/*

 * Copyright (c) 2005, 2006, 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.

 */

/**

 *  @test

 *  @bug 5024119

 *  @summary Add ReferenceType.getAllInstances () method to JDI.

 *  @author jjh

 *

 *  @run build TestScaffold VMConnection TargetListener TargetAdapter

 *  @run compile -g InstancesTest.java

 *  @run main InstancesTest

 */

/*

 *  To run this test do this:

 *     runregress -no InstancesTest <cmd line options>

 *

 *  where <cmd line options> are the options to be used to

 *  launch the debuggee, with the classname prefixed with @@.

 *  For example, this would run java2d demo as the debuggee:

 *     runregress -no InstancesTest -classpath

 *                                    $jdkDir/demo/jfc/Java2D/Java2Demo.jar \

 *                                    -client @@java2d.Java2Demo

 *

 * In this mode, the specified debuggee is launched in debug mode,

 * the debugger waits 20 secs, and then connects to the debuggee, suspends

 * it, and 'debugs' it.

 *

 * If <cmd line options> is not specified, then the InstancesTarg class below

 * is run as the debuggee.

 */

import com.sun.jdi.*;

import com.sun.jdi.event.*;

import com.sun.jdi.request.*;

import java.util.*;

class InstancesFiller {

    // This many instances of this are created.

    static int FILLER_COUNT = 200000;

    static InstancesFiller[] lotsAndLots = new InstancesFiller[

                                               InstancesFiller.FILLER_COUNT];

    int xx;

    InstancesFiller(int p1) {

        xx = p1;

    }

}

class InstancesTarg {

    // This many instances + 1 of this class are created.

    static int TARG_COUNT = 1000;

    static InstancesTarg theInstancesTarg;

    static InstancesTarg[] allInstancesTargs;

    // Each instance will point to the theInstancesTarg

    InstancesTarg oneInstancesTarg;

    public static void bkpt() {

    }

    public static void main(String[] args) {

        System.out.println("Howdy!");

        for (int ii = 0; ii < InstancesFiller.lotsAndLots.length; ii++) {

            InstancesFiller.lotsAndLots[ii] = new InstancesFiller(ii);

        }

        theInstancesTarg = new InstancesTarg();

        allInstancesTargs = new InstancesTarg[InstancesTarg.TARG_COUNT];

        for (int ii = 0; ii < InstancesTarg.TARG_COUNT; ii++) {

            allInstancesTargs[ii] = new InstancesTarg();

            allInstancesTargs[ii].oneInstancesTarg = theInstancesTarg;

        }

        bkpt();

        System.out.println("Goodbye from InstancesTarg!");

    }

}

/********** test program **********/

public class InstancesTest extends TestScaffold {

    static String targetName = "InstancesTarg";

    ReferenceType targetClass;

    ThreadReference mainThread;

    InstancesTest(String args[]) {

        super(args);

    }

    public static void main(String[] args) throws Exception {

        /*

         * If args contains @@xxxx, then that is the

         * name of the class we are to run.

         */

        for (int ii = 0; ii < args.length; ii ++) {

            if (args[ii].startsWith("@@")) {

                targetName = args[ii] = args[ii].substring(2);

                break;

            }

        }

        new InstancesTest(args).startTests();

    }

    /*

     * Used to sort a list of ReferenceTypes by

     * instance count.

     */

    class ToSort implements Comparable<ToSort> {

        long count;

        ReferenceType rt;

        public ToSort(long count, ReferenceType rt) {

            this.count = count;

            this.rt = rt;

        }

        public int compareTo(ToSort obj) {

            if (count < obj.count) return -1;

            if (count == obj.count) return 0;

            return 1;

        }

    }

    protected void runTests() throws Exception {

        /*

         * Get to the top of main()

         * to determine targetClass and mainThread

         */

        int CUT_OFF = 1000;

        BreakpointEvent bpe;

        bpe = startToMain(targetName);

        targetClass = bpe.location().declaringType();

        mainThread = bpe.thread();

        if (targetName.equals("InstancesTarg")) {

            resumeTo("InstancesTarg", "bkpt", "()V");

        } else {

            // Let debuggee run for awhile to get classes loaded

            vm().resume();

            try {

                System.err.println("Press <enter> to continue");

                System.in.read();

                System.err.println("running...");

            } catch(Exception e) {

            }

            vm().suspend();

        }

        // Get all classes.

        long start = System.currentTimeMillis();

        List<ReferenceType> allClasses = vm().allClasses();

        long end = System.currentTimeMillis();

        System.out.println( allClasses.size() +

                            " classes from vm.allClasses() took " +

                            (end - start) + " ms");

        long[] counts;

        // Test for NPE

        {

            boolean pass = false;

            try {

                counts = vm().instanceCounts(null);

            } catch (NullPointerException ee) {

                pass = true;

            }

            if (!pass) {

                failure("failure: NullPointerException not thrown on instanceCounts(null)");

