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
21using namespace llvm;
22using namespace llvm::codeview;
23using namespace llvm::pdb;
24
25NativeEnumTypes::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(Index: *TI);
32 TypeLeafKind K = CVT.kind();
33 if (llvm::is_contained(Range&: Kinds, Element: K)) {
34 // Don't add forward refs, we'll find those later while enumerating.
35 if (!isUdtForwardRef(CVT))
36 Matches.push_back(x: *TI);
37 } else if (K == TypeLeafKind::LF_MODIFIER) {
38 TypeIndex ModifiedTI = getModifiedType(CVT);
39 if (!ModifiedTI.isSimple()) {
40 CVType UnmodifiedCVT = Types.getType(Index: 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(Range&: Kinds, Element: UnmodifiedCVT.kind()))
45 Matches.push_back(x: *TI);
46 }
47 }
48 TI = Types.getNext(Prev: *TI);
49 }
50}
51
52NativeEnumTypes::NativeEnumTypes(NativeSession &PDBSession,
53 std::vector<codeview::TypeIndex> Indices)
54 : Matches(std::move(Indices)), Index(0), Session(PDBSession) {}
55
56uint32_t NativeEnumTypes::getChildCount() const {
57 return static_cast<uint32_t>(Matches.size());
58}
59
60std::unique_ptr<PDBSymbol> NativeEnumTypes::getChildAtIndex(uint32_t N) const {
61 if (N < Matches.size()) {
62 SymIndexId Id = Session.getSymbolCache().findSymbolByTypeIndex(TI: Matches[N]);
63 return Session.getSymbolCache().getSymbolById(SymbolId: Id);
64 }
65 return nullptr;
66}
67
68std::unique_ptr<PDBSymbol> NativeEnumTypes::getNext() {
69 return getChildAtIndex(N: Index++);
70}
71
72void NativeEnumTypes::reset() { Index = 0; }
73

source code of llvm/lib/DebugInfo/PDB/Native/NativeEnumTypes.cpp