check_db_info.c

   1 /*
   2  * smatch/check_db_info.c
   3  *
   4  * Copyright (C) 2010 Dan Carpenter.
   5  *
   6  * Licensed under the Open Software License version 1.1
   7  *
   8  */
   9
  10 #include "smatch.h"
  11 #include "smatch_extra.h"
  12
  13 static int my_id;
  14
  15 static struct range_list *return_ranges;
  16
  17 static void add_return_range(struct range_list *rl)
  18 {
  19         rl = cast_rl(cur_func_return_type(), rl);
  20         if (!return_ranges) {
  21                 return_ranges = rl;
  22                 return;
  23         }
  24         return_ranges = rl_union(return_ranges, rl);
  25 }
  26
  27 static void match_return(struct expression *ret_value)
  28 {
  29         struct range_list *rl;
  30         struct symbol *type = cur_func_return_type();
  31
  32         if (__inline_fn)
  33                 return;
  34         ret_value = strip_expr(ret_value);
  35         if (!ret_value)
  36                 return;
  37
  38         if (get_implied_rl(ret_value, &rl))
  39                 add_return_range(rl);
  40         else
  41                 add_return_range(alloc_whole_rl(type));
  42 }
  43
  44 static void match_end_func(struct symbol *sym)
  45 {
  46         if (__inline_fn)
  47                 return;
  48         if (!return_ranges)
  49                 return;
  50         sql_insert_return_values(show_rl(return_ranges));
  51         return_ranges = NULL;
  52 }
  53
  54 void check_db_info(int id)
  55 {
  56         my_id = id;
  57         add_hook(&match_return, RETURN_HOOK);
  58         add_hook(&match_end_func, END_FUNC_HOOK);
  59 }