* Ericsson               - Added support for Mac OS

		if (version.startsWith(LaunchUtils.MACOS_GDB_PREFIX)) {

			// Mac OS's GDB does not support Non-Stop

			return false;

		}

 * Ericsson   - Added support for Mac OS

	/**

	 * A prefix that we use to indicate that a GDB version is for MAC OS

	 * @since 2.1

	 */

	public static final String MACOS_GDB_PREFIX = "APPLE"; //$NON-NLS-1$

import org.eclipse.cdt.dsf.gdb.launching.LaunchUtils;

import org.eclipse.cdt.dsf.gdb.service.macos.MacOSGDBExpressions;

import org.eclipse.cdt.dsf.mi.service.MIExpressions;

	// Contains the GDB version string such as

	// 7.0

	// 6.8.50.20090218

	// For MacOS, it contains the Apple version number, such as

	// 969

	// 1465

	// Indicate if we are dealing with a Mac OS GDB

	private boolean fIsMacOSGdb = false;

		if (fIsMacOSGdb) {

			return new MIBreakpointsManager(session, CDebugCorePlugin.PLUGIN_ID);

		}

		if (fIsMacOSGdb) {

			return new MIBreakpoints(session);

		}

		if (fIsMacOSGdb) {

			return new GDBControl(session, config);

		}

		if (fIsMacOSGdb) {

			return new GDBBackend(session, lc);

		}

		if (fIsMacOSGdb) {

			return new MIDisassembly(session);

		}

		if (fIsMacOSGdb) {

			return new MacOSGDBExpressions(session);

		}

		if (fIsMacOSGdb) {

			return new MIMemory(session);

		}

		if (fIsMacOSGdb) {

			return new MIModules(session);

		}

		if (fIsMacOSGdb) {

			return new GDBProcesses(session);

		}

		if (fIsMacOSGdb) {

			return new MIRegisters(session);

		}

		if (fIsMacOSGdb) {

			return new GDBRunControl(session);

		}

		if (fIsMacOSGdb) {

			return new CSourceLookup(session);

		}

		if (fIsMacOSGdb) {

			return new MIStack(session);

		}

/*******************************************************************************

 * Copyright (c) 2010 Wind River Systems and others.

 * All rights reserved. This program and the accompanying materials

 * are made available under the terms of the Eclipse Public License v1.0

 * which accompanies this distribution, and is available at

 * http://www.eclipse.org/legal/epl-v10.html

 * 

 * Contributors:

 *     Wind River Systems - initial API and implementation

 *     Ericsson 		  - Modified for handling of multiple execution contexts

 *     Ericsson           - Created the MacOS version

 *******************************************************************************/

package org.eclipse.cdt.dsf.gdb.service.macos;

import org.eclipse.cdt.dsf.mi.service.MIExpressions;

import org.eclipse.cdt.dsf.mi.service.MIVariableManager;

import org.eclipse.cdt.dsf.service.DsfSession;

/**

 * This class implements a debugger expression evaluator as a DSF service. The

 * primary interface that clients of this class should use is IExpressions.

 * 

 * This class used to be name ExpressionService in the 1.1 release.

 * 

 * @since 2.1

 */

public class MacOSGDBExpressions extends MIExpressions {

    public MacOSGDBExpressions(DsfSession session) {

        super(session);

    }

    @Override

    protected MIVariableManager createMIVariableManager() {

        return new MacOSGDBVariableManager(getSession(), getServicesTracker());

    }

}

/*******************************************************************************

 * Copyright (c) 2010 Monta Vista and others.

 * All rights reserved. This program and the accompanying materials

 * are made available under the terms of the Eclipse Public License v1.0

 * which accompanies this distribution, and is available at

 * http://www.eclipse.org/legal/epl-v10.html

 * 

 * Contributors:

 *     Monta Vista - initial API and implementation

 *     Ericsson    - Modified for handling of multiple execution contexts

 *     Ericsson    - Major updates for GDB/MI implementation

 *     Ericsson    - Major re-factoring to deal with children

 *     Ericsson           - Created the MacOS version

 *******************************************************************************/

package org.eclipse.cdt.dsf.gdb.service.macos;

import org.eclipse.cdt.dsf.concurrent.DataRequestMonitor;

import org.eclipse.cdt.dsf.mi.service.MIVariableManager;

import org.eclipse.cdt.dsf.mi.service.command.commands.macos.MacOSMIVarUpdate;

import org.eclipse.cdt.dsf.mi.service.command.output.MIVarChange;

import org.eclipse.cdt.dsf.mi.service.command.output.macos.MacOSMIVarUpdateInfo;

import org.eclipse.cdt.dsf.service.DsfServicesTracker;

import org.eclipse.cdt.dsf.service.DsfSession;

/**

 * Manages a list of variable objects as created through GDB/MI commands.

