Bug 323552: [registers] Register View content is not stack frame

specific

Change-Id: Ib7922f8487d10e3b9cb5b6dcb255590cc31d2a97
Signed-off-by: Alvaro Sanchez-Leon <alvsan09@gmail.com>
Reviewed-on: https://git.eclipse.org/r/16566
Reviewed-by: Marc Khouzam <marc.khouzam@ericsson.com>
IP-Clean: Marc Khouzam <marc.khouzam@ericsson.com>
Tested-by: Marc Khouzam <marc.khouzam@ericsson.com>

dsf-gdb/org.eclipse.cdt.dsf.gdb/src/org/eclipse/cdt/dsf/mi/service/MIRegisters.java

@@ -9,6 +9,7 @@
  *     Wind River Systems - initial API and implementation
  *     Ericsson			  - Modified for additional features in DSF Reference Implementation
  *     Roland Grunberg (RedHat) - Refresh all registers once one is changed (Bug 400840)
+ *     Alvaro Sanchez-Leon (Ericsson) - Make Registers View specific to a frame (Bug 323552)
  *******************************************************************************/
 package org.eclipse.cdt.dsf.mi.service;
 
@@ -17,6 +18,7 @@ import java.util.Hashtable;
 import java.util.List;
 
 import org.eclipse.cdt.dsf.concurrent.DataRequestMonitor;
+import org.eclipse.cdt.dsf.concurrent.ImmediateDataRequestMonitor;
 import org.eclipse.cdt.dsf.concurrent.ImmediateRequestMonitor;
 import org.eclipse.cdt.dsf.concurrent.RequestMonitor;
 import org.eclipse.cdt.dsf.datamodel.AbstractDMContext;
@@ -29,6 +31,8 @@ import org.eclipse.cdt.dsf.debug.service.IRegisters;
 import org.eclipse.cdt.dsf.debug.service.IRunControl;
 import org.eclipse.cdt.dsf.debug.service.IRunControl.IContainerDMContext;
 import org.eclipse.cdt.dsf.debug.service.IRunControl.StateChangeReason;
+import org.eclipse.cdt.dsf.debug.service.IStack;
+import org.eclipse.cdt.dsf.debug.service.IStack.IFrameDMContext;
 import org.eclipse.cdt.dsf.debug.service.command.BufferedCommandControl;
 import org.eclipse.cdt.dsf.debug.service.command.CommandCache;
 import org.eclipse.cdt.dsf.debug.service.command.ICommandControlService;
@@ -97,6 +101,11 @@ public class MIRegisters extends AbstractDsfService implements IRegisters, ICach
         private int fRegNo;
         private String fRegName;
 
+        /**
+         * An MIRegiserDMC created with no frame context will not be able to resolve the associated register value.
+         * However these instances are useful to provide the register name i.e. needed from the selection of a process,
+         * or a running thread where it is not possible to associate registers to frames and therefore values.
+         */
         public MIRegisterDMC(MIRegisters service, MIRegisterGroupDMC group, int regNo, String regName) {
             super(service.getSession().getId(), 
                     new IDMContext[] { group });
@@ -104,6 +113,7 @@ public class MIRegisters extends AbstractDsfService implements IRegisters, ICach
               fRegName = regName;
         }
 
+        @Deprecated
         public MIRegisterDMC(MIRegisters service, MIRegisterGroupDMC group, IMIExecutionDMContext execDmc, int regNo, String regName) {
             super(service.getSession().getId(), 
                     new IDMContext[] { execDmc, group });
@@ -111,6 +121,22 @@ public class MIRegisters extends AbstractDsfService implements IRegisters, ICach
               fRegName = regName;
         }
 
+		/**
+		 * This Register context is associated to two parent contexts. A stack frame context (IFrameDMContext), and a register group
+		 * context (MIRegisterGroupDMC). When the scenario requires to build a register contexts from the selection of a thread, then the top
+		 * frame shall be resolved and be provided in this constructor.
+		 * 
+		 * The frame context is necessary to resolve the register's data e.g. value
+		 * 
+		 * @since 4.3
+		 */
+        public MIRegisterDMC(MIRegisters service, MIRegisterGroupDMC group, IFrameDMContext frameDmc, int regNo, String regName) {
+            super(service.getSession().getId(), 
+                  new IDMContext[] { frameDmc, group });
+            fRegNo = regNo;
+            fRegName = regName;
+        }
+        
         public int getRegNo() { return fRegNo; }
         public String getName() { return fRegName; }
 
