Report ANR when waited for longer than the timeout
Previously, when the touched window was unresponsive, we skipped adding
the gesture monitors to the touch targets. That means, when an app has
ANR, gesture nav stops working, and the phone feels frozen, until the
ANR dialog comes up.
Another failure mode was a stuck pending event. If there is no focused
window, and we have a pending key event (or any focused event), we will
be waiting for a focused window to appear. That would still prevent
gesture monitors from receiving further touch events.
In this solution, we do not add unresponsive windows to the list of
targets, but we still proceed with handling the event, meaning that the
app won't get a new DOWN when it is unresponsive, but the event would
still go to the gesture monitors.
That change, in isolation, would also break ANR for the case when the
app loses focus. To maintain the ANR functionality, we extend the ANR
detection mechanism to all connections. Now, every connection is
eligible to receive an ANR, even if it's a gesture monitor. We expect
everything in the system to be responsive within reasonable timeouts.
We also change the handling of extended ANR timeouts coming from policy.
Today, the behaviour is as follows:
1. If the policy says "wait longer", then we do nothing and just keep
waiting
2. If the policy says "abort", then we send the cancel events and remove
the window from the window list.
The "abort" approach seems incorrect, because the policy will probably
not register the existing inputchannel/connection with a new window. If
the user does click "close app" when the ANR dialog appears, we will
anyways receive "window removed" event via setInputWindows, and will
clean up the connection that way. So we don't really need to do anything
other than sending "cancel events" to the window.
The policy now for sending events to unresponsive windows becomes:
1. If the unresponsive window is touched, the new touch stream does not
go to the window. It will go to all other places, though.
2. If the unresponsive window receives a focused event, the event still
gets queued for the unresponsive window to handle.
For improved ANR performance, the ANR detection is now done by
introducing a helper data structure, a multiset of the timeout times.
Whenever we send an event to a connection, we will calculate the time
that this event will cause a timeout. We will then add this time to the
multiset of times. When we check for ANR inside dispatchOnce, we will
only access the smallest (soonest) timeout inside the multiset. If the
current time is before this smallest timeout time, then everything is
normal, and we move on. This would cost O(1).
If the time is past the timeout time, it means a connection is
unresponsive. In this case, we take the closest in time unresponsive
entry. That entry already has the connection token, for convenience.
We then raise an ANR on that connection.
The entries are removed from the multiset in several cases:
1. When we receive a 'finished' signal on an entry for a specific
connection
2. When the connection becomes unresponsive and we raise ANR. In that
case, no need to keep checking on the same connection. Once case 1.
applies to that connection, entries from that connection will again
become eligible for being added to the multiset.
3. When we reset and drop everything.
4. When we cannot find a connection for an entry in the multiset, we
will drop all entries from that connection.
If we report ANR for an app, we do not report the second ANR until the
waitQueue becomes healthy first and then becomes clogged again.
If we have a focused application, but no window has focus, then nothing
will happen for pointer events. They will keep going to the touched
window as normal. When we receive the first focused event,
however, we will start a timer. If there is no focused window added by
that time, we will send an ANR for that application. This logic should
be moved into WM later, because from the input perspective, it is
legitimate to have an application without a focused window. This would
also allow WM to remove the "setFocusedApplication" call.
Bug: 143459140
Test: use the test app from the bug. The app sleeps for 10 seconds when
the button is clicked. Click the button, and try to use gesture nav
several times. Observe that gesture nav continues to work even after app
has ANR.
Observe that ANR is reported even after interacting with gesture nav.
Test: Click on the app multiple times (to clog up the queue), and then
wait for a long time, even after the ANR dialog shows up. Then click
"wait" to not close the app. Then click again on the app. Observe that
the anr dialog appears after a while. This indicates that at some point,
the app processed all events, and then became eligible for anr again.
Test: adb shell -t /data/nativetest64/inputflinger_tests/inputflinger_tests
Test: create an app that sets "FLAG_NOT_FOCUSABLE" on its only window.
Launch the app and interact with it by touch. Notice that the app does
not ANR. Then, send the back key to the app (using the back gesture).
Notice that in 5 seconds, we receive an ANR for this app. While the BACK
key is queued up for this app, the gesture nav continues to work and the
notification shade can still be pulled down.
Change-Id: I2c0fd1957cda833f5fbe26368cfcaa6fea6eddaf
diff --git a/services/inputflinger/dispatcher/Android.bp b/services/inputflinger/dispatcher/Android.bp
index b242eec..d29d8df 100644
--- a/services/inputflinger/dispatcher/Android.bp
+++ b/services/inputflinger/dispatcher/Android.bp
@@ -22,6 +22,7 @@
filegroup {
name: "libinputdispatcher_sources",
srcs: [
+ "AnrTracker.cpp",
"Connection.cpp",
"Entry.cpp",
"InjectionState.cpp",
diff --git a/services/inputflinger/dispatcher/AnrTracker.cpp b/services/inputflinger/dispatcher/AnrTracker.cpp
new file mode 100644
index 0000000..c3f611e
--- /dev/null
+++ b/services/inputflinger/dispatcher/AnrTracker.cpp
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2020 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 "AnrTracker.h"
+
+namespace android::inputdispatcher {
+
+template <typename T>
+static T max(const T& a, const T& b) {
+ return a < b ? b : a;
+}
+
+void AnrTracker::insert(nsecs_t timeoutTime, sp<IBinder> token) {
+ mAnrTimeouts.insert(std::make_pair(timeoutTime, std::move(token)));
+}
+
+/**
+ * Erase a single entry only. If there are multiple duplicate entries
+ * (same time, same connection), then only remove one of them.
+ */
+void AnrTracker::erase(nsecs_t timeoutTime, const sp<IBinder>& token) {
+ auto pair = std::make_pair(timeoutTime, token);
+ auto it = mAnrTimeouts.find(pair);
+ if (it != mAnrTimeouts.end()) {
+ mAnrTimeouts.erase(it);
+ }
+}
+
+void AnrTracker::eraseToken(const sp<IBinder>& token) {
+ for (auto it = mAnrTimeouts.begin(); it != mAnrTimeouts.end();) {
+ if (it->second == token) {
+ it = mAnrTimeouts.erase(it);
+ } else {
+ ++it;
+ }
+ }
+}
+
+bool AnrTracker::empty() const {
+ return mAnrTimeouts.empty();
+}
+
+// If empty() is false, return the time at which the next connection should cause an ANR
+// If empty() is true, return LONG_LONG_MAX
+nsecs_t AnrTracker::firstTimeout() const {
+ if (mAnrTimeouts.empty()) {
+ return std::numeric_limits<nsecs_t>::max();
+ }
+ return mAnrTimeouts.begin()->first;
+}
+
+const sp<IBinder>& AnrTracker::firstToken() const {
+ return mAnrTimeouts.begin()->second;
+}
+
+void AnrTracker::clear() {
+ mAnrTimeouts.clear();
+}
+
+} // namespace android::inputdispatcher
diff --git a/services/inputflinger/dispatcher/AnrTracker.h b/services/inputflinger/dispatcher/AnrTracker.h
new file mode 100644
index 0000000..097dba5
--- /dev/null
+++ b/services/inputflinger/dispatcher/AnrTracker.h
@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2020 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.
+ */
+
+#ifndef _UI_INPUT_INPUTDISPATCHER_ANRTRACKER_H
+#define _UI_INPUT_INPUTDISPATCHER_ANRTRACKER_H
+
+#include <binder/IBinder.h>
+#include <utils/Timers.h>
+#include <set>
+
+namespace android::inputdispatcher {
+
+/**
+ * Keeps track of the times when each connection is going to ANR.
+ * Provides the ability to quickly find the connection that is going to cause ANR next.
+ */
+class AnrTracker {
+public:
+ void insert(nsecs_t timeoutTime, sp<IBinder> token);
+ void erase(nsecs_t timeoutTime, const sp<IBinder>& token);
+ void eraseToken(const sp<IBinder>& token);
+ void clear();
+
+ bool empty() const;
+ // If empty() is false, return the time at which the next connection should cause an ANR
+ // If empty() is true, return LONG_LONG_MAX
+ nsecs_t firstTimeout() const;
+ // Return the token of the next connection that should cause an ANR.
+ // Do not call this unless empty() is false, you will encounter undefined behaviour.
+ const sp<IBinder>& firstToken() const;
+
+private:
+ // Optimization: use a multiset to keep track of the event timeouts. When an event is sent
+ // to the InputConsumer, we add an entry to this structure. We look at the smallest value to
+ // determine if any of the connections is unresponsive, and to determine when we should wake
+ // next for the future ANR check.
+ // Using a multiset helps quickly look up the next timeout due.
+ //
+ // We must use a multi-set, because it is plausible (although highly unlikely) to have entries
+ // from the same connection and same timestamp, but different sequence numbers.
+ // We are not tracking sequence numbers, and just allow duplicates to exist.
+ std::multiset<std::pair<nsecs_t /*timeoutTime*/, sp<IBinder> /*connectionToken*/>> mAnrTimeouts;
+};
+
+} // namespace android::inputdispatcher
+
+#endif // _UI_INPUT_INPUTDISPATCHER_ANRTRACKER_H
diff --git a/services/inputflinger/dispatcher/Connection.cpp b/services/inputflinger/dispatcher/Connection.cpp
index 188212b..f5ea563 100644
--- a/services/inputflinger/dispatcher/Connection.cpp
+++ b/services/inputflinger/dispatcher/Connection.cpp
@@ -26,8 +26,7 @@
inputChannel(inputChannel),
monitor(monitor),
inputPublisher(inputChannel),
- inputState(idGenerator),
- inputPublisherBlocked(false) {}
+ inputState(idGenerator) {}
Connection::~Connection() {}
diff --git a/services/inputflinger/dispatcher/Connection.h b/services/inputflinger/dispatcher/Connection.h
index bb3f2fe..3b33f29 100644
--- a/services/inputflinger/dispatcher/Connection.h
+++ b/services/inputflinger/dispatcher/Connection.h
@@ -47,9 +47,10 @@
InputPublisher inputPublisher;
InputState inputState;
- // True if the socket is full and no further events can be published until
- // the application consumes some of the input.
- bool inputPublisherBlocked;
+ // True if this connection is responsive.
+ // If this connection is not responsive, avoid publishing more events to it until the
+ // application consumes some of the input.
+ bool responsive = true;
// Queue of events that need to be published to the connection.
std::deque<DispatchEntry*> outboundQueue;
diff --git a/services/inputflinger/dispatcher/Entry.cpp b/services/inputflinger/dispatcher/Entry.cpp
index 21c8ae1..fdbb1d1 100644
--- a/services/inputflinger/dispatcher/Entry.cpp
+++ b/services/inputflinger/dispatcher/Entry.cpp
@@ -28,38 +28,6 @@
namespace android::inputdispatcher {
-static std::string motionActionToString(int32_t action) {
- // Convert MotionEvent action to string
- switch (action & AMOTION_EVENT_ACTION_MASK) {
- case AMOTION_EVENT_ACTION_DOWN:
- return "DOWN";
- case AMOTION_EVENT_ACTION_MOVE:
- return "MOVE";
- case AMOTION_EVENT_ACTION_UP:
- return "UP";
- case AMOTION_EVENT_ACTION_CANCEL:
- return "CANCEL";
- case AMOTION_EVENT_ACTION_POINTER_DOWN:
- return "POINTER_DOWN";
- case AMOTION_EVENT_ACTION_POINTER_UP:
- return "POINTER_UP";
- }
- return StringPrintf("%" PRId32, action);
-}
-
-static std::string keyActionToString(int32_t action) {
- // Convert KeyEvent action to string
- switch (action) {
- case AKEY_EVENT_ACTION_DOWN:
- return "DOWN";
- case AKEY_EVENT_ACTION_UP:
- return "UP";
- case AKEY_EVENT_ACTION_MULTIPLE:
- return "MULTIPLE";
- }
- return StringPrintf("%" PRId32, action);
-}
-
VerifiedKeyEvent verifiedKeyEventFromKeyEntry(const KeyEntry& entry) {
return {{VerifiedInputEvent::Type::KEY, entry.deviceId, entry.eventTime, entry.source,
entry.displayId},
@@ -191,7 +159,7 @@
msg += StringPrintf("(deviceId=%d, source=0x%08x, displayId=%" PRId32 ", action=%s, "
"flags=0x%08x, keyCode=%d, scanCode=%d, metaState=0x%08x, "
"repeatCount=%d), policyFlags=0x%08x",
- deviceId, source, displayId, keyActionToString(action).c_str(), flags,
+ deviceId, source, displayId, KeyEvent::actionToString(action), flags,
keyCode, scanCode, metaState, repeatCount, policyFlags);
}
@@ -253,7 +221,7 @@
"buttonState=0x%08x, "
"classification=%s, edgeFlags=0x%08x, xPrecision=%.1f, yPrecision=%.1f, "
"xCursorPosition=%0.1f, yCursorPosition=%0.1f, pointers=[",
- deviceId, source, displayId, motionActionToString(action).c_str(),
+ deviceId, source, displayId, MotionEvent::actionToString(action),
actionButton, flags, metaState, buttonState,
motionClassificationToString(classification), edgeFlags, xPrecision,
yPrecision, xCursorPosition, yCursorPosition);
diff --git a/services/inputflinger/dispatcher/Entry.h b/services/inputflinger/dispatcher/Entry.h
index a135409..6b7697d 100644
--- a/services/inputflinger/dispatcher/Entry.h
+++ b/services/inputflinger/dispatcher/Entry.h
@@ -198,7 +198,11 @@
float globalScaleFactor;
float windowXScale = 1.0f;
float windowYScale = 1.0f;
+ // Both deliveryTime and timeoutTime are only populated when the entry is sent to the app,
+ // and will be undefined before that.
nsecs_t deliveryTime; // time when the event was actually delivered
+ // An ANR will be triggered if a response for this entry is not received by timeoutTime
+ nsecs_t timeoutTime;
// Set to the resolved ID, action and flags when the event is enqueued.
int32_t resolvedEventId;
diff --git a/services/inputflinger/dispatcher/InputDispatcher.cpp b/services/inputflinger/dispatcher/InputDispatcher.cpp
index 23dec76..c139dc5 100644
--- a/services/inputflinger/dispatcher/InputDispatcher.cpp
+++ b/services/inputflinger/dispatcher/InputDispatcher.cpp
@@ -90,18 +90,17 @@
// before considering it stale and dropping it.
constexpr nsecs_t STALE_EVENT_TIMEOUT = 10000 * 1000000LL; // 10sec
-// Amount of time to allow touch events to be streamed out to a connection before requiring
-// that the first event be finished. This value extends the ANR timeout by the specified
-// amount. For example, if streaming is allowed to get ahead by one second relative to the
-// queue of waiting unfinished events, then ANRs will similarly be delayed by one second.
-constexpr nsecs_t STREAM_AHEAD_EVENT_TIMEOUT = 500 * 1000000LL; // 0.5sec
-
// Log a warning when an event takes longer than this to process, even if an ANR does not occur.
constexpr nsecs_t SLOW_EVENT_PROCESSING_WARNING_TIMEOUT = 2000 * 1000000LL; // 2sec
// Log a warning when an interception call takes longer than this to process.
constexpr std::chrono::milliseconds SLOW_INTERCEPTION_THRESHOLD = 50ms;
+// Additional key latency in case a connection is still processing some motion events.
