From: Zhang Bo <zhangaigh@...>
Date: 2009-03-06T21:43:48+09:00
Subject: Re: debug ruby extension via gdb

thank you very much! I followed your advice. It works!

Another question is how to set breakpoints?

$gdb ruby
$run -Ilib my_test.rb
......
......
what about next? how to set breakpoints for my own program? how to step 
through?
Because I am newbie to ruby. thanks for the help



Alex Fenton wrote:
> Zhang Bo wrote:
>> Hi, I have a question during debugging ruby c++ extension. For example,
>> I created a c++ class who is wrapped through swig. Now I'd like to
>> invoke the class via ruby. Meanwhile I'd like to debug it via gdb. How
>> to step through it?
> 
> 
> Assuming (1) you have successfully compiled your SWIG-based extension to
> a library lib/foo.so, and (2) you have a test ruby script that uses your
> C++-based class called test_foo.rb, run gdb from a command 
> prompt/terminal:
> 
> $> gdb ruby
> 
> ...
> 
> (gdb) run -Ilib test_foo.rb
> 
> That will execute ruby with the arguments "-Ilib test_foo.rb". You can
> then set breakpoints, step through C/C++ statements etc as normal in
> gdb. You can set breakpoints on the C++ method wrappers in your
> extension this way.
> 
> a

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