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/ErrorHandling.h"
12 #include "llvm/Support/FileSystem.h"
13 #include "llvm/Support/MemoryBuffer.h"
14 #include "llvm/Support/raw_ostream.h"
15 #include "gtest/gtest.h"
16 
17 using namespace llvm;
18 using namespace llvm::sys;
19 
20 #define ASSERT_NO_ERROR(x) \
21   if (error_code ASSERT_NO_ERROR_ec = x) { \
22     SmallString<128> MessageStorage; \
23     raw_svector_ostream Message(MessageStorage); \
24     Message << #x ": did not return errc::success.\n" \
25             << "error number: " << ASSERT_NO_ERROR_ec.value() << "\n" \
26             << "error message: " << ASSERT_NO_ERROR_ec.message() << "\n"; \
27     GTEST_FATAL_FAILURE_(MessageStorage.c_str()); \
28   } else {}
29 
30 namespace {
31 
32 TEST(is_separator, Works) {
33   EXPECT_TRUE(path::is_separator('/'));
34   EXPECT_FALSE(path::is_separator('\0'));
35   EXPECT_FALSE(path::is_separator('-'));
36   EXPECT_FALSE(path::is_separator(' '));
37 
38 #ifdef LLVM_ON_WIN32
39   EXPECT_TRUE(path::is_separator('\\'));
40 #else
41   EXPECT_FALSE(path::is_separator('\\'));
42 #endif
43 }
44 
45 TEST(Support, Path) {
46   SmallVector<StringRef, 40> paths;
47   paths.push_back("");
48   paths.push_back(".");
49   paths.push_back("..");
50   paths.push_back("foo");
51   paths.push_back("/");
52   paths.push_back("/foo");
53   paths.push_back("foo/");
54   paths.push_back("/foo/");
55   paths.push_back("foo/bar");
56   paths.push_back("/foo/bar");
57   paths.push_back("//net");
58   paths.push_back("//net/foo");
59   paths.push_back("///foo///");
60   paths.push_back("///foo///bar");
61   paths.push_back("/.");
62   paths.push_back("./");
63   paths.push_back("/..");
64   paths.push_back("../");
65   paths.push_back("foo/.");
66   paths.push_back("foo/..");
67   paths.push_back("foo/./");
68   paths.push_back("foo/./bar");
69   paths.push_back("foo/..");
70   paths.push_back("foo/../");
71   paths.push_back("foo/../bar");
72   paths.push_back("c:");
73   paths.push_back("c:/");
74   paths.push_back("c:foo");
75   paths.push_back("c:/foo");
76   paths.push_back("c:foo/");
77   paths.push_back("c:/foo/");
78   paths.push_back("c:/foo/bar");
79   paths.push_back("prn:");
80   paths.push_back("c:\\");
81   paths.push_back("c:foo");
82   paths.push_back("c:\\foo");
83   paths.push_back("c:foo\\");
84   paths.push_back("c:\\foo\\");
85   paths.push_back("c:\\foo/");
86   paths.push_back("c:/foo\\bar");
87 
88   for (SmallVector<StringRef, 40>::const_iterator i = paths.begin(),
89                                                   e = paths.end();
90                                                   i != e;
91                                                   ++i) {
92     for (sys::path::const_iterator ci = sys::path::begin(*i),
93                                    ce = sys::path::end(*i);
94                                    ci != ce;
95                                    ++ci) {
96       ASSERT_FALSE(ci->empty());
97     }
98 
99 #if 0 // Valgrind is whining about this.
