#ifndef LLVM_MC_MCCONTEXT_H
#define LLVM_MC_MCCONTEXT_H
-#include "llvm/MC/SectionKind.h"
-#include "llvm/MC/MCDwarf.h"
#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/SetVector.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringMap.h"
+#include "llvm/MC/MCDwarf.h"
+#include "llvm/MC/MCStreamer.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 <tuple>
#include <vector> // FIXME: Shouldn't be needed.
namespace llvm {
class MCSection;
class MCSymbol;
class MCLabel;
- class MCDwarfFile;
+ struct 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;
/// The MCAsmInfo for this target.
- const MCAsmInfo &MAI;
+ const MCAsmInfo *MAI;
+
+ /// 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<MCSymbol*> Symbols;
+ SymbolTable Symbols;
+
+ /// ELF sections can have a corresponding symbol. This maps one to the
+ /// other.
+ DenseMap<const MCSectionELF*, MCSymbol*> SectionSymbols;
+
+ /// A maping from a local label number and an instance count to a symbol.
+ /// For example, in the assembly
+ /// 1:
+ /// 2:
+ /// 1:
+ /// We have three labels represented by the pairs (1, 0), (2, 0) and (1, 1)
+ DenseMap<std::pair<unsigned, unsigned>, MCSymbol*> LocalSymbols;
+
+ /// 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.
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);
+ unsigned NextInstance(unsigned 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 enviromment variable
+ unsigned GetInstance(unsigned 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;
/// .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.
- std::vector<MCDwarfFile *> MCDwarfFiles;
- std::vector<StringRef> MCDwarfDirs;
+ /// 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, MCDwarfLineTable> MCDwarfLineTablesCUMap;
/// The current dwarf line information from the last dwarf .loc directive.
MCDwarfLoc CurrentDwarfLoc;
bool DwarfLocSeen;
- /// The dwarf line information from the .loc directives for the sections
- /// with assembled machine instructions have after seeing .loc directives.
- DenseMap<const MCSection *, MCLineSection *> MCLineSections;
+ /// 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;
+
+ /// Symbols created for the start and end of each section, used for
+ /// generating the .debug_ranges and .debug_aranges sections.
+ MapVector<const MCSection *, std::pair<MCSymbol *, MCSymbol *> >
+ SectionStartEndSyms;
+
+ /// The information gathered from labels that will have dwarf label
+ /// entries when generating dwarf assembly source files.
+ std::vector<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;
+
+ /// The maximum version of dwarf that we should emit.
+ uint16_t DwarfVersion;
+
+ /// 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;
+
+ typedef std::pair<std::string, std::string> SectionGroupPair;
+ typedef std::tuple<std::string, std::string, int> SectionGroupTriple;
+
+ StringMap<const MCSectionMachO*> MachOUniquingMap;
+ std::map<SectionGroupPair, const MCSectionELF *> ELFUniquingMap;
+ std::map<SectionGroupTriple, const MCSectionCOFF *> COFFUniquingMap;
+
+ /// Do automatic reset in destructor
+ bool AutoReset;
+
+ MCSymbol *CreateSymbol(StringRef Name);
+
+ MCSymbol *getOrCreateDirectionalLocalSymbol(unsigned LocalLabelVal,
+ unsigned Instance);
- /// 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;
public:
- explicit MCContext(const MCAsmInfo &MAI);
+ explicit MCContext(const MCAsmInfo *MAI, const MCRegisterInfo *MRI,
+ const MCObjectFileInfo *MOFI,
+ const SourceMgr *Mgr = nullptr, bool DoAutoReset = true);
~MCContext();
-
- const MCAsmInfo &getAsmInfo() const { return MAI; }
- /// @name Symbol Managment
+ 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
+ /// @{
+
+ /// CreateLinkerPrivateTempSymbol - Create and return a new linker temporary
+ /// symbol with a unique but unspecified name.
+ MCSymbol *CreateLinkerPrivateTempSymbol();
+
/// 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).
- MCSymbol *CreateDirectionalLocalSymbol(int64_t LocalLabelVal);
+ /// getUniqueSymbolID() - Return a unique identifier for use in constructing
+ /// symbol names.
+ unsigned getUniqueSymbolID() { return NextUniqueID++; }
+
+ /// Create the definition of a directional local symbol for numbered label
+ /// (used for "1:" definitions).
+ MCSymbol *CreateDirectionalLocalSymbol(unsigned 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);
+ /// Create and return a directional local symbol for numbered label (used
+ /// for "1b" or 1f" references).
+ MCSymbol *GetDirectionalLocalSymbol(unsigned LocalLabelVal, bool Before);
/// GetOrCreateSymbol - Lookup the symbol inside with the specified
/// @p Name. If it exists, return it. If not, create a forward
MCSymbol *GetOrCreateSymbol(StringRef Name);
MCSymbol *GetOrCreateSymbol(const Twine &Name);
+ MCSymbol *getOrCreateSectionSymbol(const MCSectionELF &Section);
+
/// 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.
