1 //===-- DWARFASTParserClang.cpp ---------------------------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include <stdlib.h> 10 11 #include "DWARFASTParserClang.h" 12 #include "DWARFDebugInfo.h" 13 #include "DWARFDeclContext.h" 14 #include "DWARFDefines.h" 15 #include "SymbolFileDWARF.h" 16 #include "SymbolFileDWARFDwo.h" 17 #include "SymbolFileDWARFDebugMap.h" 18 #include "UniqueDWARFASTType.h" 19 20 #include "Plugins/Language/ObjC/ObjCLanguage.h" 21 #include "lldb/Core/Module.h" 22 #include "lldb/Core/Value.h" 23 #include "lldb/Host/Host.h" 24 #include "lldb/Symbol/ClangASTImporter.h" 25 #include "lldb/Symbol/ClangASTMetadata.h" 26 #include "lldb/Symbol/ClangUtil.h" 27 #include "lldb/Symbol/CompileUnit.h" 28 #include "lldb/Symbol/Function.h" 29 #include "lldb/Symbol/ObjectFile.h" 30 #include "lldb/Symbol/SymbolFile.h" 31 #include "lldb/Symbol/TypeList.h" 32 #include "lldb/Symbol/TypeMap.h" 33 #include "lldb/Target/Language.h" 34 #include "lldb/Utility/LLDBAssert.h" 35 #include "lldb/Utility/Log.h" 36 #include "lldb/Utility/StreamString.h" 37 38 #include "clang/AST/CXXInheritance.h" 39 #include "clang/AST/DeclCXX.h" 40 #include "clang/AST/DeclObjC.h" 41 #include "clang/AST/DeclTemplate.h" 42 43 #include <map> 44 #include <memory> 45 #include <vector> 46 47 //#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN 48 49 #ifdef ENABLE_DEBUG_PRINTF 50 #include <stdio.h> 51 #define DEBUG_PRINTF(fmt, ...) printf(fmt, __VA_ARGS__) 52 #else 53 #define DEBUG_PRINTF(fmt, ...) 54 #endif 55 56 using namespace lldb; 57 using namespace lldb_private; 58 DWARFASTParserClang::DWARFASTParserClang(ClangASTContext &ast) 59 : m_ast(ast), m_die_to_decl_ctx(), m_decl_ctx_to_die() {} 60 61 DWARFASTParserClang::~DWARFASTParserClang() {} 62 63 static AccessType DW_ACCESS_to_AccessType(uint32_t dwarf_accessibility) { 64 switch (dwarf_accessibility) { 65 case DW_ACCESS_public: 66 return eAccessPublic; 67 case DW_ACCESS_private: 68 return eAccessPrivate; 69 case DW_ACCESS_protected: 70 return eAccessProtected; 71 default: 72 break; 73 } 74 return eAccessNone; 75 } 76 77 static bool DeclKindIsCXXClass(clang::Decl::Kind decl_kind) { 78 switch (decl_kind) { 79 case clang::Decl::CXXRecord: 80 case clang::Decl::ClassTemplateSpecialization: 81 return true; 82 default: 83 break; 84 } 85 return false; 86 } 87 88 struct BitfieldInfo { 89 uint64_t bit_size; 90 uint64_t bit_offset; 91 92 BitfieldInfo() 93 : bit_size(LLDB_INVALID_ADDRESS), bit_offset(LLDB_INVALID_ADDRESS) {} 94 95 void Clear() { 96 bit_size = LLDB_INVALID_ADDRESS; 97 bit_offset = LLDB_INVALID_ADDRESS; 98 } 99 100 bool IsValid() const { 101 return (bit_size != LLDB_INVALID_ADDRESS) && 102 (bit_offset != LLDB_INVALID_ADDRESS); 103 } 104 105 bool NextBitfieldOffsetIsValid(const uint64_t next_bit_offset) const { 106 if (IsValid()) { 107 // This bitfield info is valid, so any subsequent bitfields must not 108 // overlap and must be at a higher bit offset than any previous bitfield 109 // + size. 110 return (bit_size + bit_offset) <= next_bit_offset; 111 } else { 112 // If the this BitfieldInfo is not valid, then any offset isOK 113 return true; 114 } 115 } 116 }; 117 118 ClangASTImporter &DWARFASTParserClang::GetClangASTImporter() { 119 if (!m_clang_ast_importer_up) { 120 m_clang_ast_importer_up.reset(new ClangASTImporter); 121 } 122 return *m_clang_ast_importer_up; 123 } 124 125 /// Detect a forward declaration that is nested in a DW_TAG_module. 126 static bool IsClangModuleFwdDecl(const DWARFDIE &Die) { 127 if (!Die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0)) 128 return false; 129 auto Parent = Die.GetParent(); 130 while (Parent.IsValid()) { 131 if (Parent.Tag() == DW_TAG_module) 132 return true; 133 Parent = Parent.GetParent(); 134 } 135 return false; 136 } 137 138 static DWARFDIE GetContainingClangModuleDIE(const DWARFDIE &die) { 139 if (die.IsValid()) { 140 DWARFDIE top_module_die; 141 // Now make sure this DIE is scoped in a DW_TAG_module tag and return true 142 // if so 143 for (DWARFDIE parent = die.GetParent(); parent.IsValid(); 144 parent = parent.GetParent()) { 145 const dw_tag_t tag = parent.Tag(); 146 if (tag == DW_TAG_module) 147 top_module_die = parent; 148 else if (tag == DW_TAG_compile_unit || tag == DW_TAG_partial_unit) 149 break; 150 } 151 152 return top_module_die; 153 } 154 return DWARFDIE(); 155 } 156 157 static lldb::ModuleSP GetContainingClangModule(const DWARFDIE &die) { 158 if (die.IsValid()) { 159 DWARFDIE clang_module_die = GetContainingClangModuleDIE(die); 160 161 if (clang_module_die) { 162 const char *module_name = clang_module_die.GetName(); 163 if (module_name) 164 return die.GetDWARF()->GetExternalModule( 165 lldb_private::ConstString(module_name)); 166 } 167 } 168 return lldb::ModuleSP(); 169 } 170 171 TypeSP DWARFASTParserClang::ParseTypeFromClangModule(const SymbolContext &sc, 172 const DWARFDIE &die, 173 Log *log) { 174 ModuleSP clang_module_sp = GetContainingClangModule(die); 175 if (!clang_module_sp) 176 return TypeSP(); 177 178 // If this type comes from a Clang module, recursively look in the 179 // DWARF section of the .pcm file in the module cache. Clang 180 // generates DWO skeleton units as breadcrumbs to find them. 181 llvm::SmallVector<CompilerContext, 4> decl_context; 182 die.GetDeclContext(decl_context); 183 TypeMap pcm_types; 184 185 // The type in the Clang module must have the same language as the current CU. 186 LanguageSet languages; 187 languages.Insert(die.GetCU()->GetLanguageType()); 188 llvm::DenseSet<SymbolFile *> searched_symbol_files; 189 clang_module_sp->GetSymbolFile()->FindTypes(decl_context, languages, 190 searched_symbol_files, pcm_types); 191 if (pcm_types.Empty()) { 192 // Since this type is defined in one of the Clang modules imported 193 // by this symbol file, search all of them. Instead of calling 194 // sym_file->FindTypes(), which would return this again, go straight 195 // to the imported modules. 196 auto &sym_file = die.GetCU()->GetSymbolFileDWARF(); 197 198 // Well-formed clang modules never form cycles; guard against corrupted 199 // ones by inserting the current file. 200 searched_symbol_files.insert(&sym_file); 201 sym_file.ForEachExternalModule( 202 *sc.comp_unit, searched_symbol_files, [&](Module &module) { 203 module.GetSymbolFile()->FindTypes(decl_context, languages, 204 searched_symbol_files, pcm_types); 205 return pcm_types.GetSize(); 206 }); 207 } 208 209 if (!pcm_types.GetSize()) 210 return TypeSP(); 211 212 // We found a real definition for this type in the Clang module, so lets use 213 // it and cache the fact that we found a complete type for this die. 214 TypeSP pcm_type_sp = pcm_types.GetTypeAtIndex(0); 215 if (!pcm_type_sp) 216 return TypeSP(); 217 218 lldb_private::CompilerType pcm_type = pcm_type_sp->GetForwardCompilerType(); 219 lldb_private::CompilerType type = 220 GetClangASTImporter().CopyType(m_ast, pcm_type); 221 222 if (!type) 223 return TypeSP(); 224 225 // Under normal operation pcm_type is a shallow forward declaration 226 // that gets completed later. This is necessary to support cyclic 227 // data structures. If, however, pcm_type is already complete (for 228 // example, because it was loaded for a different target before), 229 // the definition needs to be imported right away, too. 230 // Type::ResolveClangType() effectively ignores the ResolveState 231 // inside type_sp and only looks at IsDefined(), so it never calls 232 // ClangASTImporter::ASTImporterDelegate::ImportDefinitionTo(), 233 // which does extra work for Objective-C classes. This would result 234 // in only the forward declaration to be visible. 235 if (pcm_type.IsDefined()) 236 GetClangASTImporter().RequireCompleteType(ClangUtil::GetQualType(type)); 237 238 SymbolFileDWARF *dwarf = die.GetDWARF(); 239 TypeSP type_sp(new Type( 240 die.GetID(), dwarf, pcm_type_sp->GetName(), pcm_type_sp->GetByteSize(), 241 nullptr, LLDB_INVALID_UID, Type::eEncodingInvalid, 242 &pcm_type_sp->GetDeclaration(), type, Type::ResolveState::Forward)); 243 244 dwarf->GetTypeList().Insert(type_sp); 245 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 246 clang::TagDecl *tag_decl = ClangASTContext::GetAsTagDecl(type); 247 if (tag_decl) 248 LinkDeclContextToDIE(tag_decl, die); 249 else { 250 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE(die); 251 if (defn_decl_ctx) 252 LinkDeclContextToDIE(defn_decl_ctx, die); 253 } 254 255 return type_sp; 256 } 257 258 static void CompleteExternalTagDeclType(ClangASTImporter &ast_importer, 259 clang::DeclContext *decl_ctx, 260 DWARFDIE die, 261 const char *type_name_cstr) { 262 auto *tag_decl_ctx = clang::dyn_cast<clang::TagDecl>(decl_ctx); 263 if (!tag_decl_ctx) 264 return; 265 266 // If this type was not imported from an external AST, there's nothing to do. 267 CompilerType type = ClangASTContext::GetTypeForDecl(tag_decl_ctx); 268 if (!type || !ast_importer.CanImport(type)) 269 return; 270 271 auto qual_type = ClangUtil::GetQualType(type); 272 if (!ast_importer.RequireCompleteType(qual_type)) { 273 die.GetDWARF()->GetObjectFile()->GetModule()->ReportError( 274 "Unable to complete the Decl context for DIE '%s' at offset " 275 "0x%8.8x.\nPlease file a bug report.", 276 type_name_cstr ? type_name_cstr : "", die.GetOffset()); 277 // We need to make the type look complete otherwise, we might crash in 278 // Clang when adding children. 279 if (ClangASTContext::StartTagDeclarationDefinition(type)) 280 ClangASTContext::CompleteTagDeclarationDefinition(type); 281 } 282 } 283 284 ParsedDWARFTypeAttributes::ParsedDWARFTypeAttributes(const DWARFDIE &die) { 285 DWARFAttributes attributes; 286 size_t num_attributes = die.GetAttributes(attributes); 287 for (size_t i = 0; i < num_attributes; ++i) { 288 dw_attr_t attr = attributes.AttributeAtIndex(i); 289 DWARFFormValue form_value; 290 if (!attributes.ExtractFormValueAtIndex(i, form_value)) 291 continue; 292 switch (attr) { 293 case DW_AT_abstract_origin: 294 abstract_origin = form_value; 295 break; 296 297 case DW_AT_accessibility: 298 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 299 break; 300 301 case DW_AT_artificial: 302 is_artificial = form_value.Boolean(); 303 break; 304 305 case DW_AT_bit_stride: 306 bit_stride = form_value.Unsigned(); 307 break; 308 309 case DW_AT_byte_size: 310 byte_size = form_value.Unsigned(); 311 break; 312 313 case DW_AT_byte_stride: 314 byte_stride = form_value.Unsigned(); 315 break; 316 317 case DW_AT_calling_convention: 318 calling_convention = form_value.Unsigned(); 319 break; 320 321 case DW_AT_containing_type: 322 containing_type = form_value; 323 break; 324 325 case DW_AT_decl_file: 326 decl.SetFile(die.GetCU()->GetFile(form_value.Unsigned())); 327 break; 328 case DW_AT_decl_line: 329 decl.SetLine(form_value.Unsigned()); 330 break; 331 case DW_AT_decl_column: 332 decl.SetColumn(form_value.Unsigned()); 333 break; 334 335 case DW_AT_declaration: 336 is_forward_declaration = form_value.Boolean(); 337 break; 338 339 case DW_AT_encoding: 340 encoding = form_value.Unsigned(); 341 break; 342 343 case DW_AT_enum_class: 344 is_scoped_enum = form_value.Boolean(); 345 break; 346 347 case DW_AT_explicit: 348 is_explicit = form_value.Boolean(); 349 break; 350 351 case DW_AT_external: 352 if (form_value.Unsigned()) 353 storage = clang::SC_Extern; 354 break; 355 356 case DW_AT_inline: 357 is_inline = form_value.Boolean(); 358 break; 359 360 case DW_AT_linkage_name: 361 case DW_AT_MIPS_linkage_name: 362 mangled_name = form_value.AsCString(); 363 break; 364 365 case DW_AT_name: 366 name.SetCString(form_value.AsCString()); 367 break; 368 369 case DW_AT_object_pointer: 370 object_pointer = form_value.Reference(); 371 break; 372 373 case DW_AT_signature: 374 signature = form_value; 375 break; 376 377 case DW_AT_specification: 378 specification = form_value; 379 break; 380 381 case DW_AT_type: 382 type = form_value; 383 break; 384 385 case DW_AT_virtuality: 386 is_virtual = form_value.Boolean(); 387 break; 388 389 case DW_AT_APPLE_objc_complete_type: 390 is_complete_objc_class = form_value.Signed(); 391 break; 392 393 case DW_AT_APPLE_objc_direct: 394 is_objc_direct_call = true; 395 break; 396 397 case DW_AT_APPLE_runtime_class: 398 class_language = (LanguageType)form_value.Signed(); 399 break; 400 401 case DW_AT_GNU_vector: 402 is_vector = form_value.Boolean(); 403 break; 404 case DW_AT_export_symbols: 405 exports_symbols = form_value.Boolean(); 406 break; 407 } 408 } 409 } 410 411 static std::string GetUnitName(const DWARFDIE &die) { 412 if (DWARFUnit *unit = die.GetCU()) 413 return unit->GetAbsolutePath().GetPath(); 414 return "<missing DWARF unit path>"; 415 } 416 417 TypeSP DWARFASTParserClang::ParseTypeFromDWARF(const SymbolContext &sc, 418 const DWARFDIE &die, 419 bool *type_is_new_ptr) { 420 if (type_is_new_ptr) 421 *type_is_new_ptr = false; 422 423 if (!die) 424 return nullptr; 425 426 Log *log(LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION | 427 DWARF_LOG_LOOKUPS)); 428 429 SymbolFileDWARF *dwarf = die.GetDWARF(); 430 if (log) { 431 DWARFDIE context_die; 432 clang::DeclContext *context = 433 GetClangDeclContextContainingDIE(die, &context_die); 434 435 dwarf->GetObjectFile()->GetModule()->LogMessage( 436 log, 437 "DWARFASTParserClang::ParseTypeFromDWARF " 438 "(die = 0x%8.8x, decl_ctx = %p (die 0x%8.8x)) %s name = '%s')", 439 die.GetOffset(), static_cast<void *>(context), context_die.GetOffset(), 440 die.GetTagAsCString(), die.GetName()); 441 } 442 443 Type *type_ptr = dwarf->GetDIEToType().lookup(die.GetDIE()); 444 if (type_ptr == DIE_IS_BEING_PARSED) 445 return nullptr; 446 if (type_ptr) 447 return type_ptr->shared_from_this(); 448 // Set a bit that lets us know that we are currently parsing this 449 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 450 451 ParsedDWARFTypeAttributes attrs(die); 452 453 if (DWARFDIE signature_die = attrs.signature.Reference()) { 454 if (TypeSP type_sp = 455 ParseTypeFromDWARF(sc, signature_die, type_is_new_ptr)) { 456 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 457 if (clang::DeclContext *decl_ctx = 458 GetCachedClangDeclContextForDIE(signature_die)) 459 LinkDeclContextToDIE(decl_ctx, die); 460 return type_sp; 461 } 462 return nullptr; 463 } 464 465 if (type_is_new_ptr) 466 *type_is_new_ptr = true; 467 468 const dw_tag_t tag = die.Tag(); 469 470 TypeSP type_sp; 471 472 switch (tag) { 473 case DW_TAG_typedef: 474 case DW_TAG_base_type: 475 case DW_TAG_pointer_type: 476 case DW_TAG_reference_type: 477 case DW_TAG_rvalue_reference_type: 478 case DW_TAG_const_type: 479 case DW_TAG_restrict_type: 480 case DW_TAG_volatile_type: 481 case DW_TAG_atomic_type: 482 case DW_TAG_unspecified_type: { 483 type_sp = ParseTypeModifier(sc, die, attrs); 484 break; 485 } 486 487 case DW_TAG_structure_type: 488 case DW_TAG_union_type: 489 case DW_TAG_class_type: { 490 type_sp = ParseStructureLikeDIE(sc, die, attrs); 491 break; 492 } 493 494 case DW_TAG_enumeration_type: { 495 type_sp = ParseEnum(sc, die, attrs); 496 break; 497 } 498 499 case DW_TAG_inlined_subroutine: 500 case DW_TAG_subprogram: 501 case DW_TAG_subroutine_type: { 502 type_sp = ParseSubroutine(die, attrs); 503 break; 504 } 505 case DW_TAG_array_type: { 506 type_sp = ParseArrayType(die, attrs); 507 break; 508 } 509 case DW_TAG_ptr_to_member_type: { 510 type_sp = ParsePointerToMemberType(die, attrs); 511 break; 512 } 513 default: 514 dwarf->GetObjectFile()->GetModule()->ReportError( 515 "{0x%8.8x}: unhandled type tag 0x%4.4x (%s), please file a bug and " 516 "attach the file at the start of this error message", 517 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 518 break; 519 } 520 521 // TODO: We should consider making the switch above exhaustive to simplify 522 // control flow in ParseTypeFromDWARF. Then, we could simply replace this 523 // return statement with a call to llvm_unreachable. 524 return UpdateSymbolContextScopeForType(sc, die, type_sp); 525 } 526 527 lldb::TypeSP 528 DWARFASTParserClang::ParseTypeModifier(const SymbolContext &sc, 529 const DWARFDIE &die, 530 ParsedDWARFTypeAttributes &attrs) { 531 Log *log(LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION | 532 DWARF_LOG_LOOKUPS)); 533 SymbolFileDWARF *dwarf = die.GetDWARF(); 534 const dw_tag_t tag = die.Tag(); 535 LanguageType cu_language = die.GetLanguage(); 536 Type::ResolveState resolve_state = Type::ResolveState::Unresolved; 537 Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID; 538 TypeSP type_sp; 539 CompilerType clang_type; 540 541 if (tag == DW_TAG_typedef && attrs.type.IsValid()) { 542 // Try to parse a typedef from the (DWARF embedded in the) Clang 543 // module file first as modules can contain typedef'ed 544 // structures that have no names like: 545 // 546 // typedef struct { int a; } Foo; 547 // 548 // In this case we will have a structure with no name and a 549 // typedef named "Foo" that points to this unnamed 550 // structure. The name in the typedef is the only identifier for 551 // the struct, so always try to get typedefs from Clang modules 552 // if possible. 