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 NULL, 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 TypeSP DWARFASTParserClang::ParseTypeFromDWARF(const SymbolContext &sc, 232 const DWARFDIE &die, Log *log, 233 bool *type_is_new_ptr) { 234 TypeSP type_sp; 235 236 if (type_is_new_ptr) 237 *type_is_new_ptr = false; 238 239 AccessType accessibility = eAccessNone; 240 if (die) { 241 SymbolFileDWARF *dwarf = die.GetDWARF(); 242 if (log) { 243 DWARFDIE context_die; 244 clang::DeclContext *context = 245 GetClangDeclContextContainingDIE(die, &context_die); 246 247 dwarf->GetObjectFile()->GetModule()->LogMessage( 248 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x, decl_ctx = %p (die " 249 "0x%8.8x)) %s name = '%s')", 250 die.GetOffset(), static_cast<void *>(context), 251 context_die.GetOffset(), die.GetTagAsCString(), die.GetName()); 252 } 253 Type *type_ptr = dwarf->GetDIEToType().lookup(die.GetDIE()); 254 TypeList *type_list = dwarf->GetTypeList(); 255 if (type_ptr == NULL) { 256 if (type_is_new_ptr) 257 *type_is_new_ptr = true; 258 259 const dw_tag_t tag = die.Tag(); 260 261 bool is_forward_declaration = false; 262 DWARFAttributes attributes; 263 const char *type_name_cstr = NULL; 264 const char *mangled_name_cstr = NULL; 265 ConstString type_name_const_str; 266 Type::ResolveState resolve_state = Type::eResolveStateUnresolved; 267 llvm::Optional<uint64_t> byte_size; 268 Declaration decl; 269 270 Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID; 271 CompilerType clang_type; 272 DWARFFormValue form_value; 273 274 dw_attr_t attr; 275 276 switch (tag) { 277 case DW_TAG_typedef: 278 case DW_TAG_base_type: 279 case DW_TAG_pointer_type: 280 case DW_TAG_reference_type: 281 case DW_TAG_rvalue_reference_type: 282 case DW_TAG_const_type: 283 case DW_TAG_restrict_type: 284 case DW_TAG_volatile_type: 285 case DW_TAG_unspecified_type: { 286 // Set a bit that lets us know that we are currently parsing this 287 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 288 289 const size_t num_attributes = die.GetAttributes(attributes); 290 uint32_t encoding = 0; 291 DWARFFormValue encoding_uid; 292 293 if (num_attributes > 0) { 294 uint32_t i; 295 for (i = 0; i < num_attributes; ++i) { 296 attr = attributes.AttributeAtIndex(i); 297 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 298 switch (attr) { 299 case DW_AT_decl_file: 300 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 301 form_value.Unsigned())); 302 break; 303 case DW_AT_decl_line: 304 decl.SetLine(form_value.Unsigned()); 305 break; 306 case DW_AT_decl_column: 307 decl.SetColumn(form_value.Unsigned()); 308 break; 309 case DW_AT_name: 310 type_name_cstr = form_value.AsCString(); 311 if (type_name_cstr) 312 type_name_const_str.SetCString(type_name_cstr); 313 break; 314 case DW_AT_byte_size: 315 byte_size = form_value.Unsigned(); 316 break; 317 case DW_AT_encoding: 318 encoding = form_value.Unsigned(); 319 break; 320 case DW_AT_type: 321 encoding_uid = form_value; 322 break; 323 default: 324 case DW_AT_sibling: 325 break; 326 } 327 } 328 } 329 } 330 331 if (tag == DW_TAG_typedef && encoding_uid.IsValid()) { 332 // Try to parse a typedef from the DWO file first as modules can 333 // contain typedef'ed structures that have no names like: 334 // 335 // typedef struct { int a; } Foo; 336 // 337 // In this case we will have a structure with no name and a typedef 338 // named "Foo" that points to this unnamed structure. The name in the 339 // typedef is the only identifier for the struct, so always try to 340 // get typedefs from DWO files if possible. 341 // 342 // The type_sp returned will be empty if the typedef doesn't exist in 343 // a DWO file, so it is cheap to call this function just to check. 344 // 345 // If we don't do this we end up creating a TypeSP that says this is 346 // a typedef to type 0x123 (the DW_AT_type value would be 0x123 in 347 // the DW_TAG_typedef), and this is the unnamed structure type. We 348 // will have a hard time tracking down an unnammed structure type in 349 // the module DWO file, so we make sure we don't get into this 350 // situation by always resolving typedefs from the DWO file. 351 const DWARFDIE encoding_die = dwarf->GetDIE(DIERef(encoding_uid)); 352 353 // First make sure that the die that this is typedef'ed to _is_ just 354 // a declaration (DW_AT_declaration == 1), not a full definition 355 // since template types can't be represented in modules since only 356 // concrete instances of templates are ever emitted and modules won't 357 // contain those 358 if (encoding_die && 359 encoding_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 360 1) { 361 type_sp = ParseTypeFromDWO(die, log); 362 if (type_sp) 363 return type_sp; 364 } 365 } 366 367 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\") type => 0x%8.8lx\n", 368 die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr, 369 encoding_uid.Reference()); 370 371 switch (tag) { 372 default: 373 break; 374 375 case DW_TAG_unspecified_type: 376 if (strcmp(type_name_cstr, "nullptr_t") == 0 || 377 strcmp(type_name_cstr, "decltype(nullptr)") == 0) { 378 resolve_state = Type::eResolveStateFull; 379 clang_type = m_ast.GetBasicType(eBasicTypeNullPtr); 380 break; 381 } 382 // Fall through to base type below in case we can handle the type 383 // there... 384 LLVM_FALLTHROUGH; 385 386 case DW_TAG_base_type: 387 resolve_state = Type::eResolveStateFull; 388 clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize( 389 type_name_cstr, encoding, byte_size.getValueOr(0) * 8); 390 break; 391 392 case DW_TAG_pointer_type: 393 encoding_data_type = Type::eEncodingIsPointerUID; 394 break; 395 case DW_TAG_reference_type: 396 encoding_data_type = Type::eEncodingIsLValueReferenceUID; 397 break; 398 case DW_TAG_rvalue_reference_type: 399 encoding_data_type = Type::eEncodingIsRValueReferenceUID; 400 break; 401 case DW_TAG_typedef: 402 encoding_data_type = Type::eEncodingIsTypedefUID; 403 break; 404 case DW_TAG_const_type: 405 encoding_data_type = Type::eEncodingIsConstUID; 406 break; 407 case DW_TAG_restrict_type: 408 encoding_data_type = Type::eEncodingIsRestrictUID; 409 break; 410 case DW_TAG_volatile_type: 411 encoding_data_type = Type::eEncodingIsVolatileUID; 412 break; 413 } 414 415 if (!clang_type && 416 (encoding_data_type == Type::eEncodingIsPointerUID || 417 encoding_data_type == Type::eEncodingIsTypedefUID)) { 418 if (tag == DW_TAG_pointer_type) { 419 DWARFDIE target_die = die.GetReferencedDIE(DW_AT_type); 420 421 if (target_die.GetAttributeValueAsUnsigned(DW_AT_APPLE_block, 0)) { 422 // Blocks have a __FuncPtr inside them which is a pointer to a 423 // function of the proper type. 424 425 for (DWARFDIE child_die = target_die.GetFirstChild(); 426 child_die.IsValid(); child_die = child_die.GetSibling()) { 427 if (!strcmp(child_die.GetAttributeValueAsString(DW_AT_name, ""), 428 "__FuncPtr")) { 429 DWARFDIE function_pointer_type = 430 child_die.GetReferencedDIE(DW_AT_type); 431 432 if (function_pointer_type) { 433 DWARFDIE function_type = 434 function_pointer_type.GetReferencedDIE(DW_AT_type); 435 436 bool function_type_is_new_pointer; 437 TypeSP lldb_function_type_sp = ParseTypeFromDWARF( 438 sc, function_type, log, &function_type_is_new_pointer); 439 440 if (lldb_function_type_sp) { 441 clang_type = m_ast.CreateBlockPointerType( 442 lldb_function_type_sp->GetForwardCompilerType()); 443 encoding_data_type = Type::eEncodingIsUID; 444 encoding_uid.Clear(); 445 resolve_state = Type::eResolveStateFull; 446 } 447 } 448 449 break; 450 } 451 } 452 } 453 } 454 455 bool translation_unit_is_objc = 456 (sc.comp_unit->GetLanguage() == eLanguageTypeObjC || 457 sc.comp_unit->GetLanguage() == eLanguageTypeObjC_plus_plus); 458 459 if (translation_unit_is_objc) { 460 if (type_name_cstr != NULL) { 461 static ConstString g_objc_type_name_id("id"); 462 static ConstString g_objc_type_name_Class("Class"); 463 static ConstString g_objc_type_name_selector("SEL"); 464 465 if (type_name_const_str == g_objc_type_name_id) { 466 if (log) 467 dwarf->GetObjectFile()->GetModule()->LogMessage( 468 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 469 "is Objective-C 'id' built-in type.", 470 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 471 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 472 encoding_data_type = Type::eEncodingIsUID; 473 encoding_uid.Clear(); 474 resolve_state = Type::eResolveStateFull; 475 476 } else if (type_name_const_str == g_objc_type_name_Class) { 477 if (log) 478 dwarf->GetObjectFile()->GetModule()->LogMessage( 479 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 480 "is Objective-C 'Class' built-in type.", 481 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 482 clang_type = m_ast.GetBasicType(eBasicTypeObjCClass); 483 encoding_data_type = Type::eEncodingIsUID; 484 encoding_uid.Clear(); 485 resolve_state = Type::eResolveStateFull; 486 } else if (type_name_const_str == g_objc_type_name_selector) { 487 if (log) 488 dwarf->GetObjectFile()->GetModule()->LogMessage( 489 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 490 "is Objective-C 'selector' built-in type.", 491 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 492 clang_type = m_ast.GetBasicType(eBasicTypeObjCSel); 493 encoding_data_type = Type::eEncodingIsUID; 494 encoding_uid.Clear(); 495 resolve_state = Type::eResolveStateFull; 496 } 497 } else if (encoding_data_type == Type::eEncodingIsPointerUID && 498 encoding_uid.IsValid()) { 499 // Clang sometimes erroneously emits id as objc_object*. In that 500 // case we fix up the type to "id". 501 502 const DWARFDIE encoding_die = dwarf->GetDIE(DIERef(encoding_uid)); 503 504 if (encoding_die && encoding_die.Tag() == DW_TAG_structure_type) { 505 if (const char *struct_name = encoding_die.GetName()) { 506 if (!strcmp(struct_name, "objc_object")) { 507 if (log) 508 dwarf->GetObjectFile()->GetModule()->LogMessage( 509 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s " 510 "'%s' is 'objc_object*', which we overrode to " 511 "'id'.", 512 die.GetOffset(), die.GetTagAsCString(), 513 die.GetName()); 514 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 515 encoding_data_type = Type::eEncodingIsUID; 516 encoding_uid.Clear(); 517 resolve_state = Type::eResolveStateFull; 518 } 519 } 520 } 521 } 522 } 523 } 524 525 type_sp = std::make_shared<Type>( 526 die.GetID(), dwarf, type_name_const_str, byte_size, nullptr, 527 DIERef(encoding_uid).GetUID(dwarf), encoding_data_type, &decl, 528 clang_type, resolve_state); 529 530 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 531 } break; 532 533 case DW_TAG_structure_type: 534 case DW_TAG_union_type: 535 case DW_TAG_class_type: { 536 // Set a bit that lets us know that we are currently parsing this 537 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 538 539 LanguageType class_language = eLanguageTypeUnknown; 540 bool is_complete_objc_class = false; 541 size_t calling_convention 542 = llvm::dwarf::CallingConvention::DW_CC_normal; 543 544 const size_t num_attributes = die.GetAttributes(attributes); 545 if (num_attributes > 0) { 546 uint32_t i; 547 for (i = 0; i < num_attributes; ++i) { 548 attr = attributes.AttributeAtIndex(i); 549 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 550 switch (attr) { 551 case DW_AT_decl_file: 552 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 553 form_value.Unsigned())); 554 break; 555 556 case DW_AT_decl_line: 557 decl.SetLine(form_value.Unsigned()); 558 break; 559 560 case DW_AT_decl_column: 561 decl.SetColumn(form_value.Unsigned()); 562 break; 563 564 case DW_AT_name: 565 type_name_cstr = form_value.AsCString(); 566 type_name_const_str.SetCString(type_name_cstr); 567 break; 568 569 case DW_AT_byte_size: 570 byte_size = form_value.Unsigned(); 571 break; 572 573 case DW_AT_accessibility: 574 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 575 break; 576 577 case DW_AT_declaration: 578 is_forward_declaration = form_value.Boolean(); 579 break; 580 581 case DW_AT_APPLE_runtime_class: 582 class_language = (LanguageType)form_value.Signed(); 583 break; 584 585 case DW_AT_APPLE_objc_complete_type: 586 is_complete_objc_class = form_value.Signed(); 587 break; 588 case DW_AT_calling_convention: 589 calling_convention = form_value.Unsigned(); 590 break; 591 592 case DW_AT_allocated: 593 case DW_AT_associated: 594 case DW_AT_data_location: 595 case DW_AT_description: 596 case DW_AT_start_scope: 597 case DW_AT_visibility: 598 default: 599 case DW_AT_sibling: 600 break; 601 } 602 } 603 } 604 } 605 606 // UniqueDWARFASTType is large, so don't create a local variables on 607 // the stack, put it on the heap. This function is often called 608 // recursively and clang isn't good and sharing the stack space for 609 // variables in different blocks. 610 std::unique_ptr<UniqueDWARFASTType> unique_ast_entry_up( 611 new UniqueDWARFASTType()); 612 613 ConstString unique_typename(type_name_const_str); 614 Declaration unique_decl(decl); 615 616 if (type_name_const_str) { 617 LanguageType die_language = die.GetLanguage(); 618 if (Language::LanguageIsCPlusPlus(die_language)) { 619 // For C++, we rely solely upon the one definition rule that says 620 // only one thing can exist at a given decl context. We ignore the 621 // file and line that things are declared on. 622 std::string qualified_name; 623 if (die.GetQualifiedName(qualified_name)) 624 unique_typename = ConstString(qualified_name); 625 unique_decl.Clear(); 626 } 627 628 if (dwarf->GetUniqueDWARFASTTypeMap().Find( 629 unique_typename, die, unique_decl, 630 byte_size ? *byte_size : -1, *unique_ast_entry_up)) { 631 type_sp = unique_ast_entry_up->m_type_sp; 632 if (type_sp) { 633 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 634 return type_sp; 635 } 636 } 637 } 638 639 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 640 DW_TAG_value_to_name(tag), type_name_cstr); 641 642 int tag_decl_kind = -1; 643 AccessType default_accessibility = eAccessNone; 644 if (tag == DW_TAG_structure_type) { 645 tag_decl_kind = clang::TTK_Struct; 646 default_accessibility = eAccessPublic; 647 } else if (tag == DW_TAG_union_type) { 648 tag_decl_kind = clang::TTK_Union; 649 default_accessibility = eAccessPublic; 650 } else if (tag == DW_TAG_class_type) { 651 tag_decl_kind = clang::TTK_Class; 652 default_accessibility = eAccessPrivate; 653 } 654 655 if (byte_size && *byte_size == 0 && type_name_cstr && 656 !die.HasChildren() && 657 sc.comp_unit->GetLanguage() == eLanguageTypeObjC) { 658 // Work around an issue with clang at the moment where forward 659 // declarations for objective C classes are emitted as: 660 // DW_TAG_structure_type [2] 661 // DW_AT_name( "ForwardObjcClass" ) 662 // DW_AT_byte_size( 0x00 ) 663 // DW_AT_decl_file( "..." ) 664 // DW_AT_decl_line( 1 ) 665 // 666 // Note that there is no DW_AT_declaration and there are no children, 667 // and the byte size is zero. 668 is_forward_declaration = true; 669 } 670 671 if (class_language == eLanguageTypeObjC || 672 class_language == eLanguageTypeObjC_plus_plus) { 673 if (!is_complete_objc_class && 674 die.Supports_DW_AT_APPLE_objc_complete_type()) { 675 // We have a valid eSymbolTypeObjCClass class symbol whose name 676 // matches the current objective C class that we are trying to find 677 // and this DIE isn't the complete definition (we checked 678 // is_complete_objc_class above and know it is false), so the real 679 // definition is in here somewhere 680 type_sp = dwarf->FindCompleteObjCDefinitionTypeForDIE( 681 die, type_name_const_str, true); 682 683 if (!type_sp) { 684 SymbolFileDWARFDebugMap *debug_map_symfile = 685 dwarf->GetDebugMapSymfile(); 686 if (debug_map_symfile) { 687 // We weren't able to find a full declaration in this DWARF, 688 // see if we have a declaration anywhere else... 689 type_sp = 690 debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE( 691 die, type_name_const_str, true); 692 } 693 } 694 695 if (type_sp) { 696 if (log) { 697 dwarf->GetObjectFile()->GetModule()->LogMessage( 698 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is an " 699 "incomplete objc type, complete type is 0x%8.8" PRIx64, 700 static_cast<void *>(this), die.GetOffset(), 701 DW_TAG_value_to_name(tag), type_name_cstr, 702 type_sp->GetID()); 703 } 704 705 // We found a real definition for this type elsewhere so lets use 706 // it and cache the fact that we found a complete type for this 707 // die 708 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 709 return type_sp; 710 } 711 } 712 } 713 714 if (is_forward_declaration) { 715 // We have a forward declaration to a type and we need to try and 716 // find a full declaration. We look in the current type index just in 717 // case we have a forward declaration followed by an actual 718 // declarations in the DWARF. If this fails, we need to look 719 // elsewhere... 