TotalView Users Guide - CI Wiki

Displaying Thread Objects
that has the lowest index. This might not be the first displayed element if
you used a slice to display the array with reversed indices.
Displaying Fortran Parameters
A Fortran PARAMETER defines a named constant. If your compiler generates
debug information for parameters, they are displayed in the same way as
any other variable. However, some compilers do not generate information
that TotalView can use to determine the value of a PARAMETER. This means
that you must make a few changes to your program if you want to see this
type of information.
If you’re using Fortran 90, you can define variables in a module that you initialize
to the value of these PARAMETER constants; for example:
INCLUDE ‘PARAMS.INC’
MODULE CONSTS
SAVE
INTEGER PI_C = PI
...
END MODULE CONSTS
The PARAMS.INC file contains your parameter definitions. You then use
these parameters to initialize variables in a module. After you compile and
link this module into your program, the values of these parameter variables
are visible.
If you’re using FORTRAN 77, you can achieve the same results if you make
the assignments in a common block and then include the block in main().
You can also use a block data subroutine to access this information.
Displaying Thread Objects
On HP Alpha Tru64 UNIX and IBM AIX systems, TotalView can display information
about mutexes and conditional variables. In addition, TotalView can
display information on read/write locks and data keys on IBM AIX. You can
obtain this information by selecting the Tools > Thread Objects command.
After selecting this command, TotalView displays a window that contains
either two tabs (HP Alpha) or four tabs (IBM). Figure 209 on page 330
shows AIX examples.
Diving on any line in these windows displays a Variable Window that contains
additional information about the item.
Here are some things you should know:
� If you’re displaying data keys, many applications initially set keys to 0
(the NULL pointer value). TotalView doesn’t display a key’s information,
however, until a thread sets a non-NULL value to the key.
TotalView Users Guide: version 8.7 329