "DWARFDeclContext.h" 14 #include "DWARFDefines.h" 15 #include "SymbolFileDWARF.h" 16 #include "SymbolFileDWARFDebugMap.h" 17 #include "SymbolFileDWARFDwo.h" 18 #include "UniqueDWARFASTType.h" 19 20 #include "Plugins/ExpressionParser/Clang/ClangASTImporter.h" 21 #include "Plugins/ExpressionParser/Clang/ClangASTMetadata.h" 22 #include "Plugins/ExpressionParser/Clang/ClangUtil.h" 23 #include "Plugins/Language/ObjC/ObjCLanguage.h" 24 #include "lldb/Core/Module.h" 25 #include "lldb/Core/Value.h" 26 #include "lldb/Host/Host.h" 27 #include "lldb/Symbol/CompileUnit.h" 28 #include "lldb/Symbol/Function.h" 29 #include "lldb/Symbol/ObjectFile.h" 30 #include "lldb/Symbol/SymbolFile.h" 31 #include "lldb/Symbol/TypeList.h" 32 #include "lldb/Symbol/TypeMap.h" 33 #include "lldb/Target/Language.h" 34 #include "lldb/Utility/LLDBAssert.h" 35 #include "lldb/Utility/Log.h" 36 #include "lldb/Utility/StreamString.h" 37 38 #include "llvm/Demangle/Demangle.h" 39 40 #include "clang/AST/CXXInheritance.h" 41 #include "clang/AST/DeclCXX.h" 42 #include "clang/AST/DeclObjC.h" 43 #include "clang/AST/DeclTemplate.h" 44 45 #include <map> 46 #include <memory> 47 #include <vector> 48 49 //#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN 50 51 #ifdef ENABLE_DEBUG_PRINTF 52 #include <stdio.h> 53 #define DEBUG_PRINTF(fmt, ...) printf(fmt, __VA_ARGS__) 54 #else 55 #define DEBUG_PRINTF(fmt, ...) 56 #endif 57 58 using namespace lldb; 59 using namespace lldb_private; 60 DWARFASTParserClang::DWARFASTParserClang(TypeSystemClang &ast) 61 : m_ast(ast), m_die_to_decl_ctx(), m_decl_ctx_to_die() {} 62 63 DWARFASTParserClang::~DWARFASTParserClang() {} 64 65 static AccessType DW_ACCESS_to_AccessType(uint32_t dwarf_accessibility) { 66 switch (dwarf_accessibility) { 67 case DW_ACCESS_public: 68 return eAccessPublic; 69 case DW_ACCESS_private: 70 return eAccessPrivate; 71 case DW_ACCESS_protected: 72 return eAccessProtected; 73 default: 74 break; 75 } 76 return eAccessNone; 77 } 78 79 static bool DeclKindIsCXXClass(clang::Decl::Kind decl_kind) { 80 switch (decl_kind) { 81 case clang::Decl::CXXRecord: 82 case clang::Decl::ClassTemplateSpecialization: 83 return true; 84 default: 85 break; 86 } 87 return false; 88 } 89 90 91 ClangASTImporter &DWARFASTParserClang::GetClangASTImporter() { 92 if (!m_clang_ast_importer_up) { 93 m_clang_ast_importer_up = std::make_unique<ClangASTImporter>(); 94 } 95 return *m_clang_ast_importer_up; 96 } 97 98 /// Detect a forward declaration that is nested in a DW_TAG_module. 99 static bool IsClangModuleFwdDecl(const DWARFDIE &Die) { 100 if (!Die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0)) 101 return false; 102 auto Parent = Die.GetParent(); 103 while (Parent.IsValid()) { 104 if (Parent.Tag() == DW_TAG_module) 105 return true; 106 Parent = Parent.GetParent(); 107 } 108 return false; 109 } 110 111 static DWARFDIE GetContainingClangModuleDIE(const DWARFDIE &die) { 112 if (die.IsValid()) { 113 DWARFDIE top_module_die; 114 // Now make sure this DIE is scoped in a DW_TAG_module tag and return true 115 // if so 116 for (DWARFDIE parent = die.GetParent(); parent.IsValid(); 117 parent = parent.GetParent()) { 118 const dw_tag_t tag = parent.Tag(); 119 if (tag == DW_TAG_module) 120 top_module_die = parent; 121 else if (tag == DW_TAG_compile_unit || tag == DW_TAG_partial_unit) 122 break; 123 } 124 125 return top_module_die; 126 } 127 return DWARFDIE(); 128 } 129 130 static lldb::ModuleSP GetContainingClangModule(const DWARFDIE &die) { 131 if (die.IsValid()) { 132 DWARFDIE clang_module_die = GetContainingClangModuleDIE(die); 133 134 if (clang_module_die) { 135 const char *module_name = clang_module_die.GetName(); 136 if (module_name) 137 return die.GetDWARF()->GetExternalModule( 138 lldb_private::ConstString(module_name)); 139 } 140 } 141 return lldb::ModuleSP(); 142 } 143 144 TypeSP DWARFASTParserClang::ParseTypeFromClangModule(const SymbolContext &sc, 145 const DWARFDIE &die, 146 Log *log) { 147 ModuleSP clang_module_sp = GetContainingClangModule(die); 148 if (!clang_module_sp) 149 return TypeSP(); 150 151 // If this type comes from a Clang module, recursively look in the 152 // DWARF section of the .pcm file in the module cache. Clang 153 // generates DWO skeleton units as breadcrumbs to find them. 154 llvm::SmallVector<CompilerContext, 4> decl_context; 155 die.GetDeclContext(decl_context); 156 TypeMap pcm_types; 157 158 // The type in the Clang module must have the same language as the current CU. 159 LanguageSet languages; 160 languages.Insert(SymbolFileDWARF::GetLanguage(*die.GetCU())); 161 llvm::DenseSet<SymbolFile *> searched_symbol_files; 162 clang_module_sp->GetSymbolFile()->FindTypes(decl_context, languages, 163 searched_symbol_files, pcm_types); 164 if (pcm_types.Empty()) { 165 // Since this type is defined in one of the Clang modules imported 166 // by this symbol file, search all of them. Instead of calling 167 // sym_file->FindTypes(), which would return this again, go straight 168 // to the imported modules. 169 auto &sym_file = die.GetCU()->GetSymbolFileDWARF(); 170 171 // Well-formed clang modules never form cycles; guard against corrupted 172 // ones by inserting the current file. 173 searched_symbol_files.insert(&sym_file); 174 sym_file.ForEachExternalModule( 175 *sc.comp_unit, searched_symbol_files, [&](Module &module) { 176 module.GetSymbolFile()->FindTypes(decl_context, languages, 177 searched_symbol_files, pcm_types); 178 return pcm_types.GetSize(); 179 }); 180 } 181 182 if (!pcm_types.GetSize()) 183 return TypeSP(); 184 185 // We found a real definition for this type in the Clang module, so lets use 186 // it and cache the fact that we found a complete type for this die. 187 TypeSP pcm_type_sp = pcm_types.GetTypeAtIndex(0); 188 if (!pcm_type_sp) 189 return TypeSP(); 190 191 lldb_private::CompilerType pcm_type = pcm_type_sp->GetForwardCompilerType(); 192 lldb_private::CompilerType type = 193 GetClangASTImporter().CopyType(m_ast, pcm_type); 194 195 if (!type) 196 return TypeSP(); 197 198 // Under normal operation pcm_type is a shallow forward declaration 199 // that gets completed later. This is necessary to support cyclic 200 // data structures. If, however, pcm_type is already complete (for 201 // example, because it was loaded for a different target before), 202 // the definition needs to be imported right away, too. 203 // Type::ResolveClangType() effectively ignores the ResolveState 204 // inside type_sp and only looks at IsDefined(), so it never calls 205 // ClangASTImporter::ASTImporterDelegate::ImportDefinitionTo(), 206 // which does extra work for Objective-C classes. This would result 207 // in only the forward declaration to be visible. 208 if (pcm_type.IsDefined()) 209 GetClangASTImporter().RequireCompleteType(ClangUtil::GetQualType(type)); 210 211 SymbolFileDWARF *dwarf = die.GetDWARF(); 212 TypeSP type_sp(new Type(die.GetID(), dwarf, pcm_type_sp->GetName(), 213 pcm_type_sp->GetByteSize(nullptr), nullptr, 214 LLDB_INVALID_UID, Type::eEncodingInvalid, 215 &pcm_type_sp->GetDeclaration(), type, 216 Type::ResolveState::Forward, 217 TypePayloadClang(GetOwningClangModule(die)))); 218 219 dwarf->GetTypeList().Insert(type_sp); 220 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 221 clang::TagDecl *tag_decl = TypeSystemClang::GetAsTagDecl(type); 222 if (tag_decl) { 223 LinkDeclContextToDIE(tag_decl, die); 224 } else { 225 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE(die); 226 if (defn_decl_ctx) 227 LinkDeclContextToDIE(defn_decl_ctx, die); 228 } 229 230 return type_sp; 231 } 232 233 static void ForcefullyCompleteType(CompilerType type) { 234 bool started = TypeSystemClang::StartTagDeclarationDefinition(type); 235 lldbassert(started && "Unable to start a class type definition."); 236 TypeSystemClang::CompleteTagDeclarationDefinition(type); 237 const clang::TagDecl *td = ClangUtil::GetAsTagDecl(type); 238 auto &ts = llvm::cast<TypeSystemClang>(*type.GetTypeSystem()); 239 ts.GetMetadata(td)->SetIsForcefullyCompleted(); 240 } 241 242 /// Complete a type from debug info, or mark it as forcefully completed if 243 /// there is no definition of the type in the current Module. Call this function 244 /// in contexts where the usual C++ rules require a type to be complete (base 245 /// class, member, etc.). 246 static void RequireCompleteType(CompilerType type) { 247 // Technically, enums can be incomplete too, but we don't handle those as they 248 // are emitted even under -flimit-debug-info. 249 if (!TypeSystemClang::IsCXXClassType(type)) 250 return; 251 252 if (type.GetCompleteType()) 253 return; 254 255 // No complete definition in this module. Mark the class as complete to 256 // satisfy local ast invariants, but make a note of the fact that 257 // it is not _really_ complete so we can later search for a definition in a 258 // different module. 259 // Since we provide layout assistance, layouts of types containing this class 260 // will be correct even if we are not able to find the definition elsewhere. 261 ForcefullyCompleteType(type); 262 } 263 264 /// This function serves a similar purpose as RequireCompleteType above, but it 265 /// avoids completing the type if it is not immediately necessary. It only 266 /// ensures we _can_ complete the type later. 267 static void PrepareContextToReceiveMembers(TypeSystemClang &ast, 268 ClangASTImporter &ast_importer, 269 clang::DeclContext *decl_ctx, 270 DWARFDIE die, 271 const char *type_name_cstr) { 272 auto *tag_decl_ctx = clang::dyn_cast<clang::TagDecl>(decl_ctx); 273 if (!tag_decl_ctx) 274 return; // Non-tag context are always ready. 275 276 // We have already completed the type, or we have found its definition and are 277 // ready to complete it later (cf. ParseStructureLikeDIE). 278 if (tag_decl_ctx->isCompleteDefinition() || tag_decl_ctx->isBeingDefined()) 279 return; 280 281 // We reach this point of the tag was present in the debug info as a 282 // declaration only. If it was imported from another AST context (in the 283 // gmodules case), we can complete the type by doing a full import. 284 285 // If this type was not imported from an external AST, there's nothing to do. 286 CompilerType type = ast.GetTypeForDecl(tag_decl_ctx); 287 if (type && ast_importer.CanImport(type)) { 288 auto qual_type = ClangUtil::GetQualType(type); 289 if (ast_importer.RequireCompleteType(qual_type)) 290 return; 291 die.GetDWARF()->GetObjectFile()->GetModule()->ReportError( 292 "Unable to complete the Decl context for DIE '%s' at offset " 293 "0x%8.8x.\nPlease file a bug report.", 294 type_name_cstr ? type_name_cstr : "", die.GetOffset()); 295 } 296 297 // We don't have a type definition and/or the import failed. We must 298 // forcefully complete the type to avoid crashes. 299 ForcefullyCompleteType(type); 300 } 301 302 ParsedDWARFTypeAttributes::ParsedDWARFTypeAttributes(const DWARFDIE &die) { 303 DWARFAttributes attributes; 304 size_t num_attributes = die.GetAttributes(attributes); 305 for (size_t i = 0; i < num_attributes; ++i) { 306 dw_attr_t attr = attributes.AttributeAtIndex(i); 307 DWARFFormValue form_value; 308 if (!attributes.ExtractFormValueAtIndex(i, form_value)) 309 continue; 310 switch (attr) { 311 case DW_AT_abstract_origin: 312 abstract_origin = form_value; 313 break; 314 315 case DW_AT_accessibility: 316 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 317 break; 318 319 case DW_AT_artificial: 320 is_artificial = form_value.Boolean(); 321 break; 322 323 case DW_AT_bit_stride: 324 bit_stride = form_value.Unsigned(); 325 break; 326 327 case DW_AT_byte_size: 328 byte_size = form_value.Unsigned(); 329 break; 330 331 case DW_AT_byte_stride: 332 byte_stride = form_value.Unsigned(); 333 break; 334 335 case DW_AT_calling_convention: 336 calling_convention = form_value.Unsigned(); 337 break; 338 339 case DW_AT_containing_type: 340 containing_type = form_value; 341 break; 342 343 case DW_AT_decl_file: 344 // die.GetCU() can differ if DW_AT_specification uses DW_FORM_ref_addr. 345 decl.SetFile( 346 attributes.CompileUnitAtIndex(i)->GetFile(form_value.Unsigned())); 347 break; 348 case DW_AT_decl_line: 349 decl.SetLine(form_value.Unsigned()); 350 break; 351 case DW_AT_decl_column: 352 decl.SetColumn(form_value.Unsigned()); 353 break; 354 355 case DW_AT_declaration: 356 is_forward_declaration = form_value.Boolean(); 357 break; 358 359 case DW_AT_encoding: 360 encoding = form_value.Unsigned(); 361 break; 362 363 case DW_AT_enum_class: 364 is_scoped_enum = form_value.Boolean(); 365 break; 366 367 case DW_AT_explicit: 368 is_explicit = form_value.Boolean(); 369 break; 370 371 case DW_AT_external: 372 if (form_value.Unsigned()) 373 storage = clang::SC_Extern; 374 break; 375 376 case DW_AT_inline: 377 is_inline = form_value.Boolean(); 378 break; 379 380 case DW_AT_linkage_name: 381 case DW_AT_MIPS_linkage_name: 382 mangled_name = form_value.AsCString(); 383 break; 384 385 case DW_AT_name: 386 name.SetCString(form_value.AsCString()); 387 break; 388 389 case DW_AT_object_pointer: 390 object_pointer = form_value.Reference(); 391 break; 392 393 case DW_AT_signature: 394 signature = form_value; 395 break; 396 397 case DW_AT_specification: 398 specification = form_value; 399 break; 400 401 case DW_AT_type: 402 type = form_value; 403 break; 404 405 case DW_AT_virtuality: 406 is_virtual = form_value.Boolean(); 407 break; 408 409 case DW_AT_APPLE_objc_complete_type: 410 is_complete_objc_class = form_value.Signed(); 411 break; 412 413 case DW_AT_APPLE_objc_direct: 414 is_objc_direct_call = true; 415 break; 416 417 case DW_AT_APPLE_runtime_class: 418 class_language = (LanguageType)form_value.Signed(); 419 break; 420 421 case DW_AT_GNU_vector: 422 is_vector = form_value.Boolean(); 423 break; 424 case DW_AT_export_symbols: 425 exports_symbols = form_value.Boolean(); 426 break; 427 } 428 } 429 } 430 431 static std::string GetUnitName(const DWARFDIE &die) { 432 if (DWARFUnit *unit = die.GetCU()) 433 return unit->GetAbsolutePath().GetPath(); 434 return "<missing DWARF unit path>"; 435 } 436 437 TypeSP DWARFASTParserClang::ParseTypeFromDWARF(const SymbolContext &sc, 438 const DWARFDIE &die, 439 bool *type_is_new_ptr) { 440 if (type_is_new_ptr) 441 *type_is_new_ptr = false; 442 443 if (!die) 444 return nullptr; 445 446 Log *log(LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION | 447 DWARF_LOG_LOOKUPS)); 448 449 SymbolFileDWARF *dwarf = die.GetDWARF(); 450 if (log) { 451 DWARFDIE context_die; 452 clang::DeclContext *context = 453 GetClangDeclContextContainingDIE(die, &context_die); 454 455 dwarf->GetObjectFile()->GetModule()->LogMessage( 456 log, 457 "DWARFASTParserClang::ParseTypeFromDWARF " 458 "(die = 0x%8.8x, decl_ctx = %p (die 0x%8.8x)) %s name = '%s')", 459 die.GetOffset(), static_cast<void *>(context), context_die.GetOffset(), 460 die.GetTagAsCString(), die.GetName()); 461 } 462 463 Type *type_ptr = dwarf->GetDIEToType().lookup(die.GetDIE()); 464 if (type_ptr == DIE_IS_BEING_PARSED) 465 return nullptr; 466 if (type_ptr) 467 return type_ptr->shared_from_this(); 468 // Set a bit that lets us know that we are currently parsing this 469 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 470 471 ParsedDWARFTypeAttributes attrs(die); 472 473 if (DWARFDIE signature_die = attrs.signature.Reference()) { 474 if (TypeSP type_sp = 475 ParseTypeFromDWARF(sc, signature_die, type_is_new_ptr)) { 476 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 477 if (clang::DeclContext *decl_ctx = 478 GetCachedClangDeclContextForDIE(signature_die)) 479 LinkDeclContextToDIE(decl_ctx, die); 480 return type_sp; 481 } 482 return nullptr; 483 } 484 485 if (type_is_new_ptr) 486 *type_is_new_ptr = true; 487 488 const dw_tag_t tag = die.Tag(); 489 490 TypeSP type_sp; 491 492 switch (tag) { 493 case DW_TAG_typedef: 494 case DW_TAG_base_type: 495 case DW_TAG_pointer_type: 496 case DW_TAG_reference_type: 497 case DW_TAG_rvalue_reference_type: 498 case DW_TAG_const_type: 499 case DW_TAG_restrict_type: 500 case DW_TAG_volatile_type: 501 case DW_TAG_atomic_type: 502 case DW_TAG_unspecified_type: { 503 type_sp = ParseTypeModifier(sc, die, attrs); 504 break; 505 } 506 507 case DW_TAG_structure_type: 508 case DW_TAG_union_type: 509 case DW_TAG_class_type: { 510 type_sp = ParseStructureLikeDIE(sc, die, attrs); 511 break; 512 } 513 514 case DW_TAG_enumeration_type: { 515 type_sp = ParseEnum(sc, die, attrs); 516 break; 517 } 518 519 case DW_TAG_inlined_subroutine: 520 case DW_TAG_subprogram: 521 case DW_TAG_subroutine_type: { 522 type_sp = ParseSubroutine(die, attrs); 523 break; 524 } 525 case DW_TAG_array_type: { 526 type_sp = ParseArrayType(die, attrs); 527 break; 528 } 529 case DW_TAG_ptr_to_member_type: { 530 type_sp = ParsePointerToMemberType(die, attrs); 531 break; 532 } 533 default: 534 dwarf->GetObjectFile()->GetModule()->ReportError( 535 "{0x%8.8x}: unhandled type tag 0x%4.4x (%s), please file a bug and " 536 "attach the file at the start of this error message", 537 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 538 break; 539 } 540 541 // TODO: We should consider making the switch above exhaustive to simplify 542 // control flow in ParseTypeFromDWARF. Then, we could simply replace this 543 // return statement with a call to llvm_unreachable. 