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/IPDBEnumChildren.h"
16 #include "llvm/DebugInfo/PDB/Native/NativeSession.h"
17 #include "llvm/DebugInfo/PDB/Native/SymbolCache.h"
18 #include "llvm/DebugInfo/PDB/PDBSymbol.h"
19 #include "llvm/DebugInfo/PDB/PDBTypes.h"
20
21 using namespace llvm;
22 using namespace llvm::codeview;
23 using namespace llvm::pdb;
24
NativeEnumTypes(NativeSession & PDBSession,LazyRandomTypeCollection & Types,std::vector<codeview::TypeLeafKind> Kinds)25 NativeEnumTypes::NativeEnumTypes(NativeSession &PDBSession,
26 LazyRandomTypeCollection &Types,
27 std::vector<codeview::TypeLeafKind> Kinds)
28 : Index(0), Session(PDBSession) {
29 std::optional<TypeIndex> TI = Types.getFirst();
30 while (TI) {
31 CVType CVT = Types.getType(*TI);
32 TypeLeafKind K = CVT.kind();
33 if (llvm::is_contained(Kinds, K)) {
34 // Don't add forward refs, we'll find those later while enumerating.
35 if (!isUdtForwardRef(CVT))
36 Matches.push_back(*TI);
37 } else if (K == TypeLeafKind::LF_MODIFIER) {
38 TypeIndex ModifiedTI = getModifiedType(CVT);
39 if (!ModifiedTI.isSimple()) {
40 CVType UnmodifiedCVT = Types.getType(ModifiedTI);
41 // LF_MODIFIERs point to forward refs, but don't worry about that
42 // here. We're pushing the TypeIndex of the LF_MODIFIER itself,
43 // so we'll worry about resolving forward refs later.
44 if (llvm::is_contained(Kinds, UnmodifiedCVT.kind()))
45 Matches.push_back(*TI);
46 }
47 }
48 TI = Types.getNext(*TI);
49 }
50 }
51
NativeEnumTypes(NativeSession & PDBSession,std::vector<codeview::TypeIndex> Indices)52 NativeEnumTypes::NativeEnumTypes(NativeSession &PDBSession,
53 std::vector<codeview::TypeIndex> Indices)
54 : Matches(std::move(Indices)), Index(0), Session(PDBSession) {}
55
getChildCount() const56 uint32_t NativeEnumTypes::getChildCount() const {
57 return static_cast<uint32_t>(Matches.size());
58 }
59
getChildAtIndex(uint32_t N) const60 std::unique_ptr<PDBSymbol> NativeEnumTypes::getChildAtIndex(uint32_t N) const {
61 if (N < Matches.size()) {
62 SymIndexId Id = Session.getSymbolCache().findSymbolByTypeIndex(Matches[N]);
63 return Session.getSymbolCache().getSymbolById(Id);
64 }
65 return nullptr;
66 }
67
getNext()68 std::unique_ptr<PDBSymbol> NativeEnumTypes::getNext() {
69 return getChildAtIndex(Index++);
70 }
71
reset()72 void NativeEnumTypes::reset() { Index = 0; }
73