66 lines
2.4 KiB
Java
66 lines
2.4 KiB
Java
/*
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* Copyright (c) 2023, 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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package gc.g1;
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import java.util.LinkedHashMap;
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/* @test
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* @bug 8313212
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* @summary Finalizing objects may create new concurrent marking work during reference processing.
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* If the marking work overflows the global mark stack, we should resize the global mark stack
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* until MarkStackSizeMax if possible.
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* @requires vm.gc.G1
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* @run main/othervm -XX:ActiveProcessorCount=2 -XX:MarkStackSize=1 -Xmx250m gc.g1.TestMarkStackOverflow
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*/
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public class TestMarkStackOverflow {
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public static void main(String[] args) throws Exception {
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for (int i = 0; i < 10; i++) {
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Finalizable holder1 = new Finalizable();
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System.out.printf("Used mem %.2f MB\n", getUsedMem());
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}
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}
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private static double getUsedMem() {
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return (Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory()) / (double) (1024 * 1024);
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}
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private static class Finalizable {
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public static final int NUM_OBJECTS = 200_000;
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private final LinkedHashMap<Object, Object> list = new LinkedHashMap<>();
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public Finalizable() {
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for (int i = 0; i < NUM_OBJECTS; i++) {
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Object entry = new Object();
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list.put(entry, entry);
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}
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}
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@SuppressWarnings("removal")
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protected void finalize() {
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System.out.print("");
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}
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}
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}
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