Path.cpp revision 1cce797d32aa465c054fc4a313d8c330c89bd862 
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/raw_ostream.h"
14#include "gtest/gtest.h"
15
16using namespace llvm;
17using namespace llvm::sys;
18
19#define ASSERT_NO_ERROR(x) \
20  if (error_code ASSERT_NO_ERROR_ec = x) { \
21    SmallString<128> MessageStorage; \
22    raw_svector_ostream Message(MessageStorage); \
23    Message << #x ": did not return errc::success.\n" \
24            << "error number: " << ASSERT_NO_ERROR_ec.value() << "\n" \
25            << "error message: " << ASSERT_NO_ERROR_ec.message() << "\n"; \
26    GTEST_FATAL_FAILURE_(MessageStorage.c_str()); \
27  } else {}
28
29namespace {
30
31TEST(is_separator, Works) {
32  EXPECT_TRUE(path::is_separator('/'));
33  EXPECT_FALSE(path::is_separator('\0'));
34  EXPECT_FALSE(path::is_separator('-'));
35  EXPECT_FALSE(path::is_separator(' '));
36
37#ifdef LLVM_ON_WIN32
38  EXPECT_TRUE(path::is_separator('\\'));
39#else
40  EXPECT_FALSE(path::is_separator('\\'));
41#endif
42}
43
44TEST(Support, Path) {
45  SmallVector<StringRef, 40> paths;
46  paths.push_back("");
47  paths.push_back(".");
48  paths.push_back("..");
49  paths.push_back("foo");
50  paths.push_back("/");
51  paths.push_back("/foo");
52  paths.push_back("foo/");
53  paths.push_back("/foo/");
54  paths.push_back("foo/bar");
55  paths.push_back("/foo/bar");
56  paths.push_back("//net");
57  paths.push_back("//net/foo");
58  paths.push_back("///foo///");
59  paths.push_back("///foo///bar");
60  paths.push_back("/.");
61  paths.push_back("./");
62  paths.push_back("/..");
63  paths.push_back("../");
64  paths.push_back("foo/.");
65  paths.push_back("foo/..");
66  paths.push_back("foo/./");
67  paths.push_back("foo/./bar");
68  paths.push_back("foo/..");
69  paths.push_back("foo/../");
70  paths.push_back("foo/../bar");
71  paths.push_back("c:");
72  paths.push_back("c:/");
73  paths.push_back("c:foo");
74  paths.push_back("c:/foo");
75  paths.push_back("c:foo/");
76  paths.push_back("c:/foo/");
77  paths.push_back("c:/foo/bar");
78  paths.push_back("prn:");
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/");
85  paths.push_back("c:/foo\\bar");
86
87  for (SmallVector<StringRef, 40>::const_iterator i = paths.begin(),
88                                                  e = paths.end();
89                                                  i != e;
90                                                  ++i) {
91    for (sys::path::const_iterator ci = sys::path::begin(*i),
92                                   ce = sys::path::end(*i);
93                                   ci != ce;
94                                   ++ci) {
95      ASSERT_FALSE(ci->empty());
96    }
97
98#if 0 // Valgrind is whining about this.
99    outs() << "    Reverse Iteration: [";
100    for (sys::path::reverse_iterator ci = sys::path::rbegin(*i),
101                                     ce = sys::path::rend(*i);
102                                     ci != ce;
103                                     ++ci) {
104      outs() << *ci << ',';
105    }
106    outs() << "]\n";
107#endif
108
109    path::has_root_path(*i);
110    path::root_path(*i);
111    path::has_root_name(*i);
112    path::root_name(*i);
113    path::has_root_directory(*i);
114    path::root_directory(*i);
115    path::has_parent_path(*i);
116    path::parent_path(*i);
117    path::has_filename(*i);
118    path::filename(*i);
119    path::has_stem(*i);
120    path::stem(*i);
121    path::has_extension(*i);
122    path::extension(*i);
123    path::is_absolute(*i);
124    path::is_relative(*i);
125
126    SmallString<128> temp_store;
127    temp_store = *i;
128    ASSERT_NO_ERROR(fs::make_absolute(temp_store));
129    temp_store = *i;
130    path::remove_filename(temp_store);
131
132    temp_store = *i;
133    path::replace_extension(temp_store, "ext");
134    StringRef filename(temp_store.begin(), temp_store.size()), stem, ext;
135    stem = path::stem(filename);
136    ext  = path::extension(filename);
137    EXPECT_EQ(*(--sys::path::end(filename)), (stem + ext).str());
138
139    path::native(*i, temp_store);
140  }
141}
142
143class FileSystemTest : public testing::Test {
144protected:
145  /// Unique temporary directory in which all created filesystem entities must
146  /// be placed. It is recursively removed at the end of each test.
