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