553 // 554 // The type_sp returned will be empty if the typedef doesn't 555 // exist in a module file, so it is cheap to call this function 556 // just to check. 557 // 558 // If we don't do this we end up creating a TypeSP that says 559 // this is a typedef to type 0x123 (the DW_AT_type value would 560 // be 0x123 in the DW_TAG_typedef), and this is the unnamed 561 // structure type. We will have a hard time tracking down an 562 // unnammed structure type in the module debug info, so we make 563 // sure we don't get into this situation by always resolving 564 // typedefs from the module. 565 const DWARFDIE encoding_die = attrs.type.Reference(); 566 567 // First make sure that the die that this is typedef'ed to _is_ 568 // just a declaration (DW_AT_declaration == 1), not a full 569 // definition since template types can't be represented in 570 // modules since only concrete instances of templates are ever 571 // emitted and modules won't contain those 572 if (encoding_die && 573 encoding_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 574 type_sp = ParseTypeFromClangModule(sc, die, log); 575 if (type_sp) 576 return type_sp; 577 } 578 } 579 580 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\") type => 0x%8.8lx\n", die.GetID(), 581 DW_TAG_value_to_name(tag), type_name_cstr, 582 encoding_uid.Reference()); 583 584 switch (tag) { 585 default: 586 break; 587 588 case DW_TAG_unspecified_type: 589 if (attrs.name == "nullptr_t" || attrs.name == "decltype(nullptr)") { 590 resolve_state = Type::ResolveState::Full; 591 clang_type = m_ast.GetBasicType(eBasicTypeNullPtr); 592 break; 593 } 594 // Fall through to base type below in case we can handle the type 595 // there... 596 LLVM_FALLTHROUGH; 597 598 case DW_TAG_base_type: 599 resolve_state = Type::ResolveState::Full; 600 clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize( 601 attrs.name.GetCString(), attrs.encoding, 602 attrs.byte_size.getValueOr(0) * 8); 603 break; 604 605 case DW_TAG_pointer_type: 606 encoding_data_type = Type::eEncodingIsPointerUID; 607 break; 608 case DW_TAG_reference_type: 609 encoding_data_type = Type::eEncodingIsLValueReferenceUID; 610 break; 611 case DW_TAG_rvalue_reference_type: 612 encoding_data_type = Type::eEncodingIsRValueReferenceUID; 613 break; 614 case DW_TAG_typedef: 615 encoding_data_type = Type::eEncodingIsTypedefUID; 616 break; 617 case DW_TAG_const_type: 618 encoding_data_type = Type::eEncodingIsConstUID; 619 break; 620 case DW_TAG_restrict_type: 621 encoding_data_type = Type::eEncodingIsRestrictUID; 622 break; 623 case DW_TAG_volatile_type: 624 encoding_data_type = Type::eEncodingIsVolatileUID; 625 break; 626 case DW_TAG_atomic_type: 627 encoding_data_type = Type::eEncodingIsAtomicUID; 628 break; 629 } 630 631 if (!clang_type && (encoding_data_type == Type::eEncodingIsPointerUID || 632 encoding_data_type == Type::eEncodingIsTypedefUID)) { 633 if (tag == DW_TAG_pointer_type) { 634 DWARFDIE target_die = die.GetReferencedDIE(DW_AT_type); 635 636 if (target_die.GetAttributeValueAsUnsigned(DW_AT_APPLE_block, 0)) { 637 // Blocks have a __FuncPtr inside them which is a pointer to a 638 // function of the proper type. 639 640 for (DWARFDIE child_die = target_die.GetFirstChild(); 641 child_die.IsValid(); child_die = child_die.GetSibling()) { 642 if (!strcmp(child_die.GetAttributeValueAsString(DW_AT_name, ""), 643 "__FuncPtr")) { 644 DWARFDIE function_pointer_type = 645 child_die.GetReferencedDIE(DW_AT_type); 646 647 if (function_pointer_type) { 648 DWARFDIE function_type = 649 function_pointer_type.GetReferencedDIE(DW_AT_type); 650 651 bool function_type_is_new_pointer; 652 TypeSP lldb_function_type_sp = ParseTypeFromDWARF( 653 sc, function_type, &function_type_is_new_pointer); 654 655 if (lldb_function_type_sp) { 656 clang_type = m_ast.CreateBlockPointerType( 657 lldb_function_type_sp->GetForwardCompilerType()); 658 encoding_data_type = Type::eEncodingIsUID; 659 attrs.type.Clear(); 660 resolve_state = Type::ResolveState::Full; 661 } 662 } 663 664 break; 665 } 666 } 667 } 668 } 669 670 if (cu_language == eLanguageTypeObjC || 671 cu_language == eLanguageTypeObjC_plus_plus) { 672 if (attrs.name) { 673 if (attrs.name == "id") { 674 if (log) 675 dwarf->GetObjectFile()->GetModule()->LogMessage( 676 log, 677 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 678 "is Objective-C 'id' built-in type.", 679 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 680 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 681 encoding_data_type = Type::eEncodingIsUID; 682 attrs.type.Clear(); 683 resolve_state = Type::ResolveState::Full; 684 } else if (attrs.name == "Class") { 685 if (log) 686 dwarf->GetObjectFile()->GetModule()->LogMessage( 687 log, 688 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 689 "is Objective-C 'Class' built-in type.", 690 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 691 clang_type = m_ast.GetBasicType(eBasicTypeObjCClass); 692 encoding_data_type = Type::eEncodingIsUID; 693 attrs.type.Clear(); 694 resolve_state = Type::ResolveState::Full; 695 } else if (attrs.name == "SEL") { 696 if (log) 697 dwarf->GetObjectFile()->GetModule()->LogMessage( 698 log, 699 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 700 "is Objective-C 'selector' built-in type.", 701 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 702 clang_type = m_ast.GetBasicType(eBasicTypeObjCSel); 703 encoding_data_type = Type::eEncodingIsUID; 704 attrs.type.Clear(); 705 resolve_state = Type::ResolveState::Full; 706 } 707 } else if (encoding_data_type == Type::eEncodingIsPointerUID && 708 attrs.type.IsValid()) { 709 // Clang sometimes erroneously emits id as objc_object*. In that 710 // case we fix up the type to "id". 711 712 const DWARFDIE encoding_die = attrs.type.Reference(); 713 714 if (encoding_die && encoding_die.Tag() == DW_TAG_structure_type) { 715 llvm::StringRef struct_name = encoding_die.GetName(); 716 if (struct_name == "objc_object") { 717 if (log) 718 dwarf->GetObjectFile()->GetModule()->LogMessage( 719 log, 720 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s " 721 "'%s' is 'objc_object*', which we overrode to " 722 "'id'.", 723 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 724 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 725 encoding_data_type = Type::eEncodingIsUID; 726 attrs.type.Clear(); 727 resolve_state = Type::ResolveState::Full; 728 } 729 } 730 } 731 } 732 } 733 734 type_sp = std::make_shared<Type>( 735 die.GetID(), dwarf, attrs.name, attrs.byte_size, nullptr, 736 dwarf->GetUID(attrs.type.Reference()), encoding_data_type, &attrs.decl, 737 clang_type, resolve_state); 738 739 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 740 return type_sp; 741 } 742 743 TypeSP DWARFASTParserClang::ParseEnum(const SymbolContext &sc, 744 const DWARFDIE &die, 745 ParsedDWARFTypeAttributes &attrs) { 746 Log *log(LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION | 747 DWARF_LOG_LOOKUPS)); 748 SymbolFileDWARF *dwarf = die.GetDWARF(); 749 const dw_tag_t tag = die.Tag(); 750 TypeSP type_sp; 751 752 if (attrs.is_forward_declaration) { 753 type_sp = ParseTypeFromClangModule(sc, die, log); 754 if (type_sp) 755 return type_sp; 756 757 DWARFDeclContext die_decl_ctx; 758 die.GetDWARFDeclContext(die_decl_ctx); 759 760 type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx); 761 762 if (!type_sp) { 763 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 764 if (debug_map_symfile) { 765 // We weren't able to find a full declaration in this DWARF, 766 // see if we have a declaration anywhere else... 767 type_sp = debug_map_symfile->FindDefinitionTypeForDWARFDeclContext( 768 die_decl_ctx); 769 } 770 } 771 772 if (type_sp) { 773 if (log) { 774 dwarf->GetObjectFile()->GetModule()->LogMessage( 775 log, 776 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 777 "forward declaration, complete type is 0x%8.8" PRIx64, 778 static_cast<void *>(this), die.GetOffset(), 779 DW_TAG_value_to_name(tag), attrs.name.GetCString(), 780 type_sp->GetID()); 781 } 782 783 // We found a real definition for this type elsewhere so lets use 784 // it and cache the fact that we found a complete type for this 785 // die 786 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 787 clang::DeclContext *defn_decl_ctx = 788 GetCachedClangDeclContextForDIE(dwarf->GetDIE(type_sp->GetID())); 789 if (defn_decl_ctx) 790 LinkDeclContextToDIE(defn_decl_ctx, die); 791 return type_sp; 792 } 793 } 794 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 795 DW_TAG_value_to_name(tag), type_name_cstr); 796 797 CompilerType enumerator_clang_type; 798 CompilerType clang_type; 799 clang_type.SetCompilerType( 800 &m_ast, dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE())); 801 if (!clang_type) { 802 if (attrs.type.IsValid()) { 803 Type *enumerator_type = 804 dwarf->ResolveTypeUID(attrs.type.Reference(), true); 805 if (enumerator_type) 806 enumerator_clang_type = enumerator_type->GetFullCompilerType(); 807 } 808 809 if (!enumerator_clang_type) { 810 if (attrs.byte_size) { 811 enumerator_clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize( 812 NULL, DW_ATE_signed, *attrs.byte_size * 8); 813 } else { 814 enumerator_clang_type = m_ast.GetBasicType(eBasicTypeInt); 815 } 816 } 817 818 clang_type = m_ast.CreateEnumerationType( 819 attrs.name.GetCString(), GetClangDeclContextContainingDIE(die, nullptr), 820 attrs.decl, enumerator_clang_type, attrs.is_scoped_enum); 821 } else { 822 enumerator_clang_type = 823 m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType()); 824 } 825 826 LinkDeclContextToDIE(ClangASTContext::GetDeclContextForType(clang_type), die); 827 828 type_sp = std::make_shared<Type>( 829 die.GetID(), dwarf, attrs.name, attrs.byte_size, nullptr, 830 dwarf->GetUID(attrs.type.Reference()), Type::eEncodingIsUID, &attrs.decl, 831 clang_type, Type::ResolveState::Forward); 832 833 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 834 if (die.HasChildren()) { 835 bool is_signed = false; 836 enumerator_clang_type.IsIntegerType(is_signed); 837 ParseChildEnumerators(clang_type, is_signed, 838 type_sp->GetByteSize().getValueOr(0), die); 839 } 840 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 841 } else { 842 dwarf->GetObjectFile()->GetModule()->ReportError( 843 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 844 "definition.\nPlease file a bug and attach the file at the " 845 "start of this error message", 846 die.GetOffset(), attrs.name.GetCString()); 847 } 848 return type_sp; 849 } 850 851 TypeSP DWARFASTParserClang::ParseSubroutine(const DWARFDIE &die, 852 ParsedDWARFTypeAttributes &attrs) { 853 Log *log(LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION | 854 DWARF_LOG_LOOKUPS)); 855 856 SymbolFileDWARF *dwarf = die.GetDWARF(); 857 const dw_tag_t tag = die.Tag(); 858 859 bool is_variadic = false; 860 bool is_static = false; 861 bool has_template_params = false; 862 863 unsigned type_quals = 0; 864 865 std::string object_pointer_name; 866 if (attrs.object_pointer) { 867 const char *object_pointer_name_cstr = attrs.object_pointer.GetName(); 868 if (object_pointer_name_cstr) 869 object_pointer_name = object_pointer_name_cstr; 870 } 871 872 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 873 DW_TAG_value_to_name(tag), type_name_cstr); 874 875 CompilerType return_clang_type; 876 Type *func_type = NULL; 877 878 if (attrs.type.IsValid()) 879 func_type = dwarf->ResolveTypeUID(attrs.type.Reference(), true); 880 881 if (func_type) 882 return_clang_type = func_type->GetForwardCompilerType(); 883 else 884 return_clang_type = m_ast.GetBasicType(eBasicTypeVoid); 885 886 std::vector<CompilerType> function_param_types; 887 std::vector<clang::ParmVarDecl *> function_param_decls; 888 889 // Parse the function children for the parameters 890 891 DWARFDIE decl_ctx_die; 892 clang::DeclContext *containing_decl_ctx = 893 GetClangDeclContextContainingDIE(die, &decl_ctx_die); 894 const clang::Decl::Kind containing_decl_kind = 895 containing_decl_ctx->getDeclKind(); 896 897 bool is_cxx_method = DeclKindIsCXXClass(containing_decl_kind); 898 // Start off static. This will be set to false in 899 // ParseChildParameters(...) if we find a "this" parameters as the 900 // first parameter 901 if (is_cxx_method) { 902 is_static = true; 903 } 904 905 if (die.HasChildren()) { 906 bool skip_artificial = true; 907 ParseChildParameters(containing_decl_ctx, die, skip_artificial, is_static, 908 is_variadic, has_template_params, 909 function_param_types, function_param_decls, 910 type_quals); 911 } 912 913 bool ignore_containing_context = false; 914 // Check for templatized class member functions. If we had any 915 // DW_TAG_template_type_parameter or DW_TAG_template_value_parameter 916 // the DW_TAG_subprogram DIE, then we can't let this become a method in 917 // a class. Why? Because templatized functions are only emitted if one 918 // of the templatized methods is used in the current compile unit and 919 // we will end up with classes that may or may not include these member 920 // functions and this means one class won't match another class 921 // definition and it affects our ability to use a class in the clang 922 // expression parser. So for the greater good, we currently must not 923 // allow any template member functions in a class definition. 924 if (is_cxx_method && has_template_params) { 925 ignore_containing_context = true; 926 is_cxx_method = false; 927 } 928 929 // clang_type will get the function prototype clang type after this 930 // call 931 CompilerType clang_type = m_ast.CreateFunctionType( 932 return_clang_type, function_param_types.data(), 933 function_param_types.size(), is_variadic, type_quals); 934 935 if (attrs.name) { 936 bool type_handled = false; 937 if (tag == DW_TAG_subprogram || tag == DW_TAG_inlined_subroutine) { 938 ObjCLanguage::MethodName objc_method(attrs.name.GetStringRef(), true); 939 if (objc_method.IsValid(true)) { 940 CompilerType class_opaque_type; 941 ConstString class_name(objc_method.GetClassName()); 942 if (class_name) { 943 TypeSP complete_objc_class_type_sp( 944 dwarf->FindCompleteObjCDefinitionTypeForDIE(DWARFDIE(), 945 class_name, false)); 946 947 if (complete_objc_class_type_sp) { 948 CompilerType type_clang_forward_type = 949 complete_objc_class_type_sp->GetForwardCompilerType(); 950 if (ClangASTContext::IsObjCObjectOrInterfaceType( 951 type_clang_forward_type)) 952 class_opaque_type = type_clang_forward_type; 953 } 954 } 955 956 if (class_opaque_type) { 957 // If accessibility isn't set to anything valid, assume public 958 // for now... 959 if (attrs.accessibility == eAccessNone) 960 attrs.accessibility = eAccessPublic; 961 962 clang::ObjCMethodDecl *objc_method_decl = 963 m_ast.AddMethodToObjCObjectType( 964 class_opaque_type, attrs.name.GetCString(), clang_type, 965 attrs.accessibility, attrs.is_artificial, is_variadic, 966 attrs.is_objc_direct_call); 967 type_handled = objc_method_decl != NULL; 968 if (type_handled) { 969 LinkDeclContextToDIE(objc_method_decl, die); 970 m_ast.SetMetadataAsUserID(objc_method_decl, die.GetID()); 971 } else { 972 dwarf->GetObjectFile()->GetModule()->ReportError( 973 "{0x%8.8x}: invalid Objective-C method 0x%4.4x (%s), " 974 "please file a bug and attach the file at the start of " 975 "this error message", 976 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 977 } 978 } 979 } else if (is_cxx_method) { 980 // Look at the parent of this DIE and see if is is a class or 981 // struct and see if this is actually a C++ method 982 Type *class_type = dwarf->ResolveType(decl_ctx_die); 983 if (class_type) { 984 bool alternate_defn = false; 985 if (class_type->GetID() != decl_ctx_die.GetID() || 986 IsClangModuleFwdDecl(decl_ctx_die)) { 987 alternate_defn = true; 988 989 // We uniqued the parent class of this function to another 990 // class so we now need to associate all dies under 991 // "decl_ctx_die" to DIEs in the DIE for "class_type"... 992 DWARFDIE class_type_die = dwarf->GetDIE(class_type->GetID()); 993 994 if (class_type_die) { 995 std::vector<DWARFDIE> failures; 996 997 CopyUniqueClassMethodTypes(decl_ctx_die, class_type_die, 998 class_type, failures); 999 1000 // FIXME do something with these failures that's 1001 // smarter than just dropping them on the ground. 1002 // Unfortunately classes don't like having stuff added 1003 // to them after their definitions are complete... 1004 1005 Type *type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1006 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1007 return type_ptr->shared_from_this(); 1008 } 1009 } 1010 } 1011 1012 if (attrs.specification.IsValid()) { 1013 // We have a specification which we are going to base our 1014 // function prototype off of, so we need this type to be 1015 // completed so that the m_die_to_decl_ctx for the method in 1016 // the specification has a valid clang decl context. 