1 //===-- DWARFASTParserClang.cpp ---------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include <stdlib.h> 11 12 #include "DWARFASTParserClang.h" 13 #include "DWARFCompileUnit.h" 14 #include "DWARFDIE.h" 15 #include "DWARFDIECollection.h" 16 #include "DWARFDebugInfo.h" 17 #include "DWARFDeclContext.h" 18 #include "DWARFDefines.h" 19 #include "SymbolFileDWARF.h" 20 #include "SymbolFileDWARFDwo.h" 21 #include "SymbolFileDWARFDebugMap.h" 22 #include "UniqueDWARFASTType.h" 23 24 #include "Plugins/Language/ObjC/ObjCLanguage.h" 25 #include "lldb/Core/Module.h" 26 #include "lldb/Core/Value.h" 27 #include "lldb/Host/Host.h" 28 #include "lldb/Symbol/ClangASTImporter.h" 29 #include "lldb/Symbol/ClangExternalASTSourceCommon.h" 30 #include "lldb/Symbol/ClangUtil.h" 31 #include "lldb/Symbol/CompileUnit.h" 32 #include "lldb/Symbol/Function.h" 33 #include "lldb/Symbol/ObjectFile.h" 34 #include "lldb/Symbol/SymbolVendor.h" 35 #include "lldb/Symbol/TypeList.h" 36 #include "lldb/Symbol/TypeMap.h" 37 #include "lldb/Target/Language.h" 38 #include "lldb/Utility/LLDBAssert.h" 39 #include "lldb/Utility/Log.h" 40 #include "lldb/Utility/StreamString.h" 41 42 #include "clang/AST/CXXInheritance.h" 43 #include "clang/AST/DeclCXX.h" 44 #include "clang/AST/DeclObjC.h" 45 46 #include <map> 47 #include <vector> 48 49 //#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN 50 51 #ifdef ENABLE_DEBUG_PRINTF 52 #include <stdio.h> 53 #define DEBUG_PRINTF(fmt, ...) printf(fmt, __VA_ARGS__) 54 #else 55 #define DEBUG_PRINTF(fmt, ...) 56 #endif 57 58 using namespace lldb; 59 using namespace lldb_private; 60 DWARFASTParserClang::DWARFASTParserClang(ClangASTContext &ast) 61 : m_ast(ast), m_die_to_decl_ctx(), m_decl_ctx_to_die() {} 62 63 DWARFASTParserClang::~DWARFASTParserClang() {} 64 65 static AccessType DW_ACCESS_to_AccessType(uint32_t dwarf_accessibility) { 66 switch (dwarf_accessibility) { 67 case DW_ACCESS_public: 68 return eAccessPublic; 69 case DW_ACCESS_private: 70 return eAccessPrivate; 71 case DW_ACCESS_protected: 72 return eAccessProtected; 73 default: 74 break; 75 } 76 return eAccessNone; 77 } 78 79 static bool DeclKindIsCXXClass(clang::Decl::Kind decl_kind) { 80 switch (decl_kind) { 81 case clang::Decl::CXXRecord: 82 case clang::Decl::ClassTemplateSpecialization: 83 return true; 84 default: 85 break; 86 } 87 return false; 88 } 89 90 struct BitfieldInfo { 91 uint64_t bit_size; 92 uint64_t bit_offset; 93 94 BitfieldInfo() 95 : bit_size(LLDB_INVALID_ADDRESS), bit_offset(LLDB_INVALID_ADDRESS) {} 96 97 void Clear() { 98 bit_size = LLDB_INVALID_ADDRESS; 99 bit_offset = LLDB_INVALID_ADDRESS; 100 } 101 102 bool IsValid() const { 103 return (bit_size != LLDB_INVALID_ADDRESS) && 104 (bit_offset != LLDB_INVALID_ADDRESS); 105 } 106 107 bool NextBitfieldOffsetIsValid(const uint64_t next_bit_offset) const { 108 if (IsValid()) { 109 // This bitfield info is valid, so any subsequent bitfields 110 // must not overlap and must be at a higher bit offset than 111 // any previous bitfield + size. 112 return (bit_size + bit_offset) <= next_bit_offset; 113 } else { 114 // If the this BitfieldInfo is not valid, then any offset isOK 115 return true; 116 } 117 } 118 }; 119 120 ClangASTImporter &DWARFASTParserClang::GetClangASTImporter() { 121 if (!m_clang_ast_importer_ap) { 122 m_clang_ast_importer_ap.reset(new ClangASTImporter); 123 } 124 return *m_clang_ast_importer_ap; 125 } 126 127 /// Detect a forward declaration that is nested in a DW_TAG_module. 128 static bool isClangModuleFwdDecl(const DWARFDIE &Die) { 129 if (!Die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0)) 130 return false; 131 auto Parent = Die.GetParent(); 132 while (Parent.IsValid()) { 133 if (Parent.Tag() == DW_TAG_module) 134 return true; 135 Parent = Parent.GetParent(); 136 } 137 return false; 138 } 139 140 TypeSP DWARFASTParserClang::ParseTypeFromDWO(const DWARFDIE &die, Log *log) { 141 ModuleSP dwo_module_sp = die.GetContainingDWOModule(); 142 if (!dwo_module_sp) 143 return TypeSP(); 144 145 // This type comes from an external DWO module. 146 std::vector<CompilerContext> dwo_context; 147 die.GetDWOContext(dwo_context); 148 TypeMap dwo_types; 149 150 if (!dwo_module_sp->GetSymbolVendor()->FindTypes(dwo_context, true, 151 dwo_types)) { 152 if (!isClangModuleFwdDecl(die)) 153 return TypeSP(); 154 155 // Since this this type is defined in one of the Clang modules 156 // imported by this symbol file, search all of them. 157 auto *SymFile = die.GetCU()->GetSymbolFileDWARF(); 158 for (const auto &NameModule : SymFile->getExternalTypeModules()) { 159 if (!NameModule.second) 160 continue; 161 SymbolVendor *SymVendor = NameModule.second->GetSymbolVendor(); 162 if (SymVendor->FindTypes(dwo_context, true, dwo_types)) 163 break; 164 } 165 } 166 167 const size_t num_dwo_types = dwo_types.GetSize(); 168 if (num_dwo_types != 1) 169 return TypeSP(); 170 171 // We found a real definition for this type in the Clang module, so 172 // lets use it and cache the fact that we found a complete type for 173 // this die. 174 TypeSP dwo_type_sp = dwo_types.GetTypeAtIndex(0); 175 if (!dwo_type_sp) 176 return TypeSP(); 177 178 lldb_private::CompilerType dwo_type = dwo_type_sp->GetForwardCompilerType(); 179 180 lldb_private::CompilerType type = 181 GetClangASTImporter().CopyType(m_ast, dwo_type); 182 183 // printf ("copied_qual_type: ast = %p, clang_type = %p, name = 184 // '%s'\n", m_ast, copied_qual_type.getAsOpaquePtr(), 185 // external_type->GetName().GetCString()); 186 if (!type) 187 return TypeSP(); 188 189 SymbolFileDWARF *dwarf = die.GetDWARF(); 190 TypeSP type_sp(new Type( 191 die.GetID(), dwarf, dwo_type_sp->GetName(), dwo_type_sp->GetByteSize(), 192 NULL, LLDB_INVALID_UID, Type::eEncodingInvalid, 193 &dwo_type_sp->GetDeclaration(), type, Type::eResolveStateForward)); 194 195 dwarf->GetTypeList()->Insert(type_sp); 196 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 197 clang::TagDecl *tag_decl = ClangASTContext::GetAsTagDecl(type); 198 if (tag_decl) 199 LinkDeclContextToDIE(tag_decl, die); 200 else { 201 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE(die); 202 if (defn_decl_ctx) 203 LinkDeclContextToDIE(defn_decl_ctx, die); 204 } 205 206 return type_sp; 207 } 208 209 TypeSP DWARFASTParserClang::ParseTypeFromDWARF(const SymbolContext &sc, 210 const DWARFDIE &die, Log *log, 211 bool *type_is_new_ptr) { 212 TypeSP type_sp; 213 214 if (type_is_new_ptr) 215 *type_is_new_ptr = false; 216 217 AccessType accessibility = eAccessNone; 218 if (die) { 219 SymbolFileDWARF *dwarf = die.GetDWARF(); 220 if (log) { 221 DWARFDIE context_die; 222 clang::DeclContext *context = 223 GetClangDeclContextContainingDIE(die, &context_die); 224 225 dwarf->GetObjectFile()->GetModule()->LogMessage( 226 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x, decl_ctx = %p (die " 227 "0x%8.8x)) %s name = '%s')", 228 die.GetOffset(), static_cast<void *>(context), 229 context_die.GetOffset(), die.GetTagAsCString(), die.GetName()); 230 } 231 // 232 // Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 233 // if (log && dwarf_cu) 234 // { 235 // StreamString s; 236 // die->DumpLocation (this, dwarf_cu, s); 237 // dwarf->GetObjectFile()->GetModule()->LogMessage (log, 238 // "SymbolFileDwarf::%s %s", __FUNCTION__, s.GetData()); 239 // 240 // } 241 242 Type *type_ptr = dwarf->GetDIEToType().lookup(die.GetDIE()); 243 TypeList *type_list = dwarf->GetTypeList(); 244 if (type_ptr == NULL) { 245 if (type_is_new_ptr) 246 *type_is_new_ptr = true; 247 248 const dw_tag_t tag = die.Tag(); 249 250 bool is_forward_declaration = false; 251 DWARFAttributes attributes; 252 const char *type_name_cstr = NULL; 253 ConstString type_name_const_str; 254 Type::ResolveState resolve_state = Type::eResolveStateUnresolved; 255 uint64_t byte_size = 0; 256 Declaration decl; 257 258 Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID; 259 CompilerType clang_type; 260 DWARFFormValue form_value; 261 262 dw_attr_t attr; 263 264 switch (tag) { 265 case DW_TAG_typedef: 266 case DW_TAG_base_type: 267 case DW_TAG_pointer_type: 268 case DW_TAG_reference_type: 269 case DW_TAG_rvalue_reference_type: 270 case DW_TAG_const_type: 271 case DW_TAG_restrict_type: 272 case DW_TAG_volatile_type: 273 case DW_TAG_unspecified_type: { 274 // Set a bit that lets us know that we are currently parsing this 275 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 276 277 const size_t num_attributes = die.GetAttributes(attributes); 278 uint32_t encoding = 0; 279 DWARFFormValue encoding_uid; 280 281 if (num_attributes > 0) { 282 uint32_t i; 283 for (i = 0; i < num_attributes; ++i) { 284 attr = attributes.AttributeAtIndex(i); 285 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 286 switch (attr) { 287 case DW_AT_decl_file: 288 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 289 form_value.Unsigned())); 290 break; 291 case DW_AT_decl_line: 292 decl.SetLine(form_value.Unsigned()); 293 break; 294 case DW_AT_decl_column: 295 decl.SetColumn(form_value.Unsigned()); 296 break; 297 case DW_AT_name: 298 299 type_name_cstr = form_value.AsCString(); 300 // Work around a bug in llvm-gcc where they give a name to a 301 // reference type which doesn't 302 // include the "&"... 303 if (tag == DW_TAG_reference_type) { 304 if (strchr(type_name_cstr, '&') == NULL) 305 type_name_cstr = NULL; 306 } 307 if (type_name_cstr) 308 type_name_const_str.SetCString(type_name_cstr); 309 break; 310 case DW_AT_byte_size: 311 byte_size = form_value.Unsigned(); 312 break; 313 case DW_AT_encoding: 314 encoding = form_value.Unsigned(); 315 break; 316 case DW_AT_type: 317 encoding_uid = form_value; 318 break; 319 default: 320 case DW_AT_sibling: 321 break; 322 } 323 } 324 } 325 } 326 327 if (tag == DW_TAG_typedef && encoding_uid.IsValid()) { 328 // Try to parse a typedef from the DWO file first as modules 329 // can contain typedef'ed structures that have no names like: 330 // 331 // typedef struct { int a; } Foo; 332 // 333 // In this case we will have a structure with no name and a 334 // typedef named "Foo" that points to this unnamed structure. 335 // The name in the typedef is the only identifier for the struct, 336 // so always try to get typedefs from DWO files if possible. 337 // 338 // The type_sp returned will be empty if the typedef doesn't exist 339 // in a DWO file, so it is cheap to call this function just to check. 340 // 341 // If we don't do this we end up creating a TypeSP that says this 342 // is a typedef to type 0x123 (the DW_AT_type value would be 0x123 343 // in the DW_TAG_typedef), and this is the unnamed structure type. 344 // We will have a hard time tracking down an unnammed structure 345 // type in the module DWO file, so we make sure we don't get into 346 // this situation by always resolving typedefs from the DWO file. 347 const DWARFDIE encoding_die = dwarf->GetDIE(DIERef(encoding_uid)); 348 349 // First make sure that the die that this is typedef'ed to _is_ 350 // just a declaration (DW_AT_declaration == 1), not a full definition 351 // since template types can't be represented in modules since only 352 // concrete instances of templates are ever emitted and modules 353 // won't contain those 354 if (encoding_die && 355 encoding_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 356 1) { 357 type_sp = ParseTypeFromDWO(die, log); 358 if (type_sp) 359 return type_sp; 360 } 361 } 362 363 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\") type => 0x%8.8lx\n", 364 die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr, 365 encoding_uid.Reference()); 366 367 switch (tag) { 368 default: 369 break; 370 371 case DW_TAG_unspecified_type: 372 if (strcmp(type_name_cstr, "nullptr_t") == 0 || 373 strcmp(type_name_cstr, "decltype(nullptr)") == 0) { 374 resolve_state = Type::eResolveStateFull; 375 clang_type = m_ast.GetBasicType(eBasicTypeNullPtr); 376 break; 377 } 378 // Fall through to base type below in case we can handle the type 379 // there... 380 LLVM_FALLTHROUGH; 381 382 case DW_TAG_base_type: 383 resolve_state = Type::eResolveStateFull; 384 clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize( 385 type_name_cstr, encoding, byte_size * 8); 386 break; 387 388 case DW_TAG_pointer_type: 389 encoding_data_type = Type::eEncodingIsPointerUID; 390 break; 391 case DW_TAG_reference_type: 392 encoding_data_type = Type::eEncodingIsLValueReferenceUID; 393 break; 394 case DW_TAG_rvalue_reference_type: 395 encoding_data_type = Type::eEncodingIsRValueReferenceUID; 396 break; 397 case DW_TAG_typedef: 398 encoding_data_type = Type::eEncodingIsTypedefUID; 399 break; 400 case DW_TAG_const_type: 401 encoding_data_type = Type::eEncodingIsConstUID; 402 break; 403 case DW_TAG_restrict_type: 404 encoding_data_type = Type::eEncodingIsRestrictUID; 405 break; 406 case DW_TAG_volatile_type: 407 encoding_data_type = Type::eEncodingIsVolatileUID; 408 break; 409 } 410 411 if (!clang_type && 412 (encoding_data_type == Type::eEncodingIsPointerUID || 413 encoding_data_type == Type::eEncodingIsTypedefUID) && 414 sc.comp_unit != NULL) { 415 if (tag == DW_TAG_pointer_type) { 416 DWARFDIE target_die = die.GetReferencedDIE(DW_AT_type); 417 418 if (target_die.GetAttributeValueAsUnsigned(DW_AT_APPLE_block, 0)) { 419 // Blocks have a __FuncPtr inside them which is a pointer to a 420 // function of the proper type. 421 422 for (DWARFDIE child_die = target_die.GetFirstChild(); 423 child_die.IsValid(); child_die = child_die.GetSibling()) { 424 if (!strcmp(child_die.GetAttributeValueAsString(DW_AT_name, ""), 425 "__FuncPtr")) { 426 DWARFDIE function_pointer_type = 427 child_die.GetReferencedDIE(DW_AT_type); 428 429 if (function_pointer_type) { 430 DWARFDIE function_type = 431 function_pointer_type.GetReferencedDIE(DW_AT_type); 432 433 bool function_type_is_new_pointer; 434 TypeSP lldb_function_type_sp = ParseTypeFromDWARF( 435 sc, function_type, log, &function_type_is_new_pointer); 436 437 if (lldb_function_type_sp) { 438 clang_type = m_ast.CreateBlockPointerType( 439 lldb_function_type_sp->GetForwardCompilerType()); 440 encoding_data_type = Type::eEncodingIsUID; 441 encoding_uid.Clear(); 442 resolve_state = Type::eResolveStateFull; 443 } 444 } 445 446 break; 447 } 448 } 449 } 450 } 451 452 bool translation_unit_is_objc = 453 (sc.comp_unit->GetLanguage() == eLanguageTypeObjC || 454 sc.comp_unit->GetLanguage() == eLanguageTypeObjC_plus_plus); 455 456 if (translation_unit_is_objc) { 457 if (type_name_cstr != NULL) { 458 static ConstString g_objc_type_name_id("id"); 459 static ConstString g_objc_type_name_Class("Class"); 460 static ConstString g_objc_type_name_selector("SEL"); 461 462 if (type_name_const_str == g_objc_type_name_id) { 463 if (log) 464 dwarf->GetObjectFile()->GetModule()->LogMessage( 465 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 466 "is Objective C 'id' built-in type.", 467 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 468 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 469 encoding_data_type = Type::eEncodingIsUID; 470 encoding_uid.Clear(); 471 resolve_state = Type::eResolveStateFull; 472 473 } else if (type_name_const_str == g_objc_type_name_Class) { 474 if (log) 475 dwarf->GetObjectFile()->GetModule()->LogMessage( 476 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 477 "is Objective C 'Class' built-in type.", 478 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 479 clang_type = m_ast.GetBasicType(eBasicTypeObjCClass); 480 encoding_data_type = Type::eEncodingIsUID; 481 encoding_uid.Clear(); 482 resolve_state = Type::eResolveStateFull; 483 } else if (type_name_const_str == g_objc_type_name_selector) { 484 if (log) 485 dwarf->GetObjectFile()->GetModule()->LogMessage( 486 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 487 "is Objective C 'selector' built-in type.", 488 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 489 clang_type = m_ast.GetBasicType(eBasicTypeObjCSel); 490 encoding_data_type = Type::eEncodingIsUID; 491 encoding_uid.Clear(); 492 resolve_state = Type::eResolveStateFull; 493 } 494 } else if (encoding_data_type == Type::eEncodingIsPointerUID && 495 encoding_uid.IsValid()) { 496 // Clang sometimes erroneously emits id as objc_object*. In that 497 // case we fix up the type to "id". 498 499 const DWARFDIE encoding_die = dwarf->GetDIE(DIERef(encoding_uid)); 500 501 if (encoding_die && encoding_die.Tag() == DW_TAG_structure_type) { 502 if (const char *struct_name = encoding_die.GetName()) { 503 if (!strcmp(struct_name, "objc_object")) { 504 if (log) 505 dwarf->GetObjectFile()->GetModule()->LogMessage( 506 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s " 507 "'%s' is 'objc_object*', which we overrode to " 508 "'id'.", 509 die.GetOffset(), die.GetTagAsCString(), 510 die.GetName()); 511 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 512 encoding_data_type = Type::eEncodingIsUID; 513 encoding_uid.Clear(); 514 resolve_state = Type::eResolveStateFull; 515 } 516 } 517 } 518 } 519 } 520 } 521 522 type_sp.reset( 523 new Type(die.GetID(), dwarf, type_name_const_str, byte_size, NULL, 524 DIERef(encoding_uid).GetUID(dwarf), encoding_data_type, 525 &decl, clang_type, resolve_state)); 526 527 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 528 529 // Type* encoding_type = 530 // GetUniquedTypeForDIEOffset(encoding_uid, type_sp, 531 // NULL, 0, 0, false); 532 // if (encoding_type != NULL) 533 // { 534 // if (encoding_type != DIE_IS_BEING_PARSED) 535 // type_sp->SetEncodingType(encoding_type); 536 // else 537 // m_indirect_fixups.push_back(type_sp.get()); 538 // } 539 } break; 540 541 case DW_TAG_structure_type: 542 case DW_TAG_union_type: 543 case DW_TAG_class_type: { 544 // Set a bit that lets us know that we are currently parsing this 545 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 546 bool byte_size_valid = false; 547 548 LanguageType class_language = eLanguageTypeUnknown; 549 bool is_complete_objc_class = false; 550 // bool struct_is_class = false; 551 const size_t num_attributes = die.GetAttributes(attributes); 552 if (num_attributes > 0) { 553 uint32_t i; 554 for (i = 0; i < num_attributes; ++i) { 555 attr = attributes.AttributeAtIndex(i); 556 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 557 switch (attr) { 558 case DW_AT_decl_file: 559 if (die.GetCU()->DW_AT_decl_file_attributes_are_invalid()) { 560 // llvm-gcc outputs invalid DW_AT_decl_file attributes that 561 // always 562 // point to the compile unit file, so we clear this invalid 563 // value 564 // so that we can still unique types efficiently. 