544 return UpdateSymbolContextScopeForType(sc, die, type_sp); 545 } 546 547 lldb::TypeSP 548 DWARFASTParserClang::ParseTypeModifier(const SymbolContext &sc, 549 const DWARFDIE &die, 550 ParsedDWARFTypeAttributes &attrs) { 551 Log *log(LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION | 552 DWARF_LOG_LOOKUPS)); 553 SymbolFileDWARF *dwarf = die.GetDWARF(); 554 const dw_tag_t tag = die.Tag(); 555 LanguageType cu_language = SymbolFileDWARF::GetLanguage(*die.GetCU()); 556 Type::ResolveState resolve_state = Type::ResolveState::Unresolved; 557 Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID; 558 TypeSP type_sp; 559 CompilerType clang_type; 560 561 if (tag == DW_TAG_typedef) { 562 // DeclContext will be populated when the clang type is materialized in 563 // Type::ResolveCompilerType. 564 PrepareContextToReceiveMembers( 565 m_ast, GetClangASTImporter(), 566 GetClangDeclContextContainingDIE(die, nullptr), die, 567 attrs.name.GetCString()); 568 569 if (attrs.type.IsValid()) { 570 // Try to parse a typedef from the (DWARF embedded in the) Clang 571 // module file first as modules can contain typedef'ed 572 // structures that have no names like: 573 // 574 // typedef struct { int a; } Foo; 575 // 576 // In this case we will have a structure with no name and a 577 // typedef named "Foo" that points to this unnamed 578 // structure. The name in the typedef is the only identifier for 579 // the struct, so always try to get typedefs from Clang modules 580 // if possible. 581 // 582 // The type_sp returned will be empty if the typedef doesn't 583 // exist in a module file, so it is cheap to call this function 584 // just to check. 585 // 586 // If we don't do this we end up creating a TypeSP that says 587 // this is a typedef to type 0x123 (the DW_AT_type value would 588 // be 0x123 in the DW_TAG_typedef), and this is the unnamed 589 // structure type. We will have a hard time tracking down an 590 // unnammed structure type in the module debug info, so we make 591 // sure we don't get into this situation by always resolving 592 // typedefs from the module. 593 const DWARFDIE encoding_die = attrs.type.Reference(); 594 595 // First make sure that the die that this is typedef'ed to _is_ 596 // just a declaration (DW_AT_declaration == 1), not a full 597 // definition since template types can't be represented in 598 // modules since only concrete instances of templates are ever 599 // emitted and modules won't contain those 600 if (encoding_die && 601 encoding_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 602 type_sp = ParseTypeFromClangModule(sc, die, log); 603 if (type_sp) 604 return type_sp; 605 } 606 } 607 } 608 609 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\") type => 0x%8.8lx\n", die.GetID(), 610 DW_TAG_value_to_name(tag), type_name_cstr, 611 encoding_uid.Reference()); 612 613 switch (tag) { 614 default: 615 break; 616 617 case DW_TAG_unspecified_type: 618 if (attrs.name == "nullptr_t" || attrs.name == "decltype(nullptr)") { 619 resolve_state = Type::ResolveState::Full; 620 clang_type = m_ast.GetBasicType(eBasicTypeNullPtr); 621 break; 622 } 623 // Fall through to base type below in case we can handle the type 624 // there... 625 LLVM_FALLTHROUGH; 626 627 case DW_TAG_base_type: 628 resolve_state = Type::ResolveState::Full; 629 clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize( 630 attrs.name.GetStringRef(), attrs.encoding, 631 attrs.byte_size.getValueOr(0) * 8); 632 break; 633 634 case DW_TAG_pointer_type: 635 encoding_data_type = Type::eEncodingIsPointerUID; 636 break; 637 case DW_TAG_reference_type: 638 encoding_data_type = Type::eEncodingIsLValueReferenceUID; 639 break; 640 case DW_TAG_rvalue_reference_type: 641 encoding_data_type = Type::eEncodingIsRValueReferenceUID; 642 break; 643 case DW_TAG_typedef: 644 encoding_data_type = Type::eEncodingIsTypedefUID; 645 break; 646 case DW_TAG_const_type: 647 encoding_data_type = Type::eEncodingIsConstUID; 648 break; 649 case DW_TAG_restrict_type: 650 encoding_data_type = Type::eEncodingIsRestrictUID; 651 break; 652 case DW_TAG_volatile_type: 653 encoding_data_type = Type::eEncodingIsVolatileUID; 654 break; 655 case DW_TAG_atomic_type: 656 encoding_data_type = Type::eEncodingIsAtomicUID; 657 break; 658 } 659 660 if (!clang_type && (encoding_data_type == Type::eEncodingIsPointerUID || 661 encoding_data_type == Type::eEncodingIsTypedefUID)) { 662 if (tag == DW_TAG_pointer_type) { 663 DWARFDIE target_die = die.GetReferencedDIE(DW_AT_type); 664 665 if (target_die.GetAttributeValueAsUnsigned(DW_AT_APPLE_block, 0)) { 666 // Blocks have a __FuncPtr inside them which is a pointer to a 667 // function of the proper type. 668 669 for (DWARFDIE child_die = target_die.GetFirstChild(); 670 child_die.IsValid(); child_die = child_die.GetSibling()) { 671 if (!strcmp(child_die.GetAttributeValueAsString(DW_AT_name, ""), 672 "__FuncPtr")) { 673 DWARFDIE function_pointer_type = 674 child_die.GetReferencedDIE(DW_AT_type); 675 676 if (function_pointer_type) { 677 DWARFDIE function_type = 678 function_pointer_type.GetReferencedDIE(DW_AT_type); 679 680 bool function_type_is_new_pointer; 681 TypeSP lldb_function_type_sp = ParseTypeFromDWARF( 682 sc, function_type, &function_type_is_new_pointer); 683 684 if (lldb_function_type_sp) { 685 clang_type = m_ast.CreateBlockPointerType( 686 lldb_function_type_sp->GetForwardCompilerType()); 687 encoding_data_type = Type::eEncodingIsUID; 688 attrs.type.Clear(); 689 resolve_state = Type::ResolveState::Full; 690 } 691 } 692 693 break; 694 } 695 } 696 } 697 } 698 699 if (cu_language == eLanguageTypeObjC || 700 cu_language == eLanguageTypeObjC_plus_plus) { 701 if (attrs.name) { 702 if (attrs.name == "id") { 703 if (log) 704 dwarf->GetObjectFile()->GetModule()->LogMessage( 705 log, 706 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 707 "is Objective-C 'id' built-in type.", 708 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 709 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 710 encoding_data_type = Type::eEncodingIsUID; 711 attrs.type.Clear(); 712 resolve_state = Type::ResolveState::Full; 713 } else if (attrs.name == "Class") { 714 if (log) 715 dwarf->GetObjectFile()->GetModule()->LogMessage( 716 log, 717 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 718 "is Objective-C 'Class' built-in type.", 719 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 720 clang_type = m_ast.GetBasicType(eBasicTypeObjCClass); 721 encoding_data_type = Type::eEncodingIsUID; 722 attrs.type.Clear(); 723 resolve_state = Type::ResolveState::Full; 724 } else if (attrs.name == "SEL") { 725 if (log) 726 dwarf->GetObjectFile()->GetModule()->LogMessage( 727 log, 728 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 729 "is Objective-C 'selector' built-in type.", 730 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 731 clang_type = m_ast.GetBasicType(eBasicTypeObjCSel); 732 encoding_data_type = Type::eEncodingIsUID; 733 attrs.type.Clear(); 734 resolve_state = Type::ResolveState::Full; 735 } 736 } else if (encoding_data_type == Type::eEncodingIsPointerUID && 737 attrs.type.IsValid()) { 738 // Clang sometimes erroneously emits id as objc_object*. In that 739 // case we fix up the type to "id". 740 741 const DWARFDIE encoding_die = attrs.type.Reference(); 742 743 if (encoding_die && encoding_die.Tag() == DW_TAG_structure_type) { 744 llvm::StringRef struct_name = encoding_die.GetName(); 745 if (struct_name == "objc_object") { 746 if (log) 747 dwarf->GetObjectFile()->GetModule()->LogMessage( 748 log, 749 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s " 750 "'%s' is 'objc_object*', which we overrode to " 751 "'id'.", 752 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 753 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 754 encoding_data_type = Type::eEncodingIsUID; 755 attrs.type.Clear(); 756 resolve_state = Type::ResolveState::Full; 757 } 758 } 759 } 760 } 761 } 762 763 type_sp = std::make_shared<Type>( 764 die.GetID(), dwarf, attrs.name, attrs.byte_size, nullptr, 765 dwarf->GetUID(attrs.type.Reference()), encoding_data_type, &attrs.decl, 766 clang_type, resolve_state, TypePayloadClang(GetOwningClangModule(die))); 767 768 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 769 return type_sp; 770 } 771 772 TypeSP DWARFASTParserClang::ParseEnum(const SymbolContext &sc, 773 const DWARFDIE &die, 774 ParsedDWARFTypeAttributes &attrs) { 775 Log *log(LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION | 776 DWARF_LOG_LOOKUPS)); 777 SymbolFileDWARF *dwarf = die.GetDWARF(); 778 const dw_tag_t tag = die.Tag(); 779 TypeSP type_sp; 780 781 if (attrs.is_forward_declaration) { 782 type_sp = ParseTypeFromClangModule(sc, die, log); 783 if (type_sp) 784 return type_sp; 785 786 DWARFDeclContext die_decl_ctx = SymbolFileDWARF::GetDWARFDeclContext(die); 787 788 type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx); 789 790 if (!type_sp) { 791 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 792 if (debug_map_symfile) { 793 // We weren't able to find a full declaration in this DWARF, 794 // see if we have a declaration anywhere else... 795 type_sp = debug_map_symfile->FindDefinitionTypeForDWARFDeclContext( 796 die_decl_ctx); 797 } 798 } 799 800 if (type_sp) { 801 if (log) { 802 dwarf->GetObjectFile()->GetModule()->LogMessage( 803 log, 804 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 805 "forward declaration, complete type is 0x%8.8" PRIx64, 806 static_cast<void *>(this), die.GetOffset(), 807 DW_TAG_value_to_name(tag), attrs.name.GetCString(), 808 type_sp->GetID()); 809 } 810 811 // We found a real definition for this type elsewhere so lets use 812 // it and cache the fact that we found a complete type for this 813 // die 814 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 815 clang::DeclContext *defn_decl_ctx = 816 GetCachedClangDeclContextForDIE(dwarf->GetDIE(type_sp->GetID())); 817 if (defn_decl_ctx) 818 LinkDeclContextToDIE(defn_decl_ctx, die); 819 return type_sp; 820 } 821 } 822 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 823 DW_TAG_value_to_name(tag), type_name_cstr); 824 825 CompilerType enumerator_clang_type; 826 CompilerType clang_type; 827 clang_type.SetCompilerType( 828 &m_ast, dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE())); 829 if (!clang_type) { 830 if (attrs.type.IsValid()) { 831 Type *enumerator_type = 832 dwarf->ResolveTypeUID(attrs.type.Reference(), true); 833 if (enumerator_type) 834 enumerator_clang_type = enumerator_type->GetFullCompilerType(); 835 } 836 837 if (!enumerator_clang_type) { 838 if (attrs.byte_size) { 839 enumerator_clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize( 840 "", DW_ATE_signed, *attrs.byte_size * 8); 841 } else { 842 enumerator_clang_type = m_ast.GetBasicType(eBasicTypeInt); 843 } 844 } 845 846 clang_type = m_ast.CreateEnumerationType( 847 attrs.name.GetCString(), GetClangDeclContextContainingDIE(die, nullptr), 848 GetOwningClangModule(die), attrs.decl, enumerator_clang_type, 849 attrs.is_scoped_enum); 850 } else { 851 enumerator_clang_type = m_ast.GetEnumerationIntegerType(clang_type); 852 } 853 854 LinkDeclContextToDIE(TypeSystemClang::GetDeclContextForType(clang_type), die); 855 856 type_sp = std::make_shared<Type>( 857 die.GetID(), dwarf, attrs.name, attrs.byte_size, nullptr, 858 dwarf->GetUID(attrs.type.Reference()), Type::eEncodingIsUID, &attrs.decl, 859 clang_type, Type::ResolveState::Forward, 860 TypePayloadClang(GetOwningClangModule(die))); 861 862 if (TypeSystemClang::StartTagDeclarationDefinition(clang_type)) { 863 if (die.HasChildren()) { 864 bool is_signed = false; 865 enumerator_clang_type.IsIntegerType(is_signed); 866 ParseChildEnumerators(clang_type, is_signed, 867 type_sp->GetByteSize(nullptr).getValueOr(0), die); 868 } 869 TypeSystemClang::CompleteTagDeclarationDefinition(clang_type); 870 } else { 871 dwarf->GetObjectFile()->GetModule()->ReportError( 872 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 873 "definition.\nPlease file a bug and attach the file at the " 874 "start of this error message", 875 die.GetOffset(), attrs.name.GetCString()); 876 } 877 return type_sp; 878 } 879 880 TypeSP DWARFASTParserClang::ParseSubroutine(const DWARFDIE &die, 881 ParsedDWARFTypeAttributes &attrs) { 882 Log *log(LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION | 883 DWARF_LOG_LOOKUPS)); 884 885 SymbolFileDWARF *dwarf = die.GetDWARF(); 886 const dw_tag_t tag = die.Tag(); 887 888 bool is_variadic = false; 889 bool is_static = false; 890 bool has_template_params = false; 891 892 unsigned type_quals = 0; 893 894 std::string object_pointer_name; 895 if (attrs.object_pointer) { 896 const char *object_pointer_name_cstr = attrs.object_pointer.GetName(); 897 if (object_pointer_name_cstr) 898 object_pointer_name = object_pointer_name_cstr; 899 } 900 901 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 902 DW_TAG_value_to_name(tag), type_name_cstr); 903 904 CompilerType return_clang_type; 905 Type *func_type = NULL; 906 907 if (attrs.type.IsValid()) 908 func_type = dwarf->ResolveTypeUID(attrs.type.Reference(), true); 909 910 if (func_type) 911 return_clang_type = func_type->GetForwardCompilerType(); 912 else 913 return_clang_type = m_ast.GetBasicType(eBasicTypeVoid); 914 915 std::vector<CompilerType> function_param_types; 916 std::vector<clang::ParmVarDecl *> function_param_decls; 917 918 // Parse the function children for the parameters 919 920 DWARFDIE decl_ctx_die; 921 clang::DeclContext *containing_decl_ctx = 922 GetClangDeclContextContainingDIE(die, &decl_ctx_die); 923 const clang::Decl::Kind containing_decl_kind = 924 containing_decl_ctx->getDeclKind(); 925 926 bool is_cxx_method = DeclKindIsCXXClass(containing_decl_kind); 927 // Start off static. This will be set to false in 928 // ParseChildParameters(...) if we find a "this" parameters as the 929 // first parameter 930 if (is_cxx_method) { 931 is_static = true; 932 } 933 934 if (die.HasChildren()) { 935 bool skip_artificial = true; 936 ParseChildParameters(containing_decl_ctx, die, skip_artificial, is_static, 937 is_variadic, has_template_params, 938 function_param_types, function_param_decls, 939 type_quals); 940 } 941 942 bool ignore_containing_context = false; 943 // Check for templatized class member functions. If we had any 944 // DW_TAG_template_type_parameter or DW_TAG_template_value_parameter 945 // the DW_TAG_subprogram DIE, then we can't let this become a method in 946 // a class. Why? Because templatized functions are only emitted if one 947 // of the templatized methods is used in the current compile unit and 948 // we will end up with classes that may or may not include these member 949 // functions and this means one class won't match another class 950 // definition and it affects our ability to use a class in the clang 951 // expression parser. So for the greater good, we currently must not 952 // allow any template member functions in a class definition. 