@@ -265,17 +291,17 @@ public class MIRegisters extends AbstractDsfService implements IRegisters, ICach
     public void getRegisterData(IRegisterDMContext regDmc , final DataRequestMonitor<IRegisterDMData> rm) {
         if (regDmc instanceof MIRegisterDMC) {
             final MIRegisterDMC miRegDmc = (MIRegisterDMC)regDmc;
-            IMIExecutionDMContext execDmc = DMContexts.getAncestorOfType(regDmc, IMIExecutionDMContext.class);
+            final IFrameDMContext frameDmc = DMContexts.getAncestorOfType(regDmc, IFrameDMContext.class);
-            // Create register DMC with name if execution DMC is not present.
+            // Create register data with name only e.g. not editable.
-            if(execDmc == null){
+            if(frameDmc == null){
-                rm.setData(new RegisterData(miRegDmc.getName(), BLANK_STRING, false));
+                rm.setData(new RegisterData(null, miRegDmc.getName(), BLANK_STRING, false));
                 rm.done();
                 return;
             }
             
             int[] regnos = {miRegDmc.getRegNo()};
             fRegisterValueCache.execute(
-            	fCommandFactory.createMIDataListRegisterValues(execDmc, MIFormat.HEXADECIMAL, regnos),
+            	fCommandFactory.createMIDataListRegisterValues(frameDmc, MIFormat.HEXADECIMAL, regnos),
                 new DataRequestMonitor<MIDataListRegisterValuesInfo>(getExecutor(), rm) {
                     @Override
                     protected void handleSuccess() {
@@ -303,7 +329,7 @@ public class MIRegisters extends AbstractDsfService implements IRegisters, ICach
                         }
 
                         // Return the new register attributes.
-                        rm.setData(new RegisterData(miRegDmc.getName(), BLANK_STRING, isFloat));
+                        rm.setData(new RegisterData(frameDmc, miRegDmc.getName(), BLANK_STRING, isFloat));
                         rm.done();
                     }
                 });
@@ -314,9 +340,9 @@ public class MIRegisters extends AbstractDsfService implements IRegisters, ICach
     }
     
     private void getRegisterDataValue( final MIRegisterDMC regDmc, final String formatId, final DataRequestMonitor<FormattedValueDMData> rm) {
-        IMIExecutionDMContext miExecDmc = DMContexts.getAncestorOfType(regDmc, IMIExecutionDMContext.class);
+    	IFrameDMContext frameDmc = DMContexts.getAncestorOfType(regDmc, IFrameDMContext.class);
-        if(miExecDmc == null){
+        if(frameDmc == null){
-            // Set value to blank if execution dmc is not present
+            // Set value to blank if frame dmc is not present
             rm.setData( new FormattedValueDMData( BLANK_STRING ) );
             rm.done();
             return;
@@ -333,7 +359,7 @@ public class MIRegisters extends AbstractDsfService implements IRegisters, ICach
         
         int[] regnos = {regDmc.getRegNo()};
         fRegisterValueCache.execute(
-        	fCommandFactory.createMIDataListRegisterValues(miExecDmc, NumberFormat, regnos),
+        	fCommandFactory.createMIDataListRegisterValues(frameDmc, NumberFormat, regnos),
             new DataRequestMonitor<MIDataListRegisterValuesInfo>(getExecutor(), rm) {
                 @Override
                 protected void handleSuccess() {
@@ -362,12 +388,14 @@ public class MIRegisters extends AbstractDsfService implements IRegisters, ICach
         final private String fRegName;
         final private String fRegDesc;
         final private boolean fIsFloat;
+        final private IFrameDMContext fContext;
     	
-    	public RegisterData(String regName, String regDesc, boolean isFloat ) {
+    	public RegisterData(IFrameDMContext context, String regName, String regDesc, boolean isFloat ) {
     		
             fRegName = regName;
             fRegDesc = regDesc;
             fIsFloat = isFloat;
+            fContext = context;
     	}
     	
