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-rw-r--r--nptl_db/td_thr_validate.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/nptl_db/td_thr_validate.c b/nptl_db/td_thr_validate.c
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index 0000000000..76cbad31cf
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+++ b/nptl_db/td_thr_validate.c
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+/* 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;
+}