diff options
Diffstat (limited to 'REORG.TODO/malloc/tst-malloc-backtrace.c')
-rw-r--r-- | REORG.TODO/malloc/tst-malloc-backtrace.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/REORG.TODO/malloc/tst-malloc-backtrace.c b/REORG.TODO/malloc/tst-malloc-backtrace.c new file mode 100644 index 0000000000..012ff81caa --- /dev/null +++ b/REORG.TODO/malloc/tst-malloc-backtrace.c @@ -0,0 +1,53 @@ +/* Verify that backtrace does not deadlock on itself on memory corruption. + Copyright (C) 2015-2017 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 + <http://www.gnu.org/licenses/>. */ + +#include <signal.h> +#include <stdlib.h> + +#include <support/support.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); + *(size_t *)(ptr - sizeof (size_t)) = 1; +} + +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> |