1 //===- llvm/unittest/Support/Path.cpp - Path tests ------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "llvm/Support/Path.h"
11 #include "llvm/Support/Errc.h"
12 #include "llvm/Support/ErrorHandling.h"
13 #include "llvm/Support/FileSystem.h"
14 #include "llvm/Support/MemoryBuffer.h"
15 #include "llvm/Support/raw_ostream.h"
16 #include "gtest/gtest.h"
17 
18 #ifdef LLVM_ON_WIN32
19 #include <Windows.h>
20 #include <winerror.h>
21 #endif
22 
23 using namespace llvm;
24 using namespace llvm::sys;
25 
26 #define ASSERT_NO_ERROR(x)                                                     \
27   if (std::error_code ASSERT_NO_ERROR_ec = x) {                                \
28     SmallString<128> MessageStorage;                                           \
29     raw_svector_ostream Message(MessageStorage);                               \
30     Message << #x ": did not return errc::success.\n"                          \
31             << "error number: " << ASSERT_NO_ERROR_ec.value() << "\n"          \
32             << "error message: " << ASSERT_NO_ERROR_ec.message() << "\n";      \
33     GTEST_FATAL_FAILURE_(MessageStorage.c_str());                              \
34   } else {                                                                     \
35   }
36 
37 namespace {
38 
39 TEST(is_separator, Works) {
40   EXPECT_TRUE(path::is_separator('/'));
41   EXPECT_FALSE(path::is_separator('\0'));
42   EXPECT_FALSE(path::is_separator('-'));
43   EXPECT_FALSE(path::is_separator(' '));
44 
45 #ifdef LLVM_ON_WIN32
46   EXPECT_TRUE(path::is_separator('\\'));
47 #else
48   EXPECT_FALSE(path::is_separator('\\'));
49 #endif
50 }
51 
52 TEST(Support, Path) {
53   SmallVector<StringRef, 40> paths;
54   paths.push_back("");
55   paths.push_back(".");
56   paths.push_back("..");
57   paths.push_back("foo");
58   paths.push_back("/");
59   paths.push_back("/foo");
60   paths.push_back("foo/");
61   paths.push_back("/foo/");
62   paths.push_back("foo/bar");
63   paths.push_back("/foo/bar");
64   paths.push_back("//net");
65   paths.push_back("//net/foo");
66   paths.push_back("///foo///");
67   paths.push_back("///foo///bar");
68   paths.push_back("/.");
69   paths.push_back("./");
70   paths.push_back("/..");
71   paths.push_back("../");
72   paths.push_back("foo/.");
73   paths.push_back("foo/..");
74   paths.push_back("foo/./");
75   paths.push_back("foo/./bar");
76   paths.push_back("foo/..");
77   paths.push_back("foo/../");
78   paths.push_back("foo/../bar");
79   paths.push_back("c:");
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/bar");
86   paths.push_back("prn:");
87   paths.push_back("c:\\");
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/");
93   paths.push_back("c:/foo\\bar");
94 
95   SmallVector<StringRef, 5> ComponentStack;
96   for (SmallVector<StringRef, 40>::const_iterator i = paths.begin(),
97                                                   e = paths.end();
98                                                   i != e;
99                                                   ++i) {
100     for (sys::path::const_iterator ci = sys::path::begin(*i),
101                                    ce = sys::path::end(*i);
102                                    ci != ce;
103                                    ++ci) {
104       ASSERT_FALSE(ci->empty());
105       ComponentStack.push_back(*ci);
106     }
107 
108     for (sys::path::reverse_iterator ci = sys::path::rbegin(*i),
109                                      ce = sys::path::rend(*i);
110                                      ci != ce;
111                                      ++ci) {
112       ASSERT_TRUE(*ci == ComponentStack.back());
113       ComponentStack.pop_back();
114     }
115     ASSERT_TRUE(ComponentStack.empty());
116 
117     path::has_root_path(*i);
118     path::root_path(*i);
119     path::has_root_name(*i);
120     path::root_name(*i);
121     path::has_root_directory(*i);
122     path::root_directory(*i);
123     path::has_parent_path(*i);
124     path::parent_path(*i);
125     path::has_filename(*i);
126     path::filename(*i);
