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/Support/ConvertUTF.h"
  12 #include "llvm/Support/Errc.h"
  13 #include "llvm/Support/ErrorHandling.h"
  14 #include "llvm/Support/FileSystem.h"
  15 #include "llvm/Support/MemoryBuffer.h"
  16 #include "llvm/Support/raw_ostream.h"
  17 #include "gtest/gtest.h"
  18
  19 #ifdef LLVM_ON_WIN32
  20 #include <windows.h>
  21 #include <winerror.h>
  22 #endif
  23
  24 #ifdef LLVM_ON_UNIX
  25 #include <sys/stat.h>
  26 #endif
  27
  28 using namespace llvm;
  29 using namespace llvm::sys;
  30
  31 #define ASSERT_NO_ERROR(x)                                                     \
  32   if (std::error_code ASSERT_NO_ERROR_ec = x) {                                \
  33     SmallString<128> MessageStorage;                                           \
  34     raw_svector_ostream Message(MessageStorage);                               \
  35     Message << #x ": did not return errc::success.\n"                          \
  36             << "error number: " << ASSERT_NO_ERROR_ec.value() << "\n"          \
  37             << "error message: " << ASSERT_NO_ERROR_ec.message() << "\n";      \
  38     GTEST_FATAL_FAILURE_(MessageStorage.c_str());                              \
  39   } else {                                                                     \
  40   }
  41
  42 namespace {
  43
  44 TEST(is_separator, Works) {
  45   EXPECT_TRUE(path::is_separator('/'));
  46   EXPECT_FALSE(path::is_separator('\0'));
  47   EXPECT_FALSE(path::is_separator('-'));
  48   EXPECT_FALSE(path::is_separator(' '));
  49
  50 #ifdef LLVM_ON_WIN32
  51   EXPECT_TRUE(path::is_separator('\\'));
  52 #else
  53   EXPECT_FALSE(path::is_separator('\\'));
  54 #endif
  55 }
  56
  57 TEST(Support, Path) {
  58   SmallVector<StringRef, 40> paths;
  59   paths.push_back("");
  60   paths.push_back(".");
  61   paths.push_back("..");
  62   paths.push_back("foo");
  63   paths.push_back("/");
  64   paths.push_back("/foo");
  65   paths.push_back("foo/");
  66   paths.push_back("/foo/");
  67   paths.push_back("foo/bar");
  68   paths.push_back("/foo/bar");
  69   paths.push_back("//net");
  70   paths.push_back("//net/foo");
  71   paths.push_back("///foo///");
  72   paths.push_back("///foo///bar");
  73   paths.push_back("/.");
  74   paths.push_back("./");
  75   paths.push_back("/..");
  76   paths.push_back("../");
  77   paths.push_back("foo/.");
  78   paths.push_back("foo/..");
  79   paths.push_back("foo/./");
  80   paths.push_back("foo/./bar");
  81   paths.push_back("foo/..");
  82   paths.push_back("foo/../");
  83   paths.push_back("foo/../bar");
  84   paths.push_back("c:");
  85   paths.push_back("c:/");
  86   paths.push_back("c:foo");
  87   paths.push_back("c:/foo");
  88   paths.push_back("c:foo/");
  89   paths.push_back("c:/foo/");
  90   paths.push_back("c:/foo/bar");
  91   paths.push_back("prn:");
  92   paths.push_back("c:\\");
  93   paths.push_back("c:foo");
  94   paths.push_back("c:\\foo");
  95   paths.push_back("c:foo\\");
  96   paths.push_back("c:\\foo\\");
  97   paths.push_back("c:\\foo/");
  98   paths.push_back("c:/foo\\bar");
  99
 100   SmallVector<StringRef, 5> ComponentStack;
 101   for (SmallVector<StringRef, 40>::const_iterator i = paths.begin(),
 102                                                   e = paths.end();
 103                                                   i != e;
 104                                                   ++i) {
 105     for (sys::path::const_iterator ci = sys::path::begin(*i),
 106                                    ce = sys::path::end(*i);
 107                                    ci != ce;
 108                                    ++ci) {
 109       ASSERT_FALSE(ci->empty());
 110       ComponentStack.push_back(*ci);
 111     }
 112
 113     for (sys::path::reverse_iterator ci = sys::path::rbegin(*i),
 114                                      ce = sys::path::rend(*i);
 115                                      ci != ce;
 116                                      ++ci) {
 117       ASSERT_TRUE(*ci == ComponentStack.back());
 118       ComponentStack.pop_back();
 119     }
 120     ASSERT_TRUE(ComponentStack.empty());
 121
 122     path::has_root_path(*i);
 123     path::root_path(*i);
 124     path::has_root_name(*i);
 125     path::root_name(*i);
 126     path::has_root_directory(*i);
 127     path::root_directory(*i);
 128     path::has_parent_path(*i);
