author | dl |
Wed, 25 Nov 2015 18:30:07 -0800 | |
changeset 34342 | e1c730ea5a0b |
parent 33668 | adec7a209e05 |
child 35768 | 7066da300a08 |
permissions | -rw-r--r-- |
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/* |
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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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* This file is available under and governed by the GNU General Public |
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* License version 2 only, as published by the Free Software Foundation. |
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* However, the following notice accompanied the original version of this |
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* file: |
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* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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*/ |
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/* |
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* @test |
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* @bug 6445158 |
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* @key intermittent |
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* @summary Basic tests for Phaser |
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* @author Chris Hegarty |
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*/ |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import static java.util.concurrent.TimeUnit.NANOSECONDS; |
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import static java.util.concurrent.TimeUnit.SECONDS; |
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import java.lang.management.ManagementFactory; |
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import java.lang.management.ThreadInfo; |
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import java.lang.management.ThreadMXBean; |
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import java.util.Iterator; |
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import java.util.LinkedList; |
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import java.util.concurrent.Phaser; |
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import java.util.concurrent.TimeUnit; |
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import java.util.concurrent.TimeoutException; |
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import java.util.concurrent.atomic.AtomicInteger; |
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public class Basic { |
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private static void checkTerminated(final Phaser phaser) { |
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check(phaser.isTerminated()); |
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int unarriverParties = phaser.getUnarrivedParties(); |
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int registeredParties = phaser.getRegisteredParties(); |
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int phase = phaser.getPhase(); |
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check(phase < 0); |
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equal(phase, phaser.arrive()); |
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equal(phase, phaser.arriveAndDeregister()); |
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equal(phase, phaser.arriveAndAwaitAdvance()); |
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equal(phase, phaser.bulkRegister(10)); |
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equal(phase, phaser.register()); |
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try { |
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equal(phase, phaser.awaitAdvanceInterruptibly(0)); |
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equal(phase, phaser.awaitAdvanceInterruptibly(0, 10, SECONDS)); |
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} catch (Exception ie) { |
73 |
unexpected(ie); |
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} |
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equal(phaser.getUnarrivedParties(), unarriverParties); |
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equal(phaser.getRegisteredParties(), registeredParties); |
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} |
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private static void checkResult(Arriver a, Class<? extends Throwable> c) { |
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Throwable t = a.result(); |
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if (! ((t == null && c == null) || (c != null && c.isInstance(t)))) { |
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// t.printStackTrace(); |
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fail("Mismatch in thread " + |
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a.getName() + ": " + |
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t + ", " + |
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(c == null ? "<null>" : c.getName())); |
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} else { |
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pass(); |
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} |
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} |
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//---------------------------------------------------------------- |
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// Mechanism to get all test threads into "running" mode. |
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//---------------------------------------------------------------- |
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private static Phaser startingGate = new Phaser(3); |
4110 | 96 |
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private static void toTheStartingGate() { |
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try { |
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boolean expectNextPhase = (startingGate.getUnarrivedParties() == 1); |
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int phase = startingGate.getPhase(); |
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equal(phase, startingGate.arrive()); |
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int awaitPhase; |
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for (boolean interrupted = false;;) { |
