0N/A/*
2362N/A * Copyright (c) 1998, 1999, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
0N/A */
0N/A
0N/A/*
0N/A * @test
0N/A * @bug 4146462
0N/A * @summary Priority inversion prevents call to the genSeed method from
0N/A * returning
0N/A *
0N/A * if the test returns, then it passed.
0N/A * if the test never returns (hangs forever), then it failed.
0N/A */
0N/A
0N/Aimport java.security.SecureRandom;
0N/A
0N/Apublic class Priority_Inversion {
0N/A public static void main(String args[]) {
0N/A int deltaPriority = 1;
0N/A
0N/A if (args.length == 1) {
0N/A try {
0N/A deltaPriority = Integer.parseInt(args[0]);
0N/A }
0N/A catch (NumberFormatException nfe) {
0N/A System.err.println
0N/A ("Sorry, \"" + args[0] + "\" is not a number");
0N/A System.exit(1);
0N/A }
0N/A }
0N/A
0N/A RandomTest rand = new RandomTest();
0N/A InvertTest invert = new InvertTest(deltaPriority, rand);
0N/A rand.start();
0N/A invert.start();
0N/A }
0N/A}
0N/A
0N/Aclass RandomTest extends Thread {
0N/A public synchronized void run() {
0N/A System.out.println("Start priority " + getPriority());
0N/A // The following should take over a second
0N/A SecureRandom rand = new SecureRandom();
0N/A rand.nextBytes(new byte[5]);
0N/A }
0N/A
0N/A void invertPriority() {
0N/A System.out.println("Waiting ..., priority " +
0N/A Thread.currentThread().getPriority());
0N/A synchronized(this) {
0N/A }
0N/A System.out.println("Released Lock");
0N/A }
0N/A}
0N/Aclass InvertTest extends Thread {
0N/A private int delta;
0N/A private RandomTest rand;
0N/A
0N/A InvertTest(int delta, RandomTest rand) {
0N/A this.delta = delta;
0N/A this.rand = rand;
0N/A }
0N/A
0N/A public void run() {
0N/A setPriority(getPriority() + delta);
0N/A try {
0N/A sleep(500);
0N/A }
0N/A catch (InterruptedException ie) { }
0N/A rand.invertPriority();
0N/A }
0N/A}