1 //==- NativeEnumTypes.cpp - Native Type Enumerator impl ----------*- C++ -*-==// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "llvm/DebugInfo/PDB/Native/NativeEnumTypes.h" 10 11 #include "llvm/DebugInfo/CodeView/TypeDeserializer.h" 12 #include "llvm/DebugInfo/CodeView/TypeRecordHelpers.h" 13 #include "llvm/DebugInfo/PDB/IPDBEnumChildren.h" 14 #include "llvm/DebugInfo/PDB/Native/NativeSession.h" 15 #include "llvm/DebugInfo/PDB/Native/NativeTypeEnum.h" 16 #include "llvm/DebugInfo/PDB/PDBSymbol.h" 17 #include "llvm/DebugInfo/PDB/PDBSymbolTypeEnum.h" 18 19 using namespace llvm; 20 using namespace llvm::codeview; 21 using namespace llvm::pdb; 22 23 NativeEnumTypes::NativeEnumTypes(NativeSession &PDBSession, 24 LazyRandomTypeCollection &Types, 25 std::vector<codeview::TypeLeafKind> Kinds) 26 : Matches(), Index(0), Session(PDBSession) { 27 Optional<TypeIndex> TI = Types.getFirst(); 28 while (TI) { 29 CVType CVT = Types.getType(*TI); 30 TypeLeafKind K = CVT.kind(); 31 if (llvm::is_contained(Kinds, K)) { 32 // Don't add forward refs, we'll find those later while enumerating. 33 if (!isUdtForwardRef(CVT)) 34 Matches.push_back(*TI); 35 } else if (K == TypeLeafKind::LF_MODIFIER) { 36 TypeIndex ModifiedTI = getModifiedType(CVT); 37 if (!ModifiedTI.isSimple()) { 38 CVType UnmodifiedCVT = Types.getType(ModifiedTI); 39 // LF_MODIFIERs point to forward refs, but don't worry about that 40 // here. We're pushing the TypeIndex of the LF_MODIFIER itself, 41 // so we'll worry about resolving forward refs later. 42 if (llvm::is_contained(Kinds, UnmodifiedCVT.kind())) 43 Matches.push_back(*TI); 44 } 45 } 46 TI = Types.getNext(*TI); 47 } 48 } 49 50 NativeEnumTypes::NativeEnumTypes(NativeSession &PDBSession, 51 std::vector<codeview::TypeIndex> Indices) 52 : Matches(std::move(Indices)), Index(0), Session(PDBSession) {} 53 54 uint32_t NativeEnumTypes::getChildCount() const { 55 return static_cast<uint32_t>(Matches.size()); 56 } 57 58 std::unique_ptr<PDBSymbol> NativeEnumTypes::getChildAtIndex(uint32_t N) const { 59 if (N < Matches.size()) { 60 SymIndexId Id = Session.getSymbolCache().findSymbolByTypeIndex(Matches[N]); 61 return Session.getSymbolCache().getSymbolById(Id); 62 } 63 return nullptr; 64 } 65 66 std::unique_ptr<PDBSymbol> NativeEnumTypes::getNext() { 67 return getChildAtIndex(Index++); 68 } 69 70 void NativeEnumTypes::reset() { Index = 0; } 71