1017 class_type->GetForwardCompilerType(); 1018 // If we have a specification, then the function type should 1019 // have been made with the specification and not with this 1020 // die. 1021 DWARFDIE spec_die = attrs.specification.Reference(); 1022 clang::DeclContext *spec_clang_decl_ctx = 1023 GetClangDeclContextForDIE(spec_die); 1024 if (spec_clang_decl_ctx) { 1025 LinkDeclContextToDIE(spec_clang_decl_ctx, die); 1026 } else { 1027 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1028 "0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8x" 1029 ") has no decl\n", 1030 die.GetID(), spec_die.GetOffset()); 1031 } 1032 type_handled = true; 1033 } else if (attrs.abstract_origin.IsValid()) { 1034 // We have a specification which we are going to base our 1035 // function prototype off of, so we need this type to be 1036 // completed so that the m_die_to_decl_ctx for the method in 1037 // the abstract origin has a valid clang decl context. 1038 class_type->GetForwardCompilerType(); 1039 1040 DWARFDIE abs_die = attrs.abstract_origin.Reference(); 1041 clang::DeclContext *abs_clang_decl_ctx = 1042 GetClangDeclContextForDIE(abs_die); 1043 if (abs_clang_decl_ctx) { 1044 LinkDeclContextToDIE(abs_clang_decl_ctx, die); 1045 } else { 1046 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1047 "0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8x" 1048 ") has no decl\n", 1049 die.GetID(), abs_die.GetOffset()); 1050 } 1051 type_handled = true; 1052 } else { 1053 CompilerType class_opaque_type = 1054 class_type->GetForwardCompilerType(); 1055 if (ClangASTContext::IsCXXClassType(class_opaque_type)) { 1056 if (class_opaque_type.IsBeingDefined() || alternate_defn) { 1057 if (!is_static && !die.HasChildren()) { 1058 // We have a C++ member function with no children (this 1059 // pointer!) and clang will get mad if we try and make 1060 // a function that isn't well formed in the DWARF, so 1061 // we will just skip it... 1062 type_handled = true; 1063 } else { 1064 bool add_method = true; 1065 if (alternate_defn) { 1066 // If an alternate definition for the class exists, 1067 // then add the method only if an equivalent is not 1068 // already present. 1069 clang::CXXRecordDecl *record_decl = 1070 m_ast.GetAsCXXRecordDecl( 1071 class_opaque_type.GetOpaqueQualType()); 1072 if (record_decl) { 1073 for (auto method_iter = record_decl->method_begin(); 1074 method_iter != record_decl->method_end(); 1075 method_iter++) { 1076 clang::CXXMethodDecl *method_decl = *method_iter; 1077 if (method_decl->getNameInfo().getAsString() == 1078 attrs.name.GetStringRef()) { 1079 if (method_decl->getType() == 1080 ClangUtil::GetQualType(clang_type)) { 1081 add_method = false; 1082 LinkDeclContextToDIE(method_decl, die); 1083 type_handled = true; 1084 1085 break; 1086 } 1087 } 1088 } 1089 } 1090 } 1091 1092 if (add_method) { 1093 llvm::PrettyStackTraceFormat stack_trace( 1094 "SymbolFileDWARF::ParseType() is adding a method " 1095 "%s to class %s in DIE 0x%8.8" PRIx64 " from %s", 1096 attrs.name.GetCString(), 1097 class_type->GetName().GetCString(), die.GetID(), 1098 dwarf->GetObjectFile() 1099 ->GetFileSpec() 1100 .GetPath() 1101 .c_str()); 1102 1103 const bool is_attr_used = false; 1104 // Neither GCC 4.2 nor clang++ currently set a valid 1105 // accessibility in the DWARF for C++ methods... 1106 // Default to public for now... 1107 if (attrs.accessibility == eAccessNone) 1108 attrs.accessibility = eAccessPublic; 1109 1110 clang::CXXMethodDecl *cxx_method_decl = 1111 m_ast.AddMethodToCXXRecordType( 1112 class_opaque_type.GetOpaqueQualType(), 1113 attrs.name.GetCString(), attrs.mangled_name, 1114 clang_type, attrs.accessibility, attrs.is_virtual, 1115 is_static, attrs.is_inline, attrs.is_explicit, 1116 is_attr_used, attrs.is_artificial); 1117 1118 type_handled = cxx_method_decl != NULL; 1119 // Artificial methods are always handled even when we 1120 // don't create a new declaration for them. 1121 type_handled |= attrs.is_artificial; 1122 1123 if (cxx_method_decl) { 1124 LinkDeclContextToDIE(cxx_method_decl, die); 1125 1126 ClangASTMetadata metadata; 1127 metadata.SetUserID(die.GetID()); 1128 1129 if (!object_pointer_name.empty()) { 1130 metadata.SetObjectPtrName( 1131 object_pointer_name.c_str()); 1132 LLDB_LOGF(log, 1133 "Setting object pointer name: %s on method " 1134 "object %p.\n", 1135 object_pointer_name.c_str(), 1136 static_cast<void *>(cxx_method_decl)); 1137 } 1138 m_ast.SetMetadata(cxx_method_decl, metadata); 1139 } else { 1140 ignore_containing_context = true; 1141 } 1142 } 1143 } 1144 } else { 1145 // We were asked to parse the type for a method in a 1146 // class, yet the class hasn't been asked to complete 1147 // itself through the clang::ExternalASTSource protocol, 1148 // so we need to just have the class complete itself and 1149 // do things the right way, then our 1150 // DIE should then have an entry in the 1151 // dwarf->GetDIEToType() map. First 1152 // we need to modify the dwarf->GetDIEToType() so it 1153 // doesn't think we are trying to parse this DIE 1154 // anymore... 1155 dwarf->GetDIEToType()[die.GetDIE()] = NULL; 1156 1157 // Now we get the full type to force our class type to 1158 // complete itself using the clang::ExternalASTSource 1159 // protocol which will parse all base classes and all 1160 // methods (including the method for this DIE). 1161 class_type->GetFullCompilerType(); 1162 1163 // The type for this DIE should have been filled in the 1164 // function call above 1165 Type *type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1166 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1167 return type_ptr->shared_from_this(); 1168 } 1169 1170 // FIXME This is fixing some even uglier behavior but we 1171 // really need to 1172 // uniq the methods of each class as well as the class 1173 // itself. <rdar://problem/11240464> 1174 type_handled = true; 1175 } 1176 } 1177 } 1178 } 1179 } 1180 } 1181 1182 if (!type_handled) { 1183 clang::FunctionDecl *function_decl = nullptr; 1184 clang::FunctionDecl *template_function_decl = nullptr; 1185 1186 if (attrs.abstract_origin.IsValid()) { 1187 DWARFDIE abs_die = attrs.abstract_origin.Reference(); 1188 1189 if (dwarf->ResolveType(abs_die)) { 1190 function_decl = llvm::dyn_cast_or_null<clang::FunctionDecl>( 1191 GetCachedClangDeclContextForDIE(abs_die)); 1192 1193 if (function_decl) { 1194 LinkDeclContextToDIE(function_decl, die); 1195 } 1196 } 1197 } 1198 1199 if (!function_decl) { 1200 // We just have a function that isn't part of a class 1201 function_decl = m_ast.CreateFunctionDeclaration( 1202 ignore_containing_context ? m_ast.GetTranslationUnitDecl() 1203 : containing_decl_ctx, 1204 attrs.name.GetCString(), clang_type, attrs.storage, 1205 attrs.is_inline); 1206 1207 if (has_template_params) { 1208 ClangASTContext::TemplateParameterInfos template_param_infos; 1209 ParseTemplateParameterInfos(die, template_param_infos); 1210 template_function_decl = m_ast.CreateFunctionDeclaration( 1211 ignore_containing_context ? m_ast.GetTranslationUnitDecl() 1212 : containing_decl_ctx, 1213 attrs.name.GetCString(), clang_type, attrs.storage, 1214 attrs.is_inline); 1215 clang::FunctionTemplateDecl *func_template_decl = 1216 m_ast.CreateFunctionTemplateDecl( 1217 containing_decl_ctx, template_function_decl, 1218 attrs.name.GetCString(), template_param_infos); 1219 m_ast.CreateFunctionTemplateSpecializationInfo( 1220 function_decl, func_template_decl, template_param_infos); 1221 } 1222 1223 lldbassert(function_decl); 1224 1225 if (function_decl) { 1226 LinkDeclContextToDIE(function_decl, die); 1227 1228 if (!function_param_decls.empty()) { 1229 m_ast.SetFunctionParameters(function_decl, 1230 &function_param_decls.front(), 1231 function_param_decls.size()); 1232 if (template_function_decl) 1233 m_ast.SetFunctionParameters(template_function_decl, 1234 &function_param_decls.front(), 1235 function_param_decls.size()); 1236 } 1237 1238 ClangASTMetadata metadata; 1239 metadata.SetUserID(die.GetID()); 1240 1241 if (!object_pointer_name.empty()) { 1242 metadata.SetObjectPtrName(object_pointer_name.c_str()); 1243 LLDB_LOGF(log, 1244 "Setting object pointer name: %s on function " 1245 "object %p.", 1246 object_pointer_name.c_str(), 1247 static_cast<void *>(function_decl)); 1248 } 1249 m_ast.SetMetadata(function_decl, metadata); 1250 } 1251 } 1252 } 1253 } 1254 return std::make_shared<Type>( 1255 die.GetID(), dwarf, attrs.name, llvm::None, nullptr, LLDB_INVALID_UID, 1256 Type::eEncodingIsUID, &attrs.decl, clang_type, Type::ResolveState::Full); 1257 } 1258 1259 TypeSP DWARFASTParserClang::ParseArrayType(const DWARFDIE &die, 1260 ParsedDWARFTypeAttributes &attrs) { 1261 SymbolFileDWARF *dwarf = die.GetDWARF(); 1262 1263 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1264 DW_TAG_value_to_name(tag), type_name_cstr); 1265 1266 DWARFDIE type_die = attrs.type.Reference(); 1267 Type *element_type = dwarf->ResolveTypeUID(type_die, true); 1268 1269 if (!element_type) 1270 return nullptr; 1271 1272 llvm::Optional<SymbolFile::ArrayInfo> array_info = ParseChildArrayInfo(die); 1273 if (array_info) { 1274 attrs.byte_stride = array_info->byte_stride; 1275 attrs.bit_stride = array_info->bit_stride; 1276 } 1277 if (attrs.byte_stride == 0 && attrs.bit_stride == 0) 1278 attrs.byte_stride = element_type->GetByteSize().getValueOr(0); 1279 CompilerType array_element_type = element_type->GetForwardCompilerType(); 1280 1281 if (ClangASTContext::IsCXXClassType(array_element_type) && 1282 !array_element_type.GetCompleteType()) { 1283 ModuleSP module_sp = die.GetModule(); 1284 if (module_sp) { 1285 if (die.GetCU()->GetProducer() == eProducerClang) 1286 module_sp->ReportError( 1287 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a " 1288 "class/union/struct element type DIE 0x%8.8x that is a " 1289 "forward declaration, not a complete definition.\nTry " 1290 "compiling the source file with -fstandalone-debug or " 1291 "disable -gmodules", 1292 die.GetOffset(), type_die.GetOffset()); 1293 else 1294 module_sp->ReportError( 1295 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a " 1296 "class/union/struct element type DIE 0x%8.8x that is a " 1297 "forward declaration, not a complete definition.\nPlease " 1298 "file a bug against the compiler and include the " 1299 "preprocessed output for %s", 1300 die.GetOffset(), type_die.GetOffset(), GetUnitName(die).c_str()); 1301 } 1302 1303 // We have no choice other than to pretend that the element class 1304 // type is complete. If we don't do this, clang will crash when 1305 // trying to layout the class. Since we provide layout 1306 // assistance, all ivars in this class and other classes will be 1307 // fine, this is the best we can do short of crashing. 1308 if (ClangASTContext::StartTagDeclarationDefinition(array_element_type)) { 1309 ClangASTContext::CompleteTagDeclarationDefinition(array_element_type); 1310 } else { 1311 module_sp->ReportError("DWARF DIE at 0x%8.8x was not able to " 1312 "start its definition.\nPlease file a " 1313 "bug and attach the file at the start " 1314 "of this error message", 1315 type_die.GetOffset()); 1316 } 1317 } 1318 1319 uint64_t array_element_bit_stride = 1320 attrs.byte_stride * 8 + attrs.bit_stride; 1321 CompilerType clang_type; 1322 if (array_info && array_info->element_orders.size() > 0) { 1323 uint64_t num_elements = 0; 1324 auto end = array_info->element_orders.rend(); 1325 for (auto pos = array_info->element_orders.rbegin(); pos != end; ++pos) { 1326 num_elements = *pos; 1327 clang_type = m_ast.CreateArrayType(array_element_type, num_elements, 1328 attrs.is_vector); 1329 array_element_type = clang_type; 1330 array_element_bit_stride = num_elements 1331 ? array_element_bit_stride * num_elements 1332 : array_element_bit_stride; 1333 } 1334 } else { 1335 clang_type = 1336 m_ast.CreateArrayType(array_element_type, 0, attrs.is_vector); 1337 } 1338 ConstString empty_name; 1339 TypeSP type_sp = std::make_shared<Type>( 1340 die.GetID(), dwarf, empty_name, array_element_bit_stride / 8, nullptr, 1341 dwarf->GetUID(type_die), Type::eEncodingIsUID, &attrs.decl, clang_type, 1342 Type::ResolveState::Full); 1343 type_sp->SetEncodingType(element_type); 1344 const clang::Type *type = ClangUtil::GetQualType(clang_type).getTypePtr(); 1345 m_ast.SetMetadataAsUserID(type, die.GetID()); 1346 return type_sp; 1347 } 1348 1349 TypeSP DWARFASTParserClang::ParsePointerToMemberType( 1350 const DWARFDIE &die, const ParsedDWARFTypeAttributes &attrs) { 1351 SymbolFileDWARF *dwarf = die.GetDWARF(); 1352 Type *pointee_type = dwarf->ResolveTypeUID(attrs.type.Reference(), true); 1353 Type *class_type = 1354 dwarf->ResolveTypeUID(attrs.containing_type.Reference(), true); 1355 1356 CompilerType pointee_clang_type = pointee_type->GetForwardCompilerType(); 1357 CompilerType class_clang_type = class_type->GetLayoutCompilerType(); 1358 1359 CompilerType clang_type = ClangASTContext::CreateMemberPointerType( 1360 class_clang_type, pointee_clang_type); 1361 1362 if (llvm::Optional<uint64_t> clang_type_size = 1363 clang_type.GetByteSize(nullptr)) { 1364 return std::make_shared<Type>(die.GetID(), dwarf, attrs.name, 1365 *clang_type_size, nullptr, LLDB_INVALID_UID, 1366 Type::eEncodingIsUID, nullptr, clang_type, 1367 Type::ResolveState::Forward); 1368 } 1369 return nullptr; 1370 } 1371 1372 TypeSP DWARFASTParserClang::UpdateSymbolContextScopeForType( 1373 const SymbolContext &sc, const DWARFDIE &die, TypeSP type_sp) { 1374 if (!type_sp) 1375 return type_sp; 1376 1377 SymbolFileDWARF *dwarf = die.GetDWARF(); 1378 TypeList &type_list = dwarf->GetTypeList(); 1379 DWARFDIE sc_parent_die = SymbolFileDWARF::GetParentSymbolContextDIE(die); 1380 dw_tag_t sc_parent_tag = sc_parent_die.Tag(); 1381 1382 SymbolContextScope *symbol_context_scope = nullptr; 1383 if (sc_parent_tag == DW_TAG_compile_unit || 1384 sc_parent_tag == DW_TAG_partial_unit) { 1385 symbol_context_scope = sc.comp_unit; 1386 } else if (sc.function != nullptr && sc_parent_die) { 1387 symbol_context_scope = 1388 sc.function->GetBlock(true).FindBlockByID(sc_parent_die.GetID()); 1389 if (symbol_context_scope == nullptr) 1390 symbol_context_scope = sc.function; 1391 } else { 1392 symbol_context_scope = sc.module_sp.get(); 1393 } 1394 1395 if (symbol_context_scope != nullptr) 1396 type_sp->SetSymbolContextScope(symbol_context_scope); 1397 1398 // We are ready to put this type into the uniqued list up at the module 1399 // level. 1400 type_list.Insert(type_sp); 1401 1402 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1403 return type_sp; 1404 } 1405 1406 TypeSP 1407 DWARFASTParserClang::ParseStructureLikeDIE(const SymbolContext &sc, 1408 const DWARFDIE &die, 1409 ParsedDWARFTypeAttributes &attrs) { 1410 TypeSP type_sp; 1411 CompilerType clang_type; 1412 const dw_tag_t tag = die.Tag(); 1413 SymbolFileDWARF *dwarf = die.GetDWARF(); 1414 LanguageType cu_language = die.GetLanguage(); 1415 Log *log = LogChannelDWARF::GetLogIfAll(DWARF_LOG_TYPE_COMPLETION | 1416 DWARF_LOG_LOOKUPS); 1417 1418 // UniqueDWARFASTType is large, so don't create a local variables on the 1419 // stack, put it on the heap. This function is often called recursively and 1420 // clang isn't good at sharing the stack space for variables in different 1421 // blocks. 