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From: Jaakko Heinonen <jh@FreeBSD.org>
Date: Thu, 3 Mar 2011 17:12:24 +0000 (UTC)
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X-FreeBSD-CVS-Branch: RELENG_8
Subject: cvs commit: src/libexec/rtld-elf rtld.c
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jh          2011-03-03 17:12:24 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_8)
    libexec/rtld-elf     rtld.c 
  Log:
  SVN rev 219237 on 2011-03-03 17:12:24Z by jh
  
  MFC r216489:
  
  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
  
  Revision    Changes    Path
  1.139.2.12  +38 -16    src/libexec/rtld-elf/rtld.c