Hi,

I have taken the SystemTracer from SqueakMap and put it on squeaksource.
http://www.squeaksource.com/SystemTracer2.html
SystemTracer is  package originally written by Ted Kaehler.
If you want  more information:
http://wiki.squeak.org/squeak/2315

You can use it on  3.9 and 3.10.

	Mth