TotalView Users Guide - CI Wiki

Displaying Fortran Types
Figure 208: Fortran 90
Pointer Value
achieve the same effect by editing the definition’s type. The following
example shows the type of a deferred shape rank 2 array of real data with
runtime lower bounds of –1 and 2, and upper bounds of 5 and 10:
Type: real(:,:)
Actual Type: real(-1:5,2:10)
Slice: (:,:)
Viewing Fortran 90 Pointer Types
A Fortran 90 pointer type lets you point to scalar or array types.
TotalView implicitly handles slicing operations that set up a pointer or
assumed shape subroutine argument so that indices and values it displays
in a Variable Window are the same as in the Fortran code; for example:
integer, dimension(10), target :: ia
integer, dimension(:), pointer :: ip
do i = 1,10
ia(i) = i
end do
ip => ia(10:1:-2)
After diving through the ip pointer, TotalView displays the windows shown
in Figure 208:
The address displayed is not that of the array’s base. Since the array’s
stride is negative, array elements that follow are at lower absolute
addresses. Consequently, the address displayed is that of the array element
328 Chapter 14: Examining and Changing Data