ModuleDebugStream.h

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//===- ModuleDebugStream.h - PDB Module Info Stream Access ------*- 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_PDB_NATIVE_MODULEDEBUGSTREAM_H
#define LLVM_DEBUGINFO_PDB_NATIVE_MODULEDEBUGSTREAM_H
 
#include "llvm/ADT/iterator_range.h"
#include "llvm/DebugInfo/CodeView/CVRecord.h"
#include "llvm/DebugInfo/CodeView/DebugSubsectionRecord.h"
#include "llvm/DebugInfo/PDB/Native/DbiModuleDescriptor.h"
#include "llvm/Support/BinaryStreamRef.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Error.h"
#include <cstdint>
#include <memory>
 
namespace llvm {
class BinaryStreamReader;
namespace codeview {
class DebugChecksumsSubsectionRef;
}
namespace msf {
class MappedBlockStream;
}
namespace pdb {
 
class ModuleDebugStreamRef {
  using DebugSubsectionIterator = codeview::DebugSubsectionArray::Iterator;
 
public:
  LLVM_ABI ModuleDebugStreamRef(const DbiModuleDescriptor &Module,
                                std::unique_ptr<msf::MappedBlockStream> Stream);
  ModuleDebugStreamRef(ModuleDebugStreamRef &&Other) = default;
  ModuleDebugStreamRef(const ModuleDebugStreamRef &Other) = default;
  LLVM_ABI ~ModuleDebugStreamRef();
 
  LLVM_ABI Error reload();
 
  uint32_t signature() const { return Signature; }
 
  LLVM_ABI iterator_range<codeview::CVSymbolArray::Iterator>
  symbols(bool *HadError) const;
 
  const codeview::CVSymbolArray &getSymbolArray() const { return SymbolArray; }
  LLVM_ABI const codeview::CVSymbolArray
  getSymbolArrayForScope(uint32_t ScopeBegin) const;
 
  LLVM_ABI BinarySubstreamRef getSymbolsSubstream() const;
  LLVM_ABI BinarySubstreamRef getC11LinesSubstream() const;
  LLVM_ABI BinarySubstreamRef getC13LinesSubstream() const;
  LLVM_ABI BinarySubstreamRef getGlobalRefsSubstream() const;
 
  ModuleDebugStreamRef &operator=(ModuleDebugStreamRef &&Other) = delete;
 
  LLVM_ABI codeview::CVSymbol readSymbolAtOffset(uint32_t Offset) const;
 
  LLVM_ABI iterator_range<DebugSubsectionIterator> subsections() const;
  codeview::DebugSubsectionArray getSubsectionsArray() const {
    return Subsections;
  }
 
  LLVM_ABI bool hasDebugSubsections() const;
 
  LLVM_ABI Error commit();
 
  LLVM_ABI Expected<codeview::DebugChecksumsSubsectionRef>
  findChecksumsSubsection() const;
 
private:
  Error reloadSerialize(BinaryStreamReader &Reader);
 
  DbiModuleDescriptor Mod;
 
  uint32_t Signature;
 
  std::shared_ptr<msf::MappedBlockStream> Stream;
 
  codeview::CVSymbolArray SymbolArray;
 
  BinarySubstreamRef SymbolsSubstream;
  BinarySubstreamRef C11LinesSubstream;
  BinarySubstreamRef C13LinesSubstream;
  BinarySubstreamRef GlobalRefsSubstream;
 
  codeview::DebugSubsectionArray Subsections;
};
 
} // end namespace pdb
} // end namespace llvm
 
#endif // LLVM_DEBUGINFO_PDB_NATIVE_MODULEDEBUGSTREAM_H