unittests/Support/Path.cpp

   1 //===- llvm/unittest/Support/Path.cpp - Path tests ------------------------===//
   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 #include "llvm/Support/Path.h"
  11 #include "llvm/ADT/STLExtras.h"
  12 #include "llvm/Support/ConvertUTF.h"
  13 #include "llvm/Support/Errc.h"
  14 #include "llvm/Support/ErrorHandling.h"
  15 #include "llvm/Support/FileSystem.h"
  16 #include "llvm/Support/FileUtilities.h"
  17 #include "llvm/Support/MemoryBuffer.h"
  18 #include "llvm/Support/raw_ostream.h"
  19 #include "gtest/gtest.h"
  20
  21 #ifdef LLVM_ON_WIN32
  22 #include "llvm/ADT/ArrayRef.h"
  23 #include <windows.h>
  24 #include <winerror.h>
  25 #endif
  26
  27 #ifdef LLVM_ON_UNIX
  28 #include <sys/stat.h>
  29 #endif
  30
  31 using namespace llvm;
  32 using namespace llvm::sys;
  33
  34 #define ASSERT_NO_ERROR(x)                                                     \
  35   if (std::error_code ASSERT_NO_ERROR_ec = x) {                                \
  36     SmallString<128> MessageStorage;                                           \
  37     raw_svector_ostream Message(MessageStorage);                               \
  38     Message << #x ": did not return errc::success.\n"                          \
  39             << "error number: " << ASSERT_NO_ERROR_ec.value() << "\n"          \
  40             << "error message: " << ASSERT_NO_ERROR_ec.message() << "\n";      \
  41     GTEST_FATAL_FAILURE_(MessageStorage.c_str());                              \
  42   } else {                                                                     \
  43   }
  44
  45 namespace {
  46
  47 TEST(is_separator, Works) {
  48   EXPECT_TRUE(path::is_separator('/'));
  49   EXPECT_FALSE(path::is_separator('\0'));
  50   EXPECT_FALSE(path::is_separator('-'));
  51   EXPECT_FALSE(path::is_separator(' '));
  52
  53 #ifdef LLVM_ON_WIN32
  54   EXPECT_TRUE(path::is_separator('\\'));
  55 #else
  56   EXPECT_FALSE(path::is_separator('\\'));
  57 #endif
  58 }
  59
  60 TEST(Support, Path) {
  61   SmallVector<StringRef, 40> paths;
  62   paths.push_back("");
  63   paths.push_back(".");
  64   paths.push_back("..");
  65   paths.push_back("foo");
  66   paths.push_back("/");
  67   paths.push_back("/foo");
  68   paths.push_back("foo/");
  69   paths.push_back("/foo/");
  70   paths.push_back("foo/bar");
  71   paths.push_back("/foo/bar");
  72   paths.push_back("//net");
  73   paths.push_back("//net/foo");
  74   paths.push_back("///foo///");
  75   paths.push_back("///foo///bar");
  76   paths.push_back("/.");
  77   paths.push_back("./");
  78   paths.push_back("/..");
  79   paths.push_back("../");
  80   paths.push_back("foo/.");
  81   paths.push_back("foo/..");
  82   paths.push_back("foo/./");
  83   paths.push_back("foo/./bar");
  84   paths.push_back("foo/..");
  85   paths.push_back("foo/../");
  86   paths.push_back("foo/../bar");
  87   paths.push_back("c:");
  88   paths.push_back("c:/");
  89   paths.push_back("c:foo");
  90   paths.push_back("c:/foo");
  91   paths.push_back("c:foo/");
  92   paths.push_back("c:/foo/");
  93   paths.push_back("c:/foo/bar");
  94   paths.push_back("prn:");
  95   paths.push_back("c:\\");
  96   paths.push_back("c:foo");
  97   paths.push_back("c:\\foo");
  98   paths.push_back("c:foo\\");
  99   paths.push_back("c:\\foo\\");
 100   paths.push_back("c:\\foo/");
 101   paths.push_back("c:/foo\\bar");
 102
 103   SmallVector<StringRef, 5> ComponentStack;
 104   for (SmallVector<StringRef, 40>::const_iterator i = paths.begin(),
 105                                                   e = paths.end();
 106                                                   i != e;
 107                                                   ++i) {
 108     for (sys::path::const_iterator ci = sys::path::begin(*i),
 109                                    ce = sys::path::end(*i);
 110                                    ci != ce;
 111                                    ++ci) {
 112       ASSERT_FALSE(ci->empty());
 113       ComponentStack.push_back(*ci);
 114     }
 115
 116     for (sys::path::reverse_iterator ci = sys::path::rbegin(*i),
 117                                      ce = sys::path::rend(*i);
 118                                      ci != ce;
 119                                      ++ci) {
 120       ASSERT_TRUE(*ci == ComponentStack.back());
 121       ComponentStack.pop_back();
 122     }
 123     ASSERT_TRUE(ComponentStack.empty());
 124
 125     // Crash test most of the API - since we're iterating over all of our paths
 126     // here there isn't really anything reasonable to assert on in the results.
 127     (void)path::has_root_path(*i);
 128     (void)path::root_path(*i);
 129     (void)path::has_root_name(*i);
 130     (void)path::root_name(*i);
 131     (void)path::has_root_directory(*i);
 132     (void)path::root_directory(*i);
 133     (void)path::has_parent_path(*i);
 134     (void)path::parent_path(*i);
 135     (void)path::has_filename(*i);
 136     (void)path::filename(*i);
 137     (void)path::has_stem(*i);
 138     (void)path::stem(*i);
 139     (void)path::has_extension(*i);
 140     (void)path::extension(*i);
 141     (void)path::is_absolute(*i);
 142     (void)path::is_relative(*i);
 143
 144     SmallString<128> temp_store;
 145     temp_store = *i;
 146     ASSERT_NO_ERROR(fs::make_absolute(temp_store));
 147     temp_store = *i;
 148     path::remove_filename(temp_store);
 149
 150     temp_store = *i;
 151     path::replace_extension(temp_store, "ext");
 152     StringRef filename(temp_store.begin(), temp_store.size()), stem, ext;
 153     stem = path::stem(filename);
 154     ext  = path::extension(filename);
 155     EXPECT_EQ(*sys::path::rbegin(filename), (stem + ext).str());
 156
 157     path::native(*i, temp_store);
