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 "lldb/Interpreter/Args.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/Symbol/ClangASTImporter.h" 28 #include "lldb/Symbol/ClangExternalASTSourceCommon.h" 29 #include "lldb/Symbol/CompileUnit.h" 30 #include "lldb/Symbol/Function.h" 31 #include "lldb/Symbol/ObjectFile.h" 32 #include "lldb/Symbol/SymbolVendor.h" 33 #include "lldb/Symbol/TypeList.h" 34 #include "lldb/Symbol/TypeMap.h" 35 #include "lldb/Target/Language.h" 36 #include "Plugins/Language/ObjC/ObjCLanguage.h" 37 38 #include "clang/AST/DeclCXX.h" 39 #include "clang/AST/DeclObjC.h" 40 41 #include <map> 42 #include <vector> 43 44 //#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN 45 46 #ifdef ENABLE_DEBUG_PRINTF 47 #include <stdio.h> 48 #define DEBUG_PRINTF(fmt, ...) printf(fmt, __VA_ARGS__) 49 #else 50 #define DEBUG_PRINTF(fmt, ...) 51 #endif 52 53 54 using namespace lldb; 55 using namespace lldb_private; 56 DWARFASTParserClang::DWARFASTParserClang (ClangASTContext &ast) : 57 m_ast (ast), 58 m_die_to_decl_ctx (), 59 m_decl_ctx_to_die () 60 { 61 } 62 63 DWARFASTParserClang::~DWARFASTParserClang () 64 { 65 } 66 67 68 static AccessType 69 DW_ACCESS_to_AccessType (uint32_t dwarf_accessibility) 70 { 71 switch (dwarf_accessibility) 72 { 73 case DW_ACCESS_public: return eAccessPublic; 74 case DW_ACCESS_private: return eAccessPrivate; 75 case DW_ACCESS_protected: return eAccessProtected; 76 default: break; 77 } 78 return eAccessNone; 79 } 80 81 static bool 82 DeclKindIsCXXClass (clang::Decl::Kind decl_kind) 83 { 84 switch (decl_kind) 85 { 86 case clang::Decl::CXXRecord: 87 case clang::Decl::ClassTemplateSpecialization: 88 return true; 89 default: 90 break; 91 } 92 return false; 93 } 94 95 struct BitfieldInfo 96 { 97 uint64_t bit_size; 98 uint64_t bit_offset; 99 100 BitfieldInfo () : 101 bit_size (LLDB_INVALID_ADDRESS), 102 bit_offset (LLDB_INVALID_ADDRESS) 103 { 104 } 105 106 void 107 Clear() 108 { 109 bit_size = LLDB_INVALID_ADDRESS; 110 bit_offset = LLDB_INVALID_ADDRESS; 111 } 112 113 bool IsValid () 114 { 115 return (bit_size != LLDB_INVALID_ADDRESS) && 116 (bit_offset != LLDB_INVALID_ADDRESS); 117 } 118 }; 119 120 121 ClangASTImporter & 122 DWARFASTParserClang::GetClangASTImporter() 123 { 124 if (!m_clang_ast_importer_ap) 125 { 126 m_clang_ast_importer_ap.reset (new ClangASTImporter); 127 } 128 return *m_clang_ast_importer_ap; 129 } 130 131 132 TypeSP 133 DWARFASTParserClang::ParseTypeFromDWO (const DWARFDIE &die, Log *log) 134 { 135 ModuleSP dwo_module_sp = die.GetContainingDWOModule(); 136 if (dwo_module_sp) 137 { 138 // This type comes from an external DWO module 139 std::vector<CompilerContext> dwo_context; 140 die.GetDWOContext(dwo_context); 141 TypeMap dwo_types; 142 if (dwo_module_sp->GetSymbolVendor()->FindTypes(dwo_context, true, dwo_types)) 143 { 144 const size_t num_dwo_types = dwo_types.GetSize(); 145 if (num_dwo_types == 1) 146 { 147 // We found a real definition for this type elsewhere 148 // so lets use it and cache the fact that we found 149 // a complete type for this die 150 TypeSP dwo_type_sp = dwo_types.GetTypeAtIndex(0); 151 if (dwo_type_sp) 152 { 153 lldb_private::CompilerType dwo_type = dwo_type_sp->GetForwardCompilerType(); 154 155 lldb_private::CompilerType type = GetClangASTImporter().CopyType (m_ast, dwo_type); 156 157 //printf ("copied_qual_type: ast = %p, clang_type = %p, name = '%s'\n", m_ast, copied_qual_type.getAsOpaquePtr(), external_type->GetName().GetCString()); 158 if (type) 159 { 160 SymbolFileDWARF *dwarf = die.GetDWARF(); 161 TypeSP type_sp (new Type (die.GetID(), 162 dwarf, 163 dwo_type_sp->GetName(), 164 dwo_type_sp->GetByteSize(), 165 NULL, 166 LLDB_INVALID_UID, 167 Type::eEncodingInvalid, 168 &dwo_type_sp->GetDeclaration(), 169 type, 170 Type::eResolveStateForward)); 171 172 dwarf->GetTypeList()->Insert(type_sp); 173 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 174 clang::TagDecl *tag_decl = ClangASTContext::GetAsTagDecl(type); 175 if (tag_decl) 176 LinkDeclContextToDIE(tag_decl, die); 177 else 178 { 179 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE(die); 180 if (defn_decl_ctx) 181 LinkDeclContextToDIE(defn_decl_ctx, die); 182 } 183 return type_sp; 184 } 185 } 186 } 187 } 188 } 189 return TypeSP(); 190 } 191 192 TypeSP 193 DWARFASTParserClang::ParseTypeFromDWARF (const SymbolContext& sc, 194 const DWARFDIE &die, 195 Log *log, 196 bool *type_is_new_ptr) 197 { 198 TypeSP type_sp; 199 200 if (type_is_new_ptr) 201 *type_is_new_ptr = false; 202 203 AccessType accessibility = eAccessNone; 204 if (die) 205 { 206 SymbolFileDWARF *dwarf = die.GetDWARF(); 207 if (log) 208 { 209 DWARFDIE context_die; 210 clang::DeclContext *context = GetClangDeclContextContainingDIE (die, &context_die); 211 212 dwarf->GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x, decl_ctx = %p (die 0x%8.8x)) %s name = '%s')", 213 die.GetOffset(), 214 static_cast<void*>(context), 215 context_die.GetOffset(), 216 die.GetTagAsCString(), 217 die.GetName()); 218 219 } 220 // 221 // Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 222 // if (log && dwarf_cu) 223 // { 224 // StreamString s; 225 // die->DumpLocation (this, dwarf_cu, s); 226 // dwarf->GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDwarf::%s %s", __FUNCTION__, s.GetData()); 227 // 228 // } 229 230 Type *type_ptr = dwarf->GetDIEToType().lookup (die.GetDIE()); 231 TypeList* type_list = dwarf->GetTypeList(); 232 if (type_ptr == NULL) 233 { 234 if (type_is_new_ptr) 235 *type_is_new_ptr = true; 236 237 const dw_tag_t tag = die.Tag(); 238 239 bool is_forward_declaration = false; 240 DWARFAttributes attributes; 241 const char *type_name_cstr = NULL; 242 ConstString type_name_const_str; 243 Type::ResolveState resolve_state = Type::eResolveStateUnresolved; 244 uint64_t byte_size = 0; 245 Declaration decl; 246 247 Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID; 248 CompilerType clang_type; 249 DWARFFormValue form_value; 250 251 dw_attr_t attr; 252 253 switch (tag) 254 { 255 case DW_TAG_typedef: 256 // Try to parse a typedef from the DWO file first as modules 257 // can contain typedef'ed structures that have no names like: 258 // 259 // typedef struct { int a; } Foo; 260 // 261 // In this case we will have a structure with no name and a 262 // typedef named "Foo" that points to this unnamed structure. 263 // The name in the typedef is the only identifier for the struct, 264 // so always try to get typedefs from DWO files if possible. 265 // 266 // The type_sp returned will be empty if the typedef doesn't exist 267 // in a DWO file, so it is cheap to call this function just to check. 268 // 269 // If we don't do this we end up creating a TypeSP that says this 270 // is a typedef to type 0x123 (the DW_AT_type value would be 0x123 271 // in the DW_TAG_typedef), and this is the unnamed structure type. 272 // We will have a hard time tracking down an unnammed structure 273 // type in the module DWO file, so we make sure we don't get into 274 // this situation by always resolving typedefs from the DWO file. 275 type_sp = ParseTypeFromDWO(die, log); 276 if (type_sp) 277 return type_sp; 278 279 case DW_TAG_base_type: 280 case DW_TAG_pointer_type: 281 case DW_TAG_reference_type: 282 case DW_TAG_rvalue_reference_type: 283 case DW_TAG_const_type: 284 case DW_TAG_restrict_type: 285 case DW_TAG_volatile_type: 286 case DW_TAG_unspecified_type: 287 { 288 // Set a bit that lets us know that we are currently parsing this 289 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 290 291 const size_t num_attributes = die.GetAttributes (attributes); 292 uint32_t encoding = 0; 293 lldb::user_id_t encoding_uid = LLDB_INVALID_UID; 294 295 if (num_attributes > 0) 296 { 297 uint32_t i; 298 for (i=0; i<num_attributes; ++i) 299 { 300 attr = attributes.AttributeAtIndex(i); 301 if (attributes.ExtractFormValueAtIndex(i, form_value)) 302 { 303 switch (attr) 304 { 305 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 306 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 307 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 308 case DW_AT_name: 309 310 type_name_cstr = form_value.AsCString(); 311 // Work around a bug in llvm-gcc where they give a name to a reference type which doesn't 312 // include the "&"... 313 if (tag == DW_TAG_reference_type) 314 { 315 if (strchr (type_name_cstr, '&') == NULL) 316 type_name_cstr = NULL; 317 } 318 if (type_name_cstr) 319 type_name_const_str.SetCString(type_name_cstr); 320 break; 321 case DW_AT_byte_size: byte_size = form_value.Unsigned(); break; 322 case DW_AT_encoding: encoding = form_value.Unsigned(); break; 323 case DW_AT_type: encoding_uid = DIERef(form_value).GetUID(); break; 324 default: 325 case DW_AT_sibling: 326 break; 327 } 328 } 329 } 330 } 331 332 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); 333 334 switch (tag) 335 { 336 default: 337 break; 338 339 case DW_TAG_unspecified_type: 340 if (strcmp(type_name_cstr, "nullptr_t") == 0 || 341 strcmp(type_name_cstr, "decltype(nullptr)") == 0 ) 342 { 343 resolve_state = Type::eResolveStateFull; 344 clang_type = m_ast.GetBasicType(eBasicTypeNullPtr); 345 break; 346 } 347 // Fall through to base type below in case we can handle the type there... 348 349 case DW_TAG_base_type: 350 resolve_state = Type::eResolveStateFull; 351 clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize (type_name_cstr, 352 encoding, 353 byte_size * 8); 354 break; 355 356 case DW_TAG_pointer_type: encoding_data_type = Type::eEncodingIsPointerUID; break; 357 case DW_TAG_reference_type: encoding_data_type = Type::eEncodingIsLValueReferenceUID; break; 358 case DW_TAG_rvalue_reference_type: encoding_data_type = Type::eEncodingIsRValueReferenceUID; break; 359 case DW_TAG_typedef: encoding_data_type = Type::eEncodingIsTypedefUID; break; 360 case DW_TAG_const_type: encoding_data_type = Type::eEncodingIsConstUID; break; 361 case DW_TAG_restrict_type: encoding_data_type = Type::eEncodingIsRestrictUID; break; 362 case DW_TAG_volatile_type: encoding_data_type = Type::eEncodingIsVolatileUID; break; 363 } 364 365 if (!clang_type && (encoding_data_type == Type::eEncodingIsPointerUID || encoding_data_type == Type::eEncodingIsTypedefUID) && sc.comp_unit != NULL) 366 { 367 bool translation_unit_is_objc = (sc.comp_unit->GetLanguage() == eLanguageTypeObjC || sc.comp_unit->GetLanguage() == eLanguageTypeObjC_plus_plus); 368 369 if (translation_unit_is_objc) 370 { 371 if (type_name_cstr != NULL) 372 { 373 static ConstString g_objc_type_name_id("id"); 374 static ConstString g_objc_type_name_Class("Class"); 375 static ConstString g_objc_type_name_selector("SEL"); 376 377 if (type_name_const_str == g_objc_type_name_id) 378 { 379 if (log) 380 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 381 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'id' built-in type.", 382 die.GetOffset(), 383 die.GetTagAsCString(), 384 die.GetName()); 385 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 386 encoding_data_type = Type::eEncodingIsUID; 387 encoding_uid = LLDB_INVALID_UID; 388 resolve_state = Type::eResolveStateFull; 389 390 } 391 else if (type_name_const_str == g_objc_type_name_Class) 392 { 393 if (log) 394 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 395 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'Class' built-in type.", 396 die.GetOffset(), 397 die.GetTagAsCString(), 398 die.GetName()); 399 clang_type = m_ast.GetBasicType(eBasicTypeObjCClass); 400 encoding_data_type = Type::eEncodingIsUID; 401 encoding_uid = LLDB_INVALID_UID; 402 resolve_state = Type::eResolveStateFull; 403 } 404 else if (type_name_const_str == g_objc_type_name_selector) 405 { 406 if (log) 407 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 408 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'selector' built-in type.", 409 die.GetOffset(), 410 die.GetTagAsCString(), 411 die.GetName()); 412 clang_type = m_ast.GetBasicType(eBasicTypeObjCSel); 413 encoding_data_type = Type::eEncodingIsUID; 414 encoding_uid = LLDB_INVALID_UID; 415 resolve_state = Type::eResolveStateFull; 416 } 417 } 418 else if (encoding_data_type == Type::eEncodingIsPointerUID && encoding_uid != LLDB_INVALID_UID) 419 { 420 // Clang sometimes erroneously emits id as objc_object*. In that case we fix up the type to "id". 421 422 const DWARFDIE encoding_die = die.GetDIE(encoding_uid); 423 424 if (encoding_die && encoding_die.Tag() == DW_TAG_structure_type) 425 { 426 if (const char *struct_name = encoding_die.GetName()) 427 { 428 if (!strcmp(struct_name, "objc_object")) 429 { 430 if (log) 431 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 432 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is 'objc_object*', which we overrode to 'id'.", 433 die.GetOffset(), 434 die.GetTagAsCString(), 435 die.GetName()); 436 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 437 encoding_data_type = Type::eEncodingIsUID; 438 encoding_uid = LLDB_INVALID_UID; 439 resolve_state = Type::eResolveStateFull; 440 } 441 } 442 } 443 } 444 } 445 } 446 447 type_sp.reset( new Type (die.GetID(), 448 dwarf, 449 type_name_const_str, 450 byte_size, 451 NULL, 452 encoding_uid, 453 encoding_data_type, 454 &decl, 455 clang_type, 456 resolve_state)); 457 458 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 459 460 // Type* encoding_type = GetUniquedTypeForDIEOffset(encoding_uid, type_sp, NULL, 0, 0, false); 461 // if (encoding_type != NULL) 462 // { 463 // if (encoding_type != DIE_IS_BEING_PARSED) 464 // type_sp->SetEncodingType(encoding_type); 465 // else 466 // m_indirect_fixups.push_back(type_sp.get()); 467 // } 468 } 469 break; 470 471 case DW_TAG_structure_type: 472 case DW_TAG_union_type: 473 case DW_TAG_class_type: 474 { 475 // Set a bit that lets us know that we are currently parsing this 476 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 477 bool byte_size_valid = false; 478 479 LanguageType class_language = eLanguageTypeUnknown; 480 bool is_complete_objc_class = false; 481 //bool struct_is_class = false; 482 const size_t num_attributes = die.GetAttributes (attributes); 483 if (num_attributes > 0) 484 { 485 uint32_t i; 486 for (i=0; i<num_attributes; ++i) 487 { 488 attr = attributes.AttributeAtIndex(i); 489 if (attributes.ExtractFormValueAtIndex(i, form_value)) 490 { 491 switch (attr) 492 { 493 case DW_AT_decl_file: 494 if (die.GetCU()->DW_AT_decl_file_attributes_are_invalid()) 495 { 496 // llvm-gcc outputs invalid DW_AT_decl_file attributes that always 497 // point to the compile unit file, so we clear this invalid value 498 // so that we can still unique types efficiently. 499 decl.SetFile(FileSpec ("<invalid>", false)); 500 } 501 else 502 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); 503 break; 504 505 case DW_AT_decl_line: 506 decl.SetLine(form_value.Unsigned()); 507 break; 508 509 case DW_AT_decl_column: 510 decl.SetColumn(form_value.Unsigned()); 511 break; 512 513 case DW_AT_name: 514 type_name_cstr = form_value.AsCString(); 515 type_name_const_str.SetCString(type_name_cstr); 516 break; 517 518 case DW_AT_byte_size: 519 byte_size = form_value.Unsigned(); 520 byte_size_valid = true; 521 break; 522 523 case DW_AT_accessibility: 524 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 525 break; 526 527 case DW_AT_declaration: 528 is_forward_declaration = form_value.Boolean(); 529 break; 530 531 case DW_AT_APPLE_runtime_class: 532 class_language = (LanguageType)form_value.Signed(); 533 break; 534 535 case DW_AT_APPLE_objc_complete_type: 536 is_complete_objc_class = form_value.Signed(); 537 break; 538 539 case DW_AT_allocated: 540 case DW_AT_associated: 541 case DW_AT_data_location: 542 case DW_AT_description: 543 case DW_AT_start_scope: 544 case DW_AT_visibility: 545 default: 546 case DW_AT_sibling: 547 break; 548 } 549 } 550 } 551 } 552 553 // UniqueDWARFASTType is large, so don't create a local variables on the 554 // stack, put it on the heap. This function is often called recursively 555 // and clang isn't good and sharing the stack space for variables in different blocks. 