DWARFASTParserClang.cpp revision 314564
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/Log.h" 25#include "lldb/Core/Module.h" 26#include "lldb/Core/StreamString.h" 27#include "lldb/Core/Value.h" 28#include "lldb/Host/Host.h" 29#include "lldb/Interpreter/Args.h" 30#include "lldb/Symbol/ClangASTImporter.h" 31#include "lldb/Symbol/ClangExternalASTSourceCommon.h" 32#include "lldb/Symbol/ClangUtil.h" 33#include "lldb/Symbol/CompileUnit.h" 34#include "lldb/Symbol/Function.h" 35#include "lldb/Symbol/ObjectFile.h" 36#include "lldb/Symbol/SymbolVendor.h" 37#include "lldb/Symbol/TypeList.h" 38#include "lldb/Symbol/TypeMap.h" 39#include "lldb/Target/Language.h" 40#include "lldb/Utility/LLDBAssert.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 57using namespace lldb; 58using namespace lldb_private; 59DWARFASTParserClang::DWARFASTParserClang(ClangASTContext &ast) 60 : m_ast(ast), m_die_to_decl_ctx(), m_decl_ctx_to_die() {} 61 62DWARFASTParserClang::~DWARFASTParserClang() {} 63 64static 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 78static 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 89struct 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 119ClangASTImporter &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 126TypeSP 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 179TypeSP 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 DWARFFormValue encoding_form; 931 932 const size_t num_attributes = die.GetAttributes(attributes); 933 if (num_attributes > 0) { 934 uint32_t i; 935 936 for (i = 0; i < num_attributes; ++i) { 937 attr = attributes.AttributeAtIndex(i); 938 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 939 switch (attr) { 940 case DW_AT_decl_file: 941 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 942 form_value.Unsigned())); 943 break; 944 case DW_AT_decl_line: 945 decl.SetLine(form_value.Unsigned()); 946 break; 947 case DW_AT_decl_column: 948 decl.SetColumn(form_value.Unsigned()); 949 break; 950 case DW_AT_name: 951 type_name_cstr = form_value.AsCString(); 952 type_name_const_str.SetCString(type_name_cstr); 953 break; 954 case DW_AT_type: 955 encoding_form = form_value; 956 break; 957 case DW_AT_byte_size: 958 byte_size = form_value.Unsigned(); 959 break; 960 case DW_AT_accessibility: 961 break; // accessibility = 962 // DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 963 case DW_AT_declaration: 964 is_forward_declaration = form_value.Boolean(); 965 break; 966 case DW_AT_allocated: 967 case DW_AT_associated: 968 case DW_AT_bit_stride: 969 case DW_AT_byte_stride: 970 case DW_AT_data_location: 971 case DW_AT_description: 972 case DW_AT_start_scope: 973 case DW_AT_visibility: 974 case DW_AT_specification: 975 case DW_AT_abstract_origin: 976 case DW_AT_sibling: 977 break; 978 } 979 } 980 } 981 982 if (is_forward_declaration) { 983 type_sp = ParseTypeFromDWO(die, log); 984 if (type_sp) 985 return type_sp; 986 987 DWARFDeclContext die_decl_ctx; 988 die.GetDWARFDeclContext(die_decl_ctx); 989 990 type_sp = 991 dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx); 992 993 if (!type_sp) { 994 SymbolFileDWARFDebugMap *debug_map_symfile = 995 dwarf->GetDebugMapSymfile(); 996 if (debug_map_symfile) { 997 // We weren't able to find a full declaration in 998 // this DWARF, see if we have a declaration anywhere 999 // else... 1000 type_sp = 1001 debug_map_symfile->FindDefinitionTypeForDWARFDeclContext( 1002 die_decl_ctx); 1003 } 1004 } 1005 1006 if (type_sp) { 1007 if (log) { 1008 dwarf->GetObjectFile()->GetModule()->LogMessage( 1009 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 1010 "forward declaration, complete type is 0x%8.8" PRIx64, 1011 static_cast<void *>(this), die.GetOffset(), 1012 DW_TAG_value_to_name(tag), type_name_cstr, 1013 type_sp->GetID()); 1014 } 1015 1016 // We found a real definition for this type elsewhere 1017 // so lets use it and cache the fact that we found 1018 // a complete type for this die 1019 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1020 clang::DeclContext *defn_decl_ctx = 1021 GetCachedClangDeclContextForDIE(dwarf->DebugInfo()->GetDIE( 1022 DIERef(type_sp->GetID(), dwarf))); 1023 if (defn_decl_ctx) 1024 LinkDeclContextToDIE(defn_decl_ctx, die); 1025 return type_sp; 1026 } 1027 } 1028 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1029 DW_TAG_value_to_name(tag), type_name_cstr); 1030 1031 CompilerType enumerator_clang_type; 1032 clang_type.SetCompilerType( 1033 &m_ast, 1034 dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE())); 1035 if (!clang_type) { 1036 if (encoding_form.IsValid()) { 1037 Type *enumerator_type = 1038 dwarf->ResolveTypeUID(DIERef(encoding_form)); 1039 if (enumerator_type) 1040 enumerator_clang_type = enumerator_type->GetFullCompilerType(); 1041 } 1042 1043 if (!enumerator_clang_type) { 1044 if (byte_size > 0) { 1045 enumerator_clang_type = 1046 m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize( 1047 NULL, DW_ATE_signed, byte_size * 8); 1048 } else { 1049 enumerator_clang_type = m_ast.GetBasicType(eBasicTypeInt); 1050 } 1051 } 1052 1053 clang_type = m_ast.CreateEnumerationType( 1054 type_name_cstr, GetClangDeclContextContainingDIE(die, nullptr), 1055 decl, enumerator_clang_type); 1056 } else { 1057 enumerator_clang_type = 1058 m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType()); 1059 } 1060 1061 LinkDeclContextToDIE( 1062 ClangASTContext::GetDeclContextForType(clang_type), die); 1063 1064 type_sp.reset(new Type( 1065 die.GetID(), dwarf, type_name_const_str, byte_size, NULL, 1066 DIERef(encoding_form).GetUID(dwarf), Type::eEncodingIsUID, &decl, 1067 clang_type, Type::eResolveStateForward)); 1068 1069 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 1070 if (die.HasChildren()) { 1071 SymbolContext cu_sc(die.GetLLDBCompileUnit()); 1072 bool is_signed = false; 1073 enumerator_clang_type.IsIntegerType(is_signed); 1074 ParseChildEnumerators(cu_sc, clang_type, is_signed, 1075 type_sp->GetByteSize(), die); 1076 } 1077 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 1078 } else { 1079 dwarf->GetObjectFile()->GetModule()->ReportError( 1080 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 1081 "definition.\nPlease file a bug and attach the file at the " 1082 "start of this error message", 1083 die.GetOffset(), type_name_cstr); 1084 } 1085 } 1086 } break; 1087 1088 case DW_TAG_inlined_subroutine: 1089 case DW_TAG_subprogram: 1090 case DW_TAG_subroutine_type: { 1091 // Set a bit that lets us know that we are currently parsing this 1092 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1093 1094 DWARFFormValue type_die_form; 1095 bool is_variadic = false; 1096 bool is_inline = false; 1097 bool is_static = false; 1098 bool is_virtual = false; 1099 bool is_explicit = false; 1100 bool is_artificial = false; 1101 bool has_template_params = false; 1102 DWARFFormValue specification_die_form; 1103 DWARFFormValue abstract_origin_die_form; 1104 dw_offset_t object_pointer_die_offset = DW_INVALID_OFFSET; 1105 1106 unsigned type_quals = 0; 1107 clang::StorageClass storage = 1108 clang::SC_None; //, Extern, Static, PrivateExtern 1109 1110 const size_t num_attributes = die.GetAttributes(attributes); 1111 if (num_attributes > 0) { 1112 uint32_t i; 1113 for (i = 0; i < num_attributes; ++i) { 1114 attr = attributes.AttributeAtIndex(i); 1115 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1116 switch (attr) { 1117 case DW_AT_decl_file: 1118 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 1119 form_value.Unsigned())); 1120 break; 1121 case DW_AT_decl_line: 1122 decl.SetLine(form_value.Unsigned()); 1123 break; 1124 case DW_AT_decl_column: 1125 decl.SetColumn(form_value.Unsigned()); 1126 break; 1127 case DW_AT_name: 1128 type_name_cstr = form_value.AsCString(); 1129 type_name_const_str.SetCString(type_name_cstr); 1130 break; 1131 1132 case DW_AT_linkage_name: 1133 case DW_AT_MIPS_linkage_name: 1134 break; // mangled = 1135 // form_value.AsCString(&dwarf->get_debug_str_data()); 1136 // break; 1137 case DW_AT_type: 1138 type_die_form = form_value; 1139 break; 1140 case DW_AT_accessibility: 1141 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 1142 break; 1143 case DW_AT_declaration: 1144 break; // is_forward_declaration = form_value.Boolean(); break; 1145 case DW_AT_inline: 1146 is_inline = form_value.Boolean(); 1147 break; 1148 case DW_AT_virtuality: 1149 is_virtual = form_value.Boolean(); 1150 break; 1151 case DW_AT_explicit: 1152 is_explicit = form_value.Boolean(); 1153 break; 1154 case DW_AT_artificial: 1155 is_artificial = form_value.Boolean(); 1156 break; 1157 1158 case DW_AT_external: 1159 if (form_value.Unsigned()) { 1160 if (storage == clang::SC_None) 1161 storage = clang::SC_Extern; 1162 else 1163 storage = clang::SC_PrivateExtern; 1164 } 1165 break; 1166 1167 case DW_AT_specification: 1168 specification_die_form = form_value; 1169 break; 1170 1171 case DW_AT_abstract_origin: 1172 abstract_origin_die_form = form_value; 1173 break; 1174 1175 case DW_AT_object_pointer: 1176 object_pointer_die_offset = form_value.Reference(); 1177 break; 1178 1179 case DW_AT_allocated: 1180 case DW_AT_associated: 1181 case DW_AT_address_class: 1182 case DW_AT_calling_convention: 1183 case DW_AT_data_location: 1184 case DW_AT_elemental: 1185 case DW_AT_entry_pc: 1186 case DW_AT_frame_base: 1187 case DW_AT_high_pc: 1188 case DW_AT_low_pc: 1189 case DW_AT_prototyped: 1190 case DW_AT_pure: 1191 case DW_AT_ranges: 1192 case DW_AT_recursive: 1193 case DW_AT_return_addr: 1194 case DW_AT_segment: 1195 case DW_AT_start_scope: 1196 case DW_AT_static_link: 1197 case DW_AT_trampoline: 1198 case DW_AT_visibility: 1199 case DW_AT_vtable_elem_location: 1200 case DW_AT_description: 1201 case DW_AT_sibling: 1202 break; 1203 } 1204 } 1205 } 1206 } 1207 1208 std::string object_pointer_name; 1209 if (object_pointer_die_offset != DW_INVALID_OFFSET) { 1210 DWARFDIE object_pointer_die = die.GetDIE(object_pointer_die_offset); 1211 if (object_pointer_die) { 1212 const char *object_pointer_name_cstr = object_pointer_die.GetName(); 1213 if (object_pointer_name_cstr) 1214 object_pointer_name = object_pointer_name_cstr; 1215 } 1216 } 1217 1218 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1219 DW_TAG_value_to_name(tag), type_name_cstr); 1220 1221 CompilerType return_clang_type; 1222 Type *func_type = NULL; 1223 1224 if (type_die_form.IsValid()) 1225 func_type = dwarf->ResolveTypeUID(DIERef(type_die_form)); 1226 1227 if (func_type) 1228 return_clang_type = func_type->GetForwardCompilerType(); 1229 else 1230 return_clang_type = m_ast.GetBasicType(eBasicTypeVoid); 1231 1232 std::vector<CompilerType> function_param_types; 1233 std::vector<clang::ParmVarDecl *> function_param_decls; 1234 1235 // Parse the function children for the parameters 1236 1237 DWARFDIE decl_ctx_die; 1238 clang::DeclContext *containing_decl_ctx = 1239 GetClangDeclContextContainingDIE(die, &decl_ctx_die); 1240 const clang::Decl::Kind containing_decl_kind = 1241 containing_decl_ctx->getDeclKind(); 1242 1243 bool is_cxx_method = DeclKindIsCXXClass(containing_decl_kind); 1244 // Start off static. This will be set to false in 1245 // ParseChildParameters(...) 1246 // if we find a "this" parameters as the first parameter 1247 if (is_cxx_method) { 1248 is_static = true; 1249 } 1250 1251 if (die.HasChildren()) { 1252 bool skip_artificial = true; 1253 ParseChildParameters(sc, containing_decl_ctx, die, skip_artificial, 1254 is_static, is_variadic, has_template_params, 1255 function_param_types, function_param_decls, 1256 type_quals); 1257 } 1258 1259 bool ignore_containing_context = false; 1260 // Check for templatized class member functions. If we had any 1261 // DW_TAG_template_type_parameter 1262 // or DW_TAG_template_value_parameter the DW_TAG_subprogram DIE, then we 1263 // can't let this become 1264 // a method in a class. Why? Because templatized functions are only 1265 // emitted if one of the 1266 // templatized methods is used in the current compile unit and we will 1267 // end up with classes 1268 // that may or may not include these member functions and this means one 1269 // class won't match another 1270 // class definition and it affects our ability to use a class in the 1271 // clang expression parser. So 1272 // for the greater good, we currently must not allow any template member 1273 // functions in a class definition. 