+// This will help with the case when a user touched a button that opens a new window,
+// and gives us the chance to dispatch the key to this new window.
+constexpr std::chrono::nanoseconds KEY_WAITING_FOR_EVENTS_TIMEOUT = 500ms;
+
// Number of recent events to keep for debugging purposes.
constexpr size_t RECENT_QUEUE_MAX_SIZE = 10;
@@ -409,8 +408,7 @@
// To avoid leaking stack in case that call never comes, and for tests,
// initialize it here anyways.
mInTouchMode(true),
- mFocusedDisplayId(ADISPLAY_ID_DEFAULT),
- mInputTargetWaitCause(INPUT_TARGET_WAIT_CAUSE_NONE) {
+ mFocusedDisplayId(ADISPLAY_ID_DEFAULT) {
mLooper = new Looper(false);
mReporter = createInputReporter();
@@ -470,6 +468,11 @@
nextWakeupTime = LONG_LONG_MIN;
}
+ // If we are still waiting for ack on some events,
+ // we might have to wake up earlier to check if an app is anr'ing.
+ const nsecs_t nextAnrCheck = processAnrsLocked();
+ nextWakeupTime = std::min(nextWakeupTime, nextAnrCheck);
+
// We are about to enter an infinitely long sleep, because we have no commands or
// pending or queued events
if (nextWakeupTime == LONG_LONG_MAX) {
@@ -483,6 +486,55 @@
mLooper->pollOnce(timeoutMillis);
}
+/**
+ * Check if any of the connections' wait queues have events that are too old.
+ * If we waited for events to be ack'ed for more than the window timeout, raise an ANR.
+ * Return the time at which we should wake up next.
+ */
+nsecs_t InputDispatcher::processAnrsLocked() {
+ const nsecs_t currentTime = now();
+ nsecs_t nextAnrCheck = LONG_LONG_MAX;
+ // Check if we are waiting for a focused window to appear. Raise ANR if waited too long
+ if (mNoFocusedWindowTimeoutTime.has_value() && mAwaitedFocusedApplication != nullptr) {
+ if (currentTime >= *mNoFocusedWindowTimeoutTime) {
+ onAnrLocked(mAwaitedFocusedApplication);
+ mAwaitedFocusedApplication.clear();
+ return LONG_LONG_MIN;
+ } else {
+ // Keep waiting
+ const nsecs_t millisRemaining = ns2ms(*mNoFocusedWindowTimeoutTime - currentTime);
+ ALOGW("Still no focused window. Will drop the event in %" PRId64 "ms", millisRemaining);
+ nextAnrCheck = *mNoFocusedWindowTimeoutTime;
+ }
+ }
+
+ // Check if any connection ANRs are due
+ nextAnrCheck = std::min(nextAnrCheck, mAnrTracker.firstTimeout());
+ if (currentTime < nextAnrCheck) { // most likely scenario
+ return nextAnrCheck; // everything is normal. Let's check again at nextAnrCheck
+ }
+
+ // If we reached here, we have an unresponsive connection.
+ sp<Connection> connection = getConnectionLocked(mAnrTracker.firstToken());
+ if (connection == nullptr) {
+ ALOGE("Could not find connection for entry %" PRId64, mAnrTracker.firstTimeout());
+ return nextAnrCheck;
+ }
+ connection->responsive = false;
+ // Stop waking up for this unresponsive connection
+ mAnrTracker.eraseToken(connection->inputChannel->getConnectionToken());
+ onAnrLocked(connection);
+ return LONG_LONG_MIN;
+}
+
+nsecs_t InputDispatcher::getDispatchingTimeoutLocked(const sp<IBinder>& token) {
+ sp<InputWindowHandle> window = getWindowHandleLocked(token);
+ if (window != nullptr) {
+ return window->getDispatchingTimeout(DEFAULT_INPUT_DISPATCHING_TIMEOUT).count();
+ }
+ return DEFAULT_INPUT_DISPATCHING_TIMEOUT.count();
+}
+
void InputDispatcher::dispatchOnceInnerLocked(nsecs_t* nextWakeupTime) {
nsecs_t currentTime = now();
@@ -546,9 +598,6 @@
if (mPendingEvent->policyFlags & POLICY_FLAG_PASS_TO_USER) {
pokeUserActivityLocked(*mPendingEvent);
}
-
- // Get ready to dispatch the event.
- resetAnrTimeoutsLocked();
}
// Now we have an event to dispatch.
@@ -642,11 +691,14 @@
* Return false otherwise (the default behaviour)
*/
bool InputDispatcher::shouldPruneInboundQueueLocked(const MotionEntry& motionEntry) {
- bool isPointerDownEvent = motionEntry.action == AMOTION_EVENT_ACTION_DOWN &&
+ const bool isPointerDownEvent = motionEntry.action == AMOTION_EVENT_ACTION_DOWN &&
(motionEntry.source & AINPUT_SOURCE_CLASS_POINTER);
- if (isPointerDownEvent &&
- mInputTargetWaitCause == INPUT_TARGET_WAIT_CAUSE_APPLICATION_NOT_READY &&
- mInputTargetWaitApplicationToken != nullptr) {
+
+ // Optimize case where the current application is unresponsive and the user
+ // decides to touch a window in a different application.
+ // If the application takes too long to catch up then we drop all events preceding
+ // the touch into the other window.
+ if (isPointerDownEvent && mAwaitedFocusedApplication != nullptr) {
int32_t displayId = motionEntry.displayId;
int32_t x = static_cast<int32_t>(
motionEntry.pointerCoords[0].getAxisValue(AMOTION_EVENT_AXIS_X));
@@ -655,12 +707,41 @@
sp<InputWindowHandle> touchedWindowHandle =
findTouchedWindowAtLocked(displayId, x, y, nullptr);
if (touchedWindowHandle != nullptr &&
- touchedWindowHandle->getApplicationToken() != mInputTargetWaitApplicationToken) {
+ touchedWindowHandle->getApplicationToken() !=
+ mAwaitedFocusedApplication->getApplicationToken()) {
// User touched a different application than the one we are waiting on.
- // Flag the event, and start pruning the input queue.
- ALOGI("Pruning input queue because user touched a different application");
+ ALOGI("Pruning input queue because user touched a different application while waiting "
+ "for %s",
+ mAwaitedFocusedApplication->getName().c_str());
return true;
}
+
+ // Alternatively, maybe there's a gesture monitor that could handle this event
+ std::vector<TouchedMonitor> gestureMonitors =
+ findTouchedGestureMonitorsLocked(displayId, {});
+ for (TouchedMonitor& gestureMonitor : gestureMonitors) {
+ sp<Connection> connection =
+ getConnectionLocked(gestureMonitor.monitor.inputChannel->getConnectionToken());
+ if (connection->responsive) {
+ // This monitor could take more input. Drop all events preceding this
+ // event, so that gesture monitor could get a chance to receive the stream
+ ALOGW("Pruning the input queue because %s is unresponsive, but we have a "
+ "responsive gesture monitor that may handle the event",
+ mAwaitedFocusedApplication->getName().c_str());
+ return true;
+ }
+ }
+ }
+
+ // Prevent getting stuck: if we have a pending key event, and some motion events that have not
+ // yet been processed by some connections, the dispatcher will wait for these motion
+ // events to be processed before dispatching the key event. This is because these motion events
+ // may cause a new window to be launched, which the user might expect to receive focus.
+ // To prevent waiting forever for such events, just send the key to the currently focused window
+ if (isPointerDownEvent && mKeyIsWaitingForEventsTimeout) {
+ ALOGD("Received a new pointer down event, stop waiting for events to process and "
+ "just send the pending key event to the focused window.");
+ mKeyIsWaitingForEventsTimeout = now();
}
return false;
}
@@ -694,10 +775,6 @@
}
case EventEntry::Type::MOTION: {
- // Optimize case where the current application is unresponsive and the user
- // decides to touch a window in a different application.
- // If the application takes too long to catch up then we drop all events preceding
- // the touch into the other window.
if (shouldPruneInboundQueueLocked(static_cast<MotionEntry&>(*entry))) {
mNextUnblockedEvent = entry;
needWake = true;
@@ -912,7 +989,6 @@
void InputDispatcher::releasePendingEventLocked() {
if (mPendingEvent) {
- resetAnrTimeoutsLocked();
releaseInboundEventLocked(mPendingEvent);
mPendingEvent = nullptr;
}
@@ -1294,109 +1370,29 @@
}
}
-int32_t InputDispatcher::handleTargetsNotReadyLocked(
- nsecs_t currentTime, const EventEntry& entry,
- const sp<InputApplicationHandle>& applicationHandle,
- const sp<InputWindowHandle>& windowHandle, nsecs_t* nextWakeupTime, const char* reason) {
- if (applicationHandle == nullptr && windowHandle == nullptr) {
- if (mInputTargetWaitCause != INPUT_TARGET_WAIT_CAUSE_SYSTEM_NOT_READY) {
- if (DEBUG_FOCUS) {
- ALOGD("Waiting for system to become ready for input. Reason: %s", reason);
- }
- mInputTargetWaitCause = INPUT_TARGET_WAIT_CAUSE_SYSTEM_NOT_READY;
- mInputTargetWaitStartTime = currentTime;
- mInputTargetWaitTimeoutTime = LONG_LONG_MAX;
- mInputTargetWaitTimeoutExpired = false;
- mInputTargetWaitApplicationToken.clear();
- }
- } else {
- if (mInputTargetWaitCause != INPUT_TARGET_WAIT_CAUSE_APPLICATION_NOT_READY) {
- ALOGI("Waiting for application to become ready for input: %s. Reason: %s",
- getApplicationWindowLabel(applicationHandle, windowHandle).c_str(), reason);
- std::chrono::nanoseconds timeout;
- if (windowHandle != nullptr) {
- timeout = windowHandle->getDispatchingTimeout(DEFAULT_INPUT_DISPATCHING_TIMEOUT);
- } else if (applicationHandle != nullptr) {
- timeout =
- applicationHandle->getDispatchingTimeout(DEFAULT_INPUT_DISPATCHING_TIMEOUT);
- } else {
- timeout = DEFAULT_INPUT_DISPATCHING_TIMEOUT;
- }
-
- mInputTargetWaitCause = INPUT_TARGET_WAIT_CAUSE_APPLICATION_NOT_READY;
- mInputTargetWaitStartTime = currentTime;
- mInputTargetWaitTimeoutTime = currentTime + timeout.count();
- mInputTargetWaitTimeoutExpired = false;
- mInputTargetWaitApplicationToken.clear();
-
- if (windowHandle != nullptr) {
- mInputTargetWaitApplicationToken = windowHandle->getApplicationToken();
- }
- if (mInputTargetWaitApplicationToken == nullptr && applicationHandle != nullptr) {
- mInputTargetWaitApplicationToken = applicationHandle->getApplicationToken();
- }
- }
- }
-
- if (mInputTargetWaitTimeoutExpired) {
- return INPUT_EVENT_INJECTION_TIMED_OUT;
- }
-
- if (currentTime >= mInputTargetWaitTimeoutTime) {
- onAnrLocked(currentTime, applicationHandle, windowHandle, entry.eventTime,
- mInputTargetWaitStartTime, reason);
-
- // Force poll loop to wake up immediately on next iteration once we get the
- // ANR response back from the policy.
- *nextWakeupTime = LONG_LONG_MIN;
- return INPUT_EVENT_INJECTION_PENDING;
- } else {
- // Force poll loop to wake up when timeout is due.
- if (mInputTargetWaitTimeoutTime < *nextWakeupTime) {
- *nextWakeupTime = mInputTargetWaitTimeoutTime;
- }
- return INPUT_EVENT_INJECTION_PENDING;
+void InputDispatcher::cancelEventsForAnrLocked(const sp<Connection>& connection) {
+ // We will not be breaking any connections here, even if the policy wants us to abort dispatch.
+ // If the policy decides to close the app, we will get a channel removal event via
+ // unregisterInputChannel, and will clean up the connection that way. We are already not
+ // sending new pointers to the connection when it blocked, but focused events will continue to
+ // pile up.
+ ALOGW("Canceling events for %s because it is unresponsive",
+ connection->inputChannel->getName().c_str());
+ if (connection->status == Connection::STATUS_NORMAL) {
+ CancelationOptions options(CancelationOptions::CANCEL_ALL_EVENTS,
+ "application not responding");
+ synthesizeCancelationEventsForConnectionLocked(connection, options);
}
}
-void InputDispatcher::removeWindowByTokenLocked(const sp<IBinder>& token) {
- for (std::pair<const int32_t, TouchState>& pair : mTouchStatesByDisplay) {
- TouchState& state = pair.second;
- state.removeWindowByToken(token);
- }
-}
-
-void InputDispatcher::resumeAfterTargetsNotReadyTimeoutLocked(
- nsecs_t timeoutExtension, const sp<IBinder>& inputConnectionToken) {
- if (timeoutExtension > 0) {
- // Extend the timeout.
- mInputTargetWaitTimeoutTime = now() + timeoutExtension;
- } else {
- // Give up.
- mInputTargetWaitTimeoutExpired = true;
-
- // Input state will not be realistic. Mark it out of sync.
- sp<Connection> connection = getConnectionLocked(inputConnectionToken);
- if (connection != nullptr) {
- removeWindowByTokenLocked(inputConnectionToken);
-
- if (connection->status == Connection::STATUS_NORMAL) {
- CancelationOptions options(CancelationOptions::CANCEL_ALL_EVENTS,
- "application not responding");
- synthesizeCancelationEventsForConnectionLocked(connection, options);
- }
- }
- }
-}
-
-void InputDispatcher::resetAnrTimeoutsLocked() {
+void InputDispatcher::resetNoFocusedWindowTimeoutLocked() {
if (DEBUG_FOCUS) {
ALOGD("Resetting ANR timeouts.");
}
// Reset input target wait timeout.
- mInputTargetWaitCause = INPUT_TARGET_WAIT_CAUSE_NONE;
- mInputTargetWaitApplicationToken.clear();
+ mNoFocusedWindowTimeoutTime = std::nullopt;
+ mAwaitedFocusedApplication.clear();
}
/**
@@ -1427,6 +1423,36 @@
return displayId == ADISPLAY_ID_NONE ? mFocusedDisplayId : displayId;
}
+bool InputDispatcher::shouldWaitToSendKeyLocked(nsecs_t currentTime,
+ const char* focusedWindowName) {
+ if (mAnrTracker.empty()) {
+ // already processed all events that we waited for
+ mKeyIsWaitingForEventsTimeout = std::nullopt;
+ return false;
+ }
+
+ if (!mKeyIsWaitingForEventsTimeout.has_value()) {
+ // Start the timer
+ ALOGD("Waiting to send key to %s because there are unprocessed events that may cause "
+ "focus to change",
+ focusedWindowName);
+ mKeyIsWaitingForEventsTimeout = currentTime + KEY_WAITING_FOR_EVENTS_TIMEOUT.count();
+ return true;
+ }
+
+ // We still have pending events, and already started the timer
+ if (currentTime < *mKeyIsWaitingForEventsTimeout) {
+ return true; // Still waiting
+ }
+
+ // Waited too long, and some connection still hasn't processed all motions
+ // Just send the key to the focused window
+ ALOGW("Dispatching key to %s even though there are other unprocessed events",
+ focusedWindowName);
+ mKeyIsWaitingForEventsTimeout = std::nullopt;
+ return false;
+}
+
int32_t InputDispatcher::findFocusedWindowTargetsLocked(nsecs_t currentTime,
const EventEntry& entry,
std::vector<InputTarget>& inputTargets,
@@ -1441,31 +1467,70 @@
// If there is no currently focused window and no focused application
// then drop the event.
