glibc/stdlib/bug-getcontext.c

/* BZ 12420 */

#include <errno.h>
#include <fenv.h>
#include <stdio.h>
#include <stdlib.h>
#include <ucontext.h>

static int
do_test (void)
{
#if FE_ALL_EXCEPT == 0
  printf("Skipping test; no support for FP exceptions.\n");
#else
  int except_mask =  FE_DIVBYZERO | FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW;
  int status = feenableexcept (except_mask);

  except_mask = fegetexcept ();
  if (except_mask == -1)
    {
      printf("\nBefore getcontext(): fegetexcept returned: %d\n",
	     except_mask);
      return 1;
    }

  ucontext_t ctx;
  status = getcontext(&ctx);
  if (status)
    {
      printf("\ngetcontext failed, errno: %d.\n", errno);
      return 1;
    }

  printf ("\nDone with getcontext()!\n");
  fflush (NULL);

  int mask = fegetexcept ();
  if (mask != except_mask)
    {
      printf("\nAfter getcontext(): fegetexcept returned: %d, expected: %d.\n",
	     mask, except_mask);
      return 1;
    }

  printf("\nAt end fegetexcept() returned %d, expected: %d.\n",
	 mask, except_mask);
#endif
  return 0;
}

#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"