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 <winerror.h>
20 #endif
21 
22 using namespace llvm;
23 using namespace llvm::sys;
24 
25 #define ASSERT_NO_ERROR(x)                                                     \
26   if (std::error_code ASSERT_NO_ERROR_ec = x) {                                \
27     SmallString<128> MessageStorage;                                           \
28     raw_svector_ostream Message(MessageStorage);                               \
29     Message << #x ": did not return errc::success.\n"                          \
30             << "error number: " << ASSERT_NO_ERROR_ec.value() << "\n"          \
31             << "error message: " << ASSERT_NO_ERROR_ec.message() << "\n";      \
32     GTEST_FATAL_FAILURE_(MessageStorage.c_str());                              \
33   } else {                                                                     \
34   }
35 
36 namespace {
37 
38 TEST(is_separator, Works) {
39   EXPECT_TRUE(path::is_separator('/'));
40   EXPECT_FALSE(path::is_separator('\0'));
41   EXPECT_FALSE(path::is_separator('-'));
42   EXPECT_FALSE(path::is_separator(' '));
43 
44 #ifdef LLVM_ON_WIN32
45   EXPECT_TRUE(path::is_separator('\\'));
46 #else
47   EXPECT_FALSE(path::is_separator('\\'));
48 #endif
49 }
50 
51 TEST(Support, Path) {
52   SmallVector<StringRef, 40> paths;
53   paths.push_back("");
54   paths.push_back(".");
55   paths.push_back("..");
56   paths.push_back("foo");
57   paths.push_back("/");
58   paths.push_back("/foo");
59   paths.push_back("foo/");
60   paths.push_back("/foo/");
61   paths.push_back("foo/bar");
62   paths.push_back("/foo/bar");
63   paths.push_back("//net");
64   paths.push_back("//net/foo");
65   paths.push_back("///foo///");
66   paths.push_back("///foo///bar");
67   paths.push_back("/.");
68   paths.push_back("./");
69   paths.push_back("/..");
70   paths.push_back("../");
71   paths.push_back("foo/.");
72   paths.push_back("foo/..");
73   paths.push_back("foo/./");
74   paths.push_back("foo/./bar");
75   paths.push_back("foo/..");
76   paths.push_back("foo/../");
77   paths.push_back("foo/../bar");
78   paths.push_back("c:");
79   paths.push_back("c:/");
80   paths.push_back("c:foo");
81   paths.push_back("c:/foo");
82   paths.push_back("c:foo/");
83   paths.push_back("c:/foo/");
84   paths.push_back("c:/foo/bar");
85   paths.push_back("prn:");
86   paths.push_back("c:\\");
87   paths.push_back("c:foo");
88   paths.push_back("c:\\foo");
89   paths.push_back("c:foo\\");
90   paths.push_back("c:\\foo\\");
91   paths.push_back("c:\\foo/");
92   paths.push_back("c:/foo\\bar");
93 
94   SmallVector<StringRef, 5> ComponentStack;
95   for (SmallVector<StringRef, 40>::const_iterator i = paths.begin(),
96                                                   e = paths.end();
97                                                   i != e;
98                                                   ++i) {
99     for (sys::path::const_iterator ci = sys::path::begin(*i),
100                                    ce = sys::path::end(*i);
101                                    ci != ce;
102                                    ++ci) {
103       ASSERT_FALSE(ci->empty());
104       ComponentStack.push_back(*ci);
105     }
106 
107     for (sys::path::reverse_iterator ci = sys::path::rbegin(*i),
108                                      ce = sys::path::rend(*i);
109                                      ci != ce;
110                                      ++ci) {
111       ASSERT_TRUE(*ci == ComponentStack.back());
112       ComponentStack.pop_back();
113     }
114     ASSERT_TRUE(ComponentStack.empty());
115 
116     path::has_root_path(*i);
117     path::root_path(*i);
118     path::has_root_name(*i);
119     path::root_name(*i);
120     path::has_root_directory(*i);
121     path::root_directory(*i);
122     path::has_parent_path(*i);
123     path::parent_path(*i);
124     path::has_filename(*i);
125     path::filename(*i);
126     path::has_stem(*i);
127     path::stem(*i);
128     path::has_extension(*i);
129     path::extension(*i);
130     path::is_absolute(*i);
131     path::is_relative(*i);
132 
133     SmallString<128> temp_store;
134     temp_store = *i;
135     ASSERT_NO_ERROR(fs::make_absolute(temp_store));
136     temp_store = *i;
137     path::remove_filename(temp_store);
138 
139     temp_store = *i;
