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/* 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;
}
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