1274 if (is_cxx_method && has_template_params) { 1275 ignore_containing_context = true; 1276 is_cxx_method = false; 1277 } 1278 1279 // clang_type will get the function prototype clang type after this call 1280 clang_type = m_ast.CreateFunctionType( 1281 return_clang_type, function_param_types.data(), 1282 function_param_types.size(), is_variadic, type_quals); 1283 1284 if (type_name_cstr) { 1285 bool type_handled = false; 1286 if (tag == DW_TAG_subprogram || tag == DW_TAG_inlined_subroutine) { 1287 ObjCLanguage::MethodName objc_method(type_name_cstr, true); 1288 if (objc_method.IsValid(true)) { 1289 CompilerType class_opaque_type; 1290 ConstString class_name(objc_method.GetClassName()); 1291 if (class_name) { 1292 TypeSP complete_objc_class_type_sp( 1293 dwarf->FindCompleteObjCDefinitionTypeForDIE( 1294 DWARFDIE(), class_name, false)); 1295 1296 if (complete_objc_class_type_sp) { 1297 CompilerType type_clang_forward_type = 1298 complete_objc_class_type_sp->GetForwardCompilerType(); 1299 if (ClangASTContext::IsObjCObjectOrInterfaceType( 1300 type_clang_forward_type)) 1301 class_opaque_type = type_clang_forward_type; 1302 } 1303 } 1304 1305 if (class_opaque_type) { 1306 // If accessibility isn't set to anything valid, assume public 1307 // for 1308 // now... 1309 if (accessibility == eAccessNone) 1310 accessibility = eAccessPublic; 1311 1312 clang::ObjCMethodDecl *objc_method_decl = 1313 m_ast.AddMethodToObjCObjectType( 1314 class_opaque_type, type_name_cstr, clang_type, 1315 accessibility, is_artificial, is_variadic); 1316 type_handled = objc_method_decl != NULL; 1317 if (type_handled) { 1318 LinkDeclContextToDIE( 1319 ClangASTContext::GetAsDeclContext(objc_method_decl), die); 1320 m_ast.SetMetadataAsUserID(objc_method_decl, die.GetID()); 1321 } else { 1322 dwarf->GetObjectFile()->GetModule()->ReportError( 1323 "{0x%8.8x}: invalid Objective-C method 0x%4.4x (%s), " 1324 "please file a bug and attach the file at the start of " 1325 "this error message", 1326 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 1327 } 1328 } 1329 } else if (is_cxx_method) { 1330 // Look at the parent of this DIE and see if is is 1331 // a class or struct and see if this is actually a 1332 // C++ method 1333 Type *class_type = dwarf->ResolveType(decl_ctx_die); 1334 if (class_type) { 1335 bool alternate_defn = false; 1336 if (class_type->GetID() != decl_ctx_die.GetID() || 1337 decl_ctx_die.GetContainingDWOModuleDIE()) { 1338 alternate_defn = true; 1339 1340 // We uniqued the parent class of this function to another 1341 // class 1342 // so we now need to associate all dies under "decl_ctx_die" 1343 // to 1344 // DIEs in the DIE for "class_type"... 1345 SymbolFileDWARF *class_symfile = NULL; 1346 DWARFDIE class_type_die; 1347 1348 SymbolFileDWARFDebugMap *debug_map_symfile = 1349 dwarf->GetDebugMapSymfile(); 1350 if (debug_map_symfile) { 1351 class_symfile = debug_map_symfile->GetSymbolFileByOSOIndex( 1352 SymbolFileDWARFDebugMap::GetOSOIndexFromUserID( 1353 class_type->GetID())); 1354 class_type_die = class_symfile->DebugInfo()->GetDIE( 1355 DIERef(class_type->GetID(), dwarf)); 1356 } else { 1357 class_symfile = dwarf; 1358 class_type_die = dwarf->DebugInfo()->GetDIE( 1359 DIERef(class_type->GetID(), dwarf)); 1360 } 1361 if (class_type_die) { 1362 DWARFDIECollection failures; 1363 1364 CopyUniqueClassMethodTypes(decl_ctx_die, class_type_die, 1365 class_type, failures); 1366 1367 // FIXME do something with these failures that's smarter 1368 // than 1369 // just dropping them on the ground. Unfortunately classes 1370 // don't 1371 // like having stuff added to them after their definitions 1372 // are 1373 // complete... 1374 1375 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1376 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1377 type_sp = type_ptr->shared_from_this(); 1378 break; 1379 } 1380 } 1381 } 1382 1383 if (specification_die_form.IsValid()) { 1384 // We have a specification which we are going to base our 1385 // function 1386 // prototype off of, so we need this type to be completed so 1387 // that the 1388 // m_die_to_decl_ctx for the method in the specification has a 1389 // valid 1390 // clang decl context. 1391 class_type->GetForwardCompilerType(); 1392 // If we have a specification, then the function type should 1393 // have been 1394 // made with the specification and not with this die. 1395 DWARFDIE spec_die = dwarf->DebugInfo()->GetDIE( 1396 DIERef(specification_die_form)); 1397 clang::DeclContext *spec_clang_decl_ctx = 1398 GetClangDeclContextForDIE(spec_die); 1399 if (spec_clang_decl_ctx) { 1400 LinkDeclContextToDIE(spec_clang_decl_ctx, die); 1401 } else { 1402 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1403 "0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8" PRIx64 1404 ") has no decl\n", 1405 die.GetID(), specification_die_form.Reference()); 1406 } 1407 type_handled = true; 1408 } else if (abstract_origin_die_form.IsValid()) { 1409 // We have a specification which we are going to base our 1410 // function 1411 // prototype off of, so we need this type to be completed so 1412 // that the 1413 // m_die_to_decl_ctx for the method in the abstract origin has 1414 // a valid 1415 // clang decl context. 1416 class_type->GetForwardCompilerType(); 1417 1418 DWARFDIE abs_die = dwarf->DebugInfo()->GetDIE( 1419 DIERef(abstract_origin_die_form)); 1420 clang::DeclContext *abs_clang_decl_ctx = 1421 GetClangDeclContextForDIE(abs_die); 1422 if (abs_clang_decl_ctx) { 1423 LinkDeclContextToDIE(abs_clang_decl_ctx, die); 1424 } else { 1425 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1426 "0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8" PRIx64 1427 ") has no decl\n", 1428 die.GetID(), abstract_origin_die_form.Reference()); 1429 } 1430 type_handled = true; 1431 } else { 1432 CompilerType class_opaque_type = 1433 class_type->GetForwardCompilerType(); 1434 if (ClangASTContext::IsCXXClassType(class_opaque_type)) { 1435 if (class_opaque_type.IsBeingDefined() || alternate_defn) { 1436 if (!is_static && !die.HasChildren()) { 1437 // We have a C++ member function with no children (this 1438 // pointer!) 1439 // and clang will get mad if we try and make a function 1440 // that isn't 1441 // well formed in the DWARF, so we will just skip it... 1442 type_handled = true; 1443 } else { 1444 bool add_method = true; 1445 if (alternate_defn) { 1446 // If an alternate definition for the class exists, 1447 // then add the method only if an 1448 // equivalent is not already present. 1449 clang::CXXRecordDecl *record_decl = 1450 m_ast.GetAsCXXRecordDecl( 1451 class_opaque_type.GetOpaqueQualType()); 1452 if (record_decl) { 1453 for (auto method_iter = record_decl->method_begin(); 1454 method_iter != record_decl->method_end(); 1455 method_iter++) { 1456 clang::CXXMethodDecl *method_decl = *method_iter; 1457 if (method_decl->getNameInfo().getAsString() == 1458 std::string(type_name_cstr)) { 1459 if (method_decl->getType() == 1460 ClangUtil::GetQualType(clang_type)) { 1461 add_method = false; 1462 LinkDeclContextToDIE( 1463 ClangASTContext::GetAsDeclContext( 1464 method_decl), 1465 die); 1466 type_handled = true; 1467 1468 break; 1469 } 1470 } 1471 } 1472 } 1473 } 1474 1475 if (add_method) { 1476 llvm::PrettyStackTraceFormat stack_trace( 1477 "SymbolFileDWARF::ParseType() is adding a method " 1478 "%s to class %s in DIE 0x%8.8" PRIx64 " from %s", 1479 type_name_cstr, 1480 class_type->GetName().GetCString(), die.GetID(), 1481 dwarf->GetObjectFile() 1482 ->GetFileSpec() 1483 .GetPath() 1484 .c_str()); 1485 1486 const bool is_attr_used = false; 1487 // Neither GCC 4.2 nor clang++ currently set a valid 1488 // accessibility 1489 // in the DWARF for C++ methods... Default to public 1490 // for now... 1491 if (accessibility == eAccessNone) 1492 accessibility = eAccessPublic; 1493 1494 clang::CXXMethodDecl *cxx_method_decl = 1495 m_ast.AddMethodToCXXRecordType( 1496 class_opaque_type.GetOpaqueQualType(), 1497 type_name_cstr, clang_type, accessibility, 1498 is_virtual, is_static, is_inline, is_explicit, 1499 is_attr_used, is_artificial); 1500 1501 type_handled = cxx_method_decl != NULL; 1502 1503 if (type_handled) { 1504 LinkDeclContextToDIE( 1505 ClangASTContext::GetAsDeclContext( 1506 cxx_method_decl), 1507 die); 1508 1509 ClangASTMetadata metadata; 1510 metadata.SetUserID(die.GetID()); 1511 1512 if (!object_pointer_name.empty()) { 1513 metadata.SetObjectPtrName( 1514 object_pointer_name.c_str()); 1515 if (log) 1516 log->Printf( 1517 "Setting object pointer name: %s on method " 1518 "object %p.\n", 1519 object_pointer_name.c_str(), 1520 static_cast<void *>(cxx_method_decl)); 1521 } 1522 m_ast.SetMetadata(cxx_method_decl, metadata); 1523 } else { 1524 ignore_containing_context = true; 1525 } 1526 } 1527 } 1528 } else { 1529 // We were asked to parse the type for a method in a 1530 // class, yet the 1531 // class hasn't been asked to complete itself through the 1532 // clang::ExternalASTSource protocol, so we need to just 1533 // have the 1534 // class complete itself and do things the right way, then 1535 // our 1536 // DIE should then have an entry in the 1537 // dwarf->GetDIEToType() map. First 1538 // we need to modify the dwarf->GetDIEToType() so it 1539 // doesn't think we are 1540 // trying to parse this DIE anymore... 1541 dwarf->GetDIEToType()[die.GetDIE()] = NULL; 1542 1543 // Now we get the full type to force our class type to 1544 // complete itself 1545 // using the clang::ExternalASTSource protocol which will 1546 // parse all 1547 // base classes and all methods (including the method for 1548 // this DIE). 1549 class_type->GetFullCompilerType(); 1550 1551 // The type for this DIE should have been filled in the 1552 // function call above 1553 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1554 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1555 type_sp = type_ptr->shared_from_this(); 1556 break; 1557 } 1558 1559 // FIXME This is fixing some even uglier behavior but we 1560 // really need to 1561 // uniq the methods of each class as well as the class 1562 // itself. 1563 // <rdar://problem/11240464> 1564 type_handled = true; 1565 } 1566 } 1567 } 1568 } 1569 } 1570 } 1571 1572 if (!type_handled) { 1573 clang::FunctionDecl *function_decl = nullptr; 1574 1575 if (abstract_origin_die_form.IsValid()) { 1576 DWARFDIE abs_die = 1577 dwarf->DebugInfo()->GetDIE(DIERef(abstract_origin_die_form)); 1578 1579 SymbolContext sc; 1580 1581 if (dwarf->ResolveType(abs_die)) { 1582 function_decl = llvm::dyn_cast_or_null<clang::FunctionDecl>( 1583 GetCachedClangDeclContextForDIE(abs_die)); 1584 1585 if (function_decl) { 1586 LinkDeclContextToDIE(function_decl, die); 1587 } 1588 } 1589 } 1590 1591 if (!function_decl) { 1592 // We just have a function that isn't part of a class 1593 function_decl = m_ast.CreateFunctionDeclaration( 1594 ignore_containing_context ? m_ast.GetTranslationUnitDecl() 1595 : containing_decl_ctx, 1596 type_name_cstr, clang_type, storage, is_inline); 1597 1598 // if (template_param_infos.GetSize() > 1599 // 0) 1600 // { 1601 // clang::FunctionTemplateDecl 1602 // *func_template_decl = 1603 // CreateFunctionTemplateDecl 1604 // (containing_decl_ctx, 1605 // function_decl, 1606 // type_name_cstr, 1607 // template_param_infos); 1608 // 1609 // CreateFunctionTemplateSpecializationInfo 1610 // (function_decl, 1611 // func_template_decl, 1612 // template_param_infos); 1613 // } 1614 // Add the decl to our DIE to decl context map 1615 1616 lldbassert(function_decl); 1617 1618 if (function_decl) { 1619 LinkDeclContextToDIE(function_decl, die); 1620 1621 if (!function_param_decls.empty()) 1622 m_ast.SetFunctionParameters(function_decl, 1623 &function_param_decls.front(), 1624 function_param_decls.size()); 1625 1626 ClangASTMetadata metadata; 1627 metadata.SetUserID(die.GetID()); 1628 1629 if (!object_pointer_name.empty()) { 1630 metadata.SetObjectPtrName(object_pointer_name.c_str()); 1631 if (log) 1632 log->Printf("Setting object pointer name: %s on function " 1633 "object %p.", 1634 object_pointer_name.c_str(), 1635 static_cast<void *>(function_decl)); 1636 } 1637 m_ast.SetMetadata(function_decl, metadata); 1638 } 1639 } 1640 } 1641 } 1642 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, 0, NULL, 1643 LLDB_INVALID_UID, Type::eEncodingIsUID, &decl, 1644 clang_type, Type::eResolveStateFull)); 1645 assert(type_sp.get()); 1646 } break; 1647 1648 case DW_TAG_array_type: { 1649 // Set a bit that lets us know that we are currently parsing this 1650 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1651 1652 DWARFFormValue type_die_form; 1653 int64_t first_index = 0; 1654 uint32_t byte_stride = 0; 1655 uint32_t bit_stride = 0; 1656 bool is_vector = false; 1657 const size_t num_attributes = die.GetAttributes(attributes); 1658 1659 if (num_attributes > 0) { 1660 uint32_t i; 1661 for (i = 0; i < num_attributes; ++i) { 1662 attr = attributes.AttributeAtIndex(i); 1663 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1664 switch (attr) { 1665 case DW_AT_decl_file: 1666 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 1667 form_value.Unsigned())); 1668 break; 1669 case DW_AT_decl_line: 1670 decl.SetLine(form_value.Unsigned()); 1671 break; 1672 case DW_AT_decl_column: 1673 decl.SetColumn(form_value.Unsigned()); 1674 break; 1675 case DW_AT_name: 1676 type_name_cstr = form_value.AsCString(); 1677 type_name_const_str.SetCString(type_name_cstr); 1678 break; 1679 1680 case DW_AT_type: 1681 type_die_form = form_value; 1682 break; 1683 case DW_AT_byte_size: 1684 break; // byte_size = form_value.Unsigned(); break; 1685 case DW_AT_byte_stride: 1686 byte_stride = form_value.Unsigned(); 1687 break; 1688 case DW_AT_bit_stride: 1689 bit_stride = form_value.Unsigned(); 1690 break; 1691 case DW_AT_GNU_vector: 1692 is_vector = form_value.Boolean(); 1693 break; 1694 case DW_AT_accessibility: 1695 break; // accessibility = 1696 // DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 1697 case DW_AT_declaration: 1698 break; // is_forward_declaration = form_value.Boolean(); break; 1699 case DW_AT_allocated: 1700 case DW_AT_associated: 1701 case DW_AT_data_location: 1702 case DW_AT_description: 1703 case DW_AT_ordering: 1704 case DW_AT_start_scope: 1705 case DW_AT_visibility: 1706 case DW_AT_specification: 1707 case DW_AT_abstract_origin: 1708 case DW_AT_sibling: 1709 break; 1710 } 1711 } 1712 } 1713 1714 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1715 DW_TAG_value_to_name(tag), type_name_cstr); 1716 1717 DIERef type_die_ref(type_die_form); 1718 Type *element_type = dwarf->ResolveTypeUID(type_die_ref); 1719 1720 if (element_type) { 1721 std::vector<uint64_t> element_orders; 1722 ParseChildArrayInfo(sc, die, first_index, element_orders, 1723 byte_stride, bit_stride); 1724 if (byte_stride == 0 && bit_stride == 0) 1725 byte_stride = element_type->GetByteSize(); 1726 CompilerType array_element_type = 1727 element_type->GetForwardCompilerType(); 1728 1729 if (ClangASTContext::IsCXXClassType(array_element_type) && 1730 array_element_type.GetCompleteType() == false) { 1731 ModuleSP module_sp = die.GetModule(); 1732 if (module_sp) { 1733 if (die.GetCU()->GetProducer() == 1734 DWARFCompileUnit::eProducerClang) 1735 module_sp->ReportError( 1736 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a " 1737 "class/union/struct element type DIE 0x%8.8x that is a " 1738 "forward declaration, not a complete definition.