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  1. //===- ModuleDebugStream.h - PDB Module Info Stream Access ------*- 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_PDB_NATIVE_MODULEDEBUGSTREAM_H
  10. #define LLVM_DEBUGINFO_PDB_NATIVE_MODULEDEBUGSTREAM_H
  11.  
  12. #include "llvm/ADT/iterator_range.h"
  13. #include "llvm/DebugInfo/CodeView/CVRecord.h"
  14. #include "llvm/DebugInfo/CodeView/DebugSubsectionRecord.h"
  15. #include "llvm/DebugInfo/PDB/Native/DbiModuleDescriptor.h"
  16. #include "llvm/Support/BinaryStreamRef.h"
  17. #include "llvm/Support/Error.h"
  18. #include <cstdint>
  19. #include <memory>
  20.  
  21. namespace llvm {
  22. class BinaryStreamReader;
  23. namespace codeview {
  24. class DebugChecksumsSubsectionRef;
  25. }
  26. namespace msf {
  27. class MappedBlockStream;
  28. }
  29. namespace pdb {
  30.  
  31. class ModuleDebugStreamRef {
  32.   using DebugSubsectionIterator = codeview::DebugSubsectionArray::Iterator;
  33.  
  34. public:
  35.   ModuleDebugStreamRef(const DbiModuleDescriptor &Module,
  36.                        std::unique_ptr<msf::MappedBlockStream> Stream);
  37.   ModuleDebugStreamRef(ModuleDebugStreamRef &&Other) = default;
  38.   ModuleDebugStreamRef(const ModuleDebugStreamRef &Other) = default;
  39.   ~ModuleDebugStreamRef();
  40.  
  41.   Error reload();
  42.  
  43.   uint32_t signature() const { return Signature; }
  44.  
  45.   iterator_range<codeview::CVSymbolArray::Iterator>
  46.   symbols(bool *HadError) const;
  47.  
  48.   const codeview::CVSymbolArray &getSymbolArray() const { return SymbolArray; }
  49.   const codeview::CVSymbolArray
  50.   getSymbolArrayForScope(uint32_t ScopeBegin) const;
  51.  
  52.   BinarySubstreamRef getSymbolsSubstream() const;
  53.   BinarySubstreamRef getC11LinesSubstream() const;
  54.   BinarySubstreamRef getC13LinesSubstream() const;
  55.   BinarySubstreamRef getGlobalRefsSubstream() const;
  56.  
  57.   ModuleDebugStreamRef &operator=(ModuleDebugStreamRef &&Other) = delete;
  58.  
  59.   codeview::CVSymbol readSymbolAtOffset(uint32_t Offset) const;
  60.  
  61.   iterator_range<DebugSubsectionIterator> subsections() const;
  62.   codeview::DebugSubsectionArray getSubsectionsArray() const {
  63.     return Subsections;
  64.   }
  65.  
  66.   bool hasDebugSubsections() const;
  67.  
  68.   Error commit();
  69.  
  70.   Expected<codeview::DebugChecksumsSubsectionRef>
  71.   findChecksumsSubsection() const;
  72.  
  73. private:
  74.   Error reloadSerialize(BinaryStreamReader &Reader);
  75.  
  76.   DbiModuleDescriptor Mod;
  77.  
  78.   uint32_t Signature;
  79.  
  80.   std::shared_ptr<msf::MappedBlockStream> Stream;
  81.  
  82.   codeview::CVSymbolArray SymbolArray;
  83.  
  84.   BinarySubstreamRef SymbolsSubstream;
  85.   BinarySubstreamRef C11LinesSubstream;
  86.   BinarySubstreamRef C13LinesSubstream;
  87.   BinarySubstreamRef GlobalRefsSubstream;
  88.  
  89.   codeview::DebugSubsectionArray Subsections;
  90. };
  91.  
  92. } // end namespace pdb
  93. } // end namespace llvm
  94.  
  95. #endif // LLVM_DEBUGINFO_PDB_NATIVE_MODULEDEBUGSTREAM_H
  96.