[205142] Refactored use of execution, frame, and expression contexts in the MI implementation.

plugins/org.eclipse.dd.dsf.debug.ui/src/org/eclipse/dd/dsf/debug/ui/sourcelookup/MISourceDisplayAdapter.java

@@ -288,7 +288,7 @@ public class MISourceDisplayAdapter implements ISourceDisplay
                             @Override
                             public void handleOK() {
                                 FramePositioningData clientData = new FramePositioningData();
-                                clientData.fLevel = getData().getLevel();
+                                clientData.fLevel = frameDmc.getLevel();
                                 // Document line numbers are 0-based. While debugger line numbers are 1-based.
                                 clientData.fLine = getData().getLine() - 1;
                                 rm.setData(clientData);

plugins/org.eclipse.dd.dsf.debug.ui/src/org/eclipse/dd/dsf/debug/ui/viewmodel/launch/StackFramesLayoutNode.java

@@ -212,7 +212,7 @@ public class StackFramesLayoutNode extends AbstractDMVMLayoutNode {
         
         // Add frame number (if total number of frames in known)
         if (fCachedOldFrameVMCs != null) {
-            label.append(fCachedOldFrameVMCs.length - dmData.getLevel());
+            label.append(fCachedOldFrameVMCs.length - dmContext.getLevel());
         }
         
         // Add the function name

plugins/org.eclipse.dd.dsf.debug.ui/src/org/eclipse/dd/dsf/debug/ui/viewmodel/variable/VariableLayoutNode.java

@@ -13,6 +13,8 @@ import java.util.ArrayList;
 import java.util.List;
 
 import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IStatus;
+import org.eclipse.core.runtime.Status;
 import org.eclipse.dd.dsf.concurrent.DataRequestMonitor;
 import org.eclipse.dd.dsf.concurrent.DsfExecutor;
 import org.eclipse.dd.dsf.concurrent.MultiRequestMonitor;
@@ -439,19 +441,15 @@ public class VariableLayoutNode extends AbstractExpressionLayoutNode implements
     
     @Override
     protected void getElementForExpressionPart(IChildrenUpdate update, String expressionPartText, DataRequestMonitor<Object> rm) {
-        /*
-         * Create a valid DMC for this entered expression.
-         */
         final IFrameDMContext frameDmc = findDmcInPath(update.getElementPath(), IFrameDMContext.class);
         final IExpressions expressionService = getServicesTracker().getService(IExpressions.class);
 
-        IExpressionDMContext expressionDMC = expressionService.createExpression(frameDmc, expressionPartText);
+        if (frameDmc != null) {
-        
+            IExpressionDMContext expressionDMC = expressionService.createExpression(frameDmc, expressionPartText);
-        /*
+            rm.setData(createVMContext(expressionDMC));
-         *  Now create the valid VMC which wrappers it.
+        } else {
-         */
+            rm.setStatus(new Status(IStatus.ERROR, DsfDebugUIPlugin.PLUGIN_ID, IDsfService.INVALID_HANDLE, "Invalid context", null)); //$NON-NLS-1$
-        IVMContext vmc = createVMContext(expressionDMC);
+        }
-        rm.setData(vmc);
         rm.done();
     }
     

plugins/org.eclipse.dd.dsf.debug/src/org/eclipse/dd/dsf/debug/service/IExpressions.java

@@ -51,7 +51,7 @@ public interface IExpressions extends IFormattedValues {
     /**
      * This is the model data interface that corresponds to IExpressionDMContext.
      */
-    interface IExpressionDMData extends IDMData {
+    public interface IExpressionDMData extends IDMData {
         // These static fields define the possible return values of method getTypeId().
         
         final static String TYPEID_UNKNOWN = "TYPEID_UNKNOWN";
@@ -128,7 +128,7 @@ public interface IExpressions extends IFormattedValues {
      * Event indicating that a given expression is changed. If an expression is changed, it's implied that all
      * the children of that expression are changed too.
      */
-    interface IExpressionChangedDMEvent extends IDMEvent<IExpressionDMContext> {}
+    public interface IExpressionChangedDMEvent extends IDMEvent<IExpressionDMContext> {}
 
     /**
      * Retrieves the expression DM data object for the given expression context(<tt>dmc</tt>).
@@ -154,15 +154,15 @@ public interface IExpressions extends IFormattedValues {
     
     /**
      * Returns the data model context object for the specified expression in the context
-     * specified by <b>ctx</b>.
+     * specified by <b>ctx</b>.   
      * 
      * @param ctx: Context in which to evaluate the expression.  This context could include the
      * PC location, stack frame, thread, or just a symbol context.
      *                
      * @param expression: The expression to evaluate.
      * 
-     * @return  An expression data model context object that must be passed to getModelData() to obtain the
+     * @return  An expression data model context object that must be passed to 
-     *          value of the expression.
+     * getModelData() to obtain the value of the expression. 
      */
     IExpressionDMContext createExpression(IDMContext ctx, String expression);
 

plugins/org.eclipse.dd.dsf.debug/src/org/eclipse/dd/dsf/debug/service/IRunControl.java

@@ -47,22 +47,41 @@ public interface IRunControl extends IDMService
     public enum StateChangeReason { UNKNOWN, USER_REQUEST, STEP, BREAKPOINT, EXCEPTION, CONTAINER, WATCHPOINT, SIGNAL, SHAREDLIB, ERROR };
         
     /**
-     * Events signaling a state changes.
+     * Indicates that the given thread has suspended.
      */
     public interface ISuspendedDMEvent extends IDMEvent<IExecutionDMContext> {
         StateChangeReason getReason();
     }
     
+    /**
+     * Indicates that the given thread has resumed.
+     */
     public interface IResumedDMEvent extends IDMEvent<IExecutionDMContext> {
         StateChangeReason getReason();
     }
 
+    /**
+     * Indicates that the given container has suspended.
+     */
     public interface IContainerSuspendedDMEvent extends ISuspendedDMEvent {
-    	       IExecutionDMContext getTriggeringContext();
+        /**
+         * Returns the context which triggered the resume, which could be 
+         * <code>null</code> if not known. 
+         */
+        IExecutionDMContext getTriggeringContext();
     }
 
+    /**
+     * Indicates that the given container has resumed.
+     */
     public interface IContainerResumedDMEvent extends IResumedDMEvent {
+        /**
+         * Returns the context which triggered the resume, which could be 
+         * <code>null</code> if not known. 
+         */
+        IExecutionDMContext getTriggeringContext();
     }
+    
     /**
      * Indicates that a new execution context (thread) was started.  The DMC 
      * for the event is the container of the new exec context.

plugins/org.eclipse.dd.dsf.debug/src/org/eclipse/dd/dsf/debug/service/IStack.java

@@ -27,13 +27,14 @@ public interface IStack extends IDMService {
      * frame data, this context is used by other services that require a stack
      * frame for evaluation.  
      */
-    public interface IFrameDMContext extends IDMContext {}
+    public interface IFrameDMContext extends IDMContext {
+        int getLevel();
+    }
 
     /**
      * Stack frame information. 
      */
     public interface IFrameDMData extends IDMData {
-        int getLevel();
         IAddress getAddress();
         String getFile();
         String getFunction();