100     outs() << "    Reverse Iteration: [";
101     for (sys::path::reverse_iterator ci = sys::path::rbegin(*i),
102                                      ce = sys::path::rend(*i);
103                                      ci != ce;
104                                      ++ci) {
105       outs() << *ci << ',';
106     }
107     outs() << "]\n";
108 #endif
109 
110     path::has_root_path(*i);
111     path::root_path(*i);
112     path::has_root_name(*i);
113     path::root_name(*i);
114     path::has_root_directory(*i);
115     path::root_directory(*i);
116     path::has_parent_path(*i);
117     path::parent_path(*i);
118     path::has_filename(*i);
119     path::filename(*i);
120     path::has_stem(*i);
121     path::stem(*i);
122     path::has_extension(*i);
123     path::extension(*i);
124     path::is_absolute(*i);
125     path::is_relative(*i);
126 
127     SmallString<128> temp_store;
128     temp_store = *i;
129     ASSERT_NO_ERROR(fs::make_absolute(temp_store));
130     temp_store = *i;
131     path::remove_filename(temp_store);
132 
133     temp_store = *i;
134     path::replace_extension(temp_store, "ext");
135     StringRef filename(temp_store.begin(), temp_store.size()), stem, ext;
136     stem = path::stem(filename);
137     ext  = path::extension(filename);
138     EXPECT_EQ(*(--sys::path::end(filename)), (stem + ext).str());
139 
140     path::native(*i, temp_store);
141   }
142 }
143 
144 TEST(Support, RelativePathIterator) {
145   SmallString<64> Path(StringRef("c/d/e/foo.txt"));
146   typedef SmallVector<StringRef, 4> PathComponents;
147   PathComponents ExpectedPathComponents;
148   PathComponents ActualPathComponents;
149 
150   StringRef(Path).split(ExpectedPathComponents, "/");
151 
152   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
153        ++I) {
154     ActualPathComponents.push_back(*I);
155   }
156 
157   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
158 
159   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
160     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
161   }
162 }
163 
164 TEST(Support, AbsolutePathIterator) {
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   // The root path will also be a component when iterating
173   ExpectedPathComponents[0] = "/";
174 
175   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
176        ++I) {
177     ActualPathComponents.push_back(*I);
178   }
179 
180   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
181 
182   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
183     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
184   }
185 }
186 
187 #ifdef LLVM_ON_WIN32
188 TEST(Support, AbsolutePathIteratorWin32) {
189   SmallString<64> Path(StringRef("c:\\c\\e\\foo.txt"));
190   typedef SmallVector<StringRef, 4> PathComponents;
191   PathComponents ExpectedPathComponents;
192   PathComponents ActualPathComponents;
193 
194   StringRef(Path).split(ExpectedPathComponents, "\\");
195 
196   // The root path (which comes after the drive name) will also be a component
197   // when iterating.
198   ExpectedPathComponents.insert(ExpectedPathComponents.begin()+1, "\\");
199 
200   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
201        ++I) {
202     ActualPathComponents.push_back(*I);
203   }
204 
205   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
206 
207   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
208     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
209   }
210 }
211 #endif // LLVM_ON_WIN32
212 
213 TEST(Support, AbsolutePathIteratorEnd) {
214   // Trailing slashes are converted to '.' unless they are part of the root path.
215   SmallVector<StringRef, 4> Paths;
216   Paths.push_back("/foo/");
217   Paths.push_back("/foo//");
218   Paths.push_back("//net//");
219 #ifdef LLVM_ON_WIN32
220   Paths.push_back("c:\\\\");
221 #endif
222 
223   for (StringRef Path : Paths) {
224     StringRef LastComponent = *--path::end(Path);
225     EXPECT_EQ(".", LastComponent);
226   }
227 
228   SmallVector<StringRef, 3> RootPaths;
229   RootPaths.push_back("/");
230   RootPaths.push_back("//net/");
231 #ifdef LLVM_ON_WIN32
232   RootPaths.push_back("c:\\");
233 #endif
234 
235   for (StringRef Path : RootPaths) {
236     StringRef LastComponent = *--path::end(Path);
237     EXPECT_EQ(1u, LastComponent.size());
238     EXPECT_TRUE(path::is_separator(LastComponent[0]));
239   }
240 }
241 
242 TEST(Support, HomeDirectory) {
243 #ifdef LLVM_ON_UNIX
244   // This test only makes sense on Unix if $HOME is set.
245   if (::getenv("HOME")) {
246 #endif
247     SmallString<128> HomeDir;
248     EXPECT_TRUE(path::home_directory(HomeDir));
249     EXPECT_FALSE(HomeDir.empty());
250 #ifdef LLVM_ON_UNIX
251   }
252 #endif
253 }
254 
255 class FileSystemTest : public testing::Test {
256 protected:
257   /// Unique temporary directory in which all created filesystem entities must
258   /// be placed. It is recursively removed at the end of each test.
259   SmallString<128> TestDirectory;
260 
261   virtual void SetUp() {
262     ASSERT_NO_ERROR(
263         fs::createUniqueDirectory("file-system-test", TestDirectory));
264     // We don't care about this specific file.
265     errs() << "Test Directory: " << TestDirectory << '\n';
266     errs().flush();
267   }
268 
269   virtual void TearDown() {
270     ASSERT_NO_ERROR(fs::remove(TestDirectory.str()));
271   }
272 };
273 
274 TEST_F(FileSystemTest, Unique) {
275   // Create a temp file.