1422 auto unique_ast_entry_up = std::make_unique<UniqueDWARFASTType>(); 1423 1424 ConstString unique_typename(attrs.name); 1425 Declaration unique_decl(attrs.decl); 1426 1427 if (attrs.name) { 1428 if (Language::LanguageIsCPlusPlus(cu_language)) { 1429 // For C++, we rely solely upon the one definition rule that says 1430 // only one thing can exist at a given decl context. We ignore the 1431 // file and line that things are declared on. 1432 std::string qualified_name; 1433 if (die.GetQualifiedName(qualified_name)) 1434 unique_typename = ConstString(qualified_name); 1435 unique_decl.Clear(); 1436 } 1437 1438 if (dwarf->GetUniqueDWARFASTTypeMap().Find( 1439 unique_typename, die, unique_decl, attrs.byte_size.getValueOr(-1), 1440 *unique_ast_entry_up)) { 1441 type_sp = unique_ast_entry_up->m_type_sp; 1442 if (type_sp) { 1443 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1444 LinkDeclContextToDIE( 1445 GetCachedClangDeclContextForDIE(unique_ast_entry_up->m_die), die); 1446 return type_sp; 1447 } 1448 } 1449 } 1450 1451 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1452 DW_TAG_value_to_name(tag), type_name_cstr); 1453 1454 int tag_decl_kind = -1; 1455 AccessType default_accessibility = eAccessNone; 1456 if (tag == DW_TAG_structure_type) { 1457 tag_decl_kind = clang::TTK_Struct; 1458 default_accessibility = eAccessPublic; 1459 } else if (tag == DW_TAG_union_type) { 1460 tag_decl_kind = clang::TTK_Union; 1461 default_accessibility = eAccessPublic; 1462 } else if (tag == DW_TAG_class_type) { 1463 tag_decl_kind = clang::TTK_Class; 1464 default_accessibility = eAccessPrivate; 1465 } 1466 1467 if (attrs.byte_size && *attrs.byte_size == 0 && attrs.name && 1468 !die.HasChildren() && cu_language == eLanguageTypeObjC) { 1469 // Work around an issue with clang at the moment where forward 1470 // declarations for objective C classes are emitted as: 1471 // DW_TAG_structure_type [2] 1472 // DW_AT_name( "ForwardObjcClass" ) 1473 // DW_AT_byte_size( 0x00 ) 1474 // DW_AT_decl_file( "..." ) 1475 // DW_AT_decl_line( 1 ) 1476 // 1477 // Note that there is no DW_AT_declaration and there are no children, 1478 // and the byte size is zero. 1479 attrs.is_forward_declaration = true; 1480 } 1481 1482 if (attrs.class_language == eLanguageTypeObjC || 1483 attrs.class_language == eLanguageTypeObjC_plus_plus) { 1484 if (!attrs.is_complete_objc_class && 1485 die.Supports_DW_AT_APPLE_objc_complete_type()) { 1486 // We have a valid eSymbolTypeObjCClass class symbol whose name 1487 // matches the current objective C class that we are trying to find 1488 // and this DIE isn't the complete definition (we checked 1489 // is_complete_objc_class above and know it is false), so the real 1490 // definition is in here somewhere 1491 type_sp = 1492 dwarf->FindCompleteObjCDefinitionTypeForDIE(die, attrs.name, true); 1493 1494 if (!type_sp) { 1495 SymbolFileDWARFDebugMap *debug_map_symfile = 1496 dwarf->GetDebugMapSymfile(); 1497 if (debug_map_symfile) { 1498 // We weren't able to find a full declaration in this DWARF, 1499 // see if we have a declaration anywhere else... 1500 type_sp = debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE( 1501 die, attrs.name, true); 1502 } 1503 } 1504 1505 if (type_sp) { 1506 if (log) { 1507 dwarf->GetObjectFile()->GetModule()->LogMessage( 1508 log, 1509 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is an " 1510 "incomplete objc type, complete type is 0x%8.8" PRIx64, 1511 static_cast<void *>(this), die.GetOffset(), 1512 DW_TAG_value_to_name(tag), attrs.name.GetCString(), 1513 type_sp->GetID()); 1514 } 1515 1516 // We found a real definition for this type elsewhere so lets use 1517 // it and cache the fact that we found a complete type for this 1518 // die 1519 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1520 return type_sp; 1521 } 1522 } 1523 } 1524 1525 if (attrs.is_forward_declaration) { 1526 // We have a forward declaration to a type and we need to try and 1527 // find a full declaration. We look in the current type index just in 1528 // case we have a forward declaration followed by an actual 1529 // declarations in the DWARF. If this fails, we need to look 1530 // elsewhere... 1531 if (log) { 1532 dwarf->GetObjectFile()->GetModule()->LogMessage( 1533 log, 1534 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 1535 "forward declaration, trying to find complete type", 1536 static_cast<void *>(this), die.GetOffset(), DW_TAG_value_to_name(tag), 1537 attrs.name.GetCString()); 1538 } 1539 1540 // See if the type comes from a Clang module and if so, track down 1541 // that type. 1542 type_sp = ParseTypeFromClangModule(sc, die, log); 1543 if (type_sp) 1544 return type_sp; 1545 1546 DWARFDeclContext die_decl_ctx; 1547 die.GetDWARFDeclContext(die_decl_ctx); 1548 1549 // type_sp = FindDefinitionTypeForDIE (dwarf_cu, die, 1550 // type_name_const_str); 1551 type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx); 1552 1553 if (!type_sp) { 1554 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 1555 if (debug_map_symfile) { 1556 // We weren't able to find a full declaration in this DWARF, see 1557 // if we have a declaration anywhere else... 1558 type_sp = debug_map_symfile->FindDefinitionTypeForDWARFDeclContext( 1559 die_decl_ctx); 1560 } 1561 } 1562 1563 if (type_sp) { 1564 if (log) { 1565 dwarf->GetObjectFile()->GetModule()->LogMessage( 1566 log, 1567 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 1568 "forward declaration, complete type is 0x%8.8" PRIx64, 1569 static_cast<void *>(this), die.GetOffset(), 1570 DW_TAG_value_to_name(tag), attrs.name.GetCString(), 1571 type_sp->GetID()); 1572 } 1573 1574 // We found a real definition for this type elsewhere so lets use 1575 // it and cache the fact that we found a complete type for this die 1576 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1577 clang::DeclContext *defn_decl_ctx = 1578 GetCachedClangDeclContextForDIE(dwarf->GetDIE(type_sp->GetID())); 1579 if (defn_decl_ctx) 1580 LinkDeclContextToDIE(defn_decl_ctx, die); 1581 return type_sp; 1582 } 1583 } 1584 assert(tag_decl_kind != -1); 1585 bool clang_type_was_created = false; 1586 clang_type.SetCompilerType( 1587 &m_ast, dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE())); 1588 if (!clang_type) { 1589 clang::DeclContext *decl_ctx = 1590 GetClangDeclContextContainingDIE(die, nullptr); 1591 1592 // If your decl context is a record that was imported from another 1593 // AST context (in the gmodules case), we need to make sure the type 1594 // backing the Decl is complete before adding children to it. This is 1595 // not an issue in the non-gmodules case because the debug info will 1596 // always contain a full definition of parent types in that case. 1597 CompleteExternalTagDeclType(GetClangASTImporter(), decl_ctx, die, 1598 attrs.name.GetCString()); 1599 1600 if (attrs.accessibility == eAccessNone && decl_ctx) { 1601 // Check the decl context that contains this class/struct/union. If 1602 // it is a class we must give it an accessibility. 1603 const clang::Decl::Kind containing_decl_kind = decl_ctx->getDeclKind(); 1604 if (DeclKindIsCXXClass(containing_decl_kind)) 1605 attrs.accessibility = default_accessibility; 1606 } 1607 1608 ClangASTMetadata metadata; 1609 metadata.SetUserID(die.GetID()); 1610 metadata.SetIsDynamicCXXType(dwarf->ClassOrStructIsVirtual(die)); 1611 1612 if (attrs.name.GetStringRef().contains('<')) { 1613 ClangASTContext::TemplateParameterInfos template_param_infos; 1614 if (ParseTemplateParameterInfos(die, template_param_infos)) { 1615 clang::ClassTemplateDecl *class_template_decl = 1616 m_ast.ParseClassTemplateDecl(decl_ctx, attrs.accessibility, 1617 attrs.name.GetCString(), tag_decl_kind, 1618 template_param_infos); 1619 if (!class_template_decl) { 1620 if (log) { 1621 dwarf->GetObjectFile()->GetModule()->LogMessage( 1622 log, 1623 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" " 1624 "clang::ClassTemplateDecl failed to return a decl.", 1625 static_cast<void *>(this), die.GetOffset(), 1626 DW_TAG_value_to_name(tag), attrs.name.GetCString()); 1627 } 1628 return TypeSP(); 1629 } 1630 1631 clang::ClassTemplateSpecializationDecl *class_specialization_decl = 1632 m_ast.CreateClassTemplateSpecializationDecl( 1633 decl_ctx, class_template_decl, tag_decl_kind, 1634 template_param_infos); 1635 clang_type = m_ast.CreateClassTemplateSpecializationType( 1636 class_specialization_decl); 1637 clang_type_was_created = true; 1638 1639 m_ast.SetMetadata(class_template_decl, metadata); 1640 m_ast.SetMetadata(class_specialization_decl, metadata); 1641 } 1642 } 1643 1644 if (!clang_type_was_created) { 1645 clang_type_was_created = true; 1646 clang_type = m_ast.CreateRecordType( 1647 decl_ctx, attrs.accessibility, attrs.name.GetCString(), tag_decl_kind, 1648 attrs.class_language, &metadata, attrs.exports_symbols); 1649 } 1650 } 1651 1652 // Store a forward declaration to this class type in case any 1653 // parameters in any class methods need it for the clang types for 1654 // function prototypes. 1655 LinkDeclContextToDIE(m_ast.GetDeclContextForType(clang_type), die); 1656 type_sp = std::make_shared<Type>(die.GetID(), dwarf, attrs.name, 1657 attrs.byte_size, nullptr, LLDB_INVALID_UID, 1658 Type::eEncodingIsUID, &attrs.decl, 1659 clang_type, Type::ResolveState::Forward); 1660 1661 type_sp->SetIsCompleteObjCClass(attrs.is_complete_objc_class); 1662 1663 // Add our type to the unique type map so we don't end up creating many 1664 // copies of the same type over and over in the ASTContext for our 1665 // module 1666 unique_ast_entry_up->m_type_sp = type_sp; 1667 unique_ast_entry_up->m_die = die; 1668 unique_ast_entry_up->m_declaration = unique_decl; 1669 unique_ast_entry_up->m_byte_size = attrs.byte_size.getValueOr(0); 1670 dwarf->GetUniqueDWARFASTTypeMap().Insert(unique_typename, 1671 *unique_ast_entry_up); 1672 1673 if (attrs.is_forward_declaration && die.HasChildren()) { 1674 // Check to see if the DIE actually has a definition, some version of 1675 // GCC will 1676 // emit DIEs with DW_AT_declaration set to true, but yet still have 1677 // subprogram, members, or inheritance, so we can't trust it 1678 DWARFDIE child_die = die.GetFirstChild(); 1679 while (child_die) { 1680 switch (child_die.Tag()) { 1681 case DW_TAG_inheritance: 1682 case DW_TAG_subprogram: 1683 case DW_TAG_member: 1684 case DW_TAG_APPLE_property: 1685 case DW_TAG_class_type: 1686 case DW_TAG_structure_type: 1687 case DW_TAG_enumeration_type: 1688 case DW_TAG_typedef: 1689 case DW_TAG_union_type: 1690 child_die.Clear(); 1691 attrs.is_forward_declaration = false; 1692 break; 1693 default: 1694 child_die = child_die.GetSibling(); 1695 break; 1696 } 1697 } 1698 } 1699 1700 if (!attrs.is_forward_declaration) { 1701 // Always start the definition for a class type so that if the class 1702 // has child classes or types that require the class to be created 1703 // for use as their decl contexts the class will be ready to accept 1704 // these child definitions. 1705 if (!die.HasChildren()) { 1706 // No children for this struct/union/class, lets finish it 1707 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 1708 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 1709 } else { 1710 dwarf->GetObjectFile()->GetModule()->ReportError( 1711 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 1712 "definition.\nPlease file a bug and attach the file at the " 1713 "start of this error message", 1714 die.GetOffset(), attrs.name.GetCString()); 1715 } 1716 1717 if (tag == DW_TAG_structure_type) // this only applies in C 1718 { 1719 clang::RecordDecl *record_decl = 1720 ClangASTContext::GetAsRecordDecl(clang_type); 1721 1722 if (record_decl) { 1723 GetClangASTImporter().SetRecordLayout( 1724 record_decl, ClangASTImporter::LayoutInfo()); 1725 } 1726 } 1727 } else if (clang_type_was_created) { 1728 // Start the definition if the class is not objective C since the 1729 // underlying decls respond to isCompleteDefinition(). Objective 1730 // C decls don't respond to isCompleteDefinition() so we can't 1731 // start the declaration definition right away. For C++ 1732 // class/union/structs we want to start the definition in case the 1733 // class is needed as the declaration context for a contained class 1734 // or type without the need to complete that type.. 1735 1736 if (attrs.class_language != eLanguageTypeObjC && 1737 attrs.class_language != eLanguageTypeObjC_plus_plus) 1738 ClangASTContext::StartTagDeclarationDefinition(clang_type); 1739 1740 // Leave this as a forward declaration until we need to know the 1741 // details of the type. lldb_private::Type will automatically call 1742 // the SymbolFile virtual function 1743 // "SymbolFileDWARF::CompleteType(Type *)" When the definition 1744 // needs to be defined. 1745 assert(!dwarf->GetForwardDeclClangTypeToDie().count( 1746 ClangUtil::RemoveFastQualifiers(clang_type) 1747 .GetOpaqueQualType()) && 1748 "Type already in the forward declaration map!"); 1749 // Can't assume m_ast.GetSymbolFile() is actually a 1750 // SymbolFileDWARF, it can be a SymbolFileDWARFDebugMap for Apple 1751 // binaries. 1752 dwarf->GetForwardDeclDieToClangType()[die.GetDIE()] = 1753 clang_type.GetOpaqueQualType(); 1754 dwarf->GetForwardDeclClangTypeToDie() 1755 [ClangUtil::RemoveFastQualifiers(clang_type).GetOpaqueQualType()] = 1756 die.GetID(); 1757 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), true); 1758 } 1759 } 1760 1761 // If we made a clang type, set the trivial abi if applicable: We only 1762 // do this for pass by value - which implies the Trivial ABI. There 1763 // isn't a way to assert that something that would normally be pass by 1764 // value is pass by reference, so we ignore that attribute if set. 1765 if (attrs.calling_convention == llvm::dwarf::DW_CC_pass_by_value) { 1766 clang::CXXRecordDecl *record_decl = 1767 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 1768 if (record_decl && record_decl->getDefinition()) { 1769 record_decl->setHasTrivialSpecialMemberForCall(); 1770 } 1771 } 1772 1773 if (attrs.calling_convention == llvm::dwarf::DW_CC_pass_by_reference) { 1774 clang::CXXRecordDecl *record_decl = 1775 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 1776 if (record_decl) 1777 record_decl->setArgPassingRestrictions( 1778 clang::RecordDecl::APK_CannotPassInRegs); 1779 } 1780 return type_sp; 1781 } 1782 1783 // DWARF parsing functions 1784 1785 class DWARFASTParserClang::DelayedAddObjCClassProperty { 1786 public: 1787 DelayedAddObjCClassProperty( 1788 const CompilerType &class_opaque_type, const char *property_name, 1789 const CompilerType &property_opaque_type, // The property type is only 1790 // required if you don't have an 1791 // ivar decl 1792 clang::ObjCIvarDecl *ivar_decl, const char *property_setter_name, 1793 const char *property_getter_name, uint32_t property_attributes, 1794 const ClangASTMetadata *metadata) 1795 : m_class_opaque_type(class_opaque_type), m_property_name(property_name), 1796 m_property_opaque_type(property_opaque_type), m_ivar_decl(ivar_decl), 1797 m_property_setter_name(property_setter_name), 1798 m_property_getter_name(property_getter_name), 1799 m_property_attributes(property_attributes) { 1800 if (metadata != nullptr) { 1801 m_metadata_up.reset(new ClangASTMetadata()); 1802 *m_metadata_up = *metadata; 1803 } 1804 } 1805 1806 DelayedAddObjCClassProperty(const DelayedAddObjCClassProperty &rhs) { 1807 *this = rhs; 1808 } 1809 1810 DelayedAddObjCClassProperty & 1811 operator=(const DelayedAddObjCClassProperty &rhs) { 1812 m_class_opaque_type = rhs.m_class_opaque_type; 1813 m_property_name = rhs.m_property_name; 1814 m_property_opaque_type = rhs.m_property_opaque_type; 1815 m_ivar_decl = rhs.m_ivar_decl; 1816 m_property_setter_name = rhs.m_property_setter_name; 1817 m_property_getter_name = rhs.m_property_getter_name; 1818 m_property_attributes = rhs.m_property_attributes; 1819 1820 if (rhs.m_metadata_up) { 1821 m_metadata_up.reset(new ClangASTMetadata()); 1822 *m_metadata_up = *rhs.m_metadata_up; 1823 } 1824 return *this; 1825 } 1826 1827 bool Finalize() { 1828 return ClangASTContext::AddObjCClassProperty( 1829 m_class_opaque_type, m_property_name, m_property_opaque_type, 1830 m_ivar_decl, m_property_setter_name, m_property_getter_name, 1831 m_property_attributes, m_metadata_up.get()); 1832 } 1833 1834 private: 1835 CompilerType m_class_opaque_type; 1836 const char *m_property_name; 1837 CompilerType m_property_opaque_type; 1838 clang::ObjCIvarDecl *m_ivar_decl; 1839 const char *m_property_setter_name; 1840 const char *m_property_getter_name; 1841 uint32_t m_property_attributes; 1842 std::unique_ptr<ClangASTMetadata> m_metadata_up; 1843 }; 1844 1845 bool DWARFASTParserClang::ParseTemplateDIE( 1846 const DWARFDIE &die, 1847 ClangASTContext::TemplateParameterInfos &template_param_infos) { 1848 const dw_tag_t tag = die.Tag(); 1849 bool is_template_template_argument = false; 1850 1851 switch (tag) { 1852 case DW_TAG_GNU_template_parameter_pack: { 1853 template_param_infos.packed_args.reset( 1854 new ClangASTContext::TemplateParameterInfos); 1855 for (DWARFDIE child_die = die.GetFirstChild(); child_die.IsValid(); 1856 child_die = child_die.GetSibling()) { 1857 if (!ParseTemplateDIE(child_die, *template_param_infos.packed_args)) 1858 return false; 1859 } 1860 if (const char *name = die.GetName()) { 1861 template_param_infos.pack_name = name; 1862 } 1863 return true; 1864 } 1865 case DW_TAG_GNU_template_template_param: 1866 is_template_template_argument = true; 1867 LLVM_FALLTHROUGH; 1868 case DW_TAG_template_type_parameter: 1869 case DW_TAG_template_value_parameter: { 1870 DWARFAttributes attributes; 1871 const size_t num_attributes = die.GetAttributes(attributes); 1872 const char *name = nullptr; 1873 const char *template_name = nullptr; 1874 CompilerType clang_type; 1875 uint64_t uval64 = 0; 1876 bool uval64_valid = false; 1877 if (num_attributes > 0) { 1878 DWARFFormValue form_value; 1879 for (size_t i = 0; i < num_attributes; ++i) { 1880 const dw_attr_t attr = attributes.AttributeAtIndex(i); 1881 1882 switch (attr) { 1883 case DW_AT_name: 1884 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1885 name = form_value.AsCString(); 1886 break; 1887 1888 case DW_AT_GNU_template_name: 1889 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1890 template_name = form_value.AsCString(); 1891 break; 1892 1893 case DW_AT_type: 1894 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1895 Type *lldb_type = die.ResolveTypeUID(form_value.Reference()); 1896 if (lldb_type) 1897 clang_type = lldb_type->GetForwardCompilerType(); 1898 } 1899 break; 1900 1901 case DW_AT_const_value: 1902 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1903 uval64_valid = true; 1904 uval64 = form_value.Unsigned(); 1905 } 1906 break; 1907 default: 1908 break; 1909 } 1910 } 1911 1912 clang::ASTContext &ast = m_ast.getASTContext(); 1913 if (!clang_type) 1914 clang_type = m_ast.GetBasicType(eBasicTypeVoid); 1915 1916 if (!is_template_template_argument) { 1917 bool is_signed = false; 1918 if (name && name[0]) 1919 template_param_infos.names.push_back(name); 1920 else 1921 template_param_infos.names.push_back(NULL); 1922 1923 // Get the signed value for any integer or enumeration if available 1924 clang_type.IsIntegerOrEnumerationType(is_signed); 1925 1926 if (tag == DW_TAG_template_value_parameter && uval64_valid) { 1927 llvm::Optional<uint64_t> size = clang_type.GetBitSize(nullptr); 1928 if (!size) 1929 return false; 1930 llvm::APInt apint(*size, uval64, is_signed); 1931 template_param_infos.args.push_back( 1932 clang::TemplateArgument(ast, llvm::APSInt(apint, !is_signed), 1933 ClangUtil::GetQualType(clang_type))); 1934 } else { 1935 template_param_infos.args.push_back( 1936 clang::TemplateArgument(ClangUtil::GetQualType(clang_type))); 1937 } 1938 } else { 1939 auto *tplt_type = m_ast.CreateTemplateTemplateParmDecl(template_name); 1940 template_param_infos.names.push_back(name); 1941 template_param_infos.args.push_back( 1942 clang::TemplateArgument(clang::TemplateName(tplt_type))); 1943 } 1944 } 1945 } 1946 return true; 1947 1948 default: 1949 break; 1950 } 1951 return false; 1952 } 1953 1954 bool DWARFASTParserClang::ParseTemplateParameterInfos( 1955 const DWARFDIE &parent_die, 1956 ClangASTContext::TemplateParameterInfos &template_param_infos) { 1957 1958 if (!parent_die) 1959 return false; 1960 1961 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 1962 die = die.GetSibling()) { 1963 const dw_tag_t tag = die.Tag(); 1964 1965 switch (tag) { 1966 case DW_TAG_template_type_parameter: 1967 case DW_TAG_template_value_parameter: 1968 case DW_TAG_GNU_template_parameter_pack: 1969 case DW_TAG_GNU_template_template_param: 1970 ParseTemplateDIE(die, template_param_infos); 1971 break; 1972 1973 default: 1974 break; 1975 } 1976 } 1977 if (template_param_infos.args.empty()) 1978 return false; 1979 return template_param_infos.args.size() == template_param_infos.names.size(); 1980 } 1981 1982 bool DWARFASTParserClang::CompleteRecordType(const DWARFDIE &die, 1983 lldb_private::Type *type, 1984 CompilerType &clang_type) { 1985 const dw_tag_t tag = die.Tag(); 1986 SymbolFileDWARF *dwarf = die.GetDWARF(); 1987 1988 ClangASTImporter::LayoutInfo layout_info; 1989 1990 { 1991 if (die.HasChildren()) { 1992 LanguageType class_language = eLanguageTypeUnknown; 1993 if (ClangASTContext::IsObjCObjectOrInterfaceType(clang_type)) { 1994 class_language = eLanguageTypeObjC; 1995 // For objective C we don't start the definition when the class is 1996 // created. 1997 ClangASTContext::StartTagDeclarationDefinition(clang_type); 1998 } 1999 2000 int tag_decl_kind = -1; 2001 AccessType default_accessibility = eAccessNone; 2002 if (tag == DW_TAG_structure_type) { 2003 tag_decl_kind = clang::TTK_Struct; 2004 default_accessibility = eAccessPublic; 2005 } else if (tag == DW_TAG_union_type) { 2006 tag_decl_kind = clang::TTK_Union; 2007 default_accessibility = eAccessPublic; 2008 } else if (tag == DW_TAG_class_type) { 2009 tag_decl_kind = clang::TTK_Class; 2010 default_accessibility = eAccessPrivate; 2011 } 2012 2013 std::vector<std::unique_ptr<clang::CXXBaseSpecifier>> bases; 2014 std::vector<int> member_accessibilities; 2015 bool is_a_class = false; 2016 // Parse members and base classes first 2017 std::vector<DWARFDIE> member_function_dies; 2018 2019 DelayedPropertyList delayed_properties; 2020 ParseChildMembers(die, clang_type, class_language, bases, 2021 member_accessibilities, member_function_dies, 2022 delayed_properties, default_accessibility, is_a_class, 2023 layout_info); 2024 2025 // Now parse any methods if there were any... 2026 for (const DWARFDIE &die : member_function_dies) 2027 dwarf->ResolveType(die); 2028 2029 if (class_language == eLanguageTypeObjC) { 2030 ConstString class_name(clang_type.GetTypeName()); 2031 if (class_name) { 2032 DIEArray method_die_offsets; 2033 dwarf->GetObjCMethodDIEOffsets(class_name, method_die_offsets); 2034 2035 if (!method_die_offsets.empty()) { 2036 DWARFDebugInfo *debug_info = dwarf->DebugInfo(); 2037 2038 const size_t num_matches = method_die_offsets.size(); 2039 for (size_t i = 0; i < num_matches; ++i) { 2040 const DIERef &die_ref = method_die_offsets[i]; 2041 DWARFDIE method_die = debug_info->GetDIE(die_ref); 2042 2043 if (method_die) 2044 method_die.ResolveType(); 2045 } 2046 } 2047 2048 for (DelayedPropertyList::iterator pi = delayed_properties.begin(), 2049 pe = delayed_properties.end(); 2050 pi != pe; ++pi) 2051 pi->Finalize(); 2052 } 2053 } 2054 2055 // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we 2056 // need to tell the clang type it is actually a class. 2057 if (class_language != eLanguageTypeObjC) { 2058 if (is_a_class && tag_decl_kind != clang::TTK_Class) 2059 m_ast.SetTagTypeKind(ClangUtil::GetQualType(clang_type), 2060 clang::TTK_Class); 2061 } 2062 2063 // Since DW_TAG_structure_type gets used for both classes and 2064 // structures, we may need to set any DW_TAG_member fields to have a 2065 // "private" access if none was specified. When we parsed the child 2066 // members we tracked that actual accessibility value for each 2067 // DW_TAG_member in the "member_accessibilities" array. If the value 2068 // for the member is zero, then it was set to the 2069 // "default_accessibility" which for structs was "public". Below we 2070 // correct this by setting any fields to "private" that weren't 2071 // correctly set. 2072 if (is_a_class && !member_accessibilities.empty()) { 2073 // This is a class and all members that didn't have their access 2074 // specified are private. 2075 m_ast.SetDefaultAccessForRecordFields( 2076 m_ast.GetAsRecordDecl(clang_type), eAccessPrivate, 2077 &member_accessibilities.front(), member_accessibilities.size()); 2078 } 2079 2080 if (!bases.empty()) { 2081 // Make sure all base classes refer to complete types and not forward 2082 // declarations. If we don't do this, clang will crash with an 2083 // assertion in the call to clang_type.TransferBaseClasses() 2084 for (const auto &base_class : bases) { 2085 clang::TypeSourceInfo *type_source_info = 2086 base_class->getTypeSourceInfo(); 2087 if (type_source_info) { 2088 CompilerType base_class_type( 2089 &m_ast, type_source_info->getType().getAsOpaquePtr()); 2090 if (!base_class_type.GetCompleteType()) { 2091 auto module = dwarf->GetObjectFile()->GetModule(); 2092 module->ReportError(":: Class '%s' has a base class '%s' which " 2093 "does not have a complete definition.", 2094 die.GetName(), 2095 base_class_type.GetTypeName().GetCString()); 2096 if (die.GetCU()->GetProducer() == eProducerClang) 2097 module->ReportError(":: Try compiling the source file with " 2098 "-fstandalone-debug."); 2099 2100 // We have no choice other than to pretend that the base class 2101 // is complete. If we don't do this, clang will crash when we 2102 // call setBases() inside of 2103 // "clang_type.TransferBaseClasses()" below. Since we 2104 // provide layout assistance, all ivars in this class and other 2105 // classes will be fine, this is the best we can do short of 2106 // crashing. 2107 if (ClangASTContext::StartTagDeclarationDefinition( 2108 base_class_type)) { 2109 ClangASTContext::CompleteTagDeclarationDefinition( 2110 base_class_type); 2111 } 2112 } 2113 } 2114 } 2115 2116 m_ast.TransferBaseClasses(clang_type.GetOpaqueQualType(), 2117 std::move(bases)); 2118 } 2119 } 2120 } 2121 2122 m_ast.AddMethodOverridesForCXXRecordType(clang_type.GetOpaqueQualType()); 2123 ClangASTContext::BuildIndirectFields(clang_type); 2124 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 2125 2126 if (!layout_info.field_offsets.empty() || !layout_info.base_offsets.empty() || 2127 !layout_info.vbase_offsets.empty()) { 2128 if (type) 2129 layout_info.bit_size = type->GetByteSize().getValueOr(0) * 8; 2130 if (layout_info.bit_size == 0) 2131 layout_info.bit_size = 2132 die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 0) * 8; 2133 2134 clang::CXXRecordDecl *record_decl = 2135 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 2136 if (record_decl) 2137 GetClangASTImporter().SetRecordLayout(record_decl, layout_info); 2138 } 2139 2140 return (bool)clang_type; 2141 } 2142 2143 bool DWARFASTParserClang::CompleteEnumType(const DWARFDIE &die, 2144 lldb_private::Type *type, 2145 CompilerType &clang_type) { 2146 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 2147 if (die.HasChildren()) { 2148 bool is_signed = false; 2149 clang_type.IsIntegerType(is_signed); 2150 ParseChildEnumerators(clang_type, is_signed, 2151 type->GetByteSize().getValueOr(0), die); 2152 } 2153 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 2154 } 2155 return (bool)clang_type; 2156 } 2157 2158 bool DWARFASTParserClang::CompleteTypeFromDWARF(const DWARFDIE &die, 2159 lldb_private::Type *type, 2160 CompilerType &clang_type) { 2161 SymbolFileDWARF *dwarf = die.GetDWARF(); 2162 2163 std::lock_guard<std::recursive_mutex> guard( 2164 dwarf->GetObjectFile()->GetModule()->GetMutex()); 2165 2166 // Disable external storage for this type so we don't get anymore 2167 // clang::ExternalASTSource queries for this type. 2168 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), false); 2169 2170 if (!die) 2171 return false; 2172 2173 const dw_tag_t tag = die.Tag(); 2174 2175 Log *log = 2176 nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION)); 2177 if (log) 2178 dwarf->GetObjectFile()->GetModule()->LogMessageVerboseBacktrace( 2179 log, "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...", 2180 die.GetID(), die.GetTagAsCString(), type->GetName().AsCString()); 2181 assert(clang_type); 2182 DWARFAttributes attributes; 2183 switch (tag) { 2184 case DW_TAG_structure_type: 2185 case DW_TAG_union_type: 2186 case DW_TAG_class_type: 2187 return CompleteRecordType(die, type, clang_type); 2188 case DW_TAG_enumeration_type: 2189 return CompleteEnumType(die, type, clang_type); 2190 default: 2191 assert(false && "not a forward clang type decl!"); 2192 break; 2193 } 2194 2195 return false; 2196 } 2197 2198 void DWARFASTParserClang::EnsureAllDIEsInDeclContextHaveBeenParsed( 2199 lldb_private::CompilerDeclContext decl_context) { 2200 auto opaque_decl_ctx = 2201 (clang::DeclContext *)decl_context.GetOpaqueDeclContext(); 2202 for (auto it = m_decl_ctx_to_die.find(opaque_decl_ctx); 2203 it != m_decl_ctx_to_die.end() && it->first == opaque_decl_ctx; 2204 it = m_decl_ctx_to_die.erase(it)) 2205 for (DWARFDIE decl = it->second.GetFirstChild(); decl; 2206 decl = decl.GetSibling()) 2207 GetClangDeclForDIE(decl); 2208 } 2209 2210 CompilerDecl DWARFASTParserClang::GetDeclForUIDFromDWARF(const DWARFDIE &die) { 2211 clang::Decl *clang_decl = GetClangDeclForDIE(die); 2212 if (clang_decl != nullptr) 2213 return CompilerDecl(&m_ast, clang_decl); 2214 return CompilerDecl(); 2215 } 2216 2217 CompilerDeclContext 2218 DWARFASTParserClang::GetDeclContextForUIDFromDWARF(const DWARFDIE &die) { 2219 clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE(die); 2220 if (clang_decl_ctx) 2221 return m_ast.CreateDeclContext(clang_decl_ctx); 2222 return CompilerDeclContext(); 2223 } 2224 2225 CompilerDeclContext 2226 DWARFASTParserClang::GetDeclContextContainingUIDFromDWARF(const DWARFDIE &die) { 2227 clang::DeclContext *clang_decl_ctx = 2228 GetClangDeclContextContainingDIE(die, nullptr); 2229 if (clang_decl_ctx) 2230 return m_ast.CreateDeclContext(clang_decl_ctx); 2231 return CompilerDeclContext(); 2232 } 2233 2234 size_t DWARFASTParserClang::ParseChildEnumerators( 2235 lldb_private::CompilerType &clang_type, bool is_signed, 2236 uint32_t enumerator_byte_size, const DWARFDIE &parent_die) { 2237 if (!parent_die) 2238 return 0; 2239 2240 size_t enumerators_added = 0; 2241 2242 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2243 die = die.GetSibling()) { 2244 const dw_tag_t tag = die.Tag(); 2245 if (tag == DW_TAG_enumerator) { 2246 DWARFAttributes attributes; 2247 const size_t num_child_attributes = die.GetAttributes(attributes); 2248 if (num_child_attributes > 0) { 2249 const char *name = nullptr; 2250 bool got_value = false; 2251 int64_t enum_value = 0; 2252 Declaration decl; 2253 2254 uint32_t i; 2255 for (i = 0; i < num_child_attributes; ++i) { 2256 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2257 DWARFFormValue form_value; 2258 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2259 switch (attr) { 2260 case DW_AT_const_value: 2261 got_value = true; 2262 if (is_signed) 2263 enum_value = form_value.Signed(); 2264 else 2265 enum_value = form_value.Unsigned(); 2266 break; 2267 2268 case DW_AT_name: 2269 name = form_value.AsCString(); 2270 break; 2271 2272 case DW_AT_description: 2273 default: 2274 case DW_AT_decl_file: 2275 decl.SetFile(die.GetCU()->GetFile(form_value.Unsigned())); 2276 break; 2277 case DW_AT_decl_line: 2278 decl.SetLine(form_value.Unsigned()); 2279 break; 2280 case DW_AT_decl_column: 2281 decl.SetColumn(form_value.Unsigned()); 2282 break; 2283 case DW_AT_sibling: 2284 break; 2285 } 2286 } 2287 } 2288 2289 if (name && name[0] && got_value) { 2290 m_ast.AddEnumerationValueToEnumerationType( 2291 clang_type, decl, name, enum_value, enumerator_byte_size * 8); 2292 ++enumerators_added; 2293 } 2294 } 2295 } 2296 } 2297 return enumerators_added; 2298 } 2299 2300 #if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE) 2301 2302 class DIEStack { 2303 public: 2304 void Push(const DWARFDIE &die) { m_dies.push_back(die); } 2305 2306 void LogDIEs(Log *log) { 2307 StreamString log_strm; 2308 const size_t n = m_dies.size(); 2309 log_strm.Printf("DIEStack[%" PRIu64 "]:\n", (uint64_t)n); 2310 for (size_t i = 0; i < n; i++) { 2311 std::string qualified_name; 2312 const DWARFDIE &die = m_dies[i]; 2313 die.GetQualifiedName(qualified_name); 2314 log_strm.Printf("[%" PRIu64 "] 0x%8.8x: %s name='%s'\n", (uint64_t)i, 2315 die.GetOffset(), die.GetTagAsCString(), 2316 qualified_name.c_str()); 2317 } 2318 log->PutCString(log_strm.GetData()); 2319 } 2320 void Pop() { m_dies.pop_back(); } 2321 2322 class ScopedPopper { 2323 public: 2324 ScopedPopper(DIEStack &die_stack) 2325 : m_die_stack(die_stack), m_valid(false) {} 2326 2327 void Push(const DWARFDIE &die) { 2328 m_valid = true; 2329 m_die_stack.Push(die); 2330 } 2331 2332 ~ScopedPopper() { 2333 if (m_valid) 2334 m_die_stack.Pop(); 2335 } 2336 2337 protected: 2338 DIEStack &m_die_stack; 2339 bool m_valid; 2340 }; 2341 2342 protected: 2343 typedef std::vector<DWARFDIE> Stack; 2344 Stack m_dies; 2345 }; 2346 #endif 2347 2348 Function *DWARFASTParserClang::ParseFunctionFromDWARF(CompileUnit &comp_unit, 2349 const DWARFDIE &die) { 2350 DWARFRangeList func_ranges; 2351 const char *name = nullptr; 2352 const char *mangled = nullptr; 2353 int decl_file = 0; 2354 int decl_line = 0; 2355 int decl_column = 0; 2356 int call_file = 0; 2357 int call_line = 0; 2358 int call_column = 0; 2359 DWARFExpression frame_base; 2360 2361 const dw_tag_t tag = die.Tag(); 2362 2363 if (tag != DW_TAG_subprogram) 2364 return nullptr; 2365 2366 if (die.GetDIENamesAndRanges(name, mangled, func_ranges, decl_file, decl_line, 2367 decl_column, call_file, call_line, call_column, 2368 &frame_base)) { 2369 2370 // Union of all ranges in the function DIE (if the function is 2371 // discontiguous) 2372 AddressRange func_range; 2373 lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase(0); 2374 lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd(0); 2375 if (lowest_func_addr != LLDB_INVALID_ADDRESS && 2376 lowest_func_addr <= highest_func_addr) { 2377 ModuleSP module_sp(die.GetModule()); 2378 func_range.GetBaseAddress().ResolveAddressUsingFileSections( 2379 lowest_func_addr, module_sp->GetSectionList()); 2380 if (func_range.GetBaseAddress().IsValid()) 2381 func_range.SetByteSize(highest_func_addr - lowest_func_addr); 2382 } 2383 2384 if (func_range.GetBaseAddress().IsValid()) { 2385 Mangled func_name; 2386 if (mangled) 2387 func_name.SetValue(ConstString(mangled), true); 2388 else if ((die.GetParent().Tag() == DW_TAG_compile_unit || 2389 die.GetParent().Tag() == DW_TAG_partial_unit) && 2390 Language::LanguageIsCPlusPlus(die.GetLanguage()) && 2391 !Language::LanguageIsObjC(die.GetLanguage()) && name && 2392 strcmp(name, "main") != 0) { 2393 // If the mangled name is not present in the DWARF, generate the 2394 // demangled name using the decl context. We skip if the function is 2395 // "main" as its name is never mangled. 