| //===- llvm/Support/Windows/PathV2.inc - Windows Path Impl ------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file implements the Windows specific implementation of the PathV2 API. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| //===----------------------------------------------------------------------===// |
| //=== WARNING: Implementation here must contain only generic Windows code that |
| //=== is guaranteed to work on *all* Windows variants. |
| //===----------------------------------------------------------------------===// |
| |
| #include "Windows.h" |
| #include <fcntl.h> |
| #include <io.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| |
| #undef max |
| |
| // MinGW doesn't define this. |
| #ifndef _ERRNO_T_DEFINED |
| #define _ERRNO_T_DEFINED |
| typedef int errno_t; |
| #endif |
| |
| using namespace llvm; |
| |
| namespace { |
| typedef BOOLEAN (WINAPI *PtrCreateSymbolicLinkW)( |
| /*__in*/ LPCWSTR lpSymlinkFileName, |
| /*__in*/ LPCWSTR lpTargetFileName, |
| /*__in*/ DWORD dwFlags); |
| |
| PtrCreateSymbolicLinkW create_symbolic_link_api = PtrCreateSymbolicLinkW( |
| ::GetProcAddress(::GetModuleHandleA("kernel32.dll"), |
| "CreateSymbolicLinkW")); |
| |
| error_code UTF8ToUTF16(StringRef utf8, SmallVectorImpl<wchar_t> &utf16) { |
| int len = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, |
| utf8.begin(), utf8.size(), |
| utf16.begin(), 0); |
| |
| if (len == 0) |
| return windows_error(::GetLastError()); |
| |
| utf16.reserve(len + 1); |
| utf16.set_size(len); |
| |
| len = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, |
| utf8.begin(), utf8.size(), |
| utf16.begin(), utf16.size()); |
| |
| if (len == 0) |
| return windows_error(::GetLastError()); |
| |
| // Make utf16 null terminated. |
| utf16.push_back(0); |
| utf16.pop_back(); |
| |
| return error_code::success(); |
| } |
| |
| error_code UTF16ToUTF8(const wchar_t *utf16, size_t utf16_len, |
| SmallVectorImpl<char> &utf8) { |
| // Get length. |
| int len = ::WideCharToMultiByte(CP_UTF8, 0, |
| utf16, utf16_len, |
| utf8.begin(), 0, |
| NULL, NULL); |
| |
| if (len == 0) |
| return windows_error(::GetLastError()); |
| |
| utf8.reserve(len); |
| utf8.set_size(len); |
| |
| // Now do the actual conversion. |
| len = ::WideCharToMultiByte(CP_UTF8, 0, |
| utf16, utf16_len, |
| utf8.data(), utf8.size(), |
| NULL, NULL); |
| |
| if (len == 0) |
| return windows_error(::GetLastError()); |
| |
| // Make utf8 null terminated. |
| utf8.push_back(0); |
| utf8.pop_back(); |
| |
| return error_code::success(); |
| } |
| |
| error_code TempDir(SmallVectorImpl<wchar_t> &result) { |
| retry_temp_dir: |
| DWORD len = ::GetTempPathW(result.capacity(), result.begin()); |
| |
| if (len == 0) |
| return windows_error(::GetLastError()); |
| |
| if (len > result.capacity()) { |
| result.reserve(len); |
| goto retry_temp_dir; |
| } |
| |
| result.set_size(len); |
| return error_code::success(); |
| } |
| |
| bool is_separator(const wchar_t value) { |
| switch (value) { |
| case L'\\': |
| case L'/': |
| return true; |
| default: |
| return false; |
| } |
| } |
| } |
| |
| namespace llvm { |
| namespace sys { |
| namespace fs { |
| |
| error_code current_path(SmallVectorImpl<char> &result) { |
| SmallVector<wchar_t, 128> cur_path; |
| cur_path.reserve(128); |
| retry_cur_dir: |
| DWORD len = ::GetCurrentDirectoryW(cur_path.capacity(), cur_path.data()); |
| |
| // A zero return value indicates a failure other than insufficient space. |
| if (len == 0) |
| return windows_error(::GetLastError()); |
| |
| // If there's insufficient space, the len returned is larger than the len |
| // given. |
| if (len > cur_path.capacity()) { |
| cur_path.reserve(len); |
| goto retry_cur_dir; |
| } |
| |
| cur_path.set_size(len); |
| // cur_path now holds the current directory in utf-16. Convert to utf-8. |
| |
