mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-27 05:00:15 +00:00
63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
/* Verify that backtrace does not deadlock on itself on memory corruption.
|
|
Copyright (C) 2015-2022 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <signal.h>
|
|
#include <stdlib.h>
|
|
|
|
#include <support/support.h>
|
|
#include <libc-diag.h>
|
|
|
|
#define SIZE 4096
|
|
|
|
/* Wrap free with a function to prevent gcc from optimizing it out. */
|
|
static void
|
|
__attribute__((noinline))
|
|
call_free (void *ptr)
|
|
{
|
|
free (ptr);
|
|
#if __GNUC_PREREQ (12, 0)
|
|
/* Ignore a valid warning about using a pointer made indeterminate
|
|
by a prior call to free(). */
|
|
DIAG_IGNORE_NEEDS_COMMENT (12, "-Wuse-after-free");
|
|
#endif
|
|
*(size_t *)(ptr - sizeof (size_t)) = 1;
|
|
#if __GNUC_PREREQ (12, 0)
|
|
DIAG_POP_NEEDS_COMMENT;
|
|
#endif
|
|
}
|
|
|
|
int
|
|
do_test (void)
|
|
{
|
|
void *ptr1 = malloc (SIZE);
|
|
void *ptr2 = malloc (SIZE);
|
|
|
|
/* Avoid unwanted output to TTY after an expected memory corruption. */
|
|
ignore_stderr();
|
|
|
|
call_free (ptr1);
|
|
ptr1 = malloc (SIZE);
|
|
|
|
/* Not reached. The return statement is to put ptr2 into use so that gcc
|
|
doesn't optimize out that malloc call. */
|
|
return (ptr1 == ptr2);
|
|
}
|
|
|
|
#define EXPECTED_SIGNAL SIGABRT
|
|
#include <support/test-driver.c>
|