- if (focusedWindowHandle == nullptr) {
- if (focusedApplicationHandle != nullptr) {
- return handleTargetsNotReadyLocked(currentTime, entry, focusedApplicationHandle,
- nullptr, nextWakeupTime,
- "Waiting because no window has focus but there is "
- "a focused application that may eventually add a "
- "window when it finishes starting up.");
- }
-
- ALOGI("Dropping event because there is no focused window or focused application in display "
- "%" PRId32 ".",
- displayId);
+ if (focusedWindowHandle == nullptr && focusedApplicationHandle == nullptr) {
+ ALOGI("Dropping %s event because there is no focused window or focused application in "
+ "display %" PRId32 ".",
+ EventEntry::typeToString(entry.type), displayId);
return INPUT_EVENT_INJECTION_FAILED;
}
+ // Compatibility behavior: raise ANR if there is a focused application, but no focused window.
+ // Only start counting when we have a focused event to dispatch. The ANR is canceled if we
+ // start interacting with another application via touch (app switch). This code can be removed
+ // if the "no focused window ANR" is moved to the policy. Input doesn't know whether
+ // an app is expected to have a focused window.
+ if (focusedWindowHandle == nullptr && focusedApplicationHandle != nullptr) {
+ if (!mNoFocusedWindowTimeoutTime.has_value()) {
+ // We just discovered that there's no focused window. Start the ANR timer
+ const nsecs_t timeout = focusedApplicationHandle->getDispatchingTimeout(
+ DEFAULT_INPUT_DISPATCHING_TIMEOUT.count());
+ mNoFocusedWindowTimeoutTime = currentTime + timeout;
+ mAwaitedFocusedApplication = focusedApplicationHandle;
+ ALOGW("Waiting because no window has focus but %s may eventually add a "
+ "window when it finishes starting up. Will wait for %" PRId64 "ms",
+ mAwaitedFocusedApplication->getName().c_str(), ns2ms(timeout));
+ *nextWakeupTime = *mNoFocusedWindowTimeoutTime;
+ return INPUT_EVENT_INJECTION_PENDING;
+ } else if (currentTime > *mNoFocusedWindowTimeoutTime) {
+ // Already raised ANR. Drop the event
+ ALOGE("Dropping %s event because there is no focused window",
+ EventEntry::typeToString(entry.type));
+ return INPUT_EVENT_INJECTION_FAILED;
+ } else {
+ // Still waiting for the focused window
+ return INPUT_EVENT_INJECTION_PENDING;
+ }
+ }
+
+ // we have a valid, non-null focused window
+ resetNoFocusedWindowTimeoutLocked();
+
// Check permissions.
if (!checkInjectionPermission(focusedWindowHandle, entry.injectionState)) {
return INPUT_EVENT_INJECTION_PERMISSION_DENIED;
}
- // Check whether the window is ready for more input.
- reason = checkWindowReadyForMoreInputLocked(currentTime, focusedWindowHandle, entry, "focused");
- if (!reason.empty()) {
- return handleTargetsNotReadyLocked(currentTime, entry, focusedApplicationHandle,
- focusedWindowHandle, nextWakeupTime, reason.c_str());
+ if (focusedWindowHandle->getInfo()->paused) {
+ ALOGI("Waiting because %s is paused", focusedWindowHandle->getName().c_str());
+ return INPUT_EVENT_INJECTION_PENDING;
+ }
+
+ // If the event is a key event, then we must wait for all previous events to
+ // complete before delivering it because previous events may have the
+ // side-effect of transferring focus to a different window and we want to
+ // ensure that the following keys are sent to the new window.
+ //
+ // Suppose the user touches a button in a window then immediately presses "A".
+ // If the button causes a pop-up window to appear then we want to ensure that
+ // the "A" key is delivered to the new pop-up window. This is because users
+ // often anticipate pending UI changes when typing on a keyboard.
+ // To obtain this behavior, we must serialize key events with respect to all
+ // prior input events.
+ if (entry.type == EventEntry::Type::KEY) {
+ if (shouldWaitToSendKeyLocked(currentTime, focusedWindowHandle->getName().c_str())) {
+ *nextWakeupTime = *mKeyIsWaitingForEventsTimeout;
+ return INPUT_EVENT_INJECTION_PENDING;
+ }
}
// Success! Output targets.
@@ -1477,6 +1542,32 @@
return INPUT_EVENT_INJECTION_SUCCEEDED;
}
+/**
+ * Given a list of monitors, remove the ones we cannot find a connection for, and the ones
+ * that are currently unresponsive.
+ */
+std::vector<TouchedMonitor> InputDispatcher::selectResponsiveMonitorsLocked(
+ const std::vector<TouchedMonitor>& monitors) const {
+ std::vector<TouchedMonitor> responsiveMonitors;
+ std::copy_if(monitors.begin(), monitors.end(), std::back_inserter(responsiveMonitors),
+ [this](const TouchedMonitor& monitor) REQUIRES(mLock) {
+ sp<Connection> connection = getConnectionLocked(
+ monitor.monitor.inputChannel->getConnectionToken());
+ if (connection == nullptr) {
+ ALOGE("Could not find connection for monitor %s",
+ monitor.monitor.inputChannel->getName().c_str());
+ return false;
+ }
+ if (!connection->responsive) {
+ ALOGW("Unresponsive monitor %s will not get the new gesture",
+ connection->inputChannel->getName().c_str());
+ return false;
+ }
+ return true;
+ });
+ return responsiveMonitors;
+}
+
int32_t InputDispatcher::findTouchedWindowTargetsLocked(nsecs_t currentTime,
const MotionEntry& entry,
std::vector<InputTarget>& inputTargets,
@@ -1592,6 +1683,29 @@
newTouchedWindowHandle = tempTouchState.getFirstForegroundWindowHandle();
}
+ if (newTouchedWindowHandle != nullptr && newTouchedWindowHandle->getInfo()->paused) {
+ ALOGI("Not sending touch event to %s because it is paused",
+ newTouchedWindowHandle->getName().c_str());
+ newTouchedWindowHandle = nullptr;
+ }
+
+ if (newTouchedWindowHandle != nullptr) {
+ sp<Connection> connection = getConnectionLocked(newTouchedWindowHandle->getToken());
+ if (connection == nullptr) {
+ ALOGI("Could not find connection for %s",
+ newTouchedWindowHandle->getName().c_str());
+ newTouchedWindowHandle = nullptr;
+ } else if (!connection->responsive) {
+ // don't send the new touch to an unresponsive window
+ ALOGW("Unresponsive window %s will not get the new gesture at %" PRIu64,
+ newTouchedWindowHandle->getName().c_str(), entry.eventTime);
+ newTouchedWindowHandle = nullptr;
+ }
+ }
+
+ // Also don't send the new touch event to unresponsive gesture monitors
+ newGestureMonitors = selectResponsiveMonitorsLocked(newGestureMonitors);
+
if (newTouchedWindowHandle == nullptr && newGestureMonitors.empty()) {
ALOGI("Dropping event because there is no touchable window or gesture monitor at "
"(%d, %d) in display %" PRId32 ".",
@@ -1758,21 +1872,6 @@
}
}
- // Ensure all touched foreground windows are ready for new input.
- for (const TouchedWindow& touchedWindow : tempTouchState.windows) {
- if (touchedWindow.targetFlags & InputTarget::FLAG_FOREGROUND) {
- // Check whether the window is ready for more input.
- std::string reason =
- checkWindowReadyForMoreInputLocked(currentTime, touchedWindow.windowHandle,
- entry, "touched");
- if (!reason.empty()) {
- return handleTargetsNotReadyLocked(currentTime, entry, nullptr,
- touchedWindow.windowHandle, nextWakeupTime,
- reason.c_str());
- }
- }
- }
-
// If this is the first pointer going down and the touched window has a wallpaper
// then also add the touched wallpaper windows so they are locked in for the duration
// of the touch gesture.
@@ -2049,92 +2148,6 @@
return false;
}
-std::string InputDispatcher::checkWindowReadyForMoreInputLocked(
- nsecs_t currentTime, const sp<InputWindowHandle>& windowHandle,
- const EventEntry& eventEntry, const char* targetType) {
- // If the window is paused then keep waiting.
- if (windowHandle->getInfo()->paused) {
- return StringPrintf("Waiting because the %s window is paused.", targetType);
- }
-
- // If the window's connection is not registered then keep waiting.
- sp<Connection> connection = getConnectionLocked(windowHandle->getToken());
- if (connection == nullptr) {
- return StringPrintf("Waiting because the %s window's input channel is not "
- "registered with the input dispatcher. The window may be in the "
- "process of being removed.",
- targetType);
- }
-
- // If the connection is dead then keep waiting.
- if (connection->status != Connection::STATUS_NORMAL) {
- return StringPrintf("Waiting because the %s window's input connection is %s."
- "The window may be in the process of being removed.",
- targetType, connection->getStatusLabel());
- }
-
- // If the connection is backed up then keep waiting.
- if (connection->inputPublisherBlocked) {
- return StringPrintf("Waiting because the %s window's input channel is full. "
- "Outbound queue length: %zu. Wait queue length: %zu.",
- targetType, connection->outboundQueue.size(),
- connection->waitQueue.size());
- }
-
- // Ensure that the dispatch queues aren't too far backed up for this event.
- if (eventEntry.type == EventEntry::Type::KEY) {
- // If the event is a key event, then we must wait for all previous events to
- // complete before delivering it because previous events may have the
- // side-effect of transferring focus to a different window and we want to
- // ensure that the following keys are sent to the new window.
- //
- // Suppose the user touches a button in a window then immediately presses "A".
- // If the button causes a pop-up window to appear then we want to ensure that
- // the "A" key is delivered to the new pop-up window. This is because users
- // often anticipate pending UI changes when typing on a keyboard.
- // To obtain this behavior, we must serialize key events with respect to all
- // prior input events.
- if (!connection->outboundQueue.empty() || !connection->waitQueue.empty()) {
- return StringPrintf("Waiting to send key event because the %s window has not "
- "finished processing all of the input events that were previously "
- "delivered to it. Outbound queue length: %zu. Wait queue length: "
- "%zu.",
- targetType, connection->outboundQueue.size(),
- connection->waitQueue.size());
- }
- } else {
- // Touch events can always be sent to a window immediately because the user intended
- // to touch whatever was visible at the time. Even if focus changes or a new
- // window appears moments later, the touch event was meant to be delivered to
- // whatever window happened to be on screen at the time.
- //
- // Generic motion events, such as trackball or joystick events are a little trickier.
- // Like key events, generic motion events are delivered to the focused window.
- // Unlike key events, generic motion events don't tend to transfer focus to other
- // windows and it is not important for them to be serialized. So we prefer to deliver
- // generic motion events as soon as possible to improve efficiency and reduce lag
- // through batching.
- //
- // The one case where we pause input event delivery is when the wait queue is piling
- // up with lots of events because the application is not responding.
- // This condition ensures that ANRs are detected reliably.
- if (!connection->waitQueue.empty() &&
- currentTime >=
- connection->waitQueue.front()->deliveryTime + STREAM_AHEAD_EVENT_TIMEOUT) {
- return StringPrintf("Waiting to send non-key event because the %s window has not "
- "finished processing certain input events that were delivered to "
- "it over "
- "%0.1fms ago. Wait queue length: %zu. Wait queue head age: "
- "%0.1fms.",
- targetType, STREAM_AHEAD_EVENT_TIMEOUT * 0.000001f,
- connection->waitQueue.size(),
- (currentTime - connection->waitQueue.front()->deliveryTime) *
- 0.000001f);
- }
- }
- return "";
-}
-
std::string InputDispatcher::getApplicationWindowLabel(
const sp<InputApplicationHandle>& applicationHandle,
const sp<InputWindowHandle>& windowHandle) {
@@ -2534,6 +2547,9 @@
while (connection->status == Connection::STATUS_NORMAL && !connection->outboundQueue.empty()) {
DispatchEntry* dispatchEntry = connection->outboundQueue.front();
dispatchEntry->deliveryTime = currentTime;
+ const nsecs_t timeout =
+ getDispatchingTimeoutLocked(connection->inputChannel->getConnectionToken());
+ dispatchEntry->timeoutTime = currentTime + timeout;
// Publish the event.
status_t status;
@@ -2653,7 +2669,6 @@
"waiting for the application to catch up",
connection->getInputChannelName().c_str());
#endif
- connection->inputPublisherBlocked = true;
}
} else {
ALOGE("channel '%s' ~ Could not publish event due to an unexpected error, "
@@ -2670,6 +2685,10 @@
dispatchEntry));
traceOutboundQueueLength(connection);
connection->waitQueue.push_back(dispatchEntry);
+ if (connection->responsive) {
+ mAnrTracker.insert(dispatchEntry->timeoutTime,
+ connection->inputChannel->getConnectionToken());
+ }
traceWaitQueueLength(connection);
}
}
@@ -2704,8 +2723,6 @@
connection->getInputChannelName().c_str(), seq, toString(handled));
#endif
- connection->inputPublisherBlocked = false;
-
if (connection->status == Connection::STATUS_BROKEN ||
connection->status == Connection::STATUS_ZOMBIE) {
return;
@@ -3861,15 +3878,17 @@
sp<InputApplicationHandle> oldFocusedApplicationHandle =
getValueByKey(mFocusedApplicationHandlesByDisplay, displayId);
+
+ if (oldFocusedApplicationHandle == mAwaitedFocusedApplication &&
+ inputApplicationHandle != oldFocusedApplicationHandle) {
+ resetNoFocusedWindowTimeoutLocked();
+ }
+
if (inputApplicationHandle != nullptr && inputApplicationHandle->updateInfo()) {
if (oldFocusedApplicationHandle != inputApplicationHandle) {
- if (oldFocusedApplicationHandle != nullptr) {
- resetAnrTimeoutsLocked();
- }
mFocusedApplicationHandlesByDisplay[displayId] = inputApplicationHandle;
}
} else if (oldFocusedApplicationHandle != nullptr) {
- resetAnrTimeoutsLocked();
oldFocusedApplicationHandle.clear();
mFocusedApplicationHandlesByDisplay.erase(displayId);
}
@@ -3950,7 +3969,7 @@
if (mDispatchEnabled != enabled || mDispatchFrozen != frozen) {
if (mDispatchFrozen && !frozen) {
- resetAnrTimeoutsLocked();
+ resetNoFocusedWindowTimeoutLocked();
}
if (mDispatchEnabled && !enabled) {
@@ -4090,8 +4109,9 @@
resetKeyRepeatLocked();
releasePendingEventLocked();
drainInboundQueueLocked();
- resetAnrTimeoutsLocked();
+ resetNoFocusedWindowTimeoutLocked();
+ mAnrTracker.clear();
mTouchStatesByDisplay.clear();
mLastHoverWindowHandle.clear();
mReplacedKeys.clear();
@@ -4291,11 +4311,10 @@
for (const auto& pair : mConnectionsByFd) {
const sp<Connection>& connection = pair.second;
dump += StringPrintf(INDENT2 "%i: channelName='%s', windowName='%s', "
- "status=%s, monitor=%s, inputPublisherBlocked=%s\n",
+ "status=%s, monitor=%s, responsive=%s\n",
pair.first, connection->getInputChannelName().c_str(),
connection->getWindowName().c_str(), connection->getStatusLabel(),
- toString(connection->monitor),
- toString(connection->inputPublisherBlocked));
+ toString(connection->monitor), toString(connection->responsive));
if (!connection->outboundQueue.empty()) {
dump += StringPrintf(INDENT3 "OutboundQueue: length=%zu\n",
@@ -4563,6 +4582,7 @@
}
void InputDispatcher::removeConnectionLocked(const sp<Connection>& connection) {
+ mAnrTracker.eraseToken(connection->inputChannel->getConnectionToken());
removeByValue(mConnectionsByFd, connection);
}
@@ -4600,17 +4620,69 @@
postCommandLocked(std::move(commandEntry));
}
-void InputDispatcher::onAnrLocked(nsecs_t currentTime,
- const sp<InputApplicationHandle>& applicationHandle,
- const sp<InputWindowHandle>& windowHandle, nsecs_t eventTime,
- nsecs_t waitStartTime, const char* reason) {
- float dispatchLatency = (currentTime - eventTime) * 0.000001f;
- float waitDuration = (currentTime - waitStartTime) * 0.000001f;
- ALOGI("Application is not responding: %s. "
- "It has been %0.1fms since event, %0.1fms since wait started. Reason: %s",
- getApplicationWindowLabel(applicationHandle, windowHandle).c_str(), dispatchLatency,
- waitDuration, reason);
+void InputDispatcher::onAnrLocked(const sp<Connection>& connection) {
+ // Since we are allowing the policy to extend the timeout, maybe the waitQueue
+ // is already healthy again. Don't raise ANR in this situation
+ if (connection->waitQueue.empty()) {
+ ALOGI("Not raising ANR because the connection %s has recovered",
+ connection->inputChannel->getName().c_str());
+ return;
+ }
+ /**
+ * The "oldestEntry" is the entry that was first sent to the application. That entry, however,
+ * may not be the one that caused the timeout to occur. One possibility is that window timeout
+ * has changed. This could cause newer entries to time out before the already dispatched
+ * entries. In that situation, the newest entries caused ANR. But in all likelihood, the app
+ * processes the events linearly. So providing information about the oldest entry seems to be
+ * most useful.