147  SmallString<128> TestDirectory;
148
149  virtual void SetUp() {
150    ASSERT_NO_ERROR(
151        fs::createUniqueDirectory("file-system-test", TestDirectory));
152    // We don't care about this specific file.
153    errs() << "Test Directory: " << TestDirectory << '\n';
154    errs().flush();
155  }
156
157  virtual void TearDown() {
158    uint32_t removed;
159    ASSERT_NO_ERROR(fs::remove_all(TestDirectory.str(), removed));
160  }
161};
162
163TEST_F(FileSystemTest, Unique) {
164  // Create a temp file.
165  int FileDescriptor;
166  SmallString<64> TempPath;
167  ASSERT_NO_ERROR(
168      fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
169
170  // The same file should return an identical unique id.
171  uint64_t F1, F2;
172  ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), F1));
173  ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), F2));
174  ASSERT_EQ(F1, F2);
175
176  // Different files should return different unique ids.
177  int FileDescriptor2;
178  SmallString<64> TempPath2;
179  ASSERT_NO_ERROR(
180      fs::createTemporaryFile("prefix", "temp", FileDescriptor2, TempPath2));
181
182  uint64_t D;
183  ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath2), D));
184  ASSERT_NE(D, F1);
185  ::close(FileDescriptor2);
186
187  ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
188
189  // Two paths representing the same file on disk should still provide the
190  // same unique id.  We can test this by making a hard link.
191  ASSERT_NO_ERROR(fs::create_hard_link(Twine(TempPath), Twine(TempPath2)));
192  uint64_t D2;
193  ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath2), D2));
194  ASSERT_EQ(D2, F1);
195
196  ::close(FileDescriptor);
197}
198
199TEST_F(FileSystemTest, TempFiles) {
200  // Create a temp file.
201  int FileDescriptor;
202  SmallString<64> TempPath;
203  ASSERT_NO_ERROR(
204      fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
205
206  // Make sure it exists.
207  bool TempFileExists;
208  ASSERT_NO_ERROR(sys::fs::exists(Twine(TempPath), TempFileExists));
209  EXPECT_TRUE(TempFileExists);
210
211  // Create another temp tile.
212  int FD2;
213  SmallString<64> TempPath2;
214  ASSERT_NO_ERROR(fs::createTemporaryFile("prefix", "temp", FD2, TempPath2));
215  ASSERT_NE(TempPath.str(), TempPath2.str());
216
217  fs::file_status A, B;
218  ASSERT_NO_ERROR(fs::status(Twine(TempPath), A));
219  ASSERT_NO_ERROR(fs::status(Twine(TempPath2), B));
220  EXPECT_FALSE(fs::equivalent(A, B));
221
222  // Try to copy the first to the second.
223  EXPECT_EQ(
224    fs::copy_file(Twine(TempPath), Twine(TempPath2)), errc::file_exists);
225
226  ::close(FD2);
227  // Try again with the proper options.
228  ASSERT_NO_ERROR(fs::copy_file(Twine(TempPath), Twine(TempPath2),
229                                fs::copy_option::overwrite_if_exists));
230  // Remove Temp2.
231  ASSERT_NO_ERROR(fs::remove(Twine(TempPath2), TempFileExists));
232  EXPECT_TRUE(TempFileExists);
233
234  // Make sure Temp2 doesn't exist.
235  ASSERT_NO_ERROR(fs::exists(Twine(TempPath2), TempFileExists));
236  EXPECT_FALSE(TempFileExists);
237
238  // Create a hard link to Temp1.
