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 dwarf->GetUID(DIERef(encoding_uid)), 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->GetDIE(type_sp->GetID())); 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 if (calling_convention == llvm::dwarf::DW_CC_pass_by_reference) { 963 clang::CXXRecordDecl *record_decl = 964 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 965 if (record_decl) 966 record_decl->setArgPassingRestrictions( 967 clang::RecordDecl::APK_CannotPassInRegs); 968 } 969 970 } break; 971 972 case DW_TAG_enumeration_type: { 973 // Set a bit that lets us know that we are currently parsing this 974 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 975 976 bool is_scoped = false; 977 DWARFFormValue encoding_form; 978 979 const size_t num_attributes = die.GetAttributes(attributes); 980 if (num_attributes > 0) { 981 uint32_t i; 982 983 for (i = 0; i < num_attributes; ++i) { 984 attr = attributes.AttributeAtIndex(i); 985 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 986 switch (attr) { 987 case DW_AT_decl_file: 988 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 989 form_value.Unsigned())); 990 break; 991 case DW_AT_decl_line: 992 decl.SetLine(form_value.Unsigned()); 993 break; 994 case DW_AT_decl_column: 995 decl.SetColumn(form_value.Unsigned()); 996 break; 997 case DW_AT_name: 998 type_name_cstr = form_value.AsCString(); 999 type_name_const_str.SetCString(type_name_cstr); 1000 break; 1001 case DW_AT_type: 1002 encoding_form = form_value; 1003 break; 1004 case DW_AT_byte_size: 1005 byte_size = form_value.Unsigned(); 1006 break; 1007 case DW_AT_accessibility: 1008 break; // accessibility = 1009 // DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 1010 case DW_AT_declaration: 1011 is_forward_declaration = form_value.Boolean(); 1012 break; 1013 case DW_AT_enum_class: 1014 is_scoped = form_value.Boolean(); 1015 break; 1016 case DW_AT_allocated: 1017 case DW_AT_associated: 1018 case DW_AT_bit_stride: 1019 case DW_AT_byte_stride: 1020 case DW_AT_data_location: 1021 case DW_AT_description: 1022 case DW_AT_start_scope: 1023 case DW_AT_visibility: 1024 case DW_AT_specification: 1025 case DW_AT_abstract_origin: 1026 case DW_AT_sibling: 1027 break; 1028 } 1029 } 1030 } 1031 1032 if (is_forward_declaration) { 1033 type_sp = ParseTypeFromDWO(die, log); 1034 if (type_sp) 1035 return type_sp; 1036 1037 DWARFDeclContext die_decl_ctx; 1038 die.GetDWARFDeclContext(die_decl_ctx); 1039 1040 type_sp = 1041 dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx); 1042 1043 if (!type_sp) { 1044 SymbolFileDWARFDebugMap *debug_map_symfile = 1045 dwarf->GetDebugMapSymfile(); 1046 if (debug_map_symfile) { 1047 // We weren't able to find a full declaration in this DWARF, 1048 // see if we have a declaration anywhere else... 1049 type_sp = 1050 debug_map_symfile->FindDefinitionTypeForDWARFDeclContext( 1051 die_decl_ctx); 1052 } 1053 } 1054 1055 if (type_sp) { 1056 if (log) { 1057 dwarf->GetObjectFile()->GetModule()->LogMessage( 1058 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 1059 "forward declaration, complete type is 0x%8.8" PRIx64, 1060 static_cast<void *>(this), die.GetOffset(), 1061 DW_TAG_value_to_name(tag), type_name_cstr, 1062 type_sp->GetID()); 1063 } 1064 1065 // We found a real definition for this type elsewhere so lets use 1066 // it and cache the fact that we found a complete type for this 1067 // die 1068 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1069 clang::DeclContext *defn_decl_ctx = 1070 GetCachedClangDeclContextForDIE( 1071 dwarf->GetDIE(type_sp->GetID())); 1072 if (defn_decl_ctx) 1073 LinkDeclContextToDIE(defn_decl_ctx, die); 1074 return type_sp; 1075 } 1076 } 1077 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1078 DW_TAG_value_to_name(tag), type_name_cstr); 1079 1080 CompilerType enumerator_clang_type; 1081 clang_type.SetCompilerType( 1082 &m_ast, 1083 dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE())); 1084 if (!clang_type) { 1085 if (encoding_form.IsValid()) { 1086 Type *enumerator_type = 1087 dwarf->ResolveTypeUID(DIERef(encoding_form)); 1088 if (enumerator_type) 1089 enumerator_clang_type = enumerator_type->GetFullCompilerType(); 1090 } 1091 1092 if (!enumerator_clang_type) { 1093 if (byte_size) { 1094 enumerator_clang_type = 1095 m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize( 1096 NULL, DW_ATE_signed, *byte_size * 8); 1097 } else { 1098 enumerator_clang_type = m_ast.GetBasicType(eBasicTypeInt); 1099 } 1100 } 1101 1102 clang_type = m_ast.CreateEnumerationType( 1103 type_name_cstr, GetClangDeclContextContainingDIE(die, nullptr), 1104 decl, enumerator_clang_type, is_scoped); 1105 } else { 1106 enumerator_clang_type = 1107 m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType()); 1108 } 1109 1110 LinkDeclContextToDIE( 1111 ClangASTContext::GetDeclContextForType(clang_type), die); 1112 1113 type_sp = std::make_shared<Type>( 1114 die.GetID(), dwarf, type_name_const_str, byte_size, nullptr, 1115 dwarf->GetUID(DIERef(encoding_form)), Type::eEncodingIsUID, &decl, 1116 clang_type, Type::eResolveStateForward); 1117 1118 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 1119 if (die.HasChildren()) { 1120 SymbolContext cu_sc(die.GetLLDBCompileUnit()); 1121 bool is_signed = false; 1122 enumerator_clang_type.IsIntegerType(is_signed); 1123 ParseChildEnumerators(cu_sc, clang_type, is_signed, 1124 type_sp->GetByteSize().getValueOr(0), die); 1125 } 1126 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 1127 } else { 1128 dwarf->GetObjectFile()->GetModule()->ReportError( 1129 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 1130 "definition.\nPlease file a bug and attach the file at the " 1131 "start of this error message", 1132 die.GetOffset(), type_name_cstr); 1133 } 1134 } 1135 } break; 1136 1137 case DW_TAG_inlined_subroutine: 1138 case DW_TAG_subprogram: 1139 case DW_TAG_subroutine_type: { 1140 // Set a bit that lets us know that we are currently parsing this 1141 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1142 1143 DWARFFormValue type_die_form; 1144 bool is_variadic = false; 1145 bool is_inline = false; 1146 bool is_static = false; 1147 bool is_virtual = false; 1148 bool is_explicit = false; 1149 bool is_artificial = false; 1150 bool has_template_params = false; 1151 DWARFFormValue specification_die_form; 1152 DWARFFormValue abstract_origin_die_form; 1153 dw_offset_t object_pointer_die_offset = DW_INVALID_OFFSET; 1154 1155 unsigned type_quals = 0; 1156 clang::StorageClass storage = 1157 clang::SC_None; //, Extern, Static, PrivateExtern 1158 1159 const size_t num_attributes = die.GetAttributes(attributes); 1160 if (num_attributes > 0) { 1161 uint32_t i; 1162 for (i = 0; i < num_attributes; ++i) { 1163 attr = attributes.AttributeAtIndex(i); 1164 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1165 switch (attr) { 1166 case DW_AT_decl_file: 1167 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 1168 form_value.Unsigned())); 1169 break; 1170 case DW_AT_decl_line: 1171 decl.SetLine(form_value.Unsigned()); 1172 break; 1173 case DW_AT_decl_column: 1174 decl.SetColumn(form_value.Unsigned()); 1175 break; 1176 case DW_AT_name: 1177 type_name_cstr = form_value.AsCString(); 1178 type_name_const_str.SetCString(type_name_cstr); 1179 break; 1180 1181 case DW_AT_linkage_name: 1182 case DW_AT_MIPS_linkage_name: 1183 mangled_name_cstr = form_value.AsCString(); 1184 break; 1185 case DW_AT_type: 1186 type_die_form = form_value; 1187 break; 1188 case DW_AT_accessibility: 1189 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 1190 break; 1191 case DW_AT_declaration: 1192 break; // is_forward_declaration = form_value.Boolean(); break; 1193 case DW_AT_inline: 1194 is_inline = form_value.Boolean(); 1195 break; 1196 case DW_AT_virtuality: 1197 is_virtual = form_value.Boolean(); 1198 break; 1199 case DW_AT_explicit: 1200 is_explicit = form_value.Boolean(); 1201 break; 1202 case DW_AT_artificial: 1203 is_artificial = form_value.Boolean(); 1204 break; 1205 1206 case DW_AT_external: 1207 if (form_value.Unsigned()) { 1208 if (storage == clang::SC_None) 1209 storage = clang::SC_Extern; 1210 else 1211 storage = clang::SC_PrivateExtern; 1212 } 1213 break; 1214 1215 case DW_AT_specification: 1216 specification_die_form = form_value; 1217 break; 1218 1219 case DW_AT_abstract_origin: 1220 abstract_origin_die_form = form_value; 1221 break; 1222 1223 case DW_AT_object_pointer: 1224 object_pointer_die_offset = form_value.Reference(); 1225 break; 1226 1227 case DW_AT_allocated: 1228 case DW_AT_associated: 1229 case DW_AT_address_class: 1230 case DW_AT_calling_convention: 1231 case DW_AT_data_location: 1232 case DW_AT_elemental: 1233 case DW_AT_entry_pc: 1234 case DW_AT_frame_base: 1235 case DW_AT_high_pc: 1236 case DW_AT_low_pc: 1237 case DW_AT_prototyped: 1238 case DW_AT_pure: 1239 case DW_AT_ranges: 1240 case DW_AT_recursive: 1241 case DW_AT_return_addr: 1242 case DW_AT_segment: 1243 case DW_AT_start_scope: 1244 case DW_AT_static_link: 1245 case DW_AT_trampoline: 1246 case DW_AT_visibility: 1247 case DW_AT_vtable_elem_location: 1248 case DW_AT_description: 1249 case DW_AT_sibling: 1250 break; 1251 } 1252 } 1253 } 1254 } 1255 1256 std::string object_pointer_name; 1257 if (object_pointer_die_offset != DW_INVALID_OFFSET) { 1258 DWARFDIE object_pointer_die = die.GetDIE(object_pointer_die_offset); 1259 if (object_pointer_die) { 1260 const char *object_pointer_name_cstr = object_pointer_die.GetName(); 1261 if (object_pointer_name_cstr) 1262 object_pointer_name = object_pointer_name_cstr; 1263 } 1264 } 1265 1266 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1267 DW_TAG_value_to_name(tag), type_name_cstr); 1268 1269 CompilerType return_clang_type; 1270 Type *func_type = NULL; 1271 1272 if (type_die_form.IsValid()) 1273 func_type = dwarf->ResolveTypeUID(DIERef(type_die_form)); 1274 1275 if (func_type) 1276 return_clang_type = func_type->GetForwardCompilerType(); 1277 else 1278 return_clang_type = m_ast.GetBasicType(eBasicTypeVoid); 1279 1280 std::vector<CompilerType> function_param_types; 1281 std::vector<clang::ParmVarDecl *> function_param_decls; 1282 1283 // Parse the function children for the parameters 1284 1285 DWARFDIE decl_ctx_die; 1286 clang::DeclContext *containing_decl_ctx = 1287 GetClangDeclContextContainingDIE(die, &decl_ctx_die); 1288 const clang::Decl::Kind containing_decl_kind = 1289 containing_decl_ctx->getDeclKind(); 1290 1291 bool is_cxx_method = DeclKindIsCXXClass(containing_decl_kind); 1292 // Start off static. This will be set to false in 1293 // ParseChildParameters(...) if we find a "this" parameters as the 1294 // first parameter 1295 if (is_cxx_method) { 1296 is_static = true; 1297 } 1298 1299 if (die.HasChildren()) { 1300 bool skip_artificial = true; 1301 ParseChildParameters(*sc.comp_unit, containing_decl_ctx, die, 1302 skip_artificial, is_static, is_variadic, 1303 has_template_params, function_param_types, 1304 function_param_decls, type_quals); 1305 } 1306 1307 bool ignore_containing_context = false; 1308 // Check for templatized class member functions. If we had any 1309 // DW_TAG_template_type_parameter or DW_TAG_template_value_parameter 1310 // the DW_TAG_subprogram DIE, then we can't let this become a method in 1311 // a class. Why? Because templatized functions are only emitted if one 1312 // of the templatized methods is used in the current compile unit and 1313 // we will end up with classes that may or may not include these member 1314 // functions and this means one class won't match another class 1315 // definition and it affects our ability to use a class in the clang 1316 // expression parser. So for the greater good, we currently must not 1317 // allow any template member functions in a class definition. 1318 if (is_cxx_method && has_template_params) { 1319 ignore_containing_context = true; 1320 is_cxx_method = false; 1321 } 1322 1323 // clang_type will get the function prototype clang type after this 1324 // call 1325 clang_type = m_ast.CreateFunctionType( 1326 return_clang_type, function_param_types.data(), 1327 function_param_types.size(), is_variadic, type_quals); 1328 1329 if (type_name_cstr) { 1330 bool type_handled = false; 1331 if (tag == DW_TAG_subprogram || tag == DW_TAG_inlined_subroutine) { 1332 ObjCLanguage::MethodName objc_method(type_name_cstr, true); 1333 if (objc_method.IsValid(true)) { 1334 CompilerType class_opaque_type; 1335 ConstString class_name(objc_method.GetClassName()); 1336 if (class_name) { 1337 TypeSP complete_objc_class_type_sp( 1338 dwarf->FindCompleteObjCDefinitionTypeForDIE( 1339 DWARFDIE(), class_name, false)); 1340 1341 if (complete_objc_class_type_sp) { 1342 CompilerType type_clang_forward_type = 1343 complete_objc_class_type_sp->GetForwardCompilerType(); 1344 if (ClangASTContext::IsObjCObjectOrInterfaceType( 1345 type_clang_forward_type)) 1346 class_opaque_type = type_clang_forward_type; 1347 } 1348 } 1349 1350 if (class_opaque_type) { 1351 // If accessibility isn't set to anything valid, assume public 1352 // for now... 1353 if (accessibility == eAccessNone) 1354 accessibility = eAccessPublic; 1355 1356 clang::ObjCMethodDecl *objc_method_decl = 1357 m_ast.AddMethodToObjCObjectType( 1358 class_opaque_type, type_name_cstr, clang_type, 1359 accessibility, is_artificial, is_variadic); 1360 type_handled = objc_method_decl != NULL; 1361 if (type_handled) { 1362 LinkDeclContextToDIE( 1363 ClangASTContext::GetAsDeclContext(objc_method_decl), die); 1364 m_ast.SetMetadataAsUserID(objc_method_decl, die.GetID()); 1365 } else { 1366 dwarf->GetObjectFile()->GetModule()->ReportError( 1367 "{0x%8.8x}: invalid Objective-C method 0x%4.4x (%s), " 1368 "please file a bug and attach the file at the start of " 1369 "this error message", 1370 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 1371 } 1372 } 1373 } else if (is_cxx_method) { 1374 // Look at the parent of this DIE and see if is is a class or 1375 // struct and see if this is actually a C++ method 1376 Type *class_type = dwarf->ResolveType(decl_ctx_die); 1377 if (class_type) { 1378 bool alternate_defn = false; 1379 if (class_type->GetID() != decl_ctx_die.GetID() || 1380 decl_ctx_die.GetContainingDWOModuleDIE()) { 1381 alternate_defn = true; 1382 1383 // We uniqued the parent class of this function to another 1384 // class so we now need to associate all dies under 1385 // "decl_ctx_die" to DIEs in the DIE for "class_type"... 