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6484ae5b8c
The test leaks bits from the freed pointer via the return value
in ret, and the compiler correctly identifies this issue.
We switch the test to use TEST_VERIFY and terminate the test
if any of the pointers return an unexpected alignment.
This fixes another -Wuse-after-free error when compiling glibc
with gcc 12.
Tested on x86_64 and i686 without regression.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
(cherry picked from commit 3a7bed5f5a)
74 lines
1.6 KiB
C
74 lines
1.6 KiB
C
/* Verify that MALLOC_ALIGNMENT is honored by malloc.
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Copyright (C) 2012-2021 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 <stdio.h>
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#include <stdlib.h>
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#include <inttypes.h>
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#include <malloc-size.h>
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#include <support/check.h>
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static void *
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test (size_t s)
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{
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void *p = malloc (s);
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printf ("malloc: %zu, %p: %zu\n", s, p,
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((uintptr_t) p) & MALLOC_ALIGN_MASK);
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return p;
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}
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#define ALIGNED(p) (((uintptr_t )p & MALLOC_ALIGN_MASK) == 0)
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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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p = test (2);
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TEST_VERIFY (ALIGNED (p));
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free (p);
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p = test (8);
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TEST_VERIFY (ALIGNED (p));
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free (p);
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p = test (13);
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TEST_VERIFY (ALIGNED (p));
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free (p);
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p = test (16);
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TEST_VERIFY (ALIGNED (p));
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free (p);
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p = test (23);
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TEST_VERIFY (ALIGNED (p));
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free (p);
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p = test (43);
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TEST_VERIFY (ALIGNED (p));
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free (p);
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p = test (123);
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TEST_VERIFY (ALIGNED (p));
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free (p);
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return 0;
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}
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#include <support/test-driver.c>
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