| //===- MCContext.h - Machine Code Context -----------------------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_MC_MCCONTEXT_H |
| #define LLVM_MC_MCCONTEXT_H |
| |
| #include "llvm/ADT/DenseMap.h" |
| #include "llvm/ADT/Optional.h" |
| #include "llvm/ADT/SetVector.h" |
| #include "llvm/ADT/SmallString.h" |
| #include "llvm/ADT/SmallVector.h" |
| #include "llvm/ADT/StringMap.h" |
| #include "llvm/ADT/StringRef.h" |
| #include "llvm/ADT/Twine.h" |
| #include "llvm/BinaryFormat/Dwarf.h" |
| #include "llvm/MC/MCAsmMacro.h" |
| #include "llvm/MC/MCDwarf.h" |
| #include "llvm/MC/MCSubtargetInfo.h" |
| #include "llvm/MC/SectionKind.h" |
| #include "llvm/Support/Allocator.h" |
| #include "llvm/Support/Compiler.h" |
| #include "llvm/Support/Error.h" |
| #include "llvm/Support/MD5.h" |
| #include "llvm/Support/raw_ostream.h" |
| #include <algorithm> |
| #include <cassert> |
| #include <cstddef> |
| #include <cstdint> |
| #include <map> |
| #include <memory> |
| #include <string> |
| #include <utility> |
| #include <vector> |
| |
| namespace llvm { |
| |
| class CodeViewContext; |
| class MCAsmInfo; |
| class MCLabel; |
| class MCObjectFileInfo; |
| class MCRegisterInfo; |
| class MCSection; |
| class MCSectionCOFF; |
| class MCSectionELF; |
| class MCSectionMachO; |
| class MCSectionWasm; |
| class MCStreamer; |
| class MCSymbol; |
| class MCSymbolELF; |
| class MCSymbolWasm; |
| class SMLoc; |
| class SourceMgr; |
| |
| /// Context object for machine code objects. This class owns all of the |
| /// sections that it creates. |
| /// |
| class MCContext { |
| public: |
| using SymbolTable = StringMap<MCSymbol *, BumpPtrAllocator &>; |
| |
| private: |
| /// The SourceMgr for this object, if any. |
| const SourceMgr *SrcMgr; |
| |
| /// The SourceMgr for inline assembly, if any. |
| SourceMgr *InlineSrcMgr; |
| |
| /// The MCAsmInfo for this target. |
| const MCAsmInfo *MAI; |
| |
| /// The MCRegisterInfo for this target. |
| const MCRegisterInfo *MRI; |
| |
| /// The MCObjectFileInfo for this target. |
| const MCObjectFileInfo *MOFI; |
| |
| std::unique_ptr<CodeViewContext> CVContext; |
| |
| /// 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; |
| |
| SpecificBumpPtrAllocator<MCSectionCOFF> COFFAllocator; |
| SpecificBumpPtrAllocator<MCSectionELF> ELFAllocator; |
| SpecificBumpPtrAllocator<MCSectionMachO> MachOAllocator; |
| SpecificBumpPtrAllocator<MCSectionWasm> WasmAllocator; |
| |
| /// Bindings of names to symbols. |
| SymbolTable Symbols; |
| |
| /// A mapping 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; |
| |
| /// Keeps tracks of names that were used both for used declared and |
| /// artificial symbols. The value is "true" if the name has been used for a |
| /// non-section symbol (there can be at most one of those, plus an unlimited |
| /// number of section symbols with the same name). |
| StringMap<bool, BumpPtrAllocator &> UsedNames; |
| |
| /// The next ID to dole out to an unnamed assembler temporary symbol with |
| /// a given prefix. |
| StringMap<unsigned> NextID; |
| |
| /// 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(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(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; |
| /// The stream that gets written to for the .secure_log_unique directive. |
| std::unique_ptr<raw_fd_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 = false; |
| |
| /// The compilation directory to use for DW_AT_comp_dir. |
| SmallString<128> CompilationDir; |
| |
| /// Prefix replacement map for source file information. |
| std::map<const std::string, const std::string> DebugPrefixMap; |
| |
