1 //===-- DWARFASTParserClang.cpp ---------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include <stdlib.h> 11 12 #include "DWARFASTParserClang.h" 13 #include "DWARFCompileUnit.h" 14 #include "DWARFDIE.h" 15 #include "DWARFDIECollection.h" 16 #include "DWARFDebugInfo.h" 17 #include "DWARFDeclContext.h" 18 #include "DWARFDefines.h" 19 #include "SymbolFileDWARF.h" 20 #include "SymbolFileDWARFDebugMap.h" 21 #include "UniqueDWARFASTType.h" 22 23 #include "Plugins/Language/ObjC/ObjCLanguage.h" 24 #include "lldb/Core/Module.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 #include "lldb/Utility/Log.h" 40 #include "lldb/Utility/StreamString.h" 41 42 #include "clang/AST/DeclCXX.h" 43 #include "clang/AST/DeclObjC.h" 44 45 #include <map> 46 #include <vector> 47 48 //#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN 49 50 #ifdef ENABLE_DEBUG_PRINTF 51 #include <stdio.h> 52 #define DEBUG_PRINTF(fmt, ...) printf(fmt, __VA_ARGS__) 53 #else 54 #define DEBUG_PRINTF(fmt, ...) 55 #endif 56 57 using namespace lldb; 58 using namespace lldb_private; 59 DWARFASTParserClang::DWARFASTParserClang(ClangASTContext &ast) 60 : m_ast(ast), m_die_to_decl_ctx(), m_decl_ctx_to_die() {} 61 62 DWARFASTParserClang::~DWARFASTParserClang() {} 63 64 static AccessType DW_ACCESS_to_AccessType(uint32_t dwarf_accessibility) { 65 switch (dwarf_accessibility) { 66 case DW_ACCESS_public: 67 return eAccessPublic; 68 case DW_ACCESS_private: 69 return eAccessPrivate; 70 case DW_ACCESS_protected: 71 return eAccessProtected; 72 default: 73 break; 74 } 75 return eAccessNone; 76 } 77 78 static bool DeclKindIsCXXClass(clang::Decl::Kind decl_kind) { 79 switch (decl_kind) { 80 case clang::Decl::CXXRecord: 81 case clang::Decl::ClassTemplateSpecialization: 82 return true; 83 default: 84 break; 85 } 86 return false; 87 } 88 89 struct BitfieldInfo { 90 uint64_t bit_size; 91 uint64_t bit_offset; 92 93 BitfieldInfo() 94 : bit_size(LLDB_INVALID_ADDRESS), bit_offset(LLDB_INVALID_ADDRESS) {} 95 96 void Clear() { 97 bit_size = LLDB_INVALID_ADDRESS; 98 bit_offset = LLDB_INVALID_ADDRESS; 99 } 100 101 bool IsValid() const { 102 return (bit_size != LLDB_INVALID_ADDRESS) && 103 (bit_offset != LLDB_INVALID_ADDRESS); 104 } 105 106 bool NextBitfieldOffsetIsValid(const uint64_t next_bit_offset) const { 107 if (IsValid()) { 108 // This bitfield info is valid, so any subsequent bitfields 109 // must not overlap and must be at a higher bit offset than 110 // any previous bitfield + size. 111 return (bit_size + bit_offset) <= next_bit_offset; 112 } else { 113 // If the this BitfieldInfo is not valid, then any offset isOK 114 return true; 115 } 116 } 117 }; 118 119 ClangASTImporter &DWARFASTParserClang::GetClangASTImporter() { 120 if (!m_clang_ast_importer_ap) { 121 m_clang_ast_importer_ap.reset(new ClangASTImporter); 122 } 123 return *m_clang_ast_importer_ap; 124 } 125 126 TypeSP DWARFASTParserClang::ParseTypeFromDWO(const DWARFDIE &die, Log *log) { 127 ModuleSP dwo_module_sp = die.GetContainingDWOModule(); 128 if (dwo_module_sp) { 129 // This type comes from an external DWO module 130 std::vector<CompilerContext> dwo_context; 131 die.GetDWOContext(dwo_context); 132 TypeMap dwo_types; 133 if (dwo_module_sp->GetSymbolVendor()->FindTypes(dwo_context, true, 134 dwo_types)) { 135 const size_t num_dwo_types = dwo_types.GetSize(); 136 if (num_dwo_types == 1) { 137 // We found a real definition for this type elsewhere 138 // so lets use it and cache the fact that we found 139 // a complete type for this die 140 TypeSP dwo_type_sp = dwo_types.GetTypeAtIndex(0); 141 if (dwo_type_sp) { 142 lldb_private::CompilerType dwo_type = 143 dwo_type_sp->GetForwardCompilerType(); 144 145 lldb_private::CompilerType type = 146 GetClangASTImporter().CopyType(m_ast, dwo_type); 147 148 // printf ("copied_qual_type: ast = %p, clang_type = %p, name = 149 // '%s'\n", m_ast, copied_qual_type.getAsOpaquePtr(), 150 // external_type->GetName().GetCString()); 151 if (type) { 152 SymbolFileDWARF *dwarf = die.GetDWARF(); 153 TypeSP type_sp(new Type(die.GetID(), dwarf, dwo_type_sp->GetName(), 154 dwo_type_sp->GetByteSize(), NULL, 155 LLDB_INVALID_UID, Type::eEncodingInvalid, 156 &dwo_type_sp->GetDeclaration(), type, 157 Type::eResolveStateForward)); 158 159 dwarf->GetTypeList()->Insert(type_sp); 160 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 161 clang::TagDecl *tag_decl = ClangASTContext::GetAsTagDecl(type); 162 if (tag_decl) 163 LinkDeclContextToDIE(tag_decl, die); 164 else { 165 clang::DeclContext *defn_decl_ctx = 166 GetCachedClangDeclContextForDIE(die); 167 if (defn_decl_ctx) 168 LinkDeclContextToDIE(defn_decl_ctx, die); 169 } 170 return type_sp; 171 } 172 } 173 } 174 } 175 } 176 return TypeSP(); 177 } 178 179 TypeSP DWARFASTParserClang::ParseTypeFromDWARF(const SymbolContext &sc, 180 const DWARFDIE &die, Log *log, 181 bool *type_is_new_ptr) { 182 TypeSP type_sp; 183 184 if (type_is_new_ptr) 185 *type_is_new_ptr = false; 186 187 AccessType accessibility = eAccessNone; 188 if (die) { 189 SymbolFileDWARF *dwarf = die.GetDWARF(); 190 if (log) { 191 DWARFDIE context_die; 192 clang::DeclContext *context = 193 GetClangDeclContextContainingDIE(die, &context_die); 194 195 dwarf->GetObjectFile()->GetModule()->LogMessage( 196 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x, decl_ctx = %p (die " 197 "0x%8.8x)) %s name = '%s')", 198 die.GetOffset(), static_cast<void *>(context), 199 context_die.GetOffset(), die.GetTagAsCString(), die.GetName()); 200 } 201 // 202 // Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 203 // if (log && dwarf_cu) 204 // { 205 // StreamString s; 206 // die->DumpLocation (this, dwarf_cu, s); 207 // dwarf->GetObjectFile()->GetModule()->LogMessage (log, 208 // "SymbolFileDwarf::%s %s", __FUNCTION__, s.GetData()); 209 // 210 // } 211 212 Type *type_ptr = dwarf->GetDIEToType().lookup(die.GetDIE()); 213 TypeList *type_list = dwarf->GetTypeList(); 214 if (type_ptr == NULL) { 215 if (type_is_new_ptr) 216 *type_is_new_ptr = true; 217 218 const dw_tag_t tag = die.Tag(); 219 220 bool is_forward_declaration = false; 221 DWARFAttributes attributes; 222 const char *type_name_cstr = NULL; 223 ConstString type_name_const_str; 224 Type::ResolveState resolve_state = Type::eResolveStateUnresolved; 225 uint64_t byte_size = 0; 226 Declaration decl; 227 228 Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID; 229 CompilerType clang_type; 230 DWARFFormValue form_value; 231 232 dw_attr_t attr; 233 234 switch (tag) { 235 case DW_TAG_typedef: 236 case DW_TAG_base_type: 237 case DW_TAG_pointer_type: 238 case DW_TAG_reference_type: 239 case DW_TAG_rvalue_reference_type: 240 case DW_TAG_const_type: 241 case DW_TAG_restrict_type: 242 case DW_TAG_volatile_type: 243 case DW_TAG_unspecified_type: { 244 // Set a bit that lets us know that we are currently parsing this 245 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 246 247 const size_t num_attributes = die.GetAttributes(attributes); 248 uint32_t encoding = 0; 249 DWARFFormValue encoding_uid; 250 251 if (num_attributes > 0) { 252 uint32_t i; 253 for (i = 0; i < num_attributes; ++i) { 254 attr = attributes.AttributeAtIndex(i); 255 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 256 switch (attr) { 257 case DW_AT_decl_file: 258 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 259 form_value.Unsigned())); 260 break; 261 case DW_AT_decl_line: 262 decl.SetLine(form_value.Unsigned()); 263 break; 264 case DW_AT_decl_column: 265 decl.SetColumn(form_value.Unsigned()); 266 break; 267 case DW_AT_name: 268 269 type_name_cstr = form_value.AsCString(); 270 // Work around a bug in llvm-gcc where they give a name to a 271 // reference type which doesn't 272 // include the "&"... 273 if (tag == DW_TAG_reference_type) { 274 if (strchr(type_name_cstr, '&') == NULL) 275 type_name_cstr = NULL; 276 } 277 if (type_name_cstr) 278 type_name_const_str.SetCString(type_name_cstr); 279 break; 280 case DW_AT_byte_size: 281 byte_size = form_value.Unsigned(); 282 break; 283 case DW_AT_encoding: 284 encoding = form_value.Unsigned(); 285 break; 286 case DW_AT_type: 287 encoding_uid = form_value; 288 break; 289 default: 290 case DW_AT_sibling: 291 break; 292 } 293 } 294 } 295 } 296 297 if (tag == DW_TAG_typedef && encoding_uid.IsValid()) { 298 // Try to parse a typedef from the DWO file first as modules 299 // can contain typedef'ed structures that have no names like: 300 // 301 // typedef struct { int a; } Foo; 302 // 303 // In this case we will have a structure with no name and a 304 // typedef named "Foo" that points to this unnamed structure. 305 // The name in the typedef is the only identifier for the struct, 306 // so always try to get typedefs from DWO files if possible. 307 // 308 // The type_sp returned will be empty if the typedef doesn't exist 309 // in a DWO file, so it is cheap to call this function just to check. 310 // 311 // If we don't do this we end up creating a TypeSP that says this 312 // is a typedef to type 0x123 (the DW_AT_type value would be 0x123 313 // in the DW_TAG_typedef), and this is the unnamed structure type. 314 // We will have a hard time tracking down an unnammed structure 315 // type in the module DWO file, so we make sure we don't get into 316 // this situation by always resolving typedefs from the DWO file. 317 const DWARFDIE encoding_die = dwarf->GetDIE(DIERef(encoding_uid)); 318 319 // First make sure that the die that this is typedef'ed to _is_ 320 // just a declaration (DW_AT_declaration == 1), not a full definition 321 // since template types can't be represented in modules since only 322 // concrete instances of templates are ever emitted and modules 323 // won't contain those 324 if (encoding_die && 325 encoding_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 326 1) { 327 type_sp = ParseTypeFromDWO(die, log); 328 if (type_sp) 329 return type_sp; 330 } 331 } 332 333 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\") type => 0x%8.8lx\n", 334 die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr, 335 encoding_uid.Reference()); 336 337 switch (tag) { 338 default: 339 break; 340 341 case DW_TAG_unspecified_type: 342 if (strcmp(type_name_cstr, "nullptr_t") == 0 || 343 strcmp(type_name_cstr, "decltype(nullptr)") == 0) { 344 resolve_state = Type::eResolveStateFull; 345 clang_type = m_ast.GetBasicType(eBasicTypeNullPtr); 346 break; 347 } 348 // Fall through to base type below in case we can handle the type 349 // there... 350 LLVM_FALLTHROUGH; 351 352 case DW_TAG_base_type: 353 resolve_state = Type::eResolveStateFull; 354 clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize( 355 type_name_cstr, encoding, byte_size * 8); 356 break; 357 358 case DW_TAG_pointer_type: 359 encoding_data_type = Type::eEncodingIsPointerUID; 360 break; 361 case DW_TAG_reference_type: 362 encoding_data_type = Type::eEncodingIsLValueReferenceUID; 363 break; 364 case DW_TAG_rvalue_reference_type: 365 encoding_data_type = Type::eEncodingIsRValueReferenceUID; 366 break; 367 case DW_TAG_typedef: 368 encoding_data_type = Type::eEncodingIsTypedefUID; 369 break; 370 case DW_TAG_const_type: 371 encoding_data_type = Type::eEncodingIsConstUID; 372 break; 373 case DW_TAG_restrict_type: 374 encoding_data_type = Type::eEncodingIsRestrictUID; 375 break; 376 case DW_TAG_volatile_type: 377 encoding_data_type = Type::eEncodingIsVolatileUID; 378 break; 379 } 380 381 if (!clang_type && 382 (encoding_data_type == Type::eEncodingIsPointerUID || 383 encoding_data_type == Type::eEncodingIsTypedefUID) && 384 sc.comp_unit != NULL) { 385 if (tag == DW_TAG_pointer_type) { 386 DWARFDIE target_die = die.GetReferencedDIE(DW_AT_type); 387 388 if (target_die.GetAttributeValueAsUnsigned(DW_AT_APPLE_block, 0)) { 389 // Blocks have a __FuncPtr inside them which is a pointer to a 390 // function of the proper type. 391 392 for (DWARFDIE child_die = target_die.GetFirstChild(); 393 child_die.IsValid(); child_die = child_die.GetSibling()) { 394 if (!strcmp(child_die.GetAttributeValueAsString(DW_AT_name, ""), 395 "__FuncPtr")) { 396 DWARFDIE function_pointer_type = 397 child_die.GetReferencedDIE(DW_AT_type); 398 399 if (function_pointer_type) { 400 DWARFDIE function_type = 401 function_pointer_type.GetReferencedDIE(DW_AT_type); 402 403 bool function_type_is_new_pointer; 404 TypeSP lldb_function_type_sp = ParseTypeFromDWARF( 405 sc, function_type, log, &function_type_is_new_pointer); 406 407 if (lldb_function_type_sp) { 408 clang_type = m_ast.CreateBlockPointerType( 409 lldb_function_type_sp->GetForwardCompilerType()); 410 encoding_data_type = Type::eEncodingIsUID; 411 encoding_uid.Clear(); 412 resolve_state = Type::eResolveStateFull; 413 } 414 } 415 416 break; 417 } 418 } 419 } 420 } 421 422 bool translation_unit_is_objc = 423 (sc.comp_unit->GetLanguage() == eLanguageTypeObjC || 424 sc.comp_unit->GetLanguage() == eLanguageTypeObjC_plus_plus); 425 426 if (translation_unit_is_objc) { 427 if (type_name_cstr != NULL) { 428 static ConstString g_objc_type_name_id("id"); 429 static ConstString g_objc_type_name_Class("Class"); 430 static ConstString g_objc_type_name_selector("SEL"); 431 432 if (type_name_const_str == g_objc_type_name_id) { 433 if (log) 434 dwarf->GetObjectFile()->GetModule()->LogMessage( 435 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 436 "is Objective C 'id' built-in type.", 437 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 438 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 439 encoding_data_type = Type::eEncodingIsUID; 440 encoding_uid.Clear(); 441 resolve_state = Type::eResolveStateFull; 442 443 } else if (type_name_const_str == g_objc_type_name_Class) { 444 if (log) 445 dwarf->GetObjectFile()->GetModule()->LogMessage( 446 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 447 "is Objective C 'Class' built-in type.", 448 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 449 clang_type = m_ast.GetBasicType(eBasicTypeObjCClass); 450 encoding_data_type = Type::eEncodingIsUID; 451 encoding_uid.Clear(); 452 resolve_state = Type::eResolveStateFull; 453 } else if (type_name_const_str == g_objc_type_name_selector) { 454 if (log) 455 dwarf->GetObjectFile()->GetModule()->LogMessage( 456 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 457 "is Objective C 'selector' built-in type.", 458 die.GetOffset(), die.GetTagAsCString(), die.GetName()); 459 clang_type = m_ast.GetBasicType(eBasicTypeObjCSel); 460 encoding_data_type = Type::eEncodingIsUID; 461 encoding_uid.Clear(); 462 resolve_state = Type::eResolveStateFull; 463 } 464 } else if (encoding_data_type == Type::eEncodingIsPointerUID && 465 encoding_uid.IsValid()) { 466 // Clang sometimes erroneously emits id as objc_object*. In that 467 // case we fix up the type to "id". 468 469 const DWARFDIE encoding_die = dwarf->GetDIE(DIERef(encoding_uid)); 470 471 if (encoding_die && encoding_die.Tag() == DW_TAG_structure_type) { 472 if (const char *struct_name = encoding_die.GetName()) { 473 if (!strcmp(struct_name, "objc_object")) { 474 if (log) 475 dwarf->GetObjectFile()->GetModule()->LogMessage( 476 log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s " 477 "'%s' is 'objc_object*', which we overrode to " 478 "'id'.", 479 die.GetOffset(), die.GetTagAsCString(), 480 die.GetName()); 481 clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 482 encoding_data_type = Type::eEncodingIsUID; 483 encoding_uid.Clear(); 484 resolve_state = Type::eResolveStateFull; 485 } 486 } 487 } 488 } 489 } 490 } 491 492 type_sp.reset( 493 new Type(die.GetID(), dwarf, type_name_const_str, byte_size, NULL, 494 DIERef(encoding_uid).GetUID(dwarf), encoding_data_type, 495 &decl, clang_type, resolve_state)); 496 497 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 498 499 // Type* encoding_type = 500 // GetUniquedTypeForDIEOffset(encoding_uid, type_sp, 501 // NULL, 0, 0, false); 502 // if (encoding_type != NULL) 503 // { 504 // if (encoding_type != DIE_IS_BEING_PARSED) 505 // type_sp->SetEncodingType(encoding_type); 506 // else 507 // m_indirect_fixups.push_back(type_sp.get()); 508 // } 509 } break; 510 511 case DW_TAG_structure_type: 512 case DW_TAG_union_type: 513 case DW_TAG_class_type: { 514 // Set a bit that lets us know that we are currently parsing this 515 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 516 bool byte_size_valid = false; 517 518 LanguageType class_language = eLanguageTypeUnknown; 519 bool is_complete_objc_class = false; 520 // bool struct_is_class = false; 521 const size_t num_attributes = die.GetAttributes(attributes); 522 if (num_attributes > 0) { 523 uint32_t i; 524 for (i = 0; i < num_attributes; ++i) { 525 attr = attributes.AttributeAtIndex(i); 526 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 527 switch (attr) { 528 case DW_AT_decl_file: 529 if (die.GetCU()->DW_AT_decl_file_attributes_are_invalid()) { 530 // llvm-gcc outputs invalid DW_AT_decl_file attributes that 531 // always 532 // point to the compile unit file, so we clear this invalid 533 // value 534 // so that we can still unique types efficiently. 