\nTry " 1739 "compiling the source file with -fno-limit-debug-info or " 1740 "disable -gmodule", 1741 die.GetOffset(), type_die_ref.die_offset); 1742 else 1743 module_sp->ReportError( 1744 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a " 1745 "class/union/struct element type DIE 0x%8.8x that is a " 1746 "forward declaration, not a complete definition.\nPlease " 1747 "file a bug against the compiler and include the " 1748 "preprocessed output for %s", 1749 die.GetOffset(), type_die_ref.die_offset, 1750 die.GetLLDBCompileUnit() 1751 ? die.GetLLDBCompileUnit()->GetPath().c_str() 1752 : "the source file"); 1753 } 1754 1755 // We have no choice other than to pretend that the element class 1756 // type 1757 // is complete. If we don't do this, clang will crash when trying 1758 // to layout the class. Since we provide layout assistance, all 1759 // ivars in this class and other classes will be fine, this is 1760 // the best we can do short of crashing. 1761 if (ClangASTContext::StartTagDeclarationDefinition( 1762 array_element_type)) { 1763 ClangASTContext::CompleteTagDeclarationDefinition( 1764 array_element_type); 1765 } else { 1766 module_sp->ReportError("DWARF DIE at 0x%8.8x was not able to " 1767 "start its definition.\nPlease file a " 1768 "bug and attach the file at the start " 1769 "of this error message", 1770 type_die_ref.die_offset); 1771 } 1772 } 1773 1774 uint64_t array_element_bit_stride = byte_stride * 8 + bit_stride; 1775 if (element_orders.size() > 0) { 1776 uint64_t num_elements = 0; 1777 std::vector<uint64_t>::const_reverse_iterator pos; 1778 std::vector<uint64_t>::const_reverse_iterator end = 1779 element_orders.rend(); 1780 for (pos = element_orders.rbegin(); pos != end; ++pos) { 1781 num_elements = *pos; 1782 clang_type = m_ast.CreateArrayType(array_element_type, 1783 num_elements, is_vector); 1784 array_element_type = clang_type; 1785 array_element_bit_stride = 1786 num_elements ? array_element_bit_stride * num_elements 1787 : array_element_bit_stride; 1788 } 1789 } else { 1790 clang_type = 1791 m_ast.CreateArrayType(array_element_type, 0, is_vector); 1792 } 1793 ConstString empty_name; 1794 type_sp.reset(new Type( 1795 die.GetID(), dwarf, empty_name, array_element_bit_stride / 8, 1796 NULL, DIERef(type_die_form).GetUID(dwarf), Type::eEncodingIsUID, 1797 &decl, clang_type, Type::eResolveStateFull)); 1798 type_sp->SetEncodingType(element_type); 1799 } 1800 } 1801 } break; 1802 1803 case DW_TAG_ptr_to_member_type: { 1804 DWARFFormValue type_die_form; 1805 DWARFFormValue containing_type_die_form; 1806 1807 const size_t num_attributes = die.GetAttributes(attributes); 1808 1809 if (num_attributes > 0) { 1810 uint32_t i; 1811 for (i = 0; i < num_attributes; ++i) { 1812 attr = attributes.AttributeAtIndex(i); 1813 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1814 switch (attr) { 1815 case DW_AT_type: 1816 type_die_form = form_value; 1817 break; 1818 case DW_AT_containing_type: 1819 containing_type_die_form = form_value; 1820 break; 1821 } 1822 } 1823 } 1824 1825 Type *pointee_type = dwarf->ResolveTypeUID(DIERef(type_die_form)); 1826 Type *class_type = 1827 dwarf->ResolveTypeUID(DIERef(containing_type_die_form)); 1828 1829 CompilerType pointee_clang_type = 1830 pointee_type->GetForwardCompilerType(); 1831 CompilerType class_clang_type = class_type->GetLayoutCompilerType(); 1832 1833 clang_type = ClangASTContext::CreateMemberPointerType( 1834 class_clang_type, pointee_clang_type); 1835 1836 byte_size = clang_type.GetByteSize(nullptr); 1837 1838 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, 1839 byte_size, NULL, LLDB_INVALID_UID, 1840 Type::eEncodingIsUID, NULL, clang_type, 1841 Type::eResolveStateForward)); 1842 } 1843 1844 break; 1845 } 1846 default: 1847 dwarf->GetObjectFile()->GetModule()->ReportError( 1848 "{0x%8.8x}: unhandled type tag 0x%4.4x (%s), please file a bug and " 1849 "attach the file at the start of this error message", 1850 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 1851 break; 1852 } 1853 1854 if (type_sp.get()) { 1855 DWARFDIE sc_parent_die = 1856 SymbolFileDWARF::GetParentSymbolContextDIE(die); 1857 dw_tag_t sc_parent_tag = sc_parent_die.Tag(); 1858 1859 SymbolContextScope *symbol_context_scope = NULL; 1860 if (sc_parent_tag == DW_TAG_compile_unit) { 1861 symbol_context_scope = sc.comp_unit; 1862 } else if (sc.function != NULL && sc_parent_die) { 1863 symbol_context_scope = 1864 sc.function->GetBlock(true).FindBlockByID(sc_parent_die.GetID()); 1865 if (symbol_context_scope == NULL) 1866 symbol_context_scope = sc.function; 1867 } 1868 1869 if (symbol_context_scope != NULL) { 1870 type_sp->SetSymbolContextScope(symbol_context_scope); 1871 } 1872 1873 // We are ready to put this type into the uniqued list up at the module 1874 // level 1875 type_list->Insert(type_sp); 1876 1877 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1878 } 1879 } else if (type_ptr != DIE_IS_BEING_PARSED) { 1880 type_sp = type_ptr->shared_from_this(); 1881 } 1882 } 1883 return type_sp; 1884} 1885 1886// DWARF parsing functions 1887 1888class DWARFASTParserClang::DelayedAddObjCClassProperty { 1889public: 1890 DelayedAddObjCClassProperty( 1891 const CompilerType &class_opaque_type, const char *property_name, 1892 const CompilerType &property_opaque_type, // The property type is only 1893 // required if you don't have an 1894 // ivar decl 1895 clang::ObjCIvarDecl *ivar_decl, const char *property_setter_name, 1896 const char *property_getter_name, uint32_t property_attributes, 1897 const ClangASTMetadata *metadata) 1898 : m_class_opaque_type(class_opaque_type), m_property_name(property_name), 1899 m_property_opaque_type(property_opaque_type), m_ivar_decl(ivar_decl), 1900 m_property_setter_name(property_setter_name), 1901 m_property_getter_name(property_getter_name), 1902 m_property_attributes(property_attributes) { 1903 if (metadata != NULL) { 1904 m_metadata_ap.reset(new ClangASTMetadata()); 1905 *m_metadata_ap = *metadata; 1906 } 1907 } 1908 1909 DelayedAddObjCClassProperty(const DelayedAddObjCClassProperty &rhs) { 1910 *this = rhs; 1911 } 1912 1913 DelayedAddObjCClassProperty & 1914 operator=(const DelayedAddObjCClassProperty &rhs) { 1915 m_class_opaque_type = rhs.m_class_opaque_type; 1916 m_property_name = rhs.m_property_name; 1917 m_property_opaque_type = rhs.m_property_opaque_type; 1918 m_ivar_decl = rhs.m_ivar_decl; 1919 m_property_setter_name = rhs.m_property_setter_name; 1920 m_property_getter_name = rhs.m_property_getter_name; 1921 m_property_attributes = rhs.m_property_attributes; 1922 1923 if (rhs.m_metadata_ap.get()) { 1924 m_metadata_ap.reset(new ClangASTMetadata()); 1925 *m_metadata_ap = *rhs.m_metadata_ap; 1926 } 1927 return *this; 1928 } 1929 1930 bool Finalize() { 1931 return ClangASTContext::AddObjCClassProperty( 1932 m_class_opaque_type, m_property_name, m_property_opaque_type, 1933 m_ivar_decl, m_property_setter_name, m_property_getter_name, 1934 m_property_attributes, m_metadata_ap.get()); 1935 } 1936 1937private: 1938 CompilerType m_class_opaque_type; 1939 const char *m_property_name; 1940 CompilerType m_property_opaque_type; 1941 clang::ObjCIvarDecl *m_ivar_decl; 1942 const char *m_property_setter_name; 1943 const char *m_property_getter_name; 1944 uint32_t m_property_attributes; 1945 std::unique_ptr<ClangASTMetadata> m_metadata_ap; 1946}; 1947 1948bool DWARFASTParserClang::ParseTemplateDIE( 1949 const DWARFDIE &die, 1950 ClangASTContext::TemplateParameterInfos &template_param_infos) { 1951 const dw_tag_t tag = die.Tag(); 1952 1953 switch (tag) { 1954 case DW_TAG_template_type_parameter: 1955 case DW_TAG_template_value_parameter: { 1956 DWARFAttributes attributes; 1957 const size_t num_attributes = die.GetAttributes(attributes); 1958 const char *name = nullptr; 1959 CompilerType clang_type; 1960 uint64_t uval64 = 0; 1961 bool uval64_valid = false; 1962 if (num_attributes > 0) { 1963 DWARFFormValue form_value; 1964 for (size_t i = 0; i < num_attributes; ++i) { 1965 const dw_attr_t attr = attributes.AttributeAtIndex(i); 1966 1967 switch (attr) { 1968 case DW_AT_name: 1969 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1970 name = form_value.AsCString(); 1971 break; 1972 1973 case DW_AT_type: 1974 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1975 Type *lldb_type = die.ResolveTypeUID(DIERef(form_value)); 1976 if (lldb_type) 1977 clang_type = lldb_type->GetForwardCompilerType(); 1978 } 1979 break; 1980 1981 case DW_AT_const_value: 1982 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1983 uval64_valid = true; 1984 uval64 = form_value.Unsigned(); 1985 } 1986 break; 1987 default: 1988 break; 1989 } 1990 } 1991 1992 clang::ASTContext *ast = m_ast.getASTContext(); 1993 if (!clang_type) 1994 clang_type = m_ast.GetBasicType(eBasicTypeVoid); 1995 1996 if (clang_type) { 1997 bool is_signed = false; 1998 if (name && name[0]) 1999 template_param_infos.names.push_back(name); 2000 else 2001 template_param_infos.names.push_back(NULL); 2002 2003 // Get the signed value for any integer or enumeration if available 2004 clang_type.IsIntegerOrEnumerationType(is_signed); 2005 2006 if (tag == DW_TAG_template_value_parameter && uval64_valid) { 2007 llvm::APInt apint(clang_type.GetBitSize(nullptr), uval64, is_signed); 2008 template_param_infos.args.push_back( 2009 clang::TemplateArgument(*ast, llvm::APSInt(apint, !is_signed), 2010 ClangUtil::GetQualType(clang_type))); 2011 } else { 2012 template_param_infos.args.push_back( 2013 clang::TemplateArgument(ClangUtil::GetQualType(clang_type))); 2014 } 2015 } else { 2016 return false; 2017 } 2018 } 2019 } 2020 return true; 2021 2022 default: 2023 break; 2024 } 2025 return false; 2026} 2027 2028bool DWARFASTParserClang::ParseTemplateParameterInfos( 2029 const DWARFDIE &parent_die, 2030 ClangASTContext::TemplateParameterInfos &template_param_infos) { 2031 2032 if (!parent_die) 2033 return false; 2034 2035 Args template_parameter_names; 2036 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2037 die = die.GetSibling()) { 2038 const dw_tag_t tag = die.Tag(); 2039 2040 switch (tag) { 2041 case DW_TAG_template_type_parameter: 2042 case DW_TAG_template_value_parameter: 2043 ParseTemplateDIE(die, template_param_infos); 2044 break; 2045 2046 default: 2047 break; 2048 } 2049 } 2050 if (template_param_infos.args.empty()) 2051 return false; 2052 return template_param_infos.args.size() == template_param_infos.names.size(); 2053} 2054 2055bool DWARFASTParserClang::CompleteTypeFromDWARF(const DWARFDIE &die, 2056 lldb_private::Type *type, 2057 CompilerType &clang_type) { 2058 SymbolFileDWARF *dwarf = die.GetDWARF(); 2059 2060 std::lock_guard<std::recursive_mutex> guard( 2061 dwarf->GetObjectFile()->GetModule()->GetMutex()); 2062 2063 // Disable external storage for this type so we don't get anymore 2064 // clang::ExternalASTSource queries for this type. 2065 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), false); 2066 2067 if (!die) 2068 return false; 2069 2070#if defined LLDB_CONFIGURATION_DEBUG 2071 //---------------------------------------------------------------------- 2072 // For debugging purposes, the LLDB_DWARF_DONT_COMPLETE_TYPENAMES 2073 // environment variable can be set with one or more typenames separated 2074 // by ';' characters. This will cause this function to not complete any 2075 // types whose names match. 2076 // 2077 // Examples of setting this environment variable: 2078 // 2079 // LLDB_DWARF_DONT_COMPLETE_TYPENAMES=Foo 2080 // LLDB_DWARF_DONT_COMPLETE_TYPENAMES=Foo;Bar;Baz 2081 //---------------------------------------------------------------------- 2082 const char *dont_complete_typenames_cstr = 2083 getenv("LLDB_DWARF_DONT_COMPLETE_TYPENAMES"); 2084 if (dont_complete_typenames_cstr && dont_complete_typenames_cstr[0]) { 2085 const char *die_name = die.GetName(); 2086 if (die_name && die_name[0]) { 2087 const char *match = strstr(dont_complete_typenames_cstr, die_name); 2088 if (match) { 2089 size_t die_name_length = strlen(die_name); 2090 while (match) { 2091 const char separator_char = ';'; 2092 const char next_char = match[die_name_length]; 2093 if (next_char == '\0' || next_char == separator_char) { 2094 if (match == dont_complete_typenames_cstr || 2095 match[-1] == separator_char) 2096 return false; 2097 } 2098 match = strstr(match + 1, die_name); 2099 } 2100 } 2101 } 2102 } 2103#endif 2104 2105 const dw_tag_t tag = die.Tag(); 2106 2107 Log *log = 2108 nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION)); 2109 if (log) 2110 dwarf->GetObjectFile()->GetModule()->LogMessageVerboseBacktrace( 2111 log, "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...", 2112 die.GetID(), die.GetTagAsCString(), type->GetName().AsCString()); 2113 assert(clang_type); 2114 DWARFAttributes attributes; 2115 switch (tag) { 2116 case DW_TAG_structure_type: 2117 case DW_TAG_union_type: 2118 case DW_TAG_class_type: { 2119 ClangASTImporter::LayoutInfo layout_info; 2120 2121 { 2122 if (die.HasChildren()) { 2123 LanguageType class_language = eLanguageTypeUnknown; 2124 if (ClangASTContext::IsObjCObjectOrInterfaceType(clang_type)) { 2125 class_language = eLanguageTypeObjC; 2126 // For objective C we don't start the definition when 2127 // the class is created. 