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sysdeps/generic/tst-stack-align.h
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Paul Eggert
Update copyright dates with scripts/update-copyrights
02 янв 2026, 00:42
02 янв 2026, 00:42
66f3e92
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/* Check stack alignment. Generic version. Copyright (C) 2003-2026 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ #include <stdio.h> #include <stdint.h> int __attribute__ ((weak)) __attribute_optimization_barrier__ is_aligned (void *p, int align) { return (((uintptr_t) p) & (align - 1)) != 0; } #ifndef TEST_STACK_ALIGN_INIT # define TEST_STACK_ALIGN_INIT() 0 #endif #define TEST_STACK_ALIGN() \ ({ \ double _d = 12.0; \ long double _ld = 15.0; \ int _ret = TEST_STACK_ALIGN_INIT (); \ \ printf ("double: %g %p %zu\n", _d, &_d, __alignof (double)); \ _ret += is_aligned (&_d, __alignof (double)); \ \ printf ("ldouble: %Lg %p %zu\n", _ld, &_ld, \ __alignof (long double)); \ _ret += is_aligned (&_ld, __alignof (long double)); \ _ret; \ })