535 decl.SetFile(FileSpec("<invalid>", false)); 536 } else 537 decl.SetFile( 538 sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 539 form_value.Unsigned())); 540 break; 541 542 case DW_AT_decl_line: 543 decl.SetLine(form_value.Unsigned()); 544 break; 545 546 case DW_AT_decl_column: 547 decl.SetColumn(form_value.Unsigned()); 548 break; 549 550 case DW_AT_name: 551 type_name_cstr = form_value.AsCString(); 552 type_name_const_str.SetCString(type_name_cstr); 553 break; 554 555 case DW_AT_byte_size: 556 byte_size = form_value.Unsigned(); 557 byte_size_valid = true; 558 break; 559 560 case DW_AT_accessibility: 561 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 562 break; 563 564 case DW_AT_declaration: 565 is_forward_declaration = form_value.Boolean(); 566 break; 567 568 case DW_AT_APPLE_runtime_class: 569 class_language = (LanguageType)form_value.Signed(); 570 break; 571 572 case DW_AT_APPLE_objc_complete_type: 573 is_complete_objc_class = form_value.Signed(); 574 break; 575 576 case DW_AT_allocated: 577 case DW_AT_associated: 578 case DW_AT_data_location: 579 case DW_AT_description: 580 case DW_AT_start_scope: 581 case DW_AT_visibility: 582 default: 583 case DW_AT_sibling: 584 break; 585 } 586 } 587 } 588 } 589 590 // UniqueDWARFASTType is large, so don't create a local variables on the 591 // stack, put it on the heap. This function is often called recursively 592 // and clang isn't good and sharing the stack space for variables in 593 // different blocks. 594 std::unique_ptr<UniqueDWARFASTType> unique_ast_entry_ap( 595 new UniqueDWARFASTType()); 596 597 ConstString unique_typename(type_name_const_str); 598 Declaration unique_decl(decl); 599 600 if (type_name_const_str) { 601 LanguageType die_language = die.GetLanguage(); 602 if (Language::LanguageIsCPlusPlus(die_language)) { 603 // For C++, we rely solely upon the one definition rule that says 604 // only 605 // one thing can exist at a given decl context. We ignore the file 606 // and 607 // line that things are declared on. 608 std::string qualified_name; 609 if (die.GetQualifiedName(qualified_name)) 610 unique_typename = ConstString(qualified_name); 611 unique_decl.Clear(); 612 } 613 614 if (dwarf->GetUniqueDWARFASTTypeMap().Find( 615 unique_typename, die, unique_decl, 616 byte_size_valid ? byte_size : -1, *unique_ast_entry_ap)) { 617 type_sp = unique_ast_entry_ap->m_type_sp; 618 if (type_sp) { 619 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 620 return type_sp; 621 } 622 } 623 } 624 625 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 626 DW_TAG_value_to_name(tag), type_name_cstr); 627 628 int tag_decl_kind = -1; 629 AccessType default_accessibility = eAccessNone; 630 if (tag == DW_TAG_structure_type) { 631 tag_decl_kind = clang::TTK_Struct; 632 default_accessibility = eAccessPublic; 633 } else if (tag == DW_TAG_union_type) { 634 tag_decl_kind = clang::TTK_Union; 635 default_accessibility = eAccessPublic; 636 } else if (tag == DW_TAG_class_type) { 637 tag_decl_kind = clang::TTK_Class; 638 default_accessibility = eAccessPrivate; 639 } 640 641 if (byte_size_valid && byte_size == 0 && type_name_cstr && 642 die.HasChildren() == false && 643 sc.comp_unit->GetLanguage() == eLanguageTypeObjC) { 644 // Work around an issue with clang at the moment where 645 // forward declarations for objective C classes are emitted 646 // as: 647 // DW_TAG_structure_type [2] 648 // DW_AT_name( "ForwardObjcClass" ) 649 // DW_AT_byte_size( 0x00 ) 650 // DW_AT_decl_file( "..." ) 651 // DW_AT_decl_line( 1 ) 652 // 653 // Note that there is no DW_AT_declaration and there are 654 // no children, and the byte size is zero. 655 is_forward_declaration = true; 656 } 657 658 if (class_language == eLanguageTypeObjC || 659 class_language == eLanguageTypeObjC_plus_plus) { 660 if (!is_complete_objc_class && 661 die.Supports_DW_AT_APPLE_objc_complete_type()) { 662 // We have a valid eSymbolTypeObjCClass class symbol whose 663 // name matches the current objective C class that we 664 // are trying to find and this DIE isn't the complete 665 // definition (we checked is_complete_objc_class above and 666 // know it is false), so the real definition is in here somewhere 667 type_sp = dwarf->FindCompleteObjCDefinitionTypeForDIE( 668 die, type_name_const_str, true); 669 670 if (!type_sp) { 671 SymbolFileDWARFDebugMap *debug_map_symfile = 672 dwarf->GetDebugMapSymfile(); 673 if (debug_map_symfile) { 674 // We weren't able to find a full declaration in 675 // this DWARF, see if we have a declaration anywhere 676 // else... 677 type_sp = 678 debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE( 679 die, type_name_const_str, true); 680 } 681 } 682 683 if (type_sp) { 684 if (log) { 685 dwarf->GetObjectFile()->GetModule()->LogMessage( 686 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is an " 687 "incomplete objc type, complete type is 0x%8.8" PRIx64, 688 static_cast<void *>(this), die.GetOffset(), 689 DW_TAG_value_to_name(tag), type_name_cstr, 690 type_sp->GetID()); 691 } 692 693 // We found a real definition for this type elsewhere 694 // so lets use it and cache the fact that we found 695 // a complete type for this die 696 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 697 return type_sp; 698 } 699 } 700 } 701 702 if (is_forward_declaration) { 703 // We have a forward declaration to a type and we need 704 // to try and find a full declaration. We look in the 705 // current type index just in case we have a forward 706 // declaration followed by an actual declarations in the 707 // DWARF. If this fails, we need to look elsewhere... 708 if (log) { 709 dwarf->GetObjectFile()->GetModule()->LogMessage( 710 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 711 "forward declaration, trying to find complete type", 712 static_cast<void *>(this), die.GetOffset(), 713 DW_TAG_value_to_name(tag), type_name_cstr); 714 } 715 716 // See if the type comes from a DWO module and if so, track down that 717 // type. 718 type_sp = ParseTypeFromDWO(die, log); 719 if (type_sp) 720 return type_sp; 721 722 DWARFDeclContext die_decl_ctx; 723 die.GetDWARFDeclContext(die_decl_ctx); 724 725 // type_sp = FindDefinitionTypeForDIE (dwarf_cu, die, 726 // type_name_const_str); 727 type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx); 728 729 if (!type_sp) { 730 SymbolFileDWARFDebugMap *debug_map_symfile = 731 dwarf->GetDebugMapSymfile(); 732 if (debug_map_symfile) { 733 // We weren't able to find a full declaration in 734 // this DWARF, see if we have a declaration anywhere 735 // else... 736 type_sp = 737 debug_map_symfile->FindDefinitionTypeForDWARFDeclContext( 738 die_decl_ctx); 739 } 740 } 741 742 if (type_sp) { 743 if (log) { 744 dwarf->GetObjectFile()->GetModule()->LogMessage( 745 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 746 "forward declaration, complete type is 0x%8.8" PRIx64, 747 static_cast<void *>(this), die.GetOffset(), 748 DW_TAG_value_to_name(tag), type_name_cstr, type_sp->GetID()); 749 } 750 751 // We found a real definition for this type elsewhere 752 // so lets use it and cache the fact that we found 753 // a complete type for this die 754 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 755 clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE( 756 dwarf->DebugInfo()->GetDIE(DIERef(type_sp->GetID(), dwarf))); 757 if (defn_decl_ctx) 758 LinkDeclContextToDIE(defn_decl_ctx, die); 759 return type_sp; 760 } 761 } 762 assert(tag_decl_kind != -1); 763 bool clang_type_was_created = false; 764 clang_type.SetCompilerType( 765 &m_ast, dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE())); 766 if (!clang_type) { 767 clang::DeclContext *decl_ctx = 768 GetClangDeclContextContainingDIE(die, nullptr); 769 if (accessibility == eAccessNone && decl_ctx) { 770 // Check the decl context that contains this class/struct/union. 771 // If it is a class we must give it an accessibility. 772 const clang::Decl::Kind containing_decl_kind = 773 decl_ctx->getDeclKind(); 774 if (DeclKindIsCXXClass(containing_decl_kind)) 775 accessibility = default_accessibility; 776 } 777 778 ClangASTMetadata metadata; 779 metadata.SetUserID(die.GetID()); 780 metadata.SetIsDynamicCXXType(dwarf->ClassOrStructIsVirtual(die)); 781 782 if (type_name_cstr && strchr(type_name_cstr, '<')) { 783 ClangASTContext::TemplateParameterInfos template_param_infos; 784 if (ParseTemplateParameterInfos(die, template_param_infos)) { 785 clang::ClassTemplateDecl *class_template_decl = 786 m_ast.ParseClassTemplateDecl(decl_ctx, accessibility, 787 type_name_cstr, tag_decl_kind, 788 template_param_infos); 789 790 clang::ClassTemplateSpecializationDecl 791 *class_specialization_decl = 792 m_ast.CreateClassTemplateSpecializationDecl( 793 decl_ctx, class_template_decl, tag_decl_kind, 794 template_param_infos); 795 clang_type = m_ast.CreateClassTemplateSpecializationType( 796 class_specialization_decl); 797 clang_type_was_created = true; 798 799 m_ast.SetMetadata(class_template_decl, metadata); 800 m_ast.SetMetadata(class_specialization_decl, metadata); 801 } 802 } 803 804 if (!clang_type_was_created) { 805 clang_type_was_created = true; 806 clang_type = m_ast.CreateRecordType(decl_ctx, accessibility, 807 type_name_cstr, tag_decl_kind, 808 class_language, &metadata); 809 } 810 } 811 812 // Store a forward declaration to this class type in case any 813 // parameters in any class methods need it for the clang 814 // types for function prototypes. 815 LinkDeclContextToDIE(m_ast.GetDeclContextForType(clang_type), die); 816 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, 817 byte_size, NULL, LLDB_INVALID_UID, 818 Type::eEncodingIsUID, &decl, clang_type, 819 Type::eResolveStateForward)); 820 821 type_sp->SetIsCompleteObjCClass(is_complete_objc_class); 822 823 // Add our type to the unique type map so we don't 824 // end up creating many copies of the same type over 825 // and over in the ASTContext for our module 826 unique_ast_entry_ap->m_type_sp = type_sp; 827 unique_ast_entry_ap->m_die = die; 828 unique_ast_entry_ap->m_declaration = unique_decl; 829 unique_ast_entry_ap->m_byte_size = byte_size; 830 dwarf->GetUniqueDWARFASTTypeMap().Insert(unique_typename, 831 *unique_ast_entry_ap); 832 833 if (is_forward_declaration && die.HasChildren()) { 834 // Check to see if the DIE actually has a definition, some version of 835 // GCC will 836 // emit DIEs with DW_AT_declaration set to true, but yet still have 837 // subprogram, 838 // members, or inheritance, so we can't trust it 839 DWARFDIE child_die = die.GetFirstChild(); 840 while (child_die) { 841 switch (child_die.Tag()) { 842 case DW_TAG_inheritance: 843 case DW_TAG_subprogram: 844 case DW_TAG_member: 845 case DW_TAG_APPLE_property: 846 case DW_TAG_class_type: 847 case DW_TAG_structure_type: 848 case DW_TAG_enumeration_type: 849 case DW_TAG_typedef: 850 case DW_TAG_union_type: 851 child_die.Clear(); 852 is_forward_declaration = false; 853 break; 854 default: 855 child_die = child_die.GetSibling(); 856 break; 857 } 858 } 859 } 860 861 if (!is_forward_declaration) { 862 // Always start the definition for a class type so that 863 // if the class has child classes or types that require 864 // the class to be created for use as their decl contexts 865 // the class will be ready to accept these child definitions. 866 if (die.HasChildren() == false) { 867 // No children for this struct/union/class, lets finish it 868 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 869 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 870 } else { 871 dwarf->GetObjectFile()->GetModule()->ReportError( 872 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 873 "definition.\nPlease file a bug and attach the file at the " 874 "start of this error message", 875 die.GetOffset(), type_name_cstr); 876 } 877 878 if (tag == DW_TAG_structure_type) // this only applies in C 879 { 880 clang::RecordDecl *record_decl = 881 ClangASTContext::GetAsRecordDecl(clang_type); 882 883 if (record_decl) { 884 GetClangASTImporter().InsertRecordDecl( 885 record_decl, ClangASTImporter::LayoutInfo()); 886 } 887 } 888 } else if (clang_type_was_created) { 889 // Start the definition if the class is not objective C since 890 // the underlying decls respond to isCompleteDefinition(). Objective 891 // C decls don't respond to isCompleteDefinition() so we can't 892 // start the declaration definition right away. For C++ 893 // class/union/structs 894 // we want to start the definition in case the class is needed as 895 // the 896 // declaration context for a contained class or type without the 897 // need 898 // to complete that type.. 899 900 if (class_language != eLanguageTypeObjC && 901 class_language != eLanguageTypeObjC_plus_plus) 902 ClangASTContext::StartTagDeclarationDefinition(clang_type); 903 904 // Leave this as a forward declaration until we need 905 // to know the details of the type. lldb_private::Type 906 // will automatically call the SymbolFile virtual function 907 // "SymbolFileDWARF::CompleteType(Type *)" 908 // When the definition needs to be defined. 909 assert(!dwarf->GetForwardDeclClangTypeToDie().count( 910 ClangUtil::RemoveFastQualifiers(clang_type) 911 .GetOpaqueQualType()) && 912 "Type already in the forward declaration map!"); 913 // Can't assume m_ast.GetSymbolFile() is actually a SymbolFileDWARF, 914 // it can be a 915 // SymbolFileDWARFDebugMap for Apple binaries. 916 dwarf->GetForwardDeclDieToClangType()[die.GetDIE()] = 917 clang_type.GetOpaqueQualType(); 918 dwarf->GetForwardDeclClangTypeToDie() 919 [ClangUtil::RemoveFastQualifiers(clang_type) 920 .GetOpaqueQualType()] = die.GetDIERef(); 921 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), true); 922 } 923 } 924 } break; 925 926 case DW_TAG_enumeration_type: { 927 // Set a bit that lets us know that we are currently parsing this 928 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 929 930 bool is_scoped = false; 931 DWARFFormValue encoding_form; 932 933 const size_t num_attributes = die.GetAttributes(attributes); 934 if (num_attributes > 0) { 935 uint32_t i; 936 937 for (i = 0; i < num_attributes; ++i) { 938 attr = attributes.AttributeAtIndex(i); 939 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 940 switch (attr) { 941 case DW_AT_decl_file: 942 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 943 form_value.Unsigned())); 944 break; 945 case DW_AT_decl_line: 946 decl.SetLine(form_value.Unsigned()); 947 break; 948 case DW_AT_decl_column: 949 decl.SetColumn(form_value.Unsigned()); 950 break; 951 case DW_AT_name: 952 type_name_cstr = form_value.AsCString(); 953 type_name_const_str.SetCString(type_name_cstr); 954 break; 955 case DW_AT_type: 956 encoding_form = form_value; 957 break; 958 case DW_AT_byte_size: 959 byte_size = form_value.Unsigned(); 960 break; 961 case DW_AT_accessibility: 962 break; // accessibility = 963 // DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 964 case DW_AT_declaration: 965 is_forward_declaration = form_value.Boolean(); 966 break; 967 case DW_AT_enum_class: 968 is_scoped = form_value.Boolean(); 969 break; 970 case DW_AT_allocated: 971 case DW_AT_associated: 972 case DW_AT_bit_stride: 973 case DW_AT_byte_stride: 974 case DW_AT_data_location: 975 case DW_AT_description: 976 case DW_AT_start_scope: 977 case DW_AT_visibility: 978 case DW_AT_specification: 979 case DW_AT_abstract_origin: 980 case DW_AT_sibling: 981 break; 982 } 983 } 984 } 985 986 if (is_forward_declaration) { 987 type_sp = ParseTypeFromDWO(die, log); 988 if (type_sp) 989 return type_sp; 990 991 DWARFDeclContext die_decl_ctx; 992 die.GetDWARFDeclContext(die_decl_ctx); 993 994 type_sp = 995 dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx); 996 997 if (!type_sp) { 998 SymbolFileDWARFDebugMap *debug_map_symfile = 999 dwarf->GetDebugMapSymfile(); 1000 if (debug_map_symfile) { 1001 // We weren't able to find a full declaration in 1002 // this DWARF, see if we have a declaration anywhere 1003 // else... 1004 type_sp = 1005 debug_map_symfile->FindDefinitionTypeForDWARFDeclContext( 1006 die_decl_ctx); 1007 } 1008 } 1009 1010 if (type_sp) { 1011 if (log) { 1012 dwarf->GetObjectFile()->GetModule()->LogMessage( 1013 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 1014 "forward declaration, complete type is 0x%8.8" PRIx64, 1015 static_cast<void *>(this), die.GetOffset(), 1016 DW_TAG_value_to_name(tag), type_name_cstr, 1017 type_sp->GetID()); 1018 } 1019 1020 // We found a real definition for this type elsewhere 1021 // so lets use it and cache the fact that we found 1022 // a complete type for this die 1023 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1024 clang::DeclContext *defn_decl_ctx = 1025 GetCachedClangDeclContextForDIE(dwarf->DebugInfo()->GetDIE( 1026 DIERef(type_sp->GetID(), dwarf))); 1027 if (defn_decl_ctx) 1028 LinkDeclContextToDIE(defn_decl_ctx, die); 1029 return type_sp; 1030 } 1031 } 1032 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1033 DW_TAG_value_to_name(tag), type_name_cstr); 1034 1035 CompilerType enumerator_clang_type; 1036 clang_type.SetCompilerType( 1037 &m_ast, 1038 dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE())); 1039 if (!clang_type) { 1040 if (encoding_form.IsValid()) { 1041 Type *enumerator_type = 1042 dwarf->ResolveTypeUID(DIERef(encoding_form)); 1043 if (enumerator_type) 1044 enumerator_clang_type = enumerator_type->GetFullCompilerType(); 1045 } 1046 1047 if (!enumerator_clang_type) { 1048 if (byte_size > 0) { 1049 enumerator_clang_type = 1050 m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize( 1051 NULL, DW_ATE_signed, byte_size * 8); 1052 } else { 1053 enumerator_clang_type = m_ast.GetBasicType(eBasicTypeInt); 1054 } 1055 } 1056 1057 clang_type = m_ast.CreateEnumerationType( 1058 type_name_cstr, GetClangDeclContextContainingDIE(die, nullptr), 1059 decl, enumerator_clang_type, is_scoped); 1060 } else { 1061 enumerator_clang_type = 1062 m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType()); 1063 } 1064 1065 LinkDeclContextToDIE( 1066 ClangASTContext::GetDeclContextForType(clang_type), die); 1067 1068 type_sp.reset(new Type( 1069 die.GetID(), dwarf, type_name_const_str, byte_size, NULL, 1070 DIERef(encoding_form).GetUID(dwarf), Type::eEncodingIsUID, &decl, 1071 clang_type, Type::eResolveStateForward)); 1072 1073 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 1074 if (die.HasChildren()) { 1075 SymbolContext cu_sc(die.GetLLDBCompileUnit()); 1076 bool is_signed = false; 1077 enumerator_clang_type.IsIntegerType(is_signed); 1078 ParseChildEnumerators(cu_sc, clang_type, is_signed, 1079 type_sp->GetByteSize(), die); 1080 } 1081 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 1082 } else { 1083 dwarf->GetObjectFile()->GetModule()->ReportError( 1084 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 1085 "definition.