| // Find out how much space we need. Sadly, this function doesn't return the |
| // size needed unless you tell it the result size is 0, which means you |
| // _always_ have to call it twice. |
| len = ::WideCharToMultiByte(CP_UTF8, 0, |
| cur_path.data(), cur_path.size(), |
| result.data(), 0, |
| NULL, NULL); |
| |
| if (len == 0) |
| return make_error_code(windows_error(::GetLastError())); |
| |
| result.reserve(len); |
| result.set_size(len); |
| // Now do the actual conversion. |
| len = ::WideCharToMultiByte(CP_UTF8, 0, |
| cur_path.data(), cur_path.size(), |
| result.data(), result.size(), |
| NULL, NULL); |
| if (len == 0) |
| return windows_error(::GetLastError()); |
| |
| return error_code::success(); |
| } |
| |
| error_code copy_file(const Twine &from, const Twine &to, copy_option copt) { |
| // Get arguments. |
| SmallString<128> from_storage; |
| SmallString<128> to_storage; |
| StringRef f = from.toStringRef(from_storage); |
| StringRef t = to.toStringRef(to_storage); |
| |
| // Convert to utf-16. |
| SmallVector<wchar_t, 128> wide_from; |
| SmallVector<wchar_t, 128> wide_to; |
| if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec; |
| if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec; |
| |
| // Copy the file. |
| BOOL res = ::CopyFileW(wide_from.begin(), wide_to.begin(), |
| copt != copy_option::overwrite_if_exists); |
| |
| if (res == 0) |
| return windows_error(::GetLastError()); |
| |
| return error_code::success(); |
| } |
| |
| error_code create_directory(const Twine &path, bool &existed) { |
| SmallString<128> path_storage; |
| SmallVector<wchar_t, 128> path_utf16; |
| |
| if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage), |
| path_utf16)) |
| return ec; |
| |
| if (!::CreateDirectoryW(path_utf16.begin(), NULL)) { |
| error_code ec = windows_error(::GetLastError()); |
| if (ec == windows_error::already_exists) |
| existed = true; |
| else |
| return ec; |
| } else |
| existed = false; |
| |
| return error_code::success(); |
| } |
| |
| error_code create_hard_link(const Twine &to, const Twine &from) { |
| // Get arguments. |
| SmallString<128> from_storage; |
| SmallString<128> to_storage; |
| StringRef f = from.toStringRef(from_storage); |
| StringRef t = to.toStringRef(to_storage); |
| |
| // Convert to utf-16. |
| SmallVector<wchar_t, 128> wide_from; |
| SmallVector<wchar_t, 128> wide_to; |
| if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec; |
| if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec; |
| |
| if (!::CreateHardLinkW(wide_from.begin(), wide_to.begin(), NULL)) |
| return windows_error(::GetLastError()); |
| |
| return error_code::success(); |
| } |
| |
| error_code create_symlink(const Twine &to, const Twine &from) { |
| // Only do it if the function is available at runtime. |
| if (!create_symbolic_link_api) |
| return make_error_code(errc::function_not_supported); |
| |
| // Get arguments. |
| SmallString<128> from_storage; |
| SmallString<128> to_storage; |
| StringRef f = from.toStringRef(from_storage); |
| StringRef t = to.toStringRef(to_storage); |
| |
| // Convert to utf-16. |
| SmallVector<wchar_t, 128> wide_from; |
| SmallVector<wchar_t, 128> wide_to; |
| if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec; |
| if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec; |
| |
| if (!create_symbolic_link_api(wide_from.begin(), wide_to.begin(), 0)) |
| return windows_error(::GetLastError()); |
| |
| return error_code::success(); |
| } |
| |
| error_code remove(const Twine &path, bool &existed) { |
| SmallString<128> path_storage; |
| SmallVector<wchar_t, 128> path_utf16; |
| |
| file_status st; |
| if (error_code ec = status(path, st)) |
| return ec; |
| |
| if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage), |
| path_utf16)) |
| return ec; |
| |
| if (st.type() == file_type::directory_file) { |
| if (!::RemoveDirectoryW(c_str(path_utf16))) { |
