test/hotspot/jtreg/vmTestbase/nsk/jdwp/VirtualMachine/RedefineClasses/redefinecls001.java - platform/libcore - Git at Google

 /*
  * 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.VirtualMachine.RedefineClasses;

 import java.io.*;

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

 /**
  * Test for JDWP command: VirtualMachine.RedefineClasses.
  *
  * See redefinecls001.README for description of test execution.
  *
  * This class represents debugger part of the test.
  * Test is executed by invoking method runIt().
  * JDWP command is tested in the method testCommand().
  *
  * @see #runIt()
  * @see #testCommand()
  */
 public class redefinecls001 {

     // exit status constants
     static final int JCK_STATUS_BASE = 95;
     static final int PASSED = 0;
     static final int FAILED = 2;

     // VM capability constatnts
     static final int VM_CAPABILITY_NUMBER = JDWP.Capability.CAN_REDEFINE_CLASSES;
     static final String VM_CAPABILITY_NAME = "canRedefineClasses";

     // package and classes names
     static final String PACKAGE_NAME = "nsk.jdwp.VirtualMachine.RedefineClasses";
     static final String TEST_CLASS_NAME = PACKAGE_NAME + "." + "redefinecls001";
     static final String DEBUGEE_CLASS_NAME = TEST_CLASS_NAME + "a";

     // tested JDWP command
     static final String JDWP_COMMAND_NAME = "VirtualMachine.RedefineClasses";
     static final int JDWP_COMMAND_ID = JDWP.Command.VirtualMachine.RedefineClasses;

     // tested class name and signature
     static final String TESTED_CLASS_NAME = TEST_CLASS_NAME + "b";
     static final String TESTED_CLASS_SIGNATURE = "L" + TESTED_CLASS_NAME.replace('.', '/') + ";";

     // field and method names
     static final String CONSTRUCTOR_FIELD_NAME = "constructorInvoked";
     static final String STATIC_METHOD_FIELD_NAME = "staticMethodInvoked";
     static final String OBJECT_METHOD_FIELD_NAME = "objectMethodInvoked";
     static final String BREAKPOINT_METHOD_NAME = "runIt";
     static final int BREAKPOINT_LINE_BEFORE = redefinecls001a.BREAKPOINT_LINE_BEFORE;
     static final int BREAKPOINT_LINE_AFTER = redefinecls001a.BREAKPOINT_LINE_AFTER;

     // filename for redefined class
 //   4691123 TEST: some jdi tests contain precompiled .klass files undes SCCS
 //   precomiled class was removed
 //    static final String REDEFINED_CLASS_FILE_NAME = "redefinecls001b.klass";
     static final String REDEFINED_CLASS_FILE_NAME = "newclass"
                     + File.separator + PACKAGE_NAME.replace('.',File.separatorChar)
                     + File.separator + "redefinecls001b.class";
 //    static final String REDEFINED_CLASS_DIR = ".";

     // usual scaffold objects
     ArgumentHandler argumentHandler = null;
     Log log = null;
     Binder binder = null;
     Debugee debugee = null;
     Transport transport = null;
     int waitTime = 0;  // minutes
     long timeout = 0;  // milliseconds
     String testDir = null;
     boolean dead = false;
     boolean success = true;

     // data obtained from debuggee
     long debugeeClassID = 0;
     long testedClassID = 0;
     long breakpointMethodID = 0;
     ByteBuffer redefinedClassBytes = null;

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

     /**
      * 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 redefinecls001().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);
         waitTime = argumentHandler.getWaitTime();  // minutes
         timeout = waitTime * 60 * 1000;           // milliseconds

         // get testDir as first positional parameter
         String args[] = argumentHandler.getArguments();
         if (args.length < 1) {
             log.complain("Test dir required as the first positional argument");
             return FAILED;
         }
         testDir = args[0];

         // execute test and display results
         try {
             log.display("\n>>> Loading redefined class \n");

             // load class file for redefined class
             log.display("Loading bytecode of redefined class from file: " +
                         REDEFINED_CLASS_FILE_NAME);
             redefinedClassBytes = loadClassBytes(REDEFINED_CLASS_FILE_NAME, testDir);
             log.display("   ... loaded bytes: " + redefinedClassBytes.length());

             log.display("\n>>> Starting debugee \n");

