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remove bytecode headers

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36885 91177308-0d34-0410-b5e6-96231b3b80d8
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Chris Lattner 2007-05-06 19:47:36 +00:00
parent 663d7ddf63
commit 4f40b75b01
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125
include/llvm/Bytecode/Analyzer.h
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//===-- llvm/Bytecode/Analyzer.h - Analyzer for Bytecode files --*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Reid Spencer and is distributed under the
// University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This functionality is implemented by the lib/Bytecode/Reader library.
// It is used to read VM bytecode files from a file or memory buffer
// and print out a diagnostic analysis of the contents of the file. It is
// intended for three uses: (a) understanding the bytecode format, (b) ensuring
// correctness of bytecode format, (c) statistical analysis of generated
// bytecode files.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_BYTECODE_ANALYZER_H
#define LLVM_BYTECODE_ANALYZER_H
#include "llvm/Bytecode/Format.h"
#include "llvm/Bytecode/Reader.h"
#include <string>
#include <map>
#include <iosfwd>
namespace llvm {
// Forward declarations
class Function;
class Module;
/// This structure is used to contain the output of the Bytecode Analysis
/// library. It simply contains fields to hold each item of the analysis
/// results.
/// @brief Bytecode Analysis results structure
struct BytecodeAnalysis {
std::string ModuleId; ///< Identification of the module
unsigned version; ///< The version number of the bytecode file
unsigned byteSize; ///< The size of the bytecode file in bytes
unsigned numTypes; ///< The number of types
unsigned numValues; ///< The number of values
unsigned numBlocks; ///< The number of *bytecode* blocks
unsigned numFunctions; ///< The number of functions defined
unsigned numConstants; ///< The number of constants
unsigned numGlobalVars; ///< The number of global variables
unsigned numInstructions; ///< The number of instructions in all functions
unsigned numBasicBlocks; ///< The number of BBs in all functions
unsigned numOperands; ///< The number of BBs in all functions
unsigned numCmpctnTables; ///< The number of compaction tables
unsigned numSymTab; ///< The number of symbol tables
unsigned numAlignment; ///< The number of alignment bytes
unsigned numLibraries; ///< The number of dependent libraries
unsigned libSize; ///< Number of bytes taken by dep libs.
unsigned maxTypeSlot; ///< The maximum slot number for types
unsigned maxValueSlot; ///< The maximum slot number for values
double fileDensity; ///< Density of file (bytes/definition)
///< This is the density of the bytecode file. It is the ratio of
///< the number of bytes to the number of definitions in the file. Smaller
///< numbers mean the file is more compact (denser). Larger numbers mean
///< the file is more sparse.
double globalsDensity; ///< density of global defs (bytes/definition)
double functionDensity; ///< Average density of functions (bytes/function)
unsigned instructionSize; ///< Size of instructions in bytes
unsigned longInstructions;///< Number of instructions > 4 bytes
typedef std::map<BytecodeFormat::BytecodeBlockIdentifiers,unsigned>
BlockSizeMap;
BlockSizeMap BlockSizes;
/// A structure that contains various pieces of information related to
/// an analysis of a single function.
struct BytecodeFunctionInfo {
std::string description; ///< Function type description
std::string name; ///< Name of function if it has one
unsigned byteSize; ///< The size of the function in bytecode bytes
unsigned numInstructions; ///< The number of instructions in the function
unsigned numBasicBlocks; ///< The number of basic blocks in the function
unsigned numPhis; ///< Number of Phi Nodes in Instructions
unsigned numOperands; ///< The number of operands in the function
double density; ///< Density of function
unsigned instructionSize; ///< Size of instructions in bytes
unsigned longInstructions;///< Number of instructions > 4 bytes
};
/// A mapping of function slot numbers to the collected information about
/// the function.
std::map<const Function*,BytecodeFunctionInfo> FunctionInfo;
/// The content of the progressive verification
std::string VerifyInfo;
/// Flags for what should be done
bool detailedResults; ///< If true, FunctionInfo has contents
bool progressiveVerify; ///< If true, VerifyInfo has contents
};
/// This function is the main entry point into the bytecode analysis library. It
/// allows you to simply provide a \p filename and storage for the \p Results
/// that will be filled in with the analysis results.
/// @brief Analyze contents of a bytecode File
Module* AnalyzeBytecodeFile(
const std::string& Filename, ///< The name of the bytecode file to read
BytecodeAnalysis& Results, ///< The results of the analysis
BCDecompressor_t *BCDC = 0, ///< Optional decompressor to use.
std::string* ErrorStr = 0, ///< Errors, if any.
std::ostream* output = 0 ///< Stream for dump output, if wanted
);
/// This function prints the contents of rhe BytecodeAnalysis structure in
/// a human legible form.
/// @brief Print BytecodeAnalysis structure to an ostream
void PrintBytecodeAnalysis(BytecodeAnalysis& bca, std::ostream& Out );
/// @brief std::ostream inserter for BytecodeAnalysis structure
inline std::ostream& operator<<(std::ostream& Out, BytecodeAnalysis& bca ) {
PrintBytecodeAnalysis(bca,Out);
return Out;
}
} // End llvm namespace
#endif

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include/llvm/Bytecode/Archive.h
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//===-- llvm/Bytecode/Archive.h - LLVM Bytecode Archive ---------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Reid Spencer and is distributed under the
// University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This header file declares the Archive and ArchiveMember classes that provide
// manipulation of LLVM Archive files. The implementation is provided by the
// lib/Bytecode/Archive library. This library is used to read and write
// archive (*.a) files that contain LLVM bytecode files (or others).