140     path::replace_extension(temp_store, "ext");
141     StringRef filename(temp_store.begin(), temp_store.size()), stem, ext;
142     stem = path::stem(filename);
143     ext  = path::extension(filename);
144     EXPECT_EQ(*sys::path::rbegin(filename), (stem + ext).str());
145 
146     path::native(*i, temp_store);
147   }
148 }
149 
150 TEST(Support, RelativePathIterator) {
151   SmallString<64> Path(StringRef("c/d/e/foo.txt"));
152   typedef SmallVector<StringRef, 4> PathComponents;
153   PathComponents ExpectedPathComponents;
154   PathComponents ActualPathComponents;
155 
156   StringRef(Path).split(ExpectedPathComponents, "/");
157 
158   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
159        ++I) {
160     ActualPathComponents.push_back(*I);
161   }
162 
163   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
164 
165   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
166     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
167   }
168 }
169 
170 TEST(Support, AbsolutePathIterator) {
171   SmallString<64> Path(StringRef("/c/d/e/foo.txt"));
172   typedef SmallVector<StringRef, 4> PathComponents;
173   PathComponents ExpectedPathComponents;
174   PathComponents ActualPathComponents;
175 
176   StringRef(Path).split(ExpectedPathComponents, "/");
177 
178   // The root path will also be a component when iterating
179   ExpectedPathComponents[0] = "/";
180 
181   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
182        ++I) {
183     ActualPathComponents.push_back(*I);
184   }
185 
186   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
187 
188   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
189     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
190   }
191 }
192 
193 #ifdef LLVM_ON_WIN32
194 TEST(Support, AbsolutePathIteratorWin32) {
195   SmallString<64> Path(StringRef("c:\\c\\e\\foo.txt"));
196   typedef SmallVector<StringRef, 4> PathComponents;
197   PathComponents ExpectedPathComponents;
198   PathComponents ActualPathComponents;
199 
200   StringRef(Path).split(ExpectedPathComponents, "\\");
201 
202   // The root path (which comes after the drive name) will also be a component
203   // when iterating.
204   ExpectedPathComponents.insert(ExpectedPathComponents.begin()+1, "\\");
205 
206   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
207        ++I) {
208     ActualPathComponents.push_back(*I);
209   }
210 
211   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
212 
213   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
214     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
215   }
216 }
217 #endif // LLVM_ON_WIN32
218 
219 TEST(Support, AbsolutePathIteratorEnd) {
220   // Trailing slashes are converted to '.' unless they are part of the root path.
221   SmallVector<StringRef, 4> Paths;
222   Paths.push_back("/foo/");
223   Paths.push_back("/foo//");
224   Paths.push_back("//net//");
225 #ifdef LLVM_ON_WIN32
226   Paths.push_back("c:\\\\");
227 #endif
228 
229   for (StringRef Path : Paths) {
230     StringRef LastComponent = *path::rbegin(Path);
231     EXPECT_EQ(".", LastComponent);
232   }
233 
234   SmallVector<StringRef, 3> RootPaths;
235   RootPaths.push_back("/");
236   RootPaths.push_back("//net/");
237 #ifdef LLVM_ON_WIN32
238   RootPaths.push_back("c:\\");
239 #endif
240 
241   for (StringRef Path : RootPaths) {
242     StringRef LastComponent = *path::rbegin(Path);
243     EXPECT_EQ(1u, LastComponent.size());
244     EXPECT_TRUE(path::is_separator(LastComponent[0]));
245   }
246 }
247 
248 TEST(Support, HomeDirectory) {
249 #ifdef LLVM_ON_UNIX
250   // This test only makes sense on Unix if $HOME is set.
251   if (::getenv("HOME")) {
252 #endif
253     SmallString<128> HomeDir;
254     EXPECT_TRUE(path::home_directory(HomeDir));
255     EXPECT_FALSE(HomeDir.empty());
256 #ifdef LLVM_ON_UNIX
257   }
258 #endif
259 }
260 
261 class FileSystemTest : public testing::Test {
262 protected:
263   /// Unique temporary directory in which all created filesystem entities must
264   /// be placed. It is recursively removed at the end of each test.
265   SmallString<128> TestDirectory;
266 
267   virtual void SetUp() {
268     ASSERT_NO_ERROR(
269         fs::createUniqueDirectory("file-system-test", TestDirectory));
270     // We don't care about this specific file.
