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a738ea1d YQ |
1 | /* This file is part of GDB, the GNU debugger. |
2 | ||
b811d2c2 | 3 | Copyright 2017-2020 Free Software Foundation, Inc. |
a738ea1d YQ |
4 | |
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 3 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
17 | ||
18 | #include <stdint.h> | |
19 | ||
20 | struct s | |
21 | { | |
22 | int i; | |
23 | }; | |
24 | ||
25 | static void | |
26 | foo (void) | |
27 | { | |
28 | } | |
29 | ||
30 | int | |
31 | main (void) | |
32 | { | |
33 | struct s s1; | |
34 | struct s *sp1, *sp2; | |
35 | int i = 1234; | |
36 | int *p1, *p2; | |
37 | ||
38 | s1.i = 1234; | |
39 | sp1 = &s1; | |
40 | p1 = &i; | |
41 | /* SP1 and SP2 have different tags, but point to the same address. */ | |
42 | sp2 = (struct s *) ((uintptr_t) sp1 | 0xf000000000000000ULL); | |
43 | p2 = (int *) ((uintptr_t) p1 | 0xf000000000000000ULL); | |
44 | ||
45 | void (*func_ptr) (void) = foo; | |
46 | func_ptr = (void (*) (void)) ((uintptr_t) func_ptr | 0xf000000000000000ULL); | |
47 | sp2->i = 4321; /* breakpoint here. */ | |
a0de8c21 YQ |
48 | |
49 | for (int i = 0; i < 2; i++) | |
50 | { | |
51 | foo (); | |
52 | (*func_ptr) (); | |
53 | } | |
54 | ||
55 | sp1->i = 8765; | |
f17d9474 | 56 | i = 1; |
a738ea1d | 57 | } |