DWARFASTParserClang.cpp revision 327952
1//===-- DWARFASTParserClang.cpp ---------------------------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10#include <stdlib.h> 11 12#include "DWARFASTParserClang.h" 13#include "DWARFCompileUnit.h" 14#include "DWARFDIE.h" 15#include "DWARFDIECollection.h" 16#include "DWARFDebugInfo.h" 17#include "DWARFDeclContext.h" 18#include "DWARFDefines.h" 19#include "SymbolFileDWARF.h" 20#include "SymbolFileDWARFDebugMap.h" 21#include "UniqueDWARFASTType.h" 22 23#include "Plugins/Language/ObjC/ObjCLanguage.h" 24#include "lldb/Core/Module.h" 25#include "lldb/Core/Value.h" 26#include "lldb/Host/Host.h" 27#include "lldb/Interpreter/Args.h" 28#include "lldb/Symbol/ClangASTImporter.h" 29#include "lldb/Symbol/ClangExternalASTSourceCommon.h" 30#include "lldb/Symbol/ClangUtil.h" 31#include "lldb/Symbol/CompileUnit.h" 32#include "lldb/Symbol/Function.h" 33#include "lldb/Symbol/ObjectFile.h" 34#include "lldb/Symbol/SymbolVendor.h" 35#include "lldb/Symbol/TypeList.h" 36#include "lldb/Symbol/TypeMap.h" 37#include "lldb/Target/Language.h" 38#include "lldb/Utility/LLDBAssert.h" 39#include "lldb/Utility/Log.h" 40#include "lldb/Utility/StreamString.h" 41 42#include "clang/AST/DeclCXX.h" 43#include "clang/AST/DeclObjC.h" 44 45#include <map> 46#include <vector> 47 48//#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN 49 50#ifdef ENABLE_DEBUG_PRINTF 51#include <stdio.h> 52#define DEBUG_PRINTF(fmt, ...) printf(fmt, __VA_ARGS__) 53#else 54#define DEBUG_PRINTF(fmt, ...) 55#endif 56 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 if (!class_template_decl) { 790 if (log) { 791 dwarf->GetObjectFile()->GetModule()->LogMessage( 792 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" " 793 "clang::ClassTemplateDecl failed to return a decl.", 794 static_cast<void *>(this), die.GetOffset(), 795 DW_TAG_value_to_name(tag), type_name_cstr); 796 } 797 return TypeSP(); 798 } 799 800 clang::ClassTemplateSpecializationDecl 801 *class_specialization_decl = 802 m_ast.CreateClassTemplateSpecializationDecl( 803 decl_ctx, class_template_decl, tag_decl_kind, 804 template_param_infos); 805 clang_type = m_ast.CreateClassTemplateSpecializationType( 806 class_specialization_decl); 807 clang_type_was_created = true; 808 809 m_ast.SetMetadata(class_template_decl, metadata); 810 m_ast.SetMetadata(class_specialization_decl, metadata); 811 } 812 } 813 814 if (!clang_type_was_created) { 815 clang_type_was_created = true; 816 clang_type = m_ast.CreateRecordType(decl_ctx, accessibility, 817 type_name_cstr, tag_decl_kind, 818 class_language, &metadata); 819 } 820 } 821 822 // Store a forward declaration to this class type in case any 823 // parameters in any class methods need it for the clang 824 // types for function prototypes. 825 LinkDeclContextToDIE(m_ast.GetDeclContextForType(clang_type), die); 826 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, 827 byte_size, NULL, LLDB_INVALID_UID, 828 Type::eEncodingIsUID, &decl, clang_type, 829 Type::eResolveStateForward)); 830 831 type_sp->SetIsCompleteObjCClass(is_complete_objc_class); 832 833 // Add our type to the unique type map so we don't 834 // end up creating many copies of the same type over 835 // and over in the ASTContext for our module 836 unique_ast_entry_ap->m_type_sp = type_sp; 837 unique_ast_entry_ap->m_die = die; 838 unique_ast_entry_ap->m_declaration = unique_decl; 839 unique_ast_entry_ap->m_byte_size = byte_size; 840 dwarf->GetUniqueDWARFASTTypeMap().Insert(unique_typename, 841 *unique_ast_entry_ap); 842 843 if (is_forward_declaration && die.HasChildren()) { 844 // Check to see if the DIE actually has a definition, some version of 845 // GCC will 846 // emit DIEs with DW_AT_declaration set to true, but yet still have 847 // subprogram, 848 // members, or inheritance, so we can't trust it 849 DWARFDIE child_die = die.GetFirstChild(); 850 while (child_die) { 851 switch (child_die.Tag()) { 852 case DW_TAG_inheritance: 853 case DW_TAG_subprogram: 854 case DW_TAG_member: 855 case DW_TAG_APPLE_property: 856 case DW_TAG_class_type: 857 case DW_TAG_structure_type: 858 case DW_TAG_enumeration_type: 859 case DW_TAG_typedef: 860 case DW_TAG_union_type: 861 child_die.Clear(); 862 is_forward_declaration = false; 863 break; 864 default: 865 child_die = child_die.GetSibling(); 866 break; 867 } 868 } 869 } 870 871 if (!is_forward_declaration) { 872 // Always start the definition for a class type so that 873 // if the class has child classes or types that require 874 // the class to be created for use as their decl contexts 875 // the class will be ready to accept these child definitions. 876 if (die.HasChildren() == false) { 877 // No children for this struct/union/class, lets finish it 878 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 879 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 880 } else { 881 dwarf->GetObjectFile()->GetModule()->ReportError( 882 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 883 "definition.\nPlease file a bug and attach the file at the " 884 "start of this error message", 885 die.GetOffset(), type_name_cstr); 886 } 887 888 if (tag == DW_TAG_structure_type) // this only applies in C 889 { 890 clang::RecordDecl *record_decl = 891 ClangASTContext::GetAsRecordDecl(clang_type); 892 893 if (record_decl) { 894 GetClangASTImporter().InsertRecordDecl( 895 record_decl, ClangASTImporter::LayoutInfo()); 896 } 897 } 898 } else if (clang_type_was_created) { 899 // Start the definition if the class is not objective C since 900 // the underlying decls respond to isCompleteDefinition(). Objective 901 // C decls don't respond to isCompleteDefinition() so we can't 902 // start the declaration definition right away. For C++ 903 // class/union/structs 904 // we want to start the definition in case the class is needed as 905 // the 906 // declaration context for a contained class or type without the 907 // need 908 // to complete that type.. 909 910 if (class_language != eLanguageTypeObjC && 911 class_language != eLanguageTypeObjC_plus_plus) 912 ClangASTContext::StartTagDeclarationDefinition(clang_type); 913 914 // Leave this as a forward declaration until we need 915 // to know the details of the type. lldb_private::Type 916 // will automatically call the SymbolFile virtual function 917 // "SymbolFileDWARF::CompleteType(Type *)" 918 // When the definition needs to be defined. 919 assert(!dwarf->GetForwardDeclClangTypeToDie().count( 920 ClangUtil::RemoveFastQualifiers(clang_type) 921 .GetOpaqueQualType()) && 922 "Type already in the forward declaration map!"); 923 // Can't assume m_ast.GetSymbolFile() is actually a SymbolFileDWARF, 924 // it can be a 925 // SymbolFileDWARFDebugMap for Apple binaries. 926 dwarf->GetForwardDeclDieToClangType()[die.GetDIE()] = 927 clang_type.GetOpaqueQualType(); 928 dwarf->GetForwardDeclClangTypeToDie() 929 [ClangUtil::RemoveFastQualifiers(clang_type) 930 .GetOpaqueQualType()] = die.GetDIERef(); 931 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), true); 932 } 933 } 934 } break; 935 936 case DW_TAG_enumeration_type: { 937 // Set a bit that lets us know that we are currently parsing this 938 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 939 940 bool is_scoped = false; 941 DWARFFormValue encoding_form; 942 943 const size_t num_attributes = die.GetAttributes(attributes); 944 if (num_attributes > 0) { 945 uint32_t i; 946 947 for (i = 0; i < num_attributes; ++i) { 948 attr = attributes.AttributeAtIndex(i); 949 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 950 switch (attr) { 951 case DW_AT_decl_file: 952 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 953 form_value.Unsigned())); 954 break; 955 case DW_AT_decl_line: 956 decl.SetLine(form_value.Unsigned()); 957 break; 958 case DW_AT_decl_column: 959 decl.SetColumn(form_value.Unsigned()); 960 break; 961 case DW_AT_name: 962 type_name_cstr = form_value.AsCString(); 963 type_name_const_str.SetCString(type_name_cstr); 964 break; 965 case DW_AT_type: 966 encoding_form = form_value; 967 break; 968 case DW_AT_byte_size: 969 byte_size = form_value.Unsigned(); 970 break; 971 case DW_AT_accessibility: 972 break; // accessibility = 973 // DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 974 case DW_AT_declaration: 975 is_forward_declaration = form_value.Boolean(); 976 break; 977 case DW_AT_enum_class: 978 is_scoped = form_value.Boolean(); 979 break; 980 case DW_AT_allocated: 981 case DW_AT_associated: 982 case DW_AT_bit_stride: 983 case DW_AT_byte_stride: 984 case DW_AT_data_location: 985 case DW_AT_description: 986 case DW_AT_start_scope: 987 case DW_AT_visibility: 988 case DW_AT_specification: 989 case DW_AT_abstract_origin: 990 case DW_AT_sibling: 991 break; 992 } 993 } 994 } 995 996 if (is_forward_declaration) { 997 type_sp = ParseTypeFromDWO(die, log); 998 if (type_sp) 999 return type_sp; 1000 1001 DWARFDeclContext die_decl_ctx; 1002 die.GetDWARFDeclContext(die_decl_ctx); 1003 1004 type_sp = 1005 dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx); 1006 1007 if (!type_sp) { 1008 SymbolFileDWARFDebugMap *debug_map_symfile = 1009 dwarf->GetDebugMapSymfile(); 1010 if (debug_map_symfile) { 1011 // We weren't able to find a full declaration in 1012 // this DWARF, see if we have a declaration anywhere 1013 // else... 1014 type_sp = 1015 debug_map_symfile->FindDefinitionTypeForDWARFDeclContext( 1016 die_decl_ctx); 1017 } 1018 } 1019 1020 if (type_sp) { 1021 if (log) { 1022 dwarf->GetObjectFile()->GetModule()->LogMessage( 1023 log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 1024 "forward declaration, complete type is 0x%8.8" PRIx64, 1025 static_cast<void *>(this), die.GetOffset(), 1026 DW_TAG_value_to_name(tag), type_name_cstr, 1027 type_sp->GetID()); 1028 } 1029 1030 // We found a real definition for this type elsewhere 1031 // so lets use it and cache the fact that we found 1032 // a complete type for this die 1033 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1034 clang::DeclContext *defn_decl_ctx = 1035 GetCachedClangDeclContextForDIE(dwarf->DebugInfo()->GetDIE( 1036 DIERef(type_sp->GetID(), dwarf))); 1037 if (defn_decl_ctx) 1038 LinkDeclContextToDIE(defn_decl_ctx, die); 1039 return type_sp; 1040 } 1041 } 1042 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1043 DW_TAG_value_to_name(tag), type_name_cstr); 1044 1045 CompilerType enumerator_clang_type; 1046 clang_type.SetCompilerType( 1047 &m_ast, 1048 dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE())); 1049 if (!clang_type) { 1050 if (encoding_form.IsValid()) { 1051 Type *enumerator_type = 1052 dwarf->ResolveTypeUID(DIERef(encoding_form)); 1053 if (enumerator_type) 1054 enumerator_clang_type = enumerator_type->GetFullCompilerType(); 1055 } 1056 1057 if (!enumerator_clang_type) { 1058 if (byte_size > 0) { 1059 enumerator_clang_type = 1060 m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize( 1061 NULL, DW_ATE_signed, byte_size * 8); 1062 } else { 1063 enumerator_clang_type = m_ast.GetBasicType(eBasicTypeInt); 1064 } 1065 } 1066 1067 clang_type = m_ast.CreateEnumerationType( 1068 type_name_cstr, GetClangDeclContextContainingDIE(die, nullptr), 1069 decl, enumerator_clang_type, is_scoped); 1070 } else { 1071 enumerator_clang_type = 1072 m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType()); 1073 } 1074 1075 LinkDeclContextToDIE( 1076 ClangASTContext::GetDeclContextForType(clang_type), die); 1077 1078 type_sp.reset(new Type( 1079 die.GetID(), dwarf, type_name_const_str, byte_size, NULL, 1080 DIERef(encoding_form).GetUID(dwarf), Type::eEncodingIsUID, &decl, 1081 clang_type, Type::eResolveStateForward)); 1082 1083 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 1084 if (die.HasChildren()) { 1085 SymbolContext cu_sc(die.GetLLDBCompileUnit()); 1086 bool is_signed = false; 1087 enumerator_clang_type.IsIntegerType(is_signed); 1088 ParseChildEnumerators(cu_sc, clang_type, is_signed, 1089 type_sp->GetByteSize(), die); 1090 } 1091 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 1092 } else { 1093 dwarf->GetObjectFile()->GetModule()->ReportError( 1094 "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 1095 "definition.\nPlease file a bug and attach the file at the " 1096 "start of this error message", 1097 die.GetOffset(), type_name_cstr); 1098 } 1099 } 1100 } break; 1101 1102 case DW_TAG_inlined_subroutine: 1103 case DW_TAG_subprogram: 1104 case DW_TAG_subroutine_type: { 1105 // Set a bit that lets us know that we are currently parsing this 1106 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1107 1108 DWARFFormValue type_die_form; 1109 bool is_variadic = false; 1110 bool is_inline = false; 1111 bool is_static = false; 1112 bool is_virtual = false; 1113 bool is_explicit = false; 1114 bool is_artificial = false; 1115 bool has_template_params = false; 1116 DWARFFormValue specification_die_form; 1117 DWARFFormValue abstract_origin_die_form; 1118 dw_offset_t object_pointer_die_offset = DW_INVALID_OFFSET; 1119 1120 unsigned type_quals = 0; 1121 clang::StorageClass storage = 1122 clang::SC_None; //, Extern, Static, PrivateExtern 1123 1124 const size_t num_attributes = die.GetAttributes(attributes); 1125 if (num_attributes > 0) { 1126 uint32_t i; 1127 for (i = 0; i < num_attributes; ++i) { 1128 attr = attributes.AttributeAtIndex(i); 1129 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1130 switch (attr) { 1131 case DW_AT_decl_file: 1132 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 1133 form_value.Unsigned())); 1134 break; 1135 case DW_AT_decl_line: 1136 decl.SetLine(form_value.Unsigned()); 1137 break; 1138 case DW_AT_decl_column: 1139 decl.SetColumn(form_value.Unsigned()); 1140 break; 1141 case DW_AT_name: 1142 type_name_cstr = form_value.AsCString(); 1143 type_name_const_str.SetCString(type_name_cstr); 1144 break; 1145 1146 case DW_AT_linkage_name: 1147 case DW_AT_MIPS_linkage_name: 1148 break; // mangled = 1149 // form_value.AsCString(&dwarf->get_debug_str_data()); 1150 // break; 1151 case DW_AT_type: 1152 type_die_form = form_value; 1153 break; 1154 case DW_AT_accessibility: 1155 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 1156 break; 1157 case DW_AT_declaration: 1158 break; // is_forward_declaration = form_value.Boolean(); break; 1159 case DW_AT_inline: 1160 is_inline = form_value.Boolean(); 1161 break; 1162 case DW_AT_virtuality: 1163 is_virtual = form_value.Boolean(); 1164 break; 1165 case DW_AT_explicit: 1166 is_explicit = form_value.Boolean(); 1167 