             // launch debuggee
             binder = new Binder(argumentHandler, log);
             log.display("Launching debugee VM");
             debugee = binder.bindToDebugee(DEBUGEE_CLASS_NAME);
             transport = debugee.getTransport();
             log.display("  ... debuggee launched");

             // set timeout for debuggee responces
             log.display("Setting timeout for debuggee responces: " + waitTime + " minute(s)");
             transport.setReadTimeout(timeout);
             log.display("  ... timeout set");

             // wait for VM_INIT event
             log.display("Waiting for VM_INIT event");
             debugee.waitForVMInit();
             log.display("  ... VM_INIT event received");

             // query debugee for VM-dependent ID sizes
             log.display("Querying for IDSizes");
             debugee.queryForIDSizes();
             log.display("  ... size of VM-dependent types adjusted");

             // check for VM capability
             log.display("\n>>> Checking VM capability \n");
             log.display("Getting new VM capability: " + VM_CAPABILITY_NAME);
             boolean capable = debugee.getNewCapability(VM_CAPABILITY_NUMBER, VM_CAPABILITY_NAME);
             log.display("  ... got VM capability: " + capable);

             // exit as PASSED if this capability is not supported
             if (!capable) {
                 out.println("TEST PASSED: unsupported VM capability: "
                             + VM_CAPABILITY_NAME);
                 return PASSED;
             }

             // prepare debuggee for testing and obtain required data
             log.display("\n>>> Getting prepared for testing \n");
             prepareForTest();

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

             // check command results
             if (success) {
                 log.display("\n>>> Checking result of tested command \n");
                 checkResult();
             }

             // finish debuggee
             log.display("\n>> Finishing debuggee \n");

             // resume debuggee after testing command
             log.display("Resuming debuggee");
             debugee.resume();
             log.display("  ... debuggee resumed");

             // wait for VM_DEATH event
             log.display("Waiting for VM_DEATH event");
             debugee.waitForVMDeath();
             log.display("  ... VM_DEATH event received");
             dead = true;

         } catch (Failure e) {
             log.complain("TEST FAILED: " + e.getMessage());
             success = false;
         } catch (Exception e) {
             e.printStackTrace(out);
             log.complain("Caught unexpected exception while running the test:\n\t" + e);
             success = false;
         } finally {
             log.display("\n>>> Finishing test \n");

             // disconnect debugee and wait for its exit
             if (debugee != null) {
                 quitDebugee();
             }
         }

         // check result
         if (!success) {
             log.complain("TEST FAILED");
             return FAILED;
         }
         out.println("TEST PASSED");
         return PASSED;
     }

     /**
      * Get debuggee prepared for testing and obtain required data.
      */
     void prepareForTest() {
         // wait for debuggee and tested classes loaded on debuggee startup
         log.display("Waiting for classes loaded:"
                         + "\n\t" + DEBUGEE_CLASS_NAME
                         + "\n\t" + TESTED_CLASS_NAME);
         String classNames[] = {DEBUGEE_CLASS_NAME, TESTED_CLASS_NAME};
         long classIDs[] = debugee.waitForClassesLoaded(classNames,
                                                     JDWP.SuspendPolicy.ALL);
         debugeeClassID = classIDs[0];
         log.display("  ... debuggee class loaded with classID: " + debugeeClassID);
         testedClassID = classIDs[1];
         log.display("  ... tested class loaded with classID: " + testedClassID);
         log.display("");

         // set breakpoint before redefinition and wait for debugee reached it
         log.display("Waiting for breakpoint before redefiniton reached at: "
                     + BREAKPOINT_METHOD_NAME + ":" +  BREAKPOINT_LINE_BEFORE);
         long threadID = debugee.waitForBreakpointReached(debugeeClassID,
                                                 BREAKPOINT_METHOD_NAME,
                                                 BREAKPOINT_LINE_BEFORE,
                                                 JDWP.SuspendPolicy.ALL);
         log.display("  ... breakpoint before redefinition reached with threadID: " + threadID);
         log.display("");
     }

