1  /* Verify that the clone child stack is properly aligned.
       2     Copyright (C) 2021-2023 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  #include <sched.h>
      20  #include <stdbool.h>
      21  #include <stdint.h>
      22  #include <stdio.h>
      23  #include <string.h>
      24  #include <sys/wait.h>
      25  #include <unistd.h>
      26  #include <tst-stack-align.h>
      27  #include <clone_internal.h>
      28  #include <support/xunistd.h>
      29  #include <support/check.h>
      30  
      31  static int
      32  f (void *arg)
      33  {
      34    puts ("in f");
      35  
      36    return TEST_STACK_ALIGN () ? 1 : 0;
      37  }
      38  
      39  static int
      40  do_test (void)
      41  {
      42    puts ("in main");
      43  
      44    if (TEST_STACK_ALIGN ())
      45      FAIL_EXIT1 ("stack alignment failed");
      46  
      47  #ifdef __ia64__
      48  # define STACK_SIZE 256 * 1024
      49  #else
      50  # define STACK_SIZE 128 * 1024
      51  #endif
      52    char st[STACK_SIZE] __attribute__ ((aligned));
      53    struct clone_args clone_args =
      54      {
      55        .stack = (uintptr_t) st,
      56        .stack_size = sizeof (st),
      57      };
      58    pid_t p = __clone_internal (&clone_args, f, 0);
      59    TEST_VERIFY (p != -1);
      60  
      61    int e;
      62    xwaitpid (p, &e, __WCLONE);
      63    TEST_VERIFY (WIFEXITED (e));
      64    TEST_COMPARE (WEXITSTATUS (e), 0);
      65    return 0;
      66  }
      67  
      68  #include <support/test-driver.c>