 158   }
 159
 160   SmallString<32> Relative("foo.cpp");
 161   ASSERT_NO_ERROR(sys::fs::make_absolute("/root", Relative));
 162   Relative[5] = '/'; // Fix up windows paths.
 163   ASSERT_EQ("/root/foo.cpp", Relative);
 164 }
 165
 166 TEST(Support, RelativePathIterator) {
 167   SmallString<64> Path(StringRef("c/d/e/foo.txt"));
 168   typedef SmallVector<StringRef, 4> PathComponents;
 169   PathComponents ExpectedPathComponents;
 170   PathComponents ActualPathComponents;
 171
 172   StringRef(Path).split(ExpectedPathComponents, '/');
 173
 174   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
 175        ++I) {
 176     ActualPathComponents.push_back(*I);
 177   }
 178
 179   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
 180
 181   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
 182     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
 183   }
 184 }
 185
 186 TEST(Support, RelativePathDotIterator) {
 187   SmallString<64> Path(StringRef(".c/.d/../."));
 188   typedef SmallVector<StringRef, 4> PathComponents;
 189   PathComponents ExpectedPathComponents;
 190   PathComponents ActualPathComponents;
 191
 192   StringRef(Path).split(ExpectedPathComponents, '/');
 193
 194   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
 195        ++I) {
 196     ActualPathComponents.push_back(*I);
 197   }
 198
 199   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
 200
 201   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
 202     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
 203   }
 204 }
 205
 206 TEST(Support, AbsolutePathIterator) {
 207   SmallString<64> Path(StringRef("/c/d/e/foo.txt"));
 208   typedef SmallVector<StringRef, 4> PathComponents;
 209   PathComponents ExpectedPathComponents;
 210   PathComponents ActualPathComponents;
 211
 212   StringRef(Path).split(ExpectedPathComponents, '/');
 213
 214   // The root path will also be a component when iterating
 215   ExpectedPathComponents[0] = "/";
 216
 217   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
 218        ++I) {
 219     ActualPathComponents.push_back(*I);
 220   }
 221
 222   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
 223
 224   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
 225     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
 226   }
 227 }
 228
 229 TEST(Support, AbsolutePathDotIterator) {
 230   SmallString<64> Path(StringRef("/.c/.d/../."));
 231   typedef SmallVector<StringRef, 4> PathComponents;
 232   PathComponents ExpectedPathComponents;
 233   PathComponents ActualPathComponents;
 234
 235   StringRef(Path).split(ExpectedPathComponents, '/');
 236
 237   // The root path will also be a component when iterating
 238   ExpectedPathComponents[0] = "/";
 239
 240   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
 241        ++I) {
 242     ActualPathComponents.push_back(*I);
 243   }
 244
 245   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
 246
 247   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
 248     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
 249   }
 250 }
 251
 252 #ifdef LLVM_ON_WIN32
 253 TEST(Support, AbsolutePathIteratorWin32) {
 254   SmallString<64> Path(StringRef("c:\\c\\e\\foo.txt"));
 255   typedef SmallVector<StringRef, 4> PathComponents;
 256   PathComponents ExpectedPathComponents;
 257   PathComponents ActualPathComponents;
 258
 259   StringRef(Path).split(ExpectedPathComponents, "\\");
 260
 261   // The root path (which comes after the drive name) will also be a component
 262   // when iterating.
 263   ExpectedPathComponents.insert(ExpectedPathComponents.begin()+1, "\\");
 264
 265   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
 266        ++I) {
 267     ActualPathComponents.push_back(*I);
 268   }
 269
 270   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
 271
 272   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
 273     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
 274   }
 275 }
 276 #endif // LLVM_ON_WIN32
 277
 278 TEST(Support, AbsolutePathIteratorEnd) {
 279   // Trailing slashes are converted to '.' unless they are part of the root path.
 280   SmallVector<StringRef, 4> Paths;
 281   Paths.push_back("/foo/");
 282   Paths.push_back("/foo//");
 283   Paths.push_back("//net//");
 284 #ifdef LLVM_ON_WIN32
 285   Paths.push_back("c:\\\\");
 286 #endif
 287
 288   for (StringRef Path : Paths) {
 289     StringRef LastComponent = *path::rbegin(Path);
 290     EXPECT_EQ(".", LastComponent);
 291   }
 292
 293   SmallVector<StringRef, 3> RootPaths;
 294   RootPaths.push_back("/");
 295   RootPaths.push_back("//net/");
 296 #ifdef LLVM_ON_WIN32
 297   RootPaths.push_back("c:\\");
 298 #endif
 299
 300   for (StringRef Path : RootPaths) {
 301     StringRef LastComponent = *path::rbegin(Path);
 302     EXPECT_EQ(1u, LastComponent.size());
 303     EXPECT_TRUE(path::is_separator(LastComponent[0]));
 304   }
 305 }
 306
 307 TEST(Support, HomeDirectory) {
 308   std::string expected;
 309 #ifdef LLVM_ON_WIN32
 310   if (wchar_t const *path = ::_wgetenv(L"USERPROFILE")) {
 311     auto pathLen = ::wcslen(path);
 312     ArrayRef<char> ref{reinterpret_cast<char const *>(path),
 313                        pathLen * sizeof(wchar_t)};
 314     convertUTF16ToUTF8String(ref, expected);
 315   }
 316 #else
 317   if (char const *path = ::getenv("HOME"))
 318     expected = path;
 319 #endif
 320   // Do not try to test it if we don't know what to expect.
 321   // On Windows we use something better than env vars.
