stdlib/bug-getcontext.c

   1 /* BZ 12420 */
   2
   3 #include <errno.h>
   4 #include <fenv.h>
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <ucontext.h>
   8
   9 static int
  10 do_test (void)
  11 {
  12   if (FE_ALL_EXCEPT == 0)
  13     {
  14       printf("Skipping test; no support for FP exceptions.\n");
  15       return 0;
  16     }
  17
  18   int except_mask = 0;
  19 #ifdef FE_DIVBYZERO
  20   except_mask |= FE_DIVBYZERO;
  21 #endif
  22 #ifdef FE_INVALID
  23   except_mask |= FE_INVALID;
  24 #endif
  25 #ifdef FE_OVERFLOW
  26   except_mask |= FE_OVERFLOW;
  27 #endif
  28 #ifdef FE_UNDERFLOW
  29   except_mask |= FE_UNDERFLOW;
  30 #endif
  31   int status = feenableexcept (except_mask);
  32
  33   except_mask = fegetexcept ();
  34   if (except_mask == -1)
  35     {
  36       printf("\nBefore getcontext(): fegetexcept returned: %d\n",
  37              except_mask);
  38       return 1;
  39     }
  40
  41   ucontext_t ctx;
  42   status = getcontext(&ctx);
  43   if (status)
  44     {
  45       printf("\ngetcontext failed, errno: %d.\n", errno);
  46       return 1;
  47     }
  48
  49   printf ("\nDone with getcontext()!\n");
  50   fflush (NULL);
  51
  52   int mask = fegetexcept ();
  53   if (mask != except_mask)
  54     {
  55       printf("\nAfter getcontext(): fegetexcept returned: %d, expected: %d.\n",
  56              mask, except_mask);
  57       return 1;
  58     }
  59
  60   printf("\nAt end fegetexcept() returned %d, expected: %d.\n",
  61          mask, except_mask);
  62
  63   return 0;
  64 }
  65
  66 #define TEST_FUNCTION do_test ()
  67 #include "../test-skeleton.c"