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Bytecode file. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17502 91177308-0d34-0410-b5e6-96231b3b80d8
88 lines
3.5 KiB
C++
88 lines
3.5 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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/// Read bytecode files from the specfied archive (.a) file, convert them
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/// to Module* and provide them in the \p Objects argument. If an error
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/// occurs, ErrorStr (if non-null) will be set to a string explaining
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/// the error.
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/// @return true on error, false on success.
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/// @brief Get a vector of Module* from a bytecode archive file
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bool ReadArchiveFile(const std::string &Filename,
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std::vector<Module*> &Objects,
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std::string *ErrorStr = 0);
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} // End llvm namespace
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#endif
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