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92 lines
3.9 KiB
C++
92 lines
3.9 KiB
C++
//===-- llvm/Bytecode/Reader.h - Reader for VM bytecode files ---*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This functionality is implemented by the lib/Bytecode/Reader library.
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// This library is used to read VM bytecode files from an iostream.
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//
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// Note that performance of this library is _crucial_ for performance of the
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// JIT type applications, so we have designed the bytecode format to support
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// quick reading.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_BYTECODE_READER_H
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#define LLVM_BYTECODE_READER_H
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#include "llvm/System/Path.h"
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#include "llvm/ModuleProvider.h"
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#include "llvm/Module.h"
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#include <string>
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namespace llvm {
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// Forward declare the handler class
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class BytecodeHandler;
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/// getBytecodeModuleProvider - lazy function-at-a-time loading from a file
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///
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ModuleProvider *getBytecodeModuleProvider(
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const std::string &Filename, ///< Name of file to be read
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BytecodeHandler* H = 0 ///< Optional handler for reader events
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);
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/// getBytecodeBufferModuleProvider - lazy function-at-a-time loading from a
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/// buffer
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///
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ModuleProvider *getBytecodeBufferModuleProvider(const unsigned char *Buffer,
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unsigned BufferSize,
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const std::string &ModuleID="",
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BytecodeHandler* H = 0);
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/// @brief Parse the given bytecode file
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Module* ParseBytecodeFile(const std::string &Filename,
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std::string *ErrorStr = 0);
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/// @brief Parse a given bytecode buffer
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Module* ParseBytecodeBuffer(const unsigned char *Buffer,
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unsigned BufferSize,
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const std::string &ModuleID = "",
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std::string *ErrorStr = 0);
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/// This function will read only the necessary parts of a bytecode file in order
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/// to determine the list of dependent libraries encoded within it. The \p
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/// deplibs parameter will contain a vector of strings of the bytecode module's
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/// dependent libraries.
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/// @returns true on success, false otherwise
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/// @brief Get the list of dependent libraries from a bytecode file.
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bool GetBytecodeDependentLibraries(const std::string &fileName,
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Module::LibraryListType& deplibs);
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/// This function will read only the necessary parts of a bytecode file in order
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/// to obtain a list of externally visible global symbols that the bytecode
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/// module defines. This is used for archiving and linking when only the list
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/// of symbols the module defines is needed.
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/// @returns true on success, false otherwise
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/// @brief Get a bytecode file's externally visibile defined global symbols.
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bool GetBytecodeSymbols(const sys::Path& fileName,
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std::vector<std::string>& syms);
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/// This function will read only the necessary parts of a bytecode buffer in
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/// order to obtain a list of externally visible global symbols that the
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/// bytecode module defines. This is used for archiving and linking when only
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/// the list of symbols the module defines is needed and the bytecode is
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/// already in memory.
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/// @returns the ModuleProvider on success, 0 if the bytecode can't be parsed
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/// @brief Get a bytecode file's externally visibile defined global symbols.
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ModuleProvider* GetBytecodeSymbols(
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const unsigned char*Buffer, ///< The buffer to be parsed
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unsigned Length, ///< The length of \p Buffer
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const std::string& ModuleID, ///< An identifier for the module
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std::vector<std::string>& symbols ///< The symbols defined in the module
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);
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} // End llvm namespace
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#endif
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