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f9493a15ea
Since -1 isn't a power of two, compiler may reject it, hide memalign from
Clang 19 which issues an error:
tst-memalign.c:86:31: error: requested alignment is not a power of 2 [-Werror,-Wnon-power-of-two-alignment]
86 | p = memalign (-1, pagesize);
| ^~
tst-memalign.c:86:31: error: requested alignment must be 4294967296 bytes or smaller; maximum alignment assumed [-Werror,-Wbuiltin-assume-aligned-alignment]
86 | p = memalign (-1, pagesize);
| ^~
Update tst-malloc-aux.h to hide all malloc functions and include it in
all malloc tests to prevent compiler from optimizing out any malloc
functions.
Tested with Clang 19.1.5 and GCC 15 20241206 for BZ #32366.
Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Reviewed-by: Sam James <sam@gentoo.org>
127 lines
3.0 KiB
C
127 lines
3.0 KiB
C
/* Test for memalign.
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Copyright (C) 2013-2024 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
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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 <errno.h>
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#include <malloc.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <libc-diag.h>
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#include "tst-malloc-aux.h"
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static int errors = 0;
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static void
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merror (const char *msg)
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{
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++errors;
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printf ("Error: %s\n", msg);
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}
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static int
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do_test (void)
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{
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void *p;
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unsigned long pagesize = getpagesize ();
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unsigned long ptrval;
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int save;
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errno = 0;
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DIAG_PUSH_NEEDS_COMMENT;
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#if __GNUC_PREREQ (7, 0)
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/* GCC 7 warns about too-large allocations; here we want to test
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that they fail. */
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DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
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#endif
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/* An attempt to allocate a huge value should return NULL and set
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errno to ENOMEM. */
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p = memalign (sizeof (void *), -1);
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#if __GNUC_PREREQ (7, 0)
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DIAG_POP_NEEDS_COMMENT;
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#endif
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save = errno;
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if (p != NULL)
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merror ("memalign (sizeof (void *), -1) succeeded.");
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if (p == NULL && save != ENOMEM)
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merror ("memalign (sizeof (void *), -1) errno is not set correctly");
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free (p);
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errno = 0;
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/* Test to expose integer overflow in malloc internals from BZ #15857. */
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p = memalign (pagesize, -pagesize);
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save = errno;
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if (p != NULL)
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merror ("memalign (pagesize, -pagesize) succeeded.");
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if (p == NULL && save != ENOMEM)
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merror ("memalign (pagesize, -pagesize) errno is not set correctly");
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free (p);
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errno = 0;
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/* Test to expose integer overflow in malloc internals from BZ #16038. */
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p = memalign (-1, pagesize);
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save = errno;
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if (p != NULL)
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merror ("memalign (-1, pagesize) succeeded.");
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if (p == NULL && save != EINVAL)
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merror ("memalign (-1, pagesize) errno is not set correctly");
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free (p);
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/* A zero-sized allocation should succeed with glibc, returning a
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non-NULL value. */
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p = memalign (sizeof (void *), 0);
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if (p == NULL)
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merror ("memalign (sizeof (void *), 0) failed.");
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free (p);
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/* Check the alignment of the returned pointer is correct. */
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p = memalign (0x100, 10);
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if (p == NULL)
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merror ("memalign (0x100, 10) failed.");
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ptrval = (unsigned long) p;
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if ((ptrval & 0xff) != 0)
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merror ("pointer is not aligned to 0x100");
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free (p);
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return errors != 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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