src/llvm/unittests/Support/FileOutputBufferTest.cpp

   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/ADT/OwningPtr.h"
  11 #include "llvm/Support/ErrorHandling.h"
  12 #include "llvm/Support/FileOutputBuffer.h"
  13 #include "llvm/Support/FileSystem.h"
  14 #include "llvm/Support/PathV2.h"
  15 #include "llvm/Support/raw_ostream.h"
  16
  17 #include "gtest/gtest.h"
  18
  19 using namespace llvm;
  20 using namespace llvm::sys;
  21
  22 #define ASSERT_NO_ERROR(x) \
  23   if (error_code ASSERT_NO_ERROR_ec = x) { \
  24     errs() << #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   } else {}
  28
  29 namespace {
  30
  31
  32 // NOTE: Temporarily run this test on unix only.  Once the file mapping
  33 // routines are ported to Windows, this conditional can be removed.
  34 #if LLVM_ON_UNIX
  35
  36
  37 TEST(FileOutputBuffer, Test) {
  38   // Create unique temporary directory for these tests
  39   SmallString<128> TestDirectory;
  40   {
  41     int fd;
  42     ASSERT_NO_ERROR(
  43       fs::unique_file("FileOutputBuffer-test-%%-%%-%%-%%/dir", fd,
  44                       TestDirectory));
  45     ::close(fd);
  46     TestDirectory = path::parent_path(TestDirectory);
  47   }
  48
  49   // TEST 1: Verify commit case.
  50   SmallString<128> File1(TestDirectory);
  51         File1.append("/file1");
  52   {
  53     OwningPtr<FileOutputBuffer> Buffer;
  54     ASSERT_NO_ERROR(FileOutputBuffer::create(File1, 8192, Buffer));
  55     // Start buffer with special header.
  56     memcpy(Buffer->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);
  57     // Write to end of buffer to verify it is writable.
  58     memcpy(Buffer->getBufferEnd() - 20, "AABBCCDDEEFFGGHHIIJJ", 20);
  59     // Commit buffer.
  60     ASSERT_NO_ERROR(Buffer->commit());
  61   }
  62   // Verify file exists and starts with special header.
  63   bool MagicMatches = false;
  64   ASSERT_NO_ERROR(fs::has_magic(Twine(File1), Twine("AABBCCDDEEFFGGHHIIJJ"),
  65                                                                 MagicMatches));
  66   EXPECT_TRUE(MagicMatches);
  67   // Verify file is correct size.
  68   uint64_t File1Size;
  69   ASSERT_NO_ERROR(fs::file_size(Twine(File1), File1Size));
  70   ASSERT_EQ(File1Size, 8192ULL);
  71
  72         // TEST 2: Verify abort case.
  73   SmallString<128> File2(TestDirectory);
  74         File2.append("/file2");
  75   {
  76     OwningPtr<FileOutputBuffer> Buffer2;
  77     ASSERT_NO_ERROR(FileOutputBuffer::create(File2, 8192, Buffer2));
  78     // Fill buffer with special header.
  79     memcpy(Buffer2->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);
  80     // Do *not* commit buffer.
  81   }
  82   // Verify file does not exist (because buffer not commited).
  83   bool Exists = false;
  84   ASSERT_NO_ERROR(fs::exists(Twine(File2), Exists));
  85   EXPECT_FALSE(Exists);
  86
  87
  88   // TEST 3: Verify sizing down case.
  89   SmallString<128> File3(TestDirectory);
  90         File3.append("/file3");
  91   {
  92     OwningPtr<FileOutputBuffer> Buffer;
  93     ASSERT_NO_ERROR(FileOutputBuffer::create(File3, 8192000, Buffer));
  94     // Start buffer with special header.
  95     memcpy(Buffer->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);
  96     // Write to end of buffer to verify it is writable.
  97     memcpy(Buffer->getBufferEnd() - 20, "AABBCCDDEEFFGGHHIIJJ", 20);
  98     // Commit buffer, but size down to smaller size
  99     ASSERT_NO_ERROR(Buffer->commit(5000));
 100   }
 101   // Verify file exists and starts with special header.
 102   bool MagicMatches3 = false;
 103   ASSERT_NO_ERROR(fs::has_magic(Twine(File3), Twine("AABBCCDDEEFFGGHHIIJJ"),
 104                                                               MagicMatches3));
 105   EXPECT_TRUE(MagicMatches3);
 106   // Verify file is correct size.
 107   uint64_t File3Size;
 108   ASSERT_NO_ERROR(fs::file_size(Twine(File3), File3Size));
 109   ASSERT_EQ(File3Size, 5000ULL);
 110
 111
 112   // TEST 4: Verify file can be made executable.
 113   SmallString<128> File4(TestDirectory);
 114         File4.append("/file4");
 115   {
 116     OwningPtr<FileOutputBuffer> Buffer;
 117     ASSERT_NO_ERROR(FileOutputBuffer::create(File4, 8192, Buffer,
 118                                               FileOutputBuffer::F_executable));
 119     // Start buffer with special header.
 120     memcpy(Buffer->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);
 121     // Commit buffer.
 122     ASSERT_NO_ERROR(Buffer->commit());
 123   }
 124   // Verify file exists and is executable.
 125   fs::file_status Status;
 126   ASSERT_NO_ERROR(fs::status(Twine(File4), Status));
 127   bool IsExecutable = (Status.permissions() & fs::owner_exe);
 128   EXPECT_TRUE(IsExecutable);
 129
 130   // Clean up.
 131   uint32_t RemovedCount;
 132   ASSERT_NO_ERROR(fs::remove_all(TestDirectory.str(), RemovedCount));
 133 }
 134
 135 #endif // LLVM_ON_UNIX
 136
 137 } // anonymous namespace