Michael J. Spencer | ae7de7e | 2010-12-09 17:37:42 +0000 | [diff] [blame] | 1 | //===- llvm/Support/Windows/PathV2.inc - Windows Path Impl ------*- C++ -*-===// |
Michael J. Spencer | ebad2f9 | 2010-11-29 22:28:51 +0000 | [diff] [blame] | 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This file implements the Windows specific implementation of the PathV2 API. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | //===----------------------------------------------------------------------===// |
| 15 | //=== WARNING: Implementation here must contain only generic Windows code that |
| 16 | //=== is guaranteed to work on *all* Windows variants. |
| 17 | //===----------------------------------------------------------------------===// |
| 18 | |
| 19 | #include "Windows.h" |
Michael J. Spencer | c20a032 | 2010-12-03 17:54:07 +0000 | [diff] [blame] | 20 | #include <fcntl.h> |
Michael J. Spencer | 4571040 | 2010-12-03 01:21:28 +0000 | [diff] [blame] | 21 | #include <io.h> |
Michael J. Spencer | c20a032 | 2010-12-03 17:54:07 +0000 | [diff] [blame] | 22 | #include <sys/stat.h> |
| 23 | #include <sys/types.h> |
Michael J. Spencer | ebad2f9 | 2010-11-29 22:28:51 +0000 | [diff] [blame] | 24 | |
Michael J. Spencer | ef2284f | 2012-08-15 19:05:47 +0000 | [diff] [blame] | 25 | #undef max |
| 26 | |
Michael J. Spencer | 6025247 | 2010-12-03 18:03:28 +0000 | [diff] [blame] | 27 | // MinGW doesn't define this. |
Michael J. Spencer | 521c321 | 2010-12-03 18:04:11 +0000 | [diff] [blame] | 28 | #ifndef _ERRNO_T_DEFINED |
| 29 | #define _ERRNO_T_DEFINED |
| 30 | typedef int errno_t; |
Michael J. Spencer | 6025247 | 2010-12-03 18:03:28 +0000 | [diff] [blame] | 31 | #endif |
| 32 | |
Michael J. Spencer | 9fc1d9d | 2010-12-01 19:32:01 +0000 | [diff] [blame] | 33 | using namespace llvm; |
| 34 | |
| 35 | namespace { |
Michael J. Spencer | 772caff5 | 2010-12-03 17:53:23 +0000 | [diff] [blame] | 36 | typedef BOOLEAN (WINAPI *PtrCreateSymbolicLinkW)( |
| 37 | /*__in*/ LPCWSTR lpSymlinkFileName, |
| 38 | /*__in*/ LPCWSTR lpTargetFileName, |
| 39 | /*__in*/ DWORD dwFlags); |
| 40 | |
| 41 | PtrCreateSymbolicLinkW create_symbolic_link_api = PtrCreateSymbolicLinkW( |
Michael J. Spencer | 7ee6d5d | 2010-12-03 07:41:25 +0000 | [diff] [blame] | 42 | ::GetProcAddress(::GetModuleHandleA("kernel32.dll"), |
| 43 | "CreateSymbolicLinkW")); |
| 44 | |
Benjamin Kramer | cb520cd | 2010-12-17 18:59:09 +0000 | [diff] [blame] | 45 | error_code UTF8ToUTF16(StringRef utf8, SmallVectorImpl<wchar_t> &utf16) { |
Michael J. Spencer | 9fc1d9d | 2010-12-01 19:32:01 +0000 | [diff] [blame] | 46 | int len = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, |
| 47 | utf8.begin(), utf8.size(), |
| 48 | utf16.begin(), 0); |
| 49 | |
| 50 | if (len == 0) |
Michael J. Spencer | 66a1f86 | 2010-12-04 18:45:32 +0000 | [diff] [blame] | 51 | return windows_error(::GetLastError()); |
Michael J. Spencer | 9fc1d9d | 2010-12-01 19:32:01 +0000 | [diff] [blame] | 52 | |
| 53 | utf16.reserve(len + 1); |
| 54 | utf16.set_size(len); |
| 55 | |
| 56 | len = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, |
| 57 | utf8.begin(), utf8.size(), |
| 58 | utf16.begin(), utf16.size()); |
| 59 | |
| 60 | if (len == 0) |
Michael J. Spencer | 66a1f86 | 2010-12-04 18:45:32 +0000 | [diff] [blame] | 61 | return windows_error(::GetLastError()); |
Michael J. Spencer | 9fc1d9d | 2010-12-01 19:32:01 +0000 | [diff] [blame] | 62 | |
| 63 | // Make utf16 null terminated. |
| 64 | utf16.push_back(0); |
| 65 | utf16.pop_back(); |
| 66 | |
David Blaikie | 18544b9 | 2012-02-09 19:24:12 +0000 | [diff] [blame] | 67 | return error_code::success(); |
Michael J. Spencer | 9fc1d9d | 2010-12-01 19:32:01 +0000 | [diff] [blame] | 68 | } |
Michael J. Spencer | 4571040 | 2010-12-03 01:21:28 +0000 | [diff] [blame] | 69 | |
| 70 | error_code UTF16ToUTF8(const wchar_t *utf16, size_t utf16_len, |
| 71 | SmallVectorImpl<char> &utf8) { |
| 72 | // Get length. |
Michael J. Spencer | 962fbc4 | 2010-12-04 00:32:14 +0000 | [diff] [blame] | 73 | int len = ::WideCharToMultiByte(CP_UTF8, 0, |
Michael J. Spencer | 4571040 | 2010-12-03 01:21:28 +0000 | [diff] [blame] | 74 | utf16, utf16_len, |
| 75 | utf8.begin(), 0, |
| 76 | NULL, NULL); |
| 77 | |
| 78 | if (len == 0) |
Michael J. Spencer | 66a1f86 | 2010-12-04 18:45:32 +0000 | [diff] [blame] | 79 | return windows_error(::GetLastError()); |
Michael J. Spencer | 4571040 | 2010-12-03 01:21:28 +0000 | [diff] [blame] | 80 | |
| 81 | utf8.reserve(len); |
| 82 | utf8.set_size(len); |
| 83 | |
| 84 | // Now do the actual conversion. |
Michael J. Spencer | 962fbc4 | 2010-12-04 00:32:14 +0000 | [diff] [blame] | 85 | len = ::WideCharToMultiByte(CP_UTF8, 0, |
Michael J. Spencer | 4571040 | 2010-12-03 01:21:28 +0000 | [diff] [blame] | 86 | utf16, utf16_len, |
| 87 | utf8.data(), utf8.size(), |
| 88 | NULL, NULL); |
| 89 | |
| 90 | if (len == 0) |
Michael J. Spencer | 66a1f86 | 2010-12-04 18:45:32 +0000 | [diff] [blame] | 91 | return windows_error(::GetLastError()); |
Michael J. Spencer | 4571040 | 2010-12-03 01:21:28 +0000 | [diff] [blame] | 92 | |
| 93 | // Make utf8 null terminated. |
| 94 | utf8.push_back(0); |
| 95 | utf8.pop_back(); |
| 96 | |
David Blaikie | 18544b9 | 2012-02-09 19:24:12 +0000 | [diff] [blame] | 97 | return error_code::success(); |
Michael J. Spencer | 4571040 | 2010-12-03 01:21:28 +0000 | [diff] [blame] | 98 | } |
| 99 | |
| 100 | error_code TempDir(SmallVectorImpl<wchar_t> &result) { |
| 101 | retry_temp_dir: |
| 102 | DWORD len = ::GetTempPathW(result.capacity(), result.begin()); |
| 103 | |
| 104 | if (len == 0) |
Michael J. Spencer | 66a1f86 | 2010-12-04 18:45:32 +0000 | [diff] [blame] | 105 | return windows_error(::GetLastError()); |
Michael J. Spencer | 4571040 | 2010-12-03 01:21:28 +0000 | [diff] [blame] | 106 | |
| 107 | if (len > result.capacity()) { |
| 108 | result.reserve(len); |
| 109 | goto retry_temp_dir; |
| 110 | } |
| 111 | |
| 112 | result.set_size(len); |
David Blaikie | 18544b9 | 2012-02-09 19:24:12 +0000 | [diff] [blame] | 113 | return error_code::success(); |
Michael J. Spencer | 4571040 | 2010-12-03 01:21:28 +0000 | [diff] [blame] | 114 | } |
| 115 | |
Michael J. Spencer | 7ecd94c | 2010-12-06 04:28:42 +0000 | [diff] [blame] | 116 | bool is_separator(const wchar_t value) { |
| 117 | switch (value) { |
| 118 | case L'\\': |
| 119 | case L'/': |
| 120 | return true; |
| 121 | default: |
| 122 | return false; |
| 123 | } |
| 124 | } |
Michael J. Spencer | 9fc1d9d | 2010-12-01 19:32:01 +0000 | [diff] [blame] | 125 | } |
| 126 | |
Michael J. Spencer | ebad2f9 | 2010-11-29 22:28:51 +0000 | [diff] [blame] | 127 | namespace llvm { |
| 128 | namespace sys { |
Michael J. Spencer | 20daa28 | 2010-12-07 01:22:31 +0000 | [diff] [blame] | 129 | namespace fs { |
Michael J. Spencer | ebad2f9 | 2010-11-29 22:28:51 +0000 | [diff] [blame] | 130 | |
| 131 | error_code current_path(SmallVectorImpl<char> &result) { |
