| //===-LTOModule.h - LLVM Link Time Optimizer ------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file declares the LTOModule class. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LTO_MODULE_H |
| #define LTO_MODULE_H |
| |
| #include "llvm-c/lto.h" |
| #include "llvm/ADT/StringMap.h" |
| #include "llvm/IR/Module.h" |
| #include "llvm/MC/MCContext.h" |
| #include "llvm/MC/MCObjectFileInfo.h" |
| #include "llvm/Object/IRObjectFile.h" |
| #include "llvm/Target/TargetMachine.h" |
| #include <string> |
| #include <vector> |
| |
| // Forward references to llvm classes. |
| namespace llvm { |
| class Function; |
| class GlobalValue; |
| class MemoryBuffer; |
| class TargetOptions; |
| class Value; |
| |
| //===----------------------------------------------------------------------===// |
| /// C++ class which implements the opaque lto_module_t type. |
| /// |
| struct LTOModule { |
| private: |
| typedef StringMap<uint8_t> StringSet; |
| |
| struct NameAndAttributes { |
| const char *name; |
| uint32_t attributes; |
| bool isFunction; |
| const GlobalValue *symbol; |
| }; |
| |
| std::unique_ptr<object::IRObjectFile> IRFile; |
| std::unique_ptr<TargetMachine> _target; |
| StringSet _linkeropt_strings; |
| std::vector<const char *> _deplibs; |
| std::vector<const char *> _linkeropts; |
| std::vector<NameAndAttributes> _symbols; |
| |
| // _defines and _undefines only needed to disambiguate tentative definitions |
| StringSet _defines; |
| StringMap<NameAndAttributes> _undefines; |
| std::vector<const char*> _asm_undefines; |
| |
| LTOModule(std::unique_ptr<object::IRObjectFile> Obj, TargetMachine *TM); |
| |
| public: |
| /// Returns 'true' if the file or memory contents is LLVM bitcode. |
| static bool isBitcodeFile(const void *mem, size_t length); |
| static bool isBitcodeFile(const char *path); |
| |
| /// Returns 'true' if the memory buffer is LLVM bitcode for the specified |
| /// triple. |
| static bool isBitcodeForTarget(MemoryBuffer *memBuffer, |
| StringRef triplePrefix); |
| |
| /// Create a MemoryBuffer from a memory range with an optional name. |
| static MemoryBuffer *makeBuffer(const void *mem, size_t length, |
| StringRef name = ""); |
| |
| /// Create an LTOModule. N.B. These methods take ownership of the buffer. The |
| /// caller must have initialized the Targets, the TargetMCs, the AsmPrinters, |
| /// and the AsmParsers by calling: |
| /// |
| /// InitializeAllTargets(); |
| /// InitializeAllTargetMCs(); |
| /// InitializeAllAsmPrinters(); |
| /// InitializeAllAsmParsers(); |
| static LTOModule *createFromFile(const char *path, TargetOptions options, |
| std::string &errMsg); |
| static LTOModule *createFromOpenFile(int fd, const char *path, size_t size, |
| TargetOptions options, |
| std::string &errMsg); |
| static LTOModule *createFromOpenFileSlice(int fd, const char *path, |
| size_t map_size, off_t offset, |
| TargetOptions options, |
| std::string &errMsg); |
| static LTOModule *createFromBuffer(const void *mem, size_t length, |
| TargetOptions options, std::string &errMsg, |
| StringRef path = ""); |
| |
| const Module &getModule() const { |
| return const_cast<LTOModule*>(this)->getModule(); |
| } |
| Module &getModule() { |
| return IRFile->getModule(); |
| } |
| |
| /// Return the Module's target triple. |
| const std::string &getTargetTriple() { |
| return getModule().getTargetTriple(); |
| } |
| |
| /// Set the Module's target triple. |
| void setTargetTriple(StringRef Triple) { |
| getModule().setTargetTriple(Triple); |
| } |
| |
| /// Get the number of symbols |
| uint32_t getSymbolCount() { |
| return _symbols.size(); |
| } |
| |
| /// Get the attributes for a symbol at the specified index. |
| lto_symbol_attributes getSymbolAttributes(uint32_t index) { |
| if (index < _symbols.size()) |
| return lto_symbol_attributes(_symbols[index].attributes); |
| return lto_symbol_attributes(0); |
| } |
| |
| /// Get the name of the symbol at the specified index. |
| const char *getSymbolName(uint32_t index) { |
| if (index < _symbols.size()) |
| return _symbols[index].name; |
| return nullptr; |
| } |
| |
| /// Get the number of dependent libraries |
| uint32_t getDependentLibraryCount() { |
| return _deplibs.size(); |
| } |
| |
| /// Get the dependent library at the specified index. |
| const char *getDependentLibrary(uint32_t index) { |
| if (index < _deplibs.size()) |
| return _deplibs[index]; |
| return nullptr; |
| } |
| |
| /// Get the number of linker options |
| uint32_t getLinkerOptCount() { |
| return _linkeropts.size(); |
| } |
| |
| /// Get the linker option at the specified index. |
| const char *getLinkerOpt(uint32_t index) { |
| if (index < _linkeropts.size()) |
| return _linkeropts[index]; |
| return nullptr; |
| } |
| |
| const std::vector<const char*> &getAsmUndefinedRefs() { |
| return _asm_undefines; |
| } |
| |
| private: |
| /// Parse metadata from the module |
| // FIXME: it only parses "Linker Options" metadata at the moment |
| void parseMetadata(); |
| |
| /// Parse the symbols from the module and model-level ASM and add them to |
| /// either the defined or undefined lists. |
| bool parseSymbols(std::string &errMsg); |
| |
| /// Add a symbol which isn't defined just yet to a list to be resolved later. |
| void addPotentialUndefinedSymbol(const object::BasicSymbolRef &Sym, |
| bool isFunc); |
| |
| /// Add a defined symbol to the list. |
| void addDefinedSymbol(const char *Name, const GlobalValue *def, |
| bool isFunction); |
| |
| /// Add a data symbol as defined to the list. |
| void addDefinedDataSymbol(const object::BasicSymbolRef &Sym); |
| void addDefinedDataSymbol(const char*Name, const GlobalValue *v); |
| |
| /// Add a function symbol as defined to the list. |
| void addDefinedFunctionSymbol(const object::BasicSymbolRef &Sym); |
| void addDefinedFunctionSymbol(const char *Name, const Function *F); |
| |
| /// Add a global symbol from module-level ASM to the defined list. |
| void addAsmGlobalSymbol(const char *, lto_symbol_attributes scope); |
| |
| /// Add a global symbol from module-level ASM to the undefined list. |
| void addAsmGlobalSymbolUndef(const char *); |
| |
| /// Parse i386/ppc ObjC class data structure. |
| void addObjCClass(const GlobalVariable *clgv); |
| |
| /// Parse i386/ppc ObjC category data structure. |
| void addObjCCategory(const GlobalVariable *clgv); |
| |
| /// Parse i386/ppc ObjC class list data structure. |
| void addObjCClassRef(const GlobalVariable *clgv); |
| |
| /// Get string that the data pointer points to. |
| bool objcClassNameFromExpression(const Constant *c, std::string &name); |
| |
| /// Create an LTOModule (private version). N.B. This method takes ownership of |
| /// the buffer. |
| static LTOModule *makeLTOModule(std::unique_ptr<MemoryBuffer> Buffer, |
| TargetOptions options, std::string &errMsg); |
| }; |
| } |
| #endif // LTO_MODULE_H |