From: Rich Felker <dalias@aerifal.cx>
To: musl@lists.openwall.com
Subject: Re: TLS (thread-local storage) support
Date: Sat, 6 Oct 2012 16:58:05 -0400 [thread overview]
Message-ID: <20121006205804.GO254@brightrain.aerifal.cx> (raw)
In-Reply-To: <20121006203939.GF24157@port70.net>
On Sat, Oct 06, 2012 at 10:39:39PM +0200, Szabolcs Nagy wrote:
> * Szabolcs Nagy <nsz@port70.net> [2012-10-06 16:33:01 +0200]:
> > should the attached code work with dlopen
> > when compiled as a dso?
> >
> > (i wanted to check if the alignments are ok after a dlopen,
> > but i can see how this usage may not be supported)
> >
> > it seems it dies here in the ctor
>
> a more minimal example:
>
> a.c:
> __thread int xx;
> int *p;
> __attribute__((constructor)) static void init(void)
> {
> p = &xx;
> }
>
> b.c:
> #include <dlfcn.h>
> void *h;
> int main()
> {
> h = dlopen("./a.so", RTLD_LAZY);
> }
>
> compiled as
> musl-gcc -shared -fPIC -g -o a.so a.c
> musl-gcc -g -o b b.c
>
> ../b segfaults in init at p=&xx
Very stupid issue, fixed by commit
92e1cd9b0ba9a8fa86e0346b121e159fb88f99bc:
http://git.musl-libc.org/cgit/musl/commit/?id=92e1cd9b0ba9a8fa86e0346b121e159fb88f99bc
Rich
prev parent reply other threads:[~2012-10-06 20:58 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-04 21:13 Rich Felker
2012-10-04 21:29 ` Daniel Cegiełka
2012-10-04 22:36 ` Rich Felker
2012-10-06 8:17 ` Daniel Cegiełka
2012-10-16 21:27 ` boris brezillon
2012-10-16 21:47 ` boris brezillon
2012-10-16 22:09 ` Szabolcs Nagy
2012-10-16 23:16 ` boris brezillon
2012-10-17 10:37 ` Szabolcs Nagy
2012-10-16 23:29 ` Rich Felker
2012-10-16 22:54 ` Rich Felker
2012-10-16 23:39 ` boris brezillon
2012-10-16 23:48 ` Rich Felker
2012-10-17 0:08 ` boris brezillon
2012-10-17 0:42 ` Rich Felker
2012-10-17 1:03 ` boris brezillon
2012-10-17 1:49 ` boris brezillon
2012-10-17 1:58 ` Rich Felker
2012-10-17 7:48 ` musl
2012-10-19 18:39 ` orc
2012-10-19 18:41 ` Rich Felker
2012-10-05 3:04 ` Rich Felker
2012-10-05 17:27 ` Rich Felker
2012-10-06 14:33 ` Szabolcs Nagy
2012-10-06 20:39 ` Szabolcs Nagy
2012-10-06 20:58 ` Rich Felker [this message]
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