DWARFASTParserClang.cpp revision 321369
12088Ssos//===-- DWARFASTParserClang.cpp ---------------------------------*- C++ -*-===// 25536Ssos// 32088Ssos// The LLVM Compiler Infrastructure 42088Ssos// 52088Ssos// This file is distributed under the University of Illinois Open Source 62088Ssos// License. See LICENSE.TXT for details. 72088Ssos// 82088Ssos//===----------------------------------------------------------------------===// 95994Ssos 105994Ssos#include <stdlib.h> 112088Ssos 122088Ssos#include "DWARFASTParserClang.h" 132088Ssos#include "DWARFCompileUnit.h" 142088Ssos#include "DWARFDIE.h" 1597748Sschweikh#include "DWARFDIECollection.h" 162088Ssos#include "DWARFDebugInfo.h" 172088Ssos#include "DWARFDeclContext.h" 182088Ssos#include "DWARFDefines.h" 192088Ssos#include "SymbolFileDWARF.h" 202088Ssos#include "SymbolFileDWARFDebugMap.h" 212088Ssos#include "UniqueDWARFASTType.h" 222088Ssos 232088Ssos#include "Plugins/Language/ObjC/ObjCLanguage.h" 242088Ssos#include "lldb/Core/Module.h" 252088Ssos#include "lldb/Core/Value.h" 262088Ssos#include "lldb/Host/Host.h" 272088Ssos#include "lldb/Interpreter/Args.h" 282088Ssos#include "lldb/Symbol/ClangASTImporter.h" 29114601Sobrien#include "lldb/Symbol/ClangExternalASTSourceCommon.h" 30114601Sobrien#include "lldb/Symbol/ClangUtil.h" 3129603Scharnier#include "lldb/Symbol/CompileUnit.h" 322088Ssos#include "lldb/Symbol/Function.h" 3329603Scharnier#include "lldb/Symbol/ObjectFile.h" 342088Ssos#include "lldb/Symbol/SymbolVendor.h" 3529603Scharnier#include "lldb/Symbol/TypeList.h" 363864Sswallace#include "lldb/Symbol/TypeMap.h" 3729603Scharnier#include "lldb/Target/Language.h" 3842505Syokota#include "lldb/Utility/LLDBAssert.h" 3966834Sphk#include "lldb/Utility/Log.h" 4066834Sphk#include "lldb/Utility/StreamString.h" 412088Ssos 422088Ssos#include "clang/AST/DeclCXX.h" 432088Ssos#include "clang/AST/DeclObjC.h" 4476643Simp 4590394Sru#include <map> 4690394Sru#include <vector> 4776643Simp 4890394Sru//#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN 4990394Sru 5090394Sru#ifdef ENABLE_DEBUG_PRINTF 5190394Sru#include <stdio.h> 5290394Sru#define DEBUG_PRINTF(fmt, ...) printf(fmt, __VA_ARGS__) 5390394Sru#else 5476643Simp#define DEBUG_PRINTF(fmt, ...) 5576643Simp#endif 5676643Simp 5776643Simpusing namespace lldb; 58196500Sedusing namespace lldb_private; 59196500SedDWARFASTParserClang::DWARFASTParserClang(ClangASTContext &ast) 602088Ssos : m_ast(ast), m_die_to_decl_ctx(), m_decl_ctx_to_die() {} 618857Srgrimes 622088SsosDWARFASTParserClang::~DWARFASTParserClang() {} 632088Ssos 6438139Syokotastatic AccessType DW_ACCESS_to_AccessType(uint32_t dwarf_accessibility) { 652088Ssos switch (dwarf_accessibility) { 662088Ssos case DW_ACCESS_public: 6732316Syokota return eAccessPublic; 6832316Syokota case DW_ACCESS_private: 6932316Syokota return eAccessPrivate; 7032316Syokota case DW_ACCESS_protected: 7132316Syokota return eAccessProtected; 7232316Syokota default: 7332316Syokota break; 7432316Syokota } 7532316Syokota return eAccessNone; 7632316Syokota} 7732316Syokota 7832316Syokotastatic bool DeclKindIsCXXClass(clang::Decl::Kind decl_kind) { 795994Ssos switch (decl_kind) { 805994Ssos case clang::Decl::CXXRecord: 815994Ssos case clang::Decl::ClassTemplateSpecialization: 825994Ssos return true; 835994Ssos default: 845994Ssos break; 855994Ssos } 865994Ssos return false; 875994Ssos} 885994Ssos 895994Ssosstruct BitfieldInfo { 905994Ssos uint64_t bit_size; 919202Srgrimes uint64_t bit_offset; 925994Ssos 935994Ssos BitfieldInfo() 945994Ssos : bit_size(LLDB_INVALID_ADDRESS), bit_offset(LLDB_INVALID_ADDRESS) {} 959202Srgrimes 965994Ssos void Clear() { 975994Ssos bit_size = LLDB_INVALID_ADDRESS; 985994Ssos bit_offset = LLDB_INVALID_ADDRESS; 995994Ssos } 1005994Ssos 1015994Ssos bool IsValid() const { 1025994Ssos return (bit_size != LLDB_INVALID_ADDRESS) && 1035994Ssos (bit_offset != LLDB_INVALID_ADDRESS); 1042088Ssos } 1052088Ssos 10646761Syokota bool NextBitfieldOffsetIsValid(const uint64_t next_bit_offset) const { 10746761Syokota if (IsValid()) { 10846761Syokota // This bitfield info is valid, so any subsequent bitfields 10946761Syokota // must not overlap and must be at a higher bit offset than 11046761Syokota // any previous bitfield + size. 11146761Syokota return (bit_size + bit_offset) <= next_bit_offset; 11246761Syokota } else { 1132088Ssos // If the this BitfieldInfo is not valid, then any offset isOK 1146046Ssos return true; 1152088Ssos } 11632316Syokota } 1172088Ssos}; 11899816Salfred 11999816SalfredClangASTImporter &DWARFASTParserClang::GetClangASTImporter() { 12099816Salfred if (!m_clang_ast_importer_ap) { 12199814Salfred m_clang_ast_importer_ap.reset(new ClangASTImporter); 12299816Salfred } 12399814Salfred return *m_clang_ast_importer_ap; 12499816Salfred} 12599816Salfred 12699816SalfredTypeSP DWARFASTParserClang::ParseTypeFromDWO(const DWARFDIE &die, Log *log) { 12799816Salfred ModuleSP dwo_module_sp = die.GetContainingDWOModule(); 12899816Salfred if (dwo_module_sp) { 12999816Salfred // This type comes from an external DWO module 13099816Salfred std::vector<CompilerContext> dwo_context; 13199816Salfred die.GetDWOContext(dwo_context); 13299816Salfred TypeMap dwo_types; 13399816Salfred if (dwo_module_sp->GetSymbolVendor()->FindTypes(dwo_context, true, 13499816Salfred dwo_types)) { 135162327Semax const size_t num_dwo_types = dwo_types.GetSize(); 13699816Salfred if (num_dwo_types == 1) { 13799816Salfred // We found a real definition for this type elsewhere 13899816Salfred // so lets use it and cache the fact that we found 13999816Salfred // a complete type for this die 14099816Salfred TypeSP dwo_type_sp = dwo_types.GetTypeAtIndex(0); 14199816Salfred if (dwo_type_sp) { 1422088Ssos lldb_private::CompilerType dwo_type = 1432088Ssos dwo_type_sp->GetForwardCompilerType(); 1442088Ssos 1452088Ssos lldb_private::CompilerType type = 1462088Ssos GetClangASTImporter().CopyType(m_ast, dwo_type); 1472088Ssos 14829603Scharnier // printf ("copied_qual_type: ast = %p, clang_type = %p, name = 1492088Ssos // '%s'\n", m_ast, copied_qual_type.getAsOpaquePtr(), 1502088Ssos // external_type->GetName().GetCString()); 1512088Ssos if (type) { 1522088Ssos SymbolFileDWARF *dwarf = die.GetDWARF(); 1532088Ssos TypeSP type_sp(new Type(die.GetID(), dwarf, dwo_type_sp->GetName(), 1542088Ssos dwo_type_sp->GetByteSize(), NULL, 1552088Ssos LLDB_INVALID_UID, Type::eEncodingInvalid, 1565536Ssos &dwo_type_sp->GetDeclaration(), type, 1575536Ssos Type::eResolveStateForward)); 1585536Ssos 1592088Ssos dwarf->GetTypeList()->Insert(type_sp); 1602088Ssos dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 16177394Ssobomax clang::TagDecl *tag_decl = ClangASTContext::GetAsTagDecl(type); 1622088Ssos if (tag_decl) 1632088Ssos LinkDeclContextToDIE(tag_decl, die); 1642088Ssos else { 1652088Ssos clang::DeclContext *defn_decl_ctx = 16677394Ssobomax GetCachedClangDeclContextForDIE(die); 1672088Ssos if (defn_decl_ctx) 1682088Ssos LinkDeclContextToDIE(defn_decl_ctx, die); 1692088Ssos } 1702088Ssos return type_sp; 1712088Ssos } 1722088Ssos } 1732088Ssos } 1742088Ssos } 1752088Ssos } 1762088Ssos return TypeSP(); 1772088Ssos} 1782088Ssos 1792088SsosTypeSP DWARFASTParserClang::ParseTypeFromDWARF(const SymbolContext &sc, 1802088Ssos const DWARFDIE &die, Log *log, 18199816Salfred bool *type_is_new_ptr) { 1822088Ssos TypeSP type_sp; 18332316Syokota 1842088Ssos if (type_is_new_ptr) 185196500Sed *type_is_new_ptr = false; 1862088Ssos 187196500Sed AccessType accessibility = eAccessNone; 1882088Ssos if (die) { 189196500Sed SymbolFileDWARF *dwarf = die.GetDWARF(); 1902088Ssos if (log) { 191196500Sed DWARFDIE context_die; 1922088Ssos clang::DeclContext *context = 193196500Sed GetClangDeclContextContainingDIE(die, &context_die); 1942088Ssos 195196500Sed dwarf->GetObjectFile()->GetModule()->LogMessage( 1962088Ssos log, "SymbolFileDWARF::ParseType (die = 0x%8.8x, decl_ctx = %p (die " 197196500Sed "0x%8.8x)) %s name = '%s')", 1982088Ssos die.GetOffset(), static_cast<void *>(context), 199196500Sed context_die.GetOffset(), die.GetTagAsCString(), die.GetName()); 2002088Ssos } 201196500Sed // 2022088Ssos // Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 203196500Sed // if (log && dwarf_cu) 20448105Syokota // { 205196500Sed // StreamString s; 2062088Ssos // die->DumpLocation (this, dwarf_cu, s); 207196500Sed // dwarf->GetObjectFile()->GetModule()->LogMessage (log, 2082088Ssos // "SymbolFileDwarf::%s %s", __FUNCTION__, s.GetData()); 209196500Sed // 2102088Ssos // } 211196500Sed 2122088Ssos Type *type_ptr = dwarf->GetDIEToType().lookup(die.GetDIE()); 213196500Sed TypeList *type_list = dwarf->GetTypeList(); 2142088Ssos if (type_ptr == NULL) { 215196500Sed if (type_is_new_ptr) 2162088Ssos *type_is_new_ptr = true; 217196500Sed 2182088Ssos const dw_tag_t tag = die.Tag(); 219196500Sed 2205994Ssos bool is_forward_declaration = false; 221196500Sed DWARFAttributes attributes; 22238053Syokota const char *type_name_cstr = NULL; 223196500Sed ConstString type_name_const_str; 22454380Syokota Type::ResolveState resolve_state = Type::eResolveStateUnresolved; 225196500Sed uint64_t byte_size = 0; 22654380Syokota Declaration decl; 227196500Sed 22854380Syokota Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID; 229196500Sed CompilerType clang_type; 23054380Syokota DWARFFormValue form_value; 231196500Sed 23254380Syokota dw_attr_t attr; 233196500Sed 23454380Syokota switch (tag) { 235196500Sed case DW_TAG_typedef: 23654380Syokota case DW_TAG_base_type: 237196500Sed case DW_TAG_pointer_type: 23865759Sdwmalone case DW_TAG_reference_type: 239196500Sed case DW_TAG_rvalue_reference_type: 24065759Sdwmalone case DW_TAG_const_type: 241196500Sed case DW_TAG_restrict_type: 24274118Sache case DW_TAG_volatile_type: 243196500Sed case DW_TAG_unspecified_type: { 24432316Syokota // Set a bit that lets us know that we are currently parsing this 24532316Syokota dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 24632316Syokota 247196500Sed const size_t num_attributes = die.GetAttributes(attributes); 2482088Ssos uint32_t encoding = 0; 2492088Ssos DWARFFormValue encoding_uid; 2502088Ssos 251196500Sed if (num_attributes > 0) { 2522088Ssos uint32_t i; 2532088Ssos for (i = 0; i < num_attributes; ++i) { 2542088Ssos attr = attributes.AttributeAtIndex(i); 255196500Sed if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2562088Ssos switch (attr) { 2572088Ssos case DW_AT_decl_file: 2582088Ssos decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 259197330Sed form_value.Unsigned())); 2602088Ssos break; 2612088Ssos case DW_AT_decl_line: 2622088Ssos decl.SetLine(form_value.Unsigned()); 2632088Ssos break; 2642088Ssos case DW_AT_decl_column: 2652088Ssos decl.SetColumn(form_value.Unsigned()); 2662088Ssos break; 26777394Ssobomax case DW_AT_name: 26832316Syokota 2692088Ssos type_name_cstr = form_value.AsCString(); 27032316Syokota // Work around a bug in llvm-gcc where they give a name to a 2712088Ssos // reference type which doesn't 2722088Ssos // include the "&"... 2732088Ssos if (tag == DW_TAG_reference_type) { 27432316Syokota if (strchr(type_name_cstr, '&') == NULL) 27532316Syokota type_name_cstr = NULL; 27632316Syokota } 27732316Syokota if (type_name_cstr) 27832316Syokota type_name_const_str.SetCString(type_name_cstr); 27932316Syokota break; 28032316Syokota case DW_AT_byte_size: 28132316Syokota byte_size = form_value.Unsigned(); 28232316Syokota break; 28332316Syokota case DW_AT_encoding: 28432316Syokota encoding = form_value.Unsigned(); 28532316Syokota break; 28632316Syokota case DW_AT_type: 28732316Syokota encoding_uid = form_value; 28832316Syokota break; 28932316Syokota default: 29032316Syokota case DW_AT_sibling: 29132316Syokota break; 29232316Syokota } 2932088Ssos } 29432316Syokota } 29532316Syokota } 29632316Syokota 29732316Syokota if (tag == DW_TAG_typedef && encoding_uid.IsValid()) { 29832316Syokota // Try to parse a typedef from the DWO file first as modules 29932316Syokota // can contain typedef'ed structures that have no names like: 30032316Syokota // 30132316Syokota // typedef struct { int a; } Foo; 30232316Syokota // 30332316Syokota // In this case we will have a structure with no name and a 30432316Syokota // typedef named "Foo" that points to this unnamed structure. 30532316Syokota // The name in the typedef is the only identifier for the struct, 3062088Ssos // so always try to get typedefs from DWO files if possible. 3072088Ssos // 3082088Ssos // The type_sp returned will be empty if the typedef doesn't exist 3092088Ssos // in a DWO file, so it is cheap to call this function just to check. 3102088Ssos // 3112088Ssos // If we don't do this we end up creating a TypeSP that says this 3122088Ssos // is a typedef to type 0x123 (the DW_AT_type value would be 0x123 3132088Ssos // in the DW_TAG_typedef), and this is the unnamed structure type. 3142088Ssos // We will have a hard time tracking down an unnammed structure 315196500Sed // type in the module DWO file, so we make sure we don't get into 3162088Ssos // this situation by always resolving typedefs from the DWO file. 317196500Sed const DWARFDIE encoding_die = dwarf->GetDIE(DIERef(encoding_uid)); 3182088Ssos 3192088Ssos // First make sure that the die that this is typedef'ed to _is_ 32032316Syokota // just a declaration (DW_AT_declaration == 1), not a full definition 3212088Ssos // since template types can't be represented in modules since only 3222088Ssos // concrete instances of templates are ever emitted and modules 32332316Syokota // won't contain those 32432316Syokota if (encoding_die && 3252088Ssos encoding_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 3262088Ssos 1) { 32732316Syokota type_sp = ParseTypeFromDWO(die, log); 32832316Syokota if (type_sp) 32932316Syokota return type_sp; 33032316Syokota } 33132316Syokota } 33232316Syokota 3332088Ssos DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\") type => 0x%8.8lx\n", 33432316Syokota die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr, 33532316Syokota encoding_uid.Reference()); 33632316Syokota 33732316Syokota switch (tag) { 33832316Syokota default: 33932316Syokota break; 34032316Syokota 34132316Syokota case DW_TAG_unspecified_type: 34232316Syokota if (strcmp(type_name_cstr, "nullptr_t") == 0 || 34332316Syokota strcmp(type_name_cstr, "decltype(nullptr)") == 0) { 34432316Syokota resolve_state = Type::eResolveStateFull; 34532316Syokota clang_type = m_ast.GetBasicType(eBasicTypeNullPtr); 34632316Syokota break; 34732316Syokota } 34832316Syokota // Fall through to base type below in case we can handle the type 34932316Syokota // there... 35032316Syokota LLVM_FALLTHROUGH; 35132316Syokota 35232316Syokota case DW_TAG_base_type: 35332316Syokota resolve_state = Type::eResolveStateFull; 35432316Syokota clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize( 35532316Syokota type_name_cstr, encoding, byte_size * 8); 35632316Syokota break; 35732316Syokota 35832316Syokota case DW_TAG_pointer_type: 35932316Syokota encoding_data_type = Type::eEncodingIsPointerUID; 36032316Syokota break; 36132316Syokota case DW_TAG_reference_type: 36232316Syokota encoding_data_type = Type::eEncodingIsLValueReferenceUID; 36332316Syokota break; 36432316Syokota case DW_TAG_rvalue_reference_type: 36532316Syokota encoding_data_type = Type::eEncodingIsRValueReferenceUID; 36632316Syokota break; 36732316Syokota case DW_TAG_typedef: 36832316Syokota encoding_data_type = Type::eEncodingIsTypedefUID; 36932316Syokota break; 37032316Syokota case DW_TAG_const_type: 37132316Syokota encoding_data_type = Type::eEncodingIsConstUID; 37232316Syokota break; 37332316Syokota case DW_TAG_restrict_type: 37432316Syokota encoding_data_type = Type::eEncodingIsRestrictUID; 37532316Syokota break; 37632316Syokota case DW_TAG_volatile_type: 37732316Syokota encoding_data_type = Type::eEncodingIsVolatileUID; 37832316Syokota break; 37932316Syokota } 38032316Syokota 38132316Syokota if (!clang_type && 38232316Syokota (encoding_data_type == Type::eEncodingIsPointerUID || 38332316Syokota encoding_data_type == Type::eEncodingIsTypedefUID) && 38432316Syokota sc.comp_unit != NULL) { 38532316Syokota if (tag == DW_TAG_pointer_type) { 38632316Syokota DWARFDIE target_die = die.GetReferencedDIE(DW_AT_type); 38732316Syokota 38829603Scharnier if (target_die.GetAttributeValueAsUnsigned(DW_AT_APPLE_block, 0)) { 3892088Ssos // Blocks have a __FuncPtr inside them which is a pointer to a 3902088Ssos // function of the proper type. 391196500Sed 3922088Ssos for (DWARFDIE child_die = target_die.GetFirstChild(); 3932088Ssos child_die.IsValid(); child_die = child_die.GetSibling()) { 394196500Sed if (!strcmp(child_die.GetAttributeValueAsString(DW_AT_name, ""), 3958857Srgrimes "__FuncPtr")) { 3962088Ssos DWARFDIE function_pointer_type = 397196500Sed child_die.GetReferencedDIE(DW_AT_type); 3982088Ssos 3992088Ssos if (function_pointer_type) { 400196500Sed DWARFDIE function_type = 4012088Ssos function_pointer_type.GetReferencedDIE(DW_AT_type); 4022088Ssos 403196500Sed bool function_type_is_new_pointer; 4042088Ssos TypeSP lldb_function_type_sp = ParseTypeFromDWARF( 4052088Ssos sc, function_type, log, &function_type_is_new_pointer); 406196500Sed 4072088Ssos if (lldb_function_type_sp) { 4082088Ssos clang_type = m_ast.CreateBlockPointerType( 409196500Sed lldb_function_type_sp->GetForwardCompilerType()); 4102088Ssos encoding_data_type = Type::eEncodingIsUID; 4112088Ssos encoding_uid.Clear(); 412196500Sed resolve_state = Type::eResolveStateFull; 4132088Ssos } 4142088Ssos } 415196500Sed 4162088Ssos break; 4172088Ssos } 418196500Sed } 4192088Ssos } 4202088Ssos } 421196500Sed 4222088Ssos bool translation_unit_is_objc = 4232088Ssos (sc.comp_unit->GetLanguage() == eLanguageTypeObjC || 424196500Sed sc.comp_unit->GetLanguage() == eLanguageTypeObjC_plus_plus); 42548105Syokota 42648105Syokota if (translation_unit_is_objc) { 427196500Sed if (type_name_cstr != NULL) { 4282088Ssos static ConstString g_objc_type_name_id("id"); 4292088Ssos static ConstString g_objc_type_name_Class("Class"); 430196500Sed static ConstString g_objc_type_name_selector("SEL"); 4312088Ssos 4322088Ssos if (type_name_const_str == g_objc_type_name_id) { 433196500Sed if (log) 4342088Ssos dwarf->GetObjectFile()->GetModule()->LogMessage( 4352088Ssos log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 436196500Sed "is Objective C 'id' built-in type.", 4372088Ssos die.GetOffset(), die.GetTagAsCString(), die.GetName()); 4382088Ssos clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 439196500Sed encoding_data_type = Type::eEncodingIsUID; 4402088Ssos encoding_uid.Clear(); 4412088Ssos resolve_state = Type::eResolveStateFull; 442196500Sed 4432088Ssos } else if (type_name_const_str == g_objc_type_name_Class) { 4442088Ssos if (log) 445196500Sed dwarf->GetObjectFile()->GetModule()->LogMessage( 4462088Ssos log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 4472088Ssos "is Objective C 'Class' built-in type.", 448196500Sed die.GetOffset(), die.GetTagAsCString(), die.GetName()); 44932316Syokota clang_type = m_ast.GetBasicType(eBasicTypeObjCClass); 45032316Syokota encoding_data_type = Type::eEncodingIsUID; 451196500Sed encoding_uid.Clear(); 45238053Syokota resolve_state = Type::eResolveStateFull; 45338053Syokota } else if (type_name_const_str == g_objc_type_name_selector) { 454196500Sed if (log) 45554380Syokota dwarf->GetObjectFile()->GetModule()->LogMessage( 45654380Syokota log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' " 457196500Sed "is Objective C 'selector' built-in type.", 45854380Syokota die.GetOffset(), die.GetTagAsCString(), die.GetName()); 45954380Syokota clang_type = m_ast.GetBasicType(eBasicTypeObjCSel); 460196500Sed encoding_data_type = Type::eEncodingIsUID; 46154380Syokota encoding_uid.Clear(); 46254380Syokota resolve_state = Type::eResolveStateFull; 463196500Sed } 46454380Syokota } else if (encoding_data_type == Type::eEncodingIsPointerUID && 46554380Syokota encoding_uid.IsValid()) { 466196500Sed // Clang sometimes erroneously emits id as objc_object*. In that 46754380Syokota // case we fix up the type to "id". 