+ */
+ DispatchEntry* oldestEntry = *connection->waitQueue.begin();
+ const nsecs_t currentWait = now() - oldestEntry->deliveryTime;
+ std::string reason =
+ android::base::StringPrintf("%s is not responding. Waited %" PRId64 "ms for %s",
+ connection->inputChannel->getName().c_str(),
+ ns2ms(currentWait),
+ oldestEntry->eventEntry->getDescription().c_str());
+ updateLastAnrStateLocked(getWindowHandleLocked(connection->inputChannel->getConnectionToken()),
+ reason);
+
+ std::unique_ptr<CommandEntry> commandEntry =
+ std::make_unique<CommandEntry>(&InputDispatcher::doNotifyAnrLockedInterruptible);
+ commandEntry->inputApplicationHandle = nullptr;
+ commandEntry->inputChannel = connection->inputChannel;
+ commandEntry->reason = std::move(reason);
+ postCommandLocked(std::move(commandEntry));
+}
+
+void InputDispatcher::onAnrLocked(const sp<InputApplicationHandle>& application) {
+ std::string reason = android::base::StringPrintf("%s does not have a focused window",
+ application->getName().c_str());
+
+ updateLastAnrStateLocked(application, reason);
+
+ std::unique_ptr<CommandEntry> commandEntry =
+ std::make_unique<CommandEntry>(&InputDispatcher::doNotifyAnrLockedInterruptible);
+ commandEntry->inputApplicationHandle = application;
+ commandEntry->inputChannel = nullptr;
+ commandEntry->reason = std::move(reason);
+ postCommandLocked(std::move(commandEntry));
+}
+
+void InputDispatcher::updateLastAnrStateLocked(const sp<InputWindowHandle>& window,
+ const std::string& reason) {
+ const std::string windowLabel = getApplicationWindowLabel(nullptr, window);
+ updateLastAnrStateLocked(windowLabel, reason);
+}
+
+void InputDispatcher::updateLastAnrStateLocked(const sp<InputApplicationHandle>& application,
+ const std::string& reason) {
+ const std::string windowLabel = getApplicationWindowLabel(application, nullptr);
+ updateLastAnrStateLocked(windowLabel, reason);
+}
+
+void InputDispatcher::updateLastAnrStateLocked(const std::string& windowLabel,
+ const std::string& reason) {
// Capture a record of the InputDispatcher state at the time of the ANR.
time_t t = time(nullptr);
struct tm tm;
@@ -4620,21 +4692,9 @@
mLastAnrState.clear();
mLastAnrState += INDENT "ANR:\n";
mLastAnrState += StringPrintf(INDENT2 "Time: %s\n", timestr);
- mLastAnrState +=
- StringPrintf(INDENT2 "Window: %s\n",
- getApplicationWindowLabel(applicationHandle, windowHandle).c_str());
- mLastAnrState += StringPrintf(INDENT2 "DispatchLatency: %0.1fms\n", dispatchLatency);
- mLastAnrState += StringPrintf(INDENT2 "WaitDuration: %0.1fms\n", waitDuration);
- mLastAnrState += StringPrintf(INDENT2 "Reason: %s\n", reason);
+ mLastAnrState += StringPrintf(INDENT2 "Reason: %s\n", reason.c_str());
+ mLastAnrState += StringPrintf(INDENT2 "Window: %s\n", windowLabel.c_str());
dumpDispatchStateLocked(mLastAnrState);
-
- std::unique_ptr<CommandEntry> commandEntry =
- std::make_unique<CommandEntry>(&InputDispatcher::doNotifyAnrLockedInterruptible);
- commandEntry->inputApplicationHandle = applicationHandle;
- commandEntry->inputChannel =
- windowHandle != nullptr ? getInputChannelLocked(windowHandle->getToken()) : nullptr;
- commandEntry->reason = reason;
- postCommandLocked(std::move(commandEntry));
}
void InputDispatcher::doNotifyConfigurationChangedLockedInterruptible(CommandEntry* commandEntry) {
@@ -4675,13 +4735,50 @@
mLock.lock();
- resumeAfterTargetsNotReadyTimeoutLocked(timeoutExtension, token);
+ if (timeoutExtension > 0) {
+ extendAnrTimeoutsLocked(commandEntry->inputApplicationHandle, token, timeoutExtension);
+ } else {
+ // stop waking up for events in this connection, it is already not responding
+ sp<Connection> connection = getConnectionLocked(token);
+ if (connection == nullptr) {
+ return;
+ }
+ cancelEventsForAnrLocked(connection);
+ }
+}
+
+void InputDispatcher::extendAnrTimeoutsLocked(const sp<InputApplicationHandle>& application,
+ const sp<IBinder>& connectionToken,
+ nsecs_t timeoutExtension) {
+ sp<Connection> connection = getConnectionLocked(connectionToken);
+ if (connection == nullptr) {
+ if (mNoFocusedWindowTimeoutTime.has_value() && application != nullptr) {
+ // Maybe ANR happened because there's no focused window?
+ mNoFocusedWindowTimeoutTime = now() + timeoutExtension;
+ mAwaitedFocusedApplication = application;
+ } else {
+ // It's also possible that the connection already disappeared. No action necessary.
+ }
+ return;
+ }
+
+ ALOGI("Raised ANR, but the policy wants to keep waiting on %s for %" PRId64 "ms longer",
+ connection->inputChannel->getName().c_str(), ns2ms(timeoutExtension));
+
+ connection->responsive = true;
+ const nsecs_t newTimeout = now() + timeoutExtension;
+ for (DispatchEntry* entry : connection->waitQueue) {
+ if (newTimeout >= entry->timeoutTime) {
+ // Already removed old entries when connection was marked unresponsive
+ entry->timeoutTime = newTimeout;
+ mAnrTracker.insert(entry->timeoutTime, connectionToken);
+ }
+ }
}
void InputDispatcher::doInterceptKeyBeforeDispatchingLockedInterruptible(
CommandEntry* commandEntry) {
KeyEntry* entry = commandEntry->keyEntry;
-
KeyEvent event = createKeyEvent(*entry);
mLock.unlock();
@@ -4715,6 +4812,20 @@
mLock.lock();
}
+/**
+ * Connection is responsive if it has no events in the waitQueue that are older than the
+ * current time.
+ */
+static bool isConnectionResponsive(const Connection& connection) {
+ const nsecs_t currentTime = now();
+ for (const DispatchEntry* entry : connection.waitQueue) {
+ if (entry->timeoutTime < currentTime) {
+ return false;
+ }
+ }
+ return true;
+}
+
void InputDispatcher::doDispatchCycleFinishedLockedInterruptible(CommandEntry* commandEntry) {
sp<Connection> connection = commandEntry->connection;
const nsecs_t finishTime = commandEntry->eventTime;
@@ -4727,7 +4838,6 @@
return;
}
DispatchEntry* dispatchEntry = *dispatchEntryIt;
-
const nsecs_t eventDuration = finishTime - dispatchEntry->deliveryTime;
if (eventDuration > SLOW_EVENT_PROCESSING_WARNING_TIMEOUT) {
ALOGI("%s spent %" PRId64 "ms processing %s", connection->getWindowName().c_str(),
@@ -4756,6 +4866,11 @@
if (dispatchEntryIt != connection->waitQueue.end()) {
dispatchEntry = *dispatchEntryIt;
connection->waitQueue.erase(dispatchEntryIt);
+ mAnrTracker.erase(dispatchEntry->timeoutTime,
+ connection->inputChannel->getConnectionToken());
+ if (!connection->responsive) {
+ connection->responsive = isConnectionResponsive(*connection);
+ }
traceWaitQueueLength(connection);
if (restartEvent && connection->status == Connection::STATUS_NORMAL) {
connection->outboundQueue.push_front(dispatchEntry);
diff --git a/services/inputflinger/dispatcher/InputDispatcher.h b/services/inputflinger/dispatcher/InputDispatcher.h
index 1980435..7c2028a 100644
--- a/services/inputflinger/dispatcher/InputDispatcher.h
+++ b/services/inputflinger/dispatcher/InputDispatcher.h
@@ -17,6 +17,7 @@
#ifndef _UI_INPUT_DISPATCHER_H
#define _UI_INPUT_DISPATCHER_H
+#include "AnrTracker.h"
#include "CancelationOptions.h"
#include "Entry.h"
#include "InjectionState.h"
@@ -216,7 +217,6 @@
std::optional<int32_t> findGestureMonitorDisplayByTokenLocked(const sp<IBinder>& token)
REQUIRES(mLock);
-
// Input channels that will receive a copy of all input events sent to the provided display.
std::unordered_map<int32_t, std::vector<Monitor>> mGlobalMonitorsByDisplay GUARDED_BY(mLock);
@@ -274,6 +274,9 @@
bool runCommandsLockedInterruptible() REQUIRES(mLock);
void postCommandLocked(std::unique_ptr<CommandEntry> commandEntry) REQUIRES(mLock);
+ nsecs_t processAnrsLocked() REQUIRES(mLock);
+ nsecs_t getDispatchingTimeoutLocked(const sp<IBinder>& token) REQUIRES(mLock);
+
// Input filter processing.
bool shouldSendKeyToInputFilterLocked(const NotifyKeyArgs* args) REQUIRES(mLock);
bool shouldSendMotionToInputFilterLocked(const NotifyMotionArgs* args) REQUIRES(mLock);
@@ -344,38 +347,53 @@
void logOutboundKeyDetails(const char* prefix, const KeyEntry& entry);
void logOutboundMotionDetails(const char* prefix, const MotionEntry& entry);
- // Keeping track of ANR timeouts.
- enum InputTargetWaitCause {
- INPUT_TARGET_WAIT_CAUSE_NONE,
- INPUT_TARGET_WAIT_CAUSE_SYSTEM_NOT_READY,
- INPUT_TARGET_WAIT_CAUSE_APPLICATION_NOT_READY,
- };
-
- InputTargetWaitCause mInputTargetWaitCause GUARDED_BY(mLock);
- nsecs_t mInputTargetWaitStartTime GUARDED_BY(mLock);
- nsecs_t mInputTargetWaitTimeoutTime GUARDED_BY(mLock);
- bool mInputTargetWaitTimeoutExpired GUARDED_BY(mLock);
- sp<IBinder> mInputTargetWaitApplicationToken GUARDED_BY(mLock);
+ /**
+ * This field is set if there is no focused window, and we have an event that requires
+ * a focused window to be dispatched (for example, a KeyEvent).
+ * When this happens, we will wait until *mNoFocusedWindowTimeoutTime before
+ * dropping the event and raising an ANR for that application.
+ * This is useful if an application is slow to add a focused window.
+ */
+ std::optional<nsecs_t> mNoFocusedWindowTimeoutTime GUARDED_BY(mLock);
bool shouldPruneInboundQueueLocked(const MotionEntry& motionEntry) REQUIRES(mLock);
+ /**
+ * Time to stop waiting for the events to be processed while trying to dispatch a key.
+ * When this time expires, we just send the pending key event to the currently focused window,
+ * without waiting on other events to be processed first.
+ */
+ std::optional<nsecs_t> mKeyIsWaitingForEventsTimeout GUARDED_BY(mLock);
+ bool shouldWaitToSendKeyLocked(nsecs_t currentTime, const char* focusedWindowName)
+ REQUIRES(mLock);
+
+ /**
+ * The focused application at the time when no focused window was present.
+ * Used to raise an ANR when we have no focused window.
+ */
+ sp<InputApplicationHandle> mAwaitedFocusedApplication GUARDED_BY(mLock);
+
+ // Optimization: AnrTracker is used to quickly find which connection is due for a timeout next.
+ // AnrTracker must be kept in-sync with all responsive connection.waitQueues.
+ // If a connection is not responsive, then the entries should not be added to the AnrTracker.
+ // Once a connection becomes unresponsive, its entries are removed from AnrTracker to
+ // prevent unneeded wakeups.
+ AnrTracker mAnrTracker GUARDED_BY(mLock);
+ void extendAnrTimeoutsLocked(const sp<InputApplicationHandle>& application,
+ const sp<IBinder>& connectionToken, nsecs_t timeoutExtension)
+ REQUIRES(mLock);
+
// Contains the last window which received a hover event.
sp<InputWindowHandle> mLastHoverWindowHandle GUARDED_BY(mLock);
- // Finding targets for input events.
- int32_t handleTargetsNotReadyLocked(nsecs_t currentTime, const EventEntry& entry,
- const sp<InputApplicationHandle>& applicationHandle,
- const sp<InputWindowHandle>& windowHandle,
- nsecs_t* nextWakeupTime, const char* reason)
- REQUIRES(mLock);
-
- void removeWindowByTokenLocked(const sp<IBinder>& token) REQUIRES(mLock);
-
- void resumeAfterTargetsNotReadyTimeoutLocked(nsecs_t newTimeout,
- const sp<IBinder>& inputConnectionToken)
- REQUIRES(mLock);
+ void cancelEventsForAnrLocked(const sp<Connection>& connection) REQUIRES(mLock);
nsecs_t getTimeSpentWaitingForApplicationLocked(nsecs_t currentTime) REQUIRES(mLock);
- void resetAnrTimeoutsLocked() REQUIRES(mLock);
+ // If a focused application changes, we should stop counting down the "no focused window" time,
+ // because we will have no way of knowing when the previous application actually added a window.