565 decl.SetFile(FileSpec("<invalid>", false)); 566 } else 567 decl.SetFile( 568 sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 569 form_value.Unsigned())); 570 break; 571 572 case DW_AT_decl_line: 573 decl.SetLine(form_value.Unsigned()); 574 break; 575 576 case DW_AT_decl_column: 577 decl.SetColumn(form_value.Unsigned()); 578 break; 579 580 case DW_AT_name: 581 type_name_cstr = form_value.AsCString(); 582 type_name_const_str.SetCString(type_name_cstr); 583 break; 584 585 case DW_AT_byte_size: 586 byte_size = form_value.Unsigned(); 587 byte_size_valid = true; 588 break; 589 590 case DW_AT_accessibility: 591 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 592 break; 593 594 case DW_AT_declaration: 595 is_forward_declaration = form_value.Boolean(); 596 break; 597 598 case DW_AT_APPLE_runtime_class: 599 class_language = (LanguageType)form_value.Signed(); 600 break; 601 602 case DW_AT_APPLE_objc_complete_type: 603 is_complete_objc_class = form_value.Signed(); 604 break; 605 606 case DW_AT_allocated: 607 case DW_AT_associated: 608 case DW_AT_data_location: 609 case DW_AT_description: 610 case DW_AT_start_scope: 611 case DW_AT_visibility: 612 default: 613 case DW_AT_sibling: 614 break; 615 } 616 } 617 } 618 } 619 620 // UniqueDWARFASTType is large, so don't create a local variables on the 621 // stack, put it on the heap. This function is often called recursively 622 // and clang isn't good and sharing the stack space for variables in 623 // different blocks. 624 std::unique_ptr<UniqueDWARFASTType> unique_ast_entry_ap( 625 new UniqueDWARFASTType()); 626 627 ConstString unique_typename(type_name_const_str); 628 Declaration unique_decl(decl); 629 630 if (type_name_const_str) { 631 LanguageType die_language = die.GetLanguage(); 632 if (Language::LanguageIsCPlusPlus(die_language)) { 633 // For C++, we rely solely upon the one definition rule that says 634 // only 635 // one thing can exist at a given decl context. We ignore the file 636 // and 637 // line that things are declared on. 638 std::string qualified_name; 639 if (die.GetQualifiedName(qualified_name)) 640 unique_typename = ConstString(qualified_name); 641 unique_decl.Clear(); 642 } 643 644 if (dwarf->GetUniqueDWARFASTTypeMap().Find( 645 unique_typename, die, unique_decl, 646 byte_size_valid ? byte_size : -1, *unique_ast_entry_ap)) { 647 type_sp = unique_ast_entry_ap->m_type_sp; 648 if (type_sp) { 649 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 650 return type_sp; 651 } 652 } 653 } 654 655 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 656 DW_TAG_value_to_name(tag), type_name_cstr); 657 658 int tag_decl_kind = -1; 659 AccessType default_accessibility = eAccessNone; 660 if (tag == DW_TAG_structure_type) { 661 tag_decl_kind = clang::TTK_Struct; 662 default_accessibility = eAccessPublic; 663 } else if (tag == DW_TAG_union_type) { 664 tag_decl_kind = clang::TTK_Union; 665 default_accessibility = eAccessPublic; 666 } else if (tag == DW_TAG_class_type) { 667 tag_decl_kind = clang::TTK_Class; 668 default_accessibility = eAccessPrivate; 669 } 670 671 if (byte_size_valid && byte_size == 0 && type_name_cstr && 672 die.HasChildren() == false && 673 sc.comp_unit->GetLanguage() == eLanguageTypeObjC) { 674 // Work around an issue with clang at the moment where 675 // forward declarations for objective C classes are emitted 676 // as: 677 // DW_TAG_structure_type [2] 678 // DW_AT_name( "ForwardObjcClass" ) 679 // DW_AT_byte_size( 0x00 ) 680 // DW_AT_decl_file( "..." ) 681 // DW_AT_decl_line( 1 ) 682 // 683 // Note that there is no DW_AT_declaration and there are 684 // no children, and the byte size is zero. 685 is_forward_declaration = true; 686 } 687 688 if (class_language == eLanguageTypeObjC || 689 class_language == eLanguageTypeObjC_plus_plus) { 690 if (!is_complete_objc_class && 691 die.Supports_DW_AT_APPLE_objc_complete_type()) { 692 // We have a valid eSymbolTypeObjCClass class symbol whose 693 // name matches the current objective C class that we 694 // are trying to find and this DIE isn't the complete 695 // definition (we checked is_complete_objc_class above and 696 // know it is false), so the real definition is in here somewhere 697 type_sp = dwarf->FindCompleteObjCDefinitionTypeForDIE( 698 die, type_name_const_str, true); 699 700 if (!type_sp) { 701 SymbolFileDWARFDebugMap *debug_map_symfile = 702 dwarf->GetDebugMapSymfile(); 703 if (debug_map_symfile) { 704 // We weren't able to find a full declaration in 705 // this DWARF, see if we have a declaration anywhere 706 // else... 707 type_sp = 708 debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE( 709 die, type_name_const_str, true); 710 } 711 } 712 713 if (type_sp) { 714 if (log) { 715 dwarf->GetObjectFile()->GetModule()->LogMessage( 716 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is an " 717 "incomplete objc type, complete type is 0x%8.8" PRIx64, 718 static_cast<void *>(this), die.GetOffset(), 719 DW_TAG_value_to_name(tag), type_name_cstr, 720 type_sp->GetID()); 721 } 722 723 // We found a real definition for this type elsewhere 724 // so lets use it and cache the fact that we found 725 // a complete type for this die 726 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 727 return type_sp; 728 } 729 } 730 } 731 732 if (is_forward_declaration) { 733 // We have a forward declaration to a type and we need 734 // to try and find a full declaration. We look in the 735 // current type index just in case we have a forward 736 // declaration followed by an actual declarations in the 737 // DWARF. If this fails, we need to look elsewhere... 738 if (log) { 739 dwarf->GetObjectFile()->GetModule()->LogMessage( 740 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 741 "forward declaration, trying to find complete type", 742 static_cast<void *>(this), die.GetOffset(), 743 DW_TAG_value_to_name(tag), type_name_cstr); 744 } 745 746 // See if the type comes from a DWO module and if so, track down that 747 // type. 748 type_sp = ParseTypeFromDWO(die, log); 749 if (type_sp) 750 return type_sp; 751 752 DWARFDeclContext die_decl_ctx; 753 die.GetDWARFDeclContext(die_decl_ctx); 754 755 // type_sp = FindDefinitionTypeForDIE (dwarf_cu, die, 756 // type_name_const_str); 757 type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx); 758 759 if (!type_sp) { 760 SymbolFileDWARFDebugMap *debug_map_symfile = 761 dwarf->GetDebugMapSymfile(); 762 if (debug_map_symfile) { 763 // We weren't able to find a full declaration in 764 // this DWARF, see if we have a declaration anywhere 765 // else... 766 type_sp = 767 debug_map_symfile->FindDefinitionTypeForDWARFDeclContext( 768 die_decl_ctx); 769 } 770 } 771 772 if (type_sp) { 773 if (log) { 774 dwarf->GetObjectFile()->GetModule()->LogMessage( 775 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 776 "forward declaration, complete type is 0x%8.8" PRIx64, 777 static_cast<void *>(this), die.GetOffset(), 778 DW_TAG_value_to_name(tag), type_name_cstr, type_sp->GetID()); 779 } 780 781 // We found a real definition for this type elsewhere 782 // so lets use it and cache the fact that we found 783 // a complete type for this die 784 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 785 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE( 786 dwarf->DebugInfo()->GetDIE(DIERef(type_sp->GetID(), dwarf))); 787 if (defn_decl_ctx) 788 LinkDeclContextToDIE(defn_decl_ctx, die); 789 return type_sp; 790 } 791 } 792 assert(tag_decl_kind != -1); 793 bool clang_type_was_created = false; 794 clang_type.SetCompilerType( 795 &m_ast, dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE())); 796 if (!clang_type) { 797 clang::DeclContext *decl_ctx = 798 GetClangDeclContextContainingDIE(die, nullptr); 799 if (accessibility == eAccessNone && decl_ctx) { 800 // Check the decl context that contains this class/struct/union. 801 // If it is a class we must give it an accessibility. 802 const clang::Decl::Kind containing_decl_kind = 803 decl_ctx->getDeclKind(); 804 if (DeclKindIsCXXClass(containing_decl_kind)) 805 accessibility = default_accessibility; 806 } 807 808 ClangASTMetadata metadata; 809 metadata.SetUserID(die.GetID()); 810 metadata.SetIsDynamicCXXType(dwarf->ClassOrStructIsVirtual(die)); 811 812 if (type_name_cstr && strchr(type_name_cstr, '<')) { 813 ClangASTContext::TemplateParameterInfos template_param_infos; 814 if (ParseTemplateParameterInfos(die, template_param_infos)) { 815 clang::ClassTemplateDecl *class_template_decl = 816 m_ast.ParseClassTemplateDecl(decl_ctx, accessibility, 817 type_name_cstr, tag_decl_kind, 818 template_param_infos); 819 if (!class_template_decl) { 820 if (log) { 821 dwarf->GetObjectFile()->GetModule()->LogMessage( 822 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" " 823 "clang::ClassTemplateDecl failed to return a decl.", 824 static_cast<void *>(this), die.GetOffset(), 825 DW_TAG_value_to_name(tag), type_name_cstr); 826 } 827 return TypeSP(); 828 } 829 830 clang::ClassTemplateSpecializationDecl 831 *class_specialization_decl = 832 m_ast.CreateClassTemplateSpecializationDecl( 833 decl_ctx, class_template_decl, tag_decl_kind, 834 template_param_infos); 835 clang_type = m_ast.CreateClassTemplateSpecializationType( 836 class_specialization_decl); 837 clang_type_was_created = true; 838 839 m_ast.SetMetadata(class_template_decl, metadata); 840 m_ast.SetMetadata(class_specialization_decl, metadata); 841 } 842 } 843 844 if (!clang_type_was_created) { 845 clang_type_was_created = true; 846 clang_type = m_ast.CreateRecordType(decl_ctx, accessibility, 847 type_name_cstr, tag_decl_kind, 848 class_language, &metadata); 849 } 850 } 851 852 // Store a forward declaration to this class type in case any 853 // parameters in any class methods need it for the clang 854 // types for function prototypes. 855 LinkDeclContextToDIE(m_ast.GetDeclContextForType(clang_type), die); 856 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, 857 byte_size, NULL, LLDB_INVALID_UID, 858 Type::eEncodingIsUID, &decl, clang_type, 859 Type::eResolveStateForward)); 860 861 type_sp->SetIsCompleteObjCClass(is_complete_objc_class); 862 863 // Add our type to the unique type map so we don't 864 // end up creating many copies of the same type over 865 // and over in the ASTContext for our module 866 unique_ast_entry_ap->m_type_sp = type_sp; 867 unique_ast_entry_ap->m_die = die; 868 unique_ast_entry_ap->m_declaration = unique_decl; 869 unique_ast_entry_ap->m_byte_size = byte_size; 870 dwarf->GetUniqueDWARFASTTypeMap().Insert(unique_typename, 871 *unique_ast_entry_ap); 872 873 if (is_forward_declaration && die.HasChildren()) { 874 // Check to see if the DIE actually has a definition, some version of 875 // GCC will 876 // emit DIEs with DW_AT_declaration set to true, but yet still have 877 // subprogram, 878 // members, or inheritance, so we can't trust it 879 DWARFDIE child_die = die.GetFirstChild(); 880 while (child_die) { 881 switch (child_die.Tag()) { 882 case DW_TAG_inheritance: 883 case DW_TAG_subprogram: 884 case DW_TAG_member: 885 case DW_TAG_APPLE_property: 886 case DW_TAG_class_type: 887 case DW_TAG_structure_type: 888 case DW_TAG_enumeration_type: 889 case DW_TAG_typedef: 890 case DW_TAG_union_type: 891 child_die.Clear(); 892 is_forward_declaration = false; 893 break; 894 default: 895 child_die = child_die.GetSibling(); 896 break; 897 } 898 } 899 } 900 901 if (!is_forward_declaration) { 902 // Always start the definition for a class type so that 903 // if the class has child classes or types that require 904 // the class to be created for use as their decl contexts 905 // the class will be ready to accept these child definitions. 906 if (die.HasChildren() == false) { 907 // No children for this struct/union/class, lets finish it 908 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 909 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 910 } else { 911 dwarf->GetObjectFile()->GetModule()->ReportError( 912 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 913 "definition.\nPlease file a bug and attach the file at the " 914 "start of this error message", 915 die.GetOffset(), type_name_cstr); 916 } 917 918 if (tag == DW_TAG_structure_type) // this only applies in C 919 { 920 clang::RecordDecl *record_decl = 921 ClangASTContext::GetAsRecordDecl(clang_type); 922 923 if (record_decl) { 924 GetClangASTImporter().InsertRecordDecl( 925 record_decl, ClangASTImporter::LayoutInfo()); 926 } 927 } 928 } else if (clang_type_was_created) { 929 // Start the definition if the class is not objective C since 930 // the underlying decls respond to isCompleteDefinition(). Objective 931 // C decls don't respond to isCompleteDefinition() so we can't 932 // start the declaration definition right away. For C++ 933 // class/union/structs 934 // we want to start the definition in case the class is needed as 935 // the 936 // declaration context for a contained class or type without the 937 // need 938 // to complete that type.. 939 940 if (class_language != eLanguageTypeObjC && 941 class_language != eLanguageTypeObjC_plus_plus) 942 ClangASTContext::StartTagDeclarationDefinition(clang_type); 943 944 // Leave this as a forward declaration until we need 945 // to know the details of the type. lldb_private::Type 946 // will automatically call the SymbolFile virtual function 947 // "SymbolFileDWARF::CompleteType(Type *)" 948 // When the definition needs to be defined. 949 assert(!dwarf->GetForwardDeclClangTypeToDie().count( 950 ClangUtil::RemoveFastQualifiers(clang_type) 951 .GetOpaqueQualType()) && 952 "Type already in the forward declaration map!"); 953 // Can't assume m_ast.GetSymbolFile() is actually a SymbolFileDWARF, 954 // it can be a 955 // SymbolFileDWARFDebugMap for Apple binaries. 956 dwarf->GetForwardDeclDieToClangType()[die.GetDIE()] = 957 clang_type.GetOpaqueQualType(); 958 dwarf->GetForwardDeclClangTypeToDie() 959 [ClangUtil::RemoveFastQualifiers(clang_type) 960 .GetOpaqueQualType()] = die.GetDIERef(); 961 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), true); 962 } 963 } 964 } break; 965 966 case DW_TAG_enumeration_type: { 967 // Set a bit that lets us know that we are currently parsing this 968 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 969 970 bool is_scoped = false; 971 DWARFFormValue encoding_form; 972 973 const size_t num_attributes = die.GetAttributes(attributes); 974 if (num_attributes > 0) { 975 uint32_t i; 976 977 for (i = 0; i < num_attributes; ++i) { 978 attr = attributes.AttributeAtIndex(i); 979 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 980 switch (attr) { 981 case DW_AT_decl_file: 982 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 983 form_value.Unsigned())); 984 break; 985 case DW_AT_decl_line: 986 decl.SetLine(form_value.Unsigned()); 987 break; 988 case DW_AT_decl_column: 989 decl.SetColumn(form_value.Unsigned()); 990 break; 991 case DW_AT_name: 992 type_name_cstr = form_value.AsCString(); 993 type_name_const_str.SetCString(type_name_cstr); 994 break; 995 case DW_AT_type: 996 encoding_form = form_value; 997 break; 998 case DW_AT_byte_size: 999 byte_size = form_value.Unsigned(); 1000 break; 1001 case DW_AT_accessibility: 1002 break; // accessibility = 1003 // DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 1004 case DW_AT_declaration: 1005 is_forward_declaration = form_value.Boolean(); 1006 break; 1007 case DW_AT_enum_class: 1008 is_scoped = form_value.Boolean(); 1009 break; 1010 case DW_AT_allocated: 1011 case DW_AT_associated: 1012 case DW_AT_bit_stride: 1013 case DW_AT_byte_stride: 1014 case DW_AT_data_location: 1015 case DW_AT_description: 1016 case DW_AT_start_scope: 1017 case DW_AT_visibility: 1018 case DW_AT_specification: 1019 case DW_AT_abstract_origin: 1020 case DW_AT_sibling: 1021 break; 1022 } 1023 } 1024 } 1025 1026 if (is_forward_declaration) { 1027 type_sp = ParseTypeFromDWO(die, log); 1028 if (type_sp) 1029 return type_sp; 1030 1031 DWARFDeclContext die_decl_ctx; 1032 die.GetDWARFDeclContext(die_decl_ctx); 1033 1034 type_sp = 1035 dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx); 1036 1037 if (!type_sp) { 1038 SymbolFileDWARFDebugMap *debug_map_symfile = 1039 dwarf->GetDebugMapSymfile(); 1040 if (debug_map_symfile) { 1041 // We weren't able to find a full declaration in 1042 // this DWARF, see if we have a declaration anywhere 1043 // else... 1044 type_sp = 1045 debug_map_symfile->FindDefinitionTypeForDWARFDeclContext( 1046 die_decl_ctx); 1047 } 1048 } 1049 1050 if (type_sp) { 1051 if (log) { 1052 dwarf->GetObjectFile()->GetModule()->LogMessage( 1053 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 1054 "forward declaration, complete type is 0x%8.8" PRIx64, 1055 static_cast<void *>(this), die.GetOffset(), 1056 DW_TAG_value_to_name(tag), type_name_cstr, 1057 type_sp->GetID()); 1058 } 1059 1060 // We found a real definition for this type elsewhere 1061 // so lets use it and cache the fact that we found 1062 // a complete type for this die 1063 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1064 clang::DeclContext *defn_decl_ctx = 1065 GetCachedClangDeclContextForDIE(dwarf->DebugInfo()->GetDIE( 1066 DIERef(type_sp->GetID(), dwarf))); 1067 if (defn_decl_ctx) 1068 LinkDeclContextToDIE(defn_decl_ctx, die); 1069 return type_sp; 1070 } 1071 } 1072 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1073 DW_TAG_value_to_name(tag), type_name_cstr); 1074 1075 CompilerType enumerator_clang_type; 1076 clang_type.SetCompilerType( 1077 &m_ast, 1078 dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE())); 1079 if (!clang_type) { 1080 if (encoding_form.IsValid()) { 1081 Type *enumerator_type = 1082 dwarf->ResolveTypeUID(DIERef(encoding_form)); 1083 if (enumerator_type) 1084 enumerator_clang_type = enumerator_type->GetFullCompilerType(); 1085 } 1086 1087 if (!enumerator_clang_type) { 1088 if (byte_size > 0) { 1089 enumerator_clang_type = 1090 m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize( 1091 NULL, DW_ATE_signed, byte_size * 8); 1092 } else { 1093 enumerator_clang_type = m_ast.GetBasicType(eBasicTypeInt); 1094 } 1095 } 1096 1097 clang_type = m_ast.CreateEnumerationType( 1098 type_name_cstr, GetClangDeclContextContainingDIE(die, nullptr), 1099 decl, enumerator_clang_type, is_scoped); 1100 } else { 1101 enumerator_clang_type = 1102 m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType()); 1103 } 1104 1105 LinkDeclContextToDIE( 1106 ClangASTContext::GetDeclContextForType(clang_type), die); 1107 1108 type_sp.reset(new Type( 1109 die.GetID(), dwarf, type_name_const_str, byte_size, NULL, 1110 DIERef(encoding_form).GetUID(dwarf), Type::eEncodingIsUID, &decl, 1111 clang_type, Type::eResolveStateForward)); 1112 1113 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 1114 if (die.HasChildren()) { 1115 SymbolContext cu_sc(die.GetLLDBCompileUnit()); 1116 bool is_signed = false; 1117 enumerator_clang_type.IsIntegerType(is_signed); 1118 ParseChildEnumerators(cu_sc, clang_type, is_signed, 1119 type_sp->GetByteSize(), die); 1120 } 1121 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 1122 } else { 1123 dwarf->GetObjectFile()->GetModule()->ReportError( 1124 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 1125 "definition.