static char help[] = "Tests checking pointers.\n\n";

#include <petscsys.h>
#include <petsc/private/petscimpl.h>

int main(int argc, char *args[])
{
  PetscInt *ptr;

  PetscFunctionBeginUser;
  PetscCall(PetscInitialize(&argc, &args, (char *)0, help));
  if (!PETSC_RUNNING_ON_VALGRIND) {                /* PetscCheckPointer always returns TRUE when running on Valgrind */
    PetscCall(PetscMalloc(1024 * 1024 * 8, &ptr)); /* Almost certainly larger than MMAP_THRESHOLD (128 KiB by default) */
    if (!PetscCheckPointer(ptr, PETSC_INT)) PetscCall(PetscPrintf(PETSC_COMM_SELF, "Mistook valid pointer %p for invalid pointer\n", (void *)ptr));
    PetscCall(PetscFree(ptr));
    if (PetscCheckPointer(ptr, PETSC_INT)) PetscCall(PetscPrintf(PETSC_COMM_SELF, "Mistook NULL pointer for valid pointer\n"));
    ptr = (PetscInt *)~(PETSC_UINTPTR_T)0xf; /* Pointer will almost certainly be invalid */
    if (PetscCheckPointer(ptr, PETSC_INT)) PetscCall(PetscPrintf(PETSC_COMM_SELF, "Mistook invalid pointer %p for valid\n", (void *)ptr));
  }
  PetscCall(PetscFinalize());
  return 0;
}

/*TEST

   test:
     args: -check_pointer_intensity 1
     TODO: reports Mistook invalid pointer 0xfffffffffffffff0 for valid or Free'd pointer is still accessible

TEST*/