1 /*
2  * Copyright (C) 2010 Dan Carpenter.
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 
18 #include "smatch.h"
19 #include "smatch_slist.h"
20 
21 static int my_id;
22 static int returned;
23 
match_return(struct expression * ret_value)24 static void match_return(struct expression *ret_value)
25 {
26 	if (__inline_fn)
27 		return;
28 	if (is_reachable())
29 		returned = 1;
30 }
31 
match_func_end(struct symbol * sym)32 static void match_func_end(struct symbol *sym)
33 {
34 	if (__inline_fn)
35 		return;
36 	if (out_of_memory() || taking_too_long())
37 		return;
38 	if (!is_reachable() && !returned)
39 		sm_info("info: add to no_return_funcs");
40 	returned = 0;
41 }
42 
check_no_return(int id)43 void check_no_return(int id)
44 {
45 	if (!option_info)
46 		return;
47 	my_id = id;
48 	add_hook(&match_return, RETURN_HOOK);
49 	add_hook(&match_func_end, END_FUNC_HOOK);
50 }
51