| error_code ec = windows_error(::GetLastError()); |
| if (ec != windows_error::file_not_found) |
| return ec; |
| existed = false; |
| } else |
| existed = true; |
| } else { |
| if (!::DeleteFileW(c_str(path_utf16))) { |
| error_code ec = windows_error(::GetLastError()); |
| if (ec != windows_error::file_not_found) |
| return ec; |
| existed = false; |
| } else |
| existed = true; |
| } |
| |
| return error_code::success(); |
| } |
| |
| error_code rename(const Twine &from, const Twine &to) { |
| // Get arguments. |
| SmallString<128> from_storage; |
| SmallString<128> to_storage; |
| StringRef f = from.toStringRef(from_storage); |
| StringRef t = to.toStringRef(to_storage); |
| |
| // Convert to utf-16. |
| SmallVector<wchar_t, 128> wide_from; |
| SmallVector<wchar_t, 128> wide_to; |
| if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec; |
| if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec; |
| |
| error_code ec = error_code::success(); |
| for (int i = 0; i < 2000; i++) { |
| if (::MoveFileExW(wide_from.begin(), wide_to.begin(), |
| MOVEFILE_COPY_ALLOWED | MOVEFILE_REPLACE_EXISTING)) |
| return error_code::success(); |
| ec = windows_error(::GetLastError()); |
| if (ec != windows_error::access_denied) |
| break; |
| // Retry MoveFile() at ACCESS_DENIED. |
| // System scanners (eg. indexer) might open the source file when |
| // It is written and closed. |
| ::Sleep(1); |
| } |
| |
| return ec; |
| } |
| |
| error_code resize_file(const Twine &path, uint64_t size) { |
| SmallString<128> path_storage; |
| SmallVector<wchar_t, 128> path_utf16; |
| |
| if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage), |
| path_utf16)) |
| return ec; |
| |
| int fd = ::_wopen(path_utf16.begin(), O_BINARY | _O_RDWR, S_IWRITE); |
| if (fd == -1) |
| return error_code(errno, generic_category()); |
| #ifdef HAVE__CHSIZE_S |
| errno_t error = ::_chsize_s(fd, size); |
| #else |
| errno_t error = ::_chsize(fd, size); |
| #endif |
| ::close(fd); |
| return error_code(error, generic_category()); |
| } |
| |
| error_code exists(const Twine &path, bool &result) { |
| SmallString<128> path_storage; |
| SmallVector<wchar_t, 128> path_utf16; |
| |
| if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage), |
| path_utf16)) |
| return ec; |
| |
| DWORD attributes = ::GetFileAttributesW(path_utf16.begin()); |
| |
| if (attributes == INVALID_FILE_ATTRIBUTES) { |
| // See if the file didn't actually exist. |
| error_code ec = make_error_code(windows_error(::GetLastError())); |
| if (ec != windows_error::file_not_found && |
| ec != windows_error::path_not_found) |
| return ec; |
| result = false; |
| } else |
| result = true; |
| return error_code::success(); |
| } |
| |
| bool equivalent(file_status A, file_status B) { |
| assert(status_known(A) && status_known(B)); |
| return A.FileIndexHigh == B.FileIndexHigh && |
| A.FileIndexLow == B.FileIndexLow && |
| A.FileSizeHigh == B.FileSizeHigh && |
| A.FileSizeLow == B.FileSizeLow && |
| A.LastWriteTimeHigh == B.LastWriteTimeHigh && |
| A.LastWriteTimeLow == B.LastWriteTimeLow && |
| A.VolumeSerialNumber == B.VolumeSerialNumber; |
| } |
| |
| error_code equivalent(const Twine &A, const Twine &B, bool &result) { |
| file_status fsA, fsB; |
| if (error_code ec = status(A, fsA)) return ec; |
| if (error_code ec = status(B, fsB)) return ec; |
| result = equivalent(fsA, fsB); |
| return error_code::success(); |
| } |
| |
| error_code file_size(const Twine &path, uint64_t &result) { |
| SmallString<128> path_storage; |
| SmallVector<wchar_t, 128> path_utf16; |
| |
| if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage), |
| path_utf16)) |
| return ec; |
| |
| WIN32_FILE_ATTRIBUTE_DATA FileData; |
| if (!::GetFileAttributesExW(path_utf16.begin(), |
| ::GetFileExInfoStandard, |
| &FileData)) |
| return windows_error(::GetLastError()); |
| |
| result = |
