1 //===- llvm/unittest/Support/Path.cpp - Path tests ------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "llvm/Support/Path.h"
11 #include "llvm/ADT/STLExtras.h"
12 #include "llvm/Support/ConvertUTF.h"
13 #include "llvm/Support/Errc.h"
14 #include "llvm/Support/ErrorHandling.h"
15 #include "llvm/Support/FileSystem.h"
16 #include "llvm/Support/FileUtilities.h"
17 #include "llvm/Support/MemoryBuffer.h"
18 #include "llvm/Support/raw_ostream.h"
19 #include "gtest/gtest.h"
20 
21 #ifdef LLVM_ON_WIN32
22 #include "llvm/ADT/ArrayRef.h"
23 #include <windows.h>
24 #include <winerror.h>
25 #endif
26 
27 #ifdef LLVM_ON_UNIX
28 #include <sys/stat.h>
29 #endif
30 
31 using namespace llvm;
32 using namespace llvm::sys;
33 
34 #define ASSERT_NO_ERROR(x)                                                     \
35   if (std::error_code ASSERT_NO_ERROR_ec = x) {                                \
36     SmallString<128> MessageStorage;                                           \
37     raw_svector_ostream Message(MessageStorage);                               \
38     Message << #x ": did not return errc::success.\n"                          \
39             << "error number: " << ASSERT_NO_ERROR_ec.value() << "\n"          \
40             << "error message: " << ASSERT_NO_ERROR_ec.message() << "\n";      \
41     GTEST_FATAL_FAILURE_(MessageStorage.c_str());                              \
42   } else {                                                                     \
43   }
44 
45 namespace {
46 
47 TEST(is_separator, Works) {
48   EXPECT_TRUE(path::is_separator('/'));
49   EXPECT_FALSE(path::is_separator('\0'));
50   EXPECT_FALSE(path::is_separator('-'));
51   EXPECT_FALSE(path::is_separator(' '));
52 
53 #ifdef LLVM_ON_WIN32
54   EXPECT_TRUE(path::is_separator('\\'));
55 #else
56   EXPECT_FALSE(path::is_separator('\\'));
57 #endif
58 }
59 
60 TEST(Support, Path) {
61   SmallVector<StringRef, 40> paths;
62   paths.push_back("");
63   paths.push_back(".");
64   paths.push_back("..");
65   paths.push_back("foo");
66   paths.push_back("/");
67   paths.push_back("/foo");
68   paths.push_back("foo/");
69   paths.push_back("/foo/");
70   paths.push_back("foo/bar");
71   paths.push_back("/foo/bar");
72   paths.push_back("//net");
73   paths.push_back("//net/foo");
74   paths.push_back("///foo///");
75   paths.push_back("///foo///bar");
76   paths.push_back("/.");
77   paths.push_back("./");
78   paths.push_back("/..");
79   paths.push_back("../");
80   paths.push_back("foo/.");
81   paths.push_back("foo/..");
82   paths.push_back("foo/./");
83   paths.push_back("foo/./bar");
84   paths.push_back("foo/..");
85   paths.push_back("foo/../");
86   paths.push_back("foo/../bar");
87   paths.push_back("c:");
88   paths.push_back("c:/");
89   paths.push_back("c:foo");
90   paths.push_back("c:/foo");
91   paths.push_back("c:foo/");
92   paths.push_back("c:/foo/");
93   paths.push_back("c:/foo/bar");
94   paths.push_back("prn:");
95   paths.push_back("c:\\");
96   paths.push_back("c:foo");
97   paths.push_back("c:\\foo");
98   paths.push_back("c:foo\\");
99   paths.push_back("c:\\foo\\");
100   paths.push_back("c:\\foo/");
101   paths.push_back("c:/foo\\bar");
102 
103   SmallVector<StringRef, 5> ComponentStack;
104   for (SmallVector<StringRef, 40>::const_iterator i = paths.begin(),
105                                                   e = paths.end();
106                                                   i != e;
107                                                   ++i) {
108     for (sys::path::const_iterator ci = sys::path::begin(*i),
109                                    ce = sys::path::end(*i);
110                                    ci != ce;
111                                    ++ci) {
112       ASSERT_FALSE(ci->empty());
113       ComponentStack.push_back(*ci);
114     }
115 
116     for (sys::path::reverse_iterator ci = sys::path::rbegin(*i),
117                                      ce = sys::path::rend(*i);
118                                      ci != ce;
119                                      ++ci) {
120       ASSERT_TRUE(*ci == ComponentStack.back());
121       ComponentStack.pop_back();
122     }
123     ASSERT_TRUE(ComponentStack.empty());
124 
125     path::has_root_path(*i);
126     path::root_path(*i);
127     path::has_root_name(*i);
128     path::root_name(*i);
129     path::has_root_directory(*i);
130     path::root_directory(*i);
131     path::has_parent_path(*i);
132     path::parent_path(*i);
133     path::has_filename(*i);
134     path::filename(*i);
135     path::has_stem(*i);
136     path::stem(*i);
137     path::has_extension(*i);
138     path::extension(*i);
139     path::is_absolute(*i);
140     path::is_relative(*i);
141 
142     SmallString<128> temp_store;
143     temp_store = *i;
144     ASSERT_NO_ERROR(fs::make_absolute(temp_store));
145     temp_store = *i;
146     path::remove_filename(temp_store);
147 
148     temp_store = *i;
149     path::replace_extension(temp_store, "ext");
150     StringRef filename(temp_store.begin(), temp_store.size()), stem, ext;
151     stem = path::stem(filename);
152     ext  = path::extension(filename);
153     EXPECT_EQ(*sys::path::rbegin(filename), (stem + ext).str());
154 
155     path::native(*i, temp_store);
