Sun Studio tools can be used by developers for the enhancement or creation stage.

Initially, set all functions to some arbitrary color, say gray.
If there is not sufficient space available in per-CPU buffer, a per-buffer drop count is incremented and processing advances to the next probe. Because there are no pointers pointing to the blocks, programs cannot reference them, much less free them.
In this case we will call the analyzer 'trace' and there are no user configurable parameters. Concluding remarks Tracing the execution of a program is a relatively simple task, but it does demonstrate the fact that we can see the exact sequence of instructions being executed.
By default, the principal buffer has a switch buffer policy.