     	@Override
@@ -375,7 +403,12 @@ public class MIRegisters extends AbstractDsfService implements IRegisters, ICach
     	@Override
         public boolean isReadOnce() { return false; }
     	@Override
-        public boolean isWriteable() { return true; }
+		public boolean isWriteable() {
+    		//The absence of the frame context is likely the result of a selection not specific to a stack frame
+    		//e.g. the selection of a running thread, or the selection of a process.
+    		//So, an instance with no stack frame is not writable
+			return (fContext != null);
+		}
     	@Override
         public boolean isWriteOnce() { return false; }
     	@Override
@@ -397,13 +430,13 @@ public class MIRegisters extends AbstractDsfService implements IRegisters, ICach
     }
     
     // Wraps a list of registers in DMContexts.
-    private MIRegisterDMC[] makeRegisterDMCs(MIRegisterGroupDMC groupDmc, IMIExecutionDMContext execDmc, String[] regNames) {
+    private MIRegisterDMC[] makeRegisterDMCs(MIRegisterGroupDMC groupDmc, IFrameDMContext frameDmc, String[] regNames) {
         List<MIRegisterDMC> regDmcList = new ArrayList<MIRegisters.MIRegisterDMC>( regNames.length );
         int regNo = 0;
         for (String regName : regNames) {
             if(regName != null && regName.length() > 0) {
-            	if(execDmc != null)
+            	if(frameDmc != null)
-            		regDmcList.add(new MIRegisterDMC(this, groupDmc, execDmc, regNo, regName));
+            		regDmcList.add(new MIRegisterDMC(this, groupDmc, frameDmc, regNo, regName));
             	else
             		regDmcList.add(new MIRegisterDMC(this, groupDmc, regNo, regName));
             }
@@ -494,7 +527,6 @@ public class MIRegisters extends AbstractDsfService implements IRegisters, ICach
         rm.done() ;
     }
     
-    
     /*
      * (non-Javadoc)
      * @see org.eclipse.cdt.dsf.debug.service.IRegisters#getRegisters(org.eclipse.cdt.dsf.debug.service.IRegisters.IRegisterGroupDMContext, org.eclipse.cdt.dsf.concurrent.DataRequestMonitor)
@@ -502,47 +534,87 @@ public class MIRegisters extends AbstractDsfService implements IRegisters, ICach
 	@Override
 	public void getRegisters(final IDMContext dmc, final DataRequestMonitor<IRegisterDMContext[]> rm) {
 		final MIRegisterGroupDMC groupDmc = DMContexts.getAncestorOfType(dmc, MIRegisterGroupDMC.class);
-        if ( groupDmc == null ) { 
+		if (groupDmc == null) {
-            rm.setStatus( new Status( IStatus.ERROR , GdbPlugin.PLUGIN_ID , INVALID_HANDLE , "RegisterGroup context not found", null ) ) ;   //$NON-NLS-1$
+			rm.setStatus(new Status(IStatus.ERROR, GdbPlugin.PLUGIN_ID, INVALID_HANDLE,
+					"RegisterGroup context not found", null)); //$NON-NLS-1$
 			rm.done();
 			return;
 		}
 
 		final IContainerDMContext containerDmc = DMContexts.getAncestorOfType(dmc, IContainerDMContext.class);
-        if ( containerDmc == null ) { 
+		if (containerDmc == null) {
-            rm.setStatus( new Status( IStatus.ERROR , GdbPlugin.PLUGIN_ID , INVALID_HANDLE , "Container context not found" , null ) ) ;   //$NON-NLS-1$
+			rm.setStatus(new Status(IStatus.ERROR, GdbPlugin.PLUGIN_ID, INVALID_HANDLE,
+					"Container context not found", null)); //$NON-NLS-1$
 			rm.done();
 			return;
 		}
 
