FromShutdownHook.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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 * 2 along with this work; if not, write to the Free Software Foundation,
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/*
 * @test
 * @bug 5050487
 * @summary Check that Instrumentation methods can execute from a runtime
 *          shutdown hook
 * @run build FromShutdownHook
 * @run shell MakeJAR.sh basicAgent
 * @run main/othervm -javaagent:basicAgent.jar FromShutdownHook FromShutdownHook
 */
import java.lang.instrument.Instrumentation;

public class FromShutdownHook
    extends ASimpleInstrumentationTestCase
{
    public FromShutdownHook(String name) {
        super(name);
    }
    public static void main(String args[] ) throws Throwable {
        FromShutdownHook fsh = new FromShutdownHook(args[0]);
        fsh.runTest();
    }

    Instrumentation ins;

    protected final void doRunTest() {
        // keep reference to Instrumentation
        ins = fInst;

        // install shutdown hook
        Runtime.getRuntime().addShutdownHook(new Thread() {
            public void run() {
                System.err.println(ins.getAllLoadedClasses().length +
                        " classes loaded.");
            }
        });
    }
}