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 "DWARFASTParserClang.h" 11 #include "DWARFCompileUnit.h" 12 #include "DWARFDebugInfo.h" 13 #include "DWARFDeclContext.h" 14 #include "DWARFDefines.h" 15 #include "DWARFDIE.h" 16 #include "DWARFDIECollection.h" 17 #include "SymbolFileDWARF.h" 18 #include "SymbolFileDWARFDebugMap.h" 19 #include "UniqueDWARFASTType.h" 20 21 #include "Plugins/Language/ObjC/ObjCLanguage.h" 22 #include "lldb/Core/Log.h" 23 #include "lldb/Core/Module.h" 24 #include "lldb/Core/StreamString.h" 25 #include "lldb/Core/Value.h" 26 #include "lldb/Host/Host.h" 27 #include "lldb/Interpreter/Args.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 40 #include "clang/AST/DeclCXX.h" 41 #include "clang/AST/DeclObjC.h" 42 43 #include <map> 44 #include <vector> 45 46 //#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN 47 48 #ifdef ENABLE_DEBUG_PRINTF 49 #include <stdio.h> 50 #define DEBUG_PRINTF(fmt, ...) printf(fmt, __VA_ARGS__) 51 #else 52 #define DEBUG_PRINTF(fmt, ...) 53 #endif 54 55 56 using namespace lldb; 57 using namespace lldb_private; 58 DWARFASTParserClang::DWARFASTParserClang (ClangASTContext &ast) : 59 m_ast (ast), 60 m_die_to_decl_ctx (), 61 m_decl_ctx_to_die () 62 { 63 } 64 65 DWARFASTParserClang::~DWARFASTParserClang () 66 { 67 } 68 69 70 static AccessType 71 DW_ACCESS_to_AccessType (uint32_t dwarf_accessibility) 72 { 73 switch (dwarf_accessibility) 74 { 75 case DW_ACCESS_public: return eAccessPublic; 76 case DW_ACCESS_private: return eAccessPrivate; 77 case DW_ACCESS_protected: return eAccessProtected; 78 default: break; 79 } 80 return eAccessNone; 81 } 82 83 static bool 84 DeclKindIsCXXClass (clang::Decl::Kind decl_kind) 85 { 86 switch (decl_kind) 87 { 88 case clang::Decl::CXXRecord: 89 case clang::Decl::ClassTemplateSpecialization: 90 return true; 91 default: 92 break; 93 } 94 return false; 95 } 96 97 struct BitfieldInfo 98 { 99 uint64_t bit_size; 100 uint64_t bit_offset; 101 102 BitfieldInfo () : 103 bit_size (LLDB_INVALID_ADDRESS), 104 bit_offset (LLDB_INVALID_ADDRESS) 105 { 106 } 107 108 void 109 Clear() 110 { 111 bit_size = LLDB_INVALID_ADDRESS; 112 bit_offset = LLDB_INVALID_ADDRESS; 113 } 114 115 bool IsValid () 116 { 117 return (bit_size != LLDB_INVALID_ADDRESS) && 118 (bit_offset != LLDB_INVALID_ADDRESS); 119 } 120 }; 121 122 123 ClangASTImporter & 124 DWARFASTParserClang::GetClangASTImporter() 125 { 126 if (!m_clang_ast_importer_ap) 127 { 128 m_clang_ast_importer_ap.reset (new ClangASTImporter); 129 } 130 return *m_clang_ast_importer_ap; 131 } 132 133 134 TypeSP 135 DWARFASTParserClang::ParseTypeFromDWO (const DWARFDIE &die, Log *log) 136 { 137 ModuleSP dwo_module_sp = die.GetContainingDWOModule(); 138 if (dwo_module_sp) 139 { 140 // This type comes from an external DWO module 141 std::vector<CompilerContext> dwo_context; 142 die.GetDWOContext(dwo_context); 143 TypeMap dwo_types; 144 if (dwo_module_sp->GetSymbolVendor()->FindTypes(dwo_context, true, dwo_types)) 145 { 146 const size_t num_dwo_types = dwo_types.GetSize(); 147 if (num_dwo_types == 1) 148 { 149 // We found a real definition for this type elsewhere 150 // so lets use it and cache the fact that we found 151 // a complete type for this die 152 TypeSP dwo_type_sp = dwo_types.GetTypeAtIndex(0); 153 if (dwo_type_sp) 154 { 155 lldb_private::CompilerType dwo_type = dwo_type_sp->GetForwardCompilerType(); 156 157 lldb_private::CompilerType type = GetClangASTImporter().CopyType (m_ast, dwo_type); 158 159 //printf ("copied_qual_type: ast = %p, clang_type = %p, name = '%s'\n", m_ast, copied_qual_type.getAsOpaquePtr(), external_type->GetName().GetCString()); 160 if (type) 161 { 162 SymbolFileDWARF *dwarf = die.GetDWARF(); 163 TypeSP type_sp (new Type (die.GetID(), 164 dwarf, 165 dwo_type_sp->GetName(), 166 dwo_type_sp->GetByteSize(), 167 NULL, 168 LLDB_INVALID_UID, 169 Type::eEncodingInvalid, 170 &dwo_type_sp->GetDeclaration(), 171 type, 172 Type::eResolveStateForward)); 173 174 dwarf->GetTypeList()->Insert(type_sp); 175 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 176 clang::TagDecl *tag_decl = ClangASTContext::GetAsTagDecl(type); 177 if (tag_decl) 178 LinkDeclContextToDIE(tag_decl, die); 179 else 180 { 181 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE(die); 182 if (defn_decl_ctx) 183 LinkDeclContextToDIE(defn_decl_ctx, die); 184 } 185 return type_sp; 186 } 187 } 188 } 189 } 190 } 191 return TypeSP(); 192 } 193 194 TypeSP 195 DWARFASTParserClang::ParseTypeFromDWARF (const SymbolContext& sc, 196 const DWARFDIE &die, 197 Log *log, 198 bool *type_is_new_ptr) 199 { 200 TypeSP type_sp; 201 202 if (type_is_new_ptr) 203 *type_is_new_ptr = false; 204 205 AccessType accessibility = eAccessNone; 206 if (die) 207 { 208 SymbolFileDWARF *dwarf = die.GetDWARF(); 209 if (log) 210 { 211 DWARFDIE context_die; 212 clang::DeclContext *context = GetClangDeclContextContainingDIE (die, &context_die); 213 214 dwarf->GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x, decl_ctx = %p (die 0x%8.8x)) %s name = '%s')", 215 die.GetOffset(), 216 static_cast<void*>(context), 217 context_die.GetOffset(), 218 die.GetTagAsCString(), 219 die.GetName()); 220 221 } 222 // 223 // Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 224 // if (log && dwarf_cu) 225 // { 226 // StreamString s; 227 // die->DumpLocation (this, dwarf_cu, s); 228 // dwarf->GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDwarf::%s %s", __FUNCTION__, s.GetData()); 229 // 230 // } 231 232 Type *type_ptr = dwarf->GetDIEToType().lookup (die.GetDIE()); 233 TypeList* type_list = dwarf->GetTypeList(); 234 if (type_ptr == NULL) 235 { 236 if (type_is_new_ptr) 237 *type_is_new_ptr = true; 238 239 const dw_tag_t tag = die.Tag(); 240 241 bool is_forward_declaration = false; 242 DWARFAttributes attributes; 243 const char *type_name_cstr = NULL; 244 ConstString type_name_const_str; 245 Type::ResolveState resolve_state = Type::eResolveStateUnresolved; 246 uint64_t byte_size = 0; 247 Declaration decl; 248 249 Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID; 250 CompilerType clang_type; 251 DWARFFormValue form_value; 252 253 dw_attr_t attr; 254 255 switch (tag) 256 { 257 case DW_TAG_typedef: 258 // Try to parse a typedef from the DWO file first as modules 259 // can contain typedef'ed structures that have no names like: 260 // 261 // typedef struct { int a; } Foo; 262 // 263 // In this case we will have a structure with no name and a 264 // typedef named "Foo" that points to this unnamed structure. 265 // The name in the typedef is the only identifier for the struct, 266 // so always try to get typedefs from DWO files if possible. 267 // 268 // The type_sp returned will be empty if the typedef doesn't exist 269 // in a DWO file, so it is cheap to call this function just to check. 270 // 271 // If we don't do this we end up creating a TypeSP that says this 272 // is a typedef to type 0x123 (the DW_AT_type value would be 0x123 273 // in the DW_TAG_typedef), and this is the unnamed structure type. 274 // We will have a hard time tracking down an unnammed structure 275 // type in the module DWO file, so we make sure we don't get into 276 // this situation by always resolving typedefs from the DWO file. 277 type_sp = ParseTypeFromDWO(die, log); 278 if (type_sp) 279 return type_sp; 280 281 LLVM_FALLTHROUGH; 282 case DW_TAG_base_type: 283 case DW_TAG_pointer_type: 284 case DW_TAG_reference_type: 285 case DW_TAG_rvalue_reference_type: 286 case DW_TAG_const_type: 287 case DW_TAG_restrict_type: 288 case DW_TAG_volatile_type: 289 case DW_TAG_unspecified_type: 290 { 291 // Set a bit that lets us know that we are currently parsing this 292 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 293 294 const size_t num_attributes = die.GetAttributes (attributes); 295 uint32_t encoding = 0; 296 DWARFFormValue encoding_uid; 297 298 if (num_attributes > 0) 299 { 300 uint32_t i; 301 for (i=0; i<num_attributes; ++i) 302 { 303 attr = attributes.AttributeAtIndex(i); 304 if (attributes.ExtractFormValueAtIndex(i, form_value)) 305 { 306 switch (attr) 307 { 308 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 309 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 310 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 311 case DW_AT_name: 312 313 type_name_cstr = form_value.AsCString(); 314 // Work around a bug in llvm-gcc where they give a name to a reference type which doesn't 315 // include the "&"... 316 if (tag == DW_TAG_reference_type) 317 { 318 if (strchr (type_name_cstr, '&') == NULL) 319 type_name_cstr = NULL; 320 } 321 if (type_name_cstr) 322 type_name_const_str.SetCString(type_name_cstr); 323 break; 324 case DW_AT_byte_size: byte_size = form_value.Unsigned(); break; 325 case DW_AT_encoding: encoding = form_value.Unsigned(); break; 326 case DW_AT_type: encoding_uid = form_value; break; 327 default: 328 case DW_AT_sibling: 329 break; 330 } 331 } 332 } 333 } 334 335 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\") type => 0x%8.8lx\n", die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr, encoding_uid.Reference()); 336 337 switch (tag) 338 { 339 default: 340 break; 341 342 case DW_TAG_unspecified_type: 343 if (strcmp(type_name_cstr, "nullptr_t") == 0 || 344 strcmp(type_name_cstr, "decltype(nullptr)") == 0 ) 345 { 346 resolve_state = Type::eResolveStateFull; 347 clang_type = m_ast.GetBasicType(eBasicTypeNullPtr); 348 break; 349 } 350 // Fall through to base type below in case we can handle the type there... 351 LLVM_FALLTHROUGH; 352 353 case DW_TAG_base_type: 354 resolve_state = Type::eResolveStateFull; 355 clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize (type_name_cstr, 356 encoding, 357 byte_size * 8); 358 break; 359 360 case DW_TAG_pointer_type: encoding_data_type = Type::eEncodingIsPointerUID; break; 361 case DW_TAG_reference_type: encoding_data_type = Type::eEncodingIsLValueReferenceUID; break; 362 case DW_TAG_rvalue_reference_type: encoding_data_type = Type::eEncodingIsRValueReferenceUID; break; 363 case DW_TAG_typedef: encoding_data_type = Type::eEncodingIsTypedefUID; break; 364 case DW_TAG_const_type: encoding_data_type = Type::eEncodingIsConstUID; break; 365 case DW_TAG_restrict_type: encoding_data_type = Type::eEncodingIsRestrictUID; break; 366 case DW_TAG_volatile_type: encoding_data_type = Type::eEncodingIsVolatileUID; break; 367 } 368 369 if (!clang_type && (encoding_data_type == Type::eEncodingIsPointerUID || encoding_data_type == Type::eEncodingIsTypedefUID) && sc.comp_unit != NULL) 370 { 371 bool translation_unit_is_objc = (sc.comp_unit->GetLanguage() == eLanguageTypeObjC || sc.comp_unit->GetLanguage() == eLanguageTypeObjC_plus_plus); 372 373 if (translation_unit_is_objc) 374 { 375 if (type_name_cstr != NULL) 376 { 377 static ConstString g_objc_type_name_id("id"); 378 static ConstString g_objc_type_name_Class("Class"); 379 static ConstString g_objc_type_name_selector("SEL"); 380 381 if (type_name_const_str == g_objc_type_name_id) 382 { 383 if (log) 384 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 385 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'id' built-in type.", 386 die.GetOffset(), 387 die.GetTagAsCString(), 388 die.GetName()); 389 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 390 encoding_data_type = Type::eEncodingIsUID; 391 encoding_uid.Clear(); 392 resolve_state = Type::eResolveStateFull; 393 394 } 395 else if (type_name_const_str == g_objc_type_name_Class) 396 { 397 if (log) 398 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 399 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'Class' built-in type.", 400 die.GetOffset(), 401 die.GetTagAsCString(), 402 die.GetName()); 403 clang_type = m_ast.GetBasicType(eBasicTypeObjCClass); 404 encoding_data_type = Type::eEncodingIsUID; 405 encoding_uid.Clear(); 406 resolve_state = Type::eResolveStateFull; 407 } 408 else if (type_name_const_str == g_objc_type_name_selector) 409 { 410 if (log) 411 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 412 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'selector' built-in type.", 413 die.GetOffset(), 414 die.GetTagAsCString(), 415 die.GetName()); 416 clang_type = m_ast.GetBasicType(eBasicTypeObjCSel); 417 encoding_data_type = Type::eEncodingIsUID; 418 encoding_uid.Clear(); 419 resolve_state = Type::eResolveStateFull; 420 } 421 } 422 else if (encoding_data_type == Type::eEncodingIsPointerUID && encoding_uid.IsValid()) 423 { 424 // Clang sometimes erroneously emits id as objc_object*. In that case we fix up the type to "id". 425 426 const DWARFDIE encoding_die = dwarf->GetDIE(DIERef(encoding_uid)); 427 428 if (encoding_die && encoding_die.Tag() == DW_TAG_structure_type) 429 { 430 if (const char *struct_name = encoding_die.GetName()) 431 { 432 if (!strcmp(struct_name, "objc_object")) 433 { 434 if (log) 435 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 436 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is 'objc_object*', which we overrode to 'id'.", 437 die.GetOffset(), 438 die.GetTagAsCString(), 439 die.GetName()); 440 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 441 encoding_data_type = Type::eEncodingIsUID; 442 encoding_uid.Clear(); 443 resolve_state = Type::eResolveStateFull; 444 } 445 } 446 } 447 } 448 } 449 } 450 451 type_sp.reset( new Type (die.GetID(), 452 dwarf, 453 type_name_const_str, 454 byte_size, 455 NULL, 456 DIERef(encoding_uid).GetUID(dwarf), 457 encoding_data_type, 458 &decl, 459 clang_type, 460 resolve_state)); 461 462 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 463 464 // Type* encoding_type = GetUniquedTypeForDIEOffset(encoding_uid, type_sp, NULL, 0, 0, false); 465 // if (encoding_type != NULL) 466 // { 467 // if (encoding_type != DIE_IS_BEING_PARSED) 468 // type_sp->SetEncodingType(encoding_type); 469 // else 470 // m_indirect_fixups.push_back(type_sp.get()); 471 // } 472 } 473 break; 474 475 case DW_TAG_structure_type: 476 case DW_TAG_union_type: 477 case DW_TAG_class_type: 478 { 479 // Set a bit that lets us know that we are currently parsing this 480 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 481 bool byte_size_valid = false; 482 483 LanguageType class_language = eLanguageTypeUnknown; 484 bool is_complete_objc_class = false; 485 //bool struct_is_class = false; 486 const size_t num_attributes = die.GetAttributes (attributes); 487 if (num_attributes > 0) 488 { 489 uint32_t i; 490 for (i=0; i<num_attributes; ++i) 491 { 492 attr = attributes.AttributeAtIndex(i); 493 if (attributes.ExtractFormValueAtIndex(i, form_value)) 494 { 495 switch (attr) 496 { 497 case DW_AT_decl_file: 498 if (die.GetCU()->DW_AT_decl_file_attributes_are_invalid()) 499 { 500 // llvm-gcc outputs invalid DW_AT_decl_file attributes that always 501 // point to the compile unit file, so we clear this invalid value 502 // so that we can still unique types efficiently. 503 decl.SetFile(FileSpec ("<invalid>", false)); 504 } 505 else 506 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); 507 break; 508 509 case DW_AT_decl_line: 510 decl.SetLine(form_value.Unsigned()); 511 break; 512 513 case DW_AT_decl_column: 514 decl.SetColumn(form_value.Unsigned()); 515 break; 516 517 case DW_AT_name: 518 type_name_cstr = form_value.AsCString(); 519 type_name_const_str.SetCString(type_name_cstr); 520 break; 521 522 case DW_AT_byte_size: 523 byte_size = form_value.Unsigned(); 524 byte_size_valid = true; 525 break; 526 527 case DW_AT_accessibility: 528 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 529 break; 530 531 case DW_AT_declaration: 532 is_forward_declaration = form_value.Boolean(); 533 break; 534 535 case DW_AT_APPLE_runtime_class: 536 class_language = (LanguageType)form_value.Signed(); 537 break; 538 539 case DW_AT_APPLE_objc_complete_type: 540 is_complete_objc_class = form_value.Signed(); 541 break; 542 543 case DW_AT_allocated: 544 case DW_AT_associated: 545 case DW_AT_data_location: 546 case DW_AT_description: 547 case DW_AT_start_scope: 548 case DW_AT_visibility: 549 default: 550 case DW_AT_sibling: 551 break; 552 } 553 } 554 } 555 } 556 557 // UniqueDWARFASTType is large, so don't create a local variables on the 558 // stack, put it on the heap. This function is often called recursively 559 // and clang isn't good and sharing the stack space for variables in different blocks. 