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_BYTECODE_ARCHIVE_H
#define LLVM_BYTECODE_ARCHIVE_H
#include "llvm/ADT/ilist"
#include "llvm/System/Path.h"
#include "llvm/System/MappedFile.h"
#include "llvm/Support/Compressor.h"
#include <map>
#include <set>
#include <fstream>
namespace llvm {
// Forward declare classes
class ModuleProvider; // From VMCore
class Module; // From VMCore
class Archive; // Declared below
class ArchiveMemberHeader; // Internal implementation class
typedef size_t BCDecompressor_t(const char *, size_t, char*&, std::string*);
/// This class is the main class manipulated by users of the Archive class. It
/// holds information about one member of the Archive. It is also the element
/// stored by the Archive's ilist, the Archive's main abstraction. Because of
/// the special requirements of archive files, users are not permitted to
/// construct ArchiveMember instances. You should obtain them from the methods
/// of the Archive class instead.
/// @brief This class represents a single archive member.
class ArchiveMember {
/// @name Types
/// @{
public:
/// These flags are used internally by the archive member to specify various
/// characteristics of the member. The various "is" methods below provide
/// access to the flags. The flags are not user settable.
enum Flags {
CompressedFlag = 1, ///< Member is a normal compressed file
SVR4SymbolTableFlag = 2, ///< Member is a SVR4 symbol table
BSD4SymbolTableFlag = 4, ///< Member is a BSD4 symbol table
LLVMSymbolTableFlag = 8, ///< Member is an LLVM symbol table
BytecodeFlag = 16, ///< Member is uncompressed bytecode
CompressedBytecodeFlag = 32, ///< Member is compressed bytecode
HasPathFlag = 64, ///< Member has a full or partial path
HasLongFilenameFlag = 128, ///< Member uses the long filename syntax
StringTableFlag = 256 ///< Member is an ar(1) format string table
};
/// @}
/// @name Accessors
/// @{
public:
/// @returns the parent Archive instance
/// @brief Get the archive associated with this member
Archive* getArchive() const { return parent; }
/// @returns the path to the Archive's file
/// @brief Get the path to the archive member
const sys::Path& getPath() const { return path; }
/// The "user" is the owner of the file per Unix security. This may not
/// have any applicability on non-Unix systems but is a required component
/// of the "ar" file format.
/// @brief Get the user associated with this archive member.
unsigned getUser() const { return info.getUser(); }
/// The "group" is the owning group of the file per Unix security. This
/// may not have any applicability on non-Unix systems but is a required
/// component of the "ar" file format.
/// @brief Get the group associated with this archive member.
unsigned getGroup() const { return info.getGroup(); }
/// The "mode" specifies the access permissions for the file per Unix
/// security. This may not have any applicabiity on non-Unix systems but is
/// a required component of the "ar" file format.
/// @brief Get the permission mode associated with this archive member.
unsigned getMode() const { return info.getMode(); }
/// This method returns the time at which the archive member was last
/// modified when it was not in the archive.
/// @brief Get the time of last modification of the archive member.
sys::TimeValue getModTime() const { return info.getTimestamp(); }
/// @returns the size of the archive member in bytes.
/// @brief Get the size of the archive member.
uint64_t getSize() const { return info.getSize(); }
/// This method returns the total size of the archive member as it
/// appears on disk. This includes the file content, the header, the
/// long file name if any, and the padding.
/// @brief Get total on-disk member size.
unsigned getMemberSize() const;
/// This method will return a pointer to the in-memory content of the
/// archive member, if it is available. If the data has not been loaded
/// into memory, the return value will be null.
/// @returns a pointer to the member's data.
/// @brief Get the data content of the archive member
const void* getData() const { return data; }
/// This method determines if the member is a regular compressed file. Note
/// that compressed bytecode files will yield "false" for this method.
/// @see isCompressedBytecode()
/// @returns true iff the archive member is a compressed regular file.
/// @brief Determine if the member is a compressed regular file.
bool isCompressed() const { return flags&CompressedFlag; }
/// @returns true iff the member is a SVR4 (non-LLVM) symbol table
/// @brief Determine if this member is a SVR4 symbol table.
bool isSVR4SymbolTable() const { return flags&SVR4SymbolTableFlag; }
/// @returns true iff the member is a BSD4.4 (non-LLVM) symbol table
/// @brief Determine if this member is a BSD4.4 symbol table.
bool isBSD4SymbolTable() const { return flags&BSD4SymbolTableFlag; }
/// @returns true iff the archive member is the LLVM symbol table
/// @brief Determine if this member is the LLVM symbol table.
bool isLLVMSymbolTable() const { return flags&LLVMSymbolTableFlag; }
/// @returns true iff the archive member is the ar(1) string table
/// @brief Determine if this member is the ar(1) string table.
bool isStringTable() const { return flags&StringTableFlag; }
/// @returns true iff the archive member is an uncompressed bytecode file.
/// @brief Determine if this member is a bytecode file.
bool isBytecode() const { return flags&BytecodeFlag; }
/// @returns true iff the archive member is a compressed bytecode file.
/// @brief Determine if the member is a compressed bytecode file.
bool isCompressedBytecode() const { return flags&CompressedBytecodeFlag;}
/// @returns true iff the file name contains a path (directory) component.
/// @brief Determine if the member has a path
bool hasPath() const { return flags&HasPathFlag; }
/// Long filenames are an artifact of the ar(1) file format which allows
/// up to sixteen characters in its header and doesn't allow a path
/// separator character (/). To avoid this, a "long format" member name is
/// allowed that doesn't have this restriction. This method determines if
/// that "long format" is used for this member.
