smatch_project.c

   1 /*
   2  * sparse/smatch_project.c
   3  *
   4  * Copyright (C) 2010 Dan Carpenter.
   5  *
   6  * Licensed under the Open Software License version 1.1
   7  *
   8  */
   9
  10 /*
  11  * This file is only for very generic stuff, that is reusable
  12  * between projects.  If you need something special create a
  13  * check_your_project.c.
  14  *
  15  */
  16
  17 #include "smatch.h"
  18 #include "smatch_extra.h"
  19
  20 static void register_no_return_funcs(void)
  21 {
  22         struct token *token;
  23         const char *func;
  24         char name[256];
  25
  26         if (option_project == PROJ_NONE)
  27                 strcpy(name, "no_return_funcs");
  28         else
  29                 snprintf(name, 256, "%s.no_return_funcs", option_project_str);
  30
  31         token = get_tokens_file(name);
  32         if (!token)
  33                 return;
  34         if (token_type(token) != TOKEN_STREAMBEGIN)
  35                 return;
  36         token = token->next;
  37         while (token_type(token) != TOKEN_STREAMEND) {
  38                 if (token_type(token) != TOKEN_IDENT)
  39                         return;
  40                 func = show_ident(token->ident);
  41                 add_function_hook(func, &__match_nullify_path_hook, NULL);
  42                 token = token->next;
  43         }
  44         clear_token_alloc();
  45 }
  46
  47 static void return_implies(struct expression *call_expr, int param, char *key, char *value)
  48 {
  49         struct range_list_sval *rl;
  50         struct expression *arg;
  51
  52         if (call_expr->type == EXPR_ASSIGNMENT)
  53                 call_expr = strip_expr(call_expr->right);
  54
  55         arg = get_argument_from_call_expr(call_expr->args, param);
  56         get_value_ranges_sval(value, &rl);
  57         set_extra_expr_nomod(arg, alloc_estate_range_list_sval(rl));
  58 }
  59
  60 static void register_ignored_macros(void)
  61 {
  62         struct token *token;
  63         char *macro;
  64         char name[256];
  65
  66         if (option_project == PROJ_NONE)
  67                 strcpy(name, "ignored_macros");
  68         else
  69                 snprintf(name, 256, "%s.ignored_macros", option_project_str);
  70
  71         token = get_tokens_file(name);
  72         if (!token)
  73                 return;
  74         if (token_type(token) != TOKEN_STREAMBEGIN)
  75                 return;
  76         token = token->next;
  77         while (token_type(token) != TOKEN_STREAMEND) {
  78                 if (token_type(token) != TOKEN_IDENT)
  79                         return;
  80                 macro = alloc_string(show_ident(token->ident));
  81                 add_ptr_list(&__ignored_macros, macro);
  82                 token = token->next;
  83         }
  84         clear_token_alloc();
  85 }
  86
  87 void register_project(int id)
  88 {
  89         register_no_return_funcs();
  90         register_ignored_macros();
  91         add_db_return_implies_callback(RANGE_CAP, &return_implies);
  92 }