 322   if (!expected.empty()) {
 323     SmallString<128> HomeDir;
 324     auto status = path::home_directory(HomeDir);
 325     EXPECT_TRUE(status);
 326     EXPECT_EQ(expected, HomeDir);
 327   }
 328 }
 329
 330 TEST(Support, UserCacheDirectory) {
 331   SmallString<13> CacheDir;
 332   SmallString<20> CacheDir2;
 333   auto Status = path::user_cache_directory(CacheDir, "");
 334   EXPECT_TRUE(Status ^ CacheDir.empty());
 335
 336   if (Status) {
 337     EXPECT_TRUE(path::user_cache_directory(CacheDir2, "")); // should succeed
 338     EXPECT_EQ(CacheDir, CacheDir2); // and return same paths
 339
 340     EXPECT_TRUE(path::user_cache_directory(CacheDir, "A", "B", "file.c"));
 341     auto It = path::rbegin(CacheDir);
 342     EXPECT_EQ("file.c", *It);
 343     EXPECT_EQ("B", *++It);
 344     EXPECT_EQ("A", *++It);
 345     auto ParentDir = *++It;
 346
 347     // Test Unicode: "<user_cache_dir>/(pi)r^2/aleth.0"
 348     EXPECT_TRUE(path::user_cache_directory(CacheDir2, "\xCF\x80r\xC2\xB2",
 349                                            "\xE2\x84\xB5.0"));
 350     auto It2 = path::rbegin(CacheDir2);
 351     EXPECT_EQ("\xE2\x84\xB5.0", *It2);
 352     EXPECT_EQ("\xCF\x80r\xC2\xB2", *++It2);
 353     auto ParentDir2 = *++It2;
 354
 355     EXPECT_EQ(ParentDir, ParentDir2);
 356   }
 357 }
 358
 359 TEST(Support, TempDirectory) {
 360   SmallString<32> TempDir;
 361   path::system_temp_directory(false, TempDir);
 362   EXPECT_TRUE(!TempDir.empty());
 363   TempDir.clear();
 364   path::system_temp_directory(true, TempDir);
 365   EXPECT_TRUE(!TempDir.empty());
 366 }
 367
 368 #ifdef LLVM_ON_WIN32
 369 static std::string path2regex(std::string Path) {
 370   size_t Pos = 0;
 371   while ((Pos = Path.find('\\', Pos)) != std::string::npos) {
 372     Path.replace(Pos, 1, "\\\\");
 373     Pos += 2;
 374   }
 375   return Path;
 376 }
 377
 378 /// Helper for running temp dir test in separated process. See below.
 379 #define EXPECT_TEMP_DIR(prepare, expected)                                     \
 380   EXPECT_EXIT(                                                                 \
 381       {                                                                        \
 382         prepare;                                                               \
 383         SmallString<300> TempDir;                                              \
 384         path::system_temp_directory(true, TempDir);                            \
 385         raw_os_ostream(std::cerr) << TempDir;                                  \
 386         std::exit(0);                                                          \
 387       },                                                                       \
 388       ::testing::ExitedWithCode(0), path2regex(expected))
 389
 390 TEST(SupportDeathTest, TempDirectoryOnWindows) {
 391   // In this test we want to check how system_temp_directory responds to
 392   // different values of specific env vars. To prevent corrupting env vars of
 393   // the current process all checks are done in separated processes.
 394   EXPECT_TEMP_DIR(_wputenv_s(L"TMP", L"C:\\OtherFolder"), "C:\\OtherFolder");
 395   EXPECT_TEMP_DIR(_wputenv_s(L"TMP", L"C:/Unix/Path/Seperators"),
 396                   "C:\\Unix\\Path\\Seperators");
 397   EXPECT_TEMP_DIR(_wputenv_s(L"TMP", L"Local Path"), ".+\\Local Path$");
 398   EXPECT_TEMP_DIR(_wputenv_s(L"TMP", L"F:\\TrailingSep\\"), "F:\\TrailingSep");
 399   EXPECT_TEMP_DIR(
 400       _wputenv_s(L"TMP", L"C:\\2\x03C0r-\x00B5\x00B3\\\x2135\x2080"),
 401       "C:\\2\xCF\x80r-\xC2\xB5\xC2\xB3\\\xE2\x84\xB5\xE2\x82\x80");
 402
 403   // Test $TMP empty, $TEMP set.
 404   EXPECT_TEMP_DIR(
 405       {
 406         _wputenv_s(L"TMP", L"");
 407         _wputenv_s(L"TEMP", L"C:\\Valid\\Path");
 408       },
 409       "C:\\Valid\\Path");
 410
 411   // All related env vars empty
 412   EXPECT_TEMP_DIR(
 413   {
 414     _wputenv_s(L"TMP", L"");
 415     _wputenv_s(L"TEMP", L"");
 416     _wputenv_s(L"USERPROFILE", L"");
 417   },
 418     "C:\\Temp");
 419
 420   // Test evn var / path with 260 chars.
 421   SmallString<270> Expected{"C:\\Temp\\AB\\123456789"};
 422   while (Expected.size() < 260)
 423     Expected.append("\\DirNameWith19Charss");
 424   ASSERT_EQ(260U, Expected.size());
 425   EXPECT_TEMP_DIR(_putenv_s("TMP", Expected.c_str()), Expected.c_str());
 426 }
 427 #endif
 428
 429 class FileSystemTest : public testing::Test {
 430 protected:
 431   /// Unique temporary directory in which all created filesystem entities must
 432   /// be placed. It is removed at the end of each test (must be empty).
 433   SmallString<128> TestDirectory;
 434
 435   void SetUp() override {
 436     ASSERT_NO_ERROR(
 437         fs::createUniqueDirectory("file-system-test", TestDirectory));
 438     // We don't care about this specific file.
 439     errs() << "Test Directory: " << TestDirectory << '\n';
 440     errs().flush();
 441   }
 442
 443   void TearDown() override { ASSERT_NO_ERROR(fs::remove(TestDirectory.str())); }
 444 };
 445
 446 TEST_F(FileSystemTest, Unique) {
 447   // Create a temp file.
 448   int FileDescriptor;
 449   SmallString<64> TempPath;
 450   ASSERT_NO_ERROR(
 451       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
 452
 453   // The same file should return an identical unique id.
 454   fs::UniqueID F1, F2;
 455   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), F1));
 456   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), F2));
 457   ASSERT_EQ(F1, F2);
 458
 459   // Different files should return different unique ids.
 460   int FileDescriptor2;
 461   SmallString<64> TempPath2;
 462   ASSERT_NO_ERROR(
 463       fs::createTemporaryFile("prefix", "temp", FileDescriptor2, TempPath2));
 464
 465   fs::UniqueID D;
 466   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath2), D));
 467   ASSERT_NE(D, F1);
 468   ::close(FileDescriptor2);
 469
 470   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
 471
 472   // Two paths representing the same file on disk should still provide the
 473   // same unique id.  We can test this by making a hard link.
