1 //===-- DWARFASTParserClang.cpp ---------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "DWARFASTParserClang.h" 11 #include "DWARFCompileUnit.h" 12 #include "DWARFDebugInfo.h" 13 #include "DWARFDeclContext.h" 14 #include "DWARFDefines.h" 15 #include "DWARFDIE.h" 16 #include "DWARFDIECollection.h" 17 #include "SymbolFileDWARF.h" 18 #include "SymbolFileDWARFDebugMap.h" 19 #include "UniqueDWARFASTType.h" 20 21 #include "Plugins/Language/ObjC/ObjCLanguage.h" 22 #include "lldb/Core/Log.h" 23 #include "lldb/Core/Module.h" 24 #include "lldb/Core/StreamString.h" 25 #include "lldb/Core/Value.h" 26 #include "lldb/Host/Host.h" 27 #include "lldb/Interpreter/Args.h" 28 #include "lldb/Symbol/ClangASTImporter.h" 29 #include "lldb/Symbol/ClangExternalASTSourceCommon.h" 30 #include "lldb/Symbol/ClangUtil.h" 31 #include "lldb/Symbol/CompileUnit.h" 32 #include "lldb/Symbol/Function.h" 33 #include "lldb/Symbol/ObjectFile.h" 34 #include "lldb/Symbol/SymbolVendor.h" 35 #include "lldb/Symbol/TypeList.h" 36 #include "lldb/Symbol/TypeMap.h" 37 #include "lldb/Target/Language.h" 38 #include "lldb/Utility/LLDBAssert.h" 39 40 #include "clang/AST/DeclCXX.h" 41 #include "clang/AST/DeclObjC.h" 42 43 #include <map> 44 #include <vector> 45 46 //#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN 47 48 #ifdef ENABLE_DEBUG_PRINTF 49 #include <stdio.h> 50 #define DEBUG_PRINTF(fmt, ...) printf(fmt, __VA_ARGS__) 51 #else 52 #define DEBUG_PRINTF(fmt, ...) 53 #endif 54 55 56 using namespace lldb; 57 using namespace lldb_private; 58 DWARFASTParserClang::DWARFASTParserClang (ClangASTContext &ast) : 59 m_ast (ast), 60 m_die_to_decl_ctx (), 61 m_decl_ctx_to_die () 62 { 63 } 64 65 DWARFASTParserClang::~DWARFASTParserClang () 66 { 67 } 68 69 70 static AccessType 71 DW_ACCESS_to_AccessType (uint32_t dwarf_accessibility) 72 { 73 switch (dwarf_accessibility) 74 { 75 case DW_ACCESS_public: return eAccessPublic; 76 case DW_ACCESS_private: return eAccessPrivate; 77 case DW_ACCESS_protected: return eAccessProtected; 78 default: break; 79 } 80 return eAccessNone; 81 } 82 83 static bool 84 DeclKindIsCXXClass (clang::Decl::Kind decl_kind) 85 { 86 switch (decl_kind) 87 { 88 case clang::Decl::CXXRecord: 89 case clang::Decl::ClassTemplateSpecialization: 90 return true; 91 default: 92 break; 93 } 94 return false; 95 } 96 97 struct BitfieldInfo 98 { 99 uint64_t bit_size; 100 uint64_t bit_offset; 101 102 BitfieldInfo () : 103 bit_size (LLDB_INVALID_ADDRESS), 104 bit_offset (LLDB_INVALID_ADDRESS) 105 { 106 } 107 108 void 109 Clear() 110 { 111 bit_size = LLDB_INVALID_ADDRESS; 112 bit_offset = LLDB_INVALID_ADDRESS; 113 } 114 115 bool IsValid () 116 { 117 return (bit_size != LLDB_INVALID_ADDRESS) && 118 (bit_offset != LLDB_INVALID_ADDRESS); 119 } 120 }; 121 122 123 ClangASTImporter & 124 DWARFASTParserClang::GetClangASTImporter() 125 { 126 if (!m_clang_ast_importer_ap) 127 { 128 m_clang_ast_importer_ap.reset (new ClangASTImporter); 129 } 130 return *m_clang_ast_importer_ap; 131 } 132 133 134 TypeSP 135 DWARFASTParserClang::ParseTypeFromDWO (const DWARFDIE &die, Log *log) 136 { 137 ModuleSP dwo_module_sp = die.GetContainingDWOModule(); 138 if (dwo_module_sp) 139 { 140 // This type comes from an external DWO module 141 std::vector<CompilerContext> dwo_context; 142 die.GetDWOContext(dwo_context); 143 TypeMap dwo_types; 144 if (dwo_module_sp->GetSymbolVendor()->FindTypes(dwo_context, true, dwo_types)) 145 { 146 const size_t num_dwo_types = dwo_types.GetSize(); 147 if (num_dwo_types == 1) 148 { 149 // We found a real definition for this type elsewhere 150 // so lets use it and cache the fact that we found 151 // a complete type for this die 152 TypeSP dwo_type_sp = dwo_types.GetTypeAtIndex(0); 153 if (dwo_type_sp) 154 { 155 lldb_private::CompilerType dwo_type = dwo_type_sp->GetForwardCompilerType(); 156 157 lldb_private::CompilerType type = GetClangASTImporter().CopyType (m_ast, dwo_type); 158 159 //printf ("copied_qual_type: ast = %p, clang_type = %p, name = '%s'\n", m_ast, copied_qual_type.getAsOpaquePtr(), external_type->GetName().GetCString()); 160 if (type) 161 { 162 SymbolFileDWARF *dwarf = die.GetDWARF(); 163 TypeSP type_sp (new Type (die.GetID(), 164 dwarf, 165 dwo_type_sp->GetName(), 166 dwo_type_sp->GetByteSize(), 167 NULL, 168 LLDB_INVALID_UID, 169 Type::eEncodingInvalid, 170 &dwo_type_sp->GetDeclaration(), 171 type, 172 Type::eResolveStateForward)); 173 174 dwarf->GetTypeList()->Insert(type_sp); 175 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 176 clang::TagDecl *tag_decl = ClangASTContext::GetAsTagDecl(type); 177 if (tag_decl) 178 LinkDeclContextToDIE(tag_decl, die); 179 else 180 { 181 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE(die); 182 if (defn_decl_ctx) 183 LinkDeclContextToDIE(defn_decl_ctx, die); 184 } 185 return type_sp; 186 } 187 } 188 } 189 } 190 } 191 return TypeSP(); 192 } 193 194 TypeSP 195 DWARFASTParserClang::ParseTypeFromDWARF (const SymbolContext& sc, 196 const DWARFDIE &die, 197 Log *log, 198 bool *type_is_new_ptr) 199 { 200 TypeSP type_sp; 201 202 if (type_is_new_ptr) 203 *type_is_new_ptr = false; 204 205 AccessType accessibility = eAccessNone; 206 if (die) 207 { 208 SymbolFileDWARF *dwarf = die.GetDWARF(); 209 if (log) 210 { 211 DWARFDIE context_die; 212 clang::DeclContext *context = GetClangDeclContextContainingDIE (die, &context_die); 213 214 dwarf->GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x, decl_ctx = %p (die 0x%8.8x)) %s name = '%s')", 215 die.GetOffset(), 216 static_cast<void*>(context), 217 context_die.GetOffset(), 218 die.GetTagAsCString(), 219 die.GetName()); 220 221 } 222 // 223 // Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 224 // if (log && dwarf_cu) 225 // { 226 // StreamString s; 227 // die->DumpLocation (this, dwarf_cu, s); 228 // dwarf->GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDwarf::%s %s", __FUNCTION__, s.GetData()); 229 // 230 // } 231 232 Type *type_ptr = dwarf->GetDIEToType().lookup (die.GetDIE()); 233 TypeList* type_list = dwarf->GetTypeList(); 234 if (type_ptr == NULL) 235 { 236 if (type_is_new_ptr) 237 *type_is_new_ptr = true; 238 239 const dw_tag_t tag = die.Tag(); 240 241 bool is_forward_declaration = false; 242 DWARFAttributes attributes; 243 const char *type_name_cstr = NULL; 244 ConstString type_name_const_str; 245 Type::ResolveState resolve_state = Type::eResolveStateUnresolved; 246 uint64_t byte_size = 0; 247 Declaration decl; 248 249 Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID; 250 CompilerType clang_type; 251 DWARFFormValue form_value; 252 253 dw_attr_t attr; 254 255 switch (tag) 256 { 257 case DW_TAG_typedef: 258 // Try to parse a typedef from the DWO file first as modules 259 // can contain typedef'ed structures that have no names like: 260 // 261 // typedef struct { int a; } Foo; 262 // 263 // In this case we will have a structure with no name and a 264 // typedef named "Foo" that points to this unnamed structure. 265 // The name in the typedef is the only identifier for the struct, 266 // so always try to get typedefs from DWO files if possible. 267 // 268 // The type_sp returned will be empty if the typedef doesn't exist 269 // in a DWO file, so it is cheap to call this function just to check. 270 // 271 // If we don't do this we end up creating a TypeSP that says this 272 // is a typedef to type 0x123 (the DW_AT_type value would be 0x123 273 // in the DW_TAG_typedef), and this is the unnamed structure type. 274 // We will have a hard time tracking down an unnammed structure 275 // type in the module DWO file, so we make sure we don't get into 276 // this situation by always resolving typedefs from the DWO file. 277 type_sp = ParseTypeFromDWO(die, log); 278 if (type_sp) 279 return type_sp; 280 281 LLVM_FALLTHROUGH; 282 case DW_TAG_base_type: 283 case DW_TAG_pointer_type: 284 case DW_TAG_reference_type: 285 case DW_TAG_rvalue_reference_type: 286 case DW_TAG_const_type: 287 case DW_TAG_restrict_type: 288 case DW_TAG_volatile_type: 289 case DW_TAG_unspecified_type: 290 { 291 // Set a bit that lets us know that we are currently parsing this 292 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 293 294 const size_t num_attributes = die.GetAttributes (attributes); 295 uint32_t encoding = 0; 296 DWARFFormValue encoding_uid; 297 298 if (num_attributes > 0) 299 { 300 uint32_t i; 301 for (i=0; i<num_attributes; ++i) 302 { 303 attr = attributes.AttributeAtIndex(i); 304 if (attributes.ExtractFormValueAtIndex(i, form_value)) 305 { 306 switch (attr) 307 { 308 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 309 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 310 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 311 case DW_AT_name: 312 313 type_name_cstr = form_value.AsCString(); 314 // Work around a bug in llvm-gcc where they give a name to a reference type which doesn't 315 // include the "&"... 316 if (tag == DW_TAG_reference_type) 317 { 318 if (strchr (type_name_cstr, '&') == NULL) 319 type_name_cstr = NULL; 320 } 321 if (type_name_cstr) 322 type_name_const_str.SetCString(type_name_cstr); 323 break; 324 case DW_AT_byte_size: byte_size = form_value.Unsigned(); break; 325 case DW_AT_encoding: encoding = form_value.Unsigned(); break; 326 case DW_AT_type: encoding_uid = form_value; break; 327 default: 328 case DW_AT_sibling: 329 break; 330 } 331 } 332 } 333 } 334 335 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\") type => 0x%8.8lx\n", die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr, encoding_uid.Reference()); 336 337 switch (tag) 338 { 339 default: 340 break; 341 342 case DW_TAG_unspecified_type: 343 if (strcmp(type_name_cstr, "nullptr_t") == 0 || 344 strcmp(type_name_cstr, "decltype(nullptr)") == 0 ) 345 { 346 resolve_state = Type::eResolveStateFull; 347 clang_type = m_ast.GetBasicType(eBasicTypeNullPtr); 348 break; 349 } 350 // Fall through to base type below in case we can handle the type there... 351 LLVM_FALLTHROUGH; 352 353 case DW_TAG_base_type: 354 resolve_state = Type::eResolveStateFull; 355 clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize (type_name_cstr, 356 encoding, 357 byte_size * 8); 358 break; 359 360 case DW_TAG_pointer_type: encoding_data_type = Type::eEncodingIsPointerUID; break; 361 case DW_TAG_reference_type: encoding_data_type = Type::eEncodingIsLValueReferenceUID; break; 362 case DW_TAG_rvalue_reference_type: encoding_data_type = Type::eEncodingIsRValueReferenceUID; break; 363 case DW_TAG_typedef: encoding_data_type = Type::eEncodingIsTypedefUID; break; 364 case DW_TAG_const_type: encoding_data_type = Type::eEncodingIsConstUID; break; 365 case DW_TAG_restrict_type: encoding_data_type = Type::eEncodingIsRestrictUID; break; 366 case DW_TAG_volatile_type: encoding_data_type = Type::eEncodingIsVolatileUID; break; 367 } 368 369 if (!clang_type && (encoding_data_type == Type::eEncodingIsPointerUID || encoding_data_type == Type::eEncodingIsTypedefUID) && sc.comp_unit != NULL) 370 { 371 if (tag == DW_TAG_pointer_type) 372 { 373 DWARFDIE target_die = die.GetReferencedDIE(DW_AT_type); 374 375 if (target_die.GetAttributeValueAsUnsigned(DW_AT_APPLE_block, 0)) 376 { 377 // Blocks have a __FuncPtr inside them which is a pointer to a function of the proper type. 378 379 for (DWARFDIE child_die = target_die.GetFirstChild(); 380 child_die.IsValid(); 381 child_die = child_die.GetSibling()) 382 { 383 if (!strcmp(child_die.GetAttributeValueAsString(DW_AT_name, ""), "__FuncPtr")) 384 { 385 DWARFDIE function_pointer_type = child_die.GetReferencedDIE(DW_AT_type); 386 387 if (function_pointer_type) 388 { 389 DWARFDIE function_type = function_pointer_type.GetReferencedDIE(DW_AT_type); 390 391 bool function_type_is_new_pointer; 392 TypeSP lldb_function_type_sp = ParseTypeFromDWARF(sc, function_type, log, &function_type_is_new_pointer); 393 394 if (lldb_function_type_sp) 395 { 396 clang_type = m_ast.CreateBlockPointerType(lldb_function_type_sp->GetForwardCompilerType()); 397 encoding_data_type = Type::eEncodingIsUID; 398 encoding_uid.Clear(); 399 resolve_state = Type::eResolveStateFull; 400 } 401 } 402 403 break; 404 } 405 } 406 } 407 } 408 409 bool translation_unit_is_objc = (sc.comp_unit->GetLanguage() == eLanguageTypeObjC || sc.comp_unit->GetLanguage() == eLanguageTypeObjC_plus_plus); 410 411 if (translation_unit_is_objc) 412 { 413 if (type_name_cstr != NULL) 414 { 415 static ConstString g_objc_type_name_id("id"); 416 static ConstString g_objc_type_name_Class("Class"); 417 static ConstString g_objc_type_name_selector("SEL"); 418 419 if (type_name_const_str == g_objc_type_name_id) 420 { 421 if (log) 422 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 423 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'id' built-in type.", 424 die.GetOffset(), 425 die.GetTagAsCString(), 426 die.GetName()); 427 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 428 encoding_data_type = Type::eEncodingIsUID; 429 encoding_uid.Clear(); 430 resolve_state = Type::eResolveStateFull; 431 432 } 433 else if (type_name_const_str == g_objc_type_name_Class) 434 { 435 if (log) 436 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 437 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'Class' built-in type.", 438 die.GetOffset(), 439 die.GetTagAsCString(), 440 die.GetName()); 441 clang_type = m_ast.GetBasicType(eBasicTypeObjCClass); 442 encoding_data_type = Type::eEncodingIsUID; 443 encoding_uid.Clear(); 444 resolve_state = Type::eResolveStateFull; 445 } 446 else if (type_name_const_str == g_objc_type_name_selector) 447 { 448 if (log) 449 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 450 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'selector' built-in type.", 451 die.GetOffset(), 452 die.GetTagAsCString(), 453 die.GetName()); 454 clang_type = m_ast.GetBasicType(eBasicTypeObjCSel); 455 encoding_data_type = Type::eEncodingIsUID; 456 encoding_uid.Clear(); 457 resolve_state = Type::eResolveStateFull; 458 } 459 } 460 else if (encoding_data_type == Type::eEncodingIsPointerUID && encoding_uid.IsValid()) 461 { 462 // Clang sometimes erroneously emits id as objc_object*. In that case we fix up the type to "id". 463 464 const DWARFDIE encoding_die = dwarf->GetDIE(DIERef(encoding_uid)); 465 466 if (encoding_die && encoding_die.Tag() == DW_TAG_structure_type) 467 { 468 if (const char *struct_name = encoding_die.GetName()) 469 { 470 if (!strcmp(struct_name, "objc_object")) 471 { 472 if (log) 473 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 474 "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is 'objc_object*', which we overrode to 'id'.", 475 die.GetOffset(), 476 die.GetTagAsCString(), 477 die.GetName()); 478 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 479 encoding_data_type = Type::eEncodingIsUID; 480 encoding_uid.Clear(); 481 resolve_state = Type::eResolveStateFull; 482 } 483 } 484 } 485 } 486 } 487 } 488 489 type_sp.reset( new Type (die.GetID(), 490 dwarf, 491 type_name_const_str, 492 byte_size, 493 NULL, 494 DIERef(encoding_uid).GetUID(dwarf), 495 encoding_data_type, 496 &decl, 497 clang_type, 498 resolve_state)); 499 500 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 501 502 // Type* encoding_type = GetUniquedTypeForDIEOffset(encoding_uid, type_sp, NULL, 0, 0, false); 503 // if (encoding_type != NULL) 504 // { 505 // if (encoding_type != DIE_IS_BEING_PARSED) 506 // type_sp->SetEncodingType(encoding_type); 507 // else 508 // m_indirect_fixups.push_back(type_sp.get()); 509 // } 510 } 511 break; 512 513 case DW_TAG_structure_type: 514 case DW_TAG_union_type: 515 case DW_TAG_class_type: 516 { 517 // Set a bit that lets us know that we are currently parsing this 518 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 519 bool byte_size_valid = false; 520 521 LanguageType class_language = eLanguageTypeUnknown; 522 bool is_complete_objc_class = false; 523 //bool struct_is_class = false; 524 const size_t num_attributes = die.GetAttributes (attributes); 525 if (num_attributes > 0) 526 { 527 uint32_t i; 528 for (i=0; i<num_attributes; ++i) 529 { 530 attr = attributes.AttributeAtIndex(i); 531 if (attributes.ExtractFormValueAtIndex(i, form_value)) 532 { 533 switch (attr) 534 { 535 case DW_AT_decl_file: 536 if (die.GetCU()->DW_AT_decl_file_attributes_are_invalid()) 537 { 538 // llvm-gcc outputs invalid DW_AT_decl_file attributes that always 539 // point to the compile unit file, so we clear this invalid value 540 // so that we can still unique types efficiently. 