74 lines
2.2 KiB
Java
74 lines
2.2 KiB
Java
/*
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* Copyright (c) 1997, 1998, 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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/* @test
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* @bug 4076283
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* @summary java.lang.ref.SoftReference should reliably prevent
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* OutOfMemoryErrors
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* @author Peter Jones
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* @author Mark Reinhold
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*/
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/* If this test fails, an OutOfMemoryError will be thrown */
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import java.lang.ref.SoftReference;
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public class Bash {
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static class TestReference extends SoftReference {
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public static TestReference head;
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public TestReference next;
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public TestReference(Object referent) {
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super(referent);
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next = head;
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head = this;
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}
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}
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static final int NUM_BLOCKS = 2048;
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static final int BLOCK_SIZE = 32768;
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public static void main(String[] args) throws Exception {
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for (int i = 0; i < NUM_BLOCKS; ++ i) {
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TestReference ref = new TestReference(new byte[BLOCK_SIZE]);
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}
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int emptyCount = 0;
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int fullCount = 0;
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for (TestReference r = TestReference.head; r != null; r = r.next) {
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if (r.get() == null) emptyCount++;
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else fullCount++;
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}
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System.err.println(fullCount + " full, " + emptyCount + " empty ");
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}
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}
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