FFI should not allow calling of rb_* functions from cext
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Key: JRUBY-5766
URL: http://jira.codehaus.org/browse/JRUBY-5766
Project: JRuby
Issue Type: Bug
Affects Versions: JRuby 1.6
Reporter: Wayne Meissner
Assignee: Thomas E Enebo
Fix For: JRuby 1.6.2
Once a C extension is loaded, all the rb_* functions defined by the cext
compatibility layer can be accessed from FFI/DL/win32api, which, whilst
extremely rare, is something people have done. However, calling those
functions like that, will result in a spectacular JVM crash if done on JRuby.
Hence we should probably explicitly disallow access to any function defined by
the cext layer, from FFI (upon which JRuby's ruby/dl and Win32API layers are
also built).
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