65 lines
2.2 KiB
Java
65 lines
2.2 KiB
Java
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/*
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* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8043508
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* @summary Drawing a very long string crashes VM
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*/
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import java.awt.*;
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import java.awt.image.*;
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public class DrawStringCrash {
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public static void main(String[] args) {
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StringBuffer sb = new StringBuffer();
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String s = "abcdefghijklmnopqrstuzwxyz";
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for (int x = 0; x < 100000 ; x++) {
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sb.append(s);
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}
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// Now have a string which uses approx 5Mb memory
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// Loop again drawing doubling each time until
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// we reach 8 billion chars or get OOME which means we can't
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// go any further.
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// Often there is no crash because Java OOM happens
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// long before native heap runs out.
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long maxLen = 8L * 1024 * 1024 * 1024;
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int len = sb.length();
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BufferedImage bi =
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new BufferedImage(100, 100, BufferedImage.TYPE_INT_RGB);
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Graphics2D g2d = bi.createGraphics();
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while (len < maxLen) {
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try {
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g2d.drawString(s, 20, 20);
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} catch (OutOfMemoryError e) {
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return;
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}
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sb.append(sb);
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len *= 2;
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}
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return;
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}
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}
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