276   int FileDescriptor;
277   SmallString<64> TempPath;
278   ASSERT_NO_ERROR(
279       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
280 
281   // The same file should return an identical unique id.
282   fs::UniqueID F1, F2;
283   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), F1));
284   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), F2));
285   ASSERT_EQ(F1, F2);
286 
287   // Different files should return different unique ids.
288   int FileDescriptor2;
289   SmallString<64> TempPath2;
290   ASSERT_NO_ERROR(
291       fs::createTemporaryFile("prefix", "temp", FileDescriptor2, TempPath2));
292 
293   fs::UniqueID D;
294   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath2), D));
295   ASSERT_NE(D, F1);
296   ::close(FileDescriptor2);
297 
298   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
299 
300   // Two paths representing the same file on disk should still provide the
301   // same unique id.  We can test this by making a hard link.
302   ASSERT_NO_ERROR(fs::create_link(Twine(TempPath), Twine(TempPath2)));
303   fs::UniqueID D2;
304   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath2), D2));
305   ASSERT_EQ(D2, F1);
306 
307   ::close(FileDescriptor);
308 
309   SmallString<128> Dir1;
310   ASSERT_NO_ERROR(
311      fs::createUniqueDirectory("dir1", Dir1));
312   ASSERT_NO_ERROR(fs::getUniqueID(Dir1.c_str(), F1));
313   ASSERT_NO_ERROR(fs::getUniqueID(Dir1.c_str(), F2));
314   ASSERT_EQ(F1, F2);
315 
316   SmallString<128> Dir2;
317   ASSERT_NO_ERROR(
318      fs::createUniqueDirectory("dir2", Dir2));
319   ASSERT_NO_ERROR(fs::getUniqueID(Dir2.c_str(), F2));
320   ASSERT_NE(F1, F2);
321 }
322 
323 TEST_F(FileSystemTest, TempFiles) {
324   // Create a temp file.
325   int FileDescriptor;
326   SmallString<64> TempPath;
327   ASSERT_NO_ERROR(
328       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
329 
330   // Make sure it exists.
331   bool TempFileExists;
332   ASSERT_NO_ERROR(sys::fs::exists(Twine(TempPath), TempFileExists));
333   EXPECT_TRUE(TempFileExists);
334 
335   // Create another temp tile.
336   int FD2;
337   SmallString<64> TempPath2;
338   ASSERT_NO_ERROR(fs::createTemporaryFile("prefix", "temp", FD2, TempPath2));
339   ASSERT_TRUE(TempPath2.endswith(".temp"));
340   ASSERT_NE(TempPath.str(), TempPath2.str());
341 
342   fs::file_status A, B;
343   ASSERT_NO_ERROR(fs::status(Twine(TempPath), A));
344   ASSERT_NO_ERROR(fs::status(Twine(TempPath2), B));
345   EXPECT_FALSE(fs::equivalent(A, B));
346 
347   ::close(FD2);
348 
349   // Remove Temp2.
350   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
351   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
352   ASSERT_EQ(fs::remove(Twine(TempPath2), false),
353             errc::no_such_file_or_directory);
354 
355   error_code EC = fs::status(TempPath2.c_str(), B);
356   EXPECT_EQ(EC, errc::no_such_file_or_directory);
357   EXPECT_EQ(B.type(), fs::file_type::file_not_found);
358 
359   // Make sure Temp2 doesn't exist.
360   ASSERT_NO_ERROR(fs::exists(Twine(TempPath2), TempFileExists));
361   EXPECT_FALSE(TempFileExists);
362 
363   SmallString<64> TempPath3;
364   ASSERT_NO_ERROR(fs::createTemporaryFile("prefix", "", TempPath3));
365   ASSERT_FALSE(TempPath3.endswith("."));
366 
367   // Create a hard link to Temp1.
368   ASSERT_NO_ERROR(fs::create_link(Twine(TempPath), Twine(TempPath2)));
369   bool equal;
370   ASSERT_NO_ERROR(fs::equivalent(Twine(TempPath), Twine(TempPath2), equal));
371   EXPECT_TRUE(equal);
372   ASSERT_NO_ERROR(fs::status(Twine(TempPath), A));
373   ASSERT_NO_ERROR(fs::status(Twine(TempPath2), B));
374   EXPECT_TRUE(fs::equivalent(A, B));
375 
376   // Remove Temp1.
