Bug 673161 - RFE: add systemtap static probes to Ruby
Summary: RFE: add systemtap static probes to Ruby
Alias: None
Product: Fedora
Classification: Fedora
Component: ruby
Version: rawhide
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
Assignee: Vít Ondruch
QA Contact: Fedora Extras Quality Assurance
Depends On:
Blocks: 673162
TreeView+ depends on / blocked
Reported: 2011-01-27 15:35 UTC by William Cohen
Modified: 2013-03-22 15:45 UTC (History)
6 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
: 673162 (view as bug list)
Last Closed: 2013-03-22 15:45:33 UTC
Type: ---

Attachments (Terms of Use)
systemtap support for ruby (5.68 KB, patch)
2011-01-27 16:06 UTC, Mo Morsi
no flags Details | Diff

Description William Cohen 2011-01-27 15:35:06 UTC
A number of packages have included runtime support for systemtap in Fedora such as the JVM and Python. SystemTap makes use of the probe points added for DTRACE. There are similar patches for Ruby to provide SystemTap probes for Ruby 1.9.2:


Older patches for Ruby 1.8.7 are available (https://gist.github.com/86895 and http://joyeur.com/2007/05/07/dtrace-for-ruby-is-available/)

An preliminary srpm based off of RHEL6 Ruby using the older 1.8.7 patches has been built and used successfully with trace Ruby program execution:


It would be very nice to have the instrumentation points available in Ruby.

Comment 1 Mo Morsi 2011-01-27 16:06:12 UTC
Created attachment 475631 [details]
systemtap support for ruby

I'm not claiming this as I'm not sure I can commit the time at the moment, but I have spent some cycles on my own time porting the patch adding systemtap support to python in Fedora to Ruby

Its not complete, there are some things that still need to be done/fixed and there might be better places to put the probes (I hadn't noticed the dtrace/ruby patch before, thanks for that), but it could be used as a base for further development.

Hope this helps

Comment 2 Mamoru TASAKA 2011-01-27 16:38:28 UTC
First of all,
- under what license are the patches for systemtap support available?
- and where is the "current" patch for systemtap support for ruby 1.8.7.x?

Comment 3 William Cohen 2011-01-27 17:03:50 UTC
-The license isn't clear for the Ruby 1.8.7 patch that is in the prototype ruby source rpm. However, there is a 1.9.2 patch in the ruby svn:


-The prototype rpm is available 1.8.7 patch:

If Ruby in Fedora is going to be rebased to 1.9.2 (https://bugzilla.redhat.com/show_bug.cgi?id=667603) then could just use that patch in ruby svn. Otherwise back port the patch in Ruby svn to 1.8.7.

Comment 4 William Cohen 2011-03-18 13:50:03 UTC
Additional info.

Issue for adding dtrace support ruby:

Issue for adding various tracing hooks to ruby:

There were three patches to put dtrace support into ruby january 2010:


However, shortly afterwards the patches were reverted with:


Comment 5 Vít Ondruch 2011-05-19 08:27:15 UTC
The original patch for 1.8.5 and 1.8.6 si GPLv2, therefore also the 1.8.7 patch should be GPLv2 IMO.


Comment 6 Vít Ondruch 2011-05-19 08:29:04 UTC
Or better Ruby or GPLv2

Comment 7 Vít Ondruch 2013-01-08 14:46:08 UTC
There are going to be DTrace probes in Ruby 2.0 [1]. They are already implemented in ruby-2.0 branch of Ruby's dist-git [2].

[1] https://bugs.ruby-lang.org/issues/2565
[2] http://pkgs.fedoraproject.org/cgit/ruby.git/tree/?h=ruby-2.0

Comment 8 Vít Ondruch 2013-03-22 15:45:33 UTC
Since F19, there is integrated systemtap support [1].

William, since the probes differs from the RHEL ones, would you mind to update your wikipage [2]?

[1] http://pkgs.fedoraproject.org/cgit/ruby.git/tree/libruby.stp
[2] http://sourceware.org/systemtap/wiki/RubyMarker

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