560 std::unique_ptr<UniqueDWARFASTType> unique_ast_entry_ap(new UniqueDWARFASTType()); 561 562 ConstString unique_typename(type_name_const_str); 563 Declaration unique_decl(decl); 564 565 if (type_name_const_str) 566 { 567 LanguageType die_language = die.GetLanguage(); 568 if (Language::LanguageIsCPlusPlus(die_language)) 569 { 570 // For C++, we rely solely upon the one definition rule that says only 571 // one thing can exist at a given decl context. We ignore the file and 572 // line that things are declared on. 573 std::string qualified_name; 574 if (die.GetQualifiedName(qualified_name)) 575 unique_typename = ConstString(qualified_name); 576 unique_decl.Clear(); 577 } 578 579 if (dwarf->GetUniqueDWARFASTTypeMap().Find(unique_typename, die, unique_decl, 580 byte_size_valid ? byte_size : -1, 581 *unique_ast_entry_ap)) 582 { 583 type_sp = unique_ast_entry_ap->m_type_sp; 584 if (type_sp) 585 { 586 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 587 return type_sp; 588 } 589 } 590 } 591 592 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr); 593 594 int tag_decl_kind = -1; 595 AccessType default_accessibility = eAccessNone; 596 if (tag == DW_TAG_structure_type) 597 { 598 tag_decl_kind = clang::TTK_Struct; 599 default_accessibility = eAccessPublic; 600 } 601 else if (tag == DW_TAG_union_type) 602 { 603 tag_decl_kind = clang::TTK_Union; 604 default_accessibility = eAccessPublic; 605 } 606 else if (tag == DW_TAG_class_type) 607 { 608 tag_decl_kind = clang::TTK_Class; 609 default_accessibility = eAccessPrivate; 610 } 611 612 if (byte_size_valid && byte_size == 0 && type_name_cstr && 613 die.HasChildren() == false && 614 sc.comp_unit->GetLanguage() == eLanguageTypeObjC) 615 { 616 // Work around an issue with clang at the moment where 617 // forward declarations for objective C classes are emitted 618 // as: 619 // DW_TAG_structure_type [2] 620 // DW_AT_name( "ForwardObjcClass" ) 621 // DW_AT_byte_size( 0x00 ) 622 // DW_AT_decl_file( "..." ) 623 // DW_AT_decl_line( 1 ) 624 // 625 // Note that there is no DW_AT_declaration and there are 626 // no children, and the byte size is zero. 627 is_forward_declaration = true; 628 } 629 630 if (class_language == eLanguageTypeObjC || 631 class_language == eLanguageTypeObjC_plus_plus) 632 { 633 if (!is_complete_objc_class && die.Supports_DW_AT_APPLE_objc_complete_type()) 634 { 635 // We have a valid eSymbolTypeObjCClass class symbol whose 636 // name matches the current objective C class that we 637 // are trying to find and this DIE isn't the complete 638 // definition (we checked is_complete_objc_class above and 639 // know it is false), so the real definition is in here somewhere 640 type_sp = dwarf->FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true); 641 642 if (!type_sp) 643 { 644 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 645 if (debug_map_symfile) 646 { 647 // We weren't able to find a full declaration in 648 // this DWARF, see if we have a declaration anywhere 649 // else... 650 type_sp = debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true); 651 } 652 } 653 654 if (type_sp) 655 { 656 if (log) 657 { 658 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 659 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is an incomplete objc type, complete type is 0x%8.8" PRIx64, 660 static_cast<void*>(this), 661 die.GetOffset(), 662 DW_TAG_value_to_name(tag), 663 type_name_cstr, 664 type_sp->GetID()); 665 } 666 667 // We found a real definition for this type elsewhere 668 // so lets use it and cache the fact that we found 669 // a complete type for this die 670 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 671 return type_sp; 672 } 673 } 674 } 675 676 677 if (is_forward_declaration) 678 { 679 // We have a forward declaration to a type and we need 680 // to try and find a full declaration. We look in the 681 // current type index just in case we have a forward 682 // declaration followed by an actual declarations in the 683 // DWARF. If this fails, we need to look elsewhere... 684 if (log) 685 { 686 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 687 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, trying to find complete type", 688 static_cast<void*>(this), 689 die.GetOffset(), 690 DW_TAG_value_to_name(tag), 691 type_name_cstr); 692 } 693 694 // See if the type comes from a DWO module and if so, track down that type. 695 type_sp = ParseTypeFromDWO(die, log); 696 if (type_sp) 697 return type_sp; 698 699 DWARFDeclContext die_decl_ctx; 700 die.GetDWARFDeclContext(die_decl_ctx); 701 702 //type_sp = FindDefinitionTypeForDIE (dwarf_cu, die, type_name_const_str); 703 type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx); 704 705 if (!type_sp) 706 { 707 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 708 if (debug_map_symfile) 709 { 710 // We weren't able to find a full declaration in 711 // this DWARF, see if we have a declaration anywhere 712 // else... 713 type_sp = debug_map_symfile->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx); 714 } 715 } 716 717 if (type_sp) 718 { 719 if (log) 720 { 721 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 722 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, complete type is 0x%8.8" PRIx64, 723 static_cast<void*>(this), 724 die.GetOffset(), 725 DW_TAG_value_to_name(tag), 726 type_name_cstr, 727 type_sp->GetID()); 728 } 729 730 // We found a real definition for this type elsewhere 731 // so lets use it and cache the fact that we found 732 // a complete type for this die 733 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 734 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE( 735 dwarf->DebugInfo()->GetDIE(DIERef(type_sp->GetID(), dwarf))); 736 if (defn_decl_ctx) 737 LinkDeclContextToDIE(defn_decl_ctx, die); 738 return type_sp; 739 } 740 } 741 assert (tag_decl_kind != -1); 742 bool clang_type_was_created = false; 743 clang_type.SetCompilerType(&m_ast, dwarf->GetForwardDeclDieToClangType().lookup (die.GetDIE())); 744 if (!clang_type) 745 { 746 clang::DeclContext *decl_ctx = GetClangDeclContextContainingDIE (die, nullptr); 747 if (accessibility == eAccessNone && decl_ctx) 748 { 749 // Check the decl context that contains this class/struct/union. 750 // If it is a class we must give it an accessibility. 751 const clang::Decl::Kind containing_decl_kind = decl_ctx->getDeclKind(); 752 if (DeclKindIsCXXClass (containing_decl_kind)) 753 accessibility = default_accessibility; 754 } 755 756 ClangASTMetadata metadata; 757 metadata.SetUserID(die.GetID()); 758 metadata.SetIsDynamicCXXType(dwarf->ClassOrStructIsVirtual (die)); 759 760 if (type_name_cstr && strchr (type_name_cstr, '<')) 761 { 762 ClangASTContext::TemplateParameterInfos template_param_infos; 763 if (ParseTemplateParameterInfos (die, template_param_infos)) 764 { 765 clang::ClassTemplateDecl *class_template_decl = m_ast.ParseClassTemplateDecl (decl_ctx, 766 accessibility, 767 type_name_cstr, 768 tag_decl_kind, 769 template_param_infos); 770 771 clang::ClassTemplateSpecializationDecl *class_specialization_decl = m_ast.CreateClassTemplateSpecializationDecl (decl_ctx, 772 class_template_decl, 773 tag_decl_kind, 774 template_param_infos); 775 clang_type = m_ast.CreateClassTemplateSpecializationType (class_specialization_decl); 776 clang_type_was_created = true; 777 778 m_ast.SetMetadata (class_template_decl, metadata); 779 m_ast.SetMetadata (class_specialization_decl, metadata); 780 } 781 } 782 783 if (!clang_type_was_created) 784 { 785 clang_type_was_created = true; 786 clang_type = m_ast.CreateRecordType (decl_ctx, 787 accessibility, 788 type_name_cstr, 789 tag_decl_kind, 790 class_language, 791 &metadata); 792 } 793 } 794 795 // Store a forward declaration to this class type in case any 796 // parameters in any class methods need it for the clang 797 // types for function prototypes. 798 LinkDeclContextToDIE(m_ast.GetDeclContextForType(clang_type), die); 799 type_sp.reset (new Type (die.GetID(), 800 dwarf, 801 type_name_const_str, 802 byte_size, 803 NULL, 804 LLDB_INVALID_UID, 805 Type::eEncodingIsUID, 806 &decl, 807 clang_type, 808 Type::eResolveStateForward)); 809 810 type_sp->SetIsCompleteObjCClass(is_complete_objc_class); 811 812 813 // Add our type to the unique type map so we don't 814 // end up creating many copies of the same type over 815 // and over in the ASTContext for our module 816 unique_ast_entry_ap->m_type_sp = type_sp; 817 unique_ast_entry_ap->m_die = die; 818 unique_ast_entry_ap->m_declaration = unique_decl; 819 unique_ast_entry_ap->m_byte_size = byte_size; 820 dwarf->GetUniqueDWARFASTTypeMap().Insert (unique_typename, 821 *unique_ast_entry_ap); 822 823 if (is_forward_declaration && die.HasChildren()) 824 { 825 // Check to see if the DIE actually has a definition, some version of GCC will 826 // emit DIEs with DW_AT_declaration set to true, but yet still have subprogram, 827 // members, or inheritance, so we can't trust it 828 DWARFDIE child_die = die.GetFirstChild(); 829 while (child_die) 830 { 831 switch (child_die.Tag()) 832 { 833 case DW_TAG_inheritance: 834 case DW_TAG_subprogram: 835 case DW_TAG_member: 836 case DW_TAG_APPLE_property: 837 case DW_TAG_class_type: 838 case DW_TAG_structure_type: 839 case DW_TAG_enumeration_type: 840 case DW_TAG_typedef: 841 case DW_TAG_union_type: 842 child_die.Clear(); 843 is_forward_declaration = false; 844 break; 845 default: 846 child_die = child_die.GetSibling(); 847 break; 848 } 849 } 850 } 851 852 if (!is_forward_declaration) 853 { 854 // Always start the definition for a class type so that 855 // if the class has child classes or types that require 856 // the class to be created for use as their decl contexts 857 // the class will be ready to accept these child definitions. 858 if (die.HasChildren() == false) 859 { 860 // No children for this struct/union/class, lets finish it 861 ClangASTContext::StartTagDeclarationDefinition (clang_type); 862 ClangASTContext::CompleteTagDeclarationDefinition (clang_type); 863 864 if (tag == DW_TAG_structure_type) // this only applies in C 865 { 866 clang::RecordDecl *record_decl = ClangASTContext::GetAsRecordDecl(clang_type); 867 868 if (record_decl) 869 { 870 GetClangASTImporter().InsertRecordDecl(record_decl, ClangASTImporter::LayoutInfo()); 871 } 872 } 873 } 874 else if (clang_type_was_created) 875 { 876 // Start the definition if the class is not objective C since 877 // the underlying decls respond to isCompleteDefinition(). Objective 878 // C decls don't respond to isCompleteDefinition() so we can't 879 // start the declaration definition right away. For C++ class/union/structs 880 // we want to start the definition in case the class is needed as the 881 // declaration context for a contained class or type without the need 882 // to complete that type.. 883 884 if (class_language != eLanguageTypeObjC && 885 class_language != eLanguageTypeObjC_plus_plus) 886 ClangASTContext::StartTagDeclarationDefinition (clang_type); 887 888 // Leave this as a forward declaration until we need 889 // to know the details of the type. lldb_private::Type 890 // will automatically call the SymbolFile virtual function 891 // "SymbolFileDWARF::CompleteType(Type *)" 892 // When the definition needs to be defined. 893 assert(!dwarf->GetForwardDeclClangTypeToDie().count( 894 ClangUtil::RemoveFastQualifiers(clang_type).GetOpaqueQualType()) && 895 "Type already in the forward declaration map!"); 896 // Can't assume m_ast.GetSymbolFile() is actually a SymbolFileDWARF, it can be a 897 // SymbolFileDWARFDebugMap for Apple binaries. 898 dwarf->GetForwardDeclDieToClangType()[die.GetDIE()] = clang_type.GetOpaqueQualType(); 899 dwarf->GetForwardDeclClangTypeToDie()[ClangUtil::RemoveFastQualifiers(clang_type) 900 .GetOpaqueQualType()] = die.GetDIERef(); 901 m_ast.SetHasExternalStorage (clang_type.GetOpaqueQualType(), true); 902 } 903 } 904 } 905 break; 906 907 case DW_TAG_enumeration_type: 908 { 909 // Set a bit that lets us know that we are currently parsing this 910 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 911 912 DWARFFormValue encoding_form; 913 914 const size_t num_attributes = die.GetAttributes (attributes); 915 if (num_attributes > 0) 916 { 917 uint32_t i; 918 919 for (i=0; i<num_attributes; ++i) 920 { 921 attr = attributes.AttributeAtIndex(i); 922 if (attributes.ExtractFormValueAtIndex(i, form_value)) 923 { 924 switch (attr) 925 { 926 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 927 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 928 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 929 case DW_AT_name: 930 type_name_cstr = form_value.AsCString(); 931 type_name_const_str.SetCString(type_name_cstr); 932 break; 933 case DW_AT_type: encoding_form = form_value; break; 934 case DW_AT_byte_size: byte_size = form_value.Unsigned(); break; 935 case DW_AT_accessibility: break; //accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 936 case DW_AT_declaration: is_forward_declaration = form_value.Boolean(); break; 937 case DW_AT_allocated: 938 case DW_AT_associated: 939 case DW_AT_bit_stride: 940 case DW_AT_byte_stride: 941 case DW_AT_data_location: 942 case DW_AT_description: 943 case DW_AT_start_scope: 944 case DW_AT_visibility: 945 case DW_AT_specification: 946 case DW_AT_abstract_origin: 947 case DW_AT_sibling: 948 break; 949 } 950 } 951 } 952 953 if (is_forward_declaration) 954 { 955 type_sp = ParseTypeFromDWO(die, log); 956 if (type_sp) 957 return type_sp; 958 959 DWARFDeclContext die_decl_ctx; 960 die.GetDWARFDeclContext(die_decl_ctx); 961 962 type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx); 963 964 if (!type_sp) 965 { 966 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 967 if (debug_map_symfile) 968 { 969 // We weren't able to find a full declaration in 970 // this DWARF, see if we have a declaration anywhere 971 // else... 972 type_sp = debug_map_symfile->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx); 973 } 974 } 975 976 if (type_sp) 977 { 978 if (log) 979 { 980 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 981 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, complete type is 0x%8.8" PRIx64, 982 static_cast<void*>(this), 983 die.GetOffset(), 984 DW_TAG_value_to_name(tag), 985 type_name_cstr, 986 type_sp->GetID()); 987 } 988 989 // We found a real definition for this type elsewhere 990 // so lets use it and cache the fact that we found 991 // a complete type for this die 992 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 993 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE(dwarf->DebugInfo()->GetDIE(DIERef(type_sp->GetID(), dwarf))); 994 if (defn_decl_ctx) 995 LinkDeclContextToDIE(defn_decl_ctx, die); 996 return type_sp; 997 } 998 999 } 1000 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr); 1001 1002 CompilerType enumerator_clang_type; 1003 clang_type.SetCompilerType (&m_ast, dwarf->GetForwardDeclDieToClangType().lookup (die.GetDIE())); 1004 if (!clang_type) 1005 { 1006 if (encoding_form.IsValid()) 1007 { 1008 Type *enumerator_type = dwarf->ResolveTypeUID(DIERef(encoding_form)); 1009 if (enumerator_type) 1010 enumerator_clang_type = enumerator_type->GetFullCompilerType (); 1011 } 1012 1013 if (!enumerator_clang_type) 1014 { 1015 if (byte_size > 0) 1016 { 1017 enumerator_clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize(NULL, 1018 DW_ATE_signed, 1019 byte_size * 8); 1020 } 1021 else 1022 { 1023 enumerator_clang_type = m_ast.GetBasicType(eBasicTypeInt); 1024 } 1025 } 1026 1027 clang_type = m_ast.CreateEnumerationType (type_name_cstr, 1028 GetClangDeclContextContainingDIE (die, nullptr), 1029 decl, 1030 enumerator_clang_type); 1031 } 1032 else 1033 { 1034 enumerator_clang_type = m_ast.GetEnumerationIntegerType (clang_type.GetOpaqueQualType()); 1035 } 1036 1037 LinkDeclContextToDIE(ClangASTContext::GetDeclContextForType(clang_type), die); 1038 1039 type_sp.reset( new Type (die.GetID(), 1040 dwarf, 1041 type_name_const_str, 1042 byte_size, 1043 NULL, 1044 DIERef(encoding_form).GetUID(dwarf), 1045 Type::eEncodingIsUID, 1046 &decl, 1047 clang_type, 1048 Type::eResolveStateForward)); 1049 1050 ClangASTContext::StartTagDeclarationDefinition (clang_type); 1051 if (die.HasChildren()) 1052 { 1053 SymbolContext cu_sc(die.GetLLDBCompileUnit()); 1054 bool is_signed = false; 1055 enumerator_clang_type.IsIntegerType(is_signed); 1056 