720 if (log) { 721 dwarf->GetObjectFile()->GetModule()->LogMessage( 722 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 723 "forward declaration, trying to find complete type", 724 static_cast<void *>(this), die.GetOffset(), 725 DW_TAG_value_to_name(tag), type_name_cstr); 726 } 727 728 // See if the type comes from a DWO module and if so, track down that 729 // type. 730 type_sp = ParseTypeFromDWO(die, log); 731 if (type_sp) 732 return type_sp; 733 734 DWARFDeclContext die_decl_ctx; 735 die.GetDWARFDeclContext(die_decl_ctx); 736 737 // type_sp = FindDefinitionTypeForDIE (dwarf_cu, die, 738 // type_name_const_str); 739 type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx); 740 741 if (!type_sp) { 742 SymbolFileDWARFDebugMap *debug_map_symfile = 743 dwarf->GetDebugMapSymfile(); 744 if (debug_map_symfile) { 745 // We weren't able to find a full declaration in this DWARF, see 746 // if we have a declaration anywhere else... 747 type_sp = 748 debug_map_symfile->FindDefinitionTypeForDWARFDeclContext( 749 die_decl_ctx); 750 } 751 } 752 753 if (type_sp) { 754 if (log) { 755 dwarf->GetObjectFile()->GetModule()->LogMessage( 756 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 757 "forward declaration, complete type is 0x%8.8" PRIx64, 758 static_cast<void *>(this), die.GetOffset(), 759 DW_TAG_value_to_name(tag), type_name_cstr, type_sp->GetID()); 760 } 761 762 // We found a real definition for this type elsewhere so lets use 763 // it and cache the fact that we found a complete type for this die 764 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 765 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE( 766 dwarf->DebugInfo()->GetDIE(DIERef(type_sp->GetID(), dwarf))); 767 if (defn_decl_ctx) 768 LinkDeclContextToDIE(defn_decl_ctx, die); 769 return type_sp; 770 } 771 } 772 assert(tag_decl_kind != -1); 773 bool clang_type_was_created = false; 774 clang_type.SetCompilerType( 775 &m_ast, dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE())); 776 if (!clang_type) { 777 clang::DeclContext *decl_ctx = 778 GetClangDeclContextContainingDIE(die, nullptr); 779 780 // If your decl context is a record that was imported from another 781 // AST context (in the gmodules case), we need to make sure the type 782 // backing the Decl is complete before adding children to it. This is 783 // not an issue in the non-gmodules case because the debug info will 784 // always contain a full definition of parent types in that case. 785 CompleteExternalTagDeclType(GetClangASTImporter(), decl_ctx, die, 786 type_name_cstr); 787 788 if (accessibility == eAccessNone && decl_ctx) { 789 // Check the decl context that contains this class/struct/union. If 790 // it is a class we must give it an accessibility. 791 const clang::Decl::Kind containing_decl_kind = 792 decl_ctx->getDeclKind(); 793 if (DeclKindIsCXXClass(containing_decl_kind)) 794 accessibility = default_accessibility; 795 } 796 797 ClangASTMetadata metadata; 798 metadata.SetUserID(die.GetID()); 799 metadata.SetIsDynamicCXXType(dwarf->ClassOrStructIsVirtual(die)); 800 801 if (type_name_cstr && strchr(type_name_cstr, '<')) { 802 ClangASTContext::TemplateParameterInfos template_param_infos; 803 if (ParseTemplateParameterInfos(die, template_param_infos)) { 804 clang::ClassTemplateDecl *class_template_decl = 805 m_ast.ParseClassTemplateDecl(decl_ctx, accessibility, 806 type_name_cstr, tag_decl_kind, 807 template_param_infos); 808 if (!class_template_decl) { 809 if (log) { 810 dwarf->GetObjectFile()->GetModule()->LogMessage( 811 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" " 812 "clang::ClassTemplateDecl failed to return a decl.", 813 static_cast<void *>(this), die.GetOffset(), 814 DW_TAG_value_to_name(tag), type_name_cstr); 815 } 816 return TypeSP(); 817 } 818 819 clang::ClassTemplateSpecializationDecl 820 *class_specialization_decl = 821 m_ast.CreateClassTemplateSpecializationDecl( 822 decl_ctx, class_template_decl, tag_decl_kind, 823 template_param_infos); 824 clang_type = m_ast.CreateClassTemplateSpecializationType( 825 class_specialization_decl); 826 clang_type_was_created = true; 827 828 m_ast.SetMetadata(class_template_decl, metadata); 829 m_ast.SetMetadata(class_specialization_decl, metadata); 830 } 831 } 832 833 if (!clang_type_was_created) { 834 clang_type_was_created = true; 835 clang_type = m_ast.CreateRecordType(decl_ctx, accessibility, 836 type_name_cstr, tag_decl_kind, 837 class_language, &metadata); 838 } 839 } 840 841 // Store a forward declaration to this class type in case any 842 // parameters in any class methods need it for the clang types for 843 // function prototypes. 844 LinkDeclContextToDIE(m_ast.GetDeclContextForType(clang_type), die); 845 type_sp = std::make_shared<Type>( 846 die.GetID(), dwarf, type_name_const_str, byte_size, nullptr, 847 LLDB_INVALID_UID, Type::eEncodingIsUID, &decl, clang_type, 848 Type::eResolveStateForward); 849 850 type_sp->SetIsCompleteObjCClass(is_complete_objc_class); 851 852 // Add our type to the unique type map so we don't end up creating many 853 // copies of the same type over and over in the ASTContext for our 854 // module 855 unique_ast_entry_up->m_type_sp = type_sp; 856 unique_ast_entry_up->m_die = die; 857 unique_ast_entry_up->m_declaration = unique_decl; 858 unique_ast_entry_up->m_byte_size = byte_size.getValueOr(0); 859 dwarf->GetUniqueDWARFASTTypeMap().Insert(unique_typename, 860 *unique_ast_entry_up); 861 862 if (is_forward_declaration && die.HasChildren()) { 863 // Check to see if the DIE actually has a definition, some version of 864 // GCC will 865 // emit DIEs with DW_AT_declaration set to true, but yet still have 866 // subprogram, members, or inheritance, so we can't trust it 867 DWARFDIE child_die = die.GetFirstChild(); 868 while (child_die) { 869 switch (child_die.Tag()) { 870 case DW_TAG_inheritance: 871 case DW_TAG_subprogram: 872 case DW_TAG_member: 873 case DW_TAG_APPLE_property: 874 case DW_TAG_class_type: 875 case DW_TAG_structure_type: 876 case DW_TAG_enumeration_type: 877 case DW_TAG_typedef: 878 case DW_TAG_union_type: 879 child_die.Clear(); 880 is_forward_declaration = false; 881 break; 882 default: 883 child_die = child_die.GetSibling(); 884 break; 885 } 886 } 887 } 888 889 if (!is_forward_declaration) { 890 // Always start the definition for a class type so that if the class 891 // has child classes or types that require the class to be created 892 // for use as their decl contexts the class will be ready to accept 893 // these child definitions. 894 if (!die.HasChildren()) { 895 // No children for this struct/union/class, lets finish it 896 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 897 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 898 } else { 899 dwarf->GetObjectFile()->GetModule()->ReportError( 900 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 901 "definition.\nPlease file a bug and attach the file at the " 902 "start of this error message", 903 die.GetOffset(), type_name_cstr); 904 } 905 906 if (tag == DW_TAG_structure_type) // this only applies in C 907 { 908 clang::RecordDecl *record_decl = 909 ClangASTContext::GetAsRecordDecl(clang_type); 910 911 if (record_decl) { 912 GetClangASTImporter().InsertRecordDecl( 913 record_decl, ClangASTImporter::LayoutInfo()); 914 } 915 } 916 } else if (clang_type_was_created) { 917 // Start the definition if the class is not objective C since the 918 // underlying decls respond to isCompleteDefinition(). Objective 919 // C decls don't respond to isCompleteDefinition() so we can't 920 // start the declaration definition right away. For C++ 921 // class/union/structs we want to start the definition in case the 922 // class is needed as the declaration context for a contained class 923 // or type without the need to complete that type.. 924 925 if (class_language != eLanguageTypeObjC && 926 class_language != eLanguageTypeObjC_plus_plus) 927 ClangASTContext::StartTagDeclarationDefinition(clang_type); 928 929 // Leave this as a forward declaration until we need to know the 930 // details of the type. lldb_private::Type will automatically call 931 // the SymbolFile virtual function 932 // "SymbolFileDWARF::CompleteType(Type *)" When the definition 933 // needs to be defined. 934 assert(!dwarf->GetForwardDeclClangTypeToDie().count( 935 ClangUtil::RemoveFastQualifiers(clang_type) 936 .GetOpaqueQualType()) && 937 "Type already in the forward declaration map!"); 938 // Can't assume m_ast.GetSymbolFile() is actually a 939 // SymbolFileDWARF, it can be a SymbolFileDWARFDebugMap for Apple 940 // binaries. 941 dwarf->GetForwardDeclDieToClangType()[die.GetDIE()] = 942 clang_type.GetOpaqueQualType(); 943 dwarf->GetForwardDeclClangTypeToDie() 944 [ClangUtil::RemoveFastQualifiers(clang_type) 945 .GetOpaqueQualType()] = die.GetDIERef(); 946 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), true); 947 } 948 } 949 950 // If we made a clang type, set the trivial abi if applicable: We only 951 // do this for pass by value - which implies the Trivial ABI. There 952 // isn't a way to assert that something that would normally be pass by 953 // value is pass by reference, so we ignore that attribute if set. 954 if (calling_convention == llvm::dwarf::DW_CC_pass_by_value) { 955 clang::CXXRecordDecl *record_decl = 956 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 957 if (record_decl) { 958 record_decl->setHasTrivialSpecialMemberForCall(); 959 } 960 } 961 962 } break; 963 964 case DW_TAG_enumeration_type: { 965 // Set a bit that lets us know that we are currently parsing this 966 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 967 968 bool is_scoped = false; 969 DWARFFormValue encoding_form; 970 971 const size_t num_attributes = die.GetAttributes(attributes); 972 if (num_attributes > 0) { 973 uint32_t i; 974 975 for (i = 0; i < num_attributes; ++i) { 976 attr = attributes.AttributeAtIndex(i); 977 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 978 switch (attr) { 979 case DW_AT_decl_file: 980 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 981 form_value.Unsigned())); 982 break; 983 case DW_AT_decl_line: 984 decl.SetLine(form_value.Unsigned()); 985 break; 986 case DW_AT_decl_column: 987 decl.SetColumn(form_value.Unsigned()); 988 break; 989 case DW_AT_name: 990 type_name_cstr = form_value.AsCString(); 991 type_name_const_str.SetCString(type_name_cstr); 992 break; 993 case DW_AT_type: 994 encoding_form = form_value; 995 break; 996 case DW_AT_byte_size: 997 byte_size = form_value.Unsigned(); 998 break; 999 case DW_AT_accessibility: 1000 break; // accessibility = 1001 // DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 1002 case DW_AT_declaration: 1003 is_forward_declaration = form_value.Boolean(); 1004 break; 1005 case DW_AT_enum_class: 1006 is_scoped = form_value.Boolean(); 1007 break; 1008 case DW_AT_allocated: 1009 case DW_AT_associated: 1010 case DW_AT_bit_stride: 1011 case DW_AT_byte_stride: 1012 case DW_AT_data_location: 1013 case DW_AT_description: 1014 case DW_AT_start_scope: 1015 case DW_AT_visibility: 1016 case DW_AT_specification: 1017 case DW_AT_abstract_origin: 1018 case DW_AT_sibling: 1019 break; 1020 } 1021 } 1022 } 1023 1024 if (is_forward_declaration) { 1025 type_sp = ParseTypeFromDWO(die, log); 1026 if (type_sp) 1027 return type_sp; 1028 1029 DWARFDeclContext die_decl_ctx; 1030 die.GetDWARFDeclContext(die_decl_ctx); 1031 1032 type_sp = 1033 dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx); 1034 1035 if (!type_sp) { 1036 SymbolFileDWARFDebugMap *debug_map_symfile = 1037 dwarf->GetDebugMapSymfile(); 1038 if (debug_map_symfile) { 1039 // We weren't able to find a full declaration in this DWARF, 1040 // see if we have a declaration anywhere else... 1041 type_sp = 1042 debug_map_symfile->FindDefinitionTypeForDWARFDeclContext( 1043 die_decl_ctx); 1044 } 1045 } 1046 1047 if (type_sp) { 1048 if (log) { 1049 dwarf->GetObjectFile()->GetModule()->LogMessage( 1050 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 1051 "forward declaration, complete type is 0x%8.8" PRIx64, 1052 static_cast<void *>(this), die.GetOffset(), 1053 DW_TAG_value_to_name(tag), type_name_cstr, 1054 type_sp->GetID()); 1055 } 1056 1057 // We found a real definition for this type elsewhere so lets use 1058 // it and cache the fact that we found a complete type for this 1059 // die 1060 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1061 clang::DeclContext *defn_decl_ctx = 1062 GetCachedClangDeclContextForDIE(dwarf->DebugInfo()->GetDIE( 1063 DIERef(type_sp->GetID(), dwarf))); 1064 if (defn_decl_ctx) 1065 LinkDeclContextToDIE(defn_decl_ctx, die); 1066 return type_sp; 1067 } 1068 } 1069 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1070 DW_TAG_value_to_name(tag), type_name_cstr); 1071 1072 CompilerType enumerator_clang_type; 1073 clang_type.SetCompilerType( 1074 &m_ast, 1075 dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE())); 1076 if (!clang_type) { 1077 if (encoding_form.IsValid()) { 1078 Type *enumerator_type = 1079 dwarf->ResolveTypeUID(DIERef(encoding_form)); 1080 if (enumerator_type) 1081 enumerator_clang_type = enumerator_type->GetFullCompilerType(); 1082 } 1083 1084 if (!enumerator_clang_type) { 1085 if (byte_size) { 1086 enumerator_clang_type = 1087 m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize( 1088 NULL, DW_ATE_signed, *byte_size * 8); 1089 } else { 1090 enumerator_clang_type = m_ast.GetBasicType(eBasicTypeInt); 1091 } 1092 } 1093 1094 clang_type = m_ast.CreateEnumerationType( 1095 type_name_cstr, GetClangDeclContextContainingDIE(die, nullptr), 1096 decl, enumerator_clang_type, is_scoped); 1097 } else { 1098 enumerator_clang_type = 1099 m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType()); 1100 } 1101 1102 LinkDeclContextToDIE( 1103 ClangASTContext::GetDeclContextForType(clang_type), die); 1104 1105 type_sp = std::make_shared<Type>( 1106 die.GetID(), dwarf, type_name_const_str, byte_size, nullptr, 1107 DIERef(encoding_form).GetUID(dwarf), Type::eEncodingIsUID, &decl, 1108 clang_type, Type::eResolveStateForward); 1109 1110 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 1111 if (die.HasChildren()) { 1112 SymbolContext cu_sc(die.GetLLDBCompileUnit()); 1113 bool is_signed = false; 1114 enumerator_clang_type.IsIntegerType(is_signed); 1115 ParseChildEnumerators(cu_sc, clang_type, is_signed, 1116 type_sp->GetByteSize().getValueOr(0), die); 1117 } 1118 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 1119 } else { 1120 dwarf->GetObjectFile()->GetModule()->ReportError( 1121 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 1122 "definition.