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try { |
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awaitPhase = startingGate.awaitAdvanceInterruptibly |
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(phase, 30, SECONDS); |
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if (interrupted) Thread.currentThread().interrupt(); |
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break; |
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} catch (InterruptedException ie) { |
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interrupted = true; |
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} |
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} |
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if (expectNextPhase) check(awaitPhase == phase + 1); |
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else check(awaitPhase == phase || awaitPhase == phase + 1); |
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pass(); |
116 |
} catch (Throwable t) { |
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unexpected(t); |
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// reset(startingGate); |
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throw new Error(t); |
120 |
} |
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} |
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//---------------------------------------------------------------- |
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// Convenience methods for creating threads that call arrive, |
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// awaitAdvance, arriveAndAwaitAdvance, awaitAdvanceInterruptibly |
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//---------------------------------------------------------------- |
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private abstract static class Arriver extends Thread { |
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static AtomicInteger count = new AtomicInteger(1); |
129 |
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Arriver() { |
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this("Arriver"); |
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} |
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Arriver(String name) { |
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this.setName(name + ":" + count.getAndIncrement()); |
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this.setDaemon(true); |
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} |
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private volatile Throwable result; |
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private volatile int phase; |
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protected void result(Throwable result) { this.result = result; } |
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public Throwable result() { return this.result; } |
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protected void phase(int phase) { this.phase = phase; } |
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public int phase() { return this.phase; } |
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} |
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private abstract static class Awaiter extends Arriver { |
4110 | 148 |
Awaiter() { super("Awaiter"); } |
149 |
Awaiter(String name) { super(name); } |
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150 |
} |
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151 |
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152 |
private static Arriver arriver(final Phaser phaser) { |
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153 |
return new Arriver() { public void run() { |
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154 |
toTheStartingGate(); |
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155 |
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156 |
try { phase(phaser.arrive()); } |
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catch (Throwable result) { result(result); }}}; |
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158 |
} |
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159 |
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160 |
private static AtomicInteger cycleArriveAwaitAdvance = new AtomicInteger(1); |
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161 |
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162 |
private static Awaiter awaiter(final Phaser phaser) { |
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163 |
return new Awaiter() { public void run() { |
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164 |
toTheStartingGate(); |
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165 |
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166 |
try { |
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167 |
if (cycleArriveAwaitAdvance.getAndIncrement() % 2 == 0) |
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168 |
phase(phaser.awaitAdvance(phaser.arrive())); |
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169 |
else |
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170 |
phase(phaser.arriveAndAwaitAdvance()); |
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171 |
} catch (Throwable result) { result(result); }}}; |
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172 |
} |
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173 |
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174 |
private static Awaiter awaiter(final Phaser phaser, |
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175 |
final long timeout, |
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176 |
final TimeUnit unit) { |
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177 |
return new Awaiter("InterruptibleWaiter") { public void run() { |
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178 |
toTheStartingGate(); |
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179 |
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180 |
try { |
|
181 |
if (timeout < 0) |
|
182 |
phase(phaser.awaitAdvanceInterruptibly(phaser.arrive())); |
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183 |
else |
|
184 |
phase(phaser.awaitAdvanceInterruptibly(phaser.arrive(), |
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185 |
timeout, |
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186 |
unit)); |
