//
// 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 file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
#ifndef LLVM_SYSTEM_PATH_H
#define LLVM_SYSTEM_PATH_H
+#include "llvm/ADT/StringRef.h"
#include "llvm/System/TimeValue.h"
-#include "llvm/System/IncludeFile.h"
#include <set>
#include <string>
#include <vector>
-#include <iosfwd>
namespace llvm {
namespace sys {
/// platform independent and eliminates many of the unix-specific fields.
/// However, to support llvm-ar, the mode, user, and group fields are
/// retained. These pertain to unix security and may not have a meaningful
- /// value on non-Unix platforms. However, the fileSize and modTime fields
- /// should always be applicable on all platforms. The structure is
- /// filled in by the Path::getFileStatus method.
+ /// value on non-Unix platforms. However, the other fields should
+ /// always be applicable on all platforms. The structure is filled in by
+ /// the PathWithStatus class.
/// @brief File status structure
class FileStatus {
public:
FileStatus() : fileSize(0), modTime(0,0), mode(0777), user(999),
group(999), uniqueID(0), isDir(false), isFile(false) { }
-
+
TimeValue getTimestamp() const { return modTime; }
uint64_t getSize() const { return fileSize; }
uint32_t getMode() const { return mode; }
uint32_t getUser() const { return user; }
uint32_t getGroup() const { return group; }
- uint32_t getUniqueID() const { return uniqueID; }
+ uint64_t getUniqueID() const { return uniqueID; }
};
/// This class provides an abstraction for the path to a file or directory
/// @brief Construct a path to the system library directory
static void GetSystemLibraryPaths(std::vector<sys::Path>& Paths);
- /// Construct a vector of sys::Path that contains the "standard" bytecode
+ /// Construct a vector of sys::Path that contains the "standard" bitcode
/// library paths suitable for linking into an llvm program. This function
/// *must* return the value of LLVM_LIB_SEARCH_PATH as well as the value
/// of LLVM_LIBDIR. It also must provide the System library paths as
/// returned by GetSystemLibraryPaths.
/// @see GetSystemLibraryPaths
- /// @brief Construct a list of directories in which bytecode could be
+ /// @brief Construct a list of directories in which bitcode could be
/// found.
- static void GetBytecodeLibraryPaths(std::vector<sys::Path>& Paths);
+ static void GetBitcodeLibraryPaths(std::vector<sys::Path>& Paths);
/// Find the path to a library using its short name. Use the system
/// dependent library paths to locate the library.
/// @brief Construct a path to the current user's "home" directory
static Path GetUserHomeDirectory();
+ /// Construct a path to the current directory for the current process.
+ /// @returns The current working directory.
+ /// @brief Returns the current working directory.
+ static Path GetCurrentDirectory();
+
/// Return the suffix commonly used on file names that contain a shared
/// object, shared archive, or dynamic link library. Such files are
/// linked at runtime into a process and their code images are shared
/// between processes.
/// @returns The dynamic link library suffix for the current platform.
/// @brief Return the dynamic link library suffix.
- static std::string GetDLLSuffix();
+ static StringRef GetDLLSuffix();
+
+ /// GetMainExecutable - Return the path to the main executable, given the
+ /// value of argv[0] from program startup and the address of main itself.
+ /// In extremis, this function may fail and return an empty path.
+ static Path GetMainExecutable(const char *argv0, void *MainAddr);
/// This is one of the very few ways in which a path can be constructed
/// with a syntactically invalid name. The only *legal* invalid name is an
/// provided so that they can be used to indicate null or error results in
/// other lib/System functionality.
/// @brief Construct an empty (and invalid) path.
- Path() : path(), status(0) {}
- ~Path() { delete status; }
+ Path() : path() {}
+ Path(const Path &that) : path(that.path) {}
- /// This constructor will accept a std::string as a path. No checking is
- /// done on this path to determine if it is valid. To determine validity
- /// of the path, use the isValid method.
+ /// This constructor will accept a char* or std::string as a path. No
+ /// checking is done on this path to determine if it is valid. To
+ /// determine validity of the path, use the isValid method.
/// @param p The path to assign.
/// @brief Construct a Path from a string.
- explicit Path(const std::string& p) : path(p), status(0) {}
+ explicit Path(StringRef p);
+
+ /// This constructor will accept a character range as a path. No checking
+ /// is done on this path to determine if it is valid. To determine
+ /// validity of the path, use the isValid method.
+ /// @param StrStart A pointer to the first character of the path name
+ /// @param StrLen The length of the path name at StrStart
+ /// @brief Construct a Path from a string.