556 std::unique_ptr<UniqueDWARFASTType> unique_ast_entry_ap(new UniqueDWARFASTType()); 557 558 if (type_name_const_str) 559 { 560 LanguageType die_language = die.GetLanguage(); 561 bool handled = false; 562 if (Language::LanguageIsCPlusPlus(die_language)) 563 { 564 std::string qualified_name; 565 if (die.GetQualifiedName(qualified_name)) 566 { 567 handled = true; 568 ConstString const_qualified_name(qualified_name); 569 if (dwarf->GetUniqueDWARFASTTypeMap().Find(const_qualified_name, die, Declaration(), 570 byte_size_valid ? byte_size : -1, 571 *unique_ast_entry_ap)) 572 { 573 type_sp = unique_ast_entry_ap->m_type_sp; 574 if (type_sp) 575 { 576 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 577 return type_sp; 578 } 579 } 580 } 581 } 582 583 if (!handled) 584 { 585 if (dwarf->GetUniqueDWARFASTTypeMap().Find(type_name_const_str, die, decl, 586 byte_size_valid ? byte_size : -1, 587 *unique_ast_entry_ap)) 588 { 589 type_sp = unique_ast_entry_ap->m_type_sp; 590 if (type_sp) 591 { 592 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 593 return type_sp; 594 } 595 } 596 } 597 } 598 599 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr); 600 601 int tag_decl_kind = -1; 602 AccessType default_accessibility = eAccessNone; 603 if (tag == DW_TAG_structure_type) 604 { 605 tag_decl_kind = clang::TTK_Struct; 606 default_accessibility = eAccessPublic; 607 } 608 else if (tag == DW_TAG_union_type) 609 { 610 tag_decl_kind = clang::TTK_Union; 611 default_accessibility = eAccessPublic; 612 } 613 else if (tag == DW_TAG_class_type) 614 { 615 tag_decl_kind = clang::TTK_Class; 616 default_accessibility = eAccessPrivate; 617 } 618 619 if (byte_size_valid && byte_size == 0 && type_name_cstr && 620 die.HasChildren() == false && 621 sc.comp_unit->GetLanguage() == eLanguageTypeObjC) 622 { 623 // Work around an issue with clang at the moment where 624 // forward declarations for objective C classes are emitted 625 // as: 626 // DW_TAG_structure_type [2] 627 // DW_AT_name( "ForwardObjcClass" ) 628 // DW_AT_byte_size( 0x00 ) 629 // DW_AT_decl_file( "..." ) 630 // DW_AT_decl_line( 1 ) 631 // 632 // Note that there is no DW_AT_declaration and there are 633 // no children, and the byte size is zero. 634 is_forward_declaration = true; 635 } 636 637 if (class_language == eLanguageTypeObjC || 638 class_language == eLanguageTypeObjC_plus_plus) 639 { 640 if (!is_complete_objc_class && die.Supports_DW_AT_APPLE_objc_complete_type()) 641 { 642 // We have a valid eSymbolTypeObjCClass class symbol whose 643 // name matches the current objective C class that we 644 // are trying to find and this DIE isn't the complete 645 // definition (we checked is_complete_objc_class above and 646 // know it is false), so the real definition is in here somewhere 647 type_sp = dwarf->FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true); 648 649 if (!type_sp) 650 { 651 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 652 if (debug_map_symfile) 653 { 654 // We weren't able to find a full declaration in 655 // this DWARF, see if we have a declaration anywhere 656 // else... 657 type_sp = debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true); 658 } 659 } 660 661 if (type_sp) 662 { 663 if (log) 664 { 665 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 666 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is an incomplete objc type, complete type is 0x%8.8" PRIx64, 667 static_cast<void*>(this), 668 die.GetOffset(), 669 DW_TAG_value_to_name(tag), 670 type_name_cstr, 671 type_sp->GetID()); 672 } 673 674 // We found a real definition for this type elsewhere 675 // so lets use it and cache the fact that we found 676 // a complete type for this die 677 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 678 return type_sp; 679 } 680 } 681 } 682 683 684 if (is_forward_declaration) 685 { 686 // We have a forward declaration to a type and we need 687 // to try and find a full declaration. We look in the 688 // current type index just in case we have a forward 689 // declaration followed by an actual declarations in the 690 // DWARF. If this fails, we need to look elsewhere... 691 if (log) 692 { 693 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 694 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, trying to find complete type", 695 static_cast<void*>(this), 696 die.GetOffset(), 697 DW_TAG_value_to_name(tag), 698 type_name_cstr); 699 } 700 701 // See if the type comes from a DWO module and if so, track down that type. 702 type_sp = ParseTypeFromDWO(die, log); 703 if (type_sp) 704 return type_sp; 705 706 DWARFDeclContext die_decl_ctx; 707 die.GetDWARFDeclContext(die_decl_ctx); 708 709 //type_sp = FindDefinitionTypeForDIE (dwarf_cu, die, type_name_const_str); 710 type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx); 711 712 if (!type_sp) 713 { 714 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 715 if (debug_map_symfile) 716 { 717 // We weren't able to find a full declaration in 718 // this DWARF, see if we have a declaration anywhere 719 // else... 720 type_sp = debug_map_symfile->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx); 721 } 722 } 723 724 if (type_sp) 725 { 726 if (log) 727 { 728 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 729 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, complete type is 0x%8.8" PRIx64, 730 static_cast<void*>(this), 731 die.GetOffset(), 732 DW_TAG_value_to_name(tag), 733 type_name_cstr, 734 type_sp->GetID()); 735 } 736 737 // We found a real definition for this type elsewhere 738 // so lets use it and cache the fact that we found 739 // a complete type for this die 740 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 741 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE( 742 dwarf->DebugInfo()->GetDIE(DIERef(type_sp->GetID()))); 743 if (defn_decl_ctx) 744 LinkDeclContextToDIE(defn_decl_ctx, die); 745 return type_sp; 746 } 747 } 748 assert (tag_decl_kind != -1); 749 bool clang_type_was_created = false; 750 clang_type.SetCompilerType(&m_ast, dwarf->GetForwardDeclDieToClangType().lookup (die.GetDIE())); 751 if (!clang_type) 752 { 753 clang::DeclContext *decl_ctx = GetClangDeclContextContainingDIE (die, nullptr); 754 if (accessibility == eAccessNone && decl_ctx) 755 { 756 // Check the decl context that contains this class/struct/union. 757 // If it is a class we must give it an accessibility. 758 const clang::Decl::Kind containing_decl_kind = decl_ctx->getDeclKind(); 759 if (DeclKindIsCXXClass (containing_decl_kind)) 760 accessibility = default_accessibility; 761 } 762 763 ClangASTMetadata metadata; 764 metadata.SetUserID(die.GetID()); 765 metadata.SetIsDynamicCXXType(dwarf->ClassOrStructIsVirtual (die)); 766 767 if (type_name_cstr && strchr (type_name_cstr, '<')) 768 { 769 ClangASTContext::TemplateParameterInfos template_param_infos; 770 if (ParseTemplateParameterInfos (die, template_param_infos)) 771 { 772 clang::ClassTemplateDecl *class_template_decl = m_ast.ParseClassTemplateDecl (decl_ctx, 773 accessibility, 774 type_name_cstr, 775 tag_decl_kind, 776 template_param_infos); 777 778 clang::ClassTemplateSpecializationDecl *class_specialization_decl = m_ast.CreateClassTemplateSpecializationDecl (decl_ctx, 779 class_template_decl, 780 tag_decl_kind, 781 template_param_infos); 782 clang_type = m_ast.CreateClassTemplateSpecializationType (class_specialization_decl); 783 clang_type_was_created = true; 784 785 m_ast.SetMetadata (class_template_decl, metadata); 786 m_ast.SetMetadata (class_specialization_decl, metadata); 787 } 788 } 789 790 if (!clang_type_was_created) 791 { 792 clang_type_was_created = true; 793 clang_type = m_ast.CreateRecordType (decl_ctx, 794 accessibility, 795 type_name_cstr, 796 tag_decl_kind, 797 class_language, 798 &metadata); 799 } 800 } 801 802 // Store a forward declaration to this class type in case any 803 // parameters in any class methods need it for the clang 804 // types for function prototypes. 805 LinkDeclContextToDIE(m_ast.GetDeclContextForType(clang_type), die); 806 type_sp.reset (new Type (die.GetID(), 807 dwarf, 808 type_name_const_str, 809 byte_size, 810 NULL, 811 LLDB_INVALID_UID, 812 Type::eEncodingIsUID, 813 &decl, 814 clang_type, 815 Type::eResolveStateForward)); 816 817 type_sp->SetIsCompleteObjCClass(is_complete_objc_class); 818 819 820 // Add our type to the unique type map so we don't 821 // end up creating many copies of the same type over 822 // and over in the ASTContext for our module 823 unique_ast_entry_ap->m_type_sp = type_sp; 824 unique_ast_entry_ap->m_die = die; 825 unique_ast_entry_ap->m_declaration = decl; 826 unique_ast_entry_ap->m_byte_size = byte_size; 827 dwarf->GetUniqueDWARFASTTypeMap().Insert (type_name_const_str, 828 *unique_ast_entry_ap); 829 830 if (is_forward_declaration && die.HasChildren()) 831 { 832 // Check to see if the DIE actually has a definition, some version of GCC will 833 // emit DIEs with DW_AT_declaration set to true, but yet still have subprogram, 834 // members, or inheritance, so we can't trust it 835 DWARFDIE child_die = die.GetFirstChild(); 836 while (child_die) 837 { 838 switch (child_die.Tag()) 839 { 840 case DW_TAG_inheritance: 841 case DW_TAG_subprogram: 842 case DW_TAG_member: 843 case DW_TAG_APPLE_property: 844 case DW_TAG_class_type: 845 case DW_TAG_structure_type: 846 case DW_TAG_enumeration_type: 847 case DW_TAG_typedef: 848 case DW_TAG_union_type: 849 child_die.Clear(); 850 is_forward_declaration = false; 851 break; 852 default: 853 child_die = child_die.GetSibling(); 854 break; 855 } 856 } 857 } 858 859 if (!is_forward_declaration) 860 { 861 // Always start the definition for a class type so that 862 // if the class has child classes or types that require 863 // the class to be created for use as their decl contexts 864 // the class will be ready to accept these child definitions. 865 if (die.HasChildren() == false) 866 { 867 // No children for this struct/union/class, lets finish it 868 ClangASTContext::StartTagDeclarationDefinition (clang_type); 869 ClangASTContext::CompleteTagDeclarationDefinition (clang_type); 870 871 if (tag == DW_TAG_structure_type) // this only applies in C 872 { 873 clang::RecordDecl *record_decl = ClangASTContext::GetAsRecordDecl(clang_type); 874 875 if (record_decl) 876 m_record_decl_to_layout_map.insert(std::make_pair(record_decl, LayoutInfo())); 877 } 878 } 879 else if (clang_type_was_created) 880 { 881 // Start the definition if the class is not objective C since 882 // the underlying decls respond to isCompleteDefinition(). Objective 883 // C decls don't respond to isCompleteDefinition() so we can't 884 // start the declaration definition right away. For C++ class/union/structs 885 // we want to start the definition in case the class is needed as the 886 // declaration context for a contained class or type without the need 887 // to complete that type.. 888 889 if (class_language != eLanguageTypeObjC && 890 class_language != eLanguageTypeObjC_plus_plus) 891 ClangASTContext::StartTagDeclarationDefinition (clang_type); 892 893 // Leave this as a forward declaration until we need 894 // to know the details of the type. lldb_private::Type 895 // will automatically call the SymbolFile virtual function 896 // "SymbolFileDWARF::CompleteType(Type *)" 897 // When the definition needs to be defined. 898 assert(!dwarf->GetForwardDeclClangTypeToDie().count(ClangASTContext::RemoveFastQualifiers(clang_type).GetOpaqueQualType()) && 899 "Type already in the forward declaration map!"); 900 assert(((SymbolFileDWARF*)m_ast.GetSymbolFile())->UserIDMatches(die.GetDIERef().GetUID()) && 901 "Adding incorrect type to forward declaration map"); 902 dwarf->GetForwardDeclDieToClangType()[die.GetDIE()] = clang_type.GetOpaqueQualType(); 903 dwarf->GetForwardDeclClangTypeToDie()[ClangASTContext::RemoveFastQualifiers(clang_type).GetOpaqueQualType()] = die.GetDIERef(); 904 m_ast.SetHasExternalStorage (clang_type.GetOpaqueQualType(), true); 905 } 906 } 907 } 908 break; 909 910 case DW_TAG_enumeration_type: 911 { 912 // Set a bit that lets us know that we are currently parsing this 913 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 914 915 DWARFFormValue encoding_form; 916 917 const size_t num_attributes = die.GetAttributes (attributes); 918 if (num_attributes > 0) 919 { 920 uint32_t i; 921 922 for (i=0; i<num_attributes; ++i) 923 { 924 attr = attributes.AttributeAtIndex(i); 925 if (attributes.ExtractFormValueAtIndex(i, form_value)) 926 { 927 switch (attr) 928 { 929 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 930 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 931 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 932 case DW_AT_name: 933 type_name_cstr = form_value.AsCString(); 934 type_name_const_str.SetCString(type_name_cstr); 935 break; 936 case DW_AT_type: encoding_form = form_value; break; 937 case DW_AT_byte_size: byte_size = form_value.Unsigned(); break; 938 case DW_AT_accessibility: break; //accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 939 case DW_AT_declaration: is_forward_declaration = form_value.Boolean(); break; 940 case DW_AT_allocated: 941 case DW_AT_associated: 942 case DW_AT_bit_stride: 943 case DW_AT_byte_stride: 944 case DW_AT_data_location: 945 case DW_AT_description: 946 case DW_AT_start_scope: 947 case DW_AT_visibility: 948 case DW_AT_specification: 949 case DW_AT_abstract_origin: 950 case DW_AT_sibling: 951 break; 952 } 953 } 954 } 955 956 if (is_forward_declaration) 957 { 958 type_sp = ParseTypeFromDWO(die, log); 959 if (type_sp) 960 return type_sp; 961 962 DWARFDeclContext die_decl_ctx; 963 die.GetDWARFDeclContext(die_decl_ctx); 964 965 type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx); 966 967 if (!type_sp) 968 { 969 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 970 if (debug_map_symfile) 971 { 972 // We weren't able to find a full declaration in 973 // this DWARF, see if we have a declaration anywhere 974 // else... 975 type_sp = debug_map_symfile->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx); 976 } 977 } 978 979 if (type_sp) 980 { 981 if (log) 982 { 983 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 984 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, complete type is 0x%8.8" PRIx64, 985 static_cast<void*>(this), 986 die.GetOffset(), 987 DW_TAG_value_to_name(tag), 988 type_name_cstr, 989 type_sp->GetID()); 990 } 991 992 // We found a real definition for this type elsewhere 993 // so lets use it and cache the fact that we found 994 // a complete type for this die 995 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 996 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE( 997 dwarf->DebugInfo()->GetDIE(DIERef(type_sp->GetID()))); 998 if (defn_decl_ctx) 999 LinkDeclContextToDIE(defn_decl_ctx, die); 1000 return type_sp; 1001 } 1002 1003 } 1004 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr); 1005 1006 CompilerType enumerator_clang_type; 1007 clang_type.SetCompilerType (&m_ast, dwarf->GetForwardDeclDieToClangType().lookup (die.GetDIE())); 1008 if (!clang_type) 1009 { 1010 if (encoding_form.IsValid()) 1011 { 1012 Type *enumerator_type = dwarf->ResolveTypeUID(DIERef(encoding_form).GetUID()); 1013 if (enumerator_type) 1014 enumerator_clang_type = enumerator_type->GetFullCompilerType (); 1015 } 1016 1017 if (!enumerator_clang_type) 1018 enumerator_clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize (NULL, 1019 DW_ATE_signed, 1020 byte_size * 8); 1021 1022 clang_type = m_ast.CreateEnumerationType (type_name_cstr, 1023 GetClangDeclContextContainingDIE (die, nullptr), 1024 decl, 1025 