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187 |
} catch (Throwable result) { result(result); }}}; |
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188 |
} |
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189 |
||
190 |
// Returns an infinite lazy list of all possible arriver/awaiter combinations. |
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191 |
private static Iterator<Arriver> arriverIterator(final Phaser phaser) { |
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192 |
return new Iterator<Arriver>() { |
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193 |
int i = 0; |
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194 |
public boolean hasNext() { return true; } |
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195 |
public Arriver next() { |
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196 |
switch ((i++)&7) { |
|
197 |
case 0: case 4: |
|
198 |
return arriver(phaser); |
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199 |
case 1: case 5: |
|
200 |
return awaiter(phaser); |
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201 |
case 2: case 6: case 7: |
|
202 |
return awaiter(phaser, -1, SECONDS); |
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203 |
default: |
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return awaiter(phaser, 30, SECONDS); }} |
4110 | 205 |
public void remove() {throw new UnsupportedOperationException();}}; |
206 |
} |
|
207 |
||
208 |
// Returns an infinite lazy list of all possible awaiter only combinations. |
|
209 |
private static Iterator<Awaiter> awaiterIterator(final Phaser phaser) { |
|
210 |
return new Iterator<Awaiter>() { |
|
211 |
int i = 0; |
|
212 |
public boolean hasNext() { return true; } |
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213 |
public Awaiter next() { |
|
214 |
switch ((i++)&7) { |
|
215 |
case 1: case 4: case 7: |
|
216 |
return awaiter(phaser); |
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217 |
case 2: case 5: |
|
218 |
return awaiter(phaser, -1, SECONDS); |
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219 |
default: |
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return awaiter(phaser, 30, SECONDS); }} |
4110 | 221 |
public void remove() {throw new UnsupportedOperationException();}}; |
222 |
} |
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223 |
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static class SimpleTimer { |
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225 |
long startTime = System.nanoTime(); |
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226 |
long elapsedMillis() { |
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long now = System.nanoTime(); |
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long elapsed = NANOSECONDS.toMillis(now - startTime); |
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startTime = now; |
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return elapsed; |
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231 |
} |
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void printElapsed() { System.out.println(elapsedMillis() + " ms"); } |
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233 |
} |
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234 |
|
4110 | 235 |
private static void realMain(String[] args) throws Throwable { |
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236 |
SimpleTimer timer = new SimpleTimer(); |
4110 | 237 |
Thread.currentThread().setName("mainThread"); |
238 |
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239 |
//---------------------------------------------------------------- |
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240 |
System.out.print("Normal use: "); |
4110 | 241 |
//---------------------------------------------------------------- |
242 |
try { |
|
243 |
Phaser phaser = new Phaser(3); |
|
244 |
equal(phaser.getRegisteredParties(), 3); |
|
245 |
equal(phaser.getArrivedParties(), 0); |
|
246 |
equal(phaser.getPhase(), 0); |
|
247 |
check(phaser.getRoot().equals(phaser)); |
|
248 |
equal(phaser.getParent(), null); |
|
249 |
check(!phaser.isTerminated()); |
|
250 |
||
251 |
Iterator<Arriver> arrivers = arriverIterator(phaser); |
|
252 |
int phase = 0; |
|
253 |
for (int i = 0; i < 10; i++) { |
|
254 |
equal(phaser.getPhase(), phase++); |
|
255 |
Arriver a1 = arrivers.next(); a1.start(); |
|
256 |
Arriver a2 = arrivers.next(); a2.start(); |
|
257 |
toTheStartingGate(); |
|
258 |
phaser.arriveAndAwaitAdvance(); |
|
259 |
a1.join(); |
|
260 |
a2.join(); |
|
261 |
checkResult(a1, null); |
|
262 |
checkResult(a2, null); |
|
263 |
check(!phaser.isTerminated()); |
|
264 |
equal(phaser.getRegisteredParties(), 3); |
|
265 |
equal(phaser.getArrivedParties(), 0); |
|
266 |
} |
|
267 |
} catch (Throwable t) { unexpected(t); } |
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268 |
timer.printElapsed(); |
4110 | 269 |
|
270 |
//---------------------------------------------------------------- |
|
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271 |
System.out.print("One thread interrupted: "); |
4110 | 272 |
//---------------------------------------------------------------- |
273 |
try { |
|
274 |
Phaser phaser = new Phaser(3); |
|
275 |
Iterator<Arriver> arrivers = arriverIterator(phaser); |
|
276 |
int phase = phaser.getPhase(); |
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for (int i = 0; i < 10; i++) { |
4110 | 278 |
check(phaser.getPhase() == phase); |
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279 |
Awaiter a1 = awaiter(phaser, 30, SECONDS); a1.start(); |
4110 | 280 |
Arriver a2 = arrivers.next(); a2.start(); |
281 |
toTheStartingGate(); |
|
282 |
a1.interrupt(); |
|
283 |
a1.join(); |
|
284 |
phaser.arriveAndAwaitAdvance(); |
|
285 |
a2.join(); |
|
286 |
checkResult(a1, InterruptedException.class); |
|
287 |
checkResult(a2, null); |
|
288 |
check(!phaser.isTerminated()); |
|
289 |
equal(phaser.getRegisteredParties(), 3); |
|
290 |
equal(phaser.getArrivedParties(), 0); |
|
291 |
phase++; |
|
292 |
} |
|
293 |
} catch (Throwable t) { unexpected(t); } |
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timer.printElapsed(); |
4110 | 295 |
|
296 |
//---------------------------------------------------------------- |
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System.out.print("Phaser is terminated while threads are waiting: "); |
4110 | 298 |
//---------------------------------------------------------------- |