2396 bool is_static = false; 2397 bool is_variadic = false; 2398 bool has_template_params = false; 2399 unsigned type_quals = 0; 2400 std::vector<CompilerType> param_types; 2401 std::vector<clang::ParmVarDecl *> param_decls; 2402 DWARFDeclContext decl_ctx; 2403 StreamString sstr; 2404 2405 die.GetDWARFDeclContext(decl_ctx); 2406 sstr << decl_ctx.GetQualifiedName(); 2407 2408 clang::DeclContext *containing_decl_ctx = 2409 GetClangDeclContextContainingDIE(die, nullptr); 2410 ParseChildParameters(containing_decl_ctx, die, true, is_static, 2411 is_variadic, has_template_params, param_types, 2412 param_decls, type_quals); 2413 sstr << "("; 2414 for (size_t i = 0; i < param_types.size(); i++) { 2415 if (i > 0) 2416 sstr << ", "; 2417 sstr << param_types[i].GetTypeName(); 2418 } 2419 if (is_variadic) 2420 sstr << ", ..."; 2421 sstr << ")"; 2422 if (type_quals & clang::Qualifiers::Const) 2423 sstr << " const"; 2424 2425 func_name.SetValue(ConstString(sstr.GetString()), false); 2426 } else 2427 func_name.SetValue(ConstString(name), false); 2428 2429 FunctionSP func_sp; 2430 std::unique_ptr<Declaration> decl_up; 2431 if (decl_file != 0 || decl_line != 0 || decl_column != 0) 2432 decl_up.reset(new Declaration(die.GetCU()->GetFile(decl_file), 2433 decl_line, decl_column)); 2434 2435 SymbolFileDWARF *dwarf = die.GetDWARF(); 2436 // Supply the type _only_ if it has already been parsed 2437 Type *func_type = dwarf->GetDIEToType().lookup(die.GetDIE()); 2438 2439 assert(func_type == nullptr || func_type != DIE_IS_BEING_PARSED); 2440 2441 if (dwarf->FixupAddress(func_range.GetBaseAddress())) { 2442 const user_id_t func_user_id = die.GetID(); 2443 func_sp = 2444 std::make_shared<Function>(&comp_unit, 2445 func_user_id, // UserID is the DIE offset 2446 func_user_id, func_name, func_type, 2447 func_range); // first address range 2448 2449 if (func_sp.get() != nullptr) { 2450 if (frame_base.IsValid()) 2451 func_sp->GetFrameBaseExpression() = frame_base; 2452 comp_unit.AddFunction(func_sp); 2453 return func_sp.get(); 2454 } 2455 } 2456 } 2457 } 2458 return nullptr; 2459 } 2460 2461 void DWARFASTParserClang::ParseSingleMember( 2462 const DWARFDIE &die, const DWARFDIE &parent_die, 2463 lldb_private::CompilerType &class_clang_type, 2464 const lldb::LanguageType class_language, 2465 std::vector<int> &member_accessibilities, 2466 lldb::AccessType &default_accessibility, 2467 DelayedPropertyList &delayed_properties, 2468 lldb_private::ClangASTImporter::LayoutInfo &layout_info, 2469 BitfieldInfo &last_field_info) { 2470 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule(); 2471 const dw_tag_t tag = die.Tag(); 2472 // Get the parent byte size so we can verify any members will fit 2473 const uint64_t parent_byte_size = 2474 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, UINT64_MAX); 2475 const uint64_t parent_bit_size = 2476 parent_byte_size == UINT64_MAX ? UINT64_MAX : parent_byte_size * 8; 2477 2478 DWARFAttributes attributes; 2479 const size_t num_attributes = die.GetAttributes(attributes); 2480 if (num_attributes > 0) { 2481 const char *name = nullptr; 2482 const char *prop_name = nullptr; 2483 const char *prop_getter_name = nullptr; 2484 const char *prop_setter_name = nullptr; 2485 uint32_t prop_attributes = 0; 2486 2487 bool is_artificial = false; 2488 DWARFFormValue encoding_form; 2489 AccessType accessibility = eAccessNone; 2490 uint32_t member_byte_offset = 2491 (parent_die.Tag() == DW_TAG_union_type) ? 0 : UINT32_MAX; 2492 llvm::Optional<uint64_t> byte_size; 2493 int64_t bit_offset = 0; 2494 uint64_t data_bit_offset = UINT64_MAX; 2495 size_t bit_size = 0; 2496 bool is_external = 2497 false; // On DW_TAG_members, this means the member is static 2498 uint32_t i; 2499 for (i = 0; i < num_attributes && !is_artificial; ++i) { 2500 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2501 DWARFFormValue form_value; 2502 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2503 switch (attr) { 2504 case DW_AT_name: 2505 name = form_value.AsCString(); 2506 break; 2507 case DW_AT_type: 2508 encoding_form = form_value; 2509 break; 2510 case DW_AT_bit_offset: 2511 bit_offset = form_value.Signed(); 2512 break; 2513 case DW_AT_bit_size: 2514 bit_size = form_value.Unsigned(); 2515 break; 2516 case DW_AT_byte_size: 2517 byte_size = form_value.Unsigned(); 2518 break; 2519 case DW_AT_data_bit_offset: 2520 data_bit_offset = form_value.Unsigned(); 2521 break; 2522 case DW_AT_data_member_location: 2523 if (form_value.BlockData()) { 2524 Value initialValue(0); 2525 Value memberOffset(0); 2526 const DWARFDataExtractor &debug_info_data = die.GetData(); 2527 uint32_t block_length = form_value.Unsigned(); 2528 uint32_t block_offset = 2529 form_value.BlockData() - debug_info_data.GetDataStart(); 2530 if (DWARFExpression::Evaluate( 2531 nullptr, // ExecutionContext * 2532 nullptr, // RegisterContext * 2533 module_sp, 2534 DataExtractor(debug_info_data, block_offset, block_length), 2535 die.GetCU(), eRegisterKindDWARF, &initialValue, nullptr, 2536 memberOffset, nullptr)) { 2537 member_byte_offset = memberOffset.ResolveValue(nullptr).UInt(); 2538 } 2539 } else { 2540 // With DWARF 3 and later, if the value is an integer constant, 2541 // this form value is the offset in bytes from the beginning of 2542 // the containing entity. 2543 member_byte_offset = form_value.Unsigned(); 2544 } 2545 break; 2546 2547 case DW_AT_accessibility: 2548 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 2549 break; 2550 case DW_AT_artificial: 2551 is_artificial = form_value.Boolean(); 2552 break; 2553 case DW_AT_APPLE_property_name: 2554 prop_name = form_value.AsCString(); 2555 break; 2556 case DW_AT_APPLE_property_getter: 2557 prop_getter_name = form_value.AsCString(); 2558 break; 2559 case DW_AT_APPLE_property_setter: 2560 prop_setter_name = form_value.AsCString(); 2561 break; 2562 case DW_AT_APPLE_property_attribute: 2563 prop_attributes = form_value.Unsigned(); 2564 break; 2565 case DW_AT_external: 2566 is_external = form_value.Boolean(); 2567 break; 2568 2569 default: 2570 case DW_AT_declaration: 2571 case DW_AT_description: 2572 case DW_AT_mutable: 2573 case DW_AT_visibility: 2574 case DW_AT_sibling: 2575 break; 2576 } 2577 } 2578 } 2579 2580 if (prop_name) { 2581 ConstString fixed_getter; 2582 ConstString fixed_setter; 2583 2584 // Check if the property getter/setter were provided as full names. 2585 // We want basenames, so we extract them. 2586 2587 if (prop_getter_name && prop_getter_name[0] == '-') { 2588 ObjCLanguage::MethodName prop_getter_method(prop_getter_name, true); 2589 prop_getter_name = prop_getter_method.GetSelector().GetCString(); 2590 } 2591 2592 if (prop_setter_name && prop_setter_name[0] == '-') { 2593 ObjCLanguage::MethodName prop_setter_method(prop_setter_name, true); 2594 prop_setter_name = prop_setter_method.GetSelector().GetCString(); 2595 } 2596 2597 // If the names haven't been provided, they need to be filled in. 2598 2599 if (!prop_getter_name) { 2600 prop_getter_name = prop_name; 2601 } 2602 if (!prop_setter_name && prop_name[0] && 2603 !(prop_attributes & DW_APPLE_PROPERTY_readonly)) { 2604 StreamString ss; 2605 2606 ss.Printf("set%c%s:", toupper(prop_name[0]), &prop_name[1]); 2607 2608 fixed_setter.SetString(ss.GetString()); 2609 prop_setter_name = fixed_setter.GetCString(); 2610 } 2611 } 2612 2613 // Clang has a DWARF generation bug where sometimes it represents 2614 // fields that are references with bad byte size and bit size/offset 2615 // information such as: 2616 // 2617 // DW_AT_byte_size( 0x00 ) 2618 // DW_AT_bit_size( 0x40 ) 2619 // DW_AT_bit_offset( 0xffffffffffffffc0 ) 2620 // 2621 // So check the bit offset to make sure it is sane, and if the values 2622 // are not sane, remove them. If we don't do this then we will end up 2623 // with a crash if we try to use this type in an expression when clang 2624 // becomes unhappy with its recycled debug info. 2625 2626 if (byte_size.getValueOr(0) == 0 && bit_offset < 0) { 2627 bit_size = 0; 2628 bit_offset = 0; 2629 } 2630 2631 // FIXME: Make Clang ignore Objective-C accessibility for expressions 2632 if (class_language == eLanguageTypeObjC || 2633 class_language == eLanguageTypeObjC_plus_plus) 2634 accessibility = eAccessNone; 2635 2636 // Handle static members 2637 if (is_external && member_byte_offset == UINT32_MAX) { 2638 Type *var_type = die.ResolveTypeUID(encoding_form.Reference()); 2639 2640 if (var_type) { 2641 if (accessibility == eAccessNone) 2642 accessibility = eAccessPublic; 2643 ClangASTContext::AddVariableToRecordType( 2644 class_clang_type, name, var_type->GetLayoutCompilerType(), 2645 accessibility); 2646 } 2647 return; 2648 } 2649 2650 if (!is_artificial) { 2651 Type *member_type = die.ResolveTypeUID(encoding_form.Reference()); 2652 2653 clang::FieldDecl *field_decl = nullptr; 2654 if (tag == DW_TAG_member) { 2655 if (member_type) { 2656 if (accessibility == eAccessNone) 2657 accessibility = default_accessibility; 2658 member_accessibilities.push_back(accessibility); 2659 2660 uint64_t field_bit_offset = 2661 (member_byte_offset == UINT32_MAX ? 0 : (member_byte_offset * 8)); 2662 if (bit_size > 0) { 2663 2664 BitfieldInfo this_field_info; 2665 this_field_info.bit_offset = field_bit_offset; 2666 this_field_info.bit_size = bit_size; 2667 2668 ///////////////////////////////////////////////////////////// 2669 // How to locate a field given the DWARF debug information 2670 // 2671 // AT_byte_size indicates the size of the word in which the bit 2672 // offset must be interpreted. 2673 // 2674 // AT_data_member_location indicates the byte offset of the 2675 // word from the base address of the structure. 2676 // 2677 // AT_bit_offset indicates how many bits into the word 2678 // (according to the host endianness) the low-order bit of the 2679 // field starts. AT_bit_offset can be negative. 2680 // 2681 // AT_bit_size indicates the size of the field in bits. 2682 ///////////////////////////////////////////////////////////// 2683 2684 if (data_bit_offset != UINT64_MAX) { 2685 this_field_info.bit_offset = data_bit_offset; 2686 } else { 2687 if (!byte_size) 2688 byte_size = member_type->GetByteSize(); 2689 2690 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 2691 if (objfile->GetByteOrder() == eByteOrderLittle) { 2692 this_field_info.bit_offset += byte_size.getValueOr(0) * 8; 2693 this_field_info.bit_offset -= (bit_offset + bit_size); 2694 } else { 2695 this_field_info.bit_offset += bit_offset; 2696 } 2697 } 2698 2699 if ((this_field_info.bit_offset >= parent_bit_size) || 2700 !last_field_info.NextBitfieldOffsetIsValid( 2701 this_field_info.bit_offset)) { 2702 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 2703 objfile->GetModule()->ReportWarning( 2704 "0x%8.8" PRIx64 ": %s bitfield named \"%s\" has invalid " 2705 "bit offset (0x%8.8" PRIx64 2706 ") member will be ignored. Please file a bug against the " 2707 "compiler and include the preprocessed output for %s\n", 2708 die.GetID(), DW_TAG_value_to_name(tag), name, 2709 this_field_info.bit_offset, GetUnitName(parent_die).c_str()); 2710 this_field_info.Clear(); 2711 return; 2712 } 2713 2714 // Update the field bit offset we will report for layout 2715 field_bit_offset = this_field_info.bit_offset; 2716 2717 // If the member to be emitted did not start on a character 2718 // boundary and there is empty space between the last field and 2719 // this one, then we need to emit an anonymous member filling 2720 // up the space up to its start. There are three cases here: 2721 // 2722 // 1 If the previous member ended on a character boundary, then 2723 // we can emit an 2724 // anonymous member starting at the most recent character 2725 // boundary. 2726 // 2727 // 2 If the previous member did not end on a character boundary 2728 // and the distance 2729 // from the end of the previous member to the current member 2730 // is less than a 2731 // word width, then we can emit an anonymous member starting 2732 // right after the 2733 // previous member and right before this member. 2734 // 2735 // 3 If the previous member did not end on a character boundary 2736 // and the distance 2737 // from the end of the previous member to the current member 2738 // is greater than 2739 // or equal a word width, then we act as in Case 1. 2740 2741 const uint64_t character_width = 8; 2742 const uint64_t word_width = 32; 2743 2744 // Objective-C has invalid DW_AT_bit_offset values in older 2745 // versions of clang, so we have to be careful and only insert 2746 // unnamed bitfields if we have a new enough clang. 2747 bool detect_unnamed_bitfields = true; 2748 2749 if (class_language == eLanguageTypeObjC || 2750 class_language == eLanguageTypeObjC_plus_plus) 2751 detect_unnamed_bitfields = 2752 die.GetCU()->Supports_unnamed_objc_bitfields(); 2753 2754 if (detect_unnamed_bitfields) { 2755 BitfieldInfo anon_field_info; 2756 2757 if ((this_field_info.bit_offset % character_width) != 2758 0) // not char aligned 2759 { 2760 uint64_t last_field_end = 0; 2761 2762 if (last_field_info.IsValid()) 2763 last_field_end = 2764 last_field_info.bit_offset + last_field_info.bit_size; 2765 2766 if (this_field_info.bit_offset != last_field_end) { 2767 if (((last_field_end % character_width) == 0) || // case 1 2768 (this_field_info.bit_offset - last_field_end >= 2769 word_width)) // case 3 2770 { 2771 anon_field_info.bit_size = 2772 this_field_info.bit_offset % character_width; 2773 anon_field_info.bit_offset = 2774 this_field_info.bit_offset - anon_field_info.bit_size; 2775 } else // case 2 2776 { 2777 anon_field_info.bit_size = 2778 this_field_info.bit_offset - last_field_end; 2779 anon_field_info.bit_offset = last_field_end; 2780 } 2781 } 2782 } 2783 2784 if (anon_field_info.IsValid()) { 2785 clang::FieldDecl *unnamed_bitfield_decl = 2786 ClangASTContext::AddFieldToRecordType( 2787 class_clang_type, llvm::StringRef(), 2788 m_ast.GetBuiltinTypeForEncodingAndBitSize(eEncodingSint, 2789 word_width), 2790 accessibility, anon_field_info.bit_size); 2791 2792 layout_info.field_offsets.insert(std::make_pair( 2793 unnamed_bitfield_decl, anon_field_info.bit_offset)); 2794 } 2795 } 2796 last_field_info = this_field_info; 2797 } else { 2798 last_field_info.Clear(); 2799 } 2800 2801 CompilerType member_clang_type = member_type->GetLayoutCompilerType(); 2802 if (!member_clang_type.IsCompleteType()) 2803 member_clang_type.GetCompleteType(); 2804 2805 { 2806 // Older versions of clang emit array[0] and array[1] in the 2807 // same way (<rdar://problem/12566646>). If the current field 2808 // is at the end of the structure, then there is definitely no 2809 // room for extra elements and we override the type to 2810 // array[0]. 2811 2812 CompilerType member_array_element_type; 2813 uint64_t member_array_size; 2814 bool member_array_is_incomplete; 2815 2816 if (member_clang_type.IsArrayType(&member_array_element_type, 2817 &member_array_size, 2818 &member_array_is_incomplete) && 2819 !member_array_is_incomplete) { 2820 uint64_t parent_byte_size = 2821 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 2822 UINT64_MAX); 2823 2824 if (member_byte_offset >= parent_byte_size) { 2825 if (member_array_size != 1 && 2826 (member_array_size != 0 || 2827 member_byte_offset > parent_byte_size)) { 2828 module_sp->ReportError( 2829 "0x%8.8" PRIx64 2830 ": DW_TAG_member '%s' refers to type 0x%8.8x" 2831 " which extends beyond the bounds of 0x%8.8" PRIx64, 2832 die.GetID(), name, encoding_form.Reference().GetOffset(), 2833 parent_die.GetID()); 2834 } 2835 2836 member_clang_type = 2837 m_ast.CreateArrayType(member_array_element_type, 0, false); 2838 } 2839 } 2840 } 2841 2842 if (ClangASTContext::IsCXXClassType(member_clang_type) && 2843 !member_clang_type.GetCompleteType()) { 2844 if (die.GetCU()->GetProducer() == eProducerClang) 2845 module_sp->ReportError( 2846 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 2847 "0x%8.8x (%s) whose type is a forward declaration, not a " 2848 "complete definition.\nTry compiling the source file " 2849 "with -fstandalone-debug", 2850 parent_die.GetOffset(), parent_die.GetName(), die.GetOffset(), 2851 name); 2852 else 2853 module_sp->ReportError( 2854 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 2855 "0x%8.8x (%s) whose type is a forward declaration, not a " 2856 "complete definition.\nPlease file a bug against the " 2857 "compiler and include the preprocessed output for %s", 2858 parent_die.GetOffset(), parent_die.GetName(), die.GetOffset(), 2859 name, GetUnitName(parent_die).c_str()); 2860 // We have no choice other than to pretend that the member 2861 // class is complete. If we don't do this, clang will crash 2862 // when trying to layout the class. Since we provide layout 2863 // assistance, all ivars in this class and other classes will 2864 // be fine, this is the best we can do short of crashing. 2865 if (ClangASTContext::StartTagDeclarationDefinition( 2866 member_clang_type)) { 2867 ClangASTContext::CompleteTagDeclarationDefinition( 2868 member_clang_type); 2869 } else { 2870 module_sp->ReportError( 2871 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 2872 "0x%8.8x (%s) whose type claims to be a C++ class but we " 2873 "were not able to start its definition.