 129     path::parent_path(*i);
 130     path::has_filename(*i);
 131     path::filename(*i);
 132     path::has_stem(*i);
 133     path::stem(*i);
 134     path::has_extension(*i);
 135     path::extension(*i);
 136     path::is_absolute(*i);
 137     path::is_relative(*i);
 138
 139     SmallString<128> temp_store;
 140     temp_store = *i;
 141     ASSERT_NO_ERROR(fs::make_absolute(temp_store));
 142     temp_store = *i;
 143     path::remove_filename(temp_store);
 144
 145     temp_store = *i;
 146     path::replace_extension(temp_store, "ext");
 147     StringRef filename(temp_store.begin(), temp_store.size()), stem, ext;
 148     stem = path::stem(filename);
 149     ext  = path::extension(filename);
 150     EXPECT_EQ(*sys::path::rbegin(filename), (stem + ext).str());
 151
 152     path::native(*i, temp_store);
 153   }
 154
 155   SmallString<32> Relative("foo.cpp");
 156   ASSERT_NO_ERROR(sys::fs::make_absolute("/root", Relative));
 157   Relative[5] = '/'; // Fix up windows paths.
 158   ASSERT_EQ("/root/foo.cpp", Relative);
 159 }
 160
 161 TEST(Support, RelativePathIterator) {
 162   SmallString<64> Path(StringRef("c/d/e/foo.txt"));
 163   typedef SmallVector<StringRef, 4> PathComponents;
 164   PathComponents ExpectedPathComponents;
 165   PathComponents ActualPathComponents;
 166
 167   StringRef(Path).split(ExpectedPathComponents, '/');
 168
 169   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
 170        ++I) {
 171     ActualPathComponents.push_back(*I);
 172   }
 173
 174   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
 175
 176   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
 177     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
 178   }
 179 }
 180
 181 TEST(Support, RelativePathDotIterator) {
 182   SmallString<64> Path(StringRef(".c/.d/../."));
 183   typedef SmallVector<StringRef, 4> PathComponents;
 184   PathComponents ExpectedPathComponents;
 185   PathComponents ActualPathComponents;
 186
 187   StringRef(Path).split(ExpectedPathComponents, '/');
 188
 189   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
 190        ++I) {
 191     ActualPathComponents.push_back(*I);
 192   }
 193
 194   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
 195
 196   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
 197     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
 198   }
 199 }
 200
 201 TEST(Support, AbsolutePathIterator) {
 202   SmallString<64> Path(StringRef("/c/d/e/foo.txt"));
 203   typedef SmallVector<StringRef, 4> PathComponents;
 204   PathComponents ExpectedPathComponents;
 205   PathComponents ActualPathComponents;
 206
 207   StringRef(Path).split(ExpectedPathComponents, '/');
 208
 209   // The root path will also be a component when iterating
 210   ExpectedPathComponents[0] = "/";
 211
 212   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
 213        ++I) {
 214     ActualPathComponents.push_back(*I);
 215   }
 216
 217   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
 218
 219   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
 220     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
 221   }
 222 }
 223
 224 TEST(Support, AbsolutePathDotIterator) {
 225   SmallString<64> Path(StringRef("/.c/.d/../."));
 226   typedef SmallVector<StringRef, 4> PathComponents;
 227   PathComponents ExpectedPathComponents;
 228   PathComponents ActualPathComponents;
 229
 230   StringRef(Path).split(ExpectedPathComponents, '/');
 231
 232   // The root path will also be a component when iterating
 233   ExpectedPathComponents[0] = "/";
 234
 235   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
 236        ++I) {
 237     ActualPathComponents.push_back(*I);
 238   }
 239
 240   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
 241
 242   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
 243     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
 244   }
 245 }
 246
 247 #ifdef LLVM_ON_WIN32
 248 TEST(Support, AbsolutePathIteratorWin32) {
 249   SmallString<64> Path(StringRef("c:\\c\\e\\foo.txt"));
 250   typedef SmallVector<StringRef, 4> PathComponents;
 251   PathComponents ExpectedPathComponents;
 252   PathComponents ActualPathComponents;
 253
 254   StringRef(Path).split(ExpectedPathComponents, "\\");
 255
 256   // The root path (which comes after the drive name) will also be a component
 257   // when iterating.
