throw exception if have empty pointer

library/src/utility/device_memory.cpp

@@ -31,6 +31,10 @@ void DeviceMem::ToDevice(const void* p) const
         hip_check_error(
             hipMemcpy(mpDeviceBuf, const_cast<void*>(p), mMemSize, hipMemcpyHostToDevice));
     }
+    else
+    {
+        throw std::runtime_error("ToDevice with an empty pointer");
+    }
 }
 
 void DeviceMem::FromDevice(void* p) const
@@ -39,6 +43,10 @@ void DeviceMem::FromDevice(void* p) const
     {
         hip_check_error(hipMemcpy(p, mpDeviceBuf, mMemSize, hipMemcpyDeviceToHost));
     }
+    else
+    {
+        throw std::runtime_error("FromDevice with an empty pointer");
+    }
 }
 
 void DeviceMem::SetZero() const