 		// There is only one group and its number must be 0.
-        if ( groupDmc.getGroupNo() == 0 ) {
+		if (groupDmc.getGroupNo() == 0) {
-        	final IMIExecutionDMContext executionDmc = DMContexts.getAncestorOfType(dmc, IMIExecutionDMContext.class);
+			final IFrameDMContext frameDmc = DMContexts.getAncestorOfType(dmc, IFrameDMContext.class);
-        	fRegisterNameCache.execute(
+			if (frameDmc == null) {
-        		fCommandFactory.createMIDataListRegisterNames(containerDmc),
+				// The selection does not provide a specific frame, then resolve the top frame on the current thread
-                new DataRequestMonitor<MIDataListRegisterNamesInfo>(getExecutor(), rm) { 
+				IMIExecutionDMContext execDmc = DMContexts.getAncestorOfType(dmc, IMIExecutionDMContext.class);
+				if (execDmc != null) {
+					IStack stackService = getServicesTracker().getService(IStack.class);
+					if (stackService != null) {
+						stackService.getTopFrame(execDmc, new ImmediateDataRequestMonitor<IStack.IFrameDMContext>(rm) {
+							@Override
+							protected void handleSuccess() {
+								getRegisters(getData(), groupDmc, containerDmc, rm);
+							}
+							
+							@Override
+							protected void handleFailure() {
+								//Unable to resolve top frame on current thread.
+								//The thread could e.g. be in running state, 
+								//we return register instances with no associated execution context
+								//i.e. unable to resolve its associated value.
+								getRegisters(null, groupDmc, containerDmc, rm);
+							}
+						});
+
+						return;
+					}
+				}
+			}
+
+			getRegisters(frameDmc, groupDmc, containerDmc, rm);
+
+		} else {
+			rm.setStatus(new Status(IStatus.ERROR, GdbPlugin.PLUGIN_ID, INTERNAL_ERROR,
+					"Invalid group = " + groupDmc, null)); //$NON-NLS-1$
+			rm.done();
+		}
+	}
+    
+	private void getRegisters(final IFrameDMContext frameDmc, final MIRegisterGroupDMC groupDmc,
+			IContainerDMContext containerDmc, final DataRequestMonitor<IRegisterDMContext[]> rm) {
+
+		fRegisterNameCache.execute(fCommandFactory.createMIDataListRegisterNames(containerDmc),
+				new ImmediateDataRequestMonitor<MIDataListRegisterNamesInfo>(rm) {
 					@Override
 					protected void handleSuccess() {
 						// Retrieve the register names.
-                        String[] regNames = getData().getRegisterNames() ;
+						String[] regNames = getData().getRegisterNames();
 
 						// If the list is empty just return empty handed.
-                        if ( regNames.length == 0 ) {
+						if (regNames.length == 0) {
 							rm.done();
 							return;
 						}
-                        // Create DMContexts for each of the register names.
+
-                        if(executionDmc == null)
+						if (frameDmc == null)
+							// The selection does not provide a frame or thread context,
+							// This can happen e.g. if a container /process is selected
+							// Lets provide the list of register names applicable to the selected process
+							// i.e. instances with only name information which can not resolve a value
 							rm.setData(makeRegisterDMCs(groupDmc, regNames));
 						else
-                        	rm.setData(makeRegisterDMCs(groupDmc, executionDmc, regNames));
+							rm.setData(makeRegisterDMCs(groupDmc, frameDmc, regNames));
 						rm.done();
 					}
 				});
-        } else {
-            rm.setStatus(new Status(IStatus.ERROR , GdbPlugin.PLUGIN_ID , INTERNAL_ERROR , "Invalid group = " + groupDmc , null)); //$NON-NLS-1$
-            rm.done();
-        }
 	}
 	
     /*

dsf-gdb/org.eclipse.cdt.dsf.gdb/src/org/eclipse/cdt/dsf/mi/service/command/CommandFactory.java

@@ -20,6 +20,7 @@
  *     Anton Gorenkov - A preference to use RTTI for variable types determination (Bug 377536)
  *     Vladimir Prus (Mentor Graphics) - Support for -info-os (Bug 360314)
  *     John Dallaway - Support for -data-write-memory-bytes (Bug 387793)
+ *     Alvaro Sanchez-Leon (Ericsson) - Make Registers View specific to a frame (Bug (323552)
  *******************************************************************************/
 
 package org.eclipse.cdt.dsf.mi.service.command;
@@ -429,14 +430,30 @@ public class CommandFactory {
 		return new MIDataListRegisterNames(ctx, regnos);
 	}
 
