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      1 //===- DWARFDebugMacro.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_DWARFDEBUGMACRO_H
     11 #define LLVM_DEBUGINFO_DWARF_DWARFDEBUGMACRO_H
     12 
     13 #include "llvm/ADT/SmallVector.h"
     14 #include "llvm/Support/DataExtractor.h"
     15 #include <cstdint>
     16 
     17 namespace llvm {
     18 
     19 class raw_ostream;
     20 
     21 class DWARFDebugMacro {
     22   /// A single macro entry within a macro list.
     23   struct Entry {
     24     /// The type of the macro entry.
     25     uint32_t Type;
     26     union {
     27       /// The source line where the macro is defined.
     28       uint64_t Line;
     29       /// Vendor extension constant value.
     30       uint64_t ExtConstant;
     31     };
     32 
     33     union {
     34       /// The string (name, value) of the macro entry.
     35       const char *MacroStr;
     36       // An unsigned integer indicating the identity of the source file.
     37       uint64_t File;
     38       /// Vendor extension string.
     39       const char *ExtStr;
     40     };
     41   };
     42 
     43   typedef SmallVector<Entry, 4> MacroList;
     44 
     45   /// A list of all the macro entries in the debug_macinfo section.
     46   MacroList Macros;
     47 
     48 public:
     49   DWARFDebugMacro() = default;
     50 
     51   /// Print the macro list found within the debug_macinfo section.
     52   void dump(raw_ostream &OS) const;
     53 
     54   /// Parse the debug_macinfo section accessible via the 'data' parameter.
     55   void parse(DataExtractor data);
     56 };
     57 
     58 } // end namespace llvm
     59 
     60 #endif // LLVM_DEBUGINFO_DWARF_DWARFDEBUGMACRO_H
     61