\nPlease file a bug and attach the file at the " 1123 "start of this error message", 1124 die.GetOffset(), type_name_cstr); 1125 } 1126 } 1127 } break; 1128 1129 case DW_TAG_inlined_subroutine: 1130 case DW_TAG_subprogram: 1131 case DW_TAG_subroutine_type: { 1132 // Set a bit that lets us know that we are currently parsing this 1133 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1134 1135 DWARFFormValue type_die_form; 1136 bool is_variadic = false; 1137 bool is_inline = false; 1138 bool is_static = false; 1139 bool is_virtual = false; 1140 bool is_explicit = false; 1141 bool is_artificial = false; 1142 bool has_template_params = false; 1143 DWARFFormValue specification_die_form; 1144 DWARFFormValue abstract_origin_die_form; 1145 dw_offset_t object_pointer_die_offset = DW_INVALID_OFFSET; 1146 1147 unsigned type_quals = 0; 1148 clang::StorageClass storage = 1149 clang::SC_None; //, Extern, Static, PrivateExtern 1150 1151 const size_t num_attributes = die.GetAttributes(attributes); 1152 if (num_attributes > 0) { 1153 uint32_t i; 1154 for (i = 0; i < num_attributes; ++i) { 1155 attr = attributes.AttributeAtIndex(i); 1156 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1157 switch (attr) { 1158 case DW_AT_decl_file: 1159 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 1160 form_value.Unsigned())); 1161 break; 1162 case DW_AT_decl_line: 1163 decl.SetLine(form_value.Unsigned()); 1164 break; 1165 case DW_AT_decl_column: 1166 decl.SetColumn(form_value.Unsigned()); 1167 break; 1168 case DW_AT_name: 1169 type_name_cstr = form_value.AsCString(); 1170 type_name_const_str.SetCString(type_name_cstr); 1171 break; 1172 1173 case DW_AT_linkage_name: 1174 case DW_AT_MIPS_linkage_name: 1175 mangled_name_cstr = form_value.AsCString(); 1176 break; 1177 case DW_AT_type: 1178 type_die_form = form_value; 1179 break; 1180 case DW_AT_accessibility: 1181 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 1182 break; 1183 case DW_AT_declaration: 1184 break; // is_forward_declaration = form_value.Boolean(); break; 1185 case DW_AT_inline: 1186 is_inline = form_value.Boolean(); 1187 break; 1188 case DW_AT_virtuality: 1189 is_virtual = form_value.Boolean(); 1190 break; 1191 case DW_AT_explicit: 1192 is_explicit = form_value.Boolean(); 1193 break; 1194 case DW_AT_artificial: 1195 is_artificial = form_value.Boolean(); 1196 break; 1197 1198 case DW_AT_external: 1199 if (form_value.Unsigned()) { 1200 if (storage == clang::SC_None) 1201 storage = clang::SC_Extern; 1202 else 1203 storage = clang::SC_PrivateExtern; 1204 } 1205 break; 1206 1207 case DW_AT_specification: 1208 specification_die_form = form_value; 1209 break; 1210 1211 case DW_AT_abstract_origin: 1212 abstract_origin_die_form = form_value; 1213 break; 1214 1215 case DW_AT_object_pointer: 1216 object_pointer_die_offset = form_value.Reference(); 1217 break; 1218 1219 case DW_AT_allocated: 1220 case DW_AT_associated: 1221 case DW_AT_address_class: 1222 case DW_AT_calling_convention: 1223 case DW_AT_data_location: 1224 case DW_AT_elemental: 1225 case DW_AT_entry_pc: 1226 case DW_AT_frame_base: 1227 case DW_AT_high_pc: 1228 case DW_AT_low_pc: 1229 case DW_AT_prototyped: 1230 case DW_AT_pure: 1231 case DW_AT_ranges: 1232 case DW_AT_recursive: 1233 case DW_AT_return_addr: 1234 case DW_AT_segment: 1235 case DW_AT_start_scope: 1236 case DW_AT_static_link: 1237 case DW_AT_trampoline: 1238 case DW_AT_visibility: 1239 case DW_AT_vtable_elem_location: 1240 case DW_AT_description: 1241 case DW_AT_sibling: 1242 break; 1243 } 1244 } 1245 } 1246 } 1247 1248 std::string object_pointer_name; 1249 if (object_pointer_die_offset != DW_INVALID_OFFSET) { 1250 DWARFDIE object_pointer_die = die.GetDIE(object_pointer_die_offset); 1251 if (object_pointer_die) { 1252 const char *object_pointer_name_cstr = object_pointer_die.GetName(); 1253 if (object_pointer_name_cstr) 1254 object_pointer_name = object_pointer_name_cstr; 1255 } 1256 } 1257 1258 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1259 DW_TAG_value_to_name(tag), type_name_cstr); 1260 1261 CompilerType return_clang_type; 1262 Type *func_type = NULL; 1263 1264 if (type_die_form.IsValid()) 1265 func_type = dwarf->ResolveTypeUID(DIERef(type_die_form)); 1266 1267 if (func_type) 1268 return_clang_type = func_type->GetForwardCompilerType(); 1269 else 1270 return_clang_type = m_ast.GetBasicType(eBasicTypeVoid); 1271 1272 std::vector<CompilerType> function_param_types; 1273 std::vector<clang::ParmVarDecl *> function_param_decls; 1274 1275 // Parse the function children for the parameters 1276 1277 DWARFDIE decl_ctx_die; 1278 clang::DeclContext *containing_decl_ctx = 1279 GetClangDeclContextContainingDIE(die, &decl_ctx_die); 1280 const clang::Decl::Kind containing_decl_kind = 1281 containing_decl_ctx->getDeclKind(); 1282 1283 bool is_cxx_method = DeclKindIsCXXClass(containing_decl_kind); 1284 // Start off static. This will be set to false in 1285 // ParseChildParameters(...) if we find a "this" parameters as the 1286 // first parameter 1287 if (is_cxx_method) { 1288 is_static = true; 1289 } 1290 1291 if (die.HasChildren()) { 1292 bool skip_artificial = true; 1293 ParseChildParameters(*sc.comp_unit, containing_decl_ctx, die, 1294 skip_artificial, is_static, is_variadic, 1295 has_template_params, function_param_types, 1296 function_param_decls, type_quals); 1297 } 1298 1299 bool ignore_containing_context = false; 1300 // Check for templatized class member functions. If we had any 1301 // DW_TAG_template_type_parameter or DW_TAG_template_value_parameter 1302 // the DW_TAG_subprogram DIE, then we can't let this become a method in 1303 // a class. Why? Because templatized functions are only emitted if one 1304 // of the templatized methods is used in the current compile unit and 1305 // we will end up with classes that may or may not include these member 1306 // functions and this means one class won't match another class 1307 // definition and it affects our ability to use a class in the clang 1308 // expression parser. So for the greater good, we currently must not 1309 // allow any template member functions in a class definition. 1310 if (is_cxx_method && has_template_params) { 1311 ignore_containing_context = true; 1312 is_cxx_method = false; 1313 } 1314 1315 // clang_type will get the function prototype clang type after this 1316 // call 1317 clang_type = m_ast.CreateFunctionType( 1318 return_clang_type, function_param_types.data(), 1319 function_param_types.size(), is_variadic, type_quals); 1320 1321 if (type_name_cstr) { 1322 bool type_handled = false; 1323 if (tag == DW_TAG_subprogram || tag == DW_TAG_inlined_subroutine) { 1324 ObjCLanguage::MethodName objc_method(type_name_cstr, true); 1325 if (objc_method.IsValid(true)) { 1326 CompilerType class_opaque_type; 1327 ConstString class_name(objc_method.GetClassName()); 1328 if (class_name) { 1329 TypeSP complete_objc_class_type_sp( 1330 dwarf->FindCompleteObjCDefinitionTypeForDIE( 1331 DWARFDIE(), class_name, false)); 1332 1333 if (complete_objc_class_type_sp) { 1334 CompilerType type_clang_forward_type = 1335 complete_objc_class_type_sp->GetForwardCompilerType(); 1336 if (ClangASTContext::IsObjCObjectOrInterfaceType( 1337 type_clang_forward_type)) 1338 class_opaque_type = type_clang_forward_type; 1339 } 1340 } 1341 1342 if (class_opaque_type) { 1343 // If accessibility isn't set to anything valid, assume public 1344 // for now... 1345 if (accessibility == eAccessNone) 1346 accessibility = eAccessPublic; 1347 1348 clang::ObjCMethodDecl *objc_method_decl = 1349 m_ast.AddMethodToObjCObjectType( 1350 class_opaque_type, type_name_cstr, clang_type, 1351 accessibility, is_artificial, is_variadic); 1352 type_handled = objc_method_decl != NULL; 1353 if (type_handled) { 1354 LinkDeclContextToDIE( 1355 ClangASTContext::GetAsDeclContext(objc_method_decl), die); 1356 m_ast.SetMetadataAsUserID(objc_method_decl, die.GetID()); 1357 } else { 1358 dwarf->GetObjectFile()->GetModule()->ReportError( 1359 "{0x%8.8x}: invalid Objective-C method 0x%4.4x (%s), " 1360 "please file a bug and attach the file at the start of " 1361 "this error message", 1362 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 1363 } 1364 } 1365 } else if (is_cxx_method) { 1366 // Look at the parent of this DIE and see if is is a class or 1367 // struct and see if this is actually a C++ method 1368 Type *class_type = dwarf->ResolveType(decl_ctx_die); 1369 if (class_type) { 1370 bool alternate_defn = false; 1371 if (class_type->GetID() != decl_ctx_die.GetID() || 1372 decl_ctx_die.GetContainingDWOModuleDIE()) { 1373 alternate_defn = true; 1374 1375 // We uniqued the parent class of this function to another 1376 // class so we now need to associate all dies under 1377 // "decl_ctx_die" to DIEs in the DIE for "class_type"... 1378 SymbolFileDWARF *class_symfile = NULL; 1379 DWARFDIE class_type_die; 1380 1381 SymbolFileDWARFDebugMap *debug_map_symfile = 1382 dwarf->GetDebugMapSymfile(); 1383 if (debug_map_symfile) { 1384 class_symfile = debug_map_symfile->GetSymbolFileByOSOIndex( 1385 SymbolFileDWARFDebugMap::GetOSOIndexFromUserID( 1386 class_type->GetID())); 1387 class_type_die = class_symfile->DebugInfo()->GetDIE( 1388 DIERef(class_type->GetID(), dwarf)); 1389 } else { 1390 class_symfile = dwarf; 1391 class_type_die = dwarf->DebugInfo()->GetDIE( 1392 DIERef(class_type->GetID(), dwarf)); 1393 } 1394 if (class_type_die) { 1395 std::vector<DWARFDIE> failures; 1396 1397 CopyUniqueClassMethodTypes(decl_ctx_die, class_type_die, 1398 class_type, failures); 1399 1400 // FIXME do something with these failures that's smarter 1401 // than 1402 // just dropping them on the ground. Unfortunately classes 1403 // don't like having stuff added to them after their 1404 // definitions are complete... 1405 1406 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1407 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1408 type_sp = type_ptr->shared_from_this(); 1409 break; 1410 } 1411 } 1412 } 1413 1414 if (specification_die_form.IsValid()) { 1415 // We have a specification which we are going to base our 1416 // function prototype off of, so we need this type to be 1417 // completed so that the m_die_to_decl_ctx for the method in 1418 // the specification has a valid clang decl context. 1419 class_type->GetForwardCompilerType(); 1420 // If we have a specification, then the function type should 1421 // have been made with the specification and not with this 1422 // die. 1423 DWARFDIE spec_die = dwarf->DebugInfo()->GetDIE( 1424 DIERef(specification_die_form)); 1425 clang::DeclContext *spec_clang_decl_ctx = 1426 GetClangDeclContextForDIE(spec_die); 1427 if (spec_clang_decl_ctx) { 1428 LinkDeclContextToDIE(spec_clang_decl_ctx, die); 1429 } else { 1430 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1431 "0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8" PRIx64 1432 ") has no decl\n", 1433 die.GetID(), specification_die_form.Reference()); 1434 } 1435 type_handled = true; 1436 } else if (abstract_origin_die_form.IsValid()) { 1437 // We have a specification which we are going to base our 1438 // function prototype off of, so we need this type to be 1439 // completed so that the m_die_to_decl_ctx for the method in 1440 // the abstract origin has a valid clang decl context. 1441 class_type->GetForwardCompilerType(); 1442 1443 DWARFDIE abs_die = dwarf->DebugInfo()->GetDIE( 1444 DIERef(abstract_origin_die_form)); 1445 clang::DeclContext *abs_clang_decl_ctx = 1446 GetClangDeclContextForDIE(abs_die); 1447 if (abs_clang_decl_ctx) { 1448 LinkDeclContextToDIE(abs_clang_decl_ctx, die); 1449 } else { 1450 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1451 "0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8" PRIx64 1452 ") has no decl\n", 1453 die.GetID(), abstract_origin_die_form.Reference()); 1454 } 1455 type_handled = true; 1456 } else { 1457 CompilerType class_opaque_type = 1458 class_type->GetForwardCompilerType(); 1459 if (ClangASTContext::IsCXXClassType(class_opaque_type)) { 1460 if (class_opaque_type.IsBeingDefined() || alternate_defn) { 1461 if (!is_static && !die.HasChildren()) { 1462 // We have a C++ member function with no children (this 1463 // pointer!) and clang will get mad if we try and make 1464 // a function that isn't well formed in the DWARF, so 1465 // we will just skip it... 1466 type_handled = true; 1467 } else { 1468 bool add_method = true; 1469 if (alternate_defn) { 1470 // If an alternate definition for the class exists, 1471 // then add the method only if an equivalent is not 1472 // already present. 1473 clang::CXXRecordDecl *record_decl = 1474 m_ast.GetAsCXXRecordDecl( 1475 class_opaque_type.GetOpaqueQualType()); 1476 if (record_decl) { 1477 for (auto method_iter = record_decl->method_begin(); 1478 method_iter != record_decl->method_end(); 1479 method_iter++) { 1480 clang::CXXMethodDecl *method_decl = *method_iter; 1481 if (method_decl->getNameInfo().getAsString() == 1482 std::string(type_name_cstr)) { 1483 if (method_decl->getType() == 1484 ClangUtil::GetQualType(clang_type)) { 1485 add_method = false; 1486 LinkDeclContextToDIE( 1487 ClangASTContext::GetAsDeclContext( 1488 method_decl), 1489 die); 1490 type_handled = true; 1491 1492 break; 1493 } 1494 } 1495 } 1496 } 1497 } 1498 1499 if (add_method) { 1500 llvm::PrettyStackTraceFormat stack_trace( 1501 "SymbolFileDWARF::ParseType() is adding a method " 1502 "%s to class %s in DIE 0x%8.8" PRIx64 " from %s", 1503 type_name_cstr, 1504 class_type->GetName().GetCString(), die.GetID(), 1505 dwarf->GetObjectFile() 1506 ->GetFileSpec() 1507 .GetPath() 1508 .c_str()); 1509 1510 const bool is_attr_used = false; 1511 // Neither GCC 4.2 nor clang++ currently set a valid 1512 // accessibility in the DWARF for C++ methods... 1513 // Default to public for now... 1514 if (accessibility == eAccessNone) 1515 accessibility = eAccessPublic; 1516 1517 clang::CXXMethodDecl *cxx_method_decl = 1518 m_ast.AddMethodToCXXRecordType( 1519 class_opaque_type.GetOpaqueQualType(), 1520 type_name_cstr, mangled_name_cstr, clang_type, 1521 accessibility, is_virtual, is_static, 1522 is_inline, is_explicit, is_attr_used, 1523 is_artificial); 1524 1525 type_handled = cxx_method_decl != NULL; 1526 1527 if (type_handled) { 1528 LinkDeclContextToDIE( 1529 ClangASTContext::GetAsDeclContext( 1530 cxx_method_decl), 1531 die); 1532 1533 ClangASTMetadata metadata; 1534 metadata.SetUserID(die.GetID()); 1535 1536 if (!object_pointer_name.empty()) { 1537 metadata.SetObjectPtrName( 1538 object_pointer_name.c_str()); 1539 if (log) 1540 log->Printf( 1541 "Setting object pointer name: %s on method " 1542 "object %p.\n", 1543 object_pointer_name.c_str(), 1544 static_cast<void *>(cxx_method_decl)); 1545 } 1546 m_ast.SetMetadata(cxx_method_decl, metadata); 1547 } else { 1548 ignore_containing_context = true; 1549 } 1550 } 1551 } 1552 } else { 1553 // We were asked to parse the type for a method in a 1554 // class, yet the class hasn't been asked to complete 1555 // itself through the clang::ExternalASTSource protocol, 1556 // so we need to just have the class complete itself and 1557 // do things the right way, then our 1558 // DIE should then have an entry in the 1559 // dwarf->GetDIEToType() map. First 1560 // we need to modify the dwarf->GetDIEToType() so it 1561 // doesn't think we are trying to parse this DIE 1562 // anymore... 1563 dwarf->GetDIEToType()[die.GetDIE()] = NULL; 1564 1565 // Now we get the full type to force our class type to 1566 // complete itself using the clang::ExternalASTSource 1567 // protocol which will parse all base classes and all 1568 // methods (including the method for this DIE). 1569 class_type->GetFullCompilerType(); 1570 1571 // The type for this DIE should have been filled in the 1572 // function call above 1573 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1574 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1575 type_sp = type_ptr->shared_from_this(); 1576 break; 1577 } 1578 1579 // FIXME This is fixing some even uglier behavior but we 1580 // really need to 1581 // uniq the methods of each class as well as the class 1582 // itself. <rdar://problem/11240464> 1583 type_handled = true; 1584 } 1585 } 1586 } 1587 } 1588 } 1589 } 1590 1591 if (!type_handled) { 1592 clang::FunctionDecl *function_decl = nullptr; 1593 clang::FunctionDecl *template_function_decl = nullptr; 1594 1595 if (abstract_origin_die_form.IsValid()) { 1596 DWARFDIE abs_die = 1597 dwarf->DebugInfo()->GetDIE(DIERef(abstract_origin_die_form)); 1598 1599 SymbolContext sc; 1600 1601 if (dwarf->ResolveType(abs_die)) { 1602 function_decl = llvm::dyn_cast_or_null<clang::FunctionDecl>( 1603 GetCachedClangDeclContextForDIE(abs_die)); 1604 1605 if (function_decl) { 1606 LinkDeclContextToDIE(function_decl, die); 1607 } 1608 } 1609 } 1610 1611 if (!function_decl) { 1612 // We just have a function that isn't part of a class 1613 function_decl = m_ast.CreateFunctionDeclaration( 1614 ignore_containing_context ? m_ast.GetTranslationUnitDecl() 1615 : containing_decl_ctx, 1616 type_name_cstr, clang_type, storage, is_inline); 1617 1618 if (has_template_params) { 1619 ClangASTContext::TemplateParameterInfos template_param_infos; 1620 ParseTemplateParameterInfos(die, template_param_infos); 1621 template_function_decl = m_ast.CreateFunctionDeclaration( 1622 ignore_containing_context ? m_ast.GetTranslationUnitDecl() 1623 : containing_decl_ctx, 1624 type_name_cstr, clang_type, storage, is_inline); 1625 clang::FunctionTemplateDecl *func_template_decl = 1626 m_ast.CreateFunctionTemplateDecl( 1627 containing_decl_ctx, template_function_decl, 1628 type_name_cstr, template_param_infos); 1629 m_ast.CreateFunctionTemplateSpecializationInfo( 1630 function_decl, func_template_decl, template_param_infos); 1631 } 1632 1633 lldbassert(function_decl); 1634 1635 if (function_decl) { 1636 LinkDeclContextToDIE(function_decl, die); 1637 1638 if (!function_param_decls.empty()) { 1639 m_ast.SetFunctionParameters(function_decl, 1640 &function_param_decls.front(), 1641 function_param_decls.size()); 1642 if (template_function_decl) 1643 m_ast.SetFunctionParameters(template_function_decl, 1644 &function_param_decls.front(), 1645 function_param_decls.size()); 1646 } 1647 1648 ClangASTMetadata metadata; 1649 metadata.SetUserID(die.GetID()); 1650 1651 if (!object_pointer_name.empty()) { 1652 metadata.SetObjectPtrName(object_pointer_name.c_str()); 1653 if (log) 1654 log->Printf("Setting object pointer name: %s on function " 1655 "object %p.", 1656 object_pointer_name.c_str(), 1657 static_cast<void *>(function_decl)); 1658 } 1659 m_ast.SetMetadata(function_decl, metadata); 1660 } 1661 } 1662 } 1663 } 1664 type_sp = std::make_shared<Type>( 1665 die.GetID(), dwarf, type_name_const_str, llvm::None, nullptr, 1666 LLDB_INVALID_UID, Type::eEncodingIsUID, &decl, clang_type, 1667 Type::eResolveStateFull); 1668 assert(type_sp.get()); 1669 } break; 1670 1671 case DW_TAG_array_type: { 1672 // Set a bit that lets us know that we are currently parsing this 1673 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1674 1675 DWARFFormValue type_die_form; 1676 uint32_t byte_stride = 0; 1677 