\nPlease file a bug and attach the file at the " 1086 "start of this error message", 1087 die.GetOffset(), type_name_cstr); 1088 } 1089 } 1090 } break; 1091 1092 case DW_TAG_inlined_subroutine: 1093 case DW_TAG_subprogram: 1094 case DW_TAG_subroutine_type: { 1095 // Set a bit that lets us know that we are currently parsing this 1096 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1097 1098 DWARFFormValue type_die_form; 1099 bool is_variadic = false; 1100 bool is_inline = false; 1101 bool is_static = false; 1102 bool is_virtual = false; 1103 bool is_explicit = false; 1104 bool is_artificial = false; 1105 bool has_template_params = false; 1106 DWARFFormValue specification_die_form; 1107 DWARFFormValue abstract_origin_die_form; 1108 dw_offset_t object_pointer_die_offset = DW_INVALID_OFFSET; 1109 1110 unsigned type_quals = 0; 1111 clang::StorageClass storage = 1112 clang::SC_None; //, Extern, Static, PrivateExtern 1113 1114 const size_t num_attributes = die.GetAttributes(attributes); 1115 if (num_attributes > 0) { 1116 uint32_t i; 1117 for (i = 0; i < num_attributes; ++i) { 1118 attr = attributes.AttributeAtIndex(i); 1119 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1120 switch (attr) { 1121 case DW_AT_decl_file: 1122 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 1123 form_value.Unsigned())); 1124 break; 1125 case DW_AT_decl_line: 1126 decl.SetLine(form_value.Unsigned()); 1127 break; 1128 case DW_AT_decl_column: 1129 decl.SetColumn(form_value.Unsigned()); 1130 break; 1131 case DW_AT_name: 1132 type_name_cstr = form_value.AsCString(); 1133 type_name_const_str.SetCString(type_name_cstr); 1134 break; 1135 1136 case DW_AT_linkage_name: 1137 case DW_AT_MIPS_linkage_name: 1138 break; // mangled = 1139 // form_value.AsCString(&dwarf->get_debug_str_data()); 1140 // break; 1141 case DW_AT_type: 1142 type_die_form = form_value; 1143 break; 1144 case DW_AT_accessibility: 1145 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 1146 break; 1147 case DW_AT_declaration: 1148 break; // is_forward_declaration = form_value.Boolean(); break; 1149 case DW_AT_inline: 1150 is_inline = form_value.Boolean(); 1151 break; 1152 case DW_AT_virtuality: 1153 is_virtual = form_value.Boolean(); 1154 break; 1155 case DW_AT_explicit: 1156 is_explicit = form_value.Boolean(); 1157 break; 1158 case DW_AT_artificial: 1159 is_artificial = form_value.Boolean(); 1160 break; 1161 1162 case DW_AT_external: 1163 if (form_value.Unsigned()) { 1164 if (storage == clang::SC_None) 1165 storage = clang::SC_Extern; 1166 else 1167 storage = clang::SC_PrivateExtern; 1168 } 1169 break; 1170 1171 case DW_AT_specification: 1172 specification_die_form = form_value; 1173 break; 1174 1175 case DW_AT_abstract_origin: 1176 abstract_origin_die_form = form_value; 1177 break; 1178 1179 case DW_AT_object_pointer: 1180 object_pointer_die_offset = form_value.Reference(); 1181 break; 1182 1183 case DW_AT_allocated: 1184 case DW_AT_associated: 1185 case DW_AT_address_class: 1186 case DW_AT_calling_convention: 1187 case DW_AT_data_location: 1188 case DW_AT_elemental: 1189 case DW_AT_entry_pc: 1190 case DW_AT_frame_base: 1191 case DW_AT_high_pc: 1192 case DW_AT_low_pc: 1193 case DW_AT_prototyped: 1194 case DW_AT_pure: 1195 case DW_AT_ranges: 1196 case DW_AT_recursive: 1197 case DW_AT_return_addr: 1198 case DW_AT_segment: 1199 case DW_AT_start_scope: 1200 case DW_AT_static_link: 1201 case DW_AT_trampoline: 1202 case DW_AT_visibility: 1203 case DW_AT_vtable_elem_location: 1204 case DW_AT_description: 1205 case DW_AT_sibling: 1206 break; 1207 } 1208 } 1209 } 1210 } 1211 1212 std::string object_pointer_name; 1213 if (object_pointer_die_offset != DW_INVALID_OFFSET) { 1214 DWARFDIE object_pointer_die = die.GetDIE(object_pointer_die_offset); 1215 if (object_pointer_die) { 1216 const char *object_pointer_name_cstr = object_pointer_die.GetName(); 1217 if (object_pointer_name_cstr) 1218 object_pointer_name = object_pointer_name_cstr; 1219 } 1220 } 1221 1222 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1223 DW_TAG_value_to_name(tag), type_name_cstr); 1224 1225 CompilerType return_clang_type; 1226 Type *func_type = NULL; 1227 1228 if (type_die_form.IsValid()) 1229 func_type = dwarf->ResolveTypeUID(DIERef(type_die_form)); 1230 1231 if (func_type) 1232 return_clang_type = func_type->GetForwardCompilerType(); 1233 else 1234 return_clang_type = m_ast.GetBasicType(eBasicTypeVoid); 1235 1236 std::vector<CompilerType> function_param_types; 1237 std::vector<clang::ParmVarDecl *> function_param_decls; 1238 1239 // Parse the function children for the parameters 1240 1241 DWARFDIE decl_ctx_die; 1242 clang::DeclContext *containing_decl_ctx = 1243 GetClangDeclContextContainingDIE(die, &decl_ctx_die); 1244 const clang::Decl::Kind containing_decl_kind = 1245 containing_decl_ctx->getDeclKind(); 1246 1247 bool is_cxx_method = DeclKindIsCXXClass(containing_decl_kind); 1248 // Start off static. This will be set to false in 1249 // ParseChildParameters(...) 1250 // if we find a "this" parameters as the first parameter 1251 if (is_cxx_method) { 1252 is_static = true; 1253 } 1254 1255 if (die.HasChildren()) { 1256 bool skip_artificial = true; 1257 ParseChildParameters(sc, containing_decl_ctx, die, skip_artificial, 1258 is_static, is_variadic, has_template_params, 1259 function_param_types, 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 1265 // DW_TAG_template_type_parameter 1266 // or DW_TAG_template_value_parameter the DW_TAG_subprogram DIE, then we 1267 // can't let this become 1268 // a method in a class. Why? Because templatized functions are only 1269 // emitted if one of the 1270 // templatized methods is used in the current compile unit and we will 1271 // end up with classes 1272 // that may or may not include these member functions and this means one 1273 // class won't match another 1274 // class definition and it affects our ability to use a class in the 1275 // clang expression parser. So 1276 // for the greater good, we currently must not allow any template member 1277 // functions in a class definition. 1278 if (is_cxx_method && has_template_params) { 1279 ignore_containing_context = true; 1280 is_cxx_method = false; 1281 } 1282 1283 // clang_type will get the function prototype clang type after this call 1284 clang_type = m_ast.CreateFunctionType( 1285 return_clang_type, function_param_types.data(), 1286 function_param_types.size(), is_variadic, type_quals); 1287 1288 if (type_name_cstr) { 1289 bool type_handled = false; 1290 if (tag == DW_TAG_subprogram || tag == DW_TAG_inlined_subroutine) { 1291 ObjCLanguage::MethodName objc_method(type_name_cstr, true); 1292 if (objc_method.IsValid(true)) { 1293 CompilerType class_opaque_type; 1294 ConstString class_name(objc_method.GetClassName()); 1295 if (class_name) { 1296 TypeSP complete_objc_class_type_sp( 1297 dwarf->FindCompleteObjCDefinitionTypeForDIE( 1298 DWARFDIE(), class_name, false)); 1299 1300 if (complete_objc_class_type_sp) { 1301 CompilerType type_clang_forward_type = 1302 complete_objc_class_type_sp->GetForwardCompilerType(); 1303 if (ClangASTContext::IsObjCObjectOrInterfaceType( 1304 type_clang_forward_type)) 1305 class_opaque_type = type_clang_forward_type; 1306 } 1307 } 1308 1309 if (class_opaque_type) { 1310 // If accessibility isn't set to anything valid, assume public 1311 // for 1312 // now... 1313 if (accessibility == eAccessNone) 1314 accessibility = eAccessPublic; 1315 1316 clang::ObjCMethodDecl *objc_method_decl = 1317 m_ast.AddMethodToObjCObjectType( 1318 class_opaque_type, type_name_cstr, clang_type, 1319 accessibility, is_artificial, is_variadic); 1320 type_handled = objc_method_decl != NULL; 1321 if (type_handled) { 1322 LinkDeclContextToDIE( 1323 ClangASTContext::GetAsDeclContext(objc_method_decl), die); 1324 m_ast.SetMetadataAsUserID(objc_method_decl, die.GetID()); 1325 } else { 1326 dwarf->GetObjectFile()->GetModule()->ReportError( 1327 "{0x%8.8x}: invalid Objective-C method 0x%4.4x (%s), " 1328 "please file a bug and attach the file at the start of " 1329 "this error message", 1330 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 1331 } 1332 } 1333 } else if (is_cxx_method) { 1334 // Look at the parent of this DIE and see if is is 1335 // a class or struct and see if this is actually a 1336 // C++ method 1337 Type *class_type = dwarf->ResolveType(decl_ctx_die); 1338 if (class_type) { 1339 bool alternate_defn = false; 1340 if (class_type->GetID() != decl_ctx_die.GetID() || 1341 decl_ctx_die.GetContainingDWOModuleDIE()) { 1342 alternate_defn = true; 1343 1344 // We uniqued the parent class of this function to another 1345 // class 1346 // so we now need to associate all dies under "decl_ctx_die" 1347 // to 1348 // DIEs in the DIE for "class_type"... 1349 SymbolFileDWARF *class_symfile = NULL; 1350 DWARFDIE class_type_die; 1351 1352 SymbolFileDWARFDebugMap *debug_map_symfile = 1353 dwarf->GetDebugMapSymfile(); 1354 if (debug_map_symfile) { 1355 class_symfile = debug_map_symfile->GetSymbolFileByOSOIndex( 1356 SymbolFileDWARFDebugMap::GetOSOIndexFromUserID( 1357 class_type->GetID())); 1358 class_type_die = class_symfile->DebugInfo()->GetDIE( 1359 DIERef(class_type->GetID(), dwarf)); 1360 } else { 1361 class_symfile = dwarf; 1362 class_type_die = dwarf->DebugInfo()->GetDIE( 1363 DIERef(class_type->GetID(), dwarf)); 1364 } 1365 if (class_type_die) { 1366 DWARFDIECollection failures; 1367 1368 CopyUniqueClassMethodTypes(decl_ctx_die, class_type_die, 1369 class_type, failures); 1370 1371 // FIXME do something with these failures that's smarter 1372 // than 1373 // just dropping them on the ground. Unfortunately classes 1374 // don't 1375 // like having stuff added to them after their definitions 1376 // are 1377 // complete... 1378 1379 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1380 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1381 type_sp = type_ptr->shared_from_this(); 1382 break; 1383 } 1384 } 1385 } 1386 1387 if (specification_die_form.IsValid()) { 1388 // We have a specification which we are going to base our 1389 // function 1390 // prototype off of, so we need this type to be completed so 1391 // that the 1392 // m_die_to_decl_ctx for the method in the specification has a 1393 // valid 1394 // clang decl context. 1395 class_type->GetForwardCompilerType(); 1396 // If we have a specification, then the function type should 1397 // have been 1398 // made with the specification and not with this die. 1399 DWARFDIE spec_die = dwarf->DebugInfo()->GetDIE( 1400 DIERef(specification_die_form)); 1401 clang::DeclContext *spec_clang_decl_ctx = 1402 GetClangDeclContextForDIE(spec_die); 1403 if (spec_clang_decl_ctx) { 1404 LinkDeclContextToDIE(spec_clang_decl_ctx, die); 1405 } else { 1406 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1407 "0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8" PRIx64 1408 ") has no decl\n", 1409 die.GetID(), specification_die_form.Reference()); 1410 } 1411 type_handled = true; 1412 } else if (abstract_origin_die_form.IsValid()) { 1413 // We have a specification which we are going to base our 1414 // function 1415 // prototype off of, so we need this type to be completed so 1416 // that the 1417 // m_die_to_decl_ctx for the method in the abstract origin has 1418 // a valid 1419 // clang decl context. 1420 class_type->GetForwardCompilerType(); 1421 1422 DWARFDIE abs_die = dwarf->DebugInfo()->GetDIE( 1423 DIERef(abstract_origin_die_form)); 1424 clang::DeclContext *abs_clang_decl_ctx = 1425 GetClangDeclContextForDIE(abs_die); 1426 if (abs_clang_decl_ctx) { 1427 LinkDeclContextToDIE(abs_clang_decl_ctx, die); 1428 } else { 1429 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1430 "0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8" PRIx64 1431 ") has no decl\n", 1432 die.GetID(), abstract_origin_die_form.Reference()); 1433 } 1434 type_handled = true; 1435 } else { 1436 CompilerType class_opaque_type = 1437 class_type->GetForwardCompilerType(); 1438 if (ClangASTContext::IsCXXClassType(class_opaque_type)) { 1439 if (class_opaque_type.IsBeingDefined() || alternate_defn) { 1440 if (!is_static && !die.HasChildren()) { 1441 // We have a C++ member function with no children (this 1442 // pointer!) 1443 // and clang will get mad if we try and make a function 1444 // that isn't 1445 // well formed in the DWARF, so we will just skip it... 1446 type_handled = true; 1447 } else { 1448 bool add_method = true; 1449 if (alternate_defn) { 1450 // If an alternate definition for the class exists, 1451 // then add the method only if an 1452 // equivalent is not already present. 1453 clang::CXXRecordDecl *record_decl = 1454 m_ast.GetAsCXXRecordDecl( 1455 class_opaque_type.GetOpaqueQualType()); 1456 if (record_decl) { 1457 for (auto method_iter = record_decl->method_begin(); 1458 method_iter != record_decl->method_end(); 1459 method_iter++) { 1460 clang::CXXMethodDecl *method_decl = *method_iter; 1461 if (method_decl->getNameInfo().getAsString() == 1462 std::string(type_name_cstr)) { 1463 if (method_decl->getType() == 1464 ClangUtil::GetQualType(clang_type)) { 1465 add_method = false; 1466 LinkDeclContextToDIE( 1467 ClangASTContext::GetAsDeclContext( 1468 method_decl), 1469 die); 1470 type_handled = true; 1471 1472 break; 1473 } 1474 } 1475 } 1476 } 1477 } 1478 1479 if (add_method) { 1480 llvm::PrettyStackTraceFormat stack_trace( 1481 "SymbolFileDWARF::ParseType() is adding a method " 1482 "%s to class %s in DIE 0x%8.8" PRIx64 " from %s", 1483 type_name_cstr, 1484 class_type->GetName().GetCString(), die.GetID(), 1485 dwarf->GetObjectFile() 1486 ->GetFileSpec() 1487 .GetPath() 1488 .c_str()); 1489 1490 const bool is_attr_used = false; 1491 // Neither GCC 4.2 nor clang++ currently set a valid 1492 // accessibility 1493 // in the DWARF for C++ methods... Default to public 1494 // for now... 1495 if (accessibility == eAccessNone) 1496 accessibility = eAccessPublic; 1497 1498 clang::CXXMethodDecl *cxx_method_decl = 1499 m_ast.AddMethodToCXXRecordType( 1500 class_opaque_type.GetOpaqueQualType(), 1501 type_name_cstr, clang_type, accessibility, 1502 is_virtual, is_static, is_inline, is_explicit, 1503 is_attr_used, is_artificial); 1504 1505 type_handled = cxx_method_decl != NULL; 1506 1507 if (type_handled) { 1508 LinkDeclContextToDIE( 1509 ClangASTContext::GetAsDeclContext( 1510 cxx_method_decl), 1511 die); 1512 1513 ClangASTMetadata metadata; 1514 metadata.SetUserID(die.GetID()); 1515 1516 if (!object_pointer_name.empty()) { 1517 metadata.SetObjectPtrName( 1518 object_pointer_name.c_str()); 1519 if (log) 1520 log->Printf( 1521 "Setting object pointer name: %s on method " 1522 "object %p.\n", 1523 object_pointer_name.c_str(), 1524 static_cast<void *>(cxx_method_decl)); 1525 } 1526 m_ast.SetMetadata(cxx_method_decl, metadata); 1527 } else { 1528 ignore_containing_context = true; 1529 } 1530 } 1531 } 1532 } else { 1533 // We were asked to parse the type for a method in a 1534 // class, yet the 1535 // class hasn't been asked to complete itself through the 1536 // clang::ExternalASTSource protocol, so we need to just 1537 // have the 1538 // class complete itself and do things the right way, then 1539 // our 1540 // DIE should then have an entry in the 1541 // dwarf->GetDIEToType() map. First 1542 // we need to modify the dwarf->GetDIEToType() so it 1543 // doesn't think we are 1544 // trying to parse this DIE anymore... 1545 dwarf->GetDIEToType()[die.GetDIE()] = NULL; 1546 1547 // Now we get the full type to force our class type to 1548 // complete itself 1549 // using the clang::ExternalASTSource protocol which will 1550 // parse all 1551 // base classes and all methods (including the method for 1552 // this DIE). 1553 class_type->GetFullCompilerType(); 1554 1555 // The type for this DIE should have been filled in the 1556 // function call above 1557 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1558 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1559 type_sp = type_ptr->shared_from_this(); 1560 break; 1561 } 1562 1563 // FIXME This is fixing some even uglier behavior but we 1564 // really need to 1565 // uniq the methods of each class as well as the class 1566 // itself. 