test/hotspot/jtreg/vmTestbase/nsk/jdwp/Event/FIELD_MODIFICATION/fldmodification001a.java

/*
 * Copyright (c) 2001, 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.
 */

//    THIS TEST IS LINE NUMBER SENSITIVE

package nsk.jdwp.Event.FIELD_MODIFICATION;

import nsk.share.*;
import nsk.share.jpda.*;
import nsk.share.jdwp.*;

import java.io.*;

/**
 * This class represents debuggee part in the test.
 */
public class fldmodification001a {

    static final int BREAKPOINT_LINE = 114;
    static final int FIELD_MODIFICATION_LINE = 126;

    static ArgumentHandler argumentHandler = null;
    static Log log = null;

    public static void main(String args[]) {
        fldmodification001a _fldmodification001a = new fldmodification001a();
        System.exit(fldmodification001.JCK_STATUS_BASE + _fldmodification001a.runIt(args, System.err));
    }

    public int runIt(String args[], PrintStream out) {
        //make log for debugee messages
        argumentHandler = new ArgumentHandler(args);
        log = new Log(out, argumentHandler);

        // create tested thread and object
        log.display("Creating object of the tested class");
        TestedObjectClass.object = new TestedObjectClass();
        log.display("  ... object created");

        log.display("Creating tested thread");
        TestedThreadClass thread = new TestedThreadClass(fldmodification001.TESTED_THREAD_NAME);
        log.display("  ... thread created");

        // start tested thread
        log.display("Starting tested thread");
        thread.start();
        log.display("  ... thread started");

        // wait for thread finished
        try {
            log.display("Waiting for tested thread finished");
            thread.join();
            log.display("  ... thread finished");
        } catch (InterruptedException e) {
            log.complain("Interruption while waiting for tested thread finished");
            return fldmodification001.FAILED;
        }

        // exit debugee
        log.display("Debugee PASSED");
        return fldmodification001.PASSED;
    }

    // tested thread class
    public static class TestedThreadClass extends Thread {

        public TestedThreadClass(String name) {
            super(name);
        }

        public void run() {
            log.display("Tested thread: started");

            // invoke method of tested object class
            TestedObjectClass.run();

            log.display("Tested thread: finished");
        }
    }

    // tested object class
    public static class TestedObjectClass {

        // static field with object been accessed
        public static volatile TestedObjectClass object = null;

        // static field been accessed
        public static int value = 0;

        // reach breakpoint and then touch field
        public static void run() {
            log.display("Breakpoint line reached");
            // next line is location of BREAKPOINT event
            int foo = 0; // BREAKPOINT_LINE
            log.display("Breakpoint line passed");

            // invoke method which accesses the field
            methodForAccess();
        }

        // access the tested field
        public static void methodForAccess() {
            log.display("Assigning to tested field new value: "
                        + fldmodification001.FIELD_MODIFICATION_VALUE);
            // next line is location of FIELD_MODIFICATION event
            value = fldmodification001.FIELD_MODIFICATION_VALUE; // FIELD_MODIFICATION_LINE
            log.display("Tested field modified");
        }
    }
}