Moving Through the Call Stack

Moving up through the call stack means heading toward the main procedure. Moving down through the call stack means heading toward the current stopping point in the program.

Moving through the call stack changes the current function and repositions the source window at this function. It also affects the scope that Prism uses for interpreting the names of variables you specify in expressions and commands.

Prism provides these methods for moving through the call stack:

• From the menu bar - Choose Up or Down from the Debug menu. Up moves up one level in the call stack; Down moves down one level. These selections are available by default in the tear-off region.

• From the command window - Issue the up command on the command line to move up one level. If you specify an integer as an argument, you move up that number of levels. Issue the down command to move down one level; specifying an integer moves down that number of levels.

• From the Where window - If the Where window is displayed, clicking on a function in it changes the stack level to make that function current.