Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

//===- DebugChecksumsSubsection.h -------------------------------*- C++ -*-===//

//

// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

// See https://llvm.org/LICENSE.txt for license information.

// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

//

//===----------------------------------------------------------------------===//

#ifndef LLVM_DEBUGINFO_CODEVIEW_DEBUGCHECKSUMSSUBSECTION_H

#define LLVM_DEBUGINFO_CODEVIEW_DEBUGCHECKSUMSSUBSECTION_H

#include "llvm/ADT/ArrayRef.h"

#include "llvm/ADT/DenseMap.h"

#include "llvm/ADT/StringRef.h"

#include "llvm/DebugInfo/CodeView/CodeView.h"

#include "llvm/DebugInfo/CodeView/DebugSubsection.h"

#include "llvm/Support/Allocator.h"

#include "llvm/Support/BinaryStreamArray.h"

#include "llvm/Support/BinaryStreamRef.h"

#include "llvm/Support/Error.h"

#include <cstdint>

#include <vector>

namespace llvm {

class BinaryStreamReader;

class BinaryStreamWriter;

namespace codeview {

class DebugStringTableSubsection;

struct FileChecksumEntry {

  uint32_t FileNameOffset;    // Byte offset of filename in global stringtable.

  FileChecksumKind Kind;      // The type of checksum.

  ArrayRef<uint8_t> Checksum; // The bytes of the checksum.

};

} // end namespace codeview

template <> struct VarStreamArrayExtractor<codeview::FileChecksumEntry> {

public:

  using ContextType = void;

  Error operator()(BinaryStreamRef Stream, uint32_t &Len,

                   codeview::FileChecksumEntry &Item);

};

namespace codeview {

class DebugChecksumsSubsectionRef final : public DebugSubsectionRef {

  using FileChecksumArray = VarStreamArray<codeview::FileChecksumEntry>;

  using Iterator = FileChecksumArray::Iterator;

public:

  DebugChecksumsSubsectionRef()

      : DebugSubsectionRef(DebugSubsectionKind::FileChecksums) {}

  static bool classof(const DebugSubsectionRef *S) {

    return S->kind() == DebugSubsectionKind::FileChecksums;

  }

  bool valid() const { return Checksums.valid(); }

  Error initialize(BinaryStreamReader Reader);

  Error initialize(BinaryStreamRef Stream);

  Iterator begin() const { return Checksums.begin(); }

  Iterator end() const { return Checksums.end(); }

  const FileChecksumArray &getArray() const { return Checksums; }

private:

  FileChecksumArray Checksums;

};

class DebugChecksumsSubsection final : public DebugSubsection {

public:

  explicit DebugChecksumsSubsection(DebugStringTableSubsection &Strings);

  static bool classof(const DebugSubsection *S) {

    return S->kind() == DebugSubsectionKind::FileChecksums;

  }

  void addChecksum(StringRef FileName, FileChecksumKind Kind,

                   ArrayRef<uint8_t> Bytes);

  uint32_t calculateSerializedSize() const override;

  Error commit(BinaryStreamWriter &Writer) const override;

  uint32_t mapChecksumOffset(StringRef FileName) const;

private:

  DebugStringTableSubsection &Strings;

  DenseMap<uint32_t, uint32_t> OffsetMap;

  uint32_t SerializedSize = 0;

  BumpPtrAllocator Storage;

  std::vector<FileChecksumEntry> Checksums;

};

} // end namespace codeview

} // end namespace llvm

#endif // LLVM_DEBUGINFO_CODEVIEW_DEBUGCHECKSUMSSUBSECTION_H