From: Sean Chittenden <sean@...>
Date: 2002-09-14T05:32:19+09:00
Subject: Re: Dump each method called to stdout?

> I've got a script that loops through a bunch of stuff and somewhere
> in the middle (not the same place each time) it's hanging.
> 
> Is there a quick way to hook each method call so I can output the
> method name to stdout so I can see the last method called before the
> hang?  Debugging won't work well -- I'd have to step through every
> line numerous times until it just happened to hang wherever it does,
> and I have no idea if the debugging environ would affect it.

What I've done before is set counters that only print goo every few
minutes + a stack trace.

count = 0
while true

  # do stuff
  begin
    if count == 100
      count = 0
      raise "Uga"
  rescue => e
    print e.backtrace.join("\n")
  end

  # do more stuff...

  count += 1
end


There are other ways of doing things, but I've found that to be a
decent way of figuring out what's going on in tight loops... you might
want to toss in counter that doesn't ever get reset and a time index
but I think you get the concept.  -sc

-- 
Sean Chittenden