| /* |
| * Copyright (c) 2014, 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. |
| */ |
| |
| /* |
| * @test |
| * @bug 8043508 8080084 |
| * @summary Drawing a very long string crashes VM |
| * @run main/othervm DrawStringCrash |
| */ |
| |
| import java.awt.*; |
| import java.awt.image.*; |
| |
| public class DrawStringCrash { |
| |
| public static void main(String[] args) { |
| StringBuffer sb = new StringBuffer(); |
| String s = "abcdefghijklmnopqrstuzwxyz"; |
| for (int x = 0; x < 100000 ; x++) { |
| sb.append(s); |
| } |
| // Now have a string which uses approx 5Mb memory |
| // Loop again drawing doubling each time until |
| // we reach 8 billion chars or get OOME which means we can't |
| // go any further. |
| // Often there is no crash because Java OOM happens |
| // long before native heap runs out. |
| long maxLen = 8L * 1024 * 1024 * 1024; |
| int len = sb.length(); |
| |
| BufferedImage bi = |
| new BufferedImage(100, 100, BufferedImage.TYPE_INT_RGB); |
| Graphics2D g2d = bi.createGraphics(); |
| while (len < maxLen) { |
| try { |
| g2d.drawString(sb.toString(), 20, 20); |
| sb.append(sb); |
| len *= 2; |
| } catch (OutOfMemoryError e) { |
| return; |
| } |
| } |
| return; |
| } |
| } |