diff -r fd16c54261b3 -r 489c9b5090e2 hotspot/agent/test/jdi/serialvm.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/agent/test/jdi/serialvm.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,137 @@
+/*
+ * Copyright 2003 Sun Microsystems, Inc.  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.
+ *
+ * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+import com.sun.jdi.*;
+import com.sun.jdi.connect.*;
+
+import java.util.Map;
+import java.util.List;
+import java.util.Iterator;
+import java.io.IOException;
+
+
+/* This class is used to test multi VM connectivity feature of
+ * SA/JDI. Accepts two PIDs as arguments. Connects to first VM
+ *, disposes it, connects to second VM, disposes second VM.
+ */
+
+
+public class serialvm {
+    static AttachingConnector myPIDConn;
+    static VirtualMachine vm1;
+    static VirtualMachine vm2;
+    static VirtualMachineManager vmmgr;
+
+    public static void println(String msg) {
+        System.out.println(msg);
+    }
+
+    private static void usage() {
+        System.err.println("Usage: java serialvm <pid1> <pid2>");
+        System.exit(1);
+    }
+
+    public static void main(String args[]) {
+        vmmgr = Bootstrap.virtualMachineManager();
+        List attachingConnectors = vmmgr.attachingConnectors();
+        if (attachingConnectors.isEmpty()) {
+            System.err.println( "ERROR: No attaching connectors");
+            return;
+        }
+        Iterator myIt = attachingConnectors.iterator();
+        while (myIt.hasNext()) {
+            AttachingConnector tmpCon = (AttachingConnector)myIt.next();
+            if (tmpCon.name().equals(
+                "sun.jvm.hotspot.jdi.SAPIDAttachingConnector")) {
+                myPIDConn = tmpCon;
+                break;
+            }
+        }
+
+        int pid1 = 0, pid2 = 0;
+        String pidText = null;
+        switch (args.length) {
+        case (2):
+            try {
+                pidText = args[0];
+                pid1 = Integer.parseInt(pidText);
+                System.out.println( "pid1: " + pid1);
+                pidText = args[1];
+                pid2 = Integer.parseInt(pidText);
+                System.out.println( "pid2: " + pid2);
+            } catch (NumberFormatException e) {
+                println(e.getMessage());
+                usage();
+            }
+            break;
+        default:
+            usage();
+        }
+
+        // attach, dispose, attach2, dispose2 pattern
+        // as opposed to attach1, attach2, dispose1, dispose2
+        vm1 = attachPID(pid1);
+        if (vm1 != null) {
+            System.out.println("vm1: attached ok!");
+            System.out.println(vm1.version());
+            sagdoit mine = new sagdoit(vm1);
+            mine.doAll();
+        }
+        if (vm1 != null) {
+            vm1.dispose();
+        }
+
+        vm2 = attachPID(pid2);
+        if (vm2 != null) {
+            System.out.println("vm2: attached ok!");
+            System.out.println(vm2.version());
+            sagdoit mine = new sagdoit(vm2);
+            mine.doAll();
+        }
+
+
+        if (vm2 != null) {
+            vm2.dispose();
+        }
+    }
+
+   private static VirtualMachine attachPID(int pid) {
+        Map connArgs = myPIDConn.defaultArguments();
+        System.out.println("connArgs = " + connArgs);
+        VirtualMachine vm;
+        Connector.StringArgument connArg = (Connector.StringArgument)connArgs.get("pid");
+        connArg.setValue(Integer.toString(pid));
+
+        try {
+            vm = myPIDConn.attach(connArgs);
+        } catch (IOException ee) {
+            System.err.println("ERROR: myPIDConn.attach got IO Exception:" + ee);
+            vm = null;
+        } catch (IllegalConnectorArgumentsException ee) {
+            System.err.println("ERROR: myPIDConn.attach got illegal args exception:" + ee);
+            vm = null;
+        }
+        return vm;
+   }
+}