\nPlease file a bug and attach the file at the " 1126 "start of this error message", 1127 die.GetOffset(), type_name_cstr); 1128 } 1129 } 1130 } break; 1131 1132 case DW_TAG_inlined_subroutine: 1133 case DW_TAG_subprogram: 1134 case DW_TAG_subroutine_type: { 1135 // Set a bit that lets us know that we are currently parsing this 1136 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1137 1138 DWARFFormValue type_die_form; 1139 bool is_variadic = false; 1140 bool is_inline = false; 1141 bool is_static = false; 1142 bool is_virtual = false; 1143 bool is_explicit = false; 1144 bool is_artificial = false; 1145 bool has_template_params = false; 1146 DWARFFormValue specification_die_form; 1147 DWARFFormValue abstract_origin_die_form; 1148 dw_offset_t object_pointer_die_offset = DW_INVALID_OFFSET; 1149 1150 unsigned type_quals = 0; 1151 clang::StorageClass storage = 1152 clang::SC_None; //, Extern, Static, PrivateExtern 1153 1154 const size_t num_attributes = die.GetAttributes(attributes); 1155 if (num_attributes > 0) { 1156 uint32_t i; 1157 for (i = 0; i < num_attributes; ++i) { 1158 attr = attributes.AttributeAtIndex(i); 1159 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1160 switch (attr) { 1161 case DW_AT_decl_file: 1162 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 1163 form_value.Unsigned())); 1164 break; 1165 case DW_AT_decl_line: 1166 decl.SetLine(form_value.Unsigned()); 1167 break; 1168 case DW_AT_decl_column: 1169 decl.SetColumn(form_value.Unsigned()); 1170 break; 1171 case DW_AT_name: 1172 type_name_cstr = form_value.AsCString(); 1173 type_name_const_str.SetCString(type_name_cstr); 1174 break; 1175 1176 case DW_AT_linkage_name: 1177 case DW_AT_MIPS_linkage_name: 1178 break; // mangled = 1179 // form_value.AsCString(&dwarf->get_debug_str_data()); 1180 // break; 1181 case DW_AT_type: 1182 type_die_form = form_value; 1183 break; 1184 case DW_AT_accessibility: 1185 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 1186 break; 1187 case DW_AT_declaration: 1188 break; // is_forward_declaration = form_value.Boolean(); break; 1189 case DW_AT_inline: 1190 is_inline = form_value.Boolean(); 1191 break; 1192 case DW_AT_virtuality: 1193 is_virtual = form_value.Boolean(); 1194 break; 1195 case DW_AT_explicit: 1196 is_explicit = form_value.Boolean(); 1197 break; 1198 case DW_AT_artificial: 1199 is_artificial = form_value.Boolean(); 1200 break; 1201 1202 case DW_AT_external: 1203 if (form_value.Unsigned()) { 1204 if (storage == clang::SC_None) 1205 storage = clang::SC_Extern; 1206 else 1207 storage = clang::SC_PrivateExtern; 1208 } 1209 break; 1210 1211 case DW_AT_specification: 1212 specification_die_form = form_value; 1213 break; 1214 1215 case DW_AT_abstract_origin: 1216 abstract_origin_die_form = form_value; 1217 break; 1218 1219 case DW_AT_object_pointer: 1220 object_pointer_die_offset = form_value.Reference(); 1221 break; 1222 1223 case DW_AT_allocated: 1224 case DW_AT_associated: 1225 case DW_AT_address_class: 1226 case DW_AT_calling_convention: 1227 case DW_AT_data_location: 1228 case DW_AT_elemental: 1229 case DW_AT_entry_pc: 1230 case DW_AT_frame_base: 1231 case DW_AT_high_pc: 1232 case DW_AT_low_pc: 1233 case DW_AT_prototyped: 1234 case DW_AT_pure: 1235 case DW_AT_ranges: 1236 case DW_AT_recursive: 1237 case DW_AT_return_addr: 1238 case DW_AT_segment: 1239 case DW_AT_start_scope: 1240 case DW_AT_static_link: 1241 case DW_AT_trampoline: 1242 case DW_AT_visibility: 1243 case DW_AT_vtable_elem_location: 1244 case DW_AT_description: 1245 case DW_AT_sibling: 1246 break; 1247 } 1248 } 1249 } 1250 } 1251 1252 std::string object_pointer_name; 1253 if (object_pointer_die_offset != DW_INVALID_OFFSET) { 1254 DWARFDIE object_pointer_die = die.GetDIE(object_pointer_die_offset); 1255 if (object_pointer_die) { 1256 const char *object_pointer_name_cstr = object_pointer_die.GetName(); 1257 if (object_pointer_name_cstr) 1258 object_pointer_name = object_pointer_name_cstr; 1259 } 1260 } 1261 1262 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1263 DW_TAG_value_to_name(tag), type_name_cstr); 1264 1265 CompilerType return_clang_type; 1266 Type *func_type = NULL; 1267 1268 if (type_die_form.IsValid()) 1269 func_type = dwarf->ResolveTypeUID(DIERef(type_die_form)); 1270 1271 if (func_type) 1272 return_clang_type = func_type->GetForwardCompilerType(); 1273 else 1274 return_clang_type = m_ast.GetBasicType(eBasicTypeVoid); 1275 1276 std::vector<CompilerType> function_param_types; 1277 std::vector<clang::ParmVarDecl *> function_param_decls; 1278 1279 // Parse the function children for the parameters 1280 1281 DWARFDIE decl_ctx_die; 1282 clang::DeclContext *containing_decl_ctx = 1283 GetClangDeclContextContainingDIE(die, &decl_ctx_die); 1284 const clang::Decl::Kind containing_decl_kind = 1285 containing_decl_ctx->getDeclKind(); 1286 1287 bool is_cxx_method = DeclKindIsCXXClass(containing_decl_kind); 1288 // Start off static. This will be set to false in 1289 // ParseChildParameters(...) 1290 // if we find a "this" parameters as the first parameter 1291 if (is_cxx_method) { 1292 is_static = true; 1293 } 1294 1295 if (die.HasChildren()) { 1296 bool skip_artificial = true; 1297 ParseChildParameters(sc, containing_decl_ctx, die, skip_artificial, 1298 is_static, is_variadic, has_template_params, 1299 function_param_types, function_param_decls, 1300 type_quals); 1301 } 1302 1303 bool ignore_containing_context = false; 1304 // Check for templatized class member functions. If we had any 1305 // DW_TAG_template_type_parameter 1306 // or DW_TAG_template_value_parameter the DW_TAG_subprogram DIE, then we 1307 // can't let this become 1308 // a method in a class. Why? Because templatized functions are only 1309 // emitted if one of the 1310 // templatized methods is used in the current compile unit and we will 1311 // end up with classes 1312 // that may or may not include these member functions and this means one 1313 // class won't match another 1314 // class definition and it affects our ability to use a class in the 1315 // clang expression parser. So 1316 // for the greater good, we currently must not allow any template member 1317 // 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 call 1324 clang_type = m_ast.CreateFunctionType( 1325 return_clang_type, function_param_types.data(), 1326 function_param_types.size(), is_variadic, type_quals); 1327 1328 if (type_name_cstr) { 1329 bool type_handled = false; 1330 if (tag == DW_TAG_subprogram || tag == DW_TAG_inlined_subroutine) { 1331 ObjCLanguage::MethodName objc_method(type_name_cstr, true); 1332 if (objc_method.IsValid(true)) { 1333 CompilerType class_opaque_type; 1334 ConstString class_name(objc_method.GetClassName()); 1335 if (class_name) { 1336 TypeSP complete_objc_class_type_sp( 1337 dwarf->FindCompleteObjCDefinitionTypeForDIE( 1338 DWARFDIE(), class_name, false)); 1339 1340 if (complete_objc_class_type_sp) { 1341 CompilerType type_clang_forward_type = 1342 complete_objc_class_type_sp->GetForwardCompilerType(); 1343 if (ClangASTContext::IsObjCObjectOrInterfaceType( 1344 type_clang_forward_type)) 1345 class_opaque_type = type_clang_forward_type; 1346 } 1347 } 1348 1349 if (class_opaque_type) { 1350 // If accessibility isn't set to anything valid, assume public 1351 // for 1352 // 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 1375 // a class or struct and see if this is actually a 1376 // C++ method 1377 Type *class_type = dwarf->ResolveType(decl_ctx_die); 1378 if (class_type) { 1379 bool alternate_defn = false; 1380 if (class_type->GetID() != decl_ctx_die.GetID() || 1381 decl_ctx_die.GetContainingDWOModuleDIE()) { 1382 alternate_defn = true; 1383 1384 // We uniqued the parent class of this function to another 1385 // class 1386 // so we now need to associate all dies under "decl_ctx_die" 1387 // to 1388 // DIEs in the DIE for "class_type"... 1389 SymbolFileDWARF *class_symfile = NULL; 1390 DWARFDIE class_type_die; 1391 1392 SymbolFileDWARFDebugMap *debug_map_symfile = 1393 dwarf->GetDebugMapSymfile(); 1394 if (debug_map_symfile) { 1395 class_symfile = debug_map_symfile->GetSymbolFileByOSOIndex( 1396 SymbolFileDWARFDebugMap::GetOSOIndexFromUserID( 1397 class_type->GetID())); 1398 class_type_die = class_symfile->DebugInfo()->GetDIE( 1399 DIERef(class_type->GetID(), dwarf)); 1400 } else { 1401 class_symfile = dwarf; 1402 class_type_die = dwarf->DebugInfo()->GetDIE( 1403 DIERef(class_type->GetID(), dwarf)); 1404 } 1405 if (class_type_die) { 1406 DWARFDIECollection failures; 1407 1408 CopyUniqueClassMethodTypes(decl_ctx_die, class_type_die, 1409 class_type, failures); 1410 1411 // FIXME do something with these failures that's smarter 1412 // than 1413 // just dropping them on the ground. Unfortunately classes 1414 // don't 1415 // like having stuff added to them after their definitions 1416 // are 1417 // complete... 1418 1419 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1420 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1421 type_sp = type_ptr->shared_from_this(); 1422 break; 1423 } 1424 } 1425 } 1426 1427 if (specification_die_form.IsValid()) { 1428 // We have a specification which we are going to base our 1429 // function 1430 // prototype off of, so we need this type to be completed so 1431 // that the 1432 // m_die_to_decl_ctx for the method in the specification has a 1433 // valid 1434 // clang decl context. 1435 class_type->GetForwardCompilerType(); 1436 // If we have a specification, then the function type should 1437 // have been 1438 // made with the specification and not with this die. 1439 DWARFDIE spec_die = dwarf->DebugInfo()->GetDIE( 1440 DIERef(specification_die_form)); 1441 clang::DeclContext *spec_clang_decl_ctx = 1442 GetClangDeclContextForDIE(spec_die); 1443 if (spec_clang_decl_ctx) { 1444 LinkDeclContextToDIE(spec_clang_decl_ctx, die); 1445 } else { 1446 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1447 "0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8" PRIx64 1448 ") has no decl\n", 1449 die.GetID(), specification_die_form.Reference()); 1450 } 1451 type_handled = true; 1452 } else if (abstract_origin_die_form.IsValid()) { 1453 // We have a specification which we are going to base our 1454 // function 1455 // prototype off of, so we need this type to be completed so 1456 // that the 1457 // m_die_to_decl_ctx for the method in the abstract origin has 1458 // a valid 1459 // clang decl context. 1460 class_type->GetForwardCompilerType(); 1461 1462 DWARFDIE abs_die = dwarf->DebugInfo()->GetDIE( 1463 DIERef(abstract_origin_die_form)); 1464 clang::DeclContext *abs_clang_decl_ctx = 1465 GetClangDeclContextForDIE(abs_die); 1466 if (abs_clang_decl_ctx) { 1467 LinkDeclContextToDIE(abs_clang_decl_ctx, die); 1468 } else { 1469 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1470 "0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8" PRIx64 1471 ") has no decl\n", 1472 die.GetID(), abstract_origin_die_form.Reference()); 1473 } 1474 type_handled = true; 1475 } else { 1476 CompilerType class_opaque_type = 1477 class_type->GetForwardCompilerType(); 1478 if (ClangASTContext::IsCXXClassType(class_opaque_type)) { 1479 if (class_opaque_type.IsBeingDefined() || alternate_defn) { 1480 if (!is_static && !die.HasChildren()) { 1481 // We have a C++ member function with no children (this 1482 // pointer!) 1483 // and clang will get mad if we try and make a function 1484 // that isn't 1485 // well formed in the DWARF, so we will just skip it... 1486 type_handled = true; 1487 } else { 1488 bool add_method = true; 1489 if (alternate_defn) { 1490 // If an alternate definition for the class exists, 1491 // then add the method only if an 1492 // equivalent is not already present. 1493 clang::CXXRecordDecl *record_decl = 1494 m_ast.GetAsCXXRecordDecl( 1495 class_opaque_type.GetOpaqueQualType()); 1496 if (record_decl) { 1497 for (auto method_iter = record_decl->method_begin(); 1498 method_iter != record_decl->method_end(); 1499 method_iter++) { 1500 clang::CXXMethodDecl *method_decl = *method_iter; 1501 if (method_decl->getNameInfo().getAsString() == 1502 std::string(type_name_cstr)) { 1503 if (method_decl->getType() == 1504 ClangUtil::GetQualType(clang_type)) { 1505 add_method = false; 1506 LinkDeclContextToDIE( 1507 ClangASTContext::GetAsDeclContext( 1508 method_decl), 1509 die); 1510 type_handled = true; 1511 1512 break; 1513 } 1514 } 1515 } 1516 } 1517 } 1518 1519 if (add_method) { 1520 llvm::PrettyStackTraceFormat stack_trace( 1521 "SymbolFileDWARF::ParseType() is adding a method " 1522 "%s to class %s in DIE 0x%8.8" PRIx64 " from %s", 1523 type_name_cstr, 1524 class_type->GetName().GetCString(), die.GetID(), 1525 dwarf->GetObjectFile() 1526 ->GetFileSpec() 1527 .GetPath() 1528 .c_str()); 1529 1530 const bool is_attr_used = false; 1531 // Neither GCC 4.2 nor clang++ currently set a valid 1532 // accessibility 1533 // in the DWARF for C++ methods... Default to public 1534 // for now... 1535 if (accessibility == eAccessNone) 1536 accessibility = eAccessPublic; 1537 1538 clang::CXXMethodDecl *cxx_method_decl = 1539 m_ast.AddMethodToCXXRecordType( 1540 class_opaque_type.GetOpaqueQualType(), 1541 type_name_cstr, clang_type, accessibility, 1542 is_virtual, is_static, is_inline, is_explicit, 1543 is_attr_used, is_artificial); 1544 1545 type_handled = cxx_method_decl != NULL; 1546 1547 if (type_handled) { 1548 LinkDeclContextToDIE( 1549 ClangASTContext::GetAsDeclContext( 1550 cxx_method_decl), 1551 die); 1552 1553 ClangASTMetadata metadata; 1554 metadata.SetUserID(die.GetID()); 1555 1556 if (!object_pointer_name.empty()) { 1557 metadata.SetObjectPtrName( 1558 object_pointer_name.c_str()); 1559 if (log) 1560 log->Printf( 1561 "Setting object pointer name: %s on method " 1562 "object %p.\n", 1563 object_pointer_name.c_str(), 1564 static_cast<void *>(cxx_method_decl)); 1565 } 1566 m_ast.SetMetadata(cxx_method_decl, metadata); 1567 } else { 1568 ignore_containing_context = true; 1569 } 1570 } 1571 } 1572 } else { 1573 // We were asked to parse the type for a method in a 1574 // class, yet the 1575 // class hasn't been asked to complete itself through the 1576 // clang::ExternalASTSource protocol, so we need to just 1577 // have the 1578 // class complete itself and do things the right way, then 1579 // our 1580 // DIE should then have an entry in the 1581 // dwarf->GetDIEToType() map. First 1582 // we need to modify the dwarf->GetDIEToType() so it 1583 // doesn't think we are 1584 // trying to parse this DIE anymore... 1585 dwarf->GetDIEToType()[die.GetDIE()] = NULL; 1586 1587 // Now we get the full type to force our class type to 1588 // complete itself 1589 // using the clang::ExternalASTSource protocol which will 1590 // parse all 1591 // base classes and all methods (including the method for 1592 // this DIE). 1593 class_type->GetFullCompilerType(); 1594 1595 // The type for this DIE should have been filled in the 1596 // function call above 1597 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1598 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1599 type_sp = type_ptr->shared_from_this(); 1600 break; 1601 } 1602 1603 // FIXME This is fixing some even uglier behavior but we 1604 // really need to 1605 // uniq the methods of each class as well as the class 1606 // itself. 