1386 DWARFDIE class_type_die = dwarf->GetDIE(class_type->GetID()); 1387 1388 if (class_type_die) { 1389 std::vector<DWARFDIE> failures; 1390 1391 CopyUniqueClassMethodTypes(decl_ctx_die, class_type_die, 1392 class_type, failures); 1393 1394 // FIXME do something with these failures that's smarter 1395 // than 1396 // just dropping them on the ground. Unfortunately classes 1397 // don't like having stuff added to them after their 1398 // definitions are complete... 1399 1400 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1401 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1402 type_sp = type_ptr->shared_from_this(); 1403 break; 1404 } 1405 } 1406 } 1407 1408 if (specification_die_form.IsValid()) { 1409 // We have a specification which we are going to base our 1410 // function prototype off of, so we need this type to be 1411 // completed so that the m_die_to_decl_ctx for the method in 1412 // the specification has a valid clang decl context. 1413 class_type->GetForwardCompilerType(); 1414 // If we have a specification, then the function type should 1415 // have been made with the specification and not with this 1416 // die. 1417 DWARFDIE spec_die = dwarf->DebugInfo()->GetDIE( 1418 DIERef(specification_die_form)); 1419 clang::DeclContext *spec_clang_decl_ctx = 1420 GetClangDeclContextForDIE(spec_die); 1421 if (spec_clang_decl_ctx) { 1422 LinkDeclContextToDIE(spec_clang_decl_ctx, die); 1423 } else { 1424 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1425 "0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8" PRIx64 1426 ") has no decl\n", 1427 die.GetID(), specification_die_form.Reference()); 1428 } 1429 type_handled = true; 1430 } else if (abstract_origin_die_form.IsValid()) { 1431 // We have a specification which we are going to base our 1432 // function prototype off of, so we need this type to be 1433 // completed so that the m_die_to_decl_ctx for the method in 1434 // the abstract origin has a valid clang decl context. 1435 class_type->GetForwardCompilerType(); 1436 1437 DWARFDIE abs_die = dwarf->DebugInfo()->GetDIE( 1438 DIERef(abstract_origin_die_form)); 1439 clang::DeclContext *abs_clang_decl_ctx = 1440 GetClangDeclContextForDIE(abs_die); 1441 if (abs_clang_decl_ctx) { 1442 LinkDeclContextToDIE(abs_clang_decl_ctx, die); 1443 } else { 1444 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1445 "0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8" PRIx64 1446 ") has no decl\n", 1447 die.GetID(), abstract_origin_die_form.Reference()); 1448 } 1449 type_handled = true; 1450 } else { 1451 CompilerType class_opaque_type = 1452 class_type->GetForwardCompilerType(); 1453 if (ClangASTContext::IsCXXClassType(class_opaque_type)) { 1454 if (class_opaque_type.IsBeingDefined() || alternate_defn) { 1455 if (!is_static && !die.HasChildren()) { 1456 // We have a C++ member function with no children (this 1457 // pointer!) and clang will get mad if we try and make 1458 // a function that isn't well formed in the DWARF, so 1459 // we will just skip it... 1460 type_handled = true; 1461 } else { 1462 bool add_method = true; 1463 if (alternate_defn) { 1464 // If an alternate definition for the class exists, 1465 // then add the method only if an equivalent is not 1466 // already present. 1467 clang::CXXRecordDecl *record_decl = 1468 m_ast.GetAsCXXRecordDecl( 1469 class_opaque_type.GetOpaqueQualType()); 1470 if (record_decl) { 1471 for (auto method_iter = record_decl->method_begin(); 1472 method_iter != record_decl->method_end(); 1473 method_iter++) { 1474 clang::CXXMethodDecl *method_decl = *method_iter; 1475 if (method_decl->getNameInfo().getAsString() == 1476 std::string(type_name_cstr)) { 1477 if (method_decl->getType() == 1478 ClangUtil::GetQualType(clang_type)) { 1479 add_method = false; 1480 LinkDeclContextToDIE( 1481 ClangASTContext::GetAsDeclContext( 1482 method_decl), 1483 die); 1484 type_handled = true; 1485 1486 break; 1487 } 1488 } 1489 } 1490 } 1491 } 1492 1493 if (add_method) { 1494 llvm::PrettyStackTraceFormat stack_trace( 1495 "SymbolFileDWARF::ParseType() is adding a method " 1496 "%s to class %s in DIE 0x%8.8" PRIx64 " from %s", 1497 type_name_cstr, 1498 class_type->GetName().GetCString(), die.GetID(), 1499 dwarf->GetObjectFile() 1500 ->GetFileSpec() 1501 .GetPath() 1502 .c_str()); 1503 1504 const bool is_attr_used = false; 1505 // Neither GCC 4.2 nor clang++ currently set a valid 1506 // accessibility in the DWARF for C++ methods... 1507 // Default to public for now... 1508 if (accessibility == eAccessNone) 1509 accessibility = eAccessPublic; 1510 1511 clang::CXXMethodDecl *cxx_method_decl = 1512 m_ast.AddMethodToCXXRecordType( 1513 class_opaque_type.GetOpaqueQualType(), 1514 type_name_cstr, mangled_name_cstr, clang_type, 1515 accessibility, is_virtual, is_static, 1516 is_inline, is_explicit, is_attr_used, 1517 is_artificial); 1518 1519 type_handled = cxx_method_decl != NULL; 1520 1521 if (type_handled) { 1522 LinkDeclContextToDIE( 1523 ClangASTContext::GetAsDeclContext( 1524 cxx_method_decl), 1525 die); 1526 1527 ClangASTMetadata metadata; 1528 metadata.SetUserID(die.GetID()); 1529 1530 if (!object_pointer_name.empty()) { 1531 metadata.SetObjectPtrName( 1532 object_pointer_name.c_str()); 1533 if (log) 1534 log->Printf( 1535 "Setting object pointer name: %s on method " 1536 "object %p.\n", 1537 object_pointer_name.c_str(), 1538 static_cast<void *>(cxx_method_decl)); 1539 } 1540 m_ast.SetMetadata(cxx_method_decl, metadata); 1541 } else { 1542 ignore_containing_context = true; 1543 } 1544 } 1545 } 1546 } else { 1547 // We were asked to parse the type for a method in a 1548 // class, yet the class hasn't been asked to complete 1549 // itself through the clang::ExternalASTSource protocol, 1550 // so we need to just have the class complete itself and 1551 // do things the right way, then our 1552 // DIE should then have an entry in the 1553 // dwarf->GetDIEToType() map. First 1554 // we need to modify the dwarf->GetDIEToType() so it 1555 // doesn't think we are trying to parse this DIE 1556 // anymore... 1557 dwarf->GetDIEToType()[die.GetDIE()] = NULL; 1558 1559 // Now we get the full type to force our class type to 1560 // complete itself using the clang::ExternalASTSource 1561 // protocol which will parse all base classes and all 1562 // methods (including the method for this DIE). 1563 class_type->GetFullCompilerType(); 1564 1565 // The type for this DIE should have been filled in the 1566 // function call above 1567 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1568 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1569 type_sp = type_ptr->shared_from_this(); 1570 break; 1571 } 1572 1573 // FIXME This is fixing some even uglier behavior but we 1574 // really need to 1575 // uniq the methods of each class as well as the class 1576 // itself. <rdar://problem/11240464> 1577 type_handled = true; 1578 } 1579 } 1580 } 1581 } 1582 } 1583 } 1584 1585 if (!type_handled) { 1586 clang::FunctionDecl *function_decl = nullptr; 1587 clang::FunctionDecl *template_function_decl = nullptr; 1588 1589 if (abstract_origin_die_form.IsValid()) { 1590 DWARFDIE abs_die = 1591 dwarf->DebugInfo()->GetDIE(DIERef(abstract_origin_die_form)); 1592 1593 SymbolContext sc; 1594 1595 if (dwarf->ResolveType(abs_die)) { 1596 function_decl = llvm::dyn_cast_or_null<clang::FunctionDecl>( 1597 GetCachedClangDeclContextForDIE(abs_die)); 1598 1599 if (function_decl) { 1600 LinkDeclContextToDIE(function_decl, die); 1601 } 1602 } 1603 } 1604 1605 if (!function_decl) { 1606 // We just have a function that isn't part of a class 1607 function_decl = m_ast.CreateFunctionDeclaration( 1608 ignore_containing_context ? m_ast.GetTranslationUnitDecl() 1609 : containing_decl_ctx, 1610 type_name_cstr, clang_type, storage, is_inline); 1611 1612 if (has_template_params) { 1613 ClangASTContext::TemplateParameterInfos template_param_infos; 1614 ParseTemplateParameterInfos(die, template_param_infos); 1615 template_function_decl = m_ast.CreateFunctionDeclaration( 1616 ignore_containing_context ? m_ast.GetTranslationUnitDecl() 1617 : containing_decl_ctx, 1618 type_name_cstr, clang_type, storage, is_inline); 1619 clang::FunctionTemplateDecl *func_template_decl = 1620 m_ast.CreateFunctionTemplateDecl( 1621 containing_decl_ctx, template_function_decl, 1622 type_name_cstr, template_param_infos); 1623 m_ast.CreateFunctionTemplateSpecializationInfo( 1624 function_decl, func_template_decl, template_param_infos); 1625 } 1626 1627 lldbassert(function_decl); 1628 1629 if (function_decl) { 1630 LinkDeclContextToDIE(function_decl, die); 1631 1632 if (!function_param_decls.empty()) { 1633 m_ast.SetFunctionParameters(function_decl, 1634 &function_param_decls.front(), 1635 function_param_decls.size()); 1636 if (template_function_decl) 1637 m_ast.SetFunctionParameters(template_function_decl, 1638 &function_param_decls.front(), 1639 function_param_decls.size()); 1640 } 1641 1642 ClangASTMetadata metadata; 1643 metadata.SetUserID(die.GetID()); 1644 1645 if (!object_pointer_name.empty()) { 1646 metadata.SetObjectPtrName(object_pointer_name.c_str()); 1647 if (log) 1648 log->Printf("Setting object pointer name: %s on function " 1649 "object %p.", 1650 object_pointer_name.c_str(), 1651 static_cast<void *>(function_decl)); 1652 } 1653 m_ast.SetMetadata(function_decl, metadata); 1654 } 1655 } 1656 } 1657 } 1658 type_sp = std::make_shared<Type>( 1659 die.GetID(), dwarf, type_name_const_str, llvm::None, nullptr, 1660 LLDB_INVALID_UID, Type::eEncodingIsUID, &decl, clang_type, 1661 Type::eResolveStateFull); 1662 assert(type_sp.get()); 1663 } break; 1664 1665 case DW_TAG_array_type: { 1666 // Set a bit that lets us know that we are currently parsing this 1667 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1668 1669 DWARFFormValue type_die_form; 1670 uint32_t byte_stride = 0; 1671 uint32_t bit_stride = 0; 1672 bool is_vector = false; 1673 const size_t num_attributes = die.GetAttributes(attributes); 1674 1675 if (num_attributes > 0) { 1676 uint32_t i; 1677 for (i = 0; i < num_attributes; ++i) { 1678 attr = attributes.AttributeAtIndex(i); 1679 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1680 switch (attr) { 1681 case DW_AT_decl_file: 1682 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 1683 form_value.Unsigned())); 1684 break; 1685 case DW_AT_decl_line: 1686 decl.SetLine(form_value.Unsigned()); 1687 break; 1688 case DW_AT_decl_column: 1689 decl.SetColumn(form_value.Unsigned()); 1690 break; 1691 case DW_AT_name: 1692 type_name_cstr = form_value.AsCString(); 1693 type_name_const_str.SetCString(type_name_cstr); 1694 break; 1695 1696 case DW_AT_type: 1697 type_die_form = form_value; 1698 break; 1699 case DW_AT_byte_size: 1700 break; // byte_size = form_value.Unsigned(); break; 1701 case DW_AT_byte_stride: 1702 byte_stride = form_value.Unsigned(); 1703 break; 1704 case DW_AT_bit_stride: 1705 bit_stride = form_value.Unsigned(); 1706 break; 1707 case DW_AT_GNU_vector: 1708 is_vector = form_value.Boolean(); 1709 break; 1710 case DW_AT_accessibility: 1711 break; // accessibility = 1712 // DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 1713 case DW_AT_declaration: 1714 break; // is_forward_declaration = form_value.Boolean(); break; 1715 case DW_AT_allocated: 1716 case DW_AT_associated: 1717 case DW_AT_data_location: 1718 case DW_AT_description: 1719 case DW_AT_ordering: 1720 case DW_AT_start_scope: 1721 case DW_AT_visibility: 1722 case DW_AT_specification: 1723 case DW_AT_abstract_origin: 1724 case DW_AT_sibling: 1725 break; 1726 } 1727 } 1728 } 1729 1730 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1731 DW_TAG_value_to_name(tag), type_name_cstr); 1732 1733 DIERef type_die_ref(type_die_form); 1734 Type *element_type = dwarf->ResolveTypeUID(type_die_ref); 1735 1736 if (element_type) { 1737 auto array_info = ParseChildArrayInfo(die); 1738 if (array_info) { 1739 byte_stride = array_info->byte_stride; 1740 bit_stride = array_info->bit_stride; 1741 } 1742 if (byte_stride == 0 && bit_stride == 0) 1743 byte_stride = element_type->GetByteSize().getValueOr(0); 1744 CompilerType array_element_type = 1745 element_type->GetForwardCompilerType(); 1746 1747 if (ClangASTContext::IsCXXClassType(array_element_type) && 1748 !array_element_type.GetCompleteType()) { 1749 ModuleSP module_sp = die.GetModule(); 1750 if (module_sp) { 1751 if (die.GetCU()->GetProducer() == eProducerClang) 1752 module_sp->ReportError( 1753 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a " 1754 "class/union/struct element type DIE 0x%8.8x that is a " 1755 "forward declaration, not a complete definition.