2128 ClangASTContext::StartTagDeclarationDefinition(clang_type); 2129 } 2130 2131 int tag_decl_kind = -1; 2132 AccessType default_accessibility = eAccessNone; 2133 if (tag == DW_TAG_structure_type) { 2134 tag_decl_kind = clang::TTK_Struct; 2135 default_accessibility = eAccessPublic; 2136 } else if (tag == DW_TAG_union_type) { 2137 tag_decl_kind = clang::TTK_Union; 2138 default_accessibility = eAccessPublic; 2139 } else if (tag == DW_TAG_class_type) { 2140 tag_decl_kind = clang::TTK_Class; 2141 default_accessibility = eAccessPrivate; 2142 } 2143 2144 SymbolContext sc(die.GetLLDBCompileUnit()); 2145 std::vector<clang::CXXBaseSpecifier *> base_classes; 2146 std::vector<int> member_accessibilities; 2147 bool is_a_class = false; 2148 // Parse members and base classes first 2149 DWARFDIECollection member_function_dies; 2150 2151 DelayedPropertyList delayed_properties; 2152 ParseChildMembers(sc, die, clang_type, class_language, base_classes, 2153 member_accessibilities, member_function_dies, 2154 delayed_properties, default_accessibility, is_a_class, 2155 layout_info); 2156 2157 // Now parse any methods if there were any... 2158 size_t num_functions = member_function_dies.Size(); 2159 if (num_functions > 0) { 2160 for (size_t i = 0; i < num_functions; ++i) { 2161 dwarf->ResolveType(member_function_dies.GetDIEAtIndex(i)); 2162 } 2163 } 2164 2165 if (class_language == eLanguageTypeObjC) { 2166 ConstString class_name(clang_type.GetTypeName()); 2167 if (class_name) { 2168 DIEArray method_die_offsets; 2169 dwarf->GetObjCMethodDIEOffsets(class_name, method_die_offsets); 2170 2171 if (!method_die_offsets.empty()) { 2172 DWARFDebugInfo *debug_info = dwarf->DebugInfo(); 2173 2174 const size_t num_matches = method_die_offsets.size(); 2175 for (size_t i = 0; i < num_matches; ++i) { 2176 const DIERef &die_ref = method_die_offsets[i]; 2177 DWARFDIE method_die = debug_info->GetDIE(die_ref); 2178 2179 if (method_die) 2180 method_die.ResolveType(); 2181 } 2182 } 2183 2184 for (DelayedPropertyList::iterator pi = delayed_properties.begin(), 2185 pe = delayed_properties.end(); 2186 pi != pe; ++pi) 2187 pi->Finalize(); 2188 } 2189 } 2190 2191 // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we 2192 // need to tell the clang type it is actually a class. 2193 if (class_language != eLanguageTypeObjC) { 2194 if (is_a_class && tag_decl_kind != clang::TTK_Class) 2195 m_ast.SetTagTypeKind(ClangUtil::GetQualType(clang_type), 2196 clang::TTK_Class); 2197 } 2198 2199 // Since DW_TAG_structure_type gets used for both classes 2200 // and structures, we may need to set any DW_TAG_member 2201 // fields to have a "private" access if none was specified. 2202 // When we parsed the child members we tracked that actual 2203 // accessibility value for each DW_TAG_member in the 2204 // "member_accessibilities" array. If the value for the 2205 // member is zero, then it was set to the "default_accessibility" 2206 // which for structs was "public". Below we correct this 2207 // by setting any fields to "private" that weren't correctly 2208 // set. 2209 if (is_a_class && !member_accessibilities.empty()) { 2210 // This is a class and all members that didn't have 2211 // their access specified are private. 2212 m_ast.SetDefaultAccessForRecordFields( 2213 m_ast.GetAsRecordDecl(clang_type), eAccessPrivate, 2214 &member_accessibilities.front(), member_accessibilities.size()); 2215 } 2216 2217 if (!base_classes.empty()) { 2218 // Make sure all base classes refer to complete types and not 2219 // forward declarations. If we don't do this, clang will crash 2220 // with an assertion in the call to 2221 // clang_type.SetBaseClassesForClassType() 2222 for (auto &base_class : base_classes) { 2223 clang::TypeSourceInfo *type_source_info = 2224 base_class->getTypeSourceInfo(); 2225 if (type_source_info) { 2226 CompilerType base_class_type( 2227 &m_ast, type_source_info->getType().getAsOpaquePtr()); 2228 if (base_class_type.GetCompleteType() == false) { 2229 auto module = dwarf->GetObjectFile()->GetModule(); 2230 module->ReportError(":: Class '%s' has a base class '%s' which " 2231 "does not have a complete definition.", 2232 die.GetName(), 2233 base_class_type.GetTypeName().GetCString()); 2234 if (die.GetCU()->GetProducer() == 2235 DWARFCompileUnit::eProducerClang) 2236 module->ReportError(":: Try compiling the source file with " 2237 "-fno-limit-debug-info."); 2238 2239 // We have no choice other than to pretend that the base class 2240 // is complete. If we don't do this, clang will crash when we 2241 // call setBases() inside of 2242 // "clang_type.SetBaseClassesForClassType()" 2243 // below. Since we provide layout assistance, all ivars in this 2244 // class and other classes will be fine, this is the best we can 2245 // do 2246 // short of crashing. 2247 if (ClangASTContext::StartTagDeclarationDefinition( 2248 base_class_type)) { 2249 ClangASTContext::CompleteTagDeclarationDefinition( 2250 base_class_type); 2251 } 2252 } 2253 } 2254 } 2255 m_ast.SetBaseClassesForClassType(clang_type.GetOpaqueQualType(), 2256 &base_classes.front(), 2257 base_classes.size()); 2258 2259 // Clang will copy each CXXBaseSpecifier in "base_classes" 2260 // so we have to free them all. 2261 ClangASTContext::DeleteBaseClassSpecifiers(&base_classes.front(), 2262 base_classes.size()); 2263 } 2264 } 2265 } 2266 2267 ClangASTContext::BuildIndirectFields(clang_type); 2268 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 2269 2270 if (!layout_info.field_offsets.empty() || 2271 !layout_info.base_offsets.empty() || 2272 !layout_info.vbase_offsets.empty()) { 2273 if (type) 2274 layout_info.bit_size = type->GetByteSize() * 8; 2275 if (layout_info.bit_size == 0) 2276 layout_info.bit_size = 2277 die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 0) * 8; 2278 2279 clang::CXXRecordDecl *record_decl = 2280 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 2281 if (record_decl) { 2282 if (log) { 2283 ModuleSP module_sp = dwarf->GetObjectFile()->GetModule(); 2284 2285 if (module_sp) { 2286 module_sp->LogMessage( 2287 log, 2288 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) " 2289 "caching layout info for record_decl = %p, bit_size = %" PRIu64 2290 ", alignment = %" PRIu64 2291 ", field_offsets[%u], base_offsets[%u], vbase_offsets[%u])", 2292 static_cast<void *>(clang_type.GetOpaqueQualType()), 2293 static_cast<void *>(record_decl), layout_info.bit_size, 2294 layout_info.alignment, 2295 static_cast<uint32_t>(layout_info.field_offsets.size()), 2296 static_cast<uint32_t>(layout_info.base_offsets.size()), 2297 static_cast<uint32_t>(layout_info.vbase_offsets.size())); 2298 2299 uint32_t idx; 2300 { 2301 llvm::DenseMap<const clang::FieldDecl *, uint64_t>::const_iterator 2302 pos, 2303 end = layout_info.field_offsets.end(); 2304 for (idx = 0, pos = layout_info.field_offsets.begin(); pos != end; 2305 ++pos, ++idx) { 2306 module_sp->LogMessage( 2307 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2308 "%p) field[%u] = { bit_offset=%u, name='%s' }", 2309 static_cast<void *>(clang_type.GetOpaqueQualType()), idx, 2310 static_cast<uint32_t>(pos->second), 2311 pos->first->getNameAsString().c_str()); 2312 } 2313 } 2314 2315 { 2316 llvm::DenseMap<const clang::CXXRecordDecl *, 2317 clang::CharUnits>::const_iterator base_pos, 2318 base_end = layout_info.base_offsets.end(); 2319 for (idx = 0, base_pos = layout_info.base_offsets.begin(); 2320 base_pos != base_end; ++base_pos, ++idx) { 2321 module_sp->LogMessage( 2322 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2323 "%p) base[%u] = { byte_offset=%u, name='%s' }", 2324 clang_type.GetOpaqueQualType(), idx, 2325 (uint32_t)base_pos->second.getQuantity(), 2326 base_pos->first->getNameAsString().c_str()); 2327 } 2328 } 2329 { 2330 llvm::DenseMap<const clang::CXXRecordDecl *, 2331 clang::CharUnits>::const_iterator vbase_pos, 2332 vbase_end = layout_info.vbase_offsets.end(); 2333 for (idx = 0, vbase_pos = layout_info.vbase_offsets.begin(); 2334 vbase_pos != vbase_end; ++vbase_pos, ++idx) { 2335 module_sp->LogMessage( 2336 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2337 "%p) vbase[%u] = { byte_offset=%u, name='%s' }", 2338 static_cast<void *>(clang_type.GetOpaqueQualType()), idx, 2339 static_cast<uint32_t>(vbase_pos->second.getQuantity()), 2340 vbase_pos->first->getNameAsString().c_str()); 2341 } 2342 } 2343 } 2344 } 2345 GetClangASTImporter().InsertRecordDecl(record_decl, layout_info); 2346 } 2347 } 2348 } 2349 2350 return (bool)clang_type; 2351 2352 case DW_TAG_enumeration_type: 2353 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 2354 if (die.HasChildren()) { 2355 SymbolContext sc(die.GetLLDBCompileUnit()); 2356 bool is_signed = false; 2357 clang_type.IsIntegerType(is_signed); 2358 ParseChildEnumerators(sc, clang_type, is_signed, type->GetByteSize(), 2359 die); 2360 } 2361 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 2362 } 2363 return (bool)clang_type; 2364 2365 default: 2366 assert(false && "not a forward clang type decl!"); 2367 break; 2368 } 2369 2370 return false; 2371} 2372 2373std::vector<DWARFDIE> DWARFASTParserClang::GetDIEForDeclContext( 2374 lldb_private::CompilerDeclContext decl_context) { 2375 std::vector<DWARFDIE> result; 2376 for (auto it = m_decl_ctx_to_die.find( 2377 (clang::DeclContext *)decl_context.GetOpaqueDeclContext()); 2378 it != m_decl_ctx_to_die.end(); it++) 2379 result.push_back(it->second); 2380 return result; 2381} 2382 2383CompilerDecl DWARFASTParserClang::GetDeclForUIDFromDWARF(const DWARFDIE &die) { 2384 clang::Decl *clang_decl = GetClangDeclForDIE(die); 2385 if (clang_decl != nullptr) 2386 return CompilerDecl(&m_ast, clang_decl); 2387 return CompilerDecl(); 2388} 2389 2390CompilerDeclContext 2391DWARFASTParserClang::GetDeclContextForUIDFromDWARF(const DWARFDIE &die) { 2392 clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE(die); 2393 if (clang_decl_ctx) 2394 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2395 return CompilerDeclContext(); 2396} 2397 2398CompilerDeclContext 2399DWARFASTParserClang::GetDeclContextContainingUIDFromDWARF(const DWARFDIE &die) { 2400 clang::DeclContext *clang_decl_ctx = 2401 GetClangDeclContextContainingDIE(die, nullptr); 2402 if (clang_decl_ctx) 2403 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2404 return CompilerDeclContext(); 2405} 2406 2407size_t DWARFASTParserClang::ParseChildEnumerators( 2408 const SymbolContext &sc, lldb_private::CompilerType &clang_type, 2409 bool is_signed, uint32_t enumerator_byte_size, const DWARFDIE &parent_die) { 2410 if (!parent_die) 2411 return 0; 2412 2413 size_t enumerators_added = 0; 2414 2415 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2416 die = die.GetSibling()) { 2417 const dw_tag_t tag = die.Tag(); 2418 if (tag == DW_TAG_enumerator) { 2419 DWARFAttributes attributes; 2420 const size_t num_child_attributes = die.GetAttributes(attributes); 2421 if (num_child_attributes > 0) { 2422 const char *name = NULL; 2423 bool got_value = false; 2424 int64_t enum_value = 0; 2425 Declaration decl; 2426 2427 uint32_t i; 2428 for (i = 0; i < num_child_attributes; ++i) { 2429 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2430 DWARFFormValue form_value; 2431 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2432 switch (attr) { 2433 case DW_AT_const_value: 2434 got_value = true; 2435 if (is_signed) 2436 enum_value = form_value.Signed(); 2437 else 2438 enum_value = form_value.Unsigned(); 2439 break; 2440 2441 case DW_AT_name: 2442 name = form_value.AsCString(); 2443 break; 2444 2445 case DW_AT_description: 2446 default: 2447 case DW_AT_decl_file: 2448 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 2449 form_value.Unsigned())); 2450 break; 2451 case DW_AT_decl_line: 2452 decl.SetLine(form_value.Unsigned()); 2453 break; 2454 case DW_AT_decl_column: 2455 decl.SetColumn(form_value.Unsigned()); 2456 break; 2457 case DW_AT_sibling: 2458 break; 2459 } 2460 } 2461 } 2462 2463 if (name && name[0] && got_value) { 2464 m_ast.AddEnumerationValueToEnumerationType( 2465 clang_type.GetOpaqueQualType(), 2466 m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType()), 2467 decl, name, enum_value, enumerator_byte_size * 8); 2468 ++enumerators_added; 2469 } 2470 } 2471 } 2472 } 2473 return enumerators_added; 2474} 2475 2476#if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE) 2477 2478class DIEStack { 2479public: 2480 void Push(const DWARFDIE &die) { m_dies.push_back(die); } 2481 2482 void LogDIEs(Log *log) { 2483 StreamString log_strm; 2484 const size_t n = m_dies.size(); 2485 log_strm.Printf("DIEStack[%" PRIu64 "]:\n", (uint64_t)n); 2486 for (size_t i = 0; i < n; i++) { 2487 std::string qualified_name; 2488 const DWARFDIE &die = m_dies[i]; 2489 die.GetQualifiedName(qualified_name); 2490 log_strm.Printf("[%" PRIu64 "] 0x%8.8x: %s name='%s'\n", (uint64_t)i, 2491 die.GetOffset(), die.GetTagAsCString(), 2492 qualified_name.c_str()); 2493 } 2494 log->PutCString(log_strm.GetData()); 2495 } 2496 void Pop() { m_dies.pop_back(); } 2497 2498 class ScopedPopper { 2499 public: 2500 ScopedPopper(DIEStack &die_stack) 2501 : m_die_stack(die_stack), m_valid(false) {} 2502 2503 void Push(const DWARFDIE &die) { 2504 m_valid = true; 2505 m_die_stack.Push(die); 2506 } 2507 2508 ~ScopedPopper() { 2509 if (m_valid) 2510 m_die_stack.Pop(); 2511 } 2512 2513 protected: 2514 DIEStack &m_die_stack; 2515 bool m_valid; 2516 }; 2517 2518protected: 2519 typedef std::vector<DWARFDIE> Stack; 2520 Stack m_dies; 2521}; 2522#endif 2523 2524Function *DWARFASTParserClang::ParseFunctionFromDWARF(const SymbolContext &sc, 2525 const DWARFDIE &die) { 2526 DWARFRangeList func_ranges; 2527 const char *name = NULL; 2528 const char *mangled = NULL; 2529 int decl_file = 0; 2530 int decl_line = 0; 2531 int decl_column = 0; 2532 int call_file = 0; 2533 int call_line = 0; 2534 int call_column = 0; 2535 DWARFExpression frame_base(die.GetCU()); 2536 2537 const dw_tag_t tag = die.Tag(); 2538 2539 if (tag != DW_TAG_subprogram) 2540 return NULL; 2541 2542 if (die.GetDIENamesAndRanges(name, mangled, func_ranges, decl_file, decl_line, 2543 decl_column, call_file, call_line, call_column, 2544 &frame_base)) { 2545 2546 // Union of all ranges in the function DIE (if the function is 2547 // discontiguous) 2548 AddressRange func_range; 2549 lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase(0); 2550 lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd(0); 2551 if (lowest_func_addr != LLDB_INVALID_ADDRESS && 2552 lowest_func_addr <= highest_func_addr) { 2553 ModuleSP module_sp(die.GetModule()); 2554 func_range.GetBaseAddress().ResolveAddressUsingFileSections( 2555 lowest_func_addr, module_sp->GetSectionList()); 2556 if (func_range.GetBaseAddress().IsValid()) 2557 func_range.SetByteSize(highest_func_addr - lowest_func_addr); 2558 } 2559 2560 if (func_range.GetBaseAddress().IsValid()) { 2561 Mangled func_name; 2562 if (mangled) 2563 func_name.SetValue(ConstString(mangled), true); 2564 else if (die.GetParent().Tag() == DW_TAG_compile_unit && 2565 Language::LanguageIsCPlusPlus(die.GetLanguage()) && name && 2566 strcmp(name, "main") != 0) { 2567 // If the mangled name is not present in the DWARF, generate the 2568 // demangled name 2569 // using the decl context. We skip if the function is "main" as its name 2570 // is 2571 // never mangled. 2572 bool is_static = false; 2573 bool is_variadic = false; 2574 bool has_template_params = false; 2575 unsigned type_quals = 0; 2576 std::vector<CompilerType> param_types; 2577 std::vector<clang::ParmVarDecl *> param_decls; 2578 DWARFDeclContext decl_ctx; 2579 StreamString sstr; 2580 2581 die.GetDWARFDeclContext(decl_ctx); 2582 sstr << decl_ctx.GetQualifiedName(); 2583 2584 clang::DeclContext *containing_decl_ctx = 2585 GetClangDeclContextContainingDIE(die, nullptr); 2586 ParseChildParameters(sc, containing_decl_ctx, die, true, is_static, 2587 is_variadic, has_template_params, param_types, 2588 param_decls, type_quals); 2589 sstr << "("; 2590 for (size_t i = 0; i < param_types.size(); i++) { 2591 if (i > 0) 2592 sstr << ", "; 2593 sstr << param_types[i].GetTypeName(); 2594 } 2595 if (is_variadic) 2596 sstr << ", ..."; 2597 sstr << ")"; 2598 if (type_quals & clang::Qualifiers::Const) 2599 sstr << " const"; 2600 2601 func_name.SetValue(ConstString(sstr.GetString()), false); 2602 } else 2603 func_name.SetValue(ConstString(name), false); 2604 2605 FunctionSP func_sp; 2606 std::unique_ptr<Declaration> decl_ap; 2607 if (decl_file != 0 || decl_line != 0 || decl_column != 0) 2608 decl_ap.reset(new Declaration( 2609 sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file), 2610 decl_line, decl_column)); 2611 2612 SymbolFileDWARF *dwarf = die.GetDWARF(); 2613 // Supply the type _only_ if it has already been parsed 2614 Type *func_type = dwarf->GetDIEToType().lookup(die.GetDIE()); 2615 2616 assert(func_type == NULL || func_type != DIE_IS_BEING_PARSED); 2617 2618 if (dwarf->FixupAddress(func_range.GetBaseAddress())) { 2619 const user_id_t func_user_id = die.GetID(); 2620 func_sp.reset(new Function(sc.comp_unit, 2621 func_user_id, // UserID is the DIE offset 2622 func_user_id, func_name, func_type, 2623 func_range)); // first address range 2624 2625 if (func_sp.get() != NULL) { 2626 if (frame_base.IsValid()) 2627 func_sp->GetFrameBaseExpression() = frame_base; 2628 sc.comp_unit->AddFunction(func_sp); 2629 return func_sp.get(); 2630 } 2631 } 2632 } 2633 } 2634 return NULL; 2635} 2636 2637bool DWARFASTParserClang::ParseChildMembers( 2638 const SymbolContext &sc, const DWARFDIE &parent_die, 2639 CompilerType &class_clang_type, const LanguageType class_language, 2640 std::vector<clang::CXXBaseSpecifier *> &base_classes, 2641 std::vector<int> &member_accessibilities, 2642 DWARFDIECollection &member_function_dies, 2643 DelayedPropertyList &delayed_properties, AccessType &default_accessibility, 2644 bool &is_a_class, ClangASTImporter::LayoutInfo &layout_info) { 2645 if (!parent_die) 2646 return 0; 2647 2648 // Get the parent byte size so we can verify any members will fit 2649 const uint64_t parent_byte_size = 2650 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, UINT64_MAX); 2651 const uint64_t parent_bit_size = 2652 parent_byte_size == UINT64_MAX ? UINT64_MAX : parent_byte_size * 8; 2653 2654 uint32_t member_idx = 0; 2655 BitfieldInfo last_field_info; 2656 2657 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule(); 2658 ClangASTContext *ast = 2659 llvm::dyn_cast_or_null<ClangASTContext>(class_clang_type.GetTypeSystem()); 2660 if (ast == nullptr) 2661 return 0; 2662 2663 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2664 die = die.GetSibling()) { 2665 dw_tag_t tag = die.Tag(); 2666 2667 switch (tag) { 2668 case DW_TAG_member: 2669 case DW_TAG_APPLE_property: { 2670 DWARFAttributes attributes; 2671 const size_t num_attributes = die.GetAttributes(attributes); 2672 if (num_attributes > 0) { 2673 Declaration decl; 2674 // DWARFExpression location; 2675 const char *name = NULL; 2676 const char *prop_name = NULL; 2677 const char *prop_getter_name = NULL; 2678 const char *prop_setter_name = NULL; 2679 uint32_t prop_attributes = 0; 2680 2681 bool is_artificial = false; 2682 DWARFFormValue encoding_form; 2683 AccessType accessibility = eAccessNone; 2684 uint32_t member_byte_offset = 2685 (parent_die.Tag() == DW_TAG_union_type) ? 0 : UINT32_MAX; 2686 size_t byte_size = 0; 2687 int64_t bit_offset = 0; 2688 uint64_t data_bit_offset = UINT64_MAX; 2689 size_t bit_size = 0; 2690 bool is_external = 2691 false; // On DW_TAG_members, this means the member is static 2692 uint32_t i; 2693 for (i = 0; i < num_attributes && !is_artificial; ++i) { 2694 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2695 DWARFFormValue form_value; 2696 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2697 switch (attr) { 2698 case DW_AT_decl_file: 2699 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 2700 form_value.Unsigned())); 2701 break; 2702 case DW_AT_decl_line: 2703 decl.SetLine(form_value.Unsigned()); 2704 break; 2705 case DW_AT_decl_column: 2706 decl.SetColumn(form_value.Unsigned()); 2707 break; 2708 case DW_AT_name: 2709 name = form_value.AsCString(); 2710 break; 2711 case DW_AT_type: 2712 encoding_form = form_value; 2713 break; 2714 case DW_AT_bit_offset: 2715 bit_offset = form_value.Signed(); 2716 break; 2717 case DW_AT_bit_size: 2718 bit_size = form_value.Unsigned(); 2719 break; 2720 case DW_AT_byte_size: 2721 byte_size = form_value.Unsigned(); 2722 break; 2723 case DW_AT_data_bit_offset: 2724 data_bit_offset = form_value.Unsigned(); 2725 break; 2726 case DW_AT_data_member_location: 2727 if (form_value.BlockData()) { 2728 Value initialValue(0); 2729 Value memberOffset(0); 2730 const DWARFDataExtractor &debug_info_data = 2731 die.GetDWARF()->get_debug_info_data(); 2732 uint32_t block_length = form_value.Unsigned(); 2733 uint32_t block_offset = 2734 form_value.BlockData() - debug_info_data.GetDataStart(); 2735 if (DWARFExpression::Evaluate( 2736 nullptr, // ExecutionContext * 2737 nullptr, // ClangExpressionVariableList * 2738 nullptr, // ClangExpressionDeclMap * 2739 nullptr, // RegisterContext * 2740 module_sp, debug_info_data, die.GetCU(), block_offset, 2741 block_length, eRegisterKindDWARF, &initialValue, 2742 nullptr, memberOffset, nullptr)) { 2743 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 2744 } 2745 } else { 2746 // With DWARF 3 and later, if the value is an integer constant, 2747 // this form value is the offset in bytes from the beginning 2748 // of the containing entity. 2749 member_byte_offset = form_value.Unsigned(); 2750 } 2751 break; 2752 2753 case DW_AT_accessibility: 2754 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 2755 break; 2756 case DW_AT_artificial: 2757 is_artificial = form_value.Boolean(); 2758 break; 2759 case DW_AT_APPLE_property_name: 2760 prop_name = form_value.AsCString(); 2761 break; 2762 case DW_AT_APPLE_property_getter: 2763 prop_getter_name = form_value.AsCString(); 2764 break; 2765 case DW_AT_APPLE_property_setter: 2766 prop_setter_name = form_value.AsCString(); 2767 break; 2768 case DW_AT_APPLE_property_attribute: 2769 prop_attributes = form_value.Unsigned(); 2770 break; 2771 case DW_AT_external: 2772 is_external = form_value.Boolean(); 2773 break; 2774 2775 default: 2776 case DW_AT_declaration: 2777 case DW_AT_description: 2778 case DW_AT_mutable: 2779 case DW_AT_visibility: 2780 case DW_AT_sibling: 2781 break; 2782 } 2783 } 2784 } 2785 2786 if (prop_name) { 2787 ConstString fixed_getter; 2788 ConstString fixed_setter; 2789 2790 // Check if the property getter/setter were provided as full 2791 // names. We want basenames, so we extract them. 2792 2793 if (prop_getter_name && prop_getter_name[0] == '-') { 2794 ObjCLanguage::MethodName prop_getter_method(prop_getter_name, true); 2795 prop_getter_name = prop_getter_method.GetSelector().GetCString(); 2796 } 2797 2798 if (prop_setter_name && prop_setter_name[0] == '-') { 2799 ObjCLanguage::MethodName prop_setter_method(prop_setter_name, true); 2800 prop_setter_name = prop_setter_method.GetSelector().GetCString(); 2801 } 2802 2803 // If the names haven't been provided, they need to be 2804 // filled in. 2805 2806 if (!prop_getter_name) { 2807 prop_getter_name = prop_name; 2808 } 2809 if (!prop_setter_name && prop_name[0] && 2810 !(prop_attributes & DW_APPLE_PROPERTY_readonly)) { 2811 StreamString ss; 2812 2813 ss.Printf("set%c%s:", toupper(prop_name[0]), &prop_name[1]); 2814 2815 fixed_setter.SetString(ss.GetString()); 2816 prop_setter_name = fixed_setter.GetCString(); 2817 } 2818 } 2819 2820 // Clang has a DWARF generation bug where sometimes it 2821 // represents fields that are references with bad byte size 2822 // and bit size/offset information such as: 2823 // 2824 // DW_AT_byte_size( 0x00 ) 2825 // DW_AT_bit_size( 0x40 ) 2826 // DW_AT_bit_offset( 0xffffffffffffffc0 ) 2827 // 2828 // So check the bit offset to make sure it is sane, and if 2829 // the values are not sane, remove them. If we don't do this 2830 // then we will end up with a crash if we try to use this 2831 // type in an expression when clang becomes unhappy with its 2832 // recycled debug info. 2833 2834 if (byte_size == 0 && bit_offset < 0) { 2835 bit_size = 0; 2836 bit_offset = 0; 2837 } 2838 2839 // FIXME: Make Clang ignore Objective-C accessibility for expressions 2840 if (class_language == eLanguageTypeObjC || 2841 class_language == eLanguageTypeObjC_plus_plus) 2842 accessibility = eAccessNone; 2843 2844 if (member_idx == 0 && !is_artificial && name && 2845 (strstr(name, "_vptr$") == name)) { 2846 // Not all compilers will mark the vtable pointer 2847 // member as artificial (llvm-gcc). We can't have 2848 // the virtual members in our classes otherwise it 2849 // throws off all child offsets since we end up 2850 // having and extra pointer sized member in our 2851 // class layouts. 2852 is_artificial = true; 2853 } 2854 2855 // Handle static members 2856 if (is_external && member_byte_offset == UINT32_MAX) { 2857 Type *var_type = die.ResolveTypeUID(DIERef(encoding_form)); 2858 2859 if (var_type) { 2860 if (accessibility == eAccessNone) 2861 accessibility = eAccessPublic; 2862 ClangASTContext::AddVariableToRecordType( 2863 class_clang_type, name, var_type->GetLayoutCompilerType(), 2864 accessibility); 2865 } 2866 break; 2867 } 2868 2869 if (is_artificial == false) { 2870 Type *member_type = die.ResolveTypeUID(DIERef(encoding_form)); 2871 2872 clang::FieldDecl *field_decl = NULL; 2873 if (tag == DW_TAG_member) { 2874 if (member_type) { 2875 if (accessibility == eAccessNone) 2876 accessibility = default_accessibility; 2877 member_accessibilities.push_back(accessibility); 2878 2879 uint64_t field_bit_offset = 2880 (member_byte_offset == UINT32_MAX ? 0 2881 : (member_byte_offset * 8)); 2882 if (bit_size > 0) { 2883 2884 BitfieldInfo this_field_info; 2885 this_field_info.bit_offset = field_bit_offset; 2886 this_field_info.bit_size = bit_size; 2887 2888 ///////////////////////////////////////////////////////////// 2889 // How to locate a field given the DWARF debug information 2890 // 2891 // AT_byte_size indicates the size of the word in which the 2892 // bit offset must be interpreted. 