46854380Syokota 469196500Sed const DWARFDIE encoding_die = dwarf->GetDIE(DIERef(encoding_uid)); 47054380Syokota 47154380Syokota if (encoding_die && encoding_die.Tag() == DW_TAG_structure_type) { 472196500Sed if (const char *struct_name = encoding_die.GetName()) { 47354380Syokota if (!strcmp(struct_name, "objc_object")) { 47454380Syokota if (log) 475196500Sed dwarf->GetObjectFile()->GetModule()->LogMessage( 47665759Sdwmalone log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s " 47765759Sdwmalone "'%s' is 'objc_object*', which we overrode to " 478196500Sed "'id'.", 47965759Sdwmalone die.GetOffset(), die.GetTagAsCString(), 48065759Sdwmalone die.GetName()); 481196500Sed clang_type = m_ast.GetBasicType(eBasicTypeObjCID); 48274118Sache encoding_data_type = Type::eEncodingIsUID; 48374118Sache encoding_uid.Clear(); 4842088Ssos resolve_state = Type::eResolveStateFull; 485196500Sed } 4868857Srgrimes } 4872088Ssos } 4888857Srgrimes } 4892088Ssos } 49032316Syokota } 49132316Syokota 4922088Ssos type_sp.reset( 4938857Srgrimes new Type(die.GetID(), dwarf, type_name_const_str, byte_size, NULL, 4942088Ssos DIERef(encoding_uid).GetUID(dwarf), encoding_data_type, 49532316Syokota &decl, clang_type, resolve_state)); 4962088Ssos 4972088Ssos dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 4982088Ssos 4998857Srgrimes // Type* encoding_type = 5002088Ssos // GetUniquedTypeForDIEOffset(encoding_uid, type_sp, 5018857Srgrimes // NULL, 0, 0, false); 5029202Srgrimes // if (encoding_type != NULL) 5038857Srgrimes // { 5042088Ssos // if (encoding_type != DIE_IS_BEING_PARSED) 5058857Srgrimes // type_sp->SetEncodingType(encoding_type); 5062088Ssos // else 5078857Srgrimes // m_indirect_fixups.push_back(type_sp.get()); 5082088Ssos // } 5092088Ssos } break; 5102088Ssos 5112088Ssos case DW_TAG_structure_type: 5122088Ssos case DW_TAG_union_type: 51342505Syokota case DW_TAG_class_type: { 5142088Ssos // Set a bit that lets us know that we are currently parsing this 51529603Scharnier dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 5162088Ssos bool byte_size_valid = false; 5172088Ssos 5182088Ssos LanguageType class_language = eLanguageTypeUnknown; 5192088Ssos bool is_complete_objc_class = false; 5202088Ssos // bool struct_is_class = false; 5212088Ssos const size_t num_attributes = die.GetAttributes(attributes); 5222088Ssos if (num_attributes > 0) { 5232088Ssos uint32_t i; 5242088Ssos for (i = 0; i < num_attributes; ++i) { 5252088Ssos attr = attributes.AttributeAtIndex(i); 526196500Sed if (attributes.ExtractFormValueAtIndex(i, form_value)) { 5272088Ssos switch (attr) { 5288857Srgrimes case DW_AT_decl_file: 5292088Ssos if (die.GetCU()->DW_AT_decl_file_attributes_are_invalid()) { 5302088Ssos // llvm-gcc outputs invalid DW_AT_decl_file attributes that 5312088Ssos // always 5322088Ssos // point to the compile unit file, so we clear this invalid 5332088Ssos // value 5342088Ssos // so that we can still unique types efficiently. 5352088Ssos decl.SetFile(FileSpec("<invalid>", false)); 5362088Ssos } else 5372088Ssos decl.SetFile( 5382088Ssos sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 5392088Ssos form_value.Unsigned())); 5402088Ssos break; 5412088Ssos 5426046Ssos case DW_AT_decl_line: 5436046Ssos decl.SetLine(form_value.Unsigned()); 5446046Ssos break; 5458857Srgrimes 5462088Ssos case DW_AT_decl_column: 5472088Ssos decl.SetColumn(form_value.Unsigned()); 54832316Syokota break; 54932316Syokota 55032316Syokota case DW_AT_name: 55132316Syokota type_name_cstr = form_value.AsCString(); 55232316Syokota type_name_const_str.SetCString(type_name_cstr); 5532088Ssos break; 55432316Syokota 55532316Syokota case DW_AT_byte_size: 55632316Syokota byte_size = form_value.Unsigned(); 55732316Syokota byte_size_valid = true; 55832316Syokota break; 55932316Syokota 56032316Syokota case DW_AT_accessibility: 56132316Syokota accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 56232316Syokota break; 56332316Syokota 56432316Syokota case DW_AT_declaration: 56532316Syokota is_forward_declaration = form_value.Boolean(); 56632316Syokota break; 56732316Syokota 56832316Syokota case DW_AT_APPLE_runtime_class: 56932316Syokota class_language = (LanguageType)form_value.Signed(); 57032316Syokota break; 57132316Syokota 57232316Syokota case DW_AT_APPLE_objc_complete_type: 57332316Syokota is_complete_objc_class = form_value.Signed(); 57432316Syokota break; 57532316Syokota 57632316Syokota case DW_AT_allocated: 57732316Syokota case DW_AT_associated: 57832316Syokota case DW_AT_data_location: 57932316Syokota case DW_AT_description: 58032316Syokota case DW_AT_start_scope: 58132316Syokota case DW_AT_visibility: 58232316Syokota default: 58332316Syokota case DW_AT_sibling: 58432316Syokota break; 58532316Syokota } 58632316Syokota } 58732316Syokota } 58832316Syokota } 5892088Ssos 59032316Syokota // UniqueDWARFASTType is large, so don't create a local variables on the 59132316Syokota // stack, put it on the heap. This function is often called recursively 592196500Sed // and clang isn't good and sharing the stack space for variables in 593196500Sed // different blocks. 59432316Syokota std::unique_ptr<UniqueDWARFASTType> unique_ast_entry_ap( 59532316Syokota new UniqueDWARFASTType()); 59632316Syokota 59732316Syokota ConstString unique_typename(type_name_const_str); 59832316Syokota Declaration unique_decl(decl); 59932316Syokota 60032316Syokota if (type_name_const_str) { 60132316Syokota LanguageType die_language = die.GetLanguage(); 60232316Syokota if (Language::LanguageIsCPlusPlus(die_language)) { 60332316Syokota // For C++, we rely solely upon the one definition rule that says 60432316Syokota // only 60532316Syokota // one thing can exist at a given decl context. We ignore the file 60632316Syokota // and 60732316Syokota // line that things are declared on. 60832316Syokota std::string qualified_name; 60932316Syokota if (die.GetQualifiedName(qualified_name)) 61032316Syokota unique_typename = ConstString(qualified_name); 61132316Syokota unique_decl.Clear(); 61232316Syokota } 61332316Syokota 61432316Syokota if (dwarf->GetUniqueDWARFASTTypeMap().Find( 61532316Syokota unique_typename, die, unique_decl, 61632316Syokota byte_size_valid ? byte_size : -1, *unique_ast_entry_ap)) { 61732316Syokota type_sp = unique_ast_entry_ap->m_type_sp; 61832316Syokota if (type_sp) { 61932316Syokota dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 62032316Syokota return type_sp; 62132316Syokota } 62232316Syokota } 62332316Syokota } 62432316Syokota 62548105Syokota DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 62648105Syokota DW_TAG_value_to_name(tag), type_name_cstr); 62748105Syokota 62832316Syokota int tag_decl_kind = -1; 62932316Syokota AccessType default_accessibility = eAccessNone; 63032316Syokota if (tag == DW_TAG_structure_type) { 63132316Syokota tag_decl_kind = clang::TTK_Struct; 63232316Syokota default_accessibility = eAccessPublic; 63332316Syokota } else if (tag == DW_TAG_union_type) { 63432316Syokota tag_decl_kind = clang::TTK_Union; 63532316Syokota default_accessibility = eAccessPublic; 63632316Syokota } else if (tag == DW_TAG_class_type) { 63732316Syokota tag_decl_kind = clang::TTK_Class; 63832316Syokota default_accessibility = eAccessPrivate; 63932316Syokota } 64032316Syokota 64132316Syokota if (byte_size_valid && byte_size == 0 && type_name_cstr && 64232316Syokota die.HasChildren() == false && 64332316Syokota sc.comp_unit->GetLanguage() == eLanguageTypeObjC) { 64432316Syokota // Work around an issue with clang at the moment where 64532316Syokota // forward declarations for objective C classes are emitted 64632316Syokota // as: 64732316Syokota // DW_TAG_structure_type [2] 64832316Syokota // DW_AT_name( "ForwardObjcClass" ) 64932316Syokota // DW_AT_byte_size( 0x00 ) 65032316Syokota // DW_AT_decl_file( "..." ) 65132316Syokota // DW_AT_decl_line( 1 ) 65238053Syokota // 65338053Syokota // Note that there is no DW_AT_declaration and there are 65438053Syokota // no children, and the byte size is zero. 65554380Syokota is_forward_declaration = true; 65654380Syokota } 65754380Syokota 65854380Syokota if (class_language == eLanguageTypeObjC || 65954380Syokota class_language == eLanguageTypeObjC_plus_plus) { 66054380Syokota if (!is_complete_objc_class && 66154380Syokota die.Supports_DW_AT_APPLE_objc_complete_type()) { 66254380Syokota // We have a valid eSymbolTypeObjCClass class symbol whose 66354380Syokota // name matches the current objective C class that we 66454380Syokota // are trying to find and this DIE isn't the complete 66554380Syokota // definition (we checked is_complete_objc_class above and 66654380Syokota // know it is false), so the real definition is in here somewhere 66754380Syokota type_sp = dwarf->FindCompleteObjCDefinitionTypeForDIE( 66854380Syokota die, type_name_const_str, true); 66954380Syokota 67054380Syokota if (!type_sp) { 67154380Syokota SymbolFileDWARFDebugMap *debug_map_symfile = 67254380Syokota dwarf->GetDebugMapSymfile(); 67354380Syokota if (debug_map_symfile) { 67454380Syokota // We weren't able to find a full declaration in 67554380Syokota // this DWARF, see if we have a declaration anywhere 67665759Sdwmalone // else... 67765759Sdwmalone type_sp = 67865759Sdwmalone debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE( 67965759Sdwmalone die, type_name_const_str, true); 68065759Sdwmalone } 68165759Sdwmalone } 68274118Sache 68374118Sache if (type_sp) { 68474118Sache if (log) { 68532316Syokota dwarf->GetObjectFile()->GetModule()->LogMessage( 68632316Syokota log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is an " 68732316Syokota "incomplete objc type, complete type is 0x%8.8" PRIx64, 68832316Syokota static_cast<void *>(this), die.GetOffset(), 68932486Syokota DW_TAG_value_to_name(tag), type_name_cstr, 69032316Syokota type_sp->GetID()); 69132316Syokota } 69232316Syokota 69332316Syokota // We found a real definition for this type elsewhere 69432316Syokota // so lets use it and cache the fact that we found 69532316Syokota // a complete type for this die 69632316Syokota dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 69732316Syokota return type_sp; 69832316Syokota } 69932316Syokota } 70032316Syokota } 70132316Syokota 70232316Syokota if (is_forward_declaration) { 70332316Syokota // We have a forward declaration to a type and we need 70432316Syokota // to try and find a full declaration. We look in the 70532316Syokota // current type index just in case we have a forward 70632316Syokota // declaration followed by an actual declarations in the 70732316Syokota // DWARF. If this fails, we need to look elsewhere... 70832316Syokota if (log) { 70932316Syokota dwarf->GetObjectFile()->GetModule()->LogMessage( 71032316Syokota log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 71132316Syokota "forward declaration, trying to find complete type", 71232486Syokota static_cast<void *>(this), die.GetOffset(), 71332316Syokota DW_TAG_value_to_name(tag), type_name_cstr); 71432316Syokota } 71532486Syokota 71632486Syokota // See if the type comes from a DWO module and if so, track down that 71732486Syokota // type. 71832316Syokota type_sp = ParseTypeFromDWO(die, log); 71932316Syokota if (type_sp) 72032316Syokota return type_sp; 72132486Syokota 72232316Syokota DWARFDeclContext die_decl_ctx; 72332316Syokota die.GetDWARFDeclContext(die_decl_ctx); 724196500Sed 72532316Syokota // type_sp = FindDefinitionTypeForDIE (dwarf_cu, die, 72632316Syokota // type_name_const_str); 72732316Syokota type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx); 72832486Syokota 72932316Syokota if (!type_sp) { 73032316Syokota SymbolFileDWARFDebugMap *debug_map_symfile = 73132316Syokota dwarf->GetDebugMapSymfile(); 73232486Syokota if (debug_map_symfile) { 73332316Syokota // We weren't able to find a full declaration in 73432316Syokota // this DWARF, see if we have a declaration anywhere 73532316Syokota // else... 73632316Syokota type_sp = 73732316Syokota debug_map_symfile->FindDefinitionTypeForDWARFDeclContext( 73832316Syokota die_decl_ctx); 73932316Syokota } 74032316Syokota } 74132486Syokota 74232316Syokota if (type_sp) { 74332486Syokota if (log) { 74432486Syokota dwarf->GetObjectFile()->GetModule()->LogMessage( 74532486Syokota log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 74632486Syokota "forward declaration, complete type is 0x%8.8" PRIx64, 74732486Syokota static_cast<void *>(this), die.GetOffset(), 74832316Syokota DW_TAG_value_to_name(tag), type_name_cstr, type_sp->GetID()); 74932316Syokota } 75032316Syokota 75132316Syokota // We found a real definition for this type elsewhere 75232316Syokota // so lets use it and cache the fact that we found 75332316Syokota // a complete type for this die 75432316Syokota dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 75532316Syokota clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE( 75632316Syokota dwarf->DebugInfo()->GetDIE(DIERef(type_sp->GetID(), dwarf))); 75732316Syokota if (defn_decl_ctx) 75832316Syokota LinkDeclContextToDIE(defn_decl_ctx, die); 75932316Syokota return type_sp; 76032316Syokota } 76132316Syokota } 76232316Syokota assert(tag_decl_kind != -1); 76332316Syokota bool clang_type_was_created = false; 76432316Syokota clang_type.SetCompilerType( 76532316Syokota &m_ast, dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE())); 76632316Syokota if (!clang_type) { 76732316Syokota clang::DeclContext *decl_ctx = 76832316Syokota GetClangDeclContextContainingDIE(die, nullptr); 76932316Syokota if (accessibility == eAccessNone && decl_ctx) { 77032316Syokota // Check the decl context that contains this class/struct/union. 77132316Syokota // If it is a class we must give it an accessibility. 77232316Syokota const clang::Decl::Kind containing_decl_kind = 77332316Syokota decl_ctx->getDeclKind(); 77432316Syokota if (DeclKindIsCXXClass(containing_decl_kind)) 77532316Syokota accessibility = default_accessibility; 77632486Syokota } 77732316Syokota 77832316Syokota ClangASTMetadata metadata; 77932316Syokota metadata.SetUserID(die.GetID()); 78019569Sjoerg metadata.SetIsDynamicCXXType(dwarf->ClassOrStructIsVirtual(die)); 7812088Ssos 78232316Syokota if (type_name_cstr && strchr(type_name_cstr, '<')) { 78332316Syokota ClangASTContext::TemplateParameterInfos template_param_infos; 7842088Ssos if (ParseTemplateParameterInfos(die, template_param_infos)) { 78576502Ssobomax clang::ClassTemplateDecl *class_template_decl = 78619569Sjoerg m_ast.ParseClassTemplateDecl(decl_ctx, accessibility, 78799816Salfred type_name_cstr, tag_decl_kind, 78899816Salfred template_param_infos); 78999816Salfred 7902088Ssos clang::ClassTemplateSpecializationDecl 79176569Ssobomax *class_specialization_decl = 79276569Ssobomax m_ast.CreateClassTemplateSpecializationDecl( 79376569Ssobomax decl_ctx, class_template_decl, tag_decl_kind, 79476502Ssobomax template_param_infos); 79576643Simp clang_type = m_ast.CreateClassTemplateSpecializationType( 79676643Simp class_specialization_decl); 79776643Simp clang_type_was_created = true; 79876502Ssobomax 79976643Simp m_ast.SetMetadata(class_template_decl, metadata); 80076502Ssobomax m_ast.SetMetadata(class_specialization_decl, metadata); 80176643Simp } 8022088Ssos } 80379677Sobrien 8042088Ssos if (!clang_type_was_created) { 8052088Ssos clang_type_was_created = true; 80632316Syokota clang_type = m_ast.CreateRecordType(decl_ctx, accessibility, 80732316Syokota type_name_cstr, tag_decl_kind, 80832316Syokota class_language, &metadata); 8092088Ssos } 81032316Syokota } 8112088Ssos 8122088Ssos // Store a forward declaration to this class type in case any 81319569Sjoerg // parameters in any class methods need it for the clang 81419569Sjoerg // types for function prototypes. 81519569Sjoerg LinkDeclContextToDIE(m_ast.GetDeclContextForType(clang_type), die); 81619569Sjoerg type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, 81732316Syokota byte_size, NULL, LLDB_INVALID_UID, 81832316Syokota Type::eEncodingIsUID, &decl, clang_type, 81932316Syokota Type::eResolveStateForward)); 82032316Syokota 82132316Syokota type_sp->SetIsCompleteObjCClass(is_complete_objc_class); 82232316Syokota 82319569Sjoerg // Add our type to the unique type map so we don't 82419569Sjoerg // end up creating many copies of the same type over 82532316Syokota // and over in the ASTContext for our module 82629603Scharnier unique_ast_entry_ap->m_type_sp = type_sp; 8272088Ssos unique_ast_entry_ap->m_die = die; 8282088Ssos unique_ast_entry_ap->m_declaration = unique_decl; 8292088Ssos unique_ast_entry_ap->m_byte_size = byte_size; 83032316Syokota dwarf->GetUniqueDWARFASTTypeMap().Insert(unique_typename, 83132316Syokota *unique_ast_entry_ap); 83232316Syokota 83332316Syokota if (is_forward_declaration && die.HasChildren()) { 83432316Syokota // Check to see if the DIE actually has a definition, some version of 83532316Syokota // GCC will 8362088Ssos // emit DIEs with DW_AT_declaration set to true, but yet still have 8372088Ssos // subprogram, 8382088Ssos // members, or inheritance, so we can't trust it 83999816Salfred DWARFDIE child_die = die.GetFirstChild(); 8402088Ssos while (child_die) { 84132316Syokota switch (child_die.Tag()) { 84232316Syokota case DW_TAG_inheritance: 8432088Ssos case DW_TAG_subprogram: 8442088Ssos case DW_TAG_member: 84532316Syokota case DW_TAG_APPLE_property: 84629603Scharnier case DW_TAG_class_type: 84732316Syokota case DW_TAG_structure_type: 84832316Syokota case DW_TAG_enumeration_type: 8492088Ssos case DW_TAG_typedef: 8502088Ssos case DW_TAG_union_type: 8512088Ssos child_die.Clear(); 8522088Ssos is_forward_declaration = false; 8532088Ssos break; 8542088Ssos default: 85532316Syokota child_die = child_die.GetSibling(); 85632316Syokota break; 85732316Syokota } 85832316Syokota } 85932316Syokota } 86032316Syokota 86132316Syokota if (!is_forward_declaration) { 8622088Ssos // Always start the definition for a class type so that 8632088Ssos // if the class has child classes or types that require 8642088Ssos // the class to be created for use as their decl contexts 86599816Salfred // the class will be ready to accept these child definitions. 