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  1. //===- DWARFAttribute.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_DWARF_DWARFATTRIBUTE_H
  10. #define LLVM_DEBUGINFO_DWARF_DWARFATTRIBUTE_H
  11.  
  12. #include "llvm/BinaryFormat/Dwarf.h"
  13. #include "llvm/DebugInfo/DWARF/DWARFFormValue.h"
  14. #include <cstdint>
  15.  
  16. namespace llvm {
  17.  
  18. //===----------------------------------------------------------------------===//
  19. /// Encapsulates a DWARF attribute value and all of the data required to
  20. /// describe the attribute value.
  21. ///
  22. /// This class is designed to be used by clients that want to iterate across all
  23. /// attributes in a DWARFDie.
  24. struct DWARFAttribute {
  25.   /// The debug info/types offset for this attribute.
  26.   uint64_t Offset = 0;
  27.   /// The debug info/types section byte size of the data for this attribute.
  28.   uint32_t ByteSize = 0;
  29.   /// The attribute enumeration of this attribute.
  30.   dwarf::Attribute Attr = dwarf::Attribute(0);
  31.   /// The form and value for this attribute.
  32.   DWARFFormValue Value;
  33.  
  34.   bool isValid() const {
  35.     return Offset != 0 && Attr != dwarf::Attribute(0);
  36.   }
  37.  
  38.   explicit operator bool() const {
  39.     return isValid();
  40.   }
  41.  
  42.   /// Identify DWARF attributes that may contain a pointer to a location list.
  43.   static bool mayHaveLocationList(dwarf::Attribute Attr);
  44.  
  45.   /// Identifies DWARF attributes that may contain a reference to a
  46.   /// DWARF expression.
  47.   static bool mayHaveLocationExpr(dwarf::Attribute Attr);
  48. };
  49.  
  50. } // end namespace llvm
  51.  
  52. #endif // LLVM_DEBUGINFO_DWARF_DWARFATTRIBUTE_H
  53.