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/*
* Copyright 2020 The Android Open Source Project
*
* 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 <functional>
#include "fuzzer/FuzzedDataProvider.h"
#include "utils/RWLock.h"
static constexpr int MAX_OPERATIONS = 100;
static constexpr int MAX_NAME_LEN = 2048;
static const std::vector<std::function<void(android::RWLock*)>> operations = {
[](android::RWLock* lock) -> void {
// This might return a non-zero value if already locked
// Either way we are definitely locked now.
lock->tryWriteLock();
},
[](android::RWLock* lock) -> void { lock->tryReadLock(); },
[](android::RWLock* lock) -> void { lock->unlock(); },
};
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
FuzzedDataProvider dataProvider(data, size);
std::string nameStr = dataProvider.ConsumeRandomLengthString(MAX_NAME_LEN);
int type = dataProvider.ConsumeIntegral<int>();
android::RWLock rwLock = android::RWLock(type, nameStr.c_str());
std::vector<uint8_t> opsToRun = dataProvider.ConsumeRemainingBytes<uint8_t>();
int opsRun = 0;
for (auto it : opsToRun) {
if (opsRun++ >= MAX_OPERATIONS) {
break;
}
it = it % operations.size();
operations[it](&rwLock);
}
rwLock.unlock();
return 0;
}
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