1567 // <rdar://problem/11240464> 1568 type_handled = true; 1569 } 1570 } 1571 } 1572 } 1573 } 1574 } 1575 1576 if (!type_handled) { 1577 clang::FunctionDecl *function_decl = nullptr; 1578 1579 if (abstract_origin_die_form.IsValid()) { 1580 DWARFDIE abs_die = 1581 dwarf->DebugInfo()->GetDIE(DIERef(abstract_origin_die_form)); 1582 1583 SymbolContext sc; 1584 1585 if (dwarf->ResolveType(abs_die)) { 1586 function_decl = llvm::dyn_cast_or_null<clang::FunctionDecl>( 1587 GetCachedClangDeclContextForDIE(abs_die)); 1588 1589 if (function_decl) { 1590 LinkDeclContextToDIE(function_decl, die); 1591 } 1592 } 1593 } 1594 1595 if (!function_decl) { 1596 // We just have a function that isn't part of a class 1597 function_decl = m_ast.CreateFunctionDeclaration( 1598 ignore_containing_context ? m_ast.GetTranslationUnitDecl() 1599 : containing_decl_ctx, 1600 type_name_cstr, clang_type, storage, is_inline); 1601 1602 if (has_template_params) { 1603 ClangASTContext::TemplateParameterInfos template_param_infos; 1604 ParseTemplateParameterInfos(die, template_param_infos); 1605 clang::FunctionTemplateDecl *func_template_decl = 1606 m_ast.CreateFunctionTemplateDecl( 1607 containing_decl_ctx, function_decl, type_name_cstr, 1608 template_param_infos); 1609 m_ast.CreateFunctionTemplateSpecializationInfo( 1610 function_decl, func_template_decl, template_param_infos); 1611 } 1612 1613 lldbassert(function_decl); 1614 1615 if (function_decl) { 1616 LinkDeclContextToDIE(function_decl, die); 1617 1618 if (!function_param_decls.empty()) 1619 m_ast.SetFunctionParameters(function_decl, 1620 &function_param_decls.front(), 1621 function_param_decls.size()); 1622 1623 ClangASTMetadata metadata; 1624 metadata.SetUserID(die.GetID()); 1625 1626 if (!object_pointer_name.empty()) { 1627 metadata.SetObjectPtrName(object_pointer_name.c_str()); 1628 if (log) 1629 log->Printf("Setting object pointer name: %s on function " 1630 "object %p.", 1631 object_pointer_name.c_str(), 1632 static_cast<void *>(function_decl)); 1633 } 1634 m_ast.SetMetadata(function_decl, metadata); 1635 } 1636 } 1637 } 1638 } 1639 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, 0, NULL, 1640 LLDB_INVALID_UID, Type::eEncodingIsUID, &decl, 1641 clang_type, Type::eResolveStateFull)); 1642 assert(type_sp.get()); 1643 } break; 1644 1645 case DW_TAG_array_type: { 1646 // Set a bit that lets us know that we are currently parsing this 1647 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1648 1649 DWARFFormValue type_die_form; 1650 int64_t first_index = 0; 1651 uint32_t byte_stride = 0; 1652 uint32_t bit_stride = 0; 1653 bool is_vector = false; 1654 const size_t num_attributes = die.GetAttributes(attributes); 1655 1656 if (num_attributes > 0) { 1657 uint32_t i; 1658 for (i = 0; i < num_attributes; ++i) { 1659 attr = attributes.AttributeAtIndex(i); 1660 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1661 switch (attr) { 1662 case DW_AT_decl_file: 1663 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 1664 form_value.Unsigned())); 1665 break; 1666 case DW_AT_decl_line: 1667 decl.SetLine(form_value.Unsigned()); 1668 break; 1669 case DW_AT_decl_column: 1670 decl.SetColumn(form_value.Unsigned()); 1671 break; 1672 case DW_AT_name: 1673 type_name_cstr = form_value.AsCString(); 1674 type_name_const_str.SetCString(type_name_cstr); 1675 break; 1676 1677 case DW_AT_type: 1678 type_die_form = form_value; 1679 break; 1680 case DW_AT_byte_size: 1681 break; // byte_size = form_value.Unsigned(); break; 1682 case DW_AT_byte_stride: 1683 byte_stride = form_value.Unsigned(); 1684 break; 1685 case DW_AT_bit_stride: 1686 bit_stride = form_value.Unsigned(); 1687 break; 1688 case DW_AT_GNU_vector: 1689 is_vector = form_value.Boolean(); 1690 break; 1691 case DW_AT_accessibility: 1692 break; // accessibility = 1693 // DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 1694 case DW_AT_declaration: 1695 break; // is_forward_declaration = form_value.Boolean(); break; 1696 case DW_AT_allocated: 1697 case DW_AT_associated: 1698 case DW_AT_data_location: 1699 case DW_AT_description: 1700 case DW_AT_ordering: 1701 case DW_AT_start_scope: 1702 case DW_AT_visibility: 1703 case DW_AT_specification: 1704 case DW_AT_abstract_origin: 1705 case DW_AT_sibling: 1706 break; 1707 } 1708 } 1709 } 1710 1711 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1712 DW_TAG_value_to_name(tag), type_name_cstr); 1713 1714 DIERef type_die_ref(type_die_form); 1715 Type *element_type = dwarf->ResolveTypeUID(type_die_ref); 1716 1717 if (element_type) { 1718 std::vector<uint64_t> element_orders; 1719 ParseChildArrayInfo(sc, die, first_index, element_orders, 1720 byte_stride, bit_stride); 1721 if (byte_stride == 0 && bit_stride == 0) 1722 byte_stride = element_type->GetByteSize(); 1723 CompilerType array_element_type = 1724 element_type->GetForwardCompilerType(); 1725 1726 if (ClangASTContext::IsCXXClassType(array_element_type) && 1727 array_element_type.GetCompleteType() == false) { 1728 ModuleSP module_sp = die.GetModule(); 1729 if (module_sp) { 1730 if (die.GetCU()->GetProducer() == 1731 DWARFCompileUnit::eProducerClang) 1732 module_sp->ReportError( 1733 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a " 1734 "class/union/struct element type DIE 0x%8.8x that is a " 1735 "forward declaration, not a complete definition.\nTry " 1736 "compiling the source file with -fno-limit-debug-info or " 1737 "disable -gmodule", 1738 die.GetOffset(), type_die_ref.die_offset); 1739 else 1740 module_sp->ReportError( 1741 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a " 1742 "class/union/struct element type DIE 0x%8.8x that is a " 1743 "forward declaration, not a complete definition.\nPlease " 1744 "file a bug against the compiler and include the " 1745 "preprocessed output for %s", 1746 die.GetOffset(), type_die_ref.die_offset, 1747 die.GetLLDBCompileUnit() 1748 ? die.GetLLDBCompileUnit()->GetPath().c_str() 1749 : "the source file"); 1750 } 1751 1752 // We have no choice other than to pretend that the element class 1753 // type 1754 // is complete. If we don't do this, clang will crash when trying 1755 // to layout the class. Since we provide layout assistance, all 1756 // ivars in this class and other classes will be fine, this is 1757 // the best we can do short of crashing. 1758 if (ClangASTContext::StartTagDeclarationDefinition( 1759 array_element_type)) { 1760 ClangASTContext::CompleteTagDeclarationDefinition( 1761 array_element_type); 1762 } else { 1763 module_sp->ReportError("DWARF DIE at 0x%8.8x was not able to " 1764 "start its definition.\nPlease file a " 1765 "bug and attach the file at the start " 1766 "of this error message", 1767 type_die_ref.die_offset); 1768 } 1769 } 1770 1771 uint64_t array_element_bit_stride = byte_stride * 8 + bit_stride; 1772 if (element_orders.size() > 0) { 1773 uint64_t num_elements = 0; 1774 std::vector<uint64_t>::const_reverse_iterator pos; 1775 std::vector<uint64_t>::const_reverse_iterator end = 1776 element_orders.rend(); 1777 for (pos = element_orders.rbegin(); pos != end; ++pos) { 1778 num_elements = *pos; 1779 clang_type = m_ast.CreateArrayType(array_element_type, 1780 num_elements, is_vector); 1781 array_element_type = clang_type; 1782 array_element_bit_stride = 1783 num_elements ? array_element_bit_stride * num_elements 1784 : array_element_bit_stride; 1785 } 1786 } else { 1787 clang_type = 1788 m_ast.CreateArrayType(array_element_type, 0, is_vector); 1789 } 1790 ConstString empty_name; 1791 type_sp.reset(new Type( 1792 die.GetID(), dwarf, empty_name, array_element_bit_stride / 8, 1793 NULL, DIERef(type_die_form).GetUID(dwarf), Type::eEncodingIsUID, 1794 &decl, clang_type, Type::eResolveStateFull)); 1795 type_sp->SetEncodingType(element_type); 1796 } 1797 } 1798 } break; 1799 1800 case DW_TAG_ptr_to_member_type: { 1801 DWARFFormValue type_die_form; 1802 DWARFFormValue containing_type_die_form; 1803 1804 const size_t num_attributes = die.GetAttributes(attributes); 1805 1806 if (num_attributes > 0) { 1807 uint32_t i; 1808 for (i = 0; i < num_attributes; ++i) { 1809 attr = attributes.AttributeAtIndex(i); 1810 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1811 switch (attr) { 1812 case DW_AT_type: 1813 type_die_form = form_value; 1814 break; 1815 case DW_AT_containing_type: 1816 containing_type_die_form = form_value; 1817 break; 1818 } 1819 } 1820 } 1821 1822 Type *pointee_type = dwarf->ResolveTypeUID(DIERef(type_die_form)); 1823 Type *class_type = 1824 dwarf->ResolveTypeUID(DIERef(containing_type_die_form)); 1825 1826 CompilerType pointee_clang_type = 1827 pointee_type->GetForwardCompilerType(); 1828 CompilerType class_clang_type = class_type->GetLayoutCompilerType(); 1829 1830 clang_type = ClangASTContext::CreateMemberPointerType( 1831 class_clang_type, pointee_clang_type); 1832 1833 byte_size = clang_type.GetByteSize(nullptr); 1834 1835 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, 1836 byte_size, NULL, LLDB_INVALID_UID, 1837 Type::eEncodingIsUID, NULL, clang_type, 1838 Type::eResolveStateForward)); 1839 } 1840 1841 break; 1842 } 1843 default: 1844 dwarf->GetObjectFile()->GetModule()->ReportError( 1845 "{0x%8.8x}: unhandled type tag 0x%4.4x (%s), please file a bug and " 1846 "attach the file at the start of this error message", 1847 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 1848 break; 1849 } 1850 1851 if (type_sp.get()) { 1852 DWARFDIE sc_parent_die = 1853 SymbolFileDWARF::GetParentSymbolContextDIE(die); 1854 dw_tag_t sc_parent_tag = sc_parent_die.Tag(); 1855 1856 SymbolContextScope *symbol_context_scope = NULL; 1857 if (sc_parent_tag == DW_TAG_compile_unit) { 1858 symbol_context_scope = sc.comp_unit; 1859 } else if (sc.function != NULL && sc_parent_die) { 1860 symbol_context_scope = 1861 sc.function->GetBlock(true).FindBlockByID(sc_parent_die.GetID()); 1862 if (symbol_context_scope == NULL) 1863 symbol_context_scope = sc.function; 1864 } 1865 1866 if (symbol_context_scope != NULL) { 1867 type_sp->SetSymbolContextScope(symbol_context_scope); 1868 } 1869 1870 // We are ready to put this type into the uniqued list up at the module 1871 // level 1872 type_list->Insert(type_sp); 1873 1874 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1875 } 1876 } else if (type_ptr != DIE_IS_BEING_PARSED) { 1877 type_sp = type_ptr->shared_from_this(); 1878 } 1879 } 1880 return type_sp; 1881 } 1882 1883 // DWARF parsing functions 1884 1885 class DWARFASTParserClang::DelayedAddObjCClassProperty { 1886 public: 1887 DelayedAddObjCClassProperty( 1888 const CompilerType &class_opaque_type, const char *property_name, 1889 const CompilerType &property_opaque_type, // The property type is only 1890 // required if you don't have an 1891 // ivar decl 1892 clang::ObjCIvarDecl *ivar_decl, const char *property_setter_name, 1893 const char *property_getter_name, uint32_t property_attributes, 1894 const ClangASTMetadata *metadata) 1895 : m_class_opaque_type(class_opaque_type), m_property_name(property_name), 1896 m_property_opaque_type(property_opaque_type), m_ivar_decl(ivar_decl), 1897 m_property_setter_name(property_setter_name), 1898 m_property_getter_name(property_getter_name), 1899 m_property_attributes(property_attributes) { 1900 if (metadata != NULL) { 1901 m_metadata_ap.reset(new ClangASTMetadata()); 1902 *m_metadata_ap = *metadata; 1903 } 1904 } 1905 1906 DelayedAddObjCClassProperty(const DelayedAddObjCClassProperty &rhs) { 1907 *this = rhs; 1908 } 1909 1910 DelayedAddObjCClassProperty & 1911 operator=(const DelayedAddObjCClassProperty &rhs) { 1912 m_class_opaque_type = rhs.m_class_opaque_type; 1913 m_property_name = rhs.m_property_name; 1914 m_property_opaque_type = rhs.m_property_opaque_type; 1915 m_ivar_decl = rhs.m_ivar_decl; 1916 m_property_setter_name = rhs.m_property_setter_name; 1917 m_property_getter_name = rhs.m_property_getter_name; 1918 m_property_attributes = rhs.m_property_attributes; 1919 1920 if (rhs.m_metadata_ap.get()) { 1921 m_metadata_ap.reset(new ClangASTMetadata()); 1922 *m_metadata_ap = *rhs.m_metadata_ap; 1923 } 1924 return *this; 1925 } 1926 1927 bool Finalize() { 1928 return ClangASTContext::AddObjCClassProperty( 1929 m_class_opaque_type, m_property_name, m_property_opaque_type, 1930 m_ivar_decl, m_property_setter_name, m_property_getter_name, 1931 m_property_attributes, m_metadata_ap.get()); 1932 } 1933 1934 private: 1935 CompilerType m_class_opaque_type; 1936 const char *m_property_name; 1937 CompilerType m_property_opaque_type; 1938 clang::ObjCIvarDecl *m_ivar_decl; 1939 const char *m_property_setter_name; 1940 const char *m_property_getter_name; 1941 uint32_t m_property_attributes; 1942 std::unique_ptr<ClangASTMetadata> m_metadata_ap; 1943 }; 1944 1945 bool DWARFASTParserClang::ParseTemplateDIE( 1946 const DWARFDIE &die, 1947 ClangASTContext::TemplateParameterInfos &template_param_infos) { 1948 const dw_tag_t tag = die.Tag(); 1949 1950 switch (tag) { 1951 case DW_TAG_GNU_template_parameter_pack: { 1952 template_param_infos.packed_args.reset( 1953 new ClangASTContext::TemplateParameterInfos); 1954 for (DWARFDIE child_die = die.GetFirstChild(); child_die.IsValid(); 1955 child_die = child_die.GetSibling()) { 1956 if (!ParseTemplateDIE(child_die, *template_param_infos.packed_args)) 1957 return false; 1958 } 1959 if (const char *name = die.GetName()) { 1960 template_param_infos.pack_name = name; 1961 } 1962 return true; 1963 } 1964 case DW_TAG_template_type_parameter: 1965 case DW_TAG_template_value_parameter: { 1966 DWARFAttributes attributes; 1967 const size_t num_attributes = die.GetAttributes(attributes); 1968 const char *name = nullptr; 1969 CompilerType clang_type; 1970 uint64_t uval64 = 0; 1971 bool uval64_valid = false; 1972 if (num_attributes > 0) { 1973 DWARFFormValue form_value; 1974 for (size_t i = 0; i < num_attributes; ++i) { 1975 const dw_attr_t attr = attributes.AttributeAtIndex(i); 1976 1977 switch (attr) { 1978 case DW_AT_name: 1979 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1980 name = form_value.AsCString(); 1981 break; 1982 1983 case DW_AT_type: 1984 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1985 Type *lldb_type = die.ResolveTypeUID(DIERef(form_value)); 1986 if (lldb_type) 1987 clang_type = lldb_type->GetForwardCompilerType(); 1988 } 1989 break; 1990 1991 case DW_AT_const_value: 1992 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1993 uval64_valid = true; 1994 uval64 = form_value.Unsigned(); 1995 } 1996 break; 1997 default: 1998 break; 1999 } 2000 } 2001 2002 clang::ASTContext *ast = m_ast.getASTContext(); 2003 if (!clang_type) 2004 clang_type = m_ast.GetBasicType(eBasicTypeVoid); 2005 2006 if (clang_type) { 2007 bool is_signed = false; 2008 if (name && name[0]) 2009 template_param_infos.names.push_back(name); 2010 else 2011 template_param_infos.names.push_back(NULL); 2012 2013 // Get the signed value for any integer or enumeration if available 2014 clang_type.IsIntegerOrEnumerationType(is_signed); 2015 2016 if (tag == DW_TAG_template_value_parameter && uval64_valid) { 2017 llvm::APInt apint(clang_type.GetBitSize(nullptr), uval64, is_signed); 2018 template_param_infos.args.push_back( 2019 clang::TemplateArgument(*ast, llvm::APSInt(apint, !is_signed), 2020 ClangUtil::GetQualType(clang_type))); 2021 } else { 2022 template_param_infos.args.push_back( 2023 clang::TemplateArgument(ClangUtil::GetQualType(clang_type))); 2024 } 2025 } else { 2026 return false; 2027 } 2028 } 2029 } 2030 return true; 2031 2032 default: 2033 break; 2034 } 2035 return false; 2036 } 2037 2038 bool DWARFASTParserClang::ParseTemplateParameterInfos( 2039 const DWARFDIE &parent_die, 2040 ClangASTContext::TemplateParameterInfos &template_param_infos) { 2041 2042 if (!parent_die) 2043 return false; 2044 2045 Args template_parameter_names; 2046 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2047 die = die.GetSibling()) { 2048 const dw_tag_t tag = die.Tag(); 2049 2050 switch (tag) { 2051 case DW_TAG_template_type_parameter: 2052 case DW_TAG_template_value_parameter: 2053 case DW_TAG_GNU_template_parameter_pack: 2054 ParseTemplateDIE(die, template_param_infos); 2055 break; 2056 2057 default: 2058 break; 2059 } 2060 } 2061 if (template_param_infos.args.empty()) 2062 return false; 2063 return template_param_infos.args.size() == template_param_infos.names.size(); 2064 } 2065 2066 bool DWARFASTParserClang::CompleteTypeFromDWARF(const DWARFDIE &die, 2067 lldb_private::Type *type, 2068 CompilerType &clang_type) { 2069 SymbolFileDWARF *dwarf = die.GetDWARF(); 2070 2071 std::lock_guard<std::recursive_mutex> guard( 2072 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 #if defined LLDB_CONFIGURATION_DEBUG 2082 //---------------------------------------------------------------------- 2083 // For debugging purposes, the LLDB_DWARF_DONT_COMPLETE_TYPENAMES 2084 // environment variable can be set with one or more typenames separated 2085 // by ';' characters. This will cause this function to not complete any 2086 // types whose names match. 