52 lines
1.8 KiB
Java
52 lines
1.8 KiB
Java
/*
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* Copyright (c) 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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import java.lang.instrument.*;
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public class GetObjectSizeClassAgent {
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static Instrumentation instrumentation;
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public static void premain(String agentArgs, Instrumentation instrumentation) {
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GetObjectSizeClassAgent.instrumentation = instrumentation;
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}
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public static void main(String[] args) throws Exception {
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long sizeA = instrumentation.getObjectSize(A.class);
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long sizeB = instrumentation.getObjectSize(B.class);
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if (sizeA != sizeB) {
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throw new RuntimeException("java.lang.Class sizes disagree: " + sizeA + " vs. " + sizeB);
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}
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System.out.println("GetObjectSizeClass passed");
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}
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static class A {
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}
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static class B {
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void m() {}
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}
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}
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