uint32_t bit_stride = 0; 1678 bool is_vector = false; 1679 const size_t num_attributes = die.GetAttributes(attributes); 1680 1681 if (num_attributes > 0) { 1682 uint32_t i; 1683 for (i = 0; i < num_attributes; ++i) { 1684 attr = attributes.AttributeAtIndex(i); 1685 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1686 switch (attr) { 1687 case DW_AT_decl_file: 1688 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 1689 form_value.Unsigned())); 1690 break; 1691 case DW_AT_decl_line: 1692 decl.SetLine(form_value.Unsigned()); 1693 break; 1694 case DW_AT_decl_column: 1695 decl.SetColumn(form_value.Unsigned()); 1696 break; 1697 case DW_AT_name: 1698 type_name_cstr = form_value.AsCString(); 1699 type_name_const_str.SetCString(type_name_cstr); 1700 break; 1701 1702 case DW_AT_type: 1703 type_die_form = form_value; 1704 break; 1705 case DW_AT_byte_size: 1706 break; // byte_size = form_value.Unsigned(); break; 1707 case DW_AT_byte_stride: 1708 byte_stride = form_value.Unsigned(); 1709 break; 1710 case DW_AT_bit_stride: 1711 bit_stride = form_value.Unsigned(); 1712 break; 1713 case DW_AT_GNU_vector: 1714 is_vector = form_value.Boolean(); 1715 break; 1716 case DW_AT_accessibility: 1717 break; // accessibility = 1718 // DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 1719 case DW_AT_declaration: 1720 break; // is_forward_declaration = form_value.Boolean(); break; 1721 case DW_AT_allocated: 1722 case DW_AT_associated: 1723 case DW_AT_data_location: 1724 case DW_AT_description: 1725 case DW_AT_ordering: 1726 case DW_AT_start_scope: 1727 case DW_AT_visibility: 1728 case DW_AT_specification: 1729 case DW_AT_abstract_origin: 1730 case DW_AT_sibling: 1731 break; 1732 } 1733 } 1734 } 1735 1736 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1737 DW_TAG_value_to_name(tag), type_name_cstr); 1738 1739 DIERef type_die_ref(type_die_form); 1740 Type *element_type = dwarf->ResolveTypeUID(type_die_ref); 1741 1742 if (element_type) { 1743 auto array_info = ParseChildArrayInfo(die); 1744 if (array_info) { 1745 byte_stride = array_info->byte_stride; 1746 bit_stride = array_info->bit_stride; 1747 } 1748 if (byte_stride == 0 && bit_stride == 0) 1749 byte_stride = element_type->GetByteSize().getValueOr(0); 1750 CompilerType array_element_type = 1751 element_type->GetForwardCompilerType(); 1752 1753 if (ClangASTContext::IsCXXClassType(array_element_type) && 1754 !array_element_type.GetCompleteType()) { 1755 ModuleSP module_sp = die.GetModule(); 1756 if (module_sp) { 1757 if (die.GetCU()->GetProducer() == eProducerClang) 1758 module_sp->ReportError( 1759 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a " 1760 "class/union/struct element type DIE 0x%8.8x that is a " 1761 "forward declaration, not a complete definition.\nTry " 1762 "compiling the source file with -fstandalone-debug or " 1763 "disable -gmodules", 1764 die.GetOffset(), type_die_ref.die_offset); 1765 else 1766 module_sp->ReportError( 1767 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a " 1768 "class/union/struct element type DIE 0x%8.8x that is a " 1769 "forward declaration, not a complete definition.\nPlease " 1770 "file a bug against the compiler and include the " 1771 "preprocessed output for %s", 1772 die.GetOffset(), type_die_ref.die_offset, 1773 die.GetLLDBCompileUnit() 1774 ? die.GetLLDBCompileUnit()->GetPath().c_str() 1775 : "the source file"); 1776 } 1777 1778 // We have no choice other than to pretend that the element class 1779 // type is complete. If we don't do this, clang will crash when 1780 // trying to layout the class. Since we provide layout 1781 // assistance, all ivars in this class and other classes will be 1782 // fine, this is the best we can do short of crashing. 1783 if (ClangASTContext::StartTagDeclarationDefinition( 1784 array_element_type)) { 1785 ClangASTContext::CompleteTagDeclarationDefinition( 1786 array_element_type); 1787 } else { 1788 module_sp->ReportError("DWARF DIE at 0x%8.8x was not able to " 1789 "start its definition.\nPlease file a " 1790 "bug and attach the file at the start " 1791 "of this error message", 1792 type_die_ref.die_offset); 1793 } 1794 } 1795 1796 uint64_t array_element_bit_stride = byte_stride * 8 + bit_stride; 1797 if (array_info && array_info->element_orders.size() > 0) { 1798 uint64_t num_elements = 0; 1799 auto end = array_info->element_orders.rend(); 1800 for (auto pos = array_info->element_orders.rbegin(); pos != end; 1801 ++pos) { 1802 num_elements = *pos; 1803 clang_type = m_ast.CreateArrayType(array_element_type, 1804 num_elements, is_vector); 1805 array_element_type = clang_type; 1806 array_element_bit_stride = 1807 num_elements ? array_element_bit_stride * num_elements 1808 : array_element_bit_stride; 1809 } 1810 } else { 1811 clang_type = 1812 m_ast.CreateArrayType(array_element_type, 0, is_vector); 1813 } 1814 ConstString empty_name; 1815 type_sp = std::make_shared<Type>( 1816 die.GetID(), dwarf, empty_name, array_element_bit_stride / 8, 1817 nullptr, DIERef(type_die_form).GetUID(dwarf), 1818 Type::eEncodingIsUID, &decl, clang_type, 1819 Type::eResolveStateFull); 1820 type_sp->SetEncodingType(element_type); 1821 m_ast.SetMetadataAsUserID(clang_type.GetOpaqueQualType(), 1822 die.GetID()); 1823 } 1824 } 1825 } break; 1826 1827 case DW_TAG_ptr_to_member_type: { 1828 DWARFFormValue type_die_form; 1829 DWARFFormValue containing_type_die_form; 1830 1831 const size_t num_attributes = die.GetAttributes(attributes); 1832 1833 if (num_attributes > 0) { 1834 uint32_t i; 1835 for (i = 0; i < num_attributes; ++i) { 1836 attr = attributes.AttributeAtIndex(i); 1837 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1838 switch (attr) { 1839 case DW_AT_type: 1840 type_die_form = form_value; 1841 break; 1842 case DW_AT_containing_type: 1843 containing_type_die_form = form_value; 1844 break; 1845 } 1846 } 1847 } 1848 1849 Type *pointee_type = dwarf->ResolveTypeUID(DIERef(type_die_form)); 1850 Type *class_type = 1851 dwarf->ResolveTypeUID(DIERef(containing_type_die_form)); 1852 1853 CompilerType pointee_clang_type = 1854 pointee_type->GetForwardCompilerType(); 1855 CompilerType class_clang_type = class_type->GetLayoutCompilerType(); 1856 1857 clang_type = ClangASTContext::CreateMemberPointerType( 1858 class_clang_type, pointee_clang_type); 1859 1860 if (llvm::Optional<uint64_t> clang_type_size = 1861 clang_type.GetByteSize(nullptr)) { 1862 byte_size = *clang_type_size; 1863 type_sp = std::make_shared<Type>( 1864 die.GetID(), dwarf, type_name_const_str, byte_size, nullptr, 1865 LLDB_INVALID_UID, Type::eEncodingIsUID, nullptr, clang_type, 1866 Type::eResolveStateForward); 1867 } 1868 } 1869 1870 break; 1871 } 1872 default: 1873 dwarf->GetObjectFile()->GetModule()->ReportError( 1874 "{0x%8.8x}: unhandled type tag 0x%4.4x (%s), please file a bug and " 1875 "attach the file at the start of this error message", 1876 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 1877 break; 1878 } 1879 1880 if (type_sp.get()) { 1881 DWARFDIE sc_parent_die = 1882 SymbolFileDWARF::GetParentSymbolContextDIE(die); 1883 dw_tag_t sc_parent_tag = sc_parent_die.Tag(); 1884 1885 SymbolContextScope *symbol_context_scope = NULL; 1886 if (sc_parent_tag == DW_TAG_compile_unit || 1887 sc_parent_tag == DW_TAG_partial_unit) { 1888 symbol_context_scope = sc.comp_unit; 1889 } else if (sc.function != NULL && sc_parent_die) { 1890 symbol_context_scope = 1891 sc.function->GetBlock(true).FindBlockByID(sc_parent_die.GetID()); 1892 if (symbol_context_scope == NULL) 1893 symbol_context_scope = sc.function; 1894 } 1895 1896 if (symbol_context_scope != NULL) { 1897 type_sp->SetSymbolContextScope(symbol_context_scope); 1898 } 1899 1900 // We are ready to put this type into the uniqued list up at the module 1901 // level 1902 type_list->Insert(type_sp); 1903 1904 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1905 } 1906 } else if (type_ptr != DIE_IS_BEING_PARSED) { 1907 type_sp = type_ptr->shared_from_this(); 1908 } 1909 } 1910 return type_sp; 1911 } 1912 1913 // DWARF parsing functions 1914 1915 class DWARFASTParserClang::DelayedAddObjCClassProperty { 1916 public: 1917 DelayedAddObjCClassProperty( 1918 const CompilerType &class_opaque_type, const char *property_name, 1919 const CompilerType &property_opaque_type, // The property type is only 1920 // required if you don't have an 1921 // ivar decl 1922 clang::ObjCIvarDecl *ivar_decl, const char *property_setter_name, 1923 const char *property_getter_name, uint32_t property_attributes, 1924 const ClangASTMetadata *metadata) 1925 : m_class_opaque_type(class_opaque_type), m_property_name(property_name), 1926 m_property_opaque_type(property_opaque_type), m_ivar_decl(ivar_decl), 1927 m_property_setter_name(property_setter_name), 1928 m_property_getter_name(property_getter_name), 1929 m_property_attributes(property_attributes) { 1930 if (metadata != NULL) { 1931 m_metadata_up.reset(new ClangASTMetadata()); 1932 *m_metadata_up = *metadata; 1933 } 1934 } 1935 1936 DelayedAddObjCClassProperty(const DelayedAddObjCClassProperty &rhs) { 1937 *this = rhs; 1938 } 1939 1940 DelayedAddObjCClassProperty & 1941 operator=(const DelayedAddObjCClassProperty &rhs) { 1942 m_class_opaque_type = rhs.m_class_opaque_type; 1943 m_property_name = rhs.m_property_name; 1944 m_property_opaque_type = rhs.m_property_opaque_type; 1945 m_ivar_decl = rhs.m_ivar_decl; 1946 m_property_setter_name = rhs.m_property_setter_name; 1947 m_property_getter_name = rhs.m_property_getter_name; 1948 m_property_attributes = rhs.m_property_attributes; 1949 1950 if (rhs.m_metadata_up) { 1951 m_metadata_up.reset(new ClangASTMetadata()); 1952 *m_metadata_up = *rhs.m_metadata_up; 1953 } 1954 return *this; 1955 } 1956 1957 bool Finalize() { 1958 return ClangASTContext::AddObjCClassProperty( 1959 m_class_opaque_type, m_property_name, m_property_opaque_type, 1960 m_ivar_decl, m_property_setter_name, m_property_getter_name, 1961 m_property_attributes, m_metadata_up.get()); 1962 } 1963 1964 private: 1965 CompilerType m_class_opaque_type; 1966 const char *m_property_name; 1967 CompilerType m_property_opaque_type; 1968 clang::ObjCIvarDecl *m_ivar_decl; 1969 const char *m_property_setter_name; 1970 const char *m_property_getter_name; 1971 uint32_t m_property_attributes; 1972 std::unique_ptr<ClangASTMetadata> m_metadata_up; 1973 }; 1974 1975 bool DWARFASTParserClang::ParseTemplateDIE( 1976 const DWARFDIE &die, 1977 ClangASTContext::TemplateParameterInfos &template_param_infos) { 1978 const dw_tag_t tag = die.Tag(); 1979 bool is_template_template_argument = false; 1980 1981 switch (tag) { 1982 case DW_TAG_GNU_template_parameter_pack: { 1983 template_param_infos.packed_args.reset( 1984 new ClangASTContext::TemplateParameterInfos); 1985 for (DWARFDIE child_die = die.GetFirstChild(); child_die.IsValid(); 1986 child_die = child_die.GetSibling()) { 1987 if (!ParseTemplateDIE(child_die, *template_param_infos.packed_args)) 1988 return false; 1989 } 1990 if (const char *name = die.GetName()) { 1991 template_param_infos.pack_name = name; 1992 } 1993 return true; 1994 } 1995 case DW_TAG_GNU_template_template_param: 1996 is_template_template_argument = true; 1997 LLVM_FALLTHROUGH; 1998 case DW_TAG_template_type_parameter: 1999 case DW_TAG_template_value_parameter: { 2000 DWARFAttributes attributes; 2001 const size_t num_attributes = die.GetAttributes(attributes); 2002 const char *name = nullptr; 2003 const char *template_name = nullptr; 2004 CompilerType clang_type; 2005 uint64_t uval64 = 0; 2006 bool uval64_valid = false; 2007 if (num_attributes > 0) { 2008 DWARFFormValue form_value; 2009 for (size_t i = 0; i < num_attributes; ++i) { 2010 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2011 2012 switch (attr) { 2013 case DW_AT_name: 2014 if (attributes.ExtractFormValueAtIndex(i, form_value)) 2015 name = form_value.AsCString(); 2016 break; 2017 2018 case DW_AT_GNU_template_name: 2019 if (attributes.ExtractFormValueAtIndex(i, form_value)) 2020 template_name = form_value.AsCString(); 2021 break; 2022 2023 case DW_AT_type: 2024 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2025 Type *lldb_type = die.ResolveTypeUID(DIERef(form_value)); 2026 if (lldb_type) 2027 clang_type = lldb_type->GetForwardCompilerType(); 2028 } 2029 break; 2030 2031 case DW_AT_const_value: 2032 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2033 uval64_valid = true; 2034 uval64 = form_value.Unsigned(); 2035 } 2036 break; 2037 default: 2038 break; 2039 } 2040 } 2041 2042 clang::ASTContext *ast = m_ast.getASTContext(); 2043 if (!clang_type) 2044 clang_type = m_ast.GetBasicType(eBasicTypeVoid); 2045 2046 if (!is_template_template_argument) { 2047 bool is_signed = false; 2048 if (name && name[0]) 2049 template_param_infos.names.push_back(name); 2050 else 2051 template_param_infos.names.push_back(NULL); 2052 2053 // Get the signed value for any integer or enumeration if available 2054 clang_type.IsIntegerOrEnumerationType(is_signed); 2055 2056 if (tag == DW_TAG_template_value_parameter && uval64_valid) { 2057 llvm::Optional<uint64_t> size = clang_type.GetBitSize(nullptr); 2058 if (!size) 2059 return false; 2060 llvm::APInt apint(*size, uval64, is_signed); 2061 template_param_infos.args.push_back( 2062 clang::TemplateArgument(*ast, llvm::APSInt(apint, !is_signed), 2063 ClangUtil::GetQualType(clang_type))); 2064 } else { 2065 template_param_infos.args.push_back( 2066 clang::TemplateArgument(ClangUtil::GetQualType(clang_type))); 2067 } 2068 } else { 2069 auto *tplt_type = m_ast.CreateTemplateTemplateParmDecl(template_name); 2070 template_param_infos.names.push_back(name); 2071 template_param_infos.args.push_back( 2072 clang::TemplateArgument(clang::TemplateName(tplt_type))); 2073 } 2074 } 2075 } 2076 return true; 2077 2078 default: 2079 break; 2080 } 2081 return false; 2082 } 2083 2084 bool DWARFASTParserClang::ParseTemplateParameterInfos( 2085 const DWARFDIE &parent_die, 2086 ClangASTContext::TemplateParameterInfos &template_param_infos) { 2087 2088 if (!parent_die) 2089 return false; 2090 2091 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2092 die = die.GetSibling()) { 2093 const dw_tag_t tag = die.Tag(); 2094 2095 switch (tag) { 2096 case DW_TAG_template_type_parameter: 2097 case DW_TAG_template_value_parameter: 2098 case DW_TAG_GNU_template_parameter_pack: 2099 case DW_TAG_GNU_template_template_param: 2100 ParseTemplateDIE(die, template_param_infos); 2101 break; 2102 2103 default: 2104 break; 2105 } 2106 } 2107 if (template_param_infos.args.empty()) 2108 return false; 2109 return template_param_infos.args.size() == template_param_infos.names.size(); 2110 } 2111 2112 bool DWARFASTParserClang::CompleteTypeFromDWARF(const DWARFDIE &die, 2113 lldb_private::Type *type, 2114 CompilerType &clang_type) { 2115 SymbolFileDWARF *dwarf = die.GetDWARF(); 2116 2117 std::lock_guard<std::recursive_mutex> guard( 2118 dwarf->GetObjectFile()->GetModule()->GetMutex()); 2119 2120 // Disable external storage for this type so we don't get anymore 2121 // clang::ExternalASTSource queries for this type. 2122 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), false); 2123 2124 if (!die) 2125 return false; 2126 2127 #if defined LLDB_CONFIGURATION_DEBUG 2128 // For debugging purposes, the LLDB_DWARF_DONT_COMPLETE_TYPENAMES environment 2129 // variable can be set with one or more typenames separated by ';' 2130 // characters. This will cause this function to not complete any types whose 2131 // names match. 2132 // 2133 // Examples of setting this environment variable: 2134 // 2135 // LLDB_DWARF_DONT_COMPLETE_TYPENAMES=Foo 2136 // LLDB_DWARF_DONT_COMPLETE_TYPENAMES=Foo;Bar;Baz 2137 const char *dont_complete_typenames_cstr = 2138 getenv("LLDB_DWARF_DONT_COMPLETE_TYPENAMES"); 2139 if (dont_complete_typenames_cstr && dont_complete_typenames_cstr[0]) { 2140 const char *die_name = die.GetName(); 2141 if (die_name && die_name[0]) { 2142 const char *match = strstr(dont_complete_typenames_cstr, die_name); 2143 if (match) { 2144 size_t die_name_length = strlen(die_name); 2145 while (match) { 2146 const char separator_char = ';'; 2147 const char next_char = match[die_name_length]; 2148 if (next_char == '\0' || next_char == separator_char) { 2149 if (match == dont_complete_typenames_cstr || 2150 match[-1] == separator_char) 2151 return false; 2152 } 2153 match = strstr(match + 1, die_name); 2154 } 2155 } 2156 } 2157 } 2158 #endif 2159 2160 const dw_tag_t tag = die.Tag(); 2161 2162 Log *log = 2163 nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION)); 2164 if (log) 2165 dwarf->GetObjectFile()->GetModule()->LogMessageVerboseBacktrace( 2166 log, "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...", 2167 die.GetID(), die.GetTagAsCString(), type->GetName().AsCString()); 2168 assert(clang_type); 2169 DWARFAttributes attributes; 2170 switch (tag) { 2171 case DW_TAG_structure_type: 2172 case DW_TAG_union_type: 2173 case DW_TAG_class_type: { 2174 ClangASTImporter::LayoutInfo layout_info; 2175 2176 { 2177 if (die.HasChildren()) { 2178 LanguageType class_language = eLanguageTypeUnknown; 2179 if (ClangASTContext::IsObjCObjectOrInterfaceType(clang_type)) { 2180 class_language = eLanguageTypeObjC; 2181 // For objective C we don't start the definition when the class is 2182 // created. 