/*

 * 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.

 */

package nsk.jdwp.ObjectReference.GetValues;

import java.io.*;

import nsk.share.*;

import nsk.share.jpda.*;

import nsk.share.jdwp.*;

/**

 * Test for JDWP command: ObjectReference.GetValues.

 *

 * See getvalues001.README for description of test execution.

 *

 * Test is executed by invoking method runIt().

 * JDWP command is tested in method testCommand().

 *

 * @see #runIt()

 * @see #testCommand()

 */

public class getvalues001 {

    // exit status constants

    static final int JCK_STATUS_BASE = 95;

    static final int PASSED = 0;

    static final int FAILED = 2;

    // communication signals constants

    static final String READY = "ready";

    static final String QUIT = "quit";

    // package and classes names constants

    static final String PACKAGE_NAME = "nsk.jdwp.ObjectReference.GetValues";

    static final String TEST_CLASS_NAME = PACKAGE_NAME + "." + "getvalues001";

    static final String DEBUGEE_CLASS_NAME = TEST_CLASS_NAME + "a";

    // tested JDWP command constants

    static final String JDWP_COMMAND_NAME = "ObjectReference.GetValues";

    static final int JDWP_COMMAND_ID = JDWP.Command.ObjectReference.GetValues;

    // tested class name and signature constants

    static final String TESTED_CLASS_NAME = DEBUGEE_CLASS_NAME + "$" + "TestedClass";

    static final String TESTED_CLASS_SIGNATURE = "L" + TESTED_CLASS_NAME.replace('.', '/') + ";";

    // name of the static field in the tested class with the tested object value

    static final String OBJECT_FIELD_NAME = getvalues001a.OBJECT_FIELD_NAME;

    // names and expected values of the tested fields

    static final Object fields [][] = {

                    { "booleanValue", "boolean",  new Boolean(true),           "own"},

                    { "byteValue",    "byte",     new Byte((byte)0x0F),        "own"},

                    { "charValue",    "char",     new Character('Z'),          "own"},

                    { "intValue",     "int",      new Integer(100),            "own"},

                    { "shortValue",   "short",    new Short((short)10),        "own"},

                    { "longValue",    "long",     new Long((long)1000000),     "own"},

                    { "floatValue",   "float",    new Float((float)3.14),      "own"},

                    { "doubleValue",  "double",   new Double((double)2.8e-12), "own"},

                    { "objectValue",  "objectID", new Long((long)0),           "own"},

                };

    static final int FIELDS_COUNT = fields.length;

    // usual scaffold objects

    ArgumentHandler argumentHandler = null;

    Log log = null;

    Binder binder = null;

    Debugee debugee = null;

    Transport transport = null;

    IOPipe pipe = null;

    // test passed or not

    boolean success = true;

    // -------------------------------------------------------------------

    /**

     * Start test from command line.

     */

    public static void main (String argv[]) {

        System.exit(run(argv,System.out) + JCK_STATUS_BASE);

    }

    /**

     * Start JCK-compilant test.

     */

    public static int run(String argv[], PrintStream out) {

        return new getvalues001().runIt(argv, out);

    }

    // -------------------------------------------------------------------

    /**

     * Perform test execution.

     */

    public int runIt(String argv[], PrintStream out) {

        // make log for debugger messages

        argumentHandler = new ArgumentHandler(argv);

        log = new Log(out, argumentHandler);

        // execute test and display results

        try {

            log.display("\n>>> Preparing debugee for testing \n");

            // launch debugee

            binder = new Binder(argumentHandler, log);

            log.display("Launching debugee");

            debugee = binder.bindToDebugee(DEBUGEE_CLASS_NAME);

            transport = debugee.getTransport();

            pipe = debugee.createIOPipe();

            // make debuggee ready for testing

            prepareDebugee();

            // work with prepared debugee

            try {

                log.display("\n>>> Obtaining requred data from debugee \n");

                // query debugee for TypeID of tested class

                log.display("Getting ReferenceTypeID by signature:\n"

