--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/serviceability/sa/LingeredAppWithRecComputation.java Mon Sep 23 20:26:18 2019 +0200
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2019, Red Hat Inc. 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.
+ */
+
+import jdk.test.lib.apps.LingeredApp;
+
+public class LingeredAppWithRecComputation extends LingeredApp {
+
+ public static final String THREAD_NAME = "LingeredAppWithRecComputation.factorial()";
+
+ private long factorial(int n) {
+ if (n <= 1) {
+ return 1;
+ }
+ if (n == 2) {
+ return 2;
+ }
+ return n * factorial(n - 1);
+ }
+
+ public void testLoop() {
+ long result = 0;
+ long[] lastNResults = new long[20];
+ int i = 0;
+ int j = 0;
+ while (true) {
+ result = factorial(i);
+ lastNResults[j] = result;
+ if (i % 12 == 0) {
+ i = -1; // reset i
+ }
+ if (j % 19 == 0) {
+ j = -1; // reset j
+ }
+ i++; j++;
+ }
+ }
+
+ public static void main(String args[]) {
+ LingeredAppWithRecComputation app = new LingeredAppWithRecComputation();
+ Thread factorial = new Thread(() -> {
+ app.testLoop();
+ });
+ factorial.setName(THREAD_NAME);
+ factorial.start();
+ LingeredApp.main(args);
+ }
+ }