break; 1168 case DW_AT_artificial: 1169 is_artificial = form_value.Boolean(); 1170 break; 1171 1172 case DW_AT_external: 1173 if (form_value.Unsigned()) { 1174 if (storage == clang::SC_None) 1175 storage = clang::SC_Extern; 1176 else 1177 storage = clang::SC_PrivateExtern; 1178 } 1179 break; 1180 1181 case DW_AT_specification: 1182 specification_die_form = form_value; 1183 break; 1184 1185 case DW_AT_abstract_origin: 1186 abstract_origin_die_form = form_value; 1187 break; 1188 1189 case DW_AT_object_pointer: 1190 object_pointer_die_offset = form_value.Reference(); 1191 break; 1192 1193 case DW_AT_allocated: 1194 case DW_AT_associated: 1195 case DW_AT_address_class: 1196 case DW_AT_calling_convention: 1197 case DW_AT_data_location: 1198 case DW_AT_elemental: 1199 case DW_AT_entry_pc: 1200 case DW_AT_frame_base: 1201 case DW_AT_high_pc: 1202 case DW_AT_low_pc: 1203 case DW_AT_prototyped: 1204 case DW_AT_pure: 1205 case DW_AT_ranges: 1206 case DW_AT_recursive: 1207 case DW_AT_return_addr: 1208 case DW_AT_segment: 1209 case DW_AT_start_scope: 1210 case DW_AT_static_link: 1211 case DW_AT_trampoline: 1212 case DW_AT_visibility: 1213 case DW_AT_vtable_elem_location: 1214 case DW_AT_description: 1215 case DW_AT_sibling: 1216 break; 1217 } 1218 } 1219 } 1220 } 1221 1222 std::string object_pointer_name; 1223 if (object_pointer_die_offset != DW_INVALID_OFFSET) { 1224 DWARFDIE object_pointer_die = die.GetDIE(object_pointer_die_offset); 1225 if (object_pointer_die) { 1226 const char *object_pointer_name_cstr = object_pointer_die.GetName(); 1227 if (object_pointer_name_cstr) 1228 object_pointer_name = object_pointer_name_cstr; 1229 } 1230 } 1231 1232 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1233 DW_TAG_value_to_name(tag), type_name_cstr); 1234 1235 CompilerType return_clang_type; 1236 Type *func_type = NULL; 1237 1238 if (type_die_form.IsValid()) 1239 func_type = dwarf->ResolveTypeUID(DIERef(type_die_form)); 1240 1241 if (func_type) 1242 return_clang_type = func_type->GetForwardCompilerType(); 1243 else 1244 return_clang_type = m_ast.GetBasicType(eBasicTypeVoid); 1245 1246 std::vector<CompilerType> function_param_types; 1247 std::vector<clang::ParmVarDecl *> function_param_decls; 1248 1249 // Parse the function children for the parameters 1250 1251 DWARFDIE decl_ctx_die; 1252 clang::DeclContext *containing_decl_ctx = 1253 GetClangDeclContextContainingDIE(die, &decl_ctx_die); 1254 const clang::Decl::Kind containing_decl_kind = 1255 containing_decl_ctx->getDeclKind(); 1256 1257 bool is_cxx_method = DeclKindIsCXXClass(containing_decl_kind); 1258 // Start off static. This will be set to false in 1259 // ParseChildParameters(...) 1260 // if we find a "this" parameters as the first parameter 1261 if (is_cxx_method) { 1262 is_static = true; 1263 } 1264 1265 if (die.HasChildren()) { 1266 bool skip_artificial = true; 1267 ParseChildParameters(sc, containing_decl_ctx, die, skip_artificial, 1268 is_static, is_variadic, has_template_params, 1269 function_param_types, function_param_decls, 1270 type_quals); 1271 } 1272 1273 bool ignore_containing_context = false; 1274 // Check for templatized class member functions. If we had any 1275 // DW_TAG_template_type_parameter 1276 // or DW_TAG_template_value_parameter the DW_TAG_subprogram DIE, then we 1277 // can't let this become 1278 // a method in a class. Why? Because templatized functions are only 1279 // emitted if one of the 1280 // templatized methods is used in the current compile unit and we will 1281 // end up with classes 1282 // that may or may not include these member functions and this means one 1283 // class won't match another 1284 // class definition and it affects our ability to use a class in the 1285 // clang expression parser. So 1286 // for the greater good, we currently must not allow any template member 1287 // functions in a class definition. 1288 if (is_cxx_method && has_template_params) { 1289 ignore_containing_context = true; 1290 is_cxx_method = false; 1291 } 1292 1293 // clang_type will get the function prototype clang type after this call 1294 clang_type = m_ast.CreateFunctionType( 1295 return_clang_type, function_param_types.data(), 1296 function_param_types.size(), is_variadic, type_quals); 1297 1298 if (type_name_cstr) { 1299 bool type_handled = false; 1300 if (tag == DW_TAG_subprogram || tag == DW_TAG_inlined_subroutine) { 1301 ObjCLanguage::MethodName objc_method(type_name_cstr, true); 1302 if (objc_method.IsValid(true)) { 1303 CompilerType class_opaque_type; 1304 ConstString class_name(objc_method.GetClassName()); 1305 if (class_name) { 1306 TypeSP complete_objc_class_type_sp( 1307 dwarf->FindCompleteObjCDefinitionTypeForDIE( 1308 DWARFDIE(), class_name, false)); 1309 1310 if (complete_objc_class_type_sp) { 1311 CompilerType type_clang_forward_type = 1312 complete_objc_class_type_sp->GetForwardCompilerType(); 1313 if (ClangASTContext::IsObjCObjectOrInterfaceType( 1314 type_clang_forward_type)) 1315 class_opaque_type = type_clang_forward_type; 1316 } 1317 } 1318 1319 if (class_opaque_type) { 1320 // If accessibility isn't set to anything valid, assume public 1321 // for 1322 // now... 1323 if (accessibility == eAccessNone) 1324 accessibility = eAccessPublic; 1325 1326 clang::ObjCMethodDecl *objc_method_decl = 1327 m_ast.AddMethodToObjCObjectType( 1328 class_opaque_type, type_name_cstr, clang_type, 1329 accessibility, is_artificial, is_variadic); 1330 type_handled = objc_method_decl != NULL; 1331 if (type_handled) { 1332 LinkDeclContextToDIE( 1333 ClangASTContext::GetAsDeclContext(objc_method_decl), die); 1334 m_ast.SetMetadataAsUserID(objc_method_decl, die.GetID()); 1335 } else { 1336 dwarf->GetObjectFile()->GetModule()->ReportError( 1337 "{0x%8.8x}: invalid Objective-C method 0x%4.4x (%s), " 1338 "please file a bug and attach the file at the start of " 1339 "this error message", 1340 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 1341 } 1342 } 1343 } else if (is_cxx_method) { 1344 // Look at the parent of this DIE and see if is is 1345 // a class or struct and see if this is actually a 1346 // C++ method 1347 Type *class_type = dwarf->ResolveType(decl_ctx_die); 1348 if (class_type) { 1349 bool alternate_defn = false; 1350 if (class_type->GetID() != decl_ctx_die.GetID() || 1351 decl_ctx_die.GetContainingDWOModuleDIE()) { 1352 alternate_defn = true; 1353 1354 // We uniqued the parent class of this function to another 1355 // class 1356 // so we now need to associate all dies under "decl_ctx_die" 1357 // to 1358 // DIEs in the DIE for "class_type"... 1359 SymbolFileDWARF *class_symfile = NULL; 1360 DWARFDIE class_type_die; 1361 1362 SymbolFileDWARFDebugMap *debug_map_symfile = 1363 dwarf->GetDebugMapSymfile(); 1364 if (debug_map_symfile) { 1365 class_symfile = debug_map_symfile->GetSymbolFileByOSOIndex( 1366 SymbolFileDWARFDebugMap::GetOSOIndexFromUserID( 1367 class_type->GetID())); 1368 class_type_die = class_symfile->DebugInfo()->GetDIE( 1369 DIERef(class_type->GetID(), dwarf)); 1370 } else { 1371 class_symfile = dwarf; 1372 class_type_die = dwarf->DebugInfo()->GetDIE( 1373 DIERef(class_type->GetID(), dwarf)); 1374 } 1375 if (class_type_die) { 1376 DWARFDIECollection failures; 1377 1378 CopyUniqueClassMethodTypes(decl_ctx_die, class_type_die, 1379 class_type, failures); 1380 1381 // FIXME do something with these failures that's smarter 1382 // than 1383 // just dropping them on the ground. Unfortunately classes 1384 // don't 1385 // like having stuff added to them after their definitions 1386 // are 1387 // complete... 1388 1389 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1390 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1391 type_sp = type_ptr->shared_from_this(); 1392 break; 1393 } 1394 } 1395 } 1396 1397 if (specification_die_form.IsValid()) { 1398 // We have a specification which we are going to base our 1399 // function 1400 // prototype off of, so we need this type to be completed so 1401 // that the 1402 // m_die_to_decl_ctx for the method in the specification has a 1403 // valid 1404 // clang decl context. 1405 class_type->GetForwardCompilerType(); 1406 // If we have a specification, then the function type should 1407 // have been 1408 // made with the specification and not with this die. 1409 DWARFDIE spec_die = dwarf->DebugInfo()->GetDIE( 1410 DIERef(specification_die_form)); 1411 clang::DeclContext *spec_clang_decl_ctx = 1412 GetClangDeclContextForDIE(spec_die); 1413 if (spec_clang_decl_ctx) { 1414 LinkDeclContextToDIE(spec_clang_decl_ctx, die); 1415 } else { 1416 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1417 "0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8" PRIx64 1418 ") has no decl\n", 1419 die.GetID(), specification_die_form.Reference()); 1420 } 1421 type_handled = true; 1422 } else if (abstract_origin_die_form.IsValid()) { 1423 // We have a specification which we are going to base our 1424 // function 1425 // prototype off of, so we need this type to be completed so 1426 // that the 1427 // m_die_to_decl_ctx for the method in the abstract origin has 1428 // a valid 1429 // clang decl context. 1430 class_type->GetForwardCompilerType(); 1431 1432 DWARFDIE abs_die = dwarf->DebugInfo()->GetDIE( 1433 DIERef(abstract_origin_die_form)); 1434 clang::DeclContext *abs_clang_decl_ctx = 1435 GetClangDeclContextForDIE(abs_die); 1436 if (abs_clang_decl_ctx) { 1437 LinkDeclContextToDIE(abs_clang_decl_ctx, die); 1438 } else { 1439 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1440 "0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8" PRIx64 1441 ") has no decl\n", 1442 die.GetID(), abstract_origin_die_form.Reference()); 1443 } 1444 type_handled = true; 1445 } else { 1446 CompilerType class_opaque_type = 1447 class_type->GetForwardCompilerType(); 1448 if (ClangASTContext::IsCXXClassType(class_opaque_type)) { 1449 if (class_opaque_type.IsBeingDefined() || alternate_defn) { 1450 if (!is_static && !die.HasChildren()) { 1451 // We have a C++ member function with no children (this 1452 // pointer!) 1453 // and clang will get mad if we try and make a function 1454 // that isn't 1455 // well formed in the DWARF, so we will just skip it... 1456 type_handled = true; 1457 } else { 1458 bool add_method = true; 1459 if (alternate_defn) { 1460 // If an alternate definition for the class exists, 1461 // then add the method only if an 1462 // equivalent is not already present. 1463 clang::CXXRecordDecl *record_decl = 1464 m_ast.GetAsCXXRecordDecl( 1465 class_opaque_type.GetOpaqueQualType()); 1466 if (record_decl) { 1467 for (auto method_iter = record_decl->method_begin(); 1468 method_iter != record_decl->method_end(); 1469 method_iter++) { 1470 clang::CXXMethodDecl *method_decl = *method_iter; 1471 if (method_decl->getNameInfo().getAsString() == 1472 std::string(type_name_cstr)) { 1473 if (method_decl->getType() == 1474 ClangUtil::GetQualType(clang_type)) { 1475 add_method = false; 1476 LinkDeclContextToDIE( 1477 ClangASTContext::GetAsDeclContext( 1478 method_decl), 1479 die); 1480 type_handled = true; 1481 1482 break; 1483 } 1484 } 1485 } 1486 } 1487 } 1488 1489 if (add_method) { 1490 llvm::PrettyStackTraceFormat stack_trace( 1491 "SymbolFileDWARF::ParseType() is adding a method " 1492 "%s to class %s in DIE 0x%8.8" PRIx64 " from %s", 1493 type_name_cstr, 1494 class_type->GetName().GetCString(), die.GetID(), 1495 dwarf->GetObjectFile() 1496 ->GetFileSpec() 1497 .GetPath() 1498 .c_str()); 1499 1500 const bool is_attr_used = false; 1501 // Neither GCC 4.2 nor clang++ currently set a valid 1502 // accessibility 1503 // in the DWARF for C++ methods... Default to public 1504 // for now... 1505 if (accessibility == eAccessNone) 1506 accessibility = eAccessPublic; 1507 1508 clang::CXXMethodDecl *cxx_method_decl = 1509 m_ast.AddMethodToCXXRecordType( 1510 class_opaque_type.GetOpaqueQualType(), 1511 type_name_cstr, clang_type, accessibility, 1512 is_virtual, is_static, is_inline, is_explicit, 1513 is_attr_used, is_artificial); 1514 1515 type_handled = cxx_method_decl != NULL; 1516 1517 if (type_handled) { 1518 LinkDeclContextToDIE( 1519 ClangASTContext::GetAsDeclContext( 1520 cxx_method_decl), 1521 die); 1522 1523 ClangASTMetadata metadata; 1524 metadata.SetUserID(die.GetID()); 1525 1526 if (!object_pointer_name.empty()) { 1527 metadata.SetObjectPtrName( 1528 object_pointer_name.c_str()); 1529 if (log) 1530 log->Printf( 1531 "Setting object pointer name: %s on method " 1532 "object %p.\n", 1533 object_pointer_name.c_str(), 1534 static_cast<void *>(cxx_method_decl)); 1535 } 1536 m_ast.SetMetadata(cxx_method_decl, metadata); 1537 } else { 1538 ignore_containing_context = true; 1539 } 1540 } 1541 } 1542 } else { 1543 // We were asked to parse the type for a method in a 1544 // class, yet the 1545 // class hasn't been asked to complete itself through the 1546 // clang::ExternalASTSource protocol, so we need to just 1547 // have the 1548 // class complete itself and do things the right way, then 1549 // our 1550 // DIE should then have an entry in the 1551 // dwarf->GetDIEToType() map. First 1552 // we need to modify the dwarf->GetDIEToType() so it 1553 // doesn't think we are 1554 // trying to parse this DIE anymore... 1555 dwarf->GetDIEToType()[die.GetDIE()] = NULL; 1556 1557 // Now we get the full type to force our class type to 1558 // complete itself 1559 // using the clang::ExternalASTSource protocol which will 1560 // parse all 1561 // base classes and all methods (including the method for 1562 // this DIE). 1563 class_type->GetFullCompilerType(); 1564 1565 // The type for this DIE should have been filled in the 1566 // function call above 1567 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1568 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1569 type_sp = type_ptr->shared_from_this(); 1570 break; 1571 } 1572 1573 // FIXME This is fixing some even uglier behavior but we 1574 // really need to 1575 // uniq the methods of each class as well as the class 1576 // itself. 