| 132 | SmallVector<wchar_t, 128> cur_path; |
| 133 | cur_path.reserve(128); |
| 134 | retry_cur_dir: |
| 135 | DWORD len = ::GetCurrentDirectoryW(cur_path.capacity(), cur_path.data()); |
| 136 | |
| 137 | // A zero return value indicates a failure other than insufficient space. |
| 138 | if (len == 0) |
Michael J. Spencer | 66a1f86 | 2010-12-04 18:45:32 +0000 | [diff] [blame] | 139 | return windows_error(::GetLastError()); |
Michael J. Spencer | ebad2f9 | 2010-11-29 22:28:51 +0000 | [diff] [blame] | 140 | |
| 141 | // If there's insufficient space, the len returned is larger than the len |
| 142 | // given. |
| 143 | if (len > cur_path.capacity()) { |
| 144 | cur_path.reserve(len); |
| 145 | goto retry_cur_dir; |
| 146 | } |
| 147 | |
| 148 | cur_path.set_size(len); |
| 149 | // cur_path now holds the current directory in utf-16. Convert to utf-8. |
| 150 | |
| 151 | // Find out how much space we need. Sadly, this function doesn't return the |
| 152 | // size needed unless you tell it the result size is 0, which means you |
| 153 | // _always_ have to call it twice. |
Michael J. Spencer | 962fbc4 | 2010-12-04 00:32:14 +0000 | [diff] [blame] | 154 | len = ::WideCharToMultiByte(CP_UTF8, 0, |
Michael J. Spencer | ebad2f9 | 2010-11-29 22:28:51 +0000 | [diff] [blame] | 155 | cur_path.data(), cur_path.size(), |
| 156 | result.data(), 0, |
| 157 | NULL, NULL); |
| 158 | |
| 159 | if (len == 0) |
| 160 | return make_error_code(windows_error(::GetLastError())); |
| 161 | |
| 162 | result.reserve(len); |
| 163 | result.set_size(len); |
| 164 | // Now do the actual conversion. |
Michael J. Spencer | 962fbc4 | 2010-12-04 00:32:14 +0000 | [diff] [blame] | 165 | len = ::WideCharToMultiByte(CP_UTF8, 0, |
Michael J. Spencer | ebad2f9 | 2010-11-29 22:28:51 +0000 | [diff] [blame] | 166 | cur_path.data(), cur_path.size(), |
| 167 | result.data(), result.size(), |
| 168 | NULL, NULL); |
| 169 | if (len == 0) |
Michael J. Spencer | 66a1f86 | 2010-12-04 18:45:32 +0000 | [diff] [blame] | 170 | return windows_error(::GetLastError()); |
Michael J. Spencer | ebad2f9 | 2010-11-29 22:28:51 +0000 | [diff] [blame] | 171 | |
David Blaikie | 18544b9 | 2012-02-09 19:24:12 +0000 | [diff] [blame] | 172 | return error_code::success(); |
Michael J. Spencer | ebad2f9 | 2010-11-29 22:28:51 +0000 | [diff] [blame] | 173 | } |
| 174 | |
Michael J. Spencer | 9fc1d9d | 2010-12-01 19:32:01 +0000 | [diff] [blame] | 175 | error_code copy_file(const Twine &from, const Twine &to, copy_option copt) { |
| 176 | // Get arguments. |
| 177 | SmallString<128> from_storage; |
| 178 | SmallString<128> to_storage; |
Michael J. Spencer | a41772a | 2010-12-03 01:21:38 +0000 | [diff] [blame] | 179 | StringRef f = from.toStringRef(from_storage); |
| 180 | StringRef t = to.toStringRef(to_storage); |
Michael J. Spencer | 9fc1d9d | 2010-12-01 19:32:01 +0000 | [diff] [blame] | 181 | |
| 182 | // Convert to utf-16. |
| 183 | SmallVector<wchar_t, 128> wide_from; |
| 184 | SmallVector<wchar_t, 128> wide_to; |
| 185 | if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec; |
| 186 | if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec; |
| 187 | |
| 188 | // Copy the file. |
| 189 | BOOL res = ::CopyFileW(wide_from.begin(), wide_to.begin(), |
| 190 | copt != copy_option::overwrite_if_exists); |
| 191 | |
| 192 | if (res == 0) |
Michael J. Spencer | 66a1f86 | 2010-12-04 18:45:32 +0000 | [diff] [blame] | 193 | return windows_error(::GetLastError()); |
Michael J. Spencer | 9fc1d9d | 2010-12-01 19:32:01 +0000 | [diff] [blame] | 194 | |
David Blaikie | 18544b9 | 2012-02-09 19:24:12 +0000 | [diff] [blame] | 195 | return error_code::success(); |
Michael J. Spencer | 9fc1d9d | 2010-12-01 19:32:01 +0000 | [diff] [blame] | 196 | } |
| 197 | |
Michael J. Spencer | 31e310c | 2010-12-03 05:42:11 +0000 | [diff] [blame] | 198 | error_code create_directory(const Twine &path, bool &existed) { |
| 199 | SmallString<128> path_storage; |
| 200 | SmallVector<wchar_t, 128> path_utf16; |
| 201 | |
| 202 | if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage), |
| 203 | path_utf16)) |
| 204 | return ec; |
| 205 | |
| 206 | if (!::CreateDirectoryW(path_utf16.begin(), NULL)) { |
Michael J. Spencer | 66a1f86 | 2010-12-04 18:45:32 +0000 | [diff] [blame] | 207 | error_code ec = windows_error(::GetLastError()); |
| 208 | if (ec == windows_error::already_exists) |
Michael J. Spencer | 31e310c | 2010-12-03 05:42:11 +0000 | [diff] [blame] | 209 | existed = true; |
| 210 | else |
| 211 | return ec; |
| 212 | } else |
| 213 | existed = false; |
| 214 | |
David Blaikie | 18544b9 | 2012-02-09 19:24:12 +0000 | [diff] [blame] | 215 | return error_code::success(); |
Michael J. Spencer | 31e310c | 2010-12-03 05:42:11 +0000 | [diff] [blame] | 216 | } |
| 217 | |
Michael J. Spencer | e0c4560 | 2010-12-03 05:58:41 +0000 | [diff] [blame] | 218 | error_code create_hard_link(const Twine &to, const Twine &from) { |
| 219 | // Get arguments. |
| 220 | SmallString<128> from_storage; |
| 221 | SmallString<128> to_storage; |
| 222 | StringRef f = from.toStringRef(from_storage); |
| 223 | StringRef t = to.toStringRef(to_storage); |
| 224 | |
| 225 | // Convert to utf-16. |
| 226 | SmallVector<wchar_t, 128> wide_from; |
| 227 | SmallVector<wchar_t, 128> wide_to; |
| 228 | if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec; |
| 229 | if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec; |
| 230 | |
| 231 | if (!::CreateHardLinkW(wide_from.begin(), wide_to.begin(), NULL)) |
Michael J. Spencer | 66a1f86 | 2010-12-04 18:45:32 +0000 | [diff] [blame] | 232 | return windows_error(::GetLastError()); |
Michael J. Spencer | e0c4560 | 2010-12-03 05:58:41 +0000 | [diff] [blame] | 233 | |
David Blaikie | 18544b9 | 2012-02-09 19:24:12 +0000 | [diff] [blame] | 234 | return error_code::success(); |
Michael J. Spencer | e0c4560 | 2010-12-03 05:58:41 +0000 | [diff] [blame] | 235 | } |
| 236 | |
Michael J. Spencer | 7ee6d5d | 2010-12-03 07:41:25 +0000 | [diff] [blame] | 237 | error_code create_symlink(const Twine &to, const Twine &from) { |
| 238 | // Only do it if the function is available at runtime. |
| 239 | if (!create_symbolic_link_api) |
| 240 | return make_error_code(errc::function_not_supported); |
| 241 | |
| 242 | // Get arguments. |
| 243 | SmallString<128> from_storage; |
| 244 | SmallString<128> to_storage; |
| 245 | StringRef f = from.toStringRef(from_storage); |
| 246 | StringRef t = to.toStringRef(to_storage); |
| 247 | |
| 248 | // Convert to utf-16. |
| 249 | SmallVector<wchar_t, 128> wide_from; |
| 250 | SmallVector<wchar_t, 128> wide_to; |
| 251 | if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec; |
| 252 | if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec; |
| 253 | |
Michael J. Spencer | 962fbc4 | 2010-12-04 00:32:14 +0000 | [diff] [blame] | 254 | if (!create_symbolic_link_api(wide_from.begin(), wide_to.begin(), 0)) |
