/*
* Copyright (c) 2017, Google 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.
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*/
package MyPackage;
import java.util.List;
/**
* @test
* @summary Checks the Recent garbage storage system.
* @build Frame HeapMonitor
* @compile HeapMonitorRecentTest.java
* @run main/othervm/native -agentlib:HeapMonitor MyPackage.HeapMonitorRecentTest
*/
public class HeapMonitorRecentTest {
private native static boolean framesNotInLiveOrRecent(Frame[] frames);
private native static boolean framesExistInLiveAndRecent(Frame[] frames);
private static List runner(int max) {
List frameList = null;
for (int j = 0; j < max; j++) {
frameList = HeapMonitor.allocate();
}
frameList.add(new Frame("runner", "(I)Ljava/util/List;", "HeapMonitorRecentTest.java", 44));
return frameList;
}
public static void main(String[] args) {
HeapMonitor.enableSampling();
// We are testing for the recent garbage sampler:
// First run for 10000 iterations to fill up the garbage sampler.
List firstFrameList = runner(10);
firstFrameList.add(new Frame("main", "([Ljava/lang/String;)V", "HeapMonitorRecentTest.java", 54));
// Now because we are in a different stack frame line here, we can just re-use the same runner.
// Run for 3, we really should not see that many of these and most should be the first type.
List secondFrameList = runner(10);
secondFrameList.add(new Frame("main", "([Ljava/lang/String;)V", "HeapMonitorRecentTest.java", 59));
// We should no longer have the initial frames.
boolean status = framesNotInLiveOrRecent(firstFrameList.toArray(new Frame[0]));
if (!status) {
throw new RuntimeException("Initial frames still internally there.");
}
// We should see those new frames.
status = framesExistInLiveAndRecent(secondFrameList.toArray(new Frame[0]));
if (!status) {
throw new RuntimeException("Second frame list not found in both live and recent.");
}
}
}