test/hotspot/jtreg/vmTestbase/nsk/jvmti/IterateThroughHeap/filter_tagged/HeapFilter.java

/*
 * Copyright (c) 2013, 2018, 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.
 */
package nsk.jvmti.IterateThroughHeap.filter_tagged;

import java.util.Random;
import java.io.PrintStream;

import nsk.share.*;
import nsk.share.jvmti.*;

public class HeapFilter extends DebugeeClass {

    static {
        loadLibrary("HeapFilter");
    }

    public static void main(String args[]) {
        String[] argv = JVMTITest.commonInit(args);
        System.exit(new HeapFilter().runTest(argv,System.out) + Consts.JCK_STATUS_BASE);
    }

    protected Log log = null;
    protected ArgumentHandler argHandler = null;
    protected int status = Consts.TEST_PASSED;

    static protected Object testObjects[];

    public int runTest(String args[], PrintStream out) {
        argHandler = new ArgumentHandler(args);
        log = new Log(out, argHandler);
        testObjects = new Object[]{new TaggedClass(),
                                   new UntaggedClass()};
        log.enableVerbose(true);
        log.display("Verifying reachable objects.");
        status = checkStatus(status);
        testObjects = null;
        log.display("Verifying unreachable objects.");
        status = checkStatus(status);
        return status;
    }

}

class TaggedClass {
    static int field1 = 0xC0DE01;
    int field2 = 0xC0DE02;
    String stringField = "I'm a tagged string";
    int arrayField[] = new int[]{field1,field1+1};
}

class UntaggedClass {
    static int field1 = 0xC0DE03;
    int field2 = 0xC0DE04;
    String stringField = "I'm an untagged string";
    int arrayField[] = new int[]{field1,field1+1};
}