process: Add setProcessGroup() hidden API call to set the cgroup of (3e458241) · Commits · e / os / android_frameworks_base

core/java/android/os/Process.java

+14 −0

Original line number	Diff line number	Diff line
		@@ -604,6 +604,20 @@ public class Process {
		*/
		public static final native void setThreadGroup(int tid, int group)
		throws IllegalArgumentException, SecurityException;
		/**
		* Sets the scheduling group for a process and all child threads
		* @hide
		* @param pid The indentifier of the process to change.
		* @param group The target group for this process.
		*
		* @throws IllegalArgumentException Throws IllegalArgumentException if
		* <var>tid</var> does not exist.
		* @throws SecurityException Throws SecurityException if your process does
		* not have permission to modify the given thread, or to use the given
		* priority.
		*/
		public static final native void setProcessGroup(int pid, int group)
		throws IllegalArgumentException, SecurityException;

		/**
		* Set the priority of the calling thread, based on Linux priorities. See

+31 −0

Original line number	Diff line number	Diff line
		@@ -236,6 +236,36 @@ void android_os_Process_setThreadGroup(JNIEnv* env, jobject clazz, int pid, jint
		signalExceptionForGroupError(env, clazz, errno);
		}

		void android_os_Process_setProcessGroup(JNIEnv* env, jobject clazz, int pid, jint grp)
		{
		DIR *d;
		FILE *fp;
		char proc_path[255];
		struct dirent *de;

		if (grp > ANDROID_TGROUP_MAX \|\| grp < 0) {
		signalExceptionForGroupError(env, clazz, EINVAL);
		return;
		}

		sprintf(proc_path, "/proc/%d/task", pid);
		if (!(d = opendir(proc_path))) {
		signalExceptionForGroupError(env, clazz, errno);
		return;
		}

		while ((de = readdir(d))) {
		if (de->d_name[0] == '.')
		continue;
		if (add_pid_to_cgroup(atoi(de->d_name), grp)) {
		signalExceptionForGroupError(env, clazz, errno);
		closedir(d);
		return;
		}
		}
		closedir(d);
		}

		void android_os_Process_setThreadPriority(JNIEnv* env, jobject clazz,
		jint pid, jint pri)
		{
		@@ -820,6 +850,7 @@ static const JNINativeMethod methods[] = {
		{"setThreadPriority", "(I)V", (void*)android_os_Process_setCallingThreadPriority},
		{"getThreadPriority", "(I)I", (void*)android_os_Process_getThreadPriority},
		{"setThreadGroup", "(II)V", (void*)android_os_Process_setThreadGroup},
		{"setProcessGroup", "(II)V", (void*)android_os_Process_setProcessGroup},
		{"setOomAdj", "(II)Z", (void*)android_os_Process_setOomAdj},
		{"setArgV0", "(Ljava/lang/String;)V", (void*)android_os_Process_setArgV0},
		{"setUid", "(I)I", (void*)android_os_Process_setUid},