Michael J. Spencer | 66a1f86 | 2010-12-04 18:45:32 +0000 | [diff] [blame] | 255 | return windows_error(::GetLastError()); |
Michael J. Spencer | 7ee6d5d | 2010-12-03 07:41:25 +0000 | [diff] [blame] | 256 | |
David Blaikie | 18544b9 | 2012-02-09 19:24:12 +0000 | [diff] [blame] | 257 | return error_code::success(); |
Michael J. Spencer | 7ee6d5d | 2010-12-03 07:41:25 +0000 | [diff] [blame] | 258 | } |
| 259 | |
Michael J. Spencer | 6e74e11 | 2010-12-03 17:53:43 +0000 | [diff] [blame] | 260 | error_code remove(const Twine &path, bool &existed) { |
| 261 | SmallString<128> path_storage; |
| 262 | SmallVector<wchar_t, 128> path_utf16; |
| 263 | |
Michael J. Spencer | 153749b | 2011-01-05 16:39:22 +0000 | [diff] [blame] | 264 | file_status st; |
| 265 | if (error_code ec = status(path, st)) |
| 266 | return ec; |
| 267 | |
Michael J. Spencer | 6e74e11 | 2010-12-03 17:53:43 +0000 | [diff] [blame] | 268 | if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage), |
| 269 | path_utf16)) |
| 270 | return ec; |
| 271 | |
Michael J. Spencer | 153749b | 2011-01-05 16:39:22 +0000 | [diff] [blame] | 272 | if (st.type() == file_type::directory_file) { |
| 273 | if (!::RemoveDirectoryW(c_str(path_utf16))) { |
| 274 | error_code ec = windows_error(::GetLastError()); |
| 275 | if (ec != windows_error::file_not_found) |
| 276 | return ec; |
| 277 | existed = false; |
| 278 | } else |
| 279 | existed = true; |
| 280 | } else { |
| 281 | if (!::DeleteFileW(c_str(path_utf16))) { |
| 282 | error_code ec = windows_error(::GetLastError()); |
| 283 | if (ec != windows_error::file_not_found) |
| 284 | return ec; |
| 285 | existed = false; |
| 286 | } else |
| 287 | existed = true; |
| 288 | } |
Michael J. Spencer | 6e74e11 | 2010-12-03 17:53:43 +0000 | [diff] [blame] | 289 | |
David Blaikie | 18544b9 | 2012-02-09 19:24:12 +0000 | [diff] [blame] | 290 | return error_code::success(); |
Michael J. Spencer | 6e74e11 | 2010-12-03 17:53:43 +0000 | [diff] [blame] | 291 | } |
| 292 | |
Michael J. Spencer | 409f556 | 2010-12-03 17:53:55 +0000 | [diff] [blame] | 293 | error_code rename(const Twine &from, const Twine &to) { |
| 294 | // Get arguments. |
| 295 | SmallString<128> from_storage; |
| 296 | SmallString<128> to_storage; |
| 297 | StringRef f = from.toStringRef(from_storage); |
| 298 | StringRef t = to.toStringRef(to_storage); |
| 299 | |
| 300 | // Convert to utf-16. |
| 301 | SmallVector<wchar_t, 128> wide_from; |
| 302 | SmallVector<wchar_t, 128> wide_to; |
| 303 | if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec; |
| 304 | if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec; |
| 305 | |
NAKAMURA Takumi | 3b7f995 | 2012-05-08 14:31:46 +0000 | [diff] [blame] | 306 | error_code ec = error_code::success(); |
| 307 | for (int i = 0; i < 2000; i++) { |
| 308 | if (::MoveFileExW(wide_from.begin(), wide_to.begin(), |
| 309 | MOVEFILE_COPY_ALLOWED | MOVEFILE_REPLACE_EXISTING)) |
| 310 | return error_code::success(); |
| 311 | ec = windows_error(::GetLastError()); |
| 312 | if (ec != windows_error::access_denied) |
| 313 | break; |
| 314 | // Retry MoveFile() at ACCESS_DENIED. |
| 315 | // System scanners (eg. indexer) might open the source file when |
| 316 | // It is written and closed. |
| 317 | ::Sleep(1); |
| 318 | } |
Michael J. Spencer | 409f556 | 2010-12-03 17:53:55 +0000 | [diff] [blame] | 319 | |
NAKAMURA Takumi | 3b7f995 | 2012-05-08 14:31:46 +0000 | [diff] [blame] | 320 | return ec; |
Michael J. Spencer | 409f556 | 2010-12-03 17:53:55 +0000 | [diff] [blame] | 321 | } |
| 322 | |
Michael J. Spencer | c20a032 | 2010-12-03 17:54:07 +0000 | [diff] [blame] | 323 | error_code resize_file(const Twine &path, uint64_t size) { |
| 324 | SmallString<128> path_storage; |
| 325 | SmallVector<wchar_t, 128> path_utf16; |
| 326 | |
| 327 | if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage), |
| 328 | path_utf16)) |
| 329 | return ec; |
| 330 | |
Michael J. Spencer | 20abb20 | 2012-12-03 22:09:31 +0000 | [diff] [blame] | 331 | int fd = ::_wopen(path_utf16.begin(), O_BINARY | _O_RDWR, S_IWRITE); |
Michael J. Spencer | c20a032 | 2010-12-03 17:54:07 +0000 | [diff] [blame] | 332 | if (fd == -1) |
| 333 | return error_code(errno, generic_category()); |
Michael J. Spencer | ca242f2 | 2010-12-03 18:48:56 +0000 | [diff] [blame] | 334 | #ifdef HAVE__CHSIZE_S |
Michael J. Spencer | c20a032 | 2010-12-03 17:54:07 +0000 | [diff] [blame] | 335 | errno_t error = ::_chsize_s(fd, size); |
Michael J. Spencer | ca242f2 | 2010-12-03 18:48:56 +0000 | [diff] [blame] | 336 | #else |
| 337 | errno_t error = ::_chsize(fd, size); |
| 338 | #endif |
Michael J. Spencer | c20a032 | 2010-12-03 17:54:07 +0000 | [diff] [blame] | 339 | ::close(fd); |
| 340 | return error_code(error, generic_category()); |
| 341 | } |
| 342 | |
Michael J. Spencer | 4571040 | 2010-12-03 01:21:28 +0000 | [diff] [blame] | 343 | error_code exists(const Twine &path, bool &result) { |
| 344 | SmallString<128> path_storage; |
| 345 | SmallVector<wchar_t, 128> path_utf16; |
| 346 | |
| 347 | if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage), |
| 348 | path_utf16)) |
| 349 | return ec; |
| 350 | |
| 351 | DWORD attributes = ::GetFileAttributesW(path_utf16.begin()); |
| 352 | |
| 353 | if (attributes == INVALID_FILE_ATTRIBUTES) { |
| 354 | // See if the file didn't actually exist. |
| 355 | error_code ec = make_error_code(windows_error(::GetLastError())); |
Michael J. Spencer | 66a1f86 | 2010-12-04 18:45:32 +0000 | [diff] [blame] | 356 | if (ec != windows_error::file_not_found && |
| 357 | ec != windows_error::path_not_found) |
Michael J. Spencer | 4571040 | 2010-12-03 01:21:28 +0000 | [diff] [blame] | 358 | return ec; |
| 359 | result = false; |
| 360 | } else |
| 361 | result = true; |
David Blaikie | 18544b9 | 2012-02-09 19:24:12 +0000 | [diff] [blame] | 362 | return error_code::success(); |
Michael J. Spencer | 4571040 | 2010-12-03 01:21:28 +0000 | [diff] [blame] | 363 | } |
| 364 | |
Rafael Espindola | b0a5c96 | 2013-06-14 19:38:45 +0000 | [diff] [blame^] | 365 | bool can_execute(const Twine &Path) { |
| 366 | SmallString<128> PathStorage; |
| 367 | SmallVector<wchar_t, 128> PathUtf16; |
| 368 | |
| 369 | if (UTF8ToUTF16(Path.toStringRef(PathStorage), PathUtf16)) |
| 370 | return false; |
| 371 | |
| 372 | DWORD Attr = ::GetFileAttributesW(PathUtf16.begin()); |
| 373 | return Attr != INVALID_FILE_ATTRIBUTES; |
| 374 | } |
| 375 | |
Michael J. Spencer | 203d780 | 2011-12-12 06:04:28 +0000 | [diff] [blame] | 376 | bool equivalent(file_status A, file_status B) { |
| 377 | assert(status_known(A) && status_known(B)); |
| 378 | return A.FileIndexHigh == B.FileIndexHigh && |
| 379 | A.FileIndexLow == B.FileIndexLow && |
| 380 | A.FileSizeHigh == B.FileSizeHigh && |
| 381 | A.FileSizeLow == B.FileSizeLow && |
| 382 | A.LastWriteTimeHigh == B.LastWriteTimeHigh && |
