1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
/*
* Copyright 2024 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "FakeInputTracingBackend.h"
#include <android-base/logging.h>
#include <utils/Errors.h>
namespace android::inputdispatcher {
namespace {
// Use a larger timeout while waiting for events to be traced, compared to the timeout used while
// waiting to receive events through the input channel. Events are traced from a separate thread,
// which does not have the same high thread priority as the InputDispatcher's thread, so the tracer
// is expected to lag behind the Dispatcher at times.
constexpr auto TRACE_TIMEOUT = std::chrono::seconds(5);
base::ResultError<> error(const std::ostringstream& ss) {
return base::ResultError(ss.str(), BAD_VALUE);
}
inline auto getId(const trace::TracedEvent& v) {
return std::visit([](const auto& event) { return event.id; }, v);
}
MotionEvent toInputEvent(const trace::TracedMotionEvent& e,
const trace::WindowDispatchArgs& dispatchArgs,
const std::array<uint8_t, 32>& hmac) {
MotionEvent traced;
traced.initialize(e.id, e.deviceId, e.source, e.displayId, hmac, e.action, e.actionButton,
dispatchArgs.resolvedFlags, e.edgeFlags, e.metaState, e.buttonState,
e.classification, dispatchArgs.transform, e.xPrecision, e.yPrecision,
e.xCursorPosition, e.yCursorPosition, dispatchArgs.rawTransform, e.downTime,
e.eventTime, e.pointerProperties.size(), e.pointerProperties.data(),
e.pointerCoords.data());
return traced;
}
KeyEvent toInputEvent(const trace::TracedKeyEvent& e, const trace::WindowDispatchArgs& dispatchArgs,
const std::array<uint8_t, 32>& hmac) {
KeyEvent traced;
traced.initialize(e.id, e.deviceId, e.source, e.displayId, hmac, e.action,
dispatchArgs.resolvedFlags, e.keyCode, e.scanCode, e.metaState,
dispatchArgs.resolvedKeyRepeatCount, e.downTime, e.eventTime);
return traced;
}
} // namespace
// --- VerifyingTrace ---
void VerifyingTrace::expectKeyDispatchTraced(const KeyEvent& event, int32_t windowId) {
std::scoped_lock lock(mLock);
mExpectedEvents.emplace_back(event, windowId);
}
void VerifyingTrace::expectMotionDispatchTraced(const MotionEvent& event, int32_t windowId) {
std::scoped_lock lock(mLock);
mExpectedEvents.emplace_back(event, windowId);
}
void VerifyingTrace::verifyExpectedEventsTraced() {
std::unique_lock lock(mLock);
base::ScopedLockAssertion assumeLocked(mLock);
// Poll for all expected events to be traced, and keep track of the latest poll result.
base::Result<void> result;
mEventTracedCondition.wait_for(lock, TRACE_TIMEOUT, [&]() REQUIRES(mLock) {
for (const auto& [expectedEvent, windowId] : mExpectedEvents) {
std::visit([&](const auto& event)
REQUIRES(mLock) { result = verifyEventTraced(event, windowId); },
expectedEvent);
if (!result.ok()) {
return false;
}
}
return true;
});
EXPECT_TRUE(result.ok())
<< "Timed out waiting for all expected events to be traced successfully: "
<< result.error().message();
}
void VerifyingTrace::reset() {
std::scoped_lock lock(mLock);
mTracedEvents.clear();
mTracedWindowDispatches.clear();
mExpectedEvents.clear();
}
template <typename Event>
base::Result<void> VerifyingTrace::verifyEventTraced(const Event& expectedEvent,
int32_t expectedWindowId) const {
std::ostringstream msg;
auto tracedEventsIt = mTracedEvents.find(expectedEvent.getId());
if (tracedEventsIt == mTracedEvents.end()) {
msg << "Expected event with ID 0x" << std::hex << expectedEvent.getId()
<< " to be traced, but it was not.\n"
<< "Expected event: " << expectedEvent;
return error(msg);
}
auto tracedDispatchesIt =
std::find_if(mTracedWindowDispatches.begin(), mTracedWindowDispatches.end(),
[&](const trace::WindowDispatchArgs& args) {
return args.windowId == expectedWindowId &&
getId(args.eventEntry) == expectedEvent.getId();
});
if (tracedDispatchesIt == mTracedWindowDispatches.end()) {
msg << "Expected dispatch of event with ID 0x" << std::hex << expectedEvent.getId()
<< " to window with ID 0x" << expectedWindowId << " to be traced, but it was not.\n"
<< "Expected event: " << expectedEvent;
return error(msg);
}
// Verify that the traced event matches the expected event exactly.
return std::visit(
[&](const auto& traced) -> base::Result<void> {
Event tracedEvent;
using T = std::decay_t<decltype(traced)>;
if constexpr (std::is_same_v<Event, MotionEvent> &&
std::is_same_v<T, trace::TracedMotionEvent>) {
tracedEvent =
toInputEvent(traced, *tracedDispatchesIt, expectedEvent.getHmac());
} else if constexpr (std::is_same_v<Event, KeyEvent> &&
std::is_same_v<T, trace::TracedKeyEvent>) {
tracedEvent =
toInputEvent(traced, *tracedDispatchesIt, expectedEvent.getHmac());
} else {
msg << "Received the wrong event type!\n"
<< "Expected event: " << expectedEvent;
return error(msg);
}
const auto result = testing::internal::CmpHelperEQ("expectedEvent", "tracedEvent",
expectedEvent, tracedEvent);
if (!result) {
msg << result.failure_message();
return error(msg);
}
return {};
},
tracedEventsIt->second);
}
// --- FakeInputTracingBackend ---
void FakeInputTracingBackend::traceKeyEvent(const trace::TracedKeyEvent& event,
const trace::TracedEventMetadata&) {
{
std::scoped_lock lock(mTrace->mLock);
mTrace->mTracedEvents.emplace(event.id, event);
}
mTrace->mEventTracedCondition.notify_all();
}
void FakeInputTracingBackend::traceMotionEvent(const trace::TracedMotionEvent& event,
const trace::TracedEventMetadata&) {
{
std::scoped_lock lock(mTrace->mLock);
mTrace->mTracedEvents.emplace(event.id, event);
}
mTrace->mEventTracedCondition.notify_all();
}
void FakeInputTracingBackend::traceWindowDispatch(const trace::WindowDispatchArgs& args,
const trace::TracedEventMetadata&) {
{
std::scoped_lock lock(mTrace->mLock);
mTrace->mTracedWindowDispatches.push_back(args);
}
mTrace->mEventTracedCondition.notify_all();
}
} // namespace android::inputdispatcher
|