 258   ExpectedPathComponents.insert(ExpectedPathComponents.begin()+1, "\\");
 259
 260   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
 261        ++I) {
 262     ActualPathComponents.push_back(*I);
 263   }
 264
 265   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
 266
 267   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
 268     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
 269   }
 270 }
 271 #endif // LLVM_ON_WIN32
 272
 273 TEST(Support, AbsolutePathIteratorEnd) {
 274   // Trailing slashes are converted to '.' unless they are part of the root path.
 275   SmallVector<StringRef, 4> Paths;
 276   Paths.push_back("/foo/");
 277   Paths.push_back("/foo//");
 278   Paths.push_back("//net//");
 279 #ifdef LLVM_ON_WIN32
 280   Paths.push_back("c:\\\\");
 281 #endif
 282
 283   for (StringRef Path : Paths) {
 284     StringRef LastComponent = *path::rbegin(Path);
 285     EXPECT_EQ(".", LastComponent);
 286   }
 287
 288   SmallVector<StringRef, 3> RootPaths;
 289   RootPaths.push_back("/");
 290   RootPaths.push_back("//net/");
 291 #ifdef LLVM_ON_WIN32
 292   RootPaths.push_back("c:\\");
 293 #endif
 294
 295   for (StringRef Path : RootPaths) {
 296     StringRef LastComponent = *path::rbegin(Path);
 297     EXPECT_EQ(1u, LastComponent.size());
 298     EXPECT_TRUE(path::is_separator(LastComponent[0]));
 299   }
 300 }
 301
 302 TEST(Support, HomeDirectory) {
 303   std::string expected;
 304 #ifdef LLVM_ON_WIN32
 305   wchar_t *path = ::_wgetenv(L"USERPROFILE");
 306   auto pathLen = ::wcslen(path);
 307   ArrayRef<char> ref{reinterpret_cast<char *>(path), pathLen * sizeof(wchar_t)};
 308   convertUTF16ToUTF8String(ref, expected);
 309 #else
 310   if (char const *home = ::getenv("HOME"))
 311     expected = home;
 312 #endif
 313   if (expected.length() > 0) {
 314     SmallString<128> HomeDir;
 315     auto status = path::home_directory(HomeDir);
 316     EXPECT_TRUE(status ^ HomeDir.empty());
 317     EXPECT_EQ(expected, HomeDir);
 318   }
 319 }
 320
 321 class FileSystemTest : public testing::Test {
 322 protected:
 323   /// Unique temporary directory in which all created filesystem entities must
 324   /// be placed. It is removed at the end of each test (must be empty).
 325   SmallString<128> TestDirectory;
 326
 327   void SetUp() override {
 328     ASSERT_NO_ERROR(
 329         fs::createUniqueDirectory("file-system-test", TestDirectory));
 330     // We don't care about this specific file.
 331     errs() << "Test Directory: " << TestDirectory << '\n';
 332     errs().flush();
 333   }
 334
 335   void TearDown() override { ASSERT_NO_ERROR(fs::remove(TestDirectory.str())); }
 336 };
 337
 338 TEST_F(FileSystemTest, Unique) {
 339   // Create a temp file.
 340   int FileDescriptor;
 341   SmallString<64> TempPath;
 342   ASSERT_NO_ERROR(
 343       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
 344
 345   // The same file should return an identical unique id.
 346   fs::UniqueID F1, F2;
 347   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), F1));
 348   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), F2));
 349   ASSERT_EQ(F1, F2);
 350
 351   // Different files should return different unique ids.
 352   int FileDescriptor2;
 353   SmallString<64> TempPath2;
 354   ASSERT_NO_ERROR(
 355       fs::createTemporaryFile("prefix", "temp", FileDescriptor2, TempPath2));
 356
 357   fs::UniqueID D;
 358   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath2), D));
 359   ASSERT_NE(D, F1);
 360   ::close(FileDescriptor2);
 361
 362   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
 363
 364   // Two paths representing the same file on disk should still provide the
 365   // same unique id.  We can test this by making a hard link.
 366   ASSERT_NO_ERROR(fs::create_link(Twine(TempPath), Twine(TempPath2)));
 367   fs::UniqueID D2;
 368   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath2), D2));
 369   ASSERT_EQ(D2, F1);
 370
 371   ::close(FileDescriptor);
 372
 373   SmallString<128> Dir1;
 374   ASSERT_NO_ERROR(
 375      fs::createUniqueDirectory("dir1", Dir1));
 376   ASSERT_NO_ERROR(fs::getUniqueID(Dir1.c_str(), F1));
 377   ASSERT_NO_ERROR(fs::getUniqueID(Dir1.c_str(), F2));
 378   ASSERT_EQ(F1, F2);
 379
 380   SmallString<128> Dir2;
 381   ASSERT_NO_ERROR(
 382      fs::createUniqueDirectory("dir2", Dir2));
 383   ASSERT_NO_ERROR(fs::getUniqueID(Dir2.c_str(), F2));
 384   ASSERT_NE(F1, F2);
 385 }
 386
 387 TEST_F(FileSystemTest, TempFiles) {
 388   // Create a temp file.