| 383 | A.LastWriteTimeLow == B.LastWriteTimeLow && |
| 384 | A.VolumeSerialNumber == B.VolumeSerialNumber; |
| 385 | } |
| 386 | |
Michael J. Spencer | 376d387 | 2010-12-03 18:49:13 +0000 | [diff] [blame] | 387 | error_code equivalent(const Twine &A, const Twine &B, bool &result) { |
Michael J. Spencer | 203d780 | 2011-12-12 06:04:28 +0000 | [diff] [blame] | 388 | file_status fsA, fsB; |
| 389 | if (error_code ec = status(A, fsA)) return ec; |
| 390 | if (error_code ec = status(B, fsB)) return ec; |
| 391 | result = equivalent(fsA, fsB); |
David Blaikie | 18544b9 | 2012-02-09 19:24:12 +0000 | [diff] [blame] | 392 | return error_code::success(); |
Michael J. Spencer | 376d387 | 2010-12-03 18:49:13 +0000 | [diff] [blame] | 393 | } |
| 394 | |
Michael J. Spencer | 818ab4a | 2010-12-04 00:31:48 +0000 | [diff] [blame] | 395 | error_code file_size(const Twine &path, uint64_t &result) { |
| 396 | SmallString<128> path_storage; |
| 397 | SmallVector<wchar_t, 128> path_utf16; |
| 398 | |
| 399 | if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage), |
| 400 | path_utf16)) |
| 401 | return ec; |
| 402 | |
| 403 | WIN32_FILE_ATTRIBUTE_DATA FileData; |
| 404 | if (!::GetFileAttributesExW(path_utf16.begin(), |
| 405 | ::GetFileExInfoStandard, |
| 406 | &FileData)) |
Michael J. Spencer | 66a1f86 | 2010-12-04 18:45:32 +0000 | [diff] [blame] | 407 | return windows_error(::GetLastError()); |
Michael J. Spencer | 818ab4a | 2010-12-04 00:31:48 +0000 | [diff] [blame] | 408 | |
| 409 | result = |
| 410 | (uint64_t(FileData.nFileSizeHigh) << (sizeof(FileData.nFileSizeLow) * 8)) |
| 411 | + FileData.nFileSizeLow; |
| 412 | |
David Blaikie | 18544b9 | 2012-02-09 19:24:12 +0000 | [diff] [blame] | 413 | return error_code::success(); |
Michael J. Spencer | 818ab4a | 2010-12-04 00:31:48 +0000 | [diff] [blame] | 414 | } |
| 415 | |
Benjamin Kramer | 58994ec | 2011-08-20 21:36:38 +0000 | [diff] [blame] | 416 | static bool isReservedName(StringRef path) { |
| 417 | // This list of reserved names comes from MSDN, at: |
| 418 | // http://msdn.microsoft.com/en-us/library/aa365247%28v=vs.85%29.aspx |
| 419 | static const char *sReservedNames[] = { "nul", "con", "prn", "aux", |
| 420 | "com1", "com2", "com3", "com4", "com5", "com6", |
| 421 | "com7", "com8", "com9", "lpt1", "lpt2", "lpt3", |
| 422 | "lpt4", "lpt5", "lpt6", "lpt7", "lpt8", "lpt9" }; |
| 423 | |
| 424 | // First, check to see if this is a device namespace, which always |
| 425 | // starts with \\.\, since device namespaces are not legal file paths. |
| 426 | if (path.startswith("\\\\.\\")) |
| 427 | return true; |
| 428 | |
| 429 | // Then compare against the list of ancient reserved names |
| 430 | for (size_t i = 0; i < sizeof(sReservedNames) / sizeof(const char *); ++i) { |
| 431 | if (path.equals_lower(sReservedNames[i])) |
| 432 | return true; |
| 433 | } |
| 434 | |
| 435 | // The path isn't what we consider reserved. |
| 436 | return false; |
| 437 | } |
| 438 | |
Michael J. Spencer | db5576a | 2010-12-04 00:32:40 +0000 | [diff] [blame] | 439 | error_code status(const Twine &path, file_status &result) { |
| 440 | SmallString<128> path_storage; |
| 441 | SmallVector<wchar_t, 128> path_utf16; |
| 442 | |
NAKAMURA Takumi | a3d4749 | 2011-03-16 02:53:32 +0000 | [diff] [blame] | 443 | StringRef path8 = path.toStringRef(path_storage); |
Benjamin Kramer | 58994ec | 2011-08-20 21:36:38 +0000 | [diff] [blame] | 444 | if (isReservedName(path8)) { |
NAKAMURA Takumi | a3d4749 | 2011-03-16 02:53:32 +0000 | [diff] [blame] | 445 | result = file_status(file_type::character_file); |
David Blaikie | 18544b9 | 2012-02-09 19:24:12 +0000 | [diff] [blame] | 446 | return error_code::success(); |
NAKAMURA Takumi | a3d4749 | 2011-03-16 02:53:32 +0000 | [diff] [blame] | 447 | } |
| 448 | |
Michael J. Spencer | 203d780 | 2011-12-12 06:04:28 +0000 | [diff] [blame] | 449 | if (error_code ec = UTF8ToUTF16(path8, path_utf16)) |
Michael J. Spencer | db5576a | 2010-12-04 00:32:40 +0000 | [diff] [blame] | 450 | return ec; |
| 451 | |
| 452 | DWORD attr = ::GetFileAttributesW(path_utf16.begin()); |
| 453 | if (attr == INVALID_FILE_ATTRIBUTES) |
| 454 | goto handle_status_error; |
| 455 | |
| 456 | // Handle reparse points. |
| 457 | if (attr & FILE_ATTRIBUTE_REPARSE_POINT) { |
Michael J. Spencer | 513f1b6 | 2011-12-12 06:03:33 +0000 | [diff] [blame] | 458 | ScopedFileHandle h( |
Michael J. Spencer | db5576a | 2010-12-04 00:32:40 +0000 | [diff] [blame] | 459 | ::CreateFileW(path_utf16.begin(), |
| 460 | 0, // Attributes only. |
| 461 | FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE, |
| 462 | NULL, |
| 463 | OPEN_EXISTING, |
| 464 | FILE_FLAG_BACKUP_SEMANTICS, |
| 465 | 0)); |
Michael J. Spencer | 513f1b6 | 2011-12-12 06:03:33 +0000 | [diff] [blame] | 466 | if (!h) |
Michael J. Spencer | db5576a | 2010-12-04 00:32:40 +0000 | [diff] [blame] | 467 | goto handle_status_error; |
| 468 | } |
| 469 | |
| 470 | if (attr & FILE_ATTRIBUTE_DIRECTORY) |
| 471 | result = file_status(file_type::directory_file); |
Michael J. Spencer | 203d780 | 2011-12-12 06:04:28 +0000 | [diff] [blame] | 472 | else { |
Michael J. Spencer | db5576a | 2010-12-04 00:32:40 +0000 | [diff] [blame] | 473 | result = file_status(file_type::regular_file); |
Michael J. Spencer | 203d780 | 2011-12-12 06:04:28 +0000 | [diff] [blame] | 474 | ScopedFileHandle h( |
| 475 | ::CreateFileW(path_utf16.begin(), |
| 476 | 0, // Attributes only. |
| 477 | FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE, |
| 478 | NULL, |
| 479 | OPEN_EXISTING, |
| 480 | FILE_FLAG_BACKUP_SEMANTICS, |
| 481 | 0)); |
| 482 | if (!h) |
| 483 | goto handle_status_error; |
| 484 | BY_HANDLE_FILE_INFORMATION Info; |
| 485 | if (!::GetFileInformationByHandle(h, &Info)) |
| 486 | goto handle_status_error; |
| 487 | result.FileIndexHigh = Info.nFileIndexHigh; |
| 488 | result.FileIndexLow = Info.nFileIndexLow; |
| 489 | result.FileSizeHigh = Info.nFileSizeHigh; |
| 490 | result.FileSizeLow = Info.nFileSizeLow; |
| 491 | result.LastWriteTimeHigh = Info.ftLastWriteTime.dwHighDateTime; |
| 492 | result.LastWriteTimeLow = Info.ftLastWriteTime.dwLowDateTime; |
| 493 | result.VolumeSerialNumber = Info.dwVolumeSerialNumber; |
| 494 | } |
Michael J. Spencer | db5576a | 2010-12-04 00:32:40 +0000 | [diff] [blame] | 495 | |
David Blaikie | 18544b9 | 2012-02-09 19:24:12 +0000 | [diff] [blame] | 496 | return error_code::success(); |
Michael J. Spencer | db5576a | 2010-12-04 00:32:40 +0000 | [diff] [blame] | 497 | |
| 498 | handle_status_error: |
| 499 | error_code ec = windows_error(::GetLastError()); |
| 500 | if (ec == windows_error::file_not_found || |
| 501 | ec == windows_error::path_not_found) |
| 502 | result = file_status(file_type::file_not_found); |
| 503 | else if (ec == windows_error::sharing_violation) |
| 504 | result = file_status(file_type::type_unknown); |
| 505 | else { |
| 506 | result = file_status(file_type::status_error); |