541 decl.SetFile(FileSpec ("<invalid>", false)); 542 } 543 else 544 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); 545 break; 546 547 case DW_AT_decl_line: 548 decl.SetLine(form_value.Unsigned()); 549 break; 550 551 case DW_AT_decl_column: 552 decl.SetColumn(form_value.Unsigned()); 553 break; 554 555 case DW_AT_name: 556 type_name_cstr = form_value.AsCString(); 557 type_name_const_str.SetCString(type_name_cstr); 558 break; 559 560 case DW_AT_byte_size: 561 byte_size = form_value.Unsigned(); 562 byte_size_valid = true; 563 break; 564 565 case DW_AT_accessibility: 566 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 567 break; 568 569 case DW_AT_declaration: 570 is_forward_declaration = form_value.Boolean(); 571 break; 572 573 case DW_AT_APPLE_runtime_class: 574 class_language = (LanguageType)form_value.Signed(); 575 break; 576 577 case DW_AT_APPLE_objc_complete_type: 578 is_complete_objc_class = form_value.Signed(); 579 break; 580 581 case DW_AT_allocated: 582 case DW_AT_associated: 583 case DW_AT_data_location: 584 case DW_AT_description: 585 case DW_AT_start_scope: 586 case DW_AT_visibility: 587 default: 588 case DW_AT_sibling: 589 break; 590 } 591 } 592 } 593 } 594 595 // UniqueDWARFASTType is large, so don't create a local variables on the 596 // stack, put it on the heap. This function is often called recursively 597 // and clang isn't good and sharing the stack space for variables in different blocks. 598 std::unique_ptr<UniqueDWARFASTType> unique_ast_entry_ap(new UniqueDWARFASTType()); 599 600 ConstString unique_typename(type_name_const_str); 601 Declaration unique_decl(decl); 602 603 if (type_name_const_str) 604 { 605 LanguageType die_language = die.GetLanguage(); 606 if (Language::LanguageIsCPlusPlus(die_language)) 607 { 608 // For C++, we rely solely upon the one definition rule that says only 609 // one thing can exist at a given decl context. We ignore the file and 610 // line that things are declared on. 611 std::string qualified_name; 612 if (die.GetQualifiedName(qualified_name)) 613 unique_typename = ConstString(qualified_name); 614 unique_decl.Clear(); 615 } 616 617 if (dwarf->GetUniqueDWARFASTTypeMap().Find(unique_typename, die, unique_decl, 618 byte_size_valid ? byte_size : -1, 619 *unique_ast_entry_ap)) 620 { 621 type_sp = unique_ast_entry_ap->m_type_sp; 622 if (type_sp) 623 { 624 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 625 return type_sp; 626 } 627 } 628 } 629 630 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr); 631 632 int tag_decl_kind = -1; 633 AccessType default_accessibility = eAccessNone; 634 if (tag == DW_TAG_structure_type) 635 { 636 tag_decl_kind = clang::TTK_Struct; 637 default_accessibility = eAccessPublic; 638 } 639 else if (tag == DW_TAG_union_type) 640 { 641 tag_decl_kind = clang::TTK_Union; 642 default_accessibility = eAccessPublic; 643 } 644 else if (tag == DW_TAG_class_type) 645 { 646 tag_decl_kind = clang::TTK_Class; 647 default_accessibility = eAccessPrivate; 648 } 649 650 if (byte_size_valid && byte_size == 0 && type_name_cstr && 651 die.HasChildren() == false && 652 sc.comp_unit->GetLanguage() == eLanguageTypeObjC) 653 { 654 // Work around an issue with clang at the moment where 655 // forward declarations for objective C classes are emitted 656 // as: 657 // DW_TAG_structure_type [2] 658 // DW_AT_name( "ForwardObjcClass" ) 659 // DW_AT_byte_size( 0x00 ) 660 // DW_AT_decl_file( "..." ) 661 // DW_AT_decl_line( 1 ) 662 // 663 // Note that there is no DW_AT_declaration and there are 664 // no children, and the byte size is zero. 665 is_forward_declaration = true; 666 } 667 668 if (class_language == eLanguageTypeObjC || 669 class_language == eLanguageTypeObjC_plus_plus) 670 { 671 if (!is_complete_objc_class && die.Supports_DW_AT_APPLE_objc_complete_type()) 672 { 673 // We have a valid eSymbolTypeObjCClass class symbol whose 674 // name matches the current objective C class that we 675 // are trying to find and this DIE isn't the complete 676 // definition (we checked is_complete_objc_class above and 677 // know it is false), so the real definition is in here somewhere 678 type_sp = dwarf->FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true); 679 680 if (!type_sp) 681 { 682 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 683 if (debug_map_symfile) 684 { 685 // We weren't able to find a full declaration in 686 // this DWARF, see if we have a declaration anywhere 687 // else... 688 type_sp = debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true); 689 } 690 } 691 692 if (type_sp) 693 { 694 if (log) 695 { 696 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 697 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is an incomplete objc type, complete type is 0x%8.8" PRIx64, 698 static_cast<void*>(this), 699 die.GetOffset(), 700 DW_TAG_value_to_name(tag), 701 type_name_cstr, 702 type_sp->GetID()); 703 } 704 705 // We found a real definition for this type elsewhere 706 // so lets use it and cache the fact that we found 707 // a complete type for this die 708 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 709 return type_sp; 710 } 711 } 712 } 713 714 715 if (is_forward_declaration) 716 { 717 // We have a forward declaration to a type and we need 718 // to try and find a full declaration. We look in the 719 // current type index just in case we have a forward 720 // declaration followed by an actual declarations in the 721 // DWARF. If this fails, we need to look elsewhere... 722 if (log) 723 { 724 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 725 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, trying to find complete type", 726 static_cast<void*>(this), 727 die.GetOffset(), 728 DW_TAG_value_to_name(tag), 729 type_name_cstr); 730 } 731 732 // See if the type comes from a DWO module and if so, track down that type. 733 type_sp = ParseTypeFromDWO(die, log); 734 if (type_sp) 735 return type_sp; 736 737 DWARFDeclContext die_decl_ctx; 738 die.GetDWARFDeclContext(die_decl_ctx); 739 740 //type_sp = FindDefinitionTypeForDIE (dwarf_cu, die, type_name_const_str); 741 type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx); 742 743 if (!type_sp) 744 { 745 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 746 if (debug_map_symfile) 747 { 748 // We weren't able to find a full declaration in 749 // this DWARF, see if we have a declaration anywhere 750 // else... 751 type_sp = debug_map_symfile->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx); 752 } 753 } 754 755 if (type_sp) 756 { 757 if (log) 758 { 759 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 760 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, complete type is 0x%8.8" PRIx64, 761 static_cast<void*>(this), 762 die.GetOffset(), 763 DW_TAG_value_to_name(tag), 764 type_name_cstr, 765 type_sp->GetID()); 766 } 767 768 // We found a real definition for this type elsewhere 769 // so lets use it and cache the fact that we found 770 // a complete type for this die 771 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 772 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE( 773 dwarf->DebugInfo()->GetDIE(DIERef(type_sp->GetID(), dwarf))); 774 if (defn_decl_ctx) 775 LinkDeclContextToDIE(defn_decl_ctx, die); 776 return type_sp; 777 } 778 } 779 assert (tag_decl_kind != -1); 780 bool clang_type_was_created = false; 781 clang_type.SetCompilerType(&m_ast, dwarf->GetForwardDeclDieToClangType().lookup (die.GetDIE())); 782 if (!clang_type) 783 { 784 clang::DeclContext *decl_ctx = GetClangDeclContextContainingDIE (die, nullptr); 785 if (accessibility == eAccessNone && decl_ctx) 786 { 787 // Check the decl context that contains this class/struct/union. 788 // If it is a class we must give it an accessibility. 789 const clang::Decl::Kind containing_decl_kind = decl_ctx->getDeclKind(); 790 if (DeclKindIsCXXClass (containing_decl_kind)) 791 accessibility = default_accessibility; 792 } 793 794 ClangASTMetadata metadata; 795 metadata.SetUserID(die.GetID()); 796 metadata.SetIsDynamicCXXType(dwarf->ClassOrStructIsVirtual (die)); 797 798 if (type_name_cstr && strchr (type_name_cstr, '<')) 799 { 800 ClangASTContext::TemplateParameterInfos template_param_infos; 801 if (ParseTemplateParameterInfos (die, template_param_infos)) 802 { 803 clang::ClassTemplateDecl *class_template_decl = m_ast.ParseClassTemplateDecl (decl_ctx, 804 accessibility, 805 type_name_cstr, 806 tag_decl_kind, 807 template_param_infos); 808 809 clang::ClassTemplateSpecializationDecl *class_specialization_decl = m_ast.CreateClassTemplateSpecializationDecl (decl_ctx, 810 class_template_decl, 811 tag_decl_kind, 812 template_param_infos); 813 clang_type = m_ast.CreateClassTemplateSpecializationType (class_specialization_decl); 814 clang_type_was_created = true; 815 816 m_ast.SetMetadata (class_template_decl, metadata); 817 m_ast.SetMetadata (class_specialization_decl, metadata); 818 } 819 } 820 821 if (!clang_type_was_created) 822 { 823 clang_type_was_created = true; 824 clang_type = m_ast.CreateRecordType (decl_ctx, 825 accessibility, 826 type_name_cstr, 827 tag_decl_kind, 828 class_language, 829 &metadata); 830 } 831 } 832 833 // Store a forward declaration to this class type in case any 834 // parameters in any class methods need it for the clang 835 // types for function prototypes. 836 LinkDeclContextToDIE(m_ast.GetDeclContextForType(clang_type), die); 837 type_sp.reset (new Type (die.GetID(), 838 dwarf, 839 type_name_const_str, 840 byte_size, 841 NULL, 842 LLDB_INVALID_UID, 843 Type::eEncodingIsUID, 844 &decl, 845 clang_type, 846 Type::eResolveStateForward)); 847 848 type_sp->SetIsCompleteObjCClass(is_complete_objc_class); 849 850 851 // Add our type to the unique type map so we don't 852 // end up creating many copies of the same type over 853 // and over in the ASTContext for our module 854 unique_ast_entry_ap->m_type_sp = type_sp; 855 unique_ast_entry_ap->m_die = die; 856 unique_ast_entry_ap->m_declaration = unique_decl; 857 unique_ast_entry_ap->m_byte_size = byte_size; 858 dwarf->GetUniqueDWARFASTTypeMap().Insert (unique_typename, 859 *unique_ast_entry_ap); 860 861 if (is_forward_declaration && die.HasChildren()) 862 { 863 // Check to see if the DIE actually has a definition, some version of GCC will 864 // emit DIEs with DW_AT_declaration set to true, but yet still have subprogram, 865 // members, or inheritance, so we can't trust it 866 DWARFDIE child_die = die.GetFirstChild(); 867 while (child_die) 868 { 869 switch (child_die.Tag()) 870 { 871 case DW_TAG_inheritance: 872 case DW_TAG_subprogram: 873 case DW_TAG_member: 874 case DW_TAG_APPLE_property: 875 case DW_TAG_class_type: 876 case DW_TAG_structure_type: 877 case DW_TAG_enumeration_type: 878 case DW_TAG_typedef: 879 case DW_TAG_union_type: 880 child_die.Clear(); 881 is_forward_declaration = false; 882 break; 883 default: 884 child_die = child_die.GetSibling(); 885 break; 886 } 887 } 888 } 889 890 if (!is_forward_declaration) 891 { 892 // Always start the definition for a class type so that 893 // if the class has child classes or types that require 894 // the class to be created for use as their decl contexts 895 // the class will be ready to accept these child definitions. 896 if (die.HasChildren() == false) 897 { 898 // No children for this struct/union/class, lets finish it 899 ClangASTContext::StartTagDeclarationDefinition (clang_type); 900 ClangASTContext::CompleteTagDeclarationDefinition (clang_type); 901 902 if (tag == DW_TAG_structure_type) // this only applies in C 903 { 904 clang::RecordDecl *record_decl = ClangASTContext::GetAsRecordDecl(clang_type); 905 906 if (record_decl) 907 { 908 GetClangASTImporter().InsertRecordDecl(record_decl, ClangASTImporter::LayoutInfo()); 909 } 910 } 911 } 912 else if (clang_type_was_created) 913 { 914 // Start the definition if the class is not objective C since 915 // the underlying decls respond to isCompleteDefinition(). Objective 916 // C decls don't respond to isCompleteDefinition() so we can't 917 // start the declaration definition right away. For C++ class/union/structs 918 // we want to start the definition in case the class is needed as the 919 // declaration context for a contained class or type without the need 920 // to complete that type.. 921 922 if (class_language != eLanguageTypeObjC && 923 class_language != eLanguageTypeObjC_plus_plus) 924 ClangASTContext::StartTagDeclarationDefinition (clang_type); 925 926 // Leave this as a forward declaration until we need 927 // to know the details of the type. lldb_private::Type 928 // will automatically call the SymbolFile virtual function 929 // "SymbolFileDWARF::CompleteType(Type *)" 930 // When the definition needs to be defined. 931 assert(!dwarf->GetForwardDeclClangTypeToDie().count( 932 ClangUtil::RemoveFastQualifiers(clang_type).GetOpaqueQualType()) && 933 "Type already in the forward declaration map!"); 934 // Can't assume m_ast.GetSymbolFile() is actually a SymbolFileDWARF, it can be a 935 // SymbolFileDWARFDebugMap for Apple binaries. 936 dwarf->GetForwardDeclDieToClangType()[die.GetDIE()] = clang_type.GetOpaqueQualType(); 937 dwarf->GetForwardDeclClangTypeToDie()[ClangUtil::RemoveFastQualifiers(clang_type) 938 .GetOpaqueQualType()] = die.GetDIERef(); 939 m_ast.SetHasExternalStorage (clang_type.GetOpaqueQualType(), true); 940 } 941 } 942 } 943 break; 944 945 case DW_TAG_enumeration_type: 946 { 947 // Set a bit that lets us know that we are currently parsing this 948 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 949 950 DWARFFormValue encoding_form; 951 952 const size_t num_attributes = die.GetAttributes (attributes); 953 if (num_attributes > 0) 954 { 955 uint32_t i; 956 957 for (i=0; i<num_attributes; ++i) 958 { 959 attr = attributes.AttributeAtIndex(i); 960 if (attributes.ExtractFormValueAtIndex(i, form_value)) 961 { 962 switch (attr) 963 { 964 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 965 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 966 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 967 case DW_AT_name: 968 type_name_cstr = form_value.AsCString(); 969 type_name_const_str.SetCString(type_name_cstr); 970 break; 971 case DW_AT_type: encoding_form = form_value; break; 972 case DW_AT_byte_size: byte_size = form_value.Unsigned(); break; 973 case DW_AT_accessibility: break; //accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 974 case DW_AT_declaration: is_forward_declaration = form_value.Boolean(); break; 975 case DW_AT_allocated: 976 case DW_AT_associated: 977 case DW_AT_bit_stride: 978 case DW_AT_byte_stride: 979 case DW_AT_data_location: 980 case DW_AT_description: 981 case DW_AT_start_scope: 982 case DW_AT_visibility: 983 case DW_AT_specification: 984 case DW_AT_abstract_origin: 985 case DW_AT_sibling: 986 break; 987 } 988 } 989 } 990 991 if (is_forward_declaration) 992 { 993 type_sp = ParseTypeFromDWO(die, log); 994 if (type_sp) 995 return type_sp; 996 997 DWARFDeclContext die_decl_ctx; 998 die.GetDWARFDeclContext(die_decl_ctx); 999 1000 type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx); 1001 1002 if (!type_sp) 1003 { 1004 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 1005 if (debug_map_symfile) 1006 { 1007 // We weren't able to find a full declaration in 1008 // this DWARF, see if we have a declaration anywhere 1009 // else... 1010 type_sp = debug_map_symfile->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx); 1011 } 1012 } 1013 1014 if (type_sp) 1015 { 1016 if (log) 1017 { 1018 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 1019 "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, complete type is 0x%8.8" PRIx64, 1020 static_cast<void*>(this), 1021 die.GetOffset(), 1022 DW_TAG_value_to_name(tag), 1023 type_name_cstr, 1024 type_sp->GetID()); 1025 } 1026 1027 // We found a real definition for this type elsewhere 1028 // so lets use it and cache the fact that we found 1029 // a complete type for this die 1030 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1031 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE(dwarf->DebugInfo()->GetDIE(DIERef(type_sp->GetID(), dwarf))); 1032 if (defn_decl_ctx) 1033 LinkDeclContextToDIE(defn_decl_ctx, die); 1034 return type_sp; 1035 } 1036 1037 } 1038 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr); 1039 1040 CompilerType enumerator_clang_type; 