/// @returns true iff the file name uses the long form
/// @brief Determin if the member has a long file name
bool hasLongFilename() const { return flags&HasLongFilenameFlag; }
/// This method returns the status info (like Unix stat(2)) for the archive
/// member. The status info provides the file's size, permissions, and
/// modification time. The contents of the Path::StatusInfo structure, other
/// than the size and modification time, may not have utility on non-Unix
/// systems.
/// @returns the status info for the archive member
/// @brief Obtain the status info for the archive member
const sys::FileStatus &getFileStatus() const { return info; }
/// This method causes the archive member to be replaced with the contents
/// of the file specified by \p File. The contents of \p this will be
/// updated to reflect the new data from \p File. The \p File must exist and
/// be readable on entry to this method.
/// @returns true if an error occurred, false otherwise
/// @brief Replace contents of archive member with a new file.
bool replaceWith(const sys::Path &aFile, std::string* ErrMsg);
/// @}
/// @name ilist methods - do not use
/// @{
public:
const ArchiveMember *getNext() const { return next; }
const ArchiveMember *getPrev() const { return prev; }
ArchiveMember *getNext() { return next; }
ArchiveMember *getPrev() { return prev; }
void setPrev(ArchiveMember* p) { prev = p; }
void setNext(ArchiveMember* n) { next = n; }
/// @}
/// @name Data
/// @{
private:
ArchiveMember* next; ///< Pointer to next archive member
ArchiveMember* prev; ///< Pointer to previous archive member
Archive* parent; ///< Pointer to parent archive
sys::PathWithStatus path; ///< Path of file containing the member
sys::FileStatus info; ///< Status info (size,mode,date)
unsigned flags; ///< Flags about the archive member
const void* data; ///< Data for the member
/// @}
/// @name Constructors
/// @{
public:
/// The default constructor is only used by the Archive's iplist when it
/// constructs the list's sentry node.
ArchiveMember();
private:
/// Used internally by the Archive class to construct an ArchiveMember.
/// The contents of the ArchiveMember are filled out by the Archive class.
ArchiveMember(Archive *PAR);
// So Archive can construct an ArchiveMember
friend class llvm::Archive;
/// @}
};
/// This class defines the interface to LLVM Archive files. The Archive class
/// presents the archive file as an ilist of ArchiveMember objects. The members
/// can be rearranged in any fashion either by directly editing the ilist or by
/// using editing methods on the Archive class (recommended). The Archive
/// class also provides several ways of accessing the archive file for various
/// purposes such as editing and linking. Full symbol table support is provided
/// for loading only those files that resolve symbols. Note that read
/// performance of this library is _crucial_ for performance of JIT type
/// applications and the linkers. Consequently, the implementation of the class
/// is optimized for reading.
class Archive {
/// @name Types
/// @{
public:
/// This is the ilist type over which users may iterate to examine
/// the contents of the archive
/// @brief The ilist type of ArchiveMembers that Archive contains.
typedef iplist<ArchiveMember> MembersList;
/// @brief Forward mutable iterator over ArchiveMember
typedef MembersList::iterator iterator;
/// @brief Forward immutable iterator over ArchiveMember
typedef MembersList::const_iterator const_iterator;
/// @brief Reverse mutable iterator over ArchiveMember
typedef std::reverse_iterator<iterator> reverse_iterator;
/// @brief Reverse immutable iterator over ArchiveMember
typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
/// @brief The in-memory version of the symbol table
typedef std::map<std::string,unsigned> SymTabType;
/// @}
/// @name ilist accessor methods
/// @{
public:
inline iterator begin() { return members.begin(); }
inline const_iterator begin() const { return members.begin(); }
inline iterator end () { return members.end(); }
inline const_iterator end () const { return members.end(); }
inline reverse_iterator rbegin() { return members.rbegin(); }
inline const_reverse_iterator rbegin() const { return members.rbegin(); }
inline reverse_iterator rend () { return members.rend(); }
inline const_reverse_iterator rend () const { return members.rend(); }
inline unsigned size() const { return members.size(); }
inline bool empty() const { return members.empty(); }
inline const ArchiveMember& front() const { return members.front(); }
inline ArchiveMember& front() { return members.front(); }
inline const ArchiveMember& back() const { return members.back(); }
inline ArchiveMember& back() { return members.back(); }
/// @}
/// @name ilist mutator methods
/// @{
public:
/// This method splices a \p src member from an archive (possibly \p this),
/// to a position just before the member given by \p dest in \p this. When
/// the archive is written, \p src will be written in its new location.
/// @brief Move a member to a new location
inline void splice(iterator dest, Archive& arch, iterator src)
{ return members.splice(dest,arch.members,src); }
/// This method erases a \p target member from the archive. When the
/// archive is written, it will no longer contain \p target. The associated
/// ArchiveMember is deleted.
/// @brief Erase a member.
inline iterator erase(iterator target) { return members.erase(target); }
/// @}
/// @name Constructors
/// @{
public:
/// Create an empty archive file and associate it with the \p Filename. This
/// method does not actually create the archive disk file. It creates an
/// empty Archive object. If the writeToDisk method is called, the archive
/// file \p Filename will be created at that point, with whatever content
/// the returned Archive object has at that time.
/// @returns An Archive* that represents the new archive file.
/// @brief Create an empty Archive.
static Archive* CreateEmpty(
const sys::Path& Filename ///< Name of the archive to (eventually) create.
