LCOV - code coverage report
Current view: top level - include/llvm/DebugInfo/DWARF - DWARFUnitIndex.h (source / functions) Hit Total Coverage
Test: llvm-toolchain.info Lines: 7 7 100.0 %
Date: 2017-09-14 15:23:50 Functions: 1 1 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : //===- DWARFUnitIndex.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_DWARF_DWARFUNITINDEX_H
      11             : #define LLVM_DEBUGINFO_DWARF_DWARFUNITINDEX_H
      12             : 
      13             : #include "llvm/ADT/ArrayRef.h"
      14             : #include "llvm/ADT/StringRef.h"
      15             : #include "llvm/Support/DataExtractor.h"
      16             : #include <cstdint>
      17             : #include <memory>
      18             : 
      19             : namespace llvm {
      20             : 
      21             : class raw_ostream;
      22             : 
      23             : enum DWARFSectionKind {
      24             :   DW_SECT_INFO = 1,
      25             :   DW_SECT_TYPES,
      26             :   DW_SECT_ABBREV,
      27             :   DW_SECT_LINE,
      28             :   DW_SECT_LOC,
      29             :   DW_SECT_STR_OFFSETS,
      30             :   DW_SECT_MACINFO,
      31             :   DW_SECT_MACRO,
      32             : };
      33             : 
      34        3051 : class DWARFUnitIndex {
      35        1017 :   struct Header {
      36             :     uint32_t Version;
      37             :     uint32_t NumColumns;
      38             :     uint32_t NumUnits;
      39             :     uint32_t NumBuckets = 0;
      40             : 
      41             :     bool parse(DataExtractor IndexData, uint32_t *OffsetPtr);
      42             :     void dump(raw_ostream &OS) const;
      43             :   };
      44             : 
      45             : public:
      46         536 :   class Entry {
      47             :   public:
      48             :     struct SectionContribution {
      49             :       uint32_t Offset;
      50             :       uint32_t Length;
      51             :     };
      52             : 
      53             :   private:
      54             :     const DWARFUnitIndex *Index;
      55             :     uint64_t Signature;
      56             :     std::unique_ptr<SectionContribution[]> Contributions;
      57             :     friend class DWARFUnitIndex;
      58             : 
      59             :   public:
      60             :     const SectionContribution *getOffset(DWARFSectionKind Sec) const;
      61             :     const SectionContribution *getOffset() const;
      62             : 
      63             :     const SectionContribution *getOffsets() const {
      64          48 :       return Contributions.get();
      65             :     }
      66             : 
      67             :     uint64_t getSignature() const { return Signature; }
      68             :   };
      69             : 
      70             : private:
      71             :   struct Header Header;
      72             : 
      73             :   DWARFSectionKind InfoColumnKind;
      74             :   int InfoColumn = -1;
      75             :   std::unique_ptr<DWARFSectionKind[]> ColumnKinds;
      76             :   std::unique_ptr<Entry[]> Rows;
      77             : 
      78             :   static StringRef getColumnHeader(DWARFSectionKind DS);
      79             : 
      80             :   bool parseImpl(DataExtractor IndexData);
      81             : 
      82             : public:
      83             :   DWARFUnitIndex(DWARFSectionKind InfoColumnKind)
      84        4068 :       : InfoColumnKind(InfoColumnKind) {}
      85             : 
      86             :   explicit operator bool() const { return Header.NumBuckets; }
      87             : 
      88             :   bool parse(DataExtractor IndexData);
      89             :   void dump(raw_ostream &OS) const;
      90             :   const Entry *getFromOffset(uint32_t Offset) const;
      91             :   const Entry *getFromHash(uint64_t Offset) const;
      92             : 
      93             :   ArrayRef<DWARFSectionKind> getColumnKinds() const {
      94          30 :     return makeArrayRef(ColumnKinds.get(), Header.NumColumns);
      95             :   }
      96             : 
      97             :   ArrayRef<Entry> getRows() const {
      98          27 :     return makeArrayRef(Rows.get(), Header.NumBuckets);
      99             :   }
     100             : };
     101             : 
     102             : } // end namespace llvm
     103             : 
     104             : #endif // LLVM_DEBUGINFO_DWARF_DWARFUNITINDEX_H

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