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// Copyright 2020 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "absl/strings/str_cat.h"
#include "benchmark/benchmark.h"
#include "gtest/gtest.h"
#include "test/util/fs_util.h"
#include "test/util/temp_path.h"
#include "test/util/test_util.h"
namespace gvisor {
namespace testing {
namespace {
void BM_Symlink(benchmark::State& state) {
char* fuse_prefix = getenv("TEST_FUSEPRE");
ASSERT_NE(fuse_prefix, nullptr);
const TempPath top_dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
std::string dir_path = top_dir.path();
const int size = state.range(0);
std::vector<TempPath> cache;
for (int i = 0; i < size; i++) {
auto path = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
cache.emplace_back(std::move(path));
}
int index = 0;
unsigned int seed = 1;
for (auto t : state) {
const int chosen = rand_r(&seed) % size;
const std::string symlink_path = absl::StrCat(fuse_prefix, dir_path, index);
ASSERT_THAT(symlink(cache[chosen].path().c_str(), symlink_path.c_str()),
SyscallSucceeds());
index++;
}
}
BENCHMARK(BM_Symlink)->Range(1, 128)->UseRealTime();
} // namespace
} // namespace testing
} // namespace gvisor
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