/* * Copyright (c) 2018, 2022, 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. */ import javax.swing.border.TitledBorder; /* * @test * @bug 8204963 * @summary Verifies TitledBorder's memory leak * @run main/othervm -Xmx10M TestTitledBorderLeak */ public class TestTitledBorderLeak { public static void main(String[] args) throws Exception { int max = 100000; long initialFreeMemory = 0L; long currentFreeMemory; try { for (int i = 1; i <= max; i++) { new TitledBorder(""); if ((i % 1000) == 0) { System.gc(); currentFreeMemory = dumpMemoryStatus("After " + i); if(initialFreeMemory == 0L) { initialFreeMemory = currentFreeMemory; } else if( currentFreeMemory < initialFreeMemory/2) { throw new RuntimeException("Memory halved: there's a leak"); } } } }catch(OutOfMemoryError e) { // Don't think it would work; should not happen System.gc(); throw new RuntimeException("There was OOM"); } System.out.println("Passed"); } private static long dumpMemoryStatus(String msg) { Runtime rt = Runtime.getRuntime(); long freeMem = rt.freeMemory(); System.out.println(msg + ": " + freeMem + " free"); return freeMem; } }