Spatial safety violations are the root cause of many security attacks and unexpected behavior of applications. Existing techniques to enforce spatial safety work broadly at either object or pointer granularity. Object-based approaches tend to incur high CPU overheads, whereas pointer-based approaches incur both high CPU and memory overheads. SGXBounds, an object-based approach, provides precise out-of-bounds protection for objects at a lower overhead compared to other tools with similar precision. However, a major drawback of this approach is that it cannot support address space larger than 32-bit.