 * 

 * This class is passed expression-meta-commands which have their own cache.

 * Therefore, we don't use the standard MICommandCache in this class.

 * In fact, we can't even use it, because many variableObject MI commands,

 * should not be cached as they alter the state of the back-end.

 * 

 * Design details:

 * ==============

 * 

 * GDB variable object information

 * -------------------------------

 * o Variable objects are recursively hierarchical, where children can be created through 

 *   the parent.

 * o A varObject created with -var-create is a ROOT

 * o A varObject created with -var-list-children, is not a root

 * o Only varObject with no children or varObjects that are pointers can change values 

 *   and therefore 

 *   those objects can be used with -var-assign

 * o After a program stops, a varObject must be 'updated' before used 

 * o Only root varObject can be updated with -var-update, which will trigger all

 *   of the root's descendants to be updated.

 * o Once updated, a varObject need not be updated until the program resumes again;

 *   this is true even after -var-assign is used (because it does an implicit -var-update)

 * o -var-update will return the list of all modifiable descendants of the udpated root which

 *   have changed

 * o -var-update will indicate if a root is out-of-scope (which implies that all

 *   its descendants are out-of-scope)

 * o if a varObject is out-of-scope, another varObject may be valid for the same

 *   expression as the out-of-scope varObject

 * o deleting a varObject will delete all its descendants, therefore, it is only

 *   necessary to delete roots

 * 

 * 

 * Class details

 * -------------

 * - We have an MIVariableObject class which represents a variable object in GDB

 * 

 * - MIVariableObject includes a buffered value for each allowed format.

 * 

 * - We have an MIRootVariableObject class inheriting from MIVariableObject to describe

 *   root varObjects created with -var-create.  Objects created with -var-list-children

 *   are MIVariableObjects only.  The root class will keep track of if the root object 

 *   needs to be updated, if the root object is out-of-scope, and of a list of all 

 *   modifiable descendants of this root.  The list of modifiable descendants is 

 *   accessed using the gdb-given name to allow quick updates from the -var-update 

 *   result (see below.)

 * 

 * - we do not use -var-list-children for arrays, but create them manually

 *  

 * - when the program stops, we should mark all roots as needing to be updated. 

 * To achieve this efficiently, we have a dedicated list of roots that are updated.

 * When the program stops, we go through this list, remove each element and mark it

 * as needing to be updated.

 * 

 * - when a varObject is accessed, if its root must be updated, the var-update

 * command shall be used.  The result of that command will indicate all

 * modifiable descendants that have changed.  We also use --all-values with -var-update

 * to get the new value (in the current format) for each modified descendant.  Using the list of modifiable

 * descendants of the root, we can quickly update the changed ones to invalidate their buffered

 * values and store the new current format value.

 * 

 * - all values of non-modifiable varObjects (except arrays) will be set to {...}

 * without going to the back-end

 * 

 * - requesting the value of an array varObject will trigger the creation of a new

 * varObject for the array's address.  Note that we must still use a variable

 * object and not the command -data-evaluate-expression, because we still need to get

 * the array address in multiple formats.

 * 

 * - we keep an LRU (Least Recently Used) structure of all variable objects.  This LRU

 * will be bounded to a maximum allowed number of variable objects.  Whenever we get an

 * object from the LRU cleanup will be done if the maximum size has been reached.

 * The LRU will not delete a parent varObject until all its children are deleted; this is

 * achieved by touching each of the parents of an object whenever that object is put or get

 *

 * - It may happen that when accessing a varObject we find its root to be

 * out-of-scope.  The expression for which we are trying to access a varObject

 * could still be valid, and therefore we should try to create a new varObject for

 * that expression.  This can happen for example if two methods use the same name

 * for a variable. In the case when we find that a varObject is out-of-scope (when

 * its root is out-of-scope) the following should be done:

 *  - replace the varObject in the LRU with a newly created one in GDB

 *  - if the old object was a root, delete it in GDB.