1607 // <rdar://problem/11240464> 1608 type_handled = true; 1609 } 1610 } 1611 } 1612 } 1613 } 1614 } 1615 1616 if (!type_handled) { 1617 clang::FunctionDecl *function_decl = nullptr; 1618 1619 if (abstract_origin_die_form.IsValid()) { 1620 DWARFDIE abs_die = 1621 dwarf->DebugInfo()->GetDIE(DIERef(abstract_origin_die_form)); 1622 1623 SymbolContext sc; 1624 1625 if (dwarf->ResolveType(abs_die)) { 1626 function_decl = llvm::dyn_cast_or_null<clang::FunctionDecl>( 1627 GetCachedClangDeclContextForDIE(abs_die)); 1628 1629 if (function_decl) { 1630 LinkDeclContextToDIE(function_decl, die); 1631 } 1632 } 1633 } 1634 1635 if (!function_decl) { 1636 // We just have a function that isn't part of a class 1637 function_decl = m_ast.CreateFunctionDeclaration( 1638 ignore_containing_context ? m_ast.GetTranslationUnitDecl() 1639 : containing_decl_ctx, 1640 type_name_cstr, clang_type, storage, is_inline); 1641 1642 if (has_template_params) { 1643 ClangASTContext::TemplateParameterInfos template_param_infos; 1644 ParseTemplateParameterInfos(die, template_param_infos); 1645 clang::FunctionTemplateDecl *func_template_decl = 1646 m_ast.CreateFunctionTemplateDecl( 1647 containing_decl_ctx, function_decl, type_name_cstr, 1648 template_param_infos); 1649 m_ast.CreateFunctionTemplateSpecializationInfo( 1650 function_decl, func_template_decl, template_param_infos); 1651 } 1652 1653 lldbassert(function_decl); 1654 1655 if (function_decl) { 1656 LinkDeclContextToDIE(function_decl, die); 1657 1658 if (!function_param_decls.empty()) 1659 m_ast.SetFunctionParameters(function_decl, 1660 &function_param_decls.front(), 1661 function_param_decls.size()); 1662 1663 ClangASTMetadata metadata; 1664 metadata.SetUserID(die.GetID()); 1665 1666 if (!object_pointer_name.empty()) { 1667 metadata.SetObjectPtrName(object_pointer_name.c_str()); 1668 if (log) 1669 log->Printf("Setting object pointer name: %s on function " 1670 "object %p.", 1671 object_pointer_name.c_str(), 1672 static_cast<void *>(function_decl)); 1673 } 1674 m_ast.SetMetadata(function_decl, metadata); 1675 } 1676 } 1677 } 1678 } 1679 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, 0, NULL, 1680 LLDB_INVALID_UID, Type::eEncodingIsUID, &decl, 1681 clang_type, Type::eResolveStateFull)); 1682 assert(type_sp.get()); 1683 } break; 1684 1685 case DW_TAG_array_type: { 1686 // Set a bit that lets us know that we are currently parsing this 1687 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1688 1689 DWARFFormValue type_die_form; 1690 int64_t first_index = 0; 1691 uint32_t byte_stride = 0; 1692 uint32_t bit_stride = 0; 1693 bool is_vector = false; 1694 const size_t num_attributes = die.GetAttributes(attributes); 1695 1696 if (num_attributes > 0) { 1697 uint32_t i; 1698 for (i = 0; i < num_attributes; ++i) { 1699 attr = attributes.AttributeAtIndex(i); 1700 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1701 switch (attr) { 1702 case DW_AT_decl_file: 1703 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 1704 form_value.Unsigned())); 1705 break; 1706 case DW_AT_decl_line: 1707 decl.SetLine(form_value.Unsigned()); 1708 break; 1709 case DW_AT_decl_column: 1710 decl.SetColumn(form_value.Unsigned()); 1711 break; 1712 case DW_AT_name: 1713 type_name_cstr = form_value.AsCString(); 1714 type_name_const_str.SetCString(type_name_cstr); 1715 break; 1716 1717 case DW_AT_type: 1718 type_die_form = form_value; 1719 break; 1720 case DW_AT_byte_size: 1721 break; // byte_size = form_value.Unsigned(); break; 1722 case DW_AT_byte_stride: 1723 byte_stride = form_value.Unsigned(); 1724 break; 1725 case DW_AT_bit_stride: 1726 bit_stride = form_value.Unsigned(); 1727 break; 1728 case DW_AT_GNU_vector: 1729 is_vector = form_value.Boolean(); 1730 break; 1731 case DW_AT_accessibility: 1732 break; // accessibility = 1733 // DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 1734 case DW_AT_declaration: 1735 break; // is_forward_declaration = form_value.Boolean(); break; 1736 case DW_AT_allocated: 1737 case DW_AT_associated: 1738 case DW_AT_data_location: 1739 case DW_AT_description: 1740 case DW_AT_ordering: 1741 case DW_AT_start_scope: 1742 case DW_AT_visibility: 1743 case DW_AT_specification: 1744 case DW_AT_abstract_origin: 1745 case DW_AT_sibling: 1746 break; 1747 } 1748 } 1749 } 1750 1751 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1752 DW_TAG_value_to_name(tag), type_name_cstr); 1753 1754 DIERef type_die_ref(type_die_form); 1755 Type *element_type = dwarf->ResolveTypeUID(type_die_ref); 1756 1757 if (element_type) { 1758 std::vector<uint64_t> element_orders; 1759 ParseChildArrayInfo(sc, die, first_index, element_orders, 1760 byte_stride, bit_stride); 1761 if (byte_stride == 0 && bit_stride == 0) 1762 byte_stride = element_type->GetByteSize(); 1763 CompilerType array_element_type = 1764 element_type->GetForwardCompilerType(); 1765 1766 if (ClangASTContext::IsCXXClassType(array_element_type) && 1767 array_element_type.GetCompleteType() == false) { 1768 ModuleSP module_sp = die.GetModule(); 1769 if (module_sp) { 1770 if (die.GetCU()->GetProducer() == 1771 DWARFCompileUnit::eProducerClang) 1772 module_sp->ReportError( 1773 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a " 1774 "class/union/struct element type DIE 0x%8.8x that is a " 1775 "forward declaration, not a complete definition.\nTry " 1776 "compiling the source file with -fstandalone-debug or " 1777 "disable -gmodules", 1778 die.GetOffset(), type_die_ref.die_offset); 1779 else 1780 module_sp->ReportError( 1781 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a " 1782 "class/union/struct element type DIE 0x%8.8x that is a " 1783 "forward declaration, not a complete definition.\nPlease " 1784 "file a bug against the compiler and include the " 1785 "preprocessed output for %s", 1786 die.GetOffset(), type_die_ref.die_offset, 1787 die.GetLLDBCompileUnit() 1788 ? die.GetLLDBCompileUnit()->GetPath().c_str() 1789 : "the source file"); 1790 } 1791 1792 // We have no choice other than to pretend that the element class 1793 // type 1794 // is complete. If we don't do this, clang will crash when trying 1795 // to layout the class. Since we provide layout assistance, all 1796 // ivars in this class and other classes will be fine, this is 1797 // the best we can do short of crashing. 1798 if (ClangASTContext::StartTagDeclarationDefinition( 1799 array_element_type)) { 1800 ClangASTContext::CompleteTagDeclarationDefinition( 1801 array_element_type); 1802 } else { 1803 module_sp->ReportError("DWARF DIE at 0x%8.8x was not able to " 1804 "start its definition.\nPlease file a " 1805 "bug and attach the file at the start " 1806 "of this error message", 1807 type_die_ref.die_offset); 1808 } 1809 } 1810 1811 uint64_t array_element_bit_stride = byte_stride * 8 + bit_stride; 1812 if (element_orders.size() > 0) { 1813 uint64_t num_elements = 0; 1814 std::vector<uint64_t>::const_reverse_iterator pos; 1815 std::vector<uint64_t>::const_reverse_iterator end = 1816 element_orders.rend(); 1817 for (pos = element_orders.rbegin(); pos != end; ++pos) { 1818 num_elements = *pos; 1819 clang_type = m_ast.CreateArrayType(array_element_type, 1820 num_elements, is_vector); 1821 array_element_type = clang_type; 1822 array_element_bit_stride = 1823 num_elements ? array_element_bit_stride * num_elements 1824 : array_element_bit_stride; 1825 } 1826 } else { 1827 clang_type = 1828 m_ast.CreateArrayType(array_element_type, 0, is_vector); 1829 } 1830 ConstString empty_name; 1831 type_sp.reset(new Type( 1832 die.GetID(), dwarf, empty_name, array_element_bit_stride / 8, 1833 NULL, DIERef(type_die_form).GetUID(dwarf), Type::eEncodingIsUID, 1834 &decl, clang_type, Type::eResolveStateFull)); 1835 type_sp->SetEncodingType(element_type); 1836 } 1837 } 1838 } break; 1839 1840 case DW_TAG_ptr_to_member_type: { 1841 DWARFFormValue type_die_form; 1842 DWARFFormValue containing_type_die_form; 1843 1844 const size_t num_attributes = die.GetAttributes(attributes); 1845 1846 if (num_attributes > 0) { 1847 uint32_t i; 1848 for (i = 0; i < num_attributes; ++i) { 1849 attr = attributes.AttributeAtIndex(i); 1850 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1851 switch (attr) { 1852 case DW_AT_type: 1853 type_die_form = form_value; 1854 break; 1855 case DW_AT_containing_type: 1856 containing_type_die_form = form_value; 1857 break; 1858 } 1859 } 1860 } 1861 1862 Type *pointee_type = dwarf->ResolveTypeUID(DIERef(type_die_form)); 1863 Type *class_type = 1864 dwarf->ResolveTypeUID(DIERef(containing_type_die_form)); 1865 1866 CompilerType pointee_clang_type = 1867 pointee_type->GetForwardCompilerType(); 1868 CompilerType class_clang_type = class_type->GetLayoutCompilerType(); 1869 1870 clang_type = ClangASTContext::CreateMemberPointerType( 1871 class_clang_type, pointee_clang_type); 1872 1873 byte_size = clang_type.GetByteSize(nullptr); 1874 1875 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, 1876 byte_size, NULL, LLDB_INVALID_UID, 1877 Type::eEncodingIsUID, NULL, clang_type, 1878 Type::eResolveStateForward)); 1879 } 1880 1881 break; 1882 } 1883 default: 1884 dwarf->GetObjectFile()->GetModule()->ReportError( 1885 "{0x%8.8x}: unhandled type tag 0x%4.4x (%s), please file a bug and " 1886 "attach the file at the start of this error message", 1887 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 1888 break; 1889 } 1890 1891 if (type_sp.get()) { 1892 DWARFDIE sc_parent_die = 1893 SymbolFileDWARF::GetParentSymbolContextDIE(die); 1894 dw_tag_t sc_parent_tag = sc_parent_die.Tag(); 1895 1896 SymbolContextScope *symbol_context_scope = NULL; 1897 if (sc_parent_tag == DW_TAG_compile_unit) { 1898 symbol_context_scope = sc.comp_unit; 1899 } else if (sc.function != NULL && sc_parent_die) { 1900 symbol_context_scope = 1901 sc.function->GetBlock(true).FindBlockByID(sc_parent_die.GetID()); 1902 if (symbol_context_scope == NULL) 1903 symbol_context_scope = sc.function; 1904 } 1905 1906 if (symbol_context_scope != NULL) { 1907 type_sp->SetSymbolContextScope(symbol_context_scope); 1908 } 1909 1910 // We are ready to put this type into the uniqued list up at the module 1911 // level 1912 type_list->Insert(type_sp); 1913 1914 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1915 } 1916 } else if (type_ptr != DIE_IS_BEING_PARSED) { 1917 type_sp = type_ptr->shared_from_this(); 1918 } 1919 } 1920 return type_sp; 1921 } 1922 1923 // DWARF parsing functions 1924 1925 class DWARFASTParserClang::DelayedAddObjCClassProperty { 1926 public: 1927 DelayedAddObjCClassProperty( 1928 const CompilerType &class_opaque_type, const char *property_name, 1929 const CompilerType &property_opaque_type, // The property type is only 1930 // required if you don't have an 1931 // ivar decl 1932 clang::ObjCIvarDecl *ivar_decl, const char *property_setter_name, 1933 const char *property_getter_name, uint32_t property_attributes, 1934 const ClangASTMetadata *metadata) 1935 : m_class_opaque_type(class_opaque_type), m_property_name(property_name), 1936 m_property_opaque_type(property_opaque_type), m_ivar_decl(ivar_decl), 1937 m_property_setter_name(property_setter_name), 1938 m_property_getter_name(property_getter_name), 1939 m_property_attributes(property_attributes) { 1940 if (metadata != NULL) { 1941 m_metadata_ap.reset(new ClangASTMetadata()); 1942 *m_metadata_ap = *metadata; 1943 } 1944 } 1945 1946 DelayedAddObjCClassProperty(const DelayedAddObjCClassProperty &rhs) { 1947 *this = rhs; 1948 } 1949 1950 DelayedAddObjCClassProperty & 1951 operator=(const DelayedAddObjCClassProperty &rhs) { 1952 m_class_opaque_type = rhs.m_class_opaque_type; 1953 m_property_name = rhs.m_property_name; 1954 m_property_opaque_type = rhs.m_property_opaque_type; 1955 m_ivar_decl = rhs.m_ivar_decl; 1956 m_property_setter_name = rhs.m_property_setter_name; 1957 m_property_getter_name = rhs.m_property_getter_name; 1958 m_property_attributes = rhs.m_property_attributes; 1959 1960 if (rhs.m_metadata_ap.get()) { 1961 m_metadata_ap.reset(new ClangASTMetadata()); 1962 *m_metadata_ap = *rhs.m_metadata_ap; 1963 } 1964 return *this; 1965 } 1966 1967 bool Finalize() { 1968 return ClangASTContext::AddObjCClassProperty( 1969 m_class_opaque_type, m_property_name, m_property_opaque_type, 1970 m_ivar_decl, m_property_setter_name, m_property_getter_name, 1971 m_property_attributes, m_metadata_ap.get()); 1972 } 1973 1974 private: 1975 CompilerType m_class_opaque_type; 1976 const char *m_property_name; 1977 CompilerType m_property_opaque_type; 1978 clang::ObjCIvarDecl *m_ivar_decl; 1979 const char *m_property_setter_name; 1980 const char *m_property_getter_name; 1981 uint32_t m_property_attributes; 1982 std::unique_ptr<ClangASTMetadata> m_metadata_ap; 1983 }; 1984 1985 bool DWARFASTParserClang::ParseTemplateDIE( 1986 const DWARFDIE &die, 1987 ClangASTContext::TemplateParameterInfos &template_param_infos) { 1988 const dw_tag_t tag = die.Tag(); 1989 1990 switch (tag) { 1991 case DW_TAG_GNU_template_parameter_pack: { 1992 template_param_infos.packed_args.reset( 1993 new ClangASTContext::TemplateParameterInfos); 1994 for (DWARFDIE child_die = die.GetFirstChild(); child_die.IsValid(); 1995 child_die = child_die.GetSibling()) { 1996 if (!ParseTemplateDIE(child_die, *template_param_infos.packed_args)) 1997 return false; 1998 } 1999 if (const char *name = die.GetName()) { 2000 template_param_infos.pack_name = name; 2001 } 2002 return true; 2003 } 2004 case DW_TAG_template_type_parameter: 2005 case DW_TAG_template_value_parameter: { 2006 DWARFAttributes attributes; 2007 const size_t num_attributes = die.GetAttributes(attributes); 2008 const char *name = nullptr; 2009 CompilerType clang_type; 2010 uint64_t uval64 = 0; 2011 bool uval64_valid = false; 2012 if (num_attributes > 0) { 2013 DWARFFormValue form_value; 2014 for (size_t i = 0; i < num_attributes; ++i) { 2015 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2016 2017 switch (attr) { 2018 case DW_AT_name: 2019 if (attributes.ExtractFormValueAtIndex(i, form_value)) 2020 name = form_value.AsCString(); 2021 break; 2022 2023 case DW_AT_type: 2024 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2025 Type *lldb_type = die.ResolveTypeUID(DIERef(form_value)); 2026 if (lldb_type) 2027 clang_type = lldb_type->GetForwardCompilerType(); 2028 } 2029 break; 2030 2031 case DW_AT_const_value: 2032 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2033 uval64_valid = true; 2034 uval64 = form_value.Unsigned(); 2035 } 2036 break; 2037 default: 2038 break; 2039 } 2040 } 2041 2042 clang::ASTContext *ast = m_ast.getASTContext(); 2043 if (!clang_type) 2044 clang_type = m_ast.GetBasicType(eBasicTypeVoid); 2045 2046 if (clang_type) { 2047 bool is_signed = false; 2048 if (name && name[0]) 2049 template_param_infos.names.push_back(name); 2050 else 2051 template_param_infos.names.push_back(NULL); 2052 2053 // Get the signed value for any integer or enumeration if available 2054 clang_type.IsIntegerOrEnumerationType(is_signed); 2055 2056 if (tag == DW_TAG_template_value_parameter && uval64_valid) { 2057 llvm::APInt apint(clang_type.GetBitSize(nullptr), uval64, is_signed); 2058 template_param_infos.args.push_back( 2059 clang::TemplateArgument(*ast, llvm::APSInt(apint, !is_signed), 2060 ClangUtil::GetQualType(clang_type))); 2061 } else { 2062 template_param_infos.args.push_back( 2063 clang::TemplateArgument(ClangUtil::GetQualType(clang_type))); 2064 } 2065 } else { 2066 return false; 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 ParseTemplateDIE(die, template_param_infos); 2094 break; 2095 2096 default: 2097 break; 2098 } 2099 } 2100 if (template_param_infos.args.empty()) 2101 return false; 2102 return template_param_infos.args.size() == template_param_infos.names.size(); 2103 } 2104 2105 // Checks whether m1 is an overload of m2 (as opposed to an override). 2106 // This is called by addOverridesForMethod to distinguish overrides (which share 2107 // a vtable entry) from overloads (which require distinct entries). 2108 static bool isOverload(clang::CXXMethodDecl *m1, clang::CXXMethodDecl *m2) { 2109 // FIXME: This should detect covariant return types, but currently doesn't. 2110 lldbassert(&m1->getASTContext() == &m2->getASTContext() && 2111 "Methods should have the same AST context"); 2112 clang::ASTContext &context = m1->getASTContext(); 2113 2114 const auto *m1Type = 2115 llvm::cast<clang::FunctionProtoType>( 2116 context.getCanonicalType(m1->getType())); 2117 2118 const auto *m2Type = 2119 llvm::cast<clang::FunctionProtoType>( 2120 context.getCanonicalType(m2->getType())); 2121 2122 auto compareArgTypes = 2123 [&context](const clang::QualType &m1p, const clang::QualType &m2p) { 2124 return context.hasSameType(m1p.getUnqualifiedType(), 2125 m2p.getUnqualifiedType()); 2126 }; 2127 2128 return !std::equal(m1Type->param_type_begin(), m1Type->param_type_end(), 2129 m2Type->param_type_begin(), compareArgTypes); 2130 } 2131 2132 // If decl is a virtual method, walk the base classes looking for methods that 2133 // decl overrides. This table of overridden methods is used by IRGen to determine 2134 // the vtable layout for decl's parent class. 2135 static void addOverridesForMethod(clang::CXXMethodDecl *decl) { 2136 if (!decl->isVirtual()) 2137 return; 2138 2139 clang::CXXBasePaths paths; 2140 2141 auto find_overridden_methods = 2142 [decl](const clang::CXXBaseSpecifier *specifier, clang::CXXBasePath &path) { 2143 if (auto *base_record = 2144 llvm::dyn_cast<clang::CXXRecordDecl>( 2145 specifier->getType()->getAs<clang::RecordType>()->getDecl())) { 2146 2147 clang::DeclarationName name = decl->getDeclName(); 2148 2149 // If this is a destructor, check whether the base class destructor is 2150 // virtual. 2151 if (name.getNameKind() == clang::DeclarationName::CXXDestructorName) 2152 if (auto *baseDtorDecl = base_record->getDestructor()) { 2153 if (baseDtorDecl->isVirtual()) { 2154 path.Decls = baseDtorDecl; 2155 return true; 2156 } else 2157 return false; 2158 } 2159 2160 // Otherwise, search for name in the base class. 2161 for (path.Decls = base_record->lookup(name); !path.Decls.empty(); 2162 path.Decls = path.Decls.slice(1)) { 2163 if (auto *method_decl = 2164 llvm::dyn_cast<clang::CXXMethodDecl>(path.Decls.front())) 2165 if (method_decl->isVirtual() && !isOverload(decl, method_decl)) { 2166 path.Decls = method_decl; 2167 return true; 2168 } 2169 } 2170 } 2171 2172 return false; 2173 }; 2174 2175 if (decl->getParent()->lookupInBases(find_overridden_methods, paths)) { 2176 for (auto *overridden_decl : paths.found_decls()) 2177 decl->addOverriddenMethod( 2178 llvm::cast<clang::CXXMethodDecl>(overridden_decl)); 2179 } 2180 } 2181 2182 // If clang_type is a CXXRecordDecl, builds the method override list for each 2183 // of its virtual methods. 