\nPlease file a " 2874 "bug and attach the file at the start of this error " 2875 "message", 2876 parent_die.GetOffset(), parent_die.GetName(), die.GetOffset(), 2877 name); 2878 } 2879 } 2880 2881 field_decl = ClangASTContext::AddFieldToRecordType( 2882 class_clang_type, name, member_clang_type, accessibility, 2883 bit_size); 2884 2885 m_ast.SetMetadataAsUserID(field_decl, die.GetID()); 2886 2887 layout_info.field_offsets.insert( 2888 std::make_pair(field_decl, field_bit_offset)); 2889 } else { 2890 if (name) 2891 module_sp->ReportError( 2892 "0x%8.8" PRIx64 ": DW_TAG_member '%s' refers to type 0x%8.8x" 2893 " which was unable to be parsed", 2894 die.GetID(), name, encoding_form.Reference().GetOffset()); 2895 else 2896 module_sp->ReportError( 2897 "0x%8.8" PRIx64 ": DW_TAG_member refers to type 0x%8.8x" 2898 " which was unable to be parsed", 2899 die.GetID(), encoding_form.Reference().GetOffset()); 2900 } 2901 } 2902 2903 if (prop_name != nullptr && member_type) { 2904 clang::ObjCIvarDecl *ivar_decl = nullptr; 2905 2906 if (field_decl) { 2907 ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl); 2908 assert(ivar_decl != nullptr); 2909 } 2910 2911 ClangASTMetadata metadata; 2912 metadata.SetUserID(die.GetID()); 2913 delayed_properties.push_back(DelayedAddObjCClassProperty( 2914 class_clang_type, prop_name, member_type->GetLayoutCompilerType(), 2915 ivar_decl, prop_setter_name, prop_getter_name, prop_attributes, 2916 &metadata)); 2917 2918 if (ivar_decl) 2919 m_ast.SetMetadataAsUserID(ivar_decl, die.GetID()); 2920 } 2921 } 2922 } 2923 } 2924 2925 bool DWARFASTParserClang::ParseChildMembers( 2926 const DWARFDIE &parent_die, CompilerType &class_clang_type, 2927 const LanguageType class_language, 2928 std::vector<std::unique_ptr<clang::CXXBaseSpecifier>> &base_classes, 2929 std::vector<int> &member_accessibilities, 2930 std::vector<DWARFDIE> &member_function_dies, 2931 DelayedPropertyList &delayed_properties, AccessType &default_accessibility, 2932 bool &is_a_class, ClangASTImporter::LayoutInfo &layout_info) { 2933 if (!parent_die) 2934 return false; 2935 2936 BitfieldInfo last_field_info; 2937 2938 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule(); 2939 ClangASTContext *ast = 2940 llvm::dyn_cast_or_null<ClangASTContext>(class_clang_type.GetTypeSystem()); 2941 if (ast == nullptr) 2942 return false; 2943 2944 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2945 die = die.GetSibling()) { 2946 dw_tag_t tag = die.Tag(); 2947 2948 switch (tag) { 2949 case DW_TAG_member: 2950 case DW_TAG_APPLE_property: 2951 ParseSingleMember(die, parent_die, class_clang_type, class_language, 2952 member_accessibilities, default_accessibility, 2953 delayed_properties, layout_info, last_field_info); 2954 break; 2955 2956 case DW_TAG_subprogram: 2957 // Let the type parsing code handle this one for us. 2958 member_function_dies.push_back(die); 2959 break; 2960 2961 case DW_TAG_inheritance: { 2962 is_a_class = true; 2963 if (default_accessibility == eAccessNone) 2964 default_accessibility = eAccessPrivate; 2965 // TODO: implement DW_TAG_inheritance type parsing 2966 DWARFAttributes attributes; 2967 const size_t num_attributes = die.GetAttributes(attributes); 2968 if (num_attributes > 0) { 2969 DWARFFormValue encoding_form; 2970 AccessType accessibility = default_accessibility; 2971 bool is_virtual = false; 2972 bool is_base_of_class = true; 2973 off_t member_byte_offset = 0; 2974 uint32_t i; 2975 for (i = 0; i < num_attributes; ++i) { 2976 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2977 DWARFFormValue form_value; 2978 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2979 switch (attr) { 2980 case DW_AT_type: 2981 encoding_form = form_value; 2982 break; 2983 case DW_AT_data_member_location: 2984 if (form_value.BlockData()) { 2985 Value initialValue(0); 2986 Value memberOffset(0); 2987 const DWARFDataExtractor &debug_info_data = die.GetData(); 2988 uint32_t block_length = form_value.Unsigned(); 2989 uint32_t block_offset = 2990 form_value.BlockData() - debug_info_data.GetDataStart(); 2991 if (DWARFExpression::Evaluate( 2992 nullptr, nullptr, module_sp, 2993 DataExtractor(debug_info_data, block_offset, 2994 block_length), 2995 die.GetCU(), eRegisterKindDWARF, &initialValue, nullptr, 2996 memberOffset, nullptr)) { 2997 member_byte_offset = 2998 memberOffset.ResolveValue(nullptr).UInt(); 2999 } 3000 } else { 3001 // With DWARF 3 and later, if the value is an integer constant, 3002 // this form value is the offset in bytes from the beginning of 3003 // the containing entity. 3004 member_byte_offset = form_value.Unsigned(); 3005 } 3006 break; 3007 3008 case DW_AT_accessibility: 3009 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 3010 break; 3011 3012 case DW_AT_virtuality: 3013 is_virtual = form_value.Boolean(); 3014 break; 3015 3016 case DW_AT_sibling: 3017 break; 3018 3019 default: 3020 break; 3021 } 3022 } 3023 } 3024 3025 Type *base_class_type = die.ResolveTypeUID(encoding_form.Reference()); 3026 if (base_class_type == nullptr) { 3027 module_sp->ReportError("0x%8.8x: DW_TAG_inheritance failed to " 3028 "resolve the base class at 0x%8.8x" 3029 " from enclosing type 0x%8.8x. \nPlease file " 3030 "a bug and attach the file at the start of " 3031 "this error message", 3032 die.GetOffset(), 3033 encoding_form.Reference().GetOffset(), 3034 parent_die.GetOffset()); 3035 break; 3036 } 3037 3038 CompilerType base_class_clang_type = 3039 base_class_type->GetFullCompilerType(); 3040 assert(base_class_clang_type); 3041 if (class_language == eLanguageTypeObjC) { 3042 ast->SetObjCSuperClass(class_clang_type, base_class_clang_type); 3043 } else { 3044 std::unique_ptr<clang::CXXBaseSpecifier> result = 3045 ast->CreateBaseClassSpecifier( 3046 base_class_clang_type.GetOpaqueQualType(), accessibility, 3047 is_virtual, is_base_of_class); 3048 if (!result) 3049 break; 3050 3051 base_classes.push_back(std::move(result)); 3052 3053 if (is_virtual) { 3054 // Do not specify any offset for virtual inheritance. The DWARF 3055 // produced by clang doesn't give us a constant offset, but gives 3056 // us a DWARF expressions that requires an actual object in memory. 3057 // the DW_AT_data_member_location for a virtual base class looks 3058 // like: 3059 // DW_AT_data_member_location( DW_OP_dup, DW_OP_deref, 3060 // DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref, 3061 // DW_OP_plus ) 3062 // Given this, there is really no valid response we can give to 3063 // clang for virtual base class offsets, and this should eventually 3064 // be removed from LayoutRecordType() in the external 3065 // AST source in clang. 3066 } else { 3067 layout_info.base_offsets.insert(std::make_pair( 3068 ast->GetAsCXXRecordDecl( 3069 base_class_clang_type.GetOpaqueQualType()), 3070 clang::CharUnits::fromQuantity(member_byte_offset))); 3071 } 3072 } 3073 } 3074 } break; 3075 3076 default: 3077 break; 3078 } 3079 } 3080 3081 return true; 3082 } 3083 3084 size_t DWARFASTParserClang::ParseChildParameters( 3085 clang::DeclContext *containing_decl_ctx, const DWARFDIE &parent_die, 3086 bool skip_artificial, bool &is_static, bool &is_variadic, 3087 bool &has_template_params, std::vector<CompilerType> &function_param_types, 3088 std::vector<clang::ParmVarDecl *> &function_param_decls, 3089 unsigned &type_quals) { 3090 if (!parent_die) 3091 return 0; 3092 3093 size_t arg_idx = 0; 3094 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 3095 die = die.GetSibling()) { 3096 const dw_tag_t tag = die.Tag(); 3097 switch (tag) { 3098 case DW_TAG_formal_parameter: { 3099 DWARFAttributes attributes; 3100 const size_t num_attributes = die.GetAttributes(attributes); 3101 if (num_attributes > 0) { 3102 const char *name = nullptr; 3103 DWARFFormValue param_type_die_form; 3104 bool is_artificial = false; 3105 // one of None, Auto, Register, Extern, Static, PrivateExtern 3106 3107 clang::StorageClass storage = clang::SC_None; 3108 uint32_t i; 3109 for (i = 0; i < num_attributes; ++i) { 3110 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3111 DWARFFormValue form_value; 3112 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3113 switch (attr) { 3114 case DW_AT_name: 3115 name = form_value.AsCString(); 3116 break; 3117 case DW_AT_type: 3118 param_type_die_form = form_value; 3119 break; 3120 case DW_AT_artificial: 3121 is_artificial = form_value.Boolean(); 3122 break; 3123 case DW_AT_location: 3124 case DW_AT_const_value: 3125 case DW_AT_default_value: 3126 case DW_AT_description: 3127 case DW_AT_endianity: 3128 case DW_AT_is_optional: 3129 case DW_AT_segment: 3130 case DW_AT_variable_parameter: 3131 default: 3132 case DW_AT_abstract_origin: 3133 case DW_AT_sibling: 3134 break; 3135 } 3136 } 3137 } 3138 3139 bool skip = false; 3140 if (skip_artificial && is_artificial) { 3141 // In order to determine if a C++ member function is "const" we 3142 // have to look at the const-ness of "this"... 3143 if (arg_idx == 0 && 3144 DeclKindIsCXXClass(containing_decl_ctx->getDeclKind()) && 3145 // Often times compilers omit the "this" name for the 3146 // specification DIEs, so we can't rely upon the name being in 3147 // the formal parameter DIE... 3148 (name == nullptr || ::strcmp(name, "this") == 0)) { 3149 Type *this_type = 3150 die.ResolveTypeUID(param_type_die_form.Reference()); 3151 if (this_type) { 3152 uint32_t encoding_mask = this_type->GetEncodingMask(); 3153 if (encoding_mask & Type::eEncodingIsPointerUID) { 3154 is_static = false; 3155 3156 if (encoding_mask & (1u << Type::eEncodingIsConstUID)) 3157 type_quals |= clang::Qualifiers::Const; 3158 if (encoding_mask & (1u << Type::eEncodingIsVolatileUID)) 3159 type_quals |= clang::Qualifiers::Volatile; 3160 } 3161 } 3162 } 3163 skip = true; 3164 } 3165 3166 if (!skip) { 3167 Type *type = die.ResolveTypeUID(param_type_die_form.Reference()); 3168 if (type) { 3169 function_param_types.push_back(type->GetForwardCompilerType()); 3170 3171 clang::ParmVarDecl *param_var_decl = 3172 m_ast.CreateParameterDeclaration(containing_decl_ctx, name, 3173 type->GetForwardCompilerType(), 3174 storage); 3175 assert(param_var_decl); 3176 function_param_decls.push_back(param_var_decl); 3177 3178 m_ast.SetMetadataAsUserID(param_var_decl, die.GetID()); 3179 } 3180 } 3181 } 3182 arg_idx++; 3183 } break; 3184 3185 case DW_TAG_unspecified_parameters: 3186 is_variadic = true; 3187 break; 3188 3189 case DW_TAG_template_type_parameter: 3190 case DW_TAG_template_value_parameter: 3191 case DW_TAG_GNU_template_parameter_pack: 3192 // The one caller of this was never using the template_param_infos, and 3193 // the local variable was taking up a large amount of stack space in 3194 // SymbolFileDWARF::ParseType() so this was removed. If we ever need the 3195 // template params back, we can add them back. 3196 // ParseTemplateDIE (dwarf_cu, die, template_param_infos); 3197 has_template_params = true; 3198 break; 3199 3200 default: 3201 break; 3202 } 3203 } 3204 return arg_idx; 3205 } 3206 3207 llvm::Optional<SymbolFile::ArrayInfo> 3208 DWARFASTParser::ParseChildArrayInfo(const DWARFDIE &parent_die, 3209 const ExecutionContext *exe_ctx) { 3210 SymbolFile::ArrayInfo array_info; 3211 if (!parent_die) 3212 return llvm::None; 3213 3214 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 3215 die = die.GetSibling()) { 3216 const dw_tag_t tag = die.Tag(); 3217 switch (tag) { 3218 case DW_TAG_subrange_type: { 3219 DWARFAttributes attributes; 3220 const size_t num_child_attributes = die.GetAttributes(attributes); 3221 if (num_child_attributes > 0) { 3222 uint64_t num_elements = 0; 3223 uint64_t lower_bound = 0; 3224 uint64_t upper_bound = 0; 3225 bool upper_bound_valid = false; 3226 uint32_t i; 3227 for (i = 0; i < num_child_attributes; ++i) { 3228 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3229 DWARFFormValue form_value; 3230 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3231 switch (attr) { 3232 case DW_AT_name: 3233 break; 3234 3235 case DW_AT_count: 3236 if (DWARFDIE var_die = die.GetReferencedDIE(DW_AT_count)) { 3237 if (var_die.Tag() == DW_TAG_variable) 3238 if (exe_ctx) { 3239 if (auto frame = exe_ctx->GetFrameSP()) { 3240 Status error; 3241 lldb::VariableSP var_sp; 3242 auto valobj_sp = frame->GetValueForVariableExpressionPath( 3243 var_die.GetName(), eNoDynamicValues, 0, var_sp, 3244 error); 3245 if (valobj_sp) { 3246 num_elements = valobj_sp->GetValueAsUnsigned(0); 3247 break; 3248 } 3249 } 3250 } 3251 } else 3252 num_elements = form_value.Unsigned(); 3253 break; 3254 3255 case DW_AT_bit_stride: 3256 array_info.bit_stride = form_value.Unsigned(); 3257 break; 3258 3259 case DW_AT_byte_stride: 3260 array_info.byte_stride = form_value.Unsigned(); 3261 break; 3262 3263 case DW_AT_lower_bound: 3264 lower_bound = form_value.Unsigned(); 3265 break; 3266 3267 case DW_AT_upper_bound: 3268 upper_bound_valid = true; 3269 upper_bound = form_value.Unsigned(); 3270 break; 3271 3272 default: 3273 case DW_AT_abstract_origin: 3274 case DW_AT_accessibility: 3275 case DW_AT_allocated: 3276 case DW_AT_associated: 3277 case DW_AT_data_location: 3278 case DW_AT_declaration: 3279 case DW_AT_description: 3280 case DW_AT_sibling: 3281 case DW_AT_threads_scaled: 3282 case DW_AT_type: 3283 case DW_AT_visibility: 3284 break; 3285 } 3286 } 3287 } 3288 3289 if (num_elements == 0) { 3290 if (upper_bound_valid && upper_bound >= lower_bound) 3291 num_elements = upper_bound - lower_bound + 1; 3292 } 3293 3294 array_info.element_orders.push_back(num_elements); 3295 } 3296 } break; 3297 default: 3298 break; 3299 } 3300 } 3301 return array_info; 3302 } 3303 3304 Type *DWARFASTParserClang::GetTypeForDIE(const DWARFDIE &die) { 3305 if (die) { 3306 SymbolFileDWARF *dwarf = die.GetDWARF(); 3307 DWARFAttributes attributes; 3308 const size_t num_attributes = die.GetAttributes(attributes); 3309 if (num_attributes > 0) { 3310 DWARFFormValue type_die_form; 3311 for (size_t i = 0; i < num_attributes; ++i) { 3312 dw_attr_t attr = attributes.AttributeAtIndex(i); 3313 DWARFFormValue form_value; 3314 3315 if (attr == DW_AT_type && 3316 attributes.ExtractFormValueAtIndex(i, form_value)) 3317 return dwarf->ResolveTypeUID(form_value.Reference(), true); 3318 } 3319 } 3320 } 3321 3322 return nullptr; 3323 } 3324 3325 clang::Decl *DWARFASTParserClang::GetClangDeclForDIE(const DWARFDIE &die) { 3326 if (!die) 3327 return nullptr; 3328 3329 switch (die.Tag()) { 3330 case DW_TAG_variable: 3331 case DW_TAG_constant: 3332 case DW_TAG_formal_parameter: 3333 case DW_TAG_imported_declaration: 3334 case DW_TAG_imported_module: 3335 break; 3336 default: 3337 return nullptr; 3338 } 3339 3340 DIEToDeclMap::iterator cache_pos = m_die_to_decl.find(die.GetDIE()); 3341 if (cache_pos != m_die_to_decl.end()) 3342 return cache_pos->second; 3343 3344 if (DWARFDIE spec_die = die.GetReferencedDIE(DW_AT_specification)) { 3345 clang::Decl *decl = GetClangDeclForDIE(spec_die); 3346 m_die_to_decl[die.GetDIE()] = decl; 3347 m_decl_to_die[decl].insert(die.GetDIE()); 3348 return decl; 3349 } 3350 3351 if (DWARFDIE abstract_origin_die = 3352 die.GetReferencedDIE(DW_AT_abstract_origin)) { 3353 clang::Decl *decl = GetClangDeclForDIE(abstract_origin_die); 3354 m_die_to_decl[die.GetDIE()] = decl; 3355 m_decl_to_die[decl].insert(die.GetDIE()); 3356 return decl; 3357 } 3358 3359 clang::Decl *decl = nullptr; 3360 switch (die.Tag()) { 3361 case DW_TAG_variable: 3362 case DW_TAG_constant: 3363 case DW_TAG_formal_parameter: { 3364 SymbolFileDWARF *dwarf = die.GetDWARF(); 3365 Type *type = GetTypeForDIE(die); 3366 if (dwarf && type) { 3367 const char *name = die.GetName(); 3368 clang::DeclContext *decl_context = 3369 ClangASTContext::DeclContextGetAsDeclContext( 3370 dwarf->GetDeclContextContainingUID(die.GetID())); 3371 decl = m_ast.CreateVariableDeclaration( 3372 decl_context, name, 3373 ClangUtil::GetQualType(type->GetForwardCompilerType())); 3374 } 3375 break; 3376 } 3377 case DW_TAG_imported_declaration: { 3378 SymbolFileDWARF *dwarf = die.GetDWARF(); 3379 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3380 if (imported_uid) { 3381 CompilerDecl imported_decl = imported_uid.GetDecl(); 3382 if (imported_decl) { 3383 clang::DeclContext *decl_context = 3384 ClangASTContext::DeclContextGetAsDeclContext( 3385 dwarf->GetDeclContextContainingUID(die.GetID())); 3386 if (clang::NamedDecl *clang_imported_decl = 3387 llvm::dyn_cast<clang::NamedDecl>( 3388 (clang::Decl *)imported_decl.GetOpaqueDecl())) 3389 decl = 3390 m_ast.CreateUsingDeclaration(decl_context, clang_imported_decl); 3391 } 3392 } 3393 break; 3394 } 3395 case DW_TAG_imported_module: { 3396 SymbolFileDWARF *dwarf = die.GetDWARF(); 3397 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3398 3399 if (imported_uid) { 3400 CompilerDeclContext imported_decl_ctx = imported_uid.GetDeclContext(); 3401 if (imported_decl_ctx) { 3402 clang::DeclContext *decl_context = 3403 ClangASTContext::DeclContextGetAsDeclContext( 3404 dwarf->GetDeclContextContainingUID(die.GetID())); 3405 if (clang::NamespaceDecl *ns_decl = 3406 ClangASTContext::DeclContextGetAsNamespaceDecl( 3407 imported_decl_ctx)) 3408 decl = m_ast.CreateUsingDirectiveDeclaration(decl_context, ns_decl); 3409 } 3410 } 3411 break; 3412 } 3413 default: 3414 break; 3415 } 3416 3417 m_die_to_decl[die.GetDIE()] = decl; 3418 m_decl_to_die[decl].insert(die.GetDIE()); 3419 3420 return decl; 3421 } 3422 3423 clang::DeclContext * 3424 DWARFASTParserClang::GetClangDeclContextForDIE(const DWARFDIE &die) { 3425 if (die) { 3426 clang::DeclContext *decl_ctx = GetCachedClangDeclContextForDIE(die); 