| /* StackFrameCommandSet.java -- class to implement the StackFrame Command Set |
| Copyright (C) 2005 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.JdwpConstants; |
| import gnu.classpath.jdwp.VMFrame; |
| import gnu.classpath.jdwp.VMVirtualMachine; |
| import gnu.classpath.jdwp.exception.JdwpException; |
| import gnu.classpath.jdwp.exception.JdwpInternalErrorException; |
| import gnu.classpath.jdwp.exception.NotImplementedException; |
| import gnu.classpath.jdwp.id.ObjectId; |
| import gnu.classpath.jdwp.util.Value; |
| |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| |
| /** |
| * A class representing the StackFrame Command Set. |
| * |
| * @author Aaron Luchko <aluchko@redhat.com> |
| */ |
| public class StackFrameCommandSet |
| extends CommandSet |
| { |
| public boolean runCommand(ByteBuffer bb, DataOutputStream os, byte command) |
| throws JdwpException |
| { |
| boolean keepRunning = true; |
| try |
| { |
| switch (command) |
| { |
| case JdwpConstants.CommandSet.StackFrame.GET_VALUES: |
| executeGetValues(bb, os); |
| break; |
| case JdwpConstants.CommandSet.StackFrame.SET_VALUES: |
| executeSetValues(bb, os); |
| break; |
| case JdwpConstants.CommandSet.StackFrame.THIS_OBJECT: |
| executeThisObject(bb, os); |
| break; |
| case JdwpConstants.CommandSet.StackFrame.POP_FRAMES: |
| executePopFrames(bb, os); |
| break; |
| default: |
| throw new NotImplementedException("Command " + command + |
| " not found in Stack Frame Command Set."); |
| } |
| } |
| catch (IOException ex) |
| { |
| // The DataOutputStream we're using isn't talking to a socket at all |
| // So if we throw an IOException we're in serious trouble |
| throw new JdwpInternalErrorException(ex); |
| } |
| |
| return false; |
| } |
| |
| private void executeGetValues(ByteBuffer bb, DataOutputStream os) |
| throws JdwpException, IOException |
| { |
| ObjectId tId = idMan.readObjectId(bb); |
| Thread thread = (Thread) tId.getObject(); |
| |
| // Although Frames look like other ids they are not. First they are not |
| // ObjectIds since they don't exist in the users code. Storing them as an |
| // ObjectId would mean they could be garbage collected since no one else |
| // has a reference to them. Furthermore they are not ReferenceTypeIds since |
| // these are held permanently and we want these to be held only as long as |
| // the Thread is suspended. |
| VMFrame frame = VMVirtualMachine.getFrame(thread, bb); |
| int slots = bb.getInt(); |
| os.writeInt(slots); // Looks pointless but this is the protocol |
| for (int i = 0; i < slots; i++) |
| { |
| int slot = bb.getInt(); |
| byte sig = bb.get(); |
| Object val = frame.getValue(slot); |
| Value.writeTaggedValue(os, val); |
| } |
| } |
| |
| private void executeSetValues(ByteBuffer bb, DataOutputStream os) |
| throws JdwpException, IOException |
| { |
| ObjectId tId = idMan.readObjectId(bb); |
| Thread thread = (Thread) tId.getObject(); |
| |
| VMFrame frame = VMVirtualMachine.getFrame(thread, bb); |
| |
| int slots = bb.getInt(); |
| for (int i = 0; i < slots; i++) |
| { |
| int slot = bb.getInt(); |
| Object value = Value.getObj(bb); |
| frame.setValue(slot, value); |
| } |
| } |
| |
| private void executeThisObject(ByteBuffer bb, DataOutputStream os) |
| throws JdwpException, IOException |
| { |
| ObjectId tId = idMan.readObjectId(bb); |
| Thread thread = (Thread) tId.getObject(); |
| |
| VMFrame frame = VMVirtualMachine.getFrame(thread, bb); |
| |
| Object thisObject = frame.getObject(); |
| Value.writeTaggedValue(os, thisObject); |
| } |
| |
| private void executePopFrames(ByteBuffer bb, DataOutputStream os) |
| throws JdwpException |
| { |
| // This command is optional, determined by VirtualMachines CapabilitiesNew |
| // so we'll leave it till later to implement |
| throw new NotImplementedException("Command PopFrames not implemented."); |
| } |
| } |