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/* This test needs to use setrlimit to set the stack size, so it can

   only run on Unix.  */

/* { dg-do run { target *-*-linux* *-*-solaris* *-*-darwin* } } */

/* { dg-require-effective-target split_stack } */

/* { dg-options "-fsplit-stack" } */

#include <stdarg.h>

#include <stdlib.h>

#include <sys/types.h>

#include <sys/resource.h>

/* Use a noinline function to ensure that the buffer is not removed

   from the stack.  */

static void use_buffer (char *buf) __attribute__ ((noinline));

static void

use_buffer (char *buf)

{

  buf[0] = '\0';

}

/* Each recursive call uses 10,000 bytes.  We call it 1000 times,

   using a total of 10,000,000 bytes.  If -fsplit-stack is not

   working, that will overflow our stack limit.  */

static void

down (int i, ...)

{

  char buf[10000];

  va_list ap;

  va_start (ap, i);

  if (va_arg (ap, int) != 1

      || va_arg (ap, int) != 2

      || va_arg (ap, int) != 3

      || va_arg (ap, int) != 4

      || va_arg (ap, int) != 5

      || va_arg (ap, int) != 6

      || va_arg (ap, int) != 7

      || va_arg (ap, int) != 8

      || va_arg (ap, int) != 9

      || va_arg (ap, int) != 10)

    abort ();

  if (i > 0)

    {

      use_buffer (buf);

      down (i - 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10);

    }

}

int

main (void)

{

  struct rlimit r;

  /* We set a stack limit because we are usually invoked via make, and

     make sets the stack limit to be as large as possible.  */

  r.rlim_cur = 8192 * 1024;

  r.rlim_max = 8192 * 1024;

  if (setrlimit (RLIMIT_STACK, &r) != 0)

    abort ();

  down (1000, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10);

  return 0;

}