+	@Deprecated
 	public ICommand<MIDataListRegisterValuesInfo> createMIDataListRegisterValues(IMIExecutionDMContext ctx, int fmt) {
 		return new MIDataListRegisterValues(ctx, fmt);
 	}
 
+	@Deprecated
 	public ICommand<MIDataListRegisterValuesInfo> createMIDataListRegisterValues(IMIExecutionDMContext ctx, int fmt, int [] regnos) {
 		return new MIDataListRegisterValues(ctx, fmt, regnos);
 	}
 	
+	/**
+	 * @since 4.3
+	 */
+	public ICommand<MIDataListRegisterValuesInfo> createMIDataListRegisterValues(IFrameDMContext ctx, int fmt) {
+		return new MIDataListRegisterValues(ctx, fmt);
+	}
+
+	/**
+	 * @since 4.3
+	 */
+	public ICommand<MIDataListRegisterValuesInfo> createMIDataListRegisterValues(IFrameDMContext ctx, int fmt, int [] regnos) {
+		return new MIDataListRegisterValues(ctx, fmt, regnos);
+	}
+
 	public ICommand<MIDataReadMemoryInfo> createMIDataReadMemory(IDMContext ctx, long offset, String address, 
 			int word_format, int word_size, int rows, int cols,
 			Character asChar) {

dsf-gdb/org.eclipse.cdt.dsf.gdb/src/org/eclipse/cdt/dsf/mi/service/command/commands/MIDataListRegisterValues.java

@@ -8,10 +8,13 @@
  * Contributors:
  *     QNX Software Systems - Initial API and implementation
  *     Wind River Systems   - Modified for new DSF Reference Implementation
+ *     Alvaro Sanchez-Leon (Ericsson) - Make Registers View specific to a frame (Bug 323552)
  *******************************************************************************/
 
 package org.eclipse.cdt.dsf.mi.service.command.commands;
 
+import org.eclipse.cdt.dsf.datamodel.IDMContext;
+import org.eclipse.cdt.dsf.debug.service.IStack.IFrameDMContext;
 import org.eclipse.cdt.dsf.debug.service.command.ICommand;
 import org.eclipse.cdt.dsf.debug.service.command.ICommandResult;
 import org.eclipse.cdt.dsf.mi.service.IMIExecutionDMContext;
@@ -35,12 +38,34 @@ public class MIDataListRegisterValues extends MICommand<MIDataListRegisterValues
     int[] regnums;
     int fFmt;
     
+    /**
+	 * @since 4.3
+	 */
+    public MIDataListRegisterValues(IFrameDMContext ctx, int fmt) {
+        this(ctx, fmt, null);
+    }
+
+    /**
+     * @since 4.3
+     */
+    public MIDataListRegisterValues(IFrameDMContext ctx, int fmt, int [] regnos) {
+    	super(ctx, "-data-list-register-values"); //$NON-NLS-1$
+    	init(fmt, regnos);
+    }
+
+    @Deprecated
     public MIDataListRegisterValues(IMIExecutionDMContext ctx, int fmt) {
         this(ctx, fmt, null);
     }
     
+    @Deprecated
     public MIDataListRegisterValues(IMIExecutionDMContext ctx, int fmt, int [] regnos) {
         super(ctx, "-data-list-register-values"); //$NON-NLS-1$
+        init(fmt, regnos);
+    }
+    
+    
+    private void init(int fmt, int [] regnos) {
         regnums = regnos;
 
         String format = "x"; //$NON-NLS-1$
@@ -88,6 +113,15 @@ public class MIDataListRegisterValues extends MICommand<MIDataListRegisterValues
          */
         if (! (command instanceof  MIDataListRegisterValues) ) return null;
         
+        IDMContext context = getContext();
+        
+        /*
+         * Make sure we are coalescing over the same context
+         */
+        if (!command.getContext().equals(context)) {
+        	return null;
+        }
+        
         MIDataListRegisterValues  cmd = (MIDataListRegisterValues) command;
         