1577 // <rdar://problem/11240464> 1578 type_handled = true; 1579 } 1580 } 1581 } 1582 } 1583 } 1584 } 1585 1586 if (!type_handled) { 1587 clang::FunctionDecl *function_decl = nullptr; 1588 1589 if (abstract_origin_die_form.IsValid()) { 1590 DWARFDIE abs_die = 1591 dwarf->DebugInfo()->GetDIE(DIERef(abstract_origin_die_form)); 1592 1593 SymbolContext sc; 1594 1595 if (dwarf->ResolveType(abs_die)) { 1596 function_decl = llvm::dyn_cast_or_null<clang::FunctionDecl>( 1597 GetCachedClangDeclContextForDIE(abs_die)); 1598 1599 if (function_decl) { 1600 LinkDeclContextToDIE(function_decl, die); 1601 } 1602 } 1603 } 1604 1605 if (!function_decl) { 1606 // We just have a function that isn't part of a class 1607 function_decl = m_ast.CreateFunctionDeclaration( 1608 ignore_containing_context ? m_ast.GetTranslationUnitDecl() 1609 : containing_decl_ctx, 1610 type_name_cstr, clang_type, storage, is_inline); 1611 1612 if (has_template_params) { 1613 ClangASTContext::TemplateParameterInfos template_param_infos; 1614 ParseTemplateParameterInfos(die, template_param_infos); 1615 clang::FunctionTemplateDecl *func_template_decl = 1616 m_ast.CreateFunctionTemplateDecl( 1617 containing_decl_ctx, function_decl, type_name_cstr, 1618 template_param_infos); 1619 m_ast.CreateFunctionTemplateSpecializationInfo( 1620 function_decl, func_template_decl, template_param_infos); 1621 } 1622 1623 lldbassert(function_decl); 1624 1625 if (function_decl) { 1626 LinkDeclContextToDIE(function_decl, die); 1627 1628 if (!function_param_decls.empty()) 1629 m_ast.SetFunctionParameters(function_decl, 1630 &function_param_decls.front(), 1631 function_param_decls.size()); 1632 1633 ClangASTMetadata metadata; 1634 metadata.SetUserID(die.GetID()); 1635 1636 if (!object_pointer_name.empty()) { 1637 metadata.SetObjectPtrName(object_pointer_name.c_str()); 1638 if (log) 1639 log->Printf("Setting object pointer name: %s on function " 1640 "object %p.", 1641 object_pointer_name.c_str(), 1642 static_cast<void *>(function_decl)); 1643 } 1644 m_ast.SetMetadata(function_decl, metadata); 1645 } 1646 } 1647 } 1648 } 1649 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, 0, NULL, 1650 LLDB_INVALID_UID, Type::eEncodingIsUID, &decl, 1651 clang_type, Type::eResolveStateFull)); 1652 assert(type_sp.get()); 1653 } break; 1654 1655 case DW_TAG_array_type: { 1656 // Set a bit that lets us know that we are currently parsing this 1657 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1658 1659 DWARFFormValue type_die_form; 1660 int64_t first_index = 0; 1661 uint32_t byte_stride = 0; 1662 uint32_t bit_stride = 0; 1663 bool is_vector = false; 1664 const size_t num_attributes = die.GetAttributes(attributes); 1665 1666 if (num_attributes > 0) { 1667 uint32_t i; 1668 for (i = 0; i < num_attributes; ++i) { 1669 attr = attributes.AttributeAtIndex(i); 1670 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1671 switch (attr) { 1672 case DW_AT_decl_file: 1673 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 1674 form_value.Unsigned())); 1675 break; 1676 case DW_AT_decl_line: 1677 decl.SetLine(form_value.Unsigned()); 1678 break; 1679 case DW_AT_decl_column: 1680 decl.SetColumn(form_value.Unsigned()); 1681 break; 1682 case DW_AT_name: 1683 type_name_cstr = form_value.AsCString(); 1684 type_name_const_str.SetCString(type_name_cstr); 1685 break; 1686 1687 case DW_AT_type: 1688 type_die_form = form_value; 1689 break; 1690 case DW_AT_byte_size: 1691 break; // byte_size = form_value.Unsigned(); break; 1692 case DW_AT_byte_stride: 1693 byte_stride = form_value.Unsigned(); 1694 break; 1695 case DW_AT_bit_stride: 1696 bit_stride = form_value.Unsigned(); 1697 break; 1698 case DW_AT_GNU_vector: 1699 is_vector = form_value.Boolean(); 1700 break; 1701 case DW_AT_accessibility: 1702 break; // accessibility = 1703 // DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 1704 case DW_AT_declaration: 1705 break; // is_forward_declaration = form_value.Boolean(); break; 1706 case DW_AT_allocated: 1707 case DW_AT_associated: 1708 case DW_AT_data_location: 1709 case DW_AT_description: 1710 case DW_AT_ordering: 1711 case DW_AT_start_scope: 1712 case DW_AT_visibility: 1713 case DW_AT_specification: 1714 case DW_AT_abstract_origin: 1715 case DW_AT_sibling: 1716 break; 1717 } 1718 } 1719 } 1720 1721 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1722 DW_TAG_value_to_name(tag), type_name_cstr); 1723 1724 DIERef type_die_ref(type_die_form); 1725 Type *element_type = dwarf->ResolveTypeUID(type_die_ref); 1726 1727 if (element_type) { 1728 std::vector<uint64_t> element_orders; 1729 ParseChildArrayInfo(sc, die, first_index, element_orders, 1730 byte_stride, bit_stride); 1731 if (byte_stride == 0 && bit_stride == 0) 1732 byte_stride = element_type->GetByteSize(); 1733 CompilerType array_element_type = 1734 element_type->GetForwardCompilerType(); 1735 1736 if (ClangASTContext::IsCXXClassType(array_element_type) && 1737 array_element_type.GetCompleteType() == false) { 1738 ModuleSP module_sp = die.GetModule(); 1739 if (module_sp) { 1740 if (die.GetCU()->GetProducer() == 1741 DWARFCompileUnit::eProducerClang) 1742 module_sp->ReportError( 1743 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a " 1744 "class/union/struct element type DIE 0x%8.8x that is a " 1745 "forward declaration, not a complete definition.\nTry " 1746 "compiling the source file with -fstandalone-debug or " 1747 "disable -gmodules", 1748 die.GetOffset(), type_die_ref.die_offset); 1749 else 1750 module_sp->ReportError( 1751 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a " 1752 "class/union/struct element type DIE 0x%8.8x that is a " 1753 "forward declaration, not a complete definition.\nPlease " 1754 "file a bug against the compiler and include the " 1755 "preprocessed output for %s", 1756 die.GetOffset(), type_die_ref.die_offset, 1757 die.GetLLDBCompileUnit() 1758 ? die.GetLLDBCompileUnit()->GetPath().c_str() 1759 : "the source file"); 1760 } 1761 1762 // We have no choice other than to pretend that the element class 1763 // type 1764 // is complete. If we don't do this, clang will crash when trying 1765 // to layout the class. Since we provide layout assistance, all 1766 // ivars in this class and other classes will be fine, this is 1767 // the best we can do short of crashing. 1768 if (ClangASTContext::StartTagDeclarationDefinition( 1769 array_element_type)) { 1770 ClangASTContext::CompleteTagDeclarationDefinition( 1771 array_element_type); 1772 } else { 1773 module_sp->ReportError("DWARF DIE at 0x%8.8x was not able to " 1774 "start its definition.\nPlease file a " 1775 "bug and attach the file at the start " 1776 "of this error message", 1777 type_die_ref.die_offset); 1778 } 1779 } 1780 1781 uint64_t array_element_bit_stride = byte_stride * 8 + bit_stride; 1782 if (element_orders.size() > 0) { 1783 uint64_t num_elements = 0; 1784 std::vector<uint64_t>::const_reverse_iterator pos; 1785 std::vector<uint64_t>::const_reverse_iterator end = 1786 element_orders.rend(); 1787 for (pos = element_orders.rbegin(); pos != end; ++pos) { 1788 num_elements = *pos; 1789 clang_type = m_ast.CreateArrayType(array_element_type, 1790 num_elements, is_vector); 1791 array_element_type = clang_type; 1792 array_element_bit_stride = 1793 num_elements ? array_element_bit_stride * num_elements 1794 : array_element_bit_stride; 1795 } 1796 } else { 1797 clang_type = 1798 m_ast.CreateArrayType(array_element_type, 0, is_vector); 1799 } 1800 ConstString empty_name; 1801 type_sp.reset(new Type( 1802 die.GetID(), dwarf, empty_name, array_element_bit_stride / 8, 1803 NULL, DIERef(type_die_form).GetUID(dwarf), Type::eEncodingIsUID, 1804 &decl, clang_type, Type::eResolveStateFull)); 1805 type_sp->SetEncodingType(element_type); 1806 } 1807 } 1808 } break; 1809 1810 case DW_TAG_ptr_to_member_type: { 1811 DWARFFormValue type_die_form; 1812 DWARFFormValue containing_type_die_form; 1813 1814 const size_t num_attributes = die.GetAttributes(attributes); 1815 1816 if (num_attributes > 0) { 1817 uint32_t i; 1818 for (i = 0; i < num_attributes; ++i) { 1819 attr = attributes.AttributeAtIndex(i); 1820 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1821 switch (attr) { 1822 case DW_AT_type: 1823 type_die_form = form_value; 1824 break; 1825 case DW_AT_containing_type: 1826 containing_type_die_form = form_value; 1827 break; 1828 } 1829 } 1830 } 1831 1832 Type *pointee_type = dwarf->ResolveTypeUID(DIERef(type_die_form)); 1833 Type *class_type = 1834 dwarf->ResolveTypeUID(DIERef(containing_type_die_form)); 1835 1836 CompilerType pointee_clang_type = 1837 pointee_type->GetForwardCompilerType(); 1838 CompilerType class_clang_type = class_type->GetLayoutCompilerType(); 1839 1840 clang_type = ClangASTContext::CreateMemberPointerType( 1841 class_clang_type, pointee_clang_type); 1842 1843 byte_size = clang_type.GetByteSize(nullptr); 1844 1845 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, 1846 byte_size, NULL, LLDB_INVALID_UID, 1847 Type::eEncodingIsUID, NULL, clang_type, 1848 Type::eResolveStateForward)); 1849 } 1850 1851 break; 1852 } 1853 default: 1854 dwarf->GetObjectFile()->GetModule()->ReportError( 1855 "{0x%8.8x}: unhandled type tag 0x%4.4x (%s), please file a bug and " 1856 "attach the file at the start of this error message", 1857 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 1858 break; 1859 } 1860 1861 if (type_sp.get()) { 1862 DWARFDIE sc_parent_die = 1863 SymbolFileDWARF::GetParentSymbolContextDIE(die); 1864 dw_tag_t sc_parent_tag = sc_parent_die.Tag(); 1865 1866 SymbolContextScope *symbol_context_scope = NULL; 1867 if (sc_parent_tag == DW_TAG_compile_unit) { 1868 symbol_context_scope = sc.comp_unit; 1869 } else if (sc.function != NULL && sc_parent_die) { 1870 symbol_context_scope = 1871 sc.function->GetBlock(true).FindBlockByID(sc_parent_die.GetID()); 1872 if (symbol_context_scope == NULL) 1873 symbol_context_scope = sc.function; 1874 } 1875 1876 if (symbol_context_scope != NULL) { 1877 type_sp->SetSymbolContextScope(symbol_context_scope); 1878 } 1879 1880 // We are ready to put this type into the uniqued list up at the module 1881 // level 1882 type_list->Insert(type_sp); 1883 1884 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1885 } 1886 } else if (type_ptr != DIE_IS_BEING_PARSED) { 1887 type_sp = type_ptr->shared_from_this(); 1888 } 1889 } 1890 return type_sp; 1891} 1892 1893// DWARF parsing functions 1894 1895class DWARFASTParserClang::DelayedAddObjCClassProperty { 1896public: 1897 DelayedAddObjCClassProperty( 1898 const CompilerType &class_opaque_type, const char *property_name, 1899 const CompilerType &property_opaque_type, // The property type is only 1900 // required if you don't have an 1901 // ivar decl 1902 clang::ObjCIvarDecl *ivar_decl, const char *property_setter_name, 1903 const char *property_getter_name, uint32_t property_attributes, 1904 const ClangASTMetadata *metadata) 1905 : m_class_opaque_type(class_opaque_type), m_property_name(property_name), 1906 m_property_opaque_type(property_opaque_type), m_ivar_decl(ivar_decl), 1907 m_property_setter_name(property_setter_name), 1908 m_property_getter_name(property_getter_name), 1909 m_property_attributes(property_attributes) { 1910 if (metadata != NULL) { 1911 m_metadata_ap.reset(new ClangASTMetadata()); 1912 *m_metadata_ap = *metadata; 1913 } 1914 } 1915 1916 DelayedAddObjCClassProperty(const DelayedAddObjCClassProperty &rhs) { 1917 *this = rhs; 1918 } 1919 1920 DelayedAddObjCClassProperty & 1921 operator=(const DelayedAddObjCClassProperty &rhs) { 1922 m_class_opaque_type = rhs.m_class_opaque_type; 1923 m_property_name = rhs.m_property_name; 1924 m_property_opaque_type = rhs.m_property_opaque_type; 1925 m_ivar_decl = rhs.m_ivar_decl; 1926 m_property_setter_name = rhs.m_property_setter_name; 1927 m_property_getter_name = rhs.m_property_getter_name; 1928 m_property_attributes = rhs.m_property_attributes; 1929 1930 if (rhs.m_metadata_ap.get()) { 1931 m_metadata_ap.reset(new ClangASTMetadata()); 1932 *m_metadata_ap = *rhs.m_metadata_ap; 1933 } 1934 return *this; 1935 } 1936 1937 bool Finalize() { 1938 return ClangASTContext::AddObjCClassProperty( 1939 m_class_opaque_type, m_property_name, m_property_opaque_type, 1940 m_ivar_decl, m_property_setter_name, m_property_getter_name, 1941 m_property_attributes, m_metadata_ap.get()); 1942 } 1943 1944private: 1945 CompilerType m_class_opaque_type; 1946 const char *m_property_name; 1947 CompilerType m_property_opaque_type; 1948 clang::ObjCIvarDecl *m_ivar_decl; 1949 const char *m_property_setter_name; 1950 const char *m_property_getter_name; 1951 uint32_t m_property_attributes; 1952 std::unique_ptr<ClangASTMetadata> m_metadata_ap; 1953}; 1954 1955bool DWARFASTParserClang::ParseTemplateDIE( 1956 const DWARFDIE &die, 1957 ClangASTContext::TemplateParameterInfos &template_param_infos) { 1958 const dw_tag_t tag = die.Tag(); 1959 1960 switch (tag) { 1961 case DW_TAG_GNU_template_parameter_pack: { 1962 template_param_infos.packed_args.reset( 1963 new ClangASTContext::TemplateParameterInfos); 1964 for (DWARFDIE child_die = die.GetFirstChild(); child_die.IsValid(); 1965 child_die = child_die.GetSibling()) { 1966 if (!ParseTemplateDIE(child_die, *template_param_infos.packed_args)) 1967 return false; 1968 } 1969 if (const char *name = die.GetName()) { 1970 template_param_infos.pack_name = name; 1971 } 1972 return true; 1973 } 1974 case DW_TAG_template_type_parameter: 1975 case DW_TAG_template_value_parameter: { 1976 DWARFAttributes attributes; 1977 const size_t num_attributes = die.GetAttributes(attributes); 1978 const char *name = nullptr; 1979 CompilerType clang_type; 1980 uint64_t uval64 = 0; 1981 bool uval64_valid = false; 1982 if (num_attributes > 0) { 1983 DWARFFormValue form_value; 1984 for (size_t i = 0; i < num_attributes; ++i) { 1985 const dw_attr_t attr = attributes.AttributeAtIndex(i); 1986 1987 switch (attr) { 1988 case DW_AT_name: 1989 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1990 name = form_value.AsCString(); 1991 break; 1992 1993 case DW_AT_type: 1994 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1995 Type *lldb_type = die.ResolveTypeUID(DIERef(form_value)); 1996 if (lldb_type) 1997 clang_type = lldb_type->GetForwardCompilerType(); 1998 } 1999 break; 2000 2001 case DW_AT_const_value: 2002 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2003 uval64_valid = true; 2004 uval64 = form_value.Unsigned(); 2005 } 2006 break; 2007 default: 2008 break; 2009 } 2010 } 2011 2012 clang::ASTContext *ast = m_ast.getASTContext(); 2013 if (!clang_type) 2014 clang_type = m_ast.GetBasicType(eBasicTypeVoid); 2015 2016 if (clang_type) { 2017 bool is_signed = false; 2018 if (name && name[0]) 2019 template_param_infos.names.push_back(name); 2020 else 2021 template_param_infos.names.push_back(NULL); 2022 2023 // Get the signed value for any integer or enumeration if available 2024 clang_type.IsIntegerOrEnumerationType(is_signed); 2025 2026 if (tag == DW_TAG_template_value_parameter && uval64_valid) { 2027 llvm::APInt apint(clang_type.GetBitSize(nullptr), uval64, is_signed); 2028 template_param_infos.args.push_back( 2029 clang::TemplateArgument(*ast, llvm::APSInt(apint, !is_signed), 2030 ClangUtil::GetQualType(clang_type))); 2031 } else { 2032 template_param_infos.args.push_back( 2033 clang::TemplateArgument(ClangUtil::GetQualType(clang_type))); 2034 } 2035 } else { 2036 return false; 2037 } 2038 } 2039 } 2040 return true; 2041 2042 default: 2043 break; 2044 } 2045 return false; 2046} 2047 2048bool DWARFASTParserClang::ParseTemplateParameterInfos( 2049 const DWARFDIE &parent_die, 2050 ClangASTContext::TemplateParameterInfos &template_param_infos) { 2051 2052 if (!parent_die) 2053 return false; 2054 2055 Args template_parameter_names; 2056 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2057 die = die.GetSibling()) { 2058 const dw_tag_t tag = die.Tag(); 2059 2060 switch (tag) { 2061 case DW_TAG_template_type_parameter: 2062 case DW_TAG_template_value_parameter: 2063 case DW_TAG_GNU_template_parameter_pack: 2064 ParseTemplateDIE(die, template_param_infos); 2065 break; 2066 2067 default: 2068 break; 2069 } 2070 } 2071 if (template_param_infos.args.empty()) 2072 return false; 2073 return template_param_infos.args.size() == template_param_infos.names.size(); 2074} 2075 2076bool DWARFASTParserClang::CompleteTypeFromDWARF(const DWARFDIE &die, 2077 lldb_private::Type *type, 2078 CompilerType &clang_type) { 2079 SymbolFileDWARF *dwarf = die.GetDWARF(); 2080 2081 std::lock_guard<std::recursive_mutex> guard( 2082 dwarf->GetObjectFile()->GetModule()->GetMutex()); 2083 2084 // Disable external storage for this type so we don't get anymore 2085 // clang::ExternalASTSource queries for this type. 2086 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), false); 2087 2088 if (!die) 2089 return false; 2090 2091#if defined LLDB_CONFIGURATION_DEBUG 2092 //---------------------------------------------------------------------- 2093 // For debugging purposes, the LLDB_DWARF_DONT_COMPLETE_TYPENAMES 2094 // environment variable can be set with one or more typenames separated 2095 // by ';' characters. This will cause this function to not complete any 2096 // types whose names match. 2097 // 2098 // Examples of setting this environment variable: 2099 // 2100 // LLDB_DWARF_DONT_COMPLETE_TYPENAMES=Foo 2101 // LLDB_DWARF_DONT_COMPLETE_TYPENAMES=Foo;Bar;Baz 2102 //---------------------------------------------------------------------- 2103 const char *dont_complete_typenames_cstr = 2104 getenv("LLDB_DWARF_DONT_COMPLETE_TYPENAMES"); 2105 if (dont_complete_typenames_cstr && dont_complete_typenames_cstr[0]) { 2106 const char *die_name = die.GetName(); 2107 if (die_name && die_name[0]) { 2108 const char *match = strstr(dont_complete_typenames_cstr, die_name); 2109 if (match) { 2110 size_t die_name_length = strlen(die_name); 2111 while (match) { 2112 const char separator_char = ';'; 2113 const char next_char = match[die_name_length]; 2114 if (next_char == '\0' || next_char == separator_char) { 2115 if (match == dont_complete_typenames_cstr || 2116 match[-1] == separator_char) 2117 return false; 2118 } 2119 match = strstr(match + 1, die_name); 2120 } 2121 } 2122 } 2123 } 2124#endif 2125 2126 const dw_tag_t tag = die.Tag(); 2127 2128 Log *log = 2129 nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION)); 2130 if (log) 2131 dwarf->GetObjectFile()->GetModule()->LogMessageVerboseBacktrace( 2132 log, "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...", 2133 die.GetID(), die.GetTagAsCString(), type->GetName().AsCString()); 2134 assert(clang_type); 2135 DWARFAttributes attributes; 2136 switch (tag) { 2137 case DW_TAG_structure_type: 2138 case DW_TAG_union_type: 2139 case DW_TAG_class_type: { 2140 ClangASTImporter::LayoutInfo layout_info; 2141 2142 { 2143 if (die.HasChildren()) { 2144 LanguageType class_language = eLanguageTypeUnknown; 2145 if (ClangASTContext::IsObjCObjectOrInterfaceType(clang_type)) { 2146 class_language = eLanguageTypeObjC; 2147 // For objective C we don't start the definition when 2148 // the class is created. 2149 ClangASTContext::StartTagDeclarationDefinition(clang_type); 2150 } 2151 2152 int tag_decl_kind = -1; 2153 AccessType default_accessibility = eAccessNone; 2154 if (tag == DW_TAG_structure_type) { 2155 tag_decl_kind = clang::TTK_Struct; 2156 default_accessibility = eAccessPublic; 2157 } else if (tag == DW_TAG_union_type) { 2158 tag_decl_kind = clang::TTK_Union; 2159 default_accessibility = eAccessPublic; 2160 } else if (tag == DW_TAG_class_type) { 2161 tag_decl_kind = clang::TTK_Class; 2162 default_accessibility = eAccessPrivate; 2163 } 2164 2165 SymbolContext sc(die.GetLLDBCompileUnit()); 2166 std::vector<clang::CXXBaseSpecifier *> base_classes; 2167 std::vector<int> member_accessibilities; 2168 bool is_a_class = false; 2169 // Parse members and base classes first 2170 DWARFDIECollection member_function_dies; 2171 2172 DelayedPropertyList delayed_properties; 2173 ParseChildMembers(sc, die, clang_type, class_language, base_classes, 2174 member_accessibilities, member_function_dies, 2175 delayed_properties, default_accessibility, is_a_class, 2176 layout_info); 2177 2178 // Now parse any methods if there were any... 2179 size_t num_functions = member_function_dies.Size(); 2180 if (num_functions > 0) { 2181 for (size_t i = 0; i < num_functions; ++i) { 2182 dwarf->ResolveType(member_function_dies.GetDIEAtIndex(i)); 2183 } 2184 } 2185 2186 if (class_language == eLanguageTypeObjC) { 2187 ConstString class_name(clang_type.GetTypeName()); 2188 if (class_name) { 2189 DIEArray method_die_offsets; 2190 dwarf->GetObjCMethodDIEOffsets(class_name, method_die_offsets); 2191 2192 if (!method_die_offsets.empty()) { 2193 DWARFDebugInfo *debug_info = dwarf->DebugInfo(); 2194 2195 const size_t num_matches = method_die_offsets.size(); 2196 for (size_t i = 0; i < num_matches; ++i) { 2197 const DIERef &die_ref = method_die_offsets[i]; 2198 DWARFDIE method_die = debug_info->GetDIE(die_ref); 2199 2200 if (method_die) 2201 method_die.ResolveType(); 2202 } 2203 } 2204 2205 for (DelayedPropertyList::iterator pi = delayed_properties.begin(), 2206 pe = delayed_properties.end(); 2207 pi != pe; ++pi) 2208 pi->Finalize(); 2209 } 2210 } 2211 2212 // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we 2213 // need to tell the clang type it is actually a class. 2214 if (class_language != eLanguageTypeObjC) { 2215 if (is_a_class && tag_decl_kind != clang::TTK_Class) 2216 m_ast.SetTagTypeKind(ClangUtil::GetQualType(clang_type), 2217 clang::TTK_Class); 2218 } 2219 2220 // Since DW_TAG_structure_type gets used for both classes 2221 // and structures, we may need to set any DW_TAG_member 2222 // fields to have a "private" access if none was specified. 2223 // When we parsed the child members we tracked that actual 2224 // accessibility value for each DW_TAG_member in the 2225 // "member_accessibilities" array. If the value for the 2226 // member is zero, then it was set to the "default_accessibility" 2227 // which for structs was "public". Below we correct this 2228 // by setting any fields to "private" that weren't correctly 2229 // set. 2230 if (is_a_class && !member_accessibilities.empty()) { 2231 // This is a class and all members that didn't have 2232 // their access specified are private. 2233 m_ast.SetDefaultAccessForRecordFields( 2234 m_ast.GetAsRecordDecl(clang_type), eAccessPrivate, 2235 &member_accessibilities.front(), member_accessibilities.size()); 2236 } 2237 2238 if (!base_classes.empty()) { 2239 // Make sure all base classes refer to complete types and not 2240 // forward declarations. If we don't do this, clang will crash 2241 // with an assertion in the call to 2242 // clang_type.SetBaseClassesForClassType() 2243 for (auto &base_class : base_classes) { 2244 clang::TypeSourceInfo *type_source_info = 2245 base_class->getTypeSourceInfo(); 2246 if (type_source_info) { 2247 CompilerType base_class_type( 2248 &m_ast, type_source_info->getType().getAsOpaquePtr()); 2249 if (base_class_type.GetCompleteType() == false) { 2250 auto module = dwarf->GetObjectFile()->GetModule(); 2251 module->ReportError(":: Class '%s' has a base class '%s' which " 2252 "does not have a complete definition.", 2253 die.GetName(), 2254 base_class_type.GetTypeName().GetCString()); 2255 if (die.GetCU()->GetProducer() == 2256 DWARFCompileUnit::eProducerClang) 2257 module->ReportError(":: Try compiling the source file with " 2258 "-fstandalone-debug."); 2259 2260 // We have no choice other than to pretend that the base class 2261 // is complete. If we don't do this, clang will crash when we 2262 // call setBases() inside of 2263 // "clang_type.SetBaseClassesForClassType()" 2264 // below. Since we provide layout assistance, all ivars in this 2265 // class and other classes will be fine, this is the best we can 2266 // do 2267 // short of crashing. 2268 if (ClangASTContext::StartTagDeclarationDefinition( 2269 base_class_type)) { 2270 ClangASTContext::CompleteTagDeclarationDefinition( 2271 base_class_type); 2272 } 2273 } 2274 } 2275 } 2276 m_ast.SetBaseClassesForClassType(clang_type.GetOpaqueQualType(), 2277 &base_classes.front(), 2278 base_classes.size()); 2279 2280 // Clang will copy each CXXBaseSpecifier in "base_classes" 2281 // so we have to free them all. 2282 ClangASTContext::DeleteBaseClassSpecifiers(&base_classes.front(), 2283 base_classes.size()); 2284 } 2285 } 2286 } 2287 2288 ClangASTContext::BuildIndirectFields(clang_type); 2289 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 2290 2291 if (!layout_info.field_offsets.empty() || 2292 !layout_info.base_offsets.empty() || 2293 !layout_info.vbase_offsets.empty()) { 2294 if (type) 2295 layout_info.bit_size = type->GetByteSize() * 8; 2296 if (layout_info.bit_size == 0) 2297 layout_info.bit_size = 2298 die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 0) * 8; 2299 2300 clang::CXXRecordDecl *record_decl = 2301 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 2302 if (record_decl) { 2303 if (log) { 2304 ModuleSP module_sp = dwarf->GetObjectFile()->GetModule(); 2305 2306 if (module_sp) { 2307 module_sp->LogMessage( 2308 log, 2309 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) " 2310 "caching layout info for record_decl = %p, bit_size = %" PRIu64 2311 ", alignment = %" PRIu64 2312 ", field_offsets[%u], base_offsets[%u], vbase_offsets[%u])", 2313 static_cast<void *>(clang_type.GetOpaqueQualType()), 2314 static_cast<void *>(record_decl), layout_info.bit_size, 2315 layout_info.alignment, 2316 static_cast<uint32_t>(layout_info.field_offsets.size()), 2317 static_cast<uint32_t>(layout_info.base_offsets.size()), 2318 static_cast<uint32_t>(layout_info.vbase_offsets.size())); 2319 2320 uint32_t idx; 2321 { 2322 llvm::DenseMap<const clang::FieldDecl *, uint64_t>::const_iterator 2323 pos, 2324 end = layout_info.field_offsets.end(); 2325 for (idx = 0, pos = layout_info.field_offsets.begin(); pos != end; 2326 ++pos, ++idx) { 2327 module_sp->LogMessage( 2328 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2329 "%p) field[%u] = { bit_offset=%u, name='%s' }", 2330 static_cast<void *>(clang_type.GetOpaqueQualType()), idx, 2331 static_cast<uint32_t>(pos->second), 2332 pos->first->getNameAsString().c_str()); 2333 } 2334 } 2335 2336 { 2337 llvm::DenseMap<const clang::CXXRecordDecl *, 2338 clang::CharUnits>::const_iterator base_pos, 2339 base_end = layout_info.base_offsets.end(); 2340 for (idx = 0, base_pos = layout_info.base_offsets.begin(); 2341 base_pos != base_end; ++base_pos, ++idx) { 2342 module_sp->LogMessage( 2343 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2344 "%p) base[%u] = { byte_offset=%u, name='%s' }", 2345 clang_type.GetOpaqueQualType(), idx, 2346 (uint32_t)base_pos->second.getQuantity(), 2347 base_pos->first->getNameAsString().c_str()); 2348 } 2349 } 2350 { 2351 llvm::DenseMap<const clang::CXXRecordDecl *, 2352 clang::CharUnits>::const_iterator vbase_pos, 2353 vbase_end = layout_info.vbase_offsets.end(); 2354 for (idx = 0, vbase_pos = layout_info.vbase_offsets.begin(); 2355 vbase_pos != vbase_end; ++vbase_pos, ++idx) { 2356 module_sp->LogMessage( 2357 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2358 "%p) vbase[%u] = { byte_offset=%u, name='%s' }", 2359 static_cast<void *>(clang_type.GetOpaqueQualType()), idx, 2360 static_cast<uint32_t>(vbase_pos->second.getQuantity()), 2361 vbase_pos->first->getNameAsString().c_str()); 2362 } 2363 } 2364 } 2365 } 2366 GetClangASTImporter().InsertRecordDecl(record_decl, layout_info); 2367 } 2368 } 2369 } 2370 2371 return (bool)clang_type; 2372 2373 case DW_TAG_enumeration_type: 2374 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 2375 if (die.HasChildren()) { 2376 SymbolContext sc(die.GetLLDBCompileUnit()); 2377 bool is_signed = false; 2378 clang_type.IsIntegerType(is_signed); 2379 ParseChildEnumerators(sc, clang_type, is_signed, type->GetByteSize(), 2380 die); 2381 } 2382 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 2383 } 2384 return (bool)clang_type; 2385 2386 default: 2387 assert(false && "not a forward clang type decl!"); 2388 break; 2389 } 2390 2391 return false; 2392} 2393 2394std::vector<DWARFDIE> DWARFASTParserClang::GetDIEForDeclContext( 2395 lldb_private::CompilerDeclContext decl_context) { 2396 std::vector<DWARFDIE> result; 2397 for (auto it = m_decl_ctx_to_die.find( 2398 (clang::DeclContext *)decl_context.GetOpaqueDeclContext()); 2399 it != m_decl_ctx_to_die.end(); it++) 2400 result.push_back(it->second); 2401 return result; 2402} 2403 2404CompilerDecl DWARFASTParserClang::GetDeclForUIDFromDWARF(const DWARFDIE &die) { 2405 clang::Decl *clang_decl = GetClangDeclForDIE(die); 2406 if (clang_decl != nullptr) 2407 return CompilerDecl(&m_ast, clang_decl); 2408 return CompilerDecl(); 2409} 2410 2411CompilerDeclContext 2412DWARFASTParserClang::GetDeclContextForUIDFromDWARF(const DWARFDIE &die) { 2413 clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE(die); 2414 if (clang_decl_ctx) 2415 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2416 return CompilerDeclContext(); 2417} 2418 2419CompilerDeclContext 2420DWARFASTParserClang::GetDeclContextContainingUIDFromDWARF(const DWARFDIE &die) { 2421 clang::DeclContext *clang_decl_ctx = 2422 GetClangDeclContextContainingDIE(die, nullptr); 2423 if (clang_decl_ctx) 2424 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2425 return CompilerDeclContext(); 2426} 2427 