);
/// Open an existing archive and load its contents in preparation for
/// editing. After this call, the member ilist is completely populated based
/// on the contents of the archive file. You should use this form of open if
/// you intend to modify the archive or traverse its contents (e.g. for
/// printing).
/// @brief Open and load an archive file
static Archive* OpenAndLoad(
const sys::Path& filePath, ///< The file path to open and load
std::string* ErrorMessage ///< An optional error string
);
/// This method opens an existing archive file from \p Filename and reads in
/// its symbol table without reading in any of the archive's members. This
/// reduces both I/O and cpu time in opening the archive if it is to be used
/// solely for symbol lookup (e.g. during linking). The \p Filename must
/// exist and be an archive file or an exception will be thrown. This form
/// of opening the archive is intended for read-only operations that need to
/// locate members via the symbol table for link editing. Since the archve
/// members are not read by this method, the archive will appear empty upon
/// return. If editing operations are performed on the archive, they will
/// completely replace the contents of the archive! It is recommended that
/// if this form of opening the archive is used that only the symbol table
/// lookup methods (getSymbolTable, findModuleDefiningSymbol, and
/// findModulesDefiningSymbols) be used.
/// @throws std::string if an error occurs opening the file
/// @returns an Archive* that represents the archive file.
/// @brief Open an existing archive and load its symbols.
static Archive* OpenAndLoadSymbols(
const sys::Path& Filename, ///< Name of the archive file to open
std::string* ErrorMessage=0 ///< An optional error string
);
/// This destructor cleans up the Archive object, releases all memory, and
/// closes files. It does nothing with the archive file on disk. If you
/// haven't used the writeToDisk method by the time the destructor is
/// called, all changes to the archive will be lost.
/// @throws std::string if an error occurs
/// @brief Destruct in-memory archive
~Archive();
/// @}
/// @name Accessors
/// @{
public:
/// @returns the path to the archive file.
/// @brief Get the archive path.
const sys::Path& getPath() { return archPath; }
/// This method is provided so that editing methods can be invoked directly
/// on the Archive's iplist of ArchiveMember. However, it is recommended
/// that the usual STL style iterator interface be used instead.
/// @returns the iplist of ArchiveMember
/// @brief Get the iplist of the members
MembersList& getMembers() { return members; }
/// This method allows direct query of the Archive's symbol table. The
/// symbol table is a std::map of std::string (the symbol) to unsigned (the
/// file offset). Note that for efficiency reasons, the offset stored in
/// the symbol table is not the actual offset. It is the offset from the
/// beginning of the first "real" file member (after the symbol table). Use
/// the getFirstFileOffset() to obtain that offset and add this value to the
/// offset in the symbol table to obtain the real file offset. Note that
/// there is purposefully no interface provided by Archive to look up
/// members by their offset. Use the findModulesDefiningSymbols and
/// findModuleDefiningSymbol methods instead.
/// @returns the Archive's symbol table.
/// @brief Get the archive's symbol table
const SymTabType& getSymbolTable() { return symTab; }
/// This method returns the offset in the archive file to the first "real"
/// file member. Archive files, on disk, have a signature and might have a
/// symbol table that precedes the first actual file member. This method
/// allows you to determine what the size of those fields are.
/// @returns the offset to the first "real" file member in the archive.
/// @brief Get the offset to the first "real" file member in the archive.
unsigned getFirstFileOffset() { return firstFileOffset; }
/// This method will scan the archive for bytecode modules, interpret them
/// and return a vector of the instantiated modules in \p Modules. If an
/// error occurs, this method will return true. If \p ErrMessage is not null
/// and an error occurs, \p *ErrMessage will be set to a string explaining
/// the error that occurred.
/// @returns true if an error occurred
/// @brief Instantiate all the bytecode modules located in the archive
bool getAllModules(std::vector<Module*>& Modules, std::string* ErrMessage);
/// This accessor looks up the \p symbol in the archive's symbol table and
/// returns the associated module that defines that symbol. This method can
/// be called as many times as necessary. This is handy for linking the
/// archive into another module based on unresolved symbols. Note that the
/// ModuleProvider returned by this accessor should not be deleted by the
/// caller. It is managed internally by the Archive class. It is possible
/// that multiple calls to this accessor will return the same ModuleProvider
/// instance because the associated module defines multiple symbols.
/// @returns The ModuleProvider* found or null if the archive does not
/// contain a module that defines the \p symbol.
/// @brief Look up a module by symbol name.
ModuleProvider* findModuleDefiningSymbol(
const std::string& symbol, ///< Symbol to be sought
std::string* ErrMessage ///< Error message storage, if non-zero
);
/// This method is similar to findModuleDefiningSymbol but allows lookup of
/// more than one symbol at a time. If \p symbols contains a list of
/// undefined symbols in some module, then calling this method is like
/// making one complete pass through the archive to resolve symbols but is
/// more efficient than looking at the individual members. Note that on
/// exit, the symbols resolved by this method will be removed from \p
/// symbols to ensure they are not re-searched on a subsequent call. If
/// you need to retain the list of symbols, make a copy.
/// @brief Look up multiple symbols in the archive.
bool findModulesDefiningSymbols(
std::set<std::string>& symbols, ///< Symbols to be sought
std::set<ModuleProvider*>& modules, ///< The modules matching \p symbols
std::string* ErrMessage ///< Error msg storage, if non-zero
);
/// This method determines whether the archive is a properly formed llvm
/// bytecode archive. It first makes sure the symbol table has been loaded
/// and has a non-zero size. If it does, then it is an archive. If not,
/// then it tries to load all the bytecode modules of the archive. Finally,
/// it returns whether it was successfull.
