sysdeps/unix/sysv/linux/tst-align-clone.c

   1 /* Copyright (C) 2004-2024 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <sched.h>
  19 #include <stdbool.h>
  20 #include <stdint.h>
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include <sys/wait.h>
  24 #include <unistd.h>
  25 #include <tst-stack-align.h>
  26 #include <stackinfo.h>
  27
  28 static int
  29 f (void *arg)
  30 {
  31   bool ok = true;
  32
  33   puts ("in f");
  34
  35   if (TEST_STACK_ALIGN ())
  36     ok = false;
  37
  38   return ok ? 0 : 1;
  39 }
  40
  41 static int
  42 do_test (void)
  43 {
  44   bool ok = true;
  45
  46   puts ("in main");
  47
  48   if (TEST_STACK_ALIGN ())
  49     ok = false;
  50
  51   char st[128 * 1024] __attribute__ ((aligned));
  52 #if _STACK_GROWS_DOWN
  53   pid_t p = clone (f, st + sizeof (st), 0, 0);
  54 #elif _STACK_GROWS_UP
  55   pid_t p = clone (f, st, 0, 0);
  56 #else
  57 # error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
  58 #endif
  59   if (p == -1)
  60     {
  61       printf("clone failed: %m\n");
  62       return 1;
  63     }
  64
  65   int e;
  66   if (waitpid (p, &e, __WCLONE) != p)
  67     {
  68       puts ("waitpid failed");
  69       kill (p, SIGKILL);
  70       return 1;
  71     }
  72   if (!WIFEXITED (e))
  73     {
  74       if (WIFSIGNALED (e))
  75         printf ("died from signal %s\n", strsignal (WTERMSIG (e)));
  76       else
  77         puts ("did not terminate correctly");
  78       return 1;
  79     }
  80   if (WEXITSTATUS (e) != 0)
  81     ok = false;
  82
  83   return ok ? 0 : 1;
  84 }
  85
  86 #define TEST_FUNCTION do_test ()
  87 #include "../test-skeleton.c"