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