     /**
      * Perform testing JDWP command.
      */
     void testCommand() {
         int length = redefinedClassBytes.length();
         // create command packet and fill requred out data
         log.display("Create command packet:");
         log.display("Command: " + JDWP_COMMAND_NAME);
         CommandPacket command = new CommandPacket(JDWP_COMMAND_ID);
         log.display("  classes: " + 1);
         command.addInt(1);
         log.display("  refTypeID: " + testedClassID);
         command.addReferenceTypeID(testedClassID);
         log.display("  classfile: " + length + " bytes");
         command.addInt(length);
         log.display("  classbytes:\n" + redefinedClassBytes);
         command.addBytes(redefinedClassBytes.getBytes(), 0, length);
         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\t" + e);
             success = false;
             return;
         }

         // receive reply packet from debugee
         ReplyPacket reply = new ReplyPacket();
         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 for tested command:\n\t" + e);
             success = false;
             return;
         }

         // check reply packet header
         try{
             log.display("Checking header of reply packet");
             reply.checkHeader(command.getPacketID());
             log.display("  ... packet header is correct");
         } catch (BoundException e) {
             log.complain("Wrong header of reply packet for tested command:\n\t"
                         + e.getMessage());
             success = false;
             return;
         }

         // start parsing reply packet data
         log.display("Parsing reply packet data:");
         reply.resetPosition();

         // no reply data to parse
         log.display("  no reply data");

         // check for extra data in reply packet
         if (!reply.isParsed()) {
             log.complain("Extra trailing bytes found in reply packet at: "
                         + reply.offsetString());
             success = false;
         }

         log.display("  ... packed data parsed");
     }

     /**
      * Check result of the tested JDWP command.
      */
     void checkResult() {
         // set breakpoint after redefinition and wait for debugee reached it
         log.display("Waiting for breakpoint after redefiniton reached at: "
                     + BREAKPOINT_METHOD_NAME + ":" +  BREAKPOINT_LINE_AFTER);
         long threadID = debugee.waitForBreakpointReached(debugeeClassID,
                                                 BREAKPOINT_METHOD_NAME,
                                                 BREAKPOINT_LINE_AFTER,
                                                 JDWP.SuspendPolicy.ALL);
         log.display("  ... breakpoint after redefinition reached with threadID: " + threadID);
         log.display("");

         // check invoked methods
         log.display("Getting value of static field: " + CONSTRUCTOR_FIELD_NAME);
         JDWP.Value value = debugee.getStaticFieldValue(testedClassID,
                                                 CONSTRUCTOR_FIELD_NAME, JDWP.Tag.INT);
         int constructorInvoked = ((Integer)value.getValue()).intValue();
         log.display("  ... got constructorInvoked:  " + methodKind(constructorInvoked));

         if (constructorInvoked != redefinecls001b.NOT_REDEFINED_METHOD_INVOKED) {
             log.complain("Constructor has been invoked after class redefinition");
             success = false;
         }

         log.display("Getting value of static field: " + STATIC_METHOD_FIELD_NAME);
         value = debugee.getStaticFieldValue(testedClassID,
                                                 STATIC_METHOD_FIELD_NAME, JDWP.Tag.INT);
         int staticMethodInvoked = ((Integer)value.getValue()).intValue();
         log.display("  ... got staticMethodInvoked: " + methodKind(staticMethodInvoked));

         if (staticMethodInvoked != redefinecls001b.REDEFINED_METHOD_INVOKED) {
             log.complain("Not redefined static method is invoked after class redefinition");
             success = false;
         }

         log.display("Getting value of static field: " + OBJECT_METHOD_FIELD_NAME);
         value = debugee.getStaticFieldValue(testedClassID,
                                                 OBJECT_METHOD_FIELD_NAME, JDWP.Tag.INT);
         int objectMethodInvoked = ((Integer)value.getValue()).intValue();
         log.display("  ... got objectMethodInvoked: " + methodKind(objectMethodInvoked));

         if (objectMethodInvoked != redefinecls001b.REDEFINED_METHOD_INVOKED) {
             log.complain("Not redefined object method is invoked after class redefinition");
             success = false;
         }
     }

     /**
      * Load class bytes form the given file.
      */
     ByteBuffer loadClassBytes(String fileName, String dirName) {
         String fileSep = System.getProperty("file.separator");
         String filePath = dirName + fileSep + fileName;