2428size_t DWARFASTParserClang::ParseChildEnumerators( 2429 const SymbolContext &sc, lldb_private::CompilerType &clang_type, 2430 bool is_signed, uint32_t enumerator_byte_size, const DWARFDIE &parent_die) { 2431 if (!parent_die) 2432 return 0; 2433 2434 size_t enumerators_added = 0; 2435 2436 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2437 die = die.GetSibling()) { 2438 const dw_tag_t tag = die.Tag(); 2439 if (tag == DW_TAG_enumerator) { 2440 DWARFAttributes attributes; 2441 const size_t num_child_attributes = die.GetAttributes(attributes); 2442 if (num_child_attributes > 0) { 2443 const char *name = NULL; 2444 bool got_value = false; 2445 int64_t enum_value = 0; 2446 Declaration decl; 2447 2448 uint32_t i; 2449 for (i = 0; i < num_child_attributes; ++i) { 2450 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2451 DWARFFormValue form_value; 2452 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2453 switch (attr) { 2454 case DW_AT_const_value: 2455 got_value = true; 2456 if (is_signed) 2457 enum_value = form_value.Signed(); 2458 else 2459 enum_value = form_value.Unsigned(); 2460 break; 2461 2462 case DW_AT_name: 2463 name = form_value.AsCString(); 2464 break; 2465 2466 case DW_AT_description: 2467 default: 2468 case DW_AT_decl_file: 2469 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 2470 form_value.Unsigned())); 2471 break; 2472 case DW_AT_decl_line: 2473 decl.SetLine(form_value.Unsigned()); 2474 break; 2475 case DW_AT_decl_column: 2476 decl.SetColumn(form_value.Unsigned()); 2477 break; 2478 case DW_AT_sibling: 2479 break; 2480 } 2481 } 2482 } 2483 2484 if (name && name[0] && got_value) { 2485 m_ast.AddEnumerationValueToEnumerationType( 2486 clang_type.GetOpaqueQualType(), 2487 m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType()), 2488 decl, name, enum_value, enumerator_byte_size * 8); 2489 ++enumerators_added; 2490 } 2491 } 2492 } 2493 } 2494 return enumerators_added; 2495} 2496 2497#if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE) 2498 2499class DIEStack { 2500public: 2501 void Push(const DWARFDIE &die) { m_dies.push_back(die); } 2502 2503 void LogDIEs(Log *log) { 2504 StreamString log_strm; 2505 const size_t n = m_dies.size(); 2506 log_strm.Printf("DIEStack[%" PRIu64 "]:\n", (uint64_t)n); 2507 for (size_t i = 0; i < n; i++) { 2508 std::string qualified_name; 2509 const DWARFDIE &die = m_dies[i]; 2510 die.GetQualifiedName(qualified_name); 2511 log_strm.Printf("[%" PRIu64 "] 0x%8.8x: %s name='%s'\n", (uint64_t)i, 2512 die.GetOffset(), die.GetTagAsCString(), 2513 qualified_name.c_str()); 2514 } 2515 log->PutCString(log_strm.GetData()); 2516 } 2517 void Pop() { m_dies.pop_back(); } 2518 2519 class ScopedPopper { 2520 public: 2521 ScopedPopper(DIEStack &die_stack) 2522 : m_die_stack(die_stack), m_valid(false) {} 2523 2524 void Push(const DWARFDIE &die) { 2525 m_valid = true; 2526 m_die_stack.Push(die); 2527 } 2528 2529 ~ScopedPopper() { 2530 if (m_valid) 2531 m_die_stack.Pop(); 2532 } 2533 2534 protected: 2535 DIEStack &m_die_stack; 2536 bool m_valid; 2537 }; 2538 2539protected: 2540 typedef std::vector<DWARFDIE> Stack; 2541 Stack m_dies; 2542}; 2543#endif 2544 2545Function *DWARFASTParserClang::ParseFunctionFromDWARF(const SymbolContext &sc, 2546 const DWARFDIE &die) { 2547 DWARFRangeList func_ranges; 2548 const char *name = NULL; 2549 const char *mangled = NULL; 2550 int decl_file = 0; 2551 int decl_line = 0; 2552 int decl_column = 0; 2553 int call_file = 0; 2554 int call_line = 0; 2555 int call_column = 0; 2556 DWARFExpression frame_base(die.GetCU()); 2557 2558 const dw_tag_t tag = die.Tag(); 2559 2560 if (tag != DW_TAG_subprogram) 2561 return NULL; 2562 2563 if (die.GetDIENamesAndRanges(name, mangled, func_ranges, decl_file, decl_line, 2564 decl_column, call_file, call_line, call_column, 2565 &frame_base)) { 2566 2567 // Union of all ranges in the function DIE (if the function is 2568 // discontiguous) 2569 AddressRange func_range; 2570 lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase(0); 2571 lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd(0); 2572 if (lowest_func_addr != LLDB_INVALID_ADDRESS && 2573 lowest_func_addr <= highest_func_addr) { 2574 ModuleSP module_sp(die.GetModule()); 2575 func_range.GetBaseAddress().ResolveAddressUsingFileSections( 2576 lowest_func_addr, module_sp->GetSectionList()); 2577 if (func_range.GetBaseAddress().IsValid()) 2578 func_range.SetByteSize(highest_func_addr - lowest_func_addr); 2579 } 2580 2581 if (func_range.GetBaseAddress().IsValid()) { 2582 Mangled func_name; 2583 if (mangled) 2584 func_name.SetValue(ConstString(mangled), true); 2585 else if (die.GetParent().Tag() == DW_TAG_compile_unit && 2586 Language::LanguageIsCPlusPlus(die.GetLanguage()) && name && 2587 strcmp(name, "main") != 0) { 2588 // If the mangled name is not present in the DWARF, generate the 2589 // demangled name 2590 // using the decl context. We skip if the function is "main" as its name 2591 // is 2592 // never mangled. 2593 bool is_static = false; 2594 bool is_variadic = false; 2595 bool has_template_params = false; 2596 unsigned type_quals = 0; 2597 std::vector<CompilerType> param_types; 2598 std::vector<clang::ParmVarDecl *> param_decls; 2599 DWARFDeclContext decl_ctx; 2600 StreamString sstr; 2601 2602 die.GetDWARFDeclContext(decl_ctx); 2603 sstr << decl_ctx.GetQualifiedName(); 2604 2605 clang::DeclContext *containing_decl_ctx = 2606 GetClangDeclContextContainingDIE(die, nullptr); 2607 ParseChildParameters(sc, containing_decl_ctx, die, true, is_static, 2608 is_variadic, has_template_params, param_types, 2609 param_decls, type_quals); 2610 sstr << "("; 2611 for (size_t i = 0; i < param_types.size(); i++) { 2612 if (i > 0) 2613 sstr << ", "; 2614 sstr << param_types[i].GetTypeName(); 2615 } 2616 if (is_variadic) 2617 sstr << ", ..."; 2618 sstr << ")"; 2619 if (type_quals & clang::Qualifiers::Const) 2620 sstr << " const"; 2621 2622 func_name.SetValue(ConstString(sstr.GetString()), false); 2623 } else 2624 func_name.SetValue(ConstString(name), false); 2625 2626 FunctionSP func_sp; 2627 std::unique_ptr<Declaration> decl_ap; 2628 if (decl_file != 0 || decl_line != 0 || decl_column != 0) 2629 decl_ap.reset(new Declaration( 2630 sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file), 2631 decl_line, decl_column)); 2632 2633 SymbolFileDWARF *dwarf = die.GetDWARF(); 2634 // Supply the type _only_ if it has already been parsed 2635 Type *func_type = dwarf->GetDIEToType().lookup(die.GetDIE()); 2636 2637 assert(func_type == NULL || func_type != DIE_IS_BEING_PARSED); 2638 2639 if (dwarf->FixupAddress(func_range.GetBaseAddress())) { 2640 const user_id_t func_user_id = die.GetID(); 2641 func_sp.reset(new Function(sc.comp_unit, 2642 func_user_id, // UserID is the DIE offset 2643 func_user_id, func_name, func_type, 2644 func_range)); // first address range 2645 2646 if (func_sp.get() != NULL) { 2647 if (frame_base.IsValid()) 2648 func_sp->GetFrameBaseExpression() = frame_base; 2649 sc.comp_unit->AddFunction(func_sp); 2650 return func_sp.get(); 2651 } 2652 } 2653 } 2654 } 2655 return NULL; 2656} 2657 2658bool DWARFASTParserClang::ParseChildMembers( 2659 const SymbolContext &sc, const DWARFDIE &parent_die, 2660 CompilerType &class_clang_type, const LanguageType class_language, 2661 std::vector<clang::CXXBaseSpecifier *> &base_classes, 2662 std::vector<int> &member_accessibilities, 2663 DWARFDIECollection &member_function_dies, 2664 DelayedPropertyList &delayed_properties, AccessType &default_accessibility, 2665 bool &is_a_class, ClangASTImporter::LayoutInfo &layout_info) { 2666 if (!parent_die) 2667 return 0; 2668 2669 // Get the parent byte size so we can verify any members will fit 2670 const uint64_t parent_byte_size = 2671 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, UINT64_MAX); 2672 const uint64_t parent_bit_size = 2673 parent_byte_size == UINT64_MAX ? UINT64_MAX : parent_byte_size * 8; 2674 2675 uint32_t member_idx = 0; 2676 BitfieldInfo last_field_info; 2677 2678 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule(); 2679 ClangASTContext *ast = 2680 llvm::dyn_cast_or_null<ClangASTContext>(class_clang_type.GetTypeSystem()); 2681 if (ast == nullptr) 2682 return 0; 2683 2684 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2685 die = die.GetSibling()) { 2686 dw_tag_t tag = die.Tag(); 2687 2688 switch (tag) { 2689 case DW_TAG_member: 2690 case DW_TAG_APPLE_property: { 2691 DWARFAttributes attributes; 2692 const size_t num_attributes = die.GetAttributes(attributes); 2693 if (num_attributes > 0) { 2694 Declaration decl; 2695 // DWARFExpression location; 2696 const char *name = NULL; 2697 const char *prop_name = NULL; 2698 const char *prop_getter_name = NULL; 2699 const char *prop_setter_name = NULL; 2700 uint32_t prop_attributes = 0; 2701 2702 bool is_artificial = false; 2703 DWARFFormValue encoding_form; 2704 AccessType accessibility = eAccessNone; 2705 uint32_t member_byte_offset = 2706 (parent_die.Tag() == DW_TAG_union_type) ? 0 : UINT32_MAX; 2707 size_t byte_size = 0; 2708 int64_t bit_offset = 0; 2709 uint64_t data_bit_offset = UINT64_MAX; 2710 size_t bit_size = 0; 2711 bool is_external = 2712 false; // On DW_TAG_members, this means the member is static 2713 uint32_t i; 2714 for (i = 0; i < num_attributes && !is_artificial; ++i) { 2715 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2716 DWARFFormValue form_value; 2717 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2718 switch (attr) { 2719 case DW_AT_decl_file: 2720 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 2721 form_value.Unsigned())); 2722 break; 2723 case DW_AT_decl_line: 2724 decl.SetLine(form_value.Unsigned()); 2725 break; 2726 case DW_AT_decl_column: 2727 decl.SetColumn(form_value.Unsigned()); 2728 break; 2729 case DW_AT_name: 2730 name = form_value.AsCString(); 2731 break; 2732 case DW_AT_type: 2733 encoding_form = form_value; 2734 break; 2735 case DW_AT_bit_offset: 2736 bit_offset = form_value.Signed(); 2737 break; 2738 case DW_AT_bit_size: 2739 bit_size = form_value.Unsigned(); 2740 break; 2741 case DW_AT_byte_size: 2742 byte_size = form_value.Unsigned(); 2743 break; 2744 case DW_AT_data_bit_offset: 2745 data_bit_offset = form_value.Unsigned(); 2746 break; 2747 case DW_AT_data_member_location: 2748 if (form_value.BlockData()) { 2749 Value initialValue(0); 2750 Value memberOffset(0); 2751 const DWARFDataExtractor &debug_info_data = 2752 die.GetDWARF()->get_debug_info_data(); 2753 uint32_t block_length = form_value.Unsigned(); 2754 uint32_t block_offset = 2755 form_value.BlockData() - debug_info_data.GetDataStart(); 2756 if (DWARFExpression::Evaluate( 2757 nullptr, // ExecutionContext * 2758 nullptr, // RegisterContext * 2759 module_sp, debug_info_data, die.GetCU(), block_offset, 2760 block_length, eRegisterKindDWARF, &initialValue, 2761 nullptr, memberOffset, nullptr)) { 2762 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 2763 } 2764 } else { 2765 // With DWARF 3 and later, if the value is an integer constant, 2766 // this form value is the offset in bytes from the beginning 2767 // of the containing entity. 2768 member_byte_offset = form_value.Unsigned(); 2769 } 2770 break; 2771 2772 case DW_AT_accessibility: 2773 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 2774 break; 2775 case DW_AT_artificial: 2776 is_artificial = form_value.Boolean(); 2777 break; 2778 case DW_AT_APPLE_property_name: 2779 prop_name = form_value.AsCString(); 2780 break; 2781 case DW_AT_APPLE_property_getter: 2782 prop_getter_name = form_value.AsCString(); 2783 break; 2784 case DW_AT_APPLE_property_setter: 2785 prop_setter_name = form_value.AsCString(); 2786 break; 2787 case DW_AT_APPLE_property_attribute: 2788 prop_attributes = form_value.Unsigned(); 2789 break; 2790 case DW_AT_external: 2791 is_external = form_value.Boolean(); 2792 break; 2793 2794 default: 2795 case DW_AT_declaration: 2796 case DW_AT_description: 2797 case DW_AT_mutable: 2798 case DW_AT_visibility: 2799 case DW_AT_sibling: 2800 break; 2801 } 2802 } 2803 } 2804 2805 if (prop_name) { 2806 ConstString fixed_getter; 2807 ConstString fixed_setter; 2808 2809 // Check if the property getter/setter were provided as full 2810 // names. We want basenames, so we extract them. 2811 2812 if (prop_getter_name && prop_getter_name[0] == '-') { 2813 ObjCLanguage::MethodName prop_getter_method(prop_getter_name, true); 2814 prop_getter_name = prop_getter_method.GetSelector().GetCString(); 2815 } 2816 2817 if (prop_setter_name && prop_setter_name[0] == '-') { 2818 ObjCLanguage::MethodName prop_setter_method(prop_setter_name, true); 2819 prop_setter_name = prop_setter_method.GetSelector().GetCString(); 2820 } 2821 2822 // If the names haven't been provided, they need to be 2823 // filled in. 2824 2825 if (!prop_getter_name) { 2826 prop_getter_name = prop_name; 2827 } 2828 if (!prop_setter_name && prop_name[0] && 2829 !(prop_attributes & DW_APPLE_PROPERTY_readonly)) { 2830 StreamString ss; 2831 2832 ss.Printf("set%c%s:", toupper(prop_name[0]), &prop_name[1]); 2833 2834 fixed_setter.SetString(ss.GetString()); 2835 prop_setter_name = fixed_setter.GetCString(); 2836 } 2837 } 2838 2839 // Clang has a DWARF generation bug where sometimes it 2840 // represents fields that are references with bad byte size 2841 // and bit size/offset information such as: 2842 // 2843 // DW_AT_byte_size( 0x00 ) 2844 // DW_AT_bit_size( 0x40 ) 2845 // DW_AT_bit_offset( 0xffffffffffffffc0 ) 2846 // 2847 // So check the bit offset to make sure it is sane, and if 2848 // the values are not sane, remove them. If we don't do this 2849 // then we will end up with a crash if we try to use this 2850 // type in an expression when clang becomes unhappy with its 2851 // recycled debug info. 2852 2853 if (byte_size == 0 && bit_offset < 0) { 2854 bit_size = 0; 2855 bit_offset = 0; 2856 } 2857 2858 // FIXME: Make Clang ignore Objective-C accessibility for expressions 2859 if (class_language == eLanguageTypeObjC || 2860 class_language == eLanguageTypeObjC_plus_plus) 2861 accessibility = eAccessNone; 2862 2863 if (member_idx == 0 && !is_artificial && name && 2864 (strstr(name, "_vptr$") == name)) { 2865 // Not all compilers will mark the vtable pointer 2866 // member as artificial (llvm-gcc). We can't have 2867 // the virtual members in our classes otherwise it 2868 // throws off all child offsets since we end up 2869 // having and extra pointer sized member in our 2870 // class layouts. 