1 /* An overview of the state machine from varargs.cc
2 Copyright (C) 2022-2024 Free Software Foundation, Inc.
3 Contributed by David Malcolm <dmalcolm@redhat.com>.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 GCC is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
21 /* Keep this in-sync with varargs.cc */
30 /* State for a va_list that is the result of a va_start or va_copy. */
33 /* State for a va_list that has had va_end called on it. */
39 start -> started [label="on 'va_start(X, ...)'"];
42 start -> started [label="on 'va_copy(X, ...)'"];
43 // in check_for_ended_va_list:
44 ended -> ended [label="on 'va_copy(X, ...)':\nWarn('use after va_end')"];
47 started -> started [label="on 'va_arg(X, ...)'"];
48 started -> started [label="on 'va_copy(..., X)'"];
49 // in check_for_ended_va_list:
50 ended -> ended [label="on 'va_arg(X, ...)':\nWarn('use after va_end')"];
53 started -> ended [label="on 'va_end(X)'"];
54 // in check_for_ended_va_list:
55 ended -> ended [label="on 'va_end(X)':\nWarn('use after va_end')"];