| /// 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, MCDwarfLineTable> MCDwarfLineTablesCUMap; |
| |
| /// The current dwarf line information from the last dwarf .loc directive. |
| MCDwarfLoc CurrentDwarfLoc; |
| bool DwarfLocSeen = false; |
| |
| /// Generate dwarf debugging info for assembly source files. |
| bool GenDwarfForAssembly = false; |
| |
| /// The current dwarf file number when generate dwarf debugging info for |
| /// assembly source files. |
| unsigned GenDwarfFileNumber = 0; |
| |
| /// Sections for generating the .debug_ranges and .debug_aranges sections. |
| SetVector<MCSection *> SectionsForRanges; |
| |
| /// 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 = 4; |
| |
| /// Honor temporary labels, this is useful for debugging semantic |
| /// differences between temporary and non-temporary labels (primarily on |
| /// Darwin). |
| bool AllowTemporaryLabels = true; |
| bool UseNamesOnTempLabels = true; |
| |
| /// The Compile Unit ID that we are currently processing. |
| unsigned DwarfCompileUnitID = 0; |
| |
| struct ELFSectionKey { |
| std::string SectionName; |
| StringRef GroupName; |
| unsigned UniqueID; |
| |
| ELFSectionKey(StringRef SectionName, StringRef GroupName, |
| unsigned UniqueID) |
| : SectionName(SectionName), GroupName(GroupName), UniqueID(UniqueID) { |
| } |
| |
| bool operator<(const ELFSectionKey &Other) const { |
| if (SectionName != Other.SectionName) |
| return SectionName < Other.SectionName; |
| if (GroupName != Other.GroupName) |
| return GroupName < Other.GroupName; |
| return UniqueID < Other.UniqueID; |
| } |
| }; |
| |
| struct COFFSectionKey { |
| std::string SectionName; |
| StringRef GroupName; |
| int SelectionKey; |
| unsigned UniqueID; |
| |
| COFFSectionKey(StringRef SectionName, StringRef GroupName, |
| int SelectionKey, unsigned UniqueID) |
| : SectionName(SectionName), GroupName(GroupName), |
| SelectionKey(SelectionKey), UniqueID(UniqueID) {} |
| |
| bool operator<(const COFFSectionKey &Other) const { |
| if (SectionName != Other.SectionName) |
| return SectionName < Other.SectionName; |
| if (GroupName != Other.GroupName) |
| return GroupName < Other.GroupName; |
| if (SelectionKey != Other.SelectionKey) |
| return SelectionKey < Other.SelectionKey; |
| return UniqueID < Other.UniqueID; |
| } |
| }; |
| |
| struct WasmSectionKey { |
| std::string SectionName; |
| StringRef GroupName; |
| unsigned UniqueID; |
| |
| WasmSectionKey(StringRef SectionName, StringRef GroupName, |
| unsigned UniqueID) |
| : SectionName(SectionName), GroupName(GroupName), UniqueID(UniqueID) { |
| } |
| |
| bool operator<(const WasmSectionKey &Other) const { |
| if (SectionName != Other.SectionName) |
| return SectionName < Other.SectionName; |
| if (GroupName != Other.GroupName) |
| return GroupName < Other.GroupName; |
| return UniqueID < Other.UniqueID; |
| } |
| }; |
| |
| StringMap<MCSectionMachO *> MachOUniquingMap; |
| std::map<ELFSectionKey, MCSectionELF *> ELFUniquingMap; |
| std::map<COFFSectionKey, MCSectionCOFF *> COFFUniquingMap; |
| std::map<WasmSectionKey, MCSectionWasm *> WasmUniquingMap; |
| StringMap<bool> RelSecNames; |
| |
| SpecificBumpPtrAllocator<MCSubtargetInfo> MCSubtargetAllocator; |
| |
| /// Do automatic reset in destructor |
| bool AutoReset; |
| |
| bool HadError = false; |
| |
| MCSymbol *createSymbolImpl(const StringMapEntry<bool> *Name, |
| bool CanBeUnnamed); |
| MCSymbol *createSymbol(StringRef Name, bool AlwaysAddSuffix, |
| bool IsTemporary); |
| |
| MCSymbol *getOrCreateDirectionalLocalSymbol(unsigned LocalLabelVal, |
| unsigned Instance); |
| |
| MCSectionELF *createELFSectionImpl(StringRef Section, unsigned Type, |
