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//===- unittests/LockFileManagerTest.cpp - LockFileManager tests ----------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/LockFileManager.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "gtest/gtest.h"
#include <memory>
using namespace llvm;
namespace {
TEST(LockFileManagerTest, Basic) {
SmallString<64> TmpDir;
error_code EC;
EC = sys::fs::createUniqueDirectory("LockFileManagerTestDir", TmpDir);
ASSERT_FALSE(EC);
SmallString<64> LockedFile(TmpDir);
sys::path::append(LockedFile, "file.lock");
{
// The lock file should not exist, so we should successfully acquire it.
LockFileManager Locked1(LockedFile);
EXPECT_EQ(LockFileManager::LFS_Owned, Locked1.getState());
// Attempting to reacquire the lock should fail. Waiting on it would cause
// deadlock, so don't try that.
LockFileManager Locked2(LockedFile);
EXPECT_NE(LockFileManager::LFS_Owned, Locked2.getState());
}
// Now that the lock is out of scope, the file should be gone.
EXPECT_FALSE(sys::fs::exists(StringRef(LockedFile)));
EC = sys::fs::remove(StringRef(TmpDir));
ASSERT_FALSE(EC);
}
TEST(LockFileManagerTest, LinkLockExists) {
SmallString<64> TmpDir;
error_code EC;
EC = sys::fs::createUniqueDirectory("LockFileManagerTestDir", TmpDir);
ASSERT_FALSE(EC);
SmallString<64> LockedFile(TmpDir);
sys::path::append(LockedFile, "file");
SmallString<64> FileLocK(TmpDir);
sys::path::append(FileLocK, "file.lock");
SmallString<64> TmpFileLock(TmpDir);
sys::path::append(TmpFileLock, "file.lock-000");
EC = sys::fs::create_link(TmpFileLock.str(), FileLocK.str());
#if defined(_WIN32)
// Win32 cannot create link with nonexistent file, since create_link is
// implemented as hard link.
ASSERT_EQ(EC, errc::no_such_file_or_directory);
#else
ASSERT_FALSE(EC);
#endif
{
// The lock file doesn't point to a real file, so we should successfully
// acquire it.
LockFileManager Locked(LockedFile);
EXPECT_EQ(LockFileManager::LFS_Owned, Locked.getState());
}
// Now that the lock is out of scope, the file should be gone.
EXPECT_FALSE(sys::fs::exists(StringRef(LockedFile)));
EC = sys::fs::remove(StringRef(TmpDir));
ASSERT_FALSE(EC);
}
TEST(LockFileManagerTest, RelativePath) {
SmallString<64> TmpDir;
error_code EC;
EC = sys::fs::createUniqueDirectory("LockFileManagerTestDir", TmpDir);
ASSERT_FALSE(EC);
char PathBuf[1024];
const char *OrigPath = getcwd(PathBuf, 1024);
chdir(TmpDir.c_str());
sys::fs::create_directory("inner");
SmallString<64> LockedFile("inner");
sys::path::append(LockedFile, "file");
SmallString<64> FileLock(LockedFile);
FileLock += ".lock";
{
// The lock file should not exist, so we should successfully acquire it.
LockFileManager Locked(LockedFile);
EXPECT_EQ(LockFileManager::LFS_Owned, Locked.getState());
EXPECT_TRUE(sys::fs::exists(FileLock.str()));
}
// Now that the lock is out of scope, the file should be gone.
EXPECT_FALSE(sys::fs::exists(LockedFile.str()));
EXPECT_FALSE(sys::fs::exists(FileLock.str()));
EC = sys::fs::remove("inner");
ASSERT_FALSE(EC);
EC = sys::fs::remove(StringRef(TmpDir));
#if defined(_WIN32)
// Win32 cannot remove working directory.
ASSERT_EQ(EC, errc::permission_denied);
#else
ASSERT_FALSE(EC);
#endif
chdir(OrigPath);
#if defined(_WIN32)
EC = sys::fs::remove(StringRef(TmpDir));
ASSERT_FALSE(EC);
#endif
}
} // end anonymous namespace
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