| (uint64_t(FileData.nFileSizeHigh) << (sizeof(FileData.nFileSizeLow) * 8)) |
| + FileData.nFileSizeLow; |
| |
| return error_code::success(); |
| } |
| |
| static bool isReservedName(StringRef path) { |
| // This list of reserved names comes from MSDN, at: |
| // http://msdn.microsoft.com/en-us/library/aa365247%28v=vs.85%29.aspx |
| static const char *sReservedNames[] = { "nul", "con", "prn", "aux", |
| "com1", "com2", "com3", "com4", "com5", "com6", |
| "com7", "com8", "com9", "lpt1", "lpt2", "lpt3", |
| "lpt4", "lpt5", "lpt6", "lpt7", "lpt8", "lpt9" }; |
| |
| // First, check to see if this is a device namespace, which always |
| // starts with \\.\, since device namespaces are not legal file paths. |
| if (path.startswith("\\\\.\\")) |
| return true; |
| |
| // Then compare against the list of ancient reserved names |
| for (size_t i = 0; i < sizeof(sReservedNames) / sizeof(const char *); ++i) { |
| if (path.equals_lower(sReservedNames[i])) |
| return true; |
| } |
| |
| // The path isn't what we consider reserved. |
| return false; |
| } |
| |
| error_code status(const Twine &path, file_status &result) { |
| SmallString<128> path_storage; |
| SmallVector<wchar_t, 128> path_utf16; |
| |
| StringRef path8 = path.toStringRef(path_storage); |
| if (isReservedName(path8)) { |
| result = file_status(file_type::character_file); |
| return error_code::success(); |
| } |
| |
| if (error_code ec = UTF8ToUTF16(path8, path_utf16)) |
| return ec; |
| |
| DWORD attr = ::GetFileAttributesW(path_utf16.begin()); |
| if (attr == INVALID_FILE_ATTRIBUTES) |
| goto handle_status_error; |
| |
| // Handle reparse points. |
| if (attr & FILE_ATTRIBUTE_REPARSE_POINT) { |
| ScopedFileHandle h( |
| ::CreateFileW(path_utf16.begin(), |
| 0, // Attributes only. |
| FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE, |
| NULL, |
| OPEN_EXISTING, |
| FILE_FLAG_BACKUP_SEMANTICS, |
| 0)); |
| if (!h) |
| goto handle_status_error; |
| } |
| |
| if (attr & FILE_ATTRIBUTE_DIRECTORY) |
| result = file_status(file_type::directory_file); |
| else { |
| result = file_status(file_type::regular_file); |
| ScopedFileHandle h( |
| ::CreateFileW(path_utf16.begin(), |
| 0, // Attributes only. |
| FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE, |
| NULL, |
| OPEN_EXISTING, |
| FILE_FLAG_BACKUP_SEMANTICS, |
| 0)); |
| if (!h) |
| goto handle_status_error; |
| BY_HANDLE_FILE_INFORMATION Info; |
| if (!::GetFileInformationByHandle(h, &Info)) |
| goto handle_status_error; |
| result.FileIndexHigh = Info.nFileIndexHigh; |
| result.FileIndexLow = Info.nFileIndexLow; |
| result.FileSizeHigh = Info.nFileSizeHigh; |
| result.FileSizeLow = Info.nFileSizeLow; |
| result.LastWriteTimeHigh = Info.ftLastWriteTime.dwHighDateTime; |
| result.LastWriteTimeLow = Info.ftLastWriteTime.dwLowDateTime; |
| result.VolumeSerialNumber = Info.dwVolumeSerialNumber; |
| } |
| |
| return error_code::success(); |
| |
| handle_status_error: |
| error_code ec = windows_error(::GetLastError()); |
| if (ec == windows_error::file_not_found || |
| ec == windows_error::path_not_found) |
| result = file_status(file_type::file_not_found); |
| else if (ec == windows_error::sharing_violation) |
| result = file_status(file_type::type_unknown); |
| else { |
| result = file_status(file_type::status_error); |
| return ec; |
| } |
| |
| return error_code::success(); |
| } |
| |
| |
| // Modifies permissions on a file. |
| error_code permissions(const Twine &path, perms prms) { |
| #if 0 // verify code below before enabling: |
| // If the permissions bits are not trying to modify |
| // "write" permissions, there is nothing to do. |
| if (!(prms & (owner_write|group_write|others_write))) |
| return error_code::success(); |
| |
| SmallString<128> path_storage; |
| SmallVector<wchar_t, 128> path_utf16; |
| |
| if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage), |
| path_utf16)) |
