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8135188: RunFinalizationTest.java Exception java.lang.Error: Test failure: Object was not finalized

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Reviewed-by: dcubed, martin
This commit is contained in:
Jaroslav Bachorik 2015-10-15 17:35:42 +02:00
parent f2b8803873
commit 7b389d3533
2 changed files with 140 additions and 68 deletions
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124
hotspot/test/serviceability/dcmd/gc/FinalizationRunner.java Normal file
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@ -0,0 +1,124 @@
/*
* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.util.concurrent.CountDownLatch;
import jdk.test.lib.dcmd.CommandExecutor;
import jdk.test.lib.dcmd.JMXExecutor;
public class FinalizationRunner {
public static final String FAILED = "Failed";
public static final String PASSED = "Passed";
static volatile boolean wasFinalized = false;
private static final CountDownLatch finRunLatch = new CountDownLatch(1);
private static final CountDownLatch finBlockLatch = new CountDownLatch(1);
static class MyObject {
@Override
protected void finalize() {
if (Thread.currentThread().getName().equals("Finalizer")) {
try {
System.out.println("inside the regular finalizer thread; blocking");
// 'regular' finalizer thread is ready to be effectively blocked -
// we can continue with the GC.run_finalization test
finRunLatch.countDown();
// prevent the 'regular' finalizer from finalizing this instance
// until the GC.run_finalization has had its chance to do so
finBlockLatch.await();
} catch (InterruptedException e) {
}
} else {
if (Thread.currentThread().getName().equals("Secondary finalizer")) {
System.out.println("finalizing the test instance");
// finalizing on behalf of GC.run_finalization -
// unblock the 'regular' finalizer and the test main method
wasFinalized = true;
} else {
fail("Unexpected finalizer thread name: " +
Thread.currentThread().getName());
}
finBlockLatch.countDown();
}
}
}
// this instance will be used to provoke the regular finalization
// so the finalizer thread can be blocked for the duration of
// GC.run_finalization test
public static MyObject o1;
// this instance will be used to perform the GC.run_finalization test
public static MyObject o2;
private static void run(CommandExecutor executor) {
o2 = new MyObject();
o2 = null;
System.out.println("running GC.run_finalization");
System.gc();
executor.execute("GC.run_finalization");
System.out.println("Waiting for finalization");
try {
finBlockLatch.await();
if (wasFinalized) {
System.out.println(PASSED + ": Object was finalized");
} else {
fail("Object was not finalized");
}
} catch (InterruptedException e) {
fail("Interrupted while waiting for finalization", e);
}
}
public static void main(String ... args) {
System.out.println("\n=== FinalizationRunner");
try {
blockFinalizerThread();
Runtime.getRuntime().addShutdownHook(new Thread(()->{
run(new JMXExecutor());
}));
} catch (InterruptedException e) {
fail("Interrupted while trying to block the finalizer thread", e);
}
}
private static void blockFinalizerThread() throws InterruptedException {
System.out.println("trying to block the finalizer thread");
o1 = new MyObject();
o1 = null;
System.gc();
finRunLatch.await();
}
private static void fail(String msg, Exception e) {
fail(msg);
e.printStackTrace(System.err);
}
private static void fail(String msg) {
System.err.println(FAILED + ": " + msg);
}
}

84
hotspot/test/serviceability/dcmd/gc/RunFinalizationTest.java
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@ -21,13 +21,11 @@
* questions.
*/
import java.util.concurrent.Phaser;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.ArrayList;
import java.util.List;
import jdk.test.lib.dcmd.CommandExecutor;
import jdk.test.lib.dcmd.JMXExecutor;
import jdk.test.lib.Utils;
import jdk.test.lib.OutputAnalyzer;
import jdk.test.lib.ProcessTools;
/*
* @test
@ -39,71 +37,21 @@ import jdk.test.lib.Utils;
* jdk.jvmstat/sun.jvmstat.monitor
* @build jdk.test.lib.*
* @build jdk.test.lib.dcmd.*
* @run main/othervm RunFinalizationTest
* @build RunFinalizationTest FinalizationRunner
* @run main RunFinalizationTest
*/
public class RunFinalizationTest {
private static final long TIMEOUT = Utils.adjustTimeout(15000); // 15s
private static final Phaser ph = new Phaser(3);
static volatile boolean wasFinalized = false;
static volatile boolean wasInitialized = false;
private final static String TEST_APP_NAME = "FinalizationRunner";
static class MyObject {
public MyObject() {
/* Make sure object allocation/deallocation is not optimized out */
wasInitialized = true;
}
public static void main(String ... args) throws Exception {
List<String> javaArgs = new ArrayList<>();
javaArgs.add("-cp");
javaArgs.add(System.getProperty("test.class.path"));
javaArgs.add(TEST_APP_NAME);
ProcessBuilder testAppPb = ProcessTools.createJavaProcessBuilder(javaArgs.toArray(new String[javaArgs.size()]));
protected void finalize() {
if (!Thread.currentThread().getName().equals("Finalizer")) {
wasFinalized = true;
ph.arrive();
} else {
ph.arriveAndAwaitAdvance();
}
}
}
public static MyObject o;
private static void run(CommandExecutor executor) {
o = new MyObject();
o = null;
System.gc();
executor.execute("GC.run_finalization");
System.out.println("Waiting for signal from finalizer");
long targetTime = System.currentTimeMillis() + TIMEOUT;
while (System.currentTimeMillis() < targetTime) {
try {
ph.awaitAdvanceInterruptibly(ph.arrive(), 200, TimeUnit.MILLISECONDS);
System.out.println("Received signal");
break;
} catch (InterruptedException e) {
fail("Test error: Interrupted while waiting for signal from finalizer", e);
} catch (TimeoutException e) {
System.out.println("Haven't received signal in 200ms. Retrying ...");
}
}
if (!wasFinalized) {
fail("Test failure: Object was not finalized");
}
}
public static void main(String ... args) {
MyObject o = new MyObject();
o = null;
Runtime.getRuntime().addShutdownHook(new Thread(()->{
run(new JMXExecutor());
}));
}
private static void fail(String msg, Exception e) {
throw new Error(msg, e);
}
private static void fail(String msg) {
throw new Error(msg);
OutputAnalyzer out = ProcessTools.executeProcess(testAppPb);
out.stderrShouldNotMatch("^" + FinalizationRunner.FAILED + ".*")
.stdoutShouldMatch("^" + FinalizationRunner.PASSED + ".*");
}
}