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/ADT/STLExtras.h" 12 #include "llvm/DebugInfo/CodeView/CVRecord.h" 13 #include "llvm/DebugInfo/CodeView/LazyRandomTypeCollection.h" 14 #include "llvm/DebugInfo/CodeView/TypeRecordHelpers.h" 15 #include "llvm/DebugInfo/PDB/Native/NativeSession.h" 16 #include "llvm/DebugInfo/PDB/Native/SymbolCache.h" 17 #include "llvm/DebugInfo/PDB/PDBSymbol.h" 18 #include "llvm/DebugInfo/PDB/PDBTypes.h" 19 20 using namespace llvm; 21 using namespace llvm::codeview; 22 using namespace llvm::pdb; 23 24 NativeEnumTypes::NativeEnumTypes(NativeSession &PDBSession, 25 LazyRandomTypeCollection &Types, 26 std::vector<codeview::TypeLeafKind> Kinds) 27 : Index(0), Session(PDBSession) { 28 std::optional<TypeIndex> TI = Types.getFirst(); 29 while (TI) { 30 CVType CVT = Types.getType(*TI); 31 TypeLeafKind K = CVT.kind(); 32 if (llvm::is_contained(Kinds, K)) { 33 // Don't add forward refs, we'll find those later while enumerating. 34 if (!isUdtForwardRef(CVT)) 35 Matches.push_back(*TI); 36 } else if (K == TypeLeafKind::LF_MODIFIER) { 37 TypeIndex ModifiedTI = getModifiedType(CVT); 38 if (!ModifiedTI.isSimple()) { 39 CVType UnmodifiedCVT = Types.getType(ModifiedTI); 40 // LF_MODIFIERs point to forward refs, but don't worry about that 41 // here. We're pushing the TypeIndex of the LF_MODIFIER itself, 42 // so we'll worry about resolving forward refs later. 43 if (llvm::is_contained(Kinds, UnmodifiedCVT.kind())) 44 Matches.push_back(*TI); 45 } 46 } 47 TI = Types.getNext(*TI); 48 } 49 } 50 51 NativeEnumTypes::NativeEnumTypes(NativeSession &PDBSession, 52 std::vector<codeview::TypeIndex> Indices) 53 : Matches(std::move(Indices)), Index(0), Session(PDBSession) {} 54 55 uint32_t NativeEnumTypes::getChildCount() const { 56 return static_cast<uint32_t>(Matches.size()); 57 } 58 59 std::unique_ptr<PDBSymbol> NativeEnumTypes::getChildAtIndex(uint32_t N) const { 60 if (N < Matches.size()) { 61 SymIndexId Id = Session.getSymbolCache().findSymbolByTypeIndex(Matches[N]); 62 return Session.getSymbolCache().getSymbolById(Id); 63 } 64 return nullptr; 65 } 66 67 std::unique_ptr<PDBSymbol> NativeEnumTypes::getNext() { 68 return getChildAtIndex(Index++); 69 } 70 71 void NativeEnumTypes::reset() { Index = 0; } 72