            }

        }

        // Test for 0 length array

        {

            List<ReferenceType>someClasses = new ArrayList(2);

            counts = vm().instanceCounts(someClasses);

            if (counts.length != 0) {

                failure("failure: instanceCounts with a zero length array fails: " +

                        counts.length);

            }

        }

        // Test various values of maxInstances

        if (targetClass.name().equals("InstancesTarg")) {

            List<ObjectReference> noInstances = targetClass.instances(0);

            if (noInstances.size() != InstancesTarg.TARG_COUNT + 1) {

                failure("failure: instances(0): " + noInstances.size() + ", for " + targetClass);

            }

            noInstances = targetClass.instances(1);

            if (noInstances.size() != 1) {

                failure("failure: instances(1): " + noInstances.size() + ", for " + targetClass);

            }

            boolean pass = false;

            try {

                noInstances = targetClass.instances(-1);

            } catch (IllegalArgumentException ee) {

                pass = true;

            }

            if (!pass) {

                failure("failure: instances(-1) did not get an exception");

            }

        }

        // Instance counts for all classes

        start = System.currentTimeMillis();

        counts = vm().instanceCounts(allClasses);

        end = System.currentTimeMillis();

        if (counts.length == 0) {

            System.out.println("failure: No instances found");

            throw new Exception("InstancesTest: failed");

        }

        // Create a list of ReferenceTypes sorted by instance count

        int size = 0;

        List<ToSort> sorted = new ArrayList(allClasses.size());

        for (int ii = 0; ii < allClasses.size(); ii++) {

            System.out.println(counts[ii] + "   " + allClasses.get(ii));

            size += counts[ii];

            ToSort tos = new ToSort(counts[ii], allClasses.get(ii));

            sorted.add(tos);

        }

        System.out.println("instance counts for " + counts.length +

                           " classes got " + size + " instances and took " +

                            (end - start) + " ms");

        boolean gotInstancesFiller = false;

        boolean gotInstancesTarg = false;

        Collections.sort(sorted);

        for (int ii = sorted.size() - 1; ii >= 0 ; ii--) {

            ToSort xxx = sorted.get(ii);

            if (xxx.count <= CUT_OFF) {

                break;

            }

            if (xxx.rt.name().equals("InstancesFiller") &&

                xxx.count == InstancesFiller.FILLER_COUNT) {

                gotInstancesFiller = true;

            }

            if (xxx.rt.name().equals("InstancesTarg") &&

                xxx.count == InstancesTarg.TARG_COUNT + 1) {

                gotInstancesTarg = true;

            }

        }

        if (!gotInstancesFiller) {

                failure("failure: Expected " + InstancesFiller.FILLER_COUNT +

                        " instances of InstancesFiller");

        }

        if (!gotInstancesTarg) {

            failure("failure: Expected " + (InstancesTarg.TARG_COUNT + 1) +

                    " instances of InstancesTarg");

        }

        // Instances, one class at a time, in sorted order, printing each line

        if (true) {

            System.out.println("\nGetting instances for one class " +

                               "at a time (limited) in sorted order");

            List<ReferenceType> rtList = new ArrayList(1);

            rtList.add(null);

            long start1 = System.currentTimeMillis();

            size = 0;

            long count = 0;

            for (int ii = sorted.size() - 1; ii >= 0 ; ii--) {

                ToSort xxx = sorted.get(ii);

                if (xxx.count <= CUT_OFF) {

                    break;

                }

                rtList.set(0, xxx.rt);

                start = System.currentTimeMillis();

                List<ObjectReference> oneInstances = xxx.rt.instances(19999999);

                end = System.currentTimeMillis();

                size += oneInstances.size();

                count++;

                System.out.println("Expected " + xxx.count + " instances, got " +

                                   oneInstances.size() +

                                   " instances for " + sorted.get(ii).rt +

                                   " in " + (end - start) + " ms");

                if (xxx.rt.name().equals("InstancesFiller") &&

                    oneInstances.size() != InstancesFiller.FILLER_COUNT) {

                    failure("failure: Expected " + InstancesFiller.FILLER_COUNT +

                            " instances of InstancesFiller");

                }

                if (xxx.rt.name().equals("InstancesTarg") &&

                    oneInstances.size() != InstancesTarg.TARG_COUNT + 1) {

                    failure("failure: Expected " + (InstancesTarg.TARG_COUNT + 1) +

                            " instances of InstancesTarg");

                }

            }

            end = System.currentTimeMillis();

            System.out.println(size + " instances via making one vm.instances" +

                               " call for each of " + count +

                               " classes took " + (end - start1) + " ms");

            System.out.println("Per class = " +

                               (end - start) / allClasses.size() + " ms");

        }

        /*

         * deal with results of test

         * if anything has called failure("foo") testFailed will be true

         */

        if (!testFailed) {

            println("InstancesTest: passed");

        } else {

            throw new Exception("InstancesTest: failed");

        }

    }

}