*gnu/classpath/jdwp/processor/StackFrameCommandSet.java:

        Implemented the StackFrame CommandSet.

1 files changed, 164 insertions, 0 deletions

diff --git a/gnu/classpath/jdwp/processor/StackFrameCommandSet.java b/gnu/classpath/jdwp/processor/StackFrameCommandSet.java
new file mode 100644
index 000000000..b69039768
--- /dev/null
+++ b/gnu/classpath/jdwp/processor/StackFrameCommandSet.java
@@ -0,0 +1,164 @@
+/* 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., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 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.IVirtualMachine;
+import gnu.classpath.jdwp.Jdwp;
+import gnu.classpath.jdwp.JdwpConstants;
+import gnu.classpath.jdwp.exception.JdwpException;
+import gnu.classpath.jdwp.exception.JdwpInternalErrorException;
+import gnu.classpath.jdwp.exception.NotImplementedException;
+import gnu.classpath.jdwp.id.IdManager;
+import gnu.classpath.jdwp.id.ObjectId;
+import gnu.classpath.jdwp.util.Frame;
+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 implements CommandSet
+{
+  // Our hook into the jvm
+  private final IVirtualMachine vm = Jdwp.getIVirtualMachine();
+
+  // Manages all the different ids that are assigned by jdwp
+  private final IdManager idMan = Jdwp.getIdManager();
+
+  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 true;
+  }
+
+  private void executeGetValues(ByteBuffer bb, DataOutputStream os)
+      throws JdwpException, IOException
+  {
+    ObjectId tId = idMan.readId(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.
+    Frame frame = vm.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.readId(bb);
+    Thread thread = (Thread) tId.getObject();
+
+    Frame frame = vm.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.readId(bb);
+    Thread thread = (Thread) tId.getObject();
+
+    Frame frame = vm.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.");
+  }
+}