ParseChildEnumerators(cu_sc, clang_type, is_signed, type_sp->GetByteSize(), die); 1057 } 1058 ClangASTContext::CompleteTagDeclarationDefinition (clang_type); 1059 } 1060 } 1061 break; 1062 1063 case DW_TAG_inlined_subroutine: 1064 case DW_TAG_subprogram: 1065 case DW_TAG_subroutine_type: 1066 { 1067 // Set a bit that lets us know that we are currently parsing this 1068 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1069 1070 DWARFFormValue type_die_form; 1071 bool is_variadic = false; 1072 bool is_inline = false; 1073 bool is_static = false; 1074 bool is_virtual = false; 1075 bool is_explicit = false; 1076 bool is_artificial = false; 1077 bool has_template_params = false; 1078 DWARFFormValue specification_die_form; 1079 DWARFFormValue abstract_origin_die_form; 1080 dw_offset_t object_pointer_die_offset = DW_INVALID_OFFSET; 1081 1082 unsigned type_quals = 0; 1083 clang::StorageClass storage = clang::SC_None;//, Extern, Static, PrivateExtern 1084 1085 1086 const size_t num_attributes = die.GetAttributes (attributes); 1087 if (num_attributes > 0) 1088 { 1089 uint32_t i; 1090 for (i=0; i<num_attributes; ++i) 1091 { 1092 attr = attributes.AttributeAtIndex(i); 1093 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1094 { 1095 switch (attr) 1096 { 1097 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 1098 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 1099 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 1100 case DW_AT_name: 1101 type_name_cstr = form_value.AsCString(); 1102 type_name_const_str.SetCString(type_name_cstr); 1103 break; 1104 1105 case DW_AT_linkage_name: 1106 case DW_AT_MIPS_linkage_name: break; // mangled = form_value.AsCString(&dwarf->get_debug_str_data()); break; 1107 case DW_AT_type: type_die_form = form_value; break; 1108 case DW_AT_accessibility: accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 1109 case DW_AT_declaration: break; // is_forward_declaration = form_value.Boolean(); break; 1110 case DW_AT_inline: is_inline = form_value.Boolean(); break; 1111 case DW_AT_virtuality: is_virtual = form_value.Boolean(); break; 1112 case DW_AT_explicit: is_explicit = form_value.Boolean(); break; 1113 case DW_AT_artificial: is_artificial = form_value.Boolean(); break; 1114 1115 1116 case DW_AT_external: 1117 if (form_value.Unsigned()) 1118 { 1119 if (storage == clang::SC_None) 1120 storage = clang::SC_Extern; 1121 else 1122 storage = clang::SC_PrivateExtern; 1123 } 1124 break; 1125 1126 case DW_AT_specification: 1127 specification_die_form = form_value; 1128 break; 1129 1130 case DW_AT_abstract_origin: 1131 abstract_origin_die_form = form_value; 1132 break; 1133 1134 case DW_AT_object_pointer: 1135 object_pointer_die_offset = form_value.Reference(); 1136 break; 1137 1138 case DW_AT_allocated: 1139 case DW_AT_associated: 1140 case DW_AT_address_class: 1141 case DW_AT_calling_convention: 1142 case DW_AT_data_location: 1143 case DW_AT_elemental: 1144 case DW_AT_entry_pc: 1145 case DW_AT_frame_base: 1146 case DW_AT_high_pc: 1147 case DW_AT_low_pc: 1148 case DW_AT_prototyped: 1149 case DW_AT_pure: 1150 case DW_AT_ranges: 1151 case DW_AT_recursive: 1152 case DW_AT_return_addr: 1153 case DW_AT_segment: 1154 case DW_AT_start_scope: 1155 case DW_AT_static_link: 1156 case DW_AT_trampoline: 1157 case DW_AT_visibility: 1158 case DW_AT_vtable_elem_location: 1159 case DW_AT_description: 1160 case DW_AT_sibling: 1161 break; 1162 } 1163 } 1164 } 1165 } 1166 1167 std::string object_pointer_name; 1168 if (object_pointer_die_offset != DW_INVALID_OFFSET) 1169 { 1170 DWARFDIE object_pointer_die = die.GetDIE (object_pointer_die_offset); 1171 if (object_pointer_die) 1172 { 1173 const char *object_pointer_name_cstr = object_pointer_die.GetName(); 1174 if (object_pointer_name_cstr) 1175 object_pointer_name = object_pointer_name_cstr; 1176 } 1177 } 1178 1179 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr); 1180 1181 CompilerType return_clang_type; 1182 Type *func_type = NULL; 1183 1184 if (type_die_form.IsValid()) 1185 func_type = dwarf->ResolveTypeUID(DIERef(type_die_form)); 1186 1187 if (func_type) 1188 return_clang_type = func_type->GetForwardCompilerType (); 1189 else 1190 return_clang_type = m_ast.GetBasicType(eBasicTypeVoid); 1191 1192 1193 std::vector<CompilerType> function_param_types; 1194 std::vector<clang::ParmVarDecl*> function_param_decls; 1195 1196 // Parse the function children for the parameters 1197 1198 DWARFDIE decl_ctx_die; 1199 clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (die, &decl_ctx_die); 1200 const clang::Decl::Kind containing_decl_kind = containing_decl_ctx->getDeclKind(); 1201 1202 bool is_cxx_method = DeclKindIsCXXClass (containing_decl_kind); 1203 // Start off static. This will be set to false in ParseChildParameters(...) 1204 // if we find a "this" parameters as the first parameter 1205 if (is_cxx_method) 1206 { 1207 is_static = true; 1208 } 1209 1210 if (die.HasChildren()) 1211 { 1212 bool skip_artificial = true; 1213 ParseChildParameters (sc, 1214 containing_decl_ctx, 1215 die, 1216 skip_artificial, 1217 is_static, 1218 is_variadic, 1219 has_template_params, 1220 function_param_types, 1221 function_param_decls, 1222 type_quals); 1223 } 1224 1225 bool ignore_containing_context = false; 1226 // Check for templatized class member functions. If we had any DW_TAG_template_type_parameter 1227 // or DW_TAG_template_value_parameter the DW_TAG_subprogram DIE, then we can't let this become 1228 // a method in a class. Why? Because templatized functions are only emitted if one of the 1229 // templatized methods is used in the current compile unit and we will end up with classes 1230 // that may or may not include these member functions and this means one class won't match another 1231 // class definition and it affects our ability to use a class in the clang expression parser. So 1232 // for the greater good, we currently must not allow any template member functions in a class definition. 1233 if (is_cxx_method && has_template_params) 1234 { 1235 ignore_containing_context = true; 1236 is_cxx_method = false; 1237 } 1238 1239 // clang_type will get the function prototype clang type after this call 1240 clang_type = m_ast.CreateFunctionType (return_clang_type, 1241 function_param_types.data(), 1242 function_param_types.size(), 1243 is_variadic, 1244 type_quals); 1245 1246 1247 if (type_name_cstr) 1248 { 1249 bool type_handled = false; 1250 if (tag == DW_TAG_subprogram || 1251 tag == DW_TAG_inlined_subroutine) 1252 { 1253 ObjCLanguage::MethodName objc_method (type_name_cstr, true); 1254 if (objc_method.IsValid(true)) 1255 { 1256 CompilerType class_opaque_type; 1257 ConstString class_name(objc_method.GetClassName()); 1258 if (class_name) 1259 { 1260 TypeSP complete_objc_class_type_sp (dwarf->FindCompleteObjCDefinitionTypeForDIE (DWARFDIE(), class_name, false)); 1261 1262 if (complete_objc_class_type_sp) 1263 { 1264 CompilerType type_clang_forward_type = complete_objc_class_type_sp->GetForwardCompilerType (); 1265 if (ClangASTContext::IsObjCObjectOrInterfaceType(type_clang_forward_type)) 1266 class_opaque_type = type_clang_forward_type; 1267 } 1268 } 1269 1270 if (class_opaque_type) 1271 { 1272 // If accessibility isn't set to anything valid, assume public for 1273 // now... 1274 if (accessibility == eAccessNone) 1275 accessibility = eAccessPublic; 1276 1277 clang::ObjCMethodDecl *objc_method_decl = m_ast.AddMethodToObjCObjectType (class_opaque_type, 1278 type_name_cstr, 1279 clang_type, 1280 accessibility, 1281 is_artificial); 1282 type_handled = objc_method_decl != NULL; 1283 if (type_handled) 1284 { 1285 LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(objc_method_decl), die); 1286 m_ast.SetMetadataAsUserID (objc_method_decl, die.GetID()); 1287 } 1288 else 1289 { 1290 dwarf->GetObjectFile()->GetModule()->ReportError ("{0x%8.8x}: invalid Objective-C method 0x%4.4x (%s), please file a bug and attach the file at the start of this error message", 1291 die.GetOffset(), 1292 tag, 1293 DW_TAG_value_to_name(tag)); 1294 } 1295 } 1296 } 1297 else if (is_cxx_method) 1298 { 1299 // Look at the parent of this DIE and see if is is 1300 // a class or struct and see if this is actually a 1301 // C++ method 1302 Type *class_type = dwarf->ResolveType (decl_ctx_die); 1303 if (class_type) 1304 { 1305 bool alternate_defn = false; 1306 if (class_type->GetID() != decl_ctx_die.GetID() || decl_ctx_die.GetContainingDWOModuleDIE()) 1307 { 1308 alternate_defn = true; 1309 1310 // We uniqued the parent class of this function to another class 1311 // so we now need to associate all dies under "decl_ctx_die" to 1312 // DIEs in the DIE for "class_type"... 1313 SymbolFileDWARF *class_symfile = NULL; 1314 DWARFDIE class_type_die; 1315 1316 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 1317 if (debug_map_symfile) 1318 { 1319 class_symfile = debug_map_symfile->GetSymbolFileByOSOIndex(SymbolFileDWARFDebugMap::GetOSOIndexFromUserID(class_type->GetID())); 1320 class_type_die = class_symfile->DebugInfo()->GetDIE (DIERef(class_type->GetID(), dwarf)); 1321 } 1322 else 1323 { 1324 class_symfile = dwarf; 1325 class_type_die = dwarf->DebugInfo()->GetDIE (DIERef(class_type->GetID(), dwarf)); 1326 } 1327 if (class_type_die) 1328 { 1329 DWARFDIECollection failures; 1330 1331 CopyUniqueClassMethodTypes (decl_ctx_die, 1332 class_type_die, 1333 class_type, 1334 failures); 1335 1336 // FIXME do something with these failures that's smarter than 1337 // just dropping them on the ground. Unfortunately classes don't 1338 // like having stuff added to them after their definitions are 1339 // complete... 1340 1341 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1342 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) 1343 { 1344 type_sp = type_ptr->shared_from_this(); 1345 break; 1346 } 1347 } 1348 } 1349 1350 if (specification_die_form.IsValid()) 1351 { 1352 // We have a specification which we are going to base our function 1353 // prototype off of, so we need this type to be completed so that the 1354 // m_die_to_decl_ctx for the method in the specification has a valid 1355 // clang decl context. 1356 class_type->GetForwardCompilerType (); 1357 // If we have a specification, then the function type should have been 1358 // made with the specification and not with this die. 1359 DWARFDIE spec_die = dwarf->DebugInfo()->GetDIE(DIERef(specification_die_form)); 1360 clang::DeclContext *spec_clang_decl_ctx = GetClangDeclContextForDIE (spec_die); 1361 if (spec_clang_decl_ctx) 1362 { 1363 LinkDeclContextToDIE(spec_clang_decl_ctx, die); 1364 } 1365 else 1366 { 1367 dwarf->GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8" PRIx64 ") has no decl\n", 1368 die.GetID(), 1369 specification_die_form.Reference()); 1370 } 1371 type_handled = true; 1372 } 1373 else if (abstract_origin_die_form.IsValid()) 1374 { 1375 // We have a specification which we are going to base our function 1376 // prototype off of, so we need this type to be completed so that the 1377 // m_die_to_decl_ctx for the method in the abstract origin has a valid 1378 // clang decl context. 1379 class_type->GetForwardCompilerType (); 1380 1381 DWARFDIE abs_die = dwarf->DebugInfo()->GetDIE (DIERef(abstract_origin_die_form)); 1382 clang::DeclContext *abs_clang_decl_ctx = GetClangDeclContextForDIE (abs_die); 1383 if (abs_clang_decl_ctx) 1384 { 1385 LinkDeclContextToDIE (abs_clang_decl_ctx, die); 1386 } 1387 else 1388 { 1389 dwarf->GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8" PRIx64 ") has no decl\n", 1390 die.GetID(), 1391 abstract_origin_die_form.Reference()); 1392 } 1393 type_handled = true; 1394 } 1395 else 1396 { 1397 CompilerType class_opaque_type = class_type->GetForwardCompilerType (); 1398 if (ClangASTContext::IsCXXClassType(class_opaque_type)) 1399 { 1400 if (class_opaque_type.IsBeingDefined () || alternate_defn) 1401 { 1402 if (!is_static && !die.HasChildren()) 1403 { 1404 // We have a C++ member function with no children (this pointer!) 1405 // and clang will get mad if we try and make a function that isn't 1406 // well formed in the DWARF, so we will just skip it... 1407 type_handled = true; 1408 } 1409 else 1410 { 1411 bool add_method = true; 1412 if (alternate_defn) 1413 { 1414 // If an alternate definition for the class exists, then add the method only if an 1415 // equivalent is not already present. 1416 clang::CXXRecordDecl *record_decl = m_ast.GetAsCXXRecordDecl(class_opaque_type.GetOpaqueQualType()); 1417 if (record_decl) 1418 { 1419 for (auto method_iter = record_decl->method_begin(); 1420 method_iter != record_decl->method_end(); 1421 method_iter++) 1422 { 1423 clang::CXXMethodDecl *method_decl = *method_iter; 1424 if (method_decl->getNameInfo().getAsString() == std::string(type_name_cstr)) 1425 { 1426 if (method_decl->getType() == 1427 ClangUtil::GetQualType(clang_type)) 1428 { 1429 add_method = false; 1430 LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(method_decl), die); 1431 type_handled = true; 1432 1433 break; 1434 } 1435 } 1436 } 1437 } 1438 } 1439 1440 if (add_method) 1441 { 1442 // REMOVE THE CRASH DESCRIPTION BELOW 1443 Host::SetCrashDescriptionWithFormat ("SymbolFileDWARF::ParseType() is adding a method %s to class %s in DIE 0x%8.8" PRIx64 " from %s", 1444 type_name_cstr, 1445 class_type->GetName().GetCString(), 1446 die.GetID(), 1447 dwarf->GetObjectFile()->GetFileSpec().GetPath().c_str()); 1448 1449 const bool is_attr_used = false; 1450 // Neither GCC 4.2 nor clang++ currently set a valid accessibility 1451 // in the DWARF for C++ methods... Default to public for now... 1452 if (accessibility == eAccessNone) 1453 accessibility = eAccessPublic; 1454 1455 clang::CXXMethodDecl *cxx_method_decl; 1456 cxx_method_decl = m_ast.AddMethodToCXXRecordType (class_opaque_type.GetOpaqueQualType(), 1457 type_name_cstr, 1458 clang_type, 1459 accessibility, 1460 is_virtual, 1461 is_static, 1462 is_inline, 1463 is_explicit, 1464 is_attr_used, 1465 is_artificial); 1466 1467 type_handled = cxx_method_decl != NULL; 1468 1469 if (type_handled) 1470 { 1471 LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(cxx_method_decl), die); 1472 1473 Host::SetCrashDescription (NULL); 1474 1475 ClangASTMetadata metadata; 1476 metadata.SetUserID(die.GetID()); 1477 1478 if (!object_pointer_name.empty()) 1479 { 1480 metadata.SetObjectPtrName(object_pointer_name.c_str()); 1481 if (log) 1482 log->Printf ("Setting object pointer name: %s on method object %p.\n", 1483 object_pointer_name.c_str(), 1484 static_cast<void*>(cxx_method_decl)); 1485 } 1486 m_ast.SetMetadata (cxx_method_decl, metadata); 1487 } 1488 else 1489 { 1490 ignore_containing_context = true; 1491 } 1492 } 1493 } 1494 } 1495 else 1496 { 1497 // We were asked to parse the type for a method in a class, yet the 1498 // class hasn't been asked to complete itself through the 1499 // clang::ExternalASTSource protocol, so we need to just have the 1500 // class complete itself and do things the right way, then our 1501 // DIE should then have an entry in the dwarf->GetDIEToType() map. First 1502 // we need to modify the dwarf->GetDIEToType() so it doesn't think we are 1503 // trying to parse this DIE anymore... 1504 dwarf->GetDIEToType()[die.GetDIE()] = NULL; 1505 1506 // Now we get the full type to force our class type to complete itself 1507 // using the clang::ExternalASTSource protocol which will parse all 1508 // base classes and all methods (including the method for this DIE). 1509 class_type->GetFullCompilerType (); 1510 1511 // The type for this DIE should have been filled in the function call above 1512 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1513 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) 1514 { 1515 type_sp = type_ptr->shared_from_this(); 1516 break; 1517 } 1518 1519 // FIXME This is fixing some even uglier behavior but we really need to 1520 // uniq the methods of each class as well as the class itself. 