58 lines
1.9 KiB
C
58 lines
1.9 KiB
C
/* Check jmp_buf sizes, alignments and offsets.
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Copyright (C) 2021-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <stddef.h>
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#include <setjmp.h>
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#include <jmp_buf-macros.h>
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#define SJSTR_HELPER(x) #x
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#define SJSTR(x) SJSTR_HELPER(x)
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#define TEST_SIZE(type, size) \
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_Static_assert (sizeof (type) == size, \
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"size of " #type " != " \
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SJSTR (size))
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#define TEST_ALIGN(type, align) \
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_Static_assert (__alignof__ (type) == align , \
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"align of " #type " != " \
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SJSTR (align))
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#define TEST_OFFSET(type, member, offset) \
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_Static_assert (offsetof (type, member) == offset, \
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"offset of " #member " field of " #type " != " \
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SJSTR (offset))
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/* Check if jmp_buf have the expected sizes. */
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TEST_SIZE (jmp_buf, JMP_BUF_SIZE);
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TEST_SIZE (sigjmp_buf, SIGJMP_BUF_SIZE);
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/* Check if jmp_buf have the expected alignments. */
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TEST_ALIGN (jmp_buf, JMP_BUF_ALIGN);
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TEST_ALIGN (sigjmp_buf, SIGJMP_BUF_ALIGN);
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/* Check if internal fields in jmp_buf have the expected offsets. */
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TEST_OFFSET (struct __jmp_buf_tag, __mask_was_saved,
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MASK_WAS_SAVED_OFFSET);
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TEST_OFFSET (struct __jmp_buf_tag, __saved_mask,
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SAVED_MASK_OFFSET);
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int
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main (int argc, char *argv[])
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{
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return 0;
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}
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