/*
 * Copyright (c) 2022 Huawei Device Co., Ltd.
 * 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 "backendsinglestep_fuzzer.h"
#include "ecmascript/napi/include/jsnapi.h"
#include "agent/debugger_impl.h"
#include "tooling/backend/js_pt_hooks.h"

using namespace panda;
using namespace panda::ecmascript;
using namespace panda::ecmascript::tooling;

#define MAXBYTELEN sizeof(int32_t)

namespace OHOS {
    void BackendSingleStepFuzzTest(const uint8_t* data, size_t size)
    {
        int32_t input = 0;
        RuntimeOption option;
        option.SetLogLevel(RuntimeOption::LOG_LEVEL::ERROR);
        auto vm = JSNApi::CreateJSVM(option);
        {
            if (size <= 0) {
                return;
            }
            if (size > MAXBYTELEN) {
                size = MAXBYTELEN;
            }
            if (memcpy_s(&input, MAXBYTELEN, data, size) != 0) {
                std::cout << "memcpy_s failed!";
                UNREACHABLE();
            }
            const int32_t MaxMemory = 1073741824;
            if (input > MaxMemory) {
                input = MaxMemory;
            }
            using JSPtLocation = tooling::JSPtLocation;
            EntityId methodId(input);
            uint32_t bytecodeOffset = 0;
            auto debugger = std::make_unique<DebuggerImpl>(vm, nullptr, nullptr);
            std::unique_ptr<JSPtHooks> jspthooks = std::make_unique<JSPtHooks>(debugger.get());
            JSPtLocation ptLocation1(nullptr, methodId, bytecodeOffset);
            jspthooks->SingleStep(ptLocation1);
        }
        JSNApi::DestroyJSVM(vm);
    }
}

// Fuzzer entry point.
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
{
    // Run your code on data.
    OHOS::BackendSingleStepFuzzTest(data, size);
    return 0;
}