enumerator_clang_type); 1026 } 1027 else 1028 { 1029 enumerator_clang_type = m_ast.GetEnumerationIntegerType (clang_type.GetOpaqueQualType()); 1030 } 1031 1032 LinkDeclContextToDIE(ClangASTContext::GetDeclContextForType(clang_type), die); 1033 1034 type_sp.reset( new Type (die.GetID(), 1035 dwarf, 1036 type_name_const_str, 1037 byte_size, 1038 NULL, 1039 DIERef(encoding_form).GetUID(), 1040 Type::eEncodingIsUID, 1041 &decl, 1042 clang_type, 1043 Type::eResolveStateForward)); 1044 1045 ClangASTContext::StartTagDeclarationDefinition (clang_type); 1046 if (die.HasChildren()) 1047 { 1048 SymbolContext cu_sc(die.GetLLDBCompileUnit()); 1049 bool is_signed = false; 1050 enumerator_clang_type.IsIntegerType(is_signed); 1051 ParseChildEnumerators(cu_sc, clang_type, is_signed, type_sp->GetByteSize(), die); 1052 } 1053 ClangASTContext::CompleteTagDeclarationDefinition (clang_type); 1054 } 1055 } 1056 break; 1057 1058 case DW_TAG_inlined_subroutine: 1059 case DW_TAG_subprogram: 1060 case DW_TAG_subroutine_type: 1061 { 1062 // Set a bit that lets us know that we are currently parsing this 1063 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1064 1065 DWARFFormValue type_die_form; 1066 bool is_variadic = false; 1067 bool is_inline = false; 1068 bool is_static = false; 1069 bool is_virtual = false; 1070 bool is_explicit = false; 1071 bool is_artificial = false; 1072 DWARFFormValue specification_die_form; 1073 DWARFFormValue abstract_origin_die_form; 1074 dw_offset_t object_pointer_die_offset = DW_INVALID_OFFSET; 1075 1076 unsigned type_quals = 0; 1077 clang::StorageClass storage = clang::SC_None;//, Extern, Static, PrivateExtern 1078 1079 1080 const size_t num_attributes = die.GetAttributes (attributes); 1081 if (num_attributes > 0) 1082 { 1083 uint32_t i; 1084 for (i=0; i<num_attributes; ++i) 1085 { 1086 attr = attributes.AttributeAtIndex(i); 1087 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1088 { 1089 switch (attr) 1090 { 1091 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 1092 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 1093 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 1094 case DW_AT_name: 1095 type_name_cstr = form_value.AsCString(); 1096 type_name_const_str.SetCString(type_name_cstr); 1097 break; 1098 1099 case DW_AT_linkage_name: 1100 case DW_AT_MIPS_linkage_name: break; // mangled = form_value.AsCString(&dwarf->get_debug_str_data()); break; 1101 case DW_AT_type: type_die_form = form_value; break; 1102 case DW_AT_accessibility: accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 1103 case DW_AT_declaration: break; // is_forward_declaration = form_value.Boolean(); break; 1104 case DW_AT_inline: is_inline = form_value.Boolean(); break; 1105 case DW_AT_virtuality: is_virtual = form_value.Boolean(); break; 1106 case DW_AT_explicit: is_explicit = form_value.Boolean(); break; 1107 case DW_AT_artificial: is_artificial = form_value.Boolean(); break; 1108 1109 1110 case DW_AT_external: 1111 if (form_value.Unsigned()) 1112 { 1113 if (storage == clang::SC_None) 1114 storage = clang::SC_Extern; 1115 else 1116 storage = clang::SC_PrivateExtern; 1117 } 1118 break; 1119 1120 case DW_AT_specification: 1121 specification_die_form = form_value; 1122 break; 1123 1124 case DW_AT_abstract_origin: 1125 abstract_origin_die_form = form_value; 1126 break; 1127 1128 case DW_AT_object_pointer: 1129 object_pointer_die_offset = form_value.Reference(); 1130 break; 1131 1132 case DW_AT_allocated: 1133 case DW_AT_associated: 1134 case DW_AT_address_class: 1135 case DW_AT_calling_convention: 1136 case DW_AT_data_location: 1137 case DW_AT_elemental: 1138 case DW_AT_entry_pc: 1139 case DW_AT_frame_base: 1140 case DW_AT_high_pc: 1141 case DW_AT_low_pc: 1142 case DW_AT_prototyped: 1143 case DW_AT_pure: 1144 case DW_AT_ranges: 1145 case DW_AT_recursive: 1146 case DW_AT_return_addr: 1147 case DW_AT_segment: 1148 case DW_AT_start_scope: 1149 case DW_AT_static_link: 1150 case DW_AT_trampoline: 1151 case DW_AT_visibility: 1152 case DW_AT_vtable_elem_location: 1153 case DW_AT_description: 1154 case DW_AT_sibling: 1155 break; 1156 } 1157 } 1158 } 1159 } 1160 1161 std::string object_pointer_name; 1162 if (object_pointer_die_offset != DW_INVALID_OFFSET) 1163 { 1164 DWARFDIE object_pointer_die = die.GetDIE (object_pointer_die_offset); 1165 if (object_pointer_die) 1166 { 1167 const char *object_pointer_name_cstr = object_pointer_die.GetName(); 1168 if (object_pointer_name_cstr) 1169 object_pointer_name = object_pointer_name_cstr; 1170 } 1171 } 1172 1173 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr); 1174 1175 CompilerType return_clang_type; 1176 Type *func_type = NULL; 1177 1178 if (type_die_form.IsValid()) 1179 func_type = dwarf->ResolveTypeUID(DIERef(type_die_form).GetUID()); 1180 1181 if (func_type) 1182 return_clang_type = func_type->GetForwardCompilerType (); 1183 else 1184 return_clang_type = m_ast.GetBasicType(eBasicTypeVoid); 1185 1186 1187 std::vector<CompilerType> function_param_types; 1188 std::vector<clang::ParmVarDecl*> function_param_decls; 1189 1190 // Parse the function children for the parameters 1191 1192 DWARFDIE decl_ctx_die; 1193 clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (die, &decl_ctx_die); 1194 const clang::Decl::Kind containing_decl_kind = containing_decl_ctx->getDeclKind(); 1195 1196 const bool is_cxx_method = DeclKindIsCXXClass (containing_decl_kind); 1197 // Start off static. This will be set to false in ParseChildParameters(...) 1198 // if we find a "this" parameters as the first parameter 1199 if (is_cxx_method) 1200 is_static = true; 1201 1202 if (die.HasChildren()) 1203 { 1204 bool skip_artificial = true; 1205 ParseChildParameters (sc, 1206 containing_decl_ctx, 1207 die, 1208 skip_artificial, 1209 is_static, 1210 is_variadic, 1211 function_param_types, 1212 function_param_decls, 1213 type_quals); 1214 } 1215 1216 // clang_type will get the function prototype clang type after this call 1217 clang_type = m_ast.CreateFunctionType (return_clang_type, 1218 function_param_types.data(), 1219 function_param_types.size(), 1220 is_variadic, 1221 type_quals); 1222 1223 bool ignore_containing_context = false; 1224 1225 if (type_name_cstr) 1226 { 1227 bool type_handled = false; 1228 if (tag == DW_TAG_subprogram || 1229 tag == DW_TAG_inlined_subroutine) 1230 { 1231 ObjCLanguage::MethodName objc_method (type_name_cstr, true); 1232 if (objc_method.IsValid(true)) 1233 { 1234 CompilerType class_opaque_type; 1235 ConstString class_name(objc_method.GetClassName()); 1236 if (class_name) 1237 { 1238 TypeSP complete_objc_class_type_sp (dwarf->FindCompleteObjCDefinitionTypeForDIE (DWARFDIE(), class_name, false)); 1239 1240 if (complete_objc_class_type_sp) 1241 { 1242 CompilerType type_clang_forward_type = complete_objc_class_type_sp->GetForwardCompilerType (); 1243 if (ClangASTContext::IsObjCObjectOrInterfaceType(type_clang_forward_type)) 1244 class_opaque_type = type_clang_forward_type; 1245 } 1246 } 1247 1248 if (class_opaque_type) 1249 { 1250 // If accessibility isn't set to anything valid, assume public for 1251 // now... 1252 if (accessibility == eAccessNone) 1253 accessibility = eAccessPublic; 1254 1255 clang::ObjCMethodDecl *objc_method_decl = m_ast.AddMethodToObjCObjectType (class_opaque_type, 1256 type_name_cstr, 1257 clang_type, 1258 accessibility, 1259 is_artificial); 1260 type_handled = objc_method_decl != NULL; 1261 if (type_handled) 1262 { 1263 LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(objc_method_decl), die); 1264 m_ast.SetMetadataAsUserID (objc_method_decl, die.GetID()); 1265 } 1266 else 1267 { 1268 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", 1269 die.GetOffset(), 1270 tag, 1271 DW_TAG_value_to_name(tag)); 1272 } 1273 } 1274 } 1275 else if (is_cxx_method) 1276 { 1277 // Look at the parent of this DIE and see if is is 1278 // a class or struct and see if this is actually a 1279 // C++ method 1280 Type *class_type = dwarf->ResolveType (decl_ctx_die); 1281 if (class_type) 1282 { 1283 bool alternate_defn = false; 1284 if (class_type->GetID() != decl_ctx_die.GetID() || decl_ctx_die.GetContainingDWOModuleDIE()) 1285 { 1286 alternate_defn = true; 1287 1288 // We uniqued the parent class of this function to another class 1289 // so we now need to associate all dies under "decl_ctx_die" to 1290 // DIEs in the DIE for "class_type"... 1291 SymbolFileDWARF *class_symfile = NULL; 1292 DWARFDIE class_type_die; 1293 1294 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 1295 if (debug_map_symfile) 1296 { 1297 class_symfile = debug_map_symfile->GetSymbolFileByOSOIndex(SymbolFileDWARFDebugMap::GetOSOIndexFromUserID(class_type->GetID())); 1298 class_type_die = class_symfile->DebugInfo()->GetDIE (DIERef(class_type->GetID())); 1299 } 1300 else 1301 { 1302 class_symfile = dwarf; 1303 class_type_die = dwarf->DebugInfo()->GetDIE (DIERef(class_type->GetID())); 1304 } 1305 if (class_type_die) 1306 { 1307 DWARFDIECollection failures; 1308 1309 CopyUniqueClassMethodTypes (decl_ctx_die, 1310 class_type_die, 1311 class_type, 1312 failures); 1313 1314 // FIXME do something with these failures that's smarter than 1315 // just dropping them on the ground. Unfortunately classes don't 1316 // like having stuff added to them after their definitions are 1317 // complete... 1318 1319 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1320 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) 1321 { 1322 type_sp = type_ptr->shared_from_this(); 1323 break; 1324 } 1325 } 1326 } 1327 1328 if (specification_die_form.IsValid()) 1329 { 1330 // We have a specification which we are going to base our function 1331 // prototype off of, so we need this type to be completed so that the 1332 // m_die_to_decl_ctx for the method in the specification has a valid 1333 // clang decl context. 1334 class_type->GetForwardCompilerType (); 1335 // If we have a specification, then the function type should have been 1336 // made with the specification and not with this die. 1337 DWARFDIE spec_die = dwarf->DebugInfo()->GetDIE(DIERef(specification_die_form)); 1338 clang::DeclContext *spec_clang_decl_ctx = GetClangDeclContextForDIE (spec_die); 1339 if (spec_clang_decl_ctx) 1340 { 1341 LinkDeclContextToDIE(spec_clang_decl_ctx, die); 1342 } 1343 else 1344 { 1345 dwarf->GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8" PRIx64 ") has no decl\n", 1346 die.GetID(), 1347 specification_die_form.Reference()); 1348 } 1349 type_handled = true; 1350 } 1351 else if (abstract_origin_die_form.IsValid()) 1352 { 1353 // We have a specification which we are going to base our function 1354 // prototype off of, so we need this type to be completed so that the 1355 // m_die_to_decl_ctx for the method in the abstract origin has a valid 1356 // clang decl context. 1357 class_type->GetForwardCompilerType (); 1358 1359 DWARFDIE abs_die = dwarf->DebugInfo()->GetDIE (DIERef(abstract_origin_die_form)); 1360 clang::DeclContext *abs_clang_decl_ctx = GetClangDeclContextForDIE (abs_die); 1361 if (abs_clang_decl_ctx) 1362 { 1363 LinkDeclContextToDIE (abs_clang_decl_ctx, die); 1364 } 1365 else 1366 { 1367 dwarf->GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8" PRIx64 ") has no decl\n", 1368 die.GetID(), 1369 abstract_origin_die_form.Reference()); 1370 } 1371 type_handled = true; 1372 } 1373 else 1374 { 1375 CompilerType class_opaque_type = class_type->GetForwardCompilerType (); 1376 if (ClangASTContext::IsCXXClassType(class_opaque_type)) 1377 { 1378 if (class_opaque_type.IsBeingDefined () || alternate_defn) 1379 { 1380 if (!is_static && !die.HasChildren()) 1381 { 1382 // We have a C++ member function with no children (this pointer!) 1383 // and clang will get mad if we try and make a function that isn't 1384 // well formed in the DWARF, so we will just skip it... 1385 type_handled = true; 1386 } 1387 else 1388 { 1389 bool add_method = true; 1390 if (alternate_defn) 1391 { 1392 // If an alternate definition for the class exists, then add the method only if an 1393 // equivalent is not already present. 1394 clang::CXXRecordDecl *record_decl = m_ast.GetAsCXXRecordDecl(class_opaque_type.GetOpaqueQualType()); 1395 if (record_decl) 1396 { 1397 for (auto method_iter = record_decl->method_begin(); 1398 method_iter != record_decl->method_end(); 1399 method_iter++) 1400 { 1401 clang::CXXMethodDecl *method_decl = *method_iter; 1402 if (method_decl->getNameInfo().getAsString() == std::string(type_name_cstr)) 1403 { 1404 if (method_decl->getType() == ClangASTContext::GetQualType(clang_type)) 1405 { 1406 add_method = false; 1407 LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(method_decl), die); 1408 type_handled = true; 1409 1410 break; 1411 } 1412 } 1413 } 1414 } 1415 } 1416 1417 if (add_method) 1418 { 1419 // REMOVE THE CRASH DESCRIPTION BELOW 1420 Host::SetCrashDescriptionWithFormat ("SymbolFileDWARF::ParseType() is adding a method %s to class %s in DIE 0x%8.8" PRIx64 " from %s", 1421 type_name_cstr, 1422 class_type->GetName().GetCString(), 1423 die.GetID(), 1424 dwarf->GetObjectFile()->GetFileSpec().GetPath().c_str()); 1425 1426 const bool is_attr_used = false; 1427 // Neither GCC 4.2 nor clang++ currently set a valid accessibility 1428 // in the DWARF for C++ methods... Default to public for now... 1429 if (accessibility == eAccessNone) 1430 accessibility = eAccessPublic; 1431 1432 clang::CXXMethodDecl *cxx_method_decl; 1433 cxx_method_decl = m_ast.AddMethodToCXXRecordType (class_opaque_type.GetOpaqueQualType(), 1434 type_name_cstr, 1435 clang_type, 1436 accessibility, 1437 is_virtual, 1438 is_static, 1439 is_inline, 1440 is_explicit, 1441 is_attr_used, 1442 is_artificial); 1443 1444 type_handled = cxx_method_decl != NULL; 1445 1446 if (type_handled) 1447 { 1448 LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(cxx_method_decl), die); 1449 1450 Host::SetCrashDescription (NULL); 1451 1452 ClangASTMetadata metadata; 1453 metadata.SetUserID(die.GetID()); 1454 1455 if (!object_pointer_name.empty()) 1456 { 1457 metadata.SetObjectPtrName(object_pointer_name.c_str()); 1458 if (log) 1459 log->Printf ("Setting object pointer name: %s on method object %p.\n", 1460 object_pointer_name.c_str(), 1461 static_cast<void*>(cxx_method_decl)); 1462 } 1463 m_ast.SetMetadata (cxx_method_decl, metadata); 1464 } 1465 else 1466 { 1467 ignore_containing_context = true; 1468 } 1469 } 1470 } 1471 } 1472 else 1473 { 1474 // We were asked to parse the type for a method in a class, yet the 1475 // class hasn't been asked to complete itself through the 1476 // clang::ExternalASTSource protocol, so we need to just have the 1477 // class complete itself and do things the right way, then our 1478 // DIE should then have an entry in the dwarf->GetDIEToType() map. First 1479 // we need to modify the dwarf->GetDIEToType() so it doesn't think we are 1480 // trying to parse this DIE anymore... 1481 dwarf->GetDIEToType()[die.GetDIE()] = NULL; 1482 1483 // Now we get the full type to force our class type to complete itself 1484 // using the clang::ExternalASTSource protocol which will parse all 1485 // base classes and all methods (including the method for this DIE). 1486 class_type->GetFullCompilerType (); 1487 1488 // The type for this DIE should have been filled in the function call above 1489 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1490 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) 1491 { 1492 type_sp = type_ptr->shared_from_this(); 1493 break; 1494 } 1495 1496 // FIXME This is fixing some even uglier behavior but we really need to 1497 // uniq the methods of each class as well as the class itself. 