X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FMC%2FMCContext.h;h=5a8830cb66ce12c1c31648701b8cc080c720ee9a;hb=43e1d7aded7bf8486f5b810b6dc85652f99f6ba0;hp=86f83ad240f8d2c12aee0ad105380e2504709a07;hpb=7cbf73a73f296167b6e978dbd919ed249e88eeb5;p=oota-llvm.git diff --git a/include/llvm/MC/MCContext.h b/include/llvm/MC/MCContext.h index 86f83ad240f..5a8830cb66c 100644 --- a/include/llvm/MC/MCContext.h +++ b/include/llvm/MC/MCContext.h @@ -11,9 +11,11 @@ #define LLVM_MC_MCCONTEXT_H #include "llvm/MC/SectionKind.h" +#include "llvm/MC/MCDwarf.h" #include "llvm/ADT/DenseMap.h" #include "llvm/ADT/StringMap.h" #include "llvm/Support/Allocator.h" +#include "llvm/Support/Compiler.h" #include "llvm/Support/raw_ostream.h" #include // FIXME: Shouldn't be needed. @@ -24,25 +26,49 @@ namespace llvm { class MCSymbol; class MCLabel; class MCDwarfFile; + class MCDwarfLoc; + class MCObjectFileInfo; + class MCRegisterInfo; + class MCLineSection; + class SMLoc; class StringRef; class Twine; class MCSectionMachO; + class MCSectionELF; /// MCContext - Context object for machine code objects. This class owns all /// of the sections that it creates. /// class MCContext { - MCContext(const MCContext&); // DO NOT IMPLEMENT - MCContext &operator=(const MCContext&); // DO NOT IMPLEMENT + MCContext(const MCContext&) LLVM_DELETED_FUNCTION; + MCContext &operator=(const MCContext&) LLVM_DELETED_FUNCTION; + public: + typedef StringMap SymbolTable; + private: + /// The SourceMgr for this object, if any. + const SourceMgr *SrcMgr; /// The MCAsmInfo for this target. const MCAsmInfo &MAI; - - /// Sections - Bindings of names to allocated sections. - StringMap Sections; + + /// The MCRegisterInfo for this target. + const MCRegisterInfo &MRI; + + /// The MCObjectFileInfo for this target. + const MCObjectFileInfo *MOFI; + + /// Allocator - Allocator object used for creating machine code objects. + /// + /// We use a bump pointer allocator to avoid the need to track all allocated + /// objects. + BumpPtrAllocator Allocator; /// Symbols - Bindings of names to symbols. - StringMap Symbols; + SymbolTable Symbols; + + /// UsedNames - Keeps tracks of names that were used both for used declared + /// and artificial symbols. + StringMap UsedNames; /// NextUniqueID - The next ID to dole out to an unnamed assembler temporary /// symbol. @@ -56,8 +82,8 @@ namespace llvm { /// GetInstance() gets the current instance of the directional local label /// for the LocalLabelVal and adds it to the map if needed. unsigned GetInstance(int64_t LocalLabelVal); - - /// The file name of the log file from the enviromment variable + + /// The file name of the log file from the environment variable /// AS_SECURE_LOG_FILE. Which must be set before the .secure_log_unique /// directive is used or it is an error. char *SecureLogFile; @@ -70,30 +96,77 @@ namespace llvm { /// The dwarf file and directory tables from the dwarf .file directive. std::vector MCDwarfFiles; - std::vector MCDwarfDirs; + std::vector MCDwarfDirs; + + /// The current dwarf line information from the last dwarf .loc directive. + MCDwarfLoc CurrentDwarfLoc; + bool DwarfLocSeen; + + /// Generate dwarf debugging info for assembly source files. + bool GenDwarfForAssembly; + + /// The current dwarf file number when generate dwarf debugging info for + /// assembly source files. + unsigned GenDwarfFileNumber; + + /// The default initial text section that we generate dwarf debugging line + /// info for when generating dwarf assembly source files. + const MCSection *GenDwarfSection; + /// Symbols created