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This function adds an extra path argument to lto_module_create_from_memory. The path argument will be passed to makeBuffer to make sure the MemoryBuffer has a name and the created module has a module identifier. This is mainly for emitting warning messages from the linker. When we emit warning message on a module, we can use the module identifier. rdar://15985737 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201114 91177308-0d34-0410-b5e6-96231b3b80d8
232 lines
8.3 KiB
C++
232 lines
8.3 KiB
C++
//===-LTOModule.h - LLVM Link Time Optimizer ------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares the LTOModule class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LTO_MODULE_H
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#define LTO_MODULE_H
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#include "llvm-c/lto.h"
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#include "llvm/ADT/OwningPtr.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/IR/Mangler.h"
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#include "llvm/IR/Module.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCObjectFileInfo.h"
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#include "llvm/Target/TargetMachine.h"
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#include <string>
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#include <vector>
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// Forward references to llvm classes.
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namespace llvm {
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class Function;
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class GlobalValue;
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class MemoryBuffer;
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class TargetOptions;
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class Value;
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}
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//===----------------------------------------------------------------------===//
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/// LTOModule - C++ class which implements the opaque lto_module_t type.
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///
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struct LTOModule {
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private:
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typedef llvm::StringMap<uint8_t> StringSet;
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struct NameAndAttributes {
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const char *name;
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uint32_t attributes;
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bool isFunction;
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const llvm::GlobalValue *symbol;
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};
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llvm::OwningPtr<llvm::Module> _module;
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llvm::OwningPtr<llvm::TargetMachine> _target;
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llvm::MCObjectFileInfo ObjFileInfo;
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StringSet _linkeropt_strings;
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std::vector<const char *> _deplibs;
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std::vector<const char *> _linkeropts;
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std::vector<NameAndAttributes> _symbols;
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// _defines and _undefines only needed to disambiguate tentative definitions
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StringSet _defines;
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llvm::StringMap<NameAndAttributes> _undefines;
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std::vector<const char*> _asm_undefines;
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llvm::MCContext _context;
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// Use mangler to add GlobalPrefix to names to match linker names.
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llvm::Mangler _mangler;
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LTOModule(llvm::Module *m, llvm::TargetMachine *t);
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public:
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/// isBitcodeFile - Returns 'true' if the file or memory contents is LLVM
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/// bitcode.
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static bool isBitcodeFile(const void *mem, size_t length);
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static bool isBitcodeFile(const char *path);
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/// isBitcodeFileForTarget - Returns 'true' if the file or memory contents
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/// is LLVM bitcode for the specified triple.
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static bool isBitcodeFileForTarget(const void *mem,
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size_t length,
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const char *triplePrefix);
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static bool isBitcodeFileForTarget(const char *path,
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const char *triplePrefix);
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/// makeLTOModule - Create an LTOModule. N.B. These methods take ownership
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/// of the buffer. The caller must have initialized the Targets, the
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/// TargetMCs, the AsmPrinters, and the AsmParsers by calling:
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///
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/// InitializeAllTargets();
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/// InitializeAllTargetMCs();
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/// InitializeAllAsmPrinters();
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/// InitializeAllAsmParsers();
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static LTOModule *makeLTOModule(const char* path,
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llvm::TargetOptions options,
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std::string &errMsg);
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static LTOModule *makeLTOModule(int fd, const char *path,
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size_t size, llvm::TargetOptions options,
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std::string &errMsg);
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static LTOModule *makeLTOModule(int fd, const char *path,
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size_t map_size,
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off_t offset, llvm::TargetOptions options,
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std::string& errMsg);
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static LTOModule *makeLTOModule(const void *mem, size_t length,
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llvm::TargetOptions options,
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std::string &errMsg,
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llvm::StringRef path = "");
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/// getTargetTriple - Return the Module's target triple.
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const char *getTargetTriple() {
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return _module->getTargetTriple().c_str();
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}
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/// setTargetTriple - Set the Module's target triple.
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void setTargetTriple(const char *triple) {
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_module->setTargetTriple(triple);
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}
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/// getSymbolCount - Get the number of symbols
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uint32_t getSymbolCount() {
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return _symbols.size();
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}
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/// getSymbolAttributes - Get the attributes for a symbol at the specified
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/// index.