2087 // 2088 // Examples of setting this environment variable: 2089 // 2090 // LLDB_DWARF_DONT_COMPLETE_TYPENAMES=Foo 2091 // LLDB_DWARF_DONT_COMPLETE_TYPENAMES=Foo;Bar;Baz 2092 //---------------------------------------------------------------------- 2093 const char *dont_complete_typenames_cstr = 2094 getenv("LLDB_DWARF_DONT_COMPLETE_TYPENAMES"); 2095 if (dont_complete_typenames_cstr && dont_complete_typenames_cstr[0]) { 2096 const char *die_name = die.GetName(); 2097 if (die_name && die_name[0]) { 2098 const char *match = strstr(dont_complete_typenames_cstr, die_name); 2099 if (match) { 2100 size_t die_name_length = strlen(die_name); 2101 while (match) { 2102 const char separator_char = ';'; 2103 const char next_char = match[die_name_length]; 2104 if (next_char == '\0' || next_char == separator_char) { 2105 if (match == dont_complete_typenames_cstr || 2106 match[-1] == separator_char) 2107 return false; 2108 } 2109 match = strstr(match + 1, die_name); 2110 } 2111 } 2112 } 2113 } 2114 #endif 2115 2116 const dw_tag_t tag = die.Tag(); 2117 2118 Log *log = 2119 nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION)); 2120 if (log) 2121 dwarf->GetObjectFile()->GetModule()->LogMessageVerboseBacktrace( 2122 log, "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...", 2123 die.GetID(), die.GetTagAsCString(), type->GetName().AsCString()); 2124 assert(clang_type); 2125 DWARFAttributes attributes; 2126 switch (tag) { 2127 case DW_TAG_structure_type: 2128 case DW_TAG_union_type: 2129 case DW_TAG_class_type: { 2130 ClangASTImporter::LayoutInfo layout_info; 2131 2132 { 2133 if (die.HasChildren()) { 2134 LanguageType class_language = eLanguageTypeUnknown; 2135 if (ClangASTContext::IsObjCObjectOrInterfaceType(clang_type)) { 2136 class_language = eLanguageTypeObjC; 2137 // For objective C we don't start the definition when 2138 // the class is created. 2139 ClangASTContext::StartTagDeclarationDefinition(clang_type); 2140 } 2141 2142 int tag_decl_kind = -1; 2143 AccessType default_accessibility = eAccessNone; 2144 if (tag == DW_TAG_structure_type) { 2145 tag_decl_kind = clang::TTK_Struct; 2146 default_accessibility = eAccessPublic; 2147 } else if (tag == DW_TAG_union_type) { 2148 tag_decl_kind = clang::TTK_Union; 2149 default_accessibility = eAccessPublic; 2150 } else if (tag == DW_TAG_class_type) { 2151 tag_decl_kind = clang::TTK_Class; 2152 default_accessibility = eAccessPrivate; 2153 } 2154 2155 SymbolContext sc(die.GetLLDBCompileUnit()); 2156 std::vector<clang::CXXBaseSpecifier *> base_classes; 2157 std::vector<int> member_accessibilities; 2158 bool is_a_class = false; 2159 // Parse members and base classes first 2160 DWARFDIECollection member_function_dies; 2161 2162 DelayedPropertyList delayed_properties; 2163 ParseChildMembers(sc, die, clang_type, class_language, base_classes, 2164 member_accessibilities, member_function_dies, 2165 delayed_properties, default_accessibility, is_a_class, 2166 layout_info); 2167 2168 // Now parse any methods if there were any... 2169 size_t num_functions = member_function_dies.Size(); 2170 if (num_functions > 0) { 2171 for (size_t i = 0; i < num_functions; ++i) { 2172 dwarf->ResolveType(member_function_dies.GetDIEAtIndex(i)); 2173 } 2174 } 2175 2176 if (class_language == eLanguageTypeObjC) { 2177 ConstString class_name(clang_type.GetTypeName()); 2178 if (class_name) { 2179 DIEArray method_die_offsets; 2180 dwarf->GetObjCMethodDIEOffsets(class_name, method_die_offsets); 2181 2182 if (!method_die_offsets.empty()) { 2183 DWARFDebugInfo *debug_info = dwarf->DebugInfo(); 2184 2185 const size_t num_matches = method_die_offsets.size(); 2186 for (size_t i = 0; i < num_matches; ++i) { 2187 const DIERef &die_ref = method_die_offsets[i]; 2188 DWARFDIE method_die = debug_info->GetDIE(die_ref); 2189 2190 if (method_die) 2191 method_die.ResolveType(); 2192 } 2193 } 2194 2195 for (DelayedPropertyList::iterator pi = delayed_properties.begin(), 2196 pe = delayed_properties.end(); 2197 pi != pe; ++pi) 2198 pi->Finalize(); 2199 } 2200 } 2201 2202 // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we 2203 // need to tell the clang type it is actually a class. 2204 if (class_language != eLanguageTypeObjC) { 2205 if (is_a_class && tag_decl_kind != clang::TTK_Class) 2206 m_ast.SetTagTypeKind(ClangUtil::GetQualType(clang_type), 2207 clang::TTK_Class); 2208 } 2209 2210 // Since DW_TAG_structure_type gets used for both classes 2211 // and structures, we may need to set any DW_TAG_member 2212 // fields to have a "private" access if none was specified. 2213 // When we parsed the child members we tracked that actual 2214 // accessibility value for each DW_TAG_member in the 2215 // "member_accessibilities" array. If the value for the 2216 // member is zero, then it was set to the "default_accessibility" 2217 // which for structs was "public". Below we correct this 2218 // by setting any fields to "private" that weren't correctly 2219 // set. 2220 if (is_a_class && !member_accessibilities.empty()) { 2221 // This is a class and all members that didn't have 2222 // their access specified are private. 2223 m_ast.SetDefaultAccessForRecordFields( 2224 m_ast.GetAsRecordDecl(clang_type), eAccessPrivate, 2225 &member_accessibilities.front(), member_accessibilities.size()); 2226 } 2227 2228 if (!base_classes.empty()) { 2229 // Make sure all base classes refer to complete types and not 2230 // forward declarations. If we don't do this, clang will crash 2231 // with an assertion in the call to 2232 // clang_type.SetBaseClassesForClassType() 2233 for (auto &base_class : base_classes) { 2234 clang::TypeSourceInfo *type_source_info = 2235 base_class->getTypeSourceInfo(); 2236 if (type_source_info) { 2237 CompilerType base_class_type( 2238 &m_ast, type_source_info->getType().getAsOpaquePtr()); 2239 if (base_class_type.GetCompleteType() == false) { 2240 auto module = dwarf->GetObjectFile()->GetModule(); 2241 module->ReportError(":: Class '%s' has a base class '%s' which " 2242 "does not have a complete definition.", 2243 die.GetName(), 2244 base_class_type.GetTypeName().GetCString()); 2245 if (die.GetCU()->GetProducer() == 2246 DWARFCompileUnit::eProducerClang) 2247 module->ReportError(":: Try compiling the source file with " 2248 "-fno-limit-debug-info."); 2249 2250 // We have no choice other than to pretend that the base class 2251 // is complete. If we don't do this, clang will crash when we 2252 // call setBases() inside of 2253 // "clang_type.SetBaseClassesForClassType()" 2254 // below. Since we provide layout assistance, all ivars in this 2255 // class and other classes will be fine, this is the best we can 2256 // do 2257 // short of crashing. 2258 if (ClangASTContext::StartTagDeclarationDefinition( 2259 base_class_type)) { 2260 ClangASTContext::CompleteTagDeclarationDefinition( 2261 base_class_type); 2262 } 2263 } 2264 } 2265 } 2266 m_ast.SetBaseClassesForClassType(clang_type.GetOpaqueQualType(), 2267 &base_classes.front(), 2268 base_classes.size()); 2269 2270 // Clang will copy each CXXBaseSpecifier in "base_classes" 2271 // so we have to free them all. 2272 ClangASTContext::DeleteBaseClassSpecifiers(&base_classes.front(), 2273 base_classes.size()); 2274 } 2275 } 2276 } 2277 2278 ClangASTContext::BuildIndirectFields(clang_type); 2279 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 2280 2281 if (!layout_info.field_offsets.empty() || 2282 !layout_info.base_offsets.empty() || 2283 !layout_info.vbase_offsets.empty()) { 2284 if (type) 2285 layout_info.bit_size = type->GetByteSize() * 8; 2286 if (layout_info.bit_size == 0) 2287 layout_info.bit_size = 2288 die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 0) * 8; 2289 2290 clang::CXXRecordDecl *record_decl = 2291 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 2292 if (record_decl) { 2293 if (log) { 2294 ModuleSP module_sp = dwarf->GetObjectFile()->GetModule(); 2295 2296 if (module_sp) { 2297 module_sp->LogMessage( 2298 log, 2299 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) " 2300 "caching layout info for record_decl = %p, bit_size = %" PRIu64 2301 ", alignment = %" PRIu64 2302 ", field_offsets[%u], base_offsets[%u], vbase_offsets[%u])", 2303 static_cast<void *>(clang_type.GetOpaqueQualType()), 2304 static_cast<void *>(record_decl), layout_info.bit_size, 2305 layout_info.alignment, 2306 static_cast<uint32_t>(layout_info.field_offsets.size()), 2307 static_cast<uint32_t>(layout_info.base_offsets.size()), 2308 static_cast<uint32_t>(layout_info.vbase_offsets.size())); 2309 2310 uint32_t idx; 2311 { 2312 llvm::DenseMap<const clang::FieldDecl *, uint64_t>::const_iterator 2313 pos, 2314 end = layout_info.field_offsets.end(); 2315 for (idx = 0, pos = layout_info.field_offsets.begin(); pos != end; 2316 ++pos, ++idx) { 2317 module_sp->LogMessage( 2318 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2319 "%p) field[%u] = { bit_offset=%u, name='%s' }", 2320 static_cast<void *>(clang_type.GetOpaqueQualType()), idx, 2321 static_cast<uint32_t>(pos->second), 2322 pos->first->getNameAsString().c_str()); 2323 } 2324 } 2325 2326 { 2327 llvm::DenseMap<const clang::CXXRecordDecl *, 2328 clang::CharUnits>::const_iterator base_pos, 2329 base_end = layout_info.base_offsets.end(); 2330 for (idx = 0, base_pos = layout_info.base_offsets.begin(); 2331 base_pos != base_end; ++base_pos, ++idx) { 2332 module_sp->LogMessage( 2333 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2334 "%p) base[%u] = { byte_offset=%u, name='%s' }", 2335 clang_type.GetOpaqueQualType(), idx, 2336 (uint32_t)base_pos->second.getQuantity(), 2337 base_pos->first->getNameAsString().c_str()); 2338 } 2339 } 2340 { 2341 llvm::DenseMap<const clang::CXXRecordDecl *, 2342 clang::CharUnits>::const_iterator vbase_pos, 2343 vbase_end = layout_info.vbase_offsets.end(); 2344 for (idx = 0, vbase_pos = layout_info.vbase_offsets.begin(); 2345 vbase_pos != vbase_end; ++vbase_pos, ++idx) { 2346 module_sp->LogMessage( 2347 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2348 "%p) vbase[%u] = { byte_offset=%u, name='%s' }", 2349 static_cast<void *>(clang_type.GetOpaqueQualType()), idx, 2350 static_cast<uint32_t>(vbase_pos->second.getQuantity()), 2351 vbase_pos->first->getNameAsString().c_str()); 2352 } 2353 } 2354 } 2355 } 2356 GetClangASTImporter().InsertRecordDecl(record_decl, layout_info); 2357 } 2358 } 2359 } 2360 2361 return (bool)clang_type; 2362 2363 case DW_TAG_enumeration_type: 2364 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 2365 if (die.HasChildren()) { 2366 SymbolContext sc(die.GetLLDBCompileUnit()); 2367 bool is_signed = false; 2368 clang_type.IsIntegerType(is_signed); 2369 ParseChildEnumerators(sc, clang_type, is_signed, type->GetByteSize(), 2370 die); 2371 } 2372 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 2373 } 2374 return (bool)clang_type; 2375 2376 default: 2377 assert(false && "not a forward clang type decl!"); 2378 break; 2379 } 2380 2381 return false; 2382 } 2383 2384 std::vector<DWARFDIE> DWARFASTParserClang::GetDIEForDeclContext( 2385 lldb_private::CompilerDeclContext decl_context) { 2386 std::vector<DWARFDIE> result; 2387 for (auto it = m_decl_ctx_to_die.find( 2388 (clang::DeclContext *)decl_context.GetOpaqueDeclContext()); 2389 it != m_decl_ctx_to_die.end(); it++) 2390 result.push_back(it->second); 2391 return result; 2392 } 2393 2394 CompilerDecl DWARFASTParserClang::GetDeclForUIDFromDWARF(const DWARFDIE &die) { 2395 clang::Decl *clang_decl = GetClangDeclForDIE(die); 2396 if (clang_decl != nullptr) 2397 return CompilerDecl(&m_ast, clang_decl); 2398 return CompilerDecl(); 2399 } 2400 2401 CompilerDeclContext 2402 DWARFASTParserClang::GetDeclContextForUIDFromDWARF(const DWARFDIE &die) { 2403 clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE(die); 2404 if (clang_decl_ctx) 2405 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2406 return CompilerDeclContext(); 2407 } 2408 2409 CompilerDeclContext 2410 DWARFASTParserClang::GetDeclContextContainingUIDFromDWARF(const DWARFDIE &die) { 2411 clang::DeclContext *clang_decl_ctx = 2412 GetClangDeclContextContainingDIE(die, nullptr); 2413 if (clang_decl_ctx) 2414 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2415 return CompilerDeclContext(); 2416 } 2417 2418 size_t DWARFASTParserClang::ParseChildEnumerators( 2419 const SymbolContext &sc, lldb_private::CompilerType &clang_type, 2420 bool is_signed, uint32_t enumerator_byte_size, const DWARFDIE &parent_die) { 2421 if (!parent_die) 2422 return 0; 2423 2424 size_t enumerators_added = 0; 2425 2426 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2427 die = die.GetSibling()) { 2428 const dw_tag_t tag = die.Tag(); 2429 if (tag == DW_TAG_enumerator) { 2430 DWARFAttributes attributes; 2431 const size_t num_child_attributes = die.GetAttributes(attributes); 2432 if (num_child_attributes > 0) { 2433 const char *name = NULL; 2434 bool got_value = false; 2435 int64_t enum_value = 0; 2436 Declaration decl; 2437 2438 uint32_t i; 2439 for (i = 0; i < num_child_attributes; ++i) { 2440 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2441 DWARFFormValue form_value; 2442 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2443 switch (attr) { 2444 case DW_AT_const_value: 2445 got_value = true; 2446 if (is_signed) 2447 enum_value = form_value.Signed(); 2448 else 2449 enum_value = form_value.Unsigned(); 2450 break; 2451 2452 case DW_AT_name: 2453 name = form_value.AsCString(); 2454 break; 2455 2456 case DW_AT_description: 2457 default: 2458 case DW_AT_decl_file: 2459 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 2460 form_value.Unsigned())); 2461 break; 2462 case DW_AT_decl_line: 2463 decl.SetLine(form_value.Unsigned()); 2464 break; 2465 case DW_AT_decl_column: 2466 decl.SetColumn(form_value.Unsigned()); 2467 break; 2468 case DW_AT_sibling: 2469 break; 2470 } 2471 } 2472 } 2473 2474 if (name && name[0] && got_value) { 2475 m_ast.AddEnumerationValueToEnumerationType( 2476 clang_type.GetOpaqueQualType(), 2477 m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType()), 2478 decl, name, enum_value, enumerator_byte_size * 8); 2479 ++enumerators_added; 2480 } 2481 } 2482 } 2483 } 2484 return enumerators_added; 2485 } 2486 2487 #if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE) 2488 2489 class DIEStack { 2490 public: 2491 void Push(const DWARFDIE &die) { m_dies.push_back(die); } 2492 2493 void LogDIEs(Log *log) { 2494 StreamString log_strm; 2495 const size_t n = m_dies.size(); 2496 log_strm.Printf("DIEStack[%" PRIu64 "]:\n", (uint64_t)n); 2497 for (size_t i = 0; i < n; i++) { 2498 std::string qualified_name; 2499 const DWARFDIE &die = m_dies[i]; 2500 die.GetQualifiedName(qualified_name); 2501 log_strm.Printf("[%" PRIu64 "] 0x%8.8x: %s name='%s'\n", (uint64_t)i, 2502 die.GetOffset(), die.GetTagAsCString(), 2503 qualified_name.c_str()); 2504 } 2505 log->PutCString(log_strm.GetData()); 2506 } 2507 void Pop() { m_dies.pop_back(); } 2508 2509 class ScopedPopper { 2510 public: 2511 ScopedPopper(DIEStack &die_stack) 2512 : m_die_stack(die_stack), m_valid(false) {} 2513 2514 void Push(const DWARFDIE &die) { 2515 m_valid = true; 2516 m_die_stack.Push(die); 2517 } 2518 2519 ~ScopedPopper() { 2520 if (m_valid) 2521 m_die_stack.Pop(); 2522 } 2523 2524 protected: 2525 DIEStack &m_die_stack; 2526 bool m_valid; 2527 }; 2528 2529 protected: 2530 typedef std::vector<DWARFDIE> Stack; 2531 Stack m_dies; 2532 }; 2533 #endif 2534 2535 Function *DWARFASTParserClang::ParseFunctionFromDWARF(const SymbolContext &sc, 2536 const DWARFDIE &die) { 2537 DWARFRangeList func_ranges; 2538 const char *name = NULL; 2539 const char *mangled = NULL; 2540 int decl_file = 0; 2541 int decl_line = 0; 2542 int decl_column = 0; 2543 int call_file = 0; 2544 int call_line = 0; 2545 int call_column = 0; 2546 DWARFExpression frame_base(die.GetCU()); 2547 2548 const dw_tag_t tag = die.Tag(); 2549 2550 if (tag != DW_TAG_subprogram) 2551 return NULL; 2552 2553 if (die.GetDIENamesAndRanges(name, mangled, func_ranges, decl_file, decl_line, 2554 decl_column, call_file, call_line, call_column, 2555 &frame_base)) { 2556 2557 // Union of all ranges in the function DIE (if the function is 2558 // discontiguous) 2559 AddressRange func_range; 2560 lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase(0); 2561 lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd(0); 2562 if (lowest_func_addr != LLDB_INVALID_ADDRESS && 2563 lowest_func_addr <= highest_func_addr) { 2564 ModuleSP module_sp(die.GetModule()); 2565 func_range.GetBaseAddress().ResolveAddressUsingFileSections( 2566 lowest_func_addr, module_sp->GetSectionList()); 2567 if (func_range.GetBaseAddress().IsValid()) 2568 func_range.SetByteSize(highest_func_addr - lowest_func_addr); 2569 } 2570 2571 if (func_range.GetBaseAddress().IsValid()) { 2572 Mangled func_name; 2573 if (mangled) 2574 func_name.SetValue(ConstString(mangled), true); 2575 else if (die.GetParent().Tag() == DW_TAG_compile_unit && 2576 Language::LanguageIsCPlusPlus(die.GetLanguage()) && name && 2577 strcmp(name, "main") != 0) { 2578 // If the mangled name is not present in the DWARF, generate the 2579 // demangled name 2580 // using the decl context. We skip if the function is "main" as its name 2581 // is 2582 // never mangled. 