1041 clang_type.SetCompilerType (&m_ast, dwarf->GetForwardDeclDieToClangType().lookup (die.GetDIE())); 1042 if (!clang_type) 1043 { 1044 if (encoding_form.IsValid()) 1045 { 1046 Type *enumerator_type = dwarf->ResolveTypeUID(DIERef(encoding_form)); 1047 if (enumerator_type) 1048 enumerator_clang_type = enumerator_type->GetFullCompilerType (); 1049 } 1050 1051 if (!enumerator_clang_type) 1052 { 1053 if (byte_size > 0) 1054 { 1055 enumerator_clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize(NULL, 1056 DW_ATE_signed, 1057 byte_size * 8); 1058 } 1059 else 1060 { 1061 enumerator_clang_type = m_ast.GetBasicType(eBasicTypeInt); 1062 } 1063 } 1064 1065 clang_type = m_ast.CreateEnumerationType (type_name_cstr, 1066 GetClangDeclContextContainingDIE (die, nullptr), 1067 decl, 1068 enumerator_clang_type); 1069 } 1070 else 1071 { 1072 enumerator_clang_type = m_ast.GetEnumerationIntegerType (clang_type.GetOpaqueQualType()); 1073 } 1074 1075 LinkDeclContextToDIE(ClangASTContext::GetDeclContextForType(clang_type), die); 1076 1077 type_sp.reset( new Type (die.GetID(), 1078 dwarf, 1079 type_name_const_str, 1080 byte_size, 1081 NULL, 1082 DIERef(encoding_form).GetUID(dwarf), 1083 Type::eEncodingIsUID, 1084 &decl, 1085 clang_type, 1086 Type::eResolveStateForward)); 1087 1088 ClangASTContext::StartTagDeclarationDefinition (clang_type); 1089 if (die.HasChildren()) 1090 { 1091 SymbolContext cu_sc(die.GetLLDBCompileUnit()); 1092 bool is_signed = false; 1093 enumerator_clang_type.IsIntegerType(is_signed); 1094 ParseChildEnumerators(cu_sc, clang_type, is_signed, type_sp->GetByteSize(), die); 1095 } 1096 ClangASTContext::CompleteTagDeclarationDefinition (clang_type); 1097 } 1098 } 1099 break; 1100 1101 case DW_TAG_inlined_subroutine: 1102 case DW_TAG_subprogram: 1103 case DW_TAG_subroutine_type: 1104 { 1105 // Set a bit that lets us know that we are currently parsing this 1106 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1107 1108 DWARFFormValue type_die_form; 1109 bool is_variadic = false; 1110 bool is_inline = false; 1111 bool is_static = false; 1112 bool is_virtual = false; 1113 bool is_explicit = false; 1114 bool is_artificial = false; 1115 bool has_template_params = false; 1116 DWARFFormValue specification_die_form; 1117 DWARFFormValue abstract_origin_die_form; 1118 dw_offset_t object_pointer_die_offset = DW_INVALID_OFFSET; 1119 1120 unsigned type_quals = 0; 1121 clang::StorageClass storage = clang::SC_None;//, Extern, Static, PrivateExtern 1122 1123 1124 const size_t num_attributes = die.GetAttributes (attributes); 1125 if (num_attributes > 0) 1126 { 1127 uint32_t i; 1128 for (i=0; i<num_attributes; ++i) 1129 { 1130 attr = attributes.AttributeAtIndex(i); 1131 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1132 { 1133 switch (attr) 1134 { 1135 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 1136 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 1137 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 1138 case DW_AT_name: 1139 type_name_cstr = form_value.AsCString(); 1140 type_name_const_str.SetCString(type_name_cstr); 1141 break; 1142 1143 case DW_AT_linkage_name: 1144 case DW_AT_MIPS_linkage_name: break; // mangled = form_value.AsCString(&dwarf->get_debug_str_data()); break; 1145 case DW_AT_type: type_die_form = form_value; break; 1146 case DW_AT_accessibility: accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 1147 case DW_AT_declaration: break; // is_forward_declaration = form_value.Boolean(); break; 1148 case DW_AT_inline: is_inline = form_value.Boolean(); break; 1149 case DW_AT_virtuality: is_virtual = form_value.Boolean(); break; 1150 case DW_AT_explicit: is_explicit = form_value.Boolean(); break; 1151 case DW_AT_artificial: is_artificial = form_value.Boolean(); break; 1152 1153 1154 case DW_AT_external: 1155 if (form_value.Unsigned()) 1156 { 1157 if (storage == clang::SC_None) 1158 storage = clang::SC_Extern; 1159 else 1160 storage = clang::SC_PrivateExtern; 1161 } 1162 break; 1163 1164 case DW_AT_specification: 1165 specification_die_form = form_value; 1166 break; 1167 1168 case DW_AT_abstract_origin: 1169 abstract_origin_die_form = form_value; 1170 break; 1171 1172 case DW_AT_object_pointer: 1173 object_pointer_die_offset = form_value.Reference(); 1174 break; 1175 1176 case DW_AT_allocated: 1177 case DW_AT_associated: 1178 case DW_AT_address_class: 1179 case DW_AT_calling_convention: 1180 case DW_AT_data_location: 1181 case DW_AT_elemental: 1182 case DW_AT_entry_pc: 1183 case DW_AT_frame_base: 1184 case DW_AT_high_pc: 1185 case DW_AT_low_pc: 1186 case DW_AT_prototyped: 1187 case DW_AT_pure: 1188 case DW_AT_ranges: 1189 case DW_AT_recursive: 1190 case DW_AT_return_addr: 1191 case DW_AT_segment: 1192 case DW_AT_start_scope: 1193 case DW_AT_static_link: 1194 case DW_AT_trampoline: 1195 case DW_AT_visibility: 1196 case DW_AT_vtable_elem_location: 1197 case DW_AT_description: 1198 case DW_AT_sibling: 1199 break; 1200 } 1201 } 1202 } 1203 } 1204 1205 std::string object_pointer_name; 1206 if (object_pointer_die_offset != DW_INVALID_OFFSET) 1207 { 1208 DWARFDIE object_pointer_die = die.GetDIE (object_pointer_die_offset); 1209 if (object_pointer_die) 1210 { 1211 const char *object_pointer_name_cstr = object_pointer_die.GetName(); 1212 if (object_pointer_name_cstr) 1213 object_pointer_name = object_pointer_name_cstr; 1214 } 1215 } 1216 1217 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr); 1218 1219 CompilerType return_clang_type; 1220 Type *func_type = NULL; 1221 1222 if (type_die_form.IsValid()) 1223 func_type = dwarf->ResolveTypeUID(DIERef(type_die_form)); 1224 1225 if (func_type) 1226 return_clang_type = func_type->GetForwardCompilerType (); 1227 else 1228 return_clang_type = m_ast.GetBasicType(eBasicTypeVoid); 1229 1230 1231 std::vector<CompilerType> function_param_types; 1232 std::vector<clang::ParmVarDecl*> function_param_decls; 1233 1234 // Parse the function children for the parameters 1235 1236 DWARFDIE decl_ctx_die; 1237 clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (die, &decl_ctx_die); 1238 const clang::Decl::Kind containing_decl_kind = containing_decl_ctx->getDeclKind(); 1239 1240 bool is_cxx_method = DeclKindIsCXXClass (containing_decl_kind); 1241 // Start off static. This will be set to false in ParseChildParameters(...) 1242 // if we find a "this" parameters as the first parameter 1243 if (is_cxx_method) 1244 { 1245 is_static = true; 1246 } 1247 1248 if (die.HasChildren()) 1249 { 1250 bool skip_artificial = true; 1251 ParseChildParameters (sc, 1252 containing_decl_ctx, 1253 die, 1254 skip_artificial, 1255 is_static, 1256 is_variadic, 1257 has_template_params, 1258 function_param_types, 1259 function_param_decls, 1260 type_quals); 1261 } 1262 1263 bool ignore_containing_context = false; 1264 // Check for templatized class member functions. If we had any DW_TAG_template_type_parameter 1265 // or DW_TAG_template_value_parameter the DW_TAG_subprogram DIE, then we can't let this become 1266 // a method in a class. Why? Because templatized functions are only emitted if one of the 1267 // templatized methods is used in the current compile unit and we will end up with classes 1268 // that may or may not include these member functions and this means one class won't match another 1269 // class definition and it affects our ability to use a class in the clang expression parser. So 1270 // for the greater good, we currently must not allow any template member functions in a class definition. 1271 if (is_cxx_method && has_template_params) 1272 { 1273 ignore_containing_context = true; 1274 is_cxx_method = false; 1275 } 1276 1277 // clang_type will get the function prototype clang type after this call 1278 clang_type = m_ast.CreateFunctionType (return_clang_type, 1279 function_param_types.data(), 1280 function_param_types.size(), 1281 is_variadic, 1282 type_quals); 1283 1284 1285 if (type_name_cstr) 1286 { 1287 bool type_handled = false; 1288 if (tag == DW_TAG_subprogram || 1289 tag == DW_TAG_inlined_subroutine) 1290 { 1291 ObjCLanguage::MethodName objc_method (type_name_cstr, true); 1292 if (objc_method.IsValid(true)) 1293 { 1294 CompilerType class_opaque_type; 1295 ConstString class_name(objc_method.GetClassName()); 1296 if (class_name) 1297 { 1298 TypeSP complete_objc_class_type_sp (dwarf->FindCompleteObjCDefinitionTypeForDIE (DWARFDIE(), class_name, false)); 1299 1300 if (complete_objc_class_type_sp) 1301 { 1302 CompilerType type_clang_forward_type = complete_objc_class_type_sp->GetForwardCompilerType (); 1303 if (ClangASTContext::IsObjCObjectOrInterfaceType(type_clang_forward_type)) 1304 class_opaque_type = type_clang_forward_type; 1305 } 1306 } 1307 1308 if (class_opaque_type) 1309 { 1310 // If accessibility isn't set to anything valid, assume public for 1311 // now... 1312 if (accessibility == eAccessNone) 1313 accessibility = eAccessPublic; 1314 1315 clang::ObjCMethodDecl *objc_method_decl = m_ast.AddMethodToObjCObjectType (class_opaque_type, 1316 type_name_cstr, 1317 clang_type, 1318 accessibility, 1319 is_artificial); 1320 type_handled = objc_method_decl != NULL; 1321 if (type_handled) 1322 { 1323 LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(objc_method_decl), die); 1324 m_ast.SetMetadataAsUserID (objc_method_decl, die.GetID()); 1325 } 1326 else 1327 { 1328 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", 1329 die.GetOffset(), 1330 tag, 1331 DW_TAG_value_to_name(tag)); 1332 } 1333 } 1334 } 1335 else if (is_cxx_method) 1336 { 1337 // Look at the parent of this DIE and see if is is 1338 // a class or struct and see if this is actually a 1339 // C++ method 1340 Type *class_type = dwarf->ResolveType (decl_ctx_die); 1341 if (class_type) 1342 { 1343 bool alternate_defn = false; 1344 if (class_type->GetID() != decl_ctx_die.GetID() || decl_ctx_die.GetContainingDWOModuleDIE()) 1345 { 1346 alternate_defn = true; 1347 1348 // We uniqued the parent class of this function to another class 1349 // so we now need to associate all dies under "decl_ctx_die" to 1350 // DIEs in the DIE for "class_type"... 1351 SymbolFileDWARF *class_symfile = NULL; 1352 DWARFDIE class_type_die; 1353 1354 SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile(); 1355 if (debug_map_symfile) 1356 { 1357 class_symfile = debug_map_symfile->GetSymbolFileByOSOIndex(SymbolFileDWARFDebugMap::GetOSOIndexFromUserID(class_type->GetID())); 1358 class_type_die = class_symfile->DebugInfo()->GetDIE (DIERef(class_type->GetID(), dwarf)); 1359 } 1360 else 1361 { 1362 class_symfile = dwarf; 1363 class_type_die = dwarf->DebugInfo()->GetDIE (DIERef(class_type->GetID(), dwarf)); 1364 } 1365 if (class_type_die) 1366 { 1367 DWARFDIECollection failures; 1368 1369 CopyUniqueClassMethodTypes (decl_ctx_die, 1370 class_type_die, 1371 class_type, 1372 failures); 1373 1374 // FIXME do something with these failures that's smarter than 1375 // just dropping them on the ground. Unfortunately classes don't 1376 // like having stuff added to them after their definitions are 1377 // complete... 1378 1379 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1380 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) 1381 { 1382 type_sp = type_ptr->shared_from_this(); 1383 break; 1384 } 1385 } 1386 } 1387 1388 if (specification_die_form.IsValid()) 1389 { 1390 // We have a specification which we are going to base our function 1391 // prototype off of, so we need this type to be completed so that the 1392 // m_die_to_decl_ctx for the method in the specification has a valid 1393 // clang decl context. 1394 class_type->GetForwardCompilerType (); 1395 // If we have a specification, then the function type should have been 1396 // made with the specification and not with this die. 1397 DWARFDIE spec_die = dwarf->DebugInfo()->GetDIE(DIERef(specification_die_form)); 1398 clang::DeclContext *spec_clang_decl_ctx = GetClangDeclContextForDIE (spec_die); 1399 if (spec_clang_decl_ctx) 1400 { 1401 LinkDeclContextToDIE(spec_clang_decl_ctx, die); 1402 } 1403 else 1404 { 1405 dwarf->GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8" PRIx64 ") has no decl\n", 1406 die.GetID(), 1407 specification_die_form.Reference()); 1408 } 1409 type_handled = true; 1410 } 1411 else if (abstract_origin_die_form.IsValid()) 1412 { 1413 // We have a specification which we are going to base our function 1414 // prototype off of, so we need this type to be completed so that the 1415 // m_die_to_decl_ctx for the method in the abstract origin has a valid 1416 // clang decl context. 1417 class_type->GetForwardCompilerType (); 1418 1419 DWARFDIE abs_die = dwarf->DebugInfo()->GetDIE (DIERef(abstract_origin_die_form)); 1420 clang::DeclContext *abs_clang_decl_ctx = GetClangDeclContextForDIE (abs_die); 1421 if (abs_clang_decl_ctx) 1422 { 1423 LinkDeclContextToDIE (abs_clang_decl_ctx, die); 1424 } 1425 else 1426 { 1427 dwarf->GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8" PRIx64 ") has no decl\n", 1428 die.GetID(), 1429 abstract_origin_die_form.Reference()); 1430 } 1431 type_handled = true; 1432 } 1433 else 1434 { 1435 CompilerType class_opaque_type = class_type->GetForwardCompilerType (); 1436 if (ClangASTContext::IsCXXClassType(class_opaque_type)) 1437 { 1438 if (class_opaque_type.IsBeingDefined () || alternate_defn) 1439 { 1440 if (!is_static && !die.HasChildren()) 1441 { 1442 // We have a C++ member function with no children (this pointer!) 1443 // and clang will get mad if we try and make a function that isn't 1444 // well formed in the DWARF, so we will just skip it... 1445 type_handled = true; 1446 } 1447 else 1448 { 1449 bool add_method = true; 1450 if (alternate_defn) 1451 { 1452 // If an alternate definition for the class exists, then add the method only if an 1453 // equivalent is not already present. 1454 clang::CXXRecordDecl *record_decl = m_ast.GetAsCXXRecordDecl(class_opaque_type.GetOpaqueQualType()); 1455 if (record_decl) 1456 { 1457 for (auto method_iter = record_decl->method_begin(); 1458 method_iter != record_decl->method_end(); 1459 method_iter++) 1460 { 1461 clang::CXXMethodDecl *method_decl = *method_iter; 1462 if (method_decl->getNameInfo().getAsString() == std::string(type_name_cstr)) 1463 { 1464 if (method_decl->getType() == 1465 ClangUtil::GetQualType(clang_type)) 1466 { 1467 add_method = false; 1468 LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(method_decl), die); 1469 type_handled = true; 1470 1471 break; 1472 } 1473 } 1474 } 1475 } 1476 } 1477 1478 if (add_method) 1479 { 1480 // REMOVE THE CRASH DESCRIPTION BELOW 1481 Host::SetCrashDescriptionWithFormat ("SymbolFileDWARF::ParseType() is adding a method %s to class %s in DIE 0x%8.8" PRIx64 " from %s", 1482 type_name_cstr, 1483 class_type->GetName().GetCString(), 1484 die.GetID(), 1485 dwarf->GetObjectFile()->GetFileSpec().GetPath().c_str()); 1486 1487 const bool is_attr_used = false; 1488 // Neither GCC 4.2 nor clang++ currently set a valid accessibility 1489 // in the DWARF for C++ methods... Default to public for now... 1490 if (accessibility == eAccessNone) 1491 accessibility = eAccessPublic; 1492 1493 clang::CXXMethodDecl *cxx_method_decl; 1494 cxx_method_decl = m_ast.AddMethodToCXXRecordType (class_opaque_type.GetOpaqueQualType(), 1495 type_name_cstr, 1496 clang_type, 1497 accessibility, 1498 is_virtual, 1499 is_static, 1500 is_inline, 1501 is_explicit, 1502 is_attr_used, 1503 is_artificial); 1504 1505 type_handled = cxx_method_decl != NULL; 1506 1507 if (type_handled) 1508 { 1509 LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(cxx_method_decl), die); 1510 1511 Host::SetCrashDescription (NULL); 1512 1513 ClangASTMetadata metadata; 1514 metadata.SetUserID(die.GetID()); 1515 1516 if (!object_pointer_name.empty()) 1517 { 1518 metadata.SetObjectPtrName(object_pointer_name.c_str()); 1519 if (log) 1520 log->Printf ("Setting object pointer name: %s on method object %p.\n", 1521 object_pointer_name.c_str(), 1522 static_cast<void*>(cxx_method_decl)); 1523 } 1524 m_ast.SetMetadata (cxx_method_decl, metadata); 1525 } 1526 else 1527 { 1528 ignore_containing_context = true; 1529 } 1530 } 1531 } 1532 } 1533 else 1534 { 1535 // We were asked to parse the type for a method in a class, yet the 1536 // class hasn't been asked to complete itself through the 1537 // clang::ExternalASTSource protocol, so we need to just have the 1538 // class complete itself and do things the right way, then our 1539 // DIE should then have an entry in the dwarf->GetDIEToType() map. First 1540 // we need to modify the dwarf->GetDIEToType() so it doesn't think we are 1541 // trying to parse this DIE anymore... 