2871 is_artificial = true; 2872 } 2873 2874 // Handle static members 2875 if (is_external && member_byte_offset == UINT32_MAX) { 2876 Type *var_type = die.ResolveTypeUID(DIERef(encoding_form)); 2877 2878 if (var_type) { 2879 if (accessibility == eAccessNone) 2880 accessibility = eAccessPublic; 2881 ClangASTContext::AddVariableToRecordType( 2882 class_clang_type, name, var_type->GetLayoutCompilerType(), 2883 accessibility); 2884 } 2885 break; 2886 } 2887 2888 if (is_artificial == false) { 2889 Type *member_type = die.ResolveTypeUID(DIERef(encoding_form)); 2890 2891 clang::FieldDecl *field_decl = NULL; 2892 if (tag == DW_TAG_member) { 2893 if (member_type) { 2894 if (accessibility == eAccessNone) 2895 accessibility = default_accessibility; 2896 member_accessibilities.push_back(accessibility); 2897 2898 uint64_t field_bit_offset = 2899 (member_byte_offset == UINT32_MAX ? 0 2900 : (member_byte_offset * 8)); 2901 if (bit_size > 0) { 2902 2903 BitfieldInfo this_field_info; 2904 this_field_info.bit_offset = field_bit_offset; 2905 this_field_info.bit_size = bit_size; 2906 2907 ///////////////////////////////////////////////////////////// 2908 // How to locate a field given the DWARF debug information 2909 // 2910 // AT_byte_size indicates the size of the word in which the 2911 // bit offset must be interpreted. 2912 // 2913 // AT_data_member_location indicates the byte offset of the 2914 // word from the base address of the structure. 2915 // 2916 // AT_bit_offset indicates how many bits into the word 2917 // (according to the host endianness) the low-order bit of 2918 // the field starts. AT_bit_offset can be negative. 2919 // 2920 // AT_bit_size indicates the size of the field in bits. 2921 ///////////////////////////////////////////////////////////// 2922 2923 if (data_bit_offset != UINT64_MAX) { 2924 this_field_info.bit_offset = data_bit_offset; 2925 } else { 2926 if (byte_size == 0) 2927 byte_size = member_type->GetByteSize(); 2928 2929 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 2930 if (objfile->GetByteOrder() == eByteOrderLittle) { 2931 this_field_info.bit_offset += byte_size * 8; 2932 this_field_info.bit_offset -= (bit_offset + bit_size); 2933 } else { 2934 this_field_info.bit_offset += bit_offset; 2935 } 2936 } 2937 2938 if ((this_field_info.bit_offset >= parent_bit_size) || 2939 !last_field_info.NextBitfieldOffsetIsValid( 2940 this_field_info.bit_offset)) { 2941 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 2942 objfile->GetModule()->ReportWarning( 2943 "0x%8.8" PRIx64 ": %s bitfield named \"%s\" has invalid " 2944 "bit offset (0x%8.8" PRIx64 2945 ") member will be ignored. Please file a bug against the " 2946 "compiler and include the preprocessed output for %s\n", 2947 die.GetID(), DW_TAG_value_to_name(tag), name, 2948 this_field_info.bit_offset, 2949 sc.comp_unit ? sc.comp_unit->GetPath().c_str() 2950 : "the source file"); 2951 this_field_info.Clear(); 2952 continue; 2953 } 2954 2955 // Update the field bit offset we will report for layout 2956 field_bit_offset = this_field_info.bit_offset; 2957 2958 // If the member to be emitted did not start on a character 2959 // boundary and there is 2960 // empty space between the last field and this one, then we need 2961 // to emit an 2962 // anonymous member filling up the space up to its start. There 2963 // are three cases 2964 // here: 2965 // 2966 // 1 If the previous member ended on a character boundary, then 2967 // we can emit an 2968 // anonymous member starting at the most recent character 2969 // boundary. 2970 // 2971 // 2 If the previous member did not end on a character boundary 2972 // and the distance 2973 // from the end of the previous member to the current member 2974 // is less than a 2975 // word width, then we can emit an anonymous member starting 2976 // right after the 2977 // previous member and right before this member. 2978 // 2979 // 3 If the previous member did not end on a character boundary 2980 // and the distance 2981 // from the end of the previous member to the current member 2982 // is greater than 2983 // or equal a word width, then we act as in Case 1. 2984 2985 const uint64_t character_width = 8; 2986 const uint64_t word_width = 32; 2987 2988 // Objective-C has invalid DW_AT_bit_offset values in older 2989 // versions 2990 // of clang, so we have to be careful and only insert unnamed 2991 // bitfields 2992 // if we have a new enough clang. 2993 bool detect_unnamed_bitfields = true; 2994 2995 if (class_language == eLanguageTypeObjC || 2996 class_language == eLanguageTypeObjC_plus_plus) 2997 detect_unnamed_bitfields = 2998 die.GetCU()->Supports_unnamed_objc_bitfields(); 2999 3000 if (detect_unnamed_bitfields) { 3001 BitfieldInfo anon_field_info; 3002 3003 if ((this_field_info.bit_offset % character_width) != 3004 0) // not char aligned 3005 { 3006 uint64_t last_field_end = 0; 3007 3008 if (last_field_info.IsValid()) 3009 last_field_end = 3010 last_field_info.bit_offset + last_field_info.bit_size; 3011 3012 if (this_field_info.bit_offset != last_field_end) { 3013 if (((last_field_end % character_width) == 0) || // case 1 3014 (this_field_info.bit_offset - last_field_end >= 3015 word_width)) // case 3 3016 { 3017 anon_field_info.bit_size = 3018 this_field_info.bit_offset % character_width; 3019 anon_field_info.bit_offset = 3020 this_field_info.bit_offset - 3021 anon_field_info.bit_size; 3022 } else // case 2 3023 { 3024 anon_field_info.bit_size = 3025 this_field_info.bit_offset - last_field_end; 3026 anon_field_info.bit_offset = last_field_end; 3027 } 3028 } 3029 } 3030 3031 if (anon_field_info.IsValid()) { 3032 clang::FieldDecl *unnamed_bitfield_decl = 3033 ClangASTContext::AddFieldToRecordType( 3034 class_clang_type, NULL, 3035 m_ast.GetBuiltinTypeForEncodingAndBitSize( 3036 eEncodingSint, word_width), 3037 accessibility, anon_field_info.bit_size); 3038 3039 layout_info.field_offsets.insert(std::make_pair( 3040 unnamed_bitfield_decl, anon_field_info.bit_offset)); 3041 } 3042 } 3043 last_field_info = this_field_info; 3044 } else { 3045 last_field_info.Clear(); 3046 } 3047 3048 CompilerType member_clang_type = 3049 member_type->GetLayoutCompilerType(); 3050 if (!member_clang_type.IsCompleteType()) 3051 member_clang_type.GetCompleteType(); 3052 3053 { 3054 // Older versions of clang emit array[0] and array[1] in the 3055 // same way (<rdar://problem/12566646>). 3056 // If the current field is at the end of the structure, then 3057 // there is definitely no room for extra 3058 // elements and we override the type to array[0]. 3059 3060 CompilerType member_array_element_type; 3061 uint64_t member_array_size; 3062 bool member_array_is_incomplete; 3063 3064 if (member_clang_type.IsArrayType( 3065 &member_array_element_type, &member_array_size, 3066 &member_array_is_incomplete) && 3067 !member_array_is_incomplete) { 3068 uint64_t parent_byte_size = 3069 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 3070 UINT64_MAX); 3071 3072 if (member_byte_offset >= parent_byte_size) { 3073 if (member_array_size != 1 && 3074 (member_array_size != 0 || 3075 member_byte_offset > parent_byte_size)) { 3076 module_sp->ReportError( 3077 "0x%8.8" PRIx64 3078 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 3079 " which extends beyond the bounds of 0x%8.8" PRIx64, 3080 die.GetID(), name, encoding_form.Reference(), 3081 parent_die.GetID()); 3082 } 3083 3084 member_clang_type = m_ast.CreateArrayType( 3085 member_array_element_type, 0, false); 3086 } 3087 } 3088 } 3089 3090 if (ClangASTContext::IsCXXClassType(member_clang_type) && 3091 member_clang_type.GetCompleteType() == false) { 3092 if (die.GetCU()->GetProducer() == 3093 DWARFCompileUnit::eProducerClang) 3094 module_sp->ReportError( 3095 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3096 "0x%8.8x (%s) whose type is a forward declaration, not a " 3097 "complete definition.\nTry compiling the source file " 3098 "with -fstandalone-debug", 3099 parent_die.GetOffset(), parent_die.GetName(), 3100 die.GetOffset(), name); 3101 else 3102 module_sp->ReportError( 3103 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3104 "0x%8.8x (%s) whose type is a forward declaration, not a " 3105 "complete definition.\nPlease file a bug against the " 3106 "compiler and include the preprocessed output for %s", 3107 parent_die.GetOffset(), parent_die.GetName(), 3108 die.GetOffset(), name, 3109 sc.comp_unit ? sc.comp_unit->GetPath().c_str() 3110 : "the source file"); 3111 // We have no choice other than to pretend that the member class 3112 // is complete. If we don't do this, clang will crash when 3113 // trying 3114 // to layout the class. Since we provide layout assistance, all 3115 // ivars in this class and other classes will be fine, this is 3116 // the best we can do short of crashing. 3117 if (ClangASTContext::StartTagDeclarationDefinition( 3118 member_clang_type)) { 3119 ClangASTContext::CompleteTagDeclarationDefinition( 3120 member_clang_type); 3121 } else { 3122 module_sp->ReportError( 3123 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3124 "0x%8.8x (%s) whose type claims to be a C++ class but we " 3125 "were not able to start its definition.\nPlease file a " 3126 "bug and attach the file at the start of this error " 3127 "message", 3128 parent_die.GetOffset(), parent_die.GetName(), 3129 die.GetOffset(), name); 3130 } 3131 } 3132 3133 field_decl = ClangASTContext::AddFieldToRecordType( 3134 class_clang_type, name, member_clang_type, accessibility, 3135 bit_size); 3136 3137 m_ast.SetMetadataAsUserID(field_decl, die.GetID()); 3138 3139 layout_info.field_offsets.insert( 3140 std::make_pair(field_decl, field_bit_offset)); 3141 } else { 3142 if (name) 3143 module_sp->ReportError( 3144 "0x%8.8" PRIx64 3145 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 3146 " which was unable to be parsed", 3147 die.GetID(), name, encoding_form.Reference()); 3148 else 3149 module_sp->ReportError( 3150 "0x%8.8" PRIx64 3151 ": DW_TAG_member refers to type 0x%8.8" PRIx64 3152 " which was unable to be parsed", 3153 die.GetID(), encoding_form.Reference()); 3154 } 3155 } 3156 3157 if (prop_name != NULL && member_type) { 3158 clang::ObjCIvarDecl *ivar_decl = NULL; 3159 3160 if (field_decl) { 3161 ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl); 3162 assert(ivar_decl != NULL); 3163 } 3164 3165 ClangASTMetadata metadata; 3166 metadata.SetUserID(die.GetID()); 3167 delayed_properties.push_back(DelayedAddObjCClassProperty( 3168 class_clang_type, prop_name, 3169 member_type->GetLayoutCompilerType(), ivar_decl, 3170 prop_setter_name, prop_getter_name, prop_attributes, 3171 &metadata)); 3172 3173 if (ivar_decl) 3174 m_ast.SetMetadataAsUserID(ivar_decl, die.GetID()); 3175 } 3176 } 3177 } 3178 ++member_idx; 3179 } break; 3180 3181 case DW_TAG_subprogram: 3182 // Let the type parsing code handle this one for us. 3183 member_function_dies.Append(die); 3184 break; 3185 3186 case DW_TAG_inheritance: { 3187 is_a_class = true; 3188 if (default_accessibility == eAccessNone) 3189 default_accessibility = eAccessPrivate; 3190 // TODO: implement DW_TAG_inheritance type parsing 3191 DWARFAttributes attributes; 3192 const size_t num_attributes = die.GetAttributes(attributes); 3193 if (num_attributes > 0) { 3194 Declaration decl; 3195 DWARFExpression location(die.GetCU()); 3196 DWARFFormValue encoding_form; 3197 AccessType accessibility = default_accessibility; 3198 bool is_virtual = false; 3199 bool is_base_of_class = true; 3200 off_t member_byte_offset = 0; 3201 uint32_t i; 3202 for (i = 0; i < num_attributes; ++i) { 3203 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3204 DWARFFormValue form_value; 3205 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3206 switch (attr) { 3207 case DW_AT_decl_file: 3208 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 3209 form_value.Unsigned())); 3210 break; 3211 case DW_AT_decl_line: 3212 decl.SetLine(form_value.Unsigned()); 3213 break; 3214 case DW_AT_decl_column: 3215 decl.SetColumn(form_value.Unsigned()); 3216 break; 3217 case DW_AT_type: 3218 encoding_form = form_value; 3219 break; 3220 case DW_AT_data_member_location: 3221 if (form_value.BlockData()) { 3222 Value initialValue(0); 3223 Value memberOffset(0); 3224 const DWARFDataExtractor &debug_info_data = 3225 die.GetDWARF()->get_debug_info_data(); 3226 uint32_t block_length = form_value.Unsigned(); 3227 uint32_t block_offset = 3228 form_value.BlockData() - debug_info_data.GetDataStart(); 3229 if (DWARFExpression::Evaluate(nullptr, nullptr, module_sp, 3230 debug_info_data, die.GetCU(), 3231 block_offset, block_length, 3232 eRegisterKindDWARF, &initialValue, 3233 nullptr, memberOffset, nullptr)) { 3234 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 3235 } 3236 } else { 3237 // With DWARF 3 and later, if the value is an integer constant, 3238 // this form value is the offset in bytes from the beginning 3239 // of the containing entity. 3240 member_byte_offset = form_value.Unsigned(); 3241 } 3242 break; 3243 3244 case DW_AT_accessibility: 3245 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 3246 break; 3247 3248 case DW_AT_virtuality: 3249 is_virtual = form_value.Boolean(); 3250 break; 3251 3252 case DW_AT_sibling: 3253 break; 3254 3255 default: 3256 break; 3257 } 3258 } 3259 } 3260 3261 Type *base_class_type = die.ResolveTypeUID(DIERef(encoding_form)); 3262 if (base_class_type == NULL) { 3263 module_sp->ReportError("0x%8.8x: DW_TAG_inheritance failed to " 3264 "resolve the base class at 0x%8.8" PRIx64 3265 " from enclosing type 0x%8.8x. \nPlease file " 3266 "a bug and attach the file at the start of " 3267 "this error message", 3268 die.GetOffset(), encoding_form.Reference(), 3269 parent_die.GetOffset()); 3270 break; 3271 } 3272 3273 CompilerType base_class_clang_type = 3274 base_class_type->GetFullCompilerType(); 3275 assert(base_class_clang_type); 3276 if (class_language == eLanguageTypeObjC) { 3277 ast->SetObjCSuperClass(class_clang_type, base_class_clang_type); 3278 } else { 3279 base_classes.push_back(ast->CreateBaseClassSpecifier( 3280 base_class_clang_type.GetOpaqueQualType(), accessibility, 3281 is_virtual, is_base_of_class)); 3282 3283 if (is_virtual) { 3284 // Do not specify any offset for virtual inheritance. The DWARF 3285 // produced by clang doesn't 3286 // give us a constant offset, but gives us a DWARF expressions that 3287 // requires an actual object 3288 // in memory. the DW_AT_data_member_location for a virtual base 3289 // class looks like: 3290 // DW_AT_data_member_location( DW_OP_dup, DW_OP_deref, 3291 // DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref, 3292 // DW_OP_plus ) 3293 // Given this, there is really no valid response we can give to 3294 // clang for virtual base 3295 // class offsets, and this should eventually be removed from 3296 // LayoutRecordType() in the external 3297 // AST source in clang. 