 *  

 * - In GDB, -var-update will only report a change if -var-evaluate-expression has

 *   changed -- in the current format--.  This means that situations like

 *    double z = 1.2;

 *    z = 1.4;

 *   Will not report a change if the format is anything else than natural.

 *   This is because 1.2 and 1.4 are both printed as 1, 0x1, etc

 *   Since we cache the values of every format, we must know if the value has

 *   change in -any- format, not just the current one.

 *   To solve this, we always keep the display format of variable objects (and their

 *   children) to the natural format; we believe that if the value changes in any

 *   format, it guarantees that it will change in the natural format.

 *   The simplest way to do this is that whenever we change the format

 *   of a variable object, we immediately set it back to natural with a second

 *   var-set-format command.

 *   Note that versions of GDB after 6.7 will allows to issue -var-evaluate-expression

 *   with a specified format, therefore allowing us to never use -var-set-format, and

 *   consequently, to easily keep the display format of all variable objects to natural.

 *   

 *   @since 2.1

 */

public class MacOSGDBVariableManager extends MIVariableManager {

    public MacOSGDBVariableManager(DsfSession session, DsfServicesTracker tracker) {

        super(session, tracker);

    }

	private class MacOSGDBRootVariableObject extends MIRootVariableObject {

		public MacOSGDBRootVariableObject(VariableObjectId id) {

			super(id);

		}

		@Override

		public void update(final DataRequestMonitor<Boolean> rm) {

			if (isOutOfScope()) {

		    	rm.setData(false);

				rm.done();

			} else if (currentState != STATE_READY) {

				// Object is not fully created or is being updated

				// so add RequestMonitor to pending queue

				updatesPending.add(rm);

			} else if (isOutOfDate() == false) {

				rm.setData(false);

				rm.done();

			} else {

				// Object needs to be updated in the back-end

				currentState = STATE_UPDATING;

				// In GDB, var-update will only report a change if -var-evaluate-expression has

				// changed -- in the current format--.  This means that situations like

				// double z = 1.2;

				// z = 1.4;

				// Will not report a change if the format is anything else than natural.

				// This is because 1.2 and 1.4 are both printed as 1, 0x1, etc

				// Since we cache the values of every format, we must know if -any- format has

				// changed, not just the current one.

				// To solve this, we always do an update in the natural format; I am not aware

				// of any case where the natural format would stay the same, but another format

				// would change.  However, since a var-update update all children as well,

			    // we must make sure these children are also in the natural format

				// The simplest way to do this is that whenever we change the format

				// of a variable object, we immediately set it back to natural with a second

				// var-set-format command.  This is done in the getValue() method

				getCommandControl().queueCommand(

						new MacOSMIVarUpdate(getRootToUpdate().getControlDMContext(), getGdbName()),

						new DataRequestMonitor<MacOSMIVarUpdateInfo>(getSession().getExecutor(), rm) {

							@Override

							protected void handleCompleted() {

								currentState = STATE_READY;

								if (isSuccess()) {

									markAsOutOfDate(false);

									MIVarChange[] changes = getData().getMIVarChanges();

									if (changes.length > 0 && changes[0].isInScope() == false) {

										// Object is out-of-scope

										outOfScope = true;

										// We can delete this root in GDB right away.  This is safe, even

									 	// if the root has children, because they are also out-of-scope.

										// We -must- also remove this entry from our LRU.  If we don't

										// we can end-up with a race condition that create this object

										// twice, or have an infinite loop while never re-creating the object.

										// The can happen if we update a child first then we request 

										// the root later,

										removeVariable(getInternalId());

										rm.setData(true);

										rm.done();

									} else {

										// The root object is now up-to-date, we must parse the changes, if any.

										processChanges(changes);

										// We only mark this root as updated in our list if it is in-scope.

