contrib/llvm/include/llvm/DebugInfo/CodeView/DebugCrossImpSubsection.h

   1 //===- DebugCrossExSubsection.h ---------------------------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #ifndef LLVM_DEBUGINFO_CODEVIEW_DEBUGCROSSIMPSUBSECTION_H
  11 #define LLVM_DEBUGINFO_CODEVIEW_DEBUGCROSSIMPSUBSECTION_H
  12
  13 #include "llvm/ADT/StringMap.h"
  14 #include "llvm/ADT/StringRef.h"
  15 #include "llvm/DebugInfo/CodeView/CodeView.h"
  16 #include "llvm/DebugInfo/CodeView/DebugSubsection.h"
  17 #include "llvm/Support/BinaryStreamArray.h"
  18 #include "llvm/Support/BinaryStreamReader.h"
  19 #include "llvm/Support/BinaryStreamRef.h"
  20 #include "llvm/Support/Endian.h"
  21 #include "llvm/Support/Error.h"
  22 #include <cstdint>
  23 #include <vector>
  24
  25 namespace llvm {
  26
  27 namespace codeview {
  28
  29 struct CrossModuleImportItem {
  30   const CrossModuleImport *Header = nullptr;
  31   FixedStreamArray<support::ulittle32_t> Imports;
  32 };
  33
  34 } // end namespace codeview
  35
  36 template <> struct VarStreamArrayExtractor<codeview::CrossModuleImportItem> {
  37 public:
  38   using ContextType = void;
  39
  40   Error operator()(BinaryStreamRef Stream, uint32_t &Len,
  41                    codeview::CrossModuleImportItem &Item);
  42 };
  43
  44 namespace codeview {
  45
  46 class DebugStringTableSubsection;
  47
  48 class DebugCrossModuleImportsSubsectionRef final : public DebugSubsectionRef {
  49   using ReferenceArray = VarStreamArray<CrossModuleImportItem>;
  50   using Iterator = ReferenceArray::Iterator;
  51
  52 public:
  53   DebugCrossModuleImportsSubsectionRef()
  54       : DebugSubsectionRef(DebugSubsectionKind::CrossScopeImports) {}
  55
  56   static bool classof(const DebugSubsectionRef *S) {
  57     return S->kind() == DebugSubsectionKind::CrossScopeImports;
  58   }
  59
  60   Error initialize(BinaryStreamReader Reader);
  61   Error initialize(BinaryStreamRef Stream);
  62
  63   Iterator begin() const { return References.begin(); }
  64   Iterator end() const { return References.end(); }
  65
  66 private:
  67   ReferenceArray References;
  68 };
  69
  70 class DebugCrossModuleImportsSubsection final : public DebugSubsection {
  71 public:
  72   explicit DebugCrossModuleImportsSubsection(
  73       DebugStringTableSubsection &Strings)
  74       : DebugSubsection(DebugSubsectionKind::CrossScopeImports),
  75         Strings(Strings) {}
  76
  77   static bool classof(const DebugSubsection *S) {
  78     return S->kind() == DebugSubsectionKind::CrossScopeImports;
  79   }
  80
  81   void addImport(StringRef Module, uint32_t ImportId);
  82
  83   uint32_t calculateSerializedSize() const override;
  84   Error commit(BinaryStreamWriter &Writer) const override;
  85
  86 private:
  87   DebugStringTableSubsection &Strings;
  88   StringMap<std::vector<support::ulittle32_t>> Mappings;
  89 };
  90
  91 } // end namespace codeview
  92
  93 } // end namespace llvm
  94
  95 #endif // LLVM_DEBUGINFO_CODEVIEW_DEBUGCROSSIMPSUBSECTION_H