+ // This also means that we will miss cases like pulling down notification shade when the
+ // focused application does not have a focused window (no ANR will be raised if notification
+ // shade is pulled down while we are counting down the timeout).
+ void resetNoFocusedWindowTimeoutLocked() REQUIRES(mLock);
int32_t getTargetDisplayId(const EventEntry& entry);
int32_t findFocusedWindowTargetsLocked(nsecs_t currentTime, const EventEntry& entry,
@@ -388,6 +406,8 @@
std::vector<TouchedMonitor> findTouchedGestureMonitorsLocked(
int32_t displayId, const std::vector<sp<InputWindowHandle>>& portalWindows) const
REQUIRES(mLock);
+ std::vector<TouchedMonitor> selectResponsiveMonitorsLocked(
+ const std::vector<TouchedMonitor>& gestureMonitors) const REQUIRES(mLock);
void addWindowTargetLocked(const sp<InputWindowHandle>& windowHandle, int32_t targetFlags,
BitSet32 pointerIds, std::vector<InputTarget>& inputTargets)
@@ -406,11 +426,6 @@
std::string getApplicationWindowLabel(const sp<InputApplicationHandle>& applicationHandle,
const sp<InputWindowHandle>& windowHandle);
- std::string checkWindowReadyForMoreInputLocked(nsecs_t currentTime,
- const sp<InputWindowHandle>& windowHandle,
- const EventEntry& eventEntry,
- const char* targetType) REQUIRES(mLock);
-
// Manage the dispatch cycle for a single connection.
// These methods are deliberately not Interruptible because doing all of the work
// with the mutex held makes it easier to ensure that connection invariants are maintained.
@@ -480,9 +495,14 @@
REQUIRES(mLock);
void onFocusChangedLocked(const sp<InputWindowHandle>& oldFocus,
const sp<InputWindowHandle>& newFocus) REQUIRES(mLock);
- void onAnrLocked(nsecs_t currentTime, const sp<InputApplicationHandle>& applicationHandle,
- const sp<InputWindowHandle>& windowHandle, nsecs_t eventTime,
- nsecs_t waitStartTime, const char* reason) REQUIRES(mLock);
+ void onAnrLocked(const sp<Connection>& connection) REQUIRES(mLock);
+ void onAnrLocked(const sp<InputApplicationHandle>& application) REQUIRES(mLock);
+ void updateLastAnrStateLocked(const sp<InputWindowHandle>& window, const std::string& reason)
+ REQUIRES(mLock);
+ void updateLastAnrStateLocked(const sp<InputApplicationHandle>& application,
+ const std::string& reason) REQUIRES(mLock);
+ void updateLastAnrStateLocked(const std::string& windowLabel, const std::string& reason)
+ REQUIRES(mLock);
// Outbound policy interactions.
void doNotifyConfigurationChangedLockedInterruptible(CommandEntry* commandEntry)
diff --git a/services/inputflinger/tests/Android.bp b/services/inputflinger/tests/Android.bp
index 73d2272..a0d2f4f 100644
--- a/services/inputflinger/tests/Android.bp
+++ b/services/inputflinger/tests/Android.bp
@@ -27,6 +27,7 @@
"libinputflinger_defaults",
],
srcs: [
+ "AnrTracker_test.cpp",
"BlockingQueue_test.cpp",
"EventHub_test.cpp",
"TestInputListener.cpp",
diff --git a/services/inputflinger/tests/AnrTracker_test.cpp b/services/inputflinger/tests/AnrTracker_test.cpp
new file mode 100644
index 0000000..b561da1
--- /dev/null
+++ b/services/inputflinger/tests/AnrTracker_test.cpp
@@ -0,0 +1,167 @@
+/*
+ * Copyright (C) 2020 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 "../AnrTracker.h"
+
+#include <binder/Binder.h>
+#include <gtest/gtest.h>
+
+namespace android {
+
+namespace inputdispatcher {
+
+// --- AnrTrackerTest ---
+
+/**
+ * Add a single entry and ensure it's returned as first, even if the token isn't valid
+ */
+TEST(AnrTrackerTest, SingleEntry_First) {
+ AnrTracker tracker;
+
+ tracker.insert(1, nullptr);
+
+ ASSERT_EQ(1, tracker.firstTimeout());
+ ASSERT_EQ(tracker.firstToken(), nullptr);
+}
+
+TEST(AnrTrackerTest, MultipleEntries_RemoveToken) {
+ AnrTracker tracker;
+
+ sp<IBinder> token1 = new BBinder();
+ sp<IBinder> token2 = new BBinder();
+
+ tracker.insert(1, token1);
+ tracker.insert(2, token2);
+ tracker.insert(3, token1);
+ tracker.insert(4, token2);
+ tracker.insert(5, token1);
+
+ tracker.eraseToken(token1);
+
+ ASSERT_EQ(2, tracker.firstTimeout());
+}
+
+TEST(AnrTrackerTest, AddAndRemove_Empty) {
+ AnrTracker tracker;
+
+ ASSERT_TRUE(tracker.empty());
+
+ tracker.insert(1, nullptr);
+ ASSERT_FALSE(tracker.empty());
+
+ tracker.erase(1, nullptr);
+ ASSERT_TRUE(tracker.empty());
+}
+
+TEST(AnrTrackerTest, Clear) {
+ AnrTracker tracker;
+
+ tracker.insert(1, nullptr);
+ tracker.clear();
+ ASSERT_TRUE(tracker.empty());
+}
+
+TEST(AnrTrackerTest, SingleToken_MaintainsOrder) {
+ AnrTracker tracker;
+
+ ASSERT_TRUE(tracker.empty());
+
+ tracker.insert(2, nullptr);
+ tracker.insert(5, nullptr);
+ tracker.insert(0, nullptr);
+
+ ASSERT_EQ(0, tracker.firstTimeout());
+ ASSERT_EQ(nullptr, tracker.firstToken());
+}
+
+TEST(AnrTrackerTest, MultipleTokens_MaintainsOrder) {
+ AnrTracker tracker;
+
+ sp<IBinder> token1 = new BBinder();
+ sp<IBinder> token2 = new BBinder();
+
+ tracker.insert(2, token1);
+ tracker.insert(5, token2);
+ tracker.insert(0, token2);
+
+ ASSERT_EQ(0, tracker.firstTimeout());
+ ASSERT_EQ(token2, tracker.firstToken());
+}
+
+TEST(AnrTrackerTest, MultipleTokens_IdenticalTimes) {
+ AnrTracker tracker;
+
+ sp<IBinder> token1 = new BBinder();
+ sp<IBinder> token2 = new BBinder();
+
+ tracker.insert(2, token1);
+ tracker.insert(2, token2);
+ tracker.insert(10, token2);
+
+ ASSERT_EQ(2, tracker.firstTimeout());
+ // Doesn't matter which token is returned - both are valid results
+ ASSERT_TRUE(token1 == tracker.firstToken() || token2 == tracker.firstToken());
+}
+
+TEST(AnrTrackerTest, MultipleTokens_IdenticalTimesRemove) {
+ AnrTracker tracker;
+
+ sp<IBinder> token1 = new BBinder();
+ sp<IBinder> token2 = new BBinder();
+
+ tracker.insert(2, token1);
+ tracker.insert(2, token2);
+ tracker.insert(10, token2);
+
+ tracker.erase(2, token2);
+
+ ASSERT_EQ(2, tracker.firstTimeout());
+ ASSERT_EQ(token1, tracker.firstToken());
+}
+
+TEST(AnrTrackerTest, Empty_DoesntCrash) {
+ AnrTracker tracker;
+
+ ASSERT_TRUE(tracker.empty());
+
+ ASSERT_EQ(LONG_LONG_MAX, tracker.firstTimeout());
+ // Can't call firstToken() if tracker.empty()
+}
+
+TEST(AnrTrackerTest, RemoveInvalidItem_DoesntCrash) {
+ AnrTracker tracker;
+
+ tracker.insert(1, nullptr);
+
+ // Remove with non-matching timestamp
+ tracker.erase(2, nullptr);
+ ASSERT_EQ(1, tracker.firstTimeout());
+ ASSERT_EQ(nullptr, tracker.firstToken());
+
+ // Remove with non-matching token
+ tracker.erase(1, new BBinder());
+ ASSERT_EQ(1, tracker.firstTimeout());
+ ASSERT_EQ(nullptr, tracker.firstToken());
+
+ // Remove with both non-matching
+ tracker.erase(2, new BBinder());
+ ASSERT_EQ(1, tracker.firstTimeout());
+ ASSERT_EQ(nullptr, tracker.firstToken());
+}
+
+} // namespace inputdispatcher
+
+} // namespace android
diff --git a/services/inputflinger/tests/InputDispatcher_test.cpp b/services/inputflinger/tests/InputDispatcher_test.cpp
index 13e8354..1a133dc 100644
--- a/services/inputflinger/tests/InputDispatcher_test.cpp
+++ b/services/inputflinger/tests/InputDispatcher_test.cpp
@@ -126,6 +126,14 @@
void assertNotifyAnrWasCalled(std::chrono::nanoseconds timeout,
const sp<InputApplicationHandle>& expectedApplication,
const sp<IBinder>& expectedToken) {
+ std::pair<sp<InputApplicationHandle>, sp<IBinder>> anrData;
+ ASSERT_NO_FATAL_FAILURE(anrData = getNotifyAnrData(timeout));
+ ASSERT_EQ(expectedApplication, anrData.first);
+ ASSERT_EQ(expectedToken, anrData.second);
+ }
+
+ std::pair<sp<InputApplicationHandle>, sp<IBinder>> getNotifyAnrData(
+ std::chrono::nanoseconds timeout) {
const std::chrono::time_point start = std::chrono::steady_clock::now();
std::unique_lock lock(mLock);
std::chrono::duration timeToWait = timeout + 100ms; // provide some slack
@@ -136,16 +144,33 @@
// before checking if ANR was called.
// Since dispatcher is not guaranteed to call notifyAnr right away, we need to provide
// it some time to act. 100ms seems reasonable.
- mNotifyAnr.wait_for(lock, timeToWait,
- [this]() REQUIRES(mLock) { return mNotifyAnrWasCalled; });
+ mNotifyAnr.wait_for(lock, timeToWait, [this]() REQUIRES(mLock) {
+ return !mAnrApplications.empty() && !mAnrWindowTokens.empty();
+ });
const std::chrono::duration waited = std::chrono::steady_clock::now() - start;
- ASSERT_TRUE(mNotifyAnrWasCalled);
+ if (mAnrApplications.empty() || mAnrWindowTokens.empty()) {
+ ADD_FAILURE() << "Did not receive ANR callback";
+ }
// Ensure that the ANR didn't get raised too early. We can't be too strict here because
// the dispatcher started counting before this function was called
- ASSERT_TRUE(timeout - 100ms < waited); // check (waited < timeout + 100ms) done by wait_for
- mNotifyAnrWasCalled = false;
- ASSERT_EQ(expectedApplication, mLastAnrApplication);
- ASSERT_EQ(expectedToken, mLastAnrWindowToken);
+ if (std::chrono::abs(timeout - waited) > 100ms) {
+ ADD_FAILURE() << "ANR was raised too early or too late. Expected "
+ << std::chrono::duration_cast<std::chrono::milliseconds>(timeout).count()
+ << "ms, but waited "
+ << std::chrono::duration_cast<std::chrono::milliseconds>(waited).count()
+ << "ms instead";
+ }
+ std::pair<sp<InputApplicationHandle>, sp<IBinder>> result =
+ std::make_pair(mAnrApplications.front(), mAnrWindowTokens.front());
+ mAnrApplications.pop();
+ mAnrWindowTokens.pop();
+ return result;
+ }
+
+ void assertNotifyAnrWasNotCalled() {
+ std::scoped_lock lock(mLock);
+ ASSERT_TRUE(mAnrApplications.empty());
+ ASSERT_TRUE(mAnrWindowTokens.empty());
}
void setKeyRepeatConfiguration(nsecs_t timeout, nsecs_t delay) {
@@ -153,6 +178,8 @@
mConfig.keyRepeatDelay = delay;
}
+ void setAnrTimeout(std::chrono::nanoseconds timeout) { mAnrTimeout = timeout; }
+
private:
std::mutex mLock;
std::unique_ptr<InputEvent> mFilteredEvent GUARDED_BY(mLock);
@@ -161,9 +188,8 @@
std::optional<NotifySwitchArgs> mLastNotifySwitch GUARDED_BY(mLock);
// ANR handling
- bool mNotifyAnrWasCalled GUARDED_BY(mLock) = false;
- sp<InputApplicationHandle> mLastAnrApplication GUARDED_BY(mLock);
- sp<IBinder> mLastAnrWindowToken GUARDED_BY(mLock);
+ std::queue<sp<InputApplicationHandle>> mAnrApplications GUARDED_BY(mLock);
+ std::queue<sp<IBinder>> mAnrWindowTokens GUARDED_BY(mLock);
std::condition_variable mNotifyAnr;
std::chrono::nanoseconds mAnrTimeout = 0ms;
@@ -175,9 +201,8 @@
virtual nsecs_t notifyAnr(const sp<InputApplicationHandle>& application,
const sp<IBinder>& windowToken, const std::string&) override {
std::scoped_lock lock(mLock);
- mLastAnrApplication = application;
- mLastAnrWindowToken = windowToken;
- mNotifyAnrWasCalled = true;
+ mAnrApplications.push(application);
+ mAnrWindowTokens.push(windowToken);
mNotifyAnr.notify_all();
return mAnrTimeout.count();
}
@@ -643,7 +668,7 @@
ASSERT_NE(nullptr, event) << mName.c_str()
<< ": consumer should have returned non-NULL event.";
ASSERT_EQ(expectedEventType, event->getType())
- << mName.c_str() << "expected " << inputEventTypeToString(expectedEventType)
+ << mName.c_str() << " expected " << inputEventTypeToString(expectedEventType)
<< " event, got " << inputEventTypeToString(event->getType()) << " event";
EXPECT_EQ(expectedDisplayId, event->getDisplayId());
@@ -688,9 +713,24 @@
void assertNoEvents() {
InputEvent* event = consume();
- ASSERT_EQ(nullptr, event)
- << mName.c_str()
- << ": should not have received any events, so consume() should return NULL";
+ if (event == nullptr) {
+ return;
+ }
+ if (event->getType() == AINPUT_EVENT_TYPE_KEY) {
+ KeyEvent& keyEvent = static_cast<KeyEvent&>(*event);
+ ADD_FAILURE() << "Received key event "
+ << KeyEvent::actionToString(keyEvent.getAction());
+ } else if (event->getType() == AINPUT_EVENT_TYPE_MOTION) {
+ MotionEvent& motionEvent = static_cast<MotionEvent&>(*event);
+ ADD_FAILURE() << "Received motion event "
+ << MotionEvent::actionToString(motionEvent.getAction());
+ } else if (event->getType() == AINPUT_EVENT_TYPE_FOCUS) {
+ FocusEvent& focusEvent = static_cast<FocusEvent&>(*event);
+ ADD_FAILURE() << "Received focus event, hasFocus = "
+ << (focusEvent.getHasFocus() ? "true" : "false");
+ }
+ FAIL() << mName.c_str()
+ << ": should not have received any events, so consume() should return NULL";
}
sp<IBinder> getToken() { return mConsumer->getChannel()->getConnectionToken(); }
@@ -754,6 +794,8 @@
mInfo.dispatchingTimeout = timeout.count();
}
+ void setPaused(bool paused) { mInfo.paused = paused; }
+
void setFrame(const Rect& frame) {
mInfo.frameLeft = frame.left;
mInfo.frameTop = frame.top;
@@ -775,6 +817,10 @@
expectedFlags);
}
+ void consumeKeyUp(int32_t expectedDisplayId, int32_t expectedFlags = 0) {
+ consumeEvent(AINPUT_EVENT_TYPE_KEY, AKEY_EVENT_ACTION_UP, expectedDisplayId, expectedFlags);
+ }
+
void consumeMotionCancel(int32_t expectedDisplayId = ADISPLAY_ID_DEFAULT,
int32_t expectedFlags = 0) {
consumeEvent(AINPUT_EVENT_TYPE_MOTION, AMOTION_EVENT_ACTION_CANCEL, expectedDisplayId,
@@ -826,12 +872,12 @@
expectedFlags);
}
- std::optional<uint32_t> receiveEvent() {
+ std::optional<uint32_t> receiveEvent(InputEvent** outEvent = nullptr) {
if (mInputReceiver == nullptr) {
ADD_FAILURE() << "Invalid receive event on window with no receiver";
return std::nullopt;
}
- return mInputReceiver->receiveEvent();
+ return mInputReceiver->receiveEvent(outEvent);
}
void finishEvent(uint32_t sequenceNum) {
@@ -865,7 +911,9 @@
std::atomic<int32_t> FakeWindowHandle::sId{1};
static int32_t injectKey(const sp<InputDispatcher>& dispatcher, int32_t action, int32_t repeatCount,
- int32_t displayId = ADISPLAY_ID_NONE) {
+ int32_t displayId = ADISPLAY_ID_NONE,
+ int32_t syncMode = INPUT_EVENT_INJECTION_SYNC_WAIT_FOR_RESULT,
+ std::chrono::milliseconds injectionTimeout = INJECT_EVENT_TIMEOUT) {
KeyEvent event;
nsecs_t currentTime = systemTime(SYSTEM_TIME_MONOTONIC);
@@ -875,10 +923,9 @@
repeatCount, currentTime, currentTime);
// Inject event until dispatch out.