         String error = "Unable to read bytes from class file:\n\t" + filePath;

         int length = 0;
         byte bytes[] = null;
         try {
             File file = new File(filePath);
             length = (int)file.length();
             FileInputStream is = new FileInputStream(file);
             bytes = new byte[length];
             int number = is.read(bytes);
             if (number < 0) {
                 log.complain("EOF reached while reading bytes from file");
                 throw new Failure(error);
             } else if (number != length) {
                 log.complain("Unexpected number of bytes red from file: " + number
                             + " (expected: " + length + ")");
                 throw new Failure(error);
             }
             is.close();
         } catch ( IOException e ) {
             log.complain("Caught IOException while reading bytes from file:\n\t" + e);
             throw new Failure(error);
         }
         ByteBuffer byteBuffer = new ByteBuffer(length, 0);
         byteBuffer.addBytes(bytes, 0, length);
         return byteBuffer;
     }

     /**
      * Disconnect debuggee and wait for it exited.
      */
     void quitDebugee() {
         if (debugee == null)
             return;

         // disconnect debugee
         if (!dead) {
             try {
                 log.display("Disconnecting debuggee");
                 debugee.dispose();
                 log.display("  ... debuggee disconnected");
             } catch (Failure e) {
                 log.display("Failed to finally disconnect debuggee:\n\t"
                             + e.getMessage());
             }
         }

         // wait for debugee exited
         log.display("Waiting for debuggee exit");
         int code = debugee.waitFor();
         log.display("  ... debuggee exited with exit code: " + code);

         // analize debugee exit status code
         if (code != JCK_STATUS_BASE + PASSED) {
             log.complain("Debuggee FAILED with exit code: " + code);
             success = false;
         }
     }

     // return string representation of kind of invoked method
     private static String methodKind(int kind) {
         switch (kind) {
             case redefinecls001b.METHOD_NOT_INVOKED:
                 return "METHOD_NOT_INVOKED";
             case redefinecls001b.REDEFINED_METHOD_INVOKED:
                 return "REDEFINED_METHOD_INVOKED";
             case redefinecls001b.NOT_REDEFINED_METHOD_INVOKED:
                 return "NOT_REDEFINED_METHOD_INVOKED";
             default:
                 return "UNKNOWN_METHOD_KIND";
         }
     }
 }
	/*
	* 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.VirtualMachine.RedefineClasses;

	import java.io.*;

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

	/**
	* Test for JDWP command: VirtualMachine.RedefineClasses.
	*
	* See redefinecls001.README for description of test execution.
	*
	* This class represents debugger part of the test.
	* Test is executed by invoking method runIt().
	* JDWP command is tested in the method testCommand().
	*
	* @see #runIt()
	* @see #testCommand()
	*/
	public class redefinecls001 {

	// exit status constants
	static final int JCK_STATUS_BASE = 95;
	static final int PASSED = 0;
	static final int FAILED = 2;

	// VM capability constatnts
	static final int VM_CAPABILITY_NUMBER = JDWP.Capability.CAN_REDEFINE_CLASSES;
	static final String VM_CAPABILITY_NAME = "canRedefineClasses";

	// package and classes names
	static final String PACKAGE_NAME = "nsk.jdwp.VirtualMachine.RedefineClasses";
	static final String TEST_CLASS_NAME = PACKAGE_NAME + "." + "redefinecls001";
	static final String DEBUGEE_CLASS_NAME = TEST_CLASS_NAME + "a";

	// tested JDWP command
	static final String JDWP_COMMAND_NAME = "VirtualMachine.RedefineClasses";
	static final int JDWP_COMMAND_ID = JDWP.Command.VirtualMachine.RedefineClasses;

	// tested class name and signature
	static final String TESTED_CLASS_NAME = TEST_CLASS_NAME + "b";
	static final String TESTED_CLASS_SIGNATURE = "L" + TESTED_CLASS_NAME.replace('.', '/') + ";";

	// field and method names
	static final String CONSTRUCTOR_FIELD_NAME = "constructorInvoked";
	static final String STATIC_METHOD_FIELD_NAME = "staticMethodInvoked";
	static final String OBJECT_METHOD_FIELD_NAME = "objectMethodInvoked";
	static final String BREAKPOINT_METHOD_NAME = "runIt";
	static final int BREAKPOINT_LINE_BEFORE = redefinecls001a.BREAKPOINT_LINE_BEFORE;
	static final int BREAKPOINT_LINE_AFTER = redefinecls001a.BREAKPOINT_LINE_AFTER;