1542 dwarf->GetDIEToType()[die.GetDIE()] = NULL; 1543 1544 // Now we get the full type to force our class type to complete itself 1545 // using the clang::ExternalASTSource protocol which will parse all 1546 // base classes and all methods (including the method for this DIE). 1547 class_type->GetFullCompilerType (); 1548 1549 // The type for this DIE should have been filled in the function call above 1550 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1551 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) 1552 { 1553 type_sp = type_ptr->shared_from_this(); 1554 break; 1555 } 1556 1557 // FIXME This is fixing some even uglier behavior but we really need to 1558 // uniq the methods of each class as well as the class itself. 1559 // <rdar://problem/11240464> 1560 type_handled = true; 1561 } 1562 } 1563 } 1564 } 1565 } 1566 } 1567 1568 if (!type_handled) 1569 { 1570 clang::FunctionDecl *function_decl = nullptr; 1571 1572 if (abstract_origin_die_form.IsValid()) 1573 { 1574 DWARFDIE abs_die = dwarf->DebugInfo()->GetDIE (DIERef(abstract_origin_die_form)); 1575 1576 SymbolContext sc; 1577 1578 if (dwarf->ResolveType (abs_die)) 1579 { 1580 function_decl = llvm::dyn_cast_or_null<clang::FunctionDecl>(GetCachedClangDeclContextForDIE(abs_die)); 1581 1582 if (function_decl) 1583 { 1584 LinkDeclContextToDIE(function_decl, die); 1585 } 1586 } 1587 } 1588 1589 if (!function_decl) 1590 { 1591 // We just have a function that isn't part of a class 1592 function_decl = m_ast.CreateFunctionDeclaration (ignore_containing_context ? m_ast.GetTranslationUnitDecl() : containing_decl_ctx, 1593 type_name_cstr, 1594 clang_type, 1595 storage, 1596 is_inline); 1597 1598 // if (template_param_infos.GetSize() > 0) 1599 // { 1600 // clang::FunctionTemplateDecl *func_template_decl = CreateFunctionTemplateDecl (containing_decl_ctx, 1601 // function_decl, 1602 // type_name_cstr, 1603 // template_param_infos); 1604 // 1605 // CreateFunctionTemplateSpecializationInfo (function_decl, 1606 // func_template_decl, 1607 // template_param_infos); 1608 // } 1609 // Add the decl to our DIE to decl context map 1610 1611 lldbassert (function_decl); 1612 1613 if (function_decl) 1614 { 1615 LinkDeclContextToDIE(function_decl, die); 1616 1617 if (!function_param_decls.empty()) 1618 m_ast.SetFunctionParameters (function_decl, 1619 &function_param_decls.front(), 1620 function_param_decls.size()); 1621 1622 ClangASTMetadata metadata; 1623 metadata.SetUserID(die.GetID()); 1624 1625 if (!object_pointer_name.empty()) 1626 { 1627 metadata.SetObjectPtrName(object_pointer_name.c_str()); 1628 if (log) 1629 log->Printf ("Setting object pointer name: %s on function object %p.", 1630 object_pointer_name.c_str(), 1631 static_cast<void*>(function_decl)); 1632 } 1633 m_ast.SetMetadata (function_decl, metadata); 1634 } 1635 } 1636 } 1637 } 1638 type_sp.reset( new Type (die.GetID(), 1639 dwarf, 1640 type_name_const_str, 1641 0, 1642 NULL, 1643 LLDB_INVALID_UID, 1644 Type::eEncodingIsUID, 1645 &decl, 1646 clang_type, 1647 Type::eResolveStateFull)); 1648 assert(type_sp.get()); 1649 } 1650 break; 1651 1652 case DW_TAG_array_type: 1653 { 1654 // Set a bit that lets us know that we are currently parsing this 1655 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1656 1657 DWARFFormValue type_die_form; 1658 int64_t first_index = 0; 1659 uint32_t byte_stride = 0; 1660 uint32_t bit_stride = 0; 1661 bool is_vector = false; 1662 const size_t num_attributes = die.GetAttributes (attributes); 1663 1664 if (num_attributes > 0) 1665 { 1666 uint32_t i; 1667 for (i=0; i<num_attributes; ++i) 1668 { 1669 attr = attributes.AttributeAtIndex(i); 1670 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1671 { 1672 switch (attr) 1673 { 1674 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 1675 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 1676 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 1677 case DW_AT_name: 1678 type_name_cstr = form_value.AsCString(); 1679 type_name_const_str.SetCString(type_name_cstr); 1680 break; 1681 1682 case DW_AT_type: type_die_form = form_value; break; 1683 case DW_AT_byte_size: break; // byte_size = form_value.Unsigned(); break; 1684 case DW_AT_byte_stride: byte_stride = form_value.Unsigned(); break; 1685 case DW_AT_bit_stride: bit_stride = form_value.Unsigned(); break; 1686 case DW_AT_GNU_vector: is_vector = form_value.Boolean(); break; 1687 case DW_AT_accessibility: break; // accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 1688 case DW_AT_declaration: break; // is_forward_declaration = form_value.Boolean(); break; 1689 case DW_AT_allocated: 1690 case DW_AT_associated: 1691 case DW_AT_data_location: 1692 case DW_AT_description: 1693 case DW_AT_ordering: 1694 case DW_AT_start_scope: 1695 case DW_AT_visibility: 1696 case DW_AT_specification: 1697 case DW_AT_abstract_origin: 1698 case DW_AT_sibling: 1699 break; 1700 } 1701 } 1702 } 1703 1704 DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr); 1705 1706 DIERef type_die_ref(type_die_form); 1707 Type *element_type = dwarf->ResolveTypeUID(type_die_ref); 1708 1709 if (element_type) 1710 { 1711 std::vector<uint64_t> element_orders; 1712 ParseChildArrayInfo(sc, die, first_index, element_orders, byte_stride, bit_stride); 1713 if (byte_stride == 0 && bit_stride == 0) 1714 byte_stride = element_type->GetByteSize(); 1715 CompilerType array_element_type = element_type->GetForwardCompilerType (); 1716 1717 if (ClangASTContext::IsCXXClassType(array_element_type) && array_element_type.GetCompleteType() == false) 1718 { 1719 ModuleSP module_sp = die.GetModule(); 1720 if (module_sp) 1721 { 1722 if (die.GetCU()->GetProducer() == DWARFCompileUnit::eProducerClang) 1723 module_sp->ReportError ("DWARF DW_TAG_array_type DIE at 0x%8.8x has a class/union/struct element type DIE 0x%8.8x that is a forward declaration, not a complete definition.\nTry compiling the source file with -fno-limit-debug-info or disable -gmodule", 1724 die.GetOffset(), 1725 type_die_ref.die_offset); 1726 else 1727 module_sp->ReportError ("DWARF DW_TAG_array_type DIE at 0x%8.8x has a class/union/struct element type DIE 0x%8.8x that is a forward declaration, not a complete definition.\nPlease file a bug against the compiler and include the preprocessed output for %s", 1728 die.GetOffset(), 1729 type_die_ref.die_offset, 1730 die.GetLLDBCompileUnit() ? die.GetLLDBCompileUnit()->GetPath().c_str() : "the source file"); 1731 } 1732 1733 // We have no choice other than to pretend that the element class type 1734 // is complete. If we don't do this, clang will crash when trying 1735 // to layout the class. Since we provide layout assistance, all 1736 // ivars in this class and other classes will be fine, this is 1737 // the best we can do short of crashing. 1738 ClangASTContext::StartTagDeclarationDefinition(array_element_type); 1739 ClangASTContext::CompleteTagDeclarationDefinition(array_element_type); 1740 } 1741 1742 uint64_t array_element_bit_stride = byte_stride * 8 + bit_stride; 1743 if (element_orders.size() > 0) 1744 { 1745 uint64_t num_elements = 0; 1746 std::vector<uint64_t>::const_reverse_iterator pos; 1747 std::vector<uint64_t>::const_reverse_iterator end = element_orders.rend(); 1748 for (pos = element_orders.rbegin(); pos != end; ++pos) 1749 { 1750 num_elements = *pos; 1751 clang_type = m_ast.CreateArrayType (array_element_type, 1752 num_elements, 1753 is_vector); 1754 array_element_type = clang_type; 1755 array_element_bit_stride = num_elements ? 1756 array_element_bit_stride * num_elements : 1757 array_element_bit_stride; 1758 } 1759 } 1760 else 1761 { 1762 clang_type = m_ast.CreateArrayType (array_element_type, 0, is_vector); 1763 } 1764 ConstString empty_name; 1765 type_sp.reset( new Type (die.GetID(), 1766 dwarf, 1767 empty_name, 1768 array_element_bit_stride / 8, 1769 NULL, 1770 DIERef(type_die_form).GetUID(dwarf), 1771 Type::eEncodingIsUID, 1772 &decl, 1773 clang_type, 1774 Type::eResolveStateFull)); 1775 type_sp->SetEncodingType (element_type); 1776 } 1777 } 1778 } 1779 break; 1780 1781 case DW_TAG_ptr_to_member_type: 1782 { 1783 DWARFFormValue type_die_form; 1784 DWARFFormValue containing_type_die_form; 1785 1786 const size_t num_attributes = die.GetAttributes (attributes); 1787 1788 if (num_attributes > 0) { 1789 uint32_t i; 1790 for (i=0; i<num_attributes; ++i) 1791 { 1792 attr = attributes.AttributeAtIndex(i); 1793 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1794 { 1795 switch (attr) 1796 { 1797 case DW_AT_type: 1798 type_die_form = form_value; break; 1799 case DW_AT_containing_type: 1800 containing_type_die_form = form_value; break; 1801 } 1802 } 1803 } 1804 1805 Type *pointee_type = dwarf->ResolveTypeUID(DIERef(type_die_form)); 1806 Type *class_type = dwarf->ResolveTypeUID(DIERef(containing_type_die_form)); 1807 1808 CompilerType pointee_clang_type = pointee_type->GetForwardCompilerType (); 1809 CompilerType class_clang_type = class_type->GetLayoutCompilerType (); 1810 1811 clang_type = ClangASTContext::CreateMemberPointerType(class_clang_type, pointee_clang_type); 1812 1813 byte_size = clang_type.GetByteSize(nullptr); 1814 1815 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, byte_size, NULL, 1816 LLDB_INVALID_UID, Type::eEncodingIsUID, NULL, clang_type, 1817 Type::eResolveStateForward)); 1818 } 1819 1820 break; 1821 } 1822 default: 1823 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", 1824 die.GetOffset(), 1825 tag, 1826 DW_TAG_value_to_name(tag)); 1827 break; 1828 } 1829 1830 if (type_sp.get()) 1831 { 1832 DWARFDIE sc_parent_die = SymbolFileDWARF::GetParentSymbolContextDIE(die); 1833 dw_tag_t sc_parent_tag = sc_parent_die.Tag(); 1834 1835 SymbolContextScope * symbol_context_scope = NULL; 1836 if (sc_parent_tag == DW_TAG_compile_unit) 1837 { 1838 symbol_context_scope = sc.comp_unit; 1839 } 1840 else if (sc.function != NULL && sc_parent_die) 1841 { 1842 symbol_context_scope = sc.function->GetBlock(true).FindBlockByID(sc_parent_die.GetID()); 1843 if (symbol_context_scope == NULL) 1844 symbol_context_scope = sc.function; 1845 } 1846 1847 if (symbol_context_scope != NULL) 1848 { 1849 type_sp->SetSymbolContextScope(symbol_context_scope); 1850 } 1851 1852 // We are ready to put this type into the uniqued list up at the module level 1853 type_list->Insert (type_sp); 1854 1855 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1856 } 1857 } 1858 else if (type_ptr != DIE_IS_BEING_PARSED) 1859 { 1860 type_sp = type_ptr->shared_from_this(); 1861 } 1862 } 1863 return type_sp; 1864 } 1865 1866 // DWARF parsing functions 1867 1868 class DWARFASTParserClang::DelayedAddObjCClassProperty 1869 { 1870 public: 1871 DelayedAddObjCClassProperty(const CompilerType &class_opaque_type, 1872 const char *property_name, 1873 const CompilerType &property_opaque_type, // The property type is only required if you don't have an ivar decl 1874 clang::ObjCIvarDecl *ivar_decl, 1875 const char *property_setter_name, 1876 const char *property_getter_name, 1877 uint32_t property_attributes, 1878 const ClangASTMetadata *metadata) : 1879 m_class_opaque_type (class_opaque_type), 1880 m_property_name (property_name), 1881 m_property_opaque_type (property_opaque_type), 1882 m_ivar_decl (ivar_decl), 1883 m_property_setter_name (property_setter_name), 1884 m_property_getter_name (property_getter_name), 1885 m_property_attributes (property_attributes) 1886 { 1887 if (metadata != NULL) 1888 { 1889 m_metadata_ap.reset(new ClangASTMetadata()); 1890 *m_metadata_ap = *metadata; 1891 } 1892 } 1893 1894 DelayedAddObjCClassProperty (const DelayedAddObjCClassProperty &rhs) 1895 { 1896 *this = rhs; 1897 } 1898 1899 DelayedAddObjCClassProperty& operator= (const DelayedAddObjCClassProperty &rhs) 1900 { 1901 m_class_opaque_type = rhs.m_class_opaque_type; 1902 m_property_name = rhs.m_property_name; 1903 m_property_opaque_type = rhs.m_property_opaque_type; 1904 m_ivar_decl = rhs.m_ivar_decl; 1905 m_property_setter_name = rhs.m_property_setter_name; 1906 m_property_getter_name = rhs.m_property_getter_name; 1907 m_property_attributes = rhs.m_property_attributes; 1908 1909 if (rhs.m_metadata_ap.get()) 1910 { 1911 m_metadata_ap.reset (new ClangASTMetadata()); 1912 *m_metadata_ap = *rhs.m_metadata_ap; 1913 } 1914 return *this; 1915 } 1916 1917 bool 1918 Finalize() 1919 { 1920 return ClangASTContext::AddObjCClassProperty (m_class_opaque_type, 1921 m_property_name, 1922 m_property_opaque_type, 1923 m_ivar_decl, 1924 m_property_setter_name, 1925 m_property_getter_name, 1926 m_property_attributes, 1927 m_metadata_ap.get()); 1928 } 1929 1930 private: 1931 CompilerType m_class_opaque_type; 1932 const char *m_property_name; 1933 CompilerType m_property_opaque_type; 1934 clang::ObjCIvarDecl *m_ivar_decl; 1935 const char *m_property_setter_name; 1936 const char *m_property_getter_name; 1937 uint32_t m_property_attributes; 1938 std::unique_ptr<ClangASTMetadata> m_metadata_ap; 1939 }; 1940 1941 bool 1942 DWARFASTParserClang::ParseTemplateDIE (const DWARFDIE &die, 1943 ClangASTContext::TemplateParameterInfos &template_param_infos) 1944 { 1945 const dw_tag_t tag = die.Tag(); 1946 1947 switch (tag) 1948 { 1949 case DW_TAG_template_type_parameter: 1950 case DW_TAG_template_value_parameter: 1951 { 1952 DWARFAttributes attributes; 1953 const size_t num_attributes = die.GetAttributes (attributes); 1954 const char *name = NULL; 1955 Type *lldb_type = NULL; 1956 CompilerType clang_type; 1957 uint64_t uval64 = 0; 1958 bool uval64_valid = false; 1959 if (num_attributes > 0) 1960 { 1961 DWARFFormValue form_value; 1962 for (size_t i=0; i<num_attributes; ++i) 1963 { 1964 const dw_attr_t attr = attributes.AttributeAtIndex(i); 1965 1966 switch (attr) 1967 { 1968 case DW_AT_name: 1969 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1970 name = form_value.AsCString(); 1971 break; 1972 1973 case DW_AT_type: 1974 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1975 { 1976 lldb_type = die.ResolveTypeUID(DIERef(form_value)); 1977 if (lldb_type) 1978 clang_type = lldb_type->GetForwardCompilerType (); 1979 } 1980 break; 1981 1982 case DW_AT_const_value: 1983 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1984 { 1985 uval64_valid = true; 1986 uval64 = form_value.Unsigned(); 1987 } 1988 break; 1989 default: 1990 break; 1991 } 1992 } 1993 1994 clang::ASTContext *ast = m_ast.getASTContext(); 1995 if (!clang_type) 1996 clang_type = m_ast.GetBasicType(eBasicTypeVoid); 1997 1998 if (clang_type) 1999 { 2000 bool is_signed = false; 2001 if (name && name[0]) 2002 template_param_infos.names.push_back(name); 2003 else 2004 template_param_infos.names.push_back(NULL); 2005 2006 if (tag == DW_TAG_template_value_parameter && 2007 lldb_type != NULL && 2008 clang_type.IsIntegerType (is_signed) && 2009 uval64_valid) 2010 { 2011 llvm::APInt apint (lldb_type->GetByteSize() * 8, uval64, is_signed); 2012 template_param_infos.args.push_back( 2013 clang::TemplateArgument(*ast, llvm::APSInt(apint), ClangUtil::GetQualType(clang_type))); 2014 } 2015 else 2016 { 2017 template_param_infos.args.push_back( 2018 clang::TemplateArgument(ClangUtil::GetQualType(clang_type))); 2019 } 2020 } 2021 else 2022 { 2023 return false; 2024 } 2025 2026 } 2027 } 2028 return true; 2029 2030 default: 2031 break; 2032 } 2033 return false; 2034 } 2035 2036 bool 2037 DWARFASTParserClang::ParseTemplateParameterInfos (const DWARFDIE &parent_die, 2038 ClangASTContext::TemplateParameterInfos &template_param_infos) 2039 { 2040 2041 if (!parent_die) 2042 return false; 2043 2044 Args template_parameter_names; 2045 for (DWARFDIE die = parent_die.GetFirstChild(); 2046 die.IsValid(); 2047 die = die.GetSibling()) 2048 { 2049 const dw_tag_t tag = die.Tag(); 2050 2051 switch (tag) 2052 { 2053 case DW_TAG_template_type_parameter: 2054 case DW_TAG_template_value_parameter: 2055 ParseTemplateDIE (die, template_param_infos); 2056 break; 2057 2058 default: 2059 break; 2060 } 2061 } 2062 if (template_param_infos.args.empty()) 2063 return false; 2064 return template_param_infos.args.size() == template_param_infos.names.size(); 2065 } 2066 2067 bool 2068 DWARFASTParserClang::CompleteTypeFromDWARF(const DWARFDIE &die, lldb_private::Type *type, CompilerType &clang_type) 2069 { 2070 SymbolFileDWARF *dwarf = die.GetDWARF(); 2071 2072 std::lock_guard<std::recursive_mutex> guard(dwarf->GetObjectFile()->GetModule()->GetMutex()); 2073 2074 // Disable external storage for this type so we don't get anymore 2075 // clang::ExternalASTSource queries for this type. 2076 m_ast.SetHasExternalStorage (clang_type.GetOpaqueQualType(), false); 2077 2078 if (!die) 2079 return false; 2080 2081 const dw_tag_t tag = die.Tag(); 2082 2083 Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION)); 2084 if (log) 2085 dwarf->GetObjectFile()->GetModule()->LogMessageVerboseBacktrace (log, 2086 "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...", 2087 die.GetID(), 2088 die.GetTagAsCString(), 2089 type->GetName().AsCString()); 2090 assert (clang_type); 2091 DWARFAttributes attributes; 2092 switch (tag) 2093 { 2094 case DW_TAG_structure_type: 2095 case DW_TAG_union_type: 2096 case DW_TAG_class_type: 2097 { 2098 ClangASTImporter::LayoutInfo layout_info; 2099 2100 { 2101 if (die.HasChildren()) 2102 { 2103 LanguageType class_language = eLanguageTypeUnknown; 2104 if (ClangASTContext::IsObjCObjectOrInterfaceType(clang_type)) 2105 { 2106 class_language = eLanguageTypeObjC; 2107 // For objective C we don't start the definition when 2108 // the class is created. 