no focused window ANR

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R项目上面的出现了no focused window的ANR
09-09 17:49:58.482  1164  1347 W InputDispatcher: Waiting because no window has focus but ActivityRecord{94be3e0 u0 com.android.settings/.SubSettings t50} may eventually add a window when it finishes starting up. Will wait for 5000ms
...
09-09 17:49:58.482  1164  1347 W InputDispatcher: Still no focused window. Will drop the event in 4999ms
...
09-09 17:49:58.683  1747  1747 I wm_on_resume_called: [155968480,com.android.settings.SubSettings,RESUME_ACTIVITY]

09-09 17:49:58.710  1747  1747 I wm_on_top_resumed_gained_called: [155968480,com.android.settings.SubSettings,topWhenResuming]

09-09 17:49:59.324  1747  1747 I wm_on_stop_called: [246711063,com.transsion.settings.LocalPickerSubSetting,LIFECYCLER_STOP_ACTIVITY]
09-09 17:49:59.331  1747  1747 I wm_on_destroy_called: [246711063,com.transsion.settings.LocalPickerSubSetting,performDestroy]
....
09-09 17:50:03.261  1164  1347 W InputDispatcher: Still no focused window. Will drop the event in 221ms
09-09 17:50:03.488  1164  1347 I WindowManager: Input event dispatching timed out sending to application ActivityRecord{94be3e0 u0 com.android.settings/.SubSettings.  Reason: ActivityRecord{94be3e0 u0 com.android.settings/.SubSettings t50} does not have a focused window
...
09-09 17:50:03.734  1164  9946 I am_anr  : [0,1747,com.android.settings,952745541,Input dispatching timed out (ActivityRecord{94be3e0 u0 com.android.settings/.SubSettings t50} does not have a focused window)]

wm_add_to_stopping: [0,229779648,com.transsion.phonemaster/com.transsion.antivirus.view.activity.SecurityScanActivity,makeInvisible]   update focus 置为null 

分析流程：

frameworks/native/services/inputflinger/dispatcher/InputDispatcher.cpp 
onAnrLocked{ does not have a focused window}

InputDispatcher::onAnrLocked  --->

738  /**
739   * Check if any of the connections' wait queues have events that are too old.
740   * If we waited for events to be ack'ed for more than the window timeout, raise an ANR.
741   * Return the time at which we should wake up next.
742   */

InputDispatcher::processAnrsLocked--->

///
这句输出是由于
09-09 17:49:58.482  1164  1347 W InputDispatcher: Waiting because no window has focus but ActivityRecord{94be3e0 u0 com.android.settings/.SubSettings t50} may eventually add a window when it finishes starting up. Will wait for 5000ms
这句输出是由于focusedWindowHandle为空，而 focusedApplicationHandle不为空

1796      // Compatibility behavior: raise ANR if there is a focused application, but no focused window.
1797      // Only start counting when we have a focused event to dispatch. The ANR is canceled if we
1798      // start interacting with another application via touch (app switch). This code can be removed
1799      // if the "no focused window ANR" is moved to the policy. Input doesn't know whether
1800      // an app is expected to have a focused window.
1782      sp<InputWindowHandle> focusedWindowHandle =
1783              getValueByKey(mFocusedWindowHandlesByDisplay, displayId);
1784      sp<InputApplicationHandle> focusedApplicationHandle =
1785              getValueByKey(mFocusedApplicationHandlesByDisplay, displayId);

而这两个分别是从mFocusedWindowHandlesByDisplay和mFocusedApplicationHandlesByDisplay中根据displayId这个key值来获取的

InputDispatcher::findFocusedWindowTargetsLocked--->
mFocusedWindowHandlesByDisplay从setInputWindowsLocked的传入的 sp<InputWindowHandle>序列中获取。
在setInputWindowsLocked里根据传入的新的newFocusedWindowHandle在其序列中获取有焦点，可见的window。
与前一个oldFocusedWindowHandle比较，如果不相同则进一步判断，做赋值的切换替换旧窗口。
 

4056  /**
4057   * Called from InputManagerService, update window handle list by displayId that can receive input.
4058   * A window handle contains information about InputChannel, Touch Region, Types, Focused,...
4059   * If set an empty list, remove all handles from the specific display.
4060   * For focused handle, check if need to change and send a cancel event to previous one.
4061   * For removed handle, check if need to send a cancel event if already in touch.
4062   */