156   }
157 
158   SmallString<32> Relative("foo.cpp");
159   ASSERT_NO_ERROR(sys::fs::make_absolute("/root", Relative));
160   Relative[5] = '/'; // Fix up windows paths.
161   ASSERT_EQ("/root/foo.cpp", Relative);
162 }
163 
164 TEST(Support, RelativePathIterator) {
165   SmallString<64> Path(StringRef("c/d/e/foo.txt"));
166   typedef SmallVector<StringRef, 4> PathComponents;
167   PathComponents ExpectedPathComponents;
168   PathComponents ActualPathComponents;
169 
170   StringRef(Path).split(ExpectedPathComponents, '/');
171 
172   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
173        ++I) {
174     ActualPathComponents.push_back(*I);
175   }
176 
177   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
178 
179   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
180     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
181   }
182 }
183 
184 TEST(Support, RelativePathDotIterator) {
185   SmallString<64> Path(StringRef(".c/.d/../."));
186   typedef SmallVector<StringRef, 4> PathComponents;
187   PathComponents ExpectedPathComponents;
188   PathComponents ActualPathComponents;
189 
190   StringRef(Path).split(ExpectedPathComponents, '/');
191 
192   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
193        ++I) {
194     ActualPathComponents.push_back(*I);
195   }
196 
197   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
198 
199   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
200     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
201   }
202 }
203 
204 TEST(Support, AbsolutePathIterator) {
205   SmallString<64> Path(StringRef("/c/d/e/foo.txt"));
206   typedef SmallVector<StringRef, 4> PathComponents;
207   PathComponents ExpectedPathComponents;
208   PathComponents ActualPathComponents;
209 
210   StringRef(Path).split(ExpectedPathComponents, '/');
211 
212   // The root path will also be a component when iterating
213   ExpectedPathComponents[0] = "/";
214 
215   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
216        ++I) {
217     ActualPathComponents.push_back(*I);
218   }
219 
220   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
221 
222   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
223     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
224   }
225 }
226 
227 TEST(Support, AbsolutePathDotIterator) {
228   SmallString<64> Path(StringRef("/.c/.d/../."));
229   typedef SmallVector<StringRef, 4> PathComponents;
230   PathComponents ExpectedPathComponents;
231   PathComponents ActualPathComponents;
232 
233   StringRef(Path).split(ExpectedPathComponents, '/');
234 
235   // The root path will also be a component when iterating
236   ExpectedPathComponents[0] = "/";
237 
238   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
239        ++I) {
240     ActualPathComponents.push_back(*I);
241   }
242 
243   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
244 
245   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
246     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
247   }
248 }
249 
250 #ifdef LLVM_ON_WIN32
251 TEST(Support, AbsolutePathIteratorWin32) {
252   SmallString<64> Path(StringRef("c:\\c\\e\\foo.txt"));
253   typedef SmallVector<StringRef, 4> PathComponents;
254   PathComponents ExpectedPathComponents;
255   PathComponents ActualPathComponents;
256 
257   StringRef(Path).split(ExpectedPathComponents, "\\");
258 
259   // The root path (which comes after the drive name) will also be a component
260   // when iterating.
261   ExpectedPathComponents.insert(ExpectedPathComponents.begin()+1, "\\");
262 
263   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
264        ++I) {
265     ActualPathComponents.push_back(*I);
266   }
267 
268   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
269 
270   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
271     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
272   }
273 }
274 #endif // LLVM_ON_WIN32
275 
276 TEST(Support, AbsolutePathIteratorEnd) {
277   // Trailing slashes are converted to '.' unless they are part of the root path.
278   SmallVector<StringRef, 4> Paths;
279   Paths.push_back("/foo/");
280   Paths.push_back("/foo//");
281   Paths.push_back("//net//");
282 #ifdef LLVM_ON_WIN32
283   Paths.push_back("c:\\\\");
284 #endif
285 
286   for (StringRef Path : Paths) {
287     StringRef LastComponent = *path::rbegin(Path);
288     EXPECT_EQ(".", LastComponent);
289   }
290 
291   SmallVector<StringRef, 3> RootPaths;
292   RootPaths.push_back("/");
293   RootPaths.push_back("//net/");
294 #ifdef LLVM_ON_WIN32
295   RootPaths.push_back("c:\\");
296 #endif
297 
298   for (StringRef Path : RootPaths) {
299     StringRef LastComponent = *path::rbegin(Path);
300     EXPECT_EQ(1u, LastComponent.size());
301     EXPECT_TRUE(path::is_separator(LastComponent[0]));
302   }
303 }
304 
305 TEST(Support, HomeDirectory) {
306   std::string expected;
307 #ifdef LLVM_ON_WIN32
308   if (wchar_t const *path = ::_wgetenv(L"USERPROFILE")) {
309     auto pathLen = ::wcslen(path);
310     ArrayRef<char> ref{reinterpret_cast<char const *>(path),
311                        pathLen * sizeof(wchar_t)};
312     convertUTF16ToUTF8String(ref, expected);
313   }
314 #else
315   if (char const *path = ::getenv("HOME"))
316     expected = path;
317 #endif
318   // Do not try to test it if we don't know what to expect.
319   // On Windows we use something better than env vars.
320   if (!expected.empty()) {
321     SmallString<128> HomeDir;
322     auto status = path::home_directory(HomeDir);
323     EXPECT_TRUE(status);
324     EXPECT_EQ(expected, HomeDir);
325   }
326 }
327 
328 TEST(Support, UserCacheDirectory) {
329   SmallString<13> CacheDir;
330   SmallString<20> CacheDir2;
331   auto Status = path::user_cache_directory(CacheDir, "");
332   EXPECT_TRUE(Status ^ CacheDir.empty());
333 
334   if (Status) {
335     EXPECT_TRUE(path::user_cache_directory(CacheDir2, "")); // should succeed
336     EXPECT_EQ(CacheDir, CacheDir2); // and return same paths
337 
338     EXPECT_TRUE(path::user_cache_directory(CacheDir, "A", "B", "file.c"));
339     auto It = path::rbegin(CacheDir);
340     EXPECT_EQ("file.c", *It);
341     EXPECT_EQ("B", *++It);
342     EXPECT_EQ("A", *++It);
343     auto ParentDir = *++It;
344 
345     // Test Unicode: "<user_cache_dir>/(pi)r^2/aleth.0"
346     EXPECT_TRUE(path::user_cache_directory(CacheDir2, "\xCF\x80r\xC2\xB2",
347                                            "\xE2\x84\xB5.0"));
348     auto It2 = path::rbegin(CacheDir2);
349     EXPECT_EQ("\xE2\x84\xB5.0", *It2);
350     EXPECT_EQ("\xCF\x80r\xC2\xB2", *++It2);
351     auto ParentDir2 = *++It2;
352 
353     EXPECT_EQ(ParentDir, ParentDir2);
354   }
355 }
356 
357 TEST(Support, TempDirectory) {
358   SmallString<32> TempDir;
359   path::system_temp_directory(false, TempDir);
360   EXPECT_TRUE(!TempDir.empty());
361   TempDir.clear();
362   path::system_temp_directory(true, TempDir);
363   EXPECT_TRUE(!TempDir.empty());
364 }
365 
366 #ifdef LLVM_ON_WIN32
367 static std::string path2regex(std::string Path) {
368   size_t Pos = 0;
369   while ((Pos = Path.find('\\', Pos)) != std::string::npos) {
370     Path.replace(Pos, 1, "\\\\");
371     Pos += 2;
372   }
373   return Path;
374 }
375 
376 /// Helper for running temp dir test in separated process. See below.