2184 static void addMethodOverrides(ClangASTContext &ast, CompilerType &clang_type) { 2185 if (auto *record = 2186 ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType())) 2187 for (auto *method : record->methods()) 2188 addOverridesForMethod(method); 2189 } 2190 2191 bool DWARFASTParserClang::CompleteTypeFromDWARF(const DWARFDIE &die, 2192 lldb_private::Type *type, 2193 CompilerType &clang_type) { 2194 SymbolFileDWARF *dwarf = die.GetDWARF(); 2195 2196 std::lock_guard<std::recursive_mutex> guard( 2197 dwarf->GetObjectFile()->GetModule()->GetMutex()); 2198 2199 // Disable external storage for this type so we don't get anymore 2200 // clang::ExternalASTSource queries for this type. 2201 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), false); 2202 2203 if (!die) 2204 return false; 2205 2206 #if defined LLDB_CONFIGURATION_DEBUG 2207 //---------------------------------------------------------------------- 2208 // For debugging purposes, the LLDB_DWARF_DONT_COMPLETE_TYPENAMES 2209 // environment variable can be set with one or more typenames separated 2210 // by ';' characters. This will cause this function to not complete any 2211 // types whose names match. 2212 // 2213 // Examples of setting this environment variable: 2214 // 2215 // LLDB_DWARF_DONT_COMPLETE_TYPENAMES=Foo 2216 // LLDB_DWARF_DONT_COMPLETE_TYPENAMES=Foo;Bar;Baz 2217 //---------------------------------------------------------------------- 2218 const char *dont_complete_typenames_cstr = 2219 getenv("LLDB_DWARF_DONT_COMPLETE_TYPENAMES"); 2220 if (dont_complete_typenames_cstr && dont_complete_typenames_cstr[0]) { 2221 const char *die_name = die.GetName(); 2222 if (die_name && die_name[0]) { 2223 const char *match = strstr(dont_complete_typenames_cstr, die_name); 2224 if (match) { 2225 size_t die_name_length = strlen(die_name); 2226 while (match) { 2227 const char separator_char = ';'; 2228 const char next_char = match[die_name_length]; 2229 if (next_char == '\0' || next_char == separator_char) { 2230 if (match == dont_complete_typenames_cstr || 2231 match[-1] == separator_char) 2232 return false; 2233 } 2234 match = strstr(match + 1, die_name); 2235 } 2236 } 2237 } 2238 } 2239 #endif 2240 2241 const dw_tag_t tag = die.Tag(); 2242 2243 Log *log = 2244 nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION)); 2245 if (log) 2246 dwarf->GetObjectFile()->GetModule()->LogMessageVerboseBacktrace( 2247 log, "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...", 2248 die.GetID(), die.GetTagAsCString(), type->GetName().AsCString()); 2249 assert(clang_type); 2250 DWARFAttributes attributes; 2251 switch (tag) { 2252 case DW_TAG_structure_type: 2253 case DW_TAG_union_type: 2254 case DW_TAG_class_type: { 2255 ClangASTImporter::LayoutInfo layout_info; 2256 2257 { 2258 if (die.HasChildren()) { 2259 LanguageType class_language = eLanguageTypeUnknown; 2260 if (ClangASTContext::IsObjCObjectOrInterfaceType(clang_type)) { 2261 class_language = eLanguageTypeObjC; 2262 // For objective C we don't start the definition when 2263 // the class is created. 2264 ClangASTContext::StartTagDeclarationDefinition(clang_type); 2265 } 2266 2267 int tag_decl_kind = -1; 2268 AccessType default_accessibility = eAccessNone; 2269 if (tag == DW_TAG_structure_type) { 2270 tag_decl_kind = clang::TTK_Struct; 2271 default_accessibility = eAccessPublic; 2272 } else if (tag == DW_TAG_union_type) { 2273 tag_decl_kind = clang::TTK_Union; 2274 default_accessibility = eAccessPublic; 2275 } else if (tag == DW_TAG_class_type) { 2276 tag_decl_kind = clang::TTK_Class; 2277 default_accessibility = eAccessPrivate; 2278 } 2279 2280 SymbolContext sc(die.GetLLDBCompileUnit()); 2281 std::vector<clang::CXXBaseSpecifier *> base_classes; 2282 std::vector<int> member_accessibilities; 2283 bool is_a_class = false; 2284 // Parse members and base classes first 2285 DWARFDIECollection member_function_dies; 2286 2287 DelayedPropertyList delayed_properties; 2288 ParseChildMembers(sc, die, clang_type, class_language, base_classes, 2289 member_accessibilities, member_function_dies, 2290 delayed_properties, default_accessibility, is_a_class, 2291 layout_info); 2292 2293 // Now parse any methods if there were any... 2294 size_t num_functions = member_function_dies.Size(); 2295 if (num_functions > 0) { 2296 for (size_t i = 0; i < num_functions; ++i) { 2297 dwarf->ResolveType(member_function_dies.GetDIEAtIndex(i)); 2298 } 2299 } 2300 2301 if (class_language == eLanguageTypeObjC) { 2302 ConstString class_name(clang_type.GetTypeName()); 2303 if (class_name) { 2304 DIEArray method_die_offsets; 2305 dwarf->GetObjCMethodDIEOffsets(class_name, method_die_offsets); 2306 2307 if (!method_die_offsets.empty()) { 2308 DWARFDebugInfo *debug_info = dwarf->DebugInfo(); 2309 2310 const size_t num_matches = method_die_offsets.size(); 2311 for (size_t i = 0; i < num_matches; ++i) { 2312 const DIERef &die_ref = method_die_offsets[i]; 2313 DWARFDIE method_die = debug_info->GetDIE(die_ref); 2314 2315 if (method_die) 2316 method_die.ResolveType(); 2317 } 2318 } 2319 2320 for (DelayedPropertyList::iterator pi = delayed_properties.begin(), 2321 pe = delayed_properties.end(); 2322 pi != pe; ++pi) 2323 pi->Finalize(); 2324 } 2325 } 2326 2327 // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we 2328 // need to tell the clang type it is actually a class. 2329 if (class_language != eLanguageTypeObjC) { 2330 if (is_a_class && tag_decl_kind != clang::TTK_Class) 2331 m_ast.SetTagTypeKind(ClangUtil::GetQualType(clang_type), 2332 clang::TTK_Class); 2333 } 2334 2335 // Since DW_TAG_structure_type gets used for both classes 2336 // and structures, we may need to set any DW_TAG_member 2337 // fields to have a "private" access if none was specified. 2338 // When we parsed the child members we tracked that actual 2339 // accessibility value for each DW_TAG_member in the 2340 // "member_accessibilities" array. If the value for the 2341 // member is zero, then it was set to the "default_accessibility" 2342 // which for structs was "public". Below we correct this 2343 // by setting any fields to "private" that weren't correctly 2344 // set. 2345 if (is_a_class && !member_accessibilities.empty()) { 2346 // This is a class and all members that didn't have 2347 // their access specified are private. 2348 m_ast.SetDefaultAccessForRecordFields( 2349 m_ast.GetAsRecordDecl(clang_type), eAccessPrivate, 2350 &member_accessibilities.front(), member_accessibilities.size()); 2351 } 2352 2353 if (!base_classes.empty()) { 2354 // Make sure all base classes refer to complete types and not 2355 // forward declarations. If we don't do this, clang will crash 2356 // with an assertion in the call to 2357 // clang_type.SetBaseClassesForClassType() 2358 for (auto &base_class : base_classes) { 2359 clang::TypeSourceInfo *type_source_info = 2360 base_class->getTypeSourceInfo(); 2361 if (type_source_info) { 2362 CompilerType base_class_type( 2363 &m_ast, type_source_info->getType().getAsOpaquePtr()); 2364 if (base_class_type.GetCompleteType() == false) { 2365 auto module = dwarf->GetObjectFile()->GetModule(); 2366 module->ReportError(":: Class '%s' has a base class '%s' which " 2367 "does not have a complete definition.", 2368 die.GetName(), 2369 base_class_type.GetTypeName().GetCString()); 2370 if (die.GetCU()->GetProducer() == 2371 DWARFCompileUnit::eProducerClang) 2372 module->ReportError(":: Try compiling the source file with " 2373 "-fstandalone-debug."); 2374 2375 // We have no choice other than to pretend that the base class 2376 // is complete. If we don't do this, clang will crash when we 2377 // call setBases() inside of 2378 // "clang_type.SetBaseClassesForClassType()" 2379 // below. Since we provide layout assistance, all ivars in this 2380 // class and other classes will be fine, this is the best we can 2381 // do 2382 // short of crashing. 2383 if (ClangASTContext::StartTagDeclarationDefinition( 2384 base_class_type)) { 2385 ClangASTContext::CompleteTagDeclarationDefinition( 2386 base_class_type); 2387 } 2388 } 2389 } 2390 } 2391 m_ast.SetBaseClassesForClassType(clang_type.GetOpaqueQualType(), 2392 &base_classes.front(), 2393 base_classes.size()); 2394 2395 // Clang will copy each CXXBaseSpecifier in "base_classes" 2396 // so we have to free them all. 2397 ClangASTContext::DeleteBaseClassSpecifiers(&base_classes.front(), 2398 base_classes.size()); 2399 } 2400 } 2401 } 2402 2403 addMethodOverrides(m_ast, clang_type); 2404 ClangASTContext::BuildIndirectFields(clang_type); 2405 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 2406 2407 if (!layout_info.field_offsets.empty() || 2408 !layout_info.base_offsets.empty() || 2409 !layout_info.vbase_offsets.empty()) { 2410 if (type) 2411 layout_info.bit_size = type->GetByteSize() * 8; 2412 if (layout_info.bit_size == 0) 2413 layout_info.bit_size = 2414 die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 0) * 8; 2415 2416 clang::CXXRecordDecl *record_decl = 2417 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 2418 if (record_decl) { 2419 if (log) { 2420 ModuleSP module_sp = dwarf->GetObjectFile()->GetModule(); 2421 2422 if (module_sp) { 2423 module_sp->LogMessage( 2424 log, 2425 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) " 2426 "caching layout info for record_decl = %p, bit_size = %" PRIu64 2427 ", alignment = %" PRIu64 2428 ", field_offsets[%u], base_offsets[%u], vbase_offsets[%u])", 2429 static_cast<void *>(clang_type.GetOpaqueQualType()), 2430 static_cast<void *>(record_decl), layout_info.bit_size, 2431 layout_info.alignment, 2432 static_cast<uint32_t>(layout_info.field_offsets.size()), 2433 static_cast<uint32_t>(layout_info.base_offsets.size()), 2434 static_cast<uint32_t>(layout_info.vbase_offsets.size())); 2435 2436 uint32_t idx; 2437 { 2438 llvm::DenseMap<const clang::FieldDecl *, uint64_t>::const_iterator 2439 pos, 2440 end = layout_info.field_offsets.end(); 2441 for (idx = 0, pos = layout_info.field_offsets.begin(); pos != end; 2442 ++pos, ++idx) { 2443 module_sp->LogMessage( 2444 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2445 "%p) field[%u] = { bit_offset=%u, name='%s' }", 2446 static_cast<void *>(clang_type.GetOpaqueQualType()), idx, 2447 static_cast<uint32_t>(pos->second), 2448 pos->first->getNameAsString().c_str()); 2449 } 2450 } 2451 2452 { 2453 llvm::DenseMap<const clang::CXXRecordDecl *, 2454 clang::CharUnits>::const_iterator base_pos, 2455 base_end = layout_info.base_offsets.end(); 2456 for (idx = 0, base_pos = layout_info.base_offsets.begin(); 2457 base_pos != base_end; ++base_pos, ++idx) { 2458 module_sp->LogMessage( 2459 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2460 "%p) base[%u] = { byte_offset=%u, name='%s' }", 2461 clang_type.GetOpaqueQualType(), idx, 2462 (uint32_t)base_pos->second.getQuantity(), 2463 base_pos->first->getNameAsString().c_str()); 2464 } 2465 } 2466 { 2467 llvm::DenseMap<const clang::CXXRecordDecl *, 2468 clang::CharUnits>::const_iterator vbase_pos, 2469 vbase_end = layout_info.vbase_offsets.end(); 2470 for (idx = 0, vbase_pos = layout_info.vbase_offsets.begin(); 2471 vbase_pos != vbase_end; ++vbase_pos, ++idx) { 2472 module_sp->LogMessage( 2473 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2474 "%p) vbase[%u] = { byte_offset=%u, name='%s' }", 2475 static_cast<void *>(clang_type.GetOpaqueQualType()), idx, 2476 static_cast<uint32_t>(vbase_pos->second.getQuantity()), 2477 vbase_pos->first->getNameAsString().c_str()); 2478 } 2479 } 2480 } 2481 } 2482 GetClangASTImporter().InsertRecordDecl(record_decl, layout_info); 2483 } 2484 } 2485 } 2486 2487 return (bool)clang_type; 2488 2489 case DW_TAG_enumeration_type: 2490 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 2491 if (die.HasChildren()) { 2492 SymbolContext sc(die.GetLLDBCompileUnit()); 2493 bool is_signed = false; 2494 clang_type.IsIntegerType(is_signed); 2495 ParseChildEnumerators(sc, clang_type, is_signed, type->GetByteSize(), 2496 die); 2497 } 2498 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 2499 } 2500 return (bool)clang_type; 2501 2502 default: 2503 assert(false && "not a forward clang type decl!"); 2504 break; 2505 } 2506 2507 return false; 2508 } 2509 2510 std::vector<DWARFDIE> DWARFASTParserClang::GetDIEForDeclContext( 2511 lldb_private::CompilerDeclContext decl_context) { 2512 std::vector<DWARFDIE> result; 2513 for (auto it = m_decl_ctx_to_die.find( 2514 (clang::DeclContext *)decl_context.GetOpaqueDeclContext()); 2515 it != m_decl_ctx_to_die.end(); it++) 2516 result.push_back(it->second); 2517 return result; 2518 } 2519 2520 CompilerDecl DWARFASTParserClang::GetDeclForUIDFromDWARF(const DWARFDIE &die) { 2521 clang::Decl *clang_decl = GetClangDeclForDIE(die); 2522 if (clang_decl != nullptr) 2523 return CompilerDecl(&m_ast, clang_decl); 2524 return CompilerDecl(); 2525 } 2526 2527 CompilerDeclContext 2528 DWARFASTParserClang::GetDeclContextForUIDFromDWARF(const DWARFDIE &die) { 2529 clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE(die); 2530 if (clang_decl_ctx) 2531 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2532 return CompilerDeclContext(); 2533 } 2534 2535 CompilerDeclContext 2536 DWARFASTParserClang::GetDeclContextContainingUIDFromDWARF(const DWARFDIE &die) { 2537 clang::DeclContext *clang_decl_ctx = 2538 GetClangDeclContextContainingDIE(die, nullptr); 2539 if (clang_decl_ctx) 2540 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2541 return CompilerDeclContext(); 2542 } 2543 2544 size_t DWARFASTParserClang::ParseChildEnumerators( 2545 const SymbolContext &sc, lldb_private::CompilerType &clang_type, 2546 bool is_signed, uint32_t enumerator_byte_size, const DWARFDIE &parent_die) { 2547 if (!parent_die) 2548 return 0; 2549 2550 size_t enumerators_added = 0; 2551 2552 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2553 die = die.GetSibling()) { 2554 const dw_tag_t tag = die.Tag(); 2555 if (tag == DW_TAG_enumerator) { 2556 DWARFAttributes attributes; 2557 const size_t num_child_attributes = die.GetAttributes(attributes); 2558 if (num_child_attributes > 0) { 2559 const char *name = NULL; 2560 bool got_value = false; 2561 int64_t enum_value = 0; 2562 Declaration decl; 2563 2564 uint32_t i; 2565 for (i = 0; i < num_child_attributes; ++i) { 2566 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2567 DWARFFormValue form_value; 2568 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2569 switch (attr) { 2570 case DW_AT_const_value: 2571 got_value = true; 2572 if (is_signed) 2573 enum_value = form_value.Signed(); 2574 else 2575 enum_value = form_value.Unsigned(); 2576 break; 2577 2578 case DW_AT_name: 2579 name = form_value.AsCString(); 2580 break; 2581 2582 case DW_AT_description: 2583 default: 2584 case DW_AT_decl_file: 2585 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 2586 form_value.Unsigned())); 2587 break; 2588 case DW_AT_decl_line: 2589 decl.SetLine(form_value.Unsigned()); 2590 break; 2591 case DW_AT_decl_column: 2592 decl.SetColumn(form_value.Unsigned()); 2593 break; 2594 case DW_AT_sibling: 2595 break; 2596 } 2597 } 2598 } 2599 2600 if (name && name[0] && got_value) { 2601 m_ast.AddEnumerationValueToEnumerationType( 2602 clang_type.GetOpaqueQualType(), 2603 m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType()), 2604 decl, name, enum_value, enumerator_byte_size * 8); 2605 ++enumerators_added; 2606 } 2607 } 2608 } 2609 } 2610 return enumerators_added; 2611 } 2612 2613 #if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE) 2614 2615 class DIEStack { 2616 public: 2617 void Push(const DWARFDIE &die) { m_dies.push_back(die); } 2618 2619 void LogDIEs(Log *log) { 2620 StreamString log_strm; 2621 const size_t n = m_dies.size(); 2622 log_strm.Printf("DIEStack[%" PRIu64 "]:\n", (uint64_t)n); 2623 for (size_t i = 0; i < n; i++) { 2624 std::string qualified_name; 2625 const DWARFDIE &die = m_dies[i]; 2626 die.GetQualifiedName(qualified_name); 2627 log_strm.Printf("[%" PRIu64 "] 0x%8.8x: %s name='%s'\n", (uint64_t)i, 2628 die.GetOffset(), die.GetTagAsCString(), 2629 qualified_name.c_str()); 2630 } 2631 log->PutCString(log_strm.GetData()); 2632 } 2633 void Pop() { m_dies.pop_back(); } 2634 2635 class ScopedPopper { 2636 public: 2637 ScopedPopper(DIEStack &die_stack) 2638 : m_die_stack(die_stack), m_valid(false) {} 2639 2640 void Push(const DWARFDIE &die) { 2641 m_valid = true; 2642 m_die_stack.Push(die); 2643 } 2644 2645 ~ScopedPopper() { 2646 if (m_valid) 2647 m_die_stack.Pop(); 2648 } 2649 2650 protected: 2651 DIEStack &m_die_stack; 2652 bool m_valid; 2653 }; 2654 2655 protected: 2656 typedef std::vector<DWARFDIE> Stack; 2657 Stack m_dies; 2658 }; 2659 #endif 2660 2661 Function *DWARFASTParserClang::ParseFunctionFromDWARF(const SymbolContext &sc, 2662 const DWARFDIE &die) { 2663 DWARFRangeList func_ranges; 2664 const char *name = NULL; 2665 const char *mangled = NULL; 2666 int decl_file = 0; 2667 int decl_line = 0; 2668 int decl_column = 0; 2669 int call_file = 0; 2670 int call_line = 0; 2671 int call_column = 0; 2672 DWARFExpression frame_base(die.GetCU()); 2673 2674 const dw_tag_t tag = die.Tag(); 2675 2676 if (tag != DW_TAG_subprogram) 2677 return NULL; 2678 2679 if (die.GetDIENamesAndRanges(name, mangled, func_ranges, decl_file, decl_line, 2680 decl_column, call_file, call_line, call_column, 2681 &frame_base)) { 2682 2683 // Union of all ranges in the function DIE (if the function is 2684 // discontiguous) 2685 AddressRange func_range; 2686 lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase(0); 2687 lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd(0); 2688 if (lowest_func_addr != LLDB_INVALID_ADDRESS && 2689 lowest_func_addr <= highest_func_addr) { 2690 ModuleSP module_sp(die.GetModule()); 2691 func_range.GetBaseAddress().ResolveAddressUsingFileSections( 2692 lowest_func_addr, module_sp->GetSectionList()); 2693 if (func_range.GetBaseAddress().IsValid()) 2694 func_range.SetByteSize(highest_func_addr - lowest_func_addr); 2695 } 2696 2697 if (func_range.GetBaseAddress().IsValid()) { 2698 Mangled func_name; 2699 if (mangled) 2700 func_name.SetValue(ConstString(mangled), true); 2701 else if (die.GetParent().Tag() == DW_TAG_compile_unit && 2702 Language::LanguageIsCPlusPlus(die.GetLanguage()) && name && 2703 strcmp(name, "main") != 0) { 2704 // If the mangled name is not present in the DWARF, generate the 2705 // demangled name 2706 // using the decl context. We skip if the function is "main" as its name 2707 // is 2708 // never mangled. 