\nTry " 1756 "compiling the source file with -fstandalone-debug or " 1757 "disable -gmodules", 1758 die.GetOffset(), type_die_ref.die_offset); 1759 else 1760 module_sp->ReportError( 1761 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a " 1762 "class/union/struct element type DIE 0x%8.8x that is a " 1763 "forward declaration, not a complete definition.\nPlease " 1764 "file a bug against the compiler and include the " 1765 "preprocessed output for %s", 1766 die.GetOffset(), type_die_ref.die_offset, 1767 die.GetLLDBCompileUnit() 1768 ? die.GetLLDBCompileUnit()->GetPath().c_str() 1769 : "the source file"); 1770 } 1771 1772 // We have no choice other than to pretend that the element class 1773 // type is complete. If we don't do this, clang will crash when 1774 // trying to layout the class. Since we provide layout 1775 // assistance, all ivars in this class and other classes will be 1776 // fine, this is the best we can do short of crashing. 1777 if (ClangASTContext::StartTagDeclarationDefinition( 1778 array_element_type)) { 1779 ClangASTContext::CompleteTagDeclarationDefinition( 1780 array_element_type); 1781 } else { 1782 module_sp->ReportError("DWARF DIE at 0x%8.8x was not able to " 1783 "start its definition.\nPlease file a " 1784 "bug and attach the file at the start " 1785 "of this error message", 1786 type_die_ref.die_offset); 1787 } 1788 } 1789 1790 uint64_t array_element_bit_stride = byte_stride * 8 + bit_stride; 1791 if (array_info && array_info->element_orders.size() > 0) { 1792 uint64_t num_elements = 0; 1793 auto end = array_info->element_orders.rend(); 1794 for (auto pos = array_info->element_orders.rbegin(); pos != end; 1795 ++pos) { 1796 num_elements = *pos; 1797 clang_type = m_ast.CreateArrayType(array_element_type, 1798 num_elements, is_vector); 1799 array_element_type = clang_type; 1800 array_element_bit_stride = 1801 num_elements ? array_element_bit_stride * num_elements 1802 : array_element_bit_stride; 1803 } 1804 } else { 1805 clang_type = 1806 m_ast.CreateArrayType(array_element_type, 0, is_vector); 1807 } 1808 ConstString empty_name; 1809 type_sp = std::make_shared<Type>( 1810 die.GetID(), dwarf, empty_name, array_element_bit_stride / 8, 1811 nullptr, dwarf->GetUID(DIERef(type_die_form)), 1812 Type::eEncodingIsUID, &decl, clang_type, 1813 Type::eResolveStateFull); 1814 type_sp->SetEncodingType(element_type); 1815 m_ast.SetMetadataAsUserID(clang_type.GetOpaqueQualType(), 1816 die.GetID()); 1817 } 1818 } 1819 } break; 1820 1821 case DW_TAG_ptr_to_member_type: { 1822 DWARFFormValue type_die_form; 1823 DWARFFormValue containing_type_die_form; 1824 1825 const size_t num_attributes = die.GetAttributes(attributes); 1826 1827 if (num_attributes > 0) { 1828 uint32_t i; 1829 for (i = 0; i < num_attributes; ++i) { 1830 attr = attributes.AttributeAtIndex(i); 1831 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1832 switch (attr) { 1833 case DW_AT_type: 1834 type_die_form = form_value; 1835 break; 1836 case DW_AT_containing_type: 1837 containing_type_die_form = form_value; 1838 break; 1839 } 1840 } 1841 } 1842 1843 Type *pointee_type = dwarf->ResolveTypeUID(DIERef(type_die_form)); 1844 Type *class_type = 1845 dwarf->ResolveTypeUID(DIERef(containing_type_die_form)); 1846 1847 CompilerType pointee_clang_type = 1848 pointee_type->GetForwardCompilerType(); 1849 CompilerType class_clang_type = class_type->GetLayoutCompilerType(); 1850 1851 clang_type = ClangASTContext::CreateMemberPointerType( 1852 class_clang_type, pointee_clang_type); 1853 1854 if (llvm::Optional<uint64_t> clang_type_size = 1855 clang_type.GetByteSize(nullptr)) { 1856 byte_size = *clang_type_size; 1857 type_sp = std::make_shared<Type>( 1858 die.GetID(), dwarf, type_name_const_str, byte_size, nullptr, 1859 LLDB_INVALID_UID, Type::eEncodingIsUID, nullptr, clang_type, 1860 Type::eResolveStateForward); 1861 } 1862 } 1863 1864 break; 1865 } 1866 default: 1867 dwarf->GetObjectFile()->GetModule()->ReportError( 1868 "{0x%8.8x}: unhandled type tag 0x%4.4x (%s), please file a bug and " 1869 "attach the file at the start of this error message", 1870 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 1871 break; 1872 } 1873 1874 if (type_sp.get()) { 1875 DWARFDIE sc_parent_die = 1876 SymbolFileDWARF::GetParentSymbolContextDIE(die); 1877 dw_tag_t sc_parent_tag = sc_parent_die.Tag(); 1878 1879 SymbolContextScope *symbol_context_scope = NULL; 1880 if (sc_parent_tag == DW_TAG_compile_unit || 1881 sc_parent_tag == DW_TAG_partial_unit) { 1882 symbol_context_scope = sc.comp_unit; 1883 } else if (sc.function != NULL && sc_parent_die) { 1884 symbol_context_scope = 1885 sc.function->GetBlock(true).FindBlockByID(sc_parent_die.GetID()); 1886 if (symbol_context_scope == NULL) 1887 symbol_context_scope = sc.function; 1888 } 1889 1890 if (symbol_context_scope != NULL) { 1891 type_sp->SetSymbolContextScope(symbol_context_scope); 1892 } 1893 1894 // We are ready to put this type into the uniqued list up at the module 1895 // level 1896 type_list->Insert(type_sp); 1897 1898 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1899 } 1900 } else if (type_ptr != DIE_IS_BEING_PARSED) { 1901 type_sp = type_ptr->shared_from_this(); 1902 } 1903 } 1904 return type_sp; 1905 } 1906 1907 // DWARF parsing functions 1908 1909 class DWARFASTParserClang::DelayedAddObjCClassProperty { 1910 public: 1911 DelayedAddObjCClassProperty( 1912 const CompilerType &class_opaque_type, const char *property_name, 1913 const CompilerType &property_opaque_type, // The property type is only 1914 // required if you don't have an 1915 // ivar decl 1916 clang::ObjCIvarDecl *ivar_decl, const char *property_setter_name, 1917 const char *property_getter_name, uint32_t property_attributes, 1918 const ClangASTMetadata *metadata) 1919 : m_class_opaque_type(class_opaque_type), m_property_name(property_name), 1920 m_property_opaque_type(property_opaque_type), m_ivar_decl(ivar_decl), 1921 m_property_setter_name(property_setter_name), 1922 m_property_getter_name(property_getter_name), 1923 m_property_attributes(property_attributes) { 1924 if (metadata != NULL) { 1925 m_metadata_up.reset(new ClangASTMetadata()); 1926 *m_metadata_up = *metadata; 1927 } 1928 } 1929 1930 DelayedAddObjCClassProperty(const DelayedAddObjCClassProperty &rhs) { 1931 *this = rhs; 1932 } 1933 1934 DelayedAddObjCClassProperty & 1935 operator=(const DelayedAddObjCClassProperty &rhs) { 1936 m_class_opaque_type = rhs.m_class_opaque_type; 1937 m_property_name = rhs.m_property_name; 1938 m_property_opaque_type = rhs.m_property_opaque_type; 1939 m_ivar_decl = rhs.m_ivar_decl; 1940 m_property_setter_name = rhs.m_property_setter_name; 1941 m_property_getter_name = rhs.m_property_getter_name; 1942 m_property_attributes = rhs.m_property_attributes; 1943 1944 if (rhs.m_metadata_up) { 1945 m_metadata_up.reset(new ClangASTMetadata()); 1946 *m_metadata_up = *rhs.m_metadata_up; 1947 } 1948 return *this; 1949 } 1950 1951 bool Finalize() { 1952 return ClangASTContext::AddObjCClassProperty( 1953 m_class_opaque_type, m_property_name, m_property_opaque_type, 1954 m_ivar_decl, m_property_setter_name, m_property_getter_name, 1955 m_property_attributes, m_metadata_up.get()); 1956 } 1957 1958 private: 1959 CompilerType m_class_opaque_type; 1960 const char *m_property_name; 1961 CompilerType m_property_opaque_type; 1962 clang::ObjCIvarDecl *m_ivar_decl; 1963 const char *m_property_setter_name; 1964 const char *m_property_getter_name; 1965 uint32_t m_property_attributes; 1966 std::unique_ptr<ClangASTMetadata> m_metadata_up; 1967 }; 1968 1969 bool DWARFASTParserClang::ParseTemplateDIE( 1970 const DWARFDIE &die, 1971 ClangASTContext::TemplateParameterInfos &template_param_infos) { 1972 const dw_tag_t tag = die.Tag(); 1973 bool is_template_template_argument = false; 1974 1975 switch (tag) { 1976 case DW_TAG_GNU_template_parameter_pack: { 1977 template_param_infos.packed_args.reset( 1978 new ClangASTContext::TemplateParameterInfos); 1979 for (DWARFDIE child_die = die.GetFirstChild(); child_die.IsValid(); 1980 child_die = child_die.GetSibling()) { 1981 if (!ParseTemplateDIE(child_die, *template_param_infos.packed_args)) 1982 return false; 1983 } 1984 if (const char *name = die.GetName()) { 1985 template_param_infos.pack_name = name; 1986 } 1987 return true; 1988 } 1989 case DW_TAG_GNU_template_template_param: 1990 is_template_template_argument = true; 1991 LLVM_FALLTHROUGH; 1992 case DW_TAG_template_type_parameter: 1993 case DW_TAG_template_value_parameter: { 1994 DWARFAttributes attributes; 1995 const size_t num_attributes = die.GetAttributes(attributes); 1996 const char *name = nullptr; 1997 const char *template_name = nullptr; 1998 CompilerType clang_type; 1999 uint64_t uval64 = 0; 2000 bool uval64_valid = false; 2001 if (num_attributes > 0) { 2002 DWARFFormValue form_value; 2003 for (size_t i = 0; i < num_attributes; ++i) { 2004 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2005 2006 switch (attr) { 2007 case DW_AT_name: 2008 if (attributes.ExtractFormValueAtIndex(i, form_value)) 2009 name = form_value.AsCString(); 2010 break; 2011 2012 case DW_AT_GNU_template_name: 2013 if (attributes.ExtractFormValueAtIndex(i, form_value)) 2014 template_name = form_value.AsCString(); 2015 break; 2016 2017 case DW_AT_type: 2018 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2019 Type *lldb_type = die.ResolveTypeUID(DIERef(form_value)); 2020 if (lldb_type) 2021 clang_type = lldb_type->GetForwardCompilerType(); 2022 } 2023 break; 2024 2025 case DW_AT_const_value: 2026 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2027 uval64_valid = true; 2028 uval64 = form_value.Unsigned(); 2029 } 2030 break; 2031 default: 2032 break; 2033 } 2034 } 2035 2036 clang::ASTContext *ast = m_ast.getASTContext(); 2037 if (!clang_type) 2038 clang_type = m_ast.GetBasicType(eBasicTypeVoid); 2039 2040 if (!is_template_template_argument) { 2041 bool is_signed = false; 2042 if (name && name[0]) 2043 template_param_infos.names.push_back(name); 2044 else 2045 template_param_infos.names.push_back(NULL); 2046 2047 // Get the signed value for any integer or enumeration if available 2048 clang_type.IsIntegerOrEnumerationType(is_signed); 2049 2050 if (tag == DW_TAG_template_value_parameter && uval64_valid) { 2051 llvm::Optional<uint64_t> size = clang_type.GetBitSize(nullptr); 2052 if (!size) 2053 return false; 2054 llvm::APInt apint(*size, uval64, is_signed); 2055 template_param_infos.args.push_back( 2056 clang::TemplateArgument(*ast, llvm::APSInt(apint, !is_signed), 2057 ClangUtil::GetQualType(clang_type))); 2058 } else { 2059 template_param_infos.args.push_back( 2060 clang::TemplateArgument(ClangUtil::GetQualType(clang_type))); 2061 } 2062 } else { 2063 auto *tplt_type = m_ast.CreateTemplateTemplateParmDecl(template_name); 2064 template_param_infos.names.push_back(name); 2065 template_param_infos.args.push_back( 2066 clang::TemplateArgument(clang::TemplateName(tplt_type))); 2067 } 2068 } 2069 } 2070 return true; 2071 2072 default: 2073 break; 2074 } 2075 return false; 2076 } 2077 2078 bool DWARFASTParserClang::ParseTemplateParameterInfos( 2079 const DWARFDIE &parent_die, 2080 ClangASTContext::TemplateParameterInfos &template_param_infos) { 2081 2082 if (!parent_die) 2083 return false; 2084 2085 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2086 die = die.GetSibling()) { 2087 const dw_tag_t tag = die.Tag(); 2088 2089 switch (tag) { 2090 case DW_TAG_template_type_parameter: 2091 case DW_TAG_template_value_parameter: 2092 case DW_TAG_GNU_template_parameter_pack: 2093 case DW_TAG_GNU_template_template_param: 2094 ParseTemplateDIE(die, template_param_infos); 2095 break; 2096 2097 default: 2098 break; 2099 } 2100 } 2101 if (template_param_infos.args.empty()) 2102 return false; 2103 return template_param_infos.args.size() == template_param_infos.names.size(); 2104 } 2105 2106 bool DWARFASTParserClang::CompleteTypeFromDWARF(const DWARFDIE &die, 2107 lldb_private::Type *type, 2108 CompilerType &clang_type) { 2109 SymbolFileDWARF *dwarf = die.GetDWARF(); 2110 2111 std::lock_guard<std::recursive_mutex> guard( 2112 dwarf->GetObjectFile()->GetModule()->GetMutex()); 2113 2114 // Disable external storage for this type so we don't get anymore 2115 // clang::ExternalASTSource queries for this type. 2116 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), false); 2117 2118 if (!die) 2119 return false; 2120 2121 #if defined LLDB_CONFIGURATION_DEBUG 2122 // For debugging purposes, the LLDB_DWARF_DONT_COMPLETE_TYPENAMES environment 2123 // variable can be set with one or more typenames separated by ';' 2124 // characters. This will cause this function to not complete any types whose 2125 // names match. 2126 // 2127 // Examples of setting this environment variable: 2128 // 2129 // LLDB_DWARF_DONT_COMPLETE_TYPENAMES=Foo 2130 // LLDB_DWARF_DONT_COMPLETE_TYPENAMES=Foo;Bar;Baz 2131 const char *dont_complete_typenames_cstr = 2132 getenv("LLDB_DWARF_DONT_COMPLETE_TYPENAMES"); 2133 if (dont_complete_typenames_cstr && dont_complete_typenames_cstr[0]) { 2134 const char *die_name = die.GetName(); 2135 if (die_name && die_name[0]) { 2136 const char *match = strstr(dont_complete_typenames_cstr, die_name); 2137 if (match) { 2138 size_t die_name_length = strlen(die_name); 2139 while (match) { 2140 const char separator_char = ';'; 2141 const char next_char = match[die_name_length]; 2142 if (next_char == '\0' || next_char == separator_char) { 2143 if (match == dont_complete_typenames_cstr || 2144 match[-1] == separator_char) 2145 return false; 2146 } 2147 match = strstr(match + 1, die_name); 2148 } 2149 } 2150 } 2151 } 2152 #endif 2153 2154 const dw_tag_t tag = die.Tag(); 2155 2156 Log *log = 2157 nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION)); 2158 if (log) 2159 dwarf->GetObjectFile()->GetModule()->LogMessageVerboseBacktrace( 2160 log, "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...", 2161 die.GetID(), die.GetTagAsCString(), type->GetName().AsCString()); 2162 assert(clang_type); 2163 DWARFAttributes attributes; 2164 switch (tag) { 2165 case DW_TAG_structure_type: 2166 case DW_TAG_union_type: 2167 case DW_TAG_class_type: { 2168 ClangASTImporter::LayoutInfo layout_info; 2169 2170 { 2171 if (die.HasChildren()) { 2172 LanguageType class_language = eLanguageTypeUnknown; 2173 if (ClangASTContext::IsObjCObjectOrInterfaceType(clang_type)) { 2174 class_language = eLanguageTypeObjC; 2175 // For objective C we don't start the definition when the class is 2176 // created. 