2109 ClangASTContext::StartTagDeclarationDefinition (clang_type); 2110 } 2111 2112 int tag_decl_kind = -1; 2113 AccessType default_accessibility = eAccessNone; 2114 if (tag == DW_TAG_structure_type) 2115 { 2116 tag_decl_kind = clang::TTK_Struct; 2117 default_accessibility = eAccessPublic; 2118 } 2119 else if (tag == DW_TAG_union_type) 2120 { 2121 tag_decl_kind = clang::TTK_Union; 2122 default_accessibility = eAccessPublic; 2123 } 2124 else if (tag == DW_TAG_class_type) 2125 { 2126 tag_decl_kind = clang::TTK_Class; 2127 default_accessibility = eAccessPrivate; 2128 } 2129 2130 SymbolContext sc(die.GetLLDBCompileUnit()); 2131 std::vector<clang::CXXBaseSpecifier *> base_classes; 2132 std::vector<int> member_accessibilities; 2133 bool is_a_class = false; 2134 // Parse members and base classes first 2135 DWARFDIECollection member_function_dies; 2136 2137 DelayedPropertyList delayed_properties; 2138 ParseChildMembers (sc, 2139 die, 2140 clang_type, 2141 class_language, 2142 base_classes, 2143 member_accessibilities, 2144 member_function_dies, 2145 delayed_properties, 2146 default_accessibility, 2147 is_a_class, 2148 layout_info); 2149 2150 // Now parse any methods if there were any... 2151 size_t num_functions = member_function_dies.Size(); 2152 if (num_functions > 0) 2153 { 2154 for (size_t i=0; i<num_functions; ++i) 2155 { 2156 dwarf->ResolveType(member_function_dies.GetDIEAtIndex(i)); 2157 } 2158 } 2159 2160 if (class_language == eLanguageTypeObjC) 2161 { 2162 ConstString class_name (clang_type.GetTypeName()); 2163 if (class_name) 2164 { 2165 DIEArray method_die_offsets; 2166 dwarf->GetObjCMethodDIEOffsets(class_name, method_die_offsets); 2167 2168 if (!method_die_offsets.empty()) 2169 { 2170 DWARFDebugInfo* debug_info = dwarf->DebugInfo(); 2171 2172 const size_t num_matches = method_die_offsets.size(); 2173 for (size_t i=0; i<num_matches; ++i) 2174 { 2175 const DIERef& die_ref = method_die_offsets[i]; 2176 DWARFDIE method_die = debug_info->GetDIE (die_ref); 2177 2178 if (method_die) 2179 method_die.ResolveType (); 2180 } 2181 } 2182 2183 for (DelayedPropertyList::iterator pi = delayed_properties.begin(), pe = delayed_properties.end(); 2184 pi != pe; 2185 ++pi) 2186 pi->Finalize(); 2187 } 2188 } 2189 2190 // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we 2191 // need to tell the clang type it is actually a class. 2192 if (class_language != eLanguageTypeObjC) 2193 { 2194 if (is_a_class && tag_decl_kind != clang::TTK_Class) 2195 m_ast.SetTagTypeKind(ClangUtil::GetQualType(clang_type), clang::TTK_Class); 2196 } 2197 2198 // Since DW_TAG_structure_type gets used for both classes 2199 // and structures, we may need to set any DW_TAG_member 2200 // fields to have a "private" access if none was specified. 2201 // When we parsed the child members we tracked that actual 2202 // accessibility value for each DW_TAG_member in the 2203 // "member_accessibilities" array. If the value for the 2204 // member is zero, then it was set to the "default_accessibility" 2205 // which for structs was "public". Below we correct this 2206 // by setting any fields to "private" that weren't correctly 2207 // set. 2208 if (is_a_class && !member_accessibilities.empty()) 2209 { 2210 // This is a class and all members that didn't have 2211 // their access specified are private. 2212 m_ast.SetDefaultAccessForRecordFields (m_ast.GetAsRecordDecl(clang_type), 2213 eAccessPrivate, 2214 &member_accessibilities.front(), 2215 member_accessibilities.size()); 2216 } 2217 2218 if (!base_classes.empty()) 2219 { 2220 // Make sure all base classes refer to complete types and not 2221 // forward declarations. If we don't do this, clang will crash 2222 // with an assertion in the call to clang_type.SetBaseClassesForClassType() 2223 for (auto &base_class : base_classes) 2224 { 2225 clang::TypeSourceInfo *type_source_info = base_class->getTypeSourceInfo(); 2226 if (type_source_info) 2227 { 2228 CompilerType base_class_type (&m_ast, type_source_info->getType().getAsOpaquePtr()); 2229 if (base_class_type.GetCompleteType() == false) 2230 { 2231 auto module = dwarf->GetObjectFile()->GetModule(); 2232 module->ReportError ( 2233 ":: Class '%s' has a base class '%s' which does not have a complete definition.", 2234 die.GetName(), 2235 base_class_type.GetTypeName().GetCString()); 2236 if (die.GetCU()->GetProducer() == DWARFCompileUnit::eProducerClang) 2237 module->ReportError (":: Try compiling the source file with -fno-limit-debug-info."); 2238 2239 // We have no choice other than to pretend that the base class 2240 // is complete. If we don't do this, clang will crash when we 2241 // call setBases() inside of "clang_type.SetBaseClassesForClassType()" 2242 // below. Since we provide layout assistance, all ivars in this 2243 // class and other classes will be fine, this is the best we can do 2244 // short of crashing. 2245 ClangASTContext::StartTagDeclarationDefinition (base_class_type); 2246 ClangASTContext::CompleteTagDeclarationDefinition (base_class_type); 2247 } 2248 } 2249 } 2250 m_ast.SetBaseClassesForClassType (clang_type.GetOpaqueQualType(), 2251 &base_classes.front(), 2252 base_classes.size()); 2253 2254 // Clang will copy each CXXBaseSpecifier in "base_classes" 2255 // so we have to free them all. 2256 ClangASTContext::DeleteBaseClassSpecifiers (&base_classes.front(), 2257 base_classes.size()); 2258 } 2259 } 2260 } 2261 2262 ClangASTContext::BuildIndirectFields (clang_type); 2263 ClangASTContext::CompleteTagDeclarationDefinition (clang_type); 2264 2265 if (!layout_info.field_offsets.empty() || 2266 !layout_info.base_offsets.empty() || 2267 !layout_info.vbase_offsets.empty() ) 2268 { 2269 if (type) 2270 layout_info.bit_size = type->GetByteSize() * 8; 2271 if (layout_info.bit_size == 0) 2272 layout_info.bit_size = die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 0) * 8; 2273 2274 clang::CXXRecordDecl *record_decl = m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 2275 if (record_decl) 2276 { 2277 if (log) 2278 { 2279 ModuleSP module_sp = dwarf->GetObjectFile()->GetModule(); 2280 2281 if (module_sp) 2282 { 2283 module_sp->LogMessage (log, 2284 "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])", 2285 static_cast<void*>(clang_type.GetOpaqueQualType()), 2286 static_cast<void*>(record_decl), 2287 layout_info.bit_size, 2288 layout_info.alignment, 2289 static_cast<uint32_t>(layout_info.field_offsets.size()), 2290 static_cast<uint32_t>(layout_info.base_offsets.size()), 2291 static_cast<uint32_t>(layout_info.vbase_offsets.size())); 2292 2293 uint32_t idx; 2294 { 2295 llvm::DenseMap<const clang::FieldDecl *, uint64_t>::const_iterator pos, 2296 end = layout_info.field_offsets.end(); 2297 for (idx = 0, pos = layout_info.field_offsets.begin(); pos != end; ++pos, ++idx) 2298 { 2299 module_sp->LogMessage(log, 2300 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) field[%u] = { bit_offset=%u, name='%s' }", 2301 static_cast<void *>(clang_type.GetOpaqueQualType()), 2302 idx, 2303 static_cast<uint32_t>(pos->second), 2304 pos->first->getNameAsString().c_str()); 2305 } 2306 } 2307 2308 { 2309 llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits>::const_iterator base_pos, 2310 base_end = layout_info.base_offsets.end(); 2311 for (idx = 0, base_pos = layout_info.base_offsets.begin(); base_pos != base_end; ++base_pos, ++idx) 2312 { 2313 module_sp->LogMessage(log, 2314 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) base[%u] = { byte_offset=%u, name='%s' }", 2315 clang_type.GetOpaqueQualType(), idx, (uint32_t)base_pos->second.getQuantity(), 2316 base_pos->first->getNameAsString().c_str()); 2317 } 2318 } 2319 { 2320 llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits>::const_iterator vbase_pos, 2321 vbase_end = layout_info.vbase_offsets.end(); 2322 for (idx = 0, vbase_pos = layout_info.vbase_offsets.begin(); vbase_pos != vbase_end; ++vbase_pos, ++idx) 2323 { 2324 module_sp->LogMessage(log, 2325 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) vbase[%u] = { byte_offset=%u, name='%s' }", 2326 static_cast<void *>(clang_type.GetOpaqueQualType()), idx, 2327 static_cast<uint32_t>(vbase_pos->second.getQuantity()), 2328 vbase_pos->first->getNameAsString().c_str()); 2329 } 2330 } 2331 2332 } 2333 } 2334 GetClangASTImporter().InsertRecordDecl(record_decl, layout_info); 2335 } 2336 } 2337 } 2338 2339 return (bool)clang_type; 2340 2341 case DW_TAG_enumeration_type: 2342 ClangASTContext::StartTagDeclarationDefinition (clang_type); 2343 if (die.HasChildren()) 2344 { 2345 SymbolContext sc(die.GetLLDBCompileUnit()); 2346 bool is_signed = false; 2347 clang_type.IsIntegerType(is_signed); 2348 ParseChildEnumerators(sc, clang_type, is_signed, type->GetByteSize(), die); 2349 } 2350 ClangASTContext::CompleteTagDeclarationDefinition (clang_type); 2351 return (bool)clang_type; 2352 2353 default: 2354 assert(false && "not a forward clang type decl!"); 2355 break; 2356 } 2357 2358 return false; 2359 } 2360 2361 std::vector<DWARFDIE> 2362 DWARFASTParserClang::GetDIEForDeclContext(lldb_private::CompilerDeclContext decl_context) 2363 { 2364 std::vector<DWARFDIE> result; 2365 for (auto it = m_decl_ctx_to_die.find((clang::DeclContext *)decl_context.GetOpaqueDeclContext()); it != m_decl_ctx_to_die.end(); it++) 2366 result.push_back(it->second); 2367 return result; 2368 } 2369 2370 CompilerDecl 2371 DWARFASTParserClang::GetDeclForUIDFromDWARF (const DWARFDIE &die) 2372 { 2373 clang::Decl *clang_decl = GetClangDeclForDIE(die); 2374 if (clang_decl != nullptr) 2375 return CompilerDecl(&m_ast, clang_decl); 2376 return CompilerDecl(); 2377 } 2378 2379 CompilerDeclContext 2380 DWARFASTParserClang::GetDeclContextForUIDFromDWARF (const DWARFDIE &die) 2381 { 2382 clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE (die); 2383 if (clang_decl_ctx) 2384 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2385 return CompilerDeclContext(); 2386 } 2387 2388 CompilerDeclContext 2389 DWARFASTParserClang::GetDeclContextContainingUIDFromDWARF (const DWARFDIE &die) 2390 { 2391 clang::DeclContext *clang_decl_ctx = GetClangDeclContextContainingDIE (die, nullptr); 2392 if (clang_decl_ctx) 2393 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2394 return CompilerDeclContext(); 2395 } 2396 2397 size_t 2398 DWARFASTParserClang::ParseChildEnumerators (const SymbolContext& sc, 2399 lldb_private::CompilerType &clang_type, 2400 bool is_signed, 2401 uint32_t enumerator_byte_size, 2402 const DWARFDIE &parent_die) 2403 { 2404 if (!parent_die) 2405 return 0; 2406 2407 size_t enumerators_added = 0; 2408 2409 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); die = die.GetSibling()) 2410 { 2411 const dw_tag_t tag = die.Tag(); 2412 if (tag == DW_TAG_enumerator) 2413 { 2414 DWARFAttributes attributes; 2415 const size_t num_child_attributes = die.GetAttributes(attributes); 2416 if (num_child_attributes > 0) 2417 { 2418 const char *name = NULL; 2419 bool got_value = false; 2420 int64_t enum_value = 0; 2421 Declaration decl; 2422 2423 uint32_t i; 2424 for (i=0; i<num_child_attributes; ++i) 2425 { 2426 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2427 DWARFFormValue form_value; 2428 if (attributes.ExtractFormValueAtIndex(i, form_value)) 2429 { 2430 switch (attr) 2431 { 2432 case DW_AT_const_value: 2433 got_value = true; 2434 if (is_signed) 2435 enum_value = form_value.Signed(); 2436 else 2437 enum_value = form_value.Unsigned(); 2438 break; 2439 2440 case DW_AT_name: 2441 name = form_value.AsCString(); 2442 break; 2443 2444 case DW_AT_description: 2445 default: 2446 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 2447 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 2448 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 2449 case DW_AT_sibling: 2450 break; 2451 } 2452 } 2453 } 2454 2455 if (name && name[0] && got_value) 2456 { 2457 m_ast.AddEnumerationValueToEnumerationType (clang_type.GetOpaqueQualType(), 2458 m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType()), 2459 decl, 2460 name, 2461 enum_value, 2462 enumerator_byte_size * 8); 2463 ++enumerators_added; 2464 } 2465 } 2466 } 2467 } 2468 return enumerators_added; 2469 } 2470 2471 #if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE) 2472 2473 class DIEStack 2474 { 2475 public: 2476 2477 void Push (const DWARFDIE &die) 2478 { 2479 m_dies.push_back (die); 2480 } 2481 2482 2483 void LogDIEs (Log *log) 2484 { 2485 StreamString log_strm; 2486 const size_t n = m_dies.size(); 2487 log_strm.Printf("DIEStack[%" PRIu64 "]:\n", (uint64_t)n); 2488 for (size_t i=0; i<n; i++) 2489 { 2490 std::string qualified_name; 2491 const DWARFDIE &die = m_dies[i]; 2492 die.GetQualifiedName(qualified_name); 2493 log_strm.Printf ("[%" PRIu64 "] 0x%8.8x: %s name='%s'\n", 2494 (uint64_t)i, 2495 die.GetOffset(), 2496 die.GetTagAsCString(), 2497 qualified_name.c_str()); 2498 } 2499 log->PutCString(log_strm.GetData()); 2500 } 2501 void Pop () 2502 { 2503 m_dies.pop_back(); 2504 } 2505 2506 class ScopedPopper 2507 { 2508 public: 2509 ScopedPopper (DIEStack &die_stack) : 2510 m_die_stack (die_stack), 2511 m_valid (false) 2512 { 2513 } 2514 2515 void 2516 Push (const DWARFDIE &die) 2517 { 2518 m_valid = true; 2519 m_die_stack.Push (die); 2520 } 2521 2522 ~ScopedPopper () 2523 { 2524 if (m_valid) 2525 m_die_stack.Pop(); 2526 } 2527 2528 2529 2530 protected: 2531 DIEStack &m_die_stack; 2532 bool m_valid; 2533 }; 2534 2535 protected: 2536 typedef std::vector<DWARFDIE> Stack; 2537 Stack m_dies; 2538 }; 2539 #endif 2540 2541 Function * 2542 DWARFASTParserClang::ParseFunctionFromDWARF (const SymbolContext& sc, 2543 const DWARFDIE &die) 2544 { 2545 DWARFRangeList func_ranges; 2546 const char *name = NULL; 2547 const char *mangled = NULL; 2548 int decl_file = 0; 2549 int decl_line = 0; 2550 int decl_column = 0; 2551 int call_file = 0; 2552 int call_line = 0; 2553 int call_column = 0; 2554 DWARFExpression frame_base(die.GetCU()); 2555 2556 const dw_tag_t tag = die.Tag(); 2557 2558 if (tag != DW_TAG_subprogram) 2559 return NULL; 2560 2561 if (die.GetDIENamesAndRanges (name, 2562 mangled, 2563 func_ranges, 2564 decl_file, 2565 decl_line, 2566 decl_column, 2567 call_file, 2568 call_line, 2569 call_column, 2570 &frame_base)) 2571 { 2572 2573 // Union of all ranges in the function DIE (if the function is discontiguous) 2574 AddressRange func_range; 2575 lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase (0); 2576 lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd (0); 2577 if (lowest_func_addr != LLDB_INVALID_ADDRESS && lowest_func_addr <= highest_func_addr) 2578 { 2579 ModuleSP module_sp (die.GetModule()); 2580 func_range.GetBaseAddress().ResolveAddressUsingFileSections (lowest_func_addr, module_sp->GetSectionList()); 2581 if (func_range.GetBaseAddress().IsValid()) 2582 func_range.SetByteSize(highest_func_addr - lowest_func_addr); 2583 } 2584 2585 if (func_range.GetBaseAddress().IsValid()) 2586 { 2587 Mangled func_name; 2588 if (mangled) 2589 func_name.SetValue(ConstString(mangled), true); 2590 else if (die.GetParent().Tag() == DW_TAG_compile_unit && 2591 Language::LanguageIsCPlusPlus(die.GetLanguage()) && 2592 name && strcmp(name, "main") != 0) 2593 { 2594 // If the mangled name is not present in the DWARF, generate the demangled name 2595 // using the decl context. We skip if the function is "main" as its name is 2596 // never mangled. 