239  ASSERT_NO_ERROR(fs::create_hard_link(Twine(TempPath), Twine(TempPath2)));
240  bool equal;
241  ASSERT_NO_ERROR(fs::equivalent(Twine(TempPath), Twine(TempPath2), equal));
242  EXPECT_TRUE(equal);
243  ASSERT_NO_ERROR(fs::status(Twine(TempPath), A));
244  ASSERT_NO_ERROR(fs::status(Twine(TempPath2), B));
245  EXPECT_TRUE(fs::equivalent(A, B));
246
247  // Remove Temp1.
248  ::close(FileDescriptor);
249  ASSERT_NO_ERROR(fs::remove(Twine(TempPath), TempFileExists));
250  EXPECT_TRUE(TempFileExists);
251
252  // Remove the hard link.
253  ASSERT_NO_ERROR(fs::remove(Twine(TempPath2), TempFileExists));
254  EXPECT_TRUE(TempFileExists);
255
256  // Make sure Temp1 doesn't exist.
257  ASSERT_NO_ERROR(fs::exists(Twine(TempPath), TempFileExists));
258  EXPECT_FALSE(TempFileExists);
259
260#ifdef LLVM_ON_WIN32
261  // Path name > 260 chars should get an error.
262  const char *Path270 =
263    "abcdefghijklmnopqrstuvwxyz9abcdefghijklmnopqrstuvwxyz8"
264    "abcdefghijklmnopqrstuvwxyz7abcdefghijklmnopqrstuvwxyz6"
265    "abcdefghijklmnopqrstuvwxyz5abcdefghijklmnopqrstuvwxyz4"
266    "abcdefghijklmnopqrstuvwxyz3abcdefghijklmnopqrstuvwxyz2"
267    "abcdefghijklmnopqrstuvwxyz1abcdefghijklmnopqrstuvwxyz0";
268  EXPECT_EQ(fs::createUniqueFile(Twine(Path270), FileDescriptor, TempPath),
269            windows_error::path_not_found);
270#endif
271}
272
273TEST_F(FileSystemTest, DirectoryIteration) {
274  error_code ec;
275  for (fs::directory_iterator i(".", ec), e; i != e; i.increment(ec))
276    ASSERT_NO_ERROR(ec);
277
278  // Create a known hierarchy to recurse over.
279  bool existed;
280  ASSERT_NO_ERROR(fs::create_directories(Twine(TestDirectory)
281                  + "/recursive/a0/aa1", existed));
282  ASSERT_NO_ERROR(fs::create_directories(Twine(TestDirectory)
283                  + "/recursive/a0/ab1", existed));
284  ASSERT_NO_ERROR(fs::create_directories(Twine(TestDirectory)
285                  + "/recursive/dontlookhere/da1", existed));
286  ASSERT_NO_ERROR(fs::create_directories(Twine(TestDirectory)
287                  + "/recursive/z0/za1", existed));
288  ASSERT_NO_ERROR(fs::create_directories(Twine(TestDirectory)
289                  + "/recursive/pop/p1", existed));
290  typedef std::vector<std::string> v_t;
291  v_t visited;
292  for (fs::recursive_directory_iterator i(Twine(TestDirectory)
293         + "/recursive", ec), e; i != e; i.increment(ec)){
294    ASSERT_NO_ERROR(ec);
295    if (path::filename(i->path()) == "p1") {
296      i.pop();
297      // FIXME: recursive_directory_iterator should be more robust.
298      if (i == e) break;
299    }
300    if (path::filename(i->path()) == "dontlookhere")
301      i.no_push();
302    visited.push_back(path::filename(i->path()));
303  }
304  v_t::const_iterator a0 = std::find(visited.begin(), visited.end(), "a0");
305  v_t::const_iterator aa1 = std::find(visited.begin(), visited.end(), "aa1");
306  v_t::const_iterator ab1 = std::find(visited.begin(), visited.end(), "ab1");
307  v_t::const_iterator dontlookhere = std::find(visited.begin(), visited.end(),
308                                               "dontlookhere");
309  v_t::const_iterator da1 = std::find(visited.begin(), visited.end(), "da1");
310  v_t::const_iterator z0 = std::find(visited.begin(), visited.end(), "z0");
311  v_t::const_iterator za1 = std::find(visited.begin(), visited.end(), "za1");
312  v_t::const_iterator pop = std::find(visited.begin(), visited.end(), "pop");
313  v_t::const_iterator p1 = std::find(visited.begin(), visited.end(), "p1");
314
315  // Make sure that each path was visited correctly.