953 if (is_cxx_method && has_template_params) { 954 ignore_containing_context = true; 955 is_cxx_method = false; 956 } 957 958 // clang_type will get the function prototype clang type after this 959 // call 960 CompilerType clang_type = m_ast.CreateFunctionType( 961 return_clang_type, function_param_types.data(), 962 function_param_types.size(), is_variadic, type_quals); 963 964 if (attrs.name) { 965 bool type_handled = false; 966 if (tag == DW_TAG_subprogram || tag == DW_TAG_inlined_subroutine) { 967 ObjCLanguage::MethodName objc_method(attrs.name.GetStringRef(), true); 968 if (objc_method.IsValid(true)) { 969 CompilerType class_opaque_type; 970 ConstString class_name(objc_method.GetClassName()); 971 if (class_name) { 972 TypeSP complete_objc_class_type_sp( 973 dwarf->FindCompleteObjCDefinitionTypeForDIE(DWARFDIE(), 974 class_name, false)); 975 976 if (complete_objc_class_type_sp) { 977 CompilerType type_clang_forward_type = 978 complete_objc_class_type_sp->GetForwardCompilerType(); 979 if (TypeSystemClang::IsObjCObjectOrInterfaceType( 980 type_clang_forward_type)) 981 class_opaque_type = type_clang_forward_type; 982 } 983 } 984 985 if (class_opaque_type) { 986 // If accessibility isn't set to anything valid, assume public 987 // for now... 988 if (attrs.accessibility == eAccessNone) 989 attrs.accessibility = eAccessPublic; 990 991 clang::ObjCMethodDecl *objc_method_decl = 992 m_ast.AddMethodToObjCObjectType( 993 class_opaque_type, attrs.name.GetCString(), clang_type, 994 attrs.accessibility, attrs.is_artificial, is_variadic, 995 attrs.is_objc_direct_call); 996 type_handled = objc_method_decl != NULL; 997 if (type_handled) { 998 LinkDeclContextToDIE(objc_method_decl, die); 999 m_ast.SetMetadataAsUserID(objc_method_decl, die.GetID()); 1000 } else { 1001 dwarf->GetObjectFile()->GetModule()->ReportError( 1002 "{0x%8.8x}: invalid Objective-C method 0x%4.4x (%s), " 1003 "please file a bug and attach the file at the start of " 1004 "this error message", 1005 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 1006 } 1007 } 1008 } else if (is_cxx_method) { 1009 // Look at the parent of this DIE and see if is is a class or 1010 // struct and see if this is actually a C++ method 1011 Type *class_type = dwarf->ResolveType(decl_ctx_die); 1012 if (class_type) { 1013 bool alternate_defn = false; 1014 if (class_type->GetID() != decl_ctx_die.GetID() || 1015 IsClangModuleFwdDecl(decl_ctx_die)) { 1016 alternate_defn = true; 1017 1018 // We uniqued the parent class of this function to another 1019 // class so we now need to associate all dies under 1020 // "decl_ctx_die" to DIEs in the DIE for "class_type"... 1021 DWARFDIE class_type_die = dwarf->GetDIE(class_type->GetID()); 1022 1023 if (class_type_die) { 1024 std::vector<DWARFDIE> failures; 1025 1026 CopyUniqueClassMethodTypes(decl_ctx_die, class_type_die, 1027 class_type, failures); 1028 1029 // FIXME do something with these failures that's 1030 // smarter than just dropping them on the ground. 1031 // Unfortunately classes don't like having stuff added 1032 // to them after their definitions are complete... 1033 1034 Type *type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1035 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1036 return type_ptr->shared_from_this(); 1037 } 1038 } 1039 } 1040 1041 if (attrs.specification.IsValid()) { 1042 // We have a specification which we are going to base our 1043 // function prototype off of, so we need this type to be 1044 // completed so that the m_die_to_decl_ctx for the method in 1045 // the specification has a valid clang decl context. 1046 class_type->GetForwardCompilerType(); 1047 // If we have a specification, then the function type should 1048 // have been made with the specification and not with this 1049 // die. 1050 DWARFDIE spec_die = attrs.specification.Reference(); 1051 clang::DeclContext *spec_clang_decl_ctx = 1052 GetClangDeclContextForDIE(spec_die); 1053 if (spec_clang_decl_ctx) { 1054 LinkDeclContextToDIE(spec_clang_decl_ctx, die); 1055 } else { 1056 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1057 "0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8x" 1058 ") has no decl\n", 1059 die.GetID(), spec_die.GetOffset()); 1060 } 1061 type_handled = true; 1062 } else if (attrs.abstract_origin.IsValid()) { 1063 // We have a specification which we are going to base our 1064 // function prototype off of, so we need this type to be 1065 // completed so that the m_die_to_decl_ctx for the method in 1066 // the abstract origin has a valid clang decl context. 1067 class_type->GetForwardCompilerType(); 1068 1069 DWARFDIE abs_die = attrs.abstract_origin.Reference(); 1070 clang::DeclContext *abs_clang_decl_ctx = 1071 GetClangDeclContextForDIE(abs_die); 1072 if (abs_clang_decl_ctx) { 1073 LinkDeclContextToDIE(abs_clang_decl_ctx, die); 1074 } else { 1075 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1076 "0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8x" 1077 ") has no decl\n", 1078 die.GetID(), abs_die.GetOffset()); 1079 } 1080 type_handled = true; 1081 } else { 1082 CompilerType class_opaque_type = 1083 class_type->GetForwardCompilerType(); 1084 if (TypeSystemClang::IsCXXClassType(class_opaque_type)) { 1085 if (class_opaque_type.IsBeingDefined() || alternate_defn) { 1086 if (!is_static && !die.HasChildren()) { 1087 // We have a C++ member function with no children (this 1088 // pointer!) and clang will get mad if we try and make 1089 // a function that isn't well formed in the DWARF, so 1090 // we will just skip it... 1091 type_handled = true; 1092 } else { 1093 bool add_method = true; 1094 if (alternate_defn) { 1095 // If an alternate definition for the class exists, 1096 // then add the method only if an equivalent is not 1097 // already present. 1098 clang::CXXRecordDecl *record_decl = 1099 m_ast.GetAsCXXRecordDecl( 1100 class_opaque_type.GetOpaqueQualType()); 1101 if (record_decl) { 1102 for (auto method_iter = record_decl->method_begin(); 1103 method_iter != record_decl->method_end(); 1104 method_iter++) { 1105 clang::CXXMethodDecl *method_decl = *method_iter; 1106 if (method_decl->getNameInfo().getAsString() == 1107 attrs.name.GetStringRef()) { 1108 if (method_decl->getType() == 1109 ClangUtil::GetQualType(clang_type)) { 1110 add_method = false; 1111 LinkDeclContextToDIE(method_decl, die); 1112 type_handled = true; 1113 1114 break; 1115 } 1116 } 1117 } 1118 } 1119 } 1120 1121 if (add_method) { 1122 llvm::PrettyStackTraceFormat stack_trace( 1123 "SymbolFileDWARF::ParseType() is adding a method " 1124 "%s to class %s in DIE 0x%8.8" PRIx64 " from %s", 1125 attrs.name.GetCString(), 1126 class_type->GetName().GetCString(), die.GetID(), 1127 dwarf->GetObjectFile() 1128 ->GetFileSpec() 1129 .GetPath() 1130 .c_str()); 1131 1132 const bool is_attr_used = false; 1133 // Neither GCC 4.2 nor clang++ currently set a valid 1134 // accessibility in the DWARF for C++ methods... 1135 // Default to public for now... 1136 if (attrs.accessibility == eAccessNone) 1137 attrs.accessibility = eAccessPublic; 1138 1139 clang::CXXMethodDecl *cxx_method_decl = 1140 m_ast.AddMethodToCXXRecordType( 1141 class_opaque_type.GetOpaqueQualType(), 1142 attrs.name.GetCString(), attrs.mangled_name, 1143 clang_type, attrs.accessibility, attrs.is_virtual, 1144 is_static, attrs.is_inline, attrs.is_explicit, 1145 is_attr_used, attrs.is_artificial); 1146 1147 type_handled = cxx_method_decl != NULL; 1148 // Artificial methods are always handled even when we 1149 // don't create a new declaration for them. 1150 type_handled |= attrs.is_artificial; 1151 1152 if (cxx_method_decl) { 1153 LinkDeclContextToDIE(cxx_method_decl, die); 1154 1155 ClangASTMetadata metadata; 1156 metadata.SetUserID(die.GetID()); 1157 1158 if (!object_pointer_name.empty()) { 1159 metadata.SetObjectPtrName( 1160 object_pointer_name.c_str()); 1161 LLDB_LOGF(log, 1162 "Setting object pointer name: %s on method " 1163 "object %p.\n", 1164 object_pointer_name.c_str(), 1165 static_cast<void *>(cxx_method_decl)); 1166 } 1167 m_ast.SetMetadata(cxx_method_decl, metadata); 1168 } else { 1169 ignore_containing_context = true; 1170 } 1171 } 1172 } 1173 } else { 1174 // We were asked to parse the type for a method in a 1175 // class, yet the class hasn't been asked to complete 1176 // itself through the clang::ExternalASTSource protocol, 1177 // so we need to just have the class complete itself and 1178 // do things the right way, then our 1179 // DIE should then have an entry in the 1180 // dwarf->GetDIEToType() map. First 1181 // we need to modify the dwarf->GetDIEToType() so it 1182 // doesn't think we are trying to parse this DIE 1183 // anymore... 1184 dwarf->GetDIEToType()[die.GetDIE()] = NULL; 1185 1186 // Now we get the full type to force our class type to 1187 // complete itself using the clang::ExternalASTSource 1188 // protocol which will parse all base classes and all 1189 // methods (including the method for this DIE). 1190 class_type->GetFullCompilerType(); 1191 1192 // The type for this DIE should have been filled in the 1193 // function call above 1194 Type *type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1195 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1196 return type_ptr->shared_from_this(); 1197 } 1198 1199 // FIXME This is fixing some even uglier behavior but we 1200 // really need to 1201 // uniq the methods of each class as well as the class 1202 // itself. <rdar://problem/11240464> 1203 type_handled = true; 1204 } 1205 } 1206 } 1207 } 1208 } 1209 } 1210 1211 if (!type_handled) { 1212 clang::FunctionDecl *function_decl = nullptr; 1213 clang::FunctionDecl *template_function_decl = nullptr; 1214 1215 if (attrs.abstract_origin.IsValid()) { 1216 DWARFDIE abs_die = attrs.abstract_origin.Reference(); 1217 1218 if (dwarf->ResolveType(abs_die)) { 1219 function_decl = llvm::dyn_cast_or_null<clang::FunctionDecl>( 1220 GetCachedClangDeclContextForDIE(abs_die)); 1221 1222 if (function_decl) { 1223 LinkDeclContextToDIE(function_decl, die); 1224 } 1225 } 1226 } 1227 1228 if (!function_decl) { 1229 llvm::StringRef name = attrs.name.GetStringRef(); 1230 1231 // We currently generate function templates with template parameters in 1232 // their name. In order to get closer to the AST that clang generates 1233 // we want to strip these from the name when creating the AST. 1234 if (attrs.mangled_name) { 1235 llvm::ItaniumPartialDemangler D; 1236 if (!D.partialDemangle(attrs.mangled_name)) 1237 name = D.getFunctionBaseName(nullptr, nullptr); 1238 } 1239 1240 // We just have a function that isn't part of a class 1241 function_decl = m_ast.CreateFunctionDeclaration( 1242 ignore_containing_context ? m_ast.GetTranslationUnitDecl() 1243 : containing_decl_ctx, 1244 GetOwningClangModule(die), name, clang_type, attrs.storage, 1245 attrs.is_inline); 1246 1247 if (has_template_params) { 1248 TypeSystemClang::TemplateParameterInfos template_param_infos; 1249 ParseTemplateParameterInfos(die, template_param_infos); 1250 template_function_decl = m_ast.CreateFunctionDeclaration( 1251 ignore_containing_context ? m_ast.GetTranslationUnitDecl() 1252 : containing_decl_ctx, 1253 GetOwningClangModule(die), attrs.name.GetStringRef(), clang_type, 1254 attrs.storage, attrs.is_inline); 1255 clang::FunctionTemplateDecl *func_template_decl = 1256 m_ast.CreateFunctionTemplateDecl( 1257 containing_decl_ctx, GetOwningClangModule(die), 1258 template_function_decl, template_param_infos); 1259 m_ast.CreateFunctionTemplateSpecializationInfo( 1260 template_function_decl, func_template_decl, template_param_infos); 1261 } 1262 1263 lldbassert(function_decl); 1264 1265 if (function_decl) { 1266 LinkDeclContextToDIE(function_decl, die); 1267 1268 if (!function_param_decls.empty()) { 1269 m_ast.SetFunctionParameters(function_decl, 1270 &function_param_decls.front(), 1271 function_param_decls.size()); 1272 if (template_function_decl) 1273 m_ast.SetFunctionParameters(template_function_decl, 1274 &function_param_decls.front(), 1275 function_param_decls.size()); 1276 } 1277 1278 ClangASTMetadata metadata; 1279 metadata.SetUserID(die.GetID()); 1280 1281 if (!object_pointer_name.empty()) { 1282 metadata.SetObjectPtrName(object_pointer_name.c_str()); 1283 LLDB_LOGF(log, 1284 "Setting object pointer name: %s on function " 1285 "object %p.", 1286 object_pointer_name.c_str(), 1287 static_cast<void *>(function_decl)); 1288 } 1289 m_ast.SetMetadata(function_decl, metadata); 1290 } 1291 } 1292 } 1293 } 1294 return std::make_shared<Type>( 1295 die.GetID(), dwarf, attrs.name, llvm::None, nullptr, LLDB_INVALID_UID, 1296 Type::eEncodingIsUID, &attrs.decl, clang_type, Type::ResolveState::Full); 1297 } 1298 1299 TypeSP DWARFASTParserClang::ParseArrayType(const DWARFDIE &die, 1300 ParsedDWARFTypeAttributes &attrs) { 1301 SymbolFileDWARF *dwarf = die.GetDWARF(); 1302 1303 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1304 DW_TAG_value_to_name(tag), type_name_cstr); 1305 1306 DWARFDIE type_die = attrs.type.Reference(); 1307 Type *element_type = dwarf->ResolveTypeUID(type_die, true); 1308 1309 if (!element_type) 1310 return nullptr; 1311 1312 llvm::Optional<SymbolFile::ArrayInfo> array_info = ParseChildArrayInfo(die); 1313 if (array_info) { 1314 attrs.byte_stride = array_info->byte_stride; 1315 attrs.bit_stride = array_info->bit_stride; 1316 } 1317 if (attrs.byte_stride == 0 && attrs.bit_stride == 0) 1318 attrs.byte_stride = element_type->GetByteSize(nullptr).getValueOr(0); 1319 CompilerType array_element_type = element_type->GetForwardCompilerType(); 1320 RequireCompleteType(array_element_type); 1321 1322 uint64_t array_element_bit_stride = 1323 attrs.byte_stride * 8 + attrs.bit_stride; 1324 CompilerType clang_type; 1325 if (array_info && array_info->element_orders.size() > 0) { 1326 uint64_t num_elements = 0; 1327 auto end = array_info->element_orders.rend(); 1328 for (auto pos = array_info->element_orders.rbegin(); pos != end; ++pos) { 1329 num_elements = *pos; 1330 clang_type = m_ast.CreateArrayType(array_element_type, num_elements, 1331 attrs.is_vector); 1332 array_element_type = clang_type; 1333 array_element_bit_stride = num_elements 1334 ? array_element_bit_stride * num_elements 1335 : array_element_bit_stride; 1336 } 1337 } else { 1338 clang_type = 1339 m_ast.CreateArrayType(array_element_type, 0, attrs.is_vector); 1340 } 1341 ConstString empty_name; 1342 TypeSP type_sp = std::make_shared<Type>( 1343 die.GetID(), dwarf, empty_name, array_element_bit_stride / 8, nullptr, 1344 dwarf->GetUID(type_die), Type::eEncodingIsUID, &attrs.decl, clang_type, 1345 Type::ResolveState::Full); 1346 type_sp->SetEncodingType(element_type); 1347 const clang::Type *type = ClangUtil::GetQualType(clang_type).getTypePtr(); 1348 m_ast.SetMetadataAsUserID(type, die.GetID()); 1349 return type_sp; 1350 } 1351 1352 TypeSP DWARFASTParserClang::ParsePointerToMemberType( 1353 const DWARFDIE &die, const ParsedDWARFTypeAttributes &attrs) { 1354 SymbolFileDWARF *dwarf = die.GetDWARF(); 1355 Type *pointee_type = dwarf->ResolveTypeUID(attrs.type.Reference(), true); 1356 Type *class_type = 1357 dwarf->ResolveTypeUID(attrs.containing_type.Reference(), true); 1358 1359 CompilerType pointee_clang_type = pointee_type->GetForwardCompilerType(); 1360 CompilerType class_clang_type = class_type->GetLayoutCompilerType(); 1361 1362 CompilerType clang_type = TypeSystemClang::CreateMemberPointerType( 1363 class_clang_type, pointee_clang_type); 1364 1365 if (llvm::Optional<uint64_t> clang_type_size = 1366 clang_type.GetByteSize(nullptr)) { 1367 return std::make_shared<Type>(die.GetID(), dwarf, attrs.name, 1368 *clang_type_size, nullptr, LLDB_INVALID_UID, 1369 Type::eEncodingIsUID, nullptr, clang_type, 1370 Type::ResolveState::Forward); 1371 } 1372 return nullptr; 1373 } 1374 1375 TypeSP DWARFASTParserClang::UpdateSymbolContextScopeForType( 1376 const SymbolContext &sc, const DWARFDIE &die, TypeSP type_sp) { 1377 if (!type_sp) 1378 return type_sp; 1379 1380 SymbolFileDWARF *dwarf = die.GetDWARF(); 1381 TypeList &type_list = dwarf->GetTypeList(); 1382 DWARFDIE sc_parent_die = SymbolFileDWARF::GetParentSymbolContextDIE(die); 1383 dw_tag_t sc_parent_tag = sc_parent_die.Tag(); 1384 1385 SymbolContextScope *symbol_context_scope = nullptr; 1386 if (sc_parent_tag == DW_TAG_compile_unit || 1387 sc_parent_tag == DW_TAG_partial_unit) { 1388 symbol_context_scope = sc.comp_unit; 1389 } else if (sc.function != nullptr && sc_parent_die) { 1390 symbol_context_scope = 1391 sc.function->GetBlock(true).FindBlockByID(sc_parent_die.GetID()); 1392 if (symbol_context_scope == nullptr) 1393 symbol_context_scope = sc.function; 1394 } else { 1395 symbol_context_scope = sc.module_sp.get(); 1396 } 1397 1398 if (symbol_context_scope != nullptr) 1399 type_sp->SetSymbolContextScope(symbol_context_scope); 1400 1401 // We are ready to put this type into the uniqued list up at the module 1402 // level. 1403 type_list.Insert(type_sp); 1404 1405 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1406 return type_sp; 1407 } 1408 1409 TypeSP 1410 DWARFASTParserClang::ParseStructureLikeDIE(const SymbolContext &sc, 1411 const DWARFDIE &die, 1412 ParsedDWARFTypeAttributes &attrs) { 1413 TypeSP type_sp; 1414 CompilerType clang_type; 1415 const dw_tag_t tag = die.Tag(); 1416 SymbolFileDWARF *dwarf = die.GetDWARF(); 1417 LanguageType cu_language = SymbolFileDWARF::GetLanguage(*die.GetCU()); 1418 Log *log = LogChannelDWARF::GetLogIfAll(DWARF_LOG_TYPE_COMPLETION | 1419 DWARF_LOG_LOOKUPS); 1420 1421 // UniqueDWARFASTType is large, so don't create a local variables on the 1422 // stack, put it on the heap. This function is often called recursively and 1423 // clang isn't good at sharing the stack space for variables in different 1424 // blocks. 