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/* An overview of the state machine from varargs.cc
Copyright (C) 2022-2024 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/>. */
/* Keep this in-sync with varargs.cc */
digraph "va_list" {
/* STATES. */
/* Start state. */
start;
/* State for a va_list that is the result of a va_start or va_copy. */
started;
/* State for a va_list that has had va_end called on it. */
ended;
/* TRANSITIONS. */
/* on_va_start: */
start -> started [label="on 'va_start(X, ...)'"];
/* on_va_copy: */
start -> started [label="on 'va_copy(X, ...)'"];
// in check_for_ended_va_list:
ended -> ended [label="on 'va_copy(X, ...)':\nWarn('use after va_end')"];
/* on_va_arg: */
started -> started [label="on 'va_arg(X, ...)'"];
started -> started [label="on 'va_copy(..., X)'"];
// in check_for_ended_va_list:
ended -> ended [label="on 'va_arg(X, ...)':\nWarn('use after va_end')"];
/* on_va_end: */
started -> ended [label="on 'va_end(X)'"];
// in check_for_ended_va_list:
ended -> ended [label="on 'va_end(X)':\nWarn('use after va_end')"];
}
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