states, stree: change break_stack to stree
[smatch.git] / check_memset.c
blob75413b86b9319b20b9987754b1eacaf81957d802
1 /*
2 * Copyright (C) 2011 Dan Carpenter.
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.
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.
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
18 #include "smatch.h"
20 static int my_id;
22 static void match_memset(const char *fn, struct expression *expr, void *data)
24 struct expression *arg_expr;
25 sval_t sval;
27 arg_expr = get_argument_from_call_expr(expr->args, 2);
29 if (arg_expr->type != EXPR_VALUE)
30 return;
31 if (!get_value(arg_expr, &sval))
32 return;
33 if (sval.value != 0)
34 return;
35 sm_msg("error: calling memset(x, y, 0);");
38 void check_memset(int id)
40 my_id = id;
41 add_function_hook("memset", &match_memset, NULL);
42 add_function_hook("__builtin_memset", &match_memset, NULL);