377   ::close(FileDescriptor);
378   ASSERT_NO_ERROR(fs::remove(Twine(TempPath)));
379 
380   // Remove the hard link.
381   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
382 
383   // Make sure Temp1 doesn't exist.
384   ASSERT_NO_ERROR(fs::exists(Twine(TempPath), TempFileExists));
385   EXPECT_FALSE(TempFileExists);
386 
387 #ifdef LLVM_ON_WIN32
388   // Path name > 260 chars should get an error.
389   const char *Path270 =
390     "abcdefghijklmnopqrstuvwxyz9abcdefghijklmnopqrstuvwxyz8"
391     "abcdefghijklmnopqrstuvwxyz7abcdefghijklmnopqrstuvwxyz6"
392     "abcdefghijklmnopqrstuvwxyz5abcdefghijklmnopqrstuvwxyz4"
393     "abcdefghijklmnopqrstuvwxyz3abcdefghijklmnopqrstuvwxyz2"
394     "abcdefghijklmnopqrstuvwxyz1abcdefghijklmnopqrstuvwxyz0";
395   EXPECT_EQ(fs::createUniqueFile(Twine(Path270), FileDescriptor, TempPath),
396             windows_error::path_not_found);
397 #endif
398 }
399 
400 TEST_F(FileSystemTest, CreateDir) {
401   ASSERT_NO_ERROR(fs::create_directory(Twine(TestDirectory) + "foo"));
402   ASSERT_NO_ERROR(fs::create_directory(Twine(TestDirectory) + "foo"));
403   ASSERT_EQ(fs::create_directory(Twine(TestDirectory) + "foo", false),
404             errc::file_exists);
405   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "foo"));
406 }
407 
408 TEST_F(FileSystemTest, DirectoryIteration) {
409   error_code ec;
410   for (fs::directory_iterator i(".", ec), e; i != e; i.increment(ec))
411     ASSERT_NO_ERROR(ec);
412 
413   // Create a known hierarchy to recurse over.
414   ASSERT_NO_ERROR(
415       fs::create_directories(Twine(TestDirectory) + "/recursive/a0/aa1"));
416   ASSERT_NO_ERROR(
417       fs::create_directories(Twine(TestDirectory) + "/recursive/a0/ab1"));
418   ASSERT_NO_ERROR(fs::create_directories(Twine(TestDirectory) +
419                                          "/recursive/dontlookhere/da1"));
420   ASSERT_NO_ERROR(
421       fs::create_directories(Twine(TestDirectory) + "/recursive/z0/za1"));
422   ASSERT_NO_ERROR(
423       fs::create_directories(Twine(TestDirectory) + "/recursive/pop/p1"));
424   typedef std::vector<std::string> v_t;
425   v_t visited;
426   for (fs::recursive_directory_iterator i(Twine(TestDirectory)
427          + "/recursive", ec), e; i != e; i.increment(ec)){
428     ASSERT_NO_ERROR(ec);
429     if (path::filename(i->path()) == "p1") {
430       i.pop();
431       // FIXME: recursive_directory_iterator should be more robust.
432       if (i == e) break;
433     }
434     if (path::filename(i->path()) == "dontlookhere")
435       i.no_push();
436     visited.push_back(path::filename(i->path()));
437   }
438   v_t::const_iterator a0 = std::find(visited.begin(), visited.end(), "a0");
439   v_t::const_iterator aa1 = std::find(visited.begin(), visited.end(), "aa1");
440   v_t::const_iterator ab1 = std::find(visited.begin(), visited.end(), "ab1");
441   v_t::const_iterator dontlookhere = std::find(visited.begin(), visited.end(),
442                                                "dontlookhere");
443   v_t::const_iterator da1 = std::find(visited.begin(), visited.end(), "da1");
444   v_t::const_iterator z0 = std::find(visited.begin(), visited.end(), "z0");
445   v_t::const_iterator za1 = std::find(visited.begin(), visited.end(), "za1");
446   v_t::const_iterator pop = std::find(visited.begin(), visited.end(), "pop");
447   v_t::const_iterator p1 = std::find(visited.begin(), visited.end(), "p1");
448 
449   // Make sure that each path was visited correctly.
450   ASSERT_NE(a0, visited.end());
451   ASSERT_NE(aa1, visited.end());
452   ASSERT_NE(ab1, visited.end());
453   ASSERT_NE(dontlookhere, visited.end());
454   ASSERT_EQ(da1, visited.end()); // Not visited.
455   ASSERT_NE(z0, visited.end());
456   ASSERT_NE(za1, visited.end());
457   ASSERT_NE(pop, visited.end());
458   ASSERT_EQ(p1, visited.end()); // Not visited.
459 
460   // Make sure that parents were visited before children. No other ordering
461   // guarantees can be made across siblings.
