lldb/tools/intel-features/intel-mpx/test/main.cpp

   1 const int size = 5;
   2
   3 #include <cstddef>
   4 #include <cstdlib>
   5 #include <sys/prctl.h>
   6
   7 void func(int *ptr) {
   8   int *tmp;
   9
  10 #if defined  __GNUC__ && !defined __INTEL_COMPILER
  11   __builtin___bnd_store_ptr_bounds ((void**)&ptr, ptr);
  12 #endif
  13   tmp = ptr + size - 1;
  14 #if defined  __GNUC__ && !defined __INTEL_COMPILER
  15   __builtin___bnd_store_ptr_bounds ((void**)&tmp, tmp);
  16 #endif
  17   tmp = (int*)0x2; // Break 2.
  18
  19   return; // Break 3.
  20 }
  21
  22 int
  23 main(int argc, char const *argv[])
  24 {
  25   // This call returns 0 only if the CPU and the kernel support
  26   // Intel(R) Memory Protection Extensions (Intel(R) MPX).
  27   if (prctl(PR_MPX_ENABLE_MANAGEMENT, 0, 0, 0, 0) != 0)
  28         return -1;
  29
  30   int*  a = (int *) calloc(size, sizeof(int));
  31 #if defined  __GNUC__ && !defined __INTEL_COMPILER
  32   __builtin___bnd_store_ptr_bounds ((void**)&a, a);
  33 #endif
  34   func(a); // Break 1.
  35
  36   free(a); // Break 4.
  37
  38   return 0;
  39 }