- return dispatcher->injectInputEvent(
- &event,
- INJECTOR_PID, INJECTOR_UID, INPUT_EVENT_INJECTION_SYNC_WAIT_FOR_RESULT,
- INJECT_EVENT_TIMEOUT, POLICY_FLAG_FILTERED | POLICY_FLAG_PASS_TO_USER);
+ return dispatcher->injectInputEvent(&event, INJECTOR_PID, INJECTOR_UID, syncMode,
+ injectionTimeout,
+ POLICY_FLAG_FILTERED | POLICY_FLAG_PASS_TO_USER);
}
static int32_t injectKeyDown(const sp<InputDispatcher>& dispatcher,
@@ -886,11 +933,19 @@
return injectKey(dispatcher, AKEY_EVENT_ACTION_DOWN, /* repeatCount */ 0, displayId);
}
+static int32_t injectKeyUp(const sp<InputDispatcher>& dispatcher,
+ int32_t displayId = ADISPLAY_ID_NONE) {
+ return injectKey(dispatcher, AKEY_EVENT_ACTION_UP, /* repeatCount */ 0, displayId);
+}
+
static int32_t injectMotionEvent(
const sp<InputDispatcher>& dispatcher, int32_t action, int32_t source, int32_t displayId,
const PointF& position,
const PointF& cursorPosition = {AMOTION_EVENT_INVALID_CURSOR_POSITION,
- AMOTION_EVENT_INVALID_CURSOR_POSITION}) {
+ AMOTION_EVENT_INVALID_CURSOR_POSITION},
+ std::chrono::milliseconds injectionTimeout = INJECT_EVENT_TIMEOUT,
+ int32_t injectionMode = INPUT_EVENT_INJECTION_SYNC_WAIT_FOR_RESULT,
+ nsecs_t eventTime = systemTime(SYSTEM_TIME_MONOTONIC)) {
MotionEvent event;
PointerProperties pointerProperties[1];
PointerCoords pointerCoords[1];
@@ -903,7 +958,6 @@
pointerCoords[0].setAxisValue(AMOTION_EVENT_AXIS_X, position.x);
pointerCoords[0].setAxisValue(AMOTION_EVENT_AXIS_Y, position.y);
- nsecs_t currentTime = systemTime(SYSTEM_TIME_MONOTONIC);
// Define a valid motion down event.
event.initialize(InputEvent::nextId(), DEVICE_ID, source, displayId, INVALID_HMAC, action,
/* actionButton */ 0,
@@ -911,14 +965,13 @@
/* edgeFlags */ 0, AMETA_NONE, /* buttonState */ 0, MotionClassification::NONE,
/* xScale */ 1, /* yScale */ 1, /* xOffset */ 0, /* yOffset */ 0,
/* xPrecision */ 0, /* yPrecision */ 0, cursorPosition.x, cursorPosition.y,
- currentTime, currentTime,
+ eventTime, eventTime,
/*pointerCount*/ 1, pointerProperties, pointerCoords);
// Inject event until dispatch out.
- return dispatcher->injectInputEvent(
- &event,
- INJECTOR_PID, INJECTOR_UID, INPUT_EVENT_INJECTION_SYNC_WAIT_FOR_RESULT,
- INJECT_EVENT_TIMEOUT, POLICY_FLAG_FILTERED | POLICY_FLAG_PASS_TO_USER);
+ return dispatcher->injectInputEvent(&event, INJECTOR_PID, INJECTOR_UID, injectionMode,
+ injectionTimeout,
+ POLICY_FLAG_FILTERED | POLICY_FLAG_PASS_TO_USER);
}
static int32_t injectMotionDown(const sp<InputDispatcher>& dispatcher, int32_t source,
@@ -1429,6 +1482,10 @@
expectedDisplayId, expectedFlags);
}
+ std::optional<int32_t> receiveEvent() { return mInputReceiver->receiveEvent(); }
+
+ void finishEvent(uint32_t consumeSeq) { return mInputReceiver->finishEvent(consumeSeq); }
+
void consumeMotionDown(int32_t expectedDisplayId, int32_t expectedFlags = 0) {
mInputReceiver->consumeEvent(AINPUT_EVENT_TYPE_MOTION, AMOTION_EVENT_ACTION_DOWN,
expectedDisplayId, expectedFlags);
@@ -1507,6 +1564,21 @@
monitor.consumeMotionUp(ADISPLAY_ID_DEFAULT);
}
+TEST_F(InputDispatcherTest, UnresponsiveGestureMonitor_GetsAnr) {
+ FakeMonitorReceiver monitor =
+ FakeMonitorReceiver(mDispatcher, "Gesture monitor", ADISPLAY_ID_DEFAULT,
+ true /*isGestureMonitor*/);
+
+ ASSERT_EQ(INPUT_EVENT_INJECTION_SUCCEEDED,
+ injectMotionDown(mDispatcher, AINPUT_SOURCE_TOUCHSCREEN, ADISPLAY_ID_DEFAULT));
+ std::optional<uint32_t> consumeSeq = monitor.receiveEvent();
+ ASSERT_TRUE(consumeSeq);
+
+ mFakePolicy->assertNotifyAnrWasCalled(DISPATCHING_TIMEOUT, nullptr, monitor.getToken());
+ monitor.finishEvent(*consumeSeq);
+ ASSERT_TRUE(mDispatcher->waitForIdle());
+}
+
TEST_F(InputDispatcherTest, TestMoveEvent) {
sp<FakeApplicationHandle> application = new FakeApplicationHandle();
sp<FakeWindowHandle> window =
@@ -2329,23 +2401,40 @@
}
};
+// Send a tap and respond, which should not cause an ANR.
+TEST_F(InputDispatcherSingleWindowAnr, WhenTouchIsConsumed_NoAnr) {
+ tapOnWindow();
+ mWindow->consumeMotionDown();
+ mWindow->consumeMotionUp();
+ ASSERT_TRUE(mDispatcher->waitForIdle());
+ mFakePolicy->assertNotifyAnrWasNotCalled();
+}
+
+// Send a regular key and respond, which should not cause an ANR.
+TEST_F(InputDispatcherSingleWindowAnr, WhenKeyIsConsumed_NoAnr) {
+ ASSERT_EQ(INPUT_EVENT_INJECTION_SUCCEEDED, injectKeyDown(mDispatcher));
+ mWindow->consumeKeyDown(ADISPLAY_ID_NONE);
+ ASSERT_TRUE(mDispatcher->waitForIdle());
+ mFakePolicy->assertNotifyAnrWasNotCalled();
+}
+
// Send an event to the app and have the app not respond right away.
-// Make sure that ANR is raised
+// When ANR is raised, policy will tell the dispatcher to cancel the events for that window.
+// So InputDispatcher will enqueue ACTION_CANCEL event as well.
TEST_F(InputDispatcherSingleWindowAnr, OnPointerDown_BasicAnr) {
ASSERT_EQ(INPUT_EVENT_INJECTION_SUCCEEDED,
injectMotionDown(mDispatcher, AINPUT_SOURCE_TOUCHSCREEN, ADISPLAY_ID_DEFAULT,
WINDOW_LOCATION));
- // Also, overwhelm the socket to make sure ANR starts
- for (size_t i = 0; i < 100; i++) {
- injectMotionEvent(mDispatcher, AMOTION_EVENT_ACTION_MOVE, AINPUT_SOURCE_TOUCHSCREEN,
- ADISPLAY_ID_DEFAULT, {WINDOW_LOCATION.x, WINDOW_LOCATION.y + i});
- }
-
std::optional<uint32_t> sequenceNum = mWindow->receiveEvent(); // ACTION_DOWN
ASSERT_TRUE(sequenceNum);
const std::chrono::duration timeout = mWindow->getDispatchingTimeout(DISPATCHING_TIMEOUT);
mFakePolicy->assertNotifyAnrWasCalled(timeout, nullptr /*application*/, mWindow->getToken());
+
+ // The remaining lines are not really needed for the test, but kept as a sanity check
+ mWindow->finishEvent(*sequenceNum);
+ mWindow->consumeEvent(AINPUT_EVENT_TYPE_MOTION, AMOTION_EVENT_ACTION_CANCEL,
+ ADISPLAY_ID_DEFAULT, 0 /*flags*/);
ASSERT_TRUE(mDispatcher->waitForIdle());
}
@@ -2355,14 +2444,591 @@
ASSERT_EQ(INPUT_EVENT_INJECTION_SUCCEEDED, injectKeyDown(mDispatcher));
std::optional<uint32_t> sequenceNum = mWindow->receiveEvent();
ASSERT_TRUE(sequenceNum);
-
- // Start ANR process by sending a 2nd key, which would trigger the check for whether
- // waitQueue is empty
- injectKey(mDispatcher, AKEY_EVENT_ACTION_DOWN, /* repeatCount */ 1);
-
const std::chrono::duration timeout = mWindow->getDispatchingTimeout(DISPATCHING_TIMEOUT);
- mFakePolicy->assertNotifyAnrWasCalled(timeout, mApplication, mWindow->getToken());
+ mFakePolicy->assertNotifyAnrWasCalled(timeout, nullptr /*application*/, mWindow->getToken());
ASSERT_TRUE(mDispatcher->waitForIdle());
}
+// We have a focused application, but no focused window
+TEST_F(InputDispatcherSingleWindowAnr, FocusedApplication_NoFocusedWindow) {
+ mWindow->setFocus(false);
+ mDispatcher->setInputWindows({{ADISPLAY_ID_DEFAULT, {mWindow}}});
+ mWindow->consumeFocusEvent(false);
+
+ // taps on the window work as normal
+ ASSERT_EQ(INPUT_EVENT_INJECTION_SUCCEEDED,
+ injectMotionDown(mDispatcher, AINPUT_SOURCE_TOUCHSCREEN, ADISPLAY_ID_DEFAULT,
+ WINDOW_LOCATION));
+ ASSERT_NO_FATAL_FAILURE(mWindow->consumeMotionDown());
+ mDispatcher->waitForIdle();
+ mFakePolicy->assertNotifyAnrWasNotCalled();
+
+ // Once a focused event arrives, we get an ANR for this application
+ // We specify the injection timeout to be smaller than the application timeout, to ensure that
+ // injection times out (instead of failing).
+ const int32_t result =
+ injectKey(mDispatcher, AKEY_EVENT_ACTION_DOWN, 0 /* repeatCount */, ADISPLAY_ID_DEFAULT,
+ INPUT_EVENT_INJECTION_SYNC_WAIT_FOR_RESULT, 10ms);
+ ASSERT_EQ(INPUT_EVENT_INJECTION_TIMED_OUT, result);
+ const std::chrono::duration timeout = mApplication->getDispatchingTimeout(DISPATCHING_TIMEOUT);
+ mFakePolicy->assertNotifyAnrWasCalled(timeout, mApplication, nullptr /*windowToken*/);
+ ASSERT_TRUE(mDispatcher->waitForIdle());
+}
+
+// We have a focused application, but no focused window
+// If the policy wants to keep waiting on the focused window to be added, make sure
+// that this timeout extension is honored and ANR is raised again.
+TEST_F(InputDispatcherSingleWindowAnr, NoFocusedWindow_ExtendsAnr) {
+ mWindow->setFocus(false);
+ mDispatcher->setInputWindows({{ADISPLAY_ID_DEFAULT, {mWindow}}});
+ mWindow->consumeFocusEvent(false);
+ const std::chrono::duration timeout = 5ms;
+ mFakePolicy->setAnrTimeout(timeout);
+
+ // Once a focused event arrives, we get an ANR for this application
+ // We specify the injection timeout to be smaller than the application timeout, to ensure that
+ // injection times out (instead of failing).
+ const int32_t result =
+ injectKey(mDispatcher, AKEY_EVENT_ACTION_DOWN, 0 /* repeatCount */, ADISPLAY_ID_DEFAULT,
+ INPUT_EVENT_INJECTION_SYNC_WAIT_FOR_RESULT, 10ms);
+ ASSERT_EQ(INPUT_EVENT_INJECTION_TIMED_OUT, result);
+ const std::chrono::duration appTimeout =
+ mApplication->getDispatchingTimeout(DISPATCHING_TIMEOUT);
+ mFakePolicy->assertNotifyAnrWasCalled(appTimeout, mApplication, nullptr /*windowToken*/);
+
+ // After the extended time has passed, ANR should be raised again
+ mFakePolicy->assertNotifyAnrWasCalled(timeout, mApplication, nullptr /*windowToken*/);
+
+ // If we stop extending the timeout, dispatcher should go to idle.
