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/*
* Copyright (c) 2006, 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.share.jdi;
import java.io.*;
import java.util.*;
import nsk.share.Log;
import nsk.share.ObjectInstancesManager;
import nsk.share.TestBug;
import nsk.share.jpda.DebugeeArgumentHandler;
import nsk.share.jpda.IOPipe;
/*
* Debuggee class used in tests for heapwalking(tests for VirtualMachine.instanceCounts, ReferenceType.instances, ObjectReference.referrers).
* Handle commands related to creation of objects instances with given reference type
* and given referrers number, use for this purposes nsk.share.ObjectInstancesManager.
*/
public class HeapwalkingDebuggee extends AbstractJDIDebuggee {
protected ObjectInstancesManager objectInstancesManager;
// reference of this type should be included in ObjectReference.referringObjects
public static Set<String> includedIntoReferrersCountTypes = new HashSet<String>();
// reference of this type should be included in ReferenceType.instances
public static Set<String> includedIntoInstancesCountTypes = new HashSet<String>();
static {
includedIntoInstancesCountTypes.add(ObjectInstancesManager.STRONG_REFERENCE);
includedIntoInstancesCountTypes.add(ObjectInstancesManager.WEAK_REFERENCE);
includedIntoInstancesCountTypes.add(ObjectInstancesManager.SOFT_REFERENCE);
includedIntoInstancesCountTypes.add(ObjectInstancesManager.PHANTOM_REFERENCE);
includedIntoInstancesCountTypes.add(ObjectInstancesManager.JNI_GLOBAL_REFERENCE);
includedIntoInstancesCountTypes.add(ObjectInstancesManager.JNI_LOCAL_REFERENCE);
includedIntoReferrersCountTypes.add(ObjectInstancesManager.STRONG_REFERENCE);
includedIntoReferrersCountTypes.add(ObjectInstancesManager.WEAK_REFERENCE);
includedIntoReferrersCountTypes.add(ObjectInstancesManager.SOFT_REFERENCE);
includedIntoReferrersCountTypes.add(ObjectInstancesManager.PHANTOM_REFERENCE);
}
//create number instance of class with given name, command format: createInstances:class_name:instance_count[:referrer_count:referrer_type]
static public final String COMMAND_CREATE_INSTANCES = "createInstances";
//'delete'(make unreachable) number instance of class with given name, command format: deleteInstances:class_name:instance_count:referrer_count
static public final String COMMAND_DELETE_INSTANCES = "deleteInstances";
//delete number referrers
static public final String COMMAND_DELETE_REFERRERS = "deleteReferrers";
//create instance with all type referrers
static public final String COMMAND_CREATE_ALL_TYPE_REFERENCES = "createAllTypeReferences";
protected void init(String args[]) {
super.init(args);
objectInstancesManager = new ObjectInstancesManager(log);
}
public void initDebuggee(DebugeeArgumentHandler argHandler, Log log, IOPipe pipe, String args[], boolean callExit) {
super.initDebuggee(argHandler, log, pipe, args, callExit);
objectInstancesManager = new ObjectInstancesManager(log);
}
public boolean parseCommand(String command) {
if (super.parseCommand(command))
return true;
try {
StreamTokenizer tokenizer = new StreamTokenizer(new StringReader(command));
tokenizer.whitespaceChars(':', ':');
tokenizer.wordChars('_', '_');
tokenizer.wordChars('$', '$');
tokenizer.wordChars('[', ']');
tokenizer.wordChars('|', '|');
if (command.startsWith(COMMAND_CREATE_INSTANCES)) {
//createInstances:class_name:instance_count[:referrer_count:referrer_type]
tokenizer.nextToken();
if (tokenizer.nextToken() != StreamTokenizer.TT_WORD)
throw new TestBug("Invalid command format: " + command);
String className = tokenizer.sval;
if (tokenizer.nextToken() != StreamTokenizer.TT_NUMBER)
throw new TestBug("Invalid command format: " + command);
