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From: Jung-uk Kim <jkim@FreeBSD.org>
To: John Baldwin <jhb@freebsd.org>
Date: Tue, 28 Sep 2010 12:20:09 -0400
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Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org,
	src-committers@freebsd.org, David Xu <davidxu@freebsd.org>
Subject: Re: svn commit: r213241 - in head: include lib/libthr/thread
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On Tuesday 28 September 2010 12:02 pm, Jung-uk Kim wrote:
> On Tuesday 28 September 2010 09:31 am, John Baldwin wrote:
> > On Tuesday, September 28, 2010 12:57:56 am David Xu wrote:
> > > Author: davidxu
> > > Date: Tue Sep 28 04:57:56 2010
> > > New Revision: 213241
> > > URL: http://svn.freebsd.org/changeset/base/213241
> > >
> > > Log:
> > >   In current code, statically initialized and destroyed object
> > > have same null value, the code can not distinguish between
> > > them, to fix the problem, now a destroyed object is assigned to
> > > a non-null value, and it will be rejected by some pthread
> > > functions. PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP is changed to
> > > number 1, so that adaptive mutex can be statically initialized
> > > correctly.
> >
> > Does this fix PR threads/150889 then?
>
> It seems it does.

Unfortunately, it seems to have a regression:

%cat test.c
#include <pthread.h>
#include <stdio.h>

static pthread_cond_t	static_cond = PTHREAD_COND_INITIALIZER;
static pthread_mutex_t	static_mutex = PTHREAD_MUTEX_INITIALIZER;

int
main(void)
{

	// pthread_mutex_lock(&static_mutex);
	printf("%d\n", pthread_cond_wait(&static_cond, &static_mutex));
	pthread_mutex_unlock(&static_mutex);

	return (0);
}
%cc -o test test.c -pthread
%./test
Segmentation fault (core dumped)

pthread_cond_wait(3) had to return EPERM here. :-(

Jung-uk Kim