	// filename for redefined class
	// 4691123 TEST: some jdi tests contain precompiled .klass files undes SCCS
	// precomiled class was removed
	// static final String REDEFINED_CLASS_FILE_NAME = "redefinecls001b.klass";
	static final String REDEFINED_CLASS_FILE_NAME = "newclass"
	+ File.separator + PACKAGE_NAME.replace('.',File.separatorChar)
	+ File.separator + "redefinecls001b.class";
	// static final String REDEFINED_CLASS_DIR = ".";

	// usual scaffold objects
	ArgumentHandler argumentHandler = null;
	Log log = null;
	Binder binder = null;
	Debugee debugee = null;
	Transport transport = null;
	int waitTime = 0; // minutes
	long timeout = 0; // milliseconds
	String testDir = null;
	boolean dead = false;
	boolean success = true;

	// data obtained from debuggee
	long debugeeClassID = 0;
	long testedClassID = 0;
	long breakpointMethodID = 0;
	ByteBuffer redefinedClassBytes = null;

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

	/**
	* 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 redefinecls001().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);
	waitTime = argumentHandler.getWaitTime(); // minutes
	timeout = waitTime * 60 * 1000; // milliseconds

	// get testDir as first positional parameter
	String args[] = argumentHandler.getArguments();
	if (args.length < 1) {
	log.complain("Test dir required as the first positional argument");
	return FAILED;
	}
	testDir = args[0];

	// execute test and display results
	try {
	log.display("\n>>> Loading redefined class \n");

	// load class file for redefined class
	log.display("Loading bytecode of redefined class from file: " +
	REDEFINED_CLASS_FILE_NAME);
	redefinedClassBytes = loadClassBytes(REDEFINED_CLASS_FILE_NAME, testDir);
	log.display(" ... loaded bytes: " + redefinedClassBytes.length());

	log.display("\n>>> Starting debugee \n");

	// launch debuggee
	binder = new Binder(argumentHandler, log);
	log.display("Launching debugee VM");
	debugee = binder.bindToDebugee(DEBUGEE_CLASS_NAME);
	transport = debugee.getTransport();
	log.display(" ... debuggee launched");

	// set timeout for debuggee responces
	log.display("Setting timeout for debuggee responces: " + waitTime + " minute(s)");
	transport.setReadTimeout(timeout);
	log.display(" ... timeout set");

	// wait for VM_INIT event
	log.display("Waiting for VM_INIT event");
	debugee.waitForVMInit();
	log.display(" ... VM_INIT event received");

	// query debugee for VM-dependent ID sizes
	log.display("Querying for IDSizes");
	debugee.queryForIDSizes();
	log.display(" ... size of VM-dependent types adjusted");

	// check for VM capability
	log.display("\n>>> Checking VM capability \n");
	log.display("Getting new VM capability: " + VM_CAPABILITY_NAME);
	boolean capable = debugee.getNewCapability(VM_CAPABILITY_NUMBER, VM_CAPABILITY_NAME);
	log.display(" ... got VM capability: " + capable);

	// exit as PASSED if this capability is not supported
	if (!capable) {
	out.println("TEST PASSED: unsupported VM capability: "
	+ VM_CAPABILITY_NAME);
	return PASSED;
	}

	// prepare debuggee for testing and obtain required data
	log.display("\n>>> Getting prepared for testing \n");
	prepareForTest();

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

	// check command results
	if (success) {
	log.display("\n>>> Checking result of tested command \n");
	checkResult();
	}

	// finish debuggee
	log.display("\n>> Finishing debuggee \n");

	// resume debuggee after testing command
	log.display("Resuming debuggee");
	debugee.resume();
	log.display(" ... debuggee resumed");

	// wait for VM_DEATH event
	log.display("Waiting for VM_DEATH event");
	debugee.waitForVMDeath();
	log.display(" ... VM_DEATH event received");
	dead = true;