int instanceCounts = (int) tokenizer.nval;
int referrerCount = 1;
Set<String> referrerType = new HashSet<String>();
if (tokenizer.nextToken() == StreamTokenizer.TT_NUMBER) {
referrerCount = (int) tokenizer.nval;
if (tokenizer.nextToken() == StreamTokenizer.TT_WORD)
referrerType.addAll(Arrays.asList(tokenizer.sval.split("\\|")));
}
if (referrerType.isEmpty()) {
referrerType.add(ObjectInstancesManager.STRONG_REFERENCE);
}
objectInstancesManager.createReferences(instanceCounts, className, referrerCount, referrerType);
return true;
} else if (command.startsWith(COMMAND_DELETE_INSTANCES)) {
//deleteInstances:class_name:instance_count:referrer_count
tokenizer.nextToken();
if (tokenizer.nextToken() != StreamTokenizer.TT_WORD)
throw new TestBug("Invalid command format: " + command);
String className = tokenizer.sval;
if (tokenizer.nextToken() != StreamTokenizer.TT_NUMBER)
throw new TestBug("Invalid command format: " + command);
int instanceCounts = (int) tokenizer.nval;
objectInstancesManager.deleteAllReferrers(instanceCounts, className);
return true;
} else if (command.startsWith(COMMAND_DELETE_REFERRERS)) {
tokenizer.nextToken();
if (tokenizer.nextToken() != StreamTokenizer.TT_WORD)
throw new TestBug("Invalid command format: " + command);
String className = tokenizer.sval;
if (tokenizer.nextToken() != StreamTokenizer.TT_NUMBER)
throw new TestBug("Invalid command format: " + command);
int referrersCount = (int) tokenizer.nval;
Set<String> referrerTypes = new HashSet<String>();
if (tokenizer.nextToken() == StreamTokenizer.TT_WORD) {
referrerTypes.addAll(Arrays.asList(tokenizer.sval.split("\\|")));
}
objectInstancesManager.deleteReferrers(className, referrersCount, referrerTypes);
return true;
} else if (command.startsWith(COMMAND_CREATE_ALL_TYPE_REFERENCES)) {
tokenizer.nextToken();
if (tokenizer.nextToken() != StreamTokenizer.TT_WORD)
throw new TestBug("Invalid command format: " + command);
String className = tokenizer.sval;
if (tokenizer.nextToken() != StreamTokenizer.TT_NUMBER)
throw new TestBug("Invalid command format: " + command);
int instanceCounts = (int) tokenizer.nval;
objectInstancesManager.createAllTypeReferences(className, instanceCounts);
return true;
}
} catch (IOException e) {
throw new TestBug("Invalid command format: " + command);
}
return false;
}
// instances of some classes couldn't be strictly controlled during test execution, use non-strict checks for this classes
public static boolean useStrictCheck(String className, boolean otherThreadPresent) {
if (className.equals("java.lang.String"))
return false;
if (className.equals("char[]"))
return false;
if (className.equals("byte[]"))
return false;
if (className.equals("java.lang.Thread")) {
if (otherThreadPresent)
return false;
}
return true;
}
// is reference with given type should be included in ObjectReference.referringObjects
static public boolean isIncludedIntoReferrersCount(String referenceType) {
if (!ObjectInstancesManager.allReferenceTypes.contains(referenceType)) {
throw new TestBug("Invalid reference type: " + referenceType);
}
return includedIntoReferrersCountTypes.contains(referenceType);
}
// is reference with given type should be included in ReferenceType.instances
static public boolean isIncludedIntoInstancesCount(String referenceType) {
if (!ObjectInstancesManager.allReferenceTypes.contains(referenceType)) {
throw new TestBug("Invalid reference type: " + referenceType);
}
return includedIntoInstancesCountTypes.contains(referenceType);
}
public static void main(String args[]) {
HeapwalkingDebuggee debuggee = new HeapwalkingDebuggee();
debuggee.init(args);
debuggee.doTest();
}
}
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