1521 // <rdar://problem/11240464> 1522 type_handled = true; 1523 } 1524 } 1525 } 1526 } 1527 } 1528 } 1529 1530 if (!type_handled) 1531 { 1532 clang::FunctionDecl *function_decl = nullptr; 1533 1534 if (abstract_origin_die_form.IsValid()) 1535 { 1536 DWARFDIE abs_die = dwarf->DebugInfo()->GetDIE (DIERef(abstract_origin_die_form)); 1537 1538 SymbolContext sc; 1539 1540 if (dwarf->ResolveType (abs_die)) 1541 { 1542 function_decl = llvm::dyn_cast_or_null<clang::FunctionDecl>(GetCachedClangDeclContextForDIE(abs_die)); 1543 1544 if (function_decl) 1545 { 1546 LinkDeclContextToDIE(function_decl, die); 1547 } 1548 } 1549 } 1550 1551 if (!function_decl) 1552 { 1553 // We just have a function that isn't part of a class 1554 function_decl = m_ast.CreateFunctionDeclaration (ignore_containing_context ? m_ast.GetTranslationUnitDecl() : containing_decl_ctx, 1555 type_name_cstr, 1556 clang_type, 1557 storage, 1558 is_inline); 1559 1560 // if (template_param_infos.GetSize() > 0) 1561 // { 1562 // clang::FunctionTemplateDecl *func_template_decl = CreateFunctionTemplateDecl (containing_decl_ctx, 1563 // function_decl, 1564 // type_name_cstr, 1565 // template_param_infos); 1566 // 1567 // CreateFunctionTemplateSpecializationInfo (function_decl, 1568 // func_template_decl, 1569 // template_param_infos); 1570 // } 1571 // Add the decl to our DIE to decl context map 1572 1573 lldbassert (function_decl); 1574 1575 if (function_decl) 1576 { 1577 LinkDeclContextToDIE(function_decl, die); 1578 1579 if (!function_param_decls.empty()) 1580 m_ast.SetFunctionParameters (function_decl, 1581 &function_param_decls.front(), 1582 function_param_decls.size()); 1583 1584 ClangASTMetadata metadata; 1585 metadata.SetUserID(die.GetID()); 1586 1587 if (!object_pointer_name.empty()) 1588 { 1589 metadata.SetObjectPtrName(object_pointer_name.c_str()); 1590 if (log) 1591 log->Printf ("Setting object pointer name: %s on function object %p.", 1592 object_pointer_name.c_str(), 1593 static_cast<void*>(function_decl)); 1594 } 1595 m_ast.SetMetadata (function_decl, metadata); 1596 } 1597 } 1598 } 1599 } 1600 type_sp.reset( new Type (die.GetID(), 1601 dwarf, 1602 type_name_const_str, 1603 0, 1604 NULL, 1605 LLDB_INVALID_UID, 1606 Type::eEncodingIsUID, 1607 &decl, 1608 clang_type, 1609 Type::eResolveStateFull)); 1610 assert(type_sp.get()); 1611 } 1612 break; 1613 1614 case DW_TAG_array_type: 1615 { 1616 // Set a bit that lets us know that we are currently parsing this 1617 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1618 1619 DWARFFormValue type_die_form; 1620 int64_t first_index = 0; 1621 uint32_t byte_stride = 0; 1622 uint32_t bit_stride = 0; 1623 bool is_vector = false; 1624 const size_t num_attributes = die.GetAttributes (attributes); 1625 1626 if (num_attributes > 0) 1627 { 1628 uint32_t i; 1629 for (i=0; i<num_attributes; ++i) 1630 { 1631 attr = attributes.AttributeAtIndex(i); 1632 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1633 { 1634 switch (attr) 1635 { 1636 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 1637 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 1638 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 1639 case DW_AT_name: 1640 type_name_cstr = form_value.AsCString(); 1641 type_name_const_str.SetCString(type_name_cstr); 1642 break; 1643 1644 case DW_AT_type: type_die_form = form_value; break; 1645 case DW_AT_byte_size: break; // byte_size = form_value.Unsigned(); break; 1646 case DW_AT_byte_stride: byte_stride = form_value.Unsigned(); break; 1647 case DW_AT_bit_stride: bit_stride = form_value.Unsigned(); break; 1648 case DW_AT_GNU_vector: is_vector = form_value.Boolean(); break; 1649 case DW_AT_accessibility: break; // accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 1650 case DW_AT_declaration: break; // is_forward_declaration = form_value.Boolean(); break; 1651 case DW_AT_allocated: 1652 case DW_AT_associated: 1653 case DW_AT_data_location: 1654 case DW_AT_description: 1655 case DW_AT_ordering: 1656 case DW_AT_start_scope: 1657 case DW_AT_visibility: 1658 case DW_AT_specification: 1659 case DW_AT_abstract_origin: 1660 case DW_AT_sibling: 1661 break; 1662 } 1663 } 1664 } 1665 1666 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr); 1667 1668 DIERef type_die_ref(type_die_form); 1669 Type *element_type = dwarf->ResolveTypeUID(type_die_ref); 1670 1671 if (element_type) 1672 { 1673 std::vector<uint64_t> element_orders; 1674 ParseChildArrayInfo(sc, die, first_index, element_orders, byte_stride, bit_stride); 1675 if (byte_stride == 0 && bit_stride == 0) 1676 byte_stride = element_type->GetByteSize(); 1677 CompilerType array_element_type = element_type->GetForwardCompilerType (); 1678 1679 if (ClangASTContext::IsCXXClassType(array_element_type) && array_element_type.GetCompleteType() == false) 1680 { 1681 ModuleSP module_sp = die.GetModule(); 1682 if (module_sp) 1683 { 1684 if (die.GetCU()->GetProducer() == DWARFCompileUnit::eProducerClang) 1685 module_sp->ReportError ("DWARF DW_TAG_array_type DIE at 0x%8.8x has a class/union/struct element type DIE 0x%8.8x that is a forward declaration, not a complete definition.\nTry compiling the source file with -fno-limit-debug-info or disable -gmodule", 1686 die.GetOffset(), 1687 type_die_ref.die_offset); 1688 else 1689 module_sp->ReportError ("DWARF DW_TAG_array_type DIE at 0x%8.8x has a class/union/struct element type DIE 0x%8.8x that is a forward declaration, not a complete definition.\nPlease file a bug against the compiler and include the preprocessed output for %s", 1690 die.GetOffset(), 1691 type_die_ref.die_offset, 1692 die.GetLLDBCompileUnit() ? die.GetLLDBCompileUnit()->GetPath().c_str() : "the source file"); 1693 } 1694 1695 // We have no choice other than to pretend that the element class type 1696 // is complete. If we don't do this, clang will crash when trying 1697 // to layout the class. Since we provide layout assistance, all 1698 // ivars in this class and other classes will be fine, this is 1699 // the best we can do short of crashing. 1700 ClangASTContext::StartTagDeclarationDefinition(array_element_type); 1701 ClangASTContext::CompleteTagDeclarationDefinition(array_element_type); 1702 } 1703 1704 uint64_t array_element_bit_stride = byte_stride * 8 + bit_stride; 1705 if (element_orders.size() > 0) 1706 { 1707 uint64_t num_elements = 0; 1708 std::vector<uint64_t>::const_reverse_iterator pos; 1709 std::vector<uint64_t>::const_reverse_iterator end = element_orders.rend(); 1710 for (pos = element_orders.rbegin(); pos != end; ++pos) 1711 { 1712 num_elements = *pos; 1713 clang_type = m_ast.CreateArrayType (array_element_type, 1714 num_elements, 1715 is_vector); 1716 array_element_type = clang_type; 1717 array_element_bit_stride = num_elements ? 1718 array_element_bit_stride * num_elements : 1719 array_element_bit_stride; 1720 } 1721 } 1722 else 1723 { 1724 clang_type = m_ast.CreateArrayType (array_element_type, 0, is_vector); 1725 } 1726 ConstString empty_name; 1727 type_sp.reset( new Type (die.GetID(), 1728 dwarf, 1729 empty_name, 1730 array_element_bit_stride / 8, 1731 NULL, 1732 DIERef(type_die_form).GetUID(dwarf), 1733 Type::eEncodingIsUID, 1734 &decl, 1735 clang_type, 1736 Type::eResolveStateFull)); 1737 type_sp->SetEncodingType (element_type); 1738 } 1739 } 1740 } 1741 break; 1742 1743 case DW_TAG_ptr_to_member_type: 1744 { 1745 DWARFFormValue type_die_form; 1746 DWARFFormValue containing_type_die_form; 1747 1748 const size_t num_attributes = die.GetAttributes (attributes); 1749 1750 if (num_attributes > 0) { 1751 uint32_t i; 1752 for (i=0; i<num_attributes; ++i) 1753 { 1754 attr = attributes.AttributeAtIndex(i); 1755 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1756 { 1757 switch (attr) 1758 { 1759 case DW_AT_type: 1760 type_die_form = form_value; break; 1761 case DW_AT_containing_type: 1762 containing_type_die_form = form_value; break; 1763 } 1764 } 1765 } 1766 1767 Type *pointee_type = dwarf->ResolveTypeUID(DIERef(type_die_form)); 1768 Type *class_type = dwarf->ResolveTypeUID(DIERef(containing_type_die_form)); 1769 1770 CompilerType pointee_clang_type = pointee_type->GetForwardCompilerType (); 1771 CompilerType class_clang_type = class_type->GetLayoutCompilerType (); 1772 1773 clang_type = ClangASTContext::CreateMemberPointerType(class_clang_type, pointee_clang_type); 1774 1775 byte_size = clang_type.GetByteSize(nullptr); 1776 1777 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, byte_size, NULL, 1778 LLDB_INVALID_UID, Type::eEncodingIsUID, NULL, clang_type, 1779 Type::eResolveStateForward)); 1780 } 1781 1782 break; 1783 } 1784 default: 1785 dwarf->GetObjectFile()->GetModule()->ReportError ("{0x%8.8x}: unhandled type tag 0x%4.4x (%s), please file a bug and attach the file at the start of this error message", 1786 die.GetOffset(), 1787 tag, 1788 DW_TAG_value_to_name(tag)); 1789 break; 1790 } 1791 1792 if (type_sp.get()) 1793 { 1794 DWARFDIE sc_parent_die = SymbolFileDWARF::GetParentSymbolContextDIE(die); 1795 dw_tag_t sc_parent_tag = sc_parent_die.Tag(); 1796 1797 SymbolContextScope * symbol_context_scope = NULL; 1798 if (sc_parent_tag == DW_TAG_compile_unit) 1799 { 1800 symbol_context_scope = sc.comp_unit; 1801 } 1802 else if (sc.function != NULL && sc_parent_die) 1803 { 1804 symbol_context_scope = sc.function->GetBlock(true).FindBlockByID(sc_parent_die.GetID()); 1805 if (symbol_context_scope == NULL) 1806 symbol_context_scope = sc.function; 1807 } 1808 1809 if (symbol_context_scope != NULL) 1810 { 1811 type_sp->SetSymbolContextScope(symbol_context_scope); 1812 } 1813 1814 // We are ready to put this type into the uniqued list up at the module level 1815 type_list->Insert (type_sp); 1816 1817 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1818 } 1819 } 1820 else if (type_ptr != DIE_IS_BEING_PARSED) 1821 { 1822 type_sp = type_ptr->shared_from_this(); 1823 } 1824 } 1825 return type_sp; 1826 } 1827 1828 // DWARF parsing functions 1829 1830 class DWARFASTParserClang::DelayedAddObjCClassProperty 1831 { 1832 public: 1833 DelayedAddObjCClassProperty(const CompilerType &class_opaque_type, 1834 const char *property_name, 1835 const CompilerType &property_opaque_type, // The property type is only required if you don't have an ivar decl 1836 clang::ObjCIvarDecl *ivar_decl, 1837 const char *property_setter_name, 1838 const char *property_getter_name, 1839 uint32_t property_attributes, 1840 const ClangASTMetadata *metadata) : 1841 m_class_opaque_type (class_opaque_type), 1842 m_property_name (property_name), 1843 m_property_opaque_type (property_opaque_type), 1844 m_ivar_decl (ivar_decl), 1845 m_property_setter_name (property_setter_name), 1846 m_property_getter_name (property_getter_name), 1847 m_property_attributes (property_attributes) 1848 { 1849 if (metadata != NULL) 1850 { 1851 m_metadata_ap.reset(new ClangASTMetadata()); 1852 *m_metadata_ap = *metadata; 1853 } 1854 } 1855 1856 DelayedAddObjCClassProperty (const DelayedAddObjCClassProperty &rhs) 1857 { 1858 *this = rhs; 1859 } 1860 1861 DelayedAddObjCClassProperty& operator= (const DelayedAddObjCClassProperty &rhs) 1862 { 1863 m_class_opaque_type = rhs.m_class_opaque_type; 1864 m_property_name = rhs.m_property_name; 1865 m_property_opaque_type = rhs.m_property_opaque_type; 1866 m_ivar_decl = rhs.m_ivar_decl; 1867 m_property_setter_name = rhs.m_property_setter_name; 1868 m_property_getter_name = rhs.m_property_getter_name; 1869 m_property_attributes = rhs.m_property_attributes; 1870 1871 if (rhs.m_metadata_ap.get()) 1872 { 1873 m_metadata_ap.reset (new ClangASTMetadata()); 1874 *m_metadata_ap = *rhs.m_metadata_ap; 1875 } 1876 return *this; 1877 } 1878 1879 bool 1880 Finalize() 1881 { 1882 return ClangASTContext::AddObjCClassProperty (m_class_opaque_type, 1883 m_property_name, 1884 m_property_opaque_type, 1885 m_ivar_decl, 1886 m_property_setter_name, 1887 m_property_getter_name, 1888 m_property_attributes, 1889 m_metadata_ap.get()); 1890 } 1891 1892 private: 1893 CompilerType m_class_opaque_type; 1894 const char *m_property_name; 1895 CompilerType m_property_opaque_type; 1896 clang::ObjCIvarDecl *m_ivar_decl; 1897 const char *m_property_setter_name; 1898 const char *m_property_getter_name; 1899 uint32_t m_property_attributes; 1900 std::unique_ptr<ClangASTMetadata> m_metadata_ap; 1901 }; 1902 1903 bool 1904 DWARFASTParserClang::ParseTemplateDIE (const DWARFDIE &die, 1905 ClangASTContext::TemplateParameterInfos &template_param_infos) 1906 { 1907 const dw_tag_t tag = die.Tag(); 1908 1909 switch (tag) 1910 { 1911 case DW_TAG_template_type_parameter: 1912 case DW_TAG_template_value_parameter: 1913 { 1914 DWARFAttributes attributes; 1915 const size_t num_attributes = die.GetAttributes (attributes); 1916 const char *name = NULL; 1917 Type *lldb_type = NULL; 1918 CompilerType clang_type; 1919 uint64_t uval64 = 0; 1920 bool uval64_valid = false; 1921 if (num_attributes > 0) 1922 { 1923 DWARFFormValue form_value; 1924 for (size_t i=0; i<num_attributes; ++i) 1925 { 1926 const dw_attr_t attr = attributes.AttributeAtIndex(i); 1927 1928 switch (attr) 1929 { 1930 case DW_AT_name: 1931 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1932 name = form_value.AsCString(); 1933 break; 1934 1935 case DW_AT_type: 1936 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1937 { 1938 lldb_type = die.ResolveTypeUID(DIERef(form_value)); 1939 if (lldb_type) 1940 clang_type = lldb_type->GetForwardCompilerType (); 1941 } 1942 break; 1943 1944 case DW_AT_const_value: 1945 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1946 { 1947 uval64_valid = true; 1948 uval64 = form_value.Unsigned(); 1949 } 1950 break; 1951 default: 1952 break; 1953 } 1954 } 1955 1956 clang::ASTContext *ast = m_ast.getASTContext(); 1957 if (!clang_type) 1958 clang_type = m_ast.GetBasicType(eBasicTypeVoid); 1959 1960 if (clang_type) 1961 { 1962 bool is_signed = false; 1963 if (name && name[0]) 1964 template_param_infos.names.push_back(name); 1965 else 1966 template_param_infos.names.push_back(NULL); 1967 1968 if (tag == DW_TAG_template_value_parameter && 1969 lldb_type != NULL && 1970 clang_type.IsIntegerType (is_signed) && 1971 uval64_valid) 1972 { 1973 llvm::APInt apint (lldb_type->GetByteSize() * 8, uval64, is_signed); 1974 template_param_infos.args.push_back( 1975 clang::TemplateArgument(*ast, llvm::APSInt(apint), ClangUtil::GetQualType(clang_type))); 1976 } 1977 else 1978 { 1979 template_param_infos.args.push_back( 1980 clang::TemplateArgument(ClangUtil::GetQualType(clang_type))); 1981 } 1982 } 1983 else 1984 { 1985 return false; 1986 } 1987 1988 } 1989 } 1990 return true; 1991 1992 default: 1993 break; 1994 } 1995 return false; 1996 } 1997 1998 bool 1999 DWARFASTParserClang::ParseTemplateParameterInfos (const DWARFDIE &parent_die, 2000 ClangASTContext::TemplateParameterInfos &template_param_infos) 2001 { 2002 2003 if (!parent_die) 2004 return false; 2005 2006 Args template_parameter_names; 2007 for (DWARFDIE die = parent_die.GetFirstChild(); 2008 die.IsValid(); 2009 die = die.GetSibling()) 2010 { 2011 const dw_tag_t tag = die.Tag(); 2012 2013 switch (tag) 2014 { 2015 case DW_TAG_template_type_parameter: 2016 case DW_TAG_template_value_parameter: 2017 ParseTemplateDIE (die, template_param_infos); 2018 break; 2019 2020 default: 2021 break; 2022 } 2023 } 2024 if (template_param_infos.args.empty()) 2025 return false; 2026 return template_param_infos.args.size() == template_param_infos.names.size(); 2027 } 2028 2029 bool 2030 DWARFASTParserClang::CompleteTypeFromDWARF(const DWARFDIE &die, lldb_private::Type *type, CompilerType &clang_type) 2031 { 2032 SymbolFileDWARF *dwarf = die.GetDWARF(); 2033 2034 lldb_private::Mutex::Locker locker(dwarf->GetObjectFile()->GetModule()->GetMutex()); 2035 2036 // Disable external storage for this type so we don't get anymore 2037 // clang::ExternalASTSource queries for this type. 2038 m_ast.SetHasExternalStorage (clang_type.GetOpaqueQualType(), false); 2039 2040 if (!die) 2041 return false; 2042 2043 const dw_tag_t tag = die.Tag(); 2044 2045 Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION)); 2046 if (log) 2047 dwarf->GetObjectFile()->GetModule()->LogMessageVerboseBacktrace (log, 2048 "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...", 2049 die.GetID(), 2050 die.GetTagAsCString(), 2051 type->GetName().AsCString()); 2052 assert (clang_type); 2053 DWARFAttributes attributes; 2054 switch (tag) 2055 { 2056 case DW_TAG_structure_type: 2057 case DW_TAG_union_type: 2058 case DW_TAG_class_type: 2059 { 2060 ClangASTImporter::LayoutInfo layout_info; 2061 2062 { 2063 if (die.HasChildren()) 2064 { 2065 LanguageType class_language = eLanguageTypeUnknown; 2066 if (ClangASTContext::IsObjCObjectOrInterfaceType(clang_type)) 2067 { 2068 class_language = eLanguageTypeObjC; 2069 // For objective C we don't start the definition when 2070 // the class is created. 