--- /dev/null	2018-05-14 10:15:02.574213890 -0700
+++ new/test/hotspot/jtreg/vmTestbase/vm/runtime/defmeth/shared/Constants.java	2018-05-21 10:53:07.041502355 -0700
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2013, 2018, 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.
+ */
+
+package vm.runtime.defmeth.shared;
+
+import static java.lang.String.format;
+
+/**
+ * Set of constants which are used in the test suite.
+ * The actual values can be changed through corresponding property.
+ */
+public class Constants {
+    static public final boolean PRINT_ASSEMBLY    = getValue("vm.runtime.defmeth.printAssembly",          false);
+    static public final boolean PRINT_TESTS       = getValue("vm.runtime.defmeth.printTests",             false);
+    static public final boolean ASMIFY            = getValue("vm.runtime.defmeth.printASMify",            false);
+    static public final boolean DUMP_CLASSES      = getValue("vm.runtime.defmeth.dumpClasses",            false);
+    static public final boolean PRINT_STACK_TRACE = getValue("vm.runtime.defmeth.printStackTrace",        false);
+    static public final boolean TRACE_CLASS_REDEF = getValue("vm.runtime.defmeth.traceClassRedefinition", false);
+
+    /**
+     * Get value of the test suite's property
+     * Supported values:
+     *   ""        == true
+     *   "true"    == true
+     *   "false"   == false
+     *   undefined == default value
+     */
+    static boolean getValue(String property, boolean defaultValue) {
+        String value = System.getProperty(property);
+
+        if ("false".equals(value))  return false;
+        if ("true".equals(value))   return true;
+        if ("".equals(value))       return true;
+        if (value == null )         return defaultValue;
+
+        throw new IllegalArgumentException(format("Unknown value: -D%s=%s", property, value));
+    }
+}