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起因

JT同学拿着手机来找我说用着用着自动重启了,让我看一下,我抓出bugreport一看是system server发生watchdog重启了,然后接着看了一下traces,发现traces比较诡异。

初步分析

为什么说traces诡异?暂且一看

都被thread 31持有的锁给block了,那就看看thread 31在搞什么飞机?

"InputDispatcher" prio=10 tid=31 Native
  | group="main" sCount=1 dsCount=0 obj=0x133d90a0 self=0x7f73f8c800
  | sysTid=1662 nice=-8 cgrp=default sched=0/0 handle=0x7f5f80b440
  | state=S schedstat=( 1388341757 1177043722 12975 ) utm=81 stm=57 core=2 HZ=100
  | stack=0x7f5f70f000-0x7f5f711000 stackSize=1013KB
  | held mutexes=
  kernel: (couldn't read /proc/self/task/1662/stack)
  native: #00 pc 00000000000684e0  /system/lib64/libc.so (__ioctl+4)
  native: #01 pc 0000000000072508  /system/lib64/libc.so (ioctl+100)
  native: #02 pc 000000000002d584  /system/lib64/libbinder.so (_ZN7android14IPCThreadState14talkWithDriverEb+164)
  native: #03 pc 000000000002e050  /system/lib64/libbinder.so (_ZN7android14IPCThreadState15waitForResponseEPNS_6ParcelEPi+104)
  native: #04 pc 000000000002e2c4  /system/lib64/libbinder.so (_ZN7android14IPCThreadState8transactEijRKNS_6ParcelEPS1_j+176)
  native: #05 pc 0000000000025654  /system/lib64/libbinder.so (_ZN7android8BpBinder8transactEjRKNS_6ParcelEPS1_j+64)
  native: #06 pc 00000000000e02cc  /system/lib64/libandroid_runtime.so (???)
  native: #07 pc 0000000000505e64  /data/dalvik-c

本文标签: 重启系统Ctrl