2071 ClangASTContext::StartTagDeclarationDefinition (clang_type); 2072 } 2073 2074 int tag_decl_kind = -1; 2075 AccessType default_accessibility = eAccessNone; 2076 if (tag == DW_TAG_structure_type) 2077 { 2078 tag_decl_kind = clang::TTK_Struct; 2079 default_accessibility = eAccessPublic; 2080 } 2081 else if (tag == DW_TAG_union_type) 2082 { 2083 tag_decl_kind = clang::TTK_Union; 2084 default_accessibility = eAccessPublic; 2085 } 2086 else if (tag == DW_TAG_class_type) 2087 { 2088 tag_decl_kind = clang::TTK_Class; 2089 default_accessibility = eAccessPrivate; 2090 } 2091 2092 SymbolContext sc(die.GetLLDBCompileUnit()); 2093 std::vector<clang::CXXBaseSpecifier *> base_classes; 2094 std::vector<int> member_accessibilities; 2095 bool is_a_class = false; 2096 // Parse members and base classes first 2097 DWARFDIECollection member_function_dies; 2098 2099 DelayedPropertyList delayed_properties; 2100 ParseChildMembers (sc, 2101 die, 2102 clang_type, 2103 class_language, 2104 base_classes, 2105 member_accessibilities, 2106 member_function_dies, 2107 delayed_properties, 2108 default_accessibility, 2109 is_a_class, 2110 layout_info); 2111 2112 // Now parse any methods if there were any... 2113 size_t num_functions = member_function_dies.Size(); 2114 if (num_functions > 0) 2115 { 2116 for (size_t i=0; i<num_functions; ++i) 2117 { 2118 dwarf->ResolveType(member_function_dies.GetDIEAtIndex(i)); 2119 } 2120 } 2121 2122 if (class_language == eLanguageTypeObjC) 2123 { 2124 ConstString class_name (clang_type.GetTypeName()); 2125 if (class_name) 2126 { 2127 DIEArray method_die_offsets; 2128 dwarf->GetObjCMethodDIEOffsets(class_name, method_die_offsets); 2129 2130 if (!method_die_offsets.empty()) 2131 { 2132 DWARFDebugInfo* debug_info = dwarf->DebugInfo(); 2133 2134 const size_t num_matches = method_die_offsets.size(); 2135 for (size_t i=0; i<num_matches; ++i) 2136 { 2137 const DIERef& die_ref = method_die_offsets[i]; 2138 DWARFDIE method_die = debug_info->GetDIE (die_ref); 2139 2140 if (method_die) 2141 method_die.ResolveType (); 2142 } 2143 } 2144 2145 for (DelayedPropertyList::iterator pi = delayed_properties.begin(), pe = delayed_properties.end(); 2146 pi != pe; 2147 ++pi) 2148 pi->Finalize(); 2149 } 2150 } 2151 2152 // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we 2153 // need to tell the clang type it is actually a class. 2154 if (class_language != eLanguageTypeObjC) 2155 { 2156 if (is_a_class && tag_decl_kind != clang::TTK_Class) 2157 m_ast.SetTagTypeKind(ClangUtil::GetQualType(clang_type), clang::TTK_Class); 2158 } 2159 2160 // Since DW_TAG_structure_type gets used for both classes 2161 // and structures, we may need to set any DW_TAG_member 2162 // fields to have a "private" access if none was specified. 2163 // When we parsed the child members we tracked that actual 2164 // accessibility value for each DW_TAG_member in the 2165 // "member_accessibilities" array. If the value for the 2166 // member is zero, then it was set to the "default_accessibility" 2167 // which for structs was "public". Below we correct this 2168 // by setting any fields to "private" that weren't correctly 2169 // set. 2170 if (is_a_class && !member_accessibilities.empty()) 2171 { 2172 // This is a class and all members that didn't have 2173 // their access specified are private. 2174 m_ast.SetDefaultAccessForRecordFields (m_ast.GetAsRecordDecl(clang_type), 2175 eAccessPrivate, 2176 &member_accessibilities.front(), 2177 member_accessibilities.size()); 2178 } 2179 2180 if (!base_classes.empty()) 2181 { 2182 // Make sure all base classes refer to complete types and not 2183 // forward declarations. If we don't do this, clang will crash 2184 // with an assertion in the call to clang_type.SetBaseClassesForClassType() 2185 for (auto &base_class : base_classes) 2186 { 2187 clang::TypeSourceInfo *type_source_info = base_class->getTypeSourceInfo(); 2188 if (type_source_info) 2189 { 2190 CompilerType base_class_type (&m_ast, type_source_info->getType().getAsOpaquePtr()); 2191 if (base_class_type.GetCompleteType() == false) 2192 { 2193 auto module = dwarf->GetObjectFile()->GetModule(); 2194 module->ReportError ( 2195 ":: Class '%s' has a base class '%s' which does not have a complete definition.", 2196 die.GetName(), 2197 base_class_type.GetTypeName().GetCString()); 2198 if (die.GetCU()->GetProducer() == DWARFCompileUnit::eProducerClang) 2199 module->ReportError (":: Try compiling the source file with -fno-limit-debug-info."); 2200 2201 // We have no choice other than to pretend that the base class 2202 // is complete. If we don't do this, clang will crash when we 2203 // call setBases() inside of "clang_type.SetBaseClassesForClassType()" 2204 // below. Since we provide layout assistance, all ivars in this 2205 // class and other classes will be fine, this is the best we can do 2206 // short of crashing. 2207 ClangASTContext::StartTagDeclarationDefinition (base_class_type); 2208 ClangASTContext::CompleteTagDeclarationDefinition (base_class_type); 2209 } 2210 } 2211 } 2212 m_ast.SetBaseClassesForClassType (clang_type.GetOpaqueQualType(), 2213 &base_classes.front(), 2214 base_classes.size()); 2215 2216 // Clang will copy each CXXBaseSpecifier in "base_classes" 2217 // so we have to free them all. 2218 ClangASTContext::DeleteBaseClassSpecifiers (&base_classes.front(), 2219 base_classes.size()); 2220 } 2221 } 2222 } 2223 2224 ClangASTContext::BuildIndirectFields (clang_type); 2225 ClangASTContext::CompleteTagDeclarationDefinition (clang_type); 2226 2227 if (!layout_info.field_offsets.empty() || 2228 !layout_info.base_offsets.empty() || 2229 !layout_info.vbase_offsets.empty() ) 2230 { 2231 if (type) 2232 layout_info.bit_size = type->GetByteSize() * 8; 2233 if (layout_info.bit_size == 0) 2234 layout_info.bit_size = die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 0) * 8; 2235 2236 clang::CXXRecordDecl *record_decl = m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 2237 if (record_decl) 2238 { 2239 if (log) 2240 { 2241 ModuleSP module_sp = dwarf->GetObjectFile()->GetModule(); 2242 2243 if (module_sp) 2244 { 2245 module_sp->LogMessage (log, 2246 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) caching layout info for record_decl = %p, bit_size = %" PRIu64 ", alignment = %" PRIu64 ", field_offsets[%u], base_offsets[%u], vbase_offsets[%u])", 2247 static_cast<void*>(clang_type.GetOpaqueQualType()), 2248 static_cast<void*>(record_decl), 2249 layout_info.bit_size, 2250 layout_info.alignment, 2251 static_cast<uint32_t>(layout_info.field_offsets.size()), 2252 static_cast<uint32_t>(layout_info.base_offsets.size()), 2253 static_cast<uint32_t>(layout_info.vbase_offsets.size())); 2254 2255 uint32_t idx; 2256 { 2257 llvm::DenseMap<const clang::FieldDecl *, uint64_t>::const_iterator pos, 2258 end = layout_info.field_offsets.end(); 2259 for (idx = 0, pos = layout_info.field_offsets.begin(); pos != end; ++pos, ++idx) 2260 { 2261 module_sp->LogMessage(log, 2262 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) field[%u] = { bit_offset=%u, name='%s' }", 2263 static_cast<void *>(clang_type.GetOpaqueQualType()), 2264 idx, 2265 static_cast<uint32_t>(pos->second), 2266 pos->first->getNameAsString().c_str()); 2267 } 2268 } 2269 2270 { 2271 llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits>::const_iterator base_pos, 2272 base_end = layout_info.base_offsets.end(); 2273 for (idx = 0, base_pos = layout_info.base_offsets.begin(); base_pos != base_end; ++base_pos, ++idx) 2274 { 2275 module_sp->LogMessage(log, 2276 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) base[%u] = { byte_offset=%u, name='%s' }", 2277 clang_type.GetOpaqueQualType(), idx, (uint32_t)base_pos->second.getQuantity(), 2278 base_pos->first->getNameAsString().c_str()); 2279 } 2280 } 2281 { 2282 llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits>::const_iterator vbase_pos, 2283 vbase_end = layout_info.vbase_offsets.end(); 2284 for (idx = 0, vbase_pos = layout_info.vbase_offsets.begin(); vbase_pos != vbase_end; ++vbase_pos, ++idx) 2285 { 2286 module_sp->LogMessage(log, 2287 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) vbase[%u] = { byte_offset=%u, name='%s' }", 2288 static_cast<void *>(clang_type.GetOpaqueQualType()), idx, 2289 static_cast<uint32_t>(vbase_pos->second.getQuantity()), 2290 vbase_pos->first->getNameAsString().c_str()); 2291 } 2292 } 2293 2294 } 2295 } 2296 GetClangASTImporter().InsertRecordDecl(record_decl, layout_info); 2297 } 2298 } 2299 } 2300 2301 return (bool)clang_type; 2302 2303 case DW_TAG_enumeration_type: 2304 ClangASTContext::StartTagDeclarationDefinition (clang_type); 2305 if (die.HasChildren()) 2306 { 2307 SymbolContext sc(die.GetLLDBCompileUnit()); 2308 bool is_signed = false; 2309 clang_type.IsIntegerType(is_signed); 2310 ParseChildEnumerators(sc, clang_type, is_signed, type->GetByteSize(), die); 2311 } 2312 ClangASTContext::CompleteTagDeclarationDefinition (clang_type); 2313 return (bool)clang_type; 2314 2315 default: 2316 assert(false && "not a forward clang type decl!"); 2317 break; 2318 } 2319 2320 return false; 2321 } 2322 2323 std::vector<DWARFDIE> 2324 DWARFASTParserClang::GetDIEForDeclContext(lldb_private::CompilerDeclContext decl_context) 2325 { 2326 std::vector<DWARFDIE> result; 2327 for (auto it = m_decl_ctx_to_die.find((clang::DeclContext *)decl_context.GetOpaqueDeclContext()); it != m_decl_ctx_to_die.end(); it++) 2328 result.push_back(it->second); 2329 return result; 2330 } 2331 2332 CompilerDecl 2333 DWARFASTParserClang::GetDeclForUIDFromDWARF (const DWARFDIE &die) 2334 { 2335 clang::Decl *clang_decl = GetClangDeclForDIE(die); 2336 if (clang_decl != nullptr) 2337 return CompilerDecl(&m_ast, clang_decl); 2338 return CompilerDecl(); 2339 } 2340 2341 CompilerDeclContext 2342 DWARFASTParserClang::GetDeclContextForUIDFromDWARF (const DWARFDIE &die) 2343 { 2344 clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE (die); 2345 if (clang_decl_ctx) 2346 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2347 return CompilerDeclContext(); 2348 } 2349 2350 CompilerDeclContext 2351 DWARFASTParserClang::GetDeclContextContainingUIDFromDWARF (const DWARFDIE &die) 2352 { 2353 clang::DeclContext *clang_decl_ctx = GetClangDeclContextContainingDIE (die, nullptr); 2354 if (clang_decl_ctx) 2355 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2356 return CompilerDeclContext(); 2357 } 2358 2359 size_t 2360 DWARFASTParserClang::ParseChildEnumerators (const SymbolContext& sc, 2361 lldb_private::CompilerType &clang_type, 2362 bool is_signed, 2363 uint32_t enumerator_byte_size, 2364 const DWARFDIE &parent_die) 2365 { 2366 if (!parent_die) 2367 return 0; 2368 2369 size_t enumerators_added = 0; 2370 2371 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); die = die.GetSibling()) 2372 { 2373 const dw_tag_t tag = die.Tag(); 2374 if (tag == DW_TAG_enumerator) 2375 { 2376 DWARFAttributes attributes; 2377 const size_t num_child_attributes = die.GetAttributes(attributes); 2378 if (num_child_attributes > 0) 2379 { 2380 const char *name = NULL; 2381 bool got_value = false; 2382 int64_t enum_value = 0; 2383 Declaration decl; 2384 2385 uint32_t i; 2386 for (i=0; i<num_child_attributes; ++i) 2387 { 2388 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2389 DWARFFormValue form_value; 2390 if (attributes.ExtractFormValueAtIndex(i, form_value)) 2391 { 2392 switch (attr) 2393 { 2394 case DW_AT_const_value: 2395 got_value = true; 2396 if (is_signed) 2397 enum_value = form_value.Signed(); 2398 else 2399 enum_value = form_value.Unsigned(); 2400 break; 2401 2402 case DW_AT_name: 2403 name = form_value.AsCString(); 2404 break; 2405 2406 case DW_AT_description: 2407 default: 2408 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 2409 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 2410 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 2411 case DW_AT_sibling: 2412 break; 2413 } 2414 } 2415 } 2416 2417 if (name && name[0] && got_value) 2418 { 2419 m_ast.AddEnumerationValueToEnumerationType (clang_type.GetOpaqueQualType(), 2420 m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType()), 2421 decl, 2422 name, 2423 enum_value, 2424 enumerator_byte_size * 8); 2425 ++enumerators_added; 2426 } 2427 } 2428 } 2429 } 2430 return enumerators_added; 2431 } 2432 2433 #if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE) 2434 2435 class DIEStack 2436 { 2437 public: 2438 2439 void Push (const DWARFDIE &die) 2440 { 2441 m_dies.push_back (die); 2442 } 2443 2444 2445 void LogDIEs (Log *log) 2446 { 2447 StreamString log_strm; 2448 const size_t n = m_dies.size(); 2449 log_strm.Printf("DIEStack[%" PRIu64 "]:\n", (uint64_t)n); 2450 for (size_t i=0; i<n; i++) 2451 { 2452 std::string qualified_name; 2453 const DWARFDIE &die = m_dies[i]; 2454 die.GetQualifiedName(qualified_name); 2455 log_strm.Printf ("[%" PRIu64 "] 0x%8.8x: %s name='%s'\n", 2456 (uint64_t)i, 2457 die.GetOffset(), 2458 die.GetTagAsCString(), 2459 qualified_name.c_str()); 2460 } 2461 log->PutCString(log_strm.GetData()); 2462 } 2463 void Pop () 2464 { 2465 m_dies.pop_back(); 2466 } 2467 2468 class ScopedPopper 2469 { 2470 public: 2471 ScopedPopper (DIEStack &die_stack) : 2472 m_die_stack (die_stack), 2473 m_valid (false) 2474 { 2475 } 2476 2477 void 2478 Push (const DWARFDIE &die) 2479 { 2480 m_valid = true; 2481 m_die_stack.Push (die); 2482 } 2483 2484 ~ScopedPopper () 2485 { 2486 if (m_valid) 2487 m_die_stack.Pop(); 2488 } 2489 2490 2491 2492 protected: 2493 DIEStack &m_die_stack; 2494 bool m_valid; 2495 }; 2496 2497 protected: 2498 typedef std::vector<DWARFDIE> Stack; 2499 Stack m_dies; 2500 }; 2501 #endif 2502 2503 Function * 2504 DWARFASTParserClang::ParseFunctionFromDWARF (const SymbolContext& sc, 2505 const DWARFDIE &die) 2506 { 2507 DWARFRangeList func_ranges; 2508 const char *name = NULL; 2509 const char *mangled = NULL; 2510 int decl_file = 0; 2511 int decl_line = 0; 2512 int decl_column = 0; 2513 int call_file = 0; 2514 int call_line = 0; 2515 int call_column = 0; 2516 DWARFExpression frame_base(die.GetCU()); 2517 2518 const dw_tag_t tag = die.Tag(); 2519 2520 if (tag != DW_TAG_subprogram) 2521 return NULL; 2522 2523 if (die.GetDIENamesAndRanges (name, 2524 mangled, 2525 func_ranges, 2526 decl_file, 2527 decl_line, 2528 decl_column, 2529 call_file, 2530 call_line, 2531 call_column, 2532 &frame_base)) 2533 { 2534 2535 // Union of all ranges in the function DIE (if the function is discontiguous) 2536 AddressRange func_range; 2537 lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase (0); 2538 lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd (0); 2539 if (lowest_func_addr != LLDB_INVALID_ADDRESS && lowest_func_addr <= highest_func_addr) 2540 { 2541 ModuleSP module_sp (die.GetModule()); 2542 func_range.GetBaseAddress().ResolveAddressUsingFileSections (lowest_func_addr, module_sp->GetSectionList()); 2543 if (func_range.GetBaseAddress().IsValid()) 2544 func_range.SetByteSize(highest_func_addr - lowest_func_addr); 2545 } 2546 2547 if (func_range.GetBaseAddress().IsValid()) 2548 { 2549 Mangled func_name; 2550 if (mangled) 2551 func_name.SetValue(ConstString(mangled), true); 2552 else if (die.GetParent().Tag() == DW_TAG_compile_unit && 2553 Language::LanguageIsCPlusPlus(die.GetLanguage()) && 2554 name && strcmp(name, "main") != 0) 2555 { 2556 // If the mangled name is not present in the DWARF, generate the demangled name 2557 // using the decl context. We skip if the function is "main" as its name is 2558 // never mangled. 