gcc/gimple-array-bounds.h

   1 /* Array bounds checking.
   2    Copyright (C) 2020-2022 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 3, or (at your option)
   9 any later version.
  10
  11 GCC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef GCC_GIMPLE_ARRAY_BOUNDS_H
  21 #define GCC_GIMPLE_ARRAY_BOUNDS_H
  22
  23 #include "pointer-query.h"
  24
  25 class array_bounds_checker
  26 {
  27   friend class check_array_bounds_dom_walker;
  28
  29 public:
  30   array_bounds_checker (struct function *, range_query *);
  31   void check ();
  32
  33 private:
  34   static tree check_array_bounds (tree *tp, int *walk_subtree, void *data);
  35   bool check_array_ref (location_t, tree, gimple *, bool ignore_off_by_one);
  36   bool check_mem_ref (location_t, tree, bool ignore_off_by_one);
  37   void check_addr_expr (location_t, tree, gimple *);
  38   const value_range *get_value_range (const_tree op, gimple *);
  39
  40   /* Current function.  */
  41   struct function *fun;
  42   /* A pointer_query object to store information about pointers and
  43      their targets in.  */
  44   pointer_query m_ptr_qry;
  45   /* Current statement.  */
  46   gimple *m_stmt;
  47 };
  48
  49 #endif // GCC_GIMPLE_ARRAY_BOUNDS_H