8662088Ssos if (die.HasChildren() == false) { 8672088Ssos // No children for this struct/union/class, lets finish it 8682088Ssos if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 8692088Ssos ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 8702088Ssos } else { 8712088Ssos dwarf->GetObjectFile()->GetModule()->ReportError( 8722088Ssos "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 8732088Ssos "definition.\nPlease file a bug and attach the file at the " 8742088Ssos "start of this error message", 87529603Scharnier die.GetOffset(), type_name_cstr); 8762088Ssos } 8772088Ssos 8782088Ssos if (tag == DW_TAG_structure_type) // this only applies in C 8792088Ssos { 8802088Ssos clang::RecordDecl *record_decl = 8812088Ssos ClangASTContext::GetAsRecordDecl(clang_type); 8822088Ssos 8832088Ssos if (record_decl) { 8842088Ssos GetClangASTImporter().InsertRecordDecl( 8852088Ssos record_decl, ClangASTImporter::LayoutInfo()); 8862088Ssos } 8872088Ssos } 8882088Ssos } else if (clang_type_was_created) { 8892088Ssos // Start the definition if the class is not objective C since 89029603Scharnier // the underlying decls respond to isCompleteDefinition(). Objective 8912088Ssos // C decls don't respond to isCompleteDefinition() so we can't 8922088Ssos // start the declaration definition right away. For C++ 8932088Ssos // class/union/structs 8942088Ssos // we want to start the definition in case the class is needed as 89529603Scharnier // the 8962088Ssos // declaration context for a contained class or type without the 8972088Ssos // need 8982088Ssos // to complete that type.. 899133353Sjmg 9002088Ssos if (class_language != eLanguageTypeObjC && 9012088Ssos class_language != eLanguageTypeObjC_plus_plus) 90229603Scharnier ClangASTContext::StartTagDeclarationDefinition(clang_type); 9032088Ssos 9042088Ssos // Leave this as a forward declaration until we need 9052088Ssos // to know the details of the type. lldb_private::Type 9062088Ssos // will automatically call the SymbolFile virtual function 9072088Ssos // "SymbolFileDWARF::CompleteType(Type *)" 9085536Ssos // When the definition needs to be defined. 9092088Ssos assert(!dwarf->GetForwardDeclClangTypeToDie().count( 91038044Syokota ClangUtil::RemoveFastQualifiers(clang_type) 91138044Syokota .GetOpaqueQualType()) && 912164333Sru "Type already in the forward declaration map!"); 91338044Syokota // Can't assume m_ast.GetSymbolFile() is actually a SymbolFileDWARF, 91438044Syokota // it can be a 9158857Srgrimes // SymbolFileDWARFDebugMap for Apple binaries. 916164333Sru dwarf->GetForwardDeclDieToClangType()[die.GetDIE()] = 9175536Ssos clang_type.GetOpaqueQualType(); 91838044Syokota dwarf->GetForwardDeclClangTypeToDie() 91948982Syokota [ClangUtil::RemoveFastQualifiers(clang_type) 92048982Syokota .GetOpaqueQualType()] = die.GetDIERef(); 9212088Ssos m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), true); 9222088Ssos } 9238857Srgrimes } 9245536Ssos } break; 9252088Ssos 9262088Ssos case DW_TAG_enumeration_type: { 9272088Ssos // Set a bit that lets us know that we are currently parsing this 9282088Ssos dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 9292088Ssos 9302088Ssos DWARFFormValue encoding_form; 9312088Ssos 93277394Ssobomax const size_t num_attributes = die.GetAttributes(attributes); 9332088Ssos if (num_attributes > 0) { 9342088Ssos uint32_t i; 93538044Syokota 93638044Syokota for (i = 0; i < num_attributes; ++i) { 93738044Syokota attr = attributes.AttributeAtIndex(i); 9382088Ssos if (attributes.ExtractFormValueAtIndex(i, form_value)) { 9392088Ssos switch (attr) { 9405536Ssos case DW_AT_decl_file: 941164333Sru decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 9425536Ssos form_value.Unsigned())); 9432088Ssos break; 9442088Ssos case DW_AT_decl_line: 9452088Ssos decl.SetLine(form_value.Unsigned()); 9462088Ssos break; 9472088Ssos case DW_AT_decl_column: 94844628Syokota decl.SetColumn(form_value.Unsigned()); 94939047Syokota break; 95039047Syokota case DW_AT_name: 95146761Syokota type_name_cstr = form_value.AsCString(); 9522088Ssos type_name_const_str.SetCString(type_name_cstr); 95346761Syokota break; 95444628Syokota case DW_AT_type: 95546761Syokota encoding_form = form_value; 95646761Syokota break; 95744628Syokota case DW_AT_byte_size: 95846761Syokota byte_size = form_value.Unsigned(); 95946761Syokota break; 96039047Syokota case DW_AT_accessibility: 96146761Syokota break; // accessibility = 96246761Syokota // DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 9632088Ssos case DW_AT_declaration: 9642088Ssos is_forward_declaration = form_value.Boolean(); 9652088Ssos break; 9662088Ssos case DW_AT_allocated: 9672088Ssos case DW_AT_associated: 9682088Ssos case DW_AT_bit_stride: 9692088Ssos case DW_AT_byte_stride: 9702088Ssos case DW_AT_data_location: 9712088Ssos case DW_AT_description: 9722088Ssos case DW_AT_start_scope: 97377394Ssobomax case DW_AT_visibility: 9742088Ssos case DW_AT_specification: 9752088Ssos case DW_AT_abstract_origin: 97646761Syokota case DW_AT_sibling: 97746761Syokota break; 97846761Syokota } 97946761Syokota } 98046761Syokota } 98146761Syokota 98246761Syokota if (is_forward_declaration) { 98346761Syokota type_sp = ParseTypeFromDWO(die, log); 9842088Ssos if (type_sp) 9852088Ssos return type_sp; 98644628Syokota 98744628Syokota DWARFDeclContext die_decl_ctx; 98846761Syokota die.GetDWARFDeclContext(die_decl_ctx); 98946761Syokota 99046761Syokota type_sp = 99146761Syokota dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx); 9922088Ssos 9932088Ssos if (!type_sp) { 99499816Salfred SymbolFileDWARFDebugMap *debug_map_symfile = 99599816Salfred dwarf->GetDebugMapSymfile(); 99642505Syokota if (debug_map_symfile) { 99742505Syokota // We weren't able to find a full declaration in 99842505Syokota // this DWARF, see if we have a declaration anywhere 99999816Salfred // else... 100042505Syokota type_sp = 100142505Syokota debug_map_symfile->FindDefinitionTypeForDWARFDeclContext( 100242505Syokota die_decl_ctx); 100342505Syokota } 100442505Syokota } 100599816Salfred 10066046Ssos if (type_sp) { 100742505Syokota if (log) { 100842505Syokota dwarf->GetObjectFile()->GetModule()->LogMessage( 100942505Syokota log, "SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a " 101042505Syokota "forward declaration, complete type is 0x%8.8" PRIx64, 101142505Syokota static_cast<void *>(this), die.GetOffset(), 101242505Syokota DW_TAG_value_to_name(tag), type_name_cstr, 101342505Syokota type_sp->GetID()); 101442505Syokota } 101542505Syokota 101642505Syokota // We found a real definition for this type elsewhere 101742505Syokota // so lets use it and cache the fact that we found 101842505Syokota // a complete type for this die 101942505Syokota dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 102042505Syokota clang::DeclContext *defn_decl_ctx = 102142505Syokota GetCachedClangDeclContextForDIE(dwarf->DebugInfo()->GetDIE( 102242505Syokota DIERef(type_sp->GetID(), dwarf))); 102342505Syokota if (defn_decl_ctx) 102442505Syokota LinkDeclContextToDIE(defn_decl_ctx, die); 102577394Ssobomax return type_sp; 102642505Syokota } 102742505Syokota } 102842505Syokota DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 102942505Syokota DW_TAG_value_to_name(tag), type_name_cstr); 103042505Syokota 103142505Syokota CompilerType enumerator_clang_type; 103242505Syokota clang_type.SetCompilerType( 103342505Syokota &m_ast, 103442505Syokota dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE())); 103542505Syokota if (!clang_type) { 103642505Syokota if (encoding_form.IsValid()) { 103742505Syokota Type *enumerator_type = 103842505Syokota dwarf->ResolveTypeUID(DIERef(encoding_form)); 103942505Syokota if (enumerator_type) 104042505Syokota enumerator_clang_type = enumerator_type->GetFullCompilerType(); 104142505Syokota } 104242505Syokota 104342505Syokota if (!enumerator_clang_type) { 104442505Syokota if (byte_size > 0) { 104542505Syokota enumerator_clang_type = 104642505Syokota m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize( 104742505Syokota NULL, DW_ATE_signed, byte_size * 8); 104842505Syokota } else { 104942505Syokota enumerator_clang_type = m_ast.GetBasicType(eBasicTypeInt); 105042505Syokota } 105142505Syokota } 105242505Syokota 105342505Syokota clang_type = m_ast.CreateEnumerationType( 105442505Syokota type_name_cstr, GetClangDeclContextContainingDIE(die, nullptr), 105577394Ssobomax decl, enumerator_clang_type); 105642505Syokota } else { 105742505Syokota enumerator_clang_type = 105842505Syokota m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType()); 105942505Syokota } 106042505Syokota 106142505Syokota LinkDeclContextToDIE( 106242505Syokota ClangASTContext::GetDeclContextForType(clang_type), die); 106342505Syokota 106442505Syokota type_sp.reset(new Type( 106542505Syokota die.GetID(), dwarf, type_name_const_str, byte_size, NULL, 106642505Syokota DIERef(encoding_form).GetUID(dwarf), Type::eEncodingIsUID, &decl, 106742505Syokota clang_type, Type::eResolveStateForward)); 106842505Syokota 106942505Syokota if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 107042505Syokota if (die.HasChildren()) { 107142505Syokota SymbolContext cu_sc(die.GetLLDBCompileUnit()); 107242505Syokota bool is_signed = false; 107342505Syokota enumerator_clang_type.IsIntegerType(is_signed); 107442505Syokota ParseChildEnumerators(cu_sc, clang_type, is_signed, 107542505Syokota type_sp->GetByteSize(), die); 107642505Syokota } 107742505Syokota ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 107842505Syokota } else { 107977394Ssobomax dwarf->GetObjectFile()->GetModule()->ReportError( 108042505Syokota "DWARF DIE at 0x%8.8x named \"%s\" was not able to start its " 108142505Syokota "definition.\nPlease file a bug and attach the file at the " 108242505Syokota "start of this error message", 108342505Syokota die.GetOffset(), type_name_cstr); 108442505Syokota } 108542505Syokota } 1086148017Semax } break; 1087162327Semax 1088148017Semax case DW_TAG_inlined_subroutine: 1089148017Semax case DW_TAG_subprogram: 1090148017Semax case DW_TAG_subroutine_type: { 109142505Syokota // Set a bit that lets us know that we are currently parsing this 1092148017Semax dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1093148017Semax 1094148017Semax DWARFFormValue type_die_form; 1095148017Semax bool is_variadic = false; 1096148017Semax bool is_inline = false; 1097148017Semax bool is_static = false; 1098148017Semax bool is_virtual = false; 1099148017Semax bool is_explicit = false; 1100148017Semax bool is_artificial = false; 1101148017Semax bool has_template_params = false; 1102148017Semax DWARFFormValue specification_die_form; 1103148017Semax DWARFFormValue abstract_origin_die_form; 1104148017Semax dw_offset_t object_pointer_die_offset = DW_INVALID_OFFSET; 1105148017Semax 1106148017Semax unsigned type_quals = 0; 1107148017Semax clang::StorageClass storage = 1108148017Semax clang::SC_None; //, Extern, Static, PrivateExtern 1109148017Semax 1110148017Semax const size_t num_attributes = die.GetAttributes(attributes); 1111148017Semax if (num_attributes > 0) { 1112148017Semax uint32_t i; 1113148017Semax for (i = 0; i < num_attributes; ++i) { 1114148017Semax attr = attributes.AttributeAtIndex(i); 1115148017Semax if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1116148017Semax switch (attr) { 1117148017Semax case DW_AT_decl_file: 1118148017Semax decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 1119148017Semax form_value.Unsigned())); 1120148017Semax break; 1121148017Semax case DW_AT_decl_line: 1122148017Semax decl.SetLine(form_value.Unsigned()); 1123148017Semax break; 1124148017Semax case DW_AT_decl_column: 1125148017Semax decl.SetColumn(form_value.Unsigned()); 1126148017Semax break; 1127148017Semax case DW_AT_name: 1128148017Semax type_name_cstr = form_value.AsCString(); 1129148017Semax type_name_const_str.SetCString(type_name_cstr); 1130148017Semax break; 1131148017Semax 1132148017Semax case DW_AT_linkage_name: 1133148017Semax case DW_AT_MIPS_linkage_name: 1134148017Semax break; // mangled = 1135148017Semax // form_value.AsCString(&dwarf->get_debug_str_data()); 1136148017Semax // break; 1137148017Semax case DW_AT_type: 1138148017Semax type_die_form = form_value; 1139148017Semax break; 1140148017Semax case DW_AT_accessibility: 1141148017Semax accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 1142148017Semax break; 1143148017Semax case DW_AT_declaration: 1144148017Semax break; // is_forward_declaration = form_value.Boolean(); break; 1145148017Semax case DW_AT_inline: 1146148017Semax is_inline = form_value.Boolean(); 1147148017Semax break; 1148148017Semax case DW_AT_virtuality: 1149148017Semax is_virtual = form_value.Boolean(); 115077394Ssobomax break; 1151201387Sed case DW_AT_explicit: 11522088Ssos is_explicit = form_value.Boolean(); 115329603Scharnier break; 1154148017Semax case DW_AT_artificial: 115529603Scharnier is_artificial = form_value.Boolean(); 115677329Sdes break; 115729603Scharnier 11582088Ssos case DW_AT_external: 11592088Ssos if (form_value.Unsigned()) { 11602088Ssos if (storage == clang::SC_None) 116151287Speter storage = clang::SC_Extern; 11622088Ssos else 11632088Ssos storage = clang::SC_PrivateExtern; 11642088Ssos } 11652088Ssos break; 1166148017Semax 11672088Ssos case DW_AT_specification: 1168148017Semax specification_die_form = form_value; 1169148017Semax break; 1170148017Semax 1171148017Semax case DW_AT_abstract_origin: 117277329Sdes abstract_origin_die_form = form_value; 117377329Sdes break; 117477329Sdes 117577329Sdes case DW_AT_object_pointer: 117677329Sdes object_pointer_die_offset = form_value.Reference(); 117777329Sdes break; 117877329Sdes 117977329Sdes case DW_AT_allocated: 118077329Sdes case DW_AT_associated: 118177329Sdes case DW_AT_address_class: 118277329Sdes case DW_AT_calling_convention: 118377329Sdes case DW_AT_data_location: 118477329Sdes case DW_AT_elemental: 118577329Sdes case DW_AT_entry_pc: 118677329Sdes case DW_AT_frame_base: 118777329Sdes case DW_AT_high_pc: 118877329Sdes case DW_AT_low_pc: 118977329Sdes case DW_AT_prototyped: 119077329Sdes case DW_AT_pure: 119177329Sdes case DW_AT_ranges: 119277329Sdes case DW_AT_recursive: 119377329Sdes case DW_AT_return_addr: 119477329Sdes case DW_AT_segment: 119577329Sdes case DW_AT_start_scope: 119677329Sdes case DW_AT_static_link: 119777329Sdes case DW_AT_trampoline: 119877329Sdes case DW_AT_visibility: 119977329Sdes case DW_AT_vtable_elem_location: 120077329Sdes case DW_AT_description: 120177329Sdes case DW_AT_sibling: 120277329Sdes break; 120377329Sdes } 120477329Sdes } 120577329Sdes } 120677329Sdes } 120777329Sdes 12082088Ssos std::string object_pointer_name; 120929603Scharnier if (object_pointer_die_offset != DW_INVALID_OFFSET) { 12102088Ssos DWARFDIE object_pointer_die = die.GetDIE(object_pointer_die_offset); 12112088Ssos if (object_pointer_die) { 12122088Ssos const char *object_pointer_name_cstr = object_pointer_die.GetName(); 1213 if (object_pointer_name_cstr) 1214 object_pointer_name = object_pointer_name_cstr; 1215 } 1216 } 1217 1218 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1219 DW_TAG_value_to_name(tag), type_name_cstr); 1220 1221 CompilerType return_clang_type; 1222 Type *func_type = NULL; 1223 1224 if (type_die_form.IsValid()) 1225 func_type = dwarf->ResolveTypeUID(DIERef(type_die_form)); 1226 1227 if (func_type) 1228 return_clang_type = func_type->GetForwardCompilerType(); 1229 else 1230 return_clang_type = m_ast.GetBasicType(eBasicTypeVoid); 1231 1232 std::vector<CompilerType> function_param_types; 1233 std::vector<clang::ParmVarDecl *> function_param_decls; 1234 1235 // Parse the function children for the parameters 1236 1237 DWARFDIE decl_ctx_die; 1238 clang::DeclContext *containing_decl_ctx = 1239 GetClangDeclContextContainingDIE(die, &decl_ctx_die); 1240 const clang::Decl::Kind containing_decl_kind = 1241 containing_decl_ctx->getDeclKind(); 1242 1243 bool is_cxx_method = DeclKindIsCXXClass(containing_decl_kind); 1244 // Start off static. This will be set to false in 1245 // ParseChildParameters(...) 1246 // if we find a "this" parameters as the first parameter 1247 if (is_cxx_method) { 1248 is_static = true; 1249 } 1250 1251 if (die.HasChildren()) { 1252 bool skip_artificial = true; 1253 ParseChildParameters(sc, containing_decl_ctx, die, skip_artificial, 1254 is_static, is_variadic, has_template_params, 1255 function_param_types, function_param_decls, 1256 type_quals); 1257 } 1258 1259 bool ignore_containing_context = false; 1260 // Check for templatized class member functions. If we had any 1261 // DW_TAG_template_type_parameter 1262 // or DW_TAG_template_value_parameter the DW_TAG_subprogram DIE, then we 1263 // can't let this become 1264 // a method in a class. Why? Because templatized functions are only 1265 // emitted if one of the 1266 // templatized methods is used in the current compile unit and we will 1267 // end up with classes 1268 // that may or may not include these member functions and this means one 1269 // class won't match another 1270 // class definition and it affects our ability to use a class in the 1271 // clang expression parser. So 1272 // for the greater good, we currently must not allow any template member 1273 // functions in a class definition. 1274 if (is_cxx_method && has_template_params) { 1275 ignore_containing_context = true; 1276 is_cxx_method = false; 1277 } 1278 1279 // clang_type will get the function prototype clang type after this call 1280 clang_type = m_ast.CreateFunctionType( 1281 return_clang_type, function_param_types.data(), 1282 function_param_types.size(), is_variadic, type_quals); 1283 1284 if (type_name_cstr) { 1285 bool type_handled = false; 1286 if (tag == DW_TAG_subprogram || tag == DW_TAG_inlined_subroutine) { 1287 ObjCLanguage::MethodName objc_method(type_name_cstr, true); 1288 if (objc_method.IsValid(true)) { 1289 CompilerType class_opaque_type; 1290 ConstString class_name(objc_method.GetClassName()); 1291 if (class_name) { 1292 TypeSP complete_objc_class_type_sp( 1293 dwarf->FindCompleteObjCDefinitionTypeForDIE( 1294 DWARFDIE(), class_name, false)); 1295 1296 if (complete_objc_class_type_sp) { 1297 CompilerType type_clang_forward_type = 1298 complete_objc_class_type_sp->GetForwardCompilerType(); 1299 if (ClangASTContext::IsObjCObjectOrInterfaceType( 1300 type_clang_forward_type)) 1301 class_opaque_type = type_clang_forward_type; 1302 } 1303 } 1304 1305 if (class_opaque_type) { 1306 // If accessibility isn't set to anything valid, assume public 1307 // for 1308 // now... 1309 if (accessibility == eAccessNone) 1310 accessibility = eAccessPublic; 1311 1312 clang::ObjCMethodDecl *objc_method_decl = 1313 m_ast.AddMethodToObjCObjectType( 1314 class_opaque_type, type_name_cstr, clang_type, 1315 accessibility, is_artificial, is_variadic); 1316 type_handled = objc_method_decl != NULL; 1317 if (type_handled) { 1318 LinkDeclContextToDIE( 1319 ClangASTContext::GetAsDeclContext(objc_method_decl), die); 1320 m_ast.SetMetadataAsUserID(objc_method_decl, die.GetID()); 1321 } else { 1322 dwarf->GetObjectFile()->GetModule()->ReportError( 1323 "{0x%8.8x}: invalid Objective-C method 0x%4.4x (%s), " 1324 "please file a bug and attach the file at the start of " 1325 "this error message", 1326 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 1327 } 1328 } 1329 } else if (is_cxx_method) { 1330 // Look at the parent of this DIE and see if is is 1331 // a class or struct and see if this is actually a 1332 // C++ method 1333 Type *class_type = dwarf->ResolveType(decl_ctx_die); 1334 if (class_type) { 1335 bool alternate_defn = false; 1336 if (class_type->GetID() != decl_ctx_die.GetID() || 1337 decl_ctx_die.GetContainingDWOModuleDIE()) { 1338 alternate_defn = true; 1339 1340 // We uniqued the parent class of this function to another 1341 // class 1342 // so we now need to associate all dies under "decl_ctx_die" 1343 // to 1344 // DIEs in the DIE for "class_type"... 