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 
  20 static void db_returns_buf_size(struct expression *expr, int param, char *unused, char *math)
  21 {
  22         struct expression *call;
  23         struct symbol *left_type, *right_type;
  24         int bytes;
  25         sval_t sval;

  26 
  27         if (expr->type != EXPR_ASSIGNMENT)
  28                 return;
  29         right_type = get_pointer_type(expr->right);
  30         if (!right_type || type_bits(right_type) != -1)
  31                 return;
  32 
  33         call = strip_expr(expr->right);
  34         left_type = get_pointer_type(expr->left);
  35 
  36         if (!parse_call_math(call, math, &sval) || sval.value == 0)
  37                 return;
  38         if (!left_type)
  39                 return;
  40         bytes = type_bytes(left_type);
  41         if (bytes <= 0)
  42                 return;
  43         if (sval.uvalue >= bytes)
  44                 return;
  45         sm_error("not allocating enough data %d vs %s", bytes, sval_to_str(sval));



  46 }
  47 
  48 void check_allocating_enough_data(int id)
  49 {
  50         select_return_states_hook(BUF_SIZE, &db_returns_buf_size);
  51 }

   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 
  20 static void db_returns_buf_size(struct expression *expr, int param, char *unused, char *math)
  21 {
  22         struct expression *call;
  23         struct symbol *left_type, *right_type;
  24         int bytes;
  25         sval_t sval;
  26         char *str;
  27 
  28         if (expr->type != EXPR_ASSIGNMENT)
  29                 return;
  30         right_type = get_pointer_type(expr->right);
  31         if (!right_type || type_bits(right_type) != -1)
  32                 return;
  33 
  34         call = strip_expr(expr->right);
  35         left_type = get_pointer_type(expr->left);
  36 
  37         if (!parse_call_math(call, math, &sval) || sval.value == 0)
  38                 return;
  39         if (!left_type)
  40                 return;
  41         bytes = type_bytes(left_type);
  42         if (bytes <= 0)
  43                 return;
  44         if (sval.uvalue >= bytes)
  45                 return;
  46 
  47         str = expr_to_str(expr->left);
  48         sm_error("not allocating enough for = '%s' %d vs %s", str, bytes, sval_to_str(sval));
  49         free_string(str);
  50 }
  51 
  52 void check_allocating_enough_data(int id)
  53 {
  54         select_return_states_hook(BUF_SIZE, &db_returns_buf_size);
  55 }