1425 auto unique_ast_entry_up = std::make_unique<UniqueDWARFASTType>(); 1426 1427 ConstString unique_typename(attrs.name); 1428 Declaration unique_decl(attrs.decl); 1429 1430 if (attrs.name) { 1431 if (Language::LanguageIsCPlusPlus(cu_language)) { 1432 // For C++, we rely solely upon the one definition rule that says 1433 // only one thing can exist at a given decl context. We ignore the 1434 // file and line that things are declared on. 1435 std::string qualified_name; 1436 if (die.GetQualifiedName(qualified_name)) 1437 unique_typename = ConstString(qualified_name); 1438 unique_decl.Clear(); 1439 } 1440 1441 if (dwarf->GetUniqueDWARFASTTypeMap().Find( 1442 unique_typename, die, unique_decl, attrs.byte_size.getValueOr(-1), 1443 *unique_ast_entry_up)) { 1444 type_sp = unique_ast_entry_up->m_type_sp; 1445 if (type_sp) { 1446 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1447 LinkDeclContextToDIE( 1448 GetCachedClangDeclContextForDIE(unique_ast_entry_up->m_die), die); 1449 return type_sp; 1450 } 1451 } 1452 } 1453 1454 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1455 DW_TAG_value_to_name(tag), type_name_cstr); 1456 1457 int tag_decl_kind = -1; 1458 AccessType default_accessibility = eAccessNone; 1459 if (tag == DW_TAG_structure_type) { 1460 tag_decl_kind = clang::TTK_Struct; 1461 default_accessibility = eAccessPublic; 1462 } else if (tag == DW_TAG_union_type) { 1463 tag_decl_kind = clang::TTK_Union; 1464 default_accessibility = eAccessPublic; 1465 } else if (tag == DW_TAG_class_type) { 1466 tag_decl_kind = clang::TTK_Class; 1467 default_accessibility = eAccessPrivate; 1468 } 1469 1470 if (attrs.byte_size && *attrs.byte_size == 0 && attrs.name && 1471 !die.HasChildren() && cu_language == eLanguageTypeObjC) { 1472 // Work around an issue with clang at the moment where forward 1473 // declarations for objective C classes are emitted as: 1474 // DW_TAG_structure_type [2] 1475 // DW_AT_name( "ForwardObjcClass" ) 1476 // DW_AT_byte_size( 0x00 ) 1477 // DW_AT_decl_file( "..." ) 1478 // DW_AT_decl_line( 1 ) 1479 // 1480 // Note that there is no DW_AT_declaration and there are no children, 1481 // and the byte size is zero. 1482 attrs.is_forward_declaration = true; 1483 } 1484 1485 if (attrs.class_language == eLanguageTypeObjC || 1486 attrs.class_language == eLanguageTypeObjC_plus_plus) { 1487 if (!attrs.is_complete_objc_class && 1488 die.Supports_DW_AT_APPLE_objc_complete_type()) { 1489 // We have a valid eSymbolTypeObjCClass class symbol whose name 1490 // matches the current objective C class that we are trying to find 1491 // and this DIE isn't the complete definition (we checked 1492 // is_complete_objc_class above and know it is false), so the real 1493 // definition is in here somewhere 1494 type_sp = 1495 dwarf->FindCompleteObjCDefinitionTypeForDIE(die, attrs.name, true); 1496 1497 if (!type_sp) { 1498 SymbolFileDWARFDebugMap *debug_map_symfile = 1499 dwarf->GetDebugMapSymfile(); 1500 if (debug_map_symfile) { 1501 // We weren't able to find a full declaration in this DWARF, 1502 // see if we have a declaration anywhere else... 1503 type_sp = debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE( 1504 die, attrs.name, true); 1505 } 1506 } 1507 1508 if (type_sp) { 1509 if (log) { 1510 dwarf->GetObjectFile()->GetModule()->LogMessage( 1511 log, 1512 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is an " 1513 "incomplete objc type, complete type is 0x%8.8" PRIx64, 1514 static_cast<void *>(this), die.GetOffset(), 1515 DW_TAG_value_to_name(tag), attrs.name.GetCString(), 1516 type_sp->GetID()); 1517 } 1518 1519 // We found a real definition for this type elsewhere so lets use 1520 // it and cache the fact that we found a complete type for this 1521 // die 1522 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1523 return type_sp; 1524 } 1525 } 1526 } 1527 1528 if (attrs.is_forward_declaration) { 1529 // We have a forward declaration to a type and we need to try and 1530 // find a full declaration. We look in the current type index just in 1531 // case we have a forward declaration followed by an actual 1532 // declarations in the DWARF. If this fails, we need to look 1533 // elsewhere... 1534 if (log) { 1535 dwarf->GetObjectFile()->GetModule()->LogMessage( 1536 log, 1537 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 1538 "forward declaration, trying to find complete type", 1539 static_cast<void *>(this), die.GetOffset(), DW_TAG_value_to_name(tag), 1540 attrs.name.GetCString()); 1541 } 1542 1543 // See if the type comes from a Clang module and if so, track down 1544 // that type. 1545 type_sp = ParseTypeFromClangModule(sc, die, log); 1546 if (type_sp) 1547 return type_sp; 1548 1549 DWARFDeclContext die_decl_ctx = SymbolFileDWARF::GetDWARFDeclContext(die); 1550 1551 // type_sp = FindDefinitionTypeForDIE (dwarf_cu, die, 1552 // type_name_const_str); 1553 type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx); 1554 1555 if (!type_sp) { 1556 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 1557 if (debug_map_symfile) { 1558 // We weren't able to find a full declaration in this DWARF, see 1559 // if we have a declaration anywhere else... 1560 type_sp = debug_map_symfile->FindDefinitionTypeForDWARFDeclContext( 1561 die_decl_ctx); 1562 } 1563 } 1564 1565 if (type_sp) { 1566 if (log) { 1567 dwarf->GetObjectFile()->GetModule()->LogMessage( 1568 log, 1569 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 1570 "forward declaration, complete type is 0x%8.8" PRIx64, 1571 static_cast<void *>(this), die.GetOffset(), 1572 DW_TAG_value_to_name(tag), attrs.name.GetCString(), 1573 type_sp->GetID()); 1574 } 1575 1576 // We found a real definition for this type elsewhere so lets use 1577 // it and cache the fact that we found a complete type for this die 1578 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1579 clang::DeclContext *defn_decl_ctx = 1580 GetCachedClangDeclContextForDIE(dwarf->GetDIE(type_sp->GetID())); 1581 if (defn_decl_ctx) 1582 LinkDeclContextToDIE(defn_decl_ctx, die); 1583 return type_sp; 1584 } 1585 } 1586 assert(tag_decl_kind != -1); 1587 bool clang_type_was_created = false; 1588 clang_type.SetCompilerType( 1589 &m_ast, dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE())); 1590 if (!clang_type) { 1591 clang::DeclContext *decl_ctx = 1592 GetClangDeclContextContainingDIE(die, nullptr); 1593 1594 PrepareContextToReceiveMembers(m_ast, GetClangASTImporter(), decl_ctx, die, 1595 attrs.name.GetCString()); 1596 1597 if (attrs.accessibility == eAccessNone && decl_ctx) { 1598 // Check the decl context that contains this class/struct/union. If 1599 // it is a class we must give it an accessibility. 1600 const clang::Decl::Kind containing_decl_kind = decl_ctx->getDeclKind(); 1601 if (DeclKindIsCXXClass(containing_decl_kind)) 1602 attrs.accessibility = default_accessibility; 1603 } 1604 1605 ClangASTMetadata metadata; 1606 metadata.SetUserID(die.GetID()); 1607 metadata.SetIsDynamicCXXType(dwarf->ClassOrStructIsVirtual(die)); 1608 1609 if (attrs.name.GetStringRef().contains('<')) { 1610 TypeSystemClang::TemplateParameterInfos template_param_infos; 1611 if (ParseTemplateParameterInfos(die, template_param_infos)) { 1612 clang::ClassTemplateDecl *class_template_decl = 1613 m_ast.ParseClassTemplateDecl( 1614 decl_ctx, GetOwningClangModule(die), attrs.accessibility, 1615 attrs.name.GetCString(), tag_decl_kind, template_param_infos); 1616 if (!class_template_decl) { 1617 if (log) { 1618 dwarf->GetObjectFile()->GetModule()->LogMessage( 1619 log, 1620 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" " 1621 "clang::ClassTemplateDecl failed to return a decl.", 1622 static_cast<void *>(this), die.GetOffset(), 1623 DW_TAG_value_to_name(tag), attrs.name.GetCString()); 1624 } 1625 return TypeSP(); 1626 } 1627 1628 clang::ClassTemplateSpecializationDecl *class_specialization_decl = 1629 m_ast.CreateClassTemplateSpecializationDecl( 1630 decl_ctx, GetOwningClangModule(die), class_template_decl, 1631 tag_decl_kind, template_param_infos); 1632 clang_type = m_ast.CreateClassTemplateSpecializationType( 1633 class_specialization_decl); 1634 clang_type_was_created = true; 1635 1636 m_ast.SetMetadata(class_template_decl, metadata); 1637 m_ast.SetMetadata(class_specialization_decl, metadata); 1638 } 1639 } 1640 1641 if (!clang_type_was_created) { 1642 clang_type_was_created = true; 1643 clang_type = m_ast.CreateRecordType( 1644 decl_ctx, GetOwningClangModule(die), attrs.accessibility, 1645 attrs.name.GetCString(), tag_decl_kind, attrs.class_language, 1646 &metadata, attrs.exports_symbols); 1647 } 1648 } 1649 1650 // Store a forward declaration to this class type in case any 1651 // parameters in any class methods need it for the clang types for 1652 // function prototypes. 1653 LinkDeclContextToDIE(m_ast.GetDeclContextForType(clang_type), die); 1654 type_sp = std::make_shared<Type>( 1655 die.GetID(), dwarf, attrs.name, attrs.byte_size, nullptr, 1656 LLDB_INVALID_UID, Type::eEncodingIsUID, &attrs.decl, clang_type, 1657 Type::ResolveState::Forward, 1658 TypePayloadClang(OptionalClangModuleID(), attrs.is_complete_objc_class)); 1659 1660 // Add our type to the unique type map so we don't end up creating many 1661 // copies of the same type over and over in the ASTContext for our 1662 // module 1663 unique_ast_entry_up->m_type_sp = type_sp; 1664 unique_ast_entry_up->m_die = die; 1665 unique_ast_entry_up->m_declaration = unique_decl; 1666 unique_ast_entry_up->m_byte_size = attrs.byte_size.getValueOr(0); 1667 dwarf->GetUniqueDWARFASTTypeMap().Insert(unique_typename, 1668 *unique_ast_entry_up); 1669 1670 if (!attrs.is_forward_declaration) { 1671 // Always start the definition for a class type so that if the class 1672 // has child classes or types that require the class to be created 1673 // for use as their decl contexts the class will be ready to accept 1674 // these child definitions. 1675 if (!die.HasChildren()) { 1676 // No children for this struct/union/class, lets finish it 1677 if (TypeSystemClang::StartTagDeclarationDefinition(clang_type)) { 1678 TypeSystemClang::CompleteTagDeclarationDefinition(clang_type); 1679 } else { 1680 dwarf->GetObjectFile()->GetModule()->ReportError( 1681 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 1682 "definition.\nPlease file a bug and attach the file at the " 1683 "start of this error message", 1684 die.GetOffset(), attrs.name.GetCString()); 1685 } 1686 1687 if (tag == DW_TAG_structure_type) // this only applies in C 1688 { 1689 clang::RecordDecl *record_decl = 1690 TypeSystemClang::GetAsRecordDecl(clang_type); 1691 1692 if (record_decl) { 1693 GetClangASTImporter().SetRecordLayout( 1694 record_decl, ClangASTImporter::LayoutInfo()); 1695 } 1696 } 1697 } else if (clang_type_was_created) { 1698 // Start the definition if the class is not objective C since the 1699 // underlying decls respond to isCompleteDefinition(). Objective 1700 // C decls don't respond to isCompleteDefinition() so we can't 1701 // start the declaration definition right away. For C++ 1702 // class/union/structs we want to start the definition in case the 1703 // class is needed as the declaration context for a contained class 1704 // or type without the need to complete that type.. 1705 1706 if (attrs.class_language != eLanguageTypeObjC && 1707 attrs.class_language != eLanguageTypeObjC_plus_plus) 1708 TypeSystemClang::StartTagDeclarationDefinition(clang_type); 1709 1710 // Leave this as a forward declaration until we need to know the 1711 // details of the type. lldb_private::Type will automatically call 1712 // the SymbolFile virtual function 1713 // "SymbolFileDWARF::CompleteType(Type *)" When the definition 1714 // needs to be defined. 1715 assert(!dwarf->GetForwardDeclClangTypeToDie().count( 1716 ClangUtil::RemoveFastQualifiers(clang_type) 1717 .GetOpaqueQualType()) && 1718 "Type already in the forward declaration map!"); 1719 // Can't assume m_ast.GetSymbolFile() is actually a 1720 // SymbolFileDWARF, it can be a SymbolFileDWARFDebugMap for Apple 1721 // binaries. 1722 dwarf->GetForwardDeclDieToClangType()[die.GetDIE()] = 1723 clang_type.GetOpaqueQualType(); 1724 dwarf->GetForwardDeclClangTypeToDie().try_emplace( 1725 ClangUtil::RemoveFastQualifiers(clang_type).GetOpaqueQualType(), 1726 *die.GetDIERef()); 1727 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), true); 1728 } 1729 } 1730 1731 // If we made a clang type, set the trivial abi if applicable: We only 1732 // do this for pass by value - which implies the Trivial ABI. There 1733 // isn't a way to assert that something that would normally be pass by 1734 // value is pass by reference, so we ignore that attribute if set. 1735 if (attrs.calling_convention == llvm::dwarf::DW_CC_pass_by_value) { 1736 clang::CXXRecordDecl *record_decl = 1737 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 1738 if (record_decl && record_decl->getDefinition()) { 1739 record_decl->setHasTrivialSpecialMemberForCall(); 1740 } 1741 } 1742 1743 if (attrs.calling_convention == llvm::dwarf::DW_CC_pass_by_reference) { 1744 clang::CXXRecordDecl *record_decl = 1745 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 1746 if (record_decl) 1747 record_decl->setArgPassingRestrictions( 1748 clang::RecordDecl::APK_CannotPassInRegs); 1749 } 1750 return type_sp; 1751 } 1752 1753 // DWARF parsing functions 1754 1755 class DWARFASTParserClang::DelayedAddObjCClassProperty { 1756 public: 1757 DelayedAddObjCClassProperty( 1758 const CompilerType &class_opaque_type, const char *property_name, 1759 const CompilerType &property_opaque_type, // The property type is only 1760 // required if you don't have an 1761 // ivar decl 1762 clang::ObjCIvarDecl *ivar_decl, const char *property_setter_name, 1763 const char *property_getter_name, uint32_t property_attributes, 1764 const ClangASTMetadata *metadata) 1765 : m_class_opaque_type(class_opaque_type), m_property_name(property_name), 1766 m_property_opaque_type(property_opaque_type), m_ivar_decl(ivar_decl), 1767 m_property_setter_name(property_setter_name), 1768 m_property_getter_name(property_getter_name), 1769 m_property_attributes(property_attributes) { 1770 if (metadata != nullptr) { 1771 m_metadata_up = std::make_unique<ClangASTMetadata>(); 1772 *m_metadata_up = *metadata; 1773 } 1774 } 1775 1776 DelayedAddObjCClassProperty(const DelayedAddObjCClassProperty &rhs) { 1777 *this = rhs; 1778 } 1779 1780 DelayedAddObjCClassProperty & 1781 operator=(const DelayedAddObjCClassProperty &rhs) { 1782 m_class_opaque_type = rhs.m_class_opaque_type; 1783 m_property_name = rhs.m_property_name; 1784 m_property_opaque_type = rhs.m_property_opaque_type; 1785 m_ivar_decl = rhs.m_ivar_decl; 1786 m_property_setter_name = rhs.m_property_setter_name; 1787 m_property_getter_name = rhs.m_property_getter_name; 1788 m_property_attributes = rhs.m_property_attributes; 1789 1790 if (rhs.m_metadata_up) { 1791 m_metadata_up = std::make_unique<ClangASTMetadata>(); 1792 *m_metadata_up = *rhs.m_metadata_up; 1793 } 1794 return *this; 1795 } 1796 1797 bool Finalize() { 1798 return TypeSystemClang::AddObjCClassProperty( 1799 m_class_opaque_type, m_property_name, m_property_opaque_type, 1800 m_ivar_decl, m_property_setter_name, m_property_getter_name, 1801 m_property_attributes, m_metadata_up.get()); 1802 } 1803 1804 private: 1805 CompilerType m_class_opaque_type; 1806 const char *m_property_name; 1807 CompilerType m_property_opaque_type; 1808 clang::ObjCIvarDecl *m_ivar_decl; 1809 const char *m_property_setter_name; 1810 const char *m_property_getter_name; 1811 uint32_t m_property_attributes; 1812 std::unique_ptr<ClangASTMetadata> m_metadata_up; 1813 }; 1814 1815 bool DWARFASTParserClang::ParseTemplateDIE( 1816 const DWARFDIE &die, 1817 TypeSystemClang::TemplateParameterInfos &template_param_infos) { 1818 const dw_tag_t tag = die.Tag(); 1819 bool is_template_template_argument = false; 1820 1821 switch (tag) { 1822 case DW_TAG_GNU_template_parameter_pack: { 1823 template_param_infos.packed_args = 1824 std::make_unique<TypeSystemClang::TemplateParameterInfos>(); 1825 for (DWARFDIE child_die = die.GetFirstChild(); child_die.IsValid(); 1826 child_die = child_die.GetSibling()) { 1827 if (!ParseTemplateDIE(child_die, *template_param_infos.packed_args)) 1828 return false; 1829 } 1830 if (const char *name = die.GetName()) { 1831 template_param_infos.pack_name = name; 1832 } 1833 return true; 1834 } 1835 case DW_TAG_GNU_template_template_param: 1836 is_template_template_argument = true; 1837 LLVM_FALLTHROUGH; 