1345 SymbolFileDWARF *class_symfile = NULL; 1346 DWARFDIE class_type_die; 1347 1348 SymbolFileDWARFDebugMap *debug_map_symfile = 1349 dwarf->GetDebugMapSymfile(); 1350 if (debug_map_symfile) { 1351 class_symfile = debug_map_symfile->GetSymbolFileByOSOIndex( 1352 SymbolFileDWARFDebugMap::GetOSOIndexFromUserID( 1353 class_type->GetID())); 1354 class_type_die = class_symfile->DebugInfo()->GetDIE( 1355 DIERef(class_type->GetID(), dwarf)); 1356 } else { 1357 class_symfile = dwarf; 1358 class_type_die = dwarf->DebugInfo()->GetDIE( 1359 DIERef(class_type->GetID(), dwarf)); 1360 } 1361 if (class_type_die) { 1362 DWARFDIECollection failures; 1363 1364 CopyUniqueClassMethodTypes(decl_ctx_die, class_type_die, 1365 class_type, failures); 1366 1367 // FIXME do something with these failures that's smarter 1368 // than 1369 // just dropping them on the ground. Unfortunately classes 1370 // don't 1371 // like having stuff added to them after their definitions 1372 // are 1373 // complete... 1374 1375 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1376 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1377 type_sp = type_ptr->shared_from_this(); 1378 break; 1379 } 1380 } 1381 } 1382 1383 if (specification_die_form.IsValid()) { 1384 // We have a specification which we are going to base our 1385 // function 1386 // prototype off of, so we need this type to be completed so 1387 // that the 1388 // m_die_to_decl_ctx for the method in the specification has a 1389 // valid 1390 // clang decl context. 1391 class_type->GetForwardCompilerType(); 1392 // If we have a specification, then the function type should 1393 // have been 1394 // made with the specification and not with this die. 1395 DWARFDIE spec_die = dwarf->DebugInfo()->GetDIE( 1396 DIERef(specification_die_form)); 1397 clang::DeclContext *spec_clang_decl_ctx = 1398 GetClangDeclContextForDIE(spec_die); 1399 if (spec_clang_decl_ctx) { 1400 LinkDeclContextToDIE(spec_clang_decl_ctx, die); 1401 } else { 1402 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1403 "0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8" PRIx64 1404 ") has no decl\n", 1405 die.GetID(), specification_die_form.Reference()); 1406 } 1407 type_handled = true; 1408 } else if (abstract_origin_die_form.IsValid()) { 1409 // We have a specification which we are going to base our 1410 // function 1411 // prototype off of, so we need this type to be completed so 1412 // that the 1413 // m_die_to_decl_ctx for the method in the abstract origin has 1414 // a valid 1415 // clang decl context. 1416 class_type->GetForwardCompilerType(); 1417 1418 DWARFDIE abs_die = dwarf->DebugInfo()->GetDIE( 1419 DIERef(abstract_origin_die_form)); 1420 clang::DeclContext *abs_clang_decl_ctx = 1421 GetClangDeclContextForDIE(abs_die); 1422 if (abs_clang_decl_ctx) { 1423 LinkDeclContextToDIE(abs_clang_decl_ctx, die); 1424 } else { 1425 dwarf->GetObjectFile()->GetModule()->ReportWarning( 1426 "0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8" PRIx64 1427 ") has no decl\n", 1428 die.GetID(), abstract_origin_die_form.Reference()); 1429 } 1430 type_handled = true; 1431 } else { 1432 CompilerType class_opaque_type = 1433 class_type->GetForwardCompilerType(); 1434 if (ClangASTContext::IsCXXClassType(class_opaque_type)) { 1435 if (class_opaque_type.IsBeingDefined() || alternate_defn) { 1436 if (!is_static && !die.HasChildren()) { 1437 // We have a C++ member function with no children (this 1438 // pointer!) 1439 // and clang will get mad if we try and make a function 1440 // that isn't 1441 // well formed in the DWARF, so we will just skip it... 1442 type_handled = true; 1443 } else { 1444 bool add_method = true; 1445 if (alternate_defn) { 1446 // If an alternate definition for the class exists, 1447 // then add the method only if an 1448 // equivalent is not already present. 1449 clang::CXXRecordDecl *record_decl = 1450 m_ast.GetAsCXXRecordDecl( 1451 class_opaque_type.GetOpaqueQualType()); 1452 if (record_decl) { 1453 for (auto method_iter = record_decl->method_begin(); 1454 method_iter != record_decl->method_end(); 1455 method_iter++) { 1456 clang::CXXMethodDecl *method_decl = *method_iter; 1457 if (method_decl->getNameInfo().getAsString() == 1458 std::string(type_name_cstr)) { 1459 if (method_decl->getType() == 1460 ClangUtil::GetQualType(clang_type)) { 1461 add_method = false; 1462 LinkDeclContextToDIE( 1463 ClangASTContext::GetAsDeclContext( 1464 method_decl), 1465 die); 1466 type_handled = true; 1467 1468 break; 1469 } 1470 } 1471 } 1472 } 1473 } 1474 1475 if (add_method) { 1476 llvm::PrettyStackTraceFormat stack_trace( 1477 "SymbolFileDWARF::ParseType() is adding a method " 1478 "%s to class %s in DIE 0x%8.8" PRIx64 " from %s", 1479 type_name_cstr, 1480 class_type->GetName().GetCString(), die.GetID(), 1481 dwarf->GetObjectFile() 1482 ->GetFileSpec() 1483 .GetPath() 1484 .c_str()); 1485 1486 const bool is_attr_used = false; 1487 // Neither GCC 4.2 nor clang++ currently set a valid 1488 // accessibility 1489 // in the DWARF for C++ methods... Default to public 1490 // for now... 1491 if (accessibility == eAccessNone) 1492 accessibility = eAccessPublic; 1493 1494 clang::CXXMethodDecl *cxx_method_decl = 1495 m_ast.AddMethodToCXXRecordType( 1496 class_opaque_type.GetOpaqueQualType(), 1497 type_name_cstr, clang_type, accessibility, 1498 is_virtual, is_static, is_inline, is_explicit, 1499 is_attr_used, is_artificial); 1500 1501 type_handled = cxx_method_decl != NULL; 1502 1503 if (type_handled) { 1504 LinkDeclContextToDIE( 1505 ClangASTContext::GetAsDeclContext( 1506 cxx_method_decl), 1507 die); 1508 1509 ClangASTMetadata metadata; 1510 metadata.SetUserID(die.GetID()); 1511 1512 if (!object_pointer_name.empty()) { 1513 metadata.SetObjectPtrName( 1514 object_pointer_name.c_str()); 1515 if (log) 1516 log->Printf( 1517 "Setting object pointer name: %s on method " 1518 "object %p.\n", 1519 object_pointer_name.c_str(), 1520 static_cast<void *>(cxx_method_decl)); 1521 } 1522 m_ast.SetMetadata(cxx_method_decl, metadata); 1523 } else { 1524 ignore_containing_context = true; 1525 } 1526 } 1527 } 1528 } else { 1529 // We were asked to parse the type for a method in a 1530 // class, yet the 1531 // class hasn't been asked to complete itself through the 1532 // clang::ExternalASTSource protocol, so we need to just 1533 // have the 1534 // class complete itself and do things the right way, then 1535 // our 1536 // DIE should then have an entry in the 1537 // dwarf->GetDIEToType() map. First 1538 // we need to modify the dwarf->GetDIEToType() so it 1539 // doesn't think we are 1540 // trying to parse this DIE anymore... 1541 dwarf->GetDIEToType()[die.GetDIE()] = NULL; 1542 1543 // Now we get the full type to force our class type to 1544 // complete itself 1545 // using the clang::ExternalASTSource protocol which will 1546 // parse all 1547 // base classes and all methods (including the method for 1548 // this DIE). 1549 class_type->GetFullCompilerType(); 1550 1551 // The type for this DIE should have been filled in the 1552 // function call above 1553 type_ptr = dwarf->GetDIEToType()[die.GetDIE()]; 1554 if (type_ptr && type_ptr != DIE_IS_BEING_PARSED) { 1555 type_sp = type_ptr->shared_from_this(); 1556 break; 1557 } 1558 1559 // FIXME This is fixing some even uglier behavior but we 1560 // really need to 1561 // uniq the methods of each class as well as the class 1562 // itself. 1563 // <rdar://problem/11240464> 1564 type_handled = true; 1565 } 1566 } 1567 } 1568 } 1569 } 1570 } 1571 1572 if (!type_handled) { 1573 clang::FunctionDecl *function_decl = nullptr; 1574 1575 if (abstract_origin_die_form.IsValid()) { 1576 DWARFDIE abs_die = 1577 dwarf->DebugInfo()->GetDIE(DIERef(abstract_origin_die_form)); 1578 1579 SymbolContext sc; 1580 1581 if (dwarf->ResolveType(abs_die)) { 1582 function_decl = llvm::dyn_cast_or_null<clang::FunctionDecl>( 1583 GetCachedClangDeclContextForDIE(abs_die)); 1584 1585 if (function_decl) { 1586 LinkDeclContextToDIE(function_decl, die); 1587 } 1588 } 1589 } 1590 1591 if (!function_decl) { 1592 // We just have a function that isn't part of a class 1593 function_decl = m_ast.CreateFunctionDeclaration( 1594 ignore_containing_context ? m_ast.GetTranslationUnitDecl() 1595 : containing_decl_ctx, 1596 type_name_cstr, clang_type, storage, is_inline); 1597 1598 if (has_template_params) { 1599 ClangASTContext::TemplateParameterInfos template_param_infos; 1600 ParseTemplateParameterInfos(die, template_param_infos); 1601 clang::FunctionTemplateDecl *func_template_decl = 1602 m_ast.CreateFunctionTemplateDecl( 1603 containing_decl_ctx, function_decl, type_name_cstr, 1604 template_param_infos); 1605 m_ast.CreateFunctionTemplateSpecializationInfo( 1606 function_decl, func_template_decl, template_param_infos); 1607 } 1608 1609 lldbassert(function_decl); 1610 1611 if (function_decl) { 1612 LinkDeclContextToDIE(function_decl, die); 1613 1614 if (!function_param_decls.empty()) 1615 m_ast.SetFunctionParameters(function_decl, 1616 &function_param_decls.front(), 1617 function_param_decls.size()); 1618 1619 ClangASTMetadata metadata; 1620 metadata.SetUserID(die.GetID()); 1621 1622 if (!object_pointer_name.empty()) { 1623 metadata.SetObjectPtrName(object_pointer_name.c_str()); 1624 if (log) 1625 log->Printf("Setting object pointer name: %s on function " 1626 "object %p.", 1627 object_pointer_name.c_str(), 1628 static_cast<void *>(function_decl)); 1629 } 1630 m_ast.SetMetadata(function_decl, metadata); 1631 } 1632 } 1633 } 1634 } 1635 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, 0, NULL, 1636 LLDB_INVALID_UID, Type::eEncodingIsUID, &decl, 1637 clang_type, Type::eResolveStateFull)); 1638 assert(type_sp.get()); 1639 } break; 1640 1641 case DW_TAG_array_type: { 1642 // Set a bit that lets us know that we are currently parsing this 1643 dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED; 1644 1645 DWARFFormValue type_die_form; 1646 int64_t first_index = 0; 1647 uint32_t byte_stride = 0; 1648 uint32_t bit_stride = 0; 1649 bool is_vector = false; 1650 const size_t num_attributes = die.GetAttributes(attributes); 1651 1652 if (num_attributes > 0) { 1653 uint32_t i; 1654 for (i = 0; i < num_attributes; ++i) { 1655 attr = attributes.AttributeAtIndex(i); 1656 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1657 switch (attr) { 1658 case DW_AT_decl_file: 1659 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 1660 form_value.Unsigned())); 1661 break; 1662 case DW_AT_decl_line: 1663 decl.SetLine(form_value.Unsigned()); 1664 break; 1665 case DW_AT_decl_column: 1666 decl.SetColumn(form_value.Unsigned()); 1667 break; 1668 case DW_AT_name: 1669 type_name_cstr = form_value.AsCString(); 1670 type_name_const_str.SetCString(type_name_cstr); 1671 break; 1672 1673 case DW_AT_type: 1674 type_die_form = form_value; 1675 break; 1676 case DW_AT_byte_size: 1677 break; // byte_size = form_value.Unsigned(); break; 1678 case DW_AT_byte_stride: 1679 byte_stride = form_value.Unsigned(); 1680 break; 1681 case DW_AT_bit_stride: 1682 bit_stride = form_value.Unsigned(); 1683 break; 1684 case DW_AT_GNU_vector: 1685 is_vector = form_value.Boolean(); 1686 break; 1687 case DW_AT_accessibility: 1688 break; // accessibility = 1689 // DW_ACCESS_to_AccessType(form_value.Unsigned()); break; 1690 case DW_AT_declaration: 1691 break; // is_forward_declaration = form_value.Boolean(); break; 1692 case DW_AT_allocated: 1693 case DW_AT_associated: 1694 case DW_AT_data_location: 1695 case DW_AT_description: 1696 case DW_AT_ordering: 1697 case DW_AT_start_scope: 1698 case DW_AT_visibility: 1699 case DW_AT_specification: 1700 case DW_AT_abstract_origin: 1701 case DW_AT_sibling: 1702 break; 1703 } 1704 } 1705 } 1706 1707 DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 1708 DW_TAG_value_to_name(tag), type_name_cstr); 1709 1710 DIERef type_die_ref(type_die_form); 1711 Type *element_type = dwarf->ResolveTypeUID(type_die_ref); 1712 1713 if (element_type) { 1714 std::vector<uint64_t> element_orders; 1715 ParseChildArrayInfo(sc, die, first_index, element_orders, 1716 byte_stride, bit_stride); 1717 if (byte_stride == 0 && bit_stride == 0) 1718 byte_stride = element_type->GetByteSize(); 1719 CompilerType array_element_type = 1720 element_type->GetForwardCompilerType(); 1721 1722 if (ClangASTContext::IsCXXClassType(array_element_type) && 1723 array_element_type.GetCompleteType() == false) { 1724 ModuleSP module_sp = die.GetModule(); 1725 if (module_sp) { 1726 if (die.GetCU()->GetProducer() == 1727 DWARFCompileUnit::eProducerClang) 1728 module_sp->ReportError( 1729 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a " 1730 "class/union/struct element type DIE 0x%8.8x that is a " 1731 "forward declaration, not a complete definition.\nTry " 1732 "compiling the source file with -fno-limit-debug-info or " 1733 "disable -gmodule", 1734 die.GetOffset(), type_die_ref.die_offset); 1735 else 1736 module_sp->ReportError( 1737 "DWARF DW_TAG_array_type DIE at 0x%8.8x has a " 1738 "class/union/struct element type DIE 0x%8.8x that is a " 1739 "forward declaration, not a complete definition.\nPlease " 1740 "file a bug against the compiler and include the " 1741 "preprocessed output for %s", 1742 die.GetOffset(), type_die_ref.die_offset, 1743 die.GetLLDBCompileUnit() 1744 ? die.GetLLDBCompileUnit()->GetPath().c_str() 1745 : "the source file"); 1746 } 1747 1748 // We have no choice other than to pretend that the element class 1749 // type 1750 // is complete. If we don't do this, clang will crash when trying 1751 // to layout the class. Since we provide layout assistance, all 1752 // ivars in this class and other classes will be fine, this is 1753 // the best we can do short of crashing. 1754 if (ClangASTContext::StartTagDeclarationDefinition( 1755 array_element_type)) { 1756 ClangASTContext::CompleteTagDeclarationDefinition( 1757 array_element_type); 1758 } else { 1759 module_sp->ReportError("DWARF DIE at 0x%8.8x was not able to " 1760 "start its definition.\nPlease file a " 1761 "bug and attach the file at the start " 1762 "of this error message", 1763 type_die_ref.die_offset); 1764 } 1765 } 1766 1767 uint64_t array_element_bit_stride = byte_stride * 8 + bit_stride; 1768 if (element_orders.size() > 0) { 1769 uint64_t num_elements = 0; 1770 std::vector<uint64_t>::const_reverse_iterator pos; 1771 std::vector<uint64_t>::const_reverse_iterator end = 1772 element_orders.rend(); 1773 for (pos = element_orders.rbegin(); pos != end; ++pos) { 1774 num_elements = *pos; 1775 clang_type = m_ast.CreateArrayType(array_element_type, 1776 num_elements, is_vector); 1777 array_element_type = clang_type; 1778 array_element_bit_stride = 1779 num_elements ? array_element_bit_stride * num_elements 1780 : array_element_bit_stride; 1781 } 1782 } else { 1783 clang_type = 1784 m_ast.CreateArrayType(array_element_type, 0, is_vector); 1785 } 1786 ConstString empty_name; 1787 type_sp.reset(new Type( 1788 die.GetID(), dwarf, empty_name, array_element_bit_stride / 8, 1789 NULL, DIERef(type_die_form).GetUID(dwarf), Type::eEncodingIsUID, 1790 &decl, clang_type, Type::eResolveStateFull)); 1791 type_sp->SetEncodingType(element_type); 1792 } 1793 } 1794 } break; 1795 1796 case DW_TAG_ptr_to_member_type: { 1797 DWARFFormValue type_die_form; 1798 DWARFFormValue containing_type_die_form; 1799 1800 const size_t num_attributes = die.GetAttributes(attributes); 1801 1802 if (num_attributes > 0) { 1803 uint32_t i; 1804 for (i = 0; i < num_attributes; ++i) { 1805 attr = attributes.AttributeAtIndex(i); 1806 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1807 switch (attr) { 1808 case DW_AT_type: 1809 type_die_form = form_value; 1810 break; 1811 case DW_AT_containing_type: 1812 containing_type_die_form = form_value; 1813 break; 1814 } 1815 } 1816 } 1817 1818 Type *pointee_type = dwarf->ResolveTypeUID(DIERef(type_die_form)); 1819 Type *class_type = 1820 dwarf->ResolveTypeUID(DIERef(containing_type_die_form)); 1821 1822 CompilerType pointee_clang_type = 1823 pointee_type->GetForwardCompilerType(); 1824 CompilerType class_clang_type = class_type->GetLayoutCompilerType(); 1825 1826 clang_type = ClangASTContext::CreateMemberPointerType( 1827 class_clang_type, pointee_clang_type); 1828 1829 byte_size = clang_type.GetByteSize(nullptr); 1830 1831 type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, 1832 byte_size, NULL, LLDB_INVALID_UID, 1833 Type::eEncodingIsUID, NULL, clang_type, 1834 Type::eResolveStateForward)); 1835 } 1836 1837 break; 1838 } 1839 default: 1840 dwarf->GetObjectFile()->GetModule()->ReportError( 1841 "{0x%8.8x}: unhandled type tag 0x%4.4x (%s), please file a bug and " 1842 "attach the file at the start of this error message", 1843 die.GetOffset(), tag, DW_TAG_value_to_name(tag)); 1844 break; 1845 } 1846 1847 if (type_sp.get()) { 1848 DWARFDIE sc_parent_die = 1849 SymbolFileDWARF::GetParentSymbolContextDIE(die); 1850 dw_tag_t sc_parent_tag = sc_parent_die.Tag(); 1851 1852 SymbolContextScope *symbol_context_scope = NULL; 1853 if (sc_parent_tag == DW_TAG_compile_unit) { 1854 symbol_context_scope = sc.comp_unit; 1855 } else if (sc.function != NULL && sc_parent_die) { 1856 symbol_context_scope = 1857 sc.function->GetBlock(true).FindBlockByID(sc_parent_die.GetID()); 1858 if (symbol_context_scope == NULL) 1859 symbol_context_scope = sc.function; 1860 } 1861 1862 if (symbol_context_scope != NULL) { 1863 type_sp->SetSymbolContextScope(symbol_context_scope); 1864 } 1865 1866 // We are ready to put this type into the uniqued list up at the module 1867 // level 1868 type_list->Insert(type_sp); 1869 1870 dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get(); 1871 } 1872 } else if (type_ptr != DIE_IS_BEING_PARSED) { 1873 type_sp = type_ptr->shared_from_this(); 1874 } 1875 } 1876 return type_sp; 1877} 1878 1879// DWARF parsing functions 1880 1881class DWARFASTParserClang::DelayedAddObjCClassProperty { 1882public: 1883 DelayedAddObjCClassProperty( 1884 const CompilerType &class_opaque_type, const char *property_name, 1885 const CompilerType &property_opaque_type, // The property type is only 1886 // required if you don't have an 1887 // ivar decl 1888 clang::ObjCIvarDecl *ivar_decl, const char *property_setter_name, 1889 const char *property_getter_name, uint32_t property_attributes, 1890 const ClangASTMetadata *metadata) 1891 : m_class_opaque_type(class_opaque_type), m_property_name(property_name), 1892 m_property_opaque_type(property_opaque_type), m_ivar_decl(ivar_decl), 1893 m_property_setter_name(property_setter_name), 