2559 bool is_static = false; 2560 bool is_variadic = false; 2561 bool has_template_params = false; 2562 unsigned type_quals = 0; 2563 std::vector<CompilerType> param_types; 2564 std::vector<clang::ParmVarDecl*> param_decls; 2565 DWARFDeclContext decl_ctx; 2566 StreamString sstr; 2567 2568 die.GetDWARFDeclContext(decl_ctx); 2569 sstr << decl_ctx.GetQualifiedName(); 2570 2571 clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE(die, nullptr); 2572 ParseChildParameters(sc, 2573 containing_decl_ctx, 2574 die, 2575 true, 2576 is_static, 2577 is_variadic, 2578 has_template_params, 2579 param_types, 2580 param_decls, 2581 type_quals); 2582 sstr << "("; 2583 for (size_t i = 0; i < param_types.size(); i++) 2584 { 2585 if (i > 0) 2586 sstr << ", "; 2587 sstr << param_types[i].GetTypeName(); 2588 } 2589 if (is_variadic) 2590 sstr << ", ..."; 2591 sstr << ")"; 2592 if (type_quals & clang::Qualifiers::Const) 2593 sstr << " const"; 2594 2595 func_name.SetValue(ConstString(sstr.GetData()), false); 2596 } 2597 else 2598 func_name.SetValue(ConstString(name), false); 2599 2600 FunctionSP func_sp; 2601 std::unique_ptr<Declaration> decl_ap; 2602 if (decl_file != 0 || decl_line != 0 || decl_column != 0) 2603 decl_ap.reset(new Declaration (sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file), 2604 decl_line, 2605 decl_column)); 2606 2607 SymbolFileDWARF *dwarf = die.GetDWARF(); 2608 // Supply the type _only_ if it has already been parsed 2609 Type *func_type = dwarf->GetDIEToType().lookup (die.GetDIE()); 2610 2611 assert(func_type == NULL || func_type != DIE_IS_BEING_PARSED); 2612 2613 if (dwarf->FixupAddress (func_range.GetBaseAddress())) 2614 { 2615 const user_id_t func_user_id = die.GetID(); 2616 func_sp.reset(new Function (sc.comp_unit, 2617 func_user_id, // UserID is the DIE offset 2618 func_user_id, 2619 func_name, 2620 func_type, 2621 func_range)); // first address range 2622 2623 if (func_sp.get() != NULL) 2624 { 2625 if (frame_base.IsValid()) 2626 func_sp->GetFrameBaseExpression() = frame_base; 2627 sc.comp_unit->AddFunction(func_sp); 2628 return func_sp.get(); 2629 } 2630 } 2631 } 2632 } 2633 return NULL; 2634 } 2635 2636 bool 2637 DWARFASTParserClang::ParseChildMembers(const SymbolContext &sc, const DWARFDIE &parent_die, 2638 CompilerType &class_clang_type, const LanguageType class_language, 2639 std::vector<clang::CXXBaseSpecifier *> &base_classes, 2640 std::vector<int> &member_accessibilities, 2641 DWARFDIECollection &member_function_dies, 2642 DelayedPropertyList &delayed_properties, AccessType &default_accessibility, 2643 bool &is_a_class, ClangASTImporter::LayoutInfo &layout_info) 2644 { 2645 if (!parent_die) 2646 return 0; 2647 2648 // Get the parent byte size so we can verify any members will fit 2649 const uint64_t parent_byte_size = parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, UINT64_MAX) * 8; 2650 const uint64_t parent_bit_size = parent_byte_size == UINT64_MAX ? UINT64_MAX : parent_byte_size * 8; 2651 2652 uint32_t member_idx = 0; 2653 BitfieldInfo last_field_info; 2654 2655 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule(); 2656 ClangASTContext *ast = llvm::dyn_cast_or_null<ClangASTContext>(class_clang_type.GetTypeSystem()); 2657 if (ast == nullptr) 2658 return 0; 2659 2660 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); die = die.GetSibling()) 2661 { 2662 dw_tag_t tag = die.Tag(); 2663 2664 switch (tag) 2665 { 2666 case DW_TAG_member: 2667 case DW_TAG_APPLE_property: 2668 { 2669 DWARFAttributes attributes; 2670 const size_t num_attributes = die.GetAttributes (attributes); 2671 if (num_attributes > 0) 2672 { 2673 Declaration decl; 2674 //DWARFExpression location; 2675 const char *name = NULL; 2676 const char *prop_name = NULL; 2677 const char *prop_getter_name = NULL; 2678 const char *prop_setter_name = NULL; 2679 uint32_t prop_attributes = 0; 2680 2681 2682 bool is_artificial = false; 2683 DWARFFormValue encoding_form; 2684 AccessType accessibility = eAccessNone; 2685 uint32_t member_byte_offset = (parent_die.Tag() == DW_TAG_union_type) ? 0 : UINT32_MAX; 2686 size_t byte_size = 0; 2687 int64_t bit_offset = 0; 2688 size_t bit_size = 0; 2689 bool is_external = false; // On DW_TAG_members, this means the member is static 2690 uint32_t i; 2691 for (i=0; i<num_attributes && !is_artificial; ++i) 2692 { 2693 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2694 DWARFFormValue form_value; 2695 if (attributes.ExtractFormValueAtIndex(i, form_value)) 2696 { 2697 switch (attr) 2698 { 2699 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 2700 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 2701 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 2702 case DW_AT_name: name = form_value.AsCString(); break; 2703 case DW_AT_type: encoding_form = form_value; break; 2704 case DW_AT_bit_offset: bit_offset = form_value.Signed(); break; 2705 case DW_AT_bit_size: bit_size = form_value.Unsigned(); break; 2706 case DW_AT_byte_size: byte_size = form_value.Unsigned(); break; 2707 case DW_AT_data_member_location: 2708 if (form_value.BlockData()) 2709 { 2710 Value initialValue(0); 2711 Value memberOffset(0); 2712 const DWARFDataExtractor& debug_info_data = die.GetDWARF()->get_debug_info_data(); 2713 uint32_t block_length = form_value.Unsigned(); 2714 uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart(); 2715 if (DWARFExpression::Evaluate(nullptr, // ExecutionContext * 2716 nullptr, // ClangExpressionVariableList * 2717 nullptr, // ClangExpressionDeclMap * 2718 nullptr, // RegisterContext * 2719 module_sp, 2720 debug_info_data, 2721 die.GetCU(), 2722 block_offset, 2723 block_length, 2724 eRegisterKindDWARF, 2725 &initialValue, 2726 nullptr, 2727 memberOffset, 2728 nullptr)) 2729 { 2730 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 2731 } 2732 } 2733 else 2734 { 2735 // With DWARF 3 and later, if the value is an integer constant, 2736 // this form value is the offset in bytes from the beginning 2737 // of the containing entity. 2738 member_byte_offset = form_value.Unsigned(); 2739 } 2740 break; 2741 2742 case DW_AT_accessibility: accessibility = DW_ACCESS_to_AccessType (form_value.Unsigned()); break; 2743 case DW_AT_artificial: is_artificial = form_value.Boolean(); break; 2744 case DW_AT_APPLE_property_name: prop_name = form_value.AsCString(); 2745 break; 2746 case DW_AT_APPLE_property_getter: prop_getter_name = form_value.AsCString(); 2747 break; 2748 case DW_AT_APPLE_property_setter: prop_setter_name = form_value.AsCString(); 2749 break; 2750 case DW_AT_APPLE_property_attribute: prop_attributes = form_value.Unsigned(); break; 2751 case DW_AT_external: is_external = form_value.Boolean(); break; 2752 2753 default: 2754 case DW_AT_declaration: 2755 case DW_AT_description: 2756 case DW_AT_mutable: 2757 case DW_AT_visibility: 2758 case DW_AT_sibling: 2759 break; 2760 } 2761 } 2762 } 2763 2764 if (prop_name) 2765 { 2766 ConstString fixed_getter; 2767 ConstString fixed_setter; 2768 2769 // Check if the property getter/setter were provided as full 2770 // names. We want basenames, so we extract them. 2771 2772 if (prop_getter_name && prop_getter_name[0] == '-') 2773 { 2774 ObjCLanguage::MethodName prop_getter_method(prop_getter_name, true); 2775 prop_getter_name = prop_getter_method.GetSelector().GetCString(); 2776 } 2777 2778 if (prop_setter_name && prop_setter_name[0] == '-') 2779 { 2780 ObjCLanguage::MethodName prop_setter_method(prop_setter_name, true); 2781 prop_setter_name = prop_setter_method.GetSelector().GetCString(); 2782 } 2783 2784 // If the names haven't been provided, they need to be 2785 // filled in. 2786 2787 if (!prop_getter_name) 2788 { 2789 prop_getter_name = prop_name; 2790 } 2791 if (!prop_setter_name && prop_name[0] && !(prop_attributes & DW_APPLE_PROPERTY_readonly)) 2792 { 2793 StreamString ss; 2794 2795 ss.Printf("set%c%s:", 2796 toupper(prop_name[0]), 2797 &prop_name[1]); 2798 2799 fixed_setter.SetCString(ss.GetData()); 2800 prop_setter_name = fixed_setter.GetCString(); 2801 } 2802 } 2803 2804 // Clang has a DWARF generation bug where sometimes it 2805 // represents fields that are references with bad byte size 2806 // and bit size/offset information such as: 2807 // 2808 // DW_AT_byte_size( 0x00 ) 2809 // DW_AT_bit_size( 0x40 ) 2810 // DW_AT_bit_offset( 0xffffffffffffffc0 ) 2811 // 2812 // So check the bit offset to make sure it is sane, and if 2813 // the values are not sane, remove them. If we don't do this 2814 // then we will end up with a crash if we try to use this 2815 // type in an expression when clang becomes unhappy with its 2816 // recycled debug info. 2817 2818 if (byte_size == 0 && bit_offset < 0) 2819 { 2820 bit_size = 0; 2821 bit_offset = 0; 2822 } 2823 2824 // FIXME: Make Clang ignore Objective-C accessibility for expressions 2825 if (class_language == eLanguageTypeObjC || 2826 class_language == eLanguageTypeObjC_plus_plus) 2827 accessibility = eAccessNone; 2828 2829 if (member_idx == 0 && !is_artificial && name && (strstr (name, "_vptr$") == name)) 2830 { 2831 // Not all compilers will mark the vtable pointer 2832 // member as artificial (llvm-gcc). We can't have 2833 // the virtual members in our classes otherwise it 2834 // throws off all child offsets since we end up 2835 // having and extra pointer sized member in our 2836 // class layouts. 2837 is_artificial = true; 2838 } 2839 2840 // Handle static members 2841 if (is_external && member_byte_offset == UINT32_MAX) 2842 { 2843 Type *var_type = die.ResolveTypeUID(DIERef(encoding_form)); 2844 2845 if (var_type) 2846 { 2847 if (accessibility == eAccessNone) 2848 accessibility = eAccessPublic; 2849 ClangASTContext::AddVariableToRecordType (class_clang_type, 2850 name, 2851 var_type->GetLayoutCompilerType (), 2852 accessibility); 2853 } 2854 break; 2855 } 2856 2857 if (is_artificial == false) 2858 { 2859 Type *member_type = die.ResolveTypeUID(DIERef(encoding_form)); 2860 2861 clang::FieldDecl *field_decl = NULL; 2862 if (tag == DW_TAG_member) 2863 { 2864 if (member_type) 2865 { 2866 if (accessibility == eAccessNone) 2867 accessibility = default_accessibility; 2868 member_accessibilities.push_back(accessibility); 2869 2870 uint64_t field_bit_offset = (member_byte_offset == UINT32_MAX ? 0 : (member_byte_offset * 8)); 2871 if (bit_size > 0) 2872 { 2873 2874 BitfieldInfo this_field_info; 2875 this_field_info.bit_offset = field_bit_offset; 2876 this_field_info.bit_size = bit_size; 2877 2878 ///////////////////////////////////////////////////////////// 2879 // How to locate a field given the DWARF debug information 2880 // 2881 // AT_byte_size indicates the size of the word in which the 2882 // bit offset must be interpreted. 2883 // 2884 // AT_data_member_location indicates the byte offset of the 2885 // word from the base address of the structure. 2886 // 2887 // AT_bit_offset indicates how many bits into the word 2888 // (according to the host endianness) the low-order bit of 2889 // the field starts. AT_bit_offset can be negative. 2890 // 2891 // AT_bit_size indicates the size of the field in bits. 2892 ///////////////////////////////////////////////////////////// 2893 2894 if (byte_size == 0) 2895 byte_size = member_type->GetByteSize(); 2896 2897 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 2898 if (objfile->GetByteOrder() == eByteOrderLittle) 2899 { 2900 this_field_info.bit_offset += byte_size * 8; 2901 this_field_info.bit_offset -= (bit_offset + bit_size); 2902 2903 if (this_field_info.bit_offset >= parent_bit_size) 2904 { 2905 objfile->GetModule()->ReportWarning("0x%8.8" PRIx64 ": %s bitfield named \"%s\" has invalid bit offset (0x%8.8" PRIx64 ") member will be ignored. Please file a bug against the compiler and include the preprocessed output for %s\n", 2906 die.GetID(), 2907 DW_TAG_value_to_name(tag), 2908 name, 2909 this_field_info.bit_offset, 2910 sc.comp_unit ? sc.comp_unit->GetPath().c_str() : "the source file"); 2911 this_field_info.Clear(); 2912 continue; 2913 } 2914 } 2915 else 2916 { 2917 this_field_info.bit_offset += bit_offset; 2918 } 2919 2920 // Update the field bit offset we will report for layout 2921 field_bit_offset = this_field_info.bit_offset; 2922 2923 // If the member to be emitted did not start on a character boundary and there is 2924 // empty space between the last field and this one, then we need to emit an 2925 // anonymous member filling up the space up to its start. There are three cases 2926 // here: 2927 // 2928 // 1 If the previous member ended on a character boundary, then we can emit an 2929 // anonymous member starting at the most recent character boundary. 2930 // 2931 // 2 If the previous member did not end on a character boundary and the distance 2932 // from the end of the previous member to the current member is less than a 2933 // word width, then we can emit an anonymous member starting right after the 2934 // previous member and right before this member. 2935 // 2936 // 3 If the previous member did not end on a character boundary and the distance 2937 // from the end of the previous member to the current member is greater than 2938 // or equal a word width, then we act as in Case 1. 2939 2940 const uint64_t character_width = 8; 2941 const uint64_t word_width = 32; 2942 2943 // Objective-C has invalid DW_AT_bit_offset values in older versions 2944 // of clang, so we have to be careful and only insert unnamed bitfields 2945 // if we have a new enough clang. 2946 bool detect_unnamed_bitfields = true; 2947 2948 if (class_language == eLanguageTypeObjC || class_language == eLanguageTypeObjC_plus_plus) 2949 detect_unnamed_bitfields = die.GetCU()->Supports_unnamed_objc_bitfields (); 2950 2951 if (detect_unnamed_bitfields) 2952 { 2953 BitfieldInfo anon_field_info; 2954 2955 if ((this_field_info.bit_offset % character_width) != 0) // not char aligned 2956 { 2957 uint64_t last_field_end = 0; 2958 2959 if (last_field_info.IsValid()) 2960 last_field_end = last_field_info.bit_offset + last_field_info.bit_size; 2961 2962 if (this_field_info.bit_offset != last_field_end) 2963 { 2964 if (((last_field_end % character_width) == 0) || // case 1 2965 (this_field_info.bit_offset - last_field_end >= word_width)) // case 3 2966 { 2967 anon_field_info.bit_size = this_field_info.bit_offset % character_width; 2968 anon_field_info.bit_offset = this_field_info.bit_offset - anon_field_info.bit_size; 2969 } 2970 else // case 2 2971 { 2972 anon_field_info.bit_size = this_field_info.bit_offset - last_field_end; 2973 anon_field_info.bit_offset = last_field_end; 2974 } 2975 } 2976 } 2977 2978 if (anon_field_info.IsValid()) 2979 { 2980 clang::FieldDecl *unnamed_bitfield_decl = 2981 ClangASTContext::AddFieldToRecordType (class_clang_type, 2982 NULL, 2983 m_ast.GetBuiltinTypeForEncodingAndBitSize(eEncodingSint, word_width), 2984 accessibility, 2985 anon_field_info.bit_size); 2986 2987 layout_info.field_offsets.insert( 2988 std::make_pair(unnamed_bitfield_decl, anon_field_info.bit_offset)); 2989 } 2990 } 2991 last_field_info = this_field_info; 2992 } 2993 else 2994 { 2995 last_field_info.Clear(); 2996 } 2997 2998 CompilerType member_clang_type = member_type->GetLayoutCompilerType (); 2999 if (!member_clang_type.IsCompleteType()) 3000 member_clang_type.GetCompleteType(); 3001 3002 { 3003 // Older versions of clang emit array[0] and array[1] in the same way (<rdar://problem/12566646>). 3004 // If the current field is at the end of the structure, then there is definitely no room for extra 3005 // elements and we override the type to array[0]. 3006 3007 CompilerType member_array_element_type; 3008 uint64_t member_array_size; 3009 bool member_array_is_incomplete; 3010 3011 if (member_clang_type.IsArrayType(&member_array_element_type, 3012 &member_array_size, 3013 &member_array_is_incomplete) && 3014 !member_array_is_incomplete) 3015 { 3016 uint64_t parent_byte_size = parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, UINT64_MAX); 3017 3018 if (member_byte_offset >= parent_byte_size) 3019 { 3020 if (member_array_size != 1 && (member_array_size != 0 || member_byte_offset > parent_byte_size)) 3021 { 3022 module_sp->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 " which extends beyond the bounds of 0x%8.8" PRIx64, 3023 die.GetID(), 3024 name, 3025 encoding_form.Reference(), 3026 parent_die.GetID()); 3027 } 3028 3029 member_clang_type = m_ast.CreateArrayType(member_array_element_type, 0, false); 3030 } 3031 } 3032 } 3033 3034 if (ClangASTContext::IsCXXClassType(member_clang_type) && member_clang_type.GetCompleteType() == false) 3035 { 3036 if (die.GetCU()->GetProducer() == DWARFCompileUnit::eProducerClang) 3037 module_sp->ReportError ("DWARF DIE at 0x%8.8x (class %s) has a member variable 0x%8.8x (%s) whose type is a forward declaration, not a complete definition.\nTry compiling the source file with -fno-limit-debug-info", 3038 parent_die.GetOffset(), 3039 parent_die.GetName(), 3040 die.GetOffset(), 3041 name); 3042 else 3043 module_sp->ReportError ("DWARF DIE at 0x%8.8x (class %s) has a member variable 0x%8.8x (%s) whose type is a forward declaration, not a complete definition.