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/* Verify atexit, on_exit, etc. abort on NULL function pointer.
Copyright (C) 2018-2021 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 <assert.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <support/capture_subprocess.h>
#include <support/check.h>
#include <support/support.h>
#include <support/test-driver.h>
extern int __cxa_atexit (void (*func) (void *), void *arg, void *d);
extern int __cxa_at_quick_exit (void (*func) (void *), void *arg, void *d);
/* GCC "knows" that atexit and on_exit should not be called with NULL
function pointer, and emits diagnostics if we try to do so.
Presumably it could emit a trap and drop the call altogether.
The aliases below are intended to bypass this. */
extern int atexit_alias (void (*) (void)) __asm__ ("atexit");
extern int at_quick_exit_alias (void (*) (void)) __asm__ ("at_quick_exit");
extern int on_exit_alias (void (*) (void), void *) __asm__ ("on_exit");
static void
test_bz20544_atexit (void *closure)
{
atexit_alias (NULL); /* Should assert. */
exit (EXIT_FAILURE);
}
static void
test_bz20544_at_quick_exit (void *closure)
{
at_quick_exit_alias (NULL); /* Should assert. */
exit (EXIT_FAILURE);
}
static void
test_bz20544_on_exit (void *closure)
{
on_exit_alias (NULL, NULL); /* Should assert. */
exit (EXIT_FAILURE);
}
static void
test_bz20544_cxa_atexit (void *closure)
{
__cxa_atexit (NULL, NULL, NULL); /* Should assert. */
exit (EXIT_FAILURE);
}
static void
test_bz20544_cxa_at_quick_exit (void *closure)
{
__cxa_at_quick_exit (NULL, NULL, NULL); /* Should assert. */
exit (EXIT_FAILURE);
}
static void
test_one_fn (void (*test_fn) (void *))
{
const char expected_error[] = "Assertion `func != NULL' failed.\n";
struct support_capture_subprocess result;
result = support_capture_subprocess (test_fn, NULL);
support_capture_subprocess_check (&result, "bz20544", -SIGABRT,
sc_allow_stderr);
if (strstr (result.err.buffer, expected_error) == NULL)
{
support_record_failure ();
printf ("Did not find expected string in error output:\n"
" expected: >>>%s<<<\n"
" actual: >>>%s<<<\n",
expected_error, result.err.buffer);
}
support_capture_subprocess_free (&result);
}
static int
do_test (void)
{
#if defined (NDEBUG)
FAIL_UNSUPPORTED ("Assertions disabled (NDEBUG). "
"Can't verify that assertions fire.");
#endif
test_one_fn (test_bz20544_atexit);
test_one_fn (test_bz20544_at_quick_exit);
test_one_fn (test_bz20544_on_exit);
test_one_fn (test_bz20544_cxa_atexit);
test_one_fn (test_bz20544_cxa_at_quick_exit);
return 0;
}
#include <support/test-driver.c>
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