#define LLVM_MC_MCCONTEXT_H
#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/SmallVector.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 <map>
+#include <vector> // FIXME: Shouldn't be needed.
namespace llvm {
- class MCValue;
+ class MCAsmInfo;
+ class MCExpr;
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;
+ class MCSectionCOFF;
/// 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<MCSymbol*, BumpPtrAllocator&> SymbolTable;
+ private:
+ /// The SourceMgr for this object, if any.
+ const SourceMgr *SrcMgr;
- /// Sections - Bindings of names to allocated sections.
- StringMap<MCSection*> Sections;
+ /// The MCAsmInfo for this target.
+ const MCAsmInfo *MAI;
- /// Symbols - Bindings of names to symbols.
- StringMap<MCSymbol*> Symbols;
+ /// The MCRegisterInfo for this target.
+ const MCRegisterInfo *MRI;
- /// SymbolValues - Bindings of symbols to values.
- //
- // FIXME: Is there a good reason to not just put this in the MCSymbol?
- DenseMap<MCSymbol*, MCValue> SymbolValues;
+ /// 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.
+ SymbolTable Symbols;
+
+ /// UsedNames - Keeps tracks of names that were used both for used declared
+ /// and artificial symbols.
+ StringMap<bool, BumpPtrAllocator&> UsedNames;
+
+ /// NextUniqueID - The next ID to dole out to an unnamed assembler temporary
+ /// symbol.
+ unsigned NextUniqueID;
+
+ /// Instances of directional local labels.
+ DenseMap<unsigned, MCLabel *> Instances;
+ /// NextInstance() creates the next instance of the directional local label
+ /// for the LocalLabelVal and adds it to the map if needed.
+ unsigned NextInstance(int64_t LocalLabelVal);
+ /// 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 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;
+ /// The stream that gets written to for the .secure_log_unique directive.
+ raw_ostream *SecureLog;
+ /// Boolean toggled when .secure_log_unique / .secure_log_reset is seen to
+ /// catch errors if .secure_log_unique appears twice without
+ /// .secure_log_reset appearing between them.
+ bool SecureLogUsed;
+
+ /// The compilation directory to use for DW_AT_comp_dir.
+ SmallString<128> CompilationDir;
+
+ /// The main file name if passed in explicitly.
+ std::string MainFileName;
+
+ /// The dwarf file and directory tables from the dwarf .file directive.
+ /// We now emit a line table for each compile unit. To reduce the prologue
+ /// size of each line table, the files and directories used by each compile
+ /// unit are separated.
+ std::map<unsigned, MCDwarfFileTable> MCDwarfFileTablesCUMap;
+
+ /// 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<const MCGenDwarfLabelEntry *> MCGenDwarfLabelEntries;
+
+ /// The string to embed in the debug information for the compile unit, if
+ /// non-empty.
+ StringRef DwarfDebugFlags;
+
+ /// The string to embed in as the dwarf AT_producer for the compile unit, if
+ /// non-empty.
+ StringRef DwarfDebugProducer;
+
+ /// Honor temporary labels, this is useful for debugging semantic
+ /// differences between temporary and non-temporary labels (primarily on
+ /// Darwin).
+ bool AllowTemporaryLabels;
+
+ /// The Compile Unit ID that we are currently processing.
+ unsigned DwarfCompileUnitID;
+
+ void *MachOUniquingMap, *ELFUniquingMap, *COFFUniquingMap;
+
+ /// Do automatic reset in destructor
+ bool AutoReset;
+
+ MCSymbol *CreateSymbol(StringRef Name);
+
public:
- MCContext();
+ explicit MCContext(const MCAsmInfo *MAI, const MCRegisterInfo *MRI,
+ const MCObjectFileInfo *MOFI, const SourceMgr *Mgr = 0,
+ bool DoAutoReset = true);
~MCContext();
- /// GetSection - Look up a section with the given @param Name, returning
- /// null if it doesn't exist.
- MCSection *GetSection(const StringRef &Name) const;
-
- void SetSection(const StringRef &Name, MCSection *S) {
- MCSection *&Entry = Sections[Name];
- assert(Entry == 0 && "Multiple sections with the same name created");
- Entry = S;
- }
-
- /// CreateSymbol - Create a new symbol with the specified @param Name.
