RealView
DebuggerRealView Debugger uses a red box to highlight the current location of the Program Counter (PC) where this is visible in the selected code view. The PC is only visible in an execution tab, that is, the Src tab or the Dsm tab of the Code window File Editor pane. However, if you force the scope to a different location in your source code then the red box highlights the current context which might not be the true location of the PC.
If you force scope, it is indicated by
in the margin.
If the context relates to forced scope, you can determine the location of the PC in one of the following ways:
Select Show Line at PC from the Code window Debug menu
Select Show Context of PC from the Code window Debug menu