1838 case DW_TAG_template_type_parameter: 1839 case DW_TAG_template_value_parameter: { 1840 DWARFAttributes attributes; 1841 const size_t num_attributes = die.GetAttributes(attributes); 1842 const char *name = nullptr; 1843 const char *template_name = nullptr; 1844 CompilerType clang_type; 1845 uint64_t uval64 = 0; 1846 bool uval64_valid = false; 1847 if (num_attributes > 0) { 1848 DWARFFormValue form_value; 1849 for (size_t i = 0; i < num_attributes; ++i) { 1850 const dw_attr_t attr = attributes.AttributeAtIndex(i); 1851 1852 switch (attr) { 1853 case DW_AT_name: 1854 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1855 name = form_value.AsCString(); 1856 break; 1857 1858 case DW_AT_GNU_template_name: 1859 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1860 template_name = form_value.AsCString(); 1861 break; 1862 1863 case DW_AT_type: 1864 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1865 Type *lldb_type = die.ResolveTypeUID(form_value.Reference()); 1866 if (lldb_type) 1867 clang_type = lldb_type->GetForwardCompilerType(); 1868 } 1869 break; 1870 1871 case DW_AT_const_value: 1872 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1873 uval64_valid = true; 1874 uval64 = form_value.Unsigned(); 1875 } 1876 break; 1877 default: 1878 break; 1879 } 1880 } 1881 1882 clang::ASTContext &ast = m_ast.getASTContext(); 1883 if (!clang_type) 1884 clang_type = m_ast.GetBasicType(eBasicTypeVoid); 1885 1886 if (!is_template_template_argument) { 1887 bool is_signed = false; 1888 if (name && name[0]) 1889 template_param_infos.names.push_back(name); 1890 else 1891 template_param_infos.names.push_back(NULL); 1892 1893 // Get the signed value for any integer or enumeration if available 1894 clang_type.IsIntegerOrEnumerationType(is_signed); 1895 1896 if (tag == DW_TAG_template_value_parameter && uval64_valid) { 1897 llvm::Optional<uint64_t> size = clang_type.GetBitSize(nullptr); 1898 if (!size) 1899 return false; 1900 llvm::APInt apint(*size, uval64, is_signed); 1901 template_param_infos.args.push_back( 1902 clang::TemplateArgument(ast, llvm::APSInt(apint, !is_signed), 1903 ClangUtil::GetQualType(clang_type))); 1904 } else { 1905 template_param_infos.args.push_back( 1906 clang::TemplateArgument(ClangUtil::GetQualType(clang_type))); 1907 } 1908 } else { 1909 auto *tplt_type = m_ast.CreateTemplateTemplateParmDecl(template_name); 1910 template_param_infos.names.push_back(name); 1911 template_param_infos.args.push_back( 1912 clang::TemplateArgument(clang::TemplateName(tplt_type))); 1913 } 1914 } 1915 } 1916 return true; 1917 1918 default: 1919 break; 1920 } 1921 return false; 1922 } 1923 1924 bool DWARFASTParserClang::ParseTemplateParameterInfos( 1925 const DWARFDIE &parent_die, 1926 TypeSystemClang::TemplateParameterInfos &template_param_infos) { 1927 1928 if (!parent_die) 1929 return false; 1930 1931 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 1932 die = die.GetSibling()) { 1933 const dw_tag_t tag = die.Tag(); 1934 1935 switch (tag) { 1936 case DW_TAG_template_type_parameter: 1937 case DW_TAG_template_value_parameter: 1938 case DW_TAG_GNU_template_parameter_pack: 1939 case DW_TAG_GNU_template_template_param: 1940 ParseTemplateDIE(die, template_param_infos); 1941 break; 1942 1943 default: 1944 break; 1945 } 1946 } 1947 return template_param_infos.args.size() == template_param_infos.names.size(); 1948 } 1949 1950 bool DWARFASTParserClang::CompleteRecordType(const DWARFDIE &die, 1951 lldb_private::Type *type, 1952 CompilerType &clang_type) { 1953 const dw_tag_t tag = die.Tag(); 1954 SymbolFileDWARF *dwarf = die.GetDWARF(); 1955 1956 ClangASTImporter::LayoutInfo layout_info; 1957 1958 if (die.HasChildren()) { 1959 const bool type_is_objc_object_or_interface = 1960 TypeSystemClang::IsObjCObjectOrInterfaceType(clang_type); 1961 if (type_is_objc_object_or_interface) { 1962 // For objective C we don't start the definition when the class is 1963 // created. 1964 TypeSystemClang::StartTagDeclarationDefinition(clang_type); 1965 } 1966 1967 int tag_decl_kind = -1; 1968 AccessType default_accessibility = eAccessNone; 1969 if (tag == DW_TAG_structure_type) { 1970 tag_decl_kind = clang::TTK_Struct; 1971 default_accessibility = eAccessPublic; 1972 } else if (tag == DW_TAG_union_type) { 1973 tag_decl_kind = clang::TTK_Union; 1974 default_accessibility = eAccessPublic; 1975 } else if (tag == DW_TAG_class_type) { 1976 tag_decl_kind = clang::TTK_Class; 1977 default_accessibility = eAccessPrivate; 1978 } 1979 1980 std::vector<std::unique_ptr<clang::CXXBaseSpecifier>> bases; 1981 std::vector<int> member_accessibilities; 1982 bool is_a_class = false; 1983 // Parse members and base classes first 1984 std::vector<DWARFDIE> member_function_dies; 1985 1986 DelayedPropertyList delayed_properties; 1987 ParseChildMembers(die, clang_type, bases, member_accessibilities, 1988 member_function_dies, delayed_properties, 1989 default_accessibility, is_a_class, layout_info); 1990 1991 // Now parse any methods if there were any... 1992 for (const DWARFDIE &die : member_function_dies) 1993 dwarf->ResolveType(die); 1994 1995 if (type_is_objc_object_or_interface) { 1996 ConstString class_name(clang_type.GetTypeName()); 1997 if (class_name) { 1998 dwarf->GetObjCMethods(class_name, [&](DWARFDIE method_die) { 1999 method_die.ResolveType(); 2000 return true; 2001 }); 2002 2003 for (DelayedPropertyList::iterator pi = delayed_properties.begin(), 2004 pe = delayed_properties.end(); 2005 pi != pe; ++pi) 2006 pi->Finalize(); 2007 } 2008 } 2009 2010 // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we 2011 // need to tell the clang type it is actually a class. 2012 if (!type_is_objc_object_or_interface) { 2013 if (is_a_class && tag_decl_kind != clang::TTK_Class) 2014 m_ast.SetTagTypeKind(ClangUtil::GetQualType(clang_type), 2015 clang::TTK_Class); 2016 } 2017 2018 // Since DW_TAG_structure_type gets used for both classes and 2019 // structures, we may need to set any DW_TAG_member fields to have a 2020 // "private" access if none was specified. When we parsed the child 2021 // members we tracked that actual accessibility value for each 2022 // DW_TAG_member in the "member_accessibilities" array. If the value 2023 // for the member is zero, then it was set to the 2024 // "default_accessibility" which for structs was "public". Below we 2025 // correct this by setting any fields to "private" that weren't 2026 // correctly set. 2027 if (is_a_class && !member_accessibilities.empty()) { 2028 // This is a class and all members that didn't have their access 2029 // specified are private. 2030 m_ast.SetDefaultAccessForRecordFields( 2031 m_ast.GetAsRecordDecl(clang_type), eAccessPrivate, 2032 &member_accessibilities.front(), member_accessibilities.size()); 2033 } 2034 2035 if (!bases.empty()) { 2036 // Make sure all base classes refer to complete types and not forward 2037 // declarations. If we don't do this, clang will crash with an 2038 // assertion in the call to clang_type.TransferBaseClasses() 2039 for (const auto &base_class : bases) { 2040 clang::TypeSourceInfo *type_source_info = 2041 base_class->getTypeSourceInfo(); 2042 if (type_source_info) 2043 RequireCompleteType(m_ast.GetType(type_source_info->getType())); 2044 } 2045 2046 m_ast.TransferBaseClasses(clang_type.GetOpaqueQualType(), 2047 std::move(bases)); 2048 } 2049 } 2050 2051 m_ast.AddMethodOverridesForCXXRecordType(clang_type.GetOpaqueQualType()); 2052 TypeSystemClang::BuildIndirectFields(clang_type); 2053 TypeSystemClang::CompleteTagDeclarationDefinition(clang_type); 2054 2055 if (!layout_info.field_offsets.empty() || !layout_info.base_offsets.empty() || 2056 !layout_info.vbase_offsets.empty()) { 2057 if (type) 2058 layout_info.bit_size = type->GetByteSize(nullptr).getValueOr(0) * 8; 2059 if (layout_info.bit_size == 0) 2060 layout_info.bit_size = 2061 die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 0) * 8; 2062 2063 clang::CXXRecordDecl *record_decl = 2064 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 2065 if (record_decl) 2066 GetClangASTImporter().SetRecordLayout(record_decl, layout_info); 2067 } 2068 2069 return (bool)clang_type; 2070 } 2071 2072 bool DWARFASTParserClang::CompleteEnumType(const DWARFDIE &die, 2073 lldb_private::Type *type, 2074 CompilerType &clang_type) { 2075 if (TypeSystemClang::StartTagDeclarationDefinition(clang_type)) { 2076 if (die.HasChildren()) { 2077 bool is_signed = false; 2078 clang_type.IsIntegerType(is_signed); 2079 ParseChildEnumerators(clang_type, is_signed, 2080 type->GetByteSize(nullptr).getValueOr(0), die); 2081 } 2082 TypeSystemClang::CompleteTagDeclarationDefinition(clang_type); 2083 } 2084 return (bool)clang_type; 2085 } 2086 2087 bool DWARFASTParserClang::CompleteTypeFromDWARF(const DWARFDIE &die, 2088 lldb_private::Type *type, 2089 CompilerType &clang_type) { 2090 SymbolFileDWARF *dwarf = die.GetDWARF(); 2091 2092 std::lock_guard<std::recursive_mutex> guard( 2093 dwarf->GetObjectFile()->GetModule()->GetMutex()); 2094 2095 // Disable external storage for this type so we don't get anymore 2096 // clang::ExternalASTSource queries for this type. 2097 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), false); 2098 2099 if (!die) 2100 return false; 2101 2102 const dw_tag_t tag = die.Tag(); 2103 2104 Log *log = 2105 nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION)); 2106 if (log) 2107 dwarf->GetObjectFile()->GetModule()->LogMessageVerboseBacktrace( 2108 log, "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...", 2109 die.GetID(), die.GetTagAsCString(), type->GetName().AsCString()); 2110 assert(clang_type); 2111 DWARFAttributes attributes; 2112 switch (tag) { 2113 case DW_TAG_structure_type: 2114 case DW_TAG_union_type: 2115 case DW_TAG_class_type: 2116 return CompleteRecordType(die, type, clang_type); 2117 case DW_TAG_enumeration_type: 2118 return CompleteEnumType(die, type, clang_type); 2119 default: 2120 assert(false && "not a forward clang type decl!"); 2121 break; 2122 } 2123 2124 return false; 2125 } 2126 2127 void DWARFASTParserClang::EnsureAllDIEsInDeclContextHaveBeenParsed( 2128 lldb_private::CompilerDeclContext decl_context) { 2129 auto opaque_decl_ctx = 2130 (clang::DeclContext *)decl_context.GetOpaqueDeclContext(); 2131 for (auto it = m_decl_ctx_to_die.find(opaque_decl_ctx); 2132 it != m_decl_ctx_to_die.end() && it->first == opaque_decl_ctx; 2133 it = m_decl_ctx_to_die.erase(it)) 2134 for (DWARFDIE decl = it->second.GetFirstChild(); decl; 2135 decl = decl.GetSibling()) 2136 GetClangDeclForDIE(decl); 2137 } 2138 2139 CompilerDecl DWARFASTParserClang::GetDeclForUIDFromDWARF(const DWARFDIE &die) { 2140 clang::Decl *clang_decl = GetClangDeclForDIE(die); 2141 if (clang_decl != nullptr) 2142 return m_ast.GetCompilerDecl(clang_decl); 2143 return CompilerDecl(); 2144 } 2145 2146 CompilerDeclContext 2147 DWARFASTParserClang::GetDeclContextForUIDFromDWARF(const DWARFDIE &die) { 2148 clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE(die); 2149 if (clang_decl_ctx) 2150 return m_ast.CreateDeclContext(clang_decl_ctx); 2151 return CompilerDeclContext(); 2152 } 2153 2154 CompilerDeclContext 2155 DWARFASTParserClang::GetDeclContextContainingUIDFromDWARF(const DWARFDIE &die) { 2156 clang::DeclContext *clang_decl_ctx = 2157 GetClangDeclContextContainingDIE(die, nullptr); 2158 if (clang_decl_ctx) 2159 return m_ast.CreateDeclContext(clang_decl_ctx); 2160 return CompilerDeclContext(); 2161 } 2162 2163 size_t DWARFASTParserClang::ParseChildEnumerators( 2164 lldb_private::CompilerType &clang_type, bool is_signed, 2165 uint32_t enumerator_byte_size, const DWARFDIE &parent_die) { 2166 if (!parent_die) 2167 return 0; 2168 2169 size_t enumerators_added = 0; 2170 2171 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2172 die = die.GetSibling()) { 2173 const dw_tag_t tag = die.Tag(); 2174 if (tag == DW_TAG_enumerator) { 2175 DWARFAttributes attributes; 2176 const size_t num_child_attributes = die.GetAttributes(attributes); 2177 if (num_child_attributes > 0) { 2178 const char *name = nullptr; 2179 bool got_value = false; 2180 int64_t enum_value = 0; 2181 Declaration decl; 2182 2183 uint32_t i; 2184 for (i = 0; i < num_child_attributes; ++i) { 2185 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2186 DWARFFormValue form_value; 2187 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2188 switch (attr) { 2189 case DW_AT_const_value: 2190 got_value = true; 2191 if (is_signed) 2192 enum_value = form_value.Signed(); 2193 else 2194 enum_value = form_value.Unsigned(); 2195 break; 2196 2197 case DW_AT_name: 2198 name = form_value.AsCString(); 2199 break; 2200 2201 case DW_AT_description: 2202 default: 2203 case DW_AT_decl_file: 2204 decl.SetFile(die.GetCU()->GetFile(form_value.Unsigned())); 2205 break; 2206 case DW_AT_decl_line: 2207 decl.SetLine(form_value.Unsigned()); 2208 break; 2209 case DW_AT_decl_column: 2210 decl.SetColumn(form_value.Unsigned()); 2211 break; 2212 case DW_AT_sibling: 2213 break; 2214 } 2215 } 2216 } 2217 2218 if (name && name[0] && got_value) { 2219 m_ast.AddEnumerationValueToEnumerationType( 2220 clang_type, decl, name, enum_value, enumerator_byte_size * 8); 2221 ++enumerators_added; 2222 } 2223 } 2224 } 2225 } 2226 return enumerators_added; 2227 } 2228 2229 Function *DWARFASTParserClang::ParseFunctionFromDWARF(CompileUnit &comp_unit, 2230 const DWARFDIE &die) { 2231 DWARFRangeList func_ranges; 2232 const char *name = nullptr; 2233 const char *mangled = nullptr; 2234 int decl_file = 0; 2235 int decl_line = 0; 2236 int decl_column = 0; 2237 int call_file = 0; 2238 int call_line = 0; 2239 int call_column = 0; 2240 DWARFExpression frame_base; 2241 2242 const dw_tag_t tag = die.Tag(); 2243 2244 if (tag != DW_TAG_subprogram) 2245 return nullptr; 2246 2247 if (die.GetDIENamesAndRanges(name, mangled, func_ranges, decl_file, decl_line, 2248 decl_column, call_file, call_line, call_column, 2249 &frame_base)) { 2250 2251 // Union of all ranges in the function DIE (if the function is 2252 // discontiguous) 2253 AddressRange func_range; 2254 lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase(0); 2255 lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd(0); 2256 if (lowest_func_addr != LLDB_INVALID_ADDRESS && 2257 lowest_func_addr <= highest_func_addr) { 2258 ModuleSP module_sp(die.GetModule()); 2259 func_range.GetBaseAddress().ResolveAddressUsingFileSections( 2260 lowest_func_addr, module_sp->GetSectionList()); 2261 if (func_range.GetBaseAddress().IsValid()) 2262 func_range.SetByteSize(highest_func_addr - lowest_func_addr); 2263 } 2264 2265 if (func_range.GetBaseAddress().IsValid()) { 2266 Mangled func_name; 2267 if (mangled) 2268 func_name.SetValue(ConstString(mangled), true); 2269 else if ((die.GetParent().Tag() == DW_TAG_compile_unit || 2270 die.GetParent().Tag() == DW_TAG_partial_unit) && 2271 Language::LanguageIsCPlusPlus( 2272 SymbolFileDWARF::GetLanguage(*die.GetCU())) && 2273 !Language::LanguageIsObjC( 2274 SymbolFileDWARF::GetLanguage(*die.GetCU())) && 2275 name && strcmp(name, "main") != 0) { 2276 // If the mangled name is not present in the DWARF, generate the 2277 // demangled name using the decl context. We skip if the function is 2278 // "main" as its name is never mangled. 