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lto_symbol_attributes getSymbolAttributes(uint32_t index) {
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if (index < _symbols.size())
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return lto_symbol_attributes(_symbols[index].attributes);
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return lto_symbol_attributes(0);
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}
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/// getSymbolName - Get the name of the symbol at the specified index.
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const char *getSymbolName(uint32_t index) {
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if (index < _symbols.size())
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return _symbols[index].name;
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return NULL;
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}
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/// getDependentLibraryCount - Get the number of dependent libraries
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uint32_t getDependentLibraryCount() {
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return _deplibs.size();
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}
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/// getDependentLibrary - Get the dependent library at the specified index.
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const char *getDependentLibrary(uint32_t index) {
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if (index < _deplibs.size())
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return _deplibs[index];
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return NULL;
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}
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/// getLinkerOptCount - Get the number of linker options
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uint32_t getLinkerOptCount() {
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return _linkeropts.size();
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}
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/// getLinkerOpt - Get the linker option at the specified index.
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const char *getLinkerOpt(uint32_t index) {
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if (index < _linkeropts.size())
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return _linkeropts[index];
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return NULL;
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}
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/// getLLVVMModule - Return the Module.
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llvm::Module *getLLVVMModule() { return _module.get(); }
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/// getAsmUndefinedRefs -
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const std::vector<const char*> &getAsmUndefinedRefs() {
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return _asm_undefines;
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}
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private:
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/// parseMetadata - Parse metadata from the module
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// FIXME: it only parses "Linker Options" metadata at the moment
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void parseMetadata();
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/// parseSymbols - Parse the symbols from the module and model-level ASM and
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/// add them to either the defined or undefined lists.
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bool parseSymbols(std::string &errMsg);
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/// addPotentialUndefinedSymbol - Add a symbol which isn't defined just yet
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/// to a list to be resolved later.
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void addPotentialUndefinedSymbol(const llvm::GlobalValue *dcl, bool isFunc);
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/// addDefinedSymbol - Add a defined symbol to the list.
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void addDefinedSymbol(const llvm::GlobalValue *def, bool isFunction);
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/// addDefinedFunctionSymbol - Add a function symbol as defined to the list.
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void addDefinedFunctionSymbol(const llvm::Function *f);
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/// addDefinedDataSymbol - Add a data symbol as defined to the list.
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void addDefinedDataSymbol(const llvm::GlobalValue *v);
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/// addAsmGlobalSymbols - Add global symbols from module-level ASM to the
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/// defined or undefined lists.
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bool addAsmGlobalSymbols(std::string &errMsg);
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/// addAsmGlobalSymbol - Add a global symbol from module-level ASM to the
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/// defined list.
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void addAsmGlobalSymbol(const char *, lto_symbol_attributes scope);
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/// addAsmGlobalSymbolUndef - Add a global symbol from module-level ASM to
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/// the undefined list.
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void addAsmGlobalSymbolUndef(const char *);
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/// addObjCClass - Parse i386/ppc ObjC class data structure.
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void addObjCClass(const llvm::GlobalVariable *clgv);
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/// addObjCCategory - Parse i386/ppc ObjC category data structure.
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void addObjCCategory(const llvm::GlobalVariable *clgv);
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/// addObjCClassRef - Parse i386/ppc ObjC class list data structure.
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void addObjCClassRef(const llvm::GlobalVariable *clgv);
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/// objcClassNameFromExpression - Get string that the data pointer points
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/// to.
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bool objcClassNameFromExpression(const llvm::Constant* c, std::string &name);
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/// isTargetMatch - Returns 'true' if the memory buffer is for the specified
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/// target triple.
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static bool isTargetMatch(llvm::MemoryBuffer *memBuffer,
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const char *triplePrefix);
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/// makeLTOModule - Create an LTOModule (private version). N.B. This
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/// method takes ownership of the buffer.
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static LTOModule *makeLTOModule(llvm::MemoryBuffer *buffer,
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llvm::TargetOptions options,
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std::string &errMsg);
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/// Create a MemoryBuffer from a memory range with an optional name.
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static llvm::MemoryBuffer *makeBuffer(const void *mem, size_t length,
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llvm::StringRef name = "");
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};
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#endif // LTO_MODULE_H
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