| return ec; |
| |
| DWORD attributes = ::GetFileAttributesW(path_utf16.begin()); |
| |
| if (prms & add_perms) { |
| attributes &= ~FILE_ATTRIBUTE_READONLY; |
| } |
| else if (prms & remove_perms) { |
| attributes |= FILE_ATTRIBUTE_READONLY; |
| } |
| else { |
| assert(0 && "neither add_perms or remove_perms is set"); |
| } |
| |
| if ( ! ::SetFileAttributesW(path_utf16.begin(), attributes)) |
| return windows_error(::GetLastError()); |
| #endif |
| return error_code::success(); |
| } |
| |
| |
| // FIXME: mode should be used here and default to user r/w only, |
| // it currently comes in as a UNIX mode. |
| error_code unique_file(const Twine &model, int &result_fd, |
| SmallVectorImpl<char> &result_path, |
| bool makeAbsolute, unsigned mode) { |
| // Use result_path as temp storage. |
| result_path.set_size(0); |
| StringRef m = model.toStringRef(result_path); |
| |
| SmallVector<wchar_t, 128> model_utf16; |
| if (error_code ec = UTF8ToUTF16(m, model_utf16)) return ec; |
| |
| if (makeAbsolute) { |
| // Make model absolute by prepending a temp directory if it's not already. |
| bool absolute = path::is_absolute(m); |
| |
| if (!absolute) { |
| SmallVector<wchar_t, 64> temp_dir; |
| if (error_code ec = TempDir(temp_dir)) return ec; |
| // Handle c: by removing it. |
| if (model_utf16.size() > 2 && model_utf16[1] == L':') { |
| model_utf16.erase(model_utf16.begin(), model_utf16.begin() + 2); |
| } |
| model_utf16.insert(model_utf16.begin(), temp_dir.begin(), temp_dir.end()); |
| } |
| } |
| |
| // Replace '%' with random chars. From here on, DO NOT modify model. It may be |
| // needed if the randomly chosen path already exists. |
| SmallVector<wchar_t, 128> random_path_utf16; |
| |
| // Get a Crypto Provider for CryptGenRandom. |
| HCRYPTPROV HCPC; |
| if (!::CryptAcquireContextW(&HCPC, |
| NULL, |
| NULL, |
| PROV_RSA_FULL, |
| CRYPT_VERIFYCONTEXT)) |
| return windows_error(::GetLastError()); |
| ScopedCryptContext CryptoProvider(HCPC); |
| |
| retry_random_path: |
| random_path_utf16.set_size(0); |
| for (SmallVectorImpl<wchar_t>::const_iterator i = model_utf16.begin(), |
| e = model_utf16.end(); |
| i != e; ++i) { |
| if (*i == L'%') { |
| BYTE val = 0; |
| if (!::CryptGenRandom(CryptoProvider, 1, &val)) |
| return windows_error(::GetLastError()); |
| random_path_utf16.push_back("0123456789abcdef"[val & 15]); |
| } |
| else |
| random_path_utf16.push_back(*i); |
| } |
| // Make random_path_utf16 null terminated. |
| random_path_utf16.push_back(0); |
| random_path_utf16.pop_back(); |
| |
| // Make sure we don't fall into an infinite loop by constantly trying |
| // to create the parent path. |
| bool TriedToCreateParent = false; |
| |
| // Try to create + open the path. |
| retry_create_file: |
| HANDLE TempFileHandle = ::CreateFileW(random_path_utf16.begin(), |
| GENERIC_READ | GENERIC_WRITE, |
| FILE_SHARE_READ, |
| NULL, |
| // Return ERROR_FILE_EXISTS if the file |
| // already exists. |
| CREATE_NEW, |
| FILE_ATTRIBUTE_TEMPORARY, |
| NULL); |
| if (TempFileHandle == INVALID_HANDLE_VALUE) { |
| // If the file existed, try again, otherwise, error. |
| error_code ec = windows_error(::GetLastError()); |
| if (ec == windows_error::file_exists) |
| goto retry_random_path; |
| // Check for non-existing parent directories. |
| if (ec == windows_error::path_not_found && !TriedToCreateParent) { |
| TriedToCreateParent = true; |
| |
| // Create the directories using result_path as temp storage. |
| if (error_code ec = UTF16ToUTF8(random_path_utf16.begin(), |
| random_path_utf16.size(), result_path)) |
| return ec; |
| StringRef p(result_path.begin(), result_path.size()); |
| SmallString<64> dir_to_create; |
| for (path::const_iterator i = path::begin(p), |
| e = --path::end(p); i != e; ++i) { |
| path::append(dir_to_create, *i); |
| bool Exists; |
| if (error_code ec = exists(Twine(dir_to_create), Exists)) return ec; |
