8166289: RuntimeException: canRead() reports false for reading from the same module: expected true, was false

A fix in the JDWP test along with some extra logging added

Reviewed-by: sspitsyn

hotspot/test/serviceability/jdwp/JdwpModuleCmd.java

@@ -0,0 +1,34 @@
+/*
+ * 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.
+ *
+ * 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.
+ */
+
+/**
+ * The JDWP MODULE command
+ */
+public class JdwpModuleCmd extends JdwpCmd<JdwpModuleReply> {
+
+    public JdwpModuleCmd(long refId) {
+        super(19, 2, JdwpModuleReply.class, refLen());
+        putRefId(refId);
+    }
+
+}