1 /* 2 * Copyright (C) 2013 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 #include "smatch.h" 19 20 static int my_id; 21 22 static void match_assign(const char *fn, struct expression *expr, void *_size_arg) 23 { 24 int size_arg = PTR_INT(_size_arg); 25 struct expression *left; 26 struct expression *call; 27 struct expression *arg; 28 struct symbol *left_type; 29 struct symbol *size_type; 30 31 left = strip_expr(expr->left); 32 left_type = get_type(left); 33 if (!left_type || left_type->type != SYM_PTR) 34 return; 35 left_type = get_real_base_type(left_type); 36 if (!left_type || left_type->type != SYM_STRUCT) 37 return; 38 39 call = strip_expr(expr->right); 40 arg = get_argument_from_call_expr(call->args, size_arg); 41 if (!arg || arg->type != EXPR_SIZEOF || !arg->cast_type) 42 return; 43 size_type = arg->cast_type; 44 if (size_type->type != SYM_NODE) 45 return; 46 size_type = get_real_base_type(size_type); 47 if (size_type->type != SYM_STRUCT) 48 return; 49 if (strcmp(left_type->ident->name, size_type->ident->name) == 0) 50 return; 51 sm_warning("struct type mismatch '%s vs %s'", left_type->ident->name, 52 size_type->ident->name); 53 54 } 55 56 void check_struct_type(int id) 57 { 58 my_id = id; 59 60 if (option_project == PROJ_KERNEL) { 61 add_function_assign_hook("kmalloc", &match_assign, INT_PTR(0)); 62 add_function_assign_hook("kzalloc", &match_assign, INT_PTR(0)); 63 } 64 } 65