For a starting point, see http://netzhansa.blogspot.no/2012/02/traces-of-awesomeness.html http://netzhansa.blogspot.no/2012/02/traces-of-awesomeness.h... , wher

For a starting point, see http://netzhansa.blogspot.no/2012/02/traces-of-awesomeness.html http://netzhansa.blogspot.no/2012/02/traces-of-awesomeness.h... , where Hans Hübner teaches how to do dynamically selective tracing with SBCL.