1 //===- AppendingTypeTableBuilder.h -------------------------------*- 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 #ifndef LLVM_DEBUGINFO_CODEVIEW_APPENDINGTYPETABLEBUILDER_H
10 #define LLVM_DEBUGINFO_CODEVIEW_APPENDINGTYPETABLEBUILDER_H
11 
12 #include "llvm/ADT/ArrayRef.h"
13 #include "llvm/ADT/SmallVector.h"
14 #include "llvm/DebugInfo/CodeView/CVRecord.h"
15 #include "llvm/DebugInfo/CodeView/SimpleTypeSerializer.h"
16 #include "llvm/DebugInfo/CodeView/TypeCollection.h"
17 #include "llvm/DebugInfo/CodeView/TypeIndex.h"
18 #include "llvm/Support/Allocator.h"
19 #include <cstdint>
20 
21 namespace llvm {
22 namespace codeview {
23 
24 class ContinuationRecordBuilder;
25 
26 class AppendingTypeTableBuilder : public TypeCollection {
27 
28   BumpPtrAllocator &RecordStorage;
29   SimpleTypeSerializer SimpleSerializer;
30 
31   /// Contains a list of all records indexed by TypeIndex.toArrayIndex().
32   SmallVector<ArrayRef<uint8_t>, 2> SeenRecords;
33 
34 public:
35   explicit AppendingTypeTableBuilder(BumpPtrAllocator &Storage);
36   ~AppendingTypeTableBuilder();
37 
38   // TypeCollection overrides
39   Optional<TypeIndex> getFirst() override;
40   Optional<TypeIndex> getNext(TypeIndex Prev) override;
41   CVType getType(TypeIndex Index) override;
42   StringRef getTypeName(TypeIndex Index) override;
43   bool contains(TypeIndex Index) override;
44   uint32_t size() override;
45   uint32_t capacity() override;
46   bool replaceType(TypeIndex &Index, CVType Data, bool Stabilize) override;
47 
48   // public interface
49   void reset();
50   TypeIndex nextTypeIndex() const;
51 
52   BumpPtrAllocator &getAllocator() { return RecordStorage; }
53 
54   ArrayRef<ArrayRef<uint8_t>> records() const;
55   TypeIndex insertRecordBytes(ArrayRef<uint8_t> &Record);
56   TypeIndex insertRecord(ContinuationRecordBuilder &Builder);
57 
58   template <typename T> TypeIndex writeLeafType(T &Record) {
59     ArrayRef<uint8_t> Data = SimpleSerializer.serialize(Record);
60     return insertRecordBytes(Data);
61   }
62 };
63 
64 } // end namespace codeview
65 } // end namespace llvm
66 
67 #endif // LLVM_DEBUGINFO_CODEVIEW_APPENDINGTYPETABLEBUILDER_H
68