--- /dev/null	2017-03-08 17:39:57.499858527 -0500
+++ new/test/gc/whitebox/concurrent_phase_control/TestConcurrentPhaseControlBasics.java	2017-03-09 23:56:55.028907208 -0500
@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2017, 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.
+ */
+
+/*
+ * @test TestConcurrentPhaseControlBasics
+ * @bug 8169517
+ * @summary Basic tests of WhiteBox concurrent GC phase control.
+ * @key gc
+ * @modules java.base
+ * @library /test/lib
+ * @build sun.hotspot.WhiteBox
+ * @run main ClassFileInstaller sun.hotspot.WhiteBox
+ * @run main/othervm
+ *   -Xbootclasspath/a:.
+ *   -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
+ *   TestConcurrentPhaseControlBasics
+ */
+
+import sun.hotspot.WhiteBox;
+
+public class TestConcurrentPhaseControlBasics {
+
+    private static final WhiteBox WB = WhiteBox.getWhiteBox();
+
+    private static boolean checkHasPhases(boolean supported) {
+        System.out.println("Expecting " + (supported ? "non-" : "") + "empty phase list");
+        String[] phases = WB.getConcurrentGCPhases();
+        return phases.length != 0;
+    }
+
+    private static boolean request() throws Exception {
+        WB.requestConcurrentGCPhase("UNKNOWN PHASE");
+        return false;
+    }
+
+    private static boolean checkUnknownPhase() throws Exception {
+        System.out.println("Expecting IllegalArgumentException");
+        try {
+            return request();
+        } catch (IllegalArgumentException e) {
+            return true;
+        }
+    }
+
+    private static boolean checkSupported() throws Exception {
+        return checkHasPhases(true) && checkUnknownPhase();
+    }
+
+    private static boolean checkUnsupportedRequest() throws Exception {
+        System.out.println("Expecting IllegalStateException");
+        try {
+            return request();
+        } catch (IllegalStateException e) {
+            return true;
+        }
+    }
+
+    private static boolean checkUnsupported() throws Exception {
+        return !checkHasPhases(false) && checkUnsupportedRequest();
+    }
+
+    private static boolean check() throws Exception {
+        if (WB.supportsConcurrentGCPhaseControl()) {
+            return checkSupported();
+        } else {
+            return checkUnsupported();
+        }
+    }
+
+    public static void main(String[] args) throws Exception {
+        if (!check()) {
+            throw new RuntimeException("Test failed");
+        }
+    }
+}