1 /* 2 * Copyright (c) 2010, 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 24 import java.util.logging.*; 25 26 public class AnonLoggerWeakRefLeak { 27 public static int DEFAULT_LOOP_TIME = 60; // time is in seconds 28 29 public static void main(String[] args) { 30 int loop_time = 0; 31 int max_loop_time = DEFAULT_LOOP_TIME; 32 33 if (args.length == 0) { 34 System.out.println("INFO: using default time of " 35 + max_loop_time + " seconds."); 36 } else { 37 try { 38 max_loop_time = Integer.parseInt(args[0]); 39 } catch (NumberFormatException nfe) { 40 System.err.println("Error: '" + args[0] 41 + "': is not a valid seconds value."); 42 System.err.println("Usage: AnonLoggerWeakRefLeak [seconds]"); 43 System.exit(1); 44 } 45 } 46 47 long count = 0; 48 long now = 0; 49 long startTime = System.currentTimeMillis(); 50 51 while (now < (startTime + (max_loop_time * 1000))) { 52 if ((count % 1000) == 0) { 53 // Print initial call count to let caller know that 54 // we're up and running and then periodically 55 System.out.println("INFO: call count = " + count); 56 } 57 58 for (int i = 0; i < 100; i++) { 59 // this Logger call is leaking a WeakReference in Logger.kids 60 java.util.logging.Logger.getAnonymousLogger(); 61 count++; 62 } 63 64 try { 65 // delay for 1/10 of a second to avoid CPU saturation 66 Thread.sleep(100); 67 } catch (InterruptedException ie) { 68 // ignore any exceptions 69 } 70 71 now = System.currentTimeMillis(); 72 } 73 74 System.out.println("INFO: final loop count = " + count); 75 } 76 }