127     path::has_stem(*i);
128     path::stem(*i);
129     path::has_extension(*i);
130     path::extension(*i);
131     path::is_absolute(*i);
132     path::is_relative(*i);
133 
134     SmallString<128> temp_store;
135     temp_store = *i;
136     ASSERT_NO_ERROR(fs::make_absolute(temp_store));
137     temp_store = *i;
138     path::remove_filename(temp_store);
139 
140     temp_store = *i;
141     path::replace_extension(temp_store, "ext");
142     StringRef filename(temp_store.begin(), temp_store.size()), stem, ext;
143     stem = path::stem(filename);
144     ext  = path::extension(filename);
145     EXPECT_EQ(*sys::path::rbegin(filename), (stem + ext).str());
146 
147     path::native(*i, temp_store);
148   }
149 }
150 
151 TEST(Support, RelativePathIterator) {
152   SmallString<64> Path(StringRef("c/d/e/foo.txt"));
153   typedef SmallVector<StringRef, 4> PathComponents;
154   PathComponents ExpectedPathComponents;
155   PathComponents ActualPathComponents;
156 
157   StringRef(Path).split(ExpectedPathComponents, "/");
158 
159   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
160        ++I) {
161     ActualPathComponents.push_back(*I);
162   }
163 
164   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
165 
166   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
167     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
168   }
169 }
170 
171 TEST(Support, AbsolutePathIterator) {
172   SmallString<64> Path(StringRef("/c/d/e/foo.txt"));
173   typedef SmallVector<StringRef, 4> PathComponents;
174   PathComponents ExpectedPathComponents;
175   PathComponents ActualPathComponents;
176 
177   StringRef(Path).split(ExpectedPathComponents, "/");
178 
179   // The root path will also be a component when iterating
180   ExpectedPathComponents[0] = "/";
181 
182   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
183        ++I) {
184     ActualPathComponents.push_back(*I);
185   }
186 
187   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
188 
189   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
190     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
191   }
192 }
193 
194 #ifdef LLVM_ON_WIN32
195 TEST(Support, AbsolutePathIteratorWin32) {
196   SmallString<64> Path(StringRef("c:\\c\\e\\foo.txt"));
197   typedef SmallVector<StringRef, 4> PathComponents;
198   PathComponents ExpectedPathComponents;
199   PathComponents ActualPathComponents;
200 
201   StringRef(Path).split(ExpectedPathComponents, "\\");
202 
203   // The root path (which comes after the drive name) will also be a component
204   // when iterating.
205   ExpectedPathComponents.insert(ExpectedPathComponents.begin()+1, "\\");
206 
207   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
208        ++I) {
209     ActualPathComponents.push_back(*I);
210   }
211 
212   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
213 
214   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
215     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
216   }
217 }
218 #endif // LLVM_ON_WIN32
219 
220 TEST(Support, AbsolutePathIteratorEnd) {
221   // Trailing slashes are converted to '.' unless they are part of the root path.
222   SmallVector<StringRef, 4> Paths;
223   Paths.push_back("/foo/");
224   Paths.push_back("/foo//");
225   Paths.push_back("//net//");
226 #ifdef LLVM_ON_WIN32
227   Paths.push_back("c:\\\\");
228 #endif
229 
230   for (StringRef Path : Paths) {
231     StringRef LastComponent = *path::rbegin(Path);
232     EXPECT_EQ(".", LastComponent);
233   }
234 
235   SmallVector<StringRef, 3> RootPaths;
236   RootPaths.push_back("/");
237   RootPaths.push_back("//net/");
238 #ifdef LLVM_ON_WIN32
239   RootPaths.push_back("c:\\");
240 #endif
241 
242   for (StringRef Path : RootPaths) {
243     StringRef LastComponent = *path::rbegin(Path);
244     EXPECT_EQ(1u, LastComponent.size());
245     EXPECT_TRUE(path::is_separator(LastComponent[0]));
246   }
247 }
248 
249 TEST(Support, HomeDirectory) {
250 #ifdef LLVM_ON_UNIX
251   // This test only makes sense on Unix if $HOME is set.
