Temporary patch from Thomas Schwinge to fix libpthread bugs.

---
 libpthread/sysdeps/mach/hurd/pt-init-specific.c |   29 ++++++++++++++++++++++++
 libpthread/sysdeps/mach/pt-thread-dealloc.c     |    2 +
 libpthread/sysdeps/mach/pt-thread-halt.c        |   19 ++++++++++++++-
 3 files changed, 48 insertions(+), 2 deletions(-)

--- a/libpthread/sysdeps/mach/pt-thread-dealloc.c
+++ b/libpthread/sysdeps/mach/pt-thread-dealloc.c
@@ -38,4 +38,6 @@ __pthread_thread_dealloc (struct __pthre
      assert.  */
   __mach_port_destroy (__mach_task_self (),
 		       thread->wakeupmsg.msgh_remote_port);
+
+  thread->have_kernel_resources = 0;
 }
--- a/libpthread/sysdeps/mach/pt-thread-halt.c
+++ b/libpthread/sysdeps/mach/pt-thread-halt.c
@@ -32,6 +32,21 @@
 void
 __pthread_thread_halt (struct __pthread *thread)
 {
-  error_t err = __thread_terminate (thread->kernel_thread);
-  assert_perror (err);
+  if (thread->have_kernel_resources)
+    {
+      if (thread == _pthread_self ())
+	{
+	  while (1)
+	    {
+	      error_t err = __thread_suspend (thread->kernel_thread);
+	      assert_perror (err);
+	      assert (! "Failed to suspend self.");
+	    }
+	}
+      else
+	{
+	  error_t err = __thread_terminate (thread->kernel_thread);
+	  assert_perror (err);
+	}
+    }
 }
--- /dev/null
+++ b/libpthread/sysdeps/mach/hurd/pt-init-specific.c
@@ -0,0 +1,29 @@
+/* __pthread_init_specific.  Mach version.
+   Copyright (C) 2002, 2009 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <pthread.h>
+#include <pt-internal.h>
+
+error_t
+__pthread_init_specific (struct __pthread *thread)
+{
+  thread->thread_specifics = 0;
+  thread->have_kernel_resources = 0;
+  return 0;
+}