1 /*
2 * Copyright (c) 2022 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 "none_io_waiter.h"
17 #include "noneiowaiter_fuzzer.h"
18 #include "securec.h"
19
20 namespace OHOS {
21 namespace {
22 constexpr size_t U32_AT_SIZE = 4;
23 }
24 class NoneFileDescriptorListener : public AppExecFwk::FileDescriptorListener {
25 public:
NoneFileDescriptorListener()26 NoneFileDescriptorListener()
27 {}
~NoneFileDescriptorListener()28 ~NoneFileDescriptorListener()
29 {}
30
31 /* @param int32_t fileDescriptor */
OnReadable(int32_t)32 void OnReadable(int32_t)
33 {}
34
35 /* @param int32_t fileDescriptor */
OnWritable(int32_t)36 void OnWritable(int32_t)
37 {}
38
39 /* @param int32_t fileDescriptor */
OnException(int32_t)40 void OnException(int32_t)
41 {}
42
43 NoneFileDescriptorListener(const NoneFileDescriptorListener &) = delete;
44 NoneFileDescriptorListener &operator=(const NoneFileDescriptorListener &) = delete;
45 NoneFileDescriptorListener(NoneFileDescriptorListener &&) = delete;
46 NoneFileDescriptorListener &operator=(NoneFileDescriptorListener &&) = delete;
47 };
DoSomethingInterestingWithMyAPI(const char * data,size_t size)48 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
49 {
50 uint32_t events = *data;
51 int32_t fileDescriptor = U32_AT(reinterpret_cast<const uint8_t*>(data));
52 AppExecFwk::IoWaiter::FileDescriptorEventCallback callback;
53 AppExecFwk::NoneIoWaiter noneIoWaiter;
54 auto listener = std::make_shared<NoneFileDescriptorListener>();
55 noneIoWaiter.AddFileDescriptor(fileDescriptor, events, "DoSomethingInterestingWithMyAPI",
56 listener, AppExecFwk::EventQueue::Priority::HIGH);
57 noneIoWaiter.RemoveFileDescriptor(fileDescriptor);
58 noneIoWaiter.SetFileDescriptorEventCallback(callback);
59 return true;
60 }
61 }
62
63 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)64 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
65 {
66 /* Run your code on data */
67 if (data == nullptr) {
68 return 0;
69 }
70
71 if (size < OHOS::U32_AT_SIZE) {
72 return 0;
73 }
74
75 char* ch = (char *)malloc(size + 1);
76 if (ch == nullptr) {
77 return 0;
78 }
79
80 (void)memset_s(ch, size + 1, 0x00, size + 1);
81 if (memcpy_s(ch, size, data, size) != EOK) {
82 free(ch);
83 ch = nullptr;
84 return 0;
85 }
86
87 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
88 free(ch);
89 ch = nullptr;
90 return 0;
91 }
92