 389   int FileDescriptor;
 390   SmallString<64> TempPath;
 391   ASSERT_NO_ERROR(
 392       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
 393
 394   // Make sure it exists.
 395   ASSERT_TRUE(sys::fs::exists(Twine(TempPath)));
 396
 397   // Create another temp tile.
 398   int FD2;
 399   SmallString<64> TempPath2;
 400   ASSERT_NO_ERROR(fs::createTemporaryFile("prefix", "temp", FD2, TempPath2));
 401   ASSERT_TRUE(TempPath2.endswith(".temp"));
 402   ASSERT_NE(TempPath.str(), TempPath2.str());
 403
 404   fs::file_status A, B;
 405   ASSERT_NO_ERROR(fs::status(Twine(TempPath), A));
 406   ASSERT_NO_ERROR(fs::status(Twine(TempPath2), B));
 407   EXPECT_FALSE(fs::equivalent(A, B));
 408
 409   ::close(FD2);
 410
 411   // Remove Temp2.
 412   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
 413   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
 414   ASSERT_EQ(fs::remove(Twine(TempPath2), false),
 415             errc::no_such_file_or_directory);
 416
 417   std::error_code EC = fs::status(TempPath2.c_str(), B);
 418   EXPECT_EQ(EC, errc::no_such_file_or_directory);
 419   EXPECT_EQ(B.type(), fs::file_type::file_not_found);
 420
 421   // Make sure Temp2 doesn't exist.
 422   ASSERT_EQ(fs::access(Twine(TempPath2), sys::fs::AccessMode::Exist),
 423             errc::no_such_file_or_directory);
 424
 425   SmallString<64> TempPath3;
 426   ASSERT_NO_ERROR(fs::createTemporaryFile("prefix", "", TempPath3));
 427   ASSERT_FALSE(TempPath3.endswith("."));
 428
 429   // Create a hard link to Temp1.
 430   ASSERT_NO_ERROR(fs::create_link(Twine(TempPath), Twine(TempPath2)));
 431   bool equal;
 432   ASSERT_NO_ERROR(fs::equivalent(Twine(TempPath), Twine(TempPath2), equal));
 433   EXPECT_TRUE(equal);
 434   ASSERT_NO_ERROR(fs::status(Twine(TempPath), A));
 435   ASSERT_NO_ERROR(fs::status(Twine(TempPath2), B));
 436   EXPECT_TRUE(fs::equivalent(A, B));
 437
 438   // Remove Temp1.
 439   ::close(FileDescriptor);
 440   ASSERT_NO_ERROR(fs::remove(Twine(TempPath)));
 441
 442   // Remove the hard link.
 443   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
 444
 445   // Make sure Temp1 doesn't exist.
 446   ASSERT_EQ(fs::access(Twine(TempPath), sys::fs::AccessMode::Exist),
 447             errc::no_such_file_or_directory);
 448
 449 #ifdef LLVM_ON_WIN32
 450   // Path name > 260 chars should get an error.
 451   const char *Path270 =
 452     "abcdefghijklmnopqrstuvwxyz9abcdefghijklmnopqrstuvwxyz8"
 453     "abcdefghijklmnopqrstuvwxyz7abcdefghijklmnopqrstuvwxyz6"
 454     "abcdefghijklmnopqrstuvwxyz5abcdefghijklmnopqrstuvwxyz4"
 455     "abcdefghijklmnopqrstuvwxyz3abcdefghijklmnopqrstuvwxyz2"
 456     "abcdefghijklmnopqrstuvwxyz1abcdefghijklmnopqrstuvwxyz0";
 457   EXPECT_EQ(fs::createUniqueFile(Path270, FileDescriptor, TempPath),
 458             errc::invalid_argument);
 459   // Relative path < 247 chars, no problem.