 474   ASSERT_NO_ERROR(fs::create_link(Twine(TempPath), Twine(TempPath2)));
 475   fs::UniqueID D2;
 476   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath2), D2));
 477   ASSERT_EQ(D2, F1);
 478
 479   ::close(FileDescriptor);
 480
 481   SmallString<128> Dir1;
 482   ASSERT_NO_ERROR(
 483      fs::createUniqueDirectory("dir1", Dir1));
 484   ASSERT_NO_ERROR(fs::getUniqueID(Dir1.c_str(), F1));
 485   ASSERT_NO_ERROR(fs::getUniqueID(Dir1.c_str(), F2));
 486   ASSERT_EQ(F1, F2);
 487
 488   SmallString<128> Dir2;
 489   ASSERT_NO_ERROR(
 490      fs::createUniqueDirectory("dir2", Dir2));
 491   ASSERT_NO_ERROR(fs::getUniqueID(Dir2.c_str(), F2));
 492   ASSERT_NE(F1, F2);
 493   ASSERT_NO_ERROR(fs::remove(Dir1));
 494   ASSERT_NO_ERROR(fs::remove(Dir2));
 495   ASSERT_NO_ERROR(fs::remove(TempPath2));
 496   ASSERT_NO_ERROR(fs::remove(TempPath));
 497 }
 498
 499 TEST_F(FileSystemTest, TempFiles) {
 500   // Create a temp file.
 501   int FileDescriptor;
 502   SmallString<64> TempPath;
 503   ASSERT_NO_ERROR(
 504       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
 505
 506   // Make sure it exists.
 507   ASSERT_TRUE(sys::fs::exists(Twine(TempPath)));
 508
 509   // Create another temp tile.
 510   int FD2;
 511   SmallString<64> TempPath2;
 512   ASSERT_NO_ERROR(fs::createTemporaryFile("prefix", "temp", FD2, TempPath2));
 513   ASSERT_TRUE(TempPath2.endswith(".temp"));
 514   ASSERT_NE(TempPath.str(), TempPath2.str());
 515
 516   fs::file_status A, B;
 517   ASSERT_NO_ERROR(fs::status(Twine(TempPath), A));
 518   ASSERT_NO_ERROR(fs::status(Twine(TempPath2), B));
 519   EXPECT_FALSE(fs::equivalent(A, B));
 520
 521   ::close(FD2);
 522
 523   // Remove Temp2.
 524   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
 525   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
 526   ASSERT_EQ(fs::remove(Twine(TempPath2), false),
 527             errc::no_such_file_or_directory);
 528
 529   std::error_code EC = fs::status(TempPath2.c_str(), B);
 530   EXPECT_EQ(EC, errc::no_such_file_or_directory);
 531   EXPECT_EQ(B.type(), fs::file_type::file_not_found);
 532
 533   // Make sure Temp2 doesn't exist.
 534   ASSERT_EQ(fs::access(Twine(TempPath2), sys::fs::AccessMode::Exist),
 535             errc::no_such_file_or_directory);
 536
 537   SmallString<64> TempPath3;
 538   ASSERT_NO_ERROR(fs::createTemporaryFile("prefix", "", TempPath3));
 539   ASSERT_FALSE(TempPath3.endswith("."));
 540   FileRemover Cleanup3(TempPath3);
 541
 542   // Create a hard link to Temp1.
 543   ASSERT_NO_ERROR(fs::create_link(Twine(TempPath), Twine(TempPath2)));
 544   bool equal;
 545   ASSERT_NO_ERROR(fs::equivalent(Twine(TempPath), Twine(TempPath2), equal));
 546   EXPECT_TRUE(equal);
 547   ASSERT_NO_ERROR(fs::status(Twine(TempPath), A));
 548   ASSERT_NO_ERROR(fs::status(Twine(TempPath2), B));
 549   EXPECT_TRUE(fs::equivalent(A, B));
 550
 551   // Remove Temp1.
 552   ::close(FileDescriptor);
 553   ASSERT_NO_ERROR(fs::remove(Twine(TempPath)));
 554
 555   // Remove the hard link.
 556   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
 557
 558   // Make sure Temp1 doesn't exist.
 559   ASSERT_EQ(fs::access(Twine(TempPath), sys::fs::AccessMode::Exist),
 560             errc::no_such_file_or_directory);
 561
 562 #ifdef LLVM_ON_WIN32
 563   // Path name > 260 chars should get an error.
 564   const char *Path270 =
 565     "abcdefghijklmnopqrstuvwxyz9abcdefghijklmnopqrstuvwxyz8"
 566     "abcdefghijklmnopqrstuvwxyz7abcdefghijklmnopqrstuvwxyz6"
 567     "abcdefghijklmnopqrstuvwxyz5abcdefghijklmnopqrstuvwxyz4"
 568     "abcdefghijklmnopqrstuvwxyz3abcdefghijklmnopqrstuvwxyz2"
 569     "abcdefghijklmnopqrstuvwxyz1abcdefghijklmnopqrstuvwxyz0";
 570   EXPECT_EQ(fs::createUniqueFile(Path270, FileDescriptor, TempPath),
 571             errc::invalid_argument);
 572   // Relative path < 247 chars, no problem.
 573   const char *Path216 =
 574     "abcdefghijklmnopqrstuvwxyz7abcdefghijklmnopqrstuvwxyz6"
 575     "abcdefghijklmnopqrstuvwxyz5abcdefghijklmnopqrstuvwxyz4"
 576     "abcdefghijklmnopqrstuvwxyz3abcdefghijklmnopqrstuvwxyz2"
 577     "abcdefghijklmnopqrstuvwxyz1abcdefghijklmnopqrstuvwxyz0";
 578   ASSERT_NO_ERROR(fs::createTemporaryFile(Path216, "", TempPath));
 579   ASSERT_NO_ERROR(fs::remove(Twine(TempPath)));
 580 #endif
 581 }
 582
 583 TEST_F(FileSystemTest, CreateDir) {
 584   ASSERT_NO_ERROR(fs::create_directory(Twine(TestDirectory) + "foo"));
 585   ASSERT_NO_ERROR(fs::create_directory(Twine(TestDirectory) + "foo"));
 586   ASSERT_EQ(fs::create_directory(Twine(TestDirectory) + "foo", false),
 587             errc::file_exists);
 588   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "foo"));
 589
 590 #ifdef LLVM_ON_UNIX
 591   // Set a 0000 umask so that we can test our directory permissions.
 592   mode_t OldUmask = ::umask(0000);
 593
 594   fs::file_status Status;
 595   ASSERT_NO_ERROR(
 596       fs::create_directory(Twine(TestDirectory) + "baz500", false,
 597                            fs::perms::owner_read | fs::perms::owner_exe));
 598   ASSERT_NO_ERROR(fs::status(Twine(TestDirectory) + "baz500", Status));
 599   ASSERT_EQ(Status.permissions() & fs::perms::all_all,
 600             fs::perms::owner_read | fs::perms::owner_exe);
 601   ASSERT_NO_ERROR(fs::create_directory(Twine(TestDirectory) + "baz777", false,
 602                                        fs::perms::all_all));
 603   ASSERT_NO_ERROR(fs::status(Twine(TestDirectory) + "baz777", Status));
 604   ASSERT_EQ(Status.permissions() & fs::perms::all_all, fs::perms::all_all);
 605
 606   // Restore umask to be safe.