| unsigned Flags, SectionKind K, |
| unsigned EntrySize, |
| const MCSymbolELF *Group, |
| unsigned UniqueID, |
| const MCSymbolELF *Associated); |
| |
| /// Map of currently defined macros. |
| StringMap<MCAsmMacro> MacroMap; |
| |
| public: |
| explicit MCContext(const MCAsmInfo *MAI, const MCRegisterInfo *MRI, |
| const MCObjectFileInfo *MOFI, |
| const SourceMgr *Mgr = nullptr, bool DoAutoReset = true); |
| MCContext(const MCContext &) = delete; |
| MCContext &operator=(const MCContext &) = delete; |
| ~MCContext(); |
| |
| const SourceMgr *getSourceManager() const { return SrcMgr; } |
| |
| void setInlineSourceManager(SourceMgr *SM) { InlineSrcMgr = SM; } |
| |
| const MCAsmInfo *getAsmInfo() const { return MAI; } |
| |
| const MCRegisterInfo *getRegisterInfo() const { return MRI; } |
| |
| const MCObjectFileInfo *getObjectFileInfo() const { return MOFI; } |
| |
| CodeViewContext &getCVContext(); |
| |
| void setAllowTemporaryLabels(bool Value) { AllowTemporaryLabels = Value; } |
| void setUseNamesOnTempLabels(bool Value) { UseNamesOnTempLabels = 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 |
| /// @{ |
| |
| /// Create and return a new linker temporary symbol with a unique but |
| /// unspecified name. |
| MCSymbol *createLinkerPrivateTempSymbol(); |
| |
| /// Create and return a new assembler temporary symbol with a unique but |
| /// unspecified name. |
| MCSymbol *createTempSymbol(bool CanBeUnnamed = true); |
| |
| MCSymbol *createTempSymbol(const Twine &Name, bool AlwaysAddSuffix, |
| bool CanBeUnnamed = true); |
| |
| /// Create the definition of a directional local symbol for numbered label |
| /// (used for "1:" definitions). |
| MCSymbol *createDirectionalLocalSymbol(unsigned LocalLabelVal); |
| |
| /// Create and return a directional local symbol for numbered label (used |
| /// for "1b" or 1f" references). |
| MCSymbol *getDirectionalLocalSymbol(unsigned LocalLabelVal, bool Before); |
| |
| /// Lookup the symbol inside with the specified \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 Twine &Name); |
| |
| /// Gets a symbol that will be defined to the final stack offset of a local |
| /// variable after codegen. |
| /// |
| /// \param Idx - The index of a local variable passed to \@llvm.localescape. |
| MCSymbol *getOrCreateFrameAllocSymbol(StringRef FuncName, unsigned Idx); |
| |
| MCSymbol *getOrCreateParentFrameOffsetSymbol(StringRef FuncName); |
| |
| MCSymbol *getOrCreateLSDASymbol(StringRef FuncName); |
| |
| /// Get the symbol for \p Name, or null. |
| MCSymbol *lookupSymbol(const Twine &Name) const; |
| |
| /// Set value for a symbol. |
| void setSymbolValue(MCStreamer &Streamer, StringRef Sym, uint64_t Val); |
| |
| /// 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 |
| /// @{ |
| |
| enum : unsigned { |
| /// Pass this value as the UniqueID during section creation to get the |
| /// generic section with the given name and characteristics. The usual |
| /// sections such as .text use this ID. |
| GenericSectionID = ~0U |
| }; |
| |
| /// Return the MCSection for the specified mach-o section. This requires |
| /// the operands to be valid. |
| MCSectionMachO *getMachOSection(StringRef Segment, StringRef Section, |
| unsigned TypeAndAttributes, |
| unsigned Reserved2, SectionKind K, |
| const char *BeginSymName = nullptr); |
| |
| MCSectionMachO *getMachOSection(StringRef Segment, StringRef Section, |
| unsigned TypeAndAttributes, SectionKind K, |
| const char *BeginSymName = nullptr) { |
| return getMachOSection(Segment, Section, TypeAndAttributes, 0, K, |
| BeginSymName); |
| } |
| |
