Autolog: shortcut for set_trace_func to debug ruby via console output, etc

ruby-talk
1

If it helps anyone, I wrote a shortcut for set_trace_func, so next time
you want to just add a line before and after some function you are
trying to debug you can have Ruby temporarily output every line, method,
etc. executed. Also, it lets you define the format, use other loggers,
etc. via a proc/lambda define, since you might not like the default
format. Apologize for posting here if it wouldn't help- maybe you are
using a real debugger.

Example:

In Gemfile add:
gem 'autolog'

Around some part of code add this before:
Autolog.methods
and this after:
Autolog.off

Hope it helps someone who needs a quick tool periodically without all
the time sink of profiling or setting a breakpoint and debugging in a
slow IDE.

···

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2

I'd prefer using a block for robustness.

autolog do
  ...
end

Kind regards

robert

···

On Wed, Oct 17, 2012 at 8:35 PM, Gary Weaver <lists@ruby-forum.com> wrote:

Around some part of code add this before:
Autolog.methods
and this after:
Autolog.off

--
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/

3

How does this compare to stdlib's tracer?

···

On Oct 17, 2012, at 11:35 , Gary Weaver <lists@ruby-forum.com> wrote:

If it helps anyone, I wrote a shortcut for set_trace_func, so next time
you want to just add a line before and after some function you are
trying to debug you can have Ruby temporarily output every line, method,
etc. executed. Also, it lets you define the format, use other loggers,
etc. via a proc/lambda define, since you might not like the default
format. Apologize for posting here if it wouldn't help- maybe you are
using a real debugger.

Example:

In Gemfile add:
gem 'autolog'

Around some part of code add this before:
Autolog.methods
and this after:
Autolog.off

Hope it helps someone who needs a quick tool periodically without all
the time sink of profiling or setting a breakpoint and debugging in a
slow IDE.

GitHub - garysweaver/autolog: Automatically log events like executed lines, methods, class and module definitions, C-language routines, and/or raises in Ruby.

  ##
  # Start tracing
  #
  # === Example
  #
  # Tracer.on
  # # code to trace here
  # Tracer.off
  #
  # You can also pass a block:
  #
  # Tracer.on {
  # # trace everything in this block
  # }

4

Anyone interested in this may also be interested in TracePoint
https://github.com/rubyworks/tracepoint

···

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5

Robert Klemme wrote in post #1080211:

···

On Wed, Oct 17, 2012 at 8:35 PM, Gary Weaver <lists@ruby-forum.com> > wrote:

Around some part of code add this before:
Autolog.methods
and this after:
Autolog.off

I'd prefer using a block for robustness.

autolog do
  ...
end

Kind regards

robert

Done. Added in v0.1.0 and available now in rubygems.org. Added method to
main object and Object. Sound ok? Old syntax still works, too.

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6

Ryan Davis wrote in post #1080212:

In Gemfile add:

GitHub - garysweaver/autolog: Automatically log events like executed lines, methods, class and module definitions, C-language routines, and/or raises in Ruby.

How does this compare to stdlib's tracer?

  ##
  # Start tracing
  #
  # === Example
  #
  # Tracer.on
  # # code to trace here
  # Tracer.off
  #
  # You can also pass a block:
  #
  # Tracer.on {
  # # trace everything in this block
  # }

It is basically like an event-specific version of Tracer.

autolog :methods
autolog :c_calls
autolog :c_returns
autolog :c_calls_and_returns
autolog :class_starts
autolog :class_ends
autolog :classes
autolog :method_calls
autolog :method_returns
autolog :methods
autolog :lines
autolog :raises
autolog :trace
autolog :event :c_return
autolog :events 'raise', 'c-call'
autolog :events :raise, :c_call
autolog :off

Autolog.c_calls
Autolog.c_returns
Autolog.c_calls_and_returns
Autolog.class_starts
Autolog.class_ends
Autolog.classes
Autolog.method_calls
Autolog.method_returns
Autolog.methods
Autolog.lines
Autolog.raises
Autolog.trace
Autolog.event :c_return
Autolog.events 'raise', 'c-call'
Autolog.events :raise, :c_call
Autolog.off

Now takes blocks:

autolog do
  puts "this is something"
  puts "this is something 2"
end

autolog :methods do
  # ...
end

autolog :c_calls_and_returns do
  # ...
end

autolog :lines do
  # ...
end

autolog :events, :line, :c_call do
  # ...
end

Can use in main, Object, or call methods on it.

Could use some help making it better if anyone wants to help.

···

On Oct 17, 2012, at 11:35 , Gary Weaver <lists@ruby-forum.com> wrote:

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7

Jonathan Tran wrote in post #1080250:

Anyone interested in this may also be interested in TracePoint
https://github.com/rubyworks/tracepoint

Thanks! I'll add that link to the autolog readme as an alternative.

···

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