src/llvm/lib/CodeGen/AsmPrinter/DwarfFile.h

   1 //===-- llvm/CodeGen/DwarfFile.h - Dwarf Debug Framework -------*- 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_LIB_CODEGEN_ASMPRINTER_DWARFFILE_H
  11 #define LLVM_LIB_CODEGEN_ASMPRINTER_DWARFFILE_H
  12
  13 #include "AddressPool.h"
  14 #include "DwarfStringPool.h"
  15 #include "llvm/ADT/DenseMap.h"
  16 #include "llvm/ADT/FoldingSet.h"
  17 #include "llvm/ADT/SmallVector.h"
  18 #include "llvm/ADT/StringMap.h"
  19 #include "llvm/Support/Allocator.h"
  20 #include <memory>
  21 #include <string>
  22 #include <vector>
  23
  24 namespace llvm {
  25 class AsmPrinter;
  26 class DbgVariable;
  27 class DwarfUnit;
  28 class DIEAbbrev;
  29 class MCSymbol;
  30 class DIE;
  31 class DISubprogram;
  32 class LexicalScope;
  33 class StringRef;
  34 class DwarfDebug;
  35 class MCSection;
  36 class DwarfFile {
  37   // Target of Dwarf emission, used for sizing of abbreviations.
  38   AsmPrinter *Asm;
  39
  40   DwarfDebug &DD;
  41
  42   // Used to uniquely define abbreviations.
  43   FoldingSet<DIEAbbrev> AbbreviationsSet;
  44
  45   // A list of all the unique abbreviations in use.
  46   std::vector<DIEAbbrev *> Abbreviations;
  47
  48   // A pointer to all units in the section.
  49   SmallVector<std::unique_ptr<DwarfUnit>, 1> CUs;
  50
  51   DwarfStringPool StrPool;
  52
  53   // Collection of dbg variables of a scope.
  54   DenseMap<LexicalScope *, SmallVector<DbgVariable *, 8>> ScopeVariables;
  55
  56   // Collection of abstract subprogram DIEs.
  57   DenseMap<const MDNode *, DIE *> AbstractSPDies;
  58
  59   /// Maps MDNodes for type system with the corresponding DIEs. These DIEs can
  60   /// be shared across CUs, that is why we keep the map here instead
  61   /// of in DwarfCompileUnit.
  62   DenseMap<const MDNode *, DIE *> MDTypeNodeToDieMap;
  63
  64 public:
  65   DwarfFile(AsmPrinter *AP, DwarfDebug &DD, StringRef Pref,
  66             BumpPtrAllocator &DA);
  67
  68   ~DwarfFile();
  69
  70   const SmallVectorImpl<std::unique_ptr<DwarfUnit>> &getUnits() { return CUs; }
  71
  72   /// \brief Compute the size and offset of a DIE given an incoming Offset.
  73   unsigned computeSizeAndOffset(DIE &Die, unsigned Offset);
  74
  75   /// \brief Compute the size and offset of all the DIEs.
  76   void computeSizeAndOffsets();
  77
  78   /// \brief Define a unique number for the abbreviation.
  79   void assignAbbrevNumber(DIEAbbrev &Abbrev);
  80
  81   /// \brief Add a unit to the list of CUs.
  82   void addUnit(std::unique_ptr<DwarfUnit> U);
  83
  84   /// \brief Emit all of the units to the section listed with the given
  85   /// abbreviation section.
  86   void emitUnits(const MCSymbol *ASectionSym);
  87
  88   /// \brief Emit a set of abbreviations to the specific section.
  89   void emitAbbrevs(const MCSection *);
  90
  91   /// \brief Emit all of the strings to the section given.
  92   void emitStrings(const MCSection *StrSection,
  93                    const MCSection *OffsetSection = nullptr);
  94
  95   /// \brief Returns the string pool.
  96   DwarfStringPool &getStringPool() { return StrPool; }
  97
  98   void addScopeVariable(LexicalScope *LS, DbgVariable *Var);
  99
 100   DenseMap<LexicalScope *, SmallVector<DbgVariable *, 8>> &getScopeVariables() {
 101     return ScopeVariables;
 102   }
 103
 104   DenseMap<const MDNode *, DIE *> &getAbstractSPDies() {
 105     return AbstractSPDies;
 106   }
 107
 108   void insertDIE(const MDNode *TypeMD, DIE *Die) {
 109     MDTypeNodeToDieMap.insert(std::make_pair(TypeMD, Die));
 110   }
 111   DIE *getDIE(const MDNode *TypeMD) {
 112     return MDTypeNodeToDieMap.lookup(TypeMD);
 113   }
 114 };
 115 }
 116 #endif