252   if (::getenv("HOME")) {
253 #endif
254     SmallString<128> HomeDir;
255     EXPECT_TRUE(path::home_directory(HomeDir));
256     EXPECT_FALSE(HomeDir.empty());
257 #ifdef LLVM_ON_UNIX
258   }
259 #endif
260 }
261 
262 class FileSystemTest : public testing::Test {
263 protected:
264   /// Unique temporary directory in which all created filesystem entities must
265   /// be placed. It is removed at the end of each test (must be empty).
266   SmallString<128> TestDirectory;
267 
268   virtual void SetUp() {
269     ASSERT_NO_ERROR(
270         fs::createUniqueDirectory("file-system-test", TestDirectory));
271     // We don't care about this specific file.
272     errs() << "Test Directory: " << TestDirectory << '\n';
273     errs().flush();
274   }
275 
276   virtual void TearDown() {
277     ASSERT_NO_ERROR(fs::remove(TestDirectory.str()));
278   }
279 };
280 
281 TEST_F(FileSystemTest, Unique) {
282   // Create a temp file.
283   int FileDescriptor;
284   SmallString<64> TempPath;
285   ASSERT_NO_ERROR(
286       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
287 
288   // The same file should return an identical unique id.
289   fs::UniqueID F1, F2;
290   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), F1));
291   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), F2));
292   ASSERT_EQ(F1, F2);
293 
294   // Different files should return different unique ids.
295   int FileDescriptor2;
296   SmallString<64> TempPath2;
297   ASSERT_NO_ERROR(
298       fs::createTemporaryFile("prefix", "temp", FileDescriptor2, TempPath2));
299 
300   fs::UniqueID D;
301   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath2), D));
302   ASSERT_NE(D, F1);
303   ::close(FileDescriptor2);
304 
305   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
306 
307   // Two paths representing the same file on disk should still provide the
308   // same unique id.  We can test this by making a hard link.
309   ASSERT_NO_ERROR(fs::create_link(Twine(TempPath), Twine(TempPath2)));
310   fs::UniqueID D2;
311   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath2), D2));
312   ASSERT_EQ(D2, F1);
313 
314   ::close(FileDescriptor);
315 
316   SmallString<128> Dir1;
317   ASSERT_NO_ERROR(
318      fs::createUniqueDirectory("dir1", Dir1));
319   ASSERT_NO_ERROR(fs::getUniqueID(Dir1.c_str(), F1));
320   ASSERT_NO_ERROR(fs::getUniqueID(Dir1.c_str(), F2));
321   ASSERT_EQ(F1, F2);
322 
323   SmallString<128> Dir2;
324   ASSERT_NO_ERROR(
325      fs::createUniqueDirectory("dir2", Dir2));
326   ASSERT_NO_ERROR(fs::getUniqueID(Dir2.c_str(), F2));
327   ASSERT_NE(F1, F2);
328 }
329 
330 TEST_F(FileSystemTest, TempFiles) {
331   // Create a temp file.
332   int FileDescriptor;
333   SmallString<64> TempPath;
334   ASSERT_NO_ERROR(
335       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
336 
337   // Make sure it exists.
338   ASSERT_TRUE(sys::fs::exists(Twine(TempPath)));
339 
340   // Create another temp tile.