462   ASSERT_LT(a0, aa1);
463   ASSERT_LT(a0, ab1);
464   ASSERT_LT(z0, za1);
465 
466   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/a0/aa1"));
467   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/a0/ab1"));
468   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/a0"));
469   ASSERT_NO_ERROR(
470       fs::remove(Twine(TestDirectory) + "/recursive/dontlookhere/da1"));
471   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/dontlookhere"));
472   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/pop/p1"));
473   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/pop"));
474   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/z0/za1"));
475   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/z0"));
476   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive"));
477 }
478 
479 const char archive[] = "!<arch>\x0A";
480 const char bitcode[] = "\xde\xc0\x17\x0b";
481 const char coff_object[] = "\x00\x00......";
482 const char coff_import_library[] = "\x00\x00\xff\xff....";
483 const char elf_relocatable[] = { 0x7f, 'E', 'L', 'F', 1, 2, 1, 0, 0,
484                                  0,    0,   0,   0,   0, 0, 0, 0, 1 };
485 const char macho_universal_binary[] = "\xca\xfe\xba\xbe...\0x00";
486 const char macho_object[] = "\xfe\xed\xfa\xce..........\x00\x01";
487 const char macho_executable[] = "\xfe\xed\xfa\xce..........\x00\x02";
488 const char macho_fixed_virtual_memory_shared_lib[] =
489     "\xfe\xed\xfa\xce..........\x00\x03";
490 const char macho_core[] = "\xfe\xed\xfa\xce..........\x00\x04";
491 const char macho_preload_executable[] = "\xfe\xed\xfa\xce..........\x00\x05";
492 const char macho_dynamically_linked_shared_lib[] =
493     "\xfe\xed\xfa\xce..........\x00\x06";
494 const char macho_dynamic_linker[] = "\xfe\xed\xfa\xce..........\x00\x07";
495 const char macho_bundle[] = "\xfe\xed\xfa\xce..........\x00\x08";
496 const char macho_dsym_companion[] = "\xfe\xed\xfa\xce..........\x00\x0a";
497 const char windows_resource[] = "\x00\x00\x00\x00\x020\x00\x00\x00\xff";
498 
499 TEST_F(FileSystemTest, Magic) {
500   struct type {
501     const char *filename;
502     const char *magic_str;
503     size_t magic_str_len;
504     fs::file_magic magic;
505   } types[] = {
506 #define DEFINE(magic)                                           \
507     { #magic, magic, sizeof(magic), fs::file_magic::magic }
508     DEFINE(archive),
509     DEFINE(bitcode),
510     DEFINE(coff_object),
511     DEFINE(coff_import_library),
512     DEFINE(elf_relocatable),
513     DEFINE(macho_universal_binary),
514     DEFINE(macho_object),
515     DEFINE(macho_executable),
516     DEFINE(macho_fixed_virtual_memory_shared_lib),
517     DEFINE(macho_core),
518     DEFINE(macho_preload_executable),
519     DEFINE(macho_dynamically_linked_shared_lib),
520     DEFINE(macho_dynamic_linker),
521     DEFINE(macho_bundle),
522     DEFINE(macho_dsym_companion),
523     DEFINE(windows_resource)
524 #undef DEFINE
525     };
526 
527   // Create some files filled with magic.
