1/*
2 * Copyright (c) 2024 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16#include "appstateobservermanager_fuzzer.h"
17
18#include <cstddef>
19#include <cstdint>
20
21#define private public
22#include "app_state_observer_manager.h"
23#include "appspawn.h"
24#undef private
25#include "parcel.h"
26#include "securec.h"
27
28using namespace OHOS::AAFwk;
29using namespace OHOS::AppExecFwk;
30
31namespace OHOS {
32namespace {
33constexpr size_t FOO_MAX_LEN = 1024;
34constexpr size_t U32_AT_SIZE = 4;
35constexpr uint8_t ENABLE = 2;
36constexpr size_t OFFSET_ZERO = 24;
37constexpr size_t OFFSET_ONE = 16;
38constexpr size_t OFFSET_TWO = 8;
39}
40uint32_t GetU32Data(const char* ptr)
41{
42    // convert fuzz input data to an integer
43    return (ptr[0] << OFFSET_ZERO) | (ptr[1] << OFFSET_ONE) | (ptr[2] << OFFSET_TWO) | ptr[3];
44}
45bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
46{
47    std::shared_ptr<AppStateObserverManager> appStateObserverManager = std::make_shared<AppStateObserverManager>();
48    if (appStateObserverManager == nullptr) {
49        return false;
50    }
51    sptr<IApplicationStateObserver> observer;
52    std::vector<std::string> bundleNameList;
53    appStateObserverManager->RegisterApplicationStateObserver(observer, bundleNameList);
54    appStateObserverManager->UnregisterApplicationStateObserver(observer);
55    std::shared_ptr<AppRunningRecord> appRecord;
56    appStateObserverManager->HandleOnAppProcessCreated(appRecord, false);
57    ApplicationState state = ApplicationState::APP_STATE_CREATE;
58    bool needNotifyApp = *data % ENABLE;
59    bool isFromWindowFocusChanged = *data % ENABLE;
60    appStateObserverManager->HandleAppStateChanged(appRecord, state, needNotifyApp, isFromWindowFocusChanged);
61    appStateObserverManager->HandleOnAppProcessDied(appRecord);
62    std::shared_ptr<RenderRecord> renderRecord;
63    appStateObserverManager->HandleOnRenderProcessCreated(renderRecord);
64    appStateObserverManager->HandleOnRenderProcessDied(renderRecord);
65    ProcessData processData;
66    appStateObserverManager->HandleOnProcessCreated(processData);
67    appStateObserverManager->HandleOnProcessStateChanged(appRecord);
68    appStateObserverManager->HandleOnProcessDied(processData);
69    AbilityStateData abilityStateData;
70    bool isAbility = *data % ENABLE;
71    appStateObserverManager->HandleStateChangedNotifyObserver(abilityStateData, isAbility, isFromWindowFocusChanged);
72    return true;
73}
74}
75
76/* Fuzzer entry point */
77extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
78{
79    /* Run your code on data */
80    if (data == nullptr) {
81        std::cout << "invalid data" << std::endl;
82        return 0;
83    }
84
85    /* Validate the length of size */
86    if (size > OHOS::FOO_MAX_LEN || size < OHOS::U32_AT_SIZE) {
87        return 0;
88    }
89
90    char* ch = (char*)malloc(size + 1);
91    if (ch == nullptr) {
92        std::cout << "malloc failed." << std::endl;
93        return 0;
94    }
95
96    (void)memset_s(ch, size + 1, 0x00, size + 1);
97    if (memcpy_s(ch, size, data, size) != EOK) {
98        std::cout << "copy failed." << std::endl;
99        free(ch);
100        ch = nullptr;
101        return 0;
102    }
103
104    OHOS::DoSomethingInterestingWithMyAPI(ch, size);
105    free(ch);
106    ch = nullptr;
107    return 0;
108}
109
110