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a7477abe29
* doc/glibc-functions/reallocarray.texi (reallocarray): Mention ptrdiff_t overflow. * lib/reallocarray.c (reallocarray): Reindent as per usual GNU. * lib/stdlib.in.h (reallocarray): Allow reallocarray to be replaced. * m4/reallocarray.m4 (gl_FUNC_REALLOCARRAY): Check for ptrdiff_t overflow. * m4/stdlib_h.m4 (gl_STDLIB_H_DEFAULTS): Set up REPLACE_REALLOCARRAY. * modules/reallocarray (Files): Add malloc.m4. (configure.ac): Also test REPLACE_REALLOCARRAY. * modules/reallocarray-tests (Depends-on): Add stdint. * modules/stdlib (stdlib.h): Substitute REPLACE_REALLOCARRAY. * tests/test-reallocarray.c: Include stdint.h. (main): Check for ptrdiff_t overflow.
50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
/* Test of reallocarray function.
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Copyright (C) 2010-2021 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 <https://www.gnu.org/licenses/>. */
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#include <config.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <stdint.h>
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#include "signature.h"
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SIGNATURE_CHECK (reallocarray, void *, (void *, size_t, size_t));
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int
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main ()
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{
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void *volatile p = NULL;
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/* Check that reallocarray fails when requested to allocate a block
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of memory larger than PTRDIFF_MAX or SIZE_MAX bytes. */
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for (size_t n = 2; n != 0; n <<= 1)
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{
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p = reallocarray (p, PTRDIFF_MAX / n + 1, n);
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if (p)
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return 1;
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if (errno != ENOMEM)
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return 2;
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p = reallocarray (p, SIZE_MAX / n + 1, n);
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if (p)
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return 3;
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if (errno != ENOMEM)
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return 4;
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}
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return 0;
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}
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