1 /*
2 * Copyright (c) 2022-2023 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 #define private public
17 #define protected public
18 #include "event_handler.h"
19 #undef private
20 #undef protected
21
22 #include "eventhandler_fuzzer.h"
23 #include "securec.h"
24 #include "deamon_io_waiter.h"
25
26 namespace OHOS {
27 namespace {
28 constexpr size_t U32_AT_SIZE = 4;
29 }
30
31 class DumperTest : public AppExecFwk::Dumper {
32 public:
33 DumperTest() = default;
~DumperTest()34 virtual ~DumperTest()
35 {};
Dump(const std::string & message)36 void Dump(const std::string &message) override
37 {}
GetTag()38 std::string GetTag() override
39 {
40 return {};
41 }
42 };
43
44 class MyFileDescriptorListener : public AppExecFwk::FileDescriptorListener {
45 public:
MyFileDescriptorListener()46 MyFileDescriptorListener()
47 {}
~MyFileDescriptorListener()48 ~MyFileDescriptorListener()
49 {}
50
51 /* @param int32_t fileDescriptor */
OnReadable(int32_t)52 void OnReadable(int32_t)
53 {}
54
55 /* @param int32_t fileDescriptor */
OnWritable(int32_t)56 void OnWritable(int32_t)
57 {}
58
59 /* @param int32_t fileDescriptor */
OnException(int32_t)60 void OnException(int32_t)
61 {}
62
63 MyFileDescriptorListener(const MyFileDescriptorListener &) = delete;
64 MyFileDescriptorListener &operator=(const MyFileDescriptorListener &) = delete;
65 MyFileDescriptorListener(MyFileDescriptorListener &&) = delete;
66 MyFileDescriptorListener &operator=(MyFileDescriptorListener &&) = delete;
67 };
68
DoSomethingInterestingWithMyAPI(const char * data,size_t size)69 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
70 {
71 std::shared_ptr<AppExecFwk::EventRunner> runner = nullptr;
72 AppExecFwk::EventHandler eventHandler(runner);
73 uint32_t innerEventId = *data;
74 std::list<AppExecFwk::InnerEvent::Pointer> events;
75 AppExecFwk::InnerEvent::Pointer event = std::move(events.front());
76 int64_t taskTime = U32_AT(reinterpret_cast<const uint8_t*>(data));
77 AppExecFwk::EventQueue::Priority priority = AppExecFwk::EventQueue::Priority::LOW;
78 int32_t fileDescriptor = U32_AT(reinterpret_cast<const uint8_t*>(data));
79 DumperTest dumper;
80 eventHandler.Dump(dumper);
81 eventHandler.GetEventName(event);
82 eventHandler.ProcessEvent(event);
83 eventHandler.RemoveAllFileDescriptorListeners();
84 eventHandler.SendTimingEvent(event, taskTime, priority);
85 eventHandler.RemoveFileDescriptorListener(fileDescriptor);
86 eventHandler.SendEvent(event, taskTime, priority);
87 eventHandler.SendSyncEvent(event, priority);
88 eventHandler.RemoveAllEvents();
89 eventHandler.RemoveEvent(innerEventId, taskTime);
90 eventHandler.RemoveEvent(innerEventId);
91 std::string stringData(data);
92 eventHandler.RemoveTask(stringData);
93 auto fileDescriptorListener = std::make_shared<MyFileDescriptorListener>();
94 eventHandler.AddFileDescriptorListener(fileDescriptor, innerEventId, fileDescriptorListener,
95 "DoSomethingInterestingWithMyAPI");
96 eventHandler.SetEventRunner(runner);
97 eventHandler.GetEventRunner();
98 eventHandler.DistributeEvent(event);
99 eventHandler.HasInnerEvent(taskTime);
100 AppExecFwk::DeamonIoWaiter::GetInstance().Init();
101 AppExecFwk::DeamonIoWaiter::GetInstance().StartEpollIoWaiter();
102 AppExecFwk::DeamonIoWaiter::GetInstance().StopEpollIoWaiter();
103 AppExecFwk::DeamonIoWaiter::GetInstance().NotifyOne();
104 AppExecFwk::DeamonIoWaiter::GetInstance().NotifyAll();
105 AppExecFwk::DeamonIoWaiter::GetInstance().SupportListeningFileDescriptor();
106 return eventHandler.HasInnerEvent(innerEventId);
107 }
108 }
109
110 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)111 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
112 {
113 /* Run your code on data */
114 if (data == nullptr) {
115 return 0;
116 }
117
118 if (size < OHOS::U32_AT_SIZE) {
119 return 0;
120 }
121
122 char* ch = reinterpret_cast<char *>(malloc(size + 1));
123 if (ch == nullptr) {
124 return 0;
125 }
126
127 (void)memset_s(ch, size + 1, 0x00, size + 1);
128 if (memcpy_s(ch, size, data, size) != EOK) {
129 free(ch);
130 ch = nullptr;
131 return 0;
132 }
133
134 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
135 free(ch);
136 ch = nullptr;
137 return 0;
138 }
139