| 507 | return ec; |
| 508 | } |
| 509 | |
David Blaikie | 18544b9 | 2012-02-09 19:24:12 +0000 | [diff] [blame] | 510 | return error_code::success(); |
Michael J. Spencer | db5576a | 2010-12-04 00:32:40 +0000 | [diff] [blame] | 511 | } |
| 512 | |
Nick Kledzik | 18497e9 | 2012-06-20 00:28:54 +0000 | [diff] [blame] | 513 | |
| 514 | // Modifies permissions on a file. |
| 515 | error_code permissions(const Twine &path, perms prms) { |
| 516 | #if 0 // verify code below before enabling: |
| 517 | // If the permissions bits are not trying to modify |
| 518 | // "write" permissions, there is nothing to do. |
| 519 | if (!(prms & (owner_write|group_write|others_write))) |
| 520 | return error_code::success(); |
| 521 | |
| 522 | SmallString<128> path_storage; |
| 523 | SmallVector<wchar_t, 128> path_utf16; |
| 524 | |
| 525 | if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage), |
| 526 | path_utf16)) |
| 527 | return ec; |
| 528 | |
| 529 | DWORD attributes = ::GetFileAttributesW(path_utf16.begin()); |
| 530 | |
| 531 | if (prms & add_perms) { |
| 532 | attributes &= ~FILE_ATTRIBUTE_READONLY; |
| 533 | } |
| 534 | else if (prms & remove_perms) { |
| 535 | attributes |= FILE_ATTRIBUTE_READONLY; |
| 536 | } |
| 537 | else { |
| 538 | assert(0 && "neither add_perms or remove_perms is set"); |
| 539 | } |
| 540 | |
| 541 | if ( ! ::SetFileAttributesW(path_utf16.begin(), attributes)) |
| 542 | return windows_error(::GetLastError()); |
| 543 | #endif |
| 544 | return error_code::success(); |
| 545 | } |
| 546 | |
| 547 | |
Eric Christopher | b6148ed | 2012-05-11 00:07:44 +0000 | [diff] [blame] | 548 | // FIXME: mode should be used here and default to user r/w only, |
| 549 | // it currently comes in as a UNIX mode. |
Michael J. Spencer | 4571040 | 2010-12-03 01:21:28 +0000 | [diff] [blame] | 550 | error_code unique_file(const Twine &model, int &result_fd, |
Eric Christopher | b6148ed | 2012-05-11 00:07:44 +0000 | [diff] [blame] | 551 | SmallVectorImpl<char> &result_path, |
| 552 | bool makeAbsolute, unsigned mode) { |
Michael J. Spencer | 4571040 | 2010-12-03 01:21:28 +0000 | [diff] [blame] | 553 | // Use result_path as temp storage. |
| 554 | result_path.set_size(0); |
| 555 | StringRef m = model.toStringRef(result_path); |
| 556 | |
| 557 | SmallVector<wchar_t, 128> model_utf16; |
| 558 | if (error_code ec = UTF8ToUTF16(m, model_utf16)) return ec; |
| 559 | |
Argyrios Kyrtzidis | 348937d | 2011-07-28 00:29:20 +0000 | [diff] [blame] | 560 | if (makeAbsolute) { |
| 561 | // Make model absolute by prepending a temp directory if it's not already. |
| 562 | bool absolute = path::is_absolute(m); |
Michael J. Spencer | 0a7625d | 2011-12-08 22:50:09 +0000 | [diff] [blame] | 563 | |
Argyrios Kyrtzidis | 348937d | 2011-07-28 00:29:20 +0000 | [diff] [blame] | 564 | if (!absolute) { |
| 565 | SmallVector<wchar_t, 64> temp_dir; |
| 566 | if (error_code ec = TempDir(temp_dir)) return ec; |
| 567 | // Handle c: by removing it. |
| 568 | if (model_utf16.size() > 2 && model_utf16[1] == L':') { |
| 569 | model_utf16.erase(model_utf16.begin(), model_utf16.begin() + 2); |
| 570 | } |
| 571 | model_utf16.insert(model_utf16.begin(), temp_dir.begin(), temp_dir.end()); |
Michael J. Spencer | 4571040 | 2010-12-03 01:21:28 +0000 | [diff] [blame] | 572 | } |
Michael J. Spencer | 4571040 | 2010-12-03 01:21:28 +0000 | [diff] [blame] | 573 | } |
| 574 | |
| 575 | // Replace '%' with random chars. From here on, DO NOT modify model. It may be |
| 576 | // needed if the randomly chosen path already exists. |
| 577 | SmallVector<wchar_t, 128> random_path_utf16; |
| 578 | |
| 579 | // Get a Crypto Provider for CryptGenRandom. |
Michael J. Spencer | 39c4621 | 2010-12-06 04:28:13 +0000 | [diff] [blame] | 580 | HCRYPTPROV HCPC; |
| 581 | if (!::CryptAcquireContextW(&HCPC, |
Michael J. Spencer | 66a1f86 | 2010-12-04 18:45:32 +0000 | [diff] [blame] | 582 | NULL, |
| 583 | NULL, |
| 584 | PROV_RSA_FULL, |
NAKAMURA Takumi | 8a07451 | 2011-01-17 22:41:34 +0000 | [diff] [blame] | 585 | CRYPT_VERIFYCONTEXT)) |
Michael J. Spencer | 66a1f86 | 2010-12-04 18:45:32 +0000 | [diff] [blame] | 586 | return windows_error(::GetLastError()); |
Michael J. Spencer | 39c4621 | 2010-12-06 04:28:13 +0000 | [diff] [blame] | 587 | ScopedCryptContext CryptoProvider(HCPC); |
Michael J. Spencer | 4571040 | 2010-12-03 01:21:28 +0000 | [diff] [blame] | 588 | |
| 589 | retry_random_path: |
| 590 | random_path_utf16.set_size(0); |
| 591 | for (SmallVectorImpl<wchar_t>::const_iterator i = model_utf16.begin(), |
| 592 | e = model_utf16.end(); |
| 593 | i != e; ++i) { |
| 594 | if (*i == L'%') { |
| 595 | BYTE val = 0; |
| 596 | if (!::CryptGenRandom(CryptoProvider, 1, &val)) |
Michael J. Spencer | 66a1f86 | 2010-12-04 18:45:32 +0000 | [diff] [blame] | 597 | return windows_error(::GetLastError()); |
Michael J. Spencer | 4571040 | 2010-12-03 01:21:28 +0000 | [diff] [blame] | 598 | random_path_utf16.push_back("0123456789abcdef"[val & 15]); |
| 599 | } |
| 600 | else |
| 601 | random_path_utf16.push_back(*i); |
| 602 | } |
| 603 | // Make random_path_utf16 null terminated. |
| 604 | random_path_utf16.push_back(0); |
| 605 | random_path_utf16.pop_back(); |
| 606 | |
Michael J. Spencer | 20a11b2 | 2013-03-12 22:32:39 +0000 | [diff] [blame] | 607 | // Make sure we don't fall into an infinite loop by constantly trying |
| 608 | // to create the parent path. |
| 609 | bool TriedToCreateParent = false; |
| 610 | |
Michael J. Spencer | 4571040 | 2010-12-03 01:21:28 +0000 | [diff] [blame] | 611 | // Try to create + open the path. |
| 612 | retry_create_file: |
| 613 | HANDLE TempFileHandle = ::CreateFileW(random_path_utf16.begin(), |
| 614 | GENERIC_READ | GENERIC_WRITE, |
| 615 | FILE_SHARE_READ, |
| 616 | NULL, |
| 617 | // Return ERROR_FILE_EXISTS if the file |
| 618 | // already exists. |
| 619 | CREATE_NEW, |
| 620 | FILE_ATTRIBUTE_TEMPORARY, |
| 621 | NULL); |
| 622 | if (TempFileHandle == INVALID_HANDLE_VALUE) { |
| 623 | // If the file existed, try again, otherwise, error. |
Michael J. Spencer | 66a1f86 | 2010-12-04 18:45:32 +0000 | [diff] [blame] | 624 | error_code ec = windows_error(::GetLastError()); |
| 625 | if (ec == windows_error::file_exists) |
Michael J. Spencer | 4571040 | 2010-12-03 01:21:28 +0000 | [diff] [blame] | 626 | goto retry_random_path; |
| 627 | // Check for non-existing parent directories. |
Michael J. Spencer | 20a11b2 | 2013-03-12 22:32:39 +0000 | [diff] [blame] | 628 | if (ec == windows_error::path_not_found && !TriedToCreateParent) { |
| 629 | TriedToCreateParent = true; |
| 630 | |
Michael J. Spencer | 4571040 | 2010-12-03 01:21:28 +0000 | [diff] [blame] | 631 | // Create the directories using result_path as temp storage. |
| 632 | if (error_code ec = UTF16ToUTF8(random_path_utf16.begin(), |
| 633 | random_path_utf16.size(), result_path)) |
| 634 | return ec; |
