Issue #2294 has been updated by kkaempf (Klaus Kämpf).


I can reliably reproduce the bug in my embedded Ruby project (https://github.com/kkaempf/cmpi-bindings) where Ruby (ruby-1.9.3-p194; same for git master) segfaults in mark_locations_array() accessing a memory location *within* ruby_stack_lower_bound and ruby_stack_upper_bound.

I can also verify that applying the ruby_bind_stack patch fixes the issue.
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Feature #2294: [PATCH] ruby_bind_stack() to embed Ruby in coroutine
https://bugs.ruby-lang.org/issues/2294#change-35303

Author: sunaku (Suraj Kurapati)
Status: Assigned
Priority: High
Assignee: ko1 (Koichi Sasada)
Category: core
Target version: 2.0.0


=begin
 Hi,
 
 I am attaching a "ruby_bind_stack.patch" patch file 
 that adds a ruby_bind_stack() function to the Ruby C API.
 
 This function allows me to inform the GC about the stack
 boundaries of the coroutine inside which Ruby is embedded:
 
   void ruby_bind_stack(void *lower, void *upper);
 
 I am also attaching tarballs containing code examples that
 embed Ruby inside two different coroutine environments:
 UNIX System V contexts[1] and libpcl[2] coroutines.
 
 Each tarball has an "output.log" file which contains the
 result of running `script -c ./run.sh output.log` on my
 machine:
 
 Linux yantram 2.6.31-ARCH #1 SMP PREEMPT Tue Oct 13 13:36:23 CEST 2009 i686 Intel(R) Pentium(R) D CPU 3.00GHz GenuineIntel GNU/Linux
 
 The last section in "output.log" corresponds to Ruby @ SVN
 trunk that is patched with the "ruby_bind_stack.patch" 
 patch file that is attached to this issue.
 
 Thanks for your consideration.
 
 [1]: http://www.gnu.org/s/libc/manual/html_node/System-V-contexts.html
 [2]: http://www.xmailserver.org/libpcl.html
 
 See also:
 * http://redmine.ruby-lang.org/issues/show/2258
 * http://redmine.ruby-lang.org/issues/show/2126
=end



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