/// @returns true if the archive is a proper llvm bytecode archive
/// @brief Determine whether the archive is a proper llvm bytecode archive.
bool isBytecodeArchive();
/// @}
/// @name Mutators
/// @{
public:
/// This method is the only way to get the archive written to disk. It
/// creates or overwrites the file specified when \p this was created
/// or opened. The arguments provide options for writing the archive. If
/// \p CreateSymbolTable is true, the archive is scanned for bytecode files
/// and a symbol table of the externally visible function and global
/// variable names is created. If \p TruncateNames is true, the names of the
/// archive members will have their path component stripped and the file
/// name will be truncated at 15 characters. If \p Compress is specified,
/// all archive members will be compressed before being written. If
/// \p PrintSymTab is true, the symbol table will be printed to std::cout.
/// @returns true if an error occurred, \p error set to error message
/// @returns false if the writing succeeded.
/// @brief Write (possibly modified) archive contents to disk
bool writeToDisk(
bool CreateSymbolTable=false, ///< Create Symbol table
bool TruncateNames=false, ///< Truncate the filename to 15 chars
bool Compress=false, ///< Compress files
std::string* ErrMessage=0 ///< If non-null, where error msg is set
);
/// This method adds a new file to the archive. The \p filename is examined
/// to determine just enough information to create an ArchiveMember object
/// which is then inserted into the Archive object's ilist at the location
/// given by \p where.
/// @returns true if an error occured, false otherwise
/// @brief Add a file to the archive.
bool addFileBefore(
const sys::Path& filename, ///< The file to be added
iterator where, ///< Insertion point
std::string* ErrMsg ///< Optional error message location
);
/// @}
/// @name Implementation
/// @{
protected:
/// @brief Construct an Archive for \p filename and optionally map it
/// into memory.
Archive(const sys::Path& filename, BCDecompressor_t *BCDC =
Compressor::decompressToNewBuffer);
/// @param error Set to address of a std::string to get error messages
/// @returns false on error
/// @brief Parse the symbol table at \p data.
bool parseSymbolTable(const void* data,unsigned len,std::string* error);
/// @returns A fully populated ArchiveMember or 0 if an error occurred.
/// @brief Parse the header of a member starting at \p At
ArchiveMember* parseMemberHeader(
const char*&At, ///< The pointer to the location we're parsing
const char*End, ///< The pointer to the end of the archive
std::string* error ///< Optional error message catcher
);
/// @param error Set to address of a std::string to get error messages
/// @returns false on error
/// @brief Check that the archive signature is correct
bool checkSignature(std::string* ErrMessage);
/// @param error Set to address of a std::string to get error messages
/// @returns false on error
/// @brief Load the entire archive.
bool loadArchive(std::string* ErrMessage);
/// @param error Set to address of a std::string to get error messages
/// @returns false on error
/// @brief Load just the symbol table.
bool loadSymbolTable(std::string* ErrMessage);
/// @brief Write the symbol table to an ofstream.
void writeSymbolTable(std::ofstream& ARFile);
/// Writes one ArchiveMember to an ofstream. If an error occurs, returns
/// false, otherwise true. If an error occurs and error is non-null then
/// it will be set to an error message.
/// @returns false Writing member succeeded
/// @returns true Writing member failed, \p error set to error message
bool writeMember(
const ArchiveMember& member, ///< The member to be written
std::ofstream& ARFile, ///< The file to write member onto
bool CreateSymbolTable, ///< Should symbol table be created?
bool TruncateNames, ///< Should names be truncated to 11 chars?
bool ShouldCompress, ///< Should the member be compressed?
std::string* ErrMessage ///< If non-null, place were error msg is set
);
/// @brief Fill in an ArchiveMemberHeader from ArchiveMember.
bool fillHeader(const ArchiveMember&mbr,
ArchiveMemberHeader& hdr,int sz, bool TruncateNames) const;
/// @brief Maps archive into memory
bool mapToMemory(std::string* ErrMsg);
/// @brief Frees all the members and unmaps the archive file.
void cleanUpMemory();
/// This type is used to keep track of bytecode modules loaded from the
/// symbol table. It maps the file offset to a pair that consists of the
/// associated ArchiveMember and the ModuleProvider.
/// @brief Module mapping type
typedef std::map<unsigned,std::pair<ModuleProvider*,ArchiveMember*> >
ModuleMap;
/// @}
/// @name Data
/// @{
protected:
sys::Path archPath; ///< Path to the archive file we read/write
MembersList members; ///< The ilist of ArchiveMember
sys::MappedFile* mapfile; ///< Raw Archive contents mapped into memory
const char* base; ///< Base of the memory mapped file data
SymTabType symTab; ///< The symbol table
std::string strtab; ///< The string table for long file names
unsigned symTabSize; ///< Size in bytes of symbol table
unsigned firstFileOffset; ///< Offset to first normal file.
ModuleMap modules; ///< The modules loaded via symbol lookup.
ArchiveMember* foreignST; ///< This holds the foreign symbol table.
