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 "unregisterapplicationstateobserver_fuzzer.h"
17 
18 #include <cstddef>
19 #include <cstdint>
20 
21 #define private public
22 #include "app_mgr_service.h"
23 #undef private
24 #include "iapplication_state_observer.h"
25 #include "securec.h"
26 
27 using namespace OHOS::AAFwk;
28 using namespace OHOS::AppExecFwk;
29 
30 namespace OHOS {
31 namespace {
32 constexpr size_t FOO_MAX_LEN = 1024;
33 constexpr size_t U32_AT_SIZE = 4;
34 }
DoSomethingInterestingWithMyAPI(const char * data,size_t size)35 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
36 {
37     std::shared_ptr<AppMgrService> appMgrService = std::make_shared<AppMgrService>();
38     sptr<IApplicationStateObserver> observer;
39     if (!appMgrService) {
40         return false;
41     }
42 
43     if (appMgrService->UnregisterApplicationStateObserver(observer) != 0) {
44         return false;
45     }
46 
47     return true;
48 }
49 }
50 
51 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)52 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
53 {
54     /* Run your code on data */
55     if (data == nullptr) {
56         std::cout << "invalid data" << std::endl;
57         return 0;
58     }
59 
60     /* Validate the length of size */
61     if (size > OHOS::FOO_MAX_LEN || size < OHOS::U32_AT_SIZE) {
62         return 0;
63     }
64 
65     char* ch = static_cast<char*>(malloc(size + 1));
66     if (ch == nullptr) {
67         std::cout << "malloc failed." << std::endl;
68         return 0;
69     }
70 
71     (void)memset_s(ch, size + 1, 0x00, size + 1);
72     if (memcpy_s(ch, size, data, size) != EOK) {
73         std::cout << "copy failed." << std::endl;
74         free(ch);
75         ch = nullptr;
76         return 0;
77     }
78 
79     OHOS::DoSomethingInterestingWithMyAPI(ch, size);
80     free(ch);
81     ch = nullptr;
82     return 0;
83 }