1894 m_property_getter_name(property_getter_name), 1895 m_property_attributes(property_attributes) { 1896 if (metadata != NULL) { 1897 m_metadata_ap.reset(new ClangASTMetadata()); 1898 *m_metadata_ap = *metadata; 1899 } 1900 } 1901 1902 DelayedAddObjCClassProperty(const DelayedAddObjCClassProperty &rhs) { 1903 *this = rhs; 1904 } 1905 1906 DelayedAddObjCClassProperty & 1907 operator=(const DelayedAddObjCClassProperty &rhs) { 1908 m_class_opaque_type = rhs.m_class_opaque_type; 1909 m_property_name = rhs.m_property_name; 1910 m_property_opaque_type = rhs.m_property_opaque_type; 1911 m_ivar_decl = rhs.m_ivar_decl; 1912 m_property_setter_name = rhs.m_property_setter_name; 1913 m_property_getter_name = rhs.m_property_getter_name; 1914 m_property_attributes = rhs.m_property_attributes; 1915 1916 if (rhs.m_metadata_ap.get()) { 1917 m_metadata_ap.reset(new ClangASTMetadata()); 1918 *m_metadata_ap = *rhs.m_metadata_ap; 1919 } 1920 return *this; 1921 } 1922 1923 bool Finalize() { 1924 return ClangASTContext::AddObjCClassProperty( 1925 m_class_opaque_type, m_property_name, m_property_opaque_type, 1926 m_ivar_decl, m_property_setter_name, m_property_getter_name, 1927 m_property_attributes, m_metadata_ap.get()); 1928 } 1929 1930private: 1931 CompilerType m_class_opaque_type; 1932 const char *m_property_name; 1933 CompilerType m_property_opaque_type; 1934 clang::ObjCIvarDecl *m_ivar_decl; 1935 const char *m_property_setter_name; 1936 const char *m_property_getter_name; 1937 uint32_t m_property_attributes; 1938 std::unique_ptr<ClangASTMetadata> m_metadata_ap; 1939}; 1940 1941bool DWARFASTParserClang::ParseTemplateDIE( 1942 const DWARFDIE &die, 1943 ClangASTContext::TemplateParameterInfos &template_param_infos) { 1944 const dw_tag_t tag = die.Tag(); 1945 1946 switch (tag) { 1947 case DW_TAG_GNU_template_parameter_pack: { 1948 template_param_infos.packed_args.reset( 1949 new ClangASTContext::TemplateParameterInfos); 1950 for (DWARFDIE child_die = die.GetFirstChild(); child_die.IsValid(); 1951 child_die = child_die.GetSibling()) { 1952 if (!ParseTemplateDIE(child_die, *template_param_infos.packed_args)) 1953 return false; 1954 } 1955 if (const char *name = die.GetName()) { 1956 template_param_infos.pack_name = name; 1957 } 1958 return true; 1959 } 1960 case DW_TAG_template_type_parameter: 1961 case DW_TAG_template_value_parameter: { 1962 DWARFAttributes attributes; 1963 const size_t num_attributes = die.GetAttributes(attributes); 1964 const char *name = nullptr; 1965 CompilerType clang_type; 1966 uint64_t uval64 = 0; 1967 bool uval64_valid = false; 1968 if (num_attributes > 0) { 1969 DWARFFormValue form_value; 1970 for (size_t i = 0; i < num_attributes; ++i) { 1971 const dw_attr_t attr = attributes.AttributeAtIndex(i); 1972 1973 switch (attr) { 1974 case DW_AT_name: 1975 if (attributes.ExtractFormValueAtIndex(i, form_value)) 1976 name = form_value.AsCString(); 1977 break; 1978 1979 case DW_AT_type: 1980 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1981 Type *lldb_type = die.ResolveTypeUID(DIERef(form_value)); 1982 if (lldb_type) 1983 clang_type = lldb_type->GetForwardCompilerType(); 1984 } 1985 break; 1986 1987 case DW_AT_const_value: 1988 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 1989 uval64_valid = true; 1990 uval64 = form_value.Unsigned(); 1991 } 1992 break; 1993 default: 1994 break; 1995 } 1996 } 1997 1998 clang::ASTContext *ast = m_ast.getASTContext(); 1999 if (!clang_type) 2000 clang_type = m_ast.GetBasicType(eBasicTypeVoid); 2001 2002 if (clang_type) { 2003 bool is_signed = false; 2004 if (name && name[0]) 2005 template_param_infos.names.push_back(name); 2006 else 2007 template_param_infos.names.push_back(NULL); 2008 2009 // Get the signed value for any integer or enumeration if available 2010 clang_type.IsIntegerOrEnumerationType(is_signed); 2011 2012 if (tag == DW_TAG_template_value_parameter && uval64_valid) { 2013 llvm::APInt apint(clang_type.GetBitSize(nullptr), uval64, is_signed); 2014 template_param_infos.args.push_back( 2015 clang::TemplateArgument(*ast, llvm::APSInt(apint, !is_signed), 2016 ClangUtil::GetQualType(clang_type))); 2017 } else { 2018 template_param_infos.args.push_back( 2019 clang::TemplateArgument(ClangUtil::GetQualType(clang_type))); 2020 } 2021 } else { 2022 return false; 2023 } 2024 } 2025 } 2026 return true; 2027 2028 default: 2029 break; 2030 } 2031 return false; 2032} 2033 2034bool DWARFASTParserClang::ParseTemplateParameterInfos( 2035 const DWARFDIE &parent_die, 2036 ClangASTContext::TemplateParameterInfos &template_param_infos) { 2037 2038 if (!parent_die) 2039 return false; 2040 2041 Args template_parameter_names; 2042 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2043 die = die.GetSibling()) { 2044 const dw_tag_t tag = die.Tag(); 2045 2046 switch (tag) { 2047 case DW_TAG_template_type_parameter: 2048 case DW_TAG_template_value_parameter: 2049 case DW_TAG_GNU_template_parameter_pack: 2050 ParseTemplateDIE(die, template_param_infos); 2051 break; 2052 2053 default: 2054 break; 2055 } 2056 } 2057 if (template_param_infos.args.empty()) 2058 return false; 2059 return template_param_infos.args.size() == template_param_infos.names.size(); 2060} 2061 2062bool DWARFASTParserClang::CompleteTypeFromDWARF(const DWARFDIE &die, 2063 lldb_private::Type *type, 2064 CompilerType &clang_type) { 2065 SymbolFileDWARF *dwarf = die.GetDWARF(); 2066 2067 std::lock_guard<std::recursive_mutex> guard( 2068 dwarf->GetObjectFile()->GetModule()->GetMutex()); 2069 2070 // Disable external storage for this type so we don't get anymore 2071 // clang::ExternalASTSource queries for this type. 2072 m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), false); 2073 2074 if (!die) 2075 return false; 2076 2077#if defined LLDB_CONFIGURATION_DEBUG 2078 //---------------------------------------------------------------------- 2079 // For debugging purposes, the LLDB_DWARF_DONT_COMPLETE_TYPENAMES 2080 // environment variable can be set with one or more typenames separated 2081 // by ';' characters. This will cause this function to not complete any 2082 // types whose names match. 2083 // 2084 // Examples of setting this environment variable: 2085 // 2086 // LLDB_DWARF_DONT_COMPLETE_TYPENAMES=Foo 2087 // LLDB_DWARF_DONT_COMPLETE_TYPENAMES=Foo;Bar;Baz 2088 //---------------------------------------------------------------------- 2089 const char *dont_complete_typenames_cstr = 2090 getenv("LLDB_DWARF_DONT_COMPLETE_TYPENAMES"); 2091 if (dont_complete_typenames_cstr && dont_complete_typenames_cstr[0]) { 2092 const char *die_name = die.GetName(); 2093 if (die_name && die_name[0]) { 2094 const char *match = strstr(dont_complete_typenames_cstr, die_name); 2095 if (match) { 2096 size_t die_name_length = strlen(die_name); 2097 while (match) { 2098 const char separator_char = ';'; 2099 const char next_char = match[die_name_length]; 2100 if (next_char == '\0' || next_char == separator_char) { 2101 if (match == dont_complete_typenames_cstr || 2102 match[-1] == separator_char) 2103 return false; 2104 } 2105 match = strstr(match + 1, die_name); 2106 } 2107 } 2108 } 2109 } 2110#endif 2111 2112 const dw_tag_t tag = die.Tag(); 2113 2114 Log *log = 2115 nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION)); 2116 if (log) 2117 dwarf->GetObjectFile()->GetModule()->LogMessageVerboseBacktrace( 2118 log, "0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...", 2119 die.GetID(), die.GetTagAsCString(), type->GetName().AsCString()); 2120 assert(clang_type); 2121 DWARFAttributes attributes; 2122 switch (tag) { 2123 case DW_TAG_structure_type: 2124 case DW_TAG_union_type: 2125 case DW_TAG_class_type: { 2126 ClangASTImporter::LayoutInfo layout_info; 2127 2128 { 2129 if (die.HasChildren()) { 2130 LanguageType class_language = eLanguageTypeUnknown; 2131 if (ClangASTContext::IsObjCObjectOrInterfaceType(clang_type)) { 2132 class_language = eLanguageTypeObjC; 2133 // For objective C we don't start the definition when 2134 // the class is created. 2135 ClangASTContext::StartTagDeclarationDefinition(clang_type); 2136 } 2137 2138 int tag_decl_kind = -1; 2139 AccessType default_accessibility = eAccessNone; 2140 if (tag == DW_TAG_structure_type) { 2141 tag_decl_kind = clang::TTK_Struct; 2142 default_accessibility = eAccessPublic; 2143 } else if (tag == DW_TAG_union_type) { 2144 tag_decl_kind = clang::TTK_Union; 2145 default_accessibility = eAccessPublic; 2146 } else if (tag == DW_TAG_class_type) { 2147 tag_decl_kind = clang::TTK_Class; 2148 default_accessibility = eAccessPrivate; 2149 } 2150 2151 SymbolContext sc(die.GetLLDBCompileUnit()); 2152 std::vector<clang::CXXBaseSpecifier *> base_classes; 2153 std::vector<int> member_accessibilities; 2154 bool is_a_class = false; 2155 // Parse members and base classes first 2156 DWARFDIECollection member_function_dies; 2157 2158 DelayedPropertyList delayed_properties; 2159 ParseChildMembers(sc, die, clang_type, class_language, base_classes, 2160 member_accessibilities, member_function_dies, 2161 delayed_properties, default_accessibility, is_a_class, 2162 layout_info); 2163 2164 // Now parse any methods if there were any... 2165 size_t num_functions = member_function_dies.Size(); 2166 if (num_functions > 0) { 2167 for (size_t i = 0; i < num_functions; ++i) { 2168 dwarf->ResolveType(member_function_dies.GetDIEAtIndex(i)); 2169 } 2170 } 2171 2172 if (class_language == eLanguageTypeObjC) { 2173 ConstString class_name(clang_type.GetTypeName()); 2174 if (class_name) { 2175 DIEArray method_die_offsets; 2176 dwarf->GetObjCMethodDIEOffsets(class_name, method_die_offsets); 2177 2178 if (!method_die_offsets.empty()) { 2179 DWARFDebugInfo *debug_info = dwarf->DebugInfo(); 2180 2181 const size_t num_matches = method_die_offsets.size(); 2182 for (size_t i = 0; i < num_matches; ++i) { 2183 const DIERef &die_ref = method_die_offsets[i]; 2184 DWARFDIE method_die = debug_info->GetDIE(die_ref); 2185 2186 if (method_die) 2187 method_die.ResolveType(); 2188 } 2189 } 2190 2191 for (DelayedPropertyList::iterator pi = delayed_properties.begin(), 2192 pe = delayed_properties.end(); 2193 pi != pe; ++pi) 2194 pi->Finalize(); 2195 } 2196 } 2197 2198 // If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we 2199 // need to tell the clang type it is actually a class. 2200 if (class_language != eLanguageTypeObjC) { 2201 if (is_a_class && tag_decl_kind != clang::TTK_Class) 2202 m_ast.SetTagTypeKind(ClangUtil::GetQualType(clang_type), 2203 clang::TTK_Class); 2204 } 2205 2206 // Since DW_TAG_structure_type gets used for both classes 2207 // and structures, we may need to set any DW_TAG_member 2208 // fields to have a "private" access if none was specified. 2209 // When we parsed the child members we tracked that actual 2210 // accessibility value for each DW_TAG_member in the 2211 // "member_accessibilities" array. If the value for the 2212 // member is zero, then it was set to the "default_accessibility" 2213 // which for structs was "public". Below we correct this 2214 // by setting any fields to "private" that weren't correctly 2215 // set. 2216 if (is_a_class && !member_accessibilities.empty()) { 2217 // This is a class and all members that didn't have 2218 // their access specified are private. 2219 m_ast.SetDefaultAccessForRecordFields( 2220 m_ast.GetAsRecordDecl(clang_type), eAccessPrivate, 2221 &member_accessibilities.front(), member_accessibilities.size()); 2222 } 2223 2224 if (!base_classes.empty()) { 2225 // Make sure all base classes refer to complete types and not 2226 // forward declarations. If we don't do this, clang will crash 2227 // with an assertion in the call to 2228 // clang_type.SetBaseClassesForClassType() 2229 for (auto &base_class : base_classes) { 2230 clang::TypeSourceInfo *type_source_info = 2231 base_class->getTypeSourceInfo(); 2232 if (type_source_info) { 2233 CompilerType base_class_type( 2234 &m_ast, type_source_info->getType().getAsOpaquePtr()); 2235 if (base_class_type.GetCompleteType() == false) { 2236 auto module = dwarf->GetObjectFile()->GetModule(); 2237 module->ReportError(":: Class '%s' has a base class '%s' which " 2238 "does not have a complete definition.", 2239 die.GetName(), 2240 base_class_type.GetTypeName().GetCString()); 2241 if (die.GetCU()->GetProducer() == 2242 DWARFCompileUnit::eProducerClang) 2243 module->ReportError(":: Try compiling the source file with " 2244 "-fno-limit-debug-info."); 2245 2246 // We have no choice other than to pretend that the base class 2247 // is complete. If we don't do this, clang will crash when we 2248 // call setBases() inside of 2249 // "clang_type.SetBaseClassesForClassType()" 2250 // below. Since we provide layout assistance, all ivars in this 2251 // class and other classes will be fine, this is the best we can 2252 // do 2253 // short of crashing. 2254 if (ClangASTContext::StartTagDeclarationDefinition( 2255 base_class_type)) { 2256 ClangASTContext::CompleteTagDeclarationDefinition( 2257 base_class_type); 2258 } 2259 } 2260 } 2261 } 2262 m_ast.SetBaseClassesForClassType(clang_type.GetOpaqueQualType(), 2263 &base_classes.front(), 2264 base_classes.size()); 2265 2266 // Clang will copy each CXXBaseSpecifier in "base_classes" 2267 // so we have to free them all. 2268 ClangASTContext::DeleteBaseClassSpecifiers(&base_classes.front(), 2269 base_classes.size()); 2270 } 2271 } 2272 } 2273 2274 ClangASTContext::BuildIndirectFields(clang_type); 2275 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 2276 2277 if (!layout_info.field_offsets.empty() || 2278 !layout_info.base_offsets.empty() || 2279 !layout_info.vbase_offsets.empty()) { 2280 if (type) 2281 layout_info.bit_size = type->GetByteSize() * 8; 2282 if (layout_info.bit_size == 0) 2283 layout_info.bit_size = 2284 die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 0) * 8; 2285 2286 clang::CXXRecordDecl *record_decl = 2287 m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType()); 2288 if (record_decl) { 2289 if (log) { 2290 ModuleSP module_sp = dwarf->GetObjectFile()->GetModule(); 2291 2292 if (module_sp) { 2293 module_sp->LogMessage( 2294 log, 2295 "ClangASTContext::CompleteTypeFromDWARF (clang_type = %p) " 2296 "caching layout info for record_decl = %p, bit_size = %" PRIu64 2297 ", alignment = %" PRIu64 2298 ", field_offsets[%u], base_offsets[%u], vbase_offsets[%u])", 2299 static_cast<void *>(clang_type.GetOpaqueQualType()), 2300 static_cast<void *>(record_decl), layout_info.bit_size, 2301 layout_info.alignment, 2302 static_cast<uint32_t>(layout_info.field_offsets.size()), 2303 static_cast<uint32_t>(layout_info.base_offsets.size()), 2304 static_cast<uint32_t>(layout_info.vbase_offsets.size())); 2305 2306 uint32_t idx; 2307 { 2308 llvm::DenseMap<const clang::FieldDecl *, uint64_t>::const_iterator 2309 pos, 2310 end = layout_info.field_offsets.end(); 2311 for (idx = 0, pos = layout_info.field_offsets.begin(); pos != end; 2312 ++pos, ++idx) { 2313 module_sp->LogMessage( 2314 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2315 "%p) field[%u] = { bit_offset=%u, name='%s' }", 2316 static_cast<void *>(clang_type.GetOpaqueQualType()), idx, 2317 static_cast<uint32_t>(pos->second), 2318 pos->first->getNameAsString().c_str()); 2319 } 2320 } 2321 2322 { 2323 llvm::DenseMap<const clang::CXXRecordDecl *, 2324 clang::CharUnits>::const_iterator base_pos, 2325 base_end = layout_info.base_offsets.end(); 2326 for (idx = 0, base_pos = layout_info.base_offsets.begin(); 2327 base_pos != base_end; ++base_pos, ++idx) { 2328 module_sp->LogMessage( 2329 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2330 "%p) base[%u] = { byte_offset=%u, name='%s' }", 2331 clang_type.GetOpaqueQualType(), idx, 2332 (uint32_t)base_pos->second.getQuantity(), 2333 base_pos->first->getNameAsString().c_str()); 2334 } 2335 } 2336 { 2337 llvm::DenseMap<const clang::CXXRecordDecl *, 2338 clang::CharUnits>::const_iterator vbase_pos, 2339 vbase_end = layout_info.vbase_offsets.end(); 2340 for (idx = 0, vbase_pos = layout_info.vbase_offsets.begin(); 2341 vbase_pos != vbase_end; ++vbase_pos, ++idx) { 2342 module_sp->LogMessage( 2343 log, "ClangASTContext::CompleteTypeFromDWARF (clang_type = " 2344 "%p) vbase[%u] = { byte_offset=%u, name='%s' }", 2345 static_cast<void *>(clang_type.GetOpaqueQualType()), idx, 2346 static_cast<uint32_t>(vbase_pos->second.getQuantity()), 2347 vbase_pos->first->getNameAsString().c_str()); 2348 } 2349 } 2350 } 2351 } 2352 GetClangASTImporter().InsertRecordDecl(record_decl, layout_info); 2353 } 2354 } 2355 } 2356 2357 return (bool)clang_type; 2358 2359 case DW_TAG_enumeration_type: 2360 if (ClangASTContext::StartTagDeclarationDefinition(clang_type)) { 2361 if (die.HasChildren()) { 2362 SymbolContext sc(die.GetLLDBCompileUnit()); 2363 bool is_signed = false; 2364 clang_type.IsIntegerType(is_signed); 2365 ParseChildEnumerators(sc, clang_type, is_signed, type->GetByteSize(), 2366 die); 2367 } 2368 ClangASTContext::CompleteTagDeclarationDefinition(clang_type); 2369 } 2370 return (bool)clang_type; 2371 2372 default: 2373 assert(false && "not a forward clang type decl!"); 2374 break; 2375 } 2376 2377 return false; 2378} 2379 2380std::vector<DWARFDIE> DWARFASTParserClang::GetDIEForDeclContext( 2381 lldb_private::CompilerDeclContext decl_context) { 2382 std::vector<DWARFDIE> result; 2383 for (auto it = m_decl_ctx_to_die.find( 2384 (clang::DeclContext *)decl_context.GetOpaqueDeclContext()); 2385 it != m_decl_ctx_to_die.end(); it++) 2386 result.push_back(it->second); 2387 return result; 2388} 2389 2390CompilerDecl DWARFASTParserClang::GetDeclForUIDFromDWARF(const DWARFDIE &die) { 2391 clang::Decl *clang_decl = GetClangDeclForDIE(die); 2392 if (clang_decl != nullptr) 2393 return CompilerDecl(&m_ast, clang_decl); 2394 return CompilerDecl(); 2395} 2396 2397CompilerDeclContext 2398DWARFASTParserClang::GetDeclContextForUIDFromDWARF(const DWARFDIE &die) { 2399 clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE(die); 2400 if (clang_decl_ctx) 2401 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2402 return CompilerDeclContext(); 2403} 2404 2405CompilerDeclContext 2406DWARFASTParserClang::GetDeclContextContainingUIDFromDWARF(const DWARFDIE &die) { 2407 clang::DeclContext *clang_decl_ctx = 2408 GetClangDeclContextContainingDIE(die, nullptr); 2409 if (clang_decl_ctx) 2410 return CompilerDeclContext(&m_ast, clang_decl_ctx); 2411 return CompilerDeclContext(); 2412} 2413 2414size_t DWARFASTParserClang::ParseChildEnumerators( 2415 const SymbolContext &sc, lldb_private::CompilerType &clang_type, 2416 bool is_signed, uint32_t enumerator_byte_size, const DWARFDIE &parent_die) { 2417 if (!parent_die) 2418 return 0; 2419 2420 size_t enumerators_added = 0; 2421 2422 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2423 die = die.GetSibling()) { 2424 const dw_tag_t tag = die.Tag(); 2425 if (tag == DW_TAG_enumerator) { 2426 DWARFAttributes attributes; 2427 const size_t num_child_attributes = die.GetAttributes(attributes); 2428 if (num_child_attributes > 0) { 2429 const char *name = NULL; 2430 bool got_value = false; 2431 int64_t enum_value = 0; 2432 Declaration decl; 2433 2434 uint32_t i; 2435 for (i = 0; i < num_child_attributes; ++i) { 2436 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2437 DWARFFormValue form_value; 2438 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2439 switch (attr) { 2440 case DW_AT_const_value: 2441 got_value = true; 2442 if (is_signed) 2443 enum_value = form_value.Signed(); 2444 else 2445 enum_value = form_value.Unsigned(); 2446 break; 2447 2448 case DW_AT_name: 2449 name = form_value.AsCString(); 2450 break; 2451 2452 case DW_AT_description: 2453 default: 2454 case DW_AT_decl_file: 2455 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 2456 form_value.Unsigned())); 2457 break; 2458 case DW_AT_decl_line: 2459 decl.SetLine(form_value.Unsigned()); 2460 break; 2461 case DW_AT_decl_column: 2462 decl.SetColumn(form_value.Unsigned()); 2463 break; 2464 case DW_AT_sibling: 2465 break; 2466 } 2467 } 2468 } 2469 2470 if (name && name[0] && got_value) { 2471 m_ast.AddEnumerationValueToEnumerationType( 2472 clang_type.GetOpaqueQualType(), 2473 m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType()), 2474 decl, name, enum_value, enumerator_byte_size * 8); 2475 ++enumerators_added; 2476 } 2477 } 2478 } 2479 } 2480 return enumerators_added; 2481} 2482 2483#if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE) 2484 2485class DIEStack { 2486public: 2487 void Push(const DWARFDIE &die) { m_dies.push_back(die); } 2488 2489 void LogDIEs(Log *log) { 2490 StreamString log_strm; 2491 const size_t n = m_dies.size(); 2492 log_strm.Printf("DIEStack[%" PRIu64 "]:\n", (uint64_t)n); 2493 for (size_t i = 0; i < n; i++) { 2494 std::string qualified_name; 2495 const DWARFDIE &die = m_dies[i]; 2496 die.GetQualifiedName(qualified_name); 2497 log_strm.Printf("[%" PRIu64 "] 0x%8.8x: %s name='%s'\n", (uint64_t)i, 2498 die.GetOffset(), die.GetTagAsCString(), 2499 qualified_name.c_str()); 2500 } 2501 log->PutCString(log_strm.GetData()); 2502 } 2503 void Pop() { m_dies.pop_back(); } 2504 2505 class ScopedPopper { 2506 public: 2507 ScopedPopper(DIEStack &die_stack) 2508 : m_die_stack(die_stack), m_valid(false) {} 2509 2510 void Push(const DWARFDIE &die) { 2511 m_valid = true; 2512 m_die_stack.Push(die); 2513 } 2514 2515 ~ScopedPopper() { 2516 if (m_valid) 2517 m_die_stack.Pop(); 2518 } 2519 2520 protected: 2521 DIEStack &m_die_stack; 2522 bool m_valid; 2523 }; 2524 2525protected: 2526 typedef std::vector<DWARFDIE> Stack; 2527 Stack m_dies; 2528}; 2529#endif 2530 2531Function *DWARFASTParserClang::ParseFunctionFromDWARF(const SymbolContext &sc, 2532 const DWARFDIE &die) { 2533 DWARFRangeList func_ranges; 2534 const char *name = NULL; 2535 const char *mangled = NULL; 2536 int decl_file = 0; 2537 int decl_line = 0; 2538 int decl_column = 0; 2539 int call_file = 0; 2540 int call_line = 0; 2541 int call_column = 0; 2542 DWARFExpression frame_base(die.GetCU()); 2543 2544 const dw_tag_t tag = die.Tag(); 2545 2546 if (tag != DW_TAG_subprogram) 2547 return NULL; 2548 2549 if (die.GetDIENamesAndRanges(name, mangled, func_ranges, decl_file, decl_line, 2550 decl_column, call_file, call_line, call_column, 2551 &frame_base)) { 2552 2553 // Union of all ranges in the function DIE (if the function is 2554 // discontiguous) 2555 AddressRange func_range; 2556 lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase(0); 2557 lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd(0); 2558 if (lowest_func_addr != LLDB_INVALID_ADDRESS && 2559 lowest_func_addr <= highest_func_addr) { 2560 ModuleSP module_sp(die.GetModule()); 2561 func_range.GetBaseAddress().ResolveAddressUsingFileSections( 2562 lowest_func_addr, module_sp->GetSectionList()); 2563 if (func_range.GetBaseAddress().IsValid()) 2564 func_range.SetByteSize(highest_func_addr - lowest_func_addr); 2565 } 2566 2567 if (func_range.GetBaseAddress().IsValid()) { 2568 Mangled func_name; 2569 if (mangled) 2570 func_name.SetValue(ConstString(mangled), true); 2571 else if (die.GetParent().Tag() == DW_TAG_compile_unit && 2572 Language::LanguageIsCPlusPlus(die.GetLanguage()) && name && 2573 strcmp(name, "main") != 0) { 2574 // If the mangled name is not present in the DWARF, generate the 2575 // demangled name 2576 // using the decl context. We skip if the function is "main" as its name 2577 // is 2578 // never mangled. 2579 bool is_static = false; 2580 bool is_variadic = false; 2581 bool has_template_params = false; 2582 unsigned type_quals = 0; 2583 std::vector<CompilerType> param_types; 2584 std::vector<clang::ParmVarDecl *> param_decls; 2585 DWARFDeclContext decl_ctx; 2586 StreamString sstr; 2587 2588 die.GetDWARFDeclContext(decl_ctx); 2589 sstr << decl_ctx.GetQualifiedName(); 2590 2591 clang::DeclContext *containing_decl_ctx = 2592 GetClangDeclContextContainingDIE(die, nullptr); 2593 ParseChildParameters(sc, containing_decl_ctx, die, true, is_static, 2594 is_variadic, has_template_params, param_types, 2595 param_decls, type_quals); 2596 sstr << "("; 2597 for (size_t i = 0; i < param_types.size(); i++) { 2598 if (i > 0) 2599 sstr << ", "; 2600 sstr << param_types[i].GetTypeName(); 2601 } 2602 if (is_variadic) 2603 sstr << ", ..."; 2604 sstr << ")"; 2605 if (type_quals & clang::Qualifiers::Const) 2606 sstr << " const"; 2607 2608 func_name.SetValue(ConstString(sstr.GetString()), false); 2609 } else 2610 func_name.SetValue(ConstString(name), false); 2611 2612 FunctionSP func_sp; 2613 std::unique_ptr<Declaration> decl_ap; 2614 if (decl_file != 0 || decl_line != 0 || decl_column != 0) 2615 decl_ap.reset(new Declaration( 2616 sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file), 2617 decl_line, decl_column)); 2618 2619 SymbolFileDWARF *dwarf = die.GetDWARF(); 2620 // Supply the type _only_ if it has already been parsed 2621 Type *func_type = dwarf->GetDIEToType().lookup(die.GetDIE()); 2622 2623 assert(func_type == NULL || func_type != DIE_IS_BEING_PARSED); 2624 2625 if (dwarf->FixupAddress(func_range.GetBaseAddress())) { 2626 const user_id_t func_user_id = die.GetID(); 2627 func_sp.reset(new Function(sc.comp_unit, 2628 func_user_id, // UserID is the DIE offset 2629 func_user_id, func_name, func_type, 2630 func_range)); // first address range 2631 2632 if (func_sp.get() != NULL) { 2633 if (frame_base.IsValid()) 2634 func_sp->GetFrameBaseExpression() = frame_base; 2635 sc.comp_unit->AddFunction(func_sp); 2636 return func_sp.get(); 2637 } 2638 } 2639 } 2640 } 2641 return NULL; 2642} 2643 2644bool DWARFASTParserClang::ParseChildMembers( 2645 const SymbolContext &sc, const DWARFDIE &parent_die, 2646 CompilerType &class_clang_type, const LanguageType class_language, 2647 std::vector<clang::CXXBaseSpecifier *> &base_classes, 2648 std::vector<int> &member_accessibilities, 2649 DWARFDIECollection &member_function_dies, 2650 DelayedPropertyList &delayed_properties, AccessType &default_accessibility, 2651 bool &is_a_class, ClangASTImporter::LayoutInfo &layout_info) { 2652 if (!parent_die) 2653 return 0; 2654 2655 // Get the parent byte size so we can verify any members will fit 2656 const uint64_t parent_byte_size = 2657 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, UINT64_MAX); 2658 const uint64_t parent_bit_size = 2659 parent_byte_size == UINT64_MAX ? UINT64_MAX : parent_byte_size * 8; 2660 2661 uint32_t member_idx = 0; 2662 BitfieldInfo last_field_info; 2663 2664 ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule(); 2665 ClangASTContext *ast = 2666 llvm::dyn_cast_or_null<ClangASTContext>(class_clang_type.GetTypeSystem()); 2667 if (ast == nullptr) 2668 return 0; 2669 2670 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 2671 die = die.GetSibling()) { 2672 dw_tag_t tag = die.Tag(); 2673 2674 switch (tag) { 2675 case DW_TAG_member: 2676 case DW_TAG_APPLE_property: { 2677 DWARFAttributes attributes; 2678 const size_t num_attributes = die.GetAttributes(attributes); 2679 if (num_attributes > 0) { 2680 Declaration decl; 2681 // DWARFExpression location; 2682 const char *name = NULL; 2683 const char *prop_name = NULL; 2684 const char *prop_getter_name = NULL; 2685 const char *prop_setter_name = NULL; 2686 uint32_t prop_attributes = 0; 2687 2688 bool is_artificial = false; 2689 DWARFFormValue encoding_form; 2690 AccessType accessibility = eAccessNone; 2691 uint32_t member_byte_offset = 2692 (parent_die.Tag() == DW_TAG_union_type) ? 0 : UINT32_MAX; 2693 size_t byte_size = 0; 2694 int64_t bit_offset = 0; 2695 uint64_t data_bit_offset = UINT64_MAX; 2696 size_t bit_size = 0; 2697 bool is_external = 2698 false; // On DW_TAG_members, this means the member is static 2699 uint32_t i; 2700 for (i = 0; i < num_attributes && !is_artificial; ++i) { 2701 const dw_attr_t attr = attributes.AttributeAtIndex(i); 2702 DWARFFormValue form_value; 2703 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 2704 switch (attr) { 2705 case DW_AT_decl_file: 2706 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 2707 form_value.Unsigned())); 2708 break; 2709 case DW_AT_decl_line: 2710 decl.SetLine(form_value.Unsigned()); 2711 break; 2712 case DW_AT_decl_column: 2713 decl.SetColumn(form_value.Unsigned()); 2714 break; 2715 case DW_AT_name: 2716 name = form_value.AsCString(); 2717 break; 2718 case DW_AT_type: 2719 encoding_form = form_value; 2720 break; 2721 case DW_AT_bit_offset: 2722 bit_offset = form_value.Signed(); 2723 break; 2724 case DW_AT_bit_size: 2725 bit_size = form_value.Unsigned(); 2726 break; 2727 case DW_AT_byte_size: 2728 byte_size = form_value.Unsigned(); 2729 break; 2730 case DW_AT_data_bit_offset: 2731 data_bit_offset = form_value.Unsigned(); 2732 break; 2733 case DW_AT_data_member_location: 2734 if (form_value.BlockData()) { 2735 Value initialValue(0); 2736 Value memberOffset(0); 2737 const DWARFDataExtractor &debug_info_data = 2738 die.GetDWARF()->get_debug_info_data(); 2739 uint32_t block_length = form_value.Unsigned(); 2740 uint32_t block_offset = 2741 form_value.BlockData() - debug_info_data.GetDataStart(); 2742 if (DWARFExpression::Evaluate( 2743 nullptr, // ExecutionContext * 2744 nullptr, // ClangExpressionVariableList * 2745 nullptr, // ClangExpressionDeclMap * 2746 nullptr, // RegisterContext * 2747 module_sp, debug_info_data, die.GetCU(), block_offset, 2748 block_length, eRegisterKindDWARF, &initialValue, 2749 nullptr, memberOffset, nullptr)) { 2750 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 2751 } 2752 } else { 2753 // With DWARF 3 and later, if the value is an integer constant, 2754 // this form value is the offset in bytes from the beginning 2755 // of the containing entity. 2756 member_byte_offset = form_value.Unsigned(); 2757 } 2758 break; 2759 2760 case DW_AT_accessibility: 2761 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 2762 break; 2763 case DW_AT_artificial: 2764 is_artificial = form_value.Boolean(); 2765 break; 2766 case DW_AT_APPLE_property_name: 2767 prop_name = form_value.AsCString(); 2768 break; 2769 case DW_AT_APPLE_property_getter: 2770 prop_getter_name = form_value.AsCString(); 2771 break; 2772 case DW_AT_APPLE_property_setter: 2773 prop_setter_name = form_value.AsCString(); 2774 break; 2775 case DW_AT_APPLE_property_attribute: 2776 prop_attributes = form_value.Unsigned(); 2777 break; 2778 case DW_AT_external: 2779 is_external = form_value.Boolean(); 2780 break; 2781 2782 default: 2783 case DW_AT_declaration: 2784 case DW_AT_description: 2785 case DW_AT_mutable: 2786 case DW_AT_visibility: 2787 case DW_AT_sibling: 2788 break; 2789 } 2790 } 2791 } 2792 2793 if (prop_name) { 2794 ConstString fixed_getter; 2795 ConstString fixed_setter; 2796 2797 // Check if the property getter/setter were provided as full 2798 // names. We want basenames, so we extract them. 2799 2800 if (prop_getter_name && prop_getter_name[0] == '-') { 2801 ObjCLanguage::MethodName prop_getter_method(prop_getter_name, true); 2802 prop_getter_name = prop_getter_method.GetSelector().GetCString(); 2803 } 2804 2805 if (prop_setter_name && prop_setter_name[0] == '-') { 2806 ObjCLanguage::MethodName prop_setter_method(prop_setter_name, true); 2807 prop_setter_name = prop_setter_method.GetSelector().GetCString(); 2808 } 2809 2810 // If the names haven't been provided, they need to be 2811 // filled in. 2812 2813 if (!prop_getter_name) { 2814 prop_getter_name = prop_name; 2815 } 2816 if (!prop_setter_name && prop_name[0] && 2817 !(prop_attributes & DW_APPLE_PROPERTY_readonly)) { 2818 StreamString ss; 2819 2820 ss.Printf("set%c%s:", toupper(prop_name[0]), &prop_name[1]); 2821 2822 fixed_setter.SetString(ss.GetString()); 2823 prop_setter_name = fixed_setter.GetCString(); 2824 } 2825 } 2826 2827 // Clang has a DWARF generation bug where sometimes it 2828 // represents fields that are references with bad byte size 2829 // and bit size/offset information such as: 2830 // 2831 // DW_AT_byte_size( 0x00 ) 2832 // DW_AT_bit_size( 0x40 ) 2833 // DW_AT_bit_offset( 0xffffffffffffffc0 ) 2834 // 2835 // So check the bit offset to make sure it is sane, and if 2836 // the values are not sane, remove them. If we don't do this 2837 // then we will end up with a crash if we try to use this 2838 // type in an expression when clang becomes unhappy with its 2839 // recycled debug info. 2840 2841 if (byte_size == 0 && bit_offset < 0) { 2842 bit_size = 0; 2843 bit_offset = 0; 2844 } 2845 2846 // FIXME: Make Clang ignore Objective-C accessibility for expressions 2847 if (class_language == eLanguageTypeObjC || 2848 class_language == eLanguageTypeObjC_plus_plus) 2849 accessibility = eAccessNone; 2850 2851 if (member_idx == 0 && !is_artificial && name && 2852 (strstr(name, "_vptr$") == name)) { 2853 // Not all compilers will mark the vtable pointer 2854 // member as artificial (llvm-gcc). We can't have 2855 // the virtual members in our classes otherwise it 2856 // throws off all child offsets since we end up 2857 // having and extra pointer sized member in our 2858 // class layouts. 2859 is_artificial = true; 2860 } 2861 2862 // Handle static members 2863 if (is_external && member_byte_offset == UINT32_MAX) { 2864 Type *var_type = die.ResolveTypeUID(DIERef(encoding_form)); 2865 2866 if (var_type) { 2867 if (accessibility == eAccessNone) 2868 accessibility = eAccessPublic; 2869 ClangASTContext::AddVariableToRecordType( 2870 class_clang_type, name, var_type->GetLayoutCompilerType(), 2871 accessibility); 2872 } 2873 break; 2874 } 2875 2876 if (is_artificial == false) { 2877 Type *member_type = die.ResolveTypeUID(DIERef(encoding_form)); 2878 2879 clang::FieldDecl *field_decl = NULL; 2880 if (tag == DW_TAG_member) { 2881 if (member_type) { 2882 if (accessibility == eAccessNone) 2883 accessibility = default_accessibility; 2884 member_accessibilities.push_back(accessibility); 2885 2886 uint64_t field_bit_offset = 2887 (member_byte_offset == UINT32_MAX ? 0 2888 : (member_byte_offset * 8)); 2889 if (bit_size > 0) { 2890 2891 BitfieldInfo this_field_info; 2892 this_field_info.bit_offset = field_bit_offset; 2893 this_field_info.bit_size = bit_size; 2894 2895 ///////////////////////////////////////////////////////////// 2896 // How to locate a field given the DWARF debug information 2897 // 2898 // AT_byte_size indicates the size of the word in which the 2899 // bit offset must be interpreted. 2900 // 2901 // AT_data_member_location indicates the byte offset of the 2902 // word from the base address of the structure. 2903 // 2904 // AT_bit_offset indicates how many bits into the word 2905 // (according to the host endianness) the low-order bit of 2906 // the field starts. AT_bit_offset can be negative. 2907 // 2908 // AT_bit_size indicates the size of the field in bits. 2909 ///////////////////////////////////////////////////////////// 2910 2911 if (data_bit_offset != UINT64_MAX) { 2912 this_field_info.bit_offset = data_bit_offset; 2913 } else { 2914 if (byte_size == 0) 2915 byte_size = member_type->GetByteSize(); 2916 2917 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 2918 if (objfile->GetByteOrder() == eByteOrderLittle) { 2919 this_field_info.bit_offset += byte_size * 8; 2920 this_field_info.bit_offset -= (bit_offset + bit_size); 2921 } else { 2922 this_field_info.bit_offset += bit_offset; 2923 } 2924 } 2925 2926 if ((this_field_info.bit_offset >= parent_bit_size) || 2927 !last_field_info.NextBitfieldOffsetIsValid( 2928 this_field_info.bit_offset)) { 2929 ObjectFile *objfile = die.GetDWARF()->GetObjectFile(); 2930 objfile->GetModule()->ReportWarning( 2931 "0x%8.8" PRIx64 ": %s bitfield named \"%s\" has invalid " 2932 "bit offset (0x%8.8" PRIx64 2933 ") member will be ignored. Please file a bug against the " 2934 "compiler and include the preprocessed output for %s\n", 2935 die.GetID(), DW_TAG_value_to_name(tag), name, 2936 this_field_info.bit_offset, 2937 sc.comp_unit ? sc.comp_unit->GetPath().c_str() 2938 : "the source file"); 2939 this_field_info.Clear(); 2940 continue; 2941 } 2942 2943 // Update the field bit offset we will report for layout 2944 field_bit_offset = this_field_info.bit_offset; 2945 2946 // If the member to be emitted did not start on a character 2947 // boundary and there is 2948 // empty space between the last field and this one, then we need 2949 // to emit an 2950 // anonymous member filling up the space up to its start. There 2951 // are three cases 2952 // here: 2953 // 2954 // 1 If the previous member ended on a character boundary, then 2955 // we can emit an 2956 // anonymous member starting at the most recent character 2957 // boundary. 2958 // 2959 // 2 If the previous member did not end on a character boundary 2960 // and the distance 2961 // from the end of the previous member to the current member 2962 // is less than a 2963 // word width, then we can emit an anonymous member starting 2964 // right after the 2965 // previous member and right before this member. 2966 // 2967 // 3 If the previous member did not end on a character boundary 2968 // and the distance 2969 // from the end of the previous member to the current member 2970 // is greater than 2971 // or equal a word width, then we act as in Case 1. 2972 2973 const uint64_t character_width = 8; 2974 const uint64_t word_width = 32; 2975 2976 // Objective-C has invalid DW_AT_bit_offset values in older 2977 // versions 2978 // of clang, so we have to be careful and only insert unnamed 2979 // bitfields 2980 // if we have a new enough clang. 