\nPlease file a bug against the compiler and include the preprocessed output for %s", 3044 parent_die.GetOffset(), 3045 parent_die.GetName(), 3046 die.GetOffset(), 3047 name, 3048 sc.comp_unit ? sc.comp_unit->GetPath().c_str() : "the source file"); 3049 // We have no choice other than to pretend that the member class 3050 // is complete. If we don't do this, clang will crash when trying 3051 // to layout the class. Since we provide layout assistance, all 3052 // ivars in this class and other classes will be fine, this is 3053 // the best we can do short of crashing. 3054 ClangASTContext::StartTagDeclarationDefinition(member_clang_type); 3055 ClangASTContext::CompleteTagDeclarationDefinition(member_clang_type); 3056 } 3057 3058 field_decl = ClangASTContext::AddFieldToRecordType (class_clang_type, 3059 name, 3060 member_clang_type, 3061 accessibility, 3062 bit_size); 3063 3064 m_ast.SetMetadataAsUserID (field_decl, die.GetID()); 3065 3066 layout_info.field_offsets.insert(std::make_pair(field_decl, field_bit_offset)); 3067 } 3068 else 3069 { 3070 if (name) 3071 module_sp->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 " which was unable to be parsed", 3072 die.GetID(), 3073 name, 3074 encoding_form.Reference()); 3075 else 3076 module_sp->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member refers to type 0x%8.8" PRIx64 " which was unable to be parsed", 3077 die.GetID(), 3078 encoding_form.Reference()); 3079 } 3080 } 3081 3082 if (prop_name != NULL && member_type) 3083 { 3084 clang::ObjCIvarDecl *ivar_decl = NULL; 3085 3086 if (field_decl) 3087 { 3088 ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl); 3089 assert (ivar_decl != NULL); 3090 } 3091 3092 ClangASTMetadata metadata; 3093 metadata.SetUserID (die.GetID()); 3094 delayed_properties.push_back(DelayedAddObjCClassProperty(class_clang_type, 3095 prop_name, 3096 member_type->GetLayoutCompilerType (), 3097 ivar_decl, 3098 prop_setter_name, 3099 prop_getter_name, 3100 prop_attributes, 3101 &metadata)); 3102 3103 if (ivar_decl) 3104 m_ast.SetMetadataAsUserID (ivar_decl, die.GetID()); 3105 } 3106 } 3107 } 3108 ++member_idx; 3109 } 3110 break; 3111 3112 case DW_TAG_subprogram: 3113 // Let the type parsing code handle this one for us. 3114 member_function_dies.Append (die); 3115 break; 3116 3117 case DW_TAG_inheritance: 3118 { 3119 is_a_class = true; 3120 if (default_accessibility == eAccessNone) 3121 default_accessibility = eAccessPrivate; 3122 // TODO: implement DW_TAG_inheritance type parsing 3123 DWARFAttributes attributes; 3124 const size_t num_attributes = die.GetAttributes (attributes); 3125 if (num_attributes > 0) 3126 { 3127 Declaration decl; 3128 DWARFExpression location(die.GetCU()); 3129 DWARFFormValue encoding_form; 3130 AccessType accessibility = default_accessibility; 3131 bool is_virtual = false; 3132 bool is_base_of_class = true; 3133 off_t member_byte_offset = 0; 3134 uint32_t i; 3135 for (i=0; i<num_attributes; ++i) 3136 { 3137 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3138 DWARFFormValue form_value; 3139 if (attributes.ExtractFormValueAtIndex(i, form_value)) 3140 { 3141 switch (attr) 3142 { 3143 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 3144 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 3145 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 3146 case DW_AT_type: encoding_form = form_value; break; 3147 case DW_AT_data_member_location: 3148 if (form_value.BlockData()) 3149 { 3150 Value initialValue(0); 3151 Value memberOffset(0); 3152 const DWARFDataExtractor& debug_info_data = die.GetDWARF()->get_debug_info_data(); 3153 uint32_t block_length = form_value.Unsigned(); 3154 uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart(); 3155 if (DWARFExpression::Evaluate (nullptr, 3156 nullptr, 3157 nullptr, 3158 nullptr, 3159 module_sp, 3160 debug_info_data, 3161 die.GetCU(), 3162 block_offset, 3163 block_length, 3164 eRegisterKindDWARF, 3165 &initialValue, 3166 nullptr, 3167 memberOffset, 3168 nullptr)) 3169 { 3170 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 3171 } 3172 } 3173 else 3174 { 3175 // With DWARF 3 and later, if the value is an integer constant, 3176 // this form value is the offset in bytes from the beginning 3177 // of the containing entity. 3178 member_byte_offset = form_value.Unsigned(); 3179 } 3180 break; 3181 3182 case DW_AT_accessibility: 3183 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 3184 break; 3185 3186 case DW_AT_virtuality: 3187 is_virtual = form_value.Boolean(); 3188 break; 3189 3190 case DW_AT_sibling: 3191 break; 3192 3193 default: 3194 break; 3195 } 3196 } 3197 } 3198 3199 Type *base_class_type = die.ResolveTypeUID(DIERef(encoding_form)); 3200 if (base_class_type == NULL) 3201 { 3202 module_sp->ReportError("0x%8.8x: DW_TAG_inheritance failed to resolve the base class at 0x%8.8" PRIx64 " from enclosing type 0x%8.8x. \nPlease file a bug and attach the file at the start of this error message", 3203 die.GetOffset(), 3204 encoding_form.Reference(), 3205 parent_die.GetOffset()); 3206 break; 3207 } 3208 3209 CompilerType base_class_clang_type = base_class_type->GetFullCompilerType (); 3210 assert (base_class_clang_type); 3211 if (class_language == eLanguageTypeObjC) 3212 { 3213 ast->SetObjCSuperClass(class_clang_type, base_class_clang_type); 3214 } 3215 else 3216 { 3217 base_classes.push_back (ast->CreateBaseClassSpecifier (base_class_clang_type.GetOpaqueQualType(), 3218 accessibility, 3219 is_virtual, 3220 is_base_of_class)); 3221 3222 if (is_virtual) 3223 { 3224 // Do not specify any offset for virtual inheritance. The DWARF produced by clang doesn't 3225 // give us a constant offset, but gives us a DWARF expressions that requires an actual object 3226 // in memory. the DW_AT_data_member_location for a virtual base class looks like: 3227 // DW_AT_data_member_location( DW_OP_dup, DW_OP_deref, DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref, DW_OP_plus ) 3228 // Given this, there is really no valid response we can give to clang for virtual base 3229 // class offsets, and this should eventually be removed from LayoutRecordType() in the external 3230 // AST source in clang. 3231 } 3232 else 3233 { 3234 layout_info.base_offsets.insert( 3235 std::make_pair(ast->GetAsCXXRecordDecl(base_class_clang_type.GetOpaqueQualType()), 3236 clang::CharUnits::fromQuantity(member_byte_offset))); 3237 } 3238 } 3239 } 3240 } 3241 break; 3242 3243 default: 3244 break; 3245 } 3246 } 3247 3248 return true; 3249 } 3250 3251 3252 size_t 3253 DWARFASTParserClang::ParseChildParameters (const SymbolContext& sc, 3254 clang::DeclContext *containing_decl_ctx, 3255 const DWARFDIE &parent_die, 3256 bool skip_artificial, 3257 bool &is_static, 3258 bool &is_variadic, 3259 bool &has_template_params, 3260 std::vector<CompilerType>& function_param_types, 3261 std::vector<clang::ParmVarDecl*>& function_param_decls, 3262 unsigned &type_quals) 3263 { 3264 if (!parent_die) 3265 return 0; 3266 3267 size_t arg_idx = 0; 3268 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); die = die.GetSibling()) 3269 { 3270 const dw_tag_t tag = die.Tag(); 3271 switch (tag) 3272 { 3273 case DW_TAG_formal_parameter: 3274 { 3275 DWARFAttributes attributes; 3276 const size_t num_attributes = die.GetAttributes(attributes); 3277 if (num_attributes > 0) 3278 { 3279 const char *name = NULL; 3280 Declaration decl; 3281 DWARFFormValue param_type_die_form; 3282 bool is_artificial = false; 3283 // one of None, Auto, Register, Extern, Static, PrivateExtern 3284 3285 clang::StorageClass storage = clang::SC_None; 3286 uint32_t i; 3287 for (i=0; i<num_attributes; ++i) 3288 { 3289 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3290 DWARFFormValue form_value; 3291 if (attributes.ExtractFormValueAtIndex(i, form_value)) 3292 { 3293 switch (attr) 3294 { 3295 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 3296 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 3297 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 3298 case DW_AT_name: name = form_value.AsCString(); 3299 break; 3300 case DW_AT_type: param_type_die_form = form_value; break; 3301 case DW_AT_artificial: is_artificial = form_value.Boolean(); break; 3302 case DW_AT_location: 3303 // if (form_value.BlockData()) 3304 // { 3305 // const DWARFDataExtractor& debug_info_data = debug_info(); 3306 // uint32_t block_length = form_value.Unsigned(); 3307 // DWARFDataExtractor location(debug_info_data, form_value.BlockData() - debug_info_data.GetDataStart(), block_length); 3308 // } 3309 // else 3310 // { 3311 // } 3312 // break; 3313 case DW_AT_const_value: 3314 case DW_AT_default_value: 3315 case DW_AT_description: 3316 case DW_AT_endianity: 3317 case DW_AT_is_optional: 3318 case DW_AT_segment: 3319 case DW_AT_variable_parameter: 3320 default: 3321 case DW_AT_abstract_origin: 3322 case DW_AT_sibling: 3323 break; 3324 } 3325 } 3326 } 3327 3328 bool skip = false; 3329 if (skip_artificial) 3330 { 3331 if (is_artificial) 3332 { 3333 // In order to determine if a C++ member function is 3334 // "const" we have to look at the const-ness of "this"... 3335 // Ugly, but that 3336 if (arg_idx == 0) 3337 { 3338 if (DeclKindIsCXXClass(containing_decl_ctx->getDeclKind())) 3339 { 3340 // Often times compilers omit the "this" name for the 3341 // specification DIEs, so we can't rely upon the name 3342 // being in the formal parameter DIE... 3343 if (name == NULL || ::strcmp(name, "this")==0) 3344 { 3345 Type *this_type = die.ResolveTypeUID (DIERef(param_type_die_form)); 3346 if (this_type) 3347 { 3348 uint32_t encoding_mask = this_type->GetEncodingMask(); 3349 if (encoding_mask & Type::eEncodingIsPointerUID) 3350 { 3351 is_static = false; 3352 3353 if (encoding_mask & (1u << Type::eEncodingIsConstUID)) 3354 type_quals |= clang::Qualifiers::Const; 3355 if (encoding_mask & (1u << Type::eEncodingIsVolatileUID)) 3356 type_quals |= clang::Qualifiers::Volatile; 3357 } 3358 } 3359 } 3360 } 3361 } 3362 skip = true; 3363 } 3364 else 3365 { 3366 3367 // HACK: Objective C formal parameters "self" and "_cmd" 3368 // are not marked as artificial in the DWARF... 3369 CompileUnit *comp_unit = die.GetLLDBCompileUnit(); 3370 if (comp_unit) 3371 { 3372 switch (comp_unit->GetLanguage()) 3373 { 3374 case eLanguageTypeObjC: 3375 case eLanguageTypeObjC_plus_plus: 3376 if (name && name[0] && (strcmp (name, "self") == 0 || strcmp (name, "_cmd") == 0)) 3377 skip = true; 3378 break; 3379 default: 3380 break; 3381 } 3382 } 3383 } 3384 } 3385 3386 if (!skip) 3387 { 3388 Type *type = die.ResolveTypeUID(DIERef(param_type_die_form)); 3389 if (type) 3390 { 3391 function_param_types.push_back (type->GetForwardCompilerType ()); 3392 3393 clang::ParmVarDecl *param_var_decl = m_ast.CreateParameterDeclaration (name, 3394 type->GetForwardCompilerType (), 3395 storage); 3396 assert(param_var_decl); 3397 function_param_decls.push_back(param_var_decl); 3398 3399 m_ast.SetMetadataAsUserID (param_var_decl, die.GetID()); 3400 } 3401 } 3402 } 3403 arg_idx++; 3404 } 3405 break; 3406 3407 case DW_TAG_unspecified_parameters: 3408 is_variadic = true; 3409 break; 3410 3411 case DW_TAG_template_type_parameter: 3412 case DW_TAG_template_value_parameter: 3413 // The one caller of this was never using the template_param_infos, 3414 // and the local variable was taking up a large amount of stack space 3415 // in SymbolFileDWARF::ParseType() so this was removed. If we ever need 3416 // the template params back, we can add them back. 3417 // ParseTemplateDIE (dwarf_cu, die, template_param_infos); 3418 has_template_params = true; 3419 break; 3420 3421 default: 3422 break; 3423 } 3424 } 3425 return arg_idx; 3426 } 3427 3428 void 3429 DWARFASTParserClang::ParseChildArrayInfo (const SymbolContext& sc, 3430 const DWARFDIE &parent_die, 3431 int64_t& first_index, 3432 std::vector<uint64_t>& element_orders, 3433 uint32_t& byte_stride, 3434 uint32_t& bit_stride) 3435 { 3436 if (!parent_die) 3437 return; 3438 3439 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); die = die.GetSibling()) 3440 { 3441 const dw_tag_t tag = die.Tag(); 3442 switch (tag) 3443 { 3444 case DW_TAG_subrange_type: 3445 { 3446 DWARFAttributes attributes; 3447 const size_t num_child_attributes = die.GetAttributes(attributes); 3448 if (num_child_attributes > 0) 3449 { 3450 uint64_t num_elements = 0; 3451 uint64_t lower_bound = 0; 3452 uint64_t upper_bound = 0; 3453 bool upper_bound_valid = false; 3454 uint32_t i; 3455 for (i=0; i<num_child_attributes; ++i) 3456 { 3457 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3458 DWARFFormValue form_value; 3459 if (attributes.ExtractFormValueAtIndex(i, form_value)) 3460 { 3461 switch (attr) 3462 { 3463 case DW_AT_name: 3464 break; 3465 3466 case DW_AT_count: 3467 num_elements = form_value.Unsigned(); 3468 break; 3469 3470 case DW_AT_bit_stride: 3471 bit_stride = form_value.Unsigned(); 3472 break; 3473 3474 case DW_AT_byte_stride: 3475 byte_stride = form_value.Unsigned(); 3476 break; 3477 3478 case DW_AT_lower_bound: 3479 lower_bound = form_value.Unsigned(); 3480 break; 3481 3482 case DW_AT_upper_bound: 3483 upper_bound_valid = true; 3484 upper_bound = form_value.Unsigned(); 3485 break; 3486 3487 default: 3488 case DW_AT_abstract_origin: 3489 case DW_AT_accessibility: 3490 case DW_AT_allocated: 3491 case DW_AT_associated: 3492 case DW_AT_data_location: 3493 case DW_AT_declaration: 3494 case DW_AT_description: 3495 case DW_AT_sibling: 3496 case DW_AT_threads_scaled: 3497 case DW_AT_type: 3498 case DW_AT_visibility: 3499 break; 3500 } 3501 } 3502 } 3503 3504 if (num_elements == 0) 3505 { 3506 if (upper_bound_valid && upper_bound >= lower_bound) 3507 num_elements = upper_bound - lower_bound + 1; 3508 } 3509 3510 element_orders.push_back (num_elements); 3511 } 3512 } 3513 break; 3514 } 3515 } 3516 } 3517 3518 Type * 3519 DWARFASTParserClang::GetTypeForDIE (const DWARFDIE &die) 3520 { 3521 if (die) 3522 { 3523 SymbolFileDWARF *dwarf = die.GetDWARF(); 3524 DWARFAttributes attributes; 3525 const size_t num_attributes = die.GetAttributes(attributes); 3526 if (num_attributes > 0) 3527 { 3528 DWARFFormValue type_die_form; 3529 for (size_t i = 0; i < num_attributes; ++i) 3530 { 3531 dw_attr_t attr = attributes.AttributeAtIndex(i); 3532 DWARFFormValue form_value; 3533 3534 if (attr == DW_AT_type && attributes.ExtractFormValueAtIndex(i, form_value)) 3535 return dwarf->ResolveTypeUID(dwarf->GetDIE (DIERef(form_value)), true); 3536 } 3537 } 3538 } 3539 3540 return nullptr; 3541 } 3542 3543 clang::Decl * 3544 DWARFASTParserClang::GetClangDeclForDIE (const DWARFDIE &die) 3545 { 3546 if (!die) 3547 return nullptr; 3548 3549 switch (die.Tag()) 3550 { 3551 case DW_TAG_variable: 3552 case DW_TAG_constant: 3553 case DW_TAG_formal_parameter: 3554 case DW_TAG_imported_declaration: 3555 case DW_TAG_imported_module: 3556 break; 3557 default: 3558 return nullptr; 3559 } 3560 3561 DIEToDeclMap::iterator cache_pos = m_die_to_decl.find(die.GetDIE()); 3562 if (cache_pos != m_die_to_decl.end()) 3563 return cache_pos->second; 3564 3565 if (DWARFDIE spec_die = die.GetReferencedDIE(DW_AT_specification)) 3566 { 3567 clang::Decl *decl = GetClangDeclForDIE(spec_die); 3568 m_die_to_decl[die.GetDIE()] = decl; 3569 m_decl_to_die[decl].insert(die.GetDIE()); 3570 return decl; 3571 } 3572 3573 clang::Decl *decl = nullptr; 3574 switch (die.Tag()) 3575 { 3576 case DW_TAG_variable: 3577 case DW_TAG_constant: 3578 case DW_TAG_formal_parameter: 3579 { 3580 SymbolFileDWARF *dwarf = die.GetDWARF(); 3581 Type *type = GetTypeForDIE(die); 3582 const char *name = die.GetName(); 3583 clang::DeclContext *decl_context = ClangASTContext::DeclContextGetAsDeclContext(dwarf->GetDeclContextContainingUID(die.GetID())); 3584 decl = m_ast.CreateVariableDeclaration(decl_context, name, 3585 ClangUtil::GetQualType(type->GetForwardCompilerType())); 3586 break; 3587 } 3588 case DW_TAG_imported_declaration: 3589 { 3590 SymbolFileDWARF *dwarf = die.GetDWARF(); 3591 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3592 if (imported_uid) 3593 { 3594 CompilerDecl imported_decl = imported_uid.GetDecl(); 3595 if (imported_decl) 3596 { 3597 clang::DeclContext *decl_context = ClangASTContext::DeclContextGetAsDeclContext(dwarf->GetDeclContextContainingUID(die.GetID())); 3598 