271     errs() << "Test Directory: " << TestDirectory << '\n';
272     errs().flush();
273   }
274 
275   virtual void TearDown() {
276     ASSERT_NO_ERROR(fs::remove(TestDirectory.str()));
277   }
278 };
279 
280 TEST_F(FileSystemTest, Unique) {
281   // Create a temp file.
282   int FileDescriptor;
283   SmallString<64> TempPath;
284   ASSERT_NO_ERROR(
285       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
286 
287   // The same file should return an identical unique id.
288   fs::UniqueID F1, F2;
289   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), F1));
290   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), F2));
291   ASSERT_EQ(F1, F2);
292 
293   // Different files should return different unique ids.
294   int FileDescriptor2;
295   SmallString<64> TempPath2;
296   ASSERT_NO_ERROR(
297       fs::createTemporaryFile("prefix", "temp", FileDescriptor2, TempPath2));
298 
299   fs::UniqueID D;
300   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath2), D));
301   ASSERT_NE(D, F1);
302   ::close(FileDescriptor2);
303 
304   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
305 
306   // Two paths representing the same file on disk should still provide the
307   // same unique id.  We can test this by making a hard link.
308   ASSERT_NO_ERROR(fs::create_link(Twine(TempPath), Twine(TempPath2)));
309   fs::UniqueID D2;
310   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath2), D2));
311   ASSERT_EQ(D2, F1);
312 
313   ::close(FileDescriptor);
314 
315   SmallString<128> Dir1;
316   ASSERT_NO_ERROR(
317      fs::createUniqueDirectory("dir1", Dir1));
318   ASSERT_NO_ERROR(fs::getUniqueID(Dir1.c_str(), F1));
319   ASSERT_NO_ERROR(fs::getUniqueID(Dir1.c_str(), F2));
320   ASSERT_EQ(F1, F2);
321 
322   SmallString<128> Dir2;
323   ASSERT_NO_ERROR(
324      fs::createUniqueDirectory("dir2", Dir2));
325   ASSERT_NO_ERROR(fs::getUniqueID(Dir2.c_str(), F2));
326   ASSERT_NE(F1, F2);
327 }
328 
329 TEST_F(FileSystemTest, TempFiles) {
330   // Create a temp file.
331   int FileDescriptor;
332   SmallString<64> TempPath;
333   ASSERT_NO_ERROR(
334       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
335 
336   // Make sure it exists.
337   ASSERT_TRUE(sys::fs::exists(Twine(TempPath)));
338 
339   // Create another temp tile.
340   int FD2;
341   SmallString<64> TempPath2;
342   ASSERT_NO_ERROR(fs::createTemporaryFile("prefix", "temp", FD2, TempPath2));
343   ASSERT_TRUE(TempPath2.endswith(".temp"));
344   ASSERT_NE(TempPath.str(), TempPath2.str());
345 
346   fs::file_status A, B;
347   ASSERT_NO_ERROR(fs::status(Twine(TempPath), A));
348   ASSERT_NO_ERROR(fs::status(Twine(TempPath2), B));
349   EXPECT_FALSE(fs::equivalent(A, B));
350 
351   ::close(FD2);
352 
353   // Remove Temp2.
354   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
355   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
356   ASSERT_EQ(fs::remove(Twine(TempPath2), false),
357             errc::no_such_file_or_directory);
358 
359   std::error_code EC = fs::status(TempPath2.c_str(), B);
360   EXPECT_EQ(EC, errc::no_such_file_or_directory);
361   EXPECT_EQ(B.type(), fs::file_type::file_not_found);
362 
363   // Make sure Temp2 doesn't exist.
364   ASSERT_EQ(fs::access(Twine(TempPath2), sys::fs::AccessMode::Exist),
365             errc::no_such_file_or_directory);
366 
367   SmallString<64> TempPath3;
368   ASSERT_NO_ERROR(fs::createTemporaryFile("prefix", "", TempPath3));
369   ASSERT_FALSE(TempPath3.endswith("."));
370 
371   // Create a hard link to Temp1.
372   ASSERT_NO_ERROR(fs::create_link(Twine(TempPath), Twine(TempPath2)));
373   bool equal;
374   ASSERT_NO_ERROR(fs::equivalent(Twine(TempPath), Twine(TempPath2), equal));
375   EXPECT_TRUE(equal);
376   ASSERT_NO_ERROR(fs::status(Twine(TempPath), A));
377   ASSERT_NO_ERROR(fs::status(Twine(TempPath2), B));
378   EXPECT_TRUE(fs::equivalent(A, B));
379 
380   // Remove Temp1.
