1 /* 2 * Copyright (C) 2017 Oracle. All rights reserved. 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 /* 19 * This basically stores when a pointer is stored as a struct member. 20 * 21 */ 22 23 #include "smatch.h" 24 #include "smatch_slist.h" 25 #include "smatch_extra.h" 26 27 static int my_id; 28 29 static void match_assign(struct expression *expr) 30 { 31 struct expression *left, *right; 32 mtag_t left_tag, right_tag; 33 int offset; 34 35 if (expr->op != '=') 36 return; 37 38 left = strip_expr(expr->left); 39 right = strip_expr(expr->right); 40 41 if (left->type != EXPR_DEREF) 42 return; 43 44 offset = get_member_offset_from_deref(left); 45 if (offset < 0) 46 return; 47 48 if (!get_mtag(left->deref, &left_tag)) 49 return; 50 if (!get_mtag(right, &right_tag)) 51 return; 52 53 sql_insert_mtag_map(right_tag, -offset, left_tag); 54 } 55 56 void register_mtag_map(int id) 57 { 58 my_id = id; 59 60 add_hook(&match_assign, ASSIGNMENT_HOOK); 61 add_hook(&match_assign, GLOBAL_ASSIGNMENT_HOOK); 62 } 63