2893 // 2894 // AT_data_member_location indicates the byte offset of the 2895 // word from the base address of the structure. 2896 // 2897 // AT_bit_offset indicates how many bits into the word 2898 // (according to the host endianness) the low-order bit of 2899 // the field starts. AT_bit_offset can be negative. 2900 // 2901 // AT_bit_size indicates the size of the field in bits. 2902 ///////////////////////////////////////////////////////////// 2903 2904 if (data_bit_offset != UINT64_MAX) { 2905 this_field_info.bit_offset = data_bit_offset; 2906 } else { 2907 if (byte_size == 0) 2908 byte_size = member_type->GetByteSize(); 2909 2910 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 2911 if (objfile->GetByteOrder() == eByteOrderLittle) { 2912 this_field_info.bit_offset += byte_size * 8; 2913 this_field_info.bit_offset -= (bit_offset + bit_size); 2914 } else { 2915 this_field_info.bit_offset += bit_offset; 2916 } 2917 } 2918 2919 if ((this_field_info.bit_offset >= parent_bit_size) || 2920 !last_field_info.NextBitfieldOffsetIsValid( 2921 this_field_info.bit_offset)) { 2922 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 2923 objfile->GetModule()->ReportWarning( 2924 "0x%8.8" PRIx64 ": %s bitfield named \"%s\" has invalid " 2925 "bit offset (0x%8.8" PRIx64 2926 ") member will be ignored. Please file a bug against the " 2927 "compiler and include the preprocessed output for %s\n", 2928 die.GetID(), DW_TAG_value_to_name(tag), name, 2929 this_field_info.bit_offset, 2930 sc.comp_unit ? sc.comp_unit->GetPath().c_str() 2931 : "the source file"); 2932 this_field_info.Clear(); 2933 continue; 2934 } 2935 2936 // Update the field bit offset we will report for layout 2937 field_bit_offset = this_field_info.bit_offset; 2938 2939 // If the member to be emitted did not start on a character 2940 // boundary and there is 2941 // empty space between the last field and this one, then we need 2942 // to emit an 2943 // anonymous member filling up the space up to its start. There 2944 // are three cases 2945 // here: 2946 // 2947 // 1 If the previous member ended on a character boundary, then 2948 // we can emit an 2949 // anonymous member starting at the most recent character 2950 // boundary. 2951 // 2952 // 2 If the previous member did not end on a character boundary 2953 // and the distance 2954 // from the end of the previous member to the current member 2955 // is less than a 2956 // word width, then we can emit an anonymous member starting 2957 // right after the 2958 // previous member and right before this member. 2959 // 2960 // 3 If the previous member did not end on a character boundary 2961 // and the distance 2962 // from the end of the previous member to the current member 2963 // is greater than 2964 // or equal a word width, then we act as in Case 1. 2965 2966 const uint64_t character_width = 8; 2967 const uint64_t word_width = 32; 2968 2969 // Objective-C has invalid DW_AT_bit_offset values in older 2970 // versions 2971 // of clang, so we have to be careful and only insert unnamed 2972 // bitfields 2973 // if we have a new enough clang. 2974 bool detect_unnamed_bitfields = true; 2975 2976 if (class_language == eLanguageTypeObjC || 2977 class_language == eLanguageTypeObjC_plus_plus) 2978 detect_unnamed_bitfields = 2979 die.GetCU()->Supports_unnamed_objc_bitfields(); 2980 2981 if (detect_unnamed_bitfields) { 2982 BitfieldInfo anon_field_info; 2983 2984 if ((this_field_info.bit_offset % character_width) != 2985 0) // not char aligned 2986 { 2987 uint64_t last_field_end = 0; 2988 2989 if (last_field_info.IsValid()) 2990 last_field_end = 2991 last_field_info.bit_offset + last_field_info.bit_size; 2992 2993 if (this_field_info.bit_offset != last_field_end) { 2994 if (((last_field_end % character_width) == 0) || // case 1 2995 (this_field_info.bit_offset - last_field_end >= 2996 word_width)) // case 3 2997 { 2998 anon_field_info.bit_size = 2999 this_field_info.bit_offset % character_width; 3000 anon_field_info.bit_offset = 3001 this_field_info.bit_offset - 3002 anon_field_info.bit_size; 3003 } else // case 2 3004 { 3005 anon_field_info.bit_size = 3006 this_field_info.bit_offset - last_field_end; 3007 anon_field_info.bit_offset = last_field_end; 3008 } 3009 } 3010 } 3011 3012 if (anon_field_info.IsValid()) { 3013 clang::FieldDecl *unnamed_bitfield_decl = 3014 ClangASTContext::AddFieldToRecordType( 3015 class_clang_type, NULL, 3016 m_ast.GetBuiltinTypeForEncodingAndBitSize( 3017 eEncodingSint, word_width), 3018 accessibility, anon_field_info.bit_size); 3019 3020 layout_info.field_offsets.insert(std::make_pair( 3021 unnamed_bitfield_decl, anon_field_info.bit_offset)); 3022 } 3023 } 3024 last_field_info = this_field_info; 3025 } else { 3026 last_field_info.Clear(); 3027 } 3028 3029 CompilerType member_clang_type = 3030 member_type->GetLayoutCompilerType(); 3031 if (!member_clang_type.IsCompleteType()) 3032 member_clang_type.GetCompleteType(); 3033 3034 { 3035 // Older versions of clang emit array[0] and array[1] in the 3036 // same way (<rdar://problem/12566646>). 3037 // If the current field is at the end of the structure, then 3038 // there is definitely no room for extra 3039 // elements and we override the type to array[0]. 3040 3041 CompilerType member_array_element_type; 3042 uint64_t member_array_size; 3043 bool member_array_is_incomplete; 3044 3045 if (member_clang_type.IsArrayType( 3046 &member_array_element_type, &member_array_size, 3047 &member_array_is_incomplete) && 3048 !member_array_is_incomplete) { 3049 uint64_t parent_byte_size = 3050 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 3051 UINT64_MAX); 3052 3053 if (member_byte_offset >= parent_byte_size) { 3054 if (member_array_size != 1 && 3055 (member_array_size != 0 || 3056 member_byte_offset > parent_byte_size)) { 3057 module_sp->ReportError( 3058 "0x%8.8" PRIx64 3059 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 3060 " which extends beyond the bounds of 0x%8.8" PRIx64, 3061 die.GetID(), name, encoding_form.Reference(), 3062 parent_die.GetID()); 3063 } 3064 3065 member_clang_type = m_ast.CreateArrayType( 3066 member_array_element_type, 0, false); 3067 } 3068 } 3069 } 3070 3071 if (ClangASTContext::IsCXXClassType(member_clang_type) && 3072 member_clang_type.GetCompleteType() == false) { 3073 if (die.GetCU()->GetProducer() == 3074 DWARFCompileUnit::eProducerClang) 3075 module_sp->ReportError( 3076 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3077 "0x%8.8x (%s) whose type is a forward declaration, not a " 3078 "complete definition.\nTry compiling the source file " 3079 "with -fno-limit-debug-info", 3080 parent_die.GetOffset(), parent_die.GetName(), 3081 die.GetOffset(), name); 3082 else 3083 module_sp->ReportError( 3084 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3085 "0x%8.8x (%s) whose type is a forward declaration, not a " 3086 "complete definition.\nPlease file a bug against the " 3087 "compiler and include the preprocessed output for %s", 3088 parent_die.GetOffset(), parent_die.GetName(), 3089 die.GetOffset(), name, 3090 sc.comp_unit ? sc.comp_unit->GetPath().c_str() 3091 : "the source file"); 3092 // We have no choice other than to pretend that the member class 3093 // is complete. If we don't do this, clang will crash when 3094 // trying 3095 // to layout the class. Since we provide layout assistance, all 3096 // ivars in this class and other classes will be fine, this is 3097 // the best we can do short of crashing. 3098 if (ClangASTContext::StartTagDeclarationDefinition( 3099 member_clang_type)) { 3100 ClangASTContext::CompleteTagDeclarationDefinition( 3101 member_clang_type); 3102 } else { 3103 module_sp->ReportError( 3104 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3105 "0x%8.8x (%s) whose type claims to be a C++ class but we " 3106 "were not able to start its definition.\nPlease file a " 3107 "bug and attach the file at the start of this error " 3108 "message", 3109 parent_die.GetOffset(), parent_die.GetName(), 3110 die.GetOffset(), name); 3111 } 3112 } 3113 3114 field_decl = ClangASTContext::AddFieldToRecordType( 3115 class_clang_type, name, member_clang_type, accessibility, 3116 bit_size); 3117 3118 m_ast.SetMetadataAsUserID(field_decl, die.GetID()); 3119 3120 layout_info.field_offsets.insert( 3121 std::make_pair(field_decl, field_bit_offset)); 3122 } else { 3123 if (name) 3124 module_sp->ReportError( 3125 "0x%8.8" PRIx64 3126 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 3127 " which was unable to be parsed", 3128 die.GetID(), name, encoding_form.Reference()); 3129 else 3130 module_sp->ReportError( 3131 "0x%8.8" PRIx64 3132 ": DW_TAG_member refers to type 0x%8.8" PRIx64 3133 " which was unable to be parsed", 3134 die.GetID(), encoding_form.Reference()); 3135 } 3136 } 3137 3138 if (prop_name != NULL && member_type) { 3139 clang::ObjCIvarDecl *ivar_decl = NULL; 3140 3141 if (field_decl) { 3142 ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl); 3143 assert(ivar_decl != NULL); 3144 } 3145 3146 ClangASTMetadata metadata; 3147 metadata.SetUserID(die.GetID()); 3148 delayed_properties.push_back(DelayedAddObjCClassProperty( 3149 class_clang_type, prop_name, 3150 member_type->GetLayoutCompilerType(), ivar_decl, 3151 prop_setter_name, prop_getter_name, prop_attributes, 3152 &metadata)); 3153 3154 if (ivar_decl) 3155 m_ast.SetMetadataAsUserID(ivar_decl, die.GetID()); 3156 } 3157 } 3158 } 3159 ++member_idx; 3160 } break; 3161 3162 case DW_TAG_subprogram: 3163 // Let the type parsing code handle this one for us. 3164 member_function_dies.Append(die); 3165 break; 3166 3167 case DW_TAG_inheritance: { 3168 is_a_class = true; 3169 if (default_accessibility == eAccessNone) 3170 default_accessibility = eAccessPrivate; 3171 // TODO: implement DW_TAG_inheritance type parsing 3172 DWARFAttributes attributes; 3173 const size_t num_attributes = die.GetAttributes(attributes); 3174 if (num_attributes > 0) { 3175 Declaration decl; 3176 DWARFExpression location(die.GetCU()); 3177 DWARFFormValue encoding_form; 3178 AccessType accessibility = default_accessibility; 3179 bool is_virtual = false; 3180 bool is_base_of_class = true; 3181 off_t member_byte_offset = 0; 3182 uint32_t i; 3183 for (i = 0; i < num_attributes; ++i) { 3184 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3185 DWARFFormValue form_value; 3186 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3187 switch (attr) { 3188 case DW_AT_decl_file: 3189 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 3190 form_value.Unsigned())); 3191 break; 3192 case DW_AT_decl_line: 3193 decl.SetLine(form_value.Unsigned()); 3194 break; 3195 case DW_AT_decl_column: 3196 decl.SetColumn(form_value.Unsigned()); 3197 break; 3198 case DW_AT_type: 3199 encoding_form = form_value; 3200 break; 3201 case DW_AT_data_member_location: 3202 if (form_value.BlockData()) { 3203 Value initialValue(0); 3204 Value memberOffset(0); 3205 const DWARFDataExtractor &debug_info_data = 3206 die.GetDWARF()->get_debug_info_data(); 3207 uint32_t block_length = form_value.Unsigned(); 3208 uint32_t block_offset = 3209 form_value.BlockData() - debug_info_data.GetDataStart(); 3210 if (DWARFExpression::Evaluate( 3211 nullptr, nullptr, nullptr, nullptr, module_sp, 3212 debug_info_data, die.GetCU(), block_offset, 3213 block_length, eRegisterKindDWARF, &initialValue, 3214 nullptr, memberOffset, nullptr)) { 3215 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 3216 } 3217 } else { 3218 // With DWARF 3 and later, if the value is an integer constant, 3219 // this form value is the offset in bytes from the beginning 3220 // of the containing entity. 3221 member_byte_offset = form_value.Unsigned(); 3222 } 3223 break; 3224 3225 case DW_AT_accessibility: 3226 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 3227 break; 3228 3229 case DW_AT_virtuality: 3230 is_virtual = form_value.Boolean(); 3231 break; 3232 3233 case DW_AT_sibling: 3234 break; 3235 3236 default: 3237 break; 3238 } 3239 } 3240 } 3241 3242 Type *base_class_type = die.ResolveTypeUID(DIERef(encoding_form)); 3243 if (base_class_type == NULL) { 3244 module_sp->ReportError("0x%8.8x: DW_TAG_inheritance failed to " 3245 "resolve the base class at 0x%8.8" PRIx64 3246 " from enclosing type 0x%8.8x. \nPlease file " 3247 "a bug and attach the file at the start of " 3248 "this error message", 3249 die.GetOffset(), encoding_form.Reference(), 3250 parent_die.GetOffset()); 3251 break; 3252 } 3253 3254 CompilerType base_class_clang_type = 3255 base_class_type->GetFullCompilerType(); 3256 assert(base_class_clang_type); 3257 if (class_language == eLanguageTypeObjC) { 3258 ast->SetObjCSuperClass(class_clang_type, base_class_clang_type); 3259 } else { 3260 base_classes.push_back(ast->CreateBaseClassSpecifier( 3261 base_class_clang_type.GetOpaqueQualType(), accessibility, 3262 is_virtual, is_base_of_class)); 3263 3264 if (is_virtual) { 3265 // Do not specify any offset for virtual inheritance. The DWARF 3266 // produced by clang doesn't 3267 // give us a constant offset, but gives us a DWARF expressions that 3268 // requires an actual object 3269 // in memory. the DW_AT_data_member_location for a virtual base 3270 // class looks like: 3271 // DW_AT_data_member_location( DW_OP_dup, DW_OP_deref, 3272 // DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref, 3273 // DW_OP_plus ) 3274 // Given this, there is really no valid response we can give to 3275 // clang for virtual base 3276 // class offsets, and this should eventually be removed from 3277 // LayoutRecordType() in the external 3278 // AST source in clang. 