# Storing Bounds Information

The pointer checker is not supported on macOS systems.

The pointer checker stores bounds information in a bounds table located in a memory address that is not adjacent to the memory address of the pointer. The pointer checker calculates this address by using the address of the pointer.

Because the bounds information is being stored in a separate memory address, use of the pointer checker in this module does not affect the data structure layouts and stack frames. You can check the bounds of pointers in enabled modules. Non-enabled modules will still work properly although this feature will not check the pointers in these modules.

When a pointer is loaded in a register, the compiler also loads the bounds from the bounds table. When a pointer is stored from a register, the compiler stores the bounds information in the bounds table.

Parent topic: Using the Pointer Checker