diff -r 1246bc23416f -r f9cb8492293a jdk/test/java/awt/Graphics2D/DrawString/DrawStringCrash.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/jdk/test/java/awt/Graphics2D/DrawString/DrawStringCrash.java Thu Jun 26 16:14:54 2014 -0700 @@ -0,0 +1,64 @@ +/* + * 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 + * @summary Drawing a very long string crashes VM + */ + +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(s, 20, 20); + } catch (OutOfMemoryError e) { + return; + } + sb.append(sb); + len *= 2; + } + return; + } +}