+ Path(const char *StrStart, unsigned StrLen);
/// @}
/// @name Operators
return *this;
}
+ /// Makes a copy of \p that to \p this.
+ /// @param that A StringRef denoting the path
+ /// @returns \p this
+ /// @brief Assignment Operator
+ Path &operator=(StringRef that);
+
/// Compares \p this Path with \p that Path for equality.
/// @returns true if \p this and \p that refer to the same thing.
/// @brief Equality Operator
- bool operator==(const Path &that) const {
- return 0 == path.compare(that.path);
- }
+ bool operator==(const Path &that) const;
/// Compares \p this Path with \p that Path for inequality.
/// @returns true if \p this and \p that refer to different things.
/// @brief Inequality Operator
- bool operator!=(const Path &that) const {
- return 0 != path.compare(that.path);
- }
+ bool operator!=(const Path &that) const { return !(*this == that); }
/// Determines if \p this Path is less than \p that Path. This is required
/// so that Path objects can be placed into ordered collections (e.g.
/// the std::string::compare method.
/// @returns true if \p this path is lexicographically less than \p that.
/// @brief Less Than Operator
- bool operator<(const Path& that) const {
- return 0 > path.compare(that.path);
- }
+ bool operator<(const Path& that) const;
/// @}
/// @name Path Accessors
/// @brief Determine if a path is syntactically valid or not.
bool isValid() const;
- /// This function determines if the contents of the path name are
- /// empty. That is, the path has a zero length. This does NOT determine if
- /// if the file is empty. Use the getSize method for that.
+ /// This function determines if the contents of the path name are empty.
+ /// That is, the path name has a zero length. This does NOT determine if
+ /// if the file is empty. To get the length of the file itself, Use the
+ /// PathWithStatus::getFileStatus() method and then the getSize() method
+ /// on the returned FileStatus object.
/// @returns true iff the path is empty.
/// @brief Determines if the path name is empty (invalid).
bool isEmpty() const { return path.empty(); }
- /// This function returns the current contents of the path as a
- /// std::string. This allows the underlying path string to be manipulated.
- /// @returns std::string containing the path name.
- /// @brief Returns the path as a std::string.
- const std::string &toString() const { return path; }
-
- /// This function returns the last component of the path name. The last
+ /// This function returns the last component of the path name. The last
/// component is the file or directory name occuring after the last
/// directory separator. If no directory separator is present, the entire
/// path name is returned (i.e. same as toString).
- /// @returns std::string containing the last component of the path name.
+ /// @returns StringRef containing the last component of the path name.
/// @brief Returns the last component of the path name.
- std::string getLast() const;
+ StringRef getLast() const;
/// This function strips off the path and suffix of the file or directory
/// name and returns just the basename. For example /a/foo.bar would cause
/// this function to return "foo".
- /// @returns std::string containing the basename of the path
+ /// @returns StringRef containing the basename of the path
/// @brief Get the base name of the path
- std::string getBasename() const;
+ StringRef getBasename() const;
+
+ /// This function strips off the suffix of the path beginning with the
+ /// path separator ('/' on Unix, '\' on Windows) and returns the result.
+ StringRef getDirname() const;
+
+ /// This function strips off the path and basename(up to and
+ /// including the last dot) of the file or directory name and
+ /// returns just the suffix. For example /a/foo.bar would cause
+ /// this function to return "bar".
+ /// @returns StringRef containing the suffix of the path
+ /// @brief Get the suffix of the path
+ StringRef getSuffix() const;
/// Obtain a 'C' string for the path name.
/// @returns a 'C' string containing the path name.
/// @brief Returns the path as a C string.
- const char *const c_str() const { return path.c_str(); }
+ const char *c_str() const { return path.c_str(); }
+ const std::string &str() const { return path; }
+
+
+ /// size - Return the length in bytes of this path name.
+ size_t size() const { return path.size(); }
+
+ /// empty - Returns true if the path is empty.
+ unsigned empty() const { return path.empty(); }
/// @}
/// @name Disk Accessors
/// @{
public:
- /// This function determines if the path name in this object references
- /// the root (top level directory) of the file system. The details of what
- /// is considered the "root" may vary from system to system so this method
- /// will do the necessary checking.
- /// @returns true iff the path name references the root directory.
- /// @brief Determines if the path references the root directory.
- bool isRootDirectory() const;
-
/// This function determines if the path name is absolute, as opposed to
- /// relative.
- /// @breif Determine if the path is absolute.
+ /// relative.
