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135 lines
3.7 KiB
Java
135 lines
3.7 KiB
Java
/* VMFrame.java -- Reference implementation of VM hooks for JDWP Frame access.
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Copyright (C) 2005, 2006, 2007 Free Software Foundation
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.classpath.jdwp;
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import gnu.classpath.jdwp.util.Location;
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import gnu.classpath.jdwp.value.Value;
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/**
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* Reference implementation of VM hooks for JDWP Frame access.
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*
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* @author aluchko
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*/
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public class VMFrame
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{
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/**
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* Returns the size of a frame ID over JDWP
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*/
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public static final int SIZE = 8;
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// The thread this frame resides in
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private Thread thread;
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//The object of this frame
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private Object obj;
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// The current location of this frame
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private Location loc;
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// id of this frame
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private long id;
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/**
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* Create a new VMFrame object.
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*
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* @param thr a Thread, the thread this frame is in
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* @param frame_id a long, the jframeID of this frame
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* @param frame_loc a Location, the location of this frame
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*/
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public VMFrame(Thread thr, long frame_id, Location frame_loc,
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Object frame_obj)
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{
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thread = thr;
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id = frame_id;
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loc = frame_loc;
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obj = frame_obj;
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}
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/**
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* Gets the current location of the frame.
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*/
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public Location getLocation()
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{
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return loc;
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}
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/**
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* Returns the value of the variable in the given slot.
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*
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* @param slot the slot containing the variable
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*/
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public native Value getValue(int slot, byte sig);
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/**
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* Assigns the given variable to the given value.
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* @param slot The slot which contains the variable
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* @param value The value to assign the variable to
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*/
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public native void setValue(int slot, Value value);
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/**
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* Get the thread this frame is in.
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*/
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public Thread getThread()
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{
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return thread;
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}
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/**
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* Get the object which is represented by 'this' in the context of the frame,
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* returns null if the method is native or static.
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*/
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public Object getObject()
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{
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return obj;
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}
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/**
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* Get the frameID
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* @return an id which is unique within the scope of the VM
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*/
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public long getId()
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{
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return id;
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}
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}
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