1 /* 2 * Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package nsk.jvmti.ResourceExhausted; 24 25 import java.io.PrintStream; 26 import java.util.concurrent.atomic.AtomicInteger; 27 28 import nsk.share.Consts; 29 import nsk.share.test.Stresser; 30 31 public class resexhausted001 { 32 static { 33 System.loadLibrary("resexhausted"); 34 } 35 36 static final long MAX_ITERATIONS = 2000000L; // Resasonable limit on number of threads 37 38 static Object hanger = new Object(); 39 static boolean threadsDone; 40 static AtomicInteger threadCount = new AtomicInteger(); 41 run(String args[], PrintStream out)42 public static int run(String args[], PrintStream out) { 43 44 Stresser stress = new Stresser(args); 45 46 int count = 0; 47 threadsDone = false; 48 threadCount.set(0); 49 Helper.resetExhaustedEvent(); 50 51 System.out.println("Creating threads..."); 52 stress.start(MAX_ITERATIONS); 53 try { 54 while ( stress.iteration() ) { 55 makeThread(); 56 } 57 58 System.out.println("Can't reproduce OOME due to a limit on iterations/execution time. Test was useless."); 59 return Consts.TEST_PASSED; 60 61 } catch (OutOfMemoryError e) { 62 count = threadCount.get(); 63 threadsDone = true; 64 synchronized (hanger) { 65 hanger.notifyAll(); 66 } 67 } finally { 68 stress.finish(); 69 } 70 71 while ( threadCount.get() > 2 ) { 72 try { Thread.sleep(100); } catch ( InterruptedException swallow ) {} 73 } 74 75 System.gc(); 76 if (!Helper.checkResult("creating " + count + " threads")) { 77 return Consts.TEST_FAILED; 78 } 79 80 return Consts.TEST_PASSED; 81 } 82 makeThread()83 static Thread makeThread() { 84 final Thread thr = new Thread(new Runnable() { 85 public void run() { 86 threadCount.getAndIncrement(); 87 while (!threadsDone) { 88 try { 89 synchronized (hanger) { 90 hanger.wait(); 91 } 92 } catch (InterruptedException ignored) {} 93 } 94 threadCount.getAndDecrement(); 95 } 96 }, "fleece"); 97 thr.start(); 98 return thr; 99 } 100 main(String[] args)101 public static void main(String[] args) { 102 args = nsk.share.jvmti.JVMTITest.commonInit(args); 103 104 int result = run(args, System.out); 105 System.out.println(result == Consts.TEST_PASSED ? "TEST PASSED" : "TEST FAILED"); 106 System.exit(result + Consts.JCK_STATUS_BASE); 107 } 108 } 109