执行Monkey测试，拨号出现1 system_app_crash-com.android.dialer
acore进程死亡导致ContactsProvider挂掉，进而Dialer挂掉，因为Dialer会访问联系人
crash时间为：
05-08 15:48:49.931 3645 3645 E AndroidRuntime: Process: com.android.dialer, PID: 364505-08 15:48:49.931 3645 3645 E
AndroidRuntime: android.database.StaleDataException: Attempted to access a cursor after it has been closed.05-08 15:48:49.931 3645 3645 EAndroidRuntime: at android.database.BulkCursorToCursorAdaptor.throwIfCursorIsClosed(BulkCursorToCursorAdaptor.java:63)
05-08 15:48:49.931 3645 3645 E AndroidRuntime: at android.database.BulkCursorToCursorAdaptor.getCount(BulkCursorToCursorAdaptor.java:69)
6586为acore进程：
./events.txt:05-08 15:48:48.522 1324 12273 I am_proc_start: [0,6586,10001,android.process.acore,content provider,com.android.providers.contacts/.CallLogProvider]./system.txt:05-08 15:48:48.522 1324 12273 I
ActivityManager: Start proc 6586:android.process.acore/u0a1 for content provider com.android.providers.contacts/.CallLogProvider.
/events.txt:05-08 15:48:48.575 1324 13665 I am_proc_bound: [0,6586,android.process.acore]
./main.txt:05-08 15:48:48.664 6586 6586 I zygote64: The ClassLoaderContext is a special shared library..
/main.txt:05-08 15:48:48.865 6586 6586 I zygote64: The ClassLoaderContext is a special shared library..
/main.txt:05-08 15:48:48.914 6586 6586 I ContactsPerf: VoicemailContentProvider.onCreate start
./main.txt:05-08 15:48:48.922 6586 6586 I ContactsPerf: VoicemailContentProvider.onCreate finish.
/main.txt:05-08 15:48:48.924 6586 6602 D ContactsDatabaseHelper: WAL enabled for contacts2.db: true.
/main.txt:05-08 15:48:48.935 6586 6586 I zygote64: The ClassLoaderContext is a special shared library..
/main.txt:05-08 15:48:48.956 6586 6586 I zygote64: The ClassLoaderContext is a special shared library..
/main.txt:05-08 15:48:49.055 6586 6602 D ContactsDatabaseHelper: WAL enabled for profile.db: false.
/main.txt:05-08 15:48:49.915 6586 6604 D AppsProvider.ApplicationsProvider: Updating database (packageName = null)....
/main.txt:05-08 15:48:50.206 6586 6592 I zygote64: Do partial code cache collection, code=30KB, data=21KB.
/main.txt:05-08 15:48:50.206 6586 6592 I zygote64: After code cache collection, code=30KB, data=21KB.
/main.txt:05-08 15:48:50.206 6586 6592 I zygote64: Increasing code cache capacity to 128KB
./main.txt:05-08 15:48:50.289 6586 6592 I zygote64: Do partial code cache collection, code=54KB, data=38KB.
/main.txt:05-08 15:48:50.289 6586 6592 I zygote64: After code cache collection, code=51KB, data=37KB
./main.txt:05-08 15:48:50.289 6586 6592 I zygote64: Increasing code cache capacity to 256KB.
/main.txt:05-08 15:48:50.375 6586 6604 D AppsProvider.ApplicationsProvider: Finished updating database..
/main.txt:05-08 15:48:51.140 6586 6602 D HanziToPinyin: HanziToPinyin is inited
ContactsProvider初始化时间为：15:48:51.140，
acore进程为6586，查询时间为15:48:48.482
acore进程号这么大，还在查询之后说明acore进程死过一次了，
从如下Log看到 15:48:48.157 时间acore进程因为low_memory被kill掉了，
05-08 15:48:48.149 1324 18287 I am_low_memory: 1705-08
15:48:48.157 1324 3721 I am_proc_died: [0,3755,android.process.acore,0,3]05-08
15:48:48.164 1324 3721 I am_low_memory: 16此时系统内存很少了，大量进程被Kill05-08 15:48:48.024 1324 16667 I am_proc_died: [0,4951,com.baidu.map.location,100,8]05-08
15:48:48.029 1324 16667 I am_schedule_service_restart: [0,com.baidu.map.location/.BaiduNetworkLocationService,144583]05-08
15:48:48.029 1324 16667 I am_uid_stopped: 1000305-08
15:48:48.035 1324 16667 I am_low_memory: 1905-08
15:48:48.057 1324 18287 I am_proc_died: [0,4975,com.qualcomm.qcrilmsgtunnel,100,6]05-08
15:48:48.057 1324 18287 I am_schedule_service_restart: [0,com.qualcomm.qcrilmsgtunnel/.QcrilMsgTunnelService,154554]05-08
15:48:48.067 1324 18287 I am_low_memory: 1805-08
15:48:48.105 1324 18287 I am_proc_died: [0,5030,com.android.smspush,100,6]
05-08 15:48:48.130 1324 18287 I am_schedule_service_restart: [0,com.android.smspush/.WapPushManager,164481]
05-08 15:48:48.131 1324 18287 I am_uid_stopped: 10081
05-08 15:48:48.149 1324 18287 I am_low_memory: 17
所以根本原因是系统low_memory acore进程被杀导致ContactsProvider访问异常，
进而dialer崩溃low_memory原因请相关人员查看下
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