 460   const char *Path216 =
 461     "abcdefghijklmnopqrstuvwxyz7abcdefghijklmnopqrstuvwxyz6"
 462     "abcdefghijklmnopqrstuvwxyz5abcdefghijklmnopqrstuvwxyz4"
 463     "abcdefghijklmnopqrstuvwxyz3abcdefghijklmnopqrstuvwxyz2"
 464     "abcdefghijklmnopqrstuvwxyz1abcdefghijklmnopqrstuvwxyz0";
 465   ASSERT_NO_ERROR(fs::createTemporaryFile(Path216, "", TempPath));
 466   ASSERT_NO_ERROR(fs::remove(Twine(TempPath)));
 467 #endif
 468 }
 469
 470 TEST_F(FileSystemTest, CreateDir) {
 471   ASSERT_NO_ERROR(fs::create_directory(Twine(TestDirectory) + "foo"));
 472   ASSERT_NO_ERROR(fs::create_directory(Twine(TestDirectory) + "foo"));
 473   ASSERT_EQ(fs::create_directory(Twine(TestDirectory) + "foo", false),
 474             errc::file_exists);
 475   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "foo"));
 476
 477 #ifdef LLVM_ON_UNIX
 478   // Set a 0000 umask so that we can test our directory permissions.
 479   mode_t OldUmask = ::umask(0000);
 480
 481   fs::file_status Status;
 482   ASSERT_NO_ERROR(
 483       fs::create_directory(Twine(TestDirectory) + "baz500", false,
 484                            fs::perms::owner_read | fs::perms::owner_exe));
 485   ASSERT_NO_ERROR(fs::status(Twine(TestDirectory) + "baz500", Status));
 486   ASSERT_EQ(Status.permissions() & fs::perms::all_all,
 487             fs::perms::owner_read | fs::perms::owner_exe);
 488   ASSERT_NO_ERROR(fs::create_directory(Twine(TestDirectory) + "baz777", false,
 489                                        fs::perms::all_all));
 490   ASSERT_NO_ERROR(fs::status(Twine(TestDirectory) + "baz777", Status));
 491   ASSERT_EQ(Status.permissions() & fs::perms::all_all, fs::perms::all_all);
 492
 493   // Restore umask to be safe.
 494   ::umask(OldUmask);
 495 #endif
 496
 497 #ifdef LLVM_ON_WIN32
 498   // Prove that create_directories() can handle a pathname > 248 characters,
 499   // which is the documented limit for CreateDirectory().
 500   // (248 is MAX_PATH subtracting room for an 8.3 filename.)
 501   // Generate a directory path guaranteed to fall into that range.
 502   size_t TmpLen = TestDirectory.size();
 503   const char *OneDir = "\\123456789";
 504   size_t OneDirLen = strlen(OneDir);
 505   ASSERT_LT(OneDirLen, 12U);
 506   size_t NLevels = ((248 - TmpLen) / OneDirLen) + 1;
 507   SmallString<260> LongDir(TestDirectory);
 508   for (size_t I = 0; I < NLevels; ++I)
 509     LongDir.append(OneDir);
 510   ASSERT_NO_ERROR(fs::create_directories(Twine(LongDir)));
 511   ASSERT_NO_ERROR(fs::create_directories(Twine(LongDir)));
 512   ASSERT_EQ(fs::create_directories(Twine(LongDir), false),
 513             errc::file_exists);
 514   // Tidy up, "recursively" removing the directories.
 515   StringRef ThisDir(LongDir);
 516   for (size_t J = 0; J < NLevels; ++J) {
 517     ASSERT_NO_ERROR(fs::remove(ThisDir));
 518     ThisDir = path::parent_path(ThisDir);
 519   }
 520
 521   // Similarly for a relative pathname.  Need to set the current directory to
 522   // TestDirectory so that the one we create ends up in the right place.
 523   char PreviousDir[260];
 524   size_t PreviousDirLen = ::GetCurrentDirectoryA(260, PreviousDir);
 525   ASSERT_GT(PreviousDirLen, 0U);
 526   ASSERT_LT(PreviousDirLen, 260U);
 527   ASSERT_NE(::SetCurrentDirectoryA(TestDirectory.c_str()), 0);
 528   LongDir.clear();
 529   // Generate a relative directory name with absolute length > 248.
 530   size_t LongDirLen = 249 - TestDirectory.size();
 531   LongDir.assign(LongDirLen, 'a');
 532   ASSERT_NO_ERROR(fs::create_directory(Twine(LongDir)));
 533   // While we're here, prove that .. and . handling works in these long paths.
 534   const char *DotDotDirs = "\\..\\.\\b";
 535   LongDir.append(DotDotDirs);
 536   ASSERT_NO_ERROR(fs::create_directory("b"));
 537   ASSERT_EQ(fs::create_directory(Twine(LongDir), false), errc::file_exists);
 538   // And clean up.
