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From: Jaakko Heinonen <jh@FreeBSD.org>
Date: Thu, 16 Dec 2010 16:56:44 +0000 (UTC)
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Subject: cvs commit: src/libexec/rtld-elf rtld.c
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jh          2010-12-16 16:56:44 UTC

  FreeBSD src repository

  Modified files:
    libexec/rtld-elf     rtld.c 
  Log:
  SVN rev 216489 on 2010-12-16 16:56:44Z by jh
  
  If dlclose() is called recursively from a _fini() function, the inner
  dlclose() call may unload the object of the outer call prematurely
  because objects are unreferenced before _fini() calls.
  
  Fix this by unreferencing objects after calling objlist_call_fini() in
  dlclose(). Therefore objlist_call_fini() now calls the fini function if
  the reference count of an object is 1. In addition we must restart the
  list_fini traversal after every _fini() call because another dlclose()
  call might have modified the reference counts.
  
  Add an XXX comment to objlist_call_fini() about possible race with
  dlopen().
  
  PR:             133246, 149464
  Reviewed by:    kan, kib
  
  Revision  Changes    Path
  1.161     +38 -16    src/libexec/rtld-elf/rtld.c