gcc/testsuite/gcc.target/i386/mpx/memmove-2.c

   1 /* { dg-do run } */
   2 /* { dg-options "-fcheck-pointer-bounds -mmpx" } */
   3
   4
   5 #include <stdint.h>
   6 #include <string.h>
   7 #include "mpx-check.h"
   8
   9 #ifdef __i386__
  10 /* i386 directory size is 4MB.  */
  11 #define MPX_NUM_L2_BITS 10
  12 #define MPX_NUM_IGN_BITS 2
  13 #else /* __i386__ */
  14 /* x86_64 directory size is 2GB.  */
  15 #define MPX_NUM_L2_BITS 17
  16 #define MPX_NUM_IGN_BITS 3
  17 #endif /* !__i386__ */
  18
  19
  20 /* bt_num_of_elems is the number of elements in bounds table.  */
  21 unsigned long bt_num_of_elems = (1UL << MPX_NUM_L2_BITS);
  22
  23 /* Function to test MPX wrapper of memmove function.
  24    Check case with no BT allocated for data.  */
  25
  26 int
  27 mpx_test (int argc, const char **argv)
  28 {
  29   void **arr = 0;
  30   posix_memalign ((void **) (&arr),
  31            1UL << (MPX_NUM_L2_BITS + MPX_NUM_IGN_BITS),
  32            2 * bt_num_of_elems * sizeof (void *));
  33   void **src = arr, **dst = arr, **ptr = arr;
  34   src += 10;
  35   dst += 1;
  36   ptr += bt_num_of_elems + 100;
  37   ptr[0] = __bnd_set_ptr_bounds (arr + 1, sizeof (void *) + 1);
  38   memmove (dst, src, 5 * sizeof (void *));
  39   return 0;
  40 }