62 lines
2.0 KiB
Java
62 lines
2.0 KiB
Java
/*
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* Copyright (c) 2017, 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 com.sun.tools.attach.VirtualMachine;
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import java.io.IOException;
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/**
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* @test
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* @modules jdk.attach
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* @run main AttachSelf
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* @run main/othervm -Djdk.attach.allowAttachSelf AttachSelf
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* @run main/othervm -Djdk.attach.allowAttachSelf=true AttachSelf
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* @run main/othervm -Djdk.attach.allowAttachSelf=false AttachSelf
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*/
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public class AttachSelf {
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public static void main(String[] args) throws Exception {
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String value = System.getProperty("jdk.attach.allowAttachSelf");
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boolean canAttachSelf = (value != null) && !value.equals("false");
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String vmid = "" + ProcessHandle.current().pid();
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VirtualMachine vm = null;
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try {
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vm = VirtualMachine.attach(vmid);
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if (!canAttachSelf)
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throw new RuntimeException("Attached to self not expected");
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} catch (IOException ioe) {
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if (canAttachSelf)
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throw ioe;
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} finally {
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if (vm != null) vm.detach();
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}
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}
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}
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