ANRtraces分析系统一直出现waitingfor...日志

我们遇到Android系统开机界面(bootanimation)后&＃xff0c;系统没法运行起来的问题&＃xff0c;

系统一直出现 waiting for ...日志

似乎在等什么服务启动

因此怀疑system server 被block了

调试方法如下&＃xff1a;

1. adb shell mkdir /data/anr/

2. adb shell ps | grep system_server

system 1138 234 908376 39440 ffffffff 40061a54 S system_server

3. adb shell kill -3 1138

4. adb shell pull /data/anr/trace.txt

----- pid 1138 at 2014-01-01 08:40:42 -----
Cmd line: system_server


JNI: CheckJNI is off; workarounds are off; pins&＃61;1; globals&＃61;289


DALVIK THREADS:
(mutexes: tll&＃61;0 tsl&＃61;0 tscl&＃61;0 ghl&＃61;0)


"main" prio&＃61;5 tid&＃61;1 MONITOR
| group&＃61;"main" sCount&＃61;1 dsCount&＃61;0 obj&＃61;0x4159ee58 self&＃61;0x414be920
| sysTid&＃61;1138 nice&＃61;-2 sched&＃61;0/0 cgrp&＃61;apps handle&＃61;1073963348
| state&＃61;S schedstat&＃61;( 6367457522 242583118 5270 ) utm&＃61;595 stm&＃61;41 core&＃61;0
at com.android.server.am.ActivityManagerService.registerReceiver(ActivityManagerService.java:~13106)

- waiting to lock <0x41965278> (a com.android.server.am.ActivityManagerService) held by tid&＃61;27 (InputDispatcher)

at android.app.ContextImpl.registerReceiverInternal(ContextImpl.java:1458)
at android.app.ContextImpl.registerReceiverAsUser(ContextImpl.java:1433)
at android.content.pm.RegisteredServicesCache.(RegisteredServicesCache.java:134)
at android.content.SyncAdaptersCache.(SyncAdaptersCache.java:43)
at com.android.server.content.SyncManager.(SyncManager.java:399)
at com.android.server.content.ContentService.getSyncManager(ContentService.java:75)
at com.android.server.content.ContentService.notifyChange(ContentService.java:283)
at android.content.ContentResolver.notifyChange(ContentResolver.java:1621)
at com.android.providers.settings.SettingsProvider.sendNotify(SettingsProvider.java:262)
at com.android.providers.settings.SettingsProvider.insertForUser(SettingsProvider.java:941)
at com.android.providers.settings.SettingsProvider.call(SettingsProvider.java:645)
at android.content.ContentProvider$Transport.call(ContentProvider.java:325)
at android.provider.Settings$NameValueCache.putStringForUser(Settings.java:903)
at android.provider.Settings$System.putStringForUser(Settings.java:1169)
at android.provider.Settings$System.putIntForUser(Settings.java:1274)
at android.provider.Settings$System.putInt(Settings.java:1268)

可以清晰的看到调用堆栈&＃xff0c;是谁阻塞了system_server 的运行。