2183 ClangASTContext::StartTagDeclarationDefinition(clang_type); 2184 } 2185 2186 int tag_decl_kind = -1; 2187 AccessType default_accessibility = eAccessNone; 2188 if (tag == DW_TAG_structure_type) { 2189 tag_decl_kind = clang::TTK_Struct; 2190 default_accessibility = eAccessPublic; 2191 } else if (tag == DW_TAG_union_type) { 2192 tag_decl_kind = clang::TTK_Union; 2193 default_accessibility = eAccessPublic; 2194 } else if (tag == DW_TAG_class_type) { 2195 tag_decl_kind = clang::TTK_Class; 2196 default_accessibility = eAccessPrivate; 2197 } 2198 2199 SymbolContext sc(die.GetLLDBCompileUnit()); 2200 std::vector<std::unique_ptr<clang::CXXBaseSpecifier>> bases; 2201 std::vector<int> member_accessibilities; 2202 bool is_a_class = false; 2203 // Parse members and base classes first 2204 std::vector<DWARFDIE> member_function_dies; 2205 2206 DelayedPropertyList delayed_properties; 2207 ParseChildMembers(sc, die, clang_type, class_language, bases, 2208 member_accessibilities, member_function_dies, 2209 delayed_properties, default_accessibility, is_a_class, 2210 layout_info); 2211 2212 // Now parse any methods if there were any... 2213 for (const DWARFDIE &die : member_function_dies) 2214 dwarf->ResolveType(die); 2215 2216 if (class_language == eLanguageTypeObjC) { 2217 ConstString class_name(clang_type.GetTypeName()); 2218 if (class_name) { 2219 DIEArray method_die_offsets; 2220 dwarf->GetObjCMethodDIEOffsets(class_name, method_die_offsets); 2221 2222 if (!method_die_offsets.empty()) { 2223 DWARFDebugInfo *debug_info = dwarf->DebugInfo(); 2224 2225 const size_t num_matches = method_die_offsets.size(); 2226 for (size_t i = 0; i < num_matches; ++i) { 2227 const DIERef &die_ref = method_die_offsets[i]; 2228 DWARFDIE method_die = debug_info->GetDIE(die_ref); 2229 2230 if (method_die) 2231 method_die.ResolveType(); 2232 } 2233 } 2234 2235 for (DelayedPropertyList::iterator pi = delayed_properties.begin(), 2236 pe = delayed_properties.end(); 2237 pi != pe; ++pi) 2238 pi->Finalize(); 2239 } 2240 } 2241 2242 // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we 2243 // need to tell the clang type it is actually a class. 2244 if (class_language != eLanguageTypeObjC) { 2245 if (is_a_class && tag_decl_kind != clang::TTK_Class) 2246 m_ast.SetTagTypeKind(ClangUtil::GetQualType(clang_type), 2247 clang::TTK_Class); 2248 } 2249 2250 // Since DW_TAG_structure_type gets used for both classes and 2251 // structures, we may need to set any DW_TAG_member fields to have a 2252 // "private" access if none was specified. When we parsed the child 2253 // members we tracked that actual accessibility value for each 2254 // DW_TAG_member in the "member_accessibilities" array. If the value 2255 // for the member is zero, then it was set to the 2256 // "default_accessibility" which for structs was "public". Below we 2257 // correct this by setting any fields to "private" that weren't 2258 // correctly set. 2259 if (is_a_class && !member_accessibilities.empty()) { 2260 // This is a class and all members that didn't have their access 2261 // specified are private. 2262 m_ast.SetDefaultAccessForRecordFields( 2263 m_ast.GetAsRecordDecl(clang_type), eAccessPrivate, 2264 &member_accessibilities.front(), member_accessibilities.size()); 2265 } 2266 2267 if (!bases.empty()) { 2268 // Make sure all base classes refer to complete types and not forward 2269 // declarations. If we don't do this, clang will crash with an 2270 // assertion in the call to clang_type.TransferBaseClasses() 2271 for (const auto &base_class : bases) { 2272 clang::TypeSourceInfo *type_source_info = 2273 base_class->getTypeSourceInfo(); 2274 if (type_source_info) { 2275 CompilerType base_class_type( 2276 &m_ast, type_source_info->getType().getAsOpaquePtr()); 2277 if (!base_class_type.GetCompleteType()) { 2278 auto module = dwarf->GetObjectFile()->GetModule(); 2279 module->ReportError(":: Class '%s' has a base class '%s' which " 2280 "does not have a complete definition.", 2281 die.GetName(), 2282 base_class_type.GetTypeName().GetCString()); 2283 if (die.GetCU()->GetProducer() == eProducerClang) 2284 module->ReportError(":: Try compiling the source file with " 2285 "-fstandalone-debug."); 2286 2287 // We have no choice other than to pretend that the base class 2288 // is complete. If we don't do this, clang will crash when we 2289 // call setBases() inside of 2290 // "clang_type.TransferBaseClasses()" below. Since we 2291 // provide layout assistance, all ivars in this class and other 2292 // classes will be fine, this is the best we can do short of 2293 // crashing. 2294 if (ClangASTContext::StartTagDeclarationDefinition( 2295 base_class_type)) { 2296 ClangASTContext::CompleteTagDeclarationDefinition( 2297 base_class_type); 2298 } 2299 } 2300 } 2301 } 2302 2303 m_ast.TransferBaseClasses(clang_type.GetOpaqueQualType(), 2304 std::move(bases)); 2305 } 2306 } 2307 } 2308 2309 m_ast.AddMethodOverridesForCXXRecordType(clang_type.GetOpaqueQualType()); 2310 ClangASTContext::BuildIndirectFields(clang_type); 2311 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 2312 2313 if (!layout_info.field_offsets.empty() || 2314 !layout_info.base_offsets.empty() || 2315 !layout_info.vbase_offsets.empty()) { 2316 if (type) 2317 layout_info.bit_size = type->GetByteSize().getValueOr(0) * 8; 2318 if (layout_info.bit_size == 0) 2319 layout_info.bit_size = 2320 die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 0) * 8; 2321 2322 clang::CXXRecordDecl *record_decl = 2323 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 2324 if (record_decl) { 2325 if (log) { 2326 ModuleSP module_sp = dwarf->GetObjectFile()->GetModule(); 2327 2328 if (module_sp) { 2329 module_sp->LogMessage( 2330 log, 2331 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) " 2332 "caching layout info for record_decl = %p, bit_size = %" PRIu64 2333 ", alignment = %" PRIu64 2334 ", field_offsets[%u], base_offsets[%u], vbase_offsets[%u])", 2335 static_cast<void *>(clang_type.GetOpaqueQualType()), 2336 static_cast<void *>(record_decl), layout_info.bit_size, 2337 layout_info.alignment, 2338 static_cast<uint32_t>(layout_info.field_offsets.size()), 2339 static_cast<uint32_t>(layout_info.base_offsets.size()), 2340 static_cast<uint32_t>(layout_info.vbase_offsets.size())); 2341 2342 uint32_t idx; 2343 { 2344 llvm::DenseMap<const clang::FieldDecl *, uint64_t>::const_iterator 2345 pos, 2346 end = layout_info.field_offsets.end(); 2347 for (idx = 0, pos = layout_info.field_offsets.begin(); pos != end; 2348 ++pos, ++idx) { 2349 module_sp->LogMessage( 2350 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2351 "%p) field[%u] = { bit_offset=%u, name='%s' }", 2352 static_cast<void *>(clang_type.GetOpaqueQualType()), idx, 2353 static_cast<uint32_t>(pos->second), 2354 pos->first->getNameAsString().c_str()); 2355 } 2356 } 2357 2358 { 2359 llvm::DenseMap<const clang::CXXRecordDecl *, 2360 clang::CharUnits>::const_iterator base_pos, 2361 base_end = layout_info.base_offsets.end(); 2362 for (idx = 0, base_pos = layout_info.base_offsets.begin(); 2363 base_pos != base_end; ++base_pos, ++idx) { 2364 module_sp->LogMessage( 2365 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2366 "%p) base[%u] = { byte_offset=%u, name='%s' }", 2367 clang_type.GetOpaqueQualType(), idx, 2368 (uint32_t)base_pos->second.getQuantity(), 2369 base_pos->first->getNameAsString().c_str()); 2370 } 2371 } 2372 { 2373 llvm::DenseMap<const clang::CXXRecordDecl *, 2374 clang::CharUnits>::const_iterator vbase_pos, 2375 vbase_end = layout_info.vbase_offsets.end(); 2376 for (idx = 0, vbase_pos = layout_info.vbase_offsets.begin(); 2377 vbase_pos != vbase_end; ++vbase_pos, ++idx) { 2378 module_sp->LogMessage( 2379 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2380 "%p) vbase[%u] = { byte_offset=%u, name='%s' }", 2381 static_cast<void *>(clang_type.GetOpaqueQualType()), idx, 2382 static_cast<uint32_t>(vbase_pos->second.getQuantity()), 2383 vbase_pos->first->getNameAsString().c_str()); 2384 } 2385 } 2386 } 2387 } 2388 GetClangASTImporter().InsertRecordDecl(record_decl, layout_info); 2389 } 2390 } 2391 } 2392 2393 return (bool)clang_type; 2394 2395 case DW_TAG_enumeration_type: 2396 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 2397 if (die.HasChildren()) { 2398 SymbolContext sc(die.GetLLDBCompileUnit()); 2399 bool is_signed = false; 2400 clang_type.IsIntegerType(is_signed); 2401 ParseChildEnumerators(sc, clang_type, is_signed, 2402 type->GetByteSize().getValueOr(0), die); 2403 } 2404 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 2405 } 2406 return (bool)clang_type; 2407 2408 default: 2409 assert(false && "not a forward clang type decl!"); 2410 break; 2411 } 2412 2413 return false; 2414 } 2415 2416 std::vector<DWARFDIE> DWARFASTParserClang::GetDIEForDeclContext( 2417 lldb_private::CompilerDeclContext decl_context) { 2418 std::vector<DWARFDIE> result; 2419 for (auto it = m_decl_ctx_to_die.find( 2420 (clang::DeclContext *)decl_context.GetOpaqueDeclContext()); 2421 it != m_decl_ctx_to_die.end(); it++) 2422 result.push_back(it->second); 2423 return result; 2424 } 2425 2426 CompilerDecl DWARFASTParserClang::GetDeclForUIDFromDWARF(const DWARFDIE &die) { 2427 clang::Decl *clang_decl = GetClangDeclForDIE(die); 2428 if (clang_decl != nullptr) 2429 return CompilerDecl(&m_ast, clang_decl); 2430 return CompilerDecl(); 2431 } 2432 2433 CompilerDeclContext 2434 DWARFASTParserClang::GetDeclContextForUIDFromDWARF(const DWARFDIE &die) { 2435 clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE(die); 2436 if (clang_decl_ctx) 2437 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2438 return CompilerDeclContext(); 2439 } 2440 2441 CompilerDeclContext 2442 DWARFASTParserClang::GetDeclContextContainingUIDFromDWARF(const DWARFDIE &die) { 2443 clang::DeclContext *clang_decl_ctx = 2444 GetClangDeclContextContainingDIE(die, nullptr); 2445 if (clang_decl_ctx) 2446 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2447 return CompilerDeclContext(); 2448 } 2449 2450 size_t DWARFASTParserClang::ParseChildEnumerators( 2451 const SymbolContext &sc, lldb_private::CompilerType &clang_type, 2452 bool is_signed, uint32_t enumerator_byte_size, const DWARFDIE &parent_die) { 2453 if (!parent_die) 2454 return 0; 2455 2456 size_t enumerators_added = 0; 2457 2458 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2459 die = die.GetSibling()) { 2460 const dw_tag_t tag = die.Tag(); 2461 if (tag == DW_TAG_enumerator) { 2462 DWARFAttributes attributes; 2463 const size_t num_child_attributes = die.GetAttributes(attributes); 2464 if (num_child_attributes > 0) { 2465 const char *name = NULL; 2466 bool got_value = false; 2467 int64_t enum_value = 0; 2468 Declaration decl; 2469 2470 uint32_t i; 2471 for (i = 0; i < num_child_attributes; ++i) { 2472 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2473 DWARFFormValue form_value; 2474 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2475 switch (attr) { 2476 case DW_AT_const_value: 2477 got_value = true; 2478 if (is_signed) 2479 enum_value = form_value.Signed(); 2480 else 2481 enum_value = form_value.Unsigned(); 2482 break; 2483 2484 case DW_AT_name: 2485 name = form_value.AsCString(); 2486 break; 2487 2488 case DW_AT_description: 2489 default: 2490 case DW_AT_decl_file: 2491 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 2492 form_value.Unsigned())); 2493 break; 2494 case DW_AT_decl_line: 2495 decl.SetLine(form_value.Unsigned()); 2496 break; 2497 case DW_AT_decl_column: 2498 decl.SetColumn(form_value.Unsigned()); 2499 break; 2500 case DW_AT_sibling: 2501 break; 2502 } 2503 } 2504 } 2505 2506 if (name && name[0] && got_value) { 2507 m_ast.AddEnumerationValueToEnumerationType( 2508 clang_type, decl, name, enum_value, enumerator_byte_size * 8); 2509 ++enumerators_added; 2510 } 2511 } 2512 } 2513 } 2514 return enumerators_added; 2515 } 2516 2517 #if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE) 2518 2519 class DIEStack { 2520 public: 2521 void Push(const DWARFDIE &die) { m_dies.push_back(die); } 2522 2523 void LogDIEs(Log *log) { 2524 StreamString log_strm; 2525 const size_t n = m_dies.size(); 2526 log_strm.Printf("DIEStack[%" PRIu64 "]:\n", (uint64_t)n); 2527 for (size_t i = 0; i < n; i++) { 2528 std::string qualified_name; 2529 const DWARFDIE &die = m_dies[i]; 2530 die.GetQualifiedName(qualified_name); 2531 log_strm.Printf("[%" PRIu64 "] 0x%8.8x: %s name='%s'\n", (uint64_t)i, 2532 die.GetOffset(), die.GetTagAsCString(), 2533 qualified_name.c_str()); 2534 } 2535 log->PutCString(log_strm.GetData()); 2536 } 2537 void Pop() { m_dies.pop_back(); } 2538 2539 class ScopedPopper { 2540 public: 2541 ScopedPopper(DIEStack &die_stack) 2542 : m_die_stack(die_stack), m_valid(false) {} 2543 2544 void Push(const DWARFDIE &die) { 2545 m_valid = true; 2546 m_die_stack.Push(die); 2547 } 2548 2549 ~ScopedPopper() { 2550 if (m_valid) 2551 m_die_stack.Pop(); 2552 } 2553 2554 protected: 2555 DIEStack &m_die_stack; 2556 bool m_valid; 2557 }; 2558 2559 protected: 2560 typedef std::vector<DWARFDIE> Stack; 2561 Stack m_dies; 2562 }; 2563 #endif 2564 2565 Function *DWARFASTParserClang::ParseFunctionFromDWARF(CompileUnit &comp_unit, 2566 const DWARFDIE &die) { 2567 DWARFRangeList func_ranges; 2568 const char *name = NULL; 2569 const char *mangled = NULL; 2570 int decl_file = 0; 2571 int decl_line = 0; 2572 int decl_column = 0; 2573 int call_file = 0; 2574 int call_line = 0; 2575 int call_column = 0; 2576 DWARFExpression frame_base(die.GetCU()); 2577 2578 const dw_tag_t tag = die.Tag(); 2579 2580 if (tag != DW_TAG_subprogram) 2581 return NULL; 2582 2583 if (die.GetDIENamesAndRanges(name, mangled, func_ranges, decl_file, decl_line, 2584 decl_column, call_file, call_line, call_column, 2585 &frame_base)) { 2586 2587 // Union of all ranges in the function DIE (if the function is 2588 // discontiguous) 2589 AddressRange func_range; 2590 lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase(0); 2591 lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd(0); 2592 if (lowest_func_addr != LLDB_INVALID_ADDRESS && 2593 lowest_func_addr <= highest_func_addr) { 2594 ModuleSP module_sp(die.GetModule()); 2595 func_range.GetBaseAddress().ResolveAddressUsingFileSections( 2596 lowest_func_addr, module_sp->GetSectionList()); 2597 if (func_range.GetBaseAddress().IsValid()) 2598 func_range.SetByteSize(highest_func_addr - lowest_func_addr); 2599 } 2600 2601 if (func_range.GetBaseAddress().IsValid()) { 2602 Mangled func_name; 2603 if (mangled) 2604 func_name.SetValue(ConstString(mangled), true); 2605 else if ((die.GetParent().Tag() == DW_TAG_compile_unit || 2606 die.GetParent().Tag() == DW_TAG_partial_unit) && 2607 Language::LanguageIsCPlusPlus(die.GetLanguage()) && name && 2608 strcmp(name, "main") != 0) { 2609 // If the mangled name is not present in the DWARF, generate the 2610 // demangled name using the decl context. We skip if the function is 2611 // "main" as its name is never mangled. 