author | stsmirno |
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/* |
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* Copyright (c) 2015, 2016, 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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/* |
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* @test |
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* @bug 8143157 |
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* @summary vmoperation=debug should have logging output |
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* @library /test/lib |
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* @modules java.base/jdk.internal.misc |
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* java.management |
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* @run driver VMOperationTest |
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*/ |
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import java.lang.ref.WeakReference; |
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import jdk.test.lib.process.OutputAnalyzer; |
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import jdk.test.lib.process.ProcessTools; |
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public class VMOperationTest { |
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public static void main(String[] args) throws Exception { |
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ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-Xlog:vmoperation=debug", |
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"-Xmx64m", |
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"-Xms64m", |
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InternalClass.class.getName()); |
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OutputAnalyzer output = new OutputAnalyzer(pb.start()); |
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output.shouldContain("VM_Operation ("); |
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output.shouldHaveExitValue(0); |
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} |
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public static class InternalClass { |
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public static byte[] garbage; |
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public static volatile WeakReference<Object> weakref; |
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public static void createweakref() { |
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Object o = new Object(); |
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weakref = new WeakReference<>(o); |
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} |
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// Loop until a GC runs. |
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public static void main(String[] args) throws Exception { |
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createweakref(); |
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while (weakref.get() != null) { |
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garbage = new byte[8192]; |
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System.gc(); |
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} |
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} |
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} |
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} |
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