Date: Thu, 15 Sep 2011 11:01:30 +0300 From: Kostik Belousov <kostikbel@gmail.com> To: "Thinker K.F. Li" <thinker@codemud.net> Cc: freebsd-hackers@freebsd.org Subject: Re: Thread-local storage issue Message-ID: <20110915080130.GL17489@deviant.kiev.zoral.com.ua> In-Reply-To: <20110915.105047.104045404.thinker@eeebox.branda.to> References: <20110915.105047.104045404.thinker@eeebox.branda.to>
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--WdUsZMUkvvqwUt1b Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Sep 15, 2011 at 10:50:47AM +0800, Thinker K.F. Li wrote: > Hi Guys, >=20 > I was in trouble for an issue of TLS implementation of FreeBSD. It is > an issue of ld-elf.so actually. If I have a thread-local variable in > program, the value of the variable is not consistent after an > dlopen(). For example, >=20 > __thread int var =3D 50; >=20 > void modify() { > var =3D 100; > } >=20 > void show() { > printf("%d\n", var); > } >=20 > int main(int argc, char * const *argv) { > dlopen(...); > modify(); > show(); > } >=20 > If it is compiled with -fpic, it would print "50" while "100" is > expected. (-fpic is required for shared objects) >=20 > I have send-pr a patch as >=20 > http://www.freebsd.org/cgi/query-pr.cgi?pr=3D160721 >=20 > I need someone to review it. I already sent the request to re@ to commit the change. Thanks for the submission. --WdUsZMUkvvqwUt1b Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (FreeBSD) iEYEARECAAYFAk5xsNoACgkQC3+MBN1Mb4gIXwCgjjkVsLmsEvbZsNikN8eerka/ EToAnixRF91XSkb9K78g0qq/COy3EUKw =VHws -----END PGP SIGNATURE----- --WdUsZMUkvvqwUt1b--
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