diff -r e375a7921169 -r 57c618273d5c windowing/windowserver/nga/CLIENT/RGC.CPP
--- a/windowing/windowserver/nga/CLIENT/RGC.CPP	Thu Jul 15 20:08:02 2010 +0300
+++ b/windowing/windowserver/nga/CLIENT/RGC.CPP	Thu Aug 19 11:11:18 2010 +0300
@@ -1420,6 +1420,7 @@
 	{
 	iPimpl->WriteAnyPendingStateChanges();
 	TWsGcCmdDrawText printText(aPos,aBuf.Length());
+    __ASSERT_ALWAYS(((aBuf.Size()+sizeof(printText))<=EClientBufferMaxSize),Panic(EW32PanicSizeNotExpected));    
 	WriteTextCommand(&printText,sizeof(printText),aBuf,EWsGcOpDrawText,EWsGcOpDrawTextPtr);
 	}
 
@@ -1452,17 +1453,20 @@
 		if (aHoriz==ELeft && aLeftMrg==0)
 			{
 			TWsGcCmdBoxTextOptimised1 boxTextOpt1(aBox,aBaselineOffset,aBuf.Length());
+			__ASSERT_ALWAYS(((aBuf.Size()+sizeof(boxTextOpt1))<=EClientBufferMaxSize),Panic(EW32PanicSizeNotExpected)); 
 			Write(&boxTextOpt1,sizeof(boxTextOpt1),aBuf.Ptr(),aBuf.Size(),EWsGcOpDrawBoxTextOptimised1);
 			}
 		else
 			{
 			TWsGcCmdBoxTextOptimised2 boxTextOpt2(aBox,aBaselineOffset,aHoriz,aLeftMrg,aBuf.Length());
+			__ASSERT_ALWAYS(((aBuf.Size()+sizeof(boxTextOpt2))<=EClientBufferMaxSize),Panic(EW32PanicSizeNotExpected)); 
 			Write(&boxTextOpt2,sizeof(boxTextOpt2),aBuf.Ptr(),aBuf.Size(),EWsGcOpDrawBoxTextOptimised2);
 			}
 		}
 	else
 		{
 		TWsGcCmdBoxText boxText(aBox,aBaselineOffset,aHoriz,aLeftMrg,aBuf.Length(),iPimpl->iFont->TextWidthInPixels(aBuf));
+		__ASSERT_ALWAYS(((aBuf.Size()+sizeof(boxText))<=EClientBufferMaxSize),Panic(EW32PanicSizeNotExpected)); 
 		WriteTextCommand(&boxText,sizeof(boxText),aBuf,EWsGcOpDrawBoxText,EWsGcOpDrawBoxTextPtr);
 		}
 	}
@@ -1471,6 +1475,7 @@
 	{
 	iPimpl->WriteAnyPendingStateChanges();
 	TWsGcCmdDrawTextInContext printTextInContext(aPos,aBuf.Length(),aParam->iStart,aParam->iEnd);
+	__ASSERT_ALWAYS(((aBuf.Size()+sizeof(printTextInContext))<=EClientBufferMaxSize),Panic(EW32PanicSizeNotExpected)); 
 	WriteTextCommand(&printTextInContext,sizeof(printTextInContext),aBuf,EWsGcOpDrawTextInContext,EWsGcOpDrawTextInContextPtr);
 	return KErrNone;
 	}
@@ -1483,17 +1488,20 @@
 		if (aHoriz==ELeft && aLeftMrg==0)
 			{
 			TWsGcCmdBoxTextInContextOptimised1 boxTextOpt1(aBox,aBaselineOffset,aBuf.Length(),aParam->iStart,aParam->iEnd);
+			__ASSERT_ALWAYS(((aBuf.Size()+sizeof(boxTextOpt1))<=EClientBufferMaxSize),Panic(EW32PanicSizeNotExpected)); 
 			Write(&boxTextOpt1,sizeof(boxTextOpt1),aBuf.Ptr(),aBuf.Size(),EWsGcOpDrawBoxTextInContextOptimised1);
 			}
 		else
 			{
 			TWsGcCmdBoxTextInContextOptimised2 boxTextOpt2(aBox,aBaselineOffset,aHoriz,aLeftMrg,aBuf.Length(),aParam->iStart,aParam->iEnd);
+			__ASSERT_ALWAYS(((aBuf.Size()+sizeof(boxTextOpt2))<=EClientBufferMaxSize),Panic(EW32PanicSizeNotExpected)); 
 			Write(&boxTextOpt2,sizeof(boxTextOpt2),aBuf.Ptr(),aBuf.Size(),EWsGcOpDrawBoxTextInContextOptimised2);
 			}
 		}
 	else
 		{
 		TWsGcCmdBoxTextInContext boxText(aBox,aBaselineOffset,aHoriz,aLeftMrg,aBuf.Length(),iPimpl->iFont->TextWidthInPixels(aBuf),aParam->iStart,aParam->iEnd);
+		__ASSERT_ALWAYS(((aBuf.Size()+sizeof(boxText))<=EClientBufferMaxSize),Panic(EW32PanicSizeNotExpected)); 
 		WriteTextCommand(&boxText,sizeof(boxText),aBuf,EWsGcOpDrawBoxTextInContext,EWsGcOpDrawBoxTextInContextPtr);
 		}
 	return KErrNone;
@@ -1509,6 +1517,7 @@
 	{
 	iPimpl->WriteAnyPendingStateChanges();
 	TWsGcCmdDrawTextVertical printText(aPos,aText.Length(),aUp);
+	__ASSERT_ALWAYS(((aText.Size()+sizeof(printText))<=EClientBufferMaxSize),Panic(EW32PanicSizeNotExpected)); 
 	WriteTextCommand(&printText,sizeof(printText),aText,EWsGcOpDrawTextVertical,EWsGcOpDrawTextVerticalPtr);
 	}
 