2279 bool is_static = false; 2280 bool is_variadic = false; 2281 bool has_template_params = false; 2282 unsigned type_quals = 0; 2283 std::vector<CompilerType> param_types; 2284 std::vector<clang::ParmVarDecl *> param_decls; 2285 StreamString sstr; 2286 2287 DWARFDeclContext decl_ctx = SymbolFileDWARF::GetDWARFDeclContext(die); 2288 sstr << decl_ctx.GetQualifiedName(); 2289 2290 clang::DeclContext *containing_decl_ctx = 2291 GetClangDeclContextContainingDIE(die, nullptr); 2292 ParseChildParameters(containing_decl_ctx, die, true, is_static, 2293 is_variadic, has_template_params, param_types, 2294 param_decls, type_quals); 2295 sstr << "("; 2296 for (size_t i = 0; i < param_types.size(); i++) { 2297 if (i > 0) 2298 sstr << ", "; 2299 sstr << param_types[i].GetTypeName(); 2300 } 2301 if (is_variadic) 2302 sstr << ", ..."; 2303 sstr << ")"; 2304 if (type_quals & clang::Qualifiers::Const) 2305 sstr << " const"; 2306 2307 func_name.SetValue(ConstString(sstr.GetString()), false); 2308 } else 2309 func_name.SetValue(ConstString(name), false); 2310 2311 FunctionSP func_sp; 2312 std::unique_ptr<Declaration> decl_up; 2313 if (decl_file != 0 || decl_line != 0 || decl_column != 0) 2314 decl_up = std::make_unique<Declaration>(die.GetCU()->GetFile(decl_file), 2315 decl_line, decl_column); 2316 2317 SymbolFileDWARF *dwarf = die.GetDWARF(); 2318 // Supply the type _only_ if it has already been parsed 2319 Type *func_type = dwarf->GetDIEToType().lookup(die.GetDIE()); 2320 2321 assert(func_type == nullptr || func_type != DIE_IS_BEING_PARSED); 2322 2323 if (dwarf->FixupAddress(func_range.GetBaseAddress())) { 2324 const user_id_t func_user_id = die.GetID(); 2325 func_sp = 2326 std::make_shared<Function>(&comp_unit, 2327 func_user_id, // UserID is the DIE offset 2328 func_user_id, func_name, func_type, 2329 func_range); // first address range 2330 2331 if (func_sp.get() != nullptr) { 2332 if (frame_base.IsValid()) 2333 func_sp->GetFrameBaseExpression() = frame_base; 2334 comp_unit.AddFunction(func_sp); 2335 return func_sp.get(); 2336 } 2337 } 2338 } 2339 } 2340 return nullptr; 2341 } 2342 2343 void DWARFASTParserClang::ParseSingleMember( 2344 const DWARFDIE &die, const DWARFDIE &parent_die, 2345 const lldb_private::CompilerType &class_clang_type, 2346 std::vector<int> &member_accessibilities, 2347 lldb::AccessType default_accessibility, 2348 DelayedPropertyList &delayed_properties, 2349 lldb_private::ClangASTImporter::LayoutInfo &layout_info, 2350 FieldInfo &last_field_info) { 2351 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule(); 2352 const dw_tag_t tag = die.Tag(); 2353 // Get the parent byte size so we can verify any members will fit 2354 const uint64_t parent_byte_size = 2355 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, UINT64_MAX); 2356 const uint64_t parent_bit_size = 2357 parent_byte_size == UINT64_MAX ? UINT64_MAX : parent_byte_size * 8; 2358 2359 DWARFAttributes attributes; 2360 const size_t num_attributes = die.GetAttributes(attributes); 2361 if (num_attributes == 0) 2362 return; 2363 2364 const char *name = nullptr; 2365 const char *prop_name = nullptr; 2366 const char *prop_getter_name = nullptr; 2367 const char *prop_setter_name = nullptr; 2368 uint32_t prop_attributes = 0; 2369 2370 bool is_artificial = false; 2371 DWARFFormValue encoding_form; 2372 AccessType accessibility = eAccessNone; 2373 uint32_t member_byte_offset = 2374 (parent_die.Tag() == DW_TAG_union_type) ? 0 : UINT32_MAX; 2375 llvm::Optional<uint64_t> byte_size; 2376 int64_t bit_offset = 0; 2377 uint64_t data_bit_offset = UINT64_MAX; 2378 size_t bit_size = 0; 2379 bool is_external = 2380 false; // On DW_TAG_members, this means the member is static 2381 uint32_t i; 2382 for (i = 0; i < num_attributes && !is_artificial; ++i) { 2383 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2384 DWARFFormValue form_value; 2385 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2386 // DW_AT_data_member_location indicates the byte offset of the 2387 // word from the base address of the structure. 2388 // 2389 // DW_AT_bit_offset indicates how many bits into the word 2390 // (according to the host endianness) the low-order bit of the 2391 // field starts. AT_bit_offset can be negative. 2392 // 2393 // DW_AT_bit_size indicates the size of the field in bits. 2394 switch (attr) { 2395 case DW_AT_name: 2396 name = form_value.AsCString(); 2397 break; 2398 case DW_AT_type: 2399 encoding_form = form_value; 2400 break; 2401 case DW_AT_bit_offset: 2402 bit_offset = form_value.Signed(); 2403 break; 2404 case DW_AT_bit_size: 2405 bit_size = form_value.Unsigned(); 2406 break; 2407 case DW_AT_byte_size: 2408 byte_size = form_value.Unsigned(); 2409 break; 2410 case DW_AT_data_bit_offset: 2411 data_bit_offset = form_value.Unsigned(); 2412 break; 2413 case DW_AT_data_member_location: 2414 if (form_value.BlockData()) { 2415 Value initialValue(0); 2416 Value memberOffset(0); 2417 const DWARFDataExtractor &debug_info_data = die.GetData(); 2418 uint32_t block_length = form_value.Unsigned(); 2419 uint32_t block_offset = 2420 form_value.BlockData() - debug_info_data.GetDataStart(); 2421 if (DWARFExpression::Evaluate( 2422 nullptr, // ExecutionContext * 2423 nullptr, // RegisterContext * 2424 module_sp, 2425 DataExtractor(debug_info_data, block_offset, block_length), 2426 die.GetCU(), eRegisterKindDWARF, &initialValue, nullptr, 2427 memberOffset, nullptr)) { 2428 member_byte_offset = memberOffset.ResolveValue(nullptr).UInt(); 2429 } 2430 } else { 2431 // With DWARF 3 and later, if the value is an integer constant, 2432 // this form value is the offset in bytes from the beginning of 2433 // the containing entity. 2434 member_byte_offset = form_value.Unsigned(); 2435 } 2436 break; 2437 2438 case DW_AT_accessibility: 2439 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 2440 break; 2441 case DW_AT_artificial: 2442 is_artificial = form_value.Boolean(); 2443 break; 2444 case DW_AT_APPLE_property_name: 2445 prop_name = form_value.AsCString(); 2446 break; 2447 case DW_AT_APPLE_property_getter: 2448 prop_getter_name = form_value.AsCString(); 2449 break; 2450 case DW_AT_APPLE_property_setter: 2451 prop_setter_name = form_value.AsCString(); 2452 break; 2453 case DW_AT_APPLE_property_attribute: 2454 prop_attributes = form_value.Unsigned(); 2455 break; 2456 case DW_AT_external: 2457 is_external = form_value.Boolean(); 2458 break; 2459 2460 default: 2461 case DW_AT_declaration: 2462 case DW_AT_description: 2463 case DW_AT_mutable: 2464 case DW_AT_visibility: 2465 case DW_AT_sibling: 2466 break; 2467 } 2468 } 2469 } 2470 2471 if (prop_name) { 2472 ConstString fixed_setter; 2473 2474 // Check if the property getter/setter were provided as full names. 2475 // We want basenames, so we extract them. 2476 2477 if (prop_getter_name && prop_getter_name[0] == '-') { 2478 ObjCLanguage::MethodName prop_getter_method(prop_getter_name, true); 2479 prop_getter_name = prop_getter_method.GetSelector().GetCString(); 2480 } 2481 2482 if (prop_setter_name && prop_setter_name[0] == '-') { 2483 ObjCLanguage::MethodName prop_setter_method(prop_setter_name, true); 2484 prop_setter_name = prop_setter_method.GetSelector().GetCString(); 2485 } 2486 2487 // If the names haven't been provided, they need to be filled in. 2488 2489 if (!prop_getter_name) { 2490 prop_getter_name = prop_name; 2491 } 2492 if (!prop_setter_name && prop_name[0] && 2493 !(prop_attributes & DW_APPLE_PROPERTY_readonly)) { 2494 StreamString ss; 2495 2496 ss.Printf("set%c%s:", toupper(prop_name[0]), &prop_name[1]); 2497 2498 fixed_setter.SetString(ss.GetString()); 2499 prop_setter_name = fixed_setter.GetCString(); 2500 } 2501 } 2502 2503 // Clang has a DWARF generation bug where sometimes it represents 2504 // fields that are references with bad byte size and bit size/offset 2505 // information such as: 2506 // 2507 // DW_AT_byte_size( 0x00 ) 2508 // DW_AT_bit_size( 0x40 ) 2509 // DW_AT_bit_offset( 0xffffffffffffffc0 ) 2510 // 2511 // So check the bit offset to make sure it is sane, and if the values 2512 // are not sane, remove them. If we don't do this then we will end up 2513 // with a crash if we try to use this type in an expression when clang 2514 // becomes unhappy with its recycled debug info. 2515 2516 if (byte_size.getValueOr(0) == 0 && bit_offset < 0) { 2517 bit_size = 0; 2518 bit_offset = 0; 2519 } 2520 2521 const bool class_is_objc_object_or_interface = 2522 TypeSystemClang::IsObjCObjectOrInterfaceType(class_clang_type); 2523 2524 // FIXME: Make Clang ignore Objective-C accessibility for expressions 2525 if (class_is_objc_object_or_interface) 2526 accessibility = eAccessNone; 2527 2528 // Handle static members 2529 if (is_external && member_byte_offset == UINT32_MAX) { 2530 Type *var_type = die.ResolveTypeUID(encoding_form.Reference()); 2531 2532 if (var_type) { 2533 if (accessibility == eAccessNone) 2534 accessibility = eAccessPublic; 2535 TypeSystemClang::AddVariableToRecordType( 2536 class_clang_type, name, var_type->GetLayoutCompilerType(), 2537 accessibility); 2538 } 2539 return; 2540 } 2541 2542 if (!is_artificial) { 2543 Type *member_type = die.ResolveTypeUID(encoding_form.Reference()); 2544 2545 clang::FieldDecl *field_decl = nullptr; 2546 const uint64_t character_width = 8; 2547 const uint64_t word_width = 32; 2548 if (tag == DW_TAG_member) { 2549 if (member_type) { 2550 CompilerType member_clang_type = member_type->GetLayoutCompilerType(); 2551 2552 if (accessibility == eAccessNone) 2553 accessibility = default_accessibility; 2554 member_accessibilities.push_back(accessibility); 2555 2556 uint64_t field_bit_offset = 2557 (member_byte_offset == UINT32_MAX ? 0 : (member_byte_offset * 8)); 2558 2559 if (bit_size > 0) { 2560 FieldInfo this_field_info; 2561 this_field_info.bit_offset = field_bit_offset; 2562 this_field_info.bit_size = bit_size; 2563 2564 if (data_bit_offset != UINT64_MAX) { 2565 this_field_info.bit_offset = data_bit_offset; 2566 } else { 2567 if (!byte_size) 2568 byte_size = member_type->GetByteSize(nullptr); 2569 2570 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 2571 if (objfile->GetByteOrder() == eByteOrderLittle) { 2572 this_field_info.bit_offset += byte_size.getValueOr(0) * 8; 2573 this_field_info.bit_offset -= (bit_offset + bit_size); 2574 } else { 2575 this_field_info.bit_offset += bit_offset; 2576 } 2577 } 2578 2579 // The ObjC runtime knows the byte offset but we still need to provide 2580 // the bit-offset in the layout. It just means something different then 2581 // what it does in C and C++. So we skip this check for ObjC types. 2582 // 2583 // We also skip this for fields of a union since they will all have a 2584 // zero offset. 2585 if (!TypeSystemClang::IsObjCObjectOrInterfaceType(class_clang_type) && 2586 !(parent_die.Tag() == DW_TAG_union_type && this_field_info.bit_offset == 0) && 2587 ((this_field_info.bit_offset >= parent_bit_size) || 2588 (last_field_info.IsBitfield() && 2589 !last_field_info.NextBitfieldOffsetIsValid( 2590 this_field_info.bit_offset)))) { 2591 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 2592 objfile->GetModule()->ReportWarning( 2593 "0x%8.8" PRIx64 ": %s bitfield named \"%s\" has invalid " 2594 "bit offset (0x%8.8" PRIx64 2595 ") member will be ignored. Please file a bug against the " 2596 "compiler and include the preprocessed output for %s\n", 2597 die.GetID(), DW_TAG_value_to_name(tag), name, 2598 this_field_info.bit_offset, GetUnitName(parent_die).c_str()); 2599 return; 2600 } 2601 2602 // Update the field bit offset we will report for layout 2603 field_bit_offset = this_field_info.bit_offset; 2604 2605 // Objective-C has invalid DW_AT_bit_offset values in older 2606 // versions of clang, so we have to be careful and only insert 2607 // unnamed bitfields if we have a new enough clang. 2608 bool detect_unnamed_bitfields = true; 2609 2610 if (class_is_objc_object_or_interface) 2611 detect_unnamed_bitfields = 2612 die.GetCU()->Supports_unnamed_objc_bitfields(); 2613 2614 if (detect_unnamed_bitfields) { 2615 clang::Optional<FieldInfo> unnamed_field_info; 2616 uint64_t last_field_end = 0; 2617 2618 last_field_end = 2619 last_field_info.bit_offset + last_field_info.bit_size; 2620 2621 if (!last_field_info.IsBitfield()) { 2622 // The last field was not a bit-field... 2623 // but if it did take up the entire word then we need to extend 2624 // last_field_end so the bit-field does not step into the last 2625 // fields padding. 2626 if (last_field_end != 0 && ((last_field_end % word_width) != 0)) 2627 last_field_end += word_width - (last_field_end % word_width); 2628 } 2629 2630 // If we have a gap between the last_field_end and the current 2631 // field we have an unnamed bit-field. 2632 // If we have a base class, we assume there is no unnamed 2633 // bit-field if this is the first field since the gap can be 2634 // attributed to the members from the base class. This assumption 2635 // is not correct if the first field of the derived class is 2636 // indeed an unnamed bit-field. We currently do not have the 2637 // machinary to track the offset of the last field of classes we 2638 // have seen before, so we are not handling this case. 2639 if (this_field_info.bit_offset != last_field_end && 2640 this_field_info.bit_offset > last_field_end && 2641 !(last_field_info.bit_offset == 0 && 2642 last_field_info.bit_size == 0 && 2643 layout_info.base_offsets.size() != 0)) { 2644 unnamed_field_info = FieldInfo{}; 2645 unnamed_field_info->bit_size = 2646 this_field_info.bit_offset - last_field_end; 2647 unnamed_field_info->bit_offset = last_field_end; 2648 } 2649 2650 if (unnamed_field_info) { 2651 clang::FieldDecl *unnamed_bitfield_decl = 2652 TypeSystemClang::AddFieldToRecordType( 2653 class_clang_type, llvm::StringRef(), 2654 m_ast.GetBuiltinTypeForEncodingAndBitSize(eEncodingSint, 2655 word_width), 2656 accessibility, unnamed_field_info->bit_size); 2657 2658 layout_info.field_offsets.insert(std::make_pair( 2659 unnamed_bitfield_decl, unnamed_field_info->bit_offset)); 2660 } 2661 } 2662 2663 last_field_info = this_field_info; 2664 last_field_info.SetIsBitfield(true); 2665 } else { 2666 last_field_info.bit_offset = field_bit_offset; 2667 2668 if (llvm::Optional<uint64_t> clang_type_size = 2669 member_clang_type.GetByteSize(nullptr)) { 2670 last_field_info.bit_size = *clang_type_size * character_width; 2671 } 2672 2673 last_field_info.SetIsBitfield(false); 2674 } 2675 2676 if (!member_clang_type.IsCompleteType()) 2677 member_clang_type.GetCompleteType(); 2678 2679 { 2680 // Older versions of clang emit array[0] and array[1] in the 2681 // same way (<rdar://problem/12566646>). If the current field 2682 // is at the end of the structure, then there is definitely no 2683 // room for extra elements and we override the type to 2684 // array[0]. 2685 2686 CompilerType member_array_element_type; 2687 uint64_t member_array_size; 2688 bool member_array_is_incomplete; 2689 2690 if (member_clang_type.IsArrayType(&member_array_element_type, 2691 &member_array_size, 2692 &member_array_is_incomplete) && 2693 !member_array_is_incomplete) { 2694 uint64_t parent_byte_size = 2695 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 2696 UINT64_MAX); 2697 2698 if (member_byte_offset >= parent_byte_size) { 2699 if (member_array_size != 1 && 2700 (member_array_size != 0 || 2701 member_byte_offset > parent_byte_size)) { 2702 module_sp->ReportError( 2703 "0x%8.8" PRIx64 2704 ": DW_TAG_member '%s' refers to type 0x%8.8x" 2705 " which extends beyond the bounds of 0x%8.8" PRIx64, 2706 die.GetID(), name, encoding_form.Reference().GetOffset(), 2707 parent_die.GetID()); 2708 } 2709 2710 member_clang_type = 2711 m_ast.CreateArrayType(member_array_element_type, 0, false); 2712 } 2713 } 2714 } 2715 2716 RequireCompleteType(member_clang_type); 2717 2718 field_decl = TypeSystemClang::AddFieldToRecordType( 2719 class_clang_type, name, member_clang_type, accessibility, 2720 bit_size); 2721 2722 m_ast.SetMetadataAsUserID(field_decl, die.GetID()); 2723 2724 layout_info.field_offsets.insert( 2725 std::make_pair(field_decl, field_bit_offset)); 2726 } else { 2727 if (name) 2728 module_sp->ReportError( 2729 "0x%8.8" PRIx64 ": DW_TAG_member '%s' refers to type 0x%8.8x" 2730 " which was unable to be parsed", 2731 die.GetID(), name, encoding_form.Reference().GetOffset()); 2732 else 2733 module_sp->ReportError( 2734 "0x%8.8" PRIx64 ": DW_TAG_member refers to type 0x%8.8x" 2735 " which was unable to be parsed", 2736 die.GetID(), encoding_form.Reference().GetOffset()); 2737 } 2738 } 2739 2740 if (prop_name != nullptr && member_type) { 2741 clang::ObjCIvarDecl *ivar_decl = nullptr; 2742 2743 if (field_decl) { 2744 ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl); 2745 assert(ivar_decl != nullptr); 2746 } 2747 2748 ClangASTMetadata metadata; 2749 metadata.SetUserID(die.GetID()); 2750 delayed_properties.push_back(DelayedAddObjCClassProperty( 2751 class_clang_type, prop_name, member_type->GetLayoutCompilerType(), 2752 ivar_decl, prop_setter_name, prop_getter_name, prop_attributes, 2753 &metadata)); 2754 2755 if (ivar_decl) 2756 m_ast.SetMetadataAsUserID(ivar_decl, die.GetID()); 2757 } 2758 } 2759 } 2760 2761 bool DWARFASTParserClang::ParseChildMembers( 2762 const DWARFDIE &parent_die, CompilerType &class_clang_type, 2763 std::vector<std::unique_ptr<clang::CXXBaseSpecifier>> &base_classes, 2764 std::vector<int> &member_accessibilities, 2765 std::vector<DWARFDIE> &member_function_dies, 2766 DelayedPropertyList &delayed_properties, AccessType &default_accessibility, 2767 bool &is_a_class, ClangASTImporter::LayoutInfo &layout_info) { 2768 if (!parent_die) 2769 return false; 2770 2771 FieldInfo last_field_info; 2772 2773 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule(); 2774 TypeSystemClang *ast = 2775 llvm::dyn_cast_or_null<TypeSystemClang>(class_clang_type.GetTypeSystem()); 2776 if (ast == nullptr) 2777 return false; 2778 2779 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2780 die = die.GetSibling()) { 2781 dw_tag_t tag = die.Tag(); 2782 2783 switch (tag) { 2784 case DW_TAG_member: 2785 case DW_TAG_APPLE_property: 2786 ParseSingleMember(die, parent_die, class_clang_type, 2787 member_accessibilities, default_accessibility, 2788 delayed_properties, layout_info, last_field_info); 2789 break; 2790 2791 case DW_TAG_subprogram: 2792 // Let the type parsing code handle this one for us. 2793 member_function_dies.push_back(die); 2794 break; 2795 2796 case DW_TAG_inheritance: { 2797 is_a_class = true; 2798 if (default_accessibility == eAccessNone) 2799 default_accessibility = eAccessPrivate; 2800 // TODO: implement DW_TAG_inheritance type parsing 2801 DWARFAttributes attributes; 2802 const size_t num_attributes = die.GetAttributes(attributes); 2803 if (num_attributes > 0) { 2804 DWARFFormValue encoding_form; 2805 AccessType accessibility = default_accessibility; 2806 bool is_virtual = false; 2807 bool is_base_of_class = true; 2808 off_t member_byte_offset = 0; 2809 uint32_t i; 2810 for (i = 0; i < num_attributes; ++i) { 2811 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2812 DWARFFormValue form_value; 2813 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2814 switch (attr) { 2815 case DW_AT_type: 2816 encoding_form = form_value; 2817 break; 2818 case DW_AT_data_member_location: 2819 if (form_value.BlockData()) { 2820 Value initialValue(0); 2821 Value memberOffset(0); 2822 const DWARFDataExtractor &debug_info_data = die.GetData(); 2823 uint32_t block_length = form_value.Unsigned(); 2824 uint32_t block_offset = 2825 form_value.BlockData() - debug_info_data.GetDataStart(); 2826 if (DWARFExpression::Evaluate( 2827 nullptr, nullptr, module_sp, 2828 DataExtractor(debug_info_data, block_offset, 2829 block_length), 2830 die.GetCU(), eRegisterKindDWARF, &initialValue, nullptr, 2831 memberOffset, nullptr)) { 2832 member_byte_offset = 2833 memberOffset.ResolveValue(nullptr).UInt(); 2834 } 2835 } else { 2836 // With DWARF 3 and later, if the value is an integer constant, 2837 // this form value is the offset in bytes from the beginning of 2838 // the containing entity. 