         /*
@@ -145,6 +179,14 @@ public class MIDataListRegisterValues extends MICommand<MIDataListRegisterValues
         /*
          *  Now construct a new one. The format we will use is this command.
          */
-        return( new MIDataListRegisterValues((IMIExecutionDMContext)getContext(), fFmt, finalregnums));
+        MIDataListRegisterValues dataValues;
+        if (context instanceof IFrameDMContext) {
+        	dataValues = new MIDataListRegisterValues((IFrameDMContext)context, fFmt, finalregnums);
+        } else {
+        	//Keeping for compatibility with potential users
+        	dataValues = new MIDataListRegisterValues((IMIExecutionDMContext)context, fFmt, finalregnums);        	
+        }
+        
+        return(dataValues);
     }
 }

dsf-gdb/org.eclipse.cdt.tests.dsf.gdb/src/org/eclipse/cdt/tests/dsf/gdb/tests/MIRegistersTest.java

@@ -7,15 +7,19 @@
  * 
  * Contributors:
  *     Ericsson - initial API and implementation
+ *     Alvaro Sanchez-Leon (Ericsson) - Make Registers View specific to a frame (Bug 323552)
  *******************************************************************************/
 package org.eclipse.cdt.tests.dsf.gdb.tests;
 
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotEquals;
+import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
 
 import java.util.LinkedList;
 import java.util.List;
+import java.util.concurrent.ExecutionException;
 
 import org.eclipse.cdt.debug.core.ICDTLaunchConfigurationConstants;
 import org.eclipse.cdt.dsf.concurrent.CountingRequestMonitor;
@@ -46,6 +50,7 @@ import org.eclipse.cdt.dsf.mi.service.IMICommandControl;
 import org.eclipse.cdt.dsf.mi.service.IMIExecutionDMContext;
 import org.eclipse.cdt.dsf.mi.service.IMIProcesses;
 import org.eclipse.cdt.dsf.mi.service.MIProcesses;
+import org.eclipse.cdt.dsf.mi.service.MIRegisters.MIRegisterDMC;
 import org.eclipse.cdt.dsf.mi.service.command.events.MIStoppedEvent;
 import org.eclipse.cdt.dsf.mi.service.command.output.MIDataListRegisterNamesInfo;
 import org.eclipse.cdt.dsf.service.DsfServicesTracker;
@@ -280,6 +285,16 @@ public class MIRegistersTest extends BaseTestCase {
     	final IRegisterDMContext[] regDMCs = getRegisters(frameDmc);
     	List<String> regNames = get_X86_REGS(); 
 
+        IRegisterDMData[] datas = getRegistersData(regDMCs);
+        
+    	for(IRegisterDMData data: datas){
+    		String regName = data.getName();
+   			Assert.assertFalse("GDB does not support register name: " + regName, !regNames.contains(regName));
+    	}
+    }
+    
+    private IRegisterDMData[] getRegistersData(final IRegisterDMContext[] regDMCs) throws InterruptedException, ExecutionException {
+   
         Query<IRegisterDMData[]> query = new Query<IRegisterDMData[]>() {
             @Override
             protected void execute(DataRequestMonitor<IRegisterDMData[]> rm) {
@@ -305,12 +320,7 @@ public class MIRegistersTest extends BaseTestCase {
 
         fSession.getExecutor().execute(query);
         
-        IRegisterDMData[] datas = query.get();
+        return query.get();
-    	
-    	for(IRegisterDMData data: datas){
-    		String regName = data.getName();
-   			Assert.assertFalse("GDB does not support register name: " + regName, !regNames.contains(regName));
-    	}
 	}
 
 	private String getModelDataForRegisterDataValue(IFrameDMContext frameDmc, String format, int regNo) throws Throwable {
@@ -548,4 +558,75 @@ public class MIRegistersTest extends BaseTestCase {
     	assertTrue("Failed writing register. New value should have been " + regValue + "instead of " + val, regValue.equals(val));
     }
     