341   int FD2;
342   SmallString<64> TempPath2;
343   ASSERT_NO_ERROR(fs::createTemporaryFile("prefix", "temp", FD2, TempPath2));
344   ASSERT_TRUE(TempPath2.endswith(".temp"));
345   ASSERT_NE(TempPath.str(), TempPath2.str());
346 
347   fs::file_status A, B;
348   ASSERT_NO_ERROR(fs::status(Twine(TempPath), A));
349   ASSERT_NO_ERROR(fs::status(Twine(TempPath2), B));
350   EXPECT_FALSE(fs::equivalent(A, B));
351 
352   ::close(FD2);
353 
354   // Remove Temp2.
355   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
356   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
357   ASSERT_EQ(fs::remove(Twine(TempPath2), false),
358             errc::no_such_file_or_directory);
359 
360   std::error_code EC = fs::status(TempPath2.c_str(), B);
361   EXPECT_EQ(EC, errc::no_such_file_or_directory);
362   EXPECT_EQ(B.type(), fs::file_type::file_not_found);
363 
364   // Make sure Temp2 doesn't exist.
365   ASSERT_EQ(fs::access(Twine(TempPath2), sys::fs::AccessMode::Exist),
366             errc::no_such_file_or_directory);
367 
368   SmallString<64> TempPath3;
369   ASSERT_NO_ERROR(fs::createTemporaryFile("prefix", "", TempPath3));
370   ASSERT_FALSE(TempPath3.endswith("."));
371 
372   // Create a hard link to Temp1.
373   ASSERT_NO_ERROR(fs::create_link(Twine(TempPath), Twine(TempPath2)));
374   bool equal;
375   ASSERT_NO_ERROR(fs::equivalent(Twine(TempPath), Twine(TempPath2), equal));
376   EXPECT_TRUE(equal);
377   ASSERT_NO_ERROR(fs::status(Twine(TempPath), A));
378   ASSERT_NO_ERROR(fs::status(Twine(TempPath2), B));
379   EXPECT_TRUE(fs::equivalent(A, B));
380 
381   // Remove Temp1.
382   ::close(FileDescriptor);
383   ASSERT_NO_ERROR(fs::remove(Twine(TempPath)));
384 
385   // Remove the hard link.
386   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
387 
388   // Make sure Temp1 doesn't exist.
389   ASSERT_EQ(fs::access(Twine(TempPath), sys::fs::AccessMode::Exist),
390             errc::no_such_file_or_directory);
391 
392 #ifdef LLVM_ON_WIN32
393   // Path name > 260 chars should get an error.
394   const char *Path270 =
395     "abcdefghijklmnopqrstuvwxyz9abcdefghijklmnopqrstuvwxyz8"
396     "abcdefghijklmnopqrstuvwxyz7abcdefghijklmnopqrstuvwxyz6"
397     "abcdefghijklmnopqrstuvwxyz5abcdefghijklmnopqrstuvwxyz4"
398     "abcdefghijklmnopqrstuvwxyz3abcdefghijklmnopqrstuvwxyz2"
399     "abcdefghijklmnopqrstuvwxyz1abcdefghijklmnopqrstuvwxyz0";
400   EXPECT_EQ(fs::createUniqueFile(Path270, FileDescriptor, TempPath),
401             errc::invalid_argument);
402   // Relative path < 247 chars, no problem.
403   const char *Path216 =
404     "abcdefghijklmnopqrstuvwxyz7abcdefghijklmnopqrstuvwxyz6"
405     "abcdefghijklmnopqrstuvwxyz5abcdefghijklmnopqrstuvwxyz4"
406     "abcdefghijklmnopqrstuvwxyz3abcdefghijklmnopqrstuvwxyz2"
407     "abcdefghijklmnopqrstuvwxyz1abcdefghijklmnopqrstuvwxyz0";
408   ASSERT_NO_ERROR(fs::createTemporaryFile(Path216, "", TempPath));
409   ASSERT_NO_ERROR(fs::remove(Twine(TempPath)));
410 #endif
411 }
412 
413 TEST_F(FileSystemTest, CreateDir) {
414   ASSERT_NO_ERROR(fs::create_directory(Twine(TestDirectory) + "foo"));
415   ASSERT_NO_ERROR(fs::create_directory(Twine(TestDirectory) + "foo"));
416   ASSERT_EQ(fs::create_directory(Twine(TestDirectory) + "foo", false),
417             errc::file_exists);
418   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "foo"));
419 
420 #ifdef LLVM_ON_WIN32
421   // Prove that create_directories() can handle a pathname > 248 characters,
422   // which is the documented limit for CreateDirectory().