2839 member_byte_offset = form_value.Unsigned(); 2840 } 2841 break; 2842 2843 case DW_AT_accessibility: 2844 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 2845 break; 2846 2847 case DW_AT_virtuality: 2848 is_virtual = form_value.Boolean(); 2849 break; 2850 2851 case DW_AT_sibling: 2852 break; 2853 2854 default: 2855 break; 2856 } 2857 } 2858 } 2859 2860 Type *base_class_type = die.ResolveTypeUID(encoding_form.Reference()); 2861 if (base_class_type == nullptr) { 2862 module_sp->ReportError("0x%8.8x: DW_TAG_inheritance failed to " 2863 "resolve the base class at 0x%8.8x" 2864 " from enclosing type 0x%8.8x. \nPlease file " 2865 "a bug and attach the file at the start of " 2866 "this error message", 2867 die.GetOffset(), 2868 encoding_form.Reference().GetOffset(), 2869 parent_die.GetOffset()); 2870 break; 2871 } 2872 2873 CompilerType base_class_clang_type = 2874 base_class_type->GetFullCompilerType(); 2875 assert(base_class_clang_type); 2876 if (TypeSystemClang::IsObjCObjectOrInterfaceType(class_clang_type)) { 2877 ast->SetObjCSuperClass(class_clang_type, base_class_clang_type); 2878 } else { 2879 std::unique_ptr<clang::CXXBaseSpecifier> result = 2880 ast->CreateBaseClassSpecifier( 2881 base_class_clang_type.GetOpaqueQualType(), accessibility, 2882 is_virtual, is_base_of_class); 2883 if (!result) 2884 break; 2885 2886 base_classes.push_back(std::move(result)); 2887 2888 if (is_virtual) { 2889 // Do not specify any offset for virtual inheritance. The DWARF 2890 // produced by clang doesn't give us a constant offset, but gives 2891 // us a DWARF expressions that requires an actual object in memory. 2892 // the DW_AT_data_member_location for a virtual base class looks 2893 // like: 2894 // DW_AT_data_member_location( DW_OP_dup, DW_OP_deref, 2895 // DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref, 2896 // DW_OP_plus ) 2897 // Given this, there is really no valid response we can give to 2898 // clang for virtual base class offsets, and this should eventually 2899 // be removed from LayoutRecordType() in the external 2900 // AST source in clang. 2901 } else { 2902 layout_info.base_offsets.insert(std::make_pair( 2903 ast->GetAsCXXRecordDecl( 2904 base_class_clang_type.GetOpaqueQualType()), 2905 clang::CharUnits::fromQuantity(member_byte_offset))); 2906 } 2907 } 2908 } 2909 } break; 2910 2911 default: 2912 break; 2913 } 2914 } 2915 2916 return true; 2917 } 2918 2919 size_t DWARFASTParserClang::ParseChildParameters( 2920 clang::DeclContext *containing_decl_ctx, const DWARFDIE &parent_die, 2921 bool skip_artificial, bool &is_static, bool &is_variadic, 2922 bool &has_template_params, std::vector<CompilerType> &function_param_types, 2923 std::vector<clang::ParmVarDecl *> &function_param_decls, 2924 unsigned &type_quals) { 2925 if (!parent_die) 2926 return 0; 2927 2928 size_t arg_idx = 0; 2929 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2930 die = die.GetSibling()) { 2931 const dw_tag_t tag = die.Tag(); 2932 switch (tag) { 2933 case DW_TAG_formal_parameter: { 2934 DWARFAttributes attributes; 2935 const size_t num_attributes = die.GetAttributes(attributes); 2936 if (num_attributes > 0) { 2937 const char *name = nullptr; 2938 DWARFFormValue param_type_die_form; 2939 bool is_artificial = false; 2940 // one of None, Auto, Register, Extern, Static, PrivateExtern 2941 2942 clang::StorageClass storage = clang::SC_None; 2943 uint32_t i; 2944 for (i = 0; i < num_attributes; ++i) { 2945 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2946 DWARFFormValue form_value; 2947 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2948 switch (attr) { 2949 case DW_AT_name: 2950 name = form_value.AsCString(); 2951 break; 2952 case DW_AT_type: 2953 param_type_die_form = form_value; 2954 break; 2955 case DW_AT_artificial: 2956 is_artificial = form_value.Boolean(); 2957 break; 2958 case DW_AT_location: 2959 case DW_AT_const_value: 2960 case DW_AT_default_value: 2961 case DW_AT_description: 2962 case DW_AT_endianity: 2963 case DW_AT_is_optional: 2964 case DW_AT_segment: 2965 case DW_AT_variable_parameter: 2966 default: 2967 case DW_AT_abstract_origin: 2968 case DW_AT_sibling: 2969 break; 2970 } 2971 } 2972 } 2973 2974 bool skip = false; 2975 if (skip_artificial && is_artificial) { 2976 // In order to determine if a C++ member function is "const" we 2977 // have to look at the const-ness of "this"... 2978 if (arg_idx == 0 && 2979 DeclKindIsCXXClass(containing_decl_ctx->getDeclKind()) && 2980 // Often times compilers omit the "this" name for the 2981 // specification DIEs, so we can't rely upon the name being in 2982 // the formal parameter DIE... 2983 (name == nullptr || ::strcmp(name, "this") == 0)) { 2984 Type *this_type = 2985 die.ResolveTypeUID(param_type_die_form.Reference()); 2986 if (this_type) { 2987 uint32_t encoding_mask = this_type->GetEncodingMask(); 2988 if (encoding_mask & Type::eEncodingIsPointerUID) { 2989 is_static = false; 2990 2991 if (encoding_mask & (1u << Type::eEncodingIsConstUID)) 2992 type_quals |= clang::Qualifiers::Const; 2993 if (encoding_mask & (1u << Type::eEncodingIsVolatileUID)) 2994 type_quals |= clang::Qualifiers::Volatile; 2995 } 2996 } 2997 } 2998 skip = true; 2999 } 3000 3001 if (!skip) { 3002 Type *type = die.ResolveTypeUID(param_type_die_form.Reference()); 3003 if (type) { 3004 function_param_types.push_back(type->GetForwardCompilerType()); 3005 3006 clang::ParmVarDecl *param_var_decl = 3007 m_ast.CreateParameterDeclaration( 3008 containing_decl_ctx, GetOwningClangModule(die), name, 3009 type->GetForwardCompilerType(), storage); 3010 assert(param_var_decl); 3011 function_param_decls.push_back(param_var_decl); 3012 3013 m_ast.SetMetadataAsUserID(param_var_decl, die.GetID()); 3014 } 3015 } 3016 } 3017 arg_idx++; 3018 } break; 3019 3020 case DW_TAG_unspecified_parameters: 3021 is_variadic = true; 3022 break; 3023 3024 case DW_TAG_template_type_parameter: 3025 case DW_TAG_template_value_parameter: 3026 case DW_TAG_GNU_template_parameter_pack: 3027 // The one caller of this was never using the template_param_infos, and 3028 // the local variable was taking up a large amount of stack space in 3029 // SymbolFileDWARF::ParseType() so this was removed. If we ever need the 3030 // template params back, we can add them back. 3031 // ParseTemplateDIE (dwarf_cu, die, template_param_infos); 3032 has_template_params = true; 3033 break; 3034 3035 default: 3036 break; 3037 } 3038 } 3039 return arg_idx; 3040 } 3041 3042 llvm::Optional<SymbolFile::ArrayInfo> 3043 DWARFASTParser::ParseChildArrayInfo(const DWARFDIE &parent_die, 3044 const ExecutionContext *exe_ctx) { 3045 SymbolFile::ArrayInfo array_info; 3046 if (!parent_die) 3047 return llvm::None; 3048 3049 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 3050 die = die.GetSibling()) { 3051 const dw_tag_t tag = die.Tag(); 3052 if (tag != DW_TAG_subrange_type) 3053 continue; 3054 3055 DWARFAttributes attributes; 3056 const size_t num_child_attributes = die.GetAttributes(attributes); 3057 if (num_child_attributes > 0) { 3058 uint64_t num_elements = 0; 3059 uint64_t lower_bound = 0; 3060 uint64_t upper_bound = 0; 3061 bool upper_bound_valid = false; 3062 uint32_t i; 3063 for (i = 0; i < num_child_attributes; ++i) { 3064 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3065 DWARFFormValue form_value; 3066 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3067 switch (attr) { 3068 case DW_AT_name: 3069 break; 3070 3071 case DW_AT_count: 3072 if (DWARFDIE var_die = die.GetReferencedDIE(DW_AT_count)) { 3073 if (var_die.Tag() == DW_TAG_variable) 3074 if (exe_ctx) { 3075 if (auto frame = exe_ctx->GetFrameSP()) { 3076 Status error; 3077 lldb::VariableSP var_sp; 3078 auto valobj_sp = frame->GetValueForVariableExpressionPath( 3079 var_die.GetName(), eNoDynamicValues, 0, var_sp, 3080 error); 3081 if (valobj_sp) { 3082 num_elements = valobj_sp->GetValueAsUnsigned(0); 3083 break; 3084 } 3085 } 3086 } 3087 } else 3088 num_elements = form_value.Unsigned(); 3089 break; 3090 3091 case DW_AT_bit_stride: 3092 array_info.bit_stride = form_value.Unsigned(); 3093 break; 3094 3095 case DW_AT_byte_stride: 3096 array_info.byte_stride = form_value.Unsigned(); 3097 break; 3098 3099 case DW_AT_lower_bound: 3100 lower_bound = form_value.Unsigned(); 3101 break; 3102 3103 case DW_AT_upper_bound: 3104 upper_bound_valid = true; 3105 upper_bound = form_value.Unsigned(); 3106 break; 3107 3108 default: 3109 case DW_AT_abstract_origin: 3110 case DW_AT_accessibility: 3111 case DW_AT_allocated: 3112 case DW_AT_associated: 3113 case DW_AT_data_location: 3114 case DW_AT_declaration: 3115 case DW_AT_description: 3116 case DW_AT_sibling: 3117 case DW_AT_threads_scaled: 3118 case DW_AT_type: 3119 case DW_AT_visibility: 3120 break; 3121 } 3122 } 3123 } 3124 3125 if (num_elements == 0) { 3126 if (upper_bound_valid && upper_bound >= lower_bound) 3127 num_elements = upper_bound - lower_bound + 1; 3128 } 3129 3130 array_info.element_orders.push_back(num_elements); 3131 } 3132 } 3133 return array_info; 3134 } 3135 3136 Type *DWARFASTParserClang::GetTypeForDIE(const DWARFDIE &die) { 3137 if (die) { 3138 SymbolFileDWARF *dwarf = die.GetDWARF(); 3139 DWARFAttributes attributes; 3140 const size_t num_attributes = die.GetAttributes(attributes); 3141 if (num_attributes > 0) { 3142 DWARFFormValue type_die_form; 3143 for (size_t i = 0; i < num_attributes; ++i) { 3144 dw_attr_t attr = attributes.AttributeAtIndex(i); 3145 DWARFFormValue form_value; 3146 3147 if (attr == DW_AT_type && 3148 attributes.ExtractFormValueAtIndex(i, form_value)) 3149 return dwarf->ResolveTypeUID(form_value.Reference(), true); 3150 } 3151 } 3152 } 3153 3154 return nullptr; 3155 } 3156 3157 clang::Decl *DWARFASTParserClang::GetClangDeclForDIE(const DWARFDIE &die) { 3158 if (!die) 3159 return nullptr; 3160 3161 switch (die.Tag()) { 3162 case DW_TAG_variable: 3163 case DW_TAG_constant: 3164 case DW_TAG_formal_parameter: 3165 case DW_TAG_imported_declaration: 3166 case DW_TAG_imported_module: 3167 break; 3168 default: 3169 return nullptr; 3170 } 3171 3172 DIEToDeclMap::iterator cache_pos = m_die_to_decl.find(die.GetDIE()); 3173 if (cache_pos != m_die_to_decl.end()) 3174 return cache_pos->second; 3175 3176 if (DWARFDIE spec_die = die.GetReferencedDIE(DW_AT_specification)) { 3177 clang::Decl *decl = GetClangDeclForDIE(spec_die); 3178 m_die_to_decl[die.GetDIE()] = decl; 3179 m_decl_to_die[decl].insert(die.GetDIE()); 3180 return decl; 3181 } 3182 3183 if (DWARFDIE abstract_origin_die = 3184 die.GetReferencedDIE(DW_AT_abstract_origin)) { 3185 clang::Decl *decl = GetClangDeclForDIE(abstract_origin_die); 3186 m_die_to_decl[die.GetDIE()] = decl; 3187 m_decl_to_die[decl].insert(die.GetDIE()); 3188 return decl; 3189 } 3190 3191 clang::Decl *decl = nullptr; 3192 switch (die.Tag()) { 3193 case DW_TAG_variable: 3194 case DW_TAG_constant: 3195 case DW_TAG_formal_parameter: { 3196 SymbolFileDWARF *dwarf = die.GetDWARF(); 3197 Type *type = GetTypeForDIE(die); 3198 if (dwarf && type) { 3199 const char *name = die.GetName(); 3200 clang::DeclContext *decl_context = 3201 TypeSystemClang::DeclContextGetAsDeclContext( 3202 dwarf->GetDeclContextContainingUID(die.GetID())); 3203 decl = m_ast.CreateVariableDeclaration( 3204 decl_context, GetOwningClangModule(die), name, 3205 ClangUtil::GetQualType(type->GetForwardCompilerType())); 3206 } 3207 break; 3208 } 3209 case DW_TAG_imported_declaration: { 3210 SymbolFileDWARF *dwarf = die.GetDWARF(); 3211 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3212 if (imported_uid) { 3213 CompilerDecl imported_decl = SymbolFileDWARF::GetDecl(imported_uid); 3214 if (imported_decl) { 3215 clang::DeclContext *decl_context = 3216 TypeSystemClang::DeclContextGetAsDeclContext( 3217 dwarf->GetDeclContextContainingUID(die.GetID())); 3218 if (clang::NamedDecl *clang_imported_decl = 3219 llvm::dyn_cast<clang::NamedDecl>( 3220 (clang::Decl *)imported_decl.GetOpaqueDecl())) 3221 decl = m_ast.CreateUsingDeclaration( 3222 decl_context, OptionalClangModuleID(), clang_imported_decl); 3223 } 3224 } 3225 break; 3226 } 3227 case DW_TAG_imported_module: { 3228 SymbolFileDWARF *dwarf = die.GetDWARF(); 3229 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3230 3231 if (imported_uid) { 3232 CompilerDeclContext imported_decl_ctx = 3233 SymbolFileDWARF::GetDeclContext(imported_uid); 3234 if (imported_decl_ctx) { 3235 clang::DeclContext *decl_context = 3236 TypeSystemClang::DeclContextGetAsDeclContext( 3237 dwarf->GetDeclContextContainingUID(die.GetID())); 3238 if (clang::NamespaceDecl *ns_decl = 3239 TypeSystemClang::DeclContextGetAsNamespaceDecl( 3240 imported_decl_ctx)) 3241 decl = m_ast.CreateUsingDirectiveDeclaration( 3242 decl_context, OptionalClangModuleID(), ns_decl); 3243 } 3244 } 3245 break; 3246 } 3247 default: 3248 break; 3249 } 3250 3251 m_die_to_decl[die.GetDIE()] = decl; 3252 m_decl_to_die[decl].insert(die.GetDIE()); 3253 3254 return decl; 3255 } 3256 3257 clang::DeclContext * 3258 DWARFASTParserClang::GetClangDeclContextForDIE(const DWARFDIE &die) { 3259 if (die) { 3260 clang::DeclContext *decl_ctx = GetCachedClangDeclContextForDIE(die); 3261 if (decl_ctx) 3262 return decl_ctx; 3263 3264 bool try_parsing_type = true; 3265 switch (die.Tag()) { 3266 case DW_TAG_compile_unit: 3267 case DW_TAG_partial_unit: 3268 decl_ctx = m_ast.GetTranslationUnitDecl(); 3269 try_parsing_type = false; 3270 break; 3271 3272 case DW_TAG_namespace: 3273 decl_ctx = ResolveNamespaceDIE(die); 3274 try_parsing_type = false; 3275 break; 3276 3277 case DW_TAG_lexical_block: 3278 decl_ctx = GetDeclContextForBlock(die); 3279 try_parsing_type = false; 3280 break; 3281 3282 default: 3283 break; 3284 } 3285 3286 if (decl_ctx == nullptr && try_parsing_type) { 3287 Type *type = die.GetDWARF()->ResolveType(die); 3288 if (type) 3289 decl_ctx = GetCachedClangDeclContextForDIE(die); 3290 } 3291 3292 if (decl_ctx) { 3293 LinkDeclContextToDIE(decl_ctx, die); 3294 return decl_ctx; 3295 } 3296 } 3297 return nullptr; 3298 } 3299 3300 OptionalClangModuleID 3301 DWARFASTParserClang::GetOwningClangModule(const DWARFDIE &die) { 3302 if (!die.IsValid()) 3303 return {}; 3304 3305 for (DWARFDIE parent = die.GetParent(); parent.IsValid(); 3306 parent = parent.GetParent()) { 3307 const dw_tag_t tag = parent.Tag(); 3308 if (tag == DW_TAG_module) { 3309 DWARFDIE module_die = parent; 3310 auto it = m_die_to_module.find(module_die.GetDIE()); 3311 if (it != m_die_to_module.end()) 3312 return it->second; 3313 const char *name = module_die.GetAttributeValueAsString(DW_AT_name, 0); 3314 if (!name) 3315 return {}; 3316 3317 OptionalClangModuleID id = 3318 m_ast.GetOrCreateClangModule(name, GetOwningClangModule(module_die)); 3319 m_die_to_module.insert({module_die.GetDIE(), id}); 3320 return id; 3321 } 3322 } 3323 return {}; 3324 } 3325 3326 static bool IsSubroutine(const DWARFDIE &die) { 3327 switch (die.Tag()) { 3328 case DW_TAG_subprogram: 3329 case DW_TAG_inlined_subroutine: 3330 return true; 3331 default: 3332 return false; 3333 } 3334 } 3335 3336 static DWARFDIE GetContainingFunctionWithAbstractOrigin(const DWARFDIE &die) { 3337 for (DWARFDIE candidate = die; candidate; candidate = candidate.GetParent()) { 3338 if (IsSubroutine(candidate)) { 3339 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3340 return candidate; 3341 } else { 3342 return DWARFDIE(); 3343 } 3344 } 3345 } 3346 assert(0 && "Shouldn't call GetContainingFunctionWithAbstractOrigin on " 3347 "something not in a function"); 3348 return DWARFDIE(); 3349 } 3350 3351 static DWARFDIE FindAnyChildWithAbstractOrigin(const DWARFDIE &context) { 3352 for (DWARFDIE candidate = context.GetFirstChild(); candidate.IsValid(); 3353 candidate = candidate.GetSibling()) { 3354 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3355 return candidate; 3356 } 3357 } 3358 return DWARFDIE(); 3359 } 3360 3361 static DWARFDIE FindFirstChildWithAbstractOrigin(const DWARFDIE &block, 3362 const DWARFDIE &function) { 3363 assert(IsSubroutine(function)); 3364 for (DWARFDIE context = block; context != function.GetParent(); 3365 context = context.GetParent()) { 3366 assert(!IsSubroutine(context) || context == function); 3367 if (DWARFDIE child = FindAnyChildWithAbstractOrigin(context)) { 3368 return child; 3369 } 3370 } 3371 return DWARFDIE(); 3372 } 3373 3374 clang::DeclContext * 3375 DWARFASTParserClang::GetDeclContextForBlock(const DWARFDIE &die) { 3376 assert(die.Tag() == DW_TAG_lexical_block); 3377 DWARFDIE containing_function_with_abstract_origin = 3378 GetContainingFunctionWithAbstractOrigin(die); 3379 if (!containing_function_with_abstract_origin) { 3380 return (clang::DeclContext *)ResolveBlockDIE(die); 3381 } 3382 DWARFDIE child = FindFirstChildWithAbstractOrigin( 3383 die, containing_function_with_abstract_origin); 3384 CompilerDeclContext decl_context = 3385 GetDeclContextContainingUIDFromDWARF(child); 3386 return (clang::DeclContext *)decl_context.GetOpaqueDeclContext(); 3387 } 3388 3389 clang::BlockDecl *DWARFASTParserClang::ResolveBlockDIE(const DWARFDIE &die) { 3390 if (die && die.Tag() == DW_TAG_lexical_block) { 3391 clang::BlockDecl *decl = 3392 llvm::cast_or_null<clang::BlockDecl>(m_die_to_decl_ctx[die.GetDIE()]); 3393 3394 if (!decl) { 3395 DWARFDIE decl_context_die; 3396 clang::DeclContext *decl_context = 3397 GetClangDeclContextContainingDIE(die, &decl_context_die); 3398 decl = 3399 m_ast.CreateBlockDeclaration(decl_context, GetOwningClangModule(die)); 3400 3401 if (decl) 3402 LinkDeclContextToDIE((clang::DeclContext *)decl, die); 3403 } 3404 3405 return decl; 3406 } 3407 return nullptr; 3408 } 3409 3410 clang::NamespaceDecl * 3411 DWARFASTParserClang::ResolveNamespaceDIE(const DWARFDIE &die) { 3412 if (die && die.Tag() == DW_TAG_namespace) { 3413 // See if we already parsed this namespace DIE and associated it with a 3414 // uniqued namespace declaration 3415 clang::NamespaceDecl *namespace_decl = 3416 static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die.GetDIE()]); 3417 if (namespace_decl) 3418 return namespace_decl; 3419 else { 3420 const char *namespace_name = die.GetName(); 3421 clang::DeclContext *containing_decl_ctx = 3422 GetClangDeclContextContainingDIE(die, nullptr); 3423 bool is_inline = 3424 die.GetAttributeValueAsUnsigned(DW_AT_export_symbols, 0) != 0; 3425 3426 namespace_decl = m_ast.GetUniqueNamespaceDeclaration( 3427 namespace_name, containing_decl_ctx, GetOwningClangModule(die), 3428 is_inline); 3429 Log *log = 3430 nullptr; // (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 3431 if (log) { 3432 SymbolFileDWARF *dwarf = die.GetDWARF(); 3433 if (namespace_name) { 3434 dwarf->GetObjectFile()->GetModule()->LogMessage( 3435 log, 3436 "ASTContext => %p: 0x%8.8" PRIx64 3437 ": DW_TAG_namespace with DW_AT_name(\"%s\") => " 3438 "clang::NamespaceDecl *%p (original = %p)", 3439 static_cast<void *>(&m_ast.getASTContext()), die.GetID(), 3440 namespace_name, static_cast<void *>(namespace_decl), 3441 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3442 } else { 3443 dwarf->GetObjectFile()->GetModule()->LogMessage( 3444 log, 3445 "ASTContext => %p: 0x%8.8" PRIx64 3446 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p " 3447 "(original = %p)", 3448 static_cast<void *>(&m_ast.getASTContext()), die.GetID(), 3449 static_cast<void *>(namespace_decl), 3450 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3451 } 3452 } 3453 3454 if (namespace_decl) 3455 LinkDeclContextToDIE((clang::DeclContext *)namespace_decl, die); 3456 return namespace_decl; 3457 } 3458 } 3459 return nullptr; 3460 } 3461 3462 clang::DeclContext *DWARFASTParserClang::GetClangDeclContextContainingDIE( 3463 const DWARFDIE &die, DWARFDIE *decl_ctx_die_copy) { 3464 SymbolFileDWARF *dwarf = die.GetDWARF(); 3465 3466 DWARFDIE decl_ctx_die = dwarf->GetDeclContextDIEContainingDIE(die); 3467 3468 if (decl_ctx_die_copy) 3469 *decl_ctx_die_copy = decl_ctx_die; 3470 3471 if (decl_ctx_die) { 3472 clang::DeclContext *clang_decl_ctx = 3473 GetClangDeclContextForDIE(decl_ctx_die); 3474 if (clang_decl_ctx) 3475 return clang_decl_ctx; 3476 } 3477 return m_ast.GetTranslationUnitDecl(); 3478 } 3479 3480 clang::DeclContext * 3481 DWARFASTParserClang::GetCachedClangDeclContextForDIE(const DWARFDIE &die) { 3482 if (die) { 3483 DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find(die.GetDIE()); 3484 if (pos != m_die_to_decl_ctx.end()) 3485 return pos->second; 3486 } 3487 return nullptr; 3488 } 3489 3490 void DWARFASTParserClang::LinkDeclContextToDIE(clang::DeclContext *decl_ctx, 3491 const DWARFDIE &die) { 3492 m_die_to_decl_ctx[die.GetDIE()] = decl_ctx; 3493 // There can be many DIEs for a single decl context 3494 // m_decl_ctx_to_die[decl_ctx].insert(die.GetDIE()); 3495 m_decl_ctx_to_die.insert(std::make_pair(decl_ctx, die)); 3496 } 3497 3498 bool DWARFASTParserClang::CopyUniqueClassMethodTypes( 3499 const DWARFDIE &src_class_die, const DWARFDIE &dst_class_die, 3500 lldb_private::Type *class_type, std::vector<DWARFDIE> &failures) { 3501 if (!class_type || !src_class_die || !dst_class_die) 3502 return false; 3503 if (src_class_die.Tag() != dst_class_die.Tag()) 3504 return false; 3505 3506 // We need to complete the class type so we can get all of the method types 3507 // parsed so we can then unique those types to their equivalent counterparts 3508 // in "dst_cu" and "dst_class_die" 3509 class_type->GetFullCompilerType(); 3510 3511 DWARFDIE src_die; 3512 DWARFDIE dst_die; 3513 UniqueCStringMap<DWARFDIE> src_name_to_die; 3514 UniqueCStringMap<DWARFDIE> dst_name_to_die; 3515 UniqueCStringMap<DWARFDIE> src_name_to_die_artificial; 3516 UniqueCStringMap<DWARFDIE> dst_name_to_die_artificial; 3517 for (src_die = src_class_die.GetFirstChild(); src_die.IsValid(); 3518 src_die = src_die.GetSibling()) { 3519 if (src_die.Tag() == DW_TAG_subprogram) { 3520 // Make sure this is a declaration and not a concrete instance by looking 3521 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3522 // are placed inside the class definitions and shouldn't be included in 3523 // the list of things are are tracking here. 3524 if (src_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 3525 const char *src_name = src_die.GetMangledName(); 3526 if (src_name) { 3527 ConstString src_const_name(src_name); 3528 if (src_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3529 src_name_to_die_artificial.Append(src_const_name, src_die); 3530 else 3531 src_name_to_die.Append(src_const_name, src_die); 3532 } 3533 } 3534 } 3535 } 3536 for (dst_die = dst_class_die.GetFirstChild(); dst_die.IsValid(); 3537 dst_die = dst_die.GetSibling()) { 3538 if (dst_die.Tag() == DW_TAG_subprogram) { 3539 // Make sure this is a declaration and not a concrete instance by looking 3540 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3541 // are placed inside the class definitions and shouldn't be included in 3542 // the list of things are are tracking here. 3543 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 3544 const char *dst_name = dst_die.GetMangledName(); 3545 if (dst_name) { 3546 ConstString dst_const_name(dst_name); 3547 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3548 dst_name_to_die_artificial.Append(dst_const_name, dst_die); 3549 else 3550 dst_name_to_die.Append(dst_const_name, dst_die); 3551 } 3552 } 3553 } 3554 } 3555 const uint32_t src_size = src_name_to_die.GetSize(); 3556 const uint32_t dst_size = dst_name_to_die.GetSize(); 3557 Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | 3558 // DWARF_LOG_TYPE_COMPLETION)); 3559 3560 // Is everything kosher so we can go through the members at top speed? 3561 bool fast_path = true; 3562 3563 if (src_size != dst_size) { 3564 if (src_size != 0 && dst_size != 0) { 3565 LLDB_LOGF(log, 3566 "warning: trying to unique class DIE 0x%8.8x to 0x%8.8x, " 3567 "but they didn't have the same size (src=%d, dst=%d)", 3568 src_class_die.GetOffset(), dst_class_die.GetOffset(), src_size, 3569 dst_size); 3570 } 3571 3572 fast_path = false; 3573 } 3574 3575 uint32_t idx; 3576 3577 if (fast_path) { 3578 for (idx = 0; idx < src_size; ++idx) { 3579 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 3580 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3581 3582 if (src_die.Tag() != dst_die.Tag()) { 3583 LLDB_LOGF(log, 3584 "warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 3585 "but 0x%8.8x (%s) tags didn't match 0x%8.8x (%s)", 3586 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3587 src_die.GetOffset(), src_die.GetTagAsCString(), 3588 dst_die.GetOffset(), dst_die.GetTagAsCString()); 3589 fast_path = false; 3590 } 3591 3592 const char *src_name = src_die.GetMangledName(); 3593 const char *dst_name = dst_die.GetMangledName(); 3594 3595 // Make sure the names match 3596 if (src_name == dst_name || (strcmp(src_name, dst_name) == 0)) 3597 continue; 3598 3599 LLDB_LOGF(log, 3600 "warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 3601 "but 0x%8.8x (%s) names didn't match 0x%8.8x (%s)", 3602 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3603 src_die.GetOffset(), src_name, dst_die.GetOffset(), dst_name); 3604 3605 fast_path = false; 3606 } 3607 } 3608 3609 DWARFASTParserClang *src_dwarf_ast_parser = 3610 static_cast<DWARFASTParserClang *>( 3611 SymbolFileDWARF::GetDWARFParser(*src_die.GetCU())); 3612 DWARFASTParserClang *dst_dwarf_ast_parser = 3613 static_cast<DWARFASTParserClang *>( 3614 SymbolFileDWARF::GetDWARFParser(*dst_die.GetCU())); 3615 3616 // Now do the work of linking the DeclContexts and Types. 3617 if (fast_path) { 3618 // We can do this quickly. Just run across the tables index-for-index 3619 // since we know each node has matching names and tags. 3620 for (idx = 0; idx < src_size; ++idx) { 3621 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 3622 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3623 3624 clang::DeclContext *src_decl_ctx = 3625 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3626 if (src_decl_ctx) { 3627 LLDB_LOGF(log, "uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3628 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 3629 dst_die.GetOffset()); 3630 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 3631 } else { 3632 LLDB_LOGF(log, 3633 "warning: tried to unique decl context from 0x%8.8x for " 3634 "0x%8.8x, but none was found", 3635 src_die.GetOffset(), dst_die.GetOffset()); 3636 } 3637 3638 Type *src_child_type = 3639 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3640 if (src_child_type) { 3641 LLDB_LOGF(log, 3642 "uniquing type %p (uid=0x%" PRIx64 3643 ") from 0x%8.8x for 0x%8.8x", 3644 static_cast<void *>(src_child_type), src_child_type->GetID(), 3645 src_die.GetOffset(), dst_die.GetOffset()); 3646 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 3647 } else { 3648 LLDB_LOGF(log, 3649 "warning: tried to unique lldb_private::Type from " 3650 "0x%8.8x for 0x%8.8x, but none was found", 3651 src_die.GetOffset(), dst_die.GetOffset()); 3652 } 3653 } 3654 } else { 3655 // We must do this slowly. For each member of the destination, look up a 3656 // member in the source with the same name, check its tag, and unique them 3657 // if everything matches up. Report failures. 3658 3659 if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty()) { 3660 src_name_to_die.Sort(); 3661 3662 for (idx = 0; idx < dst_size; ++idx) { 3663 ConstString dst_name = dst_name_to_die.GetCStringAtIndex(idx); 3664 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3665 src_die = src_name_to_die.Find(dst_name, DWARFDIE()); 3666 3667 if (src_die && (src_die.Tag() == dst_die.Tag())) { 3668 clang::DeclContext *src_decl_ctx = 3669 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3670 if (src_decl_ctx) { 3671 LLDB_LOGF(log, "uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3672 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 3673 dst_die.GetOffset()); 3674 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 3675 } else { 3676 LLDB_LOGF(log, 3677 "warning: tried to unique decl context from 0x%8.8x " 3678 "for 0x%8.8x, but none was found", 3679 src_die.GetOffset(), dst_die.GetOffset()); 3680 } 3681 3682 Type *src_child_type = 3683 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3684 if (src_child_type) { 3685 LLDB_LOGF( 3686 log, 3687 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 3688 static_cast<void *>(src_child_type), src_child_type->GetID(), 3689 src_die.GetOffset(), dst_die.GetOffset()); 3690 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = 3691 src_child_type; 3692 } else { 3693 LLDB_LOGF(log, 3694 "warning: tried to unique lldb_private::Type from " 3695 "0x%8.8x for 0x%8.8x, but none was found", 3696 src_die.GetOffset(), dst_die.GetOffset()); 3697 } 3698 } else { 3699 LLDB_LOGF(log, "warning: couldn't find a match for 0x%8.8x", 3700 dst_die.GetOffset()); 3701 3702 failures.push_back(dst_die); 3703 } 3704 } 3705 } 3706 } 3707 3708 const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize(); 3709 const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize(); 3710 3711 if (src_size_artificial && dst_size_artificial) { 3712 dst_name_to_die_artificial.Sort(); 3713 3714 for (idx = 0; idx < src_size_artificial; ++idx) { 3715 ConstString src_name_artificial = 3716 src_name_to_die_artificial.GetCStringAtIndex(idx); 3717 src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 3718 dst_die = 3719 dst_name_to_die_artificial.Find(src_name_artificial, DWARFDIE()); 3720 3721 if (dst_die) { 3722 // Both classes have the artificial types, link them 3723 clang::DeclContext *src_decl_ctx = 3724 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3725 if (src_decl_ctx) { 3726 LLDB_LOGF(log, "uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3727 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 3728 dst_die.GetOffset()); 3729 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 3730 } else { 3731 LLDB_LOGF(log, 3732 "warning: tried to unique decl context from 0x%8.8x " 3733 "for 0x%8.8x, but none was found", 3734 src_die.GetOffset(), dst_die.GetOffset()); 3735 } 3736 3737 Type *src_child_type = 3738 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3739 if (src_child_type) { 3740 LLDB_LOGF( 3741 log, 3742 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 3743 static_cast<void *>(src_child_type), src_child_type->GetID(), 3744 src_die.GetOffset(), dst_die.GetOffset()); 3745 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 3746 } else { 3747 LLDB_LOGF(log, 3748 "warning: tried to unique lldb_private::Type from " 3749 "0x%8.8x for 0x%8.8x, but none was found", 3750 src_die.GetOffset(), dst_die.GetOffset()); 3751 } 3752 } 3753 } 3754 } 3755 3756 if (dst_size_artificial) { 3757 for (idx = 0; idx < dst_size_artificial; ++idx) { 3758 ConstString dst_name_artificial = 3759 dst_name_to_die_artificial.GetCStringAtIndex(idx); 3760 dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 3761 LLDB_LOGF(log, 3762 "warning: need to create artificial method for 0x%8.8x for " 3763 "method '%s'", 3764 dst_die.GetOffset(), dst_name_artificial.GetCString()); 3765 3766 failures.push_back(dst_die); 3767 } 3768 } 3769 3770 return !failures.empty(); 3771 } 3772