3427 if (decl_ctx) 3428 return decl_ctx; 3429 3430 bool try_parsing_type = true; 3431 switch (die.Tag()) { 3432 case DW_TAG_compile_unit: 3433 case DW_TAG_partial_unit: 3434 decl_ctx = m_ast.GetTranslationUnitDecl(); 3435 try_parsing_type = false; 3436 break; 3437 3438 case DW_TAG_namespace: 3439 decl_ctx = ResolveNamespaceDIE(die); 3440 try_parsing_type = false; 3441 break; 3442 3443 case DW_TAG_lexical_block: 3444 decl_ctx = GetDeclContextForBlock(die); 3445 try_parsing_type = false; 3446 break; 3447 3448 default: 3449 break; 3450 } 3451 3452 if (decl_ctx == nullptr && try_parsing_type) { 3453 Type *type = die.GetDWARF()->ResolveType(die); 3454 if (type) 3455 decl_ctx = GetCachedClangDeclContextForDIE(die); 3456 } 3457 3458 if (decl_ctx) { 3459 LinkDeclContextToDIE(decl_ctx, die); 3460 return decl_ctx; 3461 } 3462 } 3463 return nullptr; 3464 } 3465 3466 static bool IsSubroutine(const DWARFDIE &die) { 3467 switch (die.Tag()) { 3468 case DW_TAG_subprogram: 3469 case DW_TAG_inlined_subroutine: 3470 return true; 3471 default: 3472 return false; 3473 } 3474 } 3475 3476 static DWARFDIE GetContainingFunctionWithAbstractOrigin(const DWARFDIE &die) { 3477 for (DWARFDIE candidate = die; candidate; candidate = candidate.GetParent()) { 3478 if (IsSubroutine(candidate)) { 3479 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3480 return candidate; 3481 } else { 3482 return DWARFDIE(); 3483 } 3484 } 3485 } 3486 assert(0 && "Shouldn't call GetContainingFunctionWithAbstractOrigin on " 3487 "something not in a function"); 3488 return DWARFDIE(); 3489 } 3490 3491 static DWARFDIE FindAnyChildWithAbstractOrigin(const DWARFDIE &context) { 3492 for (DWARFDIE candidate = context.GetFirstChild(); candidate.IsValid(); 3493 candidate = candidate.GetSibling()) { 3494 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3495 return candidate; 3496 } 3497 } 3498 return DWARFDIE(); 3499 } 3500 3501 static DWARFDIE FindFirstChildWithAbstractOrigin(const DWARFDIE &block, 3502 const DWARFDIE &function) { 3503 assert(IsSubroutine(function)); 3504 for (DWARFDIE context = block; context != function.GetParent(); 3505 context = context.GetParent()) { 3506 assert(!IsSubroutine(context) || context == function); 3507 if (DWARFDIE child = FindAnyChildWithAbstractOrigin(context)) { 3508 return child; 3509 } 3510 } 3511 return DWARFDIE(); 3512 } 3513 3514 clang::DeclContext * 3515 DWARFASTParserClang::GetDeclContextForBlock(const DWARFDIE &die) { 3516 assert(die.Tag() == DW_TAG_lexical_block); 3517 DWARFDIE containing_function_with_abstract_origin = 3518 GetContainingFunctionWithAbstractOrigin(die); 3519 if (!containing_function_with_abstract_origin) { 3520 return (clang::DeclContext *)ResolveBlockDIE(die); 3521 } 3522 DWARFDIE child = FindFirstChildWithAbstractOrigin( 3523 die, containing_function_with_abstract_origin); 3524 CompilerDeclContext decl_context = 3525 GetDeclContextContainingUIDFromDWARF(child); 3526 return (clang::DeclContext *)decl_context.GetOpaqueDeclContext(); 3527 } 3528 3529 clang::BlockDecl *DWARFASTParserClang::ResolveBlockDIE(const DWARFDIE &die) { 3530 if (die && die.Tag() == DW_TAG_lexical_block) { 3531 clang::BlockDecl *decl = 3532 llvm::cast_or_null<clang::BlockDecl>(m_die_to_decl_ctx[die.GetDIE()]); 3533 3534 if (!decl) { 3535 DWARFDIE decl_context_die; 3536 clang::DeclContext *decl_context = 3537 GetClangDeclContextContainingDIE(die, &decl_context_die); 3538 decl = m_ast.CreateBlockDeclaration(decl_context); 3539 3540 if (decl) 3541 LinkDeclContextToDIE((clang::DeclContext *)decl, die); 3542 } 3543 3544 return decl; 3545 } 3546 return nullptr; 3547 } 3548 3549 clang::NamespaceDecl * 3550 DWARFASTParserClang::ResolveNamespaceDIE(const DWARFDIE &die) { 3551 if (die && die.Tag() == DW_TAG_namespace) { 3552 // See if we already parsed this namespace DIE and associated it with a 3553 // uniqued namespace declaration 3554 clang::NamespaceDecl *namespace_decl = 3555 static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die.GetDIE()]); 3556 if (namespace_decl) 3557 return namespace_decl; 3558 else { 3559 const char *namespace_name = die.GetName(); 3560 clang::DeclContext *containing_decl_ctx = 3561 GetClangDeclContextContainingDIE(die, nullptr); 3562 bool is_inline = 3563 die.GetAttributeValueAsUnsigned(DW_AT_export_symbols, 0) != 0; 3564 3565 namespace_decl = m_ast.GetUniqueNamespaceDeclaration( 3566 namespace_name, containing_decl_ctx, is_inline); 3567 Log *log = 3568 nullptr; // (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 3569 if (log) { 3570 SymbolFileDWARF *dwarf = die.GetDWARF(); 3571 if (namespace_name) { 3572 dwarf->GetObjectFile()->GetModule()->LogMessage( 3573 log, 3574 "ASTContext => %p: 0x%8.8" PRIx64 3575 ": DW_TAG_namespace with DW_AT_name(\"%s\") => " 3576 "clang::NamespaceDecl *%p (original = %p)", 3577 static_cast<void *>(&m_ast.getASTContext()), die.GetID(), 3578 namespace_name, static_cast<void *>(namespace_decl), 3579 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3580 } else { 3581 dwarf->GetObjectFile()->GetModule()->LogMessage( 3582 log, 3583 "ASTContext => %p: 0x%8.8" PRIx64 3584 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p " 3585 "(original = %p)", 3586 static_cast<void *>(&m_ast.getASTContext()), die.GetID(), 3587 static_cast<void *>(namespace_decl), 3588 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3589 } 3590 } 3591 3592 if (namespace_decl) 3593 LinkDeclContextToDIE((clang::DeclContext *)namespace_decl, die); 3594 return namespace_decl; 3595 } 3596 } 3597 return nullptr; 3598 } 3599 3600 clang::DeclContext *DWARFASTParserClang::GetClangDeclContextContainingDIE( 3601 const DWARFDIE &die, DWARFDIE *decl_ctx_die_copy) { 3602 SymbolFileDWARF *dwarf = die.GetDWARF(); 3603 3604 DWARFDIE decl_ctx_die = dwarf->GetDeclContextDIEContainingDIE(die); 3605 3606 if (decl_ctx_die_copy) 3607 *decl_ctx_die_copy = decl_ctx_die; 3608 3609 if (decl_ctx_die) { 3610 clang::DeclContext *clang_decl_ctx = 3611 GetClangDeclContextForDIE(decl_ctx_die); 3612 if (clang_decl_ctx) 3613 return clang_decl_ctx; 3614 } 3615 return m_ast.GetTranslationUnitDecl(); 3616 } 3617 3618 clang::DeclContext * 3619 DWARFASTParserClang::GetCachedClangDeclContextForDIE(const DWARFDIE &die) { 3620 if (die) { 3621 DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find(die.GetDIE()); 3622 if (pos != m_die_to_decl_ctx.end()) 3623 return pos->second; 3624 } 3625 return nullptr; 3626 } 3627 3628 void DWARFASTParserClang::LinkDeclContextToDIE(clang::DeclContext *decl_ctx, 3629 const DWARFDIE &die) { 3630 m_die_to_decl_ctx[die.GetDIE()] = decl_ctx; 3631 // There can be many DIEs for a single decl context 3632 // m_decl_ctx_to_die[decl_ctx].insert(die.GetDIE()); 3633 m_decl_ctx_to_die.insert(std::make_pair(decl_ctx, die)); 3634 } 3635 3636 bool DWARFASTParserClang::CopyUniqueClassMethodTypes( 3637 const DWARFDIE &src_class_die, const DWARFDIE &dst_class_die, 3638 lldb_private::Type *class_type, std::vector<DWARFDIE> &failures) { 3639 if (!class_type || !src_class_die || !dst_class_die) 3640 return false; 3641 if (src_class_die.Tag() != dst_class_die.Tag()) 3642 return false; 3643 3644 // We need to complete the class type so we can get all of the method types 3645 // parsed so we can then unique those types to their equivalent counterparts 3646 // in "dst_cu" and "dst_class_die" 3647 class_type->GetFullCompilerType(); 3648 3649 DWARFDIE src_die; 3650 DWARFDIE dst_die; 3651 UniqueCStringMap<DWARFDIE> src_name_to_die; 3652 UniqueCStringMap<DWARFDIE> dst_name_to_die; 3653 UniqueCStringMap<DWARFDIE> src_name_to_die_artificial; 3654 UniqueCStringMap<DWARFDIE> dst_name_to_die_artificial; 3655 for (src_die = src_class_die.GetFirstChild(); src_die.IsValid(); 3656 src_die = src_die.GetSibling()) { 3657 if (src_die.Tag() == DW_TAG_subprogram) { 3658 // Make sure this is a declaration and not a concrete instance by looking 3659 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3660 // are placed inside the class definitions and shouldn't be included in 3661 // the list of things are are tracking here. 3662 if (src_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 3663 const char *src_name = src_die.GetMangledName(); 3664 if (src_name) { 3665 ConstString src_const_name(src_name); 3666 if (src_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3667 src_name_to_die_artificial.Append(src_const_name, src_die); 3668 else 3669 src_name_to_die.Append(src_const_name, src_die); 3670 } 3671 } 3672 } 3673 } 3674 for (dst_die = dst_class_die.GetFirstChild(); dst_die.IsValid(); 3675 dst_die = dst_die.GetSibling()) { 3676 if (dst_die.Tag() == DW_TAG_subprogram) { 3677 // Make sure this is a declaration and not a concrete instance by looking 3678 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3679 // are placed inside the class definitions and shouldn't be included in 3680 // the list of things are are tracking here. 3681 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 3682 const char *dst_name = dst_die.GetMangledName(); 3683 if (dst_name) { 3684 ConstString dst_const_name(dst_name); 3685 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3686 dst_name_to_die_artificial.Append(dst_const_name, dst_die); 3687 else 3688 dst_name_to_die.Append(dst_const_name, dst_die); 3689 } 3690 } 3691 } 3692 } 3693 const uint32_t src_size = src_name_to_die.GetSize(); 3694 const uint32_t dst_size = dst_name_to_die.GetSize(); 3695 Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | 3696 // DWARF_LOG_TYPE_COMPLETION)); 3697 3698 // Is everything kosher so we can go through the members at top speed? 3699 bool fast_path = true; 3700 3701 if (src_size != dst_size) { 3702 if (src_size != 0 && dst_size != 0) { 3703 LLDB_LOGF(log, 3704 "warning: trying to unique class DIE 0x%8.8x to 0x%8.8x, " 3705 "but they didn't have the same size (src=%d, dst=%d)", 3706 src_class_die.GetOffset(), dst_class_die.GetOffset(), src_size, 3707 dst_size); 3708 } 3709 3710 fast_path = false; 3711 } 3712 3713 uint32_t idx; 3714 3715 if (fast_path) { 3716 for (idx = 0; idx < src_size; ++idx) { 3717 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 3718 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3719 3720 if (src_die.Tag() != dst_die.Tag()) { 3721 LLDB_LOGF(log, 3722 "warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 3723 "but 0x%8.8x (%s) tags didn't match 0x%8.8x (%s)", 3724 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3725 src_die.GetOffset(), src_die.GetTagAsCString(), 3726 dst_die.GetOffset(), dst_die.GetTagAsCString()); 3727 fast_path = false; 3728 } 3729 3730 const char *src_name = src_die.GetMangledName(); 3731 const char *dst_name = dst_die.GetMangledName(); 3732 3733 // Make sure the names match 3734 if (src_name == dst_name || (strcmp(src_name, dst_name) == 0)) 3735 continue; 3736 3737 LLDB_LOGF(log, 3738 "warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 3739 "but 0x%8.8x (%s) names didn't match 0x%8.8x (%s)", 3740 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3741 src_die.GetOffset(), src_name, dst_die.GetOffset(), dst_name); 3742 3743 fast_path = false; 3744 } 3745 } 3746 3747 DWARFASTParserClang *src_dwarf_ast_parser = 3748 (DWARFASTParserClang *)src_die.GetDWARFParser(); 3749 DWARFASTParserClang *dst_dwarf_ast_parser = 3750 (DWARFASTParserClang *)dst_die.GetDWARFParser(); 3751 3752 // Now do the work of linking the DeclContexts and Types. 3753 if (fast_path) { 3754 // We can do this quickly. Just run across the tables index-for-index 3755 // since we know each node has matching names and tags. 3756 for (idx = 0; idx < src_size; ++idx) { 3757 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 3758 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3759 3760 clang::DeclContext *src_decl_ctx = 3761 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3762 if (src_decl_ctx) { 3763 LLDB_LOGF(log, "uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3764 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 3765 dst_die.GetOffset()); 3766 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 3767 } else { 3768 LLDB_LOGF(log, 3769 "warning: tried to unique decl context from 0x%8.8x for " 3770 "0x%8.8x, but none was found", 3771 src_die.GetOffset(), dst_die.GetOffset()); 3772 } 3773 3774 Type *src_child_type = 3775 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3776 if (src_child_type) { 3777 LLDB_LOGF(log, 3778 "uniquing type %p (uid=0x%" PRIx64 3779 ") from 0x%8.8x for 0x%8.8x", 3780 static_cast<void *>(src_child_type), src_child_type->GetID(), 3781 src_die.GetOffset(), dst_die.GetOffset()); 3782 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 3783 } else { 3784 LLDB_LOGF(log, 3785 "warning: tried to unique lldb_private::Type from " 3786 "0x%8.8x for 0x%8.8x, but none was found", 3787 src_die.GetOffset(), dst_die.GetOffset()); 3788 } 3789 } 3790 } else { 3791 // We must do this slowly. For each member of the destination, look up a 3792 // member in the source with the same name, check its tag, and unique them 3793 // if everything matches up. Report failures. 3794 3795 if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty()) { 3796 src_name_to_die.Sort(); 3797 3798 for (idx = 0; idx < dst_size; ++idx) { 3799 ConstString dst_name = dst_name_to_die.GetCStringAtIndex(idx); 3800 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3801 src_die = src_name_to_die.Find(dst_name, DWARFDIE()); 3802 3803 if (src_die && (src_die.Tag() == dst_die.Tag())) { 3804 clang::DeclContext *src_decl_ctx = 3805 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3806 if (src_decl_ctx) { 3807 LLDB_LOGF(log, "uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3808 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 3809 dst_die.GetOffset()); 3810 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 3811 } else { 3812 LLDB_LOGF(log, 3813 "warning: tried to unique decl context from 0x%8.8x " 3814 "for 0x%8.8x, but none was found", 3815 src_die.GetOffset(), dst_die.GetOffset()); 3816 } 3817 3818 Type *src_child_type = 3819 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3820 if (src_child_type) { 3821 LLDB_LOGF( 3822 log, 3823 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 3824 static_cast<void *>(src_child_type), src_child_type->GetID(), 3825 src_die.GetOffset(), dst_die.GetOffset()); 3826 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = 3827 src_child_type; 3828 } else { 3829 LLDB_LOGF(log, 3830 "warning: tried to unique lldb_private::Type from " 3831 "0x%8.8x for 0x%8.8x, but none was found", 3832 src_die.GetOffset(), dst_die.GetOffset()); 3833 } 3834 } else { 3835 LLDB_LOGF(log, "warning: couldn't find a match for 0x%8.8x", 3836 dst_die.GetOffset()); 3837 3838 failures.push_back(dst_die); 3839 } 3840 } 3841 } 3842 } 3843 3844 const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize(); 3845 const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize(); 3846 3847 if (src_size_artificial && dst_size_artificial) { 3848 dst_name_to_die_artificial.Sort(); 3849 3850 for (idx = 0; idx < src_size_artificial; ++idx) { 3851 ConstString src_name_artificial = 3852 src_name_to_die_artificial.GetCStringAtIndex(idx); 3853 src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 3854 dst_die = 3855 dst_name_to_die_artificial.Find(src_name_artificial, DWARFDIE()); 3856 3857 if (dst_die) { 3858 // Both classes have the artificial types, link them 3859 clang::DeclContext *src_decl_ctx = 3860 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3861 if (src_decl_ctx) { 3862 LLDB_LOGF(log, "uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3863 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 3864 dst_die.GetOffset()); 3865 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 3866 } else { 3867 LLDB_LOGF(log, 3868 "warning: tried to unique decl context from 0x%8.8x " 3869 "for 0x%8.8x, but none was found", 3870 src_die.GetOffset(), dst_die.GetOffset()); 3871 } 3872 3873 Type *src_child_type = 3874 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3875 if (src_child_type) { 3876 LLDB_LOGF( 3877 log, 3878 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 3879 static_cast<void *>(src_child_type), src_child_type->GetID(), 3880 src_die.GetOffset(), dst_die.GetOffset()); 3881 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 3882 } else { 3883 LLDB_LOGF(log, 3884 "warning: tried to unique lldb_private::Type from " 3885 "0x%8.8x for 0x%8.8x, but none was found", 3886 src_die.GetOffset(), dst_die.GetOffset()); 3887 } 3888 } 3889 } 3890 } 3891 3892 if (dst_size_artificial) { 3893 for (idx = 0; idx < dst_size_artificial; ++idx) { 3894 ConstString dst_name_artificial = 3895 dst_name_to_die_artificial.GetCStringAtIndex(idx); 3896 dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 3897 LLDB_LOGF(log, 3898 "warning: need to create artificial method for 0x%8.8x for " 3899 "method '%s'", 3900 dst_die.GetOffset(), dst_name_artificial.GetCString()); 3901 3902 failures.push_back(dst_die); 3903 } 3904 } 3905 3906 return !failures.empty(); 3907 } 3908