423   // (248 is MAX_PATH subtracting room for an 8.3 filename.)
424   // Generate a directory path guaranteed to fall into that range.
425   size_t TmpLen = TestDirectory.size();
426   const char *OneDir = "\\123456789";
427   size_t OneDirLen = strlen(OneDir);
428   ASSERT_LT(OneDirLen, 12U);
429   size_t NLevels = ((248 - TmpLen) / OneDirLen) + 1;
430   SmallString<260> LongDir(TestDirectory);
431   for (size_t I = 0; I < NLevels; ++I)
432     LongDir.append(OneDir);
433   ASSERT_NO_ERROR(fs::create_directories(Twine(LongDir)));
434   ASSERT_NO_ERROR(fs::create_directories(Twine(LongDir)));
435   ASSERT_EQ(fs::create_directories(Twine(LongDir), false),
436             errc::file_exists);
437   // Tidy up, "recursively" removing the directories.
438   StringRef ThisDir(LongDir);
439   for (size_t J = 0; J < NLevels; ++J) {
440     ASSERT_NO_ERROR(fs::remove(ThisDir));
441     ThisDir = path::parent_path(ThisDir);
442   }
443 
444   // Similarly for a relative pathname.  Need to set the current directory to
445   // TestDirectory so that the one we create ends up in the right place.
446   char PreviousDir[260];
447   size_t PreviousDirLen = ::GetCurrentDirectoryA(260, PreviousDir);
448   ASSERT_GT(PreviousDirLen, 0U);
449   ASSERT_LT(PreviousDirLen, 260U);
450   ASSERT_NE(::SetCurrentDirectoryA(TestDirectory.c_str()), 0);
451   LongDir.clear();
452   // Generate a relative directory name with absolute length > 248.
453   size_t LongDirLen = 249 - TestDirectory.size();
454   LongDir.assign(LongDirLen, 'a');
455   ASSERT_NO_ERROR(fs::create_directory(Twine(LongDir)));
456   // While we're here, prove that .. and . handling works in these long paths.
457   const char *DotDotDirs = "\\..\\.\\b";
458   LongDir.append(DotDotDirs);
459   ASSERT_NO_ERROR(fs::create_directory("b"));
460   ASSERT_EQ(fs::create_directory(Twine(LongDir), false), errc::file_exists);
461   // And clean up.
462   ASSERT_NO_ERROR(fs::remove("b"));
463   ASSERT_NO_ERROR(fs::remove(
464     Twine(LongDir.substr(0, LongDir.size() - strlen(DotDotDirs)))));
465   ASSERT_NE(::SetCurrentDirectoryA(PreviousDir), 0);
466 #endif
467 }
468 
469 TEST_F(FileSystemTest, DirectoryIteration) {
470   std::error_code ec;
471   for (fs::directory_iterator i(".", ec), e; i != e; i.increment(ec))
472     ASSERT_NO_ERROR(ec);
473 
474   // Create a known hierarchy to recurse over.