	} catch (Failure e) {
	log.complain("TEST FAILED: " + e.getMessage());
	success = false;
	} catch (Exception e) {
	e.printStackTrace(out);
	log.complain("Caught unexpected exception while running the test:\n\t" + e);
	success = false;
	} finally {
	log.display("\n>>> Finishing test \n");

	// disconnect debugee and wait for its exit
	if (debugee != null) {
	quitDebugee();
	}
	}

	// check result
	if (!success) {
	log.complain("TEST FAILED");
	return FAILED;
	}
	out.println("TEST PASSED");
	return PASSED;
	}

	/**
	* Get debuggee prepared for testing and obtain required data.
	*/
	void prepareForTest() {
	// wait for debuggee and tested classes loaded on debuggee startup
	log.display("Waiting for classes loaded:"
	+ "\n\t" + DEBUGEE_CLASS_NAME
	+ "\n\t" + TESTED_CLASS_NAME);
	String classNames[] = {DEBUGEE_CLASS_NAME, TESTED_CLASS_NAME};
	long classIDs[] = debugee.waitForClassesLoaded(classNames,
	JDWP.SuspendPolicy.ALL);
	debugeeClassID = classIDs[0];
	log.display(" ... debuggee class loaded with classID: " + debugeeClassID);
	testedClassID = classIDs[1];
	log.display(" ... tested class loaded with classID: " + testedClassID);
	log.display("");

	// set breakpoint before redefinition and wait for debugee reached it
	log.display("Waiting for breakpoint before redefiniton reached at: "
	+ BREAKPOINT_METHOD_NAME + ":" + BREAKPOINT_LINE_BEFORE);
	long threadID = debugee.waitForBreakpointReached(debugeeClassID,
	BREAKPOINT_METHOD_NAME,
	BREAKPOINT_LINE_BEFORE,
	JDWP.SuspendPolicy.ALL);
	log.display(" ... breakpoint before redefinition reached with threadID: " + threadID);
	log.display("");
	}

	/**
	* Perform testing JDWP command.
	*/
	void testCommand() {
	int length = redefinedClassBytes.length();
	// create command packet and fill requred out data
	log.display("Create command packet:");
	log.display("Command: " + JDWP_COMMAND_NAME);
	CommandPacket command = new CommandPacket(JDWP_COMMAND_ID);
	log.display(" classes: " + 1);
	command.addInt(1);
	log.display(" refTypeID: " + testedClassID);
	command.addReferenceTypeID(testedClassID);
	log.display(" classfile: " + length + " bytes");
	command.addInt(length);
	log.display(" classbytes:\n" + redefinedClassBytes);
	command.addBytes(redefinedClassBytes.getBytes(), 0, length);
	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\t" + e);
	success = false;
	return;
	}

	// receive reply packet from debugee
	ReplyPacket reply = new ReplyPacket();
	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 for tested command:\n\t" + e);
	success = false;
	return;
	}

	// check reply packet header
	try{
	log.display("Checking header of reply packet");
	reply.checkHeader(command.getPacketID());
	log.display(" ... packet header is correct");
	} catch (BoundException e) {
	log.complain("Wrong header of reply packet for tested command:\n\t"
	+ e.getMessage());
	success = false;
	return;
	}

	// start parsing reply packet data
	log.display("Parsing reply packet data:");
	reply.resetPosition();

	// no reply data to parse
	log.display(" no reply data");

	// check for extra data in reply packet
	if (!reply.isParsed()) {
	log.complain("Extra trailing bytes found in reply packet at: "
	+ reply.offsetString());
	success = false;
	}

	log.display(" ... packed data parsed");
	}

	/**
	* Check result of the tested JDWP command.
	*/
	void checkResult() {
	// set breakpoint after redefinition and wait for debugee reached it
	log.display("Waiting for breakpoint after redefiniton reached at: "
	+ BREAKPOINT_METHOD_NAME + ":" + BREAKPOINT_LINE_AFTER);
	long threadID = debugee.waitForBreakpointReached(debugeeClassID,
	BREAKPOINT_METHOD_NAME,
	BREAKPOINT_LINE_AFTER,
	JDWP.SuspendPolicy.ALL);
	log.display(" ... breakpoint after redefinition reached with threadID: " + threadID);
	log.display("");