2612 bool is_static = false; 2613 bool is_variadic = false; 2614 bool has_template_params = false; 2615 unsigned type_quals = 0; 2616 std::vector<CompilerType> param_types; 2617 std::vector<clang::ParmVarDecl *> param_decls; 2618 DWARFDeclContext decl_ctx; 2619 StreamString sstr; 2620 2621 die.GetDWARFDeclContext(decl_ctx); 2622 sstr << decl_ctx.GetQualifiedName(); 2623 2624 clang::DeclContext *containing_decl_ctx = 2625 GetClangDeclContextContainingDIE(die, nullptr); 2626 ParseChildParameters(comp_unit, containing_decl_ctx, die, true, 2627 is_static, is_variadic, has_template_params, 2628 param_types, param_decls, type_quals); 2629 sstr << "("; 2630 for (size_t i = 0; i < param_types.size(); i++) { 2631 if (i > 0) 2632 sstr << ", "; 2633 sstr << param_types[i].GetTypeName(); 2634 } 2635 if (is_variadic) 2636 sstr << ", ..."; 2637 sstr << ")"; 2638 if (type_quals & clang::Qualifiers::Const) 2639 sstr << " const"; 2640 2641 func_name.SetValue(ConstString(sstr.GetString()), false); 2642 } else 2643 func_name.SetValue(ConstString(name), false); 2644 2645 FunctionSP func_sp; 2646 std::unique_ptr<Declaration> decl_up; 2647 if (decl_file != 0 || decl_line != 0 || decl_column != 0) 2648 decl_up.reset(new Declaration( 2649 comp_unit.GetSupportFiles().GetFileSpecAtIndex(decl_file), 2650 decl_line, decl_column)); 2651 2652 SymbolFileDWARF *dwarf = die.GetDWARF(); 2653 // Supply the type _only_ if it has already been parsed 2654 Type *func_type = dwarf->GetDIEToType().lookup(die.GetDIE()); 2655 2656 assert(func_type == NULL || func_type != DIE_IS_BEING_PARSED); 2657 2658 if (dwarf->FixupAddress(func_range.GetBaseAddress())) { 2659 const user_id_t func_user_id = die.GetID(); 2660 func_sp = 2661 std::make_shared<Function>(&comp_unit, 2662 func_user_id, // UserID is the DIE offset 2663 func_user_id, func_name, func_type, 2664 func_range); // first address range 2665 2666 if (func_sp.get() != NULL) { 2667 if (frame_base.IsValid()) 2668 func_sp->GetFrameBaseExpression() = frame_base; 2669 comp_unit.AddFunction(func_sp); 2670 return func_sp.get(); 2671 } 2672 } 2673 } 2674 } 2675 return NULL; 2676 } 2677 2678 bool DWARFASTParserClang::ParseChildMembers( 2679 const SymbolContext &sc, const DWARFDIE &parent_die, 2680 CompilerType &class_clang_type, const LanguageType class_language, 2681 std::vector<std::unique_ptr<clang::CXXBaseSpecifier>> &base_classes, 2682 std::vector<int> &member_accessibilities, 2683 std::vector<DWARFDIE> &member_function_dies, 2684 DelayedPropertyList &delayed_properties, AccessType &default_accessibility, 2685 bool &is_a_class, ClangASTImporter::LayoutInfo &layout_info) { 2686 if (!parent_die) 2687 return 0; 2688 2689 // Get the parent byte size so we can verify any members will fit 2690 const uint64_t parent_byte_size = 2691 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, UINT64_MAX); 2692 const uint64_t parent_bit_size = 2693 parent_byte_size == UINT64_MAX ? UINT64_MAX : parent_byte_size * 8; 2694 2695 uint32_t member_idx = 0; 2696 BitfieldInfo last_field_info; 2697 2698 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule(); 2699 ClangASTContext *ast = 2700 llvm::dyn_cast_or_null<ClangASTContext>(class_clang_type.GetTypeSystem()); 2701 if (ast == nullptr) 2702 return 0; 2703 2704 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2705 die = die.GetSibling()) { 2706 dw_tag_t tag = die.Tag(); 2707 2708 switch (tag) { 2709 case DW_TAG_member: 2710 case DW_TAG_APPLE_property: { 2711 DWARFAttributes attributes; 2712 const size_t num_attributes = die.GetAttributes(attributes); 2713 if (num_attributes > 0) { 2714 Declaration decl; 2715 // DWARFExpression location; 2716 const char *name = NULL; 2717 const char *prop_name = NULL; 2718 const char *prop_getter_name = NULL; 2719 const char *prop_setter_name = NULL; 2720 uint32_t prop_attributes = 0; 2721 2722 bool is_artificial = false; 2723 DWARFFormValue encoding_form; 2724 AccessType accessibility = eAccessNone; 2725 uint32_t member_byte_offset = 2726 (parent_die.Tag() == DW_TAG_union_type) ? 0 : UINT32_MAX; 2727 llvm::Optional<uint64_t> byte_size; 2728 int64_t bit_offset = 0; 2729 uint64_t data_bit_offset = UINT64_MAX; 2730 size_t bit_size = 0; 2731 bool is_external = 2732 false; // On DW_TAG_members, this means the member is static 2733 uint32_t i; 2734 for (i = 0; i < num_attributes && !is_artificial; ++i) { 2735 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2736 DWARFFormValue form_value; 2737 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2738 switch (attr) { 2739 case DW_AT_decl_file: 2740 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 2741 form_value.Unsigned())); 2742 break; 2743 case DW_AT_decl_line: 2744 decl.SetLine(form_value.Unsigned()); 2745 break; 2746 case DW_AT_decl_column: 2747 decl.SetColumn(form_value.Unsigned()); 2748 break; 2749 case DW_AT_name: 2750 name = form_value.AsCString(); 2751 break; 2752 case DW_AT_type: 2753 encoding_form = form_value; 2754 break; 2755 case DW_AT_bit_offset: 2756 bit_offset = form_value.Signed(); 2757 break; 2758 case DW_AT_bit_size: 2759 bit_size = form_value.Unsigned(); 2760 break; 2761 case DW_AT_byte_size: 2762 byte_size = form_value.Unsigned(); 2763 break; 2764 case DW_AT_data_bit_offset: 2765 data_bit_offset = form_value.Unsigned(); 2766 break; 2767 case DW_AT_data_member_location: 2768 if (form_value.BlockData()) { 2769 Value initialValue(0); 2770 Value memberOffset(0); 2771 const DWARFDataExtractor &debug_info_data = die.GetData(); 2772 uint32_t block_length = form_value.Unsigned(); 2773 uint32_t block_offset = 2774 form_value.BlockData() - debug_info_data.GetDataStart(); 2775 if (DWARFExpression::Evaluate( 2776 nullptr, // ExecutionContext * 2777 nullptr, // RegisterContext * 2778 module_sp, debug_info_data, die.GetCU(), block_offset, 2779 block_length, eRegisterKindDWARF, &initialValue, 2780 nullptr, memberOffset, nullptr)) { 2781 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 2782 } 2783 } else { 2784 // With DWARF 3 and later, if the value is an integer constant, 2785 // this form value is the offset in bytes from the beginning of 2786 // the containing entity. 2787 member_byte_offset = form_value.Unsigned(); 2788 } 2789 break; 2790 2791 case DW_AT_accessibility: 2792 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 2793 break; 2794 case DW_AT_artificial: 2795 is_artificial = form_value.Boolean(); 2796 break; 2797 case DW_AT_APPLE_property_name: 2798 prop_name = form_value.AsCString(); 2799 break; 2800 case DW_AT_APPLE_property_getter: 2801 prop_getter_name = form_value.AsCString(); 2802 break; 2803 case DW_AT_APPLE_property_setter: 2804 prop_setter_name = form_value.AsCString(); 2805 break; 2806 case DW_AT_APPLE_property_attribute: 2807 prop_attributes = form_value.Unsigned(); 2808 break; 2809 case DW_AT_external: 2810 is_external = form_value.Boolean(); 2811 break; 2812 2813 default: 2814 case DW_AT_declaration: 2815 case DW_AT_description: 2816 case DW_AT_mutable: 2817 case DW_AT_visibility: 2818 case DW_AT_sibling: 2819 break; 2820 } 2821 } 2822 } 2823 2824 if (prop_name) { 2825 ConstString fixed_getter; 2826 ConstString fixed_setter; 2827 2828 // Check if the property getter/setter were provided as full names. 2829 // We want basenames, so we extract them. 2830 2831 if (prop_getter_name && prop_getter_name[0] == '-') { 2832 ObjCLanguage::MethodName prop_getter_method(prop_getter_name, true); 2833 prop_getter_name = prop_getter_method.GetSelector().GetCString(); 2834 } 2835 2836 if (prop_setter_name && prop_setter_name[0] == '-') { 2837 ObjCLanguage::MethodName prop_setter_method(prop_setter_name, true); 2838 prop_setter_name = prop_setter_method.GetSelector().GetCString(); 2839 } 2840 2841 // If the names haven't been provided, they need to be filled in. 2842 2843 if (!prop_getter_name) { 2844 prop_getter_name = prop_name; 2845 } 2846 if (!prop_setter_name && prop_name[0] && 2847 !(prop_attributes & DW_APPLE_PROPERTY_readonly)) { 2848 StreamString ss; 2849 2850 ss.Printf("set%c%s:", toupper(prop_name[0]), &prop_name[1]); 2851 2852 fixed_setter.SetString(ss.GetString()); 2853 prop_setter_name = fixed_setter.GetCString(); 2854 } 2855 } 2856 2857 // Clang has a DWARF generation bug where sometimes it represents 2858 // fields that are references with bad byte size and bit size/offset 2859 // information such as: 2860 // 2861 // DW_AT_byte_size( 0x00 ) 2862 // DW_AT_bit_size( 0x40 ) 2863 // DW_AT_bit_offset( 0xffffffffffffffc0 ) 2864 // 2865 // So check the bit offset to make sure it is sane, and if the values 2866 // are not sane, remove them. If we don't do this then we will end up 2867 // with a crash if we try to use this type in an expression when clang 2868 // becomes unhappy with its recycled debug info. 2869 2870 if (byte_size.getValueOr(0) == 0 && bit_offset < 0) { 2871 bit_size = 0; 2872 bit_offset = 0; 2873 } 2874 2875 // FIXME: Make Clang ignore Objective-C accessibility for expressions 2876 if (class_language == eLanguageTypeObjC || 2877 class_language == eLanguageTypeObjC_plus_plus) 2878 accessibility = eAccessNone; 2879 2880 // Handle static members 2881 if (is_external && member_byte_offset == UINT32_MAX) { 2882 Type *var_type = die.ResolveTypeUID(DIERef(encoding_form)); 2883 2884 if (var_type) { 2885 if (accessibility == eAccessNone) 2886 accessibility = eAccessPublic; 2887 ClangASTContext::AddVariableToRecordType( 2888 class_clang_type, name, var_type->GetLayoutCompilerType(), 2889 accessibility); 2890 } 2891 break; 2892 } 2893 2894 if (!is_artificial) { 2895 Type *member_type = die.ResolveTypeUID(DIERef(encoding_form)); 2896 2897 clang::FieldDecl *field_decl = NULL; 2898 if (tag == DW_TAG_member) { 2899 if (member_type) { 2900 if (accessibility == eAccessNone) 2901 accessibility = default_accessibility; 2902 member_accessibilities.push_back(accessibility); 2903 2904 uint64_t field_bit_offset = 2905 (member_byte_offset == UINT32_MAX ? 0 2906 : (member_byte_offset * 8)); 2907 if (bit_size > 0) { 2908 2909 BitfieldInfo this_field_info; 2910 this_field_info.bit_offset = field_bit_offset; 2911 this_field_info.bit_size = bit_size; 2912 2913 ///////////////////////////////////////////////////////////// 2914 // How to locate a field given the DWARF debug information 2915 // 2916 // AT_byte_size indicates the size of the word in which the bit 2917 // offset must be interpreted. 2918 // 2919 // AT_data_member_location indicates the byte offset of the 2920 // word from the base address of the structure. 2921 // 2922 // AT_bit_offset indicates how many bits into the word 2923 // (according to the host endianness) the low-order bit of the 2924 // field starts. AT_bit_offset can be negative. 2925 // 2926 // AT_bit_size indicates the size of the field in bits. 2927 ///////////////////////////////////////////////////////////// 2928 2929 if (data_bit_offset != UINT64_MAX) { 2930 this_field_info.bit_offset = data_bit_offset; 2931 } else { 2932 if (!byte_size) 2933 byte_size = member_type->GetByteSize(); 2934 2935 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 2936 if (objfile->GetByteOrder() == eByteOrderLittle) { 2937 this_field_info.bit_offset += byte_size.getValueOr(0) * 8; 2938 this_field_info.bit_offset -= (bit_offset + bit_size); 2939 } else { 2940 this_field_info.bit_offset += bit_offset; 2941 } 2942 } 2943 2944 if ((this_field_info.bit_offset >= parent_bit_size) || 2945 !last_field_info.NextBitfieldOffsetIsValid( 2946 this_field_info.bit_offset)) { 2947 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 2948 objfile->GetModule()->ReportWarning( 2949 "0x%8.8" PRIx64 ": %s bitfield named \"%s\" has invalid " 2950 "bit offset (0x%8.8" PRIx64 2951 ") member will be ignored. Please file a bug against the " 2952 "compiler and include the preprocessed output for %s\n", 2953 die.GetID(), DW_TAG_value_to_name(tag), name, 2954 this_field_info.bit_offset, 2955 sc.comp_unit ? sc.comp_unit->GetPath().c_str() 2956 : "the source file"); 2957 this_field_info.Clear(); 2958 continue; 2959 } 2960 2961 // Update the field bit offset we will report for layout 2962 field_bit_offset = this_field_info.bit_offset; 2963 2964 // If the member to be emitted did not start on a character 2965 // boundary and there is empty space between the last field and 2966 // this one, then we need to emit an anonymous member filling 2967 // up the space up to its start. There are three cases here: 2968 // 2969 // 1 If the previous member ended on a character boundary, then 2970 // we can emit an 2971 // anonymous member starting at the most recent character 2972 // boundary. 2973 // 2974 // 2 If the previous member did not end on a character boundary 2975 // and the distance 2976 // from the end of the previous member to the current member 2977 // is less than a 2978 // word width, then we can emit an anonymous member starting 2979 // right after the 2980 // previous member and right before this member. 2981 // 2982 // 3 If the previous member did not end on a character boundary 2983 // and the distance 2984 // from the end of the previous member to the current member 2985 // is greater than 2986 // or equal a word width, then we act as in Case 1. 2987 2988 const uint64_t character_width = 8; 2989 const uint64_t word_width = 32; 2990 2991 // Objective-C has invalid DW_AT_bit_offset values in older 2992 // versions of clang, so we have to be careful and only insert 2993 // unnamed bitfields if we have a new enough clang. 2994 bool detect_unnamed_bitfields = true; 2995 2996 if (class_language == eLanguageTypeObjC || 2997 class_language == eLanguageTypeObjC_plus_plus) 2998 detect_unnamed_bitfields = 2999 die.GetCU()->Supports_unnamed_objc_bitfields(); 3000 3001 if (detect_unnamed_bitfields) { 3002 BitfieldInfo anon_field_info; 3003 3004 if ((this_field_info.bit_offset % character_width) != 3005 0) // not char aligned 3006 { 3007 uint64_t last_field_end = 0; 3008 3009 if (last_field_info.IsValid()) 3010 last_field_end = 3011 last_field_info.bit_offset + last_field_info.bit_size; 3012 3013 if (this_field_info.bit_offset != last_field_end) { 3014 if (((last_field_end % character_width) == 0) || // case 1 3015 (this_field_info.bit_offset - last_field_end >= 3016 word_width)) // case 3 3017 { 3018 anon_field_info.bit_size = 3019 this_field_info.bit_offset % character_width; 3020 anon_field_info.bit_offset = 3021 this_field_info.bit_offset - 3022 anon_field_info.bit_size; 3023 } else // case 2 3024 { 3025 anon_field_info.bit_size = 3026 this_field_info.bit_offset - last_field_end; 3027 anon_field_info.bit_offset = last_field_end; 3028 } 3029 } 3030 } 3031 3032 if (anon_field_info.IsValid()) { 3033 clang::FieldDecl *unnamed_bitfield_decl = 3034 ClangASTContext::AddFieldToRecordType( 3035 class_clang_type, llvm::StringRef(), 3036 m_ast.GetBuiltinTypeForEncodingAndBitSize( 3037 eEncodingSint, word_width), 3038 accessibility, anon_field_info.bit_size); 3039 3040 layout_info.field_offsets.insert(std::make_pair( 3041 unnamed_bitfield_decl, anon_field_info.bit_offset)); 3042 } 3043 } 3044 last_field_info = this_field_info; 3045 } else { 3046 last_field_info.Clear(); 3047 } 3048 3049 CompilerType member_clang_type = 3050 member_type->GetLayoutCompilerType(); 3051 if (!member_clang_type.IsCompleteType()) 3052 member_clang_type.GetCompleteType(); 3053 3054 { 3055 // Older versions of clang emit array[0] and array[1] in the 3056 // same way (<rdar://problem/12566646>). If the current field 3057 // is at the end of the structure, then there is definitely no 3058 // room for extra elements and we override the type to 3059 // array[0]. 3060 3061 CompilerType member_array_element_type; 3062 uint64_t member_array_size; 3063 bool member_array_is_incomplete; 3064 3065 if (member_clang_type.IsArrayType( 3066 &member_array_element_type, &member_array_size, 3067 &member_array_is_incomplete) && 3068 !member_array_is_incomplete) { 3069 uint64_t parent_byte_size = 3070 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 3071 UINT64_MAX); 3072 3073 if (member_byte_offset >= parent_byte_size) { 3074 if (member_array_size != 1 && 3075 (member_array_size != 0 || 3076 member_byte_offset > parent_byte_size)) { 3077 module_sp->ReportError( 3078 "0x%8.8" PRIx64 3079 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 3080 " which extends beyond the bounds of 0x%8.8" PRIx64, 3081 die.GetID(), name, encoding_form.Reference(), 3082 parent_die.GetID()); 3083 } 3084 3085 member_clang_type = m_ast.CreateArrayType( 3086 member_array_element_type, 0, false); 3087 } 3088 } 3089 } 3090 3091 if (ClangASTContext::IsCXXClassType(member_clang_type) && 3092 !member_clang_type.GetCompleteType()) { 3093 if (die.GetCU()->GetProducer() == eProducerClang) 3094 module_sp->ReportError( 3095 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3096 "0x%8.8x (%s) whose type is a forward declaration, not a " 3097 "complete definition.\nTry compiling the source file " 3098 "with -fstandalone-debug", 3099 parent_die.GetOffset(), parent_die.GetName(), 3100 die.GetOffset(), name); 3101 else 3102 module_sp->ReportError( 3103 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3104 "0x%8.8x (%s) whose type is a forward declaration, not a " 3105 "complete definition.\nPlease file a bug against the " 3106 "compiler and include the preprocessed output for %s", 3107 parent_die.GetOffset(), parent_die.GetName(), 3108 die.GetOffset(), name, 3109 sc.comp_unit ? sc.comp_unit->GetPath().c_str() 3110 : "the source file"); 3111 // We have no choice other than to pretend that the member 3112 // class is complete. If we don't do this, clang will crash 3113 // when trying to layout the class. Since we provide layout 3114 // assistance, all ivars in this class and other classes will 3115 // be fine, this is the best we can do short of crashing. 3116 if (ClangASTContext::StartTagDeclarationDefinition( 3117 member_clang_type)) { 3118 ClangASTContext::CompleteTagDeclarationDefinition( 3119 member_clang_type); 3120 } else { 3121 module_sp->ReportError( 3122 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3123 "0x%8.8x (%s) whose type claims to be a C++ class but we " 3124 "were not able to start its definition.