| if (!Exists) { |
| // If c: doesn't exist, bail. |
| if (i->endswith(":")) |
| return ec; |
| |
| SmallVector<wchar_t, 64> dir_to_create_utf16; |
| if (error_code ec = UTF8ToUTF16(dir_to_create, dir_to_create_utf16)) |
| return ec; |
| |
| // Create the directory. |
| if (!::CreateDirectoryW(dir_to_create_utf16.begin(), NULL)) |
| return windows_error(::GetLastError()); |
| } |
| } |
| goto retry_create_file; |
| } |
| return ec; |
| } |
| |
| // Set result_path to the utf-8 representation of the path. |
| if (error_code ec = UTF16ToUTF8(random_path_utf16.begin(), |
| random_path_utf16.size(), result_path)) { |
| ::CloseHandle(TempFileHandle); |
| ::DeleteFileW(random_path_utf16.begin()); |
| return ec; |
| } |
| |
| // Convert the Windows API file handle into a C-runtime handle. |
| int fd = ::_open_osfhandle(intptr_t(TempFileHandle), 0); |
| if (fd == -1) { |
| ::CloseHandle(TempFileHandle); |
| ::DeleteFileW(random_path_utf16.begin()); |
| // MSDN doesn't say anything about _open_osfhandle setting errno or |
| // GetLastError(), so just return invalid_handle. |
| return windows_error::invalid_handle; |
| } |
| |
| result_fd = fd; |
| return error_code::success(); |
| } |
| |
| error_code get_magic(const Twine &path, uint32_t len, |
| SmallVectorImpl<char> &result) { |
| SmallString<128> path_storage; |
| SmallVector<wchar_t, 128> path_utf16; |
| result.set_size(0); |
| |
| // Convert path to UTF-16. |
| if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage), |
| path_utf16)) |
| return ec; |
| |
| // Open file. |
| HANDLE file = ::CreateFileW(c_str(path_utf16), |
| GENERIC_READ, |
| FILE_SHARE_READ, |
| NULL, |
| OPEN_EXISTING, |
| FILE_ATTRIBUTE_READONLY, |
| NULL); |
| if (file == INVALID_HANDLE_VALUE) |
| return windows_error(::GetLastError()); |
| |
| // Allocate buffer. |
| result.reserve(len); |
| |
| // Get magic! |
| DWORD bytes_read = 0; |
| BOOL read_success = ::ReadFile(file, result.data(), len, &bytes_read, NULL); |
| error_code ec = windows_error(::GetLastError()); |
| ::CloseHandle(file); |
| if (!read_success || (bytes_read != len)) { |
| // Set result size to the number of bytes read if it's valid. |
| if (bytes_read <= len) |
| result.set_size(bytes_read); |
| // ERROR_HANDLE_EOF is mapped to errc::value_too_large. |
| return ec; |
| } |
| |
| result.set_size(len); |
| return error_code::success(); |
| } |
| |
| error_code mapped_file_region::init(int FD, bool CloseFD, uint64_t Offset) { |
| FileDescriptor = FD; |
| // Make sure that the requested size fits within SIZE_T. |
| if (Size > std::numeric_limits<SIZE_T>::max()) { |
| if (FileDescriptor) { |
| if (CloseFD) |
| _close(FileDescriptor); |
| } else |
| ::CloseHandle(FileHandle); |
| return make_error_code(errc::invalid_argument); |
| } |
| |
| DWORD flprotect; |
| switch (Mode) { |
| case readonly: flprotect = PAGE_READONLY; break; |
| case readwrite: flprotect = PAGE_READWRITE; break; |
| case priv: flprotect = PAGE_WRITECOPY; break; |
| default: llvm_unreachable("invalid mapping mode"); |
| } |
| |
| FileMappingHandle = ::CreateFileMapping(FileHandle, |
| 0, |
| flprotect, |
| Size >> 32, |
| Size & 0xffffffff, |
| 0); |
| if (FileMappingHandle == NULL) { |
| error_code ec = windows_error(GetLastError()); |
| if (FileDescriptor) { |
| if (CloseFD) |
| _close(FileDescriptor); |
| } else |
| ::CloseHandle(FileHandle); |
| return ec; |
| } |
| |
| DWORD dwDesiredAccess; |
| switch (Mode) { |
| case readonly: dwDesiredAccess = FILE_MAP_READ; break; |
| case readwrite: dwDesiredAccess = FILE_MAP_WRITE; break; |
| case priv: dwDesiredAccess = FILE_MAP_COPY; break; |
| default: llvm_unreachable("invalid mapping mode"); |
| } |
| Mapping = ::MapViewOfFile(FileMappingHandle, |
| dwDesiredAccess, |
| Offset >> 32, |
| Offset & 0xffffffff, |
| Size); |
| if (Mapping == NULL) { |
| error_code ec = windows_error(GetLastError()); |
