This makes it easier to read the output, at a cost of these scripts not
terminating if the underlying call sctucture contains loops.
Previously these scripts would not terminate, but at least output the
call tree as they visit each function. This was hard to read, and wasn't
really that useful? If you hit a case with infinite recursion, you can
limit the output size explicitly with -Z.
Note this also drops --tree in stack.py. Since we get more readable
output, this flag is less useful. This simplifies the script a bit.
Christopher Haster
61c51b699a