										// For out-of-scope object, we don't ever need to re-update them so

										// we don't need to add them to this list.

										rootVariableUpdated(MacOSGDBRootVariableObject.this);

										rm.setData(false);

										rm.done();

									}

									while (updatesPending.size() > 0) {

										DataRequestMonitor<Boolean> pendingRm = updatesPending.poll();

										pendingRm.setData(false);

										pendingRm.done();

									}

								} else {

									// We were not able to update for some reason

									rm.setData(false);

									rm.done();

									while (updatesPending.size() > 0) {

										DataRequestMonitor<Boolean> pendingRm = updatesPending.poll();

										pendingRm.setStatus(getStatus());

										pendingRm.done();

									}

								}

							}

						});

		    }

		}

	}

}

	 * Creates the MI variable manager to be used by this expression service.

	 * Overriding classes may override to provide a custom services tracker. 

	 * 

	 * @since 2.1

	 */

	protected MIVariableManager createMIVariableManager() {

	    return new MIVariableManager(getSession(), getServicesTracker());

	}

	/**

         * @since 2.1

         */

		protected MIVariableObject createChildVariable(VariableObjectId id, MIVariableObject parentObj) {

		    return new MIVariableObject(id, parentObj);

		}

		/**

	 * @since 2.1

    /**

     * @since 2.1

     */

	protected DsfSession getSession() {

	    return fSession;

	}

	/**

     * @since 2.1

     */

	protected ICommandControl getCommandControl() {

	    return fCommandControl;

	}

    /**

     * @since 2.1

     */

	protected MIRootVariableObject createRootVariableObject(VariableObjectId id) {

	    return new MIRootVariableObject(id);

	}

    /**

     * @since 2.1

     */

	protected void rootVariableUpdated(MIRootVariableObject rootObj) {

	    updatedRootList.add(rootObj);

	}

    /**

     * @since 2.1

     */

	protected void removeVariable(VariableObjectId id) {

	    lruVariableList.remove(id);

	}

/*******************************************************************************

 * Copyright (c) 2010 QNX Software Systems and others.

 * All rights reserved. This program and the accompanying materials

 * are made available under the terms of the Eclipse Public License v1.0

 * which accompanies this distribution, and is available at

 * http://www.eclipse.org/legal/epl-v10.html

 *

 * Contributors:

 *     QNX Software Systems - Initial API and implementation

 *     Wind River Systems   - Modified for new DSF Reference Implementation

 *     Ericsson				- Modified for handling of frame contexts

 *******************************************************************************/

package org.eclipse.cdt.dsf.mi.service.command.commands.macos;

import org.eclipse.cdt.dsf.debug.service.command.ICommandControlService.ICommandControlDMContext;

import org.eclipse.cdt.dsf.mi.service.command.commands.MICommand;

import org.eclipse.cdt.dsf.mi.service.command.output.MIOutput;

import org.eclipse.cdt.dsf.mi.service.command.output.macos.MacOSMIVarUpdateInfo;

/**

 * 

 *     -var-update [print-values] {NAME | "*"}

 *

 *  Update the value of the variable object NAME by evaluating its

 *  expression after fetching all the new values from memory or registers.

 *  A `*' causes all existing variable objects to be updated.

 *  If print-values has a value for of 0 or --no-values, print only the names of the variables; 

 *  if print-values is 1 or --all-values, also print their values; 

 *  if it is 2 or --simple-values print the name and value for simple data types and just 

 *  the name for arrays, structures and unions. 

 *  

 *  It seems that for MacOS, we must use the full string for print-values, such as

 *  --all-values.

 * 

 * @since 2.1

 */

public class MacOSMIVarUpdate extends MICommand<MacOSMIVarUpdateInfo> {

	public MacOSMIVarUpdate(ICommandControlDMContext dmc, String name) {

		// Must use --all-values instead of 1 for Mac OS

		super(dmc, "-var-update", new String[] { "--all-values", name }); //$NON-NLS-1$//$NON-NLS-2$

	}

    @Override

    public MacOSMIVarUpdateInfo getResult(MIOutput out) {

        return new MacOSMIVarUpdateInfo(out);

    }

}

/*******************************************************************************

 * Copyright (c) 2010 QNX Software Systems and others.

