1 /* 2 * Copyright (C) 2010 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 #include "smatch.h" 19 #include "smatch_slist.h" 20 21 static int my_id; 22 23 static void must_check(const char *fn, struct expression *expr, void *data) 24 { 25 struct statement *stmt; 26 27 stmt = last_ptr_list((struct ptr_list *)big_statement_stack); 28 if (stmt->type == STMT_EXPRESSION && stmt->expression == expr) 29 sm_warning("unchecked '%s'", fn); 30 } 31 32 static void register_must_check_funcs(void) 33 { 34 struct token *token; 35 const char *func; 36 static char name[256]; 37 38 39 snprintf(name, 256, "%s.must_check_funcs", option_project_str); 40 name[255] = '\0'; 41 token = get_tokens_file(name); 42 if (!token) 43 return; 44 if (token_type(token) != TOKEN_STREAMBEGIN) 45 return; 46 token = token->next; 47 while (token_type(token) != TOKEN_STREAMEND) { 48 if (token_type(token) != TOKEN_IDENT) 49 return; 50 func = show_ident(token->ident); 51 add_function_hook(func, &must_check, NULL); 52 token = token->next; 53 } 54 clear_token_alloc(); 55 } 56 57 void check_return(int id) 58 { 59 my_id = id; 60 register_must_check_funcs(); 61 } 62