                            + "  " + TESTED_CLASS_SIGNATURE);

                long classID = debugee.getReferenceTypeID(TESTED_CLASS_SIGNATURE);

                log.display("  got classID: " + classID);

                // query debuggee for objectID value from static field

                log.display("Getting objectID value from static field: "

                            + OBJECT_FIELD_NAME);

                long objectID = queryObjectID(classID,

                            OBJECT_FIELD_NAME, JDWP.Tag.OBJECT);

                log.display("  got objectID: " + objectID);

                // query debugee for fieldIDs of tested class static fields

                log.display("Getting fieldIDs the tested class with the tested values");

                long fieldIDs[] = queryClassFieldIDs(classID);

                // perform testing JDWP command

                log.display("\n>>> Testing JDWP command \n");

                testCommand(objectID, fieldIDs);

            } finally {

                // quit debugee

                log.display("\n>>> Finishing test \n");

                quitDebugee();

            }

        } catch (Failure e) {

            log.complain("TEST FAILED: " + e.getMessage());

            e.printStackTrace(out);

            success = false;

        } catch (Exception e) {

            log.complain("Caught unexpected exception:\n" + e);

            e.printStackTrace(out);

            success = false;

        }

        if (!success) {

            log.complain("TEST FAILED");

            return FAILED;

        }

        out.println("TEST PASSED");

        return PASSED;

    }

    /**

     * Prepare debugee for testing and waiting for ready signal.

     */

    void prepareDebugee() {

        // wait for VM_INIT event from debugee

        log.display("Waiting for VM_INIT event");

        debugee.waitForVMInit();

        // query debugee for VM-dependent ID sizes

        log.display("Querying for IDSizes");

        debugee.queryForIDSizes();

        // resume initially suspended debugee

        log.display("Resuming debugee VM");

        debugee.resume();

        // wait for READY signal from debugee

        log.display("Waiting for signal from debugee: " + READY);

        String signal = pipe.readln();

        log.display("Received signal from debugee: " + signal);

        if (! signal.equals(READY)) {

            throw new TestBug("Unexpected signal received form debugee: " + signal

                            + " (expected: " + READY + ")");

        }

    }

    /**

     * Sending debugee signal to quit and waiting for it exits.

     */

    void quitDebugee() {

        // send debugee signal to quit

        log.display("Sending signal to debugee: " + QUIT);

        pipe.println(QUIT);

        // wait for debugee exits

        log.display("Waiting for debugee exits");

        int code = debugee.waitFor();

        // analize debugee exit status code

        if (code == JCK_STATUS_BASE + PASSED) {

            log.display("Debugee PASSED with exit code: " + code);

        } else {

            log.complain("Debugee FAILED with exit code: " + code);

            success = false;

        }

    }

    /**

     * Query debuggee for objectID value of static class field.

     */

    long queryObjectID(long classID, String fieldName, byte tag) {

        // get fieledID for static field (declared in the class)

        long fieldID = debugee.getClassFieldID(classID, fieldName, true);

        // get value of the field

        JDWP.Value value = debugee.getStaticFieldValue(classID, fieldID);

        // check that value has THREAD tag

        if (value.getTag() != tag) {

            throw new Failure("Wrong objectID tag received from field \"" + fieldName

                            + "\": " + value.getTag() + " (expected: " + tag + ")");

        }

        // extract threadID from the value

        long objectID = ((Long)value.getValue()).longValue();

        return objectID;

    }

    /**

     * Query debugee for fieldIDs and them into nested_classesIDs array.

     */

    long[] queryClassFieldIDs(long typeID) {

        // create array for expected filedIDs

        long fieldIDs[] = new long[FIELDS_COUNT];

        for (int i = 0; i < FIELDS_COUNT; i++) {

            fieldIDs[i] = 0;

        }

        // obtain requested fieldIDs form debuggee

        int count = 0;

        try {

            CommandPacket command = new CommandPacket(JDWP.Command.ReferenceType.Fields);

            command.addReferenceTypeID(typeID);

            command.setLength();

            ReplyPacket reply = debugee.receiveReplyFor(command);

            reply.resetPosition();

            long declared = reply.getInt();

            if (declared < FIELDS_COUNT) {

                throw new Failure("Too few fields of the tested class returned: " + declared

                                    + " (expected: at least " + FIELDS_COUNT + ")");