@@ -1535,6 +1544,7 @@
 	boxText.margin=aMargin;
 	boxText.length=aText.Length();
 	boxText.width=iPimpl->iFont->TextWidthInPixels(aText);
+	__ASSERT_ALWAYS(((aText.Size()+sizeof(boxText))<=EClientBufferMaxSize),Panic(EW32PanicSizeNotExpected)); 
 	WriteTextCommand(&boxText,sizeof(boxText),aText,EWsGcOpDrawBoxTextVertical,EWsGcOpDrawBoxTextVerticalPtr);
 	}
 
@@ -1542,6 +1552,7 @@
 	{
 	iPimpl->WriteAnyPendingStateChanges();
 	TWsGcCmdDrawTextInContextVertical printText(aPos,aText.Length(),aUp,aParam->iStart,aParam->iEnd);
+	__ASSERT_ALWAYS(((aText.Size()+sizeof(printText))<=EClientBufferMaxSize),Panic(EW32PanicSizeNotExpected)); 
 	WriteTextCommand(&printText,sizeof(printText),aText,EWsGcOpDrawTextInContextVertical,EWsGcOpDrawTextInContextVerticalPtr);
 	return KErrNone;
 	}
@@ -1558,6 +1569,7 @@
 	boxText.width=iPimpl->iFont->TextWidthInPixels(aText);
 	boxText.start = aParam->iStart;
 	boxText.end = aParam->iEnd;
+	__ASSERT_ALWAYS(((aText.Size()+sizeof(boxText))<=EClientBufferMaxSize),Panic(EW32PanicSizeNotExpected)); 
 	WriteTextCommand(&boxText,sizeof(boxText),aText,EWsGcOpDrawBoxTextInContextVertical,EWsGcOpDrawBoxTextInContextVerticalPtr);
 	return KErrNone;
 	}