diff options
Diffstat (limited to 'gcc-4.4.3/libjava/classpath/gnu/classpath/jdwp/processor/PacketProcessor.java')
| -rw-r--r-- | gcc-4.4.3/libjava/classpath/gnu/classpath/jdwp/processor/PacketProcessor.java | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/classpath/jdwp/processor/PacketProcessor.java b/gcc-4.4.3/libjava/classpath/gnu/classpath/jdwp/processor/PacketProcessor.java new file mode 100644 index 000000000..4df3f4728 --- /dev/null +++ b/gcc-4.4.3/libjava/classpath/gnu/classpath/jdwp/processor/PacketProcessor.java @@ -0,0 +1,221 @@ +/* PacketProcessor.java -- a thread which processes command packets + from the debugger + Copyright (C) 2005, 2006 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.classpath.jdwp.processor; + +import gnu.classpath.jdwp.Jdwp; +import gnu.classpath.jdwp.JdwpConstants; +import gnu.classpath.jdwp.exception.JdwpException; +import gnu.classpath.jdwp.transport.JdwpCommandPacket; +import gnu.classpath.jdwp.transport.JdwpConnection; +import gnu.classpath.jdwp.transport.JdwpPacket; +import gnu.classpath.jdwp.transport.JdwpReplyPacket; + +import java.io.ByteArrayOutputStream; +import java.io.DataOutputStream; +import java.io.IOException; +import java.nio.ByteBuffer; +import java.security.PrivilegedAction; + +/** + * This class is responsible for processing packets from the + * debugger. It waits for an available packet from the connection + * ({@link gnu.classpath.jdwp.transport.JdwpConnection}) and then + * processes the packet and any reply. + * + * @author Keith Seitz (keiths@redhat.com) + */ +public class PacketProcessor + implements PrivilegedAction +{ + // The connection to the debugger + private JdwpConnection _connection; + + // Shutdown this thread? + private boolean _shutdown; + + // A Mapping of the command set (Byte) to the specific CommandSet + private CommandSet[] _sets; + + // Contents of the ReplyPackets data field + private ByteArrayOutputStream _outputBytes; + + // Output stream around _outputBytes + private DataOutputStream _os; + + /** + * Constructs a new <code>PacketProcessor</code> object + * Connection must be validated before getting here! + * + * @param con the connection + */ + public PacketProcessor (JdwpConnection con) + { + _connection = con; + _shutdown = false; + + // MAXIMUM is the value of the largest command set we may receive + _sets = new CommandSet[JdwpConstants.CommandSet.MAXIMUM + 1]; + _outputBytes = new ByteArrayOutputStream(); + _os = new DataOutputStream (_outputBytes); + + // Create all the Command Sets and add them to our array + _sets[JdwpConstants.CommandSet.VirtualMachine.CS_VALUE] = + new VirtualMachineCommandSet(); + _sets[JdwpConstants.CommandSet.ReferenceType.CS_VALUE] = + new ReferenceTypeCommandSet(); + _sets[JdwpConstants.CommandSet.ClassType.CS_VALUE] = + new ClassTypeCommandSet(); + _sets[JdwpConstants.CommandSet.ArrayType.CS_VALUE] = + new ArrayTypeCommandSet(); + _sets[JdwpConstants.CommandSet.InterfaceType.CS_VALUE] = + new InterfaceTypeCommandSet(); + _sets[JdwpConstants.CommandSet.Method.CS_VALUE] = + new MethodCommandSet(); + _sets[JdwpConstants.CommandSet.Field.CS_VALUE] = + new FieldCommandSet(); + _sets[JdwpConstants.CommandSet.ObjectReference.CS_VALUE] = + new ObjectReferenceCommandSet(); + _sets[JdwpConstants.CommandSet.StringReference.CS_VALUE] = + new StringReferenceCommandSet(); + _sets[JdwpConstants.CommandSet.ThreadReference.CS_VALUE] = + new ThreadReferenceCommandSet(); + _sets[JdwpConstants.CommandSet.ThreadGroupReference.CS_VALUE] = + new ThreadGroupReferenceCommandSet(); + _sets[JdwpConstants.CommandSet.ArrayReference.CS_VALUE] = + new ArrayReferenceCommandSet(); + _sets[JdwpConstants.CommandSet.ClassLoaderReference.CS_VALUE] = + new ClassLoaderReferenceCommandSet(); + _sets[JdwpConstants.CommandSet.EventRequest.CS_VALUE] = + new EventRequestCommandSet(); + _sets[JdwpConstants.CommandSet.StackFrame.CS_VALUE] = + new StackFrameCommandSet(); + _sets[JdwpConstants.CommandSet.ClassObjectReference.CS_VALUE] = + new ClassObjectReferenceCommandSet(); + } + + /** + * Main run routine for this thread. Will loop getting packets + * from the connection and processing them. + */ + public Object run () + { + // Notify initialization thread (gnu.classpath.jdwp.Jdwp) that + // the PacketProcessor thread is ready. + Jdwp.getDefault().subcomponentInitialized (); + + try + { + while (!_shutdown) + { + _processOnePacket (); + } + } + catch (Exception ex) + { + ex.printStackTrace(); + } + // Time to shutdown, tell Jdwp to shutdown + Jdwp.getDefault().shutdown(); + return null; + } + + /** + * Shutdown the packet processor + */ + public void shutdown () + { + _shutdown = true; + } + + // Helper function which actually does all the work of waiting + // for a packet and getting it processed. + private void _processOnePacket () + throws IOException + { + JdwpPacket pkt = _connection.getPacket (); + + if (!(pkt instanceof JdwpCommandPacket)) + { + // We're not supposed to get these from the debugger! + // Drop it on the floor + return; + } + + if (pkt != null) + { + JdwpCommandPacket commandPkt = (JdwpCommandPacket) pkt; + JdwpReplyPacket reply = new JdwpReplyPacket(commandPkt); + + // Reset our output stream + _outputBytes.reset(); + + // Create a ByteBuffer around the command packet + ByteBuffer bb = ByteBuffer.wrap(commandPkt.getData()); + byte command = commandPkt.getCommand(); + byte commandSet = commandPkt.getCommandSet(); + + CommandSet set = null; + try + { + // There is no command set with value 0 + if (commandSet > 0 && commandSet < _sets.length) + { + set = _sets[commandPkt.getCommandSet()]; + } + if (set != null) + { + _shutdown = set.runCommand(bb, _os, command); + reply.setData(_outputBytes.toByteArray()); + } + else + { + // This command set wasn't in our tree + reply.setErrorCode(JdwpConstants.Error.NOT_IMPLEMENTED); + } + } + catch (JdwpException ex) + { + reply.setErrorCode(ex.getErrorCode ()); + } + _connection.sendPacket (reply); + } + } +} |