1/* Support file for atexit/exit, etc. race tests (BZ #27749).
2 Copyright (C) 2023-2024 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19/* Check that atexit handler registered from another handler still called. */
20
21#include <stdio.h>
22#include <stdlib.h>
23#include <support/check.h>
24#include <support/xunistd.h>
25#include <sys/wait.h>
26#include <unistd.h>
27
28static void
29atexit_cb (void)
30{
31}
32
33static void
34atexit_last (void)
35{
36 _exit (1);
37}
38
39static void
40atexit_recursive (void)
41{
42 atexit (func: &atexit_cb);
43 atexit (func: &atexit_last);
44}
45
46_Noreturn static void
47test_and_exit (int count)
48{
49 for (int i = 0; i < count; ++i)
50 atexit (func: &atexit_cb);
51 atexit (func: &atexit_recursive);
52 exit (0);
53}
54
55static int
56do_test (void)
57{
58 for (int i = 0; i < 100; ++i)
59 if (xfork () == 0)
60 test_and_exit (count: i);
61
62 for (int i = 0; i < 100; ++i)
63 {
64 int status;
65 xwaitpid (0, status: &status, flags: 0);
66 if (!WIFEXITED (status))
67 FAIL_EXIT1 ("Failed iterations %d", i);
68 TEST_COMPARE (WEXITSTATUS (status), 1);
69 }
70
71 return 0;
72}
73
74#define TEST_FUNCTION do_test
75#include <support/test-driver.c>
76

source code of glibc/stdlib/test-atexit-recursive.c