Date: Fri, 11 Jun 1999 01:35:37 -0700 (PDT) From: pavel_roskin@geocities.com To: freebsd-gnats-submit@freebsd.org Subject: bin/12129: Process cannot call external functions after dlclose(self) Message-ID: <19990611083537.11F2F14EF0@hub.freebsd.org>
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>Number: 12129
>Category: bin
>Synopsis: Process cannot call external functions after dlclose(self)
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Fri Jun 11 01:40:01 PDT 1999
>Closed-Date:
>Last-Modified:
>Originator: Pavel Roskin
>Release: 3.2-RELEASE
>Organization:
Contex Ltd., Saint Petersburg, Russia
>Environment:
FreeBSD liverpool.typhoon.spb.ru 3.2-RELEASE FreeBSD 3.2-RELEASE #0: Tue May 18
04:05:08 GMT 1999 jkh@cathair:/usr/src/sys/compile/GENERIC i386
>Description:
Executable compiled with -Wl,--export-dynamic can call dlopen(0,RTLD_LAZY)
and access its own symbols. However, dlclose(handle) where handle is
returned by that dlopen() makes the process behave incorrectly.
Notably, the process cannot call external functions anymore,
not even exit().
>How-To-Repeat:
#include <dlfcn.h>
#include <stdio.h>
int
main ()
{
>Fix:
void* handle;
handle = dlopen(0, RTLD_LAZY);
dlclose(handle);
return 0;
}
Or just run "make check" in ftp://ftp.gnu.org/pub/gnu/libtool/libtool-1.3.2.tar.gz
>Release-Note:
>Audit-Trail:
>Unformatted:
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