for the start and end of this section. + MCSymbol *GenDwarfSectionStartSym, *GenDwarfSectionEndSym; + + /// The information gathered from labels that will have dwarf label + /// entries when generating dwarf assembly source files. + std::vector MCGenDwarfLabelEntries; + + /// The string to embed in the debug information for the compile unit, if + /// non-empty. + StringRef DwarfDebugFlags; + + /// Honor temporary labels, this is useful for debugging semantic + /// differences between temporary and non-temporary labels (primarily on + /// Darwin). + bool AllowTemporaryLabels; + + /// The dwarf line information from the .loc directives for the sections + /// with assembled machine instructions have after seeing .loc directives. + DenseMap MCLineSections; + /// We need a deterministic iteration order, so we remember the order + /// the elements were added. + std::vector MCLineSectionOrder; - /// Allocator - Allocator object used for creating machine code objects. - /// - /// We use a bump pointer allocator to avoid the need to track all allocated - /// objects. - BumpPtrAllocator Allocator; - void *MachOUniquingMap, *ELFUniquingMap, *COFFUniquingMap; + + MCSymbol *CreateSymbol(StringRef Name); + public: - explicit MCContext(const MCAsmInfo &MAI); + explicit MCContext(const MCAsmInfo &MAI, const MCRegisterInfo &MRI, + const MCObjectFileInfo *MOFI, const SourceMgr *Mgr = 0); ~MCContext(); - + + const SourceMgr *getSourceManager() const { return SrcMgr; } + const MCAsmInfo &getAsmInfo() const { return MAI; } - /// @name Symbol Managment + const MCRegisterInfo &getRegisterInfo() const { return MRI; } + + const MCObjectFileInfo *getObjectFileInfo() const { return MOFI; } + + void setAllowTemporaryLabels(bool Value) { AllowTemporaryLabels = Value; } + + /// @name Symbol Management /// @{ - + /// CreateTempSymbol - Create and return a new assembler temporary symbol /// with a unique but unspecified name. MCSymbol *CreateTempSymbol(); - /// CreateDirectionalLocalSymbol - Create the defintion of a directional - /// local symbol for numbered label (used for "1:" defintions). + /// getUniqueSymbolID() - Return a unique identifier for use in constructing + /// symbol names. + unsigned getUniqueSymbolID() { return NextUniqueID++; } + + /// CreateDirectionalLocalSymbol - Create the definition of a directional + /// local symbol for numbered label (used for "1:" definitions). MCSymbol *CreateDirectionalLocalSymbol(int64_t LocalLabelVal); /// GetDirectionalLocalSymbol - Create and return a directional local @@ -110,10 +183,19 @@ namespace llvm { /// LookupSymbol - Get the symbol for \p Name, or null. MCSymbol *LookupSymbol(StringRef Name) const; + MCSymbol *LookupSymbol(const Twine &Name) const; + + /// getSymbols - Get a reference for the symbol table for clients that + /// want to, for example, iterate over all symbols. 'const' because we + /// still want any modifications to the table itself to use the MCContext + /// APIs. + const SymbolTable &getSymbols() const { + return Symbols; + } /// @} - - /// @name Section Managment + + /// @name Section Management /// @{ /// getMachOSection - Return the MCSection for the specified mach-o section. @@ -129,10 +211,15 @@ namespace llvm { SectionKind K) { return getMachOSection(Segment, Section, TypeAndAttributes, 0, K); } - - const MCSection *getELFSection(StringRef Section, unsigned Type, - unsigned Flags, SectionKind Kind, - bool IsExplicit = false); + + const MCSectionELF *getELFSection(StringRef Section, unsigned Type, + unsigned Flags, SectionKind Kind); + + const