377 #define EXPECT_TEMP_DIR(prepare, expected)                                     \
378   EXPECT_EXIT(                                                                 \
379       {                                                                        \
380         prepare;                                                               \
381         SmallString<300> TempDir;                                              \
382         path::system_temp_directory(true, TempDir);                            \
383         raw_os_ostream(std::cerr) << TempDir;                                  \
384         std::exit(0);                                                          \
385       },                                                                       \
386       ::testing::ExitedWithCode(0), path2regex(expected))
387 
388 TEST(SupportDeathTest, TempDirectoryOnWindows) {
389   // In this test we want to check how system_temp_directory responds to
390   // different values of specific env vars. To prevent corrupting env vars of
391   // the current process all checks are done in separated processes.
392   EXPECT_TEMP_DIR(_wputenv_s(L"TMP", L"C:\\OtherFolder"), "C:\\OtherFolder");
393   EXPECT_TEMP_DIR(_wputenv_s(L"TMP", L"C:/Unix/Path/Seperators"),
394                   "C:\\Unix\\Path\\Seperators");
395   EXPECT_TEMP_DIR(_wputenv_s(L"TMP", L"Local Path"), ".+\\Local Path$");
396   EXPECT_TEMP_DIR(_wputenv_s(L"TMP", L"F:\\TrailingSep\\"), "F:\\TrailingSep");
397   EXPECT_TEMP_DIR(
398       _wputenv_s(L"TMP", L"C:\\2\x03C0r-\x00B5\x00B3\\\x2135\x2080"),
399       "C:\\2\xCF\x80r-\xC2\xB5\xC2\xB3\\\xE2\x84\xB5\xE2\x82\x80");
400 
401   // Test $TMP empty, $TEMP set.
402   EXPECT_TEMP_DIR(
403       {
404         _wputenv_s(L"TMP", L"");
405         _wputenv_s(L"TEMP", L"C:\\Valid\\Path");
406       },
407       "C:\\Valid\\Path");
408 
409   // All related env vars empty
410   EXPECT_TEMP_DIR(
411   {
412     _wputenv_s(L"TMP", L"");
413     _wputenv_s(L"TEMP", L"");
414     _wputenv_s(L"USERPROFILE", L"");
415   },
416     "C:\\Temp");
417 
418   // Test evn var / path with 260 chars.
419   SmallString<270> Expected{"C:\\Temp\\AB\\123456789"};
420   while (Expected.size() < 260)
421     Expected.append("\\DirNameWith19Charss");
422   ASSERT_EQ(260U, Expected.size());
423   EXPECT_TEMP_DIR(_putenv_s("TMP", Expected.c_str()), Expected.c_str());
424 }
425 #endif
426 
427 class FileSystemTest : public testing::Test {
428 protected:
429   /// Unique temporary directory in which all created filesystem entities must
430   /// be placed. It is removed at the end of each test (must be empty).
431   SmallString<128> TestDirectory;
432 
433   void SetUp() override {
434     ASSERT_NO_ERROR(
435         fs::createUniqueDirectory("file-system-test", TestDirectory));
436     // We don't care about this specific file.
437     errs() << "Test Directory: " << TestDirectory << '\n';
438     errs().flush();
439   }
440 
441   void TearDown() override { ASSERT_NO_ERROR(fs::remove(TestDirectory.str())); }
442 };
443 
444 TEST_F(FileSystemTest, Unique) {
445   // Create a temp file.
446   int FileDescriptor;
447   SmallString<64> TempPath;
448   ASSERT_NO_ERROR(
449       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
450 
451   // The same file should return an identical unique id.
452   fs::UniqueID F1, F2;
453   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), F1));
454   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), F2));
455   ASSERT_EQ(F1, F2);
456 
457   // Different files should return different unique ids.
458   int FileDescriptor2;
459   SmallString<64> TempPath2;
460   ASSERT_NO_ERROR(
461       fs::createTemporaryFile("prefix", "temp", FileDescriptor2, TempPath2));
462 
463   fs::UniqueID D;
464   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath2), D));
465   ASSERT_NE(D, F1);
466   ::close(FileDescriptor2);
467 
468   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
469 
470   // Two paths representing the same file on disk should still provide the
471   // same unique id.  We can test this by making a hard link.
472   ASSERT_NO_ERROR(fs::create_link(Twine(TempPath), Twine(TempPath2)));
473   fs::UniqueID D2;
474   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath2), D2));
475   ASSERT_EQ(D2, F1);
476 
477   ::close(FileDescriptor);
478 
479   SmallString<128> Dir1;
480   ASSERT_NO_ERROR(
481      fs::createUniqueDirectory("dir1", Dir1));
482   ASSERT_NO_ERROR(fs::getUniqueID(Dir1.c_str(), F1));
483   ASSERT_NO_ERROR(fs::getUniqueID(Dir1.c_str(), F2));
484   ASSERT_EQ(F1, F2);
485 
486   SmallString<128> Dir2;
487   ASSERT_NO_ERROR(
488      fs::createUniqueDirectory("dir2", Dir2));
489   ASSERT_NO_ERROR(fs::getUniqueID(Dir2.c_str(), F2));
490   ASSERT_NE(F1, F2);
491   ASSERT_NO_ERROR(fs::remove(Dir1));
492   ASSERT_NO_ERROR(fs::remove(Dir2));
493   ASSERT_NO_ERROR(fs::remove(TempPath2));
494   ASSERT_NO_ERROR(fs::remove(TempPath));
495 }
496 
497 TEST_F(FileSystemTest, TempFiles) {
498   // Create a temp file.
