1 /* 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * 4 * This code is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License version 2 only, as 6 * published by the Free Software Foundation. 7 * 8 * This code is distributed in the hope that it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 11 * version 2 for more details (a copy is included in the LICENSE file that 12 * accompanied this code). 13 * 14 * You should have received a copy of the GNU General Public License version 15 * 2 along with this work; if not, write to the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 17 * 18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 19 * or visit www.oracle.com if you need additional information or have any 20 * questions. 21 */ 22 23 /* 24 * This file is available under and governed by the GNU General Public 25 * License version 2 only, as published by the Free Software Foundation. 26 * However, the following notice accompanied the original version of this 27 * file: 28 * 29 * Written by Doug Lea with assistance from members of JCP JSR-166 30 * Expert Group and released to the public domain, as explained at 31 * http://creativecommons.org/publicdomain/zero/1.0/ 32 */ 33 34 /* 35 * @test 36 * @author Doug Lea 37 * @bug 8004138 38 * @summary Check if ForkJoinPool table leaks thrown exceptions. 39 * @run main/othervm -Xmx8m -Djava.util.concurrent.ForkJoinPool.common.parallelism=4 FJExceptionTableLeak 40 */ 41 42 import java.util.concurrent.ForkJoinPool; 43 import java.util.concurrent.RecursiveAction; 44 45 public class FJExceptionTableLeak { 46 // This test was observed to fail with pre-bug-fix jdk7 -Xmx8m, 47 // using STEPS = 220 and TASKS_PER_STEP = 100 48 static final int PRE_BUG_FIX_FAILURE_STEPS = 220; 49 static final int STEPS = 10 * PRE_BUG_FIX_FAILURE_STEPS; 50 static final int TASKS_PER_STEP = 100; 51 52 static class FailingTaskException extends RuntimeException {} 53 static class FailingTask extends RecursiveAction { 54 public void compute() { 55 throw new FailingTaskException(); 56 } 57 } 58 59 public static void main(String[] args) throws InterruptedException { 60 ForkJoinPool pool = new ForkJoinPool(4); 61 FailingTask[] tasks = new FailingTask[TASKS_PER_STEP]; 62 for (int k = 0; k < STEPS; ++k) { 63 for (int i = 0; i < tasks.length; ++i) 64 tasks[i] = new FailingTask(); 65 for (int i = 0; i < tasks.length; ++i) 66 pool.execute(tasks[i]); 67 for (int i = 0; i < tasks.length; ++i) { 68 try { 69 tasks[i].join(); 70 throw new AssertionError("should throw"); 71 } catch (FailingTaskException success) {} 72 } 73 } 74 } 75 }