+ /// @brief Determine if the path is absolute.
bool isAbsolute() const;
+ /// This function determines if the path name is absolute, as opposed to
+ /// relative.
+ /// @brief Determine if the path is absolute.
+ static bool isAbsolute(const char *NameStart, unsigned NameLen);
+
/// This function opens the file associated with the path name provided by
/// the Path object and reads its magic number. If the magic number at the
/// start of the file matches \p magic, true is returned. In all other
/// cases (file not found, file not accessible, etc.) it returns false.
/// @returns true if the magic number of the file matches \p magic.
/// @brief Determine if file has a specific magic number
- bool hasMagicNumber(const std::string& magic) const;
+ bool hasMagicNumber(StringRef magic) const;
/// This function retrieves the first \p len bytes of the file associated
/// with \p this. These bytes are returned as the "magic number" in the
bool isArchive() const;
/// This function determines if the path name in the object references an
- /// LLVM Bytecode file by looking at its magic number.
+ /// LLVM Bitcode file by looking at its magic number.
/// @returns true if the file starts with the magic number for LLVM
- /// bytecode files.
- /// @brief Determine if the path references a bytecode file.
- bool isBytecodeFile() const;
+ /// bitcode files.
+ /// @brief Determine if the path references a bitcode file.
+ bool isBitcodeFile() const;
/// This function determines if the path name in the object references a
/// native Dynamic Library (shared library, shared object) by looking at
/// the file's magic number. The Path object must reference a file, not a
/// directory.
- /// @return strue if the file starts with the magid number for a native
+ /// @returns true if the file starts with the magic number for a native
/// shared library.
- /// @brief Determine if the path reference a dynamic library.
+ /// @brief Determine if the path references a dynamic library.
bool isDynamicLibrary() const;
+ /// This function determines if the path name in the object references a
+ /// native object file by looking at it's magic number. The term object
+ /// file is defined as "an organized collection of separate, named
+ /// sequences of binary data." This covers the obvious file formats such
+ /// as COFF and ELF, but it also includes llvm ir bitcode, archives,
+ /// libraries, etc...
+ /// @returns true if the file starts with the magic number for an object
+ /// file.
+ /// @brief Determine if the path references an object file.
+ bool isObjectFile() const;
+
/// This function determines if the path name references an existing file
/// or directory in the file system.
/// @returns true if the pathname references an existing file or
/// the file system.
bool exists() const;
+ /// This function determines if the path name refences an
+ /// existing directory.
+ /// @returns true if the pathname references an existing directory.
+ /// @brief Determins if the path is a directory in the file system.
+ bool isDirectory() const;
+
/// This function determines if the path name references a readable file
/// or directory in the file system. This function checks for
/// the existence and readability (by the current program) of the file
/// in the file system.
bool canWrite() const;
+ /// This function checks that what we're trying to work only on a regular
+ /// file. Check for things like /dev/null, any block special file, or
+ /// other things that aren't "regular" regular files.
+ /// @returns true if the file is S_ISREG.
+ /// @brief Determines if the file is a regular file
+ bool isRegularFile() const;
+
/// This function determines if the path name references an executable
/// file in the file system. This function checks for the existence and
/// executability (by the current program) of the file.
std::string* ErrMsg ///< Optional place to return an error message.
) const;
- /// This function returns status information about the file. The type of
- /// path (file or directory) is updated to reflect the actual contents
- /// of the file system. This returns false on success, or true on error
- /// and fills in the specified error string if specified.
- /// @brief Get file status.
- bool getFileStatus(
- FileStatus &Status, ///< The resulting file status
- bool forceUpdate = false, ///< Force an update from the file system
- std::string *Error = 0 ///< Optional place to return an error msg.
- ) const;
-
/// @}
/// @name Path Mutators
/// @{
/// Path object takes on the path value of \p unverified_path
/// @returns true if the path was set, false otherwise.
/// @param unverified_path The path to be set in Path object.
- /// @brief Set a full path from a std::string
- bool set(const std::string& unverified_path);
+ /// @brief Set a full path from a StringRef
+ bool set(StringRef unverified_path);
/// One path component is removed from the Path. If only one component is
/// present in the path, the Path object becomes empty. If the Path object
/// needed.
/// @returns false if the path component could not be added.
/// @brief Appends one path component to the Path.
- bool appendComponent( const std::string& component );
+ bool appendComponent(StringRef component);
/// A period and the \p suffix are appended to the end of the pathname.
/// The precondition for this function is that the Path reference a file
/// become invalid for the host operating system, false is returned.