 607   ::umask(OldUmask);
 608 #endif
 609
 610 #ifdef LLVM_ON_WIN32
 611   // Prove that create_directories() can handle a pathname > 248 characters,
 612   // which is the documented limit for CreateDirectory().
 613   // (248 is MAX_PATH subtracting room for an 8.3 filename.)
 614   // Generate a directory path guaranteed to fall into that range.
 615   size_t TmpLen = TestDirectory.size();
 616   const char *OneDir = "\\123456789";
 617   size_t OneDirLen = strlen(OneDir);
 618   ASSERT_LT(OneDirLen, 12U);
 619   size_t NLevels = ((248 - TmpLen) / OneDirLen) + 1;
 620   SmallString<260> LongDir(TestDirectory);
 621   for (size_t I = 0; I < NLevels; ++I)
 622     LongDir.append(OneDir);
 623   ASSERT_NO_ERROR(fs::create_directories(Twine(LongDir)));
 624   ASSERT_NO_ERROR(fs::create_directories(Twine(LongDir)));
 625   ASSERT_EQ(fs::create_directories(Twine(LongDir), false),
 626             errc::file_exists);
 627   // Tidy up, "recursively" removing the directories.
 628   StringRef ThisDir(LongDir);
 629   for (size_t J = 0; J < NLevels; ++J) {
 630     ASSERT_NO_ERROR(fs::remove(ThisDir));
 631     ThisDir = path::parent_path(ThisDir);
 632   }
 633
 634   // Similarly for a relative pathname.  Need to set the current directory to
 635   // TestDirectory so that the one we create ends up in the right place.
 636   char PreviousDir[260];
 637   size_t PreviousDirLen = ::GetCurrentDirectoryA(260, PreviousDir);
 638   ASSERT_GT(PreviousDirLen, 0U);
 639   ASSERT_LT(PreviousDirLen, 260U);
 640   ASSERT_NE(::SetCurrentDirectoryA(TestDirectory.c_str()), 0);
 641   LongDir.clear();
 642   // Generate a relative directory name with absolute length > 248.
 643   size_t LongDirLen = 249 - TestDirectory.size();
 644   LongDir.assign(LongDirLen, 'a');
 645   ASSERT_NO_ERROR(fs::create_directory(Twine(LongDir)));
 646   // While we're here, prove that .. and . handling works in these long paths.
 647   const char *DotDotDirs = "\\..\\.\\b";
 648   LongDir.append(DotDotDirs);
 649   ASSERT_NO_ERROR(fs::create_directory("b"));
 650   ASSERT_EQ(fs::create_directory(Twine(LongDir), false), errc::file_exists);
 651   // And clean up.
 652   ASSERT_NO_ERROR(fs::remove("b"));
 653   ASSERT_NO_ERROR(fs::remove(
 654     Twine(LongDir.substr(0, LongDir.size() - strlen(DotDotDirs)))));
 655   ASSERT_NE(::SetCurrentDirectoryA(PreviousDir), 0);
 656 #endif
 657 }
 658
 659 TEST_F(FileSystemTest, DirectoryIteration) {
 660   std::error_code ec;
 661   for (fs::directory_iterator i(".", ec), e; i != e; i.increment(ec))
 662     ASSERT_NO_ERROR(ec);
 663
 664   // Create a known hierarchy to recurse over.
 665   ASSERT_NO_ERROR(
 666       fs::create_directories(Twine(TestDirectory) + "/recursive/a0/aa1"));
 667   ASSERT_NO_ERROR(
 668       fs::create_directories(Twine(TestDirectory) + "/recursive/a0/ab1"));
 669   ASSERT_NO_ERROR(fs::create_directories(Twine(TestDirectory) +
 670                                          "/recursive/dontlookhere/da1"));
 671   ASSERT_NO_ERROR(
 672       fs::create_directories(Twine(TestDirectory) + "/recursive/z0/za1"));
 673   ASSERT_NO_ERROR(
 674       fs::create_directories(Twine(TestDirectory) + "/recursive/pop/p1"));
 675   typedef std::vector<std::string> v_t;
 676   v_t visited;
 677   for (fs::recursive_directory_iterator i(Twine(TestDirectory)
 678          + "/recursive", ec), e; i != e; i.increment(ec)){
 679     ASSERT_NO_ERROR(ec);
 680     if (path::filename(i->path()) == "p1") {
 681       i.pop();
 682       // FIXME: recursive_directory_iterator should be more robust.
 683       if (i == e) break;
 684     }
 685     if (path::filename(i->path()) == "dontlookhere")
 686       i.no_push();
 687     visited.push_back(path::filename(i->path()));
 688   }
 689   v_t::const_iterator a0 = find(visited, "a0");
 690   v_t::const_iterator aa1 = find(visited, "aa1");
 691   v_t::const_iterator ab1 = find(visited, "ab1");
 692   v_t::const_iterator dontlookhere = find(visited, "dontlookhere");
 693   v_t::const_iterator da1 = find(visited, "da1");
 694   v_t::const_iterator z0 = find(visited, "z0");
 695   v_t::const_iterator za1 = find(visited, "za1");
 696   v_t::const_iterator pop = find(visited, "pop");
 697   v_t::const_iterator p1 = find(visited, "p1");
 698
 699   // Make sure that each path was visited correctly.
 700   ASSERT_NE(a0, visited.end());
 701   ASSERT_NE(aa1, visited.end());
 702   ASSERT_NE(ab1, visited.end());
 703   ASSERT_NE(dontlookhere, visited.end());
 704   ASSERT_EQ(da1, visited.end()); // Not visited.
 705   ASSERT_NE(z0, visited.end());
 706   ASSERT_NE(za1, visited.end());
 707   ASSERT_NE(pop, visited.end());
 708   ASSERT_EQ(p1, visited.end()); // Not visited.
 709
 710   // Make sure that parents were visited before children. No other ordering
 711   // guarantees can be made across siblings.
