Merge "Removed RWLock fuzzer" am: 92891099

    srcs: ["StopWatch_fuzz.cpp"],

}

cc_fuzz {

    name: "libutils_fuzz_rwlock",

    defaults: ["libutils_fuzz_defaults"],

    srcs: ["RWLock_fuzz.cpp"],

}

cc_fuzz {

    name: "libutils_fuzz_refbase",

    defaults: ["libutils_fuzz_defaults"],

/*

 * 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;

}