| MCSectionELF *getELFSection(const Twine &Section, unsigned Type, |
| unsigned Flags) { |
| return getELFSection(Section, Type, Flags, 0, ""); |
| } |
| |
| MCSectionELF *getELFSection(const Twine &Section, unsigned Type, |
| unsigned Flags, unsigned EntrySize, |
| const Twine &Group) { |
| return getELFSection(Section, Type, Flags, EntrySize, Group, ~0); |
| } |
| |
| MCSectionELF *getELFSection(const Twine &Section, unsigned Type, |
| unsigned Flags, unsigned EntrySize, |
| const Twine &Group, unsigned UniqueID) { |
| return getELFSection(Section, Type, Flags, EntrySize, Group, UniqueID, |
| nullptr); |
| } |
| |
| MCSectionELF *getELFSection(const Twine &Section, unsigned Type, |
| unsigned Flags, unsigned EntrySize, |
| const Twine &Group, unsigned UniqueID, |
| const MCSymbolELF *Associated); |
| |
| MCSectionELF *getELFSection(const Twine &Section, unsigned Type, |
| unsigned Flags, unsigned EntrySize, |
| const MCSymbolELF *Group, unsigned UniqueID, |
| const MCSymbolELF *Associated); |
| |
| /// Get a section with the provided group identifier. This section is |
| /// named by concatenating \p Prefix with '.' then \p Suffix. The \p Type |
| /// describes the type of the section and \p Flags are used to further |
| /// configure this named section. |
| MCSectionELF *getELFNamedSection(const Twine &Prefix, const Twine &Suffix, |
| unsigned Type, unsigned Flags, |
| unsigned EntrySize = 0); |
| |
| MCSectionELF *createELFRelSection(const Twine &Name, unsigned Type, |
| unsigned Flags, unsigned EntrySize, |
| const MCSymbolELF *Group, |
| const MCSectionELF *RelInfoSection); |
| |
| void renameELFSection(MCSectionELF *Section, StringRef Name); |
| |
| MCSectionELF *createELFGroupSection(const MCSymbolELF *Group); |
| |
| MCSectionCOFF *getCOFFSection(StringRef Section, unsigned Characteristics, |
| SectionKind Kind, StringRef COMDATSymName, |
| int Selection, |
| unsigned UniqueID = GenericSectionID, |
| const char *BeginSymName = nullptr); |
| |
| MCSectionCOFF *getCOFFSection(StringRef Section, unsigned Characteristics, |
| SectionKind Kind, |
| const char *BeginSymName = nullptr); |
| |
| 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. |
| MCSectionCOFF * |
| getAssociativeCOFFSection(MCSectionCOFF *Sec, const MCSymbol *KeySym, |
| unsigned UniqueID = GenericSectionID); |
| |
| MCSectionWasm *getWasmSection(const Twine &Section, SectionKind K) { |
| return getWasmSection(Section, K, nullptr); |
| } |
| |
| MCSectionWasm *getWasmSection(const Twine &Section, SectionKind K, |
| const char *BeginSymName) { |
| return getWasmSection(Section, K, "", ~0, BeginSymName); |
| } |
| |
| MCSectionWasm *getWasmSection(const Twine &Section, SectionKind K, |
| const Twine &Group, unsigned UniqueID) { |
| return getWasmSection(Section, K, Group, UniqueID, nullptr); |
| } |
| |
| MCSectionWasm *getWasmSection(const Twine &Section, SectionKind K, |
| const Twine &Group, unsigned UniqueID, |
| const char *BeginSymName); |
| |
| MCSectionWasm *getWasmSection(const Twine &Section, SectionKind K, |
| const MCSymbolWasm *Group, unsigned UniqueID, |
| const char *BeginSymName); |
| |
| // Create and save a copy of STI and return a reference to the copy. |
| MCSubtargetInfo &getSubtargetCopy(const MCSubtargetInfo &STI); |
| |
| /// @} |
| |
| /// \name Dwarf Management |
| /// @{ |
| |
| /// Get the compilation directory for DW_AT_comp_dir |
| /// The compilation directory should be set with \c setCompilationDir before |
| /// calling this function. If it is unset, an empty string will be returned. |
| StringRef getCompilationDir() const { return CompilationDir; } |
| |
