--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/gc/logging/TestPrintReferences.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,105 @@
+/*
+ * Copyright (c) 2015, 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 TestPrintReferences
+ * @bug 8136991 8186402
+ * @summary Validate the reference processing logging
+ * @key gc
+ * @library /test/lib
+ * @modules java.base/jdk.internal.misc
+ *          java.management
+ */
+
+import java.lang.ref.SoftReference;
+import java.util.ArrayList;
+
+import jdk.test.lib.process.OutputAnalyzer;
+import jdk.test.lib.process.ProcessTools;
+
+public class TestPrintReferences {
+  public static void main(String[] args) throws Exception {
+    ProcessBuilder pb_enabled = ProcessTools.createJavaProcessBuilder("-Xlog:gc+phases+ref=debug",
+                                                                      "-XX:+UseG1GC",
+                                                                      "-Xmx10M",
+                                                                      // Explicit thread setting is required to avoid using only 1 thread
+                                                                      "-XX:ParallelGCThreads=2",
+                                                                      GCTest.class.getName());
+    OutputAnalyzer output = new OutputAnalyzer(pb_enabled.start());
+
+    String indent_4 = "    ";
+    String indent_6 = "      ";
+    String indent_8 = "        ";
+    String gcLogTimeRegex = ".* GC\\([0-9]+\\) ";
+    String countRegex = "[0-9]+";
+    String timeRegex = "[0-9]+[.,][0-9]+ms";
+    String totalRegex = gcLogTimeRegex + indent_4 + "Reference Processing: " + timeRegex + "\n";
+    String balanceRegex = gcLogTimeRegex + indent_8 + "Balance queues: " + timeRegex + "\n";
+    String softRefRegex = gcLogTimeRegex + indent_6 + "SoftReference: " + timeRegex + "\n";
+    String weakRefRegex = gcLogTimeRegex + indent_6 + "WeakReference: " + timeRegex + "\n";
+    String finalRefRegex = gcLogTimeRegex + indent_6 + "FinalReference: " + timeRegex + "\n";
+    String phantomRefRegex = gcLogTimeRegex + indent_6 + "PhantomReference: " + timeRegex + "\n";
+    String refDetailRegex = gcLogTimeRegex + indent_8 + "Phase2: " + timeRegex + "\n" +
+                            gcLogTimeRegex + indent_8 + "Phase3: " + timeRegex + "\n" +
+                            gcLogTimeRegex + indent_8 + "Discovered: " + countRegex + "\n" +
+                            gcLogTimeRegex + indent_8 + "Cleared: " + countRegex + "\n";
+    String softRefDetailRegex = gcLogTimeRegex + indent_8 + "Phase1: " + timeRegex + "\n" + refDetailRegex;
+    String enqueueRegex = gcLogTimeRegex + indent_4 + "Reference Enqueuing: " + timeRegex + "\n";
+    String enqueueDetailRegex = gcLogTimeRegex + indent_6 + "Reference Counts:  Soft: " + countRegex +
+                                "  Weak: " + countRegex + "  Final: " + countRegex + "  Phantom: " + countRegex + "\n";
+
+    output.shouldMatch(/* Total Reference processing time */
+                       totalRegex +
+                       /* SoftReference processing */
+                       softRefRegex + balanceRegex + softRefDetailRegex +
+                       /* WeakReference processing */
+                       weakRefRegex + balanceRegex + refDetailRegex +
+                       /* FinalReference processing */
+                       finalRefRegex + balanceRegex + refDetailRegex +
+                       /* PhantomReference processing */
+                       phantomRefRegex + balanceRegex + refDetailRegex +
+                       /* Total Enqueuing time */
+                       enqueueRegex +
+                         /* Enqueued Stats */
+                       enqueueDetailRegex
+                       );
+
+    output.shouldHaveExitValue(0);
+  }
+
+  static class GCTest {
+    static final int M = 1024 * 1024;
+
+    public static void main(String [] args) {
+
+      ArrayList arrSoftRefs = new ArrayList();
+
+      // Populate to triger GC and then Reference related logs will be printed.
+      for (int i = 0; i < 10; i++) {
+        byte[] tmp = new byte[M];
+
+        arrSoftRefs.add(new SoftReference(tmp));
+      }
+    }
+  }
+}