/// @returns false if the suffix could not be added, true if it was.
/// @brief Adds a period and the \p suffix to the end of the pathname.
- bool appendSuffix(const std::string& suffix);
+ bool appendSuffix(StringRef suffix);
/// The suffix of the filename is erased. The suffix begins with and
/// includes the last . character in the filename after the last directory
/// @brief Make the current path name unique in the file system.
bool makeUnique( bool reuse_current /*= true*/, std::string* ErrMsg );
+ /// The current Path name is made absolute by prepending the
+ /// current working directory if necessary.
+ void makeAbsolute();
+
/// @}
/// @name Disk Mutators
/// @{
/// created. The created directory will have no entries.
/// @returns true if the directory could not be created, false otherwise
/// @brief Create the directory this Path refers to.
- bool createDirectoryOnDisk(
- bool create_parents = false, ///< Determines whether non-existent
- ///< directory components other than the last one (the "parents")
+ bool createDirectoryOnDisk(
+ bool create_parents = false, ///< Determines whether non-existent
+ ///< directory components other than the last one (the "parents")
///< are created or not.
std::string* ErrMsg = 0 ///< Optional place to put error messages.
);
/// file is created. Note that this will both change the Path object
/// *and* create the corresponding file. This function will ensure that
/// the newly generated temporary file name is unique in the file system.
- /// @returns true if the file couldn't be created, false otherwise.
+ /// @returns true if the file couldn't be created, false otherwise.
/// @brief Create a unique temporary file
bool createTemporaryFileOnDisk(
- bool reuse_current = false, ///< When set to true, this parameter
- ///< indicates that if the current file name does not exist then
+ bool reuse_current = false, ///< When set to true, this parameter
+ ///< indicates that if the current file name does not exist then
///< it will be used without modification.
std::string* ErrMsg = 0 ///< Optional place to put error messages
);
/// directory, recursively. If the Path refers to a file, the
/// \p destroy_contents parameter is ignored.
/// @param destroy_contents Indicates whether the contents of a destroyed
+ /// @param Err An optional string to receive an error message.
/// directory should also be destroyed (recursively).
/// @returns false if the file/directory was destroyed, true on error.
/// @brief Removes the file or directory from the filesystem.
bool eraseFromDisk(bool destroy_contents = false,
std::string *Err = 0) const;
+
+
+ /// MapInFilePages - This is a low level system API to map in the file
+ /// that is currently opened as FD into the current processes' address
+ /// space for read only access. This function may return null on failure
+ /// or if the system cannot provide the following constraints:
+ /// 1) The pages must be valid after the FD is closed, until
+ /// UnMapFilePages is called.
+ /// 2) Any padding after the end of the file must be zero filled, if
+ /// present.
+ /// 3) The pages must be contiguous.
+ ///
+ /// This API is not intended for general use, clients should use
+ /// MemoryBuffer::getFile instead.
+ static const char *MapInFilePages(int FD, uint64_t FileSize);
+
+ /// UnMapFilePages - Free pages mapped into the current process by
+ /// MapInFilePages.
+ ///
+ /// This API is not intended for general use, clients should use
+ /// MemoryBuffer::getFile instead.
+ static void UnMapFilePages(const char *Base, uint64_t FileSize);
+
/// @}
/// @name Data
/// @{
- private:
+ protected:
+ // Our win32 implementation relies on this string being mutable.
mutable std::string path; ///< Storage for the path name.
- mutable FileStatus *status; ///< Status information.
+
+
+ /// @}
+ };
+
+ /// This class is identical to Path class except it allows you to obtain the
+ /// file status of the Path as well. The reason for the distinction is one of
+ /// efficiency. First, the file status requires additional space and the space
+ /// is incorporated directly into PathWithStatus without an additional malloc.
+ /// Second, obtaining status information is an expensive operation on most
+ /// operating systems so we want to be careful and explicity about where we
+ /// allow this operation in LLVM.
+ /// @brief Path with file status class.
+ class PathWithStatus : public Path {
+ /// @name Constructors
+ /// @{
+ public:
+ /// @brief Default constructor
+ PathWithStatus() : Path(), status(), fsIsValid(false) {}
+
+ /// @brief Copy constructor
+ PathWithStatus(const PathWithStatus &that)
+ : Path(static_cast<const Path&>(that)), status(that.status),
+ fsIsValid(that.fsIsValid) {}
+
+ /// This constructor allows construction from a Path object
+ /// @brief Path constructor
+ PathWithStatus(const Path &other)
+ : Path(other), status(), fsIsValid(false) {}
+
+ /// This constructor will accept a char* or std::string as a path. No
+ /// checking is done on this path to determine if it is valid. To
+ /// determine validity of the path, use the isValid method.