2177 ClangASTContext::StartTagDeclarationDefinition(clang_type); 2178 } 2179 2180 int tag_decl_kind = -1; 2181 AccessType default_accessibility = eAccessNone; 2182 if (tag == DW_TAG_structure_type) { 2183 tag_decl_kind = clang::TTK_Struct; 2184 default_accessibility = eAccessPublic; 2185 } else if (tag == DW_TAG_union_type) { 2186 tag_decl_kind = clang::TTK_Union; 2187 default_accessibility = eAccessPublic; 2188 } else if (tag == DW_TAG_class_type) { 2189 tag_decl_kind = clang::TTK_Class; 2190 default_accessibility = eAccessPrivate; 2191 } 2192 2193 SymbolContext sc(die.GetLLDBCompileUnit()); 2194 std::vector<std::unique_ptr<clang::CXXBaseSpecifier>> bases; 2195 std::vector<int> member_accessibilities; 2196 bool is_a_class = false; 2197 // Parse members and base classes first 2198 std::vector<DWARFDIE> member_function_dies; 2199 2200 DelayedPropertyList delayed_properties; 2201 ParseChildMembers(sc, die, clang_type, class_language, bases, 2202 member_accessibilities, member_function_dies, 2203 delayed_properties, default_accessibility, is_a_class, 2204 layout_info); 2205 2206 // Now parse any methods if there were any... 2207 for (const DWARFDIE &die : member_function_dies) 2208 dwarf->ResolveType(die); 2209 2210 if (class_language == eLanguageTypeObjC) { 2211 ConstString class_name(clang_type.GetTypeName()); 2212 if (class_name) { 2213 DIEArray method_die_offsets; 2214 dwarf->GetObjCMethodDIEOffsets(class_name, method_die_offsets); 2215 2216 if (!method_die_offsets.empty()) { 2217 DWARFDebugInfo *debug_info = dwarf->DebugInfo(); 2218 2219 const size_t num_matches = method_die_offsets.size(); 2220 for (size_t i = 0; i < num_matches; ++i) { 2221 const DIERef &die_ref = method_die_offsets[i]; 2222 DWARFDIE method_die = debug_info->GetDIE(die_ref); 2223 2224 if (method_die) 2225 method_die.ResolveType(); 2226 } 2227 } 2228 2229 for (DelayedPropertyList::iterator pi = delayed_properties.begin(), 2230 pe = delayed_properties.end(); 2231 pi != pe; ++pi) 2232 pi->Finalize(); 2233 } 2234 } 2235 2236 // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we 2237 // need to tell the clang type it is actually a class. 2238 if (class_language != eLanguageTypeObjC) { 2239 if (is_a_class && tag_decl_kind != clang::TTK_Class) 2240 m_ast.SetTagTypeKind(ClangUtil::GetQualType(clang_type), 2241 clang::TTK_Class); 2242 } 2243 2244 // Since DW_TAG_structure_type gets used for both classes and 2245 // structures, we may need to set any DW_TAG_member fields to have a 2246 // "private" access if none was specified. When we parsed the child 2247 // members we tracked that actual accessibility value for each 2248 // DW_TAG_member in the "member_accessibilities" array. If the value 2249 // for the member is zero, then it was set to the 2250 // "default_accessibility" which for structs was "public". Below we 2251 // correct this by setting any fields to "private" that weren't 2252 // correctly set. 2253 if (is_a_class && !member_accessibilities.empty()) { 2254 // This is a class and all members that didn't have their access 2255 // specified are private. 2256 m_ast.SetDefaultAccessForRecordFields( 2257 m_ast.GetAsRecordDecl(clang_type), eAccessPrivate, 2258 &member_accessibilities.front(), member_accessibilities.size()); 2259 } 2260 2261 if (!bases.empty()) { 2262 // Make sure all base classes refer to complete types and not forward 2263 // declarations. If we don't do this, clang will crash with an 2264 // assertion in the call to clang_type.TransferBaseClasses() 2265 for (const auto &base_class : bases) { 2266 clang::TypeSourceInfo *type_source_info = 2267 base_class->getTypeSourceInfo(); 2268 if (type_source_info) { 2269 CompilerType base_class_type( 2270 &m_ast, type_source_info->getType().getAsOpaquePtr()); 2271 if (!base_class_type.GetCompleteType()) { 2272 auto module = dwarf->GetObjectFile()->GetModule(); 2273 module->ReportError(":: Class '%s' has a base class '%s' which " 2274 "does not have a complete definition.", 2275 die.GetName(), 2276 base_class_type.GetTypeName().GetCString()); 2277 if (die.GetCU()->GetProducer() == eProducerClang) 2278 module->ReportError(":: Try compiling the source file with " 2279 "-fstandalone-debug."); 2280 2281 // We have no choice other than to pretend that the base class 2282 // is complete. If we don't do this, clang will crash when we 2283 // call setBases() inside of 2284 // "clang_type.TransferBaseClasses()" below. Since we 2285 // provide layout assistance, all ivars in this class and other 2286 // classes will be fine, this is the best we can do short of 2287 // crashing. 2288 if (ClangASTContext::StartTagDeclarationDefinition( 2289 base_class_type)) { 2290 ClangASTContext::CompleteTagDeclarationDefinition( 2291 base_class_type); 2292 } 2293 } 2294 } 2295 } 2296 2297 m_ast.TransferBaseClasses(clang_type.GetOpaqueQualType(), 2298 std::move(bases)); 2299 } 2300 } 2301 } 2302 2303 m_ast.AddMethodOverridesForCXXRecordType(clang_type.GetOpaqueQualType()); 2304 ClangASTContext::BuildIndirectFields(clang_type); 2305 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 2306 2307 if (!layout_info.field_offsets.empty() || 2308 !layout_info.base_offsets.empty() || 2309 !layout_info.vbase_offsets.empty()) { 2310 if (type) 2311 layout_info.bit_size = type->GetByteSize().getValueOr(0) * 8; 2312 if (layout_info.bit_size == 0) 2313 layout_info.bit_size = 2314 die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 0) * 8; 2315 2316 clang::CXXRecordDecl *record_decl = 2317 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 2318 if (record_decl) { 2319 if (log) { 2320 ModuleSP module_sp = dwarf->GetObjectFile()->GetModule(); 2321 2322 if (module_sp) { 2323 module_sp->LogMessage( 2324 log, 2325 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) " 2326 "caching layout info for record_decl = %p, bit_size = %" PRIu64 2327 ", alignment = %" PRIu64 2328 ", field_offsets[%u], base_offsets[%u], vbase_offsets[%u])", 2329 static_cast<void *>(clang_type.GetOpaqueQualType()), 2330 static_cast<void *>(record_decl), layout_info.bit_size, 2331 layout_info.alignment, 2332 static_cast<uint32_t>(layout_info.field_offsets.size()), 2333 static_cast<uint32_t>(layout_info.base_offsets.size()), 2334 static_cast<uint32_t>(layout_info.vbase_offsets.size())); 2335 2336 uint32_t idx; 2337 { 2338 llvm::DenseMap<const clang::FieldDecl *, uint64_t>::const_iterator 2339 pos, 2340 end = layout_info.field_offsets.end(); 2341 for (idx = 0, pos = layout_info.field_offsets.begin(); pos != end; 2342 ++pos, ++idx) { 2343 module_sp->LogMessage( 2344 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2345 "%p) field[%u] = { bit_offset=%u, name='%s' }", 2346 static_cast<void *>(clang_type.GetOpaqueQualType()), idx, 2347 static_cast<uint32_t>(pos->second), 2348 pos->first->getNameAsString().c_str()); 2349 } 2350 } 2351 2352 { 2353 llvm::DenseMap<const clang::CXXRecordDecl *, 2354 clang::CharUnits>::const_iterator base_pos, 2355 base_end = layout_info.base_offsets.end(); 2356 for (idx = 0, base_pos = layout_info.base_offsets.begin(); 2357 base_pos != base_end; ++base_pos, ++idx) { 2358 module_sp->LogMessage( 2359 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2360 "%p) base[%u] = { byte_offset=%u, name='%s' }", 2361 clang_type.GetOpaqueQualType(), idx, 2362 (uint32_t)base_pos->second.getQuantity(), 2363 base_pos->first->getNameAsString().c_str()); 2364 } 2365 } 2366 { 2367 llvm::DenseMap<const clang::CXXRecordDecl *, 2368 clang::CharUnits>::const_iterator vbase_pos, 2369 vbase_end = layout_info.vbase_offsets.end(); 2370 for (idx = 0, vbase_pos = layout_info.vbase_offsets.begin(); 2371 vbase_pos != vbase_end; ++vbase_pos, ++idx) { 2372 module_sp->LogMessage( 2373 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2374 "%p) vbase[%u] = { byte_offset=%u, name='%s' }", 2375 static_cast<void *>(clang_type.GetOpaqueQualType()), idx, 2376 static_cast<uint32_t>(vbase_pos->second.getQuantity()), 2377 vbase_pos->first->getNameAsString().c_str()); 2378 } 2379 } 2380 } 2381 } 2382 GetClangASTImporter().InsertRecordDecl(record_decl, layout_info); 2383 } 2384 } 2385 } 2386 2387 return (bool)clang_type; 2388 2389 case DW_TAG_enumeration_type: 2390 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 2391 if (die.HasChildren()) { 2392 SymbolContext sc(die.GetLLDBCompileUnit()); 2393 bool is_signed = false; 2394 clang_type.IsIntegerType(is_signed); 2395 ParseChildEnumerators(sc, clang_type, is_signed, 2396 type->GetByteSize().getValueOr(0), die); 2397 } 2398 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 2399 } 2400 return (bool)clang_type; 2401 2402 default: 2403 assert(false && "not a forward clang type decl!"); 2404 break; 2405 } 2406 2407 return false; 2408 } 2409 2410 std::vector<DWARFDIE> DWARFASTParserClang::GetDIEForDeclContext( 2411 lldb_private::CompilerDeclContext decl_context) { 2412 std::vector<DWARFDIE> result; 2413 for (auto it = m_decl_ctx_to_die.find( 2414 (clang::DeclContext *)decl_context.GetOpaqueDeclContext()); 2415 it != m_decl_ctx_to_die.end(); it++) 2416 result.push_back(it->second); 2417 return result; 2418 } 2419 2420 CompilerDecl DWARFASTParserClang::GetDeclForUIDFromDWARF(const DWARFDIE &die) { 2421 clang::Decl *clang_decl = GetClangDeclForDIE(die); 2422 if (clang_decl != nullptr) 2423 return CompilerDecl(&m_ast, clang_decl); 2424 return CompilerDecl(); 2425 } 2426 2427 CompilerDeclContext 2428 DWARFASTParserClang::GetDeclContextForUIDFromDWARF(const DWARFDIE &die) { 2429 clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE(die); 2430 if (clang_decl_ctx) 2431 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2432 return CompilerDeclContext(); 2433 } 2434 2435 CompilerDeclContext 2436 DWARFASTParserClang::GetDeclContextContainingUIDFromDWARF(const DWARFDIE &die) { 2437 clang::DeclContext *clang_decl_ctx = 2438 GetClangDeclContextContainingDIE(die, nullptr); 2439 if (clang_decl_ctx) 2440 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2441 return CompilerDeclContext(); 2442 } 2443 2444 size_t DWARFASTParserClang::ParseChildEnumerators( 2445 const SymbolContext &sc, lldb_private::CompilerType &clang_type, 2446 bool is_signed, uint32_t enumerator_byte_size, const DWARFDIE &parent_die) { 2447 if (!parent_die) 2448 return 0; 2449 2450 size_t enumerators_added = 0; 2451 2452 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2453 die = die.GetSibling()) { 2454 const dw_tag_t tag = die.Tag(); 2455 if (tag == DW_TAG_enumerator) { 2456 DWARFAttributes attributes; 2457 const size_t num_child_attributes = die.GetAttributes(attributes); 2458 if (num_child_attributes > 0) { 2459 const char *name = NULL; 2460 bool got_value = false; 2461 int64_t enum_value = 0; 2462 Declaration decl; 2463 2464 uint32_t i; 2465 for (i = 0; i < num_child_attributes; ++i) { 2466 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2467 DWARFFormValue form_value; 2468 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2469 switch (attr) { 2470 case DW_AT_const_value: 2471 got_value = true; 2472 if (is_signed) 2473 enum_value = form_value.Signed(); 2474 else 2475 enum_value = form_value.Unsigned(); 2476 break; 2477 2478 case DW_AT_name: 2479 name = form_value.AsCString(); 2480 break; 2481 2482 case DW_AT_description: 2483 default: 2484 case DW_AT_decl_file: 2485 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 2486 form_value.Unsigned())); 2487 break; 2488 case DW_AT_decl_line: 2489 decl.SetLine(form_value.Unsigned()); 2490 break; 2491 case DW_AT_decl_column: 2492 decl.SetColumn(form_value.Unsigned()); 2493 break; 2494 case DW_AT_sibling: 2495 break; 2496 } 2497 } 2498 } 2499 2500 if (name && name[0] && got_value) { 2501 m_ast.AddEnumerationValueToEnumerationType( 2502 clang_type, decl, name, enum_value, enumerator_byte_size * 8); 2503 ++enumerators_added; 2504 } 2505 } 2506 } 2507 } 2508 return enumerators_added; 2509 } 2510 2511 #if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE) 2512 2513 class DIEStack { 2514 public: 2515 void Push(const DWARFDIE &die) { m_dies.push_back(die); } 2516 2517 void LogDIEs(Log *log) { 2518 StreamString log_strm; 2519 const size_t n = m_dies.size(); 2520 log_strm.Printf("DIEStack[%" PRIu64 "]:\n", (uint64_t)n); 2521 for (size_t i = 0; i < n; i++) { 2522 std::string qualified_name; 2523 const DWARFDIE &die = m_dies[i]; 2524 die.GetQualifiedName(qualified_name); 2525 log_strm.Printf("[%" PRIu64 "] 0x%8.8x: %s name='%s'\n", (uint64_t)i, 2526 die.GetOffset(), die.GetTagAsCString(), 2527 qualified_name.c_str()); 2528 } 2529 log->PutCString(log_strm.GetData()); 2530 } 2531 void Pop() { m_dies.pop_back(); } 2532 2533 class ScopedPopper { 2534 public: 2535 ScopedPopper(DIEStack &die_stack) 2536 : m_die_stack(die_stack), m_valid(false) {} 2537 2538 void Push(const DWARFDIE &die) { 2539 m_valid = true; 2540 m_die_stack.Push(die); 2541 } 2542 2543 ~ScopedPopper() { 2544 if (m_valid) 2545 m_die_stack.Pop(); 2546 } 2547 2548 protected: 2549 DIEStack &m_die_stack; 2550 bool m_valid; 2551 }; 2552 2553 protected: 2554 typedef std::vector<DWARFDIE> Stack; 2555 Stack m_dies; 2556 }; 2557 #endif 2558 2559 Function *DWARFASTParserClang::ParseFunctionFromDWARF(CompileUnit &comp_unit, 2560 const DWARFDIE &die) { 2561 DWARFRangeList func_ranges; 2562 const char *name = NULL; 2563 const char *mangled = NULL; 2564 int decl_file = 0; 2565 int decl_line = 0; 2566 int decl_column = 0; 2567 int call_file = 0; 2568 int call_line = 0; 2569 int call_column = 0; 2570 DWARFExpression frame_base(die.GetCU()); 2571 2572 const dw_tag_t tag = die.Tag(); 2573 2574 if (tag != DW_TAG_subprogram) 2575 return NULL; 2576 2577 if (die.GetDIENamesAndRanges(name, mangled, func_ranges, decl_file, decl_line, 2578 decl_column, call_file, call_line, call_column, 2579 &frame_base)) { 2580 2581 // Union of all ranges in the function DIE (if the function is 2582 // discontiguous) 2583 AddressRange func_range; 2584 lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase(0); 2585 lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd(0); 2586 if (lowest_func_addr != LLDB_INVALID_ADDRESS && 2587 lowest_func_addr <= highest_func_addr) { 2588 ModuleSP module_sp(die.GetModule()); 2589 func_range.GetBaseAddress().ResolveAddressUsingFileSections( 2590 lowest_func_addr, module_sp->GetSectionList()); 2591 if (func_range.GetBaseAddress().IsValid()) 2592 func_range.SetByteSize(highest_func_addr - lowest_func_addr); 2593 } 2594 2595 if (func_range.GetBaseAddress().IsValid()) { 2596 Mangled func_name; 2597 if (mangled) 2598 func_name.SetValue(ConstString(mangled), true); 2599 else if ((die.GetParent().Tag() == DW_TAG_compile_unit || 2600 die.GetParent().Tag() == DW_TAG_partial_unit) && 2601 Language::LanguageIsCPlusPlus(die.GetLanguage()) && name && 2602 strcmp(name, "main") != 0) { 2603 // If the mangled name is not present in the DWARF, generate the 2604 // demangled name using the decl context. We skip if the function is 2605 // "main" as its name is never mangled. 2606 bool is_static = false; 2607 bool is_variadic = false; 2608 bool has_template_params = false; 2609 unsigned type_quals = 0; 2610 std::vector<CompilerType> param_types; 2611 std::vector<clang::ParmVarDecl *> param_decls; 2612 DWARFDeclContext decl_ctx; 2613 StreamString sstr; 2614 2615 die.GetDWARFDeclContext(decl_ctx); 2616 sstr << decl_ctx.GetQualifiedName(); 2617 2618 clang::DeclContext *containing_decl_ctx = 2619 GetClangDeclContextContainingDIE(die, nullptr); 2620 ParseChildParameters(comp_unit, containing_decl_ctx, die, true, 2621 is_static, is_variadic, has_template_params, 2622 param_types, param_decls, type_quals); 2623 sstr << "("; 2624 for (size_t i = 0; i < param_types.size(); i++) { 2625 if (i > 0) 2626 sstr << ", "; 2627 sstr << param_types[i].GetTypeName(); 2628 } 2629 if (is_variadic) 2630 sstr << ", ..."; 2631 sstr << ")"; 2632 if (type_quals & clang::Qualifiers::Const) 2633 sstr << " const"; 2634 2635 func_name.SetValue(ConstString(sstr.GetString()), false); 2636 } else 2637 func_name.SetValue(ConstString(name), false); 2638 2639 FunctionSP func_sp; 2640 std::unique_ptr<Declaration> decl_up; 2641 if (decl_file != 0 || decl_line != 0 || decl_column != 0) 2642 decl_up.reset(new Declaration( 2643 comp_unit.GetSupportFiles().GetFileSpecAtIndex(decl_file), 2644 decl_line, decl_column)); 2645 2646 SymbolFileDWARF *dwarf = die.GetDWARF(); 2647 // Supply the type _only_ if it has already been parsed 2648 Type *func_type = dwarf->GetDIEToType().lookup(die.GetDIE()); 2649 2650 assert(func_type == NULL || func_type != DIE_IS_BEING_PARSED); 2651 2652 if (dwarf->FixupAddress(func_range.GetBaseAddress())) { 2653 const user_id_t func_user_id = die.GetID(); 2654 func_sp = 2655 std::make_shared<Function>(&comp_unit, 2656 func_user_id, // UserID is the DIE offset 2657 func_user_id, func_name, func_type, 2658 func_range); // first address range 2659 2660 if (func_sp.get() != NULL) { 2661 if (frame_base.IsValid()) 2662 func_sp->GetFrameBaseExpression() = frame_base; 2663 comp_unit.AddFunction(func_sp); 2664 return func_sp.get(); 2665 } 2666 } 2667 } 2668 } 2669 return NULL; 2670 } 2671 2672 bool DWARFASTParserClang::ParseChildMembers( 2673 const SymbolContext &sc, const DWARFDIE &parent_die, 2674 CompilerType &class_clang_type, const LanguageType class_language, 2675 std::vector<std::unique_ptr<clang::CXXBaseSpecifier>> &base_classes, 2676 std::vector<int> &member_accessibilities, 2677 std::vector<DWARFDIE> &member_function_dies, 2678 DelayedPropertyList &delayed_properties, AccessType &default_accessibility, 2679 bool &is_a_class, ClangASTImporter::LayoutInfo &layout_info) { 2680 if (!parent_die) 2681 return 0; 2682 2683 // Get the parent byte size so we can verify any members will fit 2684 const uint64_t parent_byte_size = 2685 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, UINT64_MAX); 2686 const uint64_t parent_bit_size = 2687 parent_byte_size == UINT64_MAX ? UINT64_MAX : parent_byte_size * 8; 2688 2689 uint32_t member_idx = 0; 2690 BitfieldInfo last_field_info; 2691 2692 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule(); 2693 ClangASTContext *ast = 2694 llvm::dyn_cast_or_null<ClangASTContext>(class_clang_type.GetTypeSystem()); 2695 if (ast == nullptr) 2696 return 0; 2697 2698 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2699 die = die.GetSibling()) { 2700 dw_tag_t tag = die.Tag(); 2701 2702 switch (tag) { 2703 case DW_TAG_member: 2704 case DW_TAG_APPLE_property: { 2705 DWARFAttributes attributes; 2706 const size_t num_attributes = die.GetAttributes(attributes); 2707 if (num_attributes > 0) { 2708 Declaration decl; 2709 // DWARFExpression location; 2710 const char *name = NULL; 2711 const char *prop_name = NULL; 2712 const char *prop_getter_name = NULL; 2713 const char *prop_setter_name = NULL; 2714 uint32_t prop_attributes = 0; 2715 2716 bool is_artificial = false; 2717 DWARFFormValue encoding_form; 2718 AccessType accessibility = eAccessNone; 2719 uint32_t member_byte_offset = 2720 (parent_die.Tag() == DW_TAG_union_type) ? 0 : UINT32_MAX; 2721 llvm::Optional<uint64_t> byte_size; 2722 int64_t bit_offset = 0; 2723 uint64_t data_bit_offset = UINT64_MAX; 2724 size_t bit_size = 0; 2725 bool is_external = 2726 false; // On DW_TAG_members, this means the member is static 2727 uint32_t i; 2728 for (i = 0; i < num_attributes && !is_artificial; ++i) { 2729 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2730 DWARFFormValue form_value; 2731 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2732 switch (attr) { 2733 case DW_AT_decl_file: 2734 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 2735 form_value.Unsigned())); 2736 break; 2737 case DW_AT_decl_line: 2738 decl.SetLine(form_value.Unsigned()); 2739 break; 2740 case DW_AT_decl_column: 2741 decl.SetColumn(form_value.Unsigned()); 2742 break; 2743 case DW_AT_name: 2744 name = form_value.AsCString(); 2745 break; 2746 case DW_AT_type: 2747 encoding_form = form_value; 2748 break; 2749 case DW_AT_bit_offset: 2750 bit_offset = form_value.Signed(); 2751 break; 2752 case DW_AT_bit_size: 2753 bit_size = form_value.Unsigned(); 2754 break; 2755 case DW_AT_byte_size: 2756 byte_size = form_value.Unsigned(); 2757 break; 2758 case DW_AT_data_bit_offset: 2759 data_bit_offset = form_value.Unsigned(); 2760 break; 2761 case DW_AT_data_member_location: 2762 if (form_value.BlockData()) { 2763 Value initialValue(0); 2764 Value memberOffset(0); 2765 const DWARFDataExtractor &debug_info_data = die.GetData(); 2766 uint32_t block_length = form_value.Unsigned(); 2767 uint32_t block_offset = 2768 form_value.BlockData() - debug_info_data.GetDataStart(); 2769 if (DWARFExpression::Evaluate( 2770 nullptr, // ExecutionContext * 2771 nullptr, // RegisterContext * 2772 module_sp, debug_info_data, die.GetCU(), block_offset, 2773 block_length, eRegisterKindDWARF, &initialValue, 2774 nullptr, memberOffset, nullptr)) { 2775 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 2776 } 2777 } else { 2778 // With DWARF 3 and later, if the value is an integer constant, 2779 // this form value is the offset in bytes from the beginning of 2780 // the containing entity. 2781 member_byte_offset = form_value.Unsigned(); 2782 } 2783 break; 2784 2785 case DW_AT_accessibility: 2786 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 2787 break; 2788 case DW_AT_artificial: 2789 is_artificial = form_value.Boolean(); 2790 break; 2791 case DW_AT_APPLE_property_name: 2792 prop_name = form_value.AsCString(); 2793 break; 2794 case DW_AT_APPLE_property_getter: 2795 prop_getter_name = form_value.AsCString(); 2796 break; 2797 case DW_AT_APPLE_property_setter: 2798 prop_setter_name = form_value.AsCString(); 2799 break; 2800 case DW_AT_APPLE_property_attribute: 2801 prop_attributes = form_value.Unsigned(); 2802 break; 2803 case DW_AT_external: 2804 is_external = form_value.Boolean(); 2805 break; 2806 2807 default: 2808 case DW_AT_declaration: 2809 case DW_AT_description: 2810 case DW_AT_mutable: 2811 case DW_AT_visibility: 2812 case DW_AT_sibling: 2813 break; 2814 } 2815 } 2816 } 2817 2818 if (prop_name) { 2819 ConstString fixed_getter; 2820 ConstString fixed_setter; 2821 2822 // Check if the property getter/setter were provided as full names. 2823 // We want basenames, so we extract them. 2824 2825 if (prop_getter_name && prop_getter_name[0] == '-') { 2826 ObjCLanguage::MethodName prop_getter_method(prop_getter_name, true); 2827 prop_getter_name = prop_getter_method.GetSelector().GetCString(); 2828 } 2829 2830 if (prop_setter_name && prop_setter_name[0] == '-') { 2831 ObjCLanguage::MethodName prop_setter_method(prop_setter_name, true); 2832 prop_setter_name = prop_setter_method.GetSelector().GetCString(); 2833 } 2834 2835 // If the names haven't been provided, they need to be filled in. 2836 2837 if (!prop_getter_name) { 2838 prop_getter_name = prop_name; 2839 } 2840 if (!prop_setter_name && prop_name[0] && 2841 !(prop_attributes & DW_APPLE_PROPERTY_readonly)) { 2842 StreamString ss; 2843 2844 ss.Printf("set%c%s:", toupper(prop_name[0]), &prop_name[1]); 2845 2846 fixed_setter.SetString(ss.GetString()); 2847 prop_setter_name = fixed_setter.GetCString(); 2848 } 2849 } 2850 2851 // Clang has a DWARF generation bug where sometimes it represents 2852 // fields that are references with bad byte size and bit size/offset 2853 // information such as: 2854 // 2855 // DW_AT_byte_size( 0x00 ) 2856 // DW_AT_bit_size( 0x40 ) 2857 // DW_AT_bit_offset( 0xffffffffffffffc0 ) 2858 // 2859 // So check the bit offset to make sure it is sane, and if the values 2860 // are not sane, remove them. If we don't do this then we will end up 2861 // with a crash if we try to use this type in an expression when clang 2862 // becomes unhappy with its recycled debug info. 2863 2864 if (byte_size.getValueOr(0) == 0 && bit_offset < 0) { 2865 bit_size = 0; 2866 bit_offset = 0; 2867 } 2868 2869 // FIXME: Make Clang ignore Objective-C accessibility for expressions 2870 if (class_language == eLanguageTypeObjC || 2871 class_language == eLanguageTypeObjC_plus_plus) 2872 accessibility = eAccessNone; 2873 2874 // Handle static members 2875 if (is_external && member_byte_offset == UINT32_MAX) { 2876 Type *var_type = die.ResolveTypeUID(DIERef(encoding_form)); 2877 2878 if (var_type) { 2879 if (accessibility == eAccessNone) 2880 accessibility = eAccessPublic; 2881 ClangASTContext::AddVariableToRecordType( 2882 class_clang_type, name, var_type->GetLayoutCompilerType(), 2883 accessibility); 2884 } 2885 break; 2886 } 2887 2888 if (!is_artificial) { 2889 Type *member_type = die.ResolveTypeUID(DIERef(encoding_form)); 2890 2891 clang::FieldDecl *field_decl = NULL; 2892 if (tag == DW_TAG_member) { 2893 if (member_type) { 2894 if (accessibility == eAccessNone) 2895 accessibility = default_accessibility; 2896 member_accessibilities.push_back(accessibility); 2897 2898 uint64_t field_bit_offset = 2899 (member_byte_offset == UINT32_MAX ? 0 2900 : (member_byte_offset * 8)); 2901 if (bit_size > 0) { 2902 2903 BitfieldInfo this_field_info; 2904 this_field_info.bit_offset = field_bit_offset; 2905 this_field_info.bit_size = bit_size; 2906 2907 ///////////////////////////////////////////////////////////// 2908 // How to locate a field given the DWARF debug information 2909 // 2910 // AT_byte_size indicates the size of the word in which the bit 2911 // offset must be interpreted. 2912 // 2913 // AT_data_member_location indicates the byte offset of the 2914 // word from the base address of the structure. 2915 // 2916 // AT_bit_offset indicates how many bits into the word 2917 // (according to the host endianness) the low-order bit of the 2918 // field starts. AT_bit_offset can be negative. 