| 635 | StringRef p(result_path.begin(), result_path.size()); |
| 636 | SmallString<64> dir_to_create; |
| 637 | for (path::const_iterator i = path::begin(p), |
| 638 | e = --path::end(p); i != e; ++i) { |
Michael J. Spencer | 1e090f0 | 2010-12-07 03:57:37 +0000 | [diff] [blame] | 639 | path::append(dir_to_create, *i); |
Michael J. Spencer | 4571040 | 2010-12-03 01:21:28 +0000 | [diff] [blame] | 640 | bool Exists; |
| 641 | if (error_code ec = exists(Twine(dir_to_create), Exists)) return ec; |
| 642 | if (!Exists) { |
| 643 | // If c: doesn't exist, bail. |
| 644 | if (i->endswith(":")) |
| 645 | return ec; |
| 646 | |
| 647 | SmallVector<wchar_t, 64> dir_to_create_utf16; |
| 648 | if (error_code ec = UTF8ToUTF16(dir_to_create, dir_to_create_utf16)) |
| 649 | return ec; |
| 650 | |
| 651 | // Create the directory. |
| 652 | if (!::CreateDirectoryW(dir_to_create_utf16.begin(), NULL)) |
Michael J. Spencer | 66a1f86 | 2010-12-04 18:45:32 +0000 | [diff] [blame] | 653 | return windows_error(::GetLastError()); |
Michael J. Spencer | 4571040 | 2010-12-03 01:21:28 +0000 | [diff] [blame] | 654 | } |
| 655 | } |
| 656 | goto retry_create_file; |
| 657 | } |
| 658 | return ec; |
| 659 | } |
| 660 | |
| 661 | // Set result_path to the utf-8 representation of the path. |
| 662 | if (error_code ec = UTF16ToUTF8(random_path_utf16.begin(), |
| 663 | random_path_utf16.size(), result_path)) { |
| 664 | ::CloseHandle(TempFileHandle); |
| 665 | ::DeleteFileW(random_path_utf16.begin()); |
| 666 | return ec; |
| 667 | } |
| 668 | |
| 669 | // Convert the Windows API file handle into a C-runtime handle. |
| 670 | int fd = ::_open_osfhandle(intptr_t(TempFileHandle), 0); |
| 671 | if (fd == -1) { |
| 672 | ::CloseHandle(TempFileHandle); |
| 673 | ::DeleteFileW(random_path_utf16.begin()); |
| 674 | // MSDN doesn't say anything about _open_osfhandle setting errno or |
| 675 | // GetLastError(), so just return invalid_handle. |
Michael J. Spencer | 66a1f86 | 2010-12-04 18:45:32 +0000 | [diff] [blame] | 676 | return windows_error::invalid_handle; |
Michael J. Spencer | 4571040 | 2010-12-03 01:21:28 +0000 | [diff] [blame] | 677 | } |
| 678 | |
| 679 | result_fd = fd; |
David Blaikie | 18544b9 | 2012-02-09 19:24:12 +0000 | [diff] [blame] | 680 | return error_code::success(); |
Michael J. Spencer | 4571040 | 2010-12-03 01:21:28 +0000 | [diff] [blame] | 681 | } |
Michael J. Spencer | 7ecd94c | 2010-12-06 04:28:42 +0000 | [diff] [blame] | 682 | |
Michael J. Spencer | ee1699c | 2011-01-15 18:52:33 +0000 | [diff] [blame] | 683 | error_code get_magic(const Twine &path, uint32_t len, |
| 684 | SmallVectorImpl<char> &result) { |
| 685 | SmallString<128> path_storage; |
| 686 | SmallVector<wchar_t, 128> path_utf16; |
| 687 | result.set_size(0); |
| 688 | |
| 689 | // Convert path to UTF-16. |
| 690 | if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage), |
| 691 | path_utf16)) |
| 692 | return ec; |
| 693 | |
| 694 | // Open file. |
| 695 | HANDLE file = ::CreateFileW(c_str(path_utf16), |
| 696 | GENERIC_READ, |
| 697 | FILE_SHARE_READ, |
| 698 | NULL, |
| 699 | OPEN_EXISTING, |
| 700 | FILE_ATTRIBUTE_READONLY, |
| 701 | NULL); |
| 702 | if (file == INVALID_HANDLE_VALUE) |
| 703 | return windows_error(::GetLastError()); |
| 704 | |
| 705 | // Allocate buffer. |
| 706 | result.reserve(len); |
| 707 | |
| 708 | // Get magic! |
| 709 | DWORD bytes_read = 0; |
| 710 | BOOL read_success = ::ReadFile(file, result.data(), len, &bytes_read, NULL); |
| 711 | error_code ec = windows_error(::GetLastError()); |
| 712 | ::CloseHandle(file); |
| 713 | if (!read_success || (bytes_read != len)) { |
| 714 | // Set result size to the number of bytes read if it's valid. |
NAKAMURA Takumi | 3e76b50 | 2011-03-07 00:12:53 +0000 | [diff] [blame] | 715 | if (bytes_read <= len) |
Michael J. Spencer | ee1699c | 2011-01-15 18:52:33 +0000 | [diff] [blame] | 716 | result.set_size(bytes_read); |
| 717 | // ERROR_HANDLE_EOF is mapped to errc::value_too_large. |
| 718 | return ec; |
| 719 | } |
| 720 | |
| 721 | result.set_size(len); |
David Blaikie | 18544b9 | 2012-02-09 19:24:12 +0000 | [diff] [blame] | 722 | return error_code::success(); |
Michael J. Spencer | ee1699c | 2011-01-15 18:52:33 +0000 | [diff] [blame] | 723 | } |
| 724 | |
Michael J. Spencer | 42ad29f | 2013-03-14 00:20:10 +0000 | [diff] [blame] | 725 | error_code mapped_file_region::init(int FD, bool CloseFD, uint64_t Offset) { |
Michael J. Spencer | ef2284f | 2012-08-15 19:05:47 +0000 | [diff] [blame] | 726 | FileDescriptor = FD; |
| 727 | // Make sure that the requested size fits within SIZE_T. |
| 728 | if (Size > std::numeric_limits<SIZE_T>::max()) { |
Michael J. Spencer | d932d41 | 2013-03-15 19:25:47 +0000 | [diff] [blame] | 729 | if (FileDescriptor) { |
Michael J. Spencer | 42ad29f | 2013-03-14 00:20:10 +0000 | [diff] [blame] | 730 | if (CloseFD) |
| 731 | _close(FileDescriptor); |
Michael J. Spencer | d932d41 | 2013-03-15 19:25:47 +0000 | [diff] [blame] | 732 | } else |
Michael J. Spencer | ef2284f | 2012-08-15 19:05:47 +0000 | [diff] [blame] | 733 | ::CloseHandle(FileHandle); |
| 734 | return make_error_code(errc::invalid_argument); |
| 735 | } |
| 736 | |
| 737 | DWORD flprotect; |
| 738 | switch (Mode) { |
| 739 | case readonly: flprotect = PAGE_READONLY; break; |
| 740 | case readwrite: flprotect = PAGE_READWRITE; break; |
| 741 | case priv: flprotect = PAGE_WRITECOPY; break; |
| 742 | default: llvm_unreachable("invalid mapping mode"); |
| 743 | } |
| 744 | |
| 745 | FileMappingHandle = ::CreateFileMapping(FileHandle, |
| 746 | 0, |
| 747 | flprotect, |
| 748 | Size >> 32, |
| 749 | Size & 0xffffffff, |
| 750 | 0); |
| 751 | if (FileMappingHandle == NULL) { |
| 752 | error_code ec = windows_error(GetLastError()); |
Michael J. Spencer | d932d41 | 2013-03-15 19:25:47 +0000 | [diff] [blame] | 753 | if (FileDescriptor) { |
Michael J. Spencer | 42ad29f | 2013-03-14 00:20:10 +0000 | [diff] [blame] | 754 | if (CloseFD) |
| 755 | _close(FileDescriptor); |
Michael J. Spencer | d932d41 | 2013-03-15 19:25:47 +0000 | [diff] [blame] | 756 | } else |
Michael J. Spencer | ef2284f | 2012-08-15 19:05:47 +0000 | [diff] [blame] | 757 | ::CloseHandle(FileHandle); |
| 758 | return ec; |
| 759 | } |
| 760 | |
| 761 | DWORD dwDesiredAccess; |
| 762 | switch (Mode) { |
| 763 | case readonly: dwDesiredAccess = FILE_MAP_READ; break; |
| 764 | case readwrite: dwDesiredAccess = FILE_MAP_WRITE; break; |
| 765 | case priv: dwDesiredAccess = FILE_MAP_COPY; break; |
| 766 | default: llvm_unreachable("invalid mapping mode"); |
| 767 | } |
| 768 | Mapping = ::MapViewOfFile(FileMappingHandle, |
| 769 | dwDesiredAccess, |
| 770 | Offset >> 32, |
| 771 | Offset & 0xffffffff, |
| 772 | Size); |
| 773 | if (Mapping == NULL) { |
| 774 | error_code ec = windows_error(GetLastError()); |
| 775 | ::CloseHandle(FileMappingHandle); |
Michael J. Spencer | d932d41 | 2013-03-15 19:25:47 +0000 | [diff] [blame] | 776 | if (FileDescriptor) { |
