| /* |
| * Copyright (c) 2007, 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.jdi.ObjectReference.referringObjects.referringObjects002; |
| |
| import nsk.share.ClassUnloader; |
| import nsk.share.ObjectInstancesManager; |
| import nsk.share.ReferringObject; |
| import nsk.share.TestBug; |
| import nsk.share.jdi.HeapwalkingDebuggee; |
| import java.io.*; |
| import java.util.*; |
| |
| /* |
| * Class create and save given number of class instances |
| */ |
| class Instances { |
| Instances(Class<?> klass, int instanceCount) { |
| try { |
| for (int i = 0; i < instanceCount; i++) |
| instances.add(klass.newInstance()); |
| } catch (Throwable t) { |
| throw new TestBug("Unexpected error during test class instantiation: " + t); |
| } |
| } |
| |
| private List<Object> instances = new ArrayList<Object>(); |
| } |
| |
| /* |
| * Debuggee class handle request for loading classes with custom classloader and creating class instances |
| */ |
| public class referringObjects002a extends HeapwalkingDebuggee { |
| private Map<String, Instances> classesInstances = new HashMap<String, Instances>(); |
| |
| private List<ReferringObject> classReferrers = new ArrayList<ReferringObject>(); |
| |
| final static public String COMMAND_DELETE_CLASS_OBJECT_REFERRERS = "deleteClassObjectReferrers"; |
| |
| public static void main(String args[]) { |
| new referringObjects002a().doTest(args); |
| } |
| |
| // create references of all possible types to class object |
| public void createClassObjectReferrers(String className, int instanceCount) { |
| ClassUnloader unloader = loadedClasses.get(className); |
| |
| if (unloader == null) |
| throw new TestBug("Unloader is null for class: " + className); |
| |
| Class<?> klass = unloader.getLoadedClass(); |
| |
| if (klass == null) |
| throw new TestBug("Unloader return null class object, for classname: " + className); |
| |
| classesInstances.put(className, new Instances(klass, instanceCount)); |
| |
| for (String referenceType : ObjectInstancesManager.allReferenceTypes) |
| classReferrers.add(new ReferringObject(klass, referenceType)); |
| } |
| |
| // delete all created references to class object |
| public void deleteClassObjectReferrers() { |
| classesInstances = null; |
| |
| for (ReferringObject referrer : classReferrers) |
| referrer.delete(); |
| |
| classReferrers.clear(); |
| } |
| |
| public boolean parseCommand(String command) { |
| if (super.parseCommand(command)) { |
| // need do some additional actions for COMMAND_LOAD_CLASS |
| if (!command.startsWith(COMMAND_LOAD_CLASS)) |
| return true; |
| } |
| |
| try { |
| StreamTokenizer tokenizer = new StreamTokenizer(new StringReader(command)); |
| tokenizer.whitespaceChars(':', ':'); |
| |
| if (command.startsWith(COMMAND_LOAD_CLASS)) { |
| tokenizer.nextToken(); |
| |
| if (tokenizer.nextToken() != StreamTokenizer.TT_WORD) |
| throw new IllegalArgumentException("Invalid command format"); |
| |
| String className = tokenizer.sval; |
| |
| if (tokenizer.nextToken() != StreamTokenizer.TT_NUMBER) |
| throw new IllegalArgumentException("Invalid command format"); |
| |
| int instanceCount = (int) tokenizer.nval; |
| |
| createClassObjectReferrers(className, instanceCount); |
| |
| return true; |
| } else if (command.equals(COMMAND_DELETE_CLASS_OBJECT_REFERRERS)) { |
| deleteClassObjectReferrers(); |
| |
| return true; |
| } |
| } catch (IOException e) { |
| throw new TestBug("Invalid command format: " + command); |
| } |
| |
| return false; |
| } |
| |
| } |