| ::CloseHandle(FileMappingHandle); |
| if (FileDescriptor) { |
| if (CloseFD) |
| _close(FileDescriptor); |
| } else |
| ::CloseHandle(FileHandle); |
| return ec; |
| } |
| |
| if (Size == 0) { |
| MEMORY_BASIC_INFORMATION mbi; |
| SIZE_T Result = VirtualQuery(Mapping, &mbi, sizeof(mbi)); |
| if (Result == 0) { |
| error_code ec = windows_error(GetLastError()); |
| ::UnmapViewOfFile(Mapping); |
| ::CloseHandle(FileMappingHandle); |
| if (FileDescriptor) { |
| if (CloseFD) |
| _close(FileDescriptor); |
| } else |
| ::CloseHandle(FileHandle); |
| return ec; |
| } |
| Size = mbi.RegionSize; |
| } |
| |
| // Close all the handles except for the view. It will keep the other handles |
| // alive. |
| ::CloseHandle(FileMappingHandle); |
| if (FileDescriptor) { |
| if (CloseFD) |
| _close(FileDescriptor); // Also closes FileHandle. |
| } else |
| ::CloseHandle(FileHandle); |
| return error_code::success(); |
| } |
| |
| mapped_file_region::mapped_file_region(const Twine &path, |
| mapmode mode, |
| uint64_t length, |
| uint64_t offset, |
| error_code &ec) |
| : Mode(mode) |
| , Size(length) |
| , Mapping() |
| , FileDescriptor() |
| , FileHandle(INVALID_HANDLE_VALUE) |
| , FileMappingHandle() { |
| SmallString<128> path_storage; |
| SmallVector<wchar_t, 128> path_utf16; |
| |
| // Convert path to UTF-16. |
| if ((ec = UTF8ToUTF16(path.toStringRef(path_storage), path_utf16))) |
| return; |
| |
| // Get file handle for creating a file mapping. |
| FileHandle = ::CreateFileW(c_str(path_utf16), |
| Mode == readonly ? GENERIC_READ |
| : GENERIC_READ | GENERIC_WRITE, |
| Mode == readonly ? FILE_SHARE_READ |
| : 0, |
| 0, |
| Mode == readonly ? OPEN_EXISTING |
| : OPEN_ALWAYS, |
| Mode == readonly ? FILE_ATTRIBUTE_READONLY |
| : FILE_ATTRIBUTE_NORMAL, |
| 0); |
| if (FileHandle == INVALID_HANDLE_VALUE) { |
| ec = windows_error(::GetLastError()); |
| return; |
| } |
| |
| FileDescriptor = 0; |
| ec = init(FileDescriptor, true, offset); |
| if (ec) { |
| Mapping = FileMappingHandle = 0; |
| FileHandle = INVALID_HANDLE_VALUE; |
| FileDescriptor = 0; |
| } |
| } |
| |
| mapped_file_region::mapped_file_region(int fd, |
| bool closefd, |
| mapmode mode, |
| uint64_t length, |
| uint64_t offset, |
| error_code &ec) |
| : Mode(mode) |
| , Size(length) |
| , Mapping() |
| , FileDescriptor(fd) |
| , FileHandle(INVALID_HANDLE_VALUE) |
| , FileMappingHandle() { |
| FileHandle = reinterpret_cast<HANDLE>(_get_osfhandle(fd)); |
| if (FileHandle == INVALID_HANDLE_VALUE) { |
| if (closefd) |
| _close(FileDescriptor); |
| FileDescriptor = 0; |
| ec = make_error_code(errc::bad_file_descriptor); |
| return; |
| } |
| |
| ec = init(FileDescriptor, closefd, offset); |
| if (ec) { |
| Mapping = FileMappingHandle = 0; |
| FileHandle = INVALID_HANDLE_VALUE; |
| FileDescriptor = 0; |
| } |
| } |
| |
| mapped_file_region::~mapped_file_region() { |
| if (Mapping) |
| ::UnmapViewOfFile(Mapping); |
| } |
| |
| #if LLVM_HAS_RVALUE_REFERENCES |
| mapped_file_region::mapped_file_region(mapped_file_region &&other) |
| : Mode(other.Mode) |
| , Size(other.Size) |
| , Mapping(other.Mapping) |
| , FileDescriptor(other.FileDescriptor) |
| , FileHandle(other.FileHandle) |
| , FileMappingHandle(other.FileMappingHandle) { |
| other.Mapping = other.FileMappingHandle = 0; |
| other.FileHandle = INVALID_HANDLE_VALUE; |
| other.FileDescriptor = 0; |
| } |
| #endif |
| |
| mapped_file_region::mapmode mapped_file_region::flags() const { |
| assert(Mapping && "Mapping failed but used anyway!"); |
| return Mode; |
| } |
| |
| uint64_t mapped_file_region::size() const { |
| assert(Mapping && "Mapping failed but used anyway!"); |
| return Size; |
| } |
| |
| char *mapped_file_region::data() const { |
| assert(Mode != readonly && "Cannot get non const data for readonly mapping!"); |
| assert(Mapping && "Mapping failed but used anyway!"); |