475   ASSERT_NO_ERROR(
476       fs::create_directories(Twine(TestDirectory) + "/recursive/a0/aa1"));
477   ASSERT_NO_ERROR(
478       fs::create_directories(Twine(TestDirectory) + "/recursive/a0/ab1"));
479   ASSERT_NO_ERROR(fs::create_directories(Twine(TestDirectory) +
480                                          "/recursive/dontlookhere/da1"));
481   ASSERT_NO_ERROR(
482       fs::create_directories(Twine(TestDirectory) + "/recursive/z0/za1"));
483   ASSERT_NO_ERROR(
484       fs::create_directories(Twine(TestDirectory) + "/recursive/pop/p1"));
485   typedef std::vector<std::string> v_t;
486   v_t visited;
487   for (fs::recursive_directory_iterator i(Twine(TestDirectory)
488          + "/recursive", ec), e; i != e; i.increment(ec)){
489     ASSERT_NO_ERROR(ec);
490     if (path::filename(i->path()) == "p1") {
491       i.pop();
492       // FIXME: recursive_directory_iterator should be more robust.
493       if (i == e) break;
494     }
495     if (path::filename(i->path()) == "dontlookhere")
496       i.no_push();
497     visited.push_back(path::filename(i->path()));
498   }
499   v_t::const_iterator a0 = std::find(visited.begin(), visited.end(), "a0");
500   v_t::const_iterator aa1 = std::find(visited.begin(), visited.end(), "aa1");
501   v_t::const_iterator ab1 = std::find(visited.begin(), visited.end(), "ab1");
502   v_t::const_iterator dontlookhere = std::find(visited.begin(), visited.end(),
503                                                "dontlookhere");
504   v_t::const_iterator da1 = std::find(visited.begin(), visited.end(), "da1");
505   v_t::const_iterator z0 = std::find(visited.begin(), visited.end(), "z0");
506   v_t::const_iterator za1 = std::find(visited.begin(), visited.end(), "za1");
507   v_t::const_iterator pop = std::find(visited.begin(), visited.end(), "pop");
508   v_t::const_iterator p1 = std::find(visited.begin(), visited.end(), "p1");
509 
510   // Make sure that each path was visited correctly.
511   ASSERT_NE(a0, visited.end());
512   ASSERT_NE(aa1, visited.end());
513   ASSERT_NE(ab1, visited.end());
514   ASSERT_NE(dontlookhere, visited.end());
515   ASSERT_EQ(da1, visited.end()); // Not visited.
516   ASSERT_NE(z0, visited.end());
517   ASSERT_NE(za1, visited.end());
518   ASSERT_NE(pop, visited.end());
519   ASSERT_EQ(p1, visited.end()); // Not visited.
520 
521   // Make sure that parents were visited before children. No other ordering
522   // guarantees can be made across siblings.
523   ASSERT_LT(a0, aa1);
524   ASSERT_LT(a0, ab1);
525   ASSERT_LT(z0, za1);
526 
527   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/a0/aa1"));
528   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/a0/ab1"));
529   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/a0"));
530   ASSERT_NO_ERROR(
531       fs::remove(Twine(TestDirectory) + "/recursive/dontlookhere/da1"));
532   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/dontlookhere"));
533   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/pop/p1"));
534   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/pop"));
535   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/z0/za1"));
536   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/z0"));
537   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive"));
538 }
539 
540 const char archive[] = "!<arch>\x0A";
541 const char bitcode[] = "\xde\xc0\x17\x0b";
542 const char coff_object[] = "\x00\x00......";
543 const char coff_bigobj[] = "\x00\x00\xff\xff\x00\x02......"
