1 /* 2 * Copyright (C) 2014 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 18 /* 19 * The plan here is to save all the possible values store to a given struct 20 * member. 21 * 22 * We will load all the values in to the function_type_val table first then 23 * run a script on that and load all the resulting values into the type_val 24 * table. 25 * 26 * So in this file we want to take the union of everything assigned to the 27 * struct member and insert it into the function_type_val at the end. 28 * 29 * You would think that we could use smatch_modification_hooks.c or 30 * extra_modification_hook() here to get the information here but in the end we 31 * need to code everything again a third time. 32 * 33 */ 34 35 /* 36 * Remember links like: 37 * 38 * foo->void_ptr = some_struct. 39 * 40 * If we get a some_struct pointer from foo->void_ptr then assume it's the same 41 * stuff. 42 */ 43 44 #include "smatch.h" 45 #include "smatch_slist.h" 46 #include "smatch_extra.h" 47 48 static int my_id; 49 50 static void match_assign(struct expression *expr) 51 { 52 struct symbol *type; 53 54 if (!is_void_pointer(expr->left)) 55 return; 56 57 type = get_type(expr->right); 58 if (!type || type->type != SYM_PTR) 59 return; 60 type = get_real_base_type(type); 61 if (!type || type->type != SYM_STRUCT) 62 return; 63 64 sql_insert_data_info(expr->left, TYPE_LINK, type_to_str(type)); 65 } 66 67 void register_type_links(int id) 68 { 69 if (!option_info) 70 return; 71 my_id = id; 72 73 add_hook(&match_assign, ASSIGNMENT_HOOK); 74 } 75