Date: Fri, 26 Mar 2004 13:00:40 -0800 From: Sean McNeil <sean@mcneil.com> To: "Jacques A. Vidrine" <nectar@freebsd.org> Cc: freebsd-current@freebsd.org Subject: Re: nss_ldap broken Message-ID: <1080334840.11426.12.camel@server.mcneil.com> In-Reply-To: <20040326125934.GA68357@madman.celabo.org> References: <1080273717.18231.10.camel@server.mcneil.com> <20040326125934.GA68357@madman.celabo.org>
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OK, I think I understand this problem...
When I have my nsswitch.conf setup as follows, I get seg11s:
passwd: files ldap
group: files ldap
This appears to be an issue with any external nss_*.so.1 module that
uses pthread. It looks to me it is about the following:
/*
* Cleanup
*/
static void
nss_atexit(void)
{
(void)_pthread_rwlock_wrlock(&nss_lock);
VECTOR_FREE(_nsmap, &_nsmapsize, sizeof(*_nsmap),
(vector_free_elem)ns_dbt_free);
VECTOR_FREE(_nsmod, &_nsmodsize, sizeof(*_nsmod),
(vector_free_elem)ns_mod_free);
(void)_pthread_rwlock_unlock(&nss_lock);
}
In my case, the nss_ldap.so.1 module was loaded which pulls in
libpthread. I'm not sure how this works without a libpthred, but it
would appear that unless libpthread.so is loaded everything is OK. But
now, it has been loaded and the rwlock_wrlock() works, but then it has
been unloaded before rwlock_unlock() gets called.
Would using
#include <reentrant.h>
rwlock_wrlock()
rwlock_unlock()
macros fix this?
Cheers,
Sean
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