3279 } else { 3280 layout_info.base_offsets.insert(std::make_pair( 3281 ast->GetAsCXXRecordDecl( 3282 base_class_clang_type.GetOpaqueQualType()), 3283 clang::CharUnits::fromQuantity(member_byte_offset))); 3284 } 3285 } 3286 } 3287 } break; 3288 3289 default: 3290 break; 3291 } 3292 } 3293 3294 return true; 3295} 3296 3297size_t DWARFASTParserClang::ParseChildParameters( 3298 const SymbolContext &sc, clang::DeclContext *containing_decl_ctx, 3299 const DWARFDIE &parent_die, bool skip_artificial, bool &is_static, 3300 bool &is_variadic, bool &has_template_params, 3301 std::vector<CompilerType> &function_param_types, 3302 std::vector<clang::ParmVarDecl *> &function_param_decls, 3303 unsigned &type_quals) { 3304 if (!parent_die) 3305 return 0; 3306 3307 size_t arg_idx = 0; 3308 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 3309 die = die.GetSibling()) { 3310 const dw_tag_t tag = die.Tag(); 3311 switch (tag) { 3312 case DW_TAG_formal_parameter: { 3313 DWARFAttributes attributes; 3314 const size_t num_attributes = die.GetAttributes(attributes); 3315 if (num_attributes > 0) { 3316 const char *name = NULL; 3317 Declaration decl; 3318 DWARFFormValue param_type_die_form; 3319 bool is_artificial = false; 3320 // one of None, Auto, Register, Extern, Static, PrivateExtern 3321 3322 clang::StorageClass storage = clang::SC_None; 3323 uint32_t i; 3324 for (i = 0; i < num_attributes; ++i) { 3325 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3326 DWARFFormValue form_value; 3327 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3328 switch (attr) { 3329 case DW_AT_decl_file: 3330 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 3331 form_value.Unsigned())); 3332 break; 3333 case DW_AT_decl_line: 3334 decl.SetLine(form_value.Unsigned()); 3335 break; 3336 case DW_AT_decl_column: 3337 decl.SetColumn(form_value.Unsigned()); 3338 break; 3339 case DW_AT_name: 3340 name = form_value.AsCString(); 3341 break; 3342 case DW_AT_type: 3343 param_type_die_form = form_value; 3344 break; 3345 case DW_AT_artificial: 3346 is_artificial = form_value.Boolean(); 3347 break; 3348 case DW_AT_location: 3349 // if (form_value.BlockData()) 3350 // { 3351 // const DWARFDataExtractor& 3352 // debug_info_data = debug_info(); 3353 // uint32_t block_length = 3354 // form_value.Unsigned(); 3355 // DWARFDataExtractor 3356 // location(debug_info_data, 3357 // form_value.BlockData() - 3358 // debug_info_data.GetDataStart(), 3359 // block_length); 3360 // } 3361 // else 3362 // { 3363 // } 3364 // break; 3365 case DW_AT_const_value: 3366 case DW_AT_default_value: 3367 case DW_AT_description: 3368 case DW_AT_endianity: 3369 case DW_AT_is_optional: 3370 case DW_AT_segment: 3371 case DW_AT_variable_parameter: 3372 default: 3373 case DW_AT_abstract_origin: 3374 case DW_AT_sibling: 3375 break; 3376 } 3377 } 3378 } 3379 3380 bool skip = false; 3381 if (skip_artificial) { 3382 if (is_artificial) { 3383 // In order to determine if a C++ member function is 3384 // "const" we have to look at the const-ness of "this"... 3385 // Ugly, but that 3386 if (arg_idx == 0) { 3387 if (DeclKindIsCXXClass(containing_decl_ctx->getDeclKind())) { 3388 // Often times compilers omit the "this" name for the 3389 // specification DIEs, so we can't rely upon the name 3390 // being in the formal parameter DIE... 3391 if (name == NULL || ::strcmp(name, "this") == 0) { 3392 Type *this_type = 3393 die.ResolveTypeUID(DIERef(param_type_die_form)); 3394 if (this_type) { 3395 uint32_t encoding_mask = this_type->GetEncodingMask(); 3396 if (encoding_mask & Type::eEncodingIsPointerUID) { 3397 is_static = false; 3398 3399 if (encoding_mask & (1u << Type::eEncodingIsConstUID)) 3400 type_quals |= clang::Qualifiers::Const; 3401 if (encoding_mask & (1u << Type::eEncodingIsVolatileUID)) 3402 type_quals |= clang::Qualifiers::Volatile; 3403 } 3404 } 3405 } 3406 } 3407 } 3408 skip = true; 3409 } else { 3410 3411 // HACK: Objective C formal parameters "self" and "_cmd" 3412 // are not marked as artificial in the DWARF... 3413 CompileUnit *comp_unit = die.GetLLDBCompileUnit(); 3414 if (comp_unit) { 3415 switch (comp_unit->GetLanguage()) { 3416 case eLanguageTypeObjC: 3417 case eLanguageTypeObjC_plus_plus: 3418 if (name && name[0] && 3419 (strcmp(name, "self") == 0 || strcmp(name, "_cmd") == 0)) 3420 skip = true; 3421 break; 3422 default: 3423 break; 3424 } 3425 } 3426 } 3427 } 3428 3429 if (!skip) { 3430 Type *type = die.ResolveTypeUID(DIERef(param_type_die_form)); 3431 if (type) { 3432 function_param_types.push_back(type->GetForwardCompilerType()); 3433 3434 clang::ParmVarDecl *param_var_decl = 3435 m_ast.CreateParameterDeclaration( 3436 name, type->GetForwardCompilerType(), storage); 3437 assert(param_var_decl); 3438 function_param_decls.push_back(param_var_decl); 3439 3440 m_ast.SetMetadataAsUserID(param_var_decl, die.GetID()); 3441 } 3442 } 3443 } 3444 arg_idx++; 3445 } break; 3446 3447 case DW_TAG_unspecified_parameters: 3448 is_variadic = true; 3449 break; 3450 3451 case DW_TAG_template_type_parameter: 3452 case DW_TAG_template_value_parameter: 3453 // The one caller of this was never using the template_param_infos, 3454 // and the local variable was taking up a large amount of stack space 3455 // in SymbolFileDWARF::ParseType() so this was removed. If we ever need 3456 // the template params back, we can add them back. 3457 // ParseTemplateDIE (dwarf_cu, die, template_param_infos); 3458 has_template_params = true; 3459 break; 3460 3461 default: 3462 break; 3463 } 3464 } 3465 return arg_idx; 3466} 3467 3468void DWARFASTParserClang::ParseChildArrayInfo( 3469 const SymbolContext &sc, const DWARFDIE &parent_die, int64_t &first_index, 3470 std::vector<uint64_t> &element_orders, uint32_t &byte_stride, 3471 uint32_t &bit_stride) { 3472 if (!parent_die) 3473 return; 3474 3475 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 3476 die = die.GetSibling()) { 3477 const dw_tag_t tag = die.Tag(); 3478 switch (tag) { 3479 case DW_TAG_subrange_type: { 3480 DWARFAttributes attributes; 3481 const size_t num_child_attributes = die.GetAttributes(attributes); 3482 if (num_child_attributes > 0) { 3483 uint64_t num_elements = 0; 3484 uint64_t lower_bound = 0; 3485 uint64_t upper_bound = 0; 3486 bool upper_bound_valid = false; 3487 uint32_t i; 3488 for (i = 0; i < num_child_attributes; ++i) { 3489 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3490 DWARFFormValue form_value; 3491 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3492 switch (attr) { 3493 case DW_AT_name: 3494 break; 3495 3496 case DW_AT_count: 3497 num_elements = form_value.Unsigned(); 3498 break; 3499 3500 case DW_AT_bit_stride: 3501 bit_stride = form_value.Unsigned(); 3502 break; 3503 3504 case DW_AT_byte_stride: 3505 byte_stride = form_value.Unsigned(); 3506 break; 3507 3508 case DW_AT_lower_bound: 3509 lower_bound = form_value.Unsigned(); 3510 break; 3511 3512 case DW_AT_upper_bound: 3513 upper_bound_valid = true; 3514 upper_bound = form_value.Unsigned(); 3515 break; 3516 3517 default: 3518 case DW_AT_abstract_origin: 3519 case DW_AT_accessibility: 3520 case DW_AT_allocated: 3521 case DW_AT_associated: 3522 case DW_AT_data_location: 3523 case DW_AT_declaration: 3524 case DW_AT_description: 3525 case DW_AT_sibling: 3526 case DW_AT_threads_scaled: 3527 case DW_AT_type: 3528 case DW_AT_visibility: 3529 break; 3530 } 3531 } 3532 } 3533 3534 if (num_elements == 0) { 3535 if (upper_bound_valid && upper_bound >= lower_bound) 3536 num_elements = upper_bound - lower_bound + 1; 3537 } 3538 3539 element_orders.push_back(num_elements); 3540 } 3541 } break; 3542 } 3543 } 3544} 3545 3546Type *DWARFASTParserClang::GetTypeForDIE(const DWARFDIE &die) { 3547 if (die) { 3548 SymbolFileDWARF *dwarf = die.GetDWARF(); 3549 DWARFAttributes attributes; 3550 const size_t num_attributes = die.GetAttributes(attributes); 3551 if (num_attributes > 0) { 3552 DWARFFormValue type_die_form; 3553 for (size_t i = 0; i < num_attributes; ++i) { 3554 dw_attr_t attr = attributes.AttributeAtIndex(i); 3555 DWARFFormValue form_value; 3556 3557 if (attr == DW_AT_type && 3558 attributes.ExtractFormValueAtIndex(i, form_value)) 3559 return dwarf->ResolveTypeUID(dwarf->GetDIE(DIERef(form_value)), true); 3560 } 3561 } 3562 } 3563 3564 return nullptr; 3565} 3566 3567clang::Decl *DWARFASTParserClang::GetClangDeclForDIE(const DWARFDIE &die) { 3568 if (!die) 3569 return nullptr; 3570 3571 switch (die.Tag()) { 3572 case DW_TAG_variable: 3573 case DW_TAG_constant: 3574 case DW_TAG_formal_parameter: 3575 case DW_TAG_imported_declaration: 3576 case DW_TAG_imported_module: 3577 break; 3578 default: 3579 return nullptr; 3580 } 3581 3582 DIEToDeclMap::iterator cache_pos = m_die_to_decl.find(die.GetDIE()); 3583 if (cache_pos != m_die_to_decl.end()) 3584 return cache_pos->second; 3585 3586 if (DWARFDIE spec_die = die.GetReferencedDIE(DW_AT_specification)) { 3587 clang::Decl *decl = GetClangDeclForDIE(spec_die); 3588 m_die_to_decl[die.GetDIE()] = decl; 3589 m_decl_to_die[decl].insert(die.GetDIE()); 3590 return decl; 3591 } 3592 3593 if (DWARFDIE abstract_origin_die = 3594 die.GetReferencedDIE(DW_AT_abstract_origin)) { 3595 clang::Decl *decl = GetClangDeclForDIE(abstract_origin_die); 3596 m_die_to_decl[die.GetDIE()] = decl; 3597 m_decl_to_die[decl].insert(die.GetDIE()); 3598 return decl; 3599 } 3600 3601 clang::Decl *decl = nullptr; 3602 switch (die.Tag()) { 3603 case DW_TAG_variable: 3604 case DW_TAG_constant: 3605 case DW_TAG_formal_parameter: { 3606 SymbolFileDWARF *dwarf = die.GetDWARF(); 3607 Type *type = GetTypeForDIE(die); 3608 if (dwarf && type) { 3609 const char *name = die.GetName(); 3610 clang::DeclContext *decl_context = 3611 ClangASTContext::DeclContextGetAsDeclContext( 3612 dwarf->GetDeclContextContainingUID(die.GetID())); 3613 decl = m_ast.CreateVariableDeclaration( 3614 decl_context, name, 3615 ClangUtil::GetQualType(type->GetForwardCompilerType())); 3616 } 3617 break; 3618 } 3619 case DW_TAG_imported_declaration: { 3620 SymbolFileDWARF *dwarf = die.GetDWARF(); 3621 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3622 if (imported_uid) { 3623 CompilerDecl imported_decl = imported_uid.GetDecl(); 3624 if (imported_decl) { 3625 clang::DeclContext *decl_context = 3626 ClangASTContext::DeclContextGetAsDeclContext( 3627 dwarf->GetDeclContextContainingUID(die.GetID())); 3628 if (clang::NamedDecl *clang_imported_decl = 3629 llvm::dyn_cast<clang::NamedDecl>( 3630 (clang::Decl *)imported_decl.GetOpaqueDecl())) 3631 decl = 3632 m_ast.CreateUsingDeclaration(decl_context, clang_imported_decl); 3633 } 3634 } 3635 break; 3636 } 3637 case DW_TAG_imported_module: { 3638 SymbolFileDWARF *dwarf = die.GetDWARF(); 3639 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3640 3641 if (imported_uid) { 3642 CompilerDeclContext imported_decl_ctx = imported_uid.GetDeclContext(); 3643 if (imported_decl_ctx) { 3644 clang::DeclContext *decl_context = 3645 ClangASTContext::DeclContextGetAsDeclContext( 3646 dwarf->GetDeclContextContainingUID(die.GetID())); 3647 if (clang::NamespaceDecl *ns_decl = 3648 ClangASTContext::DeclContextGetAsNamespaceDecl( 3649 imported_decl_ctx)) 3650 decl = m_ast.CreateUsingDirectiveDeclaration(decl_context, ns_decl); 3651 } 3652 } 3653 break; 3654 } 3655 default: 3656 break; 3657 } 3658 3659 m_die_to_decl[die.GetDIE()] = decl; 3660 m_decl_to_die[decl].insert(die.GetDIE()); 3661 3662 return decl; 3663} 3664 3665clang::DeclContext * 3666DWARFASTParserClang::GetClangDeclContextForDIE(const DWARFDIE &die) { 3667 if (die) { 3668 clang::DeclContext *decl_ctx = GetCachedClangDeclContextForDIE(die); 3669 if (decl_ctx) 3670 return decl_ctx; 3671 3672 bool try_parsing_type = true; 3673 switch (die.Tag()) { 3674 case DW_TAG_compile_unit: 3675 decl_ctx = m_ast.GetTranslationUnitDecl(); 3676 try_parsing_type = false; 3677 break; 3678 3679 case DW_TAG_namespace: 3680 decl_ctx = ResolveNamespaceDIE(die); 3681 try_parsing_type = false; 3682 break; 3683 3684 case DW_TAG_lexical_block: 3685 decl_ctx = (clang::DeclContext *)ResolveBlockDIE(die); 3686 try_parsing_type = false; 3687 break; 3688 3689 default: 3690 break; 3691 } 3692 3693 if (decl_ctx == nullptr && try_parsing_type) { 3694 Type *type = die.GetDWARF()->ResolveType(die); 3695 if (type) 3696 decl_ctx = GetCachedClangDeclContextForDIE(die); 3697 } 3698 3699 if (decl_ctx) { 3700 LinkDeclContextToDIE(decl_ctx, die); 3701 return decl_ctx; 3702 } 3703 } 3704 return nullptr; 3705} 3706 3707clang::BlockDecl *DWARFASTParserClang::ResolveBlockDIE(const DWARFDIE &die) { 3708 if (die && die.Tag() == DW_TAG_lexical_block) { 3709 clang::BlockDecl *decl = 3710 llvm::cast_or_null<clang::BlockDecl>(m_die_to_decl_ctx[die.GetDIE()]); 3711 3712 if (!decl) { 3713 DWARFDIE decl_context_die; 3714 clang::DeclContext *decl_context = 3715 GetClangDeclContextContainingDIE(die, &decl_context_die); 3716 decl = m_ast.CreateBlockDeclaration(decl_context); 3717 3718 if (decl) 3719 LinkDeclContextToDIE((clang::DeclContext *)decl, die); 3720 } 3721 3722 return decl; 3723 } 3724 return nullptr; 3725} 3726 