From: Suraj Kurapati <skurapat@...>
Date: 2006-02-18T01:13:29+09:00
Subject: SystemStackError when rb_define_module_function() * 3

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Hello,

I'm getting a "test.rb:46: stack level too deep (SystemStackError)"
when defining three or more functions for a module, which is created
& given to Ruby via the Ruby C API. The test.rb (actually
"trunk/src/samp/test.rb") file and the remaining source code is
available in a Subversion repository here:

svn checkout -r21 svn://rubyforge.org/var/svn/ruby-vpi
- -or-
<http://rubyforge.org/plugins/scmsvn/viewcvs.php/?root=ruby-vpi&pathrev=21>


In particular, the error occurs when I register a third module
function with Ruby C API inside line 25 of the file
"trunk/src/RVPI.cin":

// register the VPI module
RVPI__rModuleDef = rb_define_module("VPI");

rb_define_module_function(  // first func
  RVPI__rModuleDef
  , "relay_verilog"
  , RVPI_rb_relay_verilog
  , 0
);

rb_define_module_function(  // second func
  RVPI__rModuleDef
  , "register_task"
  , RVPI_rb_register_task
  , 1
);

rb_define_module_function( // third func
  RVPI__rModuleDef
  , "handle_by_name"
  , RVPI_rb_handle_by_name
  , 2
); // FIXME: causes "stack level too deep (SystemStackError)"


I originally thought the problem was with the third module function
(named "RVPI_rb_handle_by_name") that I was trying to register. But
this was not the case, because the SystemStackError occurred even
when I registered the first module function under a different name:

// register the VPI module
RVPI__rModuleDef = rb_define_module("VPI");

rb_define_module_function(  // first func
  RVPI__rModuleDef
  , "relay_verilog"
  , RVPI_rb_relay_verilog
  , 0
);

rb_define_module_function(  // second func
  RVPI__rModuleDef
  , "register_task"
  , RVPI_rb_register_task
  , 1
);

rb_define_module_function(  // first func with different name
  RVPI__rModuleDef
  , "foo"
  , RVPI_rb_relay_verilog
  , 0
);


What am I doing wrong?

Thank you.
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