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/CodeView.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 <cassert>
20 #include <cstdint>
21 #include <memory>
22 #include <vector>
23 
24 namespace llvm {
25 namespace codeview {
26 
27 class ContinuationRecordBuilder;
28 
29 class AppendingTypeTableBuilder : public TypeCollection {
30 
31   BumpPtrAllocator &RecordStorage;
32   SimpleTypeSerializer SimpleSerializer;
33 
34   /// Contains a list of all records indexed by TypeIndex.toArrayIndex().
35   SmallVector<ArrayRef<uint8_t>, 2> SeenRecords;
36 
37 public:
38   explicit AppendingTypeTableBuilder(BumpPtrAllocator &Storage);
39   ~AppendingTypeTableBuilder();
40 
41   // TypeCollection overrides
42   Optional<TypeIndex> getFirst() override;
43   Optional<TypeIndex> getNext(TypeIndex Prev) override;
44   CVType getType(TypeIndex Index) override;
45   StringRef getTypeName(TypeIndex Index) override;
46   bool contains(TypeIndex Index) override;
47   uint32_t size() override;
48   uint32_t capacity() override;
49   bool replaceType(TypeIndex &Index, CVType Data, bool Stabilize) override;
50 
51   // public interface
52   void reset();
53   TypeIndex nextTypeIndex() const;
54 
getAllocator()55   BumpPtrAllocator &getAllocator() { return RecordStorage; }
56 
57   ArrayRef<ArrayRef<uint8_t>> records() const;
58   TypeIndex insertRecordBytes(ArrayRef<uint8_t> &Record);
59   TypeIndex insertRecord(ContinuationRecordBuilder &Builder);
60 
writeLeafType(T & Record)61   template <typename T> TypeIndex writeLeafType(T &Record) {
62     ArrayRef<uint8_t> Data = SimpleSerializer.serialize(Record);
63     return insertRecordBytes(Data);
64   }
65 };
66 
67 } // end namespace codeview
68 } // end namespace llvm
69 
70 #endif // LLVM_DEBUGINFO_CODEVIEW_TYPETABLEBUILDER_H
71