| 1 | /* Check jmp_buf sizes, alignments and offsets. |
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| 2 | Copyright (C) 2021-2022 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <stddef.h> |
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| 20 | #include <setjmp.h> |
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| 21 | #include <jmp_buf-macros.h> |
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| 22 | |
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| 23 | #define SJSTR_HELPER(x) #x |
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| 24 | #define SJSTR(x) SJSTR_HELPER(x) |
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| 25 | |
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| 26 | #define TEST_SIZE(type, size) \ |
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| 27 | _Static_assert (sizeof (type) == size, \ |
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| 28 | "size of " #type " != " \ |
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| 29 | SJSTR (size)) |
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| 30 | #define TEST_ALIGN(type, align) \ |
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| 31 | _Static_assert (__alignof__ (type) == align , \ |
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| 32 | "align of " #type " != " \ |
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| 33 | SJSTR (align)) |
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| 34 | #define TEST_OFFSET(type, member, offset) \ |
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| 35 | _Static_assert (offsetof (type, member) == offset, \ |
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| 36 | "offset of " #member " field of " #type " != " \ |
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| 37 | SJSTR (offset)) |
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| 38 | |
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| 39 | /* Check if jmp_buf have the expected sizes. */ |
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| 40 | TEST_SIZE (jmp_buf, JMP_BUF_SIZE); |
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| 41 | TEST_SIZE (sigjmp_buf, SIGJMP_BUF_SIZE); |
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| 42 | |
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| 43 | /* Check if jmp_buf have the expected alignments. */ |
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| 44 | TEST_ALIGN (jmp_buf, JMP_BUF_ALIGN); |
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| 45 | TEST_ALIGN (sigjmp_buf, SIGJMP_BUF_ALIGN); |
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| 46 | |
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| 47 | /* Check if internal fields in jmp_buf have the expected offsets. */ |
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| 48 | TEST_OFFSET (struct __jmp_buf_tag, __mask_was_saved, |
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| 49 | MASK_WAS_SAVED_OFFSET); |
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| 50 | TEST_OFFSET (struct __jmp_buf_tag, __saved_mask, |
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| 51 | SAVED_MASK_OFFSET); |
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| 52 | |
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| 53 | int |
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| 54 | main (int argc, char *argv[]) |
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| 55 | { |
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| 56 | return 0; |
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| 57 | } |
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| 58 | |
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