1498 // <rdar://problem/11240464> 1499 type_handled = true; 1500 } 1501 } 1502 } 1503 } 1504 } 1505 } 1506 1507 if (!type_handled) 1508 { 1509 // We just have a function that isn't part of a class 1510 clang::FunctionDecl *function_decl = m_ast.CreateFunctionDeclaration (ignore_containing_context ? m_ast.GetTranslationUnitDecl() : containing_decl_ctx, 1511 type_name_cstr, 1512 clang_type, 1513 storage, 1514 is_inline); 1515 1516 // if (template_param_infos.GetSize() > 0) 1517 // { 1518 // clang::FunctionTemplateDecl *func_template_decl = CreateFunctionTemplateDecl (containing_decl_ctx, 1519 // function_decl, 1520 // type_name_cstr, 1521 // template_param_infos); 1522 // 1523 // CreateFunctionTemplateSpecializationInfo (function_decl, 1524 // func_template_decl, 1525 // template_param_infos); 1526 // } 1527 // Add the decl to our DIE to decl context map 1528 assert (function_decl); 1529 LinkDeclContextToDIE(function_decl, die); 1530 if (!function_param_decls.empty()) 1531 m_ast.SetFunctionParameters (function_decl, 1532 &function_param_decls.front(), 1533 function_param_decls.size()); 1534 1535 ClangASTMetadata metadata; 1536 metadata.SetUserID(die.GetID()); 1537 1538 if (!object_pointer_name.empty()) 1539 { 1540 metadata.SetObjectPtrName(object_pointer_name.c_str()); 1541 if (log) 1542 log->Printf ("Setting object pointer name: %s on function object %p.", 1543 object_pointer_name.c_str(), 1544 static_cast<void*>(function_decl)); 1545 } 1546 m_ast.SetMetadata (function_decl, metadata); 1547 } 1548 } 1549 type_sp.reset( new Type (die.GetID(), 1550 dwarf, 1551 type_name_const_str, 1552 0, 1553 NULL, 1554 LLDB_INVALID_UID, 1555 Type::eEncodingIsUID, 1556 &decl, 1557 clang_type, 1558 Type::eResolveStateFull)); 1559 assert(type_sp.get()); 1560 } 1561 break; 1562 1563 case DW_TAG_array_type: 1564 { 1565 // Set a bit that lets us know that we are currently parsing this 1566 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1567 1568 DWARFFormValue type_die_form; 1569 int64_t first_index = 0; 1570 uint32_t byte_stride = 0; 1571 uint32_t bit_stride = 0; 1572 bool is_vector = false; 1573 const size_t num_attributes = die.GetAttributes (attributes); 1574 1575 if (num_attributes > 0) 1576 { 1577 uint32_t i; 1578 for (i=0; i<num_attributes; ++i) 1579 { 1580 attr = attributes.AttributeAtIndex(i); 1581 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1582 { 1583 switch (attr) 1584 { 1585 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 1586 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 1587 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 1588 case DW_AT_name: 1589 type_name_cstr = form_value.AsCString(); 1590 type_name_const_str.SetCString(type_name_cstr); 1591 break; 1592 1593 case DW_AT_type: type_die_form = form_value; break; 1594 case DW_AT_byte_size: break; // byte_size = form_value.Unsigned(); break; 1595 case DW_AT_byte_stride: byte_stride = form_value.Unsigned(); break; 1596 case DW_AT_bit_stride: bit_stride = form_value.Unsigned(); break; 1597 case DW_AT_GNU_vector: is_vector = form_value.Boolean(); break; 1598 case DW_AT_accessibility: break; // accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 1599 case DW_AT_declaration: break; // is_forward_declaration = form_value.Boolean(); break; 1600 case DW_AT_allocated: 1601 case DW_AT_associated: 1602 case DW_AT_data_location: 1603 case DW_AT_description: 1604 case DW_AT_ordering: 1605 case DW_AT_start_scope: 1606 case DW_AT_visibility: 1607 case DW_AT_specification: 1608 case DW_AT_abstract_origin: 1609 case DW_AT_sibling: 1610 break; 1611 } 1612 } 1613 } 1614 1615 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr); 1616 1617 Type *element_type = dwarf->ResolveTypeUID(DIERef(type_die_form).GetUID()); 1618 1619 if (element_type) 1620 { 1621 std::vector<uint64_t> element_orders; 1622 ParseChildArrayInfo(sc, die, first_index, element_orders, byte_stride, bit_stride); 1623 if (byte_stride == 0 && bit_stride == 0) 1624 byte_stride = element_type->GetByteSize(); 1625 CompilerType array_element_type = element_type->GetForwardCompilerType (); 1626 uint64_t array_element_bit_stride = byte_stride * 8 + bit_stride; 1627 if (element_orders.size() > 0) 1628 { 1629 uint64_t num_elements = 0; 1630 std::vector<uint64_t>::const_reverse_iterator pos; 1631 std::vector<uint64_t>::const_reverse_iterator end = element_orders.rend(); 1632 for (pos = element_orders.rbegin(); pos != end; ++pos) 1633 { 1634 num_elements = *pos; 1635 clang_type = m_ast.CreateArrayType (array_element_type, 1636 num_elements, 1637 is_vector); 1638 array_element_type = clang_type; 1639 array_element_bit_stride = num_elements ? 1640 array_element_bit_stride * num_elements : 1641 array_element_bit_stride; 1642 } 1643 } 1644 else 1645 { 1646 clang_type = m_ast.CreateArrayType (array_element_type, 0, is_vector); 1647 } 1648 ConstString empty_name; 1649 type_sp.reset( new Type (die.GetID(), 1650 dwarf, 1651 empty_name, 1652 array_element_bit_stride / 8, 1653 NULL, 1654 DIERef(type_die_form).GetUID(), 1655 Type::eEncodingIsUID, 1656 &decl, 1657 clang_type, 1658 Type::eResolveStateFull)); 1659 type_sp->SetEncodingType (element_type); 1660 } 1661 } 1662 } 1663 break; 1664 1665 case DW_TAG_ptr_to_member_type: 1666 { 1667 DWARFFormValue type_die_form; 1668 DWARFFormValue containing_type_die_form; 1669 1670 const size_t num_attributes = die.GetAttributes (attributes); 1671 1672 if (num_attributes > 0) { 1673 uint32_t i; 1674 for (i=0; i<num_attributes; ++i) 1675 { 1676 attr = attributes.AttributeAtIndex(i); 1677 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1678 { 1679 switch (attr) 1680 { 1681 case DW_AT_type: 1682 type_die_form = form_value; break; 1683 case DW_AT_containing_type: 1684 containing_type_die_form = form_value; break; 1685 } 1686 } 1687 } 1688 1689 Type *pointee_type = dwarf->ResolveTypeUID(DIERef(type_die_form).GetUID()); 1690 Type *class_type = dwarf->ResolveTypeUID(DIERef(containing_type_die_form).GetUID()); 1691 1692 CompilerType pointee_clang_type = pointee_type->GetForwardCompilerType (); 1693 CompilerType class_clang_type = class_type->GetLayoutCompilerType (); 1694 1695 clang_type = ClangASTContext::CreateMemberPointerType(class_clang_type, pointee_clang_type); 1696 1697 byte_size = clang_type.GetByteSize(nullptr); 1698 1699 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, byte_size, NULL, 1700 LLDB_INVALID_UID, Type::eEncodingIsUID, NULL, clang_type, 1701 Type::eResolveStateForward)); 1702 } 1703 1704 break; 1705 } 1706 default: 1707 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", 1708 die.GetOffset(), 1709 tag, 1710 DW_TAG_value_to_name(tag)); 1711 break; 1712 } 1713 1714 if (type_sp.get()) 1715 { 1716 DWARFDIE sc_parent_die = SymbolFileDWARF::GetParentSymbolContextDIE(die); 1717 dw_tag_t sc_parent_tag = sc_parent_die.Tag(); 1718 1719 SymbolContextScope * symbol_context_scope = NULL; 1720 if (sc_parent_tag == DW_TAG_compile_unit) 1721 { 1722 symbol_context_scope = sc.comp_unit; 1723 } 1724 else if (sc.function != NULL && sc_parent_die) 1725 { 1726 symbol_context_scope = sc.function->GetBlock(true).FindBlockByID(sc_parent_die.GetID()); 1727 if (symbol_context_scope == NULL) 1728 symbol_context_scope = sc.function; 1729 } 1730 1731 if (symbol_context_scope != NULL) 1732 { 1733 type_sp->SetSymbolContextScope(symbol_context_scope); 1734 } 1735 1736 // We are ready to put this type into the uniqued list up at the module level 1737 type_list->Insert (type_sp); 1738 1739 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1740 } 1741 } 1742 else if (type_ptr != DIE_IS_BEING_PARSED) 1743 { 1744 type_sp = type_ptr->shared_from_this(); 1745 } 1746 } 1747 return type_sp; 1748 } 1749 1750 // DWARF parsing functions 1751 1752 class DWARFASTParserClang::DelayedAddObjCClassProperty 1753 { 1754 public: 1755 DelayedAddObjCClassProperty(const CompilerType &class_opaque_type, 1756 const char *property_name, 1757 const CompilerType &property_opaque_type, // The property type is only required if you don't have an ivar decl 1758 clang::ObjCIvarDecl *ivar_decl, 1759 const char *property_setter_name, 1760 const char *property_getter_name, 1761 uint32_t property_attributes, 1762 const ClangASTMetadata *metadata) : 1763 m_class_opaque_type (class_opaque_type), 1764 m_property_name (property_name), 1765 m_property_opaque_type (property_opaque_type), 1766 m_ivar_decl (ivar_decl), 1767 m_property_setter_name (property_setter_name), 1768 m_property_getter_name (property_getter_name), 1769 m_property_attributes (property_attributes) 1770 { 1771 if (metadata != NULL) 1772 { 1773 m_metadata_ap.reset(new ClangASTMetadata()); 1774 *m_metadata_ap = *metadata; 1775 } 1776 } 1777 1778 DelayedAddObjCClassProperty (const DelayedAddObjCClassProperty &rhs) 1779 { 1780 *this = rhs; 1781 } 1782 1783 DelayedAddObjCClassProperty& operator= (const DelayedAddObjCClassProperty &rhs) 1784 { 1785 m_class_opaque_type = rhs.m_class_opaque_type; 1786 m_property_name = rhs.m_property_name; 1787 m_property_opaque_type = rhs.m_property_opaque_type; 1788 m_ivar_decl = rhs.m_ivar_decl; 1789 m_property_setter_name = rhs.m_property_setter_name; 1790 m_property_getter_name = rhs.m_property_getter_name; 1791 m_property_attributes = rhs.m_property_attributes; 1792 1793 if (rhs.m_metadata_ap.get()) 1794 { 1795 m_metadata_ap.reset (new ClangASTMetadata()); 1796 *m_metadata_ap = *rhs.m_metadata_ap; 1797 } 1798 return *this; 1799 } 1800 1801 bool 1802 Finalize() 1803 { 1804 return ClangASTContext::AddObjCClassProperty (m_class_opaque_type, 1805 m_property_name, 1806 m_property_opaque_type, 1807 m_ivar_decl, 1808 m_property_setter_name, 1809 m_property_getter_name, 1810 m_property_attributes, 1811 m_metadata_ap.get()); 1812 } 1813 1814 private: 1815 CompilerType m_class_opaque_type; 1816 const char *m_property_name; 1817 CompilerType m_property_opaque_type; 1818 clang::ObjCIvarDecl *m_ivar_decl; 1819 const char *m_property_setter_name; 1820 const char *m_property_getter_name; 1821 uint32_t m_property_attributes; 1822 std::unique_ptr<ClangASTMetadata> m_metadata_ap; 1823 }; 1824 1825 bool 1826 DWARFASTParserClang::ParseTemplateDIE (const DWARFDIE &die, 1827 ClangASTContext::TemplateParameterInfos &template_param_infos) 1828 { 1829 const dw_tag_t tag = die.Tag(); 1830 1831 switch (tag) 1832 { 1833 case DW_TAG_template_type_parameter: 1834 case DW_TAG_template_value_parameter: 1835 { 1836 DWARFAttributes attributes; 1837 const size_t num_attributes = die.GetAttributes (attributes); 1838 const char *name = NULL; 1839 Type *lldb_type = NULL; 1840 CompilerType clang_type; 1841 uint64_t uval64 = 0; 1842 bool uval64_valid = false; 1843 if (num_attributes > 0) 1844 { 1845 DWARFFormValue form_value; 1846 for (size_t i=0; i<num_attributes; ++i) 1847 { 1848 const dw_attr_t attr = attributes.AttributeAtIndex(i); 1849 1850 switch (attr) 1851 { 1852 case DW_AT_name: 1853 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1854 name = form_value.AsCString(); 1855 break; 1856 1857 case DW_AT_type: 1858 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1859 { 1860 lldb_type = die.ResolveTypeUID(DIERef(form_value).GetUID()); 1861 if (lldb_type) 1862 clang_type = lldb_type->GetForwardCompilerType (); 1863 } 1864 break; 1865 1866 case DW_AT_const_value: 1867 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1868 { 1869 uval64_valid = true; 1870 uval64 = form_value.Unsigned(); 1871 } 1872 break; 1873 default: 1874 break; 1875 } 1876 } 1877 1878 clang::ASTContext *ast = m_ast.getASTContext(); 1879 if (!clang_type) 1880 clang_type = m_ast.GetBasicType(eBasicTypeVoid); 1881 1882 if (clang_type) 1883 { 1884 bool is_signed = false; 1885 if (name && name[0]) 1886 template_param_infos.names.push_back(name); 1887 else 1888 template_param_infos.names.push_back(NULL); 1889 1890 if (tag == DW_TAG_template_value_parameter && 1891 lldb_type != NULL && 1892 clang_type.IsIntegerType (is_signed) && 1893 uval64_valid) 1894 { 1895 llvm::APInt apint (lldb_type->GetByteSize() * 8, uval64, is_signed); 1896 template_param_infos.args.push_back (clang::TemplateArgument (*ast, 1897 llvm::APSInt(apint), 1898 ClangASTContext::GetQualType(clang_type))); 1899 } 1900 else 1901 { 1902 template_param_infos.args.push_back (clang::TemplateArgument (ClangASTContext::GetQualType(clang_type))); 1903 } 1904 } 1905 else 1906 { 1907 return false; 1908 } 1909 1910 } 1911 } 1912 return true; 1913 1914 default: 1915 break; 1916 } 1917 return false; 1918 } 1919 1920 bool 1921 DWARFASTParserClang::ParseTemplateParameterInfos (const DWARFDIE &parent_die, 1922 ClangASTContext::TemplateParameterInfos &template_param_infos) 1923 { 1924 1925 if (!parent_die) 1926 return false; 1927 1928 Args template_parameter_names; 1929 for (DWARFDIE die = parent_die.GetFirstChild(); 1930 die.IsValid(); 1931 die = die.GetSibling()) 1932 { 1933 const dw_tag_t tag = die.Tag(); 1934 1935 switch (tag) 1936 { 1937 case DW_TAG_template_type_parameter: 1938 case DW_TAG_template_value_parameter: 1939 ParseTemplateDIE (die, template_param_infos); 1940 break; 1941 1942 default: 1943 break; 1944 } 1945 } 1946 if (template_param_infos.args.empty()) 1947 return false; 1948 return template_param_infos.args.size() == template_param_infos.names.size(); 1949 } 1950 1951 bool 1952 DWARFASTParserClang::CanCompleteType (const lldb_private::CompilerType &compiler_type) 1953 { 1954 if (m_clang_ast_importer_ap) 1955 return ClangASTContext::CanImport(compiler_type, GetClangASTImporter()); 1956 else 1957 return false; 1958 } 1959 1960 bool 1961 DWARFASTParserClang::CompleteType (const lldb_private::CompilerType &compiler_type) 1962 { 1963 if (CanCompleteType(compiler_type)) 1964 { 1965 if (ClangASTContext::Import(compiler_type, GetClangASTImporter())) 1966 { 1967 ClangASTContext::CompleteTagDeclarationDefinition(compiler_type); 1968 return true; 1969 } 1970 else 1971 { 1972 ClangASTContext::SetHasExternalStorage (compiler_type.GetOpaqueQualType(), false); 1973 } 1974 } 1975 return false; 1976 } 1977 1978 bool 1979 DWARFASTParserClang::CompleteTypeFromDWARF (const DWARFDIE &die, 1980 lldb_private::Type *type, 1981 CompilerType &clang_type) 1982 { 1983 // Disable external storage for this type so we don't get anymore 1984 // clang::ExternalASTSource queries for this type. 1985 m_ast.SetHasExternalStorage (clang_type.GetOpaqueQualType(), false); 1986 1987 if (!die) 1988 return false; 1989 1990 const dw_tag_t tag = die.Tag(); 1991 1992 SymbolFileDWARF *dwarf = die.GetDWARF(); 1993 1994 Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION)); 1995 if (log) 1996 dwarf->GetObjectFile()->GetModule()->LogMessageVerboseBacktrace (log, 1997 "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...", 1998 die.GetID(), 1999 die.GetTagAsCString(), 2000 type->GetName().AsCString()); 2001 assert (clang_type); 2002 DWARFAttributes attributes; 2003 switch (tag) 2004 { 2005 case DW_TAG_structure_type: 2006 case DW_TAG_union_type: 2007 case DW_TAG_class_type: 2008 { 2009 LayoutInfo layout_info; 2010 2011 { 2012 if (die.HasChildren()) 2013 { 2014 LanguageType class_language = eLanguageTypeUnknown; 2015 if (ClangASTContext::IsObjCObjectOrInterfaceType(clang_type)) 2016 { 2017 class_language = eLanguageTypeObjC; 2018 // For objective C we don't start the definition when 2019 // the class is created. 