--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/gc/TestSoftReferencesBehaviorOnOOME.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,149 @@
+/*
+ * Copyright (c) 2014, 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.
+ */
+
+/**
+ * @test TestSoftReferencesBehaviorOnOOME
+ * @key gc
+ * @summary Tests that all SoftReferences has been cleared at time of OOM.
+ * @library /test/lib
+ * @modules java.base/jdk.internal.misc
+ * @run main/othervm -Xmx128m TestSoftReferencesBehaviorOnOOME 512 2k
+ * @run main/othervm -Xmx128m TestSoftReferencesBehaviorOnOOME 128k 256k
+ * @run main/othervm -Xmx128m TestSoftReferencesBehaviorOnOOME 2k 32k
+ */
+import jdk.test.lib.Utils;
+import jdk.test.lib.Asserts;
+import java.lang.ref.SoftReference;
+import java.util.LinkedList;
+import java.util.Random;
+
+public class TestSoftReferencesBehaviorOnOOME {
+
+    /**
+     * Test generates a lot of soft references to objects with random payloads.
+     * Then it provokes OOME and checks that all SoftReferences has been gone
+     * @param args - [minSize] [maxSize] [freq]
+     *  where
+     *  - minSize - min size of random objects
+     *  - maxSize - max size of random objects
+     */
+    public static void main(String[] args) {
+        long minSize = DEFAULT_MIN_SIZE;
+        long maxSize = DEFAULT_MAX_SIZE;
+
+        if ( args.length >= 2) {
+            maxSize = getBytesCount(args[1]);
+        }
+
+        if ( args.length >= 1) {
+            minSize = getBytesCount(args[0]);
+        }
+
+        new TestSoftReferencesBehaviorOnOOME().softReferencesOom(minSize, maxSize);
+    }
+
+    /**
+     * Test that all SoftReferences has been cleared at time of OOM.
+     */
+    void softReferencesOom(long minSize, long maxSize) {
+        System.out.format( "minSize = %d, maxSize = %d%n", minSize, maxSize );
+
+        LinkedList<SoftReference> arrSoftRefs = new LinkedList();
+        staticRef = arrSoftRefs;
+        LinkedList arrObjects = new LinkedList();
+        staticRef = arrObjects;
+
+        long multiplier = maxSize - minSize;
+        long numberOfNotNulledObjects = 0;
+
+        try {
+
+            // Lets allocate as many as we can - taking size of all SoftRerefences
+            // by minimum. So it can provoke some GC but we surely will allocate enough.
+            long numSofts = (long) ((0.95 * Runtime.getRuntime().totalMemory()) / minSize);
+            System.out.println("num Soft: " + numSofts);
+
+            while (numSofts-- > 0) {
+                int allocationSize = ((int) (RND_GENERATOR.nextDouble() * multiplier))
+                            + (int)minSize;
+                arrSoftRefs.add(new SoftReference(new byte[allocationSize]));
+            }
+
+            System.out.println("free: " + Runtime.getRuntime().freeMemory());
+
+            // provoke OOME.
+            while (true) {
+                arrObjects.add(new byte[(int) Runtime.getRuntime().totalMemory()]);
+            }
+
+        } catch (OutOfMemoryError oome) {
+
+            // Clear allocated ballast, so we don't get another OOM.
+            staticRef = null;
+            arrObjects = null;
+            long oomSoftArraySize = arrSoftRefs.size();
+
+            for (SoftReference sr : arrSoftRefs) {
+                Object o = sr.get();
+
+                if (o != null) {
+                    numberOfNotNulledObjects++;
+                }
+            }
+
+            // Make sure we clear all refs before we return failure
+            arrSoftRefs = null;
+            Asserts.assertFalse(numberOfNotNulledObjects > 0,
+                    "" + numberOfNotNulledObjects + " out of "
+                    + oomSoftArraySize + " SoftReferences was not "
+                    + "null at time of OutOfMemoryError"
+            );
+        } finally {
+            Asserts.assertTrue(arrObjects == null, "OOME hasn't been provoked");
+            Asserts.assertTrue(arrSoftRefs == null, "OOME hasn't been provoked");
+        }
+    }
+
+    private static final long getBytesCount(String arg) {
+        String postfixes = "kMGT";
+        long mod = 1;
+
+        if (arg.trim().length() >= 2) {
+            mod = postfixes.indexOf(arg.trim().charAt(arg.length() - 1));
+
+            if (mod != -1) {
+                mod = (long) Math.pow(1024, mod+1);
+                arg = arg.substring(0, arg.length() - 1);
+            } else {
+                mod = 1; // 10^0
+            }
+        }
+
+        return Long.parseLong(arg) * mod;
+    }
+
+    private static final Random RND_GENERATOR = Utils.getRandomInstance();
+    private static final long DEFAULT_MIN_SIZE = 512;
+    private static final long DEFAULT_MAX_SIZE = 1024;
+    private static Object staticRef; // to prevent compile optimisations
+}