/*
 * 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.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 */

package MyPackage;

import java.util.List;

/**
 * @test
 * @summary Verifies the JVMTI Heap Monitor API
 * @build Frame HeapMonitor
 * @compile HeapMonitorTest.java
 * @run main/othervm/native -agentlib:HeapMonitor MyPackage.HeapMonitorTest
 */

public class HeapMonitorTest {

  private static native boolean framesAreNotLive(Frame[] frames);

  public static void main(String[] args) {
    HeapMonitor.enableSampling();
    List<Frame> frameList = HeapMonitor.allocate();
    frameList.add(new Frame("main", "([Ljava/lang/String;)V", "HeapMonitorTest.java", 42));

    Frame[] frames = frameList.toArray(new Frame[0]);
    boolean status = HeapMonitor.framesExistEverywhere(frames);
    if (!status) {
      throw new RuntimeException("Non-zero status returned from the agent: " + status);
    }

    // By freeing the storage and looking at live objects, the expected frames should no longer be
    // there since looking at live objects provokes a full GC.
    HeapMonitor.freeStorage();
    status = framesAreNotLive(frames);
  }
}