BCDecompressor_t *Decompressor; ///< Optional decompressor
/// @}
/// @name Hidden
/// @{
private:
Archive(); ///< Do not implement
Archive(const Archive&); ///< Do not implement
Archive& operator=(const Archive&); ///< Do not implement
/// @}
};
} // End llvm namespace
#endif

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include/llvm/Bytecode/BytecodeHandler.h
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//===-- BytecodeHandler.h - Handle Bytecode Parsing Events ------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Reid Spencer and is distributed under the
// University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This header file defines the interface to the Bytecode Handler. The handler
// is called by the Bytecode Reader to obtain out-of-band parsing events for
// tasks other then LLVM IR construction.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_BYTECODE_BYTECODEHANDLER_H
#define LLVM_BYTECODE_BYTECODEHANDLER_H
#include "llvm/Module.h"
namespace llvm {
class ArrayType;
class StructType;
class PointerType;
class VectorType;
class ConstantArray;
class Module;
/// This class provides the interface for handling bytecode events during
/// reading of bytecode. The methods on this interface are invoked by the
/// BytecodeReader as it discovers the content of a bytecode stream.
/// This class provides a a clear separation of concerns between recognizing
/// the semantic units of a bytecode file (the Reader) and deciding what to do
/// with them (the Handler).
///
/// The BytecodeReader recognizes the content of the bytecode file and
/// calls the BytecodeHandler methods to let it perform additional tasks. This
/// arrangement allows Bytecode files to be read and handled for a number of
/// purposes simply by creating a subclass of BytecodeHandler. None of the
/// parsing details need to be understood, only the meaning of the calls
/// made on this interface.
///
/// @see BytecodeHandler
/// @brief Handle Bytecode Parsing Events
class BytecodeHandler {
/// @name Constructors And Operators
/// @{
public:
/// @brief Default constructor (empty)
BytecodeHandler() {}
/// @brief Virtual destructor (empty)
virtual ~BytecodeHandler();
private:
BytecodeHandler(const BytecodeHandler &); // DO NOT IMPLEMENT
void operator=(const BytecodeHandler &); // DO NOT IMPLEMENT
/// @}
/// @name Handler Methods
/// @{
public:
/// This method is called whenever the parser detects an error in the
/// bytecode formatting. It gives the handler a chance to do something
/// with the error message before the parser throws an exception to
/// terminate the parsing.
/// @brief Handle parsing errors.
virtual void handleError(const std::string& str ) {}
/// This method is called at the beginning of a parse before anything is
/// read in order to give the handler a chance to initialize.
/// @brief Handle the start of a bytecode parse
virtual void handleStart( Module* Mod, unsigned byteSize ) {}
/// This method is called at the end of a parse after everything has been
/// read in order to give the handler a chance to terminate.
/// @brief Handle the end of a bytecode parse
virtual void handleFinish() {}
/// This method is called at the start of a module to indicate that a
/// module is being parsed.
/// @brief Handle the start of a module.
virtual void handleModuleBegin(const std::string& moduleId) {}
/// This method is called at the end of a module to indicate that the module
/// previously being parsed has concluded.
/// @brief Handle the end of a module.
virtual void handleModuleEnd(
const std::string& moduleId ///< An identifier for the module
) {}
/// This method is called once the version information has been parsed. It
/// provides the information about the version of the bytecode file being
/// read.
/// @brief Handle the bytecode prolog
virtual void handleVersionInfo(
unsigned char RevisionNum ///< Byte code revision number
) {}
/// This method is called at the start of a module globals block which
/// contains the global variables and the function placeholders
virtual void handleModuleGlobalsBegin() {}
/// This method is called when a non-initialized global variable is
/// recognized. Its type, constness, and linkage type are provided.
/// @brief Handle a non-initialized global variable
virtual void handleGlobalVariable(
const Type* ElemType, ///< The type of the global variable
bool isConstant, ///< Whether the GV is constant or not
GlobalValue::LinkageTypes,///< The linkage type of the GV
GlobalValue::VisibilityTypes,///< The visibility style of the GV
unsigned SlotNum, ///< Slot number of GV
unsigned initSlot, ///< Slot number of GV's initializer (0 if none)
bool isThreadLocal ///< Whether the GV is thread local or not
) {}
virtual void handleGlobalAlias(
const Type* ElemType,
GlobalValue::LinkageTypes Linkage,
unsigned TypeSlotNum,
unsigned AliaseeSlot) { }
/// This method is called when a type list is recognized. It simply
/// provides the number of types that the list contains. The handler
/// should expect that number of calls to handleType.
/// @brief Handle a type
virtual void handleTypeList(
unsigned numEntries ///< The number of entries in the type list
) {}
/// This method is called when a new type is recognized. The type is
/// converted from the bytecode and passed to this method.
/// @brief Handle a type
virtual void handleType(
const Type* Ty ///< The type that was just recognized
) {}
/// This method is called when the function prototype for a function is
/// encountered in the module globals block.
virtual void handleFunctionDeclaration(
Function* Func ///< The function being declared
) {}
/// This method is called when a global variable is initialized with
/// its constant value. Because of forward referencing, etc. this is
/// done towards the end of the module globals block
virtual void handleGlobalInitializer(GlobalVariable*, Constant* ) {}
/// This method is called for each dependent library name found
/// in the module globals block.
virtual void handleDependentLibrary(const std::string& libName) {}
/// This method is called if the module globals has a non-empty target
/// triple
virtual void handleTargetTriple(const std::string& triple) {}
/// This method is called at the end of the module globals block.