| return reinterpret_cast<char*>(Mapping); |
| } |
| |
| const char *mapped_file_region::const_data() const { |
| assert(Mapping && "Mapping failed but used anyway!"); |
| return reinterpret_cast<const char*>(Mapping); |
| } |
| |
| int mapped_file_region::alignment() { |
| SYSTEM_INFO SysInfo; |
| ::GetSystemInfo(&SysInfo); |
| return SysInfo.dwAllocationGranularity; |
| } |
| |
| error_code detail::directory_iterator_construct(detail::DirIterState &it, |
| StringRef path){ |
| SmallVector<wchar_t, 128> path_utf16; |
| |
| if (error_code ec = UTF8ToUTF16(path, |
| path_utf16)) |
| return ec; |
| |
| // Convert path to the format that Windows is happy with. |
| if (path_utf16.size() > 0 && |
| !is_separator(path_utf16[path.size() - 1]) && |
| path_utf16[path.size() - 1] != L':') { |
| path_utf16.push_back(L'\\'); |
| path_utf16.push_back(L'*'); |
| } else { |
| path_utf16.push_back(L'*'); |
| } |
| |
| // Get the first directory entry. |
| WIN32_FIND_DATAW FirstFind; |
| ScopedFindHandle FindHandle(::FindFirstFileW(c_str(path_utf16), &FirstFind)); |
| if (!FindHandle) |
| return windows_error(::GetLastError()); |
| |
| size_t FilenameLen = ::wcslen(FirstFind.cFileName); |
| while ((FilenameLen == 1 && FirstFind.cFileName[0] == L'.') || |
| (FilenameLen == 2 && FirstFind.cFileName[0] == L'.' && |
| FirstFind.cFileName[1] == L'.')) |
| if (!::FindNextFileW(FindHandle, &FirstFind)) { |
| error_code ec = windows_error(::GetLastError()); |
| // Check for end. |
| if (ec == windows_error::no_more_files) |
| return detail::directory_iterator_destruct(it); |
| return ec; |
| } else |
| FilenameLen = ::wcslen(FirstFind.cFileName); |
| |
| // Construct the current directory entry. |
| SmallString<128> directory_entry_name_utf8; |
| if (error_code ec = UTF16ToUTF8(FirstFind.cFileName, |
| ::wcslen(FirstFind.cFileName), |
| directory_entry_name_utf8)) |
| return ec; |
| |
| it.IterationHandle = intptr_t(FindHandle.take()); |
| SmallString<128> directory_entry_path(path); |
| path::append(directory_entry_path, directory_entry_name_utf8.str()); |
| it.CurrentEntry = directory_entry(directory_entry_path.str()); |
| |
| return error_code::success(); |
| } |
| |
| error_code detail::directory_iterator_destruct(detail::DirIterState &it) { |
| if (it.IterationHandle != 0) |
| // Closes the handle if it's valid. |
| ScopedFindHandle close(HANDLE(it.IterationHandle)); |
| it.IterationHandle = 0; |
| it.CurrentEntry = directory_entry(); |
| return error_code::success(); |
| } |
| |
| error_code detail::directory_iterator_increment(detail::DirIterState &it) { |
| WIN32_FIND_DATAW FindData; |
| if (!::FindNextFileW(HANDLE(it.IterationHandle), &FindData)) { |
| error_code ec = windows_error(::GetLastError()); |
| // Check for end. |
| if (ec == windows_error::no_more_files) |
| return detail::directory_iterator_destruct(it); |
| return ec; |
| } |
| |
| size_t FilenameLen = ::wcslen(FindData.cFileName); |
| if ((FilenameLen == 1 && FindData.cFileName[0] == L'.') || |
| (FilenameLen == 2 && FindData.cFileName[0] == L'.' && |
| FindData.cFileName[1] == L'.')) |
| return directory_iterator_increment(it); |
| |
| SmallString<128> directory_entry_path_utf8; |
| if (error_code ec = UTF16ToUTF8(FindData.cFileName, |
| ::wcslen(FindData.cFileName), |
| directory_entry_path_utf8)) |
| return ec; |
| |
| it.CurrentEntry.replace_filename(Twine(directory_entry_path_utf8)); |
| return error_code::success(); |
| } |
| |
| error_code map_file_pages(const Twine &path, off_t file_offset, size_t size, |
| bool map_writable, void *&result) { |
| assert(0 && "NOT IMPLEMENTED"); |
| return windows_error::invalid_function; |
| } |
| |
| error_code unmap_file_pages(void *base, size_t size) { |
| assert(0 && "NOT IMPLEMENTED"); |
| return windows_error::invalid_function; |
| } |
| |
| |
| |
| } // end namespace fs |
| } // end namespace sys |
| } // end namespace llvm |
