55233a42f3
Deprecate -XX:+AggressiveOpts and remove it from testing. Reviewed-by: kvn, dholmes, shade
71 lines
2.5 KiB
Java
71 lines
2.5 KiB
Java
/*
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* Copyright (c) 2013, 2018, 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 7042126
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* @summary Verify that we do not leak contents when we clone a HashMap
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* @author david.buck@oracle.com
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* @run main/othervm HashMapCloneLeak
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* @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+EliminateAutoBox -XX:AutoBoxCacheMax=20000 HashMapCloneLeak
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*/
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import java.util.HashMap;
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import java.lang.ref.WeakReference;
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public class HashMapCloneLeak {
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static WeakReference<Object> wr = null;
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// helper method to keep testObject and map out of main method's scope
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private static HashMap<Integer, Object> makeMap() {
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HashMap<Integer, Object> map = new HashMap<Integer, Object>();
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Object testObject = new Object();
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wr = new WeakReference<Object>(testObject);
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map.put(42, testObject);
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return map;
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}
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public static void main(String[] args) throws Exception {
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HashMap<Integer, Object> hm = makeMap();
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hm = (HashMap<Integer, Object>)hm.clone();
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hm.clear();
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// There should no longer be a strong reference to testObject
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// the WeakReference should be nulled out by GC. If not,
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// we will hang here until timed out by the test harness.
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Object[] chain = null;
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while (wr.get() != null) {
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try {
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Object[] allocate = new Object[1000000];
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allocate[0] = chain;
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chain = allocate;
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} catch (OutOfMemoryError oome) {
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chain = null;
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}
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System.gc();
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Thread.sleep(100);
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}
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}
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}
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