/// @brief Handle end of module globals block.
virtual void handleModuleGlobalsEnd() {}
/// @brief Handle start of a symbol table
virtual void handleTypeSymbolTableBegin(
TypeSymbolTable* ST ///< The symbol table being filled
) {}
/// @brief Handle start of a symbol table
virtual void handleValueSymbolTableBegin(
Function* Func, ///< The function to which the ST belongs or 0 for Mod
ValueSymbolTable* ST ///< The symbol table being filled
) {}
/// @brief Handle a named type in the symbol table
virtual void handleSymbolTableType(
unsigned i, ///< The index of the type in this plane
unsigned slot, ///< Slot number of the named type
const std::string& name ///< Name of the type
) {}
/// @brief Handle a named value in the symbol table
virtual void handleSymbolTableValue(
unsigned i, ///< The index of the value in this plane
unsigned slot, ///< Slot number of the named value
const char *name, unsigned NameLen ///< Name of the value.
) {}
/// @brief Handle the end of a value symbol table
virtual void handleTypeSymbolTableEnd() {}
/// @brief Handle the end of a type symbol table
virtual void handleValueSymbolTableEnd() {}
/// @brief Handle the beginning of a function body
virtual void handleFunctionBegin(
Function* Func, ///< The function being defined
unsigned Size ///< The size (in bytes) of the function's bytecode
) {}
/// @brief Handle the end of a function body
virtual void handleFunctionEnd(
Function* Func ///< The function whose definition has just finished.
) {}
/// @brief Handle the beginning of a basic block
virtual void handleBasicBlockBegin(
unsigned blocknum ///< The block number of the block
) {}
/// This method is called for each instruction that is parsed.
/// @returns true if the instruction is a block terminating instruction
/// @brief Handle an instruction
virtual bool handleInstruction(
unsigned Opcode, ///< Opcode of the instruction
const Type* iType, ///< Instruction type
unsigned *Operands, unsigned NumOps, ///< Vector of slot # operands
Instruction *Inst, ///< The resulting instruction
unsigned Length ///< Length of instruction in bc bytes
) { return false; }
/// @brief Handle the end of a basic block
virtual void handleBasicBlockEnd(
unsigned blocknum ///< The block number of the block just finished
) {}
/// @brief Handle start of global constants block.
virtual void handleGlobalConstantsBegin() {}
/// @brief Handle a constant expression
virtual void handleConstantExpression(
unsigned Opcode, ///< Opcode of primary expression operator
Constant**Args, unsigned NumArgs, ///< expression args
Constant* C ///< The constant value
) {}
/// @brief Handle a constant array
virtual void handleConstantArray(
const ArrayType* AT, ///< Type of the array
Constant**ElementSlots, unsigned NumElts,///< Slot nums for array values
unsigned TypeSlot, ///< Slot # of type
Constant* Val ///< The constant value
) {}
/// @brief Handle a constant structure
virtual void handleConstantStruct(
const StructType* ST, ///< Type of the struct
Constant**ElementSlots, unsigned NumElts,///< Slot nums for struct values
Constant* Val ///< The constant value
) {}
/// @brief Handle a constant packed
virtual void handleConstantVector(
const VectorType* PT, ///< Type of the array
Constant**ElementSlots, unsigned NumElts,///< Slot nums for packed values
unsigned TypeSlot, ///< Slot # of type
Constant* Val ///< The constant value
) {}
/// @brief Handle a constant pointer
virtual void handleConstantPointer(
const PointerType* PT, ///< Type of the pointer
unsigned Slot, ///< Slot num of initializer value
GlobalValue* GV ///< Referenced global value
) {}
/// @brief Handle a constant strings (array special case)
virtual void handleConstantString(
const ConstantArray* CA ///< Type of the string array
) {}
/// @brief Handle a primitive constant value
virtual void handleConstantValue(
Constant * c ///< The constant just defined
) {}
/// @brief Handle the end of the global constants
virtual void handleGlobalConstantsEnd() {}
/// @brief Handle an alignment event
virtual void handleAlignment(
unsigned numBytes ///< The number of bytes added for alignment
) {}
/// @brief Handle a bytecode block
virtual void handleBlock(
unsigned BType, ///< The type of block
const unsigned char* StartPtr, ///< The start of the block
unsigned Size ///< The size of the block
) {}
/// @}
};
}
#endif

53
include/llvm/Bytecode/Format.h
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//===-- llvm/Bytecode/Format.h - VM bytecode file format info ---*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This header defines intrinsic constants that are useful to libraries that
// need to hack on bytecode files directly, like the reader and writer.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_BYTECODE_FORMAT_H
#define LLVM_BYTECODE_FORMAT_H
namespace llvm {
class BytecodeFormat { // Throw the constants into a poorman's namespace...
BytecodeFormat(); // do not implement
public:
/// The the identifier and the size of the block are encoded into a single
/// vbr_uint32 with 5 bits for the block identifier and 27-bits for block
/// length. This limits blocks to a maximum of
/// 128MBytes of data, and block types to 31 which should be sufficient
/// for the foreseeable usage. Because the values of block identifiers MUST
/// fit within 5 bits (values 1-31), this enumeration is used to ensure
/// smaller values are used for 1.3 and subsequent bytecode versions.
/// @brief The block number identifiers used in LLVM 1.3 bytecode
/// format.
enum BytecodeBlockIdentifiers {
Reserved_DoNotUse = 0, ///< Zero value is forbidden, do not use.
ModuleBlockID = 1, ///< Module block that contains other blocks.