299 |
try { |
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for (int i = 0; i < 10; i++) { |
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301 |
Phaser phaser = new Phaser(3); |
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302 |
Iterator<Awaiter> awaiters = awaiterIterator(phaser); |
4110 | 303 |
Arriver a1 = awaiters.next(); a1.start(); |
304 |
Arriver a2 = awaiters.next(); a2.start(); |
|
305 |
toTheStartingGate(); |
|
306 |
while (phaser.getArrivedParties() < 2) Thread.yield(); |
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307 |
equal(0, phaser.getPhase()); |
4110 | 308 |
phaser.forceTermination(); |
309 |
a1.join(); |
|
310 |
a2.join(); |
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equal(0 + Integer.MIN_VALUE, a1.phase); |
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equal(0 + Integer.MIN_VALUE, a2.phase); |
4110 | 313 |
int arrivedParties = phaser.getArrivedParties(); |
314 |
checkTerminated(phaser); |
|
315 |
equal(phaser.getArrivedParties(), arrivedParties); |
|
316 |
} |
|
317 |
} catch (Throwable t) { unexpected(t); } |
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|
318 |
timer.printElapsed(); |
4110 | 319 |
|
320 |
//---------------------------------------------------------------- |
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|
321 |
System.out.print("Adds new unarrived parties to this phaser: "); |
4110 | 322 |
//---------------------------------------------------------------- |
323 |
try { |
|
324 |
Phaser phaser = new Phaser(1); |
|
325 |
Iterator<Arriver> arrivers = arriverIterator(phaser); |
|
326 |
LinkedList<Arriver> arriverList = new LinkedList<Arriver>(); |
|
327 |
int phase = phaser.getPhase(); |
|
328 |
for (int i = 1; i < 5; i++) { |
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|
329 |
startingGate = new Phaser(1+(3*i)); |
4110 | 330 |
check(phaser.getPhase() == phase); |
331 |
// register 3 more |
|
332 |
phaser.register(); phaser.register(); phaser.register(); |
|
333 |
for (int z=0; z<(3*i); z++) { |
|
334 |
arriverList.add(arrivers.next()); |
|
335 |
} |
|
336 |
for (Arriver arriver : arriverList) |
|
337 |
arriver.start(); |
|
338 |
||
339 |
toTheStartingGate(); |
|
340 |
phaser.arriveAndAwaitAdvance(); |
|
341 |
||
342 |
for (Arriver arriver : arriverList) { |
|
343 |
arriver.join(); |
|
344 |
checkResult(arriver, null); |
|
345 |
} |
|
346 |
equal(phaser.getRegisteredParties(), 1 + (3*i)); |
|
347 |
equal(phaser.getArrivedParties(), 0); |
|
348 |
arriverList.clear(); |
|
349 |
phase++; |
|
350 |
} |
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351 |
startingGate = new Phaser(3); |
4110 | 352 |
} catch (Throwable t) { unexpected(t); } |
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|
353 |
timer.printElapsed(); |
4110 | 354 |
|
355 |
//---------------------------------------------------------------- |
|
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|
356 |
System.out.print("One thread timed out: "); |
4110 | 357 |
//---------------------------------------------------------------- |
358 |
try { |
|
359 |
Phaser phaser = new Phaser(3); |
|
360 |
Iterator<Arriver> arrivers = arriverIterator(phaser); |
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|
361 |
for (long timeout : new long[] { 0L, 12L }) { |
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|
362 |
Awaiter a1 = awaiter(phaser, timeout, MILLISECONDS); |
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|
363 |
a1.start(); |
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|
364 |
Arriver a2 = arrivers.next(); |
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|
365 |
a2.start(); |
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|
366 |
toTheStartingGate(); |
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|
367 |
a1.join(); |
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|
368 |
checkResult(a1, TimeoutException.class); |
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|
369 |
phaser.arrive(); |
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|
370 |
a2.join(); |
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|
371 |
checkResult(a2, null); |
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|
372 |
check(!phaser.isTerminated()); |
4110 | 373 |
} |
374 |
} catch (Throwable t) { unexpected(t); } |
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|
375 |
timer.printElapsed(); |
4110 | 376 |
|
377 |
//---------------------------------------------------------------- |
|
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|
378 |
System.out.print("Barrier action completed normally: "); |
4110 | 379 |
//---------------------------------------------------------------- |
380 |
try { |
|
381 |
final AtomicInteger count = new AtomicInteger(0); |
|
382 |
final Phaser[] kludge = new Phaser[1]; |
|
383 |
Phaser phaser = new Phaser(3) { |
|
384 |
@Override |
|
385 |
protected boolean onAdvance(int phase, int registeredParties) { |
|
386 |
int countPhase = count.getAndIncrement(); |
|
387 |
equal(countPhase, phase); |
|
388 |
equal(kludge[0].getPhase(), phase); |
|
389 |
equal(kludge[0].getRegisteredParties(), registeredParties); |
|
390 |
if (phase >= 3) |
|
391 |
return true; // terminate |
|
392 |
||
393 |
return false; |
|
394 |
} |
|
395 |
}; |
|
396 |
kludge[0] = phaser; |
|
397 |
equal(phaser.getRegisteredParties(), 3); |
|
398 |
Iterator<Awaiter> awaiters = awaiterIterator(phaser); |
|
399 |
for (int i = 0; i < 4; i++) { |
|
400 |
Awaiter a1 = awaiters.next(); a1.start(); |
|
401 |
Awaiter a2 = awaiters.next(); a2.start(); |
|
402 |
toTheStartingGate(); |
|
403 |
while (phaser.getArrivedParties() < 2) Thread.yield(); |
|
404 |
phaser.arrive(); |
|
405 |
a1.join(); |
|
406 |
a2.join(); |
|
407 |
checkResult(a1, null); |
|
408 |
checkResult(a2, null); |
|
409 |
equal(count.get(), i+1); |
|
410 |
if (i < 3) { |
|
411 |
check(!phaser.isTerminated()); |
|
412 |
equal(phaser.getRegisteredParties(), 3); |
|
413 |
equal(phaser.getArrivedParties(), 0); |
|
414 |
equal(phaser.getUnarrivedParties(), 3); |
|
415 |
equal(phaser.getPhase(), count.get()); |
|
416 |
} else |
|
417 |
checkTerminated(phaser); |
|
418 |
} |
|
419 |
} catch (Throwable t) { unexpected(t); } |
|
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changeset
|
420 |
timer.printElapsed(); |
4110 | 421 |
|
422 |
} |
|
423 |
||
424 |
//--------------------- Infrastructure --------------------------- |