381   ::close(FileDescriptor);
382   ASSERT_NO_ERROR(fs::remove(Twine(TempPath)));
383 
384   // Remove the hard link.
385   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
386 
387   // Make sure Temp1 doesn't exist.
388   ASSERT_EQ(fs::access(Twine(TempPath), sys::fs::AccessMode::Exist),
389             errc::no_such_file_or_directory);
390 
391 #ifdef LLVM_ON_WIN32
392   // Path name > 260 chars should get an error.
393   const char *Path270 =
394     "abcdefghijklmnopqrstuvwxyz9abcdefghijklmnopqrstuvwxyz8"
395     "abcdefghijklmnopqrstuvwxyz7abcdefghijklmnopqrstuvwxyz6"
396     "abcdefghijklmnopqrstuvwxyz5abcdefghijklmnopqrstuvwxyz4"
397     "abcdefghijklmnopqrstuvwxyz3abcdefghijklmnopqrstuvwxyz2"
398     "abcdefghijklmnopqrstuvwxyz1abcdefghijklmnopqrstuvwxyz0";
399   EXPECT_EQ(fs::createUniqueFile(Twine(Path270), FileDescriptor, TempPath),
400             errc::no_such_file_or_directory);
401 #endif
402 }
403 
404 TEST_F(FileSystemTest, CreateDir) {
405   ASSERT_NO_ERROR(fs::create_directory(Twine(TestDirectory) + "foo"));
406   ASSERT_NO_ERROR(fs::create_directory(Twine(TestDirectory) + "foo"));
407   ASSERT_EQ(fs::create_directory(Twine(TestDirectory) + "foo", false),
408             errc::file_exists);
409   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "foo"));
410 }
411 
412 TEST_F(FileSystemTest, DirectoryIteration) {
413   std::error_code ec;
414   for (fs::directory_iterator i(".", ec), e; i != e; i.increment(ec))
415     ASSERT_NO_ERROR(ec);
416 
417   // Create a known hierarchy to recurse over.
418   ASSERT_NO_ERROR(
419       fs::create_directories(Twine(TestDirectory) + "/recursive/a0/aa1"));
420   ASSERT_NO_ERROR(
421       fs::create_directories(Twine(TestDirectory) + "/recursive/a0/ab1"));
422   ASSERT_NO_ERROR(fs::create_directories(Twine(TestDirectory) +
423                                          "/recursive/dontlookhere/da1"));
424   ASSERT_NO_ERROR(
425       fs::create_directories(Twine(TestDirectory) + "/recursive/z0/za1"));
426   ASSERT_NO_ERROR(
427       fs::create_directories(Twine(TestDirectory) + "/recursive/pop/p1"));
428   typedef std::vector<std::string> v_t;
429   v_t visited;
430   for (fs::recursive_directory_iterator i(Twine(TestDirectory)
431          + "/recursive", ec), e; i != e; i.increment(ec)){
432     ASSERT_NO_ERROR(ec);
433     if (path::filename(i->path()) == "p1") {
434       i.pop();
435       // FIXME: recursive_directory_iterator should be more robust.
436       if (i == e) break;
437     }
438     if (path::filename(i->path()) == "dontlookhere")
439       i.no_push();
440     visited.push_back(path::filename(i->path()));
441   }
442   v_t::const_iterator a0 = std::find(visited.begin(), visited.end(), "a0");
443   v_t::const_iterator aa1 = std::find(visited.begin(), visited.end(), "aa1");
444   v_t::const_iterator ab1 = std::find(visited.begin(), visited.end(), "ab1");
445   v_t::const_iterator dontlookhere = std::find(visited.begin(), visited.end(),
446                                                "dontlookhere");
447   v_t::const_iterator da1 = std::find(visited.begin(), visited.end(), "da1");
448   v_t::const_iterator z0 = std::find(visited.begin(), visited.end(), "z0");
449   v_t::const_iterator za1 = std::find(visited.begin(), visited.end(), "za1");
450   v_t::const_iterator pop = std::find(visited.begin(), visited.end(), "pop");
451   v_t::const_iterator p1 = std::find(visited.begin(), visited.end(), "p1");
452 
453   // Make sure that each path was visited correctly.
