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Stephen Bannasch
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 Posted: Sun Dec 28, 2008 7:15 am Post subject: remote debugging jruby and rails trunk |
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Martin, regarding:
http://blogs.sun.com/martink/entry/remote_debugging_debug_whatever_ruby
great work!
Can I put a debugger statement deep inside my code somewhere and have
the debugger stop there?
This is what I'm doing now:
I'm looking for a regression in trunk jruby that happened in svn r8398.
The result is that some of the rails active record tests crash the
jruby interpreter.
In order to make a simple test I am using the technique described on
your page to run the netbeans debugger on the jruby rake task.
I'm using this release of the ruby ide:
netbeans-hudson-trunk-4693-ruby.zip
Which only has jruby 1.1.4 installed.
I also added the Java cluster but that doesn't come into play here.
I'm running these tests on a patched version of activerecord in rails
trunk which allows me to run the tests using jruby and jdbc:
More details here:
http://kenai.com/projects/activerecord-jdbc/lists/dev/archive/2008-12/message/0
Here's the command I am using to start the debugger:
jruby --debug -S rdebug-ide -p 7000 --stop --
/Users/stephen/dev/ruby/src/jruby.git/bin/rake test_jdbcmysql
TEST=test/cases/serialization_test.rb
I'd like to be able to insert a debugger statement into
serialization_test.rb because while stepping through rake is
interesting (and NB seems to do this very nicely) -- it takes a while.
My real goal here is to step through the rails code for the to_xml
method on an ActiveRecord instance far enough to find out where the
crash is happening. |
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Stephen Bannasch
Posted via mailing list.
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| Posted: Mon Dec 29, 2008 7:52 am Post subject: remote debugging jruby and rails trunk |
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| Quote: | Here's the command I am using to start the debugger:
jruby --debug -S rdebug-ide -p 7000 --stop --
/Users/stephen/dev/ruby/src/jruby.git/bin/rake test_jdbcmysql
TEST=test/cases/serialization_test.rb
I'd like to be able to insert a debugger statement into
serialization_test.rb because while stepping through rake is
interesting (and NB seems to do this very nicely) -- it takes a
while.
My real goal here is to step through the rails code for the to_xml
method on an ActiveRecord instance far enough to find out where the
crash is happening.
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It turns out that It's not as simple as I thought to start tracing a
rake invocation and continue through into the test code it is
executing
This is the method in rake.rb that runs the testing task (line: 1002):
def ruby(*args,&block)
options = (Hash === args.last) ? args.pop : {}
if args.length > 1 then
sh(*([RUBY] + args + [options]), &block)
else
sh("#{RUBY} #{args.first}", options, &block)
end
end
It's using 'sh' to run the task ...
But I can run the test like this instead an get the NetBeans debugger working:
jruby -Ilib:test:test/connections/jdbc_jdbcmysql --debug -S
rdebug-ide -p 7000 --stop -- test/cases/serialization_test.rb
This gets me closer but it appears the way the TestUnit classes work
a breakpoint put in the middle of a test method does not get tripped
-- test/unit/testcase.rb seems to do the actual calling of the method
right after it is defined when the class is evaluated -- but NetBeans
doesn't break on any breakpoints within the test methods themselves.
When the test method in the class is being defined -- when I step
into the statement:
def test_serialize_should_be_reversible
The next code executed is the method: method_added in blankslate.rb:
def method_added(name)
result = blank_slate_method_added(name)
return result if self != Object
BlankSlate.hide(name)
result
end
Stepping into the line:
result = blank_slate_method_added(name)
Just results in the debugger pointing at the subsequent line.
return result if self != Object
Which when stepped into runs the test method outside of the debugger. |
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Martin Krauskopf
Posted via mailing list.
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| Posted: Mon Dec 29, 2008 11:19 am Post subject: remote debugging jruby and rails trunk |
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Stephen Bannasch wrote:
[...]
| Quote: | This is the method in rake.rb that runs the testing task (line: 1002):
def ruby(*args,&block)
options = (Hash === args.last) ? args.pop : {}
if args.length > 1 then
sh(*([RUBY] + args + [options]), &block)
else
sh("#{RUBY} #{args.first}", options, &block)
end
end
It's using 'sh' to run the task ...
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Hi Stephen,
yes, this is known issue, that Rake is forking test execution. Is is
better to debug test in NetBeans directly without using the Rake task
for debugging.
| Quote: | But I can run the test like this instead an get the NetBeans debugger
working:
jruby -Ilib:test:test/connections/jdbc_jdbcmysql --debug -S rdebug-ide
-p 7000 --stop -- test/cases/serialization_test.rb
This gets me closer but it appears the way the TestUnit classes work a
breakpoint put in the middle of a test method does not get tripped --
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I see. Seems to be bug in the backend, since it does not work even with
rdebug (not only with rdebug-ide). But it works with MRI, so I guess
there is a bug in the ruby-debug-base-java implementation. There is a
code handling JRuby core libraries in a special manner, so there might
be problem. I've filed:
https://rubyforge.org/tracker/index.php?func=detail&aid=23372&group_id=3085&atid=11903
Will try to get to it soon.
m. |
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Martin Krauskopf
Posted via mailing list.
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| Posted: Mon Dec 29, 2008 11:35 am Post subject: remote debugging jruby and rails trunk |
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Martin Krauskopf wrote:
| Quote: | Stephen Bannasch wrote:
[...]
| Quote: | This is the method in rake.rb that runs the testing task (line: 1002):
def ruby(*args,&block)
options = (Hash === args.last) ? args.pop : {}
if args.length > 1 then
sh(*([RUBY] + args + [options]), &block)
else
sh("#{RUBY} #{args.first}", options, &block)
end
end
It's using 'sh' to run the task ...
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Hi Stephen,
yes, this is known issue
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PS: which I would like to address someday, likely with some
monkey-patching somewhere ... do not know how yet.
m. |
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