MCSectionELF *getELFSection(StringRef Section, unsigned Type, + unsigned Flags, SectionKind Kind, + unsigned EntrySize, StringRef Group); + + const MCSectionELF *CreateELFGroupSection(); const MCSection *getCOFFSection(StringRef Section, unsigned Characteristics, int Selection, SectionKind Kind); @@ -142,18 +229,85 @@ namespace llvm { return getCOFFSection (Section, Characteristics, 0, Kind); } - + /// @} - /// @name Dwarf Managment + /// @name Dwarf Management /// @{ /// GetDwarfFile - creates an entry in the dwarf file and directory tables. - unsigned GetDwarfFile(StringRef FileName, unsigned FileNumber); + unsigned GetDwarfFile(StringRef Directory, StringRef FileName, + unsigned FileNumber); + + bool isValidDwarfFileNumber(unsigned FileNumber); + + bool hasDwarfFiles() const { + return !MCDwarfFiles.empty(); + } const std::vector &getMCDwarfFiles() { return MCDwarfFiles; } + const std::vector &getMCDwarfDirs() { + return MCDwarfDirs; + } + + const DenseMap + &getMCLineSections() const { + return MCLineSections; + } + const std::vector &getMCLineSectionOrder() const { + return MCLineSectionOrder; + } + void addMCLineSection(const MCSection *Sec, MCLineSection *Line) { + MCLineSections[Sec] = Line; + MCLineSectionOrder.push_back(Sec); + } + + /// setCurrentDwarfLoc - saves the information from the currently parsed + /// dwarf .loc directive and sets DwarfLocSeen. When the next instruction + /// is assembled an entry in the line number table with this information and + /// the address of the instruction will be created. + void setCurrentDwarfLoc(unsigned FileNum, unsigned Line, unsigned Column, + unsigned Flags, unsigned Isa, + unsigned Discriminator) { + CurrentDwarfLoc.setFileNum(FileNum); + CurrentDwarfLoc.setLine(Line); + CurrentDwarfLoc.setColumn(Column); + CurrentDwarfLoc.setFlags(Flags); + CurrentDwarfLoc.setIsa(Isa); + CurrentDwarfLoc.setDiscriminator(Discriminator); + DwarfLocSeen = true; + } + void ClearDwarfLocSeen() { DwarfLocSeen = false; } + + bool getDwarfLocSeen() { return DwarfLocSeen; } + const MCDwarfLoc &getCurrentDwarfLoc() { return CurrentDwarfLoc; } + + bool getGenDwarfForAssembly() { return GenDwarfForAssembly; } + void setGenDwarfForAssembly(bool Value) { GenDwarfForAssembly = Value; } + unsigned getGenDwarfFileNumber() { return GenDwarfFileNumber; } + unsigned nextGenDwarfFileNumber() { return ++GenDwarfFileNumber; } + const MCSection *getGenDwarfSection() { return GenDwarfSection; } + void setGenDwarfSection(const MCSection *Sec) { GenDwarfSection = Sec; } + MCSymbol *getGenDwarfSectionStartSym() { return GenDwarfSectionStartSym; } + void setGenDwarfSectionStartSym(MCSymbol *Sym) { + GenDwarfSectionStartSym = Sym; + } + MCSymbol *getGenDwarfSectionEndSym() { return GenDwarfSectionEndSym; } + void setGenDwarfSectionEndSym(MCSymbol *Sym) { + GenDwarfSectionEndSym = Sym; + } + const std::vector + &getMCGenDwarfLabelEntries() const { + return MCGenDwarfLabelEntries; + } + void addMCGenDwarfLabelEntry(const MCGenDwarfLabelEntry *E) { + MCGenDwarfLabelEntries.push_back(E); + } + + void setDwarfDebugFlags(StringRef S) { DwarfDebugFlags = S; } + StringRef getDwarfDebugFlags() { return DwarfDebugFlags; } /// @} @@ -172,6 +326,11 @@ namespace llvm { } void Deallocate(void *Ptr) { } + + // Unrecoverable error has occured. Display the best diagnostic we can + // and bail via exit(1). For now, most MC backend errors are unrecoverable. + // FIXME: We should really do something about that. + LLVM_ATTRIBUTE_NORETURN void FatalError(SMLoc L, const Twine &Msg); }; } // end namespace llvm