 539   ASSERT_NO_ERROR(fs::remove("b"));
 540   ASSERT_NO_ERROR(fs::remove(
 541     Twine(LongDir.substr(0, LongDir.size() - strlen(DotDotDirs)))));
 542   ASSERT_NE(::SetCurrentDirectoryA(PreviousDir), 0);
 543 #endif
 544 }
 545
 546 TEST_F(FileSystemTest, DirectoryIteration) {
 547   std::error_code ec;
 548   for (fs::directory_iterator i(".", ec), e; i != e; i.increment(ec))
 549     ASSERT_NO_ERROR(ec);
 550
 551   // Create a known hierarchy to recurse over.
 552   ASSERT_NO_ERROR(
 553       fs::create_directories(Twine(TestDirectory) + "/recursive/a0/aa1"));
 554   ASSERT_NO_ERROR(
 555       fs::create_directories(Twine(TestDirectory) + "/recursive/a0/ab1"));
 556   ASSERT_NO_ERROR(fs::create_directories(Twine(TestDirectory) +
 557                                          "/recursive/dontlookhere/da1"));
 558   ASSERT_NO_ERROR(
 559       fs::create_directories(Twine(TestDirectory) + "/recursive/z0/za1"));
 560   ASSERT_NO_ERROR(
 561       fs::create_directories(Twine(TestDirectory) + "/recursive/pop/p1"));
 562   typedef std::vector<std::string> v_t;
 563   v_t visited;
 564   for (fs::recursive_directory_iterator i(Twine(TestDirectory)
 565          + "/recursive", ec), e; i != e; i.increment(ec)){
 566     ASSERT_NO_ERROR(ec);
 567     if (path::filename(i->path()) == "p1") {
 568       i.pop();
 569       // FIXME: recursive_directory_iterator should be more robust.
 570       if (i == e) break;
 571     }
 572     if (path::filename(i->path()) == "dontlookhere")
 573       i.no_push();
 574     visited.push_back(path::filename(i->path()));
 575   }
 576   v_t::const_iterator a0 = std::find(visited.begin(), visited.end(), "a0");
 577   v_t::const_iterator aa1 = std::find(visited.begin(), visited.end(), "aa1");
 578   v_t::const_iterator ab1 = std::find(visited.begin(), visited.end(), "ab1");
 579   v_t::const_iterator dontlookhere = std::find(visited.begin(), visited.end(),
 580                                                "dontlookhere");
 581   v_t::const_iterator da1 = std::find(visited.begin(), visited.end(), "da1");
 582   v_t::const_iterator z0 = std::find(visited.begin(), visited.end(), "z0");
 583   v_t::const_iterator za1 = std::find(visited.begin(), visited.end(), "za1");
 584   v_t::const_iterator pop = std::find(visited.begin(), visited.end(), "pop");
 585   v_t::const_iterator p1 = std::find(visited.begin(), visited.end(), "p1");
 586
 587   // Make sure that each path was visited correctly.
 588   ASSERT_NE(a0, visited.end());
 589   ASSERT_NE(aa1, visited.end());
 590   ASSERT_NE(ab1, visited.end());
 591   ASSERT_NE(dontlookhere, visited.end());
 592   ASSERT_EQ(da1, visited.end()); // Not visited.
 593   ASSERT_NE(z0, visited.end());
 594   ASSERT_NE(za1, visited.end());
 595   ASSERT_NE(pop, visited.end());
 596   ASSERT_EQ(p1, visited.end()); // Not visited.
 597
 598   // Make sure that parents were visited before children. No other ordering
 599   // guarantees can be made across siblings.
 600   ASSERT_LT(a0, aa1);
 601   ASSERT_LT(a0, ab1);
 602   ASSERT_LT(z0, za1);
 603
 604   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/a0/aa1"));
 605   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/a0/ab1"));
 606   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/a0"));
 607   ASSERT_NO_ERROR(
 608       fs::remove(Twine(TestDirectory) + "/recursive/dontlookhere/da1"));
 609   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/dontlookhere"));
 610   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/pop/p1"));
 611   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/pop"));
 612   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/z0/za1"));
 613   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/z0"));
 614   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive"));
 615 }
 616
 617 const char archive[] = "!<arch>\x0A";
 618 const char bitcode[] = "\xde\xc0\x17\x0b";
 619 const char coff_object[] = "\x00\x00......";
 620 const char coff_bigobj[] = "\x00\x00\xff\xff\x00\x02......"
