2 * Copyright (C) 2017 Oracle. All rights reserved.
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
19 * This basically stores when a pointer is stored as a struct member.
24 #include "smatch_slist.h"
25 #include "smatch_extra.h"
29 static void match_assign(struct expression
*expr
)
31 struct expression
*left
, *right
;
39 left
= strip_expr(expr
->left
);
40 right
= strip_expr(expr
->right
);
42 if (!type_is_ptr(get_type(right
)))
44 if (!get_implied_value(right
, &sval
))
46 if (sval_cmp(sval
, valid_ptr_min_sval
) < 0 ||
47 sval_cmp(sval
, valid_ptr_max_sval
) > 0)
49 if (sval
.uvalue
& MTAG_OFFSET_MASK
)
52 if (!expr_to_mtag_offset(left
, &left_tag
, &offset
))
55 sql_insert_mtag_map(sval
.uvalue
, -offset
, left_tag
);
58 void register_mtag_map(int id
)
62 add_hook(&match_assign
, ASSIGNMENT_HOOK
);
63 add_hook(&match_assign
, GLOBAL_ASSIGNMENT_HOOK
);