1/*
2 * Copyright (C) 2016 Oracle.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, see http://www.gnu.org/copyleft/gpl.txt
16 *
17 * Copyright 2019 Joyent, Inc.
18 */
19
20/*
21 * Heavily borrowed from check_wine.c: what we're doing here is teaching smatch
22 * that cmn_err(CE_PANIC, ...) is noreturn.
23 */
24
25#include "scope.h"
26#include "smatch.h"
27#include "smatch_extra.h"
28
29#define	CE_PANIC (3)
30
31void match_cmn_err(const char *fn, struct expression *expr,
32			void *unused)
33{
34	struct expression *arg;
35	sval_t sval;
36
37	arg = get_argument_from_call_expr(expr->args, 0);
38	if (!get_implied_value(arg, &sval))
39		return;
40
41	if (sval.value == CE_PANIC)
42		nullify_path();
43}
44
45
46void check_cmn_err(int id)
47{
48	if (option_project != PROJ_ILLUMOS_KERNEL)
49		return;
50
51	add_function_hook("cmn_err", &match_cmn_err, NULL);
52}
53