2597 bool is_static = false; 2598 bool is_variadic = false; 2599 bool has_template_params = false; 2600 unsigned type_quals = 0; 2601 std::vector<CompilerType> param_types; 2602 std::vector<clang::ParmVarDecl*> param_decls; 2603 DWARFDeclContext decl_ctx; 2604 StreamString sstr; 2605 2606 die.GetDWARFDeclContext(decl_ctx); 2607 sstr << decl_ctx.GetQualifiedName(); 2608 2609 clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE(die, nullptr); 2610 ParseChildParameters(sc, 2611 containing_decl_ctx, 2612 die, 2613 true, 2614 is_static, 2615 is_variadic, 2616 has_template_params, 2617 param_types, 2618 param_decls, 2619 type_quals); 2620 sstr << "("; 2621 for (size_t i = 0; i < param_types.size(); i++) 2622 { 2623 if (i > 0) 2624 sstr << ", "; 2625 sstr << param_types[i].GetTypeName(); 2626 } 2627 if (is_variadic) 2628 sstr << ", ..."; 2629 sstr << ")"; 2630 if (type_quals & clang::Qualifiers::Const) 2631 sstr << " const"; 2632 2633 func_name.SetValue(ConstString(sstr.GetData()), false); 2634 } 2635 else 2636 func_name.SetValue(ConstString(name), false); 2637 2638 FunctionSP func_sp; 2639 std::unique_ptr<Declaration> decl_ap; 2640 if (decl_file != 0 || decl_line != 0 || decl_column != 0) 2641 decl_ap.reset(new Declaration (sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file), 2642 decl_line, 2643 decl_column)); 2644 2645 SymbolFileDWARF *dwarf = die.GetDWARF(); 2646 // Supply the type _only_ if it has already been parsed 2647 Type *func_type = dwarf->GetDIEToType().lookup (die.GetDIE()); 2648 2649 assert(func_type == NULL || func_type != DIE_IS_BEING_PARSED); 2650 2651 if (dwarf->FixupAddress (func_range.GetBaseAddress())) 2652 { 2653 const user_id_t func_user_id = die.GetID(); 2654 func_sp.reset(new Function (sc.comp_unit, 2655 func_user_id, // UserID is the DIE offset 2656 func_user_id, 2657 func_name, 2658 func_type, 2659 func_range)); // first address range 2660 2661 if (func_sp.get() != NULL) 2662 { 2663 if (frame_base.IsValid()) 2664 func_sp->GetFrameBaseExpression() = frame_base; 2665 sc.comp_unit->AddFunction(func_sp); 2666 return func_sp.get(); 2667 } 2668 } 2669 } 2670 } 2671 return NULL; 2672 } 2673 2674 bool 2675 DWARFASTParserClang::ParseChildMembers(const SymbolContext &sc, const DWARFDIE &parent_die, 2676 CompilerType &class_clang_type, const LanguageType class_language, 2677 std::vector<clang::CXXBaseSpecifier *> &base_classes, 2678 std::vector<int> &member_accessibilities, 2679 DWARFDIECollection &member_function_dies, 2680 DelayedPropertyList &delayed_properties, AccessType &default_accessibility, 2681 bool &is_a_class, ClangASTImporter::LayoutInfo &layout_info) 2682 { 2683 if (!parent_die) 2684 return 0; 2685 2686 // Get the parent byte size so we can verify any members will fit 2687 const uint64_t parent_byte_size = parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, UINT64_MAX) * 8; 2688 const uint64_t parent_bit_size = parent_byte_size == UINT64_MAX ? UINT64_MAX : parent_byte_size * 8; 2689 2690 uint32_t member_idx = 0; 2691 BitfieldInfo last_field_info; 2692 2693 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule(); 2694 ClangASTContext *ast = llvm::dyn_cast_or_null<ClangASTContext>(class_clang_type.GetTypeSystem()); 2695 if (ast == nullptr) 2696 return 0; 2697 2698 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); die = die.GetSibling()) 2699 { 2700 dw_tag_t tag = die.Tag(); 2701 2702 switch (tag) 2703 { 2704 case DW_TAG_member: 2705 case DW_TAG_APPLE_property: 2706 { 2707 DWARFAttributes attributes; 2708 const size_t num_attributes = die.GetAttributes (attributes); 2709 if (num_attributes > 0) 2710 { 2711 Declaration decl; 2712 //DWARFExpression location; 2713 const char *name = NULL; 2714 const char *prop_name = NULL; 2715 const char *prop_getter_name = NULL; 2716 const char *prop_setter_name = NULL; 2717 uint32_t prop_attributes = 0; 2718 2719 2720 bool is_artificial = false; 2721 DWARFFormValue encoding_form; 2722 AccessType accessibility = eAccessNone; 2723 uint32_t member_byte_offset = (parent_die.Tag() == DW_TAG_union_type) ? 0 : UINT32_MAX; 2724 size_t byte_size = 0; 2725 int64_t bit_offset = 0; 2726 size_t bit_size = 0; 2727 bool is_external = false; // On DW_TAG_members, this means the member is static 2728 uint32_t i; 2729 for (i=0; i<num_attributes && !is_artificial; ++i) 2730 { 2731 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2732 DWARFFormValue form_value; 2733 if (attributes.ExtractFormValueAtIndex(i, form_value)) 2734 { 2735 switch (attr) 2736 { 2737 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 2738 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 2739 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 2740 case DW_AT_name: name = form_value.AsCString(); break; 2741 case DW_AT_type: encoding_form = form_value; break; 2742 case DW_AT_bit_offset: bit_offset = form_value.Signed(); break; 2743 case DW_AT_bit_size: bit_size = form_value.Unsigned(); break; 2744 case DW_AT_byte_size: byte_size = form_value.Unsigned(); break; 2745 case DW_AT_data_member_location: 2746 if (form_value.BlockData()) 2747 { 2748 Value initialValue(0); 2749 Value memberOffset(0); 2750 const DWARFDataExtractor& debug_info_data = die.GetDWARF()->get_debug_info_data(); 2751 uint32_t block_length = form_value.Unsigned(); 2752 uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart(); 2753 if (DWARFExpression::Evaluate(nullptr, // ExecutionContext * 2754 nullptr, // ClangExpressionVariableList * 2755 nullptr, // ClangExpressionDeclMap * 2756 nullptr, // RegisterContext * 2757 module_sp, 2758 debug_info_data, 2759 die.GetCU(), 2760 block_offset, 2761 block_length, 2762 eRegisterKindDWARF, 2763 &initialValue, 2764 nullptr, 2765 memberOffset, 2766 nullptr)) 2767 { 2768 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 2769 } 2770 } 2771 else 2772 { 2773 // With DWARF 3 and later, if the value is an integer constant, 2774 // this form value is the offset in bytes from the beginning 2775 // of the containing entity. 2776 member_byte_offset = form_value.Unsigned(); 2777 } 2778 break; 2779 2780 case DW_AT_accessibility: accessibility = DW_ACCESS_to_AccessType (form_value.Unsigned()); break; 2781 case DW_AT_artificial: is_artificial = form_value.Boolean(); break; 2782 case DW_AT_APPLE_property_name: prop_name = form_value.AsCString(); 2783 break; 2784 case DW_AT_APPLE_property_getter: prop_getter_name = form_value.AsCString(); 2785 break; 2786 case DW_AT_APPLE_property_setter: prop_setter_name = form_value.AsCString(); 2787 break; 2788 case DW_AT_APPLE_property_attribute: prop_attributes = form_value.Unsigned(); break; 2789 case DW_AT_external: is_external = form_value.Boolean(); break; 2790 2791 default: 2792 case DW_AT_declaration: 2793 case DW_AT_description: 2794 case DW_AT_mutable: 2795 case DW_AT_visibility: 2796 case DW_AT_sibling: 2797 break; 2798 } 2799 } 2800 } 2801 2802 if (prop_name) 2803 { 2804 ConstString fixed_getter; 2805 ConstString fixed_setter; 2806 2807 // Check if the property getter/setter were provided as full 2808 // names. We want basenames, so we extract them. 2809 2810 if (prop_getter_name && prop_getter_name[0] == '-') 2811 { 2812 ObjCLanguage::MethodName prop_getter_method(prop_getter_name, true); 2813 prop_getter_name = prop_getter_method.GetSelector().GetCString(); 2814 } 2815 2816 if (prop_setter_name && prop_setter_name[0] == '-') 2817 { 2818 ObjCLanguage::MethodName prop_setter_method(prop_setter_name, true); 2819 prop_setter_name = prop_setter_method.GetSelector().GetCString(); 2820 } 2821 2822 // If the names haven't been provided, they need to be 2823 // filled in. 2824 2825 if (!prop_getter_name) 2826 { 2827 prop_getter_name = prop_name; 2828 } 2829 if (!prop_setter_name && prop_name[0] && !(prop_attributes & DW_APPLE_PROPERTY_readonly)) 2830 { 2831 StreamString ss; 2832 2833 ss.Printf("set%c%s:", 2834 toupper(prop_name[0]), 2835 &prop_name[1]); 2836 2837 fixed_setter.SetCString(ss.GetData()); 2838 prop_setter_name = fixed_setter.GetCString(); 2839 } 2840 } 2841 2842 // Clang has a DWARF generation bug where sometimes it 2843 // represents fields that are references with bad byte size 2844 // and bit size/offset information such as: 2845 // 2846 // DW_AT_byte_size( 0x00 ) 2847 // DW_AT_bit_size( 0x40 ) 2848 // DW_AT_bit_offset( 0xffffffffffffffc0 ) 2849 // 2850 // So check the bit offset to make sure it is sane, and if 2851 // the values are not sane, remove them. If we don't do this 2852 // then we will end up with a crash if we try to use this 2853 // type in an expression when clang becomes unhappy with its 2854 // recycled debug info. 2855 2856 if (byte_size == 0 && bit_offset < 0) 2857 { 2858 bit_size = 0; 2859 bit_offset = 0; 2860 } 2861 2862 // FIXME: Make Clang ignore Objective-C accessibility for expressions 2863 if (class_language == eLanguageTypeObjC || 2864 class_language == eLanguageTypeObjC_plus_plus) 2865 accessibility = eAccessNone; 2866 2867 if (member_idx == 0 && !is_artificial && name && (strstr (name, "_vptr$") == name)) 2868 { 2869 // Not all compilers will mark the vtable pointer 2870 // member as artificial (llvm-gcc). We can't have 2871 // the virtual members in our classes otherwise it 2872 // throws off all child offsets since we end up 2873 // having and extra pointer sized member in our 2874 // class layouts. 2875 is_artificial = true; 2876 } 2877 2878 // Handle static members 2879 if (is_external && member_byte_offset == UINT32_MAX) 2880 { 2881 Type *var_type = die.ResolveTypeUID(DIERef(encoding_form)); 2882 2883 if (var_type) 2884 { 2885 if (accessibility == eAccessNone) 2886 accessibility = eAccessPublic; 2887 ClangASTContext::AddVariableToRecordType (class_clang_type, 2888 name, 2889 var_type->GetLayoutCompilerType (), 2890 accessibility); 2891 } 2892 break; 2893 } 2894 2895 if (is_artificial == false) 2896 { 2897 Type *member_type = die.ResolveTypeUID(DIERef(encoding_form)); 2898 2899 clang::FieldDecl *field_decl = NULL; 2900 if (tag == DW_TAG_member) 2901 { 2902 if (member_type) 2903 { 2904 if (accessibility == eAccessNone) 2905 accessibility = default_accessibility; 2906 member_accessibilities.push_back(accessibility); 2907 2908 uint64_t field_bit_offset = (member_byte_offset == UINT32_MAX ? 0 : (member_byte_offset * 8)); 2909 if (bit_size > 0) 2910 { 2911 2912 BitfieldInfo this_field_info; 2913 this_field_info.bit_offset = field_bit_offset; 2914 this_field_info.bit_size = bit_size; 2915 2916 ///////////////////////////////////////////////////////////// 2917 // How to locate a field given the DWARF debug information 2918 // 2919 // AT_byte_size indicates the size of the word in which the 2920 // bit offset must be interpreted. 2921 // 2922 // AT_data_member_location indicates the byte offset of the 2923 // word from the base address of the structure. 2924 // 2925 // AT_bit_offset indicates how many bits into the word 2926 // (according to the host endianness) the low-order bit of 2927 // the field starts. AT_bit_offset can be negative. 2928 // 2929 // AT_bit_size indicates the size of the field in bits. 2930 ///////////////////////////////////////////////////////////// 2931 2932 if (byte_size == 0) 2933 byte_size = member_type->GetByteSize(); 2934 2935 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 2936 if (objfile->GetByteOrder() == eByteOrderLittle) 2937 { 2938 this_field_info.bit_offset += byte_size * 8; 2939 this_field_info.bit_offset -= (bit_offset + bit_size); 2940 2941 if (this_field_info.bit_offset >= parent_bit_size) 2942 { 2943 objfile->GetModule()->ReportWarning("0x%8.8" PRIx64 ": %s bitfield named \"%s\" has invalid bit offset (0x%8.8" PRIx64 ") member will be ignored. Please file a bug against the compiler and include the preprocessed output for %s\n", 2944 die.GetID(), 2945 DW_TAG_value_to_name(tag), 2946 name, 2947 this_field_info.bit_offset, 2948 sc.comp_unit ? sc.comp_unit->GetPath().c_str() : "the source file"); 2949 this_field_info.Clear(); 2950 continue; 2951 } 2952 } 2953 else 2954 { 2955 this_field_info.bit_offset += bit_offset; 2956 } 2957 2958 // Update the field bit offset we will report for layout 2959 field_bit_offset = this_field_info.bit_offset; 2960 2961 // If the member to be emitted did not start on a character boundary and there is 2962 // empty space between the last field and this one, then we need to emit an 2963 // anonymous member filling up the space up to its start. There are three cases 2964 // here: 2965 // 2966 // 1 If the previous member ended on a character boundary, then we can emit an 2967 // anonymous member starting at the most recent character boundary. 2968 // 2969 // 2 If the previous member did not end on a character boundary and the distance 2970 // from the end of the previous member to the current member is less than a 2971 // word width, then we can emit an anonymous member starting right after the 2972 // previous member and right before this member. 2973 // 2974 // 3 If the previous member did not end on a character boundary and the distance 2975 // from the end of the previous member to the current member is greater than 2976 // or equal a word width, then we act as in Case 1. 2977 2978 const uint64_t character_width = 8; 2979 const uint64_t word_width = 32; 2980 2981 // Objective-C has invalid DW_AT_bit_offset values in older versions 2982 // of clang, so we have to be careful and only insert unnamed bitfields 2983 // if we have a new enough clang. 2984 bool detect_unnamed_bitfields = true; 2985 2986 if (class_language == eLanguageTypeObjC || class_language == eLanguageTypeObjC_plus_plus) 2987 detect_unnamed_bitfields = die.GetCU()->Supports_unnamed_objc_bitfields (); 2988 2989 if (detect_unnamed_bitfields) 2990 { 2991 BitfieldInfo anon_field_info; 2992 2993 if ((this_field_info.bit_offset % character_width) != 0) // not char aligned 2994 { 2995 uint64_t last_field_end = 0; 2996 2997 if (last_field_info.IsValid()) 2998 last_field_end = last_field_info.bit_offset + last_field_info.bit_size; 2999 3000 if (this_field_info.bit_offset != last_field_end) 3001 { 3002 if (((last_field_end % character_width) == 0) || // case 1 3003 (this_field_info.bit_offset - last_field_end >= word_width)) // case 3 3004 { 3005 anon_field_info.bit_size = this_field_info.bit_offset % character_width; 3006 anon_field_info.bit_offset = this_field_info.bit_offset - anon_field_info.bit_size; 3007 } 3008 else // case 2 3009 { 3010 anon_field_info.bit_size = this_field_info.bit_offset - last_field_end; 3011 anon_field_info.bit_offset = last_field_end; 3012 } 3013 } 3014 } 3015 3016 if (anon_field_info.IsValid()) 3017 { 3018 clang::FieldDecl *unnamed_bitfield_decl = 3019 ClangASTContext::AddFieldToRecordType (class_clang_type, 3020 NULL, 3021 m_ast.GetBuiltinTypeForEncodingAndBitSize(eEncodingSint, word_width), 3022 accessibility, 3023 anon_field_info.bit_size); 3024 3025 layout_info.field_offsets.insert( 3026 std::make_pair(unnamed_bitfield_decl, anon_field_info.bit_offset)); 3027 } 3028 } 3029 last_field_info = this_field_info; 3030 } 3031 else 3032 { 3033 last_field_info.Clear(); 3034 } 3035 3036 CompilerType member_clang_type = member_type->GetLayoutCompilerType (); 3037 if (!member_clang_type.IsCompleteType()) 3038 member_clang_type.GetCompleteType(); 3039 3040 { 3041 // Older versions of clang emit array[0] and array[1] in the same way (<rdar://problem/12566646>). 3042 // If the current field is at the end of the structure, then there is definitely no room for extra 3043 // elements and we override the type to array[0]. 