+ /// @brief Construct a Path from a string.
+ explicit PathWithStatus(
+ StringRef p ///< The path to assign.
+ ) : Path(p), status(), fsIsValid(false) {}
+
+ /// This constructor will accept a character range as a path. No checking
+ /// is done on this path to determine if it is valid. To determine
+ /// validity of the path, use the isValid method.
+ /// @brief Construct a Path from a string.
+ explicit PathWithStatus(
+ const char *StrStart, ///< Pointer to the first character of the path
+ unsigned StrLen ///< Length of the path.
+ ) : Path(StrStart, StrLen), status(), fsIsValid(false) {}
+
+ /// Makes a copy of \p that to \p this.
+ /// @returns \p this
+ /// @brief Assignment Operator
+ PathWithStatus &operator=(const PathWithStatus &that) {
+ static_cast<Path&>(*this) = static_cast<const Path&>(that);
+ status = that.status;
+ fsIsValid = that.fsIsValid;
+ return *this;
+ }
+
+ /// Makes a copy of \p that to \p this.
+ /// @returns \p this
+ /// @brief Assignment Operator
+ PathWithStatus &operator=(const Path &that) {
+ static_cast<Path&>(*this) = static_cast<const Path&>(that);
+ fsIsValid = false;
+ return *this;
+ }
+
+ /// @}
+ /// @name Methods
+ /// @{
+ public:
+ /// This function returns status information about the file. The type of
+ /// path (file or directory) is updated to reflect the actual contents
+ /// of the file system.
+ /// @returns 0 on failure, with Error explaining why (if non-zero)
+ /// @returns a pointer to a FileStatus structure on success.
+ /// @brief Get file status.
+ const FileStatus *getFileStatus(
+ bool forceUpdate = false, ///< Force an update from the file system
+ std::string *Error = 0 ///< Optional place to return an error msg.
+ ) const;
+
+ /// @}
+ /// @name Data
+ /// @{
+ private:
+ mutable FileStatus status; ///< Status information.
+ mutable bool fsIsValid; ///< Whether we've obtained it or not
/// @}
};
/// This enumeration delineates the kinds of files that LLVM knows about.
enum LLVMFileType {
- UnknownFileType = 0, ///< Unrecognized file
- BytecodeFileType = 1, ///< Uncompressed bytecode file
- CompressedBytecodeFileType = 2, ///< Compressed bytecode file
- ArchiveFileType = 3 ///< ar style archive file
+ Unknown_FileType = 0, ///< Unrecognized file
+ Bitcode_FileType, ///< Bitcode file
+ Archive_FileType, ///< ar style archive file
+ ELF_Relocatable_FileType, ///< ELF Relocatable object file
+ ELF_Executable_FileType, ///< ELF Executable image
+ ELF_SharedObject_FileType, ///< ELF dynamically linked shared lib
+ ELF_Core_FileType, ///< ELF core image
+ Mach_O_Object_FileType, ///< Mach-O Object file
+ Mach_O_Executable_FileType, ///< Mach-O Executable
+ Mach_O_FixedVirtualMemorySharedLib_FileType, ///< Mach-O Shared Lib, FVM
+ Mach_O_Core_FileType, ///< Mach-O Core File
+ Mach_O_PreloadExectuable_FileType, ///< Mach-O Preloaded Executable
+ Mach_O_DynamicallyLinkedSharedLib_FileType, ///< Mach-O dynlinked shared lib
+ Mach_O_DynamicLinker_FileType, ///< The Mach-O dynamic linker
+ Mach_O_Bundle_FileType, ///< Mach-O Bundle file
+ Mach_O_DynamicallyLinkedSharedLibStub_FileType, ///< Mach-O Shared lib stub
+ COFF_FileType ///< COFF object file or lib
};
/// This utility function allows any memory block to be examined in order
/// @returns true if an error occurs, false otherwise
/// @brief Copy one file to another.
bool CopyFile(const Path& Dest, const Path& Src, std::string* ErrMsg);
-}
-std::ostream& operator<<(std::ostream& strm, const sys::Path& aPath);
+ /// This is the OS-specific path separator: a colon on Unix or a semicolon
+ /// on Windows.
+ extern const char PathSeparator;
+}
}
-FORCE_DEFINING_FILE_TO_BE_LINKED(SystemPath)
#endif
projects / oota-llvm.git / blobdiff