	// check invoked methods
	log.display("Getting value of static field: " + CONSTRUCTOR_FIELD_NAME);
	JDWP.Value value = debugee.getStaticFieldValue(testedClassID,
	CONSTRUCTOR_FIELD_NAME, JDWP.Tag.INT);
	int constructorInvoked = ((Integer)value.getValue()).intValue();
	log.display(" ... got constructorInvoked: " + methodKind(constructorInvoked));

	if (constructorInvoked != redefinecls001b.NOT_REDEFINED_METHOD_INVOKED) {
	log.complain("Constructor has been invoked after class redefinition");
	success = false;
	}

	log.display("Getting value of static field: " + STATIC_METHOD_FIELD_NAME);
	value = debugee.getStaticFieldValue(testedClassID,
	STATIC_METHOD_FIELD_NAME, JDWP.Tag.INT);
	int staticMethodInvoked = ((Integer)value.getValue()).intValue();
	log.display(" ... got staticMethodInvoked: " + methodKind(staticMethodInvoked));

	if (staticMethodInvoked != redefinecls001b.REDEFINED_METHOD_INVOKED) {
	log.complain("Not redefined static method is invoked after class redefinition");
	success = false;
	}

	log.display("Getting value of static field: " + OBJECT_METHOD_FIELD_NAME);
	value = debugee.getStaticFieldValue(testedClassID,
	OBJECT_METHOD_FIELD_NAME, JDWP.Tag.INT);
	int objectMethodInvoked = ((Integer)value.getValue()).intValue();
	log.display(" ... got objectMethodInvoked: " + methodKind(objectMethodInvoked));

	if (objectMethodInvoked != redefinecls001b.REDEFINED_METHOD_INVOKED) {
	log.complain("Not redefined object method is invoked after class redefinition");
	success = false;
	}
	}

	/**
	* Load class bytes form the given file.
	*/
	ByteBuffer loadClassBytes(String fileName, String dirName) {
	String fileSep = System.getProperty("file.separator");
	String filePath = dirName + fileSep + fileName;

	String error = "Unable to read bytes from class file:\n\t" + filePath;

	int length = 0;
	byte bytes[] = null;
	try {
	File file = new File(filePath);
	length = (int)file.length();
	FileInputStream is = new FileInputStream(file);
	bytes = new byte[length];
	int number = is.read(bytes);
	if (number < 0) {
	log.complain("EOF reached while reading bytes from file");
	throw new Failure(error);
	} else if (number != length) {
	log.complain("Unexpected number of bytes red from file: " + number
	+ " (expected: " + length + ")");
	throw new Failure(error);
	}
	is.close();
	} catch ( IOException e ) {
	log.complain("Caught IOException while reading bytes from file:\n\t" + e);
	throw new Failure(error);
	}
	ByteBuffer byteBuffer = new ByteBuffer(length, 0);
	byteBuffer.addBytes(bytes, 0, length);
	return byteBuffer;
	}

	/**
	* Disconnect debuggee and wait for it exited.
	*/
	void quitDebugee() {
	if (debugee == null)
	return;

	// disconnect debugee
	if (!dead) {
	try {
	log.display("Disconnecting debuggee");
	debugee.dispose();
	log.display(" ... debuggee disconnected");
	} catch (Failure e) {
	log.display("Failed to finally disconnect debuggee:\n\t"
	+ e.getMessage());
	}
	}

	// wait for debugee exited
	log.display("Waiting for debuggee exit");
	int code = debugee.waitFor();
	log.display(" ... debuggee exited with exit code: " + code);

	// analize debugee exit status code
	if (code != JCK_STATUS_BASE + PASSED) {
	log.complain("Debuggee FAILED with exit code: " + code);
	success = false;
	}
	}

	// return string representation of kind of invoked method
	private static String methodKind(int kind) {
	switch (kind) {
	case redefinecls001b.METHOD_NOT_INVOKED:
	return "METHOD_NOT_INVOKED";
	case redefinecls001b.REDEFINED_METHOD_INVOKED:
	return "REDEFINED_METHOD_INVOKED";
	case redefinecls001b.NOT_REDEFINED_METHOD_INVOKED:
	return "NOT_REDEFINED_METHOD_INVOKED";
	default:
	return "UNKNOWN_METHOD_KIND";
	}
	}
	}