            }

            for (int i = 0; i < declared; i++ ) {

                long fieldID = reply.getFieldID();

                String name = reply.getString();

                String signature = reply.getString();

                int modBits = reply.getInt();

                for (int j = 0; j < FIELDS_COUNT; j++) {

                    if (fields[j][0].equals(name)) {

                        fieldIDs[j] = fieldID;

                        break;

                    }

                }

            }

            if (!reply.isParsed()) {

                throw new Failure("Extra trailing bytes found in the reply packet at: "

                                    + reply.currentPosition());

            }

        } catch (BoundException e) {

            throw new Failure("Unable to extract field IDs from the reply packet:\n"

                            + e.getMessage());

        }

        return fieldIDs;

    }

    /**

     * Extract and check i-th value from the reply packet.

     */

    void checkValue(int i, JDWP.Value value) {

        if (!fields[i][2].equals(value.getValue())) {

            log.complain("Unexpected value for " + i + " field received: " + value

                            + " (expected: " + fields[i][2] + ")");

            success = false;

        }

    }

    /**

     * Perform testing JDWP command for specified objectID.

     */

    void testCommand(long objectID, long fieldIDs[]) {

        int count = fieldIDs.length;

        // create command packet

        log.display("Create command packet:");

        log.display("Command: " + JDWP_COMMAND_NAME);

        CommandPacket command = new CommandPacket(JDWP_COMMAND_ID);

        // add out data to the command packet

        log.display("  objectID: " + objectID);

        command.addObjectID(objectID);

        log.display("  fields: " + count);

        command.addInt(count);

        for (int i = 0; i < count; i++) {

            log.display("  #" + i +": fieldID: " + fieldIDs[i]);

            command.addFieldID(fieldIDs[i]);

        }

        command.setLength();

        // send command packet to debugee

        try {

            log.display("Sending command packet:\n" + command);

            transport.write(command);

        } catch (IOException e) {

            log.complain("Unable to send command packet:\n" + e);

            success = false;

            return;

        }

        ReplyPacket reply = new ReplyPacket();

        // receive reply packet from debugee

        try {

            log.display("Waiting for reply packet");

            transport.read(reply);

            log.display("Reply packet received:\n" + reply);

        } catch (IOException e) {

            log.complain("Unable to read reply packet:\n" + e);

            success = false;

            return;

        }

        // check reply packet header

        try{

            log.display("Checking reply packet header");

            reply.checkHeader(command.getPacketID());

        } catch (BoundException e) {

            log.complain("Bad header of reply packet: " + e.getMessage());

            success = false;

        }

        // start parsing reply packet data

        log.display("Parsing reply packet:");

        reply.resetPosition();

        // extract and check number of values

        int values = 0;

        try {

            values = reply.getInt();

            log.display("  values: " + values);

        } catch (BoundException e) {

            log.complain("Unable to extract number of values form reply packet:\n" + e.getMessage());

            success = false;

        }

        // check if number of values are as expected

        if (values < 0) {

            log.complain("Negative number of values received:" + values

                        + " (expected: " + count + ")");

            success = false;

        } else if (values != count) {

            log.complain("Unexpected number of values received:" + values

                        + " (expected: " + count + ")");

            success = false;

        }

        // extract and check each value

        for (int i = 0; i < values; i++ ) {

            log.display("  value #" + i + " (field: " + fields[i][0] + ")");

            // extract value

            JDWP.Value value = null;

            try {

                value = reply.getValue();

                log.display("    value: " + value);

            } catch (BoundException e) {

                log.complain("Unable to extract " + i + " value:\n" + e.getMessage());

                success = false;

                break;

            }

            // extract and check value by known type tag

            checkValue(i, value);

        }

        // check for extra data in reply packet

        if (! reply.isParsed()) {

            log.complain("Extra trailing bytes found in reply packet at: "

                        + "0x" + reply.toHexString(reply.currentDataPosition(), 4));

            success = false;

        }

    }

}