InputDispatcher::setInputWindowsLocked--->

InputDispatcher::setInputWindows -->
/frameworks/native/libs/input/IInputFlinger.cpp
在的BpInputFlinger将InputWindowInfo中的IInputFlinger::getInterfaceDescriptor()和inputInfo.size()封装进parcel再通过Binder发送到Bn端处理
44          remote()->transact(BnInputFlinger::SET_INPUT_WINDOWS_TRANSACTION, data, &reply,
45                  IBinder::FLAG_ONEWAY);
/frameworks/native/services/surfaceflinger/SurfaceFlinger.cpp
当mVisibleRegionsDirty 和 mInputInfoChanged其中一个变量变为true时，则会刷新。
SurfaceFlinger::updateInputWindowInfo--->

SurfaceFlinger::updateInputFlinger-->
MessageQueue::INVALIDATE刷新时，调用updateInputFlinger，从layer中获取信息，通过setInputWindows传入InputFlinger中。
SurfaceFlinger::onMessageReceived {case: MessageQueue::INVALIDATE}-->
frameworks/native/services/surfaceflinger/Scheduler/MessageQueue.cpp
MessageQueue::Handler::handleMessage--->

发生ANR时，需要连续两次事件发送到同一个window中，而且是同样的条件，即focusedWindowHandle为null，而focusedApplicationHandle不为null，如果application退出，那么将不会继续发送事件到前一个application中，不会出现anr。如上分析，ANR发生时，SubSettings的application并没有stop，但是对应界面的SubSettings不再进行改变，而已一直都为null。
 

Input刷新流程.
SurfaceFlinger.run -->
surfaceflinger/Scheduler/MessageQueue.waitMessage -->
surfaceflinger/Scheduler/MessageQueue.cb_eventReceiver -->
surfaceflinger/Scheduler/MessageQueue.eventReceiver--->
//Input刷新
surfaceflinger/Scheduler/MessageQueue.dispatchInvalidate---> mQueue.mFlinger->onMessageReceived(message.what, mExpectedVSyncTime);
--->
SurfaceFlinger.onMessageReceived--->MessageQueue::INVALIDATE
SurfaceFlinger.onMessageInvalidate-->
SurfaceFlinger.updateInputFlinger-->
SurfaceFlinger.updateInputWindowInfo -->
   IInputFlinger.setInputWindows{
      remote()->transact(BnInputFlinger::SET_INPUT_WINDOWS_TRANSACTION, data, 
    &reply,IBinder::FLAG_ONEWAY);
}--->
InputDispatcher.setInputWindows-->

///相关堆栈
09-23 20:21:46.960  1150  2473 D InputDispatcher:   #00 pc 0002e033  /system/lib/libinputflinger.so (android::inputdispatcher::InputDispatcher::setInputWindows(std::__1::unordered_map<int, std::__1::vector<android::sp<android::InputWindowHandle>, std::__1::allocator<android::sp<android::InputWindowHandle> > >, std::__1::hash<int>, std::__1::equal_to<int>, std::__1::allocator<std::__1::pair<int const, std::__1::vector<android::sp<android::InputWindowHandle>, std::__1::allocator<android::sp<android::InputWindowHandle> > > > > > const&)+70)
09-23 20:21:46.960  1150  2473 D InputDispatcher:   #01 pc 00020d21  /system/lib/libinputflinger.so (android::InputManager::setInputWindows(std::__1::vector<android::InputWindowInfo, std::__1::allocator<android::InputWindowInfo> > const&, android::sp<android::ISetInputWindowsListener> const&)+288)
09-23 20:21:46.961  1150  2473 D InputDispatcher:   #02 pc 0001d361  /system/lib/libinput.so (android::BnInputFlinger::onTransact(unsigned int, android::Parcel const&, android::Parcel*, unsigned int)+636)
09-23 20:21:46.961  1150  2473 D InputDispatcher:   #03 pc 000343b9  /system/lib/libbinder.so (android::BBinder::transact(unsigned int, android::Parcel const&, android::Parcel*, unsigned int)+144)
09-23 20:21:46.961  1150  2473 D InputDispatcher:   #04 pc 0003a459  /system/lib/libbinder.so (android::IPCThreadState::executeCommand(int)+624)
09-23 20:21:46.961  1150  2473 D InputDispatcher:   #05 pc 0003a133  /system/lib/libbinder.so (android::IPCThreadState::getAndExecuteCommand()+98)
09-23 20:21:46.961  1150  2473 D InputDispatcher:   #06 pc 0003a7b3  /system/lib/libbinder.so (android::IPCThreadState::joinThreadPool(bool)+38)
09-23 20:21:46.961  1150  2473 D InputDispatcher:   #07 pc 00053de9  /system/lib/libbinder.so (android::PoolThread::threadLoop()+12)
09-23 20:21:46.961  1150  2473 D InputDispatcher:   #08 pc 0000ee65  /system/lib/libutils.so (android::Thread::_threadLoop(void*)+168)
09-23 20:21:46.961  1150  2473 D InputDispatcher:   #09 pc 0006cd4f  /system/lib/libandroid_runtime.so (android::AndroidRuntime::javaThreadShell(void*)+86)
09-23 20:21:46.961  1150  2473 D InputDispatcher:   #10 pc 0000e9ad  /system/lib/libutils.so (thread_data_t::trampoline(thread_data_t const*)+256)
09-23 20:21:46.961  1150  2473 D InputDispatcher:   #11 pc 00080823  /apex/com.android.runtime/lib/bionic/libc.so (__pthread_start(void*)+40)
09-23 20:21:46.961  1150  2473 D InputDispatcher:   #12 pc 00039d03  /apex/com.android.runtime/lib/bionic/libc.so (__start_thread+30)
09-23 20:21:46.961  1150  2473 I InputDispatcher: setInputWindows displayId=0 Window{5e8ef54 u0 NavigationBar0} Window{f5cbd95 u0 StatusBar} Window{43e24d0 u0 com.android.settings/com.android.settings.Settings} Window{30a7619 u0 com.android.systemui.ImageWallpaper}