 * All rights reserved. This program and the accompanying materials

 * are made available under the terms of the Eclipse Public License v1.0

 * which accompanies this distribution, and is available at

 * http://www.eclipse.org/legal/epl-v10.html

 *

 * Contributors:

 *     QNX Software Systems - Initial API and implementation

 *     Ericsson             - Created version for Mac OS

 *******************************************************************************/

package org.eclipse.cdt.dsf.mi.service.command.output.macos;

import java.util.ArrayList;

import java.util.List;

import org.eclipse.cdt.dsf.mi.service.command.output.MIConst;

import org.eclipse.cdt.dsf.mi.service.command.output.MIInfo;

import org.eclipse.cdt.dsf.mi.service.command.output.MIList;

import org.eclipse.cdt.dsf.mi.service.command.output.MIOutput;

import org.eclipse.cdt.dsf.mi.service.command.output.MIResult;

import org.eclipse.cdt.dsf.mi.service.command.output.MIResultRecord;

import org.eclipse.cdt.dsf.mi.service.command.output.MITuple;

import org.eclipse.cdt.dsf.mi.service.command.output.MIValue;

import org.eclipse.cdt.dsf.mi.service.command.output.MIVarChange;

/**

 * GDB/MI var-update for Mac OS.

 * -var-update *

 * ^done,changelist=[varobj={name="var1",in_scope="true",type_changed="false"}],time={.....}

 * 

 * @since 2.1

 */

public class MacOSMIVarUpdateInfo extends MIInfo {

	MIVarChange[] changeList;

	public MacOSMIVarUpdateInfo(MIOutput record) {

		super(record);

        List<MIVarChange> aList = new ArrayList<MIVarChange>();

        if (isDone()) {

            MIOutput out = getMIOutput();

            MIResultRecord rr = out.getMIResultRecord();

            if (rr != null) {

                MIResult[] results =  rr.getMIResults();

                for (int i = 0; i < results.length; i++) {

                    String var = results[i].getVariable();

                    if (var.equals("changelist")) { //$NON-NLS-1$

                        MIValue value = results[i].getMIValue();

                        if (value instanceof MITuple) {

                            parseChangeList((MITuple)value, aList);

                        } else if (value instanceof MIList) {

                            parseChangeList((MIList)value, aList);

                        }

                    }

                }

            }

        }

        changeList = aList.toArray(new MIVarChange[aList.size()]);

	}

	public MIVarChange[] getMIVarChanges() {

		return changeList;

	}

	/**

	 * For MI2 the format is now a MIList.

	 * @param tuple

	 * @param aList

	 */

	void parseChangeList(MIList miList, List<MIVarChange> aList) {

		// The MIList in Apple gdb contains MIResults instead of MIValues. It looks like:

		// ^done,changelist=[varobj={name="var1",in_scope="true",type_changed="false"}],time={.....}

		// Bug 250037

		MIResult[] results = miList.getMIResults();

		for (int i = 0; i < results.length; i++) {

			String var = results[i].getVariable();

			if (var.equals("varobj")) { //$NON-NLS-1$

				MIValue value = results[i].getMIValue();

				if (value instanceof MITuple) {

					parseChangeList((MITuple)value, aList);

				} else if (value instanceof MIList) {

					parseChangeList((MIList)value, aList);

				}

			}

		}

	} 

	void parseChangeList(MITuple tuple, List<MIVarChange> aList) {

		MIResult[] results = tuple.getMIResults();

		MIVarChange change = null;

		for (int i = 0; i < results.length; i++) {

			String var = results[i].getVariable();

			MIValue value = results[i].getMIValue();

			if (value instanceof MITuple) {

				parseChangeList((MITuple)value, aList);

			}

			else

			{

				String str = ""; //$NON-NLS-1$

				if (value instanceof MIConst) {

					str = ((MIConst)value).getString();

				}

				if (var.equals("name")) { //$NON-NLS-1$

					change = new MIVarChange(str);

					aList.add(change);

				} else if (var.equals("value")) { //$NON-NLS-1$

					if (change != null) {

						change.setValue(str);

					}

				} else if (var.equals("in_scope")) { //$NON-NLS-1$

					if (change != null) {

						change.setInScope("true".equals(str)); //$NON-NLS-1$

					}

				} else if (var.equals("type_changed")) { //$NON-NLS-1$

					if (change != null) {

						change.setChanged("true".equals(str)); //$NON-NLS-1$

					}

				}				

			}

		}

	}

}