1 /* ThreadGroupReferenceCommandSet.java -- class to implement the 2 ThreadGroupReference Command Set 3 Copyright (C) 2005 Free Software Foundation 4 5 This file is part of GNU Classpath. 6 7 GNU Classpath is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 2, or (at your option) 10 any later version. 11 12 GNU Classpath is distributed in the hope that it will be useful, but 13 WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with GNU Classpath; see the file COPYING. If not, write to the 19 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 20 02110-1301 USA. 21 22 Linking this library statically or dynamically with other modules is 23 making a combined work based on this library. Thus, the terms and 24 conditions of the GNU General Public License cover the whole 25 combination. 26 27 As a special exception, the copyright holders of this library give you 28 permission to link this library with independent modules to produce an 29 executable, regardless of the license terms of these independent 30 modules, and to copy and distribute the resulting executable under 31 terms of your choice, provided that you also meet, for each linked 32 independent module, the terms and conditions of the license of that 33 module. An independent module is a module which is not derived from 34 or based on this library. If you modify this library, you may extend 35 this exception to your version of the library, but you are not 36 obligated to do so. If you do not wish to do so, delete this 37 exception statement from your version. */ 38 39 40 package gnu.classpath.jdwp.processor; 41 42 import gnu.classpath.jdwp.JdwpConstants; 43 import gnu.classpath.jdwp.exception.JdwpException; 44 import gnu.classpath.jdwp.exception.JdwpInternalErrorException; 45 import gnu.classpath.jdwp.exception.NotImplementedException; 46 import gnu.classpath.jdwp.id.ObjectId; 47 import gnu.classpath.jdwp.util.JdwpString; 48 49 import java.io.DataOutputStream; 50 import java.io.IOException; 51 import java.nio.ByteBuffer; 52 53 /** 54 * A class representing the ThreadGroupReference Command Set. 55 * 56 * @author Aaron Luchko <aluchko@redhat.com> 57 */ 58 public class ThreadGroupReferenceCommandSet 59 extends CommandSet 60 { runCommand(ByteBuffer bb, DataOutputStream os, byte command)61 public boolean runCommand(ByteBuffer bb, DataOutputStream os, byte command) 62 throws JdwpException 63 { 64 try 65 { 66 switch (command) 67 { 68 case JdwpConstants.CommandSet.ThreadGroupReference.NAME: 69 executeName(bb, os); 70 break; 71 case JdwpConstants.CommandSet.ThreadGroupReference.PARENT: 72 executeParent(bb, os); 73 break; 74 case JdwpConstants.CommandSet.ThreadGroupReference.CHILDREN: 75 executeChildren(bb, os); 76 break; 77 default: 78 throw new NotImplementedException("Command " + command + 79 " not found in ThreadGroupReference Command Set."); 80 } 81 } 82 catch (IOException ex) 83 { 84 // The DataOutputStream we're using isn't talking to a socket at all 85 // So if we throw an IOException we're in serious trouble 86 throw new JdwpInternalErrorException(ex); 87 } 88 89 return false; 90 } 91 executeName(ByteBuffer bb, DataOutputStream os)92 private void executeName(ByteBuffer bb, DataOutputStream os) 93 throws JdwpException, IOException 94 { 95 ObjectId oid = idMan.readObjectId(bb); 96 ThreadGroup group = (ThreadGroup) oid.getObject(); 97 JdwpString.writeString(os, group.getName()); 98 } 99 executeParent(ByteBuffer bb, DataOutputStream os)100 private void executeParent(ByteBuffer bb, DataOutputStream os) 101 throws JdwpException, IOException 102 { 103 ObjectId oid = idMan.readObjectId(bb); 104 ThreadGroup group = (ThreadGroup) oid.getObject(); 105 ThreadGroup parent = group.getParent(); 106 if (parent == null) { 107 os.writeLong(0L); 108 } else { 109 ObjectId parentId = idMan.getObjectId(parent); 110 parentId.write(os); 111 } 112 } 113 executeChildren(ByteBuffer bb, DataOutputStream os)114 private void executeChildren(ByteBuffer bb, DataOutputStream os) 115 throws JdwpException, IOException 116 { 117 ObjectId oid = idMan.readObjectId(bb); 118 ThreadGroup group = (ThreadGroup) oid.getObject(); 119 120 ThreadGroup jdwpGroup = Thread.currentThread().getThreadGroup(); 121 int numThreads = group.activeCount(); 122 Thread allThreads[] = new Thread[numThreads]; 123 124 group.enumerate(allThreads, false); 125 126 // We need to loop through for the true count since some threads may have 127 // been destroyed since we got activeCount so those spots in the array will 128 // be null. As well we must ignore any threads that belong to jdwp 129 numThreads = 0; 130 for (int i = 0; i < allThreads.length; i++) 131 { 132 Thread thread = allThreads[i]; 133 if (thread == null) 134 break; // No threads after this point 135 if (!thread.getThreadGroup().equals(jdwpGroup)) 136 numThreads++; 137 } 138 139 os.writeInt(numThreads); 140 141 for (int i = 0; i < allThreads.length; i++) 142 { 143 Thread thread = allThreads[i]; 144 if (thread == null) 145 break; // No threads after this point 146 if (!thread.getThreadGroup().equals(jdwpGroup)) 147 idMan.getObjectId(thread).write(os); 148 } 149 150 int numGroups = group.activeCount(); 151 ThreadGroup allGroups[] = new ThreadGroup[numGroups]; 152 153 group.enumerate(allGroups, false); 154 155 // We need to loop through for the true count since some ThreadGroups may 156 // have been destroyed since we got activeCount so those spots in the array 157 // will be null. As well we must ignore any threads that belong to jdwp. 158 numGroups = 0; 159 for (int i = 0; i < allGroups.length; i++) 160 { 161 ThreadGroup tgroup = allGroups[i]; 162 if (tgroup == null) 163 break; // No ThreadGroups after this point 164 if (!tgroup.equals(jdwpGroup)) 165 numGroups++; 166 } 167 168 os.writeInt(numGroups); 169 170 for (int i = 0; i < allGroups.length; i++) 171 { 172 ThreadGroup tgroup = allGroups[i]; 173 if (tgroup == null) 174 break; // No ThreadGroups after this point 175 if (!tgroup.equals(jdwpGroup)) 176 idMan.getObjectId(tgroup).write(os); 177 } 178 } 179 } 180