1 files changed, 66 insertions, 0 deletions
diff --git a/nptl_db/td_thr_validate.c b/nptl_db/td_thr_validate.c
new file mode 100644
index 0000000000..76cbad31cf
--- /dev/null
+++ b/nptl_db/td_thr_validate.c
@@ -0,0 +1,66 @@
+/* Validate a thread handle.
+   Copyright (C) 1999, 2001, 2002 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 1999.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include "thread_dbP.h"
+
+
+static td_err_e
+check_thread_list (const td_thrhandle_t *th, psaddr_t head)
+{
+  list_t list;
+  td_err_e result = TD_NOTHR;
+
+  if (ps_pdread (th->th_ta_p->ph, head, &list.next, sizeof (list.next))
+      != PS_OK)
+    return TD_ERR;	/* XXX Other error value?  */
+
+  while (list.next != head)
+    if ((psaddr_t) list.next - offsetof (struct pthread, header.data.list)
+	== th->th_unique)
+      {
+	result = TD_OK;
+	break;
+      }
+    else if (ps_pdread (th->th_ta_p->ph, list.next, &list.next,
+			sizeof (list.next)) != PS_OK)
+      {
+	result = TD_ERR;	/* XXX Other error value?  */
+	break;
+      }
+
+  return result;
+}
+
+
+td_err_e
+td_thr_validate (const td_thrhandle_t *th)
+{
+  LOG ("td_thr_validate");
+
+  /* First check the list with threads using user allocated stacks.  */
+  td_err_e result = check_thread_list (th, th->th_ta_p->stack_user);
+
+  /* If our thread is not on this list search the list with stack
+     using implementation allocated stacks.  */
+  if (result == TD_NOTHR)
+    result = check_thread_list (th, th->th_ta_p->stack_used);
+
+  return result;
+}