\nPlease file a " 3125 "bug and attach the file at the start of this error " 3126 "message", 3127 parent_die.GetOffset(), parent_die.GetName(), 3128 die.GetOffset(), name); 3129 } 3130 } 3131 3132 field_decl = ClangASTContext::AddFieldToRecordType( 3133 class_clang_type, name, member_clang_type, accessibility, 3134 bit_size); 3135 3136 m_ast.SetMetadataAsUserID(field_decl, die.GetID()); 3137 3138 layout_info.field_offsets.insert( 3139 std::make_pair(field_decl, field_bit_offset)); 3140 } else { 3141 if (name) 3142 module_sp->ReportError( 3143 "0x%8.8" PRIx64 3144 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 3145 " which was unable to be parsed", 3146 die.GetID(), name, encoding_form.Reference()); 3147 else 3148 module_sp->ReportError( 3149 "0x%8.8" PRIx64 3150 ": DW_TAG_member refers to type 0x%8.8" PRIx64 3151 " which was unable to be parsed", 3152 die.GetID(), encoding_form.Reference()); 3153 } 3154 } 3155 3156 if (prop_name != NULL && member_type) { 3157 clang::ObjCIvarDecl *ivar_decl = NULL; 3158 3159 if (field_decl) { 3160 ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl); 3161 assert(ivar_decl != NULL); 3162 } 3163 3164 ClangASTMetadata metadata; 3165 metadata.SetUserID(die.GetID()); 3166 delayed_properties.push_back(DelayedAddObjCClassProperty( 3167 class_clang_type, prop_name, 3168 member_type->GetLayoutCompilerType(), ivar_decl, 3169 prop_setter_name, prop_getter_name, prop_attributes, 3170 &metadata)); 3171 3172 if (ivar_decl) 3173 m_ast.SetMetadataAsUserID(ivar_decl, die.GetID()); 3174 } 3175 } 3176 } 3177 ++member_idx; 3178 } break; 3179 3180 case DW_TAG_subprogram: 3181 // Let the type parsing code handle this one for us. 3182 member_function_dies.push_back(die); 3183 break; 3184 3185 case DW_TAG_inheritance: { 3186 is_a_class = true; 3187 if (default_accessibility == eAccessNone) 3188 default_accessibility = eAccessPrivate; 3189 // TODO: implement DW_TAG_inheritance type parsing 3190 DWARFAttributes attributes; 3191 const size_t num_attributes = die.GetAttributes(attributes); 3192 if (num_attributes > 0) { 3193 Declaration decl; 3194 DWARFExpression location(die.GetCU()); 3195 DWARFFormValue encoding_form; 3196 AccessType accessibility = default_accessibility; 3197 bool is_virtual = false; 3198 bool is_base_of_class = true; 3199 off_t member_byte_offset = 0; 3200 uint32_t i; 3201 for (i = 0; i < num_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_decl_file: 3207 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 3208 form_value.Unsigned())); 3209 break; 3210 case DW_AT_decl_line: 3211 decl.SetLine(form_value.Unsigned()); 3212 break; 3213 case DW_AT_decl_column: 3214 decl.SetColumn(form_value.Unsigned()); 3215 break; 3216 case DW_AT_type: 3217 encoding_form = form_value; 3218 break; 3219 case DW_AT_data_member_location: 3220 if (form_value.BlockData()) { 3221 Value initialValue(0); 3222 Value memberOffset(0); 3223 const DWARFDataExtractor &debug_info_data = die.GetData(); 3224 uint32_t block_length = form_value.Unsigned(); 3225 uint32_t block_offset = 3226 form_value.BlockData() - debug_info_data.GetDataStart(); 3227 if (DWARFExpression::Evaluate(nullptr, nullptr, module_sp, 3228 debug_info_data, die.GetCU(), 3229 block_offset, block_length, 3230 eRegisterKindDWARF, &initialValue, 3231 nullptr, memberOffset, nullptr)) { 3232 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 3233 } 3234 } else { 3235 // With DWARF 3 and later, if the value is an integer constant, 3236 // this form value is the offset in bytes from the beginning of 3237 // the containing entity. 3238 member_byte_offset = form_value.Unsigned(); 3239 } 3240 break; 3241 3242 case DW_AT_accessibility: 3243 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 3244 break; 3245 3246 case DW_AT_virtuality: 3247 is_virtual = form_value.Boolean(); 3248 break; 3249 3250 case DW_AT_sibling: 3251 break; 3252 3253 default: 3254 break; 3255 } 3256 } 3257 } 3258 3259 Type *base_class_type = die.ResolveTypeUID(DIERef(encoding_form)); 3260 if (base_class_type == NULL) { 3261 module_sp->ReportError("0x%8.8x: DW_TAG_inheritance failed to " 3262 "resolve the base class at 0x%8.8" PRIx64 3263 " from enclosing type 0x%8.8x. \nPlease file " 3264 "a bug and attach the file at the start of " 3265 "this error message", 3266 die.GetOffset(), encoding_form.Reference(), 3267 parent_die.GetOffset()); 3268 break; 3269 } 3270 3271 CompilerType base_class_clang_type = 3272 base_class_type->GetFullCompilerType(); 3273 assert(base_class_clang_type); 3274 if (class_language == eLanguageTypeObjC) { 3275 ast->SetObjCSuperClass(class_clang_type, base_class_clang_type); 3276 } else { 3277 std::unique_ptr<clang::CXXBaseSpecifier> result = 3278 ast->CreateBaseClassSpecifier( 3279 base_class_clang_type.GetOpaqueQualType(), accessibility, 3280 is_virtual, is_base_of_class); 3281 if (!result) 3282 break; 3283 3284 base_classes.push_back(std::move(result)); 3285 3286 if (is_virtual) { 3287 // Do not specify any offset for virtual inheritance. The DWARF 3288 // produced by clang doesn't give us a constant offset, but gives 3289 // us a DWARF expressions that requires an actual object in memory. 3290 // the DW_AT_data_member_location for a virtual base class looks 3291 // like: 3292 // DW_AT_data_member_location( DW_OP_dup, DW_OP_deref, 3293 // DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref, 3294 // DW_OP_plus ) 3295 // Given this, there is really no valid response we can give to 3296 // clang for virtual base class offsets, and this should eventually 3297 // be removed from LayoutRecordType() in the external 3298 // AST source in clang. 3299 } else { 3300 layout_info.base_offsets.insert(std::make_pair( 3301 ast->GetAsCXXRecordDecl( 3302 base_class_clang_type.GetOpaqueQualType()), 3303 clang::CharUnits::fromQuantity(member_byte_offset))); 3304 } 3305 } 3306 } 3307 } break; 3308 3309 default: 3310 break; 3311 } 3312 } 3313 3314 return true; 3315 } 3316 3317 size_t DWARFASTParserClang::ParseChildParameters( 3318 CompileUnit &comp_unit, clang::DeclContext *containing_decl_ctx, 3319 const DWARFDIE &parent_die, bool skip_artificial, bool &is_static, 3320 bool &is_variadic, bool &has_template_params, 3321 std::vector<CompilerType> &function_param_types, 3322 std::vector<clang::ParmVarDecl *> &function_param_decls, 3323 unsigned &type_quals) { 3324 if (!parent_die) 3325 return 0; 3326 3327 size_t arg_idx = 0; 3328 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 3329 die = die.GetSibling()) { 3330 const dw_tag_t tag = die.Tag(); 3331 switch (tag) { 3332 case DW_TAG_formal_parameter: { 3333 DWARFAttributes attributes; 3334 const size_t num_attributes = die.GetAttributes(attributes); 3335 if (num_attributes > 0) { 3336 const char *name = NULL; 3337 Declaration decl; 3338 DWARFFormValue param_type_die_form; 3339 bool is_artificial = false; 3340 // one of None, Auto, Register, Extern, Static, PrivateExtern 3341 3342 clang::StorageClass storage = clang::SC_None; 3343 uint32_t i; 3344 for (i = 0; i < num_attributes; ++i) { 3345 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3346 DWARFFormValue form_value; 3347 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3348 switch (attr) { 3349 case DW_AT_decl_file: 3350 decl.SetFile(comp_unit.GetSupportFiles().GetFileSpecAtIndex( 3351 form_value.Unsigned())); 3352 break; 3353 case DW_AT_decl_line: 3354 decl.SetLine(form_value.Unsigned()); 3355 break; 3356 case DW_AT_decl_column: 3357 decl.SetColumn(form_value.Unsigned()); 3358 break; 3359 case DW_AT_name: 3360 name = form_value.AsCString(); 3361 break; 3362 case DW_AT_type: 3363 param_type_die_form = form_value; 3364 break; 3365 case DW_AT_artificial: 3366 is_artificial = form_value.Boolean(); 3367 break; 3368 case DW_AT_location: 3369 case DW_AT_const_value: 3370 case DW_AT_default_value: 3371 case DW_AT_description: 3372 case DW_AT_endianity: 3373 case DW_AT_is_optional: 3374 case DW_AT_segment: 3375 case DW_AT_variable_parameter: 3376 default: 3377 case DW_AT_abstract_origin: 3378 case DW_AT_sibling: 3379 break; 3380 } 3381 } 3382 } 3383 3384 bool skip = false; 3385 if (skip_artificial && is_artificial) { 3386 // In order to determine if a C++ member function is "const" we 3387 // have to look at the const-ness of "this"... 3388 if (arg_idx == 0 && 3389 DeclKindIsCXXClass(containing_decl_ctx->getDeclKind()) && 3390 // Often times compilers omit the "this" name for the 3391 // specification DIEs, so we can't rely upon the name being in 3392 // the formal parameter DIE... 3393 (name == NULL || ::strcmp(name, "this") == 0)) { 3394 Type *this_type = die.ResolveTypeUID(DIERef(param_type_die_form)); 3395 if (this_type) { 3396 uint32_t encoding_mask = this_type->GetEncodingMask(); 3397 if (encoding_mask & Type::eEncodingIsPointerUID) { 3398 is_static = false; 3399 3400 if (encoding_mask & (1u << Type::eEncodingIsConstUID)) 3401 type_quals |= clang::Qualifiers::Const; 3402 if (encoding_mask & (1u << Type::eEncodingIsVolatileUID)) 3403 type_quals |= clang::Qualifiers::Volatile; 3404 } 3405 } 3406 } 3407 skip = true; 3408 } 3409 3410 if (!skip) { 3411 Type *type = die.ResolveTypeUID(DIERef(param_type_die_form)); 3412 if (type) { 3413 function_param_types.push_back(type->GetForwardCompilerType()); 3414 3415 clang::ParmVarDecl *param_var_decl = 3416 m_ast.CreateParameterDeclaration(containing_decl_ctx, name, 3417 type->GetForwardCompilerType(), 3418 storage); 3419 assert(param_var_decl); 3420 function_param_decls.push_back(param_var_decl); 3421 3422 m_ast.SetMetadataAsUserID(param_var_decl, die.GetID()); 3423 } 3424 } 3425 } 3426 arg_idx++; 3427 } break; 3428 3429 case DW_TAG_unspecified_parameters: 3430 is_variadic = true; 3431 break; 3432 3433 case DW_TAG_template_type_parameter: 3434 case DW_TAG_template_value_parameter: 3435 case DW_TAG_GNU_template_parameter_pack: 3436 // The one caller of this was never using the template_param_infos, and 3437 // the local variable was taking up a large amount of stack space in 3438 // SymbolFileDWARF::ParseType() so this was removed. If we ever need the 3439 // template params back, we can add them back. 3440 // ParseTemplateDIE (dwarf_cu, die, template_param_infos); 3441 has_template_params = true; 3442 break; 3443 3444 default: 3445 break; 3446 } 3447 } 3448 return arg_idx; 3449 } 3450 3451 llvm::Optional<SymbolFile::ArrayInfo> 3452 DWARFASTParser::ParseChildArrayInfo(const DWARFDIE &parent_die, 3453 const ExecutionContext *exe_ctx) { 3454 SymbolFile::ArrayInfo array_info; 3455 if (!parent_die) 3456 return llvm::None; 3457 3458 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 3459 die = die.GetSibling()) { 3460 const dw_tag_t tag = die.Tag(); 3461 switch (tag) { 3462 case DW_TAG_subrange_type: { 3463 DWARFAttributes attributes; 3464 const size_t num_child_attributes = die.GetAttributes(attributes); 3465 if (num_child_attributes > 0) { 3466 uint64_t num_elements = 0; 3467 uint64_t lower_bound = 0; 3468 uint64_t upper_bound = 0; 3469 bool upper_bound_valid = false; 3470 uint32_t i; 3471 for (i = 0; i < num_child_attributes; ++i) { 3472 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3473 DWARFFormValue form_value; 3474 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3475 switch (attr) { 3476 case DW_AT_name: 3477 break; 3478 3479 case DW_AT_count: 3480 if (DWARFDIE var_die = die.GetReferencedDIE(DW_AT_count)) { 3481 if (var_die.Tag() == DW_TAG_variable) 3482 if (exe_ctx) { 3483 if (auto frame = exe_ctx->GetFrameSP()) { 3484 Status error; 3485 lldb::VariableSP var_sp; 3486 auto valobj_sp = frame->GetValueForVariableExpressionPath( 3487 var_die.GetName(), eNoDynamicValues, 0, var_sp, 3488 error); 3489 if (valobj_sp) { 3490 num_elements = valobj_sp->GetValueAsUnsigned(0); 3491 break; 3492 } 3493 } 3494 } 3495 } else 3496 num_elements = form_value.Unsigned(); 3497 break; 3498 3499 case DW_AT_bit_stride: 3500 array_info.bit_stride = form_value.Unsigned(); 3501 break; 3502 3503 case DW_AT_byte_stride: 3504 array_info.byte_stride = form_value.Unsigned(); 3505 break; 3506 3507 case DW_AT_lower_bound: 3508 lower_bound = form_value.Unsigned(); 3509 break; 3510 3511 case DW_AT_upper_bound: 3512 upper_bound_valid = true; 3513 upper_bound = form_value.Unsigned(); 3514 break; 3515 3516 default: 3517 case DW_AT_abstract_origin: 3518 case DW_AT_accessibility: 3519 case DW_AT_allocated: 3520 case DW_AT_associated: 3521 case DW_AT_data_location: 3522 case DW_AT_declaration: 3523 case DW_AT_description: 3524 case DW_AT_sibling: 3525 case DW_AT_threads_scaled: 3526 case DW_AT_type: 3527 case DW_AT_visibility: 3528 break; 3529 } 3530 } 3531 } 3532 3533 if (num_elements == 0) { 3534 if (upper_bound_valid && upper_bound >= lower_bound) 3535 num_elements = upper_bound - lower_bound + 1; 3536 } 3537 3538 array_info.element_orders.push_back(num_elements); 3539 } 3540 } break; 3541 } 3542 } 3543 return array_info; 3544 } 3545 3546 Type *DWARFASTParserClang::GetTypeForDIE(const DWARFDIE &die) { 3547 if (die) { 3548 SymbolFileDWARF *dwarf = die.GetDWARF(); 3549 DWARFAttributes attributes; 3550 const size_t num_attributes = die.GetAttributes(attributes); 3551 if (num_attributes > 0) { 3552 DWARFFormValue type_die_form; 3553 for (size_t i = 0; i < num_attributes; ++i) { 3554 dw_attr_t attr = attributes.AttributeAtIndex(i); 3555 DWARFFormValue form_value; 3556 3557 if (attr == DW_AT_type && 3558 attributes.ExtractFormValueAtIndex(i, form_value)) 3559 return dwarf->ResolveTypeUID(dwarf->GetDIE(DIERef(form_value)), true); 3560 } 3561 } 3562 } 3563 3564 return nullptr; 3565 } 3566 3567 clang::Decl *DWARFASTParserClang::GetClangDeclForDIE(const DWARFDIE &die) { 3568 if (!die) 3569 return nullptr; 3570 3571 switch (die.Tag()) { 3572 case DW_TAG_variable: 3573 case DW_TAG_constant: 3574 case DW_TAG_formal_parameter: 3575 case DW_TAG_imported_declaration: 3576 case DW_TAG_imported_module: 3577 break; 3578 default: 3579 return nullptr; 3580 } 3581 3582 DIEToDeclMap::iterator cache_pos = m_die_to_decl.find(die.GetDIE()); 3583 if (cache_pos != m_die_to_decl.end()) 3584 return cache_pos->second; 3585 3586 if (DWARFDIE spec_die = die.GetReferencedDIE(DW_AT_specification)) { 3587 clang::Decl *decl = GetClangDeclForDIE(spec_die); 3588 m_die_to_decl[die.GetDIE()] = decl; 3589 m_decl_to_die[decl].insert(die.GetDIE()); 3590 return decl; 3591 } 3592 3593 if (DWARFDIE abstract_origin_die = 3594 die.GetReferencedDIE(DW_AT_abstract_origin)) { 3595 clang::Decl *decl = GetClangDeclForDIE(abstract_origin_die); 3596 m_die_to_decl[die.GetDIE()] = decl; 3597 m_decl_to_die[decl].insert(die.GetDIE()); 3598 return decl; 3599 } 3600 3601 clang::Decl *decl = nullptr; 3602 switch (die.Tag()) { 3603 case DW_TAG_variable: 3604 case DW_TAG_constant: 3605 case DW_TAG_formal_parameter: { 3606 SymbolFileDWARF *dwarf = die.GetDWARF(); 3607 Type *type = GetTypeForDIE(die); 3608 if (dwarf && type) { 3609 const char *name = die.GetName(); 3610 clang::DeclContext *decl_context = 3611 ClangASTContext::DeclContextGetAsDeclContext( 3612 dwarf->GetDeclContextContainingUID(die.GetID())); 3613 decl = m_ast.CreateVariableDeclaration( 3614 decl_context, name, 3615 ClangUtil::GetQualType(type->GetForwardCompilerType())); 3616 } 3617 break; 3618 } 3619 case DW_TAG_imported_declaration: { 3620 SymbolFileDWARF *dwarf = die.GetDWARF(); 3621 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3622 if (imported_uid) { 3623 CompilerDecl imported_decl = imported_uid.GetDecl(); 3624 if (imported_decl) { 3625 clang::DeclContext *decl_context = 3626 ClangASTContext::DeclContextGetAsDeclContext( 3627 dwarf->GetDeclContextContainingUID(die.GetID())); 3628 if (clang::NamedDecl *clang_imported_decl = 3629 llvm::dyn_cast<clang::NamedDecl>( 3630 (clang::Decl *)imported_decl.GetOpaqueDecl())) 3631 decl = 3632 m_ast.CreateUsingDeclaration(decl_context, clang_imported_decl); 3633 } 3634 } 3635 break; 3636 } 3637 case DW_TAG_imported_module: { 3638 SymbolFileDWARF *dwarf = die.GetDWARF(); 3639 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3640 3641 if (imported_uid) { 3642 CompilerDeclContext imported_decl_ctx = imported_uid.GetDeclContext(); 3643 if (imported_decl_ctx) { 3644 clang::DeclContext *decl_context = 3645 ClangASTContext::DeclContextGetAsDeclContext( 3646 dwarf->GetDeclContextContainingUID(die.GetID())); 3647 if (clang::NamespaceDecl *ns_decl = 3648 ClangASTContext::DeclContextGetAsNamespaceDecl( 3649 imported_decl_ctx)) 3650 decl = m_ast.CreateUsingDirectiveDeclaration(decl_context, ns_decl); 3651 } 3652 } 3653 break; 3654 } 3655 default: 3656 break; 3657 } 3658 3659 m_die_to_decl[die.GetDIE()] = decl; 3660 m_decl_to_die[decl].insert(die.GetDIE()); 3661 3662 return decl; 3663 } 3664 3665 clang::DeclContext * 3666 DWARFASTParserClang::GetClangDeclContextForDIE(const DWARFDIE &die) { 3667 if (die) { 3668 clang::DeclContext *decl_ctx = GetCachedClangDeclContextForDIE(die); 3669 if (decl_ctx) 3670 return decl_ctx; 3671 3672 bool try_parsing_type = true; 3673 switch (die.Tag()) { 3674 case DW_TAG_compile_unit: 3675 case DW_TAG_partial_unit: 3676 decl_ctx = m_ast.GetTranslationUnitDecl(); 3677 