8199370: [TESTBUG] Open source vm testbase GC tests

Reviewed-by: erikj, ihse, ehelin

test/hotspot/jtreg/vmTestbase/gc/hashcode/HashCodeSimpleTest/HashCodeSimpleTest.java

@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2011, 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.
+ */
+
+/*
+ * @test
+ * @key stress gc
+ *
+ * @summary converted from VM Testbase gc/hashcode/HashCodeSimpleTest.
+ * VM Testbase keywords: [gc, stress, stressopt, nonconcurrent, jrockit]
+ * VM Testbase readme:
+ * DESCRIPTION
+ * Hash code regressiontests.
+ *
+ * COMMENTS
+ * This test was ported from JRockit test suite.
+ *
+ * @library /vmTestbase
+ *          /test/lib
+ * @run driver jdk.test.lib.FileInstaller . .
+ * @run main/othervm -XX:-UseGCOverheadLimit gc.hashcode.HashCodeSimpleTest.HashCodeSimpleTest
+ */
+
+package gc.hashcode.HashCodeSimpleTest;
+
+import nsk.share.TestFailure;
+import nsk.share.gc.GC;
+import nsk.share.gc.ThreadedGCTest;
+
+/**
+ * Hash code regressiontests.
+ */
+public class HashCodeSimpleTest extends ThreadedGCTest {
+
+    @Override
+    protected Runnable createRunnable(int i) {
+
+
+
+        /**
+         * Test verifies that VM provided hashcodes are constant over invocations.
+         * @return success if the test passes
+         *          failure if some hashvalue has changed
+         */
+        return new Runnable() {
+            long counter = 0;
+
+
+            @Override
+            public void run() {
+
+                Object object = new Object();
+                int hashCode0 = object.hashCode();
+
+                for (int i = 0; i < 100; i++) {
+                    int hashCode = object.hashCode();
+
+                    if (hashCode != hashCode0) {
+                        throw new TestFailure("Repeated hash code queries broken: "
+                                + hashCode0 + "!=" + hashCode);
+                    }
+                }
+                if (counter++ % 1000000 == 0) {
+                    log.info(counter / 1000000 + " million hashcodes verified");
+                }
+
+
+            }
+        };
+    }
+
+    public static void main(String args[]) {
+        GC.runTest(new HashCodeSimpleTest(), args);
+    }
+}