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