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1//===- llvm/unittest/Support/FileOutputBuffer.cpp - unit tests ------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "llvm/Support/FileOutputBuffer.h"10#include "llvm/Support/Errc.h"11#include "llvm/Support/ErrorHandling.h"12#include "llvm/Support/FileSystem.h"13#include "llvm/Support/MemoryBuffer.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    SmallString<128> MessageStorage;                                           \24    raw_svector_ostream Message(MessageStorage);                               \25    Message << #x ": did not return errc::success.\n"                          \26            << "error number: " << ASSERT_NO_ERROR_ec.value() << "\n"          \27            << "error message: " << ASSERT_NO_ERROR_ec.message() << "\n";      \28    GTEST_FATAL_FAILURE_(MessageStorage.c_str());                              \29  } else {                                                                     \30  }31 32namespace {33TEST(FileOutputBuffer, Test) {34  // Create unique temporary directory for these tests35  SmallString<128> TestDirectory;36  {37    ASSERT_NO_ERROR(38        fs::createUniqueDirectory("FileOutputBuffer-test", TestDirectory));39  }40 41  // TEST 1: Verify commit case.42  SmallString<128> File1(TestDirectory);43  File1.append("/file1");44  {45    Expected<std::unique_ptr<FileOutputBuffer>> BufferOrErr =46        FileOutputBuffer::create(File1, 8192);47    ASSERT_NO_ERROR(errorToErrorCode(BufferOrErr.takeError()));48    std::unique_ptr<FileOutputBuffer> &Buffer = *BufferOrErr;49    // Start buffer with special header.50    memcpy(Buffer->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);51    // Write to end of buffer to verify it is writable.52    memcpy(Buffer->getBufferEnd() - 20, "AABBCCDDEEFFGGHHIIJJ", 20);53    // Commit buffer.54    ASSERT_NO_ERROR(errorToErrorCode(Buffer->commit()));55  }56 57  // Verify file is correct size.58  uint64_t File1Size;59  ASSERT_NO_ERROR(fs::file_size(Twine(File1), File1Size));60  ASSERT_EQ(File1Size, 8192ULL);61  ASSERT_NO_ERROR(fs::remove(File1.str()));62 63  // TEST 2: Verify abort case.64  SmallString<128> File2(TestDirectory);65  File2.append("/file2");66  {67    Expected<std::unique_ptr<FileOutputBuffer>> Buffer2OrErr =68        FileOutputBuffer::create(File2, 8192);69    ASSERT_NO_ERROR(errorToErrorCode(Buffer2OrErr.takeError()));70    std::unique_ptr<FileOutputBuffer> &Buffer2 = *Buffer2OrErr;71    // Fill buffer with special header.72    memcpy(Buffer2->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);73    // Do *not* commit buffer.74  }75  // Verify file does not exist (because buffer not committed).76  ASSERT_EQ(fs::access(Twine(File2), fs::AccessMode::Exist),77            errc::no_such_file_or_directory);78  ASSERT_NO_ERROR(fs::remove(File2.str()));79 80  // TEST 3: Verify sizing down case.81  SmallString<128> File3(TestDirectory);82  File3.append("/file3");83  {84    Expected<std::unique_ptr<FileOutputBuffer>> BufferOrErr =85        FileOutputBuffer::create(File3, 8192000);86    ASSERT_NO_ERROR(errorToErrorCode(BufferOrErr.takeError()));87    std::unique_ptr<FileOutputBuffer> &Buffer = *BufferOrErr;88    // Start buffer with special header.89    memcpy(Buffer->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);90    // Write to end of buffer to verify it is writable.91    memcpy(Buffer->getBufferEnd() - 20, "AABBCCDDEEFFGGHHIIJJ", 20);92    ASSERT_NO_ERROR(errorToErrorCode(Buffer->commit()));93  }94 95  // Verify file is correct size.96  uint64_t File3Size;97  ASSERT_NO_ERROR(fs::file_size(Twine(File3), File3Size));98  ASSERT_EQ(File3Size, 8192000ULL);99  ASSERT_NO_ERROR(fs::remove(File3.str()));100 101  // TEST 4: Verify file can be made executable.102  SmallString<128> File4(TestDirectory);103  File4.append("/file4");104  {105    Expected<std::unique_ptr<FileOutputBuffer>> BufferOrErr =106        FileOutputBuffer::create(File4, 8192, FileOutputBuffer::F_executable);107    ASSERT_NO_ERROR(errorToErrorCode(BufferOrErr.takeError()));108    std::unique_ptr<FileOutputBuffer> &Buffer = *BufferOrErr;109    // Start buffer with special header.110    memcpy(Buffer->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);111    // Commit buffer.112    ASSERT_NO_ERROR(errorToErrorCode(Buffer->commit()));113  }114  // Verify file exists and is executable.115  fs::file_status Status;116  ASSERT_NO_ERROR(fs::status(Twine(File4), Status));117  bool IsExecutable = (Status.permissions() & fs::owner_exe);118  EXPECT_TRUE(IsExecutable);119  ASSERT_NO_ERROR(fs::remove(File4.str()));120 121  // TEST 5: In-memory buffer works as expected.122  SmallString<128> File5(TestDirectory);123  File5.append("/file5");124  {125    Expected<std::unique_ptr<FileOutputBuffer>> BufferOrErr =126        FileOutputBuffer::create(File5, 8000, FileOutputBuffer::F_mmap);127    ASSERT_NO_ERROR(errorToErrorCode(BufferOrErr.takeError()));128    std::unique_ptr<FileOutputBuffer> &Buffer = *BufferOrErr;129    // Start buffer with special header.130    memcpy(Buffer->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);131    ASSERT_NO_ERROR(errorToErrorCode(Buffer->commit()));132    // Write to end of buffer to verify it is writable.133    memcpy(Buffer->getBufferEnd() - 20, "AABBCCDDEEFFGGHHIIJJ", 20);134    // Commit buffer.135    ASSERT_NO_ERROR(errorToErrorCode(Buffer->commit()));136  }137 138  // Verify file is correct size.139  uint64_t File5Size;140  ASSERT_NO_ERROR(fs::file_size(Twine(File5), File5Size));141  ASSERT_EQ(File5Size, 8000ULL);142  ASSERT_NO_ERROR(fs::remove(File5.str()));143 144  // TEST 6: Create an empty file.145  SmallString<128> File6(TestDirectory);146  File6.append("/file6");147  {148    Expected<std::unique_ptr<FileOutputBuffer>> BufferOrErr =149        FileOutputBuffer::create(File6, 0);150    ASSERT_NO_ERROR(errorToErrorCode(BufferOrErr.takeError()));151    ASSERT_NO_ERROR(errorToErrorCode((*BufferOrErr)->commit()));152  }153  uint64_t File6Size;154  ASSERT_NO_ERROR(fs::file_size(Twine(File6), File6Size));155  ASSERT_EQ(File6Size, 0ULL);156  ASSERT_NO_ERROR(fs::remove(File6.str()));157 158  // Clean up.159  ASSERT_NO_ERROR(fs::remove(TestDirectory.str()));160}161} // anonymous namespace162