jdk/test/sun/security/provider/SeedGenerator/Priority_Inversion.java
author bobv
Thu, 02 Dec 2010 14:00:03 -0500
changeset 7407 47339ceb8cb0
parent 5506 202f599c92aa
child 30046 cf2c86e1819e
permissions -rw-r--r--
7004217: Remove IA64 workaround re-introduced with CR6953477 Summary: gcc bug worksaround for IA64 no longer needed Reviewed-by: andrew
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/*
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 * Copyright (c) 1998, 1999, 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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/*
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 * @test
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 * @bug 4146462
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 * @summary Priority inversion prevents call to the genSeed method from
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 *      returning
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 *
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 * if the test returns, then it passed.
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 * if the test never returns (hangs forever), then it failed.
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 */
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import java.security.SecureRandom;
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public class Priority_Inversion {
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    public static void main(String args[]) {
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        int deltaPriority = 1;
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        if (args.length == 1) {
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            try {
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                deltaPriority = Integer.parseInt(args[0]);
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            }
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            catch (NumberFormatException nfe) {
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                System.err.println
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                        ("Sorry, \"" + args[0] + "\" is not a number");
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                System.exit(1);
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            }
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        }
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        RandomTest rand = new RandomTest();
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        InvertTest invert = new InvertTest(deltaPriority, rand);
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        rand.start();
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        invert.start();
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    }
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}
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class RandomTest extends Thread {
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    public synchronized void run() {
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        System.out.println("Start priority " + getPriority());
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        // The following should take over a second
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        SecureRandom rand = new SecureRandom();
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        rand.nextBytes(new byte[5]);
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    }
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    void invertPriority() {
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        System.out.println("Waiting ..., priority " +
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                Thread.currentThread().getPriority());
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        synchronized(this) {
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        }
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        System.out.println("Released Lock");
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    }
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}
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class InvertTest extends Thread {
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    private int delta;
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    private RandomTest rand;
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    InvertTest(int delta, RandomTest rand) {
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        this.delta = delta;
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        this.rand = rand;
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    }
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    public void run() {
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        setPriority(getPriority() + delta);
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        try {
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            sleep(500);
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        }
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        catch (InterruptedException ie) { }
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        rand.invertPriority();
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    }
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}