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 void match_return(struct expression *ret_value)
  16 {
  17         struct smatch_state *state;
  18         struct range_list *rl;
  19         long long val;
  20
  21         ret_value = strip_expr(ret_value);
  22         if (!ret_value)
  23                 return;
  24
  25         if (ret_value->type == EXPR_CALL) {
  26                 rl = db_return_vals(ret_value);
  27                 if (rl)
  28                         sm_msg("info: return_value %s", show_ranges(rl));
  29                 else
  30                         sm_msg("info: return_value unknown");
  31                 return;
  32         }
  33
  34         if (get_value(ret_value, &val)) {
  35                 sm_msg("info: return_value %lld", val);
  36                 return;
  37         }
  38         state = get_state_expr(SMATCH_EXTRA, ret_value);
  39         if (!state) {
  40                 sm_msg("info: return_value unknown");
  41                 return;
  42         }
  43
  44         sm_msg("info: return_value %s", state->name);
  45 }
  46
  47 void check_db_info(int id)
  48 {
  49         if (!option_info)
  50                 return;
  51         my_id = id;
  52         add_hook(&match_return, RETURN_HOOK);
  53 }