SectionKind K) {
return getMachOSection(Segment, Section, TypeAndAttributes, 0, K);
}
-
- const MCSection *getELFSection(StringRef Section, unsigned Type,
- unsigned Flags, SectionKind Kind,
- bool IsExplicit = false,
- unsigned EntrySize = 0);
-
- const MCSection *getCOFFSection(StringRef Section, unsigned Characteristics,
- int Selection, SectionKind Kind);
-
- const MCSection *getCOFFSection(StringRef Section, unsigned Characteristics,
- SectionKind Kind) {
- return getCOFFSection (Section, Characteristics, 0, Kind);
- }
-
+ 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);
+
+ void renameELFSection(const MCSectionELF *Section, StringRef Name);
+
+ const MCSectionELF *CreateELFGroupSection();
+
+ const MCSectionCOFF *getCOFFSection(StringRef Section,
+ unsigned Characteristics,
+ SectionKind Kind,
+ StringRef COMDATSymName, int Selection);
+
+ const MCSectionCOFF *getCOFFSection(StringRef Section,
+ unsigned Characteristics,
+ SectionKind Kind);
+
+ const MCSectionCOFF *getCOFFSection(StringRef Section);
+
+ /// Gets or creates a section equivalent to Sec that is associated with the
+ /// section containing KeySym. For example, to create a debug info section
+ /// associated with an inline function, pass the normal debug info section
+ /// as Sec and the function symbol as KeySym.
+ const MCSectionCOFF *getAssociativeCOFFSection(const MCSectionCOFF *Sec,
+ const MCSymbol *KeySym);
+
/// @}
- /// @name Dwarf Managment
+ /// @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; }
+
/// 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, unsigned CUID);
- bool isValidDwarfFileNumber(unsigned FileNumber);
+ bool isValidDwarfFileNumber(unsigned FileNumber, unsigned CUID = 0);
- bool hasDwarfFiles(void) {
- return MCDwarfFiles.size() != 0;
+ const std::map<unsigned, MCDwarfLineTable> &getMCDwarfLineTables() const {
+ return MCDwarfLineTablesCUMap;
}
- const std::vector<MCDwarfFile *> &getMCDwarfFiles() {
- return MCDwarfFiles;
+ MCDwarfLineTable &getMCDwarfLineTable(unsigned CUID) {
+ return MCDwarfLineTablesCUMap[CUID];
+ }
+
+ const MCDwarfLineTable &getMCDwarfLineTable(unsigned CUID) const {
+ auto I = MCDwarfLineTablesCUMap.find(CUID);
+ assert(I != MCDwarfLineTablesCUMap.end());
+ return I->second;
+ }
+
+ const SmallVectorImpl<MCDwarfFile> &getMCDwarfFiles(unsigned CUID = 0) {
+ return getMCDwarfLineTable(CUID).getMCDwarfFiles();
+ }
+ const SmallVectorImpl<std::string> &getMCDwarfDirs(unsigned CUID = 0) {
+ return getMCDwarfLineTable(CUID).getMCDwarfDirs();
+ }
+
+ bool hasMCLineSections() const {
+ for (const auto &Table : MCDwarfLineTablesCUMap)
+ if (!Table.second.getMCDwarfFiles().empty() || Table.second.getLabel())
+ return true;
+ return false;
+ }
+ unsigned getDwarfCompileUnitID() {
+ return DwarfCompileUnitID;
}
- const std::vector<StringRef> &getMCDwarfDirs() {
- return MCDwarfDirs;
+ void setDwarfCompileUnitID(unsigned CUIndex) {
+ DwarfCompileUnitID = CUIndex;
}
- DenseMap<const MCSection *, MCLineSection *> &getMCLineSections() {
- return MCLineSections;
+ void setMCLineTableCompilationDir(unsigned CUID, StringRef CompilationDir) {
+ getMCDwarfLineTable(CUID).setCompilationDir(CompilationDir);
}
/// setCurrentDwarfLoc - saves the information from the currently parsed
/// 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 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; }
+ void setGenDwarfFileNumber(unsigned FileNumber) {
+ GenDwarfFileNumber = FileNumber;
+ }
+ MapVector<const MCSection *, std::pair<MCSymbol *, MCSymbol *> > &
+ getGenDwarfSectionSyms() {
+ return SectionStartEndSyms;
+ }
+ std::pair<MapVector<const MCSection *,
+ std::pair<MCSymbol *, MCSymbol *> >::iterator,
+ bool>
+ addGenDwarfSection(const MCSection *Sec) {
+ return SectionStartEndSyms.insert(
+ std::make_pair(Sec, std::make_pair(nullptr, nullptr)));
+ }
+ void finalizeDwarfSections(MCStreamer &MCOS);
+ const std::vector<MCGenDwarfLabelEntry> &getMCGenDwarfLabelEntries() const {
+ return MCGenDwarfLabelEntries;
+ }
+ void addMCGenDwarfLabelEntry(const MCGenDwarfLabelEntry &E) {
+ MCGenDwarfLabelEntries.push_back(E);
+ }
+
+ void setDwarfDebugFlags(StringRef S) { DwarfDebugFlags = S; }
+ StringRef getDwarfDebugFlags() { return DwarfDebugFlags; }
+
+ void setDwarfDebugProducer(StringRef S) { DwarfDebugProducer = S; }
+ StringRef getDwarfDebugProducer() { return DwarfDebugProducer; }
+
+ void setDwarfVersion(uint16_t v) { DwarfVersion = v; }
+ uint16_t getDwarfVersion() const { return DwarfVersion; }
+
/// @}
char *getSecureLogFile() { return SecureLogFile; }
}
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) const;
};
} // end namespace llvm
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