2709 bool is_static = false; 2710 bool is_variadic = false; 2711 bool has_template_params = false; 2712 unsigned type_quals = 0; 2713 std::vector<CompilerType> param_types; 2714 std::vector<clang::ParmVarDecl *> param_decls; 2715 DWARFDeclContext decl_ctx; 2716 StreamString sstr; 2717 2718 die.GetDWARFDeclContext(decl_ctx); 2719 sstr << decl_ctx.GetQualifiedName(); 2720 2721 clang::DeclContext *containing_decl_ctx = 2722 GetClangDeclContextContainingDIE(die, nullptr); 2723 ParseChildParameters(sc, containing_decl_ctx, die, true, is_static, 2724 is_variadic, has_template_params, param_types, 2725 param_decls, type_quals); 2726 sstr << "("; 2727 for (size_t i = 0; i < param_types.size(); i++) { 2728 if (i > 0) 2729 sstr << ", "; 2730 sstr << param_types[i].GetTypeName(); 2731 } 2732 if (is_variadic) 2733 sstr << ", ..."; 2734 sstr << ")"; 2735 if (type_quals & clang::Qualifiers::Const) 2736 sstr << " const"; 2737 2738 func_name.SetValue(ConstString(sstr.GetString()), false); 2739 } else 2740 func_name.SetValue(ConstString(name), false); 2741 2742 FunctionSP func_sp; 2743 std::unique_ptr<Declaration> decl_ap; 2744 if (decl_file != 0 || decl_line != 0 || decl_column != 0) 2745 decl_ap.reset(new Declaration( 2746 sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file), 2747 decl_line, decl_column)); 2748 2749 SymbolFileDWARF *dwarf = die.GetDWARF(); 2750 // Supply the type _only_ if it has already been parsed 2751 Type *func_type = dwarf->GetDIEToType().lookup(die.GetDIE()); 2752 2753 assert(func_type == NULL || func_type != DIE_IS_BEING_PARSED); 2754 2755 if (dwarf->FixupAddress(func_range.GetBaseAddress())) { 2756 const user_id_t func_user_id = die.GetID(); 2757 func_sp.reset(new Function(sc.comp_unit, 2758 func_user_id, // UserID is the DIE offset 2759 func_user_id, func_name, func_type, 2760 func_range)); // first address range 2761 2762 if (func_sp.get() != NULL) { 2763 if (frame_base.IsValid()) 2764 func_sp->GetFrameBaseExpression() = frame_base; 2765 sc.comp_unit->AddFunction(func_sp); 2766 return func_sp.get(); 2767 } 2768 } 2769 } 2770 } 2771 return NULL; 2772 } 2773 2774 bool DWARFASTParserClang::ParseChildMembers( 2775 const SymbolContext &sc, const DWARFDIE &parent_die, 2776 CompilerType &class_clang_type, const LanguageType class_language, 2777 std::vector<clang::CXXBaseSpecifier *> &base_classes, 2778 std::vector<int> &member_accessibilities, 2779 DWARFDIECollection &member_function_dies, 2780 DelayedPropertyList &delayed_properties, AccessType &default_accessibility, 2781 bool &is_a_class, ClangASTImporter::LayoutInfo &layout_info) { 2782 if (!parent_die) 2783 return 0; 2784 2785 // Get the parent byte size so we can verify any members will fit 2786 const uint64_t parent_byte_size = 2787 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, UINT64_MAX); 2788 const uint64_t parent_bit_size = 2789 parent_byte_size == UINT64_MAX ? UINT64_MAX : parent_byte_size * 8; 2790 2791 uint32_t member_idx = 0; 2792 BitfieldInfo last_field_info; 2793 2794 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule(); 2795 ClangASTContext *ast = 2796 llvm::dyn_cast_or_null<ClangASTContext>(class_clang_type.GetTypeSystem()); 2797 if (ast == nullptr) 2798 return 0; 2799 2800 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2801 die = die.GetSibling()) { 2802 dw_tag_t tag = die.Tag(); 2803 2804 switch (tag) { 2805 case DW_TAG_member: 2806 case DW_TAG_APPLE_property: { 2807 DWARFAttributes attributes; 2808 const size_t num_attributes = die.GetAttributes(attributes); 2809 if (num_attributes > 0) { 2810 Declaration decl; 2811 // DWARFExpression location; 2812 const char *name = NULL; 2813 const char *prop_name = NULL; 2814 const char *prop_getter_name = NULL; 2815 const char *prop_setter_name = NULL; 2816 uint32_t prop_attributes = 0; 2817 2818 bool is_artificial = false; 2819 DWARFFormValue encoding_form; 2820 AccessType accessibility = eAccessNone; 2821 uint32_t member_byte_offset = 2822 (parent_die.Tag() == DW_TAG_union_type) ? 0 : UINT32_MAX; 2823 size_t byte_size = 0; 2824 int64_t bit_offset = 0; 2825 uint64_t data_bit_offset = UINT64_MAX; 2826 size_t bit_size = 0; 2827 bool is_external = 2828 false; // On DW_TAG_members, this means the member is static 2829 uint32_t i; 2830 for (i = 0; i < num_attributes && !is_artificial; ++i) { 2831 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2832 DWARFFormValue form_value; 2833 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2834 switch (attr) { 2835 case DW_AT_decl_file: 2836 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 2837 form_value.Unsigned())); 2838 break; 2839 case DW_AT_decl_line: 2840 decl.SetLine(form_value.Unsigned()); 2841 break; 2842 case DW_AT_decl_column: 2843 decl.SetColumn(form_value.Unsigned()); 2844 break; 2845 case DW_AT_name: 2846 name = form_value.AsCString(); 2847 break; 2848 case DW_AT_type: 2849 encoding_form = form_value; 2850 break; 2851 case DW_AT_bit_offset: 2852 bit_offset = form_value.Signed(); 2853 break; 2854 case DW_AT_bit_size: 2855 bit_size = form_value.Unsigned(); 2856 break; 2857 case DW_AT_byte_size: 2858 byte_size = form_value.Unsigned(); 2859 break; 2860 case DW_AT_data_bit_offset: 2861 data_bit_offset = form_value.Unsigned(); 2862 break; 2863 case DW_AT_data_member_location: 2864 if (form_value.BlockData()) { 2865 Value initialValue(0); 2866 Value memberOffset(0); 2867 const DWARFDataExtractor &debug_info_data = 2868 die.GetDWARF()->get_debug_info_data(); 2869 uint32_t block_length = form_value.Unsigned(); 2870 uint32_t block_offset = 2871 form_value.BlockData() - debug_info_data.GetDataStart(); 2872 if (DWARFExpression::Evaluate( 2873 nullptr, // ExecutionContext * 2874 nullptr, // RegisterContext * 2875 module_sp, debug_info_data, die.GetCU(), block_offset, 2876 block_length, eRegisterKindDWARF, &initialValue, 2877 nullptr, memberOffset, nullptr)) { 2878 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 2879 } 2880 } else { 2881 // With DWARF 3 and later, if the value is an integer constant, 2882 // this form value is the offset in bytes from the beginning 2883 // of the containing entity. 2884 member_byte_offset = form_value.Unsigned(); 2885 } 2886 break; 2887 2888 case DW_AT_accessibility: 2889 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 2890 break; 2891 case DW_AT_artificial: 2892 is_artificial = form_value.Boolean(); 2893 break; 2894 case DW_AT_APPLE_property_name: 2895 prop_name = form_value.AsCString(); 2896 break; 2897 case DW_AT_APPLE_property_getter: 2898 prop_getter_name = form_value.AsCString(); 2899 break; 2900 case DW_AT_APPLE_property_setter: 2901 prop_setter_name = form_value.AsCString(); 2902 break; 2903 case DW_AT_APPLE_property_attribute: 2904 prop_attributes = form_value.Unsigned(); 2905 break; 2906 case DW_AT_external: 2907 is_external = form_value.Boolean(); 2908 break; 2909 2910 default: 2911 case DW_AT_declaration: 2912 case DW_AT_description: 2913 case DW_AT_mutable: 2914 case DW_AT_visibility: 2915 case DW_AT_sibling: 2916 break; 2917 } 2918 } 2919 } 2920 2921 if (prop_name) { 2922 ConstString fixed_getter; 2923 ConstString fixed_setter; 2924 2925 // Check if the property getter/setter were provided as full 2926 // names. We want basenames, so we extract them. 2927 2928 if (prop_getter_name && prop_getter_name[0] == '-') { 2929 ObjCLanguage::MethodName prop_getter_method(prop_getter_name, true); 2930 prop_getter_name = prop_getter_method.GetSelector().GetCString(); 2931 } 2932 2933 if (prop_setter_name && prop_setter_name[0] == '-') { 2934 ObjCLanguage::MethodName prop_setter_method(prop_setter_name, true); 2935 prop_setter_name = prop_setter_method.GetSelector().GetCString(); 2936 } 2937 2938 // If the names haven't been provided, they need to be 2939 // filled in. 2940 2941 if (!prop_getter_name) { 2942 prop_getter_name = prop_name; 2943 } 2944 if (!prop_setter_name && prop_name[0] && 2945 !(prop_attributes & DW_APPLE_PROPERTY_readonly)) { 2946 StreamString ss; 2947 2948 ss.Printf("set%c%s:", toupper(prop_name[0]), &prop_name[1]); 2949 2950 fixed_setter.SetString(ss.GetString()); 2951 prop_setter_name = fixed_setter.GetCString(); 2952 } 2953 } 2954 2955 // Clang has a DWARF generation bug where sometimes it 2956 // represents fields that are references with bad byte size 2957 // and bit size/offset information such as: 2958 // 2959 // DW_AT_byte_size( 0x00 ) 2960 // DW_AT_bit_size( 0x40 ) 2961 // DW_AT_bit_offset( 0xffffffffffffffc0 ) 2962 // 2963 // So check the bit offset to make sure it is sane, and if 2964 // the values are not sane, remove them. If we don't do this 2965 // then we will end up with a crash if we try to use this 2966 // type in an expression when clang becomes unhappy with its 2967 // recycled debug info. 2968 2969 if (byte_size == 0 && bit_offset < 0) { 2970 bit_size = 0; 2971 bit_offset = 0; 2972 } 2973 2974 // FIXME: Make Clang ignore Objective-C accessibility for expressions 2975 if (class_language == eLanguageTypeObjC || 2976 class_language == eLanguageTypeObjC_plus_plus) 2977 accessibility = eAccessNone; 2978 2979 if (member_idx == 0 && !is_artificial && name && 2980 (strstr(name, "_vptr$") == name)) { 2981 // Not all compilers will mark the vtable pointer 2982 // member as artificial (llvm-gcc). We can't have 2983 // the virtual members in our classes otherwise it 2984 // throws off all child offsets since we end up 2985 // having and extra pointer sized member in our 2986 // class layouts. 2987 is_artificial = true; 2988 } 2989 2990 // Handle static members 2991 if (is_external && member_byte_offset == UINT32_MAX) { 2992 Type *var_type = die.ResolveTypeUID(DIERef(encoding_form)); 2993 2994 if (var_type) { 2995 if (accessibility == eAccessNone) 2996 accessibility = eAccessPublic; 2997 ClangASTContext::AddVariableToRecordType( 2998 class_clang_type, name, var_type->GetLayoutCompilerType(), 2999 accessibility); 3000 } 3001 break; 3002 } 3003 3004 if (is_artificial == false) { 3005 Type *member_type = die.ResolveTypeUID(DIERef(encoding_form)); 3006 3007 clang::FieldDecl *field_decl = NULL; 3008 if (tag == DW_TAG_member) { 3009 if (member_type) { 3010 if (accessibility == eAccessNone) 3011 accessibility = default_accessibility; 3012 member_accessibilities.push_back(accessibility); 3013 3014 uint64_t field_bit_offset = 3015 (member_byte_offset == UINT32_MAX ? 0 3016 : (member_byte_offset * 8)); 3017 if (bit_size > 0) { 3018 3019 BitfieldInfo this_field_info; 3020 this_field_info.bit_offset = field_bit_offset; 3021 this_field_info.bit_size = bit_size; 3022 3023 ///////////////////////////////////////////////////////////// 3024 // How to locate a field given the DWARF debug information 3025 // 3026 // AT_byte_size indicates the size of the word in which the 3027 // bit offset must be interpreted. 3028 // 3029 // AT_data_member_location indicates the byte offset of the 3030 // word from the base address of the structure. 3031 // 3032 // AT_bit_offset indicates how many bits into the word 3033 // (according to the host endianness) the low-order bit of 3034 // the field starts. AT_bit_offset can be negative. 3035 // 3036 // AT_bit_size indicates the size of the field in bits. 3037 ///////////////////////////////////////////////////////////// 3038 3039 if (data_bit_offset != UINT64_MAX) { 3040 this_field_info.bit_offset = data_bit_offset; 3041 } else { 3042 if (byte_size == 0) 3043 byte_size = member_type->GetByteSize(); 3044 3045 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 3046 if (objfile->GetByteOrder() == eByteOrderLittle) { 3047 this_field_info.bit_offset += byte_size * 8; 3048 this_field_info.bit_offset -= (bit_offset + bit_size); 3049 } else { 3050 this_field_info.bit_offset += bit_offset; 3051 } 3052 } 3053 3054 if ((this_field_info.bit_offset >= parent_bit_size) || 3055 !last_field_info.NextBitfieldOffsetIsValid( 3056 this_field_info.bit_offset)) { 3057 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 3058 objfile->GetModule()->ReportWarning( 3059 "0x%8.8" PRIx64 ": %s bitfield named \"%s\" has invalid " 3060 "bit offset (0x%8.8" PRIx64 3061 ") member will be ignored. Please file a bug against the " 3062 "compiler and include the preprocessed output for %s\n", 3063 die.GetID(), DW_TAG_value_to_name(tag), name, 3064 this_field_info.bit_offset, 3065 sc.comp_unit ? sc.comp_unit->GetPath().c_str() 3066 : "the source file"); 3067 this_field_info.Clear(); 3068 continue; 3069 } 3070 3071 // Update the field bit offset we will report for layout 3072 field_bit_offset = this_field_info.bit_offset; 3073 3074 // If the member to be emitted did not start on a character 3075 // boundary and there is 3076 // empty space between the last field and this one, then we need 3077 // to emit an 3078 // anonymous member filling up the space up to its start. There 3079 // are three cases 3080 // here: 3081 // 3082 // 1 If the previous member ended on a character boundary, then 3083 // we can emit an 3084 // anonymous member starting at the most recent character 3085 // boundary. 3086 // 3087 // 2 If the previous member did not end on a character boundary 3088 // and the distance 3089 // from the end of the previous member to the current member 3090 // is less than a 3091 // word width, then we can emit an anonymous member starting 3092 // right after the 3093 // previous member and right before this member. 3094 // 3095 // 3 If the previous member did not end on a character boundary 3096 // and the distance 3097 // from the end of the previous member to the current member 3098 // is greater than 3099 // or equal a word width, then we act as in Case 1. 3100 3101 const uint64_t character_width = 8; 3102 const uint64_t word_width = 32; 3103 3104 // Objective-C has invalid DW_AT_bit_offset values in older 3105 // versions 3106 // of clang, so we have to be careful and only insert unnamed 3107 // bitfields 3108 // if we have a new enough clang. 3109 bool detect_unnamed_bitfields = true; 3110 3111 if (class_language == eLanguageTypeObjC || 3112 class_language == eLanguageTypeObjC_plus_plus) 3113 detect_unnamed_bitfields = 3114 die.GetCU()->Supports_unnamed_objc_bitfields(); 3115 3116 if (detect_unnamed_bitfields) { 3117 BitfieldInfo anon_field_info; 3118 3119 if ((this_field_info.bit_offset % character_width) != 3120 0) // not char aligned 3121 { 3122 uint64_t last_field_end = 0; 3123 3124 if (last_field_info.IsValid()) 3125 last_field_end = 3126 last_field_info.bit_offset + last_field_info.bit_size; 3127 3128 if (this_field_info.bit_offset != last_field_end) { 3129 if (((last_field_end % character_width) == 0) || // case 1 3130 (this_field_info.bit_offset - last_field_end >= 3131 word_width)) // case 3 3132 { 3133 anon_field_info.bit_size = 3134 this_field_info.bit_offset % character_width; 3135 anon_field_info.bit_offset = 3136 this_field_info.bit_offset - 3137 anon_field_info.bit_size; 3138 } else // case 2 3139 { 3140 anon_field_info.bit_size = 3141 this_field_info.bit_offset - last_field_end; 3142 anon_field_info.bit_offset = last_field_end; 3143 } 3144 } 3145 } 3146 3147 if (anon_field_info.IsValid()) { 3148 clang::FieldDecl *unnamed_bitfield_decl = 3149 ClangASTContext::AddFieldToRecordType( 3150 class_clang_type, NULL, 3151 m_ast.GetBuiltinTypeForEncodingAndBitSize( 3152 eEncodingSint, word_width), 3153 accessibility, anon_field_info.bit_size); 3154 3155 layout_info.field_offsets.insert(std::make_pair( 3156 unnamed_bitfield_decl, anon_field_info.bit_offset)); 3157 } 3158 } 3159 last_field_info = this_field_info; 3160 } else { 3161 last_field_info.Clear(); 3162 } 3163 3164 CompilerType member_clang_type = 3165 member_type->GetLayoutCompilerType(); 3166 if (!member_clang_type.IsCompleteType()) 3167 member_clang_type.GetCompleteType(); 3168 3169 { 3170 // Older versions of clang emit array[0] and array[1] in the 3171 // same way (<rdar://problem/12566646>). 3172 // If the current field is at the end of the structure, then 3173 // there is definitely no room for extra 3174 // elements and we override the type to array[0]. 3175 3176 CompilerType member_array_element_type; 3177 uint64_t member_array_size; 3178 bool member_array_is_incomplete; 3179 3180 if (member_clang_type.IsArrayType( 3181 &member_array_element_type, &member_array_size, 3182 &member_array_is_incomplete) && 3183 !member_array_is_incomplete) { 3184 uint64_t parent_byte_size = 3185 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 3186 UINT64_MAX); 3187 3188 if (member_byte_offset >= parent_byte_size) { 3189 if (member_array_size != 1 && 3190 (member_array_size != 0 || 3191 member_byte_offset > parent_byte_size)) { 3192 module_sp->ReportError( 3193 "0x%8.8" PRIx64 3194 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 3195 " which extends beyond the bounds of 0x%8.8" PRIx64, 3196 die.GetID(), name, encoding_form.Reference(), 3197 parent_die.GetID()); 3198 } 3199 3200 member_clang_type = m_ast.CreateArrayType( 3201 member_array_element_type, 0, false); 3202 } 3203 } 3204 } 3205 3206 if (ClangASTContext::IsCXXClassType(member_clang_type) && 3207 member_clang_type.GetCompleteType() == false) { 3208 if (die.GetCU()->GetProducer() == 3209 DWARFCompileUnit::eProducerClang) 3210 module_sp->ReportError( 3211 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3212 "0x%8.8x (%s) whose type is a forward declaration, not a " 3213 "complete definition.