Michael J. Spencer | 42ad29f | 2013-03-14 00:20:10 +0000 | [diff] [blame] | 777 | if (CloseFD) |
| 778 | _close(FileDescriptor); |
Michael J. Spencer | d932d41 | 2013-03-15 19:25:47 +0000 | [diff] [blame] | 779 | } else |
Michael J. Spencer | ef2284f | 2012-08-15 19:05:47 +0000 | [diff] [blame] | 780 | ::CloseHandle(FileHandle); |
| 781 | return ec; |
| 782 | } |
| 783 | |
| 784 | if (Size == 0) { |
| 785 | MEMORY_BASIC_INFORMATION mbi; |
| 786 | SIZE_T Result = VirtualQuery(Mapping, &mbi, sizeof(mbi)); |
| 787 | if (Result == 0) { |
| 788 | error_code ec = windows_error(GetLastError()); |
| 789 | ::UnmapViewOfFile(Mapping); |
| 790 | ::CloseHandle(FileMappingHandle); |
Michael J. Spencer | d932d41 | 2013-03-15 19:25:47 +0000 | [diff] [blame] | 791 | if (FileDescriptor) { |
Michael J. Spencer | 42ad29f | 2013-03-14 00:20:10 +0000 | [diff] [blame] | 792 | if (CloseFD) |
| 793 | _close(FileDescriptor); |
Michael J. Spencer | d932d41 | 2013-03-15 19:25:47 +0000 | [diff] [blame] | 794 | } else |
Michael J. Spencer | ef2284f | 2012-08-15 19:05:47 +0000 | [diff] [blame] | 795 | ::CloseHandle(FileHandle); |
| 796 | return ec; |
| 797 | } |
| 798 | Size = mbi.RegionSize; |
| 799 | } |
Michael J. Spencer | 42ad29f | 2013-03-14 00:20:10 +0000 | [diff] [blame] | 800 | |
| 801 | // Close all the handles except for the view. It will keep the other handles |
| 802 | // alive. |
| 803 | ::CloseHandle(FileMappingHandle); |
Michael J. Spencer | d932d41 | 2013-03-15 19:25:47 +0000 | [diff] [blame] | 804 | if (FileDescriptor) { |
Michael J. Spencer | 42ad29f | 2013-03-14 00:20:10 +0000 | [diff] [blame] | 805 | if (CloseFD) |
| 806 | _close(FileDescriptor); // Also closes FileHandle. |
Michael J. Spencer | d932d41 | 2013-03-15 19:25:47 +0000 | [diff] [blame] | 807 | } else |
Michael J. Spencer | 42ad29f | 2013-03-14 00:20:10 +0000 | [diff] [blame] | 808 | ::CloseHandle(FileHandle); |
Michael J. Spencer | ef2284f | 2012-08-15 19:05:47 +0000 | [diff] [blame] | 809 | return error_code::success(); |
| 810 | } |
| 811 | |
| 812 | mapped_file_region::mapped_file_region(const Twine &path, |
| 813 | mapmode mode, |
| 814 | uint64_t length, |
| 815 | uint64_t offset, |
| 816 | error_code &ec) |
| 817 | : Mode(mode) |
| 818 | , Size(length) |
| 819 | , Mapping() |
| 820 | , FileDescriptor() |
| 821 | , FileHandle(INVALID_HANDLE_VALUE) |
| 822 | , FileMappingHandle() { |
| 823 | SmallString<128> path_storage; |
| 824 | SmallVector<wchar_t, 128> path_utf16; |
| 825 | |
| 826 | // Convert path to UTF-16. |
Nico Weber | eada11b | 2012-09-25 05:24:16 +0000 | [diff] [blame] | 827 | if ((ec = UTF8ToUTF16(path.toStringRef(path_storage), path_utf16))) |
Michael J. Spencer | ef2284f | 2012-08-15 19:05:47 +0000 | [diff] [blame] | 828 | return; |
| 829 | |
| 830 | // Get file handle for creating a file mapping. |
| 831 | FileHandle = ::CreateFileW(c_str(path_utf16), |
| 832 | Mode == readonly ? GENERIC_READ |
| 833 | : GENERIC_READ | GENERIC_WRITE, |
| 834 | Mode == readonly ? FILE_SHARE_READ |
| 835 | : 0, |
| 836 | 0, |
| 837 | Mode == readonly ? OPEN_EXISTING |
| 838 | : OPEN_ALWAYS, |
| 839 | Mode == readonly ? FILE_ATTRIBUTE_READONLY |
| 840 | : FILE_ATTRIBUTE_NORMAL, |
| 841 | 0); |
| 842 | if (FileHandle == INVALID_HANDLE_VALUE) { |
| 843 | ec = windows_error(::GetLastError()); |
| 844 | return; |
| 845 | } |
| 846 | |
| 847 | FileDescriptor = 0; |
Michael J. Spencer | 42ad29f | 2013-03-14 00:20:10 +0000 | [diff] [blame] | 848 | ec = init(FileDescriptor, true, offset); |
Michael J. Spencer | ef2284f | 2012-08-15 19:05:47 +0000 | [diff] [blame] | 849 | if (ec) { |
| 850 | Mapping = FileMappingHandle = 0; |
| 851 | FileHandle = INVALID_HANDLE_VALUE; |
| 852 | FileDescriptor = 0; |
| 853 | } |
| 854 | } |
| 855 | |
| 856 | mapped_file_region::mapped_file_region(int fd, |
Michael J. Spencer | 42ad29f | 2013-03-14 00:20:10 +0000 | [diff] [blame] | 857 | bool closefd, |
Michael J. Spencer | ef2284f | 2012-08-15 19:05:47 +0000 | [diff] [blame] | 858 | mapmode mode, |
| 859 | uint64_t length, |
| 860 | uint64_t offset, |
| 861 | error_code &ec) |
| 862 | : Mode(mode) |
| 863 | , Size(length) |
| 864 | , Mapping() |
| 865 | , FileDescriptor(fd) |
| 866 | , FileHandle(INVALID_HANDLE_VALUE) |
| 867 | , FileMappingHandle() { |
| 868 | FileHandle = reinterpret_cast<HANDLE>(_get_osfhandle(fd)); |
| 869 | if (FileHandle == INVALID_HANDLE_VALUE) { |
Michael J. Spencer | 42ad29f | 2013-03-14 00:20:10 +0000 | [diff] [blame] | 870 | if (closefd) |
| 871 | _close(FileDescriptor); |
Michael J. Spencer | ef2284f | 2012-08-15 19:05:47 +0000 | [diff] [blame] | 872 | FileDescriptor = 0; |
| 873 | ec = make_error_code(errc::bad_file_descriptor); |
| 874 | return; |
| 875 | } |
| 876 | |
Michael J. Spencer | 42ad29f | 2013-03-14 00:20:10 +0000 | [diff] [blame] | 877 | ec = init(FileDescriptor, closefd, offset); |
Michael J. Spencer | ef2284f | 2012-08-15 19:05:47 +0000 | [diff] [blame] | 878 | if (ec) { |
| 879 | Mapping = FileMappingHandle = 0; |
| 880 | FileHandle = INVALID_HANDLE_VALUE; |
| 881 | FileDescriptor = 0; |
| 882 | } |
| 883 | } |
| 884 | |
| 885 | mapped_file_region::~mapped_file_region() { |
| 886 | if (Mapping) |
| 887 | ::UnmapViewOfFile(Mapping); |
Michael J. Spencer | ef2284f | 2012-08-15 19:05:47 +0000 | [diff] [blame] | 888 | } |
| 889 | |
Chandler Carruth | f12e3a6 | 2012-11-30 11:45:22 +0000 | [diff] [blame] | 890 | #if LLVM_HAS_RVALUE_REFERENCES |
Michael J. Spencer | ef2284f | 2012-08-15 19:05:47 +0000 | [diff] [blame] | 891 | mapped_file_region::mapped_file_region(mapped_file_region &&other) |
| 892 | : Mode(other.Mode) |
| 893 | , Size(other.Size) |
| 894 | , Mapping(other.Mapping) |
| 895 | , FileDescriptor(other.FileDescriptor) |
| 896 | , FileHandle(other.FileHandle) |
| 897 | , FileMappingHandle(other.FileMappingHandle) { |
| 898 | other.Mapping = other.FileMappingHandle = 0; |
| 899 | other.FileHandle = INVALID_HANDLE_VALUE; |
| 900 | other.FileDescriptor = 0; |
| 901 | } |
| 902 | #endif |
| 903 | |
| 904 | mapped_file_region::mapmode mapped_file_region::flags() const { |
| 905 | assert(Mapping && "Mapping failed but used anyway!"); |
| 906 | return Mode; |
| 907 | } |
| 908 | |
| 909 | uint64_t mapped_file_region::size() const { |
| 910 | assert(Mapping && "Mapping failed but used anyway!"); |
| 911 | return Size; |
| 912 | } |
| 913 | |
| 914 | char *mapped_file_region::data() const { |
| 915 | assert(Mode != readonly && "Cannot get non const data for readonly mapping!"); |
| 916 | assert(Mapping && "Mapping failed but used anyway!"); |
| 917 | return reinterpret_cast<char*>(Mapping); |
| 918 | } |
| 919 | |
| 920 | const char *mapped_file_region::const_data() const { |
| 921 | assert(Mapping && "Mapping failed but used anyway!"); |
| 922 | return reinterpret_cast<const char*>(Mapping); |
| 923 | } |
| 924 | |
| 925 | int mapped_file_region::alignment() { |
