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