 712   ASSERT_LT(a0, aa1);
 713   ASSERT_LT(a0, ab1);
 714   ASSERT_LT(z0, za1);
 715
 716   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/a0/aa1"));
 717   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/a0/ab1"));
 718   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/a0"));
 719   ASSERT_NO_ERROR(
 720       fs::remove(Twine(TestDirectory) + "/recursive/dontlookhere/da1"));
 721   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/dontlookhere"));
 722   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/pop/p1"));
 723   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/pop"));
 724   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/z0/za1"));
 725   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/z0"));
 726   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive"));
 727
 728   // Test recursive_directory_iterator level()
 729   ASSERT_NO_ERROR(
 730       fs::create_directories(Twine(TestDirectory) + "/reclevel/a/b/c"));
 731   fs::recursive_directory_iterator I(Twine(TestDirectory) + "/reclevel", ec), E;
 732   for (int l = 0; I != E; I.increment(ec), ++l) {
 733     ASSERT_NO_ERROR(ec);
 734     EXPECT_EQ(I.level(), l);
 735   }
 736   EXPECT_EQ(I, E);
 737   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/reclevel/a/b/c"));
 738   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/reclevel/a/b"));
 739   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/reclevel/a"));
 740   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/reclevel"));
 741 }
 742
 743 const char archive[] = "!<arch>\x0A";
 744 const char bitcode[] = "\xde\xc0\x17\x0b";
 745 const char coff_object[] = "\x00\x00......";
 746 const char coff_bigobj[] = "\x00\x00\xff\xff\x00\x02......"
 747     "\xc7\xa1\xba\xd1\xee\xba\xa9\x4b\xaf\x20\xfa\xf6\x6a\xa4\xdc\xb8";
 748 const char coff_import_library[] = "\x00\x00\xff\xff....";
 749 const char elf_relocatable[] = { 0x7f, 'E', 'L', 'F', 1, 2, 1, 0, 0,
 750                                  0,    0,   0,   0,   0, 0, 0, 0, 1 };
 751 const char macho_universal_binary[] = "\xca\xfe\xba\xbe...\x00";
 752 const char macho_object[] =
 753     "\xfe\xed\xfa\xce........\x00\x00\x00\x01............";
 754 const char macho_executable[] =
 755     "\xfe\xed\xfa\xce........\x00\x00\x00\x02............";
 756 const char macho_fixed_virtual_memory_shared_lib[] =
 757     "\xfe\xed\xfa\xce........\x00\x00\x00\x03............";
 758 const char macho_core[] =
 759     "\xfe\xed\xfa\xce........\x00\x00\x00\x04............";
 760 const char macho_preload_executable[] =
 761     "\xfe\xed\xfa\xce........\x00\x00\x00\x05............";
 762 const char macho_dynamically_linked_shared_lib[] =
 763     "\xfe\xed\xfa\xce........\x00\x00\x00\x06............";
 764 const char macho_dynamic_linker[] =
 765     "\xfe\xed\xfa\xce........\x00\x00\x00\x07............";
 766 const char macho_bundle[] =
 767     "\xfe\xed\xfa\xce........\x00\x00\x00\x08............";
 768 const char macho_dsym_companion[] =
 769     "\xfe\xed\xfa\xce........\x00\x00\x00\x0a............";
 770 const char macho_kext_bundle[] =
 771     "\xfe\xed\xfa\xce........\x00\x00\x00\x0b............";
 772 const char windows_resource[] = "\x00\x00\x00\x00\x020\x00\x00\x00\xff";
 773 const char macho_dynamically_linked_shared_lib_stub[] =
 774     "\xfe\xed\xfa\xce........\x00\x00\x00\x09............";
 775
 776 TEST_F(FileSystemTest, Magic) {
 777   struct type {
 778     const char *filename;
 779     const char *magic_str;
 780     size_t magic_str_len;
 781     fs::file_magic magic;
 782   } types[] = {
 783 #define DEFINE(magic)                                           \
 784     { #magic, magic, sizeof(magic), fs::file_magic::magic }
 785     DEFINE(archive),
 786     DEFINE(bitcode),
 787     DEFINE(coff_object),
 788     { "coff_bigobj", coff_bigobj, sizeof(coff_bigobj), fs::file_magic::coff_object },
 789     DEFINE(coff_import_library),
 790     DEFINE(elf_relocatable),
 791     DEFINE(macho_universal_binary),
 792     DEFINE(macho_object),
 793     DEFINE(macho_executable),
 794     DEFINE(macho_fixed_virtual_memory_shared_lib),
 795     DEFINE(macho_core),
 796     DEFINE(macho_preload_executable),
 797     DEFINE(macho_dynamically_linked_shared_lib),
 798     DEFINE(macho_dynamic_linker),
 799     DEFINE(macho_bundle),
 800     DEFINE(macho_dynamically_linked_shared_lib_stub),
 801     DEFINE(macho_dsym_companion),
 802     DEFINE(macho_kext_bundle),
 803     DEFINE(windows_resource)
 804 #undef DEFINE
 805     };
 806
 807   // Create some files filled with magic.
 808   for (type *i = types, *e = types + (sizeof(types) / sizeof(type)); i != e;
 809                                                                      ++i) {
 810     SmallString<128> file_pathname(TestDirectory);
 811     path::append(file_pathname, i->filename);
 812     std::error_code EC;
 813     raw_fd_ostream file(file_pathname, EC, sys::fs::F_None);
 814     ASSERT_FALSE(file.has_error());
 815     StringRef magic(i->magic_str, i->magic_str_len);
 816     file << magic;
 817     file.close();
 818     EXPECT_EQ(i->magic, fs::identify_magic(magic));
 819     ASSERT_NO_ERROR(fs::remove(Twine(file_pathname)));
 820   }
 821 }
 822
 823 #ifdef LLVM_ON_WIN32
 824 TEST_F(FileSystemTest, CarriageReturn) {
 825   SmallString<128> FilePathname(TestDirectory);
 826   std::error_code EC;
 827   path::append(FilePathname, "test");
 828
 829   {
 830     raw_fd_ostream File(FilePathname, EC, sys::fs::F_Text);
 831     ASSERT_NO_ERROR(EC);
 832     File << '\n';
 833   }
 834   {
 835     auto Buf = MemoryBuffer::getFile(FilePathname.str());
 836     EXPECT_TRUE((bool)Buf);
 837     EXPECT_EQ(Buf.get()->getBuffer(), "\r\n");
 838   }
 839
 840   {
 841     raw_fd_ostream File(FilePathname, EC, sys::fs::F_None);
 842     ASSERT_NO_ERROR(EC);
 843     File << '\n';
 844   }
 845   {
 846     auto Buf = MemoryBuffer::getFile(FilePathname.str());
 847     EXPECT_TRUE((bool)Buf);
 848     EXPECT_EQ(Buf.get()->getBuffer(), "\n");
 849   }
 850   ASSERT_NO_ERROR(fs::remove(Twine(FilePathname)));
 851 }
 852 #endif
 853
 854 TEST_F(FileSystemTest, Resize) {
 855   int FD;
 856   SmallString<64> TempPath;
 857   ASSERT_NO_ERROR(fs::createTemporaryFile("prefix", "temp", FD, TempPath));
 858   ASSERT_NO_ERROR(fs::resize_file(FD, 123));
 859   fs::file_status Status;
 860   ASSERT_NO_ERROR(fs::status(FD, Status));
 861   ASSERT_EQ(Status.getSize(), 123U);
 862   ::close(FD);
 863   ASSERT_NO_ERROR(fs::remove(TempPath));
 864 }
 865
 866 TEST_F(FileSystemTest, FileMapping) {
 867   // Create a temp file.