2583 bool is_static = false; 2584 bool is_variadic = false; 2585 bool has_template_params = false; 2586 unsigned type_quals = 0; 2587 std::vector<CompilerType> param_types; 2588 std::vector<clang::ParmVarDecl *> param_decls; 2589 DWARFDeclContext decl_ctx; 2590 StreamString sstr; 2591 2592 die.GetDWARFDeclContext(decl_ctx); 2593 sstr << decl_ctx.GetQualifiedName(); 2594 2595 clang::DeclContext *containing_decl_ctx = 2596 GetClangDeclContextContainingDIE(die, nullptr); 2597 ParseChildParameters(sc, containing_decl_ctx, die, true, is_static, 2598 is_variadic, has_template_params, param_types, 2599 param_decls, type_quals); 2600 sstr << "("; 2601 for (size_t i = 0; i < param_types.size(); i++) { 2602 if (i > 0) 2603 sstr << ", "; 2604 sstr << param_types[i].GetTypeName(); 2605 } 2606 if (is_variadic) 2607 sstr << ", ..."; 2608 sstr << ")"; 2609 if (type_quals & clang::Qualifiers::Const) 2610 sstr << " const"; 2611 2612 func_name.SetValue(ConstString(sstr.GetString()), false); 2613 } else 2614 func_name.SetValue(ConstString(name), false); 2615 2616 FunctionSP func_sp; 2617 std::unique_ptr<Declaration> decl_ap; 2618 if (decl_file != 0 || decl_line != 0 || decl_column != 0) 2619 decl_ap.reset(new Declaration( 2620 sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file), 2621 decl_line, decl_column)); 2622 2623 SymbolFileDWARF *dwarf = die.GetDWARF(); 2624 // Supply the type _only_ if it has already been parsed 2625 Type *func_type = dwarf->GetDIEToType().lookup(die.GetDIE()); 2626 2627 assert(func_type == NULL || func_type != DIE_IS_BEING_PARSED); 2628 2629 if (dwarf->FixupAddress(func_range.GetBaseAddress())) { 2630 const user_id_t func_user_id = die.GetID(); 2631 func_sp.reset(new Function(sc.comp_unit, 2632 func_user_id, // UserID is the DIE offset 2633 func_user_id, func_name, func_type, 2634 func_range)); // first address range 2635 2636 if (func_sp.get() != NULL) { 2637 if (frame_base.IsValid()) 2638 func_sp->GetFrameBaseExpression() = frame_base; 2639 sc.comp_unit->AddFunction(func_sp); 2640 return func_sp.get(); 2641 } 2642 } 2643 } 2644 } 2645 return NULL; 2646 } 2647 2648 bool DWARFASTParserClang::ParseChildMembers( 2649 const SymbolContext &sc, const DWARFDIE &parent_die, 2650 CompilerType &class_clang_type, const LanguageType class_language, 2651 std::vector<clang::CXXBaseSpecifier *> &base_classes, 2652 std::vector<int> &member_accessibilities, 2653 DWARFDIECollection &member_function_dies, 2654 DelayedPropertyList &delayed_properties, AccessType &default_accessibility, 2655 bool &is_a_class, ClangASTImporter::LayoutInfo &layout_info) { 2656 if (!parent_die) 2657 return 0; 2658 2659 // Get the parent byte size so we can verify any members will fit 2660 const uint64_t parent_byte_size = 2661 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, UINT64_MAX); 2662 const uint64_t parent_bit_size = 2663 parent_byte_size == UINT64_MAX ? UINT64_MAX : parent_byte_size * 8; 2664 2665 uint32_t member_idx = 0; 2666 BitfieldInfo last_field_info; 2667 2668 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule(); 2669 ClangASTContext *ast = 2670 llvm::dyn_cast_or_null<ClangASTContext>(class_clang_type.GetTypeSystem()); 2671 if (ast == nullptr) 2672 return 0; 2673 2674 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2675 die = die.GetSibling()) { 2676 dw_tag_t tag = die.Tag(); 2677 2678 switch (tag) { 2679 case DW_TAG_member: 2680 case DW_TAG_APPLE_property: { 2681 DWARFAttributes attributes; 2682 const size_t num_attributes = die.GetAttributes(attributes); 2683 if (num_attributes > 0) { 2684 Declaration decl; 2685 // DWARFExpression location; 2686 const char *name = NULL; 2687 const char *prop_name = NULL; 2688 const char *prop_getter_name = NULL; 2689 const char *prop_setter_name = NULL; 2690 uint32_t prop_attributes = 0; 2691 2692 bool is_artificial = false; 2693 DWARFFormValue encoding_form; 2694 AccessType accessibility = eAccessNone; 2695 uint32_t member_byte_offset = 2696 (parent_die.Tag() == DW_TAG_union_type) ? 0 : UINT32_MAX; 2697 size_t byte_size = 0; 2698 int64_t bit_offset = 0; 2699 uint64_t data_bit_offset = UINT64_MAX; 2700 size_t bit_size = 0; 2701 bool is_external = 2702 false; // On DW_TAG_members, this means the member is static 2703 uint32_t i; 2704 for (i = 0; i < num_attributes && !is_artificial; ++i) { 2705 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2706 DWARFFormValue form_value; 2707 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2708 switch (attr) { 2709 case DW_AT_decl_file: 2710 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 2711 form_value.Unsigned())); 2712 break; 2713 case DW_AT_decl_line: 2714 decl.SetLine(form_value.Unsigned()); 2715 break; 2716 case DW_AT_decl_column: 2717 decl.SetColumn(form_value.Unsigned()); 2718 break; 2719 case DW_AT_name: 2720 name = form_value.AsCString(); 2721 break; 2722 case DW_AT_type: 2723 encoding_form = form_value; 2724 break; 2725 case DW_AT_bit_offset: 2726 bit_offset = form_value.Signed(); 2727 break; 2728 case DW_AT_bit_size: 2729 bit_size = form_value.Unsigned(); 2730 break; 2731 case DW_AT_byte_size: 2732 byte_size = form_value.Unsigned(); 2733 break; 2734 case DW_AT_data_bit_offset: 2735 data_bit_offset = form_value.Unsigned(); 2736 break; 2737 case DW_AT_data_member_location: 2738 if (form_value.BlockData()) { 2739 Value initialValue(0); 2740 Value memberOffset(0); 2741 const DWARFDataExtractor &debug_info_data = 2742 die.GetDWARF()->get_debug_info_data(); 2743 uint32_t block_length = form_value.Unsigned(); 2744 uint32_t block_offset = 2745 form_value.BlockData() - debug_info_data.GetDataStart(); 2746 if (DWARFExpression::Evaluate( 2747 nullptr, // ExecutionContext * 2748 nullptr, // RegisterContext * 2749 module_sp, debug_info_data, die.GetCU(), block_offset, 2750 block_length, eRegisterKindDWARF, &initialValue, 2751 nullptr, memberOffset, nullptr)) { 2752 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 2753 } 2754 } else { 2755 // With DWARF 3 and later, if the value is an integer constant, 2756 // this form value is the offset in bytes from the beginning 2757 // of the containing entity. 2758 member_byte_offset = form_value.Unsigned(); 2759 } 2760 break; 2761 2762 case DW_AT_accessibility: 2763 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 2764 break; 2765 case DW_AT_artificial: 2766 is_artificial = form_value.Boolean(); 2767 break; 2768 case DW_AT_APPLE_property_name: 2769 prop_name = form_value.AsCString(); 2770 break; 2771 case DW_AT_APPLE_property_getter: 2772 prop_getter_name = form_value.AsCString(); 2773 break; 2774 case DW_AT_APPLE_property_setter: 2775 prop_setter_name = form_value.AsCString(); 2776 break; 2777 case DW_AT_APPLE_property_attribute: 2778 prop_attributes = form_value.Unsigned(); 2779 break; 2780 case DW_AT_external: 2781 is_external = form_value.Boolean(); 2782 break; 2783 2784 default: 2785 case DW_AT_declaration: 2786 case DW_AT_description: 2787 case DW_AT_mutable: 2788 case DW_AT_visibility: 2789 case DW_AT_sibling: 2790 break; 2791 } 2792 } 2793 } 2794 2795 if (prop_name) { 2796 ConstString fixed_getter; 2797 ConstString fixed_setter; 2798 2799 // Check if the property getter/setter were provided as full 2800 // names. We want basenames, so we extract them. 2801 2802 if (prop_getter_name && prop_getter_name[0] == '-') { 2803 ObjCLanguage::MethodName prop_getter_method(prop_getter_name, true); 2804 prop_getter_name = prop_getter_method.GetSelector().GetCString(); 2805 } 2806 2807 if (prop_setter_name && prop_setter_name[0] == '-') { 2808 ObjCLanguage::MethodName prop_setter_method(prop_setter_name, true); 2809 prop_setter_name = prop_setter_method.GetSelector().GetCString(); 2810 } 2811 2812 // If the names haven't been provided, they need to be 2813 // filled in. 2814 2815 if (!prop_getter_name) { 2816 prop_getter_name = prop_name; 2817 } 2818 if (!prop_setter_name && prop_name[0] && 2819 !(prop_attributes & DW_APPLE_PROPERTY_readonly)) { 2820 StreamString ss; 2821 2822 ss.Printf("set%c%s:", toupper(prop_name[0]), &prop_name[1]); 2823 2824 fixed_setter.SetString(ss.GetString()); 2825 prop_setter_name = fixed_setter.GetCString(); 2826 } 2827 } 2828 2829 // Clang has a DWARF generation bug where sometimes it 2830 // represents fields that are references with bad byte size 2831 // and bit size/offset information such as: 2832 // 2833 // DW_AT_byte_size( 0x00 ) 2834 // DW_AT_bit_size( 0x40 ) 2835 // DW_AT_bit_offset( 0xffffffffffffffc0 ) 2836 // 2837 // So check the bit offset to make sure it is sane, and if 2838 // the values are not sane, remove them. If we don't do this 2839 // then we will end up with a crash if we try to use this 2840 // type in an expression when clang becomes unhappy with its 2841 // recycled debug info. 2842 2843 if (byte_size == 0 && bit_offset < 0) { 2844 bit_size = 0; 2845 bit_offset = 0; 2846 } 2847 2848 // FIXME: Make Clang ignore Objective-C accessibility for expressions 2849 if (class_language == eLanguageTypeObjC || 2850 class_language == eLanguageTypeObjC_plus_plus) 2851 accessibility = eAccessNone; 2852 2853 if (member_idx == 0 && !is_artificial && name && 2854 (strstr(name, "_vptr$") == name)) { 2855 // Not all compilers will mark the vtable pointer 2856 // member as artificial (llvm-gcc). We can't have 2857 // the virtual members in our classes otherwise it 2858 // throws off all child offsets since we end up 2859 // having and extra pointer sized member in our 2860 // class layouts. 2861 is_artificial = true; 2862 } 2863 2864 // Handle static members 2865 if (is_external && member_byte_offset == UINT32_MAX) { 2866 Type *var_type = die.ResolveTypeUID(DIERef(encoding_form)); 2867 2868 if (var_type) { 2869 if (accessibility == eAccessNone) 2870 accessibility = eAccessPublic; 2871 ClangASTContext::AddVariableToRecordType( 2872 class_clang_type, name, var_type->GetLayoutCompilerType(), 2873 accessibility); 2874 } 2875 break; 2876 } 2877 2878 if (is_artificial == false) { 2879 Type *member_type = die.ResolveTypeUID(DIERef(encoding_form)); 2880 2881 clang::FieldDecl *field_decl = NULL; 2882 if (tag == DW_TAG_member) { 2883 if (member_type) { 2884 if (accessibility == eAccessNone) 2885 accessibility = default_accessibility; 2886 member_accessibilities.push_back(accessibility); 2887 2888 uint64_t field_bit_offset = 2889 (member_byte_offset == UINT32_MAX ? 0 2890 : (member_byte_offset * 8)); 2891 if (bit_size > 0) { 2892 2893 BitfieldInfo this_field_info; 2894 this_field_info.bit_offset = field_bit_offset; 2895 this_field_info.bit_size = bit_size; 2896 2897 ///////////////////////////////////////////////////////////// 2898 // How to locate a field given the DWARF debug information 2899 // 2900 // AT_byte_size indicates the size of the word in which the 2901 // bit offset must be interpreted. 2902 // 2903 // AT_data_member_location indicates the byte offset of the 2904 // word from the base address of the structure. 2905 // 2906 // AT_bit_offset indicates how many bits into the word 2907 // (according to the host endianness) the low-order bit of 2908 // the field starts. AT_bit_offset can be negative. 2909 // 2910 // AT_bit_size indicates the size of the field in bits. 2911 ///////////////////////////////////////////////////////////// 2912 2913 if (data_bit_offset != UINT64_MAX) { 2914 this_field_info.bit_offset = data_bit_offset; 2915 } else { 2916 if (byte_size == 0) 2917 byte_size = member_type->GetByteSize(); 2918 2919 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 2920 if (objfile->GetByteOrder() == eByteOrderLittle) { 2921 this_field_info.bit_offset += byte_size * 8; 2922 this_field_info.bit_offset -= (bit_offset + bit_size); 2923 } else { 2924 this_field_info.bit_offset += bit_offset; 2925 } 2926 } 2927 2928 if ((this_field_info.bit_offset >= parent_bit_size) || 2929 !last_field_info.NextBitfieldOffsetIsValid( 2930 this_field_info.bit_offset)) { 2931 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 2932 objfile->GetModule()->ReportWarning( 2933 "0x%8.8" PRIx64 ": %s bitfield named \"%s\" has invalid " 2934 "bit offset (0x%8.8" PRIx64 2935 ") member will be ignored. Please file a bug against the " 2936 "compiler and include the preprocessed output for %s\n", 2937 die.GetID(), DW_TAG_value_to_name(tag), name, 2938 this_field_info.bit_offset, 2939 sc.comp_unit ? sc.comp_unit->GetPath().c_str() 2940 : "the source file"); 2941 this_field_info.Clear(); 2942 continue; 2943 } 2944 2945 // Update the field bit offset we will report for layout 2946 field_bit_offset = this_field_info.bit_offset; 2947 2948 // If the member to be emitted did not start on a character 2949 // boundary and there is 2950 // empty space between the last field and this one, then we need 2951 // to emit an 2952 // anonymous member filling up the space up to its start. There 2953 // are three cases 2954 // here: 2955 // 2956 // 1 If the previous member ended on a character boundary, then 2957 // we can emit an 2958 // anonymous member starting at the most recent character 2959 // boundary. 2960 // 2961 // 2 If the previous member did not end on a character boundary 2962 // and the distance 2963 // from the end of the previous member to the current member 2964 // is less than a 2965 // word width, then we can emit an anonymous member starting 2966 // right after the 2967 // previous member and right before this member. 2968 // 2969 // 3 If the previous member did not end on a character boundary 2970 // and the distance 2971 // from the end of the previous member to the current member 2972 // is greater than 2973 // or equal a word width, then we act as in Case 1. 2974 2975 const uint64_t character_width = 8; 2976 const uint64_t word_width = 32; 2977 2978 // Objective-C has invalid DW_AT_bit_offset values in older 2979 // versions 2980 // of clang, so we have to be careful and only insert unnamed 2981 // bitfields 2982 // if we have a new enough clang. 2983 bool detect_unnamed_bitfields = true; 2984 2985 if (class_language == eLanguageTypeObjC || 2986 class_language == eLanguageTypeObjC_plus_plus) 2987 detect_unnamed_bitfields = 2988 die.GetCU()->Supports_unnamed_objc_bitfields(); 2989 2990 if (detect_unnamed_bitfields) { 2991 BitfieldInfo anon_field_info; 2992 2993 if ((this_field_info.bit_offset % character_width) != 2994 0) // not char aligned 2995 { 2996 uint64_t last_field_end = 0; 2997 2998 if (last_field_info.IsValid()) 2999 last_field_end = 3000 last_field_info.bit_offset + last_field_info.bit_size; 3001 3002 if (this_field_info.bit_offset != last_field_end) { 3003 if (((last_field_end % character_width) == 0) || // case 1 3004 (this_field_info.bit_offset - last_field_end >= 3005 word_width)) // case 3 3006 { 3007 anon_field_info.bit_size = 3008 this_field_info.bit_offset % character_width; 3009 anon_field_info.bit_offset = 3010 this_field_info.bit_offset - 3011 anon_field_info.bit_size; 3012 } else // case 2 3013 { 3014 anon_field_info.bit_size = 3015 this_field_info.bit_offset - last_field_end; 3016 anon_field_info.bit_offset = last_field_end; 3017 } 3018 } 3019 } 3020 3021 if (anon_field_info.IsValid()) { 3022 clang::FieldDecl *unnamed_bitfield_decl = 3023 ClangASTContext::AddFieldToRecordType( 3024 class_clang_type, NULL, 3025 m_ast.GetBuiltinTypeForEncodingAndBitSize( 3026 eEncodingSint, word_width), 3027 accessibility, anon_field_info.bit_size); 3028 3029 layout_info.field_offsets.insert(std::make_pair( 3030 unnamed_bitfield_decl, anon_field_info.bit_offset)); 3031 } 3032 } 3033 last_field_info = this_field_info; 3034 } else { 3035 last_field_info.Clear(); 3036 } 3037 3038 CompilerType member_clang_type = 3039 member_type->GetLayoutCompilerType(); 3040 if (!member_clang_type.IsCompleteType()) 3041 member_clang_type.GetCompleteType(); 3042 3043 { 3044 // Older versions of clang emit array[0] and array[1] in the 3045 // same way (<rdar://problem/12566646>). 3046 // If the current field is at the end of the structure, then 3047 // there is definitely no room for extra 3048 // elements and we override the type to array[0]. 3049 3050 CompilerType member_array_element_type; 3051 uint64_t member_array_size; 3052 bool member_array_is_incomplete; 3053 3054 if (member_clang_type.IsArrayType( 3055 &member_array_element_type, &member_array_size, 3056 &member_array_is_incomplete) && 3057 !member_array_is_incomplete) { 3058 uint64_t parent_byte_size = 3059 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 3060 UINT64_MAX); 3061 3062 if (member_byte_offset >= parent_byte_size) { 3063 if (member_array_size != 1 && 3064 (member_array_size != 0 || 3065 member_byte_offset > parent_byte_size)) { 3066 module_sp->ReportError( 3067 "0x%8.8" PRIx64 3068 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 3069 " which extends beyond the bounds of 0x%8.8" PRIx64, 3070 die.GetID(), name, encoding_form.Reference(), 3071 parent_die.GetID()); 3072 } 3073 3074 member_clang_type = m_ast.CreateArrayType( 3075 member_array_element_type, 0, false); 3076 } 3077 } 3078 } 3079 3080 if (ClangASTContext::IsCXXClassType(member_clang_type) && 3081 member_clang_type.GetCompleteType() == false) { 3082 if (die.GetCU()->GetProducer() == 3083 DWARFCompileUnit::eProducerClang) 3084 module_sp->ReportError( 3085 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3086 "0x%8.8x (%s) whose type is a forward declaration, not a " 3087 "complete definition.\nTry compiling the source file " 3088 "with -fno-limit-debug-info", 3089 parent_die.GetOffset(), parent_die.GetName(), 3090 die.GetOffset(), name); 3091 else 3092 module_sp->ReportError( 3093 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3094 "0x%8.8x (%s) whose type is a forward declaration, not a " 3095 "complete definition.\nPlease file a bug against the " 3096 "compiler and include the preprocessed output for %s", 3097 parent_die.GetOffset(), parent_die.GetName(), 3098 die.GetOffset(), name, 3099 sc.comp_unit ? sc.comp_unit->GetPath().c_str() 3100 : "the source file"); 3101 // We have no choice other than to pretend that the member class 3102 // is complete. If we don't do this, clang will crash when 3103 // trying 3104 // to layout the class. Since we provide layout assistance, all 3105 // ivars in this class and other classes will be fine, this is 3106 // the best we can do short of crashing. 