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8250f4c6d0
* tests/test-calloc-gnu.c (eight): New function. (main): Don't skip test; use eight() instead.
56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
/* Test of calloc function.
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Copyright (C) 2010-2017 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 <config.h>
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#include <stdlib.h>
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/* Return 8.
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Usual compilers are not able to infer something about the return value. */
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static unsigned int
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eight (void)
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{
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unsigned int x = rand ();
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unsigned int y = x * x * x * x;
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x++; y |= x * x * x * x;
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x++; y |= x * x * x * x;
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x++; y |= x * x * x * x;
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y = y >> 1;
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return y & -y;
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}
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int
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main ()
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{
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/* Check that calloc (0, 0) is not a NULL pointer. */
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void *p = calloc (0, 0);
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if (p == NULL)
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return 1;
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free (p);
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/* Check that calloc fails when requested to allocate a block of memory
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larger than SIZE_MAX bytes.
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We use eight (), not 8, to avoid a compiler warning from GCC 7. */
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p = calloc ((size_t) -1 / 8 + 1, eight ());
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if (p != NULL)
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{
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free (p);
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return 1;
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}
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return 0;
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}
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