1//===- llvm/unittest/Support/FileOutputBuffer.cpp - unit 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/Errc.h"
11#include "llvm/Support/ErrorHandling.h"
12#include "llvm/Support/FileOutputBuffer.h"
13#include "llvm/Support/FileSystem.h"
14#include "llvm/Support/Path.h"
15#include "llvm/Support/raw_ostream.h"
16#include "gtest/gtest.h"
17
18using namespace llvm;
19using namespace llvm::sys;
20
21#define ASSERT_NO_ERROR(x)                                                     \
22  if (std::error_code ASSERT_NO_ERROR_ec = x) {                                \
23    errs() << #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  } else {                                                                     \
27  }
28
29namespace {
30TEST(FileOutputBuffer, Test) {
31  // Create unique temporary directory for these tests
32  SmallString<128> TestDirectory;
33  {
34    ASSERT_NO_ERROR(
35        fs::createUniqueDirectory("FileOutputBuffer-test", TestDirectory));
36  }
37
38  // TEST 1: Verify commit case.
39  SmallString<128> File1(TestDirectory);
40	File1.append("/file1");
41  {
42    std::unique_ptr<FileOutputBuffer> Buffer;
43    ASSERT_NO_ERROR(FileOutputBuffer::create(File1, 8192, Buffer));
44    // Start buffer with special header.
45    memcpy(Buffer->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);
46    // Write to end of buffer to verify it is writable.
47    memcpy(Buffer->getBufferEnd() - 20, "AABBCCDDEEFFGGHHIIJJ", 20);
48    // Commit buffer.
49    ASSERT_NO_ERROR(Buffer->commit());
50  }
51
52  // Verify file is correct size.
53  uint64_t File1Size;
54  ASSERT_NO_ERROR(fs::file_size(Twine(File1), File1Size));
55  ASSERT_EQ(File1Size, 8192ULL);
56  ASSERT_NO_ERROR(fs::remove(File1.str()));
57
58 	// TEST 2: Verify abort case.
59  SmallString<128> File2(TestDirectory);
60	File2.append("/file2");
61  {
62    std::unique_ptr<FileOutputBuffer> Buffer2;
63    ASSERT_NO_ERROR(FileOutputBuffer::create(File2, 8192, Buffer2));
64    // Fill buffer with special header.
65    memcpy(Buffer2->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);
66    // Do *not* commit buffer.
67  }
68  // Verify file does not exist (because buffer not committed).
69  ASSERT_EQ(fs::access(Twine(File2), fs::AccessMode::Exist),
70            errc::no_such_file_or_directory);
71  ASSERT_NO_ERROR(fs::remove(File2.str()));
72
73  // TEST 3: Verify sizing down case.
74  SmallString<128> File3(TestDirectory);
75	File3.append("/file3");
76  {
77    std::unique_ptr<FileOutputBuffer> Buffer;
78    ASSERT_NO_ERROR(FileOutputBuffer::create(File3, 8192000, Buffer));
79    // Start buffer with special header.
80    memcpy(Buffer->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);
81    // Write to end of buffer to verify it is writable.
82    memcpy(Buffer->getBufferEnd() - 20, "AABBCCDDEEFFGGHHIIJJ", 20);
83    ASSERT_NO_ERROR(Buffer->commit());
84  }
85
86  // Verify file is correct size.
87  uint64_t File3Size;
88  ASSERT_NO_ERROR(fs::file_size(Twine(File3), File3Size));
89  ASSERT_EQ(File3Size, 8192000ULL);
90  ASSERT_NO_ERROR(fs::remove(File3.str()));
91
92  // TEST 4: Verify file can be made executable.
93  SmallString<128> File4(TestDirectory);
94	File4.append("/file4");
95  {
96    std::unique_ptr<FileOutputBuffer> Buffer;
97    ASSERT_NO_ERROR(FileOutputBuffer::create(File4, 8192, Buffer,
98                                              FileOutputBuffer::F_executable));
99    // Start buffer with special header.
100    memcpy(Buffer->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);
101    // Commit buffer.
102    ASSERT_NO_ERROR(Buffer->commit());
103  }
104  // Verify file exists and is executable.
105  fs::file_status Status;
106  ASSERT_NO_ERROR(fs::status(Twine(File4), Status));
107  bool IsExecutable = (Status.permissions() & fs::owner_exe);
108  EXPECT_TRUE(IsExecutable);
109  ASSERT_NO_ERROR(fs::remove(File4.str()));
110
111  // Clean up.
112  ASSERT_NO_ERROR(fs::remove(TestDirectory.str()));
113}
114} // anonymous namespace
115