2020 ClangASTContext::StartTagDeclarationDefinition (clang_type); 2021 } 2022 2023 int tag_decl_kind = -1; 2024 AccessType default_accessibility = eAccessNone; 2025 if (tag == DW_TAG_structure_type) 2026 { 2027 tag_decl_kind = clang::TTK_Struct; 2028 default_accessibility = eAccessPublic; 2029 } 2030 else if (tag == DW_TAG_union_type) 2031 { 2032 tag_decl_kind = clang::TTK_Union; 2033 default_accessibility = eAccessPublic; 2034 } 2035 else if (tag == DW_TAG_class_type) 2036 { 2037 tag_decl_kind = clang::TTK_Class; 2038 default_accessibility = eAccessPrivate; 2039 } 2040 2041 SymbolContext sc(die.GetLLDBCompileUnit()); 2042 std::vector<clang::CXXBaseSpecifier *> base_classes; 2043 std::vector<int> member_accessibilities; 2044 bool is_a_class = false; 2045 // Parse members and base classes first 2046 DWARFDIECollection member_function_dies; 2047 2048 DelayedPropertyList delayed_properties; 2049 ParseChildMembers (sc, 2050 die, 2051 clang_type, 2052 class_language, 2053 base_classes, 2054 member_accessibilities, 2055 member_function_dies, 2056 delayed_properties, 2057 default_accessibility, 2058 is_a_class, 2059 layout_info); 2060 2061 // Now parse any methods if there were any... 2062 size_t num_functions = member_function_dies.Size(); 2063 if (num_functions > 0) 2064 { 2065 for (size_t i=0; i<num_functions; ++i) 2066 { 2067 dwarf->ResolveType(member_function_dies.GetDIEAtIndex(i)); 2068 } 2069 } 2070 2071 if (class_language == eLanguageTypeObjC) 2072 { 2073 ConstString class_name (clang_type.GetTypeName()); 2074 if (class_name) 2075 { 2076 DIEArray method_die_offsets; 2077 dwarf->GetObjCMethodDIEOffsets(class_name, method_die_offsets); 2078 2079 if (!method_die_offsets.empty()) 2080 { 2081 DWARFDebugInfo* debug_info = dwarf->DebugInfo(); 2082 2083 const size_t num_matches = method_die_offsets.size(); 2084 for (size_t i=0; i<num_matches; ++i) 2085 { 2086 const DIERef& die_ref = method_die_offsets[i]; 2087 DWARFDIE method_die = debug_info->GetDIE (die_ref); 2088 2089 if (method_die) 2090 method_die.ResolveType (); 2091 } 2092 } 2093 2094 for (DelayedPropertyList::iterator pi = delayed_properties.begin(), pe = delayed_properties.end(); 2095 pi != pe; 2096 ++pi) 2097 pi->Finalize(); 2098 } 2099 } 2100 2101 // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we 2102 // need to tell the clang type it is actually a class. 2103 if (class_language != eLanguageTypeObjC) 2104 { 2105 if (is_a_class && tag_decl_kind != clang::TTK_Class) 2106 m_ast.SetTagTypeKind (ClangASTContext::GetQualType(clang_type), clang::TTK_Class); 2107 } 2108 2109 // Since DW_TAG_structure_type gets used for both classes 2110 // and structures, we may need to set any DW_TAG_member 2111 // fields to have a "private" access if none was specified. 2112 // When we parsed the child members we tracked that actual 2113 // accessibility value for each DW_TAG_member in the 2114 // "member_accessibilities" array. If the value for the 2115 // member is zero, then it was set to the "default_accessibility" 2116 // which for structs was "public". Below we correct this 2117 // by setting any fields to "private" that weren't correctly 2118 // set. 2119 if (is_a_class && !member_accessibilities.empty()) 2120 { 2121 // This is a class and all members that didn't have 2122 // their access specified are private. 2123 m_ast.SetDefaultAccessForRecordFields (m_ast.GetAsRecordDecl(clang_type), 2124 eAccessPrivate, 2125 &member_accessibilities.front(), 2126 member_accessibilities.size()); 2127 } 2128 2129 if (!base_classes.empty()) 2130 { 2131 // Make sure all base classes refer to complete types and not 2132 // forward declarations. If we don't do this, clang will crash 2133 // with an assertion in the call to clang_type.SetBaseClassesForClassType() 2134 for (auto &base_class : base_classes) 2135 { 2136 clang::TypeSourceInfo *type_source_info = base_class->getTypeSourceInfo(); 2137 if (type_source_info) 2138 { 2139 CompilerType base_class_type (&m_ast, type_source_info->getType().getAsOpaquePtr()); 2140 if (base_class_type.GetCompleteType() == false) 2141 { 2142 auto module = dwarf->GetObjectFile()->GetModule(); 2143 module->ReportError ( 2144 ":: Class '%s' has a base class '%s' which does not have a complete definition.", 2145 die.GetName(), 2146 base_class_type.GetTypeName().GetCString()); 2147 if (die.GetCU()->GetProducer() == DWARFCompileUnit::eProducerClang) 2148 module->ReportError (":: Try compiling the source file with -fno-limit-debug-info."); 2149 2150 // We have no choice other than to pretend that the base class 2151 // is complete. If we don't do this, clang will crash when we 2152 // call setBases() inside of "clang_type.SetBaseClassesForClassType()" 2153 // below. Since we provide layout assistance, all ivars in this 2154 // class and other classes will be fine, this is the best we can do 2155 // short of crashing. 2156 ClangASTContext::StartTagDeclarationDefinition (base_class_type); 2157 ClangASTContext::CompleteTagDeclarationDefinition (base_class_type); 2158 } 2159 } 2160 } 2161 m_ast.SetBaseClassesForClassType (clang_type.GetOpaqueQualType(), 2162 &base_classes.front(), 2163 base_classes.size()); 2164 2165 // Clang will copy each CXXBaseSpecifier in "base_classes" 2166 // so we have to free them all. 2167 ClangASTContext::DeleteBaseClassSpecifiers (&base_classes.front(), 2168 base_classes.size()); 2169 } 2170 } 2171 } 2172 2173 ClangASTContext::BuildIndirectFields (clang_type); 2174 ClangASTContext::CompleteTagDeclarationDefinition (clang_type); 2175 2176 if (!layout_info.field_offsets.empty() || 2177 !layout_info.base_offsets.empty() || 2178 !layout_info.vbase_offsets.empty() ) 2179 { 2180 if (type) 2181 layout_info.bit_size = type->GetByteSize() * 8; 2182 if (layout_info.bit_size == 0) 2183 layout_info.bit_size = die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 0) * 8; 2184 2185 clang::CXXRecordDecl *record_decl = m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 2186 if (record_decl) 2187 { 2188 if (log) 2189 { 2190 ModuleSP module_sp = dwarf->GetObjectFile()->GetModule(); 2191 2192 if (module_sp) 2193 { 2194 module_sp->LogMessage (log, 2195 "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])", 2196 static_cast<void*>(clang_type.GetOpaqueQualType()), 2197 static_cast<void*>(record_decl), 2198 layout_info.bit_size, 2199 layout_info.alignment, 2200 static_cast<uint32_t>(layout_info.field_offsets.size()), 2201 static_cast<uint32_t>(layout_info.base_offsets.size()), 2202 static_cast<uint32_t>(layout_info.vbase_offsets.size())); 2203 2204 uint32_t idx; 2205 { 2206 llvm::DenseMap<const clang::FieldDecl *, uint64_t>::const_iterator pos, 2207 end = layout_info.field_offsets.end(); 2208 for (idx = 0, pos = layout_info.field_offsets.begin(); pos != end; ++pos, ++idx) 2209 { 2210 module_sp->LogMessage(log, 2211 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) field[%u] = { bit_offset=%u, name='%s' }", 2212 static_cast<void *>(clang_type.GetOpaqueQualType()), 2213 idx, 2214 static_cast<uint32_t>(pos->second), 2215 pos->first->getNameAsString().c_str()); 2216 } 2217 } 2218 2219 { 2220 llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits>::const_iterator base_pos, 2221 base_end = layout_info.base_offsets.end(); 2222 for (idx = 0, base_pos = layout_info.base_offsets.begin(); base_pos != base_end; ++base_pos, ++idx) 2223 { 2224 module_sp->LogMessage(log, 2225 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) base[%u] = { byte_offset=%u, name='%s' }", 2226 clang_type.GetOpaqueQualType(), idx, (uint32_t)base_pos->second.getQuantity(), 2227 base_pos->first->getNameAsString().c_str()); 2228 } 2229 } 2230 { 2231 llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits>::const_iterator vbase_pos, 2232 vbase_end = layout_info.vbase_offsets.end(); 2233 for (idx = 0, vbase_pos = layout_info.vbase_offsets.begin(); vbase_pos != vbase_end; ++vbase_pos, ++idx) 2234 { 2235 module_sp->LogMessage(log, 2236 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) vbase[%u] = { byte_offset=%u, name='%s' }", 2237 static_cast<void *>(clang_type.GetOpaqueQualType()), idx, 2238 static_cast<uint32_t>(vbase_pos->second.getQuantity()), 2239 vbase_pos->first->getNameAsString().c_str()); 2240 } 2241 } 2242 2243 } 2244 } 2245 m_record_decl_to_layout_map.insert(std::make_pair(record_decl, layout_info)); 2246 } 2247 } 2248 } 2249 2250 return (bool)clang_type; 2251 2252 case DW_TAG_enumeration_type: 2253 ClangASTContext::StartTagDeclarationDefinition (clang_type); 2254 if (die.HasChildren()) 2255 { 2256 SymbolContext sc(die.GetLLDBCompileUnit()); 2257 bool is_signed = false; 2258 clang_type.IsIntegerType(is_signed); 2259 ParseChildEnumerators(sc, clang_type, is_signed, type->GetByteSize(), die); 2260 } 2261 ClangASTContext::CompleteTagDeclarationDefinition (clang_type); 2262 return (bool)clang_type; 2263 2264 default: 2265 assert(false && "not a forward clang type decl!"); 2266 break; 2267 } 2268 2269 return false; 2270 } 2271 2272 std::vector<DWARFDIE> 2273 DWARFASTParserClang::GetDIEForDeclContext(lldb_private::CompilerDeclContext decl_context) 2274 { 2275 std::vector<DWARFDIE> result; 2276 for (auto it = m_decl_ctx_to_die.find((clang::DeclContext *)decl_context.GetOpaqueDeclContext()); it != m_decl_ctx_to_die.end(); it++) 2277 result.push_back(it->second); 2278 return result; 2279 } 2280 2281 CompilerDecl 2282 DWARFASTParserClang::GetDeclForUIDFromDWARF (const DWARFDIE &die) 2283 { 2284 clang::Decl *clang_decl = GetClangDeclForDIE(die); 2285 if (clang_decl != nullptr) 2286 return CompilerDecl(&m_ast, clang_decl); 2287 return CompilerDecl(); 2288 } 2289 2290 CompilerDeclContext 2291 DWARFASTParserClang::GetDeclContextForUIDFromDWARF (const DWARFDIE &die) 2292 { 2293 clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE (die); 2294 if (clang_decl_ctx) 2295 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2296 return CompilerDeclContext(); 2297 } 2298 2299 CompilerDeclContext 2300 DWARFASTParserClang::GetDeclContextContainingUIDFromDWARF (const DWARFDIE &die) 2301 { 2302 clang::DeclContext *clang_decl_ctx = GetClangDeclContextContainingDIE (die, nullptr); 2303 if (clang_decl_ctx) 2304 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2305 return CompilerDeclContext(); 2306 } 2307 2308 size_t 2309 DWARFASTParserClang::ParseChildEnumerators (const SymbolContext& sc, 2310 lldb_private::CompilerType &clang_type, 2311 bool is_signed, 2312 uint32_t enumerator_byte_size, 2313 const DWARFDIE &parent_die) 2314 { 2315 if (!parent_die) 2316 return 0; 2317 2318 size_t enumerators_added = 0; 2319 2320 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); die = die.GetSibling()) 2321 { 2322 const dw_tag_t tag = die.Tag(); 2323 if (tag == DW_TAG_enumerator) 2324 { 2325 DWARFAttributes attributes; 2326 const size_t num_child_attributes = die.GetAttributes(attributes); 2327 if (num_child_attributes > 0) 2328 { 2329 const char *name = NULL; 2330 bool got_value = false; 2331 int64_t enum_value = 0; 2332 Declaration decl; 2333 2334 uint32_t i; 2335 for (i=0; i<num_child_attributes; ++i) 2336 { 2337 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2338 DWARFFormValue form_value; 2339 if (attributes.ExtractFormValueAtIndex(i, form_value)) 2340 { 2341 switch (attr) 2342 { 2343 case DW_AT_const_value: 2344 got_value = true; 2345 if (is_signed) 2346 enum_value = form_value.Signed(); 2347 else 2348 enum_value = form_value.Unsigned(); 2349 break; 2350 2351 case DW_AT_name: 2352 name = form_value.AsCString(); 2353 break; 2354 2355 case DW_AT_description: 2356 default: 2357 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 2358 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 2359 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 2360 case DW_AT_sibling: 2361 break; 2362 } 2363 } 2364 } 2365 2366 if (name && name[0] && got_value) 2367 { 2368 m_ast.AddEnumerationValueToEnumerationType (clang_type.GetOpaqueQualType(), 2369 m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType()), 2370 decl, 2371 name, 2372 enum_value, 2373 enumerator_byte_size * 8); 2374 ++enumerators_added; 2375 } 2376 } 2377 } 2378 } 2379 return enumerators_added; 2380 } 2381 2382 #if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE) 2383 2384 class DIEStack 2385 { 2386 public: 2387 2388 void Push (const DWARFDIE &die) 2389 { 2390 m_dies.push_back (die); 2391 } 2392 2393 2394 void LogDIEs (Log *log) 2395 { 2396 StreamString log_strm; 2397 const size_t n = m_dies.size(); 2398 log_strm.Printf("DIEStack[%" PRIu64 "]:\n", (uint64_t)n); 2399 for (size_t i=0; i<n; i++) 2400 { 2401 std::string qualified_name; 2402 const DWARFDIE &die = m_dies[i]; 2403 die.GetQualifiedName(qualified_name); 2404 log_strm.Printf ("[%" PRIu64 "] 0x%8.8x: %s name='%s'\n", 2405 (uint64_t)i, 2406 die.GetOffset(), 2407 die.GetTagAsCString(), 2408 qualified_name.c_str()); 2409 } 2410 log->PutCString(log_strm.GetData()); 2411 } 2412 void Pop () 2413 { 2414 m_dies.pop_back(); 2415 } 2416 2417 class ScopedPopper 2418 { 2419 public: 2420 ScopedPopper (DIEStack &die_stack) : 2421 m_die_stack (die_stack), 2422 m_valid (false) 2423 { 2424 } 2425 2426 void 2427 Push (const DWARFDIE &die) 2428 { 2429 m_valid = true; 2430 m_die_stack.Push (die); 2431 } 2432 2433 ~ScopedPopper () 2434 { 2435 if (m_valid) 2436 m_die_stack.Pop(); 2437 } 2438 2439 2440 2441 protected: 2442 DIEStack &m_die_stack; 2443 bool m_valid; 2444 }; 2445 2446 protected: 2447 typedef std::vector<DWARFDIE> Stack; 2448 Stack m_dies; 2449 }; 2450 #endif 2451 2452 Function * 2453 DWARFASTParserClang::ParseFunctionFromDWARF (const SymbolContext& sc, 2454 const DWARFDIE &die) 2455 { 2456 DWARFRangeList func_ranges; 2457 const char *name = NULL; 2458 const char *mangled = NULL; 2459 int decl_file = 0; 2460 int decl_line = 0; 2461 int decl_column = 0; 2462 int call_file = 0; 2463 int call_line = 0; 2464 int call_column = 0; 2465 DWARFExpression frame_base(die.GetCU()); 2466 2467 const dw_tag_t tag = die.Tag(); 2468 2469 if (tag != DW_TAG_subprogram) 2470 return NULL; 2471 2472 if (die.GetDIENamesAndRanges (name, 2473 mangled, 2474 func_ranges, 2475 decl_file, 2476 decl_line, 2477 decl_column, 2478 call_file, 2479 call_line, 2480 call_column, 2481 &frame_base)) 2482 { 2483 2484 // Union of all ranges in the function DIE (if the function is discontiguous) 2485 AddressRange func_range; 2486 lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase (0); 2487 lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd (0); 2488 if (lowest_func_addr != LLDB_INVALID_ADDRESS && lowest_func_addr <= highest_func_addr) 2489 { 2490 ModuleSP module_sp (die.GetModule()); 2491 func_range.GetBaseAddress().ResolveAddressUsingFileSections (lowest_func_addr, module_sp->GetSectionList()); 2492 if (func_range.GetBaseAddress().IsValid()) 2493 func_range.SetByteSize(highest_func_addr - lowest_func_addr); 2494 } 2495 2496 if (func_range.GetBaseAddress().IsValid()) 2497 { 2498 Mangled func_name; 2499 if (mangled) 2500 func_name.SetValue(ConstString(mangled), true); 2501 else if (die.GetParent().Tag() == DW_TAG_compile_unit && 2502 Language::LanguageIsCPlusPlus(die.GetLanguage()) && 2503 name && strcmp(name, "main") != 0) 2504 { 2505 // If the mangled name is not present in the DWARF, generate the demangled name 2506 // using the decl context. We skip if the function is "main" as its name is 2507 // never mangled. 