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      1 //===- ContinuationRecordBuilder.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_CONTINUATIONRECORDBUILDER_H
     10 #define LLVM_DEBUGINFO_CODEVIEW_CONTINUATIONRECORDBUILDER_H
     11 
     12 #include "llvm/ADT/ArrayRef.h"
     13 #include "llvm/ADT/Optional.h"
     14 #include "llvm/ADT/SmallVector.h"
     15 #include "llvm/DebugInfo/CodeView/CodeView.h"
     16 #include "llvm/DebugInfo/CodeView/RecordSerialization.h"
     17 #include "llvm/DebugInfo/CodeView/TypeIndex.h"
     18 #include "llvm/DebugInfo/CodeView/TypeRecord.h"
     19 #include "llvm/DebugInfo/CodeView/TypeRecordMapping.h"
     20 #include "llvm/DebugInfo/CodeView/TypeVisitorCallbacks.h"
     21 #include "llvm/Support/BinaryByteStream.h"
     22 #include "llvm/Support/BinaryStreamWriter.h"
     23 #include "llvm/Support/Error.h"
     24 #include <cassert>
     25 #include <cstdint>
     26 #include <memory>
     27 #include <vector>
     28 
     29 namespace llvm {
     30 namespace codeview {
     31 enum class ContinuationRecordKind { FieldList, MethodOverloadList };
     32 
     33 class ContinuationRecordBuilder {
     34   SmallVector<uint32_t, 4> SegmentOffsets;
     35   Optional<ContinuationRecordKind> Kind;
     36   AppendingBinaryByteStream Buffer;
     37   BinaryStreamWriter SegmentWriter;
     38   TypeRecordMapping Mapping;
     39   ArrayRef<uint8_t> InjectedSegmentBytes;
     40 
     41   uint32_t getCurrentSegmentLength() const;
     42 
     43   void insertSegmentEnd(uint32_t Offset);
     44   CVType createSegmentRecord(uint32_t OffBegin, uint32_t OffEnd,
     45                              Optional<TypeIndex> RefersTo);
     46 
     47 public:
     48   ContinuationRecordBuilder();
     49   ~ContinuationRecordBuilder();
     50 
     51   void begin(ContinuationRecordKind RecordKind);
     52 
     53   // This template is explicitly instantiated in the implementation file for all
     54   // supported types.  The method itself is ugly, so inlining it into the header
     55   // file clutters an otherwise straightforward interface.
     56   template <typename RecordType> void writeMemberType(RecordType &Record);
     57 
     58   std::vector<CVType> end(TypeIndex Index);
     59 };
     60 } // namespace codeview
     61 } // namespace llvm
     62 
     63 #endif
     64