| /* |
| * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| import com.sun.tools.attach.VirtualMachine; |
| |
| import java.io.IOException; |
| |
| /** |
| * @test |
| * @modules jdk.attach |
| * @run main AttachSelf |
| * @run main/othervm -Djdk.attach.allowAttachSelf AttachSelf |
| * @run main/othervm -Djdk.attach.allowAttachSelf=true AttachSelf |
| * @run main/othervm -Djdk.attach.allowAttachSelf=false AttachSelf |
| */ |
| |
| public class AttachSelf { |
| |
| public static void main(String[] args) throws Exception { |
| |
| String value = System.getProperty("jdk.attach.allowAttachSelf"); |
| boolean canAttachSelf = (value != null) && !value.equals("false"); |
| |
| String vmid = "" + ProcessHandle.current().pid(); |
| |
| VirtualMachine vm = null; |
| try { |
| vm = VirtualMachine.attach(vmid); |
| if (!canAttachSelf) |
| throw new RuntimeException("Attached to self not expected"); |
| } catch (IOException ioe) { |
| if (canAttachSelf) |
| throw ioe; |
| } finally { |
| if (vm != null) vm.detach(); |
| } |
| |
| } |
| |
| } |
| |