From owner-freebsd-hackers@FreeBSD.ORG  Wed Dec  3 02:17:05 2003
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id F339016A4CE
	for <freebsd-hackers@freebsd.org>;
	Wed,  3 Dec 2003 02:17:04 -0800 (PST)
Received: from oasis.uptsoft.com (oasis.uptsoft.com [217.20.165.41])
	by mx1.FreeBSD.org (Postfix) with ESMTP id EF7C443F3F
	for <freebsd-hackers@freebsd.org>;
	Wed,  3 Dec 2003 02:17:01 -0800 (PST)
	(envelope-from devnull@oasis.uptsoft.com)
Received: (from devnull@localhost)
	by oasis.uptsoft.com (8.11.6/linuxconf) id hB3AGxU00944
	for freebsd-hackers@freebsd.org; Wed, 3 Dec 2003 12:16:59 +0200
Date: Wed, 3 Dec 2003 12:16:59 +0200
From: Sergey Lyubka <devnull@uptsoft.com>
To: freebsd-hackers@freebsd.org
Message-ID: <20031203121658.A822@oasis.uptsoft.com>
Mail-Followup-To: freebsd-hackers@freebsd.org
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
User-Agent: Mutt/1.2.5.1i
X-OS: FreeBSD 4.5-STABLE
Subject: dlopen() and -pg flag
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 03 Dec 2003 10:17:05 -0000

Below is a little snipper that tries to dlopen(argv[1]).
It works fine until it is compiled with profiling support, -pg flag.

Compiled with -pg, dlopen() reports "Service unavailable".

How to fix that ?

-sergey



#include <dlfcn.h>
#include <stdlib.h>
#include <stdio.h>

int main(int argc, char *argv[])
{
	void *handle, *sym;

	if (argc > 1) {
		handle = dlopen(argv[1], RTLD_NOW);
		if (handle == NULL) {
			fprintf(stderr, "dlopen: %s\n", dlerror());
		} else {
			fprintf(stderr, "handle: %p\n", handle);
			if (argc > 2) {
				sym = dlsym(handle, argv[2]);
				fprintf(stderr, "%s: %p\n", argv[2], sym);
			}
		}
	}

	return (EXIT_SUCCESS);
}