2508 bool is_static = false; 2509 bool is_variadic = false; 2510 unsigned type_quals = 0; 2511 std::vector<CompilerType> param_types; 2512 std::vector<clang::ParmVarDecl*> param_decls; 2513 DWARFDeclContext decl_ctx; 2514 StreamString sstr; 2515 2516 die.GetDWARFDeclContext(decl_ctx); 2517 sstr << decl_ctx.GetQualifiedName(); 2518 2519 clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE(die, nullptr); 2520 ParseChildParameters(sc, 2521 containing_decl_ctx, 2522 die, 2523 true, 2524 is_static, 2525 is_variadic, 2526 param_types, 2527 param_decls, 2528 type_quals); 2529 sstr << "("; 2530 for (size_t i = 0; i < param_types.size(); i++) 2531 { 2532 if (i > 0) 2533 sstr << ", "; 2534 sstr << param_types[i].GetTypeName(); 2535 } 2536 if (is_variadic) 2537 sstr << ", ..."; 2538 sstr << ")"; 2539 if (type_quals & clang::Qualifiers::Const) 2540 sstr << " const"; 2541 2542 func_name.SetValue(ConstString(sstr.GetData()), false); 2543 } 2544 else 2545 func_name.SetValue(ConstString(name), false); 2546 2547 FunctionSP func_sp; 2548 std::unique_ptr<Declaration> decl_ap; 2549 if (decl_file != 0 || decl_line != 0 || decl_column != 0) 2550 decl_ap.reset(new Declaration (sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file), 2551 decl_line, 2552 decl_column)); 2553 2554 SymbolFileDWARF *dwarf = die.GetDWARF(); 2555 // Supply the type _only_ if it has already been parsed 2556 Type *func_type = dwarf->GetDIEToType().lookup (die.GetDIE()); 2557 2558 assert(func_type == NULL || func_type != DIE_IS_BEING_PARSED); 2559 2560 if (dwarf->FixupAddress (func_range.GetBaseAddress())) 2561 { 2562 const user_id_t func_user_id = die.GetID(); 2563 func_sp.reset(new Function (sc.comp_unit, 2564 func_user_id, // UserID is the DIE offset 2565 func_user_id, 2566 func_name, 2567 func_type, 2568 func_range)); // first address range 2569 2570 if (func_sp.get() != NULL) 2571 { 2572 if (frame_base.IsValid()) 2573 func_sp->GetFrameBaseExpression() = frame_base; 2574 sc.comp_unit->AddFunction(func_sp); 2575 return func_sp.get(); 2576 } 2577 } 2578 } 2579 } 2580 return NULL; 2581 } 2582 2583 2584 bool 2585 DWARFASTParserClang::ParseChildMembers (const SymbolContext& sc, 2586 const DWARFDIE &parent_die, 2587 CompilerType &class_clang_type, 2588 const LanguageType class_language, 2589 std::vector<clang::CXXBaseSpecifier *>& base_classes, 2590 std::vector<int>& member_accessibilities, 2591 DWARFDIECollection& member_function_dies, 2592 DelayedPropertyList& delayed_properties, 2593 AccessType& default_accessibility, 2594 bool &is_a_class, 2595 LayoutInfo &layout_info) 2596 { 2597 if (!parent_die) 2598 return 0; 2599 2600 uint32_t member_idx = 0; 2601 BitfieldInfo last_field_info; 2602 2603 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule(); 2604 ClangASTContext *ast = llvm::dyn_cast_or_null<ClangASTContext>(class_clang_type.GetTypeSystem()); 2605 if (ast == nullptr) 2606 return 0; 2607 2608 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); die = die.GetSibling()) 2609 { 2610 dw_tag_t tag = die.Tag(); 2611 2612 switch (tag) 2613 { 2614 case DW_TAG_member: 2615 case DW_TAG_APPLE_property: 2616 { 2617 DWARFAttributes attributes; 2618 const size_t num_attributes = die.GetAttributes (attributes); 2619 if (num_attributes > 0) 2620 { 2621 Declaration decl; 2622 //DWARFExpression location; 2623 const char *name = NULL; 2624 const char *prop_name = NULL; 2625 const char *prop_getter_name = NULL; 2626 const char *prop_setter_name = NULL; 2627 uint32_t prop_attributes = 0; 2628 2629 2630 bool is_artificial = false; 2631 DWARFFormValue encoding_form; 2632 AccessType accessibility = eAccessNone; 2633 uint32_t member_byte_offset = UINT32_MAX; 2634 size_t byte_size = 0; 2635 size_t bit_offset = 0; 2636 size_t bit_size = 0; 2637 bool is_external = false; // On DW_TAG_members, this means the member is static 2638 uint32_t i; 2639 for (i=0; i<num_attributes && !is_artificial; ++i) 2640 { 2641 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2642 DWARFFormValue form_value; 2643 if (attributes.ExtractFormValueAtIndex(i, form_value)) 2644 { 2645 switch (attr) 2646 { 2647 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 2648 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 2649 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 2650 case DW_AT_name: name = form_value.AsCString(); break; 2651 case DW_AT_type: encoding_form = form_value; break; 2652 case DW_AT_bit_offset: bit_offset = form_value.Unsigned(); break; 2653 case DW_AT_bit_size: bit_size = form_value.Unsigned(); break; 2654 case DW_AT_byte_size: byte_size = form_value.Unsigned(); break; 2655 case DW_AT_data_member_location: 2656 if (form_value.BlockData()) 2657 { 2658 Value initialValue(0); 2659 Value memberOffset(0); 2660 const DWARFDataExtractor& debug_info_data = die.GetDWARF()->get_debug_info_data(); 2661 uint32_t block_length = form_value.Unsigned(); 2662 uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart(); 2663 if (DWARFExpression::Evaluate(NULL, // ExecutionContext * 2664 NULL, // ClangExpressionVariableList * 2665 NULL, // ClangExpressionDeclMap * 2666 NULL, // RegisterContext * 2667 module_sp, 2668 debug_info_data, 2669 die.GetCU(), 2670 block_offset, 2671 block_length, 2672 eRegisterKindDWARF, 2673 &initialValue, 2674 memberOffset, 2675 NULL)) 2676 { 2677 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 2678 } 2679 } 2680 else 2681 { 2682 // With DWARF 3 and later, if the value is an integer constant, 2683 // this form value is the offset in bytes from the beginning 2684 // of the containing entity. 2685 member_byte_offset = form_value.Unsigned(); 2686 } 2687 break; 2688 2689 case DW_AT_accessibility: accessibility = DW_ACCESS_to_AccessType (form_value.Unsigned()); break; 2690 case DW_AT_artificial: is_artificial = form_value.Boolean(); break; 2691 case DW_AT_APPLE_property_name: prop_name = form_value.AsCString(); 2692 break; 2693 case DW_AT_APPLE_property_getter: prop_getter_name = form_value.AsCString(); 2694 break; 2695 case DW_AT_APPLE_property_setter: prop_setter_name = form_value.AsCString(); 2696 break; 2697 case DW_AT_APPLE_property_attribute: prop_attributes = form_value.Unsigned(); break; 2698 case DW_AT_external: is_external = form_value.Boolean(); break; 2699 2700 default: 2701 case DW_AT_declaration: 2702 case DW_AT_description: 2703 case DW_AT_mutable: 2704 case DW_AT_visibility: 2705 case DW_AT_sibling: 2706 break; 2707 } 2708 } 2709 } 2710 2711 if (prop_name) 2712 { 2713 ConstString fixed_getter; 2714 ConstString fixed_setter; 2715 2716 // Check if the property getter/setter were provided as full 2717 // names. We want basenames, so we extract them. 2718 2719 if (prop_getter_name && prop_getter_name[0] == '-') 2720 { 2721 ObjCLanguage::MethodName prop_getter_method(prop_getter_name, true); 2722 prop_getter_name = prop_getter_method.GetSelector().GetCString(); 2723 } 2724 2725 if (prop_setter_name && prop_setter_name[0] == '-') 2726 { 2727 ObjCLanguage::MethodName prop_setter_method(prop_setter_name, true); 2728 prop_setter_name = prop_setter_method.GetSelector().GetCString(); 2729 } 2730 2731 // If the names haven't been provided, they need to be 2732 // filled in. 2733 2734 if (!prop_getter_name) 2735 { 2736 prop_getter_name = prop_name; 2737 } 2738 if (!prop_setter_name && prop_name[0] && !(prop_attributes & DW_APPLE_PROPERTY_readonly)) 2739 { 2740 StreamString ss; 2741 2742 ss.Printf("set%c%s:", 2743 toupper(prop_name[0]), 2744 &prop_name[1]); 2745 2746 fixed_setter.SetCString(ss.GetData()); 2747 prop_setter_name = fixed_setter.GetCString(); 2748 } 2749 } 2750 2751 // Clang has a DWARF generation bug where sometimes it 2752 // represents fields that are references with bad byte size 2753 // and bit size/offset information such as: 2754 // 2755 // DW_AT_byte_size( 0x00 ) 2756 // DW_AT_bit_size( 0x40 ) 2757 // DW_AT_bit_offset( 0xffffffffffffffc0 ) 2758 // 2759 // So check the bit offset to make sure it is sane, and if 2760 // the values are not sane, remove them. If we don't do this 2761 // then we will end up with a crash if we try to use this 2762 // type in an expression when clang becomes unhappy with its 2763 // recycled debug info. 2764 2765 if (bit_offset > 128) 2766 { 2767 bit_size = 0; 2768 bit_offset = 0; 2769 } 2770 2771 // FIXME: Make Clang ignore Objective-C accessibility for expressions 2772 if (class_language == eLanguageTypeObjC || 2773 class_language == eLanguageTypeObjC_plus_plus) 2774 accessibility = eAccessNone; 2775 2776 if (member_idx == 0 && !is_artificial && name && (strstr (name, "_vptr$") == name)) 2777 { 2778 // Not all compilers will mark the vtable pointer 2779 // member as artificial (llvm-gcc). We can't have 2780 // the virtual members in our classes otherwise it 2781 // throws off all child offsets since we end up 2782 // having and extra pointer sized member in our 2783 // class layouts. 2784 is_artificial = true; 2785 } 2786 2787 // Handle static members 2788 if (is_external && member_byte_offset == UINT32_MAX) 2789 { 2790 Type *var_type = die.ResolveTypeUID(DIERef(encoding_form).GetUID()); 2791 2792 if (var_type) 2793 { 2794 if (accessibility == eAccessNone) 2795 accessibility = eAccessPublic; 2796 ClangASTContext::AddVariableToRecordType (class_clang_type, 2797 name, 2798 var_type->GetLayoutCompilerType (), 2799 accessibility); 2800 } 2801 break; 2802 } 2803 2804 if (is_artificial == false) 2805 { 2806 Type *member_type = die.ResolveTypeUID(DIERef(encoding_form).GetUID()); 2807 2808 clang::FieldDecl *field_decl = NULL; 2809 if (tag == DW_TAG_member) 2810 { 2811 if (member_type) 2812 { 2813 if (accessibility == eAccessNone) 2814 accessibility = default_accessibility; 2815 member_accessibilities.push_back(accessibility); 2816 2817 uint64_t field_bit_offset = (member_byte_offset == UINT32_MAX ? 0 : (member_byte_offset * 8)); 2818 if (bit_size > 0) 2819 { 2820 2821 BitfieldInfo this_field_info; 2822 this_field_info.bit_offset = field_bit_offset; 2823 this_field_info.bit_size = bit_size; 2824 2825 ///////////////////////////////////////////////////////////// 2826 // How to locate a field given the DWARF debug information 2827 // 2828 // AT_byte_size indicates the size of the word in which the 2829 // bit offset must be interpreted. 2830 // 2831 // AT_data_member_location indicates the byte offset of the 2832 // word from the base address of the structure. 2833 // 2834 // AT_bit_offset indicates how many bits into the word 2835 // (according to the host endianness) the low-order bit of 2836 // the field starts. AT_bit_offset can be negative. 2837 // 2838 // AT_bit_size indicates the size of the field in bits. 2839 ///////////////////////////////////////////////////////////// 2840 2841 if (byte_size == 0) 2842 byte_size = member_type->GetByteSize(); 2843 2844 if (die.GetDWARF()->GetObjectFile()->GetByteOrder() == eByteOrderLittle) 2845 { 2846 this_field_info.bit_offset += byte_size * 8; 2847 this_field_info.bit_offset -= (bit_offset + bit_size); 2848 } 2849 else 2850 { 2851 this_field_info.bit_offset += bit_offset; 2852 } 2853 2854 // Update the field bit offset we will report for layout 2855 field_bit_offset = this_field_info.bit_offset; 2856 2857 // If the member to be emitted did not start on a character boundary and there is 2858 // empty space between the last field and this one, then we need to emit an 2859 // anonymous member filling up the space up to its start. There are three cases 2860 // here: 2861 // 2862 // 1 If the previous member ended on a character boundary, then we can emit an 2863 // anonymous member starting at the most recent character boundary. 2864 // 2865 // 2 If the previous member did not end on a character boundary and the distance 2866 // from the end of the previous member to the current member is less than a 2867 // word width, then we can emit an anonymous member starting right after the 2868 // previous member and right before this member. 2869 // 2870 // 3 If the previous member did not end on a character boundary and the distance 2871 // from the end of the previous member to the current member is greater than 2872 // or equal a word width, then we act as in Case 1. 2873 2874 const uint64_t character_width = 8; 2875 const uint64_t word_width = 32; 2876 2877 // Objective-C has invalid DW_AT_bit_offset values in older versions 2878 // of clang, so we have to be careful and only insert unnamed bitfields 2879 // if we have a new enough clang. 2880 bool detect_unnamed_bitfields = true; 2881 2882 if (class_language == eLanguageTypeObjC || class_language == eLanguageTypeObjC_plus_plus) 2883 detect_unnamed_bitfields = die.GetCU()->Supports_unnamed_objc_bitfields (); 2884 2885 if (detect_unnamed_bitfields) 2886 { 2887 BitfieldInfo anon_field_info; 2888 2889 if ((this_field_info.bit_offset % character_width) != 0) // not char aligned 2890 { 2891 uint64_t last_field_end = 0; 2892 2893 if (last_field_info.IsValid()) 2894 last_field_end = last_field_info.bit_offset + last_field_info.bit_size; 2895 2896 if (this_field_info.bit_offset != last_field_end) 2897 { 2898 if (((last_field_end % character_width) == 0) || // case 1 2899 (this_field_info.bit_offset - last_field_end >= word_width)) // case 3 2900 { 2901 anon_field_info.bit_size = this_field_info.bit_offset % character_width; 2902 anon_field_info.bit_offset = this_field_info.bit_offset - anon_field_info.bit_size; 2903 } 2904 else // case 2 2905 { 2906 anon_field_info.bit_size = this_field_info.bit_offset - last_field_end; 2907 anon_field_info.bit_offset = last_field_end; 2908 } 2909 } 2910 } 2911 2912 if (anon_field_info.IsValid()) 2913 { 2914 clang::FieldDecl *unnamed_bitfield_decl = 2915 ClangASTContext::AddFieldToRecordType (class_clang_type, 2916 NULL, 2917 m_ast.GetBuiltinTypeForEncodingAndBitSize(eEncodingSint, word_width), 2918 accessibility, 2919 anon_field_info.bit_size); 2920 2921 layout_info.field_offsets.insert( 2922 std::make_pair(unnamed_bitfield_decl, anon_field_info.bit_offset)); 2923 } 2924 } 2925 last_field_info = this_field_info; 2926 } 2927 else 2928 { 2929 last_field_info.Clear(); 2930 } 2931 2932 CompilerType member_clang_type = member_type->GetLayoutCompilerType (); 2933 if (!member_clang_type.IsCompleteType()) 2934 member_clang_type.GetCompleteType(); 2935 2936 { 2937 // Older versions of clang emit array[0] and array[1] in the same way (<rdar://problem/12566646>). 2938 // If the current field is at the end of the structure, then there is definitely no room for extra 2939 // elements and we override the type to array[0]. 2940 2941 CompilerType member_array_element_type; 2942 uint64_t member_array_size; 2943 bool member_array_is_incomplete; 2944 2945 if (member_clang_type.IsArrayType(&member_array_element_type, 2946 &member_array_size, 2947 &member_array_is_incomplete) && 2948 !member_array_is_incomplete) 2949 { 2950 uint64_t parent_byte_size = parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, UINT64_MAX); 2951 2952 if (member_byte_offset >= parent_byte_size) 2953 { 2954 if (member_array_size != 1 && (member_array_size != 0 || member_byte_offset > parent_byte_size)) 2955 { 2956 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, 2957 die.GetID(), 2958 name, 2959 encoding_form.Reference(), 2960 parent_die.GetID()); 2961 } 2962 2963 member_clang_type = m_ast.CreateArrayType(member_array_element_type, 0, false); 2964 } 2965 } 2966 } 2967 2968 if (ClangASTContext::IsCXXClassType(member_clang_type) && member_clang_type.GetCompleteType() == false) 2969 { 2970 if (die.GetCU()->GetProducer() == DWARFCompileUnit::eProducerClang) 2971 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", 2972 parent_die.GetOffset(), 2973 parent_die.GetName(), 2974 die.GetOffset(), 2975 name); 2976 else 2977 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", 2978 parent_die.GetOffset(), 2979 parent_die.GetName(), 2980 die.GetOffset(), 2981 name, 2982 sc.comp_unit ? sc.comp_unit->GetPath().c_str() : "the source file"); 2983 // We have no choice other than to pretend that the member class 2984 // is complete. If we don't do this, clang will crash when trying 2985 // to layout the class. Since we provide layout assistance, all 2986 // ivars in this class and other classes will be fine, this is 2987 // the best we can do short of crashing. 