|
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changeset
|
425 |
|
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8141031: java/util/concurrent/Phaser/Basic.java starts failing intermittently
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changeset
|
426 |
/** |
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8141031: java/util/concurrent/Phaser/Basic.java starts failing intermittently
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changeset
|
427 |
* A debugging tool to print stack traces of most threads, as jstack does. |
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changeset
|
428 |
* Uninteresting threads are filtered out. |
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changeset
|
429 |
*/ |
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changeset
|
430 |
static void dumpTestThreads() { |
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8141031: java/util/concurrent/Phaser/Basic.java starts failing intermittently
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changeset
|
431 |
ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean(); |
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changeset
|
432 |
System.err.println("------ stacktrace dump start ------"); |
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changeset
|
433 |
for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) { |
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8141031: java/util/concurrent/Phaser/Basic.java starts failing intermittently
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changeset
|
434 |
String name = info.getThreadName(); |
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8141031: java/util/concurrent/Phaser/Basic.java starts failing intermittently
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changeset
|
435 |
if ("Signal Dispatcher".equals(name)) |
e1c730ea5a0b
8141031: java/util/concurrent/Phaser/Basic.java starts failing intermittently
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changeset
|
436 |
continue; |
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8141031: java/util/concurrent/Phaser/Basic.java starts failing intermittently
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changeset
|
437 |
if ("Reference Handler".equals(name) |
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8141031: java/util/concurrent/Phaser/Basic.java starts failing intermittently
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changeset
|
438 |
&& info.getLockName().startsWith("java.lang.ref.Reference$Lock")) |
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8141031: java/util/concurrent/Phaser/Basic.java starts failing intermittently
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changeset
|
439 |
continue; |
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8141031: java/util/concurrent/Phaser/Basic.java starts failing intermittently
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changeset
|
440 |
if ("Finalizer".equals(name) |
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8141031: java/util/concurrent/Phaser/Basic.java starts failing intermittently
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changeset
|
441 |
&& info.getLockName().startsWith("java.lang.ref.ReferenceQueue$Lock")) |
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8141031: java/util/concurrent/Phaser/Basic.java starts failing intermittently
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changeset
|
442 |
continue; |
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8141031: java/util/concurrent/Phaser/Basic.java starts failing intermittently
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changeset
|
443 |
if ("process reaper".equals(name)) |
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8141031: java/util/concurrent/Phaser/Basic.java starts failing intermittently
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changeset
|
444 |
continue; |
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8141031: java/util/concurrent/Phaser/Basic.java starts failing intermittently
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changeset
|
445 |
if (name != null && name.startsWith("ForkJoinPool.commonPool-worker")) |
e1c730ea5a0b
8141031: java/util/concurrent/Phaser/Basic.java starts failing intermittently
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changeset
|
446 |
continue; |
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8141031: java/util/concurrent/Phaser/Basic.java starts failing intermittently
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changeset
|
447 |
System.err.print(info); |
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8141031: java/util/concurrent/Phaser/Basic.java starts failing intermittently
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changeset
|
448 |
} |
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8141031: java/util/concurrent/Phaser/Basic.java starts failing intermittently
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changeset
|
449 |
System.err.println("------ stacktrace dump end ------"); |
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8141031: java/util/concurrent/Phaser/Basic.java starts failing intermittently
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changeset
|
450 |
} |
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8141031: java/util/concurrent/Phaser/Basic.java starts failing intermittently
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changeset
|
451 |
|
4110 | 452 |
static volatile int passed = 0, failed = 0; |
453 |
static void pass() {passed++;} |
|
454 |
static void fail() {failed++; Thread.dumpStack();} |
|
455 |
static void fail(String msg) {System.out.println(msg); fail();} |
|
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changeset
|
456 |
static void unexpected(Throwable t) {failed++; t.printStackTrace(); dumpTestThreads();} |
4110 | 457 |
static void check(boolean cond) {if (cond) pass(); else fail();} |
458 |
static void equal(Object x, Object y) { |
|
459 |
if (x == null ? y == null : x.equals(y)) pass(); |
|
460 |
else fail(x + " not equal to " + y);} |
|
461 |
public static void main(String[] args) throws Throwable { |
|
462 |
try {realMain(args);} catch (Throwable t) {unexpected(t);} |
|
463 |
System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed); |
|
464 |
if (failed > 0) throw new AssertionError("Some tests failed");} |
|
465 |
} |