AndroidStudio Attach To Process不显示系统进程

static void applyDebuggerSystemProperty(ZygoteArguments args) {  
	// 此处限制只有ro.debuggable=1才允许
    if (RoSystemProperties.DEBUGGABLE) {  
        args.mRuntimeFlags |= Zygote.DEBUG_ENABLE_JDWP;  
    }  
}

    /**
     * This will enable jdwp by default for all apps. It is OK to cache this property
     * because we expect to reboot the system whenever this property changes
     */
    private static final boolean ENABLE_JDWP = SystemProperties.get(
                          "persist.debug.dalvik.vm.jdwp.enabled").equals("1");

    /**
     * Applies debugger system properties to the zygote arguments.
     *
     * For eng builds all apps are debuggable. On userdebug and user builds
     * if persist.debuggable.dalvik.vm.jdwp.enabled is 1 all apps are
     * debuggable. Otherwise, the debugger state is specified via the
     * "--enable-jdwp" flag in the spawn request.
     *
     * @param args non-null; zygote spawner args
     */
    static void applyDebuggerSystemProperty(ZygoteArguments args) {
        if (Build.IS_ENG || ENABLE_JDWP) {
            args.mRuntimeFlags |= Zygote.DEBUG_ENABLE_JDWP;
        }
    }