2988 ClangASTContext::StartTagDeclarationDefinition(member_clang_type); 2989 ClangASTContext::CompleteTagDeclarationDefinition(member_clang_type); 2990 } 2991 2992 field_decl = ClangASTContext::AddFieldToRecordType (class_clang_type, 2993 name, 2994 member_clang_type, 2995 accessibility, 2996 bit_size); 2997 2998 m_ast.SetMetadataAsUserID (field_decl, die.GetID()); 2999 3000 layout_info.field_offsets.insert(std::make_pair(field_decl, field_bit_offset)); 3001 } 3002 else 3003 { 3004 if (name) 3005 module_sp->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 " which was unable to be parsed", 3006 die.GetID(), 3007 name, 3008 encoding_form.Reference()); 3009 else 3010 module_sp->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member refers to type 0x%8.8" PRIx64 " which was unable to be parsed", 3011 die.GetID(), 3012 encoding_form.Reference()); 3013 } 3014 } 3015 3016 if (prop_name != NULL && member_type) 3017 { 3018 clang::ObjCIvarDecl *ivar_decl = NULL; 3019 3020 if (field_decl) 3021 { 3022 ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl); 3023 assert (ivar_decl != NULL); 3024 } 3025 3026 ClangASTMetadata metadata; 3027 metadata.SetUserID (die.GetID()); 3028 delayed_properties.push_back(DelayedAddObjCClassProperty(class_clang_type, 3029 prop_name, 3030 member_type->GetLayoutCompilerType (), 3031 ivar_decl, 3032 prop_setter_name, 3033 prop_getter_name, 3034 prop_attributes, 3035 &metadata)); 3036 3037 if (ivar_decl) 3038 m_ast.SetMetadataAsUserID (ivar_decl, die.GetID()); 3039 } 3040 } 3041 } 3042 ++member_idx; 3043 } 3044 break; 3045 3046 case DW_TAG_subprogram: 3047 // Let the type parsing code handle this one for us. 3048 member_function_dies.Append (die); 3049 break; 3050 3051 case DW_TAG_inheritance: 3052 { 3053 is_a_class = true; 3054 if (default_accessibility == eAccessNone) 3055 default_accessibility = eAccessPrivate; 3056 // TODO: implement DW_TAG_inheritance type parsing 3057 DWARFAttributes attributes; 3058 const size_t num_attributes = die.GetAttributes (attributes); 3059 if (num_attributes > 0) 3060 { 3061 Declaration decl; 3062 DWARFExpression location(die.GetCU()); 3063 DWARFFormValue encoding_form; 3064 AccessType accessibility = default_accessibility; 3065 bool is_virtual = false; 3066 bool is_base_of_class = true; 3067 off_t member_byte_offset = 0; 3068 uint32_t i; 3069 for (i=0; i<num_attributes; ++i) 3070 { 3071 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3072 DWARFFormValue form_value; 3073 if (attributes.ExtractFormValueAtIndex(i, form_value)) 3074 { 3075 switch (attr) 3076 { 3077 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 3078 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 3079 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 3080 case DW_AT_type: encoding_form = form_value; break; 3081 case DW_AT_data_member_location: 3082 if (form_value.BlockData()) 3083 { 3084 Value initialValue(0); 3085 Value memberOffset(0); 3086 const DWARFDataExtractor& debug_info_data = die.GetDWARF()->get_debug_info_data(); 3087 uint32_t block_length = form_value.Unsigned(); 3088 uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart(); 3089 if (DWARFExpression::Evaluate (NULL, 3090 NULL, 3091 NULL, 3092 NULL, 3093 module_sp, 3094 debug_info_data, 3095 die.GetCU(), 3096 block_offset, 3097 block_length, 3098 eRegisterKindDWARF, 3099 &initialValue, 3100 memberOffset, 3101 NULL)) 3102 { 3103 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 3104 } 3105 } 3106 else 3107 { 3108 // With DWARF 3 and later, if the value is an integer constant, 3109 // this form value is the offset in bytes from the beginning 3110 // of the containing entity. 3111 member_byte_offset = form_value.Unsigned(); 3112 } 3113 break; 3114 3115 case DW_AT_accessibility: 3116 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 3117 break; 3118 3119 case DW_AT_virtuality: 3120 is_virtual = form_value.Boolean(); 3121 break; 3122 3123 case DW_AT_sibling: 3124 break; 3125 3126 default: 3127 break; 3128 } 3129 } 3130 } 3131 3132 Type *base_class_type = die.ResolveTypeUID(DIERef(encoding_form).GetUID()); 3133 if (base_class_type == NULL) 3134 { 3135 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", 3136 die.GetOffset(), 3137 encoding_form.Reference(), 3138 parent_die.GetOffset()); 3139 break; 3140 } 3141 3142 CompilerType base_class_clang_type = base_class_type->GetFullCompilerType (); 3143 assert (base_class_clang_type); 3144 if (class_language == eLanguageTypeObjC) 3145 { 3146 ast->SetObjCSuperClass(class_clang_type, base_class_clang_type); 3147 } 3148 else 3149 { 3150 base_classes.push_back (ast->CreateBaseClassSpecifier (base_class_clang_type.GetOpaqueQualType(), 3151 accessibility, 3152 is_virtual, 3153 is_base_of_class)); 3154 3155 if (is_virtual) 3156 { 3157 // Do not specify any offset for virtual inheritance. The DWARF produced by clang doesn't 3158 // give us a constant offset, but gives us a DWARF expressions that requires an actual object 3159 // in memory. the DW_AT_data_member_location for a virtual base class looks like: 3160 // DW_AT_data_member_location( DW_OP_dup, DW_OP_deref, DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref, DW_OP_plus ) 3161 // Given this, there is really no valid response we can give to clang for virtual base 3162 // class offsets, and this should eventually be removed from LayoutRecordType() in the external 3163 // AST source in clang. 3164 } 3165 else 3166 { 3167 layout_info.base_offsets.insert( 3168 std::make_pair(ast->GetAsCXXRecordDecl(base_class_clang_type.GetOpaqueQualType()), 3169 clang::CharUnits::fromQuantity(member_byte_offset))); 3170 } 3171 } 3172 } 3173 } 3174 break; 3175 3176 default: 3177 break; 3178 } 3179 } 3180 3181 return true; 3182 } 3183 3184 3185 size_t 3186 DWARFASTParserClang::ParseChildParameters (const SymbolContext& sc, 3187 clang::DeclContext *containing_decl_ctx, 3188 const DWARFDIE &parent_die, 3189 bool skip_artificial, 3190 bool &is_static, 3191 bool &is_variadic, 3192 std::vector<CompilerType>& function_param_types, 3193 std::vector<clang::ParmVarDecl*>& function_param_decls, 3194 unsigned &type_quals) 3195 { 3196 if (!parent_die) 3197 return 0; 3198 3199 size_t arg_idx = 0; 3200 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); die = die.GetSibling()) 3201 { 3202 const dw_tag_t tag = die.Tag(); 3203 switch (tag) 3204 { 3205 case DW_TAG_formal_parameter: 3206 { 3207 DWARFAttributes attributes; 3208 const size_t num_attributes = die.GetAttributes(attributes); 3209 if (num_attributes > 0) 3210 { 3211 const char *name = NULL; 3212 Declaration decl; 3213 DWARFFormValue param_type_die_form; 3214 bool is_artificial = false; 3215 // one of None, Auto, Register, Extern, Static, PrivateExtern 3216 3217 clang::StorageClass storage = clang::SC_None; 3218 uint32_t i; 3219 for (i=0; i<num_attributes; ++i) 3220 { 3221 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3222 DWARFFormValue form_value; 3223 if (attributes.ExtractFormValueAtIndex(i, form_value)) 3224 { 3225 switch (attr) 3226 { 3227 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 3228 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 3229 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 3230 case DW_AT_name: name = form_value.AsCString(); 3231 break; 3232 case DW_AT_type: param_type_die_form = form_value; break; 3233 case DW_AT_artificial: is_artificial = form_value.Boolean(); break; 3234 case DW_AT_location: 3235 // if (form_value.BlockData()) 3236 // { 3237 // const DWARFDataExtractor& debug_info_data = debug_info(); 3238 // uint32_t block_length = form_value.Unsigned(); 3239 // DWARFDataExtractor location(debug_info_data, form_value.BlockData() - debug_info_data.GetDataStart(), block_length); 3240 // } 3241 // else 3242 // { 3243 // } 3244 // break; 3245 case DW_AT_const_value: 3246 case DW_AT_default_value: 3247 case DW_AT_description: 3248 case DW_AT_endianity: 3249 case DW_AT_is_optional: 3250 case DW_AT_segment: 3251 case DW_AT_variable_parameter: 3252 default: 3253 case DW_AT_abstract_origin: 3254 case DW_AT_sibling: 3255 break; 3256 } 3257 } 3258 } 3259 3260 bool skip = false; 3261 if (skip_artificial) 3262 { 3263 if (is_artificial) 3264 { 3265 // In order to determine if a C++ member function is 3266 // "const" we have to look at the const-ness of "this"... 3267 // Ugly, but that 3268 if (arg_idx == 0) 3269 { 3270 if (DeclKindIsCXXClass(containing_decl_ctx->getDeclKind())) 3271 { 3272 // Often times compilers omit the "this" name for the 3273 // specification DIEs, so we can't rely upon the name 3274 // being in the formal parameter DIE... 3275 if (name == NULL || ::strcmp(name, "this")==0) 3276 { 3277 Type *this_type = die.ResolveTypeUID (DIERef(param_type_die_form).GetUID()); 3278 if (this_type) 3279 { 3280 uint32_t encoding_mask = this_type->GetEncodingMask(); 3281 if (encoding_mask & Type::eEncodingIsPointerUID) 3282 { 3283 is_static = false; 3284 3285 if (encoding_mask & (1u << Type::eEncodingIsConstUID)) 3286 type_quals |= clang::Qualifiers::Const; 3287 if (encoding_mask & (1u << Type::eEncodingIsVolatileUID)) 3288 type_quals |= clang::Qualifiers::Volatile; 3289 } 3290 } 3291 } 3292 } 3293 } 3294 skip = true; 3295 } 3296 else 3297 { 3298 3299 // HACK: Objective C formal parameters "self" and "_cmd" 3300 // are not marked as artificial in the DWARF... 3301 CompileUnit *comp_unit = die.GetLLDBCompileUnit(); 3302 if (comp_unit) 3303 { 3304 switch (comp_unit->GetLanguage()) 3305 { 3306 case eLanguageTypeObjC: 3307 case eLanguageTypeObjC_plus_plus: 3308 if (name && name[0] && (strcmp (name, "self") == 0 || strcmp (name, "_cmd") == 0)) 3309 skip = true; 3310 break; 3311 default: 3312 break; 3313 } 3314 } 3315 } 3316 } 3317 3318 if (!skip) 3319 { 3320 Type *type = die.ResolveTypeUID(DIERef(param_type_die_form).GetUID()); 3321 if (type) 3322 { 3323 function_param_types.push_back (type->GetForwardCompilerType ()); 3324 3325 clang::ParmVarDecl *param_var_decl = m_ast.CreateParameterDeclaration (name, 3326 type->GetForwardCompilerType (), 3327 storage); 3328 assert(param_var_decl); 3329 function_param_decls.push_back(param_var_decl); 3330 3331 m_ast.SetMetadataAsUserID (param_var_decl, die.GetID()); 3332 } 3333 } 3334 } 3335 arg_idx++; 3336 } 3337 break; 3338 3339 case DW_TAG_unspecified_parameters: 3340 is_variadic = true; 3341 break; 3342 3343 case DW_TAG_template_type_parameter: 3344 case DW_TAG_template_value_parameter: 3345 // The one caller of this was never using the template_param_infos, 3346 // and the local variable was taking up a large amount of stack space 3347 // in SymbolFileDWARF::ParseType() so this was removed. If we ever need 3348 // the template params back, we can add them back. 3349 // ParseTemplateDIE (dwarf_cu, die, template_param_infos); 3350 break; 3351 3352 default: 3353 break; 3354 } 3355 } 3356 return arg_idx; 3357 } 3358 3359 void 3360 DWARFASTParserClang::ParseChildArrayInfo (const SymbolContext& sc, 3361 const DWARFDIE &parent_die, 3362 int64_t& first_index, 3363 std::vector<uint64_t>& element_orders, 3364 uint32_t& byte_stride, 3365 uint32_t& bit_stride) 3366 { 3367 if (!parent_die) 3368 return; 3369 3370 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); die = die.GetSibling()) 3371 { 3372 const dw_tag_t tag = die.Tag(); 3373 switch (tag) 3374 { 3375 case DW_TAG_subrange_type: 3376 { 3377 DWARFAttributes attributes; 3378 const size_t num_child_attributes = die.GetAttributes(attributes); 3379 if (num_child_attributes > 0) 3380 { 3381 uint64_t num_elements = 0; 3382 uint64_t lower_bound = 0; 3383 uint64_t upper_bound = 0; 3384 bool upper_bound_valid = false; 3385 uint32_t i; 3386 for (i=0; i<num_child_attributes; ++i) 3387 { 3388 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3389 DWARFFormValue form_value; 3390 if (attributes.ExtractFormValueAtIndex(i, form_value)) 3391 { 3392 switch (attr) 3393 { 3394 case DW_AT_name: 3395 break; 3396 3397 case DW_AT_count: 3398 num_elements = form_value.Unsigned(); 3399 break; 3400 3401 case DW_AT_bit_stride: 3402 bit_stride = form_value.Unsigned(); 3403 break; 3404 3405 case DW_AT_byte_stride: 3406 byte_stride = form_value.Unsigned(); 3407 break; 3408 3409 case DW_AT_lower_bound: 3410 lower_bound = form_value.Unsigned(); 3411 break; 3412 3413 case DW_AT_upper_bound: 3414 upper_bound_valid = true; 3415 upper_bound = form_value.Unsigned(); 3416 break; 3417 3418 default: 3419 case DW_AT_abstract_origin: 3420 case DW_AT_accessibility: 3421 case DW_AT_allocated: 3422 case DW_AT_associated: 3423 case DW_AT_data_location: 3424 case DW_AT_declaration: 3425 case DW_AT_description: 3426 case DW_AT_sibling: 3427 case DW_AT_threads_scaled: 3428 case DW_AT_type: 3429 case DW_AT_visibility: 3430 break; 3431 } 3432 } 3433 } 3434 3435 if (num_elements == 0) 3436 { 3437 if (upper_bound_valid && upper_bound >= lower_bound) 3438 num_elements = upper_bound - lower_bound + 1; 3439 } 3440 3441 element_orders.push_back (num_elements); 3442 } 3443 } 3444 break; 3445 } 3446 } 3447 } 3448 3449 Type * 3450 DWARFASTParserClang::GetTypeForDIE (const DWARFDIE &die) 3451 { 3452 if (die) 3453 { 3454 SymbolFileDWARF *dwarf = die.GetDWARF(); 3455 DWARFAttributes attributes; 3456 const size_t num_attributes = die.GetAttributes(attributes); 3457 if (num_attributes > 0) 3458 { 3459 DWARFFormValue type_die_form; 3460 for (size_t i = 0; i < num_attributes; ++i) 3461 { 3462 dw_attr_t attr = attributes.AttributeAtIndex(i); 3463 DWARFFormValue form_value; 3464 3465 if (attr == DW_AT_type && attributes.ExtractFormValueAtIndex(i, form_value)) 3466 return dwarf->ResolveTypeUID(DIERef(form_value).GetUID()); 3467 } 3468 } 3469 } 3470 3471 return nullptr; 3472 } 3473 3474 clang::Decl * 3475 DWARFASTParserClang::GetClangDeclForDIE (const DWARFDIE &die) 3476 { 3477 if (!die) 3478 return nullptr; 3479 3480 switch (die.Tag()) 3481 { 3482 case DW_TAG_variable: 3483 case DW_TAG_constant: 3484 case DW_TAG_formal_parameter: 3485 case DW_TAG_imported_declaration: 3486 case DW_TAG_imported_module: 3487 break; 3488 default: 3489 return nullptr; 3490 } 3491 3492 DIEToDeclMap::iterator cache_pos = m_die_to_decl.find(die.GetDIE()); 3493 if (cache_pos != m_die_to_decl.end()) 3494 return cache_pos->second; 3495 3496 if (DWARFDIE spec_die = die.GetReferencedDIE(DW_AT_specification)) 3497 { 3498 clang::Decl *decl = GetClangDeclForDIE(spec_die); 3499 m_die_to_decl[die.GetDIE()] = decl; 3500 m_decl_to_die[decl].insert(die.GetDIE()); 3501 return decl; 3502 } 3503 3504 clang::Decl *decl = nullptr; 3505 switch (die.Tag()) 3506 { 3507 case DW_TAG_variable: 3508 case DW_TAG_constant: 3509 case DW_TAG_formal_parameter: 3510 { 3511 SymbolFileDWARF *dwarf = die.GetDWARF(); 3512 Type *type = GetTypeForDIE(die); 3513 const char *name = die.GetName(); 3514 clang::DeclContext *decl_context = ClangASTContext::DeclContextGetAsDeclContext(dwarf->GetDeclContextContainingUID(die.GetID())); 3515 decl = m_ast.CreateVariableDeclaration( 3516 decl_context, 3517 name, 3518 ClangASTContext::GetQualType(type->GetForwardCompilerType())); 3519 break; 3520 } 3521 case DW_TAG_imported_declaration: 3522 { 3523 SymbolFileDWARF *dwarf = die.GetDWARF(); 3524 lldb::user_id_t imported_uid = die.GetAttributeValueAsReference(DW_AT_import, DW_INVALID_OFFSET); 3525 3526 if (dwarf->UserIDMatches(imported_uid)) 3527 { 3528 CompilerDecl imported_decl = dwarf->GetDeclForUID(imported_uid); 3529 if (imported_decl) 3530 { 3531 clang::DeclContext *decl_context = ClangASTContext::DeclContextGetAsDeclContext(dwarf->GetDeclContextContainingUID(die.GetID())); 3532 if (clang::NamedDecl *clang_imported_decl = llvm::dyn_cast<clang::NamedDecl>((clang::Decl *)imported_decl.GetOpaqueDecl())) 3533 decl = m_ast.CreateUsingDeclaration(decl_context, clang_imported_decl); 3534 } 3535 } 3536 break; 3537 } 3538 case DW_TAG_imported_module: 3539 { 3540 SymbolFileDWARF *dwarf = die.GetDWARF(); 3541 lldb::user_id_t imported_uid = die.GetAttributeValueAsReference(DW_AT_import, DW_INVALID_OFFSET); 3542 3543 if (dwarf->UserIDMatches(imported_uid)) 3544 { 3545 CompilerDeclContext imported_decl = dwarf->GetDeclContextForUID(imported_uid); 3546 if (imported_decl) 3547 { 3548 clang::DeclContext *decl_context = ClangASTContext::DeclContextGetAsDeclContext(dwarf->GetDeclContextContainingUID(die.GetID())); 3549 if (clang::NamespaceDecl *ns_decl = ClangASTContext::DeclContextGetAsNamespaceDecl(imported_decl)) 3550 decl = m_ast.CreateUsingDirectiveDeclaration(decl_context, ns_decl); 3551 } 3552 } 3553 break; 3554 } 3555 default: 3556 break; 3557 } 3558 3559 m_die_to_decl[die.GetDIE()] = decl; 