528   for (type *i = types, *e = types + (sizeof(types) / sizeof(type)); i != e;
529                                                                      ++i) {
530     SmallString<128> file_pathname(TestDirectory);
531     path::append(file_pathname, i->filename);
532     std::string ErrMsg;
533     raw_fd_ostream file(file_pathname.c_str(), ErrMsg, sys::fs::F_None);
534     ASSERT_FALSE(file.has_error());
535     StringRef magic(i->magic_str, i->magic_str_len);
536     file << magic;
537     file.close();
538     bool res = false;
539     ASSERT_NO_ERROR(fs::has_magic(file_pathname.c_str(), magic, res));
540     EXPECT_TRUE(res);
541     EXPECT_EQ(i->magic, fs::identify_magic(magic));
542     ASSERT_NO_ERROR(fs::remove(Twine(file_pathname)));
543   }
544 }
545 
546 #ifdef LLVM_ON_WIN32
547 TEST_F(FileSystemTest, CarriageReturn) {
548   SmallString<128> FilePathname(TestDirectory);
549   std::string ErrMsg;
550   path::append(FilePathname, "test");
551 
552   {
553     raw_fd_ostream File(FilePathname.c_str(), ErrMsg, sys::fs::F_Text);
554     EXPECT_EQ(ErrMsg, "");
555     File << '\n';
556   }
557   {
558     std::unique_ptr<MemoryBuffer> Buf;
559     MemoryBuffer::getFile(FilePathname.c_str(), Buf);
560     EXPECT_EQ(Buf->getBuffer(), "\r\n");
561   }
562 
563   {
564     raw_fd_ostream File(FilePathname.c_str(), ErrMsg, sys::fs::F_None);
565     EXPECT_EQ(ErrMsg, "");
566     File << '\n';
567   }
568   {
569     std::unique_ptr<MemoryBuffer> Buf;
570     MemoryBuffer::getFile(FilePathname.c_str(), Buf);
571     EXPECT_EQ(Buf->getBuffer(), "\n");
572   }
573   ASSERT_NO_ERROR(fs::remove(Twine(FilePathname)));
574 }
575 #endif
576 
577 TEST_F(FileSystemTest, FileMapping) {
578   // Create a temp file.
579   int FileDescriptor;
580   SmallString<64> TempPath;
581   ASSERT_NO_ERROR(
582       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
583   // Map in temp file and add some content
584   error_code EC;
585   StringRef Val("hello there");
586   {
587     fs::mapped_file_region mfr(FileDescriptor,
588                                true,
589                                fs::mapped_file_region::readwrite,
590                                4096,
591                                0,
592                                EC);
593     ASSERT_NO_ERROR(EC);
594     std::copy(Val.begin(), Val.end(), mfr.data());
595     // Explicitly add a 0.
596     mfr.data()[Val.size()] = 0;
597     // Unmap temp file
598   }
599 
600   // Map it back in read-only
601   fs::mapped_file_region mfr(Twine(TempPath),
602                              fs::mapped_file_region::readonly,
603                              0,
604                              0,
605                              EC);
606   ASSERT_NO_ERROR(EC);
607 
608   // Verify content
609   EXPECT_EQ(StringRef(mfr.const_data()), Val);
610 
611   // Unmap temp file
612 
613   fs::mapped_file_region m(Twine(TempPath),
614                              fs::mapped_file_region::readonly,
615                              0,
616                              0,
617                              EC);
618   ASSERT_NO_ERROR(EC);
619   const char *Data = m.const_data();
620   fs::mapped_file_region mfrrv(std::move(m));
621   EXPECT_EQ(mfrrv.const_data(), Data);
622 }
623 
624 TEST(Support, NormalizePath) {
625 #if defined(LLVM_ON_WIN32)
626 #define EXPECT_PATH_IS(path__, windows__, not_windows__)                        \
627   EXPECT_EQ(path__, windows__);
628 #else
629 #define EXPECT_PATH_IS(path__, windows__, not_windows__)                        \
630   EXPECT_EQ(path__, not_windows__);
631 #endif
632 
633   SmallString<64> Path1("a");
634   SmallString<64> Path2("a/b");
635   SmallString<64> Path3("a\\b");
636   SmallString<64> Path4("a\\\\b");
637   SmallString<64> Path5("\\a");
638   SmallString<64> Path6("a\\");
639 
640   ASSERT_NO_ERROR(fs::normalize_separators(Path1));
641   EXPECT_PATH_IS(Path1, "a", "a");
642 
643   ASSERT_NO_ERROR(fs::normalize_separators(Path2));
644   EXPECT_PATH_IS(Path2, "a/b", "a/b");
645 
646   ASSERT_NO_ERROR(fs::normalize_separators(Path3));
647   EXPECT_PATH_IS(Path3, "a\\b", "a/b");
648 
649   ASSERT_NO_ERROR(fs::normalize_separators(Path4));
650   EXPECT_PATH_IS(Path4, "a\\\\b", "a\\\\b");
651 
652   ASSERT_NO_ERROR(fs::normalize_separators(Path5));
653   EXPECT_PATH_IS(Path5, "\\a", "/a");
654 
655   ASSERT_NO_ERROR(fs::normalize_separators(Path6));
656   EXPECT_PATH_IS(Path6, "a\\", "a/");
657 
658 #undef EXPECT_PATH_IS
659 }
660 } // anonymous namespace
661