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 "../../InputDeviceMetricsSource.h"
21 #include "../InputEventTimeline.h"
22 #include "NotifyArgsBuilders.h"
23 #include "dispatcher/LatencyTracker.h"
24
25 namespace android {
26
27 namespace inputdispatcher {
28
29 /**
30 * A processor of InputEventTimelines that does nothing with the provided data.
31 */
32 class EmptyProcessor : public InputEventTimelineProcessor {
33 public:
34 /**
35 * Just ignore the provided timeline
36 */
processTimeline(const InputEventTimeline & timeline)37 void processTimeline(const InputEventTimeline& timeline) override {
38 for (const auto& [token, connectionTimeline] : timeline.connectionTimelines) {
39 connectionTimeline.isComplete();
40 }
41 };
42
pushLatencyStatistics()43 void pushLatencyStatistics() override {}
44
dump(const char * prefix) const45 std::string dump(const char* prefix) const { return ""; };
46 };
47
getConnectionToken(FuzzedDataProvider & fdp,std::array<sp<IBinder>,10> & tokens)48 static sp<IBinder> getConnectionToken(FuzzedDataProvider& fdp,
49 std::array<sp<IBinder>, 10>& tokens) {
50 const bool useExistingToken = fdp.ConsumeBool();
51 if (useExistingToken) {
52 return tokens[fdp.ConsumeIntegralInRange<size_t>(0ul, tokens.size() - 1)];
53 }
54 return sp<BBinder>::make();
55 }
56
LLVMFuzzerTestOneInput(uint8_t * data,size_t size)57 extern "C" int LLVMFuzzerTestOneInput(uint8_t* data, size_t size) {
58 FuzzedDataProvider fdp(data, size);
59
60 EmptyProcessor emptyProcessor;
61 LatencyTracker tracker(emptyProcessor);
62
63 // Make some pre-defined tokens to ensure that some timelines are complete.
64 std::array<sp<IBinder> /*token*/, 10> predefinedTokens;
65 for (sp<IBinder>& token : predefinedTokens) {
66 token = sp<BBinder>::make();
67 }
68
69 // Randomly invoke LatencyTracker api's until randomness is exhausted.
70 while (fdp.remaining_bytes() > 0) {
71 fdp.PickValueInArray<std::function<void()>>({
72 [&]() -> void {
73 const int32_t inputEventId = fdp.ConsumeIntegral<int32_t>();
74 const nsecs_t eventTime = fdp.ConsumeIntegral<nsecs_t>();
75 const nsecs_t readTime = fdp.ConsumeIntegral<nsecs_t>();
76 const DeviceId deviceId = fdp.ConsumeIntegral<int32_t>();
77 const int32_t source = fdp.ConsumeIntegral<int32_t>();
78 std::set<InputDeviceUsageSource> sources = {
79 fdp.ConsumeEnum<InputDeviceUsageSource>()};
80 const int32_t inputEventActionType = fdp.ConsumeIntegral<int32_t>();
81 const InputEventType inputEventType = fdp.ConsumeEnum<InputEventType>();
82 const NotifyMotionArgs args =
83 MotionArgsBuilder(inputEventActionType, source, inputEventId)
84 .eventTime(eventTime)
85 .readTime(readTime)
86 .deviceId(deviceId)
87 .pointer(PointerBuilder(/*id=*/0, ToolType::FINGER)
88 .x(100)
89 .y(200))
90 .build();
91 tracker.trackListener(args);
92 },
93 [&]() -> void {
94 const int32_t inputEventId = fdp.ConsumeIntegral<int32_t>();
95 sp<IBinder> connectionToken = getConnectionToken(fdp, predefinedTokens);
96 const nsecs_t deliveryTime = fdp.ConsumeIntegral<nsecs_t>();
97 const nsecs_t consumeTime = fdp.ConsumeIntegral<nsecs_t>();
98 const nsecs_t finishTime = fdp.ConsumeIntegral<nsecs_t>();
99 tracker.trackFinishedEvent(inputEventId, connectionToken, deliveryTime,
100 consumeTime, finishTime);
101 },
102 [&]() -> void {
103 const int32_t inputEventId = fdp.ConsumeIntegral<int32_t>();
104 sp<IBinder> connectionToken = getConnectionToken(fdp, predefinedTokens);
105 std::array<nsecs_t, GraphicsTimeline::SIZE> graphicsTimeline{};
106 for (nsecs_t& t : graphicsTimeline) {
107 t = fdp.ConsumeIntegral<nsecs_t>();
108 }
109 tracker.trackGraphicsLatency(inputEventId, connectionToken, graphicsTimeline);
110 },
111 })();
112 }
113
114 return 0;
115 }
116
117 } // namespace inputdispatcher
118
119 } // namespace android