499   int FileDescriptor;
500   SmallString<64> TempPath;
501   ASSERT_NO_ERROR(
502       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
503 
504   // Make sure it exists.
505   ASSERT_TRUE(sys::fs::exists(Twine(TempPath)));
506 
507   // Create another temp tile.
508   int FD2;
509   SmallString<64> TempPath2;
510   ASSERT_NO_ERROR(fs::createTemporaryFile("prefix", "temp", FD2, TempPath2));
511   ASSERT_TRUE(TempPath2.endswith(".temp"));
512   ASSERT_NE(TempPath.str(), TempPath2.str());
513 
514   fs::file_status A, B;
515   ASSERT_NO_ERROR(fs::status(Twine(TempPath), A));
516   ASSERT_NO_ERROR(fs::status(Twine(TempPath2), B));
517   EXPECT_FALSE(fs::equivalent(A, B));
518 
519   ::close(FD2);
520 
521   // Remove Temp2.
522   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
523   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
524   ASSERT_EQ(fs::remove(Twine(TempPath2), false),
525             errc::no_such_file_or_directory);
526 
527   std::error_code EC = fs::status(TempPath2.c_str(), B);
528   EXPECT_EQ(EC, errc::no_such_file_or_directory);
529   EXPECT_EQ(B.type(), fs::file_type::file_not_found);
530 
531   // Make sure Temp2 doesn't exist.
532   ASSERT_EQ(fs::access(Twine(TempPath2), sys::fs::AccessMode::Exist),
533             errc::no_such_file_or_directory);
534 
535   SmallString<64> TempPath3;
536   ASSERT_NO_ERROR(fs::createTemporaryFile("prefix", "", TempPath3));
537   ASSERT_FALSE(TempPath3.endswith("."));
538   FileRemover Cleanup3(TempPath3);
539 
540   // Create a hard link to Temp1.
541   ASSERT_NO_ERROR(fs::create_link(Twine(TempPath), Twine(TempPath2)));
542   bool equal;
543   ASSERT_NO_ERROR(fs::equivalent(Twine(TempPath), Twine(TempPath2), equal));
544   EXPECT_TRUE(equal);
545   ASSERT_NO_ERROR(fs::status(Twine(TempPath), A));
546   ASSERT_NO_ERROR(fs::status(Twine(TempPath2), B));
547   EXPECT_TRUE(fs::equivalent(A, B));
548 
549   // Remove Temp1.
550   ::close(FileDescriptor);
551   ASSERT_NO_ERROR(fs::remove(Twine(TempPath)));
552 
553   // Remove the hard link.
554   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
555 
556   // Make sure Temp1 doesn't exist.
557   ASSERT_EQ(fs::access(Twine(TempPath), sys::fs::AccessMode::Exist),
558             errc::no_such_file_or_directory);
559 
560 #ifdef LLVM_ON_WIN32
561   // Path name > 260 chars should get an error.
562   const char *Path270 =
563     "abcdefghijklmnopqrstuvwxyz9abcdefghijklmnopqrstuvwxyz8"
564     "abcdefghijklmnopqrstuvwxyz7abcdefghijklmnopqrstuvwxyz6"
565     "abcdefghijklmnopqrstuvwxyz5abcdefghijklmnopqrstuvwxyz4"
566     "abcdefghijklmnopqrstuvwxyz3abcdefghijklmnopqrstuvwxyz2"
567     "abcdefghijklmnopqrstuvwxyz1abcdefghijklmnopqrstuvwxyz0";
568   EXPECT_EQ(fs::createUniqueFile(Path270, FileDescriptor, TempPath),
569             errc::invalid_argument);
570   // Relative path < 247 chars, no problem.
571   const char *Path216 =
572     "abcdefghijklmnopqrstuvwxyz7abcdefghijklmnopqrstuvwxyz6"
573     "abcdefghijklmnopqrstuvwxyz5abcdefghijklmnopqrstuvwxyz4"
574     "abcdefghijklmnopqrstuvwxyz3abcdefghijklmnopqrstuvwxyz2"
575     "abcdefghijklmnopqrstuvwxyz1abcdefghijklmnopqrstuvwxyz0";
576   ASSERT_NO_ERROR(fs::createTemporaryFile(Path216, "", TempPath));
577   ASSERT_NO_ERROR(fs::remove(Twine(TempPath)));
578 #endif
579 }
580 
581 TEST_F(FileSystemTest, CreateDir) {
582   ASSERT_NO_ERROR(fs::create_directory(Twine(TestDirectory) + "foo"));
583   ASSERT_NO_ERROR(fs::create_directory(Twine(TestDirectory) + "foo"));
584   ASSERT_EQ(fs::create_directory(Twine(TestDirectory) + "foo", false),
585             errc::file_exists);
586   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "foo"));
587 
588 #ifdef LLVM_ON_UNIX
589   // Set a 0000 umask so that we can test our directory permissions.
590   mode_t OldUmask = ::umask(0000);
591 
592   fs::file_status Status;
593   ASSERT_NO_ERROR(
594       fs::create_directory(Twine(TestDirectory) + "baz500", false,
595                            fs::perms::owner_read | fs::perms::owner_exe));
596   ASSERT_NO_ERROR(fs::status(Twine(TestDirectory) + "baz500", Status));
597   ASSERT_EQ(Status.permissions() & fs::perms::all_all,
598             fs::perms::owner_read | fs::perms::owner_exe);
599   ASSERT_NO_ERROR(fs::create_directory(Twine(TestDirectory) + "baz777", false,
600                                        fs::perms::all_all));
601   ASSERT_NO_ERROR(fs::status(Twine(TestDirectory) + "baz777", Status));
602   ASSERT_EQ(Status.permissions() & fs::perms::all_all, fs::perms::all_all);
603 
604   // Restore umask to be safe.
