[Wisp] Fix initialization problem between JavaNetSocketAccess and its…

… usage

Summary: JavaNetSocketAccess is used in WispServerSocketImpl.java, but the former one's initialization is in Socket.java. This underlying problem shall be fixed.

Test Plan: ServerSocketConnectionTest.java

Reviewed-by: D-D-H, yuleil

Issue: #437

jdk/src/linux/classes/com/alibaba/wisp/engine/WispEngine.java

@@ -30,6 +30,7 @@
 import java.dyn.CoroutineExitException;
 import java.dyn.CoroutineSupport;
 import java.io.IOException;
+import java.net.Socket;
 import java.nio.channels.SelectableChannel;
 import java.nio.channels.SelectionKey;
 import java.util.*;
@@ -148,6 +149,7 @@ private static void initializeClasses() {
             Class.forName(ShutdownEngine.class.getName());
             Class.forName(AbstractShutdownTask.class.getName());
             Class.forName(ShutdownControlGroup.class.getName());
+            Class.forName(Socket.class.getName());
             if (WispConfiguration.WISP_PROFILE) {
                 Class.forName(WispPerfCounterMonitor.class.getName());
             }

jdk/test/com/alibaba/wisp/io/ServerSocketConnectionTest.java

@@ -24,17 +24,44 @@
  * @summary Test ServerSocket isConnected() method
  * @requires os.family == "linux"
  * @library /lib/testlibrary
+ * @build SimpleClient
  * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+EnableCoroutine -XX:+UseWispMonitor -Dcom.alibaba.wisp.transparentWispSwitch=true ServerSocketConnectionTest
  */
 
 import java.io.IOException;
 import java.net.*;
+
 import static jdk.testlibrary.Asserts.assertTrue;
 import static jdk.testlibrary.Asserts.assertFalse;
 
 
 public class ServerSocketConnectionTest {
 
+    private static final String CLIENT = "SimpleClient";
+    private static final String PORT   = "4039";
+
+    public static void testJavaNetSocketAccessInitialization() throws Exception {
+        ServerSocket ss = null;
+        try {
+            ss = new ServerSocket(Integer.parseInt(PORT));
+            // We should avoid using the Socket class here to reproduce this issue.
+            // So we use another process here.
+            ProcessBuilder pb = jdk.testlibrary.ProcessTools.createJavaProcessBuilder(
+                CLIENT,
+                PORT  // port
+            );
+            pb.start();
+            ss.accept();
+        } catch (Exception e) {
+            e.printStackTrace();
+            throw new RuntimeException("Test Failed!");
+        } finally {
+            if (ss != null) {
+                ss.close();
+            }
+        }
+    }
+
     private static void testIsConnectedAfterClosing() throws Exception {
         ServerSocket ss = null;
         Socket s1 = null;
@@ -105,6 +132,7 @@ private static void testIsConnectedAfterAcception() throws Exception {
     }
 
     public static void main(String args[]) throws Exception {
+        testJavaNetSocketAccessInitialization();
         testIsConnectedAfterClosing();
         testIsConnectedAfterConnectionFailure();
         testIsConnectedAfterAcception();

jdk/test/com/alibaba/wisp/io/SimpleClient.java

@@ -0,0 +1,14 @@
+import java.io.IOException;
+import java.net.ServerSocket;
+import java.net.*;
+import java.net.Socket;
+
+public class SimpleClient {
+
+    public static void main(String[] args) throws Exception {
+        Socket socket = new Socket();
+        socket.connect(new InetSocketAddress(InetAddress.getLocalHost(), Integer.parseInt(args[0])));
+        System.out.println(socket.getRemoteSocketAddress());
+    }
+
+}