+    /**
+     * This test validates retrieval of different values for the same register used on different frames
+     */
+    @Test
+	public void frameSpecificValues() throws Throwable {
+		// Step to a multi-level stack level to be able to test different stack frames
+		SyncUtil.runToLocation("PrintHello");
+		MIStoppedEvent stoppedEvent = SyncUtil.step(StepType.STEP_OVER);
+		int depth = SyncUtil.getStackDepth(stoppedEvent.getDMContext());
+
+		// validate expected stack depth
+		assertEquals(4, depth);
+
+		// Resolve the register name of the stack pointer
+		String sp_name = resolveStackPointerName();
+		assertNotNull(sp_name);
+
+		// Get the stack pointer value for frame0
+		IFrameDMContext frame0 = SyncUtil.getStackFrame(stoppedEvent.getDMContext(), 0);
+		IRegisterDMContext[] registers_f0 = getRegisters(frame0);
+		MIRegisterDMC sp_reg_f0 = (MIRegisterDMC) findStackPointerRegister(sp_name, registers_f0);
+		assertNotNull(sp_reg_f0);
+		String sp_f0_str = getModelDataForRegisterDataValue(frame0, IFormattedValues.HEX_FORMAT, sp_reg_f0.getRegNo());
+	
+		// Get the stack pointer value for frame1
+		IFrameDMContext frame1 = SyncUtil.getStackFrame(stoppedEvent.getDMContext(), 1);
+		IRegisterDMContext[] registers_f1 = getRegisters(frame1);
+		MIRegisterDMC sp_reg_f1 = (MIRegisterDMC) findStackPointerRegister(sp_name, registers_f1);
+		assertNotNull(sp_reg_f1);
+		String sp_f1_str = getModelDataForRegisterDataValue(frame1, IFormattedValues.HEX_FORMAT, sp_reg_f1.getRegNo());
+		
+		//The stack pointer's are not expected to be the same among frames
+		assertNotEquals("Stack pointers shall be different among frames", sp_f0_str, sp_f1_str);
+	}
+
+	private IRegisterDMContext findStackPointerRegister(String sp_name, IRegisterDMContext[] registerDMCs) throws InterruptedException, ExecutionException {
+		IRegisterDMData[] registersData = getRegistersData(registerDMCs);
+		for (int i = 0; i < registersData.length; i++) {
+			IRegisterDMData registerData = registersData[i];
+			
+			if (registerData.getName().equals(sp_name)) {
+				return registerDMCs[i];
+			}
+		}
+		
+		return null;
+	}
+
+	private String resolveStackPointerName() throws Throwable {
+		List<String> regNames = get_X86_REGS();
+		
+		// for 64 bits
+		String sp_name = "rsp";
+		if (regNames.contains(sp_name)) {
+			return sp_name;
+		}
+		
+		// for 32 bits
+		sp_name = "esp";
+		if (regNames.contains(sp_name)) {
+			return sp_name;
+		}
+		
+		// for 16 bits
+		sp_name = "sp";
+		if (regNames.contains(sp_name)) {
+			return sp_name;
+		}
+		
+		return null;
+	}
 }

dsf/org.eclipse.cdt.dsf.ui/src/org/eclipse/cdt/dsf/debug/ui/viewmodel/register/RegisterVMNode.java

@@ -7,6 +7,7 @@
  * 
  * Contributors:
  *     Wind River Systems - initial API and implementation
+ *     Alvaro Sanchez-Leon (Ericsson) - Make Registers View specific to a frame (Bug 323552)
  *******************************************************************************/
 package org.eclipse.cdt.dsf.debug.ui.viewmodel.register;
 
