1 //===-- llvm/CodeGen/DwarfFile.h - Dwarf Debug Framework -------*- C++ -*--===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DWARFFILE_H
11 #define LLVM_LIB_CODEGEN_ASMPRINTER_DWARFFILE_H
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"
37 // Target of Dwarf emission, used for sizing of abbreviations.
42 // Used to uniquely define abbreviations.
43 FoldingSet<DIEAbbrev> AbbreviationsSet;
45 // A list of all the unique abbreviations in use.
46 std::vector<DIEAbbrev *> Abbreviations;
48 // A pointer to all units in the section.
49 SmallVector<std::unique_ptr<DwarfUnit>, 1> CUs;
51 DwarfStringPool StrPool;
53 // Collection of dbg variables of a scope.
54 DenseMap<LexicalScope *, SmallVector<DbgVariable *, 8>> ScopeVariables;
56 // Collection of abstract subprogram DIEs.
57 DenseMap<const MDNode *, DIE *> AbstractSPDies;
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;
65 DwarfFile(AsmPrinter *AP, DwarfDebug &DD, StringRef Pref,
66 BumpPtrAllocator &DA);
70 const SmallVectorImpl<std::unique_ptr<DwarfUnit>> &getUnits() { return CUs; }
72 /// \brief Compute the size and offset of a DIE given an incoming Offset.
73 unsigned computeSizeAndOffset(DIE &Die, unsigned Offset);
75 /// \brief Compute the size and offset of all the DIEs.
76 void computeSizeAndOffsets();
78 /// \brief Define a unique number for the abbreviation.
79 void assignAbbrevNumber(DIEAbbrev &Abbrev);
81 /// \brief Add a unit to the list of CUs.
82 void addUnit(std::unique_ptr<DwarfUnit> U);
84 /// \brief Emit all of the units to the section listed with the given
85 /// abbreviation section.
86 void emitUnits(const MCSymbol *ASectionSym);
88 /// \brief Emit a set of abbreviations to the specific section.
89 void emitAbbrevs(const MCSection *);
91 /// \brief Emit all of the strings to the section given.
92 void emitStrings(const MCSection *StrSection,
93 const MCSection *OffsetSection = nullptr);
95 /// \brief Returns the string pool.
96 DwarfStringPool &getStringPool() { return StrPool; }
98 void addScopeVariable(LexicalScope *LS, DbgVariable *Var);
100 DenseMap<LexicalScope *, SmallVector<DbgVariable *, 8>> &getScopeVariables() {
101 return ScopeVariables;
104 DenseMap<const MDNode *, DIE *> &getAbstractSPDies() {
105 return AbstractSPDies;
108 void insertDIE(const MDNode *TypeMD, DIE *Die) {
109 MDTypeNodeToDieMap.insert(std::make_pair(TypeMD, Die));
111 DIE *getDIE(const MDNode *TypeMD) {
112 return MDTypeNodeToDieMap.lookup(TypeMD);