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//===- MappedBlockStream.h - Reads stream data from a PDBFile ---*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_DEBUGINFO_PDB_RAW_MAPPEDBLOCKSTREAM_H
#define LLVM_DEBUGINFO_PDB_RAW_MAPPEDBLOCKSTREAM_H
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/DebugInfo/CodeView/StreamInterface.h"
#include "llvm/DebugInfo/PDB/Raw/IPDBStreamData.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Support/Endian.h"
#include "llvm/Support/Error.h"
#include <cstdint>
#include <vector>
namespace llvm {
namespace pdb {
class IPDBFile;
class PDBFile;
class MappedBlockStream : public codeview::StreamInterface {
public:
Error readBytes(uint32_t Offset, uint32_t Size,
ArrayRef<uint8_t> &Buffer) const override;
Error readLongestContiguousChunk(uint32_t Offset,
ArrayRef<uint8_t> &Buffer) const override;
Error writeBytes(uint32_t Offset, ArrayRef<uint8_t> Buffer) const override;
uint32_t getLength() const override;
Error commit() const override;
uint32_t getNumBytesCopied() const;
static Expected<std::unique_ptr<MappedBlockStream>>
createIndexedStream(uint32_t StreamIdx, const IPDBFile &File);
static Expected<std::unique_ptr<MappedBlockStream>>
createDirectoryStream(const PDBFile &File);
llvm::BumpPtrAllocator &getAllocator() { return Pool; }
protected:
MappedBlockStream(std::unique_ptr<IPDBStreamData> Data, const IPDBFile &File);
Error readBytes(uint32_t Offset, MutableArrayRef<uint8_t> Buffer) const;
bool tryReadContiguously(uint32_t Offset, uint32_t Size,
ArrayRef<uint8_t> &Buffer) const;
const IPDBFile &Pdb;
std::unique_ptr<IPDBStreamData> Data;
typedef MutableArrayRef<uint8_t> CacheEntry;
mutable llvm::BumpPtrAllocator Pool;
mutable DenseMap<uint32_t, std::vector<CacheEntry>> CacheMap;
};
} // end namespace pdb
} // end namespace llvm
#endif // LLVM_DEBUGINFO_PDB_RAW_MAPPEDBLOCKSTREAM_H
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