2919 // 2920 // AT_bit_size indicates the size of the field in bits. 2921 ///////////////////////////////////////////////////////////// 2922 2923 if (data_bit_offset != UINT64_MAX) { 2924 this_field_info.bit_offset = data_bit_offset; 2925 } else { 2926 if (!byte_size) 2927 byte_size = member_type->GetByteSize(); 2928 2929 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 2930 if (objfile->GetByteOrder() == eByteOrderLittle) { 2931 this_field_info.bit_offset += byte_size.getValueOr(0) * 8; 2932 this_field_info.bit_offset -= (bit_offset + bit_size); 2933 } else { 2934 this_field_info.bit_offset += bit_offset; 2935 } 2936 } 2937 2938 if ((this_field_info.bit_offset >= parent_bit_size) || 2939 !last_field_info.NextBitfieldOffsetIsValid( 2940 this_field_info.bit_offset)) { 2941 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 2942 objfile->GetModule()->ReportWarning( 2943 "0x%8.8" PRIx64 ": %s bitfield named \"%s\" has invalid " 2944 "bit offset (0x%8.8" PRIx64 2945 ") member will be ignored. Please file a bug against the " 2946 "compiler and include the preprocessed output for %s\n", 2947 die.GetID(), DW_TAG_value_to_name(tag), name, 2948 this_field_info.bit_offset, 2949 sc.comp_unit ? sc.comp_unit->GetPath().c_str() 2950 : "the source file"); 2951 this_field_info.Clear(); 2952 continue; 2953 } 2954 2955 // Update the field bit offset we will report for layout 2956 field_bit_offset = this_field_info.bit_offset; 2957 2958 // If the member to be emitted did not start on a character 2959 // boundary and there is empty space between the last field and 2960 // this one, then we need to emit an anonymous member filling 2961 // up the space up to its start. There are three cases here: 2962 // 2963 // 1 If the previous member ended on a character boundary, then 2964 // we can emit an 2965 // anonymous member starting at the most recent character 2966 // boundary. 2967 // 2968 // 2 If the previous member did not end on a character boundary 2969 // and the distance 2970 // from the end of the previous member to the current member 2971 // is less than a 2972 // word width, then we can emit an anonymous member starting 2973 // right after the 2974 // previous member and right before this member. 2975 // 2976 // 3 If the previous member did not end on a character boundary 2977 // and the distance 2978 // from the end of the previous member to the current member 2979 // is greater than 2980 // or equal a word width, then we act as in Case 1. 2981 2982 const uint64_t character_width = 8; 2983 const uint64_t word_width = 32; 2984 2985 // Objective-C has invalid DW_AT_bit_offset values in older 2986 // versions of clang, so we have to be careful and only insert 2987 // unnamed bitfields if we have a new enough clang. 2988 bool detect_unnamed_bitfields = true; 2989 2990 if (class_language == eLanguageTypeObjC || 2991 class_language == eLanguageTypeObjC_plus_plus) 2992 detect_unnamed_bitfields = 2993 die.GetCU()->Supports_unnamed_objc_bitfields(); 2994 2995 if (detect_unnamed_bitfields) { 2996 BitfieldInfo anon_field_info; 2997 2998 if ((this_field_info.bit_offset % character_width) != 2999 0) // not char aligned 3000 { 3001 uint64_t last_field_end = 0; 3002 3003 if (last_field_info.IsValid()) 3004 last_field_end = 3005 last_field_info.bit_offset + last_field_info.bit_size; 3006 3007 if (this_field_info.bit_offset != last_field_end) { 3008 if (((last_field_end % character_width) == 0) || // case 1 3009 (this_field_info.bit_offset - last_field_end >= 3010 word_width)) // case 3 3011 { 3012 anon_field_info.bit_size = 3013 this_field_info.bit_offset % character_width; 3014 anon_field_info.bit_offset = 3015 this_field_info.bit_offset - 3016 anon_field_info.bit_size; 3017 } else // case 2 3018 { 3019 anon_field_info.bit_size = 3020 this_field_info.bit_offset - last_field_end; 3021 anon_field_info.bit_offset = last_field_end; 3022 } 3023 } 3024 } 3025 3026 if (anon_field_info.IsValid()) { 3027 clang::FieldDecl *unnamed_bitfield_decl = 3028 ClangASTContext::AddFieldToRecordType( 3029 class_clang_type, llvm::StringRef(), 3030 m_ast.GetBuiltinTypeForEncodingAndBitSize( 3031 eEncodingSint, word_width), 3032 accessibility, anon_field_info.bit_size); 3033 3034 layout_info.field_offsets.insert(std::make_pair( 3035 unnamed_bitfield_decl, anon_field_info.bit_offset)); 3036 } 3037 } 3038 last_field_info = this_field_info; 3039 } else { 3040 last_field_info.Clear(); 3041 } 3042 3043 CompilerType member_clang_type = 3044 member_type->GetLayoutCompilerType(); 3045 if (!member_clang_type.IsCompleteType()) 3046 member_clang_type.GetCompleteType(); 3047 3048 { 3049 // Older versions of clang emit array[0] and array[1] in the 3050 // same way (<rdar://problem/12566646>). If the current field 3051 // is at the end of the structure, then there is definitely no 3052 // room for extra elements and we override the type to 3053 // array[0]. 3054 3055 CompilerType member_array_element_type; 3056 uint64_t member_array_size; 3057 bool member_array_is_incomplete; 3058 3059 if (member_clang_type.IsArrayType( 3060 &member_array_element_type, &member_array_size, 3061 &member_array_is_incomplete) && 3062 !member_array_is_incomplete) { 3063 uint64_t parent_byte_size = 3064 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 3065 UINT64_MAX); 3066 3067 if (member_byte_offset >= parent_byte_size) { 3068 if (member_array_size != 1 && 3069 (member_array_size != 0 || 3070 member_byte_offset > parent_byte_size)) { 3071 module_sp->ReportError( 3072 "0x%8.8" PRIx64 3073 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 3074 " which extends beyond the bounds of 0x%8.8" PRIx64, 3075 die.GetID(), name, encoding_form.Reference(), 3076 parent_die.GetID()); 3077 } 3078 3079 member_clang_type = m_ast.CreateArrayType( 3080 member_array_element_type, 0, false); 3081 } 3082 } 3083 } 3084 3085 if (ClangASTContext::IsCXXClassType(member_clang_type) && 3086 !member_clang_type.GetCompleteType()) { 3087 if (die.GetCU()->GetProducer() == eProducerClang) 3088 module_sp->ReportError( 3089 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3090 "0x%8.8x (%s) whose type is a forward declaration, not a " 3091 "complete definition.\nTry compiling the source file " 3092 "with -fstandalone-debug", 3093 parent_die.GetOffset(), parent_die.GetName(), 3094 die.GetOffset(), name); 3095 else 3096 module_sp->ReportError( 3097 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3098 "0x%8.8x (%s) whose type is a forward declaration, not a " 3099 "complete definition.\nPlease file a bug against the " 3100 "compiler and include the preprocessed output for %s", 3101 parent_die.GetOffset(), parent_die.GetName(), 3102 die.GetOffset(), name, 3103 sc.comp_unit ? sc.comp_unit->GetPath().c_str() 3104 : "the source file"); 3105 // We have no choice other than to pretend that the member 3106 // class is complete. If we don't do this, clang will crash 3107 // when trying to layout the class. Since we provide layout 3108 // assistance, all ivars in this class and other classes will 3109 // be fine, this is the best we can do short of crashing. 3110 if (ClangASTContext::StartTagDeclarationDefinition( 3111 member_clang_type)) { 3112 ClangASTContext::CompleteTagDeclarationDefinition( 3113 member_clang_type); 3114 } else { 3115 module_sp->ReportError( 3116 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3117 "0x%8.8x (%s) whose type claims to be a C++ class but we " 3118 "were not able to start its definition.\nPlease file a " 3119 "bug and attach the file at the start of this error " 3120 "message", 3121 parent_die.GetOffset(), parent_die.GetName(), 3122 die.GetOffset(), name); 3123 } 3124 } 3125 3126 field_decl = ClangASTContext::AddFieldToRecordType( 3127 class_clang_type, name, member_clang_type, accessibility, 3128 bit_size); 3129 3130 m_ast.SetMetadataAsUserID(field_decl, die.GetID()); 3131 3132 layout_info.field_offsets.insert( 3133 std::make_pair(field_decl, field_bit_offset)); 3134 } else { 3135 if (name) 3136 module_sp->ReportError( 3137 "0x%8.8" PRIx64 3138 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 3139 " which was unable to be parsed", 3140 die.GetID(), name, encoding_form.Reference()); 3141 else 3142 module_sp->ReportError( 3143 "0x%8.8" PRIx64 3144 ": DW_TAG_member refers to type 0x%8.8" PRIx64 3145 " which was unable to be parsed", 3146 die.GetID(), encoding_form.Reference()); 3147 } 3148 } 3149 3150 if (prop_name != NULL && member_type) { 3151 clang::ObjCIvarDecl *ivar_decl = NULL; 3152 3153 if (field_decl) { 3154 ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl); 3155 assert(ivar_decl != NULL); 3156 } 3157 3158 ClangASTMetadata metadata; 3159 metadata.SetUserID(die.GetID()); 3160 delayed_properties.push_back(DelayedAddObjCClassProperty( 3161 class_clang_type, prop_name, 3162 member_type->GetLayoutCompilerType(), ivar_decl, 3163 prop_setter_name, prop_getter_name, prop_attributes, 3164 &metadata)); 3165 3166 if (ivar_decl) 3167 m_ast.SetMetadataAsUserID(ivar_decl, die.GetID()); 3168 } 3169 } 3170 } 3171 ++member_idx; 3172 } break; 3173 3174 case DW_TAG_subprogram: 3175 // Let the type parsing code handle this one for us. 3176 member_function_dies.push_back(die); 3177 break; 3178 3179 case DW_TAG_inheritance: { 3180 is_a_class = true; 3181 if (default_accessibility == eAccessNone) 3182 default_accessibility = eAccessPrivate; 3183 // TODO: implement DW_TAG_inheritance type parsing 3184 DWARFAttributes attributes; 3185 const size_t num_attributes = die.GetAttributes(attributes); 3186 if (num_attributes > 0) { 3187 Declaration decl; 3188 DWARFExpression location(die.GetCU()); 3189 DWARFFormValue encoding_form; 3190 AccessType accessibility = default_accessibility; 3191 bool is_virtual = false; 3192 bool is_base_of_class = true; 3193 off_t member_byte_offset = 0; 3194 uint32_t i; 3195 for (i = 0; i < num_attributes; ++i) { 3196 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3197 DWARFFormValue form_value; 3198 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3199 switch (attr) { 3200 case DW_AT_decl_file: 3201 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 3202 form_value.Unsigned())); 3203 break; 3204 case DW_AT_decl_line: 3205 decl.SetLine(form_value.Unsigned()); 3206 break; 3207 case DW_AT_decl_column: 3208 decl.SetColumn(form_value.Unsigned()); 3209 break; 3210 case DW_AT_type: 3211 encoding_form = form_value; 3212 break; 3213 case DW_AT_data_member_location: 3214 if (form_value.BlockData()) { 3215 Value initialValue(0); 3216 Value memberOffset(0); 3217 const DWARFDataExtractor &debug_info_data = die.GetData(); 3218 uint32_t block_length = form_value.Unsigned(); 3219 uint32_t block_offset = 3220 form_value.BlockData() - debug_info_data.GetDataStart(); 3221 if (DWARFExpression::Evaluate(nullptr, nullptr, module_sp, 3222 debug_info_data, die.GetCU(), 3223 block_offset, block_length, 3224 eRegisterKindDWARF, &initialValue, 3225 nullptr, memberOffset, nullptr)) { 3226 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 3227 } 3228 } else { 3229 // With DWARF 3 and later, if the value is an integer constant, 3230 // this form value is the offset in bytes from the beginning of 3231 // the containing entity. 3232 member_byte_offset = form_value.Unsigned(); 3233 } 3234 break; 3235 3236 case DW_AT_accessibility: 3237 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 3238 break; 3239 3240 case DW_AT_virtuality: 3241 is_virtual = form_value.Boolean(); 3242 break; 3243 3244 case DW_AT_sibling: 3245 break; 3246 3247 default: 3248 break; 3249 } 3250 } 3251 } 3252 3253 Type *base_class_type = die.ResolveTypeUID(DIERef(encoding_form)); 3254 if (base_class_type == NULL) { 3255 module_sp->ReportError("0x%8.8x: DW_TAG_inheritance failed to " 3256 "resolve the base class at 0x%8.8" PRIx64 3257 " from enclosing type 0x%8.8x. \nPlease file " 3258 "a bug and attach the file at the start of " 3259 "this error message", 3260 die.GetOffset(), encoding_form.Reference(), 3261 parent_die.GetOffset()); 3262 break; 3263 } 3264 3265 CompilerType base_class_clang_type = 3266 base_class_type->GetFullCompilerType(); 3267 assert(base_class_clang_type); 3268 if (class_language == eLanguageTypeObjC) { 3269 ast->SetObjCSuperClass(class_clang_type, base_class_clang_type); 3270 } else { 3271 std::unique_ptr<clang::CXXBaseSpecifier> result = 3272 ast->CreateBaseClassSpecifier( 3273 base_class_clang_type.GetOpaqueQualType(), accessibility, 3274 is_virtual, is_base_of_class); 3275 if (!result) 3276 break; 3277 3278 base_classes.push_back(std::move(result)); 3279 3280 if (is_virtual) { 3281 // Do not specify any offset for virtual inheritance. The DWARF 3282 // produced by clang doesn't give us a constant offset, but gives 3283 // us a DWARF expressions that requires an actual object in memory. 3284 // the DW_AT_data_member_location for a virtual base class looks 3285 // like: 3286 // DW_AT_data_member_location( DW_OP_dup, DW_OP_deref, 3287 // DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref, 3288 // DW_OP_plus ) 3289 // Given this, there is really no valid response we can give to 3290 // clang for virtual base class offsets, and this should eventually 3291 // be removed from LayoutRecordType() in the external 3292 // AST source in clang. 