stdlib/test-atexit-recursive.c

   1 /* Support file for atexit/exit, etc. race tests (BZ #27749).
   2    Copyright (C) 2023 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
  28 static void
  29 atexit_cb (void)
  30 {
  31 }
  32
  33 static void
  34 atexit_last (void)
  35 {
  36   _exit (1);
  37 }
  38
  39 static void
  40 atexit_recursive (void)
  41 {
  42   atexit (&atexit_cb);
  43   atexit (&atexit_last);
  44 }
  45
  46 _Noreturn static void
  47 test_and_exit (int count)
  48 {
  49   for (int i = 0; i < count; ++i)
  50     atexit (&atexit_cb);
  51   atexit (&atexit_recursive);
  52   exit (0);
  53 }
  54
  55 static int
  56 do_test (void)
  57 {
  58   for (int i = 0; i < 100; ++i)
  59     if (xfork () == 0)
  60       test_and_exit (i);
  61
  62   for (int i = 0; i < 100; ++i)
  63     {
  64       int status;
  65       xwaitpid (0, &status, 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>