Date: Thu, 16 Dec 2010 16:56:44 +0000 (UTC) From: Jaakko Heinonen <jh@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/libexec/rtld-elf rtld.c Message-ID: <201012161656.oBGGuwCp026269@repoman.freebsd.org>
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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
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