544     "\xc7\xa1\xba\xd1\xee\xba\xa9\x4b\xaf\x20\xfa\xf6\x6a\xa4\xdc\xb8";
545 const char coff_import_library[] = "\x00\x00\xff\xff....";
546 const char elf_relocatable[] = { 0x7f, 'E', 'L', 'F', 1, 2, 1, 0, 0,
547                                  0,    0,   0,   0,   0, 0, 0, 0, 1 };
548 const char macho_universal_binary[] = "\xca\xfe\xba\xbe...\0x00";
549 const char macho_object[] = "\xfe\xed\xfa\xce..........\x00\x01";
550 const char macho_executable[] = "\xfe\xed\xfa\xce..........\x00\x02";
551 const char macho_fixed_virtual_memory_shared_lib[] =
552     "\xfe\xed\xfa\xce..........\x00\x03";
553 const char macho_core[] = "\xfe\xed\xfa\xce..........\x00\x04";
554 const char macho_preload_executable[] = "\xfe\xed\xfa\xce..........\x00\x05";
555 const char macho_dynamically_linked_shared_lib[] =
556     "\xfe\xed\xfa\xce..........\x00\x06";
557 const char macho_dynamic_linker[] = "\xfe\xed\xfa\xce..........\x00\x07";
558 const char macho_bundle[] = "\xfe\xed\xfa\xce..........\x00\x08";
559 const char macho_dsym_companion[] = "\xfe\xed\xfa\xce..........\x00\x0a";
560 const char windows_resource[] = "\x00\x00\x00\x00\x020\x00\x00\x00\xff";
561 const char macho_dynamically_linked_shared_lib_stub[] =
562     "\xfe\xed\xfa\xce..........\x00\x09";
563 
564 TEST_F(FileSystemTest, Magic) {
565   struct type {
566     const char *filename;
567     const char *magic_str;
568     size_t magic_str_len;
569     fs::file_magic magic;
570   } types[] = {
571 #define DEFINE(magic)                                           \
572     { #magic, magic, sizeof(magic), fs::file_magic::magic }
573     DEFINE(archive),
574     DEFINE(bitcode),
575     DEFINE(coff_object),
576     { "coff_bigobj", coff_bigobj, sizeof(coff_bigobj), fs::file_magic::coff_object },
577     DEFINE(coff_import_library),
578     DEFINE(elf_relocatable),
579     DEFINE(macho_universal_binary),
580     DEFINE(macho_object),
581     DEFINE(macho_executable),
582     DEFINE(macho_fixed_virtual_memory_shared_lib),
583     DEFINE(macho_core),
584     DEFINE(macho_preload_executable),
585     DEFINE(macho_dynamically_linked_shared_lib),
586     DEFINE(macho_dynamic_linker),
587     DEFINE(macho_bundle),
588     DEFINE(macho_dynamically_linked_shared_lib_stub),
589     DEFINE(macho_dsym_companion),
590     DEFINE(windows_resource)
591 #undef DEFINE
592     };
593 
594   // Create some files filled with magic.
595   for (type *i = types, *e = types + (sizeof(types) / sizeof(type)); i != e;
596                                                                      ++i) {
597     SmallString<128> file_pathname(TestDirectory);
598     path::append(file_pathname, i->filename);
599     std::error_code EC;
600     raw_fd_ostream file(file_pathname, EC, sys::fs::F_None);
601     ASSERT_FALSE(file.has_error());
602     StringRef magic(i->magic_str, i->magic_str_len);
603     file << magic;
604     file.close();
605     EXPECT_EQ(i->magic, fs::identify_magic(magic));
606     ASSERT_NO_ERROR(fs::remove(Twine(file_pathname)));
607   }
608 }
609 
610 #ifdef LLVM_ON_WIN32
611 TEST_F(FileSystemTest, CarriageReturn) {
612   SmallString<128> FilePathname(TestDirectory);
613   std::error_code EC;
614   path::append(FilePathname, "test");
615 
616   {
617     raw_fd_ostream File(FilePathname, EC, sys::fs::F_Text);
618     ASSERT_NO_ERROR(EC);
619     File << '\n';
620   }
621   {
622     auto Buf = MemoryBuffer::getFile(FilePathname.str());
623     EXPECT_TRUE((bool)Buf);
624     EXPECT_EQ(Buf.get()->getBuffer(), "\r\n");
625   }
626 
627   {
628     raw_fd_ostream File(FilePathname, EC, sys::fs::F_None);
629     ASSERT_NO_ERROR(EC);
630     File << '\n';
631   }
632   {
633     auto Buf = MemoryBuffer::getFile(FilePathname.str());
634     EXPECT_TRUE((bool)Buf);
635     EXPECT_EQ(Buf.get()->getBuffer(), "\n");
636   }
637   ASSERT_NO_ERROR(fs::remove(Twine(FilePathname)));
638 }
639 #endif
640 
641 TEST_F(FileSystemTest, Resize) {
642   int FD;
643   SmallString<64> TempPath;
644   ASSERT_NO_ERROR(fs::createTemporaryFile("prefix", "temp", FD, TempPath));
645   ASSERT_NO_ERROR(fs::resize_file(FD, 123));
646   fs::file_status Status;
647   ASSERT_NO_ERROR(fs::status(FD, Status));
648   ASSERT_EQ(Status.getSize(), 123U);
649 }
650 
651 TEST_F(FileSystemTest, FileMapping) {
652   // Create a temp file.