| 926 | SYSTEM_INFO SysInfo; |
| 927 | ::GetSystemInfo(&SysInfo); |
| 928 | return SysInfo.dwAllocationGranularity; |
| 929 | } |
| 930 | |
Michael J. Spencer | 0a7625d | 2011-12-08 22:50:09 +0000 | [diff] [blame] | 931 | error_code detail::directory_iterator_construct(detail::DirIterState &it, |
| 932 | StringRef path){ |
Michael J. Spencer | 7ecd94c | 2010-12-06 04:28:42 +0000 | [diff] [blame] | 933 | SmallVector<wchar_t, 128> path_utf16; |
| 934 | |
| 935 | if (error_code ec = UTF8ToUTF16(path, |
| 936 | path_utf16)) |
| 937 | return ec; |
| 938 | |
| 939 | // Convert path to the format that Windows is happy with. |
| 940 | if (path_utf16.size() > 0 && |
| 941 | !is_separator(path_utf16[path.size() - 1]) && |
| 942 | path_utf16[path.size() - 1] != L':') { |
| 943 | path_utf16.push_back(L'\\'); |
| 944 | path_utf16.push_back(L'*'); |
| 945 | } else { |
| 946 | path_utf16.push_back(L'*'); |
| 947 | } |
| 948 | |
| 949 | // Get the first directory entry. |
| 950 | WIN32_FIND_DATAW FirstFind; |
Michael J. Spencer | 751e9aa | 2010-12-09 17:37:18 +0000 | [diff] [blame] | 951 | ScopedFindHandle FindHandle(::FindFirstFileW(c_str(path_utf16), &FirstFind)); |
Michael J. Spencer | 7ecd94c | 2010-12-06 04:28:42 +0000 | [diff] [blame] | 952 | if (!FindHandle) |
| 953 | return windows_error(::GetLastError()); |
| 954 | |
Michael J. Spencer | 98879d7 | 2011-01-05 16:39:30 +0000 | [diff] [blame] | 955 | size_t FilenameLen = ::wcslen(FirstFind.cFileName); |
| 956 | while ((FilenameLen == 1 && FirstFind.cFileName[0] == L'.') || |
| 957 | (FilenameLen == 2 && FirstFind.cFileName[0] == L'.' && |
| 958 | FirstFind.cFileName[1] == L'.')) |
| 959 | if (!::FindNextFileW(FindHandle, &FirstFind)) { |
| 960 | error_code ec = windows_error(::GetLastError()); |
| 961 | // Check for end. |
| 962 | if (ec == windows_error::no_more_files) |
Michael J. Spencer | 0a7625d | 2011-12-08 22:50:09 +0000 | [diff] [blame] | 963 | return detail::directory_iterator_destruct(it); |
Michael J. Spencer | 98879d7 | 2011-01-05 16:39:30 +0000 | [diff] [blame] | 964 | return ec; |
| 965 | } else |
| 966 | FilenameLen = ::wcslen(FirstFind.cFileName); |
| 967 | |
Michael J. Spencer | 7ecd94c | 2010-12-06 04:28:42 +0000 | [diff] [blame] | 968 | // Construct the current directory entry. |
Michael J. Spencer | 98879d7 | 2011-01-05 16:39:30 +0000 | [diff] [blame] | 969 | SmallString<128> directory_entry_name_utf8; |
Michael J. Spencer | 7ecd94c | 2010-12-06 04:28:42 +0000 | [diff] [blame] | 970 | if (error_code ec = UTF16ToUTF8(FirstFind.cFileName, |
| 971 | ::wcslen(FirstFind.cFileName), |
Michael J. Spencer | 98879d7 | 2011-01-05 16:39:30 +0000 | [diff] [blame] | 972 | directory_entry_name_utf8)) |
Michael J. Spencer | 7ecd94c | 2010-12-06 04:28:42 +0000 | [diff] [blame] | 973 | return ec; |
| 974 | |
| 975 | it.IterationHandle = intptr_t(FindHandle.take()); |
Michael J. Spencer | 98879d7 | 2011-01-05 16:39:30 +0000 | [diff] [blame] | 976 | SmallString<128> directory_entry_path(path); |
| 977 | path::append(directory_entry_path, directory_entry_name_utf8.str()); |
| 978 | it.CurrentEntry = directory_entry(directory_entry_path.str()); |
Michael J. Spencer | 7ecd94c | 2010-12-06 04:28:42 +0000 | [diff] [blame] | 979 | |
David Blaikie | 18544b9 | 2012-02-09 19:24:12 +0000 | [diff] [blame] | 980 | return error_code::success(); |
Michael J. Spencer | 7ecd94c | 2010-12-06 04:28:42 +0000 | [diff] [blame] | 981 | } |
| 982 | |
Michael J. Spencer | 0a7625d | 2011-12-08 22:50:09 +0000 | [diff] [blame] | 983 | error_code detail::directory_iterator_destruct(detail::DirIterState &it) { |
Michael J. Spencer | 7ecd94c | 2010-12-06 04:28:42 +0000 | [diff] [blame] | 984 | if (it.IterationHandle != 0) |
| 985 | // Closes the handle if it's valid. |
| 986 | ScopedFindHandle close(HANDLE(it.IterationHandle)); |
| 987 | it.IterationHandle = 0; |
| 988 | it.CurrentEntry = directory_entry(); |
David Blaikie | 18544b9 | 2012-02-09 19:24:12 +0000 | [diff] [blame] | 989 | return error_code::success(); |
Michael J. Spencer | 7ecd94c | 2010-12-06 04:28:42 +0000 | [diff] [blame] | 990 | } |
| 991 | |
Michael J. Spencer | 0a7625d | 2011-12-08 22:50:09 +0000 | [diff] [blame] | 992 | error_code detail::directory_iterator_increment(detail::DirIterState &it) { |
Michael J. Spencer | 7ecd94c | 2010-12-06 04:28:42 +0000 | [diff] [blame] | 993 | WIN32_FIND_DATAW FindData; |
| 994 | if (!::FindNextFileW(HANDLE(it.IterationHandle), &FindData)) { |
| 995 | error_code ec = windows_error(::GetLastError()); |
| 996 | // Check for end. |
| 997 | if (ec == windows_error::no_more_files) |
Michael J. Spencer | 0a7625d | 2011-12-08 22:50:09 +0000 | [diff] [blame] | 998 | return detail::directory_iterator_destruct(it); |
Michael J. Spencer | 7ecd94c | 2010-12-06 04:28:42 +0000 | [diff] [blame] | 999 | return ec; |
| 1000 | } |
| 1001 | |
Michael J. Spencer | 98879d7 | 2011-01-05 16:39:30 +0000 | [diff] [blame] | 1002 | size_t FilenameLen = ::wcslen(FindData.cFileName); |
| 1003 | if ((FilenameLen == 1 && FindData.cFileName[0] == L'.') || |
| 1004 | (FilenameLen == 2 && FindData.cFileName[0] == L'.' && |
| 1005 | FindData.cFileName[1] == L'.')) |
| 1006 | return directory_iterator_increment(it); |
| 1007 | |
Michael J. Spencer | 7ecd94c | 2010-12-06 04:28:42 +0000 | [diff] [blame] | 1008 | SmallString<128> directory_entry_path_utf8; |
| 1009 | if (error_code ec = UTF16ToUTF8(FindData.cFileName, |
| 1010 | ::wcslen(FindData.cFileName), |
| 1011 | directory_entry_path_utf8)) |
| 1012 | return ec; |
| 1013 | |
| 1014 | it.CurrentEntry.replace_filename(Twine(directory_entry_path_utf8)); |
David Blaikie | 18544b9 | 2012-02-09 19:24:12 +0000 | [diff] [blame] | 1015 | return error_code::success(); |
Michael J. Spencer | 7ecd94c | 2010-12-06 04:28:42 +0000 | [diff] [blame] | 1016 | } |
| 1017 | |
Nick Kledzik | 18497e9 | 2012-06-20 00:28:54 +0000 | [diff] [blame] | 1018 | error_code map_file_pages(const Twine &path, off_t file_offset, size_t size, |
| 1019 | bool map_writable, void *&result) { |
| 1020 | assert(0 && "NOT IMPLEMENTED"); |
Francois Pichet | 5dc987a | 2012-06-20 04:08:49 +0000 | [diff] [blame] | 1021 | return windows_error::invalid_function; |
Nick Kledzik | 18497e9 | 2012-06-20 00:28:54 +0000 | [diff] [blame] | 1022 | } |
| 1023 | |
| 1024 | error_code unmap_file_pages(void *base, size_t size) { |
| 1025 | assert(0 && "NOT IMPLEMENTED"); |
Francois Pichet | 5dc987a | 2012-06-20 04:08:49 +0000 | [diff] [blame] | 1026 | return windows_error::invalid_function; |
Nick Kledzik | 18497e9 | 2012-06-20 00:28:54 +0000 | [diff] [blame] | 1027 | } |
| 1028 | |
| 1029 | |
| 1030 | |
Michael J. Spencer | 9fc1d9d | 2010-12-01 19:32:01 +0000 | [diff] [blame] | 1031 | } // end namespace fs |
Michael J. Spencer | ebad2f9 | 2010-11-29 22:28:51 +0000 | [diff] [blame] | 1032 | } // end namespace sys |
| 1033 | } // end namespace llvm |