8165180: Provide a shared secret to access non-public ServerSocket constructor

Reviewed-by: chegar

jdk/src/java.base/share/classes/java/net/ServerSocket.java

@@ -25,8 +25,13 @@
 
 package java.net;
 
+import jdk.internal.misc.JavaNetSocketAccess;
+import jdk.internal.misc.SharedSecrets;
+
 import java.io.FileDescriptor;
 import java.io.IOException;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
 import java.nio.channels.ServerSocketChannel;
 import java.security.AccessController;
 import java.security.PrivilegedExceptionAction;
@@ -1011,4 +1016,27 @@ class ServerSocket implements java.io.Closeable {
             return options;
         }
     }
+
+    static {
+        SharedSecrets.setJavaNetSocketAccess(
+            new JavaNetSocketAccess() {
+                @Override
+                public ServerSocket newServerSocket(SocketImpl impl) {
+                    return new ServerSocket(impl);
+                }
+
+                @Override
+                public SocketImpl newSocketImpl(Class<? extends SocketImpl> implClass) {
+                    try {
+                        Constructor<? extends SocketImpl> ctor =
+                            implClass.getDeclaredConstructor();
+                        return ctor.newInstance();
+                    } catch (NoSuchMethodException | InstantiationException |
+                             IllegalAccessException | InvocationTargetException e) {
+                        throw new AssertionError(e);
+                    }
+                }
+            }
+        );
+    }
 }

jdk/src/java.base/share/classes/jdk/internal/misc/JavaNetSocketAccess.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * 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.misc;
+
+import java.net.ServerSocket;
+import java.net.SocketImpl;
+
+public interface JavaNetSocketAccess {
+    /**
+     * Creates a ServerSocket associated with the given SocketImpl.
+     */
+    ServerSocket newServerSocket(SocketImpl impl);
+
+    /*
+     * Constructs a SocketImpl instance of the given class.
+     */
+    SocketImpl newSocketImpl(Class<? extends SocketImpl> implClass);
+}

jdk/src/java.base/share/classes/jdk/internal/misc/SharedSecrets.java

@@ -55,6 +55,7 @@ public class SharedSecrets {
     private static JavaNetAccess javaNetAccess;
     private static JavaNetInetAddressAccess javaNetInetAddressAccess;
     private static JavaNetHttpCookieAccess javaNetHttpCookieAccess;
+    private static JavaNetSocketAccess javaNetSocketAccess;
     private static JavaNioAccess javaNioAccess;
     private static JavaIOFileDescriptorAccess javaIOFileDescriptorAccess;
     private static JavaSecurityProtectionDomainAccess javaSecurityProtectionDomainAccess;
@@ -161,6 +162,16 @@ public class SharedSecrets {
         return javaNetHttpCookieAccess;
     }
 
+    public static void setJavaNetSocketAccess(JavaNetSocketAccess jnsa) {
+        javaNetSocketAccess = jnsa;
+    }
+
+    public static JavaNetSocketAccess getJavaNetSocketAccess() {
+        if (javaNetSocketAccess == null)
+            unsafe.ensureClassInitialized(java.net.ServerSocket.class);
+        return javaNetSocketAccess;
+    }
+
     public static void setJavaNioAccess(JavaNioAccess jna) {
         javaNioAccess = jna;
     }