3044 3045 CompilerType member_array_element_type; 3046 uint64_t member_array_size; 3047 bool member_array_is_incomplete; 3048 3049 if (member_clang_type.IsArrayType(&member_array_element_type, 3050 &member_array_size, 3051 &member_array_is_incomplete) && 3052 !member_array_is_incomplete) 3053 { 3054 uint64_t parent_byte_size = parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, UINT64_MAX); 3055 3056 if (member_byte_offset >= parent_byte_size) 3057 { 3058 if (member_array_size != 1 && (member_array_size != 0 || member_byte_offset > parent_byte_size)) 3059 { 3060 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, 3061 die.GetID(), 3062 name, 3063 encoding_form.Reference(), 3064 parent_die.GetID()); 3065 } 3066 3067 member_clang_type = m_ast.CreateArrayType(member_array_element_type, 0, false); 3068 } 3069 } 3070 } 3071 3072 if (ClangASTContext::IsCXXClassType(member_clang_type) && member_clang_type.GetCompleteType() == false) 3073 { 3074 if (die.GetCU()->GetProducer() == DWARFCompileUnit::eProducerClang) 3075 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", 3076 parent_die.GetOffset(), 3077 parent_die.GetName(), 3078 die.GetOffset(), 3079 name); 3080 else 3081 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", 3082 parent_die.GetOffset(), 3083 parent_die.GetName(), 3084 die.GetOffset(), 3085 name, 3086 sc.comp_unit ? sc.comp_unit->GetPath().c_str() : "the source file"); 3087 // We have no choice other than to pretend that the member class 3088 // is complete. If we don't do this, clang will crash when trying 3089 // to layout the class. Since we provide layout assistance, all 3090 // ivars in this class and other classes will be fine, this is 3091 // the best we can do short of crashing. 3092 ClangASTContext::StartTagDeclarationDefinition(member_clang_type); 3093 ClangASTContext::CompleteTagDeclarationDefinition(member_clang_type); 3094 } 3095 3096 field_decl = ClangASTContext::AddFieldToRecordType (class_clang_type, 3097 name, 3098 member_clang_type, 3099 accessibility, 3100 bit_size); 3101 3102 m_ast.SetMetadataAsUserID (field_decl, die.GetID()); 3103 3104 layout_info.field_offsets.insert(std::make_pair(field_decl, field_bit_offset)); 3105 } 3106 else 3107 { 3108 if (name) 3109 module_sp->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 " which was unable to be parsed", 3110 die.GetID(), 3111 name, 3112 encoding_form.Reference()); 3113 else 3114 module_sp->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member refers to type 0x%8.8" PRIx64 " which was unable to be parsed", 3115 die.GetID(), 3116 encoding_form.Reference()); 3117 } 3118 } 3119 3120 if (prop_name != NULL && member_type) 3121 { 3122 clang::ObjCIvarDecl *ivar_decl = NULL; 3123 3124 if (field_decl) 3125 { 3126 ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl); 3127 assert (ivar_decl != NULL); 3128 } 3129 3130 ClangASTMetadata metadata; 3131 metadata.SetUserID (die.GetID()); 3132 delayed_properties.push_back(DelayedAddObjCClassProperty(class_clang_type, 3133 prop_name, 3134 member_type->GetLayoutCompilerType (), 3135 ivar_decl, 3136 prop_setter_name, 3137 prop_getter_name, 3138 prop_attributes, 3139 &metadata)); 3140 3141 if (ivar_decl) 3142 m_ast.SetMetadataAsUserID (ivar_decl, die.GetID()); 3143 } 3144 } 3145 } 3146 ++member_idx; 3147 } 3148 break; 3149 3150 case DW_TAG_subprogram: 3151 // Let the type parsing code handle this one for us. 3152 member_function_dies.Append (die); 3153 break; 3154 3155 case DW_TAG_inheritance: 3156 { 3157 is_a_class = true; 3158 if (default_accessibility == eAccessNone) 3159 default_accessibility = eAccessPrivate; 3160 // TODO: implement DW_TAG_inheritance type parsing 3161 DWARFAttributes attributes; 3162 const size_t num_attributes = die.GetAttributes (attributes); 3163 if (num_attributes > 0) 3164 { 3165 Declaration decl; 3166 DWARFExpression location(die.GetCU()); 3167 DWARFFormValue encoding_form; 3168 AccessType accessibility = default_accessibility; 3169 bool is_virtual = false; 3170 bool is_base_of_class = true; 3171 off_t member_byte_offset = 0; 3172 uint32_t i; 3173 for (i=0; i<num_attributes; ++i) 3174 { 3175 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3176 DWARFFormValue form_value; 3177 if (attributes.ExtractFormValueAtIndex(i, form_value)) 3178 { 3179 switch (attr) 3180 { 3181 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 3182 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 3183 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 3184 case DW_AT_type: encoding_form = form_value; break; 3185 case DW_AT_data_member_location: 3186 if (form_value.BlockData()) 3187 { 3188 Value initialValue(0); 3189 Value memberOffset(0); 3190 const DWARFDataExtractor& debug_info_data = die.GetDWARF()->get_debug_info_data(); 3191 uint32_t block_length = form_value.Unsigned(); 3192 uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart(); 3193 if (DWARFExpression::Evaluate (nullptr, 3194 nullptr, 3195 nullptr, 3196 nullptr, 3197 module_sp, 3198 debug_info_data, 3199 die.GetCU(), 3200 block_offset, 3201 block_length, 3202 eRegisterKindDWARF, 3203 &initialValue, 3204 nullptr, 3205 memberOffset, 3206 nullptr)) 3207 { 3208 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 3209 } 3210 } 3211 else 3212 { 3213 // With DWARF 3 and later, if the value is an integer constant, 3214 // this form value is the offset in bytes from the beginning 3215 // of the containing entity. 3216 member_byte_offset = form_value.Unsigned(); 3217 } 3218 break; 3219 3220 case DW_AT_accessibility: 3221 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 3222 break; 3223 3224 case DW_AT_virtuality: 3225 is_virtual = form_value.Boolean(); 3226 break; 3227 3228 case DW_AT_sibling: 3229 break; 3230 3231 default: 3232 break; 3233 } 3234 } 3235 } 3236 3237 Type *base_class_type = die.ResolveTypeUID(DIERef(encoding_form)); 3238 if (base_class_type == NULL) 3239 { 3240 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", 3241 die.GetOffset(), 3242 encoding_form.Reference(), 3243 parent_die.GetOffset()); 3244 break; 3245 } 3246 3247 CompilerType base_class_clang_type = base_class_type->GetFullCompilerType (); 3248 assert (base_class_clang_type); 3249 if (class_language == eLanguageTypeObjC) 3250 { 3251 ast->SetObjCSuperClass(class_clang_type, base_class_clang_type); 3252 } 3253 else 3254 { 3255 base_classes.push_back (ast->CreateBaseClassSpecifier (base_class_clang_type.GetOpaqueQualType(), 3256 accessibility, 3257 is_virtual, 3258 is_base_of_class)); 3259 3260 if (is_virtual) 3261 { 3262 // Do not specify any offset for virtual inheritance. The DWARF produced by clang doesn't 3263 // give us a constant offset, but gives us a DWARF expressions that requires an actual object 3264 // in memory. the DW_AT_data_member_location for a virtual base class looks like: 3265 // DW_AT_data_member_location( DW_OP_dup, DW_OP_deref, DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref, DW_OP_plus ) 3266 // Given this, there is really no valid response we can give to clang for virtual base 3267 // class offsets, and this should eventually be removed from LayoutRecordType() in the external 3268 // AST source in clang. 3269 } 3270 else 3271 { 3272 layout_info.base_offsets.insert( 3273 std::make_pair(ast->GetAsCXXRecordDecl(base_class_clang_type.GetOpaqueQualType()), 3274 clang::CharUnits::fromQuantity(member_byte_offset))); 3275 } 3276 } 3277 } 3278 } 3279 break; 3280 3281 default: 3282 break; 3283 } 3284 } 3285 3286 return true; 3287 } 3288 3289 3290 size_t 3291 DWARFASTParserClang::ParseChildParameters (const SymbolContext& sc, 3292 clang::DeclContext *containing_decl_ctx, 3293 const DWARFDIE &parent_die, 3294 bool skip_artificial, 3295 bool &is_static, 3296 bool &is_variadic, 3297 bool &has_template_params, 3298 std::vector<CompilerType>& function_param_types, 3299 std::vector<clang::ParmVarDecl*>& function_param_decls, 3300 unsigned &type_quals) 3301 { 3302 if (!parent_die) 3303 return 0; 3304 3305 size_t arg_idx = 0; 3306 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); die = die.GetSibling()) 3307 { 3308 const dw_tag_t tag = die.Tag(); 3309 switch (tag) 3310 { 3311 case DW_TAG_formal_parameter: 3312 { 3313 DWARFAttributes attributes; 3314 const size_t num_attributes = die.GetAttributes(attributes); 3315 if (num_attributes > 0) 3316 { 3317 const char *name = NULL; 3318 Declaration decl; 3319 DWARFFormValue param_type_die_form; 3320 bool is_artificial = false; 3321 // one of None, Auto, Register, Extern, Static, PrivateExtern 3322 3323 clang::StorageClass storage = clang::SC_None; 3324 uint32_t i; 3325 for (i=0; i<num_attributes; ++i) 3326 { 3327 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3328 DWARFFormValue form_value; 3329 if (attributes.ExtractFormValueAtIndex(i, form_value)) 3330 { 3331 switch (attr) 3332 { 3333 case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break; 3334 case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break; 3335 case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break; 3336 case DW_AT_name: name = form_value.AsCString(); 3337 break; 3338 case DW_AT_type: param_type_die_form = form_value; break; 3339 case DW_AT_artificial: is_artificial = form_value.Boolean(); break; 3340 case DW_AT_location: 3341 // if (form_value.BlockData()) 3342 // { 3343 // const DWARFDataExtractor& debug_info_data = debug_info(); 3344 // uint32_t block_length = form_value.Unsigned(); 3345 // DWARFDataExtractor location(debug_info_data, form_value.BlockData() - debug_info_data.GetDataStart(), block_length); 3346 // } 3347 // else 3348 // { 3349 // } 3350 // break; 3351 case DW_AT_const_value: 3352 case DW_AT_default_value: 3353 case DW_AT_description: 3354 case DW_AT_endianity: 3355 case DW_AT_is_optional: 3356 case DW_AT_segment: 3357 case DW_AT_variable_parameter: 3358 default: 3359 case DW_AT_abstract_origin: 3360 case DW_AT_sibling: 3361 break; 3362 } 3363 } 3364 } 3365 3366 bool skip = false; 3367 if (skip_artificial) 3368 { 3369 if (is_artificial) 3370 { 3371 // In order to determine if a C++ member function is 3372 // "const" we have to look at the const-ness of "this"... 3373 // Ugly, but that 3374 if (arg_idx == 0) 3375 { 3376 if (DeclKindIsCXXClass(containing_decl_ctx->getDeclKind())) 3377 { 3378 // Often times compilers omit the "this" name for the 3379 // specification DIEs, so we can't rely upon the name 3380 // being in the formal parameter DIE... 3381 if (name == NULL || ::strcmp(name, "this")==0) 3382 { 3383 Type *this_type = die.ResolveTypeUID (DIERef(param_type_die_form)); 3384 if (this_type) 3385 { 3386 uint32_t encoding_mask = this_type->GetEncodingMask(); 3387 if (encoding_mask & Type::eEncodingIsPointerUID) 3388 { 3389 is_static = false; 3390 3391 if (encoding_mask & (1u << Type::eEncodingIsConstUID)) 3392 type_quals |= clang::Qualifiers::Const; 3393 if (encoding_mask & (1u << Type::eEncodingIsVolatileUID)) 3394 type_quals |= clang::Qualifiers::Volatile; 3395 } 3396 } 3397 } 3398 } 3399 } 3400 skip = true; 3401 } 3402 else 3403 { 3404 3405 // HACK: Objective C formal parameters "self" and "_cmd" 3406 // are not marked as artificial in the DWARF... 3407 CompileUnit *comp_unit = die.GetLLDBCompileUnit(); 3408 if (comp_unit) 3409 { 3410 switch (comp_unit->GetLanguage()) 3411 { 3412 case eLanguageTypeObjC: 3413 case eLanguageTypeObjC_plus_plus: 3414 if (name && name[0] && (strcmp (name, "self") == 0 || strcmp (name, "_cmd") == 0)) 3415 skip = true; 3416 break; 3417 default: 3418 break; 3419 } 3420 } 3421 } 3422 } 3423 3424 if (!skip) 3425 { 3426 Type *type = die.ResolveTypeUID(DIERef(param_type_die_form)); 3427 if (type) 3428 { 3429 function_param_types.push_back (type->GetForwardCompilerType ()); 3430 3431 clang::ParmVarDecl *param_var_decl = m_ast.CreateParameterDeclaration (name, 3432 type->GetForwardCompilerType (), 3433 storage); 3434 assert(param_var_decl); 3435 function_param_decls.push_back(param_var_decl); 3436 3437 m_ast.SetMetadataAsUserID (param_var_decl, die.GetID()); 3438 } 3439 } 3440 } 3441 arg_idx++; 3442 } 3443 break; 3444 3445 case DW_TAG_unspecified_parameters: 3446 is_variadic = true; 3447 break; 3448 3449 case DW_TAG_template_type_parameter: 3450 case DW_TAG_template_value_parameter: 3451 // The one caller of this was never using the template_param_infos, 3452 // and the local variable was taking up a large amount of stack space 3453 // in SymbolFileDWARF::ParseType() so this was removed. If we ever need 3454 // the template params back, we can add them back. 3455 // ParseTemplateDIE (dwarf_cu, die, template_param_infos); 3456 has_template_params = true; 3457 break; 3458 3459 default: 3460 break; 3461 } 3462 } 3463 return arg_idx; 3464 } 3465 3466 void 3467 DWARFASTParserClang::ParseChildArrayInfo (const SymbolContext& sc, 3468 const DWARFDIE &parent_die, 3469 int64_t& first_index, 3470 std::vector<uint64_t>& element_orders, 3471 uint32_t& byte_stride, 3472 uint32_t& bit_stride) 3473 { 3474 if (!parent_die) 3475 return; 3476 3477 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); die = die.GetSibling()) 3478 { 3479 const dw_tag_t tag = die.Tag(); 3480 switch (tag) 3481 { 3482 case DW_TAG_subrange_type: 3483 { 3484 DWARFAttributes attributes; 3485 const size_t num_child_attributes = die.GetAttributes(attributes); 3486 if (num_child_attributes > 0) 3487 { 3488 uint64_t num_elements = 0; 3489 uint64_t lower_bound = 0; 3490 uint64_t upper_bound = 0; 3491 bool upper_bound_valid = false; 3492 uint32_t i; 3493 for (i=0; i<num_child_attributes; ++i) 3494 { 3495 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3496 DWARFFormValue form_value; 3497 if (attributes.ExtractFormValueAtIndex(i, form_value)) 3498 { 3499 switch (attr) 3500 { 3501 case DW_AT_name: 3502 break; 3503 3504 case DW_AT_count: 3505 num_elements = form_value.Unsigned(); 3506 break; 3507 3508 case DW_AT_bit_stride: 3509 bit_stride = form_value.Unsigned(); 3510 break; 3511 3512 case DW_AT_byte_stride: 3513 byte_stride = form_value.Unsigned(); 3514 break; 3515 3516 case DW_AT_lower_bound: 3517 lower_bound = form_value.Unsigned(); 3518 break; 3519 3520 case DW_AT_upper_bound: 3521 upper_bound_valid = true; 3522 upper_bound = form_value.Unsigned(); 3523 break; 3524 3525 default: 3526 case DW_AT_abstract_origin: 3527 case DW_AT_accessibility: 3528 case DW_AT_allocated: 3529 case DW_AT_associated: 3530 case DW_AT_data_location: 3531 case DW_AT_declaration: 3532 case DW_AT_description: 3533 case DW_AT_sibling: 3534 case DW_AT_threads_scaled: 3535 case DW_AT_type: 3536 case DW_AT_visibility: 3537 break; 3538 } 3539 } 3540 } 3541 3542 if (num_elements == 0) 3543 { 3544 if (upper_bound_valid && upper_bound >= lower_bound) 3545 num_elements = upper_bound - lower_bound + 1; 3546 } 3547 3548 element_orders.push_back (num_elements); 3549 } 3550 } 3551 break; 3552 } 3553 } 3554 } 3555 3556 Type * 3557 DWARFASTParserClang::GetTypeForDIE (const DWARFDIE &die) 3558 { 3559 if (die) 3560 { 3561 SymbolFileDWARF *dwarf = die.GetDWARF(); 3562 DWARFAttributes attributes; 3563 const size_t num_attributes = die.GetAttributes(attributes); 3564 if (num_attributes > 0) 3565 { 3566 DWARFFormValue type_die_form; 3567 for (size_t i = 0; i < num_attributes; ++i) 3568 { 3569 dw_attr_t attr = attributes.AttributeAtIndex(i); 3570 DWARFFormValue form_value; 3571 3572 if (attr == DW_AT_type && attributes.ExtractFormValueAtIndex(i, form_value)) 3573 return dwarf->ResolveTypeUID(dwarf->GetDIE (DIERef(form_value)), true); 3574 } 3575 } 3576 } 3577 3578 return nullptr; 3579 } 3580 3581 clang::Decl * 3582 DWARFASTParserClang::GetClangDeclForDIE (const DWARFDIE &die) 3583 { 3584 if (!die) 3585 return nullptr; 3586 3587 switch (die.Tag()) 3588 { 3589 case DW_TAG_variable: 3590 case DW_TAG_constant: 3591 case DW_TAG_formal_parameter: 3592 case DW_TAG_imported_declaration: 3593 case DW_TAG_imported_module: 3594 break; 3595 default: 3596 return nullptr; 3597 } 3598 3599 DIEToDeclMap::iterator cache_pos = m_die_to_decl.find(die.GetDIE()); 3600 if (cache_pos != m_die_to_decl.end()) 3601 return cache_pos->second; 3602 3603 if (DWARFDIE spec_die = die.GetReferencedDIE(DW_AT_specification)) 3604 { 3605 clang::Decl *decl = GetClangDeclForDIE(spec_die); 3606 m_die_to_decl[die.GetDIE()] = decl; 3607 m_decl_to_die[decl].insert(die.GetDIE()); 3608 return decl; 3609 } 3610 3611 if (DWARFDIE abstract_origin_die = die.GetReferencedDIE(DW_AT_abstract_origin)) 3612 { 3613 clang::Decl *decl = GetClangDeclForDIE(abstract_origin_die); 3614 m_die_to_decl[die.GetDIE()] = decl; 3615 m_decl_to_die[decl].insert(die.GetDIE()); 3616 return decl; 3617 } 3618 3619 clang::Decl *decl = nullptr; 3620 switch (die.Tag()) 3621 { 3622 case DW_TAG_variable: 3623 case DW_TAG_constant: 3624 case DW_TAG_formal_parameter: 3625 { 3626 SymbolFileDWARF *dwarf = die.GetDWARF(); 3627 Type *type = GetTypeForDIE(die); 3628 if (dwarf && type) 3629 { 3630 const char *name = die.GetName(); 3631 clang::DeclContext *decl_context = 