+ // Another ANR may be raised during this time
+ mFakePolicy->setAnrTimeout(0ms);
+ ASSERT_TRUE(mDispatcher->waitForIdle());
+}
+
+// We have a focused application, but no focused window
+TEST_F(InputDispatcherSingleWindowAnr, NoFocusedWindow_DropsFocusedEvents) {
+ mWindow->setFocus(false);
+ mDispatcher->setInputWindows({{ADISPLAY_ID_DEFAULT, {mWindow}}});
+ mWindow->consumeFocusEvent(false);
+
+ // Once a focused event arrives, we get an ANR for this application
+ const int32_t result =
+ injectKey(mDispatcher, AKEY_EVENT_ACTION_DOWN, 0 /* repeatCount */, ADISPLAY_ID_DEFAULT,
+ INPUT_EVENT_INJECTION_SYNC_WAIT_FOR_RESULT, 10ms);
+ ASSERT_EQ(INPUT_EVENT_INJECTION_TIMED_OUT, result);
+
+ const std::chrono::duration timeout = mApplication->getDispatchingTimeout(DISPATCHING_TIMEOUT);
+ mFakePolicy->assertNotifyAnrWasCalled(timeout, mApplication, nullptr /*windowToken*/);
+
+ // Future focused events get dropped right away
+ ASSERT_EQ(INPUT_EVENT_INJECTION_FAILED, injectKeyDown(mDispatcher));
+ ASSERT_TRUE(mDispatcher->waitForIdle());
+ mWindow->assertNoEvents();
+}
+
+/**
+ * Ensure that the implementation is valid. Since we are using multiset to keep track of the
+ * ANR timeouts, we are allowing entries with identical timestamps in the same connection.
+ * If we process 1 of the events, but ANR on the second event with the same timestamp,
+ * the ANR mechanism should still work.
+ *
+ * In this test, we are injecting DOWN and UP events with the same timestamps, and acknowledging the
+ * DOWN event, while not responding on the second one.
+ */
+TEST_F(InputDispatcherSingleWindowAnr, Anr_HandlesEventsWithIdenticalTimestamps) {
+ nsecs_t currentTime = systemTime(SYSTEM_TIME_MONOTONIC);
+ injectMotionEvent(mDispatcher, AMOTION_EVENT_ACTION_DOWN, AINPUT_SOURCE_TOUCHSCREEN,
+ ADISPLAY_ID_DEFAULT, WINDOW_LOCATION,
+ {AMOTION_EVENT_INVALID_CURSOR_POSITION,
+ AMOTION_EVENT_INVALID_CURSOR_POSITION},
+ 500ms, INPUT_EVENT_INJECTION_SYNC_WAIT_FOR_RESULT, currentTime);
+
+ // Now send ACTION_UP, with identical timestamp
+ injectMotionEvent(mDispatcher, AMOTION_EVENT_ACTION_UP, AINPUT_SOURCE_TOUCHSCREEN,
+ ADISPLAY_ID_DEFAULT, WINDOW_LOCATION,
+ {AMOTION_EVENT_INVALID_CURSOR_POSITION,
+ AMOTION_EVENT_INVALID_CURSOR_POSITION},
+ 500ms, INPUT_EVENT_INJECTION_SYNC_WAIT_FOR_RESULT, currentTime);
+
+ // We have now sent down and up. Let's consume first event and then ANR on the second.
+ mWindow->consumeMotionDown(ADISPLAY_ID_DEFAULT);
+ const std::chrono::duration timeout = mWindow->getDispatchingTimeout(DISPATCHING_TIMEOUT);
+ mFakePolicy->assertNotifyAnrWasCalled(timeout, nullptr /*application*/, mWindow->getToken());
+}
+
+// If an app is not responding to a key event, gesture monitors should continue to receive
+// new motion events
+TEST_F(InputDispatcherSingleWindowAnr, GestureMonitors_ReceiveEventsDuringAppAnrOnKey) {
+ FakeMonitorReceiver monitor =
+ FakeMonitorReceiver(mDispatcher, "Gesture monitor", ADISPLAY_ID_DEFAULT,
+ true /*isGestureMonitor*/);
+
+ ASSERT_EQ(INPUT_EVENT_INJECTION_SUCCEEDED, injectKeyDown(mDispatcher, ADISPLAY_ID_DEFAULT));
+ mWindow->consumeKeyDown(ADISPLAY_ID_DEFAULT);
+ ASSERT_EQ(INPUT_EVENT_INJECTION_SUCCEEDED, injectKeyUp(mDispatcher, ADISPLAY_ID_DEFAULT));
+
+ // Stuck on the ACTION_UP
+ const std::chrono::duration timeout = mWindow->getDispatchingTimeout(DISPATCHING_TIMEOUT);
+ mFakePolicy->assertNotifyAnrWasCalled(timeout, nullptr, mWindow->getToken());
+
+ // New tap will go to the gesture monitor, but not to the window
+ tapOnWindow();
+ monitor.consumeMotionDown(ADISPLAY_ID_DEFAULT);
+ monitor.consumeMotionUp(ADISPLAY_ID_DEFAULT);
+
+ mWindow->consumeKeyUp(ADISPLAY_ID_DEFAULT); // still the previous motion
+ mDispatcher->waitForIdle();
+ mWindow->assertNoEvents();
+ monitor.assertNoEvents();
+}
+
+// If an app is not responding to a motion event, gesture monitors should continue to receive
+// new motion events
+TEST_F(InputDispatcherSingleWindowAnr, GestureMonitors_ReceiveEventsDuringAppAnrOnMotion) {
+ FakeMonitorReceiver monitor =
+ FakeMonitorReceiver(mDispatcher, "Gesture monitor", ADISPLAY_ID_DEFAULT,
+ true /*isGestureMonitor*/);
+
+ tapOnWindow();
+ monitor.consumeMotionDown(ADISPLAY_ID_DEFAULT);
+ monitor.consumeMotionUp(ADISPLAY_ID_DEFAULT);
+
+ mWindow->consumeMotionDown();
+ // Stuck on the ACTION_UP
+ const std::chrono::duration timeout = mWindow->getDispatchingTimeout(DISPATCHING_TIMEOUT);
+ mFakePolicy->assertNotifyAnrWasCalled(timeout, nullptr, mWindow->getToken());
+
+ // New tap will go to the gesture monitor, but not to the window
+ tapOnWindow();
+ monitor.consumeMotionDown(ADISPLAY_ID_DEFAULT);
+ monitor.consumeMotionUp(ADISPLAY_ID_DEFAULT);
+
+ mWindow->consumeMotionUp(ADISPLAY_ID_DEFAULT); // still the previous motion
+ mDispatcher->waitForIdle();
+ mWindow->assertNoEvents();
+ monitor.assertNoEvents();
+}
+
+// If a window is unresponsive, then you get anr. if the window later catches up and starts to
+// process events, you don't get an anr. When the window later becomes unresponsive again, you
+// get an ANR again.
+// 1. tap -> block on ACTION_UP -> receive ANR
+// 2. consume all pending events (= queue becomes healthy again)
+// 3. tap again -> block on ACTION_UP again -> receive ANR second time
+TEST_F(InputDispatcherSingleWindowAnr, SameWindow_CanReceiveAnrTwice) {
+ tapOnWindow();
+
+ mWindow->consumeMotionDown();
+ // Block on ACTION_UP
+ const std::chrono::duration timeout = mWindow->getDispatchingTimeout(DISPATCHING_TIMEOUT);
+ mFakePolicy->assertNotifyAnrWasCalled(timeout, nullptr /*application*/, mWindow->getToken());
+ mWindow->consumeMotionUp(); // Now the connection should be healthy again
+ mDispatcher->waitForIdle();
+ mWindow->assertNoEvents();
+
+ tapOnWindow();
+ mWindow->consumeMotionDown();
+ mFakePolicy->assertNotifyAnrWasCalled(timeout, nullptr /*application*/, mWindow->getToken());
+ mWindow->consumeMotionUp();
+
+ mDispatcher->waitForIdle();
+ mWindow->assertNoEvents();
+}
+
+// If the policy tells us to raise ANR again after some time, ensure that the timeout extension
+// is honored
+TEST_F(InputDispatcherSingleWindowAnr, Policy_CanExtendTimeout) {
+ const std::chrono::duration timeout = 5ms;
+ mFakePolicy->setAnrTimeout(timeout);
+
+ ASSERT_EQ(INPUT_EVENT_INJECTION_SUCCEEDED,
+ injectMotionDown(mDispatcher, AINPUT_SOURCE_TOUCHSCREEN, ADISPLAY_ID_DEFAULT,
+ WINDOW_LOCATION));
+
+ const std::chrono::duration windowTimeout = mWindow->getDispatchingTimeout(DISPATCHING_TIMEOUT);
+ mFakePolicy->assertNotifyAnrWasCalled(windowTimeout, nullptr /*application*/,
+ mWindow->getToken());
+
+ // Since the policy wanted to extend ANR, make sure it is called again after the extension
+ mFakePolicy->assertNotifyAnrWasCalled(timeout, nullptr /*application*/, mWindow->getToken());
+ mFakePolicy->setAnrTimeout(0ms);
+ std::this_thread::sleep_for(windowTimeout);
+ // We are not checking if ANR has been called, because it may have been called again by the
+ // time we set the timeout to 0
+
+ // When the policy finally says stop, we should get ACTION_CANCEL
+ mWindow->consumeMotionDown();
+ mWindow->consumeEvent(AINPUT_EVENT_TYPE_MOTION, AMOTION_EVENT_ACTION_CANCEL,
+ ADISPLAY_ID_DEFAULT, 0 /*flags*/);
+ mWindow->assertNoEvents();
+}
+
+/**
+ * If a window is processing a motion event, and then a key event comes in, the key event should
+ * not to to the focused window until the motion is processed.
+ *
+ * Warning!!!
+ * This test depends on the value of android::inputdispatcher::KEY_WAITING_FOR_MOTION_TIMEOUT
+ * and the injection timeout that we specify when injecting the key.
+ * We must have the injection timeout (10ms) be smaller than
+ * KEY_WAITING_FOR_MOTION_TIMEOUT (currently 500ms).
+ *
+ * If that value changes, this test should also change.
+ */
+TEST_F(InputDispatcherSingleWindowAnr, Key_StaysPendingWhileMotionIsProcessed) {
+ mWindow->setDispatchingTimeout(2s); // Set a long ANR timeout to prevent it from triggering
+ mDispatcher->setInputWindows({{ADISPLAY_ID_DEFAULT, {mWindow}}});
+
+ tapOnWindow();
+ std::optional<uint32_t> downSequenceNum = mWindow->receiveEvent();
+ ASSERT_TRUE(downSequenceNum);
+ std::optional<uint32_t> upSequenceNum = mWindow->receiveEvent();
+ ASSERT_TRUE(upSequenceNum);
+ // Don't finish the events yet, and send a key
+ // Injection will "succeed" because we will eventually give up and send the key to the focused
+ // window even if motions are still being processed. But because the injection timeout is short,
+ // we will receive INJECTION_TIMED_OUT as the result.
+
+ int32_t result =
+ injectKey(mDispatcher, AKEY_EVENT_ACTION_DOWN, 0 /* repeatCount */, ADISPLAY_ID_DEFAULT,
+ INPUT_EVENT_INJECTION_SYNC_WAIT_FOR_RESULT, 10ms);
+ ASSERT_EQ(INPUT_EVENT_INJECTION_TIMED_OUT, result);
+ // Key will not be sent to the window, yet, because the window is still processing events
+ // and the key remains pending, waiting for the touch events to be processed
+ std::optional<uint32_t> keySequenceNum = mWindow->receiveEvent();
+ ASSERT_FALSE(keySequenceNum);
+
+ std::this_thread::sleep_for(500ms);
+ // if we wait long enough though, dispatcher will give up, and still send the key
+ // to the focused window, even though we have not yet finished the motion event
+ mWindow->consumeKeyDown(ADISPLAY_ID_DEFAULT);
+ mWindow->finishEvent(*downSequenceNum);
+ mWindow->finishEvent(*upSequenceNum);
+}
+
+/**
+ * If a window is processing a motion event, and then a key event comes in, the key event should
+ * not go to the focused window until the motion is processed.
+ * If then a new motion comes in, then the pending key event should be going to the currently
+ * focused window right away.
+ */
+TEST_F(InputDispatcherSingleWindowAnr,
+ PendingKey_IsDroppedWhileMotionIsProcessedAndNewTouchComesIn) {
+ mWindow->setDispatchingTimeout(2s); // Set a long ANR timeout to prevent it from triggering
+ mDispatcher->setInputWindows({{ADISPLAY_ID_DEFAULT, {mWindow}}});
+
+ tapOnWindow();
+ std::optional<uint32_t> downSequenceNum = mWindow->receiveEvent();
+ ASSERT_TRUE(downSequenceNum);
+ std::optional<uint32_t> upSequenceNum = mWindow->receiveEvent();
+ ASSERT_TRUE(upSequenceNum);
+ // Don't finish the events yet, and send a key
+ // Injection is async, so it will succeed
+ ASSERT_EQ(INPUT_EVENT_INJECTION_SUCCEEDED,
+ injectKey(mDispatcher, AKEY_EVENT_ACTION_DOWN, 0 /* repeatCount */,
+ ADISPLAY_ID_DEFAULT, INPUT_EVENT_INJECTION_SYNC_NONE));
+ // At this point, key is still pending, and should not be sent to the application yet.
+ std::optional<uint32_t> keySequenceNum = mWindow->receiveEvent();
+ ASSERT_FALSE(keySequenceNum);
+
+ // Now tap down again. It should cause the pending key to go to the focused window right away.
+ tapOnWindow();
+ mWindow->consumeKeyDown(ADISPLAY_ID_DEFAULT); // it doesn't matter that we haven't ack'd
+ // the other events yet. We can finish events in any order.
+ mWindow->finishEvent(*downSequenceNum); // first tap's ACTION_DOWN
+ mWindow->finishEvent(*upSequenceNum); // first tap's ACTION_UP
+ mWindow->consumeMotionDown();
+ mWindow->consumeMotionUp();
+ mWindow->assertNoEvents();
+}
+
+class InputDispatcherMultiWindowAnr : public InputDispatcherTest {
+ virtual void SetUp() override {
+ InputDispatcherTest::SetUp();
+
+ mApplication = new FakeApplicationHandle();
+ mApplication->setDispatchingTimeout(10ms);
+ mUnfocusedWindow =
+ new FakeWindowHandle(mApplication, mDispatcher, "Unfocused", ADISPLAY_ID_DEFAULT);
+ mUnfocusedWindow->setFrame(Rect(0, 0, 30, 30));
+ // Adding FLAG_NOT_TOUCH_MODAL to ensure taps outside this window are not sent to this
+ // window.
+ // Adding FLAG_WATCH_OUTSIDE_TOUCH to receive ACTION_OUTSIDE when another window is tapped
+ mUnfocusedWindow->setLayoutParamFlags(InputWindowInfo::FLAG_NOT_TOUCH_MODAL |
+ InputWindowInfo::FLAG_WATCH_OUTSIDE_TOUCH |
+ InputWindowInfo::FLAG_SPLIT_TOUCH);
+
+ mFocusedWindow =
+ new FakeWindowHandle(mApplication, mDispatcher, "Focused", ADISPLAY_ID_DEFAULT);
+ mFocusedWindow->setDispatchingTimeout(10ms);
+ mFocusedWindow->setFrame(Rect(50, 50, 100, 100));
+ mFocusedWindow->setLayoutParamFlags(InputWindowInfo::FLAG_NOT_TOUCH_MODAL |
+ InputWindowInfo::FLAG_SPLIT_TOUCH);
+
+ // Set focused application.
+ mDispatcher->setFocusedApplication(ADISPLAY_ID_DEFAULT, mApplication);
+ mFocusedWindow->setFocus(true);
+
+ // Expect one focus window exist in display.