FunctionBlockID = 2, ///< Function block identifier
ConstantPoolBlockID = 3, ///< Constant pool identifier
ValueSymbolTableBlockID= 4, ///< Value Symbol table identifier
ModuleGlobalInfoBlockID= 5, ///< Module global info identifier
GlobalTypePlaneBlockID = 6, ///< Global type plan identifier
InstructionListBlockID = 7, ///< All instructions in a function
//CompactionTableBlockID = 8, << Placeholder for removed block type
TypeSymbolTableBlockID = 9, ///< Value Symbol table identifier
// Not a block id, just used to count them
NumberOfBlockIDs
};
};
} // End llvm namespace
#endif

86
include/llvm/Bytecode/Reader.h
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//===-- llvm/Bytecode/Reader.h - Reader for VM bytecode files ---*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This functionality is implemented by the lib/Bytecode/Reader library.
// This library is used to read VM bytecode files from an iostream.
//
// Note that performance of this library is _crucial_ for performance of the
// JIT type applications, so we have designed the bytecode format to support
// quick reading.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_BYTECODE_READER_H
#define LLVM_BYTECODE_READER_H
#include "llvm/ModuleProvider.h"
#include "llvm/Module.h"
#include "llvm/Support/Compressor.h"
#include "llvm/System/Path.h"
namespace llvm {
// Forward declare the handler class
class BytecodeHandler;
typedef size_t BCDecompressor_t(const char *, size_t, char*&, std::string*);
/// This function returns a ModuleProvider that can be used to do lazy
/// function-at-a-time loading from a bytecode file.
/// @returns NULL on error
/// @returns ModuleProvider* if successful
/// @brief Get a ModuleProvide for a bytecode file.
ModuleProvider *getBytecodeModuleProvider(
const std::string &Filename, ///< Name of file to be read
BCDecompressor_t *BCDC = Compressor::decompressToNewBuffer,
std::string* ErrMsg = 0, ///< Optional error message holder
BytecodeHandler* H = 0 ///< Optional handler for reader events
);
/// This function returns a ModuleProvider that can be used to do lazy
/// function function-at-a-time loading from a bytecode buffer.
/// @returns NULL on error
/// @returns ModuleProvider* if successful
/// @brief Get a ModuleProvider for a bytecode buffer.
ModuleProvider *getBytecodeBufferModuleProvider(
const unsigned char *Buffer, ///< Start of buffer to parse
unsigned BufferSize, ///< Size of the buffer
const std::string &ModuleID, ///< Name to give the module
BCDecompressor_t *BCDC = Compressor::decompressToNewBuffer,
std::string* ErrMsg = 0, ///< Optional place to return an error message
BytecodeHandler* H = 0 ///< Optional handler for reader events
);
/// This is the main interface to bytecode parsing. It opens the file specified
/// by \p Filename and parses the entire file, returing the corresponding Module
/// object if successful.
/// @returns NULL on error
/// @returns the module corresponding to the bytecode file, if successful
/// @brief Parse the given bytecode file
Module* ParseBytecodeFile(
const std::string &Filename, ///< Name of file to parse
BCDecompressor_t *BCDC = Compressor::decompressToNewBuffer,
std::string *ErrMsg = 0 ///< Optional place to return an error message
);
/// Parses a bytecode buffer specified by \p Buffer and \p BufferSize.
/// @returns NULL on error
/// @returns the module corresponding to the bytecode buffer, if successful
/// @brief Parse a given bytecode buffer
Module* ParseBytecodeBuffer(
const unsigned char *Buffer, ///< Start of buffer to parse
unsigned BufferSize, ///< Size of the buffer
const std::string &ModuleID="", ///< Name to give the module
BCDecompressor_t *BCDC = Compressor::decompressToNewBuffer,
std::string *ErrMsg = 0 ///< Optional place to return an error message
);
} // End llvm namespace
#endif

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include/llvm/Bytecode/WriteBytecodePass.h
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//===- llvm/Bytecode/WriteBytecodePass.h - Bytecode Writer Pass -*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines a simple pass to write the working module to a file after
// pass processing is completed.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_BYTECODE_WRITEBYTECODEPASS_H
#define LLVM_BYTECODE_WRITEBYTECODEPASS_H
#include "llvm/Pass.h"
#include "llvm/Bytecode/Writer.h"
#include "llvm/Support/Streams.h"
namespace llvm {
class WriteBytecodePass : public ModulePass {
OStream *Out; // ostream to print on
bool DeleteStream;
bool CompressFile;
public:
static char ID; // Pass identification, replacement for typeid
WriteBytecodePass()
: ModulePass((intptr_t) &ID), Out(&cout), DeleteStream(false),
CompressFile(false) {}
WriteBytecodePass(OStream *o, bool DS = false, bool CF = false)
: ModulePass((intptr_t) &ID), Out(o), DeleteStream(DS), CompressFile(CF) {}
inline ~WriteBytecodePass() {
if (DeleteStream) delete Out;
}
bool runOnModule(Module &M) {
WriteBytecodeToFile(&M, *Out, CompressFile);
return false;
}
};
} // End llvm namespace
#endif

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include/llvm/Bytecode/Writer.h
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//===-- llvm/Bytecode/Writer.h - Writer for VM bytecode files ---*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This functionality is implemented by the lib/Bytecode/Writer library.
// This library is used to write bytecode files to an iostream.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_BYTECODE_WRITER_H
#define LLVM_BYTECODE_WRITER_H
#include "llvm/Support/Streams.h"
namespace llvm {
class Module;
/// WriteBytecodeToFile - Write the specified module to the specified output
/// stream. If compress is set to true, try to use compression when writing
/// out the file. This can never fail if M is a well-formed module.
void WriteBytecodeToFile(const Module *M, OStream &Out,
bool compress = false);
} // End llvm namespace
#endif