1*1f5207b7SJohn Levon /* 2*1f5207b7SJohn Levon * Copyright (C) 2014 Oracle. 3*1f5207b7SJohn Levon * 4*1f5207b7SJohn Levon * This program is free software; you can redistribute it and/or 5*1f5207b7SJohn Levon * modify it under the terms of the GNU General Public License 6*1f5207b7SJohn Levon * as published by the Free Software Foundation; either version 2 7*1f5207b7SJohn Levon * of the License, or (at your option) any later version. 8*1f5207b7SJohn Levon * 9*1f5207b7SJohn Levon * This program is distributed in the hope that it will be useful, 10*1f5207b7SJohn Levon * but WITHOUT ANY WARRANTY; without even the implied warranty of 11*1f5207b7SJohn Levon * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12*1f5207b7SJohn Levon * GNU General Public License for more details. 13*1f5207b7SJohn Levon * 14*1f5207b7SJohn Levon * You should have received a copy of the GNU General Public License 15*1f5207b7SJohn Levon * along with this program; if not, see http://www.gnu.org/copyleft/gpl.txt 16*1f5207b7SJohn Levon */ 17*1f5207b7SJohn Levon 18*1f5207b7SJohn Levon /* 19*1f5207b7SJohn Levon * The plan here is to save all the possible values store to a given struct 20*1f5207b7SJohn Levon * member. 21*1f5207b7SJohn Levon * 22*1f5207b7SJohn Levon * We will load all the values in to the function_type_val table first then 23*1f5207b7SJohn Levon * run a script on that and load all the resulting values into the type_val 24*1f5207b7SJohn Levon * table. 25*1f5207b7SJohn Levon * 26*1f5207b7SJohn Levon * So in this file we want to take the union of everything assigned to the 27*1f5207b7SJohn Levon * struct member and insert it into the function_type_val at the end. 28*1f5207b7SJohn Levon * 29*1f5207b7SJohn Levon * You would think that we could use smatch_modification_hooks.c or 30*1f5207b7SJohn Levon * extra_modification_hook() here to get the information here but in the end we 31*1f5207b7SJohn Levon * need to code everything again a third time. 32*1f5207b7SJohn Levon * 33*1f5207b7SJohn Levon */ 34*1f5207b7SJohn Levon 35*1f5207b7SJohn Levon /* 36*1f5207b7SJohn Levon * Remember links like: 37*1f5207b7SJohn Levon * 38*1f5207b7SJohn Levon * foo->void_ptr = some_struct. 39*1f5207b7SJohn Levon * 40*1f5207b7SJohn Levon * If we get a some_struct pointer from foo->void_ptr then assume it's the same 41*1f5207b7SJohn Levon * stuff. 42*1f5207b7SJohn Levon */ 43*1f5207b7SJohn Levon 44*1f5207b7SJohn Levon #include "smatch.h" 45*1f5207b7SJohn Levon #include "smatch_slist.h" 46*1f5207b7SJohn Levon #include "smatch_extra.h" 47*1f5207b7SJohn Levon 48*1f5207b7SJohn Levon static int my_id; 49*1f5207b7SJohn Levon match_assign(struct expression * expr)50*1f5207b7SJohn Levonstatic void match_assign(struct expression *expr) 51*1f5207b7SJohn Levon { 52*1f5207b7SJohn Levon struct symbol *type; 53*1f5207b7SJohn Levon 54*1f5207b7SJohn Levon if (!is_void_pointer(expr->left)) 55*1f5207b7SJohn Levon return; 56*1f5207b7SJohn Levon 57*1f5207b7SJohn Levon type = get_type(expr->right); 58*1f5207b7SJohn Levon if (!type || type->type != SYM_PTR) 59*1f5207b7SJohn Levon return; 60*1f5207b7SJohn Levon type = get_real_base_type(type); 61*1f5207b7SJohn Levon if (!type || type->type != SYM_STRUCT) 62*1f5207b7SJohn Levon return; 63*1f5207b7SJohn Levon 64*1f5207b7SJohn Levon sql_insert_data_info(expr->left, TYPE_LINK, type_to_str(type)); 65*1f5207b7SJohn Levon } 66*1f5207b7SJohn Levon register_type_links(int id)67*1f5207b7SJohn Levonvoid register_type_links(int id) 68*1f5207b7SJohn Levon { 69*1f5207b7SJohn Levon if (!option_info) 70*1f5207b7SJohn Levon return; 71*1f5207b7SJohn Levon my_id = id; 72*1f5207b7SJohn Levon 73*1f5207b7SJohn Levon add_hook(&match_assign, ASSIGNMENT_HOOK); 74*1f5207b7SJohn Levon } 75