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