\nTry compiling the source file " 3214 "with -fstandalone-debug", 3215 parent_die.GetOffset(), parent_die.GetName(), 3216 die.GetOffset(), name); 3217 else 3218 module_sp->ReportError( 3219 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3220 "0x%8.8x (%s) whose type is a forward declaration, not a " 3221 "complete definition.\nPlease file a bug against the " 3222 "compiler and include the preprocessed output for %s", 3223 parent_die.GetOffset(), parent_die.GetName(), 3224 die.GetOffset(), name, 3225 sc.comp_unit ? sc.comp_unit->GetPath().c_str() 3226 : "the source file"); 3227 // We have no choice other than to pretend that the member class 3228 // is complete. If we don't do this, clang will crash when 3229 // trying 3230 // to layout the class. Since we provide layout assistance, all 3231 // ivars in this class and other classes will be fine, this is 3232 // the best we can do short of crashing. 3233 if (ClangASTContext::StartTagDeclarationDefinition( 3234 member_clang_type)) { 3235 ClangASTContext::CompleteTagDeclarationDefinition( 3236 member_clang_type); 3237 } else { 3238 module_sp->ReportError( 3239 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3240 "0x%8.8x (%s) whose type claims to be a C++ class but we " 3241 "were not able to start its definition.\nPlease file a " 3242 "bug and attach the file at the start of this error " 3243 "message", 3244 parent_die.GetOffset(), parent_die.GetName(), 3245 die.GetOffset(), name); 3246 } 3247 } 3248 3249 field_decl = ClangASTContext::AddFieldToRecordType( 3250 class_clang_type, name, member_clang_type, accessibility, 3251 bit_size); 3252 3253 m_ast.SetMetadataAsUserID(field_decl, die.GetID()); 3254 3255 layout_info.field_offsets.insert( 3256 std::make_pair(field_decl, field_bit_offset)); 3257 } else { 3258 if (name) 3259 module_sp->ReportError( 3260 "0x%8.8" PRIx64 3261 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 3262 " which was unable to be parsed", 3263 die.GetID(), name, encoding_form.Reference()); 3264 else 3265 module_sp->ReportError( 3266 "0x%8.8" PRIx64 3267 ": DW_TAG_member refers to type 0x%8.8" PRIx64 3268 " which was unable to be parsed", 3269 die.GetID(), encoding_form.Reference()); 3270 } 3271 } 3272 3273 if (prop_name != NULL && member_type) { 3274 clang::ObjCIvarDecl *ivar_decl = NULL; 3275 3276 if (field_decl) { 3277 ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl); 3278 assert(ivar_decl != NULL); 3279 } 3280 3281 ClangASTMetadata metadata; 3282 metadata.SetUserID(die.GetID()); 3283 delayed_properties.push_back(DelayedAddObjCClassProperty( 3284 class_clang_type, prop_name, 3285 member_type->GetLayoutCompilerType(), ivar_decl, 3286 prop_setter_name, prop_getter_name, prop_attributes, 3287 &metadata)); 3288 3289 if (ivar_decl) 3290 m_ast.SetMetadataAsUserID(ivar_decl, die.GetID()); 3291 } 3292 } 3293 } 3294 ++member_idx; 3295 } break; 3296 3297 case DW_TAG_subprogram: 3298 // Let the type parsing code handle this one for us. 3299 member_function_dies.Append(die); 3300 break; 3301 3302 case DW_TAG_inheritance: { 3303 is_a_class = true; 3304 if (default_accessibility == eAccessNone) 3305 default_accessibility = eAccessPrivate; 3306 // TODO: implement DW_TAG_inheritance type parsing 3307 DWARFAttributes attributes; 3308 const size_t num_attributes = die.GetAttributes(attributes); 3309 if (num_attributes > 0) { 3310 Declaration decl; 3311 DWARFExpression location(die.GetCU()); 3312 DWARFFormValue encoding_form; 3313 AccessType accessibility = default_accessibility; 3314 bool is_virtual = false; 3315 bool is_base_of_class = true; 3316 off_t member_byte_offset = 0; 3317 uint32_t i; 3318 for (i = 0; i < num_attributes; ++i) { 3319 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3320 DWARFFormValue form_value; 3321 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3322 switch (attr) { 3323 case DW_AT_decl_file: 3324 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 3325 form_value.Unsigned())); 3326 break; 3327 case DW_AT_decl_line: 3328 decl.SetLine(form_value.Unsigned()); 3329 break; 3330 case DW_AT_decl_column: 3331 decl.SetColumn(form_value.Unsigned()); 3332 break; 3333 case DW_AT_type: 3334 encoding_form = form_value; 3335 break; 3336 case DW_AT_data_member_location: 3337 if (form_value.BlockData()) { 3338 Value initialValue(0); 3339 Value memberOffset(0); 3340 const DWARFDataExtractor &debug_info_data = 3341 die.GetDWARF()->get_debug_info_data(); 3342 uint32_t block_length = form_value.Unsigned(); 3343 uint32_t block_offset = 3344 form_value.BlockData() - debug_info_data.GetDataStart(); 3345 if (DWARFExpression::Evaluate(nullptr, nullptr, module_sp, 3346 debug_info_data, die.GetCU(), 3347 block_offset, block_length, 3348 eRegisterKindDWARF, &initialValue, 3349 nullptr, memberOffset, nullptr)) { 3350 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 3351 } 3352 } else { 3353 // With DWARF 3 and later, if the value is an integer constant, 3354 // this form value is the offset in bytes from the beginning 3355 // of the containing entity. 3356 member_byte_offset = form_value.Unsigned(); 3357 } 3358 break; 3359 3360 case DW_AT_accessibility: 3361 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 3362 break; 3363 3364 case DW_AT_virtuality: 3365 is_virtual = form_value.Boolean(); 3366 break; 3367 3368 case DW_AT_sibling: 3369 break; 3370 3371 default: 3372 break; 3373 } 3374 } 3375 } 3376 3377 Type *base_class_type = die.ResolveTypeUID(DIERef(encoding_form)); 3378 if (base_class_type == NULL) { 3379 module_sp->ReportError("0x%8.8x: DW_TAG_inheritance failed to " 3380 "resolve the base class at 0x%8.8" PRIx64 3381 " from enclosing type 0x%8.8x. \nPlease file " 3382 "a bug and attach the file at the start of " 3383 "this error message", 3384 die.GetOffset(), encoding_form.Reference(), 3385 parent_die.GetOffset()); 3386 break; 3387 } 3388 3389 CompilerType base_class_clang_type = 3390 base_class_type->GetFullCompilerType(); 3391 assert(base_class_clang_type); 3392 if (class_language == eLanguageTypeObjC) { 3393 ast->SetObjCSuperClass(class_clang_type, base_class_clang_type); 3394 } else { 3395 base_classes.push_back(ast->CreateBaseClassSpecifier( 3396 base_class_clang_type.GetOpaqueQualType(), accessibility, 3397 is_virtual, is_base_of_class)); 3398 3399 if (is_virtual) { 3400 // Do not specify any offset for virtual inheritance. The DWARF 3401 // produced by clang doesn't 3402 // give us a constant offset, but gives us a DWARF expressions that 3403 // requires an actual object 3404 // in memory. the DW_AT_data_member_location for a virtual base 3405 // class looks like: 3406 // DW_AT_data_member_location( DW_OP_dup, DW_OP_deref, 3407 // DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref, 3408 // DW_OP_plus ) 3409 // Given this, there is really no valid response we can give to 3410 // clang for virtual base 3411 // class offsets, and this should eventually be removed from 3412 // LayoutRecordType() in the external 3413 // AST source in clang. 3414 } else { 3415 layout_info.base_offsets.insert(std::make_pair( 3416 ast->GetAsCXXRecordDecl( 3417 base_class_clang_type.GetOpaqueQualType()), 3418 clang::CharUnits::fromQuantity(member_byte_offset))); 3419 } 3420 } 3421 } 3422 } break; 3423 3424 default: 3425 break; 3426 } 3427 } 3428 3429 return true; 3430 } 3431 3432 size_t DWARFASTParserClang::ParseChildParameters( 3433 const SymbolContext &sc, clang::DeclContext *containing_decl_ctx, 3434 const DWARFDIE &parent_die, bool skip_artificial, bool &is_static, 3435 bool &is_variadic, bool &has_template_params, 3436 std::vector<CompilerType> &function_param_types, 3437 std::vector<clang::ParmVarDecl *> &function_param_decls, 3438 unsigned &type_quals) { 3439 if (!parent_die) 3440 return 0; 3441 3442 size_t arg_idx = 0; 3443 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 3444 die = die.GetSibling()) { 3445 const dw_tag_t tag = die.Tag(); 3446 switch (tag) { 3447 case DW_TAG_formal_parameter: { 3448 DWARFAttributes attributes; 3449 const size_t num_attributes = die.GetAttributes(attributes); 3450 if (num_attributes > 0) { 3451 const char *name = NULL; 3452 Declaration decl; 3453 DWARFFormValue param_type_die_form; 3454 bool is_artificial = false; 3455 // one of None, Auto, Register, Extern, Static, PrivateExtern 3456 3457 clang::StorageClass storage = clang::SC_None; 3458 uint32_t i; 3459 for (i = 0; i < num_attributes; ++i) { 3460 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3461 DWARFFormValue form_value; 3462 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3463 switch (attr) { 3464 case DW_AT_decl_file: 3465 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 3466 form_value.Unsigned())); 3467 break; 3468 case DW_AT_decl_line: 3469 decl.SetLine(form_value.Unsigned()); 3470 break; 3471 case DW_AT_decl_column: 3472 decl.SetColumn(form_value.Unsigned()); 3473 break; 3474 case DW_AT_name: 3475 name = form_value.AsCString(); 3476 break; 3477 case DW_AT_type: 3478 param_type_die_form = form_value; 3479 break; 3480 case DW_AT_artificial: 3481 is_artificial = form_value.Boolean(); 3482 break; 3483 case DW_AT_location: 3484 // if (form_value.BlockData()) 3485 // { 3486 // const DWARFDataExtractor& 3487 // debug_info_data = debug_info(); 3488 // uint32_t block_length = 3489 // form_value.Unsigned(); 3490 // DWARFDataExtractor 3491 // location(debug_info_data, 3492 // form_value.BlockData() - 3493 // debug_info_data.GetDataStart(), 3494 // block_length); 3495 // } 3496 // else 3497 // { 3498 // } 3499 // break; 3500 case DW_AT_const_value: 3501 case DW_AT_default_value: 3502 case DW_AT_description: 3503 case DW_AT_endianity: 3504 case DW_AT_is_optional: 3505 case DW_AT_segment: 3506 case DW_AT_variable_parameter: 3507 default: 3508 case DW_AT_abstract_origin: 3509 case DW_AT_sibling: 3510 break; 3511 } 3512 } 3513 } 3514 3515 bool skip = false; 3516 if (skip_artificial) { 3517 if (is_artificial) { 3518 // In order to determine if a C++ member function is 3519 // "const" we have to look at the const-ness of "this"... 3520 // Ugly, but that 3521 if (arg_idx == 0) { 3522 if (DeclKindIsCXXClass(containing_decl_ctx->getDeclKind())) { 3523 // Often times compilers omit the "this" name for the 3524 // specification DIEs, so we can't rely upon the name 3525 // being in the formal parameter DIE... 3526 if (name == NULL || ::strcmp(name, "this") == 0) { 3527 Type *this_type = 3528 die.ResolveTypeUID(DIERef(param_type_die_form)); 3529 if (this_type) { 3530 uint32_t encoding_mask = this_type->GetEncodingMask(); 3531 if (encoding_mask & Type::eEncodingIsPointerUID) { 3532 is_static = false; 3533 3534 if (encoding_mask & (1u << Type::eEncodingIsConstUID)) 3535 type_quals |= clang::Qualifiers::Const; 3536 if (encoding_mask & (1u << Type::eEncodingIsVolatileUID)) 3537 type_quals |= clang::Qualifiers::Volatile; 3538 } 3539 } 3540 } 3541 } 3542 } 3543 skip = true; 3544 } else { 3545 3546 // HACK: Objective C formal parameters "self" and "_cmd" 3547 // are not marked as artificial in the DWARF... 3548 CompileUnit *comp_unit = die.GetLLDBCompileUnit(); 3549 if (comp_unit) { 3550 switch (comp_unit->GetLanguage()) { 3551 case eLanguageTypeObjC: 3552 case eLanguageTypeObjC_plus_plus: 3553 if (name && name[0] && 3554 (strcmp(name, "self") == 0 || strcmp(name, "_cmd") == 0)) 3555 skip = true; 3556 break; 3557 default: 3558 break; 3559 } 3560 } 3561 } 3562 } 3563 3564 if (!skip) { 3565 Type *type = die.ResolveTypeUID(DIERef(param_type_die_form)); 3566 if (type) { 3567 function_param_types.push_back(type->GetForwardCompilerType()); 3568 3569 clang::ParmVarDecl *param_var_decl = 3570 m_ast.CreateParameterDeclaration( 3571 name, type->GetForwardCompilerType(), storage); 3572 assert(param_var_decl); 3573 function_param_decls.push_back(param_var_decl); 3574 3575 m_ast.SetMetadataAsUserID(param_var_decl, die.GetID()); 3576 } 3577 } 3578 } 3579 arg_idx++; 3580 } break; 3581 3582 case DW_TAG_unspecified_parameters: 3583 is_variadic = true; 3584 break; 3585 3586 case DW_TAG_template_type_parameter: 3587 case DW_TAG_template_value_parameter: 3588 case DW_TAG_GNU_template_parameter_pack: 3589 // The one caller of this was never using the template_param_infos, 3590 // and the local variable was taking up a large amount of stack space 3591 // in SymbolFileDWARF::ParseType() so this was removed. If we ever need 3592 // the template params back, we can add them back. 3593 // ParseTemplateDIE (dwarf_cu, die, template_param_infos); 3594 has_template_params = true; 3595 break; 3596 3597 default: 3598 break; 3599 } 3600 } 3601 return arg_idx; 3602 } 3603 3604 void DWARFASTParserClang::ParseChildArrayInfo( 3605 const SymbolContext &sc, const DWARFDIE &parent_die, int64_t &first_index, 3606 std::vector<uint64_t> &element_orders, uint32_t &byte_stride, 3607 uint32_t &bit_stride) { 3608 if (!parent_die) 3609 return; 3610 3611 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 3612 die = die.GetSibling()) { 3613 const dw_tag_t tag = die.Tag(); 3614 switch (tag) { 3615 case DW_TAG_subrange_type: { 3616 DWARFAttributes attributes; 3617 const size_t num_child_attributes = die.GetAttributes(attributes); 3618 if (num_child_attributes > 0) { 3619 uint64_t num_elements = 0; 3620 uint64_t lower_bound = 0; 3621 uint64_t upper_bound = 0; 3622 bool upper_bound_valid = false; 3623 uint32_t i; 3624 for (i = 0; i < num_child_attributes; ++i) { 3625 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3626 DWARFFormValue form_value; 3627 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3628 switch (attr) { 3629 case DW_AT_name: 3630 break; 3631 3632 case DW_AT_count: 3633 num_elements = form_value.Unsigned(); 3634 break; 3635 3636 case DW_AT_bit_stride: 3637 bit_stride = form_value.Unsigned(); 3638 break; 3639 3640 case DW_AT_byte_stride: 3641 byte_stride = form_value.Unsigned(); 3642 break; 3643 3644 case DW_AT_lower_bound: 3645 lower_bound = form_value.Unsigned(); 3646 break; 3647 3648 case DW_AT_upper_bound: 3649 upper_bound_valid = true; 3650 upper_bound = form_value.Unsigned(); 3651 break; 3652 3653 default: 3654 case DW_AT_abstract_origin: 3655 case DW_AT_accessibility: 3656 case DW_AT_allocated: 3657 case DW_AT_associated: 3658 case DW_AT_data_location: 3659 case DW_AT_declaration: 3660 case DW_AT_description: 3661 case DW_AT_sibling: 3662 case DW_AT_threads_scaled: 3663 case DW_AT_type: 3664 case DW_AT_visibility: 3665 break; 3666 } 3667 } 3668 } 3669 3670 if (num_elements == 0) { 3671 if (upper_bound_valid && upper_bound >= lower_bound) 3672 num_elements = upper_bound - lower_bound + 1; 3673 } 3674 3675 element_orders.push_back(num_elements); 3676 } 3677 } break; 3678 } 3679 } 3680 } 3681 3682 Type *DWARFASTParserClang::GetTypeForDIE(const DWARFDIE &die) { 3683 if (die) { 3684 SymbolFileDWARF *dwarf = die.GetDWARF(); 3685 DWARFAttributes attributes; 3686 const size_t num_attributes = die.GetAttributes(attributes); 3687 if (num_attributes > 0) { 3688 DWARFFormValue type_die_form; 3689 for (size_t i = 0; i < num_attributes; ++i) { 3690 dw_attr_t attr = attributes.AttributeAtIndex(i); 3691 DWARFFormValue form_value; 3692 3693 if (attr == DW_AT_type && 3694 attributes.ExtractFormValueAtIndex(i, form_value)) 3695 return dwarf->ResolveTypeUID(dwarf->GetDIE(DIERef(form_value)), true); 3696 } 3697 } 3698 } 3699 3700 return nullptr; 3701 } 3702 3703 clang::Decl *DWARFASTParserClang::GetClangDeclForDIE(const DWARFDIE &die) { 3704 if (!die) 3705 return nullptr; 3706 3707 switch (die.Tag()) { 3708 case DW_TAG_variable: 3709 case DW_TAG_constant: 3710 case DW_TAG_formal_parameter: 3711 case DW_TAG_imported_declaration: 3712 case DW_TAG_imported_module: 3713 break; 3714 default: 3715 return nullptr; 3716 } 3717 3718 DIEToDeclMap::iterator cache_pos = m_die_to_decl.find(die.GetDIE()); 3719 if (cache_pos != m_die_to_decl.end()) 3720 return cache_pos->second; 3721 3722 if (DWARFDIE spec_die = die.GetReferencedDIE(DW_AT_specification)) { 3723 clang::Decl *decl = GetClangDeclForDIE(spec_die); 3724 m_die_to_decl[die.GetDIE()] = decl; 3725 m_decl_to_die[decl].insert(die.GetDIE()); 3726 return decl; 3727 } 3728 3729 if (DWARFDIE abstract_origin_die = 3730 die.GetReferencedDIE(DW_AT_abstract_origin)) { 3731 clang::Decl *decl = GetClangDeclForDIE(abstract_origin_die); 3732 m_die_to_decl[die.GetDIE()] = decl; 3733 m_decl_to_die[decl].insert(die.GetDIE()); 3734 return decl; 3735 } 3736 3737 clang::Decl *decl = nullptr; 3738 switch (die.Tag()) { 3739 case DW_TAG_variable: 3740 case DW_TAG_constant: 3741 case DW_TAG_formal_parameter: { 3742 SymbolFileDWARF *dwarf = die.GetDWARF(); 3743 Type *type = GetTypeForDIE(die); 3744 if (dwarf && type) { 3745 const char *name = die.GetName(); 3746 clang::DeclContext *decl_context = 3747 ClangASTContext::DeclContextGetAsDeclContext( 3748 dwarf->GetDeclContextContainingUID(die.GetID())); 3749 decl = m_ast.CreateVariableDeclaration( 3750 decl_context, name, 3751 ClangUtil::GetQualType(type->GetForwardCompilerType())); 3752 } 3753 break; 3754 } 3755 case DW_TAG_imported_declaration: { 3756 SymbolFileDWARF *dwarf = die.GetDWARF(); 3757 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3758 if (imported_uid) { 3759 CompilerDecl imported_decl = imported_uid.GetDecl(); 3760 if (imported_decl) { 3761 clang::DeclContext *decl_context = 3762 ClangASTContext::DeclContextGetAsDeclContext( 3763 dwarf->GetDeclContextContainingUID(die.GetID())); 3764 if (clang::NamedDecl *clang_imported_decl = 3765 llvm::dyn_cast<clang::NamedDecl>( 3766 (clang::Decl *)imported_decl.GetOpaqueDecl())) 3767 decl = 3768 m_ast.CreateUsingDeclaration(decl_context, clang_imported_decl); 3769 } 3770 } 3771 break; 3772 } 3773 case DW_TAG_imported_module: { 3774 SymbolFileDWARF *dwarf = die.GetDWARF(); 3775 