try_parsing_type = false; 3678 break; 3679 3680 case DW_TAG_namespace: 3681 decl_ctx = ResolveNamespaceDIE(die); 3682 try_parsing_type = false; 3683 break; 3684 3685 case DW_TAG_lexical_block: 3686 decl_ctx = GetDeclContextForBlock(die); 3687 try_parsing_type = false; 3688 break; 3689 3690 default: 3691 break; 3692 } 3693 3694 if (decl_ctx == nullptr && try_parsing_type) { 3695 Type *type = die.GetDWARF()->ResolveType(die); 3696 if (type) 3697 decl_ctx = GetCachedClangDeclContextForDIE(die); 3698 } 3699 3700 if (decl_ctx) { 3701 LinkDeclContextToDIE(decl_ctx, die); 3702 return decl_ctx; 3703 } 3704 } 3705 return nullptr; 3706 } 3707 3708 static bool IsSubroutine(const DWARFDIE &die) { 3709 switch (die.Tag()) { 3710 case DW_TAG_subprogram: 3711 case DW_TAG_inlined_subroutine: 3712 return true; 3713 default: 3714 return false; 3715 } 3716 } 3717 3718 static DWARFDIE GetContainingFunctionWithAbstractOrigin(const DWARFDIE &die) { 3719 for (DWARFDIE candidate = die; candidate; candidate = candidate.GetParent()) { 3720 if (IsSubroutine(candidate)) { 3721 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3722 return candidate; 3723 } else { 3724 return DWARFDIE(); 3725 } 3726 } 3727 } 3728 assert(0 && "Shouldn't call GetContainingFunctionWithAbstractOrigin on " 3729 "something not in a function"); 3730 return DWARFDIE(); 3731 } 3732 3733 static DWARFDIE FindAnyChildWithAbstractOrigin(const DWARFDIE &context) { 3734 for (DWARFDIE candidate = context.GetFirstChild(); candidate.IsValid(); 3735 candidate = candidate.GetSibling()) { 3736 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3737 return candidate; 3738 } 3739 } 3740 return DWARFDIE(); 3741 } 3742 3743 static DWARFDIE FindFirstChildWithAbstractOrigin(const DWARFDIE &block, 3744 const DWARFDIE &function) { 3745 assert(IsSubroutine(function)); 3746 for (DWARFDIE context = block; context != function.GetParent(); 3747 context = context.GetParent()) { 3748 assert(!IsSubroutine(context) || context == function); 3749 if (DWARFDIE child = FindAnyChildWithAbstractOrigin(context)) { 3750 return child; 3751 } 3752 } 3753 return DWARFDIE(); 3754 } 3755 3756 clang::DeclContext * 3757 DWARFASTParserClang::GetDeclContextForBlock(const DWARFDIE &die) { 3758 assert(die.Tag() == DW_TAG_lexical_block); 3759 DWARFDIE containing_function_with_abstract_origin = 3760 GetContainingFunctionWithAbstractOrigin(die); 3761 if (!containing_function_with_abstract_origin) { 3762 return (clang::DeclContext *)ResolveBlockDIE(die); 3763 } 3764 DWARFDIE child = FindFirstChildWithAbstractOrigin( 3765 die, containing_function_with_abstract_origin); 3766 CompilerDeclContext decl_context = 3767 GetDeclContextContainingUIDFromDWARF(child); 3768 return (clang::DeclContext *)decl_context.GetOpaqueDeclContext(); 3769 } 3770 3771 clang::BlockDecl *DWARFASTParserClang::ResolveBlockDIE(const DWARFDIE &die) { 3772 if (die && die.Tag() == DW_TAG_lexical_block) { 3773 clang::BlockDecl *decl = 3774 llvm::cast_or_null<clang::BlockDecl>(m_die_to_decl_ctx[die.GetDIE()]); 3775 3776 if (!decl) { 3777 DWARFDIE decl_context_die; 3778 clang::DeclContext *decl_context = 3779 GetClangDeclContextContainingDIE(die, &decl_context_die); 3780 decl = m_ast.CreateBlockDeclaration(decl_context); 3781 3782 if (decl) 3783 LinkDeclContextToDIE((clang::DeclContext *)decl, die); 3784 } 3785 3786 return decl; 3787 } 3788 return nullptr; 3789 } 3790 3791 clang::NamespaceDecl * 3792 DWARFASTParserClang::ResolveNamespaceDIE(const DWARFDIE &die) { 3793 if (die && die.Tag() == DW_TAG_namespace) { 3794 // See if we already parsed this namespace DIE and associated it with a 3795 // uniqued namespace declaration 3796 clang::NamespaceDecl *namespace_decl = 3797 static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die.GetDIE()]); 3798 if (namespace_decl) 3799 return namespace_decl; 3800 else { 3801 const char *namespace_name = die.GetName(); 3802 clang::DeclContext *containing_decl_ctx = 3803 GetClangDeclContextContainingDIE(die, nullptr); 3804 bool is_inline = 3805 die.GetAttributeValueAsUnsigned(DW_AT_export_symbols, 0) != 0; 3806 3807 namespace_decl = m_ast.GetUniqueNamespaceDeclaration( 3808 namespace_name, containing_decl_ctx, is_inline); 3809 Log *log = 3810 nullptr; // (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 3811 if (log) { 3812 SymbolFileDWARF *dwarf = die.GetDWARF(); 3813 if (namespace_name) { 3814 dwarf->GetObjectFile()->GetModule()->LogMessage( 3815 log, "ASTContext => %p: 0x%8.8" PRIx64 3816 ": DW_TAG_namespace with DW_AT_name(\"%s\") => " 3817 "clang::NamespaceDecl *%p (original = %p)", 3818 static_cast<void *>(m_ast.getASTContext()), die.GetID(), 3819 namespace_name, static_cast<void *>(namespace_decl), 3820 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3821 } else { 3822 dwarf->GetObjectFile()->GetModule()->LogMessage( 3823 log, "ASTContext => %p: 0x%8.8" PRIx64 3824 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p " 3825 "(original = %p)", 3826 static_cast<void *>(m_ast.getASTContext()), die.GetID(), 3827 static_cast<void *>(namespace_decl), 3828 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3829 } 3830 } 3831 3832 if (namespace_decl) 3833 LinkDeclContextToDIE((clang::DeclContext *)namespace_decl, die); 3834 return namespace_decl; 3835 } 3836 } 3837 return nullptr; 3838 } 3839 3840 clang::DeclContext *DWARFASTParserClang::GetClangDeclContextContainingDIE( 3841 const DWARFDIE &die, DWARFDIE *decl_ctx_die_copy) { 3842 SymbolFileDWARF *dwarf = die.GetDWARF(); 3843 3844 DWARFDIE decl_ctx_die = dwarf->GetDeclContextDIEContainingDIE(die); 3845 3846 if (decl_ctx_die_copy) 3847 *decl_ctx_die_copy = decl_ctx_die; 3848 3849 if (decl_ctx_die) { 3850 clang::DeclContext *clang_decl_ctx = 3851 GetClangDeclContextForDIE(decl_ctx_die); 3852 if (clang_decl_ctx) 3853 return clang_decl_ctx; 3854 } 3855 return m_ast.GetTranslationUnitDecl(); 3856 } 3857 3858 clang::DeclContext * 3859 DWARFASTParserClang::GetCachedClangDeclContextForDIE(const DWARFDIE &die) { 3860 if (die) { 3861 DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find(die.GetDIE()); 3862 if (pos != m_die_to_decl_ctx.end()) 3863 return pos->second; 3864 } 3865 return nullptr; 3866 } 3867 3868 void DWARFASTParserClang::LinkDeclContextToDIE(clang::DeclContext *decl_ctx, 3869 const DWARFDIE &die) { 3870 m_die_to_decl_ctx[die.GetDIE()] = decl_ctx; 3871 // There can be many DIEs for a single decl context 3872 // m_decl_ctx_to_die[decl_ctx].insert(die.GetDIE()); 3873 m_decl_ctx_to_die.insert(std::make_pair(decl_ctx, die)); 3874 } 3875 3876 bool DWARFASTParserClang::CopyUniqueClassMethodTypes( 3877 const DWARFDIE &src_class_die, const DWARFDIE &dst_class_die, 3878 lldb_private::Type *class_type, std::vector<DWARFDIE> &failures) { 3879 if (!class_type || !src_class_die || !dst_class_die) 3880 return false; 3881 if (src_class_die.Tag() != dst_class_die.Tag()) 3882 return false; 3883 3884 // We need to complete the class type so we can get all of the method types 3885 // parsed so we can then unique those types to their equivalent counterparts 3886 // in "dst_cu" and "dst_class_die" 3887 class_type->GetFullCompilerType(); 3888 3889 DWARFDIE src_die; 3890 DWARFDIE dst_die; 3891 UniqueCStringMap<DWARFDIE> src_name_to_die; 3892 UniqueCStringMap<DWARFDIE> dst_name_to_die; 3893 UniqueCStringMap<DWARFDIE> src_name_to_die_artificial; 3894 UniqueCStringMap<DWARFDIE> dst_name_to_die_artificial; 3895 for (src_die = src_class_die.GetFirstChild(); src_die.IsValid(); 3896 src_die = src_die.GetSibling()) { 3897 if (src_die.Tag() == DW_TAG_subprogram) { 3898 // Make sure this is a declaration and not a concrete instance by looking 3899 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3900 // are placed inside the class definitions and shouldn't be included in 3901 // the list of things are are tracking here. 3902 if (src_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 3903 const char *src_name = src_die.GetMangledName(); 3904 if (src_name) { 3905 ConstString src_const_name(src_name); 3906 if (src_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3907 src_name_to_die_artificial.Append(src_const_name, src_die); 3908 else 3909 src_name_to_die.Append(src_const_name, src_die); 3910 } 3911 } 3912 } 3913 } 3914 for (dst_die = dst_class_die.GetFirstChild(); dst_die.IsValid(); 3915 dst_die = dst_die.GetSibling()) { 3916 if (dst_die.Tag() == DW_TAG_subprogram) { 3917 // Make sure this is a declaration and not a concrete instance by looking 3918 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3919 // are placed inside the class definitions and shouldn't be included in 3920 // the list of things are are tracking here. 3921 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 3922 const char *dst_name = dst_die.GetMangledName(); 3923 if (dst_name) { 3924 ConstString dst_const_name(dst_name); 3925 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3926 dst_name_to_die_artificial.Append(dst_const_name, dst_die); 3927 else 3928 dst_name_to_die.Append(dst_const_name, dst_die); 3929 } 3930 } 3931 } 3932 } 3933 const uint32_t src_size = src_name_to_die.GetSize(); 3934 const uint32_t dst_size = dst_name_to_die.GetSize(); 3935 Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | 3936 // DWARF_LOG_TYPE_COMPLETION)); 3937 3938 // Is everything kosher so we can go through the members at top speed? 3939 bool fast_path = true; 3940 3941 if (src_size != dst_size) { 3942 if (src_size != 0 && dst_size != 0) { 3943 if (log) 3944 log->Printf("warning: trying to unique class DIE 0x%8.8x to 0x%8.8x, " 3945 "but they didn't have the same size (src=%d, dst=%d)", 3946 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3947 src_size, dst_size); 3948 } 3949 3950 fast_path = false; 3951 } 3952 3953 uint32_t idx; 3954 3955 if (fast_path) { 3956 for (idx = 0; idx < src_size; ++idx) { 3957 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 3958 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3959 3960 if (src_die.Tag() != dst_die.Tag()) { 3961 if (log) 3962 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 3963 "but 0x%8.8x (%s) tags didn't match 0x%8.8x (%s)", 3964 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3965 src_die.GetOffset(), src_die.GetTagAsCString(), 3966 dst_die.GetOffset(), dst_die.GetTagAsCString()); 3967 fast_path = false; 3968 } 3969 3970 const char *src_name = src_die.GetMangledName(); 3971 const char *dst_name = dst_die.GetMangledName(); 3972 3973 // Make sure the names match 3974 if (src_name == dst_name || (strcmp(src_name, dst_name) == 0)) 3975 continue; 3976 3977 if (log) 3978 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 3979 "but 0x%8.8x (%s) names didn't match 0x%8.8x (%s)", 3980 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3981 src_die.GetOffset(), src_name, dst_die.GetOffset(), 3982 dst_name); 3983 3984 fast_path = false; 3985 } 3986 } 3987 3988 DWARFASTParserClang *src_dwarf_ast_parser = 3989 (DWARFASTParserClang *)src_die.GetDWARFParser(); 3990 DWARFASTParserClang *dst_dwarf_ast_parser = 3991 (DWARFASTParserClang *)dst_die.GetDWARFParser(); 3992 3993 // Now do the work of linking the DeclContexts and Types. 3994 if (fast_path) { 3995 // We can do this quickly. Just run across the tables index-for-index 3996 // since we know each node has matching names and tags. 3997 for (idx = 0; idx < src_size; ++idx) { 3998 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 3999 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 4000 4001 clang::DeclContext *src_decl_ctx = 4002 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4003 if (src_decl_ctx) { 4004 if (log) 4005 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4006 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 4007 dst_die.GetOffset()); 4008 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 4009 } else { 4010 if (log) 4011 log->Printf("warning: tried to unique decl context from 0x%8.8x for " 4012 "0x%8.8x, but none was found", 4013 src_die.GetOffset(), dst_die.GetOffset()); 4014 } 4015 4016 Type *src_child_type = 4017 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4018 if (src_child_type) { 4019 if (log) 4020 log->Printf( 4021 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 4022 static_cast<void *>(src_child_type), src_child_type->GetID(), 4023 src_die.GetOffset(), dst_die.GetOffset()); 4024 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 4025 } else { 4026 if (log) 4027 log->Printf("warning: tried to unique lldb_private::Type from " 4028 "0x%8.8x for 0x%8.8x, but none was found", 4029 src_die.GetOffset(), dst_die.GetOffset()); 4030 } 4031 } 4032 } else { 4033 // We must do this slowly. For each member of the destination, look up a 4034 // member in the source with the same name, check its tag, and unique them 4035 // if everything matches up. Report failures. 4036 4037 if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty()) { 4038 src_name_to_die.Sort(); 4039 4040 for (idx = 0; idx < dst_size; ++idx) { 4041 ConstString dst_name = dst_name_to_die.GetCStringAtIndex(idx); 4042 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 4043 src_die = src_name_to_die.Find(dst_name, DWARFDIE()); 4044 4045 if (src_die && (src_die.Tag() == dst_die.Tag())) { 4046 clang::DeclContext *src_decl_ctx = 4047 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4048 if (src_decl_ctx) { 4049 if (log) 4050 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4051 static_cast<void *>(src_decl_ctx), 4052 src_die.GetOffset(), dst_die.GetOffset()); 4053 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 4054 } else { 4055 if (log) 4056 log->Printf("warning: tried to unique decl context from 0x%8.8x " 4057 "for 0x%8.8x, but none was found", 4058 src_die.GetOffset(), dst_die.GetOffset()); 4059 } 4060 4061 Type *src_child_type = 4062 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4063 if (src_child_type) { 4064 if (log) 4065 log->Printf("uniquing type %p (uid=0x%" PRIx64 4066 ") from 0x%8.8x for 0x%8.8x", 4067 static_cast<void *>(src_child_type), 4068 src_child_type->GetID(), src_die.GetOffset(), 4069 dst_die.GetOffset()); 4070 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = 4071 src_child_type; 4072 } else { 4073 if (log) 4074 log->Printf("warning: tried to unique lldb_private::Type from " 4075 "0x%8.8x for 0x%8.8x, but none was found", 4076 src_die.GetOffset(), dst_die.GetOffset()); 4077 } 4078 } else { 4079 if (log) 4080 log->Printf("warning: couldn't find a match for 0x%8.8x", 4081 dst_die.GetOffset()); 4082 4083 failures.push_back(dst_die); 4084 } 4085 } 4086 } 4087 } 4088 4089 const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize(); 4090 const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize(); 4091 4092 if (src_size_artificial && dst_size_artificial) { 4093 dst_name_to_die_artificial.Sort(); 4094 4095 for (idx = 0; idx < src_size_artificial; ++idx) { 4096 ConstString src_name_artificial = 4097 src_name_to_die_artificial.GetCStringAtIndex(idx); 4098 src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 4099 dst_die = 4100 dst_name_to_die_artificial.Find(src_name_artificial, DWARFDIE()); 4101 4102 if (dst_die) { 4103 // Both classes have the artificial types, link them 4104 clang::DeclContext *src_decl_ctx = 4105 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4106 if (src_decl_ctx) { 4107 if (log) 4108 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4109 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 4110 dst_die.GetOffset()); 4111 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 4112 } else { 4113 if (log) 4114 log->Printf("warning: tried to unique decl context from 0x%8.8x " 4115 "for 0x%8.8x, but none was found", 4116 src_die.GetOffset(), dst_die.GetOffset()); 4117 } 4118 4119 Type *src_child_type = 4120 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4121 if (src_child_type) { 4122 if (log) 4123 log->Printf( 4124 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 4125 static_cast<void *>(src_child_type), src_child_type->GetID(), 4126 src_die.GetOffset(), dst_die.GetOffset()); 4127 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 4128 } else { 4129 if (log) 4130 log->Printf("warning: tried to unique lldb_private::Type from " 4131 "0x%8.8x for 0x%8.8x, but none was found", 4132 src_die.GetOffset(), dst_die.GetOffset()); 4133 } 4134 } 4135 } 4136 } 4137 4138 if (dst_size_artificial) { 4139 for (idx = 0; idx < dst_size_artificial; ++idx) { 4140 ConstString dst_name_artificial = 4141 dst_name_to_die_artificial.GetCStringAtIndex(idx); 4142 dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 4143 if (log) 4144 log->Printf("warning: need to create artificial method for 0x%8.8x for " 4145 "method '%s'", 4146 dst_die.GetOffset(), dst_name_artificial.GetCString()); 4147 4148 failures.push_back(dst_die); 4149 } 4150 } 4151 4152 return !failures.empty(); 4153 } 4154