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 /*
  19  * This basically stores when a pointer is stored as a struct member.
  20  *
  21  */
  22 
  23 #include "smatch.h"
  24 #include "smatch_slist.h"
  25 #include "smatch_extra.h"
  26 
  27 static int my_id;
  28 
  29 static void match_assign(struct expression *expr)
  30 {
  31         struct expression *left, *right;
  32         mtag_t left_tag, right_tag;
  33         int offset;

  34 
  35         if (expr->op != '=')
  36                 return;
  37 
  38         left = strip_expr(expr->left);
  39         right = strip_expr(expr->right);
  40 
  41         if (left->type != EXPR_DEREF)
  42                 return;
  43 
  44         offset = get_member_offset_from_deref(left);
  45         if (offset < 0)
  46                 return;
  47 
  48         if (!get_mtag(left->deref, &left_tag))
  49                 return;
  50         if (!get_mtag(right, &right_tag))
  51                 return;
  52 
  53         sql_insert_mtag_map(right_tag, -offset, left_tag);



  54 }
  55 
  56 void register_mtag_map(int id)
  57 {
  58         my_id = id;
  59 
  60         add_hook(&match_assign, ASSIGNMENT_HOOK);
  61         add_hook(&match_assign, GLOBAL_ASSIGNMENT_HOOK);
  62 }

  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 /*
  19  * This basically stores when a pointer is stored as a struct member.
  20  *
  21  */
  22 
  23 #include "smatch.h"
  24 #include "smatch_slist.h"
  25 #include "smatch_extra.h"
  26 
  27 static int my_id;
  28 
  29 static void match_assign(struct expression *expr)
  30 {
  31         struct expression *left, *right;
  32         mtag_t left_tag;
  33         int offset;
  34         sval_t sval;
  35 
  36         if (expr->op != '=')
  37                 return;
  38 
  39         left = strip_expr(expr->left);
  40         right = strip_expr(expr->right);
  41 
  42         if (!type_is_ptr(get_type(right)))
  43                 return;
  44         if (!get_implied_value(right, &sval))


  45                 return;
  46         if (sval_cmp(sval, valid_ptr_min_sval) < 0 ||
  47             sval_cmp(sval, valid_ptr_max_sval) > 0)
  48                 return;
  49         if (sval.uvalue & MTAG_OFFSET_MASK)
  50                 return;
  51 
  52         if (!expr_to_mtag_offset(left, &left_tag, &offset))
  53                 return;
  54 
  55         sql_insert_mtag_map(sval.uvalue, -offset, left_tag);
  56 }
  57 
  58 void register_mtag_map(int id)
  59 {
  60         my_id = id;
  61 
  62         add_hook(&match_assign, ASSIGNMENT_HOOK);
  63         add_hook(&match_assign, GLOBAL_ASSIGNMENT_HOOK);
  64 }