316  ASSERT_NE(a0, visited.end());
317  ASSERT_NE(aa1, visited.end());
318  ASSERT_NE(ab1, visited.end());
319  ASSERT_NE(dontlookhere, visited.end());
320  ASSERT_EQ(da1, visited.end()); // Not visited.
321  ASSERT_NE(z0, visited.end());
322  ASSERT_NE(za1, visited.end());
323  ASSERT_NE(pop, visited.end());
324  ASSERT_EQ(p1, visited.end()); // Not visited.
325
326  // Make sure that parents were visited before children. No other ordering
327  // guarantees can be made across siblings.
328  ASSERT_LT(a0, aa1);
329  ASSERT_LT(a0, ab1);
330  ASSERT_LT(z0, za1);
331}
332
333const char elf[] = {0x7f, 'E', 'L', 'F', 1, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1};
334
335TEST_F(FileSystemTest, Magic) {
336  struct type {
337    const char *filename;
338    const char *magic_str;
339    size_t magic_str_len;
340    fs::file_magic magic;
341  } types [] = {
342    {"magic.archive", "!<arch>\x0A", 8, fs::file_magic::archive},
343    {"magic.elf", elf, sizeof(elf),
344     fs::file_magic::elf_relocatable}
345  };
346
347  // Create some files filled with magic.
348  for (type *i = types, *e = types + (sizeof(types) / sizeof(type)); i != e;
349                                                                     ++i) {
350    SmallString<128> file_pathname(TestDirectory);
351    path::append(file_pathname, i->filename);
352    std::string ErrMsg;
353    raw_fd_ostream file(file_pathname.c_str(), ErrMsg,
354                        raw_fd_ostream::F_Binary);
355    ASSERT_FALSE(file.has_error());
356    StringRef magic(i->magic_str, i->magic_str_len);
357    file << magic;
358    file.close();
359    bool res = false;
360    ASSERT_NO_ERROR(fs::has_magic(file_pathname.c_str(), magic, res));
361    EXPECT_TRUE(res);
362    EXPECT_EQ(i->magic, fs::identify_magic(magic));
363  }
364}
365
366TEST_F(FileSystemTest, FileMapping) {
367  // Create a temp file.
368  int FileDescriptor;
369  SmallString<64> TempPath;
370  ASSERT_NO_ERROR(
371      fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
372  // Map in temp file and add some content
373  error_code EC;
374  StringRef Val("hello there");
375  {
376    fs::mapped_file_region mfr(FileDescriptor,
377                               true,
378                               fs::mapped_file_region::readwrite,
379                               4096,
380                               0,
381                               EC);
382    ASSERT_NO_ERROR(EC);
383    std::copy(Val.begin(), Val.end(), mfr.data());
384    // Explicitly add a 0.
385    mfr.data()[Val.size()] = 0;
386    // Unmap temp file
387  }
388
389  // Map it back in read-only
390  fs::mapped_file_region mfr(Twine(TempPath),
391                             fs::mapped_file_region::readonly,
392                             0,
393                             0,
394                             EC);
395  ASSERT_NO_ERROR(EC);
396
397  // Verify content
398  EXPECT_EQ(StringRef(mfr.const_data()), Val);
399
400  // Unmap temp file
401
402#if LLVM_HAS_RVALUE_REFERENCES
403  fs::mapped_file_region m(Twine(TempPath),
404                             fs::mapped_file_region::readonly,
405                             0,
406                             0,
407                             EC);
408  ASSERT_NO_ERROR(EC);
409  const char *Data = m.const_data();
410  fs::mapped_file_region mfrrv(llvm_move(m));
411  EXPECT_EQ(mfrrv.const_data(), Data);
412#endif
413}
414} // anonymous namespace
415