- ///
- /// @param Name - The symbol name, which must be unique across all symbols.
- MCSymbol *CreateSymbol(const StringRef &Name);
+ const SourceMgr *getSourceManager() const { return SrcMgr; }
+
+ const MCAsmInfo *getAsmInfo() const { return MAI; }
+
+ const MCRegisterInfo *getRegisterInfo() const { return MRI; }
+
+ const MCObjectFileInfo *getObjectFileInfo() const { return MOFI; }
+
+ void setAllowTemporaryLabels(bool Value) { AllowTemporaryLabels = Value; }
+
+ /// @name Module Lifetime Management
+ /// @{
+
+ /// reset - return object to right after construction state to prepare
+ /// to process a new module
+ void reset();
+
+ /// @}
+
+ /// @name Symbol Management
+ /// @{
+
+ /// CreateTempSymbol - Create and return a new assembler temporary symbol
+ /// with a unique but unspecified name.
+ MCSymbol *CreateTempSymbol();
+
+ /// 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
+ /// symbol for numbered label (used for "1b" or 1f" references).
+ MCSymbol *GetDirectionalLocalSymbol(int64_t LocalLabelVal, int bORf);
/// GetOrCreateSymbol - Lookup the symbol inside with the specified
- /// @param Name. If it exists, return it. If not, create a forward
+ /// @p Name. If it exists, return it. If not, create a forward
/// reference and return it.
///
/// @param Name - The symbol name, which must be unique across all symbols.
- MCSymbol *GetOrCreateSymbol(const StringRef &Name);
-
- /// CreateTemporarySymbol - Create a new temporary symbol with the specified
- /// @param Name.
- ///
- /// @param Name - The symbol name, for debugging purposes only, temporary
- /// symbols do not surive assembly. If non-empty the name must be unique
- /// across all symbols.
- MCSymbol *CreateTemporarySymbol(const StringRef &Name = "");
+ MCSymbol *GetOrCreateSymbol(StringRef Name);
+ MCSymbol *GetOrCreateSymbol(const Twine &Name);
+
+ /// 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 Management
+ /// @{
- /// LookupSymbol - Get the symbol for @param Name, or null.
- MCSymbol *LookupSymbol(const StringRef &Name) const;
+ /// getMachOSection - Return the MCSection for the specified mach-o section.
+ /// This requires the operands to be valid.
+ const MCSectionMachO *getMachOSection(StringRef Segment,
+ StringRef Section,
+ unsigned TypeAndAttributes,
+ unsigned Reserved2,
+ SectionKind K);
+ const MCSectionMachO *getMachOSection(StringRef Segment,
+ StringRef Section,
+ unsigned TypeAndAttributes,
+ SectionKind K) {
+ return getMachOSection(Segment, Section, TypeAndAttributes, 0, K);
+ }
+
+ 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 MCSectionCOFF *getCOFFSection(StringRef Section,
+ unsigned Characteristics,
+ SectionKind Kind,
+ StringRef COMDATSymName,
+ int Selection,
+ const MCSectionCOFF *Assoc = 0);
+
+ const MCSectionCOFF *getCOFFSection(StringRef Section,
+ unsigned Characteristics,
+ SectionKind Kind);
+
+ const MCSectionCOFF *getCOFFSection(StringRef Section);
+
+ /// @}
+
+ /// @name Dwarf Management
+ /// @{
+
+ /// \brief Get the compilation directory for DW_AT_comp_dir
+ /// This can be overridden by clients which want to control the reported
+ /// compilation directory and have it be something other than the current
+ /// working directory.
+ /// Returns an empty string if the current directory cannot be determined.
+ StringRef getCompilationDir() const { return CompilationDir; }
+
+ /// \brief Set the compilation directory for DW_AT_comp_dir
+ /// Override the default (CWD) compilation directory.
+ void setCompilationDir(StringRef S) { CompilationDir = S.str(); }
+
+ /// \brief Get the main file name for use in error messages and debug
+ /// info. This can be set to ensure we've got the correct file name
+ /// after preprocessing or for -save-temps.
+ const std::string &getMainFileName() const { return MainFileName; }
+
+ /// \brief Set the main file name and override the default.
+ void setMainFileName(StringRef S) { MainFileName = S.str(); }
+
+ /// GetDwarfFile - creates an entry in the dwarf file and directory tables.