605   ::umask(OldUmask);
606 #endif
607 
608 #ifdef LLVM_ON_WIN32
609   // Prove that create_directories() can handle a pathname > 248 characters,
610   // which is the documented limit for CreateDirectory().
611   // (248 is MAX_PATH subtracting room for an 8.3 filename.)
612   // Generate a directory path guaranteed to fall into that range.
613   size_t TmpLen = TestDirectory.size();
614   const char *OneDir = "\\123456789";
615   size_t OneDirLen = strlen(OneDir);
616   ASSERT_LT(OneDirLen, 12U);
617   size_t NLevels = ((248 - TmpLen) / OneDirLen) + 1;
618   SmallString<260> LongDir(TestDirectory);
619   for (size_t I = 0; I < NLevels; ++I)
620     LongDir.append(OneDir);
621   ASSERT_NO_ERROR(fs::create_directories(Twine(LongDir)));
622   ASSERT_NO_ERROR(fs::create_directories(Twine(LongDir)));
623   ASSERT_EQ(fs::create_directories(Twine(LongDir), false),
624             errc::file_exists);
625   // Tidy up, "recursively" removing the directories.
626   StringRef ThisDir(LongDir);
627   for (size_t J = 0; J < NLevels; ++J) {
628     ASSERT_NO_ERROR(fs::remove(ThisDir));
629     ThisDir = path::parent_path(ThisDir);
630   }
631 
632   // Similarly for a relative pathname.  Need to set the current directory to
633   // TestDirectory so that the one we create ends up in the right place.
634   char PreviousDir[260];
635   size_t PreviousDirLen = ::GetCurrentDirectoryA(260, PreviousDir);
636   ASSERT_GT(PreviousDirLen, 0U);
637   ASSERT_LT(PreviousDirLen, 260U);
638   ASSERT_NE(::SetCurrentDirectoryA(TestDirectory.c_str()), 0);
639   LongDir.clear();
640   // Generate a relative directory name with absolute length > 248.
641   size_t LongDirLen = 249 - TestDirectory.size();
642   LongDir.assign(LongDirLen, 'a');
643   ASSERT_NO_ERROR(fs::create_directory(Twine(LongDir)));
644   // While we're here, prove that .. and . handling works in these long paths.
645   const char *DotDotDirs = "\\..\\.\\b";
646   LongDir.append(DotDotDirs);
647   ASSERT_NO_ERROR(fs::create_directory("b"));
648   ASSERT_EQ(fs::create_directory(Twine(LongDir), false), errc::file_exists);
649   // And clean up.
650   ASSERT_NO_ERROR(fs::remove("b"));
651   ASSERT_NO_ERROR(fs::remove(
652     Twine(LongDir.substr(0, LongDir.size() - strlen(DotDotDirs)))));
653   ASSERT_NE(::SetCurrentDirectoryA(PreviousDir), 0);
654 #endif
655 }
656 
657 TEST_F(FileSystemTest, DirectoryIteration) {
658   std::error_code ec;
659   for (fs::directory_iterator i(".", ec), e; i != e; i.increment(ec))
660     ASSERT_NO_ERROR(ec);
661 
662   // Create a known hierarchy to recurse over.
663   ASSERT_NO_ERROR(
664       fs::create_directories(Twine(TestDirectory) + "/recursive/a0/aa1"));
665   ASSERT_NO_ERROR(
666       fs::create_directories(Twine(TestDirectory) + "/recursive/a0/ab1"));
667   ASSERT_NO_ERROR(fs::create_directories(Twine(TestDirectory) +
668                                          "/recursive/dontlookhere/da1"));
669   ASSERT_NO_ERROR(
670       fs::create_directories(Twine(TestDirectory) + "/recursive/z0/za1"));
671   ASSERT_NO_ERROR(
672       fs::create_directories(Twine(TestDirectory) + "/recursive/pop/p1"));
673   typedef std::vector<std::string> v_t;
674   v_t visited;
675   for (fs::recursive_directory_iterator i(Twine(TestDirectory)
676          + "/recursive", ec), e; i != e; i.increment(ec)){
677     ASSERT_NO_ERROR(ec);
678     if (path::filename(i->path()) == "p1") {
679       i.pop();
680       // FIXME: recursive_directory_iterator should be more robust.
681       if (i == e) break;
682     }
683     if (path::filename(i->path()) == "dontlookhere")
684       i.no_push();
685     visited.push_back(path::filename(i->path()));
686   }
687   v_t::const_iterator a0 = find(visited, "a0");
688   v_t::const_iterator aa1 = find(visited, "aa1");
689   v_t::const_iterator ab1 = find(visited, "ab1");
690   v_t::const_iterator dontlookhere = find(visited, "dontlookhere");
691   v_t::const_iterator da1 = find(visited, "da1");
692   v_t::const_iterator z0 = find(visited, "z0");
693   v_t::const_iterator za1 = find(visited, "za1");
694   v_t::const_iterator pop = find(visited, "pop");
695   v_t::const_iterator p1 = find(visited, "p1");
696 
697   // Make sure that each path was visited correctly.
698   ASSERT_NE(a0, visited.end());
699   ASSERT_NE(aa1, visited.end());
700   ASSERT_NE(ab1, visited.end());
701   ASSERT_NE(dontlookhere, visited.end());
702   ASSERT_EQ(da1, visited.end()); // Not visited.
703   ASSERT_NE(z0, visited.end());
704   ASSERT_NE(za1, visited.end());
705   ASSERT_NE(pop, visited.end());
706   ASSERT_EQ(p1, visited.end()); // Not visited.
707 
708   // Make sure that parents were visited before children. No other ordering
709   // guarantees can be made across siblings.