 621     "\xc7\xa1\xba\xd1\xee\xba\xa9\x4b\xaf\x20\xfa\xf6\x6a\xa4\xdc\xb8";
 622 const char coff_import_library[] = "\x00\x00\xff\xff....";
 623 const char elf_relocatable[] = { 0x7f, 'E', 'L', 'F', 1, 2, 1, 0, 0,
 624                                  0,    0,   0,   0,   0, 0, 0, 0, 1 };
 625 const char macho_universal_binary[] = "\xca\xfe\xba\xbe...\0x00";
 626 const char macho_object[] = "\xfe\xed\xfa\xce..........\x00\x01";
 627 const char macho_executable[] = "\xfe\xed\xfa\xce..........\x00\x02";
 628 const char macho_fixed_virtual_memory_shared_lib[] =
 629     "\xfe\xed\xfa\xce..........\x00\x03";
 630 const char macho_core[] = "\xfe\xed\xfa\xce..........\x00\x04";
 631 const char macho_preload_executable[] = "\xfe\xed\xfa\xce..........\x00\x05";
 632 const char macho_dynamically_linked_shared_lib[] =
 633     "\xfe\xed\xfa\xce..........\x00\x06";
 634 const char macho_dynamic_linker[] = "\xfe\xed\xfa\xce..........\x00\x07";
 635 const char macho_bundle[] = "\xfe\xed\xfa\xce..........\x00\x08";
 636 const char macho_dsym_companion[] = "\xfe\xed\xfa\xce..........\x00\x0a";
 637 const char macho_kext_bundle[] = "\xfe\xed\xfa\xce..........\x00\x0b";
 638 const char windows_resource[] = "\x00\x00\x00\x00\x020\x00\x00\x00\xff";
 639 const char macho_dynamically_linked_shared_lib_stub[] =
 640     "\xfe\xed\xfa\xce..........\x00\x09";
 641
 642 TEST_F(FileSystemTest, Magic) {
 643   struct type {
 644     const char *filename;
 645     const char *magic_str;
 646     size_t magic_str_len;
 647     fs::file_magic magic;
 648   } types[] = {
 649 #define DEFINE(magic)                                           \
 650     { #magic, magic, sizeof(magic), fs::file_magic::magic }
 651     DEFINE(archive),
 652     DEFINE(bitcode),
 653     DEFINE(coff_object),
 654     { "coff_bigobj", coff_bigobj, sizeof(coff_bigobj), fs::file_magic::coff_object },
 655     DEFINE(coff_import_library),
 656     DEFINE(elf_relocatable),
 657     DEFINE(macho_universal_binary),
 658     DEFINE(macho_object),
 659     DEFINE(macho_executable),
 660     DEFINE(macho_fixed_virtual_memory_shared_lib),
 661     DEFINE(macho_core),
 662     DEFINE(macho_preload_executable),
 663     DEFINE(macho_dynamically_linked_shared_lib),
 664     DEFINE(macho_dynamic_linker),
 665     DEFINE(macho_bundle),
 666     DEFINE(macho_dynamically_linked_shared_lib_stub),
 667     DEFINE(macho_dsym_companion),
 668     DEFINE(macho_kext_bundle),
 669     DEFINE(windows_resource)
 670 #undef DEFINE
 671     };
 672
 673   // Create some files filled with magic.
 674   for (type *i = types, *e = types + (sizeof(types) / sizeof(type)); i != e;
 675                                                                      ++i) {
 676     SmallString<128> file_pathname(TestDirectory);
 677     path::append(file_pathname, i->filename);
 678     std::error_code EC;
 679     raw_fd_ostream file(file_pathname, EC, sys::fs::F_None);
 680     ASSERT_FALSE(file.has_error());
 681     StringRef magic(i->magic_str, i->magic_str_len);
 682     file << magic;
 683     file.close();
 684     EXPECT_EQ(i->magic, fs::identify_magic(magic));
 685     ASSERT_NO_ERROR(fs::remove(Twine(file_pathname)));
 686   }
 687 }
 688
 689 #ifdef LLVM_ON_WIN32
 690 TEST_F(FileSystemTest, CarriageReturn) {
 691   SmallString<128> FilePathname(TestDirectory);
 692   std::error_code EC;
 693   path::append(FilePathname, "test");
 694
 695   {
 696     raw_fd_ostream File(FilePathname, EC, sys::fs::F_Text);
 697     ASSERT_NO_ERROR(EC);
 698     File << '\n';
 699   }
 700   {
 701     auto Buf = MemoryBuffer::getFile(FilePathname.str());
 702     EXPECT_TRUE((bool)Buf);
 703     EXPECT_EQ(Buf.get()->getBuffer(), "\r\n");
 704   }
 705
 706   {
 707     raw_fd_ostream File(FilePathname, EC, sys::fs::F_None);
 708     ASSERT_NO_ERROR(EC);
 709     File << '\n';
 710   }
 711   {
 712     auto Buf = MemoryBuffer::getFile(FilePathname.str());
 713     EXPECT_TRUE((bool)Buf);
 714     EXPECT_EQ(Buf.get()->getBuffer(), "\n");
 715   }
 716   ASSERT_NO_ERROR(fs::remove(Twine(FilePathname)));
 717 }
 718 #endif
 719
 720 TEST_F(FileSystemTest, Resize) {
 721   int FD;
 722   SmallString<64> TempPath;
 723   ASSERT_NO_ERROR(fs::createTemporaryFile("prefix", "temp", FD, TempPath));
 724   ASSERT_NO_ERROR(fs::resize_file(FD, 123));
 725   fs::file_status Status;
 726   ASSERT_NO_ERROR(fs::status(FD, Status));
 727   ASSERT_EQ(Status.getSize(), 123U);
 728 }
 729
 730 TEST_F(FileSystemTest, FileMapping) {
 731   // Create a temp file.