+ mDispatcher->setInputWindows({{ADISPLAY_ID_DEFAULT, {mUnfocusedWindow, mFocusedWindow}}});
+ mFocusedWindow->consumeFocusEvent(true);
+ }
+
+ virtual void TearDown() override {
+ InputDispatcherTest::TearDown();
+
+ mUnfocusedWindow.clear();
+ mFocusedWindow.clear();
+ }
+
+protected:
+ sp<FakeApplicationHandle> mApplication;
+ sp<FakeWindowHandle> mUnfocusedWindow;
+ sp<FakeWindowHandle> mFocusedWindow;
+ static constexpr PointF UNFOCUSED_WINDOW_LOCATION = {20, 20};
+ static constexpr PointF FOCUSED_WINDOW_LOCATION = {75, 75};
+ static constexpr PointF LOCATION_OUTSIDE_ALL_WINDOWS = {40, 40};
+
+ void tapOnFocusedWindow() { tap(FOCUSED_WINDOW_LOCATION); }
+
+ void tapOnUnfocusedWindow() { tap(UNFOCUSED_WINDOW_LOCATION); }
+
+private:
+ void tap(const PointF& location) {
+ ASSERT_EQ(INPUT_EVENT_INJECTION_SUCCEEDED,
+ injectMotionDown(mDispatcher, AINPUT_SOURCE_TOUCHSCREEN, ADISPLAY_ID_DEFAULT,
+ location));
+ ASSERT_EQ(INPUT_EVENT_INJECTION_SUCCEEDED,
+ injectMotionUp(mDispatcher, AINPUT_SOURCE_TOUCHSCREEN, ADISPLAY_ID_DEFAULT,
+ location));
+ }
+};
+
+// If we have 2 windows that are both unresponsive, the one with the shortest timeout
+// should be ANR'd first.
+TEST_F(InputDispatcherMultiWindowAnr, TwoWindows_BothUnresponsive) {
+ ASSERT_EQ(INPUT_EVENT_INJECTION_SUCCEEDED,
+ injectMotionDown(mDispatcher, AINPUT_SOURCE_TOUCHSCREEN, ADISPLAY_ID_DEFAULT,
+ FOCUSED_WINDOW_LOCATION))
+ << "Inject motion event should return INPUT_EVENT_INJECTION_SUCCEEDED";
+ mFocusedWindow->consumeMotionDown();
+ mUnfocusedWindow->consumeEvent(AINPUT_EVENT_TYPE_MOTION, AMOTION_EVENT_ACTION_OUTSIDE,
+ ADISPLAY_ID_DEFAULT, 0 /*flags*/);
+ // We consumed all events, so no ANR
+ ASSERT_TRUE(mDispatcher->waitForIdle());
+ mFakePolicy->assertNotifyAnrWasNotCalled();
+
+ ASSERT_EQ(INPUT_EVENT_INJECTION_SUCCEEDED,
+ injectMotionDown(mDispatcher, AINPUT_SOURCE_TOUCHSCREEN, ADISPLAY_ID_DEFAULT,
+ FOCUSED_WINDOW_LOCATION));
+ std::optional<uint32_t> unfocusedSequenceNum = mUnfocusedWindow->receiveEvent();
+ ASSERT_TRUE(unfocusedSequenceNum);
+ std::optional<uint32_t> focusedSequenceNum = mFocusedWindow->receiveEvent();
+ ASSERT_TRUE(focusedSequenceNum);
+
+ const std::chrono::duration timeout =
+ mFocusedWindow->getDispatchingTimeout(DISPATCHING_TIMEOUT);
+ mFakePolicy->assertNotifyAnrWasCalled(timeout, nullptr /*application*/,
+ mFocusedWindow->getToken());
+
+ mFocusedWindow->finishEvent(*focusedSequenceNum);
+ mUnfocusedWindow->finishEvent(*unfocusedSequenceNum);
+ ASSERT_TRUE(mDispatcher->waitForIdle());
+}
+
+// If we have 2 windows with identical timeouts that are both unresponsive,
+// it doesn't matter which order they should have ANR.
+// But we should receive ANR for both.
+TEST_F(InputDispatcherMultiWindowAnr, TwoWindows_BothUnresponsiveWithSameTimeout) {
+ // Set the timeout for unfocused window to match the focused window
+ mUnfocusedWindow->setDispatchingTimeout(10ms);
+ mDispatcher->setInputWindows({{ADISPLAY_ID_DEFAULT, {mUnfocusedWindow, mFocusedWindow}}});
+
+ tapOnFocusedWindow();
+ // we should have ACTION_DOWN/ACTION_UP on focused window and ACTION_OUTSIDE on unfocused window
+ std::pair<sp<InputApplicationHandle>, sp<IBinder>> anrData1 =
+ mFakePolicy->getNotifyAnrData(10ms);
+ std::pair<sp<InputApplicationHandle>, sp<IBinder>> anrData2 =
+ mFakePolicy->getNotifyAnrData(0ms);
+
+ // We don't know which window will ANR first. But both of them should happen eventually.
+ ASSERT_TRUE(mFocusedWindow->getToken() == anrData1.second ||
+ mFocusedWindow->getToken() == anrData2.second);
+ ASSERT_TRUE(mUnfocusedWindow->getToken() == anrData1.second ||
+ mUnfocusedWindow->getToken() == anrData2.second);
+
+ ASSERT_TRUE(mDispatcher->waitForIdle());
+ mFakePolicy->assertNotifyAnrWasNotCalled();
+}
+
+// If a window is already not responding, the second tap on the same window should be ignored.
+// We should also log an error to account for the dropped event (not tested here).
+// At the same time, FLAG_WATCH_OUTSIDE_TOUCH targets should not receive any events.
+TEST_F(InputDispatcherMultiWindowAnr, DuringAnr_SecondTapIsIgnored) {
+ tapOnFocusedWindow();
+ mUnfocusedWindow->consumeEvent(AINPUT_EVENT_TYPE_MOTION, AMOTION_EVENT_ACTION_OUTSIDE,
+ ADISPLAY_ID_DEFAULT, 0 /*flags*/);
+ // Receive the events, but don't respond
+ std::optional<uint32_t> downEventSequenceNum = mFocusedWindow->receiveEvent(); // ACTION_DOWN
+ ASSERT_TRUE(downEventSequenceNum);
+ std::optional<uint32_t> upEventSequenceNum = mFocusedWindow->receiveEvent(); // ACTION_UP
+ ASSERT_TRUE(upEventSequenceNum);
+ const std::chrono::duration timeout =
+ mFocusedWindow->getDispatchingTimeout(DISPATCHING_TIMEOUT);
+ mFakePolicy->assertNotifyAnrWasCalled(timeout, nullptr /*application*/,
+ mFocusedWindow->getToken());
+
+ // Tap once again
+ // We cannot use "tapOnFocusedWindow" because it asserts the injection result to be success
+ ASSERT_EQ(INPUT_EVENT_INJECTION_FAILED,
+ injectMotionDown(mDispatcher, AINPUT_SOURCE_TOUCHSCREEN, ADISPLAY_ID_DEFAULT,
+ FOCUSED_WINDOW_LOCATION));
+ ASSERT_EQ(INPUT_EVENT_INJECTION_FAILED,
+ injectMotionUp(mDispatcher, AINPUT_SOURCE_TOUCHSCREEN, ADISPLAY_ID_DEFAULT,
+ FOCUSED_WINDOW_LOCATION));
+ // Unfocused window does not receive ACTION_OUTSIDE because the tapped window is not a
+ // valid touch target
+ mUnfocusedWindow->assertNoEvents();
+
+ // Consume the first tap
+ mFocusedWindow->finishEvent(*downEventSequenceNum);
+ mFocusedWindow->finishEvent(*upEventSequenceNum);
+ ASSERT_TRUE(mDispatcher->waitForIdle());
+ // The second tap did not go to the focused window
+ mFocusedWindow->assertNoEvents();
+ // should not have another ANR after the window just became healthy again
+ mFakePolicy->assertNotifyAnrWasNotCalled();
+}
+
+// If you tap outside of all windows, there will not be ANR
+TEST_F(InputDispatcherMultiWindowAnr, TapOutsideAllWindows_DoesNotAnr) {
+ ASSERT_EQ(INPUT_EVENT_INJECTION_FAILED,
+ injectMotionDown(mDispatcher, AINPUT_SOURCE_TOUCHSCREEN, ADISPLAY_ID_DEFAULT,
+ LOCATION_OUTSIDE_ALL_WINDOWS));
+ ASSERT_TRUE(mDispatcher->waitForIdle());
+ mFakePolicy->assertNotifyAnrWasNotCalled();
+}
+
+// Since the focused window is paused, tapping on it should not produce any events
+TEST_F(InputDispatcherMultiWindowAnr, Window_CanBePaused) {
+ mFocusedWindow->setPaused(true);
+ mDispatcher->setInputWindows({{ADISPLAY_ID_DEFAULT, {mUnfocusedWindow, mFocusedWindow}}});
+
+ ASSERT_EQ(INPUT_EVENT_INJECTION_FAILED,
+ injectMotionDown(mDispatcher, AINPUT_SOURCE_TOUCHSCREEN, ADISPLAY_ID_DEFAULT,
+ FOCUSED_WINDOW_LOCATION));
+
+ std::this_thread::sleep_for(mFocusedWindow->getDispatchingTimeout(DISPATCHING_TIMEOUT));
+ ASSERT_TRUE(mDispatcher->waitForIdle());
+ // Should not ANR because the window is paused, and touches shouldn't go to it
+ mFakePolicy->assertNotifyAnrWasNotCalled();
+
+ mFocusedWindow->assertNoEvents();
+ mUnfocusedWindow->assertNoEvents();
+}
+
+/**
+ * If a window is processing a motion event, and then a key event comes in, the key event should
+ * not to to the focused window until the motion is processed.
+ * If a different window becomes focused at this time, the key should go to that window instead.
+ *
+ * Warning!!!
+ * This test depends on the value of android::inputdispatcher::KEY_WAITING_FOR_MOTION_TIMEOUT
+ * and the injection timeout that we specify when injecting the key.
+ * We must have the injection timeout (10ms) be smaller than
+ * KEY_WAITING_FOR_MOTION_TIMEOUT (currently 500ms).
+ *
+ * If that value changes, this test should also change.
+ */
+TEST_F(InputDispatcherMultiWindowAnr, PendingKey_GoesToNewlyFocusedWindow) {
+ // Set a long ANR timeout to prevent it from triggering
+ mFocusedWindow->setDispatchingTimeout(2s);
+ mDispatcher->setInputWindows({{ADISPLAY_ID_DEFAULT, {mFocusedWindow, mUnfocusedWindow}}});
+
+ tapOnUnfocusedWindow();
+ std::optional<uint32_t> downSequenceNum = mUnfocusedWindow->receiveEvent();
+ ASSERT_TRUE(downSequenceNum);
+ std::optional<uint32_t> upSequenceNum = mUnfocusedWindow->receiveEvent();
+ ASSERT_TRUE(upSequenceNum);
+ // Don't finish the events yet, and send a key
+ // Injection will succeed because we will eventually give up and send the key to the focused
+ // window even if motions are still being processed.
+
+ int32_t result =
+ injectKey(mDispatcher, AKEY_EVENT_ACTION_DOWN, 0 /*repeatCount*/, ADISPLAY_ID_DEFAULT,
+ INPUT_EVENT_INJECTION_SYNC_NONE, 10ms /*injectionTimeout*/);
+ ASSERT_EQ(INPUT_EVENT_INJECTION_SUCCEEDED, result);
+ // Key will not be sent to the window, yet, because the window is still processing events
+ // and the key remains pending, waiting for the touch events to be processed
+ std::optional<uint32_t> keySequenceNum = mFocusedWindow->receiveEvent();
+ ASSERT_FALSE(keySequenceNum);
+
+ // Switch the focus to the "unfocused" window that we tapped. Expect the key to go there
+ mFocusedWindow->setFocus(false);
+ mUnfocusedWindow->setFocus(true);
+ mDispatcher->setInputWindows({{ADISPLAY_ID_DEFAULT, {mFocusedWindow, mUnfocusedWindow}}});
+
+ // Focus events should precede the key events
+ mUnfocusedWindow->consumeFocusEvent(true);
+ mFocusedWindow->consumeFocusEvent(false);
+
+ // Finish the tap events, which should unblock dispatcher
+ mUnfocusedWindow->finishEvent(*downSequenceNum);
+ mUnfocusedWindow->finishEvent(*upSequenceNum);
+
+ // Now that all queues are cleared and no backlog in the connections, the key event
+ // can finally go to the newly focused "mUnfocusedWindow".
+ mUnfocusedWindow->consumeKeyDown(ADISPLAY_ID_DEFAULT);
+ mFocusedWindow->assertNoEvents();
+ mUnfocusedWindow->assertNoEvents();
+}
+
+// When the touch stream is split across 2 windows, and one of them does not respond,
+// then ANR should be raised and the touch should be canceled for the unresponsive window.
+// The other window should not be affected by that.
+TEST_F(InputDispatcherMultiWindowAnr, SplitTouch_SingleWindowAnr) {
+ // Touch Window 1
+ NotifyMotionArgs motionArgs =
+ generateMotionArgs(AMOTION_EVENT_ACTION_DOWN, AINPUT_SOURCE_TOUCHSCREEN,
+ ADISPLAY_ID_DEFAULT, {FOCUSED_WINDOW_LOCATION});
+ mDispatcher->notifyMotion(&motionArgs);
+ mUnfocusedWindow->consumeEvent(AINPUT_EVENT_TYPE_MOTION, AMOTION_EVENT_ACTION_OUTSIDE,
+ ADISPLAY_ID_DEFAULT, 0 /*flags*/);
+
+ // Touch Window 2
+ int32_t actionPointerDown =
+ AMOTION_EVENT_ACTION_POINTER_DOWN + (1 << AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT);
+
+ motionArgs =
+ generateMotionArgs(actionPointerDown, AINPUT_SOURCE_TOUCHSCREEN, ADISPLAY_ID_DEFAULT,
+ {FOCUSED_WINDOW_LOCATION, UNFOCUSED_WINDOW_LOCATION});
+ mDispatcher->notifyMotion(&motionArgs);
+
+ const std::chrono::duration timeout =
+ mFocusedWindow->getDispatchingTimeout(DISPATCHING_TIMEOUT);
+ mFakePolicy->assertNotifyAnrWasCalled(timeout, nullptr /*application*/,
+ mFocusedWindow->getToken());
+
+ mUnfocusedWindow->consumeMotionDown();
+ mFocusedWindow->consumeMotionDown();
+ // Focused window may or may not receive ACTION_MOVE
+ // But it should definitely receive ACTION_CANCEL due to the ANR
+ InputEvent* event;
+ std::optional<int32_t> moveOrCancelSequenceNum = mFocusedWindow->receiveEvent(&event);
+ ASSERT_TRUE(moveOrCancelSequenceNum);
+ mFocusedWindow->finishEvent(*moveOrCancelSequenceNum);
+ ASSERT_NE(nullptr, event);
+ ASSERT_EQ(event->getType(), AINPUT_EVENT_TYPE_MOTION);
+ MotionEvent& motionEvent = static_cast<MotionEvent&>(*event);
+ if (motionEvent.getAction() == AMOTION_EVENT_ACTION_MOVE) {
+ mFocusedWindow->consumeMotionCancel();
+ } else {
+ ASSERT_EQ(AMOTION_EVENT_ACTION_CANCEL, motionEvent.getAction());
+ }
+
+ ASSERT_TRUE(mDispatcher->waitForIdle());
+ mUnfocusedWindow->assertNoEvents();
+ mFocusedWindow->assertNoEvents();
+}
+
} // namespace android::inputdispatcher