710   ASSERT_LT(a0, aa1);
711   ASSERT_LT(a0, ab1);
712   ASSERT_LT(z0, za1);
713 
714   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/a0/aa1"));
715   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/a0/ab1"));
716   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/a0"));
717   ASSERT_NO_ERROR(
718       fs::remove(Twine(TestDirectory) + "/recursive/dontlookhere/da1"));
719   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/dontlookhere"));
720   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/pop/p1"));
721   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/pop"));
722   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/z0/za1"));
723   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/z0"));
724   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive"));
725 
726   // Test recursive_directory_iterator level()
727   ASSERT_NO_ERROR(
728       fs::create_directories(Twine(TestDirectory) + "/reclevel/a/b/c"));
729   fs::recursive_directory_iterator I(Twine(TestDirectory) + "/reclevel", ec), E;
730   for (int l = 0; I != E; I.increment(ec), ++l) {
731     ASSERT_NO_ERROR(ec);
732     EXPECT_EQ(I.level(), l);
733   }
734   EXPECT_EQ(I, E);
735   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/reclevel/a/b/c"));
736   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/reclevel/a/b"));
737   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/reclevel/a"));
738   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/reclevel"));
739 }
740 
741 const char archive[] = "!<arch>\x0A";
742 const char bitcode[] = "\xde\xc0\x17\x0b";
743 const char coff_object[] = "\x00\x00......";
744 const char coff_bigobj[] = "\x00\x00\xff\xff\x00\x02......"
745     "\xc7\xa1\xba\xd1\xee\xba\xa9\x4b\xaf\x20\xfa\xf6\x6a\xa4\xdc\xb8";
746 const char coff_import_library[] = "\x00\x00\xff\xff....";
747 const char elf_relocatable[] = { 0x7f, 'E', 'L', 'F', 1, 2, 1, 0, 0,
748                                  0,    0,   0,   0,   0, 0, 0, 0, 1 };
749 const char macho_universal_binary[] = "\xca\xfe\xba\xbe...\x00";
750 const char macho_object[] =
751     "\xfe\xed\xfa\xce........\x00\x00\x00\x01............";
752 const char macho_executable[] =
753     "\xfe\xed\xfa\xce........\x00\x00\x00\x02............";
754 const char macho_fixed_virtual_memory_shared_lib[] =
755     "\xfe\xed\xfa\xce........\x00\x00\x00\x03............";
756 const char macho_core[] =
757     "\xfe\xed\xfa\xce........\x00\x00\x00\x04............";
758 const char macho_preload_executable[] =
759     "\xfe\xed\xfa\xce........\x00\x00\x00\x05............";
760 const char macho_dynamically_linked_shared_lib[] =
761     "\xfe\xed\xfa\xce........\x00\x00\x00\x06............";
762 const char macho_dynamic_linker[] =
763     "\xfe\xed\xfa\xce........\x00\x00\x00\x07............";
764 const char macho_bundle[] =
765     "\xfe\xed\xfa\xce........\x00\x00\x00\x08............";
766 const char macho_dsym_companion[] =
767     "\xfe\xed\xfa\xce........\x00\x00\x00\x0a............";
768 const char macho_kext_bundle[] =
769     "\xfe\xed\xfa\xce........\x00\x00\x00\x0b............";
770 const char windows_resource[] = "\x00\x00\x00\x00\x020\x00\x00\x00\xff";
771 const char macho_dynamically_linked_shared_lib_stub[] =
772     "\xfe\xed\xfa\xce........\x00\x00\x00\x09............";
773 
774 TEST_F(FileSystemTest, Magic) {
775   struct type {
776     const char *filename;
777     const char *magic_str;
778     size_t magic_str_len;
779     fs::file_magic magic;
780   } types[] = {
781 #define DEFINE(magic)                                           \
782     { #magic, magic, sizeof(magic), fs::file_magic::magic }
783     DEFINE(archive),
784     DEFINE(bitcode),
785     DEFINE(coff_object),
786     { "coff_bigobj", coff_bigobj, sizeof(coff_bigobj), fs::file_magic::coff_object },
787     DEFINE(coff_import_library),
788     DEFINE(elf_relocatable),
789     DEFINE(macho_universal_binary),
790     DEFINE(macho_object),
791     DEFINE(macho_executable),
792     DEFINE(macho_fixed_virtual_memory_shared_lib),
793     DEFINE(macho_core),
794     DEFINE(macho_preload_executable),
795     DEFINE(macho_dynamically_linked_shared_lib),
796     DEFINE(macho_dynamic_linker),
797     DEFINE(macho_bundle),
798     DEFINE(macho_dynamically_linked_shared_lib_stub),
799     DEFINE(macho_dsym_companion),
800     DEFINE(macho_kext_bundle),
801     DEFINE(windows_resource)
802 #undef DEFINE
803     };
804 
805   // Create some files filled with magic.
806   for (type *i = types, *e = types + (sizeof(types) / sizeof(type)); i != e;
807                                                                      ++i) {
808     SmallString<128> file_pathname(TestDirectory);
809     path::append(file_pathname, i->filename);
810     std::error_code EC;
811     raw_fd_ostream file(file_pathname, EC, sys::fs::F_None);
812     ASSERT_FALSE(file.has_error());
813     StringRef magic(i->magic_str, i->magic_str_len);
814     file << magic;
815     file.close();
816     EXPECT_EQ(i->magic, fs::identify_magic(magic));
817     ASSERT_NO_ERROR(fs::remove(Twine(file_pathname)));
818   }
819 }
820 
821 #ifdef LLVM_ON_WIN32
822 TEST_F(FileSystemTest, CarriageReturn) {
823   SmallString<128> FilePathname(TestDirectory);
824   std::error_code EC;
825   path::append(FilePathname, "test");
826 
827   {
828     raw_fd_ostream File(FilePathname, EC, sys::fs::F_Text);
829     ASSERT_NO_ERROR(EC);
830     File << '\n';
831   }
832   {
833     auto Buf = MemoryBuffer::getFile(FilePathname.str());
834     EXPECT_TRUE((bool)Buf);
835     EXPECT_EQ(Buf.get()->getBuffer(), "\r\n");
836   }
837 
838   {
839     raw_fd_ostream File(FilePathname, EC, sys::fs::F_None);
840     ASSERT_NO_ERROR(EC);
841     File << '\n';
842   }
843   {
844     auto Buf = MemoryBuffer::getFile(FilePathname.str());
845     EXPECT_TRUE((bool)Buf);
846     EXPECT_EQ(Buf.get()->getBuffer(), "\n");
847   }
848   ASSERT_NO_ERROR(fs::remove(Twine(FilePathname)));
849 }
850 #endif
851 
852 TEST_F(FileSystemTest, Resize) {
853   int FD;
854   SmallString<64> TempPath;
855   ASSERT_NO_ERROR(fs::createTemporaryFile("prefix", "temp", FD, TempPath));
856   ASSERT_NO_ERROR(fs::resize_file(FD, 123));
857   fs::file_status Status;
858   ASSERT_NO_ERROR(fs::status(FD, Status));
859   ASSERT_EQ(Status.getSize(), 123U);
860   ::close(FD);
861   ASSERT_NO_ERROR(fs::remove(TempPath));
862 }
863 
864 TEST_F(FileSystemTest, FileMapping) {
865   // Create a temp file.