3632 ClangASTContext::DeclContextGetAsDeclContext(dwarf->GetDeclContextContainingUID(die.GetID())); 3633 decl = m_ast.CreateVariableDeclaration(decl_context, name, 3634 ClangUtil::GetQualType(type->GetForwardCompilerType())); 3635 } 3636 break; 3637 } 3638 case DW_TAG_imported_declaration: 3639 { 3640 SymbolFileDWARF *dwarf = die.GetDWARF(); 3641 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3642 if (imported_uid) 3643 { 3644 CompilerDecl imported_decl = imported_uid.GetDecl(); 3645 if (imported_decl) 3646 { 3647 clang::DeclContext *decl_context = ClangASTContext::DeclContextGetAsDeclContext(dwarf->GetDeclContextContainingUID(die.GetID())); 3648 if (clang::NamedDecl *clang_imported_decl = llvm::dyn_cast<clang::NamedDecl>((clang::Decl *)imported_decl.GetOpaqueDecl())) 3649 decl = m_ast.CreateUsingDeclaration(decl_context, clang_imported_decl); 3650 } 3651 } 3652 break; 3653 } 3654 case DW_TAG_imported_module: 3655 { 3656 SymbolFileDWARF *dwarf = die.GetDWARF(); 3657 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3658 3659 if (imported_uid) 3660 { 3661 CompilerDeclContext imported_decl_ctx = imported_uid.GetDeclContext(); 3662 if (imported_decl_ctx) 3663 { 3664 clang::DeclContext *decl_context = ClangASTContext::DeclContextGetAsDeclContext(dwarf->GetDeclContextContainingUID(die.GetID())); 3665 if (clang::NamespaceDecl *ns_decl = ClangASTContext::DeclContextGetAsNamespaceDecl(imported_decl_ctx)) 3666 decl = m_ast.CreateUsingDirectiveDeclaration(decl_context, ns_decl); 3667 } 3668 } 3669 break; 3670 } 3671 default: 3672 break; 3673 } 3674 3675 m_die_to_decl[die.GetDIE()] = decl; 3676 m_decl_to_die[decl].insert(die.GetDIE()); 3677 3678 return decl; 3679 } 3680 3681 clang::DeclContext * 3682 DWARFASTParserClang::GetClangDeclContextForDIE (const DWARFDIE &die) 3683 { 3684 if (die) 3685 { 3686 clang::DeclContext *decl_ctx = GetCachedClangDeclContextForDIE (die); 3687 if (decl_ctx) 3688 return decl_ctx; 3689 3690 bool try_parsing_type = true; 3691 switch (die.Tag()) 3692 { 3693 case DW_TAG_compile_unit: 3694 decl_ctx = m_ast.GetTranslationUnitDecl(); 3695 try_parsing_type = false; 3696 break; 3697 3698 case DW_TAG_namespace: 3699 decl_ctx = ResolveNamespaceDIE (die); 3700 try_parsing_type = false; 3701 break; 3702 3703 case DW_TAG_lexical_block: 3704 decl_ctx = (clang::DeclContext *)ResolveBlockDIE(die); 3705 try_parsing_type = false; 3706 break; 3707 3708 default: 3709 break; 3710 } 3711 3712 if (decl_ctx == nullptr && try_parsing_type) 3713 { 3714 Type* type = die.GetDWARF()->ResolveType (die); 3715 if (type) 3716 decl_ctx = GetCachedClangDeclContextForDIE (die); 3717 } 3718 3719 if (decl_ctx) 3720 { 3721 LinkDeclContextToDIE (decl_ctx, die); 3722 return decl_ctx; 3723 } 3724 } 3725 return nullptr; 3726 } 3727 3728 clang::BlockDecl * 3729 DWARFASTParserClang::ResolveBlockDIE (const DWARFDIE &die) 3730 { 3731 if (die && die.Tag() == DW_TAG_lexical_block) 3732 { 3733 clang::BlockDecl *decl = llvm::cast_or_null<clang::BlockDecl>(m_die_to_decl_ctx[die.GetDIE()]); 3734 3735 if (!decl) 3736 { 3737 DWARFDIE decl_context_die; 3738 clang::DeclContext *decl_context = GetClangDeclContextContainingDIE(die, &decl_context_die); 3739 decl = m_ast.CreateBlockDeclaration(decl_context); 3740 3741 if (decl) 3742 LinkDeclContextToDIE((clang::DeclContext *)decl, die); 3743 } 3744 3745 return decl; 3746 } 3747 return nullptr; 3748 } 3749 3750 clang::NamespaceDecl * 3751 DWARFASTParserClang::ResolveNamespaceDIE (const DWARFDIE &die) 3752 { 3753 if (die && die.Tag() == DW_TAG_namespace) 3754 { 3755 // See if we already parsed this namespace DIE and associated it with a 3756 // uniqued namespace declaration 3757 clang::NamespaceDecl *namespace_decl = static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die.GetDIE()]); 3758 if (namespace_decl) 3759 return namespace_decl; 3760 else 3761 { 3762 const char *namespace_name = die.GetName(); 3763 clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (die, nullptr); 3764 namespace_decl = m_ast.GetUniqueNamespaceDeclaration (namespace_name, containing_decl_ctx); 3765 Log *log = nullptr;// (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 3766 if (log) 3767 { 3768 SymbolFileDWARF *dwarf = die.GetDWARF(); 3769 if (namespace_name) 3770 { 3771 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 3772 "ASTContext => %p: 0x%8.8" PRIx64 ": DW_TAG_namespace with DW_AT_name(\"%s\") => clang::NamespaceDecl *%p (original = %p)", 3773 static_cast<void*>(m_ast.getASTContext()), 3774 die.GetID(), 3775 namespace_name, 3776 static_cast<void*>(namespace_decl), 3777 static_cast<void*>(namespace_decl->getOriginalNamespace())); 3778 } 3779 else 3780 { 3781 dwarf->GetObjectFile()->GetModule()->LogMessage (log, 3782 "ASTContext => %p: 0x%8.8" PRIx64 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p (original = %p)", 3783 static_cast<void*>(m_ast.getASTContext()), 3784 die.GetID(), 3785 static_cast<void*>(namespace_decl), 3786 static_cast<void*>(namespace_decl->getOriginalNamespace())); 3787 } 3788 } 3789 3790 if (namespace_decl) 3791 LinkDeclContextToDIE((clang::DeclContext*)namespace_decl, die); 3792 return namespace_decl; 3793 } 3794 } 3795 return nullptr; 3796 } 3797 3798 clang::DeclContext * 3799 DWARFASTParserClang::GetClangDeclContextContainingDIE (const DWARFDIE &die, 3800 DWARFDIE *decl_ctx_die_copy) 3801 { 3802 SymbolFileDWARF *dwarf = die.GetDWARF(); 3803 3804 DWARFDIE decl_ctx_die = dwarf->GetDeclContextDIEContainingDIE (die); 3805 3806 if (decl_ctx_die_copy) 3807 *decl_ctx_die_copy = decl_ctx_die; 3808 3809 if (decl_ctx_die) 3810 { 3811 clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE (decl_ctx_die); 3812 if (clang_decl_ctx) 3813 return clang_decl_ctx; 3814 } 3815 return m_ast.GetTranslationUnitDecl(); 3816 } 3817 3818 clang::DeclContext * 3819 DWARFASTParserClang::GetCachedClangDeclContextForDIE (const DWARFDIE &die) 3820 { 3821 if (die) 3822 { 3823 DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find(die.GetDIE()); 3824 if (pos != m_die_to_decl_ctx.end()) 3825 return pos->second; 3826 } 3827 return nullptr; 3828 } 3829 3830 void 3831 DWARFASTParserClang::LinkDeclContextToDIE (clang::DeclContext *decl_ctx, const DWARFDIE &die) 3832 { 3833 m_die_to_decl_ctx[die.GetDIE()] = decl_ctx; 3834 // There can be many DIEs for a single decl context 3835 //m_decl_ctx_to_die[decl_ctx].insert(die.GetDIE()); 3836 m_decl_ctx_to_die.insert(std::make_pair(decl_ctx, die)); 3837 } 3838 3839 bool 3840 DWARFASTParserClang::CopyUniqueClassMethodTypes (const DWARFDIE &src_class_die, 3841 const DWARFDIE &dst_class_die, 3842 lldb_private::Type *class_type, 3843 DWARFDIECollection &failures) 3844 { 3845 if (!class_type || !src_class_die || !dst_class_die) 3846 return false; 3847 if (src_class_die.Tag() != dst_class_die.Tag()) 3848 return false; 3849 3850 // We need to complete the class type so we can get all of the method types 3851 // parsed so we can then unique those types to their equivalent counterparts 3852 // in "dst_cu" and "dst_class_die" 3853 class_type->GetFullCompilerType (); 3854 3855 DWARFDIE src_die; 3856 DWARFDIE dst_die; 3857 UniqueCStringMap<DWARFDIE> src_name_to_die; 3858 UniqueCStringMap<DWARFDIE> dst_name_to_die; 3859 UniqueCStringMap<DWARFDIE> src_name_to_die_artificial; 3860 UniqueCStringMap<DWARFDIE> dst_name_to_die_artificial; 3861 for (src_die = src_class_die.GetFirstChild(); src_die.IsValid(); src_die = src_die.GetSibling()) 3862 { 3863 if (src_die.Tag() == DW_TAG_subprogram) 3864 { 3865 // Make sure this is a declaration and not a concrete instance by looking 3866 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3867 // are placed inside the class definitions and shouldn't be included in 3868 // the list of things are are tracking here. 3869 if (src_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) 3870 { 3871 const char *src_name = src_die.GetMangledName (); 3872 if (src_name) 3873 { 3874 ConstString src_const_name(src_name); 3875 if (src_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3876 src_name_to_die_artificial.Append(src_const_name.GetCString(), src_die); 3877 else 3878 src_name_to_die.Append(src_const_name.GetCString(), src_die); 3879 } 3880 } 3881 } 3882 } 3883 for (dst_die = dst_class_die.GetFirstChild(); dst_die.IsValid(); dst_die = dst_die.GetSibling()) 3884 { 3885 if (dst_die.Tag() == DW_TAG_subprogram) 3886 { 3887 // Make sure this is a declaration and not a concrete instance by looking 3888 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3889 // are placed inside the class definitions and shouldn't be included in 3890 // the list of things are are tracking here. 3891 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) 3892 { 3893 const char *dst_name = dst_die.GetMangledName (); 3894 if (dst_name) 3895 { 3896 ConstString dst_const_name(dst_name); 3897 if ( dst_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3898 dst_name_to_die_artificial.Append(dst_const_name.GetCString(), dst_die); 3899 else 3900 dst_name_to_die.Append(dst_const_name.GetCString(), dst_die); 3901 } 3902 } 3903 } 3904 } 3905 const uint32_t src_size = src_name_to_die.GetSize (); 3906 const uint32_t dst_size = dst_name_to_die.GetSize (); 3907 Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | DWARF_LOG_TYPE_COMPLETION)); 3908 3909 // Is everything kosher so we can go through the members at top speed? 3910 bool fast_path = true; 3911 3912 if (src_size != dst_size) 3913 { 3914 if (src_size != 0 && dst_size != 0) 3915 { 3916 if (log) 3917 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)", 3918 src_class_die.GetOffset(), 3919 dst_class_die.GetOffset(), 3920 src_size, 3921 dst_size); 3922 } 3923 3924 fast_path = false; 3925 } 3926 3927 uint32_t idx; 3928 3929 if (fast_path) 3930 { 3931 for (idx = 0; idx < src_size; ++idx) 3932 { 3933 src_die = src_name_to_die.GetValueAtIndexUnchecked (idx); 3934 dst_die = dst_name_to_die.GetValueAtIndexUnchecked (idx); 3935 3936 if (src_die.Tag() != dst_die.Tag()) 3937 { 3938 if (log) 3939 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)", 3940 src_class_die.GetOffset(), 3941 dst_class_die.GetOffset(), 3942 src_die.GetOffset(), 3943 src_die.GetTagAsCString(), 3944 dst_die.GetOffset(), 3945 dst_die.GetTagAsCString()); 3946 fast_path = false; 3947 } 3948 3949 const char *src_name = src_die.GetMangledName (); 3950 const char *dst_name = dst_die.GetMangledName (); 3951 3952 // Make sure the names match 3953 if (src_name == dst_name || (strcmp (src_name, dst_name) == 0)) 3954 continue; 3955 3956 if (log) 3957 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)", 3958 src_class_die.GetOffset(), 3959 dst_class_die.GetOffset(), 3960 src_die.GetOffset(), 3961 src_name, 3962 dst_die.GetOffset(), 3963 dst_name); 3964 3965 fast_path = false; 3966 } 3967 } 3968 3969 DWARFASTParserClang *src_dwarf_ast_parser = (DWARFASTParserClang *)src_die.GetDWARFParser(); 3970 DWARFASTParserClang *dst_dwarf_ast_parser = (DWARFASTParserClang *)dst_die.GetDWARFParser(); 3971 3972 // Now do the work of linking the DeclContexts and Types. 3973 if (fast_path) 3974 { 3975 // We can do this quickly. Just run across the tables index-for-index since 3976 // we know each node has matching names and tags. 3977 for (idx = 0; idx < src_size; ++idx) 3978 { 3979 src_die = src_name_to_die.GetValueAtIndexUnchecked (idx); 3980 dst_die = dst_name_to_die.GetValueAtIndexUnchecked (idx); 3981 3982 clang::DeclContext *src_decl_ctx = src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3983 if (src_decl_ctx) 3984 { 3985 if (log) 3986 log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3987 static_cast<void*>(src_decl_ctx), 3988 src_die.GetOffset(), dst_die.GetOffset()); 3989 dst_dwarf_ast_parser->LinkDeclContextToDIE (src_decl_ctx, dst_die); 3990 } 3991 else 3992 { 3993 if (log) 3994 log->Printf ("warning: tried to unique decl context from 0x%8.8x for 0x%8.8x, but none was found", 3995 src_die.GetOffset(), dst_die.GetOffset()); 3996 } 3997 3998 Type *src_child_type = dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3999 if (src_child_type) 4000 { 4001 if (log) 4002 log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 4003 static_cast<void*>(src_child_type), 4004 src_child_type->GetID(), 4005 src_die.GetOffset(), dst_die.GetOffset()); 4006 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 4007 } 4008 else 4009 { 4010 if (log) 4011 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()); 4012 } 4013 } 4014 } 4015 else 4016 { 4017 // We must do this slowly. For each member of the destination, look 4018 // up a member in the source with the same name, check its tag, and 4019 // unique them if everything matches up. Report failures. 4020 4021 if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty()) 4022 { 4023 src_name_to_die.Sort(); 4024 4025 for (idx = 0; idx < dst_size; ++idx) 4026 { 4027 const char *dst_name = dst_name_to_die.GetCStringAtIndex(idx); 4028 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 4029 src_die = src_name_to_die.Find(dst_name, DWARFDIE()); 4030 4031 if (src_die && (src_die.Tag() == dst_die.Tag())) 4032 { 4033 clang::DeclContext *src_decl_ctx = src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4034 if (src_decl_ctx) 4035 { 4036 if (log) 4037 log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4038 static_cast<void*>(src_decl_ctx), 4039 src_die.GetOffset(), 4040 dst_die.GetOffset()); 4041 dst_dwarf_ast_parser->LinkDeclContextToDIE (src_decl_ctx, dst_die); 4042 } 4043 else 4044 { 4045 if (log) 4046 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()); 4047 } 4048 4049 Type *src_child_type = dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4050 if (src_child_type) 4051 { 4052 if (log) 4053 log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 4054 static_cast<void*>(src_child_type), 4055 src_child_type->GetID(), 4056 src_die.GetOffset(), 4057 dst_die.GetOffset()); 4058 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 4059 } 4060 else 4061 { 4062 if (log) 4063 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()); 4064 } 4065 } 4066 else 4067 { 4068 if (log) 4069 log->Printf ("warning: couldn't find a match for 0x%8.8x", dst_die.GetOffset()); 4070 4071 failures.Append(dst_die); 4072 } 4073 } 4074 } 4075 } 4076 4077 const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize (); 4078 const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize (); 4079 4080 if (src_size_artificial && dst_size_artificial) 4081 { 4082 dst_name_to_die_artificial.Sort(); 4083 4084 for (idx = 0; idx < src_size_artificial; ++idx) 4085 { 4086 const char *src_name_artificial = src_name_to_die_artificial.GetCStringAtIndex(idx); 4087 src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked (idx); 4088 dst_die = dst_name_to_die_artificial.Find(src_name_artificial, DWARFDIE()); 4089 4090 if (dst_die) 4091 { 4092 // Both classes have the artificial types, link them 4093 clang::DeclContext *src_decl_ctx = src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4094 if (src_decl_ctx) 4095 { 4096 if (log) 4097 log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4098 static_cast<void*>(src_decl_ctx), 4099 src_die.GetOffset(), dst_die.GetOffset()); 4100 dst_dwarf_ast_parser->LinkDeclContextToDIE (src_decl_ctx, dst_die); 4101 } 4102 else 4103 { 4104 if (log) 4105 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()); 4106 } 4107 4108 Type *src_child_type = dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4109 if (src_child_type) 4110 { 4111 if (log) 4112 log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 4113 static_cast<void*>(src_child_type), 4114 src_child_type->GetID(), 4115 src_die.GetOffset(), dst_die.GetOffset()); 4116 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 4117 } 4118 else 4119 { 4120 if (log) 4121 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()); 4122 } 4123 } 4124 } 4125 } 4126 4127 if (dst_size_artificial) 4128 { 4129 for (idx = 0; idx < dst_size_artificial; ++idx) 4130 { 4131 const char *dst_name_artificial = dst_name_to_die_artificial.GetCStringAtIndex(idx); 4132 dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked (idx); 4133 if (log) 4134 log->Printf ("warning: need to create artificial method for 0x%8.8x for method '%s'", dst_die.GetOffset(), dst_name_artificial); 4135 4136 failures.Append(dst_die); 4137 } 4138 } 4139 4140 return (failures.Size() != 0); 4141 } 4142 4143