09-23 20:21:46.843   512   512 D IInputFlinger:   #00 pc 0001d647  /system/lib/libinput.so (android::BpInputFlinger::setInputWindows(std::__1::vector<android::InputWindowInfo, std::__1::allocator<android::InputWindowInfo> > const&, android::sp<android::ISetInputWindowsListener> const&)+278)
09-23 20:21:46.843   512   512 D IInputFlinger:   #01 pc 000bb7bb  /system/lib/libsurfaceflinger.so (android::SurfaceFlinger::onMessageInvalidate(long long)+6982)
09-23 20:21:46.843   512   512 D IInputFlinger:   #02 pc 000b9c23  /system/lib/libsurfaceflinger.so (android::SurfaceFlinger::onMessageReceived(int, long long)+110)
09-23 20:21:46.843   512   512 D IInputFlinger:   #03 pc 00011d0d  /system/lib/libutils.so (android::Looper::pollInner(int)+292)
09-23 20:21:46.843   512   512 D IInputFlinger:   #04 pc 00011b93  /system/lib/libutils.so (android::Looper::pollOnce(int, int*, int*, void**)+62)
09-23 20:21:46.843   512   512 D IInputFlinger:   #05 pc 000a6dc1  /system/lib/libsurfaceflinger.so (android::impl::MessageQueue::waitMessage()+56)
09-23 20:21:46.843   512   512 D IInputFlinger:   #06 pc 000b4b07  /system/lib/libsurfaceflinger.so (android::SurfaceFlinger::run()+8)
09-23 20:21:46.843   512   512 D IInputFlinger:   #07 pc 0000248b  /system/bin/surfaceflinger (main+590)
09-23 20:21:46.843   512   512 D IInputFlinger:   #08 pc 000330c1  /apex/com.android.runtime/lib/bionic/libc.so (__libc_init+68)

09-23 22:24:18.529   505   552 I SurfaceFlinger: [SF client] NEW(0xae4345d0) for (1152:system_server)
09-23 22:24:18.549   505   505 D MessageQueue:   #00 pc 000a6e7d  /system/lib/libsurfaceflinger.so (android::impl::MessageQueue::cb_eventReceiver(int, int, void*)+224)
09-23 22:24:18.549   505   505 D MessageQueue:   #01 pc 00011ea1  /system/lib/libutils.so (android::Looper::pollInner(int)+696)
09-23 22:24:18.549   505   505 D MessageQueue:   #02 pc 00011b93  /system/lib/libutils.so (android::Looper::pollOnce(int, int*, int*, void**)+62)

09-23 22:24:18.549   505   505 D MessageQueue:   #03 pc 000a6f55  /system/lib/libsurfaceflinger.so (android::impl::MessageQueue::waitMessage()+56)
09-23 22:24:18.549   505   505 D MessageQueue:   #04 pc 000b4c97  /system/lib/libsurfaceflinger.so (android::SurfaceFlinger::run()+8)
09-23 22:24:18.549   505   505 D MessageQueue:   #05 pc 0000248b  /system/bin/surfaceflinger (main+590)
09-23 22:24:18.549   505   505 D MessageQueue:   #06 pc 000330c1  /apex/com.android.runtime/lib/bionic/libc.so (__libc_init+68)

本文标签： FocusedwindowANR