2981 bool detect_unnamed_bitfields = true; 2982 2983 if (class_language == eLanguageTypeObjC || 2984 class_language == eLanguageTypeObjC_plus_plus) 2985 detect_unnamed_bitfields = 2986 die.GetCU()->Supports_unnamed_objc_bitfields(); 2987 2988 if (detect_unnamed_bitfields) { 2989 BitfieldInfo anon_field_info; 2990 2991 if ((this_field_info.bit_offset % character_width) != 2992 0) // not char aligned 2993 { 2994 uint64_t last_field_end = 0; 2995 2996 if (last_field_info.IsValid()) 2997 last_field_end = 2998 last_field_info.bit_offset + last_field_info.bit_size; 2999 3000 if (this_field_info.bit_offset != last_field_end) { 3001 if (((last_field_end % character_width) == 0) || // case 1 3002 (this_field_info.bit_offset - last_field_end >= 3003 word_width)) // case 3 3004 { 3005 anon_field_info.bit_size = 3006 this_field_info.bit_offset % character_width; 3007 anon_field_info.bit_offset = 3008 this_field_info.bit_offset - 3009 anon_field_info.bit_size; 3010 } else // case 2 3011 { 3012 anon_field_info.bit_size = 3013 this_field_info.bit_offset - last_field_end; 3014 anon_field_info.bit_offset = last_field_end; 3015 } 3016 } 3017 } 3018 3019 if (anon_field_info.IsValid()) { 3020 clang::FieldDecl *unnamed_bitfield_decl = 3021 ClangASTContext::AddFieldToRecordType( 3022 class_clang_type, NULL, 3023 m_ast.GetBuiltinTypeForEncodingAndBitSize( 3024 eEncodingSint, word_width), 3025 accessibility, anon_field_info.bit_size); 3026 3027 layout_info.field_offsets.insert(std::make_pair( 3028 unnamed_bitfield_decl, anon_field_info.bit_offset)); 3029 } 3030 } 3031 last_field_info = this_field_info; 3032 } else { 3033 last_field_info.Clear(); 3034 } 3035 3036 CompilerType member_clang_type = 3037 member_type->GetLayoutCompilerType(); 3038 if (!member_clang_type.IsCompleteType()) 3039 member_clang_type.GetCompleteType(); 3040 3041 { 3042 // Older versions of clang emit array[0] and array[1] in the 3043 // same way (<rdar://problem/12566646>). 3044 // If the current field is at the end of the structure, then 3045 // there is definitely no room for extra 3046 // elements and we override the type to array[0]. 3047 3048 CompilerType member_array_element_type; 3049 uint64_t member_array_size; 3050 bool member_array_is_incomplete; 3051 3052 if (member_clang_type.IsArrayType( 3053 &member_array_element_type, &member_array_size, 3054 &member_array_is_incomplete) && 3055 !member_array_is_incomplete) { 3056 uint64_t parent_byte_size = 3057 parent_die.GetAttributeValueAsUnsigned(DW_AT_byte_size, 3058 UINT64_MAX); 3059 3060 if (member_byte_offset >= parent_byte_size) { 3061 if (member_array_size != 1 && 3062 (member_array_size != 0 || 3063 member_byte_offset > parent_byte_size)) { 3064 module_sp->ReportError( 3065 "0x%8.8" PRIx64 3066 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 3067 " which extends beyond the bounds of 0x%8.8" PRIx64, 3068 die.GetID(), name, encoding_form.Reference(), 3069 parent_die.GetID()); 3070 } 3071 3072 member_clang_type = m_ast.CreateArrayType( 3073 member_array_element_type, 0, false); 3074 } 3075 } 3076 } 3077 3078 if (ClangASTContext::IsCXXClassType(member_clang_type) && 3079 member_clang_type.GetCompleteType() == false) { 3080 if (die.GetCU()->GetProducer() == 3081 DWARFCompileUnit::eProducerClang) 3082 module_sp->ReportError( 3083 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3084 "0x%8.8x (%s) whose type is a forward declaration, not a " 3085 "complete definition.\nTry compiling the source file " 3086 "with -fno-limit-debug-info", 3087 parent_die.GetOffset(), parent_die.GetName(), 3088 die.GetOffset(), name); 3089 else 3090 module_sp->ReportError( 3091 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3092 "0x%8.8x (%s) whose type is a forward declaration, not a " 3093 "complete definition.\nPlease file a bug against the " 3094 "compiler and include the preprocessed output for %s", 3095 parent_die.GetOffset(), parent_die.GetName(), 3096 die.GetOffset(), name, 3097 sc.comp_unit ? sc.comp_unit->GetPath().c_str() 3098 : "the source file"); 3099 // We have no choice other than to pretend that the member class 3100 // is complete. If we don't do this, clang will crash when 3101 // trying 3102 // to layout the class. Since we provide layout assistance, all 3103 // ivars in this class and other classes will be fine, this is 3104 // the best we can do short of crashing. 3105 if (ClangASTContext::StartTagDeclarationDefinition( 3106 member_clang_type)) { 3107 ClangASTContext::CompleteTagDeclarationDefinition( 3108 member_clang_type); 3109 } else { 3110 module_sp->ReportError( 3111 "DWARF DIE at 0x%8.8x (class %s) has a member variable " 3112 "0x%8.8x (%s) whose type claims to be a C++ class but we " 3113 "were not able to start its definition.\nPlease file a " 3114 "bug and attach the file at the start of this error " 3115 "message", 3116 parent_die.GetOffset(), parent_die.GetName(), 3117 die.GetOffset(), name); 3118 } 3119 } 3120 3121 field_decl = ClangASTContext::AddFieldToRecordType( 3122 class_clang_type, name, member_clang_type, accessibility, 3123 bit_size); 3124 3125 m_ast.SetMetadataAsUserID(field_decl, die.GetID()); 3126 3127 layout_info.field_offsets.insert( 3128 std::make_pair(field_decl, field_bit_offset)); 3129 } else { 3130 if (name) 3131 module_sp->ReportError( 3132 "0x%8.8" PRIx64 3133 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 3134 " which was unable to be parsed", 3135 die.GetID(), name, encoding_form.Reference()); 3136 else 3137 module_sp->ReportError( 3138 "0x%8.8" PRIx64 3139 ": DW_TAG_member refers to type 0x%8.8" PRIx64 3140 " which was unable to be parsed", 3141 die.GetID(), encoding_form.Reference()); 3142 } 3143 } 3144 3145 if (prop_name != NULL && member_type) { 3146 clang::ObjCIvarDecl *ivar_decl = NULL; 3147 3148 if (field_decl) { 3149 ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl); 3150 assert(ivar_decl != NULL); 3151 } 3152 3153 ClangASTMetadata metadata; 3154 metadata.SetUserID(die.GetID()); 3155 delayed_properties.push_back(DelayedAddObjCClassProperty( 3156 class_clang_type, prop_name, 3157 member_type->GetLayoutCompilerType(), ivar_decl, 3158 prop_setter_name, prop_getter_name, prop_attributes, 3159 &metadata)); 3160 3161 if (ivar_decl) 3162 m_ast.SetMetadataAsUserID(ivar_decl, die.GetID()); 3163 } 3164 } 3165 } 3166 ++member_idx; 3167 } break; 3168 3169 case DW_TAG_subprogram: 3170 // Let the type parsing code handle this one for us. 3171 member_function_dies.Append(die); 3172 break; 3173 3174 case DW_TAG_inheritance: { 3175 is_a_class = true; 3176 if (default_accessibility == eAccessNone) 3177 default_accessibility = eAccessPrivate; 3178 // TODO: implement DW_TAG_inheritance type parsing 3179 DWARFAttributes attributes; 3180 const size_t num_attributes = die.GetAttributes(attributes); 3181 if (num_attributes > 0) { 3182 Declaration decl; 3183 DWARFExpression location(die.GetCU()); 3184 DWARFFormValue encoding_form; 3185 AccessType accessibility = default_accessibility; 3186 bool is_virtual = false; 3187 bool is_base_of_class = true; 3188 off_t member_byte_offset = 0; 3189 uint32_t i; 3190 for (i = 0; i < num_attributes; ++i) { 3191 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3192 DWARFFormValue form_value; 3193 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3194 switch (attr) { 3195 case DW_AT_decl_file: 3196 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 3197 form_value.Unsigned())); 3198 break; 3199 case DW_AT_decl_line: 3200 decl.SetLine(form_value.Unsigned()); 3201 break; 3202 case DW_AT_decl_column: 3203 decl.SetColumn(form_value.Unsigned()); 3204 break; 3205 case DW_AT_type: 3206 encoding_form = form_value; 3207 break; 3208 case DW_AT_data_member_location: 3209 if (form_value.BlockData()) { 3210 Value initialValue(0); 3211 Value memberOffset(0); 3212 const DWARFDataExtractor &debug_info_data = 3213 die.GetDWARF()->get_debug_info_data(); 3214 uint32_t block_length = form_value.Unsigned(); 3215 uint32_t block_offset = 3216 form_value.BlockData() - debug_info_data.GetDataStart(); 3217 if (DWARFExpression::Evaluate( 3218 nullptr, nullptr, nullptr, nullptr, module_sp, 3219 debug_info_data, die.GetCU(), block_offset, 3220 block_length, eRegisterKindDWARF, &initialValue, 3221 nullptr, memberOffset, nullptr)) { 3222 member_byte_offset = memberOffset.ResolveValue(NULL).UInt(); 3223 } 3224 } else { 3225 // With DWARF 3 and later, if the value is an integer constant, 3226 // this form value is the offset in bytes from the beginning 3227 // of the containing entity. 3228 member_byte_offset = form_value.Unsigned(); 3229 } 3230 break; 3231 3232 case DW_AT_accessibility: 3233 accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); 3234 break; 3235 3236 case DW_AT_virtuality: 3237 is_virtual = form_value.Boolean(); 3238 break; 3239 3240 case DW_AT_sibling: 3241 break; 3242 3243 default: 3244 break; 3245 } 3246 } 3247 } 3248 3249 Type *base_class_type = die.ResolveTypeUID(DIERef(encoding_form)); 3250 if (base_class_type == NULL) { 3251 module_sp->ReportError("0x%8.8x: DW_TAG_inheritance failed to " 3252 "resolve the base class at 0x%8.8" PRIx64 3253 " from enclosing type 0x%8.8x. \nPlease file " 3254 "a bug and attach the file at the start of " 3255 "this error message", 3256 die.GetOffset(), encoding_form.Reference(), 3257 parent_die.GetOffset()); 3258 break; 3259 } 3260 3261 CompilerType base_class_clang_type = 3262 base_class_type->GetFullCompilerType(); 3263 assert(base_class_clang_type); 3264 if (class_language == eLanguageTypeObjC) { 3265 ast->SetObjCSuperClass(class_clang_type, base_class_clang_type); 3266 } else { 3267 base_classes.push_back(ast->CreateBaseClassSpecifier( 3268 base_class_clang_type.GetOpaqueQualType(), accessibility, 3269 is_virtual, is_base_of_class)); 3270 3271 if (is_virtual) { 3272 // Do not specify any offset for virtual inheritance. The DWARF 3273 // produced by clang doesn't 3274 // give us a constant offset, but gives us a DWARF expressions that 3275 // requires an actual object 3276 // in memory. the DW_AT_data_member_location for a virtual base 3277 // class looks like: 3278 // DW_AT_data_member_location( DW_OP_dup, DW_OP_deref, 3279 // DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref, 3280 // DW_OP_plus ) 3281 // Given this, there is really no valid response we can give to 3282 // clang for virtual base 3283 // class offsets, and this should eventually be removed from 3284 // LayoutRecordType() in the external 3285 // AST source in clang. 3286 } else { 3287 layout_info.base_offsets.insert(std::make_pair( 3288 ast->GetAsCXXRecordDecl( 3289 base_class_clang_type.GetOpaqueQualType()), 3290 clang::CharUnits::fromQuantity(member_byte_offset))); 3291 } 3292 } 3293 } 3294 } break; 3295 3296 default: 3297 break; 3298 } 3299 } 3300 3301 return true; 3302} 3303 3304size_t DWARFASTParserClang::ParseChildParameters( 3305 const SymbolContext &sc, clang::DeclContext *containing_decl_ctx, 3306 const DWARFDIE &parent_die, bool skip_artificial, bool &is_static, 3307 bool &is_variadic, bool &has_template_params, 3308 std::vector<CompilerType> &function_param_types, 3309 std::vector<clang::ParmVarDecl *> &function_param_decls, 3310 unsigned &type_quals) { 3311 if (!parent_die) 3312 return 0; 3313 3314 size_t arg_idx = 0; 3315 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 3316 die = die.GetSibling()) { 3317 const dw_tag_t tag = die.Tag(); 3318 switch (tag) { 3319 case DW_TAG_formal_parameter: { 3320 DWARFAttributes attributes; 3321 const size_t num_attributes = die.GetAttributes(attributes); 3322 if (num_attributes > 0) { 3323 const char *name = NULL; 3324 Declaration decl; 3325 DWARFFormValue param_type_die_form; 3326 bool is_artificial = false; 3327 // one of None, Auto, Register, Extern, Static, PrivateExtern 3328 3329 clang::StorageClass storage = clang::SC_None; 3330 uint32_t i; 3331 for (i = 0; i < num_attributes; ++i) { 3332 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3333 DWARFFormValue form_value; 3334 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3335 switch (attr) { 3336 case DW_AT_decl_file: 3337 decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex( 3338 form_value.Unsigned())); 3339 break; 3340 case DW_AT_decl_line: 3341 decl.SetLine(form_value.Unsigned()); 3342 break; 3343 case DW_AT_decl_column: 3344 decl.SetColumn(form_value.Unsigned()); 3345 break; 3346 case DW_AT_name: 3347 name = form_value.AsCString(); 3348 break; 3349 case DW_AT_type: 3350 param_type_die_form = form_value; 3351 break; 3352 case DW_AT_artificial: 3353 is_artificial = form_value.Boolean(); 3354 break; 3355 case DW_AT_location: 3356 // if (form_value.BlockData()) 3357 // { 3358 // const DWARFDataExtractor& 3359 // debug_info_data = debug_info(); 3360 // uint32_t block_length = 3361 // form_value.Unsigned(); 3362 // DWARFDataExtractor 3363 // location(debug_info_data, 3364 // form_value.BlockData() - 3365 // debug_info_data.GetDataStart(), 3366 // block_length); 3367 // } 3368 // else 3369 // { 3370 // } 3371 // break; 3372 case DW_AT_const_value: 3373 case DW_AT_default_value: 3374 case DW_AT_description: 3375 case DW_AT_endianity: 3376 case DW_AT_is_optional: 3377 case DW_AT_segment: 3378 case DW_AT_variable_parameter: 3379 default: 3380 case DW_AT_abstract_origin: 3381 case DW_AT_sibling: 3382 break; 3383 } 3384 } 3385 } 3386 3387 bool skip = false; 3388 if (skip_artificial) { 3389 if (is_artificial) { 3390 // In order to determine if a C++ member function is 3391 // "const" we have to look at the const-ness of "this"... 3392 // Ugly, but that 3393 if (arg_idx == 0) { 3394 if (DeclKindIsCXXClass(containing_decl_ctx->getDeclKind())) { 3395 // Often times compilers omit the "this" name for the 3396 // specification DIEs, so we can't rely upon the name 3397 // being in the formal parameter DIE... 3398 if (name == NULL || ::strcmp(name, "this") == 0) { 3399 Type *this_type = 3400 die.ResolveTypeUID(DIERef(param_type_die_form)); 3401 if (this_type) { 3402 uint32_t encoding_mask = this_type->GetEncodingMask(); 3403 if (encoding_mask & Type::eEncodingIsPointerUID) { 3404 is_static = false; 3405 3406 if (encoding_mask & (1u << Type::eEncodingIsConstUID)) 3407 type_quals |= clang::Qualifiers::Const; 3408 if (encoding_mask & (1u << Type::eEncodingIsVolatileUID)) 3409 type_quals |= clang::Qualifiers::Volatile; 3410 } 3411 } 3412 } 3413 } 3414 } 3415 skip = true; 3416 } else { 3417 3418 // HACK: Objective C formal parameters "self" and "_cmd" 3419 // are not marked as artificial in the DWARF... 3420 CompileUnit *comp_unit = die.GetLLDBCompileUnit(); 3421 if (comp_unit) { 3422 switch (comp_unit->GetLanguage()) { 3423 case eLanguageTypeObjC: 3424 case eLanguageTypeObjC_plus_plus: 3425 if (name && name[0] && 3426 (strcmp(name, "self") == 0 || strcmp(name, "_cmd") == 0)) 3427 skip = true; 3428 break; 3429 default: 3430 break; 3431 } 3432 } 3433 } 3434 } 3435 3436 if (!skip) { 3437 Type *type = die.ResolveTypeUID(DIERef(param_type_die_form)); 3438 if (type) { 3439 function_param_types.push_back(type->GetForwardCompilerType()); 3440 3441 clang::ParmVarDecl *param_var_decl = 3442 m_ast.CreateParameterDeclaration( 3443 name, type->GetForwardCompilerType(), storage); 3444 assert(param_var_decl); 3445 function_param_decls.push_back(param_var_decl); 3446 3447 m_ast.SetMetadataAsUserID(param_var_decl, die.GetID()); 3448 } 3449 } 3450 } 3451 arg_idx++; 3452 } break; 3453 3454 case DW_TAG_unspecified_parameters: 3455 is_variadic = true; 3456 break; 3457 3458 case DW_TAG_template_type_parameter: 3459 case DW_TAG_template_value_parameter: 3460 case DW_TAG_GNU_template_parameter_pack: 3461 // The one caller of this was never using the template_param_infos, 3462 // and the local variable was taking up a large amount of stack space 3463 // in SymbolFileDWARF::ParseType() so this was removed. If we ever need 3464 // the template params back, we can add them back. 3465 // ParseTemplateDIE (dwarf_cu, die, template_param_infos); 3466 has_template_params = true; 3467 break; 3468 3469 default: 3470 break; 3471 } 3472 } 3473 return arg_idx; 3474} 3475 3476void DWARFASTParserClang::ParseChildArrayInfo( 3477 const SymbolContext &sc, const DWARFDIE &parent_die, int64_t &first_index, 3478 std::vector<uint64_t> &element_orders, uint32_t &byte_stride, 3479 uint32_t &bit_stride) { 3480 if (!parent_die) 3481 return; 3482 3483 for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); 3484 die = die.GetSibling()) { 3485 const dw_tag_t tag = die.Tag(); 3486 switch (tag) { 3487 case DW_TAG_subrange_type: { 3488 DWARFAttributes attributes; 3489 const size_t num_child_attributes = die.GetAttributes(attributes); 3490 if (num_child_attributes > 0) { 3491 uint64_t num_elements = 0; 3492 uint64_t lower_bound = 0; 3493 uint64_t upper_bound = 0; 3494 bool upper_bound_valid = false; 3495 uint32_t i; 3496 for (i = 0; i < num_child_attributes; ++i) { 3497 const dw_attr_t attr = attributes.AttributeAtIndex(i); 3498 DWARFFormValue form_value; 3499 if (attributes.ExtractFormValueAtIndex(i, form_value)) { 3500 switch (attr) { 3501 case DW_AT_name: 3502 break; 3503 3504 case DW_AT_count: 3505 num_elements = form_value.Unsigned(); 3506 break; 3507 3508 case DW_AT_bit_stride: 3509 bit_stride = form_value.Unsigned(); 3510 break; 3511 3512 case DW_AT_byte_stride: 3513 byte_stride = form_value.Unsigned(); 3514 break; 3515 3516 case DW_AT_lower_bound: 3517 lower_bound = form_value.Unsigned(); 3518 break; 3519 3520 case DW_AT_upper_bound: 3521 upper_bound_valid = true; 3522 upper_bound = form_value.Unsigned(); 3523 break; 3524 3525 default: 3526 case DW_AT_abstract_origin: 3527 case DW_AT_accessibility: 3528 case DW_AT_allocated: 3529 case DW_AT_associated: 3530 case DW_AT_data_location: 3531 case DW_AT_declaration: 3532 case DW_AT_description: 3533 case DW_AT_sibling: 3534 case DW_AT_threads_scaled: 3535 case DW_AT_type: 3536 case DW_AT_visibility: 3537 break; 3538 } 3539 } 3540 } 3541 3542 if (num_elements == 0) { 3543 if (upper_bound_valid && upper_bound >= lower_bound) 3544 num_elements = upper_bound - lower_bound + 1; 3545 } 3546 3547 element_orders.push_back(num_elements); 3548 } 3549 } break; 3550 } 3551 } 3552} 3553 3554Type *DWARFASTParserClang::GetTypeForDIE(const DWARFDIE &die) { 3555 if (die) { 3556 SymbolFileDWARF *dwarf = die.GetDWARF(); 3557 DWARFAttributes attributes; 3558 const size_t num_attributes = die.GetAttributes(attributes); 3559 if (num_attributes > 0) { 3560 DWARFFormValue type_die_form; 3561 for (size_t i = 0; i < num_attributes; ++i) { 3562 dw_attr_t attr = attributes.AttributeAtIndex(i); 3563 DWARFFormValue form_value; 3564 3565 if (attr == DW_AT_type && 3566 attributes.ExtractFormValueAtIndex(i, form_value)) 3567 return dwarf->ResolveTypeUID(dwarf->GetDIE(DIERef(form_value)), true); 3568 } 3569 } 3570 } 3571 3572 return nullptr; 3573} 3574 3575clang::Decl *DWARFASTParserClang::GetClangDeclForDIE(const DWARFDIE &die) { 3576 if (!die) 3577 return nullptr; 3578 3579 switch (die.Tag()) { 3580 case DW_TAG_variable: 3581 case DW_TAG_constant: 3582 case DW_TAG_formal_parameter: 3583 case DW_TAG_imported_declaration: 3584 case DW_TAG_imported_module: 3585 break; 3586 default: 3587 return nullptr; 3588 } 3589 3590 DIEToDeclMap::iterator cache_pos = m_die_to_decl.find(die.GetDIE()); 3591 if (cache_pos != m_die_to_decl.end()) 3592 return cache_pos->second; 3593 3594 if (DWARFDIE spec_die = die.GetReferencedDIE(DW_AT_specification)) { 3595 clang::Decl *decl = GetClangDeclForDIE(spec_die); 3596 m_die_to_decl[die.GetDIE()] = decl; 3597 m_decl_to_die[decl].insert(die.GetDIE()); 3598 return decl; 3599 } 3600 3601 if (DWARFDIE abstract_origin_die = 3602 die.GetReferencedDIE(DW_AT_abstract_origin)) { 3603 clang::Decl *decl = GetClangDeclForDIE(abstract_origin_die); 3604 m_die_to_decl[die.GetDIE()] = decl; 3605 m_decl_to_die[decl].insert(die.GetDIE()); 3606 return decl; 3607 } 3608 3609 clang::Decl *decl = nullptr; 3610 switch (die.Tag()) { 3611 case DW_TAG_variable: 3612 case DW_TAG_constant: 3613 case DW_TAG_formal_parameter: { 3614 SymbolFileDWARF *dwarf = die.GetDWARF(); 