if (clang::NamedDecl *clang_imported_decl = llvm::dyn_cast<clang::NamedDecl>((clang::Decl *)imported_decl.GetOpaqueDecl())) 3599 decl = m_ast.CreateUsingDeclaration(decl_context, clang_imported_decl); 3600 } 3601 } 3602 break; 3603 } 3604 case DW_TAG_imported_module: 3605 { 3606 SymbolFileDWARF *dwarf = die.GetDWARF(); 3607 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3608 3609 if (imported_uid) 3610 { 3611 CompilerDeclContext imported_decl_ctx = imported_uid.GetDeclContext(); 3612 if (imported_decl_ctx) 3613 { 3614 clang::DeclContext *decl_context = ClangASTContext::DeclContextGetAsDeclContext(dwarf->GetDeclContextContainingUID(die.GetID())); 3615 if (clang::NamespaceDecl *ns_decl = ClangASTContext::DeclContextGetAsNamespaceDecl(imported_decl_ctx)) 3616 decl = m_ast.CreateUsingDirectiveDeclaration(decl_context, ns_decl); 3617 } 3618 } 3619 break; 3620 } 3621 default: 3622 break; 3623 } 3624 3625 m_die_to_decl[die.GetDIE()] = decl; 3626 m_decl_to_die[decl].insert(die.GetDIE()); 3627 3628 return decl; 3629 } 3630 3631 clang::DeclContext * 3632 DWARFASTParserClang::GetClangDeclContextForDIE (const DWARFDIE &die) 3633 { 3634 if (die) 3635 { 3636 clang::DeclContext *decl_ctx = GetCachedClangDeclContextForDIE (die); 3637 if (decl_ctx) 3638 return decl_ctx; 3639 3640 bool try_parsing_type = true; 3641 switch (die.Tag()) 3642 { 3643 case DW_TAG_compile_unit: 3644 decl_ctx = m_ast.GetTranslationUnitDecl(); 3645 try_parsing_type = false; 3646 break; 3647 3648 case DW_TAG_namespace: 3649 decl_ctx = ResolveNamespaceDIE (die); 3650 try_parsing_type = false; 3651 break; 3652 3653 case DW_TAG_lexical_block: 3654 decl_ctx = (clang::DeclContext *)ResolveBlockDIE(die); 3655 try_parsing_type = false; 3656 break; 3657 3658 default: 3659 break; 3660 } 3661 3662 if (decl_ctx == nullptr && try_parsing_type) 3663 { 3664 Type* type = die.GetDWARF()->ResolveType (die); 3665 if (type) 3666 decl_ctx = GetCachedClangDeclContextForDIE (die); 3667 } 3668 3669 if (decl_ctx) 3670 { 3671 LinkDeclContextToDIE (decl_ctx, die); 3672 return decl_ctx; 3673 } 3674 } 3675 return nullptr; 3676 } 3677 3678 clang::BlockDecl * 3679 DWARFASTParserClang::ResolveBlockDIE (const DWARFDIE &die) 3680 { 3681 if (die && die.Tag() == DW_TAG_lexical_block) 3682 { 3683 clang::BlockDecl *decl = llvm::cast_or_null<clang::BlockDecl>(m_die_to_decl_ctx[die.GetDIE()]); 3684 3685 if (!decl) 3686 { 3687 DWARFDIE decl_context_die; 3688 clang::DeclContext *decl_context = GetClangDeclContextContainingDIE(die, &decl_context_die); 3689 decl = m_ast.CreateBlockDeclaration(decl_context); 3690 3691 if (decl) 3692 LinkDeclContextToDIE((clang::DeclContext *)decl, die); 3693 } 3694 3695 return decl; 3696 } 3697 return nullptr; 3698 } 3699 3700 clang::NamespaceDecl * 3701 DWARFASTParserClang::ResolveNamespaceDIE (const DWARFDIE &die) 3702 { 3703 if (die && die.Tag() == DW_TAG_namespace) 3704 { 3705 // See if we already parsed this namespace DIE and associated it with a 3706 // uniqued namespace declaration 3707 clang::NamespaceDecl *namespace_decl = static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die.GetDIE()]); 3708 if (namespace_decl) 3709 return namespace_decl; 3710 else 3711 { 3712 const char *namespace_name = die.GetName(); 3713 clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (die, nullptr); 3714 namespace_decl = m_ast.GetUniqueNamespaceDeclaration (namespace_name, containing_decl_ctx); 3715 Log *log = nullptr;// (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 3716 if (log) 3717 { 3718 SymbolFileDWARF *dwarf = die.GetDWARF(); 3719 if (namespace_name) 3720 { 3721 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 3722 "ASTContext => %p: 0x%8.8" PRIx64 ": DW_TAG_namespace with DW_AT_name(\"%s\") => clang::NamespaceDecl *%p (original = %p)", 3723 static_cast<void*>(m_ast.getASTContext()), 3724 die.GetID(), 3725 namespace_name, 3726 static_cast<void*>(namespace_decl), 3727 static_cast<void*>(namespace_decl->getOriginalNamespace())); 3728 } 3729 else 3730 { 3731 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 3732 "ASTContext => %p: 0x%8.8" PRIx64 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p (original = %p)", 3733 static_cast<void*>(m_ast.getASTContext()), 3734 die.GetID(), 3735 static_cast<void*>(namespace_decl), 3736 static_cast<void*>(namespace_decl->getOriginalNamespace())); 3737 } 3738 } 3739 3740 if (namespace_decl) 3741 LinkDeclContextToDIE((clang::DeclContext*)namespace_decl, die); 3742 return namespace_decl; 3743 } 3744 } 3745 return nullptr; 3746 } 3747 3748 clang::DeclContext * 3749 DWARFASTParserClang::GetClangDeclContextContainingDIE (const DWARFDIE &die, 3750 DWARFDIE *decl_ctx_die_copy) 3751 { 3752 SymbolFileDWARF *dwarf = die.GetDWARF(); 3753 3754 DWARFDIE decl_ctx_die = dwarf->GetDeclContextDIEContainingDIE (die); 3755 3756 if (decl_ctx_die_copy) 3757 *decl_ctx_die_copy = decl_ctx_die; 3758 3759 if (decl_ctx_die) 3760 { 3761 clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE (decl_ctx_die); 3762 if (clang_decl_ctx) 3763 return clang_decl_ctx; 3764 } 3765 return m_ast.GetTranslationUnitDecl(); 3766 } 3767 3768 clang::DeclContext * 3769 DWARFASTParserClang::GetCachedClangDeclContextForDIE (const DWARFDIE &die) 3770 { 3771 if (die) 3772 { 3773 DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find(die.GetDIE()); 3774 if (pos != m_die_to_decl_ctx.end()) 3775 return pos->second; 3776 } 3777 return nullptr; 3778 } 3779 3780 void 3781 DWARFASTParserClang::LinkDeclContextToDIE (clang::DeclContext *decl_ctx, const DWARFDIE &die) 3782 { 3783 m_die_to_decl_ctx[die.GetDIE()] = decl_ctx; 3784 // There can be many DIEs for a single decl context 3785 //m_decl_ctx_to_die[decl_ctx].insert(die.GetDIE()); 3786 m_decl_ctx_to_die.insert(std::make_pair(decl_ctx, die)); 3787 } 3788 3789 bool 3790 DWARFASTParserClang::CopyUniqueClassMethodTypes (const DWARFDIE &src_class_die, 3791 const DWARFDIE &dst_class_die, 3792 lldb_private::Type *class_type, 3793 DWARFDIECollection &failures) 3794 { 3795 if (!class_type || !src_class_die || !dst_class_die) 3796 return false; 3797 if (src_class_die.Tag() != dst_class_die.Tag()) 3798 return false; 3799 3800 // We need to complete the class type so we can get all of the method types 3801 // parsed so we can then unique those types to their equivalent counterparts 3802 // in "dst_cu" and "dst_class_die" 3803 class_type->GetFullCompilerType (); 3804 3805 DWARFDIE src_die; 3806 DWARFDIE dst_die; 3807 UniqueCStringMap<DWARFDIE> src_name_to_die; 3808 UniqueCStringMap<DWARFDIE> dst_name_to_die; 3809 UniqueCStringMap<DWARFDIE> src_name_to_die_artificial; 3810 UniqueCStringMap<DWARFDIE> dst_name_to_die_artificial; 3811 for (src_die = src_class_die.GetFirstChild(); src_die.IsValid(); src_die = src_die.GetSibling()) 3812 { 3813 if (src_die.Tag() == DW_TAG_subprogram) 3814 { 3815 // Make sure this is a declaration and not a concrete instance by looking 3816 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3817 // are placed inside the class definitions and shouldn't be included in 3818 // the list of things are are tracking here. 3819 if (src_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) 3820 { 3821 const char *src_name = src_die.GetMangledName (); 3822 if (src_name) 3823 { 3824 ConstString src_const_name(src_name); 3825 if (src_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3826 src_name_to_die_artificial.Append(src_const_name.GetCString(), src_die); 3827 else 3828 src_name_to_die.Append(src_const_name.GetCString(), src_die); 3829 } 3830 } 3831 } 3832 } 3833 for (dst_die = dst_class_die.GetFirstChild(); dst_die.IsValid(); dst_die = dst_die.GetSibling()) 3834 { 3835 if (dst_die.Tag() == DW_TAG_subprogram) 3836 { 3837 // Make sure this is a declaration and not a concrete instance by looking 3838 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3839 // are placed inside the class definitions and shouldn't be included in 3840 // the list of things are are tracking here. 3841 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) 3842 { 3843 const char *dst_name = dst_die.GetMangledName (); 3844 if (dst_name) 3845 { 3846 ConstString dst_const_name(dst_name); 3847 if ( dst_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3848 dst_name_to_die_artificial.Append(dst_const_name.GetCString(), dst_die); 3849 else 3850 dst_name_to_die.Append(dst_const_name.GetCString(), dst_die); 3851 } 3852 } 3853 } 3854 } 3855 const uint32_t src_size = src_name_to_die.GetSize (); 3856 const uint32_t dst_size = dst_name_to_die.GetSize (); 3857 Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | DWARF_LOG_TYPE_COMPLETION)); 3858 3859 // Is everything kosher so we can go through the members at top speed? 3860 bool fast_path = true; 3861 3862 if (src_size != dst_size) 3863 { 3864 if (src_size != 0 && dst_size != 0) 3865 { 3866 if (log) 3867 log->Printf("warning: trying to unique class DIE 0x%8.8x to 0x%8.8x, but they didn't have the same size (src=%d, dst=%d)", 3868 src_class_die.GetOffset(), 3869 dst_class_die.GetOffset(), 3870 src_size, 3871 dst_size); 3872 } 3873 3874 fast_path = false; 3875 } 3876 3877 uint32_t idx; 3878 3879 if (fast_path) 3880 { 3881 for (idx = 0; idx < src_size; ++idx) 3882 { 3883 src_die = src_name_to_die.GetValueAtIndexUnchecked (idx); 3884 dst_die = dst_name_to_die.GetValueAtIndexUnchecked (idx); 3885 3886 if (src_die.Tag() != dst_die.Tag()) 3887 { 3888 if (log) 3889 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, but 0x%8.8x (%s) tags didn't match 0x%8.8x (%s)", 3890 src_class_die.GetOffset(), 3891 dst_class_die.GetOffset(), 3892 src_die.GetOffset(), 3893 src_die.GetTagAsCString(), 3894 dst_die.GetOffset(), 3895 dst_die.GetTagAsCString()); 3896 fast_path = false; 3897 } 3898 3899 const char *src_name = src_die.GetMangledName (); 3900 const char *dst_name = dst_die.GetMangledName (); 3901 3902 // Make sure the names match 3903 if (src_name == dst_name || (strcmp (src_name, dst_name) == 0)) 3904 continue; 3905 3906 if (log) 3907 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, but 0x%8.8x (%s) names didn't match 0x%8.8x (%s)", 3908 src_class_die.GetOffset(), 3909 dst_class_die.GetOffset(), 3910 src_die.GetOffset(), 3911 src_name, 3912 dst_die.GetOffset(), 3913 dst_name); 3914 3915 fast_path = false; 3916 } 3917 } 3918 3919 DWARFASTParserClang *src_dwarf_ast_parser = (DWARFASTParserClang *)src_die.GetDWARFParser(); 3920 DWARFASTParserClang *dst_dwarf_ast_parser = (DWARFASTParserClang *)dst_die.GetDWARFParser(); 3921 3922 // Now do the work of linking the DeclContexts and Types. 3923 if (fast_path) 3924 { 3925 // We can do this quickly. Just run across the tables index-for-index since 3926 // we know each node has matching names and tags. 3927 for (idx = 0; idx < src_size; ++idx) 3928 { 3929 src_die = src_name_to_die.GetValueAtIndexUnchecked (idx); 3930 dst_die = dst_name_to_die.GetValueAtIndexUnchecked (idx); 3931 3932 clang::DeclContext *src_decl_ctx = src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3933 if (src_decl_ctx) 3934 { 3935 if (log) 3936 log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3937 static_cast<void*>(src_decl_ctx), 3938 src_die.GetOffset(), dst_die.GetOffset()); 3939 dst_dwarf_ast_parser->LinkDeclContextToDIE (src_decl_ctx, dst_die); 3940 } 3941 else 3942 { 3943 if (log) 3944 log->Printf ("warning: tried to unique decl context from 0x%8.8x for 0x%8.8x, but none was found", 3945 src_die.GetOffset(), dst_die.GetOffset()); 3946 } 3947 3948 Type *src_child_type = dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3949 if (src_child_type) 3950 { 3951 if (log) 3952 log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 3953 static_cast<void*>(src_child_type), 3954 src_child_type->GetID(), 3955 src_die.GetOffset(), dst_die.GetOffset()); 3956 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 3957 } 3958 else 3959 { 3960 if (log) 3961 log->Printf ("warning: tried to unique lldb_private::Type from 0x%8.8x for 0x%8.8x, but none was found", src_die.GetOffset(), dst_die.GetOffset()); 3962 } 3963 } 3964 } 3965 else 3966 { 3967 // We must do this slowly. For each member of the destination, look 3968 // up a member in the source with the same name, check its tag, and 3969 // unique them if everything matches up. Report failures. 3970 3971 if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty()) 3972 { 3973 src_name_to_die.Sort(); 3974 3975 for (idx = 0; idx < dst_size; ++idx) 3976 { 3977 const char *dst_name = dst_name_to_die.GetCStringAtIndex(idx); 3978 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3979 src_die = src_name_to_die.Find(dst_name, DWARFDIE()); 3980 3981 if (src_die && (src_die.Tag() == dst_die.Tag())) 3982 { 3983 clang::DeclContext *src_decl_ctx = src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3984 if (src_decl_ctx) 3985 { 3986 if (log) 3987 log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3988 static_cast<void*>(src_decl_ctx), 3989 src_die.GetOffset(), 3990 dst_die.GetOffset()); 3991 dst_dwarf_ast_parser->LinkDeclContextToDIE (src_decl_ctx, dst_die); 3992 } 3993 else 3994 { 3995 if (log) 3996 log->Printf ("warning: tried to unique decl context from 0x%8.8x for 0x%8.8x, but none was found", src_die.GetOffset(), dst_die.GetOffset()); 3997 } 3998 3999 Type *src_child_type = dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4000 if (src_child_type) 4001 { 4002 if (log) 4003 log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 4004 static_cast<void*>(src_child_type), 4005 src_child_type->GetID(), 4006 src_die.GetOffset(), 4007 dst_die.GetOffset()); 4008 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 4009 } 4010 else 4011 { 4012 if (log) 4013 log->Printf ("warning: tried to unique lldb_private::Type from 0x%8.8x for 0x%8.8x, but none was found", src_die.GetOffset(), dst_die.GetOffset()); 4014 } 4015 } 4016 else 4017 { 4018 if (log) 4019 log->Printf ("warning: couldn't find a match for 0x%8.8x", dst_die.GetOffset()); 4020 4021 failures.Append(dst_die); 4022 } 4023 } 4024 } 4025 } 4026 4027 const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize (); 4028 const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize (); 4029 4030 if (src_size_artificial && dst_size_artificial) 4031 { 4032 dst_name_to_die_artificial.Sort(); 4033 4034 for (idx = 0; idx < src_size_artificial; ++idx) 4035 { 4036 const char *src_name_artificial = src_name_to_die_artificial.GetCStringAtIndex(idx); 4037 src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked (idx); 4038 dst_die = dst_name_to_die_artificial.Find(src_name_artificial, DWARFDIE()); 4039 4040 if (dst_die) 4041 { 4042 // Both classes have the artificial types, link them 4043 clang::DeclContext *src_decl_ctx = src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4044 if (src_decl_ctx) 4045 { 4046 if (log) 4047 log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4048 static_cast<void*>(src_decl_ctx), 4049 src_die.GetOffset(), dst_die.GetOffset()); 4050 dst_dwarf_ast_parser->LinkDeclContextToDIE (src_decl_ctx, dst_die); 4051 } 4052 else 4053 { 4054 if (log) 4055 log->Printf ("warning: tried to unique decl context from 0x%8.8x for 0x%8.8x, but none was found", src_die.GetOffset(), dst_die.GetOffset()); 4056 } 4057 4058 Type *src_child_type = dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4059 if (src_child_type) 4060 { 4061 if (log) 4062 log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 4063 static_cast<void*>(src_child_type), 4064 src_child_type->GetID(), 4065 src_die.GetOffset(), dst_die.GetOffset()); 4066 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 4067 } 4068 else 4069 { 4070 if (log) 4071 log->Printf ("warning: tried to unique lldb_private::Type from 0x%8.8x for 0x%8.8x, but none was found", src_die.GetOffset(), dst_die.GetOffset()); 4072 } 4073 } 4074 } 4075 } 4076 4077 if (dst_size_artificial) 4078 { 4079 for (idx = 0; idx < dst_size_artificial; ++idx) 4080 { 4081 const char *dst_name_artificial = dst_name_to_die_artificial.GetCStringAtIndex(idx); 4082 dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked (idx); 4083 if (log) 4084 log->Printf ("warning: need to create artificial method for 0x%8.8x for method '%s'", dst_die.GetOffset(), dst_name_artificial); 4085 4086 failures.Append(dst_die); 4087 } 4088 } 4089 4090 return (failures.Size() != 0); 4091 } 4092 4093