1.com.android.provision ANR
(平台android6 mstar芯片 内存1G)
1.从device log看,cpu只有30占用排除cpu导致的anr
2.anr类型为input dispatching time out 按键无响应
3.从trace看,pid 4618主线程处于空闲状态,不像进程本身原因导致的anr
E/ActivityManager( 1817): ANR in com.android.provision (com.android.provision/.DefaultActivity) E/ActivityManager( 1817): PID: 4618 E/ActivityManager( 1817): Reason: Input dispatching timed out (Waiting because no window has focus but there is a focused application that may eventually add a window when it finishes starting up.) E/ActivityManager( 1817): Load: 6.39 / 3.99 / 1.64 E/ActivityManager( 1817): CPU usage from 2964ms to -3326ms ago: E/ActivityManager( 1817): 54% 1817/system_server: 22% user + 32% kernel / faults: 6134 minor 18 major E/ActivityManager( 1817): 0.2% 1298/debuggerd64: 0% user + 0.1% kernel / faults: 8120 minor 14 major E/ActivityManager( 1817): 0.1% 1296/debuggerd: 0% user + 0.1% kernel / faults: 5868 minor 7 major E/ActivityManager( 1817): 4.6% 2100/com.android.systemui: 1.4% user + 3.1% kernel / faults: 1639 minor 2 major E/ActivityManager( 1817): 3.9% 3073/com.android.bluetooth: 2% user + 1.9% kernel / faults: 1216 minor 5 major ... E/ActivityManager( 1817): 30% TOTAL: 12% user + 16% kernel + 1.8% iowait //只有30cpu占用 ----- pid 4618 at 2018-05-28 16:48:35 ----- Cmd line: com.android.provision "main" prio=5 tid=1 Native | group="main" sCount=1 dsCount=0 obj=0x7485cf80 self=0xab4c6f60 | sysTid=4618 nice=0 cgrp=default sched=0/0 handle=0xf7402b34 | state=S schedstat=( 0 0 0 ) utm=3 stm=1 core=3 HZ=100 | stack=0xff690000-0xff692000 stackSize=8MB | held mutexes= kernel: __switch_to+0x74/0x8c kernel: SyS_epoll_wait+0x384/0x47c kernel: compat_SyS_epoll_pwait+0x124/0x130 kernel: cpu_switch_to+0x48/0x4c native: #00 pc 00043d94 /system/lib/libc.so (__epoll_pwait+20) native: #01 pc 0001955f /system/lib/libc.so (epoll_pwait+26) native: #02 pc 0001956d /system/lib/libc.so (epoll_wait+6) native: #03 pc 00012d6b /system/lib/libutils.so (_ZN7android6Looper9pollInnerEi+102) native: #04 pc 00012feb /system/lib/libutils.so (_ZN7android6Looper8pollOnceEiPiS1_PPv+130) native: #05 pc 00083459 /system/lib/libandroid_runtime.so (_ZN7android18NativeMessageQueue8pollOnceEP7_JNIEnvP8_jobjecti+22) native: #06 pc 0018b6b5 /data/dalvik-cache/arm/system@[email protected] (Java_android_os_MessageQueue_nativePollOnce__JI+96) at android.os.MessageQueue.nativePollOnce(Native method) at android.os.MessageQueue.next(MessageQueue.java:323) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5417) at java.lang.reflect.Method.invoke!(Native method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:731) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:621)
4.查看device log主进程干了啥,搜索关键字4618,发现log只有从anr开始,无相关进程信息
5.anr本身没问题,cpu没问题,查看是否为memory导致,发现有大量lowmemorykiller现象,杀死的adj值不算太低,不过此时systemui的adj值为529,感觉有点不合理。此时剩余内存27848kb + 缓存内存195224kb = 200m,不算太低,也不算高
28---16-48-48ler( 1290): Error writing /proc/4010/oom_score_a[ 188.373842] lowmemorykiller: Killing 'system:ui' (4726), adj 529, 0528---16-48-48[ 188.373842] to free 27848kB on behalf of 'dropcaches.sh' (4800) because 0528---16-48-48[ 188.373842] cache 195244kB is below limit 80000kB for oom_score_adj 529 0528---16-48-48[ 188.373842] Free memory is 171988kB above reserved, free_cma=126260kB
6.感觉像是内存低导致
7.查看app源码,发现只有几行代码,都是原生的,没有啥耗时操作
2.provision介绍
Provision的作用很简单,就是一个系统初始化引导程序,原生的Android里面Provision只做了一件事,就是写入一个DEVICE_PROVISIONED标记。不过这个标记作用很大,这个标记只会在系统全新升级(双清)的时候写入一次,代表了Android系统升级准备完成,可以正常工作。
<intent-filter android:priority="1">
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.HOME" />
<category android:name="android.intent.category.DEFAULT" />
属于launcher,优先级为1,会比一般launcher先启动起来
3.代码介绍
代码位置:android\packages\apps\Provisionpublic class DefaultActivity extends Activity { @Override protected void onCreate(Bundle icicle) { super.onCreate(icicle); // Add a persistent setting to allow other apps to know the device has been provisioned. Settings.Global.putInt(getContentResolver(), Settings.Global.DEVICE_PROVISIONED, 1); Settings.Secure.putInt(getContentResolver(), Settings.Secure.USER_SETUP_COMPLETE, 1); // remove this activity from the package manager. PackageManager pm = getPackageManager(); ComponentName name = new ComponentName(this, DefaultActivity.class); pm.setComponentEnabledSetting(name, PackageManager.COMPONENT_ENABLED_STATE_DISABLED, PackageManager.DONT_KILL_APP); // terminate the activity. finish(); } }
1.Settings.Global.putInt(getContentResolver(), Settings.Global.DEVICE_PROVISIONED, 1);//代表申请完成,写文件位于/data/system/users/0/global.xml,也就是此apk只在清空数据格式化升级和强刷升级会执行
2.执行完后禁止Provision自己的Activity组件
void setComponentEnabledSetting (ComponentName componentName, int newState, int flags)
- componentName:组件名称
- newState:组件新的状态,可以设置三个值,分别是如下:
- 不可用状态:COMPONENT_ENABLED_STATE_DISABLED
- 可用状态:COMPONENT_ENABLED_STATE_ENABLED
- 默认状态:COMPONENT_ENABLED_STATE_DEFAULT
- flags:行为标签,值可以是DONT_KILL_APP或者0。 0说明杀死包含该组件的app