1 /*
   2  * Copyright (c) 2004, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @bug 5050487
  27  * @summary Check that Instrumentation methods can execute from a runtime
  28  *          shutdown hook
  29  * @modules java.instrument
  30  * @run build FromShutdownHook
  31  * @run shell MakeJAR.sh basicAgent
  32  * @run main/othervm -javaagent:basicAgent.jar FromShutdownHook FromShutdownHook
  33  */
  34 import java.lang.instrument.Instrumentation;
  35 
  36 public class FromShutdownHook
  37     extends ASimpleInstrumentationTestCase
  38 {
  39     public FromShutdownHook(String name) {
  40         super(name);
  41     }
  42     public static void main(String args[] ) throws Throwable {
  43         FromShutdownHook fsh = new FromShutdownHook(args[0]);
  44         fsh.runTest();
  45     }
  46 
  47     Instrumentation ins;
  48 
  49     protected final void doRunTest() {
  50         // keep reference to Instrumentation
  51         ins = fInst;
  52 
  53         // install shutdown hook
  54         Runtime.getRuntime().addShutdownHook(new Thread() {
  55             public void run() {
  56                 System.err.println(ins.getAllLoadedClasses().length +
  57                         " classes loaded.");
  58             }
  59         });
  60     }
  61 }