From: Robert Feldt <feldt@...>
Date: 2001-11-17T02:47:25+09:00
Subject: [ruby-talk:25546] Re: Writting a profiler / line coverager / debugger for ruby

On Sat, 17 Nov 2001, Lothar Scholz wrote:

> I just looked in the ruby reference and didn't find something like the
> "trace" callback in python. Is it possible to specify a function that
> will be called after every ruby statement.
> 
$ ri set_trace
------------------------------------------------- Kernel::set_trace_func
     set_trace_func( aProc ) -> aProc
set_trace_func( nil ) -> nil
------------------------------------------------------------------------
     Establishes aProc as the handler for tracing, or disables tracing
     if the parameter is nil. aProc takes up to six parameters: an event
     name, a filename, a line number, an object id, a binding, and the
     name of a class. aProc is invoked whenever an event occurs. Events
     are: c-call (call a C-language routine), c-return (return from a
     C-language routine), call (call a Ruby method), class (start a
     class or module definition), end (finish a class or module
     definition), line (execute code on a new line), raise (raise an
     exception), and return (return from a Ruby method). Tracing is
     disabled within the context of aProc.
     See the example starting on page 271 for more information.

Regards,

/Robert