653   int FileDescriptor;
654   SmallString<64> TempPath;
655   ASSERT_NO_ERROR(
656       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
657   unsigned Size = 4096;
658   ASSERT_NO_ERROR(fs::resize_file(FileDescriptor, Size));
659 
660   // Map in temp file and add some content
661   std::error_code EC;
662   StringRef Val("hello there");
663   {
664     fs::mapped_file_region mfr(FileDescriptor,
665                                fs::mapped_file_region::readwrite, Size, 0, EC);
666     ASSERT_NO_ERROR(EC);
667     std::copy(Val.begin(), Val.end(), mfr.data());
668     // Explicitly add a 0.
669     mfr.data()[Val.size()] = 0;
670     // Unmap temp file
671   }
672 
673   // Map it back in read-only
674   int FD;
675   EC = fs::openFileForRead(Twine(TempPath), FD);
676   ASSERT_NO_ERROR(EC);
677   fs::mapped_file_region mfr(FD, fs::mapped_file_region::readonly, Size, 0, EC);
678   ASSERT_NO_ERROR(EC);
679 
680   // Verify content
681   EXPECT_EQ(StringRef(mfr.const_data()), Val);
682 
683   // Unmap temp file
684   fs::mapped_file_region m(FD, fs::mapped_file_region::readonly, Size, 0, EC);
685   ASSERT_NO_ERROR(EC);
686   ASSERT_EQ(close(FD), 0);
687 }
688 
689 TEST(Support, NormalizePath) {
690 #if defined(LLVM_ON_WIN32)
691 #define EXPECT_PATH_IS(path__, windows__, not_windows__)                        \
692   EXPECT_EQ(path__, windows__);
693 #else
694 #define EXPECT_PATH_IS(path__, windows__, not_windows__)                        \
695   EXPECT_EQ(path__, not_windows__);
696 #endif
697 
698   SmallString<64> Path1("a");
699   SmallString<64> Path2("a/b");
700   SmallString<64> Path3("a\\b");
701   SmallString<64> Path4("a\\\\b");
702   SmallString<64> Path5("\\a");
703   SmallString<64> Path6("a\\");
704 
705   path::native(Path1);
706   EXPECT_PATH_IS(Path1, "a", "a");
707 
708   path::native(Path2);
709   EXPECT_PATH_IS(Path2, "a\\b", "a/b");
710 
711   path::native(Path3);
712   EXPECT_PATH_IS(Path3, "a\\b", "a/b");
713 
714   path::native(Path4);
715   EXPECT_PATH_IS(Path4, "a\\\\b", "a\\\\b");
716 
717   path::native(Path5);
718   EXPECT_PATH_IS(Path5, "\\a", "/a");
719 
720   path::native(Path6);
721   EXPECT_PATH_IS(Path6, "a\\", "a/");
722 
723 #undef EXPECT_PATH_IS
724 }
725 } // anonymous namespace
726