 732   int FileDescriptor;
 733   SmallString<64> TempPath;
 734   ASSERT_NO_ERROR(
 735       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
 736   unsigned Size = 4096;
 737   ASSERT_NO_ERROR(fs::resize_file(FileDescriptor, Size));
 738
 739   // Map in temp file and add some content
 740   std::error_code EC;
 741   StringRef Val("hello there");
 742   {
 743     fs::mapped_file_region mfr(FileDescriptor,
 744                                fs::mapped_file_region::readwrite, Size, 0, EC);
 745     ASSERT_NO_ERROR(EC);
 746     std::copy(Val.begin(), Val.end(), mfr.data());
 747     // Explicitly add a 0.
 748     mfr.data()[Val.size()] = 0;
 749     // Unmap temp file
 750   }
 751
 752   // Map it back in read-only
 753   int FD;
 754   EC = fs::openFileForRead(Twine(TempPath), FD);
 755   ASSERT_NO_ERROR(EC);
 756   fs::mapped_file_region mfr(FD, fs::mapped_file_region::readonly, Size, 0, EC);
 757   ASSERT_NO_ERROR(EC);
 758
 759   // Verify content
 760   EXPECT_EQ(StringRef(mfr.const_data()), Val);
 761
 762   // Unmap temp file
 763   fs::mapped_file_region m(FD, fs::mapped_file_region::readonly, Size, 0, EC);
 764   ASSERT_NO_ERROR(EC);
 765   ASSERT_EQ(close(FD), 0);
 766 }
 767
 768 TEST(Support, NormalizePath) {
 769 #if defined(LLVM_ON_WIN32)
 770 #define EXPECT_PATH_IS(path__, windows__, not_windows__)                        \
 771   EXPECT_EQ(path__, windows__);
 772 #else
 773 #define EXPECT_PATH_IS(path__, windows__, not_windows__)                        \
 774   EXPECT_EQ(path__, not_windows__);
 775 #endif
 776
 777   SmallString<64> Path1("a");
 778   SmallString<64> Path2("a/b");
 779   SmallString<64> Path3("a\\b");
 780   SmallString<64> Path4("a\\\\b");
 781   SmallString<64> Path5("\\a");
 782   SmallString<64> Path6("a\\");
 783
 784   path::native(Path1);
 785   EXPECT_PATH_IS(Path1, "a", "a");
 786
 787   path::native(Path2);
 788   EXPECT_PATH_IS(Path2, "a\\b", "a/b");
 789
 790   path::native(Path3);
 791   EXPECT_PATH_IS(Path3, "a\\b", "a/b");
 792
 793   path::native(Path4);
 794   EXPECT_PATH_IS(Path4, "a\\\\b", "a\\\\b");
 795
 796   path::native(Path5);
 797   EXPECT_PATH_IS(Path5, "\\a", "/a");
 798
 799   path::native(Path6);
 800   EXPECT_PATH_IS(Path6, "a\\", "a/");
 801
 802 #undef EXPECT_PATH_IS
 803 }
 804
 805 TEST(Support, RemoveLeadingDotSlash) {
 806   StringRef Path1("././/foolz/wat");
 807   StringRef Path2("./////");
 808
 809   Path1 = path::remove_leading_dotslash(Path1);
 810   EXPECT_EQ(Path1, "foolz/wat");
 811   Path2 = path::remove_leading_dotslash(Path2);
 812   EXPECT_EQ(Path2, "");
 813 }
 814 } // anonymous namespace