1> dbg:tracer().
{ok,<0.34.0>}
2> dbg:p(all, c).
{ok,[{matched,nonode@nohost,26}]}
3> dbg:tpl(test, g, dbg:fun2ms(fun(_) -> exception_trace() end)).
{ok,[{matched,nonode@nohost,1},{saved,x}]}
4> dbg:stop(), dbg:stop_clear().
原文：http://www.cnblogs.com/yanwei-wang/p/4655064.html