3298 } else { 3299 layout_info.base_offsets.insert(std::make_pair( 3300 ast->GetAsCXXRecordDecl( 3301 base_class_clang_type.GetOpaqueQualType()), 3302 clang::CharUnits::fromQuantity(member_byte_offset))); 3303 } 3304 } 3305 } 3306 } break; 3307 3308 default: 3309 break; 3310 } 3311 } 3312 3313 return true; 3314} 3315 3316size_t DWARFASTParserClang::ParseChildParameters( 3317 const SymbolContext &sc, clang::DeclContext *containing_decl_ctx, 3318 const DWARFDIE &parent_die, bool skip_artificial, bool &is_static, 3319 bool &is_variadic, bool &has_template_params, 3320 std::vector<CompilerType> &function_param_types, 3321 std::vector<clang::ParmVarDecl *> &function_param_decls, 3322 unsigned &type_quals) { 3323 if (!parent_die) 3324 return 0; 3325 3326 size_t arg_idx = 0; 3327 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 3328 die = die.GetSibling()) { 3329 const dw_tag_t tag = die.Tag(); 3330 switch (tag) { 3331 case DW_TAG_formal_parameter: { 3332 DWARFAttributes attributes; 3333 const size_t num_attributes = die.GetAttributes(attributes); 3334 if (num_attributes > 0) { 3335 const char *name = NULL; 3336 Declaration decl; 3337 DWARFFormValue param_type_die_form; 3338 bool is_artificial = false; 3339 // one of None, Auto, Register, Extern, Static, PrivateExtern 3340 3341 clang::StorageClass storage = clang::SC_None; 3342 uint32_t i; 3343 for (i = 0; i < num_attributes; ++i) { 3344 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3345 DWARFFormValue form_value; 3346 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3347 switch (attr) { 3348 case DW_AT_decl_file: 3349 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 3350 form_value.Unsigned())); 3351 break; 3352 case DW_AT_decl_line: 3353 decl.SetLine(form_value.Unsigned()); 3354 break; 3355 case DW_AT_decl_column: 3356 decl.SetColumn(form_value.Unsigned()); 3357 break; 3358 case DW_AT_name: 3359 name = form_value.AsCString(); 3360 break; 3361 case DW_AT_type: 3362 param_type_die_form = form_value; 3363 break; 3364 case DW_AT_artificial: 3365 is_artificial = form_value.Boolean(); 3366 break; 3367 case DW_AT_location: 3368 // if (form_value.BlockData()) 3369 // { 3370 // const DWARFDataExtractor& 3371 // debug_info_data = debug_info(); 3372 // uint32_t block_length = 3373 // form_value.Unsigned(); 3374 // DWARFDataExtractor 3375 // location(debug_info_data, 3376 // form_value.BlockData() - 3377 // debug_info_data.GetDataStart(), 3378 // block_length); 3379 // } 3380 // else 3381 // { 3382 // } 3383 // break; 3384 case DW_AT_const_value: 3385 case DW_AT_default_value: 3386 case DW_AT_description: 3387 case DW_AT_endianity: 3388 case DW_AT_is_optional: 3389 case DW_AT_segment: 3390 case DW_AT_variable_parameter: 3391 default: 3392 case DW_AT_abstract_origin: 3393 case DW_AT_sibling: 3394 break; 3395 } 3396 } 3397 } 3398 3399 bool skip = false; 3400 if (skip_artificial) { 3401 if (is_artificial) { 3402 // In order to determine if a C++ member function is 3403 // "const" we have to look at the const-ness of "this"... 3404 // Ugly, but that 3405 if (arg_idx == 0) { 3406 if (DeclKindIsCXXClass(containing_decl_ctx->getDeclKind())) { 3407 // Often times compilers omit the "this" name for the 3408 // specification DIEs, so we can't rely upon the name 3409 // being in the formal parameter DIE... 3410 if (name == NULL || ::strcmp(name, "this") == 0) { 3411 Type *this_type = 3412 die.ResolveTypeUID(DIERef(param_type_die_form)); 3413 if (this_type) { 3414 uint32_t encoding_mask = this_type->GetEncodingMask(); 3415 if (encoding_mask & Type::eEncodingIsPointerUID) { 3416 is_static = false; 3417 3418 if (encoding_mask & (1u << Type::eEncodingIsConstUID)) 3419 type_quals |= clang::Qualifiers::Const; 3420 if (encoding_mask & (1u << Type::eEncodingIsVolatileUID)) 3421 type_quals |= clang::Qualifiers::Volatile; 3422 } 3423 } 3424 } 3425 } 3426 } 3427 skip = true; 3428 } else { 3429 3430 // HACK: Objective C formal parameters "self" and "_cmd" 3431 // are not marked as artificial in the DWARF... 3432 CompileUnit *comp_unit = die.GetLLDBCompileUnit(); 3433 if (comp_unit) { 3434 switch (comp_unit->GetLanguage()) { 3435 case eLanguageTypeObjC: 3436 case eLanguageTypeObjC_plus_plus: 3437 if (name && name[0] && 3438 (strcmp(name, "self") == 0 || strcmp(name, "_cmd") == 0)) 3439 skip = true; 3440 break; 3441 default: 3442 break; 3443 } 3444 } 3445 } 3446 } 3447 3448 if (!skip) { 3449 Type *type = die.ResolveTypeUID(DIERef(param_type_die_form)); 3450 if (type) { 3451 function_param_types.push_back(type->GetForwardCompilerType()); 3452 3453 clang::ParmVarDecl *param_var_decl = 3454 m_ast.CreateParameterDeclaration( 3455 name, type->GetForwardCompilerType(), storage); 3456 assert(param_var_decl); 3457 function_param_decls.push_back(param_var_decl); 3458 3459 m_ast.SetMetadataAsUserID(param_var_decl, die.GetID()); 3460 } 3461 } 3462 } 3463 arg_idx++; 3464 } break; 3465 3466 case DW_TAG_unspecified_parameters: 3467 is_variadic = true; 3468 break; 3469 3470 case DW_TAG_template_type_parameter: 3471 case DW_TAG_template_value_parameter: 3472 case DW_TAG_GNU_template_parameter_pack: 3473 // The one caller of this was never using the template_param_infos, 3474 // and the local variable was taking up a large amount of stack space 3475 // in SymbolFileDWARF::ParseType() so this was removed. If we ever need 3476 // the template params back, we can add them back. 3477 // ParseTemplateDIE (dwarf_cu, die, template_param_infos); 3478 has_template_params = true; 3479 break; 3480 3481 default: 3482 break; 3483 } 3484 } 3485 return arg_idx; 3486} 3487 3488void DWARFASTParserClang::ParseChildArrayInfo( 3489 const SymbolContext &sc, const DWARFDIE &parent_die, int64_t &first_index, 3490 std::vector<uint64_t> &element_orders, uint32_t &byte_stride, 3491 uint32_t &bit_stride) { 3492 if (!parent_die) 3493 return; 3494 3495 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 3496 die = die.GetSibling()) { 3497 const dw_tag_t tag = die.Tag(); 3498 switch (tag) { 3499 case DW_TAG_subrange_type: { 3500 DWARFAttributes attributes; 3501 const size_t num_child_attributes = die.GetAttributes(attributes); 3502 if (num_child_attributes > 0) { 3503 uint64_t num_elements = 0; 3504 uint64_t lower_bound = 0; 3505 uint64_t upper_bound = 0; 3506 bool upper_bound_valid = false; 3507 uint32_t i; 3508 for (i = 0; i < num_child_attributes; ++i) { 3509 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3510 DWARFFormValue form_value; 3511 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3512 switch (attr) { 3513 case DW_AT_name: 3514 break; 3515 3516 case DW_AT_count: 3517 num_elements = form_value.Unsigned(); 3518 break; 3519 3520 case DW_AT_bit_stride: 3521 bit_stride = form_value.Unsigned(); 3522 break; 3523 3524 case DW_AT_byte_stride: 3525 byte_stride = form_value.Unsigned(); 3526 break; 3527 3528 case DW_AT_lower_bound: 3529 lower_bound = form_value.Unsigned(); 3530 break; 3531 3532 case DW_AT_upper_bound: 3533 upper_bound_valid = true; 3534 upper_bound = form_value.Unsigned(); 3535 break; 3536 3537 default: 3538 case DW_AT_abstract_origin: 3539 case DW_AT_accessibility: 3540 case DW_AT_allocated: 3541 case DW_AT_associated: 3542 case DW_AT_data_location: 3543 case DW_AT_declaration: 3544 case DW_AT_description: 3545 case DW_AT_sibling: 3546 case DW_AT_threads_scaled: 3547 case DW_AT_type: 3548 case DW_AT_visibility: 3549 break; 3550 } 3551 } 3552 } 3553 3554 if (num_elements == 0) { 3555 if (upper_bound_valid && upper_bound >= lower_bound) 3556 num_elements = upper_bound - lower_bound + 1; 3557 } 3558 3559 element_orders.push_back(num_elements); 3560 } 3561 } break; 3562 } 3563 } 3564} 3565 3566Type *DWARFASTParserClang::GetTypeForDIE(const DWARFDIE &die) { 3567 if (die) { 3568 SymbolFileDWARF *dwarf = die.GetDWARF(); 3569 DWARFAttributes attributes; 3570 const size_t num_attributes = die.GetAttributes(attributes); 3571 if (num_attributes > 0) { 3572 DWARFFormValue type_die_form; 3573 for (size_t i = 0; i < num_attributes; ++i) { 3574 dw_attr_t attr = attributes.AttributeAtIndex(i); 3575 DWARFFormValue form_value; 3576 3577 if (attr == DW_AT_type && 3578 attributes.ExtractFormValueAtIndex(i, form_value)) 3579 return dwarf->ResolveTypeUID(dwarf->GetDIE(DIERef(form_value)), true); 3580 } 3581 } 3582 } 3583 3584 return nullptr; 3585} 3586 3587clang::Decl *DWARFASTParserClang::GetClangDeclForDIE(const DWARFDIE &die) { 3588 if (!die) 3589 return nullptr; 3590 3591 switch (die.Tag()) { 3592 case DW_TAG_variable: 3593 case DW_TAG_constant: 3594 case DW_TAG_formal_parameter: 3595 case DW_TAG_imported_declaration: 3596 case DW_TAG_imported_module: 3597 break; 3598 default: 3599 return nullptr; 3600 } 3601 3602 DIEToDeclMap::iterator cache_pos = m_die_to_decl.find(die.GetDIE()); 3603 if (cache_pos != m_die_to_decl.end()) 3604 return cache_pos->second; 3605 3606 if (DWARFDIE spec_die = die.GetReferencedDIE(DW_AT_specification)) { 3607 clang::Decl *decl = GetClangDeclForDIE(spec_die); 3608 m_die_to_decl[die.GetDIE()] = decl; 3609 m_decl_to_die[decl].insert(die.GetDIE()); 3610 return decl; 3611 } 3612 3613 if (DWARFDIE abstract_origin_die = 3614 die.GetReferencedDIE(DW_AT_abstract_origin)) { 3615 clang::Decl *decl = GetClangDeclForDIE(abstract_origin_die); 3616 m_die_to_decl[die.GetDIE()] = decl; 3617 m_decl_to_die[decl].insert(die.GetDIE()); 3618 return decl; 3619 } 3620 3621 clang::Decl *decl = nullptr; 3622 switch (die.Tag()) { 3623 case DW_TAG_variable: 3624 case DW_TAG_constant: 3625 case DW_TAG_formal_parameter: { 3626 SymbolFileDWARF *dwarf = die.GetDWARF(); 3627 Type *type = GetTypeForDIE(die); 3628 if (dwarf && type) { 3629 const char *name = die.GetName(); 3630 clang::DeclContext *decl_context = 3631 ClangASTContext::DeclContextGetAsDeclContext( 3632 dwarf->GetDeclContextContainingUID(die.GetID())); 3633 decl = m_ast.CreateVariableDeclaration( 3634 decl_context, name, 3635 ClangUtil::GetQualType(type->GetForwardCompilerType())); 3636 } 3637 break; 3638 } 3639 case DW_TAG_imported_declaration: { 3640 SymbolFileDWARF *dwarf = die.GetDWARF(); 3641 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3642 if (imported_uid) { 3643 CompilerDecl imported_decl = imported_uid.GetDecl(); 3644 if (imported_decl) { 3645 clang::DeclContext *decl_context = 3646 ClangASTContext::DeclContextGetAsDeclContext( 3647 dwarf->GetDeclContextContainingUID(die.GetID())); 3648 if (clang::NamedDecl *clang_imported_decl = 3649 llvm::dyn_cast<clang::NamedDecl>( 3650 (clang::Decl *)imported_decl.GetOpaqueDecl())) 3651 decl = 3652 m_ast.CreateUsingDeclaration(decl_context, clang_imported_decl); 3653 } 3654 } 3655 break; 3656 } 3657 case DW_TAG_imported_module: { 3658 SymbolFileDWARF *dwarf = die.GetDWARF(); 3659 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3660 3661 if (imported_uid) { 3662 CompilerDeclContext imported_decl_ctx = imported_uid.GetDeclContext(); 3663 if (imported_decl_ctx) { 3664 clang::DeclContext *decl_context = 3665 ClangASTContext::DeclContextGetAsDeclContext( 3666 dwarf->GetDeclContextContainingUID(die.GetID())); 3667 if (clang::NamespaceDecl *ns_decl = 3668 ClangASTContext::DeclContextGetAsNamespaceDecl( 3669 imported_decl_ctx)) 3670 decl = m_ast.CreateUsingDirectiveDeclaration(decl_context, ns_decl); 3671 } 3672 } 3673 break; 3674 } 3675 default: 3676 break; 3677 } 3678 3679 m_die_to_decl[die.GetDIE()] = decl; 3680 m_decl_to_die[decl].insert(die.GetDIE()); 3681 3682 return decl; 3683} 3684 3685clang::DeclContext * 3686DWARFASTParserClang::GetClangDeclContextForDIE(const DWARFDIE &die) { 3687 if (die) { 3688 clang::DeclContext *decl_ctx = GetCachedClangDeclContextForDIE(die); 3689 if (decl_ctx) 3690 return decl_ctx; 3691 3692 bool try_parsing_type = true; 3693 switch (die.Tag()) { 3694 case DW_TAG_compile_unit: 3695 decl_ctx = m_ast.GetTranslationUnitDecl(); 3696 try_parsing_type = false; 3697 break; 3698 3699 case DW_TAG_namespace: 3700 decl_ctx = ResolveNamespaceDIE(die); 3701 try_parsing_type = false; 3702 break; 3703 3704 case DW_TAG_lexical_block: 3705 decl_ctx = GetDeclContextForBlock(die); 3706 try_parsing_type = false; 3707 break; 3708 3709 default: 3710 break; 3711 } 3712 3713 if (decl_ctx == nullptr && try_parsing_type) { 3714 Type *type = die.GetDWARF()->ResolveType(die); 3715 if (type) 3716 decl_ctx = GetCachedClangDeclContextForDIE(die); 3717 } 3718 3719 if (decl_ctx) { 3720 LinkDeclContextToDIE(decl_ctx, die); 3721 return decl_ctx; 3722 } 3723 } 3724 return nullptr; 3725} 3726 3727static bool IsSubroutine(const DWARFDIE &die) { 3728 switch (die.Tag()) { 3729 case DW_TAG_subprogram: 3730 case DW_TAG_inlined_subroutine: 3731 return true; 3732 default: 3733 return false; 3734 } 3735} 3736 3737static DWARFDIE GetContainingFunctionWithAbstractOrigin(const DWARFDIE &die) { 3738 for (DWARFDIE candidate = die; candidate; candidate = candidate.GetParent()) { 3739 if (IsSubroutine(candidate)) { 3740 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3741 return candidate; 3742 } else { 3743 return DWARFDIE(); 3744 } 3745 } 3746 } 3747 assert(0 && "Shouldn't call GetContainingFunctionWithAbstractOrigin on " 3748 "something not in a function"); 3749 return DWARFDIE(); 3750} 3751 3752static DWARFDIE FindAnyChildWithAbstractOrigin(const DWARFDIE &context) { 3753 for (DWARFDIE candidate = context.GetFirstChild(); candidate.IsValid(); 3754 candidate = candidate.GetSibling()) { 3755 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3756 return candidate; 3757 } 3758 } 3759 return DWARFDIE(); 3760} 3761 3762static DWARFDIE FindFirstChildWithAbstractOrigin(const DWARFDIE &block, 3763 const DWARFDIE &function) { 3764 assert(IsSubroutine(function)); 3765 for (DWARFDIE context = block; context != function.GetParent(); 3766 context = context.GetParent()) { 3767 assert(!IsSubroutine(context) || context == function); 3768 if (DWARFDIE child = FindAnyChildWithAbstractOrigin(context)) { 3769 return child; 3770 } 3771 } 3772 return DWARFDIE(); 3773} 3774 3775clang::DeclContext * 3776DWARFASTParserClang::GetDeclContextForBlock(const DWARFDIE &die) { 3777 assert(die.Tag() == DW_TAG_lexical_block); 