Date: Mon, 6 Nov 2000 07:31:57 -0800 (PST) From: John Polstra <jdp@polstra.com> To: current@freebsd.org Cc: sobomax@freebsd.org Subject: Re: Problem with dlopen()/dlsym() after recent crt* changes Message-ID: <200011061531.eA6FVv821977@vashon.polstra.com> In-Reply-To: <3A066572.2CF3D7BC@FreeBSD.org> References: <3A066572.2CF3D7BC@FreeBSD.org>
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In article <3A066572.2CF3D7BC@FreeBSD.org>,
Maxim Sobolev <sobomax@FreeBSD.ORG> wrote:
> After the crt changes the following piece of code, which worked previously,
> gives a 'host: dlopen() failed: ./module.so: Undefined symbol
> "__register_frame_info' error message (yeah, I know that it's better to check
> handle == NULL first, but it's the way some apps work).
>
> handle = dlopen("./module.so", RTLD_LAZY);
> if ((error = dlerror()) != NULL)
> {
> errx(1, "dlopen() failed: %s", error);
> /* Not reached */
> }
I personally think this code is broken. It's analogous to checking
errno without first testing a system call's return value.
> The full sources of this testcase can be found at:
> http://people.freebsd.org/~sobomax/dlbug.tar.gz .
OK, thanks. I'll take a look at it as soon as I can -- hopefully
tonight. If I can come up with a reasonable work-around, I'll do so.
John
--
John Polstra jdp@polstra.com
John D. Polstra & Co., Inc. Seattle, Washington USA
"Disappointment is a good sign of basic intelligence." -- Chögyam Trungpa
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