3560 m_decl_to_die[decl].insert(die.GetDIE()); 3561 3562 return decl; 3563 } 3564 3565 clang::DeclContext * 3566 DWARFASTParserClang::GetClangDeclContextForDIE (const DWARFDIE &die) 3567 { 3568 if (die) 3569 { 3570 clang::DeclContext *decl_ctx = GetCachedClangDeclContextForDIE (die); 3571 if (decl_ctx) 3572 return decl_ctx; 3573 3574 bool try_parsing_type = true; 3575 switch (die.Tag()) 3576 { 3577 case DW_TAG_compile_unit: 3578 decl_ctx = m_ast.GetTranslationUnitDecl(); 3579 try_parsing_type = false; 3580 break; 3581 3582 case DW_TAG_namespace: 3583 decl_ctx = ResolveNamespaceDIE (die); 3584 try_parsing_type = false; 3585 break; 3586 3587 case DW_TAG_lexical_block: 3588 decl_ctx = (clang::DeclContext *)ResolveBlockDIE(die); 3589 try_parsing_type = false; 3590 break; 3591 3592 default: 3593 break; 3594 } 3595 3596 if (decl_ctx == nullptr && try_parsing_type) 3597 { 3598 Type* type = die.GetDWARF()->ResolveType (die); 3599 if (type) 3600 decl_ctx = GetCachedClangDeclContextForDIE (die); 3601 } 3602 3603 if (decl_ctx) 3604 { 3605 LinkDeclContextToDIE (decl_ctx, die); 3606 return decl_ctx; 3607 } 3608 } 3609 return nullptr; 3610 } 3611 3612 clang::BlockDecl * 3613 DWARFASTParserClang::ResolveBlockDIE (const DWARFDIE &die) 3614 { 3615 if (die && die.Tag() == DW_TAG_lexical_block) 3616 { 3617 clang::BlockDecl *decl = llvm::cast_or_null<clang::BlockDecl>(m_die_to_decl_ctx[die.GetDIE()]); 3618 3619 if (!decl) 3620 { 3621 DWARFDIE decl_context_die; 3622 clang::DeclContext *decl_context = GetClangDeclContextContainingDIE(die, &decl_context_die); 3623 decl = m_ast.CreateBlockDeclaration(decl_context); 3624 3625 if (decl) 3626 LinkDeclContextToDIE((clang::DeclContext *)decl, die); 3627 } 3628 3629 return decl; 3630 } 3631 return nullptr; 3632 } 3633 3634 clang::NamespaceDecl * 3635 DWARFASTParserClang::ResolveNamespaceDIE (const DWARFDIE &die) 3636 { 3637 if (die && die.Tag() == DW_TAG_namespace) 3638 { 3639 // See if we already parsed this namespace DIE and associated it with a 3640 // uniqued namespace declaration 3641 clang::NamespaceDecl *namespace_decl = static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die.GetDIE()]); 3642 if (namespace_decl) 3643 return namespace_decl; 3644 else 3645 { 3646 const char *namespace_name = die.GetName(); 3647 clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (die, nullptr); 3648 namespace_decl = m_ast.GetUniqueNamespaceDeclaration (namespace_name, containing_decl_ctx); 3649 Log *log = nullptr;// (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 3650 if (log) 3651 { 3652 SymbolFileDWARF *dwarf = die.GetDWARF(); 3653 if (namespace_name) 3654 { 3655 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 3656 "ASTContext => %p: 0x%8.8" PRIx64 ": DW_TAG_namespace with DW_AT_name(\"%s\") => clang::NamespaceDecl *%p (original = %p)", 3657 static_cast<void*>(m_ast.getASTContext()), 3658 die.GetID(), 3659 namespace_name, 3660 static_cast<void*>(namespace_decl), 3661 static_cast<void*>(namespace_decl->getOriginalNamespace())); 3662 } 3663 else 3664 { 3665 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 3666 "ASTContext => %p: 0x%8.8" PRIx64 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p (original = %p)", 3667 static_cast<void*>(m_ast.getASTContext()), 3668 die.GetID(), 3669 static_cast<void*>(namespace_decl), 3670 static_cast<void*>(namespace_decl->getOriginalNamespace())); 3671 } 3672 } 3673 3674 if (namespace_decl) 3675 LinkDeclContextToDIE((clang::DeclContext*)namespace_decl, die); 3676 return namespace_decl; 3677 } 3678 } 3679 return nullptr; 3680 } 3681 3682 clang::DeclContext * 3683 DWARFASTParserClang::GetClangDeclContextContainingDIE (const DWARFDIE &die, 3684 DWARFDIE *decl_ctx_die_copy) 3685 { 3686 SymbolFileDWARF *dwarf = die.GetDWARF(); 3687 3688 DWARFDIE decl_ctx_die = dwarf->GetDeclContextDIEContainingDIE (die); 3689 3690 if (decl_ctx_die_copy) 3691 *decl_ctx_die_copy = decl_ctx_die; 3692 3693 if (decl_ctx_die) 3694 { 3695 clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE (decl_ctx_die); 3696 if (clang_decl_ctx) 3697 return clang_decl_ctx; 3698 } 3699 return m_ast.GetTranslationUnitDecl(); 3700 } 3701 3702 clang::DeclContext * 3703 DWARFASTParserClang::GetCachedClangDeclContextForDIE (const DWARFDIE &die) 3704 { 3705 if (die) 3706 { 3707 DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find(die.GetDIE()); 3708 if (pos != m_die_to_decl_ctx.end()) 3709 return pos->second; 3710 } 3711 return nullptr; 3712 } 3713 3714 void 3715 DWARFASTParserClang::LinkDeclContextToDIE (clang::DeclContext *decl_ctx, const DWARFDIE &die) 3716 { 3717 m_die_to_decl_ctx[die.GetDIE()] = decl_ctx; 3718 // There can be many DIEs for a single decl context 3719 //m_decl_ctx_to_die[decl_ctx].insert(die.GetDIE()); 3720 m_decl_ctx_to_die.insert(std::make_pair(decl_ctx, die)); 3721 } 3722 3723 bool 3724 DWARFASTParserClang::CopyUniqueClassMethodTypes (const DWARFDIE &src_class_die, 3725 const DWARFDIE &dst_class_die, 3726 lldb_private::Type *class_type, 3727 DWARFDIECollection &failures) 3728 { 3729 if (!class_type || !src_class_die || !dst_class_die) 3730 return false; 3731 if (src_class_die.Tag() != dst_class_die.Tag()) 3732 return false; 3733 3734 // We need to complete the class type so we can get all of the method types 3735 // parsed so we can then unique those types to their equivalent counterparts 3736 // in "dst_cu" and "dst_class_die" 3737 class_type->GetFullCompilerType (); 3738 3739 DWARFDIE src_die; 3740 DWARFDIE dst_die; 3741 UniqueCStringMap<DWARFDIE> src_name_to_die; 3742 UniqueCStringMap<DWARFDIE> dst_name_to_die; 3743 UniqueCStringMap<DWARFDIE> src_name_to_die_artificial; 3744 UniqueCStringMap<DWARFDIE> dst_name_to_die_artificial; 3745 for (src_die = src_class_die.GetFirstChild(); src_die.IsValid(); src_die = src_die.GetSibling()) 3746 { 3747 if (src_die.Tag() == DW_TAG_subprogram) 3748 { 3749 // Make sure this is a declaration and not a concrete instance by looking 3750 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3751 // are placed inside the class definitions and shouldn't be included in 3752 // the list of things are are tracking here. 3753 if (src_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) 3754 { 3755 const char *src_name = src_die.GetMangledName (); 3756 if (src_name) 3757 { 3758 ConstString src_const_name(src_name); 3759 if (src_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3760 src_name_to_die_artificial.Append(src_const_name.GetCString(), src_die); 3761 else 3762 src_name_to_die.Append(src_const_name.GetCString(), src_die); 3763 } 3764 } 3765 } 3766 } 3767 for (dst_die = dst_class_die.GetFirstChild(); dst_die.IsValid(); dst_die = dst_die.GetSibling()) 3768 { 3769 if (dst_die.Tag() == DW_TAG_subprogram) 3770 { 3771 // Make sure this is a declaration and not a concrete instance by looking 3772 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3773 // are placed inside the class definitions and shouldn't be included in 3774 // the list of things are are tracking here. 3775 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) 3776 { 3777 const char *dst_name = dst_die.GetMangledName (); 3778 if (dst_name) 3779 { 3780 ConstString dst_const_name(dst_name); 3781 if ( dst_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3782 dst_name_to_die_artificial.Append(dst_const_name.GetCString(), dst_die); 3783 else 3784 dst_name_to_die.Append(dst_const_name.GetCString(), dst_die); 3785 } 3786 } 3787 } 3788 } 3789 const uint32_t src_size = src_name_to_die.GetSize (); 3790 const uint32_t dst_size = dst_name_to_die.GetSize (); 3791 Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | DWARF_LOG_TYPE_COMPLETION)); 3792 3793 // Is everything kosher so we can go through the members at top speed? 3794 bool fast_path = true; 3795 3796 if (src_size != dst_size) 3797 { 3798 if (src_size != 0 && dst_size != 0) 3799 { 3800 if (log) 3801 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)", 3802 src_class_die.GetOffset(), 3803 dst_class_die.GetOffset(), 3804 src_size, 3805 dst_size); 3806 } 3807 3808 fast_path = false; 3809 } 3810 3811 uint32_t idx; 3812 3813 if (fast_path) 3814 { 3815 for (idx = 0; idx < src_size; ++idx) 3816 { 3817 src_die = src_name_to_die.GetValueAtIndexUnchecked (idx); 3818 dst_die = dst_name_to_die.GetValueAtIndexUnchecked (idx); 3819 3820 if (src_die.Tag() != dst_die.Tag()) 3821 { 3822 if (log) 3823 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)", 3824 src_class_die.GetOffset(), 3825 dst_class_die.GetOffset(), 3826 src_die.GetOffset(), 3827 src_die.GetTagAsCString(), 3828 dst_die.GetOffset(), 3829 dst_die.GetTagAsCString()); 3830 fast_path = false; 3831 } 3832 3833 const char *src_name = src_die.GetMangledName (); 3834 const char *dst_name = dst_die.GetMangledName (); 3835 3836 // Make sure the names match 3837 if (src_name == dst_name || (strcmp (src_name, dst_name) == 0)) 3838 continue; 3839 3840 if (log) 3841 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)", 3842 src_class_die.GetOffset(), 3843 dst_class_die.GetOffset(), 3844 src_die.GetOffset(), 3845 src_name, 3846 dst_die.GetOffset(), 3847 dst_name); 3848 3849 fast_path = false; 3850 } 3851 } 3852 3853 DWARFASTParserClang *src_dwarf_ast_parser = (DWARFASTParserClang *)src_die.GetDWARFParser(); 3854 DWARFASTParserClang *dst_dwarf_ast_parser = (DWARFASTParserClang *)dst_die.GetDWARFParser(); 3855 3856 // Now do the work of linking the DeclContexts and Types. 3857 if (fast_path) 3858 { 3859 // We can do this quickly. Just run across the tables index-for-index since 3860 // we know each node has matching names and tags. 3861 for (idx = 0; idx < src_size; ++idx) 3862 { 3863 src_die = src_name_to_die.GetValueAtIndexUnchecked (idx); 3864 dst_die = dst_name_to_die.GetValueAtIndexUnchecked (idx); 3865 3866 clang::DeclContext *src_decl_ctx = src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3867 if (src_decl_ctx) 3868 { 3869 if (log) 3870 log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3871 static_cast<void*>(src_decl_ctx), 3872 src_die.GetOffset(), dst_die.GetOffset()); 3873 dst_dwarf_ast_parser->LinkDeclContextToDIE (src_decl_ctx, dst_die); 3874 } 3875 else 3876 { 3877 if (log) 3878 log->Printf ("warning: tried to unique decl context from 0x%8.8x for 0x%8.8x, but none was found", 3879 src_die.GetOffset(), dst_die.GetOffset()); 3880 } 3881 3882 Type *src_child_type = dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3883 if (src_child_type) 3884 { 3885 if (log) 3886 log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 3887 static_cast<void*>(src_child_type), 3888 src_child_type->GetID(), 3889 src_die.GetOffset(), dst_die.GetOffset()); 3890 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 3891 } 3892 else 3893 { 3894 if (log) 3895 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()); 3896 } 3897 } 3898 } 3899 else 3900 { 3901 // We must do this slowly. For each member of the destination, look 3902 // up a member in the source with the same name, check its tag, and 3903 // unique them if everything matches up. Report failures. 3904 3905 if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty()) 3906 { 3907 src_name_to_die.Sort(); 3908 3909 for (idx = 0; idx < dst_size; ++idx) 3910 { 3911 const char *dst_name = dst_name_to_die.GetCStringAtIndex(idx); 3912 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3913 src_die = src_name_to_die.Find(dst_name, DWARFDIE()); 3914 3915 if (src_die && (src_die.Tag() == dst_die.Tag())) 3916 { 3917 clang::DeclContext *src_decl_ctx = src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3918 if (src_decl_ctx) 3919 { 3920 if (log) 3921 log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3922 static_cast<void*>(src_decl_ctx), 3923 src_die.GetOffset(), 3924 dst_die.GetOffset()); 3925 dst_dwarf_ast_parser->LinkDeclContextToDIE (src_decl_ctx, dst_die); 3926 } 3927 else 3928 { 3929 if (log) 3930 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()); 3931 } 3932 3933 Type *src_child_type = dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3934 if (src_child_type) 3935 { 3936 if (log) 3937 log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 3938 static_cast<void*>(src_child_type), 3939 src_child_type->GetID(), 3940 src_die.GetOffset(), 3941 dst_die.GetOffset()); 3942 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 3943 } 3944 else 3945 { 3946 if (log) 3947 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()); 3948 } 3949 } 3950 else 3951 { 3952 if (log) 3953 log->Printf ("warning: couldn't find a match for 0x%8.8x", dst_die.GetOffset()); 3954 3955 failures.Append(dst_die); 3956 } 3957 } 3958 } 3959 } 3960 3961 const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize (); 3962 const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize (); 3963 3964 if (src_size_artificial && dst_size_artificial) 3965 { 3966 dst_name_to_die_artificial.Sort(); 3967 3968 for (idx = 0; idx < src_size_artificial; ++idx) 3969 { 3970 const char *src_name_artificial = src_name_to_die_artificial.GetCStringAtIndex(idx); 3971 src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked (idx); 3972 dst_die = dst_name_to_die_artificial.Find(src_name_artificial, DWARFDIE()); 3973 3974 if (dst_die) 3975 { 3976 // Both classes have the artificial types, link them 3977 clang::DeclContext *src_decl_ctx = src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3978 if (src_decl_ctx) 3979 { 3980 if (log) 3981 log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3982 static_cast<void*>(src_decl_ctx), 3983 src_die.GetOffset(), dst_die.GetOffset()); 3984 dst_dwarf_ast_parser->LinkDeclContextToDIE (src_decl_ctx, dst_die); 3985 } 3986 else 3987 { 3988 if (log) 3989 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()); 3990 } 3991 3992 Type *src_child_type = dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3993 if (src_child_type) 3994 { 3995 if (log) 3996 log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 3997 static_cast<void*>(src_child_type), 3998 src_child_type->GetID(), 3999 src_die.GetOffset(), dst_die.GetOffset()); 4000 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 4001 } 4002 else 4003 { 4004 if (log) 4005 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()); 4006 } 4007 } 4008 } 4009 } 4010 4011 if (dst_size_artificial) 4012 { 4013 for (idx = 0; idx < dst_size_artificial; ++idx) 4014 { 4015 const char *dst_name_artificial = dst_name_to_die_artificial.GetCStringAtIndex(idx); 4016 dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked (idx); 4017 if (log) 4018 log->Printf ("warning: need to create artificial method for 0x%8.8x for method '%s'", dst_die.GetOffset(), dst_name_artificial); 4019 4020 failures.Append(dst_die); 4021 } 4022 } 4023 4024 return (failures.Size() != 0); 4025 } 4026 4027 4028 bool 4029 DWARFASTParserClang::LayoutRecordType(const clang::RecordDecl *record_decl, 4030 uint64_t &bit_size, 4031 uint64_t &alignment, 4032 llvm::DenseMap<const clang::FieldDecl *, uint64_t> &field_offsets, 4033 llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits> &base_offsets, 4034 llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits> &vbase_offsets) 4035 { 4036 RecordDeclToLayoutMap::iterator pos = m_record_decl_to_layout_map.find (record_decl); 4037 bool success = false; 4038 base_offsets.clear(); 4039 vbase_offsets.clear(); 4040 if (pos != m_record_decl_to_layout_map.end()) 4041 { 4042 bit_size = pos->second.bit_size; 4043 alignment = pos->second.alignment; 4044 field_offsets.swap(pos->second.field_offsets); 4045 base_offsets.swap (pos->second.base_offsets); 4046 vbase_offsets.swap (pos->second.vbase_offsets); 4047 m_record_decl_to_layout_map.erase(pos); 4048 success = true; 4049 } 4050 else 4051 { 4052 bit_size = 0; 4053 alignment = 0; 4054 field_offsets.clear(); 4055 } 4056 return success; 4057 } 4058