 868   int FileDescriptor;
 869   SmallString<64> TempPath;
 870   ASSERT_NO_ERROR(
 871       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
 872   unsigned Size = 4096;
 873   ASSERT_NO_ERROR(fs::resize_file(FileDescriptor, Size));
 874
 875   // Map in temp file and add some content
 876   std::error_code EC;
 877   StringRef Val("hello there");
 878   {
 879     fs::mapped_file_region mfr(FileDescriptor,
 880                                fs::mapped_file_region::readwrite, Size, 0, EC);
 881     ASSERT_NO_ERROR(EC);
 882     std::copy(Val.begin(), Val.end(), mfr.data());
 883     // Explicitly add a 0.
 884     mfr.data()[Val.size()] = 0;
 885     // Unmap temp file
 886   }
 887   ASSERT_EQ(close(FileDescriptor), 0);
 888
 889   // Map it back in read-only
 890   {
 891     int FD;
 892     EC = fs::openFileForRead(Twine(TempPath), FD);
 893     ASSERT_NO_ERROR(EC);
 894     fs::mapped_file_region mfr(FD, fs::mapped_file_region::readonly, Size, 0, EC);
 895     ASSERT_NO_ERROR(EC);
 896
 897     // Verify content
 898     EXPECT_EQ(StringRef(mfr.const_data()), Val);
 899
 900     // Unmap temp file
 901     fs::mapped_file_region m(FD, fs::mapped_file_region::readonly, Size, 0, EC);
 902     ASSERT_NO_ERROR(EC);
 903     ASSERT_EQ(close(FD), 0);
 904   }
 905   ASSERT_NO_ERROR(fs::remove(TempPath));
 906 }
 907
 908 TEST(Support, NormalizePath) {
 909 #if defined(LLVM_ON_WIN32)
 910 #define EXPECT_PATH_IS(path__, windows__, not_windows__)                        \
 911   EXPECT_EQ(path__, windows__);
 912 #else
 913 #define EXPECT_PATH_IS(path__, windows__, not_windows__)                        \
 914   EXPECT_EQ(path__, not_windows__);
 915 #endif
 916
 917   SmallString<64> Path1("a");
 918   SmallString<64> Path2("a/b");
 919   SmallString<64> Path3("a\\b");
 920   SmallString<64> Path4("a\\\\b");
 921   SmallString<64> Path5("\\a");
 922   SmallString<64> Path6("a\\");
 923
 924   path::native(Path1);
 925   EXPECT_PATH_IS(Path1, "a", "a");
 926
 927   path::native(Path2);
 928   EXPECT_PATH_IS(Path2, "a\\b", "a/b");
 929
 930   path::native(Path3);
 931   EXPECT_PATH_IS(Path3, "a\\b", "a/b");
 932
 933   path::native(Path4);
 934   EXPECT_PATH_IS(Path4, "a\\\\b", "a\\\\b");
 935
 936   path::native(Path5);
 937   EXPECT_PATH_IS(Path5, "\\a", "/a");
 938
 939   path::native(Path6);
 940   EXPECT_PATH_IS(Path6, "a\\", "a/");
 941
 942 #undef EXPECT_PATH_IS
 943 }
 944
 945 TEST(Support, RemoveLeadingDotSlash) {
 946   StringRef Path1("././/foolz/wat");
 947   StringRef Path2("./////");
 948
 949   Path1 = path::remove_leading_dotslash(Path1);
 950   EXPECT_EQ(Path1, "foolz/wat");
 951   Path2 = path::remove_leading_dotslash(Path2);
 952   EXPECT_EQ(Path2, "");
 953 }
 954
 955 static std::string remove_dots(StringRef path,
 956     bool remove_dot_dot) {
 957   SmallString<256> buffer(path);
 958   path::remove_dots(buffer, remove_dot_dot);
 959   return buffer.str();
 960 }
 961
 962 TEST(Support, RemoveDots) {
 963 #if defined(LLVM_ON_WIN32)
 964   EXPECT_EQ("foolz\\wat", remove_dots(".\\.\\\\foolz\\wat", false));
 965   EXPECT_EQ("", remove_dots(".\\\\\\\\\\", false));
 966
 967   EXPECT_EQ("a\\..\\b\\c", remove_dots(".\\a\\..\\b\\c", false));
 968   EXPECT_EQ("b\\c", remove_dots(".\\a\\..\\b\\c", true));
 969   EXPECT_EQ("c", remove_dots(".\\.\\c", true));
 970   EXPECT_EQ("..\\a\\c", remove_dots("..\\a\\b\\..\\c", true));
 971   EXPECT_EQ("..\\..\\a\\c", remove_dots("..\\..\\a\\b\\..\\c", true));
 972
 973   SmallString<64> Path1(".\\.\\c");
 974   EXPECT_TRUE(path::remove_dots(Path1, true));
 975   EXPECT_EQ("c", Path1);
 976 #else
 977   EXPECT_EQ("foolz/wat", remove_dots("././/foolz/wat", false));
 978   EXPECT_EQ("", remove_dots("./////", false));
 979
 980   EXPECT_EQ("a/../b/c", remove_dots("./a/../b/c", false));
 981   EXPECT_EQ("b/c", remove_dots("./a/../b/c", true));
 982   EXPECT_EQ("c", remove_dots("././c", true));
 983   EXPECT_EQ("../a/c", remove_dots("../a/b/../c", true));
 984   EXPECT_EQ("../../a/c", remove_dots("../../a/b/../c", true));
 985   EXPECT_EQ("/a/c", remove_dots("/../../a/c", true));
 986   EXPECT_EQ("/a/c", remove_dots("/../a/b//../././/c", true));
 987
 988   SmallString<64> Path1("././c");
 989   EXPECT_TRUE(path::remove_dots(Path1, true));
 990   EXPECT_EQ("c", Path1);
 991 #endif
 992 }
 993
 994 TEST(Support, ReplacePathPrefix) {
 995   SmallString<64> Path1("/foo");
 996   SmallString<64> Path2("/old/foo");
 997   SmallString<64> OldPrefix("/old");
 998   SmallString<64> NewPrefix("/new");
 999   SmallString<64> NewPrefix2("/longernew");
1000   SmallString<64> EmptyPrefix("");
1001
1002   SmallString<64> Path = Path1;
1003   path::replace_path_prefix(Path, OldPrefix, NewPrefix);
1004   EXPECT_EQ(Path, "/foo");
1005   Path = Path2;
1006   path::replace_path_prefix(Path, OldPrefix, NewPrefix);
1007   EXPECT_EQ(Path, "/new/foo");
1008   Path = Path2;
1009   path::replace_path_prefix(Path, OldPrefix, NewPrefix2);
1010   EXPECT_EQ(Path, "/longernew/foo");
1011   Path = Path1;
1012   path::replace_path_prefix(Path, EmptyPrefix, NewPrefix);
1013   EXPECT_EQ(Path, "/new/foo");
1014   Path = Path2;
1015   path::replace_path_prefix(Path, OldPrefix, EmptyPrefix);
1016   EXPECT_EQ(Path, "/foo");
1017 }
1018
1019 TEST_F(FileSystemTest, PathFromFD) {
1020   // Create a temp file.