866   int FileDescriptor;
867   SmallString<64> TempPath;
868   ASSERT_NO_ERROR(
869       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
870   unsigned Size = 4096;
871   ASSERT_NO_ERROR(fs::resize_file(FileDescriptor, Size));
872 
873   // Map in temp file and add some content
874   std::error_code EC;
875   StringRef Val("hello there");
876   {
877     fs::mapped_file_region mfr(FileDescriptor,
878                                fs::mapped_file_region::readwrite, Size, 0, EC);
879     ASSERT_NO_ERROR(EC);
880     std::copy(Val.begin(), Val.end(), mfr.data());
881     // Explicitly add a 0.
882     mfr.data()[Val.size()] = 0;
883     // Unmap temp file
884   }
885   ASSERT_EQ(close(FileDescriptor), 0);
886 
887   // Map it back in read-only
888   {
889     int FD;
890     EC = fs::openFileForRead(Twine(TempPath), FD);
891     ASSERT_NO_ERROR(EC);
892     fs::mapped_file_region mfr(FD, fs::mapped_file_region::readonly, Size, 0, EC);
893     ASSERT_NO_ERROR(EC);
894 
895     // Verify content
896     EXPECT_EQ(StringRef(mfr.const_data()), Val);
897 
898     // Unmap temp file
899     fs::mapped_file_region m(FD, fs::mapped_file_region::readonly, Size, 0, EC);
900     ASSERT_NO_ERROR(EC);
901     ASSERT_EQ(close(FD), 0);
902   }
903   ASSERT_NO_ERROR(fs::remove(TempPath));
904 }
905 
906 TEST(Support, NormalizePath) {
907 #if defined(LLVM_ON_WIN32)
908 #define EXPECT_PATH_IS(path__, windows__, not_windows__)                        \
909   EXPECT_EQ(path__, windows__);
910 #else
911 #define EXPECT_PATH_IS(path__, windows__, not_windows__)                        \
912   EXPECT_EQ(path__, not_windows__);
913 #endif
914 
915   SmallString<64> Path1("a");
916   SmallString<64> Path2("a/b");
917   SmallString<64> Path3("a\\b");
918   SmallString<64> Path4("a\\\\b");
919   SmallString<64> Path5("\\a");
920   SmallString<64> Path6("a\\");
921 
922   path::native(Path1);
923   EXPECT_PATH_IS(Path1, "a", "a");
924 
925   path::native(Path2);
926   EXPECT_PATH_IS(Path2, "a\\b", "a/b");
927 
928   path::native(Path3);
929   EXPECT_PATH_IS(Path3, "a\\b", "a/b");
930 
931   path::native(Path4);
932   EXPECT_PATH_IS(Path4, "a\\\\b", "a\\\\b");
933 
934   path::native(Path5);
935   EXPECT_PATH_IS(Path5, "\\a", "/a");
936 
937   path::native(Path6);
938   EXPECT_PATH_IS(Path6, "a\\", "a/");
939 
940 #undef EXPECT_PATH_IS
941 }
942 
943 TEST(Support, RemoveLeadingDotSlash) {
944   StringRef Path1("././/foolz/wat");
945   StringRef Path2("./////");
946 
947   Path1 = path::remove_leading_dotslash(Path1);
948   EXPECT_EQ(Path1, "foolz/wat");
949   Path2 = path::remove_leading_dotslash(Path2);
950   EXPECT_EQ(Path2, "");
951 }
952 
953 static std::string remove_dots(StringRef path,
954     bool remove_dot_dot) {
955   SmallString<256> buffer(path);
956   path::remove_dots(buffer, remove_dot_dot);
957   return buffer.str();
958 }
959 
960 TEST(Support, RemoveDots) {
961 #if defined(LLVM_ON_WIN32)
962   EXPECT_EQ("foolz\\wat", remove_dots(".\\.\\\\foolz\\wat", false));
963   EXPECT_EQ("", remove_dots(".\\\\\\\\\\", false));
964 
965   EXPECT_EQ("a\\..\\b\\c", remove_dots(".\\a\\..\\b\\c", false));
966   EXPECT_EQ("b\\c", remove_dots(".\\a\\..\\b\\c", true));
967   EXPECT_EQ("c", remove_dots(".\\.\\c", true));
968   EXPECT_EQ("..\\a\\c", remove_dots("..\\a\\b\\..\\c", true));
969   EXPECT_EQ("..\\..\\a\\c", remove_dots("..\\..\\a\\b\\..\\c", true));
970 
971   SmallString<64> Path1(".\\.\\c");
972   EXPECT_TRUE(path::remove_dots(Path1, true));
973   EXPECT_EQ("c", Path1);
974 #else
975   EXPECT_EQ("foolz/wat", remove_dots("././/foolz/wat", false));
976   EXPECT_EQ("", remove_dots("./////", false));
977 
978   EXPECT_EQ("a/../b/c", remove_dots("./a/../b/c", false));
979   EXPECT_EQ("b/c", remove_dots("./a/../b/c", true));
980   EXPECT_EQ("c", remove_dots("././c", true));
981   EXPECT_EQ("../a/c", remove_dots("../a/b/../c", true));
982   EXPECT_EQ("../../a/c", remove_dots("../../a/b/../c", true));
983 
984   SmallString<64> Path1("././c");
985   EXPECT_TRUE(path::remove_dots(Path1, true));
986   EXPECT_EQ("c", Path1);
987 #endif
988 }
989 
990 TEST(Support, ReplacePathPrefix) {
991   SmallString<64> Path1("/foo");
992   SmallString<64> Path2("/old/foo");
993   SmallString<64> OldPrefix("/old");
994   SmallString<64> NewPrefix("/new");
995   SmallString<64> NewPrefix2("/longernew");
996   SmallString<64> EmptyPrefix("");
997 
998   SmallString<64> Path = Path1;
999   path::replace_path_prefix(Path, OldPrefix, NewPrefix);
1000   EXPECT_EQ(Path, "/foo");
1001   Path = Path2;
1002   path::replace_path_prefix(Path, OldPrefix, NewPrefix);
1003   EXPECT_EQ(Path, "/new/foo");
1004   Path = Path2;
1005   path::replace_path_prefix(Path, OldPrefix, NewPrefix2);
1006   EXPECT_EQ(Path, "/longernew/foo");
1007   Path = Path1;
1008   path::replace_path_prefix(Path, EmptyPrefix, NewPrefix);
1009   EXPECT_EQ(Path, "/new/foo");
1010   Path = Path2;
1011   path::replace_path_prefix(Path, OldPrefix, EmptyPrefix);
1012   EXPECT_EQ(Path, "/foo");
1013 }
1014 
1015 TEST_F(FileSystemTest, PathFromFD) {
1016   // Create a temp file.