3615 Type *type = GetTypeForDIE(die); 3616 if (dwarf && type) { 3617 const char *name = die.GetName(); 3618 clang::DeclContext *decl_context = 3619 ClangASTContext::DeclContextGetAsDeclContext( 3620 dwarf->GetDeclContextContainingUID(die.GetID())); 3621 decl = m_ast.CreateVariableDeclaration( 3622 decl_context, name, 3623 ClangUtil::GetQualType(type->GetForwardCompilerType())); 3624 } 3625 break; 3626 } 3627 case DW_TAG_imported_declaration: { 3628 SymbolFileDWARF *dwarf = die.GetDWARF(); 3629 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3630 if (imported_uid) { 3631 CompilerDecl imported_decl = imported_uid.GetDecl(); 3632 if (imported_decl) { 3633 clang::DeclContext *decl_context = 3634 ClangASTContext::DeclContextGetAsDeclContext( 3635 dwarf->GetDeclContextContainingUID(die.GetID())); 3636 if (clang::NamedDecl *clang_imported_decl = 3637 llvm::dyn_cast<clang::NamedDecl>( 3638 (clang::Decl *)imported_decl.GetOpaqueDecl())) 3639 decl = 3640 m_ast.CreateUsingDeclaration(decl_context, clang_imported_decl); 3641 } 3642 } 3643 break; 3644 } 3645 case DW_TAG_imported_module: { 3646 SymbolFileDWARF *dwarf = die.GetDWARF(); 3647 DWARFDIE imported_uid = die.GetAttributeValueAsReferenceDIE(DW_AT_import); 3648 3649 if (imported_uid) { 3650 CompilerDeclContext imported_decl_ctx = imported_uid.GetDeclContext(); 3651 if (imported_decl_ctx) { 3652 clang::DeclContext *decl_context = 3653 ClangASTContext::DeclContextGetAsDeclContext( 3654 dwarf->GetDeclContextContainingUID(die.GetID())); 3655 if (clang::NamespaceDecl *ns_decl = 3656 ClangASTContext::DeclContextGetAsNamespaceDecl( 3657 imported_decl_ctx)) 3658 decl = m_ast.CreateUsingDirectiveDeclaration(decl_context, ns_decl); 3659 } 3660 } 3661 break; 3662 } 3663 default: 3664 break; 3665 } 3666 3667 m_die_to_decl[die.GetDIE()] = decl; 3668 m_decl_to_die[decl].insert(die.GetDIE()); 3669 3670 return decl; 3671} 3672 3673clang::DeclContext * 3674DWARFASTParserClang::GetClangDeclContextForDIE(const DWARFDIE &die) { 3675 if (die) { 3676 clang::DeclContext *decl_ctx = GetCachedClangDeclContextForDIE(die); 3677 if (decl_ctx) 3678 return decl_ctx; 3679 3680 bool try_parsing_type = true; 3681 switch (die.Tag()) { 3682 case DW_TAG_compile_unit: 3683 decl_ctx = m_ast.GetTranslationUnitDecl(); 3684 try_parsing_type = false; 3685 break; 3686 3687 case DW_TAG_namespace: 3688 decl_ctx = ResolveNamespaceDIE(die); 3689 try_parsing_type = false; 3690 break; 3691 3692 case DW_TAG_lexical_block: 3693 decl_ctx = GetDeclContextForBlock(die); 3694 try_parsing_type = false; 3695 break; 3696 3697 default: 3698 break; 3699 } 3700 3701 if (decl_ctx == nullptr && try_parsing_type) { 3702 Type *type = die.GetDWARF()->ResolveType(die); 3703 if (type) 3704 decl_ctx = GetCachedClangDeclContextForDIE(die); 3705 } 3706 3707 if (decl_ctx) { 3708 LinkDeclContextToDIE(decl_ctx, die); 3709 return decl_ctx; 3710 } 3711 } 3712 return nullptr; 3713} 3714 3715static bool IsSubroutine(const DWARFDIE &die) { 3716 switch (die.Tag()) { 3717 case DW_TAG_subprogram: 3718 case DW_TAG_inlined_subroutine: 3719 return true; 3720 default: 3721 return false; 3722 } 3723} 3724 3725static DWARFDIE GetContainingFunctionWithAbstractOrigin(const DWARFDIE &die) { 3726 for (DWARFDIE candidate = die; candidate; candidate = candidate.GetParent()) { 3727 if (IsSubroutine(candidate)) { 3728 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3729 return candidate; 3730 } else { 3731 return DWARFDIE(); 3732 } 3733 } 3734 } 3735 assert(0 && "Shouldn't call GetContainingFunctionWithAbstractOrigin on " 3736 "something not in a function"); 3737 return DWARFDIE(); 3738} 3739 3740static DWARFDIE FindAnyChildWithAbstractOrigin(const DWARFDIE &context) { 3741 for (DWARFDIE candidate = context.GetFirstChild(); candidate.IsValid(); 3742 candidate = candidate.GetSibling()) { 3743 if (candidate.GetReferencedDIE(DW_AT_abstract_origin)) { 3744 return candidate; 3745 } 3746 } 3747 return DWARFDIE(); 3748} 3749 3750static DWARFDIE FindFirstChildWithAbstractOrigin(const DWARFDIE &block, 3751 const DWARFDIE &function) { 3752 assert(IsSubroutine(function)); 3753 for (DWARFDIE context = block; context != function.GetParent(); 3754 context = context.GetParent()) { 3755 assert(!IsSubroutine(context) || context == function); 3756 if (DWARFDIE child = FindAnyChildWithAbstractOrigin(context)) { 3757 return child; 3758 } 3759 } 3760 return DWARFDIE(); 3761} 3762 3763clang::DeclContext * 3764DWARFASTParserClang::GetDeclContextForBlock(const DWARFDIE &die) { 3765 assert(die.Tag() == DW_TAG_lexical_block); 3766 DWARFDIE containing_function_with_abstract_origin = 3767 GetContainingFunctionWithAbstractOrigin(die); 3768 if (!containing_function_with_abstract_origin) { 3769 return (clang::DeclContext *)ResolveBlockDIE(die); 3770 } 3771 DWARFDIE child = FindFirstChildWithAbstractOrigin( 3772 die, containing_function_with_abstract_origin); 3773 CompilerDeclContext decl_context = 3774 GetDeclContextContainingUIDFromDWARF(child); 3775 return (clang::DeclContext *)decl_context.GetOpaqueDeclContext(); 3776} 3777 3778clang::BlockDecl *DWARFASTParserClang::ResolveBlockDIE(const DWARFDIE &die) { 3779 if (die && die.Tag() == DW_TAG_lexical_block) { 3780 clang::BlockDecl *decl = 3781 llvm::cast_or_null<clang::BlockDecl>(m_die_to_decl_ctx[die.GetDIE()]); 3782 3783 if (!decl) { 3784 DWARFDIE decl_context_die; 3785 clang::DeclContext *decl_context = 3786 GetClangDeclContextContainingDIE(die, &decl_context_die); 3787 decl = m_ast.CreateBlockDeclaration(decl_context); 3788 3789 if (decl) 3790 LinkDeclContextToDIE((clang::DeclContext *)decl, die); 3791 } 3792 3793 return decl; 3794 } 3795 return nullptr; 3796} 3797 3798clang::NamespaceDecl * 3799DWARFASTParserClang::ResolveNamespaceDIE(const DWARFDIE &die) { 3800 if (die && die.Tag() == DW_TAG_namespace) { 3801 // See if we already parsed this namespace DIE and associated it with a 3802 // uniqued namespace declaration 3803 clang::NamespaceDecl *namespace_decl = 3804 static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die.GetDIE()]); 3805 if (namespace_decl) 3806 return namespace_decl; 3807 else { 3808 const char *namespace_name = die.GetName(); 3809 clang::DeclContext *containing_decl_ctx = 3810 GetClangDeclContextContainingDIE(die, nullptr); 3811 namespace_decl = m_ast.GetUniqueNamespaceDeclaration(namespace_name, 3812 containing_decl_ctx); 3813 Log *log = 3814 nullptr; // (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO)); 3815 if (log) { 3816 SymbolFileDWARF *dwarf = die.GetDWARF(); 3817 if (namespace_name) { 3818 dwarf->GetObjectFile()->GetModule()->LogMessage( 3819 log, "ASTContext => %p: 0x%8.8" PRIx64 3820 ": DW_TAG_namespace with DW_AT_name(\"%s\") => " 3821 "clang::NamespaceDecl *%p (original = %p)", 3822 static_cast<void *>(m_ast.getASTContext()), die.GetID(), 3823 namespace_name, static_cast<void *>(namespace_decl), 3824 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3825 } else { 3826 dwarf->GetObjectFile()->GetModule()->LogMessage( 3827 log, "ASTContext => %p: 0x%8.8" PRIx64 3828 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p " 3829 "(original = %p)", 3830 static_cast<void *>(m_ast.getASTContext()), die.GetID(), 3831 static_cast<void *>(namespace_decl), 3832 static_cast<void *>(namespace_decl->getOriginalNamespace())); 3833 } 3834 } 3835 3836 if (namespace_decl) 3837 LinkDeclContextToDIE((clang::DeclContext *)namespace_decl, die); 3838 return namespace_decl; 3839 } 3840 } 3841 return nullptr; 3842} 3843 3844clang::DeclContext *DWARFASTParserClang::GetClangDeclContextContainingDIE( 3845 const DWARFDIE &die, DWARFDIE *decl_ctx_die_copy) { 3846 SymbolFileDWARF *dwarf = die.GetDWARF(); 3847 3848 DWARFDIE decl_ctx_die = dwarf->GetDeclContextDIEContainingDIE(die); 3849 3850 if (decl_ctx_die_copy) 3851 *decl_ctx_die_copy = decl_ctx_die; 3852 3853 if (decl_ctx_die) { 3854 clang::DeclContext *clang_decl_ctx = 3855 GetClangDeclContextForDIE(decl_ctx_die); 3856 if (clang_decl_ctx) 3857 return clang_decl_ctx; 3858 } 3859 return m_ast.GetTranslationUnitDecl(); 3860} 3861 3862clang::DeclContext * 3863DWARFASTParserClang::GetCachedClangDeclContextForDIE(const DWARFDIE &die) { 3864 if (die) { 3865 DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find(die.GetDIE()); 3866 if (pos != m_die_to_decl_ctx.end()) 3867 return pos->second; 3868 } 3869 return nullptr; 3870} 3871 3872void DWARFASTParserClang::LinkDeclContextToDIE(clang::DeclContext *decl_ctx, 3873 const DWARFDIE &die) { 3874 m_die_to_decl_ctx[die.GetDIE()] = decl_ctx; 3875 // There can be many DIEs for a single decl context 3876 // m_decl_ctx_to_die[decl_ctx].insert(die.GetDIE()); 3877 m_decl_ctx_to_die.insert(std::make_pair(decl_ctx, die)); 3878} 3879 3880bool DWARFASTParserClang::CopyUniqueClassMethodTypes( 3881 const DWARFDIE &src_class_die, const DWARFDIE &dst_class_die, 3882 lldb_private::Type *class_type, DWARFDIECollection &failures) { 3883 if (!class_type || !src_class_die || !dst_class_die) 3884 return false; 3885 if (src_class_die.Tag() != dst_class_die.Tag()) 3886 return false; 3887 3888 // We need to complete the class type so we can get all of the method types 3889 // parsed so we can then unique those types to their equivalent counterparts 3890 // in "dst_cu" and "dst_class_die" 3891 class_type->GetFullCompilerType(); 3892 3893 DWARFDIE src_die; 3894 DWARFDIE dst_die; 3895 UniqueCStringMap<DWARFDIE> src_name_to_die; 3896 UniqueCStringMap<DWARFDIE> dst_name_to_die; 3897 UniqueCStringMap<DWARFDIE> src_name_to_die_artificial; 3898 UniqueCStringMap<DWARFDIE> dst_name_to_die_artificial; 3899 for (src_die = src_class_die.GetFirstChild(); src_die.IsValid(); 3900 src_die = src_die.GetSibling()) { 3901 if (src_die.Tag() == DW_TAG_subprogram) { 3902 // Make sure this is a declaration and not a concrete instance by looking 3903 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3904 // are placed inside the class definitions and shouldn't be included in 3905 // the list of things are are tracking here. 3906 if (src_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 3907 const char *src_name = src_die.GetMangledName(); 3908 if (src_name) { 3909 ConstString src_const_name(src_name); 3910 if (src_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3911 src_name_to_die_artificial.Append(src_const_name, src_die); 3912 else 3913 src_name_to_die.Append(src_const_name, src_die); 3914 } 3915 } 3916 } 3917 } 3918 for (dst_die = dst_class_die.GetFirstChild(); dst_die.IsValid(); 3919 dst_die = dst_die.GetSibling()) { 3920 if (dst_die.Tag() == DW_TAG_subprogram) { 3921 // Make sure this is a declaration and not a concrete instance by looking 3922 // for DW_AT_declaration set to 1. Sometimes concrete function instances 3923 // are placed inside the class definitions and shouldn't be included in 3924 // the list of things are are tracking here. 3925 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 1) { 3926 const char *dst_name = dst_die.GetMangledName(); 3927 if (dst_name) { 3928 ConstString dst_const_name(dst_name); 3929 if (dst_die.GetAttributeValueAsUnsigned(DW_AT_artificial, 0)) 3930 dst_name_to_die_artificial.Append(dst_const_name, dst_die); 3931 else 3932 dst_name_to_die.Append(dst_const_name, dst_die); 3933 } 3934 } 3935 } 3936 } 3937 const uint32_t src_size = src_name_to_die.GetSize(); 3938 const uint32_t dst_size = dst_name_to_die.GetSize(); 3939 Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | 3940 // DWARF_LOG_TYPE_COMPLETION)); 3941 3942 // Is everything kosher so we can go through the members at top speed? 3943 bool fast_path = true; 3944 3945 if (src_size != dst_size) { 3946 if (src_size != 0 && dst_size != 0) { 3947 if (log) 3948 log->Printf("warning: trying to unique class DIE 0x%8.8x to 0x%8.8x, " 3949 "but they didn't have the same size (src=%d, dst=%d)", 3950 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3951 src_size, dst_size); 3952 } 3953 3954 fast_path = false; 3955 } 3956 3957 uint32_t idx; 3958 3959 if (fast_path) { 3960 for (idx = 0; idx < src_size; ++idx) { 3961 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 3962 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 3963 3964 if (src_die.Tag() != dst_die.Tag()) { 3965 if (log) 3966 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 3967 "but 0x%8.8x (%s) tags didn't match 0x%8.8x (%s)", 3968 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3969 src_die.GetOffset(), src_die.GetTagAsCString(), 3970 dst_die.GetOffset(), dst_die.GetTagAsCString()); 3971 fast_path = false; 3972 } 3973 3974 const char *src_name = src_die.GetMangledName(); 3975 const char *dst_name = dst_die.GetMangledName(); 3976 3977 // Make sure the names match 3978 if (src_name == dst_name || (strcmp(src_name, dst_name) == 0)) 3979 continue; 3980 3981 if (log) 3982 log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, " 3983 "but 0x%8.8x (%s) names didn't match 0x%8.8x (%s)", 3984 src_class_die.GetOffset(), dst_class_die.GetOffset(), 3985 src_die.GetOffset(), src_name, dst_die.GetOffset(), 3986 dst_name); 3987 3988 fast_path = false; 3989 } 3990 } 3991 3992 DWARFASTParserClang *src_dwarf_ast_parser = 3993 (DWARFASTParserClang *)src_die.GetDWARFParser(); 3994 DWARFASTParserClang *dst_dwarf_ast_parser = 3995 (DWARFASTParserClang *)dst_die.GetDWARFParser(); 3996 3997 // Now do the work of linking the DeclContexts and Types. 3998 if (fast_path) { 3999 // We can do this quickly. Just run across the tables index-for-index since 4000 // we know each node has matching names and tags. 4001 for (idx = 0; idx < src_size; ++idx) { 4002 src_die = src_name_to_die.GetValueAtIndexUnchecked(idx); 4003 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 4004 4005 clang::DeclContext *src_decl_ctx = 4006 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4007 if (src_decl_ctx) { 4008 if (log) 4009 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4010 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 4011 dst_die.GetOffset()); 4012 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 4013 } else { 4014 if (log) 4015 log->Printf("warning: tried to unique decl context from 0x%8.8x for " 4016 "0x%8.8x, but none was found", 4017 src_die.GetOffset(), dst_die.GetOffset()); 4018 } 4019 4020 Type *src_child_type = 4021 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4022 if (src_child_type) { 4023 if (log) 4024 log->Printf( 4025 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 4026 static_cast<void *>(src_child_type), src_child_type->GetID(), 4027 src_die.GetOffset(), dst_die.GetOffset()); 4028 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 4029 } else { 4030 if (log) 4031 log->Printf("warning: tried to unique lldb_private::Type from " 4032 "0x%8.8x for 0x%8.8x, but none was found", 4033 src_die.GetOffset(), dst_die.GetOffset()); 4034 } 4035 } 4036 } else { 4037 // We must do this slowly. For each member of the destination, look 4038 // up a member in the source with the same name, check its tag, and 4039 // unique them if everything matches up. Report failures. 4040 4041 if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty()) { 4042 src_name_to_die.Sort(); 4043 4044 for (idx = 0; idx < dst_size; ++idx) { 4045 ConstString dst_name = dst_name_to_die.GetCStringAtIndex(idx); 4046 dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx); 4047 src_die = src_name_to_die.Find(dst_name, DWARFDIE()); 4048 4049 if (src_die && (src_die.Tag() == dst_die.Tag())) { 4050 clang::DeclContext *src_decl_ctx = 4051 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4052 if (src_decl_ctx) { 4053 if (log) 4054 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4055 static_cast<void *>(src_decl_ctx), 4056 src_die.GetOffset(), dst_die.GetOffset()); 4057 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 4058 } else { 4059 if (log) 4060 log->Printf("warning: tried to unique decl context from 0x%8.8x " 4061 "for 0x%8.8x, but none was found", 4062 src_die.GetOffset(), dst_die.GetOffset()); 4063 } 4064 4065 Type *src_child_type = 4066 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4067 if (src_child_type) { 4068 if (log) 4069 log->Printf("uniquing type %p (uid=0x%" PRIx64 4070 ") from 0x%8.8x for 0x%8.8x", 4071 static_cast<void *>(src_child_type), 4072 src_child_type->GetID(), src_die.GetOffset(), 4073 dst_die.GetOffset()); 4074 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = 4075 src_child_type; 4076 } else { 4077 if (log) 4078 log->Printf("warning: tried to unique lldb_private::Type from " 4079 "0x%8.8x for 0x%8.8x, but none was found", 4080 src_die.GetOffset(), dst_die.GetOffset()); 4081 } 4082 } else { 4083 if (log) 4084 log->Printf("warning: couldn't find a match for 0x%8.8x", 4085 dst_die.GetOffset()); 4086 4087 failures.Append(dst_die); 4088 } 4089 } 4090 } 4091 } 4092 4093 const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize(); 4094 const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize(); 4095 4096 if (src_size_artificial && dst_size_artificial) { 4097 dst_name_to_die_artificial.Sort(); 4098 4099 for (idx = 0; idx < src_size_artificial; ++idx) { 4100 ConstString src_name_artificial = 4101 src_name_to_die_artificial.GetCStringAtIndex(idx); 4102 src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 4103 dst_die = 4104 dst_name_to_die_artificial.Find(src_name_artificial, DWARFDIE()); 4105 4106 if (dst_die) { 4107 // Both classes have the artificial types, link them 4108 clang::DeclContext *src_decl_ctx = 4109 src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()]; 4110 if (src_decl_ctx) { 4111 if (log) 4112 log->Printf("uniquing decl context %p from 0x%8.8x for 0x%8.8x", 4113 static_cast<void *>(src_decl_ctx), src_die.GetOffset(), 4114 dst_die.GetOffset()); 4115 dst_dwarf_ast_parser->LinkDeclContextToDIE(src_decl_ctx, dst_die); 4116 } else { 4117 if (log) 4118 log->Printf("warning: tried to unique decl context from 0x%8.8x " 4119 "for 0x%8.8x, but none was found", 4120 src_die.GetOffset(), dst_die.GetOffset()); 4121 } 4122 4123 Type *src_child_type = 4124 dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()]; 4125 if (src_child_type) { 4126 if (log) 4127 log->Printf( 4128 "uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x", 4129 static_cast<void *>(src_child_type), src_child_type->GetID(), 4130 src_die.GetOffset(), dst_die.GetOffset()); 4131 dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = src_child_type; 4132 } else { 4133 if (log) 4134 log->Printf("warning: tried to unique lldb_private::Type from " 4135 "0x%8.8x for 0x%8.8x, but none was found", 4136 src_die.GetOffset(), dst_die.GetOffset()); 4137 } 4138 } 4139 } 4140 } 4141 4142 if (dst_size_artificial) { 4143 for (idx = 0; idx < dst_size_artificial; ++idx) { 4144 ConstString dst_name_artificial = 4145 dst_name_to_die_artificial.GetCStringAtIndex(idx); 4146 dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked(idx); 4147 if (log) 4148 log->Printf("warning: need to create artificial method for 0x%8.8x for " 4149 "method '%s'", 4150 dst_die.GetOffset(), dst_name_artificial.GetCString()); 4151 4152 failures.Append(dst_die); 4153 } 4154 } 4155 4156 return (failures.Size() != 0); 4157} 4158