3727clang::NamespaceDecl * 3728DWARFASTParserClang::ResolveNamespaceDIE(const DWARFDIE &die) { 3729 if (die && die.Tag() == DW_TAG_namespace) { 3730 // See if we already parsed this namespace DIE and associated it with a 3731 // uniqued namespace declaration 3732 clang::NamespaceDecl *namespace_decl = 3733 static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die.GetDIE()]); 3734 if (namespace_decl) 3735 return namespace_decl; 3736 else { 3737 const char *namespace_name = die.GetName(); 3738 clang::DeclContext *containing_decl_ctx = 3739 GetClangDeclContextContainingDIE(die, nullptr); 3740 namespace_decl = m_ast.GetUniqueNamespaceDeclaration(namespace_name, 3741 containing_decl_ctx); 3742 Log *log = 3743 nullptr; // (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 3744 if (log) { 3745 SymbolFileDWARF *dwarf = die.GetDWARF(); 3746 if (namespace_name) { 3747 dwarf->GetObjectFile()->GetModule()->LogMessage( 3748 log, "ASTContext => %p: 0x%8.8" PRIx64 3749 ": DW_TAG_namespace with DW_AT_name(\"%s\") => " 3750 "clang::NamespaceDecl *%p (original = %p)", 3751 static_cast<void *>(m_ast.getASTContext()), die.GetID(), 3752 namespace_name, static_cast<void *>(namespace_decl), 3753 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3754 } else { 3755 dwarf->GetObjectFile()->GetModule()->LogMessage( 3756 log, "ASTContext => %p: 0x%8.8" PRIx64 3757 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p " 3758 "(original = %p)", 3759 static_cast<void *>(m_ast.getASTContext()), die.GetID(), 3760 static_cast<void *>(namespace_decl), 3761 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3762 } 3763 } 3764 3765 if (namespace_decl) 3766 LinkDeclContextToDIE((clang::DeclContext *)namespace_decl, die); 3767 return namespace_decl; 3768 } 3769 } 3770 return nullptr; 3771} 3772 3773clang::DeclContext *DWARFASTParserClang::GetClangDeclContextContainingDIE( 3774 const DWARFDIE &die, DWARFDIE *decl_ctx_die_copy) { 3775 SymbolFileDWARF *dwarf = die.GetDWARF(); 3776 3777 DWARFDIE decl_ctx_die = dwarf->GetDeclContextDIEContainingDIE(die); 3778 3779 if (decl_ctx_die_copy) 3780 *decl_ctx_die_copy = decl_ctx_die; 3781 3782 if (decl_ctx_die) { 3783 clang::DeclContext *clang_decl_ctx = 3784 GetClangDeclContextForDIE(decl_ctx_die); 3785 if (clang_decl_ctx) 3786 return clang_decl_ctx; 3787 } 3788 return m_ast.GetTranslationUnitDecl(); 3789} 3790 3791clang::DeclContext * 3792DWARFASTParserClang::GetCachedClangDeclContextForDIE(const DWARFDIE &die) { 3793 if (die) { 3794 DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find(die.GetDIE()); 3795 if (pos != m_die_to_decl_ctx.end()) 3796 return pos->second; 3797 } 3798 return nullptr; 3799} 3800 3801void DWARFASTParserClang::LinkDeclContextToDIE(clang::DeclContext *decl_ctx, 3802 const DWARFDIE &die) { 3803 m_die_to_decl_ctx[die.GetDIE()] = decl_ctx; 3804 // There can be many DIEs for a single decl context 3805 // m_decl_ctx_to_die[decl_ctx].insert(die.GetDIE()); 3806 m_decl_ctx_to_die.insert(std::make_pair(decl_ctx, die)); 3807} 3808 3809bool DWARFASTParserClang::CopyUniqueClassMethodTypes( 3810 const DWARFDIE &src_class_die, const DWARFDIE &dst_class_die, 3811 lldb_private::Type *class_type, DWARFDIECollection &failures) { 3812 if (!class_type || !src_class_die || !dst_class_die) 3813 return false; 3814 if (src_class_die.Tag() != dst_class_die.Tag()) 3815 return false; 3816 3817 // We need to complete the class type so we can get all of the method types 3818 // parsed so we can then unique those types to their equivalent counterparts 3819 // in "dst_cu" and "dst_class_die" 3820 class_type->GetFullCompilerType(); 3821 3822 DWARFDIE src_die; 3823 DWARFDIE dst_die; 3824 UniqueCStringMap<DWARFDIE> src_name_to_die; 3825 UniqueCStringMap<DWARFDIE> dst_name_to_die; 3826 UniqueCStringMap<DWARFDIE> src_name_to_die_artificial; 3827 UniqueCStringMap<DWARFDIE> dst_name_to_die_artificial; 3828 for (src_die = src_class_die.GetFirstChild(); src_die.IsValid(); 3829 src_die = src_die.GetSibling()) { 3830 if (src_die.Tag() == DW_TAG_subprogram) { 3831 // Make sure this is a declaration and not a concrete instance by looking 3832 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3833 // are placed inside the class definitions and shouldn't be included in 3834 // the list of things are are tracking here. 3835 if (src_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 3836 const char *src_name = src_die.GetMangledName(); 3837 if (src_name) { 3838 ConstString src_const_name(src_name); 3839 if (src_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3840 src_name_to_die_artificial.Append(src_const_name.GetStringRef(), 3841 src_die); 3842 else 3843 src_name_to_die.Append(src_const_name.GetStringRef(), src_die); 3844 } 3845 } 3846 } 3847 } 3848 for (dst_die = dst_class_die.GetFirstChild(); dst_die.IsValid(); 3849 dst_die = dst_die.GetSibling()) { 3850 if (dst_die.Tag() == DW_TAG_subprogram) { 3851 // Make sure this is a declaration and not a concrete instance by looking 3852 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3853 // are placed inside the class definitions and shouldn't be included in 3854 // the list of things are are tracking here. 3855 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 3856 const char *dst_name = dst_die.GetMangledName(); 3857 if (dst_name) { 3858 ConstString dst_const_name(dst_name); 3859 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3860 dst_name_to_die_artificial.Append(dst_const_name.GetStringRef(), 3861 dst_die); 3862 else 3863 dst_name_to_die.Append(dst_const_name.GetStringRef(), dst_die); 3864 } 3865 } 3866 } 3867 } 3868 const uint32_t src_size = src_name_to_die.GetSize(); 3869 const uint32_t dst_size = dst_name_to_die.GetSize(); 3870 Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | 3871 // DWARF_LOG_TYPE_COMPLETION)); 3872 3873 // Is everything kosher so we can go through the members at top speed? 3874 bool fast_path = true; 3875 3876 if (src_size != dst_size) { 3877 if (src_size != 0 && dst_size != 0) { 3878 if (log) 3879 log->Printf("warning: trying to unique class DIE 0x%8.8x to 0x%8.8x, " 3880 "but they didn't have the same size (src=%d, dst=%d)", 3881 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3882 src_size, dst_size); 3883 } 3884 3885 fast_path = false; 3886 } 3887 3888 uint32_t idx; 3889 3890 if (fast_path) { 3891 for (idx = 0; idx < src_size; ++idx) { 3892 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 3893 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3894 3895 if (src_die.Tag() != dst_die.Tag()) { 3896 if (log) 3897 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 3898 "but 0x%8.8x (%s) tags didn't match 0x%8.8x (%s)", 3899 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3900 src_die.GetOffset(), src_die.GetTagAsCString(), 3901 dst_die.GetOffset(), dst_die.GetTagAsCString()); 3902 fast_path = false; 3903 } 3904 3905 const char *src_name = src_die.GetMangledName(); 3906 const char *dst_name = dst_die.GetMangledName(); 3907 3908 // Make sure the names match 3909 if (src_name == dst_name || (strcmp(src_name, dst_name) == 0)) 3910 continue; 3911 3912 if (log) 3913 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 3914 "but 0x%8.8x (%s) names didn't match 0x%8.8x (%s)", 3915 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3916 src_die.GetOffset(), src_name, dst_die.GetOffset(), 3917 dst_name); 3918 3919 fast_path = false; 3920 } 3921 } 3922 3923 DWARFASTParserClang *src_dwarf_ast_parser = 3924 (DWARFASTParserClang *)src_die.GetDWARFParser(); 3925 DWARFASTParserClang *dst_dwarf_ast_parser = 3926 (DWARFASTParserClang *)dst_die.GetDWARFParser(); 3927 3928 // Now do the work of linking the DeclContexts and Types. 3929 if (fast_path) { 3930 // We can do this quickly. Just run across the tables index-for-index since 3931 // we know each node has matching names and tags. 3932 for (idx = 0; idx < src_size; ++idx) { 3933 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 3934 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3935 3936 clang::DeclContext *src_decl_ctx = 3937 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3938 if (src_decl_ctx) { 3939 if (log) 3940 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3941 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 3942 dst_die.GetOffset()); 3943 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 3944 } else { 3945 if (log) 3946 log->Printf("warning: tried to unique decl context from 0x%8.8x for " 3947 "0x%8.8x, but none was found", 3948 src_die.GetOffset(), dst_die.GetOffset()); 3949 } 3950 3951 Type *src_child_type = 3952 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3953 if (src_child_type) { 3954 if (log) 3955 log->Printf( 3956 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 3957 static_cast<void *>(src_child_type), src_child_type->GetID(), 3958 src_die.GetOffset(), dst_die.GetOffset()); 3959 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 3960 } else { 3961 if (log) 3962 log->Printf("warning: tried to unique lldb_private::Type from " 3963 "0x%8.8x for 0x%8.8x, but none was found", 3964 src_die.GetOffset(), dst_die.GetOffset()); 3965 } 3966 } 3967 } else { 3968 // We must do this slowly. For each member of the destination, look 3969 // up a member in the source with the same name, check its tag, and 3970 // unique them if everything matches up. Report failures. 3971 3972 if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty()) { 3973 src_name_to_die.Sort(); 3974 3975 for (idx = 0; idx < dst_size; ++idx) { 3976 llvm::StringRef dst_name = dst_name_to_die.GetCStringAtIndex(idx); 3977 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3978 src_die = src_name_to_die.Find(dst_name, DWARFDIE()); 3979 3980 if (src_die && (src_die.Tag() == dst_die.Tag())) { 3981 clang::DeclContext *src_decl_ctx = 3982 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 3983 if (src_decl_ctx) { 3984 if (log) 3985 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 3986 static_cast<void *>(src_decl_ctx), 3987 src_die.GetOffset(), dst_die.GetOffset()); 3988 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 3989 } else { 3990 if (log) 3991 log->Printf("warning: tried to unique decl context from 0x%8.8x " 3992 "for 0x%8.8x, but none was found", 3993 src_die.GetOffset(), dst_die.GetOffset()); 3994 } 3995 3996 Type *src_child_type = 3997 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 3998 if (src_child_type) { 3999 if (log) 4000 log->Printf("uniquing type %p (uid=0x%" PRIx64 4001 ") from 0x%8.8x for 0x%8.8x", 4002 static_cast<void *>(src_child_type), 4003 src_child_type->GetID(), src_die.GetOffset(), 4004 dst_die.GetOffset()); 4005 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = 4006 src_child_type; 4007 } else { 4008 if (log) 4009 log->Printf("warning: tried to unique lldb_private::Type from " 4010 "0x%8.8x for 0x%8.8x, but none was found", 4011 src_die.GetOffset(), dst_die.GetOffset()); 4012 } 4013 } else { 4014 if (log) 4015 log->Printf("warning: couldn't find a match for 0x%8.8x", 4016 dst_die.GetOffset()); 4017 4018 failures.Append(dst_die); 4019 } 4020 } 4021 } 4022 } 4023 4024 const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize(); 4025 const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize(); 4026 4027 if (src_size_artificial && dst_size_artificial) { 4028 dst_name_to_die_artificial.Sort(); 4029 4030 for (idx = 0; idx < src_size_artificial; ++idx) { 4031 llvm::StringRef src_name_artificial = 4032 src_name_to_die_artificial.GetCStringAtIndex(idx); 4033 src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 4034 dst_die = 4035 dst_name_to_die_artificial.Find(src_name_artificial, DWARFDIE()); 4036 4037 if (dst_die) { 4038 // Both classes have the artificial types, link them 4039 clang::DeclContext *src_decl_ctx = 4040 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4041 if (src_decl_ctx) { 4042 if (log) 4043 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4044 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 4045 dst_die.GetOffset()); 4046 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 4047 } else { 4048 if (log) 4049 log->Printf("warning: tried to unique decl context from 0x%8.8x " 4050 "for 0x%8.8x, but none was found", 4051 src_die.GetOffset(), dst_die.GetOffset()); 4052 } 4053 4054 Type *src_child_type = 4055 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4056 if (src_child_type) { 4057 if (log) 4058 log->Printf( 4059 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 4060 static_cast<void *>(src_child_type), src_child_type->GetID(), 4061 src_die.GetOffset(), dst_die.GetOffset()); 4062 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 4063 } else { 4064 if (log) 4065 log->Printf("warning: tried to unique lldb_private::Type from " 4066 "0x%8.8x for 0x%8.8x, but none was found", 4067 src_die.GetOffset(), dst_die.GetOffset()); 4068 } 4069 } 4070 } 4071 } 4072 4073 if (dst_size_artificial) { 4074 for (idx = 0; idx < dst_size_artificial; ++idx) { 4075 llvm::StringRef dst_name_artificial = 4076 dst_name_to_die_artificial.GetCStringAtIndex(idx); 4077 dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 4078 if (log) 4079 log->Printf("warning: need to create artificial method for 0x%8.8x for " 4080 "method '%s'", 4081 dst_die.GetOffset(), dst_name_artificial.str().c_str()); 4082 4083 failures.Append(dst_die); 4084 } 4085 } 4086 4087 return (failures.Size() != 0); 4088} 4089