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   printf("Skipping test; no support for FP exceptions.\n");
  14 #else
  15   int except_mask =  FE_DIVBYZERO | FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW;
  16   int status = feenableexcept (except_mask);
  17
  18   except_mask = fegetexcept ();
  19   if (except_mask == -1)
  20     {
  21       printf("\nBefore getcontext(): fegetexcept returned: %d\n",
  22              except_mask);
  23       return 1;
  24     }
  25
  26   ucontext_t ctx;
  27   status = getcontext(&ctx);
  28   if (status)
  29     {
  30       printf("\ngetcontext failed, errno: %d.\n", errno);
  31       return 1;
  32     }
  33
  34   printf ("\nDone with getcontext()!\n");
  35   fflush (NULL);
  36
  37   int mask = fegetexcept ();
  38   if (mask != except_mask)
  39     {
  40       printf("\nAfter getcontext(): fegetexcept returned: %d, expected: %d.\n",
  41              mask, except_mask);
  42       return 1;
  43     }
  44
  45   printf("\nAt end fegetexcept() returned %d, expected: %d.\n",
  46          mask, except_mask);
  47 #endif
  48   return 0;
  49 }
  50
  51 #define TEST_FUNCTION do_test ()
  52 #include "../test-skeleton.c"