1 /* 2 * Copyright (C) 2009 Dan Carpenter. 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 * Idea from Michael Stefaniuc and Vincent Béron's earlier WtoA 20 * check. 21 * 22 * Apparently when you are coding WINE, you are not allowed to call 23 * functions that end in capital 'A' from functions that end in 24 * capital 'W' 25 * 26 */ 27 28 #include "smatch.h" 29 30 static int my_id; 31 32 static int in_w = 0; 33 34 static void match_function_def(struct symbol *sym) 35 { 36 char *func = get_function(); 37 int len; 38 39 if (!func) { 40 in_w = 0; 41 return; 42 } 43 len = strlen(func); 44 if (func[len - 1] == 'W' && len > 2 && func[len - 2] != 'A' ) 45 in_w = 1; 46 else 47 in_w = 0; 48 } 49 50 static int allowed_func(const char *fn) 51 { 52 if (!strcmp("lstrcatA", fn)) 53 return 1; 54 if (!strcmp("lstrcpyA", fn)) 55 return 1; 56 if (!strcmp("lstrcpynA", fn)) 57 return 1; 58 if (!strcmp("lstrlenA", fn)) 59 return 1; 60 return 0; 61 } 62 63 static void match_call(struct expression *expr) 64 { 65 char *fn_name; 66 int len; 67 68 if (!in_w) 69 return; 70 71 fn_name = expr_to_var(expr->fn); 72 if (!fn_name) 73 goto free; 74 len = strlen(fn_name); 75 if (fn_name[len - 1] == 'A' && !allowed_func(fn_name)) { 76 sm_warning("WtoA call '%s()'", fn_name); 77 } 78 free: 79 free_string(fn_name); 80 } 81 82 void check_wine_WtoA(int id) 83 { 84 if (option_project != PROJ_WINE) 85 return; 86 87 my_id = id; 88 add_hook(&match_function_def, FUNC_DEF_HOOK); 89 add_hook(&match_call, FUNCTION_CALL_HOOK); 90 } 91