blob: d75831720ebc87b7a044c16cfd6e29e2599771e8 [file] [log] [blame]
/*
* Copyright (C) 2011 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package libcore.java.lang.ref;
/**
* Triggers finalizers to run. Note that live-precise bugs may interfere with
* analysis of what is reachable. Unreachable references in local frames may not
* be finalized even after a call to {@link #induceFinalization}. To work
* around, create finalizable objects in helper methods. http://b/4191345
*/
public final class FinalizationTester {
private FinalizationTester() {}
public static void induceFinalization() {
// System.gc() does not garbage collect every time. Runtime.gc() is
// more likely to perfom a gc.
Runtime.getRuntime().gc();
enqueueReferences();
System.runFinalization();
}
public static void enqueueReferences() {
/*
* Hack. We don't have a programmatic way to wait for the reference queue
* daemon to move references to the appropriate queues.
*/
try {
Thread.sleep(100);
} catch (InterruptedException e) {
throw new AssertionError();
}
}
}