1017   int FileDescriptor;
1018   SmallString<64> TempPath;
1019   ASSERT_NO_ERROR(
1020       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
1021   FileRemover Cleanup(TempPath);
1022 
1023   // Make sure it exists.
1024   ASSERT_TRUE(sys::fs::exists(Twine(TempPath)));
1025 
1026   // Try to get the path from the file descriptor
1027   SmallString<64> ResultPath;
1028   std::error_code ErrorCode =
1029       fs::getPathFromOpenFD(FileDescriptor, ResultPath);
1030 
1031   // If we succeeded, check that the paths are the same (modulo case):
1032   if (!ErrorCode) {
1033     // The paths returned by createTemporaryFile and getPathFromOpenFD
1034     // should reference the same file on disk.
1035     fs::UniqueID D1, D2;
1036     ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), D1));
1037     ASSERT_NO_ERROR(fs::getUniqueID(Twine(ResultPath), D2));
1038     ASSERT_EQ(D1, D2);
1039   }
1040 
1041   ::close(FileDescriptor);
1042 }
1043 
1044 TEST_F(FileSystemTest, PathFromFDWin32) {
1045   // Create a temp file.
1046   int FileDescriptor;
1047   SmallString<64> TempPath;
1048   ASSERT_NO_ERROR(
1049     fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
1050   FileRemover Cleanup(TempPath);
1051 
1052   // Make sure it exists.
1053   ASSERT_TRUE(sys::fs::exists(Twine(TempPath)));
1054 
1055   SmallVector<char, 8> ResultPath;
1056   std::error_code ErrorCode =
1057     fs::getPathFromOpenFD(FileDescriptor, ResultPath);
1058 
1059   if (!ErrorCode) {
1060     // Now that we know how much space is required for the path, create a path
1061     // buffer with exactly enough space (sans null terminator, which should not
1062     // be present), and call getPathFromOpenFD again to ensure that the API
1063     // properly handles exactly-sized buffers.
1064     SmallVector<char, 8> ExactSizedPath(ResultPath.size());
1065     ErrorCode = fs::getPathFromOpenFD(FileDescriptor, ExactSizedPath);
1066     ResultPath = ExactSizedPath;
1067   }
1068 
1069   if (!ErrorCode) {
1070     fs::UniqueID D1, D2;
1071     ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), D1));
1072     ASSERT_NO_ERROR(fs::getUniqueID(Twine(ResultPath), D2));
1073     ASSERT_EQ(D1, D2);
1074   }
1075   ::close(FileDescriptor);
1076 }
1077 
1078 TEST_F(FileSystemTest, PathFromFDUnicode) {
1079   // Create a temp file.
1080   int FileDescriptor;
1081   SmallString<64> TempPath;
1082 
1083   // Test Unicode: "<temp directory>/(pi)r^2<temp rand chars>.aleth.0"
1084   ASSERT_NO_ERROR(
1085     fs::createTemporaryFile("\xCF\x80r\xC2\xB2",
1086                             "\xE2\x84\xB5.0", FileDescriptor, TempPath));
1087   FileRemover Cleanup(TempPath);
1088 
1089   // Make sure it exists.
1090   ASSERT_TRUE(sys::fs::exists(Twine(TempPath)));
1091 
1092   SmallVector<char, 8> ResultPath;
1093   std::error_code ErrorCode =
1094     fs::getPathFromOpenFD(FileDescriptor, ResultPath);
1095 
1096   if (!ErrorCode) {
1097     fs::UniqueID D1, D2;
1098     ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), D1));
1099     ASSERT_NO_ERROR(fs::getUniqueID(Twine(ResultPath), D2));
1100     ASSERT_EQ(D1, D2);
1101   }
1102   ::close(FileDescriptor);
1103 }
1104 
1105 TEST_F(FileSystemTest, OpenFileForRead) {
1106   // Create a temp file.
1107   int FileDescriptor;
1108   SmallString<64> TempPath;
1109   ASSERT_NO_ERROR(
1110       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
1111   FileRemover Cleanup(TempPath);
1112 
1113   // Make sure it exists.
1114   ASSERT_TRUE(sys::fs::exists(Twine(TempPath)));
1115 
1116   // Open the file for read
1117   int FileDescriptor2;
1118   SmallString<64> ResultPath;
1119   ASSERT_NO_ERROR(
1120       fs::openFileForRead(Twine(TempPath), FileDescriptor2, &ResultPath))
1121 
1122   // If we succeeded, check that the paths are the same (modulo case):
1123   if (!ResultPath.empty()) {
1124     // The paths returned by createTemporaryFile and getPathFromOpenFD
1125     // should reference the same file on disk.
1126     fs::UniqueID D1, D2;
1127     ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), D1));
1128     ASSERT_NO_ERROR(fs::getUniqueID(Twine(ResultPath), D2));
1129     ASSERT_EQ(D1, D2);
1130   }
1131 
1132   ::close(FileDescriptor);
1133 }
1134 } // anonymous namespace
1135