X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FMC%2FMCContext.h;h=111ad484ffb5cfbf20320fa536a0c7427fc41c7c;hb=f43e3fdb4ffddff6f71b5597c813c43e1e206564;hp=a57b5bf745d36b4258eb58a2ef176b94166ad3e0;hpb=f187ac5a23213f85c3c1f0f80b3592295ee6441d;p=oota-llvm.git diff --git a/include/llvm/MC/MCContext.h b/include/llvm/MC/MCContext.h index a57b5bf745d..111ad484ffb 100644 --- a/include/llvm/MC/MCContext.h +++ b/include/llvm/MC/MCContext.h @@ -10,11 +10,14 @@ #ifndef LLVM_MC_MCCONTEXT_H #define LLVM_MC_MCCONTEXT_H -#include "llvm/MC/SectionKind.h" #include "llvm/ADT/DenseMap.h" #include "llvm/ADT/StringMap.h" +#include "llvm/MC/MCDwarf.h" +#include "llvm/MC/SectionKind.h" #include "llvm/Support/Allocator.h" +#include "llvm/Support/Compiler.h" #include "llvm/Support/raw_ostream.h" +#include // FIXME: Shouldn't be needed. namespace llvm { class MCAsmInfo; @@ -22,25 +25,50 @@ namespace llvm { class MCSection; 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. @@ -54,8 +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; @@ -66,28 +94,95 @@ namespace llvm { /// .secure_log_reset appearing between them. bool SecureLogUsed; - /// 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; - + /// The dwarf file and directory tables from the dwarf .file directive. + std::vector MCDwarfFiles; + 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; + void *MachOUniquingMap, *ELFUniquingMap, *COFFUniquingMap; + + /// Do automatic initialization in constructor and finalization in + /// destructor + bool AutoInitializationFinalization; + + 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, + bool AutoInitializationFinalization = true); ~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 Module Lifetime Management /// @{ - + + /// doInitialization - prepare to process a new module + void doInitialization(); + + /// doFinalization - clean up state from the current module + void doFinalization(); + + /// @} + + /// @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 @@ -104,10 +199,19 @@ 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. @@ -123,10 +227,15 @@ 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); @@ -136,7 +245,86 @@ namespace llvm { return getCOFFSection (Section, Characteristics, 0, Kind); } - + + /// @} + + /// @name Dwarf Management + /// @{ + + /// GetDwarfFile - creates an entry in the dwarf file and directory tables. + 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; } + /// @} char *getSecureLogFile() { return SecureLogFile; } @@ -154,6 +342,11 @@ 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