report分析—堆棧例子

VM traces at last ANR

20:28:50;

-MountService (tid=45 pid=332 prio=5

state=WAIT)java.lang.Object.waitjava.lang.Thread.parkFor (Thread.java)sun.misc.Unsafe.park (Unsafe.java)java.util.concurrent.locks.LockSupport.park (LockSupport.java)java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await (AbstractQueuedSynchronizer.java)java.util.concurrent.LinkedBlockingQueue.take (LinkedBlockingQueue.java)com.android.server.NativeDaemonConnector.doCommandLocked (NativeDaemonConnector.java)com.android.server.NativeDaemonConnector.doCommand (NativeDaemonConnector.java)com.android.server.MountService.doUnmountVolume (MountService.java)com.android.server.MountService.access$100 (MountService.java)com.android.server.MountService$UnmountCallBack.handleFinished (MountService.java)com.android.server.MountService$UmsEnableCallBack.handleFinished (MountService.java)com.android.server.MountService$MountServiceHandler.handleMessage (MountService.java)android.os.Handler.dispatchMessage (Handler.java)android.os.Looper.loop (Looper.java)android.os.HandlerThread.run (HandlerThread.java)

VM traces just now

20:30:24

-MountService (tid=45 pid=332 prio=5

state=NATIVE)android.os.MessageQueue.nativePollOnceandroid.os.MessageQueue.next (MessageQueue.java)android.os.Looper.loop (Looper.java)android.os.HandlerThread.run (HandlerThread.java)

可以看到在anr 時 MountService的狀態。