--- /dev/null	2020-02-11 09:31:42.601809740 +0100
+++ new/src/java.base/linux/classes/jdk/internal/platform/CgroupUtil.java	2020-02-11 18:28:53.922664563 +0100
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2020, Red Hat Inc.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.platform;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.security.AccessController;
+import java.security.PrivilegedActionException;
+import java.security.PrivilegedExceptionAction;
+import java.util.List;
+import java.util.stream.Stream;
+
+public final class CgroupUtil {
+
+    public static Stream<String> readFilePrivileged(Path path) throws IOException {
+        try {
+            PrivilegedExceptionAction<Stream<String>> pea = () -> Files.lines(path);
+            return AccessController.doPrivileged(pea);
+        } catch (PrivilegedActionException e) {
+            unwrapIOExceptionAndRethrow(e);
+            throw new InternalError(e.getCause());
+        }
+    }
+
+    static void unwrapIOExceptionAndRethrow(PrivilegedActionException pae) throws IOException {
+        Throwable x = pae.getCause();
+        if (x instanceof IOException)
+            throw (IOException) x;
+        if (x instanceof RuntimeException)
+            throw (RuntimeException) x;
+        if (x instanceof Error)
+            throw (Error) x;
+    }
+
+    static String readStringValue(CgroupSubsystemController controller, String param) throws IOException {
+        PrivilegedExceptionAction<BufferedReader> pea = () ->
+                Files.newBufferedReader(Paths.get(controller.path(), param));
+        try (BufferedReader bufferedReader =
+                     AccessController.doPrivileged(pea)) {
+            String line = bufferedReader.readLine();
+            return line;
+        } catch (PrivilegedActionException e) {
+            unwrapIOExceptionAndRethrow(e);
+            throw new InternalError(e.getCause());
+        }
+    }
+
+    static List<String> readAllLinesPrivileged(Path path) throws IOException {
+        try {
+            PrivilegedExceptionAction<List<String>> pea = () -> Files.readAllLines(path);
+            return AccessController.doPrivileged(pea);
+        } catch (PrivilegedActionException e) {
+            unwrapIOExceptionAndRethrow(e);
+            throw new InternalError(e.getCause());
+        }
+    }
+}