3293 } else { 3294 layout_info.base_offsets.insert(std::make_pair( 3295 ast->GetAsCXXRecordDecl( 3296 base_class_clang_type.GetOpaqueQualType()), 3297 clang::CharUnits::fromQuantity(member_byte_offset))); 3298 } 3299 } 3300 } 3301 } break; 3302 3303 default: 3304 break; 3305 } 3306 } 3307 3308 return true; 3309 } 3310 3311 size_t DWARFASTParserClang::ParseChildParameters( 3312 CompileUnit &comp_unit, clang::DeclContext *containing_decl_ctx, 3313 const DWARFDIE &parent_die, bool skip_artificial, bool &is_static, 3314 bool &is_variadic, bool &has_template_params, 3315 std::vector<CompilerType> &function_param_types, 3316 std::vector<clang::ParmVarDecl *> &function_param_decls, 3317 unsigned &type_quals) { 3318 if (!parent_die) 3319 return 0; 3320 3321 size_t arg_idx = 0; 3322 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 3323 die = die.GetSibling()) { 3324 const dw_tag_t tag = die.Tag(); 3325 switch (tag) { 3326 case DW_TAG_formal_parameter: { 3327 DWARFAttributes attributes; 3328 const size_t num_attributes = die.GetAttributes(attributes); 3329 if (num_attributes > 0) { 3330 const char *name = NULL; 3331 Declaration decl; 3332 DWARFFormValue param_type_die_form; 3333 bool is_artificial = false; 3334 // one of None, Auto, Register, Extern, Static, PrivateExtern 3335 3336 clang::StorageClass storage = clang::SC_None; 3337 uint32_t i; 3338 for (i = 0; i < num_attributes; ++i) { 3339 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3340 DWARFFormValue form_value; 3341 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3342 switch (attr) { 3343 case DW_AT_decl_file: 3344 decl.SetFile(comp_unit.GetSupportFiles().GetFileSpecAtIndex( 3345 form_value.Unsigned())); 3346 break; 3347 case DW_AT_decl_line: 3348 decl.SetLine(form_value.Unsigned()); 3349 break; 3350 case DW_AT_decl_column: 3351 decl.SetColumn(form_value.Unsigned()); 3352 break; 3353 case DW_AT_name: 3354 name = form_value.AsCString(); 3355 break; 3356 case DW_AT_type: 3357 param_type_die_form = form_value; 3358 break; 3359 case DW_AT_artificial: 3360 is_artificial = form_value.Boolean(); 3361 break; 3362 case DW_AT_location: 3363 case DW_AT_const_value: 3364 case DW_AT_default_value: 3365 case DW_AT_description: 3366 case DW_AT_endianity: 3367 case DW_AT_is_optional: 3368 case DW_AT_segment: 3369 case DW_AT_variable_parameter: 3370 default: 3371 case DW_AT_abstract_origin: 3372 case DW_AT_sibling: 3373 break; 3374 } 3375 } 3376 } 3377 3378 bool skip = false; 3379 if (skip_artificial && is_artificial) { 3380 // In order to determine if a C++ member function is "const" we 3381 // have to look at the const-ness of "this"... 3382 if (arg_idx == 0 && 3383 DeclKindIsCXXClass(containing_decl_ctx->getDeclKind()) && 3384 // Often times compilers omit the "this" name for the 3385 // specification DIEs, so we can't rely upon the name being in 3386 // the formal parameter DIE... 3387 (name == NULL || ::strcmp(name, "this") == 0)) { 3388 Type *this_type = die.ResolveTypeUID(DIERef(param_type_die_form)); 3389 if (this_type) { 3390 uint32_t encoding_mask = this_type->GetEncodingMask(); 3391 if (encoding_mask & Type::eEncodingIsPointerUID) { 3392 is_static = false; 3393 3394 if (encoding_mask & (1u << Type::eEncodingIsConstUID)) 3395 type_quals |= clang::Qualifiers::Const; 3396 if (encoding_mask & (1u << Type::eEncodingIsVolatileUID)) 3397 type_quals |= clang::Qualifiers::Volatile; 3398 } 3399 } 3400 } 3401 skip = true; 3402 } 3403 3404 if (!skip) { 3405 Type *type = die.ResolveTypeUID(DIERef(param_type_die_form)); 3406 if (type) { 3407 function_param_types.push_back(type->GetForwardCompilerType()); 3408 3409 clang::ParmVarDecl *param_var_decl = 3410 m_ast.CreateParameterDeclaration(containing_decl_ctx, name, 3411 type->GetForwardCompilerType(), 3412 storage); 3413 assert(param_var_decl); 3414 function_param_decls.push_back(param_var_decl); 3415 3416 m_ast.SetMetadataAsUserID(param_var_decl, die.GetID()); 3417 } 3418 } 3419 } 3420 arg_idx++; 3421 } break; 3422 3423 case DW_TAG_unspecified_parameters: 3424 is_variadic = true; 3425 break; 3426 3427 case DW_TAG_template_type_parameter: 3428 case DW_TAG_template_value_parameter: 3429 case DW_TAG_GNU_template_parameter_pack: 3430 // The one caller of this was never using the template_param_infos, and 3431 // the local variable was taking up a large amount of stack space in 3432 // SymbolFileDWARF::ParseType() so this was removed. If we ever need the 3433 // template params back, we can add them back. 3434 // ParseTemplateDIE (dwarf_cu, die, template_param_infos); 3435 has_template_params = true; 3436 break; 3437 3438 default: 3439 break; 3440 } 3441 } 3442 return arg_idx; 3443 } 3444 3445 llvm::Optional<SymbolFile::ArrayInfo> 3446 DWARFASTParser::ParseChildArrayInfo(const DWARFDIE &parent_die, 3447 const ExecutionContext *exe_ctx) { 3448 SymbolFile::ArrayInfo array_info; 3449 if (!parent_die) 3450 return llvm::None; 3451 3452 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 3453 die = die.GetSibling()) { 3454 const dw_tag_t tag = die.Tag(); 3455 switch (tag) { 3456 case DW_TAG_subrange_type: { 3457 DWARFAttributes attributes; 3458 const size_t num_child_attributes = die.GetAttributes(attributes); 3459 if (num_child_attributes > 0) { 3460 uint64_t num_elements = 0; 3461 uint64_t lower_bound = 0; 3462 uint64_t upper_bound = 0; 3463 bool upper_bound_valid = false; 3464 uint32_t i; 3465 for (i = 0; i < num_child_attributes; ++i) { 3466 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3467 DWARFFormValue form_value; 3468 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3469 switch (attr) { 3470 case DW_AT_name: 3471 break; 3472 3473 case DW_AT_count: 3474 if (DWARFDIE var_die = die.GetReferencedDIE(DW_AT_count)) { 3475 if (var_die.Tag() == DW_TAG_variable) 3476 if (exe_ctx) { 3477 if (auto frame = exe_ctx->GetFrameSP()) { 3478 Status error; 3479 lldb::VariableSP var_sp; 3480 auto valobj_sp = frame->GetValueForVariableExpressionPath( 3481 var_die.GetName(), eNoDynamicValues, 0, var_sp, 3482 error); 3483 if (valobj_sp) { 3484 num_elements = valobj_sp->GetValueAsUnsigned(0); 3485 break; 3486 } 3487 } 3488 } 3489 } else 3490 num_elements = form_value.Unsigned(); 3491 break; 3492 3493 case DW_AT_bit_stride: 3494 array_info.bit_stride = form_value.Unsigned(); 3495 break; 3496 3497 case DW_AT_byte_stride: 3498 array_info.byte_stride = form_value.Unsigned(); 3499 break; 3500 3501 case DW_AT_lower_bound: 3502 lower_bound = form_value.Unsigned(); 3503 break; 3504 3505 case DW_AT_upper_bound: 3506 upper_bound_valid = true; 3507 upper_bound = form_value.Unsigned(); 3508 break; 3509 3510 default: 3511 case DW_AT_abstract_origin: 3512 case DW_AT_accessibility: 3513 case DW_AT_allocated: 3514 case DW_AT_associated: 3515 case DW_AT_data_location: 3516 case DW_AT_declaration: 3517 case DW_AT_description: 3518 case DW_AT_sibling: 3519 case DW_AT_threads_scaled: 3520 case DW_AT_type: 3521 case DW_AT_visibility: 3522 break; 3523 } 3524 } 3525 } 3526 3527 if (num_elements == 0) { 3528 if (upper_bound_valid && upper_bound >= lower_bound) 3529 num_elements = upper_bound - lower_bound + 1; 3530 } 3531 3532 array_info.element_orders.push_back(num_elements); 3533 } 3534 } break; 3535 } 3536 } 3537 return array_info; 3538 } 3539 3540 Type *DWARFASTParserClang::GetTypeForDIE(const DWARFDIE &die) { 3541 if (die) { 3542 SymbolFileDWARF *dwarf = die.GetDWARF(); 3543 DWARFAttributes attributes; 3544 const size_t num_attributes = die.GetAttributes(attributes); 3545 if (num_attributes > 0) { 3546 DWARFFormValue type_die_form; 3547 for (size_t i = 0; i < num_attributes; ++i) { 3548 dw_attr_t attr = attributes.AttributeAtIndex(i); 3549 DWARFFormValue form_value; 3550 3551 if (attr == DW_AT_type && 3552 attributes.ExtractFormValueAtIndex(i, form_value)) 3553 return dwarf->ResolveTypeUID(dwarf->GetDIE(DIERef(form_value)), true); 3554 } 3555 } 3556 } 3557 3558 return nullptr; 3559 } 3560 3561 clang::Decl *DWARFASTParserClang::GetClangDeclForDIE(const DWARFDIE &die) { 3562 if (!die) 3563 return nullptr; 3564 3565 switch (die.Tag()) { 3566 case DW_TAG_variable: 3567 case DW_TAG_constant: 3568 case DW_TAG_formal_parameter: 3569 case DW_TAG_imported_declaration: 3570 case DW_TAG_imported_module: 3571 break; 3572 default: 3573 return nullptr; 3574 } 3575 3576 DIEToDeclMap::iterator cache_pos = m_die_to_decl.find(die.GetDIE()); 3577 if (cache_pos != m_die_to_decl.end()) 3578 return cache_pos->second; 3579 3580 if (DWARFDIE spec_die = die.GetReferencedDIE(DW_AT_specification)) { 3581 clang::Decl *decl = GetClangDeclForDIE(spec_die); 3582 m_die_to_decl[die.GetDIE()] = decl; 3583 m_decl_to_die[decl].insert(die.GetDIE()); 3584 return decl; 3585 } 3586 3587 if (DWARFDIE abstract_origin_die = 3588 die.GetReferencedDIE(DW_AT_abstract_origin)) { 3589 clang::Decl *decl = GetClangDeclForDIE(abstract_origin_die); 3590 m_die_to_decl[die.GetDIE()] = decl; 3591 m_decl_to_die[decl].insert(die.GetDIE()); 3592 return decl; 3593 } 3594 3595 clang::Decl *decl = nullptr; 3596 switch (die.Tag()) { 3597 case DW_TAG_variable: 3598 case DW_TAG_constant: 3599 case DW_TAG_formal_parameter: { 3600 SymbolFileDWARF *dwarf = die.GetDWARF(); 3601 Type *type = GetTypeForDIE(die); 3602 if (dwarf && type) { 3603 const char *name = die.GetName(); 3604 clang::DeclContext *decl_context = 3605 ClangASTContext::DeclContextGetAsDeclContext( 3606 dwarf->GetDeclContextContainingUID(die.GetID())); 3607 decl = m_ast.CreateVariableDeclaration( 3608 decl_context, name, 3609 ClangUtil::GetQualType(type->GetForwardCompilerType())); 3610 } 3611 break; 3612 } 3613 case DW_TAG_imported_declaration: { 3614 SymbolFileDWARF *dwarf = die.GetDWARF(); 3615 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3616 if (imported_uid) { 3617 CompilerDecl imported_decl = imported_uid.GetDecl(); 3618 if (imported_decl) { 3619 clang::DeclContext *decl_context = 3620 ClangASTContext::DeclContextGetAsDeclContext( 3621 dwarf->GetDeclContextContainingUID(die.GetID())); 3622 if (clang::NamedDecl *clang_imported_decl = 3623 llvm::dyn_cast<clang::NamedDecl>( 3624 (clang::Decl *)imported_decl.GetOpaqueDecl())) 3625 decl = 3626 m_ast.CreateUsingDeclaration(decl_context, clang_imported_decl); 3627 } 3628 } 3629 break; 3630 } 3631 case DW_TAG_imported_module: { 3632 SymbolFileDWARF *dwarf = die.GetDWARF(); 3633 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3634 3635 if (imported_uid) { 3636 CompilerDeclContext imported_decl_ctx = imported_uid.GetDeclContext(); 3637 if (imported_decl_ctx) { 3638 clang::DeclContext *decl_context = 3639 ClangASTContext::DeclContextGetAsDeclContext( 3640 dwarf->GetDeclContextContainingUID(die.GetID())); 3641 if (clang::NamespaceDecl *ns_decl = 3642 ClangASTContext::DeclContextGetAsNamespaceDecl( 3643 imported_decl_ctx)) 3644 decl = m_ast.CreateUsingDirectiveDeclaration(decl_context, ns_decl); 3645 } 3646 } 3647 break; 3648 } 3649 default: 3650 break; 3651 } 3652 3653 m_die_to_decl[die.GetDIE()] = decl; 3654 m_decl_to_die[decl].insert(die.GetDIE()); 3655 3656 return decl; 3657 } 3658 3659 clang::DeclContext * 3660 DWARFASTParserClang::GetClangDeclContextForDIE(const DWARFDIE &die) { 3661 if (die) { 3662 clang::DeclContext *decl_ctx = GetCachedClangDeclContextForDIE(die); 3663 if (decl_ctx) 3664 return decl_ctx; 3665 3666 bool try_parsing_type = true; 3667 switch (die.Tag()) { 3668 case DW_TAG_compile_unit: 3669 case DW_TAG_partial_unit: 3670 decl_ctx = m_ast.GetTranslationUnitDecl(); 3671 try_parsing_type = false; 3672 break; 3673 3674 case DW_TAG_namespace: 3675 decl_ctx = ResolveNamespaceDIE(die); 3676 try_parsing_type = false; 3677 break; 3678 3679 case DW_TAG_lexical_block: 3680 decl_ctx = GetDeclContextForBlock(die); 3681 try_parsing_type = false; 3682 break; 3683 3684 default: 3685 break; 3686 } 3687 3688 if (decl_ctx == nullptr && try_parsing_type) { 3689 Type *type = die.GetDWARF()->ResolveType(die); 3690 if (type) 3691 decl_ctx = GetCachedClangDeclContextForDIE(die); 3692 } 3693 3694 if (decl_ctx) { 3695 LinkDeclContextToDIE(decl_ctx, die); 3696 return decl_ctx; 3697 } 3698 } 3699 return nullptr; 3700 } 3701 3702 static bool IsSubroutine(const DWARFDIE &die) { 3703 switch (die.Tag()) { 3704 case DW_TAG_subprogram: 3705 case DW_TAG_inlined_subroutine: 3706 return true; 3707 default: 3708 return false; 3709 } 3710 } 3711 3712 static DWARFDIE GetContainingFunctionWithAbstractOrigin(const DWARFDIE &die) { 3713 for (DWARFDIE candidate = die; candidate; candidate = candidate.GetParent()) { 3714 if (IsSubroutine(candidate)) { 3715 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3716 return candidate; 3717 } else { 3718 return DWARFDIE(); 3719 } 3720 } 3721 } 3722 assert(0 && "Shouldn't call GetContainingFunctionWithAbstractOrigin on " 3723 "something not in a function"); 3724 return DWARFDIE(); 3725 } 3726 3727 static DWARFDIE FindAnyChildWithAbstractOrigin(const DWARFDIE &context) { 3728 for (DWARFDIE candidate = context.GetFirstChild(); candidate.IsValid(); 3729 candidate = candidate.GetSibling()) { 3730 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3731 return candidate; 3732 } 3733 } 3734 return DWARFDIE(); 3735 } 3736 3737 static DWARFDIE FindFirstChildWithAbstractOrigin(const DWARFDIE &block, 3738 const DWARFDIE &function) { 3739 assert(IsSubroutine(function)); 3740 for (DWARFDIE context = block; context != function.GetParent(); 3741 context = context.GetParent()) { 3742 assert(!IsSubroutine(context) || context == function); 3743 if (DWARFDIE child = FindAnyChildWithAbstractOrigin(context)) { 3744 return child; 3745 } 3746 } 3747 return DWARFDIE(); 3748 } 3749 3750 clang::DeclContext * 3751 DWARFASTParserClang::GetDeclContextForBlock(const DWARFDIE &die) { 3752 assert(die.Tag() == DW_TAG_lexical_block); 3753 DWARFDIE containing_function_with_abstract_origin = 3754 GetContainingFunctionWithAbstractOrigin(die); 3755 if (!containing_function_with_abstract_origin) { 3756 return (clang::DeclContext *)ResolveBlockDIE(die); 3757 } 3758 DWARFDIE child = FindFirstChildWithAbstractOrigin( 3759 die, containing_function_with_abstract_origin); 3760 CompilerDeclContext decl_context = 3761 GetDeclContextContainingUIDFromDWARF(child); 3762 return (clang::DeclContext *)decl_context.GetOpaqueDeclContext(); 3763 } 3764 3765 clang::BlockDecl *DWARFASTParserClang::ResolveBlockDIE(const DWARFDIE &die) { 3766 if (die && die.Tag() == DW_TAG_lexical_block) { 3767 clang::BlockDecl *decl = 3768 llvm::cast_or_null<clang::BlockDecl>(m_die_to_decl_ctx[die.GetDIE()]); 3769 3770 if (!decl) { 3771 DWARFDIE decl_context_die; 3772 clang::DeclContext *decl_context = 3773 GetClangDeclContextContainingDIE(die, &decl_context_die); 3774 decl = m_ast.CreateBlockDeclaration(decl_context); 3775 3776 if (decl) 3777 LinkDeclContextToDIE((clang::DeclContext *)decl, die); 3778 } 3779 3780 return decl; 3781 } 3782 return nullptr; 3783 } 3784 3785 clang::NamespaceDecl * 3786 DWARFASTParserClang::ResolveNamespaceDIE(const DWARFDIE &die) { 3787 if (die && die.Tag() == DW_TAG_namespace) { 3788 // See if we already parsed this namespace DIE and associated it with a 3789 // uniqued namespace declaration 3790 clang::NamespaceDecl *namespace_decl = 3791 static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die.GetDIE()]); 3792 if (namespace_decl) 3793 return namespace_decl; 3794 else { 3795 const char *namespace_name = die.GetName(); 3796 clang::DeclContext *containing_decl_ctx = 3797 GetClangDeclContextContainingDIE(die, nullptr); 3798 bool is_inline = 3799 die.GetAttributeValueAsUnsigned(DW_AT_export_symbols, 0) != 0; 3800 3801 namespace_decl = m_ast.GetUniqueNamespaceDeclaration( 3802 namespace_name, containing_decl_ctx, is_inline); 3803 Log *log = 3804 nullptr; // (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 3805 if (log) { 3806 SymbolFileDWARF *dwarf = die.GetDWARF(); 3807 if (namespace_name) { 3808 dwarf->GetObjectFile()->GetModule()->LogMessage( 3809 log, "ASTContext => %p: 0x%8.8" PRIx64 3810 ": DW_TAG_namespace with DW_AT_name(\"%s\") => " 3811 "clang::NamespaceDecl *%p (original = %p)", 3812 static_cast<void *>(m_ast.getASTContext()), die.GetID(), 3813 namespace_name, static_cast<void *>(namespace_decl), 3814 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3815 } else { 3816 dwarf->GetObjectFile()->GetModule()->LogMessage( 3817 log, "ASTContext => %p: 0x%8.8" PRIx64 3818 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p " 3819 "(original = %p)", 3820 static_cast<void *>(m_ast.getASTContext()), die.GetID(), 3821 static_cast<void *>(namespace_decl), 3822 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3823 } 3824 } 3825 3826 if (namespace_decl) 3827 LinkDeclContextToDIE((clang::DeclContext *)namespace_decl, die); 3828 return namespace_decl; 3829 } 3830 } 3831 return nullptr; 3832 } 3833 3834 clang::DeclContext *DWARFASTParserClang::GetClangDeclContextContainingDIE( 3835 const DWARFDIE &die, DWARFDIE *decl_ctx_die_copy) { 3836 SymbolFileDWARF *dwarf = die.GetDWARF(); 3837 3838 DWARFDIE decl_ctx_die = dwarf->GetDeclContextDIEContainingDIE(die); 3839 3840 if (decl_ctx_die_copy) 3841 *decl_ctx_die_copy = decl_ctx_die; 3842 3843 if (decl_ctx_die) { 3844 clang::DeclContext *clang_decl_ctx = 3845 GetClangDeclContextForDIE(decl_ctx_die); 3846 if (clang_decl_ctx) 3847 return clang_decl_ctx; 3848 } 3849 return m_ast.GetTranslationUnitDecl(); 3850 } 3851 3852 clang::DeclContext * 3853 DWARFASTParserClang::GetCachedClangDeclContextForDIE(const DWARFDIE &die) { 3854 if (die) { 3855 DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find(die.GetDIE()); 3856 if (pos != m_die_to_decl_ctx.end()) 3857 return pos->second; 3858 } 3859 return nullptr; 3860 } 3861 3862 void DWARFASTParserClang::LinkDeclContextToDIE(clang::DeclContext *decl_ctx, 3863 const DWARFDIE &die) { 3864 m_die_to_decl_ctx[die.GetDIE()] = decl_ctx; 3865 // There can be many DIEs for a single decl context 3866 // m_decl_ctx_to_die[decl_ctx].insert(die.GetDIE()); 3867 m_decl_ctx_to_die.insert(std::make_pair(decl_ctx, die)); 3868 } 3869 3870 bool DWARFASTParserClang::CopyUniqueClassMethodTypes( 3871 const DWARFDIE &src_class_die, const DWARFDIE &dst_class_die, 3872 lldb_private::Type *class_type, std::vector<DWARFDIE> &failures) { 3873 if (!class_type || !src_class_die || !dst_class_die) 3874 return false; 3875 if (src_class_die.Tag() != dst_class_die.Tag()) 3876 return false; 3877 3878 // We need to complete the class type so we can get all of the method types 3879 // parsed so we can then unique those types to their equivalent counterparts 3880 // in "dst_cu" and "dst_class_die" 3881 class_type->GetFullCompilerType(); 3882 3883 DWARFDIE src_die; 3884 DWARFDIE dst_die; 3885 UniqueCStringMap<DWARFDIE> src_name_to_die; 3886 UniqueCStringMap<DWARFDIE> dst_name_to_die; 3887 UniqueCStringMap<DWARFDIE> src_name_to_die_artificial; 3888 UniqueCStringMap<DWARFDIE> dst_name_to_die_artificial; 3889 for (src_die = src_class_die.GetFirstChild(); src_die.IsValid(); 3890 src_die = src_die.GetSibling()) { 3891 if (src_die.Tag() == DW_TAG_subprogram) { 3892 // Make sure this is a declaration and not a concrete instance by looking 3893 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3894 // are placed inside the class definitions and shouldn't be included in 3895 // the list of things are are tracking here. 3896 if (src_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 3897 const char *src_name = src_die.GetMangledName(); 3898 if (src_name) { 3899 ConstString src_const_name(src_name); 3900 if (src_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3901 src_name_to_die_artificial.Append(src_const_name, src_die); 3902 else 3903 src_name_to_die.Append(src_const_name, src_die); 3904 } 3905 } 3906 } 3907 } 3908 for (dst_die = dst_class_die.GetFirstChild(); dst_die.IsValid(); 3909 dst_die = dst_die.GetSibling()) { 3910 if (dst_die.Tag() == DW_TAG_subprogram) { 3911 // Make sure this is a declaration and not a concrete instance by looking 3912 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3913 // are placed inside the class definitions and shouldn't be included in 3914 // the list of things are are tracking here. 3915 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 3916 const char *dst_name = dst_die.GetMangledName(); 3917 if (dst_name) { 3918 ConstString dst_const_name(dst_name); 3919 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3920 dst_name_to_die_artificial.Append(dst_const_name, dst_die); 3921 else 3922 dst_name_to_die.Append(dst_const_name, dst_die); 3923 } 3924 } 3925 } 3926 } 3927 const uint32_t src_size = src_name_to_die.GetSize(); 3928 const uint32_t dst_size = dst_name_to_die.GetSize(); 3929 Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | 3930 // DWARF_LOG_TYPE_COMPLETION)); 3931 3932 // Is everything kosher so we can go through the members at top speed? 3933 bool fast_path = true; 3934 3935 if (src_size != dst_size) { 3936 if (src_size != 0 && dst_size != 0) { 3937 if (log) 3938 log->Printf("warning: trying to unique class DIE 0x%8.8x to 0x%8.8x, " 3939 "but they didn't have the same size (src=%d, dst=%d)", 3940 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3941 src_size, dst_size); 3942 } 3943 3944 fast_path = false; 3945 } 3946 3947 uint32_t idx; 3948 3949 if (fast_path) { 3950 for (idx = 0; idx < src_size; ++idx) { 3951 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 3952 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3953 3954 if (src_die.Tag() != dst_die.Tag()) { 3955 if (log) 3956 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 3957 "but 0x%8.8x (%s) tags didn't match 0x%8.8x (%s)", 3958 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3959 src_die.GetOffset(), src_die.GetTagAsCString(), 3960 dst_die.GetOffset(), dst_die.GetTagAsCString()); 3961 fast_path = false; 3962 } 3963 3964 const char *src_name = src_die.GetMangledName(); 3965 const char *dst_name = dst_die.GetMangledName(); 3966 3967 // Make sure the names match 3968 if (src_name == dst_name || (strcmp(src_name, dst_name) == 0)) 3969 continue; 3970 3971 if (log) 3972 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 3973 "but 0x%8.8x (%s) names didn't match 0x%8.8x (%s)", 3974 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3975 src_die.GetOffset(), src_name, dst_die.GetOffset(), 3976 dst_name); 3977 3978 fast_path = false; 3979 } 3980 } 3981 3982 DWARFASTParserClang *src_dwarf_ast_parser = 3983 (DWARFASTParserClang *)src_die.GetDWARFParser(); 3984 DWARFASTParserClang *dst_dwarf_ast_parser = 3985 (DWARFASTParserClang *)dst_die.GetDWARFParser(); 3986 3987 // Now do the work of linking the DeclContexts and Types. 3988 if (fast_path) { 3989 // We can do this quickly. Just run across the tables index-for-index 3990 // since we know each node has matching names and tags. 3991 for (idx = 0; idx < src_size; ++idx) { 3992 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 3993 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3994 3995 clang::DeclContext *src_decl_ctx = 3996 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3997 if (src_decl_ctx) { 3998 if (log) 3999 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4000 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 4001 dst_die.GetOffset()); 4002 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 4003 } else { 4004 if (log) 4005 log->Printf("warning: tried to unique decl context from 0x%8.8x for " 4006 "0x%8.8x, but none was found", 4007 src_die.GetOffset(), dst_die.GetOffset()); 4008 } 4009 4010 Type *src_child_type = 4011 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4012 if (src_child_type) { 4013 if (log) 4014 log->Printf( 4015 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 4016 static_cast<void *>(src_child_type), src_child_type->GetID(), 4017 src_die.GetOffset(), dst_die.GetOffset()); 4018 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 4019 } else { 4020 if (log) 4021 log->Printf("warning: tried to unique lldb_private::Type from " 4022 "0x%8.8x for 0x%8.8x, but none was found", 4023 src_die.GetOffset(), dst_die.GetOffset()); 4024 } 4025 } 4026 } else { 4027 // We must do this slowly. For each member of the destination, look up a 4028 // member in the source with the same name, check its tag, and unique them 4029 // if everything matches up. Report failures. 4030 4031 if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty()) { 4032 src_name_to_die.Sort(); 4033 4034 for (idx = 0; idx < dst_size; ++idx) { 4035 ConstString dst_name = dst_name_to_die.GetCStringAtIndex(idx); 4036 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 4037 src_die = src_name_to_die.Find(dst_name, DWARFDIE()); 4038 4039 if (src_die && (src_die.Tag() == dst_die.Tag())) { 4040 clang::DeclContext *src_decl_ctx = 4041 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4042 if (src_decl_ctx) { 4043 if (log) 4044 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4045 static_cast<void *>(src_decl_ctx), 4046 src_die.GetOffset(), dst_die.GetOffset()); 4047 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 4048 } else { 4049 if (log) 4050 log->Printf("warning: tried to unique decl context from 0x%8.8x " 4051 "for 0x%8.8x, but none was found", 4052 src_die.GetOffset(), dst_die.GetOffset()); 4053 } 4054 4055 Type *src_child_type = 4056 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4057 if (src_child_type) { 4058 if (log) 4059 log->Printf("uniquing type %p (uid=0x%" PRIx64 4060 ") from 0x%8.8x for 0x%8.8x", 4061 static_cast<void *>(src_child_type), 4062 src_child_type->GetID(), src_die.GetOffset(), 4063 dst_die.GetOffset()); 4064 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = 4065 src_child_type; 4066 } else { 4067 if (log) 4068 log->Printf("warning: tried to unique lldb_private::Type from " 4069 "0x%8.8x for 0x%8.8x, but none was found", 4070 src_die.GetOffset(), dst_die.GetOffset()); 4071 } 4072 } else { 4073 if (log) 4074 log->Printf("warning: couldn't find a match for 0x%8.8x", 4075 dst_die.GetOffset()); 4076 4077 failures.push_back(dst_die); 4078 } 4079 } 4080 } 4081 } 4082 4083 const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize(); 4084 const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize(); 4085 4086 if (src_size_artificial && dst_size_artificial) { 4087 dst_name_to_die_artificial.Sort(); 4088 4089 for (idx = 0; idx < src_size_artificial; ++idx) { 4090 ConstString src_name_artificial = 4091 src_name_to_die_artificial.GetCStringAtIndex(idx); 4092 src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 4093 dst_die = 4094 dst_name_to_die_artificial.Find(src_name_artificial, DWARFDIE()); 4095 4096 if (dst_die) { 4097 // Both classes have the artificial types, link them 4098 clang::DeclContext *src_decl_ctx = 4099 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4100 if (src_decl_ctx) { 4101 if (log) 4102 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4103 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 4104 dst_die.GetOffset()); 4105 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 4106 } else { 4107 if (log) 4108 log->Printf("warning: tried to unique decl context from 0x%8.8x " 4109 "for 0x%8.8x, but none was found", 4110 src_die.GetOffset(), dst_die.GetOffset()); 4111 } 4112 4113 Type *src_child_type = 4114 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4115 if (src_child_type) { 4116 if (log) 4117 log->Printf( 4118 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 4119 static_cast<void *>(src_child_type), src_child_type->GetID(), 4120 src_die.GetOffset(), dst_die.GetOffset()); 4121 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 4122 } else { 4123 if (log) 4124 log->Printf("warning: tried to unique lldb_private::Type from " 4125 "0x%8.8x for 0x%8.8x, but none was found", 4126 src_die.GetOffset(), dst_die.GetOffset()); 4127 } 4128 } 4129 } 4130 } 4131 4132 if (dst_size_artificial) { 4133 for (idx = 0; idx < dst_size_artificial; ++idx) { 4134 ConstString dst_name_artificial = 4135 dst_name_to_die_artificial.GetCStringAtIndex(idx); 4136 dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 4137 if (log) 4138 log->Printf("warning: need to create artificial method for 0x%8.8x for " 4139 "method '%s'", 4140 dst_die.GetOffset(), dst_name_artificial.GetCString()); 4141 4142 failures.push_back(dst_die); 4143 } 4144 } 4145 4146 return !failures.empty(); 4147 } 4148