+ unsigned GetDwarfFile(StringRef Directory, StringRef FileName,
+ unsigned FileNumber, unsigned CUID);
+
+ bool isValidDwarfFileNumber(unsigned FileNumber, unsigned CUID = 0);
+
+ bool hasDwarfFiles() const {
+ // Traverse MCDwarfFilesCUMap and check whether each entry is empty.
+ for (const auto &FileTable : MCDwarfFileTablesCUMap)
+ if (!FileTable.second.getMCDwarfFiles().empty())
+ return true;
+ return false;
+ }
+
+ const std::map<unsigned, MCDwarfFileTable> &getMCDwarfFileTables() const {
+ return MCDwarfFileTablesCUMap;
+ }
+
+ MCDwarfFileTable &getMCDwarfFileTable(unsigned CUID) {
+ return MCDwarfFileTablesCUMap[CUID];
+ }
+
+ const MCDwarfFileTable &getMCDwarfFileTable(unsigned CUID) const {
+ auto I = MCDwarfFileTablesCUMap.find(CUID);
+ assert(I != MCDwarfFileTablesCUMap.end());
+ return I->second;
+ }
+
+ const SmallVectorImpl<MCDwarfFile *> &getMCDwarfFiles(unsigned CUID = 0) {
+ return getMCDwarfFileTable(CUID).getMCDwarfFiles();
+ }
+ const SmallVectorImpl<StringRef> &getMCDwarfDirs(unsigned CUID = 0) {
+ return getMCDwarfFileTable(CUID).getMCDwarfDirs();
+ }
+
+ bool hasMCLineSections() const {
+ for (const auto &Table : MCDwarfFileTablesCUMap)
+ if (!Table.second.getMCDwarfFiles().empty() || Table.second.getLabel())
+ return true;
+ return false;
+ }
+ unsigned getDwarfCompileUnitID() {
+ return DwarfCompileUnitID;
+ }
+ void setDwarfCompileUnitID(unsigned CUIndex) {
+ DwarfCompileUnitID = CUIndex;
+ }
+ MCSymbol *getMCLineTableSymbol(unsigned ID) const {
+ return getMCDwarfFileTable(ID).getLabel();
+ }
+ void setMCLineTableSymbol(MCSymbol *Sym, unsigned ID) {
+ getMCDwarfFileTable(ID).setLabel(Sym);
+ }
+
+ /// 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; }
- /// ClearSymbolValue - Erase a value binding for @param Symbol, if one
- /// exists.
- void ClearSymbolValue(MCSymbol *Symbol);
+ 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<const MCGenDwarfLabelEntry *>
+ &getMCGenDwarfLabelEntries() const {
+ return MCGenDwarfLabelEntries;
+ }
+ void addMCGenDwarfLabelEntry(const MCGenDwarfLabelEntry *E) {
+ MCGenDwarfLabelEntries.push_back(E);
+ }
- /// SetSymbolValue - Set the value binding for @param Symbol to @param
- /// Value.
- void SetSymbolValue(MCSymbol *Symbol, const MCValue &Value);
+ void setDwarfDebugFlags(StringRef S) { DwarfDebugFlags = S; }
+ StringRef getDwarfDebugFlags() { return DwarfDebugFlags; }
- /// GetSymbolValue - Return the current value for @param Symbol, or null if
- /// none exists.
- const MCValue *GetSymbolValue(MCSymbol *Symbol) const;
+ void setDwarfDebugProducer(StringRef S) { DwarfDebugProducer = S; }
+ StringRef getDwarfDebugProducer() { return DwarfDebugProducer; }
+
+ /// @}
+
+ char *getSecureLogFile() { return SecureLogFile; }
+ raw_ostream *getSecureLog() { return SecureLog; }
+ bool getSecureLogUsed() { return SecureLogUsed; }
+ void setSecureLog(raw_ostream *Value) {
+ SecureLog = Value;
+ }
+ void setSecureLogUsed(bool Value) {
+ SecureLogUsed = Value;
+ }
void *Allocate(unsigned Size, unsigned Align = 8) {
return Allocator.Allocate(Size, Align);
}
- void Deallocate(void *Ptr) {
+ void Deallocate(void *Ptr) {
}
+
+ // Unrecoverable error has occurred. 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
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