3107 if (ClangASTContext::StartTagDeclarationDefinition( 3108 member_clang_type)) { 3109 ClangASTContext::CompleteTagDeclarationDefinition( 3110 member_clang_type); 3111 } else { 3112 module_sp->ReportError( 3113 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3114 "0x%8.8x (%s) whose type claims to be a C++ class but we " 3115 "were not able to start its definition.\nPlease file a " 3116 "bug and attach the file at the start of this error " 3117 "message", 3118 parent_die.GetOffset(), parent_die.GetName(), 3119 die.GetOffset(), name); 3120 } 3121 } 3122 3123 field_decl = ClangASTContext::AddFieldToRecordType( 3124 class_clang_type, name, member_clang_type, accessibility, 3125 bit_size); 3126 3127 m_ast.SetMetadataAsUserID(field_decl, die.GetID()); 3128 3129 layout_info.field_offsets.insert( 3130 std::make_pair(field_decl, field_bit_offset)); 3131 } else { 3132 if (name) 3133 module_sp->ReportError( 3134 "0x%8.8" PRIx64 3135 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 3136 " which was unable to be parsed", 3137 die.GetID(), name, encoding_form.Reference()); 3138 else 3139 module_sp->ReportError( 3140 "0x%8.8" PRIx64 3141 ": DW_TAG_member refers to type 0x%8.8" PRIx64 3142 " which was unable to be parsed", 3143 die.GetID(), encoding_form.Reference()); 3144 } 3145 } 3146 3147 if (prop_name != NULL && member_type) { 3148 clang::ObjCIvarDecl *ivar_decl = NULL; 3149 3150 if (field_decl) { 3151 ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl); 3152 assert(ivar_decl != NULL); 3153 } 3154 3155 ClangASTMetadata metadata; 3156 metadata.SetUserID(die.GetID()); 3157 delayed_properties.push_back(DelayedAddObjCClassProperty( 3158 class_clang_type, prop_name, 3159 member_type->GetLayoutCompilerType(), ivar_decl, 3160 prop_setter_name, prop_getter_name, prop_attributes, 3161 &metadata)); 3162 3163 if (ivar_decl) 3164 m_ast.SetMetadataAsUserID(ivar_decl, die.GetID()); 3165 } 3166 } 3167 } 3168 ++member_idx; 3169 } break; 3170 3171 case DW_TAG_subprogram: 3172 // Let the type parsing code handle this one for us. 3173 member_function_dies.Append(die); 3174 break; 3175 3176 case DW_TAG_inheritance: { 3177 is_a_class = true; 3178 if (default_accessibility == eAccessNone) 3179 default_accessibility = eAccessPrivate; 3180 // TODO: implement DW_TAG_inheritance type parsing 3181 DWARFAttributes attributes; 3182 const size_t num_attributes = die.GetAttributes(attributes); 3183 if (num_attributes > 0) { 3184 Declaration decl; 3185 DWARFExpression location(die.GetCU()); 3186 DWARFFormValue encoding_form; 3187 AccessType accessibility = default_accessibility; 3188 bool is_virtual = false; 3189 bool is_base_of_class = true; 3190 off_t member_byte_offset = 0; 3191 uint32_t i; 3192 for (i = 0; i < num_attributes; ++i) { 3193 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3194 DWARFFormValue form_value; 3195 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3196 switch (attr) { 3197 case DW_AT_decl_file: 3198 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 3199 form_value.Unsigned())); 3200 break; 3201 case DW_AT_decl_line: 3202 decl.SetLine(form_value.Unsigned()); 3203 break; 3204 case DW_AT_decl_column: 3205 decl.SetColumn(form_value.Unsigned()); 3206 break; 3207 case DW_AT_type: 3208 encoding_form = form_value; 3209 break; 3210 case DW_AT_data_member_location: 3211 if (form_value.BlockData()) { 3212 Value initialValue(0); 3213 Value memberOffset(0); 3214 const DWARFDataExtractor &debug_info_data = 3215 die.GetDWARF()->get_debug_info_data(); 3216 uint32_t block_length = form_value.Unsigned(); 3217 uint32_t block_offset = 3218 form_value.BlockData() - debug_info_data.GetDataStart(); 3219 if (DWARFExpression::Evaluate(nullptr, nullptr, module_sp, 3220 debug_info_data, die.GetCU(), 3221 block_offset, block_length, 3222 eRegisterKindDWARF, &initialValue, 3223 nullptr, memberOffset, nullptr)) { 3224 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 3225 } 3226 } else { 3227 // With DWARF 3 and later, if the value is an integer constant, 3228 // this form value is the offset in bytes from the beginning 3229 // of the containing entity. 3230 member_byte_offset = form_value.Unsigned(); 3231 } 3232 break; 3233 3234 case DW_AT_accessibility: 3235 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 3236 break; 3237 3238 case DW_AT_virtuality: 3239 is_virtual = form_value.Boolean(); 3240 break; 3241 3242 case DW_AT_sibling: 3243 break; 3244 3245 default: 3246 break; 3247 } 3248 } 3249 } 3250 3251 Type *base_class_type = die.ResolveTypeUID(DIERef(encoding_form)); 3252 if (base_class_type == NULL) { 3253 module_sp->ReportError("0x%8.8x: DW_TAG_inheritance failed to " 3254 "resolve the base class at 0x%8.8" PRIx64 3255 " from enclosing type 0x%8.8x. \nPlease file " 3256 "a bug and attach the file at the start of " 3257 "this error message", 3258 die.GetOffset(), encoding_form.Reference(), 3259 parent_die.GetOffset()); 3260 break; 3261 } 3262 3263 CompilerType base_class_clang_type = 3264 base_class_type->GetFullCompilerType(); 3265 assert(base_class_clang_type); 3266 if (class_language == eLanguageTypeObjC) { 3267 ast->SetObjCSuperClass(class_clang_type, base_class_clang_type); 3268 } else { 3269 base_classes.push_back(ast->CreateBaseClassSpecifier( 3270 base_class_clang_type.GetOpaqueQualType(), accessibility, 3271 is_virtual, is_base_of_class)); 3272 3273 if (is_virtual) { 3274 // Do not specify any offset for virtual inheritance. The DWARF 3275 // produced by clang doesn't 3276 // give us a constant offset, but gives us a DWARF expressions that 3277 // requires an actual object 3278 // in memory. the DW_AT_data_member_location for a virtual base 3279 // class looks like: 3280 // DW_AT_data_member_location( DW_OP_dup, DW_OP_deref, 3281 // DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref, 3282 // DW_OP_plus ) 3283 // Given this, there is really no valid response we can give to 3284 // clang for virtual base 3285 // class offsets, and this should eventually be removed from 3286 // LayoutRecordType() in the external 3287 // AST source in clang. 3288 } else { 3289 layout_info.base_offsets.insert(std::make_pair( 3290 ast->GetAsCXXRecordDecl( 3291 base_class_clang_type.GetOpaqueQualType()), 3292 clang::CharUnits::fromQuantity(member_byte_offset))); 3293 } 3294 } 3295 } 3296 } break; 3297 3298 default: 3299 break; 3300 } 3301 } 3302 3303 return true; 3304 } 3305 3306 size_t DWARFASTParserClang::ParseChildParameters( 3307 const SymbolContext &sc, clang::DeclContext *containing_decl_ctx, 3308 const DWARFDIE &parent_die, bool skip_artificial, bool &is_static, 3309 bool &is_variadic, bool &has_template_params, 3310 std::vector<CompilerType> &function_param_types, 3311 std::vector<clang::ParmVarDecl *> &function_param_decls, 3312 unsigned &type_quals) { 3313 if (!parent_die) 3314 return 0; 3315 3316 size_t arg_idx = 0; 3317 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 3318 die = die.GetSibling()) { 3319 const dw_tag_t tag = die.Tag(); 3320 switch (tag) { 3321 case DW_TAG_formal_parameter: { 3322 DWARFAttributes attributes; 3323 const size_t num_attributes = die.GetAttributes(attributes); 3324 if (num_attributes > 0) { 3325 const char *name = NULL; 3326 Declaration decl; 3327 DWARFFormValue param_type_die_form; 3328 bool is_artificial = false; 3329 // one of None, Auto, Register, Extern, Static, PrivateExtern 3330 3331 clang::StorageClass storage = clang::SC_None; 3332 uint32_t i; 3333 for (i = 0; i < num_attributes; ++i) { 3334 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3335 DWARFFormValue form_value; 3336 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3337 switch (attr) { 3338 case DW_AT_decl_file: 3339 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 3340 form_value.Unsigned())); 3341 break; 3342 case DW_AT_decl_line: 3343 decl.SetLine(form_value.Unsigned()); 3344 break; 3345 case DW_AT_decl_column: 3346 decl.SetColumn(form_value.Unsigned()); 3347 break; 3348 case DW_AT_name: 3349 name = form_value.AsCString(); 3350 break; 3351 case DW_AT_type: 3352 param_type_die_form = form_value; 3353 break; 3354 case DW_AT_artificial: 3355 is_artificial = form_value.Boolean(); 3356 break; 3357 case DW_AT_location: 3358 // if (form_value.BlockData()) 3359 // { 3360 // const DWARFDataExtractor& 3361 // debug_info_data = debug_info(); 3362 // uint32_t block_length = 3363 // form_value.Unsigned(); 3364 // DWARFDataExtractor 3365 // location(debug_info_data, 3366 // form_value.BlockData() - 3367 // debug_info_data.GetDataStart(), 3368 // block_length); 3369 // } 3370 // else 3371 // { 3372 // } 3373 // break; 3374 case DW_AT_const_value: 3375 case DW_AT_default_value: 3376 case DW_AT_description: 3377 case DW_AT_endianity: 3378 case DW_AT_is_optional: 3379 case DW_AT_segment: 3380 case DW_AT_variable_parameter: 3381 default: 3382 case DW_AT_abstract_origin: 3383 case DW_AT_sibling: 3384 break; 3385 } 3386 } 3387 } 3388 3389 bool skip = false; 3390 if (skip_artificial) { 3391 if (is_artificial) { 3392 // In order to determine if a C++ member function is 3393 // "const" we have to look at the const-ness of "this"... 3394 // Ugly, but that 3395 if (arg_idx == 0) { 3396 if (DeclKindIsCXXClass(containing_decl_ctx->getDeclKind())) { 3397 // Often times compilers omit the "this" name for the 3398 // specification DIEs, so we can't rely upon the name 3399 // being in the formal parameter DIE... 3400 if (name == NULL || ::strcmp(name, "this") == 0) { 3401 Type *this_type = 3402 die.ResolveTypeUID(DIERef(param_type_die_form)); 3403 if (this_type) { 3404 uint32_t encoding_mask = this_type->GetEncodingMask(); 3405 if (encoding_mask & Type::eEncodingIsPointerUID) { 3406 is_static = false; 3407 3408 if (encoding_mask & (1u << Type::eEncodingIsConstUID)) 3409 type_quals |= clang::Qualifiers::Const; 3410 if (encoding_mask & (1u << Type::eEncodingIsVolatileUID)) 3411 type_quals |= clang::Qualifiers::Volatile; 3412 } 3413 } 3414 } 3415 } 3416 } 3417 skip = true; 3418 } else { 3419 3420 // HACK: Objective C formal parameters "self" and "_cmd" 3421 // are not marked as artificial in the DWARF... 3422 CompileUnit *comp_unit = die.GetLLDBCompileUnit(); 3423 if (comp_unit) { 3424 switch (comp_unit->GetLanguage()) { 3425 case eLanguageTypeObjC: 3426 case eLanguageTypeObjC_plus_plus: 3427 if (name && name[0] && 3428 (strcmp(name, "self") == 0 || strcmp(name, "_cmd") == 0)) 3429 skip = true; 3430 break; 3431 default: 3432 break; 3433 } 3434 } 3435 } 3436 } 3437 3438 if (!skip) { 3439 Type *type = die.ResolveTypeUID(DIERef(param_type_die_form)); 3440 if (type) { 3441 function_param_types.push_back(type->GetForwardCompilerType()); 3442 3443 clang::ParmVarDecl *param_var_decl = 3444 m_ast.CreateParameterDeclaration( 3445 name, type->GetForwardCompilerType(), storage); 3446 assert(param_var_decl); 3447 function_param_decls.push_back(param_var_decl); 3448 3449 m_ast.SetMetadataAsUserID(param_var_decl, die.GetID()); 3450 } 3451 } 3452 } 3453 arg_idx++; 3454 } break; 3455 3456 case DW_TAG_unspecified_parameters: 3457 is_variadic = true; 3458 break; 3459 3460 case DW_TAG_template_type_parameter: 3461 case DW_TAG_template_value_parameter: 3462 case DW_TAG_GNU_template_parameter_pack: 3463 // The one caller of this was never using the template_param_infos, 3464 // and the local variable was taking up a large amount of stack space 3465 // in SymbolFileDWARF::ParseType() so this was removed. If we ever need 3466 // the template params back, we can add them back. 3467 // ParseTemplateDIE (dwarf_cu, die, template_param_infos); 3468 has_template_params = true; 3469 break; 3470 3471 default: 3472 break; 3473 } 3474 } 3475 return arg_idx; 3476 } 3477 3478 void DWARFASTParserClang::ParseChildArrayInfo( 3479 const SymbolContext &sc, const DWARFDIE &parent_die, int64_t &first_index, 3480 std::vector<uint64_t> &element_orders, uint32_t &byte_stride, 3481 uint32_t &bit_stride) { 3482 if (!parent_die) 3483 return; 3484 3485 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 3486 die = die.GetSibling()) { 3487 const dw_tag_t tag = die.Tag(); 3488 switch (tag) { 3489 case DW_TAG_subrange_type: { 3490 DWARFAttributes attributes; 3491 const size_t num_child_attributes = die.GetAttributes(attributes); 3492 if (num_child_attributes > 0) { 3493 uint64_t num_elements = 0; 3494 uint64_t lower_bound = 0; 3495 uint64_t upper_bound = 0; 3496 bool upper_bound_valid = false; 3497 uint32_t i; 3498 for (i = 0; i < num_child_attributes; ++i) { 3499 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3500 DWARFFormValue form_value; 3501 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3502 switch (attr) { 3503 case DW_AT_name: 3504 break; 3505 3506 case DW_AT_count: 3507 num_elements = form_value.Unsigned(); 3508 break; 3509 3510 case DW_AT_bit_stride: 3511 bit_stride = form_value.Unsigned(); 3512 break; 3513 3514 case DW_AT_byte_stride: 3515 byte_stride = form_value.Unsigned(); 3516 break; 3517 3518 case DW_AT_lower_bound: 3519 lower_bound = form_value.Unsigned(); 3520 break; 3521 3522 case DW_AT_upper_bound: 3523 upper_bound_valid = true; 3524 upper_bound = form_value.Unsigned(); 3525 break; 3526 3527 default: 3528 case DW_AT_abstract_origin: 3529 case DW_AT_accessibility: 3530 case DW_AT_allocated: 3531 case DW_AT_associated: 3532 case DW_AT_data_location: 3533 case DW_AT_declaration: 3534 case DW_AT_description: 3535 case DW_AT_sibling: 3536 case DW_AT_threads_scaled: 3537 case DW_AT_type: 3538 case DW_AT_visibility: 3539 break; 3540 } 3541 } 3542 } 3543 3544 if (num_elements == 0) { 3545 if (upper_bound_valid && upper_bound >= lower_bound) 3546 num_elements = upper_bound - lower_bound + 1; 3547 } 3548 3549 element_orders.push_back(num_elements); 3550 } 3551 } break; 3552 } 3553 } 3554 } 3555 3556 Type *DWARFASTParserClang::GetTypeForDIE(const DWARFDIE &die) { 3557 if (die) { 3558 SymbolFileDWARF *dwarf = die.GetDWARF(); 3559 DWARFAttributes attributes; 3560 const size_t num_attributes = die.GetAttributes(attributes); 3561 if (num_attributes > 0) { 3562 DWARFFormValue type_die_form; 3563 for (size_t i = 0; i < num_attributes; ++i) { 3564 dw_attr_t attr = attributes.AttributeAtIndex(i); 3565 DWARFFormValue form_value; 3566 3567 if (attr == DW_AT_type && 3568 attributes.ExtractFormValueAtIndex(i, form_value)) 3569 return dwarf->ResolveTypeUID(dwarf->GetDIE(DIERef(form_value)), true); 3570 } 3571 } 3572 } 3573 3574 return nullptr; 3575 } 3576 3577 clang::Decl *DWARFASTParserClang::GetClangDeclForDIE(const DWARFDIE &die) { 3578 if (!die) 3579 return nullptr; 3580 3581 switch (die.Tag()) { 3582 case DW_TAG_variable: 3583 case DW_TAG_constant: 3584 case DW_TAG_formal_parameter: 3585 case DW_TAG_imported_declaration: 3586 case DW_TAG_imported_module: 3587 break; 3588 default: 3589 return nullptr; 3590 } 3591 3592 DIEToDeclMap::iterator cache_pos = m_die_to_decl.find(die.GetDIE()); 3593 if (cache_pos != m_die_to_decl.end()) 3594 return cache_pos->second; 3595 3596 if (DWARFDIE spec_die = die.GetReferencedDIE(DW_AT_specification)) { 3597 clang::Decl *decl = GetClangDeclForDIE(spec_die); 3598 m_die_to_decl[die.GetDIE()] = decl; 3599 m_decl_to_die[decl].insert(die.GetDIE()); 3600 return decl; 3601 } 3602 3603 if (DWARFDIE abstract_origin_die = 3604 die.GetReferencedDIE(DW_AT_abstract_origin)) { 3605 clang::Decl *decl = GetClangDeclForDIE(abstract_origin_die); 3606 m_die_to_decl[die.GetDIE()] = decl; 3607 m_decl_to_die[decl].insert(die.GetDIE()); 3608 return decl; 3609 } 3610 3611 clang::Decl *decl = nullptr; 3612 switch (die.Tag()) { 3613 case DW_TAG_variable: 3614 case DW_TAG_constant: 3615 case DW_TAG_formal_parameter: { 3616 SymbolFileDWARF *dwarf = die.GetDWARF(); 3617 Type *type = GetTypeForDIE(die); 3618 if (dwarf && type) { 3619 const char *name = die.GetName(); 3620 clang::DeclContext *decl_context = 3621 ClangASTContext::DeclContextGetAsDeclContext( 3622 dwarf->GetDeclContextContainingUID(die.GetID())); 3623 decl = m_ast.CreateVariableDeclaration( 3624 decl_context, name, 3625 ClangUtil::GetQualType(type->GetForwardCompilerType())); 3626 } 3627 break; 3628 } 3629 case DW_TAG_imported_declaration: { 3630 SymbolFileDWARF *dwarf = die.GetDWARF(); 3631 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3632 if (imported_uid) { 3633 CompilerDecl imported_decl = imported_uid.GetDecl(); 3634 if (imported_decl) { 3635 clang::DeclContext *decl_context = 3636 ClangASTContext::DeclContextGetAsDeclContext( 3637 dwarf->GetDeclContextContainingUID(die.GetID())); 3638 if (clang::NamedDecl *clang_imported_decl = 3639 llvm::dyn_cast<clang::NamedDecl>( 3640 (clang::Decl *)imported_decl.GetOpaqueDecl())) 3641 decl = 3642 m_ast.CreateUsingDeclaration(decl_context, clang_imported_decl); 3643 } 3644 } 3645 break; 3646 } 3647 case DW_TAG_imported_module: { 3648 SymbolFileDWARF *dwarf = die.GetDWARF(); 3649 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3650 3651 if (imported_uid) { 3652 CompilerDeclContext imported_decl_ctx = imported_uid.GetDeclContext(); 3653 if (imported_decl_ctx) { 3654 clang::DeclContext *decl_context = 3655 ClangASTContext::DeclContextGetAsDeclContext( 3656 dwarf->GetDeclContextContainingUID(die.GetID())); 3657 if (clang::NamespaceDecl *ns_decl = 3658 ClangASTContext::DeclContextGetAsNamespaceDecl( 3659 imported_decl_ctx)) 3660 decl = m_ast.CreateUsingDirectiveDeclaration(decl_context, ns_decl); 3661 } 3662 } 3663 break; 3664 } 3665 default: 3666 break; 3667 } 3668 3669 m_die_to_decl[die.GetDIE()] = decl; 3670 m_decl_to_die[decl].insert(die.GetDIE()); 3671 3672 return decl; 3673 } 3674 3675 clang::DeclContext * 3676 DWARFASTParserClang::GetClangDeclContextForDIE(const DWARFDIE &die) { 3677 if (die) { 3678 clang::DeclContext *decl_ctx = GetCachedClangDeclContextForDIE(die); 3679 if (decl_ctx) 3680 return decl_ctx; 3681 3682 bool try_parsing_type = true; 3683 switch (die.Tag()) { 3684 case DW_TAG_compile_unit: 3685 decl_ctx = m_ast.GetTranslationUnitDecl(); 3686 try_parsing_type = false; 3687 break; 3688 3689 case DW_TAG_namespace: 3690 decl_ctx = ResolveNamespaceDIE(die); 3691 try_parsing_type = false; 3692 break; 3693 3694 case DW_TAG_lexical_block: 3695 decl_ctx = GetDeclContextForBlock(die); 3696 try_parsing_type = false; 3697 break; 3698 3699 default: 3700 break; 3701 } 3702 3703 if (decl_ctx == nullptr && try_parsing_type) { 3704 Type *type = die.GetDWARF()->ResolveType(die); 3705 if (type) 3706 decl_ctx = GetCachedClangDeclContextForDIE(die); 3707 } 3708 3709 if (decl_ctx) { 3710 LinkDeclContextToDIE(decl_ctx, die); 3711 return decl_ctx; 3712 } 3713 } 3714 return nullptr; 3715 } 3716 3717 static bool IsSubroutine(const DWARFDIE &die) { 3718 switch (die.Tag()) { 3719 case DW_TAG_subprogram: 3720 case DW_TAG_inlined_subroutine: 3721 return true; 3722 default: 3723 return false; 3724 } 3725 } 3726 3727 static DWARFDIE GetContainingFunctionWithAbstractOrigin(const DWARFDIE &die) { 3728 for (DWARFDIE candidate = die; candidate; candidate = candidate.GetParent()) { 3729 if (IsSubroutine(candidate)) { 3730 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3731 return candidate; 3732 } else { 3733 return DWARFDIE(); 3734 } 3735 } 3736 } 3737 assert(0 && "Shouldn't call GetContainingFunctionWithAbstractOrigin on " 3738 "something not in a function"); 3739 return DWARFDIE(); 3740 } 3741 3742 static DWARFDIE FindAnyChildWithAbstractOrigin(const DWARFDIE &context) { 3743 for (DWARFDIE candidate = context.GetFirstChild(); candidate.IsValid(); 3744 candidate = candidate.GetSibling()) { 3745 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3746 return candidate; 3747 } 3748 } 3749 return DWARFDIE(); 3750 } 3751 3752 static DWARFDIE FindFirstChildWithAbstractOrigin(const DWARFDIE &block, 3753 const DWARFDIE &function) { 3754 assert(IsSubroutine(function)); 3755 for (DWARFDIE context = block; context != function.GetParent(); 3756 context = context.GetParent()) { 3757 assert(!IsSubroutine(context) || context == function); 3758 if (DWARFDIE child = FindAnyChildWithAbstractOrigin(context)) { 3759 return child; 3760 } 3761 } 3762 return DWARFDIE(); 3763 } 3764 3765 clang::DeclContext * 3766 DWARFASTParserClang::GetDeclContextForBlock(const DWARFDIE &die) { 3767 assert(die.Tag() == DW_TAG_lexical_block); 3768 DWARFDIE containing_function_with_abstract_origin = 3769 GetContainingFunctionWithAbstractOrigin(die); 3770 if (!containing_function_with_abstract_origin) { 3771 return (clang::DeclContext *)ResolveBlockDIE(die); 3772 } 3773 DWARFDIE child = FindFirstChildWithAbstractOrigin( 3774 die, containing_function_with_abstract_origin); 3775 CompilerDeclContext decl_context = 3776 GetDeclContextContainingUIDFromDWARF(child); 3777 return (clang::DeclContext *)decl_context.GetOpaqueDeclContext(); 3778 } 3779 3780 clang::BlockDecl *DWARFASTParserClang::ResolveBlockDIE(const DWARFDIE &die) { 3781 if (die && die.Tag() == DW_TAG_lexical_block) { 3782 clang::BlockDecl *decl = 3783 llvm::cast_or_null<clang::BlockDecl>(m_die_to_decl_ctx[die.GetDIE()]); 3784 3785 if (!decl) { 3786 DWARFDIE decl_context_die; 3787 clang::DeclContext *decl_context = 3788 GetClangDeclContextContainingDIE(die, &decl_context_die); 3789 decl = m_ast.CreateBlockDeclaration(decl_context); 3790 3791 if (decl) 3792 LinkDeclContextToDIE((clang::DeclContext *)decl, die); 3793 } 3794 3795 return decl; 3796 } 3797 return nullptr; 3798 } 3799 3800 clang::NamespaceDecl * 3801 DWARFASTParserClang::ResolveNamespaceDIE(const DWARFDIE &die) { 3802 if (die && die.Tag() == DW_TAG_namespace) { 3803 // See if we already parsed this namespace DIE and associated it with a 3804 // uniqued namespace declaration 3805 clang::NamespaceDecl *namespace_decl = 3806 static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die.GetDIE()]); 3807 if (namespace_decl) 3808 return namespace_decl; 3809 else { 3810 const char *namespace_name = die.GetName(); 3811 clang::DeclContext *containing_decl_ctx = 3812 GetClangDeclContextContainingDIE(die, nullptr); 3813 namespace_decl = m_ast.GetUniqueNamespaceDeclaration(namespace_name, 3814 containing_decl_ctx); 3815 Log *log = 3816 nullptr; // (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 3817 if (log) { 3818 SymbolFileDWARF *dwarf = die.GetDWARF(); 3819 if (namespace_name) { 3820 dwarf->GetObjectFile()->GetModule()->LogMessage( 3821 log, "ASTContext => %p: 0x%8.8" PRIx64 3822 ": DW_TAG_namespace with DW_AT_name(\"%s\") => " 3823 "clang::NamespaceDecl *%p (original = %p)", 3824 static_cast<void *>(m_ast.getASTContext()), die.GetID(), 3825 namespace_name, static_cast<void *>(namespace_decl), 3826 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3827 } else { 3828 dwarf->GetObjectFile()->GetModule()->LogMessage( 3829 log, "ASTContext => %p: 0x%8.8" PRIx64 3830 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p " 3831 "(original = %p)", 3832 static_cast<void *>(m_ast.getASTContext()), die.GetID(), 3833 static_cast<void *>(namespace_decl), 3834 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3835 } 3836 } 3837 3838 if (namespace_decl) 3839 LinkDeclContextToDIE((clang::DeclContext *)namespace_decl, die); 3840 return namespace_decl; 3841 } 3842 } 3843 return nullptr; 3844 } 3845 3846 clang::DeclContext *DWARFASTParserClang::GetClangDeclContextContainingDIE( 3847 const DWARFDIE &die, DWARFDIE *decl_ctx_die_copy) { 3848 SymbolFileDWARF *dwarf = die.GetDWARF(); 3849 3850 DWARFDIE decl_ctx_die = dwarf->GetDeclContextDIEContainingDIE(die); 3851 3852 if (decl_ctx_die_copy) 3853 *decl_ctx_die_copy = decl_ctx_die; 3854 3855 if (decl_ctx_die) { 3856 clang::DeclContext *clang_decl_ctx = 3857 GetClangDeclContextForDIE(decl_ctx_die); 3858 if (clang_decl_ctx) 3859 return clang_decl_ctx; 3860 } 3861 return m_ast.GetTranslationUnitDecl(); 3862 } 3863 3864 clang::DeclContext * 3865 DWARFASTParserClang::GetCachedClangDeclContextForDIE(const DWARFDIE &die) { 3866 if (die) { 3867 DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find(die.GetDIE()); 3868 if (pos != m_die_to_decl_ctx.end()) 3869 return pos->second; 3870 } 3871 return nullptr; 3872 } 3873 3874 void DWARFASTParserClang::LinkDeclContextToDIE(clang::DeclContext *decl_ctx, 3875 const DWARFDIE &die) { 3876 m_die_to_decl_ctx[die.GetDIE()] = decl_ctx; 3877 // There can be many DIEs for a single decl context 3878 // m_decl_ctx_to_die[decl_ctx].insert(die.GetDIE()); 3879 m_decl_ctx_to_die.insert(std::make_pair(decl_ctx, die)); 3880 } 3881 3882 bool DWARFASTParserClang::CopyUniqueClassMethodTypes( 3883 const DWARFDIE &src_class_die, const DWARFDIE &dst_class_die, 3884 lldb_private::Type *class_type, DWARFDIECollection &failures) { 3885 if (!class_type || !src_class_die || !dst_class_die) 3886 return false; 3887 if (src_class_die.Tag() != dst_class_die.Tag()) 3888 return false; 3889 3890 // We need to complete the class type so we can get all of the method types 3891 // parsed so we can then unique those types to their equivalent counterparts 3892 // in "dst_cu" and "dst_class_die" 3893 class_type->GetFullCompilerType(); 3894 3895 DWARFDIE src_die; 3896 DWARFDIE dst_die; 3897 UniqueCStringMap<DWARFDIE> src_name_to_die; 3898 UniqueCStringMap<DWARFDIE> dst_name_to_die; 3899 UniqueCStringMap<DWARFDIE> src_name_to_die_artificial; 3900 UniqueCStringMap<DWARFDIE> dst_name_to_die_artificial; 3901 for (src_die = src_class_die.GetFirstChild(); src_die.IsValid(); 3902 src_die = src_die.GetSibling()) { 3903 if (src_die.Tag() == DW_TAG_subprogram) { 3904 // Make sure this is a declaration and not a concrete instance by looking 3905 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3906 // are placed inside the class definitions and shouldn't be included in 3907 // the list of things are are tracking here. 3908 if (src_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 3909 const char *src_name = src_die.GetMangledName(); 3910 if (src_name) { 3911 ConstString src_const_name(src_name); 3912 if (src_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3913 src_name_to_die_artificial.Append(src_const_name, src_die); 3914 else 3915 src_name_to_die.Append(src_const_name, src_die); 3916 } 3917 } 3918 } 3919 } 3920 for (dst_die = dst_class_die.GetFirstChild(); dst_die.IsValid(); 3921 dst_die = dst_die.GetSibling()) { 3922 if (dst_die.Tag() == DW_TAG_subprogram) { 3923 // Make sure this is a declaration and not a concrete instance by looking 3924 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3925 // are placed inside the class definitions and shouldn't be included in 3926 // the list of things are are tracking here. 3927 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 3928 const char *dst_name = dst_die.GetMangledName(); 3929 if (dst_name) { 3930 ConstString dst_const_name(dst_name); 3931 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3932 dst_name_to_die_artificial.Append(dst_const_name, dst_die); 3933 else 3934 dst_name_to_die.Append(dst_const_name, dst_die); 3935 } 3936 } 3937 } 3938 } 3939 const uint32_t src_size = src_name_to_die.GetSize(); 3940 const uint32_t dst_size = dst_name_to_die.GetSize(); 3941 Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | 3942 // DWARF_LOG_TYPE_COMPLETION)); 3943 3944 // Is everything kosher so we can go through the members at top speed? 3945 bool fast_path = true; 3946 3947 if (src_size != dst_size) { 3948 if (src_size != 0 && dst_size != 0) { 3949 if (log) 3950 log->Printf("warning: trying to unique class DIE 0x%8.8x to 0x%8.8x, " 3951 "but they didn't have the same size (src=%d, dst=%d)", 3952 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3953 src_size, dst_size); 3954 } 3955 3956 fast_path = false; 3957 } 3958 3959 uint32_t idx; 3960 3961 if (fast_path) { 3962 for (idx = 0; idx < src_size; ++idx) { 3963 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 3964 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3965 3966 if (src_die.Tag() != dst_die.Tag()) { 3967 if (log) 3968 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 3969 "but 0x%8.8x (%s) tags didn't match 0x%8.8x (%s)", 3970 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3971 src_die.GetOffset(), src_die.GetTagAsCString(), 3972 dst_die.GetOffset(), dst_die.GetTagAsCString()); 3973 fast_path = false; 3974 } 3975 3976 const char *src_name = src_die.GetMangledName(); 3977 const char *dst_name = dst_die.GetMangledName(); 3978 3979 // Make sure the names match 3980 if (src_name == dst_name || (strcmp(src_name, dst_name) == 0)) 3981 continue; 3982 3983 if (log) 3984 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 3985 "but 0x%8.8x (%s) names didn't match 0x%8.8x (%s)", 3986 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3987 src_die.GetOffset(), src_name, dst_die.GetOffset(), 3988 dst_name); 3989 3990 fast_path = false; 3991 } 3992 } 3993 3994 DWARFASTParserClang *src_dwarf_ast_parser = 3995 (DWARFASTParserClang *)src_die.GetDWARFParser(); 3996 DWARFASTParserClang *dst_dwarf_ast_parser = 3997 (DWARFASTParserClang *)dst_die.GetDWARFParser(); 3998 3999 // Now do the work of linking the DeclContexts and Types. 4000 if (fast_path) { 4001 // We can do this quickly. Just run across the tables index-for-index since 4002 // we know each node has matching names and tags. 4003 for (idx = 0; idx < src_size; ++idx) { 4004 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 4005 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 4006 4007 clang::DeclContext *src_decl_ctx = 4008 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4009 if (src_decl_ctx) { 4010 if (log) 4011 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4012 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 4013 dst_die.GetOffset()); 4014 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 4015 } else { 4016 if (log) 4017 log->Printf("warning: tried to unique decl context from 0x%8.8x for " 4018 "0x%8.8x, but none was found", 4019 src_die.GetOffset(), dst_die.GetOffset()); 4020 } 4021 4022 Type *src_child_type = 4023 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4024 if (src_child_type) { 4025 if (log) 4026 log->Printf( 4027 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 4028 static_cast<void *>(src_child_type), src_child_type->GetID(), 4029 src_die.GetOffset(), dst_die.GetOffset()); 4030 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 4031 } else { 4032 if (log) 4033 log->Printf("warning: tried to unique lldb_private::Type from " 4034 "0x%8.8x for 0x%8.8x, but none was found", 4035 src_die.GetOffset(), dst_die.GetOffset()); 4036 } 4037 } 4038 } else { 4039 // We must do this slowly. For each member of the destination, look 4040 // up a member in the source with the same name, check its tag, and 4041 // unique them if everything matches up. Report failures. 4042 4043 if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty()) { 4044 src_name_to_die.Sort(); 4045 4046 for (idx = 0; idx < dst_size; ++idx) { 4047 ConstString dst_name = dst_name_to_die.GetCStringAtIndex(idx); 4048 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 4049 src_die = src_name_to_die.Find(dst_name, DWARFDIE()); 4050 4051 if (src_die && (src_die.Tag() == dst_die.Tag())) { 4052 clang::DeclContext *src_decl_ctx = 4053 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4054 if (src_decl_ctx) { 4055 if (log) 4056 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4057 static_cast<void *>(src_decl_ctx), 4058 src_die.GetOffset(), dst_die.GetOffset()); 4059 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 4060 } else { 4061 if (log) 4062 log->Printf("warning: tried to unique decl context from 0x%8.8x " 4063 "for 0x%8.8x, but none was found", 4064 src_die.GetOffset(), dst_die.GetOffset()); 4065 } 4066 4067 Type *src_child_type = 4068 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4069 if (src_child_type) { 4070 if (log) 4071 log->Printf("uniquing type %p (uid=0x%" PRIx64 4072 ") from 0x%8.8x for 0x%8.8x", 4073 static_cast<void *>(src_child_type), 4074 src_child_type->GetID(), src_die.GetOffset(), 4075 dst_die.GetOffset()); 4076 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = 4077 src_child_type; 4078 } else { 4079 if (log) 4080 log->Printf("warning: tried to unique lldb_private::Type from " 4081 "0x%8.8x for 0x%8.8x, but none was found", 4082 src_die.GetOffset(), dst_die.GetOffset()); 4083 } 4084 } else { 4085 if (log) 4086 log->Printf("warning: couldn't find a match for 0x%8.8x", 4087 dst_die.GetOffset()); 4088 4089 failures.Append(dst_die); 4090 } 4091 } 4092 } 4093 } 4094 4095 const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize(); 4096 const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize(); 4097 4098 if (src_size_artificial && dst_size_artificial) { 4099 dst_name_to_die_artificial.Sort(); 4100 4101 for (idx = 0; idx < src_size_artificial; ++idx) { 4102 ConstString src_name_artificial = 4103 src_name_to_die_artificial.GetCStringAtIndex(idx); 4104 src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 4105 dst_die = 4106 dst_name_to_die_artificial.Find(src_name_artificial, DWARFDIE()); 4107 4108 if (dst_die) { 4109 // Both classes have the artificial types, link them 4110 clang::DeclContext *src_decl_ctx = 4111 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4112 if (src_decl_ctx) { 4113 if (log) 4114 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4115 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 4116 dst_die.GetOffset()); 4117 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 4118 } else { 4119 if (log) 4120 log->Printf("warning: tried to unique decl context from 0x%8.8x " 4121 "for 0x%8.8x, but none was found", 4122 src_die.GetOffset(), dst_die.GetOffset()); 4123 } 4124 4125 Type *src_child_type = 4126 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4127 if (src_child_type) { 4128 if (log) 4129 log->Printf( 4130 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 4131 static_cast<void *>(src_child_type), src_child_type->GetID(), 4132 src_die.GetOffset(), dst_die.GetOffset()); 4133 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 4134 } else { 4135 if (log) 4136 log->Printf("warning: tried to unique lldb_private::Type from " 4137 "0x%8.8x for 0x%8.8x, but none was found", 4138 src_die.GetOffset(), dst_die.GetOffset()); 4139 } 4140 } 4141 } 4142 } 4143 4144 if (dst_size_artificial) { 4145 for (idx = 0; idx < dst_size_artificial; ++idx) { 4146 ConstString dst_name_artificial = 4147 dst_name_to_die_artificial.GetCStringAtIndex(idx); 4148 dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 4149 if (log) 4150 log->Printf("warning: need to create artificial method for 0x%8.8x for " 4151 "method '%s'", 4152 dst_die.GetOffset(), dst_name_artificial.GetCString()); 4153 4154 failures.Append(dst_die); 4155 } 4156 } 4157 4158 return (failures.Size() != 0); 4159 } 4160