diff options
Diffstat (limited to 'gcc-4.4.3/libjava/classpath/gnu/classpath/jdwp/processor/StackFrameCommandSet.java')
| -rw-r--r-- | gcc-4.4.3/libjava/classpath/gnu/classpath/jdwp/processor/StackFrameCommandSet.java | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/classpath/jdwp/processor/StackFrameCommandSet.java b/gcc-4.4.3/libjava/classpath/gnu/classpath/jdwp/processor/StackFrameCommandSet.java new file mode 100644 index 000000000..2d90e8064 --- /dev/null +++ b/gcc-4.4.3/libjava/classpath/gnu/classpath/jdwp/processor/StackFrameCommandSet.java @@ -0,0 +1,170 @@ +/* StackFrameCommandSet.java -- class to implement the StackFrame Command Set + Copyright (C) 2005, 2007 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.ThreadId; +import gnu.classpath.jdwp.value.ObjectValue; +import gnu.classpath.jdwp.value.Value; +import gnu.classpath.jdwp.value.ValueFactory; + +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 + { + ThreadId tId = (ThreadId) idMan.readObjectId(bb); + Thread thread = tId.getThread(); + + // 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. + long frameID = bb.getLong(); + VMFrame frame = VMVirtualMachine.getFrame(thread, frameID); + 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(); + Value val = frame.getValue(slot, sig); + val.writeTagged(os); + } + } + + private void executeSetValues(ByteBuffer bb, DataOutputStream os) + throws JdwpException, IOException + { + ThreadId tId = (ThreadId) idMan.readObjectId(bb); + Thread thread = tId.getThread(); + + long frameID = bb.getLong(); + VMFrame frame = VMVirtualMachine.getFrame(thread, frameID); + + int slots = bb.getInt(); + for (int i = 0; i < slots; i++) + { + int slot = bb.getInt(); + Value value = ValueFactory.createFromTagged(bb); + frame.setValue(slot, value); + } + } + + private void executeThisObject(ByteBuffer bb, DataOutputStream os) + throws JdwpException, IOException + { + ThreadId tId = (ThreadId) idMan.readObjectId(bb); + Thread thread = tId.getThread(); + + long frameID = bb.getLong(); + VMFrame frame = VMVirtualMachine.getFrame(thread, frameID); + + ObjectValue objVal = new ObjectValue(frame.getObject()); + objVal.writeTagged(os); + } + + private void executePopFrames(ByteBuffer bb, DataOutputStream os) + throws JdwpException, IOException + { + if (!VMVirtualMachine.canPopFrames) + { + String msg = "popping frames is unsupported"; + throw new NotImplementedException(msg); + } + + ThreadId tid = (ThreadId) idMan.readObjectId(bb); + Thread thread = tid.getThread(); + long fid = bb.getLong(); + VMVirtualMachine.popFrames(thread, fid); + } +} |