概述

Android的稳定性包含以下几个方面：

1.ANR

2.Crash

3.Tombstone

4.Freeze

5.黑屏

6.冻屏

#稳定性问题分析以及需要的相关log

/data/anr/traces.txt

/data/system/dropbox

/data/tombstones

Android系统各种稳定性问题所需要的log

Android系统各种稳定性问题所需要的log

adb shell bugreport > bugreport.txt

adb shell dumpstate > dumpstate.log (this command will produce trace log about all process then u need adb pull /data/anr to collect the trace log)

adb shell dumpsys > dumpsys.log

adb pull /data/tombstones (All log file time must be consistent with issue occurred time, it needs to clear /data/anr &; /data/tombstones after stability issue occu)

System Freeze/ Touch panel freeze系统卡死/屏幕卡死

adb shell getevent 此命令可以获取实时触屏以及按键事件log

adb shell getevent -rtl /dev/input/event0 按键事件

open echo w > /proc/sysrq-trigger when capture dmesg and bugreport log as follows:

adb root

adb remount

adb shell

echo w > /proc/sysrq-trigger

&; then exit adb shell, then collect bugreport

adb shell bugreport > bugreport.txt

adb shell kmesg > kmesg.txt 没有kmesg

/proc/sysrq-trigger文件的强大功能

Linux内核调试方法总结之sysrq

/proc/sysrq-trigger详解

adb pull /d/binder/ . 所有的binder信息

adb shell dumpsys window > dump_window.txt

adb shell cat proc/meminfo > meminfo.txt

adb shell procrank > procrank.txt

adb shell top > top.txt

##检查adb,TP,显卡驱动,按键是否正常工作

•Adb workable or not, ANR or not

•CTP workable or not ->

touch screen and observe

the output of “adb shell getevent”.

•Display driver workable or not ->

Use the screencast to see

if the screen can be displayed

•Power key/volume key work or not?

Menu/back/home key work or not?

##触发一次Dump，不同平台方式不一样

It’s better to trigger a ram dump

Before test:

adb root

adb shell “echo 0x843 > /d/spmi/spmi-0/address”

adb shell “echo 0x80 > /d/spmi/spmi-0/data”

Then long press power key more than 10~30s

could trigger a dump.

If device is rebooted, it needs to set again.

Black screen 黑屏

ANR

思路： 机制 –> 触发原因 –> 如何避免 –> 如何分析和解决问题

Android稳定性专题之ANR

Crash

Watchdog

机制/原理 –> 实现方式

Tombstone

Panic

OOM

稳定性测试

参考文献