@@ -29,6 +30,7 @@ import org.eclipse.cdt.dsf.debug.service.IRegisters.IRegisterDMContext;
 import org.eclipse.cdt.dsf.debug.service.IRegisters.IRegisterDMData;
 import org.eclipse.cdt.dsf.debug.service.IRegisters.IRegisterGroupDMData;
 import org.eclipse.cdt.dsf.debug.service.IRegisters.IRegistersChangedDMEvent;
+import org.eclipse.cdt.dsf.debug.service.IRunControl.IResumedDMEvent;
 import org.eclipse.cdt.dsf.debug.service.IRunControl.ISuspendedDMEvent;
 import org.eclipse.cdt.dsf.debug.ui.viewmodel.ErrorLabelForeground;
 import org.eclipse.cdt.dsf.debug.ui.viewmodel.ErrorLabelText;
@@ -672,6 +674,7 @@ public class RegisterVMNode extends AbstractExpressionVMNode
     @Override
     public int getDeltaFlags(Object e) {
         if ( e instanceof ISuspendedDMEvent || 
+             e instanceof IResumedDMEvent || 
              e instanceof IMemoryChangedEvent ||
              e instanceof IRegistersChangedDMEvent ||
              (e instanceof PropertyChangeEvent &&
@@ -697,6 +700,7 @@ public class RegisterVMNode extends AbstractExpressionVMNode
         // The following events can affect any register's values, 
         // refresh the contents of the parent element (i.e. all the registers). 
         if ( e instanceof ISuspendedDMEvent || 
+             e instanceof IResumedDMEvent || 
              e instanceof IMemoryChangedEvent ||
              e instanceof IRegistersChangedDMEvent ||
              (e instanceof PropertyChangeEvent &&

dsf/org.eclipse.cdt.dsf.ui/src/org/eclipse/cdt/dsf/debug/ui/viewmodel/register/RegisterVMProvider.java

@@ -7,6 +7,7 @@
  * 
  * Contributors:
  *     Wind River Systems - initial API and implementation
+ *     Alvaro Sanchez-Leon (Ericsson) - Make Registers View specific to a frame (Bug 323552)
  *******************************************************************************/
 package org.eclipse.cdt.dsf.debug.ui.viewmodel.register;
 
@@ -19,6 +20,7 @@ import org.eclipse.cdt.dsf.debug.service.ICachingService;
 import org.eclipse.cdt.dsf.debug.service.IRegisters;
 import org.eclipse.cdt.dsf.debug.service.IRunControl.IExecutionDMContext;
 import org.eclipse.cdt.dsf.debug.service.IRunControl.ISuspendedDMEvent;
+import org.eclipse.cdt.dsf.debug.service.IStack.IFrameDMContext;
 import org.eclipse.cdt.dsf.debug.ui.DsfDebugUITools;
 import org.eclipse.cdt.dsf.debug.ui.IDsfDebugUIConstants;
 import org.eclipse.cdt.dsf.debug.ui.viewmodel.update.BreakpointHitUpdatePolicy;
@@ -169,23 +171,25 @@ public class RegisterVMProvider extends AbstractDMVMProvider
     @Override
 	public void update(IViewerInputUpdate update) {
 		/*
-    	 * Use the execution context in the current selection as the input provider.
+		 * Using the frame context as first alternative to display register values per stack frame
-    	 * This insures that the REGISTER VIEW will not collapse and expand on stepping or on
+		 * if not available e.g. user selected a thread, the execution context is used instead
-    	 * re-selection in the DEBUG VIEW.  Currently the register content is not stack frame
-    	 * specific. If it were to become so then we would need to modify this policy.
 		 */
     	Object element = update.getElement();
     	if (element instanceof IDMVMContext) {
         	IDMContext ctx = ((IDMVMContext) element).getDMContext();
 
-        	IExecutionDMContext execDmc = DMContexts.getAncestorOfType(ctx, IExecutionDMContext.class);
+			IDMContext selDmc = DMContexts.getAncestorOfType(ctx, IFrameDMContext.class);
-    		if ( execDmc != null ) {
+			if (selDmc == null) {
+				selDmc = DMContexts.getAncestorOfType(ctx, IExecutionDMContext.class);
+			}
+        	
+    		if ( selDmc != null ) {
     			/*
     			 * This tells the Flexible Hierarchy that element driving this view has not changed
     			 * and there is no need to redraw the view. Since this is a somewhat fake VMContext
     			 * we provide our Root Layout node as the representative VM node.
     			 */
-    			update.setInputElement(new ViewInputElement(RegisterVMProvider.this.getRootVMNode(), execDmc));
+    			update.setInputElement(new ViewInputElement(RegisterVMProvider.this.getRootVMNode(), selDmc));
     			update.done();
     			return;
     		}