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diff --git a/gcc/auto-obstack.h b/gcc/auto-obstack.h
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+/* RAII wrapper around obstack.
+   Copyright (C) 2024-2025 Free Software Foundation, Inc.
+   Contributed by David Malcolm <dmalcolm@redhat.com>.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC 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
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#ifndef GCC_AUTO_OBSTACK_H
+#define GCC_AUTO_OBSTACK_H
+
+/* RAII wrapper around obstack.  */
+
+struct auto_obstack
+{
+  auto_obstack ()
+  {
+    obstack_init (&m_obstack);
+  }
+
+  ~auto_obstack ()
+  {
+    obstack_free (&m_obstack, NULL);
+  }
+
+  operator obstack & () { return m_obstack; }
+
+  void grow (const void *src, size_t length)
+  {
+    obstack_grow (&m_obstack, src, length);
+  }
+
+  void *object_base () const
+  {
+    return m_obstack.object_base;
+  }
+
+  size_t object_size () const
+  {
+    return obstack_object_size (&m_obstack);
+  }
+
+  obstack m_obstack;
+};
+
+#endif /* GCC_AUTO_OBSTACK_H */