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3776 3777 if (imported_uid) { 3778 CompilerDeclContext imported_decl_ctx = imported_uid.GetDeclContext(); 3779 if (imported_decl_ctx) { 3780 clang::DeclContext *decl_context = 3781 ClangASTContext::DeclContextGetAsDeclContext( 3782 dwarf->GetDeclContextContainingUID(die.GetID())); 3783 if (clang::NamespaceDecl *ns_decl = 3784 ClangASTContext::DeclContextGetAsNamespaceDecl( 3785 imported_decl_ctx)) 3786 decl = m_ast.CreateUsingDirectiveDeclaration(decl_context, ns_decl); 3787 } 3788 } 3789 break; 3790 } 3791 default: 3792 break; 3793 } 3794 3795 m_die_to_decl[die.GetDIE()] = decl; 3796 m_decl_to_die[decl].insert(die.GetDIE()); 3797 3798 return decl; 3799 } 3800 3801 clang::DeclContext * 3802 DWARFASTParserClang::GetClangDeclContextForDIE(const DWARFDIE &die) { 3803 if (die) { 3804 clang::DeclContext *decl_ctx = GetCachedClangDeclContextForDIE(die); 3805 if (decl_ctx) 3806 return decl_ctx; 3807 3808 bool try_parsing_type = true; 3809 switch (die.Tag()) { 3810 case DW_TAG_compile_unit: 3811 decl_ctx = m_ast.GetTranslationUnitDecl(); 3812 try_parsing_type = false; 3813 break; 3814 3815 case DW_TAG_namespace: 3816 decl_ctx = ResolveNamespaceDIE(die); 3817 try_parsing_type = false; 3818 break; 3819 3820 case DW_TAG_lexical_block: 3821 decl_ctx = GetDeclContextForBlock(die); 3822 try_parsing_type = false; 3823 break; 3824 3825 default: 3826 break; 3827 } 3828 3829 if (decl_ctx == nullptr && try_parsing_type) { 3830 Type *type = die.GetDWARF()->ResolveType(die); 3831 if (type) 3832 decl_ctx = GetCachedClangDeclContextForDIE(die); 3833 } 3834 3835 if (decl_ctx) { 3836 LinkDeclContextToDIE(decl_ctx, die); 3837 return decl_ctx; 3838 } 3839 } 3840 return nullptr; 3841 } 3842 3843 static bool IsSubroutine(const DWARFDIE &die) { 3844 switch (die.Tag()) { 3845 case DW_TAG_subprogram: 3846 case DW_TAG_inlined_subroutine: 3847 return true; 3848 default: 3849 return false; 3850 } 3851 } 3852 3853 static DWARFDIE GetContainingFunctionWithAbstractOrigin(const DWARFDIE &die) { 3854 for (DWARFDIE candidate = die; candidate; candidate = candidate.GetParent()) { 3855 if (IsSubroutine(candidate)) { 3856 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3857 return candidate; 3858 } else { 3859 return DWARFDIE(); 3860 } 3861 } 3862 } 3863 assert(0 && "Shouldn't call GetContainingFunctionWithAbstractOrigin on " 3864 "something not in a function"); 3865 return DWARFDIE(); 3866 } 3867 3868 static DWARFDIE FindAnyChildWithAbstractOrigin(const DWARFDIE &context) { 3869 for (DWARFDIE candidate = context.GetFirstChild(); candidate.IsValid(); 3870 candidate = candidate.GetSibling()) { 3871 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3872 return candidate; 3873 } 3874 } 3875 return DWARFDIE(); 3876 } 3877 3878 static DWARFDIE FindFirstChildWithAbstractOrigin(const DWARFDIE &block, 3879 const DWARFDIE &function) { 3880 assert(IsSubroutine(function)); 3881 for (DWARFDIE context = block; context != function.GetParent(); 3882 context = context.GetParent()) { 3883 assert(!IsSubroutine(context) || context == function); 3884 if (DWARFDIE child = FindAnyChildWithAbstractOrigin(context)) { 3885 return child; 3886 } 3887 } 3888 return DWARFDIE(); 3889 } 3890 3891 clang::DeclContext * 3892 DWARFASTParserClang::GetDeclContextForBlock(const DWARFDIE &die) { 3893 assert(die.Tag() == DW_TAG_lexical_block); 3894 DWARFDIE containing_function_with_abstract_origin = 3895 GetContainingFunctionWithAbstractOrigin(die); 3896 if (!containing_function_with_abstract_origin) { 3897 return (clang::DeclContext *)ResolveBlockDIE(die); 3898 } 3899 DWARFDIE child = FindFirstChildWithAbstractOrigin( 3900 die, containing_function_with_abstract_origin); 3901 CompilerDeclContext decl_context = 3902 GetDeclContextContainingUIDFromDWARF(child); 3903 return (clang::DeclContext *)decl_context.GetOpaqueDeclContext(); 3904 } 3905 3906 clang::BlockDecl *DWARFASTParserClang::ResolveBlockDIE(const DWARFDIE &die) { 3907 if (die && die.Tag() == DW_TAG_lexical_block) { 3908 clang::BlockDecl *decl = 3909 llvm::cast_or_null<clang::BlockDecl>(m_die_to_decl_ctx[die.GetDIE()]); 3910 3911 if (!decl) { 3912 DWARFDIE decl_context_die; 3913 clang::DeclContext *decl_context = 3914 GetClangDeclContextContainingDIE(die, &decl_context_die); 3915 decl = m_ast.CreateBlockDeclaration(decl_context); 3916 3917 if (decl) 3918 LinkDeclContextToDIE((clang::DeclContext *)decl, die); 3919 } 3920 3921 return decl; 3922 } 3923 return nullptr; 3924 } 3925 3926 clang::NamespaceDecl * 3927 DWARFASTParserClang::ResolveNamespaceDIE(const DWARFDIE &die) { 3928 if (die && die.Tag() == DW_TAG_namespace) { 3929 // See if we already parsed this namespace DIE and associated it with a 3930 // uniqued namespace declaration 3931 clang::NamespaceDecl *namespace_decl = 3932 static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die.GetDIE()]); 3933 if (namespace_decl) 3934 return namespace_decl; 3935 else { 3936 const char *namespace_name = die.GetName(); 3937 clang::DeclContext *containing_decl_ctx = 3938 GetClangDeclContextContainingDIE(die, nullptr); 3939 namespace_decl = m_ast.GetUniqueNamespaceDeclaration(namespace_name, 3940 containing_decl_ctx); 3941 Log *log = 3942 nullptr; // (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 3943 if (log) { 3944 SymbolFileDWARF *dwarf = die.GetDWARF(); 3945 if (namespace_name) { 3946 dwarf->GetObjectFile()->GetModule()->LogMessage( 3947 log, "ASTContext => %p: 0x%8.8" PRIx64 3948 ": DW_TAG_namespace with DW_AT_name(\"%s\") => " 3949 "clang::NamespaceDecl *%p (original = %p)", 3950 static_cast<void *>(m_ast.getASTContext()), die.GetID(), 3951 namespace_name, static_cast<void *>(namespace_decl), 3952 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3953 } else { 3954 dwarf->GetObjectFile()->GetModule()->LogMessage( 3955 log, "ASTContext => %p: 0x%8.8" PRIx64 3956 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p " 3957 "(original = %p)", 3958 static_cast<void *>(m_ast.getASTContext()), die.GetID(), 3959 static_cast<void *>(namespace_decl), 3960 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3961 } 3962 } 3963 3964 if (namespace_decl) 3965 LinkDeclContextToDIE((clang::DeclContext *)namespace_decl, die); 3966 return namespace_decl; 3967 } 3968 } 3969 return nullptr; 3970 } 3971 3972 clang::DeclContext *DWARFASTParserClang::GetClangDeclContextContainingDIE( 3973 const DWARFDIE &die, DWARFDIE *decl_ctx_die_copy) { 3974 SymbolFileDWARF *dwarf = die.GetDWARF(); 3975 3976 DWARFDIE decl_ctx_die = dwarf->GetDeclContextDIEContainingDIE(die); 3977 3978 if (decl_ctx_die_copy) 3979 *decl_ctx_die_copy = decl_ctx_die; 3980 3981 if (decl_ctx_die) { 3982 clang::DeclContext *clang_decl_ctx = 3983 GetClangDeclContextForDIE(decl_ctx_die); 3984 if (clang_decl_ctx) 3985 return clang_decl_ctx; 3986 } 3987 return m_ast.GetTranslationUnitDecl(); 3988 } 3989 3990 clang::DeclContext * 3991 DWARFASTParserClang::GetCachedClangDeclContextForDIE(const DWARFDIE &die) { 3992 if (die) { 3993 DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find(die.GetDIE()); 3994 if (pos != m_die_to_decl_ctx.end()) 3995 return pos->second; 3996 } 3997 return nullptr; 3998 } 3999 4000 void DWARFASTParserClang::LinkDeclContextToDIE(clang::DeclContext *decl_ctx, 4001 const DWARFDIE &die) { 4002 m_die_to_decl_ctx[die.GetDIE()] = decl_ctx; 4003 // There can be many DIEs for a single decl context 4004 // m_decl_ctx_to_die[decl_ctx].insert(die.GetDIE()); 4005 m_decl_ctx_to_die.insert(std::make_pair(decl_ctx, die)); 4006 } 4007 4008 bool DWARFASTParserClang::CopyUniqueClassMethodTypes( 4009 const DWARFDIE &src_class_die, const DWARFDIE &dst_class_die, 4010 lldb_private::Type *class_type, DWARFDIECollection &failures) { 4011 if (!class_type || !src_class_die || !dst_class_die) 4012 return false; 4013 if (src_class_die.Tag() != dst_class_die.Tag()) 4014 return false; 4015 4016 // We need to complete the class type so we can get all of the method types 4017 // parsed so we can then unique those types to their equivalent counterparts 4018 // in "dst_cu" and "dst_class_die" 4019 class_type->GetFullCompilerType(); 4020 4021 DWARFDIE src_die; 4022 DWARFDIE dst_die; 4023 UniqueCStringMap<DWARFDIE> src_name_to_die; 4024 UniqueCStringMap<DWARFDIE> dst_name_to_die; 4025 UniqueCStringMap<DWARFDIE> src_name_to_die_artificial; 4026 UniqueCStringMap<DWARFDIE> dst_name_to_die_artificial; 4027 for (src_die = src_class_die.GetFirstChild(); src_die.IsValid(); 4028 src_die = src_die.GetSibling()) { 4029 if (src_die.Tag() == DW_TAG_subprogram) { 4030 // Make sure this is a declaration and not a concrete instance by looking 4031 // for DW_AT_declaration set to 1. Sometimes concrete function instances 4032 // are placed inside the class definitions and shouldn't be included in 4033 // the list of things are are tracking here. 4034 if (src_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 4035 const char *src_name = src_die.GetMangledName(); 4036 if (src_name) { 4037 ConstString src_const_name(src_name); 4038 if (src_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 4039 src_name_to_die_artificial.Append(src_const_name, src_die); 4040 else 4041 src_name_to_die.Append(src_const_name, src_die); 4042 } 4043 } 4044 } 4045 } 4046 for (dst_die = dst_class_die.GetFirstChild(); dst_die.IsValid(); 4047 dst_die = dst_die.GetSibling()) { 4048 if (dst_die.Tag() == DW_TAG_subprogram) { 4049 // Make sure this is a declaration and not a concrete instance by looking 4050 // for DW_AT_declaration set to 1. Sometimes concrete function instances 4051 // are placed inside the class definitions and shouldn't be included in 4052 // the list of things are are tracking here. 4053 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 4054 const char *dst_name = dst_die.GetMangledName(); 4055 if (dst_name) { 4056 ConstString dst_const_name(dst_name); 4057 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 4058 dst_name_to_die_artificial.Append(dst_const_name, dst_die); 4059 else 4060 dst_name_to_die.Append(dst_const_name, dst_die); 4061 } 4062 } 4063 } 4064 } 4065 const uint32_t src_size = src_name_to_die.GetSize(); 4066 const uint32_t dst_size = dst_name_to_die.GetSize(); 4067 Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | 4068 // DWARF_LOG_TYPE_COMPLETION)); 4069 4070 // Is everything kosher so we can go through the members at top speed? 4071 bool fast_path = true; 4072 4073 if (src_size != dst_size) { 4074 if (src_size != 0 && dst_size != 0) { 4075 if (log) 4076 log->Printf("warning: trying to unique class DIE 0x%8.8x to 0x%8.8x, " 4077 "but they didn't have the same size (src=%d, dst=%d)", 4078 src_class_die.GetOffset(), dst_class_die.GetOffset(), 4079 src_size, dst_size); 4080 } 4081 4082 fast_path = false; 4083 } 4084 4085 uint32_t idx; 4086 4087 if (fast_path) { 4088 for (idx = 0; idx < src_size; ++idx) { 4089 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 4090 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 4091 4092 if (src_die.Tag() != dst_die.Tag()) { 4093 if (log) 4094 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 4095 "but 0x%8.8x (%s) tags didn't match 0x%8.8x (%s)", 4096 src_class_die.GetOffset(), dst_class_die.GetOffset(), 4097 src_die.GetOffset(), src_die.GetTagAsCString(), 4098 dst_die.GetOffset(), dst_die.GetTagAsCString()); 4099 fast_path = false; 4100 } 4101 4102 const char *src_name = src_die.GetMangledName(); 4103 const char *dst_name = dst_die.GetMangledName(); 4104 4105 // Make sure the names match 4106 if (src_name == dst_name || (strcmp(src_name, dst_name) == 0)) 4107 continue; 4108 4109 if (log) 4110 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 4111 "but 0x%8.8x (%s) names didn't match 0x%8.8x (%s)", 4112 src_class_die.GetOffset(), dst_class_die.GetOffset(), 4113 src_die.GetOffset(), src_name, dst_die.GetOffset(), 4114 dst_name); 4115 4116 fast_path = false; 4117 } 4118 } 4119 4120 DWARFASTParserClang *src_dwarf_ast_parser = 4121 (DWARFASTParserClang *)src_die.GetDWARFParser(); 4122 DWARFASTParserClang *dst_dwarf_ast_parser = 4123 (DWARFASTParserClang *)dst_die.GetDWARFParser(); 4124 4125 // Now do the work of linking the DeclContexts and Types. 4126 if (fast_path) { 4127 // We can do this quickly. Just run across the tables index-for-index since 4128 // we know each node has matching names and tags. 4129 for (idx = 0; idx < src_size; ++idx) { 4130 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 4131 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 4132 4133 clang::DeclContext *src_decl_ctx = 4134 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4135 if (src_decl_ctx) { 4136 if (log) 4137 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4138 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 4139 dst_die.GetOffset()); 4140 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 4141 } else { 4142 if (log) 4143 log->Printf("warning: tried to unique decl context from 0x%8.8x for " 4144 "0x%8.8x, but none was found", 4145 src_die.GetOffset(), dst_die.GetOffset()); 4146 } 4147 4148 Type *src_child_type = 4149 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4150 if (src_child_type) { 4151 if (log) 4152 log->Printf( 4153 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 4154 static_cast<void *>(src_child_type), src_child_type->GetID(), 4155 src_die.GetOffset(), dst_die.GetOffset()); 4156 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 4157 } else { 4158 if (log) 4159 log->Printf("warning: tried to unique lldb_private::Type from " 4160 "0x%8.8x for 0x%8.8x, but none was found", 4161 src_die.GetOffset(), dst_die.GetOffset()); 4162 } 4163 } 4164 } else { 4165 // We must do this slowly. For each member of the destination, look 4166 // up a member in the source with the same name, check its tag, and 4167 // unique them if everything matches up. Report failures. 4168 4169 if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty()) { 4170 src_name_to_die.Sort(); 4171 4172 for (idx = 0; idx < dst_size; ++idx) { 4173 ConstString dst_name = dst_name_to_die.GetCStringAtIndex(idx); 4174 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 4175 src_die = src_name_to_die.Find(dst_name, DWARFDIE()); 4176 4177 if (src_die && (src_die.Tag() == dst_die.Tag())) { 4178 clang::DeclContext *src_decl_ctx = 4179 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4180 if (src_decl_ctx) { 4181 if (log) 4182 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4183 static_cast<void *>(src_decl_ctx), 4184 src_die.GetOffset(), dst_die.GetOffset()); 4185 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 4186 } else { 4187 if (log) 4188 log->Printf("warning: tried to unique decl context from 0x%8.8x " 4189 "for 0x%8.8x, but none was found", 4190 src_die.GetOffset(), dst_die.GetOffset()); 4191 } 4192 4193 Type *src_child_type = 4194 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4195 if (src_child_type) { 4196 if (log) 4197 log->Printf("uniquing type %p (uid=0x%" PRIx64 4198 ") from 0x%8.8x for 0x%8.8x", 4199 static_cast<void *>(src_child_type), 4200 src_child_type->GetID(), src_die.GetOffset(), 4201 dst_die.GetOffset()); 4202 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = 4203 src_child_type; 4204 } else { 4205 if (log) 4206 log->Printf("warning: tried to unique lldb_private::Type from " 4207 "0x%8.8x for 0x%8.8x, but none was found", 4208 src_die.GetOffset(), dst_die.GetOffset()); 4209 } 4210 } else { 4211 if (log) 4212 log->Printf("warning: couldn't find a match for 0x%8.8x", 4213 dst_die.GetOffset()); 4214 4215 failures.Append(dst_die); 4216 } 4217 } 4218 } 4219 } 4220 4221 const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize(); 4222 const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize(); 4223 4224 if (src_size_artificial && dst_size_artificial) { 4225 dst_name_to_die_artificial.Sort(); 4226 4227 for (idx = 0; idx < src_size_artificial; ++idx) { 4228 ConstString src_name_artificial = 4229 src_name_to_die_artificial.GetCStringAtIndex(idx); 4230 src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 4231 dst_die = 4232 dst_name_to_die_artificial.Find(src_name_artificial, DWARFDIE()); 4233 4234 if (dst_die) { 4235 // Both classes have the artificial types, link them 4236 clang::DeclContext *src_decl_ctx = 4237 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4238 if (src_decl_ctx) { 4239 if (log) 4240 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4241 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 4242 dst_die.GetOffset()); 4243 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 4244 } else { 4245 if (log) 4246 log->Printf("warning: tried to unique decl context from 0x%8.8x " 4247 "for 0x%8.8x, but none was found", 4248 src_die.GetOffset(), dst_die.GetOffset()); 4249 } 4250 4251 Type *src_child_type = 4252 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4253 if (src_child_type) { 4254 if (log) 4255 log->Printf( 4256 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 4257 static_cast<void *>(src_child_type), src_child_type->GetID(), 4258 src_die.GetOffset(), dst_die.GetOffset()); 4259 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 4260 } else { 4261 if (log) 4262 log->Printf("warning: tried to unique lldb_private::Type from " 4263 "0x%8.8x for 0x%8.8x, but none was found", 4264 src_die.GetOffset(), dst_die.GetOffset()); 4265 } 4266 } 4267 } 4268 } 4269 4270 if (dst_size_artificial) { 4271 for (idx = 0; idx < dst_size_artificial; ++idx) { 4272 ConstString dst_name_artificial = 4273 dst_name_to_die_artificial.GetCStringAtIndex(idx); 4274 dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 4275 if (log) 4276 log->Printf("warning: need to create artificial method for 0x%8.8x for " 4277 "method '%s'", 4278 dst_die.GetOffset(), dst_name_artificial.GetCString()); 4279 4280 failures.Append(dst_die); 4281 } 4282 } 4283 4284 return (failures.Size() != 0); 4285 } 4286