3778 DWARFDIE containing_function_with_abstract_origin = 3779 GetContainingFunctionWithAbstractOrigin(die); 3780 if (!containing_function_with_abstract_origin) { 3781 return (clang::DeclContext *)ResolveBlockDIE(die); 3782 } 3783 DWARFDIE child = FindFirstChildWithAbstractOrigin( 3784 die, containing_function_with_abstract_origin); 3785 CompilerDeclContext decl_context = 3786 GetDeclContextContainingUIDFromDWARF(child); 3787 return (clang::DeclContext *)decl_context.GetOpaqueDeclContext(); 3788} 3789 3790clang::BlockDecl *DWARFASTParserClang::ResolveBlockDIE(const DWARFDIE &die) { 3791 if (die && die.Tag() == DW_TAG_lexical_block) { 3792 clang::BlockDecl *decl = 3793 llvm::cast_or_null<clang::BlockDecl>(m_die_to_decl_ctx[die.GetDIE()]); 3794 3795 if (!decl) { 3796 DWARFDIE decl_context_die; 3797 clang::DeclContext *decl_context = 3798 GetClangDeclContextContainingDIE(die, &decl_context_die); 3799 decl = m_ast.CreateBlockDeclaration(decl_context); 3800 3801 if (decl) 3802 LinkDeclContextToDIE((clang::DeclContext *)decl, die); 3803 } 3804 3805 return decl; 3806 } 3807 return nullptr; 3808} 3809 3810clang::NamespaceDecl * 3811DWARFASTParserClang::ResolveNamespaceDIE(const DWARFDIE &die) { 3812 if (die && die.Tag() == DW_TAG_namespace) { 3813 // See if we already parsed this namespace DIE and associated it with a 3814 // uniqued namespace declaration 3815 clang::NamespaceDecl *namespace_decl = 3816 static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die.GetDIE()]); 3817 if (namespace_decl) 3818 return namespace_decl; 3819 else { 3820 const char *namespace_name = die.GetName(); 3821 clang::DeclContext *containing_decl_ctx = 3822 GetClangDeclContextContainingDIE(die, nullptr); 3823 namespace_decl = m_ast.GetUniqueNamespaceDeclaration(namespace_name, 3824 containing_decl_ctx); 3825 Log *log = 3826 nullptr; // (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 3827 if (log) { 3828 SymbolFileDWARF *dwarf = die.GetDWARF(); 3829 if (namespace_name) { 3830 dwarf->GetObjectFile()->GetModule()->LogMessage( 3831 log, "ASTContext => %p: 0x%8.8" PRIx64 3832 ": DW_TAG_namespace with DW_AT_name(\"%s\") => " 3833 "clang::NamespaceDecl *%p (original = %p)", 3834 static_cast<void *>(m_ast.getASTContext()), die.GetID(), 3835 namespace_name, static_cast<void *>(namespace_decl), 3836 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3837 } else { 3838 dwarf->GetObjectFile()->GetModule()->LogMessage( 3839 log, "ASTContext => %p: 0x%8.8" PRIx64 3840 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p " 3841 "(original = %p)", 3842 static_cast<void *>(m_ast.getASTContext()), die.GetID(), 3843 static_cast<void *>(namespace_decl), 3844 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3845 } 3846 } 3847 3848 if (namespace_decl) 3849 LinkDeclContextToDIE((clang::DeclContext *)namespace_decl, die); 3850 return namespace_decl; 3851 } 3852 } 3853 return nullptr; 3854} 3855 3856clang::DeclContext *DWARFASTParserClang::GetClangDeclContextContainingDIE( 3857 const DWARFDIE &die, DWARFDIE *decl_ctx_die_copy) { 3858 SymbolFileDWARF *dwarf = die.GetDWARF(); 3859 3860 DWARFDIE decl_ctx_die = dwarf->GetDeclContextDIEContainingDIE(die); 3861 3862 if (decl_ctx_die_copy) 3863 *decl_ctx_die_copy = decl_ctx_die; 3864 3865 if (decl_ctx_die) { 3866 clang::DeclContext *clang_decl_ctx = 3867 GetClangDeclContextForDIE(decl_ctx_die); 3868 if (clang_decl_ctx) 3869 return clang_decl_ctx; 3870 } 3871 return m_ast.GetTranslationUnitDecl(); 3872} 3873 3874clang::DeclContext * 3875DWARFASTParserClang::GetCachedClangDeclContextForDIE(const DWARFDIE &die) { 3876 if (die) { 3877 DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find(die.GetDIE()); 3878 if (pos != m_die_to_decl_ctx.end()) 3879 return pos->second; 3880 } 3881 return nullptr; 3882} 3883 3884void DWARFASTParserClang::LinkDeclContextToDIE(clang::DeclContext *decl_ctx, 3885 const DWARFDIE &die) { 3886 m_die_to_decl_ctx[die.GetDIE()] = decl_ctx; 3887 // There can be many DIEs for a single decl context 3888 // m_decl_ctx_to_die[decl_ctx].insert(die.GetDIE()); 3889 m_decl_ctx_to_die.insert(std::make_pair(decl_ctx, die)); 3890} 3891 3892bool DWARFASTParserClang::CopyUniqueClassMethodTypes( 3893 const DWARFDIE &src_class_die, const DWARFDIE &dst_class_die, 3894 lldb_private::Type *class_type, DWARFDIECollection &failures) { 3895 if (!class_type || !src_class_die || !dst_class_die) 3896 return false; 3897 if (src_class_die.Tag() != dst_class_die.Tag()) 3898 return false; 3899 3900 // We need to complete the class type so we can get all of the method types 3901 // parsed so we can then unique those types to their equivalent counterparts 3902 // in "dst_cu" and "dst_class_die" 3903 class_type->GetFullCompilerType(); 3904 3905 DWARFDIE src_die; 3906 DWARFDIE dst_die; 3907 UniqueCStringMap<DWARFDIE> src_name_to_die; 3908 UniqueCStringMap<DWARFDIE> dst_name_to_die; 3909 UniqueCStringMap<DWARFDIE> src_name_to_die_artificial; 3910 UniqueCStringMap<DWARFDIE> dst_name_to_die_artificial; 3911 for (src_die = src_class_die.GetFirstChild(); src_die.IsValid(); 3912 src_die = src_die.GetSibling()) { 3913 if (src_die.Tag() == DW_TAG_subprogram) { 3914 // Make sure this is a declaration and not a concrete instance by looking 3915 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3916 // are placed inside the class definitions and shouldn't be included in 3917 // the list of things are are tracking here. 3918 if (src_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 3919 const char *src_name = src_die.GetMangledName(); 3920 if (src_name) { 3921 ConstString src_const_name(src_name); 3922 if (src_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3923 src_name_to_die_artificial.Append(src_const_name, src_die); 3924 else 3925 src_name_to_die.Append(src_const_name, src_die); 3926 } 3927 } 3928 } 3929 } 3930 for (dst_die = dst_class_die.GetFirstChild(); dst_die.IsValid(); 3931 dst_die = dst_die.GetSibling()) { 3932 if (dst_die.Tag() == DW_TAG_subprogram) { 3933 // Make sure this is a declaration and not a concrete instance by looking 3934 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3935 // are placed inside the class definitions and shouldn't be included in 3936 // the list of things are are tracking here. 3937 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 3938 const char *dst_name = dst_die.GetMangledName(); 3939 if (dst_name) { 3940 ConstString dst_const_name(dst_name); 3941 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3942 dst_name_to_die_artificial.Append(dst_const_name, dst_die); 3943 else 3944 dst_name_to_die.Append(dst_const_name, dst_die); 3945 } 3946 } 3947 } 3948 } 3949 const uint32_t src_size = src_name_to_die.GetSize(); 3950 const uint32_t dst_size = dst_name_to_die.GetSize(); 3951 Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | 3952 // DWARF_LOG_TYPE_COMPLETION)); 3953 3954 // Is everything kosher so we can go through the members at top speed? 3955 bool fast_path = true; 3956 3957 if (src_size != dst_size) { 3958 if (src_size != 0 && dst_size != 0) { 3959 if (log) 3960 log->Printf("warning: trying to unique class DIE 0x%8.8x to 0x%8.8x, " 3961 "but they didn't have the same size (src=%d, dst=%d)", 3962 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3963 src_size, dst_size); 3964 } 3965 3966 fast_path = false; 3967 } 3968 3969 uint32_t idx; 3970 3971 if (fast_path) { 3972 for (idx = 0; idx < src_size; ++idx) { 3973 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 3974 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3975 3976 if (src_die.Tag() != dst_die.Tag()) { 3977 if (log) 3978 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 3979 "but 0x%8.8x (%s) tags didn't match 0x%8.8x (%s)", 3980 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3981 src_die.GetOffset(), src_die.GetTagAsCString(), 3982 dst_die.GetOffset(), dst_die.GetTagAsCString()); 3983 fast_path = false; 3984 } 3985 3986 const char *src_name = src_die.GetMangledName(); 3987 const char *dst_name = dst_die.GetMangledName(); 3988 3989 // Make sure the names match 3990 if (src_name == dst_name || (strcmp(src_name, dst_name) == 0)) 3991 continue; 3992 3993 if (log) 3994 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 3995 "but 0x%8.8x (%s) names didn't match 0x%8.8x (%s)", 3996 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3997 src_die.GetOffset(), src_name, dst_die.GetOffset(), 3998 dst_name); 3999 4000 fast_path = false; 4001 } 4002 } 4003 4004 DWARFASTParserClang *src_dwarf_ast_parser = 4005 (DWARFASTParserClang *)src_die.GetDWARFParser(); 4006 DWARFASTParserClang *dst_dwarf_ast_parser = 4007 (DWARFASTParserClang *)dst_die.GetDWARFParser(); 4008 4009 // Now do the work of linking the DeclContexts and Types. 4010 if (fast_path) { 4011 // We can do this quickly. Just run across the tables index-for-index since 4012 // we know each node has matching names and tags. 4013 for (idx = 0; idx < src_size; ++idx) { 4014 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 4015 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 4016 4017 clang::DeclContext *src_decl_ctx = 4018 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4019 if (src_decl_ctx) { 4020 if (log) 4021 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4022 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 4023 dst_die.GetOffset()); 4024 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 4025 } else { 4026 if (log) 4027 log->Printf("warning: tried to unique decl context from 0x%8.8x for " 4028 "0x%8.8x, but none was found", 4029 src_die.GetOffset(), dst_die.GetOffset()); 4030 } 4031 4032 Type *src_child_type = 4033 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4034 if (src_child_type) { 4035 if (log) 4036 log->Printf( 4037 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 4038 static_cast<void *>(src_child_type), src_child_type->GetID(), 4039 src_die.GetOffset(), dst_die.GetOffset()); 4040 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 4041 } else { 4042 if (log) 4043 log->Printf("warning: tried to unique lldb_private::Type from " 4044 "0x%8.8x for 0x%8.8x, but none was found", 4045 src_die.GetOffset(), dst_die.GetOffset()); 4046 } 4047 } 4048 } else { 4049 // We must do this slowly. For each member of the destination, look 4050 // up a member in the source with the same name, check its tag, and 4051 // unique them if everything matches up. Report failures. 4052 4053 if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty()) { 4054 src_name_to_die.Sort(); 4055 4056 for (idx = 0; idx < dst_size; ++idx) { 4057 ConstString dst_name = dst_name_to_die.GetCStringAtIndex(idx); 4058 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 4059 src_die = src_name_to_die.Find(dst_name, DWARFDIE()); 4060 4061 if (src_die && (src_die.Tag() == dst_die.Tag())) { 4062 clang::DeclContext *src_decl_ctx = 4063 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4064 if (src_decl_ctx) { 4065 if (log) 4066 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4067 static_cast<void *>(src_decl_ctx), 4068 src_die.GetOffset(), dst_die.GetOffset()); 4069 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 4070 } else { 4071 if (log) 4072 log->Printf("warning: tried to unique decl context from 0x%8.8x " 4073 "for 0x%8.8x, but none was found", 4074 src_die.GetOffset(), dst_die.GetOffset()); 4075 } 4076 4077 Type *src_child_type = 4078 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4079 if (src_child_type) { 4080 if (log) 4081 log->Printf("uniquing type %p (uid=0x%" PRIx64 4082 ") from 0x%8.8x for 0x%8.8x", 4083 static_cast<void *>(src_child_type), 4084 src_child_type->GetID(), src_die.GetOffset(), 4085 dst_die.GetOffset()); 4086 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = 4087 src_child_type; 4088 } else { 4089 if (log) 4090 log->Printf("warning: tried to unique lldb_private::Type from " 4091 "0x%8.8x for 0x%8.8x, but none was found", 4092 src_die.GetOffset(), dst_die.GetOffset()); 4093 } 4094 } else { 4095 if (log) 4096 log->Printf("warning: couldn't find a match for 0x%8.8x", 4097 dst_die.GetOffset()); 4098 4099 failures.Append(dst_die); 4100 } 4101 } 4102 } 4103 } 4104 4105 const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize(); 4106 const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize(); 4107 4108 if (src_size_artificial && dst_size_artificial) { 4109 dst_name_to_die_artificial.Sort(); 4110 4111 for (idx = 0; idx < src_size_artificial; ++idx) { 4112 ConstString src_name_artificial = 4113 src_name_to_die_artificial.GetCStringAtIndex(idx); 4114 src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 4115 dst_die = 4116 dst_name_to_die_artificial.Find(src_name_artificial, DWARFDIE()); 4117 4118 if (dst_die) { 4119 // Both classes have the artificial types, link them 4120 clang::DeclContext *src_decl_ctx = 4121 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4122 if (src_decl_ctx) { 4123 if (log) 4124 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4125 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 4126 dst_die.GetOffset()); 4127 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 4128 } else { 4129 if (log) 4130 log->Printf("warning: tried to unique decl context from 0x%8.8x " 4131 "for 0x%8.8x, but none was found", 4132 src_die.GetOffset(), dst_die.GetOffset()); 4133 } 4134 4135 Type *src_child_type = 4136 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4137 if (src_child_type) { 4138 if (log) 4139 log->Printf( 4140 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 4141 static_cast<void *>(src_child_type), src_child_type->GetID(), 4142 src_die.GetOffset(), dst_die.GetOffset()); 4143 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 4144 } else { 4145 if (log) 4146 log->Printf("warning: tried to unique lldb_private::Type from " 4147 "0x%8.8x for 0x%8.8x, but none was found", 4148 src_die.GetOffset(), dst_die.GetOffset()); 4149 } 4150 } 4151 } 4152 } 4153 4154 if (dst_size_artificial) { 4155 for (idx = 0; idx < dst_size_artificial; ++idx) { 4156 ConstString dst_name_artificial = 4157 dst_name_to_die_artificial.GetCStringAtIndex(idx); 4158 dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 4159 if (log) 4160 log->Printf("warning: need to create artificial method for 0x%8.8x for " 4161 "method '%s'", 4162 dst_die.GetOffset(), dst_name_artificial.GetCString()); 4163 4164 failures.Append(dst_die); 4165 } 4166 } 4167 4168 return (failures.Size() != 0); 4169} 4170