android开机调试(system_process)

系统版本为4.4.4
手机为n4
初始化环境

haidragon@ubuntu:~/Desktop/android$ export CLASSPATH=/home/haidragon/Desktop/jdk1.6.0_45_bin/jdk1.6.0_45/lib
haidragon@ubuntu:~/Desktop/android$ export JAVA_HOME=/home/haidragon/Desktop/jdk1.6.0_45_bin/jdk1.6.0_45
haidragon@ubuntu:~/Desktop/android$ export PATH=$PATH:/home/haidragon/Desktop/jdk1.6.0_45_bin/jdk1.6.0_45/bin
haidragon@ubuntu:~/Desktop/android$ 
source build/envsetup.sh
lunch

编译然后建立连接https://blog.51cto.com/haidragon/2415339
make （/home/haidragon/Desktop/make-3.82/make -j16）

make idegen
source development/tools/idegen/idegen.sh

找到system_process的java层入口函数，如图所示。
android开机调试(system_process)
路径为：'/home/haidragon/Desktop/android/frameworks/base/services/java/com/android/server/SystemServer.java'

.............................................
    private static native void nativeInit();

    public static void main(String[] args) {

        /*
         * In case the runtime switched since last boot (such as when
         * the old runtime was removed in an OTA), set the system
         * property so that it is in sync. We can't do this in
         * libnativehelper's JniInvocation::Init code where we already
         * had to fallback to a different runtime because it is
         * running as root and we need to be the system user to set
         * the property. http://b/11463182
         */
//--------------------------haidragon--------------------------------//
       java.io.File f = new java.io.File("/system/debug");
        if(f.exists()){
            android.ddm.DdmHandleAppName.setAppName("system_process",
                                                    UserHandle.myUserId());
            android.os.Debug.waitForDebugger();
        }
//--------------------------haidragon--------------------------------//
        SystemProperties.set("persist.sys.dalvik.vm.lib",
                             VMRuntime.getRuntime().vmLibrary());
.............................................

这么写的原因是我们可以控制什么时候打开调试，当我们在system创建debug文件时就是打开调试了。
刷手机。
开机adb去system目录创建debug文件,重启手机

shell@mako:/system # mkdir debug
mkdir failed for debug, Read-only file system
255|shell@mako:/system # mount -o rw,remount /system
shell@mako:/system # mkdir debug                                               
shell@mako:/system # ls

android开机调试(system_process)
手机就会一直等待调试器。我们可以用monitor看看(先把as关掉不然俩个冲突了），用android studio里面自带的。初始化环境变量（最好用自带jdk不然无法启动）

haidragon@ubuntu:~$ cd /home/haidragon/Android/Sdk
haidragon@ubuntu:~/Android/Sdk$ ls
build-tools  emulator  fonts     lldb  ndk-bundle  platforms       sources
cmake        extras    licenses  ndk   patcher     platform-tools  tools
haidragon@ubuntu:~/Android/Sdk$ cd tools/
haidragon@ubuntu:~/Android/Sdk/tools$ ls
android  emulator        lib       monitor     package.xml  source.properties
bin      emulator-check  mksdcard  NOTICE.txt  proguard     support
haidragon@ubuntu:~/Android/Sdk/tools$ ./monitor 
ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. Please set the JAVA_HOME variable in your environment to match the location of your Java installation.
lib/monitor- ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. Please set the JAVA_HOME variable in your environment to match the location of your Java installation./monitor
./monitor: line 47: /home/haidragon/Android/Sdk/tools/lib/monitor-: No such file or directory
haidragon@ubuntu:~/Android/Sdk/tools$ export CLASSPATH='/home/haidragon/Desktop/android-studio/jre/lib' 
haidragon@ubuntu:~/Android/Sdk/tools$ export JAVA_HOME='/home/haidragon/Desktop/android-studio/jre' 
haidragon@ubuntu:~/Android/Sdk/tools$ export PATH=$PATH:'/home/haidragon/Desktop/android-studio/jre/jre/bin' 
haidragon@ubuntu:~/Android/Sdk/tools$ ./monitor

android开机调试(system_process)
可能还是无法启动要修改monitor源码。

.........................
oldwd=`pwd`
progdir=`dirname "${prog}"`
cd "${progdir}"

vmarch=`bin/archquery`

app=lib/monitor-${vmarch}/monitor
if [[ "Darwin" == `uname` ]]; then
  app=${app}.app/Contents/MacOS/monitor
fi
if [[ ${vmarch} == "" ]]; then
   echo "haidragon"
   app=lib/monitor-x86_64/monitor
fi

echo ${vmarch}
echo $app

exec $app
.........................

android开机调试(system_process)
打开是这样的，说明没问题，然后开户as附加调试。（关闭monitor)

sh '/home/haidragon/Desktop/android-studio/bin/studio.sh' &

然后附加调试。

android开机调试(system_process)

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