diff options
Diffstat (limited to 'lib/CodeGen/AsmPrinter/DwarfDebug.h')
| -rw-r--r-- | lib/CodeGen/AsmPrinter/DwarfDebug.h | 118 |
1 files changed, 85 insertions, 33 deletions
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.h b/lib/CodeGen/AsmPrinter/DwarfDebug.h index e14f9b1..cebac39 100644 --- a/lib/CodeGen/AsmPrinter/DwarfDebug.h +++ b/lib/CodeGen/AsmPrinter/DwarfDebug.h @@ -150,11 +150,12 @@ class DbgVariable { DbgVariable *AbsVar; // Corresponding Abstract variable, if any. const MachineInstr *MInsn; // DBG_VALUE instruction of the variable. int FrameIndex; + DwarfDebug *DD; public: // AbsVar may be NULL. - DbgVariable(DIVariable V, DbgVariable *AV) + DbgVariable(DIVariable V, DbgVariable *AV, DwarfDebug *DD) : Var(V), TheDIE(0), DotDebugLocOffset(~0U), AbsVar(AV), MInsn(0), - FrameIndex(~0) {} + FrameIndex(~0), DD(DD) {} // Accessors. DIVariable getVariable() const { return Var; } @@ -169,7 +170,7 @@ public: int getFrameIndex() const { return FrameIndex; } void setFrameIndex(int FI) { FrameIndex = FI; } // Translate tag to proper Dwarf tag. - unsigned getTag() const { + uint16_t getTag() const { if (Var.getTag() == dwarf::DW_TAG_arg_variable) return dwarf::DW_TAG_formal_parameter; @@ -208,6 +209,11 @@ public: return Var.getAddrElement(i); } DIType getType() const; + +private: + /// resolve - Look in the DwarfDebug map for the MDNode that + /// corresponds to the reference. + template <typename T> T resolve(DIRef<T> Ref) const; }; /// \brief Collects and handles information specific to a particular @@ -220,7 +226,7 @@ class DwarfUnits { FoldingSet<DIEAbbrev> *AbbreviationsSet; // A list of all the unique abbreviations in use. - std::vector<DIEAbbrev *> *Abbreviations; + std::vector<DIEAbbrev *> &Abbreviations; // A pointer to all units in the section. SmallVector<CompileUnit *, 1> CUs; @@ -243,7 +249,7 @@ class DwarfUnits { public: DwarfUnits(AsmPrinter *AP, FoldingSet<DIEAbbrev> *AS, - std::vector<DIEAbbrev *> *A, const char *Pref, + std::vector<DIEAbbrev *> &A, const char *Pref, BumpPtrAllocator &DA) : Asm(AP), AbbreviationsSet(AS), Abbreviations(A), StringPool(DA), NextStringPoolNumber(0), StringPref(Pref), AddressPool(), @@ -294,10 +300,13 @@ public: /// \brief Returns the address pool. AddrPool *getAddrPool() { return &AddressPool; } +}; - /// \brief for a given compile unit DIE, returns offset from beginning of - /// debug info. - unsigned getCUOffset(DIE *Die); +/// \brief Helper used to pair up a symbol and its DWARF compile unit. +struct SymbolCU { + SymbolCU(CompileUnit *CU, const MCSymbol *Sym) : Sym(Sym), CU(CU) {} + const MCSymbol *Sym; + CompileUnit *CU; }; /// \brief Collects and handles dwarf debug information. @@ -320,6 +329,14 @@ class DwarfDebug { // Maps subprogram MDNode with its corresponding CompileUnit. DenseMap <const MDNode *, CompileUnit *> SPMap; + // Maps a CU DIE with its corresponding CompileUnit. + DenseMap <const DIE *, CompileUnit *> CUDieMap; + + /// Maps MDNodes for type sysstem with the corresponding DIEs. These DIEs can + /// be shared across CUs, that is why we keep the map here instead + /// of in CompileUnit. + DenseMap<const MDNode *, DIE *> MDTypeNodeToDieMap; + // Used to uniquely define abbreviations. FoldingSet<DIEAbbrev> AbbreviationsSet; @@ -332,8 +349,15 @@ class DwarfDebug { // separated by a zero byte, mapped to a unique id. StringMap<unsigned, BumpPtrAllocator&> SourceIdMap; + // List of all labels used in aranges generation. + std::vector<SymbolCU> ArangeLabels; + + // Size of each symbol emitted (for those symbols that have a specific size). + DenseMap <const MCSymbol *, uint64_t> SymSize; + // Provides a unique id per text section. - SetVector<const MCSection*> SectionMap; + typedef DenseMap<const MCSection *, SmallVector<SymbolCU, 8> > SectionMapType; + SectionMapType SectionMap; // List of arguments for current function. SmallVector<DbgVariable *, 8> CurrentFnArguments; @@ -358,14 +382,6 @@ class DwarfDebug { // as DW_AT_inline. SmallPtrSet<DIE *, 4> InlinedSubprogramDIEs; - // Keep track of inlined functions and their location. This - // information is used to populate the debug_inlined section. - typedef std::pair<const MCSymbol *, DIE *> InlineInfoLabels; - typedef DenseMap<const MDNode *, - SmallVector<InlineInfoLabels, 4> > InlineInfoMap; - InlineInfoMap InlineInfo; - SmallVector<const MDNode *, 4> InlinedSPNodes; - // This is a collection of subprogram MDNodes that are processed to // create DIEs. SmallPtrSet<const MDNode *, 16> ProcessedSPNodes; @@ -406,6 +422,7 @@ class DwarfDebug { MCSymbol *DwarfDebugLocSectionSym, *DwarfLineSectionSym, *DwarfAddrSectionSym; MCSymbol *FunctionBeginSym, *FunctionEndSym; MCSymbol *DwarfAbbrevDWOSectionSym, *DwarfStrDWOSectionSym; + MCSymbol *DwarfGnuPubNamesSectionSym, *DwarfGnuPubTypesSectionSym; // As an optimization, there is no need to emit an entry in the directory // table for the same directory as DW_AT_comp_dir. @@ -420,9 +437,6 @@ class DwarfDebug { // Holders for the various debug information flags that we might need to // have exposed. See accessor functions below for description. - // Whether or not we're emitting info for older versions of gdb on darwin. - bool IsDarwinGDBCompat; - // Holder for imported entities. typedef SmallVector<std::pair<const MDNode *, const MDNode *>, 32> ImportedEntityMap; @@ -431,12 +445,16 @@ class DwarfDebug { // Holder for types that are going to be extracted out into a type unit. std::vector<DIE *> TypeUnits; + // Whether to emit the pubnames/pubtypes sections. + bool HasDwarfPubSections; + + // Version of dwarf we're emitting. + unsigned DwarfVersion; + // DWARF5 Experimental Options bool HasDwarfAccelTables; bool HasSplitDwarf; - unsigned DwarfVersion; - // Separated Dwarf Variables // In general these will all be for bits that are left in the // original object file, rather than things that are meant @@ -454,6 +472,9 @@ class DwarfDebug { // Holder for the skeleton information. DwarfUnits SkeletonHolder; + // Maps from a type identifier to the actual MDNode. + DITypeIdentifierMap TypeIdentifierMap; + private: void addScopeVariable(LexicalScope *LS, DbgVariable *Var); @@ -465,11 +486,14 @@ private: /// DW_AT_low_pc and DW_AT_high_pc attributes. If there are global /// variables in this scope then create and insert DIEs for these /// variables. - DIE *updateSubprogramScopeDIE(CompileUnit *SPCU, const MDNode *SPNode); + DIE *updateSubprogramScopeDIE(CompileUnit *SPCU, DISubprogram SP); /// \brief Construct new DW_TAG_lexical_block for this scope and /// attach DW_AT_low_pc/DW_AT_high_pc labels. DIE *constructLexicalScopeDIE(CompileUnit *TheCU, LexicalScope *Scope); + /// A helper function to check whether the DIE for a given Scope is going + /// to be null. + bool isLexicalScopeDIENull(LexicalScope *Scope); /// \brief This scope represents inlined body of a function. Construct /// DIE to represent this concrete inlined copy of the function. @@ -477,6 +501,9 @@ private: /// \brief Construct a DIE for this scope. DIE *constructScopeDIE(CompileUnit *TheCU, LexicalScope *Scope); + /// A helper function to create children of a Scope DIE. + DIE *createScopeChildrenDIE(CompileUnit *TheCU, LexicalScope *Scope, + SmallVectorImpl<DIE*> &Children); /// \brief Emit initial Dwarf sections with a label at the start of each one. void emitSectionLabels(); @@ -528,10 +555,16 @@ private: void emitAccelTypes(); /// \brief Emit visible names into a debug pubnames section. - void emitDebugPubnames(); + /// \param GnuStyle determines whether or not we want to emit + /// additional information into the table ala newer gcc for gdb + /// index. + void emitDebugPubNames(bool GnuStyle = false); /// \brief Emit visible types into a debug pubtypes section. - void emitDebugPubTypes(); + /// \param GnuStyle determines whether or not we want to emit + /// additional information into the table ala newer gcc for gdb + /// index. + void emitDebugPubTypes(bool GnuStyle = false); /// \brief Emit visible names into a debug str section. void emitDebugStr(); @@ -555,7 +588,7 @@ private: /// \brief Construct the split debug info compile unit for the debug info /// section. - CompileUnit *constructSkeletonCU(const MDNode *); + CompileUnit *constructSkeletonCU(const CompileUnit *CU); /// \brief Emit the local split abbreviations. void emitSkeletonAbbrevs(const MCSection *); @@ -571,7 +604,7 @@ private: /// \brief Create new CompileUnit for the given metadata node with tag /// DW_TAG_compile_unit. - CompileUnit *constructCompileUnit(const MDNode *N); + CompileUnit *constructCompileUnit(DICompileUnit DIUnit); /// \brief Construct subprogram DIE. void constructSubprogramDIE(CompileUnit *TheCU, const MDNode *N); @@ -633,7 +666,13 @@ public: // Main entry points. // DwarfDebug(AsmPrinter *A, Module *M); - ~DwarfDebug(); + + void insertDIE(const MDNode *TypeMD, DIE *Die) { + MDTypeNodeToDieMap.insert(std::make_pair(TypeMD, Die)); + } + DIE *getDIE(const MDNode *TypeMD) { + return MDTypeNodeToDieMap.lookup(TypeMD); + } /// \brief Emit all Dwarf sections that should come prior to the /// content. @@ -658,6 +697,13 @@ public: /// type units. void addTypeUnitType(DIE *Die) { TypeUnits.push_back(Die); } + /// \brief Add a label so that arange data can be generated for it. + void addArangeLabel(SymbolCU SCU) { ArangeLabels.push_back(SCU); } + + /// \brief For symbols that have a size designated (e.g. common symbols), + /// this tracks that size. + void setSymbolSize(const MCSymbol *Sym, uint64_t Size) { SymSize[Sym] = Size;} + /// \brief Look up the source id with the given directory and source file /// names. If none currently exists, create a new id and insert it in the /// SourceIds map. @@ -665,11 +711,7 @@ public: unsigned CUID); /// \brief Recursively Emits a debug information entry. - void emitDIE(DIE *Die, std::vector<DIEAbbrev *> *Abbrevs); - - /// \brief Returns whether or not to limit some of our debug - /// output to the limitations of darwin gdb. - bool useDarwinGDBCompat() { return IsDarwinGDBCompat; } + void emitDIE(DIE *Die, ArrayRef<DIEAbbrev *> Abbrevs); // Experimental DWARF5 features. @@ -683,6 +725,16 @@ public: /// Returns the Dwarf Version. unsigned getDwarfVersion() const { return DwarfVersion; } + + /// Find the MDNode for the given reference. + template <typename T> T resolve(DIRef<T> Ref) const { + return Ref.resolve(TypeIdentifierMap); + } + + /// isSubprogramContext - Return true if Context is either a subprogram + /// or another context nested inside a subprogram. + bool isSubprogramContext(const MDNode *Context); + }; } // End of namespace llvm |