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The initstate{,_r} interfaces are documented in BSD as needing an aligned
array of 32-bit values, but neither POSIX nor glibc's own documentation
require it to be aligned. glibc's documentation says it "should" be a power
of 2, but not must.
Use memcpy to read and write to `state` to handle such an unaligned
argument.
Co-authored-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Reviewed-by: Florian Weimer <fweimer@redhat.com>
39 lines
1.3 KiB
C
39 lines
1.3 KiB
C
/* Test program for initstate(), initstate_r() for BZ #30584.
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Copyright (C) 2024 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 License as
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published by the Free Software Foundation; either version 2.1 of the
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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; see the file COPYING.LIB. If
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not, see <https://www.gnu.org/licenses/>. */
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#include <stdlib.h>
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#include <time.h>
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static int
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do_test (void)
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{
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struct random_data rand_state = { .state = NULL };
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_Alignas (double) char buf[128 + sizeof (int32_t)];
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/* Test initstate_r with an unaligned `state` array. */
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initstate_r (time (NULL), buf + 1, sizeof buf, &rand_state);
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/* Ditto initstate. */
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initstate (time (NULL), buf + 1, sizeof buf);
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return 0;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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