#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/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 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;
+ const MCRegisterInfo *MRI;
/// The MCObjectFileInfo for this target.
const MCObjectFileInfo *MOFI;
/// .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, MCDwarfFileTable> MCDwarfFileTablesCUMap;
/// The current dwarf line information from the last dwarf .loc directive.
MCDwarfLoc CurrentDwarfLoc;
/// Symbols created for the start and end of this section.
MCSymbol *GenDwarfSectionStartSym, *GenDwarfSectionEndSym;
- /// The information gathered from labels that will have dwarf subprogram
+ /// The information gathered from labels that will have dwarf label
/// entries when generating dwarf assembly source files.
- std::vector<const MCGenDwarfSubprogramEntry *> MCGenDwarfSubprogramEntries;
+ 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 dwarf line information from the .loc directives for the sections
- /// with assembled machine instructions have after seeing .loc directives.
- DenseMap<const MCSection *, MCLineSection *> MCLineSections;
- /// We need a deterministic iteration order, so we remember the order
- /// the elements were added.
- std::vector<const MCSection *> MCLineSectionOrder;
+ /// 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:
- explicit MCContext(const MCAsmInfo &MAI, const MCRegisterInfo &MRI,
- const MCObjectFileInfo *MOFI);
+ explicit MCContext(const MCAsmInfo *MAI, const MCRegisterInfo *MRI,
+ const MCObjectFileInfo *MOFI, const SourceMgr *Mgr = 0,
+ bool DoAutoReset = true);
~MCContext();
- const MCAsmInfo &getAsmInfo() const { return MAI; }
+ const SourceMgr *getSourceManager() const { return SrcMgr; }
+
+ const MCAsmInfo *getAsmInfo() const { return MAI; }
- const MCRegisterInfo &getRegisterInfo() const { return MRI; }
+ 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
/// @{
/// 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);
/// 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
const MCSectionELF *CreateELFGroupSection();
- const MCSection *getCOFFSection(StringRef Section, unsigned Characteristics,
- int Selection, SectionKind Kind);
+ const MCSectionCOFF *getCOFFSection(StringRef Section,
+ unsigned Characteristics,
+ SectionKind Kind,
+ StringRef COMDATSymName,
+ int Selection,
+ const MCSectionCOFF *Assoc = 0);
- const MCSection *getCOFFSection(StringRef Section, unsigned Characteristics,
- SectionKind Kind) {
- return getCOFFSection (Section, Characteristics, 0, Kind);
- }
+ 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 FileNumber, unsigned CUID);
- bool isValidDwarfFileNumber(unsigned FileNumber);
+ bool isValidDwarfFileNumber(unsigned FileNumber, unsigned CUID = 0);
bool hasDwarfFiles() const {
- return !MCDwarfFiles.empty();
+ // 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::vector<MCDwarfFile *> &getMCDwarfFiles() {
- return MCDwarfFiles;
+ const std::map<unsigned, MCDwarfFileTable> &getMCDwarfFileTables() const {
+ return MCDwarfFileTablesCUMap;
}
- const std::vector<StringRef> &getMCDwarfDirs() {
- return MCDwarfDirs;
+
+ MCDwarfFileTable &getMCDwarfFileTable(unsigned CUID) {
+ return MCDwarfFileTablesCUMap[CUID];
}
- const DenseMap<const MCSection *, MCLineSection *>
- &getMCLineSections() const {
- return MCLineSections;
+ const MCDwarfFileTable &getMCDwarfFileTable(unsigned CUID) const {
+ auto I = MCDwarfFileTablesCUMap.find(CUID);
+ assert(I != MCDwarfFileTablesCUMap.end());
+ return I->second;
}
- const std::vector<const MCSection *> &getMCLineSectionOrder() const {
- return MCLineSectionOrder;
+
+ const SmallVectorImpl<MCDwarfFile *> &getMCDwarfFiles(unsigned CUID = 0) {
+ return getMCDwarfFileTable(CUID).getMCDwarfFiles();
}
- void addMCLineSection(const MCSection *Sec, MCLineSection *Line) {
- MCLineSections[Sec] = Line;
- MCLineSectionOrder.push_back(Sec);
+ 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
void setGenDwarfSectionEndSym(MCSymbol *Sym) {
GenDwarfSectionEndSym = Sym;
}
- const std::vector<const MCGenDwarfSubprogramEntry *>
- &getMCGenDwarfSubprogramEntries() const {
- return MCGenDwarfSubprogramEntries;
+ const std::vector<const MCGenDwarfLabelEntry *>
+ &getMCGenDwarfLabelEntries() const {
+ return MCGenDwarfLabelEntries;
}
- void addMCGenDwarfSubprogramEntry(const MCGenDwarfSubprogramEntry *E) {
- MCGenDwarfSubprogramEntries.push_back(E);
+ 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; }
+
/// @}
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);
};
} // end namespace llvm
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