1021   int FileDescriptor;
1022   SmallString<64> TempPath;
1023   ASSERT_NO_ERROR(
1024       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
1025   FileRemover Cleanup(TempPath);
1026
1027   // Make sure it exists.
1028   ASSERT_TRUE(sys::fs::exists(Twine(TempPath)));
1029
1030   // Try to get the path from the file descriptor
1031   SmallString<64> ResultPath;
1032   std::error_code ErrorCode =
1033       fs::getPathFromOpenFD(FileDescriptor, ResultPath);
1034
1035   // If we succeeded, check that the paths are the same (modulo case):
1036   if (!ErrorCode) {
1037     // The paths returned by createTemporaryFile and getPathFromOpenFD
1038     // should reference the same file on disk.
1039     fs::UniqueID D1, D2;
1040     ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), D1));
1041     ASSERT_NO_ERROR(fs::getUniqueID(Twine(ResultPath), D2));
1042     ASSERT_EQ(D1, D2);
1043   }
1044
1045   ::close(FileDescriptor);
1046 }
1047
1048 TEST_F(FileSystemTest, PathFromFDWin32) {
1049   // Create a temp file.
1050   int FileDescriptor;
1051   SmallString<64> TempPath;
1052   ASSERT_NO_ERROR(
1053     fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
1054   FileRemover Cleanup(TempPath);
1055
1056   // Make sure it exists.
1057   ASSERT_TRUE(sys::fs::exists(Twine(TempPath)));
1058
1059   SmallVector<char, 8> ResultPath;
1060   std::error_code ErrorCode =
1061     fs::getPathFromOpenFD(FileDescriptor, ResultPath);
1062
1063   if (!ErrorCode) {
1064     // Now that we know how much space is required for the path, create a path
1065     // buffer with exactly enough space (sans null terminator, which should not
1066     // be present), and call getPathFromOpenFD again to ensure that the API
1067     // properly handles exactly-sized buffers.
1068     SmallVector<char, 8> ExactSizedPath(ResultPath.size());
1069     ErrorCode = fs::getPathFromOpenFD(FileDescriptor, ExactSizedPath);
1070     ResultPath = ExactSizedPath;
1071   }
1072
1073   if (!ErrorCode) {
1074     fs::UniqueID D1, D2;
1075     ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), D1));
1076     ASSERT_NO_ERROR(fs::getUniqueID(Twine(ResultPath), D2));
1077     ASSERT_EQ(D1, D2);
1078   }
1079   ::close(FileDescriptor);
1080 }
1081
1082 TEST_F(FileSystemTest, PathFromFDUnicode) {
1083   // Create a temp file.
1084   int FileDescriptor;
1085   SmallString<64> TempPath;
1086
1087   // Test Unicode: "<temp directory>/(pi)r^2<temp rand chars>.aleth.0"
1088   ASSERT_NO_ERROR(
1089     fs::createTemporaryFile("\xCF\x80r\xC2\xB2",
1090                             "\xE2\x84\xB5.0", FileDescriptor, TempPath));
1091   FileRemover Cleanup(TempPath);
1092
1093   // Make sure it exists.
1094   ASSERT_TRUE(sys::fs::exists(Twine(TempPath)));
1095
1096   SmallVector<char, 8> ResultPath;
1097   std::error_code ErrorCode =
1098     fs::getPathFromOpenFD(FileDescriptor, ResultPath);
1099
1100   if (!ErrorCode) {
1101     fs::UniqueID D1, D2;
1102     ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), D1));
1103     ASSERT_NO_ERROR(fs::getUniqueID(Twine(ResultPath), D2));
1104     ASSERT_EQ(D1, D2);
1105   }
1106   ::close(FileDescriptor);
1107 }
1108
1109 TEST_F(FileSystemTest, OpenFileForRead) {
1110   // Create a temp file.
1111   int FileDescriptor;
1112   SmallString<64> TempPath;
1113   ASSERT_NO_ERROR(
1114       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
1115   FileRemover Cleanup(TempPath);
1116
1117   // Make sure it exists.
1118   ASSERT_TRUE(sys::fs::exists(Twine(TempPath)));
1119
1120   // Open the file for read
1121   int FileDescriptor2;
1122   SmallString<64> ResultPath;
1123   ASSERT_NO_ERROR(
1124       fs::openFileForRead(Twine(TempPath), FileDescriptor2, &ResultPath))
1125
1126   // If we succeeded, check that the paths are the same (modulo case):
1127   if (!ResultPath.empty()) {
1128     // The paths returned by createTemporaryFile and getPathFromOpenFD
1129     // should reference the same file on disk.
1130     fs::UniqueID D1, D2;
1131     ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), D1));
1132     ASSERT_NO_ERROR(fs::getUniqueID(Twine(ResultPath), D2));
1133     ASSERT_EQ(D1, D2);
1134   }
1135
1136   ::close(FileDescriptor);
1137 }
1138 } // anonymous namespace