| /* This file is part of GDB, the GNU debugger. |
| |
| Copyright 2017-2021 Free Software Foundation, Inc. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #include <stdint.h> |
| |
| struct s |
| { |
| int i; |
| }; |
| |
| static void |
| foo (void) |
| { |
| } |
| |
| int |
| main (void) |
| { |
| struct s s1; |
| struct s *sp1, *sp2; |
| int i = 1234; |
| int *p1, *p2; |
| |
| s1.i = 1234; |
| sp1 = &s1; |
| p1 = &i; |
| /* SP1 and SP2 have different tags, but point to the same address. */ |
| sp2 = (struct s *) ((uintptr_t) sp1 | 0xf000000000000000ULL); |
| p2 = (int *) ((uintptr_t) p1 | 0xf000000000000000ULL); |
| |
| void (*func_ptr) (void) = foo; |
| func_ptr = (void (*) (void)) ((uintptr_t) func_ptr | 0xf000000000000000ULL); |
| sp2->i = 4321; /* breakpoint here. */ |
| |
| for (int i = 0; i < 2; i++) |
| { |
| foo (); |
| (*func_ptr) (); |
| } |
| |
| sp1->i = 8765; |
| sp2->i = 4321; |
| sp1->i = 8765; |
| sp2->i = 4321; |
| *p1 = 1; |
| *p2 = 2; |
| *p1 = 1; |
| *p2 = 2; |
| } |