| /// Set the compilation directory for DW_AT_comp_dir |
| void setCompilationDir(StringRef S) { CompilationDir = S.str(); } |
| |
| /// Get the debug prefix map. |
| const std::map<const std::string, const std::string> & |
| getDebugPrefixMap() const { |
| return DebugPrefixMap; |
| } |
| |
| /// Add an entry to the debug prefix map. |
| void addDebugPrefixMapEntry(const std::string &From, const std::string &To); |
| |
| // Remaps all debug directory paths in-place as per the debug prefix map. |
| void RemapDebugPaths(); |
| |
| /// 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; } |
| |
| /// Set the main file name and override the default. |
| void setMainFileName(StringRef S) { MainFileName = S; } |
| |
| /// Creates an entry in the dwarf file and directory tables. |
| Expected<unsigned> getDwarfFile(StringRef Directory, StringRef FileName, |
| unsigned FileNumber, |
| MD5::MD5Result *Checksum, |
| Optional<StringRef> Source, unsigned CUID); |
| |
| bool isValidDwarfFileNumber(unsigned FileNumber, unsigned CUID = 0); |
| |
| const std::map<unsigned, MCDwarfLineTable> &getMCDwarfLineTables() const { |
| return MCDwarfLineTablesCUMap; |
| } |
| |
| 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; } |
| |
| void setDwarfCompileUnitID(unsigned CUIndex) { |
| DwarfCompileUnitID = CUIndex; |
| } |
| |
| /// Specifies the "root" file and directory of the compilation unit. |
| /// These are "file 0" and "directory 0" in DWARF v5. |
| void setMCLineTableRootFile(unsigned CUID, StringRef CompilationDir, |
| StringRef Filename, MD5::MD5Result *Checksum, |
| Optional<StringRef> Source) { |
| getMCDwarfLineTable(CUID).setRootFile(CompilationDir, Filename, Checksum, |
| Source); |
| } |
| |
| /// Reports whether MD5 checksum usage is consistent (all-or-none). |
| bool isDwarfMD5UsageConsistent(unsigned CUID) const { |
| return getMCDwarfLineTable(CUID).isMD5UsageConsistent(); |
| } |
| |
| /// 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; } |
| |
| void setGenDwarfFileNumber(unsigned FileNumber) { |
| GenDwarfFileNumber = FileNumber; |
| } |
| |
| const SetVector<MCSection *> &getGenDwarfSectionSyms() { |
| return SectionsForRanges; |
| } |
| |
| bool addGenDwarfSection(MCSection *Sec) { |
| return SectionsForRanges.insert(Sec); |
| } |
| |
| 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; } |
| |
| dwarf::DwarfFormat getDwarfFormat() const { |
| // TODO: Support DWARF64 |
| return dwarf::DWARF32; |
| } |
| |
| void setDwarfVersion(uint16_t v) { DwarfVersion = v; } |
| uint16_t getDwarfVersion() const { return DwarfVersion; } |
| |
| /// @} |
| |
| char *getSecureLogFile() { return SecureLogFile; } |
| raw_fd_ostream *getSecureLog() { return SecureLog.get(); } |
| |
| void setSecureLog(std::unique_ptr<raw_fd_ostream> Value) { |
| SecureLog = std::move(Value); |
| } |
| |
| bool getSecureLogUsed() { return SecureLogUsed; } |
| void setSecureLogUsed(bool Value) { SecureLogUsed = Value; } |
| |
| void *allocate(unsigned Size, unsigned Align = 8) { |
| return Allocator.Allocate(Size, Align); |
| } |
| |
| void deallocate(void *Ptr) {} |
| |
| bool hadError() { return HadError; } |
| void reportError(SMLoc L, const Twine &Msg); |
| // 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 reportFatalError(SMLoc L, |
| const Twine &Msg); |
| |
| const MCAsmMacro *lookupMacro(StringRef Name) { |
| StringMap<MCAsmMacro>::iterator I = MacroMap.find(Name); |
| return (I == MacroMap.end()) ? nullptr : &I->getValue(); |
| } |
| |
| void defineMacro(StringRef Name, MCAsmMacro Macro) { |
| MacroMap.insert(std::make_pair(Name, std::move(Macro))); |
| } |
| |
