1 /*
2 * Copyright 2021 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <fuzzer/FuzzedDataProvider.h>
18 #include <linux/input.h>
19
20 #include <vector>
21
22 #include "../../InputDeviceMetricsSource.h"
23 #include "../InputEventTimeline.h"
24 #include "NotifyArgsBuilders.h"
25 #include "dispatcher/LatencyTracker.h"
26
27 namespace android {
28
29 namespace inputdispatcher {
30
31 /**
32 * A processor of InputEventTimelines that does nothing with the provided data.
33 */
34 class EmptyProcessor : public InputEventTimelineProcessor {
35 public:
36 /**
37 * Just ignore the provided timeline
38 */
processTimeline(const InputEventTimeline & timeline)39 void processTimeline(const InputEventTimeline& timeline) override {
40 for (const auto& [token, connectionTimeline] : timeline.connectionTimelines) {
41 connectionTimeline.isComplete();
42 }
43 };
44
pushLatencyStatistics()45 void pushLatencyStatistics() override {}
46
dump(const char * prefix) const47 std::string dump(const char* prefix) const { return ""; };
48 };
49
getConnectionToken(FuzzedDataProvider & fdp,std::array<sp<IBinder>,10> & tokens)50 static sp<IBinder> getConnectionToken(FuzzedDataProvider& fdp,
51 std::array<sp<IBinder>, 10>& tokens) {
52 const bool useExistingToken = fdp.ConsumeBool();
53 if (useExistingToken) {
54 return tokens[fdp.ConsumeIntegralInRange<size_t>(0ul, tokens.size() - 1)];
55 }
56 return sp<BBinder>::make();
57 }
58
LLVMFuzzerTestOneInput(uint8_t * data,size_t size)59 extern "C" int LLVMFuzzerTestOneInput(uint8_t* data, size_t size) {
60 FuzzedDataProvider fdp(data, size);
61
62 EmptyProcessor emptyProcessor;
63 std::vector<InputDeviceInfo> emptyDevices;
64 LatencyTracker tracker(emptyProcessor, emptyDevices);
65
66 // Make some pre-defined tokens to ensure that some timelines are complete.
67 std::array<sp<IBinder> /*token*/, 10> predefinedTokens;
68 for (sp<IBinder>& token : predefinedTokens) {
69 token = sp<BBinder>::make();
70 }
71
72 // Randomly invoke LatencyTracker api's until randomness is exhausted.
73 while (fdp.remaining_bytes() > 0) {
74 fdp.PickValueInArray<std::function<void()>>({
75 [&]() -> void {
76 const int32_t inputEventId = fdp.ConsumeIntegral<int32_t>();
77 const nsecs_t eventTime = fdp.ConsumeIntegral<nsecs_t>();
78 const nsecs_t readTime = fdp.ConsumeIntegral<nsecs_t>();
79 const DeviceId deviceId = fdp.ConsumeIntegral<int32_t>();
80 const int32_t source = fdp.ConsumeIntegral<int32_t>();
81 std::set<InputDeviceUsageSource> sources = {
82 fdp.ConsumeEnum<InputDeviceUsageSource>()};
83 const int32_t inputEventActionType = fdp.ConsumeIntegral<int32_t>();
84 const InputEventType inputEventType = fdp.ConsumeEnum<InputEventType>();
85 const NotifyMotionArgs args =
86 MotionArgsBuilder(inputEventActionType, source, inputEventId)
87 .eventTime(eventTime)
88 .readTime(readTime)
89 .deviceId(deviceId)
90 .pointer(PointerBuilder(/*id=*/0, ToolType::FINGER)
91 .x(100)
92 .y(200))
93 .build();
94 tracker.trackListener(args);
95 },
96 [&]() -> void {
97 const int32_t inputEventId = fdp.ConsumeIntegral<int32_t>();
98 sp<IBinder> connectionToken = getConnectionToken(fdp, predefinedTokens);
99 const nsecs_t deliveryTime = fdp.ConsumeIntegral<nsecs_t>();
100 const nsecs_t consumeTime = fdp.ConsumeIntegral<nsecs_t>();
101 const nsecs_t finishTime = fdp.ConsumeIntegral<nsecs_t>();
102 tracker.trackFinishedEvent(inputEventId, connectionToken, deliveryTime,
103 consumeTime, finishTime);
104 },
105 [&]() -> void {
106 const int32_t inputEventId = fdp.ConsumeIntegral<int32_t>();
107 sp<IBinder> connectionToken = getConnectionToken(fdp, predefinedTokens);
108 std::array<nsecs_t, GraphicsTimeline::SIZE> graphicsTimeline{};
109 for (nsecs_t& t : graphicsTimeline) {
110 t = fdp.ConsumeIntegral<nsecs_t>();
111 }
112 tracker.trackGraphicsLatency(inputEventId, connectionToken, graphicsTimeline);
113 },
114 })();
115 }
116
117 return 0;
118 }
119
120 } // namespace inputdispatcher
121
122 } // namespace android