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       1             : //===- DWARFDebugInfoEntry.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_DWARFDEBUGINFOENTRY_H
      11             : #define LLVM_DEBUGINFO_DWARFDEBUGINFOENTRY_H
      12             : 
      13             : #include "llvm/BinaryFormat/Dwarf.h"
      14             : #include "llvm/DebugInfo/DWARF/DWARFAbbreviationDeclaration.h"
      15             : #include "llvm/DebugInfo/DWARF/DWARFDataExtractor.h"
      16             : #include <cstdint>
      17             : 
      18             : namespace llvm {
      19             : 
      20             : class DataExtractor;
      21             : class DWARFUnit;
      22             : 
      23             : /// DWARFDebugInfoEntry - A DIE with only the minimum required data.
      24             : class DWARFDebugInfoEntry {
      25             :   /// Offset within the .debug_info of the start of this entry.
      26             :   uint32_t Offset = 0;
      27             : 
      28             :   /// The integer depth of this DIE within the compile unit DIEs where the
      29             :   /// compile/type unit DIE has a depth of zero.
      30             :   uint32_t Depth = 0;
      31             : 
      32             :   const DWARFAbbreviationDeclaration *AbbrevDecl = nullptr;
      33             : 
      34             : public:
      35             :   DWARFDebugInfoEntry() = default;
      36             : 
      37             :   /// Extracts a debug info entry, which is a child of a given unit,
      38             :   /// starting at a given offset. If DIE can't be extracted, returns false and
      39             :   /// doesn't change OffsetPtr.
      40             :   bool extractFast(const DWARFUnit &U, uint32_t *OffsetPtr);
      41             : 
      42             :   /// High performance extraction should use this call.
      43             :   bool extractFast(const DWARFUnit &U, uint32_t *OffsetPtr,
      44             :                    const DWARFDataExtractor &DebugInfoData, uint32_t UEndOffset,
      45             :                    uint32_t Depth);
      46             : 
      47           0 :   uint32_t getOffset() const { return Offset; }
      48           0 :   uint32_t getDepth() const { return Depth; }
      49             : 
      50           0 :   dwarf::Tag getTag() const {
      51        9723 :     return AbbrevDecl ? AbbrevDecl->getTag() : dwarf::DW_TAG_null;
      52             :   }
      53             : 
      54       42163 :   bool hasChildren() const { return AbbrevDecl && AbbrevDecl->hasChildren(); }
      55             : 
      56           0 :   const DWARFAbbreviationDeclaration *getAbbreviationDeclarationPtr() const {
      57           0 :     return AbbrevDecl;
      58             :   }
      59             : };
      60             : 
      61             : } // end namespace llvm
      62             : 
      63             : #endif // LLVM_DEBUGINFO_DWARFDEBUGINFOENTRY_H