| void undefineMacro(StringRef Name) { MacroMap.erase(Name); } |
| }; |
| |
| } // end namespace llvm |
| |
| // operator new and delete aren't allowed inside namespaces. |
| // The throw specifications are mandated by the standard. |
| /// Placement new for using the MCContext's allocator. |
| /// |
| /// This placement form of operator new uses the MCContext's allocator for |
| /// obtaining memory. It is a non-throwing new, which means that it returns |
| /// null on error. (If that is what the allocator does. The current does, so if |
| /// this ever changes, this operator will have to be changed, too.) |
| /// Usage looks like this (assuming there's an MCContext 'Context' in scope): |
| /// \code |
| /// // Default alignment (8) |
| /// IntegerLiteral *Ex = new (Context) IntegerLiteral(arguments); |
| /// // Specific alignment |
| /// IntegerLiteral *Ex2 = new (Context, 4) IntegerLiteral(arguments); |
| /// \endcode |
| /// Please note that you cannot use delete on the pointer; it must be |
| /// deallocated using an explicit destructor call followed by |
| /// \c Context.Deallocate(Ptr). |
| /// |
| /// \param Bytes The number of bytes to allocate. Calculated by the compiler. |
| /// \param C The MCContext that provides the allocator. |
| /// \param Alignment The alignment of the allocated memory (if the underlying |
| /// allocator supports it). |
| /// \return The allocated memory. Could be NULL. |
| inline void *operator new(size_t Bytes, llvm::MCContext &C, |
| size_t Alignment = 8) noexcept { |
| return C.allocate(Bytes, Alignment); |
| } |
| /// Placement delete companion to the new above. |
| /// |
| /// This operator is just a companion to the new above. There is no way of |
| /// invoking it directly; see the new operator for more details. This operator |
| /// is called implicitly by the compiler if a placement new expression using |
| /// the MCContext throws in the object constructor. |
| inline void operator delete(void *Ptr, llvm::MCContext &C, size_t) noexcept { |
| C.deallocate(Ptr); |
| } |
| |
| /// This placement form of operator new[] uses the MCContext's allocator for |
| /// obtaining memory. It is a non-throwing new[], which means that it returns |
| /// null on error. |
| /// Usage looks like this (assuming there's an MCContext 'Context' in scope): |
| /// \code |
| /// // Default alignment (8) |
| /// char *data = new (Context) char[10]; |
| /// // Specific alignment |
| /// char *data = new (Context, 4) char[10]; |
| /// \endcode |
| /// Please note that you cannot use delete on the pointer; it must be |
| /// deallocated using an explicit destructor call followed by |
| /// \c Context.Deallocate(Ptr). |
| /// |
| /// \param Bytes The number of bytes to allocate. Calculated by the compiler. |
| /// \param C The MCContext that provides the allocator. |
| /// \param Alignment The alignment of the allocated memory (if the underlying |
| /// allocator supports it). |
| /// \return The allocated memory. Could be NULL. |
| inline void *operator new[](size_t Bytes, llvm::MCContext &C, |
| size_t Alignment = 8) noexcept { |
| return C.allocate(Bytes, Alignment); |
| } |
| |
| /// Placement delete[] companion to the new[] above. |
| /// |
| /// This operator is just a companion to the new[] above. There is no way of |
| /// invoking it directly; see the new[] operator for more details. This operator |
| /// is called implicitly by the compiler if a placement new[] expression using |
| /// the MCContext throws in the object constructor. |
| inline void operator delete[](void *Ptr, llvm::MCContext &C) noexcept { |
| C.deallocate(Ptr); |
| } |
| |
| #endif // LLVM_MC_MCCONTEXT_H |