1 files changed, 87 insertions, 0 deletions
diff --git a/sysdeps/l4/hurd/pt-thread-halt.c b/sysdeps/l4/hurd/pt-thread-halt.c
new file mode 100644
index 00000000..c6ae76f5
--- /dev/null
+++ b/sysdeps/l4/hurd/pt-thread-halt.c
@@ -0,0 +1,87 @@
+/* Deallocate the kernel thread resources.  L4/Hurd version.
+   Copyright (C) 2007 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 <assert.h>
+#include <errno.h>
+
+#include <pt-internal.h>
+
+/* If we try to deallocate our self, we will end up causing a
+   deadlock.  Thus, when a thread tries to free itself, we add it
+   here.  The next thread to free a thread will free it.  */
+static struct storage saved_object;
+
+void
+__pthread_thread_halt (struct __pthread *thread, int need_dealloc)
+{
+  struct storage exception_handler_stack = thread->exception_handler_stack;
+  thread->exception_handler_stack.addr = ADDR_VOID;
+
+  struct storage object = thread->object;
+  l4_thread_id_t tid = thread->threadid;
+
+  if (need_dealloc)
+    __pthread_dealloc (thread);
+
+  if (! ADDR_IS_VOID (saved_object.addr))
+    {
+      storage_free (saved_object.addr, false);
+      saved_object.cap->type = cap_void;
+      saved_object.addr = ADDR_VOID;
+    }
+
+  /* Stop the exception handler thread.  */
+  l4_word_t dummy = 0;
+  error_t err = rm_thread_exregs (ADDR_VOID, object.addr,
+				  HURD_EXREGS_EXCEPTION_THREAD
+				  | HURD_EXREGS_STOP | HURD_EXREGS_ABORT_IPC,
+				  ADDR_VOID,
+				  0, (struct cap_addr_trans) CAP_ADDR_TRANS_VOID,
+				  ADDR_VOID,
+				  0, 0, 0, 0,
+				  ADDR_VOID, ADDR_VOID,
+				  &dummy, &dummy, &dummy, &dummy);
+  if (err)
+    panic ("Error stopping exception thread.");
+
+  /* Free its stack.  */
+  assert (! ADDR_IS_VOID (exception_handler_stack.addr));
+  storage_free (exception_handler_stack.addr, false);
+  exception_handler_stack.addr = ADDR_VOID;
+
+  if (tid == l4_myself ())
+    /* If we try to storage_free (storage.addr), we will freeze in the
+       middle.  That's no good.  Thus, we add ourself to the pool of
+       available objects.  */
+    saved_object = object;
+  else
+    {
+      storage_free (object.addr, false);
+      object.cap->type = cap_void;
+    }
+
+  if (tid == l4_myself ())
+    {
+      l4_send_timeout (l4_myself (), L4_NEVER);
+      panic ("Failed to stop thread %x.%x!",
+	     l4_thread_no (l4_myself ()), l4_version (l4_myself ()));
+    }
+  else
+    thread_stop (object.addr);
+}