454   ASSERT_NE(a0, visited.end());
455   ASSERT_NE(aa1, visited.end());
456   ASSERT_NE(ab1, visited.end());
457   ASSERT_NE(dontlookhere, visited.end());
458   ASSERT_EQ(da1, visited.end()); // Not visited.
459   ASSERT_NE(z0, visited.end());
460   ASSERT_NE(za1, visited.end());
461   ASSERT_NE(pop, visited.end());
462   ASSERT_EQ(p1, visited.end()); // Not visited.
463 
464   // Make sure that parents were visited before children. No other ordering
465   // guarantees can be made across siblings.
466   ASSERT_LT(a0, aa1);
467   ASSERT_LT(a0, ab1);
468   ASSERT_LT(z0, za1);
469 
470   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/a0/aa1"));
471   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/a0/ab1"));
472   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/a0"));
473   ASSERT_NO_ERROR(
474       fs::remove(Twine(TestDirectory) + "/recursive/dontlookhere/da1"));
475   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/dontlookhere"));
476   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/pop/p1"));
477   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/pop"));
478   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/z0/za1"));
479   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/z0"));
480   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive"));
481 }
482 
483 const char archive[] = "!<arch>\x0A";
484 const char bitcode[] = "\xde\xc0\x17\x0b";
485 const char coff_object[] = "\x00\x00......";
486 const char coff_bigobj[] = "\x00\x00\xff\xff\x00\x02......"
487     "\xc7\xa1\xba\xd1\xee\xba\xa9\x4b\xaf\x20\xfa\xf6\x6a\xa4\xdc\xb8";
488 const char coff_import_library[] = "\x00\x00\xff\xff....";
489 const char elf_relocatable[] = { 0x7f, 'E', 'L', 'F', 1, 2, 1, 0, 0,
490                                  0,    0,   0,   0,   0, 0, 0, 0, 1 };
491 const char macho_universal_binary[] = "\xca\xfe\xba\xbe...\0x00";
492 const char macho_object[] = "\xfe\xed\xfa\xce..........\x00\x01";
493 const char macho_executable[] = "\xfe\xed\xfa\xce..........\x00\x02";
494 const char macho_fixed_virtual_memory_shared_lib[] =
495     "\xfe\xed\xfa\xce..........\x00\x03";
496 const char macho_core[] = "\xfe\xed\xfa\xce..........\x00\x04";
497 const char macho_preload_executable[] = "\xfe\xed\xfa\xce..........\x00\x05";
498 const char macho_dynamically_linked_shared_lib[] =
499     "\xfe\xed\xfa\xce..........\x00\x06";
500 const char macho_dynamic_linker[] = "\xfe\xed\xfa\xce..........\x00\x07";
501 const char macho_bundle[] = "\xfe\xed\xfa\xce..........\x00\x08";
502 const char macho_dsym_companion[] = "\xfe\xed\xfa\xce..........\x00\x0a";
503 const char windows_resource[] = "\x00\x00\x00\x00\x020\x00\x00\x00\xff";
504 const char macho_dynamically_linked_shared_lib_stub[] =
505     "\xfe\xed\xfa\xce..........\x00\x09";
506 
507 TEST_F(FileSystemTest, Magic) {
508   struct type {
509     const char *filename;
510     const char *magic_str;
511     size_t magic_str_len;
512     fs::file_magic magic;
513   } types[] = {
514 #define DEFINE(magic)                                           \
515     { #magic, magic, sizeof(magic), fs::file_magic::magic }
516     DEFINE(archive),
517     DEFINE(bitcode),
518     DEFINE(coff_object),
519     { "coff_bigobj", coff_bigobj, sizeof(coff_bigobj), fs::file_magic::coff_object },
520     DEFINE(coff_import_library),
521     DEFINE(elf_relocatable),
522     DEFINE(macho_universal_binary),
523     DEFINE(macho_object),
524     DEFINE(macho_executable),
525     DEFINE(macho_fixed_virtual_memory_shared_lib),
526     DEFINE(macho_core),
527     DEFINE(macho_preload_executable),
528     DEFINE(macho_dynamically_linked_shared_lib),
529     DEFINE(macho_dynamic_linker),
530     DEFINE(macho_bundle),
531     DEFINE(macho_dynamically_linked_shared_lib_stub),
532     DEFINE(macho_dsym_companion),
533     DEFINE(windows_resource)
534 #undef DEFINE
535     };
536 
537   // Create some files filled with magic.
