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pstatck
=======

Ruby backtrace additions by Joe Damato (ice799)
  - http://timetobleed.com
  - http://github.com/ice799
  - [email protected]


How to build pstack
===================
cd /path/to/pstack-source
autconf
./configure
make
sudo make install


How to use ruby backtrace
=========================

After you've built and installed pstrack simply:

pstack-gdb --ruby <pid-of-ruby-process>

Your ruby process will then output a stack trace. For example:

-- 11.04.2009 16:10:25
       from /home/joe/test2.rb:14:in `write'
       from /home/joe/test2.rb:14:in `puts'
       from /home/joe/test2.rb:14:in `ok'
       from /home/joe/test2.rb:16:in `ok'
       from /home/joe/test2.rb:27
       from /home/joe/test2.rb:27:in `times'
       from /home/joe/test2.rb:27


OPTIONAL but STRONGLY RECOMMENDED
=================================

Included with the source is a patch, rb_backtrace.patch, which applies to ruby-1.8.7_p72 to allow
backtraces to be output to a file instead of stdout. This is useful if your application does lots of
logging, or it needs stdout for something else.

To use the patch simply:
cd ruby-187-p72-src/
patch -p1 < /path/to/pstack/rb_backtrace.patch

And then configure, make, and make install ruby like normal.

You can then set the RUBY_BACKTRACE_FILE environment variable to a file, and backtraces wil be
written to that file. For example:

RUBY_BACKTRACE_FILE=/tmp/my-backtrace ruby my-application.rb

The backtrace will be written to /tmp/my-backtrace.PID