538   for (type *i = types, *e = types + (sizeof(types) / sizeof(type)); i != e;
539                                                                      ++i) {
540     SmallString<128> file_pathname(TestDirectory);
541     path::append(file_pathname, i->filename);
542     std::error_code EC;
543     raw_fd_ostream file(file_pathname, EC, sys::fs::F_None);
544     ASSERT_FALSE(file.has_error());
545     StringRef magic(i->magic_str, i->magic_str_len);
546     file << magic;
547     file.close();
548     EXPECT_EQ(i->magic, fs::identify_magic(magic));
549     ASSERT_NO_ERROR(fs::remove(Twine(file_pathname)));
550   }
551 }
552 
553 #ifdef LLVM_ON_WIN32
554 TEST_F(FileSystemTest, CarriageReturn) {
555   SmallString<128> FilePathname(TestDirectory);
556   std::error_code EC;
557   path::append(FilePathname, "test");
558 
559   {
560     raw_fd_ostream File(FilePathname, EC, sys::fs::F_Text);
561     ASSERT_NO_ERROR(EC);
562     File << '\n';
563   }
564   {
565     auto Buf = MemoryBuffer::getFile(FilePathname.str());
566     EXPECT_TRUE((bool)Buf);
567     EXPECT_EQ(Buf.get()->getBuffer(), "\r\n");
568   }
569 
570   {
571     raw_fd_ostream File(FilePathname, EC, sys::fs::F_None);
572     ASSERT_NO_ERROR(EC);
573     File << '\n';
574   }
575   {
576     auto Buf = MemoryBuffer::getFile(FilePathname.str());
577     EXPECT_TRUE((bool)Buf);
578     EXPECT_EQ(Buf.get()->getBuffer(), "\n");
579   }
580   ASSERT_NO_ERROR(fs::remove(Twine(FilePathname)));
581 }
582 #endif
583 
584 TEST_F(FileSystemTest, FileMapping) {
585   // Create a temp file.
586   int FileDescriptor;
587   SmallString<64> TempPath;
588   ASSERT_NO_ERROR(
589       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
590   // Map in temp file and add some content
591   std::error_code EC;
592   StringRef Val("hello there");
593   {
594     fs::mapped_file_region mfr(FileDescriptor,
595                                true,
596                                fs::mapped_file_region::readwrite,
597                                4096,
598                                0,
599                                EC);
600     ASSERT_NO_ERROR(EC);
601     std::copy(Val.begin(), Val.end(), mfr.data());
602     // Explicitly add a 0.
603     mfr.data()[Val.size()] = 0;
604     // Unmap temp file
605   }
606 
607   // Map it back in read-only
608   fs::mapped_file_region mfr(Twine(TempPath),
609                              fs::mapped_file_region::readonly,
610                              0,
611                              0,
612                              EC);
613   ASSERT_NO_ERROR(EC);
614 
615   // Verify content
616   EXPECT_EQ(StringRef(mfr.const_data()), Val);
617 
618   // Unmap temp file
619 
620   fs::mapped_file_region m(Twine(TempPath),
621                              fs::mapped_file_region::readonly,
622                              0,
623                              0,
624                              EC);
625   ASSERT_NO_ERROR(EC);
626   const char *Data = m.const_data();
627   fs::mapped_file_region mfrrv(std::move(m));
628   EXPECT_EQ(mfrrv.const_data(), Data);
629 }
630 
631 TEST(Support, NormalizePath) {
632 #if defined(LLVM_ON_WIN32)
633 #define EXPECT_PATH_IS(path__, windows__, not_windows__)                        \
634   EXPECT_EQ(path__, windows__);
635 #else
636 #define EXPECT_PATH_IS(path__, windows__, not_windows__)                        \
637   EXPECT_EQ(path__, not_windows__);
638 #endif
639 
640   SmallString<64> Path1("a");
641   SmallString<64> Path2("a/b");
642   SmallString<64> Path3("a\\b");
643   SmallString<64> Path4("a\\\\b");
644   SmallString<64> Path5("\\a");
645   SmallString<64> Path6("a\\");
646 
647   path::native(Path1);
648   EXPECT_PATH_IS(Path1, "a", "a");
649 
650   path::native(Path2);
651   EXPECT_PATH_IS(Path2, "a\\b", "a/b");
652 
653   path::native(Path3);
654   EXPECT_PATH_IS(Path3, "a\\b", "a/b");
655 
656   path::native(Path4);
657   EXPECT_PATH_IS(